The main use of submersible pumps
What do you know about submersible pumps? If you are constantly concerned about the news of our website, I believe there are many friends are not unfamiliar, today we will introduce the main use of submersible pump! Hope we do more understanding, to bring you the convenience of life. The use of the following:
1.Vertical use, such as in the general wells;
2.Inclined use, such as in the mine slope of the road;
3.Horizontal use, such as in the pool to use.
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Submersible pump start device
Simple submersible pump also has a lot of species and shape, it is also a fashionable object. Submersible pump start device mainly Y-type star delta starter start device, direct start device, auto-step-down start device, variable frequency step-down device these four. So what about their function? Then look at your introduction below.
1.Y-type star delta buck starting device
This is a large power submersible pump, can be run in the overload, stall and undervoltage and other abnormal operating conditions to protect, can also be based on changes in pressure or level of automatic control of submersible pump operation, and Equipped with stator winding overheating, bearing overheating, motor or oil indoor water and other special protection.
2.Direct start device
It is used for low-power submersible motor and submersible pump, starting device by the contactor, relays and other components, can be equipped with stator winding overheating protection.
3.Auto-step-down start device
This device can be on the submersible motor and submersible pump step-down start, starting device in addition to contactors, relays and other components, the control panel and equipped with a self-lotus transformer. Its function to the first two devices are equipped with the function.
4.Variable frequency step-down start device
Its function is that the water supply system can automatically adjust the system water supply pressure, so that the water supply pressure to maintain a constant, to avoid the water pressure fluctuations. Using the inverter device soft start, eliminating the start of the impact of the current, extending the service life of the device. The water supply system will automatically adjust the speed of the submersible pump and the number of running units according to the set pressure, so that the water supply system can be operated in the energy efficient optimization state.
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Submersible pump clear hole technology
In submersible pump design, clear hole technology is a very important work. How to master its clear hole technology, the following for everyone to elaborate:
Submersible pump clear hole technology mainly draws on the gas lift type reverse rotation rotary drilling mud removal system. Due to the use of impact drilling machine into the hole, so the water pile mud requirements are not very high, are piling the process of self-made mud, but also because after the hole has been used to dig the large diameter particles have been excluded, so you can do the mud sucking jobs. The depth of the hose in the catheter connected to the conduit should be greater than 1.5 times the height of the head in the borehole to the mouth, and the duct is about 20-30 cm from the bottom of the hole.
Through the submersible pump on the vacuum suction of the mud, reducing the water level within the catheter, because the catheter and the water level within the pile to form a connector, so that the water quickly from the bottom of the catheter flock to the catheter, so that through the catheter hole on the pile bottom layer Upward pressure, the bottom of the pile into the catheter into the catheter and then into the rubber tube, and finally discharged by the submersible pump.
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How to extend the use of submersible pumps
Pump impeller and drive the impeller motor are sneaking into the water to work in a submersible pump, submersible pump is divided into deep well and operating surface.
In the use of submersible pumps should be high-definition motor rotation direction, and now there are many types of submersible pump forward and reverse are likely to water, but the reverse of the water is small, the current is large, reverse the time Long after the damage will be the corresponding motor winding. Submersible pump the mortgage power supply line is relatively long, 
the line terminal voltage is too low is often. When the voltage and the line voltage is lower than the corresponding voltage, the submersible pump motor speed decreases, when less than the required speed, start the centrifugal switch will be other, resulting in a long time to start the winding power and heat Burn the corresponding windings and capacitors. The voltage is too high will burn out, in the operation must be observed at any time the corresponding power supply voltage value, abnormal after the motor should immediately stop rotating, find out the cause and troubleshooting.
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Inside and outside of submersible pump are different
Submersible pump is characterized by built-in submersible pumps and exterior submersible pumps, then what different places do they have to make people distinguish it out.
Built-in submersible pump, which in the motor base outside another electric pump shell to surround it, the motor base and the pump shell can be made into one, into a ring structure, and then install the pump outlet cover. The liquid flows through the circular space between the submersible pump housing and the motor base, and then cools the surface of the motor base directly and flows out through the aqueduct. Built-in submersible pump motor cooling effect is better, suitable for large areas of the ground in the occasion, long-term use of good results, high reliability.
Outside submersible pump, installed in the motor outside the water pipe as a water flow, the liquid directly from the pump connected to the drainage pipe, not through the motor surface, its cooling than the built-in submersible pump to be worse.
In summary, the difference between built-in and exterior submersible pumps is also very large and can be easily identified. Due to the poor cooling performance of the exterior submersible pump, it needs to be improved and made it in a large area Drain, the motor exposed to the surface, the cooling effect becomes better.
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Prevent submersible pump malfunction
Submersible pump is an important equipment for deep wells, the whole unit should be submerged into the water. But what are the problems with submersible pumps?
Submersible pump for the vertical arrangement, the pump and the motor coaxial, so that the weight of the rotating parts and impeller to withstand the same direction of water pressure; Second, the submersible pump is used in the liquid, the transport of sewage media containing impurities, Material; Third, the submersible pump is a kind of centrifugal pump, in its operation, the power is always increased with the increase in traffic, when the flow exceeds the design flow and reach a certain value, the motor will be burned due to overload.
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Submersible pump industry development features is not obvious
Any industry development will have its own industry characteristics, our submersible pump industry is no exception. Now we analyze the submersible pump industry development characteristics and a future development direction.
The first is the area. In the world, the wells with submersible pump manufacturers are mainly concentrated in Europe and the United States, China, India and other countries, in terms of China, mainly concentrated in Shandong, Zhejiang, Guangzhou and other provinces, Zhejiang Wenling submersible pump industry is the most concentrated, Wenling City production and sales accounted for about 60% of the country.
Cyclical. The production and sales of submersible pumps are affected by changes in the overall economy and the disposable income of the residents. But the submersible pump to meet people’s basic production and living needs, but also a relatively rigid demand, cyclical changes are not very obvious.
Seasonal. Well submersible pumps are widely used in the production and living water, agriculture and forestry irrigation and factories, mine water supply and drainage and other fields, does not have obvious seasonal.
Then the future development of submersible pumps are: new technology, the continuous use of new materials, design will tend to more efficient, energy saving, environmental protection direction, the overall design to the modular design of the detachable development direction.
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The cause of submersible pump burned out
1. The ground wire is connected to the wrong power source. There are four cores in the cable of the submersible pump. Be careful not to connect the ground wire as a power cord.
2. Submersible pump mechanical seal damage and leakage. Often use megger to check the submersible pump insulation resistance, the occurrence of insulation resistance is reduced in time to take maintenance measures, it will not happen to burn the motor.
3. After the cable is damaged. Always check the insulation resistance of the submersible pump.
4. Impeller stuck. When the impeller is locked, the current increases over the rated value for a long time, and the stator windings of the submersible pump will burn out soon.
5. Stator windings at both ends of the shell. Winding to ground breakdown.
6. Submersible pump “open”, “stop” too often.
7. Submersible pump dehydration running time is too long. Submersible pump dehydration running time can only be about 1 minute time, a long time, the pump due to poor heat and temperature rise.
8. Lack of work. In the absence of work, the submersible pump is generally in the braking state, the current is much larger than the rated value, when the submersible pump winding temperature increases, if last for a long time, it will burn the stator windings.
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Smoking and fuel injection problems of submersible pump
In the course of operation, if operate improperly, submersible pump is often faulty. Such as submersible pump vacuum drop, fuel injection, smoke, oil spills and other phenomena, if your equipment has such a situation, please do not worry, we help you analyze the relevant knowledge and reasons.
1.Smoking, it is normal if the submersible pump begain to run and smoke. But it is abnormal if smoke for a long time.
Solution: smoking shows that submersible pump inlet has repairation situation, including the pipeline, valves, containers. After the leak, the smoke will end.
2.Fuel injection, it means there is a large number of leaks outside the intake, or even the atmosphere exposed.
Solution: Seal the submersible pump inlet to make it operate, if not spray, then there is a leak; check if the exhaust valve is damaged, replace the bad exhaust valve.
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Explosion proof grade requirements of submersible pumps
The submersible pump will become explosion-proof submersible pump when equipped with explosion-proof motor, motor explosion can be divided into D2BT4 (solid explosion) and D2CT4 (gas explosion). No matter what explosion-proof way is to prevent the use of the pump when the sparks occurred accident, now let’s share explosion-proof submersible pump explosion-proof grade requirements.
Explosion-proof requirements of explosion-proof submersible pumps: This requires the use of electrical equipment under the conditions specified in the design and manufacture, in the above-mentioned explosive with the occasion, even if the equipment failure, will not cause the surrounding explosive The gas environment is ignited and exploded.
To make the submersible motor has a certain explosion-proof performance, can adapt to the explosive environment in the use of requirements, to be submersible motor structure, parts manufacturing materials and manufacturing processes, and other specialized measures to be guaranteed. Explosion-proof submersible pump is in the ordinary submersible sewage pump on the basis of optimization and improvement, submersible submersible submersible submersible pump submersible motor based on the use of explosion-proof motor, pump outside the cable leads to the use of explosion-proof head, its role in the conductive part of the explosive medium, or to prevent dangerous sparks and localized heating of conductive parts that may be in contact with explosive mixtures.
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