Salt-spray-resistant corrosion-resistant high-performance coaxial cable

Abstract

The utility model relates to the technical field of wires and cables, in particular to a salt-mist-resistant corrosion-resistant high-performance coaxial cable, which comprises a conductor. The outer wall of the conductor is coated with the semi-conductive structure layer; the insulating layer is extruded on the outer wall of the semi-conductive structure layer; the inner shielding layer coats the outer wall of the insulating layer; the outer shielding layer wraps the outer wall of the inner shielding layer; and the sheath layer is extruded on the outer wall of the outer shielding layer. According to the coaxial cable provided by the utility model, the double shielding layers are adopted, the water-blocking paste is filled between the double shielding layers, and the water-blocking paste can permeate into a gap between the insulating layer and the sheath layer to prevent water vapor from entering, so that the corrosion of the conductor, the shielding layers and the insulating layer can be effectively avoided in a high-salt and high-humidity environment, and the service life of the cable is prolonged. And meanwhile, the combination of the double shielding layers can further enhance the shielding effect and the mechanical property of the cable, so that the cable has higher transmission reliability and weather-proof reliability.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric wire and cable, and particularly to a salt-fog-proof and corrosion-resistant high-performance coaxial cable. BACKGROUND

[0002] Coaxial cable is a special electrical transmission line, which usually includes a center conductor, an insulating layer, a shielding layer and an outer sheath. It is often used in harsh environments such as shipboard, space exploration, satellite, etc. The cable has high requirements for temperature resistance, weather resistance and corrosion resistance. The center conductor is usually made of tinned copper conductor, the insulating layer is made of polymer material with good corrosion resistance, the shielding layer is usually made of a layer of metal braid or aluminum foil, or both are used to provide better shielding effect. The outer sheath is used to protect the internal structure of the cable from physical damage, moisture, chemical corrosion and other external factors, and is usually made of corrosion-resistant and wear-resistant materials such as PVC and PE.

[0003] In the design of the cable, the shielding layer has a great influence on the overall corrosion resistance of the cable. If the copper foil / aluminum foil is wrapped too tightly, the bending performance of the cable will be reduced, and if the copper foil / aluminum foil is wrapped too loosely, gaps will be formed between the shielding layer and the insulating layer / outer sheath, causing the shielding layer to be corroded. SUMMARY

[0004] In view of the technical problems existing in the prior art coaxial cable, the utility model provides a salt-fog-proof and corrosion-resistant high-performance coaxial cable, which comprises:

[0005] a conductor;

[0006] a semi-conductive structure layer wrapped around the outer wall of the conductor;

[0007] an insulating layer wrapped around the outer wall of the semi-conductive structure layer;

[0008] an inner shielding layer wrapped around the outer wall of the insulating layer;

[0009] an outer shielding layer wrapped around the outer wall of the inner shielding layer;

[0010] a sheath layer wrapped around the outer wall of the outer shielding layer;

[0011] Among them, the inner shielding layer includes a plurality of hole structures, the first end of the hole structure is connected to the outer wall of the insulating layer, and the second end is connected to the inner wall of the outer shielding layer; the inner shielding layer and the outer shielding layer are filled with water-blocking paste, and a water-blocking paste layer is formed between the outer layer of the insulating layer and the inner layer of the sheath layer.

[0012] Preferably, the inner shielding layer includes a copper wire braid structure, and the braid density of the copper wire braid structure is between 70-80%.

[0013] Preferably, the outer shielding layer comprises a longitudinal wrapping or a round wrapping of copper / aluminum tape.

[0014] Preferably, the outer shielding layer comprises a round wrapping layer of copper tape, the round wrapping coverage of the copper tape is less than 10%, and the round wrapping layer is one layer.

[0015] Preferably, the thickness of the inner shielding layer is greater than the thickness of the outer shielding layer.

[0016] Preferably, the semi-conductive structure layer and the insulating layer are formed into the insulating layer on the surface of the conductor by double-layer co-extrusion.

[0017] Preferably, the conductor comprises a tin-plated copper conductor.

[0018] Preferably, the insulating layer comprises a foamed polyethylene insulating layer.

[0019] Preferably, the sheath layer comprises a polyvinyl chloride sheath.

[0020] Compared with the prior art, the anti-salt-fog corrosion-resistant high-performance coaxial cable has the following advantages:

[0021] The anti-salt-fog corrosion-resistant high-performance coaxial cable disclosed by the present application adopts double-layer shielding layers, and the double-layer shielding layers are filled with water-blocking paste, the water-blocking paste can penetrate into the gap between the insulating layer and the sheath layer, and the water vapor is prevented from entering, so that the corrosion of the conductor, the shielding layer and the insulating layer can be effectively avoided in a high-salt and high-humidity corrosive environment, and the shielding effect and the mechanical performance of the cable are further enhanced by the combination of the double-layer shielding layers, the penetration and interference of electromagnetic waves are reduced, and the cable has higher transmission reliability and weathering reliability. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures can be represented by a like numeral. For purposes of clarity, not every component can be called out in every drawing. Embodiments of various aspects of the present application will now be described, by way of example, with reference to the drawings, in which:

[0023] Figure 1 is a cross-sectional structure schematic view of the anti-salt-fog corrosion-resistant high-performance coaxial cable shown in the present application.

[0024] Figure 2 is a structure schematic view of the anti-salt-fog corrosion-resistant high-performance coaxial cable shown in the present application. DETAILED DESCRIPTION

[0025] In order to better understand the technical content of the present application, specific embodiments are described below with reference to the accompanying drawings.

[0026] In combination Figure 1and Figure 2 As shown in the drawings, the utility model provides a kind of salt-fog-resistant corrosion-resistant high-performance coaxial cable, including conductor 1, semiconductive structure layer 2, insulating layer 3, inner shield layer 4, outer shield layer 5 and sheath layer 7 distributed from inside to outside.

[0027] Optionally, conductor 1 uses stranded tinned copper conductor or single tinned copper wire.

[0028] Further, semiconductive structure layer 2 is coated on the outer wall of conductor 1, and insulating layer 3 is extruded on the outer wall of semiconductive structure layer 2.

[0029] Among them, semiconductive structure layer 2 can effectively control electric field intensity, ensure the uniformity of electric field distribution, reduce the partial discharge intensity of insulating layer 3, thereby prolong the service life of cable.

[0030] In optional embodiments, if conductor 1 uses single tinned copper wire, semiconductive structure layer 2 and insulating layer 3 are double-layer co-extruded insulating layer formed on the surface of conductor 1.

[0031] In another embodiment, if conductor 1 uses multiple stranded tinned copper wires, semiconductive structure layer 2 uses semiconductive non-woven wrap layer to avoid scratching insulating layer 3 by stranded tinned copper wires.

[0032] Further, insulating layer 3 can be foamed polyethylene insulating layer. In this way, the weight of the cable can be reduced, and the flexibility and bending performance of the cable can be increased.

[0033] In the above embodiment, in order to increase the water-blocking ability between insulating layer 3, shielding layer and sheath layer 7, water-blocking paste is filled between inner shield layer 4 and outer shield layer 5. In this way, by arranging double shielding, a space for accommodating water-blocking paste can be formed, which helps to form water-blocking paste layer 6 between the outer layer of insulating layer 3 and the inner layer of sheath layer 7.

[0034] Optionally, inner shield layer 4 includes a plurality of hole structures, the first end of the hole structure is connected to the outer wall of insulating layer 3, and the second end is connected to the inner wall of outer shield layer 5.

[0035] In this way, the water-blocking paste filled outside the inner shield layer 4 can penetrate to the surface of the insulating layer 3, especially can effectively fill the gaps and cracks in the shielding layer, prevent moisture and humidity from penetrating into the inside of the cable, thereby protecting the insulating layer 3, shielding layer and conductor 1 of the cable from damage.

[0036] In a specific embodiment, inner shield layer 4 includes copper wire braiding structure, and the braiding density of copper wire braiding structure is between 70-80%, and outer shield layer 5 includes longitudinally wrapped or wrapped copper tape / aluminum tape.

[0037] In the filling of water-blocking paste, after the inner shielding layer 4 is woven, the water-blocking paste can be applied on the surface of the inner shielding layer 4, and then the copper tape / aluminum tape is wrapped around or longitudinally wrapped on the surface coated with the water-blocking paste.

[0038] It can be understood that the copper wire woven structure is a mesh structure formed by weaving multiple thin copper wires, which can provide electromagnetic interference protection in multiple directions and has a certain shielding effect on electromagnetic waves of different angles. The copper tape / aluminum tape shielding layer can provide a continuous and uniform shielding surface, which is particularly effective for shielding planar electromagnetic waves and can generally provide better shielding effect in high-frequency applications. The combination of the two can further enhance the shielding effect and reduce the penetration and interference of electromagnetic waves.

[0039] In an optional embodiment, the outer shielding layer 5 comprises a copper tape wrapping layer, the wrapping coverage rate of the copper tape is less than 10%, and the number of wrapping layers is one.

[0040] In this way, the water-blocking paste on the surface of the inner shielding layer 4 can penetrate into the space between the outer shielding layer 5 and the sheath layer 7 through the gap covered by the copper tape, so as to fill the space between the insulating layer 3 and the sheath layer 7 and prevent the entry of water vapor.

[0041] In an optional embodiment, the thickness of the inner shielding layer 4 is greater than the thickness of the outer shielding layer 5, so that the mechanical strength of the cable as a whole can be improved, and more water-blocking paste can be accommodated.

[0042] In an optional embodiment, the sheath layer 7 comprises a polyvinyl chloride sheath. The polyvinyl chloride sheath has corrosion resistance, wear resistance, high temperature resistance, and cold resistance, and can meet the requirements of use in high-salt and high-humidity environments.

[0043] In combination with the above embodiments, the coaxial cable disclosed by the present application adopts double shielding layers, and the water-blocking paste is filled between the double shielding layers. The water-blocking paste can penetrate into the gap between the insulating layer and the sheath layer to prevent the entry of water vapor. Therefore, in high-salt and high-humidity environments, corrosion of the conductor, the shielding layer, and the insulating layer can be effectively avoided, and the combination of the double shielding layers can further enhance the shielding effect and mechanical properties of the cable, reduce the penetration and interference of electromagnetic waves, and make the cable have higher transmission reliability and weathering reliability.

[0044] Although the present application has been disclosed with reference to the preferred embodiments, it is not intended to limit the present application. Those skilled in the art can make various modifications and improvements without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application shall be subject to the scope defined by the claims.

Claims

1. A salt-fog resistant, corrosion-proof, high-performance coaxial cable, characterized by, The utility model relates to a kind of cable, including: Conductor (1); Semi-conductive structure layer (2), covering the outer wall of the conductor (1); Insulating layer (3), extruded in the outer wall of the semi-conductive structure layer (2); Inner shielding layer (4), covering the outer wall of the insulating layer (3); Outer shielding layer (5), covering the outer wall of the inner shielding layer (4); Sheath layer (7), extruded in the outer wall of the outer shielding layer (5); Wherein, the inner shielding layer (4) includes a plurality of hole structures, the first end of the hole structure is connected to the outer wall of the insulating layer (3), the second end is connected to the inner wall of the outer shielding layer (5), and water-blocking paste is filled between the inner shielding layer (4) and outer shielding layer (5), and water-blocking paste layer (6) is formed between the outer layer of the insulating layer (3) and the inner layer of sheath layer (7).

2. The salt-fog corrosion-resistant high-performance coaxial cable according to claim 1, characterized in that, The inner shielding layer (4) includes copper wire braiding structure, and the braiding density of the copper wire braiding structure is between 70~80%.

3. The salt-fog corrosion-resistant high-performance coaxial cable according to claim 1, characterized in that, The outer shielding layer (5) includes longitudinal package or around copper belt / aluminum belt.

4. The salt-fog corrosion-resistant high-performance coaxial cable according to claim 3, characterized in that, The outer shielding layer (5) includes copper belt around package layer, and the around package coverage of copper belt is less than 10%, and the number of around package layers is one layer.

5. The salt-fog corrosion-resistant high-performance coaxial cable according to claim 1, characterized in that, The thickness of the inner shielding layer (4) is greater than the thickness of the outer shielding layer (5).

6. The salt-fog corrosion-resistant high-performance coaxial cable according to claim 1, characterized in that, The semi-conductive structure layer (2) and insulating layer (3) are double-layer co-extruded insulation layers formed on the surface of the conductor (1).

7. The salt-fog corrosion-resistant high-performance coaxial cable according to claim 1, characterized in that, The conductor (1) includes tin-plated copper conductor.

8. The salt-fog corrosion-resistant high-performance coaxial cable according to claim 1, characterized in that, The insulating layer (3) includes foamed polyethylene insulating layer.

9. The salt-fog corrosion-resistant high-performance coaxial cable according to claim 1, characterized in that, The sheath layer (7) includes polyvinyl chloride sheath.

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