CN222883269U - Self-supporting filling telephone cable - Google Patents

Abstract

The utility model discloses a self-supporting filling type telephone cable, which comprises filling type wire cores and bearing stranded wires which are arranged at intervals and are jointly coated in an irradiation crosslinking linear low-density polyethylene outer sheath layer, wherein the filling type wire cores comprise five pairs of stranded wire groups which are uniformly distributed around a regular pentagonal polyurethane elastomer filling core in the circumferential direction and are jointly stranded to form a cable core, petroleum jelly is filled in a cable core gap, a fluorine rubber belt dampproof longitudinal coating layer, an EVA water-blocking inner bonding layer, an aluminum-plastic composite belt longitudinal coating waterproof shielding layer, an irradiation crosslinking linear low-density polyethylene inner cushion layer and an EVA water-blocking outer bonding layer are sequentially coated outside the cable core, and a sheet-shaped grounding copper foil is arranged between the aluminum-plastic composite belt longitudinal coating waterproof shielding layer and the irradiation crosslinking linear low-density polyethylene inner cushion layer. The telephone cable is suitable for overhead laying, has better dampproof and waterproof performances, excellent weather resistance and durable application.

Description

Self-supporting filling telephone cable

Technical Field

The utility model relates to the technical field of cables, in particular to a self-supporting filling telephone cable.

Background

The cable may be classified into a power cable, a communication cable, a control cable, and the like according to its use. The cable is suitable for telephone cable of access or backbone network, can be used for connecting telephone office to user area, for example, pipeline laying, direct burial laying, filling cable can be suitable for user access line, and can be laid and installed along complicated and changeable underground or sidewalk. However, when only overhead laying is possible under specific external conditions, it is necessary to provide a self-supporting cable structure. However, the common telephone cable does not have the self-bearing performance, the overhead laying and installation difficulty is high, and the common telephone cable also needs to have the performances of resisting sunlight, temperature change, water and moisture resistance, corrosion of ground chemical substances and other environmental conditions and the like, and is difficult to replace and apply.

Disclosure of utility model

Aiming at the defects of the prior art, the utility model aims to provide the self-supporting filling type telephone cable which has self-bearing performance, is suitable for overhead laying, has better moistureproof and waterproof performance and excellent weather resistance, reduces potential safety hazard and is durable to apply.

The utility model solves the technical problems through the following technical proposal.

The self-supporting filling type telephone cable comprises filling type wire cores and bearing strands which are arranged at intervals and are jointly coated in an irradiation crosslinking linear low-density polyethylene outer sheath layer, wherein connecting ribs are formed on intervals between the filling type wire cores and the bearing strands, the filling type wire cores comprise five pairs of twisted wire groups which are uniformly distributed around a regular pentagonal polyurethane elastomer filling core circumference and are jointly twisted to form a cable core, petroleum jelly is filled in a cable core gap, a fluorine rubber belt dampproof longitudinal coating layer, an EVA water blocking inner bonding layer, an aluminum plastic composite belt longitudinal coating waterproof shielding layer, an irradiation crosslinking linear low-density polyethylene inner cushion layer and an EVA water blocking outer bonding layer are sequentially coated outside the cable core, sheet-shaped grounding copper foil is arranged between the aluminum plastic composite belt longitudinal coating waterproof shielding layer and the irradiation crosslinking linear low-density polyethylene inner cushion layer, and the pairs of twisted wire groups comprise ten pairs of twisted wire groups and a para-position type wholly aromatic copolyamide stretching fiber filling core material which are jointly twisted and fixed through a Kevlar wire in a surrounding mode.

Preferably, the central part of the regular pentagonal polyurethane elastomer filling core is provided with a central hole, nylon ropes are sleeved in the central hole, and five longitudinal holes are uniformly distributed around the central hole in the five corners of the regular pentagonal polyurethane elastomer filling core.

Preferably, the twisted pair wire comprises two insulated wire cores, and the insulated wire cores comprise solid annealed copper conductors and XLPE insulation layers.

Preferably, the solid annealed copper conductor has a diameter of 0.4mm, 0.5mm, 0.6mm or 0.9mm.

Preferably, the XLPE insulation layer thickness is 0.175mm, 0.2mm, 0.3mm or 0.375mm.

Preferably, ten pairs of twisted wires of each multi-pair twisted wire group are twisted in the same direction and have different pitches.

Preferably, the kevlar wire is wound in the opposite direction to the twisted pair of wires.

Preferably, the longitudinal wrapping waterproof shielding layer of the aluminum-plastic composite belt is of a longitudinal lap wrapping structure of the aluminum-plastic composite belt, and the aluminum-plastic composite belt is formed by compositing an MDPE water-blocking inner layer, an aluminum foil layer and an LDPE water-blocking outer layer.

Preferably, the thickness ratio of the MDPE water-blocking inner layer to the LDPE water-blocking outer layer is 1:1 to 1:5.

Preferably, the thickness of the aluminum-plastic composite belt is 0.15mm to 0.2mm.

The utility model has the beneficial effects that:

1. The self-supporting cable bearing structure is adopted, the bearing stranded wires are increased to have high tensile strength bearing performance, the self-supporting cable bearing structure can be flexibly applied to various overhead laying and installing environments, the installing and constructing difficulty is reduced, and the durability is better.

2. The five pairs of stranded wires are twisted together through the regular pentagon polyurethane elastomer filling core, the core stringing cannot occur, the cable core internal structure is more round and balanced, the polyurethane elastomer has good physical and mechanical properties, the mechanical strength is enhanced, the cable core structure is not easy to deform, five longitudinal holes are distributed on five corners of the regular pentagon polyurethane elastomer filling core, the vibration load is reduced, the lateral pressure born by each pair of stranded wires in the cable core is reduced, the occurrence of broken wires and broken cores is prevented, the stable and reliable electrical characteristics are ensured, and the durability and the usability are better.

3. The waterproof shielding layer structure is longitudinally wrapped through the petroleum jelly filled in the gap of the cable core, shielding coverage can be provided, water vapor invasion can be prevented, the aluminum plastic composite belt is formed by compositing an MDPE waterproof inner layer, an aluminum foil layer and an LDPE waterproof outer layer, the water blocking characteristic is better, an EVA waterproof bonding layer is added between the fluororubber belt dampproof longitudinal wrapping layer and the aluminum plastic composite belt longitudinal wrapping waterproof shielding layer, the water vapor blocking and cable core diffusion performance is enhanced, the original tin-plated copper wire beating line is replaced by the sheet-shaped grounding copper foil, the sheet-shaped grounding copper foil is small in thickness, close fit with an inner cushion layer is facilitated, and gaps are not easy to generate. An EVA water-blocking adhesive layer is added between the irradiation crosslinking linear low-density polyethylene inner cushion layer and the outer sheath layer to form an adhesive integrated structure, so that the mechanical strength of the sheath is improved, an effective protection effect is achieved on the cable sheath, the water-blocking performance is improved, the safety and reliability of the cable are improved, the potential safety hazard is reduced, and the durability is improved.

Drawings

FIG. 1 is a schematic cross-sectional view of an embodiment of the present utility model.

In the figure, a 1-filled wire core, a 2-bearing stranded wire, a 3-irradiation crosslinking linear low-density polyethylene outer sheath layer, a 4-connecting rib, a 5-multi-pair stranded wire group, a 6-regular pentagonal polyurethane elastomer filled core, 7-petroleum jelly, an 8-fluororubber belt moisture-proof longitudinal cladding, a 9-EVA water-blocking inner bonding layer, a 10-aluminum plastic composite belt longitudinal cladding waterproof shielding layer, an 11-irradiation crosslinking linear low-density polyethylene inner cushion layer, a 12-EVA water-blocking outer bonding layer, a 13-sheet-shaped grounding copper foil, a 14-pair stranded wire, a 15-para-type wholly aromatic copolyamide stretched fiber filled core material, a 16-central hole, 17-nylon rope, 18-longitudinal holes, a 19-insulated wire core, a 20-solid annealed copper conductor and a 21-XLPE insulated layer.

Detailed Description

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

As shown in fig. 1, the self-supporting filling type telephone cable of the embodiment of the utility model comprises a filling type wire core 1 and a bearing stranded wire 2 which are arranged at intervals and are jointly coated in an irradiation crosslinking linear low-density polyethylene outer sheath layer 3, wherein the irradiation crosslinking linear low-density polyethylene outer sheath layer 3 is provided with connecting ribs 4 on a spacing section between the filling type wire core 1 and the bearing stranded wire 2.

The filling wire core 1 comprises five pairs of stranded wire groups 5 which are circumferentially uniformly distributed around a regular pentagon polyurethane elastomer filling core 6 and are twisted together to form a cable core, further, a central hole 16 is formed in the central portion of the regular pentagon polyurethane elastomer filling core 6, nylon ropes 17 are sleeved in the central hole 16, and five longitudinal holes 18 are circumferentially uniformly distributed around the central hole 16 on five corners of the regular pentagon polyurethane elastomer filling core 6. The cable core gap is filled with petroleum jelly 7. The multi-twisted wire set 5 comprises ten pairs of twisted wires 14 and a para-type wholly aromatic copolyamide stretched fiber filling core material 15 which are twisted together and fixed through Kevlar wire wrapping, and further, the Kevlar wire wrapping direction is opposite to the twisting direction of the twisted wires 14. In one embodiment, the twisted pair 14 comprises two pairs of insulated wire cores 19, wherein the insulated wire cores 19 comprise solid annealed copper conductors 20 and XLPE insulation layers 21, and in particular, the solid annealed copper conductors 20 have a diameter of 0.4mm, 0.5mm, 0.6mm or 0.9mm. The XLPE insulation layer 21 has a thickness of 0.175mm, 0.2mm, 0.3mm or 0.375mm. The ten pairs of twisted wires 14 of each multi-pair twisted wire group 5 are twisted in the same direction and have different pitches.

The cable core is sequentially coated with a fluorine rubber belt dampproof longitudinal coating 8, an EVA water-blocking inner bonding layer 9, an aluminum-plastic composite belt longitudinal coating waterproof shielding layer 10, an irradiation crosslinking linear low-density polyethylene inner cushion layer 11 and an EVA water-blocking outer bonding layer 12, and a sheet-shaped grounding copper foil 13 is arranged between the aluminum-plastic composite belt longitudinal coating waterproof shielding layer 10 and the irradiation crosslinking linear low-density polyethylene inner cushion layer 11. In one embodiment, the waterproof shielding layer 10 is a longitudinally lapped and wrapped structure of an aluminum-plastic composite tape, the aluminum-plastic composite tape is formed by compositing an MDPE water-blocking inner layer, an aluminum foil layer and an LDPE water-blocking outer layer, and further, the thickness ratio of the MDPE water-blocking inner layer to the LDPE water-blocking outer layer is 1:1 to 1:5. The thickness of the aluminum-plastic composite belt is 0.15mm to 0.2mm.

The foregoing examples illustrate only a few embodiments of the application and are described in detail herein without thereby limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (10)

1. The self-supporting filling type telephone cable is characterized by comprising a filling type cable core (1) and bearing strands (2) which are arranged at intervals and jointly coated in an irradiation crosslinking linear low-density polyethylene outer sheath layer (3), wherein the irradiation crosslinking linear low-density polyethylene outer sheath layer (3) is formed with connecting ribs (4) on intervals between the filling type cable core (1) and the bearing strands (2), the filling type cable core (1) comprises five pairs of strand groups (5) which are uniformly distributed around a regular pentagonal polyurethane elastomer filling core (6) in the circumferential direction and jointly stranded to form a cable core, a petroleum jelly (7) is filled in a cable core gap, a fluororubber belt moisture-proof longitudinal coating layer (8), an EVA water-blocking inner adhesive layer (9), an aluminum plastic composite belt longitudinal-wrapping waterproof shielding layer (10), an irradiation crosslinking linear low-density polyethylene inner cushion layer (11) and an EVA outer adhesive layer (12) are sequentially coated outside the cable core, a sheet-shaped copper foil (13) is arranged between the irradiation crosslinking linear low-density polyethylene inner cushion layer (11), and the pairs of strand groups (5) are fixedly connected through a co-twisted pair of polyamide (15) and fully-twisted fiber-reinforced co-filled type fiber.

2. The self-supporting filling type telephone cable according to claim 1, wherein a central hole (16) is formed in the central portion of the regular pentagonal polyurethane elastomer filling core (6), nylon ropes (17) are sleeved in the central hole (16), and five longitudinal holes (18) are uniformly distributed around the central hole (16) on five corners of the regular pentagonal polyurethane elastomer filling core (6).

3. The self-supporting filled telephone cable of claim 1 wherein said twisted pair wire (14) comprises two insulated wire cores (19) twisted pair, said insulated wire cores (19) comprising a solid annealed copper conductor (20) and an XLPE insulation layer (21).

4. A self-supporting filled telephone cable as claimed in claim 3, wherein said solid annealed copper conductor (20) has a diameter of 0.4mm, 0.5mm, 0.6mm or 0.9mm.

5. A self-supporting filled telephone cable as claimed in claim 3, wherein said XLPE insulation layer (21) has a thickness of 0.175mm, 0.2mm, 0.3mm or 0.375mm.

6. The self-supporting filled telephone cable of claim 1, wherein ten pairs of twisted wires (14) of each of the plurality of twisted wire sets (5) are twisted in the same direction and are different in lay length.

7. The self-supporting filled telephone cable of claim 1, wherein the Kevlar wire is wound in a direction opposite to the lay direction of the twisted pair wire (14).

8. The self-supporting filling type telephone cable of claim 1, wherein the aluminum-plastic composite tape longitudinally-wrapped waterproof shielding layer (10) is of an aluminum-plastic composite tape longitudinally-lapped wrapping structure, and the aluminum-plastic composite tape is formed by compositing an MDPE water-blocking inner layer, an aluminum foil layer and an LDPE water-blocking outer layer.

9. The self-supporting filled telephone cable of claim 8 wherein the thickness ratio of said MDPE water-blocking inner layer to said LDPE water-blocking outer layer is from 1:1 to 1:5.

10. The self-supporting, filled telephone cable of claim 1, wherein the aluminum-plastic composite tape has a thickness of 0.15mm to 0.2mm.