CN217086243U

CN217086243U - Shielding enhanced rat and ant prevention underground communication cable

Info

Publication number: CN217086243U
Application number: CN202220292968.6U
Authority: CN
Inventors: 徐季新; 黄桂领; 王洪超; 邱金波; 王超; 姚汪宁
Original assignee: Zhejiang Zetastone Special Cable Co ltd
Current assignee: Zhejiang Zetastone Special Cable Co ltd
Priority date: 2022-02-14
Filing date: 2022-02-14
Publication date: 2022-07-29
Anticipated expiration: 2032-02-14

Abstract

The utility model discloses a shielding enhanced rat-proof and termite-proof underground communication cable, which comprises a plurality of insulated wire cores and an iron powder polyethylene composite resin core material which are twisted together to form a cable core, wherein the outside of the cable core is sequentially coated with an iron powder polyethylene composite resin wrapping layer, a shielding reticular conductor layer and a copper-plastic composite tape wrapping shielding layer, silane grafting crosslinked high density polyethylene inner sheath, stainless steel wire armor, nylon anticorrosive coating and silane grafting crosslinked high density polyethylene oversheath, iron powder polyethylene composite resin takes up the lid for the one-way spiral of iron powder polyethylene composite resin around the covering and winds the package structure, shielding netted conductive layer is that polyester fiber copper foil silk and tinned copper wire are each other for reverse spiral winding weave to constitute, the composite band is moulded to the copper and is taken the lid around the package structure for the one-way spiral of composite band is moulded to the copper around the package shielding layer, the stainless steel wire armor is that stainless steel wire and aramid fiber stranded conductor mix the winding to weave to constitute. The cable can effectively prevent mice from biting, has better anti-interference capability, stable shielding performance and durable use.

Description

Shielding enhanced rat and ant prevention underground communication cable

Technical Field

The utility model relates to the technical field of cables, especially, relate to a shielding enhancement mode protection against rodents ant underground communication cable.

Background

The multi-core communication cable is widely used in a complex environment for constructing a metropolitan area network communication network, is directly buried underground, and has the advantages that the mechanical property and the electrical property of the cable are kept unchanged under the working environment temperature of-30 ℃ to 60 ℃ in the aspect of use conditions, and the laying environment temperature of the cable is generally not lower than-5 ℃. The underground environment is complex, the cable is easy to be bitten by mice and the like, and is easy to be interfered by external signals when being mixed with other directly buried cables for laying, the cable shielding effect is unstable, and the signal transmission characteristic is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art not enough, the technical problem that solve provides a shielding enhancement mode protection against rodents ant underground communication cable, can effectually prevent that the mouse from stinging and nibbling, improves the fail safe nature of cable, and the interference killing feature is better, and shielding performance is stable, durable use.

The utility model discloses a make above-mentioned technical problem solve through following technical scheme.

The shielding enhanced rat-proof and termite-proof underground communication cable comprises a plurality of insulating wire cores and an iron powder polyethylene composite resin core material which are jointly twisted to form a cable core, wherein the cable core is sequentially coated with an iron powder polyethylene composite resin wrapping layer, a shielding mesh conductor layer, a copper-plastic composite tape wrapping shielding layer, a silane grafted crosslinked high-density polyethylene inner sheath, a stainless steel wire armor layer, a nylon anticorrosive layer and a silane grafted crosslinked high-density polyethylene outer sheath, the insulating wire core comprises an inner conductor and a silane grafted crosslinked low-density polyethylene insulating layer, insulating lubricating silicone grease is filled between the inner conductor and the silane grafted crosslinked low-density polyethylene insulating layer, the iron powder polyethylene composite resin wrapping layer is of an iron powder polyethylene composite resin one-way spiral lapping cover structure, and the shielding mesh conductor layer is formed by reversely spirally lapping and weaving a polyester fiber copper foil wire and a tinned copper wire, the polyester fiber copper foil wire diameter with tin-plated copper wire diameter is different and the line diameter ratio is between 0.9 to 1, the copper-plastic composite tape is a copper-plastic composite tape unidirectional spiral lapping and covering wrapping structure around the wrapping shielding layer, the stainless steel wire armor layer is formed by weaving stainless steel wires and aramid fiber strands in a mixed winding mode, and the aramid fiber strand wire diameter is not more than 85% of the stainless steel wire diameter.

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

Preferably, the inner conductor is formed by concentrically twisting a plurality of tinned copper monofilaments with the diameters of 0.01mm to 0.04mm, and the twisting direction of the tinned copper monofilaments is opposite to that of the insulated wire cores.

Preferably, the winding direction of the iron powder polyethylene composite resin wrapping layer is opposite to the twisting direction of the insulated wire core.

Preferably, the thickness of the copper-plastic composite tape wrapping shielding layer is one fifth to one tenth of that of the shielding mesh conductor layer.

Preferably, the copper-plastic composite belt comprises a copper foil layer and a PET (polyethylene terephthalate) film layer, the thickness of the copper foil layer is 8-25 μm, and the thickness of the PET film layer is not less than 5 times of that of the copper foil layer.

Preferably, the winding distance of the copper-plastic composite tape wrapping shielding layer is 3mm to 8 mm.

Preferably, the thickness of the inner sheath of the silane grafted and crosslinked high density polyethylene is 0.5mm to 1.2 mm.

Preferably, the thickness of the outer sheath of the silane grafted and crosslinked high-density polyethylene is not more than 8 mm.

Preferably, the inner surface of the silane grafted cross-linked high-density polyethylene outer sheath is provided with a thermoplastic EVA bonding layer.

The utility model has the advantages that:

1. the silane grafted crosslinked high-density polyethylene outer sheath and the nylon anticorrosive layer form an integrated bonding structure through the thermoplastic EVA bonding layer, the interlayer peeling phenomenon is not easy to occur, the nylon anticorrosive layer is high in hardness and effectively prevents mice from biting together with the stainless steel wire armor layer, the silane grafted crosslinked high-density polyethylene inner and outer sheaths have better flexibility, electrical insulation and water resistance, the silane grafted crosslinked high-density polyethylene inner and outer sheaths are strong in low-temperature working condition environment adaptation capacity, not prone to cracking and damage and better in durability.

2. Through iron powder polyethylene composite resin around the covering, shielding netted conductive layer, the compound area of copper moulding forms shielding conductor around the covering shielding layer jointly, the copper foil layer can effectually fill the space that shielding netted conductive layer woven and formed, effectual reduction signal attenuation, reinforcing shielding performance, improve the interference killing feature, polyester fiber copper foil silk diameter and tinned copper wire diameter are different and help improving the pliability and the resistant bending property of cable, it is strong to adapt to the environment of laying ability, the difficult disconnected silk broken string problem that appears, guarantee stable electrical characteristics.

3. The stainless steel wire armor layer is formed by weaving stainless steel wires and aramid stranded wires in a mixed winding mode, the flexibility of the armor layer is improved, the overall tensile strength of a cable is improved, stress concentration is reduced, the torque force during bending is reduced, the stainless steel wire armor layer is more suitable for a direct-buried underground laying environment, and the laying process difficulty is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

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

Reference numerals: 1-an insulating wire core, 11-an inner conductor, 12-a silane grafted crosslinked low-density polyethylene insulating layer, 2-an iron powder polyethylene composite resin core material, 3-an iron powder polyethylene composite resin lapping layer, 4-a shielding mesh conductor layer, 5-a copper plastic composite tape lapping shielding layer, 6-a silane grafted crosslinked high-density polyethylene inner sheath, 7-a stainless steel wire armor layer, 8-a nylon anticorrosive layer and 9-a silane grafted crosslinked high-density polyethylene outer sheath.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

As shown in figure 1, the utility model discloses shielding enhancement mode protection against rodents ant underground communication cable, constitute the cable core including a plurality of insulation core 1 and iron powder polyethylene composite resin core 2 transposition jointly. And the lay length of the cable core is 15 to 30 times of the outer diameter of the insulated wire core. The insulated wire core 1 comprises an inner conductor 11 and a silane grafted and crosslinked low-density polyethylene insulating layer 12, and insulating lubricating silicone grease is filled between the inner conductor 11 and the silane grafted and crosslinked low-density polyethylene insulating layer 12. Specifically, the inner conductor 11 is formed by concentrically twisting a plurality of tinned copper monofilaments with the diameters of 0.01mm to 0.04mm, and the twisting direction of the tinned copper monofilaments is opposite to that of the insulated wire core 1.

The cable core is sequentially coated with an iron powder polyethylene composite resin wrapping layer 3, a shielding mesh conductor layer 4, a copper-plastic composite tape wrapping shielding layer 5, a silane grafted crosslinked high-density polyethylene inner sheath 6, a stainless steel wire armor layer 7, a nylon anticorrosive layer 8 and a silane grafted crosslinked high-density polyethylene outer sheath 9, and further, a thermoplastic EVA (ethylene vinyl acetate) bonding layer is arranged on the inner surface of the silane grafted crosslinked high-density polyethylene outer sheath 9. The iron powder polyethylene composite resin wrapping layer 3 is of an iron powder polyethylene composite resin one-way spiral lapping cover wrapping structure, and further, the iron powder polyethylene composite resin wrapping layer 3 is opposite to the twisting direction of the insulated wire core 1. The shielding mesh conductor layer 4 is formed by weaving polyester fiber copper foil wires and tinned copper wires in a reverse spiral winding mode, the wire diameters of the polyester fiber copper foil wires and the tinned copper wires are different, and the wire diameter ratio is between 0.9 and 1. The copper-plastic composite tape lapping and shielding layer 5 is a copper-plastic composite tape unidirectional spiral lapping and covering lapping structure, further, the thickness of the copper-plastic composite tape lapping and shielding layer 5 is one fifth to one tenth of the thickness of the shielding mesh conductor layer 4, and further, the winding distance of the copper-plastic composite tape lapping and shielding layer 5 is 3mm to 8 mm. In a specific embodiment, the copper-plastic composite belt comprises a copper foil layer and a PET film layer, wherein the thickness of the copper foil layer is 8-25 μm, and the thickness of the PET film layer is not less than 5 times of that of the copper foil layer. The stainless steel wire armor layer 7 is formed by weaving stainless steel wires and aramid fiber strands in a mixed winding mode, and the diameter of the aramid fiber strands is not more than 85% of that of the stainless steel wires. The thickness of the silane grafted crosslinked high-density polyethylene inner sheath 6 is 0.5mm to 1.2 mm. The thickness of the silane grafted cross-linked high-density polyethylene outer sheath 9 is not more than 8 mm.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The shielding enhancement type rat and ant prevention underground communication cable is characterized in that: the cable comprises a plurality of insulating wire cores (1) and an iron powder polyethylene composite resin core material (2) which are jointly twisted to form a cable core, wherein the outside of the cable core is sequentially coated with an iron powder polyethylene composite resin wrapping layer (3), a shielding mesh conductor layer (4), a copper-plastic composite tape wrapping shielding layer (5), a silane grafted crosslinked high-density polyethylene inner sheath (6), a stainless steel wire armor layer (7), a nylon anticorrosive layer (8) and a silane grafted crosslinked high-density polyethylene outer sheath (9), the insulating wire cores (1) comprise inner conductors (11) and silane grafted crosslinked low-density polyethylene insulating layers (12), insulating lubricating silicone grease is filled between the inner conductors (11) and the silane grafted crosslinked low-density polyethylene insulating layers (12), and the iron powder polyethylene composite resin wrapping layer (3) is of an iron powder polyethylene composite resin one-way spiral lapping and covering wrapping structure, shielding netted conductor layer (4) are polyester fiber copper foil silk and tinned copper wire and each other weave the constitution for reverse spiral winding, polyester fiber copper foil silk line footpath with tinned copper wire line footpath is different and the line footpath ratio is between 0.9 to 1, the copper is moulded composite band and is taken the lid for the one-way spiral of copper is moulded composite band around package shielding layer (5) and take around the package structure, stainless steel wire armor (7) are that stainless steel wire and aramid fiber stranded conductor mixed winding weave constitutes, aramid fiber stranded conductor line footpath is not more than 85% of stainless steel wire line footpath.

2. The shielding-enhanced rat/ant-proof underground communication cable according to claim 1, wherein: the cable core lay length is 15 to 30 times of the outer diameter of the insulated wire core (1).

3. The shielding-enhanced rat/ant-proof underground communication cable according to claim 1, wherein: the inner conductor (11) is formed by concentrically twisting a plurality of tinned copper monofilaments with the diameters of 0.01mm to 0.04mm, and the twisting direction of the tinned copper monofilaments is opposite to that of the insulated wire core (1).

4. The shielding-enhanced rat/ant-proof underground communication cable according to claim 1, wherein: the iron powder polyethylene composite resin is wound around the covering (3) in the opposite direction to the twisting direction of the insulated wire core (1).

5. The shielding-enhanced rat/ant-proof underground communication cable according to claim 1, wherein: the thickness of the copper-plastic composite tape lapping shielding layer (5) is one fifth to one tenth of that of the shielding mesh conductor layer (4).

6. The shielding-enhanced rat/ant-proof underground communication cable according to claim 1, wherein: the copper-plastic composite belt comprises a copper foil layer and a PET (polyethylene terephthalate) film layer, wherein the thickness of the copper foil layer is 8-25 mu m, and the thickness of the PET film layer is not less than 5 times of that of the copper foil layer.

7. The shielding-enhanced rat/ant-proof underground communication cable according to claim 1, wherein: the winding distance of the copper-plastic composite tape lapping shielding layer (5) is 3mm to 8 mm.

8. The shielding-enhanced rat/ant-proof underground communication cable according to claim 1, wherein: the thickness of the silane grafted cross-linked high-density polyethylene inner sheath (6) is 0.5mm to 1.2 mm.

9. The shielding-enhanced rat/ant proof underground communication cable according to claim 1, wherein: the thickness of the silane grafted cross-linked high-density polyethylene outer sheath (9) is not more than 8 mm.

10. The shielding-enhanced rat/ant-proof underground communication cable according to claim 1, wherein: the inner surface of the silane grafted cross-linked high-density polyethylene outer sheath (9) is provided with a thermoplastic EVA bonding layer.