Working condition self-adaptive backflow self-blocking non-controlled self-priming pump

Abstract

The invention relates to the technical field of water pumps, in particular to a working condition self-adaptive backflow self-blocking non-controlled self-priming pump. The pump comprises a pump machine and an impeller box, wherein a liquid inlet pipe and a liquid inlet branch pipe are arranged at a liquid inlet end of the impeller box, a filter plate and a sand filter cage are sequentially arranged in the liquid inlet pipe in the liquid inlet direction, and the liquid inlet pipe is further provided with a waste discharge pipe for discharging blocking materials on the liquid inlet side of thefilter plate. According to the self-priming pump, the side, located on the liquid inlet side of the filter plate, of the liquid inlet pipe is provided with the waste discharge pipe, when the filter plate in the liquid inlet pipe is blocked, a floating plate moves due to no fluid flowing, a branch pipe valve is driven to open, so that liquid enters the liquid inlet branch pipe, the flowing liquid in the liquid inlet branch pipe can drive an auger in the waste discharging pipe to rotate, the blocking materials gathered on the side of the filter plate is discharged, the liquid inlet pipe is smooth again, the liquid drives the floating plate to reach the balance state, the branch pipe valve is closed, it is realized that foreign matters such as fiber, belt, grass are not damaged and broken tobe discharged, and it is ensured that the output water quality is good, which is conducive to irrigation.

Description

technical field [0001] The invention relates to the technical field of water pumps, in particular to a working condition adaptive backflow self-blocking type non-control self-priming pump. Background technique [0002] The self-priming pump is a self-priming centrifugal pump, which has the advantages of compact structure, convenient operation, stable operation, easy maintenance, high efficiency, long life, and strong self-priming ability. There is no need to install a bottom valve in the pipeline, and it is only necessary to ensure that there is a quantitative suction liquid stored in the pump body before work. Different liquids can use self-priming pumps of different materials; the working principle of the self-priming pump is to fill the pump casing with water (or the pump casing itself has water) before starting the pump. After starting, the impeller rotates at high speed to make the water in the impeller channel flow to the volute. At this time, the inlet forms a vacuum...

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Problems solved by technology

[0003] In order to prevent clogging, existing self-priming pumps are generally equipped with crushing devices on the impeller structure or other parts, but the crushed impurities still exist in the water and are discharged along the drain pipe, resulting in poor drainage water quality. When the pump draws water from the field ditches to irrigate crops, such water quality will easily cause the thinner nozzles to be blocked, making it impossible to spray irrigation

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