Explosion-proof four-phase four-column type electric reactor

Abstract

This application discloses an explosion-proof four-phase four-column reactor, belonging to the field of reactors. It includes a main body with heat dissipation fins, windings installed inside the main body, and a top cover; two symmetrical explosion-proof shells inside the main body; a circulating pump fixedly installed on the main body; and a side box located on one side of the main body. The heat dissipation fins are in two sets, respectively located on the front and rear sides of the main body. The front heat dissipation fins are connected to a main extraction pipe, which is connected to the oil inlet of the circulating pump. The beneficial effect of this application is that it provides an explosion-proof four-phase four-column reactor. Through the explosion-proof shells and baffles, in the event of a potential flash explosion risk, the two explosion-proof shells move from a first position to a second position, covering the windings to prevent flash explosion hazards and improve protective performance. Simultaneously, under normal conditions, it ensures the flow of insulating oil in all areas within the main body, preventing heat accumulation.

Description

Technical Field

[0001] This application relates to the field of reactors, and more specifically, to an explosion-proof four-phase four-column reactor. Background Technology

[0002] A reactor is a power device used to generate inductive reactance in a circuit, thereby controlling current or voltage. Its main function is to limit current fluctuations by increasing inductance, thus protecting the power system and electrical equipment. Current-limiting reactors limit the magnitude of fault currents, preventing equipment damage or larger-scale power system faults; they are typically installed between the incoming lines or busbars of substations. Voltage-regulating reactors stabilize grid voltage and prevent voltage fluctuations. Reactive power compensation reactors compensate for reactive power and maintain voltage stability. Filtering reactors filter out harmonics of specific frequencies, preventing their impact on the system. Referring to patent document CN120637015B, a four-phase four-column reactor for power electronic devices is disclosed. It is designed for applications with three-phase unbalanced loads and high voltage quality. The circuit is designed as a three-phase four-wire system. However, traditional reactors mostly rely on passive heat dissipation, with the insulating oil only relying on heat sink fins for heat dissipation. When the temperature of the insulating oil is high, it is difficult to guarantee the heat dissipation effect, thus affecting its service life and operating efficiency. At the same time, during high-power operation, not only will high temperatures be generated, but electric sparks may also occur, causing the insulating oil to vaporize instantly and generate large internal pressure, which can easily lead to danger. In addition, existing reactors use the shell for protection. When internal windings and other components explode, the shell needs to withstand large pressure. In order to ensure heat dissipation, it is difficult to set a thick explosion-proof structure in the area of ​​the shell where the heat sink fins are located. Therefore, in the event of a flash explosion, the explosion protection effect of the thinner areas of the shell is poor.

[0003] Therefore, an explosion-proof four-phase four-column reactor is needed to solve the above problems. Summary of the Invention

[0004] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0005] To address the technical problems mentioned in the background section, some embodiments of this application provide an explosion-proof four-phase four-column reactor, comprising: a main body with heat dissipation fins, windings installed inside the main body, and a top cover on the main body; characterized in that it further comprises: two symmetrical explosion-proof shells arranged inside the main body, the two explosion-proof shells having two position states; in the first position, there is a gap between the two explosion-proof shells; in the second position, the two explosion-proof shells are spliced ​​together to form a shell, and the windings are located inside the shell; a circulating pump fixedly installed on the main body, with both the oil inlet and outlet ends of the circulating pump connected to the main body; a side box arranged on one side of the main body, containing a cooling assembly and an explosion-proof assembly; wherein, there are two sets of heat dissipation fins, respectively arranged on the front and rear sides of the main body, the front heat dissipation fins being connected to a main extraction pipe, and the main extraction pipe being connected to the inlet of the circulating pump. The system includes an oil end connection, with a first branch pipe connected to the rear heat dissipation fins, which is connected to the oil outlet of the circulating pump. The cooling assembly includes: multiple sets of baffles fixed inside the main body, each set including two baffles distributed front and rear, and a flow groove on the explosion-proof housing, with the baffles corresponding to the flow groove. When the explosion-proof housing is in the first position, the baffles do not contact the explosion-proof housing, and the oil flows through the flow groove. When the explosion-proof housing is in the second position, the baffles abut against the explosion-proof housing, and the baffles close the flow groove, preventing the oil from flowing through it. A secondary extraction pipe is installed inside the main body and connected to the baffle located on the front side. An oil storage tank is installed in the side box, and the secondary extraction pipe is connected to the oil storage tank. A second branch pipe connected to the oil outlet of the circulating pump is installed on the main body, and a telescopic pipe is installed on the second branch pipe. One end of the telescopic pipe is connected to the upper end of the rear explosion-proof housing, discharging the oil between the two explosion-proof housings.

[0006] Furthermore, a temperature sensor is fixedly installed on the top cover, and a motor is fixedly installed on the main body. The temperature sensor is electrically connected to the motor, and a threaded shaft is fixedly connected to the power output end of the motor. The threaded shaft has two threaded sections with opposite directions of rotation. Connecting ears are fixedly connected to both explosion-proof shells. The threaded shaft passes through the two connecting ears respectively, and the two threaded sections on the threaded shaft are threadedly connected to the two connecting ears respectively. A return pipe is provided in the side box. One end of the main extraction pipe and the auxiliary extraction pipe are both connected to the return pipe. An oil outlet main pipe is also provided in the side box. One end of the second branch pipe and the first branch pipe are both connected to the oil outlet main pipe. The oil inlet end of the circulation pump is connected to the return pipe through a pipe, and the oil outlet end of the circulation pump is connected to the oil outlet main pipe through a pipe. An oil inlet pipe and an oil outlet pipe connected to the return pipe are connected to the oil storage tank.

[0007] Furthermore, a connecting cylinder is provided at the connection between the auxiliary extraction pipe and the return pipe. The two ends of the connecting cylinder are connected to the auxiliary extraction pipe and the return pipe, respectively. A channel is formed at the connection between the auxiliary extraction pipe and the connecting cylinder. A sealing head is slidably installed inside the connecting cylinder to block the channel. A spring is connected between the sealing head and the inner wall of the connecting cylinder. A telescopic rod with one end protruding from the connecting cylinder is fixedly connected to the sealing head. A fixing frame is fixedly connected to one end of the telescopic rod. A control component is connected to the fixing frame. The control component controls the flow path of the insulating oil.

[0008] Furthermore, the control components include: a connection box disposed on the inlet and outlet pipes, and a partition box disposed on the return pipe. The partition box is located at the midpoint of the connection between the inlet and outlet pipes on the return pipe. A partition plate inserted into the connection box is fixedly connected to a mounting bracket. The partition plate has two states: fully inserted into the connection box and about to detach from the connection box. When the partition plate is fully inserted into the connection box, it blocks the inlet and outlet pipes, preventing oil from flowing within them. When the partition plate is about to detach from the connection box, the oil flows between the return pipe, the inlet pipe, and the outlet pipe. A sliding plate with a through hole is also fixedly disposed on the mounting bracket. When the partition plate is fully inserted into the connection box, the oil flows within the return pipe. When the partition plate is about to detach from the connection box, the through hole is misaligned with the internal channel of the return pipe, preventing oil from flowing from the inlet pipe connection to the outlet pipe connection within the return pipe.

[0009] Furthermore, the explosion-proof component includes: a buffer tank fixedly installed on the oil storage tank, the buffer tank being connected to the oil storage tank, a piston slidably disposed inside the buffer tank, a piston rod fixedly connected to the piston extending out of the buffer tank, a rack fixedly connected to the piston rod, a piston tank also disposed in the side box, a threaded rod rotatably disposed inside the piston tank, a gear meshing with the rack fixedly connected to one end of the threaded rod, a piston plate slidably connected inside the piston tank, the piston plate being threadedly connected to the threaded rod, an explosion-proof agent tank installed on the piston tank, the piston tank being connected to the oil outlet main pipe via a pipeline, wherein one-way valves are provided between the explosion-proof agent tank and the piston tank, and between the piston tank and the oil outlet main pipe, and explosion-proof agent is disposed in the explosion-proof agent tank, allowing the explosion-proof agent to enter the piston tank and the oil outlet main pipe unidirectionally from the explosion-proof agent tank.

[0010] Furthermore, an elastic airbag is installed inside the buffer tank. The elastic airbag is sleeved on the outside of the piston rod. When the piston moves upward, it will compress the elastic airbag. The elastic airbag is connected to a pipe with one end connected to the inner cavity of the main body. The elastic airbag contains inert gas. A through hole is opened at the upper end of the buffer tank to maintain the air pressure balance inside and outside the buffer tank.

[0011] Furthermore, multiple driven screws are rotatably mounted on the main body. A transmission chain is connected between the driven screws and the threaded shaft, as well as between the multiple driven screws. The transmission chain enables the threaded shaft and the driven screws to rotate synchronously. The driven screws pass through connecting lugs provided on two explosion-proof shells and are threadedly connected to the two connecting lugs. The threads of the two connecting lugs rotate in opposite directions.

[0012] The beneficial effects of this application are as follows: With the addition of explosion-proof enclosures and baffles, when the temperature sensor detects a temperature value exceeding a set threshold, indicating a potential risk of flash explosion, the two explosion-proof enclosures move from a first position to a second position to enclose the windings, preventing flash explosions and improving protective performance. Simultaneously, in the normal state, in the first position, a gap exists between the two explosion-proof enclosures, allowing insulating oil to flow from the rear to the front through a flow channel, ensuring the flow of insulating oil throughout the main body and preventing heat accumulation.

[0013] With the oil storage tank in place, when the explosion-proof enclosure is in the first position, the circulating pump draws insulating oil from the lower end of the front heat dissipation fins through the main extraction pipe and discharges it to the upper end of the rear heat dissipation fins through the first branch pipe, achieving circulating cooling of the insulating oil. When the explosion-proof enclosure is in the second position, the circulating pump draws insulating oil from the winding area into the oil storage tank through the auxiliary extraction pipe, and discharges the cooled insulating oil in the oil storage tank to the winding area through the second branch pipe and the telescopic pipe for rapid cooling.

[0014] The buffer tank is designed to prevent excessive pressure inside the main body when a flash explosion occurs due to high winding temperature, causing the insulating oil to evaporate and rapidly generate a large amount of gas. Under this pressure, the sealing head moves, allowing excess oil to enter the buffer tank, thus preventing excessive pressure inside the main body. At the same time, it drives the piston and rack inside the buffer tank to move, allowing the inert gas in the elastic airbag to enter the main body and mix with the flammable gas generated by the evaporation of the insulating oil, preventing deflagration. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0016] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0017] In the attached diagram: Figure 1 This is an overall schematic diagram according to one embodiment of the present application; Figure 2 yes Figure 1 The installation diagram of the explosion-proof shell in the embodiment is shown below; Figure 3 yes Figure 1 The installation diagram of the baffle in the embodiment is shown below; Figure 4 yes Figure 1 The installation diagram of the driven screw in the embodiment is shown below; Figure 5 yes Figure 1 The embodiment is shown in the installation diagram of the oil storage tank; Figure 6 yes Figure 1 A schematic diagram of the assembly of the explosion-proof shell in the embodiment; Figure 7 yes Figure 1 A schematic diagram of the connecting cylinder in the embodiment; Figure 8 yes Figure 1 A schematic diagram of the piston tank in the embodiment; Figure 9 yes Figure 1 The installation diagram of the telescopic tube in the embodiment is shown below. Figure 10 yes Figure 1 The diagram shows the direction of insulating oil flow when the explosion-proof shell is in the second position in the embodiment. Figure 11 yes Figure 1 The diagram shows the direction of insulating oil flow when the explosion-proof shell is in the first position in the embodiment. Figure label:

[0018] 10. Main body; 11. Top cover; 12. Heat dissipation fins; 13. Side box; 14. Circulation pump; 15. Explosion-proof shell; 16. Flow channel; 17. Winding; 18. Baffle; 19. Motor; 20. Threaded shaft; 21. Connecting lug; 22. Main extraction pipe; 23. Driven screw; 24. First branch pipe; 25. Second branch pipe; 26. Auxiliary extraction pipe; 27. Telescopic pipe; 28. Oil storage tank; 29. ​​Return pipe; 30. Main oil outlet pipe; 31. Connecting... 31. Connecting sleeve; 32. Sealing head; 33. Spring; 34. Telescopic rod; 35. Fixing frame; 36. Partition plate; 37. Connecting box; 38. Oil inlet pipe; 39. Oil outlet pipe; 40. Partition box; 41. Sliding plate; 42. Buffer tank; 43. Piston rod; 44. Rack; 45. Gear; 46. Piston can; 47. Explosion-proof agent can; 48. Threaded rod; 49. Piston plate; 50. Drive chain; 51. Elastic airbag; 52. Temperature sensor. Detailed Implementation

[0019] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0020] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0021] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0022] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0023] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] Reference Figure 1-11 An explosion-proof four-phase four-column reactor includes: a main body 10, with heat dissipation fins on both the front and rear sides of the main body 10. The heat dissipation fins are hollow, and insulating oil is disposed inside the main body 10. A top cover 11 is located at the upper end of the main body 10, and a temperature sensor 52 is installed on the top cover 11 to detect the temperature of the insulating oil inside the main body 10. A circulation pump 14 is also fixedly installed on the main body 10. A main extraction pipe 22 is connected to the lower end of the heat dissipation fins 12 on the front side of the main body 10, and a first branch pipe 24 is connected to the upper end of the heat dissipation fins 12 on the rear side. The main extraction pipe 22 is connected to the oil inlet of the circulation pump 14, and the first branch pipe 24 is connected to the oil outlet of the circulation pump 14. A winding 17 is fixedly installed inside the main body 10. The circulating pump 14 causes the insulating oil inside the main body 10 to circulate from back to front and from top to bottom, cooling the winding 17. During this process, the insulating oil dissipates heat through the heat dissipation fins 12. A side box 13 is provided on the right side of the main body 10.

[0025] In one embodiment, two explosion-proof housings 15 arranged front to back are slidably disposed on the main body 10. The two explosion-proof housings 15 have two positional states: in the first position, there is a gap between the two housings 15; in the second position, the two housings 15 are joined together to form a shell, with the winding 17 located inside the shell and covered by the explosion-proof housings 15. A motor 19 is fixedly mounted on the main body 10, and a temperature sensor 52 is electrically connected to the motor 19. When the temperature sensor 52 detects that the temperature value is higher than a set threshold, indicating a potential risk of flash explosion, it controls the motor 19 to output power. A threaded shaft 20 is fixedly connected to the power output end of the motor 19. Three driven screws 23 are also rotatably disposed on the main body 10. A transmission chain 50 is connected between the driven screws 23 and the threaded shaft 20, and between the driven screws 23 and the threaded shaft 20, enabling the threaded shaft 20 and the driven screws 23 to rotate synchronously. The threaded shaft 20 has two threaded sections with opposite directions of rotation. Connecting lugs 21 are fixedly connected to both explosion-proof housings 15. The threaded shaft 20 passes through the two connecting lugs 21, and the two threaded sections on the threaded shaft 20 are threadedly connected to the two connecting lugs 21. The driven screw 23 also has two threaded sections with opposite directions of rotation. The driven screw 23 passes through the connecting lugs 21 on the two explosion-proof housings 15 and is threadedly connected to the two connecting lugs 21, with the threads of the two connecting lugs 21 having opposite directions of rotation. This ensures that when the motor 19 outputs power to rotate the threaded shaft 20, the driven screw 23 rotates through the transmission chain 50, thereby moving the two explosion-proof housings 15 from the first position to the second position, covering the winding 17 to prevent flash explosions and improve protective performance. Similarly, when the temperature sensor 52 continues to detect a temperature below a threshold, it controls the motor 19 to output power in the opposite direction, causing the explosion-proof housing 15 to return to the first position. The configuration of the temperature sensor 52 and the motor 19 is existing technology.

[0026] In one embodiment, multiple sets of baffles 18 are fixed inside the main body 10. Each set of baffles 18 includes two baffles distributed front to back. A flow channel 16 is provided on the explosion-proof housing 15, and the baffles 18 correspond to the flow channel 16. When the explosion-proof housing 15 is in the first position, the baffles 18 do not contact the explosion-proof housing 15, and the oil flows through the flow channel 16. When the explosion-proof housing 15 is in the second position, the baffles 18 abut against the explosion-proof housing 15, and the baffles 18 close the flow channel 16, so the oil no longer flows through the flow channel 16.

[0027] When the explosion-proof housing 15 is in the first position, the insulating oil flows from the rear to the front through the flow channel 16, ensuring the flow of insulating oil in all areas of the main body 10 and preventing heat accumulation. During high-power operation, the winding 17 generates significant heat, and if the heat dissipation fins 12 fail to cool the insulating oil in time, excessive temperature may lead to a flash explosion hazard. In this case, the explosion-proof housing 15 is in the second position, protecting the winding 17 while reducing the space occupied by it. The circulating pump 14 mixes the insulating oil inside the explosion-proof housing 15 with the externally cooled insulating oil, rapidly cooling the area where the winding 17 is located. Furthermore, due to the reduced space occupied by the winding 17, the flow rate of the insulating oil inside the housing (i.e., the space where the winding 17 is located) increases under the same power output of the circulating pump 14, further improving the heat dissipation effect. The insulating oil in other positions is cooled by the heat dissipation fins 12.

[0028] When the two explosion-proof shells 15 are in the second position, they will divide the inner cavity of the main body 10 into two areas, front and back.

[0029] In the above embodiment, an oil storage tank 28 is fixedly installed inside the side box 13. The oil storage tank 28 stores insulating oil in a cooled state. It should be noted that heat dissipation fins are provided on the oil storage tank 28. When the explosion-proof shell 15 is in the second position, rapid cooling is achieved by mixing the cooled insulating oil in the oil storage tank 28 with the insulating oil in the area where the winding 17 is located. Specifically, a return pipe 29 is provided inside the side box 13. One end of the main extraction pipe 22 and the auxiliary extraction pipe 26 are both connected to the return pipe 29. An oil outlet main pipe 30 is also provided inside the side box 13. One end of the second branch pipe 25 and the first branch pipe 24 are both connected to the oil outlet main pipe 30. The oil inlet end of the circulation pump 14 is connected to the return pipe 29 through a pipe, and the oil outlet end of the circulation pump 14 is connected to the oil outlet main pipe 30 through a pipe. An oil inlet pipe 38 and an oil outlet pipe 39 connected to the return pipe 29 are connected to the oil storage tank 28. When the explosion-proof housing 15 is in the first position, the circulating pump 14 draws insulating oil from the lower end of the front heat dissipation fins 12 through the main extraction pipe 22 and discharges it to the upper end of the rear heat dissipation fins 12 through the first branch pipe 24, thereby achieving circulating cooling of the insulating oil. When the explosion-proof housing 15 is in the second position, the circulating pump 14 draws insulating oil from the area where the winding 17 is located through the auxiliary extraction pipe 26 into the oil storage tank 28, and discharges the cooled insulating oil in the oil storage tank 28 into the area where the winding 17 is located through the second branch pipe 25 and the telescopic pipe 27 for rapid cooling.

[0030] In the above embodiment, a connecting cylinder 31 is provided at the connection between the auxiliary extraction pipe 26 and the return pipe 29. Both ends of the connecting cylinder 31 are connected to the auxiliary extraction pipe 26 and the return pipe 29 respectively, forming a channel at the connection between the auxiliary extraction pipe 26 and the connecting cylinder 31. A sealing head 32 for sealing the channel is slidably disposed inside the connecting cylinder 31, and a spring 33 is connected between the sealing head 32 and the inner wall of the connecting cylinder 31. A telescopic rod 34, with one end extending out of the connecting cylinder 31, is fixedly connected to the sealing head 32. A fixing frame 35 is fixedly connected to one end of the telescopic rod 34, and a control component is connected to the fixing frame 35. The control component controls the flow path of the insulating oil.

[0031] The control components include: a connection box 37 disposed on the oil inlet pipe 38 and the oil outlet pipe 39, and a partition box 40 disposed on the return pipe 29. The partition box 40 is located at the midpoint of the connection between the oil inlet pipe 38 and the oil outlet pipe 39 on the return pipe 29. A partition plate 36 is fixedly connected to the mounting bracket 35 and inserted into the connection box 37. The partition plate 36 has two states: fully inserted into the connection box 37 and about to detach from the connection box 37. When the partition plate 36 is fully inserted into the connection box 37, it blocks the oil inlet pipe 38 and the oil outlet pipe 39, and the oil does not flow in the oil inlet pipe 38 and the oil outlet pipe 39. When the partition plate 36 is about to detach from the connection box 37, the oil flows between the return pipe 29, the oil inlet pipe 38, and the oil outlet pipe 39. A sliding plate 41 is also fixedly installed on the fixed bracket 35. The sliding plate 41 has a through hole. When the partition plate 36 is fully inserted into the connecting box 37, the oil flows in the return pipe 29. When the partition plate 36 is about to detach from the connecting box 37, the through hole is misaligned with the internal channel of the return pipe 29, so that the oil will not flow from the oil inlet pipe 38 connection to the oil outlet pipe 39 connection in the return pipe 29. When the two explosion-proof housings 15 are in the second position, the hydraulic oil can no longer flow through the flow channel 16, and the insulating oil on the front and rear sides of the inner cavity of the main body 10 can no longer flow. At this time, the circulating pump 14 continuously outputs power, which causes the sealing head 32 to move and compress the spring 33, so that the auxiliary extraction pipe 26 extracts the insulating oil on the lower front side of the area where the winding 17 is located and passes it into the oil tank 28 through the oil pipe 38. Then, the insulating oil in the oil tank 28 is drawn to the oil outlet main pipe 30 through the oil outlet pipe 39 and discharged to the upper rear side of the area where the winding 17 is located through the first branch pipe 24 and the telescopic pipe 27, so as to realize the flow of insulating oil in the area where the winding 17 is located, so that the cooling insulating oil in the oil tank 28 mixes with the high-temperature insulating oil in the area where the winding 17 is located, and is quickly cooled.

[0032] It should be noted that the spring 33 has two parts. The sealing head 32 slides in the first part. When the connecting cylinder 31 slides to the end of the first part, it enters the second part. The cross-sectional area of ​​the second part is larger than that of the first part. At this time, the connecting cylinder 31 no longer blocks the oil, allowing the oil to enter the return pipe 29 through the second part. When the connecting cylinder 31 moves to the end of the first part, the partition plate 36 no longer blocks the oil inlet pipe 38 and the oil outlet pipe 39. At the same time, the sliding plate 41 blocks the return pipe 29, so that the oil path is from the return pipe 29 through the oil inlet pipe 38 into the oil storage tank 28, and then back to the return pipe 29 through the oil outlet pipe 39. The insulating oil in the oil storage tank 28 participates in the circulation cooling.

[0033] An elastic airbag 51 is provided inside the buffer tank 42. The elastic airbag 51 is sleeved on the outside of the piston rod 43. When the piston moves upward, it will squeeze the elastic airbag 51. The elastic airbag 51 is connected to a pipe with one end connected to the inner cavity of the main body 10. The elastic airbag 51 contains inert gas. A through hole is provided at the upper end of the buffer tank 42 to maintain the air pressure balance inside and outside the buffer tank 42.

[0034] When a flash explosion occurs at high temperature in winding 17, causing the insulating oil to evaporate and rapidly generate a large amount of gas, the pressure inside the main body 10 will suddenly increase. Under this pressure, the sealing head 32 will also move, allowing excess oil to enter the buffer tank 42 to prevent excessive pressure inside the main body 10. Simultaneously, this will drive the piston and rack 44 inside the buffer tank 42 to move, allowing the inert gas in the elastic airbag 51 to enter the main body 10 and mix with the flammable gas generated by the evaporation of the insulating oil, preventing deflagration. At the same time, the movement of the piston rod 43 drives the rack 44, causing the threaded rod 48 to rotate and drive the piston plate 49 to move, discharging the explosion-proof agent from the piston tank 46 into the oil outlet pipe 30. This agent then enters the area where winding 17 is located along with the insulating oil, preventing deflagration of the insulating oil. The explosion-proof agent is methyl silicone oil, which is chemically inert and does not react with the insulating oil or the aforementioned inert gas. It also has excellent high-temperature resistance and can form a stable protective film on the surface of oil droplets, further blocking the explosion conditions by inhibiting oil and gas evaporation. It should be noted that the elastic airbag 51 is also connected to a hose that connects to the air tank. By pressing the elastic airbag 51, inert gas is delivered through the pipe into the main body 10, which can be referred to as the breathing airbag in existing products.

[0035] Work or installation process: 1. When the temperature sensor 52 detects a temperature value higher than a set threshold, indicating a potential risk of flash explosion, it controls the motor 19 to output power. The power output end of the motor 19 is fixedly connected to a threaded shaft 20. Three driven screws 23 are rotatably mounted on the main body 10. A transmission chain 50 connects the driven screws 23 to the threaded shaft 20 and to all driven screws 23, enabling the threaded shaft 20 and driven screws 23 to rotate synchronously. The threaded shaft 20 has two threaded sections with opposite directions of rotation. Connecting lugs 21 are fixedly connected to both explosion-proof housings 15. The threaded shaft 20 passes through the two connecting lugs 21, and the two threaded sections on the threaded shaft 20 are threadedly connected to the two connecting lugs 21. Similarly, the driven screws 23 also have two threaded sections with opposite directions of rotation. The driven screws 23 pass through the connecting lugs 21 on the two explosion-proof housings 15 and are threadedly connected to the two connecting lugs 21, with the threads of the two connecting lugs 21 having opposite directions of rotation. When the motor 19 outputs power to drive the threaded shaft 20 to rotate, the driven screw 23 will rotate through the transmission chain 50, thereby driving the two explosion-proof housings 15 from the first position to the second position to cover the winding 17 and prevent flash explosion from causing danger. Similarly, after the cooling is completed, when the temperature sensor 52 detects that the temperature is below the threshold, it controls the motor 19 to output power in the opposite direction, so that the explosion-proof housings 15 return to the first position.

[0036] 2. When the explosion-proof housing 15 is in the first position, the insulating oil flows from the rear to the front through the flow channel 16, ensuring the flow of insulating oil in all areas within the main body 10 and preventing heat accumulation. During high-power operation, the winding 17 generates significant heat, and if the heat dissipation fins 12 fail to cool the insulating oil in time, excessive temperature may lead to a flash explosion hazard. In this case, the explosion-proof housing 15 is in the second position, protecting the winding 17 while reducing the space occupied by it. The circulating pump 14 mixes the insulating oil inside the explosion-proof housing 15 with the externally cooled insulating oil, rapidly cooling the area where the winding 17 is located. Furthermore, due to the reduced space for the winding 17, under the same power output of the circulating pump 14, the flow rate of the insulating oil inside the housing formed by the explosion-proof housing 15 (i.e., the space where the winding 17 is located) increases, further improving the heat dissipation effect. The insulating oil in other positions is cooled by the heat dissipation fins 12.

[0037] 3. When a flash explosion occurs at high temperature in winding 17, causing the insulating oil to evaporate and rapidly generate a large amount of gas, the pressure inside the main body 10 will suddenly increase. Under this pressure, the sealing head 32 will also move, allowing excess oil to enter the buffer tank 42 to prevent excessive pressure inside the main body 10. Simultaneously, this will drive the piston and rack 44 inside the buffer tank 42 to move, allowing the inert gas in the elastic airbag 51 to enter the main body 10 and mix with the flammable gas generated by the evaporation of the insulating oil, preventing deflagration. At the same time, the movement of the piston rod 43 drives the rack 44 to move, causing the threaded rod 48 to rotate and drive the piston plate 49 to move, discharging the explosion-proof agent from the piston tank 46 into the oil outlet pipe 30. This agent then enters the area where winding 17 is located along with the insulating oil, preventing deflagration of the insulating oil. The explosion-proof agent is methyl silicone oil, which is chemically inert and does not react with the insulating oil or the aforementioned inert gas. It also has excellent high-temperature resistance and can form a stable protective film on the surface of oil droplets, further blocking the explosion conditions by inhibiting oil and gas evaporation.

[0038] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. An explosion-proof four-phase four-limb reactor, comprising: The main body (10) is provided with heat dissipation fins (12), the winding (17) is installed inside the main body (10), and the main body (10) is provided with a top cover (11). Its characteristics are: Also includes: The explosion-proof housing (15) has two symmetrically arranged inside the main body (10). The two explosion-proof housings (15) have two position states. In the first position, there is a gap between the two explosion-proof housings (15). In the second position, the two explosion-proof housings (15) are spliced ​​together to form a housing, and the winding (17) is located inside the housing. The circulating pump (14) is fixedly installed on the main body (10), and both the oil inlet and outlet of the circulating pump (14) are connected to the main body (10). A side box (13) is located on one side of the main body (10), and a cooling component and an explosion-proof component are installed inside the side box (13); Among them, the heat dissipation fins (12) have two sets, which are respectively arranged on the front and rear sides of the main body (10). The heat dissipation fins (12) on the front side are connected to the main extraction pipe (22), which is connected to the oil inlet end of the circulation pump (14). The heat dissipation fins (12) on the rear side are connected to the first branch pipe (24), which is connected to the oil outlet end of the circulation pump (14). The cooling components include: Multiple sets of baffles (18) are fixed inside the main body (10). Each set of baffles (18) includes two baffles (18) distributed front and rear. A flow channel (16) is provided on the explosion-proof shell (15), and the baffles (18) correspond to the flow channel (16). When the explosion-proof shell (15) is in the first position, the baffles (18) do not contact the explosion-proof shell (15), and the oil flows through the flow channel (16). When the explosion-proof shell (15) is in the second position, the baffles (18) abut against the explosion-proof shell (15), and the baffles (18) close the flow channel (16), and the oil no longer flows through the flow channel (16). A secondary extraction pipe (26) is provided inside the main body (10). The secondary extraction pipe (26) is connected to the baffle (18) located on the front side. An oil storage tank (28) is provided inside the side box (13). The secondary extraction pipe (26) is connected to the oil storage tank (28). A second branch pipe (25) connected to the oil outlet of the circulating pump (14) is installed on the main body (10). A telescopic pipe (27) is provided on the second branch pipe (25). One end of the telescopic pipe (27) is connected to the upper end of the explosion-proof shell (15) on the rear side and discharges the oil between the two explosion-proof shells (15).

2. The explosion-proof four-phase four-column reactor according to claim 1, characterized in that: A temperature sensor (52) is fixedly installed on the top cover (11), and a motor (19) is fixedly installed on the main body (10). The temperature sensor (52) is electrically connected to the motor (19). A threaded shaft (20) is fixedly connected to the power output end of the motor (19). The threaded shaft (20) has two threaded sections with opposite directions of rotation. Connecting ears (21) are fixedly connected to both explosion-proof shells (15). The threaded shaft (20) passes through the two connecting ears (21) respectively. The two threaded sections on the threaded shaft (20) are threadedly connected to the two connecting ears (21) respectively. In the side box ( 13) A return pipe (29) is provided inside. One end of the main extraction pipe (22) and the auxiliary extraction pipe (26) are connected to the return pipe (29). An oil outlet main pipe (30) is also provided inside the side box (13). One end of the second branch pipe (25) and the first branch pipe (24) are connected to the oil outlet main pipe (30). The oil inlet end of the circulation pump (14) is connected to the return pipe (29) through a pipe. The oil outlet end of the circulation pump (14) is connected to the oil outlet main pipe (30) through a pipe. An oil inlet pipe (38) and an oil outlet pipe (39) connected to the return pipe (29) are connected to the oil storage tank (28).

3. The explosion-proof four-phase four-column reactor according to claim 2, characterized in that: A connecting cylinder (31) is provided at the connection between the auxiliary extraction pipe (26) and the return pipe (29). The two ends of the connecting cylinder (31) are respectively connected to the auxiliary extraction pipe (26) and the return pipe (29). A channel is formed at the connection between the auxiliary extraction pipe (26) and the connecting cylinder (31). A sealing head (32) for sealing the channel is slidably provided inside the connecting cylinder (31). A spring (33) is connected between the sealing head (32) and the inner wall of the connecting cylinder (31). A telescopic rod (34) with one end protruding from the connecting cylinder (31) is fixedly connected to the sealing head (32). A fixing frame (35) is fixedly connected to one end of the telescopic rod (34). A control component is connected to the fixing frame (35). The control component controls the flow path of the insulating oil.

4. The explosion-proof four-phase four-column reactor according to claim 3, characterized in that: The control component includes: a connecting box (37) disposed on the oil inlet pipe (38) and the oil outlet pipe (39); a partition box (40) disposed on the return pipe (29); the partition box (40) is located at the middle position of the connection between the oil inlet pipe (38) and the oil outlet pipe (39) on the return pipe (29); a partition piece (36) is fixedly connected to the fixing bracket (35) and inserted into the connecting box (37); the partition piece (36) has two states: fully inserted into the connecting box (37) and about to detach from the connecting box (37); when the partition piece (36) is fully inserted into the connecting box (37), the oil inlet pipe (38) and the oil outlet pipe (39) are controlled. When the block is closed, the oil does not flow in the inlet pipe (38) and outlet pipe (39); when the partition plate (36) is about to detach from the connecting box (37), the oil flows between the return pipe (29), the inlet pipe (38) and the outlet pipe (39); a sliding plate (41) is also fixedly installed on the fixed bracket (35). The sliding plate (41) has a through hole. When the partition plate (36) is fully inserted into the connecting box (37), the oil flows in the return pipe (29); when the partition plate (36) is about to detach from the connecting box (37), the through hole is misaligned with the internal channel of the return pipe (29), so that the oil will not flow from the connection of the inlet pipe (38) to the connection of the outlet pipe (39) in the return pipe (29).

5. The explosion-proof four-phase four-column reactor according to claim 4, characterized in that: The explosion-proof component includes: A buffer tank (42) is fixedly installed on the oil storage tank (28). The buffer tank (42) is connected to the oil storage tank (28). A piston is slidably arranged inside the buffer tank (42). A piston rod (43) extending out of the buffer tank (42) is fixedly connected to the piston. A rack (44) is fixedly connected to the piston rod (43). A piston tank (46) is also arranged in the side box (13). A threaded rod (48) is rotatably arranged inside the piston tank (46). A gear (45) meshing with the rack (44) is fixedly connected to one end of the threaded rod (48). A piston plate (49) is slidably connected inside the piston tank (46), and the piston plate (49) is threadedly connected to the threaded rod (48). An explosion-proof agent tank (47) is installed on the piston tank (46). The piston tank (46) is connected to the oil outlet main pipe (30) through a pipeline. One-way valves are provided between the explosion-proof agent tank (47) and the piston tank (46) and between the piston tank (46) and the oil outlet main pipe (30). An explosion-proof agent is provided in the explosion-proof agent tank (47), so that the explosion-proof agent enters the piston tank (46) and the oil outlet main pipe (30) in one direction from the explosion-proof agent tank (47).

6. The explosion-proof four-phase four-column reactor according to claim 5, characterized in that: An elastic airbag (51) is provided inside the buffer tank (42). The elastic airbag (51) is sleeved on the outside of the piston rod (43). When the piston moves upward, it will squeeze the elastic airbag (51). The elastic airbag (51) is connected to a pipe with one end connected to the inner cavity of the main body (10). The elastic airbag (51) contains inert gas. A through hole is opened at the upper end of the buffer tank (42) to maintain the air pressure balance inside and outside the buffer tank (42).

7. An explosion-proof four-phase four-column reactor according to claim 6, characterized in that: Multiple driven screws (23) are rotatably mounted on the main body (10). A transmission chain (50) is connected between the driven screws (23), the threaded shaft (20), and the multiple driven screws (23). The transmission chain (50) enables the threaded shaft (20) and the driven screws (23) to rotate synchronously. The driven screws (23) pass through the connecting ears (21) provided on the two explosion-proof shells (15) and are threadedly connected to the two connecting ears (21). The threads of the two connecting ears (21) are in opposite directions.

Images