CREEP MOVING MECHANISM, CREEP MOVING DEVICE, AND CREEP MOVING METHOD

摘要

PPROBLEM TO BE SOLVED: To smoothen the repair operations for the welds of a narrow part on the back of a shroud support leg and on the side with a pressure vessel of a nuclear reactor, including a check, inspection, preventive maintenance, repair, etc. PSOLUTION: A creep moving mechanism 1 is equipped with suction mechanisms 51a, 51b, 51c, 51d composed of a plurality of stages and to be attached by suction to a wall surface, a creep drive part 2 installed on the suction mechanisms 51a, 51b, 51c, 51d and able to make transverse motion, an elevating/sinking mechanism 11 installed on the suction mechanisms 51a, 51b, 51c, 51d and able to make vertical motions, and a sucked condition moving means (for example, air cylinders 5a, 5b, 5c, 5d) to enable movement of the suction mechanisms in the condition attached by suction to the wall surface by the suction mechanisms 51a, 51b, 51c, 51d. PCOPYRIGHT: (C)2006,JPO&NCIPI