Pipe joint rapid leak hunting method

A technology for pipeline joints and leak detection, which is applied in the direction of measuring the rate of increase and deceleration of the fluid, using liquid/vacuum degree for liquid tightness measurement, etc., can solve the problem of affecting the reliability of the pipeline system, affecting the pressure test work of the system, increasing Project cost and other issues, to avoid quality accidents and unnecessary repeated engineering, improve safety and reliability, and simple methods

Inactive Publication Date: 2005-03-16
杜广才
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Problems solved by technology

[0002] With the development of underwater (such as seabed and river bottom) water delivery projects, more and more water delivery pipelines are laid on the bottom of the sea or river bottoms. The entire water delivery pipeline is connected by many sections of water delivery pipelines, and The quality of the joints connected between water pipelines directly affects the reliability of the entire pipeline system. If there is leakage or quality accidents at the joints, it will affect the pressure test work of the system, causing safety hazards, and repeated increases However, it is not feasible to manually find the leak point at the bottom of the water. How to quickly and accurately find the pipe joint with the leak point has always been a problem that plagues this type of project.

Method used

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[0008] In order to better understand the present invention, it will be further elaborated below in conjunction with the accompanying drawings and embodiments.

[0009] Take the polyethylene pipeline commonly used at present as an example, such as figure 1 As shown, the inner wall of the sleeve 1 close to both ends is provided with a heating wire 5 to make an electric fusion sleeve. After the pipeline interface is welded, the sleeve 1 of the leak detection device is placed on the interface, and the pipeline The interface weld 6 is located in the air cavity 2 of the sleeve 1, and the air intake valve 3 is installed on the air cavity 2. The sleeve 1 is fixed on the pipeline by electrofusion, and then the intake valve 3 on the sleeve 1 is Connect the high-pressure gas cylinder 4 equipped with a pressure gauge through the connecting pipe, open the high-pressure gas cylinder 4 to fill the air cavity 2 with high-pressure gas, and when the gas pressure in the gas cavity 2 reaches 1.5 ...

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Abstract

This invention provides a pipe joint leak hunting method, especially that of pipe joint of water bottom transmission engineering. It mainly locates the pipe joints into the apparatus full of high pressure gas inside and measure the leak through observing the changes of the high-pressure gas. This method is simple and convenient and quick and solves the main technique difficulty in the field.

Description

1. Technical field [0001] The invention discloses a method for detecting leaks of pipeline joints, in particular to a method for detecting leaks of pipeline joints used in underwater water delivery projects. 2. Background technology [0002] With the development of underwater (such as seabed and river bottom) water delivery projects, more and more water delivery pipelines are laid on the bottom of the sea or river bottoms. The entire water delivery pipeline is connected by many sections of water delivery pipelines, and The quality of the joints connected between water pipelines directly affects the reliability of the entire pipeline system. If there is leakage or quality accidents at the joints, it will affect the pressure test work of the system, causing safety hazards, and repeated increases However, it is not feasible to manually find the leak point at the bottom of the water. How to quickly and accurately find the pipe joint with the leak point has always been a problem ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/28
Inventor 杜广才
Owner 杜广才
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