A double-flame-retardant power cable special for fire fighting

Abstract

The invention discloses a double-flame-retardant power cable for fire fighting, comprises a first cable and a second cable, one side of the first cable is provided with the second cable, the tail endsof the first cable and the second cable are provided with interfaces, and the outer parts of the first cable and the second cable are connected with a pull mechanism in a clamping manner, the insideof the first cable is provided with a sheath, and a mineral fire-insulation layer. The double-flame-retardant power cable has a good flame-retardant effect, when the first cable and the second cable are used in case of a fire-fighting fire danger, due to the functions of the mineral fire-insulation layer and a ceramic fiber refractory layer, The first cable and the second cable can be prevented from being burned, and the pulling mechanism is arranged for facilitating pulling the first cable and the second cable by a user, thereby realizing the pulling work of the first cable and the second cable at the same time, facilitating the use, and the shielding layer arranged, which can isolate the interference of external signals to the first cable and the second cable, thereby ensuring the normaloperation of the first cable and the second cable.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to a dual-flame-retardant power cable for fire protection. Background technique [0002] Cables are usually composed of several wires or groups of wires. Each group of wires is insulated from each other and is often twisted around a center. The entire outer surface is covered with a highly insulating covering. The cable has the characteristics of internal energization and external insulation. [0003] A Chinese patent discloses a three-core super-flexible cable. (Authorized announcement number CN205318870U). This patented technology can make the cable core have better flexibility, and can also improve the overall flexibility of the cable. The net test tensile strength is as high as 15.8 MPa, and the elongation at break is as high as 186%. However, the existing cables have extremely poor flame retardancy. When the first cable and the second cable are pulled by a fire hazard, the first...

AI Technical Summary

Problems solved by technology

[0003] A Chinese patent discloses a three-core super-flexible cable. (Authorized announcement number CN205318870U). This patented technology can make the cable core have better flexibility, and can also improve the overall flexibility of the cable. The net test tensile strength is as high as 15.8 MPa, and the elongation at break is as high as 186%. However, the existing cables have extremely poor flame retardancy. When the first cable and the second cable are pulled by a fire hazard, the first cable and the second cable will be burned out. , there is no pulling mechanism, it is not convenient for the user to pull the first cable and the second cable, and the simultaneous pulling work of the first cable and the second cable cannot be realized. There is no shielding layer, and the external signal cannot be isolated from the first cable and the second cable. The interference of two cables causes signal failure

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