压力脉冲波法天然气管道堵塞检测研究*

Study on pressure pulse wave method for blockage detection in gas pipelines

摘要:

为快速检测出天然气管道堵塞位置、长度及堵塞程度，解决天然气输运管道中堵塞定位难题，探讨压力脉冲波法管道堵塞检测的可行性与效果。搭建长220 m的压力脉冲波堵塞检测实验系统，进行多组连续性长堵塞检测实验和水堵检测实验。结果表明：连续性长堵塞检测实验中堵塞前沿反射信号为负压波，堵塞后沿信号为正压波，且波形清晰可辩，其多组实验的堵塞位置、堵塞长度及堵塞率的平均检测误差分别为0.23%，0.75%和2.67%；水堵反射信号清晰可辨但波形复杂，其多组实验的堵塞位置、堵塞长度及堵塞率的平均检测误差分别为0.78%，9.61%和43.28%。实验结果有效地证实了压力脉冲法的可靠性与实用性，并为压力脉冲波法堵塞检测现场应用提供指导。

Abstract:

To rapidly detect the location,length and degree of the blockage in natural gas pipelines,and solve the problem of blockage location in the natural gas transportation pipelines,the feasibility and effect of the pressure pulse wave method for blockage detection were discussed.A 220 m long experimental system of the pressure pulse wave for blockage detection was established,and multiple groups of continuous long blockage detection and water blockage detection tests were conducted.The results showed that in the continuous long blockage detection tests,the reflected signal of blockage frontier was the negative pressure wave,while the signal of blockage back was the positive pressure wave,and the waveform was clear and identifiable.The average detection errors of the blockage location,blockage length and blockage rate in multiple groups of tests were 0.23%,0.75% and 2.67%,respectively.In the water blockage detection tests,the reflected signals were clear,but the waveform was complex,and the average detection errors of blockage location,blockage length and blockage rate were 0.78%,9.61% and 43.28%,respectively.The experimental results effectively validated the reliability and feasibility of the pressure pulse wave method,and it provide guidance for the on-site application of pressure pulse wave method for blockage detection.