A 35kV oil-immersed transformer

Abstract

The present invention belongs to the technical field of transformers and provides a 35kV oil-immersed transformer, comprising a transformer body, a grid plate for mounting components fixedly mounted within the transformer body, a conduit connected to the bottom of the transformer body, a filter box connected to one end of the conduit remote from the transformer body, a filter plate fixedly mounted within the filter box, the filter plate being angled with a horizontal plane and located at the discharge end of the conduit, a plurality of sets of heat sinks fixedly mounted within the filter box, the heat sinks extending through the side walls of the filter box, a return oil pump fixedly mounted on the filter box, the return oil pump's oil inlet being connected to the filter box. Compared to the prior art, the present invention has the following beneficial effects: cooling oil first enters the filter box for filtration before being transported by the return oil pump to the transformer body, thereby preventing impurities from entering and accumulating within the return oil pump, thereby preventing the return oil pump from being damaged and impurities from backflowing and remaining within the transformer body.

Description

Technical Field

[0001] The invention belongs to the technical field of transformers, and in particular relates to a 35kV oil-immersed transformer. Background Art

[0002] Oil-immersed transformers use oil as the main insulation means of the transformer and rely on oil as a cooling medium. They are a new type of high-performance transformer with a more reasonable structure and better performance.

[0003] The existing oil-immersed transformer is inconvenient to assemble and disassemble. It is inconvenient to filter the oil when using oil as a cooling medium. The oil will be mixed with impurities during the circulation process. In response to the above technical problems, the Chinese patent with patent publication number CN113488313A uses a second oil pump to extract the cooling oil during use, and transports it to the oil storage barrel for filtration. Then, the cooling oil is circulated. When the cooling oil in the transformer body is extracted, the impurities will first enter the second oil pump. Since the channels and gaps inside the oil pump provide hiding places for impurities, even if some impurities are carried away by the oil flow, some impurities may still adhere to these parts and are difficult to be completely discharged. Over a long period of time, these impurities may affect the normal operation of the oil pump and easily cause damage to the second oil pump. At the same time, some larger impurities will be intercepted and unable to enter the second oil pump, resulting in residues in the transformer body, causing accumulation of impurities in the oil and affecting heat dissipation. Summary of the Invention

[0004] The purpose of the present invention is to provide a 35kV oil-immersed transformer, aiming to solve the technical problems in the prior art that impurities in the cooling oil easily cause equipment damage and the impurities in the transformer cannot be completely cleaned.

[0005] The present invention is achieved as follows: a 35kV oil-immersed transformer includes a transformer body, a grid plate for installing components is fixedly installed in the transformer body, a conduit is connected to the bottom of the transformer body, and the end of the conduit away from the transformer body is connected to a filter box, a filter plate is fixedly installed in the filter box, the filter plate is set at an angle with the horizontal plane and the filter plate is located at the discharge end of the conduit, multiple groups of heat sinks are fixedly installed in the filter box, the heat sinks pass through the side walls of the filter box, and a return oil pump is fixedly installed on the filter box, the oil inlet end of the return oil pump is connected to the filter box, and the oil outlet end of the return oil pump is connected to the transformer body.

[0006] Further technical solution: A through hole is opened at the bottom of the transformer body, and a rotating tube is rotatably installed in the through hole. The end of the rotating tube away from the transformer body is fixedly connected to a connector, the connector is rotatably connected to the conduit, and the end of the rotating tube away from the conduit is located in the through hole.

[0007] Further technical solution: A coaxially arranged rotating shaft is fixedly installed in the rotating tube, the rotating shaft extends into the transformer body and blades located in the transformer body are fixedly installed on the rotating shaft, a rotating power part is fixedly installed at the bottom of the transformer body, a gear is fixedly installed at the output end of the rotating power part, the gear is engaged with a gear ring fixedly installed on the rotating tube, and the gear ring is coaxially arranged with the rotating tube.

[0008] Further technical solution: a protrusion is fixedly installed at the lower end of the filter plate, a slide groove is opened in the protrusion, both ends of the slide groove pass through the side wall of the filter box, the side of the protrusion adjacent to the filter plate is set at an angle to the horizontal plane and a groove connected to the slide groove is opened on the side, and multiple groups of branch pipes are provided in the filter box, which are located below the filter plate and blow air to the filter plate.

[0009] Further technical solution: multiple groups of branch pipes are distributed in sequence along the extension direction of the filter plate, and the branch pipes are connected to multiple groups of spaced-apart blow pipes, which point to the filter plate. The air blown out by the multiple groups of blow pipes at the bottom passes through the filter plate and flows along the side of the protrusion and enters the slide through the groove. The multiple groups of branch pipes are connected to the air supply chamber fixedly installed on the side of the filter box. A fan is fixedly installed on the side of the filter box, the air outlet end of the fan is connected to the air supply chamber, and the air inlet end of the fan is connected to the top of the filter box.

[0010] Further technical solution: a cover is fixedly installed in the filter box, one end of the cover is fixedly connected to the protrusion, and the blowing pipe is distributed in the area covered by the cover.

[0011] Further technical solution: a push block is slidably installed in the chute, the cross section of the push block matches the cross section of the chute, a movable plate is fixedly connected to the push block, and a servo module for driving the movable plate is provided in the filter box.

[0012] Further technical solution: A closed chamber is fixedly installed on both sides of the filter box, the closed chamber is connected to the end of the slide, a blanking trough is opened on the bottom surface of the closed chamber, a closing plate for closing the blanking trough is slidably installed on the side wall of the closed chamber, and an adjusting screw is rotatably installed on the closed chamber to drive the closing plate to move.

[0013] Further technical solution: A collection box is provided on the side of the filter box for use with the blanking chute. A support plate is fixedly installed on the side of the filter box, and a fixing screw pointing to the closed chamber is threadedly installed on the support plate. The collection box contacts the closed chamber under the pressure of the fixing screw and covers the blanking chute.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The cooling oil first enters the filter box for filtration, and then is transported to the transformer body by the return oil pump, which avoids the damage of the return oil pump caused by the accumulation of impurities in the return oil pump, ensures the continuous circulation of the cooling oil, and improves the service life of the equipment. At the same time, the cooling oil carries impurities to the filter box under the action of gravity, avoiding the backflow of impurities and residues in the transformer body, further reducing the content of impurities in the transformer body and improving the cooling effect.

[0016] 2. The rotating shaft drives the blades to rotate and stir the cooling oil in the transformer body, so that the cooling oil in the transformer body forms a vortex. Under the action of centrifugal force, impurities in the cooling oil and at the bottom of the transformer body will converge to the position of the through-hole. Then, the impurities can follow the cooling oil through the through-hole and leave the transformer body, thereby realizing the convergence of impurities in the transformer body, improving the effect of impurities leaving the transformer body, reducing the time that impurities exist in the transformer body, reducing the residual impurities in the transformer body, and further improving the cooling effect of the cooling oil. At the same time, the rotation of the cooling oil can make impurities accumulated on the upper surface of the components inside the transformer body detach from the components and leave the transformer body, further reducing the residual impurities in the transformer body and further improving the cooling effect of the cooling oil.

[0017] 3. When the cooling oil is filtered through the filter plate, air blows towards the filter plate. After the air blows towards the filter plate, the cooling oil is further cooled. At the same time, it can provide an upward force to the impurities carried in the cooling oil, reducing the friction between the impurities and the filter plate, so that the impurities can move more smoothly to the bottom of the filter plate, avoiding impurities remaining on the filter plate, and improving the cleaning effect of impurities on the filter plate. When the impurities move to the position of the convex block, the impurities can be blown away by the action of the air. The impurities move along the inclined surface of the convex block and enter the chute through the groove, thereby avoiding the accumulation of impurities on the filter plate and preventing the impurities from splitting and passing through the filter plate due to the flow of cooling oil on the filter plate, further improving the collection effect of impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic cross-sectional structural diagram of the present invention.

[0020] Figure 3 It is a structural schematic diagram of the rotating tube in the present invention.

[0021] Figure 4 for Figure 2 Schematic diagram of the enlarged A1 region.

[0022] Figure 5 for Figure 2 A magnified schematic diagram of the A2 region in the middle.

[0023] Figure 6 This is a schematic diagram of the first cross-sectional structure of the filter chamber in the present invention.

[0024] Figure 7 This is a second cross-sectional structural schematic diagram of the filter chamber in the present invention.

[0025] Figure 8 It is a schematic cross-sectional structural diagram of the chute in the present invention.

[0026] In the attached figure: 1. Transformer body; 2. Grid plate; 3. Through hole; 4. Rotating tube; 5. Rotating shaft; 6. Blade; 7. Connector; 8. Conduit; 9. Rotating power part; 10. Gear; 11. Ring gear; 12. Filter box; 13. Filter plate; 14. Bump; 15. Cover; 16. Heat sink; 17. Groove; 18. Fan; 19. Branch pipe; 20. Blowing pipe; 21. Air supply chamber; 22. Moving plate; 23. Servo module; 24. Closed chamber; 25. Closed plate; 26. Adjusting screw; 27. Dropping chute; 28. Collecting box; 29. ​​Fixing screw; 30. Support plate; 31. Slide; 32. Pushing block; 33. Oil return pump. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0029] like Figures 1-8 As shown, a 35kV oil-immersed transformer provided by the present invention includes a transformer body 1, a grid plate 2 for installing components is fixedly installed in the transformer body 1, a conduit 8 is connected to the bottom of the transformer body 1, a valve is provided on the conduit 8, and the end of the conduit 8 away from the transformer body 1 is connected to a filter box 12, a filter plate 13 is fixedly installed in the filter box 12, the filter plate 13 is arranged at an angle with the horizontal plane and the filter plate 13 is located at the discharge end of the conduit 8, a plurality of groups of heat sinks 16 are fixedly installed in the filter box 12, the heat sinks 16 pass through the side wall of the filter box 12, and a return oil pump 33 is fixedly installed on the filter box 12, the oil inlet end of the return oil pump 33 is connected to the filter box 12, and the oil outlet end of the return oil pump 33 is connected to the transformer body 1.

[0030] In actual application of this embodiment, the transformer body 1 is installed in a set position through the mounting member at the bottom thereof. When in use, the cooling oil in the transformer body 1 enters the conduit 8 under the action of gravity and then enters the filter box 12 along the conduit 8. The cooling oil in the conduit 8 flows downward to the filter plate 13 and is filtered by the filter plate 13. Since the filter plate 13 is an inclined structure, the cooling oil will move along the filter plate 13 and descend through the filter plate 13. When the cooling oil flows along the filter plate 13, the impurities on the filter plate 13 can be moved to the bottom of the filter plate 13. In addition, the impact of the cooling oil falling on the filter plate 13 increases the force for the impurities to move downward, so that the impurities on the filter plate 13 can move faster and more completely to the lower side of the filter plate 13, thereby reducing the probability of the filter plate 13 being blocked by impurities and preventing the impurities from being located below the falling oil. The cooling oil is continuously impacted to prevent impurities from splitting and penetrating the filter plate 13, thereby improving the filtering effect of the filter plate 13. The filtered cooling oil falls to the bottom of the filter box 12, and the oil is further cooled by the heat sink 16. The filtered cooling oil is transported to the transformer main body 1 on the left and right sides of the return oil pump 33, thereby realizing the circulation of the cooling oil. The cooling oil first enters the filter box 12 for filtration, and then is transported to the transformer main body 1 by the return oil pump 33, thereby preventing impurities from entering the return oil pump 33 and accumulating therein, thereby preventing the return oil pump 33 from being damaged. The continuous circulation of the cooling oil is ensured, and the service life of the equipment is improved. At the same time, the cooling oil carries impurities to the filter box 12 under the action of gravity, thereby preventing impurities from flowing back and remaining in the transformer main body 1, further reducing the content of impurities in the transformer main body 1, and improving the cooling effect.

[0031] like Figure 1-Figure 3 、 Figure 5 As shown, a 35kV oil-immersed transformer provided by the present invention has a through hole 3 provided at the bottom of the transformer body 1, and a rotating tube 4 is rotatably installed in the through hole 3. The end of the rotating tube 4 away from the transformer body 1 is fixedly connected to a connector 7, and the connector 7 is rotatably connected to the conduit 8. The end of the rotating tube 4 away from the conduit 8 is located in the through hole 3.

[0032] Specifically, a coaxially arranged rotating shaft 5 is fixedly installed in the rotating tube 4, the rotating shaft 5 extends into the transformer body 1 and a blade 6 located in the transformer body 1 is fixedly installed on the rotating shaft 5, a rotating power part 9 is fixedly installed at the bottom of the transformer body 1, and a gear 10 is fixedly installed at the output end of the rotating power part 9, the gear 10 is engaged with a ring gear 11 fixedly installed on the rotating tube 4, and the ring gear 11 is coaxially arranged with the rotating tube 4.

[0033] In actual application of this embodiment, the rotating power part 9 drives the rotating tube 4 and the rotating shaft 5 to rotate through the meshing gear 10 and the ring gear 11, and the rotating shaft 5 drives the blades 6 to rotate to stir the cooling oil in the transformer main body 1, so that the cooling oil in the transformer main body 1 forms a vortex. Under the action of centrifugal force, impurities in the cooling oil and at the bottom of the transformer main body 1 will converge to the position of the through hole 3, and then the impurities can follow the cooling oil through the through hole 3 to leave the transformer main body 1, thereby realizing the convergence of impurities in the transformer main body 1, improving the effect of impurities leaving the transformer main body 1, reducing the time that impurities exist in the transformer main body 1, reducing the residual impurities in the transformer main body 1, and further improving the cooling effect of the cooling oil. At the same time, the rotation of the cooling oil can make the impurities accumulated on the upper surface of the components inside the transformer main body 1 detach from the components and leave the transformer main body 1, further reducing the residual impurities in the transformer main body 1, and further improving the cooling effect of the cooling oil.

[0034] In one embodiment of the present invention, the rotating power component 9 is a motor, and of course it can also be other components capable of outputting rotating power, such as a hydraulic motor, which drives the rotating tube 4 and the rotating shaft 5 to rotate.

[0035] like Figure 2 、 Figure 4 、 Figure 5-Figure 7 As shown, a 35kV oil-immersed transformer provided by the present invention has a protrusion 14 fixedly mounted on the lower end of the filter plate 13, a chute 31 is provided in the protrusion 14, both ends of the chute 31 pass through the side wall of the filter box 12, and the side of the protrusion 14 adjacent to the filter plate 13 is set at an angle to the horizontal plane and a groove 17 connected to the chute 31 is provided on the side. A plurality of branches 19 are provided in the filter box 12, which are located below the filter plate 13 and blow air toward the filter plate 13.

[0036] Specifically, multiple groups of branch pipes 19 are distributed in sequence along the extension direction of the filter plate 13, and the branch pipes 19 are connected to multiple groups of spaced-apart blowing pipes 20, which point to the filter plate 13. The air blown out by the lowermost multiple groups of blowing pipes 20 passes through the filter plate 13 and flows along the side of the protrusion 14 and enters the slide 31 through the groove 17. The multiple groups of branch pipes 19 are connected to the air supply chamber 21 fixedly installed on the side of the filter box 12. A fan 18 is fixedly installed on the side of the filter box 12, and the air outlet end of the fan 18 is connected to the air supply chamber 21, and the air inlet end of the fan 18 is connected to the top of the filter box 12.

[0037] Specifically, a cover 15 is fixedly installed in the filter box 12 , one end of the cover 15 is fixedly connected to the protrusion 14 , and the blowing pipe 20 is distributed in the area covered by the cover 15 .

[0038] In actual application of this embodiment, when the cooling oil is filtered through the filter plate 13, the air in the upper part of the filter box 12 is extracted by the fan 18 and transported to the air supply chamber 21. Then the air is blown to the filter plate 13 from the blowing pipe 20 through the branch pipe 19. The diameter of the blowing pipe 20 on the bottom group of branch pipes 19 is smaller than that of other groups, and the air flow speed is faster. The air blown out from the upper blowing pipe 20 is blown to the filter plate 13 to further cool the cooling oil. At the same time, it can provide an upward force on the impurities carried in the cooling oil, reduce the friction between the impurities and the filter plate 13, and allow the impurities to be more It moves smoothly to the bottom of the filter plate 13, preventing impurities from remaining on the filter plate 13, thereby improving the cleaning effect of impurities on the filter plate 13. When the impurities move to the position of the protrusion 14, since the diameter of the blowing pipe 20 on the lower group of branch pipes 19 is smaller than that of other groups, the air flow speed is faster. At this time, the impurities can be blown away by the action of the air. The impurities move along the inclined surface of the protrusion 14 and enter the chute 31 through the groove 17, thereby preventing impurities from accumulating on the filter plate 13 and preventing impurities from splitting and passing through the filter plate 13 due to the flow of cooling oil on the filter plate 13, thereby further improving the collection effect of impurities.

[0039] like Figure 6-Figure 8 As shown, a 35kV oil-immersed transformer provided by the present invention has a pusher block 32 slidably installed in the chute 31. The cross-section of the pusher block 32 matches the cross-section of the chute 31. A movable plate 22 is fixedly connected to the pusher block 32. A servo module 23 for driving the movable plate 22 is provided in the filter box 12.

[0040] Specifically, closed chambers 24 are fixedly installed on both sides of the filter box 12, and the closed chambers 24 are connected to the ends of the slide grooves 31. A blanking trough 27 is provided on the bottom surface of the closed chamber 24, and a closing plate 25 for closing the blanking trough 27 is slidably installed on the side wall of the closed chamber 24. An adjusting screw 26 is rotatably installed on the closed chamber 24 to drive the closing plate 25 to move.

[0041] Specifically, a collection box 28 is provided on the side of the filter box 12 for use with the blanking chute 27. A support plate 30 is fixedly installed on the side of the filter box 12. A fixing screw 29 pointing to the closed chamber 24 is threadedly installed on the support plate 30. The collection box 28 contacts the closed chamber 24 and covers the blanking chute 27 under the pressure of the fixing screw 29.

[0042] When the filter box 12 is in operation, the filter element 32 is moved to the left of the filter element 32 and the filter element 32 is moved to the right of the filter element 32. When the filter box 12 is in operation, the filter element 32 is moved to the left of the filter element 32 and the filter element 32 is moved to the right of the filter element 32. When the filter box 12 is in operation, the filter element 32 is moved to the right of the filter element 32 and the filter element 32 is moved to the right of the filter element 32. The pushing block 32 is moved to the end of the collecting box 28 where the collecting box 28 is located to close the chute 31, and the adjusting screw 26 is turned to drive the closing plate 25 to move so that the closing plate 25 closes the blanking chute 27. Then, the fixing screw 29 is turned to release the fixing of the collecting box 28 and the collecting box 28 can be removed for cleaning. After the cleaning is completed, it can be installed again. The impurities in the chute 31 are pushed by the pushing block 32 to move and close the end of the chute 31. Then, the blanking chute 27 is closed again by the closing plate 25, so that the collecting box 28 is disconnected from the filter box 12 when cleaning the impurities in the collecting box 28, thereby preventing impurities from entering the filter box 12, ensuring the cleanliness of the cooling oil and the cooling effect of the cooling oil.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0044] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A 35kV oil-immersed transformer, comprising a transformer body (1), wherein a grid plate (2) for mounting components is fixedly installed in the transformer body (1), characterized in that: The bottom of the transformer body (1) is connected to a conduit (8), and one end of the conduit (8) away from the transformer body (1) is connected to a filter box (12). A filter plate (13) is fixedly installed in the filter box (12), and the filter plate (13) is set at an angle with the horizontal plane and is located at the discharge end of the conduit (8). A plurality of groups of heat sinks (16) are fixedly installed in the filter box (12), and the heat sinks (16) pass through the side wall of the filter box (12). A return oil pump (33) is fixedly installed on the filter box (12), and the oil inlet end of the return oil pump (33) is connected to the filter box (12), and the oil outlet end of the return oil pump (33) is connected to the transformer body (1); A through hole (3) is provided at the bottom of the transformer body (1), a rotating tube (4) is rotatably mounted in the through hole (3), an end of the rotating tube (4) away from the transformer body (1) is fixedly connected to a connector (7), the connector (7) is rotatably connected to a conduit (8), and an end of the rotating tube (4) away from the conduit (8) is located in the through hole (3); A coaxially arranged rotating shaft (5) is fixedly installed in the rotating tube (4), the rotating shaft (5) extends into the transformer body (1) and a blade (6) located in the transformer body (1) is fixedly installed on the rotating shaft (5), a rotating power member (9) is fixedly installed at the bottom of the transformer body (1), a gear (10) is fixedly installed at the output end of the rotating power member (9), the gear (10) meshes with a gear ring (11) fixedly installed on the rotating tube (4), and the gear ring (11) and the rotating tube (4) are coaxially arranged.

2. A 35kV oil-immersed transformer according to claim 1, characterized in that: A protrusion (14) is fixedly mounted on the lower end of the filter plate (13), a chute (31) is provided in the protrusion (14), both ends of the chute (31) pass through the side wall of the filter box (12), a side surface of the protrusion (14) adjacent to the filter plate (13) is provided with an angle with the horizontal plane, and a groove (17) is provided on the side surface connected to the chute (31), and a plurality of branches (19) are provided in the filter box (12) and are located below the filter plate (13) and blow air toward the filter plate (13).

3. A 35kV oil-immersed transformer according to claim 2, characterized in that: The plurality of branch pipes (19) are sequentially distributed along the extension direction of the filter plate (13), and the branch pipes (19) are connected to a plurality of intervally distributed blowing pipes (20), and the blowing pipes (20) point to the filter plate (13). The air blown out by the plurality of blowing pipes (20) at the bottom passes through the filter plate (13), flows along the side of the protrusion (14), and enters the chute (31) through the groove (17). The plurality of branch pipes (19) are connected to the air supply chamber (21) fixedly installed on the side of the filter box (12). A fan (18) is fixedly installed on the side of the filter box (12), and the air outlet end of the fan (18) is connected to the air supply chamber (21), and the air inlet end of the fan (18) is connected to the top of the filter box (12).

4. A 35kV oil-immersed transformer according to claim 3, characterized in that: A cover (15) is fixedly installed in the filter box (12), one end of the cover (15) is fixedly connected to the protrusion (14), and the blowing pipe (20) is distributed in the area covered by the cover (15).

5. The 35kV oil-immersed transformer according to claim 2, characterized in that: A pusher block (32) is slidably mounted in the chute (31), and the cross section of the pusher block (32) matches the cross section of the chute (31). A movable plate (22) is fixedly connected to the pusher block (32), and a servo module (23) for driving the movable plate (22) to move is provided in the filter box (12).

6. A 35kV oil-immersed transformer according to claim 5, characterized in that: A closed chamber (24) is fixedly installed on both sides of the filter box (12), and the closed chamber (24) is connected to the end of the slide groove (31). A blanking trough (27) is provided on the bottom surface of the closed chamber (24). A closing plate (25) for closing the blanking trough (27) is slidably installed on the side wall of the closed chamber (24), and an adjusting screw (26) for driving the closing plate (25) to move is rotatably installed on the closed chamber (24).

7. The 35kV oil-immersed transformer according to claim 6, characterized in that: A collecting box (28) for use with the blanking chute (27) is provided on the side of the filter box (12). A support plate (30) is fixedly mounted on the side of the filter box (12). A fixing screw (29) pointing to the closed chamber (24) is threadedly mounted on the support plate (30). Under the pressure of the fixing screw (29), the collecting box (28) contacts the closed chamber (24) and covers the blanking chute (27).

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