A leakage positioning method for urban non-metallic pipelines based on inverse transient model

A pipeline leakage and transient model technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as loss, damage leakage, casualties and property, and achieve an easy-to-achieve effect

Active Publication Date: 2018-12-18
CHANGZHOU UNIV
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Problems solved by technology

But at the same time, the pipeline leaked due to problems such as quality and third-party damage, causing casualties and property losses

Method used

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  • A leakage positioning method for urban non-metallic pipelines based on inverse transient model
  • A leakage positioning method for urban non-metallic pipelines based on inverse transient model
  • A leakage positioning method for urban non-metallic pipelines based on inverse transient model

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Embodiment Construction

[0044] The present invention will now be described in detail in conjunction with examples. This figure is a simplified schematic diagram only illustrating the basic structure of the present invention in a schematic manner, so it only shows the components relevant to the present invention.

[0045] Such as figure 1 As shown, an urban non-metallic pipeline leakage location method based on the inverse transient model, this method is mainly used to detect the leakage under large flow pressure in urban pipelines with complex bends, many valves, instruments and branch pipes, Include the following steps:

[0046] S1: Use AnsysIcem to model the pipeline system 1, and use Fluent software to simulate.

[0047] Such as figure 2 As shown, the experimental pipeline system 1 adopts a branched and bent pipeline structure formed by multi-section pipeline connections, and multiple pressure sensors 3 are installed on the pipeline system 1, and flowmeters 2 are installed on the upstream and ...

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Abstract

The invention provides a leakage positioning method for urban non-metallic pipelines based on an inverse transient model, which uses Fluent software to simulate the pressure, flow rate, velocity distribution and other parameters of the non-metallic pipeline in the leakage state and the leakage-free state, and finds out the regularity of each parameter varying with time and space under the two states; the leakage simulation tests of non-metallic buried pipelines are carried out in laboratory, and the flow rate, velocity and pressure parameters of the pipelines are measured under leakage and non-leakage conditions respectively. The inverse transient model of non-metallic pipeline leakage state is established and the experimental data are analyzed according to the variation law of parametersobtained by simulation software. By using global and local algorithms, the best convergence target parameters Jk and tau k are determined, and the pressure measuring head calculated by the transient solver is obtained. The calculated pressure measuring head and the experimental pressure measuring head are substituted into the inverse transient model to determine the size and positioning of leakage. Compared with the prior art, the method only needs to measure pipeline pressure and flow parameters, and is easy to realize.

Description

technical field [0001] The invention relates to the technical field of leakage detection of urban non-metallic pipelines, in particular to a method for locating leakage of urban non-metallic pipelines based on an inverse transient model. Background technique [0002] Non-metallic pipes have the advantages of high strength, low density, strong corrosion resistance, excellent insulation, and long service life. The increasing demand in petrochemical industry, construction industry, municipal engineering, agriculture and other fields has promoted the rapid development of non-metallic pipes. . But at the same time, the pipeline leaks due to problems such as quality and third-party damage, causing casualties and property losses. The safety situation of pipelines is very serious, and factors such as leakage, fire and explosion are increasingly concerned by the public. In order to ensure the safe operation of urban pipelines, it is necessary to develop pipeline leakage detection t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 郝永梅李金洁杜璋昊杨强吴雨佳
Owner CHANGZHOU UNIV
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