Insulator for electric power
Patent Information
- Application Number
- CN202522236676.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-23
- Publication Date
- 2026-09-18
- Estimated Expiration
- 2035-10-23
AI Technical Summary
[0004]针对上述中的相关技术，本申请人发现，其现有装置虽然整体安装简便，可以便捷的对线缆进行固定，但仍存在以下缺陷,绝缘子表面容易积聚具有导电性能的污秽物质，在潮湿天气下，这些污秽物质受潮后，会使绝缘子的绝缘水平大幅降低，在正常运行电压下就可能发生闪络事故，即污闪，污闪事故不仅会造成线路停电，影响电力供应的可靠性，还可能对电气设备造成损坏，增加维修成本和恢复供电的时间，其装置抗污闪能力较弱，综合实用性不足
通过采用高温硫化硅橡胶制成具有交替大伞裙、小伞裙及伞棱结构的绝缘件，并在其表面覆盖0.2mm至0.3mm的有机硅防污闪涂层，同时合理设置乙烯基单体含量和白炭黑比表面积，显著提升了绝缘子的憎水性和抗污秽积聚能力；配合铝合金均压环与屏蔽环，有效改善了电场分布，抑制了局部电弧产生，从而大幅增强了绝缘子在潮湿污秽环境下的抗污闪性能，降低了污闪事故风险，保障了电力系统的可靠运行。
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Figure CN224773636U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of insulator technology, and in particular to an insulator for power applications. Background Technology
[0002] As is well known, in power transmission systems, insulators, as the core components connecting towers and conductors, must simultaneously undertake the dual functions of mechanical support and electrical insulation. Their performance directly affects the safety and stability of power transmission. Currently, power systems mostly operate in complex outdoor environments, and insulators are often exposed to erosion from rainwater, dust, and industrial pollutants, which can easily lead to pollution flashover and wet flashover faults, causing line tripping.
[0003] In related technologies, a search revealed a utility model patent with publication number CN216450459U that discloses an insulator for power applications, comprising: a clamp and a wire clamp at the end of the insulator, the wire clamp being used to fix the cable, and the clamp fixing the wire clamp to the end of the insulator; the entire device can be fixed with a single bolt, making installation and operation more convenient than traditional winding and pressing methods.
[0004] Regarding the aforementioned technologies, the applicant has found that although the existing device is easy to install and can conveniently fix cables, it still has the following defects: conductive contaminants easily accumulate on the surface of the insulator. In humid weather, these contaminants become damp, which can significantly reduce the insulation level of the insulator, potentially causing flashover accidents, i.e., pollution flashover, under normal operating voltage. Pollution flashover accidents not only cause power outages and affect the reliability of power supply, but may also damage electrical equipment, increase maintenance costs and the time required to restore power. The device has weak anti-pollution flashover capability and insufficient overall practicality.
[0005] Therefore, we propose a power insulator with strong anti-pollution flashover capability. Utility Model Content
[0006] The purpose of this invention is to provide an insulator for electrical applications to solve the problems mentioned in the background section.
[0007] To achieve the above objectives, this utility model provides the following technical solution: An insulator for electrical applications, comprising: An insulating component, the insulating component being made of high-temperature vulcanized silicone rubber, the insulating component having alternating large umbrella skirts and small umbrella skirts, the surface of the large umbrella skirts being provided with an umbrella rib structure; The tower-side connection assembly includes a U-shaped hanging ring and a first ball head fixedly mounted thereon; An insulating component connecting post is fixedly disposed on the top end of the insulating component. The top end of the insulating component connecting post is provided with a first ball socket that is adapted to the first ball head to form a first ball hinge point. The conductor-side connection assembly includes a second ball head fixedly disposed at the bottom end of the insulator, and a bowl-shaped hanging plate connected to the second ball head through a ball-and-socket structure; The protective component includes an equalizing ring fitted on the top region of the insulating component and a shielding ring fitted on the bottom region of the insulating component, the equalizing ring and the shielding ring being made of aluminum alloy; the surface of the insulating component is covered with an organosilicon anti-flashover coating, the thickness of the anti-flashover coating being 0.2 mm to 0.3 mm.
[0008] As a further embodiment of this utility model: in the high-temperature vulcanized silicone rubber, the content of vinyl monomer is 0.05mol / kg to 0.15mol / kg, and the specific surface area of the silica used as reinforcing filler is 150m² / g to 200m² / g.
[0009] As a further embodiment of this utility model: the diameter of the large umbrella skirt is 200mm to 250mm, the diameter of the small umbrella skirt is 120mm to 160mm, and the height of the umbrella ribs is 10mm to 15mm.
[0010] As a further improvement of this utility model, the surfaces of the tower-side connection assembly, the insulating component connection post, and the conductor-side connection assembly are all hot-dip galvanized.
[0011] As a further improvement of this utility model: the tower side connection assembly further includes a connecting bolt, which is used to fix the U-shaped hanging ring to the tower crossarm, and the connecting bolt is made of high-strength alloy steel with a tensile strength of not less than 800MPa.
[0012] As a further embodiment of this utility model: the radius of the equalizing ring is 150mm to 200mm, and the radius of the shielding ring is 80mm to 120mm.
[0013] As a further improvement of this utility model, the insulating component is integrally formed by a high-temperature molding process, with a molding and vulcanization temperature of 170°C to 190°C and a vulcanization time of 15 to 25 minutes.
[0014] As a further improvement of this utility model, the bowl head hanging plate is provided with wire holes.
[0015] Compared with the prior art, the beneficial effects of this utility model are: By using high-temperature vulcanized silicone rubber to make insulators with alternating large and small umbrella skirts and umbrella ribs, and covering their surface with a 0.2mm to 0.3mm silicone anti-pollution flashover coating, while rationally setting the vinyl monomer content and the specific surface area of silica, the hydrophobicity and anti-pollution accumulation ability of the insulators are significantly improved. Combined with aluminum alloy equalizing rings and shielding rings, the electric field distribution is effectively improved and the generation of local electric arcs is suppressed, thereby greatly enhancing the anti-pollution flashover performance of the insulators in humid and polluted environments, reducing the risk of pollution flashover accidents, and ensuring the reliable operation of the power system. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an exploded structural diagram showing the fit between the U-shaped hanging ring, the first ball head, and the insulating connecting post of this utility model; Figure 3 This is an exploded structural diagram of the second ball head and the bowl head hanging plate of this utility model. Figure 4 This utility model Figure 1 A magnified schematic diagram of the structure at point A in the middle.
[0017] In the diagram: 1. Large umbrella skirt; 2. Small umbrella skirt; 3. Umbrella rib; 4. U-shaped hanging ring; 5. First ball head; 6. Insulating component connecting post; 7. Second ball head; 8. Bowl head hanging plate; 9. Equalizing ring; 10. Shielding ring. Detailed Implementation
[0018] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0019] The present application will be further described in detail below with reference to the accompanying drawings.
[0020] Please see Figures 1-4 In this embodiment of the utility model, an insulator for power applications includes: An insulating component, made of high-temperature vulcanized silicone rubber, has alternating large umbrella skirts 1 and small umbrella skirts 2, and the surface of the large umbrella skirts 1 is provided with umbrella ribs 3. The tower-side connection assembly includes a U-shaped hanging ring 4 and a first ball head 5 fixedly mounted thereon; An insulating component connecting post 6 is fixedly disposed on the top of the insulating component. The top of the insulating component connecting post 6 is provided with a first ball socket that is adapted to the first ball head 5 to form a first ball hinge point. The conductor-side connection assembly includes a second ball head 7 fixedly disposed at the bottom end of the insulator, and a bowl head mounting plate 8 connected to the second ball head 7 through a ball-and-socket structure; The protective component includes an equalizing ring 9 fitted onto the top region of the insulating component and a shielding ring 10 fitted onto the bottom region of the insulating component. The equalizing ring 9 and the shielding ring 10 are made of aluminum alloy. The surface of the insulating component is covered with an organosilicon anti-flashover coating with a thickness of 0.2 mm to 0.3 mm.
[0021] During installation, this type of power insulator is first pre-fixed using a U-shaped hanging ring 4 in the tower-side connecting assembly with matching connectors. Then, the first ball head 5 on the U-shaped hanging ring 4 is precisely aligned with the first ball socket of the insulator top connecting post 6 to form the first ball hinge point, achieving a flexible and stable connection between the insulator and the tower. Next, the conductor is passed through the reserved installation position of the cup-head hanging plate 8 in the conductor-side connecting assembly and fixed with fasteners. Then, the ball socket structure of the cup-head hanging plate 8 is adapted and connected with the second ball head 7 at the bottom of the insulator to complete the construction of the mechanical and conductive path between the conductor and the insulator. During operation, the insulating component made of high-temperature vulcanized silicone rubber serves as the core insulating carrier. Its alternating structure of large umbrella skirt 1, small umbrella skirt 2, and umbrella ribs 3 on the surface of large umbrella skirt 1, combined with a 0.2mm to 0.3mm thick organic silicone anti-flashover coating, can block rainwater runoff, reduce pollutant adhesion, and avoid flashover faults. At the same time, the equalizing ring 9 fitted on the top area of the insulating component in the protective component optimizes the electric field distribution and prevents corona discharge, while the aluminum alloy shielding ring 10 fitted on the bottom area improves the problem of electric field concentration at the conductor connection point. The two work together to ensure stable insulation performance and ultimately achieve safe and continuous power transmission.
[0022] exist Figure 1-4 In high-temperature vulcanized silicone rubber, the content of vinyl monomers is 0.05 mol / kg to 0.15 mol / kg, and the specific surface area of silica used as a reinforcing filler is 150 m² / g to 200 m² / g.
[0023] This type of power insulator ensures comprehensive performance through multi-dimensional synergistic optimization. High-temperature vulcanized silicone rubber controls the vinyl monomer content to optimize crosslinking density, balancing elasticity and aging resistance. It is combined with 150-200 m² / g of silica to enhance mechanical strength and tear resistance. Alternating large and small umbrella skirts (1), along with 10-15mm high umbrella ribs (3), increase creepage distance and block rainwater runoff. A 0.2-0.3mm silicone anti-flashover coating reduces contaminant adhesion. Simultaneously, the equalizing ring (9) and shielding ring (10) optimize the electric field distribution and prevent corona discharge. A high-temperature molding process at 170-190℃ for 15-25 minutes ensures the density and dimensional accuracy of the insulation components. Hot-dip galvanized layers on the tower and conductor sides provide corrosion protection. High-strength alloy steel bolts with a tensile strength ≥800MPa and ball joint design meet the connection strength requirements between the tower and conductor. Overall, it is suitable for complex outdoor power transmission environments, achieving a comprehensive improvement in insulation, mechanical properties, anti-flashover, and corrosion resistance.
[0024] exist Figure 1-4 In the middle section: the diameter of the large umbrella skirt 1 is 200mm to 250mm, the diameter of the small umbrella skirt 2 is 120mm to 160mm, and the height of the umbrella rib 3 is 10mm to 15mm.
[0025] This type of power insulator features alternating large and small umbrella skirts 1 and 2, which significantly increases the creepage distance of the insulator and slows down the accumulation rate of dirt on the surface. At the same time, the size difference blocks the continuous runoff of rainwater and reduces the conductive path when rainwater washes over it. The umbrella rib structure 3, with a height of 10mm to 15mm, further divides the surface area of the umbrella skirts, enhances the blocking effect of water droplets and fog droplets, reduces the probability of conductivity after the surface becomes damp, and improves the overall anti-pollution flashover performance and wet flashover resistance of the insulator, making it suitable for complex outdoor meteorological environments.
[0026] exist Figure 1-4 In the middle section: the surfaces of the tower-side connection assembly, the insulating component connection post 6, and the conductor-side connection assembly all have a hot-dip galvanized layer.
[0027] This type of power insulator features a hot-dip galvanized layer on the surface of the tower-side connecting components, the insulating connecting post 6, and the conductor-side connecting components. This layer forms a dense and strongly adhesive zinc protective layer on the surface of the components. On the one hand, this protective layer can isolate corrosive media such as air, rainwater, and dust from direct contact with the component substrate, preventing oxidation and corrosion of the substrate. On the other hand, even if the protective layer is partially damaged, zinc can preferentially corrode through the sacrificial anode effect, thereby protecting the substrate from corrosion. Ultimately, this extends the outdoor service life of these connecting components, ensuring the stability and reliability of the connection structure between the insulator and the tower and conductor, and guaranteeing the safety of power transmission.
[0028] exist Figure 1-4The tower side connection assembly also includes connecting bolts, which are used to fix the U-shaped hanging ring 4 to the tower crossarm. The connecting bolts are made of high-strength alloy steel with a tensile strength of not less than 800MPa.
[0029] This type of power insulator uses high-strength alloy steel with a tensile strength of not less than 800MPa for the connecting bolts. This provides sufficient mechanical bearing capacity for fixing the U-shaped hanging ring 4 to the tower crossarm. It can stably withstand the weight of the insulator itself, the tension of the conductor, and complex external forces such as outdoor wind load and icing load, avoiding tensile deformation or breakage of the bolts due to insufficient strength. At the same time, this material also has good fatigue resistance, maintaining structural stability under long-term stress, ensuring the connection reliability of the tower-side connecting components, and thus ensuring the installation stability and operational safety of the entire insulator in the power transmission system.
[0030] exist Figure 1-4 In the middle: the ring radius of the equalizing ring 9 is 150mm to 200mm, and the ring radius of the shielding ring 10 is 80mm to 120mm.
[0031] This type of power insulator features an equalizing ring 9 and a shielding ring 10 with differentiated radii to adapt to the electric field requirements of different areas of the insulator. The equalizing ring 9 optimizes the electric field distribution at the connection between the top of the insulator and the tower, preventing corona discharge due to excessive field strength in this area, thus reducing power loss and corona noise. The shielding ring 10 improves the problem of electric field concentration at the connection between the bottom of the insulator and the conductor, preventing local field strength from exceeding the standard and breaking down the air to form an electric arc. It also prevents rainwater, dust, and other debris from directly adhering to the connection node. The two work together to ensure the stable insulation performance of the insulator under high voltage conditions and reduce the risk of equipment failure caused by partial discharge.
[0032] exist Figure 1-4 In the middle: the insulating parts are integrally formed by high temperature molding process, and the molding and vulcanization temperature is 170℃ to 190℃, and the vulcanization time is 15 minutes to 25 minutes.
[0033] This type of power insulator uses a high-temperature molding process to integrally form the insulating components. The molding and vulcanization temperature is controlled between 170°C and 190°C, and the vulcanization time is set between 15 and 25 minutes. This ensures that the high-temperature vulcanized silicone rubber material is fully cross-linked and cured, forming a dense and uniform overall structure. This avoids defects such as bubbles and gaps inside the insulating components due to insufficient vulcanization. At the same time, the reasonable combination of temperature and time ensures that the mechanical and insulation properties of the material meet the standards, while avoiding over-vulcanization that can cause the material to age and become brittle. The integral molding process also allows the insulating components to form a solid whole with the sheds and connecting posts, reducing the insulation risks caused by splicing gaps, improving the overall structural stability and resistance to external impacts of the insulating components, and making them suitable for long-term outdoor use.
[0034] exist Figure 1-4 In the middle: The bowl head hanging plate 8 has a wire hole.
[0035] This type of power insulator has conductor holes on the cup-head mounting plate 8. Its core function is to provide a stable installation and fixing point for the conductor, so that the conductor can be firmly connected to the cup-head mounting plate 8 through matching fasteners. This ensures a reliable mechanical connection and conductive path between the conductor and the bottom of the insulator. At the same time, the hole design can adapt to the installation requirements of conductors of different specifications, and the standardized hole size can ensure the balanced force on the conductor after connection. This prevents the conductor from shaking or shifting due to unstable installation, thereby preventing overheating due to poor contact at the connection point, or wear and breakage of the conductor due to uneven force, thus ensuring the stability and safety of power transmission.
[0036] In this embodiment, the equalizing ring 9 and the shielding ring 10 are commercially available devices known to those skilled in the art. They can be customized or selected according to actual needs. Here, we are only using them without making any structural or functional improvements, and we will not go into detail here.
[0037] The implementation principle of an electrical insulator according to an embodiment of this application is as follows: First, the user fixes the U-shaped hanging ring 4 to the tower crossarm using high-strength alloy steel connecting bolts with a tensile strength of not less than 800MPa in the tower-side connection assembly. Then, the first ball head 5 on the U-shaped hanging ring 4 aligns with the first ball socket of the insulator top connecting post 6, forming the first ball hinge point and completing the stable connection between the insulator and the tower. Subsequently, the conductor is passed through the conductor hole of the cup-head hanging plate 8 in the conductor-side connection assembly and fixed with matching fasteners, ensuring a reliable connection between the conductor and the cup-head hanging plate 8. The cup-head hanging plate 8, through its ball socket structure, adapts to the second ball head 7 at the bottom of the insulator, achieving the connection between the conductor and the insulator. During operation... The insulator is integrally molded from high-temperature vulcanized silicone rubber at 170-190℃ for 15-25 minutes. With its alternating structure of large umbrella skirts 1, small umbrella skirts 2, and umbrella ribs 3, combined with a 0.2-0.3mm thick silicone anti-flashover coating, it blocks rainwater runoff, reduces pollutant adhesion, and enhances anti-flashover capability. At the same time, the equalizing ring 9 fitted on the top area of the insulator optimizes the electric field distribution to avoid corona discharge, and the shielding ring 10 fitted on the bottom area improves the problem of electric field concentration at the conductor connection. In addition, the hot-dip galvanized layer on the surface of the tower-side connection component, the insulator connection post 6, and the conductor-side connection component isolates the corrosive medium, jointly ensuring that the insulator can stably transmit power in complex outdoor environments.
Claims
1. An insulator for electric power, characterized by, include: An insulating component made of high-temperature vulcanized silicone rubber, the insulating component having alternating large umbrella skirts (1) and small umbrella skirts (2), the surface of the large umbrella skirts (1) being provided with umbrella rib (3) structures; The tower-side connection assembly includes a U-shaped hanging ring (4) and a first ball head (5) fixed thereon; An insulating component connecting post (6) is fixedly disposed on the top end of the insulating component. The top end of the insulating component connecting post (6) is provided with a first ball socket that is adapted to the first ball head (5) to form a first ball hinge point. The conductor-side connection assembly includes a second ball head (7) fixedly disposed at the bottom end of the insulator, and a bowl head plate (8) connected to the second ball head (7) through a ball-and-socket structure. The protective component includes an equalizing ring (9) fitted on the top region of the insulating component and a shielding ring (10) fitted on the bottom region of the insulating component. The equalizing ring (9) and the shielding ring (10) are made of aluminum alloy. The surface of the insulating component is covered with an organosilicon anti-flashover coating with a thickness of 0.2 mm to 0.3 mm.
2. An electrical insulator according to claim 1, characterised in that: In the high-temperature vulcanized silicone rubber, the content of vinyl monomer is from 0.05 mol / kg to 0.15 mol / kg, and the silica used as a reinforcing filler has a specific surface area of 150 m² / g to 200 m² / g.
3. An electrical insulator according to claim 1, wherein: The diameter of the large umbrella skirt (1) is 200mm to 250mm, the diameter of the small umbrella skirt (2) is 120mm to 160mm, and the height of the umbrella rib (3) is 10mm to 15mm.
4. An insulator for power applications according to claim 1, characterized in that: The surfaces of the tower-side connection assembly, the insulating component connection post (6), and the conductor-side connection assembly are all hot-dip galvanized.
5. An electrical insulator according to claim 1, wherein: The tower-side connection assembly also includes a connecting bolt, which is used to fix the U-shaped hanging ring (4) to the tower crossarm. The connecting bolt is made of high-strength alloy steel with a tensile strength of not less than 800MPa.
6. An insulator for power applications according to claim 1, characterized in that: The radius of the equalizing ring (9) is 150mm to 200mm, and the radius of the shielding ring (10) is 80mm to 120mm.
7. An electrical insulator according to claim 1, wherein: The insulating component is integrally formed by a high-temperature molding process, with a molding and vulcanization temperature of 170°C to 190°C and a vulcanization time of 15 to 25 minutes.
8. An electrical insulator according to claim 1, wherein: The bowl head hanging plate (8) has a wire hole.