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
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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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