Multi-stage gas pressure reduction device

Abstract

The invention discloses a multi-stage gas pressure reduction device. The multi-stage gas pressure reduction device comprises a first pressure reduction system, a second pressure reduction system and athird pressure reduction system which are used for generating a plurality of gradient pressure reduction ranges, wherein the pressure reduction range of the first pressure reduction system is largerthan that of the second pressure reduction system; the pressure reduction range of the second pressure reduction system is larger than that of the third pressure reduction system; the pressure reduction precision of the second pressure reduction system is higher than that of the first pressure reduction system; the pressure reduction precision of the third pressure reduction system is higher thanthat of the second reduction reduction system; the first pressure reduction system communicates with a gas input pipe; the third pressure reduction system communicates with a gas output pipe; the first pressure reduction system communicates with the second pressure reduction system through a first pipe connecting piece; and the second pressure reduction system communicates with the third pressurereduction system through a second pipe connecting piece. The pressure reduction precision and the pressure reduction ranges are different due to different gradients, hierarchical combined pressure reduction can be realized, and finally high-precision and large-range pressure reduction is realized.

Description

technical field [0001] The invention relates to the technical field of gas decompression, in particular to a multi-stage gas decompression device. Background technique [0002] Generally, gas decompression devices in the prior art include a pressure reducer body and a safety valve, and the safety valve is connected with the pressure reducer body and communicates with the low-pressure chamber in the pressure reducer body; the more detailed structure is as follows: , the gas line pressure reducer disclosed in Chinese utility model CN93247292.3 is more typical. Although the technology has been around for a long time, the products in the prior art are basically similar to the gas line pressure reducer in this technology. It includes a valve body , The external thread of the air inlet joint is fastened to the internal thread hole on the right side of the horizontal axis, the external thread of the air outlet joint is fastened to the internal thread hole on the left side of the ho...

AI Technical Summary

Problems solved by technology

There are many such gas decompression devices in the prior art, and the basic principles are similar, but they all have some common shortcomings. For example, in the traditional implementation technology, if the required high-precision decompression is set, The corresponding parts and equipment are relatively delicate, so the decompression range must be very small. If a large range of decompression is set, the corresponding accuracy cannot be controlled very high. In fact, even the single decompression range is large in the existing technology. Or there are very few products with high decompression accuracy alone, and there is no technology to ensure a large decompression range and decompression control accuracy

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