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Steel rail joint clamping plate fatigue crack damage and expanding online monitoring assembly and working method thereof

A technology for crack growth and fatigue cracks, which is applied in the field of on-line monitoring components for fatigue crack damage and expansion of rail joint splints, to achieve the effect of early warning of track safety status

Inactive Publication Date: 2016-11-16
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, due to the increase in the number of high axle load cycles in heavy-duty lines, the fatigue resistance of rail joint splints is facing greater challenges

Method used

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  • Steel rail joint clamping plate fatigue crack damage and expanding online monitoring assembly and working method thereof
  • Steel rail joint clamping plate fatigue crack damage and expanding online monitoring assembly and working method thereof
  • Steel rail joint clamping plate fatigue crack damage and expanding online monitoring assembly and working method thereof

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Embodiment Construction

[0019] Please refer to figure 1 and figure 2 As shown, the rail joint splint fatigue crack damage and expansion online monitoring assembly of the present invention includes a rail 1-1, a rail splint 1-2 installed on the left and right sides of the rail 1-1, and a rail splint 1-2 pasted on the top and bottom of the rail splint 1-2 respectively. And the first crack extension strain gauge 2-1 and the second crack extension strain gauge 2-2 equal in length to the rail splint 1-2, the first crack extension strain gauge 2-2 is pasted on the top and bottom of the rail splint 1-2 1 and the second crack growth strain gauge 2-2 are pasted on the insulating protective layer 3 to form a protective layer for the first crack growth strain gauge 2-1 and the second crack growth strain gauge 2-2.

[0020] The base films of the first crack growth strain gauge 2-1 and the second crack growth strain gauge 2-2 are made of organic binder, and the sensitive grid is composed of parallel grid strips...

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Abstract

The invention discloses an on-line monitoring component for fatigue crack damage and expansion of a rail joint splint and a working method thereof. The first crack extension strain gauge, the second crack extension strain gauge, and the miniature signal acquisition unit, the present invention can take electricity from the rail, and transmit the signal through the original signal line of the track, and monitor the top and bottom of the rail splint in real time when the train passes According to the change of the resistance value of the first crack growth strain gauge and the second crack growth strain gauge, according to the change curve of the sensitive grid fracture sequence and the resistance of the strain gauge in advance, the crack growth and growth rate at the corresponding position can be inferred, and then judged The health status of rail cleats. The invention makes full use of the characteristics of the rail itself, is energy-saving and efficient, can accurately evaluate the health state of the rail splint, and effectively warns the safety state of the rail.

Description

Technical field: [0001] The invention relates to the technical field of rail detection, in particular to a detection method for a rail splint, and more specifically to an on-line monitoring component for fatigue crack damage and expansion of a rail joint splint used for rail connection and a working method thereof. Background technique: [0002] Railways are known internationally as "green vehicles" and play a vital role in the comprehensive transportation system of society, which is related to the national economy and people's livelihood. The track is the foundation of the train, and due to the high-speed operation of the train, the track failure will cause huge economic losses and casualties. [0003] Steel rail directly bears the load of locomotives and vehicles, and is the most important part of the track. Its strength and state are directly related to the safety, stability and smoothness of rail transportation. Due to the limitation of production and transportation con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/04
CPCG01N27/041
Inventor 熊克刘红光宋丹马学仕卞侃王曼
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS