Shock-resistant anti-core-stringing main signal cable

Abstract

The utility model discloses an anti-impact anti-core-string main signal cable, which comprises two four-wire groups which are arranged side by side at an interval and are jointly wrapped in a TPU elastomer inner sheath, and the TPU elastomer inner sheath forms a connecting rib on an interval section between the two four-wire groups. The TPU elastomer inner sheath is sequentially coated with a polyester fiber plain woven fabric wrapping layer, a corrugated copper strip shielding layer, a heat-conducting silicone grease layer, an irradiation crosslinking linear low-density polyethylene middle sheath, a double-steel-strip armor layer and an irradiation crosslinking linear low-density polyethylene outer sheath; the four-wire group comprises a wire core body formed by twisting four insulating wires; the outside of the wire core body is coated with a PTFE semi-directional belt wrapping antifriction layer. The main signal cable has the advantages of high mechanical strength, good slight impact resistance, long service life and better durability, and the cable core structure is not easy to deform after being impacted, and core channeling is prevented.

Description

Technical Field

[0001] The present application relates to the field of cable technology, and in particular to an impact-resistant and anti-core crosstalk main signal cable. Background Art

[0002] Rail transit construction is large-scale, involving multiple industries such as construction, metallurgy, electrical, electromechanical equipment, and wires and cables. Wire and cable manufacturing is one of the largest supporting industries and is closely related to the development of urban rail transit. There are many varieties of wires and cables used in urban rail transit. For example, power cables are mainly DC traction cables, flame-retardant cables, fire-resistant cables, green environmental protection cables, etc. Signal cables are mainly subway signal cables, control cables, communication cables, and communication optical cables, etc., such as the connection between the traffic control center and the equipment room along the track. Laying and installation in complex and changeable tunnels requires the ability to withstand slight impact forces. General signal cables have low mechanical strength and are prone to deformation of the cable core structure when subjected to slight impact forces, resulting in core stringing, core breakage, and wire breakage, resulting in unstable electrical characteristics, poor durability, and safety hazards. Utility Model Content

[0003] The present application aims to solve the technical problem of providing an impact-resistant and anti-core cross-linking main signal cable in view of the deficiencies in the prior art. The cable has high mechanical strength, good resistance to slight impacts, and its core structure is not easily deformed and core cross-linking is prevented when subjected to impact. The cable has a long service life and better durability.

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

[0005] The impact-resistant and anti-cross-core main signal cable comprises two quad-wire groups arranged side by side and coated together in a TPU elastomer inner sheath, wherein the TPU elastomer inner sheath is provided with connecting ribs on the interval section between the two quad-wire groups, and the outside of the TPU elastomer inner sheath is sequentially coated with a polyester fiber plain woven cloth wrapping layer, a corrugated copper tape shielding layer, a thermal conductive silicone grease layer, a radiation cross-linked linear low-density polyethylene middle sheath, a double steel tape armor layer and a radiation cross-linked linear low-density polyethylene outer sheath, wherein the quad-wire group comprises four insulated wires twisted together to form a wire core, and the outside of the wire core is coated with a PTFE semi-directional tape wrapping friction reduction layer.

[0006] Preferably, the insulated wire comprises a solid annealed copper conductor and a polyethylene extruded insulation layer.

[0007] Preferably, the solid annealed copper conductor has a diameter of 1.12 mm to 1.14 mm.

[0008] Preferably, the PTFE semi-directional tape wrapped anti-friction layer is a PTFE semi-directional tape multi-layer overlapping wrapped structure, and the PTFE semi-directional tape overlapping rate is one quarter to one third of the PTFE semi-directional tape width.

[0009] Preferably, the double steel belt armor layer is a spirally wound structure of two layers of 0.5 mm thick steel belts.

[0010] Preferably, the surface of the double steel belt armor layer is coated with insulating lubricating silicone grease.

[0011] Preferably, the thickness of the thermal grease layer is 10 μm to 50 μm.

[0012] Preferably, the thickness of the inner sheath of the TPU elastomer is 0.6 mm to 1 mm.

[0013] Preferably, the radiation cross-linked linear low-density polyethylene middle sheath has a thickness of 0.8 mm to 1 mm.

[0014] Preferably, the radiation cross-linked linear low-density polyethylene outer sheath has a thickness of 1.2 mm to 1.6 mm.

[0015] Beneficial effects of this application:

[0016] 1. By arranging two four-wire groups side by side and covering them in a TPU elastomer inner sheath, the TPU elastomer has good physical and mechanical properties and high elasticity. The four-wire groups are kept at intervals by connecting ribs to prevent core stringing, which is beneficial to enhancing mechanical strength and improving resistance to slight impact. It is not easy to deform the structure when subjected to slight impact, which helps to prevent core and wire breakage, ensure stable electrical characteristics of the cable, and better durability.

[0017] 2. Good mechanical protection is provided by adding a double steel belt armor layer. The thickness of the steel belt is 0.5mm and the surface is coated with insulating lubricating silicone grease, which takes into account the flexibility and mechanical strength of the cable, protects the irradiated cross-linked linear low-density polyethylene middle sheath and outer sheath, and improves durability and applicability.

[0018] 3. The sliding property of the anti-friction layer wrapped with PTFE semi-directional tape is beneficial to improving the anti-friction effect, reducing the load applied to the four-wire group, preventing direct contact and friction between the insulated wire and the inner sheath, reducing stress concentration, preventing core and wire breakage, ensuring stable electrical characteristics, and improving durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

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

[0021] In the figure: 1-quadruple wire group, 2-TPU elastomer inner sheath, 3-connecting ribs, 4-polyester fiber plain woven fabric inner cushion layer, 5-corrugated copper tape shielding layer, 6-thermal conductive silicone grease layer, 7-irradiation cross-linked linear low-density polyethylene middle sheath, 8-double steel tape armor layer, 9-irradiation cross-linked linear low-density polyethylene outer sheath, 10-PTFE semi-directional tape wrapped anti-friction layer, 11-solid annealed copper conductor, 12-polyethylene extruded insulation layer. DETAILED DESCRIPTION

[0022] 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.

[0023] like Figure 1 The impact-resistant and anti-core crosstalk main signal cable of the embodiment of the present application includes two quad-wire groups 1 arranged side by side and coated together in a TPU elastomer inner sheath 2. The TPU elastomer inner sheath 2 is provided with a connecting rib 3 on the interval section between the two quad-wire groups 1. Furthermore, the thickness of the TPU elastomer inner sheath 2 is 0.6 mm to 1 mm. The quad-wire group 1 includes four insulated wires twisted together to form a wire core. In one embodiment, the insulated wire includes a solid annealed copper conductor 11 and a polyethylene extruded insulation layer 12. Specifically, the diameter of the solid annealed copper conductor 11 is 1.12 mm to 1.14 mm. The outside of the wire core is coated with a PTFE semi-directional tape wrapped anti-friction layer 10. Furthermore, the PTFE semi-directional tape wrapped anti-friction layer 10 is a PTFE semi-directional tape multi-layer overlapping wrapped structure, and the PTFE semi-directional tape overlap rate is one-quarter to one-third of the PTFE semi-directional tape width.

[0024] The outside of the TPU elastomer inner sheath 2 is sequentially coated with a polyester fiber plain woven fabric inner cushion layer 4, a corrugated copper tape shielding layer 5, a thermal conductive silicone grease layer 6, an irradiated cross-linked linear low-density polyethylene middle sheath 7, a double steel tape armor layer 8 and an irradiated cross-linked linear low-density polyethylene outer sheath 9. Furthermore, the surface of the double steel tape armor layer 8 is coated with insulating lubricating silicone grease. In one embodiment, the double steel tape armor layer 8 is a two-layer 0.5mm thick steel tape spirally wound structure. The thickness of the thermal conductive silicone grease layer 6 is 10μm to 50μm. The thickness of the irradiated cross-linked linear low-density polyethylene middle sheath 7 is 0.8mm to 1mm. The thickness of the irradiated cross-linked linear low-density polyethylene outer sheath 9 is 1.2mm to 1.6mm.

[0025] 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. Impact-resistant and anti-core crosstalk main signal cable, characterized by: The invention comprises two quad-wire groups (1) arranged side by side and spaced apart and are jointly coated in a TPU elastomer inner sheath (2); the TPU elastomer inner sheath (2) is provided with a connecting rib (3) on the interval section between the two quad-wire groups (1); the outside of the TPU elastomer inner sheath (2) is sequentially coated with a polyester fiber plain woven fabric inner cushion layer (4), a corrugated copper tape shielding layer (5), a thermal conductive silicone grease layer (6), a radiation cross-linked linear low-density polyethylene middle sheath (7), a double steel tape armor layer (8) and a radiation cross-linked linear low-density polyethylene outer sheath (9); the quad-wire group (1) comprises four insulated wires twisted together to form a wire core body; the outside of the wire core body is coated with a PTFE semi-directional tape wrapped friction reduction layer (10).

2. The impact-resistant and anti-core crosstalk-resistant main signal cable according to claim 1 is characterized in that: The insulated wire comprises a solid annealed copper conductor (11) and a polyethylene extruded insulation layer (12).

3. The impact-resistant and anti-core crosstalk-resistant main signal cable according to claim 2 is characterized in that: The solid annealed copper conductor (11) has a diameter of 1.12 mm to 1.14 mm.

4. The impact-resistant and anti-core crosstalk main signal cable according to claim 1 is characterized in that: The PTFE semi-directional tape wrapped anti-friction layer (10) is a PTFE semi-directional tape multi-layer overlapping wrapped structure, and the PTFE semi-directional tape overlapping rate is one quarter to one third of the PTFE semi-directional tape width.

5. The impact-resistant and anti-core crosstalk-resistant main signal cable according to claim 1 is characterized in that: The double steel belt armor layer (8) is a spirally wound structure of two layers of 0.5 mm thick steel belts.

6. The impact-resistant and anti-core crosstalk-resistant main signal cable according to claim 1 is characterized in that: The surface of the double steel belt armor layer (8) is coated with insulating lubricating silicone grease.

7. The impact-resistant and anti-core crosstalk-resistant main signal cable according to claim 1 is characterized in that: The thickness of the thermal conductive silicone grease layer (6) is 10 μm to 50 μm.

8. The impact-resistant and anti-core crosstalk-resistant main signal cable according to claim 1 is characterized in that: The thickness of the TPU elastomer inner sheath (2) is 0.6 mm to 1 mm.

9. The impact-resistant and anti-core crosstalk-resistant main signal cable according to claim 1 is characterized in that: The thickness of the radiation cross-linked linear low-density polyethylene middle layer sheath (7) is 0.8 mm to 1 mm.

10. The impact-resistant and anti-core crosstalk-resistant main signal cable according to claim 1 is characterized in that: The radiation cross-linked linear low-density polyethylene outer sheath (9) has a thickness of 1.2 mm to 1.6 mm.

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