Bending-resistant flexible power cable

Abstract

The utility model provides a bending-resistant flexible power cable, which comprises a hollow outer protective layer and a plurality of leads arranged in the outer protective layer, and further comprises a braid layer, and the braid layer is positioned between the plurality of leads and the outer protective layer. The woven layer is of a net-shaped structure formed by weaving a plurality of metal wires and a plurality of elastic wires, and the elastic wires are made of non-metal materials. According to the flexible power cable, the braid layer formed by mixing and weaving the metal wires and the elastic wires is adopted, so that the weight and the cost of the flexible power cable can be reduced on the basis of ensuring the flexibility and the bending resistance of the flexible power cable.

Description

Technical Field

[0001] The utility model relates to the technical field of cable structures, in particular to a flexible power cable that is resistant to bending. Background Art

[0002] Flexible power cable is a commonly used cable, which is widely used in scenarios such as power transmission, data transmission, and communication control. Currently, commonly used flexible power cables generally include an outer protective layer (i.e., armor layer) and multiple core wires arranged in the outer protective layer. In some application scenarios, flexible power cables need to be bent, folded, twisted, etc. during use or storage. In order to improve the bending resistance of flexible power cables, some flexible power cables are provided with a metal wire braided layer (i.e., a metal braided hose). The metal wire braided layer can improve the overall flexibility of the cable and its ability to resist radial deformation, thereby enhancing the cable's anti-bending performance (for details, please refer to patents such as CN220121510U).

[0003] Currently, the commonly used metal wire braided layer is generally woven with pure metal wire (that is, the warp and weft of the metal wire braided layer are both metal wires, and the metal wires are generally tinned copper wires). Although the metal wire braided layer with this structure has good toughness and structural strength, it is relatively heavy and relatively expensive, thereby increasing the weight and cost of the flexible power cable. Utility Model Content

[0004] The purpose of the utility model is to provide a flexible power cable that is resistant to bending. The braided layer is made of a mixture of metal wires and elastic wires. While ensuring the flexibility and bending resistance of the flexible power cable, its weight and cost can be reduced.

[0005] The utility model provides a flexible power cable that is resistant to bending, comprising a hollow outer protective layer and a plurality of conductors arranged in the outer protective layer. The flexible power cable that is resistant to bending also includes a braided layer, which is located between the plurality of conductors and the outer protective layer; the braided layer is a mesh structure woven by a plurality of metal wires and a plurality of elastic wires, and the elastic wires are made of non-metallic material.

[0006] In one feasible manner, in the braided layer, multiple metal wires extend along the first direction, and multiple metal wires are arranged at intervals along the second direction; multiple elastic wires extend along the second direction, and multiple elastic wires are arranged at intervals along the first direction; multiple metal wires and multiple elastic wires are interwoven to form a mesh structure; wherein the first direction and the second direction are perpendicular to each other.

[0007] In a feasible manner, the spacing between adjacent elastic wires is 0.5 mm to 5 mm, and the spacing between adjacent metal wires is 0.5 mm to 5 mm.

[0008] In one achievable manner, the woven layer has a plurality of meshes, and the mesh number of the meshes is 5-50.

[0009] In one achievable manner, the metal wires and the elastic wires are fixed at their interwoven locations by bonding with an adhesive.

[0010] In one achievable manner, the diameter of the metal wire is 0.5 mm to 2 mm, and the diameter of the elastic wire is 1 mm to 3 mm.

[0011] In one achievable manner, the diameter of the elastic wire is greater than or equal to the diameter of the metal wire.

[0012] In one feasible manner, the elastic wire is made of organic cotton, aramid, nylon or polypropylene; and the metal wire is tinned copper wire.

[0013] In one achievable manner, a flexible central tube is provided at a central position within the outer protective layer, and a plurality of the conductive wires are evenly arranged in a circumferential direction around the flexible central tube.

[0014] In one practicable manner, a steel wire is embedded in the center of the flexible central tube.

[0015] In one achievable manner, the bending-resistant flexible power cable further includes an insulating layer, the insulating layer is wrapped around the outside of the plurality of the conductive wires, and the braided layer is located between the insulating layer and the outer protective layer.

[0016] The utility model provides a flexible power cable that is resistant to bending. By setting a braided layer, the braided layer can improve the overall flexibility and ability to resist radial deformation of the flexible power cable, thereby enhancing the bending resistance of the flexible power cable. Moreover, the braided layer can avoid or slow down the electromagnetic interference of external signals on the internal wires, thereby ensuring the stability of signal transmission by the wires in the cable.

[0017] At the same time, the braided layer is a mesh structure mixed with metal wires and elastic wires. On the one hand, since the weight and cost of the elastic wires are lower than those of the metal wires, the braided layer is lighter and less expensive than the existing metal wire braided layer woven with pure metal wires. On the other hand, since the braided layer is a mesh structure, there are gaps between the wires of the braided layer, which reduces the setting density of the metal wires and elastic wires, thereby further reducing the weight and cost of the braided layer, and thus reducing the weight and cost of the flexible power cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the cross section of the bending-resistant flexible power cable in the embodiment of the present invention.

[0019] Figure 2 Schematic diagram of the structure of the braided layer in an embodiment of the present invention.

[0020] Figure 3 Schematic diagram of the cross section of a bending-resistant flexible power cable in another embodiment of the present invention. DETAILED DESCRIPTION

[0021] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] The terms "first", "second", "third", "fourth" and so on (if any) in the description and claims of the present invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0023] The directional terms "up," "down," "left," "right," "front," "back," "top," and "bottom" (if any) used in the specification and claims of this utility model are defined by the positions of the structures in the drawings and the positions of the structures relative to each other, and are intended only for clarity and convenience in expressing the technical solution. It should be understood that the use of directional terms should not limit the scope of protection claimed in this utility model.

[0024] like Figure 1 and Figure 2 As shown, the bending-resistant flexible power cable provided by the embodiment of the present invention includes a hollow outer protective layer 1 and a plurality of wires 4 (generally at least three) arranged in the outer protective layer 1, and the (cross) cross section of the outer protective layer 1 is annular. The bending-resistant flexible power cable also includes a braided layer 2, the (cross) cross section of the braided layer 2 is annular, the braided layer 2 is arranged on (sleeved on) the outside of the plurality of wires 4, and the braided layer 2 is located between the plurality of wires 4 and the outer protective layer 1. The braided layer 2 is a mesh structure woven by a plurality of metal wires 21 and a plurality of elastic wires 22, and the elastic wires 22 are made of non-metallic material. The outer protective layer 1, the braided layer 2 and the wires 4 all extend along the length direction of the flexible power cable.

[0025] The utility model provides a flexible power cable that is resistant to bending. By setting a braided layer 2, the braided layer 2 can improve the overall flexibility and ability to resist radial deformation of the flexible power cable, thereby enhancing the bending resistance of the flexible power cable. Moreover, the braided layer 2 can avoid or slow down the electromagnetic interference of external signals on the internal wires 4, thereby ensuring the stability of the signal transmission of each wire 4 in the cable (because the braided layer 2 is provided with a metal wire 21 and the braided layer 2 is a tubular structure, the braided layer 2 has a certain anti-electromagnetic interference function; the specific principle can refer to the existing anti-electromagnetic interference principle of the metal wire braided layer, which will not be repeated here).

[0026] At the same time, the braided layer 2 is a mesh structure formed by a mixture of metal wires 21 and elastic wires 22 (that is, the elastic wires 22 replace part of the original metal wires). On the one hand, since the weight and cost of the elastic wires 22 are lower than those of the metal wires 21, the braided layer 2 is lighter and has lower cost than the existing metal wire braided layer woven with pure metal wires; on the other hand, since the braided layer 2 is a mesh structure, there are gaps between the wires of the braided layer 2 (that is, the wires in the braided layer 2 are not densely arranged, and there are multiple mesh holes 20 on the braided layer 2), which reduces the setting density of the metal wires 21 and the elastic wires 22, thereby further reducing the weight and cost of the braided layer 2, and thus reducing the weight and cost of the flexible power cable.

[0027] like Figure 2 As shown, as an embodiment, in the braided layer 2, multiple metal wires 21 extend along a first direction Y and are spaced apart along a second direction X; multiple elastic wires 22 extend along the second direction X and are spaced apart along the first direction Y; the multiple metal wires 21 and the multiple elastic wires 22 are interwoven to form a mesh structure (interwoven means interwoven between the wires, i.e., each metal wire 21 interweaves and intersperses between the multiple elastic wires 22, and each elastic wire 22 interweaves and intersperses between the multiple metal wires 21); wherein the first direction Y and the second direction X are perpendicular to each other. The braided layer 2 can be woven from the multiple metal wires 21 and the multiple elastic wires 22 using a plain weave, a twill weave, or other methods. This arrangement simplifies the weaving of the braided layer 2 and ensures the braided layer 2's resistance to radial and axial deformation.

[0028] Of course, in other embodiments, the plurality of metal wires 21 and the plurality of elastic wires 22 may be arranged and woven in other ways. For example, along the first direction Y, the plurality of metal wires 21 and the plurality of elastic wires 22 are alternately arranged; along the second direction X, the plurality of metal wires 21 and the plurality of elastic wires 22 are alternately arranged.

[0029] like Figure 1 and Figure 2As shown in the figure, as an embodiment, the first direction Y forms a 45° angle with the axial direction of the outer protective layer 1, and the second direction X forms a 45° angle with the axial direction of the outer protective layer 1. Of course, in other embodiments, the first direction Y may also be parallel to the axial direction of the outer protective layer 1, in which case the second direction X is parallel to the circumferential direction of the outer protective layer 1; or the second direction X may be parallel to the axial direction of the outer protective layer 1, in which case the first direction Y is parallel to the circumferential direction of the outer protective layer 1.

[0030] like Figure 2 As shown, as an embodiment, the spacing between adjacent elastic wires 22 is 0.5mm to 5mm, and the spacing between adjacent metal wires 21 is 0.5mm to 5mm. Preferably, the spacing between adjacent elastic wires 22 is 1mm to 3mm, and the spacing between adjacent metal wires 21 is 1mm to 3mm.

[0031] like Figure 2 As shown, as an embodiment, the braided layer 2 has a plurality of meshes 20, and the mesh number of the meshes 20 is 5-50.

[0032] As an embodiment, the metal wires 21 and the elastic wires 22 are bonded and fixed at their interwoven positions by an adhesive (not shown), so that the metal wires 21 and the elastic wires 22 can be further fixed, thereby further improving the structural strength of the braided layer 2.

[0033] Specifically, during the production process, after the metal wires 21 and the elastic wires 22 are woven into a mesh-shaped woven layer 2, the woven layer 2 can be immersed in an adhesive solution, and then the woven layer 2 is centrifuged to remove the adhesive solution in the mesh 20 of the woven layer 2 (i.e., there is no adhesive in the mesh 20 of the woven layer 2 at the end, so as to reduce the weight of the woven layer 2 and ensure the original flexibility of the woven layer 2), while the adhesive solution at the interwoven position of the metal wires 21 and the elastic wires 22 still exists; and then the woven layer 2 is cured (for example, dried) to cure the adhesive solution at the interwoven position of the metal wires 21 and the elastic wires 22, thereby bonding and fixing the interwoven positions of the metal wires 21 and the elastic wires 22 with the adhesive.

[0034] As an embodiment, the diameter of the metal wire 21 is 0.5 mm to 2 mm, and the diameter of the elastic wire 22 is 1 mm to 3 mm.

[0035] As an embodiment, the diameter of the elastic wire 22 is greater than or equal to the diameter of the metal wire 21. Since the structural strength of the elastic wire 22 is weaker than that of the metal wire 21, setting the diameter of the elastic wire 22 larger (especially when the diameter of the elastic wire 22 is larger than the diameter of the metal wire 21) can make the elastic wire 22 have better structural strength, thereby improving the structural strength of the braided layer 2.

[0036] As an embodiment, the elastic thread 22 is made of organic cotton, aramid, nylon or polypropylene; of course, the elastic thread 22 can also be made of other non-metallic elastic materials.

[0037] In one embodiment, the metal wire 21 is a tinned copper wire. Tinned copper wire is a copper wire coated with a layer of tin to improve its corrosion resistance and oxidation resistance. Therefore, the tinned copper wire not only has good flexibility, but also has good corrosion resistance and oxidation resistance. Of course, the metal wire 21 can also be made of other metal materials (such as stainless steel).

[0038] like Figure 1 As shown, as an embodiment, the bend-resistant flexible power cable further includes an insulating layer 3 having a circular (cross) cross-section. The insulating layer 3 wraps around the plurality of conductors 4, and the braided layer 2 is located between the insulating layer 3 and the outer protective layer 1. The insulating layer 3 can wrap and secure the plurality of conductors 4, preventing them from shifting. Furthermore, the insulating layer 3 can enhance the structural strength of the flexible power cable, and even if the outer protective layer 1 is worn through, the insulating layer 3 can still provide insulation and protection for the conductors 4.

[0039] like Figure 1 As shown, as an embodiment, multiple wires 4 are arranged closely together within the insulating layer 3. The wires 4 include an insulating sheath 41 and a conductor 42 disposed within the insulating sheath 41. The conductors 42 may be one or more and may be copper wires, aluminum wires, or the like. The insulating sheath 41 has a circular cross-section.

[0040] like Figure 3 As shown, as another embodiment, a flexible central tube 5 is provided at the center of the outer protective layer 1, and a plurality of conductors 4 are evenly arranged in the circumferential direction around the flexible central tube 5, and adjacent conductors 4 are arranged close to each other. By providing the flexible central tube 5, on the one hand, the flexible central tube 5 can further enhance the structural strength of the flexible power cable; on the other hand, because the plurality of conductors 4 are arranged around the flexible central tube 5, when the flexible power cable is bent, folded, or twisted, the conductors 4 are deformed (the conductors 4 will deform when bent), and the flexible central tube 5 can absorb the extrusion force generated by the deformation of the conductors 4, thereby preventing the conductors 4 from being damaged.

[0041] like Figure 3 As shown in the figure, as an embodiment, a steel wire 51 is embedded in the center of the flexible central tube 5 (the flexible central tube 5 is a solid structure), and the steel wire 51 extends along the length of the flexible central tube 5. By providing the steel wire 51 in the flexible central tube 5, the toughness of the flexible central tube 5 can be improved, thereby further enhancing the structural strength and bending resistance of the flexible power cable.

[0042] In one embodiment, the outer protective layer 1 is made of rubber. The insulating layer 3 and the insulating sheath 41 can be made of insulating materials such as polyurethane, polyester, polyesterimide, and polyamideimide. The flexible central tube 5 can be made of foam, thermoplastic elastomer, or the like.

[0043] The bending-resistant flexible power cable provided by the embodiment of the present invention has a braided layer 2, which can improve the overall flexibility and ability to resist radial deformation of the flexible power cable, thereby enhancing the bending resistance of the flexible power cable. Moreover, the braided layer 2 can avoid or reduce the electromagnetic interference of external signals on the internal wires 4, thereby ensuring the stability of the signal transmission of each wire 4 in the cable.

[0044] At the same time, the braided layer 2 is a mesh structure formed by a mixture of metal wires 21 and elastic wires 22. On the one hand, since the weight and cost of the elastic wires 22 are lower than those of the metal wires 21, the braided layer 2 is lighter and has lower cost than the existing metal wire braided layer woven with pure metal wires; on the other hand, since the braided layer 2 is a mesh structure, there are gaps between the wires of the braided layer 2, which reduces the setting density of the metal wires 21 and the elastic wires 22, thereby further reducing the weight and cost of the braided layer 2, and thus reducing the weight and cost of the flexible power cable.

[0045] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A flexible power cable resistant to bending, comprising a hollow outer protective layer (1) and a plurality of conductors (4) arranged in the outer protective layer (1), characterized in that: The bending-resistant flexible power cable further comprises a braided layer (2), wherein the braided layer (2) is located between the plurality of conductors (4) and the outer protective layer (1); the braided layer (2) is a mesh structure woven from a plurality of metal wires (21) and a plurality of elastic wires (22), wherein the elastic wires (22) are made of a non-metallic material.

2. The bending-resistant flexible power cable according to claim 1, characterized in that: In the braided layer (2), the plurality of metal wires (21) extend along a first direction (Y), and the plurality of metal wires (21) are arranged at intervals along a second direction (X); the plurality of elastic wires (22) extend along the second direction (X), and the plurality of elastic wires (22) are arranged at intervals along the first direction (Y); the plurality of metal wires (21) and the plurality of elastic wires (22) are interwoven to form a mesh structure; wherein the first direction (Y) and the second direction (X) are perpendicular to each other.

3. The bending-resistant flexible power cable according to claim 2, characterized in that: The spacing between adjacent elastic wires (22) is 0.5 mm to 5 mm, and the spacing between adjacent metal wires (21) is 0.5 mm to 5 mm.

4. The bending-resistant flexible power cable according to claim 2, characterized in that: The metal wire (21) and the elastic wire (22) are bonded and fixed at the interwoven positions by an adhesive.

5. The bending-resistant flexible power cable according to claim 1, characterized in that: The diameter of the metal wire (21) is 0.5 mm to 2 mm, and the diameter of the elastic wire (22) is 1 mm to 3 mm.

6. The bending-resistant flexible power cable according to claim 1, characterized in that: The diameter of the elastic wire (22) is greater than or equal to the diameter of the metal wire (21).

7. The bending-resistant flexible power cable according to claim 1, characterized in that: The elastic wire (22) is made of organic cotton, aramid, nylon or polypropylene; and the metal wire (21) is tinned copper wire.

8. The bending-resistant flexible power cable according to claim 1, characterized in that: A flexible central tube (5) is provided at the center of the outer protective layer (1), and a plurality of the conductive wires (4) are evenly arranged in a circumferential direction around the flexible central tube (5).

9. The bending-resistant flexible power cable according to claim 8, characterized in that: A steel wire (51) is embedded in the center of the flexible central tube (5).

10. The bending-resistant flexible power cable according to any one of claims 1 to 9, characterized in that: The bending-resistant flexible power cable further comprises an insulating layer (3), wherein the insulating layer (3) is wrapped around the outside of the plurality of conductive wires (4), and the braided layer (2) is located between the insulating layer (3) and the outer protective layer (1).

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