PARTIAL REPAIRING DEVICE FOR REDUCING A DIAMETER OF A CENTER PART AND A PARTIAL REPAIRING METHOD USING THE SAME, CAPABLE OF EASILY INSERTING THE PARTIAL REPAIRING DEVICE INTO A PIPE BY TEMPORARILY REDUCING THE DIAMETER OF A CENTRAL PORTION OF THE PARTIAL REPAIRING DEVICE DEPENDING ON THE THICKNESS OF A REPAIR MATERIAL

摘要

PURPOSE: A partial repairing device for reducing a diameter of a center part and a partial repairing method using the same are provided to improve accuracy of repair because a sensor for detecting passage of a joined portion is installed in a partial repairing device.;CONSTITUTION: A partial repairing device for reducing a diameter of a center part comprises A partial repairing device(5) for reducing a diameter of a center part comprises a cylinder-shaped tube(13), moving wheels(15), an air pressure injection port(17), a traction line ring(19), and an elastic band(7). The tube is arranged in between both frames(21) and formed into a cylinder shape. The moving wheels are installed in an outer side of the frame and inscribed to the diameter bigger than an outer diameter of the cylinder-shaped tube and rolled. The air pressure injection port is installed in the outer side of the frame. The traction line ring is installed in both outer sides of the frame. The diameter of the elastic ban is formed smaller than the cylinder-shaped tube and fitted into a central portion of the cylinder tube as a ring shape.;COPYRIGHT KIPO 2013