Outdoor aerial gas pipeline non-contact long-distance leakage detecting method

Abstract

The invention discloses an outdoor aerial gas pipeline non-contact long-distance leakage detecting method. The method comprises the following steps that a, a leakage detecting point is determined, specifically, the position of the to-be-detected leakage point is observed, and a pipeline joint position or a pipeline structure abnormal position is selected as the leakage detecting point; b, standingpoints are determined, specifically, after the leakage detecting point is determined, three standing points are arranged in a position right facing the leakage detecting point, a position 2-3 m deviating leftwards from the leakage detecting point and a position 2-3 m deviating rightwards from the leakage detecting point correspondingly; c, leakage detection is performed; d, data analyzing is performed; and e, data recording is performed. The method has the beneficial effects that by adopting an infrared detecting technology, by means of the characteristic that wavebands reflected by methane in light waves are inconsistent after natural gas is leaked, aerial long-distance outdoor aerial gas pipeline leakage detection is achieved, operation is easy, and the safety is high; and by measuringthe leakage detecting point from the multiple points in multiple directions, the gas leakage status can be evaluated comprehensively, and the detecting precision is improved.

Description

technical field [0001] The invention relates to the technical field of gas pipeline leakage detection, in particular to a non-contact remote detection method for outdoor overhead gas pipeline leakage. Background technique [0002] At present, the leak detection of gas pipelines is usually pump-suction and electronic catalytic detection. [0003] The current commonly used portable alarm leak detection uses semiconductor detection technology. The sensor used for detection is made of semiconductor materials that are sintered at high temperature with the addition of trace amounts of precious metal oxides such as gold, platinum and palladium. The conductivity of this sensor varies with the gas in the environment. The concentration changes to judge the measured gas concentration, and judge whether there is leakage and leakage according to the concentration value reflected by the sensor; [0004] The pump-suction leak detection instrument detects gas pipelines. Its technical chara...

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Problems solved by technology

[0005] The above two detection methods can only be used for close-range contact detection, and cannot be used for leak detection of outdoor overhead lines and high-altitude lines

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