Rotary opening type check valve

Abstract

The invention relates to a rotary opening type check valve, which comprises a valve body, a valve core, a valve base, a valve rod mounted on the valve body, and a valve clack which is fixed and is located in a valve cavity of the valve body and can rotate around the valve rod. The axle center of the valve rod transversely penetrates into an upper half circle of a circular pipe; a balancing block which coaxially rotates with the valve clack is arranged at the back side of the valve clack; and the distance from the center of gravity of the balancing block to the axle center of the valve rod is longer than the distance from the center of gravity of the valve clack to the axle center of valve rod. The rotary opening type check valve provided by the invention has smaller volume and lower cost without changing the caliber of the pipe; and when the rotary opening type check valve is closed, the impaction between the valve clack and the valve base is small.

Description

technical field [0001] The invention relates to a valve switch, in particular to a check valve. Background technique [0002] The function of the check valve is to only allow the medium to flow in one direction and prevent the flow in the opposite direction. Usually this kind of valve works automatically. Under the action of fluid pressure flowing in one direction, the valve disc opens; when the fluid flows in the opposite direction, the valve seat is acted on by the fluid pressure and the self-weight of the valve disc to cut off the flow. 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 backflow of the medium, also known as check valve, one-way valve, reverse flow valve, and back pressure valve. Its main function is to prevent the reverse flow of the medium, prevent the reverse rotation of the pump and the drive motor, and discharge the container medium. Check valves are also used on lines...

AI Technical Summary

Problems solved by technology

Since the valve stem of the disc is set above the pipeline, the valve body of the check valve needs to reserve space above the pipeline, resulting in a larger volume and higher cost of the check valve. During the closing process, the valve disc is far away from the valve stem. The rotating diameter of the part is large, the stroke is long, and the potential energy is large. Under the action of fluid pressure and self-weight, the impact force between the valve seat and the valve seat is large, and it is easy to damage the sealing surface of itself and the valve seat.

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