Device for mounting polyvinyl sheath in sealing structure of detection device of electronic endoscopy

The invention relates to a device for mounting a polyvinyl sheath in the sealing structure of a detection device of an electronic endoscopy. The device comprises a copper pipe and a through end. The through end is mounted in the middle of the copper pipe, the inside diameter of the copper pipe is larger than the external diameter of the polyvinyl sheath, the polyvinyl sheath is inserted in the copper pipe, and turned-over edges are formed at two ends of the polyvinyl sheath at the end parts of the copper pipe; and the through end is communicated with a suction pump, the suction pump extracts air through the through end in the middle of the copper pipe, vacuum is generated between the inner wall of the copper pipe and the polyvinyl sheath, and the polyvinyl sheath is expanded and is adhered to the inner wall of the copper pipe, so that a wire screen shield can be conveniently inserted in the polyvinyl sheath, the suction pump is removed finally, the polyvinyl sheath is restored to the original and is tightly wrapped on the wire screen shield, and the polyvinyl sheath is easily mounted on the polyvinyl sheath .