Armored aluminum alloy power cable

Abstract

The utility model provides an armored aluminum alloy power cable, comprising aluminum alloy conductors which are formed by twisting aluminum alloy wires and are used for transmitting current; the insulating layer tightly wraps the outer side of the aluminum alloy conductor, is made of a crosslinked polyethylene material and is used for preventing current leakage of the aluminum alloy conductor; and the armor layer is arranged outside the insulating layer, is formed by spirally winding a double-layer galvanized steel strip, and is used for protecting the insulating layer. The aluminum alloy conductors are arranged, so that the overall flexibility of the cable is improved, the influence of the skin effect is effectively reduced, good conductivity and mechanical strength under different temperature and environment conditions are guaranteed, the insulating layer is arranged, the stable insulating effect can be kept under the high-temperature environment, current leakage is effectively avoided, and the service life of the cable is prolonged. The aluminum alloy conductor and the insulating layer are arranged to provide important guarantee for safe operation of the cable, and through the arrangement of the armor layer, external physical damage can be effectively resisted, and the internal aluminum alloy conductor and the insulating layer are protected from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of power cables, in particular to an armored aluminum alloy power cable. Background Art

[0002] Armored power cable is a wire and cable product with a special structure. Armored power cable is composed of conductors of different materials installed in a metal sheath with insulating material. The main function of the armor layer is to enhance the mechanical strength of the cable, improve the cable's compression, tensile, wear resistance and other properties, and prevent erosion and damage from the external environment.

[0003] Current aluminum alloy power cables have shortcomings in use. Due to the physical properties of aluminum alloy itself, its conductivity is usually lower than that of other metal materials such as pure copper, which may affect the transmission efficiency of the cable. In addition, during long-term use, the cable may suffer from wear, especially under high load or harsh environment, which will reduce its service life and reliability. For this reason, we provide an armored aluminum alloy power cable. Utility Model Content

[0004] The utility model provides an armored aluminum alloy power cable to solve the technical problems existing in the above background technology.

[0005] The purpose and function of the utility model of an armored aluminum alloy power cable are achieved by the following specific technical means: an armored aluminum alloy power cable, comprising:

[0006] Aluminum alloy conductors, made of twisted aluminum alloy wires, are used to transmit current;

[0007] The insulation layer is tightly wrapped around the outside of the aluminum alloy conductor and is made of cross-linked polyethylene material to prevent current leakage from the aluminum alloy conductor;

[0008] The armor layer is arranged outside the insulation layer and is made of double-layer galvanized steel strips spirally wound to protect the insulation layer.

[0009] Preferably, a shielding layer is provided between the insulating layer and the aluminum alloy conductor, and the shielding layer is made of metallized polyester film material.

[0010] Preferably, a flame retardant layer is filled between the double-layer galvanized steel strips of the armor layer.

[0011] Preferably, a sheath layer is further provided on the outside of the armor layer, and the sheath layer is made of polyvinyl chloride material.

[0012] Preferably, the surface of the double-layer galvanized steel strip of the armor layer is coated with an anti-corrosion coating to prevent the double-layer galvanized steel strip from rusting.

[0013] Preferably, a moisture-proof sealing layer is provided between the aluminum alloy conductor and the insulating layer, and the moisture-proof sealing layer is located outside the shielding layer, and the moisture-proof sealing layer is made of silicone rubber material.

[0014] Preferably, a buffer layer is provided between the armor layer and the insulation layer, and the buffer layer is made of high-density polyethylene material.

[0015] Preferably, the thickness of the insulating layer is 3.5 mm to 5 mm.

[0016] Beneficial effects:

[0017] 1. The aluminum alloy conductor is provided to improve the overall flexibility of the cable and effectively reduce the influence of the skin effect, thereby ensuring good electrical conductivity and mechanical strength under different temperature and environmental conditions. The insulation layer is provided to maintain a stable insulation effect even in high temperature environments, effectively avoiding current leakage, providing an important guarantee for the safe operation of the cable. The armor layer is provided to effectively resist external physical damage and protect the internal aluminum alloy conductor and insulation layer from damage.

[0018] 2. The shielding layer can effectively reduce electromagnetic interference, improve the electrical stability of the cable, and enhance the weather resistance of the cable, ensuring that the cable can operate safely and reliably in complex environments. The sheath layer can give the cable good wear resistance and enhance its corrosion resistance, thereby effectively protecting the armor layer from external wear and chemical erosion, significantly improving the overall service life of the cable. The buffer layer can effectively absorb the impact force applied to the cable from the outside and reduce the pressure of the armor layer on the insulation layer, thereby significantly improving the impact resistance of the cable and ensuring that the internal structure of the cable will not be damaged when it is hit by external force. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model.

[0020] Figure 2 It is a cross-sectional view of the front view of the insulating layer of the present invention.

[0021] Figure 3 It is a cross-sectional view of the front view of the armor layer of the present invention.

[0022] Figure 1-3 , the corresponding relationship between component names and figure numbers is as follows:

[0023] 1. Aluminum alloy conductor; 2. Insulation layer; 3. Armor layer; 4. Shielding layer; 5. Flame retardant layer; 6. Sheath layer; 7. Anti-corrosion coating; 8. Moisture-proof sealing layer; 9. Buffer layer. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] First embodiment

[0026] As attached Figure 1 As shown: An armored aluminum alloy power cable, comprising: an aluminum alloy conductor 1, which is twisted by aluminum alloy wires for transmitting current, which not only enhances the mechanical strength of the cable, but also ensures that it can maintain good electrical conductivity under various environmental conditions, can improve the flexibility of the cable and reduce the influence of the skin effect. In addition, the twisted structure of the aluminum alloy conductor 1 adopts a compact twisting method, in which multiple single-filament aluminum alloy wires are twisted through a specific mold, and a certain pressure is applied during the twisting process, so that the cross-section of the conductor after twisting is more rounded, which not only increases the contact area between the aluminum alloy conductor 1 and the insulating layer 2, but also significantly improves the electrical performance and mechanical strength of the cable, effectively overcoming the problem of irregular conductor cross-section in the traditional twisted structure.

[0027] Second embodiment

[0028] As attached Figure 1 and attached Figure 2 As shown: The insulating layer 2 is tightly wrapped around the outside of the aluminum alloy conductor 1 and is made of cross-linked polyethylene material. It is used to prevent current leakage in the aluminum alloy conductor 1. The cross-linked polyethylene material has excellent electrical insulation performance and heat aging resistance. It can maintain a stable insulation effect at high temperatures, effectively avoid current leakage, and ensure the safe operation of the cable.

[0029] The thickness of the insulating layer 2 is 3.5 mm to 5 mm. By precisely controlling the thickness of the insulating layer 2, the cable is ensured to have good insulation performance, while avoiding the problem of increasing the weight of the cable due to the insulating layer 2 being too thick, thereby improving the installation convenience and safety of the cable.

[0030] A shielding layer 4 is provided between the insulating layer 2 and the aluminum alloy conductor 1. The shielding layer 4 is made of metallized polyester film material, which can effectively reduce electromagnetic interference, improve the electrical stability of the cable, and enhance the weather resistance of the cable, ensuring that the cable can operate safely and reliably in complex environments.

[0031] A moisture-proof sealing layer 8 is provided between the aluminum alloy conductor 1 and the insulating layer 2, and the moisture-proof sealing layer 8 is located outside the shielding layer 4. The moisture-proof sealing layer 8 is made of silicone rubber material, and a layer of silicone rubber material is evenly coated on the outer surface of the aluminum alloy conductor 1 as the moisture-proof sealing layer 8; then, the silicone rubber material is formed into a dense sealing structure through processes such as heating and curing to ensure that it has good waterproof performance and can effectively isolate moisture in the external environment from entering the interior of the cable, thereby avoiding the problem of insulation performance degradation caused by moisture penetration.

[0032] Third embodiment

[0033] As attached Figure 1 and attached Figure 3 As shown: The armor layer 3 is arranged outside the insulating layer 2 and is formed by spirally winding a double layer of galvanized steel strips. It is used to protect the insulating layer 2 and provide additional mechanical protection for the cable to prevent external physical damage. The armor layer 3 is formed by spirally winding a double layer of galvanized steel strips. There is at least 50% overlap between two adjacent turns of steel strips, ensuring that the armor layer has sufficient mechanical strength and tensile strength.

[0034] The flame retardant layer 5 is filled between the double-layer galvanized steel strips of the armor layer 3. The use of an intumescent flame retardant can not only effectively suppress the spread of flames, thereby significantly improving the fire resistance of the cable, but also has certain waterproof properties, which further enhances the protection ability of the cable under harsh environmental conditions.

[0035] A sheath layer 6 is also provided on the outside of the armor layer 3. The sheath layer 6 is made of polyvinyl chloride material. During the production process, the pretreated aluminum alloy conductor 1 is first inserted into the pre-prepared armor layer 3, and then the molten PVC material is evenly wrapped on the outer surface of the armor layer 3 through an extruder to form a dense sheath layer 6, which not only gives the cable good wear resistance, but also enhances its corrosion resistance, thereby effectively protecting the armor layer 3 from external wear and chemical erosion, significantly improving the overall service life of the cable.

[0036] The surface of the double-layer galvanized steel strip of the armor layer 3 is coated with an anti-corrosion coating 7 to prevent the double-layer galvanized steel strip from rusting. A layer of anti-corrosion coating 7 composed of polymer materials such as epoxy resin and polyurethane is evenly coated on the steel strip. It can not only isolate moisture and oxygen in the air and prevent the steel strip from oxidizing and rusting, but also resist the erosion of corrosive substances such as salt spray. The corrosion resistance of the armor layer 3 is significantly improved, thereby ensuring that the cable can maintain good electrical performance and mechanical strength even in a humid or salty environment, thereby extending the service life of the cable.

[0037] A buffer layer 9 is provided between the armor layer 3 and the insulating layer 2. The buffer layer 9 is made of high-density polyethylene material. During the manufacturing process, a layer of high-density polyethylene material is evenly coated on the outer surface of the insulating layer 2, and then melted by heating and tightly adhered to the insulating layer 2 to form a buffer layer 9. It can effectively absorb the impact force applied to the cable from the outside and reduce the pressure of the armor layer 3 on the insulating layer 2, thereby significantly improving the impact resistance of the cable and ensuring that the internal structure of the cable will not be damaged when it is hit by external force.

[0038] Working principle: First, the aluminum alloy conductor 1 is the core part of current transmission. The structural design of multiple strands of twisted aluminum alloy wires not only improves the overall flexibility of the cable, but also effectively reduces the influence of the skin effect, thereby ensuring good conductivity and mechanical strength under different temperature and environmental conditions. Secondly, the insulating layer 2 is tightly wrapped around the outside of the aluminum alloy conductor 1 and is made of cross-linked polyethylene material. This material has excellent electrical insulation properties and heat-resistant aging properties. It can maintain a stable insulation effect even in high temperature environments, effectively avoid current leakage, and provide important guarantees for the safe operation of the cable. Finally, the armor layer 3 is arranged on the outside of the insulating layer 2. It is spirally wound with a double layer of galvanized steel strips. There is at least 50% overlap between the two adjacent circles of steel strips. This design ensures that the armor layer 3 has sufficient mechanical strength and tensile strength, can effectively resist external physical damage, and protect the internal aluminum alloy conductor 1 and insulation layer 2 from damage.

Claims

1. An armored aluminum alloy power cable, characterized in that: include: An aluminum alloy conductor (1) is formed by twisting aluminum alloy wires and is used for transmitting current; An insulating layer (2), tightly wrapped around the outside of the aluminum alloy conductor (1), is made of cross-linked polyethylene material and is used to prevent current leakage from the aluminum alloy conductor (1); The armor layer (3) is arranged outside the insulating layer (2) and is formed by spirally winding a double layer of galvanized steel strips, and is used to protect the insulating layer (2).

2. The armored aluminum alloy power cable according to claim 1, characterized in that: A shielding layer (4) is provided between the insulating layer (2) and the aluminum alloy conductor (1), and the shielding layer (4) is made of a metallized polyester film material.

3. The armored aluminum alloy power cable according to claim 1, characterized in that: A flame retardant layer (5) is filled between the double-layer galvanized steel strips of the armor layer (3).

4. The armored aluminum alloy power cable according to claim 1, characterized in that: A sheath layer (6) is further provided on the outside of the armor layer (3), and the sheath layer (6) is made of polyvinyl chloride material.

5. The armored aluminum alloy power cable according to claim 1, characterized in that: The surface of the double-layer galvanized steel strip of the armor layer (3) is coated with an anti-corrosion coating (7) to prevent the double-layer galvanized steel strip from rusting.

6. The armored aluminum alloy power cable according to claim 1, characterized in that: A moisture-proof sealing layer (8) is provided between the aluminum alloy conductor (1) and the insulating layer (2), and the moisture-proof sealing layer (8) is located outside the shielding layer (4). The moisture-proof sealing layer (8) is made of silicone rubber material.

7. The armored aluminum alloy power cable according to claim 1, characterized in that: A buffer layer (9) is provided between the armor layer (3) and the insulation layer (2), and the buffer layer (9) is made of high-density polyethylene material.

8. The armored aluminum alloy power cable according to claim 1, characterized in that: The thickness of the insulating layer (2) is 3.5 mm to 5 mm.

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