A transformer shell burst short circuit impact reinforcing structure

Abstract

This invention relates to a reinforced structure for transformer housing to resist sudden short-circuit impacts, belonging to the technical field of transformer housings. It includes a transformer housing with an end cover mounted on its upper end and a support frame mounted on its lower end. A buffer assembly is circumferentially arranged on the transformer housing to buffer short-circuit impacts. The buffer assembly includes brackets mounted on both sides of the support frame, with guide rods laterally connected to the brackets. Two buffer plates are slidably connected to the guide rods, and two extension plates are connected to opposite sides of each buffer plate. When the transformer housing encounters a sudden short circuit and deforms outward due to internal oil pressure, the outer wall of the housing pushes the side clamping plate, causing the buffer plate to slide along the guide rods to both sides, stretching the reset spring. The spring deformation absorbs the instantaneous impact energy of the short circuit. The buffer plate pulls the rectangular frame downwards via a transmission rod, and the inclined wall of the rectangular frame pushes the side pressure plate inwards to clamp the side wall of the housing.

Description

Technical Field

[0001] This invention relates to the field of transformer housing technology, specifically to a reinforced structure for transformer housing to resist sudden short-circuit impacts. Background Technology

[0002] Oil-immersed transformers are widely used in power distribution scenarios. The transformer shell is used to hold the internal windings and insulating oil. Currently, the industry generally adopts a processing method of assembling fixed reinforcement components on the outside of the shell and using pre-installed bolts to achieve hard compression sealing of the end cover flange. This static reinforcement and sealing structure is a conventional forming scheme in the field of transformer shell manufacturing.

[0003] When a transformer experiences a sudden short-circuit fault, the instantaneous impact load caused by the short circuit will cause a sharp increase in the oil pressure inside the tank. The huge electrodynamic force generated by the short-circuit current will be quickly conducted to the insulating oil, and the instantaneous hydraulic load will uniformly impact the side walls of the casing and the end cover area. The existing static reinforcement structure is fixed in position after it is formed. When it is impacted, the side walls of the casing bulge outward due to the internal oil pressure, which lacks dynamic buffering. The stress concentration problem at the corners of the tank cannot be relieved in real time. After the end cover is deformed by the oil pressure, the sealing tightness of the flanges changes unevenly. After repeated impacts, the deformation of the casing gradually accumulates and deforms. The flange gaskets are locally compressed and fail, resulting in the practical problem of loose seals and oil leakage. In the later stage, it is necessary for staff to conduct regular inspections and tighten the flange bolts, which increases the equipment operation and maintenance costs.

[0004] To address the aforementioned issues, innovative design based on existing methods is urgently needed. Summary of the Invention

[0005] The purpose of this invention is to provide a reinforced structure for transformer housing to resist sudden short-circuit impact, so as to solve the problems mentioned in the background. The technical solution of this invention addresses the problem that the existing technical solutions are too simplistic and provides a solution that is significantly different from the existing technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a transformer housing reinforced structure to resist sudden short-circuit impact, comprising a transformer housing, an end cover installed at the upper end of the transformer housing, a support frame installed at the lower end of the transformer housing, and a buffer assembly arranged circumferentially on the transformer housing for buffering short-circuit impact;

[0007] The buffer assembly includes brackets installed on both sides of the support frame. Guide rods are horizontally connected to the brackets. Two buffer plates are slidably connected to the guide rods. Two extension plates are connected to opposite sides of each buffer plate. A return spring is connected between the extension plates. A side pressure plate is slidably connected to one side of each buffer plate. A wedge is connected to the upper end of each side pressure plate. A side clamp is connected to the lower end of each side pressure plate near the wedge.

[0008] The upper end of the support frame is provided with a sealing reinforcement component for sealing and reinforcing the end cap.

[0009] Preferably, the buffer assembly further includes a transmission rod hinged to the upper end of the buffer plate, and a rectangular frame hinged to the other end of the transmission rod, the inner walls of the rectangular frame being inclined on both sides.

[0010] Preferably, a buffer gap is left between the side wall of the rectangular frame and the transformer housing, the inner walls on both sides of the rectangular frame correspond to the wedges, and the outer wall of the wedges fits against the inclined inner wall of the rectangular frame.

[0011] Preferably, the sealing reinforcement assembly includes two drive shafts mounted on the upper end of the rectangular frame, and each drive shaft is connected to a T-shaped bracket at its upper end.

[0012] Preferably, a first extrusion shaft is connected to both sides of the T-shaped frame, a second extrusion shaft is connected to the middle of the lower end of the T-shaped frame, and a round shaft is slidably connected to the end of the T-shaped frame.

[0013] Preferably, a first pressure plate is connected to the lower end of the circular shaft, a damping spring is connected between the first pressure plate and the T-shaped frame, and two second pressure plates are laterally slidably connected to the lower end of the first pressure plate.

[0014] Preferably, each of the second pressure plate sidewalls is connected to a transmission plate, and each transmission plate is provided with a transmission groove, and the first extrusion shaft is slidably connected to the corresponding transmission groove.

[0015] Preferably, two staggered expansion frames are rotatably connected to one side of the first pressure plate, the staggered part of the expansion frames corresponds to the second extrusion shaft, and the lower ends of the two expansion frames are connected to a top shaft.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. When the transformer shell of this invention encounters a sudden short circuit and is squeezed outward by internal oil pressure, the outer wall of the shell pushes the side clamping plate, which drives the buffer plate to slide along the guide rod to both sides and stretch the reset spring. Relying on the deformation of the spring, the instantaneous impact energy of the short circuit is absorbed. The buffer plate pulls the rectangular frame down through the transmission rod. The wedge block of the inclined wall of the rectangular frame drives the side pressure plate to hug the side wall of the shell inward. The greater the deformation, the greater the clamping force of the side wall increases synchronously, realizing the adaptive locking limit of the shell under pressure. The structure constrains the shell corners and side walls to bulge outward, which alleviates the plastic deformation of the shell caused by the short circuit impact and stabilizes the overall shape of the transformer shell.

[0018] 2. During the side wall locking operation, the rectangular frame drives the T-shaped frame to press down via the drive shaft. With the help of the damping spring, the first pressure plate flexibly presses the middle of the end cover. The second extrusion shaft expands the expansion frame so that the top shaft pushes the flange sealing gap. The first extrusion shaft pushes the second pressure plate to expand and press the outer edge of the end cover. The sealing surface of the end cover is reinforced from both the top and bottom. After the impact pressure is released, the return spring and the damping spring drive all components to automatically rebound and reset. It can automatically compact the sealing gap and suppress the warping and oil leakage of the end cover at the moment of each short circuit impact. There is no need for manual real-time adjustment of the sealing pressure, which simplifies the external locking accessories and continuously improves the sealing stability of the end cover flange. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a side view of the overall structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the first partial structure of the buffer component of the present invention;

[0022] Figure 4 This is a schematic diagram of the second partial structure of the buffer component of the present invention;

[0023] Figure 5 For the present invention Figure 1 A schematic diagram of the structure of region A;

[0024] Figure 6 Disassembly of the sealing reinforcement component structure of the present invention;

[0025] Figure 7 This is a schematic diagram of a first partial structure of the sealing reinforcement component of the present invention;

[0026] Figure 8 This is a schematic diagram of a second partial structure of the sealing reinforcement component of the present invention.

[0027] In the diagram: 1. Transformer housing; 2. End cover; 3. Support frame; 401. Bracket; 402. Guide rod; 403. Buffer plate; 404. Extension plate; 405. Return spring; 406. Side pressure plate; 407. Wedge block; 408. Side clamping plate; 409. Transmission rod; 410. Rectangular frame; 501. Transmission shaft; 502. T-shaped frame; 503. First extrusion shaft; 504. Second extrusion shaft; 505. Round shaft; 506. First pressure plate; 507. Damping spring; 508. Second pressure plate; 509. Transmission plate; 510. Transmission groove; 511. Expansion frame; 512. Top shaft. Detailed Implementation

[0028] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0029] Please see Figures 1-8 The present invention provides a technical solution: a transformer housing reinforced structure to resist sudden short circuit impact, including a transformer housing 1, an end cover 2 installed at the upper end of the transformer housing 1, and a support frame 3 installed at the lower end of the transformer housing 1;

[0030] Among them, the support frame 3 provides bottom load-bearing limit for the transformer housing 1, ensuring that the housing is installed stably.

[0031] In one embodiment of the present invention, a buffer assembly is provided circumferentially on the transformer housing 1 for buffering short-circuit impacts; the buffer assembly includes brackets 401 installed on both sides of the support frame 3, guide rods 402 are horizontally connected on the brackets 401, two buffer plates 403 are slidably connected to the guide rods 402, two extension plates 404 are connected to opposite sides of the buffer plates 403, a return spring 405 is connected between the extension plates 404, a side pressure plate 406 is slidably connected to one side of the buffer plates 403, a wedge block 407 is connected to the upper end of the side pressure plate 406, and a side clamping plate 408 is connected to the lower end of the side pressure plate 406 near the wedge block 407;

[0032] The buffer assembly also includes a transmission rod 409 hinged to the upper end of the buffer plate 403, and a rectangular frame 410 hinged to the other end of the transmission rod 409. The inner walls of the rectangular frame 410 on both sides are inclined. A buffer gap is left between the side wall of the rectangular frame 410 and the transformer housing 1. The inner walls of the rectangular frame 410 on both sides correspond to the wedge 407, and the outer wall of the wedge 407 fits against the inclined inner wall of the rectangular frame 410.

[0033] When a short-circuit fault occurs, the pressure of the insulating oil inside the tank surges, and the transformer shell 1 expands and deforms outward under the internal pressure. The outward expansion of the outer wall of the transformer shell 1 presses against the side clamping plate 408. The side clamping plate 408, under pressure, sequentially drives the side pressure plate 406 and the wedge block 407 to move outward, thereby pushing the buffer plate 403 to slide laterally to both sides along the guide rod 402. The laterally moving buffer plate 403 pulls the extension plate 404 to expand outward simultaneously. The extension plate 404 stretches the reset spring 405, and absorbs part of the impact energy by relying on the deformation of the spring. The extension plate 404 simultaneously drives the side pressure plate 406, the wedge block 407, and the side clamping plate 408 to extend laterally. The outwardly moving side clamping plate 408 presses against the corner area of ​​the transformer shell 1 in the opposite direction, enhancing the rigidity at the corner.

[0034] Furthermore, the contact and compression area between the side pressure plate 406 and the side wall of the housing 1 is increased simultaneously to initially limit the expansion and deformation of the housing corners; among them, the guide rod 402 restricts the horizontal movement direction of the buffer plate 403, and the tensile deformation of the return spring 405 absorbs the instantaneous impact, so that the expansion of the side wall pressure surface and the corner limiting are carried out simultaneously.

[0035] During the lateral displacement of the buffer plate 403, the transmission rod 409 hinged to its upper end swings and deflects. The swinging transmission rod 409 pulls the rectangular frame 410 downward along the reserved buffer gap. The downward-moving rectangular frame 410 uses its inner inclined wall to press down on the wedge block 407. The wedge block 407 is squeezed by the inclined surface and generates an inward component force. The wedge block 407 pushes the side pressure plate 406 to press the side wall of the transformer shell 1 inward, converting the impact deformation force of the shell's outward expansion into an inward locking mechanical strengthening force, effectively suppressing the bulging deformation of the shell side wall. The force conversion is completed by the cooperation of the inclined inner wall of the rectangular frame 410 and the inclined surface of the wedge block 407, and the shell's self-locking and reinforcement is achieved by relying on the power generated by the shell deformation.

[0036] As one embodiment of the present invention, a sealing reinforcement component is provided on the upper end of the support frame 3 for sealing and reinforcing the end cap 2; the sealing reinforcement component includes two drive shafts 501 installed on the upper end of the rectangular frame 410, and each drive shaft 501 is connected to a T-shaped frame 502 at its upper end.

[0037] Both sides of the T-shaped frame 502 are connected to the first extrusion shaft 503, and the middle of the lower end of the T-shaped frame 502 is connected to the second extrusion shaft 504. The end of the T-shaped frame 502 is slidably connected to the round shaft 505; the lower end of the round shaft 505 is connected to the first pressure plate 506, and a damping spring 507 is connected between the first pressure plate 506 and the T-shaped frame 502. The lower end of the first pressure plate 506 is laterally slidably connected to two second pressure plates 508.

[0038] The second pressure plate 508 is connected to a transmission plate 509 on its side wall. The transmission plate 509 is provided with a transmission groove 510. The first extrusion shaft 503 is slidably connected to the corresponding transmission groove 510. Two staggered expansion frames 511 are rotatably connected to one side of the first pressure plate 506. The staggered part of the expansion frames 511 corresponds to the second extrusion shaft 504. The lower end of the two expansion frames 511 is connected to a top shaft 512.

[0039] The downward-moving rectangular frame 410 drives the top drive shaft 501 to move downwards in sync. The downward-moving drive shaft 501 pulls the T-shaped frame 502 to move downwards as a whole. The descending T-shaped frame 502 compresses the damping spring 507, which pushes the round shaft 505 downwards. The round shaft 505 presses down on the first pressure plate 506. The first pressure plate 506 flexibly presses the middle position of the long side of the end cover 2. Relying on the buffering characteristics of the damping spring 507, the impact vibration is weakened, preventing the middle part of the end cover 2 from being lifted by oil pressure, and strengthening the sealing effect of the middle part of the end cover 2. Among them, the damping spring 507 plays a buffering and unloading role, avoiding the end cover 2 and sealing components from being squeezed and damaged by rigid pressure.

[0040] As the T-shaped frame 502 falls, the second extrusion shaft 504 mounted at the lower end of the T-shaped frame 502 moves down synchronously. The second extrusion shaft 504 extrudes the cross hinge position of the two sets of staggered expansion frames 511. The extruded expansion frame 511 rotates around the hinge point of itself and the first pressure plate 506 as the rotation center. The rotating expansion frame 511 drives the bottom top shaft 512 to rise upward along the arc trajectory. The upward-moving top shaft 512 presses against the flange connection gap between the transformer housing 1 and the end cover 2 from below, compacting the sealing surface and preventing oil leakage from the joint. At the same time, the first extrusion shafts 503 fixed on both sides of the T-shaped frame 502 move downward synchronously. The first extrusion shafts 503 are embedded in the transmission groove 510 of the transmission plate 509 and slide along the groove. The sliding generates a lateral thrust to push the transmission plate 509 to move outward. The outwardly moving transmission plate 509 drives the second pressure plate 508 to extend laterally to both sides from the lower end of the first pressure plate 506, widening the pressing range of the edge of the end cover 2 and reinforcing the outer edge seal of the end cover 2 in all directions.

[0041] After the impact ends, the transformer casing 1 loses its internal pressure support and retracts inward, removing the external pushing force on the side clamping plate 408. The previously stretched reset spring 405 retracts due to its own elasticity, pulling the two buffer plates 403 to retract inward along the guide rod 402. The buffer plates 403 drive the side pressure plate 406, wedge block 407, and side clamping plate 408 to retract inward through the extension plate 404. The inwardly retracting buffer plates 403 lift the transmission rod 409 in the opposite direction. The transmission rod 409 lifts the rectangular frame 410 vertically upward. The upward rectangular frame 410 releases the inclined pressure on the wedge block 407, and the clamping and locking force of the side wall disappears.

[0042] The upward-resetting rectangular frame 410 drives the transmission shaft 501 and T-shaped frame 502 to rise synchronously. After the T-shaped frame 502 moves upward, the damping spring 507 rebounds and extends, lifting the round shaft 505 and the first pressure plate 506 upward. The first pressure plate 506 is separated from the middle of the end cover 2. The second pressing shaft 504 moves upward synchronously, releasing the pressing force on the expansion frame 511. The expansion frame 511 rotates in the opposite direction, and the top shaft 512 falls downward, separating from the connecting flange of the transformer housing 1 and the end cover 2. The first pressing shaft 503 rises synchronously with the T-shaped frame 502, removing the lateral pressing force on the transmission groove 510. The transmission plate 509 drives the second pressure plate 508 to retract inward, and all components return to the initial standby state, ready to cope with sudden short-circuit impacts again.

[0043] Working principle:

[0044] When a short-circuit fault occurs, the pressure of the insulating oil inside the tank surges, and the transformer shell 1 expands and deforms outward under the internal pressure. The outward expansion of the outer wall of the transformer shell 1 presses against the side clamping plate 408. The side clamping plate 408, under pressure, sequentially drives the side pressure plate 406 and the wedge block 407 to move outward, thereby pushing the buffer plate 403 to slide laterally to both sides along the guide rod 402. The laterally moving buffer plate 403 pulls the extension plate 404 to expand outward simultaneously. The extension plate 404 stretches the reset spring 405, and absorbs part of the impact energy by relying on the deformation of the spring. The extension plate 404 simultaneously drives the side pressure plate 406, the wedge block 407, and the side clamping plate 408 to extend laterally. The outwardly moving side clamping plate 408 presses against the corner area of ​​the transformer shell 1 in the opposite direction, enhancing the rigidity at the corner.

[0045] In addition, the contact and compression area between the side pressure plate 406 and the side wall of the shell 1 is increased simultaneously to initially limit the expansion and deformation of the shell corners;

[0046] During the lateral displacement of the buffer plate 403, the transmission rod 409 hinged to its upper end swings and deflects. The swinging transmission rod 409 pulls the rectangular frame 410 downward along the reserved buffer gap. The downward moving rectangular frame 410 uses the inclined inner wall to press down the wedge block 407. The wedge block 407 is squeezed by the inclined surface and generates an inward component force. The wedge block 407 pushes the side pressure plate 406 to press the side wall of the transformer shell 1 inward, converting the impact deformation force of the shell's outward expansion into the mechanical reinforcing force of inward locking, effectively suppressing the bulging deformation of the shell side wall.

[0047] The downward-moving rectangular frame 410 drives the top drive shaft 501 to move downwards in sync. The downward-moving drive shaft 501 pulls the T-shaped frame 502 to move downwards as a whole. The descending T-shaped frame 502 compresses the damping spring 507. The damping spring 507 pushes the round shaft 505 downwards. The round shaft 505 presses down on the first pressure plate 506. The first pressure plate 506 flexibly presses the middle position of the long side of the end cover 2. Relying on the buffering characteristics of the damping spring 507, the impact vibration is weakened, and the middle part of the end cover 2 is prevented from tilting upwards due to oil pressure, thereby strengthening the sealing effect in the middle of the end cover 2.

[0048] As the T-shaped frame 502 falls, the second extrusion shaft 504 mounted at the lower end of the T-shaped frame 502 moves down synchronously. The second extrusion shaft 504 extrudes the cross hinge position of the two sets of staggered expansion frames 511. The extruded expansion frame 511 rotates around the hinge point of itself and the first pressure plate 506 as the rotation center. The rotating expansion frame 511 drives the bottom top shaft 512 to rise upward along the arc trajectory. The upward-moving top shaft 512 presses against the flange connection gap between the transformer housing 1 and the end cover 2 from below, compacting the sealing surface and preventing oil leakage from the joint. At the same time, the first extrusion shafts 503 fixed on both sides of the T-shaped frame 502 move downward synchronously. The first extrusion shafts 503 are embedded in the transmission groove 510 of the transmission plate 509 and slide along the groove. The sliding generates a lateral thrust to push the transmission plate 509 to move outward. The outwardly moving transmission plate 509 drives the second pressure plate 508 to extend laterally to both sides from the lower end of the first pressure plate 506, widening the pressing range of the edge of the end cover 2 and reinforcing the outer edge seal of the end cover 2 in all directions.

[0049] After the impact ends, the transformer casing 1 loses its internal pressure support and retracts inward, removing the external pushing force on the side clamping plate 408. The previously stretched reset spring 405 retracts due to its own elasticity, pulling the two buffer plates 403 to retract inward along the guide rod 402. The buffer plates 403 drive the side pressure plate 406, wedge block 407, and side clamping plate 408 to retract inward through the extension plate 404. The inwardly retracting buffer plates 403 lift the transmission rod 409 in the opposite direction. The transmission rod 409 lifts the rectangular frame 410 vertically upward. The upward rectangular frame 410 releases the inclined pressure on the wedge block 407, and the clamping and locking force of the side wall disappears.

[0050] The upward-resetting rectangular frame 410 drives the transmission shaft 501 and T-shaped frame 502 to rise synchronously. After the T-shaped frame 502 moves upward, the damping spring 507 rebounds and extends, lifting the round shaft 505 and the first pressure plate 506 upward. The first pressure plate 506 is separated from the middle of the end cover 2. The second pressing shaft 504 moves upward synchronously, releasing the pressing force on the expansion frame 511. The expansion frame 511 rotates in the opposite direction, and the top shaft 512 falls downward, separating from the connecting flange of the transformer housing 1 and the end cover 2. The first pressing shaft 503 rises synchronously with the T-shaped frame 502, removing the lateral pressing force on the transmission groove 510. The transmission plate 509 drives the second pressure plate 508 to retract inward, and all components return to the initial standby state, ready to cope with sudden short-circuit impacts again.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A transformer housing reinforced structure for resisting sudden short-circuit impact, comprising a transformer housing (1), an end cover (2) installed at the upper end of the transformer housing (1), and a support frame (3) installed at the lower end of the transformer housing (1), characterized in that: The transformer housing (1) is provided with a buffer assembly in the circumferential direction for buffering short-circuit impacts; The buffer assembly includes brackets (401) installed on both sides of the support frame (3). A guide rod (402) is horizontally connected to the bracket (401). The guide rod (402) is slidably connected to two buffer plates (403). Two extension plates (404) are connected to opposite sides of each buffer plate (403). A return spring (405) is connected between the extension plates (404). A side pressure plate (406) is slidably connected to one side of each buffer plate (403). A wedge (407) is connected to the upper end of the side pressure plate (406). A side clamp (408) is connected to the lower end of each side pressure plate (406) near the wedge (407). The upper end of the support frame (3) is provided with a sealing reinforcement component for sealing and reinforcing the end cap (2).

2. The transformer housing reinforcement structure against sudden short-circuit impact according to claim 1, characterized in that: The buffer assembly also includes a transmission rod (409) hinged to the upper end of the buffer plate (403), and a rectangular frame (410) hinged to the other end of the transmission rod (409), the inner walls of the rectangular frame (410) being inclined.

3. The transformer housing reinforcement structure against sudden short-circuit impact as described in claim 2, characterized in that: A buffer gap is left between the side wall of the rectangular frame (410) and the transformer housing (1). The inner walls on both sides of the rectangular frame (410) correspond to the wedge (407), and the outer wall of the wedge (407) fits against the inclined inner wall of the rectangular frame (410).

4. The transformer housing reinforcement structure against sudden short-circuit impact as described in claim 3, characterized in that: The sealing reinforcement assembly includes two drive shafts (501) mounted on the upper end of the rectangular frame (410), and each drive shaft (501) is connected to a T-shaped bracket (502) at its upper end.

5. The transformer housing reinforcement structure against sudden short-circuit impact according to claim 4, characterized in that: The T-shaped frame (502) is connected to a first extrusion shaft (503) on both sides, and a second extrusion shaft (504) is connected to the middle of the lower end of the T-shaped frame (502). A round shaft (505) is slidably connected to the end of the T-shaped frame (502).

6. The transformer housing reinforcement structure against sudden short-circuit impact according to claim 5, characterized in that: The lower end of the circular shaft (505) is connected to a first pressure plate (506), and a damping spring (507) is connected between the first pressure plate (506) and the T-shaped frame (502). The lower end of the first pressure plate (506) is laterally slidably connected to two second pressure plates (508).

7. The transformer housing reinforcement structure against sudden short-circuit impact according to claim 6, characterized in that: The second pressure plate (508) is connected to a transmission plate (509) on its side wall. The transmission plate (509) is provided with a transmission groove (510). The first extrusion shaft (503) is slidably connected to the corresponding transmission groove (510).

8. A transformer housing reinforcement structure for resisting sudden short-circuit impacts according to claim 6, characterized in that: Two staggered expansion frames (511) are rotatably connected to one side of the first pressure plate (506). The staggered part of the expansion frames (511) corresponds to the second extrusion shaft (504). The lower ends of the two expansion frames (511) are connected to a top shaft (512).

Images