Urban gas buried pipeline leakage detection and locating method and applications thereof

Abstract

The invention discloses an urban gas buried pipeline leakage detection and locating method and applications thereof. Based on an acoustic emission technology and combined with the current gas pipeline laying situation of Changzhou city, layout schemes and relevant parameters of sensors are designed, and the leakage detection method under the situation of guaranteeing normal gas transmission of buried pipelines and not excavating pipelines is determined. Simultaneously, wavelet noise reduction and relevant analysis methods are introduced, and accordingly, the locating accuracy is improved, and objective and credible results are obtained. According to the urban gas buried pipeline leakage detection and locating method and applications thereof, the application of the acoustic emission detection technology in gas buried pipeline leakage detection is facilitated and improved to a large extent, and hence, while the method is effective and accurate in detection and cost saving, popularization and use values are increased, and the method has great significances in enhancement of urban gas buried pipeline risk control.

Description

technical field [0001] The invention relates to a leakage detection and positioning method of an urban gas buried pipeline and an application thereof, in particular to calculation of leakage detection and positioning of buried pipelines without stopping operation and excavation for inspection, and belongs to the field of oil and gas storage and transportation risk control. Background technique [0002] As one of the essential infrastructures of cities, the gas pipeline network has developed rapidly in many cities in recent years, and has made great contributions to purifying the urban air environment and improving people's living standards. However, pipeline leakage has always been a difficult problem in pipeline transportation since it was applied in industry. Especially with the continuous growth of urban gas pipeline network pipe age, coupled with construction defects and corrosion, as well as man-made damage, gas pipeline leakage often occurs. Due to the flammable, expl...

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Problems solved by technology

[0007] Huo Zhen used acoustic emission technology to detect pipeline leaks. Experiments have proved that it is feasible to detect gas and liquid leaks using leak acoustic emission signals, and has high sensitivity, but the problem is that it is difficult to accurately determine the location of the leak source and detect Sensitivity is affected by noise, etc.

[0009] Although there have been many researches on the leakage detection of buried pipelines, the research and testing of the tested gas pipelines without stopping operation and without excavation of suspicious leakage points or sensor layout points have not been clearly proposed.

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