Anti-icing insulator

Abstract

The utility model provides an anti-icing ceramic insulator. The anti-icing ceramic insulator comprises umbrella skirts and a ceramic core rod, and a fluorosilicone resin anti-icing coating is compounded on the surface of the umbrella skirt. According to the anti-icing ceramic insulator provided by the utility model, the fluorosilicone resin super-hydrophobic anti-icing coating is compounded on the surface of the umbrella skirt, so that the adhesive force between ice and the umbrella skirt of the insulator is greatly reduced, and the hydrophobicity of the surface is improved. And the rough surface of the super-hydrophobic anti-icing coating can reduce the effective contact area between the coating and dirt, water drops have an opportunity to take away most dirt on the surface when rolling down to the super-hydrophobic surface, and the anti-fouling effect can be achieved to a certain extent. According to the anti-icing ceramic insulator provided by the utility model, the reduction of flashover voltage of the insulator caused by icing and the occurrence of ice disaster emergency repair are greatly reduced, the occurrence of aging, cracking and slag falling caused by the fact that the ceramic insulator is exposed to wind, sand, wind and the sun can also be reduced, and the anti-icing ceramic insulator is simple in structure and convenient to use. The method is more suitable for large-scale popularization and application.

Description

Technical Field

[0001] The utility model belongs to the technical field of insulator preparation, and relates to an anti-icing insulator, in particular to an anti-icing electric porcelain post insulator. Background Art

[0002] Insulators are a special type of insulating control that can play an important role in overhead transmission lines. They play two basic roles in overhead transmission lines, namely supporting the conductors and preventing current from returning to the ground. They are also used to increase creepage distances. They are usually made of glass or ceramic. In practical applications, porcelain insulators have been widely used because of their advantages in weather resistance, mechanical strength, and cost. There are many types of porcelain insulators. According to their structure, they can be divided into pillar (post) insulators, suspension insulators, pin insulators, butterfly insulators, tension insulators, anti-pollution insulators, and bushing insulators.

[0003] Ice disasters on transmission lines are one of the most serious threats to the power system. Compared with other types of power grid accidents, ice disasters cause more serious losses to the power grid. On the one hand, the accumulation of ice and snow changes the external structure of the insulator. In particular, the generation of ice changes the leakage path along the surface of the insulator, causing the potential distribution on the surface of the insulator to change. At the same time, ice and snow melt under the Joule heat generated by the leakage current, making the surface of the insulator dirty and moist, resulting in a decrease in the surface resistance of the insulator, thereby reducing the flashover voltage of the insulator. On the other hand, when an ice disaster occurs, the harsh climatic conditions make it very difficult to repair the affected transmission lines, resulting in a long power outage time for the power grid, resulting in huge economic losses. Especially for high-voltage line support insulators, due to their high installation height, they are greatly affected by wind, sand, ice and snow, and are more difficult to repair.

[0004] In recent years, due to the impact of global warming, extreme weather has occurred frequently, the probability of ice disasters has increased, and the impact of ice disasters on power grid safety has become more significant. Therefore, it is of great significance to study the anti-icing technology of transmission lines. At present, the main anti-icing and de-icing methods include mechanical de-icing, thermal anti-icing, passive anti-icing, and coating anti-icing. Among them, the coating anti-icing method is also a passive anti-icing method, mainly electric thermal anti-icing coatings and photothermal anti-icing coatings. The purpose of anti-icing is achieved by adjusting the temperature of the coating during the icing process. However, when there is no icing, there is still leakage current passing through the coating. Therefore, it will not only increase the line loss, but its thermal effect will also accelerate the aging of the coating.

[0005] Therefore, how to obtain an anti-icing insulator that can reduce the occurrence of icing, thereby reducing the reduction of the flashover voltage of the insulator caused by icing and ice disaster repair, has become one of the urgent problems to be solved by many front-line researchers in this field. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide an anti-icing insulator, in particular, an anti-icing electric porcelain post insulator. The anti-icing insulator provided by the utility model has a fluorosilicone resin super-hydrophobic anti-icing coating on the surface of the shed, which greatly reduces the occurrence of icing, thereby reducing the reduction of the flashover voltage of the insulator caused by icing and the occurrence of ice disaster repairs, and has a simple structure, which is more suitable for large-scale promotion and application.

[0007] The utility model provides an anti-icing ceramic insulator, comprising a shed and a ceramic core rod;

[0008] The surface of the shed is compounded with a fluorosilicone resin anti-icing coating.

[0009] Preferably, the anti-icing coating on the surface of the shed has a thickness of 1 to 15 mm;

[0010] The anti-icing coating is a hydrophobic anti-icing coating.

[0011] Preferably, the fluorosilicone resin is a fluorosilicone resin cross-linked by fluoroalkyl polysiloxane and vinyl polysiloxane.

[0012] Preferably, the ceramic insulator comprises a post porcelain insulator;

[0013] The fluorosilicone hydrophobic anti-icing coating has a slope at the junction of the shed and the porcelain core rod.

[0014] Preferably, the fluorosilicone resin cross-linked by fluoroalkyl polysiloxane and vinyl polysiloxane is specifically POSS cross-linked modified fluoroalkyl polysiloxane and vinyl polysiloxane;

[0015] The included angle between the inclined surface and the porcelain core rod is 10° to 60°.

[0016] Preferably, the junction between the shed and the porcelain core rod includes the junction between the upper surface of the shed and the porcelain core rod, and / or the junction between the lower surface of the shed and the porcelain core rod;

[0017] The coating thickness at the root of the shed is greater than or equal to the coating thickness at the edge of the shed.

[0018] Preferably, the surface of the ceramic core rod is compounded with a fluorosilicone anti-icing coating;

[0019] The thickness of the anti-icing coating on the surface of the porcelain core rod is 1 to 15 mm.

[0020] Preferably, the pillar porcelain insulator is a top-binding type line pillar porcelain insulator;

[0021] The height of the support porcelain insulator is 222-370 mm.

[0022] Preferably, the ceramic insulator includes an aluminum porcelain insulator and / or a silicon porcelain insulator.

[0023] Preferably, the aluminum porcelain insulator includes a high-aluminum porcelain insulator and / or a medium-aluminum porcelain insulator.

[0024] The utility model provides an anti-icing ceramic insulator, including an umbrella skirt and a porcelain core rod; the surface of the umbrella skirt is compounded with a fluorosilicone resin anti-icing coating. Compared with the prior art, the utility model is aimed at the existing electrothermal anti-icing coating and photothermal anti-icing coating, which will increase line loss, and its thermal effect will also accelerate the aging of the coating. The utility model is based on the principle of a lotus leaf-like super-hydrophobic coating. Since the lotus leaf surface has extremely strong hydrophobicity, water droplets and dust are subject to very small adhesion force on the lotus leaf surface. Therefore, water droplets can adhere to and take away dust on the lotus leaf surface when rolling, so that the lotus leaf surface is always kept clean. When supercooled water drops fall on the surface of the super-hydrophobic coating, due to the small adhesion force, it can quickly roll away before releasing its own latent heat. Therefore, coating a specific super-hydrophobic coating on the surface of the conductor and insulator can significantly reduce the adhesion of ice and snow on the conductor or insulator, delay the growth of surface ice, and help improve the anti-icing and anti-fouling capabilities of the transmission line.

[0025] The anti-icing ceramic insulator provided by the utility model has a specific anti-icing coating arranged at a specific position of the insulator, that is, a fluorosilicone super-hydrophobic anti-icing coating is compounded on the surface of the shed, which greatly reduces the adhesion between ice and the insulator shed and improves the hydrophobicity of the surface. Moreover, the super-hydrophobic coating can not only reduce the wettability of the insulator surface, but its rough surface can also reduce the effective contact area between the coating and dirt. When water droplets roll down the super-hydrophobic surface, they have a chance to take away most of the dirt on the surface, which not only improves the anti-icing performance of the coating, but also plays an anti-fouling role to a certain extent. At the same time, the anti-icing ceramic insulator compounded with the fluorosilicone anti-icing coating provided by the utility model has a good bonding force between the fluorosilicone anti-icing coating and the fluorosilicone, and is not easy to fall off. The anti-icing ceramic insulator provided by the utility model greatly reduces the occurrence of icing, thereby reducing the reduction of the flashover voltage of the insulator caused by icing and the occurrence of ice disaster emergency repairs, and can also reduce the aging, cracking and chipping of the porcelain insulator itself caused by wind, sand and sun exposure. It has a simple structure and is more suitable for large-scale promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of the super-hydrophobic anti-icing ceramic insulator provided by the utility model. DETAILED DESCRIPTION

[0027] In order to further understand the present invention, the preferred embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention rather than limiting the patent requirements of the present invention.

[0028] All materials of the present invention have no particular restrictions on their sources, and can be purchased on the market or prepared according to conventional methods well known to those skilled in the art.

[0029] There is no special restriction on the purity of all materials in the utility model. The utility model preferably adopts industrial purity or conventional purity used in the field of electric porcelain insulator preparation.

[0030] The brands and abbreviations of all materials of the present invention are conventional brands and abbreviations in the field. Each brand and abbreviation is clear and definite in the field of its related use. Those skilled in the art can purchase them from the market or prepare them by conventional methods according to the brands, abbreviations and corresponding uses.

[0031] The abbreviations of all processes in the utility model are conventional abbreviations in the field, and each abbreviation is clear and unambiguous in the field of its related use. Those skilled in the art can understand its conventional process steps based on the abbreviations.

[0032] The utility model provides an anti-icing ceramic insulator, comprising a shed and a ceramic core rod;

[0033] The surface of the shed is compounded with a fluorosilicone resin anti-icing coating.

[0034] In principle, the utility model has no special restrictions on the specific model of the ceramic insulator. Those skilled in the art can select and adjust it according to the actual application, quality requirements and performance requirements. In order to better ensure the anti-icing effect, improve the anti-dust erosion, anti-fouling effect and coating bonding strength, the ceramic insulator preferably includes a pillar porcelain insulator, and more preferably a top-binding type line pillar porcelain insulator. The height of the pillar porcelain insulator of the utility model is preferably 222-370 mm, more preferably 224-336 mm, more preferably 283-305 mm, and more preferably 293-298 mm.

[0035] The anti-icing ceramic insulator of the utility model comprises sheds and a porcelain core rod. In the utility model, the sheds are the conventional shed parts of the insulator, and the porcelain core rod is a rod-shaped main body connecting different sheds.

[0036] In principle, the utility model has no special restrictions on the specific material of the ceramic insulator. Those skilled in the art can select and adjust it according to the actual application conditions, quality requirements and performance requirements. In order to better ensure the anti-icing effect, improve the anti-dust erosion, anti-fouling effect and coating bonding strength, the ceramic insulator preferably includes aluminum porcelain insulators and / or silicon porcelain insulators, more preferably aluminum porcelain insulators or silicon porcelain insulators, and more preferably aluminum porcelain insulators. Among them, the aluminum porcelain insulator preferably includes high-aluminum porcelain insulators and / or medium-aluminum porcelain insulators, more preferably high-aluminum porcelain insulators or medium-aluminum porcelain insulators.

[0037] In principle, the utility model has no special restrictions on the anti-icing coating, and those skilled in the art can select and adjust it according to the actual application conditions, quality requirements and performance requirements. In order to better ensure the anti-icing effect, improve the anti-wind and dust erosion, anti-fouling effect and coating adhesion, the anti-icing coating is more preferably a hydrophobic anti-icing coating.

[0038] In principle, the present invention has no special restrictions on the parameters of the anti-icing coating, and those skilled in the art can select and adjust them according to actual application conditions, quality requirements and performance requirements. In order to better ensure the anti-icing effect, improve the anti-dust erosion, anti-fouling effects and coating bonding strength, the thickness of the anti-icing coating on the surface of the umbrella skirt is preferably 1-15 mm, more preferably 3-13 mm, more preferably 5-11 mm, and more preferably 7-9 mm.

[0039] In principle, the present invention has no particular restrictions on the selection of the fluorosilicone resin, and those skilled in the art can select and adjust it according to the actual application conditions, quality requirements and performance requirements. In order to better ensure the anti-icing effect, improve the anti-dust erosion, anti-fouling effect and coating adhesion, the fluorosilicone resin is preferably a fluorosilicone resin with super hydrophobic anti-icing properties, and more preferably a fluorosilicone resin cross-linked by fluoroalkyl polysiloxane and vinyl polysiloxane, specifically POSS cross-linked modified fluoroalkyl polysiloxane and vinyl polysiloxane.

[0040] In principle, the present invention has no particular restrictions on the specific composition of the POSS cross-linked modified fluoroalkyl polysiloxane and vinyl polysiloxane. Those skilled in the art can select and adjust according to the actual application conditions, quality requirements and performance requirements. In order to better ensure the anti-icing effect, improve the anti-dust erosion, anti-fouling effect and coating bonding strength, the specific composition of the POSS cross-linked modified fluoroalkyl polysiloxane and vinyl polysiloxane can be:

[0041] Fluoroalkyl polysiloxane: 10% to 30%;

[0042] Vinyl polysiloxane: 110%~30%;

[0043] Functionalized POSS: 2% to 8%;

[0044] Catalyst: 0.0005%~0.0015%;

[0045] The balance is solvent;

[0046] The structural formula of functionalized POSS is:

[0047]

[0048] In the formula, R is one of H, -O-Si(CH3)2-H or -CH=CH2.

[0049] In terms of structure, the utility model has been further improved, and the fluorosilicone resin hydrophobic anti-icing coating preferably has an inclined surface at the junction of the shed and the porcelain core rod. In principle, the utility model has no special restrictions on the specific parameters of the inclined surface, and those skilled in the art can select and adjust according to the actual application conditions, quality requirements and performance requirements. In order to better ensure the anti-icing effect, improve the anti-dust erosion, anti-fouling effect and coating bonding strength, the angle between the inclined surface and the porcelain core rod is preferably 10° to 60°, more preferably 20° to 50°, and more preferably 30° to 40°.

[0050] In the utility model, the super-hydrophobic anti-icing coating is provided with an inclined surface at the junction of the umbrella skirt and the porcelain core rod of the pillar porcelain insulator, which is not only more conducive to the sliding and detachment of ice and snow covering the surface of the insulator, but also the thickness of the inclined surface is relatively thick, which can help prevent the erosion of sand and dust at this position of the pillar porcelain insulator, and further solve the problem that the eroded pillar porcelain insulator is prone to snow and ice accumulation at this position. In addition, the setting of the inclined surface can also reduce the susceptibility of the porcelain insulator at this position to wind and sand, wind and sun, and the occurrence of aging, cracking and slag falling.

[0051] In principle, the utility model has no special restrictions on the specific definition of the junction, and those skilled in the art can select and adjust it according to the actual application conditions, quality requirements and performance requirements. In order to better ensure the anti-icing effect, improve the anti-dust erosion, anti-fouling effect and coating bonding strength, the junction of the shed and the porcelain core rod preferably includes the junction of the upper surface of the shed and the porcelain core rod, and / or, the junction of the lower surface of the shed and the porcelain core rod, more preferably the junction of the upper surface of the shed and the porcelain core rod and / or the junction of the lower surface of the shed and the porcelain core rod, specifically, it can be the junction of the upper surface of the shed and the porcelain core rod.

[0052] In principle, the utility model has no special restrictions on the variation of the coating thickness on the umbrella skirt. Those skilled in the art can select and adjust according to the actual application conditions, quality requirements and performance requirements. In order to better ensure the anti-icing effect, improve the anti-dust erosion, anti-fouling effect and coating bonding strength, the coating thickness on the umbrella skirt can be a uniform thickness, and it can also be further preferred that the coating thickness at the root of the umbrella skirt is greater than the coating thickness at the edge of the umbrella skirt, which is more conducive to the anti-icing effect.

[0053] The utility model has a micro-nano binary composite rough structure based on the surface of the super-hydrophobic coating imitating lotus leaf, that is, a large number of micron-sized protrusions are distributed on the surface, and a large number of nano-scale protrusions are distributed on the micron-scale protrusions. This composite structure can make water droplets not wet the gap between the protrusions, so that the water droplets with a size much larger than this structure can only form point contacts on the protrusions across the air, and in this state, the water droplets have a very large contact angle and a smaller rolling angle, which is conducive to the rapid rolling off of the supercooled water droplets from the coating surface. The structure of the super-hydrophobic coating surface not only needs to form a binary micro-nano composite rough structure, but also needs to adopt a low surface energy material, when the surface tension of the low surface energy material is less than the surface tension of water, the water droplets are close to a sphere, and when the supercooled water droplets fall on the super-hydrophobic coating, it is difficult to stay on this coating surface, and before releasing its own latent heat, it can quickly roll off the surface. The utility model utilizes a fluorosilicone super-hydrophobic anti-icing coating, especially a fluorosilicone resin of a specific composition, combined with special thickness and structural settings, which greatly reduces the occurrence of icing, thereby reducing the reduction in the flashover voltage of the insulator caused by icing and the occurrence of ice disaster emergency repairs.

[0054] In principle, the present invention has no special restrictions on the coating of the ceramic core rod. Those skilled in the art can select and adjust according to the actual application, quality requirements and performance requirements. In order to better ensure the anti-icing effect, improve the anti-dust erosion, anti-fouling effect and coating bonding strength, the surface of the ceramic core rod is preferably compounded with a fluorosilicone resin anti-icing coating. The thickness of the anti-icing coating on the surface of the ceramic core rod of the present invention is preferably 1 to 15 mm, more preferably 3 to 13 mm, more preferably 5 to 11 mm, and more preferably 7 to 9 mm.

[0055] In the present invention, the parameters, materials and corresponding optimization principles of the fluorosilicone anti-icing coating composited on the surface of the porcelain core rod can correspond to those of the fluorosilicone anti-icing coating composited on the surface of the umbrella skirt, and will not be described one by one here.

[0056] See also Figure 1 , Figure 1 This is a schematic diagram of the structure of the super-hydrophobic anti-icing ceramic insulator provided by the utility model. 1 is the ceramic insulator body, and 2 is the super-hydrophobic anti-icing coating.

[0057] The above steps of the utility model provide an anti-icing electric porcelain post insulator, in which a fluorosilicone resin super-hydrophobic anti-icing coating is compounded on the surface of the insulator shed, which greatly reduces the adhesion between ice and the insulator shed and improves the hydrophobicity of the surface. In addition, combined with the special settings in structure and thickness, the reduction of the flashover voltage of the insulator caused by icing and the occurrence of ice disaster repairs are further reduced. At the same time, the anti-icing ceramic insulator compounded with the fluorosilicone resin anti-icing coating provided by the utility model has good bonding strength between the fluorosilicone resin anti-icing coating and the fluorosilicone resin, and is not easy to fall off.

[0058] The anti-icing ceramic insulator provided by the utility model greatly reduces the occurrence of icing, thereby reducing the reduction of the flashover voltage of the insulator caused by icing and the occurrence of ice disaster emergency repairs, and can also reduce the aging, cracking and chipping of the porcelain insulator itself caused by wind, sand and sun exposure. It has a simple structure and is more suitable for large-scale promotion and application.

[0059] In order to further illustrate the present invention, an anti-icing insulator provided by the present invention is described in detail below in combination with the embodiments. However, it should be understood that these embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are given only to further illustrate the features and advantages of the present invention, rather than to limit the claims of the present invention. The protection scope of the present invention is not limited to the embodiments described below.

[0060] Example 1

[0061] like Figure 1 shown.

[0062] A top-bound line support porcelain insulator with a height of 224 mm was selected, and a super-hydrophobic anti-icing coating of POSS cross-linked modified fluoroalkyl polysiloxane and vinyl polysiloxane was coated on the shed of the support porcelain insulator. The coating thickness was 5 mm. In terms of the overall coating thickness, the coating thickness at the root of the shed was equal to the coating thickness at the edge of the shed.

[0063] There is an inclined surface at the junction between the umbrella skirt and the porcelain core rod of the support porcelain insulator, and the angle between the inclined surface and the porcelain core rod is 30°.

[0064] The height of the support porcelain insulator is 222-370 mm.

[0065] The super-hydrophobic anti-icing ceramic insulator prepared in Example 1 of the present invention and the same ceramic insulator were subjected to water droplet and low-temperature freezing icing experiments.

[0066] The results show that the super-hydrophobic anti-icing ceramic insulator prepared by the present invention is significantly superior to the ceramic insulator without coating in terms of hydrophobicity and anti-icing performance.

[0067] Example 2

[0068] like Figure 1 shown.

[0069] A top-bound line support porcelain insulator with a height of 224 mm was selected, and a super-hydrophobic anti-icing coating of POSS cross-linked modified fluoroalkyl polysiloxane and vinyl polysiloxane was coated on the shed of the support porcelain insulator. The coating thickness was 5 mm. In terms of the overall coating thickness, the coating thickness at the root of the shed was greater than the coating thickness at the edge of the shed.

[0070] There is an inclined surface at the junction between the umbrella skirt and the porcelain core rod of the support porcelain insulator, and the angle between the inclined surface and the porcelain core rod is 30°.

[0071] The height of the support porcelain insulator is 222-370 mm.

[0072] The super-hydrophobic anti-icing ceramic insulator prepared in Example 2 of the present invention and the same ceramic insulator were subjected to water droplet and low-temperature freezing icing experiments.

[0073] The results show that the super-hydrophobic anti-icing ceramic insulator prepared by the present invention is significantly better than the ceramic insulator without coating in terms of hydrophobicity and anti-icing performance, and is improved compared with Example 1.

[0074] The above is a detailed introduction to an anti-icing electric porcelain post insulator provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and its core idea of ​​the utility model, including the best mode, and also enables any technician in the field to practice the utility model, including manufacturing and using any device or system, and implementing any combined method. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model. The scope of patent protection of the utility model is defined by the claims and may include other embodiments that can be thought of by those skilled in the art. If these other embodiments have structural elements that are not different from the text of the claims, or if they include equivalent structural elements that are not substantially different from the text of the claims, then these other embodiments should also be included in the scope of the claims.

Claims

1. An anti-icing insulator, characterized in that: Including shed skirt and porcelain core rod; The surface of the shed is compounded with a fluorosilicone resin anti-icing coating.

2. The anti-icing insulator according to claim 1, characterized in that: The thickness of the anti-icing coating on the surface of the shed is 1 to 15 mm; The anti-icing coating is a hydrophobic anti-icing coating.

3. The anti-icing insulator according to claim 1, characterized in that: The fluorosilicone resin is a fluorosilicone resin cross-linked by fluoroalkyl polysiloxane and vinyl polysiloxane.

4. The anti-icing insulator according to claim 3, characterized in that: The insulator comprises a post porcelain insulator; The fluorosilicone hydrophobic anti-icing coating has a slope at the junction of the shed and the porcelain core rod.

5. The anti-icing insulator according to claim 4, characterized in that: The fluorosilicone resin cross-linked by fluoroalkyl polysiloxane and vinyl polysiloxane is specifically POSS cross-linked modified fluoroalkyl polysiloxane and vinyl polysiloxane; The included angle between the inclined surface and the porcelain core rod is 10° to 60°.

6. The anti-icing insulator according to claim 4, characterized in that: The junction between the shed and the porcelain core rod includes the junction between the upper surface of the shed and the porcelain core rod, and / or the junction between the lower surface of the shed and the porcelain core rod; The coating thickness at the root of the shed is greater than or equal to the coating thickness at the edge of the shed.

7. The anti-icing insulator according to claim 4, characterized in that: The surface of the porcelain core rod is compounded with a fluorosilicone resin anti-icing coating; The thickness of the anti-icing coating on the surface of the porcelain core rod is 1 to 15 mm.

8. The anti-icing insulator according to claim 4, characterized in that: The pillar porcelain insulator is a top-binding type line pillar porcelain insulator; The height of the support porcelain insulator is 222-370 mm.

9. The anti-icing insulator according to any one of claims 1 to 8, characterized in that: The insulators include aluminum porcelain insulators and / or silicon porcelain insulators.

10. The anti-icing insulator according to claim 9, characterized in that: The aluminum porcelain insulator includes a high-aluminum porcelain insulator and / or a medium-aluminum porcelain insulator.

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