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Fire-resistant wire 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 easy falling off, casualties, low quality and reliability, etc., and achieve the effects of excellent flame retardant performance, extended use time, and wide use range

Active Publication Date: 2015-07-01
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 cable and preparation method thereof

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preparation example Construction

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

[0038] Conductor preparation: the conductor material is drawn and twisted to obtain the conductor 1 .

[0039] In the conductor preparation step, it specifically includes three sub-steps: material selection, wire drawing and stranding. Material selection: Select the conductor material to be used according to the requirements of preparing different cables, such as choosing an electrical round copper rod as the conductor material, and comply with the national GB / T3952 standard. Wire drawing: the conductor material is drawn and annealed to obtain a soft copper wire with a diameter that meets the requirements, and the copper wire can be tin-plated or silver-plated copper wire. Stranding: Twisting the soft copper wire obtained by wire drawing to obtain a bundle of strands, and then re-twisting the bundle of strands, ensuring that the adjacent layers ar...

Embodiment 1

[0052] Conductor preparation: the conductor material is drawn and twisted to obtain the conductor 1;

[0053] Extruding the insulation layer: using an extrusion mold to coat the insulation layer 22 on the outside of the conductor 1 to obtain the inner core 2 of the cable;

[0054] Extruded outer sheath: Use vitrified silicone rubber to extrude the outer sheath 1 outside the inner core 2 of the cable. The extrusion die is an extrusion die. The film is an extrusion die, and the extrusion die needs to be polished before extrusion; the cold extrusion method is adopted, the temperature of the feeding port is 5°C, the temperature of the head is 10°C, and the temperature of the body is 30°C; the extruder There are five stages of temperature control from the feed port to the extrusion end, the temperature of the first stage is 160°C, the temperature of the second stage is 165°C, the temperature of the third stage is 170°C, the temperature of the fourth stage is 175°C, and the temperat...

Embodiment 2

[0056] Conductor preparation: the conductor material is drawn and twisted to obtain the conductor 1;

[0057] Extruding the insulation layer: using an extrusion mold to coat the insulation layer 22 on the outside of the conductor 1 to obtain the inner core 2 of the cable;

[0058] Extruded outer sheath: Use vitrified silicone rubber to extrude the outer sheath 1 outside the inner core 2 of the cable. The extrusion die is an extrusion die. The film is an extrusion die, and the extrusion die needs to be polished before extrusion; the cold extrusion method is adopted, the temperature of the feed port is 50 ° C, the temperature of the head is 20 ° C, and the temperature of the body is 50 ° C; the 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, and the fifth stage temperature is 180°C...

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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 pay more and more attention to the safety of life. It is becoming more and more important and urgent. Based on the reports of major fires, the fires caused by spontaneous combustion of wires and cables account for a large proportion. [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 mic...

Claims

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Application Information

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