Working condition adaptive backflow self-blocking type uncontrolled 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 type non-control self-priming pump, which includes a pump and an impeller box. The liquid inlet end of the impeller box is provided with a liquid inlet pipe and a liquid inlet branch pipe. The liquid inlet pipe is provided with a filter plate and a sand filter cage sequentially from the liquid inlet direction, and the liquid inlet pipe is also provided with a waste discharge pipe for discharging the blocking material on the liquid inlet side of the filter plate; One side of the filter plate is located on the liquid inlet side of the filter plate, and a waste discharge pipe is provided. When the filter plate in the liquid inlet pipe is blocked, the floating plate will move due to no fluid flow, and then drive the branch pipe valve to open to allow the liquid inlet branch pipe to enter liquid, and the flowing liquid in the liquid inlet branch pipe will drive the auger in the waste discharge pipe to rotate, and discharge the blocking material accumulated on one side of the filter plate, so that the liquid inlet pipe is turned on again, and the fluid drives the floating plate to reach a balanced state, so that The branch pipe valve is closed to prevent damage and fragmentation of foreign matter such as fibers, tapes, and grass, and to discharge it to ensure that the output water quality is good for 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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