Ball valve

Abstract

The invention discloses a ball valve, which comprises a primary valve body, a secondary valve body and a metal hex seal gasket, wherein the primary valve body and the secondary valve body are bolted; the cross section of the outer surface of the metal hex seal gasket is trapezoidal; the secondary valve body is provided with an extended section; the position on the secondary valve body, which is near the extended section, is provided with a first annular pressure groove; the outer wall of the first annular pressure groove is provided with a first slope fitted with the metal hex seal gasket; the position on primary valve body, which is opposite to the first annular pressure groove, is provided with a second annular pressure groove; the outer wall of the second annular pressure groove is provided with a second slope fitted with the metal hex seal gasket; after being assembled, the metal hex seal gasket is clamped in the first annular pressure groove and the second annular pressure groove. According to the ball valve disclosed by the invention, the metal hex seal gasket between the primary ball body and the secondary valve body is high in strength and good in rebound resilience, and suitable for high-temperature and high-pressure occasions. Moreover, a mode that sealing filler is filled in a seal groove is adopted by the second seal of the primary valve body and the secondary valve body, and under the synergistic action of the second seal and the metal hex seal gasket, the goal of seal double insurance is achieved.

Description

technical field [0001] The invention relates to a control valve for medium circulation in a pipeline, in particular to a ball valve. Background technique [0002] Ball valves can be used in petroleum, chemical, natural gas, electric power and other industries. The ball valve is composed of some parts of the valve, the driving mechanism and related accessories. However, the ball valves of the prior art mainly have the following problems: 1. Most of the sealing forms adopted by the main and auxiliary valve bodies of the existing common ball valves are non-metallic sealing gaskets, which have low strength and poor rebound , easy to crush, not suitable for high temperature and high pressure occasions. 2. Most of the existing common ball valve main and auxiliary valve bodies adopt one sealing form, which will cause the entire valve body to leak once this sealing fails, and lose the original reliability. 3. Most of the existing ordinary ball valves are in direct contact with th...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a ball valve to overcome the defects that the control valve of the prior art is not suitable for high temperature and high pressure occasions and has poor sealing reliability.

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