Resin filling equipment for transformer manufacturing

Abstract

The invention provides resin filling equipment for transformer manufacturing, and belongs to the technical field of transformer manufacturing, the resin filling equipment comprises an inner annular template, an outer annular template, an annular sealing bottom plate, a base, a driving assembly, a material pressing assembly and an annular sealing top plate, the inner annular mold plate is arranged on the inner side of the outer annular mold plate, an annular cavity is formed between the inner annular mold plate and the outer annular mold plate, the inner annular mold plate and the outer annular mold plate are each of an integrally-formed seamless structure, and the annular sealing bottom plate is arranged outside the inner annular mold plate in a sleeving mode and acts on the bottom of the outer annular mold plate. Compared with the prior art, the embodiment of the invention has the advantages that after the resin is cast and molded, the resin can be quickly demolded, and meanwhile, the molded resin is smooth and flat in surface, so that the resin can be put into assembly and use without further grinding and polishing, and has the advantages of good resin molding effect and high molding efficiency.

Description

Technical Field

[0001] This invention belongs to the field of transformer manufacturing technology, specifically a resin filling device for transformer manufacturing. Background Technology

[0002] The coil is one of the most important electromagnetic circuit structural components of a dry-type transformer, and it plays a crucial role in the operational reliability of the dry-type transformer. Currently, during the manufacturing of dry-type transformer coils, epoxy resin needs to be poured onto the outside of the coil to protect it and achieve purposes such as moisture protection and flame retardancy.

[0003] In existing technologies, when casting annular resin onto the outside of a coil, a mold is usually required to cover the coil. Most existing molds consist of an inner coil mold and an outer coil mold. The outer coil mold is often a split, assembled structure. After assembly, it needs to be secured with several sets of bolts and nuts or clips to form a stable annular space for resin casting between the outer and inner coil molds. Once the resin has cured in the annular space, the bolts, nuts, or clips need to be disassembled sequentially to demold the resin. Therefore, existing resin casting and demolding processes involve numerous steps, which is not conducive to efficient resin molding. Furthermore, because the outer coil mold is a split, spliced ​​structure, gaps inevitably form on its inner wall after assembly. These gaps leave corresponding strip-shaped protrusions on the surface of the molded resin, requiring polishing before assembly and use. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a resin filling device for transformer manufacturing.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A resin filling device for transformer manufacturing includes an inner annular template, an outer annular template, an annular sealing base plate, a base, a drive assembly, a pressing assembly, and an annular sealing top plate.

[0007] The outer annular template is fixedly mounted on the upper part of the base, and the inner annular template is disposed inside the outer annular template, forming an annular cavity between them.

[0008] Both the inner annular template and the outer annular template are integrally formed seamless structures.

[0009] The annular sealing base plate is fitted over the inner annular template and acts on the bottom of the outer annular template to seal the bottom of the annular chamber.

[0010] The annular sealing top plate is movably disposed inside the annular cavity, and an injection port is provided on the annular sealing top plate.

[0011] The drive assembly is mounted on the upper part of the base and is used to drive the inner annular template to move up and down. When the inner annular template moves upward, it is pulled away from the inside of the resin.

[0012] The pressing assembly is disposed above the outer annular template. When the inner annular template moves downward, the pressing assembly is used to press down on the resin, causing the resin to detach from the inside of the outer annular template.

[0013] As a further improvement of the present invention: a first slider and a second slider are fixedly provided on the outer wall of the inner annular template.

[0014] The drive assembly includes a top plate, a first guide rod, and a lead screw.

[0015] The top plate is positioned above the inner annular template. One end of the first guide rod is fixedly connected to the bottom of the top plate, and the other end is fixedly connected to the base. The first guide rod passes through the first slider and is movably engaged with the first slider. One end of the lead screw is rotatably connected to the bottom of the top plate, and the other end is rotatably connected to the base. The lead screw passes through the second slider and is threadedly engaged with the second slider.

[0016] As a further improvement of the present invention: the lead screw is controlled to rotate by a handwheel or by a motor.

[0017] As a further improvement of the present invention: the pressing assembly includes a second guide rod, a lifting sleeve, a pressing block, and a third elastic element.

[0018] The lifting sleeve extends vertically into the inner annular template, the lower end of the second guide rod extends into the lifting sleeve and telescopically engages with the lifting sleeve, and the upper end is connected to the bottom of the top plate.

[0019] One end of the pressure block is connected to the side wall of the lifting sleeve through the third elastic element, and the other end abuts against the inner wall of the inner annular template. The third elastic element is used to provide elastic support for the pressure block, and the lower part of the side wall of the inner annular template is provided with an opening adapted to the pressure block.

[0020] As a further improvement of the present invention: an annular stop is fixedly provided on the outside of the second guide rod; the upper end of the second guide rod is rotatably connected to the bottom of the top plate; the annular stop is connected to the lifting sleeve through a second elastic element, which provides elastic tension to the lifting sleeve.

[0021] A key is fixedly provided on the outer wall of the second guide rod along its length. A keyway that mates with the key is provided on the inner wall of the lifting sleeve. A third guide rod is fixedly provided on the side wall of the second guide rod. An insertion hole is provided at one end of the pressure block for the third guide rod to extend into. An arc surface is provided at the other end of the pressure block.

[0022] As a further improvement of the present invention: a limiting plate is fixedly provided on the inner wall of the outer annular template, and a first support plate is fixedly provided on the top of the outer annular template, the first support plate extending above the annular sealing top plate.

[0023] The first support plate is connected to the annular sealing top plate by a first elastic element. The first elastic element is used to provide elastic tension to the annular sealing top plate, so that the annular sealing top plate acts on the bottom of the limiting plate.

[0024] As a further improvement of the present invention: the outer wall of the outer annular template is fixedly connected to the base through a support plate, and a discharge port for curing resin to pass through is provided at the center of the base.

[0025] As a further improvement of the present invention: a pressing component is movably provided on the upper part of the base, the pressing component being used to press against the annular sealing base plate, so that the annular sealing base plate is in close contact with the bottom of the outer annular template.

[0026] As a further improvement of the present invention: the pressing assembly includes a pressing sleeve, a screw, a second support plate, and a rotating shaft.

[0027] The lower end of the rotating shaft is rotatably connected to the base, and the upper end is fixedly connected to one end of the bottom of the second support plate. The screw is fixedly installed on the upper part of the second support plate away from the rotating shaft, and the pressure sleeve is sleeved on the outside of the screw and threadedly engaged with the screw.

[0028] As a further improvement of the present invention: the first elastic element, the second elastic element and the third elastic element are springs or metal sheets.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] In this embodiment of the invention, initially, the inner annular template is located inside the outer annular template, forming an annular cavity between the inner and outer annular templates. The annular sealing bottom plate acts on the bottom of the outer annular template to seal the bottom of the annular cavity, while the annular sealing top plate acts on the upper part of the annular cavity. When resin needs to be poured, the base, outer annular template, annular sealing bottom plate, inner annular template, and annular sealing top plate can be placed inside a vacuum tank. Then, the vacuum tank is evacuated, and resin is poured into the annular cavity through the filling port on the annular sealing top plate. After the resin is poured, the base, outer annular template, annular sealing bottom plate, inner annular template, and annular sealing top plate are removed from the vacuum tank and then sent to a curing oven to allow the resin to cure and form in the annular cavity. After the resin cures and is molded, the driving component moves the inner annular template upward relative to the outer annular template, causing the inner annular template to be pulled away from the inside of the cured resin. Then, the driving component moves the inner annular template downward to reset it. At this time, the pressing component presses down on the cured resin, causing the cured resin to detach from under the outer annular template, thus completing the automatic demolding of the resin. Through the above settings, while facilitating rapid demolding of the resin, it can effectively avoid the formation of strip-shaped protrusions on the surface of the resin after casting, thereby eliminating the need for subsequent grinding processes and improving production efficiency. Compared with existing technologies, after resin casting and molding, rapid demolding of the resin can be achieved, and the surface of the molded resin is smooth and flat, so it can be put into assembly and use without further grinding and polishing. It has the advantages of good resin molding effect and high molding efficiency. Attached Figure Description

[0031] Figure 1 A schematic diagram of the structure of a resin filling device used in transformer manufacturing. Figure 1 ;

[0032] Figure 2 A schematic diagram of the structure of a resin filling device used in transformer manufacturing. Figure 2 ;

[0033] Figure 3 A schematic diagram of the structure of a resin filling device used in transformer manufacturing. Figure 3 ;

[0034] Figure 4 for Figure 1 Enlarged view of region A in the middle;

[0035] Figure 5 for Figure 2 Enlarged view of region B in the middle;

[0036] Figure 6 for Figure 2 Enlarged diagram of region C in the middle;

[0037] Figure 7 for Figure 3Enlarged schematic diagram of region D in the middle;

[0038] In the diagram: 10-Inner annular template, 101-First slider, 102-Second slider, 103-Opening, 20-Outer annular template, 201-Support plate, 202-First support plate, 203-First elastic element, 204-Limiting plate, 30-Annular sealing base plate, 40-Base, 401-Discharge port, 50-Drive assembly, 501-Top plate, 502-First guide rod, 503-Screw rod, 504- Handwheel, 60-Pressure assembly, 601-Second guide rod, 6011-Key, 602-Annular stop, 603-Second elastic element, 604-Lifting sleeve, 605-Pressure block, 606-Third elastic element, 607-Third guide rod, 70-Annular sealing top plate, 701-Injection port, 80-Pressure assembly, 801-Pressure sleeve, 802-Screw, 803-Second support plate, 804-Rotating shaft. Detailed Implementation

[0039] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0040] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0041] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 invention.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] Please see Figure 1 , Figure 2 as well as Figure 3This embodiment provides a resin filling device for transformer manufacturing, including an inner annular template 10, an outer annular template 20, an annular sealing base plate 30, a base 40, a drive assembly 50, a pressing assembly 60, and an annular sealing top plate 70. The outer annular template 20 is fixedly disposed on the upper part of the base 40. The inner annular template 10 is disposed inside the outer annular template 20 and forms an annular cavity with the outer annular template 20. The annular sealing base plate 30 is sleeved on the outside of the inner annular template 10 and acts on the bottom of the outer annular template 20 to... The bottom of the annular chamber is sealed, and the annular sealing top plate 70 is movably disposed inside the annular chamber. The annular sealing top plate 70 has a filling port 701. The driving assembly 50 is installed on the upper part of the base 40 and is used to drive the inner annular template 10 to move up and down. When the inner annular template 10 moves up, it is pulled away from the inside of the resin. The pressing assembly 60 is disposed above the outer annular template 20. When the inner annular template 10 moves down, the pressing assembly 60 is used to press down on the resin, so that the resin is detached from the inside of the outer annular template 20.

[0044] Initially, the inner annular template 10 is located inside the outer annular template 20, forming an annular chamber between them. The annular sealing bottom plate 30 acts on the bottom of the outer annular template 20 to seal the bottom of the annular chamber, while the annular sealing top plate 70 acts on the upper part of the annular chamber. When resin needs to be poured, the base 40, outer annular template 20, annular sealing bottom plate 30, inner annular template 10, and annular sealing top plate 70 can be placed inside a vacuum tank. Then, the vacuum tank is evacuated, and resin is poured into the annular chamber through the filling port 701 on the annular sealing top plate 70. After the resin is poured, the base 40, outer annular template 20, and annular sealing bottom plate 30 are placed inside the vacuum tank. The inner annular template 10 and the annular sealing top plate 70 are removed from the vacuum tank and then sent to the curing oven to cure the resin in the annular chamber. After the resin has cured, the driving component 50 drives the inner annular template 10 to move upward relative to the outer annular template 20, so that the inner annular template 10 is pulled out from the inside of the cured resin. Then, the driving component 50 drives the inner annular template 10 to move downward and reset. At this time, the pressing component 60 presses down on the cured resin, so that the cured resin detaches from below the outer annular template 20, thereby completing the automatic demolding of the resin. With the above settings, the resin can be quickly demolded, and strip-shaped protrusions can be effectively avoided on the surface of the resin after pouring, thus eliminating the need for subsequent grinding processes and improving production efficiency.

[0045] Please see Figure 1 as well as Figure 2In one embodiment, a first slider 101 and a second slider 102 are fixedly disposed on the outer wall of the inner annular template 10. The driving assembly 50 includes a top plate 501, a first guide rod 502, and a lead screw 503. The top plate 501 is disposed above the inner annular template 10. One end of the first guide rod 502 is fixedly connected to the bottom of the top plate 501, and the other end is fixedly connected to the base 40. The first guide rod 502 passes through the first slider 101 and is movably engaged with the first slider 101. One end of the lead screw 503 is rotatably connected to the bottom of the top plate 501, and the other end is rotatably connected to the base 40. The lead screw 503 passes through the second slider 102 and is threadedly engaged with the second slider 102.

[0046] After the resin has cured and formed inside the annular cavity, the operator can rotate the lead screw 503. When the lead screw 503 rotates, it drives the second slider 102 to move upward along the outside of the lead screw 503 through the threaded engagement with the second slider 102. When the second slider 102 moves upward, it drives the inner annular template 10 to move upward, and the first slider 101 slides upward along the outside of the first guide rod 501. When the inner annular template 10 moves upward, it is pulled away from the inside of the cured resin, realizing the separation of the inner annular template 10 from the cured resin. After the inner annular template 10 is pulled away from the inside of the cured resin, the lead screw 503 is rotated in the opposite direction. Through the reverse threaded engagement between the lead screw 503 and the second slider 102, the second slider 102 is driven downward along the outside of the lead screw 503, thereby driving the inner annular template 10 and the first slider 101 to move downward. When the inner annular template 10 moves downward, the pressing assembly 60 presses down on the cured resin to press the cured resin out from the bottom of the outer annular template 20, realizing the automatic demolding of the cured resin.

[0047] Please see Figure 1 as well as Figure 2 In one embodiment, a handwheel 504 is fixedly provided on the outside of the lead screw 503, so that the lead screw 503 can be rotated.

[0048] In another embodiment, the rotation of the lead screw 503 can also be controlled by a motor, which is not limited here.

[0049] Please see Figure 1 , Figure 2 , Figure 3 , Figure 5 as well as Figure 7In one embodiment, the pressing assembly 60 includes a second guide rod 601, a lifting sleeve 604, a pressing block 605, and a third elastic element 606. The lifting sleeve 604 extends vertically into the inner annular template 10. The lower end of the second guide rod 601 extends into the lifting sleeve 604 and is in telescopic cooperation with the lifting sleeve 604. The upper end is connected to the bottom of the top plate 501. One end of the pressing block 605 is connected to the side wall of the lifting sleeve 604 through the third elastic element 606, and the other end abuts against the inner wall of the inner annular template 10. The third elastic element 606 is used to provide elastic support for the pressing block 605. The lower part of the side wall of the inner annular template 10 is provided with a through-hole 103 adapted to the pressing block 605.

[0050] Initially, the opening 103 is located below the outer annular template 20. When demolding is required, the operator rotates the screw 503 via the handwheel 504. The screw 503 drives the second slider 102, the inner annular template 10, and the first slider 101 to move upward as a whole. At this time, the inner annular template 10 moves upward relative to the pressure block 605, and the pressure block 605 slides down along the inner wall of the inner annular template 10. After the inner annular template 10 is pulled out from the inside of the cured resin, the opening 103 moves to the side of the pressure block 605. The third elastic element 606 pushes the pressure block 605 so that the pressure block 605 passes through the opening 103 and extends above the annular sealing top plate 70. Then, the operator drives the handwheel 504 to... The lead screw 503 rotates in the opposite direction, thereby driving the second slider 102, the inner annular template 10, and the first slider 101 to move downward as a whole. When the inner annular template 10 moves downward, it drives the pressure block 605 to move downward through the through-hole 103. When the pressure block 605 moves downward, it acts on the annular sealing top plate 70, thereby driving the annular sealing top plate 70 to move downward along the interior of the annular cavity, thereby pressing down on the cured resin, so that the cured resin detaches from the bottom of the outer annular template 20. When the pressure block 605 moves downward with the inner annular template 10 to press down on the cured resin, the pressure block 605 drives the lifting sleeve 604 to move downward synchronously. The lifting sleeve 604 slides downward relative to the second guide rod 601.

[0051] Please see Figure 5 as well as Figure 6In one embodiment, an annular stop 602 is fixedly provided on the outside of the second guide rod 601. The upper end of the second guide rod 601 is rotatably connected to the bottom of the top plate 501. The annular stop 602 is connected to the lifting sleeve 604 through a second elastic element 603. The second elastic element 603 is used to provide elastic tension to the lifting sleeve 604. A key 6011 is fixedly provided on the outer wall of the second guide rod 601 along the length direction. A key groove (not shown in the figure) that mates with the key 6011 is opened on the inner wall of the lifting sleeve 604. A third guide rod 607 is fixedly provided on the side wall of the second guide rod 601. One end of the pressure block 605 is provided with an insertion hole (not shown in the figure) into which the third guide rod 607 can be inserted. The other end of the pressure block 605 is provided with an arc surface.

[0052] When the inner annular template 10 moves upward, causing the opening 103 to move to the side of the pressure block 605, the third elastic element 606 pushes the pressure block 605, causing it to slide along the outside of the third guide rod 607. The end of the pressure block 605 with an arc surface passes through the opening 103 and moves above the annular sealing top plate 70. When the inner annular template 10 moves the pressure block 605 downward, thereby causing the lifting sleeve 604 to slide down along the outside of the second guide rod 601, the second elastic element 603 is stretched. After the pressure block 605 moves downward with the inner annular template 10 to press the cured resin out from the bottom of the outer annular template 20, the operator can rotate the second guide rod 601. When the second guide rod 601 rotates, the key 6011 and the keyway cooperate to drive the lifting sleeve 604 to rotate synchronously, thereby... The third guide rod 607 and the pressure block 605 rotate synchronously. When the pressure block 605 rotates, the arc surface at its end acts on the wall of the through-hole 103. The wall of the through-hole 103 pushes the pressure block 605, causing it to move in the opposite direction along the outside of the third guide rod 607. This causes the pressure block 605 to retract into the inner side of the inner annular template 10. At this time, the second elastic element 603 can pull the lifting sleeve 604, which in turn drives the lifting sleeve 604 to slide upward along the outside of the second guide rod 601. This causes the third guide rod 607 and the pressure block 605 to move upward. When the pressure block 605 moves to the initial position, the operator rotates the second guide rod 601 in the opposite direction, which in turn drives the lifting sleeve 604, the third guide rod 607, and the pressure block 605 to rotate in the opposite direction, thereby achieving the reset of the pressure block 605.

[0053] Please see Figure 1 as well as Figure 2In one embodiment, a limiting plate 204 is fixedly provided on the inner wall of the outer annular template 20, and a first support plate 202 is fixedly provided on the top of the outer annular template 20. The first support plate 202 extends above the annular sealing top plate 70, and the first support plate 202 and the annular sealing top plate 70 are connected by a first elastic member 203. The first elastic member 203 is used to provide elastic tension to the annular sealing top plate 70, so that the annular sealing top plate 70 acts on the bottom of the limiting plate 204.

[0054] During the process where the pressure block 605 acts on the upper part of the annular sealing top plate 70 and presses the annular sealing top plate 70 to move downward along the interior of the annular cavity to press the cured resin out from the bottom of the outer annular template 20, the first elastic element 203 is stretched. When the pressure block 605 retracts from the opening 103 to the inside of the inner annular template 10, since the pressure block 605 no longer acts on the upper part of the annular sealing top plate 70, the first elastic element 203 can pull the annular sealing top plate 70, so that the annular sealing top plate 70 moves upward quickly until the annular sealing top plate 70 acts on the bottom of the limiting plate 204, thereby realizing the reset of the annular sealing top plate 70.

[0055] Please see Figure 1 as well as Figure 2 In one embodiment, the outer wall of the outer annular template 20 is fixedly connected to the base 40 via a support plate 201, and the base 40 has a discharge port 401 at its center for the curing resin to pass through.

[0056] When the pressure block 605 acts on the annular sealing top plate 70 to press down on the cured resin, the cured resin passes through the discharge port 401 and falls, thus achieving demolding of the cured resin.

[0057] Please see Figure 1 In one embodiment, a pressing component 80 is movably disposed on the upper part of the base 40. The pressing component 80 is used to press against the annular sealing base plate 30, so that the annular sealing base plate 30 is in close contact with the bottom of the outer annular template 20, thereby improving the sealing effect of the annular cavity and preventing the resin poured into the annular cavity from leaking from the bottom of the outer annular template 20.

[0058] Please see Figure 4 In one embodiment, the pressing assembly 80 includes a pressing sleeve 801, a screw 802, a second support plate 803, and a rotating shaft 804. The lower end of the rotating shaft 804 is rotatably connected to the base 40, and the upper end is fixedly connected to one bottom end of the second support plate 803. The screw 802 is fixedly installed on the upper part of the second support plate 803 away from the rotating shaft 804. The pressing sleeve 801 is sleeved on the outside of the screw 802 and threadedly engaged with the screw 802.

[0059] Initially, the annular sealing base plate 30 is inserted from the bottom of the inner annular template 10 to the outside of the outer annular template 20, so that the annular sealing base plate 30 contacts the bottom of the outer annular template 20. Then, the second support plate 803 is rotated, so that the screw 802 and the pressing sleeve 801 extend below the annular sealing base plate 30. Subsequently, the pressing sleeve 801 is rotated. When the pressing sleeve 801 rotates, it can move upward through the threaded engagement with the screw 802. When the pressing sleeve 801 moves upward, it acts on the bottom of the annular sealing base plate 30, thereby pressing the annular sealing base plate 30 tightly against the bottom of the outer annular template 20. When demolding is required, the operator can first rotate in the opposite direction. The pressure sleeve 801 moves downward through the reverse thread engagement with the screw 802, thus separating it from the annular sealing base plate 30. Then, the second support plate 803 rotates in the opposite direction, which pulls the screw 802 and the pressure sleeve 801 away from below the annular sealing base plate 30. The annular sealing base plate 30 is then removed from the bottom of the outer annular template 20. Then, the handwheel 504 is rotated in the opposite direction, which drives the screw 503 to rotate in the opposite direction, thereby driving the inner annular template 10 and the pressure block 605 to move downward. The pressure block 605 acts on the annular sealing top plate 70, thereby pressing the cured resin out from the bottom of the outer annular template 20.

[0060] In one embodiment, the first elastic element 203, the second elastic element 603, and the third elastic element 606 may be springs or metal sheets, and there are no restrictions on this.

[0061] In one embodiment, the inner annular template 10 and the outer annular template 20 are both integrally formed seamless structures, making the resin surface formed between the inner annular template 10 and the outer annular template 20 smooth and flat, so that the resin can be put into assembly and use without grinding and polishing after molding.

[0062] In this embodiment of the invention, initially, the inner annular template 10 is located inside the outer annular template 20, forming an annular cavity between the inner annular template 10 and the outer annular template 20. The annular sealing bottom plate 30 acts on the bottom of the outer annular template 20 to seal the bottom of the annular cavity, while the annular sealing top plate 70 acts on the upper part of the annular cavity. When resin needs to be poured, the base 40, outer annular template 20, annular sealing bottom plate 30, inner annular template 10, and annular sealing top plate 70 can be placed inside a vacuum tank. Then, the vacuum tank is evacuated, and resin is poured into the annular cavity through the filling port 701 on the annular sealing top plate 70. After the resin is poured, the base 40, outer annular template 20, annular sealing bottom plate 30, inner annular template 10, and annular sealing top plate 70 are removed from the vacuum tank and then sent to a curing oven to allow the resin to harden. The resin is cured and molded in the annular cavity. After the resin is cured, the driving component 50 drives the inner annular template 10 to move upward relative to the outer annular template 20, so that the inner annular template 10 is pulled out from the inside of the cured resin. Then, the driving component 50 drives the inner annular template 10 to move downward and reset. At this time, the pressing component 60 presses down on the cured resin, so that the cured resin detaches from below the outer annular template 20, thereby completing the automatic demolding of the resin. With the above settings, the resin can be quickly demolded while effectively avoiding the formation of strip-shaped protrusions on the surface of the resin after casting, thus eliminating the need for subsequent grinding processes and improving production efficiency. Compared with the existing technology, the resin can be quickly demolded after casting, and the surface of the molded resin is smooth and flat, so it can be put into assembly and use without further grinding and polishing. It has the advantages of good resin molding effect and high molding efficiency.

[0063] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A resin filling device for transformer manufacturing, characterized in that, It includes an inner annular template (10), an outer annular template (20), an annular sealing base plate (30), a base (40), a drive assembly (50), a pressing assembly (60), and an annular sealing top plate (70). The outer annular template (20) is fixedly disposed on the upper part of the base (40), and the inner annular template (10) is disposed inside the outer annular template (20) and forms an annular cavity with the outer annular template (20). Both the inner annular template (10) and the outer annular template (20) are integrally formed seamless structures. The annular sealing base plate (30) is fitted over the inner annular template (10) and acts on the bottom of the outer annular template (20) to seal the bottom of the annular chamber. The annular sealing top plate (70) is movably disposed inside the annular cavity, and an injection port (701) is provided on the annular sealing top plate (70). The drive assembly (50) is mounted on the upper part of the base (40) and is used to drive the inner annular template (10) to move up and down. When the inner annular template (10) moves up, it is pulled out from the inside of the resin. The pressing assembly (60) is disposed above the outer annular template (20). When the inner annular template (10) moves down, the pressing assembly (60) is used to press down on the resin, so that the resin is detached from the inside of the outer annular template (20).

2. The resin filling equipment for transformer manufacturing according to claim 1, characterized in that, The inner annular template (10) is fixedly provided with a first slider (101) and a second slider (102) on its outer wall. The drive assembly (50) includes a top plate (501), a first guide rod (502), and a lead screw (503). The top plate (501) is positioned above the inner annular template (10). One end of the first guide rod (502) is fixedly connected to the bottom of the top plate (501), and the other end is fixedly connected to the base (40). The first guide rod (502) passes through the first slider (101) and is movably engaged with the first slider (101). One end of the lead screw (503) is rotatably connected to the bottom of the top plate (501), and the other end is rotatably connected to the base (40). The lead screw (503) passes through the second slider (102) and is threadedly engaged with the second slider (102).

3. The resin filling equipment for transformer manufacturing according to claim 2, characterized in that, The lead screw (503) is controlled to rotate by means of a handwheel (504) or by means of a motor.

4. The resin filling equipment for transformer manufacturing according to claim 2, characterized in that, The pressing assembly (60) includes a second guide rod (601), a lifting sleeve (604), a pressing block (605), and a third elastic element (606). The lifting sleeve (604) extends vertically into the inner annular template (10), the lower end of the second guide rod (601) extends into the lifting sleeve (604) and telescopically engages with the lifting sleeve (604), and the upper end is connected to the bottom of the top plate (501). One end of the pressure block (605) is connected to the side wall of the lifting sleeve (604) through the third elastic element (606), and the other end abuts against the inner wall of the inner annular template (10). The third elastic element (606) is used to provide elastic support for the pressure block (605). The lower part of the side wall of the inner annular template (10) is provided with a through-hole (103) that is compatible with the pressure block (605).

5. A resin filling device for transformer manufacturing according to claim 4, characterized in that, An annular stop (602) is fixedly installed on the outside of the second guide rod (601). The upper end of the second guide rod (601) is rotatably connected to the bottom of the top plate (501). The annular stop (602) is connected to the lifting sleeve (604) through a second elastic element (603). The second elastic element (603) is used to provide elastic tension to the lifting sleeve (604). A key (6011) is fixedly provided on the outer wall of the second guide rod (601) along the length direction. A keyway that matches the key (6011) is provided on the inner wall of the lifting sleeve (604). A third guide rod (607) is fixedly provided on the side wall of the second guide rod (601). One end of the pressure block (605) is provided with an insertion hole into which the third guide rod (607) can be inserted. The other end of the pressure block (605) is provided with an arc surface.

6. A resin filling device for transformer manufacturing according to claim 5, characterized in that, A limiting plate (204) is fixedly installed on the inner wall of the outer annular template (20), and a first support plate (202) is fixedly installed on the top of the outer annular template (20). The first support plate (202) extends above the annular sealing top plate (70). The first support plate (202) is connected to the annular sealing top plate (70) by a first elastic element (203). The first elastic element (203) is used to provide elastic tension to the annular sealing top plate (70), so that the annular sealing top plate (70) acts on the bottom of the limiting plate (204).

7. A resin filling device for transformer manufacturing according to claim 1, characterized in that, The outer wall of the outer ring template (20) is fixedly connected to the base (40) through the support plate (201), and the base (40) has a discharge port (401) at the center position for the curing resin to pass through.

8. A resin filling device for transformer manufacturing according to claim 1, characterized in that, The upper part of the base (40) is also movably provided with a pressing component (80), which is used to press against the annular sealing base plate (30) so that the annular sealing base plate (30) is in close contact with the bottom of the outer annular template (20).

9. A resin filling device for transformer manufacturing according to claim 8, characterized in that, The pressing assembly (80) includes a pressing sleeve (801), a screw (802), a second support plate (803), and a rotating shaft (804). The lower end of the rotating shaft (804) is rotatably connected to the base (40), and the upper end is fixedly connected to one end of the bottom of the second support plate (803). The screw (802) is fixedly installed on the upper part of the second support plate (803) away from the rotating shaft (804). The pressing sleeve (801) is sleeved on the outside of the screw (802) and threadedly engaged with the screw (802).

10. A resin filling device for transformer manufacturing according to claim 6, characterized in that, The first elastic element (203), the second elastic element (603) and the third elastic element (606) are springs or metal sheets.

Images