CN114300185A - High elastic recovery type anti-signal crosstalk multi-core cable - Google Patents

Abstract

The invention discloses a high-elasticity recovery type anti-signal crosstalk multi-core cable, which comprises two power cores and two control cores that are twisted together around a cross-linked fluororubber elastomer to form a cable core, and the cross-linked fluororubber elastomer is inside the cable core. The sheath is provided with a drain conductor, and the outside of the cable core is sequentially covered with a cross-linked fluororubber elastic inner sheath, a conductive fiber wound shielding layer and a polyurethane extruded outer sheath, cross-linked fluororubber elastomer and cross-linked fluororubber elastic inner sheath. Both include an inner cylinder and an outer cylinder, and between the inner cylinder and the outer cylinder are radially distributed several connecting plates. The power cord core includes a power conductor, a cross-linked polyethylene inner insulating layer and PPS. The outer insulating layer, the control wire core is composed of two insulated wire cores twisted, and the insulated wire core includes the control conductor and the FEP extruded insulation layer. The multi-core cable has excellent extrusion resistance and high elastic recovery ability, which can effectively prevent crosstalk of signals inside the cable core and ensure the stability of electrical characteristics.

Description

High elastic recovery type anti-signal crosstalk multi-core cable

technical field

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

Background technique

Multi-core cables are usually formed by twisting power cores and twisted-pair cores together. However, the cores of multi-core cables are usually twisted with two or more twisted-pair cores. Under normal working conditions, Due to the direct contact between the twisted pair cores, signal crosstalk is prone to occur, resulting in unstable cable shielding performance and affecting normal operation. Moreover, after being bent and squeezed during the laying process of the multi-core cable, it is difficult to rely on its own elasticity to restore the original state.

SUMMARY OF THE INVENTION

Aiming at the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a high-elasticity recovery type anti-signal crosstalk multi-core cable, which has excellent extrusion resistance and high elastic recovery ability, avoids wire breakage and core breakage, and can Effectively prevent signal crosstalk inside the cable core, ensure the stability of electrical characteristics, excellent heat resistance and durable use.

The present invention solves the above technical problems through the following technical solutions.

The high-elasticity recovery type anti-signal crosstalk multi-core cable includes two power cores and two control cores twisted together around a cross-linked fluororubber elastomer to form a cable core, and the cross-linked fluororubber elastomer is sheathed with rows of The outer part of the cable core is sequentially covered with a cross-linked fluororubber elastic inner sheath, a conductive fiber wound shielding layer and a polyurethane extruded outer sheath, the cross-linked fluororubber elastomer and the cross-linked fluororubber elastic The inner sheath includes an inner cylindrical body and an outer cylindrical body, a plurality of connecting plates are evenly distributed in a radial shape between the inner cylindrical body and the outer cylindrical body, and the power cord core includes a power supply conductor, Cross-linked polyethylene inner insulation layer and PPS outer insulation layer, the control wire core is composed of two insulated wire cores twisted, and the insulated wire core includes a control conductor and a FEP extruded insulation layer.

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

Preferably, the power conductor is composed of several tinned copper monofilaments with a diameter of 0.05mm to 0.08mm twisted together.

Preferably, the control conductor is composed of several tinned copper monofilaments with a diameter of 0.02 mm to 0.04 mm concentrically twisted.

Preferably, the drain conductor is a plurality of soft copper wires twisted and compressed to form a circular conductor structure.

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

Preferably, the outer diameter ratio of the insulated wire core and the cross-linked fluororubber elastomer is 1:1 to 1.25:1.

Preferably, the conductive fiber winding shielding layer is a conductive fiber bundle helically wound structure, and 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 polyacrylonitrile The wire diameter of the base carbon fiber does not exceed 25 μm.

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

Preferably, the thickness of the FEP extruded insulating layer is 0.1 mm to 0.3 mm.

Beneficial effects of the present invention:

1. The drain conductor located in the middle of the cable core is sheathed with a cross-linked fluororubber elastomer with special structural design. The cross-linked fluororubber elastomer helps to improve the flexibility of the cable core and reduce the local stress concentration of each core in the cable core. , help to withstand the lateral pressure during bending, effectively prevent the internal drain conductor from deforming and breaking the core. The direct signal crosstalk between the two control wire cores is prevented, and the stable electrical characteristics of the cable are ensured.

2. The cross-linked fluororubber elastomer is twisted through two power cores and two control wire cores, and the cross-linked fluororubber elastic inner sheath, the cross-linked fluororubber elastomer and the cross-linked fluororubber are coated on the outside of the cable core. The rubber elastic inner sheath adopts a cross-linked fluororubber insulator with special structure design. The cross-linked fluororubber insulator with a cylindrical structure helps to withstand the lateral pressure during bending, and relieves the lateral pressure of each wire core when it is subjected to bending. It helps to relieve the stress concentration inside the cable core, reduce the occurrence of wire breakage and core breakage, and improve the electrical characteristics and safety and reliability of the cable. Quickly and elastically return to the original state, and each wire core returns to the original state position, avoiding broken wires and cores caused by deformation, maintaining the stability of cable operation and electrical performance reliability, and durable use.

3. The power cord core adopts cross-linked polyethylene inner insulating layer and PPS outer insulating layer. PPS resin has excellent heat resistance and high mechanical strength, and the thermal stability of the power cord core is better. The reinforcing structure of the vinyl inner insulating layer forms a protective effect, improves the mechanical strength, ensures the stable electrical insulation properties of the power cord core, and has better durability.

4. The use of conductive fiber to wrap the shielding layer is helpful for light-weight and lightweight production and reduce costs. The conductive fiber bundle of the conductive fiber shielding layer is formed by twisting two kinds of polyacrylonitrile-based carbon fibers with different wire diameters and coated with a copper conductive coating. It can effectively suppress the leakage of internal signals or noises to the outside and the interference from external signals to ensure the stability of the shielding effect of the cable.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the practical drawings required in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings described below These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

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

In the figure: 1- power core, 11- power conductor, 12- XLPE inner insulation layer, 13-PPS outer insulation layer, 2- control core, 21- insulated core, 211- control conductor, 212- FEP extruded insulation layer, 3-cross-linked fluororubber elastomer, 4-drainage conductor, 5-cross-linked fluororubber elastic inner sheath, 6-conductive fiber winding shielding layer, 7-polyurethane extruded outer sheath.

Detailed ways

The present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

In order to make the purposes, 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. Obviously, the described embodiments are Some, but not all, embodiments of the present invention.

As shown in FIG. 1 , the high-elasticity recovery type anti-signal crosstalk multi-core cable according to the embodiment of the present invention includes two power cores 1 and two control cores 2 that are twisted together around a cross-linked fluororubber elastomer 3 to form a cable Further, the outer diameter ratio of the power core 1 and the control core 2 is 1:1 to 1.15:1, and the outer diameter of the insulating core 21 and the cross-linked fluororubber elastomer 3 The ratio is 1:1 to 1.25:1. The power core 1 includes a power conductor 11, a cross-linked polyethylene inner insulating layer 12 and a PPS outer insulating layer 13. Specifically, the power conductor 11 is a plurality of tinned copper monofilament strands with a diameter of 0.05mm to 0.08mm. composition. The total thickness of the cross-linked polyethylene inner insulating layer 12 and the PPS outer insulating layer 13 is 0.2 mm to 0.5 mm. The control wire core 2 is composed of two insulated wire cores 21 twisted together. The insulated wire core 21 includes a control conductor 211 and a FEP extruded insulating layer 212. Further, the insulated wire core 21 is twisted to the cable. The cores are twisted in the same direction. Specifically, the control conductor 211 is composed of several tinned copper monofilaments with a diameter of 0.02 mm to 0.04 mm concentrically twisted. The thickness of the FEP extruded insulating layer 212 is 0.1 mm to 0.3 mm. The cross-linked fluororubber elastomer 3 is sleeved with a drain conductor 4 . Specifically, the drain conductor 3 is a circular conductor structure formed by twisting and pressing several soft copper wires.

The outside of the cable core is sequentially covered with a cross-linked fluororubber elastic inner sheath 5, a conductive fiber wound shielding layer 6 and a polyurethane extruded outer sheath 7, the cross-linked fluororubber elastomer 3 and the cross-linked fluororubber Each of the elastic inner sheaths 5 includes an inner cylinder and an outer cylinder, and a plurality of connecting plates are evenly distributed between the inner cylinder and the outer cylinder in a radial shape. In one embodiment, the conductive fiber winding shielding layer 6 is a conductive fiber bundle helically wound structure, and the conductive fiber bundle is formed by twisting two kinds of polyacrylonitrile-based carbon fibers with different wire diameters and coating a copper conductive coating. The wire diameter of the polyacrylonitrile-based carbon fiber does not exceed 25 μm.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A high-elasticity recovery type anti-signal crosstalk multi-core cable, characterized in that it includes two power cores (1) and two control cores (2) that are twisted together around a cross-linked fluororubber elastomer (3). A cable core, the cross-linked fluororubber elastomer (3) is internally sheathed with a drain conductor (4), and the outside of the cable core is sequentially covered with a cross-linked fluororubber elastic inner sheath (5), conductive fiber winding shielding The layer (6) and the polyurethane extruded outer sheath (7), the cross-linked fluororubber elastomer (3) and the cross-linked fluororubber elastic inner sheath (5) both include an inner cylinder and an outer cylinder The inner cylinder and the outer cylinder are evenly distributed with a plurality of connecting plates in a radial shape, and the power cord core (1) includes a power conductor (11), a cross-linked polyethylene inner insulating layer (12) and the PPS outer insulating layer (13), the control wire core (2) is formed by twisting two insulated wire cores (21), and the insulated wire core (21) includes the control conductor (211) and the FEP extrusion. Wrap insulating layer (212). 2 . The high-elasticity recovery type anti-signal crosstalk multi-core cable according to claim 1 , wherein the twisting direction of the insulated wire core ( 21 ) is the same as the twisting direction of the cable core. 3 . 3 . The multi-core cable with high elasticity recovery type anti-signal crosstalk according to claim 1 , wherein the power conductor ( 11 ) is formed by twisting a plurality of tinned copper monofilaments with a diameter of 0.05mm to 0.08mm. 4 . 4 . The multi-core cable of high elasticity recovery type anti-signal crosstalk according to claim 1 , wherein the control conductor ( 211 ) is composed of a plurality of tinned copper monofilaments with a diameter of 0.02 mm to 0.04 mm concentrically twisted. 5 . 5 . The multi-core cable with high elasticity recovery type anti-signal crosstalk according to claim 1 , wherein the drain conductor ( 3 ) is a circular conductor structure formed by twisting and pressing several soft copper wires. 6 . 6. The high-elasticity recovery type anti-signal crosstalk multi-core cable according to claim 1, wherein the outer diameter ratio of the power core (1) and the control core (2) is 1:1 to 1.15:1. 7. The multi-core cable of high elasticity recovery type anti-signal crosstalk according to claim 1, characterized in that: the outer diameter ratio of the insulated wire core (21) and the cross-linked fluororubber elastomer (3) is 1 :1 to 1.25:1. 8 . The high-elasticity recovery type anti-signal crosstalk multi-core cable according to claim 1 , wherein the conductive fiber winding shielding layer ( 6 ) is a spiral winding structure of conductive fiber bundles, and the conductive fiber bundles are of two types. 9 . Polyacrylonitrile-based carbon fibers with different wire diameters are twisted and coated with a copper conductive coating, and the wire diameters of the polyacrylonitrile-based carbon fibers do not exceed 25 μm. 9. The multi-core cable of high elasticity recovery type anti-signal crosstalk according to claim 1, characterized in that: the total thickness of the cross-linked polyethylene inner insulating layer (12) and the PPS outer insulating layer (13) is 0.2 mm to 0.5mm. 10 . The high-elasticity recovery type anti-signal crosstalk multi-core cable according to claim 1 , wherein the FEP extruded insulating layer ( 212 ) has a thickness of 0.1 mm to 0.3 mm. 11 .

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