Transformer iron core fixing device

Abstract

The utility model discloses a transformer iron core fixing device which comprises clamping devices, a vertical connecting structure, a pillow frame and a mounting frame, and the two clamping devices are connected through the vertical connecting structure; each clamping device comprises a clamping frame and a transverse connecting structure, and the two sides of the two clamping frames are connected through the transverse connecting structures; each transverse connecting structure comprises two elastic pieces, a transverse screw rod and an insulating sleeve, and the two elastic pieces are embedded in the clamping frame; the transverse screw rod penetrates through the two elastic pieces and is locked; the insulating sleeve is sleeved on the transverse screw rod; and the clamping device at the bottom is connected with the mounting frame through a pillow frame. According to the utility model, the clamping device is combined with the elastic piece, so that the iron core is clamped, the stability of the iron core in operation is ensured, a necessary space is provided for tiny thermal expansion of the iron core caused by temperature rise, the risks of deformation of the iron core and insulation damage are effectively avoided, and the service life of the iron core is prolonged. And the long-term operation reliability and the service life of the transformer are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, and particularly relates to a fixing device for a transformer core. Background Art

[0002] The iron core is a crucial part of a transformer. It is composed of many thin silicon steel sheets stacked together to guide magnetic flux. Whether it is properly fixed directly affects the efficiency, safety, and lifespan of the transformer.

[0003] The transformer core fixing device is a device used to ensure that the transformer core remains stable, correctly aligned, and reduces vibration during operation.

[0004] In related technologies, the fixing of the transformer core is mostly achieved through the fixing method of an upper pressing plate and a lower bottom plate, that is, the core is clamped by the upper pressing plate and the lower bottom plate, and the two are connected by bolts or screws to ensure the stability of the core.

[0005] However, in the above method, during operation, the transformer core and winding will generate slight thermal expansion due to the heat caused by the current. If the upper pressing plate and the lower bottom plate are fixed too tightly without enough room for thermal expansion, it will lead to an increase in internal stress, which will cause the core to deform or the insulation to be damaged under long-term action. Summary of the Invention

[0006] The utility model aims to solve at least one of the technical problems in the above technologies to a certain extent.

[0007] To achieve the above object, a first aspect of the utility model proposes a fixing device for a transformer core, including: a clamping device, a vertical connection structure, a pillow support, and a mounting frame. Among them, the two clamping devices are arranged relatively from top to bottom and are connected by the vertical connection structure; each clamping device includes a clamping frame and a horizontal connection structure. Among them, the two clamping frames are arranged relatively; both sides of the two clamping frames are connected by the horizontal connection structure respectively to clamp the core between the two horizontal connection structures and the two clamping frames; each horizontal connection structure includes two elastic members, a horizontal screw, and an insulating sleeve. Among them, the two elastic members are respectively embedded in the corresponding clamping frames; the horizontal screw passes through the two elastic members in sequence and is locked; the insulating sleeve is sleeved on the horizontal screw; the bottom clamping device is connected to the mounting frame through the pillow support.

[0008] In addition, the fixing device for a transformer core proposed by the utility model as above may also have the following additional technical features:

[0009] As a further description of the above technical solution: The elastic member includes a rod sleeve and a rubber column. Among them, a through hole is provided on the clamping frame, and the rod sleeve is embedded in the through hole; the rubber column is sleeved on the rod sleeve, and both ends of the rubber column respectively abut against the outer side of the clamping frame and the edge retaining ring of the rod sleeve.

[0010] As a further description of the above technical solution: A plurality of the through holes are provided along the length direction of the clamping frame.

[0011] As a further description of the above technical solution: The vertical connection structure includes a vertical screw, a locking nut and a limit nut. Among them, the clamping frame is a C-shaped steel frame, the vertical screw penetrates through the upper and lower two clamping frames on the same side and is locked by the locking nut; the two limit nuts are respectively locked on the vertical screw to limit the vertical direction of the two clamping frames.

[0012] As a further description of the above technical solution: A support plate is provided on the clamping device at the bottom to support the iron core.

[0013] As a further description of the above technical solution: The pillow frame is of a C-shaped structure, and the upper and lower ends of the pillow frame are respectively connected to the clamping device at the bottom and the mounting frame through bolts.

[0014] As a further description of the above technical solution: Mounting holes are provided on the mounting frame or height-adjustable feet are provided.

[0015] According to the transformer iron core fixing device of the present invention, by adopting the combination of the clamping device and the elastic member, a stable and appropriate clamping of the iron core is achieved, which not only ensures the stability of the iron core during operation, but also provides necessary space for the slight thermal expansion of the iron core caused by temperature rise, thereby reducing the accumulation of internal stress, effectively avoiding the risks of iron core deformation and insulation damage, and improving the long-term operation reliability and service life of the transformer.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of the embodiments in conjunction with the drawings, wherein:

[0018] Figure 1 is a schematic structural diagram of a transformer iron core fixing device according to an embodiment of the present invention;

[0019] Figure 2It is a front view structural schematic diagram of a transformer core fixing device according to an embodiment of the present utility model;

[0020] Figure 3 It is a partial enlarged structural schematic diagram of part A according to an embodiment of the present utility model;

[0021] Figure 4 It is a side view structural schematic diagram of a transformer core fixing device according to an embodiment of the present utility model;

[0022] Figure 5 It is a partial enlarged structural schematic diagram of part B according to an embodiment of the present utility model;

[0023] Figure 6 It is an exploded schematic diagram of a clamping device according to an embodiment of the present utility model;

[0024] Figure 7 It is a structural schematic diagram of the transformer core fixing device without fixing the core according to an embodiment of the present utility model;

[0025] As shown in the figure:

[0026] 100. Clamping device; 101. Support plate; 110. Clamping frame; 111. Through hole; 120. Transverse connection structure; 121. Elastic member; 1211. Rod sleeve; 1212. Rubber column; 122. Transverse screw; 123. Insulating sleeve; 200. Vertical connection structure; 210. Vertical screw; 220. Locking nut; 230. Limit nut; 300. Pillow frame; 400. Mounting frame; 500. Core. Detailed implementation manners

[0027] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present utility model, but should not be construed as limiting the present utility model.

[0028] The transformer core fixing device of the embodiment of the present utility model will be described below with reference to the accompanying drawings.

[0029] As Figure 1 shown, the transformer core fixing device of the embodiment of the present utility model may include a clamping device 100, a vertical connection structure 200, a pillow frame 300, and a mounting frame 400.

[0030] Among them, two clamping devices 100 are arranged relatively from top to bottom and are connected by a vertical connection structure 200.

[0031] It should be noted that, in order to further improve the connection stability of the vertical connection structure 200, two opposite vertical connection structures 200 are respectively arranged on the same side of the two clamping devices 100.

[0032] Each clamping device 100 includes a clamping frame 110 and a transverse connection structure 120.

[0033] Among them, the two clamping frames 110 are arranged oppositely, and both sides of the two clamping frames 110 are connected by the transverse connection structure 120 respectively, so as to clamp the iron core 500 within the two transverse connection structures 120 and the two clamping frames 110.

[0034] Each transverse connection structure 120 includes two elastic members 121, a transverse screw 122 and an insulating sleeve 123. Among them, the two elastic members 121 are respectively embedded in the corresponding clamping frame 110; the transverse screw 122 passes through the two elastic members 121 in sequence and is locked; the insulating sleeve 123 is sleeved on the transverse screw 122.

[0035] In an embodiment of the present utility model, as Figures 4 to 6 shown, the elastic member 121 includes a rod sleeve 1211 and a rubber column 1212.

[0036] Among them, a through hole 111 is formed on the clamping frame 110, the rod sleeve 1211 is embedded in the through hole 111, the rubber column 1212 is sleeved on the rod sleeve 1211, and both ends of the rubber column 1212 respectively abut against the outer side of the clamping frame 110 and the edge retaining ring of the rod sleeve 1211.

[0037] It should be noted that edge retaining rings are arranged at both ends of the rod sleeve 1211, one of the edge retaining rings abuts against the inner side of the clamping frame 110, and the other edge retaining ring abuts against the rubber column 1212.

[0038] The clamping device 100 at the bottom is connected to the mounting frame 400 through a pillow frame 300.

[0039] Specifically, when the whole device is used to fix the iron core 500, the two clamping frames 110 in each clamping device 100 are respectively placed oppositely, the iron core 500 is placed between the two clamping frames 110, and then after the cross bar screw passes through the rod sleeve 1211 in sequence, it is fixed by the way of bolt locking. At this time, under the pushing action of the locking, both ends of the rubber column 1212 respectively abut against the corresponding clamping frame 110 and the edge retaining ring of the corresponding rod sleeve 1211. Then, the relevant staff connect the two vertically arranged clamping devices 100 through the vertical connection structure 200, and connect the clamping device 100 at the bottom to the pillow frame 300, so that the pillow frame 300 is installed on the mounting frame 400.

[0040] When the iron core 500 is heated due to work, the expanding iron core 500 pushes the clamping frames 110 on both sides, causing the clamping frames to squeeze the rubber columns 1212. At this time, the rubber columns 1212 are slightly deformed to adapt to the expansion of the iron core 500. After the work is completed, the iron core 500 stops working and the temperature drops. Then, the iron core 500 shrinks after cooling. Since the rubber columns 1212 are elastic, the previously squeezed rubber columns 1212 reset and push the clamping frames 110 to reset, maintaining the clamping effect of the clamping frames 110 on the iron core 500.

[0041] In an embodiment of the present invention, a plurality of through holes 111 are provided along the length direction of the clamping frame 110.

[0042] It should be noted that relevant staff can select the through hole positions adapted to the size of the iron core 500 and lock the horizontal connection structure 120.

[0043] In an embodiment of the present invention, as Figure 2 shown, the vertical connection structure 200 includes a vertical screw 210, a locking nut 220 and a limit nut 230.

[0044] Among them, the clamping frame 110 is a C-shaped steel frame. The vertical screw 210 passes through the upper and lower two clamping frames 110 on the same side and is locked by the locking nut 220. The two limit nuts 230 are respectively locked on the vertical screw 210 to limit the vertical direction of the two clamping frames 110.

[0045] It should be noted that the two limit nuts 230 can effectively prevent the two clamping frames 110 from moving closer to each other, maintaining the stability of the clamping frames 110. In addition, the application of the vertical connection structure 200 and the limit nuts 230 ensures the precise alignment and vertical stability between the upper and lower two clamping devices 100, simplifies the installation process, provides an easy-to-adjust mechanism, facilitates on-site installation and debugging, and improves the assembly efficiency and use flexibility.

[0046] In an embodiment of the present invention, as Figure 7 shown, a support plate 101 is provided on the bottom clamping device 100 to support the iron core 500, further enhancing the support for the iron core 500. Especially when bearing heavy loads or vibrations, it can effectively disperse the load, reduce local stress concentration, and protect the iron core 500 from damage.

[0047] In an embodiment of the present invention, as Figure 2 and Figure 3As shown in the figure, the pillow frame 300 is of a C-shaped structure, and the upper and lower ends of the pillow frame 300 are respectively connected to the clamping device 100 at the bottom and the mounting frame 400 by bolts. Through the height design of the pillow frame 300, the distance between the iron core 500 and the mounting frame 400 can be increased to some extent, improving the ventilation and heat dissipation between the iron core 500 and the mounting frame 400 and avoiding the situation of the temperature rise of the iron core 500.

[0048] In an embodiment of the present utility model, the mounting frame 400 is provided with mounting holes or height-adjustable feet, which not only optimize the stability of the overall structure but also provide convenient installation and adjustment functions, enabling the fixing device to adapt to more variable installation environments and enhancing the versatility and convenience of use.

[0049] In summary, according to the transformer iron core fixing device of the embodiment of the present utility model, by adopting the combination of the clamping device 100 and the elastic member 121, a firm and appropriate clamping of the iron core 500 is achieved, which not only ensures the stability of the iron core 500 during operation but also provides necessary space for the slight thermal expansion of the iron core 500 caused by temperature rise, thereby reducing the accumulation of internal stress, effectively avoiding the risks of deformation and insulation damage of the iron core 500, and improving the long-term operation reliability and service life of the transformer.

[0050] In the description of this specification, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0051] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0052] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A transformer core fixing device, characterized in that: include: A clamping device (100), a vertical connection structure (200), a pillow frame (300) and a mounting frame (400), wherein: The two clamping devices (100) are arranged opposite to each other from top to bottom and are connected via the vertical connection structure (200); Each of the clamping devices (100) comprises a clamping frame (110) and a transverse connecting structure (120), wherein: The two clamping frames (110) are arranged opposite to each other; The two sides of the two clamping frames (110) are respectively connected via the transverse connection structure (120) so as to clamp the iron core (500) within the two transverse connection structures (120) and the two clamping frames (110); Each of the transverse connection structures (120) comprises two elastic members (121), a transverse screw rod (122) and an insulating sleeve (123), wherein the two elastic members (121) are respectively embedded in the corresponding clamping frame (110); the transverse screw rod (122) passes through the two elastic members (121) in sequence and is locked; and the insulating sleeve (123) is sleeved on the transverse screw rod (122); The clamping device (100) at the bottom is connected to the mounting frame (400) via the pillow frame (300).

2. The transformer core fixing device according to claim 1, characterized in that: The elastic member (121) comprises a rod sleeve (1211) and a rubber column (1212), wherein: The clamping frame (110) is provided with a through hole (111), and the rod sleeve (1211) is embedded in the through hole (111); The rubber column (1212) is sleeved on the rod sleeve (1211), and two ends of the rubber column (1212) respectively abut against the outer side of the clamping frame (110) and the edge retaining ring of the rod sleeve (1211).

3. The transformer core fixing device according to claim 2, characterized in that: A plurality of through holes (111) are provided along the length direction of the clamping frame (110).

4. The transformer core fixing device according to claim 1, characterized in that: The vertical connection structure (200) comprises a vertical screw rod (210), a locking nut (220) and a limiting nut (230), wherein: The clamping frame (110) is a C-shaped steel frame, and the vertical screw rod (210) passes through the upper and lower clamping frames (110) on the same side and is locked by the locking nut (220); The two limiting nuts (230) are respectively locked on the vertical screw rod (210) to limit the vertical direction of the two clamping frames (110).

5. The transformer core fixing device according to claim 1, characterized in that: A support plate (101) is provided on the clamping device (100) at the bottom to support the iron core (500).

6. The transformer core fixing device according to claim 1, characterized in that: The pillow frame (300) is a C-shaped structure, and the upper and lower ends of the pillow frame (300) are respectively connected to the clamping device (100) and the mounting frame (400) at the bottom by bolts.

7. The transformer core fixing device according to claim 1, characterized in that: The mounting frame (400) is provided with a mounting hole or a height-adjustable support foot.

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