High-shielding anti-crosstalk multi-core cable

Abstract

The utility model discloses a high-shielding anti-crosstalk multi-core cable which comprises three insulating core wires, two of the three insulating core wires are twisted in pairs to form a first cable core, a first aluminum-plastic composite belt is wrapped on the first cable core, the insulating core wires which are not cabled and the first cable core are twisted to form a second cable core, a first tinned copper wire braided belt is braided on the second cable core, and a second tinned copper wire braided belt is braided on the second tinned copper wire braided belt. A first drain wire is arranged between the first aluminum-plastic composite belt and the first tinned copper wire woven belt, an inner sheath is extruded on the first tinned copper wire woven belt, a second aluminum-plastic composite belt is wound on the inner sheath, a second tinned copper wire woven belt is woven on the second aluminum-plastic composite belt, and a second drain wire is arranged between the first tinned copper wire woven belt and the second tinned copper wire woven belt. A second drain wire is arranged between the second aluminum-plastic composite belt and the second tinned copper wire woven belt, and an outer sheath is extruded on the second tinned copper wire woven belt. The cable has the advantages that external electromagnetic interference can be effectively resisted, electromagnetic crosstalk among the internal insulating core wires can be reduced, and signal transmission quality and stability are improved.

Description

Technical Field

[0001] The utility model relates to the field of cables, in particular to a high-shielding anti-crosstalk multi-core cable. Background Art

[0002] At present, the general structure of cables on the market is to twist multiple insulated core wires together and then set a shielding layer. Such a structure can resist external electromagnetic interference. However, after multiple insulated core wires are twisted together, although the electromagnetic waves in each insulated core wire cancel each other out, due to the large number of insulated core wires, the electromagnetic waves radiated from each insulated core wire cannot be completely canceled out. Therefore, the electromagnetic waves of each insulated core wire will be superimposed on each other in space, increasing the possibility of crosstalk and electromagnetic interference, which will reduce the signal transmission quality and stability of the cable. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a high-shielding anti-crosstalk multi-core cable, which can not only resist external electromagnetic interference but also reduce the electromagnetic crosstalk between internal insulated core wires.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a high-shielding anti-crosstalk multi-core cable, including: three insulated core wires, two of the three insulated core wires are twisted into a first cable core, a first aluminum-plastic composite tape is wound around the first cable core, the insulated core wire that is not cabled is twisted with the first cable core into a second cable core, a first tinned copper wire braid is woven on the second cable core, a first drainage wire is arranged between the first aluminum-plastic composite tape and the first tinned copper wire braid, an inner sheath is extruded on the first tinned copper wire braid, a second aluminum-plastic composite tape is wound around the inner sheath, a second tinned copper wire braid is woven on the second aluminum-plastic composite tape, a second drainage wire is arranged between the second aluminum-plastic composite tape and the second tinned copper wire braid, and an outer sheath is extruded on the second tinned copper wire braid.

[0005] Further, for the above-mentioned high-shielding anti-crosstalk multi-core cable, the insulated core wire includes: an insulating layer and a conductor. The outer diameter of the insulating layer is 1.6 ± 0.1 mm, the average wall thickness of the insulating layer is 0.23 ± 0.05 mm, the thinnest wall thickness of the insulating layer is 0.18 ± 0.05 mm, the conductor is composed of multiple tinned copper wires with a wire diameter of 0.16 ± 0.008 mm twisted together, and the stranded outer diameter of the conductor is 0.94 mm.

[0006] Further, for the above-mentioned high-shielding anti-crosstalk multi-core cable, the insulating layer, the inner sheath and the outer sheath are all made of environmentally friendly PVC materials.

[0007] Further, for the above-mentioned high-shielding anti-crosstalk multi-core cable, the wall thickness of the inner sheath is 0.55 ± 0.05 mm, and the wall thickness of the outer sheath is 0.7 ± 0.05 mm.

[0008] Furthermore, for the aforementioned high-shielding anti-crosstalk multi-core cable, the first tinned copper wire braid is woven from multiple tinned copper wires with a wire diameter of 0.1 ± 0.008 mm, the second tinned copper wire braid is woven from tinned copper wires with a wire diameter of 0.12 ± 0.008 mm, and the braiding density of both the first tinned copper wire braid and the second tinned copper wire braid is ≥ 75%.

[0009] Furthermore, for the aforementioned high-shielding anti-crosstalk multi-core cable, the lay lengths of the first core and the second core are different.

[0010] The advantages of the present utility model are as follows: Twisting two insulated core wires into the first core can cancel out the electromagnetic waves between the two insulated cores through the twisting structure, thereby reducing the electromagnetic crosstalk between the two insulated core wires. Wrapping the first aluminum-plastic composite tape around the first core can improve the anti-interference performance between the first core and the unformed insulated core wires, thereby effectively reducing the electromagnetic crosstalk between the three insulated core wires. After twisting the unformed insulated core wires and the first core into the second core, weaving the first tinned copper wire braid and arranging the first row of drainage lines between the first tinned copper wire braid and the first aluminum-plastic composite tape can improve the shielding performance of the second core. Additionally, a composite shielding layer composed of a second aluminum-plastic composite tape, a second tinned copper wire braid, and a second row of drainage lines is provided on the inner sheath to further improve the shielding performance of the entire cable; the insulating layer, the inner sheath, and the outer sheath are all made of environmentally friendly PVC materials, which can meet environmental protection requirements during production and use and reduce the harm to the human body and the environment. Description of the Drawings

[0011] Figure 1 is a schematic structural diagram of the high-shielding anti-crosstalk multi-core cable described in the present utility model. Detailed Embodiments

[0012] The technical solution of the present utility model will be further described below in conjunction with the drawings and preferred embodiments.

[0013] As Figure 1As shown in the figure, the high-shielding anti-crosstalk multi-core cable of the present utility model includes: three insulated core wires 1. The insulated core wire 1 includes: an insulating layer 11 and a conductor 12. The conductor 12 is stranded by multiple tinned copper wires with a wire diameter of 0.16 ± 0.008 mm. The stranded outer diameter of the conductor 12 is 0.94 mm. The average wall thickness of the insulating layer 11 is 0.23 ± 0.05 mm, and the thinnest wall thickness of the insulating layer 11 is 0.18 ± 0.05 mm. The wall thickness of the insulating layer 11 is the nearest wall thickness value obtained according to the stranded outer diameter of the conductor 12 by the regulations of international standard organizations such as the International Electrotechnical Commission (IEC). It can not only ensure that the insulating layer 11 has the withstand voltage ability to avoid breakdown and leakage, but also will not be too thick to affect the flexibility of the insulated core wire 1. The insulating layer 11 is made of environmentally friendly PVC material. The insulating layer 11 made of environmentally friendly PVC material can effectively prevent moisture and moisture from invading the conductor 12. Moreover, compared with other materials, the environmentally friendly PVC material uses non-toxic or low-toxic plasticizers and stabilizers, reducing the emission of toxic gases during the production and processing process, protecting the safety of workers, and also will not emit toxic and harmful substances during use, meeting the environmental protection requirements and protecting the safety of users.

[0014] Two of the three insulated core wires 1 are twisted into a first cable core. After the two insulated core wires 1 are twisted, the electromagnetic waves radiated from the two insulated core wires 1 will cancel each other out one by one, thus reducing the electromagnetic crosstalk between the two insulated core wires 1. A first aluminum-plastic composite tape 2 is wound around the first cable core. The unformed insulated core wire 2 is twisted with the first cable core to form a second cable core. After the two insulated core wires 1 are twisted into the first cable core, the anti-interference ability of the two insulated core wires 1 can be enhanced, the signal transmission stability can be enhanced, and it is suitable for long-distance transmission. Wrapping the first aluminum-plastic composite tape 2 around the first cable core can improve the signal shielding ability between the two insulated core wires 1 in the first cable core and the unformed insulated core wire 1, preventing signal crosstalk between the first cable core and the unformed insulated core wire 1. The lay lengths of the first cable core and the second cable core are different. The design of different lay lengths can make the stress on each part of the cable more uniform when the cable is bent, thus reducing deformation and damage, improving flexibility, and moreover, the mechanical stresses borne by each part during bending will be different. This dispersion effect helps to improve the overall stability of the cable. A first tinned copper wire braid 3 made of multiple tinned copper wires with a wire diameter of 0.1 ± 0.008 mm is braided on the second cable core. The braiding density of the first tinned copper wire braid 3 is ≥ 75%. The first tinned copper wire braid 3 can improve the anti-interference ability of the insulated core wire 1 twisted with the first cable core in the second cable core. A first drain wire 4 is arranged between the first aluminum-plastic composite tape 2 and the first tinned copper wire braid 3. The first drain wire 4 can enhance the connectivity between the first aluminum-plastic composite tape 2 and the first tinned copper wire braid 3, thus improving the overall shielding effect.

[0015] An inner sheath 5 made of environment-friendly PVC material is extruded on the first tinned copper wire braided tape 3. The environment-friendly PVC has certain water absorption performance, which can effectively prevent moisture and dampness from invading the inside of the cable. Moreover, the inner sheath 5 also provides additional physical protection, enabling it to withstand various mechanical stresses during installation and use. The wall thickness of the inner sheath 5 is 0.55 ± 0.05 mm, which can provide protection without affecting the flexibility of the cable. A second aluminum-plastic composite tape 6 is wound around the inner sheath 5. A second tinned copper wire braided tape 7 woven from multiple tinned copper wires with a wire diameter of 0.12 ± 0.008 mm is woven on the second aluminum-plastic composite tape 6. The braiding density of the second tinned copper wire braided tape 7 is ≥ 75%. A second row of streamlines 8 is arranged between the second aluminum-plastic composite tape 6 and the second tinned copper wire braided tape 7. The composite shielding layer composed of the second aluminum-plastic composite tape 6, the second tinned copper wire braided tape 7 and the second row of streamlines 8 can further improve the anti-interference performance of the whole cable. When the second tinned copper wire braided tape 7 is woven and covered, it will squeeze the second row of streamlines 8. After being squeezed, the second row of streamlines 8 will sink inward towards the inner sheath 5, and the second row of streamlines 8 will drive the second aluminum-plastic composite tape 6 in contact with it to sink into the inner sheath 5 together, which can ensure the roundness of both the second tinned copper wire braided tape 7 and the second row of streamlines 8, and prevent the second row of streamlines 8 from being pressed and deformed, resulting in a reduction in the conductive area and affecting the connectivity between the second aluminum-plastic composite tape 6 and the second tinned copper wire braided tape 7, leading to a deterioration of the shielding effect. An outer sheath 9 made of environment-friendly PVC material is extruded on the second tinned copper wire braided tape 7. The wall thickness of the outer sheath 9 is 0.7 ± 0.05 mm.

[0016] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the specific implementation manners of the present invention can still be modified or equivalently replaced, and any modification or equivalent replacement without departing from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.

Claims

1. High-shielding anti-crosstalk multi-core cable, characterized in that: Including: Three insulated core wires, two of the three insulated core wires are twisted into a first cable core, a first aluminum-plastic composite tape is wound around the first cable core, the non-cabled insulated core wire is twisted with the first cable core to form a second cable core, a first tinned copper wire braid is woven on the second cable core, a first drain wire is arranged between the first aluminum-plastic composite tape and the first tinned copper wire braid, an inner sheath is extruded on the first tinned copper wire braid, a second aluminum-plastic composite tape is wound around the inner sheath, a second tinned copper wire braid is woven on the second aluminum-plastic composite tape, a second drain wire is arranged between the second aluminum-plastic composite tape and the second tinned copper wire braid, and an outer sheath is extruded on the second tinned copper wire braid.

2. The high-shielding anti-crosstalk multi-core cable according to claim 1, wherein: The insulated core wire includes: an insulating layer and a conductor. The outer diameter of the insulating layer is 1.6 ± 0.1 mm, the average wall thickness of the insulating layer is 0.23 ± 0.05 mm, the thinnest wall thickness of the insulating layer is 0.18 ± 0.05 mm, the conductor is stranded by multiple tinned copper wires with a wire diameter of 0.16 ± 0.008 mm, and the stranded outer diameter of the conductor is 0.94 mm.

3. The multi-core cable with high shielding and anti-crosstalk according to claim 2, wherein: The insulating layer, the inner sheath and the outer sheath are all made of environmentally friendly PVC materials.

4. The high-shielding anti-crosstalk multi-core cable according to claim 1, wherein: The wall thickness of the inner sheath is 0.55 ± 0.05 mm, and the wall thickness of the outer sheath is 0.7 ± 0.05 mm.

5. The high-shielding anti-crosstalk multi-core cable according to claim 1, characterized in that: The first tinned copper wire braid is woven by multiple tinned copper wires with a wire diameter of 0.1 ± 0.008 mm, the second tinned copper wire braid is woven by tinned copper wires with a wire diameter of 0.12 ± 0.008 mm, and the braiding density of the first tinned copper wire braid and the second tinned copper wire braid is ≥ 75%.

6. The high-shielding anti-crosstalk multi-core cable according to claim 1, wherein: The stranding pitches of the first cable core and the second cable core are different.

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