Single-phase current-limiting mine explosion-proof transformer

Abstract

The application relates to the technical field of transformer safety protection, and discloses a single-phase current-limiting mine explosion-proof transformer which comprises a supporting assembly installed on the ground, an explosion-proof device fixedly connected to the supporting assembly, a transformer main body installed in the explosion-proof device, and a water cooling mechanism connected to the bottom of the explosion-proof device and extending to the ground, wherein the explosion-proof device comprises a structure box connected with the supporting assembly, a plurality of cooling mechanisms are arranged at the top of the structure box, and the two ends of each cooling mechanism are respectively connected with a pressurizing pipe one and a pressurizing pipe two. The composite heat dissipation structure of the cooling mechanism and the underground water cooling mechanism is arranged, high-temperature oil liquid is first subjected to large-area heat absorption in the cooling mechanism through a spraying nozzle and in the space of a heat exchange pipe, the cooled oil liquid is then forcedly pressed into the water cooling box extending to the ground by a pump assembly, deep ground cooling is utilized for high-efficiency cooling again, and the rapid transfer and release of the oil liquid heat are realized.

Description

Technical Field

[0001] This application relates to the field of transformer safety protection technology, and in particular to a single-phase current-limiting explosion-proof transformer for mining. Background Technology

[0002] Currently, in the field of explosion-proof transformer technology for mining applications, due to the harsh working environment, traditional air-cooled transformers often face extreme dust accumulation during operation, resulting in immense heat dissipation pressure. Therefore, mining transformers generally employ oil cooling to create a sealed environment and prevent dust corrosion. However, existing oil cooling systems have a single and inefficient cooling path, with slow heat transfer and cooling rates, making it difficult to meet the heat dissipation requirements of transformers under different operating conditions. In the face of extremely dangerous conditions, existing equipment often fails to provide proactive protection, leading to serious secondary electrical accidents. Therefore, there is an urgent need for a mining explosion-proof transformer that can efficiently and dynamically adapt to pressure resistance and provide proactive protection. Summary of the Invention

[0003] To address the problems of low heat dissipation efficiency and insufficient pressure resistance and safety protection in existing technologies, this application proposes a single-phase current-limiting explosion-proof transformer for mining. It utilizes a water-cooling mechanism and a cooling mechanism extending underground to form a multi-stage composite heat dissipation system. Through the structural design of the explosion-proof device and safety control components, it achieves dynamic pressure adaptation and protection under extreme working conditions, thereby enabling the transformer to operate with high reliability in harsh mining environments.

[0004] This application adopts the following technical solution: a single-phase current-limiting explosion-proof transformer for mining, including a support assembly installed on the ground, an explosion-proof device fixedly connected to the support assembly, a transformer body installed in the explosion-proof device, and a water-cooling mechanism extending underground connected to the bottom of the explosion-proof device; wherein, the explosion-proof device includes a structural box connected to the support assembly, multiple cooling mechanisms are provided on the top of the structural box, and two ends of the cooling mechanisms are respectively connected to a pressure pipe one and a pressure pipe two, the bottom of the pressure pipe one is connected to a control assembly connected to the structural box, and the bottom of the pressure pipe two is connected to a pump assembly connected to the structural box, and the structural box is relatively... One end of the pump feeder is connected to a return flow assembly, which is connected to the control assembly. After heating, the oil undergoes initial cooling through a cooling mechanism, and is then forced to circulate in a water-cooling mechanism by the pump feeder before returning to the structural box via the return flow assembly. By setting up a cooling mechanism and a water-cooling mechanism extending underground, the heated oil is first rapidly cooled by a large area of ​​heat dissipation in the cooling mechanism, and then forced by the pump feeder into the underground water-cooling mechanism for deep ground cooling. Finally, it returns via the return flow assembly, forming a multi-stage heat dissipation process and improving the oil's heat dissipation efficiency. At the same time, the linkage between the control assembly and the pump feeder provides stable power for the oil circulation.

[0005] As a further improvement to the above scheme, the cooling mechanism includes an air-cooled box fixedly connected to the top of the structural box. Both ends of the air-cooled box are fixedly connected to the structural box via conductive pipes, which are respectively connected to pressurizing pipe one and pressurizing pipe two. One end of the conductive pipe connected to pressurizing pipe one is fixedly connected to a central box located inside the air-cooled box. Multiple spray nozzles are fixedly connected to one side of the central box, and a heat exchange pipe located on the air-cooled box is provided on one side of the spray nozzles. A partition plate is provided inside the heat exchange pipe to divide the air-cooled box into two spaces. A guide pipe connecting the two spaces in series is connected to the bottom of the partition plate. A guide nozzle connected to the air-cooled box is provided on one side of the conductive pipe near pressurizing pipe two. The guide nozzle has a funnel-shaped structure, and a sampling pipe is connected to one side of the air-cooled box. High-temperature oil is sprayed out through the central box and the spray nozzles, increasing the contact surface area between the oil and the heat exchange pipe, realizing large-area heat conduction and exchange. The funnel-shaped guide nozzle ensures the stable convergence and discharge of multiple strips of oil.

[0006] As a further improvement to the above scheme, both pressurizing pipe one and pressurizing pipe two are provided with funnel-shaped through holes. Pressurizing pipe one is connected to the control component, and pressurizing pipe two is connected to the pumping component. Through the design of the funnel-shaped through holes, a gradually narrowing fluid channel is formed in the pipeline, which increases the flow rate and pressure of the oil and ensures that the oil has sufficient kinetic energy when entering the cooling mechanism and the pumping component.

[0007] As a further improvement to the above solution, the pump supply assembly includes a functional pipe 1 connected to the bottom end of the second pressurization pipe. The top of the functional pipe 1 is connected to a pressure pipe located directly below the second pressurization pipe. The functional pipe 1 is also connected to a waste oil pipe. The waste oil pipe has a funnel-shaped oil passage hole. Multiple elastic components are fixedly connected inside the waste oil pipe, and the other end of each elastic component is fixedly connected to a sealing plug located inside the oil passage hole. The other end of the functional pipe 1 is connected to an isolation ring, and a volumetric tank fixedly connected to the structural box is fixedly connected to the outside of the isolation ring. The bottom end of the volumetric tank is fixedly connected to an injection pipe connected to the water cooling mechanism. An auxiliary device is also connected to the isolation ring. The elastic components and sealing plugs form a dynamically deformable baffle structure inside the waste oil pipe, realizing multiple cooling requirements. The volumetric tank and the isolation ring provide a sealed environment for the forced injection of oil.

[0008] As a further improvement to the above solution, the auxiliary device includes a temporary storage box fixedly connected to the isolation ring. A movable ring is slidably connected inside the temporary storage box, and an electric telescopic rod fixedly connected to the temporary storage box is fixedly connected to one side of the movable ring. The electric telescopic rod pushes the movable ring to move back and forth. One-way valves are connected to both the functional pipe and the injection pipe. The electric telescopic rod drives the movable ring to reciprocate within the temporary storage box, forming a forced volumetric pumping action. Combined with the one-way conduction characteristic of the one-way valve, it ensures that the cooled oil is stably and high-pressurely injected into the underground water cooling mechanism through the injection pipe, avoiding oil backflow and maintaining the continuous positive pressure of the entire water cooling cycle.

[0009] As a further improvement to the above solution, the control component includes a functional box fixedly connected to the structural box. The functional box is equipped with an extraction chamber. One side of the extraction chamber is connected to an extraction pipe connected to a return assembly. Multiple sets of sensors are fixedly connected inside the extraction chamber. A circulation pump is fixedly connected to the functional box. The output end of the circulation pump is connected to a high-pressure pipe extending into the structural box. One side of the high-pressure pipe is connected to a return pipe located inside the structural box. The input end of the circulation pump is connected to the extraction chamber. The bottom of the first pressurization pipe is connected to a second functional pipe connected to the high-pressure pipe. The pressure and temperature of the oil in the extraction chamber are monitored in real time by sensors, and early warning is given. Multiple components ensure the active flow and uniform heat dissipation of the oil inside the structural box.

[0010] As a further improvement to the above solution, the reflux assembly includes a connecting pipe fixedly connected to the structural box, a filter sleeve slidably and sealingly connected to the outside of the connecting pipe, a connecting sleeve threaded onto the bottom of the filter sleeve, and a cold oil pipe connected to the bottom of the connecting sleeve and connected to the water cooling assembly. The solution filters impurities in the reflux oil through the filter sleeve, preventing foreign objects from entering the water cooling mechanism and clogging the pipeline. At the same time, it facilitates the disassembly of the connecting sleeve and the regular cleaning and maintenance of the filter sleeve, ensuring the long-term unobstructed flow path and reliable sealing.

[0011] As a further improvement to the above scheme, the water-cooling component includes a water-cooled box extending underground. The water-cooled box is hollow and is equipped with three guide chambers: a third guide chamber, a first guide chamber, and a second guide chamber. The bottom end of the cooling oil pipe is connected to the third guide chamber, the first guide chamber is connected to the second guide chamber, and the injection pipe is connected to the second guide chamber. One side of the third guide chamber is connected to multiple exchange pipes, and the other end of the exchange pipe is connected to the first guide chamber. One side of the exchange pipe is connected to an overflow pipe, and a pressure limiting valve is installed on the overflow pipe. The water-cooled box is equipped with multiple second cooling pipes. By burying the water-cooled box deep underground, geothermal heat dissipation is achieved using the constant temperature zone of the stratum. During the process of the oil flowing from the third guide chamber through the exchange pipe to the first guide chamber, it undergoes sufficient heat exchange with the groundwater, realizing deep cooling of the oil. The overflow pipe and the pressure limiting valve constitute the safety pressure relief boundary of the water-cooling system. When the circulating pressure rises abnormally, it automatically overflows, protecting the safety of the overall structure.

[0012] As a further improvement to the above solution, the explosion-proof device also includes heat sinks surrounding the outer perimeter of the structural box, with a series pipe connecting adjacent heat sinks, and multiple protective columns fixedly connected to the top of the structural box. The heat sinks increase the heat dissipation area around the structural box, and the series pipes allow the cooling medium in adjacent heat sinks to be interconnected, forming an overall heat dissipation channel surrounding the box.

[0013] As a further improvement to the above solution, the support assembly includes four support columns fixedly connected to the ground. Two of the support columns have adjustable rods fixedly connected to their top ends, with solar panels rotatably connected to the moving ends of the adjustable rods. The other side of the solar panels slides in contact with the two support columns, and a storage battery is connected to the bottom of the solar panels. The support columns securely mount the entire transformer equipment to the ground, isolating it from some accidental impacts. The rotatable connection structure between the adjustable rods and the solar panels allows the solar panels to adjust according to the external sunlight angle, enabling the collection and storage of light energy in the storage batteries. This provides an independent and reliable power source for the transformer's monitoring sensors and active control components, while also reducing dust accumulation and direct sunlight, ensuring overall heat dissipation.

[0014] Compared with the prior art, the beneficial effects of this application are as follows:

[0015] 1. This invention uses a composite heat dissipation structure combining a cooling mechanism and an underground water cooling mechanism. The high-temperature oil is first sprayed out through nozzles in the cooling mechanism, and then undergoes rapid heat exchange and absorption over a large area in the heat exchange tube space. The cooled oil is then forced into a water-cooled tank extending underground by a pump, where it is cooled again efficiently by deep geothermal cooling, thus achieving rapid transfer and release of heat from the oil.

[0016] 2. By setting an elastic component and a sealing plug in the waste oil pipe of the pump feed assembly to form a structure similar to a water hammer pump, when the pressure in the structure box increases, a corresponding water cooling cycle is forced. With the help of the control component, multi-stage cooling can be formed to adapt to different cooling needs. Attached Figure Description

[0017] Figure 1 This is an overall rear view structural diagram of this application;

[0018] Figure 2 This is the overall front view structural diagram of this application;

[0019] Figure 3 This is a schematic diagram of the front sectional view of the explosion-proof mechanism;

[0020] Figure 4 This is a partial front view of the explosion-proof mechanism.

[0021] Figure 5 This is a partial front view of the cooling mechanism.

[0022] Figure 6 This is a partial front view of the liquid cooling mechanism.

[0023] Figure 7 This is a schematic diagram of the front sectional view of the liquid cooling mechanism;

[0024] Figure 8 This is a partial front view of the pump feed assembly.

[0025] Figure 9 This is a partial front view of the waste oil pipe structure.

[0026] Figure 10 This is a partial front view of the pressurization pipe.

[0027] Explanation of reference numerals in the attached figures:

[0028] 01. Water-cooled box; 02. Injection pipe; 03. Heat sink; 04. Support column; 05. Protective column; 06. Adjusting rod; 07. Solar panel; 08. Air-cooled box; 09. Structural box; 11. Conductor pipe; 12. Series pipe; 13. Functional pipe one; 14. Temporary storage box; 16. Volume box; 17. Return pipe; 18. Circulation pump; 19. Sensor; 20. Extraction chamber; 21. Functional box; 22. Extraction pipe; 23. Cold oil pipe; 24. Connecting sleeve; 25. Filter sleeve; 26. Connecting pipe; 2 7. Functional pipe 2; 28. Pressurization pipe 1; 29. ​​Pressurization pipe 2; 30. High-pressure pipe; 31. Moving ring; 32. Electric telescopic rod; 33. Injector nozzle; 34. Centralized box; 35. Guide pipe; 36. Guide nozzle; 37. Divider plate; 38. Heat exchange pipe; 39. Exchange pipe; 40. Overflow pipe; 41. Guide cavity 1; 42. Guide cavity 2; 43. Guide cavity 3; 44. Cooling pipe 2; 45. Pressure pipe; 46. Waste oil pipe; 47. Isolation ring; 48. Sealing plug; 49. Elastic component. Detailed Implementation

[0029] The present application will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0030] Example 1: As Figure 1 - Figure 8 As shown,

[0031] This embodiment provides a single-phase current-limiting explosion-proof transformer for mining. The transformer includes a support assembly installed on the ground, an explosion-proof device fixedly connected to the support assembly, the transformer body installed in the explosion-proof device, and a water-cooling mechanism extending underground connected to the bottom of the explosion-proof device.

[0032] The support components are firmly erected on the ground, providing a rigid foundation for the entire transformer system and isolating it from surface moisture. The explosion-proof device, as the core pressure-bearing and protective carrier, seals the transformer within and resists the harsh underground environment. The water-cooling mechanism extends deep underground, utilizing the constant temperature zone of the stratum as a natural cold source. The explosion-proof device includes a structural box 09 connected to the support components. The top of the structural box 09 is equipped with multiple cooling mechanisms. The two ends of the cooling mechanisms are respectively connected to a pressure pipe 28 and a pressure pipe 29. The bottom of the pressure pipe 28 is connected to a control component connected to the structural box 09. The structural box 09 is filled with non-conductive oil. The bottom of the pressure pipe 29 is connected to a pump assembly connected to the structural box 09. The end of the structural box 09 opposite the pump assembly is connected to a return assembly. The return assembly is connected to the control assembly. After heating, the oil is rapidly cooled by the cooling mechanism and then forced to circulate in the water-cooling mechanism by the pump assembly and return to the structural box 09 via the return assembly. The transformer generates high temperatures during operation, which are transferred to the oil. Initially, the oil flows upwards inside the structural box 09 due to thermal expansion, entering the cooling mechanism at the top via pressurization pipe 28. In the cooling mechanism, the high-temperature oil undergoes primary heat dissipation through heat exchange. Subsequently, the cooled oil, guided by gravity and pressurization pipe 29, falls into the pump feed assembly. This assembly, acting as a circulation power source, injects the oil into a water-cooling mechanism extending underground, where it is further cooled efficiently by deep geothermal cooling. Finally, the deeply cooled oil flows back to the structural box 09 via the return assembly, forming a complete closed loop.

[0033] The heat dissipation process is broken down into two stages: air cooling and deep ground cooling. By making full use of the large-area heat absorption and constant ground temperature, better heat release is achieved. On the other hand, by controlling the linkage between the components and the pump components, the oil circulation is ensured, so that the oil can maintain a high flow rate and strong heat dissipation under extreme working conditions, ensuring the safety and stability of the entire equipment.

[0034] Example 2: As Figure 1 - Figure 10 As shown,

[0035] The cooling mechanism includes an air-cooled box 08 fixedly connected to the top of the structural box 09. Both ends of the air-cooled box 08 are fixedly connected to the structural box 09 via a connecting pipe 11. The connecting pipes 11 at both ends are respectively connected to a first pressurizing pipe 28 and a second pressurizing pipe 29. The air-cooled box 08 is a sealed container for oil cooling and is connected to the structural box 09 via the connecting pipes 11 at both ends. One end of the connecting pipe 11 connected to the first pressurizing pipe 28 is fixedly connected to a central box 34 located inside the air-cooled box 08. A plurality of spray nozzles 33 are fixedly connected to one side of the central box 34, and a heat exchange pipe 38 located on the air-cooled box 08 is provided on one side of the spray nozzles 33. A partition plate 37 is provided on one side of the heat exchange pipe 38 to divide the air-cooled box 08 into two spaces. A guide pipe 35 connecting the two spaces in series is connected to the bottom of the partition plate 37. A guide nozzle 36 connected to the air-cooled box 08 is provided on the side of the connecting pipe 11 near the second pressurizing pipe 29. When the high-temperature oil, under the pressure increase caused by the internal temperature rise or the extraction and pressurization of the control components, enters the collection box 34 through the pressurization pipe 28 and the conduction pipe 11, the collection box 34 evenly distributes the oil to multiple spray nozzles 33. The spray nozzles 33 continuously spray the high-temperature oil into strip-shaped oil, thereby increasing the heat exchange area and heat exchange efficiency. This physical process increases the surface area of ​​the oil, allowing it to contact the lower-temperature heat exchange pipe 38, achieving large-area heat absorption and transferring the heat of the oil. The sprayed oil is blocked by the partition plate 37 and stays in one space of the air-cooled box 08. The guide pipe 35 at the bottom of the partition plate 37 forms a guide channel connecting the two spaces. The oil must pass downward through the guide pipe 35 to enter the other space near the pressurization pipe 29 for further cooling, and finally enters the conduction pipe 11 on the other side through the guide nozzle 36 to enter the circulation.

[0036] The guide nozzle 36 has a funnel-shaped structure, and a sampling tube is connected to one side of the air-cooled box 08. The funnel-shaped guide nozzle 36 utilizes its tapering geometry to generate a stable convergence and guiding effect on the cooled liquid oil. Furthermore, by changing the area, it changes the outlet pressure to achieve pressurized guiding, ensuring that the oil can flow smoothly and quickly through the guide pipe 11 to the pressurization pipe 29.

[0037] Both pressurizing pipe 28 and pressurizing pipe 29 are equipped with funnel-shaped through holes. Pressurizing pipe 28 is connected to the control assembly, and pressurizing pipe 29 is connected to the pump assembly. The funnel-shaped through holes in pressurizing pipes 28 and 29 create a gradually narrowing fluid cross-section inside the pipeline. According to the Venturi effect in fluid dynamics, when oil flows through this narrowing cross-section, its velocity increases significantly as the cross-section decreases, thus generating a high-speed jet at the narrowest point of the through hole. This ensures sufficient flow velocity and pressure for the oil and prevents fluid stagnation in the pipeline.

[0038] Example 3: As Figure 1 - Figure 10 As shown,

[0039] The pump assembly includes a functional pipe 13 connected to the bottom end of the pressurizing pipe 29. The top of the functional pipe 13 is connected to a pressure pipe 45 located directly below the pressurizing pipe 29. The functional pipe 13 is also connected to a waste oil pipe 46. The waste oil pipe 46 has a funnel-shaped oil passage hole. Multiple elastic components 49 are fixedly connected inside the waste oil pipe 46. The other end of the elastic component 49 is fixedly connected to a sealing plug 48 located inside the oil passage hole. The other end of the functional pipe 13 is connected to an isolation ring 47. The outer side of the isolation ring 47 is fixedly connected to a volume box 16 fixedly connected to the structural box 09. The bottom end of the volume box 16 is fixedly connected to an injection pipe 02 connected to the water cooling mechanism. An auxiliary device is also connected to the isolation ring 47. The elastic component 49 is a resettable elastic element, such as a spring, which can realize the reset of the sealing plug 48.

[0040] The temporary storage tank 14, together with the moving ring 31 and the electric telescopic rod 32, constitute a forced volumetric pumping unit. The electric telescopic rod 32 acts as a linear drive source, propelling the moving ring 31 to reciprocate within the temporary storage tank 14. When the moving ring 31 retracts, the internal volume of the temporary storage tank 14 increases, generating negative pressure. At this time, the one-way valve on the functional pipe 13 opens, drawing the oil, which has undergone initial air cooling, into the temporary storage tank 14. When the moving ring 31 moves forward, the internal volume decreases, generating positive pressure. The one-way valve on the functional pipe 13 closes to prevent backflow, while the one-way valve on the injection pipe 02 opens, forcing the oil under high pressure into the injection pipe 02 and compelling it into the underground water cooling mechanism.

[0041] When the oil temperature is low, the sealing plug 48 is normally open. At this time, the oil cooled by the cooling mechanism flows downward along the functional pipe 13, and the waste oil pipe 46 is in the open state, thus achieving rapid and stable cooling by single air cooling.

[0042] When the oil temperature is high, the pressure inside the structural box 09 begins to gradually increase but has not yet reached the first preset critical point. The pressure pipe 45, acting as a sensitive contact for pressure transmission, directly bears and transmits this surge in pressure downwards. The pressure pipe 45 forces the sealing plug 48 to overcome the pre-tightening force of the elastic component 49, compressing the elastic component 49 and causing displacement deformation. The displacement of the sealing plug 48 partially closes the funnel-shaped oil passage. Through the water hammer effect, the oil continues to move downwards through the functional pipe 13, entering the water-cooling mechanism for further cooling. At this time, the flow of oil in the water-cooling system is periodic and intermittent.

[0043] When the pressure inside the structural box 09 continues to rise and reaches the second preset critical peak, the sealing plug 48 directly blocks the oil passage, and at the same time the electric telescopic rod 32 works, causing the temporary storage box 14 to expand and contract periodically. At this time, in conjunction with the one-way valve on the corresponding functional pipe 13, the oil can be pumped in a periodic manner quickly, thereby forming a rapid periodic air cooling and water cooling to achieve rapid cooling.

[0044] Example 4: Figure 1 - Figure 10 As shown,

[0045] The control assembly includes a function box 21 fixedly connected to the structure box 09. The function box 21 has an extraction chamber 20. One side of the extraction chamber 20 is connected to an extraction pipe 22 connected to the return assembly. Multiple sets of sensors 19 are fixedly connected inside the extraction chamber 20. A circulation pump 18 is fixedly connected to the function box 21. The output end of the circulation pump 18 is connected to a high-pressure pipe 30 extending into the structure box 09. One side of the high-pressure pipe 30 is connected to a return pipe 17 located inside the structure box 09. The input end of the circulation pump 18 is connected to the extraction chamber 20. The bottom of the first pressurization pipe 28 is connected to a second function pipe 27 connected to the high-pressure pipe 30. An audio device and an indicator light are also connected to the outside of the function box 21.

[0046] After being cooled by the water-cooling components, the oil first flows through the extraction pipe 22 into the extraction chamber 20 within the functional box 21. Here, multiple sets of sensors 19 monitor the physical parameters of the oil in real time. The sensors 19 include at least an oil pressure sensor and an oil temperature sensor, used to monitor the oil pressure and temperature thresholds within the extraction chamber 20, respectively. When the transformer is under heavy load, the oil temperature gradually rises. Once the temperature sensor detects that the oil temperature has reached the highest high-temperature warning threshold, or the pressure sensor detects that the oil pressure has reached the preset high-pressure warning threshold, the sensor 19 will immediately trigger a warning command, alerting the downhole personnel through sound and indicator lights, and simultaneously sending control commands to the circulation pump 18 and auxiliary devices to forcibly increase the oil circulation rate to accelerate heat dissipation and pressure relief. Driven by the circulation pump 18, the oil in the extraction chamber 20 is actively extracted and pressurized, then pumped into the high-pressure pipe 30 through the output end of the circulation pump 18. The oil in the high-pressure pipe 30 is divided into two paths: one path flows upward through the functional pipe 27 into the pressurization pipe 28, providing continuous pressure for the split injection of the cooling mechanism; the other path flows back into the bottom of the structural box 09 through the return pipe 17 on one side of the high-pressure pipe 30. The return pipe 17 achieves rapid initial cooling within the structural box 09, thereby accelerating the overall cooling speed.

[0047] The reflux assembly includes a connecting pipe 26 fixedly connected to the structural box 09, a filter sleeve 25 slidably and sealingly connected to the outside of the connecting pipe 26, a connecting sleeve 24 threadedly fitted to the bottom of the filter sleeve 25, and a cold oil pipe 23 connected to the bottom of the connecting sleeve 24 and connected to the water cooling assembly.

[0048] The filter sleeve 25 surrounds the outside of the connecting pipe 26. It contains filter material, which can physically intercept the rising oil in all directions and prevent foreign objects from entering the internal circulation. The connecting pipe 26 and the filter sleeve 25 are connected by a sliding seal, which can easily disassemble the filter sleeve 25 to clean the internal filter material and ensure the continuous and stable operation of the filter.

[0049] Example 5: Figure 1 - Figure 10 As shown,

[0050] The water-cooling assembly includes a water-cooled box 01 extending underground. The water-cooled box 01 is hollow and is equipped with a third flow guide cavity 43, a first flow guide cavity 41, and a second flow guide cavity 42. The bottom end of the cooling oil pipe 23 is connected to the third flow guide cavity 43. The first flow guide cavity 41 is connected to the second flow guide cavity 42. The injection pipe 02 is connected to the second flow guide cavity 42. One side of the third flow guide cavity 43 is connected to multiple exchange pipes 39, and the other end of the exchange pipes 39 is connected to the first flow guide cavity 41. One side of the exchange pipes 39 is connected to an overflow pipe 40, and a pressure limiting valve is installed on the overflow pipe 40. The water-cooled box 01 is equipped with multiple second cooling pipes 44.

[0051] The water-cooled box 01 is buried deep underground, utilizing the constant temperature zone of the stratum for heat absorption. The oil, still warm after heat exchange, is forced into the second guide cavity 42 via the injection pipe 02. Due to the connection between the first guide cavity 41 and the second guide cavity 42, it enters the first guide cavity 41. Subsequently, it is evenly distributed to multiple exchange pipes 39. Within the exchange pipes 39, the oil comes into contact with the surrounding deep groundwater, triggering rapid cooling. Cooling pipes 44 are evenly distributed around the water-cooled box 01, allowing the groundwater to flow and dissipate heat quickly. The oil flows along the long path of the exchange pipes 39, fully releasing heat and achieving deep cooling. Finally, it converges and flows into the third guide cavity 43, and then flows upwards through the cold oil pipe 23 back into the ground structure box 09.

[0052] A pressure relief valve is installed on the overflow pipe 40. When the circulation system expands in volume due to blockage, sudden temperature changes, or abnormal increase in pumping pressure, the pressure relief valve is automatically triggered as the last mechanical safety barrier. The pressure relief valve opens immediately, releasing some of the high-pressure oil through the overflow pipe 40 bypass, thereby instantly reducing the internal pressure of the pipeline and preventing a rapid gas expansion explosion caused by the pressure explosion of high-temperature oil or the combustion of flammable gases generated by high temperature and pressure.

[0053] Example 6: As Figure 1 - Figure 10As shown,

[0054] The explosion-proof device also includes heat sinks 03 surrounding the outer perimeter of the structural box 09. A series pipe 12 connects adjacent heat sinks 03, and multiple protective posts 05 are fixedly connected to the top of the structural box 09. The heat sinks 03 are fixed to the outer perimeter of the structural box 09 in a surrounding array, greatly increasing the contact area between the box and the outside air, and rapidly radiating the heat conducted from inside the transformer to the box wall to the surrounding environment. Adjacent heat sinks 03 are interconnected through the series pipe 12, allowing the cooling oil to form a series flow channel throughout the entire heat sink array surrounding the box, improving overall heat dissipation efficiency.

[0055] Simultaneously, multiple protective posts 05 are fixedly connected to the top of the structural box 09. The protective posts 05 are used to connect high-voltage input wires or high-voltage output wires to reduce the possibility of electric arc generation.

[0056] Example 7: As Figure 1 - Figure 10 As shown,

[0057] The support assembly includes four support columns 04 fixedly connected to the ground. Two of the support columns 04 have adjusting rods 06 fixedly connected to their top ends, and solar panels 07 are rotatably connected to the moving ends of the adjusting rods 06. The other side of the solar panel 07 slides in contact with the two support columns 04, and a storage battery is connected to the bottom of the solar panel 07. Specifically, the four support columns 04 lift and firmly anchor the structural box 09 and all auxiliary components to the ground, forming a physical isolation layer that effectively prevents surface water and mud from eroding the bottom of the box. It also provides ample vertical installation space and pipeline protection for the water-cooling mechanism extending underground. The adjusting rods 06 and the solar panels 07 constitute a dynamic light energy harvesting mechanical motion system. The adjusting rods 06 are typically hydraulic telescopic rods or electric push rods; the telescopic movement of their moving ends drives one side of the solar panel 07 to shift, allowing for continuous adjustment of the pitch angle, thereby improving light energy harvesting efficiency.

[0058] The above embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of protection of this application. Any non-substantial changes and substitutions made by those skilled in the art based on this application shall fall within the scope of protection claimed by this application.

Claims

1. A single-phase current-limiting explosion-proof transformer for mining, characterized in that, It includes a support assembly installed on the ground, on which an explosion-proof device is fixedly connected. The transformer body is installed in the explosion-proof device, and the bottom of the explosion-proof device is connected to a water-cooling mechanism that extends into the ground. The explosion-proof device includes a structural box (09) connected to the support assembly. The top of the structural box (09) is provided with multiple cooling mechanisms. The two ends of the cooling mechanism are respectively connected to a pressure pipe one (28) and a pressure pipe two (29). The bottom of the pressure pipe one (28) is connected to a control assembly connected to the structural box (09). The bottom of the pressure pipe two (29) is connected to a pump supply assembly connected to the structural box (09). The end of the structural box (09) relative to the pump supply assembly is connected to a return assembly. The return assembly is connected to the control assembly. The heated oil is heat exchanged through the cooling mechanism and then forced to undergo oil-water heat exchange in the water cooling mechanism by the pump supply assembly before returning to the structural box (09) through the return assembly.

2. The single-phase current-limiting explosion-proof transformer for mining according to claim 1, characterized in that, The cooling mechanism includes an air-cooled box (08) fixedly connected to the top of the structural box (09). Both ends of the air-cooled box (08) are fixedly connected to a guide pipe (11) connected to the structural box (09). The guide pipe (11) at both ends is connected to a pressure pipe one (28) and a pressure pipe two (29) respectively. One end of the connecting pipe (11) connected to the pressurizing pipe (28) is fixedly connected to a central box (34) located inside the air-cooled box (08). A plurality of spray nozzles (33) are fixedly connected to one side of the central box (34), and a heat exchange pipe (38) located on the air-cooled box (08) is provided on one side of the spray nozzle (33). A partition plate (37) is provided on one side of the heat exchange pipe (38) to divide the air-cooled box (08) into two spaces. A guide pipe (35) connecting the two spaces in series is connected to the bottom of the partition plate (37). A guide nozzle (36) connected to the air-cooled box (08) is provided on one side of the connecting pipe (11) near the pressurizing pipe (29). The guide nozzle (36) has a funnel-shaped structure.

3. A single-phase current-limiting explosion-proof transformer for mining according to claim 2, characterized in that, Both the first pressurizing pipe (28) and the second pressurizing pipe (29) are provided with funnel-shaped through holes, and the first pressurizing pipe (28) is connected to the control component, while the second pressurizing pipe (29) is connected to the pumping component.

4. A single-phase current-limiting explosion-proof transformer for mining according to claim 3, characterized in that, The pumping assembly includes a functional pipe (13) connected to the bottom end of the second pressurizing pipe (29). The top of the functional pipe (13) is connected to a pressure pipe (45) located directly below the second pressurizing pipe (29). The functional pipe (13) is also connected to a waste oil pipe (46). The waste oil pipe (46) is provided with a funnel-shaped oil passage hole. Multiple elastic components (49) are fixedly connected inside the waste oil pipe (46). The other end of the elastic component (49) is fixedly connected to a sealing plug (48) located inside the oil passage hole. The other end of the functional pipe (13) is connected to an isolation ring (47). The outer side of the isolation ring (47) is fixedly connected to a volume box (16) fixedly connected to the structural box (09). The bottom end of the volume box (16) is fixedly connected to an injection pipe (02) connected to the water cooling mechanism. An auxiliary device is also connected to the isolation ring (47).

5. A single-phase current-limiting explosion-proof transformer for mining according to claim 4, characterized in that, The auxiliary device includes a temporary storage box (14) fixedly connected to the isolation ring (47), a movable ring (31) is slidably connected inside the temporary storage box (14), and an electric telescopic rod (32) fixedly connected to the temporary storage box (14) is fixedly connected to one side of the movable ring (31). The electric telescopic rod (32) pushes the movable ring (31) to move back and forth. Both the functional tube (13) and the injection tube (02) are connected to a one-way valve.

6. A single-phase current-limiting explosion-proof transformer for mining according to claim 5, characterized in that, The control component includes a function box (21) fixedly connected to the structure box (09). The function box (21) is provided with an extraction chamber (20). An extraction tube (22) connected to a return assembly is connected to one side of the extraction chamber (20). Multiple sets of sensors (19) are fixedly connected to the extraction chamber (20). A circulation pump (18) is fixedly connected to the function box (21). The output end of the circulation pump (18) is connected to a high-pressure pipe (30) extending into the structure box (09). A return pipe (17) located in the structure box (09) is connected to one side of the high-pressure pipe (30). The input end of the circulation pump (18) is connected to the extraction chamber (20). The bottom of the first pressurizing pipe (28) is connected to a second function pipe (27) connected to the high-pressure pipe (30).

7. A single-phase current-limiting explosion-proof transformer for mining according to claim 6, characterized in that, The reflux assembly includes a connecting pipe (26) fixedly connected to the structural box (09), a filter sleeve (25) slidably and sealingly connected to the outside of the connecting pipe (26), a connecting sleeve (24) threadedly fitted to the bottom of the filter sleeve (25), and a cold oil pipe (23) connected to the bottom of the connecting sleeve (24) and connected to the water cooling assembly.

8. A single-phase current-limiting explosion-proof transformer for mining according to claim 7, characterized in that, The water-cooling assembly includes a water-cooled box (01) extending underground. The water-cooled box (01) is hollow and is provided with a flow guide cavity three (43), a flow guide cavity one (41), and a flow guide cavity two (42). The bottom end of the cold oil pipe (23) is connected to the flow guide cavity three (43), the flow guide cavity one (41) is connected to the flow guide cavity two (42), the injection pipe (02) is connected to the flow guide cavity two (42), one side of the flow guide cavity three (43) is connected to multiple exchange pipes (39), and the other end of the exchange pipe (39) is connected to the flow guide cavity one (41). One side of the exchange pipe (39) is connected to an overflow pipe (40), and a pressure limiting valve is provided on the overflow pipe (40). The water-cooled box (01) is provided with multiple cooling pipes two (44).

9. A single-phase current-limiting explosion-proof transformer for mining according to claim 7, characterized in that, The explosion-proof device also includes heat sinks (03) surrounding the outer periphery of the structural box (09), with a series pipe (12) connecting two adjacent heat sinks (03), and multiple protective columns (05) fixedly connected to the top of the structural box (09).

10. A single-phase current-limiting explosion-proof transformer for mining according to claim 6, characterized in that, The support assembly includes four support columns (04) fixedly connected to the ground. Two of the support columns (04) are fixedly connected to the top of an adjustment rod (06), and the moving end of the adjustment rod (06) is rotatably connected to a solar panel (07). The other side of the solar panel (07) is in sliding contact with the two support columns (04). The bottom of the solar panel (07) is connected to an energy storage battery, which is electrically connected to a circulation pump (18) and a sensor (19) in the control assembly.

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