High-shielding anti-interference composite heat dissipation cable

Abstract

The utility model discloses a high-shielding anti-interference composite heat dissipation cable, which comprises a plurality of strands of conductors arranged in parallel, and the outside of each strand of conductor is coated with an insulating layer; the cable also comprises a shielding layer, the shielding layer wraps the insulating layer, and a filling layer is filled between the insulating layers. The shielding layer is coated with a heat dissipation layer, and the heat dissipation layer is coated with a sheath layer. The conductor is of a multi-strand high-purity oxygen-free copper stranded structure, the shielding layer is made of high-conductivity metal foil or a metal woven mesh, the filling layer is made of foamed polyethylene, the sheath layer is made of a high-density polyethylene material, and the composite heat dissipation layer and the shielding structure are adopted, so that the heat dissipation capability and the anti-interference capability of the cable are remarkably improved; and the long-term stable work of the cable in a severe environment is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to cable technical field, concretely relates to high shielding anti -interference composite heat dissipation cable. BACKGROUND

[0002] In modern electronic equipment and system, cable as the key component of signal and power transmission, faces the increasingly complex electromagnetic environment and higher heat dissipation challenge. The traditional cable has obvious deficiency in shielding anti -interference and heat dissipation.

[0003] Ordinary cable shielding structure is simple, and it is difficult to resist complex electromagnetic interference, such as in communication base station, different frequency band signals interfere with each other, leading to communication signal distortion, error rate increase, influence communication quality. The heat dissipation problem is prominent, along with the equipment power promotion, the heat generated by cable increases, like data center high speed transmission cable, heat accumulation makes the aging of insulating material accelerate, shortens the service life of cable, and even causes fire hazard. The existing heat dissipation measures are difficult to meet the demand, and improvement is urgently needed.

[0004] In addition, the cable generates a large amount of heat during long time work, which may affect the service life and signal quality of the cable. Therefore, it is a current technical requirement to develop a cable with good anti-interference, heat dissipation and high temperature resistance. SUMMARY

[0005] The utility model discloses a high shielding anti -interference composite heat dissipation cable, which aims to significantly improve the heat dissipation capacity and anti-interference capacity of the cable by adopting a composite heat dissipation layer and a shielding structure, and ensure the long-term stable work of the cable in harsh environment.

[0006] To solve the above technical problems, the utility model discloses a high shielding anti -interference composite heat dissipation cable, which is realized as follows:

[0007] The high shielding anti -interference composite heat dissipation cable comprises a plurality of parallelly arranged conductors, each conductor is coated with an insulating layer outside, a shielding layer is coated outside the insulating layer, a filling layer is filled between the insulating layers, a heat dissipation layer is coated outside the shielding layer, a sheath layer is coated outside the heat dissipation layer, the conductors are a high-purity oxygen-free copper stranded structure, the shielding layer is a high-conductivity metal foil or metal woven mesh, the filling layer is foamed polyethylene, and the sheath layer is high-density polyethylene material.

[0008] On the basis of the above scheme and as a preferred scheme of the above scheme: the insulating layer is of crosslinked polyethylene material.

[0009] On the basis of the above scheme and as a preferred scheme of the above scheme: the heat dissipation layer is of graphene material.

[0010] Based on the above scheme and as a preferred scheme of the above scheme: the heat dissipation layer is a graphene and metal composite structure; it includes a metal layer and a graphene layer.

[0011] Based on the above scheme and as a preferred scheme of the above scheme: the metal layer is a copper foil.

[0012] Based on the above scheme and as a preferred scheme of the above scheme: the heat dissipation layer is distributed with heat dissipation holes.

[0013] Based on the above scheme and as a preferred scheme of the above scheme: the shielding layer includes an inner shielding layer and an outer shielding layer, the inner shielding layer is an aluminum foil, and the outer shielding layer is a copper woven mesh structure.

[0014] The utility model discloses a cable with a composite heat dissipation layer and a shielding structure, which has the advantages of high heat dissipation capacity and anti-interference capacity, and ensures long-term stable operation of the cable in harsh environments. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the whole structure schematic drawing of the utility model. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantage of the present application more clear, the technical scheme in the embodiment will be described clearly and completely in the following with the drawings in the embodiment. Obviously, the described embodiment is only a part of the present application, not all. Based on the given embodiment, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0017] In the description of the present application, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application.

[0018] High shielding anti-interference composite heat dissipation cable, comprising a plurality of parallel arranged conductors 1, wherein the conductor 1 is prepared by selecting 19 strands of high-purity oxygen-free copper wire with a diameter of 0.20±0.01 mm, the purity is ≥99.99%, and the twisting pitch is 12 times the diameter of the conductor according to SJ / T 11316 standard. And after twisting, annealing process is carried out, for example, the copper wire can be heated to 350±5℃ at a rate of 5℃ / min under a protective atmosphere of nitrogen with a purity of ≥99.999% and a flow rate of 10L / min, and then slowly cooled to below 50℃ at a rate of 2℃ / min, and the resistivity of the copper wire after treatment is ≤1.65×10⁻ 8Ω·mASTM B193 test. The outer part of each conductor 1 is covered with an insulation layer 2, wherein the insulation layer 2 is made of cross-linked polyethylene, using a three-layer co-extrusion process, the inner layer is XLPE Dow Chemical DFDB-6051NT with a melt index of 0.5 g / 10 min, the middle layer adds 2% antioxidant BASF Irganox 1010, and the outer layer is coated with a 0.1 mm thick silane cross-linked layer, the extruder temperature partition is set to 120°C feeding zone, 150°C plasticizing zone, 135°C die head, die pressure 15 MPa, the total thickness of the insulation layer is 1.2 ± 0.05 mm; it also includes a shielding layer 4, the shielding layer 4 is covered on the outside of the insulation layer 2, preferably the shielding layer 4 includes an inner shielding layer and an outer shielding layer, wherein the inner shielding layer is a 0.08 ± 0.005 mm thick soft aluminum foil ASTM B479 standard, and the outer shielding layer uses an 80-mesh phosphor copper woven mesh with a single wire diameter of 0.12 mm and a coverage rate of ≥88%, both of which are bonded by conductive silver glue Han Gao LOCTITE ABLESTIK 2902, and the curing condition is 120°C x 30min, and the interface resistance is ≤0.08ΩIEC 60468 test. The shielding layer 4 and the insulation layer 2 are filled with a filling layer 3, which is preferably a foamed polyethylene; the outer part of the shielding layer 4 is covered with a heat dissipation layer 5, which is made by mixing graphene powder with a specific surface area of ≥750 m² / g and epoxy resin Dow Chemical DER 331 at a mass ratio of 1:4, ultrasonic dispersion for 30 min, and then coated on the outer surface of the shielding layer, the coating thickness is 0.5 ± 0.02 mm; further preferably, the heat dissipation layer 5 is distributed with heat dissipation holes, specifically, the heat dissipation holes can be processed by laser drilling process to form a regular hexagonal honeycomb hole array on the surface of the coating, the single hole diameter is 0.8 ± 0.05 mm, the hole spacing is 1.2 mm, and the hole density is 25 pieces / cm²SEM detection; the outer part of the heat dissipation layer 5 is covered with a sheath layer 6, and the sheath layer 6 is made of high-density polyethylene. HDPE with a melt index of 0.3 g / 10 min and silicon carbide powder with a particle size D50 = 30 μm and a purity of 99.9% can be premixed at a ratio of 95:5, blended and granulated by a double-screw extruder with a length-diameter ratio of 40:1 at a temperature range of 180-210°C, and finally coated and formed by a 60 mm single-screw extruder, the sheath thickness is 2.0 ± 0.1 mm, and the oxygen index is ≥28.5% GB / T 2406 test.

[0019] The high-shielding anti-interference composite heat dissipation cable in the present application is subjected to the following performance tests:

[0020] Shielding effectiveness: test IEEE 299 standard at 1 GHz frequency, shielding effectiveness reaches 92.3 dB.

[0021] Temperature rise test: rated current 300A continuous operation for 8 hours, cable surface temperature 68.5°C measured by infrared thermal imager, reduced by 31°C compared with traditional cable PVC sheath of the same specification.

[0022] 3. Mechanical properties: Sheath tensile strength ≥ 24 MPa GB / T 1040, wear resistance ASTM D4060 increased by 42% compared to pure HDPE.

[0023] The above embodiments are only preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A high-shield, anti-interference composite heat dissipation cable, characterized in that: The device includes multiple parallel conductors (1), each conductor (1) being covered with an insulating layer (2); it also includes a shielding layer (4), which covers the outside of the insulating layer (2), and a filler layer (3) is filled between the shielding layer (4) and the insulating layer (2); a heat dissipation layer (5) is covered outside the shielding layer (4), and a sheath layer (6) is covered outside the heat dissipation layer (5); the conductors (1) are multi-strand high-purity oxygen-free copper stranded structures, the shielding layer (4) is a high-conductivity metal foil or metal braided mesh, the filler layer (3) is foamed polyethylene, and the sheath layer (6) is made of high-density polyethylene.

2. The high-shield anti-interference composite heat dissipation cable according to claim 1, characterized in that, The insulating layer (2) is made of cross-linked polyethylene.

3. The high-shield, anti-interference composite heat dissipation cable according to claim 1, characterized in that, The heat dissipation layer is made of graphene.

4. The high-shield anti-interference composite heat dissipation cable according to claim 3, characterized in that, The heat dissipation layer has a graphene and metal composite structure; It consists of a metal layer and a graphene layer.

5. The high-shield anti-interference composite heat dissipation cable according to claim 4, characterized in that, The metal layer is copper foil.

6. The high-shield anti-interference composite heat dissipation cable according to claim 1, characterized in that, The heat dissipation layer has heat dissipation holes distributed on it.

7. The high-shield anti-interference composite heat dissipation cable according to claim 1, characterized in that, The shielding layer (4) includes an inner shielding layer and an outer shielding layer. The inner shielding layer is aluminum foil, and the outer shielding layer is a copper braided mesh structure.

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