Internal fault impact energy slow release structure of transformer

Abstract

The invention discloses a transformer internal fault impact energy slow release structure, and relates to the technical field of transformers. The transformer internal fault impact energy slow release structure comprises a fixed cover communicating with a transformer body, a sliding plate is slidably connected into the fixed cover, a plurality of heat conduction rods are fixedly inserted into the side wall of the sliding plate, and a cooling cover is fixedly connected to the side wall of the fixed cover; and one end of the heat conduction rod penetrates through the side wall of the fixed cover and is fixedly connected with a movable plate, the movable plate slides in the cooling cover, when high-temperature and high-pressure oil gas is generated in the transformer body, the oil gas pressure pushes the sliding plate to move into the fixed cover, and the movable plate is driven by the heat conduction rod to move in cooling liquid in the cooling cover. The hydraulic spring rod is compressed firstly, and primary mechanical buffering is achieved; through the through holes in the movable plate, cooling liquid flows to generate damping, secondary fluid buffering is formed, the impact energy peak value is obviously consumed, and the instantaneous impact on the transformer body is reduced.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, specifically to a structure for mitigating the impact energy of internal faults in a transformer. Background Technology

[0002] As the core equipment for power transmission and transformation in a power system, the operational stability of transformers directly determines the safe and reliable power supply of the power network. They belong to the smart grid industry and include intelligent large-scale transformers, DC converter transformers, and intelligent reactors. Under conditions such as long-term high-load operation, insulation aging, internal short circuits, or partial discharge, transformers are prone to sudden internal faults, instantly generating a large amount of high-temperature, high-pressure oil-gas mixture. This faulty oil-gas can rapidly accumulate and form a violent impact energy, causing a sharp increase in internal pressure within the transformer in a short period. If it cannot be channeled and mitigated in time, it can easily cause deformation of the transformer tank, rupture of the sealing structure, or even explosion of the casing. This not only leads to irreversible damage to the equipment and causes large-scale power outages, but also may cause secondary disasters such as fires and explosions due to oil-gas leaks, posing a serious threat to the safety of surrounding personnel and power facilities.

[0003] When existing transformers are in use, if a fault occurs that causes high-temperature and high-pressure oil and gas to be generated inside, it is usually discharged directly through a valve.

[0004] However, the temperature of the oil-gas mixture can reach several hundred degrees Celsius and has high-pressure impact. Furthermore, the vapor of transformer oil is a flammable and explosive medium. When high-pressure oil and gas are directly sprayed out through the valve, not only will electrostatic sparks be generated due to the high-speed injection, but the high-temperature oil vapor will also mix directly and thoroughly with the air, which can easily trigger a combustion explosion. At the same time, the high-pressure oil and gas will form a high-speed jet, which can cause burns and impact injuries to personnel on site, and may also splash and ignite surrounding flammable materials, making it unsafe and unreliable. Summary of the Invention

[0005] The purpose of this invention is to provide a structure for mitigating the impact energy of internal faults in transformers, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a transformer internal fault impact energy mitigation structure, comprising a fixed cover communicating with the transformer body, a sliding plate slidably connected inside the fixed cover, and multiple heat-conducting rods fixedly inserted into the side wall of the sliding plate, a cooling cover fixedly connected to the side wall of the fixed cover, and one end of the heat-conducting rods penetrating through the side wall of the fixed cover and fixedly connected to a movable plate, the movable plate sliding inside the cooling cover, the cooling cover being filled with coolant, and multiple arrayed through holes being opened on the side wall of the movable plate, the movable plate being connected to the inner wall of the cooling cover via a hydraulic spring rod, and a mitigation mechanism for slowly releasing high-temperature and high-pressure oil and gas being provided at the top of the fixed cover.

[0007] Preferably, the slow-release mechanism includes an exhaust pipe connected to the top of the fixed cover, and a first one-way valve is provided inside the exhaust pipe. A mounting bracket is fixedly connected to the top of the transformer body, and a slow-release tank is fixedly connected to the side wall of the mounting bracket. The slow-release tank is connected to the exhaust pipe, and a vent valve is provided at the top of the slow-release tank. The slow-release tank is filled with inert gas, and an agitation mechanism is provided inside the slow-release tank. A gas concentration sensor is provided inside the slow-release tank, and a gas replenishment valve is provided on the side wall of the slow-release tank.

[0008] Preferably, the stirring mechanism includes a rotating rod that rotates inside the slow-release tank, and multiple stirring rods are fixedly connected to the side wall of the rotating rod. The rotation of the rotating rod is driven by a driving mechanism.

[0009] Preferably, the drive mechanism includes a driven pulley fixedly connected to the lower end of the rotating rod, and the side wall of the exhaust pipe is rotatably connected to a driving pulley via a power assembly, with belts sleeved on the side walls of the driving pulley and the driven pulley.

[0010] Preferably, the power assembly includes a mounting cover fixedly inserted into the side wall of the exhaust pipe, and a rotating fan is rotatably connected inside the mounting cover via a first rotating shaft, the lower end of the first rotating shaft being fixed to the top of the drive pulley.

[0011] Preferably, the side wall of the cooling shroud is provided with a circulation mechanism for circulating the coolant. The circulation mechanism includes a connecting frame fixedly connected to the side wall of the cooling shroud, and a working shroud is fixedly connected to the side wall of the connecting frame. The working shroud is connected to a liquid extraction pipe and a liquid return pipe. A second one-way valve is provided in the liquid extraction pipe, and a third one-way valve is provided in the liquid return pipe. A squeezing block is connected to the working shroud through a reset mechanism. The movement of the squeezing block is driven by a pushing mechanism.

[0012] Preferably, the reset mechanism includes two symmetrically arranged first connecting blocks fixedly connected to the side wall of the extrusion block, and a T-shaped guide rod is fixedly connected to the side wall of each first connecting block. A second connecting block is sleeved on the side wall of the T-shaped guide rod, the second connecting block is fixed to the side wall of the working cover, and a reset spring is sleeved on the side wall of each T-shaped guide rod.

[0013] Preferably, the pushing mechanism includes a rotating disk, which is rotatably connected to the side wall of the cooling hood via a rotating mechanism, and the side wall of the rotating disk is fixedly connected with a plurality of arrayed protrusions.

[0014] Preferably, the rotating mechanism includes a fixed plate fixedly connected to the side wall of the cooling hood, the rotating disk is rotatably connected to the top of the fixed plate through a second rotating shaft, and the rotation of the second rotating shaft is driven by a driving assembly.

[0015] Preferably, the drive assembly includes a rubber roller fixedly sleeved on the side wall of the second rotating shaft, and a mounting rod is fixedly connected to the side wall of the moving plate. The end of the mounting rod away from the moving plate passes through the side wall of the cooling cover and is fixedly connected to a friction plate, and the rubber roller can roll on the surface of the friction plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. Multi-stage buffering and initial cooling function: When high-temperature, high-pressure oil and gas are generated inside the transformer body, the oil and gas pressure pushes the sliding plate into the fixed cover. The moving plate moves within the coolant in the cooling cover via heat-conducting rods. The hydraulic spring rod is first compressed, achieving primary mechanical buffering; the through holes on the moving plate dampen the coolant flow, forming secondary fluid buffering, significantly consuming the peak impact energy and reducing the instantaneous impact on the transformer body. Simultaneously, the heat-conducting rods rapidly transfer heat to the coolant, achieving initial rapid cooling of the high-temperature oil and gas and reducing its risk of combustion and explosion.

[0017] 2. Safe and controllable slow-release and inerting mixing mechanism: If the internal pressure still exceeds the safety threshold after buffering and cooling, the oil and gas will pass through the bottom of the exhaust pipe and enter the slow-release tank. The tank is pre-filled with inert gas, and the oil and gas are efficiently mixed with the inert gas through a stirring mechanism (driven by the flow of oil and gas), significantly reducing the concentration of flammable gas and the risk of combustion and explosion. A gas concentration sensor monitors the inert gas concentration in real time, and automatically starts the gas replenishment system when it falls below the set value (e.g., 85%) to ensure continuous flame-retardant effect. The vent valve can slowly and controllably release the gas when the pressure reaches the safe release value, avoiding direct injection that could cause secondary accidents.

[0018] 3. Self-driven coolant circulation system for improved heat dissipation efficiency: The reciprocating motion of the moving plate is converted into the rotation of the rotating disk through a friction plate-rubber roller mechanism, which in turn drives the extrusion block to reciprocate within the working hood, achieving automatic circulation of coolant between the cooling hood and the working hood. This circulation process requires no external power, relying on the energy of a fault impact to drive itself. This not only enhances the convective heat transfer capacity of the coolant but also avoids localized overheating, significantly improving the system's continuous heat dissipation efficiency and reliability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the fixing cover and the cooling cover in this invention; Figure 3 This is a schematic diagram of the overall structure of the fixing cover and cooling cover from another perspective in this invention; Figure 4 This is a partial cross-sectional view of the fixing cover, cooling cover, slow-release tank, and mounting cover in this invention. Figure 5This is a schematic diagram of the agitation mechanism and the drive mechanism in this invention; Figure 6 This is a partial cross-sectional view of the working cover in this invention.

[0020] In the diagram: 1. Transformer body; 201. Exhaust pipe; 202. Mounting frame; 203. Slow-release tank; 204. Venting valve; 301. Rotating rod; 302. Stirring rod; 401. Driven pulley; 402. Driving pulley; 403. Belt; 501. Mounting cover; 502. First rotating shaft; 503. Rotating fan; 601. Connecting frame; 602. Working cover; 603. Squeezing block; 604. Liquid extraction pipe; 605. Return liquid. 701. Pipe; 702. First connecting block; 703. T-shaped guide rod; 704. Second connecting block; 705. Return spring; 801. Rotating disk; 802. Protrusion; 901. Fixing plate; 902. Second rotating shaft; 1001. Rubber roller; 1002. Mounting rod; 1003. Friction plate; 11. Fixing cover; 12. Cooling cover; 13. Sliding plate; 14. Heat conducting rod; 15. Moving plate; 16. Through hole; 17. Hydraulic spring rod. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-6 This invention provides a fault impact energy mitigation structure for transformers, including a fixed cover 11 connected to the transformer body 1. A sliding plate 13 is slidably connected inside the fixed cover 11, and multiple heat-conducting rods 14 are fixedly inserted into the side wall of the sliding plate 13. A cooling cover 12 is fixedly connected to the side wall of the fixed cover 11, and one end of the heat-conducting rod 14 penetrates through the side wall of the fixed cover 11 and is fixedly connected to a moving plate 15. The moving plate 15 slides inside the cooling cover 12, which is filled with coolant. Multiple arrayed through holes 16 are opened on the side wall of the moving plate 15. The moving plate 15 is connected to the inner wall of the cooling cover 12 through a hydraulic spring rod 17. A mitigation mechanism for mitigating high-temperature and high-pressure oil and gas is provided on the top of the fixed cover 11. This integrated fault impact energy mitigation function combines multi-stage buffering, efficient cooling, and stable mitigation, making it safer and more reliable.

[0023] As one implementation, a sealing ring is provided at the position where the fixed cover 11 and the heat-conducting rod 14 cooperate to ensure its sealing performance and prevent the coolant in the cooling cover 12 from entering the fixed cover 11, thereby preventing it from entering the transformer body 1.

[0024] As a supplement, an isolation cavity can be designed between the fixed cover 11 and the sliding plate 13 to prevent trace amounts of coolant from seeping in. The coolant will be isolated in this cavity and will not directly enter the transformer body 1. A drain channel can be provided at the bottom of the isolation cavity to allow any leaked coolant to flow back into the cooling cover 12 periodically.

[0025] Please see Figure 1 , Figure 2 , Figure 4 and Figure 5 The slow-release mechanism includes an exhaust pipe 201 connected to the top of the fixed cover 11, and a first one-way valve is provided inside the exhaust pipe 201. The first one-way valve is directed from the fixed cover 11 to the slow-release tank 203. A mounting bracket 202 is fixedly connected to the top of the transformer body 1, and a slow-release tank 203 is fixedly connected to the side wall of the mounting bracket 202. The slow-release tank 203 is connected to the exhaust pipe 201, and a vent valve 204 is provided on the top of the slow-release tank 203. The slow-release tank 203 is filled with inert gas, and an agitation mechanism is provided inside the slow-release tank 203. A gas concentration sensor is provided inside the slow-release tank 203, and a gas replenishment valve is provided on the side wall of the slow-release tank 203. After buffering and cooling are completed, if the pressure inside the transformer body 1 is still too high, it will push the sliding plate 13 to continue moving along the fixed cover 11. When it passes the bottom of the exhaust pipe 201, the high temperature and high pressure oil gas inside the fixed cover 11 can enter the slow release tank 203 through the exhaust pipe 201 and mix with the inert gas inside. The concentration of inert gas in the gas box is monitored in real time by the gas concentration sensor. When the concentration is lower than 85%, the inert gas replenishment system is automatically turned on to replenish the mixed gas in the gas box to a concentration of more than 95% to ensure a continuous flame retardant effect. When the set pressure relief is reached, it is slowly released through the vent valve 204, which is safer and more reliable.

[0026] Please see Figure 5 The stirring mechanism includes a rotating rod 301 that rotates inside the slow-release tank 203, and multiple stirring rods 302 are fixedly connected to the side wall of the rotating rod 301. The rotation of the rotating rod 301 is driven by a driving mechanism, which drives the rotating rod 301 to rotate and simultaneously drives the stirring rods 302 to stir, thereby making the mixing of high-temperature and high-pressure oil and gas with inert gas more efficient and effective.

[0027] Please see Figure 5The drive mechanism includes a driven pulley 401 fixedly connected to the lower end of the rotating rod 301. The side wall of the exhaust pipe 201 is rotatably connected to the driving pulley 402 through the power assembly. The side walls of the driving pulley 402 and the driven pulley 401 are fitted with belts 403. When high-temperature and high-pressure oil and gas enter the exhaust pipe 201, the driving pulley 402 can be driven to rotate through the power assembly. At the same time, the driven pulley 401 is driven to rotate through the belt 403, which in turn drives the stirring rod 302 to rotate through the rotating rod 301.

[0028] Please see Figure 5 The power assembly includes a mounting cover 501 fixedly inserted into the side wall of the exhaust pipe 201, and a rotating fan 503 is rotatably connected inside the mounting cover 501 via a first rotating shaft 502. The lower end of the first rotating shaft 502 is fixed to the top of the drive pulley 402. When high-temperature and high-pressure oil and gas enter the exhaust pipe 201, they can enter the mounting cover 501 and impact the surface of the rotating fan 503, causing it to rotate. When the rotating fan 503 rotates, it can drive the drive pulley 402 to rotate.

[0029] Please see Figure 4 and Figure 6 The cooling shroud 12 has a circulation mechanism on its side wall for circulating the coolant. The circulation mechanism includes a connecting frame 601 fixedly connected to the side wall of the cooling shroud 12, and a working shroud 602 fixedly connected to the side wall of the connecting frame 601. The working shroud 602 is connected to a suction pipe 604 and a return pipe 605. A second check valve is installed in the suction pipe 604, with its direction of flow from the cooling shroud 12 to the working shroud 602. A third check valve is installed in the return pipe 605, with its direction of flow from the working shroud 602 to the cooling shroud 12. A pressing block 603 is connected to the working shroud 602 via a reset mechanism. The movement of the pressing block 603 is achieved by a pushing mechanism. The extrusion block 603 moves back and forth within the working cover 602. When the extrusion block 603 moves away from the working cover 602, a negative pressure is generated within the working cover 602. Simultaneously, the second one-way valve opens and the third one-way valve closes. At this time, the coolant in the cooling cover 12 can enter the working cover 602 through the extraction pipe 604. When the extrusion block 603 moves into the working cover 602, it can extrude the coolant within the working cover 602. At the same time, the second one-way valve closes and the third one-way valve opens, allowing the coolant in the working cover 602 to return to the cooling cover 12 through the return pipe 605. This process is repeated to circulate the coolant within the cooling cover 12, resulting in higher cooling efficiency and better effect.

[0030] Please see Figure 6The reset mechanism includes two symmetrically arranged first connecting blocks 701 fixedly connected to the side wall of the extrusion block 603, and a T-shaped guide rod 702 fixedly connected to the side wall of each first connecting block 701. A second connecting block 703 is sleeved on the side wall of the T-shaped guide rod 702. The second connecting block 703 is fixed to the side wall of the working cover 602, and a reset spring 704 is sleeved on the side wall of each T-shaped guide rod 702, which guides and resets the movement of the extrusion block 603.

[0031] Please see Figure 4 and Figure 6 The driving mechanism includes a rotating disk 801, which is rotatably connected to the side wall of the cooling hood 12 via a rotating mechanism. The side wall of the rotating disk 801 is fixedly connected with a plurality of arrayed protrusions 802. The rotating mechanism drives the rotating disk 801 to rotate. When the protrusions 802 abut against the side wall of the extrusion block 603, they can push the extrusion block 603 to move into the working hood 602.

[0032] Please see Figure 3 and Figure 6 The rotating mechanism includes a fixed plate 901 fixedly connected to the side wall of the cooling cover 12. The rotating disk 801 is rotatably connected to the top of the fixed plate 901 through a second rotating shaft 902. The rotation of the second rotating shaft 902 is driven by a drive assembly, which drives the second rotating shaft 902 to rotate and drives the rotating disk 801 to rotate.

[0033] Please see Figure 4 and Figure 6 The driving assembly includes a rubber roller 1001 fixedly sleeved on the side wall of the second rotating shaft 902, and an mounting rod 1002 fixedly connected to the side wall of the moving plate 15. The end of the mounting rod 1002 away from the moving plate 15 passes through the side wall of the cooling cover 12 and is fixedly connected to a friction plate 1003. The rubber roller 1001 can roll on the surface of the friction plate 1003. When the moving plate 15 moves, it can drive the friction plate 1003 to move through the mounting rod 1002, so that the rubber roller 1001 can roll on the side wall of the friction plate 1003. When the rubber roller 1001 rotates, it can drive the rotating disk 801 to rotate through the second rotating shaft 902.

[0034] Working principle: During use, when high-temperature and high-pressure oil and gas are generated inside the transformer body 1, the pressure pushes the sliding plate 13 to move into the fixed cover 11. At the same time, the heat-conducting rod 14 drives the moving plate 15 to move inside the cooling cover 12. The hydraulic spring rod 17 can be gradually compressed, providing a primary buffering effect. Furthermore, when the moving plate 15 moves inside the cooling cover 12, the coolant can flow through the through hole 16, providing a damping buffering effect, providing a secondary buffering effect. The buffering effect is better, providing protection for the transformer body 1, making it safer and more reliable. It initially consumes the pressure peak. In addition, the heat-conducting rod 14 can move into the cooling cover 12 and exchange heat under the action of the coolant, thereby facilitating the cooling operation of the high-temperature and high-pressure oil and gas inside the transformer body 1, making it safer and more reliable. If the pressure drops below the safety threshold, there is no need to release pressure through the slow-release mechanism, avoiding excessive pressure release that could lead to insulation oil loss.

[0035] After buffering and cooling are completed, if the pressure inside the transformer body 1 is still too high, it will push the sliding plate 13 to continue moving along the fixed cover 11. When it passes the bottom of the exhaust pipe 201, the high-temperature and high-pressure oil and gas inside the fixed cover 11 can enter the slow release tank 203 through the exhaust pipe 201 and mix with the inert gas inside. At the same time, when the high-temperature and high-pressure oil and gas enters the exhaust pipe 201, it can enter the mounting cover 501 and impact the surface of the rotating fan 503, causing it to rotate. When the rotating fan 503 rotates, it can drive the drive pulley 402 to rotate. The system rotates, and simultaneously, the driven pulley 401 rotates via the belt 403, which in turn drives the stirring rod 302 to rotate via the rotating rod 301. This makes the mixing efficiency of high-temperature and high-pressure oil and gas with inert gas higher and better. The concentration of inert gas in the gas box is monitored in real time by a gas concentration sensor. When the concentration is lower than 85%, the inert gas replenishment system is automatically activated to replenish the mixed gas in the gas box to a concentration of over 95%, ensuring a continuous flame-retardant effect. When the set pressure relief is reached, the gas is slowly released through the vent valve 204, making it safer and more reliable.

[0036] When the movable plate 15 moves, it can drive the friction plate 1003 to move via the mounting rod 1002, allowing the rubber roller 1001 to roll on the side wall of the friction plate 1003. When the rubber roller 1001 rotates, it can drive the rotating disk 801 to rotate via the second rotating shaft 902. When the protrusion 802 abuts against the side wall of the extrusion block 603, it can push the extrusion block 603 to move into the working cover 602. At the same time, the return spring 704 is compressed. When the protrusion 802 passes the side wall of the extrusion block 603, the extrusion block 603 can move away from the working cover 602 and reset under the action of the return spring 704. This process is repeated to achieve the desired effect. The extrusion block 603 moves back and forth inside the working cover 602. When the extrusion block 603 moves away from the working cover 602, it creates a negative pressure inside the working cover 602. At the same time, the second one-way valve opens and the third one-way valve closes. At this time, the coolant in the cooling cover 12 can enter the working cover 602 through the liquid extraction pipe 604. When the extrusion block 603 moves into the working cover 602, it can extrude the coolant in the working cover 602. At the same time, the second one-way valve closes and the third one-way valve opens, allowing the coolant in the working cover 602 to return to the cooling cover 12 through the liquid return pipe 605. This process is repeated to circulate the coolant in the cooling cover 12, resulting in higher cooling efficiency and better effect.

[0037] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0038] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A structure for mitigating the impact energy of an internal fault in a transformer, comprising a fixed cover (11) connected to the transformer body (1), characterized in that: A sliding plate (13) is slidably connected inside the fixed cover (11), and multiple heat-conducting rods (14) are fixedly inserted into the side wall of the sliding plate (13). A cooling cover (12) is fixedly connected to the side wall of the fixed cover (11), and one end of the heat-conducting rod (14) passes through the side wall of the fixed cover (11) and is fixedly connected to a moving plate (15). The moving plate (15) slides inside the cooling cover (12). The cooling cover (12) is filled with coolant, and multiple arrayed through holes (16) are opened on the side wall of the moving plate (15). The moving plate (15) is connected to the inner wall of the cooling cover (12) through a hydraulic spring rod (17), and a slow-release mechanism for slow-release of high-temperature and high-pressure oil and gas is provided on the top of the fixed cover (11).

2. The transformer internal fault impact energy mitigation structure according to claim 1, characterized in that: The slow-release mechanism includes an exhaust pipe (201) connected to the top of the fixed cover (11), and a first one-way valve is provided in the exhaust pipe (201). The top of the transformer body (1) is fixedly connected to a mounting bracket (202), and a slow-release tank (203) is fixedly connected to the side wall of the mounting bracket (202). The slow-release tank (203) is connected to the exhaust pipe (201), and a venting valve (204) is provided on the top of the slow-release tank (203). The slow-release tank (203) is filled with inert gas, and a stirring mechanism is provided in the slow-release tank (203). A gas concentration sensor is provided in the slow-release tank (203), and a gas replenishment valve is provided on the side wall of the slow-release tank (203).

3. The transformer internal fault impact energy mitigation structure according to claim 2, characterized in that: The stirring mechanism includes a rotating rod (301) that rotates inside the slow-release tank (203), and a plurality of stirring rods (302) are fixedly connected to the side wall of the rotating rod (301). The rotation of the rotating rod (301) is driven by a driving mechanism.

4. The transformer internal fault impact energy mitigation structure according to claim 3, characterized in that: The drive mechanism includes a driven pulley (401) fixedly connected to the lower end of the rotating rod (301), and the side wall of the exhaust pipe (201) is rotatably connected to the driving pulley (402) through the power assembly. The side walls of the driving pulley (402) and the driven pulley (401) are fitted with belts (403).

5. The transformer internal fault impact energy mitigation structure according to claim 4, characterized in that: The power assembly includes a mounting cover (501) fixedly inserted into the side wall of the exhaust pipe (201), and a rotating fan (503) is rotatably connected inside the mounting cover (501) via a first rotating shaft (502), the lower end of the first rotating shaft (502) being fixed to the top of the drive pulley (402).

6. The transformer internal fault impact energy mitigation structure according to claim 1, characterized in that: The cooling cover (12) has a circulation mechanism for circulating the coolant on its side wall. The circulation mechanism includes a connecting frame (601) fixedly connected to the side wall of the cooling cover (12), and a working cover (602) is fixedly connected to the side wall of the connecting frame (601). The working cover (602) is connected to the liquid extraction pipe (604) and the liquid return pipe (605). A second one-way valve is provided in the liquid extraction pipe (604), and a third one-way valve is provided in the liquid return pipe (605). A squeezing block (603) is connected to the working cover (602) through a reset mechanism. The movement of the squeezing block (603) is driven by a pushing mechanism.

7. The transformer internal fault impact energy mitigation structure according to claim 6, characterized in that: The reset mechanism includes two symmetrically arranged first connecting blocks (701) fixedly connected to the side wall of the extrusion block (603), and a T-shaped guide rod (702) is fixedly connected to the side wall of each first connecting block (701). A second connecting block (703) is sleeved on the side wall of the T-shaped guide rod (702). The second connecting block (703) is fixed to the side wall of the working cover (602), and a reset spring (704) is sleeved on the side wall of each T-shaped guide rod (702).

8. The transformer internal fault impact energy mitigation structure according to claim 6, characterized in that: The pushing mechanism includes a rotating disk (801), which is rotatably connected to the side wall of the cooling cover (12) through a rotating mechanism, and the side wall of the rotating disk (801) is fixedly connected with a plurality of arrayed protrusions (802).

9. The transformer internal fault impact energy mitigation structure according to claim 8, characterized in that: The rotating mechanism includes a fixed plate (901) fixedly connected to the side wall of the cooling cover (12). The rotating disk (801) is rotatably connected to the top of the fixed plate (901) through a second rotating shaft (902), and the rotation of the second rotating shaft (902) is driven by a driving assembly.

10. A transformer internal fault impact energy mitigation structure according to claim 9, characterized in that: The drive assembly includes a rubber roller (1001) fixedly sleeved on the side wall of the second rotating shaft (902), and a mounting rod (1002) fixedly connected to the side wall of the moving plate (15). The end of the mounting rod (1002) away from the moving plate (15) passes through the side wall of the cooling cover (12) and is fixedly connected to a friction plate (1003). The rubber roller (1001) can roll on the surface of the friction plate (1003).

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