Paint dipping and drying device and method for transformer coil

Abstract

The invention relates to the technical field of transformer coil production, in particular to a paint dipping and drying device of a transformer coil and a method thereof.The paint dipping and drying device comprises a base, a drying part and a paint dipping part are arranged at the two ends of the top of the base respectively, and the drying part comprises a support fixed to the top of the base and a drying cylinder fixed to the support; a heating pipe is mounted on the inner side of the drying cylinder; a tool jig and a feeding steering mechanism are arranged in the drying cylinder, and a cover closing mechanism is arranged at the end, close to the paint dipping part, of the drying cylinder. The paint dipping part is composed of a station rotating mechanism for driving a coil to rotate and convey and a painting assembly for stirring paint, the paint dipping part further comprises a material level switching mechanism, and the paint dipping and drying method comprises the steps that starting is prepared; paint dipping and paint draining; clamping the coil to be dried; sealing a cover; rotary drying is carried out; according to the device, rotary conveying of the target coil between different stations can be achieved, and transposition type rapid drying of the paint dipping coil is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of transformer coil production, in particular to a transformer coil varnish dipping and drying device and a method thereof. Background Art

[0002] The coil is one of the core components of the transformer, which plays a role in converting magnetic energy into electrical energy and changing the voltage and current in the transformer operation process. During the production process of the coil, the surface of the coil needs to be painted and dried to ensure the insulation performance of the coil.

[0003] The prior art discloses a Chinese patent with publication number CN 206558363 U (IPC classification number H01F41 / 04): an integrated device for varnishing and drying transformer coils, and discloses a lifting device and a rotating device. By controlling the extension or shortening of the cylinder, the placement barrel is raised or lowered, so that the coil can be fully immersed in the paint or fully leave the paint. At the same time, the motor rotates to rotate the coil, so that the coil can be evenly painted and dried.

[0004] However, the above-mentioned prior art still has certain defects, that is, during use, after each paint dipping and drying, the coil needs to be manually replaced for the next round of operation, the processing continuity is poor, and the paint is immediately dried in the drying area after the paint dipping is completed, which easily causes the un-leached paint to clump together and attach to the surface of the coil, affecting the appearance of the coil. In addition, drying in an open environment easily causes a large amount of heat waste. Summary of the invention

[0005] The object of the present invention is to provide a varnish dipping and drying device for transformer coils and a method thereof to solve the problems raised in the above-mentioned background technology.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A varnish dipping and drying device for transformer coils, comprising a base, a drying part and a varnish dipping part are respectively arranged at two ends of the top of the base, the drying part comprises two brackets fixed on the top of the base, a drying cylinder is fixedly installed between the two brackets, and a heating pipe is installed inside the drying cylinder;

[0008] The drying cylinder is provided with a fixture for clamping the paint-impregnated coil to be dried and a feeding and steering mechanism for pushing the fixture in and out of the drying cylinder and driving the fixture to continuously rotate, and a closing mechanism is provided at one end of the drying cylinder close to the paint-impregnating part;

[0009] The paint dipping section is composed of a station rotation mechanism for driving the coil to rotate and transport between the material changing station, the paint dipping station, the paint pouring station and the loading and unloading station, and a painting component for stirring the paint. The paint dipping section also includes a material level switching mechanism arranged on the top of the base for automatically switching the position of the finished coil and the coil to be added.

[0010] In a preferred embodiment, the lid closing mechanism comprises a seat block fixed on the outside of the bracket and a driving motor 1 fixed on the top of the corresponding bracket, a driving motor 2 is fixedly installed on one side of the seat block, and a gear 1 is fixedly connected to the end of the output shaft of the driving motor 2, a swing arm is fixedly connected to the end of the output shaft of the driving motor 1, a connecting rod is provided at the bottom of the swing arm, and a push-pull assembly is provided between the connecting rod and the swing arm;

[0011] The inner side of the drying cylinder is provided with an annular groove, the end of the drying cylinder is provided with a tooth groove connected with the annular groove, the end of the connecting rod away from the swing arm is rotatably mounted with a cover plate through a bearing, the outer edge of the cover plate is provided with a tooth block 1 adapted to the tooth groove, and a rack is fixedly provided at a position on the outer side of the cover plate corresponding to the gear 1;

[0012] The push-pull assembly includes a cross slot one opened at the bottom of the swing arm and an electric push rod one fixedly installed at the end of the swing arm, a cross block one fixedly connected to the connecting rod is slidably installed inside the cross slot one, and the telescopic end of the electric push rod one extends into the cross slot one and is fixedly connected to the cross block one.

[0013] In a preferred embodiment, the feed steering mechanism comprises two I-shaped guide rails fixed on the inner side of the drying cylinder and a slide table located on the top of the I-shaped guide rails, a slide seat slidably mounted on the I-shaped guide rails is fixedly connected to the bottom of the slide table, a cross groove 2 is provided in the middle of the slide table, a cross block 2 is slidably mounted inside the cross groove 2, a carrier plate is rotatably mounted in the center of the cross block 2, an electric push rod 2 is fixedly mounted on the outer side of the drying cylinder, and the telescopic end of the electric push rod 2 extends to the inside of the drying cylinder and is fixedly connected to the slide table;

[0014] The feeding steering mechanism also includes a seat frame slidably mounted on the inner side of the drying cylinder and a servo motor 1 fixedly mounted on the outer side of the drying cylinder. A screw is rotatably mounted on the middle of the seat frame along the moving direction of the cross block 2. The end of the output shaft of the servo motor 1 is fixedly connected to a transverse shaft extending to the inside of the drying cylinder. A propulsion block slidably mounted on the inside of the seat frame is threadedly sleeved on the outer side of the screw. A rotating shaft fixedly connected to the carrier plate is rotatably mounted on the top of the propulsion block.

[0015] A toothed plate is fixedly installed inside the drying cylinder, a second gear meshing with the toothed plate is fixedly sleeved outside the rotating shaft, a cross hole is opened at one end of the screw facing the horizontal axis, a cross bar is fixedly connected to the end of the horizontal axis, and the cross bar is movably inserted into the cross hole.

[0016] In a preferred embodiment, the tooling fixture comprises a collecting trough opened on the top of the carrying plate, a plurality of protrusions evenly distributed in an annular shape are fixedly provided on the inner side of the collecting trough, and a plurality of positioning components evenly distributed in an annular shape are provided on the top of the carrying plate.

[0017] In a preferred embodiment, the positioning assembly includes a sliding groove extending through the outer side of the carrier plate, the upper clamping strip and the lower clamping strip are slidably connected to the top and bottom of the inner cavity of the sliding groove respectively, and a tooth block 2 is fixedly provided on the opposite sides of the upper clamping strip and the lower clamping strip, and a gear 3 is rotatably installed in the middle of the inner cavity of the sliding groove through a round rod, and the gear 3 is meshed between the tooth blocks 2 on the upper clamping strip and the lower clamping strip;

[0018] The upper clamping strip and the lower clamping strip are both provided with a retaining groove at one end away from the collecting groove, a retaining strip corresponding to the retaining groove is fixedly provided at the bottom of the inner side of the sliding groove, a guide rod corresponding to the lower clamping strip is fixedly provided on the outer side of the retaining strip, an insertion hole is provided on the outer side of the lower clamping strip, the end of the guide rod is movably inserted into the insertion hole, and a spring 1 is movably sleeved on the outer side of the guide rod to fix the retaining strip and the lower clamping strip;

[0019] A vertical rod is movably penetrated at one end of the upper clamping strip near the collecting slot, a baffle and a triangular oblique block are fixedly connected to the top and bottom of the vertical rod respectively, and a spring 2 fixedly connected to the baffle and the upper clamping strip is movably sleeved on the outer side of the vertical rod.

[0020] In a preferred embodiment, the workstation rotation mechanism includes a servo motor 2 fixedly mounted on the bottom of the base, the output shaft end of the servo motor 2 is fixedly connected to a main shaft that movably passes through the base, a disc is fixedly provided on the top of the main shaft, a plurality of electric push rods 3 evenly distributed in a ring shape are fixedly mounted on the top of the disc, and a pick-and-place assembly is provided at the bottom of the disc corresponding to the position of each electric push rod 3.

[0021] In a preferred embodiment, the pick-and-place assembly includes a cylinder fixedly connected to the telescopic end of the corresponding electric push rod three, a cross slot three is opened in the middle of the cylinder, a cross is slidably connected inside the cross slot three, and an electric push rod four is fixedly installed between the inner bottom of the cross slot three and the cross;

[0022] A U-shaped seat is fixedly provided at the bottom end of the outer side of the cylinder, an L-shaped frame is rotatably installed on the inner side of the U-shaped seat through a round rod, a round ball is fixedly connected to the top of the L-shaped frame, the bottom of the U-shaped seat is fixedly connected to an arc rod that movably penetrates the corresponding L-shaped frame, and an arc spring that is movably sleeved on the outer side of the arc rod and fixedly connects the U-shaped seat and the L-shaped frame.

[0023] In a preferred embodiment, the painting assembly includes a main gear fixedly sleeved on the outside of the main shaft and a paint bucket fixed on the top of the base, a reflux trough frame is fixedly connected to the outside of the paint bucket, a paddle is installed on the bottom of the inner side of the paint bucket through a vertical axis, and the bottom end of the vertical axis connecting the paddle extends to the outer fixed sleeve of the bottom of the base and is provided with a sub-gear meshing with the main gear.

[0024] In a preferred embodiment, the material level switching mechanism includes a bracket fixed on the top of the base, a servo motor three is fixedly installed on the bottom of the bracket, a pendulum seat is attached to the top of the bracket, and the output shaft of the servo motor three movably passes through one end of the bracket and is fixedly connected to the pendulum seat, and two sink grooves are provided on the top of the pendulum seat.

[0025] The present invention also provides a method for varnish dipping and drying a transformer coil using the above-mentioned varnish dipping and drying device for the transformer coil, which specifically includes the following operating steps:

[0026] S1. Prepare to start: open the cover plate, and use the electric push rod 2 to push the slide out of the drying cylinder along the I-shaped guide rail, so that the carrier plate with the tooling fixture is located directly under the loading station. At the same time, place the coils to be dipped in paint and dried in the sink on the swing seat, and make one of them located directly under the material removal station for standby;

[0027] S2, Dipping and draining: Use the pick-and-place assembly on the station rotary mechanism to clamp the coil to be dipped and dried at the material-retrieving station and remove it from the sink. Use the servo motor 2 to drive the main shaft to drive the clamped coil to rotate above the paint bucket, and let the electric push rod 3 push the clamped coil to be completely immersed in the paint. After the dip is completed, let the coil completely leave the paint bucket, and use the servo motor 2 to drive the main shaft to rotate so that the coil that has completed the dip is switched to the drain station for draining.

[0028] S3, clamping the coil to be dried: using servo motor 2 to drive the main shaft to rotate so that the coil that has been painted is switched to the loading station, and the electric push rod 3 pushes the coil that has been painted to sink to the top of the carrier plate, and uses the tooling fixture on the carrier plate to clamp and limit the coil to be dried;

[0029] S4, sealing: After the slide table carrying the coil to be dried is pulled into the drying cylinder along the I-shaped guide rail by the electric push rod 2, the drying cylinder is sealed by the cover closing mechanism;

[0030] S5, rotary drying: after the cover plate and the drying cylinder are covered, the servo motor 1 is used to drive the horizontal axis to rotate, so that it drives the screw to rotate, and the push block moves back and forth along the screw. The meshing setting between the gear 2 on the outer side of the rotating shaft and the tooth plate is used to rotate the carrier plate mounted on the cross block 2 and carrying the coil to be dried, so that the coil is evenly heated;

[0031] S6, unloading and changing materials: After the coil is dried, the slide is pushed out of the drying cylinder along the I-shaped guide rail using the electric push rod 2, and the corresponding pick-and-place assembly on the station rotary mechanism is used to clamp the coil and lift it upward, so that the coil is separated from the tooling fixture and switched to the material picking position for unloading. The servo motor 3 drives the swing seat to rotate, completing the switching between the finished product position and the position to be processed.

[0032] Beneficial effects of the present invention:

[0033] 1. The present invention drives the screw to rotate by rotating the horizontal axis, so that the propulsion block performs reciprocating horizontal linear motion along the seat frame, and uses the tooth plate to drive the gear 2 that moves synchronously with the propulsion block to rotate positively and negatively alternately, thereby driving the carrier plate carrying the paint-impregnated coil to rotate positively and negatively alternately synchronously, so that the airflow near the coil is accelerated, so that the paint-impregnated coil is quickly and evenly heated and dried;

[0034] 2. The present invention utilizes the target coil that continues to move downward passively to squeeze the inclined surface on the lower clamping strip, so that the lower clamping strip shrinks into the sliding groove and drives the gear 3 to rotate, thereby driving one end of the triangular inclined block installed on the upper clamping strip to extend out of the sliding groove, and utilizing the restoring force of the spring 2 to make the inclined surface of the triangular inclined block tightly press against the upper edge of the bottom end of the core frame on the target coil, so as to limit the peripheral side surface of the bottom end of the core frame of the target coil and buckle the upper end surface of the bottom end of the core frame of the target coil at the same time;

[0035] 3. The present invention utilizes a step-by-step rotating main shaft to drive the disc to rotate, allowing the pick-and-place assembly to clamp the target coil and automatically rotate and transport it between the material changing station, the paint dipping station, the paint draining station and the loading and unloading station, thereby improving the continuity of the processing process. In addition, during the rotation of the main shaft, the meshing main gear and the sub-gear are used to indirectly drive the paddles to transfer the paint inside the paint bucket. On the one hand, it can avoid the generation of sediment in the static paint, and on the other hand, it can keep the paint inside the paint bucket in a flowing state, thereby improving the paint dipping effect of the target coil immersed in the paint bucket. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 It is a schematic diagram of the overall structure of the drying cylinder of the present invention in a closed state;

[0038] Figure 2 It is a schematic diagram of the overall structure of the drying cylinder of the present invention in an open state;

[0039] Figure 3 It is a schematic structural diagram of the feeding and steering mechanism of the present invention from a first viewing angle;

[0040] Figure 4 It is a schematic structural diagram of the feed steering mechanism of the present invention from a second viewing angle;

[0041] Figure 5 It is a schematic diagram of a partially expanded structure of the feed steering mechanism of the present invention;

[0042] Figure 6 It is a schematic diagram of the assembly structure of the cross block 2 and the carrier plate of the present invention;

[0043] Figure 7 The present invention Figure 6 The overall top view of the

[0044] Figure 8 The present invention Figure 7 Schematic diagram of the AA section structure;

[0045] Fig. 9 The present invention Figure 8 A schematic diagram of the structure enlargement of part A;

[0046] Fig.10 It is a structural schematic diagram of the cover closing mechanism of the present invention;

[0047] Fig.11 It is a schematic diagram of the push-pull assembly structure of the present invention;

[0048] Fig.12 It is a schematic diagram of the structure of the pick-and-place assembly of the present invention;

[0049] Fig.13 It is a schematic diagram of the structure of the painting assembly of the present invention;

[0050] Fig.14 It is a structural schematic diagram of the material level switching mechanism of the present invention;

[0051] Fig.15 It is a schematic diagram of the coil product structure of the present invention.

[0052] The reference numerals in the figure are as follows: 1, base; 2, bracket; 3, drying cylinder; 4, cover closing mechanism; 41, seat block; 42, gear one; 43, ring groove; 44, tooth groove; 45, swing arm; 46, connecting rod; 47, push-pull assembly; 471, cross groove one; 472, cross block one; 473, electric push rod one; 48, cover plate; 49, rack; 410, tooth block one; 5, feed steering mechanism; 51, I-shaped guide rail; 5 2. Slide; 53. Slide seat; 54. Cross slot 2; 55. Cross block 2; 56. Carrying plate; 57. Electric push rod 2; 58. Seat frame; 59. Horizontal axis; 510. Screw; 511. Cross bar; 512. Cross hole; 513. Push block; 514. Rotating shaft; 515. Gear 2; 516. Tooth plate; 6. Fixture; 61. Collecting trough; 62. Boss; 63. Positioning assembly; 631. Sliding slot; 632, upper clamping strip; 633, lower clamping strip; 634, retaining slot; 635, retaining strip; 636, gear three; 637, gear block two; 638, guide rod; 639, spring one; 6310, vertical rod; 6311, retaining piece; 6312, triangular inclined block; 6313, spring two; 7, station rotary mechanism; 71, spindle; 72, disc; 73, electric push rod three; 74, pick-and-place assembly; 741, cylinder ; 742, cross slot three; 743, cross; 744, electric push rod four; 745, U-shaped seat; 746, L-shaped frame; 747, ball; 748, arc rod; 749, arc spring; 8, painting assembly; 81, paint bucket; 82, reflux trough frame; 83, main gear; 84, sub-gear; 85, paddle; 9, material level switching mechanism; 91, bracket; 92, swing seat; 93, trough; 10, heating tube. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] The transformer in the present invention is a kind of power device in the smart grid industry, and the coil is a part of the transformer. The paint dipping and drying device is a kind of equipment used to manufacture the coil. In the actual production process, it is used to perform paint dipping and drying treatment on the coil to ensure the insulation performance of the coil.

[0055] Refer to the instruction manual Figure 1-2A varnish dipping and drying device for transformer coils according to an embodiment of the present invention comprises a base 1, a drying part and a varnish dipping part are respectively provided at two ends of the top of the base 1, the drying part comprises two brackets 2 fixed on the top of the base 1, a drying cylinder 3 is fixedly installed between the two brackets 2, and a heating tube 10 is installed inside the drying cylinder 3;

[0056] Inside the drying cylinder 3, there are provided a fixture 6 for clamping the paint-impregnated coil to be dried and a feeding and steering mechanism 5 for pushing the fixture 6 in and out of the drying cylinder 3 and driving the fixture 6 to continuously rotate, and a cover closing mechanism 4 is provided at one end of the drying cylinder 3 close to the paint-impregnating part;

[0057] The paint dipping section is composed of a station rotating mechanism 7 for driving the coil to rotate and transport between the material changing station, the paint dipping station, the paint pouring station and the material loading and unloading station, and a painting component 8 for stirring the paint. The paint dipping section also includes a material level switching mechanism 9 arranged on the top of the base 1 for automatically switching the position of the finished coil and the coil to be added.

[0058] It should be noted that the present invention uses a rotary conveying method to drive the target coil to be rotary conveyed between the material changing station, the paint dipping station, the paint pouring station and the loading and unloading station, and cooperates with the feed steering mechanism 5 to push the tooling fixture 6 to alternately switch between the drying station and the loading and unloading station, thereby realizing the automatic continuous paint dipping and drying of the target coil.

[0059] Specifically, Figure 10-11 As shown, the lid closing mechanism 4 includes a seat block 41 fixed to the outside of the bracket 2 and a driving motor 1 fixed to the top of the corresponding bracket 2, a driving motor 2 is fixedly installed on one side of the seat block 41, and a gear 1 42 is fixedly connected to the end of the output shaft of the driving motor 2, and a swing arm 45 is fixedly connected to the end of the output shaft of the driving motor 1, and an L-shaped connecting rod 46 is provided at the bottom of the swing arm 45, and a push-pull assembly 47 is provided between the connecting rod 46 and the swing arm 45;

[0060] An annular groove 43 is provided inside the drying cylinder 3, and a tooth groove 44 connected to the annular groove 43 is provided at the end of the drying cylinder 3. A cover plate 48 is rotatably mounted on the end of the connecting rod 46 away from the swing arm 45 through a bearing. A tooth block 410 adapted to the tooth groove 44 is provided at the outer edge of the cover plate 48, and a rack 49 is fixedly provided at the position of the outer side of the cover plate 48 corresponding to the gear 42. The thickness of the annular groove 43, the tooth groove 44 and the tooth block 410 are all equal, and the cover plate 48 is provided with a tooth block 410 on the outer side of the cover plate 48. When the tooth block 410 is completely in the annular groove 43, the rack 49 and the gear 42 are in meshing state. After the tooth block 410 on the cover plate 48 passes through the tooth groove 44 and enters the annular groove 43, the rotating gear 42 can be used to drive the rack 49 to drive the cover plate 48 to rotate, so that the tooth block 410 is switched from the state of overlapping with the corresponding tooth groove 44 to the position between two adjacent tooth grooves 44 at the corresponding position, so that the cover plate 48 is fastened and does not easily dislocate.

[0061] The push-pull assembly 47 includes a cross slot 471 opened at the bottom of the swing arm 45 and an electric push rod 473 fixedly installed at the end of the swing arm 45, a cross block 472 fixedly connected to the connecting rod 46 is slidably installed inside the cross slot 471, and the telescopic end of the electric push rod 473 extends to the inside of the cross slot 471 and is fixedly connected to the cross block 472.

[0062] It should be noted that, in the initial state, the cover plate 48 is buckled to the port position of the drying cylinder 3, and the tooth block 410 on the cover plate 48 is located between two adjacent tooth grooves 44 at the corresponding position. In the process of opening the cover plate 48 at the port position of the drying cylinder 3, the gear 42 is driven by the driving motor 2 to rotate, thereby driving the rack 49 to drive the cover plate 48 to rotate a certain angle, so that the tooth block 410 on the cover plate 48 is switched from the position between the two adjacent tooth grooves 44 at the corresponding position to the state of overlapping with the tooth groove 44 at the corresponding position, and then the electric push rod 473 pushes the cross block 472 to slide on the swing arm 45, so that the tooth block 410 is completely separated from the tooth groove 44, and then the swing arm 45 is driven by the driving motor 1 to rotate 90°, becoming as shown in the figure. Fig.10 The cover is in the open state shown. On the contrary, the cover plate 48 can be quickly snapped onto the end position of the drying cylinder 3.

[0063] Specifically, Figure 1 and Figure 3-5 As shown, the feed steering mechanism 5 includes two I-shaped guide rails 51 fixed on the inner side of the drying cylinder 3 and a slide 52 located on the top of the I-shaped guide rails 51. The bottom of the slide 52 is fixedly connected to a slide seat 53 slidably mounted on the I-shaped guide rails 51. In the process of the slide 52 sliding along the I-shaped guide rails 51, the slide seat 53 at the bottom end thereof never leaves the I-shaped guide rails 51, ensuring that the slide 52 can stably enter and exit the cylinder 3. A cross groove 54 is provided in the middle of the slide 52. A cross block 55 is slidably mounted inside the cross groove 54. A carrier plate 56 is rotatably mounted in the center of the cross block 55. An electric push rod 57 is fixedly mounted on the outer side of the drying cylinder 3. The telescopic end of the electric push rod 57 extends to the inside of the drying cylinder 3 and is fixedly connected to the slide 52.

[0064] The feeding steering mechanism 5 also includes a seat frame 58 slidably mounted on the inner side of the drying cylinder 3 and a servo motor 1 fixedly mounted on the outer side of the drying cylinder 3, wherein the movable mounting method between the drying cylinder 3 and the seat frame 58 is specifically as follows: "a limiting block is arranged at a position near the outlet of the inner side of the drying cylinder 3, and a limiting groove is provided on the bottom end surface of the seat frame 58, and the limiting block is movably inserted into the limiting groove", a screw rod 510 is rotatably mounted on the middle part of the seat frame 58 along the moving direction of the cross block 2 55, a transverse shaft 59 extending to the inside of the drying cylinder 3 is fixedly connected to the output shaft end of the servo motor 1, a propulsion block 513 slidably mounted on the inside of the seat frame 58 is threadedly sleeved on the outer side of the screw rod 510, and a rotating shaft 514 fixedly connected to the carrier plate 56 is rotatably mounted on the top of the propulsion block 513;

[0065] A tooth plate 516 is fixedly installed on the inner side of the drying cylinder 3, and a gear 2 515 meshing with the tooth plate 516 is fixedly sleeved on the outer side of the rotating shaft 514. A cross hole 512 is opened at the end of the screw 510 facing the horizontal axis 59, and a cross bar 511 is fixedly connected to the end of the horizontal axis 59, and the cross bar 511 is movably inserted into the cross hole 512. In the process of the slide 52 entering and exiting the drying cylinder 3, the cross bar 511 and the cross hole 512 always maintain a movably inserted state, and after the seat frame 58 is buckled and locked with the cover plate 48 and the drying cylinder 3, the cover plate 48 and the horizontal axis 59 can just limit the seat frame 58, which can ensure that the slide 52 can stably enter and exit the drying cylinder 3 while driving the cross block 2 55 to move stably in a straight line along the direction of the horizontal axis 59.

[0066] It should be noted that each time the slide 52 is pushed out of the drying cylinder 3, the cross block 55 is located at one end of the cross groove 54 away from the electric push rod 57. In the process of pushing the slide 52 in and out of the drying cylinder 3, the electric push rod 57 directly pushes the slide 52 to move along the I-shaped guide rail 51, and at the same time, drives the seat frame 58 to move synchronously along the cross bar 511. In this process, when the gear 515 does not leave the area where the tooth plate 516 is located, the carrier plate 56 will rotate with the movement of the slide 52, otherwise, the carrier plate 56 will not rotate.

[0067] When the coils carrying the finished varnishing and paint draining are completely retracted into the drying cylinder 3 with the slide 52 and the cover plate 48 is covered, the heating tube 10 inside the drying cylinder 3 is started to work. At the same time, the servo motor 1 is controlled to drive the horizontal shaft 59 to rotate, and the rotating horizontal shaft 59 is used to drive the screw 510 to rotate. The propulsion block 513 will reciprocate horizontally and linearly along the seat frame 58 with the rotation of the screw 510. During this process, when the gear 2 515 on the outer side of the rotating shaft 514 on the propulsion block 513 passes through the area where the tooth plate 516 is located, the gear 2 515 will rotate under the action of the tooth plate 516, thereby driving the bearing plate 56 to rotate. Since the propulsion block 513 reciprocates horizontally and linearly along the seat frame 58 under the action of the servo motor 1, the bearing plate 56 will rotate in the positive and negative directions with the reciprocating motion of the propulsion block 513, so that the coils after varnishing are evenly heated and dried, and the bearing plate 56 will also drive the nearby air flow in the process of supporting the target coil and rotating, thereby further improving the drying efficiency.

[0068] Specifically, Figure 2 and Fig.14 As shown, the material level switching mechanism 9 includes a bracket 91 fixed on the top of the base 1, a servo motor three is fixedly installed on the bottom of the bracket 91, a pendulum seat 92 is attached to the top of the bracket 91, and the output shaft of the servo motor three movably passes through one end of the bracket 91 and is fixedly connected to the pendulum seat 92, and two sink grooves 93 are provided on the top of the pendulum seat 92.

[0069] It should be noted that in the process of swapping the finished coil that has completed paint dipping and drying with the target coil to be dipped and dried, when the pick-and-place component 74 clamps the finished coil and switches to the position corresponding to the empty sink 93 on the swing seat 92, the fastening state of the finished coil is removed, allowing the bottom end of the coil to fall into the sink 93, and then the swing seat 92 is driven by servo motor three to rotate 180° to complete the swap. At this time, another coil to be processed enters the material picking station to wait for material picking, and the finished coil will be switched to the side away from the material picking station, waiting for the staff to replace the finished coil with the subsequent target coil to be processed.

[0070] Specifically, Figure 1-2 and Fig.12 As shown, the station rotating mechanism 7 includes a servo motor 2 fixedly mounted on the bottom of the base 1, the output shaft end of the servo motor 2 is fixedly connected to a main shaft 71 that movably penetrates the base 1, a disc 72 is fixedly mounted on the top of the main shaft 71, a plurality of electric push rods 3 73 evenly distributed in an annular shape are fixedly mounted on the top of the disc 72, and a pick-and-place assembly 74 is provided at the bottom of the disc 72 corresponding to each electric push rod 3 73;

[0071] The pick-and-place assembly 74 includes a cylinder 741 fixedly connected to the telescopic end of the corresponding electric push rod 3 73, a cross slot 3 742 is opened in the middle of the cylinder 741, a cross 743 is slidably connected inside the cross slot 3 742, and an electric push rod 4 744 is fixedly installed between the inner bottom of the cross slot 3 742 and the cross 743;

[0072] A U-shaped seat 745 is fixedly provided at the bottom end of the outer side of the cylinder 741, and an L-shaped frame 746 is rotatably installed on the inner side of the U-shaped seat 745 through a round rod, and a ball 747 is fixedly connected to the top of the L-shaped frame 746, wherein each end of the cross 743 is set to a trapezoidal structure, which can make the cross 743 squeeze the ball 747 at the corresponding position during the downward process, so that the L-shaped frame 746 can be deflected and opened, and the fastening state of the target coil is released. The bottom of the U-shaped seat 745 is fixedly connected to an arc rod 748 that movably passes through the corresponding L-shaped frame 746, and an arc spring 749 that is movably sleeved on the outer side of the arc rod 748 is fixedly connected to the U-shaped seat 745 and the L-shaped frame 746, and the arc spring 749 can be used to prevent the L-shaped frame 746 that fastens the target coil from automatically dislocating.

[0073] It should be noted that in the process of using the pick-and-place assembly 74 to clamp the target coil and rotate and transport it between the material changing station, the paint dipping station, the paint pouring station and the loading and unloading station, the main shaft 71 is driven by servo motor 2 to rotate 90° each time, thereby driving the disc 72 to rotate a quarter of a turn to complete the switch to the next station.

[0074] In the process of picking and placing the target coil by using the pick-and-place assembly 74, when the target coil at the designated station needs to be clamped, the electric push rod 4 744 is used to pull the initial state (such as Fig. 9 The cross 743 of the cross 743 moves downward, and the inclined surface of the end of the cross 743 is used to squeeze the ball 747, so that the ball 747 moves toward the direction of the cylinder 741, and drives the L-shaped frame 746 to deflect with the round rod connected to the U-shaped seat 745 as the central axis, and stretches the arc spring 749, so that the buckling part at the bottom of the L-shaped frame 746 is expanded, and then the buckling end on the cylinder 741 is pushed downward to the target coil (as shown in FIG. 1 ) by the electric push rod 3 73. Fig.15 The cross 743 is pushed to reset by the electric push rod 744, and accordingly, the deflected L-shaped frame 746 is reset under the restoring force of the arc spring 749 to clamp the upper end of the target coil;

[0075] Similarly, when the target coil of a designated workstation needs to be released, refer to the above process.

[0076] Specifically, Figure 2 and Fig.13As shown, the painting component 8 includes a main gear 83 fixedly sleeved on the outside of the main shaft 71 and a paint bucket 81 fixed on the top of the base 1, and a reflux trough frame 82 is fixedly connected to the outside of the paint bucket 81, wherein the inner bottom end surface of the reflux trough frame 82 is set as an inclined surface inclined downward in the direction of the paint bucket 81, so that the paint that has leaked out to the inside of the reflux trough frame 82 can be drained into the paint bucket 81 for use, and a paddle 85 is installed on the bottom of the inner side of the paint bucket 81 through a vertical axis rotation, and the bottom end of the vertical axis connecting the paddle 85 extends to the outer side of the bottom of the base 1. A sub-gear 84 meshing with the main gear 83 is fixedly sleeved, wherein the wheel diameter of the main gear 83 is larger than the wheel diameter of the sub-gear 84, and the specific wheel diameter ratio can be set according to the stirring effect of the paint in the paint bucket 81 to ensure that the sub-gear 84 can rotate multiple circles for every quarter turn of the main gear 83.

[0077] It should be noted that in the process of immersing the target coil (to be processed) in paint, when the pick-and-place assembly 74 on the station rotating mechanism 7 is used to clamp the target coil at the material picking station out of the sink 93, and the servo motor 2 drives the main shaft 71 to drive the clamped target coil to rotate above the paint bucket 81, the main gear 83 that rotates synchronously with the main shaft 71 is used to drive the sub-gear 84 to rotate, thereby driving the paddle 85 to stir the paint inside the paint bucket 81. On the one hand, it can avoid the generation of sediment in the static paint, and on the other hand, it can keep the paint inside the paint bucket 81 in a flowing state, thereby improving the paint immersion effect of the target coil in the paint bucket 81.

[0078] Specifically, Figure 3 and Figure 6-9 As shown, the jig 6 includes a collecting groove 61 opened on the top of the carrier plate 56, a plurality of protrusions 62 evenly distributed in an annular shape are fixedly provided inside the collecting groove 61, and a plurality of positioning components 63 evenly distributed in an annular shape are provided on the top of the carrier plate 56, wherein the highest point of the protrusion 62 is flush with the lowest point of the positioning component, and the sinking depth of the drying coil inside the collecting groove 61 can be limited, so that the dripping paint can flow to the bottom of the collecting groove 61 for collection;

[0079] The positioning assembly 63 includes a sliding groove 631 extending through the outer side of the carrier plate 56, and an upper clamping strip 632 and a lower clamping strip 633 are respectively slidably connected to the top and bottom of the inner cavity of the sliding groove 631, and a second tooth block 637 is fixedly provided on the opposite sides of the upper clamping strip 632 and the lower clamping strip 633. A third gear 636 is rotatably installed in the middle of the inner cavity of the sliding groove 631 through a round rod, and the third gear 636 is meshed between the second tooth blocks 637 on the upper clamping strip 632 and the lower clamping strip 633;

[0080] A retaining groove 634 is provided at one end of the upper clamping strip 632 and the lower clamping strip 633 away from the collecting groove 61, a retaining strip 635 corresponding to the retaining groove 634 is fixedly provided at the bottom of the inner side of the sliding groove 631, a guide rod 638 corresponding to the lower clamping strip 633 is fixedly provided on the outer side of the retaining strip 635, an insertion hole is provided on the outer side of the lower clamping strip 633, the end of the guide rod 638 is movably inserted into the inside of the insertion hole, and a spring 639 for fixedly connecting the retaining strip 635 and the lower clamping strip 633 is movably sleeved on the outer side of the guide rod 638, and the spring 639 can be used to limit the length of the lower clamping strip 633 extending out of the sliding groove 631;

[0081] A vertical rod 6310 is movably provided through one end of the upper clamping strip 632 close to the collecting slot 61, and a blocking piece 6311 and a triangular bevel block 6312 are fixedly connected to the top and bottom of the vertical rod 6310 respectively, and a spring 2 6313 fixedly connected to the blocking piece 6311 and the upper clamping strip 632 is movably sleeved on the outer side of the vertical rod 6310.

[0082] It should be noted that when the spring 1 639 and the spring 2 6313 are both in the natural state (ie, the initial state), the upper clamping strip 632 is just in the state as shown in FIG. Fig. 9 The sliding groove 631 is shown in the figure, and in the initial state, one end of the lower clamping strip 633 extending out of the sliding groove 631 is set as an inclined surface. At the same time, the elastic coefficient of the spring 2 6313 is set to be greater than the elastic coefficient of the spring 1 639 to ensure that after the lower clamping strip 633 is compressed into the sliding groove 631, the target coil will not easily shake up and down.

[0083] The target coil is clamped by the pick-and-place assembly 74 on the workstation rotary mechanism 7, and then switched to the top of the carrier plate 56. Then, the electric push rod 3 73 is used to push the cylinder 741 to move downward as a whole, so that the bottom end of the target coil falls into the collecting groove 61 on the top of the carrier plate 56, and the lower clamping strip 633 is extended to the inclined surface end inside the collecting groove 61 to support it. In this state, the upper clamping strip 632 is completely inside the sliding groove 631, but the upper inclined surface of the triangular inclined block 6312 on the upper clamping strip 632 contacts the upper edge of the bottom end of the core frame on the target coil. Then, the electric push rod 3 73 continues to push the cylinder 741 downward. The target coil moves upward under the obstruction of the lower clamping strip 633 until it is pressed by the bottom end surface of the cylinder 741, and then is pushed by the cylinder 741 to continue to move downward until it contacts the top of the protruding column 62.

[0084] During this process, the target coil which continues to move downward passively will squeeze the inclined surface on the lower clamping strip 633, causing the lower clamping strip 633 to shrink into the sliding groove 631 and compress the spring 1 639. In the process of the lower clamping strip 633 shrinking into the sliding groove 631, the gear 3 636 will be driven to rotate, thereby driving one end of the triangular inclined block 6312 installed on the upper clamping strip 632 to extend out of the sliding groove 631. At the same time, one end of the triangular inclined block 6312 installed on the upper clamping strip 632 will extend out of the sliding groove 631. The core frame of the target coil will squeeze the triangular inclined block 6312 to move upward and stretch the spring 2 6313. The restoring force of the spring 2 6313 will make the inclined surface of the triangular inclined block 6312 tightly press against the upper edge of the bottom end of the core frame on the target coil, so as to limit the peripheral side surface of the bottom end of the core frame of the target coil and buckle the upper end surface of the bottom end of the core frame of the target coil.

[0085] On the contrary, in the process of clamping the upper end of the target coil and pulling it upward using the pick-and-place assembly 74, the triangular bevel block 6312 is squeezed upward by the bottom end of the core frame on the target coil, and the lower clamping strip 633 is gradually pushed out under the restoring force of spring 1 639, and at the same time, the upper clamping strip 632 is driven to shrink into the sliding groove 631, and returns to the initial state to wait for the next round of clamping the target coil.

[0086] In the above technical solution, the electric push rod 1 473, the electric push rod 2 57, the electric push rod 3 73 and the electric push rod 4 744 mentioned above all use the electric push rod of the commercial model HB-DJ801; the drive motor 1 and the drive motor 2 mentioned above all use the servo motor of the commercial model JSDL2-10A1; the servo motor 1, the servo motor 2 and the servo motor 3 mentioned above all use the servo motor of the commercial model JSMA-PUC02D;

[0087] Furthermore, all actions occurring in the above technical solution are centrally controlled by a PLC controller, thereby ensuring that each action is precise and in place.

[0088] A method for varnish dipping and drying of transformer coils, specifically comprising the following steps:

[0089] S1. Prepare to start: open the cover plate 48, and use the electric push rod 57 to push the slide 52 out of the drying cylinder 3 along the I-shaped guide rail 51, so that the carrier plate 56 equipped with the tooling fixture 6 is located directly below the loading station. At the same time, the coils to be dipped in paint and dried are placed inside the sink 93 on the swing seat 92, and one of them is located directly below the material removal station for standby use;

[0090] S2, dipping and draining: the coil to be dipped and dried at the material taking station is clamped by the pick-and-place assembly 74 on the station rotary mechanism 7 to be separated from the sink 93, and the servo motor 2 drives the main shaft 71 to drive the clamped coil to rotate above the paint bucket 81, so that the electric push rod 3 73 pushes the clamped coil to be completely immersed in the paint, and after the dipping is completed, the coil is completely separated from the paint bucket 81, and the servo motor 2 drives the main shaft 71 to rotate so that the coil that has completed the dipping is switched to the draining station for draining;

[0091] S3, clamping the coil to be dried: using the servo motor 2 to drive the main shaft 71 to rotate so that the coil that has been painted is switched to the loading station, and the electric push rod 3 73 pushes the coil that has been painted to sink to the top of the carrier plate 56, and the tooling fixture 6 on the carrier plate 56 is used to clamp and limit the coil to be dried;

[0092] S4, sealing: After the slide 52 carrying the coil to be dried is pulled along the I-shaped guide rail 51 to the inside of the drying cylinder 3 by the electric push rod 2 57, the drying cylinder 3 is sealed by the cover closing mechanism 4;

[0093] S5, rotary drying: after the cover plate 48 and the drying cylinder 3 are closed, the servo motor 1 drives the horizontal shaft 59 to rotate, so that the screw 510 is driven to rotate, and the push block 513 is made to reciprocate along the screw 510. The meshing setting between the gear 2 515 and the tooth plate 516 on the outer side of the rotating shaft 514 is used to rotate the carrier plate 56 mounted on the cross block 2 55 and carrying the coil to be dried, so that the coil is evenly heated;

[0094] S6, unloading and changing materials: after the coil is dried, the electric push rod 2 57 is used to push the slide 52 out of the drying cylinder 3 along the I-shaped guide rail 51, and the corresponding pick-and-place assembly 74 on the station rotary mechanism 7 is used to clamp the coil and lift it upward, so that the coil is separated from the tooling fixture 6 and switched to the material taking position for unloading, and the servo motor 3 drives the swing seat 92 to rotate, completing the switching between the finished product position and the position to be processed.

[0095] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A varnish dipping and drying device for transformer coils, comprising a base (1), characterized in that: The top ends of the base (1) are respectively provided with a drying section and a paint dipping section, the drying section comprises two brackets (2) fixed on the top of the base (1), a drying cylinder (3) is fixedly installed between the two brackets (2), and a heating tube (10) is installed inside the drying cylinder (3); The drying cylinder (3) is provided with a jig (6) for clamping the paint-impregnated coil to be dried and a feeding and steering mechanism (5) for pushing the jig (6) in and out of the drying cylinder (3) and driving the jig (6) to continuously rotate, and a cover closing mechanism (4) is provided at one end of the drying cylinder (3) close to the paint-impregnating section; The paint dipping section is composed of a station rotation mechanism (7) for driving the coil to rotate and transport between the material changing station, the paint dipping station, the paint pouring station and the material loading and unloading station, and a painting component (8) for stirring the paint, and the paint dipping section also includes a material level switching mechanism (9) arranged on the top of the base (1) for automatically switching the position of the finished coil and the coil to be added.

2. The varnish dipping and drying device for transformer coils according to claim 1, characterized in that: The lid closing mechanism (4) comprises a seat block (41) fixed on the outside of the bracket (2) and a driving motor 1 fixed on the top of the corresponding bracket (2); a driving motor 2 is fixedly mounted on one side of the seat block (41); a gear 1 (42) is fixedly connected to the end of the output shaft of the driving motor 2; a swing arm (45) is fixedly connected to the end of the output shaft of the driving motor 1; a connecting rod (46) is provided at the bottom of the swing arm (45); and a push-pull assembly (47) is provided between the connecting rod (46) and the swing arm (45); The inner side of the drying cylinder (3) is provided with an annular groove (43), the end of the drying cylinder (3) is provided with a tooth groove (44) connected with the annular groove (43), the end of the connecting rod (46) away from the swing arm (45) is rotatably mounted with a cover plate (48) through a bearing, the outer edge of the cover plate (48) is provided with a tooth block (410) matched with the tooth groove (44), and a rack (49) is fixedly provided on the outer side of the cover plate (48) at a position corresponding to the gear (42); The push-pull assembly (47) comprises a cross slot (471) provided at the bottom of the swing arm (45) and an electric push rod (473) fixedly mounted at the end of the swing arm (45); a cross block (472) fixedly connected to the connecting rod (46) is slidably mounted inside the cross slot (471); and a telescopic end of the electric push rod (473) extends into the cross slot (471) and is fixedly connected to the cross block (472).

3. The varnish dipping and drying device for transformer coils according to claim 1, characterized in that: The feeding and steering mechanism (5) comprises two I-shaped guide rails (51) fixed on the inner side of the drying cylinder (3) and a slide table (52) located on the top of the I-shaped guide rails (51); a slide seat (53) slidably mounted on the I-shaped guide rails (51) is fixedly connected to the bottom of the slide table (52); a cross groove (54) is provided in the middle of the slide table (52); a cross block (55) is slidably mounted inside the cross groove (54); a carrier plate (56) is rotatably mounted in the center of the cross block (55); an electric push rod (57) is fixedly mounted on the outer side of the drying cylinder (3); a telescopic end of the electric push rod (57) extends to the inside of the drying cylinder (3) and is fixedly connected to the slide table (52); The feeding and steering mechanism (5) further comprises a seat frame (58) slidably mounted on the inner side of the drying cylinder (3) and a servo motor (1) fixedly mounted on the outer side of the drying cylinder (3); a screw rod (510) is rotatably mounted on the middle part of the seat frame (58) along the moving direction of the cross block (55); a transverse axis (59) extending into the interior of the drying cylinder (3) is fixedly connected to the end of the output shaft of the servo motor (1); a propulsion block (513) slidably mounted on the interior of the seat frame (58) is threadedly sleeved on the outer side of the screw rod (510); a rotating shaft (514) fixedly connected to the carrier plate (56) is rotatably mounted on the top of the propulsion block (513); A toothed plate (516) is fixedly mounted on the inner side of the drying cylinder (3); a second gear (515) meshing with the toothed plate (516) is fixedly sleeved on the outer side of the rotating shaft (514); a cross hole (512) is formed at one end of the screw rod (510) facing the transverse axis (59); a cross bar (511) is fixedly connected to the end of the transverse axis (59), and the cross bar (511) is movably inserted into the cross hole (512).

4. The varnish dipping and drying device for transformer coils according to claim 1, characterized in that: The tooling fixture (6) comprises a collecting groove (61) disposed on the top of a carrying plate (56), a plurality of protruding columns (62) evenly distributed in an annular shape are fixedly disposed on the inner side of the collecting groove (61), and a plurality of positioning components (63) evenly distributed in an annular shape are disposed on the top of the carrying plate (56).

5. The varnish dipping and drying device for transformer coils according to claim 4, characterized in that: The positioning assembly (63) includes a sliding groove (631) extending through the outer side of the carrier plate (56), the top and bottom of the inner cavity of the sliding groove (631) are respectively slidably connected with an upper clamping strip (632) and a lower clamping strip (633), and tooth blocks 2 (637) are fixedly provided on opposite sides of the upper clamping strip (632) and the lower clamping strip (633), and a gear 3 (636) is rotatably installed in the middle of the inner cavity of the sliding groove (631) through a round rod, and the gear 3 (636) is meshed between the tooth blocks 2 (637) on the upper clamping strip (632) and the lower clamping strip (633); The upper clamping strip (632) and the lower clamping strip (633) are both provided with a retaining groove (634) at one end away from the collecting groove (61); a retaining strip (635) corresponding to the retaining groove (634) is fixedly provided at the bottom of the inner side of the sliding groove (631); a guide rod (638) corresponding to the lower clamping strip (633) is fixedly provided at the outer side of the retaining strip (635); an insertion hole is provided at the outer side of the lower clamping strip (633); the end of the guide rod (638) is movably inserted into the insertion hole; and a spring (639) for fixedly connecting the retaining strip (635) and the lower clamping strip (633) is movably sleeved at the outer side of the guide rod (638); A vertical rod (6310) is movably provided through one end of the upper clamping strip (632) close to the collecting trough (61); a baffle (6311) and a triangular inclined block (6312) are respectively fixedly connected to the top and bottom of the vertical rod (6310); and a second spring (6313) fixedly connected to the baffle (6311) and the upper clamping strip (632) is movably sleeved on the outer side of the vertical rod (6310).

6. The varnish dipping and drying device for transformer coils according to claim 1, characterized in that: The workstation rotating mechanism (7) comprises a servo motor 2 fixedly mounted on the bottom of the base (1); the output shaft end of the servo motor 2 is fixedly connected to a main shaft (71) that movably penetrates the base (1); a disk (72) is fixedly mounted on the top of the main shaft (71); a plurality of electric push rods 3 (73) evenly distributed in an annular shape are fixedly mounted on the top of the disk (72); and a pick-and-place assembly (74) is provided at the bottom of the disk (72) at a position corresponding to each electric push rod 3 (73).

7. The varnish dipping and drying device for transformer coils according to claim 6, characterized in that: The pick-and-place assembly (74) comprises a cylinder (741) fixedly connected to the telescopic end of the corresponding electric push rod (73); a cross slot (742) is provided in the middle of the cylinder (741); a cross (743) is slidably connected inside the cross slot (742); and an electric push rod (744) is fixedly installed between the inner bottom of the cross slot (742) and the cross (743); A U-shaped seat (745) is fixedly provided at the bottom end of the outer side of the cylinder (741); an L-shaped frame (746) is rotatably installed on the inner side of the U-shaped seat (745) via a round rod; a round ball (747) is fixedly connected to the top of the L-shaped frame (746); the bottom of the U-shaped seat (745) is fixedly connected to an arc rod (748) that movably penetrates the corresponding L-shaped frame (746); an arc spring (749) that is movably sleeved on the outer side of the arc rod (748) and that is fixedly connected to the U-shaped seat (745) and the L-shaped frame (746).

8. The varnish dipping and drying device for transformer coils according to claim 6, characterized in that: The painting assembly (8) comprises a main gear (83) fixedly sleeved on the outside of the main shaft (71) and a paint bucket (81) fixed on the top of the base (1); a reflux trough frame (82) is fixedly connected to the outside of the paint bucket (81); a paddle (85) is rotatably mounted on the bottom of the inside of the paint bucket (81) via a vertical axis; and a sub-gear (84) meshing with the main gear (83) is provided on the outside fixed sleeve extending from the bottom end of the vertical axis connected to the paddle (85) to the bottom of the base (1).

9. The varnish dipping and drying device for transformer coils according to claim 1, characterized in that: The material level switching mechanism (9) comprises a bracket (91) fixed on the top of the base (1), a servo motor 3 is fixedly mounted on the bottom of the bracket (91), a pendulum seat (92) is attached to the top of the bracket (91), and an output shaft of the servo motor 3 movably passes through one end of the bracket (91) and is fixedly connected to the pendulum seat (92), and two sink grooves (93) are provided on the top of the pendulum seat (92).

10. A method for varnish dipping and drying a transformer coil, comprising: using the varnish dipping and drying device for transformer coils as claimed in any one of claims 1 to 9 to varnish dipping and drying the transformer coils, characterized in that: The specific steps include the following: S1, preparation for starting: open the cover plate (48), and use the second electric push rod (57) to push the slide (52) out of the drying cylinder (3) along the I-shaped guide rail (51), so that the carrier plate (56) equipped with the tooling fixture (6) is located directly below the loading station. At the same time, the coil to be dipped in paint and dried is placed inside the sink (93) on the swing seat (92), and one of them is located directly below the material removal station for standby use; S2, dipping and drying: using the pick-and-place assembly (74) on the station rotary mechanism (7) to clamp the coil to be dipped and dried at the material taking station and remove it from the sink (93), and using the servo motor 2 to drive the main shaft (71) to drive the clamped coil to rotate above the paint bucket (81), so that the electric push rod 3 (73) pushes the clamped coil to be completely immersed in the paint, and after the dipping is completed, the coil is completely separated from the paint bucket (81), and the servo motor 2 is used to drive the main shaft (71) to rotate so that the coil that has completed the dipping is switched to the paint drying station for drying; S3, clamping the coil to be dried: using the servo motor 2 to drive the main shaft (71) to rotate so that the coil that has been painted is switched to the loading station, and the electric push rod 3 (73) pushes the coil that has been painted to sink to the top of the carrier plate (56), and the tooling fixture (6) on the carrier plate (56) is used to clamp and limit the coil to be dried; S4, sealing: using the second electric push rod (57) to pull the slide (52) carrying the coil to be dried along the I-shaped guide rail (51) to the inside of the drying cylinder (3), and then sealing the drying cylinder (3) by the cover closing mechanism (4); S5, rotary drying: after the cover plate (48) and the drying cylinder (3) are closed, the servo motor 1 is used to drive the horizontal shaft (59) to rotate, so that the screw (510) is driven to rotate, and the push block (513) is made to reciprocate along the screw (510). The meshing arrangement between the gear 2 (515) and the tooth plate (516) on the outer side of the rotating shaft (514) is used to rotate the carrier plate (56) mounted on the cross block 2 (55) and carrying the coil to be dried, so that the coil is evenly heated. S6, unloading and changing materials: After the coil is dried, the slide table (52) is pushed out of the drying cylinder (3) along the I-shaped guide rail (51) by the electric push rod 2 (57), and the corresponding pick-and-place assembly (74) on the station rotary mechanism (7) is used to clamp the coil and lift it upward, so that the coil is separated from the tooling fixture (6) and switched to the material taking position for unloading. The servo motor 3 drives the swing seat (92) to rotate, completing the switching between the finished product position and the position to be processed.

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