Novel composite flame-retardant cable

Abstract

The invention discloses a novel composite flame-retardant cable. The cable has a two-layer flame-retardant protection function because a ceramic silicon rubber composite tape is wound outside a conductor, and a mica tape is wound outside the ceramic silicon rubber composite tape; two high-flame-retardant materials are used for protection when the cable encounters fire and is burnt, and a closed ceramic pipe is formed when the outer flame-retardant silicon rubber tape encounters the fire and is burnt, so that flames and spraying water can be insulated, the inner mica tape is protected from damage, and the inner mica tape still can play a good flame-retardant protection effect even if the silicon rubber ceramic pipe is broken. According to the ceramic silicon rubber composite tape winding structure, the cable diameter can not be greatly increased, the cable is flexible when being used normally, and materials can be saved; specific extrusion equipment is not required to be arranged during processing; and the ceramic silicon rubber composite tape is wound inside an outer sheath, and the surface performance of the cable is not influenced at all. The cable still can normally work when the cable is burnt for over 120min at a temperature of 950+50 DEG C, and the water is immediately sprayed lasts for 3 minutes.

Description

technical field [0001] The invention relates to power cables, in particular to a novel composite fire-resistant cable. Background technique [0002] Fire-resistant wires and cables are used in various high-rise building facilities, business centers, information network centers (computer control centers), large storage centers, ships, oil platforms, subways, hospitals, metallurgy, chemicals, fire alarm systems and aircraft control systems, etc. For occasions with high fire protection requirements, fire-resistant wires and cables have been gradually replaced by ordinary cables at home and abroad, especially in foreign countries, where fire-resistant wires and cables have been very popular. There are two commonly used fire-resistant cables. One is mineral insulated fire-resistant cables. This type of fire-resistant cable has a higher grade, but the equipment investment for cable production is high, the return is small, and the production is difficult. The length of cable manufa...

AI Technical Summary

Problems solved by technology

However, the outer sheath needs to be extruded, which requires special extrusion equipment, and due to the poor processing performance of ceramic fire-resistant and refractory silicone rubber, the extrusion wall thickness must not be thin enough, which will greatly increase processing cost and raw material cost

In addition, due to the poor processability of ceramic fireproof and refractory silicone rubber, the extrusion process is not well controlled, and the surface quality of the obtained product is not good.

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