Bending-resistant eight-core coaxial cable with grounding copper foil

Abstract

The utility model discloses a bending-resistant eight-core coaxial cable with grounding copper foils, which comprises a polyurethane elastomer core tube, an AFRP reinforced core material is sleeved in the polyurethane elastomer core tube, eight coaxial cable cores are twisted around the outside of the polyurethane elastomer core tube to form a cable core, the outside of the cable core is sequentially coated with a ferrite film wrapping layer and a PVC extruded outer sheath, and the outer sheath is coated with an outer sheath. The coaxial cable core comprises a central conductor, an XLPE insulating layer, a copper-plastic composite longitudinal wrapping shielding layer, an ETFE gap wrapping antifriction layer, a tinned copper wire braided shielding layer and a PVC wrapping layer, and sheet-shaped grounding copper foil is arranged between the tinned copper wire braided shielding layer and the PVC wrapping layer. The cable is better in flexibility and bending resistance by optimizing the structures of the interior of the cable core and the shielding layer, core channeling is avoided when the cable bears bending, the stable electrical characteristic of the cable is ensured, and the durability is better.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to an 8-core coaxial cable with anti-bending grounding copper foil. Background Art

[0002] Coaxial cable is one of the main types of wires and cables. The industrial application site environment is complex, and the radiation or conduction of electromagnetic noise (EMI) may seriously interfere with the normal operation of the equipment. In this process, an important carrier of electromagnetic noise propagation is the various cables used in the production line equipment. In the automated industrial manufacturing production line, coaxial cables are required for the electrical connection and control of small robots and electronic machines. The shielding layer of coaxial cable is usually a double-layer shielding structure of copper foil shielding and copper wire braided shielding, and a copper wire grounding wire is added. The flexibility and bending resistance are average. When the cable is installed, it is easy to cause cracking of the copper foil or aluminum foil shielding layer and breakage of the metal braided shielding layer, which affects the electrical characteristics of the cable and has poor durability. Utility Model Content

[0003] The utility model aims to solve the technical problem of providing a bending-resistant 8-core coaxial cable with grounded copper foil, which optimizes the internal structure of the cable core and the shielding layer, has better flexibility and bending resistance, will not cause core cross-talk when subjected to bending, and ensures stable electrical characteristics of the cable and better durability.

[0004] The utility model solves the above technical problems through the following technical solutions.

[0005] The 8-core coaxial cable with anti-bending grounding copper foil comprises a polyurethane elastomer core tube, the inner sleeve of the polyurethane elastomer core tube is provided with AFRP strengthening core material, 8 coaxial cores are twisted around the outside of the polyurethane elastomer core tube to form a cable core, the outside of the cable core is sequentially coated with a ferrite film winding layer and a PVC extruded outer sheath, the coaxial core comprises a central conductor, an XLPE insulation layer, a copper-plastic composite longitudinal shielding layer, an ETFE gap-wound friction-reducing layer, a tinned copper wire braided shielding layer and a PVC coating layer, a sheet-shaped grounding copper foil is provided between the tinned copper wire braided shielding layer and the PVC coating layer, the diameter of the central conductor is 0.3 mm to 1 mm, the thickness of the sheet-shaped grounding copper foil is 10 μm to 60 μm, and the width of the sheet-shaped grounding copper foil is 1 mm to 3 mm.

[0006] Preferably, the central conductor is formed by concentrically twisting a number of tinned copper monofilaments with a wire diameter of 0.01 mm to 0.05 mm.

[0007] Preferably, the tinned copper wire braided shielding layer is a braided structure of a plurality of tinned copper wires spirally wound in opposite directions, and the wire diameter of the tinned copper wire is 0.05 mm to 0.08 mm.

[0008] Preferably, the thickness of the XLPE insulation layer is 0.5 mm to 1.8 mm.

[0009] Preferably, the PVC coating layer is a multi-layer PVC resin tape spirally overlapped wrapped structure with a thickness of not less than 0.2 mm.

[0010] Preferably, the copper-plastic composite longitudinally wrapped shielding layer is a copper-plastic composite tape longitudinally overlapped wrapped structure with a thickness of 15 μm to 60 μm, and the copper-plastic composite tape is a copper foil layer and a PET film base layer bonded together.

[0011] Preferably, the copper foil layer has a thickness of 3 μm to 20 μm, and the PET film base layer has a thickness of 10 μm to 45 μm.

[0012] Preferably, the thickness of the ETFE gap-wrapped friction-reducing layer is 6 μm to 10 μm.

[0013] Preferably, the polyurethane elastomer core tube comprises an inner cylindrical body and an outer cylindrical body, and a plurality of connecting plates are evenly distributed radially between the inner cylindrical body and the outer cylindrical body.

[0014] Preferably, the ferrite film wrapping layer is a ferrite film multi-layer overlapping wrapping structure with a thickness of 100 μm to 300 μm.

[0015] Beneficial effects of the utility model:

[0016] 1. Adding a polyurethane elastomer core tube inside the cable core helps to improve the flexibility and mechanical strength of the cable core. The polyurethane elastomer has good physical and mechanical properties and high elasticity. It can reduce the load on each coaxial core and has better bending resistance, ensuring that the cable core cross-sectional structure is more balanced and stable. Each coaxial core is subjected to balanced force and is wrapped with a ferrite film wrapping layer. The ferrite film wrapping layer and the PVC extruded outer sheath can be bonded into one through an adhesive layer. When bent, the PVC extruded outer sheath and the ferrite film wrapping layer maintain the same degree of bending and fit closely, effectively suppressing the occurrence of core crosstalk inside the cable core, ensuring stable electrical characteristics, and better durability.

[0017] 2. The double-layer shielding structure is formed by the copper-plastic composite longitudinal shielding and the tinned copper wire braided shielding. The longitudinal shielding structure of the copper-plastic composite tape has better bending resistance. The friction reduction effect is provided by adding the ETFE gap-wrapped anti-friction layer to alleviate the stress concentration of the copper foil. The sheet-shaped grounding copper foil replaces the original copper wire grounding wire, and the thickness is reduced to 10μm to 60μm. It fits tightly with the PVC coating layer, is not easy to produce gaps, and is beneficial to the miniaturized structural design.

[0018] 3. By adding a ferrite film wrapping layer outside the cable core, the multi-layer ferrite film wrapping structure helps to reduce the attenuation of high-frequency signal transmission, enhance the anti-attenuation performance, improve the stability of the shielding effect, and improve the durability of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0020] Figure 1 It is a schematic diagram of the cross-sectional structure of an embodiment of the present application.

[0021] Figure numerals: 1-polyurethane elastomer core tube, 2-AFRP reinforced core material, 3-coaxial core, 4-ferrite film winding layer, 5-PVC extruded outer sheath, 6-center conductor, 7-XLPE insulation layer, 8-copper plastic composite longitudinal shielding layer, 9-ETFE gap winding anti-friction layer, 10-tinned copper wire braided shielding layer, 11-sheet grounding copper foil, 12-PVC covering layer. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of 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.

[0023] like Figure 1 As shown, the bending-resistant grounded copper foil 8-core coaxial cable of the embodiment of the utility model comprises a polyurethane elastomer core tube 1, wherein the polyurethane elastomer core tube 1 is sleeved with an AFRP reinforced core material 2. Specifically, the polyurethane elastomer core tube 1 comprises an inner cylinder and an outer cylinder, and a plurality of connecting plates are evenly distributed radially between the inner cylinder and the outer cylinder.

[0024] Eight coaxial cores 3 are twisted around the outside of the polyurethane elastomer core tube 1 to form a cable core. The coaxial core 3 includes a central conductor 6, an XLPE insulation layer 7, a copper-plastic composite longitudinal shielding layer 8, an ETFE intermittently wrapped friction reduction layer 9, a tinned copper wire braided shielding layer 10 and a PVC sheathing layer 12, and a sheet-shaped grounding copper foil 11 is provided between the tinned copper wire braided shielding layer 10 and the PVC sheathing layer 12. The diameter of the central conductor 6 is 0.3mm to 1mm. Specifically, the central conductor 6 is formed by concentrically twisting a number of tinned copper monofilaments with a wire diameter of 0.01mm to 0.05mm. The thickness of the XLPE insulation layer 7 is 0.5mm to 1.8mm. In one embodiment, the copper-plastic composite longitudinal shielding layer 8 is a copper-plastic composite tape longitudinally overlapped and wrapped structure with a thickness of 15μm to 60μm, and the copper-plastic composite tape is a copper foil layer and a PET film base bonded together. Further, the copper foil layer has a thickness of 3μm to 20μm, and the PET film base has a thickness of 10μm to 45μm. The thickness of the ETFE gap-wrapped anti-friction layer 9 is 6μm to 10μm. In one embodiment, the tinned copper wire braided shielding layer 10 is a braided structure of several tinned copper wires that are mutually reversely spirally wound, and the wire diameter of the tinned copper wire is 0.05mm to 0.08mm. The thickness of the sheet-shaped grounding copper foil 11 is 10μm to 60μm, and the width of the sheet-shaped grounding copper foil 11 is 1mm to 3mm. In one embodiment, the PVC coating layer 12 is a multi-layer PVC resin tape spirally overlapped and wrapped structure with a thickness of not less than 0.2mm.

[0025] The cable core is coated with a ferrite film wrapping layer 4 and a PVC extruded outer sheath 5 in sequence. Furthermore, the ferrite film wrapping layer 4 is a ferrite film multi-layer overlapping wrapping structure with a thickness of 100 μm to 300 μm.

[0026] The above are only specific implementations of the present application, but the protection scope of the application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. Anti-bending grounded copper foil 8-core coaxial cable, its characteristics are: The invention comprises a polyurethane elastomer core tube (1), wherein the polyurethane elastomer core tube (1) is provided with an AFRP reinforcing core material (2) in the inner sleeve, and eight coaxial cores (3) are twisted around the outside of the polyurethane elastomer core tube (1) to form a cable core, wherein the outside of the cable core is sequentially coated with a ferrite film wrapping layer (4) and a PVC extruded outer sheath (5), wherein the coaxial core (3) comprises a central conductor (6), an XLPE insulating layer (7), a copper-plastic composite longitudinally wrapped shielding layer (8), an ETFE intermittently wrapped friction reducing layer (9), a tinned copper wire braided shielding layer (10) and a PVC sheathing layer (12), wherein a sheet-shaped grounding copper foil (11) is provided between the tinned copper wire braided shielding layer (10) and the PVC sheathing layer (12), wherein the diameter of the central conductor (6) is 0.3 mm to 1 mm, the thickness of the sheet-shaped grounding copper foil (11) is 10 μm to 60 μm, and the width of the sheet-shaped grounding copper foil (11) is 1 mm to 3 mm.

2. The 8-core coaxial cable with anti-bending grounding copper foil according to claim 1 is characterized in that: The central conductor (6) is formed by concentrically twisting a number of tinned copper monofilaments with a wire diameter of 0.01 mm to 0.05 mm.

3. The 8-core coaxial cable with anti-bending grounding copper foil according to claim 1 is characterized in that: The tinned copper wire braided shielding layer (10) is a braided structure in which a plurality of tinned copper wires are mutually spirally wound in opposite directions, and the wire diameter of the tinned copper wires is 0.05 mm to 0.08 mm.

4. The 8-core coaxial cable with anti-bending grounding copper foil according to claim 1 is characterized in that: The thickness of the XLPE insulation layer (7) is 0.5 mm to 1.8 mm.

5. The 8-core coaxial cable with anti-bending grounding copper foil according to claim 1 is characterized in that: The PVC coating layer (12) is a multi-layer PVC resin tape spirally overlapped wrapped structure with a thickness of not less than 0.2 mm.

6. The 8-core coaxial cable with anti-bending grounding copper foil according to claim 1 is characterized in that: The copper-plastic composite longitudinally wrapped shielding layer (8) is a copper-plastic composite tape longitudinally overlapped and wrapped structure with a thickness of 15 μm to 60 μm. The copper-plastic composite tape is a copper foil layer and a PET film base layer bonded together.

7. The 8-core coaxial cable with anti-bending grounding copper foil according to claim 6 is characterized in that: The copper foil layer has a thickness of 3 μm to 20 μm, and the PET film base layer has a thickness of 10 μm to 45 μm.

8. The 8-core coaxial cable with anti-bending grounding copper foil according to claim 1 is characterized in that: The thickness of the ETFE gap-wrapped anti-friction layer (9) is 6 μm to 10 μm.

9. The 8-core coaxial cable with anti-bending grounding copper foil according to claim 1 is characterized in that: The polyurethane elastomer core tube (1) comprises an inner cylindrical body and an outer cylindrical body, and a plurality of connecting plates are evenly distributed radially between the inner cylindrical body and the outer cylindrical body.

10. The 8-core coaxial cable with anti-bending grounding copper foil according to claim 1 is characterized in that: The ferrite film wrapping layer (4) is a ferrite film multi-layer overlapping wrapping structure and has a thickness of 100 μm to 300 μm.

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