Tight follow-up type ultrasonic flaw detection device

Abstract

The invention discloses a tight follow-up type ultrasonic flaw detection device. The tight follow-up type ultrasonic flaw detection device comprises a probe box. At least one ultrasonic probe is arranged at the front end of the probe box; the ultrasonic probe is connected with an ultrasonic flaw detection instrument through a signal wire; a water outlet groove is arranged beside the ultrasonic probe; the water outlet groove is connected with a water supply device through a water passing nozzle; the both sides of the probe box are respectively connected with corresponding universal devices; the universal devices at the both sides are respectively mounted on corresponding supporting arms; the supporting arms at the both sides are connected through a connection board; a thread hole matched with an external adjusting screw is arranged on the connection board; and the probe box and a face to be detected tightly follow up through the movement of the connection board on the external adjusting screw and the adjustment of the directions of the universal devices. The tight follow-up type ultrasonic flaw detection device and a rail web surface to be detected keep a tight follow-up state all along, and are entirely coupled; the detection leak and the error detection can be reduced; and the tight follow-up type ultrasonic flaw detection device can be widely applied to the field of production and detection of a heavy rail.

Description

technical field [0001] The invention relates to a detection device for heavy rail production, in particular to a close-moving ultrasonic flaw detection device. Background technique [0002] At present, in the process of heavy rail production, the on-line detection of internal defects of steel rails mostly adopts contact ultrasonic flaw detection. During flaw detection, the ultrasonic probe is in close contact with the surface of the rail to be inspected, and water is used as a coupling agent in the middle, and the online flaw detection of the entire rail is completed through the flow of the rail on the production line. The use of contact ultrasonic flaw detection has the advantages of short detection distance, low ultrasonic signal attenuation and high signal-to-noise ratio. [0003] However, in the actual detection process, due to mechanical factors and the straightness error of the rail itself, the gap between the waist surface of some rail sections and the ultrasonic pro...

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Problems solved by technology

[0003] However, in the actual detection process, due to mechanical factors and the straightness error of the rail itself, the gap between the waist surface of some rail sections and the ultrasonic probe is too large, and the water cannot be fully coupled, resulting in missed detection and false detection.

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