Double-track type high-speed stable ultrasonic flaw detector

Abstract

The invention discloses a double-track type high-speed stable ultrasonic flaw detector. The flaw detector comprises a double-track vehicle provided with a walking subsystem, a flaw detection subsystem, a centering subsystem and a control display subsystem, and a steering device used for pivot steering is arranged on a chassis of the double-track vehicle; the flaw detection subsystem comprises a plurality of ultrasonic signal processing modules; the plurality of ultrasonic signal processing modules are used for respectively processing data of different probes of a flaw detection wheel; the centering subsystem comprises a horizontal adjusting part and an angle adjusting part; and the horizontal adjusting part and the angle adjusting part are respectively used for detecting and automaticallyresetting the horizontal position and angle of the flaw detection wheel. The detection speed is integrally improved, the problems of missed detection, low detection rate, increased jittering of flaw detection wheels, poor equipment safety, difficult equipment maintenance and the like caused by speed increase are solved, the problems that reversing detection is not safe and not beneficial to observation, the detection speed is low, reversing detection is not suitable for long-distance driving and the like are solved, and the technical characteristics of high detection speed, high detection stability and convenient steering are achieved.

Description

technical field [0001] The invention belongs to the technical field of rail flaw detection, in particular to a dual-track high-speed and stable ultrasonic flaw detector. Background technique [0002] As the main artery of the national economy, the railway is one of the most important infrastructures of the country, and it is also the most popular mode of transportation related to each of our citizens. In our country, as the train speed increases and the axle load increases, the train will cause friction, extrusion, bending and impact on the rail during the acceleration and braking process and when the train passes through the rail joints, bends and switches. Under the action of the rail, the rail is very easy to be damaged. In addition, the environmental factors cause the thermal expansion and contraction of the metal, and the damage speed of the rail is correspondingly accelerated, so that the detection cycle also tends to be shortened. The rail flaw detection is an importa...

AI Technical Summary

Problems solved by technology

[0006] 1) In the actual flaw detection operation, the requirements for long intervals and short skylights cannot be met, and the detection efficiency is not high. If the above-mentioned flaw detection system is used for flaw detection of double-track steel rails, each side of the steel rails will be ultrasonically tested by one flaw detection wheel (9 probes) , at present, the maximum effective detection speed on rails is only 15km / h. In this way, the long section is generally 40 kilometers, and the short skylight is generally only 2 hours, so the detection speed of 15km / h cannot complete the task of this working condition;

[0007] 2) The detection speed is increased. The actual flaw detection stability is not good. On the basis of the existing technology, if the detection speed of the flaw detection vehicle is further increased, the serpentine movement will be intensified during the high-speed flaw detection process of the double-track flaw detection vehicle, which will affect the normal operation of the flaw detection wheel. Work, the calibration before operation can use manual adjustment to make the flaw detection wheel in the best position, and the calibration before operation can use manual adjustment to make the flaw detection wheel in the best position, but manual adjustment cannot meet the flaw detection operation during high-speed flaw detection operations need;

[0008] 3) The detection speed is increased. The flaw detection vehicle may still exist in the actual operation process: poor braking performance, unable to stop in time, and there are certain safety hazards; the load of the flaw detection system is large, and the temperature stability is poor, which affects the detection stability; Splashes such as gravel and other debris will cause a greater possibility of failure of the flaw detector and increase maintenance costs; it is not safe to detect when reversing in two-way driving, and it is not conducive to the driver and check-in staff to observe the detection situation, and the detection speed is not correct. The direction detection is fast, and the reverse detection is not suitable for long-distance driving

Images