SYSTEM AND METHOD FOR TREATING INNER SURFACE OF CYLINDRICAL STRUCTURE

PROBLEM TO BE SOLVED: To provide a system and a method for treating an inner surface easily and inexpensively which facilitates safe treatment of an inner surface of a slanting cylindrical structure without setting up a large scaffold within the cylindrical structure and allows a worker to perform a sufficient treatment of the inner surface. SOLUTION: The system 10 for treating an inner surface is used for performing a rustproof treatment on the inner surface of a slanting iron water pipe 100. The system comprises an extending rope 11 which is fixed on the upper part of the iron water pipe and extends to the lower part, a chuck 12 which locks the extending rope unslidably and engages with the extending rope slidably by gripping, a work strap 13 connected to the extending rope 11 via the chuck 12 for holding a worker in a working position, a sandblasting device 14 for performing sandblasting on the inner surface of the iron water pipe 100, and an air supply device 15 for supplying fresh air into a draping cover 45 of the worker. COPYRIGHT: (C)2007,JPO&INPIT