35kV oil-immersed transformer

Abstract

The invention belongs to the technical field of transformers, and provides a 35kV oil-immersed transformer which comprises a transformer body, a grating plate used for installing components is fixedly installed in the transformer body, the bottom of the transformer body is communicated with a guide pipe, the end, away from the transformer body, of the guide pipe is communicated with a filter box, and a filter plate is fixedly installed in the filter box. An included angle is formed between the filter plate and the horizontal plane, the filter plate is located at the discharging end of the guide pipe, multiple sets of cooling fins are fixedly installed in the filter box and penetrate through the side wall of the filter box, an oil return pump is fixedly installed on the filter box, and the oil inlet end of the oil return pump is connected with the filter box. Compared with the prior art, the transformer has the beneficial effects that cooling oil firstly enters the filter box to be filtered and then is conveyed into the transformer main body by the oil scavenger pump, so that the oil scavenger pump is prevented from being damaged due to the fact that impurities enter the oil scavenger pump to be accumulated, and meanwhile, the impurities are prevented from flowing back and remaining in the transformer main body.

Description

Technical Field

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

[0002] An oil-immersed transformer uses oil as the main insulation means of the transformer and relies on oil as the cooling medium. It is a new type of high-performance transformer with a more reasonable structure and better performance.

[0003] The existing oil-immersed transformers are inconvenient to assemble and disassemble. During the process of using oil as the cooling medium, it is inconvenient to filter the oil. The oil will be doped with impurities during the process of circulating use. For the above technical problems, the Chinese patent with the patent publication number CN113488313A, when in use, pumps out the cooling oil through the second oil pump, transports it to the oil storage barrel for filtration, and then circulates the cooling oil. When the cooling oil in the transformer body is pumped out, impurities will first enter the second oil pump. Since the channels and gaps inside the oil pump and other parts will provide hiding places for the impurities, even if some impurities are carried away by the oil flow, there are still some impurities that may adhere to these parts and are difficult to be completely discharged. Over 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 also be intercepted and cannot enter the second oil pump, resulting in residues in the transformer body, causing the 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 35 kV oil-immersed transformer, aiming to solve the technical problems in the prior art that impurities in the cooling oil easily cause equipment damage and cannot completely clean the impurities in the transformer.

[0005] The present invention is realized as follows: A 35 kV oil-immersed transformer includes a transformer body. A grille plate for installing components is fixedly installed inside the transformer body. One end of a conduit communicates with the bottom of the transformer body, and the other end of the conduit away from the transformer body communicates with a filter box. A filter plate is fixedly installed inside the filter box. The filter plate is arranged at an angle with the horizontal plane and is located at the discharge end of the conduit. A plurality of heat sinks are fixedly installed inside the filter box, and the heat sinks penetrate through the side wall of the filter box. 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] Preferably, a through hole is opened at the bottom of the transformer body. A rotating pipe is rotatably installed inside the through hole. One end of the rotating pipe away from the transformer body is fixedly connected to a connection head, and the connection head is rotatably connected to the conduit. The end of the rotating pipe away from the conduit is located inside the through hole.

[0007] Preferably, a coaxial arrangement of a rotating shaft is fixedly installed inside the rotating tube. The rotating shaft extends into the transformer body, and blades located inside the transformer body are fixedly installed on the rotating shaft. A rotating power component is fixedly installed at the bottom of the transformer body. The output end of the rotating power component is fixedly installed with a gear, and the gear meshes with a toothed ring fixedly installed on the rotating tube. The toothed ring is coaxially arranged with the rotating tube.

[0008] Preferably, a convex block is fixedly installed at the lower end of the filter plate. A chute is formed inside the convex block. Both ends of the chute penetrate through the side wall of the filter box. The side surface of the convex block adjacent to the filter plate is arranged at an angle with the horizontal plane, and a groove communicating with the chute is formed on this side surface. A plurality of groups of branch pipes are arranged below the filter plate inside the filter box and blow air towards the filter plate.

[0009] Preferably, a plurality of groups of the branch pipes are sequentially distributed along the extension direction of the filter plate. A plurality of groups of blow pipes are connected to the branch pipes at intervals. The blow pipes point to the filter plate. The air blown out by the lowest plurality of groups of blow pipes passes through the filter plate and then flows along the side surface of the convex block and enters the chute through the groove. A plurality of groups of branch pipes are communicated with a air supply chamber fixedly installed on the side surface of the filter box. A blower is fixedly installed on the side surface of the filter box. The air outlet end of the blower is connected to the air supply chamber, and the air inlet end of the blower is communicated with the top of the filter box.

[0010] Preferably, a cover is fixedly installed inside the filter box. One end of the cover is fixedly connected to the convex block, and the blow pipes are distributed within the area covered by the cover.

[0011] Preferably, a pushing block is slidably installed inside the chute. The cross section of the pushing block fits the cross section of the chute. A moving plate is fixedly connected to the pushing block. A servo module for driving the moving plate to move is arranged inside the filter box.

[0012] Preferably, closed chambers are fixedly installed on both sides of the filter box. The closed chambers are connected to the ends of the chute. A material dropping groove is formed on the bottom surface of the closed chamber. A closing plate for closing the material dropping groove is slidably installed on the side wall of the closed chamber. An adjusting screw for driving the closing plate to move is rotatably installed on the closed chamber.

[0013] Preferably, a collection box for cooperating with the material dropping groove is arranged on the side surface of the filter box. A support plate is fixedly installed on the side surface of the filter box. 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 material dropping groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The cooling oil first enters the filter box for filtration and then is transported to the transformer main body by the oil return pump, avoiding damage to the oil return pump caused by the accumulation of impurities in the oil return pump, ensuring the continuous circulation of the cooling oil, extending the service life of the equipment. At the same time, under the action of gravity, the cooling oil carries impurities and flows into the filter box, preventing the backflow of impurities and their remaining in the transformer main body, further reducing the content of impurities in the transformer main body and improving the cooling effect.

[0015] 2. The rotating shaft drives the blades to rotate, agitating the cooling oil in the transformer main body, causing the cooling oil in the transformer main body to form a vortex. Under the action of centrifugal force, the impurities in the cooling oil and at the bottom of the transformer main body will converge towards the position of the through hole. Then, the impurities can leave the transformer main body along with the cooling oil through the through hole, realizing the convergence of impurities in the transformer main body, improving the effect of impurities leaving the transformer main body, reducing the time of impurities existing in the transformer main body, reducing the residue of impurities in the transformer main body, 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 internal components in the transformer main body break away from the components and leave the transformer main body, further reducing the residue of impurities in the transformer main body and further improving the cooling effect of the cooling oil.

[0016] 3. When the cooling oil passes through the filter plate for filtration, air blows towards the filter plate. After blowing towards the filter plate, the air further cools the cooling oil. 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, enabling the impurities to move more smoothly to the bottom of the filter plate, preventing the impurities from remaining on the filter plate, and improving the cleaning effect of the impurities on the filter plate. When the impurities move to the position of the convex block, they can be blown by the air to move. The impurities move along the inclined surface of the convex block and enter the chute through the groove, thus preventing the impurities from accumulating on the filter plate and avoiding the splitting of impurities through the filter plate caused by the flow of cooling oil on the filter plate, further improving the collection effect of the impurities. Brief Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a schematic cross-sectional structure diagram of the present invention.

[0019] Figure 3 It is a schematic structure diagram of the rotating pipe in the present invention.

[0020] Figure 4 It is Figure 2 an enlarged schematic diagram of area A1 in

[0021] Figure 5 It is Figure 2 an enlarged schematic diagram of area A2 in

[0022] Figure 6 This is the first sectional structure schematic diagram of the filtration chamber in the present invention.

[0023] Figure 7 This is the second sectional structure schematic diagram of the filtration chamber in the present invention.

[0024] Figure 8 This is the sectional structure schematic diagram of the sliding groove in the present invention.

[0025] In the attached drawings: 1. Transformer main body; 2. Grille plate; 3. Through hole; 4. Rotating pipe; 5. Rotating shaft; 6. Blade; 7. Connector; 8. Duct; 9. Rotating power component; 10. Gear; 11. Ring gear; 12. Filter box; 13. Filter plate; 14. Protrusion; 15. Cover; 16. Heat sink; 17. Groove; 18. Fan; 19. Branch pipe; 20. Air blowing pipe; 21. Air supply chamber; 22. Moving plate; 23. Servo module; 24. Sealed chamber; 25. Sealing plate; 26. Adjusting screw; 27. Feeding chute; 28. Collection box; 29. Fixing screw; 30. Support plate; 31. Sliding groove; 32. Pushing block; 33. Oil return pump. Detailed implementation manners

[0026] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the attached drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0028] As Figures 1-8 shown, a 35 kV oil-immersed transformer provided by the present invention includes a transformer main body 1, a grille plate 2 for installing components is fixedly installed in the transformer main body 1, a duct 8 is connected to the bottom of the transformer main body 1, a valve is arranged on the duct 8, one end of the duct 8 far from the transformer main 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 duct 8, multiple groups of heat sinks 16 are fixedly installed in the filter box 12, the heat sinks 16 penetrate through the side wall of the filter box 12, an oil return pump 33 is fixedly installed on the filter box 12, the oil inlet end of the oil return pump 33 is connected to the filter box 12, and the oil outlet end of the oil return pump 33 is connected to the transformer main body 1.

[0029] In actual application of this embodiment, the transformer main body 1 is installed at a set position through the installation components at its bottom. When in use, the cooling oil in the transformer main body 1 enters the conduit 8 under the action of gravity and then flows along the conduit 8 into the filter box 12. The cooling oil in the conduit 8 flows downward to the filter plate 13, and the filter plate 13 filters the cooling oil. Since the filter plate 13 is of 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, it can make the impurities on the filter plate 13 move downward to the lower side of the filter plate 13. Coupled with the impact of the cooling oil falling onto the filter plate 13, the acting force for the impurities to move downward is increased, so that the impurities on the filter plate 13 can move to the lower side of the filter plate 13 faster and more completely, thereby reducing the probability of the filter plate 13 being blocked by impurities, and avoiding the situation that the impurities are located below the falling oil and continuously being impacted, preventing the impurities from splitting and passing through the filter plate 13, and improving the filtering effect of the filter plate 13. The filtered cooling oil falls to the bottom of the filter box 12, and the heat dissipation fins 16 are used to further cool the oil. The filtered cooling oil is conveyed into the transformer main body 1 under the action of the oil return pump 33, thereby realizing the circulating flow of the cooling oil. The cooling oil first enters the filter box 12 for filtering and then is conveyed into the transformer main body 1 by the oil return pump 33, avoiding the damage of the oil return pump 33 caused by the accumulation of impurities in the oil return pump 33, ensuring the continuous circulating flow of the cooling oil, increasing the service life of the equipment. At the same time, the cooling oil carries impurities and flows into the filter box 12 under the action of gravity, avoiding the backflow of impurities and the remaining of impurities in the transformer main body 1, further reducing the content of impurities in the transformer main body 1 and improving the cooling effect.

[0030] As Figures 1-3 , Figure 5 shown, a 35 kV oil-immersed transformer provided by the present invention is shown. A through hole 3 is opened at the bottom of the transformer main body 1. A rotating pipe 4 is rotatably installed in the through hole 3. One end of the rotating pipe 4 far from the transformer main body 1 is fixedly connected with a connector 7, and the connector 7 is rotatably connected with the conduit 8. One end of the rotating pipe 4 far from the conduit 8 is located in the through hole 3.

[0031] Specifically, a coaxial arrangement rotating shaft 5 is fixedly installed in the rotating pipe 4. The rotating shaft 5 extends into the transformer main body 1 and a blade 6 located in the transformer main body 1 is fixedly installed on the rotating shaft 5. A rotating power member 9 is fixedly installed at the bottom of the transformer main body 1. The output end of the rotating power member 9 is fixedly installed with a gear 10, and the gear 10 meshes with a gear ring 11 fixedly installed on the rotating pipe 4. The gear ring 11 is coaxially arranged with the rotating pipe 4.

[0032] In actual application of this embodiment, the rotational power member 9 drives the rotating pipe 4 and the rotating shaft 5 to rotate through the meshing gears 10 and the gear ring 11. 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, the impurities in the cooling oil and at the bottom of the transformer main body 1 will converge towards the position of the through hole 3. Then, the impurities can follow the cooling oil to leave the transformer main body 1 through the through hole 3, realizing the convergence of impurities in the transformer main body 1, improving the effect of the impurities leaving the transformer main body 1, reducing the time for the impurities to exist in the transformer main body 1, reducing the residue of impurities in the transformer main body 1, 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 surfaces of the internal components in the transformer main body 1 break away from the components and leave the transformer main body 1, further reducing the residue of impurities in the transformer main body 1 and further improving the cooling effect of the cooling oil.

[0033] In an example of the present invention, the rotational power member 9 is a motor. Of course, it can also be other components such as a hydraulic motor that can output rotational power, and the motor drives the rotating pipe 4 and the rotating shaft 5 to rotate.

[0034] Such as Figure 2 、 Figure 4 、 Figures 5-7 As shown in

[0035] 、

[0036] a 35 kV oil-immersed transformer provided by the present invention, a convex block 14 is fixedly installed at the lower end of the filter plate 13. A chute 31 is opened in the convex block 14. Both ends of the chute 31 penetrate through the side wall of the filter box 12. The side surface of the convex block 14 adjacent to the filter plate 13 is provided with an included angle with the horizontal plane and a groove 17 communicating with the chute 31 is opened on this side surface. A plurality of groups of branch pipes 19 located below the filter plate 13 and blowing air towards the filter plate 13 are arranged in the filter box 12.

[0037] 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 blower 18 and conveyed into the air supply chamber 21. Then, the air blows from the blowing pipe 20 through the branch pipe 19 onto the filter plate 13. The diameter of the blowing pipe 20 on the lowermost group of branch pipes 19 is smaller than that of other groups, and the air flow velocity is relatively fast. The air blown out from the upper blowing pipes 20 cools the cooling oil further after blowing onto the filter plate 13, and at the same time can provide an upward acting force on the impurities carried in the cooling oil, reducing the frictional force between the impurities and the filter plate 13, so that the impurities can move more smoothly to the bottom of the filter plate 13, avoiding the residues of impurities on the filter plate 13 and improving the cleaning effect of the impurities on the filter plate 13. When the impurities move to the position of the convex block 14, due to the smaller diameter of the blowing pipe 20 on the lowermost group of branch pipes 19 and the relatively fast air flow velocity, the impurities can be blown to move under the action of the air at this time. The impurities move along the inclined surface of the convex block 14 and enter the chute 31 through the groove 17, thus avoiding the accumulation of impurities on the filter plate 13 and the splitting of impurities through the filter plate 13 caused by the flow of the cooling oil on the filter plate 13, and further improving the collection effect of the impurities.

[0038] As Figures 6-8 shown, a 35 kV oil-immersed transformer provided by the present invention is shown. A pushing block 32 is slidably installed in the chute 31. The cross-section of the pushing block 32 matches the cross-section of the chute 31. A moving plate 22 is fixedly connected to the pushing block 32. A servo module 23 for driving the moving plate 22 to move is arranged in the filter box 12.

[0039] Specifically, closed chambers 24 are fixedly installed on both sides of the filter box 12. The closed chambers 24 are connected to the ends of the chute 31. A blanking groove 27 is formed in the bottom surface of the closed chamber 24. A closing plate 25 for closing the blanking groove 27 is slidably installed on the side wall of the closed chamber 24. An adjusting screw 26 for driving the closing plate 25 to move is rotatably installed on the closed chamber 24.

[0040] Specifically, a collection box 28 cooperating with the blanking groove 27 is arranged on the side of the filter box 12. 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 groove 27 under the pressure of the fixing screw 29.

[0041] In actual application of this embodiment, the servo module 23 drives the pusher block 32 to move to the other end through the moving plate 22. When the pusher block 32 moves, it pushes the impurities in front of it and finally pushes the impurities into the closed chamber 24. At this time, the pusher block 32 cooperates with the side wall of the filter box 12 to close the end of the chute 31. After the impurities enter the closed chamber 24, they fall into the collection box 28 under the action of gravity. After a set time, the servo module 23 drives the pusher block 32 to move in the reverse direction to the other end of the chute 31, and pushes the impurities accumulated in the chute 31 into the closed chamber 24 at the other end again, realizing the cleaning of the impurities in the chute 31. When the collection box 28 needs to be cleaned, move the pusher block 32 to the end where the collection box 28 is located to close the chute 31, rotate the adjusting screw 26 to drive the closing plate 25 to move so that the closing plate 25 closes the material dropping groove 27, and then rotate the fixing screw 29 to release the fixation of the collection box 28, and then the collection box 28 can be removed for cleaning. After cleaning, it can be installed again. By pushing the impurities in the chute 31 with the pusher block 32 and closing the end of the chute 31, and then closing the material dropping groove 27 with the closing plate 25 again, the connection between the collection box 28 and the filter box 12 is disconnected when cleaning the impurities in the collection box 28, preventing impurities from entering the filter box 12, ensuring the cleanliness of the cooling oil and the cooling effect of the cooling oil.

[0042] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0043] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A 35 kV 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 arranged at an angle with a 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) penetrate the side wall of the filter box (12). An oil return pump (33) is fixedly installed on the filter box (12), and an oil inlet end of the oil return pump (33) is connected to the filter box (12), and an oil outlet end of the oil return pump (33) is connected to the transformer body (1).

2. A 35kV oil-immersed transformer according to claim 1, characterized in that: 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 the conduit (8), and an end of the rotating tube (4) away from the conduit (8) is located in the through hole (3).

3. A 35kV oil-immersed transformer according to claim 2, characterized in that: A coaxially arranged rotating shaft (5) is fixedly mounted 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 mounted on the rotating shaft (5), a rotating power member (9) is fixedly mounted at the bottom of the transformer body (1), a gear (10) is fixedly mounted at the output end of the rotating power member (9), the gear (10) meshes with a gear ring (11) fixedly mounted on the rotating tube (4), and the gear ring (11) is coaxially arranged with the rotating tube (4).

4. 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 slide groove (31) is provided in the protrusion (14), both ends of the slide groove (31) penetrate 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 a horizontal plane, and a groove (17) is provided on the side surface and is connected to the slide groove (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).

5. A 35kV oil-immersed transformer according to claim 4, characterized in that: A plurality of groups of branch pipes (19) are sequentially distributed along the extension direction of the filter plate (13); the branch pipes (19) are connected to a plurality of groups of blow pipes (20) distributed at intervals; the blow pipes (20) point to the filter plate (13); air blown out by the plurality of groups of blow pipes (20) at the bottom passes through the filter plate (13), flows along the side of the protrusion (14), and enters the slide groove (31) through the groove (17); the plurality of groups of branch pipes (19) are connected to an air supply chamber (21) fixedly mounted on the side of the filter box (12); a fan (18) is fixedly mounted on the side of the filter box (12); an air outlet end of the fan (18) is connected to the air supply chamber (21), and an air inlet end of the fan (18) is connected to the top of the filter box (12).

6. A 35kV oil-immersed transformer according to claim 5, 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).

7. A 35kV oil-immersed transformer according to claim 4, characterized in that: A push block (32) is slidably mounted in the slide groove (31), the cross section of the push block (32) matches the cross section of the slide groove (31), a moving plate (22) is fixedly connected to the push block (32), and a servo module (23) is provided in the filter box (12) for driving the moving plate (22) to move.

8. A 35kV oil-immersed transformer according to claim 7, characterized in that: A closed chamber (24) is fixedly mounted on both sides of the filter box (12), the closed chamber (24) is connected to the end of the slide groove (31), a material drop groove (27) is provided on the bottom surface of the closed chamber (24), a closed plate (25) for closing the material drop groove (27) is slidably mounted on the side wall of the closed chamber (24), and an adjusting screw (26) for driving the closed plate (25) to move is rotatably mounted on the closed chamber (24).

9. A 35kV oil-immersed transformer according to claim 8, characterized in that: A collecting box (28) for use with the material drop chute (27) is arranged 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 toward the closed chamber (24) is threadedly mounted on the support plate (30); and the collecting box (28) contacts the closed chamber (24) and covers the material drop chute (27) under the pressure of the fixing screw (29).

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