Ultralow-temperature online maintenance ball valve

Abstract

The invention discloses an ultralow-temperature online maintenance ball valve. The ball valve comprises a valve body, a ball body, a valve rod, a valve cover, a stuffing box body, a handle, a left valve seat and a right valve seat, wherein the valve cover is fixed at the upper end of the valve body through bolts, the stuffing box body is arranged at the upper end of the valve cover, and a cavity is formed in the middle shaft of the stuffing box body; the valve rod is inserted into the cavity, and the left valve seat and the right valve seat are arranged in the valve body; the ball body is clamped between the left valve seat and the right valve seat, and the lower end of the valve rod penetrates through the valve cover and is connected with the upper part of the ball body; and the upper endof the valve rod is connected with the handle through an interlocking plate. The ultralow-temperature online maintenance ball valve has the beneficial effects that finite element analysis and optimization design are carried out on the structural strength, the sealing structure is analyzed and tested, so that the sealing performance is more reliable, the production process is simple, the operationtorque is small, and the bending strength is improved.

Description

technical field [0001] The invention relates to the technical field of pressure pipeline components, in particular to an ultra-low temperature on-line maintenance ball valve. Background technique [0002] In the ultra-low temperature pipeline system, the valve is an important pressure-bearing equipment for controlling and regulating the fluid medium, and its working environment is harsh; especially the natural gas condenses from gaseous state to liquid state at -162°C. The existing ultra-low temperature ball valves used in the storage and transportation system have different degrees of failure. Potential safety hazards and structural design flaws make online maintenance difficult. [0003] Therefore, it is necessary to propose an ultra-low temperature on-line maintenance ball valve for the above problems. Contents of the invention [0004] The object of the present invention is to overcome the deficiencies in the prior art and provide an ultra-low temperature on-line main...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to overcome the deficiencies in the prior art and provide an ultra-low temperature on-line maintenance ball valve. In the ultra-low temperature pipeline system, the valve is an important pressure-bearing equipment for controlling and adjusting the fluid medium, and its working environment is harsh; especially natural gas condensation -162°C changes from gaseous state to liquid state. The existing ultra-low temperature ball valves used in the storage and transportation system have varying degrees of safety hazards and structural design defects, which brings difficulties in online maintenance.

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