A dust-proof structure for a varnish-impregnated high-voltage dry transformer insulating cylinder

Abstract

This invention discloses a varnish-impregnated high-voltage dry-type transformer insulation cylinder anti-dust accumulation structure, belonging to the field of transformers. It includes a dry-type transformer with a high-voltage coil and an insulation cylinder, and multiple sets of cooling fans; a dustproof component installed on the high-voltage coil; a blowing component installed on the high-voltage coil; a cleaning component installed on the dustproof component; a drive component installed on the cooling fans; and an air supply component installed on the cooling fans. This varnish-impregnated high-voltage dry-type transformer insulation cylinder anti-dust accumulation structure, through the dustproof component covering the ventilation gap between the insulation cylinder and the coil, prevents debris from intruding and accumulating; the drive component, powered by the cooling fans, drives the blowing component to move horizontally back and forth, coordinating with the air supply component to blow away accumulated dust through air nozzles; and the cleaning component simultaneously scrapes and cleans, effectively preventing deposits from obstructing heat dissipation and ventilation, improving the safe and stable operation of the transformer, and extending the service life of the equipment.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, and in particular to a varnish-impregnated high-voltage dry transformer insulation cylinder anti-dust accumulation structure. Background Technology

[0002] In existing technologies, the insulating cylinders of varnish-impregnated high-voltage dry-type transformers are mostly made using a vacuum pressure impregnation process combined with insulating materials such as fiberglass cloth and NOMEX paper. The impregnation process enhances the overall insulation performance and mechanical strength of the insulating cylinder, enabling it to meet the insulation requirements under high-voltage conditions. These are widely used in power transmission, industrial power distribution, and other fields. These insulating cylinders typically rely on their own material properties and the impregnation layer for basic protection. Some structures have an additional simple coating or sealing edge on the surface to reduce the direct impact of the external environment on the internal insulation structure.

[0003] However, existing varnish-impregnated high-voltage dry-type transformer insulation cylinders still have shortcomings in practical use: they mostly adopt an open or semi-open structure design, and assembly gaps and ventilation gaps inevitably exist between the insulation cylinder and the high and low voltage coils. These gaps become channels for external debris to enter. In practical application scenarios such as industrial plants and outdoor substations, dust, metal particles, and fiber debris in the environment can easily enter the gaps with airflow and accumulate. At the same time, spider webs, fallen leaves, and other debris will also adhere to the surface and corner gaps of the insulation cylinder and are difficult to remove. Over time, these deposits will cover the heat dissipation area on the surface of the insulation cylinder, hindering heat conduction and air circulation, causing the transformer operating temperature to rise, accelerating the aging and cracking of the varnish layer and the deterioration of the internal insulation material performance, and affecting the safe and stable operation of the transformer.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0005] This invention provides a dust-proof structure for varnish-impregnated high-voltage dry-type transformer insulation cylinders, which solves the problem that existing varnish-impregnated high-voltage dry-type transformer insulation cylinders are open / semi-open structures with gaps between them and the coils, making them prone to dust and debris accumulation, hindering heat dissipation, accelerating insulation aging, and affecting operational safety.

[0006] This invention adopts the following technical solution: a varnish-impregnated high-voltage dry-type transformer insulation cylinder anti-dust accumulation structure. It includes a dry-type transformer, which has a high-voltage coil and an insulation cylinder, and multiple sets of cooling fans are configured on the dry-type transformer; a dustproof assembly, installed on the high-voltage coil, for dustproofing the ventilation gap between the insulation cylinder and the coil; a blowing assembly, installed on the high-voltage coil, for blowing away dust accumulated on the dustproof assembly; a cleaning assembly, installed on the dustproof assembly, for scraping the surface of the dustproof assembly; a drive assembly, installed on the cooling fans, for causing the blowing assembly to move horizontally back and forth; and an air supply assembly, installed on the cooling fans, for providing airflow to the blowing assembly.

[0007] Furthermore, the dry-type transformer includes two sets of mounting bases at the bottom, and two sets of support frames are mounted on the two sets of mounting bases. Vertically arranged connectors are arranged on both sets of support frames. Clamping frames are fixed to the sides of the connectors arranged on the support frames. The dustproof component includes an arc-shaped cover disposed on the high-voltage coil and blocking the gap in the exposed state. The arc-shaped cover is designed to fit the arc surface of the high-voltage coil. A heat dissipation filter is embedded in the arc-shaped cover. The heat dissipation filter has a porous structure.

[0008] Furthermore, the blowing assembly includes a set of horizontal blowing sections and two sets of vertical blowing sections to form a U-shaped structure. The two sets of vertical blowing sections are respectively located above the heat dissipation filter on the high-voltage coils located on both sides, away from each other. The set of horizontal blowing sections is located above the heat dissipation filter on the same side of multiple sets of high-voltage coils. The vertical blowing sections have a similar structure to the horizontal blowing sections.

[0009] Furthermore, the horizontal blowing section includes two sets of right-angle frames fixed to the bottom surface of the clamping frame. A ventilation duct is movably passed through the two sets of right-angle frames. Anti-detachment ends are fixed at both ends of the ventilation duct. Springs are sleeved on the ventilation duct near both ends. One end of the spring is connected to the side of the right-angle frame, and the other end is connected to the side of the anti-detachment end. Multiple sets of air nozzles are arranged in an array along the straight direction on the surface of the ventilation duct. The air nozzles are inclined towards the surface of the heat dissipation filter.

[0010] Furthermore, the cleaning assembly includes a base fixed to the inner side of the arc-shaped cover, a mounting bracket connected to the base via a rotating shaft bearing, one end of the mounting bracket being movably connected to the surface of the ventilation duct, and a scraper for cleaning the surface of the heat dissipation filter fixed to the bottom surface of the mounting bracket.

[0011] Furthermore, the drive assembly includes T-shaped seats mounted on the cooling fans on both sides, with a second impeller mounted between the two sets of T-shaped seats. The second impeller is adapted to rotate, and its impeller shaft movably passes through both sets of T-shaped seats. A linkage unit is mounted on the impeller shaft at both ends. The linkage unit includes a pulley three fixedly sleeved on the impeller shaft. A protective cover two is vertically mounted on the cooling fan to protect the pulley three. A pulley four is mounted on the inner wall of one end of the protective cover two, and a belt body two is connected between the pulley four and the pulley three.

[0012] Furthermore, the clamping frame is provided with a mounting cover on its side, and a gear set is provided inside the mounting cover. The gear set includes a bevel gear one fixed inside the pulley four. A drive shaft is provided with a bearing inside the mounting cover. A bevel gear two that meshes with the bevel gear one is fixed at one end of the drive shaft, and a bevel gear three is fixed at the other end of the drive shaft. A cam is provided with a bearing on the bottom surface of the inner wall of the clamping frame. The cam is adapted to contact the anti-detachment end of a set of horizontal blowing parts and a set of vertical blowing parts having the ventilation duct end. The cam has a central shaft, and a bevel gear four that meshes with the bevel gear three is fixed on the central shaft. The initial state of the cams of the two sets of drive components and the contact position with the anti-detachment end of the ventilation duct end are different.

[0013] Furthermore, the air supply assembly includes support seats fixed on the cooling fans located on both sides. A first impeller is mounted between the two sets of support seats. The first impeller has an impeller shaft that movably passes through the two sets of support seats. A transmission unit is mounted on one end of the impeller shaft. The transmission unit includes a pulley fixed on the impeller shaft. A vertical protective cover is mounted on the cooling fan. A second pulley is mounted on the inner wall of one end of the protective cover. A belt body is connected between the first pulley and the second pulley.

[0014] Furthermore, a bracket is fixed on the clamping frame, and a ventilator is fixed on the side of the bracket. The fan shaft of the ventilator is connected to the pulley. A flexible hose is connected to the air outlet of the ventilator. The flexible hose is connected to one end of the ventilation duct of a set of vertical blowing parts. A set of horizontal blowing parts is connected to the ventilation ducts of the two sets of vertical blowing parts through a flexible tube.

[0015] Furthermore, the high-voltage coils are arranged in three groups, and the support frames of two groups are connected and fixed by fixing bolts. The connectors on the two groups of support frames are symmetrically arranged, and the symmetrically arranged connectors extend into the high-voltage coils. A transformer core is arranged between the multiple groups of symmetrically arranged connectors, and a part of the transformer core extends into the high-voltage coils. The clamping frames are fixed by fasteners, and the clamping frames are equipped with terminals on their sides. Multiple cooling fans are symmetrically arranged on both sides of the high-voltage coils.

[0016] The above-mentioned at least one technical solution adopted in this invention can achieve the following beneficial effects:

[0017] A dust-proof structure for a varnish-impregnated high-voltage dry-type transformer insulation cylinder is disclosed. This structure covers the ventilation gap between the insulation cylinder and the coil using a dust-proof component, preventing the intrusion and deposition of dust, metal particles, fiber debris, cobwebs, fallen leaves, and other impurities from industrial plants and outdoor power distribution rooms. A drive component, powered by a cooling fan, drives a blowing component to move horizontally back and forth, working in conjunction with a continuous airflow from a supply component to directionally blow away dust from the surface of the dust-proof component. Simultaneously, a cleaning component scrapes and cleans the surface of the dust-proof component, solving the problem of difficult-to-remove debris. This effectively prevents deposits from covering the heat dissipation area, hindering heat conduction and air circulation, preventing the transformer's operating temperature from rising, delaying the aging and cracking of the varnish layer and the degradation of the internal insulation material's performance, significantly improving the transformer's safe and stable operation in complex environments, and extending the equipment's service life. Attached Figure Description

[0018] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0019] In the attached diagram:

[0020] Figure 1 This is an overall schematic diagram of a dust-proof structure for an impregnated high-voltage dry transformer insulating cylinder according to this application;

[0021] Figure 2 for Figure 1 A partial structural diagram;

[0022] Figure 3 for Figure 2 A schematic diagram of the rear structure;

[0023] Figure 4 for Figure 2 A partial structural diagram;

[0024] Figure 5 for Figure 4 Enlarged view of point A;

[0025] Figure 6 for Figure 5 Enlarged view of point B;

[0026] Figure 7 for Figure 1 A partial structural diagram;

[0027] Figure 8 for Figure 7 Enlarged view of point C;

[0028] Figure label:

[0029] 1. Dry-type transformer; 11. Mounting base; 12. Support frame; 13. Fixing bolts; 14. High-voltage coil; 15. Connecting parts; 16. Clamping frame; 17. Transformer core; 18. Terminal block; 19. Cooling fan; 2. Air supply assembly; 21. Support base; 22. Fan wheel one; 23. Pulley one; 24. Belt body one; 25. Bracket; 26. Ventilation fan; 27. Pulley two; 29. ​​Hose; 210. Flexible pipe; 211. Protective cover one; 3. Blow-out assembly; 31. Horizontal blow-out section; 311. Right-angle frame; 312. Ventilation duct; 31 3. Anti-detachment end; 314. Spring; 315. Air nozzle; 32. Vertical blowing section; 4. Cleaning assembly; 41. Mounting bracket; 42. Base; 43. Rotating shaft; 44. Scraper; 5. Dustproof assembly; 51. Arc-shaped cover; 52. Heat dissipation filter; 6. Drive assembly; 61. T-shaped seat; 62. Pulley three; 63. Belt body two; 64. Protective cover two; 65. Mounting cover; 67. Pulley four; 68. Bevel gear one; 69. Drive shaft; 610. Bevel gear two; 611. Bevel gear three; 612. Bevel gear four; 613. Cam; 614. Fan wheel two. Detailed Implementation

[0030] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0031] The technical solutions provided by the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] Reference Figures 1-2As shown, the present invention provides a varnish-impregnated high-voltage dry transformer insulation cylinder anti-dust accumulation structure, including a dry transformer 1. The dry transformer 1 includes two sets of mounting bases 11 located at the bottom, and two sets of support frames 12 are mounted on the two sets of mounting bases 11. Three sets of high-voltage coils 14 are arranged in a row on the support frames 12 by clamping blocks. An insulation cylinder and a low-voltage coil are arranged in sequence inside the high-voltage coils 14. The two sets of support frames 12 are connected and fixed by fixing bolts 13. Vertically arranged connecting members 15 are arranged on both sets of support frames 12. The connecting members 15 on the two sets of support frames 12 are symmetrically arranged and extend into the interior of the high-voltage coils 14.

[0033] Furthermore, a transformer core 17 is arranged between multiple sets of symmetrical connecting parts 15. A portion of the transformer core 17 extends into the high-voltage coil 14 to achieve magnetic transmission of electrical energy. Clamping frames 16 are fixed to the sides of the connecting parts 15 arranged on the support frame 12. The two sets of clamping frames 16 are fixed together by fasteners to clamp the transformer core 17, ensuring accurate relative positioning between the core and the coil and improving the transformation efficiency. At the same time, terminal blocks 18 are assembled on the sides of the clamping frames 16 for circuit connection and expansion to meet the electrical wiring requirements of the equipment. In addition, multiple sets of cooling fans 19 are connected and installed on the two sets of mounting bases 11. The multiple sets of cooling fans 19 are symmetrically arranged on both sides of the high-voltage coil 14, which can efficiently dissipate heat from the high-voltage coil 14, remove the heat generated during operation, ensure the stable operation of the dry-type transformer 1, and its symmetrical layout also helps to form a uniform heat dissipation airflow, further optimizing the heat dissipation effect.

[0034] To protect the ventilation gap between the insulating cylinder and the high and low voltage coils from dust, such as... Figures 4-5 As shown, due to the presence of three sets of high-voltage coils 14, the reference... Figure 4 It can be seen that the high-voltage coil 14 located in the middle is shielded by the transformer core 17 above, with only the insulating cylinders on both sides and the high and low voltage coils exposed by ventilation gaps. At the same time, the high-voltage coils 14 located on both sides are shielded by the transformer core 17 above, with the insulating cylinders on three sides and the high and low voltage coils exposed by ventilation gaps. On the insulating surface of the high-voltage coil 14, a dustproof component 5 is provided at the exposed gaps. The dustproof component 5 includes an arc-shaped cover 51 installed on the high-voltage coil 14 and shielding the exposed gaps. The arc-shaped cover 51 is designed to fit the arc surface of the high-voltage coil 14 and can accurately cover the exposed gaps. A heat dissipation filter 52 is embedded in the arc-shaped cover 51. The heat dissipation filter 52 has a porous structure, which can effectively block dust from entering the ventilation gaps and ensure air circulation for heat dissipation.

[0035] To remove dust and fallen leaves accumulated on the heat dissipation filter 52, such as Figures 4-8 As shown, in actual use, refer to Figure 7 The heat dissipation filter 52 at the ventilation gap on one side of the three sets of high voltage coils 14 is blocked by the terminal 18. Therefore, in this embodiment, by cleaning the heat dissipation filter 52 at the other ventilation gap, a blowing assembly 3 is provided on the high voltage coil 14. The blowing assembly 3 includes a set of horizontal blowing parts 31 and two sets of vertical blowing parts 32, forming a U-shaped structure. The two sets of vertical blowing parts 32 are respectively located above the heat dissipation filter 52 on the two sides of the high voltage coil 14 that are far away from each other. The set of horizontal blowing parts 31 is located above the heat dissipation filter 52 on the same side of the three sets of high voltage coils 14. The vertical blowing part 32 has a similar structure to the horizontal blowing part 31. Here, only the structure of the horizontal blowing part 31 will be described.

[0036] The horizontal blowing unit 31 includes two sets of right-angle frames 311 fixed to the bottom surface of the clamping frame 16. A ventilation duct 312 is movably passed between the two sets of right-angle frames 311. Anti-detachment ends 313 are fixed at both ends of the ventilation duct 312. At the same time, springs 314 are sleeved on the ventilation duct 312 near both ends. One end of the spring 314 is connected to the side of the right-angle frame 311, and the other end is connected to the side of the anti-detachment end 313, so that the ventilation duct 312 has horizontal displacement space. Multiple sets of air nozzles 315 are arranged in an array along the straight direction on the surface of the ventilation duct 312. The air nozzles 315 are inclined towards the surface of the heat dissipation filter 52. In actual use, they can effectively blow away dust and fallen leaves on the surface of the heat dissipation filter 52 in a directional manner.

[0037] Continue to refer to Figures 5-6 As shown, two sets of cleaning components 4 are provided on each set of arc-shaped covers 51 with spacing between them. Each cleaning component 4 includes a base 42 fixed on the inner side of the arc-shaped cover 51. A mounting bracket 41 is connected to the base 42 by a rotating shaft 43 bearing. One end of the mounting bracket 41 is movably connected to the surface of the ventilation duct 312. At the same time, a scraper 44 for cleaning the surface of the heat dissipation filter 52 is fixed on the bottom surface of the mounting bracket 41. When the ventilation duct 312 moves horizontally, the scraper 44 is driven to rotate along the axis of the rotating shaft 43 through the mounting bracket 41. In actual operation, it can physically clean the surface of the heat dissipation filter 52.

[0038] To provide power for the horizontal reciprocating movement of ventilation duct 312, such as Figures 7-8As shown, a drive assembly 6 is connected to multiple cooling fans 19 on one side of the three sets of high-voltage coils 14. The drive assembly 6 includes T-shaped seats 61 located on the cooling fans 19 on both sides. A second impeller 614 is mounted between the two sets of T-shaped seats 61. The second impeller 614 is adapted to rotate while the cooling fans 19 blow cooling air upwards. The impeller shaft of the second impeller 614 is movably connected through the two sets of T-shaped seats 61. A linkage unit is provided on the impeller shaft at both ends. The linkage unit includes a third pulley 62 fixedly sleeved on the impeller shaft. At the same time, a second protective cover 64 is vertically mounted on the cooling fans 19 to protect the third pulley 62. A fourth pulley 67 is mounted on the inner wall of one end of the second protective cover 64. A belt body 63 is connected between the fourth pulley 67 and the third pulley 62.

[0039] A mounting cover 65 is provided on the side of the clamping frame 16. A gear set is provided inside the mounting cover 65. The gear set includes a bevel gear 68 fixed in the pulley 67. A drive shaft 69 is also provided in the mounting cover 65. A bevel gear 610 that meshes with the bevel gear 68 is fixed at one end of the drive shaft 69, and a bevel gear 611 is fixed at the other end of the drive shaft 69. A cam 613 is provided in the bearing on the bottom surface of the inner wall of the clamping frame 16. The cam 613 is adapted to contact a set of horizontal blowing parts 31 and a set of vertical blowing parts 3. 2. It has an anti-detachment end 313 at the end of the ventilation duct 312, and the cam 613 has a central shaft. A bevel gear 612 that meshes with the bevel gear 611 is fixed on the central shaft. It should be noted that the initial state of the cam 613 of the two sets of drive components 6 is different from the contact position of the anti-detachment end 313 at the end of the ventilation duct 312. In actual operation, the two sets of drive components 6 can drive a set of horizontal blowing parts 31 and two sets of vertical blowing parts 32 to achieve alternating reciprocating motion, thereby driving the scraper 44 to perform reciprocating scraping and cleaning action on the surface of the heat dissipation filter 52.

[0040] In order to provide airflow to the air nozzles 315 of the ventilation duct 312, such as Figure 3 and Figure 8As shown, an air supply assembly 2 is connected to multiple cooling fans 19 on the other side of the three sets of high-voltage coils 14. The air supply assembly 2 includes a support base 21 fixed on the cooling fans 19 on both sides, and a fan wheel 22 is mounted between the two sets of support bases 21. The fan wheel 22 is adapted to rotate while the cooling fans 19 blow cooling air upwards. The fan wheel 22 has a fan wheel shaft that moves through the two sets of support bases 21. A transmission unit is mounted on one end of the fan wheel shaft. The transmission unit includes a pulley 23 fixed on the fan wheel shaft. A vertical protective cover 211 is mounted on the cooling fans 19. A pulley 27 is mounted on the inner wall of one end of the protective cover 211. A belt body 24 is connected between the pulley 23 and the pulley 27.

[0041] Meanwhile, a bracket 25 is fixed on the clamping frame 16, and a ventilator 26 is fixed on the side of the bracket 25. The fan shaft of the ventilator 26 is connected to the pulley 27, and a hose 29 is connected to the air outlet of the ventilator 26. The hose 29 is connected to one end of the ventilation duct 312 of a set of vertical blowing parts 32. At the same time, a flexible tube 210 connects a set of horizontal blowing parts 31 and the ventilation ducts 312 of two sets of vertical blowing parts 32. As can be seen from the connection layout of the pipes in the figure, in actual use, the air entering from the ventilation duct 312 of a set of vertical blowing parts 32 can enter the ventilation ducts 312 of a set of horizontal blowing parts 31 and two sets of vertical blowing parts 32 in sequence, thereby continuously providing blowing power to the nozzle 315. The protective cover 211 is used to protect the pulley 23, the second pulley 27 and the belt body 24 to prevent external dust and debris from entering and affecting the transmission stability, and to prevent personnel from accidentally touching the transmission components.

[0042] Working principle: To remove dust accumulation on the heat dissipation filter 52, the drive assembly 6 works in conjunction with the air supply assembly 2. In the drive assembly 6, the upward cooling air from the cooling fan 19 drives the second impeller 614 to rotate. The impeller shaft transmits power through the third pulley 62, the second belt body 63, and the fourth pulley 67. The power is then transmitted through the meshing of the first bevel gear 68, the second bevel gear 610, the drive shaft 69, the third bevel gear 611, and the fourth bevel gear 612 inside the mounting cover 65, ultimately causing the cam 613 to rotate. The cams 613 of the two sets of drive assemblies 6 have different initial contact positions, thereby driving the ventilation ducts 312 of one set of horizontal blowing parts 31 and two sets of vertical blowing parts 32 to achieve alternating horizontal reciprocating motion.

[0043] The air supply assembly 2 uses the cooling air from the cooling fan 19 to drive the impeller 22 to rotate. The impeller shaft drives the ventilator 26 through the pulley 23, belt 24, and pulley 27. The air generated by the ventilator 26 is delivered through the hose 29 and flexible pipe 210 to the ventilation duct 312 of a set of horizontal blowing sections 31 and two sets of vertical blowing sections 32, providing continuous blowing power for the nozzle 315. The protective cover 211 protects the transmission components of the air supply assembly 2 and ensures transmission stability.

[0044] When the ventilation duct 312 reciprocates horizontally under the action of the cam 613 and the spring 314, on the one hand, the air nozzles 315, which are inclined on the surface of the ventilation duct 312, spray airflow onto the surface of the heat dissipation filter 52 to directionally sweep away dust and fallen leaves; on the other hand, the movement of the ventilation duct 312 drives the mounting bracket 41 of the cleaning assembly 4 to rotate around the rotation axis 43, so that the scraper 44 on the bottom surface of the mounting bracket 41 reciprocates to scrape and clean the surface of the heat dissipation filter 52. The U-shaped structure design of the blowing assembly 3 allows one set of horizontal blowing sections 31 and two sets of vertical blowing sections 32 to cover the exposed heat dissipation filter 52 areas of the three sets of high-voltage coils 14. The blowing of the air nozzles 315 and the physical cleaning of the scraper 44 work together to efficiently remove the dust accumulated on the heat dissipation filter 52 and prevent dust blockage from affecting heat dissipation.

[0045] Throughout the entire operation, the arc-shaped cover 51 and heat dissipation filter 52 of the dustproof component 5 continuously block external dust from entering the ventilation gap between the insulation cylinder and the high and low voltage coils, ensuring the cleanliness of the transformer interior; the symmetrical layout of the cooling fan 19 forms a uniform heat dissipation airflow, which, combined with the ventilation characteristics of the heat dissipation filter 52, ensures the heat dissipation efficiency of the high voltage coil 14; while the periodic dust removal actions of the blowing component 3 and the cleaning component 4 can maintain the permeability of the heat dissipation filter 52, so that the dustproof and heat dissipation functions can be stably performed for a long time, ultimately achieving the dual guarantee of dust prevention and efficient heat dissipation for the varnish-impregnated high voltage dry transformer insulation cylinder, and improving the operational reliability of the dry-type transformer 1.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A dust accumulation prevention structure for an insulation cylinder of a varnished high-voltage dry-type transformer, characterized by: include A dry-type transformer (1) is provided with a high-voltage coil (14) and an insulating cylinder, and multiple cooling fans (19) are provided on the dry-type transformer (1). Dustproof assembly (5), which is installed on the high-voltage coil (14), is used to prevent dust from entering the ventilation gap between the insulating cylinder and the coil; A blow-off assembly (3), which is mounted on a high-voltage coil (14), is used to blow off dust accumulated on the dustproof assembly (5); A cleaning component (4), which is mounted on the dustproof component (5), is used to scrape the surface of the dustproof component (5); A drive assembly (6), which is mounted on a cooling fan (19), is used to make the blowing assembly (3) move horizontally back and forth; an air supply assembly (2), which is mounted on a cooling fan (19), is used to provide airflow to the blowing assembly (3); The dry-type transformer (1) includes two sets of mounting bases (11) located at the bottom. Two sets of support frames (12) are mounted on the two sets of mounting bases (11). Vertically arranged connectors (15) are arranged on both sets of support frames (12). Clamping frames (16) are fixed on the sides of the connectors (15) arranged on the support frames (12). The dustproof component (5) includes an arc-shaped cover (51) set on the high-voltage coil (14) and blocking the gap in the exposed state. The arc-shaped cover (51) fits the arc surface design of the high-voltage coil (14). A heat dissipation filter (52) is embedded in the arc-shaped cover (51). The heat dissipation filter (52) has a porous structure. The blowing assembly (3) includes a set of horizontal blowing sections (31) and two sets of vertical blowing sections (32) to form a U-shaped structure. The two sets of vertical blowing sections (32) are respectively located above the heat dissipation filter (52) on the high voltage coil (14) located on both sides, away from each other. The set of horizontal blowing sections (31) is located above the heat dissipation filter (52) on the same side of multiple sets of high voltage coil (14). The vertical blowing section (32) and the horizontal blowing section (31) have similar structures. The horizontal blowing section (31) includes two sets of right-angle brackets (311) fixed to the bottom surface of the clamping frame (16). A ventilation duct (312) is movably passed between the two sets of right-angle brackets (311). Anti-detachment ends (313) are fixed at both ends of the ventilation duct (312). Springs (314) are sleeved on the ventilation duct (312) near both ends. One end of the spring (314) is connected to the side of the right-angle bracket (311), and the other end is connected to the side of the anti-detachment end (313). Multiple sets of air nozzles (315) are arranged in an array along the straight direction on the surface of the ventilation duct (312). The air nozzles (315) are inclined toward the surface of the heat dissipation filter (52).

2. The dust accumulation prevention structure of the impregnated high-voltage dry-type transformer insulation cylinder according to claim 1, characterized in that: The cleaning assembly (4) includes a base (42) fixed to the inner side of the arc-shaped cover (51). A mounting bracket (41) is connected to the base (42) via a rotating shaft (43) bearing. One end of the mounting bracket (41) is movably connected to the surface of the ventilation duct (312). A scraper (44) for cleaning the surface of the heat dissipation filter (52) is fixed to the bottom surface of the mounting bracket (41).

3. The anti-dust accumulation structure of the varnish-impregnated high-voltage dry transformer insulating cylinder according to claim 2, characterized in that: The drive assembly (6) includes a T-shaped seat (61) located on the cooling fans (19) on both sides. A second impeller (614) is provided between the two sets of T-shaped seats (61). The second impeller (614) is adapted to rotate. The impeller shaft of the second impeller (614) is movably connected through the two sets of T-shaped seats (61). A linkage unit is provided on the impeller shaft at both ends. The linkage unit includes a pulley three (62) fixedly sleeved on the impeller shaft. A protective cover two (64) is vertically provided on the cooling fan (19) to protect the pulley three (62). A pulley four (67) is provided on the inner wall of one end of the protective cover two (64). A belt body two (63) is connected between the pulley four (67) and the pulley three (62).

4. The anti-dust accumulation structure of the varnish-impregnated high-voltage dry transformer insulating cylinder according to claim 3, characterized in that: The clamping frame (16) has a mounting cover (65) on its side. A gear set is provided inside the mounting cover (65). The gear set includes a bevel gear one (68) fixed inside the pulley four (67). A drive shaft (69) is provided in the bearing inside the mounting cover (65). A bevel gear two (610) that meshes with the bevel gear one (68) is fixed at one end of the drive shaft (69). A bevel gear three (611) is fixed at the other end of the drive shaft (69). The bearing on the bottom surface of the inner wall of the clamping frame (16) is provided with... A cam (613) is provided, which is adapted to contact a set of horizontal blowing parts (31) and a set of vertical blowing parts (32) having anti-detachment ends (313) at the end of the ventilation duct (312). The cam (613) has a central shaft, on which a bevel gear four (612) is fixed to mesh with the bevel gear three (611). The initial state of the cam (613) of the two sets of drive components (6) is different from the contact position of the anti-detachment ends (313) at the end of the ventilation duct (312).

5. The anti-dust accumulation structure of the varnish-impregnated high-voltage dry transformer insulating cylinder according to claim 4, characterized in that: The air supply assembly (2) includes a support base (21) fixed on the cooling fans (19) on both sides. A first impeller (22) is provided between the two sets of support bases (21). The first impeller (22) has an impeller shaft that movably passes through the two sets of support bases (21). A transmission unit is provided on one end of the impeller shaft. The transmission unit includes a pulley (23) fixed on the impeller shaft. A vertical protective cover (211) is provided on the cooling fan (19). A second pulley (27) is provided on the inner wall of one end of the protective cover (211). A belt body (24) is connected between the first pulley (23) and the second pulley (27).

6. The anti-dust accumulation structure of the varnish-impregnated high-voltage dry transformer insulating cylinder according to claim 5, characterized in that: A bracket (25) is fixed on the clamping frame (16), and a ventilator (26) is fixed on the side of the bracket (25). The fan shaft of the ventilator (26) is connected to the second pulley (27). A hose (29) is connected to the air outlet of the ventilator (26). The hose (29) is connected to one end of the ventilation duct (312) of a set of vertical blowing parts (32). A set of horizontal blowing parts (31) and the ventilation ducts (312) of two sets of vertical blowing parts (32) are connected by a flexible tube (210).

7. The anti-dust accumulation structure of the varnish-impregnated high-voltage dry transformer insulating cylinder according to claim 6, characterized in that: The high-voltage coil (14) is arranged in three sets. The two sets of support frames (12) are connected and fixed by fixing bolts (13). The connectors (15) on the two sets of support frames (12) are symmetrically arranged. The symmetrically arranged connectors (15) extend into the high-voltage coil (14). A transformer core (17) is arranged between the multiple sets of symmetrically arranged connectors (15). A part of the transformer core (17) extends into the high-voltage coil (14). The two sets of clamping frames (16) are fixed by fasteners. The clamping frames (16) are equipped with terminals (18) on the side. Multiple sets of cooling fans (19) are symmetrically arranged on both sides of the high-voltage coil (14).

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