H-Q characteristic curve-based pipeline breakage and leakage positioning method

A technology of characteristic curve and positioning method, applied in the field of leak detection, can solve the problems of high false alarm rate and failure to locate the leakage point of the pipeline, and achieve the effect of preventing pipeline overpressure and improving safety production capacity.

Active Publication Date: 2012-11-07
XIAN CHANGQING TECH ENG
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The above three types of leak detection methods all have their own defects, and fail to make timely and accurate positioning of pipeline leak points under various complex working conditions, resulting in a high rate of false alarms

Method used

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  • H-Q characteristic curve-based pipeline breakage and leakage positioning method
  • H-Q characteristic curve-based pipeline breakage and leakage positioning method

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Embodiment Construction

[0023] The head performance curve H-Q of the pump is a fixed curve when the pump type selection is determined and the speed is constant. Under normal working conditions, the pipeline characteristic h-Q curve changes with the change of the output Q (at h c′ -Q~h c -Q), which has an intersection point M with the head performance curve H-Q of the pump. When the pipeline breaks and leaks, the change of the pipeline characteristic h-Q curve exceeds the above-mentioned change range, and the monitoring and positioning system will alarm in time. The system automatically obtains the pipeline characteristic curve h and Q parameter values ​​corresponding to M′, and locates the leakage point through calculation. The current leakage point is displayed with a red flashing mark on the pipeline routing graph, and the alarm data is printed at the same time; quantity.

[0024] The steps of the pipeline leak location method based on the H-Q characteristic curve are:

[0025] A. Initialization...

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Abstract

The invention belongs to leakage detection technology, and relates to an H-Q characteristic curve-based pipeline breakage and leakage positioning method. The method is characterized by comprising steps A and B, wherein the step A comprises four sub-steps for initialization; and the step B comprises six sub-steps for monitoring and positioning to finish pipeline breakage and leakage positioning. The H-Q characteristic curve-based pipeline breakage and leakage positioning method has the advantages of performing timely and accurate judgment and positioning on the breakage and leakage of a pipeline running under a complex working condition so as to maximally reduce damage caused by the breakage and leakage of the pipeline, and simultaneously improving the security and the reliability of production running to ensure that each production process on the ground realizes continuously and stably running and fulfill the aims of saving energy, reducing consumption and improving economic benefit.

Description

technical field [0001] The invention belongs to the leakage detection technology, and relates to a method for locating broken pipelines based on H-Q characteristic curves. Background technique [0002] The safe operation of pipelines is an important part of pipeline management. Among all accidents that endanger pipeline safety, whether it is economic loss or damage to the environment, pipeline leakage accidents are the most harmful. is particularly important in management. Due to complex social conditions, man-made drilling and oil theft, third-party construction damage, operational errors, natural disasters, natural corrosion, etc. are the main reasons for pipeline leakage accidents. Economic loss, reducing environmental pollution is extremely important. [0003] At present, there are many kinds of pipeline leak detection and location technologies in the world. According to different measurement methods and detection objects, they can be roughly divided into direct and in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/28
Inventor 姬蕊杨世海林罡张箭啸冯宇张小龙王荣敏夏政梁晓寒张巧生
Owner XIAN CHANGQING TECH ENG
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