A device for uniform impregnation of transformer winding insulation paint

Abstract

The application provides a transformer winding insulation paint uniform impregnation device, and belongs to the technical field of electrical equipment accessories, which comprises a rack, a driving part and a lifting slide rail, one end of the lifting slide rail is provided with a supporting plate, and one end of the supporting plate is provided with an impregnation assembly. The device has the beneficial effects that: through the cooperation of the corrugated supporting ring, the pressing column, the limiting pin, the limiting slot hole and the return spring, the winding clamped by the pneumatic clamping plate reciprocates up and down with a small amplitude during rotation, which promotes the insulation paint to fully contact the winding surface and penetrate into the turn-to-turn gap, is beneficial to bubble discharge, improves the uniformity of the insulation paint adhesion and the impregnation effect; and the up-and-down reciprocating movement of the sleeve drives the elastic expansion pipe to alternately stretch and compress, directional exhaust is formed through the one-way air inlet pipe, the one-way air outlet pipe, the corrugated pipe and the dispersion frame, after the winding is taken out of the paint liquid, the airflow promotes the uniform flow of the excess paint liquid and speeds up the preliminary drying of the surface, thereby improving the impregnation quality and the subsequent drying efficiency.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment accessories technology, and more specifically, to a device for uniformly impregnating transformer winding insulation varnish. Background Technology

[0002] Transformers are designed to provide efficient, safe, and environmentally friendly power conversion, suitable for various power systems and industrial applications. Through impregnation, a uniform insulation layer can be formed between the windings and other insulation parts, improving insulation strength, which is crucial for preventing faults such as breakdown and insulation breakdown.

[0003] In existing transformer winding impregnation devices, the windings are typically immersed in insulating varnish in a relatively fixed posture during operation. Due to the narrow gaps between turns, layers, and the frame of the windings, air inside the windings is not easily expelled in time. Furthermore, the flow direction of the insulating varnish is relatively unidirectional under the fixed posture, which can easily create gas stagnation areas or impregnation dead zones, resulting in insufficient penetration depth and uneven distribution of the insulating varnish, affecting the impregnation quality and insulation performance of the windings. Moreover, after impregnation, a large amount of excess varnish is easily left on the surface and bottom of the windings. Relying on natural varnish dripping is time-consuming and may cause problems such as varnish accumulation, sagging, and uneven varnish layer thickness. How to invent a transformer winding insulating varnish uniform impregnation device to solve these problems has become an urgent problem for those skilled in the art. Summary of the Invention

[0004] To overcome the above shortcomings, the present invention provides a transformer winding insulating varnish uniform impregnation device, which aims to solve the problems of existing transformer winding varnish impregnation devices, such as difficulty in venting air inside the winding, uneven penetration of insulating varnish, and difficulty in effectively handling residual varnish after impregnation.

[0005] This invention is implemented as follows: This invention provides a device for uniformly impregnating transformer winding insulating varnish, including a frame, a drive component, and a lifting slide rail. A support plate is installed at one end of the lifting slide rail, and an impregnation component is provided at one end of the support plate. The impregnation component impregnates the transformer winding by moving the lifting slide rail up and down.

[0006] Preferably, the inner side of the frame is provided with an impregnation tank and a conveyor frame, the drive unit is located above the frame, and the drive unit is connected to the lifting slide rail.

[0007] Preferably, the impregnation assembly is provided in two sets, each set of the impregnation assembly includes a mounting column and a mounting base. One end of the mounting column is fixedly connected to the mounting base, and the other end of the mounting column is detachably connected to the support plate. A motor is installed on the side wall of the mounting base, and a synchronous belt is driven to one end of the motor. A limiting plate and a sensor are respectively provided on one end of the mounting base. There are two limiting plates, and the included angle between the two limiting plates is ninety degrees.

[0008] Preferably, the impregnation assembly includes a timing pulley and a tension pulley, and there are multiple timing pulleys and tension pulleys. The multiple timing pulleys and tension pulleys are arranged alternately. The timing pulleys and tension pulleys are connected to the timing belt for transmission. One of the timing pulleys has a retaining ring on its side wall, and another timing pulley has a sensing ring on its side wall.

[0009] Preferably, the impregnation assembly further includes a clamping mechanism, the clamping mechanism including a stabilizing seat, a sleeve installed at the upper end of the stabilizing seat, a support plate fixedly connected to the end of the sleeve away from the stabilizing seat, a support ring fixedly connected to the side wall of the support plate, and a limit pin installed on the outer wall of the sleeve.

[0010] Preferably, the clamping mechanism further includes a fixed seat, with fixed bolts connected to both ends of the fixed seat. One end of the fixed bolt passes through the fixed seat and is threadedly connected to a stabilizing seat. A telescopic spring is sleeved on the outer wall of the fixed bolt. A pneumatic seat is installed at the lower end of the fixed seat. Pneumatic clamps are slidably connected to the symmetrical sides of the pneumatic seat. Anti-slip pads are provided on the side walls of the pneumatic clamps. The two ends of the telescopic spring abut against the side walls of the stabilizing seat and the fixed seat, respectively.

[0011] Preferably, the clamping mechanism further includes a rotating shaft, one end of which is fixedly connected to a synchronous pulley, the outer wall of which is rotatably connected to a mounting base, and a plurality of pressure columns symmetrically distributed about the axis on the outer side of the rotating shaft. The pressure columns are fixedly connected to the side wall of the mounting base, and one end of the pressure column is slidably connected to the side wall of the support ring.

[0012] Preferably, a pressure plate is fixedly connected to the end of the rotating shaft away from the synchronous pulley, a limit slot is formed on the outer wall of the rotating shaft, the limit slot is slidably connected to the limit pin, the rotating shaft is slidably connected to the sleeve, and a return spring is sleeved on the outer wall of the rotating shaft, with the two ends of the return spring being fixedly connected to the side walls of the sleeve and the pressure plate, respectively.

[0013] Preferably, the clamping mechanism further includes an exhaust module, which includes an elastic telescopic tube located inside the fixed base. The two ends of the elastic telescopic tube are fixedly connected to the pneumatic base and the side wall of the pressure plate, respectively. Extension tubes are installed on both symmetrical sides of the outer wall of the elastic telescopic tube. The extension tubes are connected to the fixed base. The end of the extension tube away from the elastic telescopic tube is connected to a one-way exhaust pipe and a one-way intake pipe, respectively.

[0014] Preferably, one end of the unidirectional exhaust pipe is fixedly connected to a corrugated pipe, and one end of the corrugated pipe is equipped with a dispersion frame. The dispersion frame is fixedly connected to the side wall of the pneumatic clamp, and the side wall of the dispersion frame has a plurality of arrayed oblique holes.

[0015] The beneficial effects of this invention are: 1. This invention uses a motor, synchronous belt, and synchronous pulley to drive the rotating shaft to reciprocate within a limited range. A limiting plate and retaining ring provide mechanical restraint, while an induction ring and sensor control the motor's commutation, reducing the possibility of exceeding rotation limits. Simultaneously, the corrugated support ring, pressure column, limiting pin, limiting slot, and return spring work together to cause the winding held by the pneumatic clamp to oscillate up and down slightly during rotation. This promotes full contact of the insulating varnish with the winding surface and penetration into the inter-turn gaps, facilitating the removal of air bubbles, reducing impregnation dead zones, and improving the uniformity and penetration effect of the insulating varnish.

[0016] 2. This invention utilizes the reciprocating motion of the sleeve to drive the elastic telescopic tube to alternately stretch and compress, and forms directional exhaust through a one-way air inlet pipe, a one-way exhaust pipe, a corrugated pipe, and a dispersion frame. Before impregnation, the exhaust airflow can remove floating dust and impurities from the surface of the winding. After the winding is removed from the varnish, the airflow can promote the even flow of excess varnish and accelerate the initial drying of the surface. Since the dispersion frame is kept above the varnish surface, it can prevent gas from directly entering the varnish and generating bubbles or disturbing the varnish surface, thus taking into account the cleanliness of the winding, the quality of impregnation, and the efficiency of subsequent drying. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of a transformer winding insulating varnish uniform impregnation device provided by an embodiment of the present invention; Figure 2 This is a schematic diagram of the frame structure of a transformer winding insulating varnish uniform impregnation device provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the impregnation assembly structure of a transformer winding insulating varnish uniform impregnation device provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the synchronous pulley and synchronous belt structure of a transformer winding insulating varnish uniform impregnation device provided by an embodiment of the present invention; Figure 5 This is a schematic diagram of the mounting base structure of a transformer winding insulating varnish uniform impregnation device provided by an embodiment of the present invention; Figure 6 This invention provides a device for uniformly impregnating transformer winding insulating varnish. Figure 5 Enlarged schematic diagram of the structure at point A in the middle; Figure 7 This is a schematic diagram of the pneumatic gripper structure of a transformer winding insulating varnish uniform impregnation device provided by an embodiment of the present invention; Figure 8 This is a schematic diagram of the half-section structure of the rotating shaft of a transformer winding insulating varnish uniform impregnation device provided in an embodiment of the present invention; Figure 9 This is an exploded structural diagram of the shaft and sleeve of a transformer winding insulating varnish uniform impregnation device provided in an embodiment of the present invention; Figure 10 This is a schematic diagram of the exhaust module structure of a transformer winding insulating varnish uniform impregnation device provided by an embodiment of the present invention.

[0019] In the diagram: 1. Frame; 2. Drive unit; 3. Lifting slide rail; 4. Support plate; 5. Impregnation assembly; 51. Mounting column; 52. Synchronous pulley; 53. Motor; 54. Mounting base; 55. Clamping mechanism; 551. Stabilizing base; 552. Sleeve; 5521. Support ring; 5522. Support plate; 5523. Limit pin; 553. Pneumatic base; 554. Pneumatic clamping plate; 555. Fixed base; 556. Telescopic spring; 557. Fixing bolt; 558. Anti-slip pad; 559. Exhaust. Modules; 5591, One-way exhaust pipe; 5592, Corrugated pipe; 5593, Dispersion frame; 5594, Elastic telescopic pipe; 5595, Extension pipe; 5596, One-way intake pipe; 5597, Angled hole; 5510, Rotating shaft; 5511, Limiting slot; 5512, Return spring; 5513, Pressure plate; 56, Tensioning wheel; 57, Synchronous belt; 58, Limiting plate; 59, Retaining ring; 510, Sensor; 511, Sensing ring; 6, Immersion box; 7, Conveyor frame; 8, Pressure column. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0021] Reference Figures 1 to 10 A transformer winding insulating varnish uniform impregnation device includes a frame 1, a drive component 2 and a lifting slide rail 3. A support plate 4 is installed at one end of the lifting slide rail 3, and an impregnation component 5 is provided at one end of the support plate 4. The impregnation component 5 impregnates the transformer winding by lifting the lifting slide rail 3 up and down.

[0022] Furthermore, the inner side of the frame 1 is provided with an impregnation tank 6 and a conveyor frame 7, respectively. The drive unit 2 is located above the frame 1, and the drive unit 2 is connected to the lifting slide rail 3 for transmission. The impregnation assembly 5 is provided in two sets, each set of impregnation assembly 5 includes a mounting column 51 and a mounting base 54. One end of the mounting column 51 is fixedly connected to the mounting base 54, and the other end of the mounting column 51 is detachably connected to the support plate 4. A motor 53 is installed on the side wall of the mounting base 54, and one end of the motor 53 is connected to a synchronous belt 57 for transmission. One end of the mounting base 54 is... The assembly includes a limit plate 58 and a sensor 510. There are two limit plates 58, and the included angle between the two limit plates 58 is 90 degrees. The immersion assembly 5 includes a synchronous pulley 52 and a tensioning pulley 56. There are several synchronous pulleys 52 and tensioning pulleys 56. The synchronous pulleys 52 and tensioning pulleys 56 are arranged alternately. The synchronous pulleys 52 and tensioning pulleys 56 are connected to the synchronous belt 57 for transmission. One of the synchronous pulleys 52 has a retaining ring 59 on its side wall, and the other synchronous pulley 52 has a sensing ring 511 on its side wall.

[0023] It should be noted that during the impregnation operation, the pneumatic base 553 first drives the two pneumatic clamps 554 to move towards each other, so that the two anti-slip pads 558 respectively abut against the opposite sides of the winding to complete the clamping and positioning of the winding; then, the drive component 2 controls the movement of the lifting slide rail 3 to put the winding clamped by the impregnation assembly 5 into the impregnation box 6. The drive component 2 can also drive the lifting slide rail 3 to move along the X and Y coordinate axes. The specific movement is existing technology and will not be described in detail.

[0024] Before the windings enter the varnish, the motor 53 can be jogged at low speed to confirm the initial angles and forward / reverse directions of each clamping mechanism 55. After the windings enter the varnish, the motor 53 drives the windings alternately in both forward and reverse directions according to the set speed. The output shaft of the motor 53 is connected to the drive pulley (not shown in the figure). The drive pulley meshes with the synchronous belt 57, thereby driving the synchronous belt 57 to run. Under the tensioning and guiding action of several tensioning pulleys 56, the synchronous belt 57 sequentially drives several synchronous pulleys 52 to rotate synchronously. The tensioning pulleys 56 can maintain a suitable tension on the synchronous belt 57 and keep the synchronous belt 57 and each synchronous pulley 52 in a stable position. Stable transmission is achieved to reduce the possibility of tooth skipping or slippage during transmission. Since one end of each shaft 5510 is fixedly connected to the corresponding synchronous pulley 52, each synchronous pulley 52 can drive the corresponding shaft 5510 to rotate when it rotates. This, in turn, drives each clamping mechanism 55 and the winding held by the pneumatic clamp 554 to swing around the axis of the corresponding shaft 5510. Thus, the motor 53 drives each shaft 5510, the clamping mechanism 55 and the winding to rotate. The mounting column 51 and the mounting base 54 remain relatively fixed, rather than causing the entire impregnation assembly 5 to rotate relative to the support plate 4.

[0025] During the control of the rotation range, both the synchronous pulley 52 with a retaining ring 59 and the synchronous pulley 52 with a sensing ring 511 are driven by the same synchronous belt 57. Their rotation states correspond to each other. The extended part of the retaining ring 59 is located between two limiting plates 58, which respectively form the mechanical limiting boundaries for the retaining ring 59 when it rotates in the forward and reverse directions. The sensing ring 511 rotates with the corresponding synchronous pulley 52. ​​The sensor 510 detects the change in the sensing ring 511 relative to its detection position and outputs a corresponding detection signal to the external controller. The controller controls the circuit of the motor 53 to determine whether the synchronous pulley 52 has reached the preset angle based on the detection signal output by the sensor 510. After reaching the preset angle, the rotation direction of the motor 53 is switched, so that each shaft 5510 reciprocates in the forward and reverse directions within the angle range defined by the two limiting plates 58. During normal operation, non-contact position detection and reversing control are achieved through the sensing ring 511 and the sensor 510. The two limiting plates 58 and the retaining ring 59 forms a mechanical limit fit to prevent the rotating shaft 5510 from exceeding the allowable rotation range; the sensor 510 can be an inductive proximity sensor, and the sensing ring 511 is made of a metal material that can be detected by the inductive proximity sensor. The sensor 510 is fixed on the mounting base 54, with its detection end facing the rotation path of the sensing ring 511 and maintaining a set sensing gap with the sensing ring 511. The sensing ring 511 can be provided with a sensing part extending circumferentially and a clearance notch adjacent to the sensing part; when the sensing part rotates into the detection range of the sensor 510, the sensor 510 outputs a first detection signal. When the clearance notch rotates to the detection position of the sensor 510, the sensor 510 outputs a second detection signal. The control circuit of the motor 53 determines whether the synchronous pulley 52 and the rotating shaft 5510 have rotated to a preset angle according to the change of the output signal of the sensor 510, and controls the motor 53 to stop, decelerate or rotate in reverse accordingly, so that each clamping mechanism 55 reciprocates within a limited angle range.

[0026] By employing a limited-angle forward and reverse reciprocating rotation, pneumatic pipe entanglement caused by continuous rotation of each clamping mechanism 55 in the same direction can be avoided, and the possibility of interference between adjacent clamping mechanisms 55 or adjacent windings can be reduced. After the winding is immersed in the varnish, it performs low-speed reciprocating rotation, which can continuously change the posture of the winding relative to the varnish, allowing the varnish to enter the winding between turns and layers from different directions. At the same time, it is beneficial for the air trapped inside and on the surface of the winding to escape upward, thereby reducing the gas stagnation area formed by the winding maintaining a fixed posture and improving the uniformity of the insulating varnish penetration. The speed of the motor 53 and the switching rhythm of forward and reverse rotation can be adjusted according to the size, mass and viscosity of the winding and the viscosity of the varnish. The adjustment principle is to prevent the varnish from generating obvious eddies or a large number of bubbles, and to prevent the winding from swinging or slipping significantly. This avoids excessive speed causing varnish splashing, winding slippage or uneven impregnation. The rotational motion of the aforementioned shaft 5510 can also provide power for the axial reciprocating motion of the clamping mechanism 55 described below.

[0027] Reference Figures 5 to 9 Furthermore, the impregnation assembly 5 also includes a clamping mechanism 55, which includes a stabilizing base 551. A sleeve 552 is mounted on the upper end of the stabilizing base 551. A support plate 5522 is fixedly connected to the end of the sleeve 552 away from the stabilizing base 551. A support ring 5521 is fixedly connected to the side wall of the support plate 5522. A limit pin 5523 is installed on the outer wall of the sleeve 552. The clamping mechanism 55 also includes a fixing base 555, with both ends of the fixing base 555 connected to... There is a fixing bolt 557, one end of which passes through the fixing seat 555 and is threadedly connected to the stabilizing seat 551. The outer wall of the fixing bolt 557 is fitted with a telescopic spring 556. The lower end of the fixing seat 555 is equipped with a pneumatic seat 553. Pneumatic clamps 554 are slidably connected to the symmetrical sides of the pneumatic seat 553. The side walls of the pneumatic clamps 554 are provided with anti-slip pads 558. The two ends of the telescopic spring 556 abut against the side walls of the stabilizing seat 551 and the fixing seat 555, respectively.

[0028] It should be noted that in the above process, the motor 53 drives the rotating shaft 5510 to rotate via the synchronous belt 57 and the synchronous pulley 52. ​​Since the limiting pin 5523 is set on the sleeve 552 and extends into the limiting slot 5511 on the outer wall of the rotating shaft 5510, when the rotating shaft 5510 rotates, the circumferential sidewall of the limiting slot 5511 can apply a circumferential force to the limiting pin 5523, causing the rotating shaft 5510 to transmit torque to the sleeve 552, thereby driving the sleeve 5510 to rotate. 2. The support ring 5521, support plate 5522 and stabilizing seat 551, which are fixedly connected to the sleeve 552, rotate synchronously. At the same time, the limiting pin 5523 can slide along the length direction of the limiting slot 5511, so that the sleeve 552 can move axially back and forth relative to the rotating shaft 5510 while rotating with the rotating shaft 5510. The limiting slot 5511 can also limit the axial movement stroke of the limiting pin 5523 to prevent the axial displacement of the sleeve 552 from being too large.

[0029] Furthermore, the clamping mechanism 55 also includes a rotating shaft 5510. One end of the rotating shaft 5510 is fixedly connected to the synchronous pulley 52. ​​The outer wall of the rotating shaft 5510 is rotatably connected to the mounting base 54. Several pressure columns 8 are symmetrically distributed about the axis on the outer side of the rotating shaft 5510. The pressure columns 8 are fixedly connected to the side wall of the mounting base 54. One end of the pressure column 8 is slidably connected to the side wall of the support ring 5521. A pressure plate 5513 is fixedly connected to the end of the rotating shaft 5510 away from the synchronous pulley 52. ​​A limit slot 5511 is opened on the outer wall of the rotating shaft 5510. The limit slot 5511 is slidably connected to the limit pin 5523. The rotating shaft 5510 is slidably connected to the sleeve 552. A return spring 5512 is sleeved on the outer wall of the rotating shaft 5510. The two ends of the return spring 5512 are fixedly connected to the side walls of the sleeve 552 and the pressure plate 5513, respectively.

[0030] It should be noted that: the pressure column 8 is fixed on the mounting base 54. Therefore, during the rotation of the sleeve 552 and the support ring 5521, the pressure column 8 remains fixed relative to the mounting base 54, while the support ring 5521 rotates relative to the pressure column 8. The side wall of the support ring 5521 that contacts the pressure column 8 is configured with a corrugated structure that alternates circumferentially. This corrugated structure includes wave crests and wave troughs that are connected in sequence. When the support ring 5521 rotates to the wave crest and contacts the pressure column 8, the pressure column 8 passes through the wave crest. The part applies an axial force to the support ring 5521, causing the support ring 5521, support plate 5522, sleeve 552, and stabilizing seat 551 to move away from the mounting seat 54 along the axial direction of the rotating shaft 5510, and causing the return spring 5512 to undergo elastic deformation. As the support ring 5521 continues to rotate, the multiple pressure columns 8 move simultaneously from the crest to the trough, reducing the axial force applied by the pressure columns 8 to the support ring 5521, and the return spring 5512 releases its stored elastic potential. Yes, it can cause the sleeve 552 and its connected components to reset in the direction close to the mounting base 54. As the pressure column 8 passes through the crest and trough of the support ring 5521 in sequence, the sleeve 552 can periodically reciprocate along the axial direction of the rotating shaft 5510. The several pressure columns 8 are symmetrically distributed about the axis of the rotating shaft 5510, which can support and guide the support ring 5521 from different positions, so that the axial force on the support ring 5521 is more balanced, reducing the possibility of the sleeve 552 tilting, swaying or jamming during the reciprocating movement. The axial reciprocating stroke of the sleeve 552 is mainly determined by the height difference between the crest and trough of the support ring 5521, and its reciprocating frequency is related to the speed of the motor 53, the forward and reverse rotation rhythm of the rotating shaft 5510 and the number of corrugated structures on the support ring 5521. Therefore, the oscillation frequency of the winding can be changed by adjusting the speed and commutation rhythm of the motor 53, without the need to set up a separate lifting vibration drive mechanism.

[0031] Furthermore, when the sleeve 552 reciprocates axially, the motion is transmitted to the pneumatic base 553 and pneumatic clamp 554 through the stabilizing seat 551, fixing bolt 557, and fixing seat 555. This causes the winding held by the pneumatic clamp 554 to oscillate slightly up and down within the impregnation chamber 6. The telescopic spring 556 located between the stabilizing seat 551 and the fixing seat 555 can buffer the instantaneous impact generated by the reciprocating motion, reducing the possibility of vibration load being directly transmitted to the winding, causing winding deformation, insulation damage, or loosening of the clamp. During the impregnation process, the up and down oscillation of the winding can create a periodic interaction between the winding and the varnish. Axial relative flow promotes the repeated entry of varnish into the turns, layers and skeleton gaps of the winding, and facilitates the removal of air bubbles adhering to the winding surface and trapped inside the winding. This up-and-down oscillation, combined with the limited-angle reciprocating swing generated by the rotating shaft 5510, causes the winding to generate both axial and circumferential motion, thereby continuously changing the orientation of the winding in the varnish and the direction of varnish inflow. This reduces the gas retention area and impregnation dead zone formed under a fixed impregnation orientation, and improves the penetration depth and distribution uniformity of the insulating varnish. The oscillation amplitude and frequency should be controlled within the range where the winding does not swing or slip significantly and the varnish does not generate a large number of air bubbles or significant splashing.

[0032] When clamping the winding, the pneumatic seat 553 can be controlled by conventional air circuit to move the two pneumatic clamps 554 toward each other and abut against the opposite sides of the winding through the anti-slip pads 558 to complete the clamping of the winding; after the varnishing is completed, the varnishing assembly 5 is moved above the conveyor frame 7, and then the two pneumatic clamps 554 are moved back to back to release the winding. The specific air circuit structure of the pneumatic seat 553 and the control method for driving the movement of the pneumatic clamps 554 can adopt the existing parallel opening and closing pneumatic clamping structure, which will not be described in detail here. Example (II)

[0033] Reference Figure 8 and Figure 10 Furthermore, the clamping mechanism 55 also includes an exhaust module 559, which includes an elastic telescopic tube 5594. The elastic telescopic tube 5594 is located inside the fixed base 555. Both ends of the elastic telescopic tube 5594 are fixedly connected to the side walls of the pneumatic base 553 and the pressure plate 5513, respectively. Extension tubes 5595 are installed on both symmetrical sides of the outer wall of the elastic telescopic tube 5594. The extension tubes 5595 are connected to the fixed base 555. The end of the extension tube 5595 away from the elastic telescopic tube 5594 is connected to a one-way exhaust pipe 5591 and a one-way intake pipe 5596, respectively.

[0034] It should be noted that when the sleeve 552 reciprocates up and down along the axial direction of the rotating shaft 5510, the pneumatic seat 553 moves synchronously with the sleeve 552 and the stabilizing seat 551, while the pressure plate 5513 remains connected to the rotating shaft 5510. Therefore, the elastic telescopic tube 5594 connected between the pneumatic seat 553 and the pressure plate 5513 periodically lengthens and shortens with the change in the distance between them. The elastic telescopic tube 5594 and its connection with the extension tube 5595 remain sealed, allowing the elastic telescopic tube 5594 to change its internal volume when deformed, thus acting as a reciprocating airbag. When the pneumatic seat 553 moves away from the pressure plate 5513, the elastic telescopic tube 5594 lengthens, its internal volume increases, and a relative negative pressure is formed. At this time, the one-way air inlet pipe 5596 is opened under the action of the internal and external pressure difference. External air enters the elastic telescopic tube 5594 through the one-way intake pipe 5596 and the corresponding extension pipe 5595. At the same time, the one-way exhaust pipe 5591 remains closed to prevent external air from entering in the opposite direction from the exhaust path. When the pneumatic seat 553 moves towards the pressure plate 5513, the elastic telescopic tube 5594 shortens, its internal volume decreases, and the internal air pressure increases. At this time, the one-way intake pipe 5596 closes to prevent the gas in the elastic telescopic tube 5594 from being discharged in the opposite direction from the intake path. The one-way exhaust pipe 5591 is opened under the action of internal air pressure, allowing the gas stored in the elastic telescopic tube 5594 to enter the dispersion frame 5593 in sequence through the extension pipe 5595, the one-way exhaust pipe 5591, and the corrugated pipe 5592, and finally be ejected from the dispersion frame 5593 through several oblique holes 5597.

[0035] The gas flow direction is defined by the one-way air inlet pipe 5596 and the one-way exhaust pipe 5591. Each time the elastic telescopic tube 5594 completes its extension and retraction, it completes one intake and exhaust process. As the sleeve 552 continuously moves up and down, the dispersion frame 5593 can generate intermittent pulse airflow. The exhaust frequency of this airflow corresponds to the reciprocating frequency of the sleeve 552. The exhaust volume per cycle is mainly determined by the volume difference between the extended and retracted states of the elastic telescopic tube 5594. Therefore, this structure can generate airflow using the original reciprocating motion of the sleeve 552 without the need for an additional independent air supply device such as an air pump.

[0036] Furthermore, a bellows 5592 is fixedly connected to one end of the one-way exhaust pipe 5591, and a dispersion frame 5593 is installed at one end of the bellows 5592. The dispersion frame 5593 is fixedly connected to the side wall of the pneumatic clamp 554, and a number of arrayed oblique holes 5597 are opened on the side wall of the dispersion frame 5593.

[0037] It should be noted that the dispersion frame 5593 is located on the side of the pneumatic clamp 554, and its interior forms a gas distribution space that communicates with the bellows 5592 and each inclined hole 5597. After the gas enters the dispersion frame 5593, it can be dispersed and discharged through multiple inclined holes 5597, avoiding the airflow from concentrating on a local position of the winding. The inclined holes 5597 make the discharged airflow have an inclined direction relative to the winding surface, thereby forming a purging airflow flowing along the winding surface and expanding the airflow range. The bellows 5592 has bending and extension capabilities. When the pneumatic clamp 554 performs opening and closing movements or the relative position between the dispersion frame 5593 and the one-way exhaust pipe 5591 changes, the bellows 5592 can compensate for the corresponding displacement, preventing the exhaust pipe from being excessively stretched, bent, or detached.

[0038] Before impregnation, the winding can be held outside the impregnation tank 6, and the reciprocating motion of the sleeve 552 drives the elastic telescopic tube 5594 to perform air intake and exhaust. The dispersed airflow discharged through the inclined hole 5597 can blow away dust, debris and other impurities attached to the surface of the winding, reducing the possibility of impurities entering the insulating varnish with the winding and contaminating the varnish or being sealed in the insulating varnish layer. The purging operation before impregnation should be carried out before the winding is moved above the impregnation tank 6 to avoid the blown-off impurities falling directly into the impregnation tank 6. After impregnation, the drive component 2 controls the lifting slide rail 3 to rise, so that the winding is completely removed. The varnish is initially applied above the impregnation box 6. At this time, the low-flow pulsed airflow discharged from the dispersion frame 5593 can blow away the remaining varnish that has not yet dripped along the winding surface, promote the leveling of the remaining varnish and its convergence and dripping towards the lower part of the winding, and reduce the occurrence of local varnish accumulation at the bottom and corners of the winding. At the same time, the flowing gas can accelerate the evaporation of solvent or moisture on the winding surface, and play an auxiliary role in surface drying of the insulating varnish layer. The exhaust intensity should be controlled within the range that does not damage the continuity of the wet varnish layer, does not cause varnish splashing, and does not make the local varnish layer too thin, so as to avoid excessive airflow causing flow marks, pinholes, or uneven varnish layer thickness.

[0039] During the impregnation process, the winding is submerged to a set depth by controlling the descent stroke of the lifting slide rail 3, and the dispersion frame 5593 and the inclined hole 5597 are always above the surface of the insulating varnish. Therefore, even if the elastic telescopic tube 5594 continues to vent air with the reciprocating motion of the sleeve 552, the vented air will not directly enter the interior of the insulating varnish, thereby avoiding the generation of foam and microbubbles due to air being blown into the varnish, reducing the possibility of bubbles entering the winding turns and causing leakage, pinholes or internal cavities. The dispersion frame 5593 is kept apart from the varnish, which can also prevent the insulating varnish from entering the inclined hole 5597, the corrugated tube 5592 and the one-way exhaust pipe 5591, reducing the possibility of the insulating varnish clogging the exhaust channels after curing.

[0040] It should be noted that the specific model and specifications of electrical components such as motors need to be selected and determined based on the actual specifications of the device. The specific selection and calculation methods adopt existing technologies in this field, so they will not be described in detail here.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A device for uniformly impregnating transformer winding insulating varnish, comprising a frame (1), a drive component (2), and a lifting slide rail (3), wherein a support plate (4) is mounted on one end of the lifting slide rail (3), characterized in that, One end of the support plate (4) is provided with an impregnation assembly (5), which impregnates the transformer winding by moving the lifting slide rail (3) up and down.

2. The transformer winding insulating varnish uniform impregnation device according to claim 1, characterized in that, The inner side of the frame (1) is provided with a dyeing tank (6) and a conveyor (7). The drive unit (2) is located above the frame (1) and is connected to the lifting slide rail (3) for transmission.

3. The transformer winding insulating varnish uniform impregnation device according to claim 1, characterized in that, The impregnation assembly (5) is provided in two sets. Each set of the impregnation assembly (5) includes a mounting column (51) and a mounting base (54). One end of the mounting column (51) is fixedly connected to the mounting base (54), and the other end of the mounting column (51) is detachably connected to the support plate (4). A motor (53) is installed on the side wall of the mounting base (54). One end of the motor (53) is connected to a synchronous belt (57). One end of the mounting base (54) is provided with a limiting plate (58) and a sensor (510). There are two limiting plates (58), and the included angle between the two limiting plates (58) is ninety degrees.

4. The transformer winding insulating varnish uniform impregnation device according to claim 3, characterized in that, The impregnation assembly (5) includes a timing pulley (52) and a tension pulley (56). There are several timing pulleys (52) and tension pulleys (56). The timing pulleys (52) and tension pulleys (56) are arranged alternately. The timing pulleys (52) and tension pulleys (56) are connected to the timing belt (57) for transmission. One of the timing pulleys (52) has a retaining ring (59) on its side wall, and another timing pulley (52) has a sensing ring (511) on its side wall.

5. The transformer winding insulating varnish uniform impregnation device according to claim 4, characterized in that, The impregnation assembly (5) further includes a clamping mechanism (55), which includes a stabilizing seat (551), a sleeve (552) is installed on the upper end of the stabilizing seat (551), a support plate (5522) is fixedly connected to the end of the sleeve (552) away from the stabilizing seat (551), a support ring (5521) is fixedly connected to the side wall of the support plate (5522), and a limit pin (5523) is installed on the outer wall of the sleeve (552).

6. The transformer winding insulating varnish uniform impregnation device according to claim 5, characterized in that, The clamping mechanism (55) also includes a fixed seat (555), with fixed bolts (557) connected to both ends of the fixed seat (555). One end of the fixed bolt (557) passes through the fixed seat (555) and is threadedly connected to the stabilizing seat (551). A telescopic spring (556) is sleeved on the outer wall of the fixed bolt (557). A pneumatic seat (553) is installed at the lower end of the fixed seat (555). Pneumatic clamps (554) are slidably connected to the symmetrical sides of the pneumatic seat (553). Anti-slip pads (558) are provided on the side walls of the pneumatic clamps (554). The two ends of the telescopic spring (556) abut against the side walls of the stabilizing seat (551) and the fixed seat (555), respectively.

7. The transformer winding insulating varnish uniform impregnation device according to claim 6, characterized in that, The clamping mechanism (55) also includes a rotating shaft (5510), one end of which is fixedly connected to a synchronous pulley (52), the outer wall of which is rotatably connected to a mounting base (54), and a number of pressure columns (8) symmetrically distributed about the axis are provided on the outer side of the rotating shaft (5510). The pressure columns (8) are fixedly connected to the side wall of the mounting base (54), and one end of the pressure column (8) is slidably connected to the side wall of the support ring (5521).

8. The transformer winding insulating varnish uniform impregnation device according to claim 7, characterized in that, A pressure plate (5513) is fixedly connected to one end of the rotating shaft (5510) away from the synchronous pulley (52). A limit slot (5511) is opened on the outer wall of the rotating shaft (5510). The limit slot (5511) is slidably connected to the limit pin (5523). The rotating shaft (5510) is slidably connected to the sleeve (552). A return spring (5512) is sleeved on the outer wall of the rotating shaft (5510). The two ends of the return spring (5512) are fixedly connected to the side walls of the sleeve (552) and the pressure plate (5513), respectively.

9. The transformer winding insulating varnish uniform impregnation device according to claim 8, characterized in that, The clamping mechanism (55) further includes an exhaust module (559), which includes an elastic telescopic tube (5594). The elastic telescopic tube (5594) is located inside the fixed base (555). Both ends of the elastic telescopic tube (5594) are fixedly connected to the side walls of the pneumatic base (553) and the pressure plate (5513), respectively. Extension tubes (5595) are installed on both symmetrical sides of the outer wall of the elastic telescopic tube (5594). The extension tubes (5595) are connected to the fixed base (555). The end of the extension tube (5595) away from the elastic telescopic tube (5594) is connected to a one-way exhaust pipe (5591) and a one-way intake pipe (5596), respectively.

10. The transformer winding insulating varnish uniform impregnation device according to claim 9, characterized in that, One end of the one-way exhaust pipe (5591) is fixedly connected to a corrugated pipe (5592), and a dispersion frame (5593) is installed at one end of the corrugated pipe (5592). The dispersion frame (5593) is fixedly connected to the side wall of the pneumatic clamp (554), and the side wall of the dispersion frame (5593) is provided with a plurality of arrayed oblique holes (5597).

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