Modular combined pad block and transformer adapted to a shell transformer

Abstract

The application discloses a modular combined cushion block suitable for a shell transformer and the transformer, and relates to the technical field of transformers. The cushion block body comprises a first heat dissipation support layer, a connecting interval layer and a second heat dissipation support layer which are fixed together through a buckle assembly, and the cushion block body is buckled with a transformer core and a winding through the buckle assembly. The first heat dissipation support layer and the second heat dissipation support layer are of the same structure, and the first heat dissipation support layer and the second heat dissipation support layer each comprise a connecting fixing part, a winding support part and a buckle matching part. The winding support part is provided with a heat dissipation structure, and the winding support part is internally provided with a reinforcing rib structure. The connecting interval layer is provided with a vacancy part for leading out winding taps. The application solves the technical problems of a large number of traditional cushion blocks, complicated installation, poor heat dissipation, and difficulty in separate replacement, and has the advantages of good insulation performance, high mechanical strength, good heat dissipation efficiency, and convenient installation and maintenance.

Description

Technical Field

[0001] This application relates to the field of transformer manufacturing technology, and in particular to a modular combination pad and transformer adapted to shell-type transformers. Background Technology

[0002] In shell-type transformers, spacers are critical insulating components placed between the core and windings, playing a vital role in supporting the windings, maintaining insulation distance, and providing heat dissipation channels. Traditional shell-type transformers typically employ a large number of small, quadrilateral spacers. For example, a 50kVA shell-type transformer may require over 1800 spacers.

[0003] Existing technologies suffer from the following drawbacks: First, the large number of spacers makes the installation process extremely cumbersome and inefficient, and the extensive use of bolts for fixing poses a risk of loosening. Second, when individual spacers age, break, or require maintenance during operation, replacement is extremely difficult, often requiring the disassembly of part or even the entire winding. This is not only time-consuming and labor-intensive but also highly susceptible to damaging intact winding insulation during disassembly, creating new safety hazards. Third, traditional spacers are mostly simple solid insulating blocks with limited heat dissipation performance, affecting the overall thermal management efficiency of the transformer. Finally, their mechanical strength is limited, making them prone to deformation under long-term electromagnetic and thermal stress, affecting support stability. Therefore, this invention proposes a modular combined spacer and transformer suitable for shell-type transformers. Summary of the Invention

[0004] This application provides a modular combination pad and transformer adapted to shell-type transformers, which can significantly reduce the number of installations, simplify the installation and replacement process, and at the same time have excellent mechanical strength and heat dissipation performance.

[0005] The first aspect of this application provides a modular combined pad adapted to a shell-type transformer, comprising: a pad body;

[0006] The pad body includes a first heat dissipation support layer, a connecting spacer layer and a second heat dissipation support layer arranged sequentially along the stacking direction.

[0007] The first heat dissipation support layer, the connecting spacer layer, and the second heat dissipation support layer are fixed together by a snap-fit ​​assembly;

[0008] The pad body is snapped into the transformer core and windings by the snap-fit ​​assembly;

[0009] The first heat dissipation support layer and the second heat dissipation support layer have the same structure, and both the first heat dissipation support layer and the second heat dissipation support layer include a connecting and fixing part, as well as a winding support part and a snap-fit ​​part disposed on the outer peripheral surface of the connecting and fixing part;

[0010] The number of winding support parts is multiple;

[0011] An oil passage is formed between each pair of adjacent winding support portions and between the snap-fit ​​portion and its adjacent winding support portion;

[0012] The winding support is provided with a heat dissipation structure;

[0013] The winding support section is provided with a reinforcing rib structure inside;

[0014] The buckle mating part is provided with a first connecting hole for mating with the buckle assembly;

[0015] The connecting spacer layer is provided with a gap for the winding tap to be led out;

[0016] The connecting spacer layer has a second connecting hole for cooperating with the buckle assembly.

[0017] Optionally, both the first heat dissipation support layer and the second heat dissipation support layer are formed by symmetrically splicing two first insulating components from top to bottom.

[0018] Optionally, the connecting spacer layer is formed by symmetrically splicing two second insulating components from left to right.

[0019] Optionally, the second insulating component has a C-shaped structure;

[0020] The two second insulating components are joined together by the snap-fit ​​assembly.

[0021] Optionally, both the first insulating component and the second insulating component are integrally molded from glass fiber reinforced epoxy resin composite material.

[0022] Optionally, the heat dissipation structure is a plurality of heat dissipation grooves uniformly formed on the outer surface of the winding support.

[0023] Optionally, the heat dissipation groove is an elongated groove.

[0024] Optionally, the reinforcing rib structure includes transverse reinforcing ribs and longitudinal reinforcing ribs;

[0025] The transverse reinforcing ribs are distributed intersectingly with the longitudinal reinforcing ribs.

[0026] Optionally, the buckle assembly includes a first buckle and a second buckle that are interlocked with each other;

[0027] The first and second fasteners engage with the limiting slots on the transformer core and winding, respectively.

[0028] A second aspect of this application provides a transformer comprising: a transformer core, windings, and the aforementioned modular combination pads adapted to a shell-type transformer.

[0029] As can be seen from the above technical solutions, the embodiments of this application have the following advantages: This modular combined pad, adapted to shell-type transformers, innovatively integrates the traditionally numerous, dispersed small pads into a modular combined pad consisting of a first heat dissipation support layer, a connecting spacer layer, and a second heat dissipation support layer, fixed by snap-fit ​​assemblies. This fundamentally solves the problem of numerous installation parts and cumbersome procedures. The multiple winding support parts, connecting fixing parts, and oil passages formed between them on the heat dissipation support layer, combined with the heat dissipation structure and internal reinforcing rib structure on the winding support parts, significantly reduce the number of parts while ensuring the overall mechanical strength and support stability of the pad. Furthermore, the optimized oil flow channels greatly improve heat dissipation efficiency. More importantly, the entire modular structure is connected to the transformer core and windings using snap-fit ​​connections, making the installation and disassembly of the pad extremely quick. When maintenance or replacement is required, it is not necessary to disassemble the entire winding as in the traditional method, thereby significantly reducing operational difficulty, maintenance costs, and the risk of accidental damage to the windings. This achieves a comprehensive technical effect of efficient installation, convenient maintenance, excellent heat dissipation, and a stable structure. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the modular combined pad block adapted to a shell-type transformer in the embodiments of this application;

[0031] Figure 2 This is a left view of a modular combination pad adapted to a shell-type transformer in an embodiment of this application.

[0032] Figure 3 This is a schematic diagram of the structure of the first heat dissipation support layer in the embodiments of this application;

[0033] Figure 4 This is a schematic diagram showing the distribution of the reinforcing ribs in the embodiments of this application;

[0034] Figure 5 This is a schematic diagram of the structure of the first insulating component in an embodiment of this application;

[0035] Figure 6 This is a schematic diagram of the structure of the connecting spacer layer in an embodiment of this application;

[0036] Figure 7 This is a schematic diagram of the structure of the second insulating component in an embodiment of this application;

[0037] Figure 8 This is a schematic diagram of the structure of the snap-fit ​​assembly in the embodiments of this application;

[0038] Figure 9 This is a schematic diagram of the structure of the first fastener in the embodiments of this application;

[0039] Figure 10 This is a schematic diagram of the structure of the second fastener in the embodiments of this application.

[0040] The attached figures are labeled as follows:

[0041] 1-First heat dissipation support layer, 11-Connecting and fixing part, 12-Winding support part, 121-Heat dissipation groove, 122-Reinforcing rib structure, 13-Snap-fit ​​part, 131-First connecting hole, 2-Connecting spacer layer, 21-Second insulating component, 22-Second connecting hole, 23-Third connecting hole, 3-Second heat dissipation support layer, 4-Snap-fit ​​assembly, 41-First snap-fit ​​component, 411-First connecting plate, 412-Snap-fit ​​part, 42-Second snap-fit ​​component, 421-Second connecting plate, 422-Snap-fit ​​groove, 5-Gap part. Detailed Implementation

[0042] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0043] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0045] This application provides an embodiment of a modular combined pad block adapted to a shell-type transformer; please refer to the following for details. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 as well as Figure 8 .

[0046] The modular combination pad for shell-type transformers in this embodiment includes: a pad body, which includes a first heat dissipation support layer 1, a connecting spacer layer 2, and a second heat dissipation support layer 3 arranged sequentially along the stacking direction. The first heat dissipation support layer 1, the connecting spacer layer 2, and the second heat dissipation support layer 3 are fixed together by a snap-fit ​​assembly 4. The pad body is snapped to the transformer core and windings by the snap-fit ​​assembly 4. The first heat dissipation support layer 1 and the second heat dissipation support layer 3 have the same structure, and both the first heat dissipation support layer 1 and the second heat dissipation support layer 3 include a connecting fixing part 11 and a winding provided on the outer peripheral surface of the connecting fixing part 11. The winding support part 12 and the snap-fit ​​part 13 are provided. There are multiple winding support parts 12. Oil passages are formed between each two adjacent winding support parts 12 and between the snap-fit ​​part 13 and its adjacent winding support parts 12. A heat dissipation structure is provided on the winding support part 12, and a reinforcing rib structure 122 is provided inside the winding support part 12. The snap-fit ​​part 13 is provided with a first connecting hole 131 for cooperating with the snap-fit ​​assembly 4. The connecting spacer layer 2 is provided with a gap 5 for the winding tap to be led out. The connecting spacer layer 2 is provided with a second connecting hole 22 for cooperating with the snap-fit ​​assembly 4.

[0047] It should be noted that this modular combined pad, adapted to shell-type transformers, innovatively integrates the traditionally numerous, dispersed small pads into a modular combined pad consisting of a first heat dissipation support layer 1, a connecting spacer layer 2, and a second heat dissipation support layer 3, fixed by snap-fit ​​assemblies 4. This fundamentally solves the problem of numerous installation parts and cumbersome procedures. The multiple winding support parts 12, connecting and fixing parts 11, and the oil passages formed between them on the heat dissipation support layer, combined with the heat dissipation structure and internal reinforcing rib structure 122 on the winding support parts 12, significantly reduce the number of parts while ensuring the overall mechanical strength and support stability of the pad. Furthermore, the optimized oil flow channels greatly improve heat dissipation efficiency. More importantly, the entire modular structure is connected to the transformer core and windings using snap-fit ​​connections, making the installation and removal of the pad extremely quick. When maintenance or replacement is required, it is not necessary to disassemble the entire winding as in the traditional method, thus greatly reducing operational difficulty, maintenance costs, and the risk of accidental damage to the windings. This achieves a comprehensive technical effect of efficient installation, convenient maintenance, excellent heat dissipation, and a stable structure.

[0048] The above is Embodiment 1 of a modular combined pad adapted to a shell-type transformer provided by this application. The following is Embodiment 2 of a modular combined pad adapted to a shell-type transformer provided by this application. Please refer to the following for details. Figures 1 to 10 .

[0049] The modular combination pad for shell-type transformers in this embodiment includes a pad body, which comprises a first heat dissipation support layer 1, a connecting spacer layer 2, and a second heat dissipation support layer 3 arranged sequentially along the stacking direction (i.e., perpendicular to the direction of the core laminations). In this embodiment, the pad body has a length of 205 mm, a width of 190 mm, and a thickness of 6 mm.

[0050] It should be noted that this three-layer structure design integrates multiple independent pads that are traditionally scattered into a single module, greatly reducing the number of parts and simplifying the assembly process.

[0051] The first heat dissipation support layer 1, the connecting spacer layer 2, and the second heat dissipation support layer 3 are fixed together by a snap-fit ​​assembly 4. Specifically, the snap-fit ​​assembly 4 is set through all three layers to achieve quick locking and unlocking without the need for traditional bolt connections, significantly improving assembly and disassembly efficiency. The pad body is snapped into the transformer core and windings by the same snap-fit ​​assembly 4, thereby achieving overall positioning and fixation of the pad in the transformer.

[0052] The first heat dissipation support layer 1 and the second heat dissipation support layer 3 have the same structure, and both the first heat dissipation support layer 1 and the second heat dissipation support layer 3 include a connecting and fixing part 11 and a winding support part 12 and a snap-fit ​​part 13 disposed on the outer peripheral surface of the connecting and fixing part 11.

[0053] Understandably, the connecting and fixing part 11 is mainly used to realize the structural connection between layers and with the transformer core; the winding support part 12 directly supports the winding coil and provides insulation and mechanical support; the snap-fit ​​part 13 is used to cooperate with the snap-fit ​​assembly 4.

[0054] There are multiple winding support parts 12; an oil passage is formed between each two adjacent winding support parts 12 and between the snap-fit ​​part 13 and its adjacent winding support part 12.

[0055] It should be noted that these oil passages are interconnected after the pads are installed, forming a network of channels for transformer oil flow, which effectively improves heat dissipation efficiency.

[0056] A heat dissipation structure is provided on the winding support portion 12. Specifically, the heat dissipation structure consists of multiple heat dissipation grooves 121 evenly distributed on the outer surface of the winding support portion 12 (i.e., the side facing the winding). More specifically, the heat dissipation grooves 121 are elongated grooves with a depth of 0.5 mm and a width of 5 mm, and the spacing between two adjacent heat dissipation grooves 121 is 17 mm. This design increases the heat dissipation area, providing a smooth flow channel for the transformer oil and accelerating heat dissipation; on the other hand, the reasonable groove spacing ensures that the pad base between the grooves retains sufficient support strength, can stably support the weight of the winding, and avoids a decrease in mechanical strength due to the grooves.

[0057] The winding support portion 12 is internally provided with a reinforcing rib structure 122. It is understood that this reinforcing rib structure 122 is used to enhance the rigidity of the winding support portion 12 and prevent it from deforming under long-term electromagnetic force and thermal stress. Specifically, the reinforcing rib structure 122 includes transverse reinforcing ribs and longitudinal reinforcing ribs, which are distributed intersectingly to form a grid-like support system. In this embodiment, each winding support portion 12 is provided with three transverse reinforcing ribs (located at 1 / 4, 1 / 2, and 3 / 4 of the length direction of the winding support portion 12, respectively) and two longitudinal reinforcing ribs (located at 1 / 3 and 2 / 3 of the width direction of the winding support portion 12, respectively).

[0058] The snap-fit ​​part 13 has a first connecting hole 131 for engaging with the snap-fit ​​assembly 4, and the connecting spacer layer 2 has a gap 5 for the winding tap to be led out. After the spacer block is assembled, the gap 5 forms a complete lead-out window. In addition, the connecting spacer layer 2 has a corresponding second connecting hole 22 for engaging with the snap-fit ​​assembly 4.

[0059] Preferably, both the first heat dissipation support layer 1 and the second heat dissipation support layer 3 are formed by symmetrically splicing two first insulating components vertically. The connecting spacer layer 2 is formed by symmetrically splicing two second insulating components 21 horizontally.

[0060] Understandably, this symmetrical splicing design facilitates mold manufacturing, component forming, and on-site assembly, which helps improve production efficiency and ensure assembly accuracy.

[0061] Specifically, the second insulating component 21 has a C-shaped structure, and two second insulating components 21 are spliced ​​together by a snap-fit ​​assembly 4. More specifically, the second insulating component 21 has a third connecting hole 23 for splicing, and the snap-fit ​​assembly 4 passes through the third connecting hole 23 to fix the two second insulating components 21 together, thereby forming a complete connecting spacer layer 2.

[0062] Both the first and second insulating components 21 are integrally molded from glass fiber reinforced epoxy resin composite material. It should be noted that this material possesses excellent electrical insulation properties, high mechanical strength, and good thermal stability, making it highly suitable for use in the internal environment of transformers.

[0063] The snap-fit ​​assembly 4 includes a first snap-fit ​​member 41 and a second snap-fit ​​member 42 that snap together. The first snap-fit ​​member 41 and the second snap-fit ​​member 42 respectively engage with the limiting grooves on the transformer core and windings, thereby achieving rapid installation and positioning of the entire pad. Specifically, the first snap-fit ​​member 41 includes a first connecting plate 411 and a snap-fit ​​part 412 provided on the first connecting plate 411, and the second snap-fit ​​member 42 includes a second connecting plate 421 and a snap-fit ​​groove 422 provided on the second connecting plate 421. The snap-fit ​​part 412 engages with the snap-fit ​​groove 422 to lock the first snap-fit ​​member 41 and the second snap-fit ​​member 42. The first connecting plate 411 and the second connecting plate 421 respectively engage with the limiting grooves on the transformer core and windings, thereby firmly installing the pad body in the transformer.

[0064] It should be noted that this modular combination pad, suitable for shell-type transformers, does not require bolts during installation, making it convenient and efficient. During transformer operation, the pad can stably perform the functions of support, insulation, and heat dissipation. When disassembling and maintaining, tools can be used to gently pry the snap-fit ​​assembly 4 at both ends of the pad to disengage it from the limiting groove on the transformer core and windings, allowing the pad to be removed for inspection or replacement.

[0065] This application also provides a transformer, which includes a transformer core, windings, and the aforementioned modular combination pads adapted to shell-type transformers. The windings and transformer core are respectively provided with limiting grooves that match the shapes of the first connecting plate 411 and the second connecting plate 421, ensuring that the snap-fit ​​assembly 4 can be accurately and securely engaged.

[0066] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A modular combination pad suitable for shell-type transformers, characterized in that, include: Pad body; The pad body includes a first heat dissipation support layer, a connecting spacer layer and a second heat dissipation support layer arranged sequentially along the stacking direction. The first heat dissipation support layer, the connecting spacer layer, and the second heat dissipation support layer are fixed together by a snap-fit ​​assembly; The pad body is snapped into the transformer core and windings by the snap-fit ​​assembly; The first heat dissipation support layer and the second heat dissipation support layer have the same structure, and both the first heat dissipation support layer and the second heat dissipation support layer include a connecting and fixing part, as well as a winding support part and a snap-fit ​​part disposed on the outer peripheral surface of the connecting and fixing part; The number of winding support parts is multiple; An oil passage is formed between each pair of adjacent winding support portions and between the snap-fit ​​portion and its adjacent winding support portion; The winding support is provided with a heat dissipation structure; The winding support section is provided with a reinforcing rib structure inside; The buckle mating part is provided with a first connecting hole for mating with the buckle assembly; The connecting spacer layer is provided with a gap for the winding tap to be led out; The connecting spacer layer is provided with a second connecting hole for cooperating with the buckle assembly.

2. The modular combination pad for shell-type transformers according to claim 1, characterized in that, Both the first heat dissipation support layer and the second heat dissipation support layer are composed of two first insulating components symmetrically spliced ​​together.

3. The modular combination pad for shell-type transformers according to claim 2, characterized in that, The connecting spacer layer is composed of two second insulating components symmetrically spliced ​​together.

4. The modular combination pad for shell-type transformers according to claim 3, characterized in that, The second insulating component has a C-shaped structure; The two second insulating components are joined together by the snap-fit ​​assembly.

5. The modular combination pad for shell-type transformers according to claim 3, characterized in that, Both the first insulating component and the second insulating component are integrally molded from glass fiber reinforced epoxy resin composite material.

6. The modular combination pad for shell-type transformers according to claim 1, characterized in that, The heat dissipation structure consists of multiple heat dissipation grooves evenly formed on the outer surface of the winding support.

7. The modular combination pad for shell-type transformers according to claim 6, characterized in that, The heat dissipation groove is a long strip-shaped groove.

8. The modular combination pad for shell-type transformers according to claim 1, characterized in that, The reinforcing rib structure includes transverse reinforcing ribs and longitudinal reinforcing ribs; The transverse reinforcing ribs are distributed intersectingly with the longitudinal reinforcing ribs.

9. The modular combination pad for shell-type transformers according to claim 1, characterized in that, The buckle assembly includes a first buckle and a second buckle that are interlocked with each other; The first and second fasteners engage with the limiting slots on the transformer core and winding, respectively.

10. A transformer, characterized in that, Includes: transformer core, windings, and modular combination pads adapted to shell-type transformers as described in any one of claims 1-9.

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