The deep well water pump is a water-lifting tool that is directly connected with the motor and the water pump to work in the water. It has the advantages of simple structure, high unit efficiency, low noise, safe and reliable operation, and convenient installation and maintenance. It is suitable for extraction from deep water wells, hot water wells and oceans, as well as extraction from rivers, reservoirs, canals, etc. It is mainly used for farmland irrigation and human and livestock water in plateau and mountainous areas, and can also be used for cities, factories, railways, mines, construction sites, Drain use.
The working principle of deep well water pump:
Before starting the pump, the suction pipe and the pump must be filled with liquid. After the pump is turned on, the impeller rotates at a high speed, and the liquid in it rotates with the blades. Under the action of centrifugal force, it flies away from the impeller and is ejected outward. The ejected liquid gradually slows down in the diffusion chamber of the pump casing, and the pressure gradually increases. Outlet, the discharge pipe flows out. At this time, a vacuum low-pressure area with neither air nor liquid is formed at the center of the blade due to the liquid being thrown around. The liquid in the liquid pool flows into the pump through the suction pipe under the action of the atmospheric pressure on the pool surface, and the liquid is thus continuous. It is continuously sucked up from the liquid pool and continuously flows out of the discharge pipe.
1. Before using the electric pump, use a megohmmeter to check the motor insulation resistance, and the low value should not be less than 5 megohms. The inspection method is to connect one terminal on the megohmmeter to the electric pump cable, and the other terminal to the motor casing, shake the megohmmeter, and observe the insulation resistance value.
2. Check the submersible cable for cracks, scratches, etc. If it is damaged, it should be replaced in time to prevent leakage.
3. The water immersion motor should open the irrigation bolt, fill it with clean water, tighten the bolt, and then dive into the water. If the oil-immersed motor is found to leak oil, the sealing element should be replaced before diving into the water.
4. Before the electric pump is submerged in the water, the pump should be filled with clean water, idle for 1-2 seconds, and start twice to check whether the idle operation and start are normal. If the direction is reversed, the two-phase wiring can be exchanged.
5. Check whether the lift pipe has cracks and whether the connection is firm.
6. When the electric pump is submerged or hoisted, do not pull the cable to avoid damage to the cable or disconnection at the joint.
7. The power supply voltage should be controlled within 5% of the rated voltage. If the voltage is too high or too low, the motor will be damaged.
8. The electric pump should be vertical when submerged in the water, and should not be placed obliquely.
9. The electric pump shall not transport water or mud with high sand content. For flooded motors, the sand in the motor cavity should be cleaned frequently, and the clean water in the motor cavity should be replaced.
10. The actual head of the pump should be within 0.8-1 times the rated head. This can improve the working efficiency of the electric pump, save electricity, avoid overloading the motor, and prolong the service life.
11. After the electric pump is used, it should be cleaned, oiled to prevent rust on the metal surface, and stored vertically in a dry place. If the motor is submerged in water, the clean water in the motor should also be drained.