Oil-immersed high-voltage power supply transformer and use method
By adopting a dual shell structure and dual safety guarantee measures in oil-immersed high-voltage powered transformer, the problems of low heat dissipation efficiency and lack of fire extinguishing devices in traditional transformers are solved, and more efficient heat dissipation and higher safety are achieved.
Patent Information
- Application Number
- CN202411971715.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-04-11
AI Technical Summary
Traditional oil-immersed transformers have low heat dissipation efficiency and lack effective fire extinguishing devices, which poses safety hazards.
An oil-immersed high-voltage power supply transformer is designed, adopting a dual shell structure to improve heat dissipation efficiency, and a fire-fighting carbon dioxide tank and a high-pressure nitrogen tank are installed in the transformer to provide double safety guarantees. The transformer uses oil pipes and heat sinks to match the heat sinks, which significantly improves the heat dissipation efficiency and extinguishes the fire by spraying carbon dioxide and nitrogen in the event of a fire.
It improves the heat dissipation efficiency of the transformer, ensures stable operation in high-temperature environments, and through dual safety assurance measures, the risk of fire and explosion is significantly reduced, and the safety and reliability of the transformer is improved.
Smart Images
Figure CN119811840A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of transformers, and in particular to an oil-immersed high-voltage power supply transformer and a use method thereof. Background Art
[0002] Oil-immersed transformer is a widely used power distribution equipment. The main difference from dry-type transformer is that it uses transformer oil as cooling and insulating medium. The core structure of oil-immersed transformer includes the following key parts; Body: This is the main body of the transformer, including the iron core, windings (also called coils), insulating structural parts, leads and tap changers. The oil tank consists of the oil tank body and its accessories, and is filled with insulating transformer oil. The iron core and windings are completely immersed in this layer of transformer oil, which not only acts as an insulator but also helps dissipate heat.
[0003] Conventional oil-immersed transformers generally rely on heat sinks and air for heat exchange, and have low heat dissipation efficiency. Most metallurgical equipment in industrial and mining enterprises usually runs continuously without stopping, which requires the transformer to work continuously. However, since traditional transformers lack effective heat dissipation methods, the temperature of the insulating oil will continue to rise. At the same time, since the insulating oil will volatilize certain flammable gases under high temperature conditions, untimely heat dissipation will cause the radiator to catch fire or explode. Conventional transformers themselves are not equipped with fire extinguishing devices and cannot extinguish the flames in the early stages of a fire, posing a major safety hazard. Summary of the invention
[0004] In order to solve the problems of poor heat dissipation efficiency and lack of fire extinguishing device of traditional oil-immersed transformers, the present invention proposes an oil-immersed high-voltage power supply transformer and a use method to solve the above problems.
[0005] An oil-immersed high-voltage power supply transformer comprises a shell, a plurality of high-voltage bushings and a plurality of low-voltage bushings are installed on the top of the shell, the shell comprises a first shell and a second shell, the second shell is located inside the first shell, an interlayer is provided between the first shell and the second shell, an oil chamber is provided inside the second shell, a transformer coil is installed inside the second shell, the second shell is filled with insulating oil, the transformer coil comprises a first winding and a second winding, an iron core is provided between the first winding and the second winding, and oil pipelines are installed on both sides of the shell;
[0006] Furthermore, a first interlayer is provided at the bottom of the shell, a fire-fighting carbon dioxide tank is installed inside the first interlayer, a partition is provided at the nozzle of the fire-fighting carbon dioxide tank, the partition is fixedly connected to the shell, and a rotating nozzle and a control valve are provided at the nozzle of the fire-fighting carbon dioxide tank;
[0007] Further, a pressure relief manhole is provided at the top of the second housing. A high-pressure nitrogen tank is installed at the top of the interlayer between the second housing and the first housing. A control valve is installed at the mouth of the high-pressure nitrogen tank. One end of the control valve is connected to the mouth of the high-pressure nitrogen tank, and the other end of the control valve is connected to a spray pipe. The spray pipe extends into the interior of the second housing and is flush with the inner surface of the second housing. The fire-fighting carbon dioxide tank and the high-pressure nitrogen tank installed in the first interlayer provide double safety guarantees for the transformer. When the transformer overheats or catches fire, the fire-fighting carbon dioxide tank can quickly release gas for fire extinguishing, while the high-pressure nitrogen tank can inject high-pressure nitrogen into the transformer through the control valve to help the insulating oil drain out, protecting the transformer from further damage. At the same time, due to the special working environment of industrial and mining enterprises, a double housing is set up to prevent a large amount of external heat from being conducted into the internal insulating oil.
[0008] Further, the oil pipelines are arranged in two rows. The two rows of oil pipelines are arranged one above the other along the surface of the housing. Each row of oil pipelines is evenly distributed. Heat dissipation fins are installed between the adjacent upper and lower oil pipelines. There are multiple heat dissipation fins, and the multiple heat dissipation fins are evenly distributed on the surface of the oil pipelines along the direction away from the housing. A cavity is provided inside the heat dissipation fin, and the cavity is communicated with the inside of the oil pipeline. A groove is provided on one side surface of the heat dissipation fin, and the other side surface of the heat dissipation fin is a smooth surface. A heat dissipation fan is installed below the heat dissipation fin. Through the arrangement of two rows of evenly distributed oil pipelines and multiple heat dissipation fins, one side surface of the heat dissipation fin is a smooth surface and the other side surface is relatively rough, which will form a micro air vortex effect, significantly improving the heat dissipation efficiency of the transformer. The cavity inside the heat dissipation fin is communicated with the oil pipeline, and with the assistance of the heat dissipation fan, the heat can be more effectively taken away from the inside of the transformer, ensuring that the transformer can operate stably even in a high-temperature environment.
[0009] Further, a drain port is provided at the bottom of the housing. A pressure relief valve is provided at the upper opening of the drain port, and a magnetic dust-proof net is provided at the lower opening of the drain port. The opening pressures of the pressure relief valve and the pressure relief manhole are different. The settings of the pressure relief manhole and the pressure relief valve enable the transformer to safely relieve pressure when the internal pressure is too high, preventing explosion accidents. At the same time, the cooperation of the drain port and the magnetic dust-proof net ensures that the transformer can drain fluid smoothly when needed, while preventing dust and other impurities from entering the inside of the transformer.
[0010] Further, the second housing is a semi-wrapped structure. The cross-section of the second housing is in a U shape. The open end of the U shape is connected to the bottom inner surface of the first housing. A connecting plate is fitted to the open end of the U shape. The connecting plate is fixedly connected to the bottom inner surface of the first housing. Sliding grooves are provided around the connecting plate, and the edges of the open end of the U shape are fitted to the sliding grooves. The second housing and the connecting plate are alloy plates with different expansion values.
[0011] Furthermore, an oil chamber is provided inside the high-voltage bushing, the oil chamber is connected to an insulating oil delivery pipe, the insulating oil delivery pipe is connected to a plurality of the high-voltage bushings, the insulating oil delivery pipe is connected to an oil delivery pipe, one end of the oil delivery pipe is connected to an oil tank joint, the other end of the oil delivery pipe is connected to an oil tank, and the oil tank joint is located at the top of the shell.
[0012] Furthermore, a transformer joint is provided on the surface of the oil tank, the transformer joint and the oil tank joint are fixedly connected through an oil pipeline, an oil tank pressure gauge and an oil level meter are provided on the surface of the oil tank, an insulating oil replenishing pipe is provided on the upper surface of the oil tank, and the oil tank is equipped with a second support frame.
[0013] Furthermore, the shell surface is provided with a high-pressure nitrogen supply port and a fire carbon dioxide supply port, and the high-pressure nitrogen supply port and the fire carbon dioxide supply port are equipped with a cover, the cover bolts are fixed to the shell surface, and the cover surface is provided with a handle.
[0014] Furthermore, the high-voltage bushing and the low-voltage bushing are connected to the winding via the high-voltage lead wire and the low-voltage lead wire, respectively.
[0015] Furthermore, an air drop switch is provided on the surface of the shell, a thermometer is provided on the surface of the shell, a control box and a fire control box are respectively installed at both ends of the shell, the fire control box monitors the internal pressure of the fire carbon dioxide tank and the high-pressure nitrogen tank, and the fire control box is electrically connected to the rotating nozzle, the control valve, the pressure relief manhole and the explosion relief valve; pressure sensors are provided inside the pressure relief manhole and the explosion relief valve, and signals are sent to the fire control box after the pressure relief manhole and the explosion relief valve are opened. The high-pressure nitrogen replenishing port, the fire carbon dioxide replenishing port, the air drop switch, the thermometer, the control box and the fire control box on the surface of the shell provide a transformation basis for the subsequent intelligent monitoring and control of the transformer; the fire control box can monitor the pressure in the tank in real time and control the opening and closing of related components, thereby improving the safety and reliability of the transformer.
[0016] Furthermore, a first support frame is installed at the bottom of the shell, and moving wheels are installed below the first support frame; the first support frame and the moving wheels installed at the bottom of the shell make it easier and more convenient to move or adjust the position of the transformer when it needs to be moved or adjusted.
[0017] Furthermore, the insulating oil replenishing pipe and other pipelines are made of insulating and heat-insulating materials; the insulating oil replenishing pipe and other pipelines are made of insulating and heat-insulating materials, which further improves the safety and stability of the transformer.
[0018] A method for using an oil-immersed high-voltage power supply transformer comprises the following steps:
[0019] S1. Oil filling and inspection: Insulate the second shell through the insulating oil filling pipe until the oil gauge on the surface of the oil tank reads normal. Check the transformer pressure gauge on the shell surface and the oil tank pressure gauge on the surface of the oil tank. At the same time, check the pressure of the high-pressure nitrogen tank and the fire-fighting carbon dioxide tank. After the pressure is normal, check whether the air drop switch is working properly. After confirmation, a professional will power it on.
[0020] S2, normal heat dissipation: The insulating oil inside the second shell is filled with the heat sink through the oil pipe. After the cooling fan at the bottom is started, the wind blown out passes through the gaps between the heat sinks. Since one side of the heat sink is uneven and the other side is smooth, a tiny wind vortex effect is formed between the heat sinks, which increases the wind flow rate, improves the heat dissipation efficiency, and maintains the transformer temperature stable.
[0021] When the transformer continues to work at a high load, the temperature of the insulating oil continues to rise. The insulating oil will volatilize flammable gas at high temperature to form bubbles. After the bubbles gather, they gradually move upward. Finally, due to the ignition of a tiny arc, a deflagration and fire occurs. The pressure relief manhole on the top of the second shell opens under the action of gas pressure, and the air drop switch falls to cut off the power to the transformer. At the same time, due to the incompressibility of the liquid, the insulating oil generates pressure downward, causing the explosion relief valve to open. The insulating oil flows out along the drain port under the action of gravity. At the moment of deflagration, the pressure sensor value continues to rise and eventually... The pressure of the manhole and explosion relief valve suddenly drops when they are opened, indicating that the pressure relief manhole and explosion relief valve are opened, so as to avoid the activation of the fire extinguishing components due to the simple pressure rise. After the pressure relief manhole and explosion relief valve are opened, a signal is transmitted to the fire control box, and the fire control box controls the control valve to open. The fire carbon dioxide tank sprays a large amount of carbon dioxide in the interlayer between the first shell and the second shell, cooling the shell and diluting the combustible gas at the same time to avoid secondary deflagration. The high-pressure nitrogen tank is opened, and nitrogen is sprayed into the second shell to accelerate the discharge of the insulating oil and cool the shell, while further diluting the combustible gas to avoid further expansion of the fire.
[0022] Compared with the prior art, the present invention has the following beneficial effects:
[0023] Two rows of oil pipes and multiple heat sinks are combined with cooling fans to effectively improve the heat dissipation efficiency. The different smoothness on both sides of the heat sink forms an air duct between the heat sinks. When the wind passes through, it will form a wind vortex effect, which accelerates the flow of wind and increases the heat dissipation efficiency. The first interlayer is equipped with a fire-fighting carbon dioxide tank and a high-pressure nitrogen tank, providing double safety protection and being able to respond quickly in case of overheating or fire. The pressure relief manhole, explosion relief valve and drain port design ensure the stability of the internal pressure of the transformer and facilitate maintenance.
[0024] The second shell adopts a semi-wrapped structure, which is easy to disassemble and install, reducing maintenance costs. The complete oil management system, including insulating oil delivery pipes, oil tanks and replenishing pipes, ensures smooth oil circulation and replenishment. Intelligent monitoring and control design, such as high-pressure nitrogen replenishment ports, fire-fighting carbon dioxide replenishment ports, thermometers and control boxes, improves safety and reliability.
[0025] In addition, a support frame and moving wheels are installed at the bottom of the transformer to facilitate movement and adjustment of position; the use of insulating and heat-insulating materials further improves safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0027] Figure 1 It is a structural schematic diagram of an oil-immersed high-voltage power supply transformer;
[0028] Figure 2 It is a schematic diagram of the fuel tank structure;
[0029] Figure 3 A is a schematic cross-sectional structure diagram of an oil-immersed high-voltage power supply transformer;
[0030] Figure 4 A schematic diagram B of a cross-sectional structure of an oil-immersed high-voltage power supply transformer;
[0031] Figure 5 It is a schematic diagram of the heat dissipation component structure;
[0032] Figure 6 A is a schematic diagram of the heat sink structure;
[0033] Figure 7 FIG. 1 is a schematic diagram of the heat sink structure B. FIG.
[0034] In the figure: 1, moving wheel; 2, shell; 201, first shell; 202, second shell; 3, cooling fan; 4, heat sink; 401, groove; 402, sleeve; 5, oil pipeline; 6, oil tank joint; 7, high-voltage bushing; 701, high-voltage lead; 702, heightening seat; 8, insulating oil delivery pipe; 9, low-voltage bushing; 901, low-voltage lead; 10, transformer pressure gauge; 11, fixing rod; 12, control box; 13, high-pressure nitrogen Refill port; 14. Fire carbon dioxide replenishment port; 15. First support frame; 16. Oil tank; 17. Transformer joint; 18. Oil tank pressure gauge; 19. Insulating oil replenishment pipe; 20. Oil gauge; 21. Second support frame; 22. Fire carbon dioxide tank; 2201. Rotating nozzle; 23. First winding; 24. Second winding; 25. Iron core; 26. Pressure relief manhole; 27. Drain port; 28. High-pressure nitrogen tank; 29. Fire control box. DETAILED DESCRIPTION
[0035] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0036] The application principle of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.
[0037] Example 1
[0038] like Figure 1-7 As shown; an oil-immersed high-voltage power supply transformer, comprising a shell 2, a plurality of high-voltage bushings 7 and a plurality of low-voltage bushings 9 are installed on the top of the shell 2, the shell 2 comprises a first shell 201 and a second shell 202, the second shell 202 is located inside the first shell 201, an interlayer is provided between the first shell 201 and the second shell 202, an oil chamber is provided inside the second shell 202, a transformer coil is installed inside the second shell 202, the second shell 202 is filled with insulating oil, the transformer coil comprises a first winding 23 and a second winding 24, an iron core 25 is provided between the first winding 23 and the second winding 24;
[0039] The shell 2 is provided with a first interlayer at the bottom, a fire-fighting carbon dioxide tank 22 is installed inside the first interlayer, a partition is provided at the nozzle of the fire-fighting carbon dioxide tank 22, the partition is fixedly connected to the shell 2, and a rotating nozzle 2201 and a control valve are provided at the nozzle of the fire-fighting carbon dioxide tank 22;
[0040] A pressure relief manhole 26 is provided at the top of the second housing 202. A high-pressure nitrogen tank 28 is installed at the top of the interlayer between the second housing 202 and the first housing 201. A control valve is installed at the mouth of the high-pressure nitrogen tank 28. One end of the control valve is connected to the mouth of the high-pressure nitrogen tank 28, and the other end of the control valve is connected to a spray pipe which extends into the interior of the second housing 202.
[0041] A liquid discharge port 27 is provided at the bottom of the housing 2. A rupture disc is provided at the upper opening of the liquid discharge port 27, and a magnetic dust-proof net is provided at the lower opening of the liquid discharge port 27. The opening pressures of the rupture disc and the pressure relief manhole 26 are different.
[0042] Two rows of oil pipelines 5 are installed on both sides of the housing 2. The two rows of oil pipelines 5 are arranged one above the other along the surface of the housing 2. Each row of oil pipelines 5 is evenly distributed along the surface of the housing 2. Heat dissipation fins 4 are installed between the adjacent upper and lower oil pipelines 5. There are multiple heat dissipation fins 4 which are evenly distributed on the surface of the oil pipeline 5 in a direction away from the housing 2. A cavity is provided inside the heat dissipation fin 4, and the cavity is communicated with the inside of the oil pipeline 5. A groove 401 is provided on one side surface of the heat dissipation fin 4, and the other side surface of the heat dissipation fin 4 is a smooth surface. Sleeve barrels 402 are provided at the upper and lower ends of the heat dissipation fin 4, and the sleeve barrels 402 are fitted with the oil pipeline 5. A heat dissipation fan 3 is installed below the heat dissipation fin 4. One end of the oil pipeline 5 away from the housing 2 is fitted with a fixing rod 11, and the fixing rod 11 connects the oil pipelines 5 in the same row.
[0043] The second housing 202 is a semi-wrapping structure. The cross-section of the second housing 202 is in a C shape. The opening of the C shape is connected to the bottom inner surface of the first housing 201. A connecting plate is fitted at the opening of the C shape. The connecting plate is fixedly connected to the bottom inner surface of the first housing 201. Chute grooves are provided around the connecting plate, and the edges of the opening of the C shape are fitted with the chute grooves. The second housing 202 and the connecting plate are alloy plates with different expansion values.
[0044] An oil chamber is provided inside the high-voltage bushing 7. A heightening seat 702 is installed at the bottom of the high-voltage bushing 7 to distinguish it from the low-voltage bushing 9. The oil chamber is connected to an insulating oil delivery pipe 8. The insulating oil delivery pipe 8 is connected to multiple high-voltage bushings 7. The insulating oil delivery pipe 8 is connected to an oil pipeline. One end of the oil pipeline is connected to an oil tank connector 6, and the other end of the oil pipeline is connected to an oil tank 16. The oil tank connector 6 is located at the top of the housing 2.
[0045] A transformer connector 17 is provided on the surface of the oil tank 16. The transformer connector 17 and the oil tank connector 6 are fixedly connected through the oil pipeline. An oil tank pressure gauge 18 and an oil quantity gauge 20 are provided on the surface of the oil tank 16. An insulating oil replenishing pipe 19 is provided on the upper surface of the oil tank 16. The oil tank 16 is fitted with a second support frame 21.
[0046] The shell 2 is provided with a high-pressure nitrogen supply port 13 and a fire-fighting carbon dioxide supply port 14 on its surface. The high-pressure nitrogen supply port 13 and the fire-fighting carbon dioxide supply port 14 are equipped with a cover. The cover is bolted to the shell 2 surface. A handle is provided on the cover surface.
[0047] The high-voltage bushing 7 and the low-voltage bushing 9 are connected to the windings via the high-voltage lead wire 701 and the low-voltage lead wire 901 respectively.
[0048] An air drop switch is provided on the surface of the shell 2, a thermometer is provided on the surface of the shell 2, a control box 12 and a fire control box 29 are respectively installed at both ends of the shell 2, the fire control box 29 monitors the internal pressure of the fire carbon dioxide tank 22 and the high-pressure nitrogen tank 28, and the fire control box 29 is electrically connected to the rotating nozzle 2201, the control valve, the pressure relief manhole 26 and the explosion relief valve.
[0049] A first support frame 15 is installed at the bottom of the housing 2 , and a moving wheel 1 is installed below the first support frame 15 .
[0050] The insulating oil replenishing pipe 19 and other pipelines are made of insulating and heat-insulating materials.
[0051] Example 2
[0052] A method for using an oil-immersed high-voltage power supply transformer; comprising the following steps:
[0053] S1. Oil filling and inspection: Insulating oil is injected into the second housing 202 through the insulating oil replenishing pipe 19 until the oil gauge 20 on the surface of the oil tank 16 reads normally, and the transformer pressure gauge 10 on the surface of the housing 2 and the oil tank pressure gauge 18 on the surface of the oil tank 16 are checked. At the same time, the pressure of the high-pressure nitrogen tank 28 and the fire-fighting carbon dioxide tank 22 are checked. After the pressure is normal, check whether the air drop switch is working normally. After confirmation, a professional will power it on;
[0054] S2, normal heat dissipation; the insulating oil inside the second housing 202 is filled with the heat sink 4 through the oil pipe 5. After the heat dissipation fan 3 at the bottom is started, the wind blown out passes through the gaps between the heat sinks 4. Since one side of the heat sink 4 is uneven and the other side is smooth, a tiny wind vortex effect is formed between the heat sinks 4, which increases the wind flow rate, improves the heat dissipation efficiency, and maintains the transformer temperature stable;
[0055] When the transformer continues to work at a high load, the temperature of the insulating oil continues to rise. The insulating oil will volatilize combustible gas at high temperature to form bubbles. After the bubbles gather, they gradually move upward. Finally, due to the ignition of a tiny arc, when an explosion occurs, the pressure relief manhole 26 on the top of the second shell 202 is opened under the action of gas pressure, and the air drop switch falls to cut off the power of the transformer. At the same time, due to the incompressibility of the liquid, the insulating oil generates pressure downward, causing the explosion relief valve to open. The insulating oil flows out along the drain port 27 under the action of gravity. After the pressure relief manhole 26 and the explosion relief valve are opened, a signal is transmitted to the fire control box 29. The fire control box 29 controls the control valve to open. The fire carbon dioxide tank 22 sprays a large amount of carbon dioxide in the interlayer between the first shell 201 and the second shell 202 to cool the shell and dilute the combustible gas at the same time to avoid secondary explosion. The high-pressure nitrogen tank 28 is opened to spray nitrogen into the second shell 202 to accelerate the discharge of the insulating oil and cool the shell, while further diluting the combustible gas to prevent the fire from further expanding.
Claims
1. An oil-immersed high-voltage power supply transformer, characterized in that: It includes a housing (2), on the top of which are installed a plurality of high-voltage bushings (7) and a plurality of low-voltage bushings (9). The housing (2) includes a first housing (201) and a second housing (202). The second housing (202) is located inside the first housing (201). A sandwich layer is provided between the first housing (201) and the second housing (202). An oil chamber is provided inside the second housing (202). A transformer coil is installed inside the second housing (202). The inside of the second housing (202) is filled with insulating oil. The transformer coil includes a first winding (23) and a second winding (24). A core (25) is provided between the first winding (23) and the second winding (24). A first sandwich layer is provided at the bottom of the housing (2). A fire-fighting carbon dioxide tank (22) is installed inside the first sandwich layer. A partition is provided at the nozzle of the fire-fighting carbon dioxide tank (22), and the partition is fixedly connected to the housing (2). A rotary nozzle (2201) and a control valve are provided at the nozzle of the fire-fighting carbon dioxide tank (22); A pressure relief manhole (26) is provided at the top of the second housing (202). A high-pressure nitrogen tank (28) is installed at the top of the sandwich layer between the second housing (202) and the first housing (201). A control valve is installed at the nozzle of the high-pressure nitrogen tank (28). One end of the control valve is connected to the nozzle of the high-pressure nitrogen tank (28), and the other end of the control valve is connected to a spray pipe which extends into the second housing (202).
2. The oil-immersed high-voltage power supply transformer according to claim 1, characterized in that: A drain port (27) is provided at the bottom of the housing (2). A rupture disc is provided at the upper opening of the drain port (27), and a magnetic dust-proof net is provided at the lower opening of the drain port (27). The opening pressures of the rupture disc and the pressure relief manhole (26) are different.
3. The oil-immersed high-voltage power supply transformer according to claim 1, characterized in that: Two rows of oil pipelines (5) are installed on both sides of the housing (2). The two rows of oil pipelines (5) are arranged one above the other along the surface of the housing (2). Each row of oil pipelines (5) is evenly distributed along the surface of the housing (2). Heat sinks (4) are installed between the adjacent upper and lower oil pipelines (5). There are a plurality of heat sinks (4), and the plurality of heat sinks (4) are evenly distributed on the surface of the oil pipeline (5) in a direction away from the housing (2). A cavity is provided inside the heat sink (4), and the cavity is communicated with the inside of the oil pipeline (5). A groove (401) is provided on one side surface of the heat sink (4), and the other side surface of the heat sink (4) is a smooth surface. A cooling fan (3) is installed below the heat sink (4).
4. The oil-immersed high-voltage power supply transformer according to claim 1, characterized in that: The second housing (202) is of a semi-enclosed structure. The cross-section of the second housing (202) is in a U shape. The opening of the U shape is connected to the bottom inner surface of the first housing (201). The opening of the U shape is fitted with a connecting plate which is fixedly connected to the bottom inner surface of the first housing (201). Chute grooves are provided around the connecting plate, and the edges of the opening of the U shape are fitted with the chute grooves. The second housing (202) and the connecting plate are alloy plates with different expansion values.
5. The oil-immersed high-voltage power supply transformer according to claim 1, characterized in that: An oil chamber is provided inside the high-voltage bushing (7), the oil chamber is connected to an insulating oil delivery pipe (8), the insulating oil delivery pipe (8) is connected to a plurality of the high-voltage bushings (7), the insulating oil delivery pipe (8) is connected to an oil delivery pipe, one end of the oil delivery pipe is connected to an oil tank joint (6), the other end of the oil delivery pipe is connected to an oil tank (16), and the oil tank joint (6) is located at the top of the housing (2).
6. The oil-immersed high-voltage power supply transformer according to claim 5, characterized in that: The surface of the oil tank (16) is provided with a transformer joint (17), the transformer joint (17) and the oil tank joint (6) are fixedly connected via an oil delivery pipe, the surface of the oil tank (16) is provided with an oil tank pressure gauge (18) and an oil level gauge (20), the upper surface of the oil tank (16) is provided with an insulating oil replenishing pipe (19), and the oil tank (16) is matched with a second support frame (21).
7. The oil-immersed high-voltage power supply transformer according to claim 1, characterized in that: The surface of the shell (2) is provided with a high-pressure nitrogen supply port (13) and a fire-fighting carbon dioxide supply port (14); the high-pressure nitrogen supply port (13) and the fire-fighting carbon dioxide supply port (14) are matched with a cover, the cover is bolted to the surface of the shell (2), and the cover surface is provided with a handle; the high-pressure bushing (7) and the low-pressure bushing (9) are respectively connected to the winding via a high-pressure lead wire (701) and a low-pressure lead wire (901).
8. The oil-immersed high-voltage power supply transformer according to claim 1, characterized in that: An air drop switch is arranged on the surface of the shell (2), a thermometer is arranged on the surface of the shell (2), a control box (12) and a fire control box (29) are respectively installed at both ends of the shell (2), the fire control box (29) monitors the internal pressure of the fire carbon dioxide tank (22) and the high-pressure nitrogen tank (28), the fire control box (29) is electrically connected to the rotating nozzle (2201), the control valve, the pressure relief manhole (26) and the explosion relief valve, and pressure sensors are arranged inside the pressure relief manhole (26) and the explosion relief valve.
9. The oil-immersed high-voltage power supply transformer according to claim 1, characterized in that: A first support frame (15) is installed at the bottom of the housing (2), and a moving wheel (1) is installed below the first support frame (15).
10. A method for using an oil-immersed high-voltage power supply transformer, characterized in that: The following steps are involved: S1. Oil filling and inspection: Insulating oil is injected into the second housing (202) through the insulating oil supply pipe (19) until the oil gauge (20) on the surface of the oil tank (16) reads normally, and the transformer pressure gauge (10) on the surface of the housing (2) and the oil tank pressure gauge (18) on the surface of the oil tank (16) are checked. At the same time, the pressures of the high-pressure nitrogen tank (28) and the fire-fighting carbon dioxide tank (22) are checked. When the pressures are normal, check whether the air drop switch is working properly. After confirmation, a professional will power on the switch. S2, normal heat dissipation; the insulating oil inside the second housing (202) is filled into the heat sink (4) through the oil pipe (5), and after the heat dissipation fan (3) at the bottom is started, the wind blown out passes through the gaps between the heat sinks (4). Since one side of the heat sink (4) is uneven and the other side is smooth, a tiny wind vortex effect is formed between the heat sinks (4), which increases the wind flow rate, improves the heat dissipation efficiency, and maintains a stable temperature of the transformer; When the transformer continues to work at a high load, the temperature of the insulating oil continues to rise. The insulating oil will volatilize combustible gas at high temperature to form bubbles. After the bubbles gather, they gradually move upward. Finally, due to the ignition of a tiny arc, a deflagration occurs. The pressure relief manhole (26) on the top of the second shell (202) opens under the action of gas pressure, and the air drop switch drops to cut off the transformer. At the same time, due to the incompressibility of the liquid, the insulating oil generates pressure downward, causing the explosion relief valve to open. The insulating oil flows out along the drain port (27) under the action of gravity. After the pressure relief manhole (26) and the explosion relief valve are opened, the internal pressure sensor transmits a signal to the fire control box (29). The fire control box (29) controls the control valve to open. The fire carbon dioxide tank (22) sprays a large amount of carbon dioxide in the interlayer between the first shell (201) and the second shell (202), cooling the shell and diluting the combustible gas at the same time. The high-pressure nitrogen tank (28) opens and sprays nitrogen into the second shell (202) to accelerate the discharge of the insulating oil and further dilute the combustible gas to prevent the fire from further spreading.