Cable for power transmission

Abstract

The invention discloses a cable for power transmission, which relates to the technical field of cable manufacturing and structurally comprises a cable core assembly, an inner insulating layer, a shielding layer, an outer insulating layer and an outer protective layer from inside to outside in sequence. In the cable core assembly, a core wire sleeve is arranged outside a conductive core wire, and a copper conductor is wound in a spiral twisting groove outside the sleeve; a spiral supporting framework and an elastic buffer layer are arranged outside the inner insulating layer; reinforcing fiber bundles are arranged in the shielding layer; and the outer insulating layer and the outer protective layer are protected layer by layer. The cable realizes performance optimization by virtue of a unique structure and a unique material: electrical conduction stability and electromagnetic shielding are ensured; physically, the material has compression resistance, tensile resistance, wear resistance and impact resistance; through the heat dissipation and protection design, the device can stably operate in a complex environment, improves the power transmission reliability, reduces the maintenance cost, and is suitable for various power transmission scenes.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable manufacturing, in particular to a power transmission cable. BACKGROUND

[0002] With the rapid development of the power industry, traditional power transmission cables are difficult to meet the demand for long-term stable and efficient power transmission in complex environments due to their simple structure. In terms of electrical performance, the insulation layer of ordinary cables is prone to aging at high temperatures, resulting in a decrease in insulation performance and potential safety hazards. In a strong electromagnetic environment, ordinary cables are susceptible to electromagnetic interference, leading to unstable power transmission.

[0003] In terms of physical performance, the outer sheath is prone to wear and tear due to external forces such as friction and extrusion during laying and use, which can damage the insulation of the cable and potentially cause electrical accidents. During long-term high-load operation, internal heat cannot be effectively dissipated, resulting in an increase in temperature that not only reduces transmission efficiency but also accelerates the aging of internal materials and shortens the service life of the cable. These problems seriously restrict the reliability and stability of power transmission, Therefore, there is an urgent need for a new type of power transmission cable with a more complex structure and superior performance that can effectively solve the above problems and its manufacturing method. SUMMARY

[0004] The present application aims to solve the problem of traditional power transmission cables in the prior art, which are difficult to meet the demand for long-term stable and efficient power transmission in complex environments due to their simple structure, and proposes a power transmission cable.

[0005] To solve the problems existing in the prior art, the present application adopts the following technical solutions: A power transmission cable, which comprises a cable core assembly, an inner insulation layer, a shielding layer, an outer insulation layer, and an outer protective layer from inside to outside. The cable core assembly comprises a conductive core wire, a core wire sleeve, and a plurality of copper conductors. The outer surface of the conductive core wire is sleeved with the core wire sleeve, and the outer surface of the core wire sleeve is provided with a plurality of circularly distributed spiral twisting grooves. Each spiral twisting groove is internally wound with a spiral copper conductor. The inner insulation layer is coated on the outside of the core wire sleeve, and its outer surface is fixed with a plurality of circularly distributed spiral support skeletons. An elastic buffer layer is filled between adjacent pairs of spiral support skeletons. The shielding layer is coated on the outside of the inner insulation layer, and its inner surface is provided with a plurality of U-shaped slots. Each U-shaped slot is internally fixed with a bundle of reinforcing fibers. The outer insulation layer is coated on the outside of the shielding layer, and the outer protective layer is coated on the outside of the outer insulation layer.

[0006] Preferably, the outer surface of the core sleeve is provided with a plurality of circularly distributed spiral isolation grooves, and the spiral isolation grooves and the spiral twisting grooves are alternately distributed.

[0007] Preferably, the inside of the insulating isolation strip is hollow, and a magnetic shielding wire is embedded in the inside, the copper conductor is twisted by high-purity oxygen-free copper wires, the diameter of the copper wire is 0.1-0.3mm, and the twisting pitch is 10-20mm.

[0008] Preferably, the inner insulation layer is made of high-temperature-resistant polyimide material, and the thickness is 0.2-0.5mm, the spiral support framework is made of high-strength stainless steel wire, the spiral diameter is 2-5mm, and the spiral pitch is 5-10mm, the elastic buffer layer is made of silicone rubber material, and the thickness is 0.3-0.8mm.

[0009] Preferably, the shielding layer adopts a double-layer copper braid net structure, the copper wire diameter is 0.05-0.1mm, the braid density is not less than 85%, the reinforcing fiber bundle adopts high-strength aramid fiber bundle, the diameter of each reinforcing fiber bundle is 0.5-1mm, and the number is 8-12 bundles.

[0010] Preferably, a plurality of equidistantly distributed multilayer magnetic shielding films are arranged between the adjacent pair of reinforcing fiber bundles, and the multilayer magnetic shielding films are fixedly attached to the inner wall of the shielding layer, the inside of the multilayer magnetic shielding film is hollow, and an air layer is arranged in the inside, and the thickness of the air layer is 0.3-0.5mm.

[0011] Preferably, the outer insulation layer is made of cross-linked polyethylene material, and the thickness is 0.8-1.2mm, a plurality of heat dissipation channels are arranged on the outer surface of the outer insulation layer, and the plurality of heat dissipation channels are spirally arranged around the outer insulation layer, and a high-thermal-conductivity heat dissipation medium is filled in the heat dissipation channels.

[0012] Preferably, the outer protective layer is made of wear-resistant and aging-resistant polyurethane material, and the thickness is 1-1.5mm, a plurality of uniformly distributed spiral protruding ribs are arranged on the outer surface of the outer protective layer, and the height of the spiral protruding rib is 1.8-2mm.

[0013] Preferably, a spiral groove is formed between the adjacent pair of spiral protruding ribs, the cross section of the spiral groove is in the shape of a notched circle, and a plurality of rolling bodies are arranged in the spiral groove in a spiral line shape, and the diameter is 2.8-3mm.

[0014] Preferably, a plurality of circularly distributed spiral through holes are arranged in the inside of the outer protective layer, and a reinforcing fiber is embedded in the inside of each spiral through hole.

[0015] Compared with the prior art, the application has the beneficial effects that: 1. In the application, performance is improved through multi-structure cooperative design. In the cable core assembly, copper conductor twisting improves flexibility and conductivity, and insulation isolation strips cooperate with magnetic shielding wires to enhance electromagnetic shielding. The inner insulation layer of high-temperature resistant material ensures insulation stability, and the spiral support skeleton and elastic buffer layer resist extrusion impact. The double-layer copper mesh of the shielding layer and the reinforcing fiber bundle shield interference and improve tensile strength. The outer insulation layer is designed for heat dissipation to prevent overheating, and the outer protective layer rolling body reduces wear and tear, prolonging the service life of the cable. 2. In the application, performance is optimized by adjusting size parameters, which is suitable for scenarios with requirements for cable size and cost while still ensuring basic performance. The enhanced cable has improved conductivity, pressure resistance, tensile resistance, and other properties, making it suitable for complex working conditions and meeting diverse application needs. In summary, the application optimizes multiple performance aspects through unique structure and material selection. In terms of electrical performance, it ensures stable conductivity and electromagnetic shielding. In terms of physical performance, it has good pressure resistance, tensile resistance, wear resistance, and impact resistance. Heat dissipation design and protective structure ensure long-term stable operation of the cable in high-temperature and complex environments, effectively improving power transmission reliability, reducing maintenance costs, and being suitable for various power transmission scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are included to provide a further understanding of the application, form a part of the specification and are included to further explain the application and are not intended to limit the application. In the drawings: Figure 1 is a schematic diagram of the overall structure of the application; Figure 2 is a schematic diagram of the overall structure of the application; Figure 3 is a schematic diagram of the overall structure of the application; Figure 4 is a schematic diagram of the overall structure of the application; Figure 5 is a schematic diagram of the overall structure of the application; Figure 6 is a schematic diagram of the overall structure of the application; Figure 7 is a schematic diagram of the overall structure of the application; Figure 8 is a schematic diagram of the overall structure of the application; Figure 9 is a schematic diagram of the overall structure of the application; The figure sequence number: 100, the conductive core wire; 101, the core wire sleeve; 102, the copper conductor; 103, the insulating isolation strip; 104, the magnetic shielding wire; 200, the inner insulation layer; 201, the spiral support framework; 202, the elastic buffer layer; 300, the shielding layer; 301, the reinforcing fiber bundle; 302, the multi-layer magnetic shielding film; 303, the air separation layer; 400, the outer insulation layer; 401, the heat dissipation channel; 402, the high-thermal-conductivity heat dissipation medium; 500, the outer protective layer; 501, the spiral convex rib; 502, the reinforcing fiber; 503, the rolling body. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all.

[0018] Embodiment one: the present embodiment provides a power transmission cable, referring to Figures 1-9 , specifically, the structure comprises, from inside to outside, a cable core assembly, an inner insulation layer 200, a shielding layer 300, an outer insulation layer 400, and an outer protective layer 500; The cable core assembly comprises a conductive core wire 100, a core wire sleeve 101, and a plurality of copper conductors 102. The outer surface of the conductive core wire 100 is sleeved with the core wire sleeve 101. The outer surface of the core wire sleeve 101 is provided with a plurality of circularly distributed spiral twisting grooves. Each spiral twisting groove is internally wound with a spiral copper conductor 102. The inner insulation layer 200 is coated on the outside of the core wire sleeve 101. The outer surface of the inner insulation layer 200 is fixedly provided with a plurality of circularly distributed spiral support frameworks 201. The elastic buffer layer 202 is filled between an adjacent pair of spiral support frameworks 201. The shielding layer 300 is coated on the outside of the inner insulation layer 200. The inner surface of the shielding layer 300 is provided with a plurality of U-shaped grooves. Each U-shaped groove is internally fixedly provided with a reinforcing fiber bundle 301. The outer insulation layer 400 is coated on the outside of the shielding layer 300. The outer protective layer 500 is coated on the outside of the outer insulation layer 400.

[0019] In the specific implementation process, as shown in Figure 3 and Figure 5 , the outer surface of the core wire sleeve 101 is provided with a plurality of circularly distributed spiral isolation grooves. The plurality of spiral isolation grooves and the plurality of spiral twisting grooves are alternately distributed. Each spiral isolation groove is internally provided with a spiral isolation strip 103. The inner part of the insulating isolation strip 103 is hollow. The inner part of the insulating isolation strip 103 is embedded with a magnetic shielding wire 104, which further enhances the shielding effect of electromagnetic interference, improves the stability of power transmission and signal quality, and ensures that the cable can still work normally in a complex electromagnetic environment. The copper conductor 102 is twisted by high-purity oxygen-free copper wires, the diameter of the copper wire is 0.1-0.3 mm, the twisting pitch is 10-20 mm, and the multi-strand twisting mode can improve the flexibility and conductivity of the cable; In the specific implementation process, as shown in Figure 3 and Figure 6 , the inner insulation layer 200 is made of high-temperature-resistant polyimide material, and the thickness is 0.2-0.5 mm. This material has excellent insulation performance and high-temperature resistance, which can effectively prevent the copper conductor 102 from contacting the external conductive body, and at the same time maintain stable insulation performance in a high-temperature environment; The spiral support skeleton 201 is made of high-strength stainless steel wire, the spiral diameter is 2-5 mm, and the pitch is 5-10 mm, which can provide radial support for the cable, enhance the compression resistance of the cable, prevent the cable from deforming when being pressed, and protect the internal copper conductor 102 and the inner insulation layer 200; The elastic buffer layer 202 is made of silicone rubber material, and the thickness is 0.3-0.8 mm. The elastic buffer layer 202 can absorb external mechanical impact force, further protect the internal structure of the cable, and at the same time has a certain flexibility without affecting the bending performance of the cable.

[0020] In the specific implementation process, as shown in Figure 3 and Figure 7 , the shielding layer 300 adopts a double-layer copper braid structure, the copper wire diameter is 0.05-0.1 mm, and the braid density is not less than 85%. The double-layer copper braid can effectively shield external electromagnetic interference, and also prevent the internal electromagnetic field of the cable from interfering with external equipment, ensuring the stability of power transmission; The reinforcing fiber bundle 301 is made of high-strength aramid fiber bundle, the diameter of each reinforcing fiber bundle 301 is 0.5-1 mm, and the number is 8-12. The reinforcing fiber bundle 301 can improve the axial tensile strength of the cable and prevent the cable from being pulled apart when subjected to tension; A plurality of multilayer magnetic shielding films 302 are arranged between the adjacent pair of reinforcing fiber bundles 301, and the multilayer magnetic shielding films 302 are fixedly attached to the inner wall of the shielding layer 300. The inside of the multilayer magnetic shielding film 302 is hollow, and the inside is provided with an air layer 303. The thickness of the air layer 303 is 0.3-0.5 mm, which can effectively block external electromagnetic interference.

[0021] In the specific implementation process, as shown in Figure 3 and Figure 8 , the outer insulation layer 400 is made of cross-linked polyethylene material, and the thickness is 0.8-1.2 mm. This material has good insulation performance and weather resistance, which can further protect the internal structure of the cable and prevent the intrusion of external moisture and corrosive substances; The outer surface of the outer insulation layer 400 is provided with a plurality of heat dissipation channels 401, and the plurality of heat dissipation channels 401 are distributed in a spiral around the outer insulation layer 400, and the inside of the heat dissipation channel 401 is filled with a high-thermal-conductivity heat dissipation medium 402, the double-layer copper braid is in close contact with the high-thermal-conductivity heat dissipation medium 402, can quickly conduct the heat generated in the process of cable operation, can dissipate the heat in the cable in time, effectively reduces the temperature of the cable, and guarantees the stability and reliability of the cable under long-time high-load operation.

[0022] In the specific implementation process, as shown in Figure 3 and Figure 9 , the outer protective layer 500 adopts a wear-resistant and aging-resistant polyurethane material, and the thickness is 1-1.5mm, and a plurality of uniformly distributed spiral raised ribs 501 are fixedly arranged on the outer surface of the outer protective layer 500, and the height of the spiral raised rib 501 is 1.8-2mm; A spiral groove is formed between the adjacent pair of spiral raised ribs 501, the cross section of the spiral groove is in the shape of a notch circle, and a plurality of rolling bodies 503 are arranged in the spiral groove in a spiral line, and the diameter of the rolling body 503 is 2.8-3mm, and the rolling body 503 can freely roll in the spiral groove, and when the cable is rubbed or extruded by external force, the rolling body 503 can convert sliding friction into rolling friction, greatly reducing the friction and effectively reducing the wear of the outer sheath; A plurality of spiral through holes are arranged in the inner part of the outer protective layer 500 in a circular manner, and a reinforcing fiber 502 is embedded in each spiral through hole, which further improves the wear resistance and mechanical strength of the outer protective layer 500 and prolongs the service life of the cable.

[0023] The working principle of the embodiment is as follows: Manufacture of the cable core assembly: the core wire sleeve 101 is fixedly sleeved on the conductive core wire 100, high-purity oxygen-free copper wires with a diameter of 0.1-0.3mm are twisted at a twisting pitch of 10-20mm to form copper conductors 102, and the copper conductors 102 are embedded into the spiral twisting grooves, and the insulation isolation strips 103 are embedded into the spiral isolation grooves; Coating of the inner insulation layer 200: using an extrusion molding process, the polyimide material is heated and melted, and then uniformly extruded and coated on the outside of the cable core assembly to form an inner insulation layer 200 with a thickness of 0.2-0.5mm, and then cooled and shaped; high-strength stainless steel wires with a diameter of 2-5mm are wound outside the inner insulation layer 200, and the pitch is controlled to be 5-10mm to form a spiral support skeleton 201; silicon rubber material is injected into the gap between the adjacent pair of spiral support skeletons 201 to form an elastic buffer layer 202 with a thickness of 0.3-0.8mm, and then the silicon rubber is solidified; Shielding layer 300 covering: using braiding process, double-layer copper wire with diameter of 0.05-0.1 mm is braided into copper braid, aramid fiber bundles with diameter of 0.5-1 mm are uniformly laid in the inside of shielding layer 300 along the cable axial direction, the number is 8-12 bundles, and is fixed, then multi-layer magnetic shielding film 302 is fixed and attached to the inner wall of shielding layer 300, finally shielding layer 300 is covered outside inner insulation layer 200, ensuring that the braiding density is not less than 85%, the thickness of air separation layer 303 is 0.3-0.5 mm; Outer insulation layer 400 covering: using extrusion molding process, through the extruder at a temperature of 160-180°C, after the crosslinked polyethylene material is heated and melted, it is uniformly extruded and covered outside shielding layer 300, forming outer insulation layer 400 with thickness of 0.8-1.2 mm, and cooling and setting; Outer protection layer 500 covering: using injection molding process, polyurethane material is injected into the mold, the cable covered with outer insulation layer 400 is put into the mold, after molding, outer protection layer 500 with thickness of 1-1.5 mm is formed, the height of spiral protruding ribs 501 is 1.8-2 mm, the rolling body 503 is ceramic ball bearing with diameter of 2.8-3 mm, and the reinforcing fiber 502 is glass fiber with content of 15%.

[0024] Example two: on the basis of example one, the size of this embodiment is different, and the rest of the structure is the same, and the specific working principle is as follows: Cable core assembly manufacturing: after fixing the core wire sleeve 101 on the conductive core wire 100, high-purity oxygen-free copper wire with diameter of 0.1 mm is twisted according to 10 mm twisting pitch to form copper conductor 102, and a plurality of copper conductors 102 are embedded into the spiral twisting groove, and the insulation isolation strip 103 is embedded into the spiral isolation groove, and the magnetic shielding wire 104 is iron-nickel alloy wire; Inner insulation layer 200 covering: using extrusion molding process, after the polyimide material is heated and melted, it is uniformly extruded and covered outside the cable core assembly, forming inner insulation layer 200 with thickness of 0.2 mm, and cooling and setting; high-strength stainless steel wire with diameter of 2 mm is wound outside the inner insulation layer 200, the pitch is controlled to be 5 mm, forming spiral support skeleton 201; silicone rubber material is injected into the gap between adjacent pair of spiral support skeletons 201, forming elastic buffer layer 202 with thickness of 0.3 mm, and waiting for the silicone rubber to solidify; Shielding layer 300 covering: adopt weaving process, double layer diameter 0.05mm copper wire is woven into copper woven net, the diameter 0.5mm aramid fiber bundle is evenly laid in the inside of shielding layer 300 along the cable axial direction, the number is 8 bundles, and is fixed, again, multiple magnetic shielding film 302 is fixedly attached on the inner wall of shielding layer 300, finally, shielding layer 300 is covered in the outside of inner insulation layer 200, ensure that weaving density is not less than 85%, the thickness of air separation layer 303 is 0.3mm; The covering of the outer insulation layer 400: using extrusion molding process, through extruder at 160 DEG C temperature extrusion, after crosslinked polyethylene material is heated and fused, it is evenly extruded and covered in the outside of shielding layer 300, forms the thickness of 0.8mm outer insulation layer 400, and is cooled and shaped; The covering of the outer protection layer 500: using injection molding process, polyurethane material is injected into the mold, the cable covered with the outer insulation layer 400 is placed in the mold, and after forming, the outer protection layer 500 with a thickness of 1mm is formed. The height of the spiral protruding rib 501 is 1.8mm. The rolling body 503 is a stainless steel ball with a diameter of 2.8mm. The reinforcing fiber 502 is carbon fiber with a content of 12%.

[0025] Example three: on the basis of example one, the size of the embodiment is different, and the rest of the structure is the same. The specific working principle is as follows: The manufacture of the cable core assembly: after the core wire sleeve 101 is fixedly sleeved on the conductive core wire 100, the high-purity oxygen-free copper wire with a diameter of 0.3mm is twisted at a twisting pitch of 20mm to form a copper conductor 102, and a plurality of copper conductors 102 are embedded into the spiral twisting groove, and the insulation isolation strip 103 is embedded into the spiral isolation groove; The covering of the inner insulation layer 200: using extrusion molding process, after polyimide material is heated and fused, it is evenly extruded and covered in the outside of the cable core assembly, forms the thickness of 0.5mm inner insulation layer 200, and is cooled and shaped;The diameter of the high-strength stainless steel wire is 5mm, and the pitch is controlled to be 10mm to form a spiral support skeleton 201;Silicone rubber material is injected into the gap between the adjacent pair of spiral support skeletons 201 to form an elastic buffer layer 202 with a thickness of 0.8mm, and the silicone rubber is solidified; Shielding layer 300 covering: adopt weaving process, double layer diameter 0.1mm copper wire is woven into copper woven net, the diameter 1mm aramid fiber bundle is evenly laid in the inside of shielding layer 300 along the cable axial direction, the number is 12 bundles, and is fixed, again, multiple magnetic shielding film 302 is fixedly attached on the inner wall of shielding layer 300, finally, shielding layer 300 is covered in the outside of inner insulation layer 200, ensure that weaving density is not less than 85%, the thickness of air separation layer 303 is 0.5mm; The outer insulation layer 400 is coated by using an extrusion molding process, and is extruded by an extruder at a temperature of 180 DEG C. After the cross-linked polyethylene material is heated and melted, it is uniformly extruded to coat the outside of the shielding layer 300, and the outer insulation layer 400 with a thickness of 1.2 mm is formed, and is cooled and shaped. The outer protection layer 500 is coated by using an injection molding process, and the polyurethane material is injected into a mold. The cable with the coated outer insulation layer 400 is placed into the mold, and the outer protection layer 500 with a thickness of 1.5 mm is formed after molding. The height of the spiral convex rib 501 is 2 mm, the rolling body 503 is a tungsten carbide ball with a diameter of 3 mm, and the reinforcing fiber 502 is aramid fiber with a content of 13%.

[0026] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacements or changes according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, and all of them should be covered in the protection scope of the present application.

Claims

1. A power transmission cable, comprising, from the inside out, a cable core assembly, an inner insulating layer (200), a shielding layer (300), an outer insulating layer (400), and an outer protective layer (500), characterized in that: The cable core assembly comprises a conductive core wire (100), a core wire sleeve (101), and a plurality of copper conductors (102); the outer surface of the conductive core wire (100) is sheathed with the core wire sleeve (101); the outer surface of the core wire sleeve (101) is provided with a plurality of circularly distributed spiral twisted grooves, and the interior of each spiral twisted groove is wound with a spirally distributed copper conductor (102); The inner insulating layer (200) is coated on the outside of the core wire sleeve (101), and a plurality of circularly distributed spiral support skeletons (201) are fixed on the outer surface thereof, and an elastic buffer layer (202) is filled between adjacent pairs of spiral support skeletons (201); The shielding layer (300) is coated on the outside of the inner insulating layer (200), and a plurality of U-shaped slots are provided on its inner surface, and a reinforcing fiber bundle (301) is fixed inside each of the U-shaped slots; The outer insulating layer (400) is coated on the outside of the shielding layer (300), and the outer protective layer (500) is coated on the outside of the outer insulating layer (400).

2. The power transmission cable according to claim 1, characterized in that: The outer surface of the core wire sleeve (101) is provided with a plurality of circularly distributed spiral isolation grooves, the plurality of spiral isolation grooves and the plurality of spiral twisting grooves are alternately distributed, and the interior of each of the spiral isolation grooves is provided with a spirally distributed insulating isolation strip (103).

3. The power transmission cable according to claim 2, characterized in that: The interior of the insulating isolation strip (103) is hollowed out, and a magnetic shielding wire (104) is embedded therein. The copper conductor (102) is twisted with high-purity oxygen-free copper wires, the diameter of the copper wires is 0.1-0.3 mm, and the twisting pitch is 10-20 mm.

4. The power transmission cable according to claim 1, characterized in that: The inner insulating layer (200) is made of high-temperature resistant polyimide material with a thickness of 0.2-0.5 mm. The spiral support frame (201) is wound with high-strength stainless steel wire with a spiral diameter of 2-5 mm and a pitch of 5-10 mm. The elastic buffer layer (202) is made of silicone rubber material with a thickness of 0.3-0.8 mm.

5. The power transmission cable according to claim 1, characterized in that: The shielding layer (300) adopts a double-layer copper braided mesh structure, the copper wire diameter is 0.05-0.1 mm, and the braiding density is not less than 85%. The reinforcing fiber bundles (301) adopt high-strength aramid fiber bundles, the diameter of each reinforcing fiber bundle (301) is 0.5-1 mm, and the number of bundles is 8-12.

6. The power transmission cable according to claim 5, characterized in that: A plurality of equally spaced multilayer magnetic shielding films (302) are provided between a pair of adjacent reinforcing fiber bundles (301), and the multilayer magnetic shielding films (302) are all fixedly attached to the inner wall of the shielding layer (300). The interior of the multilayer magnetic shielding film (302) is hollowed out, and an air barrier layer (303) is provided therein. The thickness of the air barrier layer (303) is 0.3-0.5 mm.

7. The power transmission cable according to claim 1, characterized in that: The outer insulating layer (400) is made of cross-linked polyethylene material and has a thickness of 0.8-1.2 mm. A plurality of heat dissipation channels (401) are provided on the outer surface of the outer insulating layer (400), and the plurality of heat dissipation channels (401) are distributed in a spiral shape around the outer insulating layer (400). The interior of the heat dissipation channels (401) is filled with a high thermal conductivity heat dissipation medium (402).

8. The power transmission cable according to claim 1, characterized in that: The outer protective layer (500) is made of a wear-resistant and aging-resistant polyurethane material with a thickness of 1-1.5 mm. The outer surface of the outer protective layer (500) is fixed with a plurality of evenly distributed spiral raised ribs (501), and the height of the spiral raised ribs (501) is 1.8-2 mm.

9. The power transmission cable according to claim 8, characterized in that: A spiral groove is formed between a pair of adjacent spirally raised ribs (501), wherein the cross-section of the spiral groove is in the shape of a notched circle, and a plurality of rolling bodies (503) distributed in a spiral shape are provided inside the spiral groove, with a diameter of 2.8-3 mm.

10. The power transmission cable according to claim 9, characterized in that: A plurality of circularly distributed spiral through holes are provided inside the outer protective layer (500), and a reinforcing fiber (502) is embedded inside each of the spiral through holes.

Images