Transformer safety protection device

Abstract

The invention belongs to the technical field of transformer protection, and particularly discloses a transformer safety protection device. A trigger valve body is arranged on the main body; the isolation shell is arranged outside the main body, and a blocking area is formed between the isolation shell and the main body; the connecting rod frame is slidably arranged in the blocking area; the explosion suppressant storage tank is arranged on the inner wall of the isolation shell; and the trigger valve body is arranged to trigger the connecting rod frame to open the explosion suppressant storage tank when the air pressure in the main body rises. When air pressure rises due to electric arcs, short circuits and the like generated in the transformer due to faults, the trigger valve body is pushed by the internal air pressure to act, then the connecting rod frame is driven to slide in the blocking area, the releasing mechanism of the explosion suppressant storage tank is triggered in the movement process of the connecting rod frame, the explosion suppressant is rapidly sprayed to the main body, and suppression of initial faults is achieved. According to the protection device, active protection is achieved through air pressure triggering, faults are restrained in the germination stage, and meanwhile high-temperature oil gas generated by the faults can be preliminarily isolated through an isolation area formed by the isolation shell and the main body.

Description

Technical Field

[0001] This application relates to the field of transformer protection technology, and in particular to a transformer safety protection device. Background Technology

[0002] Transformers are key equipment in power systems used to change AC voltage. They achieve efficient transmission and distribution of electrical energy through the principle of electromagnetic induction. They have many advantages such as strong short-circuit resistance, low noise, stable performance, small size, high operating efficiency, and low maintenance costs. They are commonly used in various places such as urban power grids, railways, ports, tunnels, mines, power plants, factories, residential areas, and business centers. The protective structure design of transformers is designed to ensure their safe operation, extend their service life, and adapt to different installation environments.

[0003] Existing transformer safety protection largely relies on internal electrical protection (such as gas relays and differential protection) and main auxiliary devices (such as pressure relief valves). While these measures are effective, they have limitations: Passivity: When the pressure relief valve releases pressure, the high-temperature oil-gas mixture is already ejected, which can easily cause a secondary fire or explosion.

[0004] Isolation: Each protection unit operates independently, lacking a systematic linkage mechanism, making it impossible to contain faults in their infancy.

[0005] Secondary damage: After the malfunction occurred, only the pressure was released, without isolating or suppressing the ejected flames and high-temperature oil. Summary of the Invention

[0006] The purpose of this application is to provide a transformer safety protection device to solve the above-mentioned problems.

[0007] To achieve the above objectives, the technical solution of this application is as follows: A transformer safety protection device, comprising: Main body; the main body is provided with a trigger valve body; An isolation shell is disposed outside the main body, and a barrier area is formed between the isolation shell and the main body; The linkage is slidably disposed in the barrier area; An explosion suppressant storage tank, wherein the explosion suppressant is located on the inner wall of the isolation shell; The trigger valve is configured to trigger the linkage to open the explosion suppressant storage tank when the internal air pressure of the main body increases.

[0008] Preferably, the trigger valve body includes a valve port, a valve plug, a preload spring, and a valve stem; the valve plug has a wide opening, the preload spring is sleeved on the valve stem, and the bottom of the valve stem is connected to the side of the valve plug facing away from the interior of the main body; When the internal air pressure of the main body increases, the valve plug overcomes the preload force of the preload spring and moves upward, simultaneously driving the valve stem to extend out of the main body.

[0009] Preferably, the linkage includes a trigger plate and a sliding rod; the explosion suppressant storage tank includes a first rupture diaphragm storage tank disposed on the side wall of the isolation shell and a second rupture diaphragm storage tank disposed on the top of the isolation shell; A support frame is provided on the side wall of the main body corresponding to the first rupture diaphragm storage tank. A first needle is elastically slidably provided on the support frame. A trigger protrusion is provided on the sliding rod frame for abutting the first needle and sliding towards the first rupture diaphragm storage tank. A second needle is provided on the trigger plate towards the second rupture diaphragm storage tank.

[0010] Preferably, the support frame is provided with a sliding hole, the first needle is slidably disposed in the sliding hole, the first needle is provided with a baffle, a first spring is provided between the baffle and the support frame, and the support frame is also provided with a limiting plate for limiting the first needle.

[0011] Preferably, the top of the isolation shell is provided with an explosion relief pipe, which extends upward and then bends downward; the explosion relief pipe is provided with a buffer plate, which includes two layers of angle steel arranged with multiple angle steels spaced apart, and the angle steels in the two layers of angle steels are staggered vertically; the edges of the angle steels in the layers of angle steels are arranged upward.

[0012] Preferably, the isolation shell is provided with a plurality of heat exchange tubes, the bottom of the heat exchange tubes is located inside the barrier zone, the top of the heat exchange tubes is located outside the heat exchange tubes, and the heat exchange tubes are provided with a heat exchange liquid working fluid.

[0013] Preferably, it also includes a protective component, which is disposed above the isolation shell. The protective component includes two protective plates that are hinged to each other and have an inverted V structure. Each of the protective plates is equipped with an anti-gravel retention rolling belt, which is sleeved in two rotatably mounted rotating rollers. The protective assembly further includes a fixed rod and an arc-shaped guide rod disposed on the fixed rod. The protective plate is provided with a guide hole that slides with the arc-shaped guide rod, and a second spring is sleeved on the arc-shaped guide rod. The protective components are mounted on the frame on which the main body is mounted.

[0014] Preferably, the bottom of the isolation shell is provided with a hinged cover plate, and the isolation shell is provided with a resistance wire to support the hinged cover plate to open downward; the isolation shell is provided with a thermoelectric generator, the heat sensing end of the thermoelectric generator is attached to the inner wall of the main body, the cold sensing end of the thermoelectric generator is located outside the isolation shell, and the heat sensing end and the cold sensing end are respectively electrically connected to the resistance wire.

[0015] Preferably, the upper part of the isolation shell is provided with a wire hole.

[0016] Preferably, the outer wall of the isolation shell is provided with a heat dissipation plate.

[0017] The transformer safety protection device disclosed in this application, when an internal fault such as an electric arc or short circuit causes an increase in gas pressure, triggers a valve body that is actuated by the internal gas pressure. This actuates the connecting rod frame, causing it to slide within the isolation zone. During the movement of the connecting rod frame, the release mechanism of the explosion suppressant tank is triggered, allowing the explosion suppressant to be rapidly sprayed onto the main body, thus suppressing the initial fault. This protection device breaks away from the passive nature of traditional protection, achieving active protection through gas pressure triggering, containing the fault at its nascent stage. Simultaneously, the isolation zone formed by the isolation shell and the main body can initially isolate the high-temperature oil and gas generated by the fault, reducing the risk of secondary injury. Attached Figure Description

[0018] Figure 1 This is the main view of the overall structure of this application; Figure 2 This is a right view of the overall structure of this application; Figure 3 This is a three-dimensional view of the overall structure of this application; Figure 4 This is a top view of the overall structure of this application; Figure 5 for Figure 4 Sectional view of section AA; Figure 6 for Figure 5 Enlarged view of a portion of point A in the middle; Figure 7 for Figure 4 3D diagram; Figure 8 for Figure 7 Enlarged view of a portion of point B in the middle; Figure 9 for Figure 7 Enlarged view of a portion of point C in the middle; Figure 10 for Figure 4 Sectional view of section BB; Figure 11 This is another perspective view of the overall structure of this application; Figure 12 for Figure 11Enlarged view of a portion of point D; Figure 13 for Figure 11 Enlarged view of a portion of point E in the middle; Figure 14 This is a schematic diagram of the trigger valve body structure in this application; Figure 15 This is a schematic diagram of the buffer plate structure in this application; Figure 16 This is a top view of the buffer plate; Figure 17 for Figure 16 Sectional view of the CC section.

[0019] In the picture: 1. Main body; 10. First rupture diaphragm storage tank; 100. Barrier zone; 11. Second rupture diaphragm storage tank; 12. Second spike; 13. Linkage frame; 130. Trigger plate; 131. Sliding rod frame; 132. Trigger protrusion; 14. First spike; 15. First spring; 150. Baffle; 16. Limiting plate; 17. Support frame; 2. Isolation shell; 20. Explosion relief pipe; 21. Heat dissipation plate; 22. 23. Threading hole; 23. Trigger valve body; 230. Valve port; 231. Valve stem; 232. Preload spring; 233. Valve plug; 24. Hinge cover plate; 3. Protective components; 30. Protective plate; 31. Anti-gravel rolling belt; 32. Rotating roller; 33. Fixing rod; 34. Arc-shaped guide rod; 35. Guide hole; 4. Heat exchange tube; 5. Thermoelectric generator; 50. Resistance wire; 6. Buffer plate; 60. Angle steel layer. Detailed Implementation

[0020] The present application will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, illustrating only the basic structure of the present application, and therefore only show the components relevant to the present application.

[0021] like Figures 1-17 As shown, a transformer safety protection device includes: a main body 1; a trigger valve body 23 is provided on the main body 1; An isolation shell 2 is disposed outside the main body 1, forming a barrier zone 100 between the isolation shell 2 and the main body 1; a linkage 13 is slidably disposed in the barrier zone 100; a detonator storage tank is disposed on the inner wall of the isolation shell 2; a trigger valve 23 is disposed so that it can trigger the linkage 13 to open the detonator storage tank when the internal air pressure of the main body 1 increases.

[0022] The main body 1 of the transformer safety protection device is the core shell of the transformer, which is used to house key components such as the transformer core and windings. The trigger valve body 23 is installed on the side wall or top of the main body 1 and is connected to the interior of the main body 1, which can sense the air pressure changes inside the main body 1 in real time.

[0023] The isolation shell 2 has a box-shaped structure that fits the main body 1. It is fitted onto the outside of the main body 1, with a 10-15 cm gap between them to form a barrier area 100. This barrier area 100 can effectively block the direct influence of the external environment on the main body 1, while providing space for the installation and movement of the linkage frame 13.

[0024] The linkage 13 is slidably set in the isolation zone 100 via a slide rail, with one end corresponding to the trigger valve body 23 and the other end corresponding to the explosion suppressant storage tank.

[0025] The explosion suppressant storage tank is filled with liquid explosion suppressant and is fixedly installed on the inner wall of the isolation shell 2, with the outlet end of the explosion suppressant storage tank facing the main body 1.

[0026] When an internal fault in the transformer causes an arc or short circuit, leading to a rise in gas pressure, the trigger valve 23 is activated by the internal gas pressure. This, in turn, causes the connecting rod 13 to slide within the isolation zone 100. During the movement of the connecting rod 13, the release mechanism of the explosion suppressant tank is triggered, causing the explosion suppressant to be rapidly sprayed onto the main body 1, thus suppressing the initial fault. This protective device breaks away from the passive nature of traditional protection, achieving active protection through gas pressure triggering, containing the fault at its nascent stage. At the same time, the isolation zone 100 formed by the isolation shell 2 and the main body 1 can initially isolate the high-temperature oil and gas generated by the fault, reducing the risk of secondary damage.

[0027] In some further embodiments, the trigger valve body 23 includes a valve port 230, a valve plug 233, a preload spring 232, and a valve stem 231; the valve plug 233 is wide-mouthed, the preload spring 232 is sleeved on the valve stem 231, and the bottom of the valve stem 231 is connected to the side of the valve plug 233 facing away from the inside of the main body 1; when the air pressure inside the main body 1 increases, the valve plug 233 moves upward against the preload force of the preload spring 232, simultaneously driving the valve stem 231 to extend out of the outside of the main body 1.

[0028] The valve port 230 of the trigger valve body 23 is opened on the upper wall of the main body 1 and communicates with the interior of the main body 1. The valve plug 233 adopts a wide-mouth conical structure, and its diameter is slightly larger than the diameter of the valve port 230, which can tightly fit the valve port 230 to achieve a seal.

[0029] The valve stem 231 is a cylindrical metal rod, and its bottom is fixed to the center of the side of the valve plug 233 facing away from the interior of the main body 1 by means of threaded connection or welding.

[0030] The preload spring 232 is sleeved on the valve stem 231, with one end of the spring abutting against the side of the valve plug 233 and the other end abutting against the inner wall of the valve body.

[0031] When the internal air pressure of the main body 1 is within the normal range, the elastic force of the preload spring 232 causes the valve plug 233 to tightly seal the valve port 230. When the internal air pressure of the main body 1 rises due to a fault, and the thrust generated by the air pressure exceeds the preload force of the preload spring 232, the valve plug 233 is pushed upward, simultaneously causing the valve stem 231 to extend out of the main body 1. This trigger valve body 23 has a simple structure and sensitive response. The trigger threshold can be flexibly adjusted by setting the elastic force of the preload spring 232, ensuring that subsequent protective actions can be triggered in a timely manner in the early stage of a fault, preventing the fault from further escalating.

[0032] In some further embodiments, the linkage 13 includes a trigger plate 130 and a sliding rod 131; the explosion suppressant storage tank includes a first rupture diaphragm storage tank 10 disposed on the side wall of the isolation shell 2 and a second rupture diaphragm storage tank 11 disposed on the top of the isolation shell 2; a support frame 17 is provided on the side wall of the main body 1 corresponding to the first rupture diaphragm storage tank 10, a first needle 14 is elastically slidably disposed on the support frame 17, and a trigger protrusion 132 is provided on the sliding rod 131 for abutting against the first needle 14 and sliding toward the first rupture diaphragm storage tank 10; a second needle 12 is disposed on the trigger plate 130 toward the second rupture diaphragm storage tank 11.

[0033] The trigger plate 130 of the linkage frame 13 is a rectangular plate. The trigger plate 130 is located above the end of the valve stem 231 that extends outside the main body 1, and can move upward synchronously under the action of the valve stem 231. The sliding rod frame 131 is a rod-shaped structure. One end is fixedly connected to the trigger plate 130, and the other end is slidably set in the isolation area 100 through the slide rail.

[0034] The first rupture diaphragm storage tank 10 of the explosion suppressant storage tank is cylindrical and fixedly installed on the side wall of the isolation shell 2. Its end facing the main body 1 is provided with an easily ruptured diaphragm. The second rupture diaphragm storage tank 11 is also cylindrical and fixedly installed on the top of the isolation shell 2. Its end facing the main body 1 is also provided with a rupture diaphragm.

[0035] A support frame 17 is welded to the side wall of the main body 1 at the position corresponding to the first bursting diaphragm storage tank 10. A first needle 14 is elastically arranged on the support frame 17 through a sliding structure. The tip of the first needle 14 faces the bursting diaphragm of the first bursting diaphragm storage tank 10. A trigger protrusion 132 is integrally formed on the sliding rod frame 131 at the position corresponding to the first needle 14. When the sliding rod frame 131 slides upward, the trigger protrusion 132 can gradually abut against the first needle 14 and push it to slide towards the first bursting diaphragm storage tank 10.

[0036] A second needle 12 is fixed on the side of the trigger plate 130 facing the second rupture diaphragm storage tank 11, and the tip of the second needle 12 is aligned with the rupture diaphragm of the second rupture diaphragm storage tank 11.

[0037] When the trigger plate 130 moves upward with the valve stem 231, it drives the trigger protrusion 132 on the sliding rod frame 131 to push the first piercing needle 14 to pierce the rupture diaphragm of the first rupture diaphragm storage tank 10. At the same time, the second piercing needle 12 on the trigger plate 130 directly pierces the rupture diaphragm of the second rupture diaphragm storage tank 11, causing the explosion suppressant to be sprayed onto the main body 1 from both directions simultaneously. This multi-directional explosion suppressant release design ensures that the explosion suppressant evenly covers the main body 1, comprehensively suppressing fault flames and high temperatures. Compared with single-directional release, the protection effect is more comprehensive and reliable.

[0038] In some further embodiments, the support frame 17 is provided with a sliding hole, the first needle 14 is slidably disposed in the sliding hole, the first needle 14 is provided with a baffle 150, a first spring 15 is provided between the baffle 150 and the support frame 17, and the support frame 17 is also provided with a limiting plate 16 for limiting the first needle 14.

[0039] The support frame 17 has a sliding hole along the movement direction of the first needle 14. The diameter of the sliding hole is adapted to the diameter of the first needle 14, and the first needle 14 slides through the sliding hole.

[0040] A circular baffle 150 is welded to the first needle 14 at a position between the support frame 17 and the tip of the distal needle. The diameter of the baffle 150 is larger than the diameter of the sliding hole. A first spring 15 is sleeved on the first needle 14 and located between the baffle 150 and the support frame 17. One end of the first spring 15 abuts against the baffle 150, and the other end abuts against the support frame 17.

[0041] A limiting plate 16 is welded on the support frame 17 near the tail of the first needle 14. The limiting plate 16 is an L-shaped metal plate with its bent part extending toward the side of the baffle 150 away from the needle tip, which is used to limit the maximum retraction position of the first needle 14.

[0042] When the trigger protrusion 132 pushes the first needle 14 forward to puncture the rupture diaphragm, and the trigger protrusion 132 returns to its original position along with the sliding rod 131, the elastic force of the first spring 15 pushes the baffle 150 to retract the first needle 14 backward until the baffle 150 abuts against the limiting plate 16, thus restoring the first needle 14 to its initial position. This elastic sliding structure gives the first needle 14 an automatic reset function, facilitating reset maintenance after a single fault and allowing for reuse, thus reducing maintenance costs. Simultaneously, the limiting plate 16 prevents the first needle 14 from excessively retracting and causing positional deviation, ensuring accurate alignment with the rupture diaphragm during the next trigger.

[0043] The first rupture diaphragm storage tank 10 and the second rupture diaphragm storage tank 11 are widely used in the field of industrial protection and are existing technologies. Their specific structures will not be described in detail in this embodiment.

[0044] In some further embodiments, the top of the isolation shell 2 is provided with an explosion relief pipe 20, which extends upward and then bends downward; the explosion relief pipe 20 is provided with a buffer plate 6, which includes two layers of angle steel 60 arranged with multiple angle steels spaced apart, and the angle steels in the two layers of angle steel 60 are arranged vertically and horizontally in a staggered manner; the edges of the angle steels in the layers of angle steel 60 are arranged facing upward.

[0045] An explosion relief pipe 20 is welded to the top center of the isolation shell 2. The explosion relief pipe 20 is made of metal pipe. One end of it is connected to the isolation zone 100 inside the isolation shell 2, and the other end extends upwards by 0.3 to 0.5 meters and then bends downwards.

[0046] The explosion relief pipe 20 has a buffer plate 6 welded inside. The buffer plate 6 consists of two layers of angle steel 60. Each layer of angle steel 60 is made up of multiple angle steels arranged at equal intervals welded to a metal frame. The two layers of angle steel 60 are set up one above the other, and the angle steels in the upper layer of angle steel 60 are staggered with the angle steels in the lower layer of angle steel 60. At the same time, the edges of the angle steels in each layer of angle steel 60 are all set upward.

[0047] When the high-temperature, high-pressure gas generated by an internal malfunction in the main body 1 breaks through the trigger valve body 23, it enters the isolation zone 100. Some of the gas can be discharged through the explosion relief pipe 20. When passing through the buffer plate 6, the vertically offset angle steel with its edges facing upwards can block, divert, and buffer the airflow, reducing the gas velocity and pressure, and preventing high-speed, high-pressure gas from being directly discharged and causing secondary danger. At the same time, the downward-bending pipe outlet can prevent rainwater, debris, etc., from entering the explosion relief pipe 20, ensuring the pipe is unobstructed. This explosion relief structure not only achieves safe explosion relief but also further reduces the risk of secondary injury through buffer design.

[0048] In some further embodiments, the isolation shell 2 is provided with a plurality of heat exchange tubes 4, the bottom of the heat exchange tubes 4 being located inside the barrier zone 100 and the top being located outside the heat exchange tubes 4, and the heat exchange tubes 4 being provided with a heat exchange liquid working fluid.

[0049] Multiple heat exchange tubes 4 are evenly distributed on the side wall of the isolation shell 2. The heat exchange tubes 4 are made of copper or aluminum alloy tubing with good thermal conductivity. The bottom of the heat exchange tube 4 extends through the side wall of the isolation shell 2 into the interior of the barrier zone 100 and the bottom port is closed. The top extends through the side wall of the isolation shell 2 into the exterior of the isolation shell 2 and the top port is also closed.

[0050] The heat exchange tube 4 is filled with a liquid working fluid, such as high-performance electronic fluorinated liquids like FC-72 and Novec 7100, which are insulating, non-flammable, and chemically inert. During normal transformer operation, the heat generated by the main body 1 is transferred to the isolation zone 100, causing the liquid working fluid inside the heat exchange tube 4 to evaporate. The vapor rises to the top of the heat exchange tube 4, exchanges heat with the outside air, condenses back into liquid, and then flows back to the bottom of the heat exchange tube 4, thus achieving heat dissipation through this cycle. This heat exchange structure requires no additional power, relying on the phase change of the working fluid to achieve efficient heat dissipation. It effectively reduces the operating temperature of the main body 1, extends the service life of the transformer, and avoids the noise and energy consumption problems associated with traditional fan cooling.

[0051] In other embodiments, to increase heat exchange efficiency, hollow condenser fins can be connected to the outer end of the heat exchange tube 4 to facilitate heat exchange with the outside.

[0052] In some further embodiments, a protective component 3 is also included, which is disposed above the isolation shell 2. The protective component 3 includes two protective plates 30 that are hinged to each other and have an inverted V structure. A stone-retention anti-gravel rolling belt 31 is mounted above each of the protective plates 30, and the stone-retention anti-gravel rolling belt 31 is sleeved in two rotating rollers 32.

[0053] The protective assembly 3 also includes a fixed rod 33 and an arc-shaped guide rod 34 disposed on the fixed rod 33. The protective plate 30 is provided with a guide hole 35 that slides with the arc-shaped guide rod 34, and a second spring is sleeved on the arc-shaped guide rod 34.

[0054] The protective component 3 is installed on the frame of the main body 1.

[0055] The protective component 3 is positioned directly above the isolation shell 2 and is mounted on a concrete column or steel frame that supports the main body 1.

[0056] Both protective plates 30 are rectangular structural plates, which are hinged to each other to form an inverted V structure, and their bottoms are connected to the frame through brackets.

[0057] The anti-gravel rolling belt 31 is made of rubber with a smooth surface and is fitted inside two rotating rollers 32. The rotating rollers 32 are mounted on the upper edge of the protective plate 30 via bearings. The fixing rod 33 is vertically welded to the joint of the two protective plates 30 in the frame. The middle part of the arc-shaped guide rod 34 is welded to the top of the fixing rod 33, and both ends extend in an arc shape to the bottom of the protective plate 30. The protective plate 30 has guide holes 35 corresponding to the positions of the arc-shaped guide rod 34. The arc-shaped guide rod 34 slides through the guide holes 35. The second spring is fitted on the arc-shaped guide rod 34 and is located between the fixing rod 33 and the protective plate 30. When encountering heavy rain, hail, or falling debris, the inverted V-shaped protective plate 30 can shield and protect the isolation shell 2. When falling debris lands on the anti-debris retention rolling belt 31, it will cause the anti-debris retention rolling belt 31 to rotate, causing the debris to slide off the rolling belt and preventing debris from accumulating and damaging the protective plate 30. When subjected to a large impact, the protective plate 30 can slide along the arc-shaped guide rod 34, compressing the second spring. The elasticity of the second spring buffers the impact force, further improving the protective effect. This protective component 3 can effectively resist the impact of falling objects, providing all-round top protection for the isolation shell 2 and the main body 1.

[0058] It should be noted that the elasticity of the second spring is sufficient to stably support the protective plate 30 and keep it in a stable state. Under the impact of gravel, the protective plate 30 will not move back and forth and thus affect its stability.

[0059] The two protective plates 30 are hinged together on a connecting shaft, and a limiting component for the protective plates 30 is also provided on the connecting shaft to prevent the protective plates 30 from excessively flipping upward under the action of the second spring.

[0060] In some further embodiments, the bottom of the isolation shell 2 is provided with a hinged cover plate 24, and the isolation shell 2 is provided with a resistance wire 50 that supports the hinged cover plate 24 to open downward; the isolation shell 2 is provided with a thermoelectric generator 5, the heat sensing end of the thermoelectric generator 5 is attached to the inner wall of the main body 1, the cold sensing end of the thermoelectric generator 5 is located outside the isolation shell 2, and the heat sensing end and the cold sensing end are respectively electrically connected to the resistance wire 50.

[0061] A hinged cover plate 24 is hinged to one side of the bottom of the isolation shell 2. The size of the hinged cover plate 24 is adapted to the opening at the bottom of the isolation shell 2 and can completely cover the opening.

[0062] A resistance wire 50 is fixed on the inner wall of the isolation shell 2 at the free end position corresponding to the hinged cover plate 24. The resistance wire 50 is in contact with the bottom wall of the hinged cover plate 24 and is used to heat up and melt the connection when energized or to directly heat up the hinged cover plate 24 to make it lose support and open downward.

[0063] The thermoelectric generator 5 is made of semiconductor thermoelectric material. Its heat-sensing end is attached to the inner wall of the main body 1 through thermally conductive silicone to sense the temperature of the main body 1, while the cold-sensing end extends to the outside of the isolation shell 2 and comes into contact with the air. The output end of the thermoelectric generator 5 is electrically connected to the resistance wire 50 through wires to form a closed circuit. When a fault occurs inside the main body 1, causing the temperature to rise sharply, a large temperature difference is formed between the inner wall of the main body 1 and the outside air. The thermoelectric generator 5 generates current, which energizes the resistance wire 50 and heats it up. This causes the hinged cover 24 to open downwards, and the bottom opening of the isolation shell 2 to open, allowing the high-temperature gas and liquid in the isolation zone 100 to be discharged in time, preventing excessive internal pressure from causing an explosion. At the same time, this structure does not require an external power source, relying on thermoelectric power generation to achieve automatic control, which is timely, energy-saving, and environmentally friendly.

[0064] Before the hinged cover 24 is opened, the anti-explosive agent expanding in the barrier zone 100 cannot fall out of the barrier zone 100.

[0065] In some further embodiments, the isolation shell 2 is provided with a wire hole 22 on its upper part.

[0066] Multiple wire-passing holes 22, each 5-10 cm in diameter, are provided on the upper side wall of the isolation housing 2, and each hole is fitted with a rubber sealing ring. Transformer leads, control lines, etc., can pass through these holes 22 to exit the isolation housing 2. The rubber sealing ring tightly wraps around the cables, providing sealing and insulation, preventing external rainwater and dust from entering the isolation housing 2 through the holes 22, and also preventing damage caused by friction between the cables and the edges of the holes 22. The wire-passing holes 22 facilitate the arrangement of transformer cables and ensure the sealing of the isolation housing 2 and the safety of the cables.

[0067] In some further embodiments, the outer wall of the isolation shell 2 is provided with a heat dissipation plate 21.

[0068] Multiple heat dissipation plates 21 are fixed on the outer wall of the isolation shell 2. The heat dissipation plates 21 are made of aluminum alloy and have a sheet-like structure. Multiple heat dissipation fins are provided on their surface.

[0069] The heat sink 21 is tightly fitted to the outer wall of the isolation shell 2, enabling it to quickly dissipate heat transferred from the inside of the isolation shell 2 to the outer wall into the air. Together with the heat exchange pipe 4, it forms a dual heat dissipation system, further enhancing the heat dissipation effect and ensuring the transformer can operate normally even in high-temperature environments. Simultaneously, the aluminum alloy heat sink 21 is lightweight, corrosion-resistant, and has a long service life. Furthermore, the design of the heat dissipation fins increases the heat dissipation area and improves heat dissipation efficiency.

[0070] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this application.

Claims

1. A transformer safety protection device, characterized in that, include: Main body (1); The main body (1) is provided with a trigger valve body (23); An isolation shell (2) is disposed outside the main body (1), and a barrier area (100) is formed between the isolation shell (2) and the main body (1). The linkage (13) is slidably disposed in the barrier area (100); An explosion suppressant storage tank, wherein the explosion suppressant is located on the inner wall of the isolation shell (2); The trigger valve (23) is configured to trigger the linkage (13) to open the explosion suppressant tank when the internal air pressure of the main body (1) increases.

2. The transformer safety protection device according to claim 1, characterized in that, The trigger valve body (23) includes a valve port (230), a valve plug (233), a preload spring (232), and a valve stem (231); the valve plug (233) is wide-mouthed, the preload spring (232) is sleeved on the valve stem (231), and the bottom of the valve stem (231) is connected to the side of the valve plug (233) facing away from the interior of the main body (1); When the internal air pressure of the main body (1) increases, the valve plug (233) overcomes the pre-tightening force of the pre-tightening spring (232) and moves upward, simultaneously driving the valve stem (231) to extend out of the main body (1).

3. The transformer safety protection device according to claim 2, characterized in that, The linkage (13) includes a trigger plate (130) and a sliding rod (131); the explosion suppressant storage tank includes a first rupture diaphragm storage tank (10) disposed on the side wall of the isolation shell (2) and a second rupture diaphragm storage tank (11) disposed on the top of the isolation shell (2). A support frame (17) is provided on the side wall of the main body (1) corresponding to the first rupture diaphragm storage tank (10). A first needle (14) is elastically slidably provided on the support frame (17). A trigger protrusion (132) is provided on the sliding rod frame (131) for abutting the first needle (14) and sliding towards the first rupture diaphragm storage tank (10). A second needle (12) is provided on the trigger plate (130) towards the second rupture diaphragm storage tank (11).

4. The transformer safety protection device according to claim 3, characterized in that, The support frame (17) is provided with a sliding hole, the first needle (14) is slidably disposed in the sliding hole, the first needle (14) is provided with a baffle (150), a first spring (15) is provided between the baffle (150) and the support frame (17), and the support frame (17) is also provided with a limiting plate (16) for limiting the first needle (14).

5. The transformer safety protection device according to claim 1, characterized in that, The top of the isolation shell (2) is provided with an explosion relief pipe (20), which extends upward and then bends downward; the explosion relief pipe (20) is provided with a buffer plate (6), which includes two layers of angle steel (60) arranged with multiple angle steels spaced apart, and the angle steels in the two layers of angle steel (60) are arranged vertically and horizontally in a staggered manner; the edges of the angle steels in the layers of angle steel (60) are set upward.

6. The transformer safety protection device according to claim 1, characterized in that, The isolation shell (2) is provided with a plurality of heat exchange tubes (4). The bottom of the heat exchange tubes (4) is located inside the barrier zone (100), and the top is located outside the heat exchange tubes (4). The heat exchange tubes (4) are provided with a heat exchange liquid working medium inside.

7. The transformer safety protection device according to claim 1, characterized in that, It also includes a protective component (3), which is disposed above the isolation shell (2). The protective component (3) includes two protective plates (30) that are hinged to each other and have an inverted V structure. A stone-retention rolling belt (31) is mounted above each of the protective plates (30). The stone-retention rolling belt (31) is sleeved in two rotating rollers (32). The protective assembly (3) further includes a fixed rod (33) and an arc-shaped guide rod (34) disposed on the fixed rod (33). The protective plate (30) is provided with a guide hole (35) that slides with the arc-shaped guide rod (34). A second spring is sleeved on the arc-shaped guide rod (34). The protective component (3) is mounted on the frame on which the main body (1) is mounted.

8. The transformer safety protection device according to claim 1, characterized in that, The bottom of the isolation shell (2) is provided with a hinged cover plate (24), and the isolation shell (2) is provided with a resistance wire (50) to support the hinged cover plate (24) to open downwards; the isolation shell (2) is provided with a thermoelectric generator (5), the heat sensing end of the thermoelectric generator (5) is attached to the inner wall of the main body (1), the cold sensing end of the thermoelectric generator (5) is located outside the isolation shell (2), and the heat sensing end and the cold sensing end are respectively electrically connected to the resistance wire (50).

9. The transformer safety protection device according to claim 1, characterized in that, The isolation shell (2) is provided with a wire hole (22) on its upper part.

10. The transformer safety protection device according to claim 1, characterized in that, The outer wall of the isolation shell (2) is provided with a heat dissipation plate (21).

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