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Method for detecting pipeline defects by combining magnetic flux leakage and electromagnetic ultrasonic waves

A technology for detecting pipelines and magnetic flux leakage, which is applied to radio wave measurement systems, measuring devices, and magnetic variables of materials. operational effect

Pending Publication Date: 2021-06-01
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are also difficulties in conducting accurate qualitative and quantitative research on defects in pipelines, and it is difficult to perform electromagnetic ultrasonic testing on specimens with complex shapes or irregular shapes.

Method used

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  • Method for detecting pipeline defects by combining magnetic flux leakage and electromagnetic ultrasonic waves
  • Method for detecting pipeline defects by combining magnetic flux leakage and electromagnetic ultrasonic waves
  • Method for detecting pipeline defects by combining magnetic flux leakage and electromagnetic ultrasonic waves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Embodiment 1: as figure 1 As shown, a device for combined magnetic flux leakage and electromagnetic ultrasonic detection of pipeline defects includes a GPS / INS integrated navigation system 28, a supporting wheeled pipeline robot, a three-axis magnetic flux leakage detection device, an electromagnetic ultrasonic detection device and a computer 29;

[0062] Satellite positioning and inertial navigation (GPS / INS) integrated navigation system 28 is used to accurately locate the specific position of the device in the pipeline, and at the same time obtain the specific position information of the detected defect;

[0063] Supporting the wheeled pipeline robot, which is used to make the three-axis magnetic flux leakage detection device and the electromagnetic ultrasonic detection device advance stably in the pipeline under test 1;

[0064] The three-axis magnetic flux leakage detection device is used to magnetize the tube wall to a near-saturation state by observing the deforma...

Embodiment 2

[0070] Embodiment 2: The structure of the device for detecting pipeline defects combined with magnetic flux leakage and electromagnetic ultrasonic in this embodiment is basically the same as that of the device for detecting pipeline defects in combination with magnetic flux leakage and electromagnetic ultrasonic in Embodiment 1, except that: Figure 3-6 As shown, the supporting wheeled pipeline robot is provided with a positioning antenna 21, and the positioning antenna 21 is wirelessly connected with a computer 29;

[0071] The three-axis magnetic flux leakage detection device includes an installation housing 13, and the installation housing 13 is provided with a brush set I12, a brush set II, and a magnetic flux leakage detection probe 16, and the brush set I12 and the brush set II are respectively located on the magnetic flux leakage detection Both sides of the probe 16, the brush set I12 and the brush set II are all attached to the inner wall of the pipeline 1, and the inst...

Embodiment 3

[0080] Embodiment 3: as figure 2 As shown, the identification and detection method of the device based on combined magnetic flux leakage and electromagnetic ultrasonic detection of pipeline defects includes the following specific steps:

[0081](1) Set the three-axis magnetic flux leakage detection device and the electromagnetic ultrasonic detection device at both ends of the supporting wheeled pipeline robot, and the GPS / INS integrated navigation system is set on the supporting wheeled pipeline robot; according to the diameter of the pipeline to be tested, adjust Support the wheeled pipeline robot, the three-axis magnetic flux leakage detection device and the electromagnetic ultrasonic detection device so that the central axis coincides with the central axis of the pipeline, and make the wheeled pipeline robot, the three-axis magnetic flux leakage detection device and the electromagnetic ultrasonic detection device coincide with the pipeline The inner wall fits;

[0082] (2...

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Abstract

The invention relates to a method for detecting pipeline defects by combining magnetic flux leakage and electromagnetic ultrasonic waves, which belongs to the technical field of nondestructive testing. A satellite positioning and inertial navigation (GPS / INS) combined navigation system is adopted for positioning, and the three-axis magnetic flux leakage detection device and the electromagnetic ultrasonic detection device are driven by the supporting wheel type pipeline robot, so that the detector is ensured to have a stable operation speed; magnetic flux leakage detection is carried out on the interior of a pipeline through a three-axis magnetic flux leakage detection device in the pipeline, a magnetic flux leakage signal in the pipeline is acquired, and data processing is conducted on the acquired magnetic flux leakage signal to judge the position and size of a defect of the detected pipeline; meanwhile, electromagnetic ultrasonic detection is carried out, an electromagnetic ultrasonic probe is driven by the pipeline robot to move forwards at a slow speed, and pipeline defect signals are collected and sorted. Two detection methods are combined by utilizing different characteristics of three-axis magnetic flux leakage detection and electromagnetic ultrasonic detection, so that comprehensive detection of pipeline defects is realized.

Description

technical field [0001] The invention relates to a method for detecting pipeline defects by combining magnetic flux leakage and electromagnetic ultrasonic waves, and belongs to the technical field of nondestructive testing. Background technique [0002] Resource transportation pipelines are widely used due to their advantages of low operating energy consumption, large transportation carrying capacity and long-term stable operation, especially for oil and gas pipeline transportation, which makes the safety of oil and gas pipelines particularly important. Existing oil and gas pipeline defect detection technologies include Ultrasonic testing, radiographic testing, magnetic particle testing, penetrant testing and eddy current testing, etc., each testing method has its advantages and disadvantages, and currently a single testing method is usually used for testing. [0003] The currently commonly used pipeline magnetic flux leakage detection method has the advantages of low require...

Claims

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Application Information

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IPC IPC(8): G01N27/83G01N27/90G01S19/49
CPCG01N27/83G01N27/90G01S19/49
Inventor 宋鹏云江梦陈海洋
Owner KUNMING UNIV OF SCI & TECH
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