Air pressure type rapid switching valve

Abstract

The invention relates to an air pressure type rapid switching valve which comprises two large parts, namely a valve body and an air source. The valve body is composed of a shell, a center shaft, an air cylinder, front and rear sealing assemblies, a pipe nozzle and the like. The air source is composed of a sealed air tank and an affiliated valve, pipeline and the like. When a two-position four-way valve for controlling the flowing direction of the air source is in a powered-off state, the front side of the air cylinder is inflated, the rear side of the air cylinder is deflated, the air cylinder presses the front and rear sealing assemblies, and the valve is in a closed state. Otherwise, when the two-position four-way valve for controlling the flowing direction of the air source is in a powered-on state, the rear side of the air cylinder is inflated, the front side of the air cylinder is deflated, and the valve is opened. The air pressure type rapid switching valve is mainly applied to a sub-tran-supersonic wind tunnel and used as a rapid valve, the opening or closing time is not longer than 1s, the opening and closing frequency every year is 15000, the repair cycle is 1 year, and the service life is 10 years.

Description

technical field [0001] The invention relates to a pneumatic quick switch valve, in particular to a wind tunnel compressed air control switch valve, which belongs to the field of valves. Background technique [0002] The sub-span super wind tunnel is a high-speed wind tunnel with a speed range of Mach number 0.4<M≤4.5. The typical sub-span super wind tunnel structure consists of air source, main valve, fast valve, pressure regulating valve, front chamber, nozzle, test sections, outlets, etc., as attached Figure 6 hint. During the test, the compressed air in the air source passes through the main valve→fast valve→pressure regulating valve and then enters the front chamber for rectification, the speed is adjusted by the nozzle, and it is discharged from the outlet after the test in the test section. In addition, some wind tunnels integrate the functions of the fast valve and the pressure regulating valve, and a fast pressure regulating valve realizes the functions of fast ...

AI Technical Summary

Problems solved by technology

After super-strength repeated opening and closing, some unsolvable problems are gradually exposed, such as the gasket is easy to be blown out after wear, the gasket must be lined with reinforcing ribs, hydraulic pipes and pipe joints are subject to long-term vibration and oil leakage, and hydraulic vibration is large. The hydraulic station has been charged for a long time and the temperature rises too fast, etc.

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