Insulator structure for high voltage transformer and manufacturing method thereof

Abstract

The present invention provides an insulator structure for a high-voltage transformer applied in the technical field of high-voltage transformers. The present invention also relates to a method for manufacturing the insulator structure for a high-voltage transformer. The upper porcelain sleeve (2) and the lower porcelain sleeve (3) of the insulator structure for a high-voltage transformer are sleeved on a bolt (1). The upper end of the upper porcelain sleeve (2) is fitted on a sealing ring I (4) sleeved on the bolt (1). The sealing ring I (4) rests on a limit platform (10). The upper end of the lower porcelain sleeve (3) extends into the upper porcelain sleeve (2). A nut (6) is screwed onto the lower part of the lower porcelain sleeve (3). An oil passage (9) is provided at the lower end of the bolt (1). The oil passage (9) is connected to a gap (11). The insulator structure for a high-voltage transformer and the manufacturing method thereof ensure that the insulator has a good high-voltage insulation effect and is not easy to break down. The insulator also avoids the occurrence of transformer oil leakage causing the leakage of transformer oil to contaminate the equipment, thereby reducing the complexity of transformer cleaning.

Description

Technical Field

[0001] The present invention belongs to the technical field of high-voltage transformers, and more specifically, relates to an insulator structure for a high-voltage transformer. The present invention also relates to a method for manufacturing the insulator structure for a high-voltage transformer. Background Art

[0002] With the advancement of science and technology, solid-state pulse modulators have become widely used in microwave sources for electron accelerators, radar transmitters, and security inspection and flaw detection equipment. The high-voltage transformers used in these applications are typically oil-immersed, with the high-voltage output of these transformers routed through insulators to meet insulation requirements. During insulator assembly, due to variations in assembly methods, materials, and process methods, transformers are prone to problems such as loose insulators, oil leakage, and high-voltage insulation issues.

[0003] Conventional transformers are in a static state during use, and the insulators are not subjected to oil pressure, so the above problems cannot be fed back. When the transformer is in motion, the insulators are subjected to oil pressure. As the working time increases, the sealing ring will age in the oil, the sealing effect of the insulator will deteriorate, and oil leakage and loose insulators will gradually appear, eventually leading to poor high-voltage insulation and breakdown. In addition, due to the leakage of transformer oil, the leaked transformer oil will contaminate the equipment, which will be very troublesome to clean up. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in view of the shortcomings of the existing technology, an insulator with a simple structure is provided, which is manufactured by a special process method, thereby effectively reducing the problems of poor sealing effect, oil leakage, loosening of the insulator in the existing technology, and ultimately ensuring that the insulator has good high-voltage insulation effect and is not easy to be broken down, and avoiding the leakage of transformer oil due to transformer oil leakage to contaminate the equipment, reducing the complexity of transformer cleaning, and thus comprehensively improving the performance of the insulator structure for high-voltage transformers.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is:

[0006] The present invention discloses an insulator structure for a high-voltage transformer, comprising a bolt, wherein a limit platform is provided near the upper end of the bolt, an upper porcelain sleeve and a lower porcelain sleeve are sleeved on the bolt, the upper end of the upper porcelain sleeve is fitted on a sealing ring I fitted on the bolt, the sealing ring I rests on the limit platform, the upper end of the lower porcelain sleeve extends into the upper porcelain sleeve, a gap is formed between the lower porcelain sleeve extending into the upper porcelain sleeve and the upper porcelain sleeve, a nut is screwed onto the lower part of the lower porcelain sleeve, an oil tank cover is sleeved on the lower porcelain sleeve, the upper end of the oil tank cover is fitted on the sealing ring II fitted on the lower porcelain sleeve, the sealing ring II is fitted on the lower end of the upper porcelain sleeve, the lower end of the oil tank cover is fitted on the limit surface of the lower porcelain sleeve, an oil channel is provided at the lower end of the bolt, and the oil channel is connected to the gap.

[0007] The upper porcelain sleeve is configured to have an N-shaped cross-section, and the diameter of the upper end face of the upper porcelain sleeve is configured to be smaller than the diameter of the lower end face of the upper porcelain sleeve; the upper end of the lower porcelain sleeve is configured to have a conical structure with a diameter gradually increasing from top to bottom.

[0008] The upper end of the bolt of the high-voltage transformer insulator structure is provided with an upper threaded portion, on which a ball nut is screwed, and the lower end of the bolt is provided with a lower threaded portion, on which the nut is screwed, and a steel paper flat washer I is also sleeved on the lower threaded portion and located between the nut and the lower end of the lower porcelain sleeve.

[0009] A steel paper flat washer II is also mounted on the bolt, and the steel paper flat washer II is arranged as a structure located between the lower end surface of the fuel tank cover and the upper surface of the lower porcelain sleeve.

[0010] When the high-voltage transformer insulator structure is used, the high-voltage transformer insulator structure is located below the oil tank cover and is configured to be immersed in transformer oil.

[0011] The bolt is configured as a structure processed by turning round steel, and a colored zinc electroplating layer is provided on the surface of the bolt.

[0012] The upper porcelain sleeve and the lower porcelain sleeve are configured as structures made of fired ceramics, and creepage grooves are respectively provided on the outer surfaces of the upper porcelain sleeve and the lower porcelain sleeve.

[0013] The sealing ring I and the sealing ring II are both made of fluorine-containing oil-resistant rubber plates.

[0014] The present invention also provides a method for manufacturing an insulator structure for a high-voltage transformer with simple steps and a special process method, thereby effectively reducing the problems of poor sealing effect, oil leakage, loosening of the insulator in the prior art, and ultimately ensuring that the insulator has good high-voltage insulation effect and is not prone to breakdown, and avoiding the leakage of transformer oil that may contaminate the equipment, thereby reducing the complexity of transformer cleaning, and thus comprehensively improving performance. The insulator structure manufacturing method comprises:

[0015] 1) Clean the oil stains on the sealing ring I, sealing ring II, bolts and nuts, dry them after cleaning and set aside. Use running water to rinse the dust and stains on the upper and lower porcelain sleeves and dry them;

[0016] 2) Install the bolts, sealing ring I, upper porcelain sleeve, and sealing ring II on the top of the fuel tank cover. Install the steel paper flat washer II, lower porcelain sleeve, steel paper flat washer I, and nuts on the bottom of the fuel tank cover. Tighten the nuts for the first tightening.

[0017] 3) Place the assembled high-voltage transformer insulator structure in a blast drying oven, heat it to 90℃~95℃, keep it warm for 3h-4h, take it out and tighten the nut while it is hot for the second tightening. When it is cooled to room temperature, tighten the nut for the third tightening to complete the production of the high-voltage transformer insulator structure.

[0018] When cleaning the sealing rings I and II, check whether the sealing rings I and II are damaged, and remove them if necessary.

[0019] The technical solution of the present invention can achieve the following beneficial effects:

[0020] The high-voltage transformer insulator structure and manufacturing method described in this invention utilize improvements to its structure and manufacturing method based on the oil-immersed operating environment of the insulator. This improves the insulator's sealing function during oil immersion, preventing oil intrusion. Furthermore, it enhances insulation performance, extending the service life of various components and reducing the need for frequent maintenance and replacement. During the insulator structure fabrication, clean the oil stains from sealing ring I, sealing ring II, bolts, and nuts, then dry them for later use. Rinse the upper and lower porcelain sleeves with running water to remove dust and stains, then dry them. Install the bolts, sealing ring I, upper porcelain sleeve, and sealing ring II above the fuel tank cover. Assemble the steel paper flat washer II, lower porcelain sleeve, steel paper flat washer I, and nuts below the fuel tank cover. Tighten the nuts for the first tightening. Place the assembled high-voltage transformer insulator structure in a blast drying oven, heat it to 90°C-95°C, and hold it for 3-4 hours. Remove it from the oven, tighten the nuts while hot for a second tightening, and allow it to cool to room temperature before tightening the nuts for a third tightening. In this structure, an oil channel is provided at the lower end of the bolt. During the vacuum oil filling process, transformer oil can be drawn into the gap (crevice) between the upper and lower porcelain sleeves, effectively improving the insulating performance of the insulator. In the above structure, the upper and lower porcelain sleeves are sealed and protected by sealing rings, ensuring that the porcelain sleeves will not be damaged during the tightening process of the nut and that a seal is achieved after compression. The high-voltage transformer insulator structure and manufacturing method described in the present invention utilize a unique process to manufacture the insulator, effectively reducing the problems of poor sealing, oil leakage, and loosening insulators in the prior art. Ultimately, the insulator ensures good high-voltage insulation and is not prone to breakdown. It also prevents transformer oil leakage from contaminating equipment, reduces the complexity of transformer cleaning, and comprehensively improves performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The following is a brief description of the contents and symbols in the drawings of this specification:

[0022] Figure 1 This is a schematic cross-sectional view of the insulator structure for a high-voltage transformer according to the present invention;

[0023] Figure 2 This is a schematic cross-sectional view of a bolt of an insulator structure for a high-voltage transformer according to the present invention;

[0024] Figure 3 This is a schematic structural diagram of the upper porcelain sleeve and the lower porcelain sleeve of the insulator structure for a high-voltage transformer according to the present invention when they are matched;

[0025] The marks in the accompanying drawings are: 1. bolt; 2. upper porcelain sleeve; 3. lower porcelain sleeve; 4. sealing ring I; 5. steel paper flat washer I; 6. nut; 7. ball head nut; 8. fuel tank cover; 9. oil channel; 10. limit platform; 11. gap; 12. sealing ring II; 13. limit surface; 14. upper threaded part; 15. lower threaded part; 16. steel paper flat washer II; 17. creepage groove. DETAILED DESCRIPTION

[0026] The following describes the embodiments with reference to the accompanying drawings to further explain in detail the specific embodiments of the present invention, such as the shapes, structures, mutual positions and connection relationships between the various components involved, the functions and working principles of the various components.

[0027] As attached Figure 1 -Attached Figure 3As shown, the present invention is an insulator structure for a high-voltage transformer, comprising a bolt 1, a stopper 10 provided near the upper end of the bolt 1, an upper porcelain sleeve 2 and a lower porcelain sleeve 3 fitted onto the bolt 1, the upper end of the upper porcelain sleeve 2 abutting against a sealing ring I4 fitted onto the bolt 1, the sealing ring I4 abutting against the stopper 10, the upper end of the lower porcelain sleeve 3 extending into the upper porcelain sleeve 2, forming a gap 11 between the lower porcelain sleeve 3 extending into the upper porcelain sleeve 2 and the upper porcelain sleeve 2, a nut 6 being screwed onto the lower portion of the lower porcelain sleeve 3, an oil tank cover 8 fitted onto the lower porcelain sleeve 3, the upper end of the oil tank cover 8 abutting against a sealing ring II 12 fitted onto the lower porcelain sleeve 3, the sealing ring II 12 abutting against the lower end of the upper porcelain sleeve 2, the lower end of the oil tank cover 8 abutting against a stopper surface 13 of the lower porcelain sleeve 3, and an oil passage 9 provided at the lower end of the bolt 1, communicating with the gap 11. The structure of the present invention is improved based on the working environment of the insulator being immersed in oil during operation, and its manufacturing method is improved. In this way, on the one hand, the sealing function is achieved when immersed in oil to prevent oil from entering, and on the other hand, the insulation function and insulation performance are improved. In addition, the service life of each component can be extended, and frequent maintenance and replacement are not required. When making the insulator structure, clean the oil stains on the sealing ring I4, the sealing ring II12, the bolt 1, and the nut 6, dry them after cleaning, and use running water to rinse the dust and stains on the upper porcelain sleeve 2 and the lower porcelain sleeve 3, and dry them; install the bolt 1, the sealing ring I4, the upper porcelain sleeve 2, and the sealing ring II12 on the top of the oil tank cover 8, and assemble the steel paper flat washer II16, the lower porcelain sleeve 3, the steel paper flat washer I5, and the nut 6 below the oil tank cover 8, tighten the nut 6 for the first tightening; put the assembled high-voltage transformer insulator structure into a blast drying oven, heat it to 90℃~95℃, keep it warm for 3h-4h, take it out and tighten the nut 6 while it is hot for the second tightening, and when it is cooled to room temperature, tighten the nut 6 for the third tightening, and the production of the high-voltage transformer insulator structure is completed. In the above structure, an oil channel is provided at the lower end of the bolt. During vacuum oil filling, transformer oil can be drawn into the gap (crevice) between the upper and lower porcelain sleeves, effectively improving the insulation performance of the insulator. In the above structure, the upper and lower porcelain sleeves are sealed and protected by sealing rings, ensuring that the porcelain sleeves will not be damaged during the tightening of the nut and that sealing can be achieved after compression. The high-voltage transformer insulator structure and its manufacturing method described in the present invention utilize a special process to manufacture the insulator, thereby effectively reducing the problems of poor sealing effect, oil leakage, and loose insulators in the prior art. Ultimately, the insulator ensures good high-voltage insulation and is not prone to breakdown. It also avoids the risk of transformer oil leakage causing equipment contamination, reduces the complexity of transformer cleaning, and thus comprehensively improves performance.

[0028] The upper porcelain sleeve 2 is configured with an N-shaped cross-section, with the diameter of its upper end smaller than that of its lower end. The upper end of the lower porcelain sleeve 3 is configured as a tapered structure with its diameter gradually increasing from top to bottom. This structure allows the lower porcelain sleeve to extend into the interior of the upper porcelain sleeve, creating a gap between the upper and lower porcelain sleeves. Oil passages are provided on the bolts, and the bolts and nuts cooperate to facilitate and reliably connect the lower and upper porcelain sleeves. Repeated tightening ensures a secure connection between the upper and lower porcelain sleeves, preventing damage to the upper and lower porcelain sleeves. This improves the sealing performance of the insulator and prevents loosening.

[0029] The bolt 1 of the high-voltage transformer insulator structure has an upper threaded portion 14 at its upper end, which is threaded with a ball nut 7. The bolt 1 has a lower threaded portion 15 at its lower end, onto which a nut 6 is threaded. A flat steel paper washer 15 is also fitted onto the lower threaded portion 15, positioned between the nut 6 and the lower end of the lower porcelain sleeve 3. In this structure, the provision of the flat steel paper washer 15 provides a buffer during nut tightening, preventing damage to the lower porcelain sleeve. The flat steel paper washer 1 absorbs transformer oil, improving insulation performance. Since the lower porcelain sleeve is immersed in transformer oil and does not require sealing, the flat steel paper washer 1 is sufficient for protection.

[0030] The ball nut described in the present invention can effectively prevent tip discharge during high-voltage processes. The nut and the ball nut cooperate to achieve double-nut locking, which can effectively prevent the nut from loosening in various environments. Threads are provided at the upper and lower ends of the bolt, the upper end is an external thread, and the lower end is a thread connected to the high voltage of the transformer. An oil channel is provided at the lower end of the bolt to ensure that the transformer oil can penetrate into the gap between the upper porcelain sleeve and the lower porcelain sleeve through the oil channel, thereby improving the insulation performance. The diameter of the upper thread of the bolt is smaller than that of the lower thread, ensuring that when the upper thread is externally connected, the nut tightening torque is smaller than that of the lower end, thereby preventing the bolt from rotating when the upper nut is tightened.

[0031] The bolt 1 is also provided with a steel paper flat washer II 16, which is positioned between the lower end surface of the oil tank cover 8 and the upper surface of the lower porcelain sleeve 3. The above-mentioned structure and the arrangement of the steel paper flat washer II can provide a buffer during the tightening of the nut, thereby preventing the lower porcelain sleeve from being damaged. Furthermore, the steel paper flat washer II can absorb transformer oil in the transformer oil, thereby improving its insulation performance.

[0032] When the high-voltage transformer insulator structure is used, the high-voltage transformer insulator structure is located below the oil tank cover 8 and is configured to be immersed in transformer oil.

[0033] The bolt 1 is configured to be machined from round steel, and a colored zinc electroplating layer is provided on the surface of the bolt 1. The above structure and the colored zinc electroplating layer on the surface of the bolt can prevent oxidation and rust.

[0034] The upper and lower porcelain sleeves 2 and 3 are constructed of fired ceramic, with creepage grooves 17 provided on their outer surfaces. In this structure, both the upper and lower porcelain sleeves are constructed of fired ceramic, resulting in low cost and simple processing. The external creepage grooves increase the creepage distance.

[0035] Both sealing ring I4 and sealing ring II12 are constructed from fluorine-containing, oil-resistant rubber sheets. This structure, in which the sealing rings are made from fluorine-containing, oil-resistant rubber sheets, allows for long-term use in transformer oil without aging, extending the transformer's service life. The sealing rings seal and protect the upper and lower porcelain sleeves, ensuring they are protected from damage during tightening and providing a reliable seal.

[0036] The present invention also provides a method for manufacturing an insulator structure for a high-voltage transformer with simple steps and a special process method, thereby effectively reducing the problems of poor sealing effect, oil leakage, loosening of the insulator in the prior art, and ultimately ensuring that the insulator has good high-voltage insulation effect and is not prone to breakdown, and avoiding the leakage of transformer oil that may contaminate the equipment, thereby reducing the complexity of transformer cleaning, and thus comprehensively improving performance. The insulator structure manufacturing method comprises:

[0037] 1) Clean oil stains from sealing ring I4, sealing ring II12, bolt 1, and nut 6, then dry them for later use. Rinse dust and stains from upper and lower porcelain sleeves 2 and 3 with running water and allow them to dry. 2) Install bolt 1, sealing ring I4, upper porcelain sleeve 2, and sealing ring II12 above the fuel tank cover 8. Install steel paper flat washer II16, lower porcelain sleeve 3, steel paper flat washer I5, and nut 6 below the fuel tank cover 8. Tighten nut 6 for the first tightening. 3) Place the assembled high-voltage transformer insulator structure in a forced-air drying oven, heat to 90°C to 95°C, and maintain the temperature for 3-4 hours. Remove the assembled structure and tighten nut 6 while hot for a second tightening. After cooling to room temperature, tighten nut 6 for a third tightening, completing the fabrication of the high-voltage transformer insulator structure. The nut tightening method utilizes the sealing ring's ability to soften upon heating. Tightening the nut while hot can achieve a larger shrinkage ratio, thereby improving the sealing performance of the insulator on the cover. When cleaning the sealing ring I4 and the sealing ring II12, check whether the sealing ring I4 and the sealing ring II12 are damaged and remove them if necessary. According to the above process, after multiple tightening, the sealing performance of the insulator is improved and loosening can be prevented.

[0038] The high-voltage transformer insulator structure and manufacturing method described in this invention utilize improvements to its structure and manufacturing method based on the oil-immersed operating environment of the insulator. This improves the insulator's sealing function during oil immersion, preventing oil intrusion. Furthermore, it enhances insulation performance, extending the service life of various components and reducing the need for frequent maintenance and replacement. During the insulator structure fabrication, clean the oil stains from sealing ring I, sealing ring II, bolts, and nuts, then dry them for later use. Rinse the upper and lower porcelain sleeves with running water to remove dust and stains, then dry them. Install the bolts, sealing ring I, upper porcelain sleeve, and sealing ring II above the fuel tank cover. Assemble the steel paper flat washer II, lower porcelain sleeve, steel paper flat washer I, and nuts below the fuel tank cover. Tighten the nuts for the first tightening. Place the assembled high-voltage transformer insulator structure in a blast drying oven, heat it to 90°C-95°C, and hold it for 3-4 hours. Remove it from the oven, tighten the nuts while hot for a second tightening, and allow it to cool to room temperature before tightening the nuts for a third tightening. In this structure, an oil channel is provided at the lower end of the bolt. During the vacuum oil filling process, transformer oil can be drawn into the gap (crevice) between the upper and lower porcelain sleeves, effectively improving the insulating performance of the insulator. In the above structure, the upper and lower porcelain sleeves are sealed and protected by sealing rings, ensuring that the porcelain sleeves will not be damaged during the tightening process of the nut and that a seal is achieved after compression. The high-voltage transformer insulator structure and manufacturing method described in the present invention utilize a unique process to manufacture the insulator, effectively reducing the problems of poor sealing, oil leakage, and loosening insulators in the prior art. Ultimately, the insulator ensures good high-voltage insulation and is not prone to breakdown. It also prevents transformer oil leakage from contaminating equipment, reduces the complexity of transformer cleaning, and comprehensively improves performance.

[0039] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. An insulator structure for a high-voltage transformer, characterized in that: The invention comprises a bolt (1), a limit table (10) is provided near the upper end of the bolt (1), an upper porcelain sleeve (2) and a lower porcelain sleeve (3) are sleeved on the bolt (1), the upper end of the upper porcelain sleeve (2) is fitted on the sealing ring I (4) sleeved on the bolt (1), the sealing ring I (4) is pressed against the limit table (10), the upper end of the lower porcelain sleeve (3) extends into the upper porcelain sleeve (2), and a gap (11) is formed between the lower porcelain sleeve (3) and the upper porcelain sleeve (2) extending into the upper porcelain sleeve (2), and a nut (6) is screwed on the lower part of the lower porcelain sleeve (3). The oil tank cover plate (8) is mounted on the lower porcelain sleeve (3), the upper end of the oil tank cover plate (8) is fitted on the sealing ring II (12) mounted on the lower porcelain sleeve (3), the sealing ring II (12) is fitted on the lower end of the upper porcelain sleeve (2), the lower end of the oil tank cover plate (8) is fitted on the limit surface (13) of the lower porcelain sleeve (3), the lower end of the bolt (1) is provided with an oil passage (9), and the oil passage (9) is connected to the gap (11); during the vacuum oil filling process, the transformer oil is sucked into the gap between the upper porcelain sleeve and the lower porcelain sleeve, thereby improving the insulation performance of the insulator; When manufacturing the insulator structure, clean the oil stains on the sealing ring I (4), the sealing ring II (12), the bolt (1), and the nut (6), dry them after cleaning, and use running water to rinse the dust and stains on the upper porcelain sleeve (2) and the lower porcelain sleeve (3), and dry them; install the bolt (1), the sealing ring I (4), the upper porcelain sleeve (2), and the sealing ring II (12) above the fuel tank cover (8), and assemble the steel paper flat washer II (16), the lower porcelain sleeve (3), the steel paper flat washer I (5), and the nut (6) below the fuel tank cover (8), tighten the nut (6), and perform the first tightening; put the assembled high-voltage transformer insulator structure into a blast drying oven, heat it to 90°C~95°C, keep it warm for 3h-4h, take it out and tighten the nut (6) while it is hot, and perform the second tightening; when it is cooled to room temperature, tighten the nut (6), and perform the third tightening, and complete the manufacturing of the high-voltage transformer insulator structure; The upper porcelain sleeve (2) is configured to have an N-shaped cross-section, and the diameter of the upper end face of the upper porcelain sleeve (2) is configured to be smaller than the diameter of the lower end face of the upper porcelain sleeve (2); the upper end portion of the lower porcelain sleeve (3) is configured to have a conical structure with a diameter gradually increasing from top to bottom.

2. The high-voltage transformer insulator structure according to claim 1, characterized in that: The bolt (1) of the high-voltage transformer insulator structure has an upper threaded portion (14) at its upper end, a ball nut (7) being screwed onto the upper threaded portion (14), a lower threaded portion (15) being provided at its lower end, a nut (6) being screwed onto the lower threaded portion (15), and a steel paper flat washer I (5) being mounted between the nut (6) and the lower end of the lower porcelain sleeve (3) being fitted onto the lower threaded portion (15).

3. The high-voltage transformer insulator structure according to claim 1, characterized in that: A steel paper flat washer II (16) is also mounted on the bolt (1), and the steel paper flat washer II (16) is configured to be located between the lower end surface of the fuel tank cover (8) and the upper surface of the lower porcelain sleeve (3).

4. The high-voltage transformer insulator structure according to claim 1, characterized in that: When the high-voltage transformer insulator structure is used, the high-voltage transformer insulator structure is located below the oil tank cover (8) and is configured to be immersed in transformer oil.

5. The high-voltage transformer insulator structure according to claim 1, characterized in that: The bolt (1) is configured as a structure machined from round steel, and a colored zinc electroplating layer is provided on the surface of the bolt (1).

6. The high-voltage transformer insulator structure according to claim 1, characterized in that: The upper porcelain sleeve (2) and the lower porcelain sleeve (3) are configured as structures made of fired ceramics, and creepage grooves (17) are respectively provided on the outer surfaces of the upper porcelain sleeve (2) and the lower porcelain sleeve (3).

7. The high-voltage transformer insulator structure according to claim 1, characterized in that: The sealing ring I (4) and the sealing ring II (12) are both configured to be structures made of fluorine-containing oil-resistant rubber plates.

8. The high-voltage transformer insulator structure according to claim 1, characterized in that: When cleaning the sealing ring I (4) and the sealing ring II (12), check whether the sealing ring I (4) and the sealing ring II (12) are damaged, and remove them if necessary.

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