Anti-stripping and anti-damage signal cable

Abstract

The utility model discloses an anti-peeling and anti-damage type signal cable, which comprises three signal conductors which are mutually spaced through a Y-shaped polyethylene isolation core body and are jointly stranded with an alignment type wholly aromatic copolyamide stretched fiber core material to form a cable core, and a longitudinal hole is formed in the center of the Y-shaped polyethylene isolation core body. A twisted-pair wire core is arranged in the longitudinal hole in a sleeved mode, the cable core is coated with an irradiation crosslinking linear low-density polyethylene sheath, and a tearing rope is arranged between the para-position type wholly aromatic copolyamide stretching fiber core material and the irradiation crosslinking linear low-density polyethylene sheath. The outer surface of the irradiation crosslinking linear low density polyethylene sheath is provided with an axial wire stripping groove which is matched with the tearing rope along the axial direction. According to the signal cable, manual peeling operation can be easily realized, the sheath and the wire core are prevented from being damaged by the peeling operation, the operation difficulty is reduced, and the labor intensity is reduced.

Description

Technical Field

[0001] The present application relates to the field of cable technology, and in particular to a signal cable that is resistant to peeling and damage. Background Art

[0002] The cable core of a multi-core signal cable usually contains multiple signal cores. When performing manual stripping operations, two steps are required: stripping the sheath and stripping the insulation. The insulation of each signal core needs to be stripped one by one. The steps are cumbersome, the operation is difficult, and the labor intensity of the operators is high. During the manual stripping of the sheath, employees who are not proficient in the operation are also prone to damage the sheath, core conductor and insulation layer, causing deformation of the cable core structure and affecting the stability of the electrical characteristics. Utility Model Content

[0003] The present application aims to solve the technical problem of providing a signal cable that is resistant to peeling and damage by improving the structure, which facilitates manual stripping operations and prevents damage to the sheath and wire core caused by the stripping operation. While ensuring the quality of manual stripping operations, it helps to reduce the difficulty of the operation and the labor intensity.

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

[0005] An anti-stripping and damage type signal cable comprises three signal conductors which are kept spaced apart from each other by a Y-shaped polyethylene isolation core and twisted together with a para-type fully aromatic copolyamide stretched fiber core material to form a cable core, a longitudinal hole is provided in the center of the Y-shaped polyethylene isolation core body, a twisted wire core is provided inside the longitudinal hole, an irradiation cross-linked linear low-density polyethylene sheath is coated on the outside of the cable core, a tear rope is provided between the para-type fully aromatic copolyamide stretched fiber core material and the irradiation cross-linked linear low-density polyethylene sheath, an axial stripping groove is provided on the outer surface of the irradiation cross-linked linear low-density polyethylene sheath in the axial direction to cooperate with the tear rope, the depth of the axial stripping groove is 0.05mm to 0.2mm, and the thickness of the irradiation cross-linked linear low-density polyethylene sheath is not less than 0.3mm.

[0006] Preferably, a polyurethane adhesive layer with a thickness of 3 μm to 8 μm is provided on the three branch end surfaces of the Y-shaped polyethylene isolation core.

[0007] Preferably, the thickness of the three branches of the Y-shaped polyethylene isolation core is not less than 0.5 mm.

[0008] Preferably, the twisted pair core comprises two insulated cores twisted together, and the insulated core comprises an inner conductor and an XLPE insulation layer.

[0009] Preferably, the inner conductor is composed of a number of tinned copper monofilaments with a diameter of 0.02 mm to 0.04 mm twisted together.

[0010] Preferably, the inner conductor lay length is 4 to 12 times the inner conductor diameter.

[0011] Preferably, the signal conductor diameter does not exceed 1.8 mm.

[0012] Preferably, the signal conductor is an oxygen-free copper solid conductor.

[0013] Preferably, the tear rope is made of aramid strands bonded and fixed by polypropylene adhesive.

[0014] Preferably, the cable core lay length is 10 to 20 times the diameter of the signal conductor.

[0015] Beneficial effects of this application:

[0016] 1. By removing the insulation layer of the original insulated signal core, effective insulation isolation is performed through the Y-shaped polyethylene isolation core, simplifying the stripping operation steps, and only the outer sheath needs to be stripped during manual stripping. In addition, an axial stripping groove is opened on the outer surface of the irradiated cross-linked linear low-density polyethylene sheath, and the optimized depth is 0.05mm to 0.2mm to ensure reasonable and effective mechanical strength of the sheath. When manually stripping the outer sheath, the sheath can be easily torn open at the axial stripping groove corresponding to the tear rope, which greatly reduces the difficulty of the operation, is beneficial to improving operation efficiency, reducing labor intensity, helping to improve the quality of manual stripping process, and ensuring stable and reliable electrical characteristics of the cable.

[0017] 2. The three signal conductor groups are separated and arranged by a Y-shaped polyethylene isolation core, and are twisted together with the para-type fully aromatic copolyamide stretched fiber core material to form a cable core. The cable core structure is balanced and stable. The para-type fully aromatic copolyamide stretched fiber core material has a large tensile elastic modulus, which improves the tensile resistance, helps to withstand lateral pressure during bending, reduces the load on the signal conductor, helps to prevent unexpected damage to the signal conductor during stripping operations, and ensures stable and reliable electrical properties of the cable, with better durability. 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-signal conductor, 2-Y-shaped polyethylene isolation core, 3-vertical hole, 4-twisted core, 5-irradiated cross-linked linear low-density polyethylene sheath, 6-tear rope, 7-axial stripping groove, 8-insulated core, 9-inner conductor, 10-XLPE insulation layer, 11-para-type fully aromatic copolyamide stretched fiber core material. 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 anti-peeling and damage type signal cable of the embodiment of the present application includes three signal conductors 1 which are kept apart from each other by a Y-shaped polyethylene isolation core 2 and are twisted together with a para-type fully aromatic copolyamide stretched fiber core material 11 to form a cable core. Furthermore, the three branches of the Y-shaped polyethylene isolation core 2 have a thickness of not less than 0.5 mm, and a polyurethane adhesive layer is provided on the end surfaces of the three branches of the Y-shaped polyethylene isolation core 2 with a thickness of 3 μm to 8 μm. Specifically, the signal conductor 1 is an oxygen-free copper solid conductor, and the diameter of the signal conductor 1 does not exceed 1.8 mm. The cable core lay length is 10 to 20 times the diameter of the signal conductor 1. A longitudinal hole 3 is provided at the center of the Y-shaped polyethylene isolation core 2, and a twisted core 4 is sleeved in the longitudinal hole 3. In one embodiment, the twisted core 4 includes two insulated cores 8 twisted together, and the insulated core 8 includes an inner conductor 9 and an XLPE insulation layer 10. Specifically, the inner conductor 9 is composed of a plurality of tinned copper monofilaments with a diameter of 0.02 mm to 0.04 mm, which are twisted concentrically. The twist pitch of the inner conductor 9 is 4 to 12 times the diameter of the inner conductor 9.

[0023] The cable core is externally coated with an irradiated cross-linked linear low-density polyethylene sheath 5, and the thickness of the irradiated cross-linked linear low-density polyethylene sheath 5 is not less than 0.3 mm. A tear rope 6 is provided between the para-type fully aromatic copolyamide stretched fiber core material and the irradiated cross-linked linear low-density polyethylene sheath 5. Specifically, the tear rope 6 is made of aramid strands bonded and fixed by a polypropylene adhesive. An axial stripping groove 7 is provided on the outer surface of the irradiated cross-linked linear low-density polyethylene sheath 5 in the axial direction to cooperate with the tear rope 6, and the depth of the axial stripping groove 7 is 0.05 mm to 0.2 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. Anti-stripping and damage type signal cable, its characteristics are: The invention comprises three signal conductors (1) which are kept spaced apart from each other by a Y-shaped polyethylene isolation core (2) and twisted together with a para-type fully aromatic copolyamide stretched fiber core material (11) to form a cable core. A longitudinal hole (3) is provided at the center of the Y-shaped polyethylene isolation core (2). A twisted wire core (4) is provided inside the longitudinal hole (3). The cable core is coated with an irradiated cross-linked linear low-density polyethylene sheath (5). A tear rope (6) is provided between the para-type fully aromatic copolyamide stretched fiber core material and the irradiated cross-linked linear low-density polyethylene sheath (5). An axial stripping groove (7) is provided on the outer surface of the irradiated cross-linked linear low-density polyethylene sheath (5) in the axial direction to cooperate with the tear rope (6). The depth of the axial stripping groove (7) is 0.05 mm to 0.2 mm. The thickness of the irradiated cross-linked linear low-density polyethylene sheath (5) is not less than 0.3 mm.

2. The anti-stripping and damage type signal cable according to claim 1 is characterized in that: The three branch end surfaces of the Y-shaped polyethylene isolation core (2) are provided with a polyurethane adhesive layer with a thickness of 3 μm to 8 μm.

3. The anti-stripping and damage type signal cable according to claim 1 is characterized in that: The thickness of the three branches of the Y-shaped polyethylene isolation core (2) is not less than 0.5 mm.

4. The anti-stripping and damage type signal cable according to claim 1 is characterized in that: The twisted wire core (4) comprises two insulated wire cores (8) twisted together, and the insulated wire core (8) comprises an inner conductor (9) and an XLPE insulation layer (10).

5. The anti-stripping and damage type signal cable according to claim 4 is characterized in that: The inner conductor (9) is composed of a plurality of tinned copper monofilaments having a diameter of 0.02 mm to 0.04 mm, which are coaxially twisted.

6. The anti-stripping and damage type signal cable according to claim 5, characterized in that: The lay length of the inner conductor (9) is 4 to 12 times the diameter of the inner conductor (9).

7. The anti-stripping and damage type signal cable according to claim 1, characterized in that: The diameter of the signal conductor (1) shall not exceed 1.8 mm.

8. The anti-stripping and damage type signal cable according to claim 1, characterized in that: The signal conductor (1) is a solid oxygen-free copper conductor.

9. The anti-stripping and damage type signal cable according to claim 1, characterized in that: The tear cord (6) is made of aramid strands bonded and fixed by a polypropylene adhesive.

10. The anti-stripping and damage type signal cable according to claim 1, characterized in that: The cable core lay length is 10 to 20 times the diameter of the signal conductor (1).

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