Electric reciprocating pump failure in the work is to avoid the thing, the main reason is that the electric reciprocating pump is too old, or the continuous use of time is too long. Now small make up to introduce some of the electric reciprocating pump failure analysis method.
Fault analysis of electric reciprocating pump
(1) after the pump can not be used for liquid:
Lax or liner, too much wear 1 ring packing, bakelite expansion or stuck stem ring;
2 valve box in the suction and discharge valve damage or serious leakage, put up;
3 suction pipe leakage;
4 suction mouth exposed level;
5 suction tube obstruction (filter blockage or cut-off valve closed);
6 pump suction is too large, or pipeline resistance is too large;
7 oil when the oil temperature is too low, the viscosity is too large;
Fault analysis of electric reciprocating pump
8 the temperature of the liquid is too high;
The 9 discharge end somewhere (bypass valve leakage or spring loose);
10 discharge line blocking and safety valve opening.
(2) pump abnormal sound:
1 pump cylinder knocking of the cylinder may fall into objects or piston fixed nut loosening;
The 2 cylinder friction sound, may be packed tight or piston ring fracture;
3 the percussion sound in the valve box may be insufficient for spring break or elastic force, so that the valve lift is too large;
4 transmission parts clearance is too large;
A 5 pump cylinder may also be "liquid hammer", then inevitably associated with suction vacuum through the large and obvious characteristics such as pressure gauge pointer swing, see reason (L) in 5 ~ eight.
11/27/2016
Analysis of the development status of vertical single stage centrifugal pump
Pump began to take root in the country since 60s, economic development and living standards for the pump market have more choices, the development of China economy promotes people to improve the quality of life, improve the quality of life of colleagues and to promote the development of the industry as one of the beneficiaries is the pump, pump, began to emerge in all walks of life quickly the development of the domestic pump market also blossom everywhere, showing a momentum of prosperity. Centrifugal pump on the basis of the development of a new kind of pump can be extended out: vertical single - stage centrifugal pump. This is a more superior performance of the type of centrifugal pump.
There is vertical single-stage centrifugal pump centrifugal pump, gives a chance of development, compared with the conventional centrifugal pump, vertical single-stage centrifugal pump has its unique advantages, has also been recognized by the people, is very popular in the industry, and the dosage gradually increased, there have been many domestic the manufacturer, Zhuluzhongyuan competition, large and small enterprises want to share, which led to the market heavy load, small enterprise development limited, the gradual emergence of vicious competition, this competition to bring to the market impact, began to vicious spiral.
And, with the growth of demand, future not only for enterprises, will also have higher requirements for vertical single stage centrifugal pump, this will eliminate a number of poor capacity of enterprises, the result must be mighty wave crashing on a sandy shore, the survival of the fittest, but a protracted process, for the current pump, no chaos can not afford such a protracted war.
The imported products began streamed in people's lives, will produce a certain pressure on the existing domestic enterprises. Therefore, the development of vertical single stage centrifugal pump to promote more powerful, independent innovation is one kind of driving force, independent innovation industry enterprise is equivalent to the self-help industry.
Jiangsu Quan Department of domestic well-known liquid pump enterprises, shouldering important responsibility pump development, always adhere to innovation, the introduction of technology of fresh, exercise their ability to pump output, it can promote the development of enterprises with more pump to drive their own development, and ultimately, to obtain even win-win good situation.
There is vertical single-stage centrifugal pump centrifugal pump, gives a chance of development, compared with the conventional centrifugal pump, vertical single-stage centrifugal pump has its unique advantages, has also been recognized by the people, is very popular in the industry, and the dosage gradually increased, there have been many domestic the manufacturer, Zhuluzhongyuan competition, large and small enterprises want to share, which led to the market heavy load, small enterprise development limited, the gradual emergence of vicious competition, this competition to bring to the market impact, began to vicious spiral.
And, with the growth of demand, future not only for enterprises, will also have higher requirements for vertical single stage centrifugal pump, this will eliminate a number of poor capacity of enterprises, the result must be mighty wave crashing on a sandy shore, the survival of the fittest, but a protracted process, for the current pump, no chaos can not afford such a protracted war.
The imported products began streamed in people's lives, will produce a certain pressure on the existing domestic enterprises. Therefore, the development of vertical single stage centrifugal pump to promote more powerful, independent innovation is one kind of driving force, independent innovation industry enterprise is equivalent to the self-help industry.
Jiangsu Quan Department of domestic well-known liquid pump enterprises, shouldering important responsibility pump development, always adhere to innovation, the introduction of technology of fresh, exercise their ability to pump output, it can promote the development of enterprises with more pump to drive their own development, and ultimately, to obtain even win-win good situation.
11/24/2016
QJ deep well pump motor temperature rise is the main reason
What treatment method is blocking air duct duct check motor, check the cause obstruction of the breeze, clean dust and dirt in the air duct, keep the duct open, the motor normal temperature rise.
QJ deep well pump motor temperature rise is the main reason
(1) the overload treatment method of the motor is to check whether the running current of the motor exceeds the rated current. The motor current is too large, should check the cause of excessive current, such as caused by the fault of the pump or motor, should be excluded from the fault; if the pump load caused by excessive power, should reduce or increase the pump motor, the power of pump and motor can be matched with each other, to ensure the normal and reliable operation of deep well pump.
(2) the lack of phase operation of motor is to check the power supply, control protection switch and the connection of the motor for deep well pump, to find out the reason of the lack of power supply, and to restore the normal power supply.
(3) the power supply voltage is too low processing method is to check the cause of the voltage is too low, troubleshooting, and re adjust the power supply voltage to 342V.
(4) air duct obstruction treatment method is air motor check, check the cause obstruction of the breeze, clean dust and dirt in the air duct, keep the duct open, the motor normal temperature rise.
(5) the environmental temperature is too high treatment method is to regulate the flow and head of the pump, reduce the load of the motor or take appropriate measures to reduce the temperature, reduce the temperature of the motor.
QJ deep well pump motor temperature rise is the main reason
(1) the overload treatment method of the motor is to check whether the running current of the motor exceeds the rated current. The motor current is too large, should check the cause of excessive current, such as caused by the fault of the pump or motor, should be excluded from the fault; if the pump load caused by excessive power, should reduce or increase the pump motor, the power of pump and motor can be matched with each other, to ensure the normal and reliable operation of deep well pump.
(2) the lack of phase operation of motor is to check the power supply, control protection switch and the connection of the motor for deep well pump, to find out the reason of the lack of power supply, and to restore the normal power supply.
(3) the power supply voltage is too low processing method is to check the cause of the voltage is too low, troubleshooting, and re adjust the power supply voltage to 342V.
(4) air duct obstruction treatment method is air motor check, check the cause obstruction of the breeze, clean dust and dirt in the air duct, keep the duct open, the motor normal temperature rise.
(5) the environmental temperature is too high treatment method is to regulate the flow and head of the pump, reduce the load of the motor or take appropriate measures to reduce the temperature, reduce the temperature of the motor.
11/22/2016
Reasons for large flow rate of deep well submersible pump
There is a certain relationship between the current deviation of the submersible pump and the adjustment of the pump valve and the mechanical failure of the motor. The main reasons are as follows:
1, motor, water pump guide bearing wear rubber bearing wear, bearing wear ring motor or pump, the submersible pump in the normal working state of the machine, serious damage to the submersible pump, the stator winding. Processing method is to repair or replace the damaged bearings and bushings.
2, submersible pump flow is too large or too small to use the flow beyond the scope of use will make the motor overload of centrifugal pump or mixed flow pump, excessive flow, the pump shaft power increases, will make the motor overload; the axial flow pump, the flow is too small, the pump shaft power will increase the motor overload. The treatment method is appropriate to adjust the valve, the centrifugal pump or mixed flow pump to reduce (to increase the axial flow pump) flow, so that the flow of the pump in the normal range of use.
3, submersible pump shaft bending, the bearing is not concentric such a serious situation, should immediately repair, shaft bending, replace the bearing failure, re assembly of submersible pump.
4, thrust bearing wear, deep well submersible pump impeller and the next cover wear this situation will also make the deep well submersible pump in the mechanical work is not in the normal state, serious damage to the submersible electric pump. The treatment method is to check the cause of the thrust bearing wear, whether the shaft extension end mechanical seal damage, resulting in sand, impurities, etc. into the motor cavity and cause excessive wear of thrust bearing. If it is the cause of mechanical seals, in the repair or replace the wear of thrust bearings, thrust plate and impeller, under the cover plate and other parts of the same time, should replace the shaft extension end mechanical seal.
5, deep well submersible pump current bias and selection of the relevant, deep submersible pump selection head is too large, the actual use of small head.
1, motor, water pump guide bearing wear rubber bearing wear, bearing wear ring motor or pump, the submersible pump in the normal working state of the machine, serious damage to the submersible pump, the stator winding. Processing method is to repair or replace the damaged bearings and bushings.
2, submersible pump flow is too large or too small to use the flow beyond the scope of use will make the motor overload of centrifugal pump or mixed flow pump, excessive flow, the pump shaft power increases, will make the motor overload; the axial flow pump, the flow is too small, the pump shaft power will increase the motor overload. The treatment method is appropriate to adjust the valve, the centrifugal pump or mixed flow pump to reduce (to increase the axial flow pump) flow, so that the flow of the pump in the normal range of use.
3, submersible pump shaft bending, the bearing is not concentric such a serious situation, should immediately repair, shaft bending, replace the bearing failure, re assembly of submersible pump.
4, thrust bearing wear, deep well submersible pump impeller and the next cover wear this situation will also make the deep well submersible pump in the mechanical work is not in the normal state, serious damage to the submersible electric pump. The treatment method is to check the cause of the thrust bearing wear, whether the shaft extension end mechanical seal damage, resulting in sand, impurities, etc. into the motor cavity and cause excessive wear of thrust bearing. If it is the cause of mechanical seals, in the repair or replace the wear of thrust bearings, thrust plate and impeller, under the cover plate and other parts of the same time, should replace the shaft extension end mechanical seal.
5, deep well submersible pump current bias and selection of the relevant, deep submersible pump selection head is too large, the actual use of small head.
11/20/2016
Comparative analysis of the internal loaded submersible pump and the ordinary submersible pump
A built-in type submersible pump is a type of submersible pump, the fenced in and outside a motor pump shell (motor and pump shell can also be made into a whole, into a ring structure), mounted on the pump outlet cover (or water Festival). The built-in electric submersible pump from the pump, motor, sealing, cooling water jackets, pump motor is located in the upper part of three-phase asynchronous motor.
The built-in submersible pump in the lower part of a multi-stage centrifugal impeller radial diffuser structure; two independent mechanical seal between the pump and motor, seal the mouth of the fixed stop using the "O" shapedrubberringasstatic sealingoil; motor coat with steel cooling water pump work when the water from the water jacket and the gap between the motor through a cooling effect on the motor and the bearing, so the electric pump can work the upper surface. The liquid flows through the annular space between the pump casing and the motor frame upward flow, direct cooling motor base surface, the water outflow cover.
The built-in motor cooling effect of submersible pump, on occasion, large area ground drainage long time good effect and high reliability, and the pump shaft by the hard chrome plating, not easy to wear, corrosion, maintenance and easy dismantling of the impeller. The electric pump has the advantages of compact structure, small volume, convenient movement, high lift, and the like.
Submersible pump is installed inside the motor installed outside the pipe as the water channel, then discharged directly from the liquid pump drainage pipe, not through the motor when the motor is running out of the water surface, poor cooling it. In order to improve the cooling conditions of external mounted electric submersible pump, often large power motor base made of jacket type, will be part of the introduction of a liquid pump outlet cooling motor sleeve clamp. When the surface of the electric motor is exposed, the cooling effect is better, but the cooling effect is less than that of the built-in type submersible pump.
At present, the domestic production of QX submersible pumps and QDX type submersible pumps and most of the QW and WQ type submersible sewage pumps are all belong to the external installation of submersible electric pump.
The built-in submersible pump in the lower part of a multi-stage centrifugal impeller radial diffuser structure; two independent mechanical seal between the pump and motor, seal the mouth of the fixed stop using the "O" shapedrubberringasstatic sealingoil; motor coat with steel cooling water pump work when the water from the water jacket and the gap between the motor through a cooling effect on the motor and the bearing, so the electric pump can work the upper surface. The liquid flows through the annular space between the pump casing and the motor frame upward flow, direct cooling motor base surface, the water outflow cover.
The built-in motor cooling effect of submersible pump, on occasion, large area ground drainage long time good effect and high reliability, and the pump shaft by the hard chrome plating, not easy to wear, corrosion, maintenance and easy dismantling of the impeller. The electric pump has the advantages of compact structure, small volume, convenient movement, high lift, and the like.
Submersible pump is installed inside the motor installed outside the pipe as the water channel, then discharged directly from the liquid pump drainage pipe, not through the motor when the motor is running out of the water surface, poor cooling it. In order to improve the cooling conditions of external mounted electric submersible pump, often large power motor base made of jacket type, will be part of the introduction of a liquid pump outlet cooling motor sleeve clamp. When the surface of the electric motor is exposed, the cooling effect is better, but the cooling effect is less than that of the built-in type submersible pump.
At present, the domestic production of QX submersible pumps and QDX type submersible pumps and most of the QW and WQ type submersible sewage pumps are all belong to the external installation of submersible electric pump.
11/18/2016
Effective measures to prolong the use period of the stainless steel pipeline pump
Various types of stainless steel pipe pump transmission medium, working temperature and pressure are different, according to the medium properties can be divided into molten salt pump, stainless steel pipe, stainless steel pipe pump sulfate acid and alkali resistant stainless steel pipeline pump, water pump, stainless steel pipes, stainless steel pipe, liquid sulfur pump slurry pump. Stainless steel pipeline pumps are widely used in petrochemical industry, coal chemical industry, transport of different nature of the liquid, to provide the pressure of chemical reactions, flow. Therefore, the effective extension of the use of stainless steel pipeline pump cycle, reduce the amount of maintenance, to improve the economic efficiency of the plant has a great effect.
The choice and installation of stainless steel pipeline pump
Stainless steel pipeline pump should be carried out in accordance with the delivery of the liquid to choose, and check the performance needs, analysis of suction, discharge conditions, is intermittent or continuous operation, etc.. Stainless steel piping pumps are generally designed to operate under pressure and flow conditions at or close to the manufacturer's design requirements. Stainless steel pipeline pump installation should be carried out the following review:
According to the characteristics of the transmission medium of stainless steel pipeline pump, when necessary, should check the main parts, shaft seal and gasket material.
The basic size, location, elevation should meet the design requirements, anchor bolts must be properly and correctly fixed in the concrete foundation, the machine should not be missing, damage or corrosion etc..
Leveling the stainless steel pipeline pump, looking for work should be specified in the technical documentation in accordance with the equipment, if not specified, shall comply with the provisions of the current national standard "mechanical equipment installation engineering construction and acceptance of the" general specification.
All pump connected to the pipe fittings, wash oil pipe installation and requirements should be in accordance with the relevant national standards.
Effective measures to prolong the use period of the stainless steel pipeline pump
Two, the use of stainless steel pipe pump
The test run of the pump shall meet the following requirements:
1 the fixed connection parts shall not be loose, the lubricating parts filling lubricant specifications and quantity should be in accordance with the provisions of the technical documents of the equipment;
2 identify coaxial pipeline pumps and steering pump.
3 the steering of the drive unit should be the same as that of the stainless steel pipe pump.
4 pre lubrication requirements of the parts should be pre lubricated as required.
5 each indicating instrument, the safety protection device should be sensitive, accurate and reliable.
6 turning gear should be flexible, no abnormal phenomenon.
7 set the connection device to eliminate the influence of temperature rise, set the bypass connection device to provide cooling water.
8 high temperature stainless steel pipeline pump should be carried out before the test run, the temperature should be increased, the temperature rise should not be greater than 500 degrees Celsius, the surface of the pump body and the temperature difference between the inlet of the working medium should not be too high.
Stainless steel pipeline pump operation should pay attention to the following points:
1 lubricants do not use too much.
2 check according to the recommended cycle. Set up running records, including running hours, packing adjustment and replacement, adding lubricants and other maintenance measures and time. Pump suction and discharge pressure, flow rate, input power, temperature and vibration of the liquid and bearing temperature and vibration of the stainless steel pipeline pump should be measured regularly.
3 to ensure that the mechanical seal has a fully developed water flow, water cooling bearings to prohibit the use of excess water.
4 no water running, do not adjust the suction population to reduce emissions, to prohibit the operation of low traffic.
5 monitor the operation process, completely prevent the leakage of the packing box, replace the packing box to use the new packing.
The choice and installation of stainless steel pipeline pump
Stainless steel pipeline pump should be carried out in accordance with the delivery of the liquid to choose, and check the performance needs, analysis of suction, discharge conditions, is intermittent or continuous operation, etc.. Stainless steel piping pumps are generally designed to operate under pressure and flow conditions at or close to the manufacturer's design requirements. Stainless steel pipeline pump installation should be carried out the following review:
According to the characteristics of the transmission medium of stainless steel pipeline pump, when necessary, should check the main parts, shaft seal and gasket material.
The basic size, location, elevation should meet the design requirements, anchor bolts must be properly and correctly fixed in the concrete foundation, the machine should not be missing, damage or corrosion etc..
Leveling the stainless steel pipeline pump, looking for work should be specified in the technical documentation in accordance with the equipment, if not specified, shall comply with the provisions of the current national standard "mechanical equipment installation engineering construction and acceptance of the" general specification.
All pump connected to the pipe fittings, wash oil pipe installation and requirements should be in accordance with the relevant national standards.
Effective measures to prolong the use period of the stainless steel pipeline pump
Two, the use of stainless steel pipe pump
The test run of the pump shall meet the following requirements:
1 the fixed connection parts shall not be loose, the lubricating parts filling lubricant specifications and quantity should be in accordance with the provisions of the technical documents of the equipment;
2 identify coaxial pipeline pumps and steering pump.
3 the steering of the drive unit should be the same as that of the stainless steel pipe pump.
4 pre lubrication requirements of the parts should be pre lubricated as required.
5 each indicating instrument, the safety protection device should be sensitive, accurate and reliable.
6 turning gear should be flexible, no abnormal phenomenon.
7 set the connection device to eliminate the influence of temperature rise, set the bypass connection device to provide cooling water.
8 high temperature stainless steel pipeline pump should be carried out before the test run, the temperature should be increased, the temperature rise should not be greater than 500 degrees Celsius, the surface of the pump body and the temperature difference between the inlet of the working medium should not be too high.
Stainless steel pipeline pump operation should pay attention to the following points:
1 lubricants do not use too much.
2 check according to the recommended cycle. Set up running records, including running hours, packing adjustment and replacement, adding lubricants and other maintenance measures and time. Pump suction and discharge pressure, flow rate, input power, temperature and vibration of the liquid and bearing temperature and vibration of the stainless steel pipeline pump should be measured regularly.
3 to ensure that the mechanical seal has a fully developed water flow, water cooling bearings to prohibit the use of excess water.
4 no water running, do not adjust the suction population to reduce emissions, to prohibit the operation of low traffic.
5 monitor the operation process, completely prevent the leakage of the packing box, replace the packing box to use the new packing.
11/16/2016
How to type selection of domestic hot water circulation pump
The hot water pump impeller domestic hot water circulating pump is directly mounted on the motor shaft extended, short axial size, compact structure, pump and motor bearings reasonable configuration, can effectively balance the pump functioning of the radial and axial load, so as to ensure the smooth operation of the pump vibration, low noise. In the domestic hot water cycle pump selection of the need to pay attention to the point there are a lot of.
1, hot water circulating pump for the vertical structure, import and export of the same caliber, and in the same center line, can be the same as the valve installed in the pipe, an installation foot, increase the stability of the pump, compact appearance, small footprint, low construction investment.
2, hot water pump impeller mounted directly on the extension of the motor shaft, short axial size, compact structure, pump and motor bearings reasonable configuration, can effectively balance the pump functioning of the radial and axial load, so as to ensure the smooth operation of the pump vibration, low noise.
3, hot water pump shaft with mechanical seal or mechanical seal combination, the use of imported titanium alloy sealing ring, medium and high temperature mechanical seal with carbide materials, wear-resistant sealing, can effectively increase the service life of mechanical seal.
How to type selection of domestic hot water circulation pump
Relevant models and parameters of domestic hot water circulating pump:
1, model: IRG15-80:
Flow rate (m3/h):1.1; head (m):8.5; efficiency (%):26; speed (r/min):2900;
Motor power (kw):0.18; cavitation margin (m) 2.3:; weight (kg):17;
2, model: IRG20-110:
Flow rate (m3/h):1.5; head (m):8; efficiency (%):34; speed (r/min):2900;
Motor power (kw):0.37; cavitation margin (m):2.3; weight (kg):17;
3, model: IRG20-160:
Flow rate (m3/h):2.0; head (m):7; efficiency (%):34; speed (r/min):2900;
Motor power (kw):0.18; cavitation margin (m) 2.3:; weight (kg):17;
4, model: IRG25-110:
Flow rate (m3/h):1.8; head (m):16; efficiency (%):25; speed (r/min):2900;
Motor power (kw) 0.18:; cavitation margin (m):2.3; weight (kg):17;
5, model: IRG25-125:
Flow rate (m3/h):2.5; head (m):15; efficiency (%):34; speed (r/min):2900;
Motor power (kw):0.37; cavitation margin (m): weight (kg):25;
Domestic hot water circulation pump for easy installation and maintenance, no need to open pipeline system, only need to unload the pump body nut to be pulled out all the rotor parts, according to the requirement that the head of the traffic and the need for a pump series, parallel operation mode, can also according to the requirements of piping layout using the vertical and horizontal pump installation.
1, hot water circulating pump for the vertical structure, import and export of the same caliber, and in the same center line, can be the same as the valve installed in the pipe, an installation foot, increase the stability of the pump, compact appearance, small footprint, low construction investment.
2, hot water pump impeller mounted directly on the extension of the motor shaft, short axial size, compact structure, pump and motor bearings reasonable configuration, can effectively balance the pump functioning of the radial and axial load, so as to ensure the smooth operation of the pump vibration, low noise.
3, hot water pump shaft with mechanical seal or mechanical seal combination, the use of imported titanium alloy sealing ring, medium and high temperature mechanical seal with carbide materials, wear-resistant sealing, can effectively increase the service life of mechanical seal.
How to type selection of domestic hot water circulation pump
Relevant models and parameters of domestic hot water circulating pump:
1, model: IRG15-80:
Flow rate (m3/h):1.1; head (m):8.5; efficiency (%):26; speed (r/min):2900;
Motor power (kw):0.18; cavitation margin (m) 2.3:; weight (kg):17;
2, model: IRG20-110:
Flow rate (m3/h):1.5; head (m):8; efficiency (%):34; speed (r/min):2900;
Motor power (kw):0.37; cavitation margin (m):2.3; weight (kg):17;
3, model: IRG20-160:
Flow rate (m3/h):2.0; head (m):7; efficiency (%):34; speed (r/min):2900;
Motor power (kw):0.18; cavitation margin (m) 2.3:; weight (kg):17;
4, model: IRG25-110:
Flow rate (m3/h):1.8; head (m):16; efficiency (%):25; speed (r/min):2900;
Motor power (kw) 0.18:; cavitation margin (m):2.3; weight (kg):17;
5, model: IRG25-125:
Flow rate (m3/h):2.5; head (m):15; efficiency (%):34; speed (r/min):2900;
Motor power (kw):0.37; cavitation margin (m): weight (kg):25;
Domestic hot water circulation pump for easy installation and maintenance, no need to open pipeline system, only need to unload the pump body nut to be pulled out all the rotor parts, according to the requirement that the head of the traffic and the need for a pump series, parallel operation mode, can also according to the requirements of piping layout using the vertical and horizontal pump installation.
11/15/2016
Scope of use of domestic circulating pump
According to the story usually when we use water heater, must first go to the hot water, cold water, and domestic hot water circulation pump, completely solve this kind of problem, installation of domestic hot water circulating pump, leading open hot water, no need to wait, this product is a city by consumers praise and pursuit. But what are the characteristics of domestic hot water circulation pump?
Features of domestic hot water circulation pump
The application of domestic hot water circulating pump circulating preheating technology, realize the hot plug and play, no need to wait, make the household hot water comfort has been greatly improved, while the domestic hot water circulation pump can also be more intelligent bath of constant temperature water supply, priority, multi floor water supply, fast and convenient. At the same time, the preheating circulating technology of the domestic hot water circulation pump avoids the unnecessary waste of the pipeline water in the traditional water heater, and saves a large amount of water for living. The real-time monitoring of domestic hot water circulating pump uninterrupted heating system, to avoid the waste of water in the shower, gas, electricity and other resources, in addition, domestic hot water circulation pump with quick preheating technology, according to the water temperature of the water heater automatic selection of different heating energy, energy-saving effect is very significant.
Scope of use of domestic circulating pump
Domestic hot water circulation pump easy to use it
Domestic hot water circulation pump with a comfortable, safe, stable, water-saving, energy saving, solar terms and other features, is a modern home life will be equipped with products. Domestic hot water circulating pump generally adopts the temperature and time are two ways to control the water temperature, can make an appointment to set the time, ensure not because people are not at home also recycling and waste of energy; you can set yourself free love hot water temperature in the system, the water temperature is lower than the preset temperature, circulating pump start cycle, to ensure that the system is in the set the water in the water time keep constant temperature setting.
Scope of application of domestic hot water circulation pump
Domestic hot water circulation pump can be matched with the current general gas water heater, solar water heater, air can be used as a common water heater, there are no water return pipes are suitable for installation. Usually hot water pipes longer for family, in addition, the upscale hotel uniform water supply 24 hours or some places of business, need more hot water circulation system, to meet customer demand for water for 24 hours; there is some water circulating heating water circulation heating or family, and some places need constant temperature, such as medicine, rare plant animal farm fields suitable for hot water circulation system.
Features of domestic hot water circulation pump
The application of domestic hot water circulating pump circulating preheating technology, realize the hot plug and play, no need to wait, make the household hot water comfort has been greatly improved, while the domestic hot water circulation pump can also be more intelligent bath of constant temperature water supply, priority, multi floor water supply, fast and convenient. At the same time, the preheating circulating technology of the domestic hot water circulation pump avoids the unnecessary waste of the pipeline water in the traditional water heater, and saves a large amount of water for living. The real-time monitoring of domestic hot water circulating pump uninterrupted heating system, to avoid the waste of water in the shower, gas, electricity and other resources, in addition, domestic hot water circulation pump with quick preheating technology, according to the water temperature of the water heater automatic selection of different heating energy, energy-saving effect is very significant.
Scope of use of domestic circulating pump
Domestic hot water circulation pump easy to use it
Domestic hot water circulation pump with a comfortable, safe, stable, water-saving, energy saving, solar terms and other features, is a modern home life will be equipped with products. Domestic hot water circulating pump generally adopts the temperature and time are two ways to control the water temperature, can make an appointment to set the time, ensure not because people are not at home also recycling and waste of energy; you can set yourself free love hot water temperature in the system, the water temperature is lower than the preset temperature, circulating pump start cycle, to ensure that the system is in the set the water in the water time keep constant temperature setting.
Scope of application of domestic hot water circulation pump
Domestic hot water circulation pump can be matched with the current general gas water heater, solar water heater, air can be used as a common water heater, there are no water return pipes are suitable for installation. Usually hot water pipes longer for family, in addition, the upscale hotel uniform water supply 24 hours or some places of business, need more hot water circulation system, to meet customer demand for water for 24 hours; there is some water circulating heating water circulation heating or family, and some places need constant temperature, such as medicine, rare plant animal farm fields suitable for hot water circulation system.
11/13/2016
Reasonable selection of vertical pipe pump and pipeline centrifugal pump
A lot of friends in the choice of pipeline pump products will be asked to choose the vertical pipe pump, pipeline centrifugal pump or horizontal pipeline pump.
The so-called reasonable selection of pumps, is to consider the pump unit and pump station investment and operation costs and other comprehensive technical and economic indicators, so that it is in line with the principles of economic, security, applicable. Tiangong pump Liu manager to give you introduced the following: slurry pump selection specifically has the following several aspects:
1 must meet the requirements of using the flow and head, which requires the pump operating time point (intersection curve and performance characteristics of the pump device) to keep running at high efficiency range, so that power is both easy to damaged parts.
2 pumps are selected for both small size, light weight, low cost, but also has a good characteristic and high efficiency.
3 has a good anti cavitation performance, this can reduce the pumping station at the depth of excavation, not to pump cavitation, smooth operation and long life.
4 according to the selected pump pump station, the project investment is low, the operation cost is low.
The so-called reasonable selection of pumps, is to consider the pump unit and pump station investment and operation costs and other comprehensive technical and economic indicators, so that it is in line with the principles of economic, security, applicable. Tiangong pump Liu manager to give you introduced the following: slurry pump selection specifically has the following several aspects:
1 must meet the requirements of using the flow and head, which requires the pump operating time point (intersection curve and performance characteristics of the pump device) to keep running at high efficiency range, so that power is both easy to damaged parts.
2 pumps are selected for both small size, light weight, low cost, but also has a good characteristic and high efficiency.
3 has a good anti cavitation performance, this can reduce the pumping station at the depth of excavation, not to pump cavitation, smooth operation and long life.
4 according to the selected pump pump station, the project investment is low, the operation cost is low.
Dielectric properties and material selection of pump
The basic requirement for a successful pump device is performance and lifetime. Performance is the pump parameters: head, flow and efficiency. Life is the total number of hours in which one or several parts have to be replaced before the performance is maintained. Is mainly in the actual operating conditions of structural materials to resist corrosion. Erosion or a measure of the combination of these two.
In the process of selection of pump components materials, you need to consider factors; user experience, is expected to pump life (such as for short-term or long-term use), intermittent or continuous use, pumping hazardous or toxic liquid or liquid condition. The corrosive liquid of a liquid is different from one or more of the following conditions: temperature, concentration, and temperature. Purity and speed. In solid and gas. Usually refers to the chromium content of stainless steel
The addition of Fe based corrosion resistant alloy 12%~30% can influence and change the microstructure and properties of the alloy. According to the different carbon content, the 18% chromium stainless steel can be divided into three categories. Ferrite steel, which is less than 0.08% carbon, and 0.08%~0.22% carbon austenite ferrite steel and austenitic steel more than 0.22% carbon.
Selection of materials due to the consideration of the problem:
1) the corrosion of the medium: the corrosion resistance of the material to the medium has a certain range of. For example, 1Cr18Ni9 resistance, dilute concentrations of nitric acid or organic acid corrosion. But not resistant to dilute sulfuric acid, hydrochloric acid corrosion.
2) electrochemical corrosion; the same metal material is best used in the whole flow channel of the pump.
3) the medium temperature: the material is brittle at very low temperature. In the high temperature creep corrosion will produce a medium; the ability of a material at room temperature. But not necessarily resistant to high temperature of the medium of rot
Corrosion; therefore, the material properties should meet the requirements of the transmission medium temperature.
4) economy: the materials are different, the price of the machine and the machining performance are not the same, so in several materials at the same time to meet the corrosion. Temperature requirements, should choose the price is relatively cheap, machining
Good performance material.
5) the wear of the solid particles: the medium containing abrasive particles, the wear resistant materials should be used.
6) bite material; for relative movement of the parts, such as shaft and shaft sleeve. Bolt and nut, impeller sealing ring and pump body seal ring, etc., in the selection of materials should make the hardness of the parts of some differences, or in the handling and operation of easy to bite each other.
7) the size of temperature of the same part: when the same parts of the temperature difference is large, as in high temperature liquid transfer pump cover and the pump cover and the cooling medium contact temperature expansion, and cooling
The temperature of the water contact is small, so the parts should adopt the material with good plasticity, so as to avoid the crack caused by the expansion of the movement.
8) need to weld parts: in the casting, processing and use process need to repair welding parts of the application of good welding materials, such as low carbon steel welding is better than high carbon steel
9) the single stage head is very high: the single stage head is very high, the liquid flow rate is very high, over flow components should use the high strength steel, such as precipitation hardening stainless steel.
In the process of selection of pump components materials, you need to consider factors; user experience, is expected to pump life (such as for short-term or long-term use), intermittent or continuous use, pumping hazardous or toxic liquid or liquid condition. The corrosive liquid of a liquid is different from one or more of the following conditions: temperature, concentration, and temperature. Purity and speed. In solid and gas. Usually refers to the chromium content of stainless steel
The addition of Fe based corrosion resistant alloy 12%~30% can influence and change the microstructure and properties of the alloy. According to the different carbon content, the 18% chromium stainless steel can be divided into three categories. Ferrite steel, which is less than 0.08% carbon, and 0.08%~0.22% carbon austenite ferrite steel and austenitic steel more than 0.22% carbon.
Selection of materials due to the consideration of the problem:
1) the corrosion of the medium: the corrosion resistance of the material to the medium has a certain range of. For example, 1Cr18Ni9 resistance, dilute concentrations of nitric acid or organic acid corrosion. But not resistant to dilute sulfuric acid, hydrochloric acid corrosion.
2) electrochemical corrosion; the same metal material is best used in the whole flow channel of the pump.
3) the medium temperature: the material is brittle at very low temperature. In the high temperature creep corrosion will produce a medium; the ability of a material at room temperature. But not necessarily resistant to high temperature of the medium of rot
Corrosion; therefore, the material properties should meet the requirements of the transmission medium temperature.
4) economy: the materials are different, the price of the machine and the machining performance are not the same, so in several materials at the same time to meet the corrosion. Temperature requirements, should choose the price is relatively cheap, machining
Good performance material.
5) the wear of the solid particles: the medium containing abrasive particles, the wear resistant materials should be used.
6) bite material; for relative movement of the parts, such as shaft and shaft sleeve. Bolt and nut, impeller sealing ring and pump body seal ring, etc., in the selection of materials should make the hardness of the parts of some differences, or in the handling and operation of easy to bite each other.
7) the size of temperature of the same part: when the same parts of the temperature difference is large, as in high temperature liquid transfer pump cover and the pump cover and the cooling medium contact temperature expansion, and cooling
The temperature of the water contact is small, so the parts should adopt the material with good plasticity, so as to avoid the crack caused by the expansion of the movement.
8) need to weld parts: in the casting, processing and use process need to repair welding parts of the application of good welding materials, such as low carbon steel welding is better than high carbon steel
9) the single stage head is very high: the single stage head is very high, the liquid flow rate is very high, over flow components should use the high strength steel, such as precipitation hardening stainless steel.
11/11/2016
In the open pump mouth ring components are what?
Abstract: the impeller and pump body of the open pump are respectively provided with replaceable seal ring, which is also a mouth ring. Annular ring type, double ring type, double ring labyrinth type and axial gap type are usually arranged in the structure form of the open pump mouth ring. The role of the open pump mouth ring is formed between the impeller and pump casing narrow, tortuous channel, the impeller and the pump body on the pump body are provided with a replaceable seal ring is also the mouth ring. Annular ring type, double ring type, double ring labyrinth type and axial gap type are usually arranged in the structure form of the open pump mouth ring.
Key words: open pump, mouth ring, sealing ring
The role of the open pump mouth ring is formed between the impeller and the pump shell narrow, tortuous channel, to increase the flow resistance of the media, to reduce the purpose of leakage of medium. The opening of the pump port ring to protect the main parts of the pump is not the role of wear, wear in the mouth ring, you can repair or replace the new ring, to restore the normal assembly clearance, so that both the economy and ease of maintenance.
In the opening of the pump port and the integrity of the impeller and its radial clearance with the impeller, the removal of the pump should be the first check. If the pump in the open mouth ring has grooves and other defects or ruptured or by more than the table value gap defined in 5, should be replaced with new ring or the original ring welding repair.
Open pump mouth ring material has cast iron, cast steel and stainless steel three kinds of materials, generally according to different needs or use conditions to determine the use of what type of mouth ring, what kind of material
www.wel-pumps.com
Key words: open pump, mouth ring, sealing ring
The role of the open pump mouth ring is formed between the impeller and the pump shell narrow, tortuous channel, to increase the flow resistance of the media, to reduce the purpose of leakage of medium. The opening of the pump port ring to protect the main parts of the pump is not the role of wear, wear in the mouth ring, you can repair or replace the new ring, to restore the normal assembly clearance, so that both the economy and ease of maintenance.
In the opening of the pump port and the integrity of the impeller and its radial clearance with the impeller, the removal of the pump should be the first check. If the pump in the open mouth ring has grooves and other defects or ruptured or by more than the table value gap defined in 5, should be replaced with new ring or the original ring welding repair.
Open pump mouth ring material has cast iron, cast steel and stainless steel three kinds of materials, generally according to different needs or use conditions to determine the use of what type of mouth ring, what kind of material
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What are the common water supply equipment on the market?
(1) high water tank. Automatic sprinkler system using a temporary high-pressure water supply system, should set up the high fire water tank, the water storage should be 10min fire water, fire water tank water supply system should meet the nozzles at the most unfavorable point of the minimum working pressure and water density.
The building height not more than 24m, and set the dry wet system, system or preaction system according to the light danger level or dangerous level places, such as setting a high water tank is difficult, should use the 5L/s flow of the air pressure water supply equipment with water supply at the early stage of 10min.
The water pump a system, should be independent, and should be a preparation or a preparation will set the standby pump ratio.
B, according to the two load power supply of the building, it is appropriate to use the diesel pump as a standby pump.
C, the system of water supply pump, pressure regulator pump, should use the self irrigation water absorption method. When using natural water, the water pump should take measures to prevent the blockage of the debris.
4) each water supply pump should not be less than 2. The alarm system is provided with an annular pipeline valve population before each water pump outlet pipe should not be less than 2. Water pump water supply pipe should be set up control valve control valve, outlet pipe should be set up; check valve water valve, pressure gauge and a diameter not less than 65mm. When necessary, should take measures to control the outlet pressure of the water supply pump.
(3) fire pool. Fire water pool is used for indoor fire protection in the absence of outdoor fire source. Fire water tank can be arranged on the outdoor underground or on the ground, or in the basement or indoor, and indoor swimming pool, pool and waterscape. Fire water tank shall be provided with a water level control valve of the water inlet pipe and an overflow pipe, vent pipe, drain pipe, a water outlet pipe and a water level indicator and other ancillary equipment. According to the requirements of water quality of all kinds of water system, the fire pool and the life or production of water storage
(4) air pressure water supply equipment or regulated water pump. Air pressure water supply equipment is based on Boyle's law, that is: under constant temperature conditions, the absolute pressure of a certain quality gas and its volume is inversely proportional to the principle of manufacturing. It uses the pressure of the compressed air in the airtight tank to change, adjust and pressure water supply, in the water supply system, mainly from the role of pressure and water regulation.
When the high water tank can not meet the building, the most unfavorable point of the construction of automatic water spray fire extinguishing system, should be set pressure water supply equipment, such as pressure pumps and other booster facilities
The building height not more than 24m, and set the dry wet system, system or preaction system according to the light danger level or dangerous level places, such as setting a high water tank is difficult, should use the 5L/s flow of the air pressure water supply equipment with water supply at the early stage of 10min.
The water pump a system, should be independent, and should be a preparation or a preparation will set the standby pump ratio.
B, according to the two load power supply of the building, it is appropriate to use the diesel pump as a standby pump.
C, the system of water supply pump, pressure regulator pump, should use the self irrigation water absorption method. When using natural water, the water pump should take measures to prevent the blockage of the debris.
4) each water supply pump should not be less than 2. The alarm system is provided with an annular pipeline valve population before each water pump outlet pipe should not be less than 2. Water pump water supply pipe should be set up control valve control valve, outlet pipe should be set up; check valve water valve, pressure gauge and a diameter not less than 65mm. When necessary, should take measures to control the outlet pressure of the water supply pump.
(3) fire pool. Fire water pool is used for indoor fire protection in the absence of outdoor fire source. Fire water tank can be arranged on the outdoor underground or on the ground, or in the basement or indoor, and indoor swimming pool, pool and waterscape. Fire water tank shall be provided with a water level control valve of the water inlet pipe and an overflow pipe, vent pipe, drain pipe, a water outlet pipe and a water level indicator and other ancillary equipment. According to the requirements of water quality of all kinds of water system, the fire pool and the life or production of water storage
(4) air pressure water supply equipment or regulated water pump. Air pressure water supply equipment is based on Boyle's law, that is: under constant temperature conditions, the absolute pressure of a certain quality gas and its volume is inversely proportional to the principle of manufacturing. It uses the pressure of the compressed air in the airtight tank to change, adjust and pressure water supply, in the water supply system, mainly from the role of pressure and water regulation.
When the high water tank can not meet the building, the most unfavorable point of the construction of automatic water spray fire extinguishing system, should be set pressure water supply equipment, such as pressure pumps and other booster facilities
11/10/2016
Method for reducing sealing temperature of centrifugal pump
Reduce the centrifugal pump sealing temperature is to improve the work efficiency and the service life of the centrifugal pump only measures, how to effectively reduce the sealing temperature of centrifugal pump, we look at here is how to express the.
Sealing structure of centrifugal pump
1, single face seal of centrifugal pump: the injection type flushing, flushing line is about 100 degrees less liquid wax, high pressure ratio sealing cavity 0.05~0.15Mpa. The gland with hot water (water quench). General can use a cycle (ten months).
2, centrifugal pump metal bellows seal: compact structure, easy to install, in the case of the same auxiliary system, the life of the ordinary seal 2~3 times.
3, centrifugal pump double end face machine: the use of circular flushing, plus external cooling, life is 1.5~2 times the single end face.
4, centrifugal pump friction pairs of hard to hard (SiC/SiC, YG6/YG8, etc.), high viscosity, containing a small amount of solid particles of the medium or have a crystal produced medium, has a very good effect.
Two, the cooling form of centrifugal pump:
1, domestic centrifugal pump set of cooling water in the seal cavity around the cooling with cold water, which makes the seal cavity temperature down to 200~250 DEG C.
2, the single seal, using the injection washing, cleaning, leading from the outside temperature is about 100 DEG C oil (diesel diesel is generally not, because the product, not only reduces the temperature), and improve the working environment, is the effective way to.
3, the gland with chilled water; in addition to lower temperature, also can prevent water pipeline blockage.
In the actual operation, in accordance with the above requirements and then combined with the actual working environment to effectively carry out the centrifugal pump seal temperature reduction.
Welpump will be the spirit of "quality first, technology first, customer first, honesty first" principle, for domestic and foreign companies to provide advanced technology services and high-quality products.
Sealing structure of centrifugal pump
1, single face seal of centrifugal pump: the injection type flushing, flushing line is about 100 degrees less liquid wax, high pressure ratio sealing cavity 0.05~0.15Mpa. The gland with hot water (water quench). General can use a cycle (ten months).
2, centrifugal pump metal bellows seal: compact structure, easy to install, in the case of the same auxiliary system, the life of the ordinary seal 2~3 times.
3, centrifugal pump double end face machine: the use of circular flushing, plus external cooling, life is 1.5~2 times the single end face.
4, centrifugal pump friction pairs of hard to hard (SiC/SiC, YG6/YG8, etc.), high viscosity, containing a small amount of solid particles of the medium or have a crystal produced medium, has a very good effect.
Two, the cooling form of centrifugal pump:
1, domestic centrifugal pump set of cooling water in the seal cavity around the cooling with cold water, which makes the seal cavity temperature down to 200~250 DEG C.
2, the single seal, using the injection washing, cleaning, leading from the outside temperature is about 100 DEG C oil (diesel diesel is generally not, because the product, not only reduces the temperature), and improve the working environment, is the effective way to.
3, the gland with chilled water; in addition to lower temperature, also can prevent water pipeline blockage.
In the actual operation, in accordance with the above requirements and then combined with the actual working environment to effectively carry out the centrifugal pump seal temperature reduction.
Welpump will be the spirit of "quality first, technology first, customer first, honesty first" principle, for domestic and foreign companies to provide advanced technology services and high-quality products.
Submersible pump (deep well submersible pump) installation method
Submersible pump and installation:
Well with submersible pump (submersible pump) under general wells installed in two ways: one is the head is very low (generally less than 30m) of the submersible pump can be installed using the hose; and high lift (generally above 30m) the submersible pump should be used in pipe installation.
1, the use of hose under the installation
The submersible electric pump which is installed under the well of the soft pipe can be directly used for hoisting the rope (such as nylon rope, etc.) which can bear the full weight of the water in the submersible electric pump and the water pipe and the water pipe and the water pipe and the water pipe.
2, the use of steel pipe under the installation
The installation of the steel pipe under the well with submersible electric pump, the installation method as shown in fig..
1) with clamp wells with submersible pump submersible pump part of the Swiss, and the chain hoist, slowly, well, until the clamps our resting on the wellhead, remove the chain.
2) with another pay clamp of a connecting pipe, flange connecting pipe distance 15cm with chain hoist, slowly down. Connecting pipe to the blue and submersible pump flange gasket between the good rubber gasket, bolts, nuts and spring washers will be connected to the pipe flange and submersible electric pump flange evenly forced tightening.
3) the submersible pump slightly lifted, remove the clamp at the upper end of the submersible pump, and use plastic tape or cable to connect cable card will fasten the hose, slowly under the hoop firmly resting on the wellhead.
4) with the same method, all the water pipes connected to the submersible pump, and human wells.
5) the submersible pump out cable access control switch, and then connected three-phase power supply.
Well with submersible pump (submersible pump) under general wells installed in two ways: one is the head is very low (generally less than 30m) of the submersible pump can be installed using the hose; and high lift (generally above 30m) the submersible pump should be used in pipe installation.
1, the use of hose under the installation
The submersible electric pump which is installed under the well of the soft pipe can be directly used for hoisting the rope (such as nylon rope, etc.) which can bear the full weight of the water in the submersible electric pump and the water pipe and the water pipe and the water pipe and the water pipe.
2, the use of steel pipe under the installation
The installation of the steel pipe under the well with submersible electric pump, the installation method as shown in fig..
1) with clamp wells with submersible pump submersible pump part of the Swiss, and the chain hoist, slowly, well, until the clamps our resting on the wellhead, remove the chain.
2) with another pay clamp of a connecting pipe, flange connecting pipe distance 15cm with chain hoist, slowly down. Connecting pipe to the blue and submersible pump flange gasket between the good rubber gasket, bolts, nuts and spring washers will be connected to the pipe flange and submersible electric pump flange evenly forced tightening.
3) the submersible pump slightly lifted, remove the clamp at the upper end of the submersible pump, and use plastic tape or cable to connect cable card will fasten the hose, slowly under the hoop firmly resting on the wellhead.
4) with the same method, all the water pipes connected to the submersible pump, and human wells.
5) the submersible pump out cable access control switch, and then connected three-phase power supply.
11/09/2016
Artificial falls under the condition of the pump selection
Waterfall with a submersible pump, head to determine the height of the waterfall, flow determines the size of the waterfall. Of course, can be selected according to the site conditions of the flow and head of the centrifugal pump.
The basic structure is composed of artificial waterfall waterfall water reservoir, water weir, waterfall bottom lining, waterfall waterfall pool or body, bearing a circulating water tank, circulating pump, water purification equipment, circulation pipeline system and lighting lights and other components, as shown in Figure 2 2-4.
The difference between the water drop height or call drop, see Figure 2 in 2-4 H.
1 water tanks
Artificial waterfall size depends on the size of the falls reservoir. By the use of circulating water, the water storage volume is relatively small, the smaller waterfall, the circulation pipe wear alone L tube as the water falls.
2 weir mouth
The main form of the weir mouth is wide crest weir. Can be divided into natural waterfall fall into the water, the rules of the mouth of the weir and the twists and turns of the weir. No matter what form of the weir mouth, must be strictly level.
3 waterfall bottom lining
Falls from the mouth of the weir overflow, followed by the bottom line of the waterfall. The material of the waterfall bottom lining can be made of concrete, granite, glass curtain wall or stone. In order to make the water flow more dynamic, the refraction of light and the change of the shape of the water, the bottom lining of the waterfall can be made into a broken line shape, and a rough concave and convex; or a convex block is inlaid on the bottom lining. According to the stone play different roles, known as the mirror refraction of light stone, stone, water diversion cutting flow and broken stones and a falling water and meet the ultra energy dissipation effect of bearing waterfall stone.
4 waterfall body
The water formed from the water weir overflow water called Waterfall body. The waterfall was drowning weir shape and the influence of different substrates to form different waterfall, waterfall body form in the dropping process.
5 bearing waterfall pool
The waterfall is specially called Waterfall recycling pool.
The waterfall pool is the role of the whereabouts of the waterfall of water, and the energy dissipation effect; the waterfall formed reflection, abundant water, enhanced momentum. In the waterfall pool can be concealed lighting lights, circulating water pumps and water pipes.
6 circulating water pump and circulating water pipe system
The water must be recycled artificial waterfalls, circulating water pump submersible pump commonly used directly mounted on the bearing hidden waterfall pool towel. Flow and lift submersible pump to the hydraulic calculation, the waterfall flow and drop height to meet the needs of.
The circulating pipeline system comprises a water delivery pipe and a perforated pipe. The perforated pipe in the water tank of concealed laying, perforated pipe length equal to the width of the LJ weir.
7 water purification equipment
Falls in the process of recycling, by light or sunlight, dust, impurities, ground base materials such as pollution, the main pollutants are inorganic algae, suspended solids and bacteria, need regular cleaning treatment and disinfection.
8 lighting lanterns
Lighting lanterns are mounted on the bearing of the hidden waterfall pool below the surface, for night lighting, the rich and colorful waterfall.
The basic structure is composed of artificial waterfall waterfall water reservoir, water weir, waterfall bottom lining, waterfall waterfall pool or body, bearing a circulating water tank, circulating pump, water purification equipment, circulation pipeline system and lighting lights and other components, as shown in Figure 2 2-4.
The difference between the water drop height or call drop, see Figure 2 in 2-4 H.
1 water tanks
Artificial waterfall size depends on the size of the falls reservoir. By the use of circulating water, the water storage volume is relatively small, the smaller waterfall, the circulation pipe wear alone L tube as the water falls.
2 weir mouth
The main form of the weir mouth is wide crest weir. Can be divided into natural waterfall fall into the water, the rules of the mouth of the weir and the twists and turns of the weir. No matter what form of the weir mouth, must be strictly level.
3 waterfall bottom lining
Falls from the mouth of the weir overflow, followed by the bottom line of the waterfall. The material of the waterfall bottom lining can be made of concrete, granite, glass curtain wall or stone. In order to make the water flow more dynamic, the refraction of light and the change of the shape of the water, the bottom lining of the waterfall can be made into a broken line shape, and a rough concave and convex; or a convex block is inlaid on the bottom lining. According to the stone play different roles, known as the mirror refraction of light stone, stone, water diversion cutting flow and broken stones and a falling water and meet the ultra energy dissipation effect of bearing waterfall stone.
4 waterfall body
The water formed from the water weir overflow water called Waterfall body. The waterfall was drowning weir shape and the influence of different substrates to form different waterfall, waterfall body form in the dropping process.
5 bearing waterfall pool
The waterfall is specially called Waterfall recycling pool.
The waterfall pool is the role of the whereabouts of the waterfall of water, and the energy dissipation effect; the waterfall formed reflection, abundant water, enhanced momentum. In the waterfall pool can be concealed lighting lights, circulating water pumps and water pipes.
6 circulating water pump and circulating water pipe system
The water must be recycled artificial waterfalls, circulating water pump submersible pump commonly used directly mounted on the bearing hidden waterfall pool towel. Flow and lift submersible pump to the hydraulic calculation, the waterfall flow and drop height to meet the needs of.
The circulating pipeline system comprises a water delivery pipe and a perforated pipe. The perforated pipe in the water tank of concealed laying, perforated pipe length equal to the width of the LJ weir.
7 water purification equipment
Falls in the process of recycling, by light or sunlight, dust, impurities, ground base materials such as pollution, the main pollutants are inorganic algae, suspended solids and bacteria, need regular cleaning treatment and disinfection.
8 lighting lanterns
Lighting lanterns are mounted on the bearing of the hidden waterfall pool below the surface, for night lighting, the rich and colorful waterfall.
11/08/2016
Procurement knowledge of sewage pump
Sewage pump is a pump in the areas of the most widely used water irrigation, sewage discharge, industrial wastewater treatment, only if we understand the scope of sewage pump sewage pump, sewage pump characteristics and maintenance of common sense, can buy to let you create higher efficiency.
The scope of use of the sewage pump: the enterprise unit wastewater discharge. Urban sewage treatment plant discharge system. Subway, underground room, air defense system drainage station. The hospitals, hotels, high-rise building sewage discharge. The residentialsewagepumping station. The municipal engineering construction site in the mud, dilute emissions. Water supply device, tap water factory. The farms and rural sewage irrigation. To exploration and mining equipment for water treatment. The place of the shoulder arm, pumping mud.
The characteristics of the sewage pump adopts the unique leaf or double blade impeller structure, greatly improve the through capacity of sewage, which can effectively through 5 times of pump diameter and pump diameter solid particles 50%. Mechanical seal using a new type of hard corrosion-resistant tungsten carbide material, while the seal is improved to double end seal, so that it is in the oil chamber for a long time to run, can make the pump safe and continuous operation for more than 8000 hours. The compact structure, small volume, low noise, energy saving effect, convenient maintenance, no need of pump room, dive into the water to work, greatly reduce the project cost. The sealing oil pump is arranged inside the Water Leakage high-precision interference detection sensors, and embedded within the stator windings of the thermal components, the absolute protection of the pump motor. And according to user needs can be equipped with automatic safety protection control cabinet for the pump Water Leakage, leakage, overload and over temperature of absolute protection, improve the safety and reliability of the product. The float switch solution based on the required changes, automatic control of pump start and stop, without special care, it is very convenient to use. And according to user needs with double rail automatic coupling installation system, which brings great convenience to installation and maintenance, this may not enter the sewage pit. It can be used in the whole range of lift, while the motor is not overloaded. We have two different installation methods, fixed automatic coupling installation system, mobile free installation system.
The structure and performance of self-priming sewage pump sewage pump, learn the advantages of similar products at home and abroad, suggestions are provided and and absorption use requirements of the majority of users, to develop into a set of self suction and discharge in a can, like water self-priming pump that does not need safety valve, not need water, and aspirate containing big solid block, long fibers of dirt, sediment, mine waste contamination, waste treatment and sewage works all and colloidal liquid; according to the different ways of sewage pump sewage, sewage pump can be divided into Self-priming sewage pump, liquid sewage pump, sewage pump type knife and automatic mix sewage pump. Because it can transport with hard solids, fibers, liquid, and particularly dirty, sticky and slippery liquid, is widely used in mining, papermaking, printing and dyeing, environmental protection, oil refining, petroleum, chemical industry, farm, dyeing, wine, food, chemical fertilizer, coking plant, building, marble factory, mud, sand, mud, sewage pond, dirty liquid suction feeding sewage treatment thick liquid, filling and suspended matter in.
The selection and maintenance of sewage pump for sewage pump is the most critical issue is the reliability problem, because of the need of transmission medium of solid materials are mixed with liquid, the problem of the sewage pump in a sealed, motor bearing capacity, bearing arrangement and the use of requirements to be higher than the average pump, so in the selection, we must clearly understand the sewage pump sealing reliability and load capacity.
The scope of use of the sewage pump: the enterprise unit wastewater discharge. Urban sewage treatment plant discharge system. Subway, underground room, air defense system drainage station. The hospitals, hotels, high-rise building sewage discharge. The residentialsewagepumping station. The municipal engineering construction site in the mud, dilute emissions. Water supply device, tap water factory. The farms and rural sewage irrigation. To exploration and mining equipment for water treatment. The place of the shoulder arm, pumping mud.
The characteristics of the sewage pump adopts the unique leaf or double blade impeller structure, greatly improve the through capacity of sewage, which can effectively through 5 times of pump diameter and pump diameter solid particles 50%. Mechanical seal using a new type of hard corrosion-resistant tungsten carbide material, while the seal is improved to double end seal, so that it is in the oil chamber for a long time to run, can make the pump safe and continuous operation for more than 8000 hours. The compact structure, small volume, low noise, energy saving effect, convenient maintenance, no need of pump room, dive into the water to work, greatly reduce the project cost. The sealing oil pump is arranged inside the Water Leakage high-precision interference detection sensors, and embedded within the stator windings of the thermal components, the absolute protection of the pump motor. And according to user needs can be equipped with automatic safety protection control cabinet for the pump Water Leakage, leakage, overload and over temperature of absolute protection, improve the safety and reliability of the product. The float switch solution based on the required changes, automatic control of pump start and stop, without special care, it is very convenient to use. And according to user needs with double rail automatic coupling installation system, which brings great convenience to installation and maintenance, this may not enter the sewage pit. It can be used in the whole range of lift, while the motor is not overloaded. We have two different installation methods, fixed automatic coupling installation system, mobile free installation system.
The structure and performance of self-priming sewage pump sewage pump, learn the advantages of similar products at home and abroad, suggestions are provided and and absorption use requirements of the majority of users, to develop into a set of self suction and discharge in a can, like water self-priming pump that does not need safety valve, not need water, and aspirate containing big solid block, long fibers of dirt, sediment, mine waste contamination, waste treatment and sewage works all and colloidal liquid; according to the different ways of sewage pump sewage, sewage pump can be divided into Self-priming sewage pump, liquid sewage pump, sewage pump type knife and automatic mix sewage pump. Because it can transport with hard solids, fibers, liquid, and particularly dirty, sticky and slippery liquid, is widely used in mining, papermaking, printing and dyeing, environmental protection, oil refining, petroleum, chemical industry, farm, dyeing, wine, food, chemical fertilizer, coking plant, building, marble factory, mud, sand, mud, sewage pond, dirty liquid suction feeding sewage treatment thick liquid, filling and suspended matter in.
The selection and maintenance of sewage pump for sewage pump is the most critical issue is the reliability problem, because of the need of transmission medium of solid materials are mixed with liquid, the problem of the sewage pump in a sealed, motor bearing capacity, bearing arrangement and the use of requirements to be higher than the average pump, so in the selection, we must clearly understand the sewage pump sealing reliability and load capacity.
11/07/2016
Analysis and application of the material in the water outlet pipe of the pump
After the exit of the pipeline for the water pipeline, also known as the pressure water pipeline. The outlet pipeline is reinforced concrete pipe, steel pipe, cast iron pipe and PVC pipe, etc.. According to the level of pressure, diameter, construction conditions, the performance characteristics of the combination of various pipes to determine the water pipe material.
1, water pump pipe material reinforced concrete pipe
An ordinary reinforced concrete pipe, a prestressed reinforced concrete pipe. Ordinary steel strength concrete has the advantages of low cost, long service life, low maintenance cost and high water transfer efficiency. The advantages of prestressed reinforced concrete pipe is saving steel, anti permeability, water efficiency, bear the water pressure. The two point is to attack Wu dance pipe weight, transportation and convenient installation, the interface processing difficulties. Ordinary reinforced concrete pipe is suitable for all kinds of pumping stations under the head of 50m, the pipe diameter is 30 - 150mm pipeline; prestressed reinforced concrete pipe is suitable for high lift pumping station, pipe diameter is less than 200mm.
2, water pump pipe material steel pipe
Steel pipe has the advantages of thin wall, light weight, high strength; bear the water pressure, water efficiency, pipe length, simple joint. The disadvantage is that the cost is high, easy to corrosion, the use of anti-corrosion materials to be coated in the surface. Suitable for high lift pump station. The diameter of the pipe is larger than 800mm.
3, water pump pipe material cast iron pipe
Cast iron pipe has the advantages of low cost than the steel pipe, not easy to corrosion, long life, the disadvantage is the tube wall thickness, weight, material brittle head loss is big, not easy maintenance, etc.. Suitable for medium lift pump station, pump pipe with diameter less than 600mm.
1, water pump pipe material reinforced concrete pipe
An ordinary reinforced concrete pipe, a prestressed reinforced concrete pipe. Ordinary steel strength concrete has the advantages of low cost, long service life, low maintenance cost and high water transfer efficiency. The advantages of prestressed reinforced concrete pipe is saving steel, anti permeability, water efficiency, bear the water pressure. The two point is to attack Wu dance pipe weight, transportation and convenient installation, the interface processing difficulties. Ordinary reinforced concrete pipe is suitable for all kinds of pumping stations under the head of 50m, the pipe diameter is 30 - 150mm pipeline; prestressed reinforced concrete pipe is suitable for high lift pumping station, pipe diameter is less than 200mm.
2, water pump pipe material steel pipe
Steel pipe has the advantages of thin wall, light weight, high strength; bear the water pressure, water efficiency, pipe length, simple joint. The disadvantage is that the cost is high, easy to corrosion, the use of anti-corrosion materials to be coated in the surface. Suitable for high lift pump station. The diameter of the pipe is larger than 800mm.
3, water pump pipe material cast iron pipe
Cast iron pipe has the advantages of low cost than the steel pipe, not easy to corrosion, long life, the disadvantage is the tube wall thickness, weight, material brittle head loss is big, not easy maintenance, etc.. Suitable for medium lift pump station, pump pipe with diameter less than 600mm.
How to install and pay attention to the booster pump?
Butt line and fixed pump
1, ready to annex. In order to facilitate the installation, commissioning and maintenance of the booster pump, the pipe valve accessories should be prepared, the specific name, quantity and use are as follows:
Valve * 2, each with a valve in the water, in order to repair and debug. There is no pressure control device installed, the water inlet and outlet valve can also adjust the flow and pressure.
Flexible soft ground * 2, the import and export of water each with a soft, in order to prevent the processing pipeline error caused by the installation of difficult, but also can be convenient for the maintenance of the back of the dismantling machine.
Y type filter * 1, attached to the water inlet of the booster pump, prevent the impurities into the water pump pump damage.
The pressure gauge is 2, in which the water inlet and outlet are filled with a water inlet pressure gauge is designed to observe the water source and the water outlet pressure gauge is designed to observe the pressure of the water.
A * 2 flange or the pump flange, butt for flange connection, threaded connection for slipknot pump docking.
Flange gasket for flange connection sealing.
Screw for flange connection fastening.
One way valve * 1, if it is automatic booster pump, you do not need to prepare a one-way valve. Check valve to prevent backflow of water into the water outlet.
2, start docking pipeline. The attachment is ready, just need to follow the following diagram turn from being connected to the water outlet pipe. Pay attention to the direction of water inlet and outlet is not installed.
How to install and pay attention to the booster pump?
Two, motor wiring
1, automatic booster pump. If your booster pump has been brought with the automatic control device, generally only need to follow the instructions of the drawings connected to the external power supply + ground to the control box corresponding to the port, the motor line is generally have received good. If the signal line is split, then the pressure sensor signal line should pay attention to the order, the order of the feedback signal can not be correctly. Pressure transmitter wiring is relatively simple, generally red line is connected to the power supply terminal 24V, black ACI can be. Remote pressure gauge has three lines (10V, public power supply terminal, signal feedback), because each remote pressure gauge order is not necessarily the same, there is no detailed remote pressure gauge connection, if you have this need, you can consult our.
2, non automatic booster pump. If you only need a booster pump to manually start up, the connection is also very simple. Only need to use high-quality standard four core copper wire in accordance with the correct access method (motor junction box inside the diagram) received motor junction box inside. Single phase to the zero line and the line of fire to the corresponding position, do not need to change the wiring column. The three-phase motor, if the power is less than 2.2Kw, using the Y connection; power >2.2Kw, using delta connection method. Motor junction boxes are marked.
Three, the fixed anchor screw pump.
If there is no pre buried, need to be installed after the pump with the impact of drilling holes with the expansion screws can be used.
1, ready to annex. In order to facilitate the installation, commissioning and maintenance of the booster pump, the pipe valve accessories should be prepared, the specific name, quantity and use are as follows:
Valve * 2, each with a valve in the water, in order to repair and debug. There is no pressure control device installed, the water inlet and outlet valve can also adjust the flow and pressure.
Flexible soft ground * 2, the import and export of water each with a soft, in order to prevent the processing pipeline error caused by the installation of difficult, but also can be convenient for the maintenance of the back of the dismantling machine.
Y type filter * 1, attached to the water inlet of the booster pump, prevent the impurities into the water pump pump damage.
The pressure gauge is 2, in which the water inlet and outlet are filled with a water inlet pressure gauge is designed to observe the water source and the water outlet pressure gauge is designed to observe the pressure of the water.
A * 2 flange or the pump flange, butt for flange connection, threaded connection for slipknot pump docking.
Flange gasket for flange connection sealing.
Screw for flange connection fastening.
One way valve * 1, if it is automatic booster pump, you do not need to prepare a one-way valve. Check valve to prevent backflow of water into the water outlet.
2, start docking pipeline. The attachment is ready, just need to follow the following diagram turn from being connected to the water outlet pipe. Pay attention to the direction of water inlet and outlet is not installed.
How to install and pay attention to the booster pump?
Two, motor wiring
1, automatic booster pump. If your booster pump has been brought with the automatic control device, generally only need to follow the instructions of the drawings connected to the external power supply + ground to the control box corresponding to the port, the motor line is generally have received good. If the signal line is split, then the pressure sensor signal line should pay attention to the order, the order of the feedback signal can not be correctly. Pressure transmitter wiring is relatively simple, generally red line is connected to the power supply terminal 24V, black ACI can be. Remote pressure gauge has three lines (10V, public power supply terminal, signal feedback), because each remote pressure gauge order is not necessarily the same, there is no detailed remote pressure gauge connection, if you have this need, you can consult our.
2, non automatic booster pump. If you only need a booster pump to manually start up, the connection is also very simple. Only need to use high-quality standard four core copper wire in accordance with the correct access method (motor junction box inside the diagram) received motor junction box inside. Single phase to the zero line and the line of fire to the corresponding position, do not need to change the wiring column. The three-phase motor, if the power is less than 2.2Kw, using the Y connection; power >2.2Kw, using delta connection method. Motor junction boxes are marked.
Three, the fixed anchor screw pump.
If there is no pre buried, need to be installed after the pump with the impact of drilling holes with the expansion screws can be used.
11/06/2016
Analysis of the advantages of rubber bearings in submersible sewage pump
For most of the submersible sewage pump, the bearings are used in rubber material. Because most of the submersible sewage pump has the phenomenon of reflux, the domestic submersible sewage pump has been low efficiency, high cost and poor performance of anti sediment. As is known to all, the bearing and shaft of submersible sewage pump are very easy to be worn, so that the life of submersible sewage pump is reduced. Therefore, a new type of anti sediment and can overcome the diversion tank backflow, and submersible pump can solve the high cost and low efficiency, and operation of submersible pump, submersible pump shaft bearing wear rubber bearings is an urgent technical problem.
In order to solve the technical problem, a bearing body is composed of an inner surface is provided with a guide groove formed at the upper end of the bearing body is provided with a sealing ring, casting body sealing ring and the bearing body for the same material, the inner diameter of the seal ring is slightly smaller than the inner diameter of the bearing body, and the outer peripheral surface for sealing ring the conical surface, the inner peripheral surface of the submersible pump set rubber bearing has an annular dovetail groove appeared in people's field of vision.
Compared with the prior art, the rubber bearing of the submersible sewage pump solves the reflux phenomenon of the diversion groove, and simultaneously solves the problems of low efficiency, high cost operation of the submersible pump and the bearing and shaft wear of the submersible pump. Experimental results show that the submersible sewage pump flow, head, respectively, to improve the 1%-2%, can make the original design of the pump efficiency increased by 1.5%-3%. The submersible sewage pump rubber bearing not only greatly reduces the energy consumption, but also greatly reduces the axial force of pump, but also greatly reduce the friction of motor thrust bearing and the motor, and prolongs the service life of about 1 times.
In order to solve the technical problem, a bearing body is composed of an inner surface is provided with a guide groove formed at the upper end of the bearing body is provided with a sealing ring, casting body sealing ring and the bearing body for the same material, the inner diameter of the seal ring is slightly smaller than the inner diameter of the bearing body, and the outer peripheral surface for sealing ring the conical surface, the inner peripheral surface of the submersible pump set rubber bearing has an annular dovetail groove appeared in people's field of vision.
Compared with the prior art, the rubber bearing of the submersible sewage pump solves the reflux phenomenon of the diversion groove, and simultaneously solves the problems of low efficiency, high cost operation of the submersible pump and the bearing and shaft wear of the submersible pump. Experimental results show that the submersible sewage pump flow, head, respectively, to improve the 1%-2%, can make the original design of the pump efficiency increased by 1.5%-3%. The submersible sewage pump rubber bearing not only greatly reduces the energy consumption, but also greatly reduces the axial force of pump, but also greatly reduce the friction of motor thrust bearing and the motor, and prolongs the service life of about 1 times.
Cause submersible sewage pump does not move the reasons
The purchase of new submersible sewage pump or in use will inevitably encounter the submersible pump does not turn the phenomenon, and the phenomenon encountered do not know what is the reason the submersible pump does not turn the following for you to share about the causes of all kinds of submersible pumps turn not to move:
1, submersible pump does not turn there may be: sewage pump use if it is jywq with stirring function, is likely to be the delivery of liquid which contains fiber or other debris around the impeller above or blockage to the pump body inside, causing the submersible sewage pump does not turn the phenomenon.
2, submersible pump does not turn there may be the sewage pumping liquid is corrosive of ordinary cast iron is easy to corrode, corrosion after impeller nut loose, cause the impeller and the submersible pump body contact so that the submersible pump can not rotate, stainless steel submersible pump products suggested the use of stainless steel material production a.
3, submersible pump can not rotate but can also be caused by damage to the bearing of the submersible pump, the pump stuck and start the pump control cabinet will appear the phenomenon of the trip, it should be replaced with new bearings.
After 4, the replacement of the bearing or not to move the phenomenon, then why not turn the submersible pump and motor rotor of the submersible pump may be a problem, because the rotor diameter slightly rough point leads to the appearance of the submersible pump motor is difficult to rotate the phenomenon, this situation appears only to replace the motor the new rotor or the motor rotor and then to remove the old car out of 30 microns above the lathe can solve the submersible pump does not turn the phenomenon.
1, submersible pump does not turn there may be: sewage pump use if it is jywq with stirring function, is likely to be the delivery of liquid which contains fiber or other debris around the impeller above or blockage to the pump body inside, causing the submersible sewage pump does not turn the phenomenon.
2, submersible pump does not turn there may be the sewage pumping liquid is corrosive of ordinary cast iron is easy to corrode, corrosion after impeller nut loose, cause the impeller and the submersible pump body contact so that the submersible pump can not rotate, stainless steel submersible pump products suggested the use of stainless steel material production a.
3, submersible pump can not rotate but can also be caused by damage to the bearing of the submersible pump, the pump stuck and start the pump control cabinet will appear the phenomenon of the trip, it should be replaced with new bearings.
After 4, the replacement of the bearing or not to move the phenomenon, then why not turn the submersible pump and motor rotor of the submersible pump may be a problem, because the rotor diameter slightly rough point leads to the appearance of the submersible pump motor is difficult to rotate the phenomenon, this situation appears only to replace the motor the new rotor or the motor rotor and then to remove the old car out of 30 microns above the lathe can solve the submersible pump does not turn the phenomenon.
11/03/2016
Optimization design of mine submersible electric pump equipment
In order to solve the mine accident successfully using submersible pump for rescue and improve the application efficiency of electric submersible pump in the mine drainage system, starting from the actual situation of submersible pump, based on the analysis of the technology system of mine submersible pump, according to the specific problems of the proposed scheme a set of system, to improve the system of submersible pumps.
(1) the optimal design of mine submersible electric pump system. The mine submersible electric pump system includes two main components, one is the submersible motor, the other is a submersible pump. The research on the mine submersible electric pump is mainly aimed at the two subsystems of the submersible motor and the submersible pump. In our daily life as well as the use of fire protection work in water supply and drainage system of a super system is in a submersible pump, based on the theory of optimization design of submersible pump, needs to carry on the transformation and design of transition form, in order to improve the operation efficiency of submersible pump. The key to this design is the design of submersible motor and submersible pump.
(2) optimal design of mine submersible electric pump. Design of submersible pump includes pump and pump design. Among them, the pump design is located above the motor of the submersible pump, so in the process of mine operation in reducing submersible pump occupied the position of the design structure of the submersible pump is suitable for small operation of the submersible pump and the use of deep well submersible pump; on the other hand, the design of the pump under the finger the motor is below the submersible pump, and has two forms, which are built-in and external mounted electric pump; the liquid from the output structure, mounted in the first pass flow around a circular motor, the motor for cooling, and then from the pump outlet this kind of pump structure, has the advantages of preventing motor heating.
Optimal design of control system of mine submersible electric pump (3). The design of the control system of mine submersible electric pump is mainly used in the design of the measurement sensors and PLC control system. In the PLC control system, CPU is the main controller, other sensors and actuators play a role to help the control shaft, the design can be real-time control of the submersible pump, when the switch control submersible pump can operate the pump and pump control valve to control, that can be the submersible pump automatic conversion between serial and parallel.
In summary, the optimization design of mine submersible pump, need to switch the pump control valve according to the actual situation, to ensure that the submersible pump can be normal use, at the same time, let the submersible pump more scientific and reasonable application in mine water supply and drainage system and mine accident rescue work. This optimized design is conducive to improving the flow and head of the hydraulic model, so as to ensure the strength and safety performance of mine submersible pump, and meet the actual needs of the deep wells.
(1) the optimal design of mine submersible electric pump system. The mine submersible electric pump system includes two main components, one is the submersible motor, the other is a submersible pump. The research on the mine submersible electric pump is mainly aimed at the two subsystems of the submersible motor and the submersible pump. In our daily life as well as the use of fire protection work in water supply and drainage system of a super system is in a submersible pump, based on the theory of optimization design of submersible pump, needs to carry on the transformation and design of transition form, in order to improve the operation efficiency of submersible pump. The key to this design is the design of submersible motor and submersible pump.
(2) optimal design of mine submersible electric pump. Design of submersible pump includes pump and pump design. Among them, the pump design is located above the motor of the submersible pump, so in the process of mine operation in reducing submersible pump occupied the position of the design structure of the submersible pump is suitable for small operation of the submersible pump and the use of deep well submersible pump; on the other hand, the design of the pump under the finger the motor is below the submersible pump, and has two forms, which are built-in and external mounted electric pump; the liquid from the output structure, mounted in the first pass flow around a circular motor, the motor for cooling, and then from the pump outlet this kind of pump structure, has the advantages of preventing motor heating.
Optimal design of control system of mine submersible electric pump (3). The design of the control system of mine submersible electric pump is mainly used in the design of the measurement sensors and PLC control system. In the PLC control system, CPU is the main controller, other sensors and actuators play a role to help the control shaft, the design can be real-time control of the submersible pump, when the switch control submersible pump can operate the pump and pump control valve to control, that can be the submersible pump automatic conversion between serial and parallel.
In summary, the optimization design of mine submersible pump, need to switch the pump control valve according to the actual situation, to ensure that the submersible pump can be normal use, at the same time, let the submersible pump more scientific and reasonable application in mine water supply and drainage system and mine accident rescue work. This optimized design is conducive to improving the flow and head of the hydraulic model, so as to ensure the strength and safety performance of mine submersible pump, and meet the actual needs of the deep wells.
11/02/2016
Eight factors will affect the efficiency of water pump
Pump parameters are stable depends on the efficiency of its own, some of the high efficiency of the pump, but some of the efficiency of the pump is not satisfactory. Today we introduced the water pump efficiency depends on what factors, we summed up the technical staff of a total of eight, make it clear of these factors we use water pump or water pump are a great help.
1 water pump itself is the most fundamental efficiency of the impact. Under the same working conditions of the pump, the efficiency may be a difference of more than 15%.
2 the running condition of the water pump is lower than the rated condition of the pump, the pump efficiency is low and the energy consumption is high.
3 motor efficiency in the use of basic remain unchanged. Therefore, it is important to choose a high efficiency motor.
4 the influence of the water pump efficiency is mainly related to the design and manufacture quality. Pump selected, the late management of small.
5 hydraulic loss, including hydraulic friction and local resistance loss. After running a certain period of time, the impeller and guide vanes inevitably lead to the surface abrasion, the hydraulic loss increases, the hydraulic efficiency is reduced.
6 water pump volume loss, also known as leakage losses, including the impeller seal ring, the class, the axial force balance between the three kinds of leakage loss. Volume efficiency is not only related to the design and manufacture, but also with the management of the late. After running for a certain period of time, due to the friction between the components, the gap increases, the volume efficiency decreases.
7 as the filter cylinder block, intake and other causes of pipeline centrifugal pump and idling.
8 water pump before the start, the staff do not pay attention to the centrifugal pump start the preparatory work before the heating pump, plate pump, infusion pumps and other basic operating procedures are not complete, often caused by pump cavitation, causing the pump noise, vibration, low pump efficiency.
1 water pump itself is the most fundamental efficiency of the impact. Under the same working conditions of the pump, the efficiency may be a difference of more than 15%.
2 the running condition of the water pump is lower than the rated condition of the pump, the pump efficiency is low and the energy consumption is high.
3 motor efficiency in the use of basic remain unchanged. Therefore, it is important to choose a high efficiency motor.
4 the influence of the water pump efficiency is mainly related to the design and manufacture quality. Pump selected, the late management of small.
5 hydraulic loss, including hydraulic friction and local resistance loss. After running a certain period of time, the impeller and guide vanes inevitably lead to the surface abrasion, the hydraulic loss increases, the hydraulic efficiency is reduced.
6 water pump volume loss, also known as leakage losses, including the impeller seal ring, the class, the axial force balance between the three kinds of leakage loss. Volume efficiency is not only related to the design and manufacture, but also with the management of the late. After running for a certain period of time, due to the friction between the components, the gap increases, the volume efficiency decreases.
7 as the filter cylinder block, intake and other causes of pipeline centrifugal pump and idling.
8 water pump before the start, the staff do not pay attention to the centrifugal pump start the preparatory work before the heating pump, plate pump, infusion pumps and other basic operating procedures are not complete, often caused by pump cavitation, causing the pump noise, vibration, low pump efficiency.
Introduction of safety protection level of pump motor
Motor is an indispensable component of the pump, of course, in addition to the diesel engine pump. In general, we are in the procurement of the pump will be asked what the customer needs to be equipped with motor, visible motor for the importance of the pump, today we come to a simple introduction about the pump motor safety protection level.
Motor safety protection models are generally IP beginning, such as IP54, IP44 and so on, we will use the * No. instead of these two numbers, namely: IP**.
Protection level:
0 no protection motor, no special protection, no test, but should be in line with 2.1
1 protection larger than 50MM solid motor can prevent large area of the body accidentally accidentally touched or close to the shell charged or rotating parts. Can prevent the solid foreign body into the shell diameter greater than 50MM
2 protection is greater than 12MM solid motor can prevent the solid foreign body into the shell diameter greater than 12MM
3 Protection larger than 2.5MM solid motor can prevent the diameter of more than 2.5MM of the tool or wire touching or close to the shell charged or rotating parts
4 motor protection is greater than 1MM solid can prevent the diameter or thickness of more than 1MM wire or strip touching or near shell charged or rotating parts
5 dust motor bear in any direction should be no harmful effects of splash
6 dust completely prevent the intrusion of foreign objects, and can completely prevent dust from entering.
0 no special protection for non protective motor
1 drop motor vertical drop should have no harmful effects
215 degree drop motor when the motor from the normal position to any direction tilt to 15 degrees in any angle, vertical water dripping should have no harmful effect
3 water spraying motor and the vertical line into the 60 degree angle range of the water spray should have no harmful effects
4 splash proof motor under any direction splash should be no harmful effects
5 anti water jet motor to bear any direction of water spray should have no harmful effects
6 the motor's water intake should not be harmful to the extent that the motor's water intake should not be harmful when it is subjected to strong waves or strong water jet.
7 anti immersion motor when the motor immersed in the provisions of the pressure of the water after a specified time, the motor's water intake should not be harmful to the extent
8 submersible motor motor under the conditions specified in the plant can be long-term diving. Motor is generally water tight type, then to some type of motor can also be allowed to enter the water, but should not be harmful to the extent.
Motor safety protection models are generally IP beginning, such as IP54, IP44 and so on, we will use the * No. instead of these two numbers, namely: IP**.
Protection level:
0 no protection motor, no special protection, no test, but should be in line with 2.1
1 protection larger than 50MM solid motor can prevent large area of the body accidentally accidentally touched or close to the shell charged or rotating parts. Can prevent the solid foreign body into the shell diameter greater than 50MM
2 protection is greater than 12MM solid motor can prevent the solid foreign body into the shell diameter greater than 12MM
3 Protection larger than 2.5MM solid motor can prevent the diameter of more than 2.5MM of the tool or wire touching or close to the shell charged or rotating parts
4 motor protection is greater than 1MM solid can prevent the diameter or thickness of more than 1MM wire or strip touching or near shell charged or rotating parts
5 dust motor bear in any direction should be no harmful effects of splash
6 dust completely prevent the intrusion of foreign objects, and can completely prevent dust from entering.
0 no special protection for non protective motor
1 drop motor vertical drop should have no harmful effects
215 degree drop motor when the motor from the normal position to any direction tilt to 15 degrees in any angle, vertical water dripping should have no harmful effect
3 water spraying motor and the vertical line into the 60 degree angle range of the water spray should have no harmful effects
4 splash proof motor under any direction splash should be no harmful effects
5 anti water jet motor to bear any direction of water spray should have no harmful effects
6 the motor's water intake should not be harmful to the extent that the motor's water intake should not be harmful when it is subjected to strong waves or strong water jet.
7 anti immersion motor when the motor immersed in the provisions of the pressure of the water after a specified time, the motor's water intake should not be harmful to the extent
8 submersible motor motor under the conditions specified in the plant can be long-term diving. Motor is generally water tight type, then to some type of motor can also be allowed to enter the water, but should not be harmful to the extent.
Introduction of the working conditions of the pump
Each pump has a performance curve, the curve is reflected in a certain speed, such as 2900 or 1450 or 800 rpm, each speed, it is not the same curve. The performance curve reflects the potential working ability of the pump itself. However, when used to play the effect of the water pump to pump outlet with pipe to bring water to the height and is not connected to the pipeline numerical spray can mark the lift pump nameplate. Then, for a specific pump system, the pump in the performance curve which point of work, which is to determine the pump operating point of the problem.
What is the pump operating point?
Pump operation refers to the actual amount of water pump operation, Q, H, N, head of shaft power efficiency n, these values are painted on the head curve and efficiency curve of power, has become a specific point, this point is called the pump operating point. The working condition of the pump reflects the instantaneous working condition of the pump.
In addition to the ability of the pump itself, the specific location of the pump operating point is also determined by other factors. There are two aspects to determine the pump operating point:
The inherent pump working ability; pump working environment, such as all the sewage pump products conveying sewage operating point is based on the calculation of the water piping system, the boundary conditions of pump and the arrangement of the pool, water level changes etc..
http://www.wel-pumps.com
What is the pump operating point?
Pump operation refers to the actual amount of water pump operation, Q, H, N, head of shaft power efficiency n, these values are painted on the head curve and efficiency curve of power, has become a specific point, this point is called the pump operating point. The working condition of the pump reflects the instantaneous working condition of the pump.
In addition to the ability of the pump itself, the specific location of the pump operating point is also determined by other factors. There are two aspects to determine the pump operating point:
The inherent pump working ability; pump working environment, such as all the sewage pump products conveying sewage operating point is based on the calculation of the water piping system, the boundary conditions of pump and the arrangement of the pool, water level changes etc..
http://www.wel-pumps.com
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