Mineral insulated fireproof cable

Abstract

The invention discloses a mineral insulated fireproof cable. The mineral insulated fireproof cable comprises a cable core which is formed by twisting three insulated wire cores; and gaps of the cablecore are filled with non-moisture absorption filling strips, the cable core is coated with a first glass fiber composite fireproof layer in a wound mode, the first glass fiber composite fireproof layer is coated with a semiconducting self-adhesive tape in a wound mode, the semiconducting self-adhesive tape is coated with a cold-resistant, flame-retardant and high-tear resistance chlorinated polyethylene rubber inner sheath in an extruded mode, the cold-resistant, flame-retardant and high-tear resistance chlorinated polyethylene rubber inner sheath is coated with a second glass fiber compositefireproof layer in a wound mode, a steel belt is woven on the exterior of the second glass fiber composite fireproof layer, and the steel belt is coated with a cold-resistant, flame-retardant and high-tear resistance chlorinated polyethylene rubber inner sheath in an extruded mode. The mineral insulated fireproof cable has the advantages of being resistant to high temperature, non-inflammable, resistant to corrosion, insulated to heat, high in tensile strength, good in electrical insulating performance and the like.

Description

technical field [0001] The invention relates to the field of cables, in particular to a mineral insulated 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. 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 length of manufacture. The core conductor makes the cable hard, hard to bend and straight, difficult to connect, easy to get...

AI Technical Summary

Problems solved by technology

However, in the actual production process, silane cross-linked polyethylene is used for insulation, which is a flammable material. Although the external flame retardant material is used, in case of fire during use, the cable insulation will also melt and drop after the external flame retardant material is burned. Combustion, can not guarantee the safety and reliability of the line

Images