Dual-material multi-protection sealing mechanism of ball valve

Abstract

The invention relates to the technical field of ball valve sealing devices and in particular to a dual-material multi-protection sealing mechanism of a ball valve. The dual-material multi-protection sealing mechanism of the ball valve comprises an annular sealing valve seat and a soft sealing assembly mounted on the annular sealing valve seat. The soft sealing assembly is provided with a soft sealing surface for matching with a spherical surface of the ball valve. The dual-material multi-protection sealing mechanism of the ball valve is characterized in that at least one first rigid sealing ring is mounted on the annular sealing valve seat. Due to implementation of the above technical solution, the dual-material multi-protection sealing mechanism of the ball valve realizes dual-material multi-seal of the ball valve by means of independent designs of the soft sealing assembly and the first rigid sealing ring. By means of complementary effects, the reliability of seal for coping with the case of a medium containing small particles is improved. Each seal has independent integrity, thereby enhancing the replaceability of the present invention. Besides, a first dusting scraper adjacent to a first rigid sealing surface is capable of effectively removing scale and particles covering the spherical surface of the ball valve to ensure formation of an effective sliding seal pair on the soft sealing surface, the rigid sealing surface and the spherical surface of the ball valve, thus improving the sealing property and prolonging the service life.

Description

technical field [0001] The present application relates to the technical field of a ball valve sealing device, in particular to a ball valve dual-material multiple-protection sealing mechanism. Background technique [0002] The ball valve has the advantages of small fluid resistance, fast and convenient switching, good sealing performance in the early stage of use, and easy installation, etc. . However, the existing ball valve sealing structure cannot overcome the fact that small particles in the medium will be squeezed into the sealing surface during the opening and closing process. Once the sealing surface is squeezed, it will cause scaling or damage to the spherical surface. Once the number of openings reaches a certain number, it is easy to form a gap, and the valve cannot be sealed, especially in the transmission pipeline of mixed media such as dusty gas, liquid or solid powder, the valve will be blown out in a short time For a large hole, the solution at this stage is...

AI Technical Summary

Problems solved by technology

At the same time, the smoothness of the spherical surface must be improved, and the hardness of the spherical surface must be improved to solve the problem of erosion resistance. Such a sealing standard requires extremely high manufacturing costs, and the effect is not obvious.

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