Ultrasonic testing apparatus for pipe or tube end portion and method of setting initial position of probe holder

摘要

An ultrasonic testing apparatus includes an ultrasonic probe disposed under an end portion of a pipe laid in the horizontal direction to face the pipe end portion. The probe transmits ultrasonic waves to the end portion of the pipe and receives the ultrasonic waves therefrom. A probe holder housing the probe includes a coupling medium reserver part which surrounds a space between the probe and the end portion of the pipe to contain a coupling medium W. The coupling medium reserver part includes a part body 21 into which the coupling medium is supplied; an annular bellows part, which is attached to the upper side of the part body to internally communicate with the part body, and an annular spacer 23 attached to the upper side of the bellows part, the upper surface of the annular spacer being a flat horizontal surface.

主权项

1. An ultrasonic testing apparatus for a pipe or tube end portion, comprising:
an ultrasonic probe which is disposed under the end portion of a pipe or tube laid in the horizontal direction to face the pipe or tube end portion, the ultrasonic probe transmitting ultrasonic waves to the end portion of the pipe or tube and receiving the ultrasonic waves therefrom; and a probe holder housing the ultrasonic probe which is disposed under the end portion of the pipe or tube to face the pipe or tube end portion and following the pipe or tube rotating in a circumferential direction, the probe holder comprising a coupling medium reserver part which surrounds a space between the ultrasonic probe and the end portion of the pipe or tube to contain a coupling medium therein, and the coupling medium reserver part comprising: a coupling medium reserver part body into which the coupling medium is supplied; an annular bellows part which is attached to an upper side of the coupling medium reserver part body so as to internally communicate with the coupling medium reserver part body, and can expand and contract vertically, the coupling medium supplied to the coupling medium reserver part flowing into the annular bellows part; and an annular spacer which is attached to the upper side of the bellows part, and at least an upper surface of the annular spacer being a flat horizontal surface, the coupling medium flowing from the annular bellows part to the annular spacer, and a film in contact with the pipe or tube end portion being formed by the coupling medium raised beyond the upper surface of the annular spacer, wherein the coupling medium reserver part body comprises a coupling medium supply port for supplying the coupling medium into the coupling medium reserver part body and a coupling medium spraying nozzle configured for spraying the coupling medium toward the ultrasonic transmitting/receiving surface of an ultrasonic probe.