A flexible straight capacitor flat core hot pressing device

Abstract

The application provides a kind of flexible straight capacitor flat core hot pressing device, relating to flexible straight capacitor processing technology, comprising: bearing mechanism, including fixed bearing frame and dynamic bearing frame, fixed bearing frame is arranged on a bottom plate and is communicated with vacuum pipe, dynamic bearing frame is arranged above and spacing is adjustable, fixed bearing frame and dynamic bearing frame are all through semicircular mouth;Mold mechanism, including fixed arc plate and dynamic arc plate, fixed arc plate is arranged in fixed bearing frame, dynamic arc plate is arranged in dynamic bearing frame, fixed arc plate and dynamic arc plate are all embedded with oil pipeline, vacuum pipe is arranged above the inner arc surface of fixed arc plate;Clamping mechanism, including a pair of clamping plates, clamping plate is arranged along the height direction and the width direction of fixed arc plate, the opposite surface is all inwardly provided with mounting groove, mounting groove is all provided with heating pipe, the opposite surface of clamping plate is all communicated with support pipe.The application can reduce the air remaining between film layers after hot pressing, improve the efficiency of cooling and shaping, and has strong practicability.

Description

Technical Field

[0001] This application relates to flexible straight capacitor processing technology, specifically to a flexible straight capacitor flat core hot pressing device. Background Technology

[0002] Flexible DC capacitors are high-performance capacitors used in converter valves or on the DC side of flexible DC transmission projects. "Flexible DC" refers to flexible DC transmission technology, which is a high-voltage DC transmission technology based on fully controllable power electronic devices. It has advantages such as independent control of active / reactive power meters, ability to supply power to passive networks, and suitability for grid connection of new energy sources. In flexible DC transmission projects, flexible DC capacitors are mainly used for energy storage, filtering, voltage stabilization, and suppression of voltage fluctuations.

[0003] Flexible DC capacitors are high-voltage, large-capacity, and high-reliability dry-type film power capacitors. Their manufacturing process is highly precise, requiring consideration of electrical performance, thermal management, mechanical strength, and long-term reliability. In existing technologies, the manufacturing process of flexible DC capacitors generally includes film metallization, winding, flat core hot pressing, gold spraying, energy conversion, encapsulation, shell assembly, and testing. In the flat core hot pressing process, the capacitor core, which is wound into a cylindrical shape, is typically pressed into a flat structure by heating and pressurizing to meet the stringent requirements of flexible DC converter valve submodules for space compactness, heat dissipation efficiency, and electrical performance.

[0004] Currently, conventional equipment used for hot pressing of flat cores of flexible CNC capacitors often results in a large amount of residual air between the film layers after hot pressing, which affects the performance and safety of the flexible CNC capacitor. Secondly, after hot pressing, the flat core needs to be cooled and shaped under pressure to prevent it from springing back after depressurization. However, conventional equipment used for hot pressing of flat cores of flexible CNC capacitors has a long cooling time, resulting in low cooling efficiency. Summary of the Invention

[0005] To address the aforementioned deficiencies in the prior art, this application provides a hot pressing device for flat cores of flexible capacitors, which can reduce the residual air between film layers after hot pressing, improve the efficiency of cooling and shaping, and has strong practicality.

[0006] To achieve the above objectives, the present invention employs the following techniques: A flexible straight capacitor flat core hot pressing device, comprising: The load-bearing mechanism includes a fixed load-bearing frame and a movable load-bearing frame. The fixed load-bearing frame is set on a base plate and one end of it is connected to a vacuum tube. The movable load-bearing frames are arranged parallel to the fixed load-bearing frame at intervals along the height direction and the intervals are adjustable. The cross-sectional dimensions of the movable load-bearing frame and the fixed load-bearing frame are matched in the height direction. The center of the upper two ends of the fixed load-bearing frame and the center of the lower two ends of the movable load-bearing frame are both provided with semi-circular openings along the length direction of the fixed load-bearing frame. The mold mechanism includes a fixed arc plate and a movable arc plate, both with semi-elliptical cross-sections and matched dimensions. The central axes of the fixed arc plate and the movable arc plate are parallel to the length direction. The fixed arc plate is located inside a fixed support frame with its inner arc surface facing upward. Its two sides are flush with and connected to the two sides of the upper part of the fixed support frame, and its two ends are connected to the inner walls of the two ends of the fixed support frame. The movable arc plate is moved along the height direction and located inside a movable support frame with its inner arc surface facing downward. Its four sides are in sliding contact with the inner wall of the movable support frame. Both the fixed arc plate and the movable arc plate are embedded with serpentine oil passages. A vacuum tube is located above the inner arc surface of the fixed arc plate. The clamping mechanism includes a pair of clamping plates whose dimensions match the inner arc surface of the fixed arc plate and are arranged parallel to each other along the length direction with adjustable spacing. The clamping plates are movable along the height direction and the width direction of the fixed arc plate. The opposite surfaces of the clamping plates are provided with mounting grooves, and heating tubes are provided in the mounting grooves. The opposite back surfaces of the clamping plates are coaxially connected to support tubes whose dimensions match the semi-circular opening.

[0007] The beneficial effects of this invention are as follows: 1. A vacuum environment is formed by the bearing mechanism and the mold mechanism, and the capacitor core of the film capacitor is hot-pressed by the moving bearing plate and the fixed bearing plate in the mold mechanism, which reduces the problem of too much air remaining between the film layers during the hot pressing process.

[0008] 2. By moving the moving support frame and the moving arc plate relative to each other, the capacitor core can be pre-pressed first and then finely pressed in a vacuum environment. This reduces the volume of the vacuum environment, reduces the load on the vacuum pump, and facilitates the creation of a higher vacuum degree, further reducing the air remaining between the film layers after hot pressing.

[0009] 3. The heat exchange between the cold oil and the capacitor core is achieved through the oil pipes inside the fixed arc plate and the moving arc plate, which improves the cooling efficiency of the capacitor core under pressure. Attached Figure Description

[0010] Figure 1 This is a perspective view of the flexible straight capacitor flat core hot pressing device according to an embodiment of this application.

[0011] Figure 2 This is an exploded structural diagram of the supporting mechanism, mold mechanism, and clamping mechanism according to an embodiment of this application.

[0012] Figure 3 This is a cross-sectional schematic diagram of the support mechanism and the mold mechanism in an embodiment of this application.

[0013] Figure 4 This is a schematic diagram of the operation of the liquid pump and hydraulic cylinder according to an embodiment of this application.

[0014] Figure 5This is a perspective view of the flexible straight capacitor flat core hot pressing device according to an embodiment of this application.

[0015] Figure 6 This application Figure 5 A magnified view of a portion of point A in the middle.

[0016] Figure 7 This is a schematic diagram of the driving structure of the clamping plate according to an embodiment of this application.

[0017] Figure 8 This is a schematic diagram of the working state of the flexible straight capacitor flat core hot pressing device according to an embodiment of this application. Figure 1 .

[0018] Figure 9 This is a schematic diagram of the working state of the flexible straight capacitor flat core hot pressing device according to an embodiment of this application. Figure 2 .

[0019] Figure 10 This is a schematic diagram of the working state of the flexible straight capacitor flat core hot pressing device according to an embodiment of this application. Figure 3 .

[0020] In the diagram, the markings are as follows: 11-Fixed bearing frame, 12-Moving bearing frame, 13-Vacuum tube, 14-Semi-circular opening, 15-Mounting block, 16-Rectangular corrugated ring, 17-First bearing frame, 18-Hydraulic cylinder, 19-Air supply pipe, 110-Air valve, 21-Fixed arc plate, 22-Moving arc plate, 23-Oil supply line, 24-Heat insulation plate, 25-Liquid pump, 26-Oil inlet hose, 27-Oil inlet pipe, 28-Main oil supply pipe, 29-Secondary oil supply pipe, 210-Liquid valve, 211-Oil outlet hose, 212-Oil outlet pipe, 213-First sealing strip, 214-Second sealing strip. 3-Clamping plate, 31-Mounting groove, 32-Heating tube, 33-Support tube, 34-First mounting bracket, 35-Slide rod, 36-Slide sleeve, 37-Spring, 38-Connecting plate, 39-Second mounting bracket, 310-Fixing block, 311-Screw, 312-First rotating motor, 313-First mating block, 314-Second bearing bracket, 315-Third mounting bracket, 316-Electric lead screw, 317-Second mating block, 318-Conveyor belt, 319-Third bearing bracket, 320-Linear cylinder, 321-Lower pressure strip, 322-Third sealing strip, 4-Base plate. Detailed Implementation

[0021] 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.

[0022] like Figure 1As shown, this embodiment provides a hot pressing device for flat core of flexible capacitor, including a bearing mechanism, a mold mechanism, and a clamping mechanism.

[0023] Specifically, such as Figure 1 As shown, the bearing mechanism includes a fixed bearing frame 11 and a movable bearing frame 12. Both the fixed bearing frame 11 and the movable bearing frame 12 are rectangular frame structures. The fixed bearing frame 11 is mounted on a base plate 4 and has a vacuum tube 13 through one end for connecting to a vacuum pump in the outside. The movable bearing frame 12 is arranged parallel to the fixed bearing frame 11 at intervals along its height direction and is positioned directly above it with adjustable spacing. The cross-sectional dimensions of the movable bearing frame 12 and the fixed bearing frame 11 are matched in the height direction. That is, when the upper part of the fixed bearing frame 11 contacts the lower part of the movable bearing frame 12, the four sides of the upper part of the fixed bearing frame 11 contact the four sides of the lower part of the movable bearing frame 12 respectively. The center of the two upper ends of the fixed bearing frame 11 and the center of the two lower ends of the movable bearing frame 12 both have semi-circular openings 14 through the length direction of the fixed bearing frame 11.

[0024] Specifically, such as Figure 2 and Figure 3 As shown, the mold mechanism includes a fixed arc plate 21 and a movable arc plate 22, both with semi-elliptical cross-sections and matching dimensions. The central axes of both the fixed arc plate 21 and the movable arc plate 22 are parallel to the length direction. The fixed arc plate 21 is disposed within the fixed support frame 11 with its inner arc surface facing upwards. Its two sides are flush with and connected to the upper two sides of the fixed support frame 11, and its two ends are connected to the inner walls of the two ends of the fixed support frame 11. The movable arc plate 22 is moved along the height direction and disposed within the movable support frame 12 with its inner arc surface facing downwards. Its four sides are in sliding contact with the inner wall of the movable support frame 12. This design allows the movable arc plate 22 to close with the fixed arc plate 21 during movement, i.e., the movable arc plate... The two sides of the fixed arc plate 22 contact the two sides of the fixed arc plate 21 respectively, and when the upper part of the fixed bearing frame 11 contacts the lower part of the moving bearing frame 12, a sealed space is formed between the moving arc plate 22 and the fixed arc plate 21. Both the fixed arc plate 21 and the moving arc plate 22 are embedded with serpentine oil passages 23. More specifically, the two ends of the oil passages 23 are respectively connected to the outer arc surface of the fixed arc plate 21 or the moving arc plate 22, for connecting with the external hot oil or cold oil transfer pump. The vacuum tube 13 is located above the inner arc surface of the fixed arc plate 21, for creating high vacuum conditions in the sealed space between the moving arc plate 22 and the fixed arc plate 21 through the externally connected vacuum pump.

[0025] Specifically, such as Figure 2As shown, the clamping mechanism includes a pair of clamping plates 3 whose dimensions match the inner arc surface of the fixed arc plate 21 and are arranged parallel to each other along the length direction with adjustable spacing. The dimensional matching here means that when the movable arc plate 22 and the fixed arc plate 21 are closed, the edge of the clamping plate 3 can just contact the inner arc surfaces of the movable arc plate 22 and the fixed arc plate 21, that is, at this time, a smaller, sealed space can be formed between the two clamping plates 3. The clamping plates 3 are all movable along the height direction and the width direction of the fixed support frame 11, and their opposing surfaces are all provided with inwardly facing mounting brackets. The mounting groove 31 is equipped with a heating tube 32, which is used to radiate heat into the sealed space between the two clamping plates 3. The opposite sides of the clamping plates 3 are coaxially connected with a support tube 33 whose size matches the semi-circular opening 14. That is, when the upper and lower semi-circular openings 14 are closed to form a circular opening, the support tube 33 just passes through the circular opening and contacts the inner side of the circular opening. The support tube 33 is used to connect to the external gas flow control mechanism. More specifically, the power supply line of the heating tube 32 can be buried inside the wall of the support tube 33.

[0026] During operation, the clamping plates 3 are used to clamp both ends of the capacitor core. The clamping plates 3 are then moved along the width direction to between the fixed arc plate 21 and the moving arc plate 22, so that the central axis of the capacitor core, the central axis of the fixed arc plate 21, and the central axis of the moving arc plate 22 are coplanar. At this time, the spacing of the clamping plates 3 is increased, and the capacitor core is released from the clamping plates 3 and falls at the center of the fixed arc plate 21.

[0027] Adjust the predetermined position of the movable arc plate 22 within the movable support frame 12 so that the distance between the lower part of the movable support frame 12 and the center of the inner arc surface of the movable arc plate 22 in the height direction is a predetermined value. This predetermined value should be less than the difference between the diameter of the capacitor core and the distance between the center of the inner arc surface of the fixed arc plate 21 and the central axis.

[0028] After the initial setup is completed, the movable support frame 12 and the movable arc plate 22 are moved downwards synchronously. When the semicircular opening 14 of the movable support frame 12 contacts the support tube 33, the support tube 33 moves downwards along with the movable support frame 12. Since the distance between the lower part of the movable support frame 12 and the center of the inner arc surface of the movable arc plate 22 in the height direction is set to a predetermined value, in the subsequent movement process, if... Figure 8 As shown, the moving arc plate 22 can first contact the upper part of the capacitor core; at this time, the moving arc plate 22 and the fixed arc plate 21 together pre-compress the capacitor core until the moving support frame 12 contacts the fixed support frame 11, as shown. Figure 9 As shown.

[0029] When the moving support frame 12 contacts the fixed support frame 11, the pre-compression of the capacitor core by the moving arc plate 22 and the fixed arc plate 21 is completed. At this time, a closed space is formed between the moving arc plate 22 and the fixed arc plate 21. The air pressure in this closed space is reduced by the vacuum tube 13 and the external vacuum pump to create a high vacuum environment. The capacitor core is radiated and heated by the heating tube 32 to reach the predetermined temperature required for hot pressing. After reaching the predetermined temperature, the moving arc plate 22 is moved downward to perform fine pressing until the two sides of the fixed arc plate 21 contact the moving arc plate 22. Figure 10 As shown, at this time, the capacitor core reaches the ideal shape, and the surface of the capacitor core is in complete contact with the inner arc surfaces of the fixed arc plate 21 and the moving arc plate 22.

[0030] Stop heating the heating tube 32 and introduce a continuous flow of cooling oil into the oil passage 23. The cooling oil exchanges heat with the capacitor core through the fixed arc plate 21 and the moving arc plate 22, so that the capacitor core can be rapidly cooled and shaped under vacuum and high pressure.

[0031] After cooling, air is slowly supplied to the enclosed space between the clamping plates 3 through the support tube 33, so that the air pressure rises slowly and avoids the sudden increase in air pressure affecting the shape of the capacitor core. After the flat core hot pressing is completed, the moving arc plate 22 is moved upward to the predetermined position, and then the moving arc plate 22, the moving support frame 12 and the clamping plate 3 are moved upward slightly in sync, so that the moving support frame 12 is separated from the fixed support frame 11. At this time, the clamping plates 3 are clamped by reducing the distance between them. After clamping, the moving arc plate 22, the moving support frame 12 and the clamping plate 3 are moved upward a distance in sync. Finally, the moving arc plate 22 and the moving support frame 12 are moved upward a distance in sync, so that the support tube 33 is disengaged from the semi-circular opening 14 of the moving support frame 12. Then, the clamping plate 3 is moved away from the fixed arc plate 21 and the moving arc plate 22 along the width direction, and the capacitor core is unloaded, thus completing the flat core hot pressing process.

[0032] This design incorporates three processes: pre-pressing, fine pressing, and cooling. A vacuum environment is provided during fine pressing, reducing residual air between film layers after hot pressing. Simultaneously, the step of hot pressing followed by fine pressing reduces the volume of the vacuum environment, decreasing the load on the vacuum pump and facilitating the creation of a higher vacuum level, further reducing residual air between film layers after hot pressing. In the cooling process, heat exchange between the cooling oil and the capacitor core is achieved through the oil pipes 23 within the fixed arc plate 21 and the moving arc plate 22, improving the cooling efficiency of the capacitor core under pressure.

[0033] Preferred, such as Figure 2 and Figure 3As shown, both the fixed support frame 11 and the movable support frame 12 are provided with mounting blocks 15. The four sides of the mounting block 15 in the fixed support frame 11 are fixed to the four inner walls of the fixed support frame 11, and the four sides of the mounting block 15 in the movable support frame 12 are in sliding contact with the four inner walls of the fixed support frame 11. The opposite sides of the two mounting blocks 15 are provided with arc-shaped surfaces that extend inward. The arc-shaped surfaces extend through both ends of the mounting blocks 15 along the length of the fixed support frame 11. The outer arc surfaces and both end faces of the fixed arc plate 21 and the movable arc plate 22 are covered with heat insulation plates 24. The outer side walls of the heat insulation plates 24 are respectively attached to the arc-shaped surfaces. The two ends of the heat insulation plates 24 on the fixed arc plate 21 are fixed to the inner walls of the fixed support frame 11, and the two ends of the heat insulation plates 24 on the movable arc plate 22 are in sliding contact with the inner walls of the movable support frame 12.

[0034] With this design, the mounting block 15 provides further support for the fixed arc plate 21 and the moving arc plate 22, preventing excessive pressure from causing deformation of the fixed arc plate 21 and the moving arc plate 22. The heat insulation plate 24 is used to reduce the heat exchange between the cooling oil flowing in the oil pipe 23 inside the fixed arc plate 21 and the moving arc plate 22 and components such as the fixed support frame 11 and the moving support frame 12, thereby improving the heat exchange efficiency between the cooling oil and the capacitor core.

[0035] Further preferred, such as Figure 3 As shown, the oil passage 23 located in the fixed arc plate 21 passes through the corresponding heat insulation plate 24, mounting block 15 and fixed support frame 11 at both ends, and extends to the outer arc surface of the fixed support frame 11. At the same time, the contact surfaces of the fixed arc plate 21, heat insulation plate 24, mounting block 15 and fixed support frame 11 should be liquid-tight. The oil passage 23 located in the moving arc plate 22 passes through the corresponding heat insulation plate 24 and mounting block 15 at both ends, and extends to the upper surface of the mounting block 15. At the same time, the contact surfaces of the moving arc plate 22, heat insulation plate 24 and mounting block 15 should be airtight. This design is used to introduce cooling oil into the oil passage 23 from the outside.

[0036] Preferred, such as Figure 3 and Figure 4As shown, two liquid pumps 25 are installed on the base plate 4. The outlet end of one liquid pump 25 is connected to an oil inlet hose 26, which is connected to one end of the oil passage 23 in the moving arc plate 22 on the upper surface of the mounting block 15 in the moving support frame 12. This liquid pump 25 is used to supply oil to the oil passage 23 in the moving arc plate 22 through the oil inlet hose 26. The outlet end of the other liquid pump 25 is connected to an oil inlet pipe 27, which is connected to one end of the oil passage 23 in the fixed arc plate 21 on the outer arc surface of the fixed support frame 11. This other liquid pump 25 is used to supply oil to the oil passage 23 in the fixed arc plate 21 through the oil inlet pipe 27. The oil inlet pipe 27 here can be a rigid pipe structure or a flexible pipe structure. Similar to the inlet hose 26, the inlet hose 26 mentioned above is used to match the mobility of the mounting block 15 inside the moving support frame 12; the oil passage 23 inside the moving arc plate 22 is connected to the other end of the mounting block 15 inside the moving support frame 12 with an outlet hose 211, which is also used here to match the mobility of the mounting block 15 inside the moving support frame 12; the oil passage 23 inside the fixed arc plate 21 is connected to the other end of the outer arc surface of the fixed support frame 11 with an outlet pipe 212. Both the outlet hose 211 and the outlet pipe 212 are used to connect to external oil storage equipment to collect the oil flowing through the oil passage 23; similarly, the outlet pipe 212 can also adopt a rigid pipe structure and a hose structure.

[0037] Further preferred, such as Figure 4 As shown, the inlet end of the liquid pump 25 is connected to two main oil supply pipes 28, and each main oil supply pipe 28 is connected to a pair of auxiliary oil supply pipes 29. Each auxiliary oil supply pipe 29 is equipped with a liquid valve 210. One of each pair of auxiliary oil supply pipes 29 is used to connect to an external hot oil supply device, and the other is used to connect to an external cold oil supply device.

[0038] With this design, by controlling the opening and closing of the liquid valve 210, hot oil can also be introduced into the oil passage 23 through the liquid pump 25. The hot oil is used to assist the heating tube 32 in heating the capacitor core and can also play a heat preservation role during the hot pressing process.

[0039] Preferred, such as Figure 1 As shown, the upper four sides of the fixed bearing frame 11, the lower four sides of the movable bearing frame 12, and the inner wall of the semi-circular opening 14 are all provided with a first sealing strip 213. The two sides of the fixed arc plate 21 and the two sides of the movable arc plate 22 are all provided with a second sealing strip 214. The sides of the clamping plate 3 are all provided with a third sealing strip 322. In this example, the first sealing strip 213, the second sealing strip 214, and the third sealing strip 322 can all be made of rubber.

[0040] With this design, the first sealing strip 213 is used to ensure the airtightness of the contact surface between the fixed bearing frame 11, the moving bearing frame 12 and the vacuum tube 13, so that the space between the fixed arc plate 21 and the moving arc plate 22 is completely sealed, which facilitates the formation of high vacuum conditions; the second sealing strip 214 is used to ensure the airtightness of the contact surface between the fixed arc plate 21 and the moving arc plate 22; and the third sealing strip 322 is used to ensure the airtightness of the side of the clamping plate 3 and the contact surface between the fixed arc plate 21 and the moving arc plate 22, thereby completely sealing the space between the clamping plates 3, which facilitates the maintenance of high vacuum conditions.

[0041] Preferred, such as Figure 3 As shown, rectangular corrugated rings 16 are installed between the four sides of the upper surface of the mounting block 15 inside the moving support frame 12 and the four sides of the upper surface of the moving support frame 12.

[0042] With this design, since the four sides of the mounting block 15 inside the fixed support frame 11 are directly fixed to the four inner walls of the fixed support frame 11, the fixed support frame 11 and the mounting block 15 are airtight. However, since the four sides of the mounting block 15 inside the moving support frame 12 need to slide in contact with the four inner walls of the moving support frame 12, there is a possibility of air leakage between the moving support frame 12 and the mounting block 15. Here, by setting the rectangular corrugated ring 16, even if there is a gap large enough for air leakage between the moving support frame 12 and the mounting block 15, the rectangular corrugated ring 16 and the inner wall of the moving support frame 12 still form an airtight sealed space, preventing external leakage. The ambient gas enters the vacuum space; at the same time, the rectangular corrugated ring 16 itself has the property of being stretchable, which can adapt to the relative movement between the mounting block 15 and the moving support frame 12. Therefore, only the mounting block 15 needs to be driven. During the process when the capacitor core is not in contact with the moving arc plate 22 and during the pre-pressing process, the moving support frame 12 moves with the mounting block 15 through the rectangular corrugated ring 16. During the fine pressing process, the moving support frame 12 is restricted by the fixed support frame 11 and no longer moves with the mounting block 15. Instead, the rectangular corrugated ring 16 is stretched. Therefore, there is no need to set up a separate driving structure for the moving support frame 12, which simplifies the overall structure of the device.

[0043] Preferred, such as Figure 4 As shown, a first support frame 17 is provided on the base plate 4, and a hydraulic cylinder 18 with a driving direction parallel to the height direction is provided on the first support frame 17. The driving axis of the hydraulic cylinder 18 is connected downward to the mounting block 15 in the moving support frame 12, and the hydraulic cylinder 18 is used to drive the mounting block 15 to move along the height direction.

[0044] Preferred, such as Figure 3As shown, two air supply pipes 19 are connected to both ends of the fixed bearing frame 11. Each air supply pipe 19 is equipped with an air valve 110. The two air supply pipes 19 located at different ends of the fixed bearing frame 11 are connected to the external environment. The other two air supply pipes 19 located at different ends of the fixed bearing frame 11 are connected to the external cold air supply equipment. The air supply pipes 19 are all located above the fixed arc plate 21.

[0045] With this design, when the capacitor core needs to be cooled and shaped, the air valves 110 on the two air supply pipes 19 connected to the external environment can be opened first to restore the normal air pressure in the sealed space between the two opposing sides of the clamping plates 3. Then, the air valves 110 on the two air supply pipes 19 connected to the cold air supply equipment can be opened to continuously supply cold air into the sealed space between the two opposing sides of the clamping plates 3 through the external cold air supply equipment. The cold air exchanges heat with the clamping plates 3 at this high temperature, thereby reducing the temperature in the sealed space between the two clamping plates 3 and further improving the cooling speed of the capacitor core. At the same time, the cold air continuously supplied into the sealed space between the two opposing sides of the clamping plates 3 will be output from the two air supply pipes 19 connected to the external environment after exchanging heat with the clamping plates 3, thereby improving the flow of cold air.

[0046] Preferred, such as Figure 5 and Figure 6 As shown, a pair of first mounting brackets 34 are provided above the base plate 4. Each of the first mounting brackets 34 has a sliding rod 35 along the height direction. Each sliding rod 35 is slidably fitted with a sliding sleeve 36. A spring 37 is connected between the sliding sleeve 36 and the lower end of the first mounting bracket 34. The springs 37 are coaxially fitted around the corresponding sliding rod 35. Each sliding sleeve 36 is connected to a connecting plate 38. The connecting plates 38 are respectively connected to the support tube 33. When the spring 37 is in its original state, the clamping plate 3 is located above the fixed bearing frame 11. The first mounting brackets 34 are all movable along the length direction and the width direction.

[0047] With this design, the movement of the first mounting bracket 34 is used to drive the clamping plate 3 to move along the width direction and adjust the spacing of the clamping plates 3. Furthermore, by setting the spring 37, it is not necessary to set a separate drive mechanism for the movement of the clamping plate 3 along the height direction. Through the contact between the semi-circular opening 14 and the support tube 33, the moving bearing frame 12 can move downward with the support tube 33, at which time the spring 37 is compressed. It is worth noting that the stiffness coefficient of the rectangular corrugated ring 16 is much greater than that of the spring 37, so the compression of the spring 37 will not cause a large-distance compression of the rectangular corrugated ring 16. After the hot pressing is completed, the moving bearing frame 12 separates from the fixed bearing frame 11 and moves upward. At this time, the spring 37 returns to its original state and drives the clamping plate 3 to move upward.

[0048] Preferred, such as Figure 7As shown, a second mounting bracket 39 is provided above the base plate 4. A fixing block 310 is provided in the middle of the second mounting bracket 39. A screw 311 is rotatably provided on the second mounting bracket 39 along the length direction. The screw 311 rotatably passes through the fixing block 310, and the portions of the screw 311 on both sides of the fixing block 310 rotate in opposite directions. A first rotating motor 312 is provided on the second mounting bracket 39. The drive shaft of the first rotating motor 312 is coaxially connected to the screw 311. The portions of the screw 311 on both sides of the fixing block 310 are threaded with a first mating thread. The first mating block 313 and the first mounting block 313 are in sliding contact with the second mounting bracket 39. The first mating block 313 is connected to the first mounting bracket 34. The base plate 4 is provided with a second bearing bracket 314. The second bearing bracket 314 is provided with a third mounting bracket 315. The third mounting bracket 315 is provided with an electric screw 316 along the width direction. The electric screw 316 is threadedly engaged with a second mating block 317. The second mating block 317 is in sliding contact with the second bearing bracket 314. The second mounting bracket 39 is connected to the second mating block 317. With this design, the first rotating motor 312 drives the screw 311 to rotate, which in turn drives the second mounting bracket 39 to move through the first mating block 313, so as to adjust the spacing of the clamping plate 3; the electric lead screw 316 drives the second mating block 317 to move, which in turn drives the second mounting bracket 39 to move, which in turn drives the clamping plate 3 to move along the width direction.

[0049] Preferred, such as Figure 7 As shown, a conveyor belt 318 is provided on the base plate 4. The conveyor belt 318 is located between the fixed support frame 11 and the second support frame 314, and its conveying direction is parallel to the length direction. The conveyor belt 318 is used to convey capacitor cores, and the central axis of the capacitor cores placed on the conveyor belt 318 is parallel to the length direction. Two third support frames 319 are provided on the base plate 4. Each third support frame 319 is provided with a linear cylinder 320 whose driving direction is parallel to the height direction of the fixed support frame 11. The drive shaft of the linear cylinder 320 is vertically connected to a lower pressure bar 321. When the clamping plate 3 moves to directly above the conveyor belt 318, the lower pressure bar 321 is located above the connecting plate 38, and the linear cylinder 320 is used to drive the lower pressure bar 321 to move downward.

[0050] With this design, by moving the clamping plate 3 directly above the conveyor belt 318, the lower pressure bar 321 moves downward, contacting the connecting plate 38 and causing the connecting plate 38 and clamping plate 3 to move downward. At this time, the spring 37 is compressed. When the clamping plates 3 are located outside both ends of the capacitor core on the conveyor belt 318, the spacing of the clamping plates 3 is adjusted so that the clamping plates 3 clamp the capacitor core. Then, the lower pressure bar 321 is moved upward, and the spring 37 drives the connecting plate 38 and clamping plate 3 to rise. At this time, the clamping plates 3 can be driven to move the capacitor core. The subsequent flat core hot pressing operation: After the flat core hot pressing is completed, the clamping plate 3 holding the capacitor core is moved to directly above the conveyor belt 318, and the lower pressure bar 321 is moved downward again. When the capacitor core approaches or contacts the conveyor belt 318, the spacing of the clamping plate 3 is adjusted, and the capacitor core is placed on the conveyor belt 318. The capacitor core can then be carried to the next process by the conveyor belt 318. The use of the conveyor belt 318 and the lower pressure bar 321 for loading and unloading the capacitor core greatly improves the automation level of the device.

[0051] 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 hot pressing device for flat cores of flexible straight capacitors, characterized in that, include: The bearing mechanism includes a fixed bearing frame (11) and a movable bearing frame (12). The fixed bearing frame (11) is mounted on a base plate (4) and connected to a vacuum tube (13). The movable bearing frames (12) are arranged parallel to each other above the fixed bearing frame (11) and the spacing is adjustable. The cross-sectional dimensions of the movable bearing frame (12) and the fixed bearing frame (11) are matched in the height direction. The center of the upper two ends of the fixed bearing frame (11) and the center of the lower two ends of the movable bearing frame (12) are both connected to a semi-circular opening (14) along the length direction of the fixed bearing frame (11). The mold mechanism includes a fixed arc plate (21) and a movable arc plate (22) with semi-elliptical cross sections and matching dimensions. The central axes of the fixed arc plate (21) and the movable arc plate (22) are parallel to the length direction. The fixed arc plate (21) is located inside the fixed support frame (11) with its inner arc surface facing upward. Its two sides are flush with and connected to the two sides of the upper part of the fixed support frame (11), and its two ends are connected to the inner walls of the two ends of the fixed support frame (11). The movable arc plate (22) is moved along the height direction and located inside the movable support frame (12) with its inner arc surface facing downward. Its four sides are in sliding contact with the inner wall of the movable support frame (12). Both the fixed arc plate (21) and the movable arc plate (22) are embedded with serpentine oil passages (23). The vacuum tube (13) is located above the inner arc surface of the fixed arc plate (21). The clamping mechanism includes a pair of clamping plates (3) whose dimensions match the inner arc surface of the fixed arc plate (21) and are arranged parallel to each other along the length direction with adjustable spacing. The clamping plates (3) are all movable along the height direction and the width direction of the fixed arc plate (21). Their opposite surfaces are provided with mounting grooves (31) inward. Each mounting groove (31) is provided with a heating tube (32). The opposite sides of the clamping plates (3) are coaxially connected with a support tube (33) whose dimensions match the semi-circular opening (14).

2. The flexible straight capacitor flat core hot pressing device according to claim 1, characterized in that, Both the fixed support frame (11) and the movable support frame (12) are equipped with mounting blocks (15). The four sides of the mounting block (15) in the fixed support frame (11) are fixed to the four inner walls of the fixed support frame (11), and the four sides of the mounting block (15) in the movable support frame (12) are in sliding contact with the four inner walls of the fixed support frame (11). The opposite sides of the two mounting blocks (15) are provided with arc-shaped surfaces that extend inward. The arc-shaped surfaces extend through both ends of the mounting blocks (15) along the length of the fixed support frame (11). The outer arc surfaces and both end faces of the fixed arc plate (21) and the movable arc plate (22) are covered with heat insulation plates (24). The outer walls of the two sides are respectively attached to the arc surface. The heat insulation plate (24) on the fixed arc plate (21) is fixed at both ends to the inner wall of the fixed bearing frame (11). The heat insulation plate (24) on the moving arc plate (22) slides in contact with the inner wall of the moving bearing frame (12). The oil pipe (23) located in the fixed arc plate (21) passes through the corresponding heat insulation plate (24), the mounting block (15) and the fixed bearing frame (11) to the outer arc surface of the fixed bearing frame (11). The oil pipe (23) located in the moving arc plate (22) passes through the corresponding heat insulation plate (24) and the mounting block (15) to the upper surface of the mounting block (15).

3. The flexible straight capacitor flat core hot pressing device according to claim 2, characterized in that, Two liquid pumps (25) are installed on the base plate (4). The outlet end of one liquid pump (25) is connected to an oil inlet hose (26). The oil inlet hose (26) is connected to one end of the oil passage (23) in the moving arc plate (22) on the upper surface of the mounting block (15) in the moving support frame (12). The outlet end of the other liquid pump (25) is connected to an oil inlet pipe (27). The oil inlet pipe (27) is connected to one end of the oil passage (23) in the fixed arc plate (21) on the outer side of the fixed support frame (11). The inlet ends of the liquid pumps (25) are connected to two main oil supply pipes (28). Each main oil supply pipe (28) is connected to a pair of auxiliary oil supply pipes (29). Each of the oil transfer sub-pipes (29) is equipped with a liquid valve (210). One of each pair of oil transfer sub-pipes (29) is used to connect to the external hot oil supply equipment, and the other is used to connect to the external cold oil supply equipment. The oil passage (23) in the moving arc plate (22) is connected to the other end of the mounting block (15) in the moving support frame (12) with an oil outlet hose (211). The oil passage (23) in the fixed arc plate (21) is connected to the other end of the outer side of the fixed support frame (11) with an oil outlet pipe (212). Both the oil outlet hose (211) and the oil outlet pipe (212) are used to connect to the external oil storage equipment.

4. The flexible straight capacitor flat core hot pressing device according to claim 2, characterized in that, The upper four sides of the fixed bearing frame (11), the lower four sides of the movable bearing frame (12) and the inner wall of the semi-circular opening (14) are all provided with a first sealing strip (213), the two sides of the fixed arc plate (21) and the two sides of the movable arc plate (22) are all provided with a second sealing strip (214), and the side of the clamping plate (3) is provided with a third sealing strip (322).

5. The flexible straight capacitor flat core hot pressing device according to claim 2, characterized in that, A rectangular corrugated ring (16) is installed between the four sides of the upper surface of the mounting block (15) inside the moving load frame (12) and the four sides of the upper surface of the moving load frame (12).

6. The flexible straight capacitor flat core hot pressing device according to claim 2, characterized in that, The base plate (4) is provided with a first support frame (17), and the first support frame (17) is provided with a hydraulic cylinder (18) whose driving direction is parallel to the height direction. The driving axis of the hydraulic cylinder (18) is connected downward to the mounting block (15) in the moving support frame (12).

7. The flexible straight capacitor flat core hot pressing device according to claim 1, characterized in that, Two gas pipes (19) are connected to both ends of the fixed bearing frame (11). Each gas pipe (19) is equipped with a gas valve (110). The two gas pipes (19) located at different ends of the fixed bearing frame (11) are connected to the external environment. The other two gas pipes (19) located at different ends of the fixed bearing frame (11) are connected to the external cold air supply equipment. The gas pipes (19) are all located above the fixed arc plate (21).

8. The flexible straight capacitor flat core hot pressing device according to claim 1, characterized in that, A pair of first mounting brackets (34) are provided above the base plate (4). Each of the first mounting brackets (34) is provided with a sliding rod (35) along the height direction. Each sliding rod (35) is slidably fitted with a sliding sleeve (36). Each sliding sleeve (36) is connected to the lower end of the first mounting bracket (34) and the spring (37) is coaxially fitted around the corresponding sliding rod (35). Each sliding sleeve (36) is connected to a connecting plate (38). The connecting plate (38) is connected to the support tube (33). When the spring (37) is in its original state, the clamping plate (3) is located above the fixed bearing frame (11). The first mounting brackets (34) are all moved along the length direction and the width direction.

9. The flexible straight capacitor flat core hot pressing device according to claim 8, characterized in that, A second mounting bracket (39) is provided above the base plate (4). A fixing block (310) is provided in the middle of the second mounting bracket (39). A screw (311) is rotatably provided on the second mounting bracket (39) along the length direction. The screw (311) is rotatably passed through the fixing block (310), and the parts of the screw (311) on both sides of the fixing block (310) rotate in opposite directions. A first rotating motor (312) is provided on the second mounting bracket (39). The drive shaft of the first rotating motor (312) is coaxially connected to the screw (311). The parts of the screw (311) on both sides of the fixing block (310) are threaded with a first mating block. (313), the first mating block (313) is in sliding contact with the second mounting bracket (39), the first mating block (313) is connected to the first mounting bracket (34), the base plate (4) is provided with a second bearing bracket (314), the second bearing bracket (314) is provided with a third mounting bracket (315), the third mounting bracket (315) is provided with an electric screw (316) along the width direction, the electric screw (316) is threadedly engaged with a second mating block (317), the second mating block (317) is in sliding contact with the second bearing bracket (314), and the second mounting bracket (39) is connected to the second mating block (317).

10. The flexible straight capacitor flat core hot pressing device according to claim 8, characterized in that, A conveyor belt (318) is provided on the base plate (4). The conveyor belt (318) is located between the fixed bearing frame (11) and the second bearing frame (314) and its conveying direction is parallel to the length direction. Two third bearing frames (319) are provided on the base plate (4). Each of the third bearing frames (319) is provided with a linear cylinder (320) whose driving direction is parallel to the height direction of the fixed bearing frame (11). The drive shaft of the linear cylinder (320) is vertically connected to a lower pressure bar (321). When the clamping plate (3) moves to directly above the conveyor belt (318), the lower pressure bar (321) is located above the connecting plate (38).

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