CN220569459U - Heat-conducting type sealed shielding coaxial cable - Google Patents

Abstract

The utility model discloses a heat-conducting type closely-shielded coaxial cable, which comprises an annular inner conductor formed by twisting a plurality of tin-plated copper sector conductors, wherein a stainless steel wire stranded wire is sleeved in a central hole of the annular inner conductor, insulating lubricating grease is filled in the central hole, and the outer part of the inner conductor is sequentially coated with a foaming PFA extrusion inner insulating layer, an ETFE wrapping outer insulating layer, a silver-plated copper wire winding inner shielding layer, a tin-plated outer shielding layer, a heat-conducting silicone grease layer and a PFA extrusion outer sheath. The cable is favorable for timely radiating heat, reduces the cracking and breakage of the outer sheath caused by mechanical stress, inhibits the mechanical stress effect caused by thermal expansion, reduces the occurrence of broken wires and broken wires, improves the bending resistance, ensures the copper wire sealing of the shielding layer and ensures the stability of the shielding performance.

Description

Heat-conducting type sealed shielding coaxial cable

Technical Field

The application relates to the technical field of cables, in particular to a heat conduction type sealed shielding coaxial cable.

Background

Coaxial cable is one of the main varieties of wire and cable. In an automated industrial manufacturing line, electrical connection and control of small robots, electronic machines, and the like are required to be applied to coaxial cables. In the working process, the problem of thermal expansion and cold contraction can occur to the conductor temperature rise due to load change, and the longer the cable line is, the larger the corresponding thermal expansion amount is, the mechanical stress is generated along the axial direction of the cable line, the cable wire breakage and wire breakage can be caused, and the bending resistance characteristic of the cable is weakened. Moreover, after the coaxial cable is subjected to repeated bending under normal working conditions, the copper wire shielding layer is easy to loosen, so that the shielding density is reduced, the anti-interference capability is weakened, the signal attenuation is large, the shielding performance is unstable, meanwhile, the coaxial cable is limited by the heat dissipation performance of the outer sheath, heat cannot be timely dissipated, and the outer sheath is easy to crack and damage under the action of mechanical stress, so that the electrical characteristics are influenced.

Disclosure of Invention

The utility model provides a to the not enough of prior art, the technical problem who solves provides a heat conduction formula driving fit shielding coaxial cable, is favorable to the heat to distribute in time, reduces the oversheath and produces mechanical stress and fracture damage, suppresses the mechanical stress effect that thermal expansion arouses, reduces broken wire and takes place, improves bending resistance characteristic, shielding layer copper wire driving fit, guarantees shielding property's stability.

The technical problems are solved by the following technical scheme.

The utility model provides a heat conduction type driving fit shielding coaxial cable, includes the annular inner conductor that is formed by the transposition of a plurality of tinned copper fan-shaped conductors, the centre bore of annular inner conductor is equipped with stainless steel wire strand wires in the cover, the intussuseption of centre bore is filled with insulating lubricating grease, the outside cladding foaming PFA of inner conductor is crowded to wrap up inner insulation layer, ETFE is wrapped up outer insulation layer, silver-plated copper wire winding inner shield layer, tinned outer shield layer, heat conduction silicone grease layer and PFA crowded package oversheath in proper order, and a plurality of silver-plated copper wires spiral winding side by side are in the ETFE is wrapped up outer insulation layer outside formation silver-plated copper wire winding inner shield layer, the electroplating of silver-plated copper wire winding inner shield layer external surface forms the tinned outer shield layer, tinned outer shield layer outside coating heat conduction silicone grease layer.

Preferably, the tinned copper sector conductor is formed by twisting a plurality of strands and compacting the strands into a sector structure, wherein the strands are formed by twisting a plurality of tinned copper monofilaments, and the twisting direction of the tinned copper monofilaments is opposite to that of the strands.

Preferably, the diameter of the tinned copper monofilament is 0.02mm to 0.1mm.

Preferably, the strand has a lay length of 15 to 30 times the outer diameter of the strand.

Preferably, the stainless steel wire stranded wires are formed by stranding a plurality of stainless steel wires with the wire diameters of 0.05mm to 0.16 mm.

Preferably, the thickness of the foamed PFA extrusion-coated inner insulating layer is 1mm to 2mm.

Preferably, the ETFE wrapping outer insulating layer is an ETFE resin tape multilayer lapping wrapping structure.

Preferably, the ETFE resin tape has a thickness of 20 μm to 80 μm.

Preferably, the tin plating outer shield layer has a thickness of 15 μm to 80 μm.

Preferably, the thermally conductive silicone grease layer has a thickness of 6 μm to 20 μm.

The beneficial effects of this application:

1. the cable is provided with an annular inner conductor structure formed by twisting tin-plated copper sector conductors, stainless steel wire stranded wires are sleeved in a central hole, insulating lubricating grease is filled to increase slidability, the tin-plated copper sector conductors are formed by twisting tin-plated copper monofilaments, and as the linear expansion coefficient of the stainless steel wires is smaller than that of the tin-plated copper monofilaments, the extension of the tin-plated copper sector conductors is larger than that of the stainless steel wires, so that the extension of the cable is balanced, the extension force of the cable end is restrained, the length change of a cable line caused by thermal expansion is restrained, the mechanical stress generated in the axial direction of the cable line is eliminated, the harm caused by thermal expansion is effectively reduced, the tensile strength of the stainless steel wires is larger than that of the tin-plated copper monofilaments, the occurrence of broken wires is restrained, and the bending resistance characteristic of the cable is improved.

2. And a heat conduction silicone grease layer is added between the tinned outer shielding layer and the PFA extruded outer sheath, so that heat under the working state of the cable is timely dissipated, the thermal expansion effect is reduced, the cracking and breakage phenomenon caused by mechanical stress generated by the outer sheath is reduced, and the durability is improved.

3. The inner shielding layer of the silver-plated copper wire winding structure is higher in conductivity and better in electrical property, the stability of shielding effect is guaranteed, the silver-plated copper wires spirally wound side by side are closely connected into a whole through the tin-plated outer shielding layer, bending resistance is greatly improved, the situation that the silver-plated copper wires are loose and broken is effectively avoided, the tin-plated outer shielding layer can effectively fill the holes formed by the silver-plated copper wire winding inner shielding layer, better shielding density is guaranteed, shielding performance is enhanced, signal attenuation is reduced, anti-interference capability is improved, and stable and reliable shielding performance is guaranteed.

Drawings

The following drawings are intended to facilitate the description of the preferred embodiments and are not intended to limit the scope of the present application.

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

In the figure: a 1-tin-plated copper sector conductor, a 2-annular inner conductor, a 3-stainless steel wire stranded wire, a 4-foaming PFA extrusion inner insulating layer, a 5-ETFE wrapping outer insulating layer, 6-silver-plated copper wires are wound on the inner shielding layer, 7-tin-plated outer shielding layer, 8-heat-conducting silicone grease layer and 9-PFA extrusion outer sheath.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

As shown in fig. 1, the heat conductive type closely shielded coaxial cable according to the embodiment of the present application includes an annular inner conductor 2 formed by twisting a plurality of tin-plated copper sector conductors 1, specifically, the tin-plated copper sector conductors 1 are twisted by a plurality of strands and are compressed into a sector structure, the strands are formed by twisting a plurality of tin-plated copper monofilaments, further, the diameter of the tin-plated copper monofilaments is 0.02mm to 0.1mm, the twisting direction of the tin-plated copper monofilaments is opposite to the twisting direction of the strands, and further, the twisting pitch of the strands is 15 to 30 times the outer diameter of the strands. The stainless steel wire stranded wires 3 are sleeved in the central hole of the annular inner conductor 2, and specifically, the stainless steel wire stranded wires 3 are formed by stranding a plurality of stainless steel wires with the wire diameters of 0.05mm to 0.16 mm. And the central hole is filled with insulating lubricating grease.

The outer part of the inner conductor 2 is sequentially coated with a foaming PFA extrusion inner insulating layer 4, an ETFE wrapping outer insulating layer 5, a silver-plated copper wire wrapping inner shielding layer 6, a tin-plated outer shielding layer 7, a heat-conducting silicone grease layer 8 and a PFA extrusion outer sheath 9. The thickness of the foaming PFA extrusion inner insulating layer 4 is 1mm to 2mm. The outer surface of the inner shielding layer 6 wound by the silver-plated copper wires is electroplated to form a tin-plated outer shielding layer 7, and the thickness of the tin-plated outer shielding layer 7 is 15-80 mu m. The tin-plated outer shielding layer 7 is externally coated with the heat-conducting silicone grease layer 8, and the thickness of the heat-conducting silicone grease layer 8 is 6-20 mu m. In one embodiment, the ETFE-wrapped outer insulation layer 5 is an ETFE resin tape multilayer lapped-wrapped structure, and further, the ETFE resin tape thickness is 20 μm to 80 μm.

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 claims. 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 (10)

1. Heat conduction type seals shielding coaxial cable, characterized by: including annular inner conductor (2) by the transposition of a plurality of tinned copper sector conductor (1), the centre bore cover of annular inner conductor (2) is equipped with stainless steel wire strand wires (3), the centre bore intussuseption is filled with insulating lubricating grease, the inside insulating layer (4) of cladding foaming PFA crowded package in proper order of inner conductor (2) outside, ETFE winds package outer insulating layer (5), silver-plated copper wire winding inner shield layer (6), tin-plated outer shield layer (7), heat conduction silicone grease layer (8) and crowded package oversheath (9), a plurality of silver-plated copper wires spiral winding side by side are in ETFE winds package outer insulating layer (5) outside forms silver-plated copper wire winding inner shield layer (6), silver-plated copper wire winding inner shield layer (6) surface electroplate forms tin-plated outer shield layer (7), tin-plated outer shield layer (7) outside coating heat conduction silicone grease layer (8).

2. The thermally conductive, hermetically shielded coaxial cable of claim 1, wherein: the tinned copper sector conductor (1) is formed by twisting a plurality of strands and pressing the strands into a sector structure, wherein the strands are formed by twisting a plurality of tinned copper monofilaments, and the twisting direction of the tinned copper monofilaments is opposite to that of the strands.

3. The thermally conductive, hermetically shielded coaxial cable of claim 2, wherein: the diameter of the tinned copper monofilament is 0.02mm to 0.1mm.

4. The thermally conductive, hermetically shielded coaxial cable of claim 2, wherein: the strand has a lay length of 15 to 30 times the outer diameter of the strand.

5. The thermally conductive, hermetically shielded coaxial cable of claim 1, wherein: the stainless steel wire stranded wires (3) are formed by stranding a plurality of stainless steel wires with the wire diameters of 0.05mm to 0.16 mm.

6. The thermally conductive, hermetically shielded coaxial cable of claim 1, wherein: the thickness of the foaming PFA extrusion inner insulating layer (4) is 1mm to 2mm.

7. The thermally conductive, hermetically shielded coaxial cable of claim 1, wherein: the ETFE wrapping outer insulating layer (5) is an ETFE resin strip multilayer lapping and wrapping structure.

8. The thermally conductive, hermetically shielded coaxial cable of claim 7, wherein: the ETFE resin tape thickness is 20 μm to 80 μm.

9. The thermally conductive, hermetically shielded coaxial cable of claim 1, wherein: the tin-plated outer shielding layer (7) has a thickness of 15 μm to 80 μm.

10. The thermally conductive, hermetically shielded coaxial cable of claim 1, wherein: the thickness of the heat-conducting silicone grease layer (8) is 6-20 μm.