Stop valve

Abstract

The invention relates to the technical field of valve bodies, in particular to a stop valve. The stop valve comprises a valve seat, a control oil cylinder, a valve body and a valve rod assembly. The valve rod assembly comprises a first valve rod and a second valve rod. A spherical concave surface is arranged at the end, facing the second valve rod, of the first valve rod, a spherical convex surface is arranged at the end, facing the first valve rod, of the second valve rod, and the spherical concave surface is used for making surface contact with the spherical convex surface; and one end of the first valve rod extends out of an inner cavity from an opening and is connected with a piston rod of a control oil cylinder, and the first valve rod is used for abutting against the second valve rodunder the driving effect of the control oil cylinder so as to drive the second valve rod to move relative to the inner cavity, and therefore a first flow channel and a second flow channel are blockedor communicated. The stop valve is simple in structure and small in mechanism size, automatic control over an ultrahigh-pressure hydraulic system can be achieved, and therefore close-range operationof workers is reduced, and potential safety hazards are eliminated.

Description

technical field [0001] The present invention relates to the technical field of valve bodies, in particular to a shut-off valve. Background technique [0002] The globe valves on the market are commonly controlled manually and pneumatically. When the working pressure is high, the manual control is difficult to operate, and it is difficult to realize the automatic control of the ultra-high pressure hydraulic system, and there are potential safety hazards for the staff to operate at close range; and the size of the pneumatic control mechanism is large and inconvenient to use. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a shut-off valve, which has a simple structure and a small size of the mechanism, and can realize the automatic control of the ultra-high pressure hydraulic system, thereby reducing the short-range operation of the staff, thereby eliminating potential safety hazards. [0004] Embodiments of the present invention are imp...

AI Technical Summary

Problems solved by technology

When the working pressure is high, the operation of manual control is difficult, and it is difficult to realize the automatic control of the ultra-high pressure hydraulic system, and there are potential safety hazards for the staff to operate at close range; and the size of the pneumatic control mechanism is large and inconvenient to use

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