CN114360789A - Self-supporting anti-interference multi-core shielding communication cable - Google Patents

Abstract

The invention discloses a self-supporting anti-interference multi-core shielding communication cable which comprises multi-core communication cable cores and bearing stranded wires which are arranged at intervals and are jointly coated in a polyvinyl chloride extruded outer sheath layer, wherein a thin connecting rib is formed on a spacing section between the multi-core communication cable cores and the bearing stranded wires on the polyvinyl chloride extruded outer sheath layer, the bearing stranded wires are formed by twisting stainless steel wires and aramid stranded wires, the thickness of the thin connecting rib is not less than one half of the diameter of the bearing stranded wires, the multi-core communication cable cores comprise a plurality of insulating cable cores and nylon resin core materials which are jointly twisted to form a cable core, and an AFRP reinforced wrapping layer, a fluororesin wrapping anti-abrasion layer, a shielding mesh conductor layer, a copper-plastic composite tape wrapping shielding layer, a nylon wire anti-torsion wrapping layer and a nylon anti-corrosion layer are sequentially coated outside the cable core. The cable has better self bearing capacity, excellent torsion resistance, stable shielding effect and durable use.

Description

Self-supporting anti-interference multi-core shielding communication cable

Technical Field

The invention relates to the technical field of cables, in particular to a self-supporting anti-interference multi-core shielding communication cable.

Background

The communication cable is widely used in the construction of a metropolitan area network communication network, the self-supporting multi-core communication cable is mainly installed in an overhead mode, the suspension wire and the cable use the same outer protective layer, and the self-supporting multi-core communication cable is economical, practical and convenient to install and lay. Due to the complexity of the overhead installation working condition environment, the cable is easy to suffer from external signal interference, the cable shielding effect is unstable, and the signal transmission characteristic is influenced. In addition, the cable has poor self bearing capacity and insufficient torsion resistance, the core breaking and the shielding layer breaking are easy to happen in the installation process, and the electrical characteristics of normal work are influenced.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the self-supporting anti-interference multi-core shielding communication cable which has the advantages of better self-bearing capacity, excellent torsion resistance, stable shielding effect and durable use.

The invention solves the technical problems through the following technical scheme.

The self-supporting anti-interference multi-core shielding communication cable comprises multi-core communication wire cores and a bearing stranded wire which are arranged at intervals and are jointly coated in a polyvinyl chloride extruded outer sheath layer, the polyvinyl chloride extruded outer sheath layer is provided with a thin connecting rib on the interval section between the multi-core communication wire core and the bearing stranded wire, the bearing stranded wire is formed by twisting stainless steel wires and aramid stranded wires, the thickness of the thin connecting rib is not less than one half of the diameter of the bearing stranded wire, the multi-core communication wire core comprises a plurality of insulated wire cores and a nylon resin core material which are twisted together to form a cable core, the cable core is sequentially coated with an AFRP reinforced wrapping layer, a fluororesin wrapping anti-abrasion layer, a shielding mesh conductor layer, a copper-plastic composite tape wrapping shielding layer, a nylon wire anti-torsion wrapping layer and a nylon anti-corrosion layer outside the cable core, the insulating wire core comprises an inner conductor and an XLPE insulating layer, and insulating lubricating silicone grease is filled between the inner conductor and the XLPE insulating layer.

Preferably, the inner conductor is formed by co-twisting a plurality of tin-plated copper monofilaments and a plurality of para-type wholly aromatic copolyamide drawn fibers, and the diameter of each tin-plated copper monofilament is 0.02mm to 0.04 mm.

Preferably, the thickness of the thin connecting rib is not more than four fifths of the diameter of the bearing stranded wire.

Preferably, the aramid stranded wire is formed by twisting a plurality of aramid fibers and integrally bonding the aramid fibers and thermoplastic polypropylene resin in a hot melting manner.

Preferably, the AFRP reinforced wrapping layer is of a plurality of aramid stranded wire unidirectional spiral wrapping structures, and the wrapping direction is opposite to the twisting direction of the insulated wire cores.

Preferably, the fluororesin lapping and wear-reducing layer is a fluororesin lapping structure with a unidirectional spiral lapping cover.

Preferably, the shielding mesh conductor layer is formed by mixing two tinned copper wires with different wire diameters and a wire diameter ratio of 0.9-1, wherein the tinned copper wires are reversely and spirally wound, the wire diameter of each tinned copper wire is 0.12-0.18 mm, and the shielding density is 85-95%.

Preferably, the nylon wire anti-twisting wrapping layer is of a structure that inner and outer double-layer nylon strands are spirally wound and braided in opposite directions, and the winding distances are different.

Preferably, the inner surface of the nylon anticorrosive layer is provided with a thermoplastic polyurethane adhesive layer.

Preferably, the lay length of the cable core is 15 to 30 times of the outer diameter of the insulated wire core.

The invention has the beneficial effects that:

1. the bearing stranded wire is formed by twisting the stainless steel wire and the aramid stranded wire, so that the flexibility is improved, the tensile strength is high, the bearing capacity of the cable is greatly improved, the difficulty of an overhead installation process is reduced, and the cable is durable in use.

2. Through the antitorque complex area of copper moulding around the covering of nylon wire closely fix outside shielding mesh conductor layer around the covering shielding layer, prevent that shielding mesh conductor layer structure is loose, help reducing shielding mesh conductor layer local stress concentration, improve antitorque commentaries on classics nature, avoid appearing the shielding layer problem of breaking wire, guarantee the stability of shielding effect. In addition, an integrated bonding structure is formed by the thermoplastic polyurethane bonding layer, so that the anti-torsion performance of the multi-core communication wire core is improved, and the tensile strength of the cable is improved.

3. Through shielding netted conductor layer, the compound area of copper plastics around the package shielding layer forms shielding conductor jointly, the compound area of copper plastics is woven around the effectual clearance of filling shielding netted conductor layer of package shielding layer and is formed, effectual reduction signal attenuation volume, reinforcing shielding performance improves the interference killing feature, and the special winding of shielding netted conductor layer is woven the structure and is helped improving pliability and resistant bending characteristic, prevents the shielding layer broken string, guarantees stable shielding characteristic.

Drawings

Fig. 1 is a schematic cross-sectional structure diagram according to an embodiment of the present invention.

In the figure: 1-a multi-core communication wire core, 2-a bearing stranded wire, 3-a polyvinyl chloride extruded outer sheath layer, 4-a thin connecting rib, 5-an insulating wire core, 6-a nylon resin core material, 7-an AFRP reinforced wrapping layer, 8-a fluororesin wrapping anti-abrasion layer, 9-a shielding mesh conductor layer, 10-a copper-plastic composite tape wrapping shielding layer, 11-a nylon wire anti-torsion wrapping layer, 12-a nylon anti-corrosion layer, 13-an inner conductor and 14-an XLPE insulating layer.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

As shown in fig. 1, the self-supporting anti-interference multi-core shielded communication cable according to the embodiment of the present invention includes multi-core communication cores 1 and supporting strands 2 arranged at intervals, and the multi-core communication cores and the supporting strands 2 are collectively coated in a polyvinyl chloride extruded outer sheath layer 3, and a thin connecting rib 4 is formed on a spacing section between the multi-core communication cores 1 and the supporting strands 2 in the polyvinyl chloride extruded outer sheath layer 3. The bearing stranded wire 2 is formed by twisting a stainless steel wire and an aramid stranded wire, and specifically, the aramid stranded wire is formed by twisting a plurality of aramid fibers and is integrated with thermoplastic polypropylene resin through hot melting and bonding. The thickness of the thin connecting rib 4 is not less than one half of the diameter of the bearing stranded wire 2, and further, the thickness of the thin connecting rib 4 is not more than four fifths of the diameter of the bearing stranded wire 2.

The multi-core communication wire core 1 comprises a plurality of insulating wire cores 5 and a nylon resin core material 6 which are jointly twisted to form a cable core, and the lay length of the cable core is 15-30 times of the outer diameter of each insulating wire core 5. The insulated wire core 5 comprises an inner conductor 13 and an XLPE insulating layer 14, and an insulating lubricating silicone grease is filled between the inner conductor 13 and the XLPE insulating layer 14. Specifically, the inner conductor 13 is formed by co-twisting a plurality of tin-plated copper monofilaments and a plurality of para-type wholly aromatic copolyamide drawn fibers, and the diameter of each tin-plated copper monofilament is 0.02mm to 0.04 mm.

The cable core is coated with an AFRP reinforced wrapping layer 7, a fluororesin wrapping anti-abrasion layer 8, a shielding mesh conductor layer 9, a copper-plastic composite tape wrapping shielding layer 10, a nylon wire anti-torsion wrapping layer 11 and a nylon anticorrosive layer 12 in sequence, and further, a thermoplastic polyurethane bonding layer is arranged on the inner surface of the nylon anticorrosive layer 12. In one embodiment, the AFRP reinforced wrapping layer 7 is a unidirectional spiral wrapping structure of a plurality of aramid strands, and the wrapping direction is opposite to the twisting direction of the insulated wire core 5. In one embodiment, the fluororesin lapping and wear reducing layer 8 is a fluororesin tape unidirectional spiral lapping and lapping structure. In one embodiment, the shielding mesh conductor layer 9 is formed by mixing two tinned copper wires with different wire diameters and a wire diameter ratio of 0.9 to 1, and the tinned copper wires are reversely and spirally wound, wherein the wire diameter of the tinned copper wires is 0.12mm to 0.18mm, and the shielding density is 85% to 95%. In one embodiment, the nylon yarn anti-twisting wrapping layer 11 is formed by weaving inner and outer double-layer nylon strands in a reverse spiral winding structure with different winding pitches.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. Self-supporting anti-interference multicore shielding communication cable, characterized by: including interval arrangement's multicore communication sinle silk (1) and bear stranded conductor (2) and coat jointly in crowded package oversheath layer of polyvinyl chloride (3), crowded package oversheath layer of polyvinyl chloride (3) is in multicore communication sinle silk (1) with bear and be formed with slim splice bar (4) on the interval section between stranded conductor (2), bear stranded conductor (2) and form for stainless steel wire and aramid fiber strand wires transposition, slim splice bar (4) thickness is not less than bear the half of stranded conductor (2) diameter, multicore communication sinle silk (1) includes that a plurality of insulation core (5) and nylon resin core (6) twist jointly constitute the cable core, the cable core outside has AFRP in proper order to strengthen around covering (7), fluororesin around package antifriction layer (8), shielding mesh conductor layer (9), copper-plastic composite band around package shielding layer (10), nylon wire layer (11) and nylon anticorrosive coating (12), the insulated wire core (5) comprises an inner conductor (13) and an XLPE insulating layer (14), and insulating lubricating silicone grease is filled between the inner conductor (13) and the XLPE insulating layer (14).

2. The self-supporting interference-resistant multi-core shielded communication cable of claim 1, wherein: the inner conductor (13) is formed by jointly twisting a plurality of tinned copper monofilaments and a plurality of para-type wholly aromatic copolyamide drawn fibers, and the diameter of each tinned copper monofilament is 0.02mm to 0.04 mm.

3. The self-supporting interference-resistant multi-core shielded communication cable of claim 1, wherein: the thickness of the thin connecting rib (4) is not more than four fifths of the diameter of the bearing stranded wire (2).

4. The self-supporting interference-resistant multi-core shielded communication cable of claim 1, wherein: the aramid fiber stranded wire is formed by twisting a plurality of aramid fibers and bonding the aramid fibers and thermoplastic polypropylene resin into a whole in a hot melting way.

5. The self-supporting interference-resistant multi-core shielded communication cable of claim 1, wherein: the AFRP reinforced wrapping layer (7) is of a plurality of aramid strand unidirectional spiral wrapping structures, and the wrapping direction is opposite to the twisting direction of the insulated wire core (5).

6. The self-supporting interference-resistant multi-core shielded communication cable of claim 1, wherein: the fluororesin lapping and wear-reducing layer (8) is a fluororesin lapping structure with a unidirectional spiral lapping cover.

7. The self-supporting interference-resistant multi-core shielded communication cable of claim 1, wherein: the shielding mesh conductor layer (9) is formed by mixing two tinned copper wires with different wire diameters and a wire diameter ratio of 0.9-1, wherein the tinned copper wires are reversely spirally wound, the wire diameter of each tinned copper wire is 0.12-0.18 mm, and the shielding density is 85-95%.

8. The self-supporting interference-resistant multi-core shielded communication cable of claim 1, wherein: the nylon wire anti-torsion lapping layer (11) is of an inner and outer double-layer nylon strand wire which are in reverse spiral winding weaving structures and have different winding distances.

9. The self-supporting interference-resistant multi-core shielded communication cable of claim 1, wherein: the inner surface of the nylon anticorrosive layer (12) is provided with a thermoplastic polyurethane bonding layer.

10. The self-supporting interference-resistant multi-core shielded communication cable of claim 1, wherein: the cable core lay length is 15 to 30 times of the outer diameter of the insulated wire core (5).

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