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

Abstract

Disclosed is an internal top-mounting type super-high pressure super-low temperature hard sealing ball valve, which is mainly composed of a valve body (1), a valve cover (24), a ball body with a handle (3), a valve seat (13), a rear valve seat (10), a valve rod bearing seat (16) and the like. The ball body with a handle (3) placed in the valve body (1) penetrates through the center of the valve cover (24), and the ball body with a handle (3) is enabled to rotate 90 degrees by an external force to realize the opening and the closing of pipes. The sphere sealing is realized by that two sides of the ball body with a handle (3) hold the rear valve seat (10) and the valve seat (13), and a valve seat spring (12) elastically pushes and presses the ball body with a handle (3). The sealing of a valve rod employs a unique three-ply sealing structure of a self-sealing preloading device, which can guarantee sealing under low pressure, and under the action of high pressure, medium pressure action realizes self-sealing for a bearing ring (17), thereby avoiding that filling material sealing needs the high-strength pressure, and the torque becomes extremely large when the valve rod is opened.

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 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 effect, sma...

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 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 use

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