Transformer iron core assembling device

Abstract

The utility model relates to the technical field of transformers, in particular to a transformer iron core assembling device which comprises an iron core, a coil and a clamping plate assembly, the clamping plate assembly comprises four clamping pieces, a transverse pull rod and a vertical pull rod, two of the clamping pieces are matched with the transverse pull rod to clamp the upper portion of the iron core, and the vertical pull rod is matched with the upper portion of the iron core. The other two clamping pieces are matched with a transverse pull rod to be used for clamping the lower portion of the iron core, and the two clamping pieces used for clamping the upper portion of the iron core and the two clamping pieces used for clamping the lower portion of the iron core are connected through a vertical pull rod. The clamping piece at least comprises a vertical part capable of being attached to the iron core and a horizontal part connected with the vertical part, a slotted hole is formed in the vertical part, and the slotted hole is formed in the vertical part of the iron core, so that the heat dissipation effect of the clamping piece and the iron core can be better, and the situation that the transformer is damaged due to the fact that the local temperature of the iron core is too high is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a transformer core assembly device. Background Art

[0002] The transformer core assembly device includes a clamping plate assembly and a core composed of silicon steel sheets. After the silicon steel sheets are stacked and placed together, the clamping plate assembly is needed to clamp and fix them to keep the silicon steel sheets that make up the core tightly attached to each other. The clamping plate assembly includes clamping plates, transverse pull rods and vertical pull rods, wherein the transverse pull rods are used to maintain the clamping force between the clamping plates, and the vertical pull rods are used to make the upper clamping plates and the lower clamping plates form a whole. The defect of the existing problem is that since the iron core of the transformer will generate a large amount of heat during operation, and the clamping plates of the clamping plate assembly are tightly attached to both sides of the iron core, the heat dissipation effect of the iron core is not good. If the iron core is at a high local temperature for a long time, it may cause the insulation layer between the iron core and the clamping plates to age, affecting the service life of the transformer. Based on the above situation, it is necessary to design a transformer core assembly device to solve the above problem. Utility Model Content

[0003] The utility model provides a transformer core assembly device, which can improve the heat dissipation effect of the core during the use of the transformer, and avoid aging of the insulation layer of the core due to high local temperature, thereby affecting the service life of the transformer.

[0004] The technical problem solved by the utility model is achieved by the following technical solutions:

[0005] A transformer core assembly device includes an iron core, a coil and a clamping plate assembly, wherein the clamping plate assembly includes a clamp, a transverse tie rod and a vertical tie rod, wherein four clamps are provided, wherein two of the clamps cooperate with the transverse tie rods to clamp the upper portion of the iron core, and the other two clamps cooperate with the transverse tie rods to clamp the lower portion of the iron core, the two clamps for clamping the upper portion of the iron core and the two clamps for clamping the lower portion of the iron core are connected via the vertical tie rod, and the clamps include at least a vertical portion capable of being attached to the iron core and a horizontal portion connected to the vertical portion, wherein a slot is provided on the vertical portion.

[0006] Preferably, the slot hole vertically penetrates the vertical portion, and a thin-walled area is formed on a side of the slot hole close to the iron core.

[0007] Preferably, there are a plurality of slots, and the plurality of slots are evenly spaced and linearly arranged on the vertical portion, and a supporting rib is formed between two adjacent slots.

[0008] Preferably, a fracture portion is provided on the thin-walled area of ​​the slot.

[0009] Preferably, the slot hole passes through the vertical portion transversely.

[0010] Preferably, a reinforcing rib is further provided on a side of the vertical portion away from the iron core.

[0011] The beneficial effect of the utility model is that by providing slots on the vertical part of the iron core, the heat dissipation effect of the clip and the iron core can be improved, thereby preventing the local temperature of the iron core from being too high and causing damage to the transformer.

[0012] The reinforcement ribs are provided to increase the anti-bending effect of the clip and avoid the lack of rigidity caused by the slots in the vertical part. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the implementation scheme of the utility model or the technical scheme in the prior art, the drawings required for use in the implementation scheme or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation schemes of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1 This is a schematic diagram of the assembly process of the utility model:

[0015] Figure 2 This is a schematic diagram of the structure of the utility model after assembly;

[0016] Figure 3 This is a schematic structural diagram of the first embodiment of the clip of the utility model;

[0017] Figure 4 For this utility model Figure 3 A is an enlarged schematic diagram;

[0018] Figure 5 This is a structural schematic diagram of the second embodiment of the clip of the utility model;

[0019] Figure 6 For this utility model Figure 5 A schematic diagram of the second perspective structure;

[0020] Figure 7 This is a schematic structural diagram of the third embodiment of the utility model;

[0021] Figure 8 For this utility model Figure 5 Schematic diagram of the enlarged structure at point B in the middle.

[0022] In the figure, 1, iron core; 2, clip; 201, vertical part; 202, horizontal part; 203, transverse perforation; 204, vertical perforation; 205, reinforcing rib; 206, slot; 207, thin-walled area; 208, supporting rib; 209, fracture part; 3, transverse tie rod; 4, vertical tie rod; 5, coil. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.

[0024] refer to Figure 1-Figure 2 , a transformer core assembly device, comprising a clamping plate assembly, a coil 5 and a core 1, wherein the clamping plate assembly comprises a clamping piece 2, a transverse tie rod 3 and a vertical tie rod 4, as Figure 1 As shown, there are four clips 2. During the assembly process, first use two clips 2 to clamp the lower part of the core 1, and use two clips 2 to attach to both sides of the core 1. Then use the transverse pull rod 3 to cooperate with the transverse through hole 203 on the clip 2 to lock the two clips 2, and keep sufficient locking force between the two lower clips 2. When the lower part of the core 1 is clamped, as shown in FIG. Figure 2 As shown, the coil 5 can be sleeved on the middle position of the core 1, and then the upper part of the core 1 is spliced, and then the other two clips 2 are used to cooperate with the horizontal pull rod 3 to clamp the upper part of the core 1, and finally the vertical pull rod 4 is used to cooperate with the longitudinal perforation on the clip 2 to connect the upper clip 2 and the lower clip 2. The above is the assembly process of the existing transformer core assembly device. The problem of the existing transformer core 1 after assembly is that the clip 2 is attached to the side of the core 1. After the core 1 generates heat, it can only transfer the heat to the clip 2 through slow heat transfer, and then release the heat through the clip 2. The heat dissipation effect of this process is poor, which can easily lead to a high local temperature in the area where the core 1 is attached, resulting in damage to the transformer. Based on the above problems, the utility model makes the following improvements to the existing transformer core assembly device.

[0025] The improved transformer core assembly device can accelerate the heat dissipation of the side of the core 1 attached to the clip 2. The improvement is mainly achieved by improving the clip 2. Figure 3 The clip 2 mainly includes a vertical portion 201 and a horizontal portion 202. Figure 3The clip 2 in the figure is composed of a vertical portion 201 and two horizontal portions 202, but the actual clip 2 may also be composed of only one vertical portion 201 and one horizontal portion 202. One side of the vertical portion 201 is attached to the side of the core 1, and a horizontal through hole 203 is provided on the vertical portion 201. The horizontal portion 202 can be integrally formed at the upper and lower ends of the vertical portion 201, or can be fixed to the vertical portion 201 by welding. The horizontal portion 202 has a vertical through hole 204 to facilitate the installation of the vertical pull rod 4. Since the side of the core 1 is covered when it is clamped by the clip 2, the heat dissipation effect of the core 1 is deteriorated, so A slot 206 is provided on the vertical portion 201 attached to the side of the core 1 to achieve rapid heat dissipation of the clip 2 and the core 1. The vertical portion 201 of the existing clip 2 is mostly solid, and its cover on the side of the core 1 is thick, resulting in poor heat dissipation effect. The slot 206 is provided on the vertical portion 201 to increase the contact area between the clip 2 and the heat dissipation medium (the heat dissipation medium in the oil-immersed transformer is oil, and the heat dissipation medium in the dry-type transformer is air), so that the clip 2 can dissipate heat quickly. At the same time, since the heat dissipation medium in the slot 206 is relatively far away from the core 1, the heat dissipation of the core 1 can also be accelerated. Several embodiments of the improved clip 2 will be described in detail below.

[0026] refer to Figure 3 and Figure 4 , is the first embodiment of the clip 2 of the utility model. In this embodiment, the slot 206 is vertically opened on the vertical portion 201 of the clip 2, and the slot 206 forms a thin-walled area 207 on the side close to the core 1. During use, the heat dissipation medium inside the slot 206 is only a thin-walled area 207 away from the side wall of the core 1. Therefore, it has a better heat dissipation effect on the core 1. After absorbing heat, the heat dissipation medium inside the slot 206 can rise along the slot 206, so that the heat dissipation medium inside the slot 206 can flow, thereby improving the heat dissipation effect. Therefore, the first embodiment of the utility model for improving the clip 2 is to set a vertical slot 206 between the vertical portion 201 of the clip 2 and the core 1, so that the flowing heat dissipation medium can be closer to the side of the core 1 to achieve rapid heat dissipation of the core 1.

[0027] Specifically, refer to Figure 3 and Figure 4 , the first embodiment of the clip 2 of the utility model is further described in detail, specifically, there are multiple slots 206, and the multiple slots 206 are evenly spaced and linearly arranged on the vertical portion 201, and a support rib 208 is formed between two adjacent slots 206. The support rib 208 can prevent the thin-walled area 207 from being deformed by pressure, ensuring that the slot 206 maintains its inherent shape, wherein the cross-sectional shape of the slot 206 can be circular, square, polygonal or other shapes.

[0028] refer to Figure 5 , Figure 6 and Figure 8 , which is the second embodiment of the utility model, is improved on the basis of the first embodiment of the utility model. Specifically, a fracture portion 209 is opened on the thin-walled area 207, so that the slot hole 206 is directly connected to the side wall of the core 1, thereby enabling the heat dissipation medium to directly contact the core 1 and take away the heat of the core 1. It can mainly reduce the coverage area of ​​the side of the core 1 by the clip 2, so that the heat dissipation medium can directly contact the core 1, increase the heat dissipation effect of the core 1, and not only increase the heat dissipation area of ​​the core 1, but also increase the heat dissipation area of ​​the clip 2.

[0029] refer to Figure 7 , which is the third embodiment of the utility model, and the improvement of the clip 2 is different from the first and second embodiments mentioned above in that the slot 206 passes through the vertical portion 201 horizontally, that is, it is arranged to pass through the surface of the vertical portion 201 vertically. Through this arrangement, the coverage area of ​​the clip 2 on the iron core 1 can also be reduced, so that the contact area between the clip 2 and the iron core 1 and the heat dissipation medium becomes larger, thereby increasing the heat dissipation effect.

[0030] In summary, the above three embodiments each have their own advantages and disadvantages. The advantage of the first embodiment is that it is attached to the iron core 1, and the contact is still in a plane during the clamping process of the iron core 1, and the contact surface between the iron core 1 and the clip 2 will not be deformed or dented due to excessive pressure. However, although it has a better heat dissipation effect than the existing clip 2, that is, the heat dissipation medium is closer to the covered side of the iron core 1, it still needs a thin-walled area 207 for heat transfer, and the heat dissipation efficiency is still lower than that of the second and third embodiments. In addition, since the vertical portion 201 of the clip 2 is often not thick, the processing accuracy of the vertically opened slot 206 is high, so the cost is also high. The advantage of the second embodiment over the first embodiment is that it sets a fracture portion 209, which can make the heat dissipation medium inside the slot 206 directly contact the side of the iron core 1, the heat dissipation effect is better, and the contact area between the iron core 1 and the vertical portion 201 and the heat dissipation medium is increased. However, it has a defect that when the clamping pressure of the clip 2 on the iron core 1 is large, the fracture portion The existence of 209 results in a non-complete plane contact between the clip 2 and the side of the core 1. Therefore, the existence of the fracture portion 209 is likely to cause an indentation on the side of the core 1 when the clamping force of the clip 2 is large. In addition, the slot 206 of the second embodiment is also vertically opened to penetrate the vertical portion 201, and its processing accuracy is also high, and its cost is also high. Compared with the first and second embodiments, the third embodiment has the advantages that the processing operation is relatively simple and its heat dissipation effect can also be guaranteed. However, it also has disadvantages. For the oil-immersed transformer, the oil used for heat dissipation will move upward when heated. Since the slot 206 of the third embodiment is not vertically arranged, it lacks guidance for the oil. In the first and second embodiments, the oil will move upward and leave the slot 206 when heated, and the colder oil will re-enter the slot 206 to form a guided movement. However, in the third embodiment, the upward moving oil has poor guidance. The hotter oil moving upward will be affected by the horizontal portion 202 of the clamp and accumulate near the clip 2, and the oil has poor guidance.

[0031] Furthermore, in the above three embodiments, since the slot 206 is provided in the vertical portion 201 of the clip 2, the rigidity of the vertical portion 201 is affected, and the transverse pull rod 3 acts on both ends of the clip 2. When the pulling force at both ends is large, it is most likely to cause deformation in the middle portion of the clip 2. Based on this situation, on the basis of the above three embodiments, reinforcing ribs 205 are added to the vertical portion 201 to increase the rigidity of the vertical portion 201.

[0032] Specifically, refer to Figure 3 and Figure 6 The reinforcing rib 205 can be arranged on the side of the vertical portion 201 away from the core 1. Figure 3The middle reinforcing ribs 205 are multiple plate-like bodies arranged horizontally along the length direction of the clip 2. The plate-like bodies and the clip 2 can be welded or integrally formed. Figure 6 In the figure, the reinforcing rib 205 is a plate-like body cross-arranged on the side of the vertical portion 201 away from the core 1. Of course, the reinforcing rib 205 can also be other shapes that can increase the bending rigidity of the clip 2, which will not be elaborated here.

[0033] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A transformer core assembly device, comprising a core (1), a coil (5) and a clamping plate assembly, wherein the clamping plate assembly comprises a clamping piece (2), a transverse tie rod (3) and a vertical tie rod (4), characterized in that: Four clips (2) are provided, wherein two of the clips (2) cooperate with the transverse pull rod (3) to clamp the upper part of the iron core (1), and the other two clips (2) cooperate with the transverse pull rod (3) to clamp the lower part of the iron core (1). The two clips (2) for clamping the upper part of the iron core (1) and the two clips (2) for clamping the lower part of the iron core (1) are connected via a vertical pull rod (4). The clip (2) comprises at least a vertical part (201) capable of being attached to the iron core (1) and a horizontal part (202) connected to the vertical part (201), and a slot (206) is provided on the vertical part (201).

2. A transformer core assembly device according to claim 1, characterized in that: The slot hole (206) vertically penetrates the vertical portion (201), and a thin-walled area (207) is formed on a side of the slot hole (206) close to the iron core (1).

3. A transformer core assembly device according to claim 2, characterized in that: There are a plurality of slot holes (206), and the plurality of slot holes (206) are evenly spaced and linearly arranged on the vertical portion (201), and a support rib (208) is formed between two adjacent slot holes (206).

4. A transformer core assembly device according to claim 2, characterized in that: A fracture portion (209) is provided on the thin-walled area (207) of the slot (206).

5. The transformer core assembly device according to claim 1, characterized in that: The slot (206) passes through the vertical portion (201) in a transverse direction.

6. The transformer core assembly device according to claim 1, characterized in that: A reinforcing rib (205) is also provided on the side of the vertical portion (201) away from the iron core (1).

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