Gas delivery pipeline tail station trunk line pressure drop rate monitoring and alarming interlocking device and method

A technology of interlocking devices and gas pipelines, applied in pipeline systems, gas/liquid distribution and storage, mechanical equipment, etc., can solve problems such as environmental pollution of people and property, monitoring of oil pipeline leakage, and aggravation of accident consequences. The effects of equipment investment and construction costs, improvement of pipeline integrity, and timely alarm speed

Active Publication Date: 2019-04-02
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Gas delivery pipeline tail station trunk line pressure drop rate monitoring and alarming interlocking device and method
  • Gas delivery pipeline tail station trunk line pressure drop rate monitoring and alarming interlocking device and method
  • Gas delivery pipeline tail station trunk line pressure drop rate monitoring and alarming interlocking device and method

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Effect test

Embodiment 1

[0039] like figure 1 As shown, Embodiment 1 of the present invention is a pressure drop rate monitoring and alarm interlocking device for the main line of the terminal station of a gas transmission pipeline. The device includes:

[0040] The inbound emergency cut-off valve 3 is arranged on the inbound pipeline 1 and connected to the junction box 19 through the first cable 20;

[0041] The emptying pipeline 7 is connected with the emergency cut-off valve 3 for entering the station through the pressure introduction pipeline 10;

[0042] The first pressure transmitter 15 and the second pressure transmitter 18 are arranged in parallel between the pressure pipeline 10 and the junction box 19, and are respectively connected to the junction box 19 through the second cable 21 and the third cable 22 ;

[0043] The controller is connected with the junction box 19 through the fourth cable 23 .

[0044] Further, the inbound pipeline 1 is connected with the vent pipeline 7 through the f...

Embodiment 2

[0056] Such as figure 2 As shown, Embodiment 2 of the present invention is an interlocking method for monitoring and alarming the pressure drop rate of the main line of the terminal station of a gas transmission pipeline, the method comprising:

[0057] Step 1. Set the critical value ΔP of the pressure drop rate of the trunk line at the end station of the gas pipeline sp , the continuous judgment time of the pressure drop rate is n seconds, the alarm delay action time is T seconds, and the number of times k of the pressure drop rate exceeds the set value continuously is 0;

[0058] Step 2, the first pressure transmitter 15 or the second pressure transmitter 18 collects the pressure signal of the main line of the terminal station of the gas transmission pipeline, and sends the collected pressure signal to the controller;

[0059] Step 3. The controller starts to calculate the pressure drop value, and takes the average value of 4 consecutive sampling pressures as a group, and ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17D5/00F17D5/06
CPCF17D5/005F17D5/06
Inventor 聂中文黄晶王永吉于永志
Owner BC P INC CHINA NAT PETROLEUM CORP
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