Parallel structure cable and cable group

Abstract

The utility model relates to the field of cable structures, in particular to a parallel structure cable and a cable group, the parallel structure cable comprises an insulating wire pair, the insulating wire pair comprises two conductors distributed in parallel and insulating layers wrapping the two conductors respectively, each conductor is formed by twisting one or more wires, the outer side of the insulating wire pair is wrapped by an inner protective layer, and the inner protective layer is wrapped by an outer protective layer. A gap is formed between the inner protective layer and the insulated wire pair, an elastic anti-bending part is arranged in the gap, two sides of the elastic anti-bending part are respectively abutted against the outer surfaces of the two insulated layers, and an outer protective layer is wrapped on the outer side of the inner protective layer. The conductors in the cable are arranged to be of a parallel structure, interference and noise can be effectively reduced, the signal transmission quality can be effectively improved, the signal transmission distance can be effectively increased, in the signal transmission process, induced current generated by the conductors can be conducted to the ground through the ground wire, and therefore the electromagnetic interference of the conductors is weakened, and the signal transmission effect is improved.

Description

Technical Field

[0001] The present application relates to the technical field of cable structures, and in particular to a parallel structure cable and a cable group. Background Art

[0002] Cables play an important role in information transmission, data communication, radio communication and other fields. With the continuous development of science and technology in modern society, the data that cables need to transmit is becoming more and more massive, and the transmission efficiency of cables is required to be higher and higher. However, the existing cable structure often has unsatisfactory effects when transmitting high-frequency signals, has large interference, and cannot meet the increasingly complex working environment and work requirements. Utility Model Content

[0003] In order to reduce the interference generated by the outside world and the cable itself during signal transmission and improve the efficiency and quality of signal transmission, the present application provides a parallel structure cable and a cable group.

[0004] On the one hand, the present application provides a parallel structure cable adopting the following technical solution:

[0005] The present application provides a parallel structure cable, comprising an insulated wire pair, wherein the insulated wire pair comprises two conductors distributed in parallel, and an insulating layer respectively covering the two conductors, wherein the conductor is formed by twisting one or more wires, an inner sheath is wrapped around the outer side of the insulated wire pair, a gap is formed between the inner sheath and the insulated wire pair, an elastic anti-bending portion is arranged in the gap, two sides of the elastic anti-bending portion are respectively in contact with the outer surfaces of the two insulating layers, and an outer sheath is wrapped around the outer side of the inner sheath.

[0006] By adopting the above technical solution, two parallel conductors are arranged in the cable. When a positive voltage is applied to one conductor, a negative voltage is applied to the adjacent conductor, thereby forming a differential signal. This differential signal can effectively reduce interference and noise, and improve signal quality and transmission distance. The setting of the elastic anti-bending part can improve the overall structural strength of the cable and improve the impact resistance of the cable.

[0007] Optionally, the outer protective layer includes a metal belt and a hot-melt Mylar layer wrapped around the outer circumference of the metal belt, and the shapes of the metal belt and the hot-melt Mylar layer are adapted to the shape of the inner protective layer.

[0008] By adopting the above technical solution, the metal tape and the hot-melt Mylar layer work together to provide protection for the inner sheath and the insulated wire pairs, and provide a better shielding effect for the cable, which can effectively prevent interference from external signals and improve the stability of the cable when transmitting large amounts of information.

[0009] Optionally, the inner protective layer is a foamed or non-foamed PTFE tape, and the inner protective layer includes two arc segments and two straight segments. The two arc segments are relatively distributed and cooperatively arranged on both sides of the two insulating layers. The two straight segments are arranged between the two arc segments and connected to the ends of the arc segments. The elastic anti-bending portion is formed on the opposite side of the two straight segments.

[0010] By adopting the above technical solution, the PTFE tape has good waterproof, high temperature and chemical resistance, and can improve the stability of the insulated wire pair coated in the inner sheath.

[0011] Optionally, a ground wire is inserted between the inner sheath and the outer sheath, and the ground wire is parallel to the conductor.

[0012] By adopting the above technical solution, the setting of the ground wire can guide the induced current generated during the signal transmission process into the ground, reducing electromagnetic interference and improving the signal transmission effect.

[0013] Optionally, there is one ground wire, which is arranged on the center line of the center connection line of the two conductors.

[0014] By adopting the above technical solution, a ground wire is set between two conductors. When the two conductors are transmitting data, the electromagnetic interference generated by the two conductors can be absorbed at the same time, and the electromagnetic noise can be quickly grounded, which can reduce the error rate of signal transmission and improve the quality of signal transmission.

[0015] Optionally, two ground wires are provided, and the two ground wires are respectively provided on both sides of the two conductors and are located on a straight line where a center connection line of the two conductors is located.

[0016] By adopting the above technical solution, the two wires are respectively used to absorb the electromagnetic interference generated when the two conductors transmit signals, which can further improve the quality of signal transmission.

[0017] Optionally, the insulating layer is made of one or more materials selected from the group consisting of polyethylene, polypropylene, foamed polyethylene or fluororesin.

[0018] By adopting the above technical solution, the insulating layer made of the above material can provide protection for the conductor during current transmission, prevent current leakage and external interference, thereby ensuring the normal operation and safe use of the cable.

[0019] On the other hand, the present application also provides a cable group, including multiple parallel structural cables, which are twisted together, and also includes an outer sheath wrapped around the outside of the multiple twisted parallel structural cables, and a filling layer is formed between the outer sheath and the parallel structural cables.

[0020] By adopting the above technical solution, multiple parallel structure cables are twisted together, which can improve data transmission efficiency and reduce space occupancy. The outer sheath and the filling layer are arranged together to provide protection for the twisted multiple parallel structure cables and reduce external interference.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. By setting the conductors in the cable into a parallel structure, interference and noise can be effectively reduced, and the signal transmission quality and transmission distance can be improved. During the signal transmission process, the induced current generated by the conductor can be conducted to the earth through the ground wire, thereby reducing the electromagnetic interference of the conductor itself and improving the signal transmission effect. Through the coordinated setting of the metal belt and the hot-melt Mylar layer, the external signal can be shielded, thereby reducing the interference of the external signal on the conductor and further improving the signal transmission effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the front cross-sectional structure of a parallel structure cable according to an embodiment of the present application.

[0024] Figure 2 It is a schematic diagram of the front cross-sectional structure of the parallel structure cable according to the second embodiment of the present application.

[0025] Figure 3 It is a schematic diagram of the front cross-sectional structure of the parallel structure cable of Example 3 of the present application.

[0026] Figure 4 The present invention is a schematic diagram of the front cross-sectional structure of the cable group.

[0027] Figure numerals: 1. insulated wire pair; 11. conductor; 12. insulating layer; 2. inner sheath; 21. arc segment; 22. straight line segment; 3. elastic anti-bending portion; 4. outer sheath; 41. metal tape; 42. hot-melt Mylar layer; 5. ground wire; 6. outer sheath; 7. filling layer. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-4 This application is described in further detail.

[0029] Embodiment 1

[0030] The present application embodiment discloses a parallel structure cable. Figure 1 A parallel structure cable includes an insulated wire pair 1, an inner sheath 2 wrapped around the outside of the insulated wire pair 1, and an outer sheath 4 wrapped around the outside of the inner sheath 2. Current is transmitted in the insulated wire pair 1. The inner sheath 2 and the outer sheath 4 are used to provide protection for the insulated wire pair 1 to prevent current leakage and avoid external electromagnetic interference.

[0031] The insulated wire pair 1 includes two conductors 11 arranged in parallel on the left and right sides. Each conductor 11 is formed by twisting one or more wires. The wires can be made of materials with excellent conductive properties such as copper wires or silver wires. The insulated wire pair 1 also includes an insulating layer 12 coated on the outside of the conductor 11. The insulating layer 12 is made of one or more materials selected from polyethylene, polypropylene, foamed polyethylene or fluororesin to prevent current leakage and ensure the normal operation of the cable.

[0032] By setting the conductor 11 as a structure formed by twisting multiple wires, not only can the flexibility of the cable be improved, but also the curvature during bending is not concentrated together, but distributed on each wire. The smaller the diameter of each wire, the smaller the bending stress generated during bending. Therefore, plastic deformation will not occur under the condition of the allowable bending radius, so that the insulation layer 12 of the cable will not be damaged. In addition, each wire can slide between each other during bending, and each layer is twisted in opposite directions, so that the tension and pressure on the inside and outside of the conductor 11 are decomposed. According to the specific material of the wire and the use requirements, the multiple wires can adopt one of the three twisting forms: regular concentric single wire twisting, regular concentric stranded wire twisting and irregular single wire twisting.

[0033] Reference Figure 1 The two insulating layers 12 respectively covering the two conductors 11 are in contact with each other and are put together. Both insulating layers 12 are cylindrical structures. The inner sheath 2 includes an arc segment 21 which is adapted to the arc shape of one side away from the two insulating layers 12, and a straight line segment 22 connecting the ends of the two arc segments 21, thereby forming a waist-shaped hole structure for accommodating the insulated wire pair 1 in the inner sheath 2, and the mating surfaces of the insulating layer 12 and the arc segment 21 are in contact with each other.

[0034] Preferably, the inner protective layer 2 is made of foamed or non-foamed PTFE tape (i.e., polytetrafluoroethylene cable wrapping tape, also known as polytetrafluoroethylene low-density film tape, etc.), which is made of polytetrafluoroethylene dispersion resin and has a special fibrous microporous structure. It is mainly used to protect the insulating layer 12 from damage, play a role of buffering and cushioning, and during the use of the cable, it plays different roles such as heat insulation, corrosion protection, and anti-aging for the cable insulation layer 12.

[0035] Furthermore, an elastic anti-bending part 3 is provided on the side of the inner sheath 2 facing the insulating wire pair 1. Two elastic anti-bending parts 3 are provided and are respectively located on the opposite sides of the two straight line segments 22. The outer surfaces of the two insulating layers 12 of the above-mentioned insulating wire pair 1 are both in contact with the elastic anti-bending part 3, thereby improving the overall structural strength of the cable and improving the impact resistance of the cable. It should be noted that in order to ensure that the relative positions of the internal conductor 11 and the insulator of the cable remain unchanged, prevent external substances from entering the cable, and enhance the mechanical strength and toughness of the cable, it is necessary to fill a material in the space formed between the two insulating layers 12 and the inner sheath 2. This material may be polyethylene, polypropylene, foamed polyethylene, etc.

[0036] Furthermore, the outer sheath 4 wrapped around the outer side of the inner sheath 2 includes a metal belt 41, which can be a copper belt or an aluminum belt, etc., and mainly plays a shielding role to prevent the influence of external electromagnetic interference on the signal and ensure the transmission quality of the signal. Secondly, it can also improve the mechanical strength and corrosion resistance of the cable, increase the tensile strength and compressive resistance of the cable, and extend the service life of the cable. The outer sheath 4 also includes 1-2 layers of hot-melt Mylar layer 42 coated on the outer surface of the metal belt 41. The hot-melt Mylar layer 42 can be aluminum foil Mylar, which can be tightly coated on the surface of the metal belt 41 after hot melting, and can further improve the shielding performance of the cable.

[0037] Embodiment 2

[0038] Reference Figure 2 The other structures of the second embodiment are the same as those of the first embodiment, except that a ground wire 5 is arranged between the inner sheath 2 and the outer sheath 4, the ground wire 5 is parallel to the two conductors 11, and is located on the center line of the center connecting line of the two conductors 11, that is, between the two conductors 11. When the cable is working, the induced current generated by the two conductors 11 can be introduced into the ground through the ground wire 5, thereby reducing electromagnetic interference.

[0039] Embodiment 3

[0040] Reference Figure 3 The other structures of the third embodiment are the same as those of the first embodiment, except that two ground wires 5 are arranged between the inner sheath 2 and the outer sheath 4, the two ground wires 5 are parallel to the two conductors 11, the two ground wires 5 are arranged on the side away from the two conductors 11, and the two ground wires 5 are located on the straight line where the center connecting line of the two conductors 11 is located. When the cable is working, the two ground wires 5 can act simultaneously to guide the induced current, further reduce electromagnetic interference, and improve the signal transmission quality.

[0041] The present application also provides a cable set, referring to Figure 4, including a plurality of parallel structure cables twisted together, and an outer sheath 6 covering the outer sides of the plurality of parallel structure cables, a filling layer 7 is formed between the outer sheath 6 and the parallel structure cables, and the outer sheath 6 and the filling layer 7 are used to protect the parallel structure cables inside. The material of the outer sheath 6 is preferably PVC material, and the filling layer 7 is preferably mineral filling material.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A parallel structure cable, comprising an insulated wire pair (1), characterized in that: The insulated wire pair (1) comprises two conductors (11) arranged in parallel, and two insulating layers (12) respectively covering the two conductors (11); the conductors (11) are formed by twisting one or more wires; an inner sheath (2) is wrapped around the outer side of the insulated wire pair (1); a gap is formed between the inner sheath (2) and the insulated wire pair (1); an elastic anti-bending portion (3) is provided in the gap; two sides of the elastic anti-bending portion (3) are respectively in contact with the outer surfaces of the two insulating layers (12); and an outer sheath (4) is wrapped around the outer side of the inner sheath (2).

2. A parallel structure cable according to claim 1, characterized in that: The outer protective layer (4) comprises a metal belt (41) and a hot-melt Mylar layer (42) wrapped around the outer circumference of the metal belt (41); the shapes of the metal belt (41) and the hot-melt Mylar layer (42) are both compatible with the shape of the inner protective layer (2).

3. A parallel structure cable according to claim 1, characterized in that: The inner protective layer (2) is a foamed or non-foamed PTFE tape, and comprises two arc segments (21) and two straight segments (22). The two arc segments (21) are relatively distributed and matched to be arranged on both sides of the two insulating layers (12). The two straight segments (22) are arranged between the two arc segments (21) and connected to the ends of the arc segments (21). The elastic anti-bending portion (3) is formed on the opposite side of the two straight segments (22).

4. A parallel structure cable according to claim 1, characterized in that: A ground wire (5) is inserted between the inner sheath (2) and the outer sheath (4), and the ground wire (5) is parallel to the conductor (11).

5. A parallel structure cable according to claim 4, characterized in that: One ground wire (5) is provided, and the ground wire (5) is provided on the center line of the center connection line of the two conductors (11).

6. A parallel structure cable according to claim 4, characterized in that: Two ground wires (5) are provided, and the two ground wires (5) are respectively provided on both sides of the two conductors (11) and are located on a straight line where a central connecting line of the two conductors (11) is located.

7. A cable assembly, characterized in that: The invention comprises a plurality of parallel structural cables as claimed in any one of claims 1 to 6, wherein the plurality of parallel structural cables are twisted together, and further comprises an outer sheath (6) wrapped around the outer sides of the plurality of parallel structural cables twisted together, wherein a filling layer (7) is formed between the outer sheath (6) and the parallel structural cables.

Images