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Fire-resistant wire and cable and preparation method thereof

A wire and cable, fire-resistant technology, applied in the field of fire-resistant wire and cable and its preparation, can solve the problems of low quality reliability, easy falling off, casualties, etc., and achieve the effects of wide application range, excellent flame retardant performance, and extended service time

Active Publication Date: 2017-01-04
ANHUI LIANJIAXIANG SPECIAL CABLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Moreover, in the fire, the proportion of casualties caused by wires and cables also accounts for a large proportion. For example, the power transmission of the wires and cables that withstand power transmission is interrupted in a short period of time after the fire broke out, causing elevators and lighting to be abnormal. work, causing people to panic and cause casualties
[0004] Usually, fire-resistant cables use mica tape to wrap the outer sheath, which not only has low production efficiency, but also is difficult to control and has low quality reliability. Moreover, the mica tape cannot withstand excessive voltage, and it becomes hard and brittle after burning, which is easy to fall off
Once a fire breaks out, the mica layer will easily turn into powder and fall off, losing its protective effect, and it cannot withstand water showers and impacts, which will affect the safe and smooth communication and power in case of fire.

Method used

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  • Fire-resistant wire and cable and preparation method thereof

Examples

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Effect test

preparation example Construction

[0037] The invention also provides a method for preparing the fire-resistant wire and cable, which includes the following steps:

[0038] Conductor preparation: After drawing and twisting the conductor material, conductor 1 is obtained.

[0039] In the conductor preparation step, it specifically includes three sub-steps: material selection, wire drawing and stranding. Material selection: Choose the conductor material used according to the requirements of preparing different cables. For example, choose electrical round copper rod as the conductor material and comply with the national GB / T3952 standard. Wire drawing: wire drawing and annealing the conductor material to obtain soft copper wire with a required diameter, and the copper wire can be tin-plated or silver-plated copper wire. Twisting: twist the soft copper wire obtained by drawing to obtain a bundled stranded wire, and then twist the bundled stranded wire to ensure that the adjacent layers are twisted in opposite direction...

Embodiment 1

[0052] Conductor preparation: After drawing and twisting the conductor material, conductor 1 is obtained;

[0053] Extruding the insulating layer: using an extrusion die to coat the insulating layer 22 on the conductor 1 to obtain the cable inner core 2;

[0054] Extrusion outer sheath: the outer sheath 1 is extruded outside the inner core 2 of the cable with ceramic silicon rubber, the extrusion die is an extrusion die, and the inner die of the extrusion die is a casing die and an outer The film is an extrusion die, and the extrusion die needs to be polished before extrusion; cold extrusion is used, the temperature of the feed port is 5°C, the temperature of the die is 10°C, and the temperature of the body is 30°C; extruder There are five stages of temperature control from the feed port to the extrusion end. The temperature of the first stage is 160℃, the temperature of the second stage is 165℃, the temperature of the third stage is 170℃, and the temperature of the fourth stage is...

Embodiment 2

[0056] Conductor preparation: After drawing and twisting the conductor material, conductor 1 is obtained;

[0057] Extruding the insulating layer: using an extrusion die to coat the insulating layer 22 on the conductor 1 to obtain the cable inner core 2;

[0058] Extrusion outer sheath: the outer sheath 1 is extruded outside the inner core 2 of the cable with ceramic silicon rubber, the extrusion die is an extrusion die, and the inner die of the extrusion die is a casing die and an outer The film is an extrusion die, and the extrusion die needs to be polished before extrusion; cold extrusion is used, the temperature of the feed port is 50°C, the temperature of the die is 20°C, and the temperature of the body is 50°C; extruder There are five stages of temperature control from the feed port to the extrusion end, the first stage temperature is 180°C, the second stage temperature is 185°C, the third stage temperature is 175°C, the fourth stage temperature is 180°C, the fifth stage The...

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Abstract

A fire-resistant wire cable and a manufacturing method therefor. The fire-resistant wire cable comprises an outer sheath (1) and at least one cable inner core (2) covered inside the outer sheath (1). Each cable inner core (2) comprises a conductor (21) and an insulating layer (22) covering the outside of the conductor (21). The outer sheath (1) is made of material containing ceramifying silicone rubber. An outer sheath protective layer is formed outside the conductor using material containing ceramifying silicone rubber so that when a large fire occurs, a hard protective layer is formed on the outer surface of the cable inner core, thereby protecting a line so as not to break or short-circuit. The hard ceramic-like shell thus formed does not crack under 900oC x 90 minutes of flame ablation, thereby extending the usage time of a cable in a fire. The present fire-resistant wire cable is resistant to high and low temperatures, is anticorrosive and flame retardant, and has excellent electrical insulation properties. The present fire-resistant wire cable has a wide range of uses, and is better suited to locations in harsh environments.

Description

Technical field [0001] The invention relates to the technical field of power cables, and more specifically, to a fire-resistant wire and cable and a preparation method thereof. Background technique [0002] With the continuous progress and development of society and the improvement of people’s living standards, people are paying more and more attention to safety in their lives. However, when people are pursuing high-quality life, enjoying large shopping malls, large theaters and other group life, fire safety is also increasing. It is becoming more and more important and urgent. Comprehensive reports on the occurrence of major fires, among which fires caused by spontaneous combustion of wires and cables account for a large proportion. [0003] In addition, the proportion of personal injuries and deaths caused by wires and cables in fires also accounts for a large proportion. For example, the wires and cables that bear the power transmission within a short time after the fire are int...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B7/29H01B7/295H01B9/00H01B7/28H01B7/285
CPCH01B7/295H01B3/28H01B3/46
Inventor 黄冬莲
Owner ANHUI LIANJIAXIANG SPECIAL CABLE