| 摘要 |
PROBLEM TO BE SOLVED: To make easier the periodic wall thickness-inspection on piping, etc., for transporting pulverized coal and, at the same time, to safely execute the work. SOLUTION: A work truck 6 provided with magnet wheels 11-(18) which are magnetically attracted to the internal surface of the piping is constituted in such a way that the truck 6 can self-travel with a driving motor 19 and a video camera 31 is mounted on the truck 6. In addition, arms 64 and 65 are attached to the truck 6 in such a way that the arms 64 and 65 can turn in a plane perpendicular to the traveling direction of the truck 6 and can move forward and backward and a thickness measuring sensor 72 is attached to the arms 64 and 65. The sensor 72 is brought into contact with the internal surface of the piping by moving the arms 64 and 65 forward and backward and, at the same time, the sensor 72 is moved along the internal surface of the piping by turning the arms 64 and 65 and running the truck 6. |
