Self-adaptive magnetic field shielding structure of 110kV-220kV oil-immersed large-scale main transformer

Abstract

The invention provides a self-adaptive magnetic field shielding structure of a 110kV-220kV oil-immersed large-scale main transformer, and relates to the technical field of oil-immersed transformers, the self-adaptive magnetic field shielding structure comprises an oil-immersed transformer body, the left and right sides of the oil-immersed transformer body are fixedly provided with fixed bottom plates, and the upper parts of the two fixed bottom plates are rotatably provided with magnetic field shielding plates; a second shielding plate is movably installed above each first shielding plate, a third shielding plate is movably installed above each second shielding plate, and a shielding structure capable of being automatically opened is arranged outside the oil-immersed transformer body, so that self-shielding protection can be achieved when the oil-immersed transformer body needs to be protected; according to the oil-immersed transformer, the whole shielding protection capability is greatly improved, a certain distance exists between the opened shielding structure and the oil-immersed transformer body, a certain protection distance can be generated for the oil-immersed transformer body, and the safety of the oil-immersed transformer body during use is further improved.

Description

Technical Field

[0001] This invention belongs to the technical field of oil-immersed transformers, and more specifically, relates to an adaptive magnetic field shielding structure for a 110kV-220kV large oil-immersed main transformer. Background Technology

[0002] In power systems, oil-immersed transformers are critical equipment, and their safe and stable operation is of paramount importance. However, existing protection measures for oil-immersed transformers have many shortcomings and are insufficient to meet the ever-increasing electricity demand and complex and ever-changing operating environments.

[0003] Traditional oil-immersed transformers typically employ fixed shielding structures, lacking automatic opening and closing capabilities. In different operating scenarios, such as when shielding is unnecessary for normal operation to ensure adequate heat dissipation, but requires timely shielding protection when subjected to external interference (electromagnetic interference, foreign object intrusion, etc.), the fixed shielding structure cannot flexibly adapt. This results in either adding unnecessary heat dissipation burden during normal operation or failing to provide timely and effective protection when needed, significantly limiting the operating efficiency and safety of oil-immersed transformers.

[0004] Existing protective structures are mostly single-layer designs, with limited protective capabilities. When faced with strong external interference, such as high-intensity electromagnetic radiation or impacts from foreign objects in severe weather, single-layer protection is insufficient to provide adequate protection, easily leading to damage to the internal components of oil-immersed transformers, affecting their normal operation and service life.

[0005] Furthermore, the existing protective structure is complex and slow to operate during opening and closing. Both opening and closing require tedious manual procedures, consuming significant time and effort. In emergencies, such as sudden electromagnetic interference or the approach of foreign objects, the inability to quickly activate the protective mechanism could lead to irreparable damage to the oil-immersed transformer.

[0006] Furthermore, traditional protective structures fail to adequately consider the issue of protective distance in their design. The distance between the protective structure and the oil-immersed transformer body is unreasonable; too close, and it may affect the transformer's heat dissipation; too far, and it cannot effectively block external interference. It is difficult to find a balance between protective effectiveness and heat dissipation requirements, which is detrimental to the long-term stable operation of oil-immersed transformers.

[0007] In summary, existing oil-immersed transformer protection technologies have many problems in terms of shielding flexibility, protection capability, opening and closing speed, and protection distance, and cannot meet the requirements of modern power systems for efficient and safe operation of oil-immersed transformers. Summary of the Invention

[0008] To address the aforementioned technical problems, this invention provides an adaptive magnetic field shielding structure for 110kV-220kV oil-immersed large main transformers.

[0009] An adaptive magnetic field shielding structure for a 110kV-220kV oil-immersed large main transformer includes an oil-immersed transformer body. Fixed base plates are fixedly installed on both the left and right sides of the oil-immersed transformer body. A second shielding plate is movably installed on top of each of the two fixed base plates. A third shielding plate is movably installed above each of the second shielding plates. Upper shielding covers are fixedly installed on both the left and right sides of the top of the oil-immersed transformer body. A side drive assembly is fixedly installed on the side of each fixed base plate, and each side drive assembly is used to drive the first shielding plate to rotate. A fourth shielding plate is fixedly installed on the back of the oil-immersed transformer body. A third motor is arranged on the side of the fourth shielding plate and is fixedly connected to the oil-immersed transformer body. The output shaft of the third motor is fixedly connected to the fourth shielding plate.

[0010] Preferably, both of the fixed base plates have a T-shaped cross-section, and the bottom protrusion of each fixed base plate is fixedly connected to the bottom of the oil-immersed transformer body. Each of the second shielding plates is slidably installed inside the first shielding plate, and each of the third shielding plates is slidably installed inside the second shielding plate. Two second motors are fixedly installed inside each of the first and second shielding plates, and a threaded rod is fixedly installed at the end of the output shaft of each second motor.

[0011] Preferably, each of the second and third shielding plates is threadedly connected to the threaded rod at the end of the output shaft of the second motor below it. Each of the upper shielding covers has two lifting lug holes through the top, and the two lifting lug holes are located above the lifting lugs on the top of the oil-immersed transformer body. Each of the side drive components has a first motor fixedly installed on the side wall near the top, and each of the side drive components has a drive shaft rotatably installed on the side wall near the bottom.

[0012] Preferably, a gear is fixedly installed between the output shaft of each first motor and the end of the drive shaft in the same side drive assembly, and a drive track meshes between the two gears. Each drive shaft passes through the fixed base plate and is fixedly connected to the first shielding plate. A fifth shielding plate is installed inside the fourth shielding plate, and a sixth shielding plate is installed inside the fifth shielding plate. Two fourth motors are fixedly installed inside the fourth and fifth shielding plates. A threaded rod is fixedly installed at the end of the output shaft of each fourth motor, and the sixth and fifth shielding plates are threadedly connected to the threaded rod of the output shaft of the fourth motor below them.

[0013] Compared with the prior art, the present invention has the following beneficial effects: In this invention, the rotation of the drive shaft drives the first shielding plate to rotate, which in turn drives the second and third shielding plates to rotate outward. Simultaneously, four second motors inside the first and second shielding plates start, causing the second and third shielding plates to retract. The first shielding plate rotates outward by 90 degrees and then stops. Subsequently, the third motor starts, driving the fourth shielding plate to rotate. At the same time, the fifth and sixth shielding plates retract into the fourth shielding plate. At this point, the external shielding structure of the oil-immersed transformer body is fully opened. By setting an automatically opening shielding structure outside the oil-immersed transformer body, the transformer body can be freely shielded and protected when protection is needed, greatly improving the overall shielding and protection capability. Furthermore, there is a certain distance between the opened shielding structure and the oil-immersed transformer body, which provides a certain protective distance for the transformer body, further improving the safety of the oil-immersed transformer body during use.

[0014] In this invention, the first motor drives the gear at its end to rotate via its output shaft. The rotation of the gear drives the drive track to rotate, which in turn drives the drive shaft to rotate. The drive shaft rotates the first shielding plate toward the oil-immersed transformer body. Simultaneously, two second motors inside the first shielding plate start, causing the second shielding plate to move upward. At the same time, two second motors inside the second shielding plate start, causing the third shielding plate to move upward. When the first shielding plate rotates 90 degrees, the second and third shielding plates move upward and reset, with the top of the third shielding plate fitting against the bottom of the upper shielding cover. At this point, the oil-immersed transformer body is properly shielded. By incorporating retractable second and third shielding plates inside the first shielding plate, multi-layered protection is achieved. Furthermore, when protection is not required, the shielding plate can be opened more quickly, increasing the overall operating speed.

[0015] In this invention, the third motor drives the fourth shielding plate to rotate toward the oil-immersed transformer body. At the same time, the two fourth motors inside the fourth shielding plate rotate, which in turn drives the fifth shielding plate to move upward. The two fourth motors inside the fifth shielding plate rotate, which in turn drives the sixth shielding plate to move upward. At this time, the fourth, fifth, and sixth shielding plates operate synchronously, thereby quickly protecting the back of the oil-immersed transformer body. Furthermore, the first shielding plates on both sides of the oil-immersed transformer body are in close contact with the sides of the fourth shielding plate, thus forming a more complete protective capability and further improving the overall protective capability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the body structure of the oil-immersed transformer of the present invention; Figure 2 This is a schematic diagram of the first shielding plate structure of the present invention; Figure 3 This is a schematic diagram of the second shielding plate structure of the present invention; Figure 4 This is a schematic diagram of the third shielding plate structure of the present invention; Figure 5 This is a schematic diagram of the shielding cover structure of the present invention; Figure 6 This is a schematic diagram of the sixth shielding plate structure of the present invention; Figure 7 This is a schematic diagram of the side-drive component structure of the present invention.

[0017] In the figure, the correspondence between the component names and the attached drawing numbers is as follows: 1. Oil-immersed transformer body; 12. Oil tank; 13. Upper shielding cover; 14. Lifting lug hole; 15. Side drive assembly; 16. First motor; 17. Drive track; 19. Drive shaft; 2. First shielding plate; 22. Second motor; 23. Second shielding plate; 24. Third shielding plate; 25. Fourth shielding plate; 26. Third motor; 28. Fourth motor; 29. ​​Fifth shielding plate; 3. Sixth shielding plate; 31. Fixed base plate. Detailed Implementation

[0018] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0019] Please see Figures 1-7This invention provides an adaptive magnetic field shielding structure for a 110kV-220kV oil-immersed large main transformer, comprising an oil-immersed transformer body 1. Fixed base plates 31 are fixedly installed on both the left and right sides of the oil-immersed transformer body 1. A 21 is rotatably installed above each of the two fixed base plates 31. A second shielding plate 23 is movably installed above each 21. A third shielding plate 24 is movably installed above each second shielding plate 23. Upper shielding covers 13 are fixedly installed on both the left and right sides of the top of the oil-immersed transformer body 1. A drive shaft 19 rotates, causing a first shielding plate 2 to rotate. The rotation of the first shielding plate 2 causes the second shielding plate 23 and the third shielding plate 24 to rotate outwards. Simultaneously, four second motors 22 inside the first and second shielding plates 23 start. The operation of the second motors 22 causes the second shielding plate 23 and the third shielding plate 24 to retract. The first shielding plate 2 stops after rotating outwards by ninety degrees, and then the third motors 24 are activated. The third motor 26 drives the fourth shielding plate 25 to rotate, while the fifth shielding plate 29 and the sixth shielding plate 3 retract into the fourth shielding plate 25. At this time, the outer shielding structure of the oil-immersed transformer body 1 is opened. By setting an automatically opening shielding structure on the outside of the oil-immersed transformer body 1, it can automatically shield and protect itself when the oil-immersed transformer body 1 needs protection, which greatly improves the overall shielding and protection capability. Moreover, there is a certain distance between the opened shielding structure and the oil-immersed transformer body 1. Each fixed base plate 31 has a side drive assembly 15 fixedly installed on its side. Each side drive assembly 15 is used to drive the first shielding plate 2 to rotate. The fourth shielding plate 25 is fixedly installed on the back of the oil-immersed transformer body 1. The third motor 26 is set on the side of the fourth shielding plate 25 and is fixedly connected to the oil-immersed transformer body 1. The output shaft of the third motor 26 is fixedly connected to the fourth shielding plate 25.

[0020] Both fixed base plates 31 have a T-shaped cross-section, and the protruding part at the bottom of each fixed base plate 31 is fixedly connected to the bottom of the oil-immersed transformer body 1. Each second shielding plate 23 is slidably installed inside the first shielding plate 2, and each third shielding plate 24 is slidably installed inside the second shielding plate 23. Two second motors 22 are fixedly installed inside each first shielding plate 2 and each second shielding plate 23. A threaded rod is fixedly installed at the end of the output shaft of each second motor 22. The first motor 16 drives the gear at the end to rotate through the output shaft. The rotation of the gear drives the drive track 17 to rotate. The rotation of the drive track 17 drives the drive shaft 19 to rotate through the gear. The rotation of the drive shaft 19 drives the first shielding plate 2 to rotate towards the oil-immersed transformer body 1. At the same time, the two second motors 22 inside the first shielding plate 2 start. The start of the two second motors 22 drives the second shielding plate 23 to move upward. The two second motors 22 inside the first shield 2 are started, which drives the third shield 24 to move upward. When the first shield 2 rotates 90 degrees, the second shield 23 and the third shield 24 move upward and reset. The top of the third shield 24 is attached to the bottom of the upper shield cover 13. At this time, the protection and shielding of the oil-immersed transformer body 1 is completed. By setting the retractable second shield 23 and the third shield 24 inside the first shield 2, each second shield 23 and the third shield 24 is threadedly connected to the threaded rod at the end of the output shaft of the second motor 22 below it. Each upper shield cover 13 has two lifting lug holes 14 through it at the top. The two lifting lug holes 14 are located above the lifting lugs at the top of the oil-immersed transformer body 1. Each side drive assembly 15 has a first motor 16 fixedly installed on the side wall near the top. Each side drive assembly 15 has a drive shaft 19 rotatably installed on the side wall near the bottom.

[0021] Within the same side drive assembly 15, each first motor 16 has a gear fixedly installed between its output shaft and the end of its drive shaft 19, and a drive track 17 meshes between the two gears. Each drive shaft 19 passes through the fixed base plate 31 and is fixedly connected to the first shielding plate 2. A fifth shielding plate 29 is installed inside the fourth shielding plate 25, and a sixth shielding plate 3 is installed inside the fifth shielding plate 29. Two fourth motors 28 are fixedly installed inside both the fourth shielding plate 25 and the fifth shielding plate 29. Simultaneously, two fourth motors 28 inside the fourth shielding plate 25... When motor 28 rotates, the two fourth motors 28 rotate, causing the fifth shielding plate 29 to move upward. The two fourth motors 28 inside the fifth shielding plate 29 rotate, causing the sixth shielding plate 3 to move upward. At this time, the fourth shielding plate 25, the fifth shielding plate 29, and the sixth shielding plate 3 operate synchronously, thereby quickly protecting the back of the oil-immersed transformer body 1. Each fourth motor 28 has a threaded rod fixedly installed at the end of its output shaft, and the sixth shielding plate 3 and the fifth shielding plate 29 are threadedly connected to the threaded rod of the output shaft of the fourth motor 28 below them.

[0022] Working principle: First, an oil tank 12 is fixedly installed on the top of the oil-immersed transformer body 1. When the oil-immersed transformer body 1 does not require shielding, the first motor 16 inside the side drive assembly 15 is started. The first motor 16 drives the drive shaft 19 to rotate via the drive track 17. The rotation of the drive shaft 19 drives the first shielding plate 2 to rotate. The rotation of the first shielding plate 2 drives the second shielding plate 23 and the third shielding plate 24 to rotate outward. At the same time, the four second motors 22 inside the first shielding plate 2 and the second shielding plate 23 are started. The operation of the second motors 22 drives the second shielding plate 23 and the third shielding plate 24 to retract. The first shielding plate 2 rotates outward by ninety degrees and then stops. Then the... The third motor 26 is activated, which drives the fourth shielding plate 25 to rotate. At the same time, the fifth shielding plate 29 and the sixth shielding plate 3 retract into the fourth shielding plate 25. At this time, the external shielding structure of the oil-immersed transformer body 1 is opened. By setting an automatically opening shielding structure on the outside of the oil-immersed transformer body 1, it can automatically shield and protect the oil-immersed transformer body 1 when protection is needed, which greatly improves the overall shielding and protection capability. Moreover, there is a certain distance between the opened shielding structure and the oil-immersed transformer body 1, which can provide a certain protective distance for the oil-immersed transformer body 1, further improving the safety of the oil-immersed transformer body 1 during use.

[0023] The second step involves starting the first motor 16 when the oil-immersed transformer body 1 requires shielding protection. The first motor 16 drives the gear at its end to rotate via its output shaft. The rotation of the gear drives the drive track 17 to rotate, which in turn drives the drive shaft 19 to rotate via the gear. The rotation of the drive shaft 19 causes the first shielding plate 2 to rotate toward the oil-immersed transformer body 1. Simultaneously, the two second motors 22 inside the first shielding plate 2 start, causing the second shielding plate 23 to move upward. At the same time, the two second motors 22 inside the second shielding plate 23 start, causing the third shielding plate 24 to move upward. When the first shielding plate 2 rotates 90 degrees, the second shielding plate 23 and the third shielding plate 24 move upward and reset. The top of the third shielding plate 24 is then in contact with the bottom of the upper shielding cover 13. At this point, the shielding of the oil-immersed transformer body 1 is complete. By providing retractable second shielding plates 23 and 24 inside the first shielding plate 2, multiple layers of protection can be achieved. Furthermore, when protection is not required, the shielding can be opened more quickly, improving the overall operating speed.

[0024] The third motor 26 drives the fourth shielding plate 25 to rotate toward the oil-immersed transformer body 1. At the same time, the two fourth motors 28 inside the fourth shielding plate 25 rotate, which drives the fifth shielding plate 29 to move upward. The two fourth motors 28 inside the fifth shielding plate 29 rotate, which drives the sixth shielding plate 3 to move upward. At this time, the fourth shielding plate 25, the fifth shielding plate 29 and the sixth shielding plate 3 operate synchronously, so as to quickly protect the back of the oil-immersed transformer body 1. Moreover, the first shielding plates 2 on both sides of the oil-immersed transformer body 1 are in close contact with the sides of the fourth shielding plate 25, thus forming a more complete protective capability and further improving the overall protective capability.

[0025] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. An adaptive magnetic field shielding structure of a 110 kV-220 kV oil-immersed large main transformer, comprising an oil-immersed transformer body (1), characterized in that: The left and right sides of the oil-immersed transformer body (1) are fixedly installed with fixed bottom plates (31), the upper sides of the two fixed bottom plates (31) are rotatably installed with (21), the upper sides of each (21) are movably installed with second shielding plates (23), the upper sides of each second shielding plate (23) are movably installed with third shielding plates (24), the left and right sides of the top of the oil-immersed transformer body (1) are fixedly installed with upper shielding covers (13), the side edges of each fixed bottom plate (31) are fixedly installed with side drive assemblies (15), each side drive assembly (15) is used for driving the rotation of the first shielding plate (2), the back of the oil-immersed transformer body (1) is fixedly installed with a fourth shielding plate (25), the side edge of the fourth shielding plate (25) is provided with a third motor (26), and the third motor (26) is fixedly connected with the oil-immersed transformer body (1), and the output shaft of the third motor (26) is fixedly connected with the fourth shielding plate (25).

2. The adaptive magnetic field shielding structure of a 110 kV-220 kV oil-immersed large main transformer according to claim 1, characterized in that, The cross-sectional shape of the two fixed bottom plates (31) is T-shaped, and the bottom protruding part of each fixed bottom plate (31) is fixedly connected with the bottom of the oil-immersed transformer body (1).

3. The adaptive magnetic field shielding structure of a 110 kV-220 kV oil-immersed large main transformer according to claim 1, characterized in that, Each second shielding plate (23) is slidably installed in the first shielding plate (2), and each third shielding plate (24) is slidably installed in the second shielding plate (23).

4. The adaptive magnetic field shielding structure of a 110 kV-220 kV oil-immersed large main transformer according to claim 1, characterized in that, The inside of each first shielding plate (2) and second shielding plate (23) is fixedly installed with two second motors (22), and the end of the output shaft of each second motor (22) is fixedly installed with a threaded rod.

5. The adaptive magnetic field shielding structure of a 110 kV-220 kV oil-immersed large main transformer according to claim 1, characterized in that, Each second shielding plate (23) and third shielding plate (24) is threadedly connected with the threaded rod at the end of the output shaft of the second motor (22) below.

6. The adaptive magnetic field shielding structure of a 110 kV-220 kV oil-immersed large main transformer according to claim 1, characterized in that, The top of each upper shielding cover (13) is provided with two lifting lug holes (14) penetratingly formed, and the two lifting lug holes (14) are located above the lifting lug at the top of the oil-immersed transformer body (1).

7. The adaptive magnetic field shielding structure of a 110 kV-220 kV oil-immersed large main transformer according to claim 1, characterized in that, The side wall near the top of each side drive assembly (15) is fixedly installed with a first motor (16), and the side wall near the bottom of each side drive assembly (15) is rotatably installed with a drive shaft (19).

8. The adaptive magnetic field shielding structure of the 110 kV-220 kV oil-immersed large main transformer according to claim 7, characterized in that, The output shaft of each first motor (16) in the same side drive assembly (15) is fixedly installed with a gear between the end of the drive shaft (19), and the two gears are meshed with a drive track (17).

9. The adaptive magnetic field shielding structure of a 110 kV-220 kV oil-immersed large main transformer according to claim 8, characterized in that, Each drive shaft (19) penetrates the fixed bottom plate (31), and the drive shaft (19) is fixedly connected with the first shielding plate (2).

10. The adaptive magnetic field shielding structure of a 110 kV-220 kV oil-immersed large main transformer according to claim 1, characterized in that, The inside of the upper side of the fourth shielding plate (25) is installed with a fifth shielding plate (29), the inside of the upper side of the fifth shielding plate (29) is installed with a sixth shielding plate (3), the inside of the fourth shielding plate (25) and the fifth shielding plate (29) is fixedly installed with two fourth motors (28), the end of the output shaft of each fourth motor (28) is fixedly installed with a threaded rod, and the sixth shielding plate (3) and the fifth shielding plate (29) are threadedly connected with the threaded rod of the output shaft of the fourth motor (28) below.

Images