CN220691763U

CN220691763U - Attenuation-reduced, tightly shielded coaxial cable

Info

Publication number: CN220691763U
Application number: CN202322171799.8U
Authority: CN
Inventors: 王成旺; 高旭皓; 蔡长威; 刘书鑫; 王礼国
Original assignee: Zhejiang Products Zhongda Cable Co ltd
Current assignee: Zhejiang Products Zhongda Cable Co ltd
Priority date: 2023-08-14
Filing date: 2023-08-14
Publication date: 2024-03-29
Anticipated expiration: 2033-08-14

Abstract

The utility model discloses an attenuation-inhibiting reinforced sealed shielding coaxial cable, which comprises an inner conductor formed by twisting a plurality of silver-plated copper sector conductors around a soft copper stranded wire, wherein the outer part of the inner conductor is sequentially coated with a foaming FEP extrusion inner insulating layer and an iron powder polyethylene resin composite wrapping layer, a plurality of silver-plated copper wires with the diameters of 0.02mm to 0.1mm are spirally wound on the outer part of the iron powder polyethylene resin composite wrapping layer side by side to form a silver-plated copper wire winding shielding layer, the outer surface of the silver-plated copper wire winding shielding layer is electroplated to form a tin-plated shielding layer, the thickness of the tin-plated shielding layer is not less than 0.01mm and not more than 0.05mm, and the outer part of the tin-plated shielding layer is sequentially coated with a ferrite film wrapping layer and an FEP extrusion outer sheath. The coaxial cable has better bending resistance, the copper wires of the shielding layer are tightly sealed, the multi-layer shielding reinforcement inhibits signal transmission attenuation, the noise interference resistance is stronger, and the durability is better.

Description

Attenuation-inhibiting reinforced sealed shielding coaxial cable

Technical Field

The utility model relates to the technical field of cables, in particular to an attenuation-inhibiting reinforced type closely-shielded coaxial cable.

Background

Coaxial cable is one of the main varieties of wire and cable. The field environment of industrial applications is complex, and electromagnetic noise radiation or conduction (EMI) may severely interfere with the proper operation of the equipment, and in this process, an important type of carrier for electromagnetic noise propagation is the various cables used in the production line equipment. On automatic industrial manufacturing production line, electric connection and control such as miniature robot and electronic machine need be applied to coaxial cable, and coaxial cable that adopts copper wire to wrap shielding layer is experienced repeatedly crooked in the course of working, easily appears loosely, causes shielding density to reduce to copper wire is wrapped the space that forms and is made inside signal or outside noise extremely easy to pass the space and cause leakage or signal interference, and signal transmission attenuation is big, and interference killing feature weakens, and signal transmission characteristic is unstable, and then influences the electrical characteristic of cable.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model aims to provide the attenuation-inhibiting reinforced closely-shielded coaxial cable which has better bending resistance, closely-shielded copper wires, stronger noise-resisting interference capability and better durability, and the attenuation of signal transmission is inhibited by multi-layer shielding reinforcement.

The utility model solves the technical problems through the following technical proposal.

The attenuation-enhanced sealed shielding coaxial cable comprises an inner conductor formed by twisting a plurality of silver-plated copper sector conductors around a soft copper stranded wire, wherein an inner insulating layer and an iron powder polyethylene resin composite wrapping layer are sequentially coated outside the inner conductor in a coating foaming manner, a plurality of silver-plated copper wires with diameters of 0.02mm to 0.1mm are spirally wound side by side outside the iron powder polyethylene resin composite wrapping layer to form a silver-plated copper wire winding shielding layer, the outer surface of the silver-plated copper wire winding shielding layer is electroplated to form a tin-plated shielding layer, the thickness of the tin-plated shielding layer is not less than 0.01mm and not more than 0.05mm, and a ferrite film wrapping layer and an FEP extrusion outer sheath are sequentially coated outside the tin-plated shielding layer.

Preferably, the soft copper stranded wire is formed by stranding a plurality of soft copper wires with diameters of 0.05mm to 0.08 mm.

Preferably, the silver-plated copper sector conductor is formed by twisting a plurality of silver-plated copper strands, which are twisted in opposite directions with respect to the strands, and are compressed into a sector structure, wherein the silver-plated copper strands are formed by twisting a plurality of silver-plated copper monofilaments with diameters of 0.02mm to 0.04 mm.

Preferably, the lay length of the silver-plated copper strand is 10 to 25 times the outer diameter of the silver-plated copper strand.

Preferably, the iron powder polyethylene resin composite wrapping layer is of an iron powder resin composite belt unidirectional spiral lapping wrapping structure.

Preferably, the foamed FEP is extruded with an inner insulation layer thickness of 1mm to 2mm.

Preferably, the iron powder polyethylene resin composite clad layer has a thickness of 40 μm to 180 μm.

Preferably, the ferrite film wrapping layer has a thickness of 3 μm to 8 μm.

Preferably, the FEP extrusion coating outer sheath has a thickness of 0.45mm to 1.6mm.

Preferably, the foamed FEP extrusion coating inner insulation layer is a foamed FEP resin layer having a foaming ratio of 40% to 50%.

The utility model has the beneficial effects that:

1. the inner conductor is formed by twisting silver-plated copper sector conductors around soft copper stranded wires, so that the conductors have good mechanical strength and flexibility, the bending resistance is enhanced, the occurrence of broken wires is reduced, stable and reliable electrical characteristics are ensured, and the durability is better.

2. The three-layer shielding layer structure is formed by the iron powder polyethylene resin composite wrapping layer, the silver plating copper wire winding shielding layer and the ferrite film wrapping layer, the shielding layer of the silver plating copper wire winding structure is higher in conductivity and better in electrical property, the silver plating copper wires spirally wound side by side are closely connected into a whole through the tin plating shielding layer, the situation that the silver plating copper wires are loose and broken is effectively avoided, the diameter of the silver plating copper wires and the thickness of the tin plating shielding layer are optimized, the bending resistance performance is improved, the holes formed by the silver plating copper wire winding shielding layer can be effectively filled, the better shielding density is ensured, the ferrite film wrapping layer is added outside the tin plating shielding layer, such as the Ni-Zn ferrite film wrapping layer, the stress concentration of the tin plating shielding layer is slowed down, the torque force is reduced, the situation that the tin plating shielding layer cracks is prevented, the signal transmission attenuation is strengthened, the anti-interference performance is improved, the stable shielding effect is ensured, and the durability is better.

Drawings

FIG. 1 is a schematic cross-sectional view of an embodiment of the present utility model.

In the figure: 1-soft copper stranded wires, 2-silver-plated copper sector conductors, 3-inner conductors, 4-foaming FEP extrusion coating inner insulating layers, 5-iron powder polyethylene resin composite wrapping layers, 6-silver-plated copper wire winding shielding layer, 7-tin-plated shielding layer, 8-ferrite film winding layer and 9-FEP extrusion coating outer sheath.

Description of the embodiments

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

As shown in fig. 1, the attenuation-suppressing reinforced type closely shielded coaxial cable according to the embodiment of the present utility model includes an inner conductor 3 formed by twisting a plurality of silver-plated copper sector conductors 2 around a soft copper stranded wire 1. Specifically, the soft copper stranded wire 1 is formed by stranding a plurality of soft copper wires with diameters of 0.05mm to 0.08 mm. The silver-plated copper sector conductor 2 is formed by twisting a plurality of silver-plated copper strands and compressing the silver-plated copper strands into a sector structure, the silver-plated copper strands are formed by twisting a plurality of silver-plated copper monofilaments with diameters of 0.02mm to 0.04mm, the twisting directions of the silver-plated copper monofilaments are opposite to the twisting directions of the strands, and further, the twisting distance of the silver-plated copper strands is 10 to 25 times of the outer diameter of the silver-plated copper strands.

The inner conductor 3 is sequentially coated with a foaming FEP extrusion inner insulating layer 4 and an iron powder polyethylene resin composite wrapping layer 5, and preferably the foaming FEP extrusion inner insulating layer 4 is a foaming FEP resin layer with the foaming rate of 40-50%. The thickness of the foamed FEP extrusion inner insulation layer 4 is 1mm to 2mm. In one embodiment, the iron powder polyethylene resin composite wrapping layer 5 is an iron powder resin composite belt unidirectional spiral lapping and wrapping structure. The thickness of the iron powder polyethylene resin composite wrapping layer 5 is 40-180 mu m. The iron powder polyethylene resin composite wrapping layer 5 is formed by spirally wrapping a plurality of silver-plated copper wires with diameters of 0.02mm to 0.1mm side by side to form a silver-plated copper wire wrapping shielding layer 6, the outer surface of the silver-plated copper wire wrapping shielding layer 6 is electroplated to form a tin-plated shielding layer 7, the thickness of the tin-plated shielding layer 7 is not less than 0.01mm and not more than 0.05mm, and the outer portion of the tin-plated shielding layer 7 is sequentially wrapped with a ferrite film wrapping layer 8 and an FEP extrusion outer sheath 9. The ferrite film wrapping layer 8 has a thickness of 3 μm to 8 μm. The FEP extrusion coating outer sheath 9 has a thickness of 0.45mm to 1.6mm.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims

1. The attenuation-enhanced sealed shielding coaxial cable is characterized in that: including forming inner conductor (3) around soft copper stranded conductor (1) transposition by a plurality of silver-plated copper fan-shaped conductor (2), the outside cladding foaming FEP extrusion in proper order of inner conductor (3) is insulating layer (4) and the compound cladding (5) of iron powder polyethylene resin, and a plurality of diameters are 0.02mm to 0.1mm silver-plated copper wire side by side spiral winding be in the outside silver-plated copper wire winding shielding layer (6) that forms of iron powder polyethylene resin is compound cladding (5), silver-plated copper wire winding shielding layer (6) surface electroplate and form tin-plated shielding layer (7), tin-plated shielding layer (7) thickness is not less than 0.01mm and is not more than 0.05mm, the outside cladding of tin-plated shielding layer (7) has ferrite film cladding (8) and FEP extrusion oversheath (9) in proper order.

2. The attenuation-resistant, enhanced, hermetically sealed and shielded coaxial cable of claim 1, wherein: the soft copper stranded wires (1) are formed by stranding a plurality of soft copper wires with diameters of 0.05mm to 0.08 mm.

3. The attenuation-resistant, enhanced, hermetically sealed and shielded coaxial cable of claim 1, wherein: the silver-plated copper sector conductor (2) is formed by twisting a plurality of silver-plated copper strands, the silver-plated copper strands are twisted into a sector structure, the silver-plated copper strands are formed by twisting a plurality of silver-plated copper monofilaments with diameters of 0.02mm to 0.04mm, and the twisting directions of the silver-plated copper monofilaments are opposite to the twisting directions of the strands.

4. The attenuation-resistant, enhanced, hermetically sealed and shielded coaxial cable of claim 3, wherein: the lay length of the silver-plated copper strand is 10 to 25 times the outer diameter of the silver-plated copper strand.

5. The attenuation-resistant, enhanced, hermetically sealed and shielded coaxial cable of claim 1, wherein: the iron powder polyethylene resin composite wrapping layer (5) is of a one-way spiral lapping and wrapping structure of the iron powder resin composite belt.

6. The attenuation-resistant, enhanced, hermetically sealed and shielded coaxial cable of claim 1, wherein: the thickness of the inner insulating layer (4) of the foamed FEP extrusion is 1mm to 2mm.

7. The attenuation-resistant, enhanced, hermetically sealed and shielded coaxial cable of claim 1, wherein: the thickness of the iron powder polyethylene resin composite wrapping layer (5) is 40-180 mu m.

8. The attenuation-resistant, enhanced, hermetically sealed and shielded coaxial cable of claim 1, wherein: the thickness of the ferrite film wrapping layer (8) is 3-8 mu m.

9. The attenuation-resistant, enhanced, hermetically sealed and shielded coaxial cable of claim 1, wherein: the thickness of the FEP extrusion coating outer sheath (9) is 0.45mm to 1.6mm.

10. The attenuation-resistant, enhanced, hermetically sealed and shielded coaxial cable of claim 1, wherein: the foamed FEP extrusion coating inner insulating layer (4) is a foamed FEP resin layer with a foaming rate of 40% to 50%.