| 摘要 |
PURPOSE:To obtain a heater tube for momentarily and uniformly heating a thermosetting resin infiltrated in a tube lining material with small energy to cure it by attaching two or more conductors having higher conductivity than that of a flexible tubular member having conductivity in the longitudinal direction of the tubular member. CONSTITUTION:A heater tube 1 is composed by attaching two copper wires 3, 3 having higher conductivity than that of a flexibly tubular member 2 having conductivity longitudinally of the tubular member 2. When the inversion and insertion of the heater tube 1 and a tube lining material 10 are finished over the whole length of a branch tube 6 branched from a main tube 5 in the repairing of the branch tube 6, a power source 18 is tuned ON while the inner pressure of a space S is maintained at a predetermined value, and the copper wires 3, 3 of the heater tube 1 are conducted. Then, a current flows from one copper wire 3 in the circumferential direction of the tubular member 2 to the other copper wire 3 in a state that the heater tube 1 and the tube lining material 10 are pressed to the inner peripheral wall of the branch tube 6, the tubular member 2 as an electric resistor is uniformly heated over the whole periphery and length, thermosetting resin impregnated in the tube lining material 10 is directly heated by the heat to be momentarily and uniformly cured. |
