An aerial insulated conductor with a reinforced tensile structure
By employing a multi-layered nested structure of aluminum and galvanized copper conductors combined with aramid and glass fiber reinforcing ribs in overhead insulated conductors, the problems of corrosion and hysteresis loss of traditional conductors in humid environments are solved, achieving high tensile strength, low loss, and high reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUBEI HENGTAI WIRE & CABLE
- Filing Date
- 2025-09-30
- Publication Date
- 2026-08-04
AI Technical Summary
The steel core of traditional overhead insulated conductors is prone to corrosion in humid and acid rain environments, which leads to a decrease in mechanical strength. In addition, the steel core material increases hysteresis loss, making it difficult to meet the requirements of modern power grids for lightweight, low loss and high reliability.
An aluminum conductor is externally fitted with an insulating separator and a galvanized copper conductor, combined with aramid fiber and glass fiber reinforcing ribs to form a multi-layered nested structure. This separates the mechanical tensile strength and electrical conduction functions, uses non-metallic materials to bear the main tensile force, and provides electrical isolation and physical protection through multiple insulation layers.
It significantly improves the tensile strength and fatigue resistance of the conductor, reduces its weight, lowers its resistance, increases its current carrying capacity and power supply reliability, and extends its service life, achieving the goals of lightweighting and low loss.
Smart Images
Figure CN224595282U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power transmission and distribution engineering technology, specifically to an overhead insulated conductor with a reinforced tensile structure. Background Technology
[0002] In the field of power transmission and distribution engineering, the mechanical strength of overhead insulated conductors is a core indicator for ensuring the safe operation of the power grid. Traditional reinforced tensile structures mainly employ a steel-cored aluminum stranded wire design, with the internal high-strength galvanized steel wire bearing the mechanical tensile force and the external aluminum wire providing conductivity. In actual operation, this type of structure is prone to corrosion of the steel core in harsh environments such as humidity and acid rain, leading to a decrease in overall mechanical strength. Simultaneously, the steel core, being a ferromagnetic material, generates additional hysteresis losses, increasing the energy consumption of the line operation. As power grid construction moves towards complex environments such as long crossings and heavy icing, the shortcomings of traditional steel-cored reinforced structures in terms of corrosion resistance, energy efficiency, and fatigue resistance are becoming increasingly apparent.
[0003] Existing reinforced tensile structures mostly use metal materials as the main load-bearing components. In addition to steel cores, there are also solutions using aluminum-clad steel cores, high-strength aluminum alloy wires, etc.
[0004] Because existing reinforced tensile structures all use metallic materials, while pursuing high mechanical strength, the conductors themselves have inherent defects such as heavy weight, susceptibility to corrosion, and additional losses. These structural limitations make it difficult for traditional conductors to meet the requirements of modern power grids for lightweight, low-loss, corrosion-resistant, and high-reliability conductors. Utility Model Content
[0005] The purpose of this invention is to provide an overhead insulated conductor with a reinforced tensile structure to solve the problems mentioned in the background art.
[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0007] An overhead insulated conductor with a reinforced tensile structure includes an aluminum conductor, an insulating separator sleeve is sleeved on the outside of the aluminum conductor, an insulating separator sleeve is fixedly connected to the outside of the insulating separator sleeve, and a galvanized copper conductor is provided on the outside of the insulating separator sleeve.
[0008] It also includes reinforcing ribs, fixing blocks, and outer protective layers for the conductors;
[0009] The reinforcing ribs are used to improve the tensile strength of the conductor;
[0010] The fixing block is used to fix the internal structure of the conductor;
[0011] The outer protective layer of the conductor is placed on the outside of the fixing block to prevent external environmental factors from affecting the conductor.
[0012] A further improvement of this utility model is that: the galvanized copper wire is spirally wound on the surface of the insulating separator sleeve, an inner insulating layer is sleeved on the outside of the galvanized copper wire, a reinforcing layer is provided on the outside of the inner insulating layer, an inner protective layer is sleeved on the outside of the reinforcing layer, and the inner protective layer is distributed in a circumferential array.
[0013] A further improvement of this utility model is that the reinforcing layer is spirally wound on the surface of the inner insulating layer, and the reinforcing layer is made of aramid fiber.
[0014] A further improvement of this utility model is that a reinforcing rib is provided in the middle of the adjacent inner protective layer, the reinforcing rib is composed of multiple glass fiber ropes, and a binding sleeve is sleeved on the outside of the reinforcing rib.
[0015] A further improvement of this utility model is that: the fixing block is disposed outside the inner protective layer, a limiting groove is formed inside the fixing block, the limiting groove is distributed in a circular array, and the inner protective layer is engaged inside the limiting groove.
[0016] A further improvement of the present invention is that: the outer protective layer of the conductor includes an outer insulation layer, the outer insulation layer is sleeved on the outside of the fixing block, and an outer anti-wear layer is sleeved on the outside of the outer insulation layer. The outer insulation layer is made of cross-linked polyethylene, and the outer anti-wear layer is made of polyvinyl chloride.
[0017] The beneficial effects of this utility model are as follows:
[0018] 1. This utility model provides an overhead insulated conductor with a reinforced tensile structure, which uses a non-metallic aramid fiber reinforcing layer and a glass fiber inner protective layer to jointly bear the load. Through this mechanism, the mechanical tensile function and electrical conduction function of the conductor are separated, with the main tensile force borne by the extremely high-strength and extremely lightweight synthetic fiber. This allows the conductor to have tensile strength and fatigue resistance far exceeding that of traditional steel-cored aluminum stranded wires of the same diameter, while significantly reducing the self-weight of the conductor and the load on the tower.
[0019] 2. This utility model provides an overhead insulated conductor with a reinforced tensile strength structure, employing a composite conductive design of an aluminum core and a spirally wound galvanized copper conductor. Through this mechanism, the inner aluminum conductor undertakes the main conductive function, while the outer copper conductor both shunts the current to reduce resistance and provides a current path in the event of an accidental breakage of the aluminum core, forming redundancy and significantly improving the conductor's current-carrying capacity and power supply reliability, effectively preventing overall line interruption due to a single-point breakage.
[0020] 3. This utility model provides an overhead insulated conductor with a reinforced tensile structure. Through a multi-layered nested protective design, an inner insulation layer, an outer insulation layer, and an outer abrasion-resistant layer are respectively set from the inside out. This mechanism achieves multiple electrical isolation and physical protection for the internal conductor. The cross-linked polyethylene main insulation layer ensures excellent insulation performance and weather resistance, while the outermost polyvinyl chloride sheath provides superior abrasion resistance, UV protection, and anti-aging protection, greatly extending the service life of the conductor in harsh outdoor environments. Attached Figure Description
[0021] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a three-dimensional structural diagram of the overhead insulated conductor with reinforced tensile structure according to this utility model;
[0023] Figure 2 This is a front view of the present invention;
[0024] Figure 3 This is a schematic diagram of the internal structure of the fixing block of this utility model;
[0025] Figure 4 This is a schematic diagram of the internal insulating layer of this utility model;
[0026] Figure 5 This is a schematic diagram of the structure of the fixing block and the limiting groove of this utility model.
[0027] In the diagram: 4. Outer protective layer of the conductor;
[0028] 11. Aluminum conductor; 12. Insulating separator sleeve; 13. Galvanized copper conductor; 14. Inner insulation layer; 15. Reinforcing layer; 16. Inner protective layer;
[0029] 21. Reinforcing ribs; 22. Binding sleeves;
[0030] 31. Fixing block; 32. Limiting groove;
[0031] 41. External insulation layer; 42. External abrasion-resistant layer. Detailed Implementation
[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0033] like Figure 1-5 As shown, this utility model has the following three specific embodiments.
[0034] Example 1
[0035] This utility model provides an overhead insulated conductor with a reinforced tensile structure, including an aluminum conductor (11), an insulating separator 12 is sleeved on the outside of the aluminum conductor 11, an insulating separator 12 is fixedly connected to the outside of the insulating separator 12, and a galvanized copper conductor 13 is provided on the outside of the insulating separator 12.
[0036] It also includes reinforcing ribs 21, fixing blocks 31, and outer protective layers for the conductors 4;
[0037] Reinforcing rib 21 is used to improve the tensile strength of the conductor;
[0038] The fixing block 31 is used to fix the internal structure of the conductor;
[0039] The outer protective layer 4 of the conductor is installed on the outside of the fixing block 31 to prevent the influence of external environmental factors on the conductor.
[0040] In this embodiment, as Figure 1 As shown, aluminum conductor 11 is responsible for carrying and transmitting current, while galvanized copper conductor 13 is spirally wound around the core. This not only diverts current and improves reliability but also provides mechanical protection for the internal aluminum core. Reinforcing ribs 21 act as the conductor's "skeleton system," bearing the mechanical tension of the conductor and ensuring it will not break due to its own weight or wind. Fixing blocks 31 integrate the dispersed load-bearing components, preventing the internal structure of the conductor from becoming loose or shifting relative to each other. Finally, the outer protective layer 4 provides electrical insulation, weather resistance, and wear resistance to the conductor, ensuring its long-term stable and safe operation.
[0041] Example 2
[0042] The difference from Example 1 is that this example discloses a galvanized copper wire 13.
[0043] Preferably, the galvanized copper wire 13 is spirally wound on the surface of the insulating separator sleeve 12, and an inner insulating layer 14 is sleeved on the outside of the galvanized copper wire 13. A reinforcing layer 15 is provided on the outside of the inner insulating layer 14, and an inner protective layer 16 is sleeved on the outside of the reinforcing layer 15. The inner protective layer 16 is distributed in a circumferential array.
[0044] In this embodiment, as Figure 3 and 4 As shown, due to the low cost and light weight of the aluminum conductor 11, it can be set as the main channel for current transmission. By spirally winding a galvanized copper conductor 13 around the outer layer, some of the current can be shared, reducing the overall resistance. Furthermore, even if the inner aluminum conductor breaks, the current can still continue to be transmitted through the outer copper conductor, improving the reliability of the circuit. By wrapping the aluminum conductor 11 with an insulating sleeve 12, electrical isolation between the aluminum core and the copper wire is ensured, preventing mutual interference.
[0045] Example 3
[0046] The difference from Embodiment 2 is that this embodiment discloses a reinforcing rib 21, a fixing block 31, and an outer protective layer 4 for the conductor.
[0047] Preferably, the reinforcing layer 15 is spirally wound on the surface of the inner insulating layer 14, and the reinforcing layer 15 is made of aramid fiber.
[0048] A reinforcing rib 21 is provided in the middle of the adjacent inner protective layer 16. The reinforcing rib 21 is composed of multiple glass fiber ropes, and a binding sleeve 22 is sleeved on the outside of the reinforcing rib 21.
[0049] The fixing block 31 is set outside the inner protective layer 16. The fixing block 31 has a limiting groove 32 inside, which is distributed in a circular array. The inner protective layer 16 is snapped into the inside of the limiting groove 32.
[0050] The outer protective layer 4 of the conductor includes an outer insulation layer 41, which is sleeved on the outside of the fixing block 31. An outer anti-wear layer 42 is sleeved on the outside of the outer insulation layer 41. The outer insulation layer 41 is made of cross-linked polyethylene, and the outer anti-wear layer 42 is made of polyvinyl chloride.
[0051] In this embodiment, as Figure 2-5 As shown, by providing a reinforcing layer 15 outside the inner insulation layer 14, and by spirally winding aramid fibers around its exterior to directly bear part of the tensile load, the tensile strength of the conductor is enhanced while maintaining its flexibility. Furthermore, by providing reinforcing ribs 21 and binding with binding sleeves 22, a robust cylindrical support structure is formed. This structure not only enhances the tensile strength of the conductor but also prevents it from being flattened when bent, maintaining its circular cross-section.
[0052] The working principle of this utility model is as follows.
[0053] First, the aluminum conductor is set as the main channel for current transmission. Then, by spirally winding a galvanized copper conductor 13 around the outer layer, part of the current is shared, reducing the overall resistance. Furthermore, even if the inner aluminum conductor breaks, the current can still continue to be transmitted through the outer copper conductor, improving the reliability of the circuit. By wrapping the aluminum conductor 11 with an insulating separator 12, electrical isolation between the aluminum core and the copper wire is ensured, preventing mutual interference. A reinforcing layer 15 is set outside the inner insulation layer 14, with aramid fiber spirally wound around it to directly bear part of the tensile load, thereby enhancing the tensile strength of the conductor while maintaining its flexibility. Additionally, by setting reinforcing ribs 21 and binding with binding sleeves 22, a robust cylindrical support structure is formed. This structure not only improves the tensile strength of the conductor but also prevents it from being flattened when bent, maintaining its circular cross-section.
[0054] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. The selection and detailed description of these embodiments in this specification are intended to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it.
Claims
1. An overhead insulated conductor with a reinforced tensile structure, comprising an aluminum conductor (11), characterized in that: An insulating separator sleeve (12) is sleeved on the outside of the aluminum conductor (11), and an insulating separator sleeve (12) is fixedly connected to the outside of the insulating separator sleeve (12). A galvanized copper conductor (13) is provided on the outside of the insulating separator sleeve (12). It also includes reinforcing ribs (21), fixing blocks (31) and outer protective layer for conductors (4); The reinforcing rib (21) is used to improve the tensile strength of the conductor; The fixing block (31) is used to fix the internal structure of the conductor; The outer protective layer (4) of the conductor is set outside the fixing block (31) to prevent external environmental factors from affecting the conductor.
2. The overhead insulated conductor with a reinforced tensile structure according to claim 1, characterized in that: The galvanized copper wire (13) is spirally wound on the surface of the insulating separator sleeve (12). An inner insulation layer (14) is sleeved on the outside of the galvanized copper wire (13). A reinforcing layer (15) is provided on the outside of the inner insulation layer (14). An inner protective layer (16) is sleeved on the outside of the reinforcing layer (15). The inner protective layer (16) is distributed in a circumferential array.
3. The overhead insulated conductor with a reinforced tensile structure according to claim 2, characterized in that: The reinforcing layer (15) is spirally wound on the surface of the inner insulating layer (14), and the reinforcing layer (15) is made of aramid fiber.
4. The overhead insulated conductor with a reinforced tensile structure according to claim 2, characterized in that: A reinforcing rib (21) is provided in the middle of the adjacent inner protective layer (16). The reinforcing rib (21) is composed of multiple glass fiber ropes, and a binding sleeve (22) is sleeved on the outside of the reinforcing rib (21).
5. The overhead insulated conductor with a reinforced tensile structure according to claim 2, characterized in that: The fixing block (31) is located outside the inner protective layer (16). A limiting groove (32) is opened inside the fixing block (31). The limiting groove (32) is distributed in a circular array. The inner protective layer (16) is snapped into the inside of the limiting groove (32).
6. The overhead insulated conductor with a reinforced tensile structure according to claim 5, characterized in that: The outer protective layer (4) of the conductor includes an outer insulation layer (41), which is sleeved on the outside of the fixing block (31). An outer anti-wear layer (42) is sleeved on the outside of the outer insulation layer (41). The outer insulation layer (41) is made of cross-linked polyethylene, and the outer anti-wear layer (42) is made of polyvinyl chloride.