Oil-immersed transformer convenient for maintenance

Abstract

The utility model discloses a kind of oil-immersed transformers convenient for overhauling, belong to power equipment technical field, to solve the problem of existing technology fin replacement cumbersome time-consuming and internal overhaul inconvenient. Transformer includes body, oil tank and fin, fixed mechanism and opening and closing mechanism are provided. The fixed mechanism includes fixed block, rotating button, long shaft, slot column, cylinder, connecting strip and semicircular plate;Through the rotating single rotating button, slot column can be linked to drive cylinder using its oblique groove, and then through connecting strip and semicircular plate realize the quick synchronous clamping and release of fin. The opening and closing mechanism is arranged in the oil tank, including closing plate, blocking plate and transmission assembly composed of gear tooth plate and connecting rod. The utility model simplifies fin replacement process through fixed mechanism, realizes the convenient internal overhaul through opening and closing mechanism, significantly improves maintenance efficiency, shortens downtime, and is easy to operate.

Description

Technical Field

[0001] This utility model relates to the field of oil-immersed power transformer technology, and in particular to an oil-immersed transformer that is easy to maintain. Background Technology

[0002] Oil-immersed transformers are indispensable core equipment in power systems. They use heat sinks to cool the transformer oil, ensuring safe and stable operation. As a critical component directly exposed to the external environment, the heat sink's heat dissipation efficiency directly affects the transformer's service life and performance.

[0003] In existing technologies, heat sinks are typically connected to the transformer tank via a flange interface, and are circumferentially secured with numerous bolts. This multi-bolt fixing method ensures a tight and airtight connection, effectively preventing transformer oil leakage, and is therefore widely used in various transformer products.

[0004] However, since oil-immersed transformers often operate in harsh outdoor environments for extended periods, their heat sinks are susceptible to erosion from rainwater, air salt, and dust accumulation, leading to problems such as rust, corrosion, or blockage of heat dissipation channels. Regular maintenance or replacement is necessary. During replacement work, the drawbacks of traditional bolt-fixing methods become apparent, requiring maintenance personnel to use specialized tools to individually remove or tighten numerous bolts.

[0005] This disassembly and assembly process is not only cumbersome and labor-intensive, but also extremely time-consuming. Especially under on-site maintenance conditions, the limited working space and complex environment further increase the difficulty of operation, significantly extending the replacement cycle of the entire heat sink. Excessive equipment downtime directly affects the reliability of the power grid, increases potential economic losses, and results in low transformer maintenance efficiency.

[0006] Therefore, this utility model proposes an oil-immersed transformer that is easy to maintain in order to overcome the shortcomings of the prior art. Utility Model Content

[0007] In view of the problems in the prior art, where the heat sink of an oil-immersed transformer is fixed by a large number of bolts, resulting in a cumbersome disassembly and assembly process, excessive time consumption, and low maintenance efficiency during replacement, this utility model aims to provide an oil-immersed transformer with an improved structure that can effectively solve the above problems and is easy to maintain.

[0008] This utility model provides an oil-immersed transformer that is easy to maintain, including: a transformer body, an oil tank and heat sinks; and a fixing mechanism for quickly fixing or releasing the heat sinks.

[0009] The fixing mechanism includes a fixing block, a rotary button, a long shaft, a groove column, a cylinder, a connecting strip, and a semi-circular plate.

[0010] Furthermore, the fixed block slides along the body of the device, and a rotary button is rotatably connected to the fixed block; the long shaft is rotatably installed inside the fixed block, one end of the long shaft is coaxially connected to the rotary button, and the other end is fixedly connected to a groove column; the outer wall of the groove column is provided with an oblique groove, and multiple cylinders are slidably arranged in the oblique groove. Each cylinder is fixedly connected to a semi-circular plate through a connecting strip. The oblique groove drives the cylinder to generate radial displacement, and then the connecting strip pulls or pushes the semi-circular plate to achieve synchronous clamping or release of the heat sink.

[0011] Preferably, the semi-circular plate is used to abut against or detach from the heat sink. By turning the rotary button, the groove column is driven to rotate synchronously via the long shaft. The inside of the oil tank is also equipped with an opening and closing mechanism for opening the internal maintenance passage. The opening and closing mechanism includes a plate fixed to the inner wall of the oil tank and a baffle plate that can move up and down relative to the plate to open or close the maintenance passage.

[0012] Preferably, the opening and closing mechanism further includes a transmission assembly for driving the baffle plate to rise and fall, the transmission assembly including a rotating shaft, a gear fixedly connected to the rotating shaft, and a toothed plate meshing with the gear.

[0013] Preferably, the toothed plate is rotatably connected to one end of the long plate via a connecting shaft; the other end of the long plate is rotatably connected to one end of the connecting plate; and the other end of the connecting plate is fixedly connected to the right side of the baffle plate.

[0014] Preferably, the opening and closing mechanism further includes a protective component for housing and protecting the transmission components. The protective component includes a housing covering the gear and shaft portion, and a base plate for supporting the rotation of the shaft.

[0015] Preferably, the fixed block has a sliding column inside, and the long axis rotates through the sliding column; the fixing mechanism also includes a guard plate fixed to the outside of the fixed block, which is used to guide the movement trajectory of the semicircular plate when it contracts or opens.

[0016] Preferably, an oil level gauge for observing the amount of insulating oil inside is also fixedly connected to the outer wall of the oil tank.

[0017] Preferably, the oil tank is also connected to an oil pipe for inputting or discharging insulating oil.

[0018] This utility model has the following beneficial effects: 1. This utility model solves the problem in the prior art that heat sinks are usually fixed with multiple bolts, which leads to cumbersome disassembly and assembly steps, a lot of time consumption and inconvenience during replacement. It achieves the technical effect of quickly and synchronously clamping and releasing the entire heat sink by operating a single button, which greatly simplifies the replacement process, shortens equipment downtime for maintenance, and improves maintenance efficiency.

[0019] 2. This utility model solves the problem of existing oil-immersed transformers having a closed internal structure, lacking convenient maintenance channels when cleaning or replacing parts, and being difficult to maintain and complex to operate, by adding an opening and closing mechanism consisting of a gear plate and connecting rod assembly inside the oil tank. It achieves the technical effect of being able to drive the internal baffle plate to rise and fall smoothly to form a standardized maintenance entrance, making deep cleaning of the transformer interior and replacement of parts convenient and quick, and effectively ensuring the long-term stable operation of the equipment. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the oil-immersed transformer that is easy to maintain according to this utility model. Figure 2 This is a schematic diagram of the toothed plate of the oil-immersed transformer that is easy to maintain, as proposed in this utility model. Figure 3 This is a schematic diagram of the composite plate structure of the oil-immersed transformer that is easy to maintain, as proposed in this utility model. Figure 4 This is a schematic diagram of the slot column structure of the oil-immersed transformer proposed in this utility model, which is easy to maintain.

[0021] Legend: 1. Equipment body; 2. Oil level gauge; 3. Opening and closing mechanism; 31. Clamping plate; 32. Baffle plate; 33. Connecting plate; 34. Long plate; 35. Connecting shaft; 36. Gear plate; 37. Gear; 38. Rotating shaft; 39. Protective components; 391. Housing; 392. Base plate; 4. Fixing mechanism; 41. Fixing block; 42. Long shaft; 43. Rotary button; 44. Sliding column; 45. Grooved column; 46. Cylindrical column; 47. Connecting strip; 48. Semicircular plate; 49. Guard plate; 5. Heat sink; 6. Oil pipe; 7. Oil tank. Detailed Implementation

[0022] Example: Reference Figures 1 to 4This utility model provides an oil-immersed transformer that is easy to maintain, which aims to solve the technical problems of cumbersome and time-consuming replacement and disassembly of heat dissipation devices and lack of convenient maintenance channels in the prior art.

[0023] like Figure 1 As shown, the oil-immersed transformer for easy maintenance includes a transformer body 1 and an oil tank 7 covering the outside of the transformer body 1. Heat sinks 5 are detachably installed on the outer wall of the oil tank 7. An oil pipe 6 for inputting or discharging insulating oil is also connected to the oil tank 7. An oil level gauge 2 for observing the internal insulating oil level is also fixedly connected to the outer wall of the oil tank 7. The core of this invention lies in the provision of a fixing mechanism 4 for quickly fixing or releasing the heat sinks 5, and an opening and closing mechanism 3 for opening the internal maintenance passage inside the oil tank 7. (Refer to...) Figure 1 and Figure 4 The fixing mechanism 4 is described in detail below. The fixing mechanism 4 includes a fixing block 41 that slides along the body 1. A rotary button 43 is rotatably connected to the fixing block 41. A sliding column 44 is slidably connected inside the fixing block 41. A long shaft 42 rotatably passes through the sliding column 44. One end of the long shaft 42 is coaxially connected to the rotary button 43. The operator can drive the long shaft 42 to rotate synchronously by rotating the rotary button 43. The other end of the long shaft 42 is fixedly connected to a grooved column 45. An oblique groove is formed on the outer wall of the grooved column 45, and multiple cylinders 46 are slidably disposed within it. Within the inclined groove, each cylinder 46 is fixedly connected to a semi-circular plate 48 via a connecting strip 47. Since the cylinder 46 is confined within the inclined groove of the slot column 45, the rotation of the slot column 45 will force the cylinder 46 to produce radial displacement, which in turn pulls or pushes the semi-circular plate 48 through the connecting strip 47 to achieve synchronous clamping or releasing of the heat sink 5. The fixing mechanism 4 also includes a protective plate 49 fixed to the outside of the fixing block 41. The protective plate 49 is used to guide the movement trajectory of the semi-circular plate 48 when it retracts or opens, ensuring its smooth operation.

[0024] Reference Figure 1 , Figure 2 and Figure 3The semi-circular plate 48 is used to abut against or detach from the heat sink 5. Its working process is as follows: when the rotary button 43 is turned, the slot column 45 is driven to rotate synchronously via the long shaft 42. The opening and closing mechanism 3 includes a hinge plate 31 fixed to the inner wall of the oil tank 7, and a baffle plate 32 that can move up and down relative to the hinge plate 31 to open or close the maintenance passage. In order to drive the baffle plate 32 to move up and down, the opening and closing mechanism 3 also includes a transmission assembly. The transmission assembly has a rotating shaft 38, a gear 37 is fixedly connected to the rotating shaft 38, and a toothed plate 36 is provided in a meshing transmission manner with the gear 37. The rotation of the rotating shaft 38 can be accurately converted into the horizontal displacement of the toothed plate 36 through the meshing action of the gear 37 and the toothed plate 36. The transmission assembly is described in terms of its precise position and fixing method with the oil tank 7, for example: it is installed in a designated position inside the oil tank 7 by its protective component 39. Its function is to explain its direct physical function, for example: to provide a precise and stable drive source for the up and down movement of the baffle plate 32.

[0025] Meanwhile, in order to effectively transmit the horizontal displacement of the toothed plate 36 to the baffle plate 32, a linkage mechanism is provided between the toothed plate 36 and the baffle plate 32. The linkage mechanism includes a connecting shaft 35, a long plate 34, and a connecting plate 33. Specifically, the toothed plate 36 is rotatably connected to one end of the long plate 34 through the connecting shaft 35, and the other end of the long plate 34 is rotatably connected to one end of the connecting plate 33. The other end of the connecting plate 33 is firmly fixed to the right side of the baffle plate 32. In the assembled state, when the toothed plate 36 undergoes horizontal displacement, it will push the connecting shaft 35, thereby causing the long plate 34 to swing around its connection point with the connecting plate 33, and finally drive the connecting plate 33 to carry the baffle plate 32 to complete a smooth lifting and lowering motion.

[0026] As a preferred embodiment, refer to Figure 2 and Figure 3 The opening and closing mechanism 3 also includes a protective component 39 for housing and protecting the transmission components; the protective component 39 includes a housing 391 and a base plate 392. The housing 391 covers the outside of the gear 37 and the rotating shaft 38 to prevent external impurities from affecting their meshing transmission, while the base plate 392 is used to support the rotation of the rotating shaft 38 and provide it with a stable mounting reference.

[0027] As another preferred embodiment, refer to Figure 4 The fixed block 41 is internally slidably connected to a sliding column 44, and the long shaft 42 is rotatably inserted through the sliding column 44. This structure allows the long shaft 42 to obtain better support and coaxiality when rotating. At the same time, the fixing mechanism 4 also includes a guard plate 49 fixed to the outside of the fixed block 41. When the semicircular plate 48 retracts or opens, the guard plate 49 can guide its movement trajectory, prevent it from deflecting or getting stuck, and ensure smooth clamping and releasing actions.

[0028] The working principle is as follows: When it is necessary to replace the external heat sink 5, the operator turns the rotation button 43 on the outside of the fixing mechanism 4. The rotation button 43 drives the slot column 45 to rotate synchronously through the long shaft 42. Since the cylinder 46 is slidably confined in the inclined groove on the outer wall of the slot column 45, the rotation of the slot column 45 will force multiple cylinders 46 to contract or open radially along the guide trajectory of the groove. This radial movement is transmitted to the semi-circular plate 48 through the connecting bar 47, pulling all the semi-circular plates 48 to retract inward synchronously, thereby instantly releasing the clamping and fixing of the heat sink 5. At this time, the fixing block 41, together with the retracted semi-circular plate 48, can be slid away along the body 1 to easily remove the damaged heat sink 5. When installing a new heat sink 5, the rotation button 43 is operated in reverse, and the semi-circular plate 48 opens synchronously and clamps the new heat sink 5. The whole process realizes the rapid fixing and release of the heat sink 5 through a single operating component, solving the problem of cumbersome and time-consuming disassembly and assembly of the traditional multi-bolt fixing method.

[0029] When cleaning or maintenance is required inside the transformer, after draining the insulating oil from the oil tank 7, the drive source of the opening and closing mechanism 3 is activated, driving the rotating shaft 38 to rotate. The rotating shaft 38 drives the gear 37 to rotate, and drives the meshing toothed plate 36 to produce a horizontal displacement. The toothed plate 36 pushes the long plate 34 through the connecting shaft 35, and through the linkage of the connecting plate 33, the horizontal movement is converted into the vertical lifting and lowering movement of the baffle plate 32, so that the baffle plate 32 descends smoothly into the closing plate 31. This action opens the maintenance passage inside the transformer, providing a convenient entrance for operators to perform internal cleaning and component replacement, and solving the problem of inconvenient internal maintenance of existing transformers.

Claims

1. An oil-immersed transformer that is easy to maintain, comprising a transformer body (1), an oil tank (7) covering the outside of the transformer body (1), and heat sinks (5) detachably mounted on the oil tank (7); characterized in that, The transformer also includes a fixing mechanism (4) for quickly fixing or releasing the heat sink (5); the fixing mechanism (4) includes a fixing block (41) that slides along the body (1), and a rotating button (43) is rotatably connected to the fixing block (41); a long shaft (42) is rotatably installed inside the fixing block (41), one end of the long shaft (42) is coaxially connected to the rotating button (43), and the other end is fixedly connected to a slotted column (45); an oblique groove is provided on the outer wall of the slotted column (45); a plurality of cylinders (46) are slidably disposed in the oblique groove, each cylinder (46) is fixedly connected to a semi-circular plate (48) through a connecting strip (47), and the cylinder (46) is driven to generate radial displacement through the oblique groove, thereby pulling or pushing the semi-circular plate (48) through the connecting strip (47) to realize the synchronous clamping or release of the heat sink (5).

2. The oil-immersed transformer for easy maintenance according to claim 1, characterized in that, The semicircular plate (48) is used to abut against or detach from the heat sink (5). When the rotary button (43) is turned, the groove column (45) is driven to rotate synchronously via the long shaft (42). The oil tank (7) is also provided with an opening and closing mechanism (3) for opening the internal maintenance channel. The opening and closing mechanism (3) includes a hinge plate (31) fixed to the inner wall of the oil tank (7) and a baffle plate (32) that can move up and down relative to the hinge plate (31) to open or close the maintenance channel.

3. The oil-immersed transformer for easy maintenance according to claim 2, characterized in that, The opening and closing mechanism (3) further includes a transmission assembly for driving the baffle plate (32) to rise and fall; the transmission assembly includes a rotating shaft (38), a gear (37) fixedly connected to the rotating shaft (38), and a toothed plate (36) meshing with the gear (37), the rotation of the rotating shaft (38) is converted into the horizontal displacement of the toothed plate (36) via the gear (37).

4. The oil-immersed transformer for easy maintenance according to claim 3, characterized in that, The toothed plate (36) is rotatably connected to one end of the long plate (34) via a connecting shaft (35); the other end of the long plate (34) is rotatably connected to one end of the connecting plate (33); and the other end of the connecting plate (33) is fixedly connected to the right side of the baffle plate (32) so as to convert the horizontal displacement of the toothed plate (36) into the lifting motion of the baffle plate (32).

5. The oil-immersed transformer for easy maintenance according to claim 3, characterized in that, The opening and closing mechanism (3) further includes a protective component (39) for housing and protecting the transmission component; the protective component (39) includes a housing (391) covering the gear (37) and the shaft (38) portion, and a base plate (392) for supporting the rotation of the shaft (38).

6. The oil-immersed transformer for easy maintenance according to claim 1, characterized in that, The fixed block (41) is internally slidably connected to a sliding column (44), and the long shaft (42) is rotatably inserted through the sliding column (44); the fixing mechanism (4) also includes a guard plate (49) fixed to the outside of the fixed block (41), and the guard plate (49) is used to guide the movement trajectory of the semicircular plate (48) when it contracts or opens.

7. The oil-immersed transformer for easy maintenance according to claim 1, characterized in that, An oil level gauge (2) for observing the amount of insulating oil inside is also fixedly connected to the outer wall of the oil tank (7).

8. The oil-immersed transformer for easy maintenance according to claim 1, characterized in that, The oil tank (7) is also connected to an oil pipe (6) for inputting or discharging insulating oil.

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