Voltage transformer with heat dissipation function

Abstract

The invention discloses a voltage transformer with a heat dissipation function, relates to the technical field of transformers, and solves the technical problems of low heat dissipation efficiency and inconvenience in replacement and maintenance in the existing technical scheme. The voltage transformer comprises a main base, a stand column is fixedly mounted on the main base, and a mounting table is fixedly mounted on the stand column; the mounting table is fixedly mounted above the main base, a mutual inductance box is fixedly mounted on the upper wall surface of the mounting table, and a heat dissipation box is fixedly mounted between the upper wall surface of the main base and the lower wall surface of the mounting table. According to the technical scheme, active refrigeration is adopted, environmental restriction is avoided, modular design is adopted, and the heat exchange efficiency is improved; the risk that the performance of a traditional mutual inductor is reduced due to overheating is fundamentally solved; the open-close type iron core body is used, rapid replacement and maintenance are achieved, an operator does not need to disassemble the whole equipment, and the adjustable coil module inside can be directly contacted and replaced only by opening the iron core body; the downtime is greatly shortened, and the economic loss is reduced.

Description

Technical Field

[0001] This invention relates to the field of voltage transformer technology, specifically to a voltage transformer with heat dissipation function. Background Technology

[0002] Voltage transformers, as key equipment in power systems, have the core function of proportionally reducing the voltage of the high-voltage grid to a standard safe value. This provides adaptive voltage signals for measuring instruments, metering devices, and relay protection equipment, thereby enabling real-time monitoring, accurate metering, and reliable protection of the power grid's operating status. As power systems develop towards higher loads and higher reliability, the market demands higher performance stability, measurement accuracy, environmental adaptability, and ease of maintenance from voltage transformers. However, existing traditional voltage transformers have significant limitations in practical applications, specifically as follows: Currently, mainstream traditional oil-immersed voltage transformers primarily rely on natural cooling for heat dissipation. Natural cooling is driven by the temperature difference between the air and the equipment, and heat transfer depends on natural air convection, resulting in slow overall transfer speed and low efficiency. Under extreme environmental conditions, the heat dissipation shortcomings become even more pronounced: in high summer temperatures or enclosed indoor environments, the temperature difference between the equipment and the external environment decreases significantly, severely weakening natural convection and drastically reducing heat dissipation. Furthermore, under full-load operation or short-term overload conditions, the copper losses (generated by current flowing through the coil) and iron losses (generated by alternating magnetic flux in the iron core) inside the transformer increase significantly, generating heat far exceeding the capacity for natural heat dissipation, causing the internal oil temperature to rise rapidly. Excessive temperature not only leads to drift in transformer measurement accuracy and decreased performance stability but also accelerates the aging of insulating oil and the wear and tear of internal components, potentially even causing equipment burnout and threatening the safe operation of the power grid. Traditional voltage transformers employ an integrated, permanently fixed internal structure. Their core component, the iron core, is typically a closed, U-shaped laminated structure, with the coil tightly assembled to the core and lacking a detachable design. When the internal coil fails due to aging, overload, or other reasons, maintenance is extremely cumbersome: the entire device must first be removed from the power grid and transported back to a specialized factory. Then, the transformer body must be removed using hoisting equipment, and the closed iron core structure must be disassembled step by step to access and replace the faulty coil. The entire maintenance process involves multiple complex procedures, which are not only time-consuming (usually several days to weeks) and labor-intensive, but also lead to prolonged equipment downtime, posing a risk of power supply interruption and causing serious economic losses and social impact. In summary, existing traditional voltage transformers are no longer suitable for the operational needs of modern power systems due to two core problems: "low heat dissipation efficiency" and "inconvenient replacement and maintenance." New technical solutions are needed to overcome these bottlenecks. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a voltage transformer with heat dissipation capabilities. Traditional natural cooling methods have limited effectiveness and are heavily dependent on ambient temperature. This invention employs active cooling, overcoming environmental constraints, and utilizes a modular design to improve heat exchange efficiency. It fundamentally solves the risks of performance degradation, accuracy drift, and even burnout caused by overheating in traditional transformers. The use of an openable core allows for rapid replacement and maintenance; operators do not need to disassemble the entire device, but can directly access and replace the internal adjustable coil module simply by opening the core. This significantly reduces downtime and economic losses. The use of series-connectable unit coils facilitates voltage ratio configuration, enabling multi-functionality and reducing costs.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a voltage transformer with heat dissipation function, comprising a main base, a column fixedly mounted on the main base, a mounting platform fixedly mounted on the column, the mounting platform fixedly mounted above the main base, a transformer box fixedly mounted on the upper wall of the mounting platform, a heat dissipation box fixedly mounted between the upper wall of the main base and the lower wall of the mounting platform, a core opening and closing structure installed inside the transformer box, an adjustable coil structure installed inside the transformer box, a box cover fixedly mounted above the transformer box, a cable connection structure provided on the box cover, and an active cooling structure and an oil circulation structure provided inside the heat dissipation box.

[0005] Preferably, the core opening and closing structure includes a pair of core bodies, the pair of core bodies are vertically symmetrical C-shaped structures, the pair of core bodies are provided with corresponding tooth grooves, a guide rail is fixedly installed in the mutual inductance box, the pair of core bodies are slidably installed on the guide rail, and a core driving part is provided in the mutual inductance box.

[0006] Preferably, the core drive unit includes a first motor, a lead screw, and a core seat. The core seat is slidably installed inside the current inductance box and fixedly installed on the lower wall of the core body. The lead screw is rotatably installed inside the current inductance box. A threaded hole is provided on the core seat, and the lead screw is threadedly connected to the core seat. The lead screw is a bidirectional threaded rod, and the threaded holes on the core seats below the core body have opposite directions of rotation. A gear reducer is fixedly installed on the side wall of the current inductance box. The first motor is fixedly installed on the side wall of the current inductance box, and the drive end of the first motor is fixedly connected to the input end of the gear reducer. The output end of the gear reducer is fixedly connected to one end of the lead screw.

[0007] Preferably, the adjustable coil structure includes a coil sleeve, a coil column is fixedly installed inside the mutual inductance box, an installation beam is fixedly installed on the coil column, the coil sleeve is fixedly installed on the installation beam, the coil sleeve is a rectangular structure, and an induction coil is provided on the coil sleeve.

[0008] Preferably, the coil sleeve can be installed in series with adjacent coil sleeves, and the beginning and end of the coil sleeve are respectively connected to two sets of cable connection structures.

[0009] Preferably, the cable connection structure includes an insulating post and a terminal block, which are fixedly installed on the upper wall of the box cover, and the terminal block is electrically connected to the adjustable coil structure.

[0010] Preferably, the oil circulation structure includes a delivery pump, which is fixedly installed inside the heat sink. A delivery pipe is fixedly installed at the output end of the delivery pump, and the output end of the delivery pipe is connected to the lower wall of the current inductance box. A return pipe is fixedly installed on the side wall of the current inductance box, and the output end of the return pipe is connected to the lower end of the side wall of the heat sink. A filter baffle is fixedly installed inside the heat sink.

[0011] Preferably, the active cooling structure includes a refrigerator, which is a compressor refrigerator. The cold end of the refrigerator is provided with a cold pipe, and the hot end of the refrigerator is provided with a heat pipe. The refrigerator is fixedly installed on the upper wall of the main base, the cold pipe is disposed inside the heat dissipation box, and the heat pipe is fixedly installed on the outer wall of the heat dissipation box.

[0012] Preferably, heat dissipation fins are fixedly installed on the side wall of the heat sink, and the heat dissipation fins are connected to the heat pipe.

[0013] Beneficial effects:

[0014] 1. Active cooling and modular heat dissipation, overcoming environmental constraints: Abandoning traditional natural cooling methods, this innovative system employs a compressor-based active cooling structure. Through a highly efficient heat exchange path of "cold pipe-heat pipe-heat dissipation fins," forced heat transfer is achieved. The cold pipes at the cold end of the chiller directly contact the insulating oil inside the heat sink, rapidly absorbing heat from the oil. Even under high summer temperatures, in enclosed environments, or under full load / overload conditions, the oil temperature can be precisely controlled within a safe range. This fundamentally solves the problems of performance degradation, accuracy drift, and burnout risks associated with overheating in traditional instrument transformers, significantly extending equipment lifespan. The equipment adopts a separate modular layout of "heating zone of mutual inductance box - cooling zone of heat dissipation box", which effectively isolates the heating component iron core and coil from the cooling component chiller and oil circulation system to avoid heat conduction interference. At the same time, the heat dissipation box integrates an oil circulation structure, which forces the insulating oil to circulate between the mutual inductance box and the heat dissipation box through a liquid pump. This allows the cooling oil to flow efficiently over the surface of the heating component. In addition, the filter baffle removes impurities from the oil to maintain insulation performance, further improving heat dissipation efficiency and equipment operation safety.

[0015] 2. Openable iron core and modular coils simplify maintenance procedures: The openable iron core enables rapid maintenance: The innovative design of the vertically symmetrical C-shaped iron core, combined with the guide rail and bidirectional screw drive system, first motor, and gear reducer, allows for synchronous opening and closing of the iron core through motor control. When maintenance or coil replacement is required, operators do not need to disassemble the entire equipment; they only need to start the drive system to open the iron core and directly access the internal coil module, significantly shortening maintenance operation time, reducing equipment downtime, and minimizing economic losses caused by downtime. The device adopts an independent coil sleeve design, integrating the induction coil into a rectangular coil sleeve. The coil sleeves can be assembled and installed in series. Users can flexibly increase or decrease the number of coil sleeves to adjust the voltage ratio according to the actual grid voltage level requirements. There is no need to purchase special current transformers for different voltage levels. This not only enhances the versatility and environmental adaptability of the equipment, but also reduces the cost of spare parts and achieves "one machine for multiple uses".

[0016] 3. Structural optimization improves overall reliability and adapts to complex power grid scenarios: The cover is equipped with a cable connection structure consisting of insulating posts and terminals. The insulating posts provide sufficient electrical insulation distance and creepage distance, effectively isolating high-voltage parts from the grounding box and preventing safety accidents such as flashover and breakdown. The terminals ensure that the external cables are firmly connected, reduce contact resistance, avoid local overheating due to poor connection, and protect equipment and personal safety. The equipment adopts a layered support structure of "main base-column-mounting platform". The current transformer box and heat dissipation box are arranged vertically, which is compact and has a high space utilization rate. It can be adapted to various installation environments such as outdoor open-air and indoor enclosed. There is no need to build a special heat dissipation room, which reduces the installation and deployment cost and meets the application needs of different power scenarios. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a voltage transformer with heat dissipation function as described in the present invention.

[0018] Figure 2 This is a first three-dimensional structural diagram of a voltage transformer with heat dissipation function as described in this invention.

[0019] Figure 3 This is a second three-dimensional structural diagram of a voltage transformer with heat dissipation function as described in this invention.

[0020] Figure 4 This is a third three-dimensional structural diagram of a voltage transformer with heat dissipation function as described in this invention.

[0021] Figure 5 This is a first main view structural diagram of a voltage transformer with heat dissipation function as described in this invention.

[0022] Figure 6 This is a second main view cross-sectional structural diagram of a voltage transformer with heat dissipation function as described in this invention.

[0023] Figure 7 This is a top view of the structure of a voltage transformer with heat dissipation function as described in this invention.

[0024] Figure 8 This is a side view of the structure of a voltage transformer with heat dissipation function as described in this invention.

[0025] Figure 9 A schematic diagram of the oblique cross-section structure of a voltage transformer with heat dissipation function as described in this invention.

[0026] In the diagram: 1. Main base; 2. Column; 3. Mounting platform; 4. Mutual inductance box; 5. Heat dissipation box; 6. Box cover; 7. Iron core body; 8. Guide rail; 9. First motor; 10. Lead screw; 11. Iron core seat; 12. Gear reducer; 13. Coil sleeve; 14. Coil column; 15. Mounting beam; 16. Induction coil; 17. Insulating column; 18. Terminal; 19. Liquid delivery pump; 20. Liquid delivery pipe; 21. Return pipe; 22. Filter baffle; 23. Refrigeration unit; 24. Cold pipe; 25. Heat pipe; 26. Heat dissipation fins. Detailed Implementation

[0027] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Detailed description follows.

[0028] Please see Figures 1-9This invention provides a technical solution: a voltage transformer with heat dissipation function, including a main base 1, a column 2 fixedly mounted on the main base 1, a mounting platform 3 fixedly mounted on the column 2, the mounting platform 3 fixedly mounted above the main base 1, a transformer box 4 fixedly mounted on the upper wall of the mounting platform 3, a heat dissipation box 5 fixedly mounted between the upper wall of the main base 1 and the lower wall of the mounting platform 3, a core opening and closing structure installed inside the transformer box 4, an adjustable coil structure installed inside the transformer box 4, a box cover 6 fixedly mounted above the transformer box 4, a cable connection structure provided on the box cover 6, and an active cooling structure and an oil circulation structure provided inside the heat dissipation box 5; through modular design. This layout not only makes the structure clearer and more compact, but more importantly, it effectively isolates the heat-generating components from the cooling components, avoiding mutual interference of heat conduction, thereby greatly improving heat dissipation efficiency. The core opening and closing structure and adjustable coil structure design inside the transformer box 4 facilitate equipment installation and maintenance and provide flexibility in application scenarios. The number of modules of the primary winding and secondary winding can be adjusted as needed, thereby quickly adjusting the voltage regulation ratio. The active cooling structure and oil circulation structure integrated in the heat dissipation box 5 constitute a highly efficient forced cooling system, ensuring that the voltage transformer can still operate stably and reliably under high load or harsh ambient temperature, significantly improving the service life and safety of the equipment.

[0029] This embodiment further specifies that the core opening and closing structure includes a pair of core bodies 7, which are vertically symmetrical C-shaped structures. Corresponding insertion slots are provided on the core bodies 7. A guide rail 8 is fixedly installed inside the mutual inductance box 4, and the pair of core bodies 7 are slidably mounted on the guide rail 8. A core driving unit is provided inside the mutual inductance box 4. This core opening and closing structure is designed to solve the problem of extremely inconvenient operation when installing and replacing coils with traditional fixed cores. By using a pair of separable C-shaped core bodies 7, the core bodies 7 can be opened when needed, exposing the internal space, thereby enabling quick and convenient installation, inspection, or replacement of the adjustable coil structure, greatly shortening maintenance downtime and reducing operation and maintenance costs. The corresponding insertion slots ensure that the two C-shaped core bodies 7 are precisely aligned when closed, minimizing the air gap in the magnetic circuit and ensuring low magnetic resistance and high measurement accuracy. The guide rail 8 provides a stable and smooth guide for the opening and closing movement of the iron core 7, preventing jamming or deflection during the movement; the setting of the iron core drive unit realizes the automation or semi-automation of the opening and closing action of the iron core 7, making the operation more labor-saving, precise and safe.

[0030] In this embodiment, the core drive unit includes a first motor 9, a lead screw 10, and a core seat 11. The core seat 11 is slidably installed inside the current inductance box 4 and fixedly installed on the lower wall of the core body 7. The lead screw 10 is rotatably installed inside the current inductance box 4. A threaded hole is provided on the core seat 11, and the lead screw 10 is threadedly connected to the core seat 11. The lead screw 10 is a bidirectional threaded rod, and the threaded holes on a pair of core seats 11 below the core body 7 have opposite directions of rotation. A gear reducer 12 is fixedly installed on the side wall of the current inductance box 4, and the first motor 9 is fixedly installed on the side wall of the current inductance box 4. In this configuration, the drive end of the first motor 9 is fixedly connected to the input end of the gear reducer 12, and the output end of the gear reducer 12 is fixedly connected to one end of the lead screw 10. When the first motor 9 drives the lead screw 10 to rotate through the gear reducer 12, since the threaded holes on the two iron core seats 11 rotate in opposite directions, the single-direction rotation of the lead screw 10 will simultaneously drive the two iron core seats 11 to move towards or away from each other, thereby achieving the synchronous closing or opening of the iron core 7. Complex bidirectional synchronous motion is completed using only one power source, avoiding the synchronization control difficulties and increased costs that may arise from a dual-motor solution. The use of the gear reducer 12 provides sufficient torque for moving the heavy iron core 7 and makes the opening and closing process smoother and more controllable.

[0031] This embodiment is further configured such that the adjustable coil structure includes a coil sleeve 13, a coil column 14 is fixedly installed inside the transformer box 4, and a mounting beam 15 is fixedly installed on the coil column 14. The coil sleeve 13 is fixedly installed on the mounting beam 15. The coil sleeve 13 has a rectangular structure and an induction coil 16 is provided on the coil sleeve 13. The coil sleeve 13 can be connected in series with adjacent coil sleeves 13. The ends of the coil sleeve 13 are connected to two sets of cable connection structures respectively. By making the induction coil 16 on an independent coil sleeve 13, the coil is modularized. Users can flexibly adjust the transformation ratio of the voltage transformer by connecting different numbers of coil sleeves 13 in series according to the actual voltage level requirements, which greatly enhances the versatility and adaptability of the product and reduces the trouble of needing to stock multiple specifications of transformers due to different voltage levels. When a coil unit fails, only the corresponding coil sleeve 13 needs to be replaced, without replacing the entire coil group, making maintenance convenient, quick, and inexpensive. The rectangular structure of the coil sleeve 13 matches the C-shaped structure of the iron core 7, which can more effectively utilize the internal space of the iron core 7 and improve the magnetic circuit coupling efficiency.

[0032] This embodiment further specifies that the cable connection structure includes an insulating post 17 and a terminal block 18. The insulating post 17 and the terminal block 18 are fixedly installed on the upper wall of the box cover 6. The terminal block 18 is electrically connected to the adjustable coil structure. The main function of the insulating post 17 is to provide sufficient electrical insulation distance and creepage distance to ensure safe isolation between the high-voltage part and the grounded box, prevent flashover, breakdown and other accidents, and ensure the safety of equipment and personnel. The terminal block 18 is used to firmly and reliably connect the external high-voltage cable, ensure good electrical contact, reduce contact resistance, and avoid local overheating caused by poor connection. Setting this structure on the upper wall of the box cover 6 facilitates on-site installation and wiring operations, and also facilitates daily inspection and monitoring.

[0033] This embodiment further specifies that the oil circulation structure includes a delivery pump 19, which is fixedly installed inside the heat sink 5. A delivery pipe 20 is fixedly installed at the output end of the delivery pump 19, and the output end of the delivery pipe 20 is connected to the lower wall of the transformer box 4. A return pipe 21 is fixedly installed on the side wall of the transformer box 4, and the output end of the return pipe 21 is connected to the lower end of the side wall of the heat sink 5. A filter baffle 22 is fixedly installed inside the heat sink 5. The delivery pump 19 serves as a power source, forcibly pumping the cooled insulating oil from the heat sink 5 into the upper transformer box 4, allowing the oil to flow fully and at high speed over the heated iron core 7 and the coil surface, thereby efficiently absorbing and removing heat. The heated oil returns to the heat sink 5 through the return pipe 21 for cooling, forming a complete cycle. The filter baffle 22 effectively filters out impurities such as metal shavings and insulating material fragments that may be generated in the oil during the circulation process, maintaining the cleanliness and excellent insulation performance of the insulating oil, which is crucial for extending the life of the transformer.

[0034] This embodiment is further configured such that the active cooling structure includes a refrigerant, the cooling unit 23 is a compressor cooler, the cold end of the cooling unit 23 is provided with a cold pipe 24, and the hot end of the cooling unit 23 is provided with a heat pipe 25. The cooling unit 23 is fixedly installed on the upper wall of the main base 1, the cold pipe 24 is located inside the heat dissipation box 5, and the heat pipe 25 is fixedly installed on the outer wall of the heat dissipation box 5. By introducing the compressor cooler, heat is actively transferred from the cold pipe 24 inside the heat dissipation box 5 to the heat pipe 25 outside the heat dissipation box 5. The cold pipe 24 is directly immersed in or in contact with the insulating oil, absorbing the heat of the oil with extremely high efficiency. Its cooling capacity is not affected by the ambient temperature. Even in hot environments or when the current transformer is fully loaded or overloaded, the oil temperature can be forcibly cooled and precisely controlled within a safe set range, thereby fundamentally solving the problem of performance degradation, shortened lifespan, or even burnout caused by overheating of traditional current transformers.

[0035] In this embodiment, a heat dissipation fin 26 is fixedly installed on the side wall of the heat dissipation box 5, and the heat dissipation fin 26 is connected to the heat pipe 25. Its core function is to significantly increase the contact area between the heat pipe 25 and the outside air, so that the large amount of heat transferred from the refrigerator 23 can be dissipated more quickly and fully.

[0036] Its detailed connection methods are well-known technologies in this field; such as Figure 1-9 As shown, the operator starts the first motor 9; the first motor 9 increases the torque through the gear reducer 12, driving the bidirectional threaded screw 10 to rotate; since the threaded holes on the two iron core seats 11 rotate in opposite directions, the unidirectional rotation of the screw 10 will drive the two C-shaped iron core bodies 7 to move synchronously and smoothly in opposite directions along the guide rail 8, thereby opening the iron core body 7 and exposing the coil column 14 inside. Based on the voltage level and required transformation ratio of the on-site power grid, the technicians selected the appropriate number of coil sleeve 13 modules; these independent coil sleeves 13 were installed sequentially on the mounting beam 15 and connected in series; the first and last ends of the series-connected coil group were electrically connected to the two sets of cable connection structures on the box cover 6 respectively. The first motor 9 is started in reverse, and the bidirectional threaded screw 10 moves the two C-shaped iron cores 7 synchronously towards each other until they are completely closed. The corresponding toothed grooves on the iron cores 7 ensure precise alignment after closure, minimize the air gap in the magnetic circuit, and ensure the accuracy of the measurement. The external high-voltage cable and the secondary measurement / protection circuit are connected to the transformer through the terminal 18 on the box cover 6. Insulating oil is injected into the transformer box 4 and the heat dissipation box 5. After the equipment is put into operation, it begins to perform its core voltage conversion function, accompanied by the generation of heat; external high voltage enters the primary winding of the adjustable coil structure through the cable connection structure; the high voltage current generates alternating magnetic flux in the closed iron core 7; the alternating magnetic flux passes through the secondary winding of the auxiliary winding, and induces a proportional low voltage according to the turns ratio, and the low voltage signal is sent to the measuring instrument or relay protection device. During the above process, the current flowing through the coil will generate copper losses, and the magnetic flux alternating in the iron core 7 will generate iron losses; this heat will be continuously transferred to the surrounding insulating oil, causing the oil temperature in the current transformer box 4 to rise continuously; in order to ensure that the equipment is not damaged or its accuracy is reduced due to overheating, an efficient active cooling system will start to work; the system includes an oil circulation and a refrigerant circulation. The insulating oil, heated and reduced in density inside the transformer box 4, flows into the heat sink 5 below through the return pipe 21 on the side wall. The liquid delivery pump 19 installed in the heat sink 5 is started, forcibly pumping the cooled low-temperature insulating oil at the bottom of the heat sink 5 back to the transformer box 4 above through the liquid delivery pipe 20. This cold oil flows at high speed over the iron core 7 and the coil surface, efficiently absorbing heat, and then reheats and flows back to the heat sink 5. During the circulation process, the oil flows through the filter baffle 22, effectively filtering out impurities and maintaining the cleanliness and insulation performance of the oil. This forms a forced and continuous internal oil circulation, constantly transferring heat from the transformer box 4 to the heat sink 5. The refrigeration unit 23, mounted on the main base 1, begins to operate. Its cold-end evaporator, i.e., the cold pipe 24, is located inside the heat dissipation box 5 and is in direct contact with the insulating oil. The surface temperature of the cold pipe 24 is extremely low, efficiently absorbing heat transferred from the oil. The refrigerant, after absorbing heat, is vaporized and compressed by the compressor into a high-temperature, high-pressure gas, which flows to the hot end / condenser of the heat pipe 25 located on the outer wall of the heat dissipation box 5. The heat pipe 25 is connected to a large number of heat dissipation fins 26, greatly increasing the contact area with the outside air. The heat of the high-temperature refrigerant is efficiently dissipated to the surrounding environment through the heat pipe 25 and the fins. After heat dissipation, the refrigerant condenses into a liquid and returns to the starting point of the refrigeration cycle. When the equipment needs to be repaired or parts replaced, follow these steps to replace or adjust the coil module. Simply open the core body 7 and you can directly replace the faulty coil sleeve 13, or increase or decrease the number of coil sleeves 13 to adjust the transformation ratio. After the operation is completed, close the core body 7 again. The whole process does not require disassembling the entire equipment, which greatly shortens downtime and reduces maintenance costs.

[0037] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A voltage transformer with heat dissipation function, comprising a main base (1), characterized in that, A column (2) is fixedly installed on the main base (1), and an installation platform (3) is fixedly installed on the column (2). The installation platform (3) is fixedly installed above the main base (1). A mutual inductance box (4) is fixedly installed on the upper wall of the installation platform (3). A heat dissipation box (5) is fixedly installed between the upper wall of the main base (1) and the lower wall of the installation platform (3). An iron core opening and closing structure is installed inside the mutual inductance box (4). An adjustable coil structure is installed inside the mutual inductance box (4). A box cover (6) is fixedly installed above the mutual inductance box (4). A cable connection structure is provided on the box cover (6). An active cooling structure and an oil circulation structure are provided inside the heat dissipation box (5).

2. A voltage transformer with heat dissipation function according to claim 1, characterized in that, The core opening and closing structure includes a pair of core bodies (7), the pair of core bodies (7) are vertically symmetrical C-shaped structures, the pair of core bodies (7) are provided with corresponding tooth grooves, the mutual inductance box (4) is fixedly installed with a guide rail (8), the pair of core bodies (7) are slidably installed on the guide rail (8), and the mutual inductance box (4) is provided with a core driving part.

3. A voltage transformer with heat dissipation function according to claim 2, characterized in that, The core drive unit includes a first motor (9), a lead screw (10), and a core seat (11). The core seat (11) is slidably installed in the mutual inductance box (4). The core seat (11) is fixedly installed on the lower wall of the core body (7). The lead screw (10) is rotatably installed in the mutual inductance box (4). The core seat (11) has a threaded hole. The lead screw (10) is threadedly connected to the core seat (11). The lead screw (10) is a bidirectional threaded rod. The threaded holes on the core seats (11) below the core body (7) have opposite rotation directions. A gear reducer (12) is fixedly installed on the side wall of the mutual inductance box (4). The first motor (9) is fixedly installed on the side wall of the mutual inductance box (4). The drive end of the first motor (9) is fixedly connected to the input end of the gear reducer (12). The output end of the gear reducer (12) is fixedly connected to one end of the lead screw (10).

4. A voltage transformer with heat dissipation function according to claim 3, characterized in that, The adjustable coil structure includes a coil sleeve (13), a coil column (14) is fixedly installed inside the mutual inductance box (4), an installation beam (15) is fixedly installed on the coil column (14), the coil sleeve (13) is fixedly installed on the installation beam (15), the coil sleeve (13) is a rectangular structure, and an induction coil (16) is provided on the coil sleeve (13).

5. A voltage transformer with heat dissipation function according to claim 4, characterized in that, The coil sleeve (13) can be installed in series with the adjacent coil sleeve (13), and the first and last ends of the coil sleeve (13) are respectively connected to the two sets of cable connection structures.

6. A voltage transformer with heat dissipation function according to claim 5, characterized in that, The cable connection structure includes an insulating post (17) and a terminal (18). The insulating post (17) and the terminal (18) are fixedly installed on the upper wall of the box cover (6). The terminal (18) is electrically connected to the adjustable coil structure.

7. A voltage transformer with heat dissipation function according to claim 6, characterized in that, The oil circulation structure includes a delivery pump (19), which is fixedly installed inside the heat sink (5). A delivery pipe (20) is fixedly installed at the output end of the delivery pump (19). The output end of the delivery pipe (20) is connected to the lower wall of the mutual inductance box (4). A return pipe (21) is fixedly installed on the side wall of the mutual inductance box (4). The output end of the return pipe (21) is connected to the lower end of the side wall of the heat sink (5). A filter baffle (22) is fixedly installed inside the heat sink (5).

8. A voltage transformer with heat dissipation function according to claim 7, characterized in that, The active cooling structure includes a refrigerator (23), which is a compressor refrigerator. The cold end of the refrigerator (23) is provided with a cold pipe (24), and the hot end of the refrigerator (23) is provided with a heat pipe (25). The refrigerator (23) is fixedly installed on the upper wall of the main base (1). The cold pipe (24) is located inside the heat dissipation box (5), and the heat pipe (25) is fixedly installed on the outer wall of the heat dissipation box (5).

9. A voltage transformer with heat dissipation function according to claim 8, characterized in that, The heat sink (5) has heat dissipation fins (26) fixedly installed on its side wall, and the heat dissipation fins (26) are connected to the heat pipe (25).

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