At present, in order to achieve the purpose of thermal protection, the cable fire sleeve in the existing technology is usually covered with a layer of adhesive mainly composed of acrylic acid on the surface of glass fiber braided tube. The acrylic acid coating can play a good role in thermal protection and is widely used in high temperature environment; However, when acrylic sleeve and heat shrinkable tube are used at the same time, a lot of smoke will be produced in the case of thermal cutting and welding, which has a great impact on the installation and working environment of cable fire sleeve; Moreover, in the installation of the existing cable fireproof sleeve, the cable fireproof sleeve cannot be connected with the cable fireproof sleeve, so it must be connected by tape or other connecting devices, which leads to the instability of the connection of the cable fireproof sleeve. Therefore, a new type of cable fireproof sleeve with high temperature resistance, good insulation performance and high temperature resistance is developed Easy to install and easy to connect the cable fire sleeve has important application significance.

     In order to overcome the shortcomings of the existing cable fireproof sleeve and solve the inconvenience problem when people use the cable fireproof sleeve as much as possible, a new type of cable fireproof sleeve with high temperature resistance, good insulation performance, easy installation and easy connection is provided.

      The cable fireproof sleeve comprises a tube body and a tube wall covering the surface of the tube body, the tube body is made of glass fiber, the tube wall comprises an outer covering layer covering the outer side of the tube body and an inner covering layer covering the inner side of the tube body and filling the gap between the glass fibers, the covering layer is made of silicone, and the inner wall of the tube body is provid

ed with an inner wall. The thickness of the pipe wall is not less than 3mm.

      Compared with the prior art, the effect of the new type is that a threaded interface and a connecting flange are arranged at the end of the cable fireproof sleeve, so that the installation and connection of the cable fireproof sleeve are more convenient, and the connection is more firm and feasible; In general, it has the advantages of high temperature resistance, good insulation performance, easy installation and easy connection.