Three-phase oil-immersed transformer with improved space utilization
By employing a detachable fixed shell and a magnet linkage system in an oil-immersed transformer, a single-hole dual-function oil filling port is achieved, solving the problem of low space utilization, improving the space utilization of the transformer, and simplifying the operation process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHEJIANG HANGEN ELECTRIC CO LTD
- Filing Date
- 2025-07-10
- Publication Date
- 2026-05-15
AI Technical Summary
Oil-immersed transformers have low space utilization due to the presence of oil filling holes and perforations when space is limited.
The oil filling hole is sealed with a detachable fixed shell. Combined with an elastic component and a magnetic linkage system, the oil filling hole can achieve dual functions in a single hole, meeting the needs of oil filling and oil level measurement, and reducing the number of holes.
It improves the space utilization of oil-immersed transformers, reduces the possibility of external impurities entering, simplifies operation procedures, and reduces liquid waste.
Smart Images
Figure CN120674193B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of oil-immersed transformers, and in particular to a three-phase oil-immersed transformer that improves space utilization. Background Technology
[0002] An oil-immersed transformer is a power transformer that uses insulating oil as both a cooling and insulating medium. Oil-immersed transformers typically utilize the circulation of oil to achieve both heat dissipation and insulation. They are suitable for use in power systems, industrial sectors, public utilities, and transportation.
[0003] In related technologies, oil-immersed transformers include a housing, an oil injection hole on the housing, an oil injection block on the housing for sealing the oil injection hole, a through hole on the housing, and an oil level component fixedly connected inside the through hole. The oil level component is used to detect the oil level inside the housing.
[0004] In some specific situations, the size requirements of oil-immersed transformers may be relatively small, resulting in limited space for oil-immersed transformers. Oil-immersed transformers have oil filling holes and perforations, which cause the oil level assembly and oil filling block to occupy different spaces, affecting the space utilization rate of oil-immersed transformers. Summary of the Invention
[0005] To improve the space utilization of oil-immersed transformers, this application provides a three-phase oil-immersed transformer with improved space utilization.
[0006] This application provides a three-phase oil-immersed transformer with improved space utilization, employing the following technical solution:
[0007] A three-phase oil-immersed transformer with improved space utilization includes a housing, a perforation on the housing, a fixing sleeve on the housing, an oil injection hole on the fixing sleeve, an oil level component for detecting oil level height on the fixing sleeve, an observation window for observing the oil level component on the fixing sleeve, and a fixing shell detachably connected to the fixing sleeve for sealing the oil injection hole.
[0008] By adopting the above technical solution, the fixed shell is detachably connected to the oil injection hole, so that the oil level component and the fixed shell can seal the oil injection hole. Compared with the two holes of oil injection hole and perforation in the prior art, this application only needs to open the oil injection hole, and this application does not need to open two holes to meet the functions of oil injection and normal oil level measurement, reduce the number of openings in the oil-immersed transformer, and improve the space utilization of the oil-immersed transformer.
[0009] Optionally, the oil injection hole is provided with a movable groove, the movable groove is provided with an elastic component, the elastic component is provided with a movable strip, the elastic component is used to drive the movable strip to protrude out of the movable groove, and the fixed shell is provided with a first receiving groove for the movable strip to be inserted; when the movable strip is inserted into the first receiving groove, the fixed shell is fixed in the oil injection hole.
[0010] By adopting the above technical solution, the elastic component drives the moving strip to move, allowing the moving strip to be inserted into the first receiving groove. This enables the moving strip to fix the fixed shell, reducing the movement of the fixed shell within the oil injection hole, thereby sealing the oil injection hole and reducing the possibility of external impurities entering the shell through the oil injection hole.
[0011] Optionally, the fixed shell has a linkage hole that connects to the first receiving groove. A linkage bar is rotatably connected in the linkage hole. One end of the linkage bar is located on the moving path of the moving bar inserted into the first receiving groove, and the other end of the linkage bar extends out of the linkage hole. The linkage bar is used to drive the moving bar to disengage from the first receiving groove.
[0012] By adopting the above technical solution, the operator drives the linkage bar to extend out of one side of the linkage hole, allowing the linkage bar to rotate within the linkage hole. This enables the linkage bar to move the moving bar, allowing the moving bar to disengage from the first receiving groove, thereby releasing the fixing between the moving bar and the fixed shell, and allowing the fixed shell to be disassembled from the housing.
[0013] Optionally, the distance between the moving groove and the ground gradually decreases along the direction from the elastic component to the moving strip, and the moving strip extends along the inclined direction of the moving groove.
[0014] By adopting the above technical solution, the distance between the moving groove and the ground gradually decreases along the direction from the elastic component to the moving strip, allowing the moving strip to extend along the inclined direction of the moving groove. When the fixed shell is inserted into the oil filling hole, the fixed shell drives the moving strip to move through the extension direction of the moving strip, allowing the moving strip to retract into the moving groove so that the fixed shell can be smoothly inserted into the oil filling hole.
[0015] Optionally, a drain tube is fitted onto the fixed shell, and a second receiving groove is formed on the outer surface of the drain tube for inserting the movable strip; when the movable strip is inserted into the second receiving groove, the drain tube is located on the oil injection hole.
[0016] By adopting the above technical solution, the drain tube is inserted into the oil filling hole. At this time, the moving strip can be located in the second receiving groove, so that the drain tube can be pre-fixed on the oil filling hole. This allows the operator to smoothly move the liquid from the drain tube and the oil filling hole into the housing, reducing the possibility of liquid adhering to the oil filling hole and preventing the sealing ring at the oil filling hole from being damaged by long-term liquid adhesion. At the same time, the drain tube can prevent liquid from splashing out when it impacts the oil level component, reducing liquid waste. When no oil is being filled into the oil filling hole, the drain tube can be sleeved on the fixed shell, allowing the fixed shell to protect the inner surface of the drain tube and reduce the possibility of contamination of the inner surface of the drain tube.
[0017] Optionally, the linkage bar is provided with a first magnet, the fixed shell is provided with a second magnet, the second magnet attracts the first magnet, and the drainage tube is located between the first magnet and the second magnet; when the second magnet attracts the first magnet and the linkage bar rotates, the linkage bar drives the moving bar to disengage from the first receiving groove.
[0018] By adopting the above technical solution, the second magnet attracts the first magnet, allowing the linkage bar to rotate within the linkage hole, thus enabling the linkage bar to drive the moving bar to disengage from the first receiving groove. Since the drainage tube is located between the first and second magnets, it can restrict the rotation of the linkage bar, allowing the moving bar to remain within the first receiving groove. When the drainage tube is removed from the fixed shell, the moving bar can automatically disengage from the first receiving groove, unlocking the fixed shell and reducing the number of steps required by the operator.
[0019] Optionally, the fixed shell is provided with a sealing ring, which is located on the side of the linkage bar away from the fixed shell; when the linkage bar abuts against the drainage tube, the linkage bar drives the sealing ring to deform in the direction away from the fixed shell.
[0020] By adopting the above technical solution, when the drainage pipe is located on the fixed shell, the drainage pipe restricts the rotation of the linkage bar. By having the sealing ring located on the side of the linkage sleeve away from the fixed shell, the linkage bar can abut against the sealing ring, causing the sealing ring to deform in the direction away from the fixed shell, thereby further reducing the gap between the sealing ring and the wall of the oil injection hole.
[0021] Optionally, the fixed shell is provided with an annular groove for inserting a drainage tube; when the drainage tube is inserted into the annular groove, the drainage tube is sleeved on the fixed shell.
[0022] By adopting the above technical solution, the drainage tube is inserted into the annular groove, making it less likely for the drainage tube to shake on the fixed shell, thus reducing the possibility that the linkage bar can cause the drainage tube to move and thus cause the linkage bar to move away from the first receiving groove.
[0023] In summary, this application includes at least one of the following beneficial technical effects:
[0024] 1. The fixed shell is detachably connected to the oil filling hole, so that the oil level assembly and the fixed shell can seal the oil filling hole. Compared with the two holes of oil filling hole and perforation in the prior art, this application only needs to open the oil filling hole. Moreover, this application does not need to open the oil filling hole to meet the functions of oil filling and normal oil level measurement, thereby improving the space utilization of oil-immersed transformer.
[0025] 2. The first magnet is attracted by the second magnet, allowing the linkage bar to rotate within the linkage hole, thus enabling the linkage bar to drive the moving bar to disengage from the first receiving groove. Since the drainage tube is located between the first and second magnets, it can restrict the rotation of the linkage bar, allowing the moving bar to remain within the first receiving groove. When the drainage tube is removed from the fixed shell, the moving bar can automatically disengage from the first receiving groove, unlocking the fixed shell and reducing the number of steps required by the operator. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application;
[0027] Figure 2 It is along Figure 1 A partial sectional view of line AA in the middle;
[0028] Figure 3 This is a schematic diagram of the structure of Embodiment 2 of this application;
[0029] Figure 4 It is along Figure 3 A partial sectional view of the middle BB line;
[0030] Figure 5 yes Figure 4 An enlarged schematic diagram of section C.
[0031] Reference numerals: 1. Housing; 2. Fixing sleeve; 21. Oil filling hole; 22. Moving groove; 221. Elastic component; 222. Moving strip; 3. Oil level component; 31. Observation window; 4. Fixing shell; 41. Fixing groove; 42. Fixing column; 43. Fixing block; 44. First receiving groove; 45. Linkage hole; 451. Linkage strip; 46. First groove; 461. First magnet; 462. Second groove; 463. Second magnet; 47. Drainage pipe; 471. Drainage hole; 472. Annular groove; 473. Second receiving groove; 48. Sealing ring; 481. Sealing groove. Detailed Implementation
[0032] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.
[0033] Example 1
[0034] This embodiment discloses a three-phase oil-immersed transformer that improves space utilization. (Refer to...) Figure 1 and Figure 2 A three-phase oil-immersed transformer with improved space utilization includes a housing 1. A through hole is provided on the outer surface of the housing 1, and a fixing sleeve 2 is threadedly connected to the through hole. An oil injection hole 21 for liquid to enter is provided on the fixing sleeve 2.
[0035] Reference Figure 1 and Figure 2 The fixed sleeve 2 contains an oil level assembly 3, which is used to detect the oil level in the housing 1. An observation window 31 is provided on the fixed sleeve 2 for observing the status of the oil level assembly 3. A fixed shell 4 is provided on the fixed sleeve 2, and a fixing groove 41 is provided on the fixing shell 4, into which one end of the fixed sleeve 2 extends. An internal thread is provided on the inner wall of the fixing groove 41, and an external thread is fixedly connected to the outer surface of the fixed sleeve 2, with the external thread threaded onto the internal thread, thus sealing the oil filling hole 21 with the fixed shell 4.
[0036] The implementation principle of Example 1 is as follows: the staff twists the fixing shell 4 to block the oil injection hole 21.
[0037] Example 2
[0038] Reference Figure 3 and Figure 4 The difference between this embodiment and Embodiment 1 is that a fixing post 42 is integrally formed on the end face of the fixing shell 4 away from the fixing groove 41, and a fixing block 43 is integrally formed on the bottom wall of the fixing groove 41. An external thread is fixedly connected to the outer surface of the fixing block 43, and an internal thread is formed on the wall of the oil injection hole 21. The internal and external threads are threadedly connected to each other. The fixing post 42 is used to drive the fixing shell 4 to rotate. When the fixing shell 4 is screwed onto the fixing sleeve 2, the internal thread of the groove wall of the fixing groove 41 and the external thread on the outer surface of the fixing sleeve 2 are threadedly connected, and the external thread of the fixing shell 4 and the internal thread of the oil injection hole 21 further increase the connection strength between the fixing shell 4 and the fixing sleeve 2.
[0039] Reference Figure 4 Multiple movable grooves 22 are provided on the wall of the oil injection hole 21. The multiple movable grooves 22 are distributed in a circumferential array along the oil injection hole 21. The distance between the movable grooves 22 and the ground gradually decreases along the direction from the movable grooves 22 to the axis of the oil injection hole 21.
[0040] Reference Figure 4An elastic component 221, including an elastic spring, is provided inside the moving groove 22. A moving strip 222 is fixedly connected to one end of the elastic spring, and the other end of the elastic spring is fixedly connected to the bottom wall of the moving groove 22. The moving strip 222 extends along the inclined direction of the moving groove 22, and the end of the moving strip 222 away from the elastic spring is an arc surface. When the moving strip 222 protrudes from the moving groove 22, the elastic spring is in a compressed state.
[0041] Reference Figure 4 The outer surface of the fixing block 43 is provided with a plurality of first receiving grooves 44, which are arranged in a circumferential array along the fixing shell 4, and the first receiving grooves 44 are for the insertion of the moving strip 222. When the fixing shell 4 is threaded into the oil injection hole 21, the fixing shell 4 drives the moving strip 222 to move in the moving groove 22, so that the moving strip 222 can retract into the moving groove 22 until the moving strip 222 is inserted into the first receiving groove 44, thereby achieving mutual fixation between the fixing shell 4 and the shell 1.
[0042] Reference Figure 4 The fixed shell 4 has multiple linkage holes 45 on the end face of the fixed post 42. The linkage holes 45 extend through the fixed block 43 and are connected to the first receiving groove 44. A linkage bar 451 is rotatably connected inside the linkage hole 45. One end of the linkage bar 451 extends out of the linkage hole 45, and the other end of the linkage bar 451 is located in the first receiving groove 44. The linkage bar 451 can drive the moving bar 222 to disengage from the first receiving groove 44.
[0043] Reference Figure 4 A first groove 46 is formed on the surface of the linkage bar 451, and a first magnet 461 is fixedly connected in the first groove 46. Multiple second grooves 462 are formed on the outer surface of the fixing post 42, and second magnets 463 are fixedly connected in the second grooves 462. The second magnets 463 are used to attract the first magnets 461. When the second magnets 463 attract the first magnets 461, the end of the linkage bar 451 away from the ground rotates towards the fixing shell 4, allowing the other end of the linkage bar 451 to drive the moving bar 222 out of the first receiving groove 44, thereby unlocking the fixing shell 4 and the shell 1.
[0044] Reference Figure 4 A drainage tube 47 is fitted onto the fixed column 42, and a drainage hole 471 is provided on the drainage tube 47 for liquid flow. An annular groove 472 is provided on the end face of the fixed shell 4 away from the ground for the drainage tube 47 to be inserted. When the drainage tube 47 is located in the annular groove 472, the inner surface of the drainage tube 47 near the fixed column 42 does not abut against the fixed column 42, and the outer surface of the drainage tube 47 away from the fixed column 42 abuts against the linkage bar 451. At this time, the drainage tube 47 restricts the rotation of the linkage bar 451, allowing the moving bar 222 to be located in the first receiving groove 44.
[0045] Reference Figure 4 The outer surface of the drainage pipe 47 is provided with a plurality of second receiving grooves 473, which are arranged in a circumferential array along the drainage pipe 47, and the second receiving grooves 473 are for the insertion of the moving strip 222. When the drainage pipe 47 is inserted into the oil injection hole 21, the moving strip 222 is inserted into the second receiving groove 473 to fix the drainage pipe 47, so as to fix the drainage pipe 47 and the oil pipeline, and the liquid is injected into the housing 1 from the drainage pipe 47, so that the liquid does not adhere to the hole wall of the oil injection hole 21.
[0046] Reference Figure 4 and Figure 5 A sealing groove 481 communicating with the linkage hole 45 is formed on the outer surface of the fixing block 43, and the sealing groove 481 extends circumferentially along the fixing block 43. A sealing ring 48 is fitted inside the sealing groove 481. The sealing ring 48 is located on the side of the linkage bar 451 away from the fixing shell 4, and the sealing ring 48 is located on the moving path of the end of the linkage bar 451 away from the moving bar 222. When the linkage bar 451 abuts against the outer surface of the drainage tube 47, the linkage bar 451 abuts against the side of the sealing ring 48 close to the fixing block 43, causing the linkage bar 451 to drive the sealing ring 48 to deform in a direction away from the fixing block 43, thereby strengthening the sealing between the sealing ring 48 and the drainage hole 471.
[0047] The implementation principle of Example 2 is as follows: First, the worker takes the drainage tube 47 out of the annular groove 472, and lets the second magnet 463 attract the first magnet 461, so that the linkage bar 451 drives the moving bar 222 to disengage from the first receiving groove 44. Then, the worker rotates the fixed shell 4 to remove the fixed shell 4 from the fixed sleeve 2. Finally, the worker inserts the drainage tube 47 into the oil injection hole 21 and lets the moving bar 222 insert into the second receiving groove 473.
[0048] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0049] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of this application should be included within the protection scope of this application.
Claims
1. A three-phase oil-immersed transformer with improved space utilization, characterized in that: Includes a housing (1), the housing (1) having a through hole, a fixed sleeve (2) being threadedly connected to the through hole, the fixed sleeve (2) having an oil filling hole (21), the fixed sleeve (2) having an oil level assembly (3) for detecting oil level height, the fixed sleeve (2) having an observation window (31) for observing the oil level assembly (3), and a fixed shell (4) being detachably connected to the fixed sleeve (2), the fixed shell (4) being used to block the oil filling hole (21); The oil filling hole (21) is provided with a movable groove (22), and an elastic component (221) is provided in the movable groove (22). The elastic component (221) is provided with a movable strip (222). The elastic component (221) is used to drive the movable strip (222) to protrude out of the movable groove (22). The fixed shell (4) is provided with a first receiving groove (44) for the movable strip (222) to be inserted. When the movable strip (222) is inserted into the first receiving groove (44), the fixed shell (4) is fixed in the oil filling hole (21). The fixed shell (4) is provided with a linkage hole (45) that connects to the first receiving groove (44). A linkage bar (451) is rotatably connected in the linkage hole (45). One end of the linkage bar (451) is located on the moving path of the moving bar (222) inserted into the first receiving groove (44). The other end of the linkage bar (451) extends out of the linkage hole (45). The linkage bar (451) is used to drive the moving bar (222) to disengage from the first receiving groove (44). The fixed shell (4) is fitted with a drain pipe (47), and a second receiving groove (473) for inserting the moving strip (222) is provided on the outer surface of the drain pipe (47); when the moving strip (222) is inserted into the second receiving groove (473), the drain pipe (47) is located on the oil injection hole (21).
2. A three-phase oil-immersed transformer for improving space utilization according to claim 1, characterized in that: The distance between the moving groove (22) and the ground gradually decreases along the direction from the elastic component (221) to the moving strip (222), and the moving strip (222) extends along the inclined direction of the moving groove (22).
3. A three-phase oil-immersed transformer for improving space utilization according to claim 1, characterized in that: The linkage bar (451) is provided with a first magnet (461), and the fixed shell (4) is provided with a second magnet (463). The second magnet (463) attracts the first magnet (461), and the drainage tube (47) is located between the first magnet (461) and the second magnet (463). When the second magnet (463) attracts the first magnet (461) and the linkage bar (451) rotates, the linkage bar (451) drives the moving bar (222) to disengage from the first receiving groove (44).
4. A three-phase oil-immersed transformer for improving space utilization according to claim 3, characterized in that: The fixed shell (4) is provided with a sealing ring (48), which is located on the side of the linkage bar (451) away from the fixed shell (4). When the linkage bar (451) abuts against the drainage tube (47), the linkage bar (451) drives the sealing ring (48) to deform in the direction away from the fixed shell (4).
5. A three-phase oil-immersed transformer for improving space utilization according to claim 1, characterized in that: The fixed shell (4) has an annular groove (472) for inserting the drainage tube (47); when the drainage tube (47) is inserted into the annular groove (472), the drainage tube (47) is sleeved on the fixed shell (4).