| 摘要 |
PURPOSE:To accurately arrange a probe on a tubular object to be inspected, by performing the positioning of a pair of probes on the basis of the holder body located on the tubular object to be inspected. CONSTITUTION:The intervals between transmitting and receiving probes 300, 300' and the angle of inclination of a probing surface to a pipe peripheral surface 201 are calculated on the basis of the outer diameter and wall thickness of a pipe 200 to be subjected to flaw detection. Next, the adjust screws 55, 55' of positioning devices 500, 500' are moved to accurately set the distance between the probes 300, 300'. Then, an indicator 61 and an angle scale are put into practical use to accurately set the arrangement angles of the probes 300, 300'. The holder 1 is set on the peripheral surface 201 of the pipe 200 and the probes 300, 300' are arranged on the same circumference of the pipe 200. Further, the roller of a main body 10 is contacted with the peripheral surface 201 by the energizing force of a spring to perform the positioning of the holder 10 to the pipe 200 and a seal material 100 is pressed to the peripheral surface 201 and, when water flows in from a contact medium supply port 16, said water is stagnated in the pipe 200. Herein, the holder 1 is moved to the peripheral direction of the pipe 200 to perform flaw detection.
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