A Method of Gas Pipeline Leakage Detection and Location Based on Mathematical Model

Abstract

The invention discloses a mathematical model based positioning method of gas pipe leakage detection. A pressure sensor collects pressure values, which change with time, of the two ends and middle position of a pipe in different time, test physical parameters are substituted into an mathematical model and the original mathematical model is simplified via intelligent algorithm software, data information obtained by test is operated via the algorithm software to obtain a serials of suspected leakage positions, and the data is processed to obtain a final leakage position. The pressure values in the two ends and the middle portion of the pipe are measured, steps to measure the pressure intensity in the pipe can be simplified, and the more accurate leakage point position can be obtained. The measured pressures in the pipe serve as input variables of the mathematical model, an output quantity of the model is the position of the leakage point, the operation process is simple, the positioning precision is high, less time is consumed, and the positioning for leakage detection is efficient.

Description

technical field [0001] The invention relates to the technical field of pipeline leak detection, in particular to a method for detecting and locating gas pipeline leakage based on a mathematical model. Background technique [0002] In a large-scale device like a tokamak, it is often equipped with various complex-shaped transportation pipelines. The good sealing of the pipeline can ensure the normal operation of the entire device. In reality, the method of vacuum leak detection and positioning is often used to check the pipeline. Sealing, the existing vacuum leak detection and location methods are mainly positive pressure bubbling method, positive pressure suction gun method and negative pressure helium injection method, but the detection effect is not good for long-distance and large-scale pipelines placed in complex structures. The operation is difficult, and these leak detection and positioning methods must break the vacuum environment of the tokamak vacuum chamber, which l...

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Problems solved by technology

[0002] In a large-scale device like a tokamak, it is often equipped with various complex-shaped transportation pipelines. The good sealing of the pipeline can ensure the normal operation of the entire device. In reality, the method of vacuum leak detection and positioning is often used to check the pipeline. Sealing, the existing vacuum leak detection and location methods are mainly positive pressure bubbling method, positive pressure suction gun method and negative pressure helium injection method, but the detection effect is not good for long-distance and large-scale pipelines placed in complex structures. The operation is difficult, and these leak detection and positioning methods must break the vacuum environment of the tokamak vacuum chamber, which leads to the need to clean the vacuum chamber and restore the vacuum state after the pipeline leak detection and positioning is completed. The positioning process is cumbersome and time-consuming

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