ULTRASOUND FLAW DETECTION DEVICE FOR PIPE ENDS

摘要

The object of the present invention is to provide an ultrasonic testing apparatus for a pipe end portion, which enables accurate ultrasonic testing by the stable interposition of a coupling medium between the pipe end portion and an ultrasonic probe. The ultrasonic testing apparatus 100 comprises: an ultrasonic probe 1 which is disposed under the end portion of a pipe P laid in the horizontal direction to face the pipe end portion, the ultrasonic probe 1 transmitting ultrasonic waves to the end portion of the pipe and receiving the ultrasonic waves therefrom; and a probe holder 2 housing the ultrasonic probe which is disposed under the end portion of the pipe to face the pipe end portion and follows the pipe rotating in the circumferential direction. The probe holder comprises a coupling medium reservoir part which surrounds a space between the ultrasonic probe and the end portion of the pipe to contain a coupling medium W therein. The coupling medium reservoir part comprises: a coupling medium reservoir part body 21 into which the coupling medium is supplied; an annular bellows part 22 which is attached to the upper side of the coupling medium reservoir part body so as to internally communicate with the coupling medium reservoir part body, and can expand and contract vertically; and an annular spacer 23 which is attached to the upper side of the bellows part, and at least the upper surface of the annular spacer is a flat horizontal surface.