Slow-closure type check valve

Abstract

The invention discloses a slow-closure type check valve, which comprises a valve body. A valve seat is arranged on the valve body; a rotary plate is rotatably arranged on the valve seat and is fixedlyconnected with a valve rod; a return rod is arranged on a side face of the rotary plate; an elastic rod is fixedly connected between the return rod and the valve body; a pair of damping fins are further arranged on the valve body and are movably connected with a valve clack; the clamping fins are connected through a linear spring; a reducing pipe is further connected onto the valve body; and a connector is arranged on the tail end of the reducing pipe. According to the slow-closure type check valve provided by the invention, the rotary plate is fixedly connected onto the valve rod, the elastic rod with a rebounding function is arranged between the rotary plate and the valve body and is used for rebounding the valve clack, and when the valve clack is closed by the impact of a fluid, the elastic rod can provide a support elastic force for the valve clack, so that the valve clack and the valve body cannot be collided, the valve clack is closed slowly, and the service life of the valve clack can be effectively prolonged.

Description

technical field [0001] The invention relates to a check valve, more precisely, a slow-closing check valve. Background technique [0002] Check valve (also known as check valve) refers to the valve that relies on the flow of the medium itself to automatically open and close the disc to prevent the medium from flowing backward. It is also called check valve, one-way valve, reverse flow valve, and back pressure valve. The check valve is a kind of automatic valve, its main function is to prevent the reverse flow of the medium, the reverse rotation of the pump and the drive motor, and the discharge of the container medium. Check valves are also used on lines that supply auxiliary systems where the pressure may rise above system pressure. The discs of the check valves commonly used at present are mostly fast opening and closing structures, and the impact force between the discs and the valve body is relatively large, which affects the service life of the discs. Contents of ...

AI Technical Summary

Problems solved by technology

The discs of the check valves commonly used at present are mostly fast opening and closing structures, and the impact force between the disc and the valve body is relatively large, which affects the service life of the discs.

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