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Flexible fireproof cable and preparation method thereof

A fire-resistant cable, flexible technology, applied in the direction of cable/conductor manufacturing, insulated cables, bendable cables, etc., can solve the problems of not being able to produce in large lengths, affecting fire performance, and small application range, and achieve continuous large-length production and production Low cost, the effect of reducing production costs

Active Publication Date: 2017-02-15
河北盛安线缆有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, magnesium oxide fireproof cables have been widely used at home and abroad, but they are affected by many aspects such as manufacturing length and insulation performance, and their application range is small, and they cannot be produced in large lengths and cannot be bent; The cable not only solves the problem of low bending performance of the magnesium oxide fireproof cable, but the copper as the outer sheath is easily oxidized and affects the fireproof performance

Method used

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  • Flexible fireproof cable and preparation method thereof
  • Flexible fireproof cable and preparation method thereof
  • Flexible fireproof cable and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The preparation method of the flexible fireproof cable of embodiment 1 of the present invention, comprises the steps:

[0049] (1) Preparation of ceramic polyolefin outer sheath material,

[0050] 50 parts of EVA260, 50 parts of ethylene-zincene copolymer, 3 parts of EVA blend grafted with maleic anhydride, 20 parts of aluminum hydroxide, 30 parts of magnesium hydroxide, 0.2 parts of tetraerythritol ester, 3 parts of polyethylene wax and 2 parts of ultra-high molecular weight polysiloxane were added to an internal mixer and mixed for 15 minutes to 110°C to obtain a mixture A;

[0051] Add 300 parts of clay and 2 parts of simethicone 201 to the above mixture A, and banbury for 8 minutes to 145°C to obtain mixture B;

[0052]Add 60 parts of ceramic powder and 8.5 parts of EVA-based color masterbatch to the above mixture B, banbury for 30 minutes to 165°C, stop banbury, ceramicize the polyolefin outer sheath material, cool to room temperature, and set aside;

[0053] (2)...

Embodiment 2

[0059] The preparation method of the flexible fireproof cable of embodiment 2 of the present invention comprises the following steps:

[0060] (1) Preparation of ceramic polyolefin outer sheath material,

[0061] 30 parts of EVA260, 20 parts of ethylene-zincene copolymer, 1 part of EVA blend grafted with maleic anhydride, 10 parts of aluminum hydroxide, 10 parts of magnesium hydroxide, 0.1 part of tetraerythritol ester, polyethylene wax 1 1 part and 1 part of ultra-high molecular weight polysiloxane were added to an internal mixer and mixed for 10 minutes to 100 ° C to obtain a mixture A;

[0062] Add 200 parts of pottery clay and 1 part of simethicone 201 to the above mixture A, and banbury for 6 minutes to 135°C to obtain mixture B;

[0063] Add 20 parts of ceramic powder and 5 parts of EVA-based color masterbatch to the above mixture B, banbury for 15 minutes to 145°C, stop banbury, ceramize the polyolefin outer sheath material, cool to room temperature, and set aside;

...

Embodiment 3

[0070] The preparation method of the flexible fireproof cable of embodiment 3 of the present invention comprises the following steps:

[0071] (1) Preparation of ceramic polyolefin outer sheath material,

[0072] 70 parts of EVA260, 80 parts of ethylene-zincene copolymer, 8 parts of EVA blend grafted with maleic anhydride, 50 parts of aluminum hydroxide, 50 parts of magnesium hydroxide, 0.1 part of tetraerythritol ester, polyethylene wax 5 1 and 2 parts of ultra-high molecular weight polysiloxane were added to an internal mixer and mixed for 15 minutes to 120°C to obtain a mixture A;

[0073] Add 400 parts of pottery clay and 2 parts of simethicone 201 to the above mixture A, and banbury for 20 minutes to 155°C to obtain mixture B;

[0074] Add 120 parts of ceramic powder and 15 parts of EVA-based color masterbatch to the above mixture B, banbury for 40 minutes to 165°C, stop banburying, ceramize the polyolefin outer sheath material, cool to room temperature, and set aside; ...

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Abstract

The invention discloses a flexible fireproof cable and a preparation method thereof. The cable having a four-equal-core cable core comprises three conductor wire cores, ground wires, a cladding layer, an inner sheath, and a ceramic polyolefin outer sheath. A filling layer encircles the conductor wire cores and the ground wires; the cladding layer coats the periphery of the filling layer; the inner sheath coats the outside of the cladding layer; and the outer sheath coats the outside of the inner sheath. Conductors, insulating layers, high-temperature color-separation belts, and wrapping layers are arranged inside the conductor wire cores and the ground wires successively from inside to outside. In addition, the preparation method includes: a ceramic polyolefin outer sheath material is prepared; and then copper belt releasing, tension adjusting, belt feeding positioning, precise wasted edge cutting, longitudinal cladding and forming, longitudinal seaming and welding, eddy current type crack detection, cooling and lubrication, stretching and sizing, embossing, washing and drying, outer sheath extrusion, laser cable printing, and winding displacement are carried out, thereby obtaining a flexible fireproof cable. The cable has advantages of high flexibility and good high-temperature-resistant and explosion-proof performances; the cable can work for long time at a temperature of 250 DEG C and the hot temperature can reach up to 1600 DEG C.

Description

technical field [0001] The invention relates to the field of electric equipment and its manufacture, in particular to a flexible fireproof cable and its preparation method. Background technique [0002] In the prior art, the insulating materials of cables and wires are all organic polymer materials, which are easily carbonized under flame conditions and lose their insulating effect. Fireproof cables are key equipment for the entire power infrastructure and fire protection systems. If there is no good fireproof conductive system, the power transmission and transformation system will be paralyzed. How to play a normal power transmission function under flame conditions is a difficult problem for fireproof cables. [0003] At present, magnesium oxide fireproof cables have been widely used at home and abroad, but they are affected by many aspects such as manufacturing length and insulation performance, and their application range is small, and they cannot be produced in large le...

Claims

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Application Information

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IPC IPC(8): H01B7/02H01B7/04H01B7/17H01B7/28H01B7/29H01B7/36H01B13/00H01B13/26H01B3/44H01B3/46
CPCY02A30/14H01B7/02H01B3/441H01B3/465H01B7/04H01B7/17H01B7/2806H01B7/29H01B7/292H01B7/361H01B13/00H01B13/2613
Inventor 姚章清李国旺
Owner 河北盛安线缆有限公司
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