Oil-immersed transformer with explosion-proof protection structure

Abstract

This invention relates to the field of oil-immersed transformer technology and discloses an oil-immersed transformer with an explosion-proof protection structure. The transformer includes a placement block with multiple movable components on its top, each component having a fixedly mounted oil-immersed transformer body. This invention provides reliable explosion-proof protection and convenient, efficient maintenance. An explosion-proof external protection box is installed on the front of the transformer body, along with a rotatable opening and closing plate and fixed components, forming a closed explosion-proof protection box. This effectively prevents the leakage of high-temperature and high-pressure oil and gas caused by internal faults, reducing the risk of explosion and fire from a physical structure perspective and ensuring the safety of equipment and surrounding personnel. The opening and closing plate, through the cooperation of a handle, lever, and locking rod, allows for quick opening and locking without special tools. Workers can periodically and visually inspect the internal explosion-proof equipment, terminals, and insulation components, ensuring both safety and maintainability in the explosion-proof protection, comprehensively improving the safety and stability of transformer operation.

Description

Technical Field

[0001] This invention relates to the field of oil-immersed transformer technology, and more particularly to an oil-immersed transformer with an explosion-proof protection structure. Background Technology

[0002] Oil-immersed transformers rely on insulating oil for insulation and cooling, but internal short circuits can generate gas and increase pressure, posing a risk of explosion and fire. Explosion-proof protection enclosures, through high-strength shells, rapid pressure relief, directional hazard mitigation, and fireproof isolation, control accidents within the enclosure, protecting equipment and personnel safety. This is an essential safety design for high-voltage, high-capacity oil-immersed transformers.

[0003] Existing traditional oil-immersed transformers suffer from several drawbacks. Their explosion-proof protection boxes are typically enclosed, single-unit designs, lacking convenient maintenance access. This prevents staff from quickly opening them to inspect internal explosion-proof devices and wiring, and internal faults can lead to high-pressure oil and gas leaks, posing a safety hazard. Furthermore, oil-immersed transformers are mostly fixed installations, lacking autonomous relocation mechanisms. This hinders their ability to be quickly deployed based on changes in regional power load or temporary power needs, resulting in insufficient power supply flexibility. The protective structure of the cooling fan on the top of the transformer is also fixed, making it prone to dust accumulation and damage during long-term outdoor operation. Maintenance and disassembly are cumbersome, leading to decreased ventilation and heat dissipation efficiency and affecting the transformer's stable operation. Finally, the external connection mechanism of oil-immersed transformers is fixed at a height, resulting in poor compatibility with external electrical equipment. Installation and maintenance require working at height, making operations difficult and inefficient.

[0004] To address the aforementioned issues, an oil-immersed transformer with an explosion-proof protection structure is proposed. Summary of the Invention

[0005] To overcome the above shortcomings, this invention provides an oil-immersed transformer with an explosion-proof protection structure, aiming to improve the problems of existing traditional oil-immersed transformers, such as difficult maintenance of the explosion-proof enclosure, fixed and immovable equipment, cumbersome maintenance of the fan protection structure, and poor adaptability of the fixed external power connection mechanism, which easily lead to safety hazards and have low power supply flexibility and operating efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an oil-immersed transformer with an explosion-proof protection structure, comprising a placement block, a plurality of movable components disposed on the top of the placement block, an oil-immersed transformer body fixedly mounted on the top of each of the movable components, a plurality of low-voltage bushings fixedly connected to the rear top of the oil-immersed transformer body, a plurality of high-voltage bushings fixedly connected to the front top of the oil-immersed transformer body, an oil conservator fixedly mounted on the top left side of the oil-immersed transformer body, an explosion-proof protection external box fixedly connected to the front side of the oil-immersed transformer body, and an opening and closing plate rotatably connected to the inner wall of the explosion-proof protection external box. A handle is fixedly installed on the front right end of the opening and closing plate. Two fixing components are provided on the right side of the inner wall of the opening and closing plate. A radiator is fixedly connected to the rear side of the oil-immersed transformer body. A lifting component is provided on the top rear side of the placement block. Multiple mounting plates are fixedly connected to the top middle of the oil-immersed transformer body. A fan is fixedly connected to the top of the mounting plate. A maintenance component is provided on the inner wall of the fan. A main transformer terminal box is fixedly connected to the front left end of the oil-immersed transformer body. A fixing block is fixedly installed on the top of the lifting component. A second power connection mechanism is fixedly installed on the top of the inner wall of the fixing block. A third power connection mechanism is fixedly installed on the front side of the inner wall of the second power connection mechanism. The lifting assembly includes a second mounting frame, which is fixedly connected to the top rear side of the placement block. A mounting block is fixedly connected to the middle of the top rear side of the placement block. An electric push rod is fixedly connected to the left front end of the top of the mounting block. A gear rod is fixedly connected to the output end of the electric push rod. A mounting seat is fixedly connected to the middle of the top front side of the mounting block. A mounting seat is fixedly connected to the right front end of the top of the mounting block. A mounting seat is fixedly connected to the rear side of the top of the mounting block. A gear four is rotatably connected to the front inner wall of the mounting seat two. A gear five is rotatably connected to the rear inner wall of the mounting seat two. An electric sleeve is fixedly connected to the top rear inner wall of the placement block. A gear rod is slidably connected to the inner wall of the electric sleeve.

[0007] As a further description of the above technical solution: A grounding plate is fixedly connected to the left side of the placement block, and a grounding device is fixedly installed on the top of the grounding plate. A power frame one is fixedly connected to the front side of the placement block, and a power frame two is fixedly connected to the rear side of the placement block. A power connection mechanism one is fixedly installed on the inner wall of the power frame two. A ladder is fixedly installed in the middle of the top left side of the oil-immersed transformer body, and a fixing frame is fixedly installed at the front end of the top left side of the oil-immersed transformer body.

[0008] As a further description of the above technical solution: The maintenance component includes multiple fixing rings, each fixedly connected to the top of the fan. A protective plate is fixedly installed on the inner wall of each fixing ring. Multiple push rods are slidably connected to the inner wall of each fixing ring. A limit plate is fixedly connected to the bottom of each push rod. A rotating rod is rotatably connected to the bottom of the inner wall of the limit plate. A fixing rod is rotatably connected to the inner wall of the rotating rod. Multiple springs are fixedly installed on the inner wall of each fixing ring.

[0009] As a further description of the above technical solution: The fixing assembly includes two fixing plates, both of which are fixedly connected to the inner wall of the opening and closing plate. A locking rod is snapped into the inner wall of the fixing plate, and a connecting rod is fixedly installed on the right side of the outer wall of the locking rod. A connecting rod is fixedly installed on the right side of the connecting rod. Connecting plates are rotatably connected to the adjacent sides of the two connecting rods. Two fixing plates are fixedly installed on the front right end of the explosion-proof protective external box. A fixing ring is fixedly connected to the inner wall of the fixing plate, and a locking rod is inserted into the inner wall of the fixing ring.

[0010] As a further description of the above technical solution: The movable component includes multiple connecting rods three, each fixedly connected to the four bottom corners of the oil-immersed transformer body. Each connecting rod three has a threaded rod one rotatably connected to its rear side. Each threaded rod one has a gear two fixedly connected to a nearby side. A mounting frame one is rotatably connected to the inner wall of the gear two. A motor is fixedly connected to the inner wall of the mounting frame one. The output end of the motor is fixedly connected to the gear one. Each connecting rod three has a threaded rod two rotatably connected to its front side. Each threaded rod two has a gear three fixedly connected to a nearby side. Two threaded blocks are threadedly connected to the outer wall of each threaded rod two. A rotating rod two is rotatably connected to the bottom of the inner wall of each of the two threaded blocks. A moving wheel is fixedly connected to the top of each connecting rod three. Each connecting rod three passes through a fixing plate three. Placement seats are fixedly connected to the four bottom corners of the fixing plate three.

[0011] As a further description of the above technical solution: The second rack and the fourth gear are meshed together, and the second rack passes through the inner wall of the mounting base.

[0012] As a further description of the above technical solution: The rack and gear five are meshed together. The rack is fixedly connected to the bottom of the fixing block and passes through the top of the inner wall of the mounting frame two.

[0013] As a further description of the above technical solution: Multiple springs are fixedly installed between the inner side of the fixed ring and the outer side of the fixed rod. Multiple rotating rods are rotatably connected to the inner wall of the fixed ring. Multiple fixed rods are slidably connected to the inner wall of the fixed ring. Multiple fixed rods are slidably connected to the inner wall of the protective plate.

[0014] As a further description of the above technical solution: Multiple gears are rotatably connected to the front side of the inner wall of the mounting frame, and multiple rotating rods are rotatably connected to the inner wall of the connecting rod on the same side as the connecting rod.

[0015] As a further description of the above technical solution: The multiple gears 2 and 3 are meshed with gear 1, and the multiple threaded rods 1 are all threadedly connected to the inner wall of the threaded block.

[0016] The present invention has the following beneficial effects: 1. In this invention, the explosion-proof protection is reliable, and the maintenance is convenient and efficient. An explosion-proof protection external box is set on the front side of the transformer body, which is equipped with a rotatable opening and closing plate and fixing components to form a closed explosion-proof protection box. It can effectively prevent the leakage of high temperature and high pressure oil and gas caused by internal faults, reduce the risk of explosion and fire from the physical structure, and ensure the safety of equipment and surrounding personnel. The opening and closing plate can be quickly opened and locked by the cooperation of handle, latch, and locking rod. It can be opened quickly without special tools. The staff can regularly and intuitively inspect the internal explosion-proof equipment, wiring terminals and insulation components, and promptly detect hidden dangers such as damage, loosening and aging, so as to achieve preventive maintenance. It breaks the limitation of traditional explosion-proof boxes being closed and unable to be quickly inspected, simplifies the maintenance process, shortens the maintenance time, and makes the explosion-proof protection both safe and maintainable, thus comprehensively improving the safety and stability of transformer operation.

[0017] 2. In this invention, the device is flexible and convenient to move, adapting to various power supply scenarios. A moving component is installed at the bottom of the transformer. Through the meshing transmission of gears one, two, and three driven by a motor, threaded rod one, threaded rod two, and threaded block are driven to cooperate in action, realizing the lifting and lowering of the moving wheels. When the equipment is deployed, the moving wheels are retracted, and the stable support of the mounting base ensures stable operation. When relocating, the moving wheels are lowered, allowing for easy movement without the need for large hoisting equipment. This enables the transformer to be quickly transferred and deployed according to regional power demand, temporary power supply for projects, emergency repairs, and other scenarios, breaking through the limitations of traditional fixed installation. It effectively improves equipment utilization and grid power supply response speed, meets dynamic and diversified power demand, enhances the flexibility of grid dispatch, and reduces the cost and difficulty of temporary power supply and emergency deployment.

[0018] 3. In this invention, the fan is easy to maintain and has stable heat dissipation efficiency. A dedicated maintenance component is set at the top cooling fan, which consists of a fixing ring, a protective plate, a push rod, a spring, and a fixing rod to form a detachable protective structure. This effectively prevents debris from entering the fan and extends its service life. During maintenance, simply press the push rod to unlock the fixing rod, and quickly remove and install the protective plate for cleaning and repair. The operation is simple and quick, without the need to completely disassemble the fan components. This ensures smooth fan ventilation and can continuously and stably remove the heat generated by the core and windings, keeping the transformer temperature rise within the standard range. This avoids problems such as accelerated insulation aging and short circuit faults caused by poor heat dissipation, ensuring long-term efficient heat dissipation of the transformer and improving the stability and service life of the equipment.

[0019] 4. In this invention, the connection height is adjustable, making installation and maintenance more efficient. A lifting assembly is installed at the rear of the transformer. An electric push rod drives rack two to mesh with gear four, which in turn drives gear five to transmit power to rack one. This allows for precise height adjustment of the top fixing block and connection mechanisms two and three. It can be freely adapted to the installation height and wiring angle of external power-connecting equipment, eliminating the need for on-site modification of the support frame or high-altitude risky operations. This significantly reduces the difficulty of connecting external equipment and improves installation efficiency. When maintaining external power-connecting equipment, the connection mechanism can be lowered to a suitable operating height for easy wiring, testing, and component replacement, eliminating the safety risks of high-altitude operations and shortening power outage maintenance time. The lifting action is smooth and the positioning is accurate, adapting to different specifications of external equipment. This improves the versatility, convenience, and safety of transformer-grid connection, ensuring stable and efficient power transmission. Attached Figure Description

[0020] Figure 1 This is a perspective view of the placement block of an oil-immersed transformer with an explosion-proof protection structure proposed in this invention; Figure 2 This is a schematic diagram of the power frame structure of an oil-immersed transformer with an explosion-proof protection structure proposed in this invention. Figure 3 This is a schematic diagram of the oil conservator structure of an oil-immersed transformer with an explosion-proof protection structure proposed in this invention. Figure 4 This is a schematic diagram of the high-voltage bushing structure of an oil-immersed transformer with an explosion-proof protection structure proposed in this invention. Figure 5 This is a schematic diagram of the low-voltage bushing structure of an oil-immersed transformer with an explosion-proof protection structure proposed in this invention. Figure 6 This is a schematic diagram of the explosion-proof protection external enclosure structure of an oil-immersed transformer with an explosion-proof protection structure proposed in this invention; Figure 7 This is a schematic diagram of the fixed assembly structure of an oil-immersed transformer with an explosion-proof protection structure proposed in this invention. Figure 8 This is a schematic diagram of the moving component structure of an oil-immersed transformer with an explosion-proof protection structure proposed in this invention. Figure 9 This is a schematic diagram of the threaded block structure of an oil-immersed transformer with an explosion-proof protection structure proposed in this invention. Figure 10 This is a schematic diagram of the fan structure of an oil-immersed transformer with an explosion-proof protection structure proposed in this invention. Figure 11 This is a schematic cross-sectional view of the protective plate of an oil-immersed transformer with an explosion-proof protection structure proposed in this invention.

[0021] Legend: 1. Placement block; 2. Oil-immersed transformer body; 3. Explosion-proof protection external enclosure; 4. Fan; 5. Mounting plate one; 6. Maintenance components; 601. Fixing ring one; 602. Protective plate; 603. Push rod; 604. Limiting plate; 605. Rotating rod one; 606. Spring; 607. Fixing rod; 7. Fixing components; 701. Fixing plate one; 702. Clamping rod; 703. Connecting rod one; 704. Connecting rod two; 705. Fixing plate two; 706. Connecting plate one; 707. Fixing ring two; 708. Locking rod; 8. Moving component; 801. Connecting rod three; 802. Mounting frame one; 803. Motor; 804. Gear one; 805. Gear two; 806. Threaded rod one; 807. Gear three; 808. Threaded rod two; 809. Threaded block; 810. Rotating rod two; 811. Moving wheel; 812. Fixing plate three; 813. Placement base; 9. Lifting assembly; 901. Mounting frame two; 902. Mounting block; 903. Power conduit; 904. Gear rack one; 905. Electric push rod; 906. Mounting seat one; 907. Gear rack two; 908. Gear four; 909. Mounting seat two; 910. Gear five; 911. Mounting seat three; 10. Opening plate; 11. Handle; 12. Low-voltage bushing; 13. High-voltage bushing; 14. Oil conservator; 15. Fixing frame; 16. Main transformer terminal box; 17. Ladder; 18. Radiator; 19. Grounding plate; 20. Grounding device; 21. Power rack one; 22. Power rack two; 23. Connection mechanism one; 24. Fixing block; 25. Connection mechanism two; 26. Connection mechanism three. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Reference Figure 1-11 One embodiment of the present invention provides an oil-immersed transformer with an explosion-proof protection structure, comprising a placement block 1, a plurality of movable components 8 disposed on the top of the placement block 1, an oil-immersed transformer body 2 fixedly mounted on the top of each of the movable components 8, a plurality of low-voltage bushings 12 fixedly connected to the rear top of the oil-immersed transformer body 2, a plurality of high-voltage bushings 13 fixedly connected to the front top of the oil-immersed transformer body 2, an oil conservator 14 fixedly mounted on the top left side of the oil-immersed transformer body 2, and an explosion-proof protective outer casing fixedly connected to the front side of the oil-immersed transformer body 2. The inner wall of the explosion-proof outer enclosure 3 is rotatably connected to an opening and closing plate 10. A handle 11 is fixedly installed on the front right end of the opening and closing plate 10. Two fixing components 7 are provided on the right side of the inner wall of the opening and closing plate 10. A radiator 18 is fixedly connected to the rear side of the oil-immersed transformer body 2. A lifting component 9 is provided on the top rear side of the placement block 1. Multiple mounting plates 5 are fixedly connected to the top middle of the oil-immersed transformer body 2. A fan 4 is fixedly connected to the top of the mounting plates 5. A maintenance component 6 is provided on the inner wall of the fan 4. A handle 11 is fixedly connected to the front left end of the oil-immersed transformer body 2. The main transformer terminal box 16 has a fixed block 24 fixedly installed on the top of the lifting assembly 9. A second power connection mechanism 25 is fixedly installed on the top inner wall of the fixed block 24, and a third power connection mechanism 26 is fixedly installed on the front inner wall of the second power connection mechanism 25. This design is to use the placement block 1 as the overall support base. Multiple sets of moving assemblies 8 are evenly installed on the top of the placement block 1. The top of the moving assemblies 8 is rigidly fixed to the oil-immersed transformer body 2, realizing the dual functions of equipment support and autonomous movement. Multiple sets of low-voltage bushings 12 are fixed to the rear side of the top of the oil-immersed transformer body 2, and multiple sets of high-voltage bushings are fixed to the front side. 13. Complete the transformation and transmission of high and low voltage electrical energy; the top left side is fixed with an oil conservator 14 to compensate for the volume change of insulating oil due to thermal expansion and contraction, and to ensure the insulation, cooling and arc extinguishing effects. The front side of the oil-immersed transformer body 2 is fixed with an explosion-proof protection external box 3. The inner wall of the box is rotatably connected with an opening and closing plate 10. A handle 11 is installed on the right side of the front side of the opening and closing plate 10. Two sets of fixing components 7 are set on the right side of the inner wall of the opening and closing plate 10 to form an explosion-proof protection structure that can be opened and closed quickly. This not only prevents the leakage of high-voltage oil and gas in the internal fault, but also facilitates the quick manual inspection and maintenance of internal equipment, greatly improving safety protection and maintenance efficiency.

[0024] The lifting assembly 9 includes a second mounting frame 901, which is fixedly connected to the top rear side of the placement block 1. A mounting block 902 is fixedly connected to the middle of the top rear side of the placement block 1. An electric push rod 905 is fixedly connected to the left front end of the top of the mounting block 902. A gear 907 is fixedly connected to the output end of the electric push rod 905. A first mounting seat 906 is fixedly connected to the middle of the top front side of the mounting block 902. A third mounting seat 911 is fixedly connected to the right front end of the top of the mounting block 902. A second mounting seat 909 is fixedly connected to the rear side of the top of the mounting block 902. A fourth gear 908 is rotatably connected to the front inner wall of the second mounting seat 909. A fifth gear 910 is rotatably connected to the rear inner wall of the second mounting seat 909. A power bushing 903 is fixedly connected to the rear top inner wall of the placement block 1. A gear 904 is slidably connected to the inner wall of the power bushing 903. This design is for oil-immersed transformers. A heat sink 18 is fixed to the rear of the main body 2, which, together with the fan 4 on the top mounting plate 5, forms a forced air cooling system. The inner wall of the fan 4 is equipped with a maintenance component 6, which allows for quick disassembly and assembly of the protective structure, preventing dust and debris from affecting the ventilation and heat dissipation efficiency. A lifting component 9 is installed on the top rear side of the placement block 1, and a fixed block 24 is installed on the top of the lifting component 9. A second power connection mechanism 25 is installed on the top of the inner wall of the fixed block 24, and a third power connection mechanism 26 is installed on the front side. The height of the power connection mechanism is adjustable through the lifting component 9 to adapt to the docking requirements of different external equipment. A main transformer terminal box 16 is set on the front left side of the main body 2, which integrates control and wiring functions. The second mounting frame 901 of the lifting component 9 is fixed to the placement block 1. The electric push rod 905 on the mounting block 902 drives the second gear 907, which, together with the fourth gear 908, the fifth gear 910 and the first gear 904, achieves precise lifting of the power connection mechanism, reducing the difficulty of installing and maintaining external equipment.

[0025] A grounding plate 19 is fixedly connected to the left side of the placement block 1, and a grounding device 20 is fixedly installed on the top of the grounding plate 19. A power rack 21 is fixedly connected to the front side of the placement block 1, and a power rack 22 is fixedly connected to the rear side of the placement block 1. A power connection mechanism 23 is fixedly installed on the inner wall of the power rack 22. A ladder 17 is fixedly installed in the middle of the top left side of the oil-immersed transformer body 2, and a fixing frame 15 is fixedly installed at the front end of the top left side of the oil-immersed transformer body 2.

[0026] In this embodiment, a grounding plate 19 is fixed on the left side of the placement block 1, and a grounding device 20 is installed on the top of the grounding plate 19. This can quickly conduct the static electricity and fault current generated by the transformer operation to the ground, avoiding the risk of equipment breakdown and electric shock to personnel, and improving operational safety. A power rack 1 21 is fixed on the front side of the placement block 1, and a power rack 22 is fixed on the rear side. A grounding mechanism 1 23 is installed on the inner wall of the power rack 22, forming a multi-level grounding support structure that can adapt to different specifications of external wiring equipment. A ladder 17 is installed in the middle of the top left side of the oil-immersed transformer body 2, and a fixed frame 15 is installed at the front end. This provides a safe climbing and support platform for workers to inspect high-altitude components such as high-voltage bushings 13 and oil tanks 14. Combined with the quick-opening structure of the explosion-proof external box 3, a full-dimensional maintenance channel is constructed, which comprehensively improves the convenience of equipment maintenance.

[0027] Maintenance component 6 includes multiple retaining rings 601, all of which are fixedly connected to the top of fan 4. A protective plate 602 is fixedly installed on the inner wall of retaining ring 601. Multiple push rods 603 are slidably connected to the inner wall of retaining ring 601. A limit plate 604 is fixedly connected to the bottom of the multiple push rods 603. A rotating rod 605 is rotatably connected to the bottom of the inner wall of the limit plate 604. A fixing rod 607 is rotatably connected to the inner wall of the rotating rod 605. Multiple springs 606 are fixedly installed on the inner wall of retaining ring 601.

[0028] In this embodiment, the maintenance component 6 on the top of the fan 4 uses a fixing ring 601 as the mounting base, and a protective plate 602 is fixed to the inner wall to effectively block rainwater, dust, and debris from entering the fan 4, preventing blade jamming and motor damage due to moisture. Multiple sets of push rods 603 are slidably connected to the inner wall of the fixing ring 601. The bottom of the push rod 603 is connected to a limiting plate 604. The limiting plate 604 is connected to a fixing rod 607 through a rotating rod 605. A spring 606 is installed between the fixing ring 601 and the fixing rod 607. Pressing the push rod 603 will drive the rotating rod 605 to deflect, causing the fixing rod 607 to detach from the protective plate 602 for quick disassembly and cleaning. When the push rod 603 is released, the spring 606 automatically resets and locks. The operation is simple and quick, ensuring the ventilation efficiency of the fan 4 and stabilizing the heat dissipation effect of the transformer.

[0029] The fixing assembly 7 includes two fixing plates 701, both of which are fixedly connected to the inner wall of the opening and closing plate 10. A locking rod 702 is snapped into the inner wall of the fixing plate 701. A connecting rod 703 is fixedly installed on the right side of the outer wall of the locking rod 702. A connecting rod 704 is fixedly installed on the right side of the connecting rod 703. A connecting plate 706 is rotatably connected to the adjacent side of the two connecting rods 704. Two fixing plates 705 are fixedly installed on the front right end of the explosion-proof protective external box 3. A fixing ring 707 is fixedly connected to the inner wall of the fixing plate 705. A locking rod 708 is inserted into the inner wall of the fixing ring 707.

[0030] In this embodiment, the fixing component 7 of the explosion-proof protection external box 3 uses a fixing plate 701 as the fixing end, and a locking rod 702 is snapped into the inner wall. The locking rod 702 is connected to a connecting rod 704 via a connecting rod 703. The two sets of connecting rods 704 are linked together by a connecting plate 706. A fixing plate 705 is set at the front right end of the explosion-proof protection external box 3, and a locking rod 708 is inserted into the inner wall fixing ring 707 to form a double locking structure. Pulling the handle 11 can quickly rotate the opening and closing plate 10, and pushing the locking rod 708 can lock the locking rod 702. The opening and closing plate 10 can be quickly opened and locked without special tools. The staff can check the internal explosion-proof device and wiring status at any time, eliminate safety hazards in a timely manner, and take into account both explosion-proof protection and convenient maintenance.

[0031] The movable component 8 includes multiple connecting rods 801, which are fixedly connected to the four bottom corners of the oil-immersed transformer body 2. Each connecting rod 801 has a threaded rod 806 rotatably connected to its rear side. A gear 805 is fixedly connected to a nearby side of each threaded rod 806. A mounting frame 802 is rotatably connected to the inner wall of the gear 805. A motor 803 is fixedly connected to the inner wall of the mounting frame 802. A gear 804 is fixedly connected to the output end of the motor 803. The multiple connecting rods... Each connecting rod 3 801 has a threaded rod 2 808 rotatably connected to its front side. A gear 3 807 is fixedly connected to the adjacent side of each threaded rod 2 808. Two threaded blocks 809 are threadedly connected to the outer wall of the threaded rod 2 808. A rotating rod 2 810 is rotatably connected to the bottom of the inner wall of the two threaded blocks 809. A movable wheel 811 is fixedly connected to the top of the connecting rod 3 801. A fixing plate 3 812 passes through each of the connecting rods 3 801. A placement seat 813 is fixedly connected to the four bottom corners of the fixing plate 3 812.

[0032] In this embodiment, the movable components 8 at the four corners of the bottom of the oil-immersed transformer body 2 are supported by connecting rod 3 801. The motor 803 in the mounting frame 1 802 drives gear 1 804, which meshes and drives gear 2 805 and gear 3 807 to rotate synchronously, thereby driving threaded rod 1 806 and threaded rod 2 808 to rotate. The threaded block 809 on the outer wall of the threaded rod drives the connecting rod 3 801 to rise and fall through the rotating rod 2 810, realizing the switching of the moving wheel 811. When the equipment is running, the moving wheel 811 is retracted, and the placement seat 813 at the bottom of the fixed plate 3 812 provides stable support. When the equipment is moved, the moving wheel 811 is lowered, and the equipment can be moved quickly without hoisting. This adapts to temporary power supply and emergency power supply scenarios, improving the flexibility of equipment deployment.

[0033] The rack 2 (907) and gear 4 (908) are meshed. The rack 2 (907) passes through the inner wall of the mounting base 1 (906). This design ensures precise meshing between the rack 2 (907) and gear 4 (908) within the lifting assembly 9. The mounting base 1 (906) provides guidance and support for the rack 2 (907), preventing transmission misalignment. The electric push rod 905 pushes the rack 2 (907) in linear motion, driving the gear 4 (908) to rotate, providing initial power to the lifting system and ensuring stable and precise transmission. This meshing structure has high transmission efficiency and low wear. Combined with the secondary transmission of gear 5 (910) and rack 1 (904), it enables smooth lifting of the power connection mechanism 25 and power connection mechanism 3 (26), precisely adapting to the height of external equipment, reducing docking difficulty, and improving installation and maintenance efficiency.

[0034] The rack 904 and gear 910 are meshed. The rack 904 is fixedly connected to the bottom of the fixed block 24 and passes through the top of the inner wall of the mounting frame 901. This design is for the rack 904 and gear 910 to mesh and drive within the lifting assembly 9. The rack 904 is fixed to the bottom of the fixed block 24 and passes through the top of the inner wall of the mounting frame 901. Gear 910 rotates synchronously with gear 908, driving the rack 904 to slide up and down along the power bushing 903. The power bushing 903 provides vertical guidance for the rack 904, preventing swaying and tilting during lifting. It converts horizontal power into vertical lifting force, realizing stepless height adjustment of the power connection mechanism. It can be freely adjusted according to the size of the external equipment, eliminating the need for high-altitude operations, eliminating safety risks, shortening the installation and maintenance time of power connection, and improving the efficiency of transformer grid connection.

[0035] Multiple springs 606 are fixedly installed between the inner side of the fixing ring 601 and the outer side of the fixing rod 607. Multiple rotating rods 605 are rotatably connected to the inner wall of the fixing ring 601, and multiple fixing rods 607 are slidably connected to the inner wall of the fixing ring 601 and the inner wall of the protective plate 602. This design is to ensure that the two ends of the springs 606 in the maintenance component 6 are fixed to the inner side of the fixing ring 601 and the outer side of the fixing rod 607 respectively, providing a restoring force for the fixing rod 607 and ensuring protection. Plate 602 is securely locked. Rotary rod 605 is rotatably connected to the inner wall of fixed ring 601, serving as the transmission hub between push rod 603 and fixed rod 607. Pressing push rod 603 will cause rotary rod 605 to deflect, driving fixed rod 607 to slide away from protective plate 602. Fixed rod 607 is simultaneously slidably connected to fixed ring 601 and the inner wall of protective plate 602, forming a plug-in locking structure. Disassembly and assembly can be completed without tools, quickly cleaning and maintaining fan 4 protective plate 602, ensuring ventilation and heat dissipation efficiency, and extending the service life of fan 4.

[0036] Multiple gears 807 are rotatably connected to the front inner wall of the mounting frame 802, and multiple rotating rods 810 are rotatably connected to the inner wall of the connecting rod 801. This design allows the gears 807 of the moving component 8 to be rotatably connected to the front inner wall of the mounting frame 802, forming a three-stage meshing transmission with gears 804 and 805, so that power is evenly transmitted to the front and rear sets of threaded rods. The rotating rods 810 are rotatably connected to the inner wall of the connecting rod 801, serving as a movable connecting piece between the threaded block 809 and the connecting rod 801, converting the rotational motion of the threaded rod into the lifting motion of the connecting rod 801, so as to achieve smooth retraction and extension of the moving wheel 811. This transmission structure has uniform force distribution and stable operation, avoids jamming of the moving wheel 811 during lifting, ensures the reliability of transformer movement and fixation, and adapts to the needs of rapid deployment in multiple scenarios.

[0037] Multiple gears 805 (second gear), 807 (third gear), and 804 (first gear) are meshed together. Multiple threaded rods 806 are threaded onto the inner wall of the threaded block 809. This design allows gears 805 (second gear), 807 (third gear), and 804 (first gear) of the moving component 8 to mesh together, forming a closed-loop transmission system. The threaded rods 806 are threaded onto the inner wall of the threaded block 809. The rotation of the gears drives the threaded rods to rotate synchronously, driving the threaded block 809 to move linearly. The three-stage gear meshing ensures efficient and synchronous power transmission. The four corner moving components 8 move synchronously, preventing the transformer from tilting during lifting and lowering. The threaded rods and threaded blocks have high precision and good self-locking. The moving wheels 811 are locked securely during equipment operation, and lifting and lowering are smooth during relocation. This design balances operational stability and mobility flexibility, meeting dynamic power demand.

[0038] Working Principle: The equipment uses the placement block 1 as the basic support platform, with the oil-immersed transformer body 2 as the core transformer unit. During operation, high-voltage electrical energy is input into the body 2 through the high-voltage bushing 13. After electromagnetic transformation through the iron core and windings, low-voltage electrical energy is output through the low-voltage bushing 12, realizing the conversion of high and low voltage electrical energy in the power grid. The oil conservator 14 monitors and compensates for the thermal expansion and contraction of the insulating oil in real time, ensuring that the insulating oil always fills the gap between the windings and the iron core. It undertakes the three core functions of insulation isolation, heat conduction, and arc extinguishing, avoiding faults such as winding short circuits and insulation breakdown. The radiator 18 and the fan 4 form a forced air cooling system, continuously removing the heat generated by the operation of the iron core and windings, controlling the transformer temperature rise within the standard range, and ensuring the long-term stable operation of the equipment.

[0039] The explosion-proof external enclosure 3 tightly wraps the core areas such as the explosion-proof device and the main transformer terminal box 16 on the front side of the transformer body 2, forming a high-strength physical protective barrier. When a short circuit or insulation breakdown fault occurs inside, it can effectively prevent the leakage of high-temperature and high-pressure oil and gas, prevent the spread of explosion and fire accidents, and protect the safety of surrounding equipment and personnel. The opening and closing plate 10 is rotatably connected to the explosion-proof external enclosure 3 through a rotating shaft. The locking rod 702 of the fixing component 7 is locked into the inner wall of the fixing plate 701, and the locking rod 708 is inserted into the fixing ring 707 to form a double mechanical lock, so that the enclosure is completely sealed when the equipment is running, and the explosion-proof performance meets the standards. When maintenance is required, the staff does not need special tools. They only need to pull out the locking rod 708 and pull the handle 11 to quickly rotate the opening and closing plate 10 to directly check the internal explosion-proof device, wiring, and insulation component status, and promptly detect safety hazards such as loosening, aging, and damage, so as to achieve preventive maintenance and reduce the risk of failure and explosion.

[0040] When the equipment is in a fixed position, the motor 803 of the moving component 8 starts, driving the output gear 1 804 to rotate. Through gear meshing, the gears 2 805 and 3 807 rotate synchronously, which in turn drives the threaded rod 1 806 and threaded rod 2 808 to rotate in the same direction. The threaded block 809 on the outer wall of the threaded rod moves linearly inward along the thread. The rotating rod 2 810 pulls the connecting rod 3 801 upward, causing the moving wheel 811 to retract and lift off the ground. The placement seat 813 at the bottom of the fixed plate 3 812 fits tightly against the foundation ground, forming a large area of ​​stable support, preventing the equipment from shaking or shifting during operation, and improving the accuracy of the transformer. When temporary relocation, emergency power supply, or load adjustment is required, the motor 803 rotates in the opposite direction, the threaded block 809 moves outward, pushing the connecting rod 3 801 downward, the moving wheel 811 lowers to contact the ground, and the placement seat 813 lifts up. The staff can easily push the transformer to move as a whole without the need for large hoisting equipment, quickly completing the deployment and greatly improving the flexibility of power supply and equipment utilization.

[0041] During equipment operation, fan 4 runs continuously, accelerating airflow around radiator 18 and enhancing the cooling effect of insulating oil. The protective plate 602 of maintenance component 6 is fixed to the top of fan 4, effectively preventing rainwater, dust, branches, and other debris from entering the fan 4, preventing blade jamming, motor moisture-induced short circuits, and extending the service life of fan 4. When fan 4 needs cleaning or maintenance, the operator presses the push rod 603, pushing the limit plate 604 downwards, causing the rotating rod 605 to rotate around the inner wall of the fixing ring 601, thereby driving the fixing rod 607 to compress the spring 606 and slide inwards, disengaging from the inner wall of the protective plate 602. The protective plate 602 can then be quickly removed for cleaning and component replacement. After maintenance, the push rod 603 is released, and the elastic force of the spring 606 pushes the fixing rod 607 to automatically reset and re-insert into the inner wall of the protective plate 602 to lock. The entire operation is simple and quick, without the need for complete fan disassembly, ensuring ventilation and heat dissipation efficiency and preventing accelerated insulation aging and short circuits due to poor heat dissipation.

[0042] The lifting assembly 9 provides height adaptive adjustment for external electrical equipment. After the electric push rod 905 is activated, it pushes the output rack 2 907 to move horizontally linearly along the mounting base 1 906. Through meshing transmission, it drives the gear 4 908 to rotate. The gear 4 908 drives the coaxial gear 5 910 to rotate synchronously. The gear 5 910 further meshes and drives the rack 1 904 to slide vertically up and down along the power bushing 903, thereby driving the top fixing block 24, the power connection mechanism 25, and the power connection mechanism 3 26 to precisely lift and lower. The position can be freely adjusted according to the installation height and wiring angle of the external electrical equipment without the need for on-site modification. When constructing supports or performing high-altitude hazardous operations, the transmission mechanism automatically locks after docking, ensuring stable power connection. When maintaining external power connection equipment, the power connection mechanism can be lowered to a suitable operating height, facilitating wiring, testing, and component replacement, eliminating safety risks associated with high-altitude operations, and shortening power outage maintenance time. At the same time, the grounding plate 19 and grounding device 20 conduct static electricity and fault current from the equipment to the ground in real time. The power frame 1 21, power frame 2 22, and power connection mechanism 1 23 form a multi-level power connection support. The ladder 17 and fixed frame 15 provide safety assurance for high-altitude maintenance. All components work together to achieve safe, efficient, and flexible operation of the transformer.

[0043] Through the integrated design of explosion-proof external enclosure 3, fixed component 7, moving component 8, maintenance component 6, and lifting component 9, the safety, flexibility, maintainability, and operating efficiency of oil-immersed transformers are comprehensively improved, adapting to the multi-scenario, high-reliability, and fast-response usage requirements of modern power grids.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is 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. An oil-immersed transformer with an explosion-proof protection structure, comprising a placement block (1), characterized in that: The top of the placement block (1) is provided with multiple moving components (8), and the top of each of the multiple moving components (8) is fixedly installed with an oil-immersed transformer body (2). Multiple low-voltage bushings (12) are fixedly connected to the rear side of the top of the oil-immersed transformer body (2), and multiple high-voltage bushings (13) are fixedly connected to the front side of the top of the oil-immersed transformer body (2). An oil tank (14) is fixedly installed on the top left side of the oil-immersed transformer body (2). An explosion-proof protective external box (3) is fixedly connected to the front side of the oil-immersed transformer body (2). An opening and closing plate (10) is rotatably connected to the inner wall of the explosion-proof protective external box (3). A handle (11) is fixedly installed on the right side of the front side of the opening and closing plate (10). A handle (11) is provided on the right side of the inner wall of the opening and closing plate (10). Two fixed components (7), a radiator (18) is fixedly connected to the rear side of the oil-immersed transformer body (2), a lifting component (9) is provided on the top rear side of the placement block (1), multiple mounting plates (5) are fixedly connected to the middle of the top of the oil-immersed transformer body (2), a fan (4) is fixedly connected to the top of the mounting plate (5), a maintenance component (6) is provided on the inner wall of the fan (4), a main transformer terminal box (16) is fixedly connected to the front left end of the oil-immersed transformer body (2), a fixed block (24) is fixedly installed on the top of the lifting component (9), a second power connection mechanism (25) is fixedly installed on the top of the inner wall of the fixed block (24), and a third power connection mechanism (26) is fixedly installed on the front side of the inner wall of the second power connection mechanism (25). The lifting assembly (9) includes a second mounting frame (901), which is fixedly connected to the top rear side of the placement block (1). A mounting block (902) is fixedly connected to the middle of the top rear side of the placement block (1). An electric push rod (905) is fixedly connected to the left end of the top front side of the mounting block (902). A gear rod (907) is fixedly connected to the output end of the electric push rod (905). A mounting seat (906) is fixedly connected to the middle of the top front side of the mounting block (902). Mounting base three (911) is fixedly connected to the top front right end of the mounting block (902). Mounting base two (909) is fixedly connected to the top rear side of the mounting block (902). Gear four (908) is rotatably connected to the front inner wall of mounting base two (909). Gear five (910) is rotatably connected to the rear inner wall of mounting base two (909). Electric sleeve (903) is fixedly connected to the top rear side of the inner wall of the placement block (1). Tooth rod one (904) is slidably connected to the inner wall of electric sleeve (903).

2. The oil-immersed transformer with explosion-proof protection structure according to claim 1, characterized in that: A grounding plate (19) is fixedly connected to the left side of the placement block (1), and a grounding device (20) is fixedly installed on the top of the grounding plate (19). A power rack (21) is fixedly connected to the front side of the placement block (1), and a power rack (22) is fixedly connected to the rear side of the placement block (1). A power connection mechanism (23) is fixedly installed on the inner wall of the power rack (22). A ladder (17) is fixedly installed in the middle of the top left side of the oil-immersed transformer body (2), and a fixing frame (15) is fixedly installed at the front end of the top left side of the oil-immersed transformer body (2).

3. An oil-immersed transformer with an explosion-proof protection structure according to claim 1, characterized in that: The maintenance component (6) includes multiple fixing rings (601), each of which is fixedly connected to the top of the fan (4). A protective plate (602) is fixedly installed on the inner wall of each fixing ring (601). Multiple push rods (603) are slidably connected to the inner wall of each fixing ring (601). A limit plate (604) is fixedly connected to the bottom of each push rod (603). A rotating rod (605) is rotatably connected to the bottom of the inner wall of the limit plate (604). A fixing rod (607) is rotatably connected to the inner wall of the rotating rod (605). Multiple springs (606) are fixedly installed on the inner wall of each fixing ring (601).

4. An oil-immersed transformer with an explosion-proof protection structure according to claim 1, characterized in that: The fixing component (7) includes two fixing plates (701), both of which are fixedly connected to the inner wall of the opening and closing plate (10). The inner wall of the fixing plate (701) is fitted with a locking rod (702). The outer right side of the locking rod (702) is fixedly installed with a connecting rod (703). The right side of the connecting rod (703) is fixedly installed with a connecting rod (704). The two connecting rods (704) are rotatably connected to a connecting plate (706) on their adjacent sides. The front right end of the explosion-proof protective external box (3) is fixedly installed with two fixing plates (705). The inner wall of the fixing plate (705) is fixedly connected with a fixing ring (707). The inner wall of the fixing ring (707) is inserted with a locking rod (708).

5. An oil-immersed transformer with an explosion-proof protection structure according to claim 1, characterized in that: The moving component (8) includes multiple connecting rods three (801), all of which are fixedly connected to the four bottom corners of the oil-immersed transformer body (2). Each of the multiple connecting rods three (801) has a threaded rod one (806) rotatably connected to its rear side. Each of the multiple threaded rods one (806) has a gear two (805) fixedly connected to a nearby side. The inner wall of the gear two (805) is rotatably connected to a mounting frame one (802). The inner wall of the mounting frame one (802) is fixedly connected to a motor (803). The output end of the motor (803) is fixedly connected to a gear one (804). The multiple connecting rods three (801) are rotatably connected to the rear side of each connecting rod three (801). Each of the connecting rods 3 (801) is rotatably connected to a threaded rod 2 (808) on its front side. Each of the multiple threaded rods 2 (808) is fixedly connected to a gear 3 (807) on one of their adjacent sides. The outer wall of each threaded rod 2 (808) is threadedly connected to two threaded blocks (809). The bottom of the inner wall of each of the two threaded blocks (809) is rotatably connected to a rotating rod 2 (810). The top of each connecting rod 3 (801) is fixedly connected to a moving wheel (811). Each of the multiple connecting rods 3 (801) is penetrated by a fixing plate 3 (812). Each of the four bottom corners of the fixing plate 3 (812) is fixedly connected to a placement seat (813).

6. An oil-immersed transformer with an explosion-proof protection structure according to claim 1, characterized in that: The second rack (907) and the fourth gear (908) are meshed together, and the second rack (907) passes through the inner wall of the first mounting base (906).

7. An oil-immersed transformer with an explosion-proof protection structure according to claim 1, characterized in that: The first rack (904) and the fifth gear (910) are meshed together. The first rack (904) is fixedly connected to the bottom of the fixing block (24). The first rack (904) passes through the top of the inner wall of the second mounting frame (901).

8. An oil-immersed transformer with an explosion-proof protection structure according to claim 3, characterized in that: Multiple springs (606) are fixedly installed between the inner side of the fixing ring (601) and the outer side of the fixing rod (607). Multiple rotating rods (605) are rotatably connected to the inner wall of the fixing ring (601). Multiple fixing rods (607) are slidably connected to the inner wall of the fixing ring (601). Multiple fixing rods (607) are slidably connected to the inner wall of the protective plate (602).

9. An oil-immersed transformer with an explosion-proof protection structure according to claim 5, characterized in that: Multiple gears (807) are rotatably connected to the front side of the inner wall of the mounting frame (802), and multiple rotating rods (810) are rotatably connected to the side of the inner wall of the connecting rod (801) near the same side.

10. An oil-immersed transformer with an explosion-proof protection structure according to claim 5, characterized in that: The multiple gears 2 (805), 3 (807) and 1 (804) are meshed together, and the multiple threaded rods 1 (806) are threaded to the inner wall of the threaded block (809).

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