An explosion-proof oil-immersed transformer

Abstract

The application relates to the technical field of transformers, in particular to an explosion-proof oil-immersed transformer which comprises a device main body, a cooler is arranged in the device main body, a winding is arranged in the device main body, a plurality of insulators are arranged on the winding, an explosion-proof box is arranged on the side wall of the device main body, a main pipe is arranged on the device main body in communication, and a suction pump is arranged on the main pipe. When the device normally operates, the basic heat dissipation cycle composed of the main pipe, a spiral pipe and heat conduction fins can realize continuous cooling of insulating oil, and the stable work of the winding is guaranteed. When the temperature and pressure of the winding are unbalanced due to overload, the high-temperature oil liquid in the device main body can be quickly sucked and pressure-released, explosion in the device main body caused by pressure imbalance is prevented, the pre-cooling heat exchange fins are quickly intervened to strengthen cooling when the high-temperature oil liquid is discharged and flows, inert gas is synchronously released to block the explosion condition, and explosion of the device main body is avoided.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, specifically to an explosion-proof oil-immersed transformer. Background Technology

[0002] Oil-immersed electrical equipment is widely used in power transmission, industrial control and other fields due to its excellent insulation performance and stable heat dissipation. Its core operational reliability directly depends on the heat dissipation efficiency of the internal windings and the safety status of the insulating oil.

[0003] During operation, the windings continuously generate Joule heat. This heat is rapidly transferred to the insulating oil immersing the windings. If it cannot be dissipated in time, the oil temperature will continue to rise. This process not only significantly degrades the insulating properties of the insulating oil but may also cause oil vaporization, directly leading to abnormal pressure fluctuations inside the equipment. Currently, explosion-proof measures inside oil-immersed transformers are generally quite simple. When the transformer's internal oil generates a large amount of oil vapor due to high temperature, resulting in pressure imbalance, its cooling and explosion-proof measures mostly rely on a single circulation system. This involves an oil pump driving the insulating oil through a heat dissipation structure to exchange heat, thus achieving the dual purpose of cooling and explosion-proof. However, in actual operating scenarios, when severe faults such as short circuits or arc discharges occur in the winding equipment, the insulating oil will vaporize instantly, causing a sharp increase in internal pressure. At this time, the limitations of traditional cooling and explosion-proof measures become particularly prominent. Not only is their pressure relief efficiency unable to match the rate of pressure surge, making it impossible to effectively control the spread of explosion risk in a short time, but they also cannot provide appropriate explosion-proof treatment for the high-temperature oil during circulation, posing a serious threat to the safety of equipment operation. Summary of the Invention

[0004] The purpose of this invention is to provide an explosion-proof oil-immersed transformer to solve the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an explosion-proof oil-immersed transformer, comprising a main body, a cooler disposed inside the main body, windings installed inside the main body, multiple insulators disposed on the windings, an explosion-proof box disposed on the side wall of the main body, a main pipe connected to the main body, a suction pump disposed on the main pipe, one end of the main pipe away from the main body connected to the interior of the explosion-proof box, a flow box connected to the end of the main pipe, a branch pipe connected to the flow box, a circulation diversion cooling mechanism disposed on the branch pipe, an explosion-proof cavity disposed on the main pipe, a storage box fixedly connected to the outer wall of the explosion-proof cavity, an explosion-proof pressure relief mechanism disposed on the storage box, the explosion-proof pressure relief mechanism comprising a gas cavity, an air cavity, and a bottom cavity opened inside the storage box, and a sliding rod slidably connected to the gas cavity, air cavity, explosion-proof cavity, and bottom cavity.

[0006] Preferably, the slide rod has an air inlet, a rotating rod is rotatably connected through the slide rod, a water wheel is fixedly connected to the lower end of the rotating rod, a magnetic strip is fixedly connected to the bottom of the rotating rod, a return spring is sleeved on the outer wall of the slide rod, a cam is fixedly connected to the end of the rotating rod inside the slide rod, a moving tube is slidably connected through the slide rod, the end of the moving tube outside the slide rod is sealed, an inner hole is opened in the moving tube, and a pressing spring is sleeved on the moving tube.

[0007] Preferably, the circulating diversion cooling mechanism includes an inner ring fixedly connected inside the branch pipe, a transmission rod rotatably connected through the inner ring, a valve plate fixedly connected to the transmission rod, and gears and bevel gears fixedly connected to the two sides of the transmission rod located outside the branch pipe, respectively.

[0008] Preferably, a threaded rod is rotatably connected to the outer wall of the branch pipe, and a driven wheel is fixedly connected to the end of the threaded rod. The driven wheel is meshed with a bevel gear. A baffle is slidably connected through the inside of the flow box, and the end of the baffle is threaded onto the outer wall of the threaded rod.

[0009] Preferably, the side wall of the explosion-proof cavity is slidably connected with heat exchange fins, a tension spring is fixedly connected to the heat exchange fins, the other end of the tension spring is fixedly connected to the outer side wall of the explosion-proof cavity, a scraper corresponding to the heat exchange fins is provided inside the explosion-proof cavity, and a magnetic block is fixedly connected to the heat exchange fins.

[0010] Preferably, a drive plate is fixedly connected to the outer wall of the heat exchange fins, a cooling box is provided covering the outside of the heat exchange fins, a cooler is provided inside the cooling box, and a sliding groove corresponding to the drive plate is provided at the bottom of the cooling box.

[0011] Preferably, a limiting member is fixedly connected to the gear, the limiting member is in contact with the end of the drive plate, a vertical plate is fixedly connected to the branch pipe, a telescopic rod is provided on the vertical plate, a rack is fixedly connected to the end of the telescopic rod, and the rack is meshed with the gear.

[0012] Preferably, a disc is connected to the bottom of the flow box, a spiral tube is connected to the disc, heat-conducting fins are provided on the spiral tube, a flow pipe is connected to the bottom of the spiral tube, and the end of the flow pipe away from the disc is connected to the interior of the main body of the device.

[0013] Preferably, an oil storage tank is connected to the end of the branch pipe away from the flow box, an oil drain pipe is connected to the oil storage tank, an oil filling pipe is connected between the oil storage tank and the main body of the equipment, and a pressure device is installed inside the main body of the equipment.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. During normal operation, the basic heat dissipation cycle consisting of the main pipe, spiral tube, and heat-conducting fins continuously cools the insulating oil, ensuring stable winding operation. When the winding is overloaded and causes temperature and pressure imbalance, the high-temperature oil inside the equipment body is quickly pumped out and depressurized to prevent an explosion caused by pressure imbalance inside the equipment body. When the high-temperature oil is discharged and flows, the pre-cooling heat exchange fins quickly intervene to enhance cooling and simultaneously release inert gas to block the conditions for explosion, thus preventing the equipment body from exploding.

[0016] 2. Through the setting of mechanisms such as the rotating rod, when encountering severe faults such as short circuits and arc discharges, high-power extraction and explosion-proof agents are superimposed on the above mechanism to form multiple protections. This layered design allows the equipment to accurately match the protection requirements of different fault levels, solving the problem that traditional heat dissipation and explosion-proof mechanisms have a single function and cannot perform explosion-proof treatment on circulating insulating oil, and greatly improving the safety redundancy of the operating cycle. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0019] Figure 3 This is a schematic diagram of the internal structure of the explosion-proof box of the present invention;

[0020] Figure 4 This is a partial structural diagram of the present invention;

[0021] Figure 5 for Figure 4 Enlarged view of A in the middle;

[0022] Figure 6 This is a schematic diagram of the internal structure of the storage box of the present invention;

[0023] Figure 7 This is a schematic diagram of the rear structure of the cooling box of the present invention;

[0024] Figure 8 This is a schematic diagram of the heat exchange fin structure of the present invention;

[0025] Figure 9 This is a schematic diagram of the internal structure of the slide bar of the present invention. Figure 1 ;

[0026] Figure 10 This is a schematic diagram of the internal structure of the slide bar of the present invention. Figure 2 ;

[0027] Figure 11This is a schematic diagram of the explosion-proof box structure of the present invention.

[0028] In the attached diagram, the components represented by each number are as follows:

[0029] 1. Main body of the equipment; 2. Winding; 3. Explosion-proof box; 4. Oil storage tank; 5. Oil drain pipe; 6. Flow pipe; 7. Spiral pipe; 8. Transmission rod; 9. Branch pipe; 10. Main pipe; 11. Disc; 12. Flow box; 13. Explosion-proof cavity; 14. Inner ring; 15. Valve plate; 16. Bevel gear; 17. Threaded rod; 18. Baffle; 19. Gear; 20. Vertical plate; 21. Telescopic rod; 22. Rack; 23. Storage box; 24. Gas chamber; 25. Cavity; 26. Bottom cavity; 27. Air inlet; 28. Return spring; 29. ​​Slide rod; 30. Limiting component; 31. Drive plate; 32. Scraper; 33. Cooling box; 34. Heat exchange fins; 35. Tension spring; 36. Magnetic block; 37. Water wheel; 38. Rotating rod; 39. Cam; 40. Moving pipe; 41. Inner hole; 42. Magnetic strip; 43. Oil filling pipe; 44. Pressure device; 45. Driven wheel. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1: Please refer to Figure 1 - Figure 11 An explosion-proof oil-immersed transformer includes a main body 1, a cooler inside the main body 1, a winding 2 installed inside the main body 1, multiple insulators on the winding 2, an explosion-proof box 3 installed on the side wall of the main body 1, a main pipe 10 connected to the main body 1, a suction pump installed on the main pipe 10, the end of the main pipe 10 away from the main body 1 connected to the interior of the explosion-proof box 3, a flow box 12 connected to the end of the main pipe 10, a branch pipe 9 connected to the flow box 12, and a circulating shunt cooling mechanism installed on the branch pipe 9. An explosion-proof chamber 13 is provided on the pipe 10. A storage box 23 is fixedly connected to the outer wall of the explosion-proof chamber 13. An explosion-proof pressure relief mechanism is provided on the storage box 23. The explosion-proof pressure relief mechanism includes a gas chamber 24, an air chamber 25 and a bottom chamber 26 opened inside the storage box 23. A slide rod 29 is slidably connected to the gas chamber 24, the air chamber 25, the explosion-proof chamber 13 and the bottom chamber 26. An air inlet 27 is opened on the slide rod 29. A rotating rod 38 is rotatably connected through the inside of the slide rod 29. A water wheel 37 is fixedly connected to the lower end of the rotating rod 38. A magnetic strip 42 is fixedly connected to the bottom of the rotating rod 38.

[0032] A return spring 28 is sleeved on the outer wall of the slide rod 29. A cam 39 is fixedly connected to one end of the rotating rod 38 located inside the slide rod 29. A moving tube 40 is slidably connected through the slide rod 29. The end of the moving tube 40 located outside the slide rod 29 is sealed. An inner hole 41 is opened on the moving tube 40. A pressing spring is sleeved on the moving tube 40.

[0033] In this embodiment, the winding 2 installed inside the main body 1 continuously releases heat when energized. The heat is quickly transferred to the insulating oil immersing the winding 2. The multiple insulators installed on the winding 2 ensure the electrical insulation performance in the oil immersion environment and prevent insulation failure caused by oil flow disturbance. As the temperature of the insulating oil rises, the main pipe 10 connected to the main body 1 starts the suction pump to generate power and pump the insulating oil in the main body 1 along the main pipe 10 to the explosion-proof box 3 installed on the side wall, completing the initial heat transfer. After entering the explosion-proof box 3, the insulating oil first flows into the flow box 12 connected to the end of the main pipe 10. The flow box 12 acts as the oil flow distribution center. Through the disc 11 connected to the bottom, some hot oil is introduced into the spiral tube 7. The heat-conducting fins on the outer wall of the spiral tube 7 form an efficient heat exchange with the external cooling box 33. After the heat is dissipated by the heat-conducting fins, the cooled insulating oil flows back to the main body 1 through the flow pipe 6, forming a basic heat dissipation cycle, thereby ensuring the cooling effect of the insulating oil on the winding 2.

[0034] During equipment operation, when winding 2 experiences temperature imbalance due to overload, the high temperature can cause a small amount of insulating oil inside the main body 1 to vaporize, leading to an abnormal increase in pressure inside the main body 1 and posing an explosion risk. At this time, pressure sensor 44 can detect the pressure imbalance signal inside the main body 1 in real time and then sends an electrical signal to drive the telescopic rod 21 to retract. When the telescopic rod 21 retracts, it drives the rack 22 to move closer to the vertical plate 20. This part is existing technology and will not be elaborated here. As the rack 22 moves... As the vertical plate 20 moves, the gear 19, which meshes with the rack 22, rotates synchronously, causing the limiting member 30 to rotate 90 degrees toward the vertical plate 20, thus releasing the limiting member 30 from obstructing the drive plate 31. At the same time, the heat exchange fins 34 are quickly inserted into the explosion-proof cavity 13 under the tension of the tension spring 35. Since the heat exchange fins 34 have been pre-cooled by the cooling box 33, they can quickly cool the high-temperature insulating oil flowing through the cavity after being inserted into the explosion-proof cavity 13, thus achieving preliminary temperature control of the insulating oil.

[0035] Example 2: Please refer to Figure 1 - Figure 11 The circulating diversion cooling mechanism includes an inner ring 14 fixedly connected inside the branch pipe 9, a transmission rod 8 rotatably connected through the inner ring 14, a valve plate 15 fixedly connected to the transmission rod 8, and gears 19 and bevel gears 16 fixedly connected to the two sides of the transmission rod 8 located outside the branch pipe 9, respectively.

[0036] A threaded rod 17 is rotatably connected to the outer wall of the branch pipe 9. A driven wheel 45 is fixedly connected to the end of the threaded rod 17. The driven wheel 45 is meshed with the bevel gear 16. A baffle 18 is slidably connected through the inside of the flow box 12. The end of the baffle 18 is threaded onto the outer wall of the threaded rod 17.

[0037] The side wall of the explosion-proof cavity 13 is slidably connected to a heat exchange fin 34, and a tension spring 35 is fixedly connected to the heat exchange fin 34. The other end of the tension spring 35 is fixedly connected to the outer side wall of the explosion-proof cavity 13. The interior of the explosion-proof cavity 13 is provided with a scraper 32 corresponding to the heat exchange fin 34, and a magnetic block 36 is fixedly connected to the heat exchange fin 34.

[0038] A drive plate 31 is fixedly connected to the outer wall of the heat exchange fin 34. A cooling box 33 is provided on the outside of the heat exchange fin 34. A cooler is provided inside the cooling box 33. A sliding groove corresponding to the drive plate 31 is provided at the bottom of the cooling box 33. A limiting member 30 is fixedly connected to the gear 19. The limiting member 30 contacts the end of the drive plate 31.

[0039] A vertical plate 20 is fixedly connected to the branch pipe 9. A telescopic rod 21 is provided on the vertical plate 20. A rack 22 is fixedly connected to the end of the telescopic rod 21. The rack 22 is meshed with the gear 19.

[0040] A disc 11 is connected to the bottom of the flow box 12. A spiral tube 7 is connected to the disc 11. Heat-conducting fins are provided on the spiral tube 7. A flow tube 6 is connected to the bottom of the spiral tube 7. The end of the flow tube 6 away from the disc 11 is connected to the interior of the main body 1 of the device.

[0041] The end of the branch pipe 9 away from the flow box 12 is connected to an oil storage tank 4. An oil drain pipe 5 is connected to the oil storage tank 4. An oil filling pipe 43 is connected between the oil storage tank 4 and the main body of the equipment 1. A pressure device 44 is installed inside the main body of the equipment 1.

[0042] In this embodiment, as the heat exchange fins 34 are inserted into the explosion-proof cavity 13, the magnetic block 36 moves to directly below the magnetic strip 42. Utilizing the repulsive magnetic force between the magnetic block 36 and the magnetic strip 42, the slide rod 29 overcomes the elastic force of the return spring 28 and moves upward, causing the air inlet 27, which was originally inside the cavity 25, to enter the chamber of the gas cavity 24. At this time, the inert gas pre-stored in the gas cavity 24 enters the slide rod 29 through the air inlet 27 and is then transported to the explosion-proof cavity 13 via the connecting structure of the rotating rod 38. It mixes thoroughly with the circulating high-temperature insulating oil. During this process, the high-temperature insulating oil partially vaporizes and forms a high-concentration flammable gas. Introducing inert gas into the insulating oil can quickly replace the oxygen in the oil, effectively reducing the oxygen concentration in the oil environment and fundamentally preventing the flammable gas from reaching the explosion limit, thus blocking the conditions for the formation of explosion risk.

[0043] During the 90-degree rotation of gear 19, the transmission rod 8 drives valve plate 15 to rotate synchronously, opening valve plate 15 and thus opening the flow channel of branch pipe 9. Simultaneously, as the transmission rod 8 drives valve plate 15 to rotate, it also drives bevel gear 16 to rotate. Since the gear ratio of bevel gear 16 and driven wheel 45 is set to 12:1 and they mesh with each other, when bevel gear 16 completes the 90-degree rotation, the driven wheel 45 drives threaded rod 17 to rotate three times. When threaded rod 17 rotates, it drives baffle 18 to move into flow box 12, ultimately sealing and blocking flow box 12. In this state, the oil pumped by the suction pump in main pipe 10 no longer returns to the main body 1 through the circulation path of disc 11 and spiral tube 7, but enters branch pipe 9 through the opened inner ring 14 and flows into oil storage tank 4 for unified collection through the conveying channel of branch pipe 9. This oil discharge path quickly reduces the total amount of oil inside the main body 1, achieving rapid pressure relief.

[0044] When a severe fault such as a short circuit or arc discharge occurs in winding 2, the insulating oil will instantly vaporize, and the pressure inside the main body 1 of the equipment will rise sharply. At this time, the pressure device 44 will trigger all the above-mentioned safety mechanisms, namely, to achieve rapid cooling through heat exchange fins 34, to release inert gas to block the explosion conditions, and to achieve oil discharge and pressure reduction through the cooperation of branch pipe 9 and oil storage tank 4. On this basis, the pressure device 44 will also drive the suction pump in the main pipe 10 to operate in high-power mode, and accelerate the extraction of ultra-high temperature insulating oil in the main body 1 of the equipment by increasing the suction power, further enhancing the pressure relief effect and preventing an explosion accident caused by the inability to release pressure in a short time.

[0045] When the ultra-high temperature insulating oil flows rapidly through the main pipe 10 under the high-power suction of the suction pump, the strong impact force generated by the oil flow will drive the water wheel 37 to rotate. When the water wheel 37 rotates, it drives the rotating rod 38 to rotate synchronously, which in turn causes the cam 39 to intermittently strike the end of the moving tube 40. Under the action of the pressing spring matched with the moving tube 40, the inner hole 41 will intermittently extend to the outside of the slide rod 29 to reach the bottom cavity 26. At this time, the explosion-proof agent stored in the bottom cavity 26 enters the moving tube 40 through the inner hole 41, and is transported to the explosion-proof cavity 13 through the connection structure between the moving tube 40 and the rotating rod 38. After mixing with the ultra-high temperature insulating oil, it forms a synergistic explosion-proof effect with the inert gas, further suppressing the risk of vaporization and combustion of the insulating oil and ensuring the safe operation of the equipment.

[0046] It should be noted that the moving pipe 40 is equipped with a one-way valve structure. This one-way valve can effectively prevent gas leakage through the moving pipe 40 when the slide rod 29 is conveying inert gas. At the same time, when the insulating oil is circulating normally or only slightly hot, the suction pump maintains its normal operating power. The flow impact force of the oil in the main pipe 10 is insufficient to drive the water wheel 37 to drive the rotating rod 38 and cam 39 to overcome the spring force of the pressing spring, ensuring that the explosion-proof agent will only be triggered and released in an emergency. In addition, when the pressure inside the main body 1 of the equipment returns to normal, the pressure relief oil collected in the oil tank 4 can be discharged through the oil drain pipe 5. After simple degassing and filtration, it can be reinjected into the main body 1 for circulation. Nitrogen is selected as the inert gas in this technical solution. It has non-flammable and non-combustible chemical properties and does not react chemically with insulating oil or methyl silicone oil, and will not generate corrosive or... Conductive impurities do not affect the reusability of the oil. The explosion extinguishing agent is methyl silicone oil, which is chemically inert and does not react with insulating oil or the aforementioned inert gases. It also has excellent high-temperature resistance and can form a stable protective film on the surface of oil droplets. By inhibiting the volatilization of oil and gas, it further blocks the conditions for explosion. The capacity of the oil storage tank 4 is designed to be 15% of the oil storage capacity of the main body 1. This capacity ratio ensures that when the pressure inside the main body 1 is unbalanced, the internal pressure can be reduced from the explosion risk threshold to the safe operating range by discharging 15% of the oil, ensuring the safety protection effect of the equipment under various fault scenarios. The gas chamber 24 and the bottom chamber 26 are equipped with adding pipes for easy replenishment. When the internal pressure of the main body 1 returns to normal and the heat exchange fins 34 move out of the explosion extinguishing chamber 13, the scraper 32 will scrape the surface of the heat exchange fins 34 to prevent the surface of the heat exchange fins 34 from being contaminated with insulating oil.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof oil-immersed transformer, comprising a main body (1), wherein a cooler is provided inside the main body (1), characterized in that, The main body (1) of the equipment is equipped with a winding (2) with multiple insulators. An explosion-proof box (3) is installed on the side wall of the main body (1). A main pipe (10) is connected to the main body (1). A suction pump is installed on the main pipe (10). The end of the main pipe (10) away from the main body (1) is connected to the interior of the explosion-proof box (3). A flow box (12) is connected to the end of the main pipe (10). A branch pipe (9) is connected to the flow box (12). The branch pipe (9) is provided with a circulating diversion cooling mechanism, the main pipe (10) is provided with an explosion-proof cavity (13), a storage box (23) is fixedly connected to the outer wall of the explosion-proof cavity (13), and an explosion-proof pressure relief mechanism is provided on the storage box (23). The explosion-proof pressure relief mechanism includes a gas cavity (24), an empty cavity (25) and a bottom cavity (26) opened inside the storage box (23). A slide rod (29) is slidably connected to the gas cavity (24), the empty cavity (25), the explosion-proof cavity (13) and the bottom cavity (26). An air inlet (27) is provided on the slide rod (29). A rotating rod (38) is rotatably connected through the inside of the slide rod (29). A water wheel (37) is fixedly connected to the lower end of the rotating rod (38). A magnetic strip (42) is fixedly connected to the bottom of the rotating rod (38). A return spring (28) is sleeved on the outer wall of the slide rod (29). A cam (39) is fixedly connected to one end of the rotating rod (38) inside the slide rod (29). A moving tube (40) is slidably connected through the slide rod (29). The end of the moving tube (40) outside the slide rod (29) is sealed. An inner hole (41) is provided on the moving tube (40). A pressing spring is sleeved on the moving tube (40).

2. The explosion-proof oil-immersed transformer according to claim 1, characterized in that: The circulating diversion cooling mechanism includes an inner ring (14) fixedly connected inside the branch pipe (9), a transmission rod (8) rotatably connected through the inner ring (14), a valve plate (15) fixedly connected to the transmission rod (8), and gears (19) and bevel gears (16) fixedly connected to the two sides of the transmission rod (8) outside the branch pipe (9).

3. The explosion-proof oil-immersed transformer according to claim 1, characterized in that: A threaded rod (17) is rotatably connected to the outer wall of the branch pipe (9). A driven wheel (45) is fixedly connected to the end of the threaded rod (17). The driven wheel (45) is meshed with the bevel gear (16). A baffle (18) is slidably connected through the inside of the flow box (12). The end of the baffle (18) is threaded onto the outer wall of the threaded rod (17).

4. The explosion-proof oil-immersed transformer according to claim 1, characterized in that: The side wall of the explosion-proof cavity (13) is slidably connected to a heat exchange fin (34), and a tension spring (35) is fixedly connected to the heat exchange fin (34). The other end of the tension spring (35) is fixedly connected to the outer side wall of the explosion-proof cavity (13). The interior of the explosion-proof cavity (13) is provided with a scraper (32) corresponding to the heat exchange fin (34), and a magnetic block (36) is fixedly connected to the heat exchange fin (34).

5. The explosion-proof oil-immersed transformer according to claim 4, characterized in that: A drive plate (31) is fixedly connected to the outer wall of the heat exchange fin (34). A cooling box (33) is provided on the outside of the heat exchange fin (34). A cooler is provided inside the cooling box (33). A sliding groove corresponding to the drive plate (31) is provided at the bottom of the cooling box (33).

6. The explosion-proof oil-immersed transformer according to claim 2, characterized in that: A limiting member (30) is fixedly connected to the gear (19). The limiting member (30) contacts the end of the drive plate (31). A vertical plate (20) is fixedly connected to the branch pipe (9). A telescopic rod (21) is provided on the vertical plate (20). A rack (22) is fixedly connected to the end of the telescopic rod (21). The rack (22) meshes with the gear (19).

7. The explosion-proof oil-immersed transformer according to claim 1, characterized in that: The bottom of the flow box (12) is connected to a disc (11), a spiral tube (7) is connected to the disc (11), heat-conducting fins are provided on the spiral tube (7), and a flow tube (6) is connected to the bottom of the spiral tube (7). The end of the flow tube (6) away from the disc (11) is connected to the interior of the main body (1) of the device.

8. The explosion-proof oil-immersed transformer according to claim 1, characterized in that: The branch pipe (9) is connected to an oil storage tank (4) at the end away from the flow box (12). An oil drain pipe (5) is connected to the oil storage tank (4). An oil filling pipe (43) is connected between the oil storage tank (4) and the main body of the equipment (1). A pressure device (44) is installed inside the main body of the equipment (1).

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