A pallet for a power transformer and a power transformer
Patent Information
- Application Number
- CN202521970895.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-12
- Publication Date
- 2026-09-04
- Estimated Expiration
- 2035-09-12
AI Technical Summary
[0002]在常规的电力变压器中，电力变压器的线圈的出线端一般只能以基本竖直的方向从较小的出线开孔中穿过，当大螺旋调压线圈的出线端需要预先弯折时，由于出线端经弯折后尺寸变大，导致出线端的弯折段无法从托板的较小的出线开孔中正常穿过
[0027]First, when the lower lead-out end of the large spiral coil needs to be pre-bent, the pre-bent lead-out end can easily pass through the lead-out area of the tray without affecting the normal production process, and facilitates phase separation and assembly.
Smart Images
Figure CN224720687U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of power equipment technology. Specifically, this application relates to a support plate for a power transformer and a power transformer. Background Technology
[0002] In conventional power transformers, the output terminals of the transformer coils can generally only pass through a small output opening in a basically vertical direction. When the output terminals of the large spiral voltage regulating coil need to be bent in advance, the size of the output terminals increases after bending, causing the bent section of the output terminals to be unable to pass through the small output opening of the support plate normally.
[0003] Furthermore, in traditional transformer trays, the lack of sufficiently large outlet openings means that the lower outlet of the large helical coil can only be routed on the upper part of the tray in some cases. However, the insulation distance between the outlet section and the lower part of the coil is sometimes limited, and the space for bending the conductor is small. For power transformers with a strong oil cooling structure, there is also the issue of unsatisfactory oil sealing at the outlet. Utility Model Content
[0004] The present invention aims to provide a support plate for a power transformer, which allows the pre-bent lead ends of the coil to easily pass through the lead openings in the lead area of the support plate.
[0005] According to one aspect of the embodiments of this application, a support plate for a power transformer is provided. The support plate has opposite first and second surfaces. The first surface is used to support the coil of the power transformer, and the support plate has a central hole and a lead-out area. The lead-out end of the coil is capable of extending from the first surface through the lead-out area to the second surface. The lead-out end includes a downwardly extending section and a horizontally bent section connected to the downwardly extending section. In particular, the support plate includes: a main body extending circumferentially around the central hole; and a movable member arranged on the lead-out area. In the region, the movable component is connected to the main component and is movable relative to the main component, thereby having an initial position and an extended position. In the initial position, a first wire outlet is formed between the main component and the movable component, the size of which allows a downward extension of the wire end to pass through. In the extended position, a second wire outlet is formed between the main component and the movable component, the area of which is larger than that of the first wire outlet, to allow a horizontally bent section of the wire end to pass through the second wire outlet.
[0006] In this way, the tray of this invention allows the pre-bent lead end of the coil to easily pass through the lead-out area of the tray, fully ensuring the insulation distance between the lead end of the coil and the lower part of the coil, and enabling the large spiral coil to be assembled smoothly during the phase-separation assembly stage.
[0007] According to an exemplary embodiment of this application, the tray is annular in shape, and the movable member is configured to translate relative to the main body member in the radial direction of the tray, thereby translating from the initial position away from the central hole to the unfolded position, or translating from the unfolded position closer to the central hole to return to the initial position.
[0008] In this way, the pallet adopts a circular shape design, and the movable parts can be translated in the radial direction, which facilitates operation and improves assembly efficiency.
[0009] According to an exemplary embodiment of this application, the main body component includes an inner periphery and an outer periphery extending in the circumferential direction, the outer periphery of the main body component forming a first arc, and the movable component includes an inner periphery and an outer periphery extending in the circumferential direction, the outer periphery of the movable component forming a second arc, wherein, in the initial position, the first arc and the second arc are aligned to form a continuous arc, and in the unfolded position, the second arc protrudes outward relative to the first arc in the radial direction.
[0010] In this way, the first arc of the main component and the second arc of the movable component are aligned in the initial position, and the main component and the movable component are integrated into one, resulting in good mechanical strength and a beautiful and sturdy appearance.
[0011] According to an exemplary embodiment of this application, the main body component includes a first side and a second side extending between the inner periphery and the outer periphery of the main body component; the movable component includes a first side and a second side extending between the inner periphery and the outer periphery of the movable component; wherein the first side of the movable component has a guide rail portion in the form of a protrusion or a groove, and the first side of the main body component has a guide rail portion whose shape is complementary to the guide rail portion of the first side of the movable component, thereby the first side of the movable component is slidably disposed on the first side of the main body component; and wherein the second side of the movable component has a guide rail portion in the form of a protrusion or a groove, and the second side of the main body component has a guide rail portion whose shape is complementary to the guide rail portion of the second side of the movable component, thereby the second side of the movable component is slidably disposed on the second side of the main body component.
[0012] In this way, the main body and the movable parts have complementary guide rails, ensuring that the movable parts can move smoothly and enhancing the reliability of the pallet.
[0013] According to an exemplary embodiment of this application, the first side of the main body component is parallel to the second side of the main body component, and the first side of the movable component is parallel to the second side of the movable component.
[0014] In this way, the two sides of the main body are parallel to each other, and the two sides of the movable part are parallel to each other, which simplifies the manufacturing process of the pallet and ensures that the movable part can move smoothly and steadily.
[0015] According to an exemplary embodiment of this application, the tray further includes a locking device configured to lock the movable member to the main body member after the horizontally bent section of the cable outlet has passed through the second cable outlet opening in the unfolded position and the movable member has returned to the initial position.
[0016] In this way, the locking device ensures that the movable parts are fixed after operation, preventing undesirable movement of the movable parts during normal operation of the power transformer.
[0017] According to an exemplary embodiment of this application, the locking device includes: a first side locking hole of the main body component disposed on the first side of the main body component, a first side locking hole of the movable component disposed on the first side of the movable component, and a first locking pin, wherein the first side locking hole of the main body component and the first side locking hole of the movable component are aligned in the initial position and can be locked by the first locking pin; the locking device further includes: a second side locking hole of the main body component disposed on the second side of the main body component, a second side locking hole of the movable component disposed on the second side of the movable component, and a second locking pin, wherein the second side locking hole of the main body component and the second side locking hole of the movable component are aligned in the initial position and can be locked by the second locking pin.
[0018] In this way, the movable parts are precisely locked by the cooperation of the locking hole and the locking pin, and the operation is simple.
[0019] According to an exemplary embodiment of this application, the main body component includes, along the circumferential direction: a first segment connected to the movable component; a second segment arranged opposite to and spaced apart from the first segment; a third segment connected between the first segment and the second segment; and a fourth segment connected between the first segment and the second segment and arranged opposite to the third segment, wherein the first segment and the second segment both have a first thickness, and the third segment and the fourth segment both have a second thickness, the second thickness being less than the first thickness, such that a core clearance space is formed on the lower surface of the third segment and the lower surface of the fourth segment.
[0020] In this way, the different sections of the main components have different thicknesses, forming a core clearance space, reducing magnetic reluctance loss, and improving the heat dissipation and overall performance of the transformer.
[0021] According to an exemplary embodiment of this application, the movable part is made of a first insulating material having a first dielectric constant, and the main body part is made of a second insulating material having a second dielectric constant, wherein the first dielectric constant is greater than the second dielectric constant.
[0022] In this way, the movable parts and the main body are made of different materials, which makes the movable parts have a higher dielectric constant, improves the local electric field strength, and enhances electrical safety and insulation performance. At the same time, the main body can be made of relatively low-cost materials, eliminating the need to use expensive materials for the entire tray, thus saving costs.
[0023] According to an exemplary embodiment of this application, the main body component has a circumferentially extending arcuate groove for guiding the flow of cooling oil, and the movable component has a circumferentially extending arcuate groove for guiding the flow of cooling oil. When the movable component is in the initial position, the arcuate groove of the main body component and the arcuate groove of the movable component are aligned to form a continuous arcuate groove.
[0024] In this way, both the main body and the moving parts are designed with arc-shaped grooves to form a continuous cooling oil flow path, which optimizes the distribution of cooling oil and improves cooling efficiency. This design is particularly suitable for transformers with strong oil-guided cooling.
[0025] According to another aspect of the present invention, a power transformer is provided, the power transformer including a support plate for a power transformer as described in any of the above embodiments.
[0026] In summary, the support plate and power transformer of this utility model can achieve at least the following beneficial technical effects:
[0027] First, when the lower lead-out end of the large spiral coil needs to be pre-bent, the pre-bent lead-out end can easily pass through the lead-out area of the tray without affecting the normal production process, and facilitates phase separation and assembly.
[0028] Secondly, movable parts can be made of different materials than the main body to improve the local electric field strength in the outgoing area and ensure mechanical strength. This eliminates the need to use expensive materials for the entire tray, thus saving costs.
[0029] Third, the design of this utility model is applicable to the lower support plate of various types of transformer bodies, such as ONAF, ODAF, and short-circuit protection.
[0030] Fourth, when disassembling and repairing the transformer, the coil can be easily removed by simply pulling out the movable parts of the tray, and the tray can be reused when needed. Attached Figure Description
[0031] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:
[0032] Figure 1 This is a schematic perspective view of a portion of a power transformer according to an exemplary embodiment of this application.
[0033] Figure 2 This is a schematic perspective view of three trays of a power transformer according to an exemplary embodiment of this application.
[0034] Figure 3 This is a schematic top view of the main body component of the tray of a power transformer according to an exemplary embodiment of this application.
[0035] Figure 4 This is a schematic top view of the movable part of the tray of a power transformer according to an exemplary embodiment of this application.
[0036] Figure 5 This is a schematic front view of the movable part of the tray of a power transformer according to an exemplary embodiment of this application.
[0037] Figure 6 This is a schematic top view of the fourth section of the main body component of the tray of a power transformer according to an exemplary embodiment of this application.
[0038] Figure 7 This is a schematic diagram showing how the bent-out end of the coil of the power transformer of this application passes through the tray.
[0039] The reference numerals in the attached figures are as follows:
[0040] 100. Pallet
[0041] 110. Main components
[0042] 111. Peripheral area inside the main component
[0043] 112. The outer perimeter of the main components
[0044] 113. First side of the main component
[0045] 114. Second side of the main component
[0046] 115. First Section
[0047] 116. Second Section
[0048] 117. Third Section
[0049] 118. Section 4
[0050] 119. Arc-shaped groove of main component
[0051] 120. Movable parts
[0052] 121. Peripheral area of movable parts
[0053] 122. The outer perimeter of movable parts
[0054] 123. First side of the movable part
[0055] 124. Second side of movable part
[0056] 125. Guide rail section
[0057] 129. Arc-shaped groove of movable part
[0058] 130. First wire exit hole
[0059] 131. Second cable outlet opening
[0060] 140. Locking hole on the first side of the movable part
[0061] 141. Locking hole on the second side of the movable part
[0062] 150. Center Hole
[0063] 160. Technological Characteristics
[0064] 200. Coil
[0065] 210. Outgoing cable end
[0066] 211. Downward extension segment
[0067] 212. Horizontal bending section
[0068] 220. Wire Tie
[0069] 300, Iron Core
[0070] 400. Supporting wooden blocks Detailed Implementation
[0071] 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 a part of the embodiments of the present application, and not all of them. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without inventive effort should fall within the scope of protection of the present application. The nouns and pronouns referring to people in this patent application are not limited to specific genders.
[0072] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Furthermore, regarding the accompanying drawings, directional terms such as "top," "bottom," "inner," "outer," "upper," and "lower" are used with reference to the direction described in the drawings.
[0073] First, please refer to Figure 1 This illustration shows a schematic perspective view of a portion of a power transformer according to an exemplary embodiment of this application. The power transformer mainly includes components such as an iron core 300, a coil 200, a support plate 100 for supporting the coil 200, and multiple supporting wooden blocks 400 below the support plate 100. During the assembly of the power transformer, the assembly consisting of the coil 200 and the support plate 100 is fitted together onto the column of the iron core 300. This invention mainly addresses the improvement of the support plate 100 located at the bottom of the coil 200. The support plate 100 is designed as a pull-out type in the lead-out area to solve the problem that the prefabricated lead-out ends of the large spiral coil cannot be assembled in phases.
[0074] Reference Figure 1 and Figure 2 The support plate 100 has opposite first and second surfaces, the first surface being the upper surface and the second surface being the lower surface. The first surface is used to support the coil 200 of the power transformer, and the support plate 100 has a central hole 150 and a lead-out area. The lead-out end 210 of the coil 200 can extend from the first surface through the lead-out area to the second surface for connection with other electrical components.
[0075] Reference Figure 1 and Figure 2The tray 100 includes: a main body 110 extending in a circumferential direction around a central hole 150; and a movable member 120 arranged in the cable outlet area, the movable member 120 being connected to the main body 110 and movable relative to the main body 110, thereby having an initial position and an unfolded position.
[0076] Reference Figure 2 On the left and middle support plate 100, in the initial position, a first wire outlet opening 130 is formed between the main body component 110 and the movable component 120. The size of the first wire outlet opening 130 allows the downward extension section 211 of the wire outlet end of the coil 200 to pass through. (This can be referenced simultaneously.) Figure 7 In contrast, refer to Figure 2 On the right side of the tray 100, the movable part 120 is in the unfolded position. A second wire outlet opening 131 is formed between the main body part 110 and the movable part 120. The area of the second wire outlet opening 131 is larger than the area of the first wire outlet opening 130, so as to allow the horizontally bent section 212 of the wire outlet end of the coil 200 to pass through the second wire outlet opening 131.
[0077] To more easily understand the solution of this utility model, please refer to... Figure 7 This illustrates how the bent lead end 210 of the coil passes through the tray 100. Figure 7 The diagram shows a schematic cross-sectional view of a portion of the coil's output end 210. Figure 7 As can be seen, the downward extension 211 of the lead-out end 210 of coil 200 passes through the lead-out area of tray 100, while the horizontal bend 212 of the lead-out end of coil 200 is located below the lower surface of tray 100. Obviously, the size of the horizontal bend 212 of the lead-out end of coil 200 is much larger than the size of the downward extension 211. Therefore, in the unfolded position of the movable part, the area of the second lead-out opening 131 is large enough to allow the horizontal bend 212 of the lead-out end of coil 200 to fall below the lower surface of tray 100. Otherwise, the horizontal bend 212 of the lead-out end of coil 200 cannot pass through the lead-out opening in the lead-out area of tray 100.
[0078] Reference Figure 2 The tray 100 is in the shape of an annulus, and the movable part 120 is configured to be able to translate relative to the main body part 110 in the radial direction of the tray 100, so that it can translate from the initial position away from the central hole 150 to the unfolded position, or translate from the unfolded position close to the central hole 150 to return to the initial position.
[0079] Reference Figure 2The main body component 110 includes an inner periphery 111 and an outer periphery 112 extending in the circumferential direction. The outer periphery 112 forms a first arc. The movable component 120 includes an inner periphery 121 and an outer periphery 122 extending in the circumferential direction. The outer periphery 122 forms a second arc. In the initial position, the first and second arcs are aligned to form a continuous arc, such as... Figure 2 The state of the left and middle trays 100. In contrast, as... Figure 2 The right-side support plate 100 is in the state where, when the movable part 120 is in the unfolded position, the second arc protrudes outward in the radial direction relative to the first arc.
[0080] Reference Figure 2 and Figure 3 The main body component 110 includes a first side 113 and a second side 114 extending between an inner periphery 111 and an outer periphery 112 of the main body component. (See reference...) Figure 4 The movable member 120 includes a first side 123 and a second side 124 extending between an inner periphery 121 and an outer periphery 122 of the movable member. (See reference...) Figure 5 The movable part 123 has a guide rail portion 125 in the form of a protrusion or a groove, see reference. Figure 3 The first side 113 of the main body component has a guide rail portion whose shape is complementary to the guide rail portion of the first side 123 of the movable component, thereby allowing the first side 123 of the movable component to be slidably disposed on the first side 113 of the main body component. Furthermore, referring to… Figure 5 The movable part 124 has a guide rail portion in the form of a protrusion or a groove, and refers to Figure 3 The second side 114 of the main body component has a guide rail portion whose shape is complementary to that of the guide rail portion of the second side 124 of the movable component, thereby allowing the second side 124 of the movable component to be slidably disposed on the second side 114 of the main body component. The first side 113 of the main body component may be parallel to the second side 114 of the main body component, and the first side 123 of the movable component may be parallel to the second side 124 of the movable component.
[0081] The tray 100 also includes a locking device configured to lock the movable member 120 to the main body 110 after the horizontally bent section of the lead end 210 of the coil 200 passes through the second lead opening 131 in the unfolded position and the movable member 120 returns to the initial position. Specifically, the locking device may include: a first side locking hole of the main body 113, a first side locking hole 140 of the movable member 123, and a first locking pin, wherein the first side locking hole of the main body 113 and the first side locking hole 140 of the movable member 123 are aligned in the initial position and can be locked by the first locking pin; the locking device also includes: a second side locking hole of the main body 114, a second side locking hole 141 of the movable member 124, and a second locking pin, wherein the second side locking hole of the main body 114 and the second side locking hole 141 of the movable member 124 are aligned in the initial position and can be locked by the second locking pin. Although the locking device in this embodiment is a specific example of a locking hole and a locking pin engaging, it is understood that those skilled in the art can also use other examples, such as clamp locking.
[0082] Reference Figure 3 The main component 110 includes, along the circumferential direction: a first section 115 connected to the movable component 120; a second section 116 arranged opposite to and spaced apart from the first section 115; a third section 117 connected between the first section 115 and the second section 116; and a fourth section 118 connected between the first section 115 and the second section 116 and arranged opposite to the third section 117. The first section 115 and the second section 116 both have a first thickness, and the third section 117 and the fourth section 118 both have a second thickness, which is less than the first thickness, thus forming a core clearance space on the lower surface of the third section 117 and the lower surface of the fourth section 118. (Refer to...) Figure 1 It can be seen that a section of the iron core 300 passes under the lower surface of the third section 117 and the lower surface of the fourth section 118.
[0083] The movable part 120 and the main body part 110 can be made of different materials. For example, the movable part 120 can be made of a first insulating material having a first dielectric constant, and the main body part 110 can be made of a second insulating material having a second dielectric constant, the first dielectric constant being greater than the second dielectric constant. For example, the first dielectric constant can be 4.1, and the second dielectric constant can be 3.7. The movable part 120 and the main body part 110 can typically be made of laminated wood or laminated paperboard. The laminated paperboard can be paperboard laminated with casein glue or paperboard laminated with polyester resin. Compared to the main body part 110, the movable part 120 can be made of materials with better mechanical and electrical properties.
[0084] See Figure 2 The main body component 110 has a circumferential arcuate groove 119 for guiding the flow of cooling oil, and the movable component 120 has a circumferential arcuate groove 129 for guiding the flow of cooling oil. When the movable component 120 is in the initial position, the main body arcuate groove 119 and the movable component arcuate groove 129 are aligned to form a continuous arcuate groove. Figure 2 This type of arc-shaped groove configuration is particularly suitable for transformers with strong oil-guided cooling.
[0085] In addition, refer to Figure 4 The illustration shows process features 160, including, for example, process slots and process holes. These process features are manufactured according to factors such as the process requirements of transformer manufacturing. Those skilled in the art know how these process features 160 can be adaptively designed according to specific transformer types and different pallet materials, etc. Therefore, they are not specifically described in this application to avoid obscuring the purpose of this application.
[0086] The power transformer of this utility model includes a support plate as described in detail above, in Figure 1 The transformer includes three support plates 100. In summary, the support plate for supporting the coil of this utility model adopts a pull-out movable part, which allows the bent lead end of the coil to easily pass through the lead-out area, fully ensuring the insulation distance between the lead end of the coil and the lower part of the coil. Moreover, the movable part of the support plate is integrated with the main body, which has good mechanical strength and is aesthetically pleasing and sturdy.
[0087] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered to fall within the protection scope of this application.
Claims
1. A support plate for a power transformer, the support plate (100) having opposite first and second surfaces, the first surface for supporting a coil (200) of the power transformer, and the support plate (100) having a central hole (150) and a lead-out area, the lead-out end (210) of the coil (200) being able to extend from the first surface through the lead-out area to the second surface, the lead-out end (210) comprising a downwardly extending section (211) and a horizontally bent section (212) connected to the downwardly extending section (211), characterized in that, The tray (100) includes: The main body component (110) extends circumferentially around the central hole (150); and A movable component (120) is arranged in the cable outlet area. The movable component (120) is connected to the main component (110) and is movable relative to the main component (110). The movable component (120) has an initial position and an extended position. In the initial position, a first cable outlet opening (130) is formed between the main component (110) and the movable component (120). The size of the first cable outlet opening (130) allows a downward extension (211) of the cable outlet end (210) to pass through. In the extended position, a second cable outlet opening (131) is formed between the main component (110) and the movable component (120). The area of the second cable outlet opening (131) is larger than the area of the first cable outlet opening (130) to allow a horizontal bend (212) of the cable outlet end (210) to pass through the second cable outlet opening (131).
2. The support plate for a power transformer according to claim 1, characterized in that, The tray (100) is annular in shape, and the movable member (120) is configured to translate relative to the main body member (110) in the radial direction of the tray (100), thereby translating from the initial position away from the central hole (150) to the unfolded position, or translating from the unfolded position close to the central hole (150) to return to the initial position.
3. The support plate for a power transformer according to claim 2, characterized in that, The main body component (110) includes an inner periphery (111) extending in the circumferential direction and an outer periphery (112) extending in the circumferential direction. The outer periphery (112) is in the shape of a first arc. The movable component (120) includes an inner periphery (121) and an outer periphery (122) extending in the circumferential direction, the outer periphery (122) being in the shape of a second arc. In the initial position, the first arc and the second arc are aligned to form a continuous arc, while in the unfolded position, the second arc protrudes outward relative to the first arc in the radial direction.
4. The support plate for a power transformer according to claim 3, characterized in that, The main body component (110) includes a first side (113) and a second side (114) of the main body component extending between the inner periphery (111) and the outer periphery (112) of the main body component; The movable component (120) includes a first side (123) and a second side (124) of the movable component extending between the inner periphery (121) and the outer periphery (122) of the movable component; The movable component's first side (123) has a protruding or recessed guide rail portion (125), and the main body component's first side (113) has a guide rail portion whose shape is complementary to the guide rail portion of the movable component's first side (123), thereby allowing the movable component's first side (123) to be slidably disposed on the main body component's first side (113). Furthermore, the movable member second side (124) has a guide rail portion in the form of a protrusion or a groove, and the main body member second side (114) has a guide rail portion whose shape is complementary to that of the guide rail portion of the movable member second side (124), thereby the movable member second side (124) can be slidably disposed on the main body member second side (114).
5. The support plate for a power transformer according to claim 4, characterized in that, The first side (113) of the main body component is parallel to the second side (114) of the main body component, and the first side (123) of the movable component is parallel to the second side (124) of the movable component.
6. The support plate for a power transformer according to claim 4, characterized in that, The tray (100) also includes a locking device configured to lock the movable member (120) to the main body member (110) after the horizontal bend (212) of the cable outlet (210) has passed through the second cable outlet opening (131) in the unfolded position and the movable member (120) has returned to the initial position.
7. The support plate for a power transformer according to claim 6, characterized in that, The locking device includes: a first side locking hole of the main body component provided on the first side (113) of the main body component, a first side locking hole (140) of the movable component provided on the first side (123) of the movable component, and a first locking pin, wherein the first side locking hole of the main body component and the first side locking hole (140) of the movable component are aligned in the initial position and can be locked by the first locking pin; The locking device further includes: a second side locking hole of the main body component on the second side (114) of the main body component, a second side locking hole (141) of the movable component on the second side (124) of the movable component, and a second locking pin, wherein the second side locking hole of the main body component and the second side locking hole (141) of the movable component are aligned in the initial position and can be locked by the second locking pin.
8. The support plate for a power transformer according to claim 1, characterized in that, The main body component (110) includes, along the circumferential direction: The first section (115) is connected to the movable part (120); The second section (116) is arranged opposite to the first section (115) and spaced apart from the first section (115); The third section (117) is connected between the first section (115) and the second section (116); The fourth segment (118) connects the first segment (115) and the second segment (116) and is arranged opposite to the third segment (117). Wherein, the first section (115) and the second section (116) are both of the first thickness, and the third section (117) and the fourth section (118) are both of the second thickness, the second thickness being less than the first thickness, so that a core clearance space is formed on the lower surface of the third section (117) and the lower surface of the fourth section (118).
9. The support plate for a power transformer according to any one of claims 1 to 8, characterized in that, The movable part (120) is made of a first insulating material having a first dielectric constant, and the main body part (110) is made of a second insulating material having a second dielectric constant, wherein the first dielectric constant is greater than the second dielectric constant.
10. A support plate for a power transformer according to any one of claims 1 to 8, characterized in that, The main body component (110) has a circumferentially extending arcuate groove (119) for guiding the flow of cooling oil, and the movable component (120) has a circumferentially extending arcuate groove (129) for guiding the flow of cooling oil. When the movable component (120) is in the initial position, the arcuate groove (119) of the main body component and the arcuate groove (129) of the movable component are aligned to form a continuous arcuate groove.
11. A power transformer, characterized in that, The power transformer includes a support plate for the power transformer according to any one of claims 1 to 10.