Interlocking device and method for monitoring and alarming pressure drop rate of trunk line at terminal station of gas transmission pipeline

Abstract

The invention discloses a gas delivery pipeline tail station trunk line pressure drop rate monitoring and alarming interlocking device and method. The device comprises an incoming emergency cut-off valve, an emptying pipe, a first pressure transmitter, a second pressure transmitter and a controller. The incoming emergency cut-off valve is arranged on an incoming pipeline. The emptying pipe is connected with the incoming emergency cut-off valve through a pressure leading pipeline. The first pressure transmitter and the second pressure transmitter are connected in parallel between the pressure leading pipeline and a wiring box. The controller is connected with the wiring box through a fourth cable. The gas delivery pipeline tail station trunk line pressure drop rate monitoring and alarming interlocking device and method have the beneficial effects that the trunk line pipeline explosion monitoring and alarming of a gas conveying pipeline branch conveying station is more timely and higherin accuracy so as to improve the safety of gas delivery pipelines, surrounding personnel and property. Meanwhile, the position of pipe explosion can be estimated, and the integrity and running safetyof pipelines can be improved. Therefore, gas delivery pipeline explosion monitoring tends to be more practical, and equipment investment and construction costs are reduced.

Description

technical field [0001] The invention relates to the technical field of pipeline systems, in particular to an interlocking device and method for monitoring and alarming the pressure drop rate of a main line of a terminal station of a gas transmission pipeline. Background technique [0002] During the operation of the pipeline, due to pipeline corrosion, third-party damage, construction quality and other reasons, the natural gas pipeline ruptures or breaks, resulting in natural gas leakage, which eventually brews into an oil and gas pipeline safety accident, causing great adverse effects on society and enterprises. It has also brought a serious threat to the safety of life and property of the people around the pipeline. If the relevant information such as whether the pipeline is broken or broken is not grasped in time and dealt with in time, the consequences of the accident will continue to increase, causing serious environmental pollution and significant personal and property...

AI Technical Summary

Problems solved by technology

[0002] During the operation of the pipeline, due to pipeline corrosion, third-party damage, construction quality and other reasons, the natural gas pipeline ruptures or breaks, resulting in natural gas leakage, which eventually brews into an oil and gas pipeline safety accident, causing great adverse effects on society and enterprises. It also poses a serious threat to the life and property safety of the people around the pipeline.

If the relevant information such as whether the pipeline is broken or broken is not grasped in time and dealt with in a timely manner, the consequences of the accident will continue to increase, causing serious environmental pollution and major personal and property losses.

[0003] For gas pipeline leakage caused by pipeline corrosion, third-party damage, construction quality, etc., since natural gas is a compressible fluid, previous projects could not use the oil pipeline method for leakage monitoring, and it was impossible to realize emergency shutdown of the transmission system in case of abnormal conditions The emergency shutdown function of entering and exiting stations, so that only when there are major accidents such as natural gas leakage, fire or explosion that can be observed by human eyes, relevant problems can be found

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