An air-controlled gas pressure reducer

Abstract

The invention provides a pneumatic-control type pressure reducer and belongs to the technical field of conveying and supplying of high-pressure and intermediate-pressure media. The pneumatic-control type pressure reducer comprises an input cavity, an output cavity, a damping cavity, a control cavity, a throttling assembly, a sensing assembly, an upper valve body, a middle valve body, a lower valve body and an isolation tray. The input cavity is an annular containing cavity defined by the upper valve body, the middle valve body located on the bottom face of the cavity, and the throttling assembly located in the center of the cavity. The output cavity is an annular containing cavity defined by the middle valve body, the isolation tray located on the bottom face of the cavity, and the throttling assembly located on the upper base of the cavity. The damping cavity and the control cavity are defined by the middle valve body, the lower valve body and the isolation tray. The control cavity is used for inflating control gas. The damping cavity is used for inflating output gas with the pressure being reduced. The throttling assembly is used for reducing and stabilizing the pressure of high-pressure gas and isolating the input cavity from the output cavity. The sensing assembly is used for sensing pressure regulating signals and working parameters of the pressure reducer, then transmitting the pressure regulating signals and the working parameters to the throttling assembly and isolating the damping cavity from the control cavity. By means of the pressure reducer, pressure reduction and stabilization of large-flow gas can be achieved rapidly and stably.

Description

technical field [0001] The invention belongs to the technical field of aerospace, and specifically relates to the technical field of high-pressure and medium-pressure medium transportation and supply. Background technique [0002] The pressure reducer is a kind of regulating valve, which reduces the inlet pressure to the required outlet pressure value through the throttling effect of the valve core, and controls the opening of the valve core through the feedback of the outlet pressure to maintain the stability of the outlet pressure. It can be seen that the function of the pressure reducer is to decompress the upstream gas pressure and stabilize it at the desired value. In fact, the pressure reducer uses the throttling effect of the airflow to achieve pressure regulation. Generally, when the high-pressure gas passes through the narrow cross-section between the valve core and the valve seat, a throttling phenomenon occurs, and a part of the pressure energy is converted into ...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the technical problem that the existing pressure reducer cannot realize the direct decompression of the high-pressure gas above 20MPa with a flow rate greater than 10kg / s to a state below 10MPa and stabilize the pressure

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