Self-supporting filling type telephone cable
By designing a self-supported fill-type telephone cable, using a fill-type wire core, a load-bearing stranded wire and an irradiated cross-linked linear low-density polyethylene outer sheath layer, the existing cable lacks self-carrying and waterproofing and moisture-proof performance, achieving higher durability and safety.
Patent Information
- Application Number
- CN202421577009.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-05
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-07-05
AI Technical Summary
Existing telephone cables lack self-loading performance and are difficult to adapt to overhead laying. In the face of environmental conditions such as sunshine, temperature changes, waterproof and moisture-proof, and ground chemicals, their performance is insufficient, which increases safety hazards.
A self-supported fill-type telephone cable is designed, which adopts spaced-arranged fill-type wire cores and load-bearing strands, and is jointly coated in the outer sheath layer of irradiated cross-linked linear low-density polyethylene, adding connecting ribs and multiple pairs of stranded wire groups, and filling the gap of the cable core with regular pentagonal polyurethane elastomer and petroleum paste to enhance mechanical strength and waterproof performance.
It realizes the self-load-bearing performance of the cable, is suitable for overhead laying, enhances moisture-proof and waterproof performance, reduces safety hazards, and improves durability and service life.
Smart Images
Figure CN222883269U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cables, in particular to a self-supporting filled telephone cable. Background Art
[0002] Cables can be divided into power cables, communication cables, and control cables according to their uses. Telephone cables suitable for access or backbone networks can be used to connect telephone exchanges to user areas, such as pipeline laying and direct burial. Filled cables can be used for user access lines and can be laid and installed in complex and changeable underground or along sidewalks. However, when overhead laying is only possible under certain external environments, a self-supporting cable structure is required. However, general telephone cables do not have their own load-bearing performance, and overhead laying and installation are difficult. In addition, they also need to be able to resist sunlight, temperature changes, waterproofing, moisture resistance, erosion by ground chemicals and other environmental conditions. Ordinary telephone cables are difficult to replace. Utility Model Content
[0003] The utility model aims to solve the technical problem of providing a self-supporting filled telephone cable with its own load-bearing performance, suitable for overhead laying, better moisture-proof and waterproof performance, excellent weather resistance, reduced safety hazards, and durable application.
[0004] The utility model solves the above technical problems through the following technical solutions.
[0005] A self-supporting filled telephone cable comprises a filled core and a load-bearing stranded wire arranged at intervals and coated together in an irradiated cross-linked linear low-density polyethylene outer sheath layer, wherein the irradiated cross-linked linear low-density polyethylene outer sheath layer is provided with connecting ribs on the interval section between the filled core and the load-bearing stranded wire, the filled core comprises five multi-pair twisted wire groups uniformly distributed circumferentially around a regular pentagonal polyurethane elastomer filling core and twisted together to form a cable core, the gap between the cable core is filled with petroleum jelly, the outer part of the cable core is sequentially coated with a fluororubber belt moisture-proof longitudinal sheath, an EVA water-blocking inner bonding layer, an aluminum-plastic composite belt longitudinal waterproof shielding layer, an irradiated cross-linked linear low-density polyethylene inner cushion layer and an EVA water-blocking outer bonding layer, a sheet-shaped grounding copper foil is provided between the aluminum-plastic composite belt longitudinal waterproof shielding layer and the irradiated cross-linked linear low-density polyethylene inner cushion layer, the multi-pair twisted wire group comprises ten pairs of twisted wires twisted together with a para-type fully aromatic copolyamide stretched fiber filling core material and fixed by wrapping with a Kevlar wire.
[0006] Preferably, a center hole is provided in the center of the regular pentagonal polyurethane elastomer filling core, a nylon rope is sleeved in the center hole, and five longitudinal holes are evenly distributed around the center hole at the five corners of the regular pentagonal polyurethane elastomer filling core.
[0007] Preferably, the twisted pair wire comprises two insulated cores twisted together, and the insulated core comprises a solid annealed copper conductor and an XLPE insulation layer.
[0008] Preferably, the solid annealed copper conductor has a diameter of 0.4 mm, 0.5 mm, 0.6 mm or 0.9 mm.
[0009] Preferably, the thickness of the XLPE insulation layer is 0.175 mm, 0.2 mm, 0.3 mm or 0.375 mm.
[0010] Preferably, the ten pairs of twisted wires in each group of multiple twisted wire pairs have the same lay direction and different lay lengths.
[0011] Preferably, the winding direction of the Kevlar wire is opposite to the twisting direction of the twisted wires.
[0012] Preferably, the aluminum-plastic composite tape longitudinally wrapped waterproof shielding layer is an aluminum-plastic composite tape longitudinally overlapped wrapped structure, and the aluminum-plastic composite tape is formed by a composite of an MDPE water-blocking inner layer, an aluminum foil layer and an LDPE water-blocking outer layer.
[0013] Preferably, the thickness ratio of the MDPE water-blocking inner layer to the LDPE water-blocking outer layer is 1:1 to 1:5.
[0014] Preferably, the aluminum-plastic composite tape has a thickness of 0.15 mm to 0.2 mm.
[0015] Beneficial effects of the utility model:
[0016] 1. The self-supporting cable bearing structure is adopted to increase the bearing capacity of the bearing stranded wire with high tensile strength. It can be flexibly applied to various overhead installation environments, reduce the difficulty of installation and construction, and has better durability.
[0017] 2. Five pairs of twisted wires are twisted together through a regular pentagonal polyurethane elastomer filling core, which will prevent the core from being strung together. The internal structure of the cable core is more rounded and balanced. The polyurethane elastomer has good physical and mechanical properties, enhances the mechanical strength, and the cable core structure is not easily deformed. There are five longitudinal holes on the five corners of the regular pentagonal polyurethane elastomer filling core, which helps to reduce the vibration load and the lateral pressure on each pair of twisted wires inside the cable core, prevent wire and core breakage, ensure stable and reliable electrical properties, and better durability.
[0018] 3. By filling petroleum jelly in the gap of the cable core to prevent longitudinal water seepage and improving the structure of the longitudinal waterproof shielding layer of the aluminum-plastic composite tape, it can provide shielding coverage and prevent water vapor intrusion. The aluminum-plastic composite tape is formed by the MDPE water-blocking inner layer, the aluminum foil layer and the LDPE water-blocking outer layer, and has better water-blocking properties. An EVA water-blocking adhesive layer is added between the fluororubber tape moisture-proof longitudinal sheath and the aluminum-plastic composite tape longitudinal waterproof shielding layer to enhance the performance of blocking water vapor from diffusing into the cable core. The original tinned copper wire is replaced by a sheet-shaped grounding copper foil. The sheet-shaped grounding copper foil has a small thickness, which helps to fit closely with the inner cushion layer and is not easy to produce gaps. An EVA water-blocking adhesive layer is added between the irradiated cross-linked linear low-density polyethylene inner cushion layer and the outer sheath layer to form a bonded integrated structure, improve the mechanical strength of the sheath, effectively protect the cable sheath, increase the water-blocking performance, improve the safety and reliability of the cable, reduce safety hazards, and improve durability. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the cross-sectional structure of an embodiment of the utility model.
[0020] In the figure: 1-filled core, 2-load-bearing stranded wire, 3-irradiated cross-linked linear low-density polyethylene outer sheath layer, 4-connecting ribs, 5-multiple twisted wire groups, 6-regular pentagonal polyurethane elastomer filling core, 7-petroleum jelly, 8-fluororubber tape moisture-proof longitudinal sheath, 9-EVA water-blocking inner bonding layer, 10-aluminum-plastic composite tape longitudinal waterproof shielding layer, 11-irradiated cross-linked linear low-density polyethylene inner cushion layer, 12-EVA water-blocking outer bonding layer, 13-sheet grounding copper foil, 14-twisted wire pairs, 15-para-type fully aromatic copolyamide stretched fiber filling core material, 16-center hole, 17-nylon rope, 18-longitudinal hole, 19-insulated core, 20-solid annealed copper conductor, 21-XLPE insulation layer. DETAILED DESCRIPTION
[0021] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.
[0022] like Figure 1 As shown, the self-supporting filled telephone cable of the embodiment of the utility model comprises a filling core 1 and a load-bearing stranded wire 2 arranged at intervals and jointly coated in a radiation cross-linked linear low-density polyethylene outer sheath layer 3, wherein the radiation cross-linked linear low-density polyethylene outer sheath layer 3 is provided with connecting ribs 4 on the interval section between the filling core 1 and the load-bearing stranded wire 2.
[0023] The filled core 1 includes five pairs of twisted wires 5 uniformly distributed around a regular pentagonal polyurethane elastomer filling core 6 and twisted together to form a cable core. Further, a center hole 16 is opened in the center of the regular pentagonal polyurethane elastomer filling core 6, and a nylon rope 17 is sleeved in the center hole 16. Five vertical holes 18 are uniformly distributed around the center hole 16 at the five corners of the regular pentagonal polyurethane elastomer filling core 6. The gap of the cable core is filled with petroleum jelly 7. The multi-pair twisted wire group 5 includes ten pairs of twisted wires 14 and a para-type fully aromatic copolyamide stretched fiber filling core material 15 twisted together and fixed by Kevlar wire wrapping. Further, the winding direction of the Kevlar wire is opposite to the twisting direction of the twisted wires 14. In one embodiment, the twisted wire 14 includes two insulated wire cores 19 twisted together, and the insulated wire core 19 includes a solid annealed copper conductor 20 and an XLPE insulation layer 21. Specifically, the solid annealed copper conductor 20 has a diameter of 0.4 mm, 0.5 mm, 0.6 mm or 0.9 mm. The thickness of the XLPE insulation layer 21 is 0.175 mm, 0.2 mm, 0.3 mm or 0.375 mm. The ten pairs of twisted wires 14 of each group of multiple twisted wire groups 5 have the same twist direction and different twist lengths.
[0024] The cable core is coated with a fluororubber tape moisture-proof longitudinal sheath 8, an EVA water-blocking inner bonding layer 9, an aluminum-plastic composite tape longitudinally wrapped waterproof shielding layer 10, an irradiated cross-linked linear low-density polyethylene inner cushion layer 11 and an EVA water-blocking outer bonding layer 12 in sequence, and a sheet-shaped grounding copper foil 13 is provided between the aluminum-plastic composite tape longitudinally wrapped waterproof shielding layer 10 and the irradiated cross-linked linear low-density polyethylene inner cushion layer 11. In one embodiment, the aluminum-plastic composite tape longitudinally wrapped waterproof shielding layer 10 is an aluminum-plastic composite tape longitudinally overlapped wrapped structure, and the aluminum-plastic composite tape is formed by a composite of an MDPE water-blocking inner layer, an aluminum foil layer and an LDPE water-blocking outer layer. 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 tape is 0.15 mm to 0.2 mm.
[0025] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present 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 present application shall be subject to the attached claims.
Claims
1. Self-supporting filled telephone cable, characterized by: The invention comprises a filling type core (1) and a load-bearing strand (2) arranged at intervals and jointly coated in an outer sheath layer (3) of irradiated cross-linked linear low-density polyethylene, wherein the outer sheath layer (3) of irradiated cross-linked linear low-density polyethylene is provided with a connecting rib (4) on the interval section between the filling type core (1) and the load-bearing strand (2), the filling type core (1) comprises five pairs of stranded wire groups (5) uniformly distributed circumferentially around a regular pentagonal polyurethane elastomer filling core (6) and jointly twisted to form a cable core, the gap between the cable core is filled with petroleum jelly (7), and the outside of the cable core is successively coated with A fluororubber belt moisture-proof longitudinal sheath (8), an EVA water-blocking inner bonding layer (9), an aluminum-plastic composite belt longitudinally wrapped waterproof shielding layer (10), an irradiated cross-linked linear low-density polyethylene inner cushion layer (11), and an EVA water-blocking outer bonding layer (12); a sheet-shaped grounding copper foil (13) is provided between the aluminum-plastic composite belt longitudinally wrapped waterproof shielding layer (10) and the irradiated cross-linked linear low-density polyethylene inner cushion layer (11); and the plurality of twisted wire pairs (5) include ten twisted wire pairs (14) twisted together with a para-type fully aromatic copolyamide stretched fiber filling core material (15) and fixed by wrapping with a Kevlar wire.
2. The self-supporting filled telephone cable according to claim 1, characterized in that: A central hole (16) is provided at the center of the regular pentagonal polyurethane elastomer filling core (6), a nylon rope (17) is sleeved inside the central hole (16), and five longitudinal holes (18) are evenly distributed circumferentially around the central hole (16) at the five corners of the regular pentagonal polyurethane elastomer filling core (6).
3. The self-supporting filled telephone cable according to claim 1, characterized in that: The twisted pair wire (14) comprises two insulated wire cores (19) twisted together, wherein the insulated wire core (19) comprises a solid annealed copper conductor (20) and an XLPE insulation layer (21).
4. The self-supporting filled telephone cable according to claim 3, characterized in that: The solid annealed copper conductor (20) has a diameter of 0.4 mm, 0.5 mm, 0.6 mm or 0.9 mm.
5. The self-supporting filled telephone cable according to claim 3, characterized in that: The XLPE insulation layer (21) has a thickness of 0.175 mm, 0.2 mm, 0.3 mm or 0.375 mm.
6. The self-supporting filled telephone cable according to claim 1, characterized in that: The ten pairs of twisted wires (14) in each group of multiple twisted wire pairs (5) have the same twist direction and different twist lengths.
7. The self-supporting filled telephone cable according to claim 1, characterized in that: The winding direction of the Kevlar wire is opposite to the twisting direction of the twisted wire (14).
8. The self-supporting filled telephone cable according to claim 1, characterized in that: The aluminum-plastic composite tape longitudinally wrapped waterproof shielding layer (10) is an aluminum-plastic composite tape longitudinally overlapped wrapped structure, and the aluminum-plastic composite tape is formed by a composite of an MDPE water-blocking inner layer, an aluminum foil layer and an LDPE water-blocking outer layer.
9. The self-supporting filled telephone cable according to claim 8, characterized in that: The thickness ratio of the MDPE water-blocking inner layer to the LDPE water-blocking outer layer is 1:1 to 1:
5.
10. The self-supporting filled telephone cable according to claim 1, characterized in that: The thickness of the aluminum-plastic composite strip is 0.15 mm to 0.2 mm.