Dry-type transformer paint dipping device

Abstract

The invention belongs to the technical field of transformer manufacturing, and particularly relates to a dry-type transformer paint dipping device which comprises a paint dipping box and a box cover, and further comprises a U-shaped fixing frame fixedly arranged at the top of the paint dipping box, and a lower placing mechanism is arranged at the top of the U-shaped fixing frame and matched with the box cover to seal an opening in the top of the paint dipping box; and a lowering speed detection mechanism. The lowering speed of the dry-type transformer can be accurately controlled, paint liquid fluctuation and bubbles formed by air entrainment caused by too fast lowering or paint liquid adhesion imbalance caused by too slow lowering are avoided, follow-up paint make-up is not needed, meanwhile, the lowering speed can be detected in real time, automatic adjustment is conducted when abnormity is found so that the constant speed can be maintained, and the paint dipping defect caused by unstable speed is reduced; besides, paint liquid convection, layering breaking and paint liquid uniformity can be realized through reverse rotation stirring, stirring strength can be adjusted in a layered manner subsequently, a differential flow field is formed, sufficient permeation of the paint liquid is guaranteed, bubble residues and paint layer unevenness are reduced, and paint dipping quality is improved.

Description

Technical Field

[0001] This invention belongs to the field of transformer manufacturing technology, and in particular relates to a dry-type transformer impregnation device. Background Technology

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are the primary coil, the secondary coil, and the iron core. As the most important component of a transformer, the manufacturing process of the transformer coil requires very high standards. In addition, in order to ensure that the coil has excellent insulation, it must be impregnated with varnish after manufacturing, such as the dry-type transformer impregnation device disclosed in announcement number CN222421621U.

[0003] Currently, most mainstream impregnation equipment relies on manual hoisting or simple mechanical conveying during the process of placing dry-type transformer workpieces into the impregnation device. This makes it impossible to achieve uniform and stable placement. If the placement speed is too fast, the varnish will fluctuate violently due to the rapid impact of the workpiece, causing local high pressure to form at the moment of contact between the bottom of the dry-type transformer and the varnish. This forces the varnish to accumulate rapidly in the bottom winding gaps. During subsequent drying, cracking is likely to occur due to excessively thick varnish layers and uneven solvent evaporation. Moreover, high-speed placement will entrain a large amount of air into the varnish. The resulting air bubbles are easily trapped in the deep gaps of the windings and are difficult to expel, eventually forming voids in the insulation layer, creating hidden dangers of partial discharge and insulation breakdown. If the placement speed is too slow or uneven, the amount of varnish adhering to the surface of the dry-type transformer will be unbalanced, with more at the bottom and less at the top. This requires additional varnishing later, increasing process costs and the risk of rework.

[0004] To address this, a dry-type transformer impregnation device is proposed. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a dry-type transformer impregnation device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a dry-type transformer impregnation device, comprising an impregnation tank and a tank cover, and further comprising:

[0007] A U-shaped fixing frame is fixedly installed on the top of the impregnation tank. The top of the U-shaped fixing frame is provided with a lowering mechanism, which cooperates with the tank cover and seals the top opening of the impregnation tank.

[0008] A lowering speed detection mechanism is set on the top of the U-shaped fixed frame, and the moving end of the lowering speed detection mechanism is fixedly connected to the upper surface of the box cover.

[0009] Two sets of agitation mechanisms are respectively arranged on both sides of the inside of the paint dipping tank, and the agitation mechanisms are used to stir the paint liquid inside the paint dipping tank. The two sets of agitation mechanisms agitate the paint liquid inside the paint dipping tank in opposite directions.

[0010] Two drive mechanisms are located on both sides of the bottom of the impregnation tank, and the two drive mechanisms are respectively connected to the two sets of disturbance mechanisms;

[0011] The PLC controller is fixedly installed on the side wall of the impregnation tank. The lowering mechanism, lowering speed detection mechanism, disturbance mechanism and drive mechanism are all electrically connected to the PLC controller.

[0012] Preferably, the lowering mechanism includes a cylinder fixedly mounted on the top of the U-shaped fixing frame, the moving end of the cylinder being fixedly connected to the center of the upper surface of the box cover, and four evenly distributed lifting rods being fixedly mounted on the lower surface of the box cover, with the lower ends of the four lifting rods being fixedly mounted on the same lifting cage.

[0013] Preferably, the lowering speed detection mechanism includes a strip-shaped housing that is vertically fixed at the top of the U-shaped fixing frame. A resistance rod is vertically fixed inside the strip-shaped housing. A conductive block is slidably provided on the wall of the resistance rod. Two insulating movable rods are symmetrically fixed at the bottom of the conductive block. The lower ends of the two insulating movable rods extend to the outside of the strip-shaped housing and are fixedly connected to the upper surface of the box cover.

[0014] Preferably, the disturbance mechanism includes a plurality of agitators rotatably disposed at the bottom of both sides of the impregnation tank, and a sealed bearing is fixedly provided at the bottom of the impregnation tank and at a position corresponding to the position of the plurality of agitators, and the lower ends of the plurality of agitators are rotatably connected to the bottom of the impregnation tank through the sealed bearing.

[0015] Preferably, the distance between the two agitators is greater than the width of the cage, and the cage can be placed between the two agitators.

[0016] Preferably, the driving mechanism includes a fixed cover fixedly disposed at the bottom of the impregnation tank, a motor fixedly disposed on one side of the fixed cover, a drive shaft extending into the interior of the fixed cover fixedly disposed at the output end of the motor, a plurality of evenly distributed first bevel gears fixedly disposed on the shaft wall of the drive shaft, and the lower ends of the plurality of agitators extending into the interior of the fixed cover and fixedly disposed on second bevel gears, wherein the first bevel gears and the second bevel gears are meshed.

[0017] Preferably, the agitator includes a first agitation unit, a second agitation unit, and a third agitation unit arranged from bottom to top. Differentials are installed between the first agitation unit and the second agitation unit, as well as between the second agitation unit and the third agitation unit, and the outer shell of the differentials is fixedly connected to the inner wall of the impregnation tank.

[0018] Preferably, a sealing plate is fixedly provided on the lower surface of the box cover, and the four sides of the sealing plate are in sliding sealing fit with the four sides of the top opening of the impregnation box.

[0019] Compared with existing technologies, the advantages of this invention are as follows:

[0020] 1. The lowering mechanism precisely controls the cylinder extension speed, preventing excessively fast lowering from causing violent fluctuations in the paint and entraining air into the winding gap (reducing the risk of air bubbles in the insulation layer), while avoiding excessively slow lowering from causing an imbalance in paint adhesion on the workpiece surface (requiring no subsequent touch-up painting, reducing process costs and rework risks). Simultaneously, the cover moves down synchronously with the cylinder, and its lower surface sealing plate slides and seals with the top opening of the impregnation tank. Once lowered into place, the impregnation tank can be sealed directly without additional sealing operations. This simplifies the process and maintains a stable paint environment during subsequent impregnation, preventing external dust and moisture from affecting paint performance and further ensuring impregnation quality.

[0021] 2. Through the set lowering speed detection mechanism, when the box cover is lowered, the insulating moving rod drives the conductive block to slide along the resistance rod, changing the resistance value of the resistance rod connected to the circuit. In turn, the current change reflects the lowering speed, which can capture speed abnormalities in real time and transmit the signal to the PLC controller. The controller automatically adjusts the air intake of the cylinder to correct the speed, avoiding speed deviations caused by factors such as cylinder air intake pressure fluctuations and seal wear. This ensures that the dry-type transformer enters the paint liquid at a uniform speed, reduces paint impregnation defects caused by unstable speed, and improves process reliability and consistency.

[0022] 3. Through the set disturbance mechanism, in the initial stage, the two drive motors drive the agitators to rotate in opposite directions, forming horizontal convection. This can quickly break the static layering of the paint liquid, disperse the solid fillers deposited at the bottom, and eliminate the stagnant areas of the paint liquid in the corners of the dipping tank, ensuring that the composition and viscosity of the paint liquid in the whole tank are uniform, laying a good foundation for subsequent dipping. After the workpiece is completely immersed, the differential can adjust the speed of each unit of the agitator according to the instructions of the PLC controller. By changing the transmission ratio of the first agitator unit, the second agitator unit, and the third agitator unit, a layered disturbance flow field of "low intensity at the bottom, medium intensity in the middle, and high intensity at the top" is formed. This differentiated disturbance design can not only ensure the full penetration of the paint liquid, but also reduce the problems of residual bubbles and uneven paint layer thickness, significantly improving the density and reliability of the insulation layer. Attached Figure Description

[0023] Figure 1 This is a first-view perspective perspective view of a dry-type transformer impregnation device provided by the present invention;

[0024] Figure 2 This is a second-view perspective perspective view of a dry-type transformer impregnation device provided by the present invention;

[0025] Figure 3 This is a perspective view of the impregnation tank and disturbance mechanism in a dry-type transformer impregnation device provided by the present invention;

[0026] Figure 4 This is a perspective view of the lowering speed detection mechanism in a dry-type transformer impregnation device provided by the present invention;

[0027] Figure 5 This is a perspective view of the disturbance mechanism and drive mechanism in a dry-type transformer impregnation device provided by the present invention;

[0028] Figure 6 This is a perspective view of the stirrer in a dry-type transformer impregnation device provided by the present invention.

[0029] In the diagram: 1. Impregnation tank; 2. Tank cover; 3. U-shaped fixing frame; 4. Lowering mechanism; 41. Cylinder; 42. Lifting rod; 43. Cage; 5. Lowering speed detection mechanism; 51. Strip shell; 52. Resistance rod; 53. Conductive block; 54. Insulating moving rod; 6. Disturbance mechanism; 61. Agitator; 611. First stirring unit; 612. Second stirring unit; 613. Third stirring unit; 614. Differential; 62. Sealed bearing; 7. Drive mechanism; 71. Fixing cover; 72. Motor; 73. Drive shaft; 74. First bevel gear; 75. Second bevel gear; 8. PLC controller; 9. Sealing plate. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0031] like Figures 1-6 As shown, a dry-type transformer impregnation device includes an impregnation tank 1 and a tank cover 2. A sealing plate 9 is fixedly provided on the lower surface of the tank cover 2, and the four sides of the sealing plate 9 are slidably sealed with the four sides of the top opening of the impregnation tank 1, which can seal the top opening of the impregnation tank 1 and prevent external dust and impurities from entering during the impregnation process. The device also includes:

[0032] A U-shaped fixing frame 3 is fixedly installed on the top of the impregnation tank 1. The top of the U-shaped fixing frame 3 is provided with a lowering mechanism 4, which cooperates with the tank cover 2 to seal the top opening of the impregnation tank 1. The lowering mechanism 4 includes a cylinder 41 fixedly installed on the top of the U-shaped fixing frame 3. The moving end of the cylinder 41 is fixedly connected to the center of the upper surface of the tank cover 2. Four evenly distributed hanging rods 42 are fixedly installed on the lower surface of the tank cover 2. The lower ends of the four hanging rods 42 are fixedly provided with the same hanging cage 43. The inside of the hanging cage 43 is used to place the dry-type transformer. When the cylinder 41 extends, it will drive the tank cover 2 to move down, so that the hanging rods 42 and the hanging cage 43 will descend accordingly, and finally the dry-type transformer will be smoothly sent into the paint liquid in the impregnation tank 1.

[0033] The lowering speed detection mechanism 5 is located on the top of the U-shaped fixed frame 3, and the moving end of the lowering speed detection mechanism 5 is fixedly connected to the upper surface of the box cover 2. The lowering speed detection mechanism 5 includes a strip-shaped shell 51 that is vertically fixed on the top of the U-shaped fixed frame 3. A resistance rod 52 is vertically fixed inside the strip-shaped shell 51. A conductive block 53 is slidably provided on the rod wall of the resistance rod 52. Two insulating moving rods 54 are symmetrically fixed at the bottom of the conductive block 53. The lower ends of the two insulating moving rods 54 extend to the outside of the strip-shaped shell 51 and are fixedly connected to the upper surface of the box cover 2. During the lowering of the box cover 2, the two insulating moving rods 54 are driven to move downward synchronously. As the insulating moving rods 54 move downward, the conductive block 53 slides on the rod wall of the resistance rod 52, changing the length of the resistance rod 52 connected in the circuit.

[0034] Two sets of agitation mechanisms 6 are respectively arranged on both sides of the interior of the impregnation tank 1. The agitation mechanisms 6 are used to stir the paint liquid inside the impregnation tank 1. The two sets of agitation mechanisms 6 agitate the paint liquid inside the impregnation tank 1 in opposite directions. The agitation mechanism 6 includes multiple stirrers 61 rotatably arranged at the bottom of both sides of the impregnation tank 1. Sealed bearings 62 are fixedly provided at the bottom of the impregnation tank 1 and at positions corresponding to the multiple stirrers 61. The lower ends of the multiple stirrers 61 are rotatably connected to the bottom of the impregnation tank 1 through the sealed bearings 62. The distance between the stirrers 61 on both sides is greater than the width of the cage 43. The cage 43 can be placed between the stirrers 61 on both sides to avoid collision between the cage 43 and the stirrers 61 on both sides. The stirrers 61 include a series of stirrers from bottom to top. The first stirring unit 611, the second stirring unit 612, and the third stirring unit 613 are arranged in a distributed manner. Differentials 614 are installed between the first stirring unit 611 and the second stirring unit 612, as well as between the second stirring unit 612 and the third stirring unit 613. The outer shell of the differential 614 is fixedly connected to the inner wall of the impregnation tank 1. The speed control of the differential 614 is achieved through its internal planetary gear mechanism. By increasing the transmission ratio of the first stirring unit 611 to the differential 614, its output speed is reduced. By decreasing the transmission ratio of the second stirring unit 612 to the differential 614, the speed is increased. Similarly, the transmission ratio of the third stirring unit 613 to the differential 614 can be decreased.

[0035] Two drive mechanisms 7 are located on both sides of the bottom of the impregnation tank 1, and the two drive mechanisms 7 are respectively connected to two sets of agitation mechanisms 6. The drive mechanism 7 includes a fixed cover 71 fixedly installed at the bottom of the impregnation tank 1. A motor 72 is fixedly installed on one side of the fixed cover 71. A drive shaft 73 extending into the inside of the fixed cover 71 is fixedly installed at the output end of the motor 72. Multiple evenly distributed first bevel gears 74 are fixedly installed on the shaft wall of the drive shaft 73. The lower ends of multiple agitators 61 extend into the inside of the fixed cover 71 and are fixedly installed with second bevel gears 75. The first bevel gears 74 and the second bevel gears 75 are meshed. After the motor 72 is running, its output end drives the drive shaft 73 to rotate synchronously. The multiple first bevel gears 74 on the drive shaft 73 rotate accordingly. Each first bevel gear 74 meshes with the corresponding second bevel gear 75 for transmission.

[0036] The PLC controller 8 is fixedly installed on the side wall of the impregnation tank 1. The lowering mechanism 4, the lowering speed detection mechanism 5, the disturbance mechanism 6 and the drive mechanism 7 are all electrically connected to the PLC controller 8.

[0037] The operating principle of this invention is described as follows: Before the formal start of the atmospheric pressure impregnation operation of the dry-type transformer, the workers first thoroughly clean the dry-type transformer. Compressed air with a pressure of 0.2-0.3MPa is used to slowly blow along the winding gaps, the core surface and the gaps in the dry-type transformer shell to thoroughly remove the attached dust, metal debris and other impurities. If the winding surface is covered with oil due to processing or storage, a lint-free cloth dipped in anhydrous ethanol is used to gently wipe along the winding conductors to avoid scratching the insulation paper. After wiping, the dry-type transformer is placed in a ventilated and dry place to air dry naturally to ensure that there is no ethanol residue on the surface, and to prevent the oil and paint from repelling each other and affecting the wetting and adhesion of the paint on the winding surface.

[0038] After cleaning, the dry-type transformer needs to be transferred to the special cage 43. For small dry-type transformers, 2-3 workers can help with the handling. When handling, the bottom and sides of the dry-type transformer need to be supported to avoid tilting and causing the windings to shift. For medium or large dry-type transformers, auxiliary hoisting equipment such as electric hoists are needed to ensure that the dry-type transformer is placed in the center of the cage 43.

[0039] Once ready, the operator issues a command through the PLC controller 8 to start the drive motors 72 on both sides of the bottom of the impregnation tank 1. The two motors 72 are preset to rotate in opposite directions (clockwise on the left, counter-clockwise on the right). After the motors 72 start, their output drives the drive shaft 73 to rotate synchronously. Multiple first bevel gears 74 on the drive shaft 73 rotate accordingly. Each first bevel gear 74 meshes with a corresponding second bevel gear 75, thereby driving the agitators 61 on both sides inside the impregnation tank 1 to rotate. (At this time, the multiple differentials 614 on the agitators 61 have the same transmission ratio, ensuring that the first agitator unit 61...) The second stirring unit 612 and the third stirring unit 613 rotate synchronously. Due to the opposite rotation of the motors 72 on both sides, the stirrers 61 on both sides form an opposite rotation trend. The left stirrer 61 pushes the paint liquid to the right and the right stirrer 61 pushes the paint liquid to the left, forming convection inside the paint dipping tank 1. This can break the static stratification of the paint liquid. In particular, it can evenly disperse the solid fillers (such as glass powder in heat-resistant paint) deposited at the bottom of the paint dipping tank 1, avoid local paint liquid viscosity differences, and eliminate the paint liquid stagnation area in the corner of the paint dipping tank 1. This ensures that the composition and viscosity distribution of the paint liquid in the whole tank are consistent, and provides a guarantee for the subsequent paint dipping quality.

[0040] After the paint solution reaches a uniform state through agitation, the operator sends an action command to the cylinder 41 through the PLC controller 8, setting the extension speed of the cylinder 41 to 5-10 cm / min. This speed range ensures that the cage 43 and the dry-type transformer inside move down smoothly. If the descent speed is too fast, a violent impact will occur when the bottom of the dry-type transformer comes into contact with the paint solution, causing the paint solution to splash and carrying a large amount of air into the winding gap. This air is difficult to expel under normal pressure and is prone to forming bubbles in the insulation layer. If the speed is too slow, the dry-type transformer will be in the paint solution transition area for a long time, and the amount of paint adhering to the surface of the dry-type transformer will show an unbalanced state of "more at the bottom and less at the top", requiring additional paint touch-up later. When the cylinder 41 extends, its moving end drives the cover 2 to move down, and the lifting rod 42 fixed at the bottom of the cover 2 and the cage 43 descend accordingly, finally sending the dry-type transformer smoothly into the paint solution in the immersion tank 1 until the dry-type transformer is completely submerged (the liquid level is 5-10 cm above the top of the dry-type transformer).

[0041] During the downward movement of the cover 2, the two insulating moving rods 54 fixed at its top move downward synchronously. As the insulating moving rods 54 move downward, the conductive block 53 at the upper end of the insulating moving rod 54 slides on the rod wall of the resistor rod 52. The resistor rod 52 is pre-connected to the circuit. When the conductive block 53 moves downward, the effective length of the resistor rod 52 connected to the circuit is shortened, and the resistance value decreases accordingly. According to Ohm's law, under the condition of constant circuit voltage, the decrease in resistance will lead to an increase in circuit current. A measuring circuit is connected in series between the resistor rod 52 and the conductive block 53, which can collect the current change signal in real time. After the signal is filtered to remove interference and amplified by the amplification module, it is transmitted to the PLC controller 8. The PLC controller 8 compares the real-time current change amplitude with the preset uniform downward current signal.

[0042] If the current increases too much, it indicates that the extension speed of cylinder 41 has suddenly increased (the cause may be a momentary increase in the air intake pressure of cylinder 41). At this time, PLC controller 8 immediately sends a command to the control valve of cylinder 41 to reduce the air intake and reduce the extension speed. If the current increases too little, it indicates that the extension speed of cylinder 41 has suddenly decreased (the cause may be air leakage due to wear of the cylinder 41 seal). PLC controller 8 then increases the air intake of cylinder 41 accordingly and increases the extension speed. This ensures that the dry-type transformer is put into the paint at a uniform speed, avoiding paint impregnation defects caused by speed fluctuations.

[0043] When the cover 2 is completely flush with the top of the dipping tank 1, it indicates that the dry-type transformer inside the cage 43 is completely submerged in the paint. At this point, the PLC controller 8 immediately sends a command to stop the extension of the cylinder 41. Subsequently, the PLC controller 8 sends a speed adjustment signal to the differential 614 on both sides of the agitator 61 through its built-in wireless communication module. The differential 614 also integrates a matching wireless communication module, which can receive and parse commands in real time. The speed control of the differential 614 is achieved through its internal planetary gear mechanism: the PLC sends a corresponding control signal to each differential 614 according to the preset speed gradient to adjust the meshing of the planetary gears. The state and transmission ratio are used to control the rotational speed of the first stirring unit 611, the second stirring unit 612, and the third stirring unit 613 respectively. For example, by increasing the transmission ratio of the differential 614 corresponding to the first stirring unit 611, its output speed is reduced; by decreasing the transmission ratio of the differential 614 corresponding to the second stirring unit 612, the speed is increased; and by further decreasing the transmission ratio of the differential 614 corresponding to the third stirring unit 613, the preset gradient of "the rotational speed of the first stirring unit 611 is less than the rotational speed of the second stirring unit 612, and the rotational speed of the second stirring unit 612 is less than the rotational speed of the third stirring unit 613" is finally achieved.

[0044] This layered speed-regulating design allows the varnish to form a differentiated flow field of "low-intensity disturbance at the bottom, medium-intensity disturbance in the middle, and high-intensity disturbance at the top." The low-intensity disturbance at the bottom prevents excessive flow of the varnish, which could cause trace impurities deposited at the bottom of the impregnation tank to be drawn into the bottom winding of the dry-type transformer. Simultaneously, the low-intensity disturbance allows the varnish to slowly penetrate into the gaps between the bottom windings of the dry-type transformer, preventing air from being trapped due to excessive flow velocity. The medium-intensity disturbance in the middle balances the fluidity and stability of the varnish, ensuring that the varnish evenly coats the middle windings of the dry-type transformer (this area...). The area is the main contact surface between the iron core and the winding, which is prone to varnish impregnation dead corners. It can also avoid excessive disturbance that causes the viscosity of the middle layer varnish to fluctuate, ensuring the uniform thickness of the insulation layer. High-intensity disturbance can break the "film" formed on the surface of the varnish due to contact with air (avoiding the film from hindering the varnish from penetrating into the top winding of the dry-type transformer). In addition, the rapidly flowing varnish can "encapsulate" the air brought in from the gap of the top winding to the liquid surface and discharge it, reducing the residual air bubbles. At the same time, it accelerates the uniformity of solvent evaporation and prevents the viscosity of the top varnish from increasing sharply due to excessive solvent evaporation, which would affect the penetration effect of subsequent static impregnation.

[0045] Through the above-mentioned layered perturbation impregnation process, the duration is within a certain range (10-20 minutes for small dry-type transformers, 20-40 minutes for medium-sized dry-type transformers, and 40-60 minutes for large dry-type transformers). After the impregnation is completed, the operator operates the PLC controller 8 to control the cylinder 41 to retract and remove the impregnated dry-type transformer. The removed dry-type transformer needs to be kept in an upright position and left to stand for 10-15 minutes to allow excess paint on the surface to drip back into the impregnation tank 1, reducing paint waste. Then it is transferred to the drying station to enter the subsequent staged curing and drying operation, finally forming a dense paint layer that meets the insulation performance requirements.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dry-type transformer impregnation device, comprising an impregnation tank (1) and a tank cover (2), characterized in that, Also includes: A U-shaped fixing frame (3) is fixedly installed on the top of the impregnation tank (1). The top of the U-shaped fixing frame (3) is provided with a lowering mechanism (4), and the lowering mechanism (4) cooperates with the tank cover (2) to seal the top opening of the impregnation tank (1). The lowering speed detection mechanism (5) is set on the top of the U-shaped fixing frame (3), and the moving end of the lowering speed detection mechanism (5) is fixedly connected to the upper surface of the box cover (2); Two sets of disturbance mechanisms (6) are respectively set on the inside sides of the paint dipping tank (1), and the disturbance mechanisms (6) are used to stir the paint liquid inside the paint dipping tank (1). The two sets of disturbance mechanisms (6) disturb the paint liquid inside the paint dipping tank (1) in opposite directions. Two drive mechanisms (7) are located on both sides of the bottom of the impregnation tank (1), and the two drive mechanisms (7) are respectively connected to two sets of disturbance mechanisms (6); The PLC controller (8) is fixedly installed on the side wall of the impregnation tank (1). The lowering mechanism (4), the lowering speed detection mechanism (5), the disturbance mechanism (6) and the drive mechanism (7) are all electrically connected to the PLC controller (8).

2. The dry-type transformer impregnation device according to claim 1, characterized in that, The lowering mechanism (4) includes a cylinder (41) fixedly installed on the top of the U-shaped fixing frame (3). The moving end of the cylinder (41) is fixedly connected to the center of the upper surface of the box cover (2). The lower surface of the box cover (2) is fixedly provided with four evenly distributed hanging rods (42), and the lower ends of the four hanging rods (42) are fixedly provided with the same hanging cage (43).

3. The dry-type transformer impregnation device according to claim 1, characterized in that, The lowering speed detection mechanism (5) includes a strip-shaped housing (51) vertically fixed on the top of the U-shaped fixing frame (3). A resistance rod (52) is vertically fixed inside the strip-shaped housing (51). A conductive block (53) is slidably provided on the wall of the resistance rod (52). Two insulating moving rods (54) are symmetrically fixed at the bottom of the conductive block (53). The lower ends of the two insulating moving rods (54) extend to the outside of the strip-shaped housing (51) and are fixedly connected to the upper surface of the box cover (2).

4. The dry-type transformer impregnation device according to claim 2, characterized in that, The disturbance mechanism (6) includes a plurality of agitators (61) rotatably disposed on the bottom of both sides of the impregnation tank (1). Sealed bearings (62) are fixedly provided at the bottom of the impregnation tank (1) and at positions corresponding to the positions of the plurality of agitators (61). The lower ends of the plurality of agitators (61) are rotatably connected to the bottom of the impregnation tank (1) through the sealed bearings (62).

5. The dry-type transformer impregnation device according to claim 4, characterized in that, The distance between the two agitators (61) is greater than the width of the cage (43), and the cage (43) can be placed between the two agitators (61).

6. The dry-type transformer impregnation device according to claim 4, characterized in that, The drive mechanism (7) includes a fixed cover (71) fixedly disposed at the bottom of the impregnation tank (1). A motor (72) is fixedly disposed on one side of the fixed cover (71). A drive shaft (73) extending into the interior of the fixed cover (71) is fixedly disposed at the output end of the motor (72). A plurality of evenly distributed first bevel gears (74) are fixedly disposed on the shaft wall of the drive shaft (73). The lower ends of the plurality of agitators (61) extend into the interior of the fixed cover (71) and are fixedly disposed with second bevel gears (75). The first bevel gears (74) and the second bevel gears (75) are meshed.

7. The dry-type transformer impregnation apparatus according to claim 4, characterized in that, The agitator (61) includes a first agitator (611), a second agitator (612) and a third agitator (613) arranged from bottom to top. Differentials (614) are installed between the first agitator (611) and the second agitator (612) and between the second agitator (612) and the third agitator (613), and the outer shell of the differential (614) is fixedly connected to the inner wall of the impregnation tank (1).

8. The dry-type transformer impregnation device according to claim 1, characterized in that, A sealing plate (9) is fixedly provided on the lower surface of the box cover (2), and the four sides of the sealing plate (9) are in sliding sealing cooperation with the four sides of the top opening of the immersion box (1).

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