Anti-torsion cable

Abstract

According to the anti-torsion cable provided by the invention, due to the unbalanced weaving mode, the torsion force borne by the woven mesh during torsion can be buffered, the cable can keep good conduction under the condition of long-time torsion, and the outer conductor wound in the same direction is good in toughness, high in strength and capable of bearing various winding and buckling; the metal foil outer conductor is wrapped by the unbalanced braided outer conductor or the same-direction winding outer conductor, so that the whole cable can play a buffering role during torsion, and the cable can keep good conduction under the condition of long-time torsion, so that the unbalanced braided outer conductor or the same-direction winding outer conductor is wrapped outside the metal foil outer conductor; therefore, the durability, the flexibility and the mechanical strength of axial torsion of the cable can be improved, the fatigue service life of the braided wires is prolonged, the electrical performance can be further improved, the direct current resistance of the outer conductor is reduced, the attenuation of the cable is reduced, electromagnetic waves in the cable are effectively shielded, and generation and reception of interference signals are prevented; and the influence of electromagnetic interference of the cable on the external environment is prevented, so that the shielding effect is enhanced.

Description

Technical Field

[0001] The present application relates to the field of communication transmission technology, and in particular to a torsion-resistant cable. Background Art

[0002] With the development of smart cars, car companies are increasing the use of rotatable central control screens, so the durability requirements for cable axial torsion have also increased. Currently, there are regulations that clearly define the durability requirement of 100,000 times, as follows:

[0003] 1) Durability cycle requirements: 20,000 times at extreme temperature & 100,000 times at room temperature;

[0004] 2) One cycle: ① Low temperature -40℃, 5000 times, ② High temperature 125℃, 5000 times, ③ Normal temperature, 50,000 times, 2 cycles;

[0005] 3) Rotation parameters: One cycle 5S: rotate from the origin to +110° and then return to the origin for 1.75S, pause time 1.5S, rotate from the origin to -110° and then return to the origin for 1.75S.

[0006] 4) During the entire durability process, the conductors and insulation of the moving parts of the harness must be visually intact, the internal metal wires must be intact, the cable mid-circuit conductivity must be 100%, and there must be no short circuit, wrong circuit, or open circuit; the change in contact resistance must be greater than 7Ω for no more than 1μs.

[0007] At present, the existing coaxial cables mainly adopt a symmetrical braiding method. When the coaxial cables under this method are axially twisted, the braided mesh is subjected to a large torsional force, which is prone to wire breakage, resulting in a relatively short service life of the braided outer conductor. The wire will break or break instantly after being twisted about 10,000 to 30,000 times. Utility Model Content

[0008] The purpose of the present application is to solve at least one of the above-mentioned technical defects, especially the technical defect that the axial torsion durability of the coaxial cable in the prior art is poor, resulting in a relatively short service life of the braided outer conductor.

[0009] The present application provides a torsion-resistant cable, the torsion-resistant cable comprising a twisted metal inner conductor, an insulating layer, a metal foil outer conductor, an unbalanced braided outer conductor or a co-directionally wound outer conductor, and a sheath;

[0010] Among them, the insulating layer is coated on the outside of the twisted metal inner conductor, the metal foil outer conductor is overlapped on the outside of the insulating layer, the unbalanced braided outer conductor is braided and coated on the outside of the metal foil outer conductor, or the co-directionally wound outer conductor is wound and coated on the outside of the metal foil outer conductor, and the sheath is coated on the unbalanced braided outer conductor or the co-directionally wound outer conductor.

[0011] Optionally, the twisted metal inner conductor is a multi-layer twisted wire structure formed by twisting multiple metal wires into a core.

[0012] Optionally, the multi-layer twisted wire structure comprises an inner twisted layer and at least one outer twisted layer;

[0013] The inner twisted layer is composed of a single metal wire, and at least one outer twisted layer is formed by twisting a plurality of metal wires.

[0014] Optionally, when the outer twisted layer has multiple layers, the number of metal wires in each outer twisted layer increases in multiples from the inside to the outside.

[0015] Optionally, the wire diameter of each metal wire in the twisted metal inner conductor is the same.

[0016] Optionally, each metal wire in the twisted metal inner conductor is a hard copper-clad steel wire with a conductivity of 40H.

[0017] Optionally, the insulating layer is a solid structure or a foamed structure.

[0018] Optionally, the insulating layer is made of insulating materials of different temperature grades according to different ambient temperatures.

[0019] Optionally, the metal foil outer conductor is overlapped outside the insulating layer using a self-adhesive or non-self-adhesive aluminum-plastic composite shielding foil.

[0020] Optionally, the thickness of the self-adhesive aluminum-plastic composite shielding foil is 0.05 to 0.09 mm;

[0021] The thickness of the non-self-adhesive aluminum-plastic composite shielding foil is 0.03-0.05 mm.

[0022] Optionally, the metal foil outer conductor is a longitudinal seam tubular structure.

[0023] Optionally, the longitudinal seam tubular structure is longitudinally overlapped outside the insulating layer, and the longitudinal overlap rate is not less than 18%.

[0024] Optionally, the unbalanced braided outer conductor or the co-directionally wound outer conductor uses metal braided wires with a mechanical strength higher than a preset strength threshold.

[0025] Optionally, the metal braided wire is an alloy metal braided wire.

[0026] Optionally, the unbalanced braided outer conductor is braided by a braiding machine with different numbers of braiding wires in the upper spindle and the lower spindle.

[0027] Optionally, the multiple of the number of unbalanced braiding roots of the upper spindle and the lower spindle is not less than 2 times.

[0028] Optionally, the co-directionally wound outer conductor is a plurality of metal wires wound in a spiral manner in the same direction and coated outside the metal foil outer conductor.

[0029] Optionally, the number of metal wire strands wound in the same direction around the outer conductor is 1 to 10 strands.

[0030] Optionally, the sheath is a thermoplastic elastomer sheath material.

[0031] It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

[0032] The present application provides a torsion-resistant cable, which includes a twisted metal inner conductor, an insulating layer, a metal foil outer conductor, an unbalanced braided outer conductor or a co-directionally wound outer conductor, and a sheath; wherein the insulating layer is coated on the outside of the twisted metal inner conductor, the metal foil outer conductor is overlapped on the outside of the insulating layer, the unbalanced braided outer conductor is braided and coated on the outside of the metal foil outer conductor, or the co-directionally wound outer conductor is wound and coated on the outside of the metal foil outer conductor, and the sheath is coated on the unbalanced braided outer conductor or the co-directionally wound outer conductor; since the unbalanced braiding method can buffer the torsional force exerted on the braided net during torsion, the cable can maintain good conduction under long-term torsion, and the co-directionally wound outer conductor has good toughness and high strength and can withstand Various windings and bends can ensure that the cable as a whole acts as a buffer when twisted, so that the cable can maintain good conductivity even when twisted for a long time. Therefore, the present application wraps the unbalanced braided outer conductor or the same-direction wound outer conductor on the outside of the metal foil outer conductor. This can not only improve the durability, flexibility and mechanical strength of the cable's axial torsion, increase the fatigue service life of the braided wire, and meet the durability requirements of 100,000 times or more, but also further improve the electrical performance, reduce the DC resistance of the outer conductor, reduce cable attenuation, and effectively shield the electromagnetic waves inside the cable, prevent the generation and reception of interference signals, and prevent the cable from affecting the external environment's electromagnetic interference, thereby enhancing the shielding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0034] Figure 1 A schematic diagram of the cable structure of the unbalanced braided outer conductor 4 provided in an embodiment of the present application;

[0035] Figure 2 A schematic diagram of a cable structure with a co-directionally wound outer conductor 4 provided in an embodiment of the present application;

[0036] Figure 3 A schematic diagram of the structure of a 7-strand twisted metal wire conductor provided in an embodiment of the present application;

[0037] Figure 4 Schematic diagram of the structure of a 19-strand twisted metal wire conductor provided in an embodiment of the present application. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] At present, the existing coaxial cables mainly adopt a symmetrical braiding method. When the coaxial cables under this method are axially twisted, the braided mesh is subjected to a large torsional force, which is prone to wire breakage, resulting in a relatively short service life of the braided outer conductor. The wire will break or break instantly after being twisted about 10,000 to 30,000 times.

[0040] Based on this, the present application proposes the following technical solutions, which are detailed below:

[0041] In one embodiment, the present application provides a torsion-resistant cable, which includes a twisted metal inner conductor 1, an insulating layer 2, a metal foil outer conductor 3, an unbalanced braided outer conductor 4 or a co-directionally wound outer conductor 4, and a sheath 5.

[0042] Among them, the insulating layer 2 is coated on the outside of the twisted metal inner conductor 1, the metal foil outer conductor 3 is overlapped on the outside of the insulating layer 2, the unbalanced braided outer conductor 4 is braided and coated on the outside of the metal foil outer conductor 3, or the co-directionally wound outer conductor 4 is wound and coated on the outside of the metal foil outer conductor 3, and the sheath 5 is coated on the unbalanced braided outer conductor 4 or the co-directionally wound outer conductor 4.

[0043] In this embodiment, the torsion-resistant cable has a multi-layer structure, which comprises, from the inside to the outside, a twisted metal inner conductor 1, an insulating layer 2, a metal foil outer conductor 3, an unbalanced braided outer conductor 4 or a co-directionally wound outer conductor 4, and a sheath 5. That is, the torsion-resistant cable of the present application can be a cable structure consisting of a twisted metal inner conductor 1, an insulating layer 2, a metal foil outer conductor 3, an unbalanced braided outer conductor 4 and a sheath 5, or a cable structure consisting of a twisted metal inner conductor 1, an insulating layer 2, a metal foil outer conductor 3, a co-directionally wound outer conductor 4 and a sheath 5. The unbalanced braided outer conductor 4 or the co-directionally wound outer conductor 4 can be selected depending on the actual situation, and there is no limitation here.

[0044] Furthermore, if Figure 1 As shown, Figure 1 A schematic diagram of the cable structure of the unbalanced braided outer conductor 4 provided in the embodiment of the present application; when the anti-torsion cable of the present application is composed of a twisted metal inner conductor 1, an insulating layer 2, a metal foil outer conductor 3, an unbalanced braided outer conductor 4 and a sheath 5, the present application can cover the insulating layer 2 outside the twisted metal inner conductor 1, overlap the metal foil outer conductor 3 outside the insulating layer 2, braid the unbalanced braided outer conductor 4 outside the metal foil outer conductor 3, and cover the sheath 5 outside the unbalanced braided outer conductor 4. In this way, the torsional force of the braided mesh during torsion can be buffered by an unbalanced braiding method, so that the cable can maintain good conduction under long-term torsion.

[0045] like Figure 2 As shown, Figure 2 A schematic diagram of the cable structure of the co-directionally wound outer conductor 4 provided in the embodiment of the present application; when the anti-torsion cable of the present application is composed of a twisted metal inner conductor 1, an insulating layer 2, a metal foil outer conductor 3, a co-directionally wound outer conductor 4 and a sheath 5, the present application can wrap the insulating layer 2 outside the twisted metal inner conductor 1, the metal foil outer conductor 3 is overlapped outside the insulating layer 2, the co-directionally wound outer conductor 4 is wrapped around the metal foil outer conductor 3, and the sheath 5 is wrapped around the co-directionally wound outer conductor 4. The co-directionally wound outer conductor 4 has good toughness and high strength, and can withstand various windings and bucklings, ensuring that the cable as a whole plays a buffering role when twisted, thereby allowing the cable to maintain good conduction under long-term twisting.

[0046] In the above embodiment, the torsion-resistant cable includes a twisted metal inner conductor 1, an insulating layer 2, a metal foil outer conductor 3, an unbalanced braided outer conductor 4 or a co-directionally wound outer conductor 4, and a sheath 5; wherein the insulating layer 2 is coated on the outside of the twisted metal inner conductor 1, the metal foil outer conductor 3 is overlapped on the outside of the insulating layer 2, the unbalanced braided outer conductor 4 is braided and coated on the outside of the metal foil outer conductor 3, or the co-directionally wound outer conductor 4 is wound and coated on the outside of the metal foil outer conductor 3, and the sheath 5 is coated on the unbalanced braided outer conductor 4 or the co-directionally wound outer conductor 4; since the unbalanced braiding method can buffer the torsional force exerted on the braided net during torsion, the cable can maintain good conduction under long-term torsion, and the co-directionally wound outer conductor 4 has good toughness and high strength. It can withstand various windings and bendings, and can ensure that the cable as a whole plays a buffering role when twisted, so that the cable can maintain good conductivity even when twisted for a long time. Therefore, the present application wraps the unbalanced braided outer conductor 4 or the same-direction wound outer conductor 4 on the outside of the metal foil outer conductor 3. This can not only improve the durability, flexibility and mechanical strength of the cable's axial torsion, increase the fatigue service life of the braided wire, and meet the durability requirements of 100,000 times or more, but also further improve the electrical performance, reduce the DC resistance of the outer conductor, reduce cable attenuation, and effectively shield the electromagnetic waves inside the cable, prevent the generation and reception of interference signals, and prevent the cable from affecting the electromagnetic interference of the external environment, thereby enhancing the shielding effect.

[0047] In one embodiment, the twisted metal inner conductor 1 is a multi-layer twisted wire structure formed by twisting multiple metal wires into a core.

[0048] In this embodiment, the twisted metal inner conductor 1 can adopt a co-core twisted wire structure, in which each metal wire has its own unique position, so that the structure is regular and rounded, which can ensure the continuity of high-speed wire release during insulation extrusion. In addition, after multiple metal wires are twisted together, the toughness and mechanical strength of the twisted metal inner conductor 1 can also be improved.

[0049] In one embodiment, the multi-layer twisted wire structure includes an inner twisted layer and at least one outer twisted layer; wherein the inner twisted layer is composed of a single metal wire, and the at least one outer twisted layer is formed by twisting a plurality of metal wires.

[0050] In this embodiment, when the twisted metal inner conductor 1 is a multi-layer twisted wire structure, the multi-layer twisted wire structure can be composed of at least two layers of twisted wire structure, wherein the inner twisted layer can be composed of a single metal wire, and at least one outer twisted layer can be formed by twisting multiple metal wires. This can make its structure regular and round, and can also ensure the high-speed wire pay-off continuity during insulation extrusion.

[0051] In one embodiment, when the outer twisted layer has multiple layers, the number of metal wires in each outer twisted layer increases in multiples from the inside to the outside.

[0052] In this embodiment, the twisted metal inner conductor 1 may be a multi-layer twisted wire structure, which may be composed of an inner twisted layer and at least one outer twisted layer. When the outer twisted layer is multi-layered, the number of metal wires in each outer twisted layer may be increased in multiples from the inside to the outside.

[0053] Indicatively, Figure 3 , 4 As shown, Figure 3 This is a schematic diagram of the structure of a 7-strand twisted metal wire conductor provided in an embodiment of the present application. Figure 4 A schematic diagram of a 19-strand twisted metal wire conductor structure provided in an embodiment of the present application; Figure 3 , Figure 4 It can be seen that the structure of the twisted metal inner conductor 1 of the present application can be 7 strands twisted = 1+6, 19 strands twisted = 1+6+12, 37 strands twisted = 1+6+12+18, etc. With each additional outer twisted layer, the number of metal wires of the outer twisted layer and the adjacent outer twisted layer close to the inner twisted layer increases exponentially, and each layer of single wires is twisted with one metal wire as the center of the circle, so that the cross-section of the twisted wire is very round.

[0054] In one embodiment, the wire diameter of each metal wire in the twisted metal inner conductor 1 is the same.

[0055] In this embodiment, when the twisted metal inner conductor 1 is a multi-layer twisted wire structure formed by twisting multiple metal wires with the same core, the wire diameter of each metal wire in the twisted metal inner conductor 1 can be set to be the same. This can make the cross-section of the twisted wire very round and ensure the continuity of high-speed wire release during insulation extrusion.

[0056] In one embodiment, each metal wire in the twisted metal inner conductor 1 is made of hard copper-clad steel wire with a conductivity of 40H, which can achieve higher toughness and meet the application requirements of a dynamic working environment.

[0057] In one embodiment, the insulating layer 2 is a solid structure or a foamed structure, which can be selected according to the actual working environment and is not limited here.

[0058] In one embodiment, the insulating layer 2 is made of insulating materials with different temperature grades according to different ambient temperatures, such as PE, PP or XLPE. The specific selection can be made according to the actual working environment and is not limited here.

[0059] In one embodiment, the metal foil outer conductor 3 is overlapped outside the insulating layer 2 using a self-adhesive or non-self-adhesive aluminum-plastic composite shielding foil, which can prevent the leakage of electromagnetic waves and play an anti-interference shielding role.

[0060] In one embodiment, the thickness of the self-adhesive aluminum-plastic composite shielding foil is 0.05-0.09 mm. The specific thickness can be set according to the actual working environment and is not limited here.

[0061] The thickness of the non-self-adhesive aluminum-plastic composite shielding foil is 0.03-0.05 mm. The specific thickness can be set according to the actual working environment and is not limited here.

[0062] In one embodiment, the metal foil outer conductor 3 is a longitudinally seamed tubular structure, which can reduce the weight and improve the elasticity of the cable.

[0063] In one embodiment, the longitudinal seam tubular structure is longitudinally overlapped outside the insulating layer 2, and the longitudinal overlap rate is not less than 18%, which can prevent the leakage of electromagnetic waves and play an anti-interference shielding role.

[0064] In one embodiment, the unbalanced braided outer conductor 4 or the co-directionally wound outer conductor 4 uses a metal braided wire with a mechanical strength higher than a preset strength threshold. The metal braided wire with high mechanical strength has high tensile strength and excellent torsional resistance, and is therefore better suitable for the torsion-resistant cable of the present application.

[0065] In one embodiment, the metal braided wire is an alloy metal braided wire, which can increase the fatigue service life of the braided wire.

[0066] In one embodiment, the unbalanced braided outer conductor 4 is braided by a braiding machine with different numbers of braiding wires in the upper spindle and the lower spindle.

[0067] In this embodiment, the unbalanced braided structure of the unbalanced braided outer conductor 4 is caused by the different number of braided wires between the upper spindle and the lower spindle of the braiding machine. For example: a 16-spindle braiding machine (divided into 12 upper spindles and 12 lower spindles) adopts a braiding method of 12x7 upper spindles + 12x1 lower spindles, or 12x6 upper spindles + 12x2 lower spindles (instead of the traditional braiding method of 12x4 upper spindles + 12x4 lower spindles), that is, 12 upper spindles are 6 to 7 braided wires, and 12 lower spindles are 1 to 2 braided wires.

[0068] Furthermore, the present application can set the number of braiding wires of the upper spindle and the lower spindle according to actual conditions. Preferably, the number of braiding wires of the upper spindle of the present application can be 5 to 10, and the number of braiding wires of the lower spindle can be 1 to 3. The unbalanced weaving method can buffer the torsional force exerted on the braided mesh during twisting, allowing the cable to maintain good conductivity when twisted for a long time.

[0069] In one embodiment, the multiple of the unbalanced braiding root number of the upper spindle and the lower spindle is not less than 2 times, which can further buffer the torsional force exerted on the braided mesh when the cable is twisted, allowing the cable to maintain better conductivity when twisted for a long time.

[0070] In one embodiment, the co-directionally wound outer conductor 4 is a plurality of metal wires wound in a spiral manner in the same direction and wrapped around the metal foil outer conductor 3. Since the co-directionally wound outer conductor 4 has good toughness and high strength, it can withstand various windings and bending, thereby ensuring that the cable as a whole plays a buffering role when twisted, and can also enable the cable to maintain good conduction when twisted for a long time.

[0071] In one embodiment, the number of metal wire strands of the co-directionally wound outer conductor 4 is 1 to 10, and each metal wire strand has high mechanical strength to increase the fatigue service life of the braided outer conductor and improve torsional resistance.

[0072] In one embodiment, the sheath 5 is a thermoplastic elastomer sheath 5 material.

[0073] In this embodiment, the sheath 5 is extruded and coated on the unbalanced braided outer conductor 4 or the co-directionally wound outer conductor 4, which further protects the cable from mechanical damage and environmental influences such as torsion. In addition, the sheath 5 of the present application can be made of a soft, tough and wear-resistant thermoplastic elastomer sheath 5 material.

[0074] Preferably, the sheath 5 of the present application can be made of elastomeric sheath 5 materials such as TPE or TPU, which have excellent fatigue resistance and temperature resistance, high resilience, and high load-bearing capacity, and are therefore suitable for applications in high-frequency flexure and anti-torsion occasions.

[0075] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0076] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The various embodiments can be combined as needed, and the same or similar parts can refer to each other.

[0077] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A torsion-resistant cable, characterized in that: The torsion-resistant cable comprises a twisted metal inner conductor, an insulating layer, a metal foil outer conductor, an unbalanced braided outer conductor or a co-directionally wound outer conductor, and a sheath; Among them, the insulating layer is coated on the outside of the twisted metal inner conductor, the metal foil outer conductor is overlapped on the outside of the insulating layer, the unbalanced braided outer conductor is braided and coated on the outside of the metal foil outer conductor, or the co-directionally wound outer conductor is wound and coated on the outside of the metal foil outer conductor, and the sheath is coated on the unbalanced braided outer conductor or the co-directionally wound outer conductor.

2. The torsion-resistant cable according to claim 1, characterized in that: The twisted metal inner conductor is a multi-layer twisted wire structure formed by twisting a plurality of metal wires into a core.

3. The torsion-resistant cable according to claim 2, characterized in that: The multi-layer twisted wire structure comprises an inner twisted layer and at least one outer twisted layer; The inner twisted layer is composed of a single metal wire, and at least one outer twisted layer is formed by twisting a plurality of metal wires.

4. The torsion-resistant cable according to claim 3, characterized in that: When the outer twisted layer has multiple layers, the number of metal wires in each outer twisted layer increases in multiples from the inside to the outside.

5. The torsion-resistant cable according to any one of claims 2 to 4, characterized in that: The wire diameter of each metal wire in the twisted metal inner conductor is the same.

6. The torsion-resistant cable according to any one of claims 2 to 4, characterized in that: Each metal wire in the twisted metal inner conductor is a hard copper-clad steel wire with a conductivity of 40H.

7. The torsion-resistant cable according to claim 1, characterized in that: The insulating layer is a solid structure or a foamed structure.

8. The torsion-resistant cable according to claim 1 or 7, characterized in that: The insulating layer uses insulating materials of different temperature grades according to different ambient temperatures.

9. The torsion-resistant cable according to claim 1, characterized in that: The metal foil outer conductor is overlapped outside the insulating layer by a self-adhesive or non-self-adhesive aluminum-plastic composite shielding foil.

10. The torsion-resistant cable according to claim 9, characterized in that: The thickness of the self-adhesive aluminum-plastic composite shielding foil is 0.05 to 0.09 mm; The thickness of the non-self-adhesive aluminum-plastic composite shielding foil is 0.03-0.05 mm.

11. The torsion-resistant cable according to claim 1, 9 or 10, characterized in that: The metal foil outer conductor is a longitudinal seam tubular structure.

12. The torsion-resistant cable according to claim 11, characterized in that The longitudinal seam tubular structure is longitudinally overlapped outside the insulating layer, and the longitudinal overlap rate is not less than 18%.

13. The torsion-resistant cable according to claim 1, characterized in that: The unbalanced braided outer conductor or the co-directionally wound outer conductor uses metal braided wires with a mechanical strength higher than a preset strength threshold.

14. The torsion-resistant cable according to claim 13, characterized in that The metal braided wire is an alloy metal braided wire.

15. The torsion-resistant cable according to claim 1, 13 or 14, characterized in that: The unbalanced braided outer conductor is braided by a braiding machine with different numbers of braiding wires of the upper spindle and the lower spindle.

16. The torsion-resistant cable according to claim 15, characterized in that The multiple of the unbalanced braiding number of the upper spindle and the lower spindle is not less than 2 times.

17. The torsion-resistant cable according to claim 1, 13 or 14, characterized in that: The co-directionally wound outer conductor is a plurality of metal wires wound in a spiral manner in the same direction and coated outside the metal foil outer conductor.

18. The torsion-resistant cable according to claim 17, characterized in that The number of the metal wire strands wound in the same direction around the outer conductor is 1 to 10 strands.

19. The torsion-resistant cable according to claim 1, characterized in that: The sheath is made of thermoplastic elastomer sheath material.

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