Magnetic leakage, electromagnetic ultrasonic and vertex compound pipeline external detection probe

An electromagnetic ultrasonic and eddy current testing technology, which is applied in the direction of electromagnetic measuring devices, using electromagnetic means, electric/magnetic thickness measurement, etc., to achieve the effect of convenient operation, simple probe structure and reduced volume

Pending Publication Date: 2018-06-29
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention aims to solve the problem that the existing single non-destructive testing method for pipelines is difficult to identify different types of defects, and now provides a composite pipeline external detection probe of magnetic flux leakage, electromagnetic ultrasonic and eddy current

Method used

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  • Magnetic leakage, electromagnetic ultrasonic and vertex compound pipeline external detection probe
  • Magnetic leakage, electromagnetic ultrasonic and vertex compound pipeline external detection probe
  • Magnetic leakage, electromagnetic ultrasonic and vertex compound pipeline external detection probe

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specific Embodiment approach 1

[0033] Specific implementation mode one: refer to figure 1 Specifically explain this embodiment, a magnetic flux leakage, electromagnetic ultrasonic and eddy current composite pipeline external detection probe described in this embodiment, which includes a magnetic flux leakage detection module, an electromagnetic ultrasonic detection module and an eddy current detection module;

[0034] The magnetic flux leakage detection module includes: a U-shaped magnetic circuit and a plurality of magnetic sensitive elements 6, the U-shaped magnetic circuit is used to excite an axial static magnetic field in the pipeline 4 to be tested, and the plurality of magnetic sensitive elements 6 are arranged in a multi-channel staggered array Fixed on the surface of the tested pipeline 4 and located at the center of the U-shaped magnetic circuit, a plurality of magnetic sensitive elements 6 are used to detect the volume defect and the circumferential direction of the tested pipeline 4 within the ci...

specific Embodiment approach 2

[0039] Specific embodiment 2: This embodiment is a further description of a kind of magnetic flux leakage, electromagnetic ultrasonic and eddy current composite pipeline external detection probe described in specific embodiment 1. In this embodiment, the U-shaped magnetic circuit includes: armature 1, Two magnets 2 and two pole pieces 3; the ends of the pole pieces 3 are set to a curved surface structure that fits the surface of the measured pipeline 4;

[0040] The armature 1 is overlapped at one end of the two magnets 2 at the same time, and the two pole pieces 3 are respectively located at the other ends of the two magnets 2. The armature 1 and the two pole pieces 3 rely on the suction force of the two magnets 2 to attract the two magnets 2 respectively. , and the magnetic poles of the two magnets 2 are opposite, so that the armature 1, the two magnets 2 and the two pole pieces 3 are combined to form a U-shaped magnetic circuit.

[0041] In practical application, two pole p...

specific Embodiment approach 3

[0042] Specific embodiment three: This embodiment is to further explain a kind of magnetic flux leakage, electromagnetic ultrasonic and eddy current composite pipeline external detection probe described in specific embodiment two. In this embodiment, the materials of the armature 1 and the pole piece 3 are Ferromagnetic material, the magnet 2 is a permanent magnet or an electromagnet.

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Abstract

The invention provides a magnetic leakage, electromagnetic ultrasonic and vertex compound pipeline external detection probe, and relates to the field of metallic pipeline nondestructive detection. Thedetection probe aims at solving the problem that different kinds of defects are difficult to recognize by using the existing single pipeline nondestructive detection method. A U-shaped magnetic circuit is used for exciting an axial magnetostatic field in a pipeline to be detected; a plurality of magnet-sensitive elements are fixed at the surface of the pipeline to be detected and are positioned in the center position of the U-shaped magnetic circuit; the plurality of magnet-sensitive elements are used for detecting the volume defect and the circumferential area type defects of the pipeline tobe detected in the covering range of the U-shaped magnetic circuit in the circumferential direction of the pipeline to be detected; a body wave thickness measuring part is used for measuring pipe wall thickness; a guided wave defect detecting part is used for detecting the pipeline axial defects outside the covering range of the U-shaped magnetic circuit in the circumferential direction of the pipeline to be detected; an eddy current detection module is used for detecting the defects at the surface and the near surface of the pipeline to be defected, and positioning the defects. The externaldetection probe is applicable to the external detection of small-pipe-diameter magnetic conduction metal pipelines.

Description

technical field [0001] The invention belongs to the field of metal pipeline non-destructive testing. Background technique [0002] In industrial production and life, the use of pipelines is ubiquitous. However, as the age of the pipe increases, defects such as cracks, pits, and wall thickness reduction on the surface and interior of the pipe wall often lead to leakage and explosion accidents, resulting in huge economic losses and serious environmental pollution. In order to ensure the safe use of pipelines, at this stage, non-destructive testing techniques are generally used to conduct regular inspections on pipelines. [0003] At present, the non-destructive testing methods of pipelines widely used in industrial production include radiographic testing, piezoelectric ultrasonic testing, electromagnetic ultrasonic testing, magnetic flux leakage testing, and eddy current testing. Among them, the piezoelectric detection method needs a couplant during detection, and has high r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/72G01N27/82G01N27/83G01N27/90G01B7/06
CPCG01B7/10G01N27/725G01N27/82G01N27/83G01N27/90
Inventor 王淑娟赵普李永虔李策屈正扬夏胜王楷朝翟国富
Owner HARBIN INST OF TECH
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