Ultrasonic detection block device for steel rail welded with cable on rail waist and detection method

A welding cable and ultrasonic technology, applied in the direction of measuring devices, using sound waves/ultrasonic waves/infrasonic waves to analyze solids, using sound waves/ultrasonic waves/infrasonic waves for material analysis, etc., can solve problems such as accurate positioning and quantification of defects, and achieve simple operation and detection The results are accurate

Pending Publication Date: 2018-12-18
中铁检验认证中心有限公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a rail ultrasonic detection test block device and detection method for rail waist welding cables to solve the technical problem of accurate positioning and quantification of defects in the rail welding area of ​​rail waist welding cables

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  • Ultrasonic detection block device for steel rail welded with cable on rail waist and detection method
  • Ultrasonic detection block device for steel rail welded with cable on rail waist and detection method
  • Ultrasonic detection block device for steel rail welded with cable on rail waist and detection method

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Embodiment Construction

[0029] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0030] Such as figure 1 and figure 2 As shown, it is a schematic diagram of the structure of the rail to be tested by the ultrasonic detection of the rail waist welding cable. 1 is the rail, 2 is the copper solder joint, and 3 is the cable welded to the rail waist of the rail 1 through the copper solder joint 2, which can be a current equalizer. Cable, return cable, freewheeling cable or signal cable, 4 is a probe for ultrasonic testing.

[0031] A rail ultrasonic testing test block device for rail waist welding cables,...

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Abstract

The invention discloses an ultrasonic detection block device for a steel rail welded with a cable on the rail waist and a detection method. The cable is welded to one end of the rail waist of the steel rail of a first block of the block device through a copper welding point, and a first flat-bottomed hole, a second flat-bottomed hole and a third flat-bottomed hole are formed in the cross section of the other end of the rail waist of the steel rail; and a first transverse through hole, a second transverse through hole and a third transverse through hole are formed in one end of the rail waist of the steel rail of a second block, and a fourth flat-bottomed hole, a fifth flat-bottomed hole and a sixth flat-bottomed hole are formed in the other end of the rail waist of the steel rail. By comparing with the defect-free first block welded with the cable, the condition that contourlets of the welding point are falsely judged as defect waves in detection can be avoided; by manufacturing a limited number of standard defects at specific positions of the block and comparing standard defect echo heights with actual defect echo heights, the defect equivalent sizes are determined; the defect positions are determined according to the defect echo positions, and cracks and spot defects in different directions are detected by means of different scanning modes; and operation is easy, and detection results are accurate.

Description

technical field [0001] The invention relates to the technical field of ultrasonic detection. More specifically, it relates to a rail ultrasonic testing test block device and a testing method for rail waist welding cables. Background technique [0002] Current sharing cables, return cables, freewheeling cables and signal cables in urban rail transit are mostly connected to rails by exothermic welding. Exothermic welding has a high instantaneous temperature during the welding process. If it is not operated properly, it will cause defects inside the rail and bring safety hazards to the operation of urban rail transit. Ultrasonic testing can effectively detect internal defects of rails, but due to the lack of suitable testing methods, missed and false detections occur from time to time. In the process of project acceptance and later track maintenance, it has brought many troubles to the construction unit and operation unit. [0003] At present, YB / T951-2014 "Rail Ultrasonic F...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/30G01N29/04G01N29/44
CPCG01N29/04G01N29/30G01N29/4436
Inventor 任国强胡智博黎连修郭泽策赵儒雪牛淇
Owner 中铁检验认证中心有限公司
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