CN214671977U - High-temperature-resistant high-strength flame-retardant signal transmission cable - Google Patents

Abstract

The utility model relates to a high temperature resistant high strength flame retardant signal transmission cable, wherein four groups of signal line units, five glass fiber filler cores and a ground wire are twisted, and a glass cloth inner protective layer, a silver-plated copper alloy shielding layer and a glass fiber sheath are sequentially arranged outside the signal line units; the signal wire unit is formed by wrapping a layer of microporous polytetrafluoroethylene film insulating layer outside a silver-plated copper alloy conductor I to form signal single wires, the two signal single wires and two microporous polytetrafluoroethylene film core-filling twisted, and a polyimide/silver composite film layer and a silver-copper alloy shielding layer are sequentially arranged outside the signal single wires. The utility model has the advantages that: the temperature-resistant grade of the cable is improved, the strength of the cable is improved, the flame retardant property of the cable is improved, and the attenuation is obviously reduced, so that the effective transmission of signals is ensured.

Description

High-temperature-resistant high-strength flame-retardant signal transmission cable

Technical Field

The utility model relates to a fire-retardant signal transmission cable of high temperature resistant high strength is applied to the inside signal transmission of relevant equipment in aerospace field, is a signal transmission cable that high temperature resistant, high strength, flame retardant property are good, transmission performance is superior.

Background

In the traditional signal transmission cable in the current market, common fluoroplastic is adopted for insulation, the dielectric constant is large, and the generated attenuation is large; the shielding adopts a metal wire braided structure, so that the shielding efficiency is low, and the external signal interference cannot be effectively prevented. The two points result in great attenuation of the signal during transmission, so that the signal cannot be transmitted efficiently and with high quality.

The traditional signal transmission cable is made of materials with low strength, the performance of the traditional signal transmission cable can meet the use requirements during static work, but the traditional signal transmission cable is not suitable for dynamic conditions with bending and pulling requirements, because the cable is bent and pulled, the overall strength is low, the internal insulation is easy to deform, the transmission performance of the product is affected, and meanwhile, the conductor is easy to break, so that the cable cannot be normally used due to failure.

According to the traditional signal transmission cable, a sheath is generally made of a fluorinated ethylene propylene material, the maximum working temperature of the material is 200 ℃, the flame retardant property is poor, and certain occasions with wide use temperature range and flame retardant property requirements cannot be met.

Disclosure of Invention

In view of the defects existing in the prior art, the utility model provides a high temperature resistant high strength

The flame-retardant signal transmission cable improves the temperature-resistant grade of the cable, improves the strength of the cable, improves the flame-retardant performance of the cable, and obviously reduces attenuation so as to ensure effective transmission of signals.

The utility model discloses a realize above-mentioned purpose, the technical scheme who adopts is: a high-temperature-resistant high-strength flame-retardant signal transmission cable comprises a signal line unit, a glass fiber filler, a ground wire, a glass cloth inner protective layer, a silver-plated copper alloy shielding layer and a glass fiber sheath;

the four groups of signal wire units, the five glass fiber filler cores and the ground wire are twisted, and a glass cloth inner protective layer, a silver-plated copper alloy shielding layer and a glass fiber protective sleeve are sequentially arranged outside the signal wire units;

the signal line unit is formed by wrapping a layer of microporous polytetrafluoroethylene film insulating layer outside a silver-plated copper alloy conductor I to form signal single lines, the two signal single lines and two microporous polytetrafluoroethylene film core-filling twisted, and a polyimide/silver composite film layer and a silver-copper alloy shielding layer are sequentially arranged outside the signal single lines.

The utility model has the advantages that:

the signal wire unit of the utility model is insulated and filled with microporous polytetrafluoroethylene films,

compared with the common fluoroplastic, the combined dielectric constant is reduced by about 30 percent, so that the attenuation value of the signal is reduced by about 15 percent, and the transmission efficiency of the signal is greatly improved; the signal line unit shielding adopts around covering polyimide/silver composite film and weaving silver-copper alloy silk double-shielded structure, possesses better shielding effect than traditional individual layer shielding structure, can effectively avoid external signal to disturb to guarantee the high-efficient transmission of signal.

The conductors and the shields of the utility model are made of silver-plated copper alloy materials, the strength of the materials is improved by about 80 percent compared with the strength of the common silver-plated copper wires, and the materials can bear larger external tension; the utility model discloses five glass fiber of inside packing fill the core, not only make the product structure more round, still promoted cable bulk strength by a wide margin. The use of the silver-plated copper alloy and the glass fiber improves the overall strength of the cable by about 50 percent, and ensures that signals can still be effectively transmitted and the cable can still work normally when the cable is subjected to large external tension.

The utility model discloses glass cloth is used to the inner sheath, and the sheath uses the glass silk, and glass material has advantages such as the heat resistance is high, moisture absorption is little, tensile strength is high, fire behaviour is good, compares with traditional fluoroplastics sheath, has effectively improved the fire behaviour of cable to promote the highest operating temperature of cable to 450 ℃ by 250 ℃, expanded the application range of cable greatly, guaranteed that the cable is normal use under the occasion that has special requirements such as high temperature resistant, fire-retardant, anticorrosion.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural diagram of the signal line unit of the present invention.

Detailed Description

As shown in fig. 1 and 2, the high-temperature-resistant high-strength flame-retardant signal transmission cable comprises a signal line unit 1, a glass fiber filler 2, a ground line 3, a glass cloth inner protective layer 4, a silver-plated copper alloy shielding layer 5 and a glass fiber sheath 6.

The signal wire unit 1 is formed by wrapping a layer of microporous polytetrafluoroethylene film insulating layer 1-3 outside a silver-plated copper alloy conductor I1-2 to form signal single wires, twisting the two signal single wires and two microporous polytetrafluoroethylene film core fillers 1-1, and sequentially arranging a polyimide/silver composite film layer 1-4 and a silver-copper alloy shielding layer 1-5 outside the signal single wires.

Four groups of signal line units 1, five glass fiber filler cores 2 and a ground wire 3 are twisted, and a glass cloth inner protective layer 4, a silver-plated copper alloy shielding layer 5 and a glass fiber sheath 6 are sequentially arranged outside the signal line units.

The specific arrangement structure of the signal line units 1, the glass fiber filler cores 2 and the ground wires 3 is that four groups of signal line units 1 are arranged in a rectangular shape, one glass fiber filler core 2 is arranged at the center of each group of signal line units 1, one glass fiber filler core 2 is respectively arranged between every two adjacent groups of signal line units 1, and one ground wire 3 is arranged between any two groups of signal line units 1.

Claims (2)

1. The utility model provides a fire-retardant signal transmission cable of high temperature resistant high strength which characterized in that: the ground wire comprises a signal wire unit (1), a glass fiber filler (2), a ground wire (3), a glass cloth inner protective layer (4), a silver-plated copper alloy shielding layer (5) and a glass fiber sheath (6);

the four groups of signal wire units (1), the five glass fiber filler cores (2) and the ground wire (3) are twisted, and a glass cloth inner protective layer (4), a silver-plated copper alloy shielding layer (5) and a glass fiber sheath (6) are sequentially arranged outside the signal wire units;

the signal line unit (1) is formed by wrapping a microporous polytetrafluoroethylene film insulating layer (1-3) outside a silver-plated copper alloy conductor I (1-2) to form signal single lines, the two signal single lines and two microporous polytetrafluoroethylene film filling cores (1-1) are twisted, and a polyimide/silver composite film layer (1-4) and a silver-copper alloy shielding layer (1-5) are sequentially arranged outside the signal single lines.

2. The high temperature resistant, high strength, and flame retardant signal transmission cable of claim 1, wherein: the specific arrangement structure of the signal wire unit (1), the glass fiber filler core (2) and the ground wire (3) is as follows,

four groups of signal line units (1) are arranged in a rectangular mode, a glass fiber filling core (2) is arranged in the center of each group of signal line units (1), a glass fiber filling core (2) is arranged between every two adjacent groups of signal line units (1), and a ground wire (3) is arranged between any two groups of signal line units (1).

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