Automatic scanning device for transverse crack

Abstract

The invention discloses an automatic scanning device for a transverse crack. The automatic scanning device comprises an automatic crawling unit, a scanning unit and a water supply coupling unit; the scanning unit comprises a supporting frame, at least four roller assemblies and a probe assembly; the supporting frame comprises a first cross bar and a second cross bar which are in parallel mutually;a connecting rod is arranged between the first cross bar and the second cross bar; the roller assemblies are respectively connected with the corresponding end parts of the first cross bar or the second cross bar; the probe assembly comprises connecting seats, probe clamps and probes; the connecting seats are arranged on the connecting rod; the probe clamps are arranged at the bottoms of the connecting seats; the probes are arranged on the probe clamps; a first water outlet hole and a second water outlet hole are also respectively formed on each probe clamp and at both sides of the corresponding probe; the water supply coupling unit comprises a pump, a manifold and a plurality of water pipes; an outlet of the pump is connected with an inlet of the manifold; and each outlet of the manifoldis respectively connected with an inlet of the corresponding first water outlet hole or second water outlet hole through the corresponding water pipe. The automatic scanning device can implement automatic scanning on the transverse crack and is high in detection accuracy.

Description

technical field [0001] The invention belongs to the technical field of automatic scanners, and in particular relates to an automatic scanner for transverse cracks. Background technique [0002] Time Of Flight Diffraction (TOFD) detection technology is one of the latest ultrasonic detection technologies. It is characterized by the use of ultrasonic diffraction, reflection and other signals to achieve the purpose of detection. The quantification of defects not only depends on the amplitude of the signal, The detection sensitivity is relatively high. At the same time, the detection technology combines advanced data processing and image processing technology, capable of real-time imaging, clear and intuitive defect analysis, accurate and reliable detection data that can be recorded, and has some advantages of radiographic flaw detection. [0003] The current TOFD inspection is mostly based on non-parallel scanning along the direction of the weld, see figure 1 , this scanning m...

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Problems solved by technology

[0004] There is also a parallel scanning method in the prior art, see for details figure 2 , this scanning method moves laterally along the weld, and is generally used for local signal analysis when the defect signal is known. It is impossible to form a TOFD image that records the longitudinal position of the weld during the overall inspection of the weld, and it is also unable to implement automatic scanning.

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