The working principle of deep well submersible pump is: Before starting the pump, the suction pipe and pump must be filled with liquid. After the pump is turned on, the impeller rotates at high speed, and the liquid in it rotates with the blades. Under the action of centrifugal force, it flies away from the impeller and shoots out. Outlet, the discharge pipe flows out. At this time, at the center of the blade, the liquid is thrown around to form a vacuum low pressure zone with neither air nor liquid. 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 continuous in this way. 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 insulation resistance of the motor, and the minimum value cannot be less than 5 megohms. The inspection method is to connect one terminal of the megohmmeter to the electric pump cable, and the other terminal to the motor shell, shake the megohmmeter, and observe the insulation resistance value.
2. Check that the diving cable has ground cracks, scratches, etc. If damaged, it should be replaced in time to prevent leakage.
3. The water immersion motor should open the watering bolt, fill it with clean water, tighten the bolt, and then dive into the water. If oil leakage is found in an oil-immersed motor, 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, idling for 1-2 seconds, and start twice, and check if the idling and start are normal. If the direction of rotation is opposite, just change the two-phase wiring.
5. Check whether there are cracks in the pumping pipe and whether the connection is firm.
6. When the electric pump is submerged or hoisted, the cable must not be pulled 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 not placed diagonally.
9. Electric pumps must not transport water or mud with a lot of sand. The flooded motor should always clean the sand particles in the motor cavity and replace the clean water in the motor cavity.
10. The actual pump head 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 extend the service life.
11. After the electric pump is used, it should be cleaned, oiled on the metal surface to prevent rust, and stored vertically in a dry place. The water immersed motor should also be drained of clean water in the motor.