CN114300185A

CN114300185A - High-elasticity recovery type multi-core cable capable of preventing signal crosstalk

Info

Publication number: CN114300185A
Application number: CN202210134022.1A
Authority: CN
Inventors: 陈婉芳; 王登峰; 邵千俊; 王礼国; 丁志楠; 刘书鑫
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: 2022-04-08

Abstract

The invention discloses a high-elasticity-recovery-type signal crosstalk prevention multi-core cable which comprises two power supply wire cores and two control wire cores, wherein the two power supply wire cores and the two control wire cores are twisted together around a cross-linked fluororubber elastic body to form a cable core, a drain conductor is sleeved in the cross-linked fluororubber elastic body, a cross-linked fluororubber elastic inner sheath, a conductive fiber winding shielding layer and a polyurethane extrusion outer sheath are sequentially coated outside the cable core, the cross-linked fluororubber elastic body and the cross-linked fluororubber elastic inner sheath respectively comprise 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 power supply wire cores comprise power supply conductors, cross-linked polyethylene inner insulating layers and PPS outer insulating layers, the control wire cores are formed by twisting two insulation wire cores, and each insulation wire core comprises a control conductor and an FEP extrusion insulating layer. The multi-core cable has excellent extrusion resistance and high elastic recovery capability, effectively prevents the phenomenon of signal crosstalk inside the cable core, and ensures the stability of electrical characteristics.

Description

High-elasticity recovery type multi-core cable capable of preventing signal crosstalk

Technical Field

The invention relates to the technical field of cables, in particular to a high-elasticity recovery type signal crosstalk prevention multi-core cable.

Background

The multi-core cable is generally formed by twisting a power supply wire core and a pair-twisted wire core together, however, two or more pair-twisted wire cores are usually twisted in a cable core of the multi-core cable, and under a normal working environment, the problem of signal crosstalk easily occurs due to direct contact between the pair-twisted wire cores, so that the shielding performance of the cable is unstable, and normal work is influenced. Moreover, after the multi-core cable is subjected to bending extrusion in the laying process, the multi-core cable is difficult to restore the original shape by means of the elasticity of the multi-core cable, and the deformation caused by the bending extrusion is easy to cause disconnection and core breaking, so that the electrical performance is unstable, and the safety and the reliability of the cable are poor.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to solve the technical problem of providing a high-elasticity recovery type signal crosstalk prevention multi-core cable which has excellent extrusion resistance and high elasticity recovery capability, avoids the occurrence of wire breakage and core breakage, can effectively prevent the phenomenon of signal crosstalk in a cable core, ensures the stability of electrical characteristics, and has excellent heat resistance and durable use.

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

High elasticity recovery type prevents signal crosstalk multicore cable, constitute the cable core around the common transposition of a crosslinked fluororubber elastomer including two power sinle silks and two control sinle silks, the internal cover of crosslinked fluororubber elastomer is equipped with the conductor of disturbing, the cable core outside cladding in proper order has crosslinked fluororubber elasticity inner sheath, conductive fiber winding shielding layer and polyurethane crowded package oversheath, crosslinked fluororubber elastomer with crosslinked fluororubber elasticity inner sheath all 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, power sinle silk includes power conductor, crosslinked polyethylene inner insulating layer and PPS outer insulating layer, control sinle silk comprises two insulation core counterpins, insulation sinle silk includes control conductor and FEP crowded package insulating layer.

Preferably, the twisting direction of the insulated wire core is the same as that of the cable core.

Preferably, the power conductor is formed by stranding a plurality of tinned copper monofilaments with the diameter of 0.05mm to 0.08 mm.

Preferably, the control conductor is formed by concentrically twisting a plurality of tinned copper monofilaments with the diameter of 0.02mm to 0.04 mm.

Preferably, the drain conductor is formed by twisting and pressing a plurality of soft copper wires to form a round conductor structure.

Preferably, the power core and the control core have an outer diameter ratio of 1:1 to 1.15: 1.

Preferably, the ratio of the outer diameters of the insulated wire core and the crosslinked fluororubber elastomer is 1:1 to 1.25: 1.

Preferably, the conductive fiber winding shielding layer is a conductive fiber bundle spiral winding structure, the conductive fiber bundle is formed by twisting two polyacrylonitrile-based carbon fibers with different wire diameters and coating a copper conductive coating, and the wire diameter of the polyacrylonitrile-based carbon fiber is not more than 25 μm.

Preferably, the crosslinked polyethylene inner insulating layer and the PPS outer insulating layer have a total thickness of 0.2mm to 0.5 mm.

Preferably, the FEP extrusion insulation layer is 0.1mm to 0.3mm thick.

The invention has the beneficial effects that:

1. the cross-linked fluororubber elastomer is beneficial to improving the flexibility of the cable core, reducing the local stress concentration of each cable core in the cable core, bearing the lateral pressure during bending, effectively preventing the internal drain conductor from deforming and breaking the cable core, isolating and jointly twisting the two control cable cores by arranging the cross-linked fluororubber elastomer through the drain conductor sleeve, effectively preventing the direct signal crosstalk of the two control cable cores from occurring and ensuring the stable electrical characteristics of the cable.

2. The two power wire cores and the two control wire cores are twisted with the cross-linked fluororubber elastic body, and the cross-linked fluororubber elastic inner sheath is coated outside the cable core, the cross-linked fluororubber elastic body and the cross-linked fluororubber elastic inner sheath are cross-linked fluororubber insulator with special structural design, the cross-linked fluororubber insulator with the cylindrical structure is beneficial to bearing the lateral pressure during bending, the lateral pressure and extrusion force of each wire core during bending are reduced, the stress concentration in the cable core is relieved, the occurrence of wire core breakage and core breakage is reduced, the electrical characteristics and safety and reliability of the cable are improved, the cable can be beneficial to being quickly and elastically restored to the original state after being subjected to bending extrusion in the cable laying process, each wire core is restored to the initial state position, the wire breakage and core breakage caused by deformation are avoided, and the working stability and the electrical performance reliability of the cable are kept, the use is durable.

3. The power sinle silk adopts crosslinked polyethylene inner insulating layer and PPS outer insulating layer, and the PPS resin has excellent heat resistance and high mechanical strength, and the heat stability of power sinle silk is better, and the PPS outer insulating layer has formed the guard action as crosslinked polyethylene inner insulating layer's reinforcement structure, improves mechanical strength, guarantees the stable electrical insulation characteristic of power sinle silk, and durability is better.

4. The conductive fiber winding shielding layer is beneficial to light weight production and cost reduction, the conductive fiber bundle of the conductive fiber shielding layer is formed by twisting two polyacrylonitrile-based carbon fibers with different wire diameters and coating a copper conductive coating, internal signals or noise can be effectively inhibited from leaking to the outside, interference from external signals is inhibited, and the stability of the shielding effect of the cable is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following brief description of the drawings which are needed for practical purposes will be made, and it is obvious that the drawings described below are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

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

In the figure: 1-power wire core, 11-power conductor, 12-crosslinked polyethylene inner insulating layer, 13-PPS outer insulating layer, 2-control wire core, 21-insulating wire core, 211-control conductor, 212-FEP extruded insulating layer, 3-crosslinked fluororubber elastomer, 4-interference conductor, 5-crosslinked fluororubber elastic inner sheath, 6-conductive fiber wound shielding layer and 7-polyurethane extruded outer sheath.

Detailed Description

The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.

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 are clearly and completely described with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments.

As shown in fig. 1, the high-elasticity-recovery signal crosstalk prevention multi-core cable according to the embodiment of the present invention includes two power cores 1 and two control cores 2, which are jointly twisted around a cross-linked fluororubber elastomer 3 to form a cable core, further, an outer diameter ratio of the power cores 1 to the control cores 2 is 1:1 to 1.15:1, and an outer diameter ratio of the insulated cores 21 to the cross-linked fluororubber elastomer 3 is 1:1 to 1.25: 1. The power supply wire core 1 comprises a power supply conductor 11, a crosslinked polyethylene inner insulating layer 12 and a PPS outer insulating layer 13, and specifically, the power supply conductor 11 is formed by stranding a plurality of tinned copper monofilaments with the diameters of 0.05mm to 0.08 mm. The combined thickness of the crosslinked polyethylene inner insulating layer 12 and the PPS outer insulating layer 13 is 0.2mm to 0.5 mm. The control wire core 2 is formed by twisting two insulated wire cores 21 in pairs, the insulated wire cores 21 comprise control conductors 211 and FEP extruded insulating layers 212, and furthermore, the twisting direction of the insulated wire cores 21 is the same as that of the cable core. Specifically, the control conductor 211 is formed by concentrically twisting a plurality of tinned copper monofilaments with the diameter of 0.02mm to 0.04 mm. The FEP extruded insulation layer 212 is 0.1mm to 0.3mm thick. The cross-linked fluororubber elastomer 3 is internally sleeved with a drain conductor 4, and specifically, the drain conductor 3 is a round conductor structure formed by twisting and pressing a plurality of soft copper wires.

The cable core is coated with a cross-linked fluororubber elastic inner sheath 5, a conductive fiber winding shielding layer 6 and a polyurethane extruded outer sheath 7 in sequence, the cross-linked fluororubber elastomer 3 and the cross-linked fluororubber elastic inner sheath 5 both comprise an inner cylinder body and an outer cylinder body, and a plurality of connecting plate bodies are radially and uniformly distributed between the inner cylinder body and the outer cylinder body. In one embodiment, the conductive fiber winding shielding layer 6 is a conductive fiber bundle spiral winding structure, the conductive fiber bundle is formed by twisting two polyacrylonitrile-based carbon fibers with different wire diameters and coating a copper conductive coating layer, and the wire diameter of the polyacrylonitrile-based carbon fiber is not more than 25 μm.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. High elasticity recovery prevents signal crosstalk multicore cable, characterized by: comprises two power wire cores (1) and two control wire cores (2) which are twisted together around a cross-linked fluorine rubber elastomer (3) to form a cable core, a drain conductor (4) is sleeved in the crosslinked fluororubber elastomer (3), a crosslinked fluororubber elastic inner sheath (5), a conductive fiber winding shielding layer (6) and a polyurethane extruded outer sheath (7) are sequentially coated outside the cable core, the cross-linked fluororubber elastomer (3) and the cross-linked fluororubber elastic inner sheath (5) both comprise an inner cylinder and an outer cylinder, a plurality of connecting plate bodies are radially and uniformly distributed between the inner cylinder body and the outer cylinder body, the power supply wire core (1) comprises a power supply conductor (11), a crosslinked polyethylene inner insulating layer (12) and a PPS outer insulating layer (13), the control wire core (2) is formed by twisting two insulated wire cores (21) in pairs, and each insulated wire core (21) comprises a control conductor (211) and an FEP extruded insulating layer (212).

2. The highly resilient recovery signal crosstalk resistant multi-core cable of claim 1, wherein: the twisting direction of the insulated wire core (21) is the same as that of the cable core.

3. The highly resilient recovery signal crosstalk resistant multi-core cable of claim 1, wherein: the power supply conductor (11) is formed by stranding a plurality of tinned copper monofilaments with the diameter of 0.05mm to 0.08 mm.

4. The highly resilient recovery signal crosstalk resistant multi-core cable of claim 1, wherein: the control conductor (211) is formed by concentrically twisting a plurality of tinned copper monofilaments with the diameters of 0.02mm to 0.04 mm.

5. The highly resilient recovery signal crosstalk resistant multi-core cable of claim 1, wherein: the drain conductor (3) is a round conductor structure formed by twisting and pressing a plurality of soft copper wires.

6. The highly resilient recovery signal crosstalk resistant multi-core cable of claim 1, wherein: the ratio of the outer diameters of the power wire core (1) and the control wire core (2) is 1:1 to 1.15: 1.

7. The highly resilient recovery signal crosstalk resistant multi-core cable of claim 1, wherein: the ratio of the outer diameters of the insulated wire core (21) and the cross-linked fluororubber elastomer (3) is 1:1 to 1.25: 1.

8. The highly resilient recovery signal crosstalk resistant multi-core cable of claim 1, wherein: the conductive fiber winding shielding layer (6) is of a conductive fiber bundle spiral winding structure, the conductive fiber bundle is formed by twisting two polyacrylonitrile-based carbon fibers with different wire diameters and coating a copper conductive coating, and the wire diameter of the polyacrylonitrile-based carbon fiber is not more than 25 mu m.

9. The highly resilient recovery signal crosstalk resistant multi-core cable of claim 1, wherein: the total thickness of the crosslinked polyethylene inner insulating layer (12) and the PPS outer insulating layer (13) is 0.2mm to 0.5 mm.

10. The highly resilient recovery signal crosstalk resistant multi-core cable of claim 1, wherein: the FEP extruded insulation layer (212) is 0.1 mm-0.3 mm thick.