Branch arm piping reform construction method

摘要

PURPOSE: To simultaneously and efficiently coat the internal surfaces of a plurality of branch pipes connected to a drainage main pipe with a thermosetting type tube. ;CONSTITUTION: A plurality of pieces of air supply hoses 5 are connected to a heating surge tank 4 provided in the air blasting port of a blower 3. Moreover the tips of the respective hoses 5 are connected to the sealing ends of thermosetting type tubes 8 respectively housed in a plurality of tube reversing devices 6. The respective tubes 8 are reversed and inserted into a plurality of branch pipes 2 connected to a drainage main pipe 1 from the tube reversing devices 6 by air pressure. Simultaneously the respective hoses 5 are pulled into the respective tubes 8. The air supplied from the blower 3 is heated by the heating surge tank 4. Hot air is blown from the blowout ports 5a of the tips of the respective hoses 5 into the respective tubes 8. The respective tubes 8 are simultaneously hardened by heat thereof.;COPYRIGHT: (C)1994,JPO&Japio