Coil presser and transformer

Abstract

The utility model discloses a coil pressing plate and transformer. The coil pressing plate is installed at the top end and bottom end of the coil winding, and it comprises two oppositely arranged end combination plates and two connecting combination plates. Among them, the end combination plate comprises a head end and a tail end, and the head end and the tail end are both provided with a first clamping strip; the two ends of the connecting combination plate are both provided with a first clamping groove, and the first clamping strip is clamped in the first clamping groove; the two connecting combination plates are parallel to each other, and the two ends of one connecting combination plate are respectively clamped with two head ends, and the two ends of the other connecting combination plate are respectively clamped with two tail ends; the end face of the coil winding is attached to at least part of the end combination plate and at least part of the connecting combination plate. Through the arrangement, if the coil pressing plate is locally damaged during the operation of the transformer, the maintenance personnel can only replace the damaged part, without the need to replace the whole coil pressing plate, thereby being favorable for reducing the maintenance cost of the transformer.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and in particular to a coil pressure plate and a transformer. Background Technology

[0002] The coil clamp is a key component in a transformer used to clamp the coil windings, applying axial force to the windings under the action of clamps. For some transformers equipped with coil clamps, the clamps need to be replaced after wear, increasing the transformer's maintenance costs. Utility Model Content

[0003] The main purpose of this utility model is to provide a coil pressure plate and a transformer, which aims to reduce the maintenance cost of transformers with coil pressure plates installed.

[0004] To achieve the above objectives, this utility model proposes a coil pressure plate, installed at the top and bottom ends of a coil winding, comprising: Two end combination plates are arranged opposite each other. Each end combination plate includes a head end and a tail end. Both the head end and the tail end are provided with a first retaining strip. Two connecting plates, each with a first slot at both ends, and a first clip engaging with the first slot; The two connecting plates are parallel to each other. The two ends of one connecting plate are respectively engaged with the two beginning ends, and the two ends of the other connecting plate are respectively engaged with the two end ends. The end face of the coil winding is in contact with at least part of the end plate and at least part of the connecting plate.

[0005] In one embodiment, the end assembly plate includes a first sub-plate and a second sub-plate, with the first end disposed at one end of the first sub-plate and the tail end disposed at the end of the second sub-plate away from the first sub-plate; The first sub-plate has a second slot at the end furthest from the head end, and the second sub-plate has a second strip at the end furthest from the tail end. The first sub-plate and the second sub-plate are engaged by the second strip and the second slot.

[0006] In one embodiment, the direction from the first end to the last end is defined as the first direction, the angle between the extension direction of the first card strip and the first direction is α, and the angle between the extension direction of the second card strip and the first direction is β. Then, α and β satisfy: 0°<α<180°, 0°<β<180°, and α≠90°.

[0007] In one embodiment, the connecting assembly plate includes a first splicing plate, a second splicing plate, and a third splicing plate, wherein the two ends of the second splicing plate are respectively provided with a third slot and a third clip; The first splicing plate has a first slot and a fourth slot at both ends, and the third splicing plate has a first slot and a fourth slot at both ends. The fourth slot is engaged with the third slot, and the third slot is engaged with the fourth slot.

[0008] In one embodiment, there are at least two first splicing plates and two second splicing plates, and the first splicing plates and the second splicing plates are arranged in a one-to-one correspondence, and the first slot can be engaged with the third slot strip.

[0009] In one embodiment, the projection shape of the connecting plate onto the end face of the coil winding is an isosceles trapezoid; Definition: The projections of the first splicing plate, the second splicing plate, and the third splicing plate onto the end face of the coil winding are respectively the first projection, the second projection, and the third projection; The shapes of the first projection, the second projection, and the third projection are all trapezoidal.

[0010] In one embodiment, the coil pressure plate further includes a tensioning assembly, which includes a base plate, a pull rod, and a threaded rod. There are two base plates and two threaded rods. The two base plates are respectively installed on opposite sides of the two connecting assembly plates. The base plate has a threaded through hole, and both ends of the pull rod have threaded blind holes. One end of the threaded rod passes through the threaded through hole and extends into the threaded blind hole. The threaded rod is threadedly engaged with both the threaded through hole and the threaded blind hole.

[0011] In one embodiment, both the end assembly plate and the connecting assembly plate are provided with positioning through holes, and the coil pressure plate also includes a positioning element, which passes through the positioning through hole and is connected to the coil winding.

[0012] In one embodiment, the coil pressure plate further includes a plurality of positioning blocks, which are installed on the side of the end assembly plate and the connecting assembly plate facing the coil winding, and the positioning blocks abut against the side wall of the coil winding.

[0013] The present invention also proposes a transformer, including a coil pressure plate as described in any of the above embodiments. The transformer further includes a clamp and a coil winding, with the clamp abutting against the side of the end assembly plate away from the coil winding.

[0014] According to the technical solution of this utility model, a coil pressure plate is installed at the top and bottom of the coil winding, comprising two end combination plates and two connecting combination plates arranged opposite each other. Each end combination plate includes a head end and a tail end, both of which are provided with a first retaining strip. Each end of the connecting combination plate has a first retaining groove, and the first retaining strip engages with the first retaining groove. The two connecting combination plates are parallel to each other, with one connecting combination plate engaging with the two head ends at both ends, and the other connecting combination plate engaging with the two tail ends at both ends. The end face of the coil winding is in contact with at least a portion of the end combination plates and at least a portion of the connecting combination plates. With this arrangement, the end combination plates and connecting combination plates can be joined together by the first retaining strip and the second retaining groove to form a ring-shaped coil pressure plate, allowing the coil pressure plate to be installed at the ends and bottom of the coil winding. When using this type of coil pressure plate, if the coil pressure plate is partially damaged during transformer operation, maintenance personnel can replace only the damaged part without replacing the entire coil pressure plate, thus reducing transformer maintenance costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a partial structural schematic diagram of an embodiment of the transformer provided by this utility model; Figure 2 A schematic diagram of the structure of the coil pressure plate provided by this utility model; Figure 3 for Figure 2 A schematic diagram of the decomposed structure; Figure 4 for Figure 3 A partial structural diagram; Figure 5 for Figure 3 A schematic diagram of the structure of another part; Figure 6 for Figure 5 A partial structural diagram; Figure 7 for Figure 2 Schematic diagram of the tensioning assembly; Figure 8 for Figure 2 A structural diagram from another perspective.

[0017] Explanation of icon numbers: 100. Coil pressure plate; 1. End assembly plate; 11. Head end; 12. Tail end; 13. First retaining strip; 14. First sub-plate; 141. Second retaining groove; 15. Second sub-plate; 151. Second retaining strip; 16. First base groove; 2. Connecting panel; 21. First slot; 22. First splicing panel; 221. Fourth slot strip; 23. Second splicing panel; 231. Third slot; 232. Third slot strip; 24. Third splicing panel; 241. Fourth slot; 25. Second base groove; 3. Tensioning assembly; 31. Base plate; 32. Pull rod; 321. Grip part; 322. Weight reduction groove; 33. Threaded rod; 4. Positioning through hole; 5. Positioning block; 200, coil winding; 300, clamp; 310, mounting hole; X, the first direction.

[0018] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] The coil clamping plate is a key component in the core structure of a transformer, used to fix and tighten the coil windings. It can replace the spacer blocks installed between the clamps and the coil windings, thereby increasing the uniformity of stress on the coil windings. Specifically, its main function is to use mechanical pressure to stably constrain the coil windings to the core or clamps and other supporting structures, preventing winding displacement, deformation, or loosening caused by electromagnetic vibration, thermal expansion and contraction, or external impacts, thus ensuring the transformer's electrical performance, insulation safety, and long-term operational stability.

[0023] According to the applicant's observations and research, although transformers equipped with coil pressure plates have advantages such as high stability and low noise, the clamps can only connect to a part of the coil pressure plates, resulting in uneven stress on the coil pressure plates themselves. During the operation of the transformer, in order to ensure the stability of the transformer operation, it is necessary to stop the machine periodically to replace the coil pressure plates. However, during the replacement of the coil pressure plates, the worn parts cannot be replaced separately, resulting in the replacement of the worn parts that are not clamped, thus wasting materials and increasing the maintenance cost of the transformer.

[0024] In view of this, the present invention proposes a coil pressure plate to solve or at least alleviate the above-mentioned problems.

[0025] Please see Figures 1 to 5In one embodiment of this utility model, the coil pressure plate 100 is installed at the top and bottom ends of the coil winding 200, and includes two end combination plates 1 and two connecting combination plates 2 arranged opposite to each other. The end combination plate 1 includes a head end 11 and a tail end 12, both of which are provided with a first retaining strip 13. The connecting combination plate 2 has a first retaining groove 21 at both ends, and the first retaining strip 13 is engaged with the first retaining groove 21. The two connecting combination plates 2 are parallel to each other, with one connecting combination plate 2 having its two ends engaged with the two head ends 11 respectively, and the other connecting combination plate 2 having its two ends engaged with the two tail ends 12 respectively. The end face of the coil winding 200 is in contact with at least a portion of the end combination plates 1 and at least a portion of the connecting combination plates 2.

[0026] Specifically, when installing the coil pressure plate 100 in this embodiment onto the transformer, the operator manually engages the end combination plate 1 and the connecting combination plate 2 using the first locking strip 13 and the first locking groove 21, so that the two end combination plates 1 and the two connecting combination plates 2 are alternately connected to form a ring structure, and the end combination plates 1 and the connecting combination plates 2 are located in the same plane parallel to the end face of the coil winding 200. After assembly, the coil pressure plate 100 is placed at the top and bottom ends of the coil winding 200, and a clamp 300 is installed on the side of the coil pressure plate 100 away from the coil winding 200, so that the clamp 300 presses the coil pressure plate 100 tightly.

[0027] In this embodiment, the end plate 1 is flat, but its surface is fan-shaped, making the coil pressure plate 100 have a semi-circular shape at both ends and a straight line in the middle. This matches the end face shape of the coil winding 200, thereby increasing the contact area between the coil pressure plate 100 and the coil winding 200 and making the coil winding 200 more evenly stressed. In other embodiments, the shape of the coil pressure plate 100 can be determined according to the end face shape of the coil winding 200.

[0028] In this embodiment, both the end assembly plate 1 and the connecting assembly plate 2 are made of electrical laminate wood. It has advantages such as good electrical insulation and high mechanical strength, and can be used for a long time in transformer oil. Furthermore, electrical laminate wood is easy to process and can adapt to the processing requirements of complex shapes in either the end assembly plate 1 or the connecting assembly plate 2.

[0029] According to the technical solution of this embodiment, the end combination plate 1 and the connecting combination plate 2 can be assembled by the first locking strip 13 and the second locking groove 141 to form a coil pressure plate 100 with an annular structure, so that the coil pressure plate 100 can be installed at the end of the coil winding 200. When using this coil pressure plate 100, if the coil pressure plate 100 is partially damaged during the operation of the transformer, the maintenance personnel can replace only the damaged end combination plate 1 or the connecting combination plate 2, without having to replace the entire coil pressure plate 100, thereby helping to reduce the maintenance cost of the transformer. In addition, the coil pressure plate 100 provided in this embodiment also needs to have good portability. The maintenance personnel can stack the end combination plate 1 and the connecting combination plate 2 separately for carrying, thereby improving the space utilization of the maintenance personnel's toolbox.

[0030] In one embodiment of this utility model, please refer to Figure 3 and Figure 4 The end assembly plate 1 includes a first sub-plate 14 and a second sub-plate 15. A starting end 11 is located at one end of the first sub-plate 14, and a trailing end 12 is located at the end of the second sub-plate 15 away from the first sub-plate 14. The end of the first sub-plate 14 away from the starting end 11 has a second slot 141, and the end of the second sub-plate 15 away from the trailing end 12 has a second locking strip 151. The first sub-plate 14 and the second sub-plate 15 are engaged via the second locking strip 151 and the second slot 141. This configuration splits the end assembly plate 1 into two sub-plates. If one sub-plate is damaged during transformer operation, only the damaged sub-plate needs to be replaced, further reducing transformer maintenance costs. Furthermore, the configuration of this embodiment further improves the portability of the coil pressure plate 100.

[0031] In one embodiment of this utility model, the direction from the head end 11 to the tail end 12 is denoted as the first direction X (see reference). Figure 2 (In the direction indicated by the middle arrow X), the angle between the extension direction of the first card strip 13 and the first direction X is α, and the angle between the extension direction of the second card strip 151 and the first direction X is β; then, α and β satisfy: 0°<α<180°, 0°<β<180°, and α≠90°. This arrangement makes the first card strip 13, the first card slot 21, the second card strip 151, and the second card slot 141 all inclined relative to the first direction X. This increases the length of the first card strip 13 and the first card slot 21 and the contact area between them, while also increasing the length of the second card strip 151 and the second card slot 141 and the contact area between them. This makes the connection between the first sub-plate 14 and the second sub-plate 15 and the connecting assembly plate 2 more stable and improves the connection stability between the first sub-plate 14 and the second sub-plate 15.

[0032] It should also be noted that, in this embodiment, the projection of the seam between the first sub-plate 14 and the connecting assembly plate 2 onto the end face of the coil winding 200 is called the first connecting seam projection, and the projection of the seam between the second sub-plate 15 and the connecting assembly plate 2 onto the end face of the coil winding 200 is called the second connecting seam projection. Thus, the first and second connecting seam projections are symmetrically arranged. This avoids the two seams being parallel to each other, preventing the end assembly plate 1 and the connecting assembly plate 2 from sliding and separating along the seam direction due to vibration after connection. Similarly, the seams of the first sub-plate 14 and the second sub-plate 15 in the two end connecting plates are not parallel to each other, preventing the coil pressure plate 100 from sliding and misaligning at the connection point of the first sub-plate 14 and the second sub-plate 15. This arrangement makes the coil pressure plate 100 more stable after assembly, which is beneficial to improving its working stability.

[0033] In one embodiment of this utility model, please refer to Figure 3 and Figure 5 The connecting assembly plate 2 includes a first splicing plate 22, a second splicing plate 23, and a third splicing plate 24. The second splicing plate 23 has a third slot 231 and a third locking strip 232 at both ends. The first splicing plate 22 has a first slot 21 and a fourth locking strip 221 at both ends. The third splicing plate 24 has a first slot 21 and a fourth slot 241 at both ends. The fourth locking strip 221 engages with the third slot 231, and the third locking strip 232 engages with the fourth slot 241. Through this embodiment, the connecting assembly plate 2 is composed of multiple splicing plates. Therefore, when one or more splicing plates in the connecting assembly plate 2 are damaged, only the corresponding splicing plate needs to be replaced; undamaged splicing plates do not need to be replaced, further reducing the transformer maintenance cost.

[0034] Furthermore, in one embodiment of this utility model, the number of the first splicing plate 22 and the second splicing plate 23 are both at least two, and the first splicing plate 22 and the second splicing plate 23 are arranged in a one-to-one correspondence. The first slot 21 can be engaged with the third slot strip 232. Let the first splicing plate 22 and the second splicing plate 23 be considered as one expansion assembly plate after being assembled. The number of expansion assembly plates can be adjusted according to the length of the end face of the coil winding 200 to change the length of the connecting assembly plate 2. Multiple expansion assembly plates can be connected sequentially through the first slot 21 and the third slot strip 232, and finally the second splicing plate 23 and the third splicing plate 24 are connected through the connection of the third slot strip 232 and the fourth slot 241. Through the solution of this embodiment, the scalability of the coil pressure plate 100 is improved, making it applicable to coil windings 200 of various sizes without the need for customizing new molds or replacing the entire coil pressure plate 100 of different sizes, thereby helping to reduce the production cost of the transformer.

[0035] In one embodiment of this utility model, please refer to Figure 3 , Figure 5 and Figure 6 The projection shape of the connecting plate 2 onto the end face of the coil winding 200 is an isosceles trapezoid. Defined as follows: the projections of the first splicing plate 22, the second splicing plate 23, and the third splicing plate 24 onto the end face of the coil winding 200 are the first projection, the second projection, and the third projection, respectively; the shapes of the first projection, the second projection, and the third projection are all trapezoidal. This arrangement ensures that the extension directions of the first locking strip 13 to the fourth locking strip 221 and the first locking groove 21 to the fourth locking groove 241 all have a certain angle with the first direction X. Furthermore, the trapezoidal splicing plate design allows the horizontal tensile or pushing force applied to the coil pressure plate 100 to be converted into frictional force and interlocking force between adjacent splicing plates and between the splicing plate and the sub-plate, thus giving the coil pressure plate 100 a self-locking function. This prevents the coil pressure plate 100 from loosening under long-term vibration or cold / heat contraction, which helps improve the stability of the coil pressure plate 100.

[0036] In one embodiment of this utility model, please refer to Figure 7 The coil pressure plate 100 also includes a tensioning assembly 3, which includes a base plate 31, a pull rod 32, and a threaded rod 33. There are two base plates 31 and two threaded rods 33. The two base plates 31 are respectively installed on opposite sides of the two connecting assembly plates 2. The base plate 31 has a threaded through hole, and both ends of the pull rod 32 have threaded blind holes. One end of the threaded rod 33 passes through the threaded through hole and extends into the threaded blind hole. The threaded rod 33 is threadedly engaged with both the threaded through hole and the threaded blind hole. The base plate 31 is connected to any splicing plate in the connecting assembly plate 2. For example, in this embodiment, the base plate 31 is threadedly connected, tenoned, or glued to the second splicing plate 23. After the end combination plate 1 and the connecting combination plate 2 are spliced ​​together, the pull rod 32 is placed between the two base plates 31, and the threaded rod 33 is passed through the threaded through hole and connected to the threaded blind hole. After the threaded rod 33 is stably connected to the threaded blind hole, the distance between the two base plates 31 can be adjusted by rotating the pull rod 32, thereby applying tension or thrust to the second splicing plate 23. Since each splicing plate is a trapezoidal plate, part of the thrust or tension can be converted into axial force between each splicing plate and each splicing plate and sub-plate, forcing each splicing plate and each sub-plate to fit together, thereby achieving the pre-tightening effect between the end combination plate 1 and the connecting combination plate 2, so as to further improve the stability of the coil pressure plate 100.

[0037] In this embodiment, a gripping part 321 is provided in the middle of the pull rod 32. The diameter of the gripping part 321 is larger than the diameter of other parts of the pull rod 32 to facilitate the operator to rotate the pull rod 32. An insulating sleeve is provided around the outer periphery of the gripping part 321. In addition, multiple weight-reducing grooves 322 are provided in the pull rod 32 to reduce the weight of the pull rod 32.

[0038] In one embodiment of this utility model, please refer to Figure 2Both the end plate 1 and the connecting plate 2 have positioning through holes 4. The coil pressure plate 100 also includes a positioning element (not shown in the figure), which passes through the positioning through hole 4 and is connected to the coil winding 200. The positioning element includes one of screws and positioning pins. The positioning element passes through the positioning through hole 4 and is anchored to the coil winding 200 to achieve positioning and fixation of the coil pressure plate 100, so as to prevent the coil pressure plate 100 from shifting during the use of the transformer.

[0039] In one embodiment of this utility model, please refer to Figure 8 The coil pressure plate 100 also includes multiple positioning blocks 5. The positioning blocks 5 are installed on the side of the end assembly plate 1 and the connecting assembly plate 2 facing the coil winding 200, and abut against the side wall of the coil winding 200. The multiple positioning blocks 5 enclose a positioning space, the shape of which is the same as the outer periphery of the coil winding 200, enabling the coil pressure plate 100 to be stably connected to the coil winding 200, further reducing displacement or wobbling of the coil pressure plate 100 relative to the coil winding 200. In this embodiment, the positioning blocks 5 are made of electrical laminated cardboard and are connected to the end assembly plate 1 and the connecting assembly plate 2 by adhesive bonding or tenon jointing.

[0040] In one embodiment of this utility model, please refer to Figure 4 and Figure 5 The first sub-plate 14 and the second sub-plate 15 each have a first base groove 16, and the first splicing plate 22, the second splicing plate 23 and the third splicing plate 24 each have a second base groove 25. By opening the first base groove 16 and the second base groove 25, it is beneficial to reduce the overall weight of the coil pressure plate 100.

[0041] This utility model also proposes a transformer, which includes a coil pressure plate 100. The specific structure of the coil pressure plate 100 is as described in the above embodiments. Since this transformer adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here. Please refer to [link to relevant documentation]. Figure 1 The transformer also includes a clamp 300 and a coil winding 200. The clamp 300 abuts against the side of the end assembly plate 1 away from the coil winding 200. The clamp 300 has a plurality of mounting holes 310 corresponding to the positioning through holes 4. The positioning element passes through the mounting holes 310 and the positioning through holes 4 and is anchored to the end of the coil winding 200 to prevent the position of the clamp 300 from shifting.

[0042] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A coil pressure plate, installed at the top and bottom ends of a coil winding, characterized in that, include: Two end combination plates arranged opposite to each other, each end combination plate including a head end and a tail end, and each head end and tail end are provided with a first retaining strip; Two connecting combination plates, each with a first slot at both ends, and the first clip engages with the first slot; The two connecting plates are parallel to each other, with one connecting plate having its two ends respectively engaged with the two beginning ends, and the other connecting plate having its two ends respectively engaged with the two end ends. The end face of the coil winding is in contact with at least a portion of the end plate and at least a portion of the connecting plate.

2. The coil pressure plate as described in claim 1, characterized in that, The end assembly plate includes a first sub-plate and a second sub-plate, the first end is disposed at one end of the first sub-plate, and the tail end is disposed at the end of the second sub-plate away from the first sub-plate; The first sub-plate has a second slot at the end away from the head end, and the second sub-plate has a second strip at the end away from the tail end. The first sub-plate and the second sub-plate are engaged by the second strip and the second slot.

3. The coil pressure plate as described in claim 2, characterized in that: the direction from the first end to the tail end is defined as the first direction, the angle between the extension direction of the first clip and the first direction is α, and the angle between the extension direction of the second clip and the first direction is β; Then, α and β satisfy: 0°<α<180°, 0°<β<180°, and α≠90°.

4. The coil pressure plate as described in claim 3, characterized in that, The connecting assembly plate includes a first splicing plate, a second splicing plate, and a third splicing plate. The two ends of the second splicing plate are respectively provided with a third slot and a third clip. The first splicing plate has a first slot and a fourth slot at both ends, and the third splicing plate has a first slot and a fourth slot at both ends, with the fourth slot engaging with the third slot.

5. The coil pressure plate as described in claim 4, characterized in that, The number of the first splicing plate and the second splicing plate is at least two, and the first splicing plate and the second splicing plate are arranged in a one-to-one correspondence. The first slot can be engaged with the third slot strip.

6. The coil pressure plate as described in claim 4, characterized in that, The projection shape of the connecting assembly plate onto the end face of the coil winding is an isosceles trapezoid. Definition: The projections of the first splicing plate, the second splicing plate, and the third splicing plate onto the end face of the coil winding are respectively the first projection, the second projection, and the third projection; The first projection, the second projection, and the third projection are all trapezoidal in shape.

7. The coil pressure plate as described in claim 6, characterized in that, The coil pressure plate also includes a tensioning assembly, which includes a base plate, a pull rod, and a threaded rod. There are two base plates and two threaded rods. The two base plates are respectively installed on opposite sides of the two connecting assembly plates. The base plate has a threaded through hole. Both ends of the pull rod have threaded blind holes. One end of the threaded rod passes through the threaded through hole and extends into the threaded blind hole. The threaded rod is threadedly engaged with both the threaded through hole and the threaded blind hole.

8. The coil pressure plate as described in claim 1, characterized in that, Both the end assembly plate and the connecting assembly plate are provided with positioning through holes. The coil pressure plate also includes a positioning element, which passes through the positioning through hole and is connected to the coil winding.

9. The coil pressure plate as described in claim 1, characterized in that, The coil pressure plate also includes a plurality of positioning blocks, which are installed on the side of the end assembly plate and the connecting assembly plate facing the coil winding, and the positioning blocks abut against the side wall of the coil winding.

10. A transformer, characterized in that, The transformer includes a coil pressure plate as described in any one of claims 1 to 9, and further includes a clamp and the coil winding, the clamp abutting against the end assembly plate on the side away from the coil winding.

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