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Gas extraction negative-pressure pipeline leakage detecting device and method

A technology of gas drainage and negative pressure, which is applied in the pipeline system, gas/liquid distribution and storage, mechanical equipment, etc., can solve the problems of low leakage detection efficiency and inability to locate the leakage point in time, so as to achieve safety hazards without electrification and no leakage Potential safety hazards and the effect of reducing gas explosion accidents

Inactive Publication Date: 2019-04-12
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a gas drainage negative pressure pipeline leakage detection device and method to overcome the existing defects such as low leakage detection efficiency and inability to locate leakage points in time

Method used

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  • Gas extraction negative-pressure pipeline leakage detecting device and method
  • Gas extraction negative-pressure pipeline leakage detecting device and method
  • Gas extraction negative-pressure pipeline leakage detecting device and method

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Embodiment

[0025] Such as figure 1 As shown, a gas drainage negative pressure pipeline leakage detection device includes a distributed optical fiber sensor 2 , a head-end coupler 4 , a Faraday rotating mirror, a photoelectric signal detection system 11 and a computer signal processing system 12 . The distributed optical fiber sensor 2 is arranged in the gas drainage negative pressure pipeline, which includes the gas drainage main pipe 1 and the gas drainage branch pipe 10, and the Faraday rotating mirror includes Faraday rotating mirror 1 5 and Faraday rotating mirror 2 6. The end of the distributed optical fiber sensor in the gas drainage main pipe 1 is equipped with a Faraday rotating mirror 1, the end of the distributed optical fiber sensor in the gas drainage branch pipe 10 is equipped with a Faraday rotating mirror 2 6, and the distributed optical fiber in the gas drainage branch pipe 10 The sensor is connected to the distributed optical fiber sensor in the gas drainage main pipe 1 ...

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Abstract

The invention discloses a gas extraction negative-pressure pipeline leakage detecting device and method. The pipeline leakage detecting device comprises a distributed optical fiber sensor, a first-endcoupler, a Faraday rotation mirror, a photoelectric signal detection system and a computer signal processing system. The distributed optical fiber sensor is arranged in a gas extraction negative-pressure pipeline. The Faraday rotation mirror is arranged at the tail end of the distributed optical fiber sensor. The first-end coupler is arranged at the front end of the distributed optical fiber sensor and connected with the photoelectric signal detection system, and the photoelectric signal detection system is connected with the computer signal processing system. According to the pipeline leakage detecting device, through photoelectric signal conversion and signal optimization treatment, whether leakage happens in the gas extraction negative-pressure pipeline or not can be detected in time,the leakage point can be accurately positioned, a leakage detection system is high in safety index and good in stability performance, and the detection efficiency and the positioning precision are greatly improved.

Description

technical field [0001] The invention relates to pipeline leakage detection, in particular to a gas drainage negative pressure pipeline leakage detection device and method. Background technique [0002] Due to the continuous improvement of my country's coal mining technology and the increase of mining speed, the amount of gas gushing out of coal mines continues to increase, which seriously threatens underground safety. Therefore, it is necessary to increase the extraction and utilization of underground gas and reduce the gas gushing during mining To ensure the safe production of coal mines. However, in most mines in my country, the gas drainage pipelines are mostly laid in the return airway. The maintenance ability of the return airway is poor and the external conditions of the roadway are poor. The gas drainage pipeline is prone to rust and rupture in the roadway, resulting in Pipe leaks. Since the gas extraction pipeline is under negative pressure extraction, once the pipel...

Claims

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Application Information

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IPC IPC(8): F17D5/02
CPCF17D5/02
Inventor 林柏泉赵洋李庆钊李兵张桂韵张祥良
Owner CHINA UNIV OF MINING & TECH
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