A composite gel fire-resistant cable and its preparation method

A composite gel and fire-resistant cable technology, which is applied in the direction of cable/conductor manufacturing, insulated cables, cables, etc., to achieve the effect of solving the inconvenience of installation, improving the inconvenience of laying, installation and transportation, and excellent mechanical properties

Active Publication Date: 2017-06-23
江苏迪鑫电器电缆有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Before the completion of the present invention, there was no fire-resistant cable product identical to the preparation method of the present invention, nor was there any preparation method of fire-resistant cable identical to the present invention, which was recorded in the literature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. The metal conductor is made of aluminum alloy or copper.

[0023] 2. Dissolve citric acid and basic magnesium carbonate in deionized water at a ratio of 2:1 at 20°C, and perform magnetic stirring for 1 hour. During the stirring process, keep the pH value of the solution at 4.0. Heat the solution to 50°C, evaporate and dehydrate under reduced pressure at this temperature to obtain a sol, add 5.8% by weight of alumina fibers with a length of 20 μm and a diameter of 0.4 μm, add 0.5% by weight, and have an average particle size of 22nm Nano MgF 2 Particles (i.e. nano MgF 2 powder or nano MgF 2 powder), electromagnetically stirred for 50 minutes to gradually gel the composite sol with alumina fibers as the skeleton.

[0024] 3. Use an extruder to extrude the composite wet gel onto the metal conductor at a temperature of 95°C and a pressure of 120Mpa, and make it pass through an aging treatment box at 45°C and filled with absolute ethanol at a temperature of 2-3 ℃, fil...

Embodiment 2

[0030] 1. The metal conductor is made of aluminum alloy or copper.

[0031] 2. Dissolve citric acid and basic magnesium carbonate in deionized water at a material ratio of 3:1 at 20°C, and perform magnetic stirring for 1 hour. During the stirring process, keep the pH value of the solution at 4.0. Heat the solution to 50°C, evaporate and dehydrate under reduced pressure at this temperature to obtain a sol, add 10.8% by weight of alumina fibers with a length of 25 μm and a diameter of 0.5 μm, add 1.0% by weight, and have an average particle size of 23nm Nano MgF 2 Particles (i.e. nano MgF 2 powder or nano MgF 2 powder), electromagnetically stirred for 50 minutes to gradually gel the composite sol with alumina fibers as the skeleton.

[0032] 3. Use an extruder to extrude the composite wet gel onto the metal conductor at a temperature of 105°C and a pressure of 120Mpa, and make it go through an aging treatment box at 45°C filled with absolute ethanol and a temperature of 2-3 ...

Embodiment 3

[0038] 1. The metal conductor is made of aluminum alloy or copper.

[0039] 2. Dissolve citric acid and basic magnesium carbonate in deionized water at a material ratio of 4:1 at 20°C, and perform magnetic stirring for 1 hour. During the stirring process, keep the pH value of the solution at 4.0. Heat the solution to 50°C, and evaporate and dehydrate under reduced pressure at this temperature to obtain a sol, add 15.2% by weight of alumina fibers with a length of 35 μm and a diameter of 0.7 μm, add 1.5% by weight, and have an average particle size of 25nm Nano MgF 2 Particles (i.e. nano MgF 2 powder or nano MgF 2 powder), electromagnetically stirred for 50 minutes to gradually gel the composite sol with alumina fibers as the skeleton.

[0040] 3. Using an extruder, extrude the composite wet gel onto the metal conductor at a temperature of 120°C and a pressure of 120Mpa, and make it go through an aging treatment box at 45°C filled with absolute ethanol and a temperature of 2...

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Abstract

The invention relates to a compound gel fire-resistant cable and a preparation method thereof. The compound gel fire-resistant cable provided by the embodiment of the invention comprises a metal conductor, a compound gel insulating fire-resistant layer and a low-smoke halogen-free sheath. Compared with the prior art, the manufacturing method provided by the embodiment of the invention comprises the steps of preparing composite gel by basic magnesium carbonate (4MgCO3.Mg(OH)2.5H2O), a citric acid (C6H8O7), deionized water, an aluminum oxide fiber, nano MgF2 and the like; coating an outer layer of the metal conductor with the composite gel to prepare a cable core and carrying out online ageing and drying treatment on the cable core; and coating the outmost layer with the low-smoke halogen-free sheath. Therefore, according to the fire-resistant cable provided by the embodiment of the invention, the fire resistance is significantly improved when the installation and laying convenience is greatly improved, and cable application is safer.

Description

technical field [0001] The invention belongs to the field of power transmission and distribution line equipment, and relates to a cable and a preparation method thereof, in particular to a composite gel fire-resistant cable and a preparation method thereof. Background technique [0002] With the development of economy and society, the fire resistance of cables has been paid more and more attention. The traditional magnesium oxide mineral cable has good fire resistance, but its laying and installation is extremely inconvenient, which restricts its application. How to prepare fire-resistant cables with excellent fire-resistant performance and convenient installation and laying is of great significance. [0003] Before the completion of the present invention, no fire-resistant cable products using the same preparation method as the present invention have been seen, nor have the same fire-resistant cable preparation methods as the present invention been recorded in the literatu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B7/29H01B13/24
CPCH01B7/29H01B13/24
Inventor 吴振江於国良沈刚范雷方
Owner 江苏迪鑫电器电缆有限公司
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