| 摘要 |
PURPOSE:To make it possible to execute automatically scanning and flaw detection for a welded part of a curved pipe part and a straight pipe part and to execute the scanning and the flaw detection without deviating from a course in the direction of the circumference of the pipe even when a track is not provided on the outer periphery of the pipe, in a scanning apparatus for ultrasonic flaw detection. CONSTITUTION:A scanning apparatus 100 is constructed of an ultrasonic probe 30, a support part 20, a scanning drive part 10 and arms 40. Each of vacuum boxes 11 of the scanning drive part 10 surrounds a drive wheel 12 and supports a shaft 12a thereof, the inside thereof is made vacuum by a vacuum pump, the drive wheel 12 is made to cling onto the surface of a pipe 90 by a sucking force thereof and, in this state, the scanning drive part 10 runs in the direction of the circumference of the pipe 90. The support part 20 has also a similar construction. The arms 40 holding the ultrasonic probe 30 in the fore ends are made to extend and contract by two sets of master-slave cylinders each constructed of a drive-side cylinder 51 and a following-side cylinder 52. |
