Bending-resistant small-diameter coaxial video cable

Abstract

The utility model discloses an anti-bending small-diameter coaxial video cable, which comprises a tinned copper monofilament conductor, a copper net conductor layer is formed on the outer surface of the tinned copper monofilament conductor by weaving and pressing a plurality of tinned copper wires, and the wire diameter of the tinned copper wires is 0.02-0.04 mm and is smaller than the diameter of the tinned copper monofilament conductor. A para-position type wholly aromatic copolyamide stretched fiber plain weaving net, an XLPE insulating layer, a silver-plated copper wire winding shielding layer and an irradiation crosslinking high-density polyethylene sheath layer are sequentially wrapped outside the copper net conductor layer, the silver-plated copper wire winding shielding layer is of a structure that a plurality of shielding wires are spirally wound side by side, and each shielding wire is composed of a silver-plated copper wire conductor and an ETFE resin wrapping layer. The video cable is better in bending resistance, is resistant to fatigue and damage in a long-time bending state, is not liable to break wires and wires, guarantees the high-definition video transmission quality, and is better in durability and applicability.

Description

Technical Field

[0001] The present application relates to the field of cable technology, and in particular to a bending-resistant thin-diameter coaxial video cable. Background Art

[0002] Among the mainstream high-definition video interfaces in electronic display devices, the SDI and HDMI interfaces have the highest popularity and the best performance, especially in high-definition video transmitters, high-definition camera equipment and high-definition display equipment. The SDI interface is the abbreviation of "Serial Digital Interface", which means serial digital interface in Chinese. The technical principle of the SDI interface is to use a single channel to transmit each bit and corresponding data between data. The SDI interface is a professional video signal transmission interface type, which is often used for broadcast-level video equipment connection. It uses ordinary 75-ohm coaxial line transmission and is used in banks, hospitals, schools, highways, smart buildings, etc. It is suitable for on-site monitoring and fast control and playback. This type of coaxial video generally has a maximum outer diameter of 6 or 7 mm, and the conductor is thin and mostly copper wire twisted or copper monofilament. It has poor flexibility and bending resistance, and is easy to break, affecting the normal high-definition video transmission quality and is not durable. Utility Model Content

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the present application is to provide a bending-resistant thin-diameter coaxial video cable with better bending resistance, resistance to fatigue damage under long-term bending, and not easy to break the wires, thereby ensuring the quality of high-definition video transmission and having better durability and applicability.

[0004] This application solves the above technical problems through the following technical solutions.

[0005] The bending-resistant thin-diameter coaxial video cable comprises a tinned copper monofilament conductor, on the outer surface of which a copper mesh conductor layer is formed by weaving and pressing a plurality of tinned copper wires, the wire diameter of the tinned copper wire is 0.02 mm to 0.04 mm and is smaller than the diameter of the tinned copper monofilament conductor, the outside of the copper mesh conductor layer is sequentially coated with a para-type wholly aromatic copolyamide stretched fiber plain woven mesh, an XLPE insulation layer, a silver-plated copper wire winding shielding layer and an irradiated cross-linked high-density polyethylene sheathing layer, the silver-plated copper wire winding shielding layer is a structure of a plurality of shielded wires spirally wound side by side, and the shielded wire is composed of a silver-plated copper wire conductor and an ETFE resin coating layer.

[0006] Preferably, the para-type wholly aromatic copolyamide stretched fiber plain woven web is an inner and outer double-layer para-type wholly aromatic copolyamide stretched fiber twisted wire plain woven web structure.

[0007] Preferably, the inner layer of the para-type wholly aromatic copolyamide stretched fiber strands plain woven mesh is a plain woven mesh structure woven from fine para-type wholly aromatic copolyamide stretched fiber strands, and the outer layer of the para-type wholly aromatic copolyamide stretched fiber strands plain woven mesh is a plain woven mesh structure woven from coarse para-type wholly aromatic copolyamide stretched fiber strands, and the diameter of the coarse para-type wholly aromatic copolyamide stretched fiber strands is 3 to 5 times the diameter of the fine para-type wholly aromatic copolyamide stretched fiber strands.

[0008] Preferably, the weaving density of the para-type wholly aromatic copolyamide stretched fiber plain weave mesh is not less than 95%.

[0009] Preferably, the copper mesh conductor layer is coated with insulating lubricating silicone grease.

[0010] Preferably, the thickness of the XLPE insulation layer is 1.2 mm to 2 mm.

[0011] Preferably, the wire diameter of the silver-plated copper wire conductor is 0.05 mm to 0.08 mm and is one-fifteenth to one-fifteenth of the outer diameter of the silver-plated copper wire wrapped shielding layer.

[0012] Preferably, the ETFE resin coating layer is an ETFE resin overlapping and wrapping structure with an overlapping rate of 20% to 30%.

[0013] Preferably, the ETFE resin coating layer has a thickness of 15 μm to 20 μm.

[0014] Preferably, the radiation cross-linked high-density polyethylene sheath layer has a thickness of 0.45 mm to 0.9 mm.

[0015] Beneficial effects of this application:

[0016] 1. The tinned copper monofilament conductor maintains both flexibility and mechanical strength. A copper mesh conductor layer is formed on the outer surface of the tinned copper monofilament conductor by weaving and pressing tinned copper wires. The tinned copper monofilament conductor and the copper mesh conductor layer are closely fitted together to form the thin-diameter inner conductor of the cable. The tinned copper wire will not become loose, which is beneficial to enhancing the bending resistance of the cable. During use, the copper mesh conductor layer is more flexible and less likely to break when kept in a bent state for a long time, ensuring stable and reliable electrical characteristics, ensuring the quality of high-definition video transmission, and having better durability and applicability.

[0017] 2. By using the silver-plated copper wire winding shielding layer to replace the original double-layer shielding structure of copper foil or aluminum foil shielding and metal wire braiding shielding, the single-layer shielding wire is spirally wound side by side. The shielding wire is composed of a silver-plated copper wire conductor and an ETFE resin coating. The silver-plated copper wire has higher conductivity and better electrical properties. There is no direct contact between the silver-plated copper wire conductors, eliminating contact current, which helps to suppress the attenuation of high-frequency signal transmission, enhance anti-interference performance, and ensure a stable shielding effect. At the same time, the ETFE resin coating layer improves the good friction reduction effect, which is beneficial to improve the bending resistance of the shielding layer, reduce the disconnection of the silver-plated copper wire conductor, and has better durability and application.

[0018] 3. By adding a para-type fully aromatic copolyamide stretched fiber plain woven mesh between the copper mesh conductor layer and the XLPE insulation layer, it helps prevent the insulation layer from penetrating into the tinned copper wires of the copper mesh conductor layer and causing adhesion, enhances the flexibility and bending resistance of the conductor, reduces the occurrence of wire breakage, and at the same time effectively protects the insulation layer and improves durability and applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the cross-sectional structure of an embodiment of the present application.

[0020] Description of reference numerals:

[0021] 1- tinned copper monofilament conductor, 2- copper mesh conductor layer, 3- para-type fully aromatic copolyamide stretched fiber plain woven mesh, 4- XLPE insulation layer, 5- silver-plated copper wire winding shielding layer, 6- irradiated cross-linked high-density polyethylene sheath layer. DETAILED DESCRIPTION

[0022] The terms used in the implementation method part of this application are only used to explain the specific embodiments of this application, and are not intended to limit this application. The implementation method of the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0023] See also Figure 1 The bending-resistant thin-diameter coaxial video cable of the embodiment of the present application includes a tinned copper monofilament conductor 1, on the outer surface of the tinned copper monofilament conductor 1, a copper mesh conductor layer 2 is formed by weaving and pressing a plurality of tinned copper wires, and the copper mesh conductor layer 2 is coated with insulating lubricating silicone grease. The diameter of the tinned copper wire is 0.02mm to 0.04mm and is smaller than the diameter of the tinned copper monofilament conductor 1.

[0024] The copper mesh conductor layer 2 is coated with a para-type wholly aromatic copolyamide stretched fiber plain woven mesh 3, an XLPE insulation layer 4, a silver-plated copper wire winding shielding layer 5 and an irradiated cross-linked high-density polyethylene sheath layer 6 in sequence. Specifically, the para-type wholly aromatic copolyamide stretched fiber plain woven mesh 3 is an inner and outer double-layer para-type wholly aromatic copolyamide stretched fiber stranded wire plain woven mesh structure, further, the inner layer of the para-type wholly aromatic copolyamide stretched fiber stranded wire plain woven mesh is a flat woven mesh structure woven by weaving fine para-type wholly aromatic copolyamide stretched fiber stranded wires, and the outer layer of the para-type wholly aromatic copolyamide stretched fiber stranded wire plain woven mesh is a flat woven mesh structure woven by weaving coarse para-type wholly aromatic copolyamide stretched fiber stranded wires, the diameter of the coarse para-type wholly aromatic copolyamide stretched fiber stranded wire is 3 to 5 times the diameter of the fine para-type wholly aromatic copolyamide stretched fiber stranded wire, and the weaving density of the para-type wholly aromatic copolyamide stretched fiber plain woven mesh 3 is not less than 95%. The thickness of the XLPE insulation layer 4 is 1.2mm to 2mm. The silver-plated copper wire winding shielding layer 5 is a structure of several shielded wires spirally wound side by side. The shielded wire is composed of a silver-plated copper wire conductor and an ETFE resin coating layer. Furthermore, the wire diameter of the silver-plated copper wire conductor is 0.05mm to 0.08mm and is one-fifteenth to one-fifteenth of the outer diameter of the silver-plated copper wire winding shielding layer 5. The ETFE resin coating layer is an ETFE resin overlapping wrapping structure with an overlapping rate of 20% to 30%. The thickness of the ETFE resin coating layer is 15μm to 20μm. The thickness of the irradiated cross-linked high-density polyethylene sheath layer 6 is 0.45mm to 0.9mm.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the embodiments of the present application have been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. Anti-bending thin-diameter coaxial video cable, characterized by: Including tin plating A copper monofilament conductor (1), wherein a copper mesh conductor layer (2) is formed by weaving and pressing a plurality of tinned copper wires on the outer surface of the tinned copper monofilament conductor (1), wherein the diameter of the tinned copper wires is 0.02 mm to 0.04 mm and is smaller than the diameter of the tinned copper monofilament conductor (1), and the copper mesh conductor layer (2) is coated with a para-type wholly aromatic copolyamide stretched fiber plain woven mesh (3), an XLPE insulation layer (4), a silver-plated copper wire winding shielding layer (5) and an irradiated cross-linked high-density polyethylene sheath layer (6) in sequence on the outside, wherein the silver-plated copper wire winding shielding layer (5) is a structure of a plurality of shielded wires spirally wound side by side, and the shielded wire is composed of a silver-plated copper wire conductor and an ETFE resin coating layer.

2. The bend-resistant thin coaxial video cable according to claim 1, characterized in that: The para-type wholly aromatic copolyamide stretched fiber plain woven net (3) is an inner and outer double-layer para-type wholly aromatic copolyamide stretched fiber twisted wire plain woven net structure.

3. The bend-resistant thin coaxial video cable according to claim 2, characterized in that: The inner layer of the para-type wholly aromatic copolyamide stretched fiber strands plain woven mesh is a flat woven mesh structure woven from fine para-type wholly aromatic copolyamide stretched fiber strands, and the outer layer of the para-type wholly aromatic copolyamide stretched fiber strands plain woven mesh is a flat woven mesh structure woven from coarse para-type wholly aromatic copolyamide stretched fiber strands, and the diameter of the coarse para-type wholly aromatic copolyamide stretched fiber strands is 3 to 5 times the diameter of the fine para-type wholly aromatic copolyamide stretched fiber strands.

4. The bend-resistant thin coaxial video cable according to claim 2, characterized in that: The weaving density of the para-type wholly aromatic copolyamide stretched fiber plain weave (3) is not less than 95%.

5. The bend-resistant thin coaxial video cable according to claim 1, characterized in that: The copper mesh conductor layer (2) is coated with insulating lubricating silicone grease.

6. The bend-resistant thin coaxial video cable according to claim 1, characterized in that: The thickness of the XLPE insulation layer (4) is 1.2 mm to 2 mm.

7. The bend-resistant thin coaxial video cable according to claim 1, characterized in that: The wire diameter of the silver-plated copper wire conductor is 0.05 mm to 0.08 mm and is one fifth to one fifteenth of the outer diameter of the silver-plated copper wire wound shielding layer (5).

8. The bend-resistant thin coaxial video cable according to claim 1, characterized in that: The ETFE resin coating layer is an ETFE resin overlapping and wrapping structure with an overlapping rate of 20% to 30%.

9. The bend-resistant thin coaxial video cable according to claim 1, characterized in that: The thickness of the ETFE resin coating layer is 15 μm to 20 μm.

10. The bend-resistant thin coaxial video cable according to claim 1, characterized in that: The thickness of the radiation cross-linked high-density polyethylene sheath layer (6) is 0.45 mm to 0.9 mm.

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