Cable against external impact

Abstract

This utility model belongs to the field of cable technology and discloses a cable resistant to external impact. It includes a conductor, a conductor shielding layer outside the conductor, an insulation layer outside the conductor shielding layer, an insulation shielding layer outside the insulation layer, and a metal shielding layer outside the insulation shielding layer. The conductor, conductor shielding layer, insulation layer, insulation shielding layer, and metal shielding layer constitute a conductor core. Multiple conductor cores are tangentially arranged to form a cable core. A filling layer is provided between the cable cores. A cable wrapping layer is provided outside the cable core and the filling layer. A buffer layer made of polymer foam is provided outside the cable wrapping layer. A sheath layer is provided outside the buffer layer. By incorporating rubber particles in the filling layer and providing a buffer layer on the periphery, the performance against external impact can be effectively improved, and the overall manufacturing cost of the cable can be reduced.

Description

Technical Field

[0001] This utility model belongs to the field of cable technology, and in particular relates to a cable resistant to external impact. Background Technology

[0002] With the continuous development of power systems, large electrical equipment is becoming larger, requiring thicker and heavier cables, especially steel-tape armored cables, where the steel tape accounts for almost half the cable's weight, posing challenges to cable laying. During installation, steel-tape armored cables are susceptible to deformation from external impacts, which is difficult to recover and can cause secondary damage to the cable.

[0003] Application number 2019108936351 discloses a cable that can protect the cable core. One or more air bladders are arranged along the cable's axial direction in the cavity inside the oxygen barrier layer. The bottom of each air bladder is fixed to the inner bottom of the oxygen barrier layer, and a support ring is fixed to the outer wall of the air bladder. The cable core passes through the support ring. The cavity of the oxygen barrier layer outside the air bladder and support ring is filled with a filler material, and the gas filled into the air bladder is nitrogen. However, this cable has a relatively complex manufacturing process, high cost, and low market competitiveness. Utility Model Content

[0004] The purpose of this utility model is to provide a cable that is resistant to external impact. By setting rubber particles in the filling layer and setting a buffer layer on the outside, the performance of the cable can be effectively improved and the overall manufacturing cost of the cable can be reduced.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An impact-resistant cable includes a conductor, a conductor shielding layer outside the conductor, an insulation layer outside the conductor shielding layer, an insulation shielding layer outside the insulation layer, and a metal shielding layer outside the insulation shielding layer. The conductor, conductor shielding layer, insulation layer, insulation shielding layer, and metal shielding layer constitute a wire core. Multiple wire cores are tangentially arranged to form a cable core. A filling layer is provided between the cable cores. A cable wrapping layer is provided outside the cable core and the filling layer. A buffer layer is provided outside the cable wrapping layer. The buffer layer is made of polymer foam material. A sheath layer is provided outside the buffer layer.

[0007] In a preferred embodiment, the conductor is formed by twisting and pressing together multiple annealed copper monofilaments, and the cross-sectional area of ​​the conductor is 25-500 mm². 2 The diameter of the copper monofilament ranges from 2.16 to 3.34 mm.

[0008] In a preferred embodiment, the conductor shielding layer is a carbon black-filled semiconducting material with a nominal thickness of 0.7 mm.

[0009] In a preferred embodiment, the insulation layer is formed by extruding cross-linked polyethylene insulation with a nominal thickness of 4.5 mm.

[0010] In a preferred embodiment, the insulating shielding layer is made of nano-modified material with a nominal thickness of 0.6 mm and carbon black.

[0011] In a preferred embodiment, the metal shielding layer is formed by overlapping and wrapping copper strips with a nominal thickness of 0.1 mm, and is used for electromagnetic shielding.

[0012] In a preferred embodiment, the filler layer is composed of polypropylene rope and rubber particles or rubber foam.

[0013] In a preferred embodiment, the cable wrapping layer is formed by overlapping two layers of non-woven fabric with a nominal thickness of 0.2 mm.

[0014] In a preferred embodiment, the sheath layer is extruded from polyvinyl chloride, polyethylene, or low-smoke halogen-free materials, with a nominal thickness ranging from 2.4 to 3.8 mm.

[0015] The beneficial effects of this utility model are:

[0016] By incorporating rubber granules into the filler layer and setting a buffer layer on the periphery, the cable's resistance to external impacts can be effectively improved, while reducing the overall manufacturing cost. The buffer layer is made of polymer foam material with a thermoplastic elastomer as the base material. After foaming, the material has a smooth surface and uniform internal air bubbles, exhibiting excellent resistance to external impacts and pressure. Compared to traditional metal armor layers, it has no hysteresis loss, effectively reducing cable weight and facilitating cable laying. This significantly improves power transmission efficiency and reduces the overall manufacturing cost of the cable. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the anti-external impact cable in this embodiment.

[0018] In the diagram: 1. Conductor; 2. Conductor shielding layer; 3. Insulation layer; 4. Insulation shielding layer; 5. Metal shielding layer; 6. Filler layer; 7. Cable wrapping layer; 8. Buffer layer; 9. Sheath layer. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figure 1A type of impact-resistant cable includes a conductor 1, a conductor shielding layer 2 outside the conductor 1, an insulation layer 3 outside the conductor shielding layer 2, an insulation shielding layer 4 outside the insulation layer 3, and a metal shielding layer 5 outside the insulation shielding layer 4. The conductor 1, conductor shielding layer 2, insulation layer 3, insulation shielding layer 4, and metal shielding layer 5 together form a wire core. Multiple wire cores are tangentially arranged to form a cable core. A filling layer 6 is provided between the cable cores. A cable wrapping layer 7 is provided outside the cable core and the filling layer. A buffer layer 8 is provided outside the cable wrapping layer 7. The buffer layer 8 is made of polymer foam material. A sheath layer 9 is provided outside the buffer layer 8.

[0021] The buffer layer 8 is preferably made of polymer foam material, which can be thermoplastic elastomer (TPE) foam, polyurethane (PU) foam, polystyrene (PS) foam, polyethylene (PE) foam, polypropylene (PP) foam, polyvinyl chloride (PVC) foam, or rubber foam (such as EPDM, NBR). Of course, bio-based / biodegradable foam materials (PLA (polylactic acid) foam, starch-based foam) or inorganic foam materials can also be used.

[0022] Preferredly, in this embodiment, the substrate of the buffer layer 8 is made of thermoplastic elastomer. After foaming, the material has a smooth surface and uniform internal bubbles, and has excellent resistance to external impact and pressure.

[0023] Specifically, conductor 1 is made of multiple annealed copper monofilaments twisted and pressed together, and the cross-sectional area of ​​conductor 1 is 25-500 mm². 2 The diameter of the copper monofilament ranges from 2.16 to 3.34 mm, and the diameter deviation is ±0.01 mm.

[0024] Specifically, the conductor shielding layer 2 is formed by extrusion of a high-electrical-performance semi-conductive material with a nominal thickness of 0.7 mm. Preferably, the semi-conductive material is a carbon black-filled semi-conductive material.

[0025] Specifically, insulation layer 3 is composed of cross-linked polyethylene insulation extruded with a nominal thickness of 4.5 mm, which has good chemical stability and excellent processing performance.

[0026] Specifically, the insulating shielding layer 4 is made of a semi-conductive material with excellent electrical properties with a nominal thickness of 0.6 mm, which is extruded. Preferably, the semi-conductive material is made of nano-modified material + carbon black.

[0027] Specifically, the metal shielding layer 5 is made of overlapping copper strips with a nominal thickness of 0.1 mm, used for electromagnetic shielding, and has excellent electromagnetic shielding performance.

[0028] Specifically, filler layer 6 is composed of polypropylene rope and rubber granules, or rubber foam. This ensures the stability of the cable core structure while providing resistance to external impacts and compression.

[0029] Specifically, the cable wrapping consists of 7 layers of non-woven fabric with a nominal thickness of 0.2mm, which are overlapped to provide good mechanical protection.

[0030] Specifically, sheath layer 9 is extruded from polyvinyl chloride, polyethylene, or low-smoke halogen-free materials, with a nominal thickness ranging from 2.4 to 3.8 mm, exhibiting good weather resistance and mechanical strength. Sheath layer 9 material not only possesses excellent electrical properties but also good weather resistance and mechanical strength. This effectively improves the safety and reliability of the cable, ensuring the safety of personnel and equipment.

[0031] This cable effectively improves its resistance to external impacts and reduces overall manufacturing costs by incorporating rubber granules in the filler layer and an outer buffer layer. The buffer layer is made of polymer foam with a thermoplastic elastomer as the base material. After foaming, the material has a smooth surface and uniform internal air bubbles, exhibiting excellent resistance to external impacts and pressure. Compared to traditional metal armor layers, it has no hysteresis loss, effectively reducing cable weight and facilitating cable laying. This significantly improves power transmission efficiency and reduces overall cable manufacturing costs.

[0032] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A cable resistant to external impact, comprising a conductor (1), characterized in that: The conductor (1) is provided with a conductor shielding layer (2) outside the conductor shielding layer (2), an insulation layer (3) is provided outside the conductor shielding layer (2), an insulation shielding layer (4) is provided outside the insulation layer (3), and a metal shielding layer (5) is provided outside the insulation shielding layer (4). The conductor (1), conductor shielding layer (2), insulation layer (3), insulation shielding layer (4), and metal shielding layer (5) form a wire core. Multiple wire cores are arranged in a tangential manner to form a cable core. A filling layer (6) is provided between the cable cores. A cable wrapping layer (7) is provided outside the cable core and the filling layer (6). A buffer layer (8) is provided outside the cable wrapping layer (7). The buffer layer (8) is made of polymer foam material. A sheath layer (9) is provided outside the buffer layer (8).

2. The impact-resistant cable according to claim 1, characterized in that: The conductor (1) is formed by twisting and pressing together multiple annealed copper monofilaments, and the cross-sectional area of ​​the conductor (1) is 25-500 mm². 2 The diameter of the copper monofilament ranges from 2.16 to 3.34 mm.

3. The impact-resistant cable according to claim 1, characterized in that: The conductor shielding layer (2) is a carbon black-filled semiconducting material with a nominal thickness of 0.7 mm.

4. The impact-resistant cable according to claim 1, characterized in that: The insulation layer (3) is composed of cross-linked polyethylene insulation extrusion with a nominal thickness of 4.5 mm.

5. The impact-resistant cable according to claim 1, characterized in that: The insulating shielding layer (4) is made of nano-modified material with a nominal thickness of 0.6 mm and carbon black.

6. The impact-resistant cable according to claim 1, characterized in that: The metal shielding layer (5) is made of overlapping copper strips with a nominal thickness of 0.1 mm, and is used for electromagnetic shielding.

7. The impact-resistant cable according to claim 1, characterized in that: The filling layer (6) is composed of polypropylene rope and rubber particles or rubber foam.

8. The impact-resistant cable according to claim 1, characterized in that: The cable wrapping layer (7) is made of two layers of non-woven fabric with a nominal thickness of 0.2 mm.

9. The impact-resistant cable according to claim 1, characterized in that: The sheath layer (9) is extruded from polyvinyl chloride, polyethylene or low smoke halogen-free material, and its nominal thickness ranges from 2.4 to 3.8 mm.

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