Transformer coil pressurization apparatus

Abstract

The utility model provides transformer coil pressurizing equipment, include: lower tray subassembly has the support surface to the upper side, the support surface is suitable for supporting the lower end of the transformer coil of compression, draw the axis, draw the axis vertically arrangement, the lower end of draw the axis is fixedly installed in lower tray subassembly, and upper pressure plate subassembly, upper pressure plate subassembly is set on draw the axis, and upper pressure plate subassembly has the pressurizing surface to the lower side, and the pressurizing surface is suitable for leaning the upper end of transformer coil and can move along draw the axis vertically downward to carry out pressurizing operation to transformer coil, upper pressure plate subassembly includes mounting panel, pressurizing plate and drive arrangement, mounting panel is located the upper side of pressurizing plate and is configured to be able to be fixed relative to draw the axis, drive arrangement is installed in mounting panel and is configured to drive pressurizing plate moves in the vertical direction relative to draw the axis, and the lower surface of pressurizing plate constitutes the pressurizing surface. This transformer coil pressurizing equipment occupies small space, light in weight, convenient operation.

Description

Technical Field

[0001] This application relates to the field of transformer manufacturing technology. Specifically, this application relates to transformer coil pressurization equipment. Background Technology

[0002] In transformer factories, to control the height of transformer coils and ensure their reactance and short-circuit withstand capability, appropriate pressure needs to be applied to the coils based on calculations. Generally, transformer factories use four-column presses for this purpose. However, using a four-column press incurs high investment costs, inconvenient coil transport, and requires a large floor space, necessitating deep foundation excavation. Its fixed and inflexible location makes it unsuitable for compact factories.

[0003] Alternatively, a single-cylinder pull-down pressure plate device can be used to pressurize the transformer coil. This device has a single hydraulic cylinder that holds the pressure plate on the lower pressure plate. The piston rod pulls downward to pressurize the transformer coil. The hydraulic cylinder occupies space on the lower pressure plate, resulting in a large footprint. Furthermore, this type of pressure plate device requires a separate transfer pallet and a transfer vehicle for transport. Using a combination of pressure plate device and transfer pallet not only increases costs and makes transport cumbersome, but also poses safety risks during transport because there is no fixed connection between the pressure plate device and the transfer pallet. Utility Model Content

[0004] This application aims to provide an improved transformer coil pressurization device that occupies relatively little space, is relatively lightweight, is easy to operate, and improves safety during conversion.

[0005] According to one aspect of the embodiments of this application, a transformer coil pressurizing device is provided, comprising: a lower tray assembly having an upward-facing support surface adapted to support the lower end of a transformer coil to be compressed; a pull shaft arranged vertically, the lower end of the pull shaft being fixedly mounted on the lower tray assembly; and an upper pressure plate assembly sleeved on the pull shaft, the upper pressure plate assembly having a downward-facing pressurizing surface adapted to abut against the upper end of the transformer coil and capable of moving vertically downward along the pull shaft to pressurize the transformer coil; wherein, the upper pressure plate assembly includes a mounting plate, a pressure plate, and a driving device, the mounting plate being located above the pressure plate and configured to be fixed relative to the pull shaft, the driving device being mounted on the mounting plate and configured to drive the pressure plate to move vertically relative to the pull shaft, and the lower surface of the pressure plate constituting the pressurizing surface.

[0006] In this way, the drive unit is mounted on the mounting plate without occupying space on the pressurizing surface, thus increasing the space available for the transformer coil and reducing the overall space occupied by the transformer coil pressurizing equipment compared to existing technologies.

[0007] According to an exemplary embodiment of this application, the driving device includes a plurality of hydraulic cylinders; the mounting plate has a plurality of hydraulic cylinder mounting seats, each hydraulic cylinder mounting seat having a hydraulic cylinder mounting hole, the cylinder body of each hydraulic cylinder is mounted on the corresponding hydraulic cylinder mounting seat and located above the mounting plate, and the piston rod of each hydraulic cylinder passes through the corresponding hydraulic cylinder mounting hole to abut against and drive the pressure plate.

[0008] In this way, by distributing multiple hydraulic cylinders on the mounting plate, uniform drive of the pressure plate is ensured, improving the accuracy and stability of the pressurization operation, while consuming less power.

[0009] According to an exemplary embodiment of this application, the lower pallet assembly includes: a pallet body, the pallet body being a plate-like structure and extending horizontally, the upper surface of the pallet body forming the support surface; and two support legs, the two support legs being located below the pallet body and respectively fixedly connected to two opposite sides of the pallet body, such that the two support legs are arranged parallel and spaced apart, each support leg being elongated, the two short sides of the elongated shape extending vertically, and the two long sides of the elongated shape extending horizontally, wherein the pallet body and the two support legs together enclose a receiving space, the receiving space being adapted to accommodate an air cushion vehicle for transporting the transformer coil pressurization equipment.

[0010] In this way, by utilizing the integrated structure of the pallet body and the two supporting legs, the pallet body and the transfer pallet are combined into one, avoiding the risk of displacement and tipping of the pallet body and the transfer pallet as in the prior art.

[0011] According to an exemplary embodiment of this application, the main plane of the mounting plate and the main plane of the pressure plate are both circular. The diameter of the mounting plate is smaller than the diameter of the pressure plate. Multiple lifting points are provided in the outer peripheral region of the pressure plate protruding from the mounting plate, so that the mounting plate and the pressure plate can be lifted together by a lifting device. The upper pressure plate assembly further includes multiple screw assemblies that connect the mounting plate and the pressure plate relatively movably. Each screw assembly includes a double-ended screw and a spring sleeved on the double-ended screw. Each double-ended screw passes through the mounting plate and the pressure plate. The lower end of each double-ended screw is tightened to the pressure plate, and the upper end of each double-ended screw extends a distance from the upper surface of the mounting plate and is tightened with a nut. The distance corresponds to the vertical stroke of the pressure plate. The lower end of the spring abuts against the upper surface of the mounting plate, and the upper end of the spring abuts against the corresponding nut.

[0012] In this way, the mounting plate and the pressure plate are hoisted together, and the positioning accuracy between the mounting plate and the pressure plate is ensured during the hoisting process using a screw assembly.

[0013] According to an exemplary embodiment of this application, the pull shaft is provided with a plurality of slots, the plurality of slots being spaced apart from each other along the axial direction of the pull shaft, and each slot extending along the circumferential direction of the pull shaft; and the upper pressure plate assembly further includes a fixing device disposed on the mounting plate for fixing the mounting plate on the pull shaft, the fixing device being adapted to selectively engage with any one of the plurality of slots.

[0014] In this way, by setting a slot on the pull shaft and a fixing device on the mounting plate, the stability and safety of the equipment during operation are provided, while also facilitating the assembly and disassembly of the equipment and reducing maintenance costs.

[0015] According to an exemplary embodiment of this application, the fixing device includes: two retaining rings capable of closing relative to each other to engage with the retaining groove, or opening relative to each other to disengage from the retaining groove; two handles respectively connected to the two retaining rings to control the opening and closing of the two retaining rings, wherein the two handles have an open configuration that is far apart from each other and a closed configuration that is close to each other, wherein in the open configuration, the two retaining rings are disengaged from the retaining groove, and in the closed configuration, the two retaining rings are engaged with the retaining groove; and a limiting stop provided on the mounting plate for limiting the position of the two handles so that the two handles are held in the open configuration or the closed configuration.

[0016] In this way, the combination of the retaining ring and the handle design allows users to easily control the opening and closing of the fixing device, enhancing the user-friendliness of the equipment. At the same time, the setting of the limit stop ensures the stability of the handle during operation, improving the safety of the equipment during handling and pressurization.

[0017] According to an exemplary embodiment of this application, a plurality of hydraulic cylinders are distributed at equal angles around the center point of the mounting plate on a circumference; the plurality of hydraulic cylinders are divided into a first group of hydraulic cylinders and a second group of hydraulic cylinders, each of the first group of hydraulic cylinders and the second group of hydraulic cylinders including a plurality of hydraulic cylinders, wherein the driving device includes a main oil circuit for supplying hydraulic oil, the main oil circuit being divided into a first sub-oil circuit and a second sub-oil circuit by a first distributor, the first sub-oil circuit being divided into a plurality of branch oil circuits by a second distributor, and the second sub-oil circuit being divided into a plurality of branch oil circuits by another second distributor, the plurality of branch oil circuits originating from the first sub-oil circuit supplying oil to the first group of hydraulic cylinders, and the plurality of branch oil circuits originating from the second sub-oil circuit supplying oil to the second group of hydraulic cylinders.

[0018] In this way, by evenly distributing multiple hydraulic cylinders, the uniformity of force on the pressure plate is achieved, improving the stability and consistency of the pressurization effect. At the same time, a special oil circuit distribution system ensures the uniform distribution of oil pressure in each hydraulic cylinder, further improving the accuracy and efficiency of pressurization.

[0019] According to an exemplary embodiment of this application, the mounting plate includes: a mounting plate through hole located in the central region of the mounting plate for the pull shaft to pass through; an inner annular reinforcing rib formed around the mounting plate through hole; an outer annular reinforcing rib concentric with the inner annular reinforcing rib and located outside the inner annular reinforcing rib; a plurality of radial reinforcing ribs extending radially outward from the inner annular reinforcing rib and further extending radially outward after intersecting with the outer annular reinforcing rib; and a retaining ring support plate covering the inner annular reinforcing rib, the retaining ring support plate having a support plate through hole for the pull shaft to pass through and being fitted with a fixing device for fixing the mounting plate to the pull shaft.

[0020] In this way, by setting the inner annular reinforcing rib, the outer annular reinforcing rib, and the radial reinforcing rib on the mounting plate, the structural strength and rigidity of the mounting plate are significantly enhanced, while the setting of the retaining ring support plate further ensures the stability and reliability of the fixing device.

[0021] According to an exemplary embodiment of this application, the pressure plate includes: a pressure plate through hole located in the central region of the pressure plate for the pull shaft to pass through; an inner annular reinforcing rib formed around the pressure plate through hole; an outer annular reinforcing rib concentric with the inner annular reinforcing rib and located outside the inner annular reinforcing rib; a middle annular reinforcing rib concentric with the inner annular reinforcing rib and located between the inner and outer annular reinforcing ribs; a plurality of radial reinforcing ribs extending radially outward from the inner annular reinforcing rib and further extending radially outward after intersecting with the outer annular reinforcing rib; and a plurality of support blocks extending radially on both sides from the middle annular reinforcing rib, the plurality of support blocks being used to abut against a plurality of piston rods of a plurality of hydraulic cylinders to receive the pressurizing force from the plurality of piston rods.

[0022] In this way, the pressure plate's structural design employs multiple layers of annular reinforcing ribs, radial reinforcing ribs, and support blocks, which not only improves the structural strength of the pressure plate but also effectively disperses the pressure force, ensuring uniform pressure on the coil and reducing the risk of coil damage.

[0023] According to an exemplary embodiment of this application, each of the two support legs includes: a main board arranged vertically; a top plate and a bottom plate arranged horizontally and respectively mounted above and below the main board; a first end plate and a second end plate arranged vertically and respectively mounted at both ends of the main board and connected to the top plate and the bottom plate; and a plurality of reinforcing plates, each reinforcing plate connected between the top plate and the bottom plate and connected to the main board; wherein the first end plate and the second end plate each include a guide plate inclined from the main board in a direction away from the receiving space to guide the air cushion vehicle into and out of the receiving space.

[0024] In this way, the load-bearing capacity and stability of the lower pallet assembly are significantly enhanced, while the inclined guide plate facilitates the entry and exit of the air cushion vehicle, improving the convenience and safety of equipment transportation.

[0025] According to an exemplary embodiment of this application, the main plane of the tray body is rectangular, and the upper surface of the tray body has a plurality of annular, concentric flow-guiding grooves and a plurality of tray body overflow holes disposed at the flow-guiding grooves, wherein the plurality of flow-guiding grooves are used to guide the cooling medium to flow to the plurality of tray body overflow holes.

[0026] In this way, the tray body is provided with flow guiding grooves and overflow holes, which can effectively guide the flow of cooling medium, ensure that the transformer coil is cooled during the pressurization process, prevent the coil from being damaged due to excessive temperature, improve the heat dissipation performance of the equipment, and extend its service life.

[0027] In summary, the transformer coil pressurization device of this utility model achieves many beneficial technical effects, such as: small space occupation, light weight, low power consumption, easy operation and no safety risks. Attached Figure Description

[0028] 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:

[0029] Figure 1 This is a perspective view of a transformer coil pressurization device according to an exemplary embodiment of this application.

[0030] Figure 2 This is a perspective view of a transformer coil pressurization device according to an exemplary embodiment of this application, showing the connection with... Figure 1 Different angles are shown, and for clarity, some structures of the transformer coil pressurization device have been omitted.

[0031] Figure 3 A perspective schematic diagram of a transformer coil pressurization device according to an exemplary embodiment of this application shows a connection with... Figure 2 Different angles.

[0032] Figure 4 This is a perspective view of the upper pressure plate assembly of a transformer coil pressurization device according to an exemplary embodiment of this application.

[0033] Figure 5 This is a perspective view of the upper pressure plate assembly of a transformer coil pressurizing device according to an exemplary embodiment of this application, compared to... Figure 4 In contrast, hydraulic cylinders and related components are omitted, and the mounting plate and pressure plate are mainly shown.

[0034] Figure 6 This is a perspective view showing the pressure plate of a transformer coil pressurization device according to an exemplary embodiment of this application.

[0035] Figure 7 This is a perspective view showing a mounting plate of a transformer coil pressurization device according to an exemplary embodiment of this application.

[0036] Figure 8This is a perspective view showing a mounting plate of a transformer coil pressurization device according to an exemplary embodiment of this application, compared to Figure 7 The hydraulic cylinder is omitted from the view.

[0037] The reference numerals in the attached figures are as follows:

[0038] 100. Lower tray assembly

[0039] 110. Pallet body

[0040] 111. Supporting surface

[0041] 112. Flow guide groove

[0042] 113. Overflow hole of the tray body

[0043] 120. Supporting leg

[0044] 121. Motherboard

[0045] 122. Top Slab

[0046] 123. Base plate

[0047] 124. First end plate

[0048] 125. Second end plate

[0049] 126. Reinforcing plate

[0050] 127. Guide board

[0051] 128. Reinforced hanging board

[0052] 129. Nylon sheet

[0053] 200, pull shaft

[0054] 201. Card slot

[0055] 202. Pull shaft connecting seat

[0056] 203. Pin

[0057] 300. Upper pressure plate assembly

[0058] 310. Mounting plate

[0059] 311. Hydraulic cylinder mounting hole

[0060] 312. Hydraulic cylinder mounting base

[0061] 313. Snap ring support plate

[0062] 314. Overflow hole on mounting plate

[0063] 316. Through holes in the mounting plate

[0064] 317. Inner ring reinforcing rib of mounting plate

[0065] 318. Reinforcing ribs on the outer ring of the mounting plate

[0066] 319. Radial reinforcing ribs on mounting plate

[0067] 320. Pressure plate

[0068] 321. Pressurized surface

[0069] 322. Lifting Point

[0070] 323. Pressure plate through hole

[0071] 324. Inner ring reinforcing rib of pressure plate

[0072] 325. Outer circumferential reinforcing rib of pressure plate

[0073] 326. Circular reinforcing rib in the middle of the pressure plate

[0074] 327. Radial reinforcing ribs of the pressure plate

[0075] 328. Support block

[0076] 329. Overflow hole of pressure plate

[0077] 330. Drive unit

[0078] 331. Hydraulic cylinder

[0079] 332. First Distributor

[0080] 333, Second Distributor

[0081] 334. Hydraulic oil interface

[0082] 335. First distributor bracket

[0083] 336. Second distributor bracket

[0084] 337. First Sub-oil Circuit

[0085] 338. Second Sub-oil Circuit

[0086] 339. Branch oil circuit

[0087] 340. Screw assembly

[0088] 350. Fixing device

[0089] 351. Handle

[0090] 352. Limiting stop

[0091] 353. Snap ring section

[0092] 354. Snap ring baffle

[0093] 355. Fixed pressure plate Detailed Implementation

[0094] 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.

[0095] It should be noted that directional terms used in the specification of this application, such as up, down, inside, outside, etc., are all references to... Figure 1 The diagram illustrates the transformer coil pressurization device from a three-dimensional perspective, especially for circular structures. "Inner" refers to the direction closer to the center of the circle, while "outer" refers to the direction farther from the center of the circle.

[0096] First, please refer to Figure 1 This illustration shows a perspective view of a transformer coil pressurizing device according to an exemplary embodiment of this application. The transformer coil pressurizing device mainly includes a lower tray assembly 100, a pull shaft 200, and an upper pressure plate assembly 300. The lower tray assembly 100 has an upward-facing support surface 111 adapted to support the lower end of the transformer coil to be compressed. Figure 1 The transformer coil is not shown. The pull shaft 200 is arranged vertically, and its lower end is fixedly mounted to the lower tray assembly 100, as shown in the reference. Figure 2 It can be seen that the lower end of the pull shaft 200 is mounted on the pull shaft connecting seat 202 via the pin 203. (Refer to...) Figure 1 and Figure 2 The upper pressure plate assembly 300 is sleeved on the pull shaft 200, and the upper pressure plate assembly 300 has a downward-facing pressure surface 321. Figure 3 As shown, the pressure surface 321 is adapted to abut against the upper end of the transformer coil and can move vertically downward along the pull shaft 200 to apply pressure to the transformer coil.

[0097] Reference Figure 2The upper pressure plate assembly 300 includes a mounting plate 310, a pressure plate 320, and a drive device 330. The mounting plate 310 is located above the pressure plate 320 and is configured to be fixed relative to the pull shaft 200. The drive device 330 is mounted on the mounting plate 310 and is configured to drive the pressure plate 320 to move vertically relative to the pull shaft 200. The lower surface of the pressure plate 320 forms a pressure surface 321.

[0098] Reference Figure 4 The drive unit 330 includes multiple hydraulic cylinders 331, specifically six hydraulic cylinders. The mounting plate 310 has multiple hydraulic cylinder mounting seats 312 (see reference). Figure 8 Specifically, there are six hydraulic cylinder mounting seats. Each hydraulic cylinder mounting seat 312 has a hydraulic cylinder mounting hole 311 (see reference). Figure 8 Each hydraulic cylinder 331 has its cylinder body mounted on a corresponding hydraulic cylinder mounting base 312 and located above the mounting plate 310. The piston rod of each hydraulic cylinder 331 passes through a corresponding hydraulic cylinder mounting hole 311 to abut against and drive the pressure plate 320. Of course, the number of hydraulic cylinders can be other numbers depending on the specific application. In particular, the number of hydraulic cylinders can be even, such as two, four, eight, etc., thus enabling the hydraulic cylinders to be divided into two groups.

[0099] from Figure 4 It can be clearly seen that the six hydraulic cylinders 331 are evenly distributed at an angle around the center point of the mounting plate 310 on the mounting plate 310. The drive unit includes a main oil circuit for supplying hydraulic oil, wherein the main oil circuit is divided into a first sub-oil circuit 337 and a second sub-oil circuit 338 by a first distributor 332. The first sub-oil circuit 337 is divided into three branch oil circuits 339 by a second distributor 333, and the second sub-oil circuit 338 is divided into three branch oil circuits by another second distributor, thereby forming a total of six branch oil circuits. The six branch oil circuits are respectively connected to the hydraulic oil interface 334 of the six hydraulic cylinders 331. The second distributor 333 may be a hexagonal oil circuit block.

[0100] Reference Figure 2 and Figure 3The lower pallet assembly 100 includes an integrated pallet body 110 and two support legs. The pallet body 110 is a plate-like structure that extends horizontally, and its upper surface forms a support surface 111. Two support legs 120 are located below the pallet body 110 and are fixedly connected to two opposite sides of the pallet body 110, such that the two support legs 120 are arranged parallel and spaced apart. Each support leg 120 is elongated, with its two short sides extending vertically and its two long sides extending horizontally. The pallet body 110 and the two support legs 120 together enclose a receiving space suitable for accommodating an air cushion vehicle used for transferring transformer coil pressurization equipment.

[0101] Reference Figure 3 Each of the two support legs 120 includes: a main plate 121, arranged vertically; a top plate 122 and a bottom plate 123, arranged horizontally and respectively mounted above and below the main plate 121; a first end plate 124 and a second end plate 125, arranged vertically and respectively mounted at both ends of the main plate 121 and connected to the top plate 122 and the bottom plate 123; and a plurality of reinforcing plates 126, each reinforcing plate 126 connecting between the top plate 122 and the bottom plate 123 and connected to the main plate 121. Specifically, both the first end plate 124 and the second end plate 125 include a guide plate 127 inclined outward from the main plate 121 in a direction away from the receiving space to guide the air cushion vehicle into and out of the receiving space. Figure 3 As can be seen, each support leg 120 may also include a reinforcing hanging plate 128, which has holes for easy lifting. The base plate 123 may include two layers, with the bottom layer being a nylon plate 129.

[0102] Reference Figure 1 and Figure 2 The main plane of the mounting plate 310 and the main plane of the pressure plate 320 are both circular. The diameter of the mounting plate 310 is smaller than that of the pressure plate 320. Multiple lifting points 322 are provided in the outer peripheral area of ​​the pressure plate 320 that protrudes from the mounting plate 310. Lifting rings are suitable for installation at the lifting points 322 so that the mounting plate 310 and the pressure plate 320 can be lifted together by the lifting equipment.

[0103] Reference Figure 1 and Figure 2The upper pressure plate assembly 300 also includes a plurality of screw assemblies 340, such as four or six screw assemblies, that movably connect the mounting plate 310 and the pressure plate 320. Each screw assembly 340 includes a double-ended screw and a spring (not shown) fitted onto the double-ended screw. Each double-ended screw passes through the mounting plate 310 and the pressure plate 320. The lower end of each double-ended screw is tightened to the pressure plate 320, and the upper end of each double-ended screw extends a distance from the upper surface of the mounting plate 310 and is tightened with a nut. This distance corresponds to the vertical stroke of the pressure plate 320. The lower end of the spring abuts against the upper surface of the mounting plate 310, and the upper end of the spring abuts against the corresponding nut.

[0104] Reference Figure 1 The pull shaft 200 is provided with a plurality of slots 201, which are spaced apart from each other along the axial direction of the pull shaft 200. Each slot 201 extends along the circumferential direction of the pull shaft 200, for example, extending 360 degrees. The upper pressure plate assembly 300 also includes a fixing device 350 provided on the mounting plate 310 for fixing the mounting plate 310 on the pull shaft 200. The fixing device 350 is adapted to selectively engage with any one of the plurality of slots 201.

[0105] Reference Figure 4 The fixing device 350 may include: two retaining rings 353, capable of closing relative to each other to engage with the retaining groove 201, or opening relative to each other to disengage from the retaining groove 201; two handles 351, respectively connected to the two retaining rings 353 to control the opening and closing of the two retaining rings 353, wherein the two handles 351 have an open configuration that is far apart from each other and a closed configuration that is close to each other. In the open configuration, the two retaining rings 353 disengage from the corresponding retaining groove 201, while in the closed configuration, the two retaining rings 353 engage with the corresponding retaining groove 201; and a limiting stop 352, disposed on the mounting plate 310, for limiting the position of the two handles 351 so that the two handles 351 are held in the open or closed configuration. Figure 4 As can be seen, the limiting stop 352 includes four baffles. When the two handles 351 are engaged on the outside of the two outer baffles, they maintain an open configuration. When the two handles 351 are engaged on the inside of the two inner baffles, they maintain a closed configuration.

[0106] Reference Figure 5 , Figure 7 and Figure 8The mounting plate 310 may include: a mounting plate through-hole 316 located in the central region of the mounting plate 310 for the pull shaft 200 to pass through; an inner annular reinforcing rib 317 formed around the mounting plate through-hole 316 and extending upward; an outer annular reinforcing rib 318 concentric with the inner annular reinforcing rib 317, located outside the inner annular reinforcing rib 317 and extending upward; a plurality of radial reinforcing ribs 319 extending radially outward from the inner annular reinforcing rib 317 and further extending radially outward after intersecting with the outer annular reinforcing rib 318, and extending upward; and a retaining ring support plate 313 covering the inner annular reinforcing rib 317, the retaining ring support plate 313 having a support plate through-hole for the pull shaft 200 to pass through and being fitted with a fixing device 350 for fixing the mounting plate 310 to the pull shaft 200. Figure 4 As can be seen, a retaining ring baffle 354 is installed on the retaining ring support plate 313. The retaining ring baffle 354 has a retaining ring baffle through hole through which the pull shaft 200 passes. The retaining ring baffle 354 is used to limit the position of the retaining ring part 353 in the axial direction. A fixing plate 355 is also installed on the retaining ring support plate 313. The fixing plate 355 is used to fix the end of the extension part of the retaining ring part 353 that is opposite to the handle 351 to the retaining ring support plate 313.

[0107] Reference Figure 6 The pressure plate 320 may include: a pressure plate through hole 323 located in the central region of the pressure plate 320 for the pull shaft 200 to pass through; an inner annular reinforcing rib 324 formed around the pressure plate through hole 323 and extending upward; an outer annular reinforcing rib 325 concentric with the inner annular reinforcing rib 324, located outside the inner annular reinforcing rib 324, and extending upward; and a middle annular reinforcing rib 326 concentric with the inner annular reinforcing rib 324 and located between the inner annular reinforcing rib 324 and the inner annular reinforcing rib 325. The pressure plate has an outer annular reinforcing rib 325 between and extending upwards; multiple radial reinforcing ribs 327 extending radially outwards from the inner annular reinforcing rib 324 of the pressure plate and further extending radially outwards and upwards after intersecting with the outer annular reinforcing rib 325; and multiple support blocks 328 extending radially on both sides from the middle annular reinforcing rib 326 of the pressure plate. The multiple support blocks 328 are used to abut against the multiple piston rods of the multiple hydraulic cylinders 331 to receive the pressurizing force from the multiple piston rods. It is understood that the number of middle annular reinforcing ribs of the pressure plate can be one or more. For example, in this embodiment, it includes two middle annular reinforcing ribs of the pressure plate, one of which is the middle annular reinforcing rib 326 of the pressure plate on which the support block 328 is located, and the other is the middle annular reinforcing rib located inside the middle annular reinforcing rib 326 of the pressure plate.

[0108] See Figure 2The main plane of the tray body 110 is rectangular, and the upper surface of the tray body 110 has a plurality of concentric annular flow-guiding grooves 112 and a plurality of tray body overflow holes 113 disposed at the flow-guiding grooves 112. The plurality of flow-guiding grooves 112 are used to guide the cooling medium to the plurality of tray body overflow holes 113. The plurality of tray body overflow holes 113 are distributed along a radial straight line extending outward from the center of the tray body 110. In addition, as Figure 7 As shown, the mounting plate 310 may have a mounting plate overflow hole 314. Figure 3 As shown, the pressure plate 320 includes a pressure plate overflow hole 329. It is understood that the transformer coil pressurization device of this invention can use a cooling medium to cool the transformer coil when pressurizing it.

[0109] Compared with solutions such as four-column presses and pressurization equipment with transfer trays, the transformer coil pressurization device of this utility model has at least the following advantages:

[0110] First, the transformer coil pressurization device of this utility model requires less investment, occupies less space, and has a smaller power consumption.

[0111] Secondly, the transformer coil pressurization device of this utility model is lightweight and easy to transport.

[0112] Third, the transformer coil pressurization device of this utility model combines the pallet body and the transfer pallet into one, avoiding displacement and tipping of the pallet body and the transfer pallet during transfer, thus eliminating safety risks.

[0113] 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 within the scope of protection of this application.

Claims

1. A transformer coil pressurization device, characterized in that, include: The lower tray assembly (100) has an upward-facing support surface (111) adapted to support the lower end of the transformer coil to be compressed; A pull shaft (200), the pull shaft (200) being arranged vertically, the lower end of the pull shaft (200) being fixedly mounted to the lower tray assembly (100); and An upper pressure plate assembly (300) is sleeved on the pull shaft (200) and has a downward-facing pressure surface (321) adapted to abut against the upper end of the transformer coil and capable of moving vertically downward along the pull shaft (200) to apply pressure to the transformer coil; The upper pressure plate assembly (300) includes a mounting plate (310), a pressure plate (320), and a drive device (330). The mounting plate (310) is located above the pressure plate (320) and is configured to be fixed relative to the pull shaft (200). The drive device (330) is mounted on the mounting plate (310) and configured to drive the pressure plate (320) to move vertically relative to the pull shaft (200). The lower surface of the pressure plate (320) constitutes the pressure surface (321).

2. The transformer coil pressurization device according to claim 1, characterized in that, The drive unit (330) includes a plurality of hydraulic cylinders (331); The mounting plate (310) has a plurality of hydraulic cylinder mounting seats (312), each hydraulic cylinder mounting seat (312) having a hydraulic cylinder mounting hole (311), the cylinder body of each hydraulic cylinder (331) being mounted on the corresponding hydraulic cylinder mounting seat (312) and located above the mounting plate (310), and the piston rod of each hydraulic cylinder (331) passing through the corresponding hydraulic cylinder mounting hole (311) to abut against and drive the pressure plate (320).

3. The transformer coil pressurization device according to claim 1, characterized in that, The lower tray assembly (100) includes: A pallet body (110), the pallet body (110) being a plate-like structure and extending horizontally, the upper surface of the pallet body (110) forming the support surface (111); and Two support legs (120) are located below the tray body (110) and are fixedly connected to two opposite sides of the tray body (110) respectively, so that the two support legs (120) are arranged parallel and spaced apart. Each support leg (120) is elongated, with its two short sides extending vertically and its two long sides extending horizontally. The pallet body (110) and the two support legs (120) together enclose a receiving space, which is suitable for accommodating an air cushion vehicle used for transporting the transformer coil pressurization equipment.

4. The transformer coil pressurization device according to any one of claims 1 to 3, characterized in that, The main plane of the mounting plate (310) and the main plane of the pressure plate (320) are both circular. The diameter of the mounting plate (310) is smaller than the diameter of the pressure plate (320). Multiple lifting points (322) are provided in the outer peripheral area of ​​the pressure plate (320) protruding from the mounting plate (310) so that the mounting plate (310) and the pressure plate (320) can be lifted together by lifting equipment. The upper pressure plate assembly (300) further includes a plurality of screw assemblies (340) that movably connect the mounting plate (310) and the pressure plate (320) together. Each of the screw assemblies (340) includes a double-ended screw and a spring sleeved on the double-ended screw. Each double-ended screw passes through the mounting plate (310) and the pressure plate (320). The lower end of each double-ended screw is tightened to the pressure plate (320), and the upper end of each double-ended screw extends a distance from the upper surface of the mounting plate (310) and is tightened with a nut. The distance corresponds to the vertical stroke of the pressure plate (320). The lower end of the spring abuts against the upper surface of the mounting plate (310), and the upper end of the spring abuts against the corresponding nut.

5. The transformer coil pressurization device according to any one of claims 1 to 3, characterized in that, The pull shaft (200) is provided with a plurality of slots (201), the plurality of slots (201) are spaced apart from each other along the axial direction of the pull shaft (200), and each slot (201) extends along the circumferential direction of the pull shaft (200); Furthermore, the upper pressure plate assembly (300) also includes a fixing device (350) disposed on the mounting plate (310) for fixing the mounting plate (310) on the pull shaft (200), the fixing device (350) being adapted to selectively engage with any one of the plurality of slots (201).

6. The transformer coil pressurization device according to claim 5, characterized in that, The fixing device (350) includes: The two retaining rings (353) can close relative to each other to engage with the retaining groove (201), or open relative to each other to disengage from the retaining groove (201); Two handles (351) are respectively connected to two retaining rings (353) to control the opening and closing of the two retaining rings (353). The two handles (351) have an open configuration that is far apart from each other and a closed configuration that is close together. In the open configuration, the two retaining rings (353) are disengaged from the retaining groove (201), while in the closed configuration, the two retaining rings (353) are engaged with the retaining groove (201). A limiting stop (352) is provided on the mounting plate (310) to limit the position of the two handles (351) so that the two handles (351) are held in the open configuration or the closed configuration.

7. The transformer coil pressurization device according to claim 2, characterized in that, The plurality of hydraulic cylinders (331) are distributed at equal angles around the center point of the mounting plate (310) on a circumference; The plurality of hydraulic cylinders (331) are divided into a first group of hydraulic cylinders and a second group of hydraulic cylinders, each of the first group of hydraulic cylinders and the second group of hydraulic cylinders including a plurality of hydraulic cylinders. The drive device includes a main oil circuit for supplying hydraulic oil. The main oil circuit is divided into a first sub-oil circuit (337) and a second sub-oil circuit (338) by a first distributor (332). The first sub-oil circuit (337) is divided into a plurality of branch oil circuits (339) by a second distributor (333), and the second sub-oil circuit (338) is divided into a plurality of branch oil circuits by another second distributor. The plurality of branch oil circuits originating from the first sub-oil circuit (337) supply oil to the first group of hydraulic cylinders, while the plurality of branch oil circuits originating from the second sub-oil circuit (338) supply oil to the second group of hydraulic cylinders.

8. The transformer coil pressurization device according to any one of claims 1 to 3, characterized in that, The mounting plate (310) includes: A mounting plate through hole (316) located in the central region of the mounting plate (310) through which the pull shaft (200) passes; An annular reinforcing rib (317) is formed around the through hole (316) in the mounting plate; The outer annular reinforcing rib (318) of the mounting plate is concentric with the inner annular reinforcing rib (317) of the mounting plate and is located outside the inner annular reinforcing rib (317); Multiple radial reinforcing ribs (319) of the mounting plate extend radially outward from the inner annular reinforcing rib (317) of the mounting plate and further extend radially outward after intersecting with the outer annular reinforcing rib (318) of the mounting plate; and A retaining ring support plate (313) covers the annular reinforcing rib (317) inside the mounting plate. The retaining ring support plate (313) has a support plate through hole through which the pull shaft (200) passes and is equipped with a fixing device (350) for fixing the mounting plate (310) on the pull shaft (200).

9. The transformer coil pressurization device according to claim 2, characterized in that, The pressure plate (320) includes: A pressure plate through hole (323) located in the central region of the pressure plate (320) through which the pull shaft (200) passes; An annular reinforcing rib (324) is formed around the through hole (323) of the pressure plate; The outer annular reinforcing rib (325) of the pressure plate is concentric with the inner annular reinforcing rib (324) of the pressure plate and is located outside the inner annular reinforcing rib (324) of the pressure plate; The middle annular reinforcing rib (326) of the pressure plate is concentric with the inner annular reinforcing rib (324) of the pressure plate and is located between the inner annular reinforcing rib (324) and the outer annular reinforcing rib (325) of the pressure plate; Multiple radial reinforcing ribs (327) of the pressure plate extend radially outward from the inner annular reinforcing rib (324) of the pressure plate and further extend radially outward after intersecting with the outer annular reinforcing rib (325) of the pressure plate; and Multiple support blocks (328) extend radially on both sides from the central annular reinforcing rib (326) of the pressure plate. The multiple support blocks (328) are used to abut against the multiple piston rods of the multiple hydraulic cylinders (331) to receive the pressurizing force from the multiple piston rods.

10. The transformer coil pressurization device according to claim 3, characterized in that, Each of the two support legs (120) includes: The motherboard (121) is arranged vertically. The top plate (122) and the bottom plate (123) are arranged horizontally and are respectively installed above and below the main board (121); The first end plate (124) and the second end plate (125) are arranged vertically and respectively installed at both ends of the main plate (121), and connected to the top plate (122) and the bottom plate (123); and Multiple reinforcing plates (126), each reinforcing plate (126) is connected between the top plate (122) and the bottom plate (123), and is connected to the main plate (121); The first end plate (124) and the second end plate (125) both include a guide plate (127) that is inclined outward from the main plate (121) in a direction away from the receiving space to guide the air cushion vehicle in and out of the receiving space.

11. The transformer coil pressurization device according to claim 3, characterized in that, The main plane of the tray body (110) is rectangular. Furthermore, the upper surface of the tray body (110) has a plurality of annular, concentric flow-guiding grooves (112) and a plurality of tray body overflow holes (113) disposed at the flow-guiding grooves (112). The plurality of flow-guiding grooves (112) are used to guide the cooling medium to flow to the plurality of tray body overflow holes (113).

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