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Flame-retardant cable

A cable and a common technology, applied in the field of fireproof cables and flame retardant, can solve the problems of high flame retardant temperature, easy to be affected by moisture and deformation, and reduce cable performance, etc., to achieve good mechanical properties and temperature resistance and flame retardant performance, excellent results, The effect of low product cost

Inactive Publication Date: 2011-05-25
广东电缆厂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The newly used halogen-free flame retardants have less smoke, little or no toxicity, but contain a lot of hydrated substances. When the temperature is high, the dehydration reaction reduces the physical and mechanical properties of the cable, so the flame retardant temperature cannot be high.
In short, due to the use of a single flame retardant material, the cable either produces a lot of smoke and toxic gases or reduces the performance of the cable due to dehydration reaction, thus affecting the flame retardant temperature and flame retardant time of the cable
As we all know, due to the heavy rain in southern my country, the cable trenches or cable tunnels are relatively easy to be washed and damp by rainwater, and the traditional fireproof sealing materials used in traditional cable trenches, such as inorganic blockage materials or fire retardant bags, are washed by rainwater. , easy to be deformed by moisture, poor in stability, and the effective performance of fire resistance is seriously affected, and it is difficult to achieve the effects of flame retardancy, fire prevention and moisture resistance

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0021] A cable according to the present invention, wherein the insulating rubber contains three wires, wherein the wires are composed of wires covered with an insulating layer; wherein there are three wires twisted together, and the three wires The wires are coated with fireproof paint. The above-mentioned outer insulating layer has a thickness of 5mm.

[0022] The preparation method of the fireproof coating is as follows: Accurately weigh according to the molar ratio of dimerized linoleic acid and diamine as 1:1, preheat the dimerized linoleic acid to 125°C, gradually add the mixed diamine dropwise, and wait for 20 minutes After the internal drop is completed, slowly increase the reaction temperature at a heating rate of 20°C / h until it rises to 235°C, then add accurately weighed, preheated liquid nitrile rubber; keep this temperature for at least 1 hour, and measure and distill When the water out reaches 80% of the theoretical amount, it can be decompressed gradually; final...

Embodiment 2

[0025] A cable according to the present invention, wherein the insulating rubber contains three wires, wherein the wires are composed of wires covered with an insulating layer; wherein there are three wires twisted together, and the three wires The wires are coated with fireproof paint. The above-mentioned outer insulating layer has a thickness of 1mm.

[0026] The preparation method of the fireproof coating is as follows: according to the molar ratio of dimerized linoleic acid and diamine is 0.92:1, accurately weigh, preheat the dimerized linoleic acid to 125-130 ° C, gradually add the mixed diamine, After dropping within 50 minutes, slowly increase the reaction temperature at a heating rate of 20°C / h until it reaches 235°C, add accurately weighed, preheated liquid nitrile rubber; keep this temperature for at least 1 hour, and Measure the distilled water, when it reaches 80% of the theoretical amount, you can gradually reduce the pressure; finally complete the whole reaction...

Embodiment 3

[0029] A cable according to the present invention, wherein the insulating rubber contains three wires, wherein the wires are composed of wires covered with an insulating layer; wherein there are three wires twisted together, and the three wires The wires are coated with fireproof paint. The above-mentioned outer insulating layer has a thickness of 20 mm.

[0030] The preparation method of the fireproof coating is as follows: Accurately weigh according to the molar ratio of dimerized linoleic acid and diamine as 1.12:1, preheat the dimerized linoleic acid to 130°C, gradually add the mixed diamine dropwise, at 20 After dropping within -50min, slowly increase the reaction temperature at a heating rate of 20°C / h until it reaches 235°C, add accurately weighed, preheated liquid nitrile rubber; keep this temperature for at least 1 hour, and Measure the water that distills out, when reaching 80% of theoretical amount, can carry out gradual decompression; Finally complete whole reacti...

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Abstract

The invention relates to a flame-retardant cable, in particular to a flame-retardant and fireproofing cable used by power stations and power plants, and belongs to the technical field of cables. The cable provided by the invention has three leads encapsulated in an insulation rubber skin, wherein each lead is covered with an insulation layer outside; and the three leads are twisted together and coated with flame-retard coating outside. The cable product provided by the invention has very high physical, mechanical, temperature-resistant and flame-retardant properties; and the performance indexes such as 200 DEG C thermal stabilization time, a breakage extension ratio, the stretching strength of temperature-resistant and flame-retardant materials, impact brittle temperature, volume resistivity, dielectric strength and the like are superior to both the international standard and the national standard. According to the standard test of International Electrotechnical Commission (IEC), a high-temperature resistant flame-retardant formula reaches or is superior to the IEC standard in terms of the performance indexes such as mechanical performance, aging performance, low-temperature resistant performance, insulation performance, darkness of smog, damage indexes of fume damage, toxicity indexes, the acid value of smog and the like.

Description

technical field [0001] The invention relates to a cable, in particular to a flame-retardant and fireproof cable used in a power station and a power plant. It belongs to the technical field of cables. technical background [0002] At present, people's need for fast transmission of data and information, and their dependence on computers, word processors, telex, sensors and communication equipment are increasing significantly and rapidly. The emergence of new technologies has made it possible to connect and network equipment in this area, leading to the comprehensive development of communication systems. The use of these systems has increased in specific areas such as high-rise buildings, ships, aircraft, trains, drilling platforms and mines. In order to connect these electronic components, a large number of wires and cables are used in these structures and fields. Typically, installation of wire and cable in air conditioning systems and wire and cable ducts are convenient a...

Claims

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Application Information

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IPC IPC(8): H01B7/02H01B7/295
Inventor 周海燕陈相忠郭伟明
Owner 广东电缆厂有限公司
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