Non-grounding vibration reduction type flame-retardant armored data cable

Abstract

The utility model discloses a non-grounded vibration-damping flame-retardant armored data cable, which comprises four twisted-pair wire cores, wherein the four twisted-pair wire cores are arranged at intervals through a cross-shaped isolation core frame and are twisted together to form a cable core; a hollow vibration reduction polyurethane elastomer insulating layer, a copper-plastic composite wrapping shielding layer, a low-smoke halogen-free polyolefin inner sheath layer, a copper net weaving armor layer and a low-smoke halogen-free polyolefin outer sheath layer are sequentially wrapped outside the cable core, the copper-plastic composite wrapping shielding layer is of a copper-plastic composite belt spiral covering wrapping structure, and the covering rate is 20%-50%; the copper-plastic composite belt is formed by compounding a PET film surface layer, copper foil, a copper-zinc alloy electroplated layer and a PET film bottom layer, the cable core of the data cable is round in structure, high in mechanical strength and good in vibration reduction performance, loads borne by twisted pairs are relieved, wire breakage and core breakage are prevented, the shielding layer does not need to be grounded, signal crosstalk is effectively restrained, and stable shielding performance is guaranteed; and the durability is better.

Description

Technical Field

[0001] The present application relates to the field of cable technology, and in particular to a non-grounded vibration-damping flame-retardant armored data cable. Background Art

[0002] Category 6 twisted pair is a Gigabit Ethernet and other network protocols, suitable for basic voice and data facilities up to 100MHz. The cabling method of four pairs of twisted pair cables is to separate them into cables with a cross skeleton and then wrap them with a copper-plastic shielding layer. The balanced stability of such a cable core structure is relatively general, and the mechanical strength is relatively weak. When subjected to vibration and slight impact, the vibration reduction performance is insufficient. Bending and extrusion can easily cause deformation of the cable core structure. The twisted pair is prone to wire and core breakage, and the replacement frequency is high. In addition, the copper-plastic shielding layer needs to be grounded, and the grounding operation is complicated and costly. If the grounding treatment is not adopted, the copper foil surface will be charged, which is easy to cause signal crosstalk, and the shielding performance stability is poor, affecting normal operation. 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 non-grounded vibration-damping flame-retardant armored data cable with a rounded cable core structure, high mechanical strength, and good vibration-damping performance. It can reduce the load on each twisted pair and prevent wire and core breakage. The shielding layer does not need to be grounded, effectively suppressing signal crosstalk, ensuring stable shielding performance, and better durability.

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

[0005] A non-grounded vibration-damping flame-retardant armored data cable comprises four twisted pairs of cores which are arranged separately by a cross-shaped isolation core frame and twisted together to form a cable core. The outside of the cable core is sequentially coated with a hollow vibration-damping polyurethane elastomer insulation layer, a copper-plastic composite wrapped shielding layer, a low-smoke halogen-free polyolefin inner sheath layer, a copper mesh braided armor layer and a low-smoke halogen-free polyolefin outer sheath layer. The copper-plastic composite wrapped shielding layer is a copper-plastic composite tape spirally overlapped wrapped structure with an overlap rate of 20% to 50%. The copper-plastic composite tape is formed by a PET film surface layer, a copper foil, a copper-zinc alloy electroplating layer and a PET film bottom layer. The twisted pair core comprises two insulated cores twisted together, and the insulated core comprises a solid copper conductor and an XLPE insulation layer. The outer diameter of the solid copper conductor does not exceed 0.6 mm, and the thickness of the XLPE insulation layer is 0.15 mm to 0.3 mm.

[0006] Preferably, the thickness of the PET film surface layer and the PET film bottom layer are both 25μm to 120μm, the thickness of the copper foil layer is 8μm to 50μm, the thickness of the copper-zinc alloy electroplated layer does not exceed 2μm, and the copper-zinc alloy electroplated layer is formed by electroplating the outer surface of the copper foil.

[0007] Preferably, the copper-plastic composite belt has a width of 15 mm to 60 mm.

[0008] Preferably, the outer diameter of the solid copper conductor is 0.56 mm, 0.57 mm or 0.58 mm.

[0009] Preferably, the XLPE insulation layer has a thickness of 0.2 mm.

[0010] Preferably, the hollow vibration-damping polyurethane elastomer insulation layer 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.

[0011] Preferably, the low-smoke halogen-free polyolefin inner sheath layer has a thickness of 0.45 mm to 0.8 mm.

[0012] Preferably, the low-smoke halogen-free polyolefin outer sheath layer has a thickness of 1 mm.

[0013] Preferably, the lay lengths of the four twisted wire cores are 10 mm to 28 mm and are different from each other.

[0014] Beneficial effects of this application:

[0015] 1. The four twisted cores are separated and arranged by a cross-shaped isolation core frame to keep the cable core structure balanced, and the hollow vibration-damping polyurethane elastomer insulation layer is coated on the outside of the cable core to keep the cable core structure round and high mechanical strength. The hollow vibration-damping polyurethane elastomer has good physical and mechanical properties and high elasticity, so that the cable has good vibration reduction performance. Under slight impact and vibration conditions, it can reduce the oscillation load borne by each twisted core, prevent wire breakage, ensure stable electrical characteristics, and better durability.

[0016] 2. By improving the shielding layer structure of copper-plastic composite tape, the copper-plastic composite tape is composed of PET film surface layer, copper foil, copper-zinc alloy electroplating layer and PET film bottom layer. The grounding wire is removed, and the PET film surface layer is added on both sides of the copper foil to improve the flexibility of the shielding layer, reduce stress concentration, and prevent the copper foil from cracking and failure. The overlap rate of the copper-plastic composite tape is 20% to 50%. After the shielding layer is wrapped, there is no need for grounding treatment, which can effectively prevent the copper foil surface from being charged, ensure stable shielding performance, and help reduce complex operation costs and process difficulties. At the same time, adding a copper-zinc alloy electroplating layer on the outer surface of the copper foil has sufficient corrosion resistance, which is beneficial to protecting the copper foil layer, inhibiting the oxidation of the copper foil, eliminating the deterioration such as discoloration caused by oxidation, and ensuring the stability of electrical characteristics and better durability.

[0017] 3. Additional mechanical protection is provided by adding a copper mesh braided armor layer, while taking into account the flexibility of the cable and improving durability and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following drawings are intended to facilitate the description of preferred embodiments and are not intended to limit the scope of protection of the present application.

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

[0020] In the figure: 1-twisted pair core, 2-cross-shaped isolation core frame, 3-hollow vibration-damping polyurethane elastomer insulation layer, 4-copper-plastic composite wrapped shielding layer, 5-low-smoke halogen-free polyolefin inner sheath layer, 6-copper mesh braided armor layer, 7-low-smoke halogen-free polyolefin outer sheath layer, 8-insulated core, 9-solid copper conductor, 10-XLPE insulation layer. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0022] like Figure 1 As shown, the non-grounded vibration-damping flame-retardant armored data cable of the embodiment of the present application includes four twisted cores 1 that are separated and arranged by a cross-shaped isolation core frame 2 and twisted together to form a cable core. Furthermore, the twist pitch of the four twisted cores 1 is 10 mm to 28 mm and is different from each other. The twisted core 1 includes two insulated cores 8 twisted together, and the insulated core 8 includes a solid copper conductor 9 and an XLPE insulation layer 10. The outer diameter of the solid copper conductor 9 does not exceed 0.6 mm. Furthermore, the outer diameter of the solid copper conductor 9 is 0.56 mm, 0.57 mm or 0.58 mm. The thickness of the XLPE insulation layer 10 is 0.15 mm to 0.3 mm. For example, the thickness of the XLPE insulation layer 10 is 0.2 mm.

[0023] The cable core is coated with a hollow vibration-damping polyurethane elastomer insulation layer 3, a copper-plastic composite wrapped shielding layer 4, a low-smoke halogen-free polyolefin inner sheath layer 5, a copper mesh braided armor layer 6 and a low-smoke halogen-free polyolefin outer sheath layer 7 in sequence. Further, the hollow vibration-damping polyurethane elastomer insulation layer 3 includes 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. The copper-plastic composite wrapped shielding layer 4 is a copper-plastic composite tape spirally overlapped wrapped structure with an overlap rate of 20% to 50%. Further, the copper-plastic composite tape has a width of 15mm to 60mm. The copper-plastic composite tape is formed by a composite of a PET film surface layer, a copper foil, a copper-zinc alloy electroplated layer and a PET film bottom layer. Specifically, the thickness of the PET film surface layer and the PET film bottom layer is 25 μm to 120 μm, the thickness of the copper foil layer is 8 μm to 50 μm, the thickness of the copper-zinc alloy electroplated layer does not exceed 2 μm, and the copper foil outer surface is electroplated to form the copper-zinc alloy electroplated layer. The thickness of the low-smoke halogen-free polyolefin inner sheath layer 5 is 0.45 mm to 0.8 mm. The thickness of the low-smoke halogen-free polyolefin outer sheath layer 7 is 1 mm.

[0024] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. Non-grounded vibration-damping flame-retardant armored data cable, characterized by: The invention comprises four twisted wire cores (1) which are arranged separately by a cross-shaped isolation core frame (2) and twisted together to form a cable core. The cable core is coated with a hollow vibration-damping polyurethane elastomer insulation layer (3), a copper-plastic composite wrapped shielding layer (4), a low-smoke halogen-free polyolefin inner sheath layer (5), a copper mesh braided armor layer (6) and a low-smoke halogen-free polyolefin outer sheath layer (7) in sequence. The copper-plastic composite wrapped shielding layer (4) is a copper-plastic composite tape spirally overlapped wrapped structure with an overlap rate of 20% to 50%. The copper-plastic composite tape is formed by a PET film surface layer, a copper foil, a copper-zinc alloy electroplating layer and a PET film bottom layer. The twisted wire core (1) comprises two insulated wire cores (8) twisted together. The insulated wire core (8) comprises a solid copper conductor (9) and an XLPE insulation layer (10). The solid copper conductor (9) has an outer diameter of no more than 0.6 mm, and the XLPE insulation layer (10) has a thickness of 0.15 mm to 0.3 mm.

2. The non-grounded vibration-damping flame-retardant armored data cable according to claim 1 is characterized in that: PET The thickness of the film surface layer and the PET film bottom layer are both 25μm to 120μm, the thickness of the copper foil layer is 8μm to 50μm, the thickness of the copper-zinc alloy electroplating layer does not exceed 2μm, and the copper-zinc alloy electroplating layer is formed by electroplating the outer surface of the copper foil.

3. The non-grounded vibration-damping flame-retardant armored data cable according to claim 1 is characterized by: The copper-plastic composite belt has a width of 15 mm to 60 mm.

4. The non-grounded vibration-damping flame-retardant armored data cable according to claim 1 is characterized by: The solid copper conductor (9) has an outer diameter of 0.56 mm, 0.57 mm or 0.58 mm.

5. The non-grounded vibration-damping flame-retardant armored data cable according to claim 1 is characterized by: The XLPE insulation layer (10) has a thickness of 0.2 mm.

6. The non-grounded vibration-damping flame-retardant armored data cable according to claim 1 is characterized by: The hollow vibration-damping polyurethane elastomer insulating layer (3) comprises an inner cylindrical body and an outer cylindrical body, and a plurality of connecting plates are evenly distributed in a radial pattern between the inner cylindrical body and the outer cylindrical body.

7. The non-grounded vibration-damping flame-retardant armored data cable according to claim 1 is characterized by: The low-smoke halogen-free polyolefin inner sheath layer (5) has a thickness of 0.45 mm to 0.8 mm.

8. The non-grounded vibration-damping flame-retardant armored data cable according to claim 1 is characterized by: The low-smoke halogen-free polyolefin outer sheath layer (7) has a thickness of 1 mm.

9. The non-grounded vibration-damping flame-retardant armored data cable according to claim 1 is characterized by: The lay lengths of the four twisted wire cores (1) are 10 mm to 28 mm and are different from each other.

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