A capacitor bushing withstand voltage test device

Abstract

The present application relates to a capacitor casing withstand voltage test device, belonging to the technical field of capacitors, including a base and a column arranged on the base, a pressure plate is slidably arranged on the column, and a tin foil layer is wrapped on the pressure plate; a mounting seat is arranged on the base, a mounting hole for mounting a capacitor is opened on the mounting seat, a tin foil tube is arranged in the mounting hole, adjacent tin foil tubes on the mounting seat are electrically connected in series and electrically connected to a voltage tester, the mounting holes are evenly arranged along the length direction and circumference of the mounting seat, and a first driving member for driving the mounting seat to rotate is arranged on the base; a raw material box for placing capacitors is arranged on the base, and a plurality of feeding tubes are arranged on the raw material box, the feeding tubes are directly opposite to the mounting holes on the side of the mounting seat, the feeding tubes are parallel to the base, and a second driving member for driving the capacitor in the raw material box through the feeding tube to the mounting hole is also arranged on the raw material box. The present application has the effect of improving the efficiency of capacitor testing.

Description

Technical Field

[0001] The present application relates to the technical field of capacitors, and in particular to a capacitor bushing withstand voltage test device. Background Art

[0002] During the production of capacitors, it is necessary to measure the voltage of the capacitor bushing. This is to ensure the electrical performance and safety of the capacitor. The main purpose of measuring voltage is to detect whether the bushing insulation is good and whether there are potential defects or faults inside the capacitor. In the production process of capacitors, the bushing is an important component of the capacitor, and its insulation performance is directly related to the overall performance of the capacitor. If the bushing has problems such as poor insulation, it will cause the capacitor to malfunction during normal operation and even cause safety accidents. Therefore, in the quality control link of capacitor production, measuring the voltage of the bushing is an indispensable test.

[0003] At present, a patent document with authorization announcement number CN217212989U discloses a capacitor bushing withstand voltage test device, including a base, a pair of guide columns and columns are arranged on the base, the same fixed clamp and movable clamp are arranged on the guide column, the movable clamp is driven by a cylinder, multiple arc holes are opened between the fixed clamp and the movable clamp, and the two arc holes can be assembled into a circular hole, a capacitor wrapped with a tin foil tube is placed in the circular hole, the tin foil tubes are electrically connected in series, and then electrically connected to a voltage tester, a downward pressure cylinder is arranged on the column, a pressure plate is arranged at the end of the piston rod of the downward pressure cylinder, a tin foil layer is wrapped on the pressure plate, and the tin foil layer is also electrically connected to the voltage tester. By arranging the fixed clamp and the movable clamp, multiple capacitor bushings can be pressure-measured simultaneously, thereby improving the pressure measurement efficiency and work efficiency.

[0004] However, during the capacitor testing process, the installation and disassembly of the capacitor takes a lot of time, resulting in low efficiency of the capacitor withstand voltage test. Summary of the invention

[0005] In order to improve the testing efficiency of capacitors, the present application provides a capacitor bushing withstand voltage testing device.

[0006] The present application provides a capacitor bushing withstand voltage test device that adopts the following technical solution:

[0007] A capacitor bushing withstand voltage test device comprises a base and a column arranged on the base, a pressure plate is slidably arranged on the column, and a tin foil layer is wrapped on the pressure plate; a mounting seat is arranged on the base, the mounting seat is cylindrical and the length direction is parallel to the length direction of the pressure plate, a mounting hole for mounting a capacitor is opened on the mounting seat, a tin foil tube is arranged in the mounting hole, the capacitor is located in the tin foil tube and is tightly fitted with the tin foil tube on the peripheral wall, the adjacent tin foil tubes on the mounting seat are electrically connected in series and electrically connected to a voltage tester, and the pressure plate is arranged on the base. After the tin foil layer on the mounting base is crimped onto the capacitor pin, it is connected to the voltage tester through the tin foil tube to form a series circuit, the mounting holes are evenly arranged along the length direction and the circumference of the mounting base, and the base is provided with a first driving member for driving the mounting base to rotate; the base is provided with a raw material box for placing the capacitor, and the raw material box is provided with a plurality of feeding pipes, the feeding pipes are directly opposite to the mounting holes on the side of the mounting base, the feeding pipes are parallel to the base, and the raw material box is also provided with a second driving member for driving the capacitor in the raw material box through the feeding pipe to the mounting hole.

[0008] Optionally, a mounting frame is provided on the base, the mounting seat is provided on the mounting frame, the first driving member includes a motor, a worm gear and a worm, a connecting shaft is provided at the end of the mounting seat, the connecting shaft is rotatably provided on the mounting frame, the worm gear is coaxially provided on the connecting shaft, the motor is fixedly provided on the mounting frame, and the worm gear and worm wheel are meshed with each other and provided on the output shaft of the motor.

[0009] Optionally, a transition pipe is arranged between the raw material box and the feeding pipe, the cross-section of the transition pipe is rectangular and parallel to the feeding pipe, the capacitor in the raw material box is transported to the feeding pipe through the transition pipe, the raw material box is located above the feeding pipe, and the transition pipe is located at the bottom of the raw material box; the second driving member includes a first air pump arranged on the base, the output end of the first air pump is provided with a first air pipe, the first air pipe enters the feeding pipe and faces the tail of the capacitor.

[0010] Optionally, a separation tube is slidably arranged inside the feeding tube, the separation tube is located at the tail of the capacitor, the separation tube slides along the length direction of the feeding tube, the first air pipe is connected to the separation tube, and the feeding tube is provided with a third driving member for driving the separation tube to slide against the tail of the capacitor and drive the capacitor to separate from the upper capacitor.

[0011] Optionally, a second air pump is disposed in the mounting base, a second air pipe is disposed on the second air pump, and an air outlet of the second air pipe faces the capacitor.

[0012] Optionally, a receiving plate is slidably arranged in the mounting hole, the width of the receiving plate is smaller than the inner diameter of the tin foil tube, the receiving plate slides along the depth direction of the mounting hole, and an elastic member for driving the receiving plate to slide is arranged in the mounting hole.

[0013] Optionally, a push switch is provided at the end of the mounting seat, and the push switch is electrically connected to the second air pump. When the mounting seat drives the tested capacitor to run to the bottom, the push switch is pressed between the mounting frame and the mounting seat and starts the second air pump.

[0014] Optionally, the elastic member includes a spring arranged in the mounting hole, one end of the spring is fixedly arranged on the bottom wall of the mounting hole, and the other end of the spring is fixedly arranged on the receiving plate.

[0015] Optionally, a telescopic rod is provided in the mounting hole, the telescopic rod is located in the spring, two ends of the telescopic rod are respectively fixed on the bottom wall of the mounting hole and the receiving plate, and the second air pipe is connected to the sleeve of the telescopic rod.

[0016] Optionally, a slip ring is fixedly provided at the end of the mounting seat, the tin foil tubes connected in series laterally in the mounting seat are electrically connected to the slip ring, a contact piece is fixedly provided on the base, the contact piece is slidably provided on the slip ring, and the contact piece is electrically connected to the voltage tester.

[0017] In summary, the present application includes at least one of the following beneficial technical effects:

[0018] 1. When performing a withstand voltage test on the capacitor sleeve, the capacitor is placed in the raw material box, the capacitor in the raw material box enters the feeding tube, and the capacitor is driven to move by the second driving member, the capacitor enters the mounting hole, the capacitor entering the mounting hole enters the tin foil tube, and then the mounting seat is driven to rotate by the first driving member, the mounting seat rotates and drives the capacitor to rotate toward the pressing plate, and rotates to the bottom of the pressing plate, and then the pressing plate slides toward the mounting seat, and the tin foil layer on the pressing plate is crimped onto the pin of the capacitor. At this time, the tin foil tube, the tin foil layer and the voltage tester are connected in series as a loop, and the capacitor is subjected to a withstand voltage test; after the withstand voltage test of the capacitor is completed, the mounting seat rotates and drives the tested capacitor to rotate toward the base, and falls on the base, and the above steps are repeated to perform a withstand voltage test on the capacitor. In the above process, the installation and disassembly of the capacitor saves a lot of time, thereby improving the efficiency of the withstand voltage test of the capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of a capacitor bushing withstand voltage test device according to an embodiment of the present application;

[0020] Figure 2 This is a back view of a capacitor bushing withstand voltage test device according to an embodiment of the present application;

[0021] Figure 3 It is a cross-sectional view of a feed pipe in a capacitor bushing withstand voltage test device according to an embodiment of the present application;

[0022] Figure 4 yes Figure 3 A magnified schematic diagram of part A;

[0023] Figure 5 is a cross-sectional view of a mounting seat in a capacitor bushing withstand voltage test device according to an embodiment of the present application;

[0024] Figure 6 yes Figure 5 Schematic diagram of the enlarged portion B.

[0025] Explanation of the reference numerals in the accompanying drawings: 1. base; 2. column; 3. pressure plate; 4. tin foil layer; 5. mounting seat; 6. mounting hole; 7. tin foil tube; 8. guide surface; 9. voltage tester; 10. raw material box; 11. feeding pipe; 12. mounting frame; 13. motor; 14. worm gear; 15. worm; 16. transition pipe; 17. first air pump; 18. first air pipe; 19. separation pipe; 20. electric push rod; 21. second air pump; 22. second air pipe; 23. push switch; 24. push block; 25. receiving plate; 26. spring; 27. telescopic rod; 28. slip ring; 29. ​​contact piece. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-6 This application is described in further detail.

[0027] The present application embodiment discloses a capacitor bushing withstand voltage test device. Figure 1 The capacitor bushing withstand voltage test device comprises a base 1 and a column 2 arranged on the base 1, the column 2 is perpendicular to the base 1, a pressing plate 3 is slidably arranged on the column 2, further, a hydraulic cylinder for driving the pressing plate 3 to slide is arranged on the column 2, the pressing plate 3 is fixedly arranged on the piston rod of the hydraulic cylinder, and a tin foil layer 4 is wrapped on the pressing plate 3;

[0028] Reference Figure 1 and Figure 2A mounting seat 5 is provided on the base 1. The mounting seat 5 is located below the pressing plate 3. The mounting seat 5 is cylindrical and its length direction is parallel to the length direction of the pressing plate 3. The mounting seat 5 is provided with a mounting hole 6 for mounting a capacitor. There are multiple mounting holes 6. The multiple mounting holes 6 are evenly arranged along the length direction and circumferential direction of the mounting seat 5. Four mounting holes 6 are provided in the circumference of the mounting seat 5, and the angle between adjacent mounting holes 6 is 90°. A tin foil tube 7 is provided in the mounting hole 6. The port of the tin foil tube 7 for the capacitor to enter is provided with a guide surface. 8, the guide surface 8 is inclined toward the bottom wall of the tin foil tube 7, the capacitor is located in the tin foil tube 7 and is tightly fitted with the peripheral wall tin foil tube 7, the adjacent tin foil tubes 7 on the mounting seat 5 are electrically connected in series and electrically connected to the voltage tester 9, the tin foil layer 4 is electrically connected to the voltage tester 9, the tin foil layer 4 on the pressing plate 3 is crimped onto the capacitor pin, and then connected to the voltage tester 9 through the tin foil tube 7 to form a series circuit, the mounting holes 6 are evenly arranged along the length direction and circumference of the mounting seat 5, and the base 1 is provided with a first driving member for driving the mounting seat 5 to rotate;

[0029] Reference Figure 2 and Figure 3 A raw material box 10 for placing capacitors is provided on the base 1. A plurality of feeding pipes 11 are provided on the raw material box 10. The feeding pipes 11 are directly opposite to the mounting holes 6 on the side of the mounting seat 5. The feeding pipes 11 are parallel to the base 1. A second driving member for driving the capacitors in the raw material box 10 through the feeding pipes 11 to the mounting holes 6 is also provided on the raw material box 10.

[0030] When the capacitor sleeve is subjected to a withstand voltage test, the capacitor is placed in the raw material box 10, the capacitor in the raw material box 10 enters the feeding tube 11, and the capacitor is driven to move by the second driving member, and the capacitor enters the mounting hole 6, and the capacitor entering the mounting hole 6 enters the tin foil tube 7, and then the mounting seat 5 is driven to rotate by the first driving member, and the mounting seat 5 rotates to drive the capacitor to rotate toward the pressing plate 3, and rotates to the bottom of the pressing plate 3, and then the pressing plate 3 slides toward the mounting seat 5, and the tin foil layer 4 on the pressing plate 3 is crimped onto the pin of the capacitor. At this time, the tin foil tube 7, the tin foil layer 4 and the voltage tester 9 are connected in series as a loop, and the capacitor is subjected to a withstand voltage test; after the capacitor withstand voltage test is completed, the mounting seat 5 rotates to drive the tested capacitor to rotate toward the base 1, and falls on the base 1, and the above steps are repeated to test the capacitor withstand voltage. In the above process, the installation and disassembly of the capacitor saves a lot of time, thereby improving the efficiency of the capacitor withstand voltage test.

[0031] Reference Figure 3In the embodiment of the present application, a mounting frame 12 is provided on the base 1, and the mounting seat 5 is provided on the mounting frame 12. The first driving member includes a motor 13, a worm gear 14 and a worm 15. A connecting shaft is provided at the end of the mounting seat 5. The connecting shaft is coaxial with the mounting seat 5, and the connecting shaft is rotatably provided on the mounting frame 12. The worm gear 14 is coaxially provided on the connecting shaft. The motor 13 is fixedly provided on the mounting frame 12, and the worm 15 and the worm gear 14 are meshed with each other and are provided on the output shaft of the motor 13. Start the motor 13, the motor 13 drives the worm 15 to rotate, the rotation of the worm 15 drives the worm gear 14 to rotate, the rotation of the worm gear 14 drives the connecting shaft to rotate, and the rotation of the connecting shaft drives the mounting seat 5 to rotate. The operation is simple and convenient; at the same time, it is convenient to fix the mounting seat 5.

[0032] Reference Figure 3 and Figure 4 In the embodiment of the present application, a transition pipe 16 is provided between the raw material box 10 and the feeding pipe 11. The cross section of the transition pipe 16 is rectangular and parallel to the feeding pipe 11. The capacitors in the raw material box 10 are transported to the feeding pipe 11 through the transition pipe 16. The raw material box 10 is located above the feeding pipe 11, and the transition pipe 16 is located at the bottom of the raw material box 10. The capacitors in the raw material box 10 enter the feeding pipe 11 through the transition pipe 16. The capacitors are arranged in the transition pipe 16 and connected to each other. Furthermore, the diameter of the capacitors is equal to the diameter of the feeding pipe 11.

[0033] Reference Figure 3 and Figure 4 The second driving member includes a first air pump 17 arranged on the base 1, and a first air pipe 18 is arranged at the output end of the first air pump 17. The first air pipe 18 enters the feeding pipe 11 and faces the tail of the capacitor, enters the capacitor in the feeding pipe 11, and starts the first air pump 17. The first air pump 17 compresses the air and acts on the tail of the capacitor, pushing the capacitor toward the mounting hole 6 and entering the mounting hole 6.

[0034] Reference Figure 3 and Figure 4 Because the capacitor above the feeding tube 11 is pressed against the top of the capacitor in the feeding tube 11, the resistance of the capacitor in the feeding tube 11 is relatively large, making it difficult for the capacitor to move. Therefore, in the embodiment of the present application, a separation tube 19 is slidably arranged in the feeding tube 11. The separation tube 19 is located at the tail of the capacitor. The separation tube 19 slides along the length direction of the feeding tube 11. The first air pipe 18 is connected to the separation tube 19. A third driving member is provided on the feeding tube 11 for driving the separation tube 19 to slide against the tail of the capacitor and drive the capacitor to separate from the upper capacitor. The third driving member includes an electric push rod 20 arranged at the tail of the feeding tube 11. The output shaft of the electric push rod 20 is located in the feeding tube 11, and the separation tube 19 is coaxially arranged on the output shaft of the electric push rod 20.

[0035] The electric push rod 20 is started, and the electric push rod 20 drives the separation tube 19 to move. The separation tube 19 acts on the tail of the capacitor and is separated from the upper capacitor. Then the first air pump 17 is started to drive the capacitor to slide into the installation hole 6.

[0036] Reference Figure 5 and Figure 6 Because the capacitor is in close contact with the tin foil tube 7, when the mounting seat 5 drives the capacitor to run to the bottom, it is difficult for the capacitor to fall from the mounting hole 6. Therefore, in the embodiment of the present application, a second air pump 21 is provided in the mounting seat 5, and the number of the second air pumps 21 is consistent with the number of mounting holes 6 on the mounting seat 5. The second air pump 21 is provided with a second air pipe 22, and the air outlet of the second air pipe 22 is directly facing the capacitor; when the capacitor runs to the bottom, the second air pump 21 is started, the second air pump 21 compresses the air and acts on the capacitor, thereby driving the capacitor to move out of the mounting hole 6.

[0037] Reference Figure 5 and Figure 6 To facilitate the start and stop of the second air pump 21, a push switch 23 is provided at the end of the mounting base 5, and the push switch 23 is electrically connected to the second air pump 21. Furthermore, a push block 24 is provided on the mounting frame 12 and at the position of the push switch 23 corresponding to the second air pump 21 corresponding to the lowest mounting hole 6. When the mounting base 5 drives the tested capacitor to run to the lowest position, the push switch 23 is pressed on the push block 24 to start the second air pump 21. After the push switch 23 is separated from the push block 24, the second air pump 21 stops, and the operation is simple and convenient. At the same time, the starting time of the second air pump 21 is affected by the capacitor test time. During this time, the dust and impurities in the tin foil tube 7 are cleared, which facilitates the testing of the capacitor.

[0038] Reference Figure 5 and Figure 6 Under the driving action of the first air pump 17, the capacitor has a certain initial velocity, which may easily cause a large collision between the capacitor and the bottom wall of the mounting hole 6, and may easily cause damage to the capacitor. Therefore, in the embodiment of the present application, a receiving plate 25 is slidably arranged in the mounting hole 6, and the width of the receiving plate 25 is smaller than the inner diameter of the tin foil tube 7. The receiving plate 25 slides along the depth direction of the mounting hole 6. An elastic member for driving the receiving plate 25 to slide is arranged in the mounting hole 6. The elastic member includes a spring 26 arranged in the mounting hole 6, one end of the spring 26 is fixedly arranged on the bottom wall of the mounting hole 6, and the other end is fixedly arranged on the receiving plate 25; after the capacitor enters the mounting hole 6, the capacitor is received on the receiving plate 25 and the spring 26 is compressed. During the compression of the spring 26, the speed of the capacitor is slowed down, thereby reducing the possibility of damage to the capacitor.

[0039] Reference Figure 5 and Figure 6Furthermore, a telescopic rod 27 is provided in the mounting hole 6, and the telescopic rod 27 is located in the spring 26. The two ends of the telescopic rod 27 are respectively fixed on the bottom wall of the mounting hole 6 and the receiving plate 25, and the second air pipe 22 is connected with the sleeve of the telescopic rod 27; under the action of the telescopic rod 27, the spring 26 is limited and the receiving plate 25 is guided for sliding, thereby facilitating the capacitor to enter the mounting hole 6; at the same time, after the second air pump 21 is started, the compressed air of the second air pump 21 enters the sleeve and acts on the sliding rod, thereby pushing the receiving plate 25 to slide, and then moving the capacitor out.

[0040] Reference Figure 5 In order to facilitate the electrical connection between the tin foil tube 7 and the voltage tester 9, a slip ring 28 is fixedly provided at the end of the mounting seat 5, and the tin foil tube 7 which is horizontally connected in series in the mounting seat 5 is electrically connected to the slip ring 28. A contact piece 29 is fixedly provided on the base 1. Furthermore, the contact piece 29 is located on the mounting frame 12, and the contact piece 29 is slidably provided on the slip ring 28, and the contact piece 29 is electrically connected to the voltage tester 9; under the action of the slip ring 28 and the contact piece 29, the tin foil tube 7 is electrically connected to the voltage tester 9 during the rotation of the mounting seat 5.

[0041] The implementation principle of a capacitor bushing withstand voltage test device in the embodiment of the present application is as follows:

[0042] When the capacitor sleeve is subjected to a withstand voltage test, the capacitor is placed in the raw material box 10, the capacitor in the raw material box 10 enters the feeding tube 11, and the capacitor is driven to move by the first air pump 17, and the capacitor enters the mounting hole 6, and the capacitor entering the mounting hole 6 enters the tin foil tube 7, and then the motor 13 drives the mounting seat 5 to rotate, and the mounting seat 5 rotates to drive the capacitor to rotate toward the pressing plate 3, and rotates to the bottom of the pressing plate 3, and then the pressing plate 3 slides toward the mounting seat 5, and the tin foil layer 4 on the pressing plate 3 is crimped onto the pin of the capacitor. At this time, the tin foil tube 7, the tin foil layer 4 and the voltage tester 9 are connected in series as a loop, and the capacitor is subjected to a withstand voltage test; after the capacitor withstand voltage test is completed, the mounting seat 5 rotates to drive the tested capacitor to rotate toward the base 1, and falls on the base 1, and the above steps are repeated to test the capacitor withstand voltage. In the above process, the installation and disassembly of the capacitor saves a lot of time, thereby improving the efficiency of the capacitor withstand voltage test.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A capacitor bushing withstand voltage test device, characterized in that: The invention comprises a base (1) and a column (2) arranged on the base (1), a pressure plate (3) being slidably arranged on the column (2), and a tin foil layer (4) being wrapped on the pressure plate (3); a mounting seat (5) being arranged on the base (1), the mounting seat (5) being cylindrical and having a length direction parallel to the length direction of the pressure plate (3), a mounting hole (6) for mounting a capacitor being opened on the mounting seat (5), a tin foil tube (7) being arranged in the mounting hole (6), the capacitor being located in the tin foil tube (7) and being tightly fitted with the tin foil tube (7) on the peripheral wall, and the tin foil tubes (7) being electrically connected in series and adjacent to each other in the horizontal direction on the mounting seat (5). The voltage tester (9) is electrically connected. After the tin foil layer (4) on the pressing plate (3) is crimped onto the capacitor pin, it is connected to the voltage tester (9) through the tin foil tube (7) to form a series circuit. The mounting holes (6) are evenly arranged along the length direction and circumference of the mounting seat (5). The base (1) is provided with a first driving member for driving the mounting seat (5) to rotate. The base (1) is provided with a raw material box (10) for placing the capacitor. The raw material box (10) is provided with a plurality of feeding pipes (11). The feeding pipes (11) are directly opposite to the mounting holes (6) on the side of the mounting seat (5). The feeding pipes (11) are parallel to the mounting holes (6) on the side of the mounting seat (5). The base (1) is provided with a second driving member on the raw material box (10) for driving the capacitor in the raw material box (10) to pass through the feeding pipe (11) to the mounting hole (6); a transition pipe (16) is provided between the raw material box (10) and the feeding pipe (11); the cross section of the transition pipe (16) is rectangular and parallel to the feeding pipe (11); the capacitor in the raw material box (10) is transported to the feeding pipe (11) through the transition pipe (16); the raw material box (10) is located above the feeding pipe (11), and the transition pipe (16) is located at the bottom of the raw material box (10); the second driving member includes a (1), the output end of the first air pump (17) is provided with a first air pipe (18), the first air pipe (18) enters the feeding pipe (11) and faces the tail of the capacitor; a separation pipe (19) is slidably provided in the feeding pipe (11), the separation pipe (19) is located at the tail of the capacitor, the separation pipe (19) slides along the length direction of the feeding pipe (11), the first air pipe (18) is connected with the separation pipe (19), and the feeding pipe (11) is provided with a third driving member for driving the separation pipe (19) to slide against the tail of the capacitor and drive the capacitor to separate from the upper capacitor.

2. A capacitor bushing withstand voltage test device according to claim 1, characterized in that: The base (1) is provided with a mounting frame (12), the mounting seat (5) is arranged on the mounting frame (12), the first driving member comprises a motor (13), a worm wheel (14) and a worm (15), a connecting shaft is arranged at the end of the mounting seat (5), the connecting shaft is rotatably arranged on the mounting frame (12), the worm wheel (14) is coaxially arranged on the connecting shaft, the motor (13) is fixedly arranged on the mounting frame (12), and the worm (15) and the worm wheel (14) are meshed with each other and arranged on the output shaft of the motor (13).

3. A capacitor bushing withstand voltage test device according to claim 2, characterized in that: A second air pump (21) is arranged in the mounting seat (5), a second air pipe (22) is arranged on the second air pump (21), and an air outlet of the second air pipe (22) faces the capacitor.

4. A capacitor bushing withstand voltage test device according to claim 3, characterized in that: A receiving plate (25) is slidably arranged in the mounting hole (6); the width of the receiving plate (25) is smaller than the inner diameter of the tin foil tube (7); the receiving plate (25) slides along the depth direction of the mounting hole (6); and an elastic member for driving the receiving plate (25) to slide is arranged in the mounting hole (6).

5. A capacitor bushing withstand voltage test device according to claim 3, characterized in that: A push switch (23) is provided at the end of the mounting seat (5), and the push switch (23) is electrically connected to the second air pump (21). When the mounting seat (5) drives the tested capacitor to run to the bottom, the push switch (23) is pressed between the mounting frame (12) and the mounting seat (5) and the second air pump (21) is started.

6. A capacitor bushing withstand voltage test device according to claim 4, characterized in that: The elastic member comprises a spring (26) arranged in the mounting hole (6); one end of the spring (26) is fixedly arranged on the bottom wall of the mounting hole (6), and the other end is fixedly arranged on the receiving plate (25).

7. A capacitor bushing withstand voltage test device according to claim 6, characterized in that: A telescopic rod (27) is arranged in the mounting hole (6), the telescopic rod (27) is located in the spring (26), two ends of the telescopic rod (27) are respectively fixedly arranged on the bottom wall of the mounting hole (6) and the receiving plate (25), and the second air pipe (22) is connected to the sleeve of the telescopic rod (27).

8. A capacitor bushing withstand voltage test device according to claim 1, characterized in that: A slip ring (28) is fixedly arranged at the end of the mounting seat (5), and the tin foil tubes (7) connected in series transversely in the mounting seat (5) are electrically connected to the slip ring (28). A contact piece (29) is fixedly arranged on the base (1), and the contact piece (29) is slidably arranged on the slip ring (28), and the contact piece (29) is electrically connected to the voltage tester (9).

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