Protection device for submersible pump

Abstract

The invention provides a protection device for a submersible pump, which includes a variable diameter tube and a clip-on butterfly check valve from top to bottom, the variable-diameter tube includes an upper thick tube and a lower thin tube, and the clip-on butterfly check valve The check valve is connected to the lower thin pipe through a flange, and a sand filter screen is arranged at the junction of the upper thick pipe and the lower thin pipe, and a slide bar is fixed at the lower end of the sand filter screen. A positioning frame perpendicular to the central axis of the reducing tube is fixed on the inner wall of the lower thin tube, the slide bar passes through the positioning frame, and a crosspiece is provided at the lower end of the slide bar. The present invention can well prevent accumulation The water flows back, and it can prevent the sand and stones in the water from depositing in the wafer butterfly check valve, avoiding that when the submersible pump is powered on again, some sand and stones cannot be washed out in time and enter the impeller, causing unnecessary damage to the impeller. The friction effectively protects the submersible pump and prolongs the life of the submersible pump.

Description

technical field [0001] The invention relates to the field of submersible pumps, in particular to a protection device for a submersible pump. Background technique [0002] The submersible pump is an important equipment for lifting water from deep wells. When in use, the entire unit is submerged into the water to extract groundwater to the surface. It is mainly used for farmland irrigation and water for humans and animals in high mountainous areas. There will be a lot of accumulated water in the pipeline, and the return of accumulated water after power failure will cause unnecessary friction between the stator and rotor of the submersible pump and unnecessary wear of the bearing seat of the thrust disc of the water wheel, reducing the service life of the submersible pump . Contents of the invention [0003] The purpose of the present invention is to provide a submersible pump protection device with simple structure and capable of effectively prolonging the service life of t...

AI Technical Summary

Problems solved by technology

[0002] The submersible pump is an important equipment for lifting water from deep wells. When in use, the entire unit is submerged into the water to extract groundwater to the surface. It is mainly used for farmland irrigation and water for humans and animals in high mountainous areas. There will be a lot of accumulated water in the pipeline, and the return of accumulated water after power failure will cause unnecessary friction between the stator and rotor of the submersible pump and unnecessary wear of the bearing seat of the thrust disc of the water wheel, reducing the service life of the submersible pump

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