Drum-type probe device for ultrasonic testing

Abstract

A drum-type probe device for ultrasonic testing is characterized by comprising a middle shaft, probes, internal flanges, external flanges and an outer film, wherein the middle shaft is hollow to allow a cable to pass through, two ends are sealed, a through hole is formed in the outer wall on one side, and a mounting base is arranged on the through hole; the probes are arranged on the mounting base in a sealed manner and exposed out of an emission end surface; the two internal flanges are arranged at two ends of the middle shaft respectively; the two external flanges are arranged at two ends of the middle shaft respectively and located outside the internal flanges; and the outer film is made of a flexible and acoustically-transparent material, located outside the middle shaft and wraps the probes, and two ends of the outer film are connected between the outer end surfaces of the internal flanges and the inner end surfaces of the external flanges in a sealing manner. Compared with the prior art, the drum-type probe device for ultrasonic testing has the advantages that due to additional arrangement of the outer film, in a detection process, the outer film is contacted with a steel plate surface while the probes are not contacted with the steel plate surface, so that abrasion of the probes is reduced, and the service life of the probes is guaranteed.

Description

technical field [0001] The invention relates to a steel plate damage detection device, in particular to an ultrasonic detection device. Background technique [0002] At present, in the ultrasonic inspection of steel plates, the operator usually bends down and holds the probe to directly detect the steel plate at first. This method is relatively simple and has many shortcomings. Due to the large area and large number of steel plates, the wear of the probe is too large, and the long-term bending or squatting detection is likely to cause operator fatigue, high labor intensity, and slow detection speed; this type of detection device can refer to the patent number ZL200720199686.7 Chinese utility model patent "An Ultrasonic Flaw Detection Device" (authorized announcement number is CN201141855Y), you can also refer to the Chinese utility model patent "handheld steel plate detection device" with patent number ZL200920254007.0 (authorized announcement number is CN201503418U) and so ...

AI Technical Summary

Problems solved by technology

During the detection process, it is in contact with the surface of the steel plate. In order to ensure that the ultrasonic wave can enter the steel plate smoothly, the probe needs to be pressed against the steel plate to make the fit tight. When the surface of the steel plate is relatively rough, the continuous friction during the detection process will cause severe wear of the probe

As the surface of the probe is severely worn, the contact surface with the steel plate surface will be deformed, resulting in changes in the direction of the internal ultrasonic beam, reducing the detection sensitivity, and even more serious missed or false detections

Shorten the service life of the probe and increase the detection cost

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