An automatic epoxy resin casting device and method for dry-type transformers

Abstract

This invention discloses an automatic epoxy resin casting device and method for dry-type transformers, relating to the technical field of high-voltage coil casting tools. It includes a base plate with a support frame connected to the center of its upper surface. A storage box is connected above the support frame. A movable plate is positioned above the base plate, and symmetrically arranged lifting plates are positioned above the movable plate. A support plate is positioned above the lifting plates. First springs are connected at the four corresponding corners of the lifting plates and support plates. A coil is positioned above the support plate. Automatic material control is achieved through a weighing scale combined with the self-weight linkage structure of the first springs. During casting, the increasing weight of the epoxy resin mixture compresses the first springs, causing the feed pipe to gradually descend, continuously reducing the feed inlet's flow area and automatically slowing the flow rate. Once the specified weight is reached, the feed pipe is removed from the storage box, and the sealing block resets under the action of the second spring for sealing. This avoids the defects of over- or under-casting when using valve control, improving work efficiency.

Description

Technical Field

[0001] This invention belongs to the technical field of high-voltage coil casting tools, specifically relating to an automatic epoxy resin casting device and method for dry-type transformers. Background Technology

[0002] Dry-type transformers are transformers that do not use insulating oil for cooling. They rely on air convection for heat dissipation. The high and low voltage coils are insulated with epoxy resin. There is no risk of oil leakage or explosion during operation. They are safe and environmentally friendly and are often used in indoor places such as shopping malls, hospitals, office buildings, and power distribution rooms. They are compact and easy to maintain, making them suitable for power supply scenarios with high requirements for fire prevention and dust prevention.

[0003] The epoxy resin casting device for dry-type transformers is a specialized piece of equipment for processing dry-type transformer coils. It can mix epoxy resin raw materials and feed them into a mold to wrap the coil. After heating and curing, an insulating protective layer is formed. It is equipped with components for material mixing, temperature control, and mold fastening to ensure the insulation of the windings and the stability of the overall structure.

[0004] Patent application CN213025791U discloses an epoxy resin vacuum casting device for transformer production. Through the cooperation of an air pump, a casting tank, and an air bladder, the device applies pressure to the casting inside the casting tank by inflating the air bladder after casting, ensuring the tightness of the casting structure and increasing the yield rate. However, the epoxy resin casting in this device is controlled by control valve A. Control valve A is opened when casting is needed and closed after casting is complete. While this method achieves epoxy resin casting, in practice, control valve A may close too early or too late, resulting in more or less epoxy resin being cast than the specified range, requiring further processing, adding extra steps, and reducing production efficiency. Summary of the Invention

[0005] This invention provides an automatic epoxy resin casting device and method for dry-type transformers. One objective is to solve the problem in the prior art that the amount of epoxy resin cast cannot be accurately controlled, leading to the need for subsequent processing and reduced efficiency. Another objective is to solve the problem in the prior art that the epoxy resin casting continuity of dry-type transformers is poor, and the next casting cannot be carried out immediately after the completion of one casting.

[0006] The objective of this invention can be achieved through the following technical solutions: An automatic epoxy resin casting device for dry-type transformers includes a base plate, a support frame connected to the center of the upper surface of the base plate, a storage box connected above the support frame, a movable plate above the base plate, symmetrically arranged lifting plates above the movable plate, a support plate above the lifting plates, and first springs connected at the four corners of the lifting plates and support plates. A coil is placed above the support plate, and a casting mold is placed outside the coil. A discharge pipe is connected to the center of the lower part of the storage box, a sealing block is placed between the discharge pipe and the storage box, and an inlet pipe is slidably connected inside the discharge pipe. The upper end of the inlet pipe has multiple circumferentially arranged inlet ports, and the lower end of the inlet pipe... The system is connected to multiple branch pipes arranged in a circular array. The second motor raises the coil to a specified height, causing the feed pipe to rise and enter the storage tank. The epoxy resin mixture enters the feed pipe through the feed inlet and flows into the casting area through the branch pipes. As more epoxy resin mixture is cast, the weight on the first spring increases, causing the first spring to contract and the coil to descend. The feed pipe descends synchronously, gradually blocking the feed inlet with the discharge pipe. The exposed area of ​​the feed inlet gradually decreases, reducing the amount of epoxy resin mixture entering the feed pipe. When the specified weight is measured by weighing, the feed pipe is removed from the storage tank, preventing more epoxy resin mixture from flowing into the feed pipe, thus completing the casting process.

[0007] Preferably, a fixing frame is connected to the position of the sealing block inside the storage box, a second spring is connected between the sealing block and the fixing frame, a third limiting rod is connected to the side of the sealing block near the second spring, and the third limiting rod is slidably connected to the fixing frame.

[0008] Preferably, a support cylinder is connected to the support frame at the position corresponding to the branch pipe, a cross rod is connected to the middle of the branch pipe, the cross rod is slidably connected to the support cylinder, a lifting block is connected to the lower end of the cross rod, and a third spring is connected between the support cylinder and the lifting block.

[0009] Preferably, a first lead screw is rotatably connected to the middle of the base plate corresponding to the position of the movable plate. The first lead screw is threadedly connected to the middle of the movable plate, and one end of the first lead screw passes through the base plate and is connected to the first motor.

[0010] Preferably, the movable plate is connected to the position of the lifting plate by symmetrically arranged second limiting rods, and the lifting plate is slidably connected to the second limiting rods.

[0011] Preferably, a symmetrically arranged limiting shell is connected to the position of the lifting plate inside the support frame, and a second lead screw is rotatably connected to the middle of the limiting shell. The upper end of the second lead screw passes through the limiting shell and is connected to a second motor fixed to the upper surface of the limiting shell.

[0012] Preferably, a lifting block is threadedly connected to the outer side of the second lead screw, and a U-shaped lifting plate is connected to the side of the lifting block away from the limiting housing.

[0013] Preferably, the movable plate is connected to the position of the lifting plate by symmetrically arranged second limiting rods, and the lifting plate is slidably connected to the second limiting rods.

[0014] Preferably, the width of the lifting plate is greater than the width of the moving plate, and the lower surface of the support plate is connected to a sleeve rod at the position corresponding to the first spring, and the upper surface of the lifting plate is connected to a sleeve at the position corresponding to the sleeve rod.

[0015] The present invention also provides an automatic epoxy resin casting method for dry-type transformers, comprising the following steps: S1: The coil is fixed to the support plate away from the support frame by casting mold.

[0016] S2: Start the first motor. The first motor drives the first lead screw to rotate, causing the moving plate to move the fixed coil to below the support frame, and also causing the lifting plate that was originally below the support frame to move to a position away from the support frame.

[0017] S3: Start the second motor. The second motor drives the second lead screw to rotate. The second lead screw drives the lifting block and the lifting plate to rise. The lifting plate drives the coil, casting mold, top block, cross rod, support rod and feed pipe to rise. The rise of the feed pipe drives the sealing block to rise, so that the feed pipe enters the storage box and the sealing block moves away from the discharge pipe. After the coil rises to the specified height, the second motor stops running.

[0018] S4: The epoxy resin mixture enters the feed pipe through the feed port and then enters the branch pipe, flowing into the casting position between the casting module and the coil through the branch pipe.

[0019] S5: As the epoxy resin mixture is poured, the weight on the first spring increases, and the first spring gradually contracts, causing the coil, casting mold, branch pipe, and feed pipe to gradually descend. When the weighing scale measures the specified weight, the contraction of the first spring causes the feed pipe to move out of the storage box, and the sealing block resets to seal the storage box, preventing the epoxy resin mixture from entering the feed pipe again. This ensures that the amount of epoxy resin mixture to be poured is exactly within the specified range.

[0020] S6: After standing still for 1 to 2 minutes, the weighing scale sends a signal to the second motor, causing the second motor to reverse and drive the lifting plate and the completed coil to descend. After the descent is complete, it sends a signal to the first motor, causing the first motor to reverse and drive the completed coil away from the support frame, and then drive the next coil to be poured to the bottom of the support frame for pouring.

[0021] The beneficial effects of this invention are: 1) Automatic material control is achieved through the weighing scale combined with the self-weight linkage structure of the first spring. During the pouring process, the increase in the weight of the epoxy resin mixture will compress the first spring, causing the feed pipe to gradually descend, which continuously reduces the feed flow area at the feed port and automatically slows down the flow rate. After the specified weight is reached, the feed pipe is removed from the storage box, and the sealing block is reset under the action of the second spring to seal, avoiding the defects of over- or under-pouring when the valve is controlled, and improving work efficiency.

[0022] 2) Equipped with a first lead screw driving the moving plate, it can complete the automatic switching of the work station. When the coil under the support frame is working at the casting station, the work station away from the support frame can simultaneously clamp the coil to be processed. After the casting is completed, the next coil to be cast can be sent in without stopping the machine to wait, which improves the continuity of production and work efficiency. Attached Figure Description

[0023] The invention will now be further described with reference to the accompanying drawings.

[0024] Figure 1 This is a perspective view of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 yes Figure 2 A magnified view of a section at point A in the middle; Figure 4 This is a perspective view of the lifting plate in this invention; Figure 5 This is a perspective view of the limiting outer shell in this invention; Figure 6 This is an exploded view of the feed pipe in this invention; Figure 7 This is a perspective view of the sealing block in this invention.

[0025] In the diagram: 1. Base plate; 2. Moving plate; 3. Second limiting rod; 4. Limiting housing; 5. Discharge pipe; 11. Support frame; 12. Storage bin; 21. First lead screw; 22. First motor; 23. First limit rod; 31. Lifting plate; 32. Support plate; 33. First spring; 34. Sleeve rod; 35. Sleeve; 36. Coil; 37. Casting mold; 41. Second lead screw; 42. Second motor; 43. Lifting block; 44. Lifting plate; 51. Blocking block; 52. Fixing frame; 53. Second spring; 54. Third limiting rod; 55. Feed pipe; 56. Feed inlet; 57. Branch pipe; 58. Support cylinder; 59. Limiting groove; 510. Cross rod; 511. Lifting block; 512. Third spring. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0027] There are many specifications of existing dry-type transformers, and the amount of epoxy resin mixture required for casting varies for different specifications of dry-type transformers. The dry-type transformer produced in this application is an industry standard of 1250KVA, which requires about 500kg of epoxy resin mixture for casting.

[0028] Please see Figure 1 and Figure 2 As shown, an automatic epoxy resin casting device for dry-type transformers includes a base plate 1, a support frame 11 connected to the middle of the upper surface of the base plate 1, and a storage box 12 connected above the support frame 11. The support frame 11 is used to support and fix the storage box 12, and the storage box 12 is used to place epoxy resin mixture.

[0029] A heating plate is installed inside the storage bin 12, which is used to heat the epoxy resin mixture.

[0030] The storage bin 12 is connected to a vacuum pump, which is used to vacuum the storage bin 12 to remove air bubbles present in the epoxy resin mixture, thereby ensuring the quality of the dry-type transformer after production.

[0031] It is worth noting that the heating plate and vacuum pump are existing technologies and are not shown in the figure, so they will not be discussed in detail here.

[0032] Please see Figure 1 and Figure 2 As shown, a movable plate 2 is provided above the base plate 1, and the movable plate 2 is used to drive the coil 36 to move.

[0033] A first lead screw 21 is rotatably connected to the middle of the base plate 1, corresponding to the position of the movable plate 2. The first lead screw 21 is threadedly connected to the middle of the movable plate 2 and is used to drive the movable plate 2 to move.

[0034] One end of the first lead screw 21 passes through the base plate 1 and is connected to the first motor 22. The first motor 22 is used to drive the first lead screw 21 to rotate.

[0035] A first limiting rod 23 is symmetrically arranged at the middle of the base plate 1 corresponding to the position of the movable plate 2. The first limiting rod 23 is slidably connected to the movable plate 2. The first limiting rod 23 is used to limit the position of the movable plate 2 and prevent the movable plate 2 from deflecting during the movement.

[0036] Please see Figure 1 , Figure 2and Figure 4 As shown, a symmetrically arranged lifting plate 31 is provided above the movable plate 2. The lifting plate 31 is used to drive the coil 36 to move up and down. The second limiting rod 3 is used to limit the position of the lifting plate 31 to prevent the lifting plate 31 from shifting.

[0037] A weighing scale is installed inside the movable plate 2 at the position corresponding to the lifting plate 31. The weighing scale is used to weigh the weight above the lifting plate 31.

[0038] The width of the lifting plate 31 is greater than the width of the moving plate 2. This arrangement ensures that the lifting plate 31 can enter the lifting plate 44, so that the lifting plate 44 can drive the lifting plate 31 to move up and down.

[0039] A support plate 32 is provided above the lifting plate 31, and the support plate 32 is used to support the coil 36.

[0040] A first spring 33 is connected to each of the four corners of the lifting plate 31 and the support plate 32. When the first spring 33 contracts, it causes the coil 36 to descend and at the same time resets the support plate 32.

[0041] A sleeve rod 34 is connected to the lower surface of the support plate 32 at the position corresponding to the first spring 33, and a sleeve 35 is connected to the upper surface of the lifting plate 31 at the position corresponding to the sleeve rod 34. The sleeve rod 34 and the sleeve 35 are slidably connected. The sleeve rod 34 and the sleeve 35 are used to limit the position of the support plate 32 to prevent the lifting plate 31 from shifting and the first spring 33 from deforming.

[0042] A coil 36 is provided above the support plate 32, and a casting mold 37 is provided on the outside of the coil 36. The casting mold 37 is composed of a lower base plate 1, an outer mold side plate, and an upper cover clamping plate. The casting mold 37 is used to assist in pouring epoxy resin mixture onto the outside of the coil 36 to prevent the epoxy resin mixture from leaking out.

[0043] Please see Figure 1 , Figure 2 and Figure 5 As shown, symmetrically arranged limiting shells 4 are connected inside the support frame 11 at the position corresponding to the lifting plate 31. A second lead screw 41 is rotatably connected to the middle of the limiting shell 4. The upper end of the second lead screw 41 passes through the limiting shell 4 and is connected to a second motor 42 fixed to the upper surface of the limiting shell 4. A lifting block 43 is threadedly connected to the outer side of the second lead screw 41. A U-shaped lifting plate 44 is connected to the side of the lifting block 43 away from the limiting shell 4. The limiting shell 4 is used to limit the position of the lifting block 43 and the lifting plate 44. The second lead screw 41 is used to drive the lifting block 43 and the lifting plate 44 to lift and lower. The second motor 42 is used to drive the second lead screw 41 to rotate. The lifting block 43 cooperates with the lifting plate 44 to drive the lifting plate 31 to lift and lower, thereby causing the coil 36 to lift and lower.

[0044] Please see Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, a discharge pipe 5 is connected to the lower center of the storage box 12. The discharge pipe 5 passes through the support frame 11. A sealing block 51 is provided between the discharge pipe 5 and the storage box 12. The discharge pipe 5 is used for discharging epoxy resin mixture, and the sealing block 51 is used to seal the discharge pipe 5 to prevent the epoxy resin mixture from flowing out.

[0045] A fixing frame 52 is connected to the position of the sealing block 51 inside the storage box 12. A second spring 53 is connected between the sealing block 51 and the fixing frame 52. The second spring 53 is used to reset the sealing block 51.

[0046] A third limiting rod 54 is connected to the side of the sealing block 51 near the second spring 53. The third limiting rod 54 is slidably connected to the fixing frame 52 and is located inside the second spring 53. The third limiting rod 54 is used to limit the position of the sealing block 51 and prevent the sealing block 51 from shifting.

[0047] A feed pipe 55 is slidably connected inside the discharge pipe 5. The upper end of the feed pipe 55 has multiple feed ports 56 arranged in a circular array. The feed pipe 55 is used to lift the sealing block 51. After the feed pipe 55 and the feed ports 56 lift the sealing block 51, the epoxy resin mixture can enter the feed pipe 55 and the branch pipe 57.

[0048] The lower end of the feed pipe 55 is connected to multiple branch pipes 57 arranged in a circular array. The branch pipes 57 are used to transport the epoxy resin mixture to different locations.

[0049] The support frame 11 is connected to the support cylinder 58 at the position corresponding to the branch pipe 57. The support cylinder 58 is provided with a limiting groove 59 at the position corresponding to the branch pipe 57. The branch pipe 57 is slidably connected in the limiting groove 59. The support cylinder 58 is used to support the feed pipe 55 and the branch pipe 57. The limiting groove 59 is used to limit the position of the branch pipe 57 to prevent the branch pipe 57 from deflecting or shifting.

[0050] A cross rod 510 is connected to the middle of the branch pipe 57. The cross rod 510 is slidably connected to the support cylinder 58. The cross rod 510 is used to limit the position of the branch pipe 57 and prevent the branch pipe 57 from deflecting or shifting.

[0051] The lower end of the cross rod 510 is connected to a lifting block 511, which is used to assist in moving the feed pipe 55 and the branch pipe 57 upward.

[0052] A third spring 512 is connected between the support cylinder 58 and the lifting block 511. The cross rod 510 is located inside the third spring 512. The third spring 512 is used to reset the feed pipe 55 and the branch pipe 57.

[0053] In practical use, when casting coil 36, the second motor 42 and the second lead screw 41 raise coil 36 to a specified height. During the raising of coil 36, casting mold 37 rises synchronously to contact lifting block 511. The lifting block 511, in conjunction with the casting mold 37, raises cross rod 510, support rod, and feed pipe 55. After casting mold 37 contacts lifting block 511, support pipe 57 enters the casting area, and feed pipe 55 rises into storage box 12, lifting sealing block 51 to a position away from discharge pipe 5. This allows epoxy resin mixture to enter feed pipe 55 through inlet 56 and flow into casting area through support pipe 57. As the amount of epoxy resin mixture cast increases, the weight on first spring 33 increases, causing... The first spring 33 contracts, causing the coil 36 to descend. Simultaneously, the feed pipe 55 descends and gradually moves out of the storage box 12. During the descent, the feed port 56 is gradually blocked by the discharge pipe 5, and the exposed area of ​​the feed port 56 gradually decreases, reducing the amount of epoxy resin mixture entering the feed pipe 55. This prevents excessive epoxy resin mixture from being poured too quickly, ensuring that the epoxy resin mixture remains within the specified range. When the specified weight is measured on the weighing scale, the feed pipe 55 moves out of the storage box 12 and into the discharge pipe 5. The epoxy resin mixture no longer flows into the feed pipe 55, thus completing the pouring process. This prevents the poured epoxy resin from being more or less than the specified range, avoiding subsequent problems and improving work efficiency.

[0054] Furthermore, the present invention provides a method for automatically casting epoxy resin into a dry-type transformer using an automatic epoxy resin casting device, which is carried out through the following steps: The coil 36 is fixed to the support plate 32, which is away from the support frame 11, by means of the casting mold 37.

[0055] The first motor 22 is started, which drives the first lead screw 21 to rotate. During the rotation of the first lead screw 21, it works in conjunction with the first limit rod 23 to move the moving plate 2. The moving plate 2 moves the fixed coil 36 to below the support frame 11. After the moving plate 2 moves, the lifting plate 31, which was originally below the support frame 11, moves to a position away from the support frame 11. Thus, while the coil 36 below the support frame 11 is being cast with epoxy resin, the next coil 36 can be fixed. After completing one casting operation, another coil 36 can be moved to below the support frame 11 for casting immediately, improving continuity and work efficiency.

[0056] After the movable plate 2 moves, the lifting plate 31 is inside the lifting plate 44. The second motor 42 is started, and the second motor 42 drives the second lead screw 41 to rotate. The rotation of the second lead screw 41 causes the lifting block 43 and the lifting plate 44 to rise. The rise of the lifting plate 44 causes the coil 36 and the casting mold 37 to rise. After the casting mold rises, it contacts the lifting block 511 and causes the lifting block 511 to rise. After the casting mold contacts the lifting block 511, the branch pipe 57 is located at the casting position between the casting mold and the coil 36. The rising of 511 causes the crossbar 510, support rod, and feed pipe 55 to rise, compressing the third spring 512 and causing it to contract. After the feed pipe 55 rises, it contacts the sealing block 51, causing it to rise and move away from the discharge pipe 5. This compresses the second spring 53, causing it to contract. The second lead screw 41 then drives the coil 36 to rise to the designated height, at which point the second motor 42 stops. At this point, the sealing block 51 moves away from the feed pipe 55, and the feed pipe 55... Within the storage bin 12, epoxy resin mixture enters the feed pipe 55 through the feed inlet 56 and then into the branch pipe 57. From there, it flows into the casting position between the casting mold and the coil 36. As more epoxy resin mixture is poured, the weight borne by the first spring 33 increases, causing it to gradually contract. After contraction, the coil 36 and the casting mold 37 gradually descend. Under the restoring force of the third spring 512, the branch pipe 57 and the feed pipe 55 gradually... As the material descends, when the weighing scale measures the specified weight, the contraction of the first spring 33 causes the feed pipe 55 to move out of the storage box 12 and into the discharge pipe 5. Under the action of the third spring 512, the sealing block 51 is reset, sealing the storage box 12 and preventing the epoxy resin mixture from entering the feed pipe 55. This ensures that the amount of epoxy resin mixture to be poured is exactly within the specified range, preventing the amount of epoxy resin poured from being more or less than the specified range, avoiding subsequent problems, and improving work efficiency.

[0057] When the weighing scale measures the specified weight, the pouring work is complete. After standing still for 1 to 2 minutes to allow the epoxy resin mixture in the feed pipe 55 and branch pipe 57 to flow out, the weighing scale sends a signal to the second motor 42, causing the second motor 42 to reverse and drive the lifting plate 31 and the poured coil 36 to descend. After the descent is complete, it sends a signal to the first motor 22, causing the first motor 22 to reverse and drive the poured coil 36 away from the support frame 11. It also drives the next coil 36 to be poured to the bottom of the support frame 11 for pouring, thus achieving continuous pouring and improving work efficiency.

[0058] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0059] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. An automatic epoxy resin casting device for dry-type transformers, comprising a base plate (1), a support frame (11) connected to the middle of the upper surface of the base plate (1), and a storage box (12) connected above the support frame (11), characterized in that: A movable plate (2) is provided above the base plate (1), and a symmetrically arranged lifting plate (31) is provided above the movable plate (2). A support plate (32) is provided above the lifting plate (31). A first spring (33) is connected to each of the four corners of the lifting plate (31) and the support plate (32). A coil (36) is provided above the support plate (32), and a casting mold (37) is provided outside the coil (36). The material storage box (12) is connected to the middle of the lower part of the discharge pipe (5), and a sealing block (51) is provided between the discharge pipe (5) and the material storage box (12). The discharge pipe (55) is slidably connected to the discharge pipe (5). The upper end of the discharge pipe (55) is provided with multiple feed ports (56) arranged in a circular array, and the lower end of the discharge pipe (55) is connected to multiple branch pipes (57) arranged in a circular array. The second motor (42) raises the coil (36) to a specified height, causing the feed pipe (55) to rise and enter the storage box (12). The epoxy resin mixture enters the feed pipe (55) through the feed port (56) and flows into the casting area through the branch pipe (57). As the amount of epoxy resin mixture being cast increases, the weight on the first spring (33) increases. The first spring (33) contracts, causing the coil (36) to descend. The feed pipe (55) descends synchronously, causing the feed port (56) to be gradually blocked by the discharge pipe (5). The area exposed by the feed port (56) gradually decreases, gradually reducing the amount of epoxy resin mixture entering the feed pipe (55). When the specified weight is measured by the weighing scale, the feed pipe (55) is moved out of the storage box (12) so that the epoxy resin mixture no longer flows into the feed pipe (55), thus completing the casting work.

2. The automatic epoxy resin casting device for dry-type transformers according to claim 1, characterized in that: A fixing frame (52) is connected to the position of the sealing block (51) in the storage box (12). A second spring (53) is connected between the sealing block (51) and the fixing frame (52). A third limiting rod (54) is connected to the side of the sealing block (51) close to the second spring (53). The third limiting rod (54) is slidably connected to the fixing frame (52).

3. The automatic epoxy resin casting device for dry-type transformers according to claim 2, characterized in that: The support frame (11) is connected to the support cylinder (58) at the position corresponding to the branch pipe (57). A cross rod (510) is connected to the middle of the branch pipe (57). The cross rod (510) is slidably connected to the support cylinder (58). A lifting block (511) is connected to the lower end of the cross rod (510). A third spring (512) is connected between the support cylinder (58) and the lifting block (511).

4. The automatic epoxy resin casting device for dry-type transformers according to claim 3, characterized in that: The base plate (1) is rotatably connected to the position of the moving plate (2) in the middle. The first lead screw (21) is threadedly connected to the middle of the moving plate (2). One end of the first lead screw (21) passes through the base plate (1) and is connected to the first motor (22).

5. The automatic epoxy resin casting device for dry-type transformers according to claim 4, characterized in that: The movable plate (2) is connected to the position of the lifting plate (31) with symmetrically arranged second limiting rods (3), and the lifting plate (31) and the second limiting rods (3) are slidably connected.

6. The automatic epoxy resin casting device for dry-type transformers according to claim 5, characterized in that: The support frame (11) is connected to a symmetrically arranged limiting shell (4) at the position corresponding to the lifting plate (31). A second lead screw (41) is rotatably connected to the middle of the limiting shell (4). The upper end of the second lead screw (41) passes through the limiting shell (4) and is connected to a second motor (42) fixed to the upper surface of the limiting shell (4).

7. The automatic epoxy resin casting device for dry-type transformers according to claim 6, characterized in that: The second lead screw (41) is threaded with a lifting block (43) on the outside. The lifting block (43) is connected to a U-shaped lifting plate (44) on the side away from the limiting shell (4).

8. The automatic epoxy resin casting device for dry-type transformers according to claim 7, characterized in that: The movable plate (2) is connected to the position of the lifting plate (31) with symmetrically arranged second limiting rods (3), and the lifting plate (31) and the second limiting rods (3) are slidably connected.

9. The automatic epoxy resin casting device for dry-type transformers according to claim 8, characterized in that: The width of the lifting plate (31) is greater than the width of the moving plate (2). The lower surface of the support plate (32) is connected to the position of the first spring (33) with a sleeve rod (34), and the upper surface of the lifting plate (31) is connected to the position of the sleeve rod (34) with a sleeve (35).

10. An automatic epoxy resin casting method for dry-type transformers, applicable to the automatic epoxy resin casting device for dry-type transformers as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: The coil (36) is fixed on the support plate (32) away from the support frame (11) by casting mold (37); S2: Start the first motor (22), the first motor (22) drives the first lead screw (21) to rotate, so that the moving plate (2) drives the fixed coil (36) to move to the bottom of the support frame (11), and drives the lifting plate (31) that was originally below the support frame (11) to move to a position away from the support frame (11); S3: Start the second motor (42), the second motor (42) drives the second lead screw (41) to rotate, the second lead screw (41) drives the lifting block (43) and the lifting plate (44) to rise, the lifting plate (44) drives the coil (36), the casting mold (37), the lifting block (511), the cross rod (510), the support rod and the feed pipe (55) to rise, the feed pipe (55) rises and drives the sealing block (51) to rise, so that the feed pipe (55) enters the storage box (12) and the sealing block (51) moves away from the discharge pipe (5), after the coil (36) rises to the specified height, the second motor (42) stops running; S4: The epoxy resin mixture enters the feed pipe (55) through the feed port (56) and enters the branch pipe (57). It then flows through the branch pipe (57) into the casting position between the casting module and the coil (36). S5: As the epoxy resin mixture is poured, the weight on the first spring (33) increases, and the first spring (33) gradually contracts, causing the coil (36), the casting mold (37), the branch pipe (57) and the feed pipe (55) to gradually descend. When the weighing scale measures the specified weight, the contraction of the first spring (33) causes the feed pipe (55) to move out of the storage box (12), and the sealing block (51) resets to seal the storage box (12), so that the epoxy resin mixture no longer enters the feed pipe (55), thus ensuring that the amount of epoxy resin mixture to be poured is just within the specified range. S6: After standing still for 1 to 2 minutes, the weighing scale sends a signal to the second motor (42), causing the second motor (42) to reverse and drive the lifting plate (31) and the cast coil (36) to descend. After the descent is completed, a signal is sent to the first motor (22), causing the first motor (22) to reverse and drive the cast coil (36) away from the support frame (11), and drive the next coil (36) to be cast to the bottom of the support frame (11) for casting.

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