High-pressure pressure-reducing valve set

Abstract

The invention relates to a high-pressure pressure-reducing valve set which comprises a main pressure-reducing valve, a guide valve and two safety valves respectively having safety actions on the guide valve and the main pressure-reducing valve, wherein the guide valve and the two safety valves are all arranged on the main pressure-reducing valve; the main pressure-reducing valve is arranged on anair inlet flow channel on the rear part of a filter and communicated with an inlet flow channel of the guide valve through a lower connecting pipe; an outlet flow channel of the guide valve is communicated with a pressure regulating flow channel on the upper part of the main pressure reducing valve arranged on a pressure regulating joint and inlet flow channels of the safety valves, and a discharge pipe arranged on the pressure regulating joint is communicated with an air outlet flow channel arranged on the main pressure-reducing valve; the main pressure-reducing valve is provided with a connecting seat, and a through hole on the connecting seat is communicated with the air outlet flow channel of the main pressure-reducing valve; and the air outlet flow channel of the main pressure-reducing valve is connected and communicated with the inlet flow channels of the safety valves arranged on the connecting seat. The invention has compact structure, small volume and small occupied space. Due to the adoption of a combined valve structure, the pressure-reducing valve set has light weight, safety and convenient maintenance. Because the main pressure-reducing valve has the function of automatically balancing back pressure, the pressure-reducing precision is high.

Description

technical field [0001] The invention relates to a high-pressure decompression valve group, which belongs to the technical field of decompression valves. Background technique [0002] The pressure reducing valve is mainly used for throttling and reducing the pressure of the fluid gas, but most of the pressure reducing valves currently reduce the pressure of the gas at about 1MPa. Decrease in order to meet the requirements of work pressure. Therefore, the pressure-reducing valve group for high-pressure gas is not only complicated in structure, but also has a large volume. Since the outlet pressure of each pressure-reducing valve is not easy to control, the precision of pressure regulation is low. Contents of the invention [0003] The purpose of the present invention is to provide a high-pressure decompression valve group with compact structure, small volume, automatic back pressure balance and high pressure regulation precision. [0004] The technical solution of the pres...

AI Technical Summary

Problems solved by technology

Therefore, the pressure reducing valve group for high pressure gas is not only complex in structure and large in size, but also the pressure regulation accuracy is low because the outlet pressure of each pressure reducing valve is not easy to control

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