Flaw detecting device for detecting bottom cracks or defects of steel rail

Abstract

The invention discloses a flaw detecting device for detecting bottom cracks or defects of a steel rail. The flaw detecting device for detecting the bottom cracks or defects of the steel rail comprises a first support column (11), a second support column (12), a third support column (13), a fourth support column (14), a first transmission mechanism (31), a second transmission mechanism (32), a first bottom plate (41) and a second bottom plate (42). Both the first bottom plate (41) and the second bottom plate (42) are in an L shape; the first support column (11) and the second support column (12) are arranged on both sides of the first transmission mechanism (31), and the bottom ends of the first support column (11) and the second support column (12) are fixedly connected with the upper end surface of the first bottom plate (41); the third support column (13) and the fourth support column (14) are arranged on both sides of the second transmission mechanism (32), and the bottom ends of the third support column (13) and the fourth support column (14) are fixedly connected with the upper end surface of the second bottom plate (42); the upper end surface of the first bottom plate (41) is provided with a plurality of pits (411), and the center of every pit (411) is provided with a stand column (412). The flaw detecting device for detecting the bottom cracks or defects of the steel rail can detect internal flaws in the middle of the bottom of the steel rail and achieve high sensitivity.

Description

technical field [0001] The invention relates to the technical field of rail flaw detection, in particular to a flaw detection device for detecting cracks or defects at the bottom of rails. Background technique [0002] Rail is an important infrastructure of rail transit and the most important factor to ensure driving safety. Rail flaw detection is an important means to ensure that the rail is in a safe state. In the practice of flaw detection, it is difficult to find the defects on the two extended sides of the bottom of the rail, and such defects can easily develop into broken rails. Especially in winter in the north, the steel rail will generate huge tensile stress, which will accelerate the development of this defect. [0003] In the prior art, ultrasonic detection technology is commonly used for rail flaw detection. Ultrasonic detection technology can detect larger depths, but it can only detect cracks in the projected area from the top of the rail to the bottom of th...

AI Technical Summary

Problems solved by technology

However, the existing ultrasonic flaw detection technology is inefficient and cannot meet the flaw detection needs of steel rails

In addition, other rail flaw detection methods in the prior art have certain defects, such as ray method has radiation, magnetic flux leakage method and infiltration method both have high environmental requirements, pattern recognition method cannot detect internal damage, acoustic, magnetostriction and longitudinal ultrasonic conduction The wave method is not sensitive to shallow surface fish scales, so these methods have relatively large defects

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