Stain-resistant suspension type porcelain insulator with multi-layer composite umbrella skirt structure

Abstract

The invention discloses a stain-resistant suspension type porcelain insulator with a multilayer composite umbrella skirt structure, which comprises a fixing piece and a connecting piece, and further comprises a top porcelain insulator and a plurality of middle porcelain insulators which are positioned between the fixing piece and the connecting piece, each of the top porcelain insulator and the middle porcelain insulators comprises a steel cap, a porcelain piece and a steel foot, and each middle porcelain insulator further comprises a lantern ring, a plurality of insulator bodies and a plurality of insulator bodies, the lantern ring is rotatably arranged on the steel cap; the plurality of decontamination sectors are arranged on the lantern ring at intervals in the circumferential direction, and the decontamination sectors are in contact with the porcelain piece; and the air groove is formed in the decontamination fan surface. According to the technical scheme, the decontamination sector is rotatably installed on the steel cap through the lantern ring, the bottom of the decontamination sector is made to make contact with the surface of a porcelain piece, the decontamination sector can be driven by wind power to rotate, and therefore the surface of the porcelain piece of the middle porcelain insulator is cleaned, excessive accumulation of dirt is avoided, and the possibility of pollution flashover is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of suspension insulators, in particular to a multi-layer composite shed structure anti-pollution suspension porcelain insulator. BACKGROUND

[0002] Suspension insulators are generally composed of porcelain parts, steel legs and steel caps bonded by insulating adhesive or mechanically clamped. Insulators are widely used in power systems and generally belong to external insulation, working in atmospheric conditions. The external live conductors of overhead transmission lines, power plants and busbars of substations and various electrical equipment must be supported by insulators and insulated from the ground or grounded objects.

[0003] If the insulator is seriously polluted and the surface of the insulator is fully wet, a strong local discharge phenomenon will occur, which is easy to cause a pollution flashover accident of the equipment. The pollution flashover accident threatens the safe and stable operation of the power system, which may affect the local power supply, and even cause the entire power grid to crack. The impact of pollution flashover on the power supply system has caused huge losses to the national economy.

[0004] In the prior art, a pollution flashover coating is compounded on the surface of the porcelain part to avoid the occurrence of pollution flashover accidents. However, with the development of China's national economy, air pollution is becoming increasingly serious, pollution sources are increasing in various places, and the salt density range is increasing year by year. In addition, there is a bird damage factor that is easy to induce pollution flashover. These factors have led to an increasing probability of pollution flashover accidents.

[0005] Therefore, it is an urgent technical problem to provide a multi-layer composite shed structure anti-pollution suspension porcelain insulator to reduce the probability of pollution flashover accidents. SUMMARY

[0006] The present application provides a multi-layer composite shed structure anti-pollution suspension porcelain insulator, which aims to solve the problem of increasing probability of pollution flashover accidents in the prior art.

[0007] To achieve the above-mentioned purpose, the present application provides a multi-layer composite shed structure anti-pollution suspension porcelain insulator, which comprises a fixing part and a connecting part, and further comprises a top-end porcelain insulator and a plurality of intermediate porcelain insulators between the fixing part and the connecting part. The top-end porcelain insulator and the intermediate porcelain insulator each comprise a steel cap, a porcelain part and a steel leg. The intermediate porcelain insulator further comprises a collar rotatably arranged on the steel cap, a plurality of pollution removal fan surfaces arranged at intervals in the circumferential direction on the collar, and a wind groove arranged on the pollution removal fan surface.

[0008] In some embodiments, the intermediate porcelain insulator further comprises: a clamping spring arranged on the steel cap; a spring arranged between the collar and the clamping spring; A rubber layer is arranged between the dirt-removing fan surface and the porcelain piece.

[0009] In some embodiments, the intermediate porcelain insulator further comprises: A plurality of first arc-shaped grooves are arranged on the inner side of the sleeve ring. A plurality of second arc-shaped grooves are arranged on the inner side of the elastic member. A plurality of third arc-shaped grooves are arranged on the clamping spring. An outer ring is arranged on the steel cap, and the outer ring and the steel cap form an annular groove accommodating the sleeve ring.

[0010] In some embodiments, the intermediate porcelain insulator further comprises: A sealing ring is arranged between the outer ring and the sleeve ring.

[0011] In some embodiments, the intermediate porcelain insulator further comprises: An annular protrusion is arranged on the bottom of the annular groove.

[0012] In some embodiments, the intermediate porcelain insulator further comprises: A through groove is arranged on the bottom of the sleeve ring and located in the annular groove.

[0013] In some embodiments, the intermediate porcelain insulator further comprises: A connecting protrusion is arranged on the elastic member. A connecting groove is arranged on the sleeve ring and matched with the connecting protrusion.

[0014] In some embodiments, the intermediate porcelain insulator further comprises: An isolation groove is arranged on the bottom of the plurality of dirt-removing fan surfaces, and the isolation grooves of the plurality of dirt-removing fan surfaces are arranged in a staggered manner.

[0015] In some embodiments, the intermediate porcelain insulator further comprises: A sliding groove is arranged on the upper surface of the porcelain piece. A sliding block is arranged on the bottom of the dirt-removing fan surface and matched with the sliding groove.

[0016] In some embodiments, the top porcelain insulator and the intermediate porcelain insulator both comprise: An insulating adhesive layer is arranged between the steel cap and the porcelain piece, and between the porcelain piece and the steel foot.

[0017] This application proposes a multi-layer composite umbrella-skirt structure for pollution-resistant suspension porcelain insulators. The insulator includes a fixing component and a connecting component, as well as a top porcelain insulator and multiple intermediate porcelain insulators located between the fixing component and the connecting component. Both the top and intermediate porcelain insulators include a steel cap, a porcelain component, and steel feet. The intermediate porcelain insulators further include: a collar rotatably mounted on the steel cap; multiple cleaning fans spaced circumferentially on the collar, contacting the porcelain component; and air ducts on the cleaning fans. The fixing component, top porcelain insulator, multiple intermediate porcelain insulators, and connecting component form the main structure of the multi-layer composite umbrella-skirt structure for pollution-resistant suspension porcelain insulators. The cleaning fans are rotatably mounted on the steel cap via the collar, with the bottom of the cleaning fans contacting the surface of the porcelain component. Driven by wind, the cleaning fans rotate, thereby cleaning the surface of the intermediate porcelain insulator, preventing excessive dirt accumulation, and reducing the possibility of flashover. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a three-dimensional structural diagram of a pollution-resistant suspension porcelain insulator with a multi-layer composite umbrella skirt structure in one embodiment of this application. Figure 2 This is a three-dimensional structural diagram of the intermediate porcelain insulator in one embodiment of this application; Figure 3 for Figure 2 Enlarged view of part A in the middle; Figure 4 This is a top view of the intermediate porcelain insulator in one embodiment of this application; Figure 5 for Figure 4 Enlarged view of part B in the middle; Figure 6 This is a cross-sectional view of the intermediate porcelain insulator in one embodiment of this application; Figure 7 for Figure 6 Enlarged view of a section in the middle C; Figure 8 for Figure 6 Enlarged view of a section in part D; Figure 9 This is a three-dimensional structural diagram of another intermediate porcelain insulator in one embodiment of this application.

[0019] In the diagram: 1. Fixing component; 2. Top porcelain insulator; 3. Middle porcelain insulator; 3. Steel cap; 31. Annular protrusion; 301. Opening; 32. Top component; 33. Snap ring; 34. Third arc groove; 341. Stainless steel fan; 35. Isolation groove; 351. Slider; 352. Air duct; 36. Slide groove; 37. Outer ring; 38. Porcelain component; 39. Collar; 310. First arc groove; 3101. Through groove; 3102. Insulating adhesive layer; 311. Umbrella rib; 312. Steel foot; 313. Sealing ring; 314. Recess; 3141. Elastic component; 315. Second arc groove; 3151. Connecting protrusion; 3152. Connecting component; 4. Wire; 5. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0022] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0023] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0024] See Figure 1 , Figure 2 and Figure 6As shown, this application proposes a multi-layer composite umbrella skirt structure pollution-resistant suspension porcelain insulator, including a fixing member 1 and a connecting member 4, and also includes a top porcelain insulator 2 and a plurality of intermediate porcelain insulators 3 located between the fixing member 1 and the connecting member 4. The top porcelain insulator 2 and the intermediate porcelain insulators 3 each include a steel cap 31, a porcelain part 39 and a steel foot 313. The intermediate porcelain insulators 3 further include: a collar 310, which is rotatably mounted on the steel cap 31; a plurality of pollution removal fan surfaces 35, which are circumferentially spaced on the collar 310 and contact the porcelain part 39; and a duct 36, which is provided on the pollution removal fan surface 35.

[0025] In this design, one end of the fixing member 1 is used to connect with the utility pole, and the other end of the fixing member 1 is connected to the steel cap 31 of the top porcelain insulator 2. One end of the connecting member 4 is connected to the steel foot 313 of the bottom middle porcelain insulator 3, and the other end of the connecting member 4 is connected to the wire 5. Both the fixing member 1 and the connecting member 4 are mature existing technologies, and their structures are not specifically limited here.

[0026] The steel cap 31 has a connecting hole, and an opening 32 on one side. One end of the steel foot 313 is connected to the porcelain part 39, and the other end of the steel foot 313 has an enlarged head that enters the connecting hole through the opening 32, thereby forming a connection between the top porcelain insulator 2 and the middle porcelain insulator 3, or a connection between two adjacent middle porcelain insulators 3. The steel cap 31 has a locking hole, into which a top member 33 is inserted. The top member 33 is used to lift the steel foot 313 and prevent it from slipping out of the opening 32.

[0027] Among them, the top porcelain insulator 2 is frequently washed by rainwater, and dirt does not easily accumulate on the top porcelain insulator 2. However, the middle porcelain insulator 3 is less frequently washed by rainwater, and dirt easily accumulates on the middle porcelain insulator 3. In drizzle, fog, dew and other weather conditions, the dirt becomes damp, which greatly reduces the insulation level of the surface of the middle porcelain insulator 3, causing surface flashover to form on the surface of the middle porcelain insulator 3, or even forming a through discharge channel, resulting in power transmission interruption. Therefore, it is necessary to set a dirt removal structure on the surface of the porcelain part 39 of the middle porcelain insulator 3.

[0028] Among them, the collar 310 and the cleaning fan 35 are the core structures of the multi-layer composite umbrella skirt structure pollution-resistant suspension porcelain insulator. The collar 310 can be slipped down from the end of the steel cap 31 with the opening 32 until the lower end face of the collar 310 abuts against the steel cap 31. At this time, the interface rotatably installs the collar 310 onto the steel cap 31. The cleaning fan 35 is integrally formed with the collar 310. The cleaning fan 35 can rotate under the drive of the wind, thereby cleaning the dirt on the cleaning fan 35, avoiding excessive accumulation of dirt, and reducing the possibility of flashover. Furthermore, because the top porcelain insulator 2 and the middle porcelain insulator 3 are suspended at a high height with fewer surrounding obstructions and better wind resources, and the setting of the wind duct 36 also facilitates the rotation of the cleaning fan 35 under the drive of the wind, the cleaning fan 35 has a strong cleaning efficiency.

[0029] Specifically, the main structure of the pollution-resistant suspension porcelain insulator consists of a multi-layer composite umbrella skirt structure, comprising the fixing component 1, the top porcelain insulator 2, multiple intermediate porcelain insulators 3, and the connecting component 4. The cleaning fan 35 is rotatably mounted onto the steel cap 31 via the collar 310, with the bottom of the cleaning fan 35 contacting the surface of the porcelain component 39. Driven by wind, the cleaning fan 35 rotates, thereby cleaning the surface of the porcelain component 39 of the intermediate porcelain insulators 3, preventing excessive accumulation of dirt, and thus reducing the possibility of flashover.

[0030] The collar 310 and the cleaning fan 35 are both made of polyimide. The polyimide collar 310 and the cleaning fan 35 are lightweight, have excellent mechanical properties and corrosion resistance, which is beneficial for the collar 310 and the cleaning fan 35 to work in harsh outdoor environments.

[0031] See Figure 2 , Figure 4 , Figure 6 and Figure 8 As shown, in some embodiments, the intermediate porcelain insulator 3 further includes: a retaining spring 34, which is disposed on a steel cap 31; the steel cap 31 is provided with a retaining groove for the retaining spring 34 to be installed; the retaining spring 34 is generally C-shaped, and one end of the retaining spring 34 is provided with an opening 32; the retaining spring 34 can deform to be inserted into the retaining groove. An elastic element 315 is disposed between the retaining spring 34 and the collar 310; the retaining spring 34 can compress the elastic element 315 and transmit the pressure to the collar 310 through the elastic element 315, thereby pressing the cleaning fan 35 against the surface of the porcelain part 39, enhancing the cleaning ability of the cleaning fan 35. A rubber layer is disposed between the cleaning fan 35 and the porcelain part 39. The rubber layer is used to form a soft contact between the cleaning fan 35 and the surface of the porcelain part 39, avoiding damage to the porcelain part 39 by the cleaning fan 35.

[0032] In this application, the surface of the ceramic component 39 is provided with an anti-flashover coating. To improve the cleaning effect, pressure is provided by the retaining spring 34 and the elastic element 315, allowing the cleaning fan 35 to press against the surface of the ceramic component 39, increasing the contact force between the cleaning fan 35 and the surface of the ceramic component 39. This results in a better cleaning effect as the cleaning fan 35 rotates. The rubber layer is made of silicone rubber, and the elastic element 315 is made of thermoplastic elastomer (TPV). Thermoplastic elastomers are heat and cold resistant, have excellent elasticity, are resistant to aging, ozone, and have high tear strength and chemical resistance, and excellent coloring properties. They can be used for extended periods in temperatures between -60℃ and +135℃, which is beneficial for the use of the elastic element 315 in harsh outdoor environments.

[0033] The top of the elastic element 315 is provided with a graphene coating. The graphene coating helps to reduce the friction between the elastic element 315 and the retaining spring 34, which helps to reduce the difficulty of rotating the cleaning fan 35, making the cleaning fan 35 easier to rotate and reducing the probability of flashover.

[0034] See Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, in some embodiments, the intermediate porcelain insulator 3 further includes: a plurality of first arc-shaped grooves 3101, which are spaced apart on the inner side of the collar 310; a plurality of second arc-shaped grooves 3151, which are spaced apart on the inner side of the elastic member 315; and a plurality of third arc-shaped grooves 341, which are spaced apart on the retaining spring 34. The first arc-shaped grooves 3101, second arc-shaped grooves 3151, and third arc-shaped grooves 341 have the same cross-section. The arrangement of the first arc-shaped grooves 3101, second arc-shaped grooves 3151, and third arc-shaped grooves 341 helps to reduce the contact area between the collar 310 and the elastic member 315 and the steel cap 31, thereby reducing the difficulty of rotating the cleaning fan 35, making the cleaning fan 35 easier to rotate, and reducing the probability of flashover. An outer ring 38 is disposed on the steel cap 31, and the outer ring 38 and the steel cap 31 enclose an annular groove that accommodates part of the collar 310. The outer ring 38 effectively improves the stability of the cleaning fan 35. The outer ring 38 and the steel cap 31 are integrally formed. Rainwater seeping into the annular groove helps reduce the friction between the collar 310 and the steel cap 31, making the cleaning fan 35 easier to rotate and reducing the probability of flashover.

[0035] In this embodiment, three arc-shaped grooves 3101, 3151, and 341 are provided, evenly spaced along the circumference. In actual use, rainwater can fall from the third arc-shaped groove 341 into the space between the retaining ring 34 and the steel cap 31, and then enter the first arc-shaped groove 3101 along the second arc-shaped groove 3151, cleaning the contact surface between the collar 310 and the steel cap 31. Dust on the wall surface is deposited on the contact surface between the collar 310 and the steel cap 31, affecting the coefficient of friction between the collar 310 and the steel cap 31. Rainwater also helps to lubricate the contact surface between the collar 310 and the steel cap 31, reducing friction and making the cleaning fan 35 easier to rotate, thus reducing the probability of flashover.

[0036] Preferably, the cross-sectional areas of the first arc-shaped groove 3101, the second arc-shaped groove 3151, and the third arc-shaped groove 341 gradually increase to increase their volume, enabling them to better store rainwater. The small opening at the top also helps to reduce the evaporation rate of rainwater, allowing rainwater to be stored for a longer period of time.

[0037] See Figure 6 and Figure 7 As shown, in some embodiments, the intermediate porcelain insulator 3 further includes a sealing ring 314, which is provided between the outer ring 38 and the collar 310. The sealing ring 314 is used to form a seal between the outer ring 38 and the collar 310. In actual use, rainwater is impregnated in the annular groove. Alternatively, when the intermediate porcelain insulator 3 is installed in place, pure water can be injected into the first arc groove 3101, the second arc groove 3151, and the third arc groove 341. The sealing ring 314 is provided on the outside of the collar 310 to prevent water from leaking out from that side.

[0038] In this embodiment, the bottom of the sealing ring 314 is provided with an inwardly recessed recess 3141. The recess 3141 can increase the sealing path. Since the liquid level in the first arc groove 3101 inside the collar 310 may be much higher than the liquid level outside the collar 310, water pressure is always present on one side of the sealing ring 314. Increasing the sealing path by the recess 3141 can effectively prevent water leakage and also prevent water from continuously flowing from this side onto the ceramic part 39.

[0039] See Figure 6 and Figure 7As shown, in some embodiments, the intermediate porcelain insulator 3 further includes an annular protrusion 301, which is provided at the bottom of the annular groove. The bottom of the collar 310 is an annular plane, resulting in a line contact between the collar 310 and the annular protrusion 301, reducing the frictional resistance experienced by the annular protrusion 301. A gap exists between the annular protrusion 301 and the bottom of the collar 310, where injected pure water or rainwater can be stored, increasing the water storage volume. Furthermore, dust washed off the contact surface between the collar 310 and the steel cap 31 can accumulate in this gap, preventing dust from affecting the rotation of the collar 310 and reducing the probability of flashover.

[0040] See Figure 6 and Figure 7 As shown, in some embodiments, the intermediate porcelain insulator 3 further includes a through groove 3102. The bottom of the collar 310 is provided with the through groove 3102, which is located within the annular groove. The bottom of the collar 310 is provided with through grooves 3102 at intervals. The through grooves 3102 allow the spaces inside and outside the collar 310 to communicate, and the through grooves 3102 help reduce the contact area between the collar 310 and the annular protrusion 301, thereby reducing the frictional resistance experienced by the collar 310.

[0041] See Figure 6 and Figure 8 As shown, in some embodiments, the intermediate porcelain insulator 3 further includes: connecting protrusions 3152, which are spaced apart from the elastic member 315; and connecting grooves, with the collar 310 having connecting grooves adapted to the connecting protrusions 3152. The bottom end of the elastic member 315 is provided with connecting protrusions 3152, preferably multiple connecting protrusions 3152 spaced apart, and the top end of the collar 310 is provided with connecting grooves. By inserting the connecting protrusions 3152 into the connecting grooves, the elastic member 315 can rotate together with the collar 310.

[0042] In this embodiment, the third arc-shaped groove 341 may be misaligned with the first arc-shaped groove 3101 and the second arc-shaped groove 3151. When the third arc-shaped groove 341 is completely misaligned with the first arc-shaped groove 3101 and the second arc-shaped groove 3151, it is beneficial to preserve the water stored in the first arc-shaped groove 3101 and the second arc-shaped groove 3151. When the third arc-shaped groove 341 partially overlaps with the first arc-shaped groove 3101 and the second arc-shaped groove 3151, it is beneficial for rainwater to enter the first arc-shaped groove 3101 and the second arc-shaped groove 3151.

[0043] like Figure 2 , Figure 3 and Figure 9As shown, in some embodiments, the intermediate porcelain insulator 3 further includes: an isolation groove 351, with the bottom of multiple cleaning fan surfaces 35 spaced apart, and the isolation grooves 351 of the multiple cleaning fan surfaces 35 being staggered. During rotation, the cleaning fan surfaces 35 clean the dirt on the porcelain component 39. Some dirt is thrown off the surface of the porcelain component 39, while some dirt adheres to the cleaning fan surfaces 35. The design of the isolation grooves 351 avoids the formation of a through-discharge channel at the bottom of the cleaning fan surfaces 35. Preferably, there are two cleaning fan surfaces 35, with the isolation grooves 351 on the two cleaning fan surfaces 35 being staggered, ensuring that the entire upper surface of the porcelain component 39 can be cleaned by just two cleaning fan surfaces 35.

[0044] like Figure 2 , Figure 3 and Figure 9 As shown, in some embodiments, the intermediate porcelain insulator 3 further includes: a groove 37, with the upper surface of the porcelain component 39 having a groove 37; and a slider 352, with the bottom of the cleaning fan 35 having a slider 352 adapted to the groove 37. The cooperation between the groove 37 and the slider 352 improves the stability of the cleaning fan 35 during rotation. The groove 37 is an annular groove, and the sliders 352 on the two cleaning fan 35s combine to form an annular slider 352. The annular slider 352 is adapted to the groove 37 to ensure the surface shape of the porcelain component 39 and prevent water accumulation in the groove 37.

[0045] In this embodiment, a middle slider 352 is also provided. The thickness of the slider 352 is the same as the thickness of the cleaning fan surface 35. This can reduce the friction between the cleaning fan surface 35 and the surface of the ceramic part 39, so that the cleaning fan surface 35 can rotate more easily and reduce the probability of flashover.

[0046] The lower end of the ceramic component 39 is also provided with multiple umbrella ridges 312 at intervals. The multiple umbrella ridges 312 can effectively increase the strength of the ceramic component 39. The circumferential position of the groove 37 is the same as the circumferential position of one umbrella ridge 312, ensuring the structural strength of the ceramic component 39.

[0047] In some embodiments, both the top porcelain insulator 2 and the middle porcelain insulator 3 include an insulating adhesive layer 311, an insulating adhesive layer 311 is provided between the steel cap 31 and the porcelain component 39, and an insulating adhesive layer 311 is provided between the porcelain component 39 and the steel foot 313. The insulating adhesive layer 311 is preferably cement.

[0048] The above description is only a part or preferred embodiment of this application. Neither the text nor the drawings should limit the scope of protection of this application. All equivalent structural transformations made using the content of this application's specification and drawings under the overall concept of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. A pollution-resistant suspension porcelain insulator with a multi-layer composite umbrella skirt structure, comprising a fixing member (1) and a connecting member (4), characterized in that, It also includes a top porcelain insulator (2) and a plurality of intermediate porcelain insulators (3) located between the fixing member (1) and the connecting member (4). The top porcelain insulator (2) and the intermediate porcelain insulators (3) each include a steel cap (31), a porcelain part (39), and a steel foot (313). The intermediate porcelain insulators (3) further include: A collar (310) is rotatably disposed on the steel cap (31). Multiple cleaning fan surfaces (35) are arranged circumferentially at intervals on the collar (310), and the cleaning fan surfaces (35) contact the ceramic piece (39). Air duct (36), the air duct (36) is provided on the dirt removal fan surface (35).

2. The pollution-resistant suspension porcelain insulator with a multi-layer composite umbrella skirt structure according to claim 1, characterized in that, The intermediate porcelain insulator (3) also includes: A retaining ring (34) is disposed on the steel cap (31); Elastic element (315), the elastic element (315) is disposed between the collar (310) and the snap ring (34); A rubber layer is provided between the cleaning fan surface (35) and the ceramic part (39).

3. The pollution-resistant suspension porcelain insulator with a multi-layer composite umbrella skirt structure according to claim 2, characterized in that, The intermediate porcelain insulator (3) also includes: Multiple first arc-shaped grooves (3101) are spaced apart on the inner side of the collar (310); Multiple second arc-shaped grooves (3151) are provided on the inner side of the elastic member (315) at intervals. Multiple third arc-shaped grooves (341) are provided on the retaining rings (34) at intervals; Outer ring (38), the outer ring (38) is disposed on the steel cap (31), the outer ring (38) and the steel cap (31) enclose to form an annular groove for accommodating part of the collar (310).

4. The pollution-resistant suspension porcelain insulator with a multi-layer composite umbrella skirt structure according to claim 3, characterized in that, The intermediate porcelain insulator (3) also includes: A sealing ring (314) is provided between the outer ring (38) and the collar (310).

5. The pollution-resistant suspension porcelain insulator with a multi-layer composite umbrella skirt structure according to claim 3, characterized in that, The intermediate porcelain insulator (3) also includes: An annular protrusion (301) is provided at the bottom of the annular groove.

6. The pollution-resistant suspension porcelain insulator with a multi-layer composite umbrella skirt structure according to claim 3, characterized in that, The intermediate porcelain insulator (3) also includes: The through groove (3102) is provided at the bottom of the collar (310), and the through groove (3102) is located in the annular groove.

7. The pollution-resistant suspension porcelain insulator with a multi-layer composite umbrella skirt structure according to claim 2, characterized in that, The intermediate porcelain insulator (3) also includes: Connecting protrusions (3152) are spaced apart from the elastic member (315); The collar (310) is provided with a connecting groove that is adapted to the connecting protrusion (3152).

8. The pollution-resistant suspension porcelain insulator with a multi-layer composite umbrella skirt structure according to claim 1, characterized in that, The intermediate porcelain insulator (3) also includes: Isolation groove (351), the bottom of the plurality of cleaning fan surfaces (35) are provided with the isolation groove (351) at intervals, and the isolation groove (351) of the plurality of cleaning fan surfaces (35) are staggered.

9. The pollution-resistant suspension porcelain insulator with a multi-layer composite umbrella skirt structure according to claim 1, characterized in that, The intermediate porcelain insulator (3) also includes: The upper surface of the ceramic piece (39) is provided with a groove (37). The bottom of the cleaning fan (35) is provided with a slider (352) adapted to the slide groove (37).

10. The pollution-resistant suspension porcelain insulator with a multi-layer composite umbrella skirt structure according to claim 1, characterized in that, Both the top porcelain insulator (2) and the middle porcelain insulator (3) include: An insulating adhesive layer (311) is provided between the steel cap (31) and the ceramic part (39), and between the ceramic part (39) and the steel foot (313).

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