A fixing device for transformer tapping lead

Abstract

The utility model provides a kind of transformer tap lead fixing device, comprising: winding body;Supporting assembly, supporting assembly is connected with winding body;Limiting assembly, limiting assembly is movably arranged on supporting assembly, limiting assembly is used to limit tap lead on winding body, by setting supporting assembly and movable limiting assembly, the effective constraint and accurate positioning of tap lead are realized;The scheme solves the problem that lead is easy to swing and collide in traditional fixing mode, by flexibly adjusting the position of limiting assembly on supporting assembly, it can adapt to the wiring path of different leads, ensure the stability of lead during transformer transportation and operation, prevent the occurrence of insulation layer damage and short-circuit accident.

Description

Technical Field

[0001] This utility model relates to the field of transformer manufacturing technology, specifically to a transformer tap lead fixing device. Background Technology

[0002] In power transformers with voltage levels of 220kV and above, tap leads are key conductive components connecting the high-voltage winding tap changer and the off-load tap changer (or on-load tap changer), playing a crucial role in regulating the transformer's output voltage. Due to the high operating voltage, large current, and compact structure of 220kV transformers, their tap leads are not only long and numerous, but also require complex spatial wiring within the limited tank space. Currently, the fixing of 220kV transformer tap leads is mostly achieved through methods such as insulated screw binding, epoxy fiberglass cloth plate slot limiting, nylon cable ties, or simple insulated bracket support. However, during transformer transportation and hoisting, the shaking of the transformer can cause the insufficiently restrained leads to swing, resulting in collisions between leads or between leads and the tank or core, causing insulation damage and even leading to phase-to-phase short circuits or discharge to ground.

[0003] Therefore, existing technologies need further development. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and provide a transformer tap lead fixing device to solve the technical problem in the related technology that the shaking of the transformer will cause the insufficiently constrained leads to swing, resulting in collisions between leads or between leads and the tank or iron core, causing damage to the insulation layer, or even causing phase-to-phase short circuits or discharges to ground.

[0005] To achieve the above technical objectives, the present invention adopts the following technical solution: a transformer tap lead fixing device is provided, comprising: a winding body; a support component connected to the winding body; and a limiting component movably disposed on the support component, the limiting component being used to limit the tap lead on the winding body.

[0006] Further, the support assembly includes: an upper clamp, which is spaced apart along a preset direction and is disposed on the top of the winding body, and is used to clamp the top of the winding body; a lower clamp, which is disposed on the bottom of the winding body and is used to clamp the bottom of the winding body; at least two sets of support members, the two ends of each set of support members being connected to the upper clamp and the lower clamp respectively, and each set of support members being spaced apart along the extension direction of the upper clamp; the limiting assembly includes: at least two sets of limiting members, at least one set of limiting members being disposed on each set of support members, and each set of limiting members being movably disposed on the corresponding set of support members.

[0007] Further, the support member includes: a first support plate extending along the width direction of the upper clamping member and disposed on one side of the upper clamping member; a second support plate extending along the width direction of the upper clamping member and disposed on the lower clamping member, and located on the same side as the first support plate; and a first connecting plate connected to the first support plate and the second support plate respectively.

[0008] Furthermore, the limiting component includes: a first limiting plate, which is movably disposed on the first connecting plate; a first limiting slider, which has a groove on the first connecting plate extending along the extension direction of the first support plate and penetrating the first connecting plate, and the first limiting slider is movably disposed within the groove; a first connecting rod, which passes through the first limiting plate and connects to the first limiting slider; a second limiting slider, which is movably disposed within the groove, and the second limiting slider and the first limiting slider are spaced apart in the vertical direction; and a second connecting rod, which passes through the first limiting plate and connects to the second limiting slider.

[0009] Furthermore, the limiting component also includes: a first hand-held part, which is disposed at the end of the first connecting rod away from the first limiting slider; a first compression spring, which is sleeved on the first connecting rod and connected to the first hand-held part and the first limiting plate respectively; a second hand-held part, which is disposed at the end of the second connecting rod away from the second limiting slider; and a second compression spring, which is sleeved on the second connecting rod and connected to the second hand-held part and the first limiting plate respectively.

[0010] Furthermore, the limiting component also includes: a first rotating block, which is rotatably disposed with the end of the first limiting slider away from the first connecting rod; and a second rotating block, which is rotatably disposed with the end of the second limiting slider away from the second connecting rod.

[0011] Furthermore, the width of the first rotating block is the same as the width of the slide; the length of the first rotating block is greater than the width of the slide; the width of the second rotating block is the same as the width of the slide; the length of the second rotating block is greater than the width of the slide. Furthermore, it also includes: a stabilizing member, which is disposed between two sets of adjacent support members. The stabilizing member includes: a second connecting plate extending along the extension direction of the upper clamping member; the second connecting plate being slidably connected to two adjacent first connecting plates respectively; a groove being provided on the first connecting plate, extending along the extension direction of the first support plate and penetrating the first connecting plate; two first fasteners, which are respectively disposed at both ends of the second connecting plate and located in the grooves on the two adjacent first connecting plates; and two first fastening nuts, each first fastener and each first fastening nut being provided in a one-to-one correspondence, with each first fastening nut threadedly mating with the corresponding first fastener. The system comprises: a second connecting plate, which is fixed to two adjacent first connecting plates; a third connecting plate, which extends along the extension direction of the upper clamp; the third connecting plate being slidably connected to two adjacent first connecting plates; two second fasteners, which pass through both ends of the third connecting plate and are located in the grooves on the two adjacent first connecting plates, with each second fastener spaced vertically from each first fastener; and two second fastening nuts, which are correspondingly provided to each second fastener, with each second fastening nut threadedly engaging with the corresponding second fastener to fix the third connecting plate to the two adjacent first connecting plates.

[0012] Furthermore, the stabilizing component also includes: two third compression springs, each of which is respectively sleeved on each of the first fasteners, with the two ends of the two third compression springs abutting against the second connecting plate and the first fastener respectively; and two fourth compression springs, each of which is respectively sleeved on each of the second fasteners, with the two ends of the two fourth compression springs abutting against the third connecting plate and the second fastener respectively.

[0013] Furthermore, it also includes a first clamping plate and a second clamping plate, which are located on both sides of the third connecting plate, and the two ends of the second clamping plate are connected to the second connecting plate and the third connecting plate, respectively; the first clamping plate is movably disposed relative to the second connecting plate and the third connecting plate; two fastening bolts are provided at both ends of the first clamping plate, and the two fastening bolts pass through the first clamping plate and are threadedly engaged with the second connecting plate and the third connecting plate, respectively.

[0014] Beneficial effects: 1. By setting up support components and movable limiting components, effective constraint and precise positioning of tap leads are achieved. This solution solves the problem of easy swinging and collision of leads in traditional fixing methods. By flexibly adjusting the position of the limiting components on the support components, it can adapt to different lead wiring paths, ensuring the stability of leads during transformer transportation and operation, and preventing insulation layer damage and short circuit accidents.

[0015] 2. By setting up a frame structure with upper and lower clamps and multiple sets of support components, and setting movable limiting components on each set of support components, a three-dimensional lead wire fixing system is constructed. This scheme realizes all-round support and limiting of the tap lead wire. The multi-point distributed limiting components effectively disperse the force on the lead wire, prevent the resonance phenomenon of the lead wire under vibration conditions, and improve the reliability of the entire lead wire fixing system.

[0016] 3. By setting up a first support plate, a second support plate, and a first connecting plate to form a stable support frame, a reliable installation foundation is provided for the limiting components. This scheme enhances the overall rigidity and deformation resistance of the support components, ensures the stability of the support structure during transformer transportation and operation, and provides durable and effective fixed support for the tap lead. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the transformer tap lead fixing device used in this embodiment of the utility model; Figure 2 This is a partial structural schematic diagram of the transformer tap lead fixing device used in this embodiment of the utility model; Figure 3 This is a schematic diagram of the specific structure of the limiting component of the transformer tap lead fixing device used in this embodiment of the utility model.

[0018] The above figures include the following reference numerals: 1. Winding body; 2. Support assembly; 3. Limiting assembly; 4. First support plate; 5. Second support plate; 6. First connecting plate; 7. First limiting plate; 8. Slide groove; 9. First limiting slider; 10. First connecting rod; 11. Second limiting slider; 12. Second connecting rod; 13. First handheld part; 14. First compression spring; 15. Second handheld part; 16. Second compression spring; 17. First rotating block; 18. Second rotating block; 19. Stabilizer; 20. Second connecting plate; 21. First fastener; 22. First fastening nut; 23. Third connecting plate; 24. Second fastener; 25. Second fastening nut; 26. Third compression spring; 27. Fourth compression spring; 28. First clamping plate; 29. ​​Second clamping plate; 30. Fastening bolt. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0020] According to an embodiment of this utility model, a transformer tap changer fixing device is provided. Please refer to [link / reference]. Figures 1 to 3 It includes: a winding body 1; a support component 2, which is connected to the winding body 1; and a limiting component 3, which is movably disposed on the support component 2 and is used to limit the tap leads on the winding body 1.

[0021] By adopting the above technical solution, and by setting the support component 2 and the movable limiting component 3, effective constraint and precise positioning of the tap lead are achieved. This solution solves the problem of easy swinging and collision of the lead in the traditional fixing method. By flexibly adjusting the position of the limiting component 3 on the support component 2, it can adapt to different lead wiring paths, ensure the stability of the lead during transformer transportation and operation, and prevent insulation layer damage and short circuit accidents.

[0022] Please refer to Figure 1 The support component 2 includes: an upper clamp, which is spaced apart along a preset direction and is located on the top of the winding body 1, and is used to clamp the top of the winding body 1; a lower clamp, which is located on the bottom of the winding body 1 and is used to clamp the bottom of the winding body 1; at least two sets of support members, the two ends of each set of support members being connected to the upper clamp and the lower clamp respectively, and each set of support members being spaced apart along the extension direction of the upper clamp; the limiting component 3 includes: at least two sets of limiting members, at least one set of limiting members being provided on each set of support members, and each set of limiting members being movably provided on the corresponding set of support members.

[0023] By adopting the above technical solution, a three-dimensional lead wire fixing system is constructed by setting up a frame structure with upper and lower clamps and multiple sets of support components, and setting movable limiting components on each set of support components. This solution achieves all-round support and limiting of the tap lead wire, effectively disperses the force on the lead wire through the multi-point distributed limiting components, prevents the resonance phenomenon of the lead wire under vibration conditions, and improves the reliability of the entire lead wire fixing system.

[0024] Please refer to Figure 2 The support includes: a first support plate 4, which extends along the width direction of the upper clamping member and is disposed on one side of the upper clamping member; a second support plate 5, which extends along the width direction of the upper clamping member and is disposed on the lower clamping member and on the same side as the first support plate 4; and a first connecting plate 6, which is connected to the first support plate 4 and the second support plate 5 respectively.

[0025] By adopting the above technical solution, a stable support frame is formed by setting the first support plate 4, the second support plate 5 and the first connecting plate 6, providing a reliable installation foundation for the limiting component 3; this solution enhances the overall rigidity and deformation resistance of the support components, ensures the stability of the support structure during transformer transportation and operation, and provides durable and effective fixed support for the tap lead.

[0026] Specifically, the cross-sectional shape of the first support plate 4 and the second support plate 5 is L-shaped. By setting the cross-sectional shape of the first support plate 4 and the second support plate 5 to L-shaped, the structural characteristics of the L-shaped cross-section are utilized. This scheme significantly improves the bending strength and stability of the support plate, enabling it to withstand greater loads, while providing a larger connection area for the first connecting plate 6 and enhancing the structural integrity of the entire support component.

[0027] Please refer to Figure 3 The limiting components include: a first limiting plate 7, which is movably disposed on a first connecting plate 6; a first limiting slider 9, on which a groove 8 is provided, extending along the extension direction of the first support plate 4 and penetrating the first connecting plate 6, the first limiting slider 9 being movably disposed within the groove 8; a first connecting rod 10, which passes through the first limiting plate 7 and connects to the first limiting slider 9; a second limiting slider 11, which is movably disposed within the groove 8, and the second limiting slider 11 and the first limiting slider 9 are spaced apart in the vertical direction; and a second connecting rod 12, which passes through the first limiting plate 7 and connects to the second limiting slider 11.

[0028] By adopting the above technical solution, and by setting the first limiting plate 7, the first limiting slider 9, the second limiting slider 11 and the corresponding connecting rod, the precise positioning and reliable fixing of the limiting component on the support component are achieved; this solution enables the limiting component to be flexibly adjusted according to the actual position of the tap lead, and the double slider structure ensures the stability of the limiting component after adjustment, effectively preventing the displacement and swing of the lead.

[0029] Please refer to Figure 3 The limiting component further includes: a first hand-held part 13, which is disposed at the end of the first connecting rod 10 away from the first limiting slider 9; a first compression spring 14, which is sleeved on the first connecting rod 10 and connected to the first hand-held part 13 and the first limiting plate 7 respectively; a second hand-held part 15, which is disposed at the end of the second connecting rod 12 away from the second limiting slider 11; and a second compression spring 16, which is sleeved on the second connecting rod 12 and connected to the second hand-held part 15 and the first limiting plate 7 respectively.

[0030] By adopting the above technical solution, and by setting the first hand-held part 13, the second hand-held part 15 and the corresponding compression spring, a convenient operation method and self-locking function are provided for adjusting the limiting part. This solution allows the operator to easily adjust the position of the limiting part, while the preload of the spring ensures that the limiting part is firmly fixed in the set position, preventing loosening caused by vibration.

[0031] Please refer to Figure 3 The limiting component also includes: a first rotating block 17, which is rotatably disposed with the end of the first limiting slider 9 away from the first connecting rod 10; and a second rotating block 18, which is rotatably disposed with the end of the second limiting slider 11 away from the second connecting rod 12.

[0032] By adopting the above technical solution and setting a rotatable first rotating block 17 and a second rotating block 18, the contact method between the limiting member and the supporting member is increased. This solution enables the limiting member to adapt to the surface condition of the supporting member when it is fixed, improves the reliability of the fixation by increasing the contact area, and reduces wear between components.

[0033] Please refer to Figure 3 The width of the first rotating block 17 is the same as the width of the slide 8; the length of the first rotating block 17 is greater than the width of the slide 8; the width of the second rotating block 18 is the same as the width of the slide 8; the length of the second rotating block 18 is greater than the width of the slide 8. By adopting the above technical solution and precisely designing the dimensional relationship between the first rotating block 17 and the second rotating block 18, an effective locking function can be achieved within the slide groove 8. This solution utilizes the special dimensional design of the rotating block, which can lock the edge of the slide groove 8 after the rotating block rotates at a specific angle, forming a mechanical self-locking mechanism, which greatly enhances the holding force of the limiting component in the set position.

[0034] Please refer to Figure 2It also includes: a stabilizing member 19, which is disposed between two sets of adjacent support members. The stabilizing member 19 includes: a second connecting plate 20, which extends along the extension direction of the upper clamping member; the second connecting plate 20 is slidably connected to two adjacent first connecting plates 6; a sliding groove 8 is provided on the first connecting plate 6, which extends along the extension direction of the first support plate 4 and passes through the first connecting plate 6; two first fasteners 21, which pass through both ends of the second connecting plate 20 and are located in the sliding groove 8 on the two adjacent first connecting plates 6; and two first fastening nuts 22, each first fastener 21 and each first fastening nut 22 being provided in a one-to-one correspondence, and each first fastening nut 22 being threadedly engaged with the corresponding first fastener 21. The third connecting plate 20 is fixed to two adjacent first connecting plates 6; the third connecting plate 23 extends along the extension direction of the upper clamp; the third connecting plate 23 is slidably connected to two adjacent first connecting plates 6 respectively; two second fasteners 24 pass through both ends of the third connecting plate 23 and are located in the grooves 8 on the two adjacent first connecting plates 6, and each second fastener 24 is spaced apart from each first fastener 21 in the vertical direction; two second fastening nuts 25 are provided one-to-one with each second fastener 24, and each second fastening nut 25 is threadedly engaged with the corresponding second fastener 24 to fix the third connecting plate 23 to the two adjacent first connecting plates 6.

[0035] By adopting the above technical solution and connecting adjacent support members with stabilizing member 19, a more stable support network is formed. This solution significantly enhances the structural rigidity and integrity of the entire fixing device. Through the synergistic effect of the second connecting plate 20 and the third connecting plate 23, the relative displacement between the various support members is effectively prevented, ensuring the stability of the entire fixing system under strong vibration conditions.

[0036] Please refer to Figure 2 The stabilizing component 19 also includes: two third compression springs 26, each of which is respectively sleeved on each of the first fasteners 21, and the two ends of the two third compression springs 26 abut against the second connecting plate 20 and the first fastener 21 respectively; and two fourth compression springs 27, each of which is respectively sleeved on each of the second fasteners 24, and the two ends of the two fourth compression springs 27 abut against the third connecting plate 23 and the second fastener 24 respectively.

[0037] By adopting the above technical solution, and by setting the third compression spring 26 and the fourth compression spring 27 in the stabilizing component 19, an elastic buffer is provided for the connection structure. This solution effectively absorbs the vibration energy generated during the operation and transportation of the transformer, reduces the impact of vibration on the fixing device, and at the same time maintains the tightness of the connection part through the continuous clamping force of the spring, preventing the nut from loosening.

[0038] Please refer to Figure 2 It also includes a first clamping plate 28 and a second clamping plate 29, which are located on both sides of the third connecting plate 23, and the two ends of the second clamping plate 29 are connected to the second connecting plate 20 and the third connecting plate 23, respectively. The first clamping plate 28 is movably arranged relative to the second connecting plate 20 and the third connecting plate 23. Two fastening bolts 30 are provided at both ends of the first clamping plate 28, and the two fastening bolts 30 pass through the first clamping plate 28 and are threadedly engaged with the second connecting plate 20 and the third connecting plate 23, respectively.

[0039] By adopting the above technical solution, an adjustable clamping mechanism is formed by setting the first clamping plate 28 and the second clamping plate 29 in conjunction with the fastening bolt 30. This solution can clamp and fix the tap lead more precisely. By adjusting the position of the first clamping plate 28, it can adapt to leads of different diameters, ensuring that the lead is effectively constrained during the clamping process without damaging the insulation layer due to excessive tightness.

[0040] Working principle: First, the entire device is securely installed on the winding body 1 using the upper and lower clamps of the support assembly 2, forming a basic support frame. The operator inserts the first limiting slider 9 and the second limiting slider 11 into the groove 8 on the first connecting plate 6 according to the actual wiring path of the tap lead. After the first limiting plate 7 reaches the predetermined position, the operator presses the first connecting rod 10 and the second connecting rod 12 using the first handheld part 13 and the second handheld part 15. Then, the first rotating block 17 and the second rotating block 18 pass through the groove 8, and then the first rotating block 17 and the second rotating block 18 rotate 90 degrees. Mechanical self-locking is achieved by utilizing the structural characteristic that their length is greater than the width of the groove. Simultaneously, the first compression spring 14 and the second... Compression spring 16 provides continuous clamping force to ensure reliable tap connection fixing; then, stabilizing member 19 is installed between adjacent support members, and second connecting plate 20 and third connecting plate 23 are fixed in corresponding slide groove 8 by first fastener 21, second fastener 24 and their matching nuts. Third compression spring 26 and fourth compression spring 27 provide elastic preload to the connection point to absorb vibration; finally, the position of first clamping plate 28 is adjusted according to the size of the lead bundle, and clamping space is formed by fastening bolt 30 and second clamping plate 29, realizing multi-level and all-round fixing of tap leads, thereby effectively suppressing lead swing during transformer transportation and operation, and preventing insulation wear and short circuit accidents.

[0041] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0042] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0043] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0044] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0045] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A transformer tap changer fixing device, characterized in that, include: Winding body (1); Support component (2), which is connected to the winding body (1); Limiting component (3), which is movably disposed on the support component (2), is used to limit the tap lead on the winding body (1).

2. The transformer tap changer fixing device according to claim 1, characterized in that, The support component (2) includes: Upper clamps are spaced apart along a preset direction and are located on the top of the winding body (1). The upper clamps are used to clamp the top of the winding body (1). The lower clamp is disposed at the bottom of the winding body (1) and is used to clamp the bottom of the winding body (1). At least two sets of support members, each set of support members having its two ends connected to the upper clamp and the lower clamp respectively, and each set of support members being spaced apart along the extension direction of the upper clamp; The limiting component (3) includes: at least two sets of limiting members, each set of the supporting members having at least one set of the limiting members, and each set of the limiting members being movably disposed on the corresponding set of the supporting members.

3. The transformer tap changer fixing device according to claim 2, characterized in that, The support member includes: A first support plate (4) extends along the width direction of the upper clamp and is disposed on one side of the upper clamp. The second support plate (5) extends along the width direction of the upper clamping member and is disposed on the lower clamping member and is located on the same side as the first support plate (4). The first connecting plate (6) is connected to the first support plate (4) and the second support plate (5) respectively.

4. The transformer tap changer fixing device according to claim 3, characterized in that, The limiting component includes: The first limiting plate (7) is movably disposed on the first connecting plate (6); The first limiting slider (9) has a groove (8) on the first connecting plate (6). The groove (8) extends along the extension direction of the first support plate (4) and passes through the first connecting plate (6). The first limiting slider (9) is movably disposed in the groove (8). The first connecting rod (10) passes through the first limiting plate (7) and is connected to the first limiting slider (9); The second limiting slider (11) is movably disposed in the slide groove (8), and the second limiting slider (11) and the first limiting slider (9) are spaced apart in the vertical direction; The second connecting rod (12) passes through the first limiting plate (7) and is connected to the second limiting slider (11).

5. The transformer tap changer fixing device according to claim 4, characterized in that, The limiting component also includes: The first hand-held part (13) is disposed at the end of the first connecting rod (10) away from the first limiting slider (9); The first compression spring (14) is sleeved on the first connecting rod (10) and is connected to the first hand-held part (13) and the first limiting plate (7) respectively. The second hand-held part (15) is disposed at the end of the second connecting rod (12) away from the second limiting slider (11); The second compression spring (16) is sleeved on the second connecting rod (12) and is connected to the second hand-held part (15) and the first limiting plate (7) respectively.

6. The transformer tap changer fixing device according to claim 5, characterized in that, The limiting component also includes: The first rotating block (17) and the first limiting slider (9) are rotatably disposed at the end away from the first connecting rod (10); The second rotating block (18) is rotatably disposed at one end of the second limiting slider (11) away from the second connecting rod (12).

7. The transformer tap changer fixing device according to claim 6, characterized in that, The width of the first rotating block (17) is the same as the width of the slide (8); the length of the first rotating block (17) is greater than the width of the slide (8); The width of the second rotating block (18) is the same as the width of the slide (8); the length of the second rotating block (18) is greater than the width of the slide (8).

8. The transformer tap changer fixing device according to claim 3, characterized in that, Also includes: A stabilizing member (19) is disposed between two sets of adjacent supporting members, the stabilizing member (19) comprising: The second connecting plate (20) extends along the extension direction of the upper clamp; The second connecting plate (20) is slidably connected to two adjacent first connecting plates (6); the first connecting plate (6) is provided with a sliding groove (8), which extends along the extension direction of the first support plate (4) and penetrates the first connecting plate (6). Two first fasteners (21) are respectively inserted through both ends of the second connecting plate (20) and located in the grooves (8) on two adjacent first connecting plates (6); Two first fastening nuts (22), each first fastener (21) and each first fastening nut (22) are provided in a one-to-one correspondence, and each first fastening nut (22) and the corresponding first fastener (21) are threadedly engaged to fix the second connecting plate (20) on two adjacent first connecting plates (6); The third connecting plate (23) extends along the extension direction of the upper clamp; the third connecting plate (23) is slidably connected to two adjacent first connecting plates (6); Two second fasteners (24) are respectively inserted through both ends of the third connecting plate (23) and located in the grooves (8) on two adjacent first connecting plates (6). Each second fastener (24) and each first fastener (21) are spaced apart in the vertical direction. Two second fastening nuts (25), each of the second fasteners (24) and each of the second fastening nuts (25) are provided in a one-to-one correspondence, and each of the second fastening nuts (25) and the corresponding second fasteners (24) are threaded together to fix the third connecting plate (23) on two adjacent first connecting plates (6).

9. The transformer tap changer fixing device according to claim 8, characterized in that, The stabilizer (19) also includes: Two third compression springs (26) are respectively sleeved on each of the first fasteners (21), and the two ends of the two third compression springs (26) abut against the second connecting plate (20) and the first fastener (21) respectively. Two fourth compression springs (27) are respectively sleeved on each of the second fasteners (24), and the two ends of the two fourth compression springs (27) abut against the third connecting plate (23) and the second fastener (24) respectively.

10. The transformer tap changer fixing device according to claim 9, characterized in that, It also includes a first clamping plate (28) and a second clamping plate (29), the first clamping plate (28) and the second clamping plate (29) are respectively located on both sides of the third connecting plate (23), and the two ends of the second clamping plate (29) are respectively connected to the second connecting plate (20) and the third connecting plate (23); the first clamping plate (28) is movably disposed relative to the second connecting plate (20) and the third connecting plate (23); two fastening bolts (30) are provided at both ends of the first clamping plate (28), and the two fastening bolts (30) pass through the first clamping plate (28) and are threadedly engaged with the second connecting plate (20) and the third connecting plate (23) respectively.

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