A kind of flexible fireproof cable and preparation method thereof

Abstract

The invention discloses a flexible fireproof cable and a preparation method thereof. The cable is a four-core cable core, including three conductor cores, a ground wire, a tape layer and an inner sheath, and also includes a ceramic polyolefin outer sheath; A filler layer is provided on the periphery of the conductor core and the ground wire; the outer periphery of the filler layer is covered with a tape layer; the outer layer of the tape layer is covered with an inner sheath; the outer sheath of the inner sheath is covered with an outer sheath; The inside of the conductor core and the ground wire are sequentially provided with a conductor, an insulating layer, a high-temperature color separation tape and a wrapping layer from the inside to the outside. The preparation method is as follows: first prepare the ceramic polyolefin outer sheath material, then place the copper strip, adjust the tension, position the strip, finely cut the waste edge, longitudinal wrapping, longitudinal seam welding, eddy current flaw detection, cooling and lubrication, stretching Sizing, embossing, cleaning and drying, extruding the outer sheath, cable laser coding, and cable arrangement to make a flexible fireproof cable. The invention has good flexibility, high temperature resistance, explosion-proof and other performances, the cable can work at 250°C for a long time, and the temperature can be as high as 1600°C when encountering fire.

Description

technical field [0001] The invention relates to the field of electric equipment and its manufacture, in particular to a flexible fireproof cable and its preparation method. Background technique [0002] In the prior art, the insulating materials of cables and wires are all organic polymer materials, which are easily carbonized under flame conditions and lose their insulating effect. Fireproof cables are key equipment for the entire power infrastructure and fire protection systems. If there is no good fireproof conductive system, the power transmission and transformation system will be paralyzed. How to play a normal power transmission function under flame conditions is a difficult problem for fireproof cables. [0003] At present, magnesium oxide fireproof cables have been widely used at home and abroad, but they are affected by many aspects such as manufacturing length and insulation performance, and their application range is small, and they cannot be produced in large le...

AI Technical Summary

Problems solved by technology

[0003] At present, magnesium oxide fireproof cables have been widely used at home and abroad, but they are affected by many aspects such as manufacturing length and insulation performance, and their application range is small, and they cannot be produced in large lengths and cannot be bent; The cable not only solves the problem of low bending performance of the magnesium oxide fireproof cable, but the copper as the outer sheath is easily oxidized and affects the fireproof performance

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