CN217008726U

CN217008726U - High-elasticity recovery type small-diameter multi-core shielded cable

Info

Publication number: CN217008726U
Application number: CN202220449095.5U
Authority: CN
Inventors: 黄建卫; 蔡长威; 刘书鑫; 王礼国; 丁志楠
Original assignee: Zhejiang Products Zhongda Cable Co ltd
Current assignee: Zhejiang Products Zhongda Cable Co ltd
Priority date: 2022-03-03
Filing date: 2022-03-03
Publication date: 2022-07-19
Anticipated expiration: 2032-03-03

Abstract

The utility model discloses a high-elasticity-recovery type small-diameter multi-core shielding cable which comprises a cable core formed by jointly twisting a plurality of insulating wire cores around a TPU elastomer filling core, wherein the outer diameter of the cable core is not more than 1.6mm, each insulating wire core comprises an inner conductor and a PFA insulating layer, a cross-linked fluororubber insulator, a conductive fiber winding shielding layer and a polyurethane outer sheath are sequentially coated outside the cable core, each cross-linked fluororubber insulator comprises an inner cylinder and an outer cylinder, a plurality of connecting plate bodies are radially and uniformly distributed between the inner cylinder and the outer cylinder, the conductive fiber winding shielding layer is a cylindrical supporting net body formed by lapping and weaving inner and outer double-layer aramid twisted wires in a reverse spiral mode, a plurality of conductive fiber bundles are uniformly distributed on the supporting net body in the circumferential direction, and the conductive fiber bundles are formed by twisting a plurality of polyacrylonitrile-based carbon fibers and coating copper conductive coatings. The cable has excellent flexibility and high elastic recovery capability, is not easy to break wires and cores, and ensures stable electrical characteristics.

Description

High-elasticity recovery type small-diameter multi-core shielded cable

Technical Field

The utility model relates to the technical field of cables, in particular to a high-elasticity recovery type small-diameter multi-core shielding cable.

Background

Multi-core cables are commonly used in medical devices, robots, mobile drive systems, and the like. Due to the rapid development of transmission technology, maintenance testing technology and the like, multi-core cables gradually develop to be small in diameter, light in weight and light in weight. Under the prerequisite of thin footpath preparation, the sinle silk external diameter is on the small side, also can reduce the tensile strength and the resistant crooked characteristic of conductor, and the cable is suffered repeated bending in the course of the work and is buckled the back, takes place to warp easily, is difficult to rely on self elasticity reconversion, influences follow-up normal work to, also very easily appear broken string disconnected core phenomenon after bending deformation, electric properties is unstable, and durability is poor.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a high-elasticity recovery type small-diameter multi-core shielding cable which has excellent flexibility and high-elasticity recovery capability, is not easy to break wires and cores, ensures stable electrical characteristics and has better durability on the premise of light and light manufacturing of small diameter.

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

Thin footpath multicore shielded cable of high elasticity recovery formula includes that a plurality of insulation core twine around TPU elastomer filler core jointly and constitute the cable core, the cable core external diameter is no longer than 1.6mm, insulation core includes inner conductor and PFA insulating layer, the cable core outside cladding has crosslinked fluororubber insulator, conductive fiber winding shielding layer and polyurethane oversheath in proper order, crosslinked fluororubber insulator includes interior cylinder body and outer cylinder body, interior cylinder body with it has a plurality of connection plate bodies to be radial equipartition between the outer cylinder body, conductive fiber winding shielding layer is interior outer double-deck aramid fiber twisted wire each other for reverse spiral around the package weave formation cylinder supporting network body, circumference evenly has laid a plurality of conductive fiber bundles on the supporting network body, conductive fiber bundles are that a plurality of polyacrylonitrile base carbon fiber strand and coating copper conductive coating form.

Preferably, the outer diameter of the insulated wire core is 0.1mm to 0.3 mm.

Preferably, the inner conductor is formed by concentrically twisting a plurality of tinned copper monofilaments with the diameter of 0.01mm to 0.03 mm.

Preferably, the diameter of the inner-layer aramid twisted wire is 0.05mm to 0.12mm, the diameter of the outer-layer aramid twisted wire is 0.08mm to 0.15mm, and the diameter of the outer-layer aramid twisted wire is larger than that of the inner-layer aramid twisted wire.

Preferably, the spiral angle of the inner and outer double-layer aramid twisted wires is 40-55 degrees.

Preferably, the thickness of the conductive fiber winding shielding layer is not more than 0.25 mm.

Preferably, the PFA insulating layer is 0.03mm to 0.1mm thick.

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

Preferably, the inner surface of the polyurethane outer sheath is provided with a thermoplastic polyurethane bonding layer.

Preferably, the polyurethane outer sheath has a thickness of no more than 0.5 mm.

The utility model has the beneficial effects that:

1. the insulated wire cores and the TPU elastomer filling cores are jointly twisted, so that the lateral pressure and extrusion force of each insulated wire core in bending can be relieved, the stress concentration in the cable core can be relieved, the occurrence of wire breakage and core breakage of each wire core can be reduced, the electrical characteristics and the safety and reliability of the cable can be improved, meanwhile, the TPU elastomer has high elasticity and high mechanical strength, the cable can be quickly and elastically restored to the original state after being bent, the electrical stability of the cable under a long-period working condition can be ensured, and the durability and the usability are better.

2. The inner sheath layer outside the cable core adopts the cross-linked fluororubber insulator with a special structural design, the cross-linked fluororubber insulator with a cylindrical structure is beneficial to bearing lateral pressure during bending, the flexibility and the bending resistance of the cable are improved, and meanwhile, the cable is beneficial to being quickly and elastically restored to the original state after being bent, the working stability and the electric performance reliability of the cable are kept, and the cable is durable in use.

3. The conductive fiber winding shielding layer is formed by weaving double-layer aramid twisted yarns into a cylindrical supporting net body, has high strength and high modulus, is beneficial to improving the flexibility and the tensile resistance of the cable, conductive fiber bundles are distributed on the supporting net body, and the conductive fiber bundles are formed by twisting polyacrylonitrile-based carbon fibers and coating copper conductive coatings, so that the conductive fiber winding shielding layer can effectively replace a metal material shielding layer, ensures the stable shielding performance, effectively reduces the weight of the cable, reduces the cost and realizes the requirement of light weight production.

Drawings

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

In the figure: 1-an insulated wire core, 11-an inner conductor, 12-a PFA insulating layer, 2-a TPU elastomer filling core, 3-a cross-linked fluororubber insulator, 31-an inner cylinder, 32-an outer cylinder, 33-a connecting plate body, 4-a conductive fiber winding shielding layer and 5-a polyurethane outer sheath.

Detailed Description

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

As shown in fig. 1, the high-elasticity-recovery small-diameter multi-core shielded cable according to the embodiment of the utility model comprises a plurality of insulated wire cores 1, which are twisted together around a TPU elastomer filling core 2 to form a cable core, wherein the outer diameter of the cable core is not more than 1.6 mm. The insulated wire core 1 comprises an inner conductor 11 and a PFA (Perfluoro fluoro ethylene) 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 0.03mm, and the thickness of the PFA insulating layer 12 is 0.03mm to 0.1 mm. Further, the outer diameter of the insulated wire core 1 is 0.1mm to 0.3 mm.

The cable core is sequentially coated with a cross-linked fluororubber insulator 3, a conductive fiber winding shielding layer 4 and a polyurethane outer sheath 5, and further, the inner surface of the polyurethane outer sheath 5 is provided with a thermoplastic polyurethane bonding layer. The crosslinked fluororubber insulator 3 comprises an inner cylinder 31 and an outer cylinder 32, wherein a plurality of connecting plate bodies 33 are radially and uniformly distributed between the inner cylinder 31 and the outer cylinder 32. Conductive fiber winding shielding layer 4 is that inside and outside double-deck aramid fiber twisted wire is each other for reverse spiral around the package weave formation cylinder support network body, and is further, the line footpath of inlayer aramid fiber twisted wire is 0.05mm to 0.12mm, the line footpath of outer aramid fiber twisted wire is 0.08mm to 0.15mm, the line footpath of outer aramid fiber twisted wire is greater than the line footpath of inlayer aramid fiber twisted wire, and is further, the spiral angle of inside and outside double-deck aramid fiber twisted wire is 40 degrees to 55 degrees. The supporting net body is uniformly distributed with a plurality of conductive fiber bundles in the circumferential direction, the conductive fiber bundles are formed by stranding a plurality of polyacrylonitrile-based carbon fibers and coating the polyacrylonitrile-based carbon fibers with a copper conductive coating, and preferably, the wire diameter of the polyacrylonitrile-based carbon fibers is not more than 25 mu m. The thickness of the conductive fiber winding shielding layer 4 is not more than 0.25 mm. The thickness of the polyurethane outer sheath 5 is not more than 0.5 mm.

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

1. High elasticity recovery type small-diameter multi-core shielded cable is characterized in that: comprises a plurality of insulated wire cores (1) which are twisted together around a TPU elastomer filling core (2) to form a cable core, the outer diameter of the cable core is not more than 1.6mm, the insulated wire core (1) comprises an inner conductor (11) and a PFA insulating layer (12), the cable core is coated with a cross-linked fluororubber insulator (3), a conductive fiber winding shielding layer (4) and a polyurethane outer sheath (5) in sequence, the cross-linked fluororubber insulator (3) comprises an inner cylinder (31) and an outer cylinder (32), a plurality of connecting plate bodies (33) are radially and uniformly distributed between the inner cylinder body (31) and the outer cylinder body (32), the conductive fiber winding shielding layer (4) is a cylindrical supporting net body formed by lapping and weaving an inner aramid fiber twisted wire and an outer aramid fiber twisted wire in a reverse spiral way, a plurality of conductive fiber bundles are uniformly distributed on the supporting net body in the circumferential direction, and the conductive fiber bundles are formed by stranding a plurality of polyacrylonitrile-based carbon fibers and coating copper conductive coatings.

2. The high elasticity restored small diameter multi-core shielded cable of claim 1, wherein: the outer diameter of the insulated wire core (1) is 0.1 mm-0.3 mm.

3. The high elasticity restored small diameter multi-core shielded cable of claim 1, wherein: the inner conductor (11) is formed by concentrically twisting a plurality of tinned copper monofilaments with the diameter of 0.01mm to 0.03 mm.

4. The high elasticity restored small diameter multi-core shielded cable of claim 1, wherein: the diameter of the inner-layer aramid twisted wire is 0.05mm to 0.12mm, the diameter of the outer-layer aramid twisted wire is 0.08mm to 0.15mm, and the diameter of the outer-layer aramid twisted wire is larger than that of the inner-layer aramid twisted wire.

5. The high elasticity restored small diameter multi-core shielded cable of claim 1, wherein: the spiral angle of the inner and outer double-layer aramid twisted wires is 40-55 degrees.

6. The high elasticity restored small diameter multi-core shielded cable of claim 1, wherein: the thickness of the conductive fiber winding shielding layer (4) is not more than 0.25 mm.

7. The high elasticity restored small diameter multi-core shielded cable of claim 1, wherein: the PFA insulating layer (12) has a thickness of 0.03mm to 0.1 mm.

8. The high elasticity restored small diameter multi-core shielded cable of claim 1, wherein: the wire diameter of the polyacrylonitrile-based carbon fiber is not more than 25 μm.

9. The high elasticity restored small diameter multi-core shielded cable of claim 1, wherein: the inner surface of the polyurethane outer sheath (5) is provided with a thermoplastic polyurethane bonding layer.

10. The high elasticity restored small diameter multi-core shielded cable of claim 1, wherein: the thickness of the polyurethane outer sheath (5) is not more than 0.5 mm.