CN215377030U - Stretch-proofing fire-retardant composite cable - Google Patents

Abstract

A stretch-proofing fire-retardant composite cable, it includes from inside to outside in proper order: two power wire cores and two signal wire cores; the magnesium oxide filling layer is filled in gaps of the four wire cores; the mica flame-retardant layer wraps the magnesium oxide filling layer and the four wire cores; an outer shielding layer which wraps the mica flame-retardant layer; the polyethylene sheath layer wraps the outer shielding layer; the armor layer wraps the polyethylene sheath layer; the power line core sequentially comprises a power guide core, a silica gel insulating layer, an inner shielding layer and a polyethylene sheath layer from inside to outside, and the signal line core comprises a signal guide core, a silica gel insulating layer, an inner shielding layer and a polyethylene sheath layer from inside to outside.

Description

Stretch-proofing fire-retardant composite cable

Technical Field

The utility model relates to a composite cable, in particular to a stretch-resistant flame-retardant composite cable.

Background

The composite cable is used for transmitting cables and electric signals, and is commonly used for urban underground power grids and building power supply trunks. The composite cable is used for transmitting and distributing cable products of high-power electric energy in a trunk line of a power system, the cable products comprise 1-500KV and above various voltage grades, and the working environment is severe, so the requirements on insulation and flame retardance of the cable are higher than those of a common cable, and interference can be generated on signal transmission in the process of high-power electric energy transmission. In view of the above-mentioned drawbacks, modifications to the prior art are needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a stretch-resistant flame-retardant composite cable which is high in stretch resistance, good in flame retardance and high in interference resistance.

A stretch-proofing fire-retardant composite cable, it includes from inside to outside in proper order: two power wire cores and two signal wire cores; the magnesium oxide filling layer is filled in gaps of the four wire cores; the mica flame-retardant layer wraps the magnesium oxide filling layer and the four wire cores; an outer shielding layer which wraps the mica flame-retardant layer; the polyethylene sheath layer wraps the outer shielding layer; the armor layer wraps the polyethylene sheath layer; the power line core sequentially comprises a power guide core, a silica gel insulating layer, an inner shielding layer and a polyethylene sheath layer from inside to outside, and the signal line core comprises a signal guide core, a silica gel insulating layer, an inner shielding layer and a polyethylene sheath layer from inside to outside.

Preferably, the outer shielding layer is an aluminum foil mylar tape.

Preferably, the inner shielding layer is a graphene semiconductive shielding layer.

Preferably, the silica gel insulating layer is formed by winding three layers of silica gel belts.

Preferably, the mica flame-retardant layer is formed by winding three layers of mica tapes.

Preferably, the polyethylene sheath layer is formed by extruding polyethylene.

Preferably, the wire core is formed by twisting seven copper cores, the seven copper cores are in a 1+6 arrangement structure, and the outer diameter ratio is 3.

The utility model provides a stretch-resistant flame-retardant composite cable which comprises a power wire core and a signal wire core and can simultaneously realize the transmission of electric energy and signals, wherein the flame retardant property of the composite cable is improved by a magnesium oxide filling layer and a mica flame retardant layer, the mica layer is formed by winding a mica tape, and a silica gel insulating layer is formed by winding a silica gel tape, so that the stretch-resistant capability of the whole cable is improved.

Drawings

Fig. 1 is a schematic structural view of a stretch-resistant flame-retardant composite cable according to a first embodiment of the present invention;

FIG. 2 is a schematic diagram of the structure of the power core of FIG. 1;

fig. 3 is a schematic structural diagram of the signal wire core in fig. 1.

Detailed Description

The embodiments described below are only some of the novel embodiments used herein, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, a stretch-resistant flame-retardant composite cable provided in a first embodiment of the present invention includes two power cores 1 and two signal cores 2; a magnesium oxide filling layer 3 filled in the gaps of the four wire cores; a mica flame-retardant layer 4 wrapping the magnesium oxide filling layer 3 and the four wire cores; an outer shielding layer 5 wrapping the mica flame-retardant layer 4; a polyethylene sheath layer 6 wrapping the outer shielding layer 5; and the armor layer 7 wraps the polyethylene sheath layer 6.

With reference to fig. 2, the power line core 1 sequentially includes, from inside to outside, a power conducting core 11, a silica gel insulating layer 12, an inner shielding layer 13, and a polyethylene sheath layer 14; referring to fig. 3, the signal wire core 2 includes a signal guide core 21, a silica gel insulating layer 22, an inner shielding layer 23, and a polyethylene sheath layer 24 from inside to outside.

The stretch-resistant flame-retardant composite cable provided by the utility model comprises the outer shielding layer 5 and the inner shielding layer 23, has better shielding performance, and prevents signal transmission from being interfered and simultaneously prevents the cable from sending interference signals.

In this embodiment, the silica gel insulating layer is formed by winding three silica gel belt layers, so that the central conductor 3 is more round and more round under the insulating condition, thereby improving the power transmission stability and the stretch resistance; the mica flame-retardant layer is formed by winding three mica tape layers, the mica tapes can resist the high temperature of 600-650 ℃, and the winding structure of the three mica tapes can improve the tensile resistance of the cable; the polyethylene sheath layer 1 is formed by extruding polyethylene, and the material cost is moderate; the power cable core is formed by twisting seven copper cores in a 1+6 arrangement structure, the outer diameter ratio is 3, and the arrangement combination structure improves the power transmission stability of the cable.

The stretch-resistant flame-retardant composite cable provided by the utility model has the advantages of high stretch-resistant capability, good flame-retardant property, good shielding property and moderate cost, and can adapt to severe use environment of the composite cable.

The above disclosure is only one preferred embodiment of the present invention, which should not be construed as limiting the scope of the present invention, and therefore all equivalent variations made within the scope of the present invention are included in the present invention.

Claims (7)

1. The utility model provides a stretch-proofing fire-retardant composite cable which characterized in that, it includes by interior and outside in proper order:

two power wire cores and two signal wire cores;

the magnesium oxide filling layer is filled in gaps of the four wire cores;

the mica flame-retardant layer wraps the magnesium oxide filling layer and the four wire cores;

an outer shielding layer which wraps the mica flame-retardant layer;

the polyethylene sheath layer wraps the outer shielding layer;

the armor layer wraps the polyethylene sheath layer;

the power line core sequentially comprises a power guide core, a silica gel insulating layer, an inner shielding layer and a polyethylene sheath layer from inside to outside, and the signal line core comprises a signal guide core, a silica gel insulating layer, an inner shielding layer and a polyethylene sheath layer from inside to outside.

2. The stretch-resistant flame-retardant composite cable of claim 1, wherein the outer shielding layer is an aluminum foil mylar tape.

3. The stretch-resistant flame-retardant composite cable of claim 1, wherein the inner shield layer is a graphene semiconductive shield layer.

4. The stretch-resistant flame-retardant composite cable of claim 1, wherein the silicone insulation layer is wound from three layers of silicone tape.

5. The stretch resistant flame retardant composite cable of claim 1, wherein the mica flame retardant layer is wound of three layers of mica tape.

6. The stretch-resistant flame-retardant composite cable of claim 1, wherein the polyethylene jacket layer is extruded from polyethylene.

7. The stretch-resistant flame-retardant composite cable of claim 1, wherein the power wire core is formed by twisting seven copper cores, the seven copper cores are arranged in a 1+6 arrangement structure, and the outer diameter ratio is 3.

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