CN217008719U

CN217008719U - Anti-loosening and anti-stretching type small-diameter multi-core insulated cable

Info

Publication number: CN217008719U
Application number: CN202220332415.9U
Authority: CN
Inventors: 屠渭江; 王成旺; 李清华; 吴英俊; 王礼国
Original assignee: Zhejiang Products Zhongda Cable Co ltd
Current assignee: Zhejiang Products Zhongda Cable Co ltd
Priority date: 2022-02-14
Filing date: 2022-02-14
Publication date: 2022-07-19
Anticipated expiration: 2032-02-14

Abstract

The utility model discloses a loose-proof and tensile-resistant small-diameter multi-core insulated cable which comprises a plurality of insulated wire cores and an iron powder polypropylene resin core material which are jointly twisted to form a cable core, wherein the insulated wire cores are spaced by the iron powder polypropylene resin core material, the outside of the cable core is sequentially coated with an AFRP reinforced wrapping layer, an iron powder polypropylene resin tape wrapping layer, a conductive fiber winding shielding layer and a silane grafted and crosslinked high-density polyethylene outer sheath, the AFRP reinforced wrapping layer is formed by spirally wrapping four to ten reinforced aramid twisted wires in parallel, the reinforced aramid twisted wires are formed by thermally bonding a plurality of aramid fiber bundles and a thermoplastic polypropylene core material into a whole and jointly coating a PET resin layer, the twisting direction of the AFRP reinforced wrapping layer is opposite to that of the cable core, and the outer diameter of the silane grafted and crosslinked high-density polyethylene outer sheath is 1.6mm to 3.5 mm. The cable core is not easy to loosen, the tensile resistance is improved, the electrical characteristics are stable, and the cable is durable in use.

Description

Anti-loosening and anti-stretching type small-diameter multi-core insulated cable

Technical Field

The utility model relates to the technical field of cables, in particular to a loose-proof and tensile-resistant thin-diameter multi-core insulated cable.

Background

Multi-core cables are commonly used in medical devices, robots, mobile drive systems, and the like. Due to rapid development of transmission technology, maintenance testing technology and the like, the multi-core cable gradually develops to be thin and light. Under the premise of fine-diameter manufacturing, the outer diameter of the wire core is smaller, the tensile strength and the bending resistance of the conductor can be reduced, the cable is repeatedly bent in the working process, the cable core formed by the multiple wire cores is easy to loosen, the tensile resistance is reduced, the phenomena of wire breaking and core breaking are easy to occur, the electrical characteristics are greatly influenced, and the durability and the usability are poor.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model aims to solve the technical problem of providing the anti-loosening and anti-stretching small-diameter multi-core insulated cable, wherein the cable core is not easy to loosen on the premise of manufacturing the small diameter and light weight, the anti-stretching performance is improved, the electrical characteristics are stable, and the cable is durable in use.

The utility model solves the technical problems through the following technical scheme.

The anti-loosening and anti-stretching small-diameter multi-core insulated cable comprises a plurality of insulated wire cores and an iron powder polypropylene resin core material which are jointly twisted to form a cable core, wherein the insulated wire cores are spaced by the iron powder polypropylene resin core material, an AFRP reinforced wrapping layer, an iron powder polypropylene resin tape wrapping layer, a conductive fiber winding shielding layer and a silane grafted and crosslinked high-density polyethylene outer sheath are sequentially coated outside the cable core, the insulated wire cores comprise an inner conductor and a silane grafted and crosslinked low-density polyethylene insulating layer, the AFRP reinforced wrapping layer is formed by parallel and spiral wrapping of four to ten reinforced aramid twisted wires, the reinforced aramid twisted wires are formed by hot-melting and bonding a plurality of aramid fiber bundles and a thermoplastic polypropylene core material into a whole and jointly wrap a PET resin layer, the thickness of the PET resin layer is not less than 40 mu m, and the wrapping direction of the AFRP reinforced wrapping layer is opposite to the twisting direction of the cable core material, the outer diameter of the silane grafted cross-linked high-density polyethylene outer sheath is 1.6 mm-3.5 mm.

Preferably, the inner conductor has a diameter of 0.12mm to 0.18 mm.

Preferably, the inner conductor is formed by concentrically twisting a plurality of tinned copper monofilaments with the diameter of 0.01mm to 0.04 mm.

Preferably, the reinforced aramid twisted yarn has a yarn diameter of 0.08mm to 0.12 mm.

Preferably, the interval distance between the insulated wire cores is 0.1mm to 0.3 mm.

Preferably, the reinforced aramid twisted wire is of a unidirectional spiral wrapping structure, and the spiral angle is 35-50 degrees.

Preferably, the iron powder polypropylene resin tape wrapping layer is of an iron powder polypropylene resin tape one-way spiral lapping and covering wrapping structure.

Preferably, the conductive fiber winding shielding layer is a conductive fiber bundle spiral winding structure, the winding density is 95-98%, and the conductive fiber bundle is formed by stranding a plurality of polyacrylonitrile-based carbon fibers and coating a copper conductive coating.

Preferably, the polyacrylonitrile-based carbon fiber has a wire diameter of not more than 25 μm.

Preferably, the thickness of the outer sheath of the silane grafted and crosslinked high-density polyethylene is 0.5mm to 2.2 mm.

The utility model has the beneficial effects that:

1. through at the outside AFRP of cable core enhancement around the covering of reinforceing, optimize around the package structure, adopt four to ten parallel spirals of intensive aramid fiber twisted wire to wind the package and constitute, and wind to and cable core hank to opposite, the effectual cable core that prevents is loose, it is through optimal design to reinforce aramid fiber twisted wire, for a plurality of aramid fiber bundles and thermoplastic polypropylene core hot melt bond become integrative and common cladding PET resin layer, it possesses the high strength to reinforce aramid fiber twisted wire, the difficult broken string that appears twisting, possess the high modulus, help improving the holistic tensile strength of cable core.

2. Silane grafting crosslinking low density polyethylene insulating layer coefficient of static friction is little, help improving the pliability and the resistant bending characteristic of insulated wire core, make insulated cable keep the spacing distance to be 0.1mm to 0.3mm through iron powder polypropylene resin core, lateral pressure when bearing the bending that can be better, lateral pressure can not transmit the inner conductor of insulated wire core easily, be of value to improving stretch-proofing performance, iron powder polypropylene resin core can noise absorption interference and turn into the heat, help improving the electric property of cable.

3. The iron powder polypropylene resin tape is around covering and conductive fiber winding shielding layer constitutes double-deck shielding layer, and the conductive fiber bundle of conductive fiber winding shielding layer is that polyacrylonitrile base carbon fiber twists and scribbles copper conductive coating and form, can effectively replace metal material shielding layer, ensures that shielding performance is stable, effectively lightens cable weight, reduce cost, realizes that lightweight production needs. Simultaneously, through addding iron powder polypropylene resin area around the covering and be used for reinforcing the ability of shielding signal interference, iron powder filler forms iron powder polypropylene resin area with the polypropylene resin complex, the polypropylene resin basic unit can help reducing the stress concentration of conductive fiber winding shielding layer, reduce the moment of torsion power, conductive fiber winding shielding layer can the effectual inside signal of suppression or noise leak to the outside and restrain the interference that comes from the external signal, and, further absorb the noise interference that comes from the outside and convert the heat around the covering through iron powder polypropylene resin area, the external noise interference ability of suppression has been strengthened, the electric shielding performance is more reliable and more stable, durable use.

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, 10-an inner conductor, 11-a silane grafted cross-linked low-density polyethylene insulating layer, 2-an iron powder polypropylene resin core material, a 3-AFRP reinforced wrapping layer, a 4-iron powder polypropylene resin tape wrapping layer, 5-a conductive fiber wound shielding layer and a 6-silane grafted cross-linked 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 technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the 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. 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.

As shown in fig. 1, the loose-proof, stretch-proof, small-diameter and multi-core insulated cable according to the embodiment of the present invention includes a plurality of insulated cores 1 and an iron powder polypropylene resin core 2, which are twisted together to form a cable core, wherein the insulated cores 1 are spaced apart from each other by the iron powder polypropylene resin core 2, and further, the spaced apart distance between the insulated cores 1 is 0.1mm to 0.3 mm. The insulated wire core 1 comprises an inner conductor 10 and a silane grafted cross-linked low-density polyethylene insulated layer 11, and specifically, the inner conductor 10 is formed by concentrically twisting a plurality of tinned copper monofilaments with the diameters of 0.01mm to 0.04 mm. The inner conductor 10 has a diameter of 0.12mm to 0.18 mm.

The cable core is coated with an AFRP reinforced wrapping layer 3, an iron powder polypropylene resin tape wrapping layer 4, a conductive fiber winding shielding layer 5 and a silane grafted cross-linked high-density polyethylene outer sheath 6 in sequence. The AFRP reinforced wrapping layer 3 is formed by four to ten reinforced aramid twisted wires which are spirally wrapped in parallel, specifically, the reinforced aramid twisted wires are of a one-way spiral wrapping structure, the spiral angle is 35-50 degrees, and further, the wire diameter of the reinforced aramid twisted wires is 0.08-0.12 mm. The reinforced aramid twisted wire is formed by hot-melting and bonding a plurality of aramid fiber bundles and a thermoplastic polypropylene core material into a whole and coating a PET resin layer together, the thickness of the PET resin layer is not less than 40 mu m, and the winding direction of the AFRP reinforced winding layer 3 is opposite to the twisting direction of the cable core. In one embodiment, the iron powder polypropylene resin tape wrapping layer 4 is an iron powder polypropylene resin tape one-way spiral lapping and wrapping structure. In one embodiment, the conductive fiber winding shielding layer 5 is a conductive fiber bundle spiral winding structure with a winding density of 95% to 98%, the conductive fiber bundle is formed by twisting a plurality of polyacrylonitrile-based carbon fibers and coating the polyacrylonitrile-based carbon fibers with a copper conductive coating, and preferably, the diameter of the polyacrylonitrile-based carbon fibers is not more than 25 μm. The thickness of the silane grafted cross-linked high-density polyethylene outer sheath 6 is 0.5 mm-2.2 mm. The outer diameter of the silane grafted cross-linked high-density polyethylene outer sheath 6 is 1.6 mm-3.5 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. Prevent loose stretch-proofing type thin footpath multicore insulated cable, characterized by: including a plurality of insulation core (1) and iron powder polypropylene resin core (2) transposition constitution cable core jointly, through between insulation core (1) iron powder polypropylene resin core (2) keep spacing distance, the outside cladding in proper order of cable core has AFRP to strengthen around covering (3), iron powder polypropylene resin area around covering (4), conductive fiber winding shielding layer (5) and silane grafting crosslinking high density polyethylene oversheath (6), insulation core (1) includes inner conductor (10) and silane grafting crosslinking low density polyethylene insulating layer (11), AFRP strengthens around covering (3) for four to ten strengthen aramid fiber twist parallel spiral around the package and constitutes, strengthen aramid fiber and twist for a plurality of aramid fiber bundles and thermoplastic polypropylene core hot melt bonding become integrative and cladding PET resin layer jointly, PET resin layer thickness is not less than 40 mu m, the winding direction of the AFRP reinforced winding layer (3) is opposite to the winding direction of the cable core, and the outer diameter of the silane grafted crosslinked high-density polyethylene outer sheath (6) is 1.6mm to 3.5 mm.

2. The loose-proof, tensile-resistant and small-diameter multi-core insulated cable according to claim 1, which is characterized in that: the inner conductor (10) has a diameter of 0.12mm to 0.18 mm.

3. The loose-proof, tensile-resistant and small-diameter multi-core insulated cable according to claim 1, which is characterized in that: the inner conductor (10) is formed by concentrically twisting a plurality of tinned copper monofilaments with the diameters of 0.01mm to 0.04 mm.

4. The loose-proof, tensile-resistant and thin-diameter multi-core insulated cable according to claim 1, which is characterized in that: the diameter of the reinforced aramid twisted wire is 0.08-0.12 mm.

5. The loose-proof, tensile-resistant and thin-diameter multi-core insulated cable according to claim 1, which is characterized in that: the spacing distance between the insulated wire cores (1) is 0.1mm to 0.3 mm.

6. The loose-proof, tensile-resistant and small-diameter multi-core insulated cable according to claim 1, which is characterized in that: the reinforced aramid twisted wire is of a unidirectional spiral wrapping structure, and the spiral angle is 35-50 degrees.

7. The loose-proof, tensile-resistant and small-diameter multi-core insulated cable according to claim 1, which is characterized in that: the iron powder polypropylene resin tape wrapping layer (4) is of an iron powder polypropylene resin tape one-way spiral lapping and covering wrapping structure.

8. The loose-proof, tensile-resistant and small-diameter multi-core insulated cable according to claim 1, which is characterized in that: the conductive fiber winding shielding layer (5) is a conductive fiber bundle spiral winding structure, the winding density is 95% -98%, and the conductive fiber bundle is formed by stranding a plurality of polyacrylonitrile-based carbon fibers and coating a copper conductive coating.

9. The loose-proof, tensile-resistant and small-diameter multi-core insulated cable according to claim 8, which is characterized in that: the wire diameter of the polyacrylonitrile-based carbon fiber is not more than 25 μm.

10. The loose-proof, tensile-resistant and thin-diameter multi-core insulated cable according to claim 1, which is characterized in that: the thickness of the silane grafted cross-linked high-density polyethylene outer sheath (6) is 0.5 mm-2.2 mm.