Cable and manufacturing method

Abstract

The invention discloses a cable and a manufacturing method, and relates to the technical field of cables, the cable comprises at least one conductor core, and the cable also comprises a foaming material layer formed on the conductor core, a first aluminum foil twisted layer, a first copper woven mesh layer, a second aluminum foil twisted layer, a second copper woven mesh layer and an extrusion molding layer are sequentially arranged on the peripheral face of the foaming material layer from inside to outside, and first woven mesh holes of the first copper woven mesh layer and second woven mesh holes of the second copper woven mesh layer are distributed in a staggered mode. At least part of the extrusion molding material of the extrusion molding layer is embedded into the second woven mesh and is connected with the outer wall of the second aluminum foil stranded layer; and the profiling embedding part of the extrusion molding layer is embedded in the second woven mesh hole and is fixedly connected with the outer wall of the second aluminum foil stranded layer, so that the connection between the extrusion molding layer and the second copper woven mesh layer and the second aluminum foil stranded layer is tighter and firmer, the strength of the cable is higher, and the internal structure of the cable is stable.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and in particular to a cable and a manufacturing method thereof. Background Art

[0002] Cables are a general term for items such as optical cables and electric cables. Cables have many uses, mainly for controlling installations, connecting devices, transmitting electricity, etc., and are a common and indispensable thing in daily life.

[0003] The existing patent publication number: CN113270226B discloses an airborne flexible ultra-light shielding cable, which includes a metal conductor insulating wire located in the center, a wrapping layer arranged outside the metal conductor insulating wire, and a braided layer arranged outside the wrapping layer. A first shielding layer and a second shielding layer are arranged between the wrapping layer and the braided layer. The first shielding layer sprays metal on the wrapping layer through an electrostatic spraying process, and the second shielding layer sprays metal on the braided layer through an electrostatic spraying process. By spraying metal on the wrapping layer and the braided layer to realize the shielding layer, the weight of the current airborne cable is greatly reduced, and the weight reduction of the shielding structure compared with the common airborne cables on the market reaches 82%; at the same time, it has good stability and has great advantages compared with the prior art; when facing high and low temperature environments and high oil pollution environments, it also has good electromagnetic shielding performance.

[0004] The electrostatic spraying in the above solution plays a shielding role, and the winding and unwinding during the cable manufacturing process will cause wear, and there is still room for further improvement in terms of the shielding effect; secondly, the cable needs to be wound, unwound and towed, and the connection strength design between the layers in the above solution is not reasonable enough. When the cable is wound or installed, there is a defect that the inner layers displace relative to each other. Summary of the Invention

[0005] The present invention provides a cable and a manufacturing method thereof, which solves the technical problem that the current cable is prone to breakage.

[0006] To solve the above technical problem, a cable provided by the present invention includes at least one conductor core. The cable further includes a foaming material layer formed on the conductor core. The outer peripheral surface of the foaming material layer is provided with a first aluminum foil stranded layer, a first copper braided mesh layer, a second aluminum foil stranded layer, a second copper braided mesh layer and an extrusion layer arranged in sequence from inside to outside. The first braided mesh holes of the first copper braided mesh layer and the second braided mesh holes of the second copper braided mesh layer are arranged in a staggered manner, and at least part of the extrusion material of the extrusion layer is embedded in the second braided mesh holes and connected to the outer wall of the second aluminum foil stranded layer.

[0007] The first braided mesh holes of the first copper braided mesh layer and the second braided mesh holes of the second copper braided mesh layer are staggeredly distributed, which can form an internal and external shielding function compensation, achieve a very good shielding function with relatively few braided copper wires, reduce costs and meet the final use requirements. At least part of the extrusion material of the extrusion layer is embedded in the second braided mesh holes. At least part of the extrusion of the extrusion layer can form a certain degree of position limitation for the second copper braided mesh layer. At the same time, it is connected to the outer wall of the second aluminum foil stranded layer, which can improve the connection stability among the three, and can greatly enhance the mesh hole anti-deformation of the second braided mesh holes.

[0008] Preferably, the inner wall of the extrusion layer has a mesh-shaped embedding part that is embedded in the second braided mesh holes and fixedly connected to the outer wall of the second aluminum foil stranded layer.

[0009] Adopting the above technical solution: Since the inner wall of the extrusion layer has a mesh-shaped embedding part that is embedded in the second braided mesh holes and fixedly connected to the outer wall of the second aluminum foil stranded layer, compared with the traditional method of simply wrapping the extrusion layer on the second copper braided mesh layer, the profiling embedding part of the extrusion layer of the present application is embedded in the second braided mesh holes and fixedly connected to the outer wall of the second aluminum foil stranded layer, which can make the connection between the extrusion layer, the second copper braided mesh layer and the second aluminum foil stranded layer closer and firmer, so that the internal structure of the cable will not undergo relative displacement during the later construction of the cable, as well as in the state after traction and final installation.

[0010] Preferably, the stranding direction of the first aluminum foil stranded layer is opposite to the stranding direction of the second aluminum foil stranded layer.

[0011] Adopting the above technical solution: By having the stranding direction of the first aluminum foil stranded layer opposite to the stranding direction of the second aluminum foil stranded layer, the stability and flexibility of the internal structure of the cable are improved.

[0012] Preferably, the first aluminum foil stranded layer is formed on the outer peripheral surface of the foaming material layer by an aluminum strip according to the first stranding direction, and the second aluminum foil stranded layer is formed on the outer peripheral surface of the first copper braided mesh layer by another aluminum strip according to the second stranding direction.

[0013] Adopting the above technical solution: Since the first aluminum foil stranded layer is formed on the outer peripheral surface of the foaming material layer by an aluminum strip according to the first stranding direction, and the second aluminum foil stranded layer is formed on the outer peripheral surface of the first copper braided mesh layer by another aluminum strip according to the second stranding direction, the first aluminum foil stranded layer and the second aluminum foil stranded layer can further improve the internal electromagnetic shielding of the cable, effectively resist high-frequency electromagnetic interference, and at the same time can also prevent the displacement phenomenon between the layers.

[0014] Preferably, the inner diameter of the first copper braided mesh layer is smaller than the outer diameter of the first aluminum foil stranded layer; the inner diameter of the second copper braided mesh layer is smaller than the outer diameter of the second aluminum foil stranded layer.

[0015] The above-mentioned technical solution is adopted: the inner diameter of the first copper woven mesh layer is smaller than the outer diameter of the first aluminum foil twisted layer. The structure of the present application is that the first aluminum foil twisted layer is wrapped around the foam material layer in the circumferential direction. Then, when the inner diameter of the first copper woven mesh layer is smaller than the outer diameter of the first aluminum foil twisted layer, the first copper woven mesh layer will form a mark on the first aluminum foil twisted layer and the foam material layer, forcing the foam material layer and the first aluminum foil twisted layer to form a partial protrusion embedded in the first woven mesh hole, thereby improving the connection strength between the first copper woven mesh layer and the first aluminum foil twisted layer and the foam material layer to prevent deformation of the first woven mesh hole; the inner diameter of the second copper woven mesh layer is smaller than the outer diameter of the second aluminum foil twisted layer. Similarly, the second copper woven mesh layer will form a mark on the second aluminum foil twisted layer, forcing the second aluminum foil twisted layer to form a partial protrusion embedded in the second woven mesh hole, thereby improving the connection strength between the second copper woven mesh layer and the second aluminum foil twisted layer.

[0016] Preferably, the first copper braided mesh layer is obtained by braiding a plurality of first copper wires, and each of the first copper wires is formed by a plurality of single first copper wires arranged side by side. The first copper wires are, for example, three in a side-by-side structure, and the enameled wire is heated in such a way that the plurality of first copper wires are combined into one strand, so as to increase the coverage area, improve the shielding function, and increase the braiding strength of the first copper wires.

[0017] The above technical solution is adopted: the first copper braided mesh layer is obtained by braiding a plurality of first copper wires, and each first copper wire is formed by a plurality of single first copper wires arranged side by side, so as to improve the structural strength of the first copper braided mesh layer and thus improve the strength of the cable.

[0018] Preferably, the second copper braided mesh layer is obtained by braiding a plurality of second copper wires, and each of the second copper wires is formed by a plurality of single second copper wires arranged side by side.

[0019] The above technical solution is adopted: the second copper braided mesh layer is braided by a plurality of second copper wires, and each second copper wire is formed by a plurality of second copper wires arranged side by side, so as to improve the structural strength of the second copper braided mesh layer and thus improve the strength of the cable. Similarly, a plurality of second copper wires arranged side by side are heated and combined into one strand to increase the coverage area, improve the shielding function, and increase the braiding strength of the first copper wire.

[0020] Preferably, the outer diameter of the foam material layer is at least twice the outer diameter of the conductor core.

[0021] By adopting the above technical solution, the outer diameter of the foaming material layer is at least twice the outer diameter of the conductor core, so that the conductor core can be effectively protected.

[0022] The present application further provides a method for manufacturing a cable, and the manufacturing method includes the following steps: S1. Form a foamed material layer on the outer peripheral surface of the conductor core and shape the foamed material layer; S2. A first aluminum strip is formed on the outer peripheral surface of the foamed material layer obtained in S1 to obtain a first aluminum foil stranded layer; During the formation of the first aluminum foil stranded layer, several first-strand copper wires are woven on the outer peripheral surface of the first aluminum foil stranded layer through weaving to obtain a first copper braided mesh layer; During the weaving of the first copper braided mesh layer, another aluminum strip is formed on the outer peripheral surface of the first copper braided mesh layer to obtain a second aluminum foil stranded layer; During the formation of the second aluminum foil stranded layer, several second-strand copper wires are woven on the outer peripheral surface of the second aluminum foil stranded layer through weaving to obtain a second copper braided mesh layer; During the weaving of the second copper braided mesh layer, an extrusion layer is formed on the outer peripheral surface of the second copper braided mesh layer by extrusion, and at least part of the extrusion material of the extrusion layer is embedded in the second braided mesh holes and connected to the outer wall of the second aluminum foil stranded layer, thus obtaining the finished cable.

[0023] Preferably, the foamed material layer is a PE foamed material.

[0024] Adopting the above technical solution: Since the foamed material layer is a PE foamed material, it can have good insulation performance.

[0025] Compared with the related art, the present invention has the following beneficial effects: The first braided mesh holes of the first copper braided mesh layer and the second braided mesh holes of the second copper braided mesh layer are distributed in a staggered manner, which can form an internal and external shielding function compensation. With relatively few braided copper wires, a very good shielding function can be achieved, which can reduce costs and meet the final use requirements. At least part of the extrusion material of the extrusion layer is embedded in the second braided mesh holes. At least part of the extrusion of the extrusion layer can form a certain degree of position limitation on the second copper braided mesh layer. At the same time, being connected to the outer wall of the second aluminum foil stranded layer can improve the connection stability among the three, and can greatly enhance the mesh hole anti-deformation of the second braided mesh holes.

[0026] The first aluminum foil stranded layer and the second aluminum foil stranded layer can improve production efficiency. At the same time, they also have very good shielding performance and cable flexibility performance. By having the stranding direction of the first aluminum foil stranded layer opposite to that of the second aluminum foil stranded layer, the stability and flexibility of the internal structure of the cable are improved. The first aluminum foil stranded layer is formed on the outer peripheral surface of the foaming material layer by an aluminum strip in the first stranding direction, and the second aluminum foil stranded layer is formed on the outer peripheral surface of the first copper braided mesh layer by another aluminum strip in the second stranding direction. The first aluminum foil stranded layer and the second aluminum foil stranded layer can further improve the internal electromagnetic shielding of the cable, effectively resist high-frequency electromagnetic interference, and at the same time can also prevent the displacement phenomenon between layers.

[0027] Since the inner diameter of the first copper braided mesh layer is smaller than the outer diameter of the first aluminum foil stranded layer, in the structure of this application, the first aluminum foil stranded layer wraps around the foaming material layer in the circumferential direction. Then, when the inner diameter of the first copper braided mesh layer is smaller than the outer diameter of the first aluminum foil stranded layer, the first copper braided mesh layer will form indentations on the first aluminum foil stranded layer and the foaming material layer, forcing the foaming material layer and the first aluminum foil stranded layer to form partial protrusions that are embedded in the first braided mesh holes, thereby improving the connection strength between the first copper braided mesh layer and the first aluminum foil stranded layer and the foaming material layer to prevent the deformation of the first braided mesh holes; the inner diameter of the second copper braided mesh layer is smaller than the outer diameter of the second aluminum foil stranded layer. Similarly, the second copper braided mesh layer will form indentations on the second aluminum foil stranded layer, forcing partial protrusions to be formed on the second aluminum foil stranded layer and embedded in the second braided mesh holes, improving the connection strength between the second copper braided mesh layer and the second aluminum foil stranded layer. Brief Description of the Drawings

[0028] Figure 1 It is a schematic structural diagram of a cable; Figure 2 It is a schematic plan view of a cable; Figure 3 It is a schematic structural diagram of the first copper braided mesh layer and the second copper braided mesh layer in a cable; Figure 4 It is a schematic developed plan view of the first copper braided mesh layer and the second copper braided mesh layer in a cable; Figure 5 It is a schematic structural diagram of the first aluminum foil stranded layer and the second aluminum foil stranded layer in a cable; Figure 6 It is a schematic developed plan view of the extrusion layer in a cable; Figure 7 It is a schematic diagram of the first aluminum foil stranded layer, the first copper braided mesh layer, the second aluminum foil stranded layer, and the second copper braided mesh layer in a cable; Figure 8 It is a schematic diagram of the conductor core and the foaming material layer in a cable; Figure 9It is a schematic structural diagram of an extrusion layer embedded in a cable being connected to a second braided mesh hole and a second aluminum foil twisted layer.

[0029] Reference numerals in the figure: 1, conductor core; 2, foamed material layer; 3, first aluminum foil twisted layer; 4, first copper braided mesh layer; 41, first braided mesh hole; 42, first copper wire strand; 420, first copper wire; 5, second aluminum foil twisted layer; 6, second copper braided mesh layer; 61, second braided mesh hole; 62, second copper wire strand; 620, second copper wire; 7, extrusion layer; 71, embedded part. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0031] Embodiment 1, as Figures 1-9 shown, a cable includes at least one conductor core 1. The conductor core 1 is, for example, made of copper material, or multiple copper materials can also be used to obtain the conductor core 1 by stranding. The cable further includes a foamed material layer 2 formed on the conductor core 1. The outer peripheral surface of the foamed material layer 2 is provided with a first aluminum foil twisted layer 3, a first copper braided mesh layer 4, a second aluminum foil twisted layer 5, a second copper braided mesh layer 6, and an extrusion layer 7 arranged in sequence from the inside out. The first braided mesh hole 41 of the first copper braided mesh layer 4 and the second braided mesh hole 61 of the second copper braided mesh layer 6 are arranged in a staggered manner, and at least part of the extrusion material of the extrusion layer 7 is embedded in the second braided mesh hole 61 and is connected to the outer wall of the second aluminum foil twisted layer 5; By providing the foamed material layer 2, the first aluminum foil twisted layer 3, the first copper braided mesh layer 4, the second aluminum foil twisted layer 5, the second copper braided mesh layer 6, and the extrusion layer 7, the shielding performance can be ensured, and at the same time, the flexibility performance can also be ensured.

[0032] The first braided mesh hole 41 of the first copper braided mesh layer 4 and the second braided mesh hole 61 of the second copper braided mesh layer 6 are arranged in a staggered manner, which can further improve the anti-shielding performance.

[0033] At least part of the extrusion material of the extrusion layer 7 is embedded in the second braided mesh hole 61 and is connected to the outer wall of the second aluminum foil twisted layer 5, which can prevent the deformation of the second braided mesh hole 61. The profiling embedded part 71 of the extrusion layer 7 is embedded in the second braided mesh hole 61 and is fixedly connected to the outer wall of the second aluminum foil twisted layer 5, which can make the connection between the extrusion layer 7, the second copper braided mesh layer 6, and the second aluminum foil twisted layer 5 tighter and more firm, making the cable stronger during subsequent traction or winding, and the internal structure of the cable will not undergo relative displacement.

[0034] Example 2, as Figure 6 , Figure 9 shown, the inner wall of the extrusion layer 7 has a mesh-shaped embedding part 71 embedded in the second braided mesh holes 61 and fixedly connected to the outer wall of the second aluminum foil stranded layer 5, which can prevent the deformation of the second braided mesh holes 61. The profiling embedding part 71 of the extrusion layer 7 is embedded in the second braided mesh holes 61 and fixedly connected to the outer wall of the second aluminum foil stranded layer 5, which can make the connection between the extrusion layer 7, the second copper braided mesh layer 6 and the second aluminum foil stranded layer 5 closer and firmer. When the cable is pulled or wound later, the strength of the cable is higher, and the internal structure of the cable will not undergo relative displacement.

[0035] As Figure 5 shown, the stranding direction of the first aluminum foil stranded layer 3 is opposite to that of the second aluminum foil stranded layer 5, which improves the stability of the internal structure of the cable; for example, the first aluminum foil stranded layer 3 is stranded clockwise, while the second aluminum foil stranded layer 5 is stranded counterclockwise.

[0036] As Figure 5 shown, the first aluminum foil stranded layer 3 is formed on the outer peripheral surface of the foaming material layer 2 by an aluminum strip according to the first stranding direction, and the second aluminum foil stranded layer 5 is formed on the outer peripheral surface of the first copper braided mesh layer 4 by another aluminum strip according to the second stranding direction. The first aluminum foil stranded layer 3 and the second aluminum foil stranded layer 5 can further improve the electromagnetic shielding inside the cable and effectively resist electromagnetic interference; As Figure 1 shown, the inner diameter of the first copper braided mesh layer 4 is smaller than the outer diameter of the first aluminum foil stranded layer 3. The structure of this embodiment is that the first aluminum foil stranded layer 3 wraps around the circumferential direction of the foaming material layer 2. Then, when the inner diameter of the first copper braided mesh layer 4 is smaller than the outer diameter of the first aluminum foil stranded layer 3, the first copper braided mesh layer 4 will form a constriction mark on the first aluminum foil stranded layer 3 and the foaming material layer 2, forcing the foaming material layer 2 and the first aluminum foil stranded layer 3 to form partial protrusions embedded in the first braided mesh holes 41, thereby improving the connection strength between the first copper braided mesh layer 4, the first aluminum foil stranded layer 3 and the foaming material layer 2; the inner diameter of the second copper braided mesh layer 6 is smaller than the outer diameter of the second aluminum foil stranded layer 5. Similarly, the second copper braided mesh layer 6 will form a constriction mark on the second aluminum foil stranded layer 5, forcing partial protrusions to be formed on the second aluminum foil stranded layer 5 and embedded in the second braided mesh holes 61, improving the connection strength between the second copper braided mesh layer 6 and the second aluminum foil stranded layer 5; the above inner and outer diameter designs can prevent the corresponding braided mesh holes of the first copper braided mesh layer 4 and the second copper braided mesh layer 6 from deforming.

[0037] Secondly, the second copper braided mesh layer 6 will form a constriction mark on the second aluminum foil stranded layer 5, and the inner protrusion part of the inner surface of the second aluminum foil stranded layer 5 corresponding to its constriction mark will contact the foaming material layer 2 in the first braided mesh holes 41, so as to further improve the connection stability of the second aluminum foil stranded layer 5 in the circumferential direction and the axial direction.

[0038] As Figure 4 shown, the first copper braided mesh layer 4 is obtained by braiding a plurality of first strands of copper wire 42, and each first strand of copper wire 42 is respectively formed by a plurality of single first copper wires 420 arranged side by side, improving the structural strength of the first copper braided mesh layer 4, and further improving the stranding strength during cable braiding; the first copper wire 420 is an enameled copper wire, and two or three are stuck together side by side by heating, so as to improve the subsequent braiding efficiency and the stranding force application strength during braiding, preventing the phenomenon of breakage of the single first copper wire 420 during stranding.

[0039] As Figure 4 shown, the second copper braided mesh layer 6 is obtained by braiding a plurality of second strands of copper wire 62, and each second strand of copper wire 62 is respectively formed by a plurality of single second copper wires 620 arranged side by side, improving the structural strength of the second copper braided mesh layer 6, and further improving the strength of the cable. The second strand of copper wire 62 is an enameled copper wire, and two or three are stuck together side by side by heating, so as to improve the subsequent braiding efficiency and the stranding force application strength during braiding, preventing the phenomenon of breakage of the single second copper wire 620 during stranding.

[0040] As Figure 1 shown, the foaming material layer 2 is a PE foaming material, which can provide good insulation performance and heat insulation performance, and can also provide excellent flexibility for the cable.

[0041] In addition, the outer diameter of the foaming material layer 2 in this embodiment is at least twice the outer diameter of the conductor core 1. It provides excellent flexibility for the cable.

[0042] Embodiment 3, based on Embodiment 1 or Embodiment 2, this embodiment further provides a manufacturing method for a cable, and the manufacturing method includes the following steps: S1. Form the foaming material layer 2 on the outer peripheral surface of the conductor core 1 and shape the foaming material layer 2; S2. A first aluminum strip is formed on the outer peripheral surface of the foaming material layer 2 in S1 to obtain a first aluminum foil stranded layer 3; During the formation of the first aluminum foil stranded layer 3, a plurality of first strands of copper wire 42 are braided on the outer peripheral surface of the first aluminum foil stranded layer 3 through braiding to obtain a first copper braided mesh layer 4; During the braiding process of the first copper braided mesh layer 4, another aluminum strip is formed on the outer peripheral surface of the first copper braided mesh layer 4 to obtain a second aluminum foil stranded layer 5; During the formation of the second aluminum foil stranded layer 5, a plurality of second strands of copper wire 62 are braided on the outer peripheral surface of the second aluminum foil stranded layer 5 through braiding to obtain a second copper braided mesh layer 6; During the braiding process of the second copper braided mesh layer 6, an extrusion layer 7 is formed on the outer peripheral surface of the second copper braided mesh layer 6 by extrusion, and at least part of the extrusion material of the extrusion layer 7 is embedded in the second braided mesh holes 61 and connected to the outer wall of the second aluminum foil stranded layer 5, thus obtaining the finished cable.

[0043] By providing the foaming material layer 2, the first aluminum foil stranded layer 3, the first copper braided mesh layer 4, the second aluminum foil stranded layer 5, the second copper braided mesh layer 6 and the extrusion layer 7, the shielding performance can be ensured, and at the same time, the flexibility performance can also be ensured.

[0044] The first braided mesh holes 41 of the first copper braided mesh layer 4 and the second braided mesh holes 61 of the second copper braided mesh layer 6 are arranged in a staggered distribution, which can further improve the anti-shielding performance.

[0045] At least part of the extrusion material of the extrusion layer 7 is embedded in the second braided mesh holes 61 and connected to the outer wall of the second aluminum foil stranded layer 5, which can prevent the deformation of the second braided mesh holes 61. The profiling embedding part 71 of the extrusion layer 7 is embedded in the second braided mesh holes 61 and fixedly connected to the outer wall of the second aluminum foil stranded layer 5, which can make the connection between the extrusion layer 7, the second copper braided mesh layer 6 and the second aluminum foil stranded layer 5 closer and more firm. When the cable is towed or wound up later, the strength of the cable is higher, and the internal structure of the cable will not undergo relative displacement.

[0046] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cable, comprising at least one conductor core (1), characterized in that, The cable further comprises a foam material layer (2) formed on the conductor core (1); the outer peripheral surface of the foam material layer (2) is provided with a first aluminum foil twisted layer (3), a first copper braided mesh layer (4), a second aluminum foil twisted layer (5), a second copper braided mesh layer (6) and an extruded layer (7) which are arranged in sequence from the inside to the outside; the first braided mesh holes (41) of the first copper braided mesh layer (4) and the second braided mesh holes (61) of the second copper braided mesh layer (6) are staggered, and at least part of the extruded material of the extruded layer (7) is embedded in the second braided mesh holes (61) and connected to the outer wall of the second aluminum foil twisted layer (5).

2. The cable according to claim 1, wherein The inner wall of the extruded layer (7) comprises a mesh-shaped embedding portion (71) embedded in the second woven mesh (61) and fixedly connected to the outer wall of the second aluminum foil twisted layer (5).

3. The cable according to claim 1, characterized in that, The twisting direction of the first aluminum foil twisted layer (3) is opposite to the twisting direction of the second aluminum foil twisted layer (5).

4. The cable according to claim 1 or 3, characterized in that, The first aluminum foil twisted layer (3) is formed on the outer peripheral surface of the foam material layer (2) by an aluminum strip in a first twisting direction, and the second aluminum foil twisted layer (5) is formed on the outer peripheral surface of the first copper braided mesh layer (4) by another aluminum strip in a second twisting direction.

5. The cable according to claim 1, characterized in that, The inner diameter of the first copper braided mesh layer (4) is smaller than the outer diameter of the first aluminum foil twisted layer (3); and the inner diameter of the second copper braided mesh layer (6) is smaller than the outer diameter of the second aluminum foil twisted layer (5).

6. The cable according to claim 5, wherein, The first copper braided mesh layer (4) is obtained by braiding a plurality of first copper wires (42), and each of the first copper wires (42) is formed by a plurality of single first copper wires (420) arranged side by side.

7. The cable according to claim 5, characterized in that, The second copper braided mesh layer (6) is obtained by braiding a plurality of second copper wires (62), and each of the second copper wires (62) is formed by a plurality of single second copper wires (620) arranged side by side.

8. The cable according to claim 1, characterized in that, The outer diameter of the foamed material layer (2) is at least twice the outer diameter of the conductor core (1).

9. The manufacturing method of the cable according to any one of claims 1-8, characterized in that, The manufacturing method comprises the following steps: S1, forming a foam material layer (2) on the outer peripheral surface of the conductor core (1), and shaping the foam material layer (2); S2, an aluminum strip is formed on the outer peripheral surface of the foam material layer (2) of S1 to obtain a first aluminum foil twisted layer (3); During the forming process of the first aluminum foil twisted layer (3), a plurality of first copper wires (42) are braided on the outer peripheral surface of the first aluminum foil twisted layer (3) to obtain a first copper braided mesh layer (4); During the weaving process of the first copper braided mesh layer (4), another aluminum strip is formed on the outer peripheral surface of the first copper braided mesh layer (4) to obtain a second aluminum foil twisted layer (5); During the forming process of the second aluminum foil twisted layer (5), a plurality of second copper wires (62) are braided on the outer peripheral surface of the second aluminum foil twisted layer (5) to obtain a second copper braided mesh layer (6); During the weaving process of the second copper braided mesh layer (6), an extrusion layer (7) is formed on the outer peripheral surface of the second copper braided mesh layer (6) by an extrusion method, and at least part of the extrusion material of the extrusion layer (7) is embedded in the second braided mesh holes (61) and connected to the outer wall of the second aluminum foil stranded layer (5), thus obtaining the finished cable.

10. The manufacturing method of the cable according to claim 9, characterized in that, The foamed material layer (2) is a PE foamed material.

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