Dry-type transformer with active cooling function

Abstract

The invention belongs to the related technical field of transformers, and particularly discloses a dry-type transformer with an active cooling function, which comprises a base and a plurality of dry-type transformer main bodies mounted above the base, an upper frame rod is arranged at the upper ends of the plurality of dry-type transformer main bodies, and a sliding frame is arranged on one side of the outer part of the upper frame rod; the outer wall of the sliding frame is connected with a moving plate through an arranged telescopic mechanism, a storage box is arranged on the side, close to the dry-type transformer body, of the exterior of the moving plate, a cooling assembly is arranged in the storage box, a low-temperature storage tank is arranged at the upper end of the upper frame rod, and an emergency temperature control unit is arranged on the outer edge of the low-temperature storage tank. According to the dry-type transformer disclosed by the invention, flexible temperature control can be actively carried out according to heat generated by the dry-type transformer main bodies, so that the dry-type transformer is more energy-saving in a heat dissipation and cooling process.

Description

Technical Field

[0001] The present invention belongs to the technical field related to transformers, and specifically discloses a dry-type transformer with active cooling. Background Art

[0002] A dry-type transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. Its main components are a low-voltage coil, a high-voltage coil, and an iron core. Its main functions include: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization, etc. In a circuit system, the safe and stable operation of the transformer is crucial for the stable operation of the circuit system. In a dry-type transformer, cooling fans are usually used for cooling.

[0003] The traditional method is to install the cooling fans at the bottom of the dry-type transformer and cool from bottom to top to remove heat. The disadvantages are that it is easy to accumulate dust, and once the cooling fans are turned on, it will consume a large amount of energy, and the heat dissipation effect cannot be specifically guided. The cooling air flow is often difficult to fully cover and act on each key heat-generating part of the dry-type transformer, resulting in low cooling efficiency, heat accumulation in some areas, and affecting the stable operation and service life of the dry-type transformer. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the background art, and a dry-type transformer with active cooling is proposed, including a base and a plurality of dry-type transformer bodies installed above the base. An upper shelf rod is commonly provided at the upper ends of the plurality of dry-type transformer bodies. A sliding frame is provided on one side of the outer part of the upper shelf rod. A moving plate is connected to the outer wall of the sliding frame through a telescopic mechanism provided. A storage box is provided on the outer part of the moving plate and close to the dry-type transformer body. A cooling component is provided inside the storage box. A low-temperature storage tank is provided at the upper end of the upper shelf rod. An emergency temperature control unit is provided on the outer edge of the low-temperature storage tank. Temperature sensors are provided above each of the plurality of dry-type transformer bodies.

[0005] Preferably, the telescopic mechanism includes a cylinder fixedly provided on the outer wall of the sliding frame, and the telescopic end of the cylinder is connected to the outer side of the moving plate.

[0006] Preferably, the cooling component includes two U-shaped tubes respectively slidably installed on both sides of the front end of the storage box. The two U-shaped tubes on the same side are connected through a connecting pipe commonly provided at the lower end inside. A suction pump is connected to the lower part inside one of the U-shaped tubes through a hose. The suction pump is installed at the inner bottom of the storage box. A plurality of nozzles are installed on the outer part of the U-shaped tube. A cooling pipe is provided inside the storage box.

[0007] Preferably, the emergency temperature control unit includes a ring pipe provided on the outer edge of the low-temperature storage tank. Nozzles are equidistantly installed on the outer part of the ring pipe along the circumferential direction. The upper part inside the low-temperature storage tank is connected to the ring pipe through a gas injection device.

[0008] Preferably, sliders are commonly arranged above the outer sides of two U-shaped tubes on the same side, and the sliders slide above the interior of the storage box.

[0009] Preferably, a motor is arranged on one side above the storage box, a fixed block is arranged above one end of the storage box far away from the motor, a lead screw is fixedly arranged on the output shaft of the motor, one end of the lead screw is rotationally matched with the fixed block, and the two sliders are arranged in a reverse direction with respect to the threads on the outer surface of the lead screw.

[0010] Preferably, fixing rods are arranged at both ends of the bottom of the low-temperature storage tank, mounting abutting blocks are arranged on the outer surfaces of one sides of the fixing rods, locking and abutting assemblies are arranged at both the upper and lower ends of the outer parts of the mounting abutting blocks, grooves are formed on both sides inside the mounting abutting blocks, and clamping rods are movably clamped in the two grooves. Arc-shaped guide plates are arranged on the outer surfaces of the two clamping rods, multiple arc-shaped guide strips are arranged on the inner walls of the arc-shaped guide plates, and multiple irregular convex blocks are arranged between adjacent two arc-shaped guide strips on the inner walls of the arc-shaped guide plates.

[0011] Preferably, the locking and abutting assembly includes a fixing plate fixedly arranged on the outer part of the mounting abutting block, a guide rod is slidably mounted in the middle of the fixing plate, a spring is arranged on the outer part of the guide rod, a sealing plate is arranged at the bottom end of the guide rod, the sealing plate is movably stuck to the outer edge of one end of the clamping rod, and both ends of the spring are connected to the outer walls of the mutually close sides of the fixing plate and the sealing plate respectively.

[0012] Preferably, sliding rods are symmetrically arranged on the outer walls of both sides of the storage box, baffles are respectively slidably mounted on the outer parts of the two sliding rods, casings are arranged at both ends of the side of the storage box far away from the dry-type transformer body, cooling fans are installed inside the casings, and air outlet openings adapted to the cooling fans are formed inside the storage box.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The air cylinder in the telescopic assembly can drive the moving plate and the connected storage box, etc. to approach or move away from the dry-type transformer body. In periods with not high temperatures such as non-summer, the dry-type transformer body can ventilate and dissipate heat by itself, leaving enough heat dissipation space for it, and at the same time facilitating the later maintenance and repair of the dry-type transformer body. This flexible heat dissipation method can be adjusted according to actual needs, improving the pertinence and efficiency of heat dissipation.

[0014] The temperature sensor accurately monitors the temperature of the dry-type transformer body in real time. When the temperature is relatively high, the cooling fan is started to send cold air into the storage box. The low-temperature gas generated by the cooling pipes in the storage box is, under the action of the suction pump, sprayed onto the surface and around the dry-type transformer body through the nozzles on the U-shaped tubes. The U-shaped tubes can move driven by the sliders and the lead screw, and accurately control the temperature of the dry-type transformer body with higher heat according to the temperature situation.

[0015] With the set emergency temperature control unit, during special high-temperature periods, through the gas injection device, the liquid CO2 inside the low-temperature storage tank can be transported to the nozzle, and the liquid CO2 absorbs heat to form dry ice particles, which are used to cool the area around the upper part of the dry-type transformer body, preventing the dry-type transformer body from completely failing to work and ensuring the operation safety of the dry-type transformer under extreme conditions; In the interval between two adjacent dry-type transformer bodies, two groups of arc-shaped guide plates arranged in a human shape are reasonably arranged. Their shapes and positions are highly adapted to the heat generation structure of the dry-type transformer body and the movement characteristics of the cooling air flow. When the cooling fan starts and the direct blowing air flow blows towards the dry-type transformer body, it will first come into contact with these two groups of arc-shaped guide plates. Different from traditional simple baffles or non-guided structures, these two groups of arc-shaped guide plates arranged in a human shape can cleverly change the air flow direction. Ordinary structures only block or simply change the air flow path and cannot achieve efficient guidance and full utilization of the air flow. However, for the arc-shaped guide plates, their unique arc design and relative position relationship enable the direct blowing air flow to smoothly guide towards the inside of the dry-type transformer body along the inner wall of the arc-shaped guide plate.

[0016] During the process of the cooling air flow flowing along the inner wall of the arc-shaped guide plate, the inner wall design of the arc-shaped guide plate is also unique. Its inner wall is not a simple smooth curved surface, but is provided with intervals composed of multiple groups of arc-shaped guide strips, and bump structures are arranged between the intervals. These special designs further enhance the friction between the air flow and the arc-shaped guide plate, prompting the air flow to flow closer to the inner wall of the arc-shaped guide plate, reducing the loss and disorder of the air flow. At the same time, small turbulences are generated during the air flow movement, increasing the contact area and contact time between the air flow and the heat-generating part of the dry-type transformer body, thereby more effectively taking away the heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is another perspective schematic diagram of the overall connection structure of the present invention; Figure 3 is a schematic diagram of a partial structure between the storage tank and the U-shaped tube of the present invention; Figure 4 is a schematic diagram of a partial connection structure inside the storage tank of the present invention; Figure 5 is a schematic diagram of the connection structure of the locking and abutting assembly of the present invention; Figure 6 For the present invention Figure 4 is an enlarged schematic diagram of part A in the present invention; Figure 7 For the present invention Figure 5 is an enlarged schematic diagram of part B in the present invention; Figure 8 Schematic diagram of the connection structure between the low-temperature storage tank and the fixed rod of the present invention; Figure 9 Schematic diagram of the dynamic air flow during the lateral movement of the cooling air flow of the present invention.

[0018] In the figure: 1, base; 2, upper frame rod; 3, fixed block; 4, casing; 5, sliding rod; 6, moving plate; 7, cooling fan; 8, baffle; 9, motor; 10, annular pipe; 11, low-temperature storage tank; 12, cylinder; 13, sliding frame; 14, lead screw; 15, storage box; 16, temperature sensor; 17, dry-type transformer main body; 18, gas injection device; 19, nozzle; 20, arc-shaped guide plate; 21, cooling pipe; 22, hose; 23, U-shaped pipe; 24, slider; 25, spray head; 26, air outlet; 27, fixed rod; 28, installation abutting block; 29, suction pump; 30, fixing plate; 31, blocking plate; 32, guide rod; 33, spring; 34, clamping rod; 35, convex block; 36, arc-shaped guide bar; 37, groove. Specific embodiments

[0019] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the limitations of the specific embodiments disclosed below.

[0021] As Figures 1-9 shown, a dry-type transformer with active cooling includes a base 1 and a plurality of dry-type transformer main bodies 17 installed above the base 1. An upper frame rod 2 is commonly provided at the upper ends of the plurality of dry-type transformer main bodies 17. A sliding frame 13 is provided on one side of the outer wall of the upper frame rod 2. The outer wall of the sliding frame 13 is connected to a moving plate 6 through a telescopic mechanism. A storage box 15 is provided on the outer side of the moving plate 6 and close to the dry-type transformer main body 17. A cooling component is provided inside the storage box 15. A low-temperature storage tank 11 is provided at the upper end of the upper frame rod 2. An emergency temperature control unit is provided on the outer edge of the low-temperature storage tank 11. Temperature sensors 16 are provided above each of the plurality of dry-type transformer main bodies 17.

[0022] The telescopic mechanism includes a cylinder 12 fixedly provided on the outer wall of the sliding frame 13, and the telescopic end of the cylinder 12 is connected to the outer side of the moving plate 6; The cylinder 12 can drive the moving plate 6, the storage box 15, and the cooling component away from the dry-type transformer main body 17 except in high-temperature seasons, so that the dry-type transformer main body 17 can dissipate heat through natural ventilation, reduce the following distance, expand its own heat dissipation space, and is also beneficial to the later maintenance of the dry-type transformer main body 17.

[0023] The cooling assembly includes two U-shaped tubes 23 respectively and slidably mounted on both sides of the front end of the storage tank 15. The two U-shaped tubes 23 on the same side are connected by a connecting pipe provided at the common lower end inside. A suction pump 29 is connected to the lower part inside one of the U-shaped tubes 23 through a hose 22. The suction pump 29 is installed at the inner bottom of the storage tank 15. A plurality of spray nozzles 25 are installed outside the U-shaped tubes 23. A cooling pipe 21 is provided inside the storage tank 15; The two U-shaped tubes 23 communicate with each other inside under the connection of the connecting pipe. The suction pump 29 extracts most of the cooling air flow inside the storage tank 15 and transports it to the spray nozzles 25 through the hose 22, so as to reasonably utilize the cooling air flow. It should be specially noted that the hose 22 is a telescopic pipe body.

[0024] The emergency temperature control unit includes an annular pipe 10 provided on the outer edge of the low-temperature storage tank 11. Nozzles 19 are installed at equal distances along the annular direction outside the annular pipe 10. The upper part inside the low-temperature storage tank 11 is connected to the annular pipe 10 through a gas injection device 18 provided; During special high-temperature periods, the gas injection device 18 can transport the liquid CO2 inside the low-temperature storage tank 11 to the inside of the annular pipe 10, and finally spray it around the plurality of dry-type transformer bodies 17 in a surrounding shape from above through the nozzles 19, so as to urgently cool down. It should be specially noted that the gas injection device 18 is composed of components such as a control valve, a compressed air driving device, and an injector; The low-temperature storage tank 11 stores liquid CO2. Under the compression control of the gas injection device 18, the liquid CO2 is ejected through the nozzles 19. Part of the liquid CO2 absorbs heat instantaneously to form dry ice particles. Thus, the dry ice particles falling in a surrounding shape from above can cause the temperature to drop suddenly; The low-temperature storage tank 11 adopts a double-layer vacuum insulation structure, which can reduce the evaporation amount during storage.

[0025] Sliders 24 are jointly provided above the outer sides of the two U-shaped tubes 23 on the same side. The sliders 24 slide above the inside of the storage tank 15. A motor 9 is provided on one side above the storage tank 15. A fixed block 3 is provided above one end of the storage tank 15 away from the motor 9. A lead screw 14 is fixedly provided on the output shaft of the motor 9. One end of the lead screw 14 is rotationally matched with the fixed block 3. The two groups of sliders 24 are arranged in reverse with the threads on the outer surface of the lead screw 14; When the motor 9 is started, it can drive the lead screw 14 to rotate. Through the reverse setting of the threads, the sliders 24 are threadedly engaged with the lead screw 14, and can approach and move away from each other synchronously. In actual use, the purpose is to cooperate to enable the two series-connected U-shaped tubes 23 to be cooled intensively.

[0026] At both ends of the bottom of the low-temperature storage tank 11, fixed rods 27 are provided. On the outer surface of one side of each fixed rod 27, mounting abutting blocks 28 are provided. At the upper and lower ends of the outside of each mounting abutting block 28, locking and abutting components are provided. On both sides inside each mounting abutting block 28, grooves 37 are formed. And in the two groups of grooves 37, clamping rods 34 are movably clamped. On the outer surfaces of the two clamping rods 34, arc-shaped flow guiding plates 20 are provided. On the inner wall of the arc-shaped flow guiding plate 20, multiple groups of arc-shaped guiding strips 36 are provided. And between adjacent two groups of arc-shaped guiding strips 36 on the inner wall of the arc-shaped flow guiding plate 20, multiple groups of irregular convex blocks 35 are provided. When the U-shaped pipe 23 moves to the middle position between two adjacent dry-type transformer bodies 17, the directly blowing air flow can smoothly guide along the inner wall of the arc-shaped flow guiding plate 20 to the other side of the dry-type transformer body 17. During the process of the cooling air flow flowing along the inner wall of the arc-shaped flow guiding plate 20, the arc-shaped flow guiding plate 20 can separate the cooling air flow by virtue of multiple groups of arc-shaped guiding strips 36. The air flow contacts multiple groups of irregularly arranged convex blocks 35, further enhancing the friction force between the air flow and the arc-shaped flow guiding plate 20, prompting the air flow to flow closer to the inner wall of the arc-shaped flow guiding plate 20 and reducing the loss and disorder of the air flow.

[0027] The locking and abutting component includes a fixing plate 30 fixedly arranged on the outside of the mounting abutting block 28. In the middle of the fixing plate 30, a guide rod 32 is slidably mounted. On the outer part of the guide rod 32, a spring 33 is provided. At the bottom end of the guide rod 32, a sealing plate 31 is provided. The sealing plate 31 is movably stuck to the outer edge of one end of the clamping rod 34. The two ends of the spring 33 are respectively connected to the outer walls of the mutually approaching sides of the fixing plate 30 and the sealing plate 31. When installing the arc-shaped flow guiding plate 20, first, the clamping rod 34 needs to squeeze the corresponding spring 33 at the sealing plate 31, making the sealing plate 31 move away from the groove 37, prompting the groove 37 to be exposed. Then, the clamping rod 34 is inserted into the groove 37 of the mounting abutting block 28. After the clamping is completed, the sealing plate 31 is reset under the reset action of the spring 33, and the sealing plate 31 catches the clamping rod 34 at the front edge of the groove 37.

[0028] On both outer walls of the storage box 15, sliding rods 5 are symmetrically arranged. On the outer parts of the two sliding rods 5, baffles 8 are respectively slidably mounted. At both ends of the side of the storage box 15 far away from the dry-type transformer body 17, machine casings 4 are provided. Inside each machine casing 4, a cooling fan 7 is installed. Inside the storage box 15, an air outlet 26 adapted to the cooling fan 7 is formed. Under special summer temperatures, the baffle 8 can be kept in a blocking state. The sliding rod 5 can be pushed flat to one side of the dry-type transformer body 17. When the cooling fan 7 is started, the baffle 8 can block the two ends of the dry-type transformer body 17, reducing the dispersion of the air flow. Through the provided cooling fan 7, cold air can be conveyed into the storage box 15 from the air outlet 26.

[0029] Working principle: When in use, the cylinder 12 can flexibly adjust the position of the moving plate 6 according to the usage requirements. When it is necessary to efficiently cool the dry-type transformer body 17, the cooling fan 7 inside the machine shell 4 starts, and outputs cold air to the inside of the storage tank 15 through the air outlet 26. At the same time, condensed water is also introduced into the cooling pipe 21. The cold air generated by the cold air and the condensed water is adsorbed by the suction pump 29. The two groups of U-shaped pipes 23 in series can blow the cold air flow to the outer surface and the periphery of the dry-type transformer body 17 through the nozzles 25 to cool the heat generated around; It should be specifically noted that the cooling pipe 21 is connected to the evaporator or condenser of the chiller, and the temperature is reduced through the refrigerant cycle; The temperature sensor 16 monitors the temperature in real time and feeds back the data. Through the external controller, the driving motor 9 is started. The driving motor 9 can drive the screw rod 14 to rotate, causing the slider 24 outside the screw rod 14 to move at both ends of the screw rod 14, and the dry-type transformer body 17 with a higher temperature is moved and temperature-controlled to avoid affecting the operation of other dry-type transformer bodies 17 due to the temperature rise of a single dry-type transformer body 17. Then, a suitable shift is made, and in a reciprocating driving mode, the two U-shaped pipes 23 in series control the temperature of the heat. The upper and lower ends of the two U-shaped pipes 23 in series extend to the coils at the upper and lower ends of the dry-type transformer body 17 respectively. Thus, the cooling air flow not only passes through the outer surface of the dry-type transformer body 17 but also flows through the coils at the upper and lower ends, enhancing the cooling effect; When the cooling air flow is sprayed onto the outer surface of the dry-type transformer body 17, the baffle 8 needs to be slid to the outside of one side of the dry-type transformer body 17 in advance to enclose the two ends of the dry-type transformer body 17 and reduce the loss of the cooling air flow. After the cooling air flow impacts the dry-type transformer body 17, it is divided into two streams on both sides. The cooling air flow will pass through the intervals between two adjacent dry-type transformer bodies 17 and blow directly to the arc-shaped deflector 20 at the rear end. During the process of the cooling air flow flowing along the inner wall of the arc-shaped deflector 20, the arc-shaped deflector 20 can separate the cooling air flow by virtue of multiple arc-shaped guide strips 36. The air flow contacts multiple irregularly arranged convex blocks 35, further enhancing the friction between the air flow and the inner wall of the arc-shaped deflector 20, prompting the air flow to flow closer to the inner wall of the arc-shaped deflector 20, reducing the loss and disorder of the air flow, and thus making full use of the cooling air flow and reducing energy consumption; During special high-temperature periods, the gas injection device 18 can transport the CO2 in the low-temperature storage tank 11 to the inside of the annular pipe 10, and finally spray it around multiple dry-type transformer bodies 17 in a surrounding shape from above through the nozzles 19. After absorbing heat, it will vaporize, causing the surrounding temperature to drop suddenly, so as to meet the emergency cooling requirements during special periods.

[0030] The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, various changes and improvements will occur to the present invention, and all these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A dry-type transformer with active cooling, comprising a base (1) and a plurality of dry-type transformer bodies (17) mounted above the base (1), characterized in that: An upper shelf rod (2) is commonly provided at the upper ends of multiple dry-type transformer bodies (17). A sliding frame (13) is provided on one side of the outer part of the upper shelf rod (2). A moving plate (6) is connected to the outer wall of the sliding frame (13) through a telescopic mechanism. A storage box (15) is provided on the outer side of the moving plate (6) and close to the dry-type transformer body (17). A cooling component is provided inside the storage box (15). A low-temperature storage tank (11) is provided at the upper end of the upper shelf rod (2). An emergency temperature control unit is provided on the outer edge of the low-temperature storage tank (11). Temperature sensors (16) are provided above multiple dry-type transformer bodies (17).

2. The dry-type transformer with active cooling according to claim 1, characterized in that: The telescopic mechanism includes a cylinder (12) fixedly provided on the outer wall of the sliding frame (13), and the telescopic end of the cylinder (12) is connected to the outer side of the moving plate (6).

3. A dry-type transformer with active cooling according to claim 1, characterized in that: The cooling component includes two U-shaped tubes (23) respectively and slidably installed on both sides of the front end of the storage box (15). The two U-shaped tubes (23) on the same side are connected through a connecting pipe commonly provided at the lower end inside. The lower part inside one of the U-shaped tubes (23) is connected to a suction pump (29) through a hose (22). The suction pump (29) is installed at the inner bottom of the storage box (15). A plurality of nozzles (25) are installed on the outer part of the U-shaped tube (23). A cooling pipe (21) is provided inside the storage box (15).

4. A dry-type transformer with active cooling according to claim 1, characterized in that: The emergency temperature control unit includes a ring pipe (10) provided on the outer edge of the low-temperature storage tank (11). Nozzles (19) are equidistantly installed on the outer part of the ring pipe (10) along the circumferential direction. The upper part inside the low-temperature storage tank (11) is communicated with the ring pipe (10) through a gas injection device (18).

5. The dry-type transformer with active cooling according to claim 3, wherein: Sliders (24) are commonly provided above the two U-shaped tubes (23) on the same side, and the sliders (24) slide inside the upper part of the storage box (15).

6. The dry-type transformer with active cooling according to claim 5, characterized in that: A motor (9) is provided on one side above the storage box (15). A fixed block (3) is provided above one end of the storage box (15) far from the motor (9). A lead screw (14) is fixedly provided on the output shaft of the motor (9). One end of the lead screw (14) is rotatably matched with the fixed block (3). The two groups of sliders (24) and the threads on the outer surface of the lead screw (14) are arranged in the opposite direction.

7. The dry-type transformer with active cooling according to claim 1, characterized in that: Fixed rods (27) are provided at both ends of the bottom of the low-temperature storage tank (11). Mounting abutting blocks (28) are provided on the outer surface of one side of the fixed rods (27). Locking and abutting components are provided at both the upper and lower ends of the outer part of the mounting abutting blocks (28). Grooves (37) are formed on both sides inside the mounting abutting blocks (28), and clamping rods (34) are movably clamped inside the two groups of grooves (37). Arc-shaped guide plates (20) are provided on the outer surfaces of the two clamping rods (34). Multiple groups of arc-shaped guide strips (36) are provided on the inner wall of the arc-shaped guide plates (20). Multiple groups of irregular convex blocks (35) are provided on the inner wall of the arc-shaped guide plates (20) and between adjacent groups of arc-shaped guide strips (36).

8. A dry-type transformer with active cooling according to claim 7, characterized in that: The lock abutting component includes a fixing plate (30) fixedly arranged outside the mounting abutting block (28). A guide rod (32) is slidably mounted in the middle inside the fixing plate (30). A spring (33) is arranged outside the guide rod (32). A blocking plate (31) is arranged at the bottom end of the guide rod (32). The blocking plate (31) is movably stuck to the outer edge of one end of the clamping rod (34). Two ends of the spring (33) are respectively connected to the outer walls of the fixing plate (30) and the blocking plate (31) close to each other.

9. A dry-type transformer with active cooling according to claim 1, characterized in that: Sliding rods (5) are symmetrically arranged on the outer walls on both sides of the storage box (15). Baffles (8) are respectively and slidably mounted outside the two sliding rods (5). Machine casings (4) are arranged at both ends of the side of the storage box (15) far away from the dry-type transformer body (17). Cooling fans (7) are installed inside the machine casings (4). Air outlets (26) adapted to the cooling fans (7) are formed inside the storage box (15).

Images