An anti-flashover insulator

Abstract

The utility model relates to power equipment technical field, concretely relates to a kind of anti-flashover insulator, including insulator body, insulator body is composed of outer insulating sleeve and the core rod of being arranged in outer insulating sleeve, the inside of core rod is provided with metal shielding strip along the core rod height direction setting, umbrella skirt is integrally formed on the outer surface of outer insulating sleeve, umbrella skirt is alternately arranged and is composed of multiple big umbrella skirts and multiple small umbrella skirts, the top surface of big umbrella skirt and small umbrella skirt is all provided with second slope, the surface of second slope is provided with super-hydrophobic coating, the edge portion of big umbrella skirt and small umbrella skirt is provided with multiple ring-like equidistant arrangement tooth tip, recess is arranged between two tooth tips adjacent to each other.The utility model has good anti-flashover protection effect, and it is beneficial to the stable operation of system.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, and more specifically, to an anti-flashover insulator. Background Technology

[0002] In power transmission systems, insulators are key components that ensure the insulation performance and mechanical stability of electrical equipment. Their performance directly affects the safe and reliable operation of the power grid. With the development of the power industry, the requirements and performance of insulators are constantly increasing.

[0003] Patent CN118675823A discloses a glass insulator. It includes a steel cap, steel feet, and glass components. A cooling cavity is formed inside the skirt of the glass component, filled with coolant. A heat-spreading plate is installed inside the cooling cavity, and an insulating layer is bonded to the inner wall of the cooling cavity. During operation, the coolant moves due to the insulator's movement, causing the coolant to even out the insulator's temperature, preventing localized overheating. If the external environment is stable during operation, the coolant can achieve temperature equalization through evaporation and condensation using the heat-spreading plate. In the event of spontaneous breakage, the broken glass components are interconnected by the insulating layer, reducing the safety hazard of falling glass. Simultaneously, the heat-spreading plate provides good support for the glass components after breakage, preventing them from contacting other insulators due to loss of mechanical support and minimizing the loss of insulation capacity of the insulator string.

[0004] While this technical solution has its advantages, flashover remains a significant factor limiting insulator performance in practical applications. Traditional insulators are prone to surface flashover in complex environments such as dampness and pollution, where conductive paths easily form on their surfaces. When insulator surfaces are covered with large amounts of contaminants, such as industrial dust and salt particles, these contaminants combine with moisture to form an electrolyte solution in humid weather, drastically reducing the insulation resistance of the insulator surface. Under high voltage, this can easily trigger partial discharge, which can then develop into a through-flashover, causing serious consequences such as line tripping and equipment damage. Furthermore, some insulators have flawed structural designs that fail to effectively block the arc's propagation path, allowing flashovers to spread rapidly once they occur, increasing the difficulty of fault repair and the duration of power outages. Therefore, developing an insulator that can effectively prevent flashover and adapt to various complex environments is of significant practical importance. Utility Model Content

[0005] The purpose of this invention is to provide an anti-flashover insulator to address the deficiencies mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A flashover-proof insulator includes an insulator body, which consists of an outer insulating sleeve and a core rod disposed inside the outer insulating sleeve. A metal shielding strip is disposed inside the core rod along its height direction. A shed is integrally formed on the outer surface of the outer insulating sleeve. The shed consists of multiple large sheds and multiple small sheds arranged alternately. A second inclined surface is disposed on the top surface of each of the large and small sheds. A superhydrophobic coating is disposed on the surface of the second inclined surface. Multiple serrations are disposed at equal intervals in a ring at the edges of the large and small sheds, and a groove is disposed between each adjacent serration.

[0008] Preferably, the metal shielding strip is spiral-shaped and is connected to the grounding end of the insulator body;

[0009] This feature enables the metal shielding strip to homogenize the electric field when electric field distortion occurs on the insulator surface, thereby reducing the local electric field intensity and minimizing the occurrence of partial discharge.

[0010] Preferably, the tip of the tooth is provided with an arc-shaped end, and the cross-section of the arc-shaped end is arc-shaped;

[0011] This feature prevents the tooth tips from scratching workers during installation.

[0012] Preferably, a fixed base is fixedly installed at the bottom of the insulator body, and the fixed base is fixedly installed on external power equipment.

[0013] Preferably, a waterproof cover is fixedly installed between the bottom of the insulator body and the fixed base, and a first inclined surface is provided on the top surface of the waterproof cover.

[0014] Preferably, the second inclined surface is inclined downward at a rate of 10° to 30°, and the first inclined surface is inclined downward at a rate of 30° to 60°.

[0015] Preferably, the bottom of the fixed base is provided with a bottom anti-rust pad, and a plurality of support columns are fixedly installed between the bottom anti-rust pad and the fixed base;

[0016] This feature prevents the bottom of the fixed base from directly contacting the external frame, allowing the bottom of the fixed base to remain ventilated and thus achieving rust prevention and protection.

[0017] Preferably, an upper fixing base is fixedly installed on the top of the insulator body, a bolt hole is provided at one corner of the fixing base, a first elliptical hole is provided at another corner of the fixing base, and a second elliptical hole is provided at the remaining two corners of the fixing base.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. This utility model provides a spiral metal shielding strip inside the core rod that is connected to the grounding end. When electric field distortion occurs on the surface of the insulator, the metal shielding strip can adjust the electric field uniformly, reduce the local electric field intensity, reduce the occurrence of partial discharge, and effectively prevent flashover caused by electric field problems.

[0020] 2. This utility model designs the umbrella skirt as alternating large and small umbrella skirts, and provides a second inclined surface with a superhydrophobic coating on its top surface, as well as tooth tips with grooves on the edge. The superhydrophobic coating can reduce water adhesion, and the tooth tips and grooves can effectively block the arc development path and change the surface discharge channel, thereby suppressing the occurrence of flashover and adapting to complex environments such as humid and dirty environments.

[0021] 3. This utility model, by setting a fixed base with a bottom anti-rust pad and a column at the bottom of the insulator body, and installing a waterproof cover with a first inclined surface between the bottom and the fixed base, can not only prevent the bottom surface of the fixed base from rusting and extend the service life of the insulator, but also effectively prevent moisture from seeping into the connection between the insulator body and the fixed base, further improving the reliability and stability of the insulator in complex environments. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the large umbrella skirt of this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the fixed base of this utility model;

[0025] The meanings of the labels in the diagram are as follows:

[0026] 1. Insulator body; 10. Outer insulating sleeve; 11. Core rod; 12. Metal shielding strip; 13. Fixing base; 131. Bolt hole; 132. First elliptical hole; 133. Second elliptical hole; 14. Post; 141. Bottom anti-rust pad; 15. Waterproof wrapping sleeve; 151. First inclined surface; 16. Upper fixing seat;

[0027] 2. Umbrella skirt; 20. Large umbrella skirt; 21. Small umbrella skirt; 22. Second slope; 23. Superhydrophobic coating; 24. Tooth tip; 241. Groove; 25. Arc-shaped end. Detailed Implementation

[0028] 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.

[0029] Please see Figures 1-3 This utility model provides a technical solution: an anti-flashover insulator, including an insulator body 1, which is composed of an outer insulating sleeve 10 and a core rod 11 disposed inside the outer insulating sleeve 10. The core rod 11 is provided with a metal shielding strip 12 disposed along the height direction of the core rod 11. The metal shielding strip 12 is spiral-shaped and connected to the grounding end of the insulator body 1. When electric field distortion occurs on the surface of the insulator, the metal shielding strip can adjust the electric field uniformly, reduce the local electric field intensity, and reduce the occurrence of partial discharge. The core rod 11 can be made of glass fiber reinforced epoxy resin composite material, which has high mechanical strength and insulation performance.

[0030] like Figure 1 and Figure 2 As shown, an umbrella skirt 2 is integrally formed on the outer surface of the outer insulating sleeve 10. The umbrella skirt 2 is composed of multiple large umbrella skirts 20 and multiple small umbrella skirts 21 arranged alternately. A second inclined surface 22 is provided on the top surface of both the large umbrella skirts 20 and the small umbrella skirts 21. A superhydrophobic coating 23 is provided on the surface of the second inclined surface 22. Both the large umbrella skirts 20 and the small umbrella skirts 21 are made of composite silicone rubber material. The composite silicone rubber material itself has high insulation strength and can effectively block current leakage under high voltage. Combined with the structural design of the large umbrella skirts 20 and the small umbrella skirts 21, it can enhance the overall surface insulation capability of the insulator and reduce the risk of flashover caused by the formation of conductive paths in humid and dirty environments. The superhydrophobic coating 23 can make water droplets roll in a spherical shape on the surface of the umbrella skirt, making them difficult to adhere to, thereby reducing the surface conductivity caused by moisture. The superhydrophobic coating 23 can be supported by a fluoropolymer. Fluoropolymers have extremely low surface energy, which can effectively reduce liquid adhesion. At the same time, they have the characteristics of chemical corrosion resistance and strong weather resistance, making them suitable for complex outdoor environments.

[0031] like Figure 1 and Figure 2As shown, the edges of the large umbrella skirt 20 and the small umbrella skirt 21 are provided with multiple serrated tips 24 arranged in a ring at equal intervals. A groove 241 is provided between each pair of adjacent serrated tips 24. The ends of the serrated tips 24 are provided with arc-shaped ends 25. The cross-section of the arc-shaped ends 25 is arc-shaped, so that the serrated tips 24 will not cause scratches to the workers during installation, thus improving the safety of installation. Moreover, when a partial discharge occurs and generates an electric arc, the electric arc will be suppressed when it encounters the serrated tooth tip 24 structure during its climbing process due to the extension of the path and the change of electric field distribution, making it difficult to continue to develop and form a penetrating flashover.

[0032] like Figure 1 As shown, a fixed base 13 is fixedly installed at the bottom of the insulator body 1. The fixed base 13 is fixedly installed on the external power equipment, so that the insulator can be stably fixed on the external power equipment, ensuring the stability of the insulator during operation.

[0033] like Figure 1 As shown, a waterproof cover 15 is fixedly installed between the bottom of the insulator body 1 and the fixed base 13. A first inclined surface 151 is provided on the top surface of the waterproof cover 15, which makes it difficult for water to penetrate into the connection between the insulator body 1 and the fixed base 13, thereby further improving the reliability of the insulator in complex environments.

[0034] like Figure 1 As shown, the second inclined surface 22 is set to tilt downward at 10°~30°, and the first inclined surface 151 is set to tilt downward at 30°~60°, so that water can slide off the surfaces of the first inclined surface 151 and the second inclined surface 22 more quickly, reducing water residue and enhancing the anti-flashover and waterproof effects.

[0035] like Figure 1 As shown, a bottom anti-rust pad 141 is provided at the bottom of the fixed base 13. Multiple support columns 14 are fixedly installed between the bottom anti-rust pad 141 and the fixed base 13 to keep the bottom surface of the fixed base 13 ventilated and prevent the bottom surface of the fixed base 13 from directly contacting the external frame, which helps to achieve the effect of anti-rust protection and extend the service life of the insulator.

[0036] like Figure 1 and Figure 3 As shown, an upper fixing base 16 is fixedly installed on the top of the insulator body 1. A bolt hole 131 is provided at one corner of the fixing base 13, a first elliptical hole 132 is provided at another corner of the fixing base 13, and a second elliptical hole 133 is provided at the remaining two corners of the fixing base 13. This allows the insulator to better adapt to different installation requirements and improves the flexibility and convenience of installation.

[0037] When using the anti-flashover insulator of this utility model, firstly, the fixed base 13 is erected on the external power equipment installation surface by means of the column 14 at the bottom of the fixed base 13 and the bottom anti-rust pad 141. The insulator body 1 is flexibly adjusted and fixed by means of bolt holes 131, first elliptical holes 132 and second elliptical holes 133 and connecting parts of different specifications.

[0038] During operation, the spiral metal shielding strip 12 inside the core rod 11 is connected to the grounding terminal. Once electric field distortion occurs, the electric field is immediately homogenized and adjusted to reduce the local electric field intensity. The outer surface of the outer insulating sleeve 10 has alternating large umbrella skirts 20 and small umbrella skirts 21. Its top surface has a second inclined surface 22 with a superhydrophobic coating 23, which can quickly guide rainwater and reduce water adhesion. The edge teeth 24 and grooves 241 effectively block the development of electric arc during partial discharge. At the same time, the first inclined surface 151 and the second inclined surface 22 of the bottom waterproof sleeve 15 work together to quickly guide water away and prevent it from seeping into the connection part, thus achieving flashover protection.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A flashover-proof insulator, comprising an insulator body (1), characterized in that: The insulator body (1) consists of an outer insulating sleeve (10) and a core rod (11) disposed inside the outer insulating sleeve (10). The core rod (11) is provided with a metal shielding strip (12) disposed along the height direction of the core rod (11). The outer surface of the outer insulating sleeve (10) is integrally formed with a skirt (2). The skirt (2) is composed of multiple large skirts (20) and multiple small skirts (21) arranged alternately. The top surface of the large skirts (20) and the small skirts (21) is provided with a second inclined surface (22). The surface of the second inclined surface (22) is provided with a superhydrophobic coating (23). The edge of the large skirts (20) and the small skirts (21) is provided with multiple teeth (24) arranged in a ring at equal intervals. A groove (241) is provided between two adjacent teeth (24).

2. The flashover-proof insulator according to claim 1, characterized in that: The metal shielding strip (12) is spiral-shaped and is connected to the grounding end of the insulator body (1).

3. The flashover-proof insulator according to claim 1, characterized in that: The tip of the tooth (24) is provided with an arc-shaped end (25) at its end, and the cross-section of the arc-shaped end (25) is arc-shaped.

4. The anti-flashover insulator according to claim 1, characterized in that: The bottom of the insulator body (1) is fixedly installed with a fixed base (13), and the fixed base (13) is fixedly installed on the external power equipment.

5. The flashover-proof insulator according to claim 4, characterized in that: A waterproof cover (15) is fixedly installed between the bottom of the insulator body (1) and the fixed base (13), and a first inclined surface (151) is provided on the top surface of the waterproof cover (15).

6. The anti-flashover insulator according to claim 5, characterized in that: The second inclined surface (22) is inclined downward at 10°~30°, and the first inclined surface (151) is inclined downward at 30°~60°.

7. The flashover-proof insulator according to claim 5, characterized in that: The bottom of the fixed base (13) is provided with a bottom anti-rust pad (141), and a plurality of support columns (14) are fixedly installed between the bottom anti-rust pad (141) and the fixed base (13).

8. The flashover-proof insulator according to claim 5, characterized in that: The top of the insulator body (1) is fixedly installed with an upper fixing seat (16), a bolt hole (131) is provided at one corner of the fixing base (13), a first elliptical hole (132) is provided at another corner of the fixing base (13), and a second elliptical hole (133) is provided at the remaining two corners of the fixing base (13).

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