A wafer check valve

Abstract

The invention relates to a wafer check valve, comprising a valve body, a valve shaft arranged on the valve body, two semicircular valve discs, sleeved on the valve shaft and used to press against the two half-circles. The first torsion spring of the circular valve disc, and two flat semicircular valve seats corresponding to the two semicircular valve discs and respectively arranged on the circumferences of the two fluid inlets of the valve body, one of the semicircular valve seats The valve disc is fixedly connected with the valve shaft, and the other semicircular valve disc is fixedly connected with a shaft sleeve which is sleeved outside the valve shaft and is rotatably connected with the valve shaft. The valve also includes a buffer mechanism for slowing the closing speed of the semicircular valve flap when it is closed. The beneficial effects of the present invention are as follows: by setting the buffer structure, the speed of the semicircular valve disc can be slowed down when it is closed, so that the water hammer phenomenon can be alleviated, and the force when the semicircular valve disc is closed can also be reduced. The flap and the flat semicircular valve seat play a good protective role.

Description

technical field [0001] The invention belongs to the technical field of check valves, in particular to a wafer check valve. Background technique [0002] Wafer check valve is a one-way valve. When working, the opening and closing parts are automatically opened or closed by the flow of the medium and the force. It belongs to the automatic valve type. Backflow, preventing the reverse rotation of the pump and its drive motor and the discharge of the fluid medium in the container. The wafer check valve in the prior art has the following problems during use: [0003] 1. When the pump is stopped during the use of the wafer check valve, the water hammer of the pump will be generated because the check valve is closed too fast. The water hammer phenomenon exists objectively in the pipeline for transporting liquid, and its damage is relatively If it is too large, it can cause uneven pressure in the pipeline, causing the pipe to rupture or collapse, and it is also destructive to the v...

AI Technical Summary

Problems solved by technology

[0003] 1. When the pump is stopped during the use of the clip-type check valve, the pump stop water hammer will occur because the check valve is closed too quickly. The water hammer phenomenon exists objectively in the pipeline for transporting liquid, and its damage is relatively large. Large, it can lead to uneven pressure in the pipeline, causing the pipe to rupture or collapse, and it is also destructive to the valve disc and fixing parts;

[0004] 2. When the valve disc of the wafer check valve is closed, due to the closing speed is too fast, the valve disc will collide with the valve seat, which will easily damage the sealing surface of the valve seat and cause the check valve to fail to seal.

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