Water-hammer-resisting multi-flow-channel multi-seal check valve

Abstract

The invention provides an anti-hammer multi-channel multi-seal check valve, which includes a valve body, a guide body, a first bush, a valve flap, a guide shaft and a spring, and the valve flap is fitted on the guide shaft and the first bush through the guide shaft and the first bush. Inside the fluid, the spring is assembled on the guide shaft, and also includes a buffer body, which is fixed on the valve body through a bracket. The buffer body is arranged on one side of the valve disc closing direction and is in sealing contact with the valve disc when the valve disc is closed; the buffer body has Protruding arc-shaped buffer wall, inside the arc-shaped buffer wall is a buffer cavity, inside the arc-shaped buffer wall is a second bushing, the guide shaft passes through the valve disc and is connected with the second bushing, and the valve disc is also equipped with There are diversion holes connected with the buffer cavity. The valve of the present invention has a buffer body structure, which can reduce the water hammer caused by the excessive pressure difference of the fluid when the valve is working normally, avoid the wear of the valve caused by the excessive impact force, and can also realize the silent check role.

Description

technical field [0001] The invention belongs to the technical field of valves, in particular to a multi-channel multi-seal check valve for anti-hammer. Background technique [0002] Check valve is also known as check valve, back pressure valve or one-way valve. The main function of check valve is to prevent the medium from flowing backward. The check valve is an automatic valve, which is automatically opened or closed by the thrust of the medium flow in the pipeline. [0003] The opening and closing part of the check valve is the valve disc, which moves up and down along the central axis of the valve body. The valve disc of the check valve can be loaded with springs to achieve rapid closing. During the long-term use of the existing check valve disc, the sealing pair is subject to long-term wear and tear by the medium, which is prone to the problem of reduced pressure bearing capacity or even damage, resulting in a reduced service life of the valve. Contents of the inventi...

AI Technical Summary

Problems solved by technology

During the long-term use of the existing check valve disc, the medium wears the sealing pair for a long time, which is prone to the problem of reduced pressure bearing capacity or even damage, resulting in a reduction in the service life of the valve

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