Spherical stop valve

Abstract

The invention specifically relates to a spherical stop valve. The spherical stop valve comprises a valve body, wherein the left end of the valve body is equipped with a limiting valve sleeve; the right end of the valve body is equipped with a valve sleeve; a valve element is arranged at the inner end of each of the limiting valve sleeve and the valve sleeve; ends, close to the valve sleeve and thevalve sleeve, of the valve elements are connected with connecting rods through first springs; the other ends of the connecting rods are connected with inner ends of grooves in the inner side of the limiting valve sleeve and the inner side of the valve sleeve through first springs; opposite sides of the two valve elements which are symmetrically arranged are equipped with valve seats; a guide sleeve is arranged between the two valve seats; two symmetrical ejector rods are symmetrically arranged inside the guide sleeves; the two symmetrical ejector rods and the two valve elements are connectedthrough valve rods; and second springs sleeve outside the valve rods. The spherical stop valve has the beneficial effects of effectively preventing leakage of a medium through multiple retainer rings,O-shaped rings and valve pads, enabling the sealing effect to reach practical use needs, and guaranteeing cut-off and go-through of the medium, and has a popularization and application value.

Description

technical field [0001] The invention specifically relates to a spherical stop valve. Background technique [0002] Globe valve, also called cut-off valve, is the most widely used valve. The reason why it is popular is that the friction between the sealing surfaces is small during the opening and closing process, it is relatively durable, the opening height is not large, it is easy to manufacture, and it is easy to maintain. Convenient, not only suitable for medium and low pressure, but also for high pressure. The closing principle of the globe valve is to rely on the pressure of the valve rod to make the sealing surface of the disc and the sealing surface of the valve seat fit closely to prevent the flow of medium. [0003] The valve plays an important role in cutting off and throttling the medium in the pipeline where it is located. As an extremely important cut-off valve, the globe valve is sealed by applying torque to the valve stem, and the valve stem moves upward in th...

AI Technical Summary

Problems solved by technology

[0004] Among the stop valves, there is a type of spherical stop valve. In the prior art, when the spherical stop valve is used, the medium will leak, and its sealing effect is poor, so it is difficult to use normally.

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