Gas pipeline leakage detection device and method based on infrasonic waves

A technology for leak detection device and gas pipeline, which is applied to measuring device, can solve the problems of false alarm of operation status, missed detection of small leaks, pipeline leakage, etc. by detecting the appearance of fluid at the leak point, pipeline system, etc. The effect of increased performance, strong operability, and small observation error

Active Publication Date: 2020-12-11
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As the natural gas pipeline grows in age, pipeline leakage accidents will occur frequently over time. Considering the high pressure of natural gas pipelines, once a leak occurs, it will inevitably cause a lot of energy waste and serious environmental damage.
[0003] In the past few decades, researchers in this field have proposed a variety of pipeline leak detection methods, but each method has different limitations, such as missed detection of small leaks, false alarms of operating status, etc.

Method used

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  • Gas pipeline leakage detection device and method based on infrasonic waves
  • Gas pipeline leakage detection device and method based on infrasonic waves
  • Gas pipeline leakage detection device and method based on infrasonic waves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Embodiment 1: as figure 1 As shown, a gas pipeline leakage detection device based on infrasonic waves includes a pressure sensing component, a temperature sensing component, an infrasonic wave generating device 3, an infrasonic wave receiving device 5, a leakage valve 4 and a computer, a pressure sensing component 1, a temperature sensor The sensing member 2, the infrasonic wave generating device 3, and the infrasonic wave receiving device 5 are all arranged on the gas transmission pipeline, the infrasonic wave generating device 3 is located upstream of the infrasonic wave receiving device 5, and the leakage valve 4 is arranged on the gas transmission pipeline and located between the infrasonic wave generating device 3 and the infrasonic wave receiving device. Between the devices 5, the pressure sensing component, the temperature sensing component, the infrasonic wave generating device 3, the infrasonic wave receiving device 5, and the leakage valve 4 are all connected t...

Embodiment 2

[0070] Embodiment 2: The gas pipeline leakage detection method based on infrasonic waves adopts the gas pipeline leakage detection device based on infrasonic waves in Embodiment 1, and the specific steps are as follows:

[0071] (1) The leakage valve of the computer is closed, and the upstream infrasonic wave generating device is controlled to emit infrasonic waves with a fixed frequency. The downstream infrasonic wave receiving device receives and collects the infrasonic waves transmitted through the gas pipeline and transmits the collected infrasonic waves to the computer. The computer filters the collected infrasonic waves to obtain Under normal working conditions, the attenuation diagram of the infrasonic amplitude without leakage;

[0072] (2) The computer controls the leakage valve to open to the preset caliber, controls the upstream infrasonic wave generating device to emit the same fixed frequency infrasonic wave as in step (1), and the downstream infrasonic wave receiv...

Embodiment 3

[0080] Embodiment 3: A gas pipeline leakage detection method based on infrasonic waves, using the gas pipeline leakage detection device based on infrasonic waves in Embodiment 1, the specific steps are as follows:

[0081] (1) The leakage valve of the computer is closed, and the upstream infrasonic wave generating device is controlled to emit infrasonic waves with a fixed frequency. The downstream infrasonic wave receiving device receives and collects the infrasonic waves transmitted through the gas pipeline and transmits the collected infrasonic waves to the computer. The computer filters the collected infrasonic waves to obtain Under normal working conditions, the attenuation diagram of the infrasonic amplitude without leakage;

[0082] The computer performs filtering processing on the collected infrasound wave, and the computer performs denoising processing on the infrasound wave signal. The denoising process is as follows:

[0083] 1) Perform preprocessing operations such ...

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Abstract

The invention relates to a gas pipeline leakage detection device and method based on infrasonic waves, and belongs to the technical field of pipeline monitoring. The device comprises a pressure sensing component, a temperature sensing component, an infrasonic wave generating device, an infrasonic wave receiving device, a leakage valve and a computer, wherein the pressure sensing component, the temperature sensing component, the infrasonic wave generating device and the infrasonic wave receiving device are all arranged on a gas conveying pipeline, the infrasonic wave generating device is located on the upstream of the infrasonic wave receiving device, the leakage valve is arranged on the gas conveying pipeline and located between the infrasonic wave generating device and the infrasonic wavereceiving device, and the pressure sensing component, the temperature sensing component, the infrasonic wave generating device, the infrasonic wave receiving device and the leakage valve are all connected with the computer. According to the gas pipeline leakage detection device and method, whether leakage happens to the pipeline or not and the leakage hole diameter are judged through an amplitudechange curve of infrasonic waves.

Description

technical field [0001] The invention relates to a gas pipeline leakage detection device and detection method based on infrasonic waves, and belongs to the technical field of pipeline monitoring. Background technique [0002] As the natural gas pipeline grows in age, pipeline leakage accidents will occur frequently over time. Considering the high pressure of natural gas pipelines, once a leak occurs, it will inevitably cause a lot of energy waste and serious environmental damage. [0003] In the past few decades, researchers in this field have proposed a variety of pipeline leak detection methods, but each method has different limitations, such as missed detection of small leaks and false alarms of operating status. Contents of the invention [0004] Aiming at the deficiencies of the gas transmission pipeline leakage detection method in the prior art, the present invention provides a gas transmission pipeline leakage detection device and detection method based on infrasonic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17D5/06F17D5/00G01M3/24
CPCF17D5/06F17D5/005G01M3/243
Inventor 王修武周桂久熊坤马文敏姜子涵宋鹏云高雪融王峥
Owner KUNMING UNIV OF SCI & TECH
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