Pneumatic globe valve

Abstract

The invention discloses a pneumatic stop valve and relates to the technical field of valves. Pneumatic shells, ejector rods, valve elements and other components of pneumatic stop valves are prevented from being seriously damaged and even flied off when the pneumatic stop valves bear high-pressure fluid pressure, and object strike accidents are avoided. The pneumatic stop valve comprises a pneumatic shell, an ejector rod, a valve sleeve and a valve element, an axial through hole is formed between the first end and the second end of the valve sleeve, a radial through hole communicated with the axial through hole is formed in the valve sleeve, the ejector rod stretches into the axial through hole of the valve sleeve from the pneumatic shell through the first end, the valve element is arranged in the axial through hole of the valve sleeve, the valve element is located between the ejector rod and the second end, the valve element is connected with the valve sleeve in a sliding seal mode, a limiting structure allowing the ejector rod to pass but prevent the valve element from passing is arranged in the axial through hole of the valve sleeve, the limiting structure is located between the first end and the radial through hole, and the valve element is located between the limiting structure and the second end; the distance between the end, away from the valve sleeve, of the pneumatic shell and the limiting structure is larger than the length of the ejector rod.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a pneumatic shut-off valve. Background technique [0002] Pneumatic cut-off valves are often used in high-pressure medium pipelines or devices to cut off the medium. It controls high-pressure fluid through low-pressure gas, and can realize remote control in a timely and effective manner to ensure tight sealing. [0003] Such as figure 1 As shown, the existing pneumatic globe valve includes a pneumatic housing 1, a push rod 2, a valve sleeve 3, a valve body 4 and a valve core 5, the valve body 4 has a valve cavity 401, an inlet 402 and an outlet 403, and the inlet 402 is perpendicular to the outlet 403 The valve sleeve 3 has an axial through hole 301 and a radial through hole 302 communicating with the axial through hole. The radial through hole 302 communicates with the valve cavity 401. Extending into the axial through hole 301 of the valve sleeve 3, the spool 5 is located in t...

AI Technical Summary

Problems solved by technology

The ejector rod 2 and the pneumatic casing 1 will be seriously damaged when they are subjected to high pressure for a long time, and when the high pressure reaches a certain level, components such as the pneumatic casing 1, ejector rod 2 and valve core 5 will be blown away, causing objects to strike ACCIDENT

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