An aerial insulated conductor wire with improved breaking force

Abstract

The utility model belongs to power transmission technical field provides an overhead insulated conductor that promotes the force of pulling apart, include: steel core layer, steel core layer is located in the wire center position, steel core layer is used to bear axial tension, steel core layer outside is provided with inner lining layer, a plurality of isolation layers are provided in inner lining layer, the electric core is provided in isolation layer inside, the electric core is used for transmission power, the electric core outside is wrapped with insulating layer, the inner lining layer inside is provided with the filling layer, the inner lining layer outside is wrapped with steel wire layer, the utility model discloses through steel core layer adds steel wire layer and carbon fiber reinforced layer three -level enhancement system, has constructed the efficient mechanical bearing path, has promoted the overall pulling apart force and the fatigue resistance of wire greatly, the central steel core layer adopts two high -strength copper alloy line spiral winding and is formed, not only has the tensile strength that far exceeds ordinary aluminium material, still because copper alloy excellent ductility and fatigue resistance characteristic, can effectively absorb and disperse dynamic stress.

Description

Technical Field

[0001] This utility model belongs to the field of power transmission technology, specifically relating to an overhead insulated conductor with improved breaking strength. Background Technology

[0002] As a key link at the end of the power system, the safe and stable operation of medium and low voltage distribution networks directly affects the electricity consumption of residents, industry and commerce, and the overall efficiency of society. In recent years, overhead insulated conductors have been widely used in urban distribution networks, forest areas, densely populated areas, tourist attractions, and coastal areas with high salt spray due to their good electrical insulation performance, smaller line corridor occupation, lower failure rate, and strong resistance to pollution and lightning strikes. Compared with traditional bare conductors, overhead insulated conductors effectively reduce instantaneous faults caused by trees touching the wires, short circuits caused by small animals, and foreign objects bridging the wires, significantly improving the reliability of power supply.

[0003] However, in practical engineering applications, especially in long-span crossings (such as rivers, valleys, and highways), heavy icing areas (such as the cold regions of Northeast and Northwest China), strong wind areas (such as coastal typhoon belts), and long-distance transmission lines, conductors need to withstand large static tensions and dynamic loads (such as wind vibration, galloping, and increased weight due to icing) for extended periods. Traditional overhead insulated conductors, which use aluminum or aluminum alloys as the main conductive and load-bearing materials, generally have low tensile strength. Under extreme weather conditions, they are prone to serious accidents such as excessive sag, conductor breakage, tower tilting, and even collapse, which seriously threaten the safety of the power grid. Utility Model Content

[0004] The purpose of this invention is to provide an overhead insulated conductor with improved breaking strength to solve the problems mentioned in the background art.

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

[0006] An overhead insulated conductor with improved breaking strength includes:

[0007] A steel core layer is located at the center of the conductor and is used to withstand axial tensile force. An inner liner layer is provided on the outside of the steel core layer. Several isolation layers are provided inside the inner liner layer. A battery cell is provided inside the isolation layer and is used to transmit power. An insulation layer is wrapped around the battery cell. A filling layer is provided inside the inner liner layer. A steel wire layer is wrapped around the outer side of the inner liner layer. Several reinforcing layers are provided outside the steel wire layer. The reinforcing layers have a cylindrical structure and are evenly distributed along the axial direction of the conductor. An reinforcement layer is provided outside the reinforcement layer. An outer sheath is wrapped around the reinforcement layer.

[0008] Preferably, the steel core layer is composed of two high-strength copper alloy wires spirally wound together, and the filling layer is composed of hemp rope to fill the structural pores.

[0009] Preferably, the steel wire layer is formed by spirally twisting multiple galvanized steel wires, and the reinforcing layer is formed by cross-linking high-strength carbon fiber filaments to create a mesh structure.

[0010] Preferably, the inner liner is made of low-density polyethylene, the battery cell is made of multiple strands of aluminum alloy wire, and the insulation layer is cross-linked polyethylene.

[0011] Preferably, the steel wire layer is used to resist the axial tensile force of the conductor.

[0012] Preferably, the reinforcing layer is a stainless steel ring.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) This utility model constructs an efficient mechanical bearing path through a three-level reinforcement system of steel core layer, steel wire layer and carbon fiber reinforcement layer, which greatly improves the overall tensile strength and fatigue resistance of the conductor. The central steel core layer is made of two high-strength copper alloy wires spirally wound together. It not only has a tensile strength far exceeding that of ordinary aluminum, but also can effectively absorb and disperse dynamic stress due to the excellent ductility and fatigue resistance of copper alloy, thus avoiding early fracture caused by stress concentration. The outer steel wire layer further enhances the radial compressive and axial tensile strength, forming a second mechanical barrier. At the same time, the reinforcement layer formed by high-strength carbon fiber wire with ±45° cross braiding process gives the conductor excellent tensile, torsional and impact resistance.

[0015] (2) This utility model introduces a multi-level buffer structure with an inner lining layer, an isolation layer, and a filling layer, which effectively solves the problem of internal stress concentration caused by excessive structural rigidity during the stress process of traditional conductors. The inner lining layer is made of flexible polymer material, which can form an elastic transition between the steel core and the battery core, reducing rigidity transmission. The isolation layer separates multiple battery cores to prevent electromagnetic coupling and local overheating. The filling layer is made of natural hemp rope, which not only fills the structural gaps and enhances the overall density, but also has certain moisture absorption, buffering and water blocking functions, improving the operating stability of the conductor in a humid environment. This multi-level buffer design allows the stress of the conductor to be distributed step by step when it is subjected to tension, bending or vibration, avoiding local overload and significantly extending the fatigue life of the conductor. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the steel core layer of this utility model.

[0018] In the diagram: 1. Steel core layer; 2. Inner liner layer; 3. Insulation layer; 4. Battery cell; 5. Insulation layer; 6. Filler layer; 7. Steel wire layer; 8. Reinforcing layer; 9. Strengthening layer; 10. Outer sheath. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1:

[0021] Please see Figure 1 - Figure 2 As shown, an overhead insulated conductor with improved breaking strength includes:

[0022] The steel core layer 1 is located at the center of the conductor and is used to withstand axial tensile force. An inner liner layer 2 is provided on the outside of the steel core layer 1. Several isolation layers 3 are provided inside the inner liner layer 2. The battery cell 4 is provided inside the isolation layer 3 and is used to transmit power. An insulation layer 5 is wrapped around the outside of the battery cell 4. A filling layer 6 is provided inside the inner liner layer 2. A steel wire layer 7 is wrapped around the outside of the inner liner layer 2. Several reinforcing layers 8 are provided outside the steel wire layer 7. The reinforcing layers 8 have a cylindrical structure and are evenly distributed along the conductor axis. An reinforcement layer 9 is provided outside the reinforcement layer 8. An outer sheath layer 10 is wrapped around the reinforcement layer 9.

[0023] Specifically, the steel core layer 1 is composed of two high-strength copper alloy wires spirally wound together, the filling layer 6 is made of hemp rope and is used to fill the structural pores, the steel wire layer 7 is composed of multiple galvanized steel wires spirally twisted together, the reinforcing layer 9 is made of high-strength carbon fiber filaments forming a mesh structure, the inner liner layer 2 is made of low-density polyethylene material, the battery core 4 is composed of multiple strands of aluminum alloy wires twisted together, the insulation layer 5 is cross-linked polyethylene, the steel wire layer 7 is used to resist the axial tensile force of the conductor, and the reinforcing layer 8 is a stainless steel ring.

[0024] As shown above, the steel core layer 1 is located at the very center of the conductor and is composed of two chromium-zirconium-copper alloy wires twisted in a spiral manner. This layer serves as the main load-bearing structure of the conductor, bearing most of the axial tensile force during erection and operation, effectively preventing the conductor from breaking under long span or icing conditions. Simultaneously, its good ductility can absorb dynamic loads such as wind vibration and galloping, improving fatigue resistance. The inner liner layer 2 is extruded from low-density polyethylene material. This layer is soft and has good elasticity and buffering properties, forming a stress transition zone between the steel core layer 1 and the external rigid structure, preventing damage to the internal battery cell 4 due to rigidity transmission, and providing a uniform support base for subsequent structures. The isolation layer 3 is formed by wrapping heat-resistant polyester tape, isolating the battery cell 4 and playing a structural shaping role, ensuring the battery cell 4 remains stable under stress and does not shift or suffer frictional damage. The inner liner layer 2 is filled with water-resistant natural hemp rope, which has good moisture absorption, compression resilience, and damping properties. The steel wire layer 7 not only fills structural gaps and enhances overall density, but also absorbs energy during conductor vibration, reducing fatigue damage to the internal structure caused by wind vibration. The steel wire layer 8 significantly improves the radial compressive strength and axial tensile strength of the conductor, especially preventing internal structural deformation under icing or external pressure. The reinforcing layer 8 is a cylindrical structure fitted over the steel wire layer 7, providing concentrated reinforcement and effectively suppressing indentation and deformation of the conductor in local areas such as suspension points and tension sections, extending the contact life of hardware. The reinforcing layer 9 uses high-strength carbon fiber filaments to form a mesh reinforcement structure with a ±45° cross-weaving process, providing extremely high specific strength and tensile stiffness, significantly improving the overall breaking force, and effectively suppressing wind-induced vibration and galloping. The outer sheath 10 uses a 3.0mm thick flame-retardant polyurethane (TPU) sheath, which has excellent wear resistance and UV aging resistance. This sheath is directly exposed to the external environment, resisting sunlight, rain, snow, chemical corrosion, and external scratches, ensuring the long-term safe operation of the conductor.

[0025] Working principle: Under the action of erection tension, the tension is first borne by the steel core layer 1, whose high-strength copper alloy wire transmits the stress along the axis. The inner liner layer 2 and the filling layer 6 absorb part of the stress fluctuations and prevent the battery core 4 from being damaged by shear. The steel wire layer 7 and the reinforcing layer 8 provide radial restraint to prevent the structure from being crushed. The reinforcing layer 9 acts as an external "armor" to resist tension and torsion and suppress vibration. The outer protective layer 10 isolates external environmental interference and ensures the stability of the internal structure.

[0026] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An overhead insulated conductor with improved breaking strength, characterized in that, include: A steel core layer (1) is located at the center of the conductor. The steel core layer (1) is used to withstand axial tensile force. An inner lining layer (2) is provided on the outside of the steel core layer (1). Several isolation layers (3) are provided inside the inner lining layer (2). A battery cell (4) is provided inside the isolation layer (3). The battery cell (4) is used to transmit power. An insulation layer (5) is wrapped on the outside of the battery cell (4). A filling layer (6) is provided inside the inner lining layer (2). A steel wire layer (7) is wrapped on the outside of the inner lining layer (2). Several reinforcing layers (8) are provided on the outside of the steel wire layer (7). The reinforcing layers (8) are cylindrical in structure. The reinforcing layers (8) are evenly distributed along the axial direction of the conductor. An reinforcement layer (9) is provided on the outside of the reinforcement layer (8). An outer sheath (10) is wrapped on the outside of the reinforcement layer (9).

2. The overhead insulated conductor with improved breaking strength according to claim 1, characterized in that, The steel core layer (1) is composed of two high-strength copper alloy wires spirally wound together, and the filling layer (6) is composed of hemp rope and is used to fill the structural pores.

3. The overhead insulated conductor with improved breaking strength according to claim 2, characterized in that, The steel wire layer (7) is made of multiple galvanized steel wires spirally twisted together, and the reinforcing layer (9) is made of high-strength carbon fiber filaments interwoven to form a mesh structure.

4. The overhead insulated conductor with improved breaking strength according to claim 1, characterized in that, The inner liner (2) is made of low-density polyethylene, the battery cell (4) is made of multiple strands of aluminum alloy wire, and the insulation layer (5) is cross-linked polyethylene.

5. An overhead insulated conductor with improved breaking strength according to claim 3, characterized in that, The steel wire layer (7) is used to resist the axial tension of the conductor.

6. An overhead insulated conductor with improved breaking strength according to claim 1, characterized in that, The reinforcing layer (8) is a stainless steel ring.

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