Method for detecting tiny leakage of oil transmission pipeline

A technology for detection of oil pipelines and leaks, applied in pipeline systems, mechanical equipment, gas/liquid distribution and storage, etc., can solve the problems of high risk of blockage or even damage to pipelines, high detection costs, and bulky volume, etc., to achieve rapid launch and detection High sensitivity and accurate positioning effect

Inactive Publication Date: 2013-02-13
TIANJIN UNIV
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  • Abstract
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Problems solved by technology

This method is accurate and has high precision. The disadvantage is that when detecting pipes with different diameters, it is necessary to replace the...

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  • Method for detecting tiny leakage of oil transmission pipeline
  • Method for detecting tiny leakage of oil transmission pipeline
  • Method for detecting tiny leakage of oil transmission pipeline

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Embodiment Construction

[0027] The method for detecting oil pipeline micro-leakage of the present invention will be further described below in conjunction with a field test and accompanying drawings.

[0028]The present invention uses a spherical inner detector for detecting oil pipeline leakage as a detection device. The spherical inner detector includes a spherical pressure-bearing aluminum shell and an electronic device inside the aluminum shell. The outer diameter of the aluminum spherical shell is Φ100mm, and the wall thickness is 8mm. Pressure ≥ 5MPa; outside the spherical pressure-bearing aluminum shell is a polyurethane foam layer, the thickness of the foam layer is 30mm, and 8 tapered holes are opened on it; the interface circuit board, core circuit board and The power supply circuit board is provided with a Mini USB interface, a mechanical switch for controlling power-on and power-off, and a multi-color status indicator light on the interface circuit board; an ARM processor S3C2440 is provid...

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Abstract

The invention discloses a method for detecting the tiny leakage of an oil transmission pipeline. The method comprises the following steps of: arranging a strong magnet at a mileage peg along a pipeline; transmitting a spherical inner detector into the pipeline at the head end of a pipe section to be detected, and getting the spherical inner detector back at the tail end of the pipe section to be detected; transmitting sound, accelerated speed, magnetism and time data which are recorded by a memory in the spherical inner detector to a computer; processing a magnetic signal, a sound signal and an accelerated speed signal respectively to obtain a relational graph of amplitude values and time of the signals; extracting a sound abnormal signal to determine the time when leakage points occur; and determining distance between the leakage points and a certain mileage peg according to the perimeter of the spherical inner detector and periodicity of the accelerated speed signal between the time of the leakage points and the time of a certain magnetic spike signal. The method has the advantages of high detection sensitivity, difficulty in blockage, convenience in use and accurate positioning.

Description

technical field [0001] The invention relates to a method for detecting micro-leakage of an oil pipeline. It belongs to the technical field of detecting pipeline leakage. Background technique [0002] With the rapid development of the pipeline transportation industry, the increase of pipelines, the increase of pipe age, the manufacturing defects, construction defects and corrosion of the pipeline itself, and man-made damage, etc., pipeline accidents occur frequently, causing damage to people's lives, property and living environment. Therefore, the timely detection and location of pipeline leakage has important practical significance. [0003] At present, there are mainly two types of various pipeline leakage detection and location methods at home and abroad: one is the external detection method that detects changes in physical parameters such as flow, pressure, and sound caused by leakage. Most of them are negative pressure wave leak detection method. When the pipeline rup...

Claims

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Application Information

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IPC IPC(8): F17D5/06
Inventor 陈世利郭世旭靳世久李一博李健
Owner TIANJIN UNIV
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