Ultrasonic self-focusing phased-array detecting device for butt weld of small diameter tubes

Abstract

The invention relates to an ultrasonic self-focusing phased-array detecting device for a butt weld of small diameter tubes. The ultrasonic self-focusing phased-array detecting device comprises an ultrasonic phased array instrument, a 60-degree transverse wave wedge block, a 7.5-Mhz self-focusing ultrasonic phased-array probe, a chain scanning frame and a miniature encoder. The chain scanning frame can be movably installed on the corresponding small diameter tube relative to the small diameter, and the 60-degree transverse wave wedge block and the 7.5-Mhz self-focusing ultrasonic phased-array probe are connected and fixed to the chain scanning frame; an ultrasonic wave emitted by the 7.5-Mhz self-focusing ultrasonic phased-array probe enters the small diameter tubes to scan through the 60-degree transverse wave wedge block, and the scanned result is fed back to the ultrasonic phased array instrument to be further processed. The miniature encoder is fixed to the chain scanning frame to record the axial movement track of the 7.5-Mhz self-focusing ultrasonic phased-array probe on the corresponding small diameter tube. According to the ultrasonic self-focusing phased-array detecting device, the size and the position of a butt-weld defect of the to-be-detected tubes can be confirmed by rotating the detecting device by a circle, and detecting efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of weld detection, in particular to an ultrasonic self-focusing phased array detection device for butt welds of small-diameter pipes. Background technique [0002] Small-diameter tubes are small tubes with an outer diameter of Φ0.8 inches to Φ4.5 inches, and are widely used in industrial fields such as petrochemical, shipbuilding, power generation, pressure vessels, and nuclear waste treatment. In the related art, it is often necessary to perform non-destructive testing on the butt weld of the small-diameter pipe during the installation process of the small-diameter pipe to ensure the safety of the small-diameter pipe. However, compared with large-diameter pipes, small-diameter pipes have more butt welds, and sometimes the welds appear at corners, the space between pipes is small, and small-diameter pipes cannot move. Contents of the invention [0003] In view of the above problems, the object of the pres...

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Problems solved by technology

[0003] In view of the above problems, the object of the present invention is to provide an ultrasonic self-focusing phased array detection device for small-diameter pipe butt welds, which solves the detection problems caused by the small-diameter pipe butt welds, the small space between the pipes, and the inability to move. inconvenient technical issue

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