Amorphous alloy oil-immersed transformer with anti-short circuit structure

Abstract

The present application relates to power distribution transformer technical field, specifically to a kind of amorphous alloy oil-immersed transformer with short-circuit resistance structure, including oil tank, the insulating sleeve fixed at the top of oil tank and the fixed frame fixed at the bottom of oil tank, by the setting of short-circuit resistance component, limiting slot and rubber ring form rigid constraint and flexible buffer to insulating pad, can effectively limit the displacement and sway of insulating pad under the vibration of iron core and electromagnetic force impact, avoid its and clamping frame, iron core due to friction and wear or fit clearance, to keep the complete insulation isolation function of insulating pad, prevent the partial discharge or short-circuit risk caused by insulating layer damage, significantly improve the structural stability of transformer short-circuit resistance impact, simultaneously, by the setting of injection assembly, can the filtered insulating oil be evenly injected into the gap between iron core and clamping frame, fill micro gap by oil infiltration, strengthen insulation performance, further reduce short-circuit hazard, extend equipment service life and short-circuit resistance effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of distribution transformers, in particular to an amorphous alloy oil-immersed transformer with an anti-short circuit structure. BACKGROUND

[0002] Amorphous alloy transformers are welcomed by power department customers because their no-load loss is 60% to 80% lower than that of ordinary silicon steel sheet core transformers. Since 2010, State Grid has begun to promote the application of amorphous alloy transformers on a large scale. At present, amorphous alloy transformers have basically achieved full popularization in distribution transformers. However, due to structural reasons, the anti-short circuit capability of amorphous alloy transformers still cannot meet the requirements of power grid users, especially the requirements of the strong power grid proposed by State Grid. The defects of amorphous alloy transformers in terms of anti-short circuit performance have gradually become prominent.

[0003] In the anti-short circuit design of existing amorphous alloy oil-immersed transformers, an insulating pad is arranged between the clamping frame and the iron core to achieve insulation isolation. However, there is generally a lack of effective limiting structure for the insulating pad. This defect directly leads to displacement or deflection of the insulating pad under the vibration of the iron core, electromagnetic force impact and temperature stress during equipment operation. In long-term vibration, the insulating pad continuously rubs against the clamping frame and the iron core, causing edge wear, surface scratches, and gaps in the bonding surface, which destroys the stable insulation barrier. At the same time, the unconstrained shaking leads to uneven stress on the insulating pad, which is prone to cracks or deformation, further weakening the insulation performance. In addition, the amorphous alloy iron core itself has a brittle characteristic, and the stability of the insulation system is required to be higher. The displacement of the insulating pad may cause abnormal changes in the insulation distance between the clamping frame and the iron core. Under the action of strong electromagnetic force generated by short-circuit current, it is easy to cause partial discharge or even direct conduction, significantly reducing the anti-short circuit capability of the transformer and bringing serious safety hazards to equipment operation. SUMMARY

[0004] The present application aims to provide an amorphous alloy oil-immersed transformer with an anti-short circuit structure to solve the problem of the displacement of the insulating pad causing abnormal changes in the insulation distance between the clamping frame and the iron core, which may lead to partial discharge or even direct conduction under the action of strong electromagnetic force generated by short-circuit current, significantly reducing the anti-short circuit capability of the transformer and bringing serious safety hazards to equipment operation.

[0005] In order to achieve the above object, the present application provides the following technical scheme: An amorphous alloy oil-immersed transformer with anti-short circuit structure, comprising an oil tank, an insulating sleeve fixed at the top end of the oil tank, and a fixing frame fixed at the bottom end of the oil tank, the outside of the oil tank is fixed with a cooling fin, the inside of the oil tank is provided with an iron core, the inside of the iron core is sleeved with a coil, the outside of the iron core is fixed with a clamping frame, the side of the clamping frame close to the iron core is provided with an insulating pad, the side of the clamping frame close to the insulating pad is provided with an anti-short circuit assembly, and the top end of the oil tank is provided with a liquid injection assembly; the anti-short circuit assembly comprises a limiting groove and an S-shaped pipe, the limiting groove is arranged in the inside of the side of the clamping frame close to the insulating pad, and the S-shaped pipe is arranged on the outside of the side of the clamping frame away from the insulating pad; the liquid injection assembly comprises a liquid supply pump and a purification cylinder, the liquid supply pump is fixedly installed on the outside of the top end of the oil tank, the purification cylinder is fixedly installed on the outside of the top end of the oil tank close to the liquid supply pump, and the inside of the purification cylinder is provided with an anti-blocking assembly.

[0006] Further, the input end of the liquid supply pump is fixed with an oil inlet pipe, the input end of the oil inlet pipe penetrates and is fixedly installed in the inside of the bottom end of the oil tank, the output end of the liquid supply pump is fixedly installed with a conduit, the output end of the conduit penetrates and is fixedly installed with a cavity disc, and the inside of the side of the cavity disc away from the conduit penetrates and is fixedly installed with a spray pipe.

[0007] Further, the output end of the spray pipe penetrates and is fixedly installed in the inside of the top end of the purification cylinder, the inside of the purification cylinder is provided with a filter disc, a plurality of filter holes are arranged in the inside of the filter disc, the bottom end of the purification cylinder penetrates and is fixedly installed with a lead-out pipe, the output end of the lead-out pipe is provided with an electromagnetic three-way ball valve, and the input end of the electromagnetic three-way ball valve is in conductive fixed connection with the output end of the lead-out pipe.

[0008] Further, one of the output ends of the electromagnetic three-way ball valve is in conductive fixed connection with a drainage pipe, the output end of the drainage pipe is in conductive fixed connection with the input end of the S-shaped pipe, one side of the S-shaped pipe is fixed with a plurality of fixing seats, one end of the plurality of fixing seats is fixedly installed on the outside of one side of the clamping frame, the other output end of the electromagnetic three-way ball valve is in conductive fixed connection with a backflow pipe, and the output end of the backflow pipe is arranged in the inside of one side of the oil tank.

[0009] Further, one side of the insulating pad is embeddedly and fixedly adhered in the inside of the limiting groove, a rubber ring is fixedly arranged on the inner wall of the edge of the limiting groove, and the inner wall of the rubber ring is in close contact with the outer surface of the edge of the insulating pad.

[0010] Further, a plurality of discharge holes are arranged in the inside of the insulating pad, and an insulating ring is fixedly arranged in the inside of each of the plurality of discharge holes.

[0011] Further, the clamping frame is fixedly installed with an insulating nozzle on the side near each discharge hole, the input end of the insulating nozzle is fixedly installed on the side of the S-shaped pipe, and the output end of the insulating nozzle is arranged in the insulating ring on the corresponding side.

[0012] Further, the anti-blocking assembly comprises a fan and a limiting frame, the fan is arranged in the cavity disc, the limiting frame is fixedly installed on the inner wall of the purification cylinder near the bottom end of the filter disc, the top end of the purification cylinder is vertically rotatably installed with a rotating shaft, and the top end of the rotating shaft is fixedly installed on the bottom end of the fan.

[0013] Further, the bottom end of the rotating shaft is fixedly installed on the top end of the filter disc, the inner wall of the purification cylinder near the filter disc is fixedly installed with a positioning ring, the edge of the filter disc is rotatably installed in the positioning ring, the top end of the limiting frame near the filter hole is provided with an installation cavity, the inner wall of the top end of the installation cavity is vertically slidably and clampingly installed with a resisting column, the top end of the resisting column is circularly arranged, the outer diameter of the resisting column is smaller than the inner diameter of the filter hole, and the top end of the resisting column abuts against the inside of the filter hole on the corresponding side.

[0014] Further, the bottom end of the resisting column is fixedly installed with a compression spring, the bottom end of the compression spring is embeddedly and fixedly installed on the bottom end of the inner wall of the installation cavity, and the top end of the purification cylinder is rotatably installed with an inspection plate.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] 1. By arranging the anti-short-circuit assembly, the limiting groove and the rubber ring form rigid constraint and flexible buffering on the insulating pad, which can effectively limit the displacement and shaking of the insulating pad under the vibration of the iron core and the impact of electromagnetic force, avoid the abrasion or fitting gap between the insulating pad and the clamping frame and the iron core due to friction, thereby maintaining the complete insulation isolation function of the insulating pad, preventing partial discharge or short circuit caused by damage of the insulating layer, and significantly improving the structural stability of the transformer against short-circuit impact.

[0017] 2. By incorporating anti-clogging components, rapid clogging of local filter holes due to continuous filtration can be prevented. Simultaneously, the contact posts on the limit frame, under the elastic force of the compression spring, always abut against the filter holes of the rotating filter disc, continuously resisting impurities adhering to the filter holes and preventing particle accumulation that could cause blockage. This structure requires no additional power source and achieves self-cleaning through oil flow. It ensures the continuous filtration effect of the purification cylinder on the insulating oil, guarantees the cleanliness of the oil injected through the S-shaped tube and insulating nozzle, and maintains the smoothness of the oil circulation path, preventing abnormal pressure of the injection components or interruption of oil supply due to blockage. This ensures the stable operation of oil replenishment, heat dissipation, and insulation strengthening functions between the insulating pad and the iron core, indirectly improving the reliability of the transformer's short-circuit withstand structure. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the overall cross-sectional three-dimensional structure of the present invention;

[0020] Figure 3 This is a partial cross-sectional perspective view of the liquid supply pump and purification cylinder of the present invention.

[0021] Figure 4 For the present invention Figure 2 Enlarged structural diagram at point A in the middle;

[0022] Figure 5 This is a partial cross-sectional three-dimensional structural diagram of the filter disc and the limiting frame of the present invention;

[0023] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point B;

[0024] Figure 7 This is a three-dimensional structural diagram of the clamping frame and S-shaped tube of the present invention;

[0025] Figure 8 This is a three-dimensional structural diagram of the clamping frame and insulating pad of the present invention;

[0026] Figure 9 This is a three-dimensional structural diagram of the drainage tube and S-shaped tube of the present invention;

[0027] Figure 10 This is a partial cross-sectional perspective view of the clamping frame and insulating pad of the present invention.

[0028] Figure 11 This is a partial cross-sectional three-dimensional structural diagram of the insulating pad and insulating ring of the present invention.

[0029] In the drawings, the components represented by each reference numeral are listed as follows: 1, oil tank; 2, insulating sleeve; 3, fixing frame; 4, iron core; 5, coil; 6, clamping frame; 7, liquid supply pump; 8, oil inlet pipe; 9, purification cylinder; 10, conduit; 11, cavity disc; 12, ejection pipe; 13, filter disc; 14, outlet pipe; 15, electromagnetic three-way ball valve; 16, drainage pipe; 17, S-shaped pipe; 18, fixing seat; 19, limiting groove; 20, rubber ring; 21, insulating pad; 22, discharge hole; 23, insulating ring; 24, insulating nozzle; 25, fan blade; 26, rotating shaft; 27, positioning ring; 28, limiting frame; 29, filter hole; 30, mounting cavity; 31, abutting column; 32, compression spring; 33, maintenance plate; 34, return pipe; 35, cooling fin. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0031] Embodiment one: please refer to Figure 1 - Figure 4 And Figure 7 - Figure 11 An amorphous alloy oil-immersed transformer with an anti-short circuit structure comprises an oil tank 1, an insulating sleeve 2 fixed at the top end of the oil tank 1, and a fixing frame 3 fixed at the bottom end of the oil tank 1. Cooling fins 35 are fixed outside the oil tank 1. An iron core 4 is arranged inside the oil tank 1. A coil 5 is arranged inside the iron core 4. A clamping frame 6 is fixed outside the iron core 4. Insulating pads 21 are arranged on one side of the clamping frame 6 close to the iron core 4. Anti-short circuit assemblies are arranged on one side of the clamping frame 6 close to the insulating pads 21. A liquid injection assembly is arranged at the top end outside the oil tank 1. The anti-short circuit assembly comprises a limiting groove 19 and an S-shaped pipe 17. The limiting groove 19 is arranged inside one side of the clamping frame 6 close to the insulating pad 21. The S-shaped pipe 17 is arranged outside one side of the clamping frame 6 away from the insulating pad 21. The liquid injection assembly comprises a liquid supply pump 7 and a purification cylinder 9. The liquid supply pump 7 is fixedly installed outside one side of the top end of the oil tank 1. The purification cylinder 9 is fixedly installed outside one side of the top end of the oil tank 1 close to the liquid supply pump 7.

[0032] An oil inlet pipe 8 is fixed to the input end of the liquid supply pump 7. The input end of the oil inlet pipe 8 penetrates and is fixedly installed inside the bottom end of the oil tank 1. A conduit 10 is fixedly installed at the output end of the liquid supply pump 7. The output end of the conduit 10 penetrates and is fixedly installed with a cavity disc 11. An ejection pipe 12 is fixedly installed inside one side of the cavity disc 11 away from the conduit 10.

[0033] The output end of the spray pipe 12 penetrates through the top end of the purification cylinder 9, the inside of the purification cylinder 9 is provided with a filter disc 13, a plurality of filter holes 29 are arranged in the inside of the filter disc 13, the bottom end of the purification cylinder 9 is fixedly provided with a lead-out pipe 14, the output end of the lead-out pipe 14 is provided with an electromagnetic three-way ball valve 15, and the input end of the electromagnetic three-way ball valve 15 is fixedly connected with the output end of the lead-out pipe 14.

[0034] One of the output ends of the electromagnetic three-way ball valve 15 is fixedly provided with a drainage pipe 16, the output end of the drainage pipe 16 is fixedly connected with the input end of an S-shaped pipe 17, a plurality of fixed seats 18 are arranged on one side of the S-shaped pipe 17, one end of each of the fixed seats 18 is fixedly arranged on one side of the clamping frame 6, the other output end of the electromagnetic three-way ball valve 15 is fixedly provided with a backflow pipe 34, and the output end of the backflow pipe 34 is arranged in the inside of the oil tank 1.

[0035] The side of the insulating pad 21 is embeddedly and fixedly adhered in the inside of the limiting groove 19, the inner wall of the edge of the limiting groove 19 is fixedly provided with a rubber ring 20, and the inner wall of the rubber ring 20 is attached to the outer surface of the edge of the insulating pad 21.

[0036] A plurality of discharge holes 22 are arranged in the inside of the insulating pad 21, and an insulating ring 23 is fixedly arranged in the inside of each of the discharge holes 22.

[0037] The clamping frame 6 is fixedly provided with an insulating spray head 24 on the inside of the side close to each of the discharge holes 22, the input end of the insulating spray head 24 is fixedly arranged in the inside of one side of the S-shaped pipe 17, and the output end of the insulating spray head 24 is arranged in the inside of the corresponding insulating ring 23.

[0038] In the embodiment, when the amorphous alloy oil-immersed transformer is in operation, the limiting groove 19 on the inside of the clamping frame 6 rigidly positions the insulating pad 21, the rubber ring 20 on the edge is elastically extruded to eliminate the assembly gap, the shaking amplitude of the insulating pad 21 when the iron core 4 is displaced due to electromagnetic vibration can be effectively limited, the hard friction between the insulating pad 21 and the iron core 4 and the clamping frame 6 is avoided, the structural integrity of the insulating pad 21 is maintained, the basic insulation performance is guaranteed, the partial discharge or short circuit caused by damage of the insulating layer is prevented, and the structural stability of the transformer against short circuit impact is significantly improved.

[0039] Meanwhile, the preset temperature sensor (not numbered, can be installed at the gap between the core 4 and the coil 5) and the vibration sensor (not numbered, can be fixed to the outer wall of the clamping frame 6) inside the oil tank 1 monitor the running state in real time: when the monitoring value of the vibration amplitude of the core 4 exceeds the threshold value or the local temperature abnormally rises, the control system triggers the liquid supply pump 7 to start, and the insulating oil at the bottom of the oil tank 1 is extracted through the oil inlet pipe 8, sent into the cavity disc 11 through the conduit 10, and then introduced into the purification cylinder 9 through the outlet pipe 12. After the impurities are filtered through the filter holes 29 of the filter disc 13 in the purification cylinder 9, the clean oil enters the electromagnetic three-way ball valve 15 through the outlet pipe 14. At this time, the electromagnetic three-way ball valve 15 is switched to the drainage pipe 16 passage, and the filtered insulating oil is distributed to each insulating nozzle 24 along the S-shaped pipe 17, and then injected into the small gap between the core 4 and the clamping frame 6 through the guide channel formed by the discharge hole 22 of the insulating pad 21 and the insulating ring 23. The oil flow can not only carry away the heat accumulated in the local area in time to optimize the heat dissipation efficiency and avoid the high-temperature aging of the insulating material, but also can fill the micro gaps by oil immersion to strengthen the insulation performance. In addition, the oil flow can also flush the impurities attached to the surface of the insulating pad 21 at regular intervals to reduce the local electric field distortion and further reduce the short-circuit risk, thereby improving the overall short-circuit resistance effect. When the temperature sensor and the vibration sensor monitor that the state returns to normal, the control system triggers the liquid supply pump 7 to stop running, and the targeted injection is suspended.

[0040] It should be further pointed out that when the amorphous alloy oil-immersed transformer runs for a period of time, some debris and impurities will be generated in the oil inside the oil tank 1. At this time, the electromagnetic three-way ball valve 15 is switched to the return pipe 34 passage, and then the liquid supply pump 7 is started to continuously extract the insulating oil in the oil tank 1 through the oil inlet pipe 8. The extracted insulating oil is sent into the purification cylinder 9 through the conduit 10, the cavity disc 11 and the outlet pipe 12, and then the clean oil is returned to the oil tank 1 through the return pipe 34 and the electromagnetic three-way ball valve 15 after the impurities are removed by the filter holes 29 of the filter disc 13, thereby forming a complete circulating filtration loop. This process can continuously purify the insulating oil in the oil tank 1, prevent the impurities from being deposited at the bottom of the oil tank 1 or flowing into the gap between the core 4 and the clamping frame 6, and prevent the impurities from wearing the insulating pad 21 and blocking the discharge hole 22 and the insulating ring 23. At the same time, the stability of the insulating performance of the oil is maintained, and the risk of local electric field distortion or insulation breakdown caused by impurities is avoided. In addition, it is ensured that the oil injected into the gap between the core 4 and the clamping frame 6 is always in a clean state when the drainage pipe 16 passage is switched next time, so as to ensure the reliable play of the anti-short-circuit auxiliary function.

[0041] It should be noted that the cooperation of the insulating ring 23 and the insulating nozzle 24 can avoid the displacement of the insulating pad 21 caused by the impact force of the oil injection, and the winding structure of the S-shaped pipe 17 can buffer the supply pressure fluctuation, ensuring the uniform and stable injection of the oil. At the same time, the setting of the insulating pad 21 can not only avoid the deformation and blockage of the discharge hole 22 by relying on its own structural strength, but also realize the basic insulation isolation of the iron core 4 and the clamping frame 6. In cooperation with the limiting groove 19 and the rubber ring 20, it can prevent wear caused by vibration displacement, and at the same time provide a stable channel for the injection of insulating oil through the insulating ring 23 into the small gap, so as to strengthen the insulation performance and heat dissipation effect.

[0042] Embodiment two: please refer to Figure 3 、 Figure 5 and Figure 6 , the embodiment further illustrates embodiment one, the inside of the purification cylinder 9 is provided with a anti-blocking assembly.

[0043] The anti-blocking assembly includes a fan blade 25 and a limiting frame 28. The fan blade 25 is arranged inside the cavity disc 11, the limiting frame 28 is fixedly installed on the inner wall of one side of the purification cylinder 9 close to the bottom end of the filter disc 13, the top end of the purification cylinder 9 is vertically penetrated and rotatably installed with a rotating shaft 26, the top end of the rotating shaft 26 is fixedly installed on the middle bottom end of the fan blade 25.

[0044] The bottom end of the rotating shaft 26 is fixedly installed on the middle top end of the filter disc 13, the inner wall of one side of the purification cylinder 9 close to the filter disc 13 is fixedly installed with a positioning ring 27, the edge of the filter disc 13 is rotatably installed inside the positioning ring 27, the top end of the limiting frame 28 close to the filter hole 29 is provided with an installation cavity 30, the inside of the top end of the installation cavity 30 is vertically slidably and clampingly installed with a resisting column 31, the top end of the resisting column 31 is arc-shaped, the outer diameter of the resisting column 31 is smaller than the inner diameter of the filter hole 29, and the top end of the resisting column 31 abuts against the inside of the filter hole 29 on the corresponding side.

[0045] The bottom end of the resisting column 31 is fixedly installed with a compression spring 32, the bottom end of the compression spring 32 is embeddedly and fixedly installed on the bottom end inner wall of the installation cavity 30, and the top end of the purification cylinder 9 is rotatably installed with an inspection plate 33.

[0046] In the embodiment, when the liquid supply pump 7 starts, the insulating oil flows into the cavity disc 11 through the conduit 10, the high-speed flowing oil impacts the fan blade 25 to make it rotate, and then drives the rotating shaft 26 fixed to the bottom end of the fan blade 25 to rotate synchronously, the bottom end of the rotating shaft 26 is fixedly connected with the middle part of the top end of the filter disc 13, so that the filter disc 13 rotates uniformly in the purification cylinder 9, at the same time, the abutting column 31 on the limiting frame 28 always keeps in contact with the bottom surface of the filter disc 13 under the elastic force of the compression spring 32, when the filter disc 13 rotates, the filter holes 29 on the surface of the filter disc 13 pass above the abutting column 31 in turn, the arc-shaped structure on the top end of the abutting column 31 is embedded into the filter hole 29, and then the abutting column 31 forms abutting and scraping on the impurities attached in the filter hole 29 with the rotation of the filter disc 13, so that the impurities are cleaned, and the filter holes 29 are prevented from being blocked by the accumulation of the particulate impurities, the elastic expansion and contraction characteristics of the compression spring 32 can adapt to the rotation rhythm of the filter disc 13, so that the abutting force is ensured and the rigid damage to the filter disc 13 is avoided, in addition, the maintenance plate 33 at the top end of the purification cylinder 9 can be opened by rotating, so that the filter disc 13, the abutting column 31 and other components can be regularly inspected, maintained or cleaned of the residual impurities, the anti-blocking structure does not need an additional power source, and is self-driven to clean the blockage by relying on the kinetic energy of the oil flow, so that the problem of the filter hole 29 blocked by long-term filtering is effectively solved, the filtering efficiency of the purification cylinder 9 on the insulating oil is stabilized, and the clean oil is continuously provided for the liquid injection assembly.

[0047] It should be further explained that the cooperation of the anti-blocking assembly and the filter disc 13 can keep the insulating oil in a low-impurity state during the circulating filtration or directional injection, indirectly improves the smoothness of the insulating nozzle 24 and the discharge hole 22, and further ensures the reliable play of the oil auxiliary insulation function of the anti-short circuit assembly.

[0048] It should be noted that, in the present document, the terms such as first and second, etc. are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0049] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An amorphous alloy oil-immersed transformer with a short-circuit resistant structure, comprising an oil tank (1), an insulating bushing (2) fixed to the top of the oil tank (1), and a fixing frame (3) fixed to the bottom of the oil tank (1), characterized in that: The oil tank (1) is fixed with heat sink (35) on the outside. The oil tank (1) is provided with iron core (4) inside. The iron core (4) is fitted with coil (5) inside. The iron core (4) is fixed with clamping frame (6) on the outside. The clamping frame (6) is provided with insulating pad (21) on the side near the iron core (4). The clamping frame (6) is provided with short circuit protection component on the side near the insulating pad (21). The top of the oil tank (1) is provided with liquid injection component. The short-circuit protection assembly includes a limiting groove (19) and an S-shaped tube (17). The limiting groove (19) is located inside the clamping frame (6) on the side close to the insulating pad (21), and the S-shaped tube (17) is located outside the clamping frame (6) on the side away from the insulating pad (21). The liquid injection assembly includes a liquid supply pump (7) and a purification cylinder (9). The liquid supply pump (7) is fixedly installed on the outside of the top side of the oil tank (1). The purification cylinder (9) is fixedly installed on the outside of the top side of the oil tank (1) near the liquid supply pump (7). An anti-clogging component is provided inside the purification cylinder (9). One side of the insulating pad (21) is embedded and adhered to the inside of the limiting groove (19). A rubber ring (20) is fixed around the inner wall of the edge of the limiting groove (19). The inner wall of the rubber ring (20) is in contact with the outer surface of the edge of the insulating pad (21). The insulating pad (21) has several discharge holes (22) through it, and an insulating ring (23) is fixed through each of the discharge holes (22). An insulating nozzle (24) is fixedly installed inside the clamping frame (6) on the side near each discharge hole (22). The input end of the insulating nozzle (24) is fixedly installed inside the side of the S-shaped tube (17), and the output end of the insulating nozzle (24) is located inside the insulating ring (23) on the corresponding side.

2. The amorphous alloy oil-immersed transformer with short-circuit protection structure according to claim 1, characterized in that: The input end of the liquid supply pump (7) is fixed with an oil inlet pipe (8), the input end of the oil inlet pipe (8) is fixedly installed inside the bottom end of the oil tank (1), the output end of the liquid supply pump (7) is fixedly installed with a conduit (10), the output end of the conduit (10) is fixedly installed with a cavity plate (11), and the side of the cavity plate (11) away from the conduit (10) is fixedly installed with a spray pipe (12).

3. An amorphous alloy oil-immersed transformer with a short-circuit protection structure according to claim 2, characterized in that: The output end of the spray pipe (12) is fixedly installed inside the top side of the purification cylinder (9). The purification cylinder (9) is provided with a filter plate (13). The filter plate (13) has several filter holes (29) through it. The bottom end of the purification cylinder (9) is fixedly installed with an outlet pipe (14). The output end of the outlet pipe (14) is provided with an electromagnetic three-way ball valve (15). The input end of the electromagnetic three-way ball valve (15) is connected to the output end of the outlet pipe (14).

4. An amorphous alloy oil-immersed transformer with a short-circuit protection structure according to claim 3, characterized in that: One of the output ends of the electromagnetic three-way ball valve (15) is connected to a drain pipe (16), the output end of the drain pipe (16) is connected to the input end of the S-shaped tube (17), and a number of fixing seats (18) are fixed on one side of the S-shaped tube (17). One end of each of the fixing seats (18) is fixedly installed on the outside of one side of the clamping frame (6). The other output end of the electromagnetic three-way ball valve (15) is connected to a return pipe (34), and the output end of the return pipe (34) is located inside one side of the oil tank (1).

5. An amorphous alloy oil-immersed transformer with a short-circuit protection structure according to claim 3, characterized in that: The anti-clogging component includes a fan blade (25) and a limiting frame (28). The fan blade (25) is disposed inside the cavity disk (11). The limiting frame (28) is fixedly installed on the inner wall of the purification cylinder (9) near the bottom of the filter disk (13). A rotating shaft (26) is vertically and rotatably installed through the middle of the top of the purification cylinder (9). The top of the rotating shaft (26) is fixedly installed at the middle of the bottom of the fan blade (25).

6. An amorphous alloy oil-immersed transformer with a short-circuit protection structure according to claim 5, characterized in that: The bottom end of the rotating shaft (26) is fixedly installed at the top center of the filter disc (13). A positioning ring (27) is fixedly installed on the inner wall of the purification cylinder (9) near the filter disc (13). The edge of the filter disc (13) is rotatably installed inside the positioning ring (27). The top of the limiting frame (28) near the filter hole (29) is provided with an installation cavity (30). The top of the installation cavity (30) is vertically slidably fitted with an abutment column (31). The top of the abutment column (31) is arc-shaped. The outer diameter of the abutment column (31) is smaller than the inner diameter of the filter hole (29). The top of the abutment column (31) abuts against the inside of the filter hole (29) on the corresponding side.

7. An amorphous alloy oil-immersed transformer with a short-circuit protection structure according to claim 6, characterized in that: A compression spring (32) is fixedly installed at the bottom end of the contact column (31), and the bottom end of the compression spring (32) is embedded and fixedly installed on the bottom inner wall of the mounting cavity (30). A maintenance plate (33) is rotatably installed at the top end of the purification cylinder (9).

Images