CN216250148U - Wire break proof lightweight coaxial cable - Google Patents

Abstract

The utility model discloses an anti-breakage light-weight coaxial cable, which comprises an elliptical central core strip, wherein the central core strip is formed by twisting a plurality of para-type wholly aromatic copolyamide stretched fibers, and the long axis of the central core strip is not If it exceeds 1mm, the short axis of the central core bar shall not be less than 0.1mm, and a number of tinned copper monofilaments with a wire diameter not exceeding 0.2mm shall be stranded around the center core bar to form an inner conductor. The outer diameter of the inner conductor shall not exceed 1.6mm, and the inner conductor shall be The laying distance is five to twenty times the outer diameter of the inner conductor, and the outer part of the inner conductor is sequentially covered with a thermoplastic polyurethane inner adhesive layer, a fluororesin insulating layer, a copper foil layer, a copper wire wrapping shielding layer, and a thermoplastic polyurethane outer bonding layer. layer and fluororesin sheath layer, and the thickness of the fluororesin insulating layer is one-fifth to one-third of the outer diameter of the inner conductor. The cable is based on lightweight production, with better bending resistance, less conductor deformation and wire breakage, and durable use.

Description

Wire break proof lightweight coaxial cable

technical field

The present application relates to the technical field of cables, and in particular, to an anti-breakage light-weight coaxial cable.

Background technique

Coaxial cable is one of the main varieties of wire and cable. Coaxial cables need to have good flexibility and shielding performance. In the automated industrial manufacturing production line, the electrical connection and control of small robots and electronic machines need to be applied to coaxial cables with high flexibility and bending resistance, which must also have good electrical characteristics for long-distance transmission. . However, when the ordinary coaxial cable is subjected to repeated bending, the load stress applied to the conductor can easily cause the conductor to deform and break, which greatly affects the electrical characteristics and is not durable for use.

Utility model content

Aiming at the deficiencies of the prior art, the technical problem to be solved in the present application is to provide a light-weight coaxial cable with anti-breakage, which is based on lightweight fabrication, has better bending resistance, is less prone to conductor deformation and broken wires, and is durable in use.

The present application solves the above technical problems through the following technical solutions.

An anti-breakage light-weight coaxial cable, comprising an oval central core strip, the central core strip is composed of a plurality of para-type wholly aromatic copolyamide drawn fibers stranded, and the long axis of the central core strip does not exceed 1mm, The short axis of the central core bar is not less than 0.1mm, and a number of tinned copper monofilaments with a wire diameter not exceeding 0.2mm are twisted around the center core bar to form an inner conductor, and the outer diameter of the inner conductor is not more than 1.6mm. , the laying distance of the inner conductor is five to twenty times the outer diameter of the inner conductor, and the outer part of the inner conductor is sequentially covered with a thermoplastic polyurethane inner adhesive layer, a fluororesin insulating layer, a copper foil layer, and a copper wire winding. The shielding layer, the thermoplastic polyurethane outer adhesive layer and the fluororesin sheath layer are covered, and the thickness of the fluororesin insulating layer is one fifth to one third of the outer diameter of the inner conductor.

Preferably, the long axis of the central core bar is not more than 0.8 mm, and the short axis of the central core bar is not less than 0.2 mm.

Preferably, the outer diameter of the inner conductor is 0.5mm to 1.4mm.

Preferably, the wire diameter of the tinned copper monofilament is 0.02 mm to 0.16 mm.

Preferably, the thickness of the copper foil layer is 5 μm to 10 μm.

Preferably, the copper wire wrapping shielding layer is a mixed unidirectional spiral winding structure of soft copper wires with two different wire diameters and a wire diameter ratio between 0.9 and 1, and the wire diameter of the soft copper wire is 0.02mm to 0.05mm.

Preferably, the thickness of the thermoplastic polyurethane inner adhesive layer and the thermoplastic polyurethane outer adhesive layer are both 8 micrometers to 20 micrometers.

Preferably, the fluororesin insulating layer and the fluororesin sheath layer are both PFA, FEP or PTFE fluororesin layers.

Preferably, the thickness of the fluororesin sheath layer is 0.5mm to 1.8mm.

Beneficial effects of this application:

1. The structure of the central core strip is oval. When the cable is subjected to bending, the central core strip is subjected to extrusion deformation and becomes flat, so that there is a misalignment between the center point of the center core strip and the center point of the inner conductor. It can effectively relieve the load stress applied to the inner conductor, reduce the local stress concentration of the inner conductor, reduce the occurrence of conductor deformation and wire breakage, improve the flexibility and anti-bending characteristics, and help the conductor to be made lighter and smaller in diameter. , maintain stable electrical characteristics, and better durability.

2. The copper foil layer and the copper wire wrapping shielding layer together form a shielded conductor. The copper foil layer can effectively fill the gap formed by the braiding of the copper wire wrapping shielding layer, effectively reduce the signal attenuation, improve the anti-interference performance, and the shielding performance is stable. .

3. The inner conductor and the fluororesin insulating layer are tightly bonded by the thermoplastic polyurethane inner adhesive layer, which can reduce the local stress concentration of the inner conductor, reduce the torque force, and greatly improve the flexibility of the inner conductor.

Description of drawings

FIG. 1 is a schematic cross-sectional structure diagram of an embodiment of the present application.

Description of reference numbers:

1- Center core strip, 2- Inner conductor, 3- Thermoplastic polyurethane inner bonding layer, 4- Fluorine resin insulating layer, 5- Copper foil layer,

6-Copper wire wrapping shielding layer, 7-thermoplastic polyurethane outer bonding layer, 8-fluororesin sheath layer.

Detailed ways

The terms used in the embodiments of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application. The following will describe the embodiments of the embodiments of the present application in detail with reference to the accompanying drawings.

Referring to FIG. 1 , the anti-breakage light-weight coaxial cable according to the embodiment of the present application includes an elliptical central core bar 1, and the central core bar 1 is formed by twisting a plurality of para-type wholly aromatic copolyamide drawn fibers. The long axis of the center core bar 1 is not more than 1mm, the short axis of the center core bar 1 is not less than 0.1mm, further, the long axis of the center core bar 1 is not more than 0.8mm, the center core bar 1 The short axis is not less than 0.2mm. A plurality of tinned copper monofilaments with a wire diameter not exceeding 0.2 mm are twisted around the outside of the central core bar 1 to form an inner conductor 2. Preferably, the wire diameter of the tinned copper monofilaments is 0.02 mm to 0.16 mm. The outer diameter of the inner conductor 2 does not exceed 1.6 mm, and further, the outer diameter of the inner conductor 2 is 0.5 mm to 1.4 mm. The lay length of the inner conductor 2 is five to twenty times the outer diameter of the inner conductor 2 .

The inner conductor 2 is sequentially covered with a thermoplastic polyurethane inner adhesive layer 3, a fluororesin insulating layer 4, a copper foil layer 5, a copper wire wrapping shielding layer 6, a thermoplastic polyurethane outer adhesive layer 7 and a fluororesin sheath layer. 8. Preferably, the thickness of the thermoplastic polyurethane inner adhesive layer 3 and the thermoplastic polyurethane outer adhesive layer 7 are both 8 microns to 20 microns. The thickness of the fluororesin insulating layer 4 is one-fifth to one-third of the outer diameter of the inner conductor 2 . The thickness of the copper foil layer 5 is 5 μm to 10 μm. In one embodiment, the copper wire wrapping shielding layer 6 is a mixed unidirectional spiral winding structure of soft copper wires with two different wire diameters and a wire diameter ratio between 0.9 and 1. The soft copper wire diameter 0.02mm to 0.05mm. The fluororesin insulating layer 4 and the fluororesin sheath layer 8 are, for example, PFA, FEP or PTFE fluororesin layers. The thickness of the fluororesin sheath layer 8 is preferably 0.5 mm to 1.8 mm.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, but not to limit them; It should be understood that: it is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the embodiments of the present application The scope of the technical solutions of each embodiment.

Claims (9)

1. Prevent disconnected line light coaxial cable, characterized by: comprises an elliptical central core bar (1), wherein the central core bar (1) is formed by twisting a plurality of para-type wholly aromatic copolyamide drawn fibers, the long axis of the central core bar (1) is not more than 1mm, the short axis of the central core bar (1) is not less than 0.1mm, a plurality of tin-plated copper monofilaments with the wire diameter not more than 0.2mm surround the outside of the central core bar (1) and are twisted to form an inner conductor (2), the outer diameter of the inner conductor (2) is not more than 1.6mm, the lay length of the inner conductor (2) is five times to twenty times of the outer diameter of the inner conductor (2), the outer part of the inner conductor (2) is sequentially coated with a thermoplastic polyurethane inner bonding layer (3), a fluororesin insulating layer (4), a copper foil layer (5), a copper wire wrapping shielding layer (6), a thermoplastic polyurethane outer bonding layer (7) and a fluororesin sheath layer (8), the thickness of the fluororesin insulation layer (4) is one fifth to one third of the outer diameter of the inner conductor (2).

2. The light weight coaxial cable of claim 1, wherein: the long axis of the central core bar (1) is not more than 0.8mm, and the short axis of the central core bar (1) is not less than 0.2 mm.

3. The light weight coaxial cable of claim 1, wherein: the outer diameter of the inner conductor (2) is 0.5mm to 1.4 mm.

4. The light weight coaxial cable of claim 1, wherein: the diameter of the tinned copper monofilament is 0.02mm to 0.16 mm.

5. The light weight coaxial cable of claim 1, wherein: the thickness of the copper foil layer (5) is 5-10 mu m.

6. The light weight coaxial cable of claim 1, wherein: the copper line is two kinds of different wire footpaths and the mixed one-way spiral winding structure of annealed copper line that the wire footpath ratio is between 0.9 to 1 around covering shielding layer (6), the annealed copper line wire footpath is 0.02mm to 0.05 mm.

7. The light weight coaxial cable of claim 1, wherein: the thickness of the thermoplastic polyurethane inner bonding layer (3) and the thickness of the thermoplastic polyurethane outer bonding layer (7) are both 8-20 microns.

8. The light weight coaxial cable of claim 1, wherein: the fluororesin insulation layer (4) and the fluororesin sheath layer (8) are both PFA, FEP or PTFE fluororesin layers.

9. The light weight coaxial cable of claim 1, wherein: the thickness of the fluororesin sheath layer (8) is 0.5mm to 1.8 mm.

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