Automatic impregnation device for winding capacitor

Abstract

The invention provides a winding capacitor automatic impregnation device, which comprises a frame body, a liquid containing disc, a lifting mechanism and a processing unit, and is characterized in that a first end of the lifting mechanism is connected with the frame body, a second end of the lifting mechanism is connected with the liquid containing disc, the lifting mechanism is used for driving the liquid containing disc to move vertically and be positioned, a first electrode is arranged on the frame body, and a second electrode is arranged on the liquid containing disc; the frame body and the liquid containing disc have electrical conductivity, and the liquid containing disc is insulated from the frame body; the liquid containing disc is used for containing conductive impregnation liquid, and a part to be impregnated is arranged on the frame body and electrically communicated with the frame body. The driving mechanism drives the liquid containing disc to move in the vertical direction and conduct soaking on the to-be-soaked part after the liquid containing disc is positioned, and when the liquid containing disc moves in the vertical direction to drive the soaking liquid to make contact with the to-be-soaked part, the first electrode on the frame body and the second electrode on the liquid containing disc are conducted, and a calibration signal is sent out; the processing unit is used for receiving the calibration signal for zero calibration and further used for sending out an infiltration control signal after receiving the calibration signal, and the lifting mechanism responds to the infiltration control signal to ascend by a preset height.

Description

Technical Field

[0001] The invention relates to the technical field of capacitor impregnation equipment, and in particular to an automatic capacitor impregnation device. Background Art

[0002] In the production process of electrolytic capacitors, it is necessary to place the wound capacitor core group into the impregnation liquid for impregnation. The capacitor core includes a wound metal layer and two pins. During the impregnation process, the wound metal layer needs to be extended downward into the impregnation liquid for impregnation, so that the impregnation liquid enters between the metal layers. If the capacitor core is extended too deep into the impregnation liquid, the impregnation liquid will adhere to the pins of the capacitor. After the impregnation liquid adheres to the pins and dries, it will affect the performance of the capacitor when in use. This is mainly manifested in that after the capacitor is soldered to the circuit board, the periphery of the capacitor pins is connected to the circuit board, and a layer of diaphragm formed by the dried impregnation liquid between the pins adhered to the impregnation liquid and the circuit board circuit will form. This diaphragm has poor conductivity, which will seriously affect the conductivity between the capacitor and the external circuit, thereby affecting the performance of the capacitor. Therefore, it is necessary to be extra careful when impregnating the capacitor core, and the impregnation liquid must not be soaked into the pins of the capacitor core. The existing equipment manually places the capacitor core row on a rack of a fixed height for impregnation, and the height of the rack from the liquid level of the impregnation liquid is adjusted by a pad. During the impregnation process, workers are required to connect the capacitor core row to the fixed rack for impregnation. When the metal winding layer lengths of different types of capacitor core rows are different, it is necessary to use pads of corresponding height for each type. Alternatively, when the height of the impregnation liquid level is uncertain, the impregnated product is prone to not being fully impregnated (the end of the capacitor close to the pin is not impregnated) or over-impregnation (the pins of the capacitor are also impregnated).

[0003] In summary, there is an urgent need for an automatic impregnation device for wound capacitors to solve or at least partially solve the problems existing in the prior art. Summary of the invention

[0004] The present invention aims to provide an automatic impregnation device for wound capacitors, aiming to solve the problem that in existing impregnation devices, different types of capacitors need to be matched with specific pads to adjust the impregnation depth, and the adjustment is time-consuming and labor-intensive.

[0005] After research, it was found that the prior art did not consider adjusting the height of the immersion tray.

[0006] The specific technical solutions are as follows:

[0007] A wound capacitor automatic impregnation device comprises a frame, a liquid receiving tray, a lifting mechanism and a processing unit, wherein a first end of the lifting mechanism is connected to the frame, a second end of the lifting mechanism is connected to the liquid receiving tray, the lifting mechanism is used to drive the liquid receiving tray to move vertically and position, a first electrode is arranged on the frame, a second electrode is arranged on the liquid receiving tray, the frame and the liquid receiving tray are conductive, and the liquid receiving tray is insulated from the frame;

[0008] The liquid receiving tray is used to hold the conductive impregnation liquid. The workpiece to be impregnated is arranged on the frame and electrically connected to the frame. The liquid receiving tray is driven by the driving mechanism to move vertically and position the workpiece to be impregnated. When the liquid receiving tray moves vertically and drives the impregnation liquid to contact the workpiece to be impregnated, the first electrode on the frame is connected to the second electrode on the liquid receiving tray to send out a calibration signal.

[0009] The processing unit is used to receive the calibration signal to perform zero-position calibration. The processing unit is also used to send out an immersion control signal after receiving the calibration signal. The lifting mechanism rises to a preset height in response to the immersion control signal.

[0010] Furthermore, it also includes a liquid supply system, which includes a liquid storage tank and a conveying component. The liquid storage tank is arranged on the frame and located at the lower part of the liquid receiving tray. The liquid storage tank is used to store the impregnation liquid. The liquid receiving tray is provided with a liquid storage tank. The conveying component is used to convey the impregnation liquid in the liquid storage tank to the liquid storage tank.

[0011] Furthermore, the delivery assembly includes a sleeve, a delivery pipe, a piston, a first one-way valve and a second one-way valve. The sleeve is arranged at the bottom of the liquid storage tank, the first end of the delivery pipe extends into the sleeve and is fixedly connected to the piston, the second end of the delivery pipe extends upward to the outside of the sleeve and is fixedly connected to the liquid storage tray, the first end of the delivery pipe is connected to the sleeve through a through hole on the piston, and the second end of the delivery pipe is connected to the liquid storage tank, the piston is slidably connected in the sleeve, and a variable volume chamber with a variable volume is enclosed between the piston and the sleeve, the first one-way valve is arranged on the delivery pipe, and the second one-way valve is arranged at the bottom of the sleeve.

[0012] Furthermore, a liquid flow stabilizing plate is arranged at the bottom of the liquid receiving tray, a liquid inlet groove is provided at the bottom of the liquid receiving tray, the bottom of the liquid inlet groove is connected with the delivery pipe, the liquid flow stabilizing plate covers the liquid inlet groove, and a plurality of through holes are arranged on the liquid flow stabilizing plate, and the through holes connect the liquid inlet groove and the liquid storage tank.

[0013] Furthermore, the liquid supply system also includes a reflux pipe, an overflow trough is arranged on the liquid receiving tray, one end of the reflux pipe is connected to the overflow trough, and the other end of the reflux pipe is connected to the liquid storage tank.

[0014] Furthermore, an air hole is arranged in the middle of the sleeve, and the air hole is arranged through the side wall of the sleeve.

[0015] Furthermore, the lifting mechanism includes an electric push rod and a guide rod, and the electric push rod and the guide rod are both arranged between the frame and the liquid receiving tray, and the electric push rod and the guide rod are arranged in parallel.

[0016] Furthermore, the electric push rod is arranged below the middle of the liquid receiving tray, and a plurality of guide rods are arranged, and the plurality of guide rods are respectively arranged at each corner of the liquid receiving tray.

[0017] Furthermore, two support plates are arranged on the frame, at least one of which is made of conductive material, and the support plate made of conductive material is conductively connected to the frame, and the two support plates are respectively located on both sides of the liquid receiving tray.

[0018] The application of the technical solution of the present invention has the following beneficial effects:

[0019] When the capacitor is impregnated, the workpiece to be impregnated is arranged on the frame. The workpiece to be impregnated is actually a workpiece composed of multiple capacitor cores neatly welded on the same aluminum plate. At this time, the capacitor core is connected to the frame supporting the aluminum plate through the aluminum plate. When it is necessary to perform an immersion operation on the workpiece to be impregnated, the lifting mechanism controls the liquid holding plate to move upward, so that the liquid holding plate approaches the workpiece to be impregnated, until the impregnation liquid in the liquid holding plate just contacts the wound metal layer on the capacitor core, and the first electrode is connected to the second electrode. At this time, the processing unit receives the calibration signal for zero position calibration and sends out an immersion control signal. The lifting mechanism responds to the immersion control signal and pushes the liquid holding plate to rise to a preset height. During the rising process of the liquid holding plate, the metal winding layer of the capacitor core slowly immerses into the impregnation liquid in the liquid holding plate. The lifting mechanism controls the liquid holding plate to rise to a preset height and then stops rising, and maintains it for a certain period of time, so that the metal winding layer is infiltrated and the lifting mechanism moves downward and resets, completing a immersion operation. The distance that the lifting mechanism controls the liquid tray to rise is related to the model of the capacitor core. The height of the metal winding layer of different types of capacitors is different, so the capacitor core is soaked to different heights during the soaking process. The height of the liquid tray controlled by the lifting mechanism is set by the control unit. The device can automatically perform the soaking operation on the capacitor core. When changing the capacitor model, only the control unit needs to be set, and there is no need to adjust the height of the pad. The soaking process is automatic and no manual intervention is required, making the operation faster and improving the efficiency of soaking.

[0020] In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. Figure 1-Figure 5 , the present invention is further described in detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0022] Figure 1 It is a schematic diagram of the overall structure of an automatic impregnation device for wound capacitors of the present invention;

[0023] Figure 2 It is a schematic diagram of the internal structure of an automatic impregnation device for wound capacitors of the present invention;

[0024] Figure 3 yes Figure 2 Magnified view at A in the middle;

[0025] Figure 4 It is a schematic diagram of the overall structure of a liquid supply system of an automatic impregnation device for a wound capacitor of the present invention;

[0026] Figure 5 It is a partial enlarged view of a conveying component of an automatic impregnation device for wound capacitors of the present invention.

[0027] Among them, 1. frame; 11. support plate; 2. liquid holding tray; 21. liquid storage tank; 22. overflow tank; 23. liquid flow stabilizing plate; 231. through hole; 24. liquid inlet tank; 3. lifting mechanism; 31. electric push rod; 32. guide rod; 4. liquid supply system; 41. liquid storage tank; 42. conveying assembly; 421. sleeve; 4211. air hole; 422. conveying pipe; 423. piston; 424. first one-way valve; 425. second one-way valve; 426. variable volume chamber; 43. reflux pipe; 5. processing unit. DETAILED DESCRIPTION

[0028] In order to facilitate the understanding of the present invention, the present invention will be described more fully below, and preferred embodiments of the present invention are provided. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0030] Example:

[0031] See also Figure 1-Figure 5The present embodiment provides an automatic impregnation device for a wound capacitor, comprising a frame 1, a liquid receiving tray 2, a lifting mechanism 3 and a processing unit 5, wherein a first end of the lifting mechanism 3 is connected to the frame 1, a second end of the lifting mechanism 3 is connected to the liquid receiving tray 2, the lifting mechanism 3 is used to drive the liquid receiving tray 2 to move vertically and position, a first electrode is arranged on the frame 1, a second electrode is arranged on the liquid receiving tray 2, the frame 1 and the liquid receiving tray 2 are conductive, and the liquid receiving tray 2 is insulated from the frame 1;

[0032] The liquid holding tray 2 is used to hold the conductive impregnation liquid. The workpiece to be impregnated is arranged on the frame 1 and electrically connected to the frame 1. The liquid holding tray 2 is driven by the driving mechanism to move vertically and position the workpiece to be impregnated. When the liquid holding tray 2 moves vertically and drives the impregnation liquid to contact the workpiece to be impregnated, the first electrode on the frame 1 and the second electrode on the liquid holding tray 2 are connected to send out a calibration signal.

[0033] The processing unit 5 is used to receive the calibration signal to perform zero-position calibration. The processing unit 5 is also used to send an infiltration control signal after receiving the calibration signal. The lifting mechanism 3 rises to a preset height in response to the infiltration control signal.

[0034] It should be noted that when the capacitor is impregnated, the workpiece to be impregnated is arranged on the frame 1. The workpiece to be impregnated is actually a workpiece composed of multiple capacitor cores neatly welded on the same aluminum plate. At this time, the capacitor core is connected to the frame 1 supporting the aluminum plate through the aluminum plate. When it is necessary to perform an immersion operation on the workpiece to be impregnated, the lifting mechanism 3 controls the liquid holding tray 2 to move upward, so that the liquid holding tray 2 approaches the workpiece to be impregnated, until the impregnation liquid in the liquid holding tray 2 just contacts the wound metal layer on the capacitor core, and the first electrode is connected to the second electrode. At this time, the processing unit 5 receives the calibration signal for zero position calibration and sends an immersion control signal. The lifting mechanism 3 responds to the immersion control signal and pushes the liquid holding tray 2 to rise to a preset height. During the rising process of the liquid holding tray 2, the metal winding layer of the capacitor core slowly immerses into the impregnation liquid in the liquid holding tray 2. The lifting mechanism 3 controls the liquid holding tray 2 to rise to a preset height and then stops rising, and maintains it for a certain period of time, so that the metal winding layer is infiltrated and the lifting mechanism 3 moves downward and resets, completing a immersion operation. The lifting mechanism 3 controls the rising distance of the liquid tray 2 to be related to the model of the capacitor core. The height of the metal winding layer of capacitors of different models is different, so the capacitor core is soaked to different heights during the soaking process. The lifting mechanism 3 controls the rising height of the liquid tray 2 to be set by the control unit. The device can automatically perform the soaking operation on the capacitor core. When changing the capacitor model, only the control unit needs to be set, and there is no need to adjust the height of the pad. The soaking process is carried out automatically without manual intervention, making the operation faster and improving the efficiency of the soaking.

[0035] Furthermore, the liquid supply system 4 is also included, and the liquid supply system 4 includes a liquid storage tank 41 and a conveying component 42. The liquid storage tank 41 is arranged on the frame 1 and located at the lower part of the liquid receiving tray 2. The liquid storage tank 41 is used to store the impregnation liquid. The liquid receiving tray 2 is arranged with a liquid storage tank 21. The conveying component 42 is used to convey the impregnation liquid in the liquid storage tank 41 to the liquid storage tank 21. It can be understood that each time an impregnation work is completed, the impregnation liquid in the liquid receiving tray 2 is reduced accordingly, and the impregnation liquid in the liquid receiving tray 2 needs to be compensated before the next impregnation work. The impregnation liquid in the liquid storage tank 41 is conveyed to the liquid storage tank 21 in the liquid receiving tray 2 by the conveying component 42 for storage, thereby compensating the impregnation liquid in the liquid receiving tray 2, so that the device can work in a cycle.

[0036] Preferably, the delivery assembly 42 includes a sleeve 421, a delivery pipe 422, a piston 423, a first one-way valve 424 and a second one-way valve 425. The sleeve 421 is arranged at the bottom of the liquid storage tank 41. The first end of the delivery pipe 422 extends into the sleeve 421 and is fixedly connected to the piston 423. The second end of the delivery pipe 422 extends upward to the outside of the sleeve 421 and is fixedly connected to the liquid receiving tray 2. The first end of the delivery pipe 422 is connected to the sleeve 421 through a through hole on the piston 423, and the second end of the delivery pipe 422 is connected to the liquid storage tank 21. The piston 423 is slidably connected in the sleeve 421. The piston 423 and the sleeve 421 together form a variable volume chamber 426. The first one-way valve 424 is arranged on the delivery pipe 422, and the second one-way valve 425 is arranged at the bottom of the sleeve 421. Specifically, a seal (not shown in the drawings) is arranged between the piston 423 and the inner wall of the sleeve 421 , so that when the piston 423 moves relative to the sleeve 421 , the piston 423 and the sleeve 421 always maintain a sealed connection state. It can be understood that when the lifting mechanism 3 controls the liquid holding tray 2 to move upward, it drives the delivery pipe 422 and the piston 423 to move upward, and the piston 423 draws the impregnation liquid in the liquid storage tank 41 into the variable volume chamber 426 through the second one-way valve 425 during the upward movement. At this time, the variable volume chamber 426 is full of impregnation liquid. When the liquid holding tray 2 completes the impregnation of the capacitor core, the lifting mechanism 3 drives the liquid holding tray 2, the delivery pipe 422 and the piston 423 to move downward. During the downward movement of the piston 423, the volume of the variable volume chamber 426 becomes smaller, and the impregnation liquid in the variable volume chamber 426 is squeezed out from the first one-way valve 424 and the delivery pipe 422 to the liquid storage tank 21 in the liquid holding tray 2, thereby replenishing the impregnation liquid in the liquid holding tray 2 to prepare for the next impregnation.

[0037] Furthermore, a liquid flow stabilizing plate 23 is arranged at the bottom of the liquid receiving tray 2, and a liquid inlet groove 24 is provided at the bottom of the liquid receiving tray 2. The bottom of the liquid inlet groove 24 is connected to the delivery pipe 422. The liquid flow stabilizing plate 23 covers the liquid inlet groove 24, and a plurality of through holes 231 are arranged on the liquid flow stabilizing plate 23. The through holes 231 connect the liquid inlet groove 24 and the liquid storage tank 21. It can be understood that when the lifting mechanism 3 drives the liquid holding plate 2 to move downward, the delivery pipe 422 and the piston 423 are driven downward, so that the impregnation liquid in the variable volume chamber enters the liquid inlet tank 24 through the delivery pipe 422 and flows horizontally in the liquid inlet tank 24. After the impregnation liquid flows from the delivery pipe 422 to the liquid inlet tank 24, the flow cross-sectional area becomes larger, which slows down the flow rate of the impregnation liquid, and slowly and evenly flows from the through hole 231 on the liquid flow stabilizing plate 23 to the liquid storage tank 21, reducing the flow rate of the impregnation liquid, thereby reducing the generation of turbulence. In addition, the delivery pipe 422 is blocked by the liquid flow stabilizing plate 23 to reduce the turbulence caused by the direct injection of the impregnation liquid delivered by the delivery pipe 422.

[0038] Furthermore, the liquid supply system 4 further includes a reflux pipe 43, an overflow groove 22 is arranged on the liquid receiving tray 2, one end of the reflux pipe 43 is connected to the overflow groove 22, and the other end of the reflux pipe 43 is connected to the liquid storage tank 41. It can be understood that when too much impregnation liquid enters the liquid storage tank 21 from the delivery pipe 422, the excess impregnation liquid overflows through the overflow groove 22 and flows back to the liquid storage tank 41 through the reflux pipe 43, so that before each impregnation of the capacitor core, the liquid level of the impregnation liquid in the liquid storage tank 21 is always maintained at a constant value.

[0039] Furthermore, an air hole 4211 is arranged in the middle of the sleeve 421 , and the air hole 4211 penetrates the side wall of the sleeve 421 . It can be understood that by arranging the air hole 4211 in the middle of the sleeve 421, when the piston 423 in the sleeve 421 moves upward from the bottom of the sleeve 421, the impregnation liquid in the liquid storage tank 21 will be drawn into the variable chamber through the second one-way valve 425, and when the bottom plane of the piston 423 exceeds the air hole 4211, the external gas enters the variable chamber from the air hole 4211, at this time, the impregnation liquid no longer enters the variable chamber, and the second one-way valve 425 prevents the impregnation liquid from flowing out of the variable chamber, at this time, the amount of impregnation liquid in the variable chamber no longer increases with the rise of the piston 423, when the piston 423 descends, the gas in the variable chamber is pressed out from the air hole 4211 until the piston 423 blocks the air hole 4211, at this time, as the piston 423 continues to descend, the impregnation liquid in the variable chamber is delivered to the liquid storage tank 21 through the delivery pipe 422 and the first one-way valve 424. Through the arrangement of the air holes 4211, the volume of liquid delivered to the liquid storage tank 21 each time can be equal, and the amount of immersion liquid delivered each time is not too much, so that the delivery is stable and energy is saved.

[0040] Furthermore, the lifting mechanism 3 includes an electric push rod 31 and a guide rod 32, both of which are arranged between the frame 1 and the liquid receiving tray 2, and the electric push rod 31 and the guide rod 32 are arranged in parallel. Specifically, the electric push rod 31 is arranged below the middle of the liquid receiving tray 2, and four guide rods 32 are arranged, and the four guide rods 32 are arranged at the four corners of the liquid receiving tray 2. The liquid receiving tray 2, the delivery pipe 422 and the piston 423 are controlled to rise or fall by extending or retracting the electric push rod 31, and the stability of the up and down movement of the liquid receiving tray 2 is improved by the guide rod 32.

[0041] Furthermore, two support plates 11 are arranged on the frame 1, wherein at least one support plate 11 is made of a conductive material, and the support plate 11 made of the conductive material is arranged in conduction with the frame 1, and the two support plates 11 are respectively located on both sides of the liquid receiving tray 2. Specifically, the tops of the two support plates 11 are in the same horizontal plane. It can be understood that by arranging the support plates 11 on the frame 1, multiple capacitor core rows that need to be impregnated are positioned and supported, so that after the capacitor core rows are overlapped on the support plates 11, the bottoms of each capacitor core row are kept in the same plane, so as to facilitate subsequent impregnation. In addition, the two support plates 11 are arranged protruding from the frame 1, so that the tooling for supporting the capacitor core rows can be conveniently placed, which is conducive to taking and placing multiple capacitor core rows.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic impregnation device for wound capacitors, characterized in that: The invention comprises a frame (1), a liquid receiving tray (2), a lifting mechanism (3) and a processing unit (5), wherein a first end of the lifting mechanism (3) is connected to the frame (1), a second end of the lifting mechanism (3) is connected to the liquid receiving tray (2), the lifting mechanism (3) is used to drive the liquid receiving tray (2) to move vertically and position, a first electrode is arranged on the frame (1), a second electrode is arranged on the liquid receiving tray (2), the frame (1) and the liquid receiving tray (2) are conductive, and the liquid receiving tray (2) is insulated from the frame (1); The liquid holding tray (2) is used to hold a conductive impregnation liquid. The workpiece to be impregnated is arranged on the frame (1) and electrically connected to the frame (1). The liquid holding tray (2) is driven by the driving mechanism to move vertically and position the workpiece to be impregnated. When the liquid holding tray (2) moves vertically and drives the impregnation liquid to contact the workpiece to be impregnated, a first electrode on the frame (1) and a second electrode on the liquid holding tray (2) are electrically connected to generate a calibration signal. The processing unit (5) is used to receive the calibration signal to perform zero-position calibration. The processing unit (5) is also used to send an infiltration control signal after receiving the calibration signal. The lifting mechanism (3) rises to a preset height in response to the infiltration control signal.

2. The automatic impregnation device for wound capacitors according to claim 1, characterized in that: The invention also comprises a liquid supply system (4), wherein the liquid supply system (4) comprises a liquid storage tank (41) and a conveying assembly (42), wherein the liquid storage tank (41) is arranged on the frame (1) and located at the lower part of the liquid receiving tray (2), the liquid storage tank (41) is used to store the impregnation liquid, a liquid storage tank (21) is arranged in the liquid receiving tray (2), and the conveying assembly (42) is used to convey the impregnation liquid in the liquid storage tank (41) to the liquid storage tank (21).

3. The automatic impregnation device for wound capacitors according to claim 2, characterized in that: The delivery assembly (42) comprises a sleeve (421), a delivery pipe (422), a piston (423), a first one-way valve (424) and a second one-way valve (425); the sleeve (421) is arranged at the bottom of the liquid storage tank (41); a first end of the delivery pipe (422) extends into the sleeve (421) and is fixedly connected to the piston (423); a second end of the delivery pipe (422) extends upwardly out of the sleeve (421) and is fixedly connected to the liquid receiving tray (2); and the delivery pipe (422) is arranged at the bottom of the liquid storage tank (41); The first end of the delivery pipe (422) is connected to the sleeve (421) through a through hole on the piston (423), and the second end of the delivery pipe (422) is connected to the liquid storage tank (21), the piston (423) is slidably connected in the sleeve (421), and a variable volume chamber (426) with a variable volume is enclosed between the piston (423) and the sleeve (421), the first one-way valve (424) is arranged on the delivery pipe (422), and the second one-way valve (425) is arranged at the bottom of the sleeve (421).

4. The automatic impregnation device for wound capacitors according to claim 3, characterized in that: A liquid flow stabilizing plate (23) is arranged at the bottom of the liquid receiving tray (2), a liquid inlet groove (24) is arranged at the bottom of the liquid receiving tray (2), the bottom of the liquid inlet groove (24) is connected to the delivery pipe (422), the liquid flow stabilizing plate (23) covers the liquid inlet groove (24), and a plurality of through holes (231) are arranged on the liquid flow stabilizing plate (23), and the through holes (231) connect the liquid inlet groove (24) with the liquid storage tank (21).

5. The automatic impregnation device for wound capacitors according to claim 2, characterized in that: The liquid supply system (4) further comprises a reflux pipe (43), an overflow trough (22) is arranged on the liquid receiving tray (2), one end of the reflux pipe (43) is connected to the overflow trough (22), and the other end of the reflux pipe (43) is connected to the liquid storage tank (41).

6. The automatic impregnation device for wound capacitors according to claim 3, characterized in that: An air hole (4211) is arranged in the middle of the sleeve (421), and the air hole (4211) is arranged through the side wall of the sleeve (421).

7. An automatic impregnation device for wound capacitors according to any one of claims 1 to 6, characterized in that: The lifting mechanism (3) comprises an electric push rod (31) and a guide rod (32), wherein the electric push rod (31) and the guide rod (32) are both arranged between the frame (1) and the liquid receiving tray (2), and the electric push rod (31) and the guide rod (32) are arranged in parallel.

8. The automatic impregnation device for wound capacitors according to claim 7, characterized in that: The electric push rod (31) is arranged below the middle of the liquid receiving tray (2), and a plurality of guide rods (32) are arranged, and the plurality of guide rods (32) are respectively arranged at each corner of the liquid receiving tray (2).

9. An automatic impregnation device for wound capacitors according to any one of claims 1 to 6, characterized in that: Two support plates (11) are arranged on the frame (1), wherein at least one of the support plates (11) is made of a conductive material, and the support plate (11) made of the conductive material is arranged in electrical communication with the frame (1), and the two support plates (11) are respectively located on both sides of the liquid receiving tray (2).

Images