Pressurized impregnation device for aluminum electrolytic capacitor

Abstract

The utility model discloses a pressurized impregnation device for an aluminum electrolytic capacitor, belongs to the technical field of pressurized impregnation, and aims to solve the problems that in the prior art, when the capacitor is impregnated, the capacitor is stacked in a screen frame and then descends into electrolyte in a box body to be impregnated, so that the operation is inconvenient and the like. Therefore, the innermost capacitor in the stacked capacitors is less in contact with the electrolyte than the outer capacitor, so that the impregnation efficiency of the innermost capacitor is lower than that of the outer capacitor, and the impregnation efficiency of the capacitors in the same screen frame is not uniform. Comprising an electrolytic tank, supporting rods are fixedly connected to the four corners of the upper side of the electrolytic tank, a top plate is fixedly connected to the upper ends of the supporting rods, impregnation mechanisms are arranged at the inner end and the outer end of the electrolytic tank, and each impregnation mechanism comprises a hydraulic cylinder installed in the middle of the upper side of the top plate; the right end of the lower side of the cover plate is fixedly connected with a connecting plate.

Description

Technical Field

[0001] This utility model belongs to the field of pressure impregnation technology, specifically relating to a pressure impregnation device for aluminum electrolytic capacitors. Background Technology

[0002] In the manufacturing process of aluminum electrolytic capacitors, electrolyte impregnation is a crucial technology. For high-voltage aluminum electrolytic capacitors, due to voltage withstand requirements, the electrolytic paper used is thicker and has a higher density. In addition, the viscosity of the high-voltage electrolyte is also relatively high, making it difficult to impregnate the capacitors. Therefore, a pressurized impregnation device is needed to impregnate the capacitors.

[0003] For example, patent CN220651841U discloses a pressurized impregnation device for aluminum electrolytic capacitors. The device involves injecting electrolyte into a housing, placing the aluminum electrolytic capacitor component to be impregnated within a mesh frame, and closing the housing. An external power source is then connected to a vacuum pump to evacuate the housing, simultaneously expelling air from the capacitor core. A cylinder then moves the mesh frame downwards, immersing the capacitor core in the lower electrolyte. Impregnation occurs for a period under negative pressure, followed by pressurization via a booster pump. This pressurized impregnation continues for a period, and once complete, a sliding frame moves upwards. The booster pump continues blowing air, opening the vent and accelerating the airflow rate inside the housing, thus facilitating surface drying of the impregnated workpiece. This invention, through dynamic pressure conversion, significantly improves the impregnation efficiency of electrolytic capacitors and reduces the impregnation cycle.

[0004] However, when the capacitors are impregnated by this impregnation device, the capacitors are piled up in the mesh frame and then moved down into the electrolyte in the box for impregnation. As a result, the innermost capacitors in the pile will have less contact with the electrolyte than the outermost capacitors, resulting in a lower impregnation efficiency for the innermost capacitors than for the outermost capacitors. This leads to uneven impregnation efficiency among the capacitors in the same mesh frame. Utility Model Content

[0005] (1) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, the purpose of this invention is to provide a pressure-applying impregnation device for aluminum electrolytic capacitors. This device aims to solve the problem that in existing technologies, when impregnating capacitors, they are stacked in a mesh frame before being lowered into the electrolyte in the housing. As a result, the innermost capacitors in the stack have less contact with the electrolyte than the outermost capacitors, leading to a lower impregnation efficiency for the innermost capacitors compared to the outermost capacitors. This, in turn, results in uneven impregnation efficiency among the capacitors within the same mesh frame.

[0007] (2) Technical solution

[0008] To solve the above-mentioned technical problems, this utility model provides a pressurized impregnation device for aluminum electrolytic capacitors, including an electrolytic cell. Support rods are fixedly connected to the four upper corners of the electrolytic cell. A top plate is fixedly connected to the upper end of each support rod. Impregnation mechanisms are provided at both the inner and outer ends of the electrolytic cell. Each impregnation mechanism includes a hydraulic cylinder installed at the middle position of the upper part of the top plate. A cover plate is fixedly connected to the lower end of the output shaft of the hydraulic cylinder. A connecting plate is fixedly connected to the right end of the lower side of the cover plate. A round shaft is connected to the lower end of the connecting plate. A limit ring is fixedly connected to the left end of the outer side of the round shaft. A driven bevel gear is fixedly connected to the outer side of the right end of the round shaft. A motor is installed at the right end of the lower side of the cover plate. A rotating rod is fixedly connected to the lower end of the output shaft of the motor. A driving bevel gear is fixedly connected to the outer side of the lower end of the rotating rod. A mesh frame is fixedly connected to the left end of the round shaft. A booster pump is provided at the right end of the electrolytic cell. An air inlet pipe is installed at the outer end of the booster pump. Drying units are installed at both the upper and lower ends of the top plate.

[0009] Furthermore, the air drying unit includes an air pump installed on the upper left side of the top plate. A rubber hose is installed at the outlet end of the air pump. A fixing pipe is fixedly connected to the left end of the cover plate. A connecting pipe is fixedly connected to the lower end of the fixing pipe. An exhaust pipe is fixedly connected to the lower end of the connecting pipe at equal intervals.

[0010] Furthermore, limiting holes are provided at the four corners inside the cover plate, and the outer side of the support rod is slidably connected to the inner side of the limiting hole.

[0011] Furthermore, the lower end of the connecting plate is provided with a rotating hole, the outer side of the left end of the circular shaft is rotatably connected to the inner side of the rotating hole, the outer side of the circular shaft is connected with a limiting ring, and the adjacent side of the two limiting rings is slidably connected to the left and right sides of the lower end of the connecting plate.

[0012] Furthermore, the driven bevel gear meshes with the driving bevel gear, the left side of the mesh frame is slidably connected to the inner left end of the electrolytic cell, and the opening of the mesh frame faces to the left.

[0013] Furthermore, the end of the air intake pipe furthest from the booster pump is fixed to the upper right end of the electrolytic cell.

[0014] Furthermore, the lower end of the rubber hose is fixedly connected to the upper end of the fixed tube.

[0015] (3) Beneficial effects

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] In this invention, when the mesh frame moves down into the electrolytic cell, immersing the capacitors inside the frame in the electrolyte, the rotating rod is driven to rotate intermittently by a motor. Through the transmission of the driven and driven bevel gears, the circular shaft and the mesh frame rotate. This causes the capacitors piled in the mesh frame to be flipped along with the frame's rotation, resulting in the capacitors changing their position within the mesh frame at regular intervals. This ensures that all capacitors in the packaging mesh frame are fully in contact with the electrolyte, allowing them to be uniformly immersed in the electrolyte within the electrolytic cell.

[0018] In this invention, after the capacitor in the mesh frame is impregnated, the cover plate is lifted, and air is drawn into the rubber hose by starting the air pump. The air then flows through the fixing pipe and the connecting pipe and finally blows straight out of the lower end of the exhaust pipe into the mesh frame. This can blow off the excess electrolyte adhering to the surface of the capacitor in the mesh frame and make the surface of the capacitor dry faster, thus achieving the effect of rapid air drying of the capacitor surface. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the main body of this utility model;

[0022] Figure 3 This is a schematic diagram of the connection between the connecting plate and the round shaft of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure at both ends of the cover plate of this utility model.

[0024] The labels in the attached diagram are as follows: 1. Electrolytic cell; 2. Support rod; 3. Top plate; 401. Hydraulic cylinder; 402. Cover plate; 403. Connecting plate; 404. Round shaft; 405. Limiting ring; 406. Driven bevel gear; 407. Motor; 408. Rotating rod; 409. Driving bevel gear; 410. Frame; 411. Booster pump; 412. Inlet pipe; 501. Air pump; 502. Rubber hose; 503. Fixing pipe; 504. Connecting pipe; 505. Exhaust pipe. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] This specific embodiment is a pressure-impregnating device for aluminum electrolytic capacitors, and its structural schematic diagram is shown below. Figures 1 to 3 As shown, the system includes an electrolytic cell 1. Support rods 2 are fixedly connected to the four upper corners of the electrolytic cell 1. A top plate 3 is fixedly connected to the upper end of the support rods 2. Impregnation mechanisms are provided at both the inner and outer ends of the electrolytic cell 1. Each impregnation mechanism includes a hydraulic cylinder 401 installed at the middle position on the upper side of the top plate 3. A cover plate 402 is fixedly connected to the lower end of the output shaft of the hydraulic cylinder 401. Limiting holes are formed at the four corners inside the cover plate 402. The outer side of the support rods 2 is slidably connected to the inner side of the limiting holes. A connecting plate 403 is fixedly connected to the right end of the lower side of the cover plate 402. A circular shaft 404 is connected to the lower end of the connecting plate 403. A limit ring 405 is fixedly connected to the left outer side of the circular shaft 404. A rotating hole is provided at the lower end of the connecting plate 403. The outer side of the left end of the circular shaft 404 is rotatably connected to the inner side of the rotating hole. A limit ring 405 is connected to the outer side of the circular shaft 404, and the adjacent side of the two limit rings 405 is slidably connected to the left and right sides of the lower end of the connecting plate 403. A driven bevel gear 406 is fixedly connected to the outer side of the right end of the circular shaft 404. A motor 407 is installed at the lower right end of the cover plate 402. A rotating rod 408 is fixedly connected to the lower end of the output shaft of 7. A driving bevel gear 409 is fixedly connected to the outer side of the lower end of the rotating rod 408. A mesh frame 410 is fixedly connected to the left end of the round shaft 404. A driven bevel gear 406 meshes with the driving bevel gear 409. The left side of the mesh frame 410 is slidably connected to the inner left end of the electrolytic cell 1. The opening of the mesh frame 410 faces to the left. When the mesh frame 410 moves down into the electrolytic cell 1, so that the capacitor inside the mesh frame 410 is immersed in the electrolyte in the electrolytic cell 1, the motor 4 is started intermittently. 07 drives the rotating rod 408 to rotate, and through the transmission of the driven bevel gear 406 and the driving bevel gear 409, the round shaft 404 and the mesh frame 410 rotate. This causes the capacitors piled in the mesh frame 410 to be flipped along with the rotation of the mesh frame 410, so that the capacitors in the mesh frame 410 will change their position in the mesh frame 410 at regular intervals. The capacitors in the packaging mesh frame 410 can fully contact the electrolyte, so that the capacitors in the packaging mesh frame 410 can be uniformly immersed in the electrolyte in the electrolytic cell 1.

[0027] The electrolytic cell 1 is equipped with a booster pump 411 at its right end. An air inlet pipe 412 is installed at the outer end of the booster pump 411. The end of the air inlet pipe 412 away from the booster pump 411 is fixed to the upper right end of the electrolytic cell 1. When the capacitor in the mesh frame 410 is immersed in the electrolyte in the electrolytic cell 1, the booster pump 411 is started to pressurize the electrolytic cell 1 through the air inlet pipe 412. This allows the electrolyte to be more evenly distributed inside the aluminum electrolytic capacitor, avoiding insufficient local immersion. This improves the quality and reliability of the product and reduces the performance differences of the capacitor caused by uneven immersion.

[0028] Cooperate Figure 4 A drying unit is installed at both the upper and lower ends of the top plate 3. The drying unit includes an air pump 501 installed on the upper left side of the top plate 3. A rubber hose 502 is installed at the outlet end of the air pump 501. A fixing pipe 503 is fixedly connected to the left end of the cover plate 402. A connecting pipe 504 is fixedly connected to the lower end of the fixing pipe 503. An exhaust pipe 505 is fixedly connected to the lower end of the connecting pipe 504 at equal intervals. The lower end of the rubber hose 502 is fixedly connected to the upper end of the fixing pipe 503. After the capacitor in the mesh frame 410 is impregnated, the cover plate 402 is lifted. The air pump 501 is started to draw air into the rubber hose 502, and then the air flows through the fixing pipe 503 and the connecting pipe 504 before finally blowing it straight into the mesh frame 410 from the lower end of the exhaust pipe 505. This can blow off the excess electrolyte adhering to the surface of the capacitor in the mesh frame 410 and make the surface of the capacitor dry faster, thus achieving the effect of rapid drying of the capacitor surface.

[0029] Working principle: When impregnating the capacitor, the capacitor to be impregnated is first placed in the mesh frame 410. Then, the hydraulic cylinder 401 is activated, and its output shaft extends to move the cover plate 402 downwards until the cover plate 402 moves to the upper side of the electrolytic cell 1. The mesh frame 410 then moves into the electrolyte inside the electrolytic cell 1 to impregnate the capacitor. Subsequently, the booster pump 411 is activated to pressurize the electrolytic cell 1 through the air inlet pipe 412, so that the capacitor is impregnated under high pressure. During the impregnation process, the motor 407 is intermittently activated to drive the mesh frame 410 to rotate, thus impregnating the capacitor inside the mesh frame 410. The capacitors are flipped so that each capacitor in the mesh frame 410 is evenly impregnated. Finally, after the capacitors in the mesh frame 410 are impregnated, the hydraulic cylinder 401 is reopened to lift the cover plate 402. At the same time, the mesh frame 410 is also moved out of the electrolytic cell 1. Then, the air pump 501 is started to draw air into the rubber hose 502, and then through the fixed pipe 503 and the connecting pipe 504, and finally blown straight into the mesh frame 410 from the lower end of the exhaust pipe 505 to quickly air dry the surface of the capacitors in the mesh frame 410. After air drying, the capacitors are taken out, and the impregnation of the capacitors is completed.

[0030] All technical features in this embodiment can be freely combined according to actual needs.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pressure-impregnating apparatus for aluminum electrolytic capacitors, comprising an electrolytic cell (1), characterized in that, Support rods (2) are fixedly connected to the four upper corners of the electrolytic cell (1). A top plate (3) is fixedly connected to the upper end of the support rods (2). Impregnation mechanisms are provided at both the inner and outer ends of the electrolytic cell (1). The impregnation mechanism includes a hydraulic cylinder (401) installed at the middle position on the upper side of the top plate (3). A cover plate (402) is fixedly connected to the lower end of the output shaft of the hydraulic cylinder (401). A connecting plate (403) is fixedly connected to the right end of the lower side of the cover plate (402). A round shaft (404) is connected to the lower end of the connecting plate (403). A limit ring (405) is fixedly connected to the left end of the outer side of the round shaft (404). A driven bevel gear (406) is fixedly connected to the outer side of the right end of the round shaft (404). A motor (407) is installed on the lower right end of the cover plate (402). A rotating rod (408) is fixedly connected to the lower end of the output shaft of the motor (407). A driving bevel gear (409) is fixedly connected to the outer side of the lower end of the rotating rod (408). A mesh frame (410) is fixedly connected to the left end of the round shaft (404). A booster pump (411) is provided at the right end of the electrolytic cell (1). An air inlet pipe (412) is installed at the outer end of the booster pump (411). A drying unit is installed at the upper and lower ends of the top plate (3).

2. The aluminum electrolytic capacitor pressurization and impregnation device according to claim 1, characterized in that, The air drying unit includes an air pump (501) installed on the upper left side of the top plate (3). A rubber hose (502) is installed at the outlet end of the air pump (501). A fixing pipe (503) is fixedly connected to the left end of the cover plate (402). A connecting pipe (504) is fixedly connected to the lower end of the fixing pipe (503). An exhaust pipe (505) is fixedly connected to the lower end of the connecting pipe (504) at equal intervals.

3. The aluminum electrolytic capacitor pressurization and impregnation device according to claim 1, characterized in that, Limiting holes are provided at the four corners inside the cover plate (402), and the outer side of the support rod (2) is slidably connected to the inner side of the limiting hole.

4. The aluminum electrolytic capacitor pressurization and impregnation device according to claim 1, characterized in that, The lower end of the connecting plate (403) is provided with a rotating hole. The outer side of the left end of the circular shaft (404) is rotatably connected to the inner side of the rotating hole. The outer side of the circular shaft (404) is connected with a limiting ring (405), and the two limiting rings (405) are slidably connected to the left and right sides of the lower end of the connecting plate (403) on one side.

5. The pressure-applying impregnation device for an aluminum electrolytic capacitor according to claim 1, characterized in that, The driven bevel gear (406) meshes with the driving bevel gear (409), the left side of the mesh frame (410) is slidably connected to the inner left end of the electrolytic cell (1), and the opening of the mesh frame (410) faces to the left.

6. The aluminum electrolytic capacitor pressure impregnation device according to claim 1, characterized in that, The end of the air inlet pipe (412) away from the booster pump (411) is fixed to the upper right end of the electrolytic cell (1).

7. The aluminum electrolytic capacitor pressure impregnation device according to claim 2, characterized in that, The lower end of the rubber hose (502) is fixedly connected to the upper end of the fixed tube (503).

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