With the increasing emphasis on the protection of ecological environment and their own health, higher and more comprehensive requirements are put forward for the safety performance of cables. Fire resistant cable is widely used in high-rise buildings, hotels, supermarkets, hospitals, stations, and other public places, so that in case of fire, it can ensure the smooth flow of power and communication in a certain period of time, maximize the rescue time of Baosi, and reduce the loss.

      However, the existing safety protection of urban power optical cable in the cable trench is mainly to set a protective sleeve outside the optical cable, and the existing protective sleeve structure is mainly made of alkali free glass fiber tube as the inner sleeve, and then coated with high temperature resistant and heat insulation coating on the surface of the inner sleeve, which is made by baking process, Although this kind of high-temperature insulation sleeve improves the high-temperature resistance of the optical cable to a certain extent, it does not have arc resistance. In the cable trench laid in the same trench, this traditional structure of glass fiber tube can not meet the requirements.

      The fireproof sleeve for wire and cable has simple structure, not only good high temperature resistance, but also good insulation and flame retardancy. In addition, the sleeve is soft and easy to lay. The utility model relates to a fireproof sleeve for wires and cables, which comprises a glass fiber yarn layer with a ring-shaped cross section. The outer surface of the glass fiber yarn layer is provided with a carbon fiber cloth layer, and the carbon fiber cloth layer is covered with a silicone rubber layer. The glass fiber yarn layer is woven by alkali free glass fiber yarn. Carbon fiber cloth layer is made of polypropylene fiber carbonization. The silicone rubber layer is composed of a composite flame retardant added to the silicone rubber, and then fused onto the carbon fiber cloth layer after post vulcanization treatment.

      At present, the domestic and foreign fire-resistant cables are mainly equipped with a protective sleeve on the conductive outer layer of the cable, while the existing protective sleeve structure is mainly made of alkali free glass fiber sleeve as the inner sleeve, and then coated with high-temperature heat insulation coating on the surface of the inner sleeve, and after baking, a layer of aramid wire braided sleeve is woven on the high-temperature heat insulation coating, Although this kind of high-temperature insulation sleeve improves the high-temperature resistance of the cable to a certain extent, in some special occasions, the high-temperature resistance of this traditional structure of glass fiber tube still can not meet the needs.

      In view of the shortcomings of the prior art, the purpose of the utility model is to provide a high temperature resistant silicone rubber fireproof sleeve. The high temperature resistant silicone rubber fireproof sleeve comprises a glass fiber yarn layer with annular cross section, a silicone rubber layer arranged on the inner surface of the glass fiber yarn layer, and an aluminum film winding belt is wound on the outer surface of the glass fiber yarn layer. The outer surface of the glass fiber yarn layer is coated with a silicone layer. The glass fiber yarn layer is woven by alkali free glass fiber yarn.

      The aluminum film winding tape comprises an alkali free glass fiber cloth, an aluminum coating film and a high temperature resistant flame retardant adhesive, and the alkali free glass fiber cloth is bonded with the aluminum coating film through a high temperature resistant flame retardant adhesive. The silicone resin layer is coated with a high temperature resistant heat insulation layer. The heat-resistant insulation layer is 1.2-1.8mm. Compared with the prior art, the utility model has the following advantages: the outer surface of the glass fiber yarn layer is wrapped with an aluminum film winding belt, so that the glass fiber sleeve has good anti radiation performance; when encountering strong heat flux radiation, most of the heat flux is effectively reflected out through the aluminum film winding belt; meanwhile, the inner surface of the glass fiber yarn layer of the silicone rubber glass sleeve is coated with a silicone rubber layer, Through the silicone rubber layer can effectively improve the heat resistance of the glass fiber sleeve, so that the glass fiber sleeve has a good high temperature resistance.