FRP composite core overhead conductor structure with high tensile strength

Abstract

This utility model discloses a high-tensile-strength FRP composite core overhead conductor structure, relating to the field of overhead conductor technology. The utility model includes an FRP composite core and a conductive layer disposed on the outside of the FRP composite core. Using the FRP composite core as the core support, the central carbon fiber filaments inside possess high strength characteristics and can effectively withstand tensile forces. The combination of the outer glass fiber layer and high-strength resin further enhances the overall strength and stability. In harsh environments such as long spans, heavy icing areas, and when the conductor heats up and expands due to high current transmission, it can prevent conductor breakage, ensuring power transmission safety. Furthermore, the metal shielding layer can shield electromagnetic interference, reduce energy loss, and ensure stable current transmission. The weather-resistant layer and outer sheath enhance the conductor's resistance to natural corrosion and mechanical protection. This conductor, while meeting high tensile strength requirements, improves overall performance, ensuring safe and efficient operation under complex environments and high-load power transmission conditions.

Description

Technical Field

[0001] This utility model relates to the field of overhead conductor technology, specifically to an FRP composite core overhead conductor structure with high tensile strength. Background Technology

[0002] Overhead transmission conductors, as the carriers of power transmission, occupy an extremely important position in transmission lines. Since the commissioning of transmission lines, the main type of overhead transmission conductors has been steel-cored aluminum stranded wire. With the development of new material technology, new composite materials such as carbon fiber are used to replace the steel core in traditional conductors, forming a brand-new type of overhead transmission line conductor. Its outstanding features are light weight, tensile strength, good thermal stability, small sag, strong current carrying capacity per unit area, and corrosion resistance. It has good application prospects in county-level power grid transmission lines.

[0003] With the continuous development of the power industry, the performance requirements for overhead conductors are increasing. Among the many performance indicators, tensile strength is one of the key factors in measuring the reliability and service life of conductors. Traditional overhead conductors have certain limitations in terms of tensile strength, making it difficult to meet the needs of some special environments and high-load power transmission. For example, under harsh conditions such as long crossings and heavy icing areas, conductors need to withstand huge tensile forces, and ordinary conductors are prone to breakage and other safety hazards. At the same time, with the continuous increase in grid capacity, conductors need to have higher current carrying capacity, which also puts forward higher requirements for conductor strength. This is because when transmitting large currents, conductors will heat up and expand. If the strength is insufficient, it will lead to excessive sag, affecting power transmission safety. Utility Model Content

[0004] The purpose of this utility model is to provide an FRP composite core overhead conductor structure with high tensile strength in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model employs the following technical solution: a high-tensile-strength FRP composite core overhead conductor structure, comprising: an FRP composite core and a conductive layer disposed on the outside of the FRP composite core; the FRP composite core is formed by stranding multiple FRP fiber bundles, each FRP fiber bundle including a central carbon fiber filament and a glass fiber layer wrapped around the central carbon fiber filament, with high-strength resin filling the space between the glass fiber layer and the central carbon fiber filament; the conductive layer is formed by spirally winding multiple aluminum strands around the outside of the FRP composite core, with adjacent aluminum strands tightly bonded together; a metal shielding layer is further disposed between the FRP composite core and the conductive layer, the metal shielding layer being formed by wrapping copper strip, a weather-resistant layer being disposed on the outer periphery of the conductive layer, and an outer sheath being disposed on the outer periphery of the weather-resistant layer.

[0006] Furthermore, the diameter of the central carbon fiber filament is 0.05-0.1 mm, and the thickness of the glass fiber layer is 0.05-0.15 mm.

[0007] Furthermore, an insulating layer is provided between the metal shielding layer and the conductive layer, and the insulating layer is made of polyethylene material.

[0008] Furthermore, the weather-resistant layer comprises an inner layer of cross-linked polyethylene, a middle layer of fluorinated ethylene propylene copolymer, and an outer layer of polyurethane / graphene composite material, the outer surface of which is provided with a periodically distributed pit structure.

[0009] Furthermore, a support frame made of carbon fiber composite material is provided between the weather-resistant layer and the outer sheath.

[0010] Furthermore, multiple anti-slip reinforced rubber sleeves are fixedly installed in an array on the outer periphery of the outer sheath.

[0011] Furthermore, multiple tensile steel wire ropes are provided in the gap between the conductive layer and the weather-resistant layer.

[0012] The beneficial effects of this utility model are as follows: This invention uses an FRP composite core as its core support. The central carbon fiber filament inside has high strength and can effectively withstand tensile forces. The combination of the outer glass fiber layer and high-strength resin further enhances the overall strength and stability. In harsh environments such as long crossings and heavy icing areas, as well as when the conductor heats up and expands due to high current transmission, it can prevent conductor breakage and ensure power transmission safety. The metal shielding layer can shield electromagnetic interference, reduce energy loss, and ensure stable current transmission. The weather-resistant layer and outer sheath enhance the conductor's resistance to natural corrosion and mechanical protection. This conductor meets the requirements for high tensile strength while improving its overall performance, ensuring safe and efficient operation in complex environments and under high-load power transmission conditions. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a utility model Figure 1 A frontal plan view of the structural structure; Figure 3 This is a utility model Figure 1 Three-dimensional structural diagram of the weather-resistant layer; Figure 4 This is a utility model Figure 3 A planar structural sectional view.

[0014] Reference numerals: 1. FRP composite core; 2. Conductive layer; 3. FRP fiber bundle; 31. Central carbon fiber filament; 32. Glass fiber layer; 33. High-strength resin; 5. Metal shielding layer; 6. Weather-resistant layer; 61. Cross-linked polyethylene; 62. Fluorinated ethylene propylene copolymer; 63. Polyurethane / graphene composite material; 7. Outer sheath; 8. Support frame; 9. Anti-slip reinforced rubber sleeve; 10. Tensile steel wire rope. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0016] like Figure 1-4 As shown, an embodiment of the present invention provides a high tensile strength FRP composite core overhead conductor structure, comprising: an FRP composite core 1 and a conductive layer 2 disposed on the outside of the FRP composite core 1; The FRP composite core 1 is formed by twisting together multiple FRP fiber bundles 3. The FRP fiber bundle 3 includes a central carbon fiber filament 31 and a glass fiber layer 32 wrapped around the outside of the central carbon fiber filament 31. High-strength resin 33 is filled between the glass fiber layer 32 and the central carbon fiber filament 31. The conductive layer 2 is formed by spirally winding multiple aluminum strands around the outside of the FRP composite core 1, with adjacent aluminum strands tightly bonded together. A metal shielding layer 5 is also provided between the FRP composite core 1 and the conductive layer 2. The metal shielding layer 5 is made of copper strip wrapped around it. A weather-resistant layer 6 is provided on the outer periphery of the conductive layer 2, and an outer sheath 7 is provided on the outer periphery of the weather-resistant layer 6.

[0017] During power transmission, current is primarily transmitted through multiple aluminum stranded wires in the conductive layer 2. These aluminum stranded wires are spirally wound around the outside of the FRP composite core 1 and are tightly fitted together, effectively ensuring smooth current transmission and providing a certain current-carrying capacity. The FRP composite core 1, as the core support of the entire conductor, plays a crucial role. It is composed of multiple FRP fiber bundles 3 twisted together. The central carbon fiber filament 31 inside each FRP fiber bundle 3 has high strength characteristics and is a key component bearing tensile force. The glass fiber layer 32 wrapped around it provides protection and reinforcement. Simultaneously, the high-strength resin 33 filling the space between the glass fiber layer 32 and the central carbon fiber filament 31 not only tightly bonds the two together but also further improves the overall strength and stability of the fiber bundle. This allows the FRP composite core 1 to withstand enormous tensile force even under harsh conditions such as long spans, heavy icing areas, and when the conductor heats up and expands due to the transmission of large currents, preventing safety hazards such as conductor breakage and ensuring the reliability and service life of the conductor. Furthermore, the metal shielding layer 5 between the FRP composite core 1 and the conductive layer 2 is made of copper strip, which can effectively shield electromagnetic interference, ensure the stability of current transmission, and avoid adverse effects of external electromagnetic fields on the internal current transmission of the conductor. It also helps to reduce electromagnetic energy loss inside the conductor. The weather-resistant layer 6 on the outer periphery of the conductive layer 2 can resist the erosion of external natural environmental factors such as ultraviolet rays, wind and rain, and protect the internal structure of the conductor from damage. The outer sheath 7 on the outer periphery of the weather-resistant layer 6 further enhances the mechanical protection performance of the conductor, preventing the conductor from being damaged by external forces during installation and operation. Thus, it comprehensively ensures that the overhead conductor can work stably, safely and efficiently under various complex environments and high-load power transmission conditions, meeting the power industry's ever-increasing demands for the tensile strength and comprehensive performance of overhead conductors.

[0018] like Figure 2 As shown, in some embodiments, the diameter of the central carbon fiber filament 31 is 0.05-0.1 mm, and the thickness of the glass fiber layer 32 is 0.05-0.15 mm.

[0019] The central carbon fiber filament 31 has a diameter of 0.05-0.1 mm. Within this size range, the central carbon fiber filament 31 possesses high strength characteristics and is a key component bearing tensile force, providing strong tensile support for the entire conductor. The outer glass fiber layer 32 has a thickness of 0.05-0.15 mm. This thickness of glass fiber layer 32 not only provides a certain degree of protection, preventing the central carbon fiber filament 31 from external physical damage and environmental erosion, but also works in conjunction with the central carbon fiber filament 31 to enhance the overall performance of the entire fiber bundle.

[0020] like Figure 2As shown, in some embodiments, an insulating layer 4 is provided between the metal shielding layer 5 and the conductive layer 2, and the insulating layer 4 is made of polyethylene material.

[0021] Polyethylene has good insulation properties and chemical stability, which can effectively isolate the electrical contact between the metal shielding layer 5 and the conductive layer 2, prevent current leakage and short circuit, and ensure the safe operation of the conductor.

[0022] like Figure 4 As shown, in some embodiments, the weather-resistant layer 6 comprises an inner cross-linked polyethylene 61, a middle fluorinated ethylene-propylene copolymer 62, and an outer polyurethane / graphene composite material 63, the outer surface of which has a periodically distributed pit structure. The pit structure helps improve the heat dissipation performance of the conductor surface, preventing the conductor from overheating when transmitting large currents, thus affecting its performance and service life.

[0023] The weather-resistant layer 6, located on the outer periphery of the conductive layer 2, has a unique multi-layered structure. Its inner cross-linked polyethylene 61 possesses excellent heat resistance and mechanical strength, effectively resisting the effects of high-temperature environments on the internal structure of the conductor. It can also withstand certain mechanical stresses, protecting the conductive layer 2 and the FRP composite core 1 from damage. The middle layer, a fluorinated ethylene-propylene copolymer 62, exhibits good weather resistance and UV resistance, effectively resisting long-term UV exposure, preventing aging and performance degradation of the conductor surface material, and extending the conductor's service life. The outer polyurethane / graphene composite material 63 not only possesses excellent wear resistance and impact resistance, effectively resisting external physical damage, but also has good conductivity, further enhancing the electromagnetic shielding effect of the conductor.

[0024] like Figure 2 As shown, in some embodiments, a support frame 8, made of carbon fiber composite material, is provided between the weather-resistant layer 6 and the outer sheath 7.

[0025] Carbon fiber composites possess advantages such as high strength, low density, good corrosion resistance, and fatigue resistance. The support frame 8 provides additional mechanical support to the entire conductor structure, enhancing the overall rigidity and stability of the conductor and preventing deformation and damage caused by its own weight or external factors during long-term operation. Simultaneously, the lightweight nature of carbon fiber composites helps reduce the overall weight of the conductor, lessening the burden on transmission towers and other supporting structures, and improving the economy and reliability of transmission lines.

[0026] like Figure 2 As shown, in some embodiments, multiple anti-slip reinforced rubber sleeves 9 are fixedly installed in an array on the outer periphery of the outer sheath 7.

[0027] The anti-slip reinforced rubber sleeve 9 is used to increase the friction of the outer surface of the outer sheath 7, making it easier for workers to handle and preventing it from slipping off easily.

[0028] like Figure 2 As shown, in some embodiments, multiple tensile steel wire ropes 10 are provided in the gap between the conductive layer 2 and the weather-resistant layer 6.

[0029] The tensile steel wire rope 10 further enhances the tensile strength of the conductor. Under harsh conditions such as long spans and heavy icing areas, the conductor needs to withstand enormous tensile forces. The tensile steel wire rope 10 works in conjunction with the FRP composite core 1 to share these forces, effectively preventing the conductor from breaking or deforming due to excessive tension. Simultaneously, the installation of the tensile steel wire rope 10 also helps improve the overall stability and reliability of the conductor, ensuring that it maintains good mechanical and electrical properties under various complex working conditions.

[0030] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An FRP composite core overhead conductor structure having high tensile strength, characterized by, include: FRP composite core (1) and conductive layer (2) disposed on the outside of the FRP composite core (1); The FRP composite core (1) is formed by twisting together multiple FRP fiber bundles (3). The FRP fiber bundle (3) includes a central carbon fiber filament (31) and a glass fiber layer (32) wrapped around the outside of the central carbon fiber filament (31). High-strength resin (33) is filled between the glass fiber layer (32) and the central carbon fiber filament (31). The conductive layer (2) is formed by spirally winding multiple aluminum strands around the outside of the FRP composite core (1), with adjacent aluminum strands tightly bonded together. A metal shielding layer (5) is provided between the FRP composite core (1) and the conductive layer (2). The metal shielding layer (5) is made of copper strip. A weather-resistant layer (6) is provided on the outer periphery of the conductive layer (2). An outer sheath (7) is provided on the outer periphery of the weather-resistant layer (6).

2. The FRP composite core overhead conductor structure having high tensile strength according to claim 1, characterized by, The diameter of the central carbon fiber filament (31) is 0.05-0.1 mm, and the thickness of the glass fiber layer (32) is 0.05-0.15 mm.

3. The FRP composite core overhead conductor structure of claim 1, wherein An insulating layer (4) is provided between the metal shielding layer (5) and the conductive layer (2), and the insulating layer (4) is made of polyethylene material.

4. The FRP composite core overhead conductor structure of claim 1, wherein The weather-resistant layer (6) includes an inner layer of cross-linked polyethylene (61), a middle layer of fluorinated ethylene propylene copolymer (62), and an outer layer of polyurethane / graphene composite material (63), the outer surface of which is provided with a periodically distributed pit structure.

5. The FRP composite core overhead conductor structure of claim 1, wherein A support frame (8) made of carbon fiber composite material is provided between the weather-resistant layer (6) and the outer sheath (7).

6. The FRP composite core overhead conductor structure of claim 1, wherein The outer sheath (7) has multiple anti-slip reinforced rubber sleeves (9) fixedly installed in an array on its outer periphery.

7. The FRP composite core overhead conductor structure of claim 1, wherein Multiple tensile steel wire ropes (10) are provided in the gap between the conductive layer (2) and the weather-resistant layer (6).

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