Lift check valve

Abstract

The invention discloses a lift check valve. According to the technical scheme, the lift check valve comprises a valve body and a valve deck, a valve rod sleeve is arranged on the inner side of the valve deck, a sliding chute is formed in the valve rod sleeve, the upper end of a valve rod is arranged in the sliding chute in a sliding mode, first magnets are arranged on a valve clack and located on the two sides of the valve rod respectively, and second magnets attracted to the first magnets are arranged on the lower portion of the valve rod sleeve; two auxiliary rods are arranged on the valve rod, the other ends, opposite to the valve rod, of the two auxiliary rods are attached to the inner wall of the valve body, accommodating grooves capable of accommodating the two auxiliary rods respectively are formed in the inner wall of the valve rod, and a rubber ball is arranged at the upper end of each accommodating groove. The lift check valve is sensitive in reaction, the valve clack can rise and fall quickly, shaking and rotation of the valve clack can be prevented during movement, and the service life of the lift check valve is prolonged.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a lifting check valve. Background technique [0002] 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. 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. Lift check valve refers to the check valve whose disc slides along the vertical center line of the valve body. Lift check valve can only be installed on horizontal pipelines. On high-pressure small-diameter check valves, the disc can use a ball. The valve body shape of the lift check valve is the same as that of the globe valve (it can be used in common with the globe valve), so its fl...

AI Technical Summary

Problems solved by technology

[0003] The existing problems of the lifting check valve in the prior art are that the response of the check valve is sluggish, that is, the lifting of the valve disc is not fast enough, and the valve disc is prone to jamming, and the other is that the flowing medium in the valve body is in an unstable state, which will cause Cause the valve disc to shake and rotate from side to side during the lifting process, which will cause rapid wear of the valve stem and valve disc, reducing the service life of the lift check valve

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