Shielded cable

Abstract

The utility model discloses a shielding cable, and specifically relates to the cable technology field, the shielding cable comprises an inner layer conductor and an outer layer sheath arranged at the outer side of the inner layer conductor, the outer side of the inner layer conductor is surrounded by a plurality of insulating layers and a plurality of filling layers, the outer sides of the insulating layers and the filling layers are provided with shielding layers, the shielding layers are arranged in the outer layer sheath, and the outer layer sheath is arranged in the outer layer conductor. A wrapping layer is arranged in the shielding layer, the wrapping layer wraps the outer sides of the inner layer conductor, the insulating layer and the filling layer, a plurality of heat dissipation assemblies are arranged on the outer side of the outer layer sheath, and each heat dissipation assembly comprises a plurality of long-strip-shaped heat dissipation openings formed in the outer side of the outer layer sheath. According to the utility model, the wrapping layer made of polyethylene wraps the outer sides of the inner layer conductor, the insulating layer and the filling layer, so that the inner layer conductor, the insulating layer and the filling layer can be protected, meanwhile, the thermal conductivity of the wrapping layer is relatively high, heat dissipation of the inner layer conductor through the wrapping layer and the long-strip-shaped heat dissipation openings during working is facilitated, and the service life of the cable is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a shielded cable. Background Art

[0002] Cables are made of one or more mutually insulated inner conductors and an outer insulating protective layer, and are used to transmit electricity or information from one place to another; cables include power cables, control cables, compensating cables, shielded cables, high-temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, marine cables, mining cables, aluminum alloy cables, etc.

[0003] Shielded cable is a transmission line that uses a metal mesh braided layer to wrap the signal line. The braided layer is generally red copper or tinned copper, which can effectively filter out unnecessary electromagnetic waves and prevent interference signals from interfering with the conductor. For example, the prior art publication number CN204884622U is a shielded cable, whose public shielding layer uses a metal mesh layer. The metal mesh absorbs electromagnetic waves and guides them into the ground through a guide wire, thereby improving the electromagnetic interference capability.

[0004] At present, the prior art provides asbestos filling in the gap between the insulating layer and the guide wire. Although it can protect the inner conductor, asbestos is a commonly used thermal insulation material in the field of building materials and has poor thermal conductivity. Therefore, filling asbestos in the cable greatly reduces the heat dissipation capacity of the inner conductor, thereby easily reducing the service life of the cable. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a shielded cable. By wrapping a wrapping layer made of polyethylene around the outer side of an inner conductor, an insulating layer and a filling layer, the impact of external force on the inner conductor, the insulating layer and the filling layer can be reduced, thereby protecting the inner conductor, the insulating layer and the filling layer. At the same time, the wrapping layer has a high thermal conductivity, which is beneficial to the heat dissipation of the inner conductor through the wrapping layer and the long strip heat dissipation port when the inner conductor is working, thereby improving the service life of the cable.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a shielded cable, comprising an inner conductor and an outer sheath arranged on the outside of the inner conductor, wherein the outer side of the inner conductor is surrounded by multiple insulating layers and multiple filling layers, and the insulating layers and the filling layers are alternately distributed.

[0007] A shielding layer is arranged outside the insulating layer and the filling layer, the shielding layer is arranged inside the outer sheath, and the outer wall of the shielding layer is fixed to the inner wall of the outer sheath.

[0008] A wrapping layer is provided inside the shielding layer, and the wrapping layer is wrapped around the outside of the inner conductor, the insulating layer and the filling layer to protect the inner conductor, the insulating layer and the filling layer. Multiple groups of heat dissipation components are provided outside the outer sheath to facilitate heat dissipation of the inner conductor. The heat dissipation components include multiple long strip heat dissipation ports opened outside the outer sheath, and a tensile reinforcement layer is fixed inside each of the long strip heat dissipation ports, and the tensile reinforcement layer is woven from polypropylene fiber and carbon fiber;

[0009] Polypropylene fiber is a synthetic fiber spun from isotactic polypropylene obtained by polymerization of propylene. It has high strength, good wear resistance and resilience, and high resistivity (7×1019Ω.cm).

[0010] Carbon fiber refers to high-strength and high-modulus fiber with a carbon content of more than 90%. It is made of acrylic and viscose fibers and is made through high-temperature oxidation and carbonization. It has the highest high-temperature resistance among all chemical fibers. Carbon fiber is mainly composed of carbon elements and has the characteristics of high-temperature resistance, friction resistance, thermal conductivity and corrosion resistance. It is fibrous, soft, and can be processed into various fabrics. Because its graphite microcrystalline structure is preferentially oriented along the fiber axis, it has high strength and modulus along the fiber axis. Carbon fiber has a low density, so its specific strength and specific modulus are high.

[0011] Preferably, the inner conductor is a tinned copper wire. Tinned copper wire refers to a copper wire with a thin layer of metallic tin plated on the surface. The material is relatively soft and has good conductivity. Compared with bare copper wire, its corrosion resistance and oxidation resistance are stronger.

[0012] Preferably, the insulating layer is made of FEP, which has excellent chemical resistance and stability. Except for reacting with fluorine at high temperature, molten alkali metals and chlorine trifluoride, FEP will not be corroded when in contact with other chemicals. The heat resistance of FEP is second only to polytetrafluoroethylene. It can be used continuously in the temperature range of -85 to +200°C. Even in the extreme conditions of -200°C and +260°C, its performance does not deteriorate and it can be used for a short time. The electrical insulation performance of FEP is very similar to that of polytetrafluoroethylene. Its dielectric constant is almost unchanged from deep cooling to the highest operating temperature, and in a wide range from 50Hz to 1010Hz ultra-high frequency, and is very low, only about 2.1.

[0013] Preferably, the filling layer is formed by twisting Kravitz wire and copper wire, and has high flexibility and folding resistance.

[0014] Preferably, the shielding layer is woven from tinned copper wire. Compared with pure copper wire, tinned copper wire has excellent conductivity, can provide low-resistance, low-loss current transmission, ensure the efficiency and stability of power transmission, and has good heat resistance. It can maintain the stability of the wire in a high temperature environment and is suitable for high-load, high-temperature circuit applications.

[0015] Preferably, the outer sheath is made of TPE, which is light in weight, corrosion-resistant, wear-resistant, aging-resistant, elastic, insulating, easy to process, and environmentally friendly.

[0016] Preferably, the wrapping layer is made of polyethylene, which is an insulating material that is resistant to heat, cold, water, impact, and most acid and alkali corrosion, and has high thermal conductivity.

[0017] Technical effects and advantages of the utility model:

[0018] 1. The utility model wraps the inner conductor, the insulating layer and the filling layer with a polyethylene wrapping layer, so as to reduce the impact of external force on the inner conductor, the insulating layer and the filling layer, thereby protecting the inner conductor, the insulating layer and the filling layer and extending the service life of the cable;

[0019] 2. The thermal conductivity of the polyethylene wrapping layer is high, which is conducive to transferring the heat generated by the inner conductor. The heat is dissipated outward through the long strip heat dissipation port on the outside of the outer sheath, which is conducive to the heat dissipation of the inner conductor and further improves the service life of the cable;

[0020] 3. Fixing the tensile reinforcement layer made of polypropylene fiber and carbon fiber in the long strip heat dissipation port is beneficial to improving the strength and tensile performance of the cable. At the same time, carbon fiber has good thermal conductivity and will not hinder the heat of the inner conductor from being dissipated outward through the long strip heat dissipation port. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 It is a cross-sectional view of the utility model;

[0023] Figure 3 This is a structural diagram of the outer sheath of the utility model;

[0024] Figure 4 It is a cross-sectional view of the outer sheath and heat dissipation assembly of the utility model;

[0025] Figure 5 This is a structural diagram of the tensile reinforcement layer of the utility model.

[0026] The reference numerals are: 1 inner conductor, 2 insulating layer, 3 filling layer, 4 shielding layer, 5 outer sheath, 6 wrapping layer, 7 heat dissipation component, 71 long strip heat dissipation port, 72 tensile reinforcement layer, 721 polypropylene fiber, 722 carbon fiber. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Refer to the instruction manual Figure 1-2 The utility model provides a shielded cable, including an inner conductor 1, wherein the inner conductor 1 is a tinned copper wire. The tinned copper wire refers to a copper wire with a thin layer of metal tin plated on the surface of the copper wire. The tinned copper wire is relatively soft and has good electrical conductivity. Compared with bare copper wire, it has stronger corrosion resistance and oxidation resistance, and can greatly extend the service life of the cable.

[0029] The inner conductor 1 is surrounded by a plurality of insulating layers 2 and a plurality of filling layers 3, wherein the insulating layers 2 and the filling layers 3 are staggered. The insulating layer 2 is made of FEP, which has excellent chemical resistance, high temperature performance and electrical insulation performance; the filling layer 3 is formed by twisting Kevlar wire and copper wire, and has high flexibility and folding resistance.

[0030] A shielding layer 4 is provided outside the insulating layer 2 and the filling layer 3. The shielding layer 4 is woven from tinned copper wires and has excellent shielding performance, and can avoid signal interference.

[0031] Next, an outer sheath 5 is provided on the outside of the shielding layer 4, and the outer wall of the shielding layer 4 is fixed to the inner wall of the outer sheath 5. The outer sheath 5 is made of TPE, which is a thermoplastic elastomer, also known as artificial rubber or synthetic rubber. It has the excellent properties of high elasticity, aging resistance and oil resistance of traditional cross-linked vulcanized rubber, and at the same time has the characteristics of easy processing and a wide range of processing methods of ordinary plastics.

[0032] A wrapping layer 6 is provided inside the shielding layer 4, and the wrapping layer 6 is made of polyethylene. Polyethylene is a common insulating material with good insulating properties, and has the characteristics of heat resistance, cold resistance, water resistance, impact resistance, and resistance to most acid and alkali corrosion. The wrapping layer 6 is wrapped around the outer side of the inner conductor 1, the insulating layer 2 and the filling layer 3, which can reduce the impact of external force on the inner conductor 1, the insulating layer 2 and the filling layer 3, thereby protecting the inner conductor 1, the insulating layer 2 and the filling layer 3 and extending the service life of the cable.

[0033] like Figure 3 and 4 As shown, multiple groups of heat dissipation components 7 are provided on the outside of the outer sheath 5 to facilitate heat dissipation of the inner conductor 1. The heat dissipation components 7 include multiple long strip heat dissipation openings 71 opened on the outside of the outer sheath 5;

[0034] The wrapping layer 6 made of polyethylene has a high thermal conductivity, which is conducive to transferring the heat generated by the inner conductor 1. The heat is dissipated outward through the long strip heat dissipation openings 71 on the outside of the outer sheath 5, which is conducive to the heat dissipation of the inner conductor 1 and further improves the service life of the cable.

[0035] Further, such as Figure 4-5 As shown, a tensile reinforcement layer 72 is fixed in each long strip heat dissipation opening 71 , and the tensile reinforcement layer 72 is woven from polypropylene fibers 721 and carbon fibers 722 .

[0036] The polypropylene fiber 721 is made of polypropylene as raw material and refined through unique processes and equipment, such as melting-extrusion-stretching-surface treatment-cutting, etc. It has outstanding tensile strength, wear resistance, corrosion resistance, and good electrical insulation. The carbon fiber 722 is a high-strength and high-modulus fiber. Therefore, the tensile reinforcement layer 72 made of the polypropylene fiber 721 and the carbon fiber 722 is fixed in the long strip heat dissipation port 71, which is beneficial to improve the strength and tensile performance of the cable.

[0037] At the same time, the carbon fiber 722 has good thermal conductivity and will not hinder the heat of the inner conductor 1 from being dissipated outward through the long strip heat dissipation opening 71 .

[0038] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A shielded cable, comprising an inner conductor (1) and an outer sheath (5) arranged outside the inner conductor (1), characterized in that: The outer side of the inner conductor (1) is surrounded by a plurality of insulating layers (2) and a plurality of filling layers (3), and the insulating layers (2) and the filling layers (3) are arranged in a staggered manner; A shielding layer (4) is provided outside the insulating layer (2) and the filling layer (3); the shielding layer (4) is provided inside the outer sheath (5); and the outer wall of the shielding layer (4) is fixed to the inner wall of the outer sheath (5); A wrapping layer (6) is provided inside the shielding layer (4), and the wrapping layer (6) is wrapped around the outer sides of the inner conductor (1), the insulating layer (2) and the filling layer (3), and is used to protect the inner conductor (1), the insulating layer (2) and the filling layer (3); A plurality of heat dissipation components (7) are arranged on the outside of the outer sheath (5) to facilitate heat dissipation of the inner conductor (1); The heat dissipation component (7) comprises a plurality of elongated heat dissipation openings (71) opened on the outside of the outer jacket (5), and a tensile reinforcement layer (72) is fixed inside each elongated heat dissipation opening (71), wherein the tensile reinforcement layer (72) is woven from polypropylene fibers (721) and carbon fibers (722).

2. A shielded cable according to claim 1, characterized in that: The inner conductor (1) is a tinned copper wire.

3. A shielded cable according to claim 1, characterized in that: The insulating layer (2) is made of FEP.

4. A shielded cable according to claim 1, characterized in that: The filling layer (3) is formed by twisting Kevlar wire and copper wire.

5. A shielded cable according to claim 1, characterized in that: The shielding layer (4) is woven from tinned copper wires.

6. A shielded cable according to claim 1, characterized in that: The outer sheath (5) is made of TPE.

7. A shielded cable according to claim 1, characterized in that: The wrapping layer (6) is made of polyethylene.

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