Rail bottom side flaw detection undercarriage for welded joint weld joint of welded rail base steel rail

Abstract

The invention discloses a rail bottom side flaw detection undercarriage for a welded joint weld joint of a welded rail base steel rail. The rail bottom flaw detection device comprises a rail bottom flaw detection base located under a steel rail, two transmitting structures A arranged on the rail bottom flaw detection base and two receiving structures A arranged on the rail bottom flaw detection base, and the transmitting structures A and the receiving structures A are in one-to-one correspondence and are arranged at the two sides of the steel rail respectively; the transmitting structure A comprises a transmitting probe A of which the transmitted ultrasonic wave A is inclined to the length direction of the steel rail, the receiving structure A comprises a plurality of receiving probes A for receiving the ultrasonic wave A, and the direction of receiving the ultrasonic wave A by the receiving probes A is vertical to the transmitting direction of the ultrasonic wave A; and the directionsof the ultrasonic waves emitted by the two emission probes A are not parallel. The steel rail flaw detection device has the beneficial effects that flaw detection can be conducted on the rail bottomside of the steel rail, automatic control can be achieved, and the flaw detection efficiency and the flaw detection precision can be improved.

Description

technical field [0001] The invention relates to the field of ultrasonic flaw detection, in particular to a rail bottom side flaw detection landing gear for welded rail base rail welded seams. Background technique [0002] With the overall speed-up, expansion and upgrading of my country's railways, as well as the rapid development of passenger dedicated lines and high-speed and heavy-haul railways, higher requirements are placed on the quality of rail welded joints. The quality control of rail welded joints directly affects railway transportation production and driving safety. Therefore, starting from the improvement of flaw detection standards and the use of new equipment, the full-section flaw detection of single and double probes for rail welds and heat-affected zones is the key to improving the ability of weld flaw detection. , The double insurance strategy to ensure that the welded joints leave the factory without damage is also an effective means to ensure the safety of...

AI Technical Summary

Problems solved by technology

[0004] 1. Bulk or point defects, such as looseness and slag inclusion;

[0005] 2. Planar defects, such as gray spots, unwelded, etc., among which planar defects are very dangerous. It not only reduces the effective cross section of the rail, but also causes stress concentration, and even causes the weld to pull apart or the rail to break

[0007] 1. Manual hand-held probes are used for flaw detection. There are many influencing factors, the scanning range is not comprehensive, manual identification and judgment, flaw detection results are unreliable, and safety technology is not guaranteed;

[0008] 2. For planar defects, double-probe K-type and tandem flaw detection methods must be used. The operation is complicated, and the technical level and skills of flaw detection operators are high, and manual flaw detection is difficult to achieve;

[0009] 3. The flaw detection efficiency is low, and the flaw detection process is a bottleneck restricting the production of the welding rail assembly line;

[0010] 4. The low level of informatization is not conducive to the preservation of flaw detection data, and the welding process cannot be improved through statistical analysis of data

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