A flexible HVDC capacitor bushing device
By using a combination of air channels and heating tubes in the flexible straight capacitor bushing equipment, a high vacuum environment is created and slowly heated along the axial direction, which solves the problem of bubbling in heat shrink tubing and improves the uniformity and safety of the tubing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SICHUAN PROVINCE SCI CITY JIUXIN SCI & TECH
- Filing Date
- 2026-04-30
- Publication Date
- 2026-05-29
AI Technical Summary
In existing methods for heat-shrinking capacitor sleeves, bubbling is prone to occur during the heating process, which affects the appearance and increases the risk of partial discharge.
A flexible straight capacitor sleeve device is adopted. By setting up an air channel and a first air tube to form a high vacuum environment, combined with the heating tube slowly heating along the axis, the air between the heat shrink tubing and the capacitor is reduced, which avoids uneven heating and reduces bubbling.
It effectively reduces air between the heat shrink tubing and the capacitor, reduces bubbling, and improves the uniformity and safety of the tubing.
Smart Images
Figure CN122117666A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of flexible DC capacitor processing, and more particularly to flexible DC capacitor packaging technology, specifically to a flexible DC capacitor bushing device. Background Technology
[0002] Flexible DC capacitors are high-voltage power electronic devices that play a key role in flexible DC transmission technology. Their main function is to provide voltage support for DC systems, so they are also often called "DC support capacitors" or "DC-LINK capacitors".
[0003] In the packaging process of flexible DC capacitors, the capacitor body is usually fitted into a special heat-shrink tubing. The heat-shrink tubing is then heated to shrink and tightly wrap the flexible DC capacitor, thus forming an outer layer of insulation protection. This achieves insulation, moisture protection, dust protection, and mechanical reinforcement, ensuring that the flexible DC capacitor can work stably in complex environments.
[0004] The common method for heat shrink tubing is to directly apply the cut heat shrink tubing to the periphery of the flexible DC capacitor and heat the tubing with hot air or a heated tunnel furnace. This method can easily lead to insufficient air removal during the heating process, resulting in blistering. Blistering of the heat shrink tubing not only affects its appearance but can also create weak points in the electric field during high-voltage applications, increasing the risk of partial discharge and even causing cracks and damage to the heat shrink tubing. Summary of the Invention
[0005] To address the aforementioned deficiencies in the prior art, this application provides a flexible straight capacitor sleeve device that can reduce bubbling in heat shrink tubing and has strong practicality.
[0006] To achieve the above objectives, the present invention employs the following techniques: A flexible DC capacitor bushing device, comprising: The working ring has a heating tube filled inward on its inner ring surface. A mounting ring is connected to one side of the working ring. The central axis of the mounting ring is parallel to the central axis of the working ring along a certain interval direction. The working ring is rotatably mounted along the interval direction and its own axis. A rotating ring is rotatably fitted on the outer ring surface of the mounting ring. A rotating column parallel to the axis of the rotating ring is connected to the side of the rotating ring facing away from the working ring. A cutting disc is rotatably connected to the rotating column. A support ring is located outside the working ring on one side and its axis is parallel to the working ring's axis. A support column is coaxially inserted through the middle of the support ring. An inflatable sealing ring is filled into the cylindrical surface of the support column located inside the support ring. An air passage is coaxially passed through the middle of the support column. The end of the air passage facing away from the working ring is coaxially connected to a first air pipe. The first air pipe is used to connect to an external gas control mechanism. A loading frame located directly below the support column is connected to the side of the support ring facing the working ring. Rollers with wheel surfaces that contact the cylindrical surface of the support column are rotatably installed on the loading frame. The central axis of the support ring, the central axis of the working ring, and the central axis of the mounting ring are arranged in a three-axis coplanar configuration. The distance between the central axis of the cutting disc and the central axis of the mounting ring matches the sum of the radii of the cutting disc and the support column. A suction cup is located on the other side of the working ring and is coaxial with the support ring. It is moved along its own axis and its suction surface faces the working ring.
[0007] The beneficial effects of this invention are as follows: By setting up air channels and a first air tube, a high vacuum environment can be formed inside the heat shrink tubing, thereby reducing the air between the heat shrink tubing and the flexible capacitor, effectively reducing the bubbling phenomenon of the heat shrink tubing. At the same time, during the movement of the working ring towards the support ring, the heating tube slowly heats the heat shrink tubing in one direction. The heat shrink tubing shrinks along its own axis, reducing uneven heating and further reducing bubbling. Attached Figure Description
[0008] Figure 1 This is a perspective view of a flexible straight capacitor bushing device according to an embodiment of this application.
[0009] Figure 2 This is a three-dimensional schematic diagram of the working ring and its driving structure, and the mounting ring and its driving structure according to an embodiment of this application.
[0010] Figure 3 This is a three-dimensional schematic diagram of the support ring and support column according to an embodiment of this application.
[0011] Figure 4 This is a planar sectional view of the support ring and support column according to an embodiment of this application.
[0012] Figure 5 This is a three-dimensional schematic diagram of the suction cup and its driving structure according to an embodiment of this application.
[0013] Figure 6 This application Figure 5 A magnified view of a portion of point A in the middle.
[0014] Markings in the diagram: 1-Working ring, 11-Heating tube, 12-Mounting ring, 13-Rotating ring, 14-Rotating column, 15-Cutting disc, 16-First rotating motor, 17-Drive gear, 18-First drive frame, 19-First electric lead screw, 110-First drive block, 111-Second drive frame, 112-Second electric lead screw, 113-Second drive block, 2-Support ring, 21-Support column, 22-Inflatable sealing ring, 23-Air passage, 24-The first 1. Air pipe, 25. Loading frame, 26. Roller, 27. Support rod, 28. Second air pipe, 29. Second rotating motor, 210. Annular receiving groove, 211. Support rod, 3. Suction cup, 31. Third drive frame, 32. Third electric lead screw, 33. Third drive block, 34. Drive bar, 35. Connecting folding rod, 36. Working pipe, 37. Third rotating motor, 38. Pressure ring, 39. Slide rod, 310. Slide sleeve, 311. End, 312. Spring. Detailed Implementation
[0015] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the implementation methods of the present invention will be described in detail below with reference to the accompanying drawings. However, the embodiments described in this invention are only some embodiments of the present invention, and not all embodiments.
[0016] like Figure 1 As shown, this embodiment provides a flexible straight capacitor bushing device, including a working ring 1, a support ring 2, and a suction cup 3.
[0017] Specifically, such as Figure 1As shown, a first annular mounting groove is coaxially formed on the inner ring surface of the working ring 1. A heating tube 11 is embedded in the first annular mounting groove. In this example, the heating tube 11 can be an electric heating tube for heating the heat shrink tubing. A mounting ring 12 is connected to one side of the working ring 1. The central axis of the mounting ring 12 is parallel to the central axis of the working ring 1 along a certain interval direction. The working ring 1 is moved along the interval direction and its own axial direction. In this example, the interval direction is parallel to the horizontal plane where the equipment is placed. The inner diameter of the working ring 1, the inner diameter of the mounting ring 12, and the interval between the central axis of the mounting ring 12 and the central axis of the working ring 1 should simultaneously meet the following conditions: the heat shrink tubing can pass through both the mounting ring 12 and the working ring 1 at the same time, and when the central axis of the heat shrink tubing is parallel to the central axis of the mounting ring 12 and the working ring 1, the heat shrink tubing can pass through both the mounting ring 12 and the working ring 1 at the same time. When the central axis is three-axis coplanar, the working ring 1 moves along the interval direction. During the process of the heat shrink tubing's central axis moving from being coaxial with the central axis of the mounting ring 12 to being coaxial with the central axis of the working ring 1, the heat shrink tubing will not contact the inner ring surface of the working ring 1 or the inner ring surface of the mounting ring 12. The outer ring surface of the mounting ring 12 is coaxially provided with an annular mating groove, and a rotating ring 13 is coaxially rotatably fitted in the annular mating groove. More specifically, the mounting ring 12 can be disassembled into two halves from the middle of the annular mating groove to facilitate the installation of the rotating ring 13 into the annular mating groove. A rotating column 14 parallel to the axial direction of the rotating ring 13 is connected to the side of the rotating ring 13 facing away from the working ring 1. A cutting disc 15 is coaxially rotatably mounted on the rotating column 14, and the cutting disc 15 is used to cut the heat shrink tubing.
[0018] Specifically, such as Figures 1-4As shown, the support ring 2 is located outside one side of the working ring 1 and its axis is parallel to the axis of the working ring 1. A support column 21 is coaxially inserted through the middle of the support ring 2. In this example, the distance between the inner annular surface of the support ring 2 and the cylindrical surface of the support column 21 should match the thickness of the heat shrink tubing so that the heat shrink tubing can pass just between the support ring 2 and the support column 21. The cylindrical surface of the support column 21 located inside the support ring 2 has a second annular mounting groove coaxially formed inward. An inflatable sealing ring 22 is coaxially provided in the second annular mounting groove. When not inflated, the inflatable sealing ring 22 is retracted in the second annular mounting groove, providing an inflatable seal. When inflated, the outer circumference of ring 22 extends beyond the second annular mounting groove and contacts the inner wall of the heat-shrinkable tubing passing between the support ring 2 and the support column 21, pressing the outer wall of the heat-shrinkable tubing against the inner annular surface of the support ring 2. Simultaneously, the contact between the heat-shrinkable tubing and the inflation sealing ring 22 is airtight. An air passage 23 coaxially runs through the middle of the support column 21. The end of the air passage 23 facing away from the working ring 1 is coaxially connected to a first air pipe 24. The first air pipe 24 is used to connect to an external gas control mechanism. More specifically, the first air pipe 24 should be long enough to allow the device to store more... A long heat-shrink tubing; a loading frame 25 located directly below the support column 21 is connected to the side of the support ring 2 facing the working ring 1. A roller 26 is rotatably mounted on the loading frame 25, and the wheel surface of the roller 26 contacts the cylindrical surface of the support column 21. In this example, the vertical distance between the two sides of the roller 26 and the central axis of the support ring 2 should be equal. The roller 26 is used to contact the outer wall of the heat-shrink tubing when it passes between the support ring 2 and the support column 21, and to drive the heat-shrink tubing to move along its own axial direction; the central axis of the support ring 2, the central axis of the working ring 1, and the central axis of the mounting ring 12 are three-axis coplanar. The setting is configured to make the central axis of the working ring 1 of the heat shrink tubing coplanar with the central axis of the mounting ring 12. The distance between the central axis of the cutting disc 15 and the mounting ring 12 is matched with the sum of the radii of the cutting disc 15 and the support column 21. This matching is used so that when the working ring 1 moves along its own axis to the point where the cutting disc 15 is located around the support column 21 and the mounting ring 12 is coaxial with the support column 21, the cutting disc 15 can just contact the cylindrical surface of the support column 21 and roll on the cylindrical surface of the support column 21 under the rotation of the rotating ring 13, cutting the heat shrink tubing on the cylindrical surface of the support column 21.
[0019] Specifically, such as Figure 1 As shown, the suction cup 3 is located on the other side of the working ring 1 and is coaxial with the support ring 2. It is moved along its own axial direction and its adsorption surface is facing the working ring 1. The suction cup 3 is used to coaxially adsorb the flexible straight capacitor to be sleeved.
[0020] During operation, the uncut long heat shrink tubing is coaxially inserted from the end of the support column 21 toward the working ring 1. When the end of the heat shrink tubing contacts the roller 26, manual insertion is no longer required. The roller 26 is then activated, driving the remaining heat shrink tubing to move. Most of the heat shrink tubing will be coaxially fitted around the first air tube 24 for subsequent storage. Preferably, a support frame can be provided below the first air tube 24 to support the heat shrink tubing located around the first air tube 24. More preferably, the cylindrical surface of the support column 21 can be a smooth surface with high smoothness, and the roller 2... The wheel surface of 6 can be set as a rubber surface with a high anti-slip coefficient. In practical applications, the extremely long first air tube 24 is prone to bending and deformation. Therefore, the roller 26 actually supports the support column 21. When there is no heat shrink tubing around the support column 21, the roller 26 directly contacts the support column 21. When there is heat shrink tubing around the support column 21, the support column 21 presses the heat shrink tubing tightly onto the roller 26. Since the cylindrical surface of the support column 21 is a smooth surface with a high smoothness and the wheel surface of the roller 26 is a rubber surface with a high anti-slip coefficient, the roller 26 can directly drive the heat shrink tubing to move by its own rolling.
[0021] The working ring 1 is moved to be coaxial with the support ring 2. The heat shrink tubing is moved by the roller 26, causing a portion of the heat shrink tubing to extend from the support column 21 towards the working ring 1 and coaxially pass through the support ring 2. At this time, a flexible straight capacitor is coaxially picked up by the suction cup 3, and the suction cup 3 is moved to allow the flexible straight capacitor to enter the heat shrink tubing. The working ring 1 is moved, and the heating tube 11 evenly heats the heat shrink tubing around the end of the flexible straight capacitor that is attached to the suction cup 3. This portion of the heat shrink tubing will first shrink and adhere to the edge of one end face and one end of the side wall of the flexible straight capacitor. Then, the heat shrink tubing is allowed to cool slightly. Then, the inflatable sealing ring 22 is inflated, forming a sealed space between the flexible straight capacitor and the surrounding heat shrink tubing. Air is drawn from the heat-shrink tubing through the first air pipe 24 and air passage 23 to increase the vacuum level of the sealed space. At the same time, the working ring 1 slowly moves towards the support ring 2, and the heating tube 11 heats the heat-shrink tubing on the middle periphery of the flexible capacitor, causing it to shrink and adhere to the middle of the side wall of the flexible capacitor. During this process, the high vacuum level inside the heat-shrink tubing can reduce the air between the heat-shrink tubing and the flexible capacitor, effectively reducing the bubbling phenomenon of the heat-shrink tubing. Meanwhile, as the working ring 1 moves towards the support ring 2, the heating tube 11 slowly heats the heat-shrink tubing in one direction, that is, the heat-shrink tubing shrinks along its own axis, and there is no phenomenon of shrinking at both ends while the middle has not shrunk due to uneven heating, further reducing the bubbling phenomenon.
[0022] After the heat-shrinkable tubing on the central periphery of the flexible DC capacitor has been heated and shrunk, the working ring 1 is moved so that the mounting ring 12 is coaxial with the support ring 2, and the cutting disc 15 contacts the cylindrical surface of the support column 21. At this time, the cutting disc 15 has cut a small part of the heat-shrinkable tubing. The rotating ring 13 is rotated so that the cutting disc 15 rolls on the cylindrical surface of the support column 21 to achieve a circumferential cut of the heat-shrinkable tubing. After the circumferential cut is completed, the suction cup 3 is moved so that the cut heat-shrinkable tubing leaves the support column 21. Then, the heating tube 11 is used to heat and shrink the last part of the heat-shrinkable tubing, thus completing the sleeve process of the flexible DC capacitor. The sleeved flexible DC capacitor is then unloaded, and the next sleeve process can begin.
[0023] Preferred, such as Figure 2 As shown, the outer ring surface of the rotating ring 13 is configured as a toothed ring, and the outer ring surface of the working ring 1 is provided with a first rotating motor 16 whose driving direction is parallel to the axial direction of the rotating ring 13. The drive shaft of the first rotating motor 16 is coaxially connected to a drive gear 17, which meshes with the outer ring surface of the rotating ring 13. The first rotating motor 16 is used to drive the rotating ring 13 to rotate through the meshing of the drive gear 17 with the outer ring surface of the rotating ring 13.
[0024] Preferred, such as Figure 2 As shown, a first drive frame 18 is fixedly installed below the working ring 1. The first drive frame 18 contains a first electric lead screw 19 whose driving direction is parallel to the interval direction. The drive shaft of the first electric lead screw 19 is threadedly fitted with a first drive block 110. The first drive block 110 is in sliding contact with the first drive frame 18. A second drive frame 111 is installed on the first drive block 110. The second drive frame 111 contains a second electric lead screw 112 whose driving direction is parallel to the axial direction of the working ring 1. The drive shaft of the second electric lead screw 112 is threadedly fitted with a second drive block 113. The second drive block 113 is in sliding contact with the second drive frame 111 and is connected to the working ring 1. The first electric lead screw 19 is used to drive the working ring 1 to move along the interval direction, and the second electric lead screw 112 is used to drive the working ring 1 to move along its own axial direction.
[0025] Preferred, such as Figure 3 As shown, a support rod 27 is connected to the outer ring surface of the support ring 2. The support rod 27 is set on the horizontal plane where the device is placed and is used to fix the support ring 2.
[0026] Preferred, such as Figure 1 and Figure 4 As shown, a second air pipe 28 is embedded inside the support column 21. One end of the second air pipe 28 extends into the second annular mounting groove and communicates with the inflation sealing ring 22. The other end of the second air pipe 28 extends from the end of the support column 21 facing away from the working ring 1 and is used to connect with the external gas control mechanism. The second air pipe 28 is used to control the inflation state of the inflation sealing ring 22.
[0027] Preferred, such as Figure 3 As shown, a second rotating motor 29 is provided on the loading frame 25. The drive shaft of the second rotating motor 29 is coaxially connected to the roller 26 for driving the roller 26 to rotate.
[0028] Preferred, such as Figure 2 and Figure 3 As shown, the support column 21 has a chamfered edge at one end facing the working ring 1. The chamfer is used to facilitate the insertion of the heat shrink tubing into the support column 21 when adding long heat shrink tubing to the device. The side wall of the support column 21 between the chamfer and the roller 26 has an annular receiving groove 210 coaxially formed inward. More preferably, the distance between the central axis of the cutting disc 15 and the mounting ring 12 matches the sum of the radii of the cutting disc 15 and the bottom of the annular receiving groove 210. With this design, the cutting disc 15 rolls at the bottom of the annular receiving groove 210 during cutting. This not only ensures that the surface of the support column 21 maintains a high degree of smoothness, but also allows the cutting disc 15 to cut deeper, making it easier for the cutting disc 15 to cut the heat shrink tubing.
[0029] Preferred, such as Figure 5 and Figure 6 As shown, a third drive frame 31 is fixedly installed below the suction cup 3. The third drive frame 31 is equipped with a third electric screw 32 whose driving direction is parallel to the axis of the working ring 1. The drive shaft of the third electric screw 32 is threadedly fitted with a third drive block 33. The third drive block 33 is in sliding contact with the third drive frame 31. The third drive block 33 is connected to a drive bar 34. The drive bar 34 is connected to a connecting folding rod 35. The suction cup 3 is coaxially connected to a working tube 36. The connecting folding rod 35 is connected to the working tube 36. The working tube 36 is used to communicate with an external gas control mechanism through a soft tube. The third electric screw 32 is used to drive the suction cup 3 to move around its own axis.
[0030] Preferred, such as Figure 1 , Figure 5 , Figure 6 As shown, the third drive block 33 is equipped with a third rotating motor 37 whose driving direction is perpendicular to the suction cup 3. The drive shaft of the third rotating motor 37 is connected to the drive bar 34. When the third rotating motor 37 drives the suction cup 3 to rotate to a predetermined position, the suction cup 3 and the support ring 2 are coaxial. With this design, the third rotating motor 37 can drive the suction cup 3 to rotate, which can make the suction cup 3 reach a position that is more convenient for loading and unloading flexible capacitors.
[0031] Preferred, such as Figure 3 , Figure 5 , Figure 6As shown, a pressure ring 38 is coaxially sleeved around the outer side of the working tube 36. A connecting rod 35 is connected to the pressure ring 38. A sliding rod 39 parallel to the axial direction of the working tube 36 is connected to the side of the pressure ring 38 facing away from the suction cup 3. A sliding sleeve 310 is slidably sleeved on the sliding rod 39 and is connected to the working tube 36. An end 311 is provided at the end of the sliding rod 39 facing away from the pressure ring 38. A spring 312 is coaxially sleeved around the outer side of the sliding rod 39. The two ends of the spring 312 are connected to the pressure ring 38 and the sliding sleeve 310, respectively. When the spring 312 is in its original state, the sliding sleeve 310 is in contact with the end 311. A stop rod 211 parallel to its own axial direction is connected to the end of the support column 21 facing the working ring 1. With this design, in the heat shrink tubing When the heat shrink tubing is initially attached to the edge of one end face of the flexible capacitor, there may be a gap between the heat shrink tubing and the flexible capacitor. This could prevent the first air tube 24 and air passage 23 from creating a high vacuum environment during subsequent evacuation. Therefore, a pressure ring 38 is provided here. When the third electric screw 32 is driven, the flexible capacitor can first contact the push rod 211. At this time, heating begins, causing the heat shrink tubing to adhere to one end face of the flexible capacitor. After cooling, the third electric screw 32 continues to drive. At this time, the suction cup 3 no longer moves, only the pressure ring 38 moves, and the spring 312 is stretched until the pressure ring 38 presses the heat shrink tubing tightly against one end face of the flexible capacitor. This avoids gaps between the heat shrink tubing and the flexible capacitor.
[0032] The above description is only a preferred embodiment of this application and is not intended to limit this application. Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application.
Claims
1. A flexible DC capacitor bushing device, characterized in that, include: A working ring (1) has a heating tube (11) filled inward on its inner ring surface. A mounting ring (12) is connected to one side of the working ring (1). The central axis of the mounting ring (12) is parallel to the central axis of the working ring (1) along a certain interval direction. The working ring (1) is moved along the interval direction and its own axial direction. A rotating ring (13) is coaxially rotated and fitted on the outer ring surface of the mounting ring (12). A rotating column (14) parallel to the axial direction of the rotating ring (13) is connected to the side of the rotating ring (13) facing away from the working ring (1). A cutting disc (15) is coaxially rotated and mounted on the rotating column (14). A support ring (2) is located outside the working ring (1) on one side and is axially parallel to the working ring (1). A support column (21) is coaxially inserted through the middle of the support ring (2). An inflatable sealing ring (22) is filled inward on the cylindrical surface of the support column (21) inside the support ring (2). An air passage (23) is coaxially inserted through the middle of the support column (21). A first air pipe (24) is coaxially connected to the end of the air passage (23) facing away from the working ring (1). The first air pipe (24) is used to connect with an external gas control mechanism. Next, the support ring (2) is connected to a loading frame (25) located directly below the support column (21) on the side facing the working ring (1). The loading frame (25) is rotatably equipped with a roller (26) whose wheel surface contacts the cylindrical surface of the support column (21). The central axis of the support ring (2), the central axis of the working ring (1), and the central axis of the mounting ring (12) are arranged in a three-axis coplanar manner. The distance between the central axis of the cutting disc (15) and the mounting ring (12) matches the sum of the radii of the cutting disc (15) and the support column (21). A suction cup (3) is located on the other side of the working ring (1) and is coaxial with the support ring (2), and is moved along its own axis.
2. The flexible DC capacitor bushing device according to claim 1, characterized in that, The outer ring surface of the rotating ring (13) is set as a toothed ring, and the outer ring surface of the working ring (1) is provided with a first rotating motor (16) whose driving direction is parallel to the axis of the rotating ring (13). The drive shaft of the first rotating motor (16) is coaxially connected with a drive gear (17), and the drive gear (17) meshes with the outer ring surface of the rotating ring (13).
3. The flexible DC capacitor bushing device according to claim 1, characterized in that, A first drive frame (18) is fixedly installed below the working ring (1). The first drive frame (18) is provided with a first electric screw (19) whose driving direction is parallel to the interval direction. The drive shaft of the first electric screw (19) is threadedly fitted with a first drive block (110). The first drive block (110) is in sliding contact with the first drive frame (18). A second drive frame (111) is provided on the first drive block (110). The second drive frame (111) is provided with a second electric screw (112) whose driving direction is parallel to the axis of the working ring (1). The drive shaft of the second electric screw (112) is threadedly fitted with a second drive block (113). The second drive block (113) is in sliding contact with the second drive frame (111). The second drive block (113) is connected to the working ring (1).
4. The flexible DC capacitor bushing device according to claim 1, characterized in that, The outer ring of the support ring (2) is connected to a support rod (27), which is used to fix the support ring (2).
5. The flexible DC capacitor bushing device according to claim 1, characterized in that, The support column (21) is equipped with a second air pipe (28). One end of the second air pipe (28) is connected to the air-filled sealing ring (22), and the other end of the second air pipe (28) extends from the end of the support column (21) facing away from the working ring (1) for connection with the external gas control mechanism.
6. The flexible DC capacitor bushing device according to claim 1, characterized in that, The loading frame (25) is equipped with a second rotating motor (29), and the drive shaft of the second rotating motor (29) is coaxially connected to the roller (26).
7. The flexible DC capacitor bushing device according to claim 1, characterized in that, The support column (21) has a chamfer on one end of the working ring (1), and the side wall of the support column (21) between the chamfer and the roller (26) has an annular receiving groove (210) coaxially inward.
8. The flexible DC capacitor bushing device according to claim 1, characterized in that, A third drive frame (31) is fixedly installed below the suction cup (3). The third drive frame (31) is equipped with a third electric screw (32) whose drive direction is parallel to the axis of the working ring (1). The drive shaft of the third electric screw (32) is threadedly fitted with a third drive block (33). The third drive block (33) slides in contact with the third drive frame (31). The third drive block (33) is connected to a drive bar (34). The drive bar (34) is connected to a connecting lever (35). The suction cup (3) is coaxially connected to a working tube (36). The connecting lever (35) is connected to the working tube (36). The working tube (36) is used to communicate with the external gas control mechanism through a soft tube.
9. The flexible DC capacitor bushing device according to claim 8, characterized in that, The third drive block (33) is equipped with a third rotating motor (37) whose driving direction is perpendicular to the suction cup (3). The drive shaft of the third rotating motor (37) is connected to the drive bar (34). When the third rotating motor (37) drives the suction cup (3) to rotate to a predetermined position, the suction cup (3) is coaxial with the support ring (2).
10. The flexible DC capacitor bushing device according to claim 8, characterized in that, A pressure ring (38) is coaxially sleeved on the outer side of the working tube (36). A connecting rod (35) is connected to the pressure ring (38). A sliding rod (39) parallel to the axis of the working tube (36) is connected to the side of the pressure ring (38) facing away from the suction cup (3). A sliding sleeve (310) is provided on the sliding rod (39). The sliding sleeve (310) is connected to the working tube (36). An end head (311) is provided at the end of the sliding rod (39) facing away from the pressure ring (38). A spring (312) is coaxially sleeved on the outer side of the sliding rod (39). The two ends of the spring (312) are connected to the pressure ring (38) and the sliding sleeve (310) respectively. When the spring (312) is in its original state, the sliding sleeve (310) is in contact with the end head (311). A push rod (211) parallel to its own axis is connected to the end of the support column (21) facing the working ring (1).