Dry-type power transformer and use method

Abstract

The invention relates to the field of transformers, and discloses a dry-type power transformer and a using method.The dry-type power transformer comprises a supporting base, a protection box is installed on the top of the supporting base, openings are formed in the two sides of the protection box, the protection box is hinged to a box door through hinges, and through openings are formed in the two side walls of the protection box; a first dustproof mechanism and a second dustproof mechanism are installed at the positions of the through openings respectively, a supporting seat is fixedly installed at the top of the supporting base, a transformer body is fixedly installed on the supporting seat, two symmetrical supporting columns are arranged at the top of the supporting base, and a moving mechanism is installed at the top ends of the supporting columns. The first dustproof mechanism and the second dustproof mechanism are arranged on the two sides of the protection box, and a first dustproof net and a second dustproof net in the first dustproof mechanism and the second dustproof mechanism can be replaced conveniently, so that the use flexibility of the equipment is improved.

Description

Technical Field

[0001] The present invention relates to the field of transformers, and in particular to a dry-type power transformer and a use method thereof. Background Art

[0002] Dry-type transformers are widely used in local lighting, high-rise buildings, airports, docks, CNC machinery and equipment and other places. Simply put, dry-type transformers refer to transformers whose cores and windings are not immersed in insulating oil. The cooling methods are divided into natural air cooling and forced air cooling; Dry-type transformers need to dissipate heat during use, so several heat dissipation holes are opened on the outer wall of the protective box. Dust-proof nets are installed at the heat dissipation holes to prevent dust in the air from entering the transformer. After the dust-proof net has been used for a period of time, a lot of dust will accumulate on the outer surface of the dust-proof net. It is also troublesome to replace the dust-proof net, and its functionality is insufficient. Summary of the invention

[0003] In order to solve the problems raised in the above background technology, the present invention provides a dry-type power transformer and a use method thereof.

[0004] The present invention provides a dry-type power transformer and a method of using the same, which adopts the following technical solutions: A dry-type power transformer comprises a support base, a protection box is installed on the top of the support base, openings are provided on both sides of the protection box, the openings are hinged to the box door through hinges, through openings are provided on the two side walls of the protection box, a first dustproof mechanism and a second dustproof mechanism are respectively installed at the through openings, a support seat is fixedly installed on the top of the support base, a transformer body is fixedly installed on the support seat, two symmetrical support columns are arranged on the top of the support base, a moving mechanism is installed on the top of the support column, and the moving structure drives a heat dissipation fin seat to move, the heat dissipation fin seat is located above the transformer body, and a cleaning component for cleaning dust on the heat dissipation fin seat is also arranged in the protection box; The second dustproof mechanism comprises a second dustproof frame installed at the opening of the protection box, a third winding drum and a fourth winding drum are installed on the outer wall of the protection box, the second dustproof frame is provided with a through slot connected up and down, the fourth winding drum is installed in the fourth winding drum, the fourth winding roller is used to wind up the second dustproof net, one end of the second dustproof net passes through the through slot provided on the second dustproof frame, and one end of the second dustproof net is connected to the third winding roller in the third winding drum through a connecting belt, a second motor is installed at one end of the third winding drum, the output end of the second motor is installed between the third winding roller, a second empty slot is provided on the inner wall of the second dustproof frame, a second pressing strip is provided in the second empty slot, a screw hole is provided on the outer wall of the second dustproof frame, and the screw hole and the corresponding second screw are adapted to be installed, one end of the second screw is installed with a bearing seat installed on the second pressing strip through a bearing, the second pressing strip presses the second dustproof net, and a plurality of second dust-blocking brushes are provided at the top opening of the fourth winding drum; The first dustproof mechanism includes a first dustproof frame arranged at the opening, a heat dissipation fan frame is installed on the outer wall of the first dustproof frame, a heat dissipation fan is installed in the heat dissipation fan frame, a through slot connected up and down is opened on the first dustproof frame, a first winding drum and a second winding drum are arranged on the outer wall of the protection box, a second winding roller for winding up the first dustproof net is installed in the second winding drum, one end of the first dustproof net passes through the through slot opened on the first dustproof frame, and one end of the first dustproof net is installed between the first winding roller through a connecting belt, and one end of the first winding drum is installed There is a first motor, the output end of the first motor is installed between the first winding roller, the first winding roller winds up the first dustproof net, a first empty groove is opened on the inner wall of the first dustproof frame, a first clamping strip is arranged in the first empty groove, a screw hole is opened on the outer wall of the first dustproof frame, and the corresponding screw hole is adapted to be installed between the first screw rod, one end of the first screw rod is installed with the bearing seat installed on the first clamping strip through a bearing, the first clamping strip clamps the first dustproof net, and a plurality of first dust-blocking brushes are arranged at the top of the inner wall of the second winding roller.

[0005] Preferably, the moving mechanism includes a U-shaped seat installed on the top of the support column, a first servo motor is fixedly installed on one end of the U-shaped seat, the output end of the first servo motor is installed between the first transmission screw, one end of the first transmission screw is installed with a bearing seat installed on the U-shaped seat through a bearing, the first transmission screw is adapted to be installed between the wire sleeve block installed on the heat dissipation fin seat, and a plurality of heat dissipation fins are installed on the heat dissipation fin seat.

[0006] Preferably, the cleaning component includes a first cylinder installed on the top of the protective box and an L-shaped column installed on the bottom of the U-shaped seat, the output end of the first cylinder is installed on the top of the dust hood, the top interface of the dust hood is installed between the air outlet pipe through a hose, and one end of the air outlet pipe is installed with the dust suction fan through a hose.

[0007] Preferably, one end of the L-shaped column is fixedly installed between the connecting seat, a second cylinder is fixedly installed at the bottom of the connecting seat, the output end of the second cylinder is fixedly connected to the support cover, a second servo motor is fixedly installed at one end of the support cover, the output end of the second servo motor is connected to one end of the second transmission screw, the other end of the second transmission screw is installed with a bearing seat installed on the inner wall of the support cover through a bearing, the second transmission screw is also adapted to be installed between the transmission block, a plurality of support strips are arranged on the top of the transmission block, a plurality of cleaning brushes are arranged on the outer wall of the support strip, sliders are arranged at both ends of the transmission block, the sliders move in a slide groove opened on the inner wall of the support cover, and the support strip is inserted into the gap between two adjacent heat dissipation fins.

[0008] Preferably, a plurality of limit assemblies for limiting and fixing the box door are arranged on both sides of the protective box, and the limit assemblies include a support block fixedly mounted on the protective box, a third cylinder is mounted on the support block, an output end of the third cylinder is mounted between a limit rod, and the limit rod is inserted into a corresponding through hole opened on the box door.

[0009] A method for using a dry-type power transformer comprises the following steps: Steps for replacing the dust-proof net: when the first dust-proof net or the second dust-proof net needs to be replaced, the first screw on the first dust-proof frame is rotated to loosen the first pressing strip that presses the first dust-proof net, and the first motor on the first winding drum is operated to drive the first winding roller in the first winding drum to rotate, and the corresponding first dust-proof net will slowly move upward, and the first dust-proof net wound in the second winding roller will be rolled out, and the first dust-proof net that needs to be replaced is replaced and placed in the first dust-proof frame, and dust prevention work is performed in the first dust-proof frame, and the replaced first dust-proof net will be rolled up on the first winding roller, and the replacement of the first dust-proof net is completed; The steps of cleaning dust on the heat sinking fins are as follows: the first servo motor in the moving mechanism works to drive the first transmission screw to rotate. While the first transmission screw rotates, the heat sinking fins can be driven to move and move to appropriate positions. The heat sinking fins are located below the dust suction hood and above the support hood. The second cylinder at the bottom of the connecting seat works to drive the support hood to move upward. The first cylinder drives the dust suction hood to move downward, so that the dust suction hood covers the top of the heat sink seat, and the support hood covers the bottom of the heat sink seat, so that the heat sinking fins are completely covered, and the support strips on the transmission block are inserted into the gaps in the heat sinking fins. The second servo motor works to drive the second transmission screw to rotate, so that the support strips on the transmission block move back and forth. The cleaning brush on the support strips wipes the dust on the heat sinking fins. Combined with the dust suction fan, the wiped dust can be sucked into the collection box to complete the cleaning of the heat sinking fins.

[0010] In summary, the present invention includes the following beneficial technical effects: The heat dissipation fins in the present invention are located above the transformer body, and are combined with a moving mechanism to drive the heat dissipation fins to move, and the heat dissipation fins are moved to one side, which provides convenience for maintaining the transformer body. In addition, the moving mechanism is combined with the cleaning component. After the moving mechanism moves the heat dissipation fins, the dust collection cover and the support cover in the cleaning component cover the heat dissipation fins. After the second servo motor works, it drives the second transmission screw to rotate, so that the support strips move back and forth on the heat dissipation fins, and the cleaning brush on the support strips cleans the heat dissipation fins. The dust collection fan sucks the cleaned dust into the collection box, thereby improving functionality. The present invention is provided with a first dustproof mechanism and a second dustproof mechanism on both sides of the protection box, and the first dustproof net and the second dustproof net in the first dustproof mechanism and the second dustproof mechanism can be easily replaced, thereby improving the flexibility of equipment use. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a structural schematic diagram of a dry-type power transformer in an embodiment of the present invention; Figure 2 is a schematic diagram of the position structure of the second dustproof frame in an embodiment of the present invention; Figure 3 is a schematic diagram of the position structure of the transformer body in an embodiment of the present invention; Figure 4 is a schematic diagram of the position structure of the support cover in an embodiment of the present invention; Figure 5 is a schematic diagram of the position structure of the third winding drum in an embodiment of the present invention; Figure 6 is a schematic diagram of the position structure of the first winding drum in an embodiment of the present invention; Figure 7 In the embodiment of the present invention Figure 1 A magnified view of the structure at A; Figure 8 In the embodiment of the present invention Figure 5 A magnified view of the structure at B; Fig. 9 In the embodiment of the present invention Figure 6 Enlarged view of the structure at location C.

[0012] Explanation of the reference numerals: 1. Support base; 2. Box door; 3. Protection box; 4. First cylinder; 5. Exhaust pipe; 6. First take-up drum; 7. First dustproof frame; 8. Second take-up drum; 9. First motor; 10. Cooling fan frame; 11. Second dustproof frame; 12. Second screw; 13. Third take-up drum; 14. Second motor; 15. Fourth take-up drum; 16. Support seat; 17. Transformer body; 18. Support column; 19. Heat dissipation fin seat; 20. Heat dissipation fin; 21. U-shaped seat; 22. First servo motor; 23. First transmission screw; 24. Sleeve block; 25. Dust hood ; 26. L-shaped column; 27. Connecting seat; 28. Second cylinder; 29. ​​Support cover; 30. Second servo motor; 31. Second transmission screw; 32. Transmission block; 33. Support strip; 34. Cleaning brush; 35. Slider; 36. Slide; 38. Support block; 39. Third cylinder; 40. Limit rod; 41. First winding roller; 42. First dust-proof net; 45. Empty slot; 46. Second pressure strip; 47. Second winding roller; 48. Second dust-blocking brush; 49. Third winding roller; 50. First empty slot; 51. First pressure strip; 52. Fourth winding roller; 53. First dust-blocking brush. DETAILED DESCRIPTION

[0013] The following is combined with Figure 1-Figure 9 The present invention is described in further detail.

[0014] The embodiment of the present invention discloses a dry-type power transformer, comprising a support base 1, a protection box 3 is installed on the top of the support base 1, openings are provided on both sides of the protection box 3, and the openings are hinged to the box door 2 through hinges, through openings are provided on the two side walls of the protection box 3, and a first dustproof mechanism and a second dustproof mechanism are respectively installed at the through openings, a support seat 16 is fixedly installed on the top of the support base 1, a transformer body 17 is fixedly installed on the support seat 16, two symmetrical support columns 18 are arranged on the top of the support base 1, a moving mechanism is installed on the top of the support column 18, and the moving structure drives a heat dissipation fin seat 19 to move, and the heat dissipation fin seat 19 is located above the transformer body 17, and a cleaning component for cleaning dust on the heat dissipation fin seat 19 is also arranged in the protection box 3; The second dustproof mechanism includes a second dustproof frame 11 installed at the opening of the protection box 3, a third winding drum 13 and a fourth winding drum 15 are installed on the outer wall of the protection box 3, the second dustproof frame 11 is provided with a through groove connected up and down, a fourth winding roller 47 is installed in the fourth winding drum 15, the fourth winding roller 47 winds up the second dustproof net 42, one end of the second dustproof net 42 passes through the through groove provided on the second dustproof frame 11, and one end of the second dustproof net 42 is connected to the third winding roller 41 in the third winding drum 13 through a connecting belt, a second motor 14 is installed at one end of the third winding drum 13, the output end of the second motor 14 is installed between the third winding roller 41, a second empty groove 45 is provided on the inner wall of the second dustproof frame 11, and the second empty groove A second pressing strip 46 is arranged in 45, a screw hole is provided on the outer wall of the second dust-proof frame 11, and the screw hole is adapted to be installed with the corresponding second screw rod 12, one end of the second screw rod 12 is installed with the bearing seat installed on the second pressing strip 46 through a bearing, and the second pressing strip 46 presses the second dust-proof net 42, and a plurality of second dust-blocking brushes 48 are arranged at the top opening of the fourth winding drum 15; the first dust-proof mechanism includes a first dust-proof frame 7 arranged at the through opening, a heat dissipation fan frame 10 is installed on the outer wall of the first dust-proof frame 7, a heat dissipation fan is installed in the heat dissipation fan frame 10, the first dust-proof frame 7 is provided with a through groove connected with the upper and lower parts, a first winding drum 6 and a second winding drum 8 are arranged on the outer wall of the protective box 3, and a pair of A second winding roller 52 for winding up the first dust-proof net, one end of the first dust-proof net passes through the through slot provided on the first dust-proof frame 7, and one end of the first dust-proof net is installed between the first winding roller 49 through a connecting belt, a first motor 9 is installed at one end of the first winding drum 6, and the output end of the first motor 9 is installed between the first winding roller 49, and the first winding roller 49 winds up the first dust-proof net, a first empty slot 50 is provided on the inner wall of the first dust-proof frame 7, a first pressing strip 51 is provided in the first empty slot 50, a screw hole is provided on the outer wall of the first dust-proof frame 7, and the corresponding screw hole is adapted to be installed between the first screw rod, one end of the first screw is installed with the bearing seat installed on the first pressing strip 51 through a bearing, and the first pressing strip 51 presses the first dust-proof net. Working, the inner wall of the second winding drum 8 is located at the top and a plurality of first dust-proof brushes 53 are arranged. When the first dust-proof net or the second dust-proof net 42 needs to be replaced, the first screw on the first dust-proof frame 7 is rotated to loosen the first pressing strip 51 that presses the first dust-proof net, and the first motor 9 on the first winding drum 6 works to drive the first winding roller 49 in the first winding drum 6 to rotate, and the corresponding first dust-proof net will slowly move upwards, and the first dust-proof net wound up in the second winding drum 8 will be rolled out, and the first dust-proof net that needs to be replaced will be replaced and placed in the first dust-proof frame 7, and dust prevention work will be performed at the first dust-proof frame 7, and the replaced first dust-proof net will be wound up on the first winding roller 49, and the replacement of the first dust-proof net is completed.

[0015] See also Figure 1 , Figure 3 and Figure 4 The moving mechanism includes a U-shaped seat 21 installed on the top of the support column 18, and a first servo motor 22 is fixedly installed at one end of the U-shaped seat 21. The output end of the first servo motor 22 is installed between the first transmission screw 23, and one end of the first transmission screw 23 is installed with a bearing seat installed on the U-shaped seat 21 through a bearing. The first transmission screw 23 is adapted to be installed with a wire sleeve block 24 installed on the heat dissipation fin seat 19, and a plurality of heat dissipation fins 20 are installed on the heat dissipation fin seat 19. When the first servo motor 22 works, it drives the first transmission screw 23 to rotate. While the first transmission screw 23 rotates, it can drive the heat dissipation fins 20 to move and move to a suitable position. The heat dissipation fins 20 are located below the dust cover 25 and above the support cover 29.

[0016] See also Figure 1 , Figure 3 and Figure 4The cleaning assembly includes a first cylinder 4 installed on the top of the protective box 3 and an L-shaped column 26 installed at the bottom of the U-shaped seat 21. The output end of the first cylinder 4 is installed with the top of the dust hood 25. The top interface of the dust hood 25 is installed with the air outlet pipe 5 through a hose. One end of the air outlet pipe 5 is installed with the dust suction fan through a hose. One end of the L-shaped column 26 is fixedly installed with the connecting seat 27. The bottom of the connecting seat 27 is fixedly installed with a second cylinder 28. The output end of the second cylinder 28 is fixedly connected with the support cover 29. One end of the support cover 29 is fixedly connected with the support cover 29. A second servo motor 30 is fixedly installed, the output end of the second servo motor 30 is connected to one end of a second transmission screw 31, the other end of the second transmission screw 31 is installed with a bearing seat installed on the inner wall of the support cover 29 through a bearing, and the second transmission screw 31 is also adapted to be installed between a transmission block 32, a plurality of support strips 33 are arranged on the top of the transmission block 32, a plurality of cleaning brushes 34 are arranged on the outer wall of the support strips 33, and sliders 35 are arranged at both ends of the transmission block 32, and the sliders 35 move in the slide grooves 36 opened on the inner wall of the support cover 29, and the support strips 33 are arranged on the outer wall of the support cover 29. The strip 33 is inserted into the gap between two adjacent heat sink fins 20, and the first servo motor 22 in the moving mechanism works to drive the first transmission screw 23 to rotate. While the first transmission screw 23 rotates, the heat sink 20 can be driven to move and move to a suitable position. The heat sink 20 is located below the dust cover 25 and above the support cover 29. The second cylinder 28 at the bottom of the connecting seat 27 works to drive the support cover 29 to move upward, and the first cylinder 4 drives the dust cover 25 to move downward, so that the dust cover 25 is on the top of the heat sink fin seat 19. The support cover 29 covers the bottom of the heat sink seat 19 to completely cover the heat sink 20, and the support strip 33 on the transmission block 32 is inserted into the gap in the heat sink 20. The second servo motor 30 works to drive the second transmission screw 31 to rotate, so that the support strip 33 on the transmission block 32 moves back and forth, and the cleaning brush 34 on the support strip 33 wipes the dust on the heat sink 20. Combined with the dust suction fan, the wiped dust can be sucked into the collection box to complete the cleaning work of the heat sink 20.

[0017] See also Figure 1 and Figure 7 A plurality of limit assemblies for limiting and fixing the box door 2 are arranged on both sides of the protection box 3. The limit assemblies include a support block 38 fixedly mounted on the protection box 3, a third cylinder 39 is mounted on the support block 38, and an output end of the third cylinder 39 is installed between a limit rod 40, and the limit rod 40 is inserted into a corresponding through hole opened on the box door 2.

[0018] A method for using a dry-type power transformer comprises the following steps: Steps for replacing the dust-proof net: when the first dust-proof net or the second dust-proof net 42 needs to be replaced, the first screw on the first dust-proof frame 7 is rotated to loosen the first pressing strip 51 that presses the first dust-proof net, and the first motor 9 on the first winding drum 6 works to drive the first winding roller 49 in the first winding drum 6 to rotate, and the corresponding first dust-proof net will slowly move upward, and the first dust-proof net wound in the second winding drum 8 will be rolled out, and the first dust-proof net that needs to be replaced is replaced and placed in the first dust-proof frame 7, and dust prevention work is performed in the first dust-proof frame 7, and the replaced first dust-proof net will be wound on the first winding roller 49, completing the replacement of the first dust-proof net; Steps for cleaning dust on the heat sink fins 20: the first servo motor 22 in the moving mechanism works to drive the first transmission screw 23 to rotate. When the first transmission screw 23 rotates, the heat sink fins 20 can be driven to move and move to a suitable position. The heat sink fins 20 are located below the dust cover 25 and above the support cover 29. The second cylinder 28 at the bottom of the connecting seat 27 works to drive the support cover 29 to move upward. The first cylinder 4 drives the dust cover 25 to move downward, so that the dust cover 25 cleans the top of the heat sink fin seat 19. The support cover 29 covers the bottom of the heat sink fin seat 19 to completely cover the heat sink fins 20, and the support strips 33 on the transmission block 32 are inserted into the gaps in the heat sink fins 20. The second servo motor 30 works to drive the second transmission screw 31 to rotate, so that the support strips 33 on the transmission block 32 move back and forth. The cleaning brush 34 on the support strips 33 wipes the dust on the heat sink fins 20. Combined with the dust suction fan, the wiped dust can be sucked into the collection box to complete the cleaning of the heat sink fins 20.

[0019] The implementation principle of a dry-type power transformer in an embodiment of the present invention is as follows: a heat sink 20 is installed above a transformer body 17 installed in a protective box 3 to perform a heat dissipation function on the transformer body 17. When the heat sink 20 is used for a long time, some dust will accumulate on the surface of the heat sink 20. The accumulation of dust will reduce the heat dissipation effect of the heat sink 20. When the heat sink 20 needs to be cleaned of dust, the first servo motor 22 in the moving mechanism works to drive the first transmission screw 23 to rotate. When the first transmission screw 23 rotates, it drives The heat dissipation fin 20 moves to a suitable position, and the heat dissipation fin 20 is located below the dust cover 25 and above the support cover 29. At this time, the second cylinder 28 at the bottom of the connecting seat 27 works to drive the support cover 29 to move upward, and the first cylinder 4 drives the dust cover 25 to move downward, so that the dust cover 25 covers the top of the heat dissipation fin seat 19, and the support cover 29 covers the bottom of the heat dissipation fin seat 19, so that the heat dissipation fin 20 is completely covered, and the support strip 33 on the transmission block 32 is inserted into the gap in the heat dissipation fin 20. The second servo motor 30 works to drive the second transmission screw 31 to rotate, so that the support plug 33 on the transmission block 32 moves back and forth, and the cleaning brush 34 on the support plug 33 wipes the dust on the heat sink 20. Combined with the dust suction fan, the wiped dust can be sucked into the collection box to complete the cleaning of the heat sink 20. After cleaning, the moving mechanism drives the heat sink 20 to return to its original position. When the first dustproof net or the second dustproof net 42 needs to be replaced, the first screw on the first dustproof frame 7 is rotated to replace the first dustproof net. The first pressing strip 51 which compresses the net is loosened, and the first motor 9 on the first winding drum 6 starts to work, driving the first winding roller 49 in the first winding drum 6 to rotate, and the corresponding first dust-proof net will slowly move upwards, and the first dust-proof net wound in the second winding drum 8 will be rolled out, and the first dust-proof net that needs to be replaced is replaced and placed in the first dust-proof frame 7, and dust-proof work is performed in the first dust-proof frame 7, and the replaced first dust-proof net will be rolled up on the first winding roller 49, completing the replacement of the first dust-proof net, and the operation is more flexible and the functionality is stronger.

[0020] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A dry-type power transformer, comprising a support base (1), a protection box (3) being mounted on the top of the support base (1), openings being provided on both sides of the protection box (3), and being hingedly connected to a box door (2) at the openings, characterized in that: The protective box (3) is provided with openings on both side walls, and a first dustproof mechanism and a second dustproof mechanism are respectively installed at the openings; a support seat (16) is fixedly installed on the top of the support base (1), and a transformer body (17) is fixedly installed on the support seat (16); two symmetrical support columns (18) are arranged on the top of the support base (1); a moving mechanism is installed on the top of the support column (18), and the moving structure drives the heat dissipation fin seat (19) to move; the heat dissipation fin seat (19) is located above the transformer body (17); and a cleaning component for cleaning dust on the heat dissipation fin seat (19) is also arranged in the protective box (3); The second dustproof mechanism comprises a second dustproof frame (11) installed at the opening of the protection box (3), a third winding drum (13) and a fourth winding drum (15) are installed on the outer wall of the protection box (3), the second dustproof frame (11) is provided with a through groove connected to each other up and down, a fourth winding roller (47) is installed in the fourth winding drum (15), and the fourth winding roller (47) winds up the second dustproof net (42), one end of the second dustproof net (42) passes through the through groove provided in the second dustproof frame (11), and one end of the second dustproof net (42) is connected to the third winding roller (41) in the third winding drum (13) through a connecting belt, and one end of the third winding drum (13) is installed A second motor (14) is provided, the output end of the second motor (14) is installed between the third winding roller (41), a second slot (45) is provided on the inner wall of the second dustproof frame (11), a second pressing strip (46) is provided in the second slot (45), a screw hole is provided on the outer wall of the second dustproof frame (11), and the screw hole is adapted to be installed with the corresponding second screw rod (12), one end of the second screw rod (12) is installed with a bearing seat installed on the second pressing strip (46) through a bearing, the second pressing strip (46) presses the second dustproof net (42), and a plurality of second dust-blocking brushes (48) are provided at the top opening of the fourth winding roller (15); The first dustproof mechanism comprises a first dustproof frame (7) arranged at the opening, a heat dissipation fan frame (10) is installed on the outer wall of the first dustproof frame (7), a heat dissipation fan is installed in the heat dissipation fan frame (10), the first dustproof frame (7) is provided with a through slot connected to the upper and lower parts, a first winding drum (6) and a second winding drum (8) are arranged on the outer wall of the protection box (3), a second winding roller (52) for winding up the first dustproof net is installed in the second winding drum (8), one end of the first dustproof net passes through the through slot provided on the first dustproof frame (7), and one end of the first dustproof net is installed between the first winding roller (49) through a connecting belt, and one end of the first winding drum (6) is provided with a second winding roller (52) for winding up the first dustproof net. A motor (9), wherein the output end of the first motor (9) is installed between the first winding roller (49), the first winding roller (49) winds up the first dustproof net, a first empty groove (50) is provided on the inner wall of the first dustproof frame (7), a first clamping strip (51) is provided in the first empty groove (50), a screw hole is provided on the outer wall of the first dustproof frame (7), and the corresponding screw hole is adapted to be installed between the first screw rod, one end of the first screw rod is installed with a bearing seat installed on the first clamping strip (51) through a bearing, the first clamping strip (51) clamps the first dustproof net, and a plurality of first dust-blocking brushes (53) are provided at the top of the inner wall of the second winding roller (8).

2. A dry-type power transformer according to claim 1, characterized in that: The moving mechanism comprises a U-shaped seat (21) installed on the top of the support column (18), a first servo motor (22) is fixedly installed on one end of the U-shaped seat (21), an output end of the first servo motor (22) is installed between a first transmission screw (23), one end of the first transmission screw (23) is installed with a bearing seat installed on the U-shaped seat (21) through a bearing, the first transmission screw (23) is adapted to be installed between a thread sleeve block (24) installed on a heat dissipation fin seat (19), and a plurality of heat dissipation fins (20) are installed on the heat dissipation fin seat (19).

3. A dry-type power transformer according to claim 1, characterized in that: The cleaning assembly comprises a first cylinder (4) installed on the top of the protective box (3) and an L-shaped column (26) installed on the bottom of the U-shaped seat (21), the output end of the first cylinder (4) is installed on the top of the dust hood (25), the top interface of the dust hood (25) is installed on the air outlet pipe (5) through a hose, and one end of the air outlet pipe (5) is installed on the dust suction fan through a hose.

4. A dry-type power transformer according to claim 3, characterized in that: One end of the L-shaped column (26) is fixedly mounted on the connecting seat (27); a second cylinder (28) is fixedly mounted on the bottom of the connecting seat (27); an output end of the second cylinder (28) is fixedly connected to a support cover (29); a second servo motor (30) is fixedly mounted on one end of the support cover (29); the output end of the second servo motor (30) is connected to one end of a second transmission screw rod (31); the other end of the second transmission screw rod (31) is connected to a bearing mounted on the inner wall of the support cover (29). The second transmission screw (31) is also adapted to be installed between the transmission block (32); a plurality of support strips (33) are arranged on the top of the transmission block (32); a plurality of cleaning brushes (34) are arranged on the outer wall of the support strips (33); sliders (35) are arranged at both ends of the transmission block (32); the sliders (35) move in a slide groove (36) provided on the inner wall of the support cover (29); and the support strips (33) are inserted into the gap between two adjacent heat dissipation fins (20).

5. A dry-type power transformer according to claim 1, characterized in that: A plurality of limit assemblies for limiting and fixing the box door (2) are arranged on both sides of the protection box (3), and the limit assemblies include a support block (38) fixedly mounted on the protection box (3), a third cylinder (39) being mounted on the support block (38), an output end of the third cylinder (39) being mounted between a limit rod (40), and the limit rod (40) being inserted into a corresponding through hole provided on the box door (2).

6. A method for using a dry-type power transformer, according to a dry-type transformer according to any one of claims 1 to 5, characterized in that: The following steps are involved: Steps for replacing the dust-proof net: when the first dust-proof net or the second dust-proof net (42) needs to be replaced, the first screw on the first dust-proof frame (7) is rotated to loosen the first pressing strip (51) that presses the first dust-proof net, and the first motor (9) on the first winding drum (6) is operated to drive the first winding roller (49) in the first winding drum (6) to rotate, and the corresponding first dust-proof net will slowly move upward, and the first dust-proof net wound in the second winding drum (8) will be rolled out, and the first dust-proof net that needs to be replaced is replaced and placed in the first dust-proof frame (7), and dust prevention work is performed in the first dust-proof frame (7), and the replaced first dust-proof net will be rolled up on the first winding roller (49), completing the replacement of the first dust-proof net; The steps of cleaning dust on the heat sink fins (20) are as follows: the first servo motor (22) in the moving mechanism is operated to drive the first transmission screw (23) to rotate. When the first transmission screw (23) rotates, the heat sink fins (20) can be driven to move and move to a suitable position. The heat sink fins (20) are located below the dust cover (25) and above the support cover (29). The second cylinder (28) at the bottom of the connecting seat (27) is operated to drive the support cover (29) to move upward. The first cylinder (4) drives the dust cover (25) to move downward, so that the dust cover (25) moves against the top of the heat sink fin seat (19). The support cover (29) covers the bottom of the heat sink seat (19) to completely cover the heat sink (20), and the support strip (33) on the transmission block (32) is inserted into the gap in the heat sink (20). The second servo motor (30) works to drive the second transmission screw (31) to rotate, so that the support strip (33) on the transmission block (32) moves back and forth. The cleaning brush (34) on the support strip (33) wipes the dust on the heat sink (20). In combination with the dust suction fan, the wiped dust can be sucked into the collection box, thereby completing the cleaning work of the heat sink (20).

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