Long high-reliability flexible fireproof cable

Abstract

The invention discloses a long high-reliability flexible fireproof cable which comprises a cable core. A plurality of fireproof insulated wire cores are stranded to form the cable core. Each fireproof insulated wire core comprises a conductor and a ceramic silicon rubber fireproof insulated layer extruded or lapped on the conductor, an insulated layer is coated on each ceramic silicon rubber fireproof insulated layer, an alkali-free glass tape layer and an extruded low-smoke halogen-free outer sheath are sequentially coated on the periphery of the cable core from inside to outside, and fillers are filled in the space between the cable core and the alkali-free glass tape layer. A fine fireproof insulated effect is achieved by the aid of the ceramic silicon rubber fireproof insulated layers, the cable can not only pass static 800 DEG C test in domestic highest-level fire resistant cable test GB / T13033, but also pass a CWZ grade in a fire resistant cable standard BS6387 and completely meet the fire resistant level of a mineral insulated cable, the alkali-free glass tape layer replaces a metal armor layer, and softness of the cable is enhanced.

Description

technical field [0001] The invention relates to the field of cables, in particular to a flexible fireproof cable with large length and high reliability. Background technique [0002] In the past, flame-retardant and fire-resistant wires and cables were often used in public places and high-rise building areas, but there were still many fire accidents, and the smoke released when the cables burned would cause secondary damage to the human body. Therefore, a higher level of fireproof cables came into being. YTTW flexible fireproof cables and BTLY mineral insulated cables are two of them. Not flexible, not conducive to installation. [0003] Also have the cable that adopts vitrified silicon rubber as fireproof layer to appear at present, as Chinese patent announcement number is that CN203276895U discloses TCG vitrified silicon rubber insulated cable, and this cable comprises conductor, insulating layer, isolation layer and tinned copper wire braiding layer, at least A silver-p...

AI Technical Summary

Problems solved by technology

The cable has very good fireproof, fire-resistant, flame-retardant, low-smoke, non-toxic properties, but the TCG ceramic silicon rubber insulated cable has a tinned copper wire braid, which is not flexible enough

[0004] There is also a Chinese patent application publication number of CN102800404A which discloses a ceramic silicon rubber insulated fireproof cable including a cable core. The core is extruded with an armor layer, and the outermost layer is extruded with an outer sheath. The insulated core is composed of an intermediate conductor and a ceramicized silicone rubber insulating layer coated outside the conductor; the performance of the cable fully meets that of a mineral insulated cable. Standard requirements, but the outer layer of the ceramic silicone rubber insulated fireproof cable also has an armor layer, and its flexibility is not enough

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