Transformer cooling device based on natural resources and using method thereof

Abstract

The invention relates to a transformer cooling device based on natural resources and a using method thereof.The transformer cooling device comprises a tunnel communicated with a transformer room, the middle section of the tunnel is located underground, the underground temperature of the tunnel is lower than the external temperature, a first draught fan is installed in the tunnel, and the output end of the first draught fan is communicated with the transformer room; and the input end of the first fan is communicated with outside air. According to the transformer cooling device based on the natural resources and the using method of the transformer cooling device, the problem that in the prior art, the transformer cooling effect is poor by adopting a natural ventilation mode in high-temperature weather is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of transformer cooling, and in particular to a transformer cooling device based on natural resources and a method of using the same. Background Art

[0002] When a transformer is operating, the windings and core generate heat due to copper losses (heating caused by current) and iron losses (hysteresis and eddy currents). If the temperature is too high, insulating materials (such as oil-coated paper and epoxy resin) will age faster, causing insulation performance to deteriorate or even breakdown, leading to short circuits or fires.

[0003] At present, the transformer and the radiator used to cool the transformer are usually installed in the transformer room, and an air inlet is opened on the side wall of the transformer room, and an air outlet is opened on the top wall of the transformer room. When the transformer is working, the temperature in the transformer room will gradually increase with the working time of the transformer, while the outside air temperature is relatively constant and lower than the temperature in the transformer room. The outside air enters from the air inlet, passes through the transformer and radiator, takes away the heat on its surface, and is discharged from the air outlet, relying on natural wind to cool the transformer.

[0004] However, in recent years, extremely high temperatures have occurred frequently in summer, and the maximum daily temperature in some areas has exceeded 40°C. In high temperature weather, natural ventilation is less effective in cooling transformers. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a transformer cooling device based on natural resources and a method of using the same, so as to solve the problem in the prior art that natural ventilation is used to cool the transformer in poor effect under high temperature weather.

[0006] The present invention is achieved through the following technical solutions:

[0007] A transformer cooling device based on natural resources includes a tunnel connected to a transformer chamber, wherein the middle section of the tunnel is located underground, the underground temperature of the tunnel is lower than the outside temperature, and a first fan is installed in the tunnel, wherein the output end of the first fan is connected to the transformer chamber, and the input end of the first fan is connected to the outside air.

[0008] Furthermore, a first ventilation duct is installed at the air outlet of the transformer chamber, a first filter cover is fixedly connected to the inside of the first ventilation duct, a first rotating shaft is rotatably connected to the first filter cover, the first rotating shaft extends along the length direction of the first ventilation duct, a wind cup is fixedly connected to the upper end of the first rotating shaft, the wind cup is located above the first ventilation duct, a first impeller is fixedly connected to the lower end of the first rotating shaft, and the first impeller is located in the first ventilation duct.

[0009] Furthermore, a first gear is fixedly connected to the first rotating shaft, a second gear is engaged with one side of the first gear, the second gear is rotatably connected to the top wall of the transformer chamber, and a first driving assembly for driving the second gear to rotate is installed on the top wall of the transformer chamber.

[0010] Furthermore, the first drive assembly includes a first motor fixedly mounted on the top wall of the transformer chamber, and an output shaft of the first motor extends downward through the top wall of the transformer chamber and is transmission-connected to the first gear.

[0011] Furthermore, a first through hole is formed in the center of the second gear, and a plurality of protrusions are fixedly connected in the first through hole, and the plurality of protrusions are evenly distributed around the output shaft of the first motor;

[0012] A sleeve is fixedly connected to the output shaft of the first motor, a sleeve is fixedly connected to the side wall of the sleeve, a slider is slidably connected in the sleeve, an elastic support component is installed between the slider and the sleeve, and when the elastic support component is in a stretched state, one end of the slider protrudes from the sleeve and abuts against the corresponding protrusion.

[0013] Furthermore, the elastic support assembly includes a tension spring, both ends of which are fixedly connected to the sliding sleeve and the side walls of the slider respectively. When the tension spring is in a stretched state, one end of the slider protrudes from the sliding sleeve and abuts against the corresponding protrusion.

[0014] Furthermore, a second ventilation duct is installed at the air inlet of the transformer chamber, a second filter cover is fixedly connected to the inside of the second ventilation duct, a second rotating shaft is rotatably connected to the second filter cover, the second rotating shaft extends along the length direction of the second ventilation duct, a second motor is provided at one end of the second rotating shaft, the second motor is fixedly connected to the second filter cover, the output shaft of the second motor is fixedly connected to the second rotating shaft, a second impeller is fixedly connected to the end of the second rotating shaft away from the second motor, and the second impeller is located in the second ventilation duct.

[0015] Furthermore, the second ventilation pipe is connected to a T-shaped pipe, and the two ends of the T-shaped pipe away from the second ventilation pipe are connected to the tunnel and the outside air respectively. An arc plate and a support plate are fixedly connected inside the T-shaped pipe, and a third rotating shaft is provided between the arc plate and the support plate. The two ends of the third rotating shaft are respectively rotatably connected to the arc plate and the support plate. An arc block adapted to the pipe mouth of the T-shaped pipe is fixedly connected to the third rotating shaft, and a second driving assembly for driving the third rotating shaft to rotate is installed on the arc plate.

[0016] Furthermore, the second driving assembly includes a steering gear fixedly connected to the arc-shaped plate, and an output shaft of the steering gear is fixedly connected to the third rotating shaft.

[0017] A method for using a natural resource-based transformer cooling device, comprising a natural resource-based transformer cooling device and a temperature detection component for detecting the surface temperature of the transformer;

[0018] Step 1: Detect the transformer surface temperature through the temperature detection component;

[0019] Step 2: When the transformer surface temperature does not exceed the set value, the outside air directly enters the transformer room through the transformer room air inlet;

[0020] When the transformer surface temperature exceeds the set value, the outside air is sucked into the tunnel through the first fan, and the outside air enters the transformer room after cooling down;

[0021] Step 3: The external air passes through the radiator, takes away the heat from the transformer and the radiator surface, and moves toward the air outlet;

[0022] Step 4: When the transformer surface temperature does not exceed the set value, the gas in the transformer chamber is directly discharged through the air outlet; or when the external gas drives the wind cup to rotate, the wind cup drives the first rotating shaft and the first impeller to rotate, so that the gas in the transformer chamber is discharged from the air outlet at an accelerated speed;

[0023] When the surface temperature of the transformer exceeds the set value, the output shaft of the first motor rotates and, under the action of centrifugal force, throws out the slider to abut against the corresponding side wall of the protrusion, so that it drives the first gear to rotate. During the rotation of the first gear, it drives the second gear to rotate. During the second rotation, it drives the first rotating shaft and the first impeller to rotate, so that the gas in the transformer room is further accelerated to be discharged from the air outlet.

[0024] The beneficial effects of the present invention are:

[0025] This natural resource-based transformer cooling device and its use method utilizes the low underground temperature in the middle section of a tunnel (the constant temperature of the soil results in minimal temperature fluctuations and a stable cooling effect) as a natural cooling source in hot weather. A first fan forces convection, cooling the outside air in the tunnel before delivering it into the transformer compartment. This direct use of natural resources cools the transformer and radiator. Compared to using natural ventilation to cool the transformer in hot weather, this device achieves a superior cooling effect.

[0026] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1A perspective view of a first embodiment of the present invention;

[0028] Figure 2 This is a schematic structural diagram of Embodiment 1 of the present invention;

[0029] Figure 3 For the present invention Figure 2 A partial enlarged view of point A in the middle;

[0030] Figure 4 For the present invention Figure 2 A partial enlarged view of point B in the middle;

[0031] Figure 5 This is a schematic diagram of the partial structure of the first embodiment of the present invention;

[0032] Figure 6 For the present invention Figure 5 A partial enlarged view of point C in the middle;

[0033] Figure 7 A perspective view of a second embodiment of the present invention;

[0034] Figure 8 This is a structural diagram of embodiment 2 of the present invention;

[0035] Figure 9 For the present invention Figure 8 A partial enlarged view of point D in the middle;

[0036] Figure 10 This is a schematic diagram of the partial structure of the second embodiment of the present invention;

[0037] Figure 11 It is a partial structural schematic diagram of the transformer chamber of the present invention.

[0038] In the picture:

[0039] 1. Transformer; 2. Radiator; 3. Transformer chamber; 4. Air inlet; 5. Air outlet; 6. Tunnel; 7. Ground surface; 8. First fan; 9. First ventilation duct; 10. First filter cover; 11. First rotating shaft; 12. Wind cup; 13. First impeller; 14. First gear; 15. Second gear; 16. First drive assembly; 17. First motor; 18. First through hole; 19. Bump; 20. Casing; 21. Sleeve; 22. Slider; 23. Elastic support assembly; 24. Tension spring; 25. Second ventilation duct; 26. Second filter cover; 27. Second rotating shaft; 28. Second motor; 29. Second impeller; 30. T-shaped tube; 31. Arc plate; 32. Support plate; 33. Third rotating shaft; 34. Arc block; 35. Second drive assembly; 36. Servo; 37. Limit block; 38. Limit groove; 39. Scraper; 40. Photovoltaic panel; 41. Energy storage battery; 42. Cable; 43. Gas-liquid separator. DETAILED DESCRIPTION

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0043] In the above description of the present invention, it should be noted that the terms "one side," "the other side," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0044] Furthermore, the term "identical" and similar terms do not necessarily require that the components be absolutely identical; slight variations are permitted. The term "perpendicular" simply refers to the positional relationship between components being more perpendicular than "parallel," not that the structure must be perfectly vertical; rather, it can be slightly tilted.

[0045] Example 1:

[0046] See also Figure 1-6 The present invention provides a technical solution: a transformer cooling device based on natural resources, comprising a tunnel 6 connected to a transformer chamber 3, wherein the middle section of the tunnel 6 is located underground, and the underground temperature of the tunnel 6 is lower than the outside temperature. A first fan 8 is installed in the tunnel 6, wherein the output end of the first fan 8 is connected to the transformer chamber 3, and the input end of the first fan 8 is connected to the outside air.

[0047] In this plan: Tunnel 6 is U-shaped as a whole, and the horizontal section of Tunnel 6 is located ten meters underground (the temperature below ten meters underground is usually lower than the temperature of the surface 7. Below ten meters underground, the soil temperature changes little and remains basically constant. This constant temperature is determined by the local average temperature. Specifically, the ground temperature from five meters to ten meters underground below the surface 7 does not change with the changes in the outdoor atmospheric temperature, and is maintained at fifteen to seventeen degrees Celsius all year round).

[0048] It also includes an electronic thermometer for detecting the surface temperature of the transformer 1 and the outside air temperature. The electronic thermometer is electrically connected to a PLC controller, and the PLC controller is electrically connected to the first fan 8.

[0049] Working principle and usage:

[0050] Step 1: The PLC controller controls the electronic thermometer to detect the surface temperature of the transformer 1 and the outside air temperature. The electronic thermometer outputs an electrical signal to the PLC controller, and the PLC controller determines whether the surface temperature of the transformer 1 or the outside air temperature exceeds the set value (the set value is 40 degrees Celsius).

[0051] Step 2: When the surface temperature of the transformer 1 or the outside air temperature does not exceed the set value, the outside air directly enters the transformer chamber 3 through the air inlet 4 of the transformer chamber 3 .

[0052] When the transformer 1 surface temperature or the ambient air temperature exceeds a set value, the PLC controller controls the first fan 8 to draw ambient air into the tunnel 6. The ambient air cools down and enters the transformer chamber 3. (The speed of the first fan 8 varies depending on the difference in the transformer 1 surface temperature above the set value. For example, if the transformer 1 surface temperature exceeds the set value by 10 degrees Celsius, the speed of the first fan 8 is 1,000 rpm; if the transformer 1 surface temperature exceeds the set value by 20 degrees Celsius, the speed of the first fan 8 is 2,000 rpm; and if the transformer 1 surface temperature exceeds the set value by 30 degrees Celsius, the speed of the first fan 8 is 2,500 rpm.)

[0053] Step 3: The external air passes through the radiator 2 , takes away the heat from the surface of the transformer 1 and the radiator 2 , and is discharged from the air outlet 5 .

[0054] Compared to existing technologies, this system utilizes the low underground temperature in the middle section of tunnel 6 (due to the constant temperature of the soil, underground temperature fluctuations are small, and the cooling effect is stable) as a natural cooling source during hot weather. Forced convection by first fan 8 cools the outside air in tunnel 6 and then delivers it to transformer chamber 3, directly utilizing natural resources to cool transformer 1 and radiator 2. This system achieves a better cooling effect than using natural ventilation to cool transformer 1 during hot weather.

[0055] In this embodiment: a first ventilation pipe 9 is installed at the air outlet 5 of the transformer chamber 3, a first filter cover 10 is fixedly connected to the first ventilation pipe 9, a first rotating shaft 11 is rotatably connected to the first filter cover 10, the first rotating shaft 11 extends along the length direction of the first ventilation pipe 9, the upper end of the first rotating shaft 11 is fixedly connected to a wind cup 12, the wind cup 12 is located above the first ventilation pipe 9, the lower end of the first rotating shaft 11 is fixedly connected to a first impeller 13, the first impeller 13 is located in the first ventilation pipe 9.

[0056] In this solution: a first ventilation pipe 9 is installed at the air outlet 5 of the transformer chamber 3, a first filter cover 10 is fixedly connected inside the first ventilation pipe 9 (the first filter cover 10 filters external debris, reducing the probability of debris falling from the air outlet 5 and damaging the transformer 1), the first filter cover 10 is rotatably connected to a first rotating shaft 11, the first rotating shaft 11 extends along the length direction of the first ventilation pipe 9, the upper end of the first rotating shaft 11 is fixedly connected to a wind cup 12, the wind cup 12 is located above the first ventilation pipe 9, the lower end of the first rotating shaft 11 is fixedly connected to a first impeller 13, and the first impeller 13 is located inside the first ventilation pipe 9.

[0057] The first rotating shaft 11 is further fixedly connected to a scraper 39 , and the scraper 39 is fixedly connected to bristles, which fit the surface of the first filter cover 10 .

[0058] During use, natural wind from the outside causes wind cup 12 to rotate. This rotation drives first rotating shaft 11 and first impeller 13 to rotate, creating negative pressure as first impeller 13 rotates. Hot air within transformer chamber 3 is expelled from air outlet 5 through first ventilation duct 9 at an accelerated rate, improving exhaust efficiency and utilizing natural wind energy without requiring additional energy. Furthermore, the rotation of first rotating shaft 11 drives scraper 39 and bristles to rotate, clearing suspended matter from the surface of first filter cover 10 and preventing clogging.

[0059] In this embodiment: a first gear 14 is fixedly connected to the first rotating shaft 11, a second gear 15 is meshed with one side of the first gear 14, the second gear 15 is rotatably connected to the top wall of the transformer chamber 3, and a first driving assembly 16 for driving the second gear 15 to rotate is installed on the top wall of the transformer chamber 3.

[0060] The first driving assembly 16 includes a first motor 17 fixedly mounted on the top wall of the transformer chamber 3 . The output shaft of the first motor 17 extends downward through the top wall of the transformer chamber 3 and is in driving connection with the first gear 14 .

[0061] In this embodiment, a first gear 14 is fixedly connected to the first rotating shaft 11. One side of the first gear 14 engages with a second gear 15, which is rotatably connected to the top wall of the transformer chamber 3. A first motor 17 is fixedly mounted on the top wall of the transformer chamber 3. The output shaft of the first motor 17 extends downward through the top wall of the transformer chamber 3 and is in driving connection with the first gear 14. The first motor 17 is electrically connected to a PLC controller. A speed sensor is mounted on the top wall of the transformer chamber 3 and is electrically connected to the PLC controller. An annular stopper 37 is fixedly connected to each of the first and second gears 14, 15. A stopper slot 38 is defined in the top wall of the transformer chamber 3 to mate with the stopper 37. The stopper 37 rotatably engages within the stopper slot 38. This restricts the movement of the first and second gears 14, 15 along the length of the first rotating shaft 11, improving the stability of the first and second gears 14, 15 during rotation.

[0062] When the surface temperature of the transformer 1 or the outside air temperature exceeds the set value, and the speed sensor detects that the speed of the wind cup 12 caused by the natural wind is low (less than one thousand revolutions per minute), the PLC controller controls the output shaft of the first motor 17 to rotate, and drives the second gear 15 to rotate. During the rotation of the second gear 15, the first gear 14 is driven to rotate, and the first rotating shaft 11 and the first impeller 13 are driven to rotate in the transformer chamber 3. During the rotation of the first impeller 13, negative pressure is formed, and the hot air in the transformer chamber 3 is accelerated to be discharged from the air outlet 5 through the first ventilation duct 9, further improving the exhaust efficiency. (The speed of the first motor 17 changes according to the difference between the surface temperature of the transformer 1 and the set value. For example, if the surface temperature of the transformer 1 exceeds the set value by ten degrees Celsius, the speed of the first motor 17 is one thousand revolutions per minute; if the surface temperature of the transformer 1 exceeds the set value by twenty degrees Celsius, the speed of the first motor 17 is two thousand revolutions per minute; if the surface temperature of the transformer 1 exceeds the set value by thirty degrees Celsius, the speed of the first motor 17 is two thousand revolutions per minute.)

[0063] In this embodiment, a first through hole 18 is formed at the center of the second gear 15. A plurality of protrusions 19 are fixedly connected to the first through hole 18. The plurality of protrusions 19 are evenly distributed around the output shaft of the first motor 17.

[0064] A sleeve 20 is fixedly connected to the output shaft of the first motor 17, a sleeve 21 is fixedly connected to the side wall of the sleeve 20, a slider 22 is slidably connected in the sleeve 21, and an elastic support component 23 is installed between the slider 22 and the sleeve 21. When the elastic support component 23 is in a stretched state, one end of the slider 22 protrudes from the sleeve 21 and abuts against the corresponding protrusion 19.

[0065] The elastic support assembly 23 includes a tension spring 24 , the two ends of which are fixedly connected to the side walls of the sliding sleeve 21 and the slider 22 respectively. When the tension spring 24 is in a stretched state, one end of the slider 22 protrudes from the sliding sleeve 21 and abuts against the corresponding protrusion 19 .

[0066] In this solution: a first through hole 18 is opened in the center of the second gear 15, and a plurality of protrusions 19 are fixedly connected in the first through hole 18, and the plurality of protrusions 19 are evenly distributed circumferentially around the output shaft of the first motor 17; a sleeve 20 is fixedly connected to the output shaft of the first motor 17, a sleeve 21 is fixedly connected to the side wall of the sleeve 20, a slider 22 is slidably connected in the sleeve 21, and a tension spring 24 is provided between the slider 22 and the sleeve 21, and both ends of the tension spring 24 are fixedly connected to the side walls of the sleeve 21 and the slider 22 respectively. When the tension spring 24 is in a stretched state, one end of the slider 22 protrudes from the sleeve 21 and abuts against the corresponding protrusion 19.

[0067] When the surface temperature of the transformer 1 or the outside air temperature exceeds the set value, and the speed sensor detects that the speed of the wind cup 12 driven by the natural wind is low (less than one thousand revolutions per minute), the output shaft of the first motor 17 is controlled to rotate by the PLC controller. During the rotation of the output shaft of the first motor 17, the centrifugal force causes the slider 22 to be thrown out and abut against the protrusion 19, and drives the second gear 15 to rotate. During the rotation of the second gear 15, the first gear 14 is driven to rotate, and the first rotating shaft 11 and the first impeller 13 are driven to rotate in the transformer chamber 3. During the rotation of the first impeller 13, negative pressure is formed, and the hot air in the transformer chamber 3 is accelerated to be discharged from the air outlet 5 through the first ventilation pipe 9, further improving the exhaust efficiency. (The speed of the first motor 17 changes according to the difference in the external temperature of the transformer 1 exceeding the set value. For example, when the external temperature of the transformer 1 exceeds the set value by ten degrees Celsius, the speed of the first motor 17 is one thousand rpm; when the external temperature of the transformer 1 exceeds the set value by twenty degrees Celsius, the speed of the first motor 17 is two thousand rpm; when the external temperature of the transformer 1 exceeds the set value by thirty degrees Celsius, the speed of the first motor 17 is two thousand five hundred rpm) When the first motor 17 stops, the tension spring 24 resets the slider 22 and disengages from the protrusion 19, so as to prevent the wind cup 12 from rotating due to the natural wind from the outside when the first motor 17 stops, and drives the output shaft of the first motor 17 to be blocked and damaged in the reverse direction through the first rotating shaft 11, the first gear 14 and the second gear 15.

[0068] In this embodiment, a photovoltaic panel 40 is installed on the top of the transformer chamber 3 , the photovoltaic panel 40 is electrically connected to an MPPT controller, and the photovoltaic panel 40 is electrically connected to an energy storage battery 41 through the MPPT controller.

[0069] In this plan:

[0070] When there is sufficient sunlight, photovoltaic power directly supplies power to electrical equipment such as the first wind turbine 8 , the first motor 17 , and the second motor 28 , and the remaining power is stored in the energy storage battery 41 .

[0071] When the sunlight is insufficient, the energy storage battery 41 supplies power to electrical equipment such as the first fan 8, the first motor 17 and the second motor 28. If the battery power is lower than the threshold, it switches to the grid for backup.

[0072] In this embodiment, a cable 42 for power transmission is installed in the tunnel 6 , and the cable 42 extends along the length direction of the tunnel 6 .

[0073] In this solution, cables 42 electrically connect transformer chamber 3, tunnel 6, and external electrical equipment. The tunnel 6 structure solves the problems of cable 42 protection and heat dissipation, while optimizing the power supply efficiency of the equipment.

[0074] In this embodiment: a spiral gas-liquid separator 43 is installed in the tunnel 6, and a drain pipe is connected to the gas-liquid separator 43. A negative pressure pump is installed between the drain pipe and the gas-liquid separator 43. The input end of the negative pressure pump is connected to the gas-liquid separator 43, and the output end is connected to the drain pipe.

[0075] In this solution, after entering the tunnel, the ambient air changes from high temperature to low temperature, and the water vapor in the air condenses into liquid water. Upon entering the gas-liquid separator 43, its internal structure separates the gas and liquid. The gas is expelled, and the liquid water is adsorbed and deposited at the bottom. The input end of the negative pressure pump is connected to the bottom of the gas-liquid separator 43, creating a negative pressure through suction, accelerating the discharge of the separated liquid water. The output end is connected to a drain pipe, which pressurizes the liquid and transports it to a designated discharge point.

[0076] The spiral gas-liquid separator 43 can increase the contact area with the air, adsorb and collect more liquid water, and reduce damage to the electrical equipment in the transformer chamber 3. The spiral gas-liquid separator 43 can also abut against the side walls of the tunnel, providing support for the tunnel and reducing the probability of tunnel collapse.

[0077] Example 2:

[0078] See also Figure 3 and 7-11. The difference between this embodiment and the first embodiment is that a second ventilation pipe 25 is installed at the air inlet 4 of the transformer chamber 3, a second filter cover 26 is fixedly connected in the second ventilation pipe 25, a second rotating shaft 27 is rotatably connected to the second filter cover 26, the second rotating shaft 27 extends along the length direction of the second ventilation pipe 25, a second motor 28 is provided at one end of the second rotating shaft 27, the second motor 28 is fixedly connected to the second filter cover 26, the output shaft of the second motor 28 is fixedly connected to the second rotating shaft 27, a second impeller 29 is fixedly connected to the end of the second rotating shaft 27 away from the second motor 28, and the second impeller 29 is located in the second ventilation pipe 25.

[0079] In this solution, a second ventilation duct 25 is installed at the air inlet 4 of the transformer chamber 3. A second filter cover 26 is fixedly connected within the second ventilation duct 25 (the first filter cover 10 filters external debris, reducing the probability of debris falling into the air outlet 5 and damaging the transformer 1). A second rotating shaft 27 is rotatably connected to the second filter cover 26. The second rotating shaft 27 extends along the length of the second ventilation duct 25. A second motor 28 is disposed at one end of the second rotating shaft 27. The second motor 28 is fixedly connected to the second filter cover 26. The output shaft of the second motor 28 is fixedly connected to the second rotating shaft 27. A second impeller 29 is fixedly connected to the end of the second rotating shaft 27 away from the second motor 28. The second impeller 29 is located within the second ventilation duct 25. The second motor 28 is electrically connected to a PLC controller.

[0080] Working principle and usage:

[0081] Step 1: The PLC controller controls the electronic thermometer to detect the surface temperature of the transformer 1 and the outside air temperature. The electronic thermometer outputs an electrical signal to the PLC controller, and the PLC controller determines whether the surface temperature of the transformer 1 or the outside air temperature exceeds the set value (the set value is 40 degrees Celsius).

[0082] Step 2: When the surface temperature of transformer 1 exceeds the set value and the outside air temperature does not exceed the set value, the PLC controller controls the output shaft of second motor 28 to rotate. This rotation of the output shaft of second motor 28 drives the second rotating shaft 27 and second impeller 29 to rotate, drawing outside air into transformer chamber 3 and accelerating the airflow within transformer chamber 3. (The speed of second motor 28 varies based on the difference in the transformer 1 surface temperature exceeding the set value. For example, if the transformer 1 surface temperature exceeds the set value by 10 degrees Celsius, the speed of second motor 28 is 1,000 rpm; if the transformer 1 surface temperature exceeds the set value by 20 degrees Celsius, the speed of second motor 28 is 2,000 rpm; and if the transformer 1 surface temperature exceeds the set value by 30 degrees Celsius, the speed of second motor 28 is 2,500 rpm.)

[0083] When both the transformer 1 surface temperature and the ambient air temperature exceed the set values, the PLC controller controls the first fan 8 to draw ambient air into the tunnel 6. The ambient air cools down and enters the transformer chamber 3. (The speed of the first fan 8 varies depending on the difference between the transformer 1 surface temperature and the set value. For example, if the transformer 1 surface temperature exceeds the set value by 10 degrees Celsius, the speed of the first fan 8 is 1,000 rpm; if the transformer 1 surface temperature exceeds the set value by 20 degrees Celsius, the speed of the first fan 8 is 2,000 rpm; and if the transformer 1 surface temperature exceeds the set value by 30 degrees Celsius, the speed of the first fan 8 is 2,500 rpm.)

[0084] Step 3: The external air passes through the radiator 2 , takes away the heat from the surface of the transformer 1 and the radiator 2 , and is discharged from the air outlet 5 .

[0085] In this embodiment: the second ventilation pipe 25 is connected to a T-shaped pipe 30, and the two ends of the T-shaped pipe 30 away from the second ventilation pipe 25 are respectively connected to the tunnel 6 and the outside air, and the T-shaped pipe 30 is fixedly connected with an arc plate 31 and a support plate 32, and a third rotating shaft 33 is provided between the arc plate 31 and the support plate 32, and the two ends of the third rotating shaft 33 are respectively rotatably connected to the arc plate 31 and the support plate 32, and the third rotating shaft 33 is fixedly connected with an arc block 34 adapted to the pipe mouth of the T-shaped pipe 30, and the arc plate 31 is installed with a second driving assembly 35 for driving the third rotating shaft 33 to rotate.

[0086] The second driving assembly 35 includes a steering gear 36 fixedly connected to the arc-shaped plate 31 , and an output shaft of the steering gear 36 is fixedly connected to the third rotating shaft 33 .

[0087] In this solution, a T-shaped tube 30 is connected to the second ventilation tube 25. The two ends of the T-shaped tube 30, away from the second ventilation tube 25, are connected to the tunnel 6 and the outside air, respectively. A curved plate 31 and a support plate 32 are fixedly connected within the T-shaped tube 30. A third rotating shaft 33 is disposed between the curved plate 31 and the support plate 32. The two ends of the third rotating shaft 33 are rotatably connected to the curved plate 31 and the support plate 32, respectively. The third rotating shaft 33 is fixedly connected to an curved block 34 that fits the tube opening of the T-shaped tube 30. A servo 36 is fixedly connected to the curved plate 31, and the output shaft of the servo 36 is fixedly connected to the third rotating shaft 33. The servo 36 is electrically connected to a PLC controller. The PLC controller controls the servo 36 to drive the third rotating shaft 33, adjust the position of the curved block 34, select the tunnel 6 or the outside air inlet path, and switch the air source.

[0088] Step 1: The PLC controller controls the electronic thermometer to detect the surface temperature of the transformer 1 and the outside air temperature. The electronic thermometer outputs an electrical signal to the PLC controller, and the PLC controller determines whether the surface temperature of the transformer 1 or the outside air temperature exceeds the set value (the set value is 40 degrees Celsius).

[0089] Step 2: When the external temperature of transformer 1 exceeds the set value and the outside air temperature does not exceed the set value, the PLC controller controls the output shaft of servo 36 to rotate, driving the third rotating shaft 33 and curved block 34 to rotate. The angle of curved block 34 is adjusted so that curved block 34 blocks the pipe opening connecting T-tube 30 to tunnel 6. The PLC controller then controls the output shaft of second motor 28 to rotate. During this rotation, the output shaft of second motor 28 drives the second rotating shaft 27 and second impeller 29 to rotate, drawing outside air into transformer chamber 3 and accelerating the airflow within transformer chamber 3. (The speed of second motor 28 varies based on the difference in the external temperature of transformer 1 exceeding the set value. For example, if the external temperature of transformer 1 exceeds the set value by 10 degrees Celsius, the speed of second motor 28 is 1,000 rpm; if the external temperature of transformer 1 exceeds the set value by 20 degrees Celsius, the speed of second motor 28 is 2,000 rpm; and if the external temperature of transformer 1 exceeds the set value by 30 degrees Celsius, the speed of second motor 28 is 2,500 rpm.)

[0090] When both the transformer 1 surface temperature and the outside air temperature exceed the set values, the PLC controller controls the output shaft of the servo 36 to rotate, driving the third rotating shaft 33 and the curved block 34 to rotate. The angle of the curved block 34 is adjusted so that the curved block 34 blocks the opening of the T-tube 30 that connects to the outside air. The PLC controller then controls the first fan 8 to draw the outside air into the tunnel 6. The outside air cools down and enters the transformer chamber 3. (The speed of the first fan 8 varies according to the difference between the transformer 1 surface temperature and the set value. For example, if the transformer 1 surface temperature exceeds the set value by 10 degrees Celsius, the speed of the first fan 8 is 1,000 rpm; if the transformer 1 surface temperature exceeds the set value by 20 degrees Celsius, the speed of the first fan 8 is 2,000 rpm; and if the transformer 1 surface temperature exceeds the set value by 30 degrees Celsius, the speed of the first fan 8 is 2,500 rpm.)

[0091] Step 3: The external air passes through the radiator 2 , takes away the heat from the surface of the transformer 1 and the radiator 2 , and is discharged from the air outlet 5 .

[0092] Example 3:

[0093] A method for using a transformer cooling device based on natural resources includes the transformer cooling device based on natural resources and a temperature detection component for detecting the surface temperature of the transformer 1. The temperature detection component includes an electronic thermometer for detecting the surface temperature of the transformer 1 and the outside air temperature.

[0094] Step 1: Detect the surface temperature of the transformer 1 through the temperature detection component;

[0095] Step 2: When the surface temperature of the transformer 1 does not exceed the set value, the outside air directly enters the transformer chamber 3 through the air inlet 4 of the transformer chamber 3;

[0096] When the surface temperature of the transformer 1 exceeds the set value, the outside air is sucked into the tunnel 6 through the first fan 8, and the outside air enters the transformer chamber 3 after cooling down;

[0097] Step 3: The external air passes through the radiator 2, takes away the heat from the surface of the transformer 1 and the radiator 2, and moves toward the air outlet 5;

[0098] Step 4: When the surface temperature of the transformer 1 does not exceed the set value, the gas in the transformer chamber 3 is directly discharged through the air outlet 5; or when the external gas drives the wind cup 12 to rotate, the wind cup 12 drives the first rotating shaft 11 and the first impeller 13 to rotate, so that the gas in the transformer chamber 3 is discharged from the air outlet 5 at an accelerated speed;

[0099] When the surface temperature of the transformer 1 exceeds a set value, the output shaft of the first motor 17 rotates and, under the action of centrifugal force, throws out the slider 22 to abut against the side wall of the corresponding protrusion 19, so that it drives the first gear 14 to rotate. During the rotation of the first gear 14, it drives the second gear 15 to rotate. During the second rotation, it drives the first rotating shaft 11 and the first impeller 13 to rotate, so that the gas in the transformer chamber 3 is further accelerated to be discharged from the air outlet 5.

[0100] In this solution: the temperature detection component (electronic thermometer) monitors the surface temperature of the transformer 1 and the outside air temperature in real time. When the temperature of the transformer 1 does not exceed the set value, the system adopts the natural ventilation mode, and the outside air directly enters the transformer chamber 3 through the air inlet 4 for conventional heat dissipation. When the temperature of the transformer 1 exceeds the set value, the system switches to the tunnel 6 cooling mode, starts the first fan 8, draws the outside air into the tunnel 6 for pre-cooling, and then sends it into the transformer chamber 3 to enhance the cooling effect. When there is wind outside, the wind cup 12 rotates due to the wind force, driving the first rotating shaft 11 and the first impeller 13 to rotate, accelerating the discharge of hot air in the transformer chamber 3. When the temperature is too high, the first motor 17 starts, and the centrifugal force causes the slider 22 to be thrown out to engage with the protrusion 19, driving the gear set to rotate, and then driving the first impeller 13 to run at high speed, greatly improving the exhaust efficiency.

[0101] Prioritizing the use of natural resources (geothermal cooling + natural wind power), reducing reliance on mechanical refrigeration, and reducing energy consumption by 30% to 50%. Intelligent temperature control switches, only starting the motor at high temperatures, avoiding unnecessary energy waste.

[0102] By utilizing the constant temperature characteristics of the underground (usually 5 to 15 degrees Celsius lower than the outside temperature), the cooling effect is stable and is not affected by day and night or seasonal temperature fluctuations.

[0103] The dual-mode exhaust (natural wind + auxiliary first motor 17) ensures efficient heat dissipation even under high-temperature conditions, preventing overheating of transformer 1. The first motor 17 is only engaged when needed, avoiding inefficient operation and extending equipment life.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A transformer cooling device based on natural resources, characterized by: The invention comprises a tunnel (6) connected to a transformer room (3), wherein the middle section of the tunnel (6) is located underground, the underground temperature of the tunnel (6) is lower than the outside temperature, and a first fan (8) is installed in the tunnel (6), wherein the output end of the first fan (8) is connected to the transformer room (3), and the input end of the first fan (8) is connected to the outside air.

2. The transformer cooling device based on natural resources according to claim 1, characterized in that: A first ventilation pipe (9) is installed at the air outlet (5) of the transformer chamber (3); a first filter cover (10) is fixedly connected inside the first ventilation pipe (9); a first rotating shaft (11) is rotatably connected to the first filter cover (10); the first rotating shaft (11) extends along the length direction of the first ventilation pipe (9); a wind cup (12) is fixedly connected to the upper end of the first rotating shaft (11); the wind cup (12) is located above the first ventilation pipe (9); a first impeller (13) is fixedly connected to the lower end of the first rotating shaft (11); the first impeller (13) is located inside the first ventilation pipe (9).

3. The transformer cooling device based on natural resources according to claim 2, characterized in that: A first gear (14) is fixedly connected to the first rotating shaft (11), a second gear (15) is meshed with one side of the first gear (14), the second gear (15) is rotatably connected to the top wall of the transformer chamber (3), and a first driving assembly (16) for driving the second gear (15) to rotate is installed on the top wall of the transformer chamber (3).

4. The transformer cooling device based on natural resources according to claim 3, characterized in that: The first drive assembly (16) comprises a first motor (17) fixedly mounted on the top wall of the transformer chamber (3); an output shaft of the first motor (17) extends downward through the top wall of the transformer chamber (3) and is in transmission connection with the first gear (14).

5. The transformer cooling device based on natural resources according to claim 4, characterized in that: A first through hole (18) is provided at the center of the second gear (15), a plurality of protrusions (19) are fixedly connected in the first through hole (18), and the plurality of protrusions (19) are evenly distributed circumferentially around the output shaft of the first motor (17); A sleeve (20) is fixedly connected to the output shaft of the first motor (17), a sliding sleeve (21) is fixedly connected to the side wall of the sleeve (20), a slider (22) is slidably connected in the sliding sleeve (21), an elastic support component (23) is installed between the slider (22) and the sliding sleeve (21), and when the elastic support component (23) is in a stretched state, one end of the slider (22) protrudes from the sliding sleeve (21) and abuts against a corresponding protrusion (19).

6. The transformer cooling device based on natural resources according to claim 5, characterized in that: The elastic support assembly (23) includes a tension spring (24), the two ends of which are fixedly connected to the side walls of the sliding sleeve (21) and the slider (22), respectively. When the tension spring (24) is in a stretched state, one end of the slider (22) protrudes from the sliding sleeve (21) and abuts against the corresponding protrusion (19).

7. The transformer cooling device based on natural resources according to claim 1, characterized in that: A second ventilation pipe (25) is installed at the air inlet (4) of the transformer chamber (3), a second filter cover (26) is fixedly connected in the second ventilation pipe (25), a second rotating shaft (27) is rotatably connected to the second filter cover (26), the second rotating shaft (27) extends along the length direction of the second ventilation pipe (25), a second motor (28) is provided at one end of the second rotating shaft (27), the second motor (28) is fixedly connected to the second filter cover (26), an output shaft of the second motor (28) is fixedly connected to the second rotating shaft (27), a second impeller (29) is fixedly connected to one end of the second rotating shaft (27) away from the second motor (28), and the second impeller (29) is located in the second ventilation pipe (25).

8. The transformer cooling device based on natural resources according to claim 7, characterized in that: The second ventilation pipe (25) is connected to a T-shaped pipe (30), and the two ends of the T-shaped pipe (30) away from the second ventilation pipe (25) are respectively connected to the tunnel (6) and the outside air. The T-shaped pipe (30) is fixedly connected with an arc plate (31) and a support plate (32). A third rotating shaft (33) is provided between the arc plate (31) and the support plate (32). The two ends of the third rotating shaft (33) are respectively rotatably connected to the arc plate (31) and the support plate (32). The third rotating shaft (33) is fixedly connected with an arc block (34) adapted to the pipe mouth of the T-shaped pipe (30). The arc plate (31) is installed with a second driving component (35) for driving the third rotating shaft (33) to rotate.

9. The transformer cooling device based on natural resources according to claim 8, characterized in that: The second driving assembly (35) includes a steering gear (36) fixedly connected to the arc-shaped plate (31), and an output shaft of the steering gear (36) is fixedly connected to the third rotating shaft (33).

10. A method for using a transformer cooling device based on natural resources, comprising the transformer cooling device based on natural resources according to claim 6 and a temperature detection component for detecting the surface temperature of a transformer (1), characterized in that: Step 1: Detecting the surface temperature of the transformer (1) through a temperature detection component; Step 2: When the surface temperature of the transformer (1) does not exceed the set value, the outside air directly enters the transformer chamber (3) through the air inlet (4) of the transformer chamber (3); When the surface temperature of the transformer (1) exceeds a set value, the outside air is sucked into the tunnel (6) through the first fan (8), and the outside air is cooled and then enters the transformer chamber (3); Step 3: The external air passes through the radiator (2), takes away the heat from the surface of the transformer (1) and the radiator (2), and moves toward the air outlet (5); Step 4: When the surface temperature of the transformer (1) does not exceed the set value, the gas in the transformer chamber (3) is directly discharged through the air outlet (5); or when the wind cup (12) is driven by the external gas to rotate, the wind cup (12) drives the first rotating shaft (11) and the first impeller (13) to rotate, so that the gas in the transformer chamber (3) is discharged from the air outlet (5) at an accelerated speed; When the surface temperature of the transformer (1) exceeds a set value, the output shaft of the first motor (17) rotates and, under the action of centrifugal force, throws out the slider (22) to abut against the side wall of the corresponding protrusion (19), thereby driving the first gear (14) to rotate. During the rotation of the first gear (14), the second gear (15) is driven to rotate. During the second rotation, the first rotating shaft (11) and the first impeller (13) are driven to rotate, so that the gas in the transformer chamber (3) is further accelerated to be discharged from the air outlet (5).

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