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High-performance flexible fire-resistant cable

A fire-resistant cable, high-performance technology, applied in the direction of insulating cables, cables, circuits, etc., can solve the problems of high equipment investment, increased copper consumption, and high cable costs, and achieve simple production process conditions, improved fire resistance, and excellent fire resistance. Effect

Inactive Publication Date: 2017-02-22
龙川秀康威达新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] (1) Since the magnesium oxide cable is made of seamless steel pipe as the outer sheath, the amount of copper is increased, and the cost of the cable will be much higher;
[0010] (2) The production of magnesium oxide cables also has special requirements for production equipment, and the investment in equipment is relatively high;
Since this type of ceramic polymer material will form tiny cracks when the temperature is unstable, especially in the case of temperature fusion, it is difficult for this type of fire-resistant cable using ceramic materials alone to pass the existing vibration and spray requirements.
[0013] 3. Traditional conductor + mica tape (refractory layer) + ordinary polymer insulation material. This kind of structure fire-resistant cable, in the case of burning, the polymer material insulation layer melts or turns into ashes, and the mica tape refractory layer is very fast at the flame temperature. Rapid embrittlement, it is also difficult to meet the fire resistance test requirements of vibration and spray resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 1 as shown,

[0043] A high-performance flexible fire-resistant cable, including a conductor 1, the conductor 1 includes a copper conductor, which is tinned or not tinned, and can be formed by a single copper wire or twisted into a single strand by no less than two copper wires ; The inner conductor 1 of the cable is a single strand;

[0044] The conductor 1 is covered with a mica tape refractory layer 12, a special polymer material insulation layer 13, an aluminum foil mica paper layer 14, and an outer sheath layer 15 sequentially from the inner layer to the outer layer.

[0045] The mica tape refractory layer 12 is any one of synthetic mica tape, muscovite tape, or phlogopite mica tape, and the synthetic mica tape is the best. The wrapping thickness of the mica tape refractory layer 12 is 0.2-0.5mm, with 2-3 layers of wrapping.

[0046] The special polymer material insulation layer 13 is a polymer material with a residue of more than 75% after burnin...

Embodiment 2

[0051] Such as figure 2 as shown,

[0052] A high-performance flexible fire-resistant cable, the cable includes a conductor 2, the conductor 2 includes a copper conductor, tinned or not tinned, the inner conductor 2 of the cable is not less than 2 strands, and this embodiment uses 4 strands.

[0053] Each strand of conductor 2 is coated with a mica tape refractory layer 22 and a special polymer material insulation layer 23 from the inside to the outside in sequence, and then is covered with an aluminum foil mica paper layer 24 and an outer sheath layer 25 in sequence. The conductor of the mica tape refractory layer 22 and the insulating layer 23 of special polymer material.

[0054] The material selection and thickness of the mica tape refractory layer 22, the special polymer material insulation layer 23, the aluminum foil mica paper layer 24, and the outer sheath layer 25 refer to the first embodiment.

Embodiment 3

[0056] Such as image 3 As shown, a high-performance flexible fire-resistant cable, the cable includes a conductor 3, the conductor 3 includes a copper conductor, tinned or not tinned, and the inner conductor 3 of the cable is not less than 2 strands.

[0057]Each strand of conductor 3 is covered with mica tape refractory layer 31 and special polymer material insulation layer 32 in sequence from inside to outside, and then two strands of conductor 3 are set as a group and covered with isolation layer 33. There are no less than 2 strands in the cable. The conductors 3 can be divided into no less than 2 groups. In this embodiment, 5 groups are used, and then the aluminum foil mica paper layer 34 and the outer sheath layer 35 cover all the conductor groups outward in sequence;

[0058] The material of the isolation layer 33 includes aluminum foil mica paper.

[0059] The material selection and thickness of mica tape refractory layer 31 , special polymer material insulation layer...

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Abstract

The invention discloses a high-performance flexible fire-resistant cable, which comprises a conductor, wherein the conductor is sequentially coated with a mica tape refractory layer, a special polymer material insulating layer, an aluminum foil mica paper layer and an outer sheath layer from inside to outside. The high-performance flexible fire-resistant cable has the advantages that a low-smoke halogen-free sheath material is taken as the outer sheath layer, aluminum foil mica paper is taken as a first refractory layer, the special polymer material insulating layer with the flame retardant property is taken as a second refractory layer and a mica tape is taken as a third fireproof layer, so that the fire resistance of the cable is greatly improved due to presence of protection of the three refractory layers; the condition that the cable can tolerate 950 DEG C for 3 hours is ensured; the high-performance flexible fire-resistant cable has spraying and vibrating fire-resistant conditions; the production process condition is simple and easy to control; and the produced cable is a flexible cable and a special device or process is not needed for laying and installation.

Description

technical field [0001] The invention relates to a high-performance flexible fire-resistant cable. Background technique [0002] Fire-resistant cables refer to wires and cables that can still maintain normal operation for a certain period of time during the burning process in the event of a fire accident. With the development of society, people's safety awareness is constantly improving, and the application of fire-resistant cables is becoming more and more extensive. At present, fire-resistant cables are widely used in high-rise buildings, subways, power plants, nuclear power plants, coal mines and various public places to ensure the greatest protection of people's lives and property in case of fire. [0003] The current fire-resistant cable standards include the following standards: [0004] a. Burn for 90 minutes at a flame temperature of 750°C, and the circuit will not be short-circuited and broken down; [0005] b. Burn for 90 minutes at a low flame temperature of 950...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/29H01B7/17
CPCH01B7/29H01B7/17
Inventor 梁启荣
Owner 龙川秀康威达新型材料有限公司
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