High-strength electromagnetic shielding cable

An electromagnetic shielding and high-strength technology, applied in the direction of insulated cables, cables, circuits, etc., can solve the problems of communication signal information error and distortion, etc., to increase tensile and compressive performance, best electromagnetic shielding performance, and improve strength Effect

Active Publication Date: 2020-01-07
JIANGSU HENGTONG WIRE & CABLE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the safe operation of rail transit trains, how to ensure the safe and stable transmission of rail transit communication signals has always been an important task that the industry has paid close attention to for a long time. In the previous applications of similar products in the industry, there were some special sections with harsh electromagnetic field environments. In

Method used

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  • High-strength electromagnetic shielding cable
  • High-strength electromagnetic shielding cable
  • High-strength electromagnetic shielding cable

Examples

Experimental program
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Effect test

Embodiment 1

[0034] see figure 1 , this embodiment discloses a high-strength electromagnetic shielding cable, including a cable core and a refractory layer, an isolation layer, a shielding layer, and a flame-retardant sheath layer that are sequentially coated on the outside of the cable core; the cable core includes a The copper conductor is formed by twisting a plurality of copper wires. The fire-resistant layer is a fire-resistant tape, and the fire-resistant tape is ceramic fiber cloth wrapped around the outside of the wire core, with a thickness of 100-200 μm.

[0035] The isolation layer is a polyurethane / glass fiber / expandable graphite ternary composite foam layer with a thickness of 200-400 μm; the preparation method is as follows:

[0036] (1) Take by weighing two parts of coupling agent KH550 according to 2wt% and 5wt% of glass fiber and expandable graphite, and dissolve them in absolute ethanol respectively to obtain two parts of coupling agent solutions with a concentration of ...

Embodiment 2

[0042] see figure 2 , this embodiment discloses a high-strength electromagnetic shielding cable, including a cable core and a refractory layer, an isolation layer, a shielding layer, and a flame-retardant sheath layer that are sequentially coated on the outside of the cable core; the cable core includes 4 A copper conductor and a cross-shaped filling frame, wherein the copper conductor is formed by twisting a plurality of copper wires, and is separated and relatively fixed by the cross-shaped filling frame. The fire-resistant layer is a fire-resistant tape, and the fire-resistant tape is a ceramic polyimide tape wrapped around the outside of the cable core, with a thickness of 100-200 μm.

[0043] The isolation layer is a polyurethane / glass fiber / expandable graphite ternary composite foam layer with a thickness of 200-400 μm; the preparation method is as follows:

[0044] (1) Take by weighing two parts of coupling agent KH550 according to 2wt% and 5wt% of glass fiber and exp...

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Abstract

The invention discloses a high-strength electromagnetic shielding cable. The cable comprises a cable core, and a fireproof layer, an isolation layer, a shielding layer and a flame-retardant sheath layer which sequentially cover an outer side of the cable core, wherein the cable core comprises a plurality of copper conductors, each copper conductor is formed by twisting a plurality of copper wires,the fireproof layer is a fireproof wrapping tape wrapping an outer side of the cable core, the isolation layer is a polyurethane/glass fiber/expandable graphite ternary composite foaming layer with the thickness of 200-400 [mu] m, the shielding layer comprises an inner shielding layer and an outer shielding layer, the inner shielding layer is a PVDF/nickel powder composite coating, the outer shielding layer is an aramid fiber/carbon fiber composite braided layer, and metal shielding materials are plated on surfaces of aramid fiber and carbon fiber, and the flame-retardant sheath layer is a low-smoke halogen-free outer sheath. The cable is advantaged in that the cable is high in tensile strength and compressive strength, has very strong electromagnetic shielding performance, can not be influenced in the high-temperature environment, particularly in a fire disaster, and cannot become a flame-assisting material, so stable transmission of railway signals is guaranteed.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to a high-strength electromagnetic shielding cable. Background technique [0002] As an important means to realize train command and train operation management, rail transit communication signal cables have become indispensable key equipment to ensure train safety and improve transportation efficiency. In the safe operation of rail transit trains, how to ensure the safe and stable transmission of rail transit communication signals has always been an important task that the industry has paid close attention to for a long time. In the previous applications of similar products in the industry, there were some special sections with harsh electromagnetic field environments. In the case of bit errors and distortions, especially when the train enters or leaves the section, this unfavorable situation is more serious. In order to effectively improve the quality of information transmission, a ...

Claims

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Application Information

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IPC IPC(8): H01B5/08H01B7/17H01B7/29H01B7/295H01B7/18H01B7/28
CPCH01B5/08H01B7/17H01B7/18H01B7/28H01B7/29H01B7/295
Inventor 吴士杰宋志斌徐勤锋席娇娜张波
Owner JIANGSU HENGTONG WIRE & CABLE TECH
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