Fireproof cable

Abstract

The invention discloses a fireproof cable, and relates to the technical field of cables. The fireproof cable comprises a conductor, wherein a wrapping tape, a metal shielding layer, a fireproof insulating layer, an armor layer and an outer sheath are sequentially arranged outside the conductor. The fireproof insulating layer comprises an inner lining layer, an inorganic mineral substance layer andan outer lining layer, and the inner lining layer, the inorganic mineral substance layer and the outer lining layer are sequentially arranged from inside to outside, and the thickness ratio of the inner lining layer to the inorganic mineral substance layer to the outer lining layer is 3:1:2. The inorganic mineral substance layer is powdery and is clamped between the inner lining layer and the outer lining layer, and meshes are arranged on the surfaces of the inner lining layer and the outer lining layer. The conductor is protected through the wrapping tape, the metal shielding layer, the fireproof insulating layer, the armor layer and the outer sheath, and the wrapping tape, the metal shielding layer, the fireproof insulating layer, the armor layer and the outer sheath are sequentially arranged from inside to outside, and the conductor has stable structure. During use, the cable can be buckled, and the cable has strong adaptability. When a fire hazard happens, the inorganic mineral substance layer in the fireproof insulating layer plays a main isolation role, and the inner lining layer and the outer lining layer play a role in locking the inorganic mineral substance layer, so thatthe flow of the inorganic mineral substance layer is reduced, and the stability of the fireproof performance of each position of the whole cable is ensured.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to a fireproof cable. Background technique [0002] At present, the construction market, especially the buildings in the main public places, has higher and higher requirements for fire protection. It is required that the low-voltage power cables with fire resistance performance not only do not burn themselves, do not spread and expand the fire, but also require fire resistance in the case of flames, water and vibrations. Under normal power transmission, to win precious time for fire fighting and rescue of people's lives and property. [0003] Traditional fireproof cables generally use mineral insulation (magnesium oxide) and copper tube sheaths. Although they have certain fireproof performance, there are many problems. These problems are mainly due to the short manufacturing length and difficulty in long-distance transportation. The cable is hard, difficult to bend and straighten, d...

AI Technical Summary

Problems solved by technology

[0003] Traditional fireproof cables generally use mineral insulation (magnesium oxide) and copper tube sheaths. Although they have certain fireproof performance, there are many problems. These problems are mainly due to the short manufacturing length and difficulty in long-distance transportation. The cable is hard, it is difficult to bend and straighten, the joint is difficult, and the use environment is severely restricted, which seriously affects the use and promotion of fireproof cables

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