Main transformer structure suitable for large oil-immersed power transformer

Abstract

The invention provides a main transformer structure suitable for a large oil-immersed power transformer, and relates to the technical field of oil-immersed transformers, the main transformer structure comprises an oil-immersed transformer, the left and right sides of the oil-immersed transformer are both provided with side protection plates, and the left and right sides of the bottom of the oil-immersed transformer are both fixedly provided with fixed bottom plates; two driving motors are fixedly installed above each fixed bottom plate, a driving lead screw is fixedly installed at the end of an output shaft of each driving motor, two first protection frames are arranged at the top of the oil-immersed transformer, and the two driving motors drive side protection plates on the two sides to move downwards through the driving lead screws; the variable structures are arranged on the two sides of the oil-immersed transformer, so that the two sides of the oil-immersed transformer can be opened and closed according to the implementation requirements of the oil-immersed transformer, the functions of the oil-immersed transformer in multiple scenes are improved, and the overall variability of the oil-immersed transformer is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of oil-immersed transformers, and more specifically, particularly relates to a main transformer structure suitable for large oil-immersed power transformers. Background Art

[0002] In the power transmission and distribution system, oil-immersed transformers play a crucial role, and their stable and efficient operation is essential for ensuring power supply. However, there are a series of problems to be solved urgently in the current protection structure and function of oil-immersed transformers.

[0003] The traditional protection structure of oil-immersed transformers is usually relatively fixed and lacks the ability to flexibly adjust according to the actual operating scenarios. Whether facing different seasons, different environmental conditions, or during special situations such as maintenance and repair of the transformer, it is difficult to make adaptive changes. For example, during normal operation, good ventilation and heat dissipation conditions may be required, but the existing protection structure may limit air circulation; in bad weather (such as heavy rain, sand and dust, etc.), effective protection cannot be provided in a timely manner. This fixed protection mode cannot meet the functional requirements of oil-immersed transformers in various scenarios, reducing their overall practicality and reliability.

[0004] In terms of the top protection of oil-immersed transformers, the traditional design lacks flexibility. The top protection structure often cannot make corresponding adjustments according to the changes in the protection status on both sides of the transformer and cannot effectively adapt to different usage scenarios and protection requirements. For example, when it is necessary to open both sides of the transformer to meet specific operating requirements (such as heat dissipation, maintenance, etc.), the top protection structure cannot change accordingly, resulting in the integrity and coordination of the protection being affected. Moreover, the traditional top protection structure has poor rain drainage ability when dealing with natural factors such as rain, which may cause rainwater to accumulate and cause potential damage to the transformer.

[0005] In addition, the existing protection structure of oil-immersed transformers has limitations in height adjustment. When it is necessary to adjust the height of the protection structure to adapt to different operating requirements (such as increasing ventilation space, expanding the protection range, etc.), it is difficult to achieve sufficient height change. At the same time, during the lifting process of the protection structure, there is a lack of effective shock absorption measures, resulting in a large impact on the fixed bottom plate of the transformer when the protection plate is lifted and lowered. This will not only cause the structure to shake, affecting the stability of the protection structure, but also may damage the precision components inside the transformer and shorten the service life of the transformer.

[0006] In summary, the existing protection technology of oil-immersed transformers has many defects in terms of structural flexibility, top protection adaptability, height adjustment ability, and shock absorption effect, and cannot meet the requirements of modern power systems for the efficient and reliable operation of oil-immersed transformers. Summary of the Invention

[0007] To solve the above technical problems, the present invention provides a main transformer structure applicable to large oil-immersed power transformers to solve the above problems.

[0008] A main transformer structure applicable to large oil-immersed power transformers includes an oil-immersed transformer. Side protection plates are arranged on both the left and right sides of the oil-immersed transformer. Fixed bottom plates are fixedly installed on both the left and right sides of the bottom of the oil-immersed transformer. Two driving motors are fixedly installed above each fixed bottom plate. A driving lead screw is fixedly installed at the end of the output shaft of each driving motor. Each driving lead screw passes through the outside of the side protection plate. Two first protection frames are arranged on the top of the oil-immersed transformer.

[0009] Preferably, a bottom fixing frame is fixedly installed above each fixed bottom plate located between the two driving motors. Rubber shock-absorbing columns are fixedly installed above each bottom fixing frame. Inner empty grooves are formed on the inner walls of each side protection plate. At least two hexagonal support columns are fixedly installed in a staggered manner inside each inner empty groove. When the side protection plate is in the initial state, the bottom of the side protection plate is in contact with the tops of the three rubber shock-absorbing columns.

[0010] Preferably, each driving lead screw passes through the outside of the first protection frame, and each driving lead screw is slidably connected to the first protection frame. A middle support frame is fixedly installed in the middle above the oil-immersed transformer. An upper telescopic plate is slidably installed above the middle support frame. A second protection frame is slidably installed inside each first protection frame.

[0011] Preferably, two first rotating shaft frames are fixedly installed at the end of each second protection frame. Two second rotating shaft frames are fixedly installed at the top of each upper telescopic plate. The two second rotating shaft frames and the first rotating shaft frames are rotatably connected by rotating shafts.

[0012] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, the two side protection plates move upward to push the ends of the two first protection frames upward. At the same time, the first protection frames move upward and rotate. When the side protection plates move upward until both sides of the oil-immersed transformer are fully opened, it stops. At this time, the oil-immersed transformer is in a fully open state. When the two sides of the oil-immersed transformer need to be closed, the driving motors on both sides are started. The two driving motors drive the side protection plates on both sides to move downward through the driving lead screws. At this time, the closing of the oil-immersed transformer is completed. By setting variable structures on both sides of the oil-immersed transformer, the two sides of the oil-immersed transformer can be opened and closed according to the implementation requirements of the oil-immersed transformer, improving the functions of the oil-immersed transformer in multiple scenarios and enhancing the overall variability of the oil-immersed transformer.

[0013] In the present invention, the first protective frame moves upward and drives the second protective frame to move upward, and at the same time, the first protective frame and the second protective frame will rotate, the first protective frame drives the second protective frame to rotate, the end of the second protective frame drives the first rotating shaft frame to rotate, the first rotating shaft frame rotates outside the second rotating shaft frame through the rotating shaft, and at the same time, the second protective frame will retract into the first protective frame, and when the upward height of the first protective frame exceeds the middle supporting frame, the first protective frame and the second protective frame will be stretched again. By designing the first protective frame and the second protective frame to be retractable and rotatable, the height of the rising side protective plate can be adapted, thereby greatly improving the variable capacity of the top of the oil-immersed transformer, and the first protective frame and the second protective frame are in an inclined state in the initial state, which can improve the rain-removing capacity on rainy days.

[0014] In the present invention, the first protective frame and the second protective frame will drive the upper telescopic plate to move upward, and the upper telescopic plate will move upward in the middle support frame. The upper telescopic plate is pulled by the first protective frame and the second protective frame, so that it can adapt to the rising height of the side protective plate, and prevent the side protective plate from being unable to continue to support the middle support frame due to its high height. The height of the two sides of the oil-immersed transformer when changing is increased, and the lifting height of the side protective plate is increased. After the side protective plate is reset downward, the bottom of the side protective plate will contact the three rubber shock-absorbing columns. The three rubber shock-absorbing columns have a good shock-absorbing effect, which avoids the side protective plate from having a large impact on the fixed bottom plate and reduces the shaking of the side protective plate during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the oil-immersed transformer of the present invention; Figure 2 It is a schematic diagram of the structure of the side protection plate of the present invention; Figure 3 It is a schematic diagram of the structure of the first protective frame of the present invention; Figure 4 It is a schematic diagram of the structure of the middle support frame of the present invention; Figure 5 It is a schematic diagram of the structure of the upper telescopic plate of the present invention; Figure 6 It is a schematic diagram of the structure of the side protection plate of the present invention; Figure 7 The present invention Figure 5 A is an enlarged structural diagram of FIG.

[0016] In the figure, the correspondence between the component names and the figure numbers is: 1. Oil-immersed transformer; 11. Oil tank; 12. Fixed bottom plate; 13. Bottom fixing frame; 14. Rubber shock-absorbing column; 15. Driving motor; 16. Driving screw; 17. First protective frame; 18. Second protective frame; 19. Middle support frame; 21. First rotating shaft frame; 22. Side protective plate; 23. Inner hollow groove; 24. Hexagonal support column; 3. Second rotating shaft frame; 31. Upper telescopic plate. Specific Embodiments

[0017] The following further describes in detail the embodiments of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0018] Please refer to Figures 1-7 , the present invention provides a main transformer structure applicable to a large oil-immersed power transformer, including an oil-immersed transformer 1. Side protection plates 22 are provided on both the left and right sides of the oil-immersed transformer 1. Fixed bottom plates 12 are fixedly installed on both the left and right sides of the bottom of the oil-immersed transformer 1. The two side protection plates 22 move upward to push the ends of the two first protection frames 17 upward. At the same time, the first protection frames 17 move upward and rotate. When the side protection plates 22 move upward until both sides of the oil-immersed transformer 1 are fully opened, it stops. At this time, the oil-immersed transformer 1 is in a fully open state. When both sides of the oil-immersed transformer 1 need to be closed, the driving motors 15 on both sides are started. The two driving motors 15 drive the side protection plates 22 on both sides to move downward through the driving lead screws 16. At this time, the closing of the oil-immersed transformer 1 is completed. By providing a variable structure on both sides of the oil-immersed transformer 1, the opening and closing of both sides can be carried out according to the implementation requirements of the oil-immersed transformer 1. Above each fixed bottom plate 12, two driving motors 15 are fixedly installed. At the end of the output shaft of each driving motor 15, a driving lead screw 16 is fixedly installed. Each driving lead screw 16 passes through the outside of the side protection plate 22. Two first protection frames 17 are provided on the top of the oil-immersed transformer 1.

[0019] Above each fixed bottom plate 12 located between the two driving motors 15, a bottom fixing frame 13 is fixedly installed. Above each bottom fixing frame 13, a rubber shock-absorbing column 14 is fixedly installed. An inner hollow groove 23 is provided on the inner wall of each side protection plate 22. The upward movement of the first protection frame 17 drives the second protection frame 18 to move upward. At the same time, the first protection frame 17 and the second protection frame 18 will rotate. The first protection frame 17 drives the second protection frame 18 to rotate. The end of the second protection frame 18 drives the first rotating shaft frame 21 to rotate. The first rotating shaft frame 21 rotates outside the second rotating shaft frame 3 through a rotating shaft. At the same time, the second protection frame 18 will retract into the first protection frame 17. When the upward height of the first protection frame 17 exceeds the middle support frame 19, the first protection frame 17 and the second protection frame 18 will stretch again. By designing the first protection frame 17 and the second protection frame 18 to be telescopic and rotatable, the height of the side protection plate 22 rising can be adapted, greatly improving the variable ability at the top of the oil-immersed transformer 1. At least two hexagonal support columns 24 are fixedly installed in a staggered manner inside each inner hollow groove 23. When the side protection plate 22 is in the initial state, the bottom of the side protection plate 22 is in contact with the tops of the three rubber shock-absorbing columns 14.

[0020] Each driving lead screw 16 passes through the outside of the first protective frame 17, and each driving lead screw 16 is slidably connected to the first protective frame 17. A middle support frame 19 is fixedly installed in the middle above the oil-immersed transformer 1. An upper telescopic plate 31 is slidably installed above the middle support frame 19. A second protective frame 18 is slidably installed inside each first protective frame 17. The first protective frame 17 and the second protective frame 18 drive the upper telescopic plate 31 to move upward. The upper telescopic plate 31 moves upward inside the middle support frame 19. The upper telescopic plate 31 is pulled by the first protective frame 17 and the second protective frame 18, so as to adapt to the rising height of the side protection plate 22, prevent the phenomenon that the middle support frame 19 cannot continue to support due to the high height of the side protection plate 22, and improve the height when the two sides of the oil-immersed transformer 1 change. Two first rotating shaft frames 21 are fixedly installed at the end of each second protective frame 18. Two second rotating shaft frames 3 are fixedly installed at the top of each upper telescopic plate 31. The two second rotating shaft frames 3 and the first rotating shaft frames 21 are rotatably connected through rotating shafts.

[0021] Working principle: In the first step, an oil tank 11 is fixedly installed on the top of the oil-immersed transformer 1. When the oil-immersed transformer 1 needs to dissipate heat, two driving motors 15 above the fixed bottom plate 12 are started. The two driving motors 15 rotate to drive the two driving lead screws 16 to rotate. The two driving lead screws 16 are matched with the side protection plates 22 through threads. The two driving lead screws 16 rotate to drive the two side protection plates 22 to move upward. The two side protection plates 22 move upward to push the ends of the two first protective frames 17 upward. At the same time, the first protective frame 17 moves upward and rotates. When the side protection plates 22 move upward until both sides of the oil-immersed transformer 1 are fully opened, stop. At this time, the oil-immersed transformer 1 is in a fully open state. When the two sides of the oil-immersed transformer 1 need to be closed, the driving motors 15 on both sides are started. The two driving motors 15 drive the side protection plates 22 on both sides to move downward through the driving lead screws 16. At this time, the oil-immersed transformer 1 is closed. By setting variable structures on both sides of the oil-immersed transformer 1, the two sides can be opened and closed according to the implementation requirements of the oil-immersed transformer 1, improving the functions of the oil-immersed transformer 1 in multiple scenarios and the overall variability of the oil-immersed transformer 1.

[0022] Step 2: When both sides of the oil-immersed transformer 1 need to be opened, start two driving motors 15. The two driving lead screws 16 drive two side protection plates 22 to move upward through threads, and at the same time drive the first protection frame 17 to move upward. The upward movement of the first protection frame 17 drives the second protection frame 18 to move upward. At the same time, the first protection frame 17 and the second protection frame 18 will rotate. The first protection frame 17 drives the second protection frame 18 to rotate, and the end of the second protection frame 18 drives the first rotating shaft frame 21 to rotate. The first rotating shaft frame 21 rotates outside the second rotating shaft frame 3 through a rotating shaft. At the same time, the second protection frame 18 will retract into the first protection frame 17. When the upward height of the first protection frame 17 exceeds the middle support frame 19, the first protection frame 17 and the second protection frame 18 will stretch again. By designing the first protection frame 17 and the second protection frame 18 to be telescopic and rotatable, the height of the side protection plate 22 rising can be adapted, greatly improving the variable ability at the top of the oil-immersed transformer 1. Moreover, the first protection frame 17 and the second protection frame 18 are in an inclined state in the initial state, which can improve the rain drainage ability in rainy days.

[0023] Step 3: When the first protection frame 17 and the second protection frame 18 move upward, the first protection frame 17 and the second protection frame 18 will drive the upper telescopic plate 31 to move upward. The upper telescopic plate 31 moves upward in the middle support frame 19. The upper telescopic plate 31 is pulled by the first protection frame 17 and the second protection frame 18, so as to adapt to the rising height of the side protection plate 22, prevent the phenomenon that the middle support frame 19 cannot continue to support due to the relatively high height of the side protection plate 22, improve the height when both sides of the oil-immersed transformer 1 change, and increase the lifting height of the side protection plate 22. After the side protection plate 22 returns downward, the bottom of the side protection plate 22 will contact three rubber shock-absorbing columns 14. The three rubber shock-absorbing columns 14 play a good shock-absorbing effect, avoid the large impact of the side protection plate 22 on the fixed bottom plate 12, reduce the shaking during the operation of the side protection plate 22. An inner empty groove 23 is opened inside the side protection plate 22, reducing the overall weight. At the same time, a plurality of hexagonal support columns 24 are fixed in the inner empty groove 23, which can also increase the overall compressive capacity.

[0024] Oil-immersed transformer 1: It is the core equipment of the main transformer structure, which is cooled and insulated by oil immersion, used to change the magnitude of alternating voltage, and realize the transmission and distribution of electric energy.

[0025] Oil tank 11: Located at the top of the oil-immersed transformer 1, it is used to store transformer oil, provide cooling and insulating media for the transformer, and at the same time protect internal components such as windings and iron cores.

[0026] Fixed bottom plate 12: Fixedly installed on the left and right sides at the bottom of the oil-immersed transformer 1, it is used to support the entire transformer, and fix the transformer on the foundation through bolts and other connecting parts to ensure its stability.

[0027] Bottom fixing frame 13: Located above the fixed bottom plate 12 and between the two driving motors 15, it is used to fix the rubber shock-absorbing column 14 and provide support and installation positions for the rubber shock-absorbing column 14.

[0028] Rubber shock-absorbing column 14: Installed above the bottom fixing frame 13, its function is to play a shock-absorbing and buffering role during the lifting and lowering process of the side protection plate 22, reduce the impact of the side protection plate 22 on the fixed bottom plate 12, and reduce the shaking during equipment operation.

[0029] Driving motor 15: Two are installed above each fixed bottom plate 12, and the output shaft drives the driving lead screw 16 to rotate, providing power for the lifting and lowering of the side protection plate 22.

[0030] Driving lead screw 16: One end is fixedly connected to the output shaft of the driving motor 15, and the other end penetrates the side protection plate 22 and the first protection frame 17. Through the threaded fit with the side protection plate 22, the rotational motion of the driving motor 15 is converted into the up-and-down linear motion of the side protection plate 22.

[0031] First protection frame 17: Located on both sides of the top of the oil-immersed transformer 1, connected to the side protection plate 22. When the side protection plate 22 is lifted and lowered, its end will be pushed upward and rotated, and at the same time drive the second protection frame 18 to move, playing a protection and support role.

[0032] Second protection frame 18: Slide-mounted inside the first protection frame 17, can move upward, rotate and telescopic with the first protection frame 17. Its end is rotationally connected to the second rotating shaft frame 3 through the first rotating shaft frame 21, further improving the variable ability and protection performance of the top of the oil-immersed transformer 1.

[0033] Middle support frame 19: Fixedly installed in the middle above the oil-immersed transformer 1, used to support the upper telescopic plate 31, and at the same time provide a reference benchmark for the movement of the first protection frame 17 and the second protection frame 18, ensuring their stability and accuracy during the movement process.

[0034] First rotating shaft frame 21: Fixedly installed at the end of the second protection frame 18, rotationally connected to the second rotating shaft frame 3 through a rotating shaft, realizing the movable connection between the second protection frame 18 and the upper telescopic plate 31, enabling them to move in coordination when the side protection plate 22 is lifted and lowered.

[0035] Side protection plate 22: It is arranged on the left and right sides of the oil-immersed transformer 1 and moves up and down driven by the driving screw rod 16, so as to open or close both sides of the oil-immersed transformer 1, playing a role in protection and heat dissipation adjustment. An inner hollow groove 23 is opened on its inner wall, which reduces its own weight. At the same time, the hexagonal support columns 24 in the inner hollow groove 23 increase the overall compressive resistance.

[0036] Inner hollow groove 23: It is opened on the inner wall of the side protection plate 22, making the side protection plate 22 form a hollow structure. While reducing the weight, the compressive strength of the side protection plate 22 is ensured by the hexagonal support columns 24 fixed in a staggered manner inside.

[0037] Hexagonal support columns 24: They are fixed in a staggered manner inside the inner hollow groove 23 and are used to enhance the compressive resistance of the side protection plate 22, ensuring that it can withstand a certain external force during the lifting process. At the same time, it also helps to disperse the pressure and improve the stability of the structure.

[0038] Second rotating shaft bracket 3: It is fixedly installed at the top of the upper telescopic plate 31 and is rotationally connected to the first rotating shaft bracket 21 through a rotating shaft, connecting the upper telescopic plate 31 with the first protection frame 17 and the second protection frame 18, enabling them to move in coordination and jointly adapt to the height change of the lifting of the side protection plate 22.

[0039] Upper telescopic plate 31: It is slidably installed above the middle support frame 19 and moves upward driven by the first protection frame 17 and the second protection frame 18, being able to adapt to the height of the rising side protection plate 22, preventing the situation that the middle support frame 19 cannot continue to support due to the high height of the side protection plate 22, and improving the height when both sides of the oil-immersed transformer 1 change.

[0040] The embodiments of the present invention are given for the purposes of illustration and description, and are not exhaustive or limit the present invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and enable those of ordinary skill in the art to understand the present invention and thus design various embodiments with various modifications suitable for specific purposes.

Claims

1. A main transformer structure applicable to large oil-immersed power transformers, comprising an oil-immersed transformer (1), characterized in that: On both the left and right sides of the oil-immersed transformer (1), side protection plates (22) are provided. On both the left and right sides of the bottom of the oil-immersed transformer (1), fixed bottom plates (12) are fixedly installed. Above each of the fixed bottom plates (12), two driving motors (15) are fixedly installed. At the end of the output shaft of each driving motor (15), a driving lead screw (16) is fixedly installed. Each driving lead screw (16) passes through the outside of the side protection plate (22). On the top of the oil-immersed transformer (1), two first protection frames (17) are provided.

2. The main transformer structure applicable to a large oil-immersed power transformer according to claim 1, characterized in that, Above each of the fixed bottom plates (12) located between the two driving motors (15), a bottom fixed frame (13) is fixedly installed. Above each of the bottom fixed frames (13), a rubber shock-absorbing column (14) is fixedly installed.

3. The main transformer structure applicable to large oil-immersed power transformers according to claim 1, characterized in that, An inner empty groove (23) is formed in the inner wall of each side protection plate (22). At least two hexagonal support columns (24) are fixedly installed in a staggered manner inside each inner empty groove (23).

4. The main transformer structure applicable to a large oil-immersed power transformer according to claim 2, characterized in that When the side protection plate (22) is in the initial state, the bottom of the side protection plate (22) is in contact with the tops of the three rubber shock-absorbing columns (14).

5. The main transformer structure applicable to a large oil-immersed power transformer as described in claim 1, wherein, Each driving lead screw (16) passes through the outside of the first protection frame (17), and each driving lead screw (16) is slidably connected to the first protection frame (17).

6. The main transformer structure applicable to a large oil-immersed power transformer as claimed in claim 1, wherein, In the middle above the oil-immersed transformer (1), a middle support frame (19) is fixedly installed. Above the middle support frame (19), an upper telescopic plate (31) is slidably installed.

7. The main transformer structure applicable to a large oil-immersed power transformer according to claim 6, characterized in that, Inside each of the first protection frames (17), a second protection frame (18) is slidably installed.

8. The main transformer structure applicable to a large oil-immersed power transformer according to claim 7, characterized in that, At the end of each second protection frame (18), two first rotating shaft frames (21) are fixedly installed.

9. The main transformer structure applicable to a large oil-immersed power transformer according to claim 8, characterized in that, At the top of each upper telescopic plate (31), two second rotating shaft frames (3) are fixedly installed.

10. The main transformer structure applicable to a large oil-immersed power transformer according to claim 9, characterized in that, The two second rotating shaft frames (3) and the first rotating shaft frames (21) are rotatably connected by a rotating shaft.

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