Mineral insulated sheath-free flexible flame-retardant cable

Abstract

The invention discloses a mineral insulated sheath-free flexible flame-retardant cable. The mineral insulated sheath-free flexible flame-retardant cable comprises cable cores; each cable core consistsof multiple insulated wire cores in a stranding manner; the gaps among the cable cores are filled with carbon fibers; a three-into-one fluorophlogopite wrapping band is arranged outside the cable cores; an extruded fireproof expansion layer is arranged outside the three-into-one fluorophlogopite wrapping band; a non-magnetic metal band is arranged outside the fireproof expansion layer; and the outer surface of the non-magnetic metal band is coated with a fireproof coating layer and then a cable composite tube. The mineral insulated sheath-free flexible flame-retardant cable has the characteristics of high corrosion resistance, high thermal insulation, high strength performance as well as high flame retardancy and the like.

Description

Technical field [0001] The invention relates to the field of wires and cables, in particular to a mineral insulated non-sheathed flexible flame-retardant cable. Background technique [0002] Fire refers to a disaster caused by burning out of control in time and space. Among various disasters, fire is one of the main disasters that most often and most commonly threaten public safety and social development. [0003] In order to save more lives, property and information from the ruthless fire scene, the application of fireproof cables has become the top priority, and the current fireproof cables on the market can be divided into rigid and flexible according to their structural characteristics. Due to the shortcomings in reliability, production and laying of rigid mineral insulated cables (Mineral Insulated Cable), MI cables for short, they are gradually withdrawn from the market in developed countries in Europe and America. Flexible mineral insulated fireproof cables have become the ...

AI Technical Summary

Problems solved by technology

Generally, the metal sheath of the cable is made of copper, the process is more complicated, the efficiency is low, and the cost is high. The isolation layer is often made of a material with a lower heating temperature, which cannot form isolation, so that the insulation material will be damaged by heat, which often leads to cable short circuit and other phenomena.

[0004] In addition, with the rapid development of communication cables and power cables, cables are more widely used in our daily life and their role is becoming more and more important. The protection requirements for cables are also getting higher and higher, and the cable tube must have a certain strength. and pressure resistance, but also must have anti-seepage ability, the cable tube in the prior art is mainly made of fiber cement tube, but this kind of cable tube is heavy, poor flexibility, very inconvenient to use

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