Graphene high-efficiency heat dissipation cable

Abstract

The utility model relates to the technical field of cables, and discloses a graphene efficient heat dissipation cable which comprises a cable body, a conductor is arranged in the cable body, an insulating layer is arranged on the outer side of the conductor, a shielding layer is arranged on the outer side of the insulating layer, a heat dissipation layer is arranged on the outer side of the shielding layer, and an outer sheath is arranged on the outer side of the heat dissipation layer. The surface of the conductor is coated with a first graphene coating; and graphene microchips are uniformly dispersed in the insulating layer material. The cable has the following advantages and effects: through arrangement of the insulating layer, the heat dissipation layer and the outer sheath, heat generated in the cable can be rapidly conducted to the outer sheath through excellent heat conductivity of graphene, and then the heat is efficiently dissipated to the surrounding environment through the heat dissipation fins on the surface of the outer sheath; the purposes of effectively reducing the operating temperature of the cable, reducing insulation aging and electrical fault risks caused by overheating, greatly prolonging the service life of the cable and greatly improving the operating stability of the cable can be achieved.

Description

Technical Field

[0001] This application relates to the field of cable technology, and in particular to a graphene high-efficiency heat dissipation cable. Background Technology

[0002] With the increasing demands on cable performance from power transmission and electronic equipment, the heat generated by cables during operation is becoming a growing concern. Excessive temperatures can accelerate the aging of cable insulation materials, shorten their service life, and even lead to safety accidents.

[0003] A search revealed a patent document with authorization announcement number CN209767852U, which discloses a graphene heating cable. The cable includes a heating core composed of multi-strand alloy heating wires, a silicone rubber flame-retardant and high-temperature resistant layer circumferentially wrapped around the heating core, a tensile heat transfer layer circumferentially wrapped around the flame-retardant and high-temperature resistant layer to withstand the axial tensile force of the cable, a copper mesh braided shielding layer circumferentially wrapped around the tensile heat transfer layer, an aluminum foil shielding layer circumferentially wrapped around the copper mesh braided shielding layer, and a PVC sheath layer circumferentially wrapped around the aluminum foil shielding layer to prevent cable damage. The outer perimeter of the aluminum foil shielding layer is uniformly coated with a graphene coating to improve heat transfer efficiency. This design utilizes the high thermal conductivity and good adhesion of graphene to enable faster heat transfer during heating, improving the thermal conductivity of the heating cable and the heat dissipation performance of the heating core, thereby increasing the heating rate and heating efficiency of the cable.

[0004] In practical use, it has been found that existing cables have low heat dissipation efficiency and complex structure, which makes the insulation material prone to aging at high temperatures, shortening the service life and causing safety accidents. Therefore, we propose a graphene high-efficiency heat dissipation cable to solve the above problems. Utility Model Content

[0005] The purpose of this application is to address the shortcomings of existing technologies, such as low heat dissipation efficiency and complex structure, which lead to easy aging of insulation materials, shortened service life, and safety accidents in cables at high temperatures. Therefore, this application proposes a graphene high-efficiency heat dissipation cable.

[0006] The above-mentioned technical objective of this application is achieved through the following technical solution: a graphene high-efficiency heat dissipation cable, comprising a cable, wherein a conductor is disposed inside the cable, an insulation layer is disposed outside the conductor, a shielding layer is disposed outside the insulation layer, a heat dissipation layer is disposed outside the shielding layer, and an outer sheath is disposed outside the heat dissipation layer; a first graphene coating is coated on the surface of the conductor; graphene micro-flakes are uniformly dispersed in the insulation layer material; a second graphene coating is coated on the surface of the shielding layer; the heat dissipation layer is made of graphene composite heat dissipation material; and heat dissipation fins are provided on the surface of the outer sheath.

[0007] A further feature of this application is that the conductor is made of multiple strands of metal wires twisted together, and the multiple strands of metal wires are copper wires.

[0008] By adopting the above technical solution and setting a conductor made of multiple strands of copper wire, the heat conduction inside the conductor is more uniform, which can improve the overall heat dissipation efficiency and thus significantly enhance the heat dissipation capacity of the cable while ensuring electrical performance.

[0009] A further provision of this application is that the thickness of the first graphene coating is 0.01-0.1 mm.

[0010] By adopting the above technical solution, and by setting a first graphene coating, the first graphene coating can quickly transfer the generated heat to the outside through thermal conduction.

[0011] A further provision of this application is that the graphene micro-flakes in the insulating layer account for 1%-5% of the mass, and the insulating layer material is cross-linked polyethylene.

[0012] By adopting the above technical solution and setting an insulating layer, an effective heat conduction channel is constructed within the insulating layer through graphene microsheets, enabling heat to pass through the insulating layer quickly and uniformly.

[0013] A further provision of this application is that the shielding layer is formed by wrapping copper or aluminum strips, and the thickness of the second graphene coating is 0.02-0.2 mm.

[0014] By adopting the above technical solution and setting a shielding layer, the second graphene coating of the shielding layer not only enhances heat dissipation but also improves electromagnetic shielding performance, thereby reducing the impact of external electromagnetic interference on cable signal transmission and ensuring the stability of cable electrical performance.

[0015] A further feature of this application is that the graphene composite heat dissipation material of the heat dissipation layer is composed of graphene, high thermal conductivity ceramic particles and an organosilicon rubber matrix, wherein the mass percentage of graphene is 10%-30%, the mass percentage of high thermal conductivity ceramic particles is 20%-50%, and the thickness of the heat dissipation layer is 1-5mm.

[0016] By adopting the above technical solution and setting a heat dissipation layer, the ultra-high thermal conductivity of graphene and the synergistic effect of high thermal conductivity ceramic particles can achieve the purpose of having extremely high thermal conductivity and efficiently absorbing and transferring heat.

[0017] A further provision of this application is that the high thermal conductivity ceramic particles are aluminum nitride.

[0018] By adopting the above technical solution and incorporating aluminum nitride, the extremely high thermal conductivity of aluminum nitride can effectively alleviate the interfacial stress caused by the difference in thermal expansion between the silicone rubber matrix and graphene, thereby enhancing the structural stability of the composite material.

[0019] A further feature of this application is that the heat dissipation fins of the outer sheath are 3-10mm high and 5-20mm apart, and the outer sheath material is polyvinyl chloride.

[0020] By adopting the above technical solution and setting heat dissipation fins, the heat dissipation area of ​​the cable is significantly increased, which can promote air convection heat dissipation and quickly dissipate heat to the surrounding environment, thereby achieving efficient heat dissipation of the cable.

[0021] The beneficial effects of this application are:

[0022] (1) By coating the conductor surface with a first graphene coating, dispersing graphene micro-flakes in the insulation layer, coating the shielding layer with a second graphene coating, and using graphene composite heat dissipation material to make a heat dissipation layer, the heat generated inside the cable can be quickly conducted to the outer sheath through the excellent thermal conductivity of graphene, and then the heat dissipation fins on the surface of the outer sheath can efficiently dissipate the heat to the surrounding environment. This can effectively reduce the operating temperature of the cable, reduce the risk of insulation aging and electrical faults caused by overheating, and greatly improve the service life and operational stability of the cable.

[0023] (2) The first graphene coating on the conductor surface can effectively reduce the resistance of the conductor. According to Joule's law, the reduction in resistance reduces the generation of Joule heat during current transmission, thereby reducing power loss. This can improve the power transmission efficiency and energy saving effect of the cable, and at the same time enable the cable to carry a larger current without overheating, thus increasing the current carrying capacity of the cable. Meanwhile, the second graphene coating on the shielding layer enhances heat dissipation and also improves electromagnetic shielding performance, thereby reducing the impact of external electromagnetic interference on the cable signal transmission and ensuring the stability of the cable's electrical performance. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional structural schematic diagram of a graphene high-efficiency heat dissipation cable according to this application;

[0026] Figure 2 This is a schematic diagram of the front cross-sectional structure of a graphene high-efficiency heat dissipation cable according to this application;

[0027] Figure 3 This is a schematic diagram of the conductor structure of a graphene high-efficiency heat dissipation cable according to this application;

[0028] Figure 4 This is a schematic diagram of structure A of a graphene high-efficiency heat dissipation cable according to this application.

[0029] In the diagram: 1. Cable; 2. Conductor; 201. First graphene coating; 3. Insulation layer; 301. Graphene microsheet; 4. Shielding layer; 5. Heat dissipation layer; 6. Heat dissipation fins. Detailed Implementation

[0030] The technical solution of this application will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0031] See Figures 1-4 This application provides a graphene high-efficiency heat dissipation cable, including a cable 1, a conductor 2 disposed inside the cable 1, an insulation layer 3 disposed outside the conductor 2, a shielding layer 4 disposed outside the insulation layer 3, a heat dissipation layer 5 disposed outside the shielding layer 4, and an outer sheath disposed outside the heat dissipation layer 5; the surface of the conductor 2 is coated with a first graphene coating 201; graphene micro-flakes 301 are uniformly dispersed in the insulation layer 3 material; the surface of the shielding layer 4 is coated with a second graphene coating; the heat dissipation layer 5 is made of graphene composite heat dissipation material; and heat dissipation fins 6 are provided on the surface of the outer sheath.

[0032] Specifically, conductor 2 is made of multiple strands of metal wires twisted together, and the multiple strands of metal wires are copper wires.

[0033] Specifically, the thickness of the first graphene coating 201 is 0.01-0.1 mm.

[0034] Specifically, the graphene micro-flakes in the insulating layer 3 account for 1%-5% of the mass, and the material of the insulating layer 3 is cross-linked polyethylene.

[0035] Specifically, the shielding layer 4 is made of copper or aluminum strips wrapped around it, and the thickness of the second graphene coating is 0.02-0.2mm.

[0036] Specifically, the graphene composite heat dissipation material of heat dissipation layer 5 is composed of graphene, high thermal conductivity ceramic particles and silicone rubber matrix, wherein the mass percentage of graphene is 10%-30%, the mass percentage of high thermal conductivity ceramic particles is 20%-50%, and the thickness of the heat dissipation layer is 1-5mm.

[0037] Specifically, the high thermal conductivity ceramic particles are aluminum nitride.

[0038] Specifically, the heat dissipation fins of the outer sheath are 3-10mm high and 5-20mm apart, and the outer sheath material is polyvinyl chloride.

[0039] In this application, during the operation of the graphene high-efficiency heat dissipation cable 1, current is transmitted in the conductor 2, which is made of multiple strands of copper wire. Because the surface of the conductor 2 is coated with a first graphene coating 201 with a thickness of 0.01-0.1 mm, based on the electrical and thermal properties of graphene, the resistance of the conductor 2 can be effectively reduced, thereby reducing the generation of Joule heat. Simultaneously, the first graphene coating 201 can rapidly transfer the generated heat outwards via thermal conduction. The heat generated by the conductor 2 is conducted to the insulation layer 3, which is made of cross-linked polyethylene material, in which graphene micro-flakes 301 with a mass ratio of 1%-5% are uniformly dispersed. The graphene micro-flakes 301 can construct an effective heat conduction channel within the insulation layer 3, enabling the heat to pass through the insulation layer 3 quickly and uniformly. The heat continues to be transferred outwards to the shielding layer 4, which is made of copper or aluminum strips and coated with a second graphene coating with a thickness of 0.02-0.2 mm, further enhancing the heat conduction efficiency. Subsequently... Heat reaches the heat dissipation layer 5, which is made of a graphene composite heat dissipation material composed of graphene, high thermal conductivity ceramic particles, and an organosilicon rubber matrix. The graphene content is 10%-30% by mass, and the high thermal conductivity ceramic particles content is 20%-50% by mass. The thickness of the heat dissipation layer 5 is 1-5mm. This composite material, through the ultra-high thermal conductivity of graphene and the synergistic effect of the high thermal conductivity ceramic particles, achieves extremely high thermal conductivity, enabling efficient absorption and transfer of heat. Finally, the heat is conducted to the outer sheath, which is made of polyvinyl chloride (PVC) material. Its surface is equipped with heat dissipation fins 6 with a height of 3-10mm and a spacing of 5-20mm. The heat dissipation fins 6 significantly increase the heat dissipation area of ​​the cable 1, promoting air convection and quickly dissipating heat into the surrounding environment. This achieves efficient heat dissipation of the cable 1, effectively reducing its operating temperature, ensuring stable and reliable operation, and preventing aging of the cable 1's insulation material, shortening its service life, and avoiding safety accidents.

Claims

1. A graphene high-efficiency heat dissipation cable, characterized in that, The cable (1) includes a conductor (2) inside the cable (1), an insulation layer (3) on the outside of the conductor (2), a shielding layer (4) on the outside of the insulation layer (3), a heat dissipation layer (5) on the outside of the shielding layer (4), and an outer sheath on the outside of the heat dissipation layer (5); the surface of the conductor (2) is coated with a first graphene coating (201). The insulating layer (3) contains uniformly dispersed graphene micro-flakes (301); the shielding layer (4) is coated with a second graphene coating; the heat dissipation layer (5) is made of graphene composite heat dissipation material; and the outer sheath is provided with heat dissipation fins (6).

2. The graphene high-efficiency heat dissipation cable according to claim 1, characterized in that: The conductor (2) is made of multiple strands of metal wires twisted together, and the multiple strands of metal wires are copper wires.

3. The graphene high-efficiency heat dissipation cable according to claim 1, characterized in that: The thickness of the first graphene coating (201) is 0.01-0.1 mm.

4. The graphene high-efficiency heat dissipation cable according to claim 1, characterized in that: The graphene micro-sheets in the insulating layer (3) account for 1%-5% of the mass, and the material of the insulating layer (3) is cross-linked polyethylene.

5. The graphene high-efficiency heat dissipation cable according to claim 1, characterized in that: The shielding layer (4) is made of copper or aluminum strips wrapped around it, and the thickness of the second graphene coating is 0.02-0.2 mm.

6. The graphene high-efficiency heat dissipation cable according to claim 1, characterized in that: The graphene composite heat dissipation material of the heat dissipation layer (5) is composed of graphene, high thermal conductivity ceramic particles and organosilicon rubber matrix.

7. The graphene high-efficiency heat dissipation cable according to claim 6, characterized in that: The high thermal conductivity ceramic particles are aluminum nitride.

8. The graphene high-efficiency heat dissipation cable according to claim 1, characterized in that: The heat dissipation fins (6) of the outer sheath are 3-10mm high and 5-20mm apart. The outer sheath is made of polyvinyl chloride.

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