METHOD FOR HEATING CYLINDRICAL STRUCTURE

摘要

PURPOSE:To heat uniformly a cylindrical structure by fitting an exhaust regulating valve to one closed end of the structure and putting a hot air distributing pipe having plural holes in the side in the structure from the other open end. CONSTITUTION:A hot air distributing pipe 2 having plural holes 6 in the side is put in a cylindrical structure 1 having one closed end 9 from the other open end, and the pipe 2 is supported by jigs 7. An exhaust regulating valve 8 is fitted to the closed end 9. Hot air is fed into the structure 1 from the pipe 2 through the holes 6 while regulating the internal pressure of the structure 1 with the valve 8 to heat uniformly the structure 1.