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Method and device for intelligent diagnosis and location of leakage fault of fluid delivery pipeline

A technology for fluid delivery and fault diagnosis, used in fluid tightness testing, measuring devices, testing of machine/structural components, etc.

Inactive Publication Date: 2003-08-13
NORTHEASTERN UNIV
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  • Summary
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Problems solved by technology

[0003] Aiming at the problems existing in the existing fluid conveying pipeline leakage monitoring technology, the present invention provides a real-time sampling of pipeline operating parameters as few as possible, intelligent, anti-noise, high sensitivity, accurate positioning, applicable to Various fluid conveying pipelines, fluid conveying pipeline leakage location methods and devices, which can correctly distinguish between normal adjustment of pipelines and different working conditions of leakage failures

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  • Method and device for intelligent diagnosis and location of leakage fault of fluid delivery pipeline
  • Method and device for intelligent diagnosis and location of leakage fault of fluid delivery pipeline
  • Method and device for intelligent diagnosis and location of leakage fault of fluid delivery pipeline

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Embodiment Construction

[0060] Refer to figure 1 The device of the present invention is composed of pressure (P), flow (F), temperature (T) detection instruments installed at the first and last stations, an upper computer, a lower computer, a local area network, and a GPS global positioning time calibration system.

[0061] Refer to figure 2 The device converts the pressure, temperature and flow of the fluid in the first or last station pipeline into standard electrical signals (pressure and temperature are 4-20mA current signals, and the flow is a pulse signal through corresponding pressure, flow and temperature detection instruments. ). The lower computer is composed of filter board, A / D converter, counting board (I / O board), embedded microcomputer and GPS receiving board. The 4-20mA standard current signal is filtered by the filter board and sent to the A / D converter to become a digital signal. After the flow pulse signal is isolated and shaped by the filter board, it is sent to the counting board (...

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Abstract

An intelligent device and method for diagnosing and positioning the leakage of fluid delivery pipeline are disclosed. Said method includes detecting leakage by delivery difference-pressure wave coupling method, and positioning by transient pressure wave locating method to calculate the leakage position. Its device is composed of the start and end stations to which the pressure flow and temp meters, upper-layer set and lower-layer set are mounted, communication network for real-time data exchange, and GPS correction system.

Description

Technical field [0001] The invention belongs to the technical field of fault diagnosis, and particularly relates to a method and a device for detecting and locating leakage of a fluid conveying pipeline. Background technique [0002] Due to fluid leakage in long-distance fluid pipelines, fire, explosion, poisoning, etc. may occur, causing huge economic losses and environmental pollution. Therefore, pipeline online non-destructive testing technology is a high-tech developed by developed countries in the pipeline industry. It has been studied at home and abroad. The existing pipeline leakage monitoring and leak location methods can be roughly divided into two categories: one is the leakage detection method of the flow state in the pipe where the physical parameters such as flow and pressure change due to leakage; the other is the direct detection of fluid (oil, Water, gas) leak detection outside the pipe or pipe wall condition method. With the rapid development of computer technolo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/02G01M3/00
Inventor 张化光于锡纯冯健黎明
Owner NORTHEASTERN UNIV
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