Oil-immersed amorphous alloy transformer

Abstract

The invention relates to the technical field of power equipment, in particular to an oil-immersed amorphous alloy transformer which comprises a transformer body and a filtering assembly connected with an oil way system of the transformer body, and the filtering assembly comprises a collecting box and filtering pipes arranged on the two sides of the collecting box. The top of each filter pipe communicates into conveying channels arranged on the two sides of the top of the collecting box, a main shaft is coaxially arranged in each filter pipe, a spiral blade is arranged on the outer wall of each main shaft, an annular adsorption magnet is coaxially arranged outside each filter pipe, and a piston block is slidably installed in each conveying channel. According to the technical scheme, impurities such as amorphous fine chippings are adsorbed to the inner wall of the filter pipe through the annular adsorption magnet, the impurities adsorbed to the inner wall of the filter pipe can be conveyed upwards in time when the spiral blade rotates, the piston block reciprocates in the conveying channel, the impurities are pushed into the collecting box, and the impurities are prevented from being accumulated in an oil way for a long time.

Description

Technical Field

[0001] The invention relates to the technical field of power equipment, and in particular to an oil-immersed amorphous alloy transformer. Background Art

[0002] Amorphous alloy cores are thin and fragile, so amorphous debris is inevitable during the assembly process. Larger debris can be removed in time during assembly, but smaller debris (less than 3mm in diameter) is not easy to find and remove, and falls into the clamps or the surface gaps of the coils and other difficult-to-remove locations. The amorphous alloy debris in the oil-immersed amorphous alloy transformer will follow the flow of transformer oil and fill the entire transformer during operation. Under the action of the electric field, these small debris will form a conductive "bridge", posing a huge safety threat to the insulation of the transformer.

[0003] The existing technology usually welds a mesh made of 0.5mm iron wire above and below the corrugated sheet, and places a strong magnet in the mesh. When the oil with amorphous fine debris passes through, the amorphous fine debris will be firmly adsorbed by the strong magnet, thereby removing the amorphous debris and eliminating the insulation risk caused by the debris. However, the debris always accumulates in the oil circuit. When it accumulates to a certain extent, the adsorption effect of the strong magnet is reduced, and the accumulation of debris has a certain impact on the oil circuit. Summary of the invention

[0004] In view of the above problems, it is necessary to provide an oil-immersed amorphous alloy transformer to address the problems of the prior art.

[0005] In order to solve the problems of the prior art, the technical solution adopted by the present invention is:

[0006] An oil-immersed amorphous alloy transformer comprises a transformer body and a filter assembly of an oil circuit system connected to the transformer body, the filter assembly comprises a collection box and filter tubes arranged on both sides of the collection box, the top of each filter tube is connected to a delivery channel arranged on both sides of the top of the collection box, an oil inlet branch extending radially along the filter tube is arranged at the upper end of the filter tube, the bottom end of the filter tube is connected to the oil outlet branch, the oil inlet branch and the oil outlet branch of the two filter tubes are respectively connected to a three-way valve, the three-way valve is provided with a main oil pipe connected to the oil circuit system of the transformer body; a main shaft is coaxially arranged in the filter tube, the outer wall of the main shaft is provided with spiral blades, and a spiral passage is formed between the spiral blades and the inner wall of the filter tube The filter assembly further comprises a first transmission unit for driving the main shaft and the spiral blades to rotate, and the rotation of the spiral blades moves the impurities adsorbed on the inner wall of the filter tube to the top of the filter tube; the top of the main shaft and the spiral blades are flush with the bottom surface of the conveying channel, and a piston block is slidably installed in the conveying channel, and the piston block is in contact with the bottom of the conveying channel. The first transmission unit drives the piston block to reciprocate horizontally along the radial direction of the main shaft in the conveying channel, and the piston block pushes the impurities conveyed to the top of the filter tube by the spiral blades into the collection box.

[0007] Preferably, a filter screen is coaxially arranged at the connection between the oil outlet branch pipe and the filter tube, and an axial hole for avoiding the main shaft is arranged at the axis of the filter screen.

[0008] Preferably, the piston block has the same longitudinal section as the conveying channel, a fitting rubber is provided at the bottom of the piston block, the fitting rubber fits the inner wall of the conveying channel, and the length of the fitting rubber in the radial direction of the filter tube is greater than the outer diameter of the filter tube.

[0009] Preferably, an extension plate extending along the length direction of the conveying channel is provided at one end of the piston block away from the collecting box, and the extension plate extends to the outside of the conveying channel through a guide hole provided on the conveying channel, and an articulated arm is rotatably installed at one end of the extension plate located outside the conveying channel, and the articulated arm is horizontally arranged; the first transmission unit includes a first turntable rotatably installed on the outside of the filter tube, the axis of the first turntable is parallel to the axis of the filter tube, a connecting rod is eccentrically arranged on the first turntable, the axis of the connecting rod is parallel to the axis of the first turntable, the connecting rod is rotatably connected to the end of the articulated arm away from the extension plate, and the rotation of the first turntable drives the piston block to move back and forth in the conveying channel.

[0010] Preferably, the straight-line distance between the axis of the connecting rod and the axis of the first rotating disk is greater than the radius of the filter tube.

[0011] Preferably, a shaft is coaxially arranged at the bottom of the first turntable, and a first synchronous wheel is installed at the bottom end of the shaft and the bottom end of the main shaft, and the two first synchronous wheels are connected by a first transmission belt; a first bevel gear is coaxially installed on the first synchronous wheel located at the bottom of the main shaft, and two second bevel gears are rotatably installed at the bottom of the collecting box, the axes of the two second bevel gears are on the same straight line and perpendicular to the axis of the filter tube, and the two second bevel gears are respectively meshed and connected with the first bevel gears on both sides of the collecting box; a first driving unit is arranged at the bottom of the collecting box, and the first driving unit is used to drive the second bevel gear on one side to rotate separately.

[0012] Preferably, the first driving unit includes a driving drum rotatably mounted in a limit mounting plate arranged at the bottom of the collecting box, the axis of the driving drum and the axis of the second bevel gear are in the same straight line, a transmission shaft is coaxially mounted in the driving drum, and a third turntable is coaxially mounted at both ends of the transmission shaft, and elastic columns are respectively provided on the two third turntables facing the second bevel gear; a second turntable is provided on the side of the second bevel gear facing the third turntable, and a slot located on the rotation path of the third turntable is provided on the second turntable; the elastic column is located on one side of the axis of the third turntable and keeps the axis parallel to the axis of the third turntable, the transmission shaft moves along the axis of the driving drum to the third turntable on one side to fit the surface of the second turntable, and when the elastic column is inserted into the slot, the third turntable rotates synchronously with the second turntable.

[0013] Preferably, the first driving unit includes a rotary driver, the working end of the rotary driver is connected to the driving drum via a third transmission belt; the outer wall of the transmission shaft is provided with a spline groove extending along the axis of the transmission shaft, and the transmission shaft is spline-connected to the driving drum via the spline groove.

[0014] Preferably, the first driving unit includes a mounting frame, both ends of the transmission shaft are rotatably mounted on the mounting frame, and a horizontally extending rack is provided at one end of the mounting frame close to the three-way valve; a valve core is rotatably mounted inside the three-way valve, and the rotating axis of the valve core is horizontally arranged perpendicular to the axis of the driving drum, and a second synchronous wheel coaxially connected to the valve core is arranged on the outside of the three-way valve, and the upper and lower second synchronous wheels are connected by a second transmission belt; a handle is coaxially mounted on the second synchronous wheel located above; a gear is coaxially mounted on the second synchronous wheel located below, and the gear is meshed with the rack on the mounting frame, and when the valve core of the three-way valve rotates and changes direction, it drives the mounting frame to translate toward the side of the filter tube that is not connected to the oil circuit, so that the third turntable on the side of the transmission shaft that is not connected to the oil circuit fits with the second turntable below the filter tube that is not connected to the oil circuit.

[0015] Preferably, at least two guide rods parallel to the axis of the driving drum are provided at the bottom of the collecting box, and the mounting frame is sleeved on the guide rods and slides along the guide rods.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] First, a stable spiral channel is formed between the spiral blades and the inner wall of the filter tube in the present invention, and an annular adsorption magnet is coaxially arranged outside the filter tube. When the oil flow with impurities such as amorphous fine debris passes through the spiral channel in the filter tube, the impurities such as amorphous fine debris will be adsorbed on the inner wall of the filter tube by the annular adsorption magnet. When the spiral blades rotate, the impurities adsorbed on the inner wall of the filter tube can be transported upward in time, thereby preventing the impurities from clogging the filter tube and affecting the smoothness of the oil path.

[0018] Secondly, the piston block in the present invention can reciprocate in the delivery channel, which can block the top opening of the filter tube when oil enters the filter tube to prevent oil leakage, and can push impurities into the collection box, thereby avoiding the long-term accumulation of impurities in the oil circuit. Impurities will not form a large amount of accumulation in the oil circuit, ensuring the smooth flow of the oil circuit, reducing obstacles to the normal circulation of transformer oil, and being beneficial to the stable operation of the transformer.

[0019] Thirdly, the first transmission unit in the present invention can synchronize the process of the main shaft driving the spiral blades to transport impurities to the top of the filter tube with the process of the piston block pushing the impurities into the collection box in a timely and accurate manner, thereby improving the efficiency and effect of impurity collection. The first drive unit can cooperate with the three-way valve to switch the drive object and realize the switching of different working states of the filter tubes on both sides. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a stereogram of an oil-immersed amorphous alloy transformer;

[0021] Figure 2 It is a front view of an oil-immersed amorphous alloy transformer;

[0022] Figure 3 It is a three-dimensional filter component of an oil-immersed amorphous alloy transformer. Figure 1 ;

[0023] Figure 4 It is a side view of a filter assembly of an oil-immersed amorphous alloy transformer;

[0024] Figure 5 yes Figure 4 Cross-sectional view at AA of FIG.

[0025] Figure 6 It is a front view of a filter assembly of an oil-immersed amorphous alloy transformer;

[0026] Figure 7 yes Figure 6 A cross-sectional view of the section at BB;

[0027] Figure 8 yes Figure 7 A partial enlarged view of point C;

[0028] Fig. 9 It is a three-dimensional filter component of an oil-immersed amorphous alloy transformer. Figure 2 ;

[0029] Fig.10 It is a three-dimensional structural exploded diagram of a filter component of an oil-immersed amorphous alloy transformer.

[0030] The numbers in the figure are: 1. Transformer body; 2. Filter assembly; 21. Collection box; 211. Delivery channel; 212. Guide hole; 213. Limit mounting plate; 214. Guide rod; 22. Filter tube; 221. Oil inlet branch pipe; 222. Oil outlet branch pipe; 223. Main shaft; 224. Spiral blade; 225. Annular adsorption magnet; 226. Filter screen; 23. Three-way valve; 231. Main oil pipe; 232. Valve core; 233. Second synchronous wheel; 234. Second transmission belt; 235. Handle; 236. Gear; 24. First transmission unit; 241. First Turntable; 242, connecting rod; 243, shaft; 244, first synchronous wheel; 245, first transmission belt; 246, first bevel gear; 247, second bevel gear; 248, second turntable; 249, slot; 25, piston block; 251, fitting rubber; 252, extension plate; 253, articulated arm; 26, first drive unit; 261, driving drum; 262, transmission shaft; 263, third turntable; 264, elastic column; 265, rotary driver; 266, third transmission belt; 267, spline groove; 268, mounting bracket; 269, rack. DETAILED DESCRIPTION

[0031] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] Reference Figures 1 to 10 :

[0033] An oil-immersed amorphous alloy transformer comprises a transformer body 1 and a filter assembly 2 of an oil circuit system connected to the transformer body 1, the filter assembly 2 comprises a collection box 21 and filter tubes 22 arranged on both sides of the collection box 21, the top of each filter tube 22 is connected to a delivery channel 211 arranged on both sides of the top of the collection box 21, an oil inlet branch 221 extending radially along the filter tube 22 is arranged at the upper end of the filter tube 22, the bottom end of the filter tube 22 is connected to an oil outlet branch 222, the oil inlet branch 221 and the oil outlet branch 222 of the two filter tubes 22 are respectively connected to a three-way valve 23, and the three-way valve 23 is provided with a main oil pipe 231 connected to the oil circuit system of the transformer body 1; a main shaft 223 is coaxially arranged in the filter tube 22, and a spiral blade 224 is arranged on the outer wall of the main shaft 223, and a spiral channel is formed between the spiral blade 224 and the inner wall of the filter tube 22, and the filter tube 22 An annular adsorption magnet 225 is coaxially arranged on the outside, and the annular adsorption magnet 225 fits the outer wall of the filter tube 22. The bottom end of the main shaft 223 passes through the oil outlet branch pipe 222 and extends to the outside of the oil outlet branch pipe 222. The filter assembly 2 also includes a first transmission unit 24 arranged on the outside of the filter tube 22 for driving the main shaft 223 and the spiral blade 224 to rotate. The spiral blade 224 rotates to move the impurities adsorbed on the inner wall of the filter tube 22 toward the top of the filter tube 22; the top of the main shaft 223 and the spiral blade 224 are flush with the bottom surface of the conveying channel 211, and a piston block 25 is slidably installed in the conveying channel 211. The piston block 25 fits the bottom of the conveying channel 211. The first transmission unit 24 drives the piston block 25 to reciprocate horizontally along the radial direction of the main shaft 223 in the conveying channel 211, and the piston block 25 pushes the impurities conveyed to the top of the filter tube 22 by the spiral blade 224 into the collection box 21.

[0034] When the oil-immersed amorphous alloy transformer in the present application is in operation, the transformer oil circulates in the oil circuit system. The transformer oil flows from the oil circuit system of the transformer body 1 through the main oil pipe 231 into the three-way valve 23, and then enters the filter tube 22 through the oil inlet branch pipe 221 at the top of one of the filter tubes 22. Since the filter tube 22 is coaxially provided with an annular adsorption magnet 225 on the outside, when the oil with impurities such as amorphous fine debris flows through the spiral channel in the filter tube 22, the impurities such as amorphous fine debris will be adsorbed on the inner wall of the filter tube 22 by the annular adsorption magnet 225. Then the transformer oil flows from the oil outlet branch pipe 222 at the bottom of the filter tube 22 through the three-way valve 23 and the main oil pipe 231 back to the oil circuit system of the transformer body 1, completing a filtering cycle. In the above process, the first transmission unit 24 keeps the main shaft 223 and the spiral blade 224 stationary, so that a stable spiral channel is formed between the spiral blade 224 and the inner wall of the filter tube 22. After a period of impurity removal, the staff can manually or electrically drive the three-way valve 23 to change the moving path of the transformer oil, so that the transformer oil enters the filter tube 22 on the other side of the collection box 21. While the filter tube 22 on the other side is adsorbing amorphous fine debris, the first transmission unit 24 drives the spiral blade 224 at the vacant filter tube 22 to rotate, and moves the impurities adsorbed on the inner wall of the filter tube 22 along the spiral channel to the top of the filter tube 22. When the impurities are transported to the top of the filter tube 22 by the spiral blade 224, since the top of the main shaft 223 and the spiral blade 224 are flush with the bottom surface of the conveying channel 211, and the piston block 25 is slidably installed in the conveying channel 211, the first transmission unit 24 simultaneously drives the piston block 25 to reciprocate horizontally along the radial direction of the main shaft 223 in the conveying channel 211. When the piston block 25 moves toward the filter tube 22, the impurities transported to the top of the filter tube 22 by the spiral blade 224 are pushed into the conveying channel 211 of the collection box 21, and the impurities move into the collection box 21 along the inclined conveying channel 211, thereby realizing the collection of impurities. Unlike the prior art in which debris always accumulates in the oil circuit and the strong magnet adsorption effect decreases with the degree of accumulation, the present device timely transports the impurities adsorbed on the inner wall of the filter tube 22 upward through the spiral blade 224, and then uses the piston block 25 to push the impurities into the collection box 21, thereby avoiding the long-term accumulation of impurities in the oil circuit. Impurities will not form a large amount of accumulation in the oil circuit, ensuring the smoothness of the oil circuit, reducing the obstruction to the normal circulation of transformer oil, and facilitating the stable operation of the transformer. The efficiency of impurity removal is improved, amorphous debris can be removed more effectively, and the insulation risks caused by debris can be reduced.

[0035] In order to improve the filtering efficiency of amorphous fine debris, the following features are specifically set:

[0036] A filter screen 226 is coaxially arranged at the connection between the oil outlet branch pipe 222 and the filter pipe 22 , and an axial hole for avoiding the main shaft 223 is arranged at the axis of the filter screen 226 .

[0037] When the oil-immersed amorphous alloy transformer is in operation, the transformer oil containing impurities such as amorphous fine debris enters the filter tube 22 from the oil inlet branch pipe 221, and then continues to flow to the oil outlet branch pipe 222 on the basis of the annular adsorption magnet 225 adsorbing some impurities. When the oil flow reaches the connection between the oil outlet branch pipe 222 and the filter tube 22, the filter 226 begins to play a role. The filter 226 will intercept impurities such as amorphous fine debris that have not been adsorbed in the oil flow. Since the axis of the filter 226 is provided with an axial hole to avoid the main shaft 223, the main shaft 223 can pass through normally without affecting its rotation and driving the spiral blade 224 to transport impurities and other normal work, while the oil needs to be filtered by the filter 226 before entering the oil outlet branch pipe 222, and then flow back to the oil circuit system of the transformer body 1, thereby further filtering the impurities in the oil.

[0038] In order to ensure the pushing effect of the piston block 25 on the amorphous fine debris and to achieve the purpose that the piston block 25 can block the top opening of the filter tube 22 when the transformer oil enters the inside of the filter tube 22, the following features are specifically set:

[0039] The piston block 25 has the same longitudinal section as the conveying channel 211 . A fitting rubber 251 is provided at the bottom of the piston block 25 . The fitting rubber 251 fits the inner wall of the conveying channel 211 . The length of the fitting rubber 251 in the radial direction of the filter tube 22 is greater than the outer diameter of the filter tube 22 .

[0040] In this embodiment, the piston block 25 has the same longitudinal section as the delivery channel 211, and a fitting rubber 251 is provided at the bottom of the piston block 25, the fitting rubber 251 fits the inner wall of the delivery channel 211, and the length of the fitting rubber 251 in the radial direction of the filter tube 22 is greater than the outer diameter of the filter tube 22, so the piston block 25 can tightly block the connection between the top of the filter tube 22 and the delivery channel 211, prevent the transformer oil from overflowing from the top of the filter tube 22, and ensure that the transformer oil can only enter the filter tube 22 from the oil inlet branch 221. After the spiral blade 224 transports impurities such as amorphous fine debris adsorbed on the inner wall of the filter tube 22 to the top of the filter tube 22, the first transmission unit 24 drives the piston block 25 to move toward the filter tube 22 again. At this time, the fitting rubber 251 at the bottom of the piston block 25 can closely contact the impurities at the top opening of the filter tube 22, and the thrust of the piston block 25 is used to push the impurities from the top opening of the filter tube 22 into the collection box 21, thereby achieving effective collection of impurities such as amorphous fine debris.

[0041] In order to realize the reciprocating movement of the piston block 25 in the delivery channel 211, the following features are specifically provided:

[0042] An extension plate 252 extending along the length direction of the conveying channel 211 is provided at the end of the piston block 25 away from the collecting box 21, and the extension plate 252 extends to the outside of the conveying channel 211 through the guide hole 212 provided on the conveying channel 211, and an articulated arm 253 is rotatably installed at one end of the extension plate 252 located outside the conveying channel 211, and the articulated arm 253 is horizontally arranged; the first transmission unit 24 includes a first turntable 241 rotatably installed on the outside of the filter tube 22, the axis of the first turntable 241 is parallel to the axis of the filter tube 22, and a connecting rod 242 is eccentrically arranged on the first turntable 241, and the axis of the connecting rod 242 is parallel to the axis of the first turntable 241, and the connecting rod 242 is rotatably connected to the end of the articulated arm 253 away from the extension plate 252, and the rotation of the first turntable 241 drives the piston block 25 to move back and forth in the conveying channel 211.

[0043] In this embodiment, the first rotating disk 241 in the first transmission unit 24 is rotatably mounted outside the filter tube 22, and its axis is parallel to the axis of the filter tube 22. When the first transmission unit 24 drives the first rotating disk 241 to rotate, the connecting rod 242 will make a circular motion along with the first rotating disk 241. Since the connecting rod 242 is rotatably connected to the articulated arm 253, the articulated arm 253 is rotatably connected to the extension plate 252, and the extension plate 252 is connected to the piston block 25, during the circular motion of the connecting rod 242, the extension plate 252 will be driven by the articulated arm 253 to make horizontal reciprocating motion in the guide hole 212. The movement of the extension plate 252 will drive the piston block 25 to reciprocate in the conveying channel 211 along the length direction of the conveying channel 211.

[0044] In order to ensure that the piston block 25 can block and completely release the top end of the filter tube 22 when reciprocating, the following features are specifically set:

[0045] The straight-line distance between the axis of the connecting rod 242 and the axis of the first rotating disk 241 is greater than the radius of the filter tube 22 .

[0046] In this embodiment, the linear distance between the axis of the connecting rod 242 and the axis of the first rotating disk 241 is greater than the radius of the filter tube 22, which ensures that the piston block 25 can accurately and completely cover the top opening of the filter tube 22 when moving toward the filter tube 22, thereby achieving effective blocking, preventing transformer oil leakage, ensuring the normal progress of the filtering process, and improving the filtering effect. When the piston block 25 moves away from the filter tube 22, this setting enables the piston block 25 to completely leave the top of the filter tube 22, thereby moving the amorphous fine debris upward, and then completely pushing these impurities into the collection box 21, avoiding impurity residues, improving the thoroughness of impurity collection, and further improving the filter assembly 2's ability to remove impurities in transformer oil.

[0047] In order to achieve the purpose that the main shafts 223 on both sides can rotate independently and drive the first rotating disk 241 on the side to rotate synchronously during the rotation, the following features are specifically set:

[0048] A shaft rod 243 is coaxially arranged at the bottom of the first turntable 241, and a first synchronous wheel 244 is installed at the bottom end of the shaft rod 243 and the bottom end of the main shaft 223, and the two first synchronous wheels 244 are connected by a first transmission belt 245; a first bevel gear 246 is coaxially installed on the first synchronous wheel 244 located at the bottom of the main shaft 223, and two second bevel gears 247 are rotatably installed at the bottom of the collecting box 21, and the axes of the two second bevel gears 247 are on the same straight line and perpendicular to the axis of the filter tube 22, and the two second bevel gears 247 are respectively meshed and connected with the first bevel gears 246 on both sides of the collecting box 21; a first driving unit 26 is arranged at the bottom of the collecting box 21, and the first driving unit 26 is used to drive the second bevel gear 247 on one side to rotate separately.

[0049] In this embodiment, when the first driving unit 26 is started and selects to drive the second bevel gear 247 on one side to rotate, for example, the second bevel gear 247 on the left side is driven. The second bevel gear 247 on the side rotates, and since it is meshed and connected with the first bevel gear 246 on the left side at the bottom of the main shaft 223, it will drive the first bevel gear 246 on the left side to rotate. Since the first bevel gear 246 is coaxially mounted on the first synchronous wheel 244 at the bottom of the main shaft 223, the first synchronous wheel 244 on the left side will rotate with the first bevel gear 246. And because the first synchronous wheel 244 is transmission-connected with the first synchronous wheel 244 at the bottom of the shaft 243 through the first transmission belt 245, and the shaft 243 is coaxially mounted at the bottom of the first rotating disk 241, the main shaft 223 on the left side will start to rotate, and at the same time drive the first rotating disk 241 on the left side to rotate synchronously. When the first driving unit 26 drives the second bevel gear 247 on the left side to rotate, the second bevel gear 247 on the other side is not driven and is in a stationary state. The transformer oil enters the filter tube 22 on this side, and the main shaft 223 and the first turntable 241 on the other side will not be driven to rotate, keeping the piston block 25 stationary at the opening above the filter tube 22 to block it. When the main shaft 223 on the left side rotates, the spiral blades 224 on its outer wall will move the impurities adsorbed on the inner wall of the left filter tube 22 to the top of the filter tube 22. At the same time, the first turntable 241 on the left side rotates through the connecting rod 242, the articulated arm 253 and the extension plate 252 to drive the piston block 25 to move back and forth in the conveying channel 211, thereby blocking the top of the left filter tube 22 and pushing and collecting impurities. Similarly, when the first drive unit 26 drives the second bevel gear 247 on the right side to rotate, the main shaft 223 and the first turntable 241 on the right side will perform corresponding actions to realize the impurity cleaning function of the right filter tube 22.

[0050] In order to solve the problem of how the first driving unit 26 switches to drive the second bevel gears 247 on both sides to rotate, the following features are specifically set:

[0051] The first driving unit 26 includes a driving drum 261 rotatably mounted in a limiting mounting plate 213 provided at the bottom of the collecting box 21. The axis of the driving drum 261 is in the same straight line as the axis of the second bevel gear 247. A transmission shaft 262 is coaxially mounted in the driving drum 261. Third rotating disks 263 are coaxially mounted at both ends of the transmission shaft 262. Elastic columns 264 are respectively provided on one side of the two third rotating disks 263 facing the second bevel gear 247. The second bevel gear 247 faces the third rotating disk 263. A second turntable 248 is provided on one side of the disk 263, and a slot 249 is provided on the second turntable 248, which is located on the rotation path of the third turntable 263; the elastic column 264 is located on one side of the axis of the third turntable 263 and keeps the axis parallel to the axis of the third turntable 263, and the transmission shaft 262 moves along the axis of the driving cylinder 261 to one side of the third turntable 263 to fit the surface of the second turntable 248, and when the elastic column 264 is inserted into the slot 249, the third turntable 263 rotates synchronously with the second turntable 248.

[0052] In this embodiment, the transmission shaft 262 is located in the driving drum 261 and rotates synchronously with the driving drum 261. When the second bevel gear 247 on the left side needs to be driven, the transmission shaft 262 is controlled to move to the left along the axis of the driving drum 261 until the third rotating disk 263 on the left side is attached to the surface of the second rotating disk 248 on the left side. At this time, the elastic column 264 on the third rotating disk 263 on the left side is inserted into the slot 249 on the second rotating disk 248 on the left side. Then the first driving unit 26 is started, the driving drum 261 rotates, and the transmission shaft 262 and the third rotating disk 263 on the left side rotate together. Since the elastic column 264 is inserted into the slot 249, the third rotating disk 263 on the left side rotates synchronously with the second rotating disk 248 on the left side, and the second rotating disk 248 is coaxially connected with the second bevel gear 247, so the second bevel gear 247 on the left side starts to rotate. The first bevel gear 246, the first synchronous wheel 244 and the first transmission belt 245 drive the left main shaft 223 and the first rotating disk 241 to rotate, thereby cleaning the impurities in the left filter tube 22. In this embodiment, the first driving unit 26 switches and drives the second bevel gears 247 on both sides through the axial movement of the transmission shaft 262, thereby selectively driving the rotation of the main shafts 223 in the filter tubes 22 on both sides, so that the filter tubes 22 on both sides perform filtering and impurity removal processes respectively.

[0053] In order to achieve the purpose of keeping the transmission shaft 262 rotating synchronously while moving in the driving drum 261, the following features are specifically provided:

[0054] The first driving unit 26 includes a rotary driver 265, the working end of which is connected to the driving drum 261 via a third transmission belt 266; the outer wall of the transmission shaft 262 is provided with a spline groove 267 extending along the axis of the transmission shaft 262, and the transmission shaft 262 is spline-connected to the driving drum 261 via the spline groove 267.

[0055] The rotary driver 265 in this embodiment can be a servo motor. The rotary driver 265 is started, and its working end transmits power to the driving drum 261 through the third transmission belt 266, so that the driving drum 261 starts to rotate. Since the outer wall of the transmission shaft 262 is provided with a spline groove 267 extending along its axis, and the transmission shaft 262 is spline-connected with the driving drum 261 through the spline groove 267, when the driving drum 261 rotates, the engagement of the spline enables the transmission shaft 262 to rotate synchronously with the driving drum 261. Through the spline connection, the function of the transmission shaft 262 being able to both axially move and synchronously rotate in the driving drum 261 is successfully achieved, which meets the actual working requirements of the first drive unit 26 switching to drive the second bevel gears 247 on both sides, making the operation of the device more flexible and reliable.

[0056] In order to achieve the purpose of automatically changing the object driven by the first drive unit 26 while the three-way valve 23 changes the transformer oil flow direction, the following features are specifically set:

[0057] The first driving unit 26 includes a mounting frame 268, and both ends of the transmission shaft 262 are rotatably mounted on the mounting frame 268. A horizontally extending rack 269 is provided at one end of the mounting frame 268 close to the three-way valve 23. A valve core 232 is rotatably mounted in the three-way valve 23, and the rotation axis of the valve core 232 is horizontally arranged perpendicular to the axis of the driving drum 261. A second synchronous wheel 233 coaxially connected to the valve core 232 is provided outside the three-way valve 23. The upper and lower second synchronous wheels 233 are driven by a second transmission belt 234. Connection; a handle 235 is coaxially mounted on the second synchronous wheel 233 located at the top; a gear 236 is coaxially mounted on the second synchronous wheel 233 located at the bottom, and the gear 236 is meshed and connected with the rack 269 on the mounting frame 268. When the valve core 232 of the three-way valve 23 rotates and changes direction, it drives the mounting frame 268 to translate toward the side of the filter tube 22 that is not connected to the oil circuit, so that the third turntable 263 of the transmission shaft 262 facing the side not connected to the oil circuit is in contact with the second turntable 248 below the filter tube 22 that is not connected to the oil circuit.

[0058] In this embodiment, when the flow direction of the transformer oil needs to be changed, the staff manually or electrically rotates the handle 235 of the upper three-way valve 23 to change the input direction of the transformer oil. Since the handle 235 is coaxially installed with the second synchronous wheel 233 located at the top, and the upper and lower second synchronous wheels 233 are connected by the second transmission belt 234, the rotation of the handle 235 will drive the second synchronous wheel 233 to rotate, and then the lower second synchronous wheel 233 will rotate through the second transmission belt 234. The lower second synchronous wheel 233 is coaxially connected with the valve core 232, so the valve core 232 located at the bottom will rotate in the three-way valve 23 with the rotation of the second synchronous wheel 233, changing the flow direction of the transformer oil. The gear 236 coaxially installed on the lower second synchronous wheel 233 will rotate with the second transmission belt 234. Since the gear 236 is meshed and connected with the rack 269 on the mounting frame 268, the rotation of the gear 236 will drive the mounting frame 268 to move horizontally. The mounting frame 268 translates toward the side of the filter tube 22 that is not connected to the oil circuit, so that the transmission shaft 262 is aligned with the third turntable 263 on the side that is not connected to the oil circuit and fits with the second turntable 248 below the filter tube 22 that is not connected to the oil circuit. At this time, the driving object of the first driving unit 26 is switched to the second bevel gear 247 below the filter tube 22 on the side that was originally filtering, thereby driving the main shaft 223 and the first turntable 241 on that side to rotate, thereby cleaning the impurities in the filter tube 22 that is newly connected to the oil circuit.

[0059] In order to ensure stable movement of the mounting frame 268 in the horizontal direction, the following features are specifically provided:

[0060] At least two guide rods 214 parallel to the axis of the driving drum 261 are provided at the bottom of the collecting box 21 , and the mounting frame 268 is sleeved on the guide rods 214 and slides along the guide rods 214 .

[0061] The setting of the guide rod 214 in this embodiment provides a stable guide for the movement of the mounting frame 268, effectively limiting the horizontal freedom of the mounting frame 268 so that it can only move along the direction of the guide rod 214, thereby avoiding shaking or deviation of the mounting frame 268 during movement, and ensuring the stability and reliability of the movement of the mounting frame 268.

[0062] Working principle: Transformer oil flows from the oil circuit system of the transformer body 1 through the main oil pipe 231 into the three-way valve 23, and then enters the filter tube 22 through the oil inlet branch pipe 221 at the top of the filter tube 22. Since the outer part of the filter tube 22 is coaxially provided with an annular adsorption magnet 225, when the oil with impurities such as amorphous fine debris flows through the spiral channel in the filter tube 22, the impurities such as amorphous fine debris will be adsorbed on the inner wall of the filter tube 22 by the annular adsorption magnet 225. Then the transformer oil flows back to the oil circuit system of the transformer body 1 from the oil outlet branch pipe 222 at the bottom of the filter tube 22 through the three-way valve 23 and the main oil pipe 231, completing a filtering cycle. After a period of impurity removal, the staff can manually or electrically drive the three-way valve 23 to change the moving path of the transformer oil, so that the transformer oil enters the filter tube 22 on the other side of the collection box 21. While the filter tube 22 on the other side is adsorbing amorphous fine debris, the first transmission unit 24 drives the spiral blade 224 at the vacant filter tube 22 to rotate, and the impurities adsorbed on the inner wall of the filter tube 22 are moved along the spiral channel to the top of the filter tube 22. When the impurities are transported to the top of the filter tube 22 by the spiral blade 224, the first transmission unit 24 simultaneously drives the piston block 25 to reciprocate horizontally along the radial direction of the main shaft 223 in the transport channel 211. The impurities transported to the top of the filter tube 22 by the spiral blade 224 are pushed into the transport channel 211 of the collection box 21, and the impurities move into the collection box 21 along the inclined transport channel 211, thereby realizing the collection of impurities.

[0063] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. An oil-immersed amorphous alloy transformer, comprising a transformer body and a filter assembly of an oil circuit system connected to the transformer body, characterized in that: The filter assembly includes a collection box, and filter tubes arranged on both sides of the collection box. The top of each filter tube is connected to the delivery channels arranged on both sides of the top of the collection box. The upper end of the filter tube is provided with an oil inlet branch extending radially along the filter tube. The bottom end of the filter tube is connected to the oil outlet branch. The oil inlet branch and the oil outlet branch of the two filter tubes are respectively connected to a three-way valve. The three-way valve is provided with a main oil pipe connected to the oil circuit system of the transformer body. A main shaft is coaxially arranged in the filter tube, and a spiral blade is arranged on the outer wall of the main shaft, and a spiral channel is formed between the spiral blade and the inner wall of the filter tube. An annular adsorption magnet is coaxially arranged outside the filter tube, and the annular adsorption magnet is attached to the outer wall of the filter tube. The bottom end of the main shaft passes through the oil outlet branch pipe and extends to the outside of the oil outlet branch pipe. The filter assembly also includes a first transmission unit arranged outside the filter tube for driving the main shaft and the spiral blade to rotate. The rotation of the spiral blade moves the impurities adsorbed on the inner wall of the filter tube to the top of the filter tube. The top of the main shaft and the spiral blade are flush with the bottom of the conveying channel. A piston block is slidably installed in the conveying channel. The piston block fits the bottom of the conveying channel. The first transmission unit drives the piston block to reciprocate horizontally along the radial direction of the main shaft in the conveying channel. The piston block pushes the impurities conveyed to the top of the filter tube by the spiral blade into the collection box.

2. The oil-immersed amorphous alloy transformer according to claim 1, characterized in that: A filter screen is coaxially arranged at the connection between the oil outlet branch pipe and the filter pipe, and an axial hole for avoiding the main shaft is arranged at the axis of the filter screen.

3. The oil-immersed amorphous alloy transformer according to claim 1, characterized in that: The piston block has the same longitudinal section as the conveying channel. A fitting rubber is arranged at the bottom of the piston block. The fitting rubber fits the inner wall of the conveying channel. The length of the fitting rubber in the radial direction of the filter tube is greater than the outer diameter of the filter tube.

4. The oil-immersed amorphous alloy transformer according to claim 1, characterized in that: An extension plate extending along the length direction of the conveying channel is arranged at one end of the piston block away from the collecting box, the extension plate passes through a guide hole arranged on the conveying channel and extends to the outside of the conveying channel, and an articulated arm is rotatably mounted at one end of the extension plate located outside the conveying channel, and the articulated arm is arranged horizontally; The first transmission unit includes a first turntable rotatably mounted on the outside of the filter tube, the axis of the first turntable is parallel to the axis of the filter tube, a connecting rod is eccentrically arranged on the first turntable, the axis of the connecting rod is parallel to the axis of the first turntable, the connecting rod is rotatably connected to one end of the articulated arm away from the extension plate, and the rotation of the first turntable drives the piston block to reciprocate in the conveying channel.

5. The oil-immersed amorphous alloy transformer according to claim 4, characterized in that: The straight-line distance between the axis of the connecting rod and the axis of the first rotating disk is greater than the radius of the filter tube.

6. The oil-immersed amorphous alloy transformer according to claim 4, characterized in that: A shaft is coaxially arranged at the bottom of the first rotating disk, and first synchronous wheels are installed at the bottom ends of the shaft and the main shaft, and the two first synchronous wheels are connected by a first transmission belt; A first bevel gear is coaxially mounted on the first synchronous wheel at the bottom of the main shaft, and two second bevel gears are rotatably mounted on the bottom of the collecting box. The axes of the two second bevel gears are on the same straight line and perpendicular to the axis of the filter tube. The two second bevel gears are respectively meshed and connected with the first bevel gears on both sides of the collecting box. A first driving unit is arranged at the bottom of the collecting box, and the first driving unit is used for independently driving the second bevel gear on one side to rotate.

7. The oil-immersed amorphous alloy transformer according to claim 6, characterized in that: The first driving unit comprises a driving drum rotatably mounted in a limiting mounting plate arranged at the bottom of the collecting box, the axis of the driving drum and the axis of the second bevel gear are in the same straight line, a transmission shaft is coaxially mounted in the driving drum, third rotating disks are coaxially mounted at both ends of the transmission shaft, and elastic columns are respectively arranged on one side of the two third rotating disks facing the second bevel gear; A second rotating disk is arranged on one side of the second bevel gear facing the third rotating disk, and a slot located on the rotating path of the third rotating disk is arranged on the second rotating disk; The elastic column is located on one side of the axis of the third turntable and keeps the axis parallel to the axis of the third turntable. The transmission shaft moves along the axis of the driving drum to one side of the third turntable to fit the surface of the second turntable. When the elastic column is inserted into the slot, the third turntable rotates synchronously with the second turntable.

8. The oil-immersed amorphous alloy transformer according to claim 7, characterized in that: The first driving unit comprises a rotary driver, the working end of the rotary driver is connected to the driving drum via a third transmission belt; The outer wall of the transmission shaft is provided with a spline groove extending along the axis of the transmission shaft, and the transmission shaft is spline-connected with the driving drum through the spline groove.

9. The oil-immersed amorphous alloy transformer according to claim 7, characterized in that: The first driving unit comprises a mounting frame, on which both ends of the transmission shaft are rotatably mounted, and a horizontally extending rack is provided at one end of the mounting frame close to the three-way valve; A valve core is rotatably installed in the three-way valve, and the rotating axis of the valve core is arranged horizontally and perpendicular to the axis of the driving drum. A second synchronous wheel coaxially connected to the valve core is arranged outside the three-way valve, and the upper and lower second synchronous wheels are connected by a second transmission belt. A handle is coaxially mounted on the second synchronous wheel located above; A gear is coaxially mounted on the second synchronous wheel located below, and the gear is meshed with the rack on the mounting frame. When the valve core of the three-way valve rotates and changes direction, it drives the mounting frame to translate toward the side of the filter tube that is not connected to the oil circuit, so that the third turntable with the transmission shaft facing the side that is not connected to the oil circuit fits with the second turntable under the filter tube that is not connected to the oil circuit.

10. The oil-immersed amorphous alloy transformer according to claim 7, characterized in that: At least two guide rods parallel to the axis of the driving drum are arranged at the bottom of the collecting box, and the mounting frame is sleeved on the guide rods and slides along the guide rods.

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