High pressure DC swing check valve

Abstract

The invention discloses an HVDC (High Voltage Direct Current) swing check valve, which solves the problems that an existing check valve is opened slowly, the back falling stress during the back falling of a valve flap is large and a high-pressure water attack phenomenon is caused. The HVDC swing check valve comprises a valve seat, a valve flap, a valve cover and a valve body, wherein the valve body is internally provided with a Y-shaped medium passage, the inner wall of the valve body is provided with a cantilever, the cantilever is hinged to the valve flap through a hinging shaft, the hinging shaft is arranged between the end surface of the valve flap and a center line of the valve flap, and the valve flap is provided with a first position which is in sealing with the valve seat and a second position which enables a medium to flow in the medium passage around the hinging shaft. According to the HVDC swing check valve disclosed by the invention, the integrated valve body is adopted, the hinging shaft is directly connected with one side of the valve flap, the cantilever enables the valve flap to be opened and closed more quickly, the valve flap can be flexibly opened and closed in a viscous medium or an unclean medium, and the production cost of products is greatly reduced; in addition, the back falling stress during the back falling of the valve flap is small, the closing time is very short, the service life of the products is greatly prolonged, and the using safety of the products is greatly increased.

Description

Technical field [0001] The invention relates to a check valve, in particular to a high-pressure direct current swing check valve. Background technique [0002] One-way valve (One-way valve), also known as check valve, check valve, one-way valve or check valve, is mainly used in pipelines where the medium flows in one direction, and only allows the medium to flow in one direction to prevent accidents. . According to the structure, check valves can be divided into lift check valves, swing check valves and butterfly check valves. figure 1 The structure of the existing Y-type lift check valve is given in figure 2 The structure of the existing swing check valve is given in. The disc and rocker arm of the existing swing check valve are usually fixed by bolts, while the rocker arm is usually connected to the cantilever by a hinge shaft, and the cantilever is fixed on the lug of the valve body by screws. Since the hinge axis of the return valve is far away from the center of the valve...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the slow opening and closing of the existing check valves in the background technology, the seat force is large when the valve clack falls back, the water hammer force generated after the medium reflows for a long time destroys the pipeline, and the Y-shaped lifting check valve is viscous or not. The problem that it is easy to get stuck in the cleaning medium and cannot move, the present invention provides a high-voltage DC swing check valve

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