A dry-type transformer for photovoltaic power generation inverter

Abstract

The invention discloses a dry-type transformer for photovoltaic power generation inverter, which belongs to the technical field of dry-type transformers and comprises a dry-type transformer main body, wherein a base is fixedly connected to the bottom of the dry-type transformer main body, and a terminal docking closed module corresponding to a joint terminal is arranged on the outside of the dry-type transformer main body, wherein the terminal docking closed module comprises a back plate, a closed shell, a partition plate and a flip sealing plate. The invention arranges the terminal docking closed module to plan and isolate the area where the joint terminal is located from the outside, so that the joint terminal is in a planned closed space, and the sealing shell completely shields and protects the docking part between the connecting rod and the joint terminal from the outside, and through the operation of the exhaust module, air is allowed to enter from the only air inlet on the closed shell, and moves along a specified route in the closed space after being filtered by a drying box, so that the entry of moisture and the contact time of the joint terminal part are effectively controlled, and the sealing protection effect of the joint terminal part is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of dry-type transformers, and in particular to a dry-type transformer for photovoltaic power generation inversion. Background Art

[0002] With the development of photovoltaic solar power generation technology, dry-type transformers used for inverters are widely used in solar power stations. Dry-type transformers are exposed to the external environment for a long time. The connection parts of the joint terminal and the lead-in rod of the dry-type transformer are exposed to the outside. The connection between the joint terminal and the lead-in rod is provided with an insulating sealing end shell for insulating and sealing. The insulating sealing end shell is easily corroded after long-term use in the external environment, which damages the insulating sealing state. It is impossible to effectively shield and protect the joint terminal and the part of the lead-in rod near the joint terminal on the dry-type transformer from the outside. At the same time, the outside air circulates from all directions to converge to the joint terminal and the lead-in rod, and it is impossible to plan and process the air route in the area where the joint terminal is located, so that the joint terminal and the part of the lead-in rod near the joint terminal retain foreign matter, making the joint terminal and the part of the lead-in rod near the joint terminal more susceptible to erosion, affecting the sealing protection effect of the joint terminal part on the dry-type transformer and affecting the safety of the dry-type transformer. Summary of the invention

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a dry-type transformer for photovoltaic power generation inverter, which is planned and isolated from the outside of the area where the joint terminal is located on the dry-type transformer body by arranging a terminal docking sealing module, so that the joint terminal is in a planned closed space, and the shell completely shields and protects the docking part of the connecting rod and the joint terminal from the outside. Through the operation of the exhaust module, air can enter from the only air inlet on the closed shell, move along a designated route in the closed space after being filtered by the drying box, effectively control the entry of moisture and the contact time of the joint terminal part, and effectively monitor the air state and humidity of the area where the joint terminal is located and the area where the connecting rod is close to the joint terminal by two environmental monitoring heads, thereby improving the sealing protection effect of the joint terminal part on the dry-type transformer body, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A dry-type transformer for photovoltaic power generation inverter, comprising a dry-type transformer main body, a base fixedly connected to the bottom of the dry-type transformer main body, a terminal docking closed module corresponding to the joint terminal is arranged on the outside of the dry-type transformer main body, the terminal docking closed module comprises a back plate, a closed shell, a partition and a flip sealing plate, the closed shell, the partition and the flip sealing plate are all positioned on the outside of the corresponding joint terminal through the back plate, the partition separates the inner space of the closed shell to form a first cavity and a second cavity, a drying box is arranged on the closed shell, the terminal docking closed module constrains the joint terminal in the planned closed space from the outside, the drying box filters and guides air to enter the closed space along a specified route, and the inner side of the closed shell is provided with two respectively positioned An environmental monitoring head is arranged inside the first cavity and the second cavity; a connecting rod docking module is arranged outside the enclosed shell, the connecting rod docking module includes a sealing shell and an extension sleeve, the sealing shell is positioned outside the enclosed shell by the extension sleeve, the extension sleeve stretches and deforms to allow the sealing shell to move outside the connecting rod near the joint terminal, and the sealing shell is tightly positioned outside the connecting rod, so that air passes through the space where the joint terminal is located along a specified route and enters the enclosed space where the connecting rod is located; an exhaust module corresponding to the terminal docking closed module is arranged outside the base, the exhaust module includes a driving member and an exhaust pipe, and the exhaust pipe guides the air to move out from the corresponding sealing shell and the back plate along the specified route through the activated driving member.

[0006] Furthermore, the back plate is fixedly connected to the surface of the dry-type transformer body, the sealed shell is fixedly connected to the outer wall of the back plate, the partition is fixedly connected to the inner wall of the sealed shell, and the flip sealing plate is rotatably connected to the outer wall of the sealed shell, so that the terminal docking closure module can stably cover the joint terminal from the outside of the joint terminal, and the free end of the flip sealing plate is screwed and fixed to the outer wall of the sealed shell, which is conducive to adjusting the position of the flip sealing plate on the outer wall of the sealed shell and fixing it, so that the flip sealing plate can close the corresponding end of the sealed shell, and can also be flipped outward to expose the inner space of the sealed shell.

[0007] Furthermore, both sides of the base are fixedly connected with extension seats, a positioning frame is provided above the extension seat, a fixing seat is fixedly connected to the bottom of the positioning frame, the fixing seat is fixedly connected to the top of the extension seat, the positioning frame is screwed and fixed to the outer side wall of the closed shell, and the terminal docking closed module can be reinforced by the positioning frame to ensure the long-term stable use of the terminal docking closed module. The extension seat has a plurality of through holes, and the through holes are used to connect the hanging parts to effectively carry out the lifting and installation operation of the dry-type transformer body through the two extension seats.

[0008] Furthermore, since the drying box is positioned on the closed shell and plugged and fixed inside the closed shell, the drying box can be flexibly disassembled and reinstalled on the closed shell. A mesh plate is fixedly connected to the inside of the closed shell, and the mesh plate is located on the outside of the air inlet end of the drying box. The mesh plate can block large particles in the outside air to prevent large particles from entering the terminal docking closed module. The drying box filters the incoming air to reduce moisture entering the first cavity and the second cavity, so as to effectively control the contact between moisture and the terminal part of the joint.

[0009] Furthermore, one end of the stretch sleeve is fixedly connected to the front end of the shell, and the other end of the stretch sleeve is fixedly connected to the inside of the corresponding sealed shell. The shell and the sealed shell are stably connected by the stretch sleeve, and the shell is effectively positioned on the outside of the sealed shell so as to dock with the connecting rod at the corresponding position through the shell.

[0010] Furthermore, the partition plate, the mesh plate, the drying box and the sealing shell are all provided with docking grooves, and the connecting rod is clamped inside the docking grooves, so that the terminal docking closure module, the drying box and the connecting rod docking module can be effectively fastened to the outside of the connecting rod, so that the part of the connecting rod close to the joint terminal and the joint terminal are always in the planned accommodation space, so as to ensure the protection and status monitoring of the joint terminal.

[0011] Furthermore, since the two environmental monitoring heads are respectively positioned inside the first cavity and the second cavity, a combination rod is fixedly connected between the two environmental monitoring heads, and the two environmental monitoring heads are stably combined by the combination rod, the combination rod is fixedly connected inside the partition, and the combination rod is stably fixed in the inner space of the enclosed shell, the first cavity and the second cavity are formed by the inner space of the enclosed shell divided by the partition, and the two environmental monitoring heads are located at both ends of the combination rod, so that the two environmental monitoring heads are effectively fixed at designated areas within the first cavity and the second cavity, so as to effectively monitor the air state and humidity of the area where the joint terminal is located and the area where the connecting rod is close to the joint terminal.

[0012] Furthermore, since the exhaust module is positioned on the outside of the base at a position corresponding to the terminal docking closed module, the driving member is fixedly connected to the top of the extension seat, and the exhaust pipe is fixedly connected to the output end of the driving member, the exhaust module is stably connected to the position corresponding to the terminal docking closed module, and the outer wall of the exhaust pipe is fixedly connected to one end of two branch pipes, and the other ends of the two branch pipes are respectively inserted and fixed in the corresponding flip sealing plate and the inside of the shell, and the exhaust pipe is connected to the corresponding flip sealing plate and the shell through the two branch pipes, so that the air guiding operation can be effectively performed through the branch pipes, so that the air always flows along the designated route.

[0013] Furthermore, since the connecting rod docking module moves on the outside of the corresponding sealed shell, the position of the shell on the outside of the connecting rod is changed by the stretching deformation of the stretching sleeve, so that the shell is effectively clamped and fixed to the connecting rod near the joint terminal from the outside, a fastening frame is provided on the outside of the shell, and the outer wall of the shell and the outer wall of the closed shell adjacent to it are fixedly connected with fastening rings, and the two ends of the fastening frame are respectively fixed inside the two fastening rings, and the corresponding shell and the closed shell are effectively connected and combined by the fastening frame. The shell changes its position on the outside of the connecting rod through the stretching deformation of the stretching sleeve. After the shell is clamped and fixed to the connecting rod near the joint terminal from the outside, the fixing operation of the shell after the position adjustment is effectively completed by fastening and fixing the fastening frame on the shell and the corresponding closed shell, so as to effectively adapt to the connecting rods in different positions and states with different joint terminals.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention provides a terminal docking closed module connected at a fixed point to the joint terminal position on the dry-type transformer body, shields and constrains the joint terminal from the outside, and plans and isolates the area where the joint terminal on the dry-type transformer body is located, so that the joint terminal is in a planned closed space. The closed end of the terminal docking closed module can be connected to the lead rod docking module. The sealing shell is fastened to the outside of the lead rod of the combined joint terminal, and completely shields and protects the docking part of the lead rod and the joint terminal from the outside. Through the operation of the exhaust module, air can enter from the only air inlet on the closed shell, and move along a designated route in the closed space after being filtered by the drying box, so that the entered air does not stay in the space, and the air always maintains a fixed flow direction, effectively controlling the entry of moisture and the contact time of the joint terminal part. Two environmental monitoring heads fixed at designated areas in the first cavity and the second cavity effectively monitor the air state and humidity of the area where the joint terminal is located and the area where the lead rod is close to the joint terminal, so that the operator can timely understand the state of the joint terminal part, improve the sealing protection effect of the joint terminal part on the dry-type transformer body, and improve the safety of the dry-type transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution in the embodiment, the drawings in the embodiment are briefly introduced below.

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 for Figure 1 Schematic diagram of the structure from another perspective.

[0019] Figure 3 It is a front view structural schematic diagram of the present invention.

[0020] Figure 4 It is a schematic cross-sectional structure diagram of the present invention.

[0021] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of part A in the middle.

[0022] Figure 6 It is a schematic diagram of the partially separated structure of the present invention.

[0023] In the figure: 1. Dry-type transformer body; 11. Base; 12. Extension seat; 2. Terminal docking closed module; 21. Back plate; 22. Sealed shell; 23. Partition; 24. Flip sealing plate; 25. Environmental monitoring head; 251. Combination rod; 26. Mesh plate; 201. First cavity; 202. Second cavity; 3. Drying box; 4. Lead rod docking module; 41. Shell; 42. Extension sleeve; 5. Exhaust module; 51. Drive member; 52. Exhaust pipe; 53. Branch pipe; 6. Positioning frame; 61. Fixed seat; 7. Docking groove; 8. Fastening frame; 81. Fastening ring. DETAILED DESCRIPTION

[0024] The following is a clear and complete description of the technical solution in the embodiment of the present invention in conjunction with the accompanying drawings in the embodiment of the present invention. Figures 1 to 6 The detailed description of the structure will clearly show that the structural contents mentioned in the following embodiments are all based on the drawings in the specification.

[0025] See also Figure 1 to Figure 6 In an embodiment of the present invention, a dry-type transformer for photovoltaic power generation inverter includes a dry-type transformer body 1, a base 11 is fixedly connected to the bottom of the dry-type transformer body 1, a terminal docking closed module 2 corresponding to the joint terminal is arranged on the outside of the dry-type transformer body 1, and the terminal docking closed module 2 includes a back plate 21, a sealed shell 22, a partition 23 and a flip sealing plate 24, the sealed shell 22, the partition 23 and the flip sealing plate 24 are all positioned on the outside of the corresponding joint terminal through the back plate 21, the partition 23 separates the inner space of the sealed shell 22 to form a first cavity 201 and a second cavity 202, the sealed shell 22 is provided with a drying box 3, the terminal docking closed module 2 constrains the joint terminal in the planned closed space from the outside, and the sealed shell 22 is provided with a Two environmental monitoring heads 25 are respectively located inside the first cavity 201 and the second cavity 202. A connecting rod docking module 4 is provided outside the sealed shell 22. The connecting rod docking module 4 includes a shell 41 and an extension sleeve 42. The shell 41 is positioned outside the sealed shell 22 by the extension sleeve 42. The extension sleeve 42 is extended and deformed to allow the shell 41 to be tightly fixed on the outside of the connecting rod, allowing air to pass through the space where the joint terminal is located along a designated route into the closed space where the connecting rod is located. An exhaust module 5 corresponding to the terminal docking closed module 2 is provided on the outside of the base 11. The exhaust module 5 includes a driving member 51 and an exhaust pipe 52. The exhaust pipe 52 guides the air from the corresponding shell 41 and the back plate 21 along the designated route through the activated driving member 51.

[0026] A base 11 is provided below the dry-type transformer body 1, and the base 11 is fixedly connected to the bottom of the dry-type transformer body 1, playing the role of supporting the dry-type transformer body 1. A terminal docking closed module 2 corresponding to the joint terminal is provided on the outside of the dry-type transformer body 1, and the terminal docking closed module 2 is composed of a back plate 21, a sealed shell 22, a partition 23 and a flip sealing plate 24. The back plate 21 is fixedly connected to the surface of the dry-type transformer body 1, the sealed shell 22 is fixedly connected to the outer wall of the back plate 21, the partition 23 is fixedly connected to the inner wall of the sealed shell 22, and the flip sealing plate 24 is rotatably connected to the outer wall of the sealed shell 22. The back plate 21, the sealed shell 22, the partition 23 and the flip sealing plate 24 are stably combined, so that the sealed shell 22, the partition 23 and the flip sealing plate 24 are all positioned on the outside of the corresponding joint terminal through the back plate 21, so that the terminal docking closed module 2 stably shields the joint terminal from the outside of the joint terminal. The free end of the flip seal plate 24 is screwed and fixed to the outer wall of the sealed shell 22, which is conducive to adjusting the position of the flip seal plate 24 on the outer wall of the sealed shell 22 and fixing it, so that the flip seal plate 24 can close the corresponding end of the sealed shell 22, and can also be flipped outward to expose the inner space of the sealed shell 22. The partition 23 separates the inner space of the sealed shell 22 to form a first cavity 201 and a second cavity 202, so that the joint terminal and the part of the connecting rod close to the joint terminal are respectively shielded and protected in the second cavity 202 and the first cavity 201, and the joint terminal and the part of the connecting rod close to the joint terminal can be effectively shielded and protected. Both sides of the base 11 are fixedly connected to the extension seat 12, and a positioning frame 6 is arranged above the extension seat 12. The bottom of the positioning frame 6 is fixedly connected to a fixed seat 61, and the fixed seat 61 is fixedly connected to the top of the extension seat 12, and the positioning frame 6 is stably connected to the side of the dry-type transformer body 1. The positioning frame 6 is screwed and fixed to the outer wall of the sealed shell 22, and the terminal docking closed module 2 can be reinforced by the positioning frame 6 to ensure the long-term stable use of the terminal docking closed module 2. The extension seat 12 has a plurality of through holes, which are used to connect the hanging parts, so as to effectively carry out the lifting and installation operation of the dry-type transformer body 1 through the two extension seats 12.

[0027] The drying box 3 is positioned on the closed shell 22, and the drying box 3 is plugged and fixed inside the closed shell 22, so that the drying box 3 can be flexibly disassembled and reinstalled on the closed shell 22. A mesh plate 26 is fixedly connected inside the closed shell 22, and the mesh plate 26 is located outside the air inlet end of the drying box 3. The mesh plate 26 can block large particles in the outside air to prevent large particles from entering the terminal docking closed module 2. The terminal docking closed module 2 constrains the joint terminal in the planned closed space from the outside, and the drying box 3 filters the incoming air and guides the air to enter the closed space along the designated route, which can reduce the moisture from entering the first cavity 201 and the second cavity 202, so as to effectively control the contact between moisture and the terminal part of the joint. Two environmental monitoring heads 25 are arranged inside the closed shell 22, and the two environmental monitoring heads 25 are respectively positioned inside the first cavity 201 and the second cavity 202. A combination rod 251 is fixedly connected between the two environmental monitoring heads 25, and the two environmental monitoring heads 25 are stably combined by the combination rod 251. The combination rod 251 is fixedly connected to the inside of the partition 23, and the combination rod 251 is stably fixed in the inner space of the sealed shell 22. The first cavity 201 and the second cavity 202 are formed by the inner space of the sealed shell 22 separated by the partition 23. The two environmental monitoring heads 25 are located at both ends of the combination rod 251, so that the two environmental monitoring heads 25 are effectively fixed at the designated areas in the first cavity 201 and the second cavity 202, so as to effectively monitor the air state and humidity in the area where the joint terminal is located and the area where the connecting rod is close to the joint terminal.

[0028] The outside of the sealed shell 22 is provided with a connecting rod docking module 4, which is composed of a sealing shell 41 and a stretching sleeve 42. One end of the stretching sleeve 42 is fixedly connected to the front end of the sealing shell 41, and the other end of the stretching sleeve 42 is fixedly connected to the inside of the corresponding sealed shell 22. The sealing shell 41 and the sealed shell 22 are stably connected by the stretching sleeve 42, and the sealing shell 41 is effectively positioned on the outside of the sealed shell 22, so as to dock the connecting rod at the corresponding position through the sealing shell 41. The stretching sleeve 42 stretches and deforms to allow the sealing shell 41 to move outside the connecting rod near the joint terminal, and tightly positions the sealing shell 41 outside the connecting rod, and guides and plans the route of the air flowing in the closed space again, so that the air passes through the space where the joint terminal is located along the specified route and enters the closed space where the connecting rod is located. The connecting rod docking module 4 moves on the outside of the corresponding sealed shell 22, and changes the position of the capsule 41 on the outside of the connecting rod by stretching the sleeve 42, so that the capsule 41 is effectively clamped and fixed on the connecting rod near the joint terminal from the outside. A fastening frame 8 is provided on the outside of the capsule 41, and the outer wall of the capsule 41 and the outer wall of the adjacent sealed shell 22 are fixedly connected with fastening rings 81. The two ends of the fastening frame 8 are respectively fixed inside the two fastening rings 81, and the corresponding capsule 41 and the sealed shell 22 are effectively connected and combined by the fastening frame 8. The capsule 41 changes its position on the outside of the connecting rod by stretching the sleeve 42. After the capsule 41 is clamped and fixed on the connecting rod near the joint terminal from the outside, the fixing operation of the capsule 41 after adjusting the position is effectively completed by fastening the fastening frame 8 on the capsule 41 and the corresponding sealed shell 22, so as to effectively adapt to the connecting rods in different positions and states connected to different joint terminals.

[0029] The outer side of the base 11 is provided with an exhaust module 5 corresponding to the terminal docking closed module 2. The exhaust module 5 is composed of a driving member 51 and an exhaust pipe 52. The driving member 51 is fixedly connected to the top of the extension seat 12, and the exhaust pipe 52 is fixedly connected to the output end of the driving member 51, so that the exhaust module 5 is stably connected to the position of the corresponding terminal docking closed module 2. The outer wall of the exhaust pipe 52 is fixedly connected to one end of two branch pipes 53, and the other ends of the two branch pipes 53 are respectively plugged and fixed in the corresponding flip sealing plate 24 and the inside of the shell 41. The exhaust pipe 52 is connected with the corresponding flip sealing plate 24 and the shell 41 through the two branch pipes 53, so that the air is effectively guided through the exhaust pipe 52, so that the air always flows along the specified route, so that the exhaust pipe 52 guides the air from the corresponding shell 41 and the back plate 21 along the specified route.

[0030] The terminal docking closed module 2 is fixedly connected to the position of the joint terminal on the dry-type transformer body 1, and can block and constrain the joint terminal from the outside, playing the role of planning and isolating the area where the joint terminal is located on the dry-type transformer body 1, so that the joint terminal is in a planned closed space. The closed end of the terminal docking closed module 2 can connect the connecting rod docking module 4 according to its own position and the state of the connected connecting rod, and the stretching sleeve 42 stretches and deforms to adjust the position of the shell 41, so that the shell 41 is tightly fixed on the outside of the connecting rod of the combined joint terminal, and at the same time, the connecting rod and the joint terminal are completely shielded from the outside. Through the operation of the exhaust module 5, air can enter from the only air inlet on the closed shell 22, and move along the specified route in the closed space after being filtered by the drying box 3, so that the incoming air does not stay in the space, so that the air always maintains a fixed flow direction, effectively controlling the entry of moisture and the contact time of the joint terminal part. By fixing two environmental monitoring heads 25 in designated areas within the first cavity 201 and the second cavity 202, the air condition and humidity of the area where the joint terminal is located and the area where the connecting rod is close to the joint terminal are effectively monitored, so that the operator can understand the status of the joint terminal part in time, improve the sealing protection effect of the joint terminal part on the dry-type transformer body 1, and improve the safety of the dry-type transformer.

[0031] The partition plate 23, the mesh plate 26, the drying box 3 and the sealing shell 41 are all provided with docking grooves 7, and the connecting rod is clamped inside the docking grooves 7, so that the terminal docking closed module 2, the drying box 3 and the connecting rod docking module 4 can be effectively fastened to the outside of the connecting rod, so that the part of the connecting rod close to the joint terminal and the joint terminal are always in the planned accommodation space, so as to ensure the protection and status monitoring of the joint terminal.

[0032] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A dry-type transformer for photovoltaic power generation inverter, comprising a dry-type transformer body (1), wherein a base (11) is fixedly connected to the bottom of the dry-type transformer body (1), characterized in that: A terminal docking closed module (2) corresponding to the joint terminal is provided on the outside of the dry-type transformer body (1), the terminal docking closed module (2) comprising a back plate (21), a sealed shell (22), a partition (23) and a flip sealing plate (24), the sealed shell (22), the partition (23) and the flip sealing plate (24) are all positioned on the outside of the corresponding joint terminal through the back plate (21), the partition (23) and the flip sealing plate (24) separate the inner space of the sealed shell (22) to form a first cavity (201) and a second cavity (202), the sealed shell (22) is provided with a drying box (3), the terminal docking closed module (2) constrains the joint terminal in the planned closed space from the outside, and two environmental monitoring heads (25) are provided on the inside of the sealed shell (22), which are respectively located inside the first cavity (201) and the second cavity (202); A connecting rod docking module (4) is provided outside the sealed shell (22), the connecting rod docking module (4) comprising a sealing shell (41) and a stretching sleeve (42), the sealing shell (41) being positioned outside the sealed shell (22) through the stretching sleeve (42), the stretching sleeve (42) stretching and deforming to allow the sealing shell (41) to be tightly positioned outside the connecting rod, allowing air to pass through the space where the joint terminal is located along a specified route and enter the sealed space where the connecting rod is located; An air extraction module (5) corresponding to the terminal docking closed module (2) is arranged on the outside of the base (11), the air extraction module (5) comprising a driving member (51) and an air extraction pipe (52), the air extraction pipe (52) guiding air to move out from the corresponding enclosure (41) and the back plate (21) along a designated route by activating the driving member (51); The back plate (21) is fixedly connected to the surface of the dry-type transformer body (1), the sealed shell (22) is fixedly connected to the outer wall of the back plate (21), the partition plate (23) is fixedly connected to the inner wall of the sealed shell (22), the flip sealing plate (24) is rotatably connected to the outer wall of the sealed shell (22), and the free end of the flip sealing plate (24) is screwed and fixed to the outer wall of the sealed shell (22); Both sides of the base (11) are fixedly connected to an extension seat (12); a positioning frame (6) is provided above the extension seat (12); a fixing seat (61) is fixedly connected to the bottom of the positioning frame (6); the fixing seat (61) is fixedly connected to the top of the extension seat (12); the positioning frame (6) is screwed and fixed to the outer wall of the closed shell (22); the drying box (3) is plugged and fixed inside the closed shell (22); a mesh plate (26) is fixedly connected inside the closed shell (22); the mesh plate (26) is located outside the air inlet end of the drying box (3); one end of the extension sleeve (42) is fixedly connected to the front end of the sleeve (41); the other end of the extension sleeve (42) is fixedly connected to the corresponding inside of the closed shell (22).

2. A dry-type transformer for photovoltaic power generation inverter according to claim 1, characterized in that: The partition plate (23), the screen plate (26), the drying box (3) and the sealing shell (41) are all provided with a docking groove (7), and the guide rod is clamped inside the docking groove (7).

3. A dry-type transformer for photovoltaic power generation inverter according to claim 1, characterized in that: A combination rod (251) is fixedly connected between the two environment monitoring heads (25), and the combination rod (251) is fixedly connected inside the partition plate (23).

4. A dry-type transformer for photovoltaic power generation inverter according to claim 1, characterized in that: The driving member (51) is fixedly connected to the top of the extension seat (12), the exhaust pipe (52) is fixedly connected to the output end of the driving member (51), the outer wall of the exhaust pipe (52) is fixedly connected to one end of two branch pipes (53), and the other ends of the two branch pipes (53) are respectively plugged and fixed to the corresponding flip sealing plate (24) and the inside of the sealing shell (41).

5. A dry-type transformer for photovoltaic power generation inverter according to claim 1, characterized in that: A fastening frame (8) is provided on the outside of the sealing shell (41), and the outer wall of the sealing shell (41) and the outer wall of the adjacent closed shell (22) are both fixedly connected with fastening rings (81), and the two ends of the fastening frame (8) are respectively fixed inside the two fastening rings (81).

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