Blockage-prevention winding-prevention centrifugal type self-suction sewage pump

Abstract

The invention discloses a blockage-prevention winding-prevention centrifugal type self-suction sewage pump. The pump is composed of a pump body, an impeller, a pump shaft and a suspension; a suction opening, a suction channel, an exhaust opening, a gas and water separation chamber and a water returning hole are formed in the pump body; a suction one-way valve is arranged on the suction opening, particularly, in the suction channel of the pump body, an impurity cutter coaxial with the impeller is arranged in front of an impeller water inlet, and is composed of a fixed cutter rest and a cutter wheel, a fixed cutter on the fixed cutter rest and a movable cutter on the cutter wheel form a cutting pair, the pump shaft drives the impeller to rotate and meanwhile drives the cutter wheel to rotate, and fiber impurities in conveyed media are cut and broken before entering the impeller; the blockage-prevention winding-prevention centrifugal type self-suction sewage pump has the beneficial effects that a cutting device on an impeller inlet is used for cutting and breaking the fiber impurities in the conveyed media, winding and blockage of blades in the impeller due to the fiber impurities are removed, the sewage pump can reliably and normally run, and the problem happening when the centrifugal type self-suction sewage pump is used as a self-suction sewage pump is solved.

Description

technical field [0001] The invention relates to a centrifugal pump, in particular to an anti-clogging and anti-winding centrifugal self-priming sewage pump. Background technique [0002] In the well-known common centrifugal pump, if the suction liquid level is below the impeller, it should be pre-filled with water when starting, which is very inconvenient. In order to store water in the pump, a bottom valve needs to be installed at the inlet of the suction pipe. When the pump is working, the bottom valve will cause a large hydraulic loss. The so-called self-priming pump means that it does not need to be irrigated before starting (it still needs to be irrigated for the first time after installation). After a short period of operation, the pump itself can suck up the water and put it into normal work. [0003] Due to the special structure of the pump body of the gas-liquid hybrid self-priming pump, after the pump stops, there is a certain amount of water in the pump body. Aft...

AI Technical Summary

Problems solved by technology

[0005] The problem when used as a sewage pump is that the anti-winding and anti-clogging performance of the impeller is poor, especially the fibrous impurities, which are easy to wrap around the blades, or block the outlet of the blades, so that the performance of the pump is reduced, and even cannot work normally.

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