A dry-type transformer with active cooling

Abstract

The present invention belongs to the technical field related to transformers, and specifically discloses a dry-type transformer with active cooling, including a base and a plurality of dry-type transformer bodies installed above the base, wherein the upper ends of the plurality of dry-type transformer bodies are commonly provided with an upper rack rod, a slide is provided on an outer side of the upper rack rod, an outer wall of the slide is connected to a moving plate through a telescopic mechanism, a storage box is provided on the outer side 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 rack rod, an emergency temperature control unit is provided on the outer edge of the low-temperature storage tank, and temperature sensors are provided above the plurality of dry-type transformer bodies. The present invention can actively and flexibly control the temperature according to the heat generated by the dry-type transformer body, so that the dry-type transformer is more energy-efficient during the heat dissipation and cooling process.

Description

Technical Field

[0001] The present invention belongs to the technical field related to transformers, and particularly 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 AC voltage. Its main components are a low-voltage coil, a high-voltage coil, and an iron core. Its primary functions include voltage conversion, current conversion, impedance conversion, isolation, and voltage stabilization. The safe and stable operation of the transformer is crucial to the stable operation of circuit systems. Dry-type transformers are typically cooled by a cooling fan.

[0003] The traditional method is to install the cooling fan at the bottom of the dry-type transformer to cool from the bottom up and remove heat. The disadvantage is that dust is easily accumulated, and once the cooling fan is turned on, it consumes a lot of energy. In addition, the heat dissipation effect cannot be specifically guided. The cooling airflow is often difficult to fully cover and act on the key heating parts of the dry-type transformer, resulting in low cooling efficiency and heat accumulation in some areas, 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 technology, and to propose a dry-type transformer with active cooling, comprising a base and a plurality of dry-type transformer bodies installed above the base, the upper ends of the plurality of dry-type transformer bodies are commonly provided with an upper rack rod, a slide is provided on the outer side of the upper rack rod, the outer wall of the slide is connected to a moving plate through a telescopic mechanism, a storage box is provided on the outer side of the moving plate and close to the dry-type transformer body, a cooling assembly is provided inside the storage box, a low-temperature storage tank is provided at the upper end of the upper rack rod, an emergency temperature control unit is provided on the outer edge of the low-temperature storage tank, and temperature sensors are provided above the plurality of dry-type transformer bodies.

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

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

[0007] Preferably, the emergency temperature control unit includes an annular tube arranged on the outer edge of the low-temperature storage tank, and nozzles are installed on the outside of the annular tube at equal distances along the annular direction. The upper part of the interior of the low-temperature storage tank is connected to the annular tube through a gas injection device.

[0008] Preferably, a slider is commonly provided above the exterior of the two U-shaped tubes on the same side, and the slider slides above the interior of the storage box.

[0009] Preferably, a motor is provided on one side above the storage box, a fixed block is provided above the end of the storage box away from the motor, a screw is fixedly provided on the motor output shaft, one end of the screw is rotatably engaged with the fixed block, and the two groups of sliders and the outer surface threads of the screw are arranged in opposite directions.

[0010] Preferably, fixing rods are provided at both ends of the bottom of the low-temperature storage tank, and mounting blocks are provided on the outer surface of one side of the fixing rods. Locking components are provided on the upper and lower ends of the outer side of the mounting blocks. Grooves are provided on both sides of the interior of the mounting blocks, and rods are movably mounted inside the two groups of grooves. Arc-shaped guide plates are provided on the outer surfaces of the two rods, and multiple groups of arc-shaped guide bars are provided on the inner wall of the arc-shaped guide plates. Multiple groups of irregular protrusions are provided on the inner wall of the arc-shaped guide plates and between two adjacent groups of arc-shaped guide bars.

[0011] Preferably, the locking assembly includes a fixed plate fixedly arranged on the outside of the mounting block, a guide rod is slidably installed in the middle of the fixed plate, a spring is provided on the outside of the guide rod, a blocking plate is provided at the bottom end of the guide rod, the blocking plate is movably stuck to the outer edge of one end of the blocking rod, and the two ends of the spring are respectively connected to the outer wall of one side of the fixed plate and the blocking plate close to each other.

[0012] Preferably, sliding rods are symmetrically provided on the outer walls of both sides of the storage box, and baffles are slidably installed on the outside of the two sliding rods. A casing is provided at both ends of the side of the storage box away from the main body of the dry-type transformer, and a cooling fan is installed inside the casing. An air outlet adapted for the cooling fan is opened inside the storage box.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The cylinder in the telescopic assembly can drive the moving plate and the connected storage box to move closer to or away from the dry-type transformer body. During periods of low temperature, such as non-summer, the dry-type transformer body can be ventilated and cooled on its own, leaving it with sufficient heat dissipation space. This also facilitates subsequent maintenance of the dry-type transformer body. This flexible heat dissipation method can be adjusted according to actual needs, improving the targetedness and efficiency of heat dissipation.

[0015] The temperature sensor accurately monitors the temperature of the dry-type transformer body in real time. When the temperature is high, the cooling fan starts to send cold air into the storage box. The low-temperature gas generated by the cooling pipe in the storage box is sprayed onto the surface and surrounding area of ​​the dry-type transformer body through the nozzle on the U-shaped tube under the action of the suction pump. The U-shaped tube can move under the drive of the slider and screw rod to accurately control the temperature of the dry-type transformer body with higher heat according to the temperature conditions.

[0016] The emergency temperature control unit can be set up during high temperature periods. The gas injection device can be used to inject liquid CO2 into the nozzle inside the low-temperature storage tank. The liquid CO2 absorbs heat to form dry ice particles, which cool the area above the dry-type transformer body to prevent the dry-type transformer from completely failing to work, thus ensuring the safe operation of the dry-type transformer under extreme conditions.

[0017] In the interval between two adjacent dry-type transformer bodies, two groups of human-shaped arc-shaped guide plates are rationally arranged. Their shape and position are highly adapted to the heating structure of the dry-type transformer body and the motion characteristics of the cooling airflow. When the cooling fan is started, the direct airflow generated blows towards the dry-type transformer body and will first contact the two groups of arc-shaped guide plates. Unlike traditional simple baffles or unguided structures, these two groups of human-shaped arc-shaped guide plates can cleverly change the direction of the airflow. Ordinary structures only block or simply change the airflow path and cannot achieve efficient guidance and full utilization of the airflow. The unique arc-shaped design and relative position relationship of the arc-shaped guide plates enable the direct airflow to be smoothly guided along the inner wall of the arc-shaped guide plates to the interior of the dry-type transformer body.

[0018] As the cooling airflow flows along the inner wall of the curved guide plate, the inner wall design of the curved guide plate is also unique. Its inner wall is not a smooth simple curved surface, but is spaced with multiple groups of curved guide bars, and there are convex structures between the intervals. These special designs further enhance the friction between the airflow and the curved guide plate, prompting the airflow to flow closer to the inner wall of the curved guide plate, reducing the loss and turbulence of the airflow. At the same time, the airflow generates tiny turbulence during the flow process, increasing the contact area and contact time between the airflow and the heating parts of the dry-type transformer body, thereby more effectively removing heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the overall connection structure of the present invention from another angle;

[0021] Figure 3 This is a schematic diagram of the structure between the storage box and the U-shaped tube of the present invention;

[0022] Figure 4This is a schematic diagram of the connection structure of the inner part of the storage box of the present invention;

[0023] Figure 5 This is a schematic diagram of the connection structure of the locking assembly of the present invention;

[0024] Figure 6 For the present invention Figure 4 A in the middle is an enlarged structural diagram;

[0025] Figure 7 For the present invention Figure 5 The enlarged structural diagram at B in the middle;

[0026] Figure 8 This is a schematic diagram of the connection structure between the cryogenic storage tank and the fixing rod of the present invention;

[0027] Figure 9 This is a schematic diagram of the dynamic airflow of the cooling airflow during the lateral movement of the present invention.

[0028] In the figure: 1. base; 2. upper rack rod; 3. fixing block; 4. casing; 5. slide rod; 6. shift plate; 7. cooling fan; 8. baffle; 9. motor; 10. ring pipe; 11. low-temperature storage tank; 12. cylinder; 13. slide; 14. screw rod; 15. storage box; 16. temperature sensor; 17. dry-type transformer body; 18. gas injection device; 19. nozzle; 20. arc guide plate; 21. cooling pipe; 22. hose; 23. U-shaped pipe; 24. slider; 25. nozzle; 26. air outlet; 27. fixing rod; 28. mounting block; 29. ​​suction pump; 30. fixing plate; 31. blocking plate; 32. guide rod; 33. spring; 34. clamping rod; 35. bump; 36. arc guide bar; 37. groove. DETAILED DESCRIPTION

[0029] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of 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 to the specific embodiments disclosed below.

[0031] like Figures 1-9A dry-type transformer with active cooling is shown, comprising a base 1 and a plurality of dry-type transformer bodies 17 installed above the base 1. A rack rod 2 is commonly provided on the upper ends of the plurality of dry-type transformer bodies 17. A slide 13 is provided on the outer side of the upper rack rod 2. The outer wall of the slide 13 is connected to a movable plate 6 through a telescopic mechanism. A storage box 15 is provided on the outer side of the movable plate 6 and close to the dry-type transformer body 17. A cooling assembly is provided inside the storage box 15. A low-temperature storage tank 11 is provided on the upper end of the upper rack 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 the plurality of dry-type transformer bodies 17.

[0032] The telescopic mechanism includes a cylinder 12 fixedly mounted on the outer wall of the carriage 13, and the telescopic end of the cylinder 12 is connected to the outer side of the shift plate 6;

[0033] The cylinder 12 can drive the moving plate 6, the storage box 15, and the cooling assembly away from the dry-type transformer body 17 except in high-temperature seasons, so that the dry-type transformer body 17 can dissipate heat through natural ventilation, reduce the follow-up distance, expand its own heat dissipation space, and also facilitate the later maintenance of the dry-type transformer body 17.

[0034] The cooling assembly includes two U-shaped tubes 23 slidably mounted on either side of the front end of the storage box 15. The two U-shaped tubes 23 on the same side are connected by a connecting pipe provided at the lower end of the interior. A suction pump 29 is connected to the lower portion of one of the U-shaped tubes 23 via a hose 22. The suction pump 29 is mounted on the inner bottom of the storage box 15. A plurality of nozzles 25 are mounted on the outside of the U-shaped tubes 23. A cooling pipe 21 is provided inside the storage box 15.

[0035] The two U-shaped tubes 23 are internally connected through the connecting pipe. The suction pump 29 extracts most of the cooling airflow inside the storage box 15 and transports it to the nozzle 25 through the hose 22, so that the cooling airflow is reasonably used. It should be noted that the hose 22 is a retractable tube body.

[0036] The emergency temperature control unit includes a ring pipe 10 arranged on the outer edge of the low-temperature storage tank 11. Nozzles 19 are installed on the outside of the ring pipe 10 at equal intervals along the annular direction. The upper part of the low-temperature storage tank 11 is connected to the ring pipe 10 through a gas injection device 18.

[0037] During periods of particularly high temperatures, the gas injection device 18 can transport the liquid CO2 inside the cryogenic storage tank 11 into the ring tube 10, and finally spray it around the multiple dry-type transformer bodies 17 from above through the nozzle 19 in a circular shape, thereby achieving emergency cooling. It should be noted that the gas injection device 18 is composed of components such as a control valve, a compressed air drive device, and an injector;

[0038] Liquid CO2 is stored inside the cryogenic tank 11. Under the compression control of the gas injection device 18, the liquid CO2 is ejected through the nozzle 19. Part of the liquid CO2 instantly absorbs heat and forms dry ice particles. The dry ice particles falling from above can cause the temperature to drop sharply.

[0039] The low-temperature storage tank 11 adopts a double-layer vacuum insulation structure to reduce evaporation during storage.

[0040] A slider 24 is commonly provided on the outer top of the two U-shaped tubes 23 on the same side. The slider 24 slides above the inside of the storage box 15. A motor 9 is provided on one side above the storage box 15. A fixing block 3 is provided above the end of the storage box 15 away from the motor 9. A screw rod 14 is fixed to the output shaft of the motor 9. One end of the screw rod 14 rotates in cooperation with the fixing block 3. The two sets of sliders 24 and the outer surface threads of the screw rod 14 are arranged in opposite directions.

[0041] When the motor 9 is started, the screw rod 14 can be driven to rotate. Through the reverse setting of the thread, the slider 24 cooperates with the thread of the screw rod 14 and can move closer to and away from each other synchronously. In actual use, the purpose is to cooperate so that the two U-shaped tubes 23 in series can be cooled centrally.

[0042] A fixing rod 27 is provided at both ends of the bottom of the cryogenic storage tank 11. A mounting block 28 is provided on the outer surface of one side of the fixing rod 27. Locking components are provided on the upper and lower ends of the mounting block 28. Grooves 37 are provided on both sides of the mounting block 28. A clamping rod 34 is movably mounted inside the two sets of grooves 37. The outer surfaces of the two clamping rods 34 are provided with an arc-shaped guide plate 20. The inner wall of the arc-shaped guide plate 20 is provided with multiple sets of arc-shaped guide bars 36. Multiple sets of irregular protrusions 35 are provided on the inner wall of the arc-shaped guide plate 20 and located between two adjacent sets of arc-shaped guide bars 36.

[0043] When the U-shaped tube 23 moves to the middle of two adjacent groups of dry-type transformer bodies 17, the straight airflow can be smoothly guided to the other side of the dry-type transformer body 17 along the inner wall of the arc-shaped guide plate 20. In the process of the cooling airflow flowing along the inner wall of the arc-shaped guide plate 20, the arc-shaped guide plate 20 can separate the cooling airflow by means of multiple groups of arc-shaped guide bars 36. The airflow contacts multiple groups of irregularly arranged protrusions 35, further enhancing the friction between the airflow and the arc-shaped guide plate 20, prompting the airflow to flow closer to the inner wall of the arc-shaped guide plate 20, and reducing the loss and turbulence of the airflow.

[0044] The locking assembly includes a fixing plate 30 fixedly mounted on the outside of the mounting block 28, a guide rod 32 slidably mounted in the middle of the fixing plate 30, a spring 33 is provided on the outside of the guide rod 32, a blocking plate 31 is provided at the bottom end of the guide rod 32, the blocking plate 31 is movably attached to the outer edge of one end of the locking rod 34, and the two ends of the spring 33 are respectively connected to the outer wall of the fixing plate 30 and the blocking plate 31 on the side close to each other;

[0045] When installing the arc guide plate 20, the clamping rod 34 first needs to squeeze the spring 33 corresponding to the sealing plate 31, so that the sealing plate 31 is away from the groove 37, causing the groove 37 to be exposed, and then the clamping rod 34 is clamped into the groove 37 of the installation 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 is clamped by the clamping rod 34 at the front edge of the groove 37.

[0046] Slide bars 5 are symmetrically provided on the outer walls of both sides of the storage box 15, and baffles 8 are slidably installed on the outside of the two slide bars 5. A housing 4 is provided at both ends of the storage box 15 away from the dry-type transformer body 17. A cooling fan 7 is installed inside the housing 4. An air outlet 26 adapted to the cooling fan 7 is opened inside the storage box 15;

[0047] Under special summer temperatures, the baffle 8 can be kept in a blocked state, and the slide bar 5 can be pushed horizontally to one side of the dry-type transformer body 17. When the cooling fan 7 is started, the baffle 8 can block the dry-type transformer body 17 at both ends to reduce the dispersion of the airflow;

[0048] The cooling fan 7 can deliver cold air to the interior of the storage box 15 through the air outlet 26 .

[0049] Working principle: During use, the cylinder 12 can flexibly adjust the position of the shift plate 6 according to the needs of use. When the dry-type transformer body 17 needs to be efficiently cooled, the cooling fan 7 inside the casing 4 is started, and the cold air is output to the inside of the storage box 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 condensed water is sucked by the suction pump 29. The two sets of U-shaped tubes 23 connected in series can blow the cold air flow to the outer surface and surrounding area of ​​the dry-type transformer body 17 through the nozzle 25 to cool the heat generated in the surrounding area;

[0050] It should be noted that the cooling pipe 21 is connected to the evaporator or condenser of the chiller to achieve cooling through the circulation of refrigerant;

[0051] The temperature sensor 16 monitors the temperature in real time and feeds back the data. Through the external controller, the drive motor 9 is started, and the 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 to control the temperature, so as to avoid the temperature rise of a single dry-type transformer body 17 affecting the operation of other dry-type transformer bodies 17. Then, appropriate displacement is performed, and the two U-shaped tubes 23 connected in series are driven in a reciprocating manner to control the heat temperature. The upper and lower ends of the two U-shaped tubes 23 connected in series extend to the coils at the upper and lower ends of the dry-type transformer body 17 respectively. The cooling airflow 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, thereby enhancing the cooling effect.

[0052] When the cooling airflow is sprayed toward the outer surface of the dry-type transformer main body 17, the baffle 8 needs to be slid to the outside of one side of the dry-type transformer main body 17 in advance to enclose the dry-type transformer main bodies 17 at both ends to reduce the loss of the cooling airflow. After the cooling airflow hits the dry-type transformer main body 17, it is diverted to both sides. The cooling airflow will pass through the interval between the two adjacent dry-type transformer main bodies 17 and blow directly to the arc-shaped guide plate 20 at the rear end. In the process of the cooling airflow flowing along the inner wall of the arc-shaped guide plate 20, the arc-shaped guide plate 20 can separate the cooling airflow by virtue of the multiple groups of arc-shaped guide bars 36. The airflow contacts the multiple groups of irregularly arranged protrusions 35, further enhancing the friction between the airflow and the arc-shaped guide plate 20, prompting the airflow to flow closer to the inner wall of the arc-shaped guide plate 20, reducing the loss and turbulence of the airflow, thereby making full use of the cooling airflow and reducing energy consumption.

[0053] During special high-temperature periods, the gas injection device 18 can transport the CO2 inside the low-temperature storage tank 11 to the inside of the ring tube 10, and finally spray it in a circular shape around the multiple dry-type transformer bodies 17 from above through the nozzle 19. After absorbing heat, it will vaporize, causing the surrounding temperature to drop sharply, thereby meeting the emergency cooling needs during special periods.

[0054] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. Various changes and improvements are possible without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the invention as claimed.

Claims

1. A dry-type transformer with active cooling, comprising a base and a plurality of dry-type transformer bodies mounted above the base, characterized in that: A rack rod is commonly provided at the upper ends of the main bodies of the multiple dry-type transformers, a slide is provided on one side of the external side of the rack rod, a movable plate is connected to the outer wall of the slide through a telescopic mechanism, a storage box is provided on the external side of the movable plate and close to the main body of the dry-type transformer, a cooling assembly is provided inside the storage box, a low-temperature storage tank is provided at the upper end of the rack rod, an emergency temperature control unit is provided on the outer edge of the low-temperature storage tank, and temperature sensors are provided above the main bodies of the multiple dry-type transformers; Slide rods are symmetrically arranged on the outer walls of both sides of the storage box, and baffles are slidably installed on the outside of the two slide rods. Both ends of the storage box away from the main body of the dry-type transformer are provided with a casing, and a cooling fan is installed inside the casing. An air outlet adapted to the cooling fan is opened inside the storage box; The cooling assembly includes two U-shaped tubes slidably mounted on either side of the front end of the storage box. The two U-shaped tubes on the same side are connected by a connecting pipe provided at the lower end of the interior. A suction pump is connected to the lower part of one of the U-shaped tubes through a hose provided. The suction pump is installed at the bottom of the storage box. Multiple nozzles are installed on the outside of the U-shaped tube. A cooling pipe is provided inside the storage box. Fixed rods are provided at both ends of the bottom of the low-temperature storage tank, and mounting blocks are provided on the outer surface of one side of the fixed rods. Locking blocks are provided on the upper and lower ends of the outer side of the mounting blocks. Grooves are provided on both sides of the inner side of the mounting blocks, and rods are movably installed in the two sets of grooves. Arc-shaped guide plates are provided on the outer surfaces of the two rods, and multiple groups of arc-shaped guide strips are provided on the inner wall of the arc-shaped guide plate. Multiple groups of irregular protrusions are provided on the inner wall of the arc-shaped guide plate and between two adjacent groups of arc-shaped guide strips.

2. The dry-type transformer with active cooling according to claim 1, characterized in that: The telescopic mechanism comprises a cylinder fixedly arranged on the outer wall of the slide, and the telescopic end of the cylinder is connected to the outer side of the moving plate.

3. The dry-type transformer with active cooling according to claim 1, characterized in that: The emergency temperature control unit includes an annular tube arranged on the outer edge of the low-temperature storage tank. Nozzles are installed on the outside of the annular tube at equal distances along the annular direction. The upper part of the interior of the low-temperature storage tank is connected to the annular tube through a gas injection device.

4. The dry-type transformer with active cooling according to claim 1, characterized in that: A sliding block is commonly provided above the exterior of the two U-shaped tubes on the same side, and the sliding block slides above the interior of the storage box.

5. The dry-type transformer with active cooling according to claim 4, characterized in that: A motor is provided on one side above the storage box, a fixed block is provided above the end of the storage box away from the motor, a screw is fixedly provided on the motor output shaft, one end of the screw is rotatably engaged with the fixed block, and the two groups of sliders and the outer surface threads of the screw are arranged in opposite directions.

6. The dry-type transformer with active cooling according to claim 1, characterized in that: The locking assembly includes a fixed plate fixedly arranged on the outside of the mounting block, a guide rod is slidably installed in the middle of the fixed plate, a spring is provided on the outside of the guide rod, a blocking plate is provided at the bottom end of the guide rod, and the blocking plate is movably stuck to the outer edge of one end of the blocking rod, and the two ends of the spring are respectively connected to the outer wall of one side of the fixed plate and the blocking plate close to each other.

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