An air-cooled photovoltaic step-up transformer and its auxiliary equipment

Abstract

The present invention discloses a photovoltaic step-up transformer with air-cooling heat dissipation and its auxiliary equipment, including a transformer protection box. A number of groups of heat dissipation blocks are symmetrically installed on both sides of the transformer protection box, and heat exchange windows are penetrated and opened between every two adjacent groups of heat dissipation blocks corresponding to each side of the transformer protection box. By setting the air box to work, external air is pumped into the heat dissipation plate, and the heat exchange copper tube extending into the heat dissipation plate is used to accelerate the cooling of the heat dissipation plate. And during the air exchange process, gas is discharged to the outside through a one-way air valve, so that the air flow inside the heat dissipation block is accelerated, which can better improve the heat dissipation effect of the transformer protection box. At the same time, because the heat dissipation plate is located between two adjacent voltage transformation structures and the headquarters, the temperature between each group of voltage transformation structures can be quickly reduced by the incoming heat dissipation plate, thereby better completing the cooling inside the transformer protection box, completing the protection of the voltage transformation structure, and reducing energy consumption at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of power equipment, and specifically relates to a photovoltaic step-up transformer with air-cooled heat dissipation and its auxiliary equipment. Background Art

[0002] The output of photovoltaic power generation fluctuates with the change of radiation value. When operating in grid-connected power generation during the day, the step-up transformer is in the working state, and the power flow direction is from the photovoltaic bus side to the grid side, belonging to the load power generation mode; when in the standby state without power generation, the photovoltaic step-up transformer remains grid-connected. At this time, a large number of step-up transformers are in no-load operation, belonging to the load power consumption mode, and the photovoltaic transformer will generate heat during operation.

[0003] According to the authorized announcement number CN 214705658 U, there is disclosed a highly stable photovoltaic transformer with good heat dissipation performance, including a photovoltaic transformer main body, a plurality of heat dissipation fins, connection terminals, a first heat dissipation mechanism, a second heat dissipation mechanism, and a positioning mechanism. The plurality of heat dissipation fins are uniformly arranged and installed on the side wall of the photovoltaic transformer main body. The connection terminals are located at the top of the photovoltaic transformer main body. A base is provided at the bottom of the photovoltaic transformer main body, and an installation seat is connected to the bottom of the base. The first heat dissipation mechanism is located above the base. By setting the first heat dissipation mechanism and the second heat dissipation mechanism, continuous heat dissipation work can be carried out on the first heat dissipation mechanism. When the heat inside the photovoltaic transformer main body continuously rises and reaches a set value, the second heat dissipation mechanism is started. At this time, the first heat dissipation mechanism and the second heat dissipation mechanism can be used to carry out heat dissipation work synchronously to ensure the heat dissipation effect.

[0004] During the use of the above patent, there are still problems that the direct temperature of the internal structure of the transformer cannot be improved more directly, and only the external structure of the transformer can be cooled from the outside, resulting in poor cooling effect. Therefore, there is a need for a photovoltaic step-up transformer with air-cooled heat dissipation and its auxiliary equipment. Summary of the Invention

[0005] The purpose of the present invention is to provide a photovoltaic step-up transformer with air-cooled heat dissipation and its auxiliary equipment, which can improve the temperature between adjacent two groups of voltage transformation structures through the cooperation of an air box and a heat dissipation plate, and ensure the air flow between adjacent two groups of heat dissipation blocks, greatly improving the heat dissipation effect of the transformer protection box, so as to solve the technical problems mentioned in the background art.

[0006] To achieve the above object, the present invention provides the following technical solutions: A photovoltaic step-up transformer with air cooling and its auxiliary equipment, including a transformer protection box, on both sides of which a number of groups of heat dissipation blocks are symmetrically installed. Heat exchange windows are penetrated and opened between every two adjacent groups of heat dissipation blocks on each side of the transformer protection box. Sealing oil plates are hermetically installed at the positions corresponding to each group of heat exchange windows on the outer side of the transformer protection box. A number of groups of one-way air valves are hermetically installed at equal intervals inside the sealing oil plates. A number of groups of voltage transformation structures are arranged inside the transformer protection box. A heat dissipation plate is arranged between every two adjacent voltage transformation structures inside the transformer protection box. And a connecting plug board is clamped and installed at both ends of each heat dissipation plate. Each connecting plug board is inserted into the corresponding heat exchange window. A bottom sealing plate is hermetically installed at the bottom of the transformer protection box. A number of groups of heat exchange copper tubes are arranged at the upper part of each bottom sealing plate corresponding to the positions of each heat dissipation plate;

[0007] The bottom of the transformer protection box is bolted and installed with a bottom box. An air box is embedded and installed inside the bottom box. Protection filters are bolted and installed on both sides of the air box.

[0008] Preferably, clamping grooves are opened at the positions corresponding to each group of heat exchange windows on the inner wall of the transformer protection box. The heat dissipation plate is of a hollow structure. A positioning block is installed on the outer side of both ends of the heat dissipation plate. The connecting plug board is bolted and installed with the positioning block. The outer end of the connecting plug board is communicated and installed with the sealing oil plate. One end of the one-way air valve extends into the connecting plug board.

[0009] Preferably, a barrier filter is clamped and installed at the position corresponding to the positioning block on the connecting plug board. Porous filter materials are filled in the connecting plug board and the barrier filter.

[0010] Preferably, a connecting baffle is communicated and installed at the top end of the bottom sealing plate. The heat exchange copper tube is installed at the top end of the connecting baffle. The connecting baffle is bolted and installed in contact with the bottom surface of the heat dissipation plate. And the heat exchange copper tube extends into the heat dissipation plate and is hermetically installed. A connecting seat is arranged at the bottom of the voltage transformation structure. The connecting seat is bolted to the upper part of the bottom sealing plate.

[0011] Preferably, a conical connecting seat is installed at the top end of the transformer protection box. A porous filter plate is embedded and installed inside the conical connecting seat. Air vents are penetrated and installed on the front and rear sides of the conical connecting seat. A sealing plate is bolted and installed at the top end of the conical connecting seat. A number of groups of transformer bushings are arranged on the upper part of the sealing plate.

[0012] Preferably, air inlet windows are penetrated and opened on the front and rear sides of the bottom box. The protection filter extends out from inside the air inlet window. Cleaning cotton is arranged inside the protection filter. A positioning frame is arranged at the output end of the air box. An air outlet cover is bolted and installed at the top end of the positioning frame.

[0013] Preferably, a first connecting plate is bolted and installed at the top end of the bottom box. The first connecting plate is bolted and installed with the bottom sealing plate. A docking jack is penetrated and opened at the position of the first connecting plate corresponding to the air outlet cover. The air outlet cover extends out from the inside of the docking jack, and the air outlet cover is embedded and installed at the bottom of the bottom sealing plate.

[0014] Another aspect of the present invention provides an auxiliary device for an air-cooled photovoltaic step-up transformer, including a control box and an oil conservator installed outside the transformer protection box;

[0015] An inverter and a control unit are installed in the control box;

[0016] It further includes a bottom plate installed at the bottom of the bottom box. Two square tubes are embedded in the bottom plate. A stress plate is movably installed inside each group of square tubes, and a connecting structure is movably installed inside each group of stress plates;

[0017] The connecting structure includes two connecting blocks. Two second connecting plates are movably installed on both sides of each group of connecting blocks, and the two second connecting plates on the left and right same sides are locked and connected by locking bolts.

[0018] Preferably, two first chutes are symmetrically opened at the bottom of each group of square tubes. A tightening bolt is threadedly installed on each side of each stress plate, and two second chutes are symmetrically opened at the bottom of each stress plate.

[0019] Preferably, an inner slider is installed on the upper surface of one of the connecting blocks. The inner slider is slidably installed inside the second chute. A number of limiting rods are installed on one side of each group of second connecting plates corresponding to the connecting block. Each group of limiting rods is slidably installed inside the connecting block, and protective rubber pads are fitted and installed on the corresponding sides of the two second connecting plates on the left and right same sides.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. By setting the air box to work, the external air is pumped into the heat dissipation plate, and the heat exchange copper tube extending into the heat dissipation plate is used to accelerate the cooling of the heat dissipation plate. And during the air exchange process, the gas is discharged to the outside through the one-way air valve, so that the air flow inside the heat dissipation block is accelerated, which can better improve the heat dissipation effect of the transformer protection box. At the same time, because the heat dissipation plate is located between two adjacent voltage transformation structures and the headquarters, the temperature between each group of voltage transformation structures can be quickly reduced by the entering heat dissipation plate, and then the temperature inside the transformer protection box can be better reduced, the protection of the voltage transformation structure can be completed, and the energy consumption can be reduced at the same time, so as to better and efficiently balance the temperature inside the transformer protection box and improve the overall service life of the device.

[0022] 2. The staff can pull up the connection structure by tightening the bolts, making the connection structure fit more tightly against the external structure to complete locking, avoiding loosening of the connection structure. Moreover, the connection structure is composed of a movable second connecting plate, enabling various choices for the overall connection structure and the external fixed position, greatly enhancing the selectivity of the device's locking position and the stability after locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the structure of the present invention;

[0024] Figure 2 Schematic diagram of the split installation structure of the bottom box of the present invention;

[0025] Figure 3 Schematic diagram of the installation structure of the heat dissipation plate of the present invention;

[0026] Figure 4 Schematic diagram of the split installation structure of the heat dissipation plate of the present invention;

[0027] Figure 5 Schematic diagram of the split installation structure of the connection plug of the present invention;

[0028] Figure 6 Schematic diagram of the split installation structure of the conical connection seat of the present invention;

[0029] Figure 7 Schematic diagram of the split installation structure of the air box of the present invention;

[0030] Figure 8 Schematic diagram of the installation structure of the protection filter of the present invention;

[0031] Figure 9 Schematic diagram of the split installation structure of the connection structure of the present invention;

[0032] Figure 10 Schematic diagram of the split installation structure of the stress plate of the present invention;

[0033] Figure 11 Schematic diagram of the split overall structure of the connection structure of the present invention.

[0034] In the figure: 1. Transformer protection box; 2. Heat dissipation block; 3. Heat exchange window; 4. Card slot; 5. Heat dissipation plate; 6. Positioning block; 7. Connecting plug board; 8. Barrier filter screen; 9. Porous filter material; 10. Voltage transformation structure; 11. Connecting seat; 12. Bottom sealing plate; 13. Connecting baffle; 14. Conical connecting seat; 15. Porous filter plate; 16. Air outlet; 17. Sealing plate; 18. Transformer porcelain bushing; 19. Bottom box; 20. Air inlet window; 21. Air box; 22. Protection filter screen; 23. Cleaning cotton; 24. Positioning frame; 25. Air outlet cover; 26. First connecting plate; 27. Docking jack; 28. Triangular connecting frame; 29. Bottom plate; 30. Square pipe; 31. First sliding groove; 32. Stress plate; 33. Tightening bolt; 34. Second sliding groove; 35. Connecting structure; 36. Inner slider; 37. Connecting block; 38. Second connecting plate; 39. Limiting rod; 40. Protection rubber pad; 41. Locking bolt; 42. Control box; 43. Oil conservator; 44. Oil sealing plate; 45. One-way air valve; 46. Heat exchange copper pipe. Detailed implementation manners

[0035] To further understand the content, features and effects of the present invention, the following embodiments are cited and described in detail in conjunction with the accompanying drawings as follows.

[0036] Now, various exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that: unless otherwise specifically stated, the relative arrangements, numerical expressions and values of the components and steps set forth in these embodiments do not limit the scope of the present invention. The description of at least one exemplary embodiment is actually merely illustrative and in no way restricts the present invention and its application or use.

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] The present invention provides: a photovoltaic step-up transformer with air-cooled heat dissipation and its auxiliary equipment, such as Figures 1 - 11As shown, it includes a transformer protection box 1. A number of groups of heat dissipation blocks 2 are symmetrically installed on both sides of the transformer protection box 1. Heat exchange windows 3 are penetrated and opened between every two adjacent groups of heat dissipation blocks 2 on each side of the transformer protection box 1. Sealing oil plates 44 are hermetically installed at the positions corresponding to each group of heat exchange windows 3 on the outer side of the transformer protection box 1. A number of groups of one-way air valves 45 are hermetically installed at equal intervals inside the sealing oil plates 44. A number of groups of voltage transformation structures 10 are arranged inside the transformer protection box 1. A heat dissipation plate 5 is arranged between every two adjacent voltage transformation structures 10 inside the transformer protection box 1. And a connecting plug board 7 is respectively clamped and installed at both ends of each heat dissipation plate 5. Each connecting plug board 7 is inserted into the corresponding heat exchange window 3 inside. A bottom sealing plate 12 is hermetically installed at the bottom of the transformer protection box 1. A number of groups of heat exchange copper tubes 46 are arranged at the positions corresponding to each heat dissipation plate 5 on the upper part of each bottom sealing plate 12. A bottom box 19 is bolted and installed at the bottom of the transformer protection box 1. An air box 21 is embedded and installed inside the bottom box 19. Protection filters 22 are bolted and installed on both sides of the air box 21.

[0039] Preferably, clamping grooves 4 are opened at the positions of the inner wall of the transformer protection box 1 corresponding to each group of heat exchange windows 3. The heat dissipation plate 5 is of a hollow structure. A positioning block 6 is respectively installed on the outer sides of both ends of the heat dissipation plate 5. The connecting plug board 7 is bolted and installed with the positioning block 6. The outer end of the connecting plug board 7 is communicated and installed with the sealing oil plate 44. One end of the one-way air valve 45 extends into the connecting plug board 7. When the air box 21 works, the external air is pumped from the inside of the air box 21 into the heat dissipation plate 5 through the heat exchange windows 3 opened between every two adjacent groups of heat dissipation blocks 2 on the front and back sides of the transformer protection box 1, and it is ensured that each heat dissipation plate 5 is located between two adjacent voltage transformation structures 10 to improve the internal temperature of the transformer protection box 1. The sealing oil plate 44 arranged on the outer side of the transformer protection box 1 seals the heat exchange windows 3, and the one-way air valves 45 on the outer side of the sealing oil plate 44 can ensure the discharge of the gas inside the heat dissipation plate 5, thereby driving the air between two adjacent heat dissipation blocks 2, so as to further enhance the cooling of the transformer protection box 1.

[0040] Furthermore, a barrier filter 8 is clamped and installed at the position of the connecting plug board 7 corresponding to the positioning block 6. Porous filter materials 9 are filled in the connecting plug board 7 and the barrier filter 8. The arranged barrier filter 8 blocks and filters the output end of the connecting plug board 7, and the filled porous filter materials 9 are used to filter the dust and impurities in the air to ensure the cleanliness inside the heat dissipation plate 5 during use and avoid the influence on the air cooling structure during use.

[0041] It is worth noting that a connecting baffle 13 is connected and installed at the top end of the bottom sealing plate 12. The heat exchange copper tube 46 is installed at the top end of the connecting baffle 13. The connecting baffle 13 is bolted and installed in contact with the bottom surface of the heat dissipation plate 5, and the heat exchange copper tube 46 extends into the heat dissipation plate 5 and is hermetically installed. A connecting seat 11 is arranged at the bottom of the voltage transformation structure 10. The connecting baffle 13 connects the heat dissipation plate 5 and ensures that the heat exchange copper tube 46 extends into the heat dissipation plate 5 to conduct heat. At the same time, due to the connection between the connecting baffle 13 and the heat dissipation plate 5, external cold air can quickly enter the heat dissipation plate 5 and then be discharged from the one-way air valve 45, so as to accelerate the cooling of the heat dissipation plate 5, and thus better complete the temperature reduction of the voltage transformation structure 10.

[0042] Specifically, a conical connecting seat 14 is installed at the top end of the transformer protection box 1. A porous filter plate 15 is embedded in the conical connecting seat 14. Air vents 16 are installed through the front and rear sides of the conical connecting seat 14. A sealing plate 17 is bolted and installed at the top end of the conical connecting seat 14. A number of groups of transformer bushings 18 are arranged on the upper part of the sealing plate 17. The conical connecting seat 14 and the porous filter plate 15 installed at the top end of the transformer protection box 1 form a cavity. The opened air vents 16 can assist external cold air to enter and can also form a negative pressure when the air box 21 works to draw out external air by itself, so as to cool the temperature inside the transformer protection box 1, greatly improving the safety of the device during use and the service life of the voltage transformation structure 10.

[0043] In addition, air inlet windows 20 are opened through the front and rear sides of the bottom box 19. The protection filter screen 22 extends out from inside the air inlet windows 20. A cleaning cotton 23 is arranged inside the protection filter screen 22. A positioning frame 24 is arranged at the output end of the air box 21. An air outlet cover 25 is bolted and installed at the top end of the positioning frame 24. The air inlet windows 20 opened on the front and rear sides of the bottom box 19 limit the protection filter screens 22 on both sides of the air box 21, so as to better limit the use of the air box 21. The cleaning cotton 23 installed inside the protection filter screen 22 is used to prevent external mosquitoes and dust from entering the device through the air outlet, so as to improve the protection of the device. The positioning frame 24 at the output end of the air box 21 limits the air outlet cover 25, so that the air outlet cover 25 can be stably clamped with the bottom sealing plate 12, so as to ensure the extraction of the high-temperature gas inside the transformer protection box 1 and meet the temperature reduction requirements of the transformer protection box 1.

[0044] Specifically, a first connecting plate 26 is bolted and installed at the top end of the bottom box 19. The first connecting plate 26 is bolted and installed with the bottom sealing plate 12. A docking jack 27 is opened through the first connecting plate 26 corresponding to the position of the air outlet cover 25. The air outlet cover 25 extends out from inside the docking jack 27. The air outlet cover 25 is embedded and installed at the bottom of the bottom sealing plate 12. The first connecting plate 26 bolted at the top end of the bottom box 19 limits the air outlet cover 25. The air outlet cover 25 is clamped into the bottom sealing plate 12 to prevent gaps at the air extraction position, resulting in unstable extraction of the gas inside the transformer protection box 1.

[0045] An accessory device for a photovoltaic step-up transformer with air cooling, comprising a control box 42 and an oil conservator 43 installed outside the transformer protection box 1; an inverter and a control unit are installed in the control box 42; it also includes a bottom plate 29 installed at the bottom of the bottom box 19, and two groups of square tubes 30 are embedded inside the bottom plate 29. A group of stress plates 32 are movably installed inside each group of square tubes 30, and a group of connection structures 35 are movably installed inside each group of stress plates 32; the connection structure 35 includes two groups of connection blocks 37, and two groups of second connecting plates 38 are movably installed on both sides of each group of connection blocks 37. The two groups of second connecting plates 38 on the same left and right sides are tightly locked by a locking bolt 41.

[0046] Preferably, two first chutes 31 are symmetrically opened at the bottom of each group of square tubes 30. A group of tightening bolts 33 are respectively threadedly installed on both sides of each group of stress plates 32. Two second chutes 34 are symmetrically opened at the bottom of the stress plate 32. The provided bottom plate 29 limits the position of the square tubes 30, and the square tubes 30 can ensure the use position of the stress plates 32. Thus, after rotating the tightening bolts 33 to the tightened locking position, the stress plates 32 can be lifted, enabling the connection structure 35 to be tightened at the locking position, thereby better improving the installation stability of the device.

[0047] Furthermore, an inner slider 36 is installed on the upper surface of one of the connection blocks 37, and the inner slider 36 is slidably installed inside the second chute 34. A number of limiting rods 39 are installed on one side of each group of second connecting plates 38 corresponding to the connection block 37, and each group of limiting rods 39 is slidably installed inside the connection block 37. Protective rubber pads 40 are adhesively installed on the corresponding sides of the two groups of second connecting plates 38 on the same left and right sides. The upper part of the connection block 37 is installed with the inner slider 36 sliding inside the second chute 34, enabling the overall use position of the connection structure 35 to be adjusted. The limiting rods 39 installed on one side of the second connecting plate 38 are inserted into the connection block 37, enabling the two groups of second connecting plates 38 to be adjusted adaptively, making the locking of the connection structure 35 with the external structure more stable. Moreover, the installed protective rubber pads 40 can protect the connection position, further improving the installation stability of the device.

[0048] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A photovoltaic step-up transformer with air cooling and heat dissipation, characterized in that: include Transformer protection box (1); A plurality of groups of heat sinks (2) are symmetrically mounted on both sides of the transformer protection box (1); a heat exchange window (3) is provided between two adjacent groups of heat sinks (2) on each side of the transformer protection box (1); The inner wall of the transformer protection box (1) is provided with slots (4) corresponding to the positions of each group of heat exchange windows (3); the heat sink (5) is a hollow structure; a group of positioning blocks (6) are respectively installed on the outer sides of both ends of the heat sink (5); and the connecting plug plate (7) is bolted to the positioning blocks (6); The connection plug plate (7) is clamped and installed with a barrier filter (8) at a position corresponding to the positioning block (6), and porous filter materials (9) are filled inside the connection plug plate (7) and the barrier filter (8); A plurality of groups of transformer structures (10) are arranged inside the transformer protection box (1), a group of heat sinks (5) are arranged between each two adjacent groups of transformer structures (10) inside the transformer protection box (1), and a group of connecting plugs (7) are respectively mounted on both ends of each group of heat sinks (5), and each group of connecting plugs (7) is inserted into the heat exchange window (3) on the corresponding side; The transformer protection box (1) is provided with a conical connection seat (14) at the top end, a porous filter plate (15) is embedded in the conical connection seat (14), air vents (16) are installed through the front and rear sides of the conical connection seat (14), a sealing plate (17) is bolted to the top end of the conical connection seat (14), and a plurality of transformer porcelain sleeves (18) are provided on the upper part of the sealing plate (17); A bottom box (19) is bolted to the bottom of the transformer protection box (1), a bellows (21) is embedded in the bottom of the bellows (19), and protective filters (22) are bolted to both sides of the bellows (21); The bottom box (19) is provided with air inlet windows (20) on the front and rear sides thereof, the protective filter (22) extends from the inside of the air inlet window (20), cleaning cotton (23) is arranged inside the protective filter (22), a positioning frame (24) is arranged at the output end of the air box (21), and an air outlet cover (25) is bolted to the top end of the positioning frame (24); A first connecting plate (26) is bolted to the top of the bottom box (19), the first connecting plate (26) is bolted to the bottom sealing plate (12), a docking hole (27) is provided through the first connecting plate (26) at a position corresponding to the air outlet cover (25), the air outlet cover (25) extends from the inside of the docking hole (27), and the air outlet cover (25) is embedded in the bottom of the bottom sealing plate (12).

2. The air-cooled photovoltaic step-up transformer according to claim 1, characterized in that: The bottom of the transformer protection box (1) is bolted with a bottom sealing plate (12), and a plurality of groups of shielding filter plates (13) are installed through the center of the bottom sealing plate (12). The bottom of the transformer structure (10) is provided with a connecting seat (11), and the connecting seat (11) is bolted to the upper part of the bottom sealing plate (12).

3. An auxiliary device of a photovoltaic step-up transformer with air cooling and heat dissipation, characterized in that: A photovoltaic step-up transformer with air cooling and heat dissipation comprising any one of claims 1-2; A control box (42) and an oil level gauge (43) installed outside the transformer protection box (1), wherein an inverter and a control unit are installed in the control box (42); and It also includes a bottom plate (29) installed at the bottom of the bottom box (19), two groups of square tubes (30) are embedded and installed inside the bottom plate (29), a group of force-bearing plates (32) are movably installed inside each group of square tubes (30), and a group of connecting structures (35) are movably installed inside each group of force-bearing plates (32); The connection structure (35) comprises two groups of connection blocks (37), two groups of second connection plates (38) are movably mounted on both sides of each group of connection blocks (37), and the two groups of second connection plates (38) on the same left and right sides are locked and connected by locking bolts (41).

4. The auxiliary equipment of the photovoltaic step-up transformer with air cooling and heat dissipation according to claim 3 is characterized in that: Two groups of first slide grooves (31) are symmetrically formed at the bottom of each group of square tubes (30), a group of tightening bolts (33) are respectively threadedly mounted on both sides of each group of force-bearing plates (32), and two groups of second slide grooves (34) are symmetrically formed at the bottom of the force-bearing plates (32).

5. The auxiliary equipment of the photovoltaic step-up transformer with air cooling and heat dissipation according to claim 4 is characterized in that: An inner slide block (36) is mounted on the upper surface of one group of the connecting blocks (37), and the inner slide block (36) is slidably mounted inside the second slide groove (34). A plurality of groups of limit rods (39) are mounted on one side of each group of the second connecting plates (38) corresponding to the connecting block (37), and each group of the limit rods (39) is slidably mounted inside the connecting block (37). Protective rubber pads (40) are fitted on corresponding sides of the two groups of second connecting plates (38) on the same side.

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