Air cylinder type check valve

Abstract

The invention provides an air cylinder type check valve. The air cylinder type check valve comprises a check valve cylinder body, a flat cover fixedly installed on the check valve cylinder body, a rotary feeder installed in the check valve cylinder body in a rotating mode, a large bush fixedly installed on one side of the check valve cylinder body, and an air cylinder installed on one side of the check valve cylinder body through an air cylinder flange. A telescopic rod of the air cylinder is sequentially provided with a bush and a water sealing ring. An inner joint is installed on a pipeline between the bush and the water sealing ring. The air cylinder type check valve has the advantages that the air cylinder is used for controlling valve clacks of the check valve, the valve clacks can be effectively closed, backflow of media is effectively blocked, meanwhile, long-time and continuous stability can be kept under the control of the air cylinder, the safety and stability of long-term use of the check valve can be ensured, and a guarantee is provided for safety production of an enterprise.

Description

technical field [0001] The invention relates to a mechanical part, in particular to a check valve for one-way flow of liquid in pipelines. Background technique [0002] Check valve (also known as check valve) refers to a 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 existing check valve prevents the backflow of the medium by closing the valve flap. After a period of use, the closing performance of the valve flap becomes worse, which reduces the performance of the check valve...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of poor closing performance of the disc of the existing check valve after long-term use, the present invention provides the following technical solutions:

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