Metal sealing valve seat and wear-resisting ball valve

Abstract

The invention relates to a metal sealing valve seat and a wear-resisting ball valve. The metal sealing valve seat comprises a valve seat body which is provided with an axial channel. A valve seat sealing face is arranged at one end of the valve seat body, and at least one radial groove is formed in the end face of the other end of the valve seat body. At least one axial groove is formed in the outer circle face of the valve seat body and penetrates the two end faces of the valve seat body. One end of the radial groove communicates with the axial channel, and the other end of the radial groovecommunicates with one end of the axial groove. By means of the metal sealing valve seat and the wear-resisting ball valve, when the valve is partly opened, a middle cavity of the valve is automatically purged through medium gas in a pipeline or by leading high-pressure gas, the phenomenon that medium dust particles are gathered in the middle cavity and harden a sealing face embedded in a downstream valve seat and a ball body is prevented, the sealing reliability of the valve is improved, and the service life of the valve is prolonged; and in addition, a hole does not need to be formed in the outer portion of the valve for leading gas for purging, the effects of energy conservation and consumption reduction can be achieved, in addition, extra external leaking points are reduced, and the valve is better in sealing performance and safer.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a metal sealing valve seat and a wear-resistant ball valve. Background technique [0002] The impurity particles in the existing wear-resistant ball valve medium cannot be purged and cleaned after entering the middle cavity. After the valve is used for a long time, the metal sealing valve seat is easy to loosen, and the impurity particles in the medium are easily embedded in the loose surface, causing the metal sealing valve seat and the ball to lock up. , not only will damage the valve seat but also affect the sealing performance and valve service life. SUMMARY OF THE INVENTION [0003] The invention aims to provide a metal sealing valve seat and a wear-resistant ball valve. The valve seat can not only play the role of sealing and cooperation, but also play the role of connecting the flow channel and the valve cavity, which is convenient for purging and cleaning the valve cavit...

AI Technical Summary

Problems solved by technology

[0002] The impurity particles in the medium of the existing wear-resistant ball valve cannot be purged and cleaned after entering the middle cavity. After the valve is used for a long time, the metal sealing valve seat is easy to loosen, and the impurity particles in the medium are easily embedded in the loose surface, causing the metal sealing valve seat and the ball to lock. , not only will damage the valve seat but also affect the sealing performance and service life of the valve

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