Flexible fireproof cable production process

Abstract

The invention discloses a flexible fireproof cable production process which comprises the following steps: S1, drawing a copper bar into copper wires, and twisting the copper wires to form a copper conductor; S2, wrapping a flame-retardant composite belt outside the conductor to form a fireproof layer, and then extruding ethylene propylene rubber outside the fireproof layer to form an insulating layer; S3, bundling at least two conductive cable cores, and then filling the periphery of the bundled conductive cable cores with high-flame-retardant inorganic matters to obtain a filling layer; S4, wrapping a mica tape outside the filling layer to obtain a mica wrapping layer, and then extruding ceramic silicone rubber outside the mica wrapping layer to form a lining layer; S5, wrapping the outside of the lining layer with an aluminum alloy metal belt to form an aluminum sheath; and S6, braiding outside the aluminum sheath to form a braided layer, and finally extruding crosslinking modified low-density polyethylene outside the braided layer to form a sheath layer, thereby obtaining the flexible fireproof cable. The flexible fireproof cable produced by the process disclosed by the invention has good heat insulation property, insulating property and aging resistance.

Description

technical field [0001] The invention relates to the field of fireproof cables, in particular to a production process for flexible fireproof cables. Background technique [0002] In recent years, due to the country's emphasis on environmental protection and fire safety, the research and development and design of the wire and cable industry have developed in the fields of environmental protection and safe use performance. Flexible mineral insulated cables NG / A-(BTLY), BBTRZ, etc. can maintain power supply in a fire and withstand the impact of fire water spray and heavy objects falling, so they are designed for the construction field with high environmental protection requirements and strict safety factor level requirements widely used. In places with dense population and high fire safety level, due to the complexity of the laying site, the fireproof cables used may not be in place due to the special structure of the main cable and branch cable joints. Once the structure of th...

AI Technical Summary

Problems solved by technology

In places with dense population and high fire safety level, due to the complexity of the laying site, the fireproof cables used may not be in place due to the special structure of the main cable and branch cable joints. Once the structure of the fireproof cable is damaged, it is inevitable Cause safety hazards, and will make the cable lose fire protection, environmental protection and other performance

[0003] Existing flexible fireproof cables mostly adopt copper sheath structure, the bending radius of the cable is small, it is difficult to bend a large arc, and it is convenient to install in a small space

At the same time, the fireproof performance of the existing flexible fireproof cables is still insufficient. After a fire occurs, the cable core inside the cable cannot be isolated and blocked from burning.

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