Iron core of oil-immersed transformer

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By setting up clamping devices and locking devices on the core of the oil-immersed transformer, the problem of large fixing gaps in the core and loose connections during transportation is solved, and the stable fixing and locking effects of the core are achieved.

CN222801547UActive Publication Date: 2025-04-25ZHEJIANG JINPAN TRANSFORMER CO LTD

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Patent Information

Application Number: CN202421581668.5
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-07-05
Publication Date: 2025-04-25
Estimated Expiration: 2034-07-05

AI Technical Summary

Technical Problem

Due to the large gap between the iron cores of existing oil-immersed transformers, the iron cores are prone to loose connections or disengagement of the iron chip during long-distance transportation.

Method used

An iron core of an oil-immersed transformer is designed. By providing a first iron core clamping device and a second iron core clamping device above and below the surface of the iron core body, and connected by a connecting rod, combining the first locking device, the second locking device, the third locking device and the fourth locking device, the fixing and locking of multiple iron chips is achieved.

Benefits of technology

It effectively solves the problems of loose connection between the core main body and the separation of the iron chip, and improves the fixing stability and transportation safety of the iron core.

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Abstract

The utility model discloses an iron core of an oil-immersed transformer, which comprises an iron core body, a first iron core clamping device and a second iron core clamping device are respectively arranged above and below the surface of the iron core body, and the second iron core clamping device is connected with the first iron core clamping device through a connecting rod. First locking devices are arranged on the two sides of the top of the first iron core clamping device, a second locking device is arranged in the middle of the top of the first iron core clamping device, third locking devices are arranged on the two sides of the bottom of the second iron core clamping device, and a fourth locking device is arranged in the middle of the bottom of the second iron core clamping device. In combination with the structural design, after the first iron core clamping device and the second iron core clamping device are arranged to splice and fix a plurality of iron core sheets, the plurality of locking devices are arranged to fix the plurality of iron core sheets and then lock the iron core sheets, so that the problems proposed in the background technology are effectively solved.

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Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to an iron core of an oil-immersed transformer. Background Art

[0002] Oil-immersed transformers use oil as the main insulation means of the transformer and rely on oil as the cooling medium, such as oil-immersed self-cooling, oil-immersed air cooling, oil-immersed water cooling and forced oil circulation. Oil-immersed transformers are a new type of high-performance transformer with a more reasonable structure and better performance. They are one of the important equipment in the power supply and distribution system of industrial and mining enterprises and civil buildings.

[0003] However, the existing oil-immersed transformer core has the following disadvantages during use: the core body is composed of multiple iron sheets fixedly spliced by the mounting feet at the bottom, and due to the fixing method of the structure, there is still a large gap between the iron sheets. During long-distance transportation, the connection of the core body is easily loosened or even the iron sheets are detached due to the overall shaking of the oil-immersed transformer. Summary of the invention

[0004] The utility model aims to provide an iron core for an oil-immersed transformer, so as to solve the problem that the iron core body mentioned in the background technology is that a plurality of iron core sheets are fixedly spliced by the mounting feet at the bottom, and due to the fixing method of the structure, there are still large gaps between the iron core sheets. During long-distance transportation, due to the overall shaking of the oil-immersed transformer, the connection of the iron core body is easily loosened or even the iron core sheets are detached.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an iron core of an oil-immersed transformer, comprising an iron core body, a first iron core clamping device and a second iron core clamping device are respectively arranged above and below the surface of the iron core body, and the second iron core clamping device is connected to the first iron core clamping device through a connecting rod, a first locking device is arranged on both sides of the top of the first iron core clamping device, a second locking device is arranged in the middle of the top of the first iron core clamping device, a third locking device is arranged on both sides of the bottom of the second iron core clamping device, and a fourth locking device is arranged in the middle of the bottom of the second iron core clamping device.

[0006] Preferably, the first core clamping device includes a first connecting frame and a second connecting frame, the first connecting frame and the second connecting frame are respectively assembled on the front end and the rear end of the upper surface of the core body, the first connecting frame and the second connecting frame are fixedly connected by bolts, and the first connecting frame and the second connecting frame have first connecting holes on their top surfaces.

[0007] Preferably, the second core clamping device includes a third connecting frame and a fourth connecting frame, and the third connecting frame and the fourth connecting frame are respectively assembled at the front end and the rear end of the lower surface of the core body, and the third connecting frame and the fourth connecting frame are fixedly connected by bolts, and the bottom surfaces of the third connecting frame and the fourth connecting frame are provided with second connecting holes.

[0008] Preferably, the first locking device includes a connecting plate and a mounting plate, the mounting plate is fixedly connected to the surface of the connecting plate, the surface of the connecting plate is provided with a plurality of through holes, and the through holes are connected to the first connecting hole by bolts, the surface of the mounting plate is provided with fixing holes, and the mounting plate and the connecting plate are designed as an integrated structure.

[0009] Preferably, the second locking device includes a connecting block, a U-shaped screw and a connecting plate, the connecting block is fixedly connected to the first connecting frame and the second connecting frame, the U-shaped screws are sleeved on both ends of the connecting plate, a third connecting hole is opened on the surface of the connecting block at a position relative to the U-shaped screw, and the connecting end of the U-shaped screw passes through the third connecting hole and is connected to the nut.

[0010] Preferably, the second locking device and the fourth locking device have the same structural design.

[0011] Preferably, the third locking device includes a mounting seat, a positioning block and a bolt, mounting holes are opened on both sides of the top surface of the mounting seat, a plurality of fourth connecting holes are opened between two of the mounting holes, a positioning block is arranged directly above the fourth connecting hole, a fifth connecting hole is opened on the surface of the positioning block, and the bolt passes through the fourth connecting hole and the fifth connecting hole to connect with the second connecting hole.

[0012] Preferably, the positioning block is made of rubber material.

[0013] Beneficial Effects

[0014] Compared with the existing technology, the beneficial effects of the utility model are:

[0015] In combination with the structural design of the utility model, after the splicing and fixation of multiple iron core sheets are realized by setting the first iron core clamping device and the second iron core clamping device, the locking function is realized after the multiple iron core sheets are fixed by setting the first locking device, the second locking device, the third locking device and the fourth locking device, thereby effectively solving the problems raised in the background technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the first locking device of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the second locking device of the utility model;

[0019] Figure 4 This is a schematic structural diagram of the third locking device of the utility model;

[0020] Figure 5 This is a schematic structural diagram of the first core clamping device of the utility model;

[0021] Figure 6 It is a structural schematic diagram of the second core clamping device of the utility model.

[0022] 1. Iron core body; 2. First iron core clamping device; 3. Second iron core clamping device; 4. First locking device; 5. Second locking device; 6. Third locking device; 7. Fourth locking device; 8. Connecting rod;

[0023] 21. First connecting frame; 22. Second connecting frame; 23. First connecting hole; 31. Third connecting frame;

[0024] 32. Fourth connecting frame; 33. Second connecting hole; 41. Connecting plate; 42. Mounting plate; 43. Through hole;

[0025] 44. Fixing hole; 51. Connecting block; 52. U-shaped screw; 53. Connecting piece; 54. Third connecting hole;

[0026] 55. nut; 61. mounting seat; 62. positioning block; 63. bolt; 64. mounting hole; 65. fourth connecting hole;

[0027] 66. Fifth connecting hole. DETAILED DESCRIPTION

[0028] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "front", "back", "inside", "outside", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore are not to be construed as limiting the present invention. In addition, the terms "first", "second" and "third" are only used for descriptive purposes and are not to be construed as indicating or implying relative importance.

[0030] like Figure 1-6 It is a structural schematic diagram of an iron core of an oil-immersed transformer in a preferred embodiment of the utility model. In this embodiment, an iron core of an oil-immersed transformer includes an iron core body 1, and a first iron core clamping device 2 and a second iron core clamping device 3 are respectively arranged above and below the surface of the iron core body 1. The first iron core clamping device 2 and the second iron core clamping device 3 are used to realize the splicing and fixing of multiple iron core sheets into the iron core body 1, and the second iron core clamping device 3 and the first iron core clamping device 2 are connected by a connecting rod 8. This structural design prevents one of the two clamping devices from being offset in position, resulting in insufficient clamping force. A first locking device 4 is arranged on both sides of the top of the first iron core clamping device 2, a second locking device 5 is arranged in the middle of the top of the first iron core clamping device 2, a third locking device 6 is arranged on both sides of the bottom of the second iron core clamping device 3, and a fourth locking device 7 is arranged in the middle of the bottom of the second iron core clamping device 3. This structural design realizes the locking function after fixing multiple iron core sheets; combined with the above-mentioned structural design, the problems raised in the background technology are effectively solved.

[0031] In this embodiment, the first core clamping device 2 includes a first connecting frame 21 and a second connecting frame 22, and the first connecting frame 21 and the second connecting frame 22 are respectively assembled at the front end and the rear end of the upper surface of the core body 1, and the first connecting frame 21 and the second connecting frame 22 are fixedly connected by bolts 63, so as to fix the upper position of the core body 1 composed of multiple core sheets after assembly, and a first connecting hole 23 is opened on the top surface of the first connecting frame 21 and the second connecting frame 22.

[0032] In this embodiment, the second core clamping device 3 includes a third connecting frame 31 and a fourth connecting frame 32, and the third connecting frame 31 and the fourth connecting frame 32 are respectively assembled at the front end and the rear end of the lower surface of the core body 1, and the third connecting frame 31 and the fourth connecting frame 32 are fixedly connected by bolts 63, so as to fix the lower position of the core body 1 composed of multiple core sheets after assembly, and a second connecting hole 33 is opened on the bottom surface of the third connecting frame 31 and the fourth connecting frame 32.

[0033] In this embodiment, the first locking device 4 includes a connecting plate 41 and a mounting plate 42, and the mounting plate 42 is fixedly connected to the surface of the connecting plate 41, and a plurality of through holes 43 are provided on the surface of the connecting plate 41. This structural design can be adapted to a variety of core bodies 1 of different thicknesses, and has better adaptability. The through holes 43 are connected to the first connecting holes 23 by bolts 63, thereby achieving fixed locking of both sides of the first connecting frame 21 and the second connecting frame 22. By utilizing this structural design, a fixing hole 44 can be provided on the surface of the mounting plate 42, and the mounting plate 42 can be fixed in the chamber of the oil-immersed transformer through the fixing holes 44 on the mounting plate 42, thereby achieving the purpose of reducing the structural design, and the mounting plate 42 and the connecting plate 41 are designed as an integrated structure, thereby improving the connectivity between them and increasing the connection strength.

[0034] In this embodiment, the second locking device 5 includes a connecting block 51, a U-shaped screw 52 and a connecting plate 53. The connecting block 51 is fixedly connected to the surfaces of the first connecting frame 21 and the second connecting frame 22. The U-shaped screws 52 are sleeved at both ends of the connecting plate 53. A third connecting hole 54 is opened on the surface of the connecting block 51 at a position relative to the U-shaped screw 52. The connecting end of the U-shaped screw 52 passes through the third connecting hole 54 and is connected to the nut 55. Through the threaded connection between the nut 55 and the U-shaped screw 52, according to the actual thickness of the core body 1, the U-shaped screws 52 on both sides tighten the connecting plate 53 by rotating the nut 55, thereby further ensuring the locking function of the core body 1 after assembly.

[0035] In this embodiment, the second locking device 5 and the fourth locking device 7 have the same structural design.

[0036] In this embodiment, the third locking device 6 includes a mounting seat 61, a positioning block 62 and a bolt 63. Mounting holes 64 are provided on both sides of the top surface of the mounting seat 61. The core body 1 can be fixedly installed in the oil-immersed transformer chamber through the mounting holes 64. A plurality of fourth connecting holes 65 are provided between the two mounting holes 64. The plurality of fourth connecting holes 65 enable the device to have a locking function that is adapted to a variety of core body 1 thicknesses. A positioning block 62 is provided directly above the fourth connecting hole 65. A fifth connecting hole 66 is provided on the surface of the positioning block 62. The bolt 63 passes through the fourth connecting hole 65 and the fifth connecting hole 66 to connect with the second connecting hole 33. This structural design enables the third locking device 6 to be fixed to the second core clamping device 3, thereby increasing the locking function below the core body 1.

[0037] In this embodiment, the positioning block 62 is made of rubber material, and its arrangement increases the scratch resistance of the surface of the core body 1 .

[0038] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. An iron core of an oil-immersed transformer, comprising an iron core body (1), characterized in that: A first core clamping device (2) and a second core clamping device (3) are respectively arranged above and below the surface of the core body (1), and the second core clamping device (3) is connected to the first core clamping device (2) via a connecting rod (8); first locking devices (4) are arranged on both sides of the top of the first core clamping device (2); a second locking device (5) is arranged in the middle of the top of the first core clamping device (2); third locking devices (6) are arranged on both sides of the bottom of the second core clamping device (3); and a fourth locking device (7) is arranged in the middle of the bottom of the second core clamping device (3).

2. The iron core of an oil-immersed transformer according to claim 1, characterized in that: The first core clamping device (2) comprises a first connecting frame (21) and a second connecting frame (22), the first connecting frame (21) and the second connecting frame (22) being respectively mounted on the front end and the rear end of the upper surface of the core body (1), the first connecting frame (21) and the second connecting frame (22) being fixedly connected by bolts (63), and the top surfaces of the first connecting frame (21) and the second connecting frame (22) being provided with first connecting holes (23).

3. The iron core of an oil-immersed transformer according to claim 1, characterized in that: The second core clamping device (3) comprises a third connecting frame (31) and a fourth connecting frame (32), wherein the third connecting frame (31) and the fourth connecting frame (32) are respectively mounted on the front end and the rear end of the lower surface of the core body (1), and the third connecting frame (31) and the fourth connecting frame (32) are fixedly connected by bolts (63), and the bottom surfaces of the third connecting frame (31) and the fourth connecting frame (32) are provided with second connecting holes (33).

4. The iron core of an oil-immersed transformer according to claim 1, characterized in that: The first locking device (4) comprises a connecting plate (41) and a mounting plate (42); the mounting plate (42) is fixedly connected to the surface of the connecting plate (41); the surface of the connecting plate (41) is provided with a plurality of through holes (43); the through holes (43) and the first connecting holes (23) are connected via bolts (63); the surface of the mounting plate (42) is provided with fixing holes (44); the mounting plate (42) and the connecting plate (41) are designed as an integrated structure.

5. The iron core of an oil-immersed transformer according to claim 1, characterized in that: The second locking device (5) comprises a connecting block (51), a U-shaped screw rod (52) and a connecting plate (53); the connecting block (51) is fixedly connected to the first connecting frame (21) and the second connecting frame (22); the U-shaped screw rod (52) is sleeved on both ends of the connecting plate (53); a third connecting hole (54) is provided on the surface of the connecting block (51) at a position relative to the U-shaped screw rod (52); and the connecting end of the U-shaped screw rod (52) passes through the third connecting hole (54) and is connected to a nut (55).

6. The iron core of an oil-immersed transformer according to claim 5, characterized in that: The second locking device (5) and the fourth locking device (7) have the same structural design.

7. The iron core of an oil-immersed transformer according to claim 1, characterized in that: The third locking device (6) comprises a mounting seat (61), a positioning block (62) and a bolt (63); mounting holes (64) are provided on both sides of the top surface of the mounting seat (61); a plurality of fourth connecting holes (65) are provided between two of the mounting holes (64); a positioning block (62) is provided directly above the fourth connecting hole (65); a fifth connecting hole (66) is provided on the surface of the positioning block (62); and the bolt (63) passes through the fourth connecting hole (65) and the fifth connecting hole (66) to be connected to the second connecting hole (33).

8. The iron core of an oil-immersed transformer according to claim 7, characterized in that: The positioning block (62) is made of rubber material.