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Steel rail magnetic flux leakage detection device based on zero lift-off rolling magnetization

A technology for magnetic flux leakage detection and rails, which is applied in the directions of transportation and packaging, material magnetic variables, railway vehicle shape measuring instruments, etc. It can solve the problem of low magnetization efficiency, poor stability of magnetization state, and difficulty in achieving full coverage of the rail head surface and the side of the rail head Detection and other issues, to achieve the effect of improving magnetization efficiency, low manufacturing cost, and stable magnetization

Pending Publication Date: 2020-10-13
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In view of the current situation and shortcomings of the existing rail non-destructive testing technology, the purpose of the present invention is to provide a rail magnetic flux leakage detection device based on zero lift-off rolling magnetization to solve the problem of low magnetization efficiency in the existing rail magnetic flux leakage non-destructive testing technology , the stability of the magnetization state is poor, and it is difficult to realize the full coverage detection of the surface of the rail head and the side of the rail head.

Method used

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  • Steel rail magnetic flux leakage detection device based on zero lift-off rolling magnetization
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  • Steel rail magnetic flux leakage detection device based on zero lift-off rolling magnetization

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Embodiment Construction

[0031] The specific embodiments of the present invention are given below in conjunction with the accompanying drawings, and a rail non-destructive testing zero lift-off magnetic leakage detection device of the present invention will be further described through the specific embodiments. It should be pointed out that the specific implementation of the present invention is not limited to the forms described in the examples.

[0032] The directional terms mentioned in the detailed description below, such as: up, down, left, right, front, back, etc., are only directions referring to the drawings. Therefore, the directional terms used are only for the convenience of explaining the present invention, and are not intended to limit the present invention.

[0033] A rail magnetic flux leakage detection device based on zero lift-off rolling magnetization in this embodiment has a structure such as figure 1 and figure 2As shown, the composition includes a magnetizing coil 4 for generat...

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Abstract

The invention discloses a steel rail magnetic flux leakage detection device based on zero lift-off rolling magnetization. The device comprises a magnetizing coil used for generating an excitation magnetic field, a U-shaped magnet yoke used for forming a magnetizing loop, a profiling rolling magnetizing wheel in direct contact with a steel rail, a magnetic flux leakage detection sensor array used for being installed on a probe mechanism, and a grating encoder used for defect position positioning. The U-shaped magnet yoke, the detected steel rail and the profiling rolling magnetizing wheel forma magnetizing loop. As the profiling rolling magnetization wheel is in direct contact with the steel rail, the magnetic resistance of a magnetization loop can be reduced, the magnetization intensity of the detected steel rail is enhanced and the magnetization depth is increased. Full-coverage magnetization of the upper surface and the side face of the rail head of the steel rail is achieved, magnetic flux leakage detection of the surface and the near surface of the rail head can be finally achieved, and the characteristics of high magnetization capacity and high detection reliability are achieved.

Description

technical field [0001] The invention relates to the technical field of rail non-destructive testing, in particular to a rail non-destructive flaw detection zero lift-off rolling magnetization magnetic flux leakage detection device based on the magnetic flux leakage detection technology. Background technique [0002] Railway transportation plays an important supporting role in my country's economic and social development and modernization construction. It is the main artery of the national economy, key infrastructure and major livelihood projects. In the process of rapid development and large-scale successful application of high-speed railways, operational safety is the basic condition for high-speed railway operations, and a little carelessness will often cause catastrophic safety accidents. Among them, improving the safety and reliability of rail infrastructure is of great importance It is of great significance to ensure the safe and smooth operation of railways. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/83B61K9/08
CPCG01N27/83B61K9/08
Inventor 李二龙吴亭君伍剑波吴文强张目超黄晓明
Owner SICHUAN UNIV
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