Integral top mounting type ultra-high pressure and ultra low temperature hard seal ball valve

Abstract

An integral top-mounted ultra-high pressure ultra-low temperature hard-sealed ball valve, the ball valve is mainly composed of a valve body (1), a valve cover (24), a handle ball (3), a valve seat (13), a rear valve seat (10) and a valve Rod bearing seat (16) etc. are formed. Placed inside the valve body (1) and passing through the handle ball (3) at the center of the valve cover (24), the handle ball (3) is rotated 90 degrees by external force to realize the opening and closing of the pipeline. The sealing is to hold the symmetrical rear valve seat (10) and valve seat (13) on both sides of the handle sphere (3), and push and hold the handle sphere (3) with the elastic force of the valve seat butterfly spring (12) to realize the spherical surface seal. The sealing of the valve stem adopts a unique self-sealing pre-tightening device triple sealing structure, which can ensure the sealing under low pressure conditions, and under the action of high pressure, the medium pressure acts on the pressure bearing ring (17) to achieve self-sealing, thereby avoiding the need for packing seals With high pressure, the valve stem opening torque becomes very large.

Description

(1) Technical field [0001] The application of the present invention relates to a ball valve, in particular to an integral top-mounted ultra-high pressure, ultra-low temperature hard-sealed ball valve. (2) Background technology [0002] Ball valve is a kind of valve widely used in the field of industrial production, but in some environments with special requirements, such as the switching of media such as deep sea offshore platforms, natural gas storage and aerospace devices, in high pressure and ultra-low temperature environments, the sealing of ball valves , strength and valve torque will have problems, thus affecting the normal production use. The hardness, strength, wear resistance and corrosion resistance of materials under long-term ultra-low temperature and high pressure cannot meet the ideal requirements, and high-performance ball valves are often required. [0003] In the environment of ultra-high pressure and ultra-low temperature, a ball valve with good sealing ...

AI Technical Summary

Problems solved by technology

[0002] Ball valve is a kind of valve widely used in the field of industrial production, but in some environments with special requirements, such as in the switching of media such as deep-sea offshore platforms, natural gas storage and aerospace devices, in high-pressure and ultra-low temperature environments, the sealing of ball valves , strength and valve torque will have problems, thus affecting the normal production use

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