Box-type transformer with multi-stage cooling function and temperature control system

Abstract

The invention relates to the technical field of multi-stage cooling of box-type transformers, and discloses a multi-stage cooling box-type transformer and a temperature control system.The multi-stage cooling box-type transformer comprises a transformer protection box, a protection cover installed on the top face of the transformer protection box and a protection door rotationally connected to the front face of the transformer protection box through a hinge; according to the transformer protection box, a first-stage air cooling mode, a second-stage water curtain cooling mode and a third-stage water mist cooling mode are automatically switched according to the internal temperature and the external temperature of the transformer, accurate temperature control is achieved, energy waste caused by excessive cooling in a low-temperature interval is avoided, and after water curtains formed by water spraying heads cool air, the cooling efficiency is improved. Water flows back to the water tank through the flow guide plate and the water return pipe and is matched with linkage of a circulating pump and an external cooling device, water resource recycling, energy conservation and environment protection are achieved, water is atomized through the ultrasonic oscillator and then sprayed out through the spraying head, the water-air contact area is increased, and the heat dissipation capacity in the high-temperature environment is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of multi-stage cooling of box-type transformers, in particular to a box-type transformer with multi-stage cooling and a temperature control system. Background Art

[0002] As a complete set of power distribution equipment, the box-type transformer is composed of a transformer, a high-voltage voltage control device, and a low-voltage voltage control device. Its basic principle is to assemble the pressure starting system, armored wire, substation automatic system, DC point and corresponding technical equipment in a reasonable order according to the prescribed sequence, and install all the components into a specific waterproof, dustproof and rodent-proof fully sealed tempered box structure to form a specific transformer. However, the existing box-type transformer will generate a lot of heat inside during operation. Running at a higher temperature will reduce the heat dissipation effect of the box-type transformer, causing the equipment inside the box-type transformer to overheat.

[0003] After searching, a Chinese patent with announcement number CN219979279U discloses a box-type transformer heat dissipation structure, including a box-type transformer, wherein a fixed box is fixedly connected to the right side of the box-type transformer, which can generate cold air to cool the interior of the box-type transformer.

[0004] However, there are still the following problems when cooling the box-type transformer: 1. Since the transformer itself can operate normally at a certain temperature, it is difficult to cool it to different degrees in different temperature ranges in the existing technology, which may cause the temperature to drop to a lower level when the temperature is not high, resulting in energy waste; 2. The existing technology has a relatively simple cooling method for transformers. The basic heat generated by transformers of different sizes is also different. The existing technology is not easy to cool transformers of different sizes in different ways. 3. When the transformer is heated, the internal coil is one of the hottest locations, but it is not easy to specifically cool down a single location in the existing technology. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides a box-type transformer and temperature control system with multi-stage cooling, which mainly solves the problems of energy consumption when cooling the box-type transformer and separate cooling of some areas of the transformer with severe heating.

[0006] To achieve the above object, the present invention provides the following technical solutions: A box-type transformer with multi-stage cooling, comprising a transformer protection box and a protection cover installed on the top surface of the transformer protection box and a protection door connected to the front surface of the transformer protection box by a hinge, wherein a transformer main body is installed inside the transformer protection box, and a first-level cooling component for air cooling the interior of the transformer protection box when the interior is at a low temperature is provided inside the transformer protection box, and a second-level cooling component for water-cooling the air extracted from the first-level cooling component when the interior of the transformer protection box is at a medium temperature is provided on the back of the transformer protection box, and the second-level cooling component comprises a water tank, and a third cooling component is provided inside the water tank for increasing the contact area between the air and the cooling water on the basis of water cooling the air extracted from the first-level cooling component when the interior of the transformer protection box is at a high temperature, and a local cooling component is provided inside the transformer protection box for independently cooling the area of ​​the transformer main body that releases severe heat when the interior of the transformer protection box is at a high temperature.

[0007] Preferably, the first-stage cooling component includes a plurality of spherical wind caps evenly installed on the surface of the protective cover, and a plurality of ventilation holes are evenly and symmetrically opened on both sides of the transformer protective box. A wind collecting scoop is installed inside each ventilation hole by bolts, and the end of the wind collecting scoop facing the inside of the transformer protective box is fixedly connected to the first exhaust pipe, the surface of the first exhaust pipe is covered with a layer of activated carbon cloth pad, the end of the first exhaust pipe away from the wind collecting scoop is fixedly connected to a corrugated hose, and the end of the corrugated hose away from the first exhaust pipe is fixedly connected to an air outlet scoop, the surface of the transformer protective box and the position of the ventilation hole are fixedly connected to a rain shield, the open end of each rain shield is fixedly connected to a dust screen by bolts, and an external temperature sensor is installed on the surface of the transformer protective box.

[0008] Preferably, the first exhaust pipe is an S-shaped structure pipe, and the surface of the first exhaust pipe is provided with placement grooves in the vertical and bottom transverse pipe walls, and is interconnected with the interior of the first exhaust pipe. The first exhaust pipe is provided with two sealing covers at the positions of the placement grooves, and sealing gaskets are provided around the sealing covers. The sealing covers are fixedly connected to the first exhaust pipe by bolts, and a drying layer is adhered to the side of the sealing cover facing the inner wall of the first exhaust pipe.

[0009] Preferably, the first exhaust pipe is located between the two drying layers, and a water hole is opened near the horizontal position of the drying layer, and a water filter is provided on the first exhaust pipe at the position of the water hole.

[0010] Preferably, the secondary cooling component includes a water tank arranged on the back of the transformer protection box, two water pumps are symmetrically installed on the surface of the water tank, and a water pipe is installed at the output end of the water pump, and a gathering shell is installed on the top surface of each of the rain shield shells, and the end of the water pipe away from the water pump is fixedly connected to the corresponding two gathering shells and penetrates each other. A number of water spray heads are evenly installed along the axis on the side of the two connected gathering shells facing the inside of the rain shield shell, and two first guide plates are symmetrically fixedly connected to the bottom surface of the inner wall of the rain shield shell, and the two first guide plates are trapezoidal structures with inclined surfaces facing upwards, and a water trough is provided between the two first guide plates, and the bottom surface of the rain shield shell is located at the position of the water trough and is fixedly connected to a water storage box, and a return pipe is installed on the side of the water storage box, and the other end of the return pipe is inserted into the interior of the water tank, and a one-way valve is installed at one end of the return pipe located in the water storage box, and a circulating pump is installed on the surface of the water tank.

[0011] Preferably, the third cooling component includes two ultrasonic oscillators symmetrically installed inside the water tank, two positioning cylinders are symmetrically fixedly connected to the top surface of the inner wall of the water tank, a first exhaust fan is installed inside each of the positioning cylinders, and an air gathering hopper is installed on the top surface of the water tank at the position of the first exhaust fan, and a steam pipe is fixedly connected to the top of the air gathering hopper, and the end of the steam pipe away from the air gathering hopper is fixedly connected to the other two gathering shells and penetrates each other, and a number of spray heads are evenly fixedly connected to the bottom surfaces of the two connected gathering shells along the axis, and the two water storage boxes are penetrated by a connecting pipe, and the end of the connecting pipe away from the water tank is higher than the other end.

[0012] Preferably, the water spray heads and the spray heads on the two sides are arranged crosswise.

[0013] Preferably, the local cooling component includes a second fan installed on the bottom surface of the protective cover, a second exhaust duct is installed on the bottom surface of the second fan, and the second exhaust duct is symmetrically fixedly connected to two branch air ducts at one end away from the second fan, and the two branch air ducts are fixedly connected to an air condenser at one end away from the second exhaust duct, and the air condenser faces the transformer main body, and an air outlet duct is provided on the top surface of the protective door, and the air outlet duct passes through the protective door and is fixedly connected to the second fan by bolts, and the other end of the air outlet duct is rotatably connected to a dustproof plate through a bearing seat, and a built-in temperature sensor is installed on the inner wall of the transformer protective box.

[0014] Preferably, the bottom surface of the inner wall of the wind collecting hood is fixedly connected to a second guide plate, the top surface of the second guide plate is inclined to one side, the open end of the wind collecting hood is fixedly connected to a water baffle, the bottom surface of the wind collecting hood is fixedly connected to a drain pipe, and the other end of the drain pipe passes through the surface.

[0015] A multi-stage cooling box-type transformer temperature control system, the temperature control system includes a cooling module integration, the cooling module integration includes a primary cooling module, a secondary cooling module, a tertiary cooling module and an independent cooling module, the primary cooling module, the secondary cooling module and the tertiary cooling module are respectively provided with an air cooling module, a water cooling module and a mist cooling module, and the interior of the box-type transformer is provided with an external temperature sensor and a built-in temperature sensor used in conjunction with the primary cooling module, the secondary cooling module, the tertiary cooling module and the independent cooling module; The cooling module is integrated into the following steps when working: S1: When the transformer body is cooled in the first stage, the first stage cooling module is activated. When there is wind outside, the spherical air cap will rotate due to the Bernoulli effect. The wind speed difference causes a pressure difference, driving the sphere to rotate. During the rotation, the internal blades continuously draw in external air and expel the hot air inside, forming forced convection. S2: When there is no wind, the spherical wind cap can also utilize the thermal pressure difference generated by the temperature difference between the inside and outside, the chimney effect, the hot air has a low density, naturally rises and is discharged through the spherical wind cap, and the external cold air is sucked in from the inside of the wind collecting scoop, forming a circulation; S3: When the external temperature sensor detects that the outside temperature reaches a certain range, the secondary cooling module is activated. When the spherical air cap can no longer effectively cool the internal temperature during exhaust, the water pump will extract water from the water tank and spray it out through the sprinkler head, forming a water curtain. The air entering the interior is cooled by the water curtain, and the air cooled by the water curtain cools the interior, thus forming a secondary cooling mode. S4: When the external temperature sensor detects that the external temperature exceeds a certain range, the three-stage cooling module is activated. The ultrasonic oscillator is activated to turn the water inside the water tank into mist, which is then extracted by the first exhaust fan and discharged through the spray head. The area of ​​the mist contacting the air is larger than that of the water curtain, which makes the cooling effect on the air better and the cooling effect on the transformer body better, thus forming a three-stage cooling system. S5: When the internal temperature detected by the built-in temperature sensor exceeds a certain range, the independent cooling module is activated, and the second fan is started to forcefully draw air to the coil position of the transformer body through the wind collecting hood, making the air flow faster at the coil position, thereby achieving a better cooling effect.

[0016] Compared with the prior art, the present invention provides a box-type transformer and temperature control system with multi-stage cooling, which has the following beneficial effects: 1. The present invention automatically switches the cooling modes among the first-stage air cooling, the second-stage water curtain cooling and the third-stage water mist cooling according to the internal and external temperatures of the transformer, thus achieving precise temperature control and avoiding energy waste caused by excessive cooling in the low temperature range.

[0017] 2. After the water curtain formed by the sprinkler head cools the air, the water flows back to the water tank through the guide plate and the return pipe, and cooperates with the circulating pump and the external cooling device to realize the recycling of water resources and save energy and protect the environment.

[0018] 3. The present invention uses an ultrasonic oscillator to atomize water and then sprays it out through a spray nozzle, thereby increasing the water-gas contact area and significantly improving the heat dissipation capacity in high-temperature environments, making it suitable for extreme working conditions.

[0019] 4. The present invention targets high-temperature areas such as transformer coils and accelerates air flow through a wind-collecting hood and a second fan, thereby achieving local rapid cooling and avoiding overload of the overall system.

[0020] 5. The present invention has a double-layer drying layer and activated carbon cloth built into the S-shaped first exhaust pipe, which effectively absorbs moisture in the air and prevents the accumulation of condensed water, ensuring the internal dryness of the equipment and extending its service life.

[0021] 6. The present invention can adjust the position of the air outlet scoop through the telescopic corrugated hose, and cooperate with the cross-arranged water spray head and spray head to adapt to different transformer sizes and heat distributions, with high flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the front three-dimensional structure of a box-type transformer with multi-stage cooling proposed by the present invention; Figure 2 This is a schematic diagram of the rear three-dimensional structure of a box-type transformer with multi-stage cooling proposed by the present invention; Figure 3 This is a schematic diagram of the internal structure of a transformer protection box of a box-type transformer with multi-stage cooling proposed by the present invention; Figure 4 This is a schematic diagram of the water pump and water pipe structure of a box-type transformer with multi-stage cooling proposed by the present invention; Figure 5 This is a schematic diagram of the vertical cross-section structure of a water tank of a box-type transformer with multi-stage cooling proposed by the present invention; Figure 6 This is a schematic diagram of the sealing cover and drying layer structure of a box-type transformer with multi-stage cooling proposed by the present invention; Figure 7 This is a schematic structural diagram of the first exhaust pipe and water filter network of a box-type transformer with multi-stage cooling proposed by the present invention; Figure 8 This is a schematic structural diagram of the second exhaust duct and branch air duct of a box-type transformer with multi-stage cooling proposed by the present invention; Figure 9 This is a schematic diagram of the vertical cross-section structure of the wind collecting cover of a box-type transformer with multi-stage cooling proposed by the present invention; Figure 10 This is a schematic diagram of the water tank and steam pipe structure of a box-type transformer with multi-stage cooling proposed by the present invention; Figure 11 This is a system flow diagram of a box-type transformer temperature control system with multi-stage cooling proposed by the present invention.

[0023] Figure: 1. Transformer protection box; 11. Protection cover; 12. Protection door; 13. Transformer body; 2. Primary cooling assembly; 21. Ball air cap; 22. Air outlet hopper; 23. Primary exhaust pipe; 24. Air collecting hopper; 25. Rain shield; 26. Corrugated hose; 27. Sealing cover; 28. Dust screen; 29. ​​Drying layer; 210. External temperature sensor; 211. Water filter; 3. Secondary cooling assembly; 31. Water tank; 32. Water pump; 33. Water pipe; 34. Air collecting shell; 35. Sprinkler head; 36. Primary guide plate; 37. Water trough; 38. Return pipe; 39. Circulation pump; 310. Water storage box; 4. Third cooling component; 41. Ultrasonic oscillator; 42. First exhaust fan; 43. Positioning cylinder; 44. Air collecting hopper; 45. Steam pipe; 46. Spray head; 47. Connecting pipe; 5. Local cooling component; 51. Second fan; 52. Second exhaust pipe; 53. Branch air duct; 54. Air collecting hood; 55. Air outlet pipe; 56. Dustproof plate; 57. Water baffle; 58. Second guide plate; 59. Drain pipe; 510. Built-in temperature sensor. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). In the description of the present invention, it should be understood that terms such as "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the device or component being referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0026] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0027] See also Figures 1-11 As shown, a box-type transformer with multi-stage cooling includes a transformer protection box 1 and a protection cover 11 installed on the top surface of the transformer protection box 1 and a protection door 12 connected to the front of the transformer protection box 1 by a hinge. A transformer main body 13 is installed inside the transformer protection box 1. The transformer protection box 1 is provided with a first-level cooling component 2 for air cooling the interior of the transformer protection box 1 when the interior is at a low temperature. The back of the transformer protection box 1 is provided with a second-level cooling component 3 for water cooling the air extracted from the first-level cooling component 2 when the interior of the transformer protection box 1 is at a medium temperature. The second-level cooling component 3 includes a water tank 31. The water tank 31 is provided with a third cooling component 4 for increasing the contact area between the air and the cooling water on the basis of water cooling the air extracted from the first-level cooling component 2 when the interior of the transformer protection box 1 is at a high temperature. The transformer protection box 1 is provided with a local cooling component 5 for independently cooling the severe heat release area of ​​the transformer main body 13 when the interior of the transformer protection box 1 is at a high temperature.

[0028] As a complete set of power distribution equipment, the box-type transformer is composed of a transformer, a high-voltage voltage control device, and a low-voltage voltage control device. Its basic principle is to reasonably assemble the pressure starting system, armored wire, substation automatic system, DC point and corresponding technical equipment in a prescribed order. However, the existing box-type transformer will generate a lot of heat inside during operation. Operating at a higher temperature will reduce the heat dissipation effect of the box-type transformer, resulting in overheating of the equipment inside the box-type transformer.

[0029] In the prior art, it is difficult to cool the transformer to different degrees in different temperature ranges, which may cause the temperature to drop to a lower level when the temperature is not high, resulting in energy waste.

[0030] When the transformer body 13 is subjected to the first-level cooling, the spherical air cap 21 will rotate due to the Bernoulli effect when there is wind outside. The wind speed difference causes a pressure difference, driving the sphere to rotate. During the rotation process, the internal blades continuously draw in external air and discharge the hot air inside, forming forced convection. When there is no wind, the spherical wind cap 21 can also utilize the thermal pressure difference generated by the temperature difference between the inside and outside, and the chimney effect. The hot air has a low density and naturally rises and is discharged through the spherical wind cap 21. The external cold air is sucked into the inside of the wind collecting scoop 24, forming a circulation. When the external temperature sensor 210 detects that the outside temperature reaches a certain range and the spherical air cap 21 can no longer effectively cool the internal temperature when exhausting air, the water pump 32 will extract water from the water tank 31 and spray it out through the sprinkler head 35, thereby forming a water curtain. The air entering the interior is cooled by the water curtain, and the interior is cooled by the air cooled by the water curtain, thus forming a secondary cooling method. When the external temperature sensor 210 detects that the outside temperature exceeds a certain range, the ultrasonic oscillator 41 will start to turn the water inside the water tank 31 into a mist, which is then drawn out by the first exhaust fan 42 and discharged through the spray head 46. The mist has a larger area of ​​contact with the air than the water curtain, which has a better cooling effect on the air and the transformer body 13, thus forming a three-stage cooling system. When the internal temperature detected by the built-in temperature sensor 510 exceeds a certain range, the second fan 51 will start and use the wind collecting hood 54 to forcefully draw air to the coil position of the transformer body 13, making the air flow faster at the coil position, thereby achieving a better cooling effect.

[0031] In order to solve the technical problem of air cooling the interior, the present invention adopts a first-level cooling component 2 including a plurality of spherical air caps 21 evenly installed on the surface of the protective cover 11, and a plurality of ventilation holes are evenly and symmetrically opened on both sides of the transformer protective box 1. A wind collecting hopper 24 is installed inside each ventilation hole by bolts, and the end of the wind collecting hopper 24 facing the interior of the transformer protective box 1 is fixedly connected to the first exhaust pipe 23, and the surface of the first exhaust pipe 23 is covered with a layer of activated carbon cloth pad. The end of the first exhaust pipe 23 away from the wind collecting hopper 24 is fixedly connected to the corrugated hose 26, and the end of the corrugated hose 26 away from the first exhaust pipe 23 is fixedly connected to the air outlet hopper 22. The surface of the transformer protective box 1 The ventilation holes are all fixedly connected with rain shield shells 25, and the open end of each rain shield shell 25 is fixedly connected with a dust screen 28 by bolts. The surface of the transformer protection box 1 is installed with an external temperature sensor 210. When the internal temperature is higher than the external temperature, the spherical wind cap 21 uses the thermal pressure difference generated by the internal and external temperature difference to produce a chimney effect. The hot air with low density naturally rises and is discharged through the spherical wind cap 21. The external cold air will enter the interior of the first exhaust pipe 23 through the wind collecting hopper 24, and then enter the interior of the corrugated hose 26 through the first exhaust pipe 23, and then be discharged into the interior through the air outlet hopper 22, thereby realizing the replacement of hot and cold air and cooling the interior of the transformer protection box 1.

[0032] When cooling transformer bodies 13 of different sizes, after the transformer body 13 is installed, force is applied to the air outlet scoop 22 to make the corrugated hose 26 bend, stretch and shrink to different degrees, so that the air outlet scoop 22 can be located below the position to be cooled to prevent it from being blocked.

[0033] In order to solve the technical problem of moist air entering the interior, the present invention adopts an S-shaped structure pipe for the first exhaust pipe 23, and the surface of the first exhaust pipe 23 is provided with a placement groove on the vertical and bottom horizontal pipe walls, and is interconnected with the interior of the first exhaust pipe 23. The first exhaust pipe 23 is provided with two sealing covers 27 at the position of the placement groove, and sealing gaskets are provided on all sides of the sealing cover 27. The sealing cover 27 is fixedly connected to the first exhaust pipe 23 by bolts. A drying layer 29 is adhered to the side of the sealing cover 27 facing the inner wall of the first exhaust pipe 23. The first exhaust pipe 23 is located between the two drying layers 29 and close to the horizontal drying layer 29. A water hole is opened at the position, and a water filter net 211 is set at the position of the water hole in the first exhaust pipe 23. When the humid air enters the interior of the first exhaust pipe 23, it will first contact with the vertical drying layer 29, and the moisture in the air will be absorbed by the drying layer 29. In order to make the air circulation smoother, the drying layer 29 is designed to be a relatively loose honeycomb structure, which may cause the leakage of humid air. The horizontal drying layer 29 can avoid this problem. The flow of cold air inside the first exhaust pipe 23 may cause condensation water to appear on the outer surface of the first exhaust pipe 23, and the condensation water on the surface of the first exhaust pipe 23 will be absorbed by the activated carbon cloth.

[0034] When the drying layer 29 needs to be replaced, the bolt is turned to loosen the limit of the sealing cover 27, and then the sealing cover 27 is moved away from the first exhaust pipe 23. The drying layer 29 will be pulled out from the inside of the first exhaust pipe 23, and then the drying layer 29 is removed from the surface of the sealing cover 27 and a new drying layer 29 is adhered to achieve the replacement of the drying layer 29.

[0035] When the interior of the first exhaust pipe 23 is relatively moist, the vertical drying layer 29 may be unable to absorb the moisture completely and may drip. The dripping water will flow along the inner wall of the first exhaust pipe 23 to the water filter 211 and out from the corresponding through grooves on the bottom surface.

[0036] It should be noted that the drying layer 29 includes textile cloth, silica gel balls and activated carbon, and has good water absorption properties. Those skilled in the art can set it according to actual needs, which will not be described in detail here.

[0037] In order to solve the technical problem of water cooling of air, the present invention adopts a two-stage cooling component 3 including a water tank 31 arranged on the back of the transformer protection box 1, and two water pumps 32 are symmetrically installed on the surface of the water tank 31, and a water pipe 33 is installed at the output end of the water pump 32. The top surface of each rain shield shell 25 is installed with a gathering shell 34, and the end of the water pipe 33 away from the water pump 32 is fixedly connected to the corresponding two gathering shells 34 and penetrates each other. The two connected gathering shells 34 are evenly installed with a number of water heads 35 along the axis on the side facing the inside of the rain shield shell 25, and two first guide plates 36 are symmetrically fixedly connected to the bottom surface of the inner wall of the rain shield shell 25. The two first guide plates 36 are trapezoidal structures with the inclined surfaces facing upwards. A water trough 37 is provided between the two first guide plates 36, and the bottom surface of the rain shield shell 25 is located at the water trough. The position of the water tank 37 is fixedly connected to the water storage box 310, and a return pipe 38 is installed on the side of the water storage box 310. The other end of the return pipe 38 is inserted into the inside of the water tank 31. The return pipe 38 is located at one end of the water storage box 310 and is installed with a one-way valve. A circulation pump 39 is installed on the surface of the water tank 31. When the external temperature sensor 210 detects that the external temperature reaches a certain temperature range, the water pump 32 is connected to the external power supply and then started. The water pump 32 will draw the water inside the water tank 31 into the inside of the water pipe 33, and then discharge it into the inside of the gathering shell 34 through the water pipe 33. The water entering the gathering shell 34 will enter the inside of each sprinkler head 35 and be discharged through the sprinkler head 35 to form a water curtain. The air will pass through the water curtain and be cooled by the water, and the interior will be cooled by the air cooled by the water.

[0038] The water sprayed from the sprinkler head 35 will flow into the interior of the water channel 37 through the guidance of the first guide plate 36, and then into the interior of the water storage box 310 through the water channel 37. When the water pump 32 draws water from the water tank 31, negative pressure will be generated inside the water pump 32, and the water entering the water storage box 310 will flow back to the interior of the water tank 31 through the return pipe 38, thus forming a circulation, which saves water resources. After the water pump 32 stops, the water in the return pipe 38 will not flow back into the interior of the water storage box 310 due to the one-way valve.

[0039] In order to solve the technical problem of mist cooling of air, the present invention adopts a third cooling component 4 including two ultrasonic oscillators 41 symmetrically installed inside the water tank 31, and two positioning cylinders 43 are symmetrically fixedly connected to the top surface of the inner wall of the water tank 31, and a first exhaust fan 42 is installed inside each positioning cylinder 43, and an air collecting hopper 44 is installed at the position of the first exhaust fan 42 on the top surface of the water tank 31, and the top of the air collecting hopper 44 is fixedly connected to a steam pipe 45, and the end of the steam pipe 45 away from the air collecting hopper 44 is fixedly connected to the other two collecting shells 34 and penetrates each other. A number of spray heads 46 are evenly fixedly connected to the bottom surfaces of the two connected collecting shells 34 along the axis, and the two water storage boxes 310 are penetrated by a connecting pipe 47, and the end of the connecting pipe 47 away from the water tank 31 is higher than the other end. The water spray heads 35 and spray heads 46 on both sides are cross-arranged. When the external temperature sensor 210 detects that the external temperature exceeds a certain range, the ultrasonic oscillator 41 is connected to the external The ultrasonic oscillator 41 will break the water inside the water tank 31 into water mist, and then the first exhaust fan 42 will be connected to the external power supply and started. The first exhaust fan 42 will extract the water mist inside the water tank 31 and discharge it into the interior of another gathering shell 34 through the steam pipe 45. The water mist will be discharged through the spray head 46. Because the area of ​​contact between the water mist and the air is larger, the cooling effect on the air is better, thereby achieving strong cooling of the interior. Part of the water mist will fall into the interior of the water storage box 310, and the water mist will converge and integrate the water flow and flow into the interior of another water storage box 310 through the connecting pipe 47, thereby forming a circulation. In order to keep the temperature of the water inside the water tank 31 low at all times, the circulation pump 39 is started. The water inside the water tank 31 is brought into contact with the external cooling device and circulated by the circulation pump 39, so that the temperature of the water inside the water tank 31 is always low. When replenishing water inside the water tank 31, it is necessary to drain water through an external pump.

[0040] The cross-setting of the secondary cooling components 3 and the third cooling components 4 on both sides is to cooperate with the expansion and contraction of the corrugated hose 26, so that the two cooling methods can be used to perform targeted cooling on the areas with the highest heat level of the transformer body 13.

[0041] In order to solve the technical problem of cooling a certain area of ​​the transformer body 13 with serious heating, the present invention adopts a local cooling component 5 including a second fan 51 installed on the bottom of the protective cover 11, and a second exhaust pipe 52 is installed on the bottom of the second fan 51. The second exhaust pipe 52 is symmetrically fixedly connected to two branch air ducts 53 at one end away from the second fan 51, and the two branch air ducts 53 are fixedly connected to an air collecting cover 54 at one end away from the second exhaust pipe 52. The air collecting cover 54 faces the transformer body 13, and an air outlet pipe 55 is provided on the top surface of the protective door 12. The air outlet pipe 55 passes through the protective door 12 and is fixedly connected to the second fan 51 by bolts. The other end of the air outlet pipe 55 is rotatably connected to a dustproof plate 56 through a bearing seat. The inner wall of the transformer protection box 1 is installed with a built-in temperature sensor 510, and the bottom surface of the inner wall of the air collecting cover 54 is fixedly connected to the second guide air duct 51. The top surface of the second guide plate 58 is inclined to one side, the open end of the wind collecting cover 54 is fixedly connected to a water baffle 57, the bottom surface of the wind collecting cover 54 is fixedly connected to a drain pipe 59, and the other end of the drain pipe 59 passes through the surface. When the built-in temperature sensor 510 detects that the internal temperature is higher than a certain range, the second fan 51 will be connected to the external power supply and then started. The second fan 51 will inhale air from the wind collecting cover 54 through the second exhaust pipe 52 and the branch air duct 53. The opening of the wind collecting cover 54 is facing the coil position located at the transformer body 13. Because the coil heats up more seriously, the second fan 51 will increase the air flow rate at the coil position, so that the coil position cools down more efficiently, and the hot air will be discharged through the outlet pipe 55. The dustproof plate 56 will be lifted up by the wind, and when there is no wind, the opening of the outlet pipe 55 will be covered to prevent dust from entering.

[0042] A faster cooling will cause condensation to form on the inner wall of the wind collecting hood 54 , and the condensation will be blocked by the water baffle 57 . The condensation will then flow toward the drain pipe 59 due to the inclination of the second guide plate 58 and finally be discharged through the drain pipe 59 .

[0043] It should be noted that water pumps, fans, etc. are existing technologies, and those skilled in the art can set them according to actual needs, so they will not be described in detail here.

[0044] It should be noted that the temperature sensor is a PT1000 temperature sensor with a high-precision temperature control system.

[0045] A multi-stage cooling box-type transformer temperature control system includes a cooling module integration, which includes a primary cooling module, a secondary cooling module, a tertiary cooling module, and an independent cooling module. The primary cooling module, the secondary cooling module, and the tertiary cooling module are respectively provided with an air cooling module, a water cooling module, and a mist cooling module. The box-type transformer is internally provided with an external temperature sensor 210 and a built-in temperature sensor 510 for use with the primary cooling module, the secondary cooling module, the tertiary cooling module, and the independent cooling module. The present invention is divided into the following steps when used: S1: When the internal temperature is higher than the external temperature, the first-level cooling module is activated. The spherical air cap 21 uses the thermal pressure difference generated by the temperature difference between the inside and the outside to produce a chimney effect. The hot air with low density naturally rises and is discharged through the spherical air cap 21. The external cold air will enter the inside of the first exhaust pipe 23 through the wind collecting scoop 24, and then enter the inside of the corrugated hose 26 through the first exhaust pipe 23, and then be discharged into the interior through the air outlet scoop 22. This realizes the replacement of hot and cold air and realizes the cooling of the inside of the transformer protection box 1. S2: When the moist air enters the first exhaust duct 23, it first contacts the vertical drying layer 29 and is absorbed by the drying layer 29. To ensure smooth air circulation, the drying layer 29 is designed with a loose honeycomb structure, which may cause moist air to leak out. The horizontal drying layer 29 can avoid this problem. The flow of cold air inside the first exhaust duct 23 may cause condensation on the outer surface of the first exhaust duct 23, which will be absorbed by the activated carbon cloth. S3: When the interior of the first exhaust pipe 23 is relatively wet, the vertical drying layer 29 may not be able to fully absorb the water, resulting in dripping. The dripping water will flow along the inner wall of the first exhaust pipe 23 to the water filter 211 and out through the corresponding through grooves on the bottom surface; S4: When the external temperature sensor 210 detects that the external temperature reaches a certain temperature range, the secondary cooling module is activated, the water pump 32 is connected to the external power supply and then started, and the water pump 32 will pump the water inside the water tank 31 into the water pipe 33, and then discharge it into the gathering shell 34 through the water pipe 33. The water entering the gathering shell 34 will enter the interior of each water spray head 35 and be discharged through the water spray head 35 to form a water curtain. The air will pass through the water curtain and be cooled by the water, and the interior of the cooling system will be cooled by the air cooled by the water. S5: When the external temperature sensor 210 detects that the external temperature exceeds a certain range, the three-stage cooling module is activated, and the ultrasonic oscillator 41 is connected to the external power supply and started. The ultrasonic oscillator 41 breaks the water inside the water tank 31 into water mist. Then, the first exhaust fan 42 is connected to the external power supply and started. The first exhaust fan 42 extracts the water mist inside the water tank 31 and discharges it into the interior of another gathering shell 34 through the steam pipe 45. The water mist is discharged through the spray nozzle 46. Since the water mist has a larger contact area with the air, it has a better cooling effect on the air, thereby achieving strong cooling of the interior. S6: When the built-in temperature sensor 510 detects that the internal temperature is higher than a certain range, the independent cooling module is activated, and the second fan 51 is connected to the external power supply and then started. The second fan 51 draws air from the air collecting cover 54 through the second exhaust pipe 52 and the branch air pipe 53. The opening of the air collecting cover 54 faces the coil position located in the transformer body 13. Because the coil is highly heated, the second fan 51 will increase the air flow rate at the coil position, making the coil position more efficient in cooling; S7: A faster temperature drop will cause condensation to form on the inner wall of the wind collecting hood 54. The condensation will be blocked by the water baffle 57, and the condensation will flow to the drain pipe 59 due to the inclination of the second guide plate 58, and finally be discharged through the drain pipe 59.

[0046] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The above-described embodiments merely illustrate several embodiments of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A box-type transformer with multi-stage cooling, comprising a transformer protection box (1), a protection cover (11) mounted on the top surface of the transformer protection box (1), and a protection door (12) rotatably connected to the front surface of the transformer protection box (1) via a hinge, wherein a transformer body (13) is mounted inside the transformer protection box (1), characterized in that: The transformer protection box (1) is provided with a first-stage cooling component (2) for air-cooling the inside of the transformer protection box (1) when the inside is at a low temperature. The back of the transformer protection box (1) is provided with a second-stage cooling component (3) for water-cooling the air extracted by the first-stage cooling component (2) when the inside of the transformer protection box (1) is at a medium temperature. The second-stage cooling component (3) includes a water tank (31). The water tank (31) is provided with a third cooling component (4) for increasing the contact area between the air and the cooling water on the basis of water-cooling the air extracted by the first-stage cooling component (2) when the inside of the transformer protection box (1) is at a high temperature. The transformer protection box (1) is provided with a local cooling component (5) for independently cooling a severe heat release area of ​​the transformer body (13) when the inside of the transformer protection box (1) is at a high temperature.

2. A box-type transformer with multi-stage cooling according to claim 1, characterized in that: The first-stage cooling component (2) includes a plurality of spherical wind caps (21) uniformly installed on the surface of the protective cover (11), and a plurality of ventilation holes are uniformly and symmetrically opened on both sides of the transformer protective box (1), and a wind collecting hopper (24) is installed inside each ventilation hole by bolts, and the end of the wind collecting hopper (24) facing the inside of the transformer protective box (1) is fixedly connected to a first exhaust pipe (23), and the surface of the first exhaust pipe (23) is covered with a layer of activated carbon cloth pad, and the end of the first exhaust pipe (23) away from the wind collecting hopper (24) is fixedly connected to a corrugated hose (26), and the end of the corrugated hose (26) away from the first exhaust pipe (23) is fixedly connected to an air outlet hopper (22), and the surface of the transformer protective box (1) and at the position of the ventilation hole are fixedly connected to a rain shield (25), and the open end of each rain shield (25) is fixedly connected to a dust screen (28) by bolts, and the surface of the transformer protective box (1) is installed with an external temperature sensor (210).

3. The box-type transformer with multi-stage cooling according to claim 2, characterized in that: The first exhaust pipe (23) is an S-shaped structure pipe, and the surface of the first exhaust pipe (23) is provided with placement grooves in the vertical direction and the bottom horizontal pipe wall, and is interconnected with the interior of the first exhaust pipe (23). The first exhaust pipe (23) is provided with two sealing covers (27) at the positions of the placement grooves, and the sealing covers (27) are provided with sealing gaskets on all four sides. The sealing covers (27) are fixedly connected to the first exhaust pipe (23) by bolts, and the side of the sealing cover (27) facing the inner wall of the first exhaust pipe (23) is adhered with a drying layer (29).

4. The box-type transformer with multi-stage cooling according to claim 3, characterized in that: The first exhaust pipe (23) is located between the two drying layers (29), and is provided with a water hole near the horizontal position of the drying layer (29), and a water filter net (211) is provided at the position of the water hole on the first exhaust pipe (23).

5. The box-type transformer with multi-stage cooling according to claim 2, characterized in that: The secondary cooling component (3) includes a water tank (31) arranged on the back of the transformer protection box (1), two water pumps (32) are symmetrically installed on the surface of the water tank (31), and a water pipe (33) is installed at the output end of the water pump (32). The top surface of each rain shield shell (25) is installed with a gathering shell (34), and one end of the water pipe (33) away from the water pump (32) is fixedly connected to the two corresponding gathering shells (34) and penetrates each other. A plurality of water spray heads (35) are evenly installed along the axis on the side of the two connected gathering shells (34) facing the inside of the rain shield shell (25). The rain shield shell (25) ) is symmetrically fixedly connected to the bottom surface of the inner wall of the rain shield (25). The two first guide plates (36) are trapezoidal structures with the inclined surfaces facing upwards. A water trough (37) is provided between the two first guide plates (36), and the bottom surface of the rain shield (25) is located at the position of the water trough (37) and is fixedly connected to a water storage box (310). A return pipe (38) is installed on the side of the water storage box (310), and the other end of the return pipe (38) is inserted into the interior of the water tank (31). A one-way valve is installed at one end of the return pipe (38) located at the water storage box (310), and a circulating pump (39) is installed on the surface of the water tank (31).

6. The box-type transformer with multi-stage cooling according to claim 5, characterized in that: The third cooling component (4) includes two ultrasonic oscillators (41) symmetrically installed inside the water tank (31), two positioning cylinders (43) are symmetrically fixedly connected to the top surface of the inner wall of the water tank (31), and a first exhaust fan (42) is installed inside each positioning cylinder (43). The top surface of the water tank (31) is located at the position of the first exhaust fan (42) and an air gathering hopper (44) is installed. The top of the air gathering hopper (44) is fixedly connected to a steam pipe (45), and the end of the steam pipe (45) away from the air gathering hopper (44) is fixedly connected to the other two gathering shells (34) and is interconnected. The bottom surfaces of the two connected gathering shells (34) are evenly fixedly connected with a plurality of spray heads (46) along the axis. The two water storage boxes (310) are interconnected through a connecting pipe (47), and the end of the connecting pipe (47) away from the water tank (31) is higher than the other end.

7. The box-type transformer with multi-stage cooling according to claim 6, characterized in that: The water spray heads (35) and the spray heads (46) located on both sides are arranged in a cross-type manner.

8. The box-type transformer with multi-stage cooling according to claim 1, characterized in that: The local cooling component (5) includes a second fan (51) installed on the bottom surface of the protective cover (11), a second exhaust pipe (52) is installed on the bottom surface of the second fan (51), and the second exhaust pipe (52) is symmetrically fixedly connected to two branch air pipes (53) at one end away from the second fan (51), and the two branch air pipes (53) are fixedly connected to a wind condenser (54) at one end away from the second exhaust pipe (52), and the wind condenser (54) faces the transformer body (13). An air outlet pipe (55) is provided on the top surface of the protective door (12), and the air outlet pipe (55) passes through the protective door (12) and is fixedly connected to the second fan (51) by bolts. The other end of the air outlet pipe (55) is rotatably connected to a dustproof plate (56) through a bearing seat, and a built-in temperature sensor (510) is installed on the inner wall of the transformer protective box (1).

9. The box-type transformer with multi-stage cooling according to claim 8, characterized in that: The bottom surface of the inner wall of the wind collecting hood (54) is fixedly connected to a second guide plate (58), the top surface of the second guide plate (58) is inclined toward one side, the open end of the wind collecting hood (54) is fixedly connected to a water retaining plate (57), the bottom surface of the wind collecting hood (54) is fixedly connected to a drainage pipe (59), and the other end of the drainage pipe (59) passes through the surface.

10. A temperature control system for a box-type transformer with multi-stage cooling, applicable to a box-type transformer with multi-stage cooling as described in any one of claims 1 to 9, characterized in that: The temperature control system includes a cooling module integration, the cooling module integration includes a primary cooling module, a secondary cooling module, a tertiary cooling module and an independent cooling module, the primary cooling module, the secondary cooling module and the tertiary cooling module are respectively provided with an air cooling module, a water cooling module and a mist cooling module, and the interior of the box-type transformer is provided with an external temperature sensor (210) and a built-in temperature sensor (510) used in conjunction with the primary cooling module, the secondary cooling module, the tertiary cooling module and the independent cooling module; The cooling module is integrated into the following steps when working: S1: When the transformer body (13) is subjected to the first-stage cooling, the first-stage cooling module is activated. When there is wind outside, the spherical wind cap (21) will cause a pressure difference due to the Bernoulli effect, and the wind speed difference will drive the sphere to rotate. During the rotation, the internal blades will continuously inhale the external air and discharge the hot air inside, forming forced convection. S2: When there is no wind, the spherical wind cap (21) can also utilize the thermal pressure difference generated by the temperature difference between the inside and outside, the chimney effect, the hot air has a low density, naturally rises and is discharged through the spherical wind cap (21), and the external cold air is sucked in from the inside of the wind collecting scoop (24), forming a cycle; S3: When the external temperature sensor (210) detects that the outside temperature reaches a certain range, the secondary cooling module is activated. When the spherical air cap (21) can no longer effectively cool the internal temperature during exhaust, the water pump (32) extracts water from the water tank (31) and sprays it out through the water spray head (35), thereby forming a water curtain. The air entering the interior passes through the water curtain and is cooled. The air cooled by the water curtain cools the interior, thereby forming a secondary cooling. S4: When the external temperature sensor (210) detects that the outside temperature exceeds a certain range, the three-stage cooling module is activated, and the ultrasonic oscillator (41) is activated to turn the water inside the water tank (31) into a mist, which is then drawn out by the first exhaust fan (42) and discharged through the spray head (46). The area of ​​the mist contacting the air is larger than that of the water curtain, so that the cooling effect on the air is better, and the cooling effect on the transformer body (13) is better, thereby forming a three-stage cooling; S5: When the internal temperature detected by the built-in temperature sensor (510) exceeds a certain range, the independent cooling module is activated, and the second fan (51) is activated to forcefully draw air to the coil position of the transformer body (13) through the wind collecting hood (54), so that the air flows faster at the coil position, thereby achieving a better cooling effect.

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