Non-return device of one-way valve

Abstract

The invention discloses a non-return device of a one-way valve and relates to the technical field of one-way valves. The non-return device comprises a non-return device body which comprises a pipe body, a ball body, a base, a sealing plate, an elastic plate and a maintenance door; two ends of the base are fixedly connected to the inner walls of two sides of the lower end of the pipe body, separately; the sealing plate is fixedly connected to the inner walls of two sides of the upper end of the pipe body; and the middle part of the upper end of the base is fixedly connected to the middle part of the bottom end of the elastic plate through compression springs. According to the non-return device of the one-way valve, on the one hand, the ball body is matched with a second slot, so that the ball body can be sealed more tightly; on the other hand, the elastic plate can slow down impact of a water flow, so that the ball body and the compression spring are prevented from being damaged as theimpulsive force is too great; then, the two compression springs can pop the ball body into the second slot quickly when a water flow is closed to prevent backflow of the water flow. In addition, the maintenance door can be opened when the non-return device body goes wrong to maintain the non-return device body.

Description

technical field [0001] The invention relates to the technical field of one-way valves, in particular to a check device for one-way valves. Background technique [0002] In the water mixing valve of the solar water heater, in order to avoid the crossover of hot and cold water, it is usually necessary to install a check valve at the cold and hot water ports of the valve. The structure of the existing check valve is a circular plate with a guide rod. When the water flows in the reverse direction, the circular plate is pressed against the nozzle to prevent the water from flowing in the reverse direction. In actual use, there is a small gap between the edge of the circular plate and the inner wall of the nozzle, and it is easy to trap solid impurities such as sand and scale residue in the gap, resulting in the check valve not being closed tightly and failing to prevent the reverse flow . In order to prevent the interference of solid impurities, filters can be installed at the c...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a check device for a one-way valve, which solves the problem that the existing check device for a one-way valve has poor effect, high cost, easy damage, and inconvenient use. Problems that are not conducive to promotion and use

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