Bend-resistant aerial insulated conductor
Patent Information
- Application Number
- CN202522560906.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-02
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-12-02
AI Technical Summary
[0002]现有架空绝缘导线在长期户外应用中存在局限，传统导线的绝缘层多为光滑一体结构，缺乏温度形变补偿设计，环境温度波动时易因热胀冷缩产生内部应力，导致绝缘层开裂或与缆芯剥离；弯折操作时，外层防护层多为一体化，易出现局部破裂，破坏整体绝缘性
1.本实用新型通过设置改性热塑性塑料保护层与柔性硅酮密封涂层，配合保护层表面的折弯槽设计，让保护层在弯折时可通过矩形网格单元位移适配形变，减少局部应力导致的破裂，兼顾抗冲击与耐候性，密封涂层则能填补缝隙，阻挡雨水、灰尘等杂质渗入，保护内部绝缘层与补偿楔块功能不受损，有利于强化导线的外部防护能力与耐弯折性能。
Smart Images
Figure CN224907623U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power equipment technology, specifically to a bend-resistant overhead insulated conductor. Background Technology
[0002] Existing overhead insulated conductors have limitations in long-term outdoor applications. The insulation layer of traditional conductors is mostly a smooth, one-piece structure, lacking temperature deformation compensation design. When the ambient temperature fluctuates, internal stress is easily generated due to thermal expansion and contraction, leading to cracking of the insulation layer or separation from the cable core. During bending operations, the outer protective layer is mostly one-piece, which is prone to local cracking and damage to the overall insulation.
[0003] Therefore, this utility model provides a bend-resistant overhead insulated conductor. The compensating wedge made of elastic material can absorb temperature deformation stress, prevent the insulation layer from cracking, and at the same time form a heat dissipation channel to improve heat diffusion efficiency. The metal hollow protective mesh can support the internal structure and adapt to bending deformation to prevent the layer from collapsing. The modified thermoplastic protective layer, together with the bending groove, provides room for bending and reduces damage, thus meeting the bend resistance requirements of overhead insulated conductors. Utility Model Content
[0004] To address the shortcomings of existing technologies, the technical solution adopted by this utility model is as follows: a bend-resistant overhead insulated conductor, comprising: a cable core, an insulation layer, a compensating wedge, a protective mesh, and a protective layer arranged sequentially from the inside out. Several bending grooves are provided through the protective layer. The compensating wedges are evenly distributed between the insulation layer and the protective mesh. All components are coaxially assembled to form an integrated structure. In use, the innermost cable core serves as the core carrier for current transmission, directly undertaking the task of conducting electrical energy. The outer insulation layer covers the cable core, both blocking current leakage and avoiding the risk of leakage, and providing basic insulation protection for the conductor. It also lays the structural foundation for the subsequent assembly and function of each functional layer.
[0005] Preferably, the compensating wedge is made of an elastomer material with a rhomboid cross-section, and is evenly distributed along the circumference of the insulation layer. The height of the compensating wedge is adapted to the inner diameter of the protective mesh, and is used to fill the gap between the insulation layer and the protective mesh and compensate for temperature deformation. The compensating wedges are evenly distributed on the outer side of the insulation layer. These components are made of elastomer materials such as silicone rubber, which have good elastic recovery and weather resistance, and can adapt to the outdoor environment for a long time without aging or becoming brittle. When the ambient temperature changes and the conductor expands and contracts due to heat, the compensating wedge can absorb the deformation difference between the insulation layer and the outer protective mesh by its own elastic deformation. While filling the gap between the two, it also offsets the internal stress and prevents the layers from being damaged by compression or stretching. At the same time, the gap formed between the compensating wedge, the insulation layer, and the protective mesh can also form a natural heat dissipation channel. The heat generated when the cable core is working can be transferred to the gap through the insulation layer and then diffused outward with the help of external air flow, which helps to improve the overall heat dissipation effect of the conductor and helps to avoid local overheating affecting the performance.
[0006] Preferably, the protective mesh is a metal perforated mesh, which is embedded in and fits the outer wall of the compensation wedge. The protective mesh fitted to the outside of the compensation wedge is a metal perforated structure made of tin-plated copper. It has sufficient structural strength to effectively support the internal insulation layer and the compensation wedge, preventing the internal layers from collapsing or tearing when the conductor is bent. It also avoids the elastic deformation of the compensation wedge through its perforated characteristics, without hindering the temperature deformation compensation process, and does not block the heat dissipation channel, ensuring that the support and heat dissipation functions do not interfere with each other. The protective layer on the outside of the protective mesh is made of modified thermoplastic plastics such as modified high-density polyethylene. These materials, by adding weather-resistant components, can resist outdoor wind, rain, dust and ultraviolet erosion, and have both toughness and impact resistance, and are not easy to crack at low temperatures. The surface of the protective layer is divided into a rectangular grid structure by bending grooves. When the conductor is bent, the rectangular grid units can move slightly along the bending grooves, providing room for deformation, dispersing the local stress generated by bending, further preventing the protective layer from cracking, and ensuring the external protection effect.
[0007] Preferably, the surface of the protective layer is divided into a rectangular grid structure by bending grooves. The surface of the protective layer is sprayed with a sealing coating, and the surface of the protective layer is also sprayed with a flexible silicone resin sealing coating. This type of coating can tightly adhere to the surface of the protective layer, fill the tiny gaps in the rectangular grid, effectively prevent impurities such as rainwater, dust and corrosive gases from penetrating into the inside of the wire, prevent damage to the stability of the internal functional layer structure, and its flexible nature can expand and contract synchronously with the bending deformation of the protective layer without cracking due to deformation, maintain the sealing effect for a long time, and adapt to outdoor temperature fluctuations, making it less prone to falling off and failing.
[0008] The beneficial effects of this utility model are as follows: 1. This utility model, by setting a modified thermoplastic protective layer and a flexible silicone sealing coating, combined with the bending groove design on the surface of the protective layer, allows the protective layer to adapt to deformation through the displacement of rectangular grid units when bent, reducing cracks caused by local stress, and taking into account both impact resistance and weather resistance. The sealing coating can fill gaps, prevent rainwater, dust and other impurities from penetrating, protect the internal insulation layer and the function of the compensation wedge from damage, and help to strengthen the external protection capability and bending resistance of the conductor.
[0009] 1. This utility model, by setting up compensating wedges made of elastomeric material and a perforated metal protective mesh, not only utilizes the elastic deformation of the compensating wedges to absorb the stress caused by temperature changes, preventing the insulation layer from cracking or peeling due to thermal expansion and contraction, but also utilizes the gaps formed between the compensating wedges and each layer to create natural heat dissipation channels, accelerating heat dissipation from the cable core and preventing high temperatures from accelerating material aging; at the same time, the protective mesh provides stable support for the internal structure, preventing the layers from collapsing when bent, which is beneficial to improving the temperature adaptability, heat dissipation efficiency and structural stability of the conductor, and extending the outdoor service life. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of this utility model; Figure 3 This is a schematic diagram of the structure of the protective net of this utility model; Figure 4 This is a schematic diagram of the structure of the insulating layer of this utility model.
[0011] In the diagram: 1. Protective layer; 2. Bending groove; 3. Protective net; 4. Insulation layer; 5. Compensating wedge; 6. Cable core. Detailed Implementation
[0012] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose. Example:
[0013] Please see Figure 1 - Figure 4This utility model provides a technical solution: a bend-resistant overhead insulated conductor, comprising: a cable core 6, an insulation layer 4, a compensating wedge 5, a protective net 3 and a protective layer 1 arranged sequentially from the inside to the outside. Several bending grooves 2 are provided through the protective layer 1. The compensating wedges 5 are evenly distributed between the insulation layer 4 and the protective net 3. All components are coaxially assembled to form an integrated structure.
[0014] The compensating wedge 5 is made of an elastic material with a rhomboid cross-section and is evenly distributed along the circumference of the insulation layer 4. The height of the compensating wedge 5 is adapted to the inner diameter of the protective net 3, and is used to fill the gap between the insulation layer 4 and the protective net 3 and to compensate for temperature deformation.
[0015] The protective mesh 3 is a metal perforated mesh. The protective mesh 3 is embedded and fits the outer wall of the compensation wedge 5. The surface of the protective layer 1 is divided into a rectangular grid structure by bending grooves. The surface of the protective layer 1 is sprayed with a sealing coating.
[0016] Working principle: In use, the innermost cable core 6 serves as the core carrier for current transmission, directly undertaking the task of conducting electrical energy. The outer insulation layer 4 covers the cable core 6, which not only blocks current leakage and avoids the risk of leakage, but also provides basic insulation protection for the conductor, and lays the structural foundation for the assembly and function of the subsequent functional layers.
[0017] Compensating wedges 5 are evenly arranged on the outer side of the insulation layer 4. These components are made of elastomer materials such as silicone rubber, which have good elastic recovery and weather resistance. They can adapt to the outdoor environment for a long time without aging or becoming brittle. When the ambient temperature changes and the conductor expands and contracts due to heat, the compensating wedges 5 can absorb the deformation difference between the insulation layer 4 and the outer protective mesh 3 by their own elastic deformation. While filling the gap between the two, they also offset the internal stress and prevent each layer from being damaged by compression or stretching. At the same time, the gap formed between the compensating wedges 5 and the insulation layer 4 and the protective mesh 3 can also form a natural heat dissipation channel. The heat generated by the cable core 6 during operation can be transferred to the gap through the insulation layer 4 and then diffused outward with the help of external air flow, which helps to improve the overall heat dissipation effect of the conductor and helps to avoid local overheating from affecting the performance.
[0018] The protective mesh 3 attached to the outside of the compensating wedge 5 is a metal hollow structure made of tin-plated copper. It has sufficient structural strength to effectively support the internal insulation layer 4 and the compensating wedge 5, preventing the internal layers from collapsing or tearing when the conductor is bent. At the same time, the hollow structure avoids the elastic deformation of the compensating wedge 5, does not hinder the temperature deformation compensation process, and does not block the heat dissipation channel, ensuring that the support and heat dissipation functions do not interfere with each other. The protective layer 1 on the outside of the protective mesh 3 is made of modified thermoplastic plastics such as modified high-density polyethylene. These materials, with the addition of weather-resistant components, can resist outdoor wind, rain, dust and ultraviolet radiation, and have both toughness and impact resistance, and are not easy to crack at low temperatures. The surface of the protective layer 1 is divided into a rectangular grid structure by bending grooves 2. When the conductor is bent, the rectangular grid units can move slightly along the bending grooves 2, providing room for deformation, dispersing the local stress generated by bending, further preventing the protective layer 1 from cracking, and ensuring the external protection effect.
[0019] The surface of the protective layer 1 is also coated with a flexible silicone resin sealing coating. This type of coating can adhere tightly to the surface of the protective layer 1, fill the tiny gaps in the rectangular grid, effectively prevent impurities such as rainwater, dust and corrosive gases from penetrating into the wire, prevent damage to the structural stability of the internal functional layers, and its flexible properties can expand and contract synchronously with the bending deformation of the protective layer 1 without cracking due to deformation, maintain the sealing effect for a long time, and adapt to outdoor temperature fluctuations, making it less prone to falling off and failing.
[0020] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.
Claims
1. A bend-resistant overhead insulated conductor, characterized in that, include: The cable core (6), insulation layer (4), compensation wedge (5), protective net (3) and protective layer (1) are arranged sequentially from the inside to the outside. Several bending grooves (2) are provided through the protective layer (1). The compensation wedge (5) is evenly distributed between the insulation layer (4) and the protective net (3). All components are coaxially assembled to form an integrated structure.
2. The bend-resistant overhead insulated conductor according to claim 1, characterized in that, The compensation wedge (5) is made of an elastic material with a rhomboid cross-section and is evenly arranged along the circumference of the insulation layer (4). The height of the compensation wedge (5) is adapted to the inner diameter of the protective net (3) and is used to fill the gap between the insulation layer (4) and the protective net (3) and compensate for temperature deformation.
3. The bend-resistant overhead insulated conductor according to claim 1, characterized in that, The protective mesh (3) is a metal perforated mesh, and the protective mesh (3) is embedded in the outer wall of the compensation wedge (5).
4. The bend-resistant overhead insulated conductor according to claim 1, characterized in that, The surface of the protective layer (1) is divided into a rectangular grid structure by bending grooves, and the surface of the protective layer (1) is sprayed with a sealing coating.