Gas pressure regulation system with stable transmission of detection gas pressure

Abstract

The invention discloses a gas pressure regulation system with stable transmission of detection gas pressure. A stop valve is stable in performance, an internal tripping mechanism can avoid that the stop valve is wrongly closed due to influences of external impact, a reliable guarantee is provided for improvement on accuracy of detection gas pressure of the stop valve. For the stop valve, a condition that a stop valve signal pipe in a conventional stop valve is directly connected with a senor part is changed. According to the invention, the signal pipe is firmly and tightly connected with a pipe joint, even if the signal pipe and the pipe joint are used for a long term, the connecting part of the signal pipe and the pipe joint is prevented from cracking, falling off and the like, the condition that the connecting part is unstable is avoided. Therefore, gas pressure leakproofness is guaranteed, the detection effect of the sensor is not influenced, the improvement on performance and prolonging of the service life of the stop valve are facilitated. The stable transmission of detection gas pressure P2 can be guaranteed for the whole gas pressure regulation system; and normal operation of the whole gas pressure regulation system can be guaranteed.

Description

technical field [0001] The invention relates to a gas pressure regulating system, in particular to a gas pressure regulating system capable of detecting stable transmission of air pressure. Background technique [0002] With the change of my country's energy structure and the continuous increase of environmental protection, the development and utilization of natural gas have developed rapidly. Compressed natural gas is purified and compressed wellhead natural gas or pipeline natural gas, which is stored and transported under high pressure, reaches the point of use, and is directly input into the pipeline network to supply various users after multi-stage heat exchange and pressure regulation. City gas generally needs to be regulated by a pressure regulating device before it can be finally used by the user. The gas pressure regulating device is generally composed of several functional modules, such as the pressure regulator to realize the pressure regulation function; the filt...

AI Technical Summary

Problems solved by technology

It is generally required that the safety cut-off valve has its own corresponding strength. When the air pressure at the pressure-taking point exceeds the expected set value, it is also very necessary for the cut-off valve to cut off accurately, because the following situations will occur in actual use: After the air pressure is abnormal, the cut-off valve does not cut off, or when the air pressure at the pressure point is normal, the cut-off valve is accidentally cut off due to impact or other external influences

In the existing cut-off valve, the signal pipe of the cut-off valve is directly connected to the sensor part. After a period of use, the connection part is prone to cracks and easy to fall off; due to the instability of the connection part, it is easy to cause poor air pressure sealing and affect the detection of the sensor. Effect, affecting the performance and service life of the cut-off valve; at the same time, it is not conducive to the work of the entire pressure regulating system; so it needs to be improved

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