A high-capacity low-loss green transformer using high-temperature superconducting wire sets

Abstract

The application discloses a high-capacity low-loss green transformer adopting a high-temperature superconducting wire group, relates to the technical field of transformers, and is characterized in that support frames are installed at four corner positions on the top of a protection inner box, three butt joints are connected to the top of two support frames located on the same side through a plurality of ceramic slide rods, the butt joints are embedded in the middle of two opposite butt sleeves, a plurality of rectangular water pipes are connected inside an air inlet frame and an air outlet frame, and water passing boxes are connected to the two ends of the rectangular water pipes. When a fire occurs, the heat dissipation and fire prevention assembly can quickly complete electrical circuit breaking, and simultaneously synchronously links the expansion of the silicon-titanium fireproof cloth to form a full-circle closed protection, so that the equipment is prevented from being eroded by the flame, and the safety of the fire fighting operation is ensured. In daily operation, the circulating water cooling assembly forms a closed loop progressive cooling link through four synergies of water droplet scattering, strong wind sweeping, water film extension and air cooling acceleration, cooperates with the air-water linkage ventilation system, and realizes the double improvement of safety and green energy saving.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, specifically to a large-capacity, low-loss, green transformer that uses high-temperature superconducting wire. Background Technology

[0002] The box-type superconducting transformer is a compact integrated power device that highly integrates high-temperature superconducting core components, cryogenic cooling system, and conventional power distribution unit within a standard box-type enclosure. It is a new generation of green and energy-saving substation devices that meet the needs of efficient deployment in modern power grids. The superconducting transformer has built-in high-temperature superconducting windings and amorphous alloy cores. It adopts a split-cavity Dewar structure to achieve low-temperature immersion of the windings and room-temperature isolation of the core. The box-type superconducting transformer integrates the closed-loop liquid nitrogen circulation pump, small refrigerator, and liquid level monitoring module into the enclosure, eliminating the need to build a dedicated cryogenic machine room. In the Chinese patent application CN202211457201.5 entitled "An Automatic Compensation Device for Liquid Nitrogen Cooling in a Superconducting Transformer", the liquid nitrogen level in the tank gradually decreases as the liquid nitrogen in the tank is consumed. The float plate also descends as the liquid nitrogen level decreases. The first telescopic rod gradually extends downwards until the float plate descends to a certain extent with the liquid level. Then, the connecting rod moves downwards with the ball plug. Driven by the connecting rod, the second telescopic rod rotates until the pressure head presses the control button. At this time, the liquid nitrogen pump starts and sends liquid nitrogen into the tank through the hollow tube via the first delivery pipe, which plays an automatic compensation role for the liquid nitrogen in the tank and makes the compensation of liquid nitrogen more timely. This patent enables automatic compensation of liquid nitrogen inside a superconducting transformer. However, in the event of a fire, existing box-type superconducting transformers cannot quickly disconnect their high and low voltage terminals from the power transmission lines. The current continuing to flow into the transformer after a fire can easily damage it. Furthermore, existing box-type transformers cannot protect the superconducting transformer body before rescue personnel arrive, resulting in significant economic losses. In addition, existing box-type superconducting transformers have poor heat dissipation performance during daily operation, and the heat generated by the internal electrical components can easily affect the Dewar insulation layer, accelerating the vaporization of liquid nitrogen and increasing the operating load of the liquid nitrogen refrigeration system, resulting in poor energy-saving effects. Summary of the Invention

[0003] This invention provides a large-capacity, low-loss, green transformer using high-temperature superconducting wire assembly, which can effectively solve the problems in the background art where existing box-type superconducting transformers cannot effectively protect the internal superconducting transformer body in the event of a fire, resulting in significant economic losses, and in daily operation, existing box-type superconducting transformers have poor heat dissipation performance, require a larger operating load on the liquid nitrogen refrigeration system, and have poor energy-saving effect.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a large-capacity, low-loss green transformer using high-temperature superconducting wire, comprising a protective outer casing, an inner protective casing inside the outer casing, an outgoing terminal on the top of the inner protective casing, and a heat dissipation and fireproof component between the inner protective casing and the outgoing terminal; The heat dissipation and fireproof component includes a wiring base rod, a wiring top rod, a docking sleeve, a docking clamp, and a linkage plate. The linkage plate is connected to the docking clamp to drive the docking clamp to separate from the docking sleeve, thereby disconnecting the outgoing terminal from the external line and triggering the fireproof cloth to unfold and form protection. The protective outer casing is equipped with a water-cooling circulation component, which includes a rectangular water pipe, a water box, and a cooling cylinder. The rectangular water pipe and the cooling cylinder are connected to form a circulating cooling loop to circulate heat dissipation and cool down the inside of the protective outer casing. The heat dissipation and fireproof components work together with the water cooling circulation components to achieve rapid power-off, fire protection, and circulating cooling of the transformer.

[0005] According to the above technical solution, a wiring base rod is connected to the top of the outgoing terminal, a hoisting frame is installed on the top of the inner side of the protective outer box, six wiring top rods are fixed on the top of the inner side of the hoisting frame, and a mating sleeve is connected to the top of the wiring base rod and the bottom of the wiring top rod; Support frames are installed at the four corners of the top of the protective inner box. The tops of the two support frames on the same side are connected by several ceramic sliding rods to three docking heads. The docking heads are embedded in the middle of two opposite docking sleeves. An air inlet frame is installed at one end of the protective outer casing, and an exhaust frame is installed at the other end of the protective outer casing. Multiple rectangular water pipes are connected inside the air inlet frame and the exhaust frame. Water boxes are connected to both ends of the rectangular water pipes. A water-driven impeller is rotatably installed inside the water box, and a ventilation fan is connected to one end of the water-driven impeller.

[0006] According to the above technical solution, the ceramic slide rod is slidably connected to the top of the support frame, an electric push cylinder is installed at one end of the inner side of the hoisting frame, a linkage plate is connected to the output end of the electric push cylinder, the two ends of the linkage plate are respectively connected to one end of the adjacent ceramic slide rod, an assembly plate is connected between the two adjacent docking heads through the ceramic slide rod, a connecting rod is connected to one side of the assembly plate, and a magnet plate is connected to the top of the connecting rod.

[0007] According to the above technical solution, the bottom of both sides of the hoisting frame is provided with a connecting opening, a shielding plate is installed on the outside of the hoisting frame, a fireproof cloth is installed in the gap between the hoisting frame and the shielding plate, the top of the fireproof cloth is connected to the top of the inner side of the shielding plate, a counterweight frame is connected to the bottom of the fireproof cloth, the counterweight frame is provided with several fixing plates, and the magnet plate passes through the connecting opening and is attached to the adjacent fixing plate; A fireproof groove is installed on the bottom inner side of the protective outer box and on the outside of the protective inner box. The fireproof groove is located directly below the counterweight frame, and the longitudinal cross-section of the fireproof groove is U-shaped.

[0008] According to the above technical solution, ventilation openings are provided at both ends of the protective inner box, and ventilation mesh plates are slidably installed at both ends of the protective inner box outside the ventilation openings; A filter screen is installed on one side of the air inlet frame and the air outlet frame. An assembly stand is installed inside the air inlet frame. Multiple docking blocks are installed at equal intervals on one side of the assembly stand. A rectangular water pipe located inside the air inlet frame is located between two adjacent docking blocks. A connecting water channel is symmetrically arranged inside the docking block. A docking frame is sleeved on the top of the docking block. The docking frame and the docking block are fixed with screws. A water-passing plate is welded to the top of the docking frame. A return cavity is set inside the water-passing plate. Multiple water-cooling fins are welded to the top and bottom of the water-passing plate.

[0009] According to the above technical solution, the rectangular water pipe located inside the air inlet frame is connected end to end by a connecting block, and the rectangular water pipe located inside the air outlet frame is connected end to end by a connecting pipe. The docking frame is provided with two docking water pipes. One end of the docking water pipe is embedded in the adjacent connecting water channel. The top and bottom sides of the water-passing plate are respectively connected to the other ends of the two adjacent docking water pipes. The top of the docking block at the top is connected to one end of the cold water inlet pipe, and the bottom of the docking block at the bottom is connected to one end of the water inlet pipe. An assembly perforated plate is installed on one side of the inner side of the protective outer casing. A serpentine water pipe is connected to one side of the assembly perforated plate. The other end of the water inlet pipe passes through the protective outer casing and is connected to one end of the serpentine water pipe. The other end of the serpentine water pipe is connected to one end of the drain pipe.

[0010] According to the above technical solution, the protective outer casing is equipped with a water-cooling circulation assembly, which includes a cooling cylinder; A cooling cylinder is installed on one side of the protective outer casing, near the exhaust frame. A top sealing net is installed on the top of the cooling cylinder. Several drainage holes are installed at equal intervals inside the cooling cylinder. A cooling pipe is installed in the center of the cooling cylinder, penetrating the center of the drainage holes. A spray nozzle is connected to the top of the cooling pipe. Multiple spray holes are evenly opened on the surface of the spray nozzle. Several inverted U-shaped tubes are connected at equal intervals on both sides of the cooling cylinder. A flared mouth is connected to the top of the inverted U-shaped tubes. The flared end faces the exhaust frame, and an isolation net is provided at the flared end. The connection point between the U-shaped pipe and the cooling cylinder is located between two adjacent drainage holes.

[0011] According to the above technical solution, the bottom end of the cooling pipe is connected to the other end of the drain pipe, the bottom of the cooling cylinder is connected to one end of the return cooling bottom pipe, the other end of the return cooling bottom pipe passes through the exhaust frame and is connected to the bottom of the rectangular water pipe at its bottom, and the top of the rectangular water pipe located at the top of the exhaust frame is connected to one end of the return cooling top pipe. A water storage tank is installed in the middle of the top of the protective outer casing. An air inlet mesh frame is installed on top of the water storage tank. Multiple mesh holes are evenly arranged around the air inlet mesh frame. A water-cooling cover is installed on top of the air inlet mesh frame. A drip plate is installed on the bottom inner side of the water-cooling cover. Multiple corrugated plates are welded at equal intervals on the top surface of the drip plate. A water distribution main pipe is installed on the top inner side of the water-cooling cover. Multiple water distribution branch pipes are connected at equal intervals on both sides of the water distribution main pipe. Multiple water spray heads are connected at equal intervals at the bottom of the water distribution branch pipes. Two fan balls are installed on the top of the water-cooling cover. A water supply pipe head is connected to the side of the top of the water-cooling cover closest to the two fan balls.

[0012] According to the above technical solution, a return water pump and a delivery water pump are respectively installed at both ends of the top of the protective outer casing. The inlet of the return water pump is connected to the other end of the return cooling top pipe. The outlet of the return water pump is connected to the middle of the top of the main water distribution pipe through a delivery pipe. The inlet of the delivery water pump is connected to the bottom of one end of the water storage tank through a delivery pipe. The outlet of the delivery water pump is connected to the other end of the cold water inlet pipe.

[0013] According to the above technical solution, the input terminals of the electric push cylinder, the return water pump, and the delivery water pump are electrically connected to the output terminal of the controller, and the input terminal of the controller is electrically connected to the output terminal of the external power supply.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Equipped with heat dissipation and fire prevention components, when a fire occurs inside the box-type superconducting transformer, the electric push cylinder drives the ceramic slide rod to move the docking clamp head out of the docking sleeve, causing the connection top rod and connection bottom rod to break the circuit instantly, quickly cutting off the connection between the superconducting transformer and the external line. This not only avoids irreversible damage caused by the impact of the fault high current on the superconducting body, but also eliminates the risk of live electricity for subsequent fire fighting operations, ensuring rescue safety. At the same time, the fire prevention and isolation action is triggered when the power is cut off. The magnetically attracted magnetic plate and the fixing plate separate with the linkage structure. After the counterweight frame loses its fixation, it falls into the fireproof groove by gravity. The originally folded silicon titanium fireproof cloth automatically unfolds, forming a fully enclosed protective barrier with the hoisting frame and shielding plate, completely wrapping the protective inner box where the superconducting transformer is located, blocking the corrosion of external flames and high-temperature smoke, and greatly reducing equipment loss. It is equipped with a circulating water cooling system, which can achieve efficient temperature control. During normal operation, the clean water in the water tank is sent to the rectangular water pipe and water box of the air inlet frame by the water pump, which drives the water drive impeller to drive the ventilation fan. After the cold air is drawn in, it is first pre-cooled by the water plate and water cooling fins, forming a low-temperature airflow that is sent into the box. At the same time, the water flows through the aluminum serpentine water pipe and quickly removes the working heat of the electrical components through the mounting perforated plate. Combined with the ventilation channel that runs through the box, the internal heat is continuously discharged, which greatly slows down the aging speed of the electrical components. The flowing air can also pass directly through the ventilation openings of the protective inner box, carrying away the heat from the surface of the superconducting iron core, reducing the impact of high temperature on the Dewar insulation layer, effectively slowing down the vaporization rate of liquid nitrogen, reducing the long-term operating load of the refrigeration system, and achieving energy saving and consumption reduction while improving the stability of equipment operation.

[0015] 2. Equipped with a water-cooling circulation component, this box-type superconducting transformer is equipped with a circulating water-cooling system, which can significantly improve the cooling efficiency of the transformer's heat dissipation chain, forming a multi-stage progressive high-efficiency water cooling closed loop. High-temperature return water is sent into the cooling pipe through the drain pipe and then sprayed evenly from the spray holes of the spray pipe head. Under the action of gravity, the water flow passes through multiple layers of drainage perforated plates and disperses into fine water droplets. During the falling process, it fully contacts the air to complete the initial cooling, ensuring the water cooling effect during subsequent circulating water cooling. At the same time, the water flow on the exhaust side drives the water-driven impeller and the ventilation fan to operate, guiding the hot air inside the box to be discharged outwards, improving the heat dissipation effect of the box-type transformer. The airflow blown out can also be guided through the horn mouth into the U-tube and then blow directly onto the falling water droplets in the cooling cylinder. Through forced convection, the heat on the surface of the water droplets is quickly removed, further accelerating the cooling speed. After cooling, the return water is sent to the distribution pipeline through the return cooling bottom pipe. It is then evenly sprayed onto the corrugated arc plate from the spray nozzle, spreading out to form a large-area flowing water film on the plate surface. This significantly increases the contact area with the cold air. Combined with the non-powered fan ball driving the external cold air to flow quickly through the inside of the water-cooled cover, it finally flows into the water storage tank through the drip plate. The entire process involves four synergistic cooling methods: water droplet dispersion, strong wind blowing, water film extension, and wind-cooled acceleration. This significantly reduces the temperature of the circulating water supply, providing continuous and efficient water cooling protection for the long-term stable operation of the transformer.

[0016] In summary, this box-type superconducting transformer integrates two core components: heat dissipation and fire prevention, and water-cooling circulation, constructing a comprehensive safety temperature control system. In the event of a fire, the heat dissipation and fire prevention components can quickly disconnect the electrical circuit and simultaneously activate the silicon-titanium fireproof cloth to provide full-circuit protection, preventing flames from eroding the equipment and ensuring the safety of firefighting operations. During daily operation, the circulating water-cooling components form a closed-loop progressive cooling chain through four synergies: water droplet dissipation, strong wind blowing, water film extension, and wind-cooling acceleration. Combined with the air-water linkage ventilation system, it quickly removes heat from the electrical components and iron core inside the transformer, ensuring efficient heat dissipation while significantly reducing the operating load of the cooling system, achieving a dual improvement in safety and green energy saving. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0018] In the attached diagram: Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the heat dissipation and fireproof component of the present invention; Figure 3 This is a schematic diagram of the installation structure of the fireproof cloth of the present invention; Figure 4 This is a schematic diagram of the counterweight frame of the present invention; Figure 5 This is a schematic diagram of the installation structure of the wiring top rod of the present invention; Figure 6 This is a schematic diagram of the installation structure of the connector head of the present invention; Figure 7 This is a schematic diagram of the installation structure of the assembly stand of the present invention; Figure 8 This is a schematic diagram of the installation structure of the ventilation fan of the present invention; Figure 9 This is a schematic diagram of the installation structure of the water-cooled fins of the present invention; Figure 10 This is a cross-sectional view of the docking block of the present invention; Figure 11 This is a schematic diagram of the installation structure of the water box of the present invention; Figure 12 This is a schematic diagram of the structure of the water-cooled circulation component of the present invention; Figure 13 This is a schematic diagram of the installation structure of the drainage perforated plate of the present invention; Figure 14 This is a schematic diagram of the installation structure of the drip plate of the present invention; Figure 15 This is a schematic diagram of the installation structure of the corrugated plate of the present invention; The diagram shows: 1. Protective outer casing; 2. Protective inner casing; 3. Outgoing terminal; 4. Heat dissipation and fireproof components; 401. Wiring base rod; 402. Lifting frame; 403. Wiring top rod; 404. Connecting sleeve; 405. Support frame; 406. Ceramic slide rod; 407. Connecting clamp; 408. Linkage plate; 409. Electric push cylinder; 410. Assembly plate; 411. Connecting rod; 412. Magnetic plate; 413. Connecting port; 414. Sheltering panel; 415. Fireproof cloth; 416. Counterweight frame; 417. Fixing plate; 418. Fireproof groove; 419. Ventilation opening; 420. Ventilation mesh plate; 421. Air inlet frame; 422. Air outlet frame; 423. Assembly stand; 424. Connecting block; 425. Rectangular water pipe; 426. Water passage box; 427. Water-driven impeller; 428. Ventilation fan; 429. Connecting water channel; 430. Connecting frame; 431. Connecting water pipe; 432. Water passage plate; 433. Return cavity; 434. Water-cooled fins; 435. Cooling water inlet pipe; 436. Water inlet pipe; 437. Assembly perforated plate; 438. Snake-shaped water pipe; 439. Drain pipe; 440. Filter screen; 441. Connecting pipe; 5. Water-cooled circulation components; 501. Cooling cylinder; 502. Top sealing mesh; 503. Drainage perforated plate; 504. Cooling pipe; 505. Spray nozzle; 506. Spray hole; 507. U-shaped pipe; 508. Trumpet mouth; 509. Isolation mesh; 510. Return cooling bottom pipe; 511. Return cooling top pipe; 512. Return water pump; 513. Water storage tank; 514. Air inlet mesh frame; 515. Water-cooled cover; 516. Drip perforated plate; 517. Corrugated plate; 518. Main water distribution pipe; 519. Branch water distribution pipe; 520. Spray head; 521. Fan ball; 522. Water pump; 523. Water supply pipe head. Detailed Implementation

[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0020] Example: Figure 1-15As shown, this invention provides a technical solution for a large-capacity, low-loss, green transformer using high-temperature superconducting wire, including a protective outer casing 1, an inner protective casing 2 installed at the bottom inside the outer casing 1, six outgoing terminals 3 on the top of the inner protective casing 2, and a heat dissipation and fireproof assembly 4 provided between the inner protective casing 2 and the outgoing terminals 3. The heat dissipation and fireproof assembly 4 includes a wiring base rod 401, a lifting frame 402, a wiring top rod 403, a connecting sleeve 404, a support frame 405, a ceramic sliding rod 406, a connecting clamp 407, a linkage plate 408, an electric pusher cylinder 409, an assembly plate 410, a connecting rod 411, a magnet plate 412, and a connecting port 413. 414. Barrier panel 415. Fireproof cloth 416. Counterweight frame 417. Fixing plate 418. Fireproof groove 419. Ventilation opening 419. Ventilation mesh 420. Air inlet frame 421. Air outlet frame 422. Assembly stand 423. Connecting block 424. Rectangular water pipe 425. Water box 426. Water-driven impeller 427. Ventilation fan 428. Connecting water channel 429. Connecting frame 430. Connecting water pipe 431. Water plate 432. Return cavity 433. Water-cooled fins 434. Cooling water inlet pipe 435. Water inlet pipe 436. Assembly perforated plate 437. Serpentine water pipe 438. Drain pipe 439. Filter screen 440 and connecting pipe 441; The top of the outgoing terminal 3 is connected to a wiring base rod 401. A hoisting frame 402 is installed on the top of the inner side of the protective outer box 1. Six wiring top rods 403 are fixed on the top of the inner side of the hoisting frame 402. The top of the wiring base rod 401 and the bottom of the wiring top rod 403 are both connected to a mating sleeve 404. Among the six outgoing terminals 3, three are high-voltage outgoing terminals and three are low-voltage outgoing terminals. The top of the wiring top rod 403 is connected to the external power transmission line. Support frames 405 are installed at the four corners of the top of the protective inner casing 2. Two support frames 405 on the same side are connected to three docking heads 407 via several ceramic sliding rods 406. The docking heads 407 are embedded between two opposite docking sleeves 404. The wiring bottom rod 401, wiring top rod 403, docking sleeves 404, and docking heads 407 are made of copper. The ceramic sliding rods 406 are slidably connected to the top of the support frames 405. An electric pusher cylinder 409 is installed at one end of the inner side of the hoisting frame 402. The output end of the push cylinder 409 is connected to the linkage plate 408. Both ends of the linkage plate 408 are connected to one end of the adjacent ceramic slide rod 406. Under the driving action of the linkage plate 408, the electric push cylinder 409 can drive the ceramic slide rod 406 and the docking head 407 to move horizontally. Therefore, controlling the electric push cylinder 409 can move the docking head 407 out of the middle of the two opposite docking sleeves 404. After the docking head 407 is moved out of the two opposite docking sleeves 404, the wiring top rod 403 and the wiring bottom rod 401 are disconnected. An assembly plate 410 is connected between two adjacent docking heads 407 via a ceramic slide rod 406. A connecting rod 411 is connected to one side of the assembly plate 410, and a magnetic plate 412 is connected to the top of the connecting rod 411. Connecting openings 413 are provided at the bottom of both sides of the lifting frame 402. A shielding plate 414 is installed on the outside of the lifting frame 402. A fireproof cloth 415 is installed in the gap between the lifting frame 402 and the shielding plate 414. The top of the fireproof cloth 415 is connected to the top of the inner side of the shielding plate 414. A counterweight frame 416 is connected to the bottom of the fireproof cloth 415. The counterweight frame 416 is provided with several fixing plates 417. The magnetic plate 412 passes through the connecting opening 413 and fits against the adjacent fixing plate 417. A fireproof groove 418 is installed on the bottom inner side of the protective outer box 1 and outside the protective inner box 2. The fireproof groove 418 is located at the bottom of the protective outer box 1 and outside the protective inner box 2. Directly below the counterweight frame 416, the fireproof groove 418 has a U-shaped longitudinal section and is made of iron. When the magnetic plate 412 is attached to the fixing plate 417, the magnetic plate 412 can fix the counterweight frame 416 under the action of magnetic force, preventing the counterweight frame 416 from falling. The fireproof cloth 415 is a folded silicon titanium fireproof cloth 415. When a fire occurs inside the protective outer box 1, the electric push cylinder 409 pushes the docking head 407 to move and separate from the docking sleeve 404. The magnetic plate 412 separates from the connected fixing plate 417, and the counterweight frame 416 loses its fixation. Under the action of gravity, the counterweight frame 416 falls into the fireproof groove 418. The folded silicon titanium fireproof cloth 415 unfolds to surround the protective inner box 2, preventing the flame from eroding the protective inner box 2, effectively protecting the superconducting transformer and reducing economic losses. An air inlet frame 421 is installed at one end of the protective outer casing 1, and an exhaust frame 422 is installed at the other end. Multiple rectangular water pipes 425 are connected inside both the air inlet frame 421 and the exhaust frame 422. Water boxes 426 are connected to both ends of the rectangular water pipes 425. A water-driven impeller 427 is rotatably installed inside the water box 426. A ventilation fan 428 is connected to one end of the water-driven impeller 427. Ventilation openings 419 are provided at both ends of the protective inner casing 2, and the two ends of the protective inner casing 2 are located at the ventilation openings 419. The ventilation mesh plate 420 is slidably installed on the outside. When the ventilation fan 428 inside the air inlet frame 421 and the air outlet frame 422 rotates, the outside air can flow through the air inlet frame 421, the protective outer box 1 and the air outlet frame 422 in sequence. The flowing air can quickly carry away the heat inside the protective outer box 1. When the flowing air flows through the protective outer box 1, it will pass through the ventilation port 419 and pass through the protective inner box 2. Under the action of the airflow, the heat of the iron core inside the protective inner box 2 can be carried away, and the iron core can be cooled down. A filter screen 440 is installed on one side of the air inlet frame 421 and the air outlet frame 422. The filter screen 440 can prevent external impurities from entering the protective outer casing 1. An assembly stand 423 is installed inside the air inlet frame 421. Multiple docking blocks 424 are installed at equal intervals on one side of the assembly stand 423. A rectangular water pipe 425 located inside the air inlet frame 421 is located between two adjacent docking blocks 424. A connecting water channel 429 is symmetrically arranged inside the docking block 424. A docking frame 430 is sleeved on the top of the docking block 424. The docking frame 430 and the docking block 424 are fixed with screws. A water passage plate 432 is welded to the top of the docking frame 430. A return cavity 433 is set inside the water passage plate 432. Multiple water-cooled fins 434 are welded to the top and bottom of the water passage plate 432. The docking frame 430 is provided with two docking water pipes 431. One end of the docking water pipe 431 is embedded in the adjacent connecting water channel 429. The top and bottom sides of the water-passing plate 432 are respectively connected to the other ends of two adjacent docking water pipes 431. The top of the docking block 424 is connected to one end of the cold water inlet pipe 435, and the bottom of the docking block 424 is connected to one end of the water inlet pipe 436. The rectangular water pipe 425 inside the air inlet frame 421 is connected end to end through the docking block 424. When the water flows from the cold water inlet pipe 435 into the rectangular water pipe 425, it will flow through the water-passing box 426. When the water flows through the water-passing box 426, it will drive the water-driven impeller 427 to rotate, which in turn drives the ventilation fan 428 to rotate. When the water flows into the docking block 424, the water will first flow through the connecting water channel 429 and the docking water pipe 431 at the top of the inner side of the docking block 424, then flow through the return cavity 433 inside the water-passing plate 432, and then enter the connecting water channel 429 and the docking water pipe 431 at the bottom of the inner side of the docking block 424. The rectangular water pipe 425 located inside the exhaust frame 422 is connected end to end by the connecting pipe 441. An assembly perforation plate 437 is installed on one side inside the protective outer box 1. A serpentine water pipe 438 is connected to one side of the assembly perforation plate 437. The other end of the water inlet pipe 436 passes through the protective outer box 1 and is connected to one end of the serpentine water pipe 438. The other end of the serpentine water pipe 438 is connected to one end of the drain pipe 439. The assembly perforation plate 437 is used to install the electrical components required for the transformer. The rectangular water pipe 425, the cooling water inlet pipe 435, the water inlet pipe 436, the assembly perforation plate 437, and the serpentine water pipe 438 are made of aluminum. The heat generated by the electrical components installed on the assembly perforation plate 437 can be conducted to the assembly perforation plate 437. When water flows through the water inlet pipe 436 into the serpentine water pipe 438, the flowing cold water can cool the assembly perforation plate 437 under the action of heat conduction, thereby reducing the heat inside the protective outer box 1. The protective outer casing 1 is equipped with a water-cooled circulation assembly 5, which includes a cooling cylinder 501, a top sealing mesh 502, a drainage perforated plate 503, a cooling pipe 504, a spray nozzle 505, a spray hole 506, an inverted U-shaped pipe 507, a bell mouth 508, an isolation mesh 509, a return cooling bottom pipe 510, a return cooling top pipe 511, a return water pump 512, a water storage tank 513, an air inlet mesh frame 514, a water-cooled cover 515, a drip perforated plate 516, a corrugated plate 517, a main water distribution pipe 518, a branch water distribution pipe 519, a water spray head 520, a fan ball 521, a water pump 522, and a water supply pipe head 523. A cooling cylinder 501 is installed on one side of the outer protective casing 1, near the exhaust frame 422. A top sealing net 502 is installed on the top of the cooling cylinder 501. Several drainage perforated plates 503 are installed at equal intervals inside the cooling cylinder 501. A cooling pipe 504 is installed in the center of the cooling cylinder 501. The cooling pipe 504 passes through the center of the drainage perforated plate 503. A spray nozzle 505 is connected to the top of the cooling pipe 504. Multiple spray holes 506 are evenly opened on the surface of the spray nozzle 505. After water enters the interior of the spray nozzle 505, it will be sprayed out from the spray holes 506. Under the action of gravity, the sprayed water passes through the multiple drainage perforated plates 503 and falls into the bottom of the inner side of the cooling cylinder 501. The water will form water droplets after passing through the drainage perforated plates 503. The water droplets come into contact with the air during the descent. The air carries away the heat from the water droplets and cools them down. Several inverted U-shaped tubes 507 are connected at equal intervals on both sides of the cooling cylinder 501. The top of the inverted U-shaped tube 507 is connected to a flared mouth 508. The opening end of the flared mouth 508 faces the exhaust frame 422. An isolation net 509 is provided at the opening end of the flared mouth 508. The connection position between the inverted U-shaped tube 507 and the cooling cylinder 501 is located between two adjacent drainage holes 503. The inverted U-shaped tube 507 can prevent water from entering the flared mouth 508 from the inside of the cooling cylinder 501. The air blown out from the exhaust frame 422 can enter the flared mouth 508 and then enter the cooling cylinder 501 through the inverted U-shaped tube 507. After the air enters the cooling cylinder 501, it will blow away the water droplets dripping inside the cooling cylinder 501. Under the airflow, the heat on the water droplets can be removed more quickly. The bottom end of the cooling pipe 504 is connected to the other end of the drain pipe 439. The bottom of the cooling cylinder 501 is connected to one end of the return cooling bottom pipe 510. The other end of the return cooling bottom pipe 510 passes through the exhaust frame 422 and is connected to the bottom of the rectangular water pipe 425 at its inner bottom. A one-way valve is installed in the middle of the return cooling bottom pipe 510, so that water can only flow from the inside of the cooling cylinder 501 to the inside of the adjacent rectangular water pipe 425. The top of the rectangular water pipe 425 located at the top of the exhaust frame 422 is connected to one end of the return cooling top pipe 511. A return water pump 512 and a water delivery pump 522 are respectively installed at the top two ends of the protective outer casing 1. The water inlet of the return water pump 512 is connected to the other end of the return cooling top pipe 511, and the water outlet of the return water pump 512 is... The end is connected to the top middle of the main water pipe 518 through the water supply pipe. The water inlet of the water pump 522 is connected to the bottom of one end of the water storage tank 513 through the water supply pipe. The water outlet of the water pump 522 is connected to the other end of the cold water inlet pipe 435. After the water falls into the bottom of the inner side of the cooling cylinder 501, the return water pump 512 starts. The water falling into the bottom of the inner side of the cooling cylinder 501 flows into the rectangular water pipe 425 inside the exhaust frame 422 through the return cooling bottom pipe 510. When the water flows inside the rectangular water pipe 425 inside the exhaust frame 422, the water flow also drives the water drive impeller 427 and the ventilation fan 428 on this side to rotate. Under the guidance of the ventilation fan 428, the air inside the protective outer casing 1 flows to the outside. A water storage tank 513 is installed in the middle of the top of the protective outer casing 1. An air inlet mesh frame 514 is installed on top of the water storage tank 513. Multiple mesh holes are evenly arranged around the air inlet mesh frame 514. A water cooling cover 515 is installed on top of the air inlet mesh frame 514. A drip plate 516 is installed on the bottom inner side of the water cooling cover 515. Multiple corrugated plates 517 are welded at equal intervals on the top surface of the drip plate 516. A water distribution main pipe 518 is installed on the top inner side of the water cooling cover 515. Multiple water distribution main pipes 518 are connected at equal intervals on both sides. Water distribution branch pipe 519, with multiple water spray heads 520 connected at equal intervals at the bottom of water distribution branch pipe 519, two fan balls 521 installed on the top of water cooling cover 515, and a water supply pipe head 523 connected to the side of the top of water cooling cover 515 near the two fan balls 521, electric push cylinder 409, return water pump 512 and water supply pump 522 input terminals are electrically connected to the controller output terminal, the controller input terminal is electrically connected to the external power supply output terminal, the controller can control the operation of the corresponding electrical components, which is convenient for automated control.

[0021] The working principle and usage process of this invention: When a fire occurs inside the protective outer casing 1, the electric push cylinder 409 is activated. Under the connection and driving action of the linkage plate 408, the electric push cylinder 409 drives the ceramic slide rod 406 and the docking head 407 to move horizontally. After the docking head 407 moves out from between the two opposite docking sleeves 404, the wiring top rod 403 and the wiring bottom rod 401 are disconnected, and the superconducting transformer is disconnected from the external line, avoiding damage to the superconducting transformer by the fault high current. In subsequent fire rescue, it also ensures the safe conduct of fire fighting operations. When the top rod 403 and the bottom rod 401 are energized, the magnet plate 412 and the fixing plate 417 are attached. Under the action of magnetic force, the magnet plate 412 fixes the counterweight frame 416. The fireproof cloth 415 is a folded silicon titanium fireproof cloth 415. When a fire occurs inside the protective outer box 1, the electric push cylinder 409 pushes the docking head 407 to move and separate from the docking sleeve 404. The magnet plate 412 separates from the connected fixing plate 417, and the counterweight frame 416 loses its fixation. Under the action of gravity, the counterweight frame 416 falls into the fireproof groove 418. The folded silicon titanium fireproof cloth 415 unfolds and, together with the hoisting frame 402, the shielding plate 414 and the fireproof groove 418, surrounds the protective inner box 2, preventing external flames from eroding the protective inner box 2, effectively protecting the superconducting transformer and reducing economic losses. The water storage tank 513 contains clean water. During normal operation of the box-type transformer, the water supply pump 522 and the return water pump 512 operate. Under the guidance of the water supply pump 522, the water inside the water storage tank 513 enters the rectangular water pipe 425 and the water box 426 inside the air inlet frame 421 through the cold water inlet pipe 435. The water flow drives the water-driven impeller 427 and the ventilation fan 428 on this side to rotate. External cold air enters the protective outer casing 1 through the air inlet frame 421. At the same time, when the water flows into the docking block 424, the water flow will first flow through the top of the inner side of the docking block 424. The water flows through the connecting water channel 429 and the docking water pipe 431, then through the return cavity 433 inside the water plate 432, and then into the connecting water channel 429 and the docking water pipe 431 at the bottom of the inner side of the docking block 424. Under the action of heat conduction, the water flow can cool the water plate 432 and the water-cooled fins 434. When the external air enters the protective outer box 1 from the air inlet frame 421, the external air will blow on the surface of the water plate 432 and the water-cooled fins 434. Under the action of heat conduction, the temperature of the air entering the protective outer box 1 is lower, and the cooling effect on the box-type transformer is better. After the water flows through the rectangular water pipe 425 inside the air inlet frame 421, it enters the serpentine water pipe 438 through the water inlet pipe 436, and then enters the cooling pipe 504 through the drain pipe 439. The mounting plate 437 is used to install the electrical components required for the transformer. The rectangular water pipe 425, the cooling water inlet pipe 435, the water inlet pipe 436, the mounting plate 437, and the serpentine water pipe 438 are made of aluminum. The heat generated by the electrical components installed on the mounting plate 437 can be conducted to the mounting plate 437. When the water flows through the water inlet pipe 436 into the serpentine water pipe 438, the flowing cold water can cool the mounting plate 437 under the action of heat conduction, thereby reducing the heat inside the protective outer box 1. Combined with the flow of cold air guided by the ventilation fan 428, the heat inside the box transformer can be dissipated in time, reducing the damage of high temperature to electrical components, slowing down the aging rate of electrical components inside the box transformer, and fully improving the heat dissipation effect of the box transformer. Ventilation mesh plates 420 are slidably installed at both ends of the inner protective box 2 outside the ventilation openings 419. When the ventilation fan 428 inside the air inlet frame 421 and the air outlet frame 422 rotates, the external air can flow through the air inlet frame 421, the outer protective box 1 and the air outlet frame 422 in sequence. The flowing air can quickly carry away the heat inside the outer protective box 1. When the flowing air flows through the outer protective box 1, it will pass through the ventilation openings 419 and then through the inner protective box 2. Under the influence of the airflow, the heat of the iron core inside the inner protective box 2 can be carried away, thereby cooling the iron core, improving the heat dissipation effect of the iron core, reducing the impact of the heat generated by the iron core on the Dewar insulation layer, slowing down the vaporization rate of liquid nitrogen, reducing the operating load of the transformer liquid nitrogen refrigeration system, and making it more green and environmentally friendly. Water flows through the drain pipe 439 into the cooling pipe 504 and is sprayed out from the spray holes 506 on the surface of the spray pipe head 505. Under the action of gravity, the sprayed water passes through multiple drainage holes 503 and falls into the bottom of the inner side of the cooling cylinder 501. The water forms water droplets as it passes through the drainage holes 503. As the water droplets fall, they come into contact with the air. The air carries away the heat from the water droplets and cools them down, thus lowering the temperature of the cooled water. This ensures the cooling effect during subsequent circulating water cooling. After water falls into the bottom of the inner side of the cooling cylinder 501, the return water pump 512 starts. The water that has fallen into the bottom of the inner side of the cooling cylinder 501 flows into the rectangular water pipe 425 inside the exhaust frame 422 through the return cooling bottom pipe 510. When the water flows inside the rectangular water pipe 425 inside the exhaust frame 422, the water flow also drives the water-driven impeller 427 and the ventilation fan 428 on that side to rotate. Under the guidance of the ventilation fan 428, the air inside the protective outer casing 1 flows outward, and the cooling cylinder 501 is equidistant on both sides. Several inverted U-tubes 507 are connected, and the top of the inverted U-tubes 507 is connected to a flared mouth 508. The open end of the flared mouth 508 faces the exhaust frame 422. The air blown out from the exhaust frame 422 can enter the flared mouth 508 and then enter the cooling cylinder 501 through the inverted U-tubes 507. After the air enters the cooling cylinder 501, it will blow away the water droplets dripping inside the cooling cylinder 501. Under the blowing of the airflow, the heat on the water droplets can be removed more quickly, further improving the cooling speed of the water droplets. Guided by the return water pump 512, the cooled water enters the main water pipe 518 and the branch water pipes 519, and is finally sprayed out from the spray nozzle 520. The sprayed water falls onto the corrugated plate 517. The surface of the corrugated plate 517 is arc-shaped, and the sprayed water can flow along the corrugated plate 517 to the drip plate 516. The water then drips through the drip plate 516 into the water storage tank 513. When the water flows on the surface of the corrugated plate 517, it forms a flowing water film. The water film has a larger contact area with the air, which improves the cooling speed of the water. The wind ball 521 is a non-powered wind ball 521 in the prior art. The rotation of the non-powered wind ball 521 can draw the cold air outside the air inlet mesh frame 514 into the water cooling cover 515, which accelerates the flow speed of the cold air inside the water cooling cover 515, further improving the cooling speed of the water. This makes the water delivered by the subsequent water pump 522 even cooler, ensuring the water cooling effect.

[0022] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A large-capacity, low-loss green transformer using high-temperature superconducting wire, comprising a protective outer casing (1), characterized in that, The protective outer box (1) is provided with a protective inner box (2), the top of the protective inner box (2) is provided with a wire outlet terminal (3), and a heat dissipation and fireproof component (4) is provided between the protective inner box (2) and the wire outlet terminal (3). The heat dissipation and fireproof component (4) includes a wiring base rod (401), a wiring top rod (403), a docking sleeve (404), a docking head (407), and a linkage plate (408). The linkage plate (408) is connected to the docking head (407) to drive the docking head (407) to separate from the docking sleeve (404), thereby disconnecting the outgoing terminal (3) from the external line and triggering the fireproof cloth (415) to unfold and form protection. The protective outer casing (1) is equipped with a water cooling circulation assembly (5), which includes a rectangular water pipe (425), a water box (426) and a cooling cylinder (501). The rectangular water pipe (425) and the cooling cylinder (501) are connected to form a circulating cooling circuit to circulate heat dissipation and cool down the inside of the protective outer casing (1). The heat dissipation and fireproof component (4) works in conjunction with the water cooling circulation component (5) to achieve rapid power-off, fire protection and circulating cooling of the transformer.

2. A large-capacity, low-loss green transformer using high-temperature superconducting wire as described in claim 1, characterized in that, The top of the outgoing terminal (3) is connected to a bottom rod (401), and a hoisting frame (402) is installed on the top of the inner side of the protective outer box (1). Six top rods (403) are fixed on the top of the inner side of the hoisting frame (402). The top of the bottom rod (401) and the bottom of the top rod (403) are both connected to a connecting sleeve (404). The protective inner box (2) is equipped with support frames (405) at the four corners of the top. The top of the two support frames (405) on the same side is connected to three docking heads (407) by several ceramic sliding rods (406). The docking heads (407) are embedded in the middle of two opposite docking sleeves (404). An air inlet frame (421) is installed at one end of the protective outer casing (1), and an exhaust frame (422) is installed at the other end of the protective outer casing (1). Multiple rectangular water pipes (425) are connected inside the air inlet frame (421) and the exhaust frame (422). Water boxes (426) are connected to both ends of the rectangular water pipes (425). A water-driven impeller (427) is rotatably installed inside the water box (426). A ventilation fan (428) is connected to one end of the water-driven impeller (427).

3. A large-capacity, low-loss green transformer using high-temperature superconducting wire as described in claim 2, characterized in that, The ceramic slide rod (406) is slidably connected to the top of the support frame (405). An electric push cylinder (409) is installed at one end of the inner side of the hoisting frame (402). A linkage plate (408) is connected to the output end of the electric push cylinder (409). Both ends of the linkage plate (408) are connected to one end of the adjacent ceramic slide rod (406). An assembly plate (410) is connected between two adjacent docking heads (407) through the ceramic slide rod (406). A connecting rod (411) is connected to one side of the assembly plate (410). A magnet plate (412) is connected to the top of the connecting rod (411).

4. A large-capacity, low-loss green transformer using high-temperature superconducting wire as described in claim 3, characterized in that, The bottom of both sides of the hoisting frame (402) is provided with a connecting opening (413). A shielding plate (414) is installed on the outside of the hoisting frame (402). A fireproof cloth (415) is installed in the gap between the hoisting frame (402) and the shielding plate (414). The top of the fireproof cloth (415) is connected to the top of the inner side of the shielding plate (414). The bottom of the fireproof cloth (415) is connected to a counterweight frame (416). The counterweight frame (416) is provided with several fixing plates (417). The magnet plate (412) passes through the connecting opening (413) and is attached to the adjacent fixing plate (417). A fireproof groove (418) is installed on the bottom inner side of the protective outer box (1) and on the outside of the protective inner box (2). The fireproof groove (418) is located directly below the counterweight frame (416), and the longitudinal section of the fireproof groove (418) is U-shaped.

5. A large-capacity, low-loss green transformer using high-temperature superconducting wire as described in claim 2, characterized in that, Ventilation openings (419) are provided at both ends of the protective inner box (2), and ventilation mesh plates (420) are slidably installed at both ends of the protective inner box (2) outside the ventilation openings (419). A filter screen (440) is installed on one side of the air inlet frame (421) and the air outlet frame (422). An assembly stand (423) is installed inside the air inlet frame (421). Multiple docking blocks (424) are installed at equal intervals on one side of the assembly stand (423). A rectangular water pipe (425) located inside the air inlet frame (421) is located between two adjacent docking blocks (424). A connecting water channel (429) is symmetrically arranged inside the docking block (424). A docking frame (430) is sleeved on the top of the docking block (424). The docking frame (430) and the docking block (424) are fixed by screws. A water-passing plate (432) is welded to the top of the docking frame (430). A return cavity (433) is arranged inside the water-passing plate (432). Multiple water-cooled fins (434) are welded to the top and bottom of the water-passing plate (432).

6. A large-capacity, low-loss green transformer using high-temperature superconducting wire as described in claim 5, characterized in that, The rectangular water pipe (425) located inside the air inlet frame (421) is connected end to end through the docking block (424), and the rectangular water pipe (425) located inside the air outlet frame (422) is connected end to end through the connecting pipe (441). The docking frame (430) is provided with two docking water pipes (431). One end of the docking water pipe (431) is embedded in the interior of the adjacent connecting water channel (429). The top side and bottom side of the water-passing plate (432) are respectively connected to the other end of the two adjacent docking water pipes (431). The top of the docking block (424) located at the top is connected to one end of the cold water inlet pipe (435), and the bottom of the docking block (424) located at the bottom is connected to one end of the water inlet pipe (436). An assembly perforated plate (437) is installed on one side inside the protective outer casing (1). A serpentine water pipe (438) is connected to one side of the assembly perforated plate (437). The other end of the water inlet pipe (436) passes through the protective outer casing (1) and is connected to one end of the serpentine water pipe (438). The other end of the serpentine water pipe (438) is connected to one end of the drain pipe (439).

7. A large-capacity, low-loss green transformer using high-temperature superconducting wire as described in claim 6, characterized in that, The protective outer casing (1) is provided with a water cooling circulation assembly (5), which includes a cooling cylinder (501). A cooling cylinder (501) is installed on one side of the protective outer casing (1) and near the exhaust frame (422). A top sealing net (502) is installed on the top of the cooling cylinder (501). Several drainage hole plates (503) are installed at equal intervals inside the cooling cylinder (501). A cooling pipe (504) is installed in the center of the cooling cylinder (501). The cooling pipe (504) passes through the center of the drainage hole plate (503). A spray nozzle (505) is connected to the top of the cooling pipe (504). Several spray holes (506) are evenly opened on the surface of the spray nozzle (505). Several inverted U-shaped pipes (507) are connected at equal intervals on both sides of the cooling cylinder (501). A flared mouth (508) is connected to the top of the inverted U-shaped pipe (507). The flared end (508) faces the exhaust frame (422), and the flared end (508) is provided with an isolation net (509). The connection position of the U-shaped pipe (507) and the cooling cylinder (501) is located between two adjacent drainage holes (503).

8. A large-capacity, low-loss green transformer using high-temperature superconducting wire as described in claim 7, characterized in that, The bottom end of the cooling pipe (504) is connected to the other end of the drain pipe (439). The bottom of the cooling cylinder (501) is connected to one end of the return cooling bottom pipe (510). The other end of the return cooling bottom pipe (510) passes through the exhaust frame (422) and is connected to the bottom of the rectangular water pipe (425) at its bottom. The top of the rectangular water pipe (425) located at the top of the exhaust frame (422) is connected to one end of the return cooling top pipe (511). A water storage tank (513) is installed in the middle of the top of the protective outer casing (1). An air inlet mesh frame (514) is installed on the top of the water storage tank (513). Multiple mesh holes are evenly arranged around the air inlet mesh frame (514). A water cooling cover (515) is installed on the top of the air inlet mesh frame (514). A drip plate (516) is installed on the bottom inner side of the water cooling cover (515). Multiple corrugated plates (517) are welded at equal intervals on the top surface of the drip plate (516). The water cooling cover (515) has a main water distribution pipe (518) installed on the top inner side. Multiple branch water distribution pipes (519) are connected at equal intervals on both sides of the main water distribution pipe (518). Multiple spray nozzles (520) are connected at equal intervals at the bottom of the branch water distribution pipes (519). Two air balls (521) are installed on the top of the water cooling cover (515). A water supply pipe head (523) is connected to the side of the top of the water cooling cover (515) near the two air balls (521).

9. A large-capacity, low-loss green transformer using high-temperature superconducting wire as described in claim 8, characterized in that, The protective outer casing (1) is equipped with a return water pump (512) and a water delivery pump (522) at its top two ends respectively. The inlet of the return water pump (512) is connected to the other end of the return cooling top pipe (511). The outlet of the return water pump (512) is connected to the middle of the top of the main water distribution pipe (518) through a water delivery pipe. The inlet of the water delivery pump (522) is connected to the bottom of one end of the water storage tank (513) through a water delivery pipe. The outlet of the water delivery pump (522) is connected to the other end of the inlet cooling water pipe (435).

10. A large-capacity, low-loss green transformer using high-temperature superconducting wire as described in claim 9, characterized in that, The input terminals of the electric push cylinder (409), the return water pump (512), and the water delivery pump (522) are electrically connected to the output terminal of the controller, and the input terminal of the controller is electrically connected to the output terminal of the external power supply.

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