| 摘要 |
Method and device for renovating a duct system, such as a sewer system, comprising a main pipe (11) and a branch pipe (12) by inserting a replacement pipe (13) into the main pipe, them cutting a hole in the replacement pipe opposite the branch pipe and introducing from the interior of the replacement pipe a liner sleeve (23) to bridge the gap between the replacement pipe and the branch pipe. The liner sleeve (23) is formed of fibrous material impregnated with a curable synthetic resin. One end of it is secured around the mouth (16) of a cup-shaped applicator vessel (15) and the main portion is tucked into the vessel, whereupon the vessel is positioned opposite the hole (14) in the replacement pipe (13). Fluid pressure is applied to the liner sleeve (23) by means of an inflatable bag (20) in the vessel (15) to evert the liner sleeve from the vessel into the branch pipe (12) and press it against the wall of the hole (14) in the replacement pipe (13) and the inside of the branch pipe (12). After the synthetic resin has cured, the pressure is relieved and the applicator vessel (15) is removed. |
