The flame retardant and fire-retardant sleeve is used for power cable, which is characterized in that the size of the semi cylindrical jacket is equal, the inner diameter of the sleeve formed by two relatively combined tubes is slightly larger than the diameter of power cable 2-3mm, and the power cable is placed in the middle of two semi cylindrical jackets to form an integrated tubular sleeve. According to a flame retardant fire-retardant sleeve for power cable, the fixing component comprises fixing edge and locating bolt, wherein the fixed warping edge is arranged at the side edge of the pipe of the semi cylindrical jacket, and a positioning hole is arranged on the fixed warping edge, and the positioning bolt passes through the positioning hole to combine two semi cylindrical clamp sleeves together.

      The power cable is equipped with flame retardant and fire-retardant sleeve. During installation, the corresponding size of semi cylindrical jacket shall be selected according to the diameter of power cable, then a semi cylindrical jacket shall be fixed on the cable fixing bracket at the ground hole crossing the floor, then the cable shall be placed in the middle of the semi cylindrical jacket, and then the other half cylindrical jacket shall be used to wrap the cable in the middle, Then, fix the support formally. Finally, screw the fixing bolt of the fixing component into the locating hole on the fixed warping edge of the pipe side edge of the semi cylindrical jacket, and combine the two semi cylindrical jackets together, so as to play the role of fire-retardant and flame-retardant sealing of the cable. Finally, the surrounding of the hole and the floor partition layer are filled with fire-retardant materials and the surface is closed with fireproof mud, The surface sealing of the holes in the floor of the outer floor of the flame-retardant protective sleeve shall be conducted with the fire-retardant organic materials not less than 50mm (- 100mm in general).

      During installation, it should also be noted that if the fire-retardant sleeve for power cable of the utility model is used in the middle sandwich position from the upper floor to the lower floor, the power cable of the utility model which has been installed first should pass through the fire-retardant sleeve and be fixed with the cable fixing bracket, and must be connected with the upper and lower half cylindrical jacket, Then, the holes between the floor and the interlayer are filled with fire-proof plugging material and closed with fire-proof mud. 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. The utility model has the following beneficial effects: 1. The utility model has the advantages of simple structure and low cost, but it is made of a variety of non combustible materials through scientific deployment and pressing to wrap the power cable, It can greatly improve the fire resistance and flame retardant performance of power cable in case of fire or short circuit, and avoid the fire caused by the cable short circuit igniting the surrounding combustible or external combustible igniting the cable. 2. The utility model relates to a flame-retardant fireproof sleeve for power cable, which is convenient for installation, has little modification on the original power cable, and does not affect the distribution structure of the original power cable.