Small integrated high-pressure pneumatic control valve

Abstract

The invention provides a small integrated high-pressure pneumatic control valve, and solves the problems that an existing pneumatic control stop valve is relatively complex in structure and difficultto adapt to a large-vibration-force environment. The small integrated high-pressure pneumatic control valve comprises a shell, a valve element, a spring, a spring seat and a sealing assembly; an inletflow channel, a medium channel, a mounting cavity, a spring cavity and a control cavity which are sequentially communicated are formed in the shell; an outlet flow channel communicated with the medium channel is formed in the side wall of the shell; the valve core comprises a first blocking section, a second blocking section, a third blocking section and a fourth blocking section which are coaxially arranged in sequence; the first blocking section is located at the joint between the inlet flow channel and the medium channel; the second blocking section is arranged in the medium channel; the third blocking section is arranged in the mounting cavity, and a sealing assembly is arranged between the third blocking section and the mounting cavity; the fourth blocking section is arranged in thespring cavity, and an external thread is arranged at one end close to the control cavity; a small end of the spring seat is provided with a threaded hole connected with the fourth blocking section, and the outer circular surface of a large end is axially provided with a plurality of notches which are uniformly distributed along the circumference; an annular limiting boss is arranged on the springcavity; and the spring sleeves the fourth blocking section.

Description

technical field [0001] The invention relates to a high-pressure air control valve, in particular to a small integrated high-pressure air control valve for controlling medium on-off. Background technique [0002] In the high-pressure medium control system, air-operated shut-off valves are generally used to control the on-off of the main channel medium. The valve is open for ventilation and closed for degassing, has simple control, can be used repeatedly, and has a wide range of flow control. [0003] At present, most of the shells used in commonly used air-operated globe valves are split structures, including the medium chamber shell and the control chamber shell, which are connected into one body through threads or flanges. Two dynamic sealing structures are required to seal the medium and gas respectively, which makes the structure of this kind of air-operated globe valve relatively complicated, and because the medium chamber shell and the control chamber shell are connect...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem that the structure of the existing air-operated stop valve is relatively complicated and it is difficult to adapt to the large-vibration dynamic environment, the present invention provides a small integrated high-pressure air-operated valve

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