Vacuum pouring device for transformer coil

Abstract

The invention relates to the technical field of pouring and mixing, in particular to a transformer coil vacuum pouring device which comprises a premixing device, a pouring device, a vacuumizing device and a transformer coil mold, the premixing device comprises a mounting frame, a resin mixing barrel is arranged on the mounting frame, a stirring assembly is further arranged at the upper end of the mounting frame, and the vacuumizing device is arranged on the mounting frame. The stirring assembly comprises a lifting hydraulic cylinder and a stirring rod, the stirring rod is located in the resin mixing barrel, an inner hole is formed in the middle of the stirring rod, and stirring blades are arranged at the lower end of the stirring rod. The scraping ring is arranged on the inner wall of the resin mixing barrel, resin on the inner wall of the resin mixing barrel can be scraped by the scraping ring, waste of the resin is reduced, the resin is kept in a stirred posture, the precipitation and solidification phenomena of the resin are reduced, and meanwhile, the resin in the resin mixing barrel is discharged through the V-shaped discharging plate.

Description

Technical Field

[0001] This invention relates to the technical field of casting and mixing, and in particular to a vacuum casting device for transformer coils. Background Technology

[0002] A transformer coil is a coil made of conductors. There are usually two or more coils. Since a transformer can transform voltage, the number of turns of the transformer coil can be different to achieve different voltage ratios. The transformer coil is a very important component of the transformer and plays an important role in energy transmission. The transformer coil is protected by insulating material. Currently, the insulating material in the transformer coil is made by casting with a mold.

[0003] A transformer coil epoxy resin casting system according to Chinese invention patent CN202210314100.6 includes an epoxy resin casting mold and a vacuum casting tank. The epoxy resin casting mold includes an adjustable inner mold body, an inner sealing sleeve assembly, a terminal template, and an outer sealing sleeve assembly. The inner mold body includes a left waist-shaped plate, a right waist-shaped plate, a first rotating shaft, a second rotating shaft, a base plate, an adjusting slider, and a waist-shaped cylinder. The vacuum casting tank includes a tank body, a horizontal support platform, a universal ball seat, a mold base plate, a guide seat, and a horizontal guide rod. The ends of the mold base plate and the ends of the horizontal guide rod are fixedly connected by a connecting plate.

[0004] A mixing device for casting multi-winding dry-type transformer coils, disclosed in Chinese invention patent CN202210882062.4, includes a multi-axis mechanism. Multiple coil bodies are respectively inserted into elliptical boxes, and then the multiple elliptical boxes are installed in multiple rectangular slots arranged in a matrix within a rectangular mold box, thereby enabling the simultaneous installation and casting of multiple coil bodies. The screws in the first and second glue barrels rotate synchronously, the pistons move slowly downwards, and the screws drive multiple stirring rods to rotate, so as to unify the viscosity of the resin glue and easily squeeze the resin glue into the mixing cylinder.

[0005] During the use of the above equipment, as the pouring process proceeds, the resin level in the resin mixing tank will drop. Since resin is viscous, a large amount of resin easily adheres to the inner wall of the resin mixing tank. However, since the equipment is located inside a large vacuum tank, workers cannot scrape off the resin adhering to the inner wall of the resin mixing tank in real time, which easily leads to a large waste of resin. Furthermore, as time goes on, the resin adhering to the inner wall of the resin mixing tank solidifies, which greatly hinders the subsequent cleaning of the resin mixing tank. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the present invention provides a transformer coil vacuum casting device.

[0007] The present invention provides a transformer coil vacuum casting device, comprising a premixing device, a casting device, a vacuuming device, and a transformer coil mold. The premixing device includes a mounting frame, on which a resin mixing tank is disposed, and a stirring assembly is disposed at the upper end of the mounting frame. The stirring assembly includes a lifting hydraulic cylinder and a stirring rod. The stirring rod is located inside the resin mixing tank. The stirring rod has an inner hole in the middle and a stirring blade at the lower end. The stirring blade has a spray hole on its outside that communicates with the inner hole. The stirring rod is also equipped with auxiliary components. The resin mixing tank includes a scraper ring, an auxiliary plate is provided in the middle of the scraper ring, and a V-shaped discharge plate is provided at the bottom of the inner side of the resin mixing tank.

[0008] During the mixing stage, the equipment continuously adjusts the mixing area of ​​the mixing blades with the assistance of the mixing rod, mixing blades, and lifting hydraulic cylinder to reduce the mixing dead zones in the resin mixing tank and ensure the mixing effect of the resin in the resin mixing tank.

[0009] Preferably, the output end of the lifting hydraulic cylinder is provided with a mounting rod, and the side of the mounting rod near the resin mixing tank is provided with an extension rod. Mounting plates are provided on both the side of the extension rod away from the mounting rod and the side of the mounting rod away from the extension rod. A stabilizing component is provided on the side end of the mounting plate near the resin mixing tank. The stirring rod rotatably engages with the stabilizing component. A drive motor is provided on the side end of the mounting plate away from the resin mixing tank. A transmission component is provided at the output end of the drive motor. The drive motor is connected to the stirring rod for transmission through the transmission component. A protective shell is provided on the outside of the transmission component.

[0010] Preferably, the stabilizing component includes a stabilizing plate, which is disposed on the side of the mounting plate near the resin mixing tank. A stabilizing frame is disposed on the side of the stabilizing plate, and a stabilizing bearing is disposed inside the stabilizing frame. The stirring rod passes through the stabilizing bearing.

[0011] Preferably, the transmission assembly includes two transmission gears and a transmission belt. One transmission gear is located at the upper end of the stirring rod, and the other transmission gear is located at the output end of the drive motor. The two transmission gears are connected by a transmission belt.

[0012] Preferably, a connector is provided on the protective shell at the position of the stirring rod, the connector is rotatably connected to the upper end of the stirring rod, and the connector communicates with the inner hole.

[0013] During the cleaning phase, the equipment uses a scraper ring, a limiting block, auxiliary components, a stirring blade, an inner hole, and a stirring rod to spray water or high-temperature gas from the nozzles of the stirring blade, achieving the effect of cleaning and drying the inside of the resin mixing tank. The up-and-down movement of the scraper ring further ensures the cleaning effect inside the resin mixing tank.

[0014] Preferably, the resin mixing tank is divided into an upper tank and a lower tank, an auxiliary locking ring is provided on the outside of the connection between the upper tank and the lower tank, a tank lock is provided on the outside of the two auxiliary locking rings, and a sealing ring is provided at the connection between the upper tank and the lower tank.

[0015] Preferably, a magnetic ring is provided inside the scraper ring, a magnet is embedded in the inner side of the top of the upper barrel, the scraper ring slides up and down inside the upper and lower barrels, a limit block is also provided inside the lower barrel, and a discharge port is provided at the corresponding position of the V-shaped discharge plate in the lower barrel, the V-shaped discharge plate is made of thin stainless steel.

[0016] During the discharge and pouring stage, the equipment, with the assistance of the stirring rod, scraper ring, limiting block and auxiliary components, enables the scraper ring to scrape the resin off the inner wall of the resin mixing tank, reducing resin waste and keeping the resin in a stirred state, reducing the occurrence of sedimentation and solidification. At the same time, the V-shaped discharge plate promotes the discharge of resin from the resin mixing tank.

[0017] Preferably, the auxiliary component includes a protrusion, a limiting groove is provided on the side end of the stirring rod, the protrusion is located in the limiting groove, a spring is provided between the protrusion and the limiting groove, and the auxiliary component is located at the lower end of the stirring rod near the stirring blade.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By setting up components such as stirring blades and stirring rods, the equipment continuously adjusts the stirring area of ​​the stirring blades during the mixing stage, with the assistance of the stirring rods, stirring blades, and lifting hydraulic cylinders, thereby reducing the dead zones in the resin mixing tank and ensuring the mixing effect of the resin in the resin mixing tank.

[0019] 2. By setting up components such as scraper rings, limiting blocks, auxiliary components, stirring blades, and stirring rods, the equipment, during the discharge and pouring stage, uses the stirring rods, scraper rings, limiting blocks, and auxiliary components to scrape the resin off the inner wall of the resin mixing tank, reducing resin waste and keeping the resin in a stirred state, thus reducing sedimentation and solidification. At the same time, the V-shaped discharge plate promotes the discharge of resin from the resin mixing tank.

[0020] 3. By setting up components such as scraper rings, limiting blocks, auxiliary components, stirring blades, inner holes, and stirring rods, the equipment, during the cleaning stage, uses the assistance of scraper rings, limiting blocks, auxiliary components, stirring blades, inner holes, and stirring rods to spray water or high-temperature gas from the nozzles of the stirring blades, achieving the effect of cleaning and drying inside the resin mixing tank. Furthermore, the up-and-down movement of the scraper rings ensures the cleaning effect inside the resin mixing tank. Attached Figure Description

[0021] Figure 1This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the structure of the stabilizing component of the present invention; Figure 4 This is a schematic diagram of the structure of the resin mixing tank of the present invention; Figure 5 This is the invention Figure 2 Enlarged structural diagram at point A; Figure 6 This is a schematic diagram of the internal structure of the resin mixing tank of the present invention; Figure 7 This is a schematic diagram of the structure of the auxiliary component of the present invention.

[0022] Reference numerals: 1. Mounting frame; 2. Resin mixing tank; 3. Mixing assembly; 4. Stabilizing assembly; 5. Transmission assembly; 6. Protective shell; 201. Scraper ring; 202. Auxiliary plate; 203. V-shaped discharge plate; 204. Upper tank; 205. Lower tank; 206. Auxiliary locking ring; 207. Magnet; 208. Limiting block; 209. Discharge port; 301. Lifting hydraulic cylinder; 302. Mixing rod; 303. Inner hole; 304. Mixing blade; 305. Mounting rod; 306. Extension rod; 307. Mounting plate; 308. Drive motor; 309. Protrusion; 310. Limiting groove; 311. Spring; 401. Stabilizing plate; 402. Stabilizing frame; 601. Connector. Detailed Implementation

[0023] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0024] During the vacuum casting process of transformer coils, after vacuum casting is completed, the pressure inside the tank is steadily increased to 2 kg within 30 minutes and maintained at this pressure for 30 minutes. This process is automatically completed by an intelligent control system, which precisely controls the rate of pressure increase and the holding time. After the pressure holding period, the system automatically performs a pressure relief operation, making the casting material more compact under pressure, effectively reducing internal air bubbles and voids, and improving the density of the product's internal structure.

[0025] After the product leaves the can, it enters the stage of segmented heating and curing: 1. First stage: Curing at 80℃ for 2 hours. This temperature prevents the resin from settling due to excessive temperature in the early stages of curing, ensuring the basic molding structure of the product.

[0026] 2. Second stage: Heat to 100℃ and cure for 4 hours. In this stage, a visual monitoring system is used to detect the product dimensions in real time. Once a dimensional deviation is detected, the system will trigger an automatic material feeding mechanism to correct the product dimensions and ensure that the product dimensions meet high precision requirements.

[0027] 3. Third stage: Heat to 130℃ and cure for 8 hours. This high-temperature stage ensures the insulation performance and structural stability of the product, enabling it to meet the final performance requirements.

[0028] After the product exits the curing oven, it undergoes edge trimming by intelligent equipment. Advanced image recognition and mechanical control technology precisely controls the coil height within an error range of ±2mm, further improving the product's appearance quality and dimensional accuracy.

[0029] This pressure control process effectively improves the density of the castable and reduces internal defects. The combination of dimensional correction technology during the segmented curing process not only ensures the insulation performance of the product but also guarantees dimensional consistency, meeting the stringent quality requirements of high-end electrical equipment.

[0030] This process achieves fully automated control of the entire process from pressure regulation and segmented curing to post-processing, reducing manual intervention and significantly shortening the production cycle. Compared with traditional processes, production efficiency can be increased by more than 30%.

[0031] All parameters in the process are recorded and stored by the intelligent system. After each batch of production is completed, the data can be analyzed, and the parameters can be iterated through process optimization algorithms to achieve continuous improvement and optimization of the process in order to adapt to the production needs of different products.

[0032] like Figures 1 to 6 As shown, a transformer coil vacuum casting device of the present invention includes a premixing device, a casting device, a vacuuming device, and a transformer coil mold. The premixing device includes a mounting frame 1, on which a resin mixing tank 2 is mounted. A stirring component 3 is also mounted on the upper end of the mounting frame 1. During the vacuum casting of the transformer coil, the assembled transformer body needs to be pre-treated and the transformer coil mold needs to be installed first. Then, the resin is mixed in proportion using the premixing device. After that, the transformer coil mold is closed, and a vacuum is drawn on it using the vacuuming device. While maintaining a high vacuum in the transformer coil mold, the transformer coil is vacuum cast using the casting device. When the resin is mixed in proportion using the premixing device, the resin is first poured into the resin mixing tank 2 in proportion, and then the stirring component 3 is used to stir and mix the resin in the resin mixing tank 2.

[0033] The mixing assembly 3 includes a lifting hydraulic cylinder 301 and a mixing rod 302. The mixing rod 302 is located inside the resin mixing tank 2. A mixing blade 304 is provided at the lower end of the mixing rod 302. The rotation of the mixing rod 302 can drive the rotation of the mixing blade 304. The rotation of the mixing blade 304 can stir and mix the resin in the resin mixing tank 2. With the assistance of the lifting hydraulic cylinder 301, the height of the mixing rod 302 can be changed, thereby changing the height of the mixing blade 304, so as to change the stirring area of ​​the mixing blade 304, reduce the dead zone of resin stirring in the resin mixing tank 2, and make the stirring and mixing more uniform.

[0034] A mounting rod 305 is provided at the output end of the lifting hydraulic cylinder 301. An extension rod 306 is provided on the side of the mounting rod 305 near the resin mixing tank 2. Mounting plates 307 are provided on both the side of the extension rod 306 away from the mounting rod 305 and the side of the mounting rod 305 away from the extension rod 306. A stabilizing component 4 is provided on the side end of the mounting plate 307 near the resin mixing tank 2. The stirring rod 302 is rotatably engaged with the stabilizing component 4. A drive motor 308 is provided on the side end of the mounting plate 307 away from the resin mixing tank 2. A transmission component 5 is provided at the output end of the drive motor 308. The drive motor 308 is connected to the stirring rod 302 via the transmission component 5. 02. The transmission assembly 5 is equipped with a protective shell 6 on its outer side. After the lifting hydraulic cylinder 301 is started, the output end of the lifting hydraulic cylinder 301 will drive the installation rod 305 to rise and fall. The rise and fall of the installation rod 305 will rise and fall together with the extension rod 306, thereby causing the stabilizing assembly 4 to rise and fall. The stirring rod 302 rotates in coordination with the stabilizing assembly 4. Therefore, when the stabilizing assembly 4 rises and falls, the stirring rod 302 will also rise and fall. After the drive motor 308 is started, the output end of the drive motor 308 will drive the rotation of the stirring rod 302 through the assistance of the transmission assembly 5. The rotation of the stirring rod 302 is controlled by the assistance of the drive motor 308, making its speed controllable.

[0035] The stabilizing component 4 includes a stabilizing plate 401, which is located on the side of the mounting plate 307 near the resin mixing tank 2. A stabilizing frame 402 is provided on the side of the stabilizing plate 401, and a stabilizing bearing is provided inside the stabilizing frame 402. The stirring rod 302 passes through the stabilizing bearing. When the stirring rod 302 rotates, the rotation of the stirring rod 302 is made more stable with the assistance of the two stabilizing frames 402 and the stabilizing bearing inside them.

[0036] The transmission assembly 5 includes two transmission gears and a transmission belt. One transmission gear is located at the upper end of the stirring rod 302, and the other transmission gear is located at the output end of the drive motor 308. The two transmission gears are connected by a transmission belt. After the drive motor 308 starts, the output end of the drive motor 308 will drive the transmission gear to rotate. The transmission gear, with the assistance of the transmission belt, will drive the other transmission gear to rotate. The rotation of the other transmission gear will then drive the stirring rod 302 to rotate. With the assistance of the drive motor 308 and the transmission assembly 5, the rotation of the stirring rod 302 is provided with power, making the rotation of the stirring rod 302 stable and controllable.

[0037] The resin mixing tank 2 is divided into an upper tank 204 and a lower tank 205. An auxiliary locking ring 206 is provided on the outside of the connection between the upper tank 204 and the lower tank 205. A tank lock is provided on the outside of the two auxiliary locking rings 206, and a sealing ring is provided at the connection between the upper tank 204 and the lower tank 205. With the assistance of the tank lock, the upper tank 204 and the lower tank 205 are connected under the action of the auxiliary locking rings 206. In this way, the resin mixing tank 2 can be disassembled during subsequent cleaning, making cleaning more convenient and improving its recycling rate.

[0038] In the process of using this invention, when using the premixing device to mix resin, the premixing device needs to be installed in a large vacuum tank for operation in order to reduce the amount of gas entering the resin during the mixing process.

[0039] First, place the upper bucket 204 and the lower bucket 205 on the stirring rod 302. Use the copper lock to connect and fix the upper bucket 204 and the lower bucket 205. At this time, the stirring rod 302 and the stirring blade 304 are located inside the resin mixing tank 2. Then, move the position of the resin mixing tank 2 so that the stirring rod 302 is located at the center of the resin mixing tank 2.

[0040] Pour or inject the resin into the resin mixing tank 2 according to the ratio, evacuate the personnel, seal the large vacuum tank, evacuate the inside of the large vacuum tank, and then start the drive motor 308. After the drive motor 308 starts, the output end of the drive motor 308 will drive the rotation of the transmission gear, and the transmission gear will drive the rotation of another transmission gear through the assistance of the transmission belt. The rotation of the other transmission gear will drive the rotation of the stirring rod 302. The rotation of the stirring rod 302 can drive the rotation of the stirring blade 304, and the rotation of the stirring blade 304 can stir and mix the resin in the resin mixing tank 2.

[0041] At the same time, the lifting hydraulic cylinder 301 is started and controlled to keep the output end of the lifting hydraulic cylinder 301 in a reciprocating lifting state. In this state, the mounting rod 305 will also reciprocate. The reciprocating lifting of the mounting rod 305, with the assistance of the extension rod 306 and the stabilizing component 4, causes the stirring rod 302 to rise and fall, thereby changing the stirring area of ​​the stirring blade 304, reducing the dead angle of resin stirring in the resin mixing tank 2, and making the stirring and mixing more uniform.

[0042] After the resin is mixed evenly, the casting device uses a pipe to extract the resin from the resin mixing tank 2 and pour it into the transformer coil mold.

[0043] During operation, as pouring progresses, the resin level in the resin mixing tank 2 drops. Since resin is viscous, a large amount of resin easily adheres to the inner wall of the mixing tank 2. Because the equipment is located inside a large vacuum tank, workers cannot scrape off the resin adhering to the inner wall of the mixing tank 2 in real time, leading to significant resin waste. Furthermore, over time, the resin adhering to the inner wall of the mixing tank 2 hardens, greatly hindering subsequent cleaning. Therefore, the following solution is proposed: like Figures 1 to 7 As shown, the stirring rod 302 has an inner hole 303 in the middle, and the stirring blade 304 has a spray hole on the outside that communicates with the inner hole 303. The protective shell 6 has a connector 601 at the position of the stirring rod 302. The connector 601 is rotatably connected to the upper end of the stirring rod 302 and communicates with the inner hole 303. The upper end of the connector 601 is provided with a connecting pipe, which can be connected to an external water pump or steam generator. If the connecting pipe is connected to an external water pump, then during subsequent cleaning, water or chemical solvents can be supplied by the auxiliary water pump. Taking water as an example, under the action of the water pump, water will enter the inner hole 303 of the stirring rod 302. Then, the water in the inner hole 303 will be sprayed out through the spray hole on the outside of the stirring blade 304, thereby rinsing the inner wall of the resin mixing tank 2, which improves the convenience of equipment cleaning.

[0044] The resin mixing tank 2 includes a scraper ring 201 with an auxiliary plate 202 in the middle. A V-shaped discharge plate 203 is provided at the bottom of the inner side of the resin mixing tank 2. When the scraper ring 201 descends with the assistance of the auxiliary plate 202, the scraper ring 201 can scrape the resin adhering to the inner wall of the resin mixing tank 2 downwards, so as to ensure that the resin in the resin mixing tank 2 is discharged more fully, reducing resin waste and residue in the resin mixing tank 2. The V-shaped discharge plate 203 is conducive to the complete discharge of resin in the resin mixing tank 2.

[0045] An auxiliary component is also provided on the stirring rod 302, including a protrusion 309. A limiting groove 310 is provided on the side end of the stirring rod 302, and the protrusion 309 is located in the limiting groove 310. A spring 311 is provided between the protrusion 309 and the limiting groove 310. The auxiliary component is located at the lower end of the stirring rod 302 near the stirring blade 304. A limiting block 208 is also provided inside the lower tank 205. When the stirring rod 302 moves upward continuously, the protrusion 309 will contact the auxiliary plate 202. Under the pressure and the action of the protrusion 309, the protrusion 309... 09 will retract into the limiting groove 310. Since the auxiliary plate 202 can no longer rise, the protrusion 309 will then cross the auxiliary plate 202. When the stirring rod 302 descends, the protrusion 309 will form a limit. With the assistance of the protrusion 309 and the auxiliary plate 202, the descent of the stirring rod 302 will cause the scraper ring 201 to move downward. After the scraper ring 201 descends to the limiting block 208, due to the resistance of the limiting block 208, the protrusion 309 will retract into the limiting groove 310 under pressure, causing the protrusion 309 to cross the auxiliary plate 202 again.

[0046] The scraper ring 201 has a magnetic ring inside, and a magnet 207 is embedded in the inner side of the top of the upper barrel 204. The scraper ring 201 slides up and down inside the upper barrel 204 and the lower barrel 205. The lower barrel 205 has a discharge port 209 at the corresponding position of the V-shaped discharge plate 203. The V-shaped discharge plate 203 is made of thin stainless steel. In the initial state, the scraper ring 201 is located at the upper end of the upper barrel 204 by the attraction between the internal magnetic ring and the magnet 207. The material of the V-shaped discharge plate 203 makes it elastic, which is conducive to the resin at the upper end of the V-shaped discharge plate 203 sliding down and being discharged.

[0047] During the use of this invention, in the mixing stage, the reciprocating lifting distance of the lifting hydraulic cylinder 301 controlled by the equipment is a. During this process, the protrusion 309 will not contact the auxiliary plate 202. In the discharge and pouring stage and the cleaning stage in the resin mixing tank 2, the reciprocating lifting distance of the lifting hydraulic cylinder 301 controlled by the equipment is b, where b > a.

[0048] During the mixing stage, when the reciprocating lifting distance of the hydraulic cylinder 301 controlled by the equipment is a, as the stirring rod 302 rises and rotates, the stirring blade 304 can continuously stir and mix the resin in the resin mixing tank 2. Moreover, the stirring area of ​​the stirring blade 304 is in a state of continuous up and down movement, which reduces the stirring dead angle in the resin mixing tank 2 and makes the resin mixing effect in the resin mixing tank 2 better.

[0049] During the discharge and pouring stage in the resin mixing tank 2, the equipment controls the reciprocating lifting distance of the lifting hydraulic cylinder 301 to be b. During this process, as the stirring rod 302 rises, the protrusion 309 will contact the auxiliary plate 202. Under the pressure and the action of the protrusion 309, the protrusion 309 will retract into the limiting groove 310. Since the auxiliary plate 202 can no longer rise, the protrusion 309 will then cross the auxiliary plate 202. After that, the pouring device and the lifting hydraulic cylinder 301 will work together. That is, the pouring speed of the pouring device is related to the descent speed of the output end of the lifting hydraulic cylinder 301. When the pouring speed of the pouring device is fast, the liquid level in the resin mixing tank 2 will drop fast. At this time, the descent speed of the output end of the lifting hydraulic cylinder 301 will also be fast.

[0050] When the output end of the lifting hydraulic cylinder 301 descends, the protrusion 309 contacts the auxiliary plate 202 and generates a downward thrust, causing the scraper ring 201 to move downward against the magnetic force. During the downward movement of the scraper ring 201, the scraper ring 201 can scrape off the resin adhering to the inner wall of the resin mixing tank 2, so as to ensure the full utilization of the resin in the resin mixing tank 2. In this process, the stirring rod 302 is always in a rotating state to prevent the resin in the resin mixing tank 2 from solidifying or precipitating.

[0051] When the scraper ring 201 descends and contacts the limiting block 208, due to the resistance of the limiting block 208, the protrusion 309 will retract into the limiting groove 310 under pressure, allowing the protrusion 309 to cross the auxiliary plate 202 again. At the same time, the speed of the drive motor 308 will be controlled to decrease. As the stirring rod 302 continues to descend, the stirring blade 304 will contact the V-shaped discharge plate 203. The material of the V-shaped discharge plate 203 makes it elastic, which is conducive to the resin at the upper end of the V-shaped discharge plate 203 sliding down and being discharged.

[0052] When the resin in the resin mixing tank 2 has been used up and cleaning is required, the connecting pipe at the upper end of the connector 601 is connected to an external water pump or steam generator according to the cleaning needs. Taking water as an example, under the action of the water pump, water will enter the inner hole 303 of the stirring rod 302. Then, the water in the inner hole 303 will be sprayed out through the spray hole on the outside of the stirring blade 304, thereby rinsing the inner wall of the resin mixing tank 2. During this process, since the stroke of the lifting hydraulic cylinder 301 is b, the scraper ring 201 will also rise and fall. After cleaning the inner wall of the resin mixing tank 2, the lifting hydraulic cylinder 301 performs a downward stroke of b and an upward stroke of a, so that the stirring rod 302, with the assistance of the protrusion 309, sends the scraper ring 201 to the initial position for the next use. Before the next use, the connecting pipe at the upper end of the connector 601 is connected to the external steam generator, and high-temperature gas is sprayed out through the nozzle on the outside of the stirring blade 304 to dry and preheat the inner wall of the resin mixing tank 2, thereby improving the mixing effect of the equipment on the resin.

[0053] The main functions achieved by this invention are as follows: By setting components such as the scraper ring 201, the limiting block 208, auxiliary components, the stirring blade 304, the inner hole 303, and the stirring rod 302, the equipment continuously adjusts the stirring area of ​​the stirring blade 304 during the mixing stage, with the assistance of the stirring rod 302, the stirring blade 304, and the lifting hydraulic cylinder 301, thereby reducing the stirring dead zones in the resin mixing tank 2 and ensuring the stirring effect of the resin in the resin mixing tank 2. During the discharge and pouring stage, with the assistance of the stirring rod 302, the scraper ring 201, the limiting block 208, and the auxiliary components, the scraper ring 201 can effectively clean the resin. The resin inside the resin mixing tank 2 is scraped off, reducing resin waste and keeping the resin in a stirred state, thus reducing sedimentation and solidification. At the same time, the V-shaped discharge plate 203 promotes the discharge of resin from the resin mixing tank 2. During the cleaning stage, with the assistance of the scraper ring 201, the limiting block 208, auxiliary components, the stirring blade 304, the inner hole 303, and the stirring rod 302, water or high-temperature gas is sprayed from the nozzle of the stirring blade 304 to achieve the effect of cleaning and drying inside the resin mixing tank 2. The up and down movement of the scraper ring 201 further ensures the cleaning effect inside the resin mixing tank 2.

[0054] The transformer coil vacuum casting device of the present invention can be installed, connected or set in a common mechanical manner, and can be implemented as long as it can achieve its beneficial effect.

[0055] All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0056] The above are merely preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A vacuum pouring apparatus for transformer coils comprising a premixing device, a pouring device, a vacuum extraction device and a transformer coil mold, characterized in that, The premix device comprises a mounting frame (1) provided with a resin mixing barrel (2), and a stirring assembly (3) is further arranged at the upper end of the mounting frame (1); The stirring assembly (3) comprises a lifting hydraulic cylinder (301) and a stirring rod (302), the stirring rod (302) is located in the resin mixing barrel (2), an inner hole (303) is arranged in the middle of the stirring rod (302), stirring blades (304) are arranged at the lower end of the stirring rod (302), the outer part of the stirring blades (304) is provided with a plurality of spray holes in communication with the inner hole (303), and an auxiliary assembly is further arranged on the stirring rod (302). The resin mixing barrel (2) comprises a scraping ring (201), an auxiliary plate (202) is arranged in the middle of the scraping ring (201), and a V-shaped discharging plate (203) is arranged at the inner bottom of the resin mixing barrel (2).

2. The transformer coil vacuum-potting apparatus of claim 1, wherein The output end of the lifting hydraulic cylinder (301) is provided with a mounting rod (305), one side of the mounting rod (305) close to the resin mixing barrel (2) is provided with an extension rod (306), and the extension rod (306) is provided with a mounting plate (307) on the side away from the mounting rod (305) and on the side of the mounting rod (305) away from the extension rod (306), the side end of the mounting plate (307) close to the resin mixing barrel (2) is provided with a stabilizing assembly (4), the stirring rod (302) is rotationally connected with the stabilizing assembly (4), the side end of the mounting plate (307) away from the resin mixing barrel (2) is provided with a driving motor (308), the output end of the driving motor (308) is provided with a transmission assembly (5), the driving motor (308) is connected with the stirring rod (302) through the transmission assembly (5), and the outer side of the transmission assembly (5) is provided with a protective shell (6).

3. The transformer coil vacuum-potting apparatus of claim 2, wherein The stabilizing assembly (4) comprises a stabilizing plate (401), which is arranged at the side end of the mounting plate (307) close to the resin mixing barrel (2), and a stabilizing frame (402) is arranged at the side end of the stabilizing plate (401), the stabilizing frame (402) is provided with a stabilizing bearing, and the stirring rod (302) penetrates through the stabilizing bearing.

4. The transformer coil vacuum-potting apparatus of claim 2, wherein The transmission assembly (5) comprises two transmission gears and a transmission belt, one of the transmission gears is arranged at the upper end of the stirring rod (302), the other transmission gear is arranged at the output end of the driving motor (308), and the two transmission gears are connected through the transmission belt.

5. The transformer coil vacuum-potting apparatus of claim 2, wherein A connector (601) is arranged on the protective shell (6) at the position of the stirring rod (302), the connector (601) is rotationally connected with the upper end of the stirring rod (302), and the connector (601) is in communication with the inner hole (303).

6. The transformer coil vacuum-potting apparatus of claim 1, wherein The resin mixing barrel (2) is divided into an upper barrel (204) and a lower barrel (205), auxiliary locking rings (206) are arranged outside the connection positions of the upper barrel (204) and the lower barrel (205), barrel locks are arranged outside the two auxiliary locking rings (206), and a sealing ring is arranged at the connection position of the upper barrel (204) and the lower barrel (205).

7. The transformer coil vacuum-potting apparatus of claim 6, wherein The scraping ring (201) is internally provided with a magnetic ring, a magnet (207) is embedded in the top inner side of the upper barrel (204), the scraping ring (201) slides up and down on the inner sides of the upper barrel (204) and the lower barrel (205), the inner side of the lower barrel (205) is further provided with a limiting block (208), the lower barrel (205) is provided with a discharge port (209) at the corresponding position of the V-shaped discharge plate (203), and the V-shaped discharge plate (203) is made of thin stainless steel.

8. The transformer coil vacuum-potting apparatus of claim 1, wherein The auxiliary assembly comprises a protrusion (309), the side end of the stirring rod (302) is provided with a limiting groove (310), the protrusion (309) is located in the limiting groove (310), a spring (311) is arranged between the protrusion (309) and the limiting groove (310), and the auxiliary assembly is located at the position close to the stirring blade (304) of the lower end of the stirring rod (302).

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