A fully-enclosed fan motor double-circulation heat dissipation structure for dry-type transformer cooling

Abstract

The application discloses a kind of dry-type transformer cooling with full-closed fan motor double-cycle heat dissipation structure, it is related to dry-type transformer cooling technical field, including seal cover and the transformer main body being arranged in seal cover inside, the outside of the transformer main body is provided with connecting barrel, the upper side of the connecting barrel is provided with a plurality of cooling air duct, the outside of the transformer main body is fixedly connected with a plurality of fan one, the upper side of the seal cover is provided with top plate, and the top plate is provided with circulation unit. By being provided with seal cover, inner cooling pipe, outer cooling pipe, fan one and fan two, it is convenient to seal the transformer at the same time, and the transformer is cooled, when the external environment temperature is high, the air current inhaled by fan two is hot air current, makes air bag inflation, sealing plate one is lowered sealing plate two is raised, makes air inlet passage and branch passage connection, at this time, hot air current is cooled by the cold water in water tank, so that the air current blown is cold air current, avoid affecting the cold water circulation of outer cooling pipe.

Description

Technical Field

[0001] This invention relates to the field of dry-type transformer cooling technology, specifically to a fully enclosed fan motor dual-circulation heat dissipation structure for cooling dry-type transformers. Background Technology

[0002] A dry-type transformer is a transformer whose core and windings are not immersed in insulating oil. It is an electrical device that does not use a liquid insulating medium; its core characteristic is the use of solid insulating materials such as air or resin.

[0003] Dry-type transformers are widely used in environments with high protection requirements. They typically employ a fully sealed casing to enclose the core and windings, isolating them from external dust, moisture, and salt spray to ensure insulation performance. To meet heat dissipation needs under sealed conditions, existing technology has introduced a dual-circulation cooling structure with a fan and motor. In this structure, internal circulating air absorbs heat from the transformer and transfers it to the external circulation via a heat exchanger, where it is then cooled by forced airflow from an external fan. However, when the external ambient temperature is high (such as in summer or in heat island areas), the external fan directly draws in hot air with low density, resulting in a significant reduction in its heat dissipation capacity and consequently a substantial decrease in the heat dissipation efficiency of the dual-circulation system.

[0004] Therefore, this invention proposes a fully enclosed dual-circulation heat dissipation structure for cooling dry-type transformers using a fan motor, in order to solve the aforementioned problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a fully enclosed dual-circulation cooling structure for dry-type transformers using a fan motor, which solves the problem of reduced heat dissipation efficiency of transformers when the external ambient temperature is high.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A fully enclosed dual-circulation cooling structure for a dry-type transformer includes a sealed cover and a transformer body disposed inside the sealed cover. A connecting cylinder is provided on the outer side of the transformer body, and multiple cooling air ducts are opened on the upper side of the connecting cylinder. Multiple fans are fixedly connected to the outer side of the transformer body. A top plate is provided on the upper side of the sealed cover, and a circulation unit is provided on the top plate. The circulation unit includes an inner cooling pipe, which is fixedly connected to the lower side of the top plate. A mounting frame and a water tank are fixedly connected to the upper side of the top plate. A heat dissipation fin is fixedly connected to the inner side of the mounting frame, and an outer cooling pipe is fixedly connected to the lower side of the heat dissipation fin. An air inlet unit is provided on the outer side of the mounting frame.

[0007] Preferably, a circulation pipe is fixedly connected between the outer cooling pipe and the inner cooling pipe, a water pump is fixedly connected to the outside of the water tank, an inlet pipe is fixedly connected between the water pump and the inner cooling pipe, an outlet pipe is fixedly connected to the outside of the outer cooling pipe, a rectangular opening is provided on the upper side of the mounting frame, an air inlet channel is fixedly connected to the front side of the mounting frame, a mounting plate is fixedly connected to the front side of the air inlet channel, and a second fan is fixedly connected to the front side of the mounting plate.

[0008] Preferably, a top cover is fixedly connected to the upper side of the air inlet channel, and a front cover is fixedly connected to the outer side of the air inlet channel. A main air inlet is opened on the front side of the front cover, and side air inlets are opened on both the left and right sides of the front cover.

[0009] Preferably, the left end of the water outlet pipe extends to the inside of the water tank, the air inlet channel is connected to the mounting frame, the air inlet unit includes a branch channel, the branch channel is fixedly connected to the right side of the air inlet channel, the right end of the branch channel is located inside the water tank, a connecting channel is fixedly connected between the branch channel and the mounting frame, a sealing plate one is provided on the outside of the air inlet channel, a sealing plate two is provided on the outside of the branch channel, a rectangular hole is opened on the right side of the top cover, and a side cover is fixedly connected between the top cover and the water tank.

[0010] Preferably, the sealing plate one is slidably connected to the air inlet channel, a lifting plate is fixedly connected to the front side of the sealing plate one, an installation groove is opened on the front side of the lifting plate, an inclined plate is rotatably connected to the inner side of the installation groove, a rotating block is rotatably connected to the outer side of the inclined plate, a control block is fixedly connected to the front side of the rotating block, a fixed box and a guide rail are fixedly connected to the upper side of the air inlet channel, an airbag is fixedly connected to the inner side of the fixed box, a push plate is fixedly connected to the outer side of the airbag, a guide block is slidably connected to the inner side of the guide rail, the guide block is fixedly connected to the control block, a connecting plate is fixedly connected between the guide block and the push plate, and an installation pipe one and an installation pipe two are fixedly connected between the fixed box and the air inlet channel.

[0011] Preferably, the second sealing plate is slidably connected to the branch channel, a lifting block is fixedly connected to the upper side of the second sealing plate, a screw is rotatably connected to the upper side of the branch channel, a gear is fixedly connected to the upper end of the screw, an L-shaped plate is fixedly connected to the upper side of the control block, a toothed plate that meshes with the gear is fixedly connected to the outer side of the L-shaped plate, and the screw is threadedly connected to the lifting block.

[0012] Preferably, two L-shaped channels are fixedly connected to the upper side of the air inlet channel, a fan is fixedly connected to the outer side of the L-shaped channel, a sealing plate is provided on the inner side of the L-shaped channel, a linkage plate is rotatably connected to the upper side of the sealing plate on both sides, a connecting block is rotatably connected to the outer side of the linkage plate, a front block is fixedly connected to the front side of the connecting block, and a front plate is fixedly connected to the front side of the guide block.

[0013] Preferably, the front plate is slidably connected to the top cover, a fixing block is fixedly connected to the upper side of the second fan, a telescopic rod and a spring are fixedly connected between the fixing block and the front block, a control switch is fixedly connected to the rear side of the front block, and the third sealing plate is slidably connected to the L-shaped channel.

[0014] This invention provides a fully enclosed dual-circulation heat dissipation structure for cooling dry-type transformers using a fan motor. Compared with existing technologies, it has the following advantages: (1) The cooling and heat dissipation structure of the dry-type transformer is equipped with a sealing cover, an inner cooling pipe, an outer cooling pipe, a fan 1 and a fan 2, which facilitates the full sealing of the transformer while dissipating heat. When the external ambient temperature is high, the airflow drawn in by the fan 2 is hot airflow, which causes the airbag to expand. The sealing plate 1 descends and the sealing plate 2 rises, connecting the air inlet channel and the branch channel. At this time, the hot airflow is cooled by the cold water in the water tank, so that the blown airflow is cold airflow, avoiding affecting the cold water circulation of the outer cooling pipe.

[0015] (2) The cooling and heat dissipation structure of the dry-type transformer is equipped with an air inlet channel and a front plate. When the external annular temperature is high, the front plate pushes the front block to move, so that the sealing plates on both sides are close to each other and the fans on both sides are opened, reducing the ventilation load of the fans and avoiding affecting the heat dissipation of the transformer. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention; Figure 3 This is a three-dimensional structural diagram of the top plate in this invention; Figure 4 This is a partial cross-sectional perspective view of the present invention; Figure 5 This is a three-dimensional structural diagram of the top plate from another perspective in this invention; Figure 6 This is a three-dimensional cross-sectional view of the air inlet channel in this invention; Figure 7 This is a three-dimensional structural diagram of the air inlet channel in this invention; Figure 8 for Figure 7 Enlarged view of point A in the middle; Figure 9 This is a cross-sectional perspective view of the branch channel in this invention; Figure 10 for Figure 9 Enlarged view of point B in the middle; Figure 11 This is a cross-sectional perspective view of the L-shaped channel in this invention; Figure 12 for Figure 11 Enlarged view of point C in the middle.

[0017] In the diagram: 1. Sealing cover; 2. Top plate; 3. Circulation unit; 4. Air inlet unit; 5. Transformer body; 6. Connecting cylinder; 7. Cooling air duct; 8. Fan 1; 31. Inner cooling pipe; 32. Water inlet pipe; 33. Water tank; 34. Mounting frame; 35. Outer cooling pipe; 36. Heat dissipation fins; 37. Rectangular opening; 38. Circulation pipe; 39. Water pump; 310. Water outlet pipe; 311. Air inlet channel; 312. Top cover; 313. Front cover; 314. Main air inlet; 315. Side air inlet; 316. Mounting plate; 317. Fan 2; 41. Branch channel; 42. Connecting channel; 44. Rectangular hole; 46. Sealing plate 1; 48. Side cover; 49. Lifting mechanism 410. Plate; 411. Mounting slot; 412. Inclined plate; 413. Rotating block; 414. Control block; 415. Fixing box; 416. Airbag; 417. Mounting tube one; 418. Mounting tube two; 419. Push plate; 420. Connecting plate; 421. Guide rail; 422. Guide block; 423. Sealing plate two; 424. Lifting block; 425. Screw; 426. Gear; 427. Tooth plate; 428. L-shaped plate; 429. Front plate; 430. L-shaped channel; 431. Fan three; 432. Sealing plate three; 433. Linkage plate; 434. Connecting block; 435. Fixing block; 436. Telescopic rod; 437. Spring; 439. Control switch. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] This invention provides the following technical solutions: Example 1 Please see Figure 1 - Figure 10A fully enclosed dual-circulation cooling structure for a dry-type transformer includes a sealed cover 1 and a transformer body 5 housed inside the sealed cover 1. A connecting cylinder 6 is provided on the outer side of the transformer body 5, and multiple cooling air ducts 7 are opened on the upper side of the connecting cylinder 6. Multiple fans 8 are fixedly connected to the outer side of the transformer body 5. A top plate 2 is provided on the upper side of the sealed cover 1, and a circulation unit 3 is provided on the top plate 2. The circulation unit 3 includes an inner cooling pipe 31, which is fixedly connected to the lower side of the top plate 2. A mounting frame 34 and a water tank 33 are fixedly connected to the upper side of the top plate 2. A heat dissipation fin 36 is fixedly connected to the inner side of the mounting frame 34, and the lower side of the heat dissipation fin 36... An external cooling pipe 35 is fixedly connected to the mounting frame 34. An air inlet unit 4 is provided on the outside of the mounting frame 34. A circulation pipe 38 is fixedly connected between the external cooling pipe 35 and the internal cooling pipe 31. A water pump 39 is fixedly connected to the outside of the water tank 33. A water inlet pipe 32 is fixedly connected between the water pump 39 and the internal cooling pipe 31. A water outlet pipe 310 is fixedly connected to the outside of the external cooling pipe 35. A rectangular opening 37 is provided on the upper side of the mounting frame 34. An air inlet channel 311 is fixedly connected to the front side of the mounting frame 34. A mounting plate 316 is fixedly connected to the front side of the air inlet channel 311. A fan 317 is fixedly connected to the front side of the mounting plate 316. A top cover 3 is fixedly connected to the upper side of the air inlet channel 311. 12. A front cover 313 is fixedly connected to the outside of the air inlet channel 311. A main air inlet 314 is opened on the front side of the front cover 313, and side air inlets 315 are opened on both the left and right sides of the front cover 313. The left end of the water outlet pipe 310 extends to the inside of the water tank 33. The air inlet channel 311 is connected to the mounting frame 34. Through the sealing cover 1 and the top plate 2, the transformer body 5 is protected. When the transformer body 5 is running, multiple fans 8 are started. The fans 8 blow away the heat on the surface of the transformer body 5 through multiple cooling air ducts 7. The hot air rises to the inner cooling pipe 31 at the top. At the same time, the water pump 39 is started. The water pump 39 pumps water through the water inlet pipe 32. Cold water in water tank 33 is drawn into inner cooling pipe 31 to facilitate cooling of hot airflow and achieve cooling of transformer body 5. The heated water flows through circulation pipe 38 into outer cooling pipe 35, which guides heat to heat dissipation fins 36. At this time, fan 317 is started, and under the action of air inlet channel 311, external airflow blows out the heat from heat dissipation fins 36. At this time, the water in outer cooling pipe 35 becomes cold water and flows back to water tank 33 through outlet pipe 310 to achieve cold water circulation. The airflow in the sealing cover 1 is cooled and then circulated back into the sealing cover 1 for use, achieving the dual-circulation cooling effect of dry-type transformer.

[0020] The air intake unit 4 includes a branch channel 41, which is fixedly connected to the right side of the air intake channel 311. The right end of the branch channel 41 is located inside the water tank 33. A connecting channel 42 is fixedly connected between the branch channel 41 and the mounting frame 34. A sealing plate 46 is provided on the outside of the air intake channel 311, and a sealing plate 422 is provided on the outside of the branch channel 41. A rectangular hole 44 is opened on the right side of the top cover 312. A side cover 48 is fixedly connected between the top cover 312 and the water tank 33. The sealing plate 46 is slidably connected to the air intake channel 311. A lifting plate 49 is fixedly connected to the front side of the sealing plate 46. An installation groove 410 is opened on the front side of the lifting plate 49. An inclined plate 411 is rotatably connected to the inside of the installation groove 410, and a rotating block 4 is rotatably connected to the outside of the inclined plate 411. 12. A control block 413 is fixedly connected to the front side of the rotating block 412. A fixed box 414 and a guide rail 420 are fixedly connected to the upper side of the air inlet channel 311. An airbag 415 is fixedly connected to the inner side of the fixed box 414. A push plate 418 is fixedly connected to the outer side of the airbag 415. A guide block 421 is slidably connected to the inner side of the guide rail 420. The guide block 421 is fixedly connected to the control block 413. A connecting plate 419 is fixedly connected between the guide block 421 and the push plate 418. An installation pipe 1 416 and an installation pipe 2 417 are fixedly connected between the fixed box 414 and the air inlet channel 311. A sealing plate 2 422 is slidably connected to the branch channel 41. A lifting block 423 is fixedly connected to the upper side of the sealing plate 2 422. A screw 424 is rotatably connected to the upper side of the branch channel 41. A gear 425 is fixedly connected to the upper end of 424, and an L-shaped plate 427 is fixedly connected to the upper side of the control block 413. A toothed plate 426 that meshes with the gear 425 is fixedly connected to the outer side of the L-shaped plate 427. The screw 424 is threadedly connected to the lifting block 423. One-way valves are provided on the outer sides of both the first mounting pipe 416 and the second mounting pipe 417. When the temperature of the external environment is high (greater than 40°C), the second fan 317 draws the external airflow into the air inlet channel 311. The external airflow enters the inner side of the fixed box 414 through the first mounting pipe 416, and then flows back into the air inlet channel 311 through the second mounting pipe 417. During this process, due to the high temperature of the airflow, the nitrogen filled in the airbag 415 expands due to heat, and the airbag 415 expands... The push plate 418 moves forward, which in turn moves the connecting plate 419 forward. The connecting plate 419 then moves the control block 413 forward, which in turn moves the inclined plate 411 to rotate. The inclined plate 411 then moves the lifting plate 49 downward, which in turn moves the sealing plate 46 downward. As the temperature rises, the sealing plate 46 completely blocks the air inlet channel 311. Simultaneously, the control block 413 moves the L-shaped plate 427, which in turn moves the toothed plate 426. The toothed plate 426 then rotates the gear 425, which in turn rotates the screw 424. The screw 424 then moves the lifting block 423 upward, which in turn moves the sealing plate 422 upward, connecting the branch channel 41 with the air inlet channel 311. Since the air inlet channel 311 is blocked by the sealing plate 46...The external hot airflow is guided into the branch channel 41 and then into the mounting frame 34 via the connecting channel 42. Since parts of the branch channel 41 and connecting channel 42 are located inside the water tank 33, the cold water in the water tank 33 cools the hot airflow as it flows through them (the cold water temperature in the water tank 33 rises rapidly; if it rises too quickly, the operator should replace the cold water promptly; for extended periods of operation, continue replacing the cold water). This ensures that the airflow discharged into the mounting frame 34 is cold air, preventing the hot airflow from directly affecting the external cooling pipe 35 and thus improving heat exchange efficiency.

[0021] Example 2 Based on Example 1, such as Figure 11 , Figure 12 As shown, two L-shaped channels 429 are fixedly connected to the upper side of the air inlet channel 311. A fan 430 is fixedly connected to the outer side of the L-shaped channel 429. A sealing plate 431 is provided on the inner side of the L-shaped channel 429. A linkage plate 432 is rotatably connected to the upper side of both sealing plates 431. A connecting block 433 is rotatably connected to the outer side of the linkage plate 432. A front block 434 is fixedly connected to the front side of the connecting block 433. A front plate 428 is fixedly connected to the front side of the guide block 421. The front plate 428 is slidably connected to the top cover 312. A fixing block 435 is fixedly connected to the upper side of the fan 317. A telescopic rod 436 and a spring 437 are fixedly connected between the fixing block 435 and the front block 434. A control switch 439 is fixedly connected to the rear side of 34. The sealing plate 431 is slidably connected to the L-shaped channel 429. When the sealing plate 46 descends, the guide block 421 drives the front plate 428 to move forward. When the front plate 428 contacts the control switch 439, the control switch 439 is electrically connected to the two fans 430. At this time, the two fans 430 start, and the front block 434 moves forward. The front block 434 drives the linkage plate 432 to rotate, and the linkage plate 432 drives the sealing plate 431 to move. The sealing plates 431 on both sides move closer to each other, so that the L-shaped channel 429 is connected to the air inlet channel 311, which facilitates the two fans 430 to ventilate into the air inlet channel 311 at the same time, reducing the load on the second fan 317.

[0022] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0023] During operation, fan 8 is first started to cool the transformer body 5 and blow hot air into the surface of the inner cooling pipe 31. At this time, water pump 39 is started, and cold water is introduced into the inner cooling pipe 31 under the action of water inlet pipe 32 to facilitate the cooling of the hot air and facilitate the circulation of the air. The heated water is introduced into the outer cooling pipe 35 through circulation pipe 38, and fan 317 is started to facilitate the dissipation of heat from the outer cooling pipe 35, so that the water inside is cooled down. The cold water is returned to the water tank 33 through water outlet pipe 310 to facilitate the circulation of cold water.

[0024] When the external temperature is high, the external hot airflow is introduced into the fixed box 414 through the first installation pipe 416, and then reintroduced into the air inlet channel 311 through the second installation pipe 417, causing the airbag 415 to inflate. The airbag 415 drives the connecting plate 419 on the push plate 418 to move, and the connecting plate 419 drives the control block 413 to move. Under the action of the inclined plate 411 and the lifting plate 49, the sealing plate 46 descends, blocking the air inlet channel 311. At the same time, the control block 413 drives the toothed plate 426 on the L-shaped plate 427 to move, and the toothed plate 426 drives the screw 424 on the gear 425. Rotation causes the second sealing plate 422 to rise under the action of the lifting block 423, connecting the branch channel 41 with the air inlet channel 311. At this time, the external heat flow passes through the branch channel 41 and the connecting channel 42 into the mounting frame 34, allowing the cold water in the water tank 33 to cool the hot air flow, facilitating the cooling of the external cooling pipe 35. Simultaneously, the guide block 421 drives the front plate 428 to move forward. Under the action of the front block 434 and the linkage plate 432, the sealing plates 431 on both sides move closer to each other, connecting the L-shaped channel 429 with the air inlet channel 311. At the same time, the fan 430 starts, reducing the load on the second fan 317.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fully enclosed fan motor dual-circulation heat dissipation structure for cooling dry-type transformers, comprising a sealing cover (1) and a transformer body (5) disposed inside the sealing cover (1), characterized in that: A connecting cylinder (6) is provided on the outside of the transformer body (5). Multiple cooling air ducts (7) are opened on the upper side of the connecting cylinder (6). Multiple fans (8) are fixedly connected to the outside of the transformer body (5). A top plate (2) is provided on the upper side of the sealing cover (1). A circulation unit (3) is provided on the top plate (2). The circulation unit (3) includes an inner cooling pipe (31). The inner cooling pipe (31) is fixedly connected to the lower side of the top plate (2). An installation frame (34) and a water tank (33) are fixedly connected to the upper side of the top plate (2). A heat dissipation fin (36) is fixedly connected to the inner side of the installation frame (34). An outer cooling pipe (35) is fixedly connected to the lower side of the heat dissipation fin (36). An air inlet unit (4) is provided on the outside of the installation frame (34).

2. The fully enclosed dual-circulation heat dissipation structure for cooling a dry-type transformer fan motor according to claim 1, characterized in that: A circulation pipe (38) is fixedly connected between the external cooling pipe (35) and the internal cooling pipe (31). A water pump (39) is fixedly connected to the outside of the water tank (33). A water inlet pipe (32) is fixedly connected between the water pump (39) and the internal cooling pipe (31). A water outlet pipe (310) is fixedly connected to the outside of the external cooling pipe (35). A rectangular opening (37) is provided on the upper side of the mounting frame (34). An air inlet channel (311) is fixedly connected to the front side of the mounting frame (34). An mounting plate (316) is fixedly connected to the front side of the air inlet channel (311). A second fan (317) is fixedly connected to the front side of the mounting plate (316).

3. The fully enclosed dual-circulation heat dissipation structure for cooling a dry-type transformer fan motor according to claim 2, characterized in that: The upper side of the air inlet channel (311) is fixedly connected to a top cover (312), and the outer side of the air inlet channel (311) is fixedly connected to a front cover (313). The front cover (313) has a main air inlet (314) on its front side, and side air inlets (315) are opened on both the left and right sides of the front cover (313).

4. The fully enclosed dual-circulation heat dissipation structure for cooling a dry-type transformer motor according to claim 2, characterized in that: The left end of the water outlet pipe (310) extends to the inside of the water tank (33). The air inlet channel (311) is connected to the mounting frame (34). The air inlet unit (4) includes a branch channel (41). The branch channel (41) is fixedly connected to the right side of the air inlet channel (311). The right end of the branch channel (41) is located inside the water tank (33). A connecting channel (42) is fixedly connected between the branch channel (41) and the mounting frame (34). A sealing plate one (46) is provided on the outside of the air inlet channel (311). A sealing plate two (422) is provided on the outside of the branch channel (41). A rectangular hole (44) is opened on the right side of the top cover (312). A side cover (48) is fixedly connected between the top cover (312) and the water tank (33).

5. The fully enclosed dual-circulation heat dissipation structure for cooling a dry-type transformer motor according to claim 4, characterized in that: The sealing plate (46) is slidably connected to the air inlet channel (311). A lifting plate (49) is fixedly connected to the front side of the sealing plate (46). An installation groove (410) is provided on the front side of the lifting plate (49). An inclined plate (411) is rotatably connected to the inner side of the installation groove (410). A rotating block (412) is rotatably connected to the outer side of the inclined plate (411). A control block (413) is fixedly connected to the front side of the rotating block (412). A fixed box (414) and a guide rail (413) are fixedly connected to the upper side of the air inlet channel (311). 20) An airbag (415) is fixedly connected to the inner side of the fixed box (414), a push plate (418) is fixedly connected to the outer side of the airbag (415), a guide block (421) is slidably connected to the inner side of the guide rail (420), the guide block (421) is fixedly connected to the control block (413), a connecting plate (419) is fixedly connected between the guide block (421) and the push plate (418), and an installation pipe one (416) and an installation pipe two (417) are fixedly connected between the fixed box (414) and the air inlet channel (311).

6. The fully enclosed dual-circulation heat dissipation structure for cooling a dry-type transformer motor according to claim 5, characterized in that: The sealing plate 2 (422) is slidably connected to the branch channel (41). A lifting block (423) is fixedly connected to the upper side of the sealing plate 2 (422). A screw (424) is rotatably connected to the upper side of the branch channel (41). A gear (425) is fixedly connected to the upper end of the screw (424). An L-shaped plate (427) is fixedly connected to the upper side of the control block (413). A toothed plate (426) that meshes with the gear (425) is fixedly connected to the outer side of the L-shaped plate (427). The screw (424) is threadedly connected to the lifting block (423).

7. The fully enclosed dual-circulation heat dissipation structure for cooling a dry-type transformer motor according to claim 5, characterized in that: The upper side of the air inlet channel (311) is fixedly connected to two L-shaped channels (429). The outer side of the L-shaped channel (429) is fixedly connected to a fan (430). The inner side of the L-shaped channel (429) is provided with a sealing plate (431). The upper side of the sealing plate (431) on both sides is rotatably connected to a linkage plate (432). The outer side of the linkage plate (432) is rotatably connected to a connecting block (433). The front side of the connecting block (433) is fixedly connected to a front block (434). The front side of the guide block (421) is fixedly connected to a front plate (428).

8. The fully enclosed dual-circulation heat dissipation structure for cooling a dry-type transformer fan motor according to claim 7, characterized in that: The front plate (428) is slidably connected to the top cover (312), the upper side of the second fan (317) is fixedly connected to a fixing block (435), the fixing block (435) and the front block (434) are fixedly connected to a telescopic rod (436) and a spring (437), the rear side of the front block (434) is fixedly connected to a control switch (439), and the sealing plate (431) is slidably connected to the L-shaped channel (429).

Images