At present, a considerable number of power cables are often installed in various power facilities, especially in cable trays and shafts. At present, the cables laid in these cable trays and shafts are exposed. Although the cables themselves are flame retardant cables, the flame retardant time is quite limited in case of real fire, It can not prevent the direct baking combustion of high-temperature flame, and if the high temperature of about 1000 ℃ is produced due to short circuit, it will also cause combustion, which will lead to fire accidents. Moreover, toxic gas will be emitted when the cables are burning. According to the investigation, the toxic gas produced by the burning of cables and other objects in fire accidents is one of the important reasons for the casualties. Therefore, there is a need for a device that can prevent the power cable from burning due to high temperature in case of fire or short circuit, which can prevent the fire caused by the short circuit of the cable and the surrounding combustible materials from igniting the cable, and prevent the fire, so as to protect the safety of power facilities and improve the fire prevention ability of the building.
In order to solve the problem that the power cable under the existing technology can not cope with the fire caused by the short circuit of the cable and the surrounding combustible ignited cable, a kind of flame retardant and fireproof sleeve for power cable is provided. By installing this device on the power cable, it has a higher flame retardant and fireproof ability. The specific structure is as follows: the flame retardant and fireproof sleeve for power cable, including the sleeve, The utility model is characterized in that the sleeve is specifically a hollow semi cylindrical jacket with two semicircular openings;
A fixed component is arranged at the joint of the semi cylindrical jacket. Semi cylindrical jacket is made of a variety of non combustible materials by scientific deployment and pressing. It has good flame retardant performance, non combustion time can reach more than 3 hours when meeting fire, high mechanical strength, non explosion, water resistance, oil resistance, strong chemical corrosion resistance, non-toxic and other characteristics. The best flame temperature can reach 1000 ℃ ° All the indexes meet the requirements of GA161-1997, and the combustion performance meets the class A (incombustibility) standard of GB8624. According to the utility model, a fire-retardant sleeve for power cable is characterized in that the size of the semi cylindrical jacket is equal, the inner diameter of a tubular sleeve formed by two relatively mutual combinations is slightly larger than the diameter of the power cable, and the power cable is placed in the middle of the two semi-circular cylindrical jackets to form an integrated tubular sleeve.
The fire-retardant sleeve for power cable has the following beneficial effects:
1. The structure of the fire-retardant sleeve for power cable is simple and the cost is low, but it is made of a variety of non combustible materials by scientific deployment and pressing. Wrapping the power cable can greatly improve the fire-retardant performance of power cable in case of fire or short circuit, It can avoid the fire caused by the short circuit of the cable to ignite the surrounding combustibles or the external combustibles to ignite the cable.
2. The fire-retardant sleeve used for power cable is easy to install, and the transformation of the original power cable is very few, which does not affect the distribution structure of the original power cable.