| 摘要 |
PURPOSE:To repair a pipeline to enable a cable to be led-in, by a method wherein a cylindrical apparatus consisting of a propeller head, a cylinder, a rubber collar and a pressure-proof hose is led into the pipeline prior to the insertion of the cable. CONSTITUTION:A traction wire 2 is inserted into an underground pipeline A through one side manhole to the other side manhole, and when the wire 2 is tracked, then a cylindrical apparatus consisting of a propeller head 1, a cylinder 4, rubber collar 10 and a pressure-proof hose 8 is led into the pipeline A. And when the propeller head 1 hits a bulging section X in the pipeline a, then compressed air is fed into the cylinder 4 via the pressure-proof hose 8 and the bulging section X is stuck by the propeller head 1 and is expanded outside. And prior to the insertion of a cable, the cylindrical apparatus is inserted into the pipeline and the bulgind section X in the pipeline is forcibly corrected and the pipeline is repaired to enable the cable to be led-in. |
