The fire-proof sleeve mainly protects the exposed optical fiber and wires, and plays the role of heat insulation, so that the line will not be easily aged and damaged. Most of the existing casings are divided into two types: closed type and open type, the inner diameter of closed casing is fixed, only various kinds of casing with different inner diameter can be produced according to the needs of customers. The disassembly and installation of wire harness are not convenient. When the line problems need to be repaired, it is not convenient, only can be destroyed and can not be reused; The inner diameter of the open type casing can be adjusted according to the needs. The structure is generally cylindrical and the flexibility is limited. When the wire harness is more, some of the harnesses will still be exposed outside, which is not beautiful and the dust-proof effect is not good, and the safety hazard may appear when the harness is exposed for a long time; Therefore, how to solve the above problems has become an urgent problem.

     The zipper Velcro type fireproof sleeve has good protection effect, convenient installation and maintenance, and can be reused. It is suitable for various places.

      The zipper Velcro type fireproof sleeve comprises a sleeve body, a Velcro and a zipper. The zipper is sewn on the edges of both ends of the sleeve body, and the Velcro is sewn on both sides of the sleeve body. The Velcro includes a child buckle and a female buckle, the child buckle is sewn on the front side of the sleeve body, the female buckle is sewn on the back side of the sleeve body, and the pull chain includes a first chain belt and a second chain belt, and the child buckle and the first chain belt are sewn on one side of the sleeve, The female buckle and the second chain belt are sewn on the other side of the casing body.

      The sleeve combines the zipper and the Velcro, which is equivalent to the open type, so that the sleeve is more flexible in use, easy to install, and can be reused; The inner part of the sleeve is irregular and can be changed according to the shape of the wire harness, so it has good flexibility; The casing body is woven with polyester multifilament, which has good wear resistance, corrosion resistance, as well as strong scalability and expansion performance; Flame retardant zipper is used to improve the fire resistance; The sleeve of the utility model is suitable for the protection of various wire harness in automobile industry, high-speed railway industry, industrial equipment, office space, cinema, etc., especially in the field of wire harness with irregular shape.