Oil filling port cleaning device for oil-immersed transformer

Abstract

The invention discloses an oil filling port cleaning device for an oil-immersed transformer, and belongs to the field of oil-immersed transformers. A mounting plate is fixedly connected to the bottom of the annular frame, a sliding groove A is formed in the upper end of the mounting plate, a sliding block is slidably connected into the sliding groove A, a connecting rod is hinged to the upper end of the sliding block, a circular block is hinged to the other end of the connecting rod, and a hydraulic bin A and a hydraulic bin B are fixedly connected to the upper end of the annular frame. Through hydraulic linkage (the hydraulic bin A, the hydraulic bin B and the communicating pipe), single-air-cylinder-driven double actions are achieved, the sliding block drives the positioning block to clamp the outer wall of the oil filling pipe in a self-adaptive mode, the ejector rod pushes the movable plate to expand, the sealing ring is attached to the inner wall of the oil filling pipe, manual intervention is reduced, the operation time is shortened, sealing performance is reliable, impurities are prevented from entering a transformer oil system, and the service life of the transformer oil system is prolonged. Meanwhile, the sealing ring is convenient to clean.

Description

Technical Field

[0001] This application relates to the field of oil-immersed transformers, and more specifically, to a device for cleaning the oil inlet of an oil-immersed transformer. Background Technology

[0002] Oil-immersed transformers are a new type of high-performance transformer with a more rational structure and superior performance. Their three-dimensional wound core, with its three core columns arranged in an equilateral triangle, has no air gaps in its magnetic circuit, resulting in tighter winding. The three magnetic circuits are of equal and shortest lengths, and the cross-sectional area of ​​the core columns is closer to a circle. Therefore, performance is further improved, losses are reduced, noise is reduced, three-phase balance is achieved, and the third harmonic component is reduced. This product is more suitable for power grid upgrades in urban and rural areas and industrial and mining enterprises, and is also more suitable for combined transformers and prefabricated substation transformers.

[0003] For example, Chinese Patent Publication No. CN216818044U discloses the following technical solution: an oil-immersed transformer oil inlet cleaning device, including a device rod, a rotating ring provided on the side wall of the device rod, the rotating ring being connected to the device rod via a sliding device, two device plates fixedly connected to the lower end of the rotating ring, a cleaning device being provided through one end of each of the two device plates, a device cavity being provided through the device rod, a threaded seat being fixedly connected to the inner wall of the device cavity, a triggering device being threadedly connected to the threaded seat, an opening being provided through the lower end of the device rod, an air bladder being provided at the opening, and a base plate being fixedly connected to the lower end of the air bladder.

[0004] The existing technology has the following problems: When the air bladder of the above-mentioned device expands downward, it can tightly adhere to the inner wall of the oil filling port to prevent external debris and dirt from entering. The air bladder can also play a role in assisting positioning. However, when the rotating plate drives the threaded rod to rotate and squeeze the air bladder below, the entire device is not fixed or limited. Therefore, the operation is not stable at this time. At the same time, after the air bladder adheres to the inner wall of the oil filling port, it will inevitably be covered with oil. When the air bladder resets, it will return to the inner side of the fixing ring, making it difficult to clean. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an oil filling port cleaning device for oil-immersed transformers, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, this application provides an oil filling port cleaning device for an oil-immersed transformer, comprising: an annular frame; a mounting plate fixedly connected to the bottom of the annular frame, a groove A being provided at the upper end of the mounting plate, a slider being slidably connected inside the groove A, a connecting rod being hinged to the upper end of the slider, and a circular block being hinged to the other end of the connecting rod; hydraulic chambers A and B being fixedly connected to the upper end of the annular frame, a hydraulic rod A being slidably connected to one end of the hydraulic chamber A via a piston, and the upper end of the hydraulic rod A being fixedly connected to the circular block; a hydraulic rod B being slidably connected to the inside of the hydraulic chamber B via a piston, and a top rod being fixedly connected to the lower end of the hydraulic rod B; a rectangular frame being fixedly connected to the bottom of the mounting plate, a rotating shaft being rotatably connected to the inner wall of the rectangular frame, a movable plate being fixedly connected to the outer wall of the rotating shaft via a connecting block, and a sealing ring being movably fitted onto the outer wall of the movable plate; a moving plate being fixedly connected to the bottom of the slider, a telescopic rod being fixedly connected to the inner side of the moving plate, and a positioning block being fixedly connected to the other end of the telescopic rod.

[0007] Preferably, a connecting pipe is provided between the hydraulic chamber A and the hydraulic chamber B.

[0008] Preferably, a spring A is fixedly connected to the inner wall of the rectangular frame, and the other end of the spring A is fixedly connected to the movable plate.

[0009] Preferably, the outer wall of the rectangular frame is equipped with an adjustment and cleaning assembly, and the inner side of the movable plate is equipped with a spraying assembly.

[0010] Preferably, the adjustment and cleaning assembly includes a mounting block and a lifting frame. The lifting frame is fixedly connected to the outer wall of the ring frame, and the mounting block is fixedly connected to the outer wall of the lifting frame. A ratchet and a toothed ring are rotatably connected to the upper end of the mounting block. A pawl is hinged to the inner side of the toothed ring. A connecting shaft is fixedly connected to the upper end of the ratchet. A pulley A is fixedly sleeved on the outer wall of the connecting shaft. A transmission belt is wound around the outer wall of the pulley A. A transmission wheel B is driven to the inner side of the other end of the transmission belt. A reciprocating screw is fixedly sleeved in the middle of the transmission wheel B. A limit frame is slidably connected to the outer side of the bottom end of the lifting frame. An arc-shaped plate is fixedly connected to the bottom of the limit frame. A toothed ring is engaged on the side of the toothed ring. A connecting rod is fixedly connected to the bottom of the toothed ring. A cleaning plate is assembled at the bottom of the connecting rod.

[0011] Preferably, the lifting frame is threaded to the outer wall of the reciprocating lead screw, and the gear ring is slidably connected to the bottom of the annular frame.

[0012] Preferably, the spraying assembly includes a receiving frame, which is fixedly connected to the inner side of the movable plate. A liquid bladder is provided inside the receiving frame, and a delivery pipe is installed at the outlet of the liquid bladder. A spray pipe is installed at the outlet of the delivery pipe. A pressure plate is slidably connected inside the receiving frame, and a squeezing rod is fixedly connected to the outer wall of the pressure plate.

[0013] Preferably, a liquid storage tank is fixedly connected to the outer wall of the movable plate, and a liquid replenishment pipe is installed at the bottom outlet of the liquid storage tank. The bottom of the liquid replenishment pipe is connected to the liquid inlet of the liquid bladder.

[0014] Preferably, the end of the extrusion rod away from the pressure plate is located at the rear end of the positioning block.

[0015] Preferably, a one-way valve is provided at the connection between the replenishment tube and the liquid bladder.

[0016] The advantages of this application are: (1) This application achieves single-cylinder-driven dual action through hydraulic linkage (hydraulic chamber A, hydraulic chamber B, connecting pipe). The slider drives the positioning block to adaptively clamp the outer wall of the oil injection pipe, and the push rod pushes the movable plate to expand, so that the sealing ring fits the inner wall of the oil injection pipe, reducing manual intervention, shortening the operation time, and ensuring reliable sealing to prevent impurities from entering the transformer oil system. At the same time, the design of the sealing ring is easy to clean.

[0017] (2) This application separates the functions of height adjustment and rotation cleaning by setting adjustment and cleaning components. On the one hand, it can drive the reciprocating screw to adjust the height of the lifting frame (to adapt to different lengths of oil injection pipes), and on the other hand, it can drive the toothed ring to drive the cleaning plate to rotate and scrape off the sludge.

[0018] (3) By setting up a spraying component, this application can spray the treatment agent onto the outer wall of the liquid during the positioning process of the oil injection pipe, thereby improving the subsequent cleaning effect. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a top view of the structure of the present invention; Figure 3 This is a partial cross-sectional structural schematic diagram of the present invention; Figure 4 This is the invention Figure 1 Enlarged structural diagram at point A in the middle; Figure 5 This is a partial three-dimensional structural diagram of the present invention. Figure 1 ; Figure 6 This is the invention Figure 6 Enlarged structural diagram at point B; Figure 7 This is a partial three-dimensional structural diagram of the present invention. Figure 2 .

[0020] In the above image, 1. Ring frame; 21. Mounting plate; 22. Slide rail A; 23. Slider; 24. Connecting rod; 25. Circular block; 26. Hydraulic chamber A; 27. Hydraulic chamber B; 28. Connecting pipe; 29. ​​Hydraulic rod B; 210. Rectangular frame; 211. Rotating shaft; 212. Movable plate; 213. Sealing ring; 214. Top rod; 215. Spring A; 216. Moving plate; 217. Telescopic rod; 218. Positioning block; 3. Cleaning assembly; 31. Mounting block; 32. Ratchet 33. Gear ring; 34. Pawl; 35. Connecting shaft; 36. Pulley A; 37. Drive belt; 38. Drive wheel B; 39. Reciprocating screw; 310. Arc plate; 311. Limiting frame; 312. Gear ring; 313. Connecting rod; 314. Cleaning plate; 315. Lifting frame; 4. Spraying assembly; 41. Receiving frame; 42. Liquid bladder; 43. Delivery pipe; 44. Pressure plate; 45. Extrusion rod; 46. Spray pipe; 47. Liquid storage tank; 48. Liquid replenishment pipe. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort should fall within the scope of protection of the present application.

[0022] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate for the purposes of describing embodiments of this application herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0023] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0024] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0025] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] Example 1, please refer to Figures 1-7This embodiment provides an oil filling port cleaning device for an oil-immersed transformer, comprising: a ring frame 1; a mounting plate 21 is fixedly connected to the bottom of the ring frame 1, a groove A22 is provided at the upper end of the mounting plate 21, a slider 23 is slidably connected inside the groove A22, a connecting rod 24 is hinged to the upper end of the slider 23, and a circular block 25 is hinged to the other end of the connecting rod 24; a hydraulic chamber A26 and a hydraulic chamber B27 are fixedly connected to the upper end of the ring frame 1; a hydraulic rod A is slidably connected to one end of the hydraulic chamber A26 via a piston, and the upper end of the hydraulic rod A is fixedly connected to the circular block 25; a hydraulic rod B29 is slidably connected inside the hydraulic chamber B27 via a piston; and a hydraulic cylinder is installed inside the hydraulic chamber B27. A top rod 214 is fixedly connected to the lower end of the pressure rod B29. A rectangular frame 210 is fixedly connected to the bottom of the mounting plate 21. A rotating shaft 211 is rotatably connected to the inner wall of the rectangular frame 210. A movable plate 212 is fixedly connected to the outer wall of the rotating shaft 211 via a connecting block. A sealing ring 213 is movably fitted onto the outer wall of the movable plate 212. The tight contact between the sealing ring 213 and the inner wall of the oil injection pipe prevents impurities from falling into the oil system, ensuring the cleanliness and stability of the cleaning process. A moving plate 216 is fixedly connected to the bottom of the slider 23. A telescopic rod 217 is fixedly connected to the inner side of the moving plate 216. A positioning block 218 is fixedly connected to the other end of the telescopic rod 217. A connecting pipe 28 is provided between the hydraulic chambers A26 and B27. The piston movement of the hydraulic chamber A26 transmits hydraulic oil to the hydraulic chamber B27 through the connecting pipe 28, realizing the linkage of the two actions. A spring A215 is fixedly connected to the inner wall of the rectangular frame 210. The other end of the spring A215 is fixedly connected to the movable plate 212. The spring A215 acts as a return spring for the movable plate 212, automatically retracting the sealing ring 213 when the top rod 214 rises, thus preventing the sealing ring 213 from being deformed by long-term pressure and extending its service life. An adjustment and cleaning assembly 3 is installed on the outer wall of the rectangular frame 210, and a liquid spraying assembly 4 is installed on the inner side of the movable plate 216.

[0028] In use, the arc-shaped plate 310 is first placed on the upper end of the transformer's oil conservator. Then, the piston at one end of the hydraulic chamber A26 is pushed inward by the external cylinder. The piston at the other end of the hydraulic chamber A26, connected to the hydraulic rod A, will then move the hydraulic rod A outward, thereby causing the circular block 25 to rise. One end of the connecting rod 24, hinged to the circular block 25, will also move upward. The other end of the connecting rod 24 will pull the slider 23 inside the slide groove A22 towards the center of the annular frame 1. The moving plate 216 at the bottom of the slider 23 will also move accordingly. This will cause the positioning block 218 to move towards the oil injection pipe via the telescopic rod 217 until it is in contact with the outer wall of the oil injection pipe. At this point, the telescopic rod 217 will contract under pressure. Therefore, after the positioning block 218 is positioned, the moving plate 216 can squeeze the telescopic rod 217 and move towards the positioning block 218. When the positioning block 218... After the cleaning plate 314 on the upper side of the 8 contacts the oil injection pipe, the telescopic rod 217 also retracts to its minimum state. At this time, the cylinder continues to push the piston inside the hydraulic chamber A26, and the hydraulic oil inside the hydraulic chamber A26 will enter the interior of the hydraulic chamber B27 through the connecting pipe 28. Since only one end of the hydraulic chamber B27 is open, when the hydraulic oil enters the interior of the hydraulic chamber B27, the hydraulic rod B29, which is slidably connected to the piston inside the hydraulic chamber B27, will move downward, thereby driving the push rod 214 at its bottom to move downward. Since the gap between the movable plates 212 on both sides of the push rod 214 is narrower at the bottom than at the top, when the push rod 214 moves downward, it will push the movable plate 212 to rotate to the side through the rotating shaft 211. This allows the sealing ring 213 sleeved on the outside of the movable plate 212 to expand and fit against the inner wall of the oil injection pipe, thereby ensuring the stability when cleaning the oil injection pipe and oil injection port, and also preventing impurities from falling off during the cleaning process.

[0029] Example 2, please refer to Figures 1-7 Based on Embodiment 1, the adjustment and cleaning assembly 3 includes a mounting block 31 and a lifting frame 315. The lifting frame 315 is fixedly connected to the outer wall of the ring frame 1, and the mounting block 31 is fixedly connected to the outer wall of the lifting frame 315. A ratchet 32 ​​and a toothed ring 33 are rotatably connected to the upper end of the mounting block 31. A pawl 34 is hinged to the inner side of the toothed ring 33 to separate the height adjustment and rotation cleaning actions. A connecting shaft 35 is fixedly connected to the upper end of the ratchet 32, and a pulley A3 is fixedly sleeved on the outer wall of the connecting shaft 35. 6. A transmission belt 37 is wound around the outer wall of the pulley A36. A transmission wheel B38 is connected to the inner side of the other end of the transmission belt 37. A reciprocating screw 39 is fixedly sleeved in the middle of the transmission wheel B38. A limit frame 311 is slidably connected to the bottom of the lifting frame 315. An arc plate 310 is fixedly connected to the bottom of the limit frame 311. A toothed ring 312 is engaged on the side of the toothed ring 33. A connecting rod 313 is fixedly connected to the bottom of the toothed ring 312. A cleaning plate 314 is assembled at the bottom of the connecting rod 313.

[0030] The lifting frame 315 is threadedly connected to the outer wall of the reciprocating screw 39, and the gear ring 312 is slidably connected to the bottom of the ring frame 1. In use, the motor connected to the bottom of the mounting block 31 is started, causing its output end to drive the ratchet 32 ​​to rotate. When the ratchet 32 ​​rotates clockwise, it does not drive the gear ring 33 to rotate. Instead, the ratchet 32 ​​drives the upper connecting shaft 35 to rotate, causing the pulley A36 on the outer wall of the connecting shaft 35 to rotate accordingly. This, in turn, under the transmission action of the transmission belt 37, drives the transmission wheel B38 to rotate. The transmission wheel B38 then drives the reciprocating screw 39 to rotate, thereby causing the bottom of the lifting frame 315 threadedly connected to its outer wall to rotate. The part will slide inside the limit frame 311, thereby adjusting the height of the lifting frame 315 and the ring frame 1 to meet the cleaning needs of oil injection pipes of different lengths. Then, the fixing of the connecting shaft 35 and the ratchet 32 ​​is released, and the motor drives the ratchet 32 ​​to rotate counterclockwise. At this time, the ratchet 32 ​​can cooperate with the pawl 34 to make the toothed ring 33 rotate, which can drive the toothed ring 312 that meshes with it to rotate. Then, the toothed ring 312 will drive the cleaning plate 314 to rotate through the connecting rod 313, thereby cleaning the outer wall of the oil injection pipe.

[0031] Example 3, please refer to Figures 1-7 Based on Embodiment 1, the spraying assembly 4 includes a receiving frame 41, which is fixedly connected to the inner side of the moving plate 216. A liquid bladder 42 is disposed inside the receiving frame 41. A delivery pipe 43 is fitted to the outlet of the liquid bladder 42, and a spray pipe 46 is fitted to the outlet of the delivery pipe 43. A pressure plate 44 is slidably connected inside the receiving frame 41, and a squeezing rod 45 is fixedly connected to the outer wall of the pressure plate 44. A liquid storage tank 47 is fixedly connected to the outer wall of the moving plate 216. A replenishment pipe 48 is fitted to the bottom outlet of the liquid storage tank 47, and the bottom of the replenishment pipe 48 communicates with the inlet of the liquid bladder 42. The end of the squeezing rod 45 away from the pressure plate 44 is located at the rear end of the positioning block 218. A one-way valve is provided at the connection between the replenishment pipe 48 and the liquid bladder 42.

[0032] In use, when the positioning block 218 contacts the outer wall of the oil injection pipe, the moving plate 216 moves towards the positioning block 218. The squeezing rod 45 on the back of the positioning block 218 pushes the pressure plate 44 into the housing frame 41. The pressure plate 44 then squeezes the liquid bladder 42. When the liquid bladder 42 is squeezed, due to the one-way valve at the inlet of the liquid bladder 42, the liquid in the liquid bladder 42 will not flow back into the replenishment pipe 48. The processing liquid in the liquid bladder 42 will be transported to the spray pipe 46 through the delivery pipe 43 and sprayed onto the outer wall of the injection pipe through the spray pipe 46, thus avoiding cleaning it. When the pressure plate 44 is reset, the liquid bladder 42 will be reset under the action of elasticity. At the same time, the cleaning fluid inside the storage tank 47 will be replenished into the liquid bladder 42 through the replenishment pipe 48.

[0033] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A cleaning device for the oil filling port of an oil-immersed transformer, characterized in that, include: Ring frame; A mounting plate is fixedly connected to the bottom of the ring frame. A groove A is formed at the upper end of the mounting plate. A slider is slidably connected inside the groove A. A connecting rod is hinged to the upper end of the slider. A circular block is hinged to the other end of the connecting rod. Hydraulic chambers A and B are fixedly connected to the upper end of the ring frame. A hydraulic rod A is slidably connected to one end of hydraulic chamber A via a piston, and the upper end of hydraulic rod A is fixedly connected to the circular block. A hydraulic rod B is slidably connected to the inside of hydraulic chamber B via a piston. A top rod is fixedly connected to the lower end of hydraulic rod B. A rectangular frame is fixedly connected to the bottom of the mounting plate. A rotating shaft is rotatably connected to the inner wall of the rectangular frame. A movable plate is fixedly connected to the outer wall of the rotating shaft via a connecting block. A sealing ring is movably fitted onto the outer wall of the movable plate. A moving plate is fixedly connected to the bottom of the slider. A telescopic rod is fixedly connected to the inner side of the moving plate. A positioning block is fixedly connected to the other end of the telescopic rod.

2. The oil inlet cleaning device for an oil-immersed transformer according to claim 1, characterized in that, A connecting pipe is provided between hydraulic chamber A and hydraulic chamber B.

3. The oil inlet cleaning device for an oil-immersed transformer according to claim 1, characterized in that, A spring A is fixedly connected to the inner wall of the rectangular frame, and the other end of the spring A is fixedly connected to the movable plate.

4. The oil inlet cleaning device for an oil-immersed transformer according to claim 1, characterized in that, The outer wall of the rectangular frame is equipped with adjustment and cleaning components, and the inner side of the movable plate is equipped with a liquid spraying component.

5. The oil inlet cleaning device for an oil-immersed transformer according to claim 4, characterized in that, The adjustment and cleaning assembly includes a mounting block and a lifting frame. The lifting frame is fixedly connected to the outer wall of the ring frame, and the mounting block is fixedly connected to the outer wall of the lifting frame. A ratchet and a toothed ring are rotatably connected to the upper end of the mounting block. A pawl is hinged to the inner side of the toothed ring. A connecting shaft is fixedly connected to the upper end of the ratchet. A pulley A is fixedly sleeved on the outer wall of the connecting shaft. A transmission belt is wound around the outer wall of the pulley A. A transmission wheel B is driven to the inner side of the other end of the transmission belt. A reciprocating screw is fixedly sleeved in the middle of the transmission wheel B. A limit frame is slidably connected to the outer side of the bottom end of the lifting frame. An arc-shaped plate is fixedly connected to the bottom of the limit frame. A toothed ring is engaged on the side of the toothed ring. A connecting rod is fixedly connected to the bottom of the toothed ring. A cleaning plate is assembled at the bottom of the connecting rod.

6. The oil inlet cleaning device for an oil-immersed transformer according to claim 5, characterized in that, The lifting frame is threaded to the outer wall of the reciprocating lead screw, and the gear ring is slidably connected to the bottom of the ring frame.

7. The oil inlet cleaning device for an oil-immersed transformer according to claim 6, characterized in that, The spraying assembly includes a receiving frame, which is fixedly connected to the inner side of the moving plate. A liquid bladder is provided inside the receiving frame. A delivery pipe is installed at the outlet of the liquid bladder. A spray pipe is installed at the outlet of the delivery pipe. A pressure plate is slidably connected inside the receiving frame. A squeezing rod is fixedly connected to the outer wall of the pressure plate.

8. The oil inlet cleaning device for an oil-immersed transformer according to claim 7, characterized in that, A liquid storage tank is fixedly connected to the outer wall of the movable plate. A replenishment pipe is installed at the bottom outlet of the liquid storage tank, and the bottom of the replenishment pipe is connected to the inlet of the liquid bladder.

9. The oil inlet cleaning device for an oil-immersed transformer according to claim 8, characterized in that, The end of the compression rod away from the pressure plate is located at the rear end of the positioning block.

10. A cleaning device for the oil filling port of an oil-immersed transformer according to claim 9, characterized in that, A one-way valve is provided at the connection between the replenishment tube and the liquid bladder.

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