Annular vacuum furnace

Abstract

The present invention provides an annular vacuum furnace, which relates to the technical field of vacuum furnaces. The annular vacuum furnace includes a furnace body, four groups of detection devices for confirming the placement position of superconducting coils, and a processing host for receiving and processing detection signals of the detection devices. In the present invention, the top cross-section of the furnace body can be any one of a circular ring and a D-shaped ring. This structure greatly reduces the cost of equipment materials. The superconducting coil is lifted to the mouth of the furnace body by a lifting device, and the distance between the superconducting coil and the inner wall of the outer shell is detected by four groups of infrared distance sensors. The processing host obtains the distance information respectively, determines the group with the closest distance, and feeds back the signal to the first microcomputer controller of the group. The first microcomputer controller controls the indicator light to light up, and the position of the superconducting coil can be adjusted according to the information until the distances detected by the four groups of infrared distance sensors are observed to be basically consistent through the display screen. The superconducting coil can then be lowered onto the spacer block by the lifting device.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum furnaces, in particular to an annular vacuum furnace. Background Art

[0002] The China Fusion Engineering Test Reactor (CFETR) is a tokamak experimental facility designed and built independently by China. The CFETR's magnet system primarily consists of a longitudinal field (TF), a poloidal field (PF), and a central solenoid (CS). The TF superconducting coil, shaped like a capital D, generates a toroidal field to confine the plasma, while the PF poloidal field coil is donut-shaped.

[0003] After being wound and formed, the above-mentioned large superconducting coils need to undergo a certain amount of heat treatment to cause a solid-state diffusion reaction, thereby generating a superconducting phase. Heat treatment is a key technology in the manufacture of superconducting coils, and the quality of heat treatment will directly determine the superconducting performance of the future coils.

[0004] At present, there is no heat treatment furnace designed for such large superconducting coils at home and abroad. Figure 7 and Figure 8 The conventional vacuum heat treatment furnace shown above is currently used for large superconducting coil heat treatment equipment and needs to overcome the following difficulties:

[0005] 1. The utilization rate of traditional vacuum furnaces is very low when processing large superconducting coils, such as D-shaped rings or circular rings. The internal circular area of the large superconducting coil is actually a huge waste, and the cost of equipment materials, vacuuming, heating, and atmosphere are all high;

[0006] 2. When processing large superconducting coils, it is difficult for traditional vacuum furnaces to place large superconducting coils in the center, which can easily lead to local overheating and uneven heating overall. Summary of the Invention

[0007] (1) Technical problems solved

[0008] In response to the shortcomings of the existing technology, the present invention provides a ring-shaped vacuum furnace, which solves the problems that the traditional vacuum furnace has very low utilization rate when processing large superconducting coils and it is difficult to place the large superconducting coils in a central position when processing large superconducting coils.

[0009] (2) Technical solution

[0010] To achieve the above objectives, the present invention is implemented through the following technical solutions: an annular vacuum furnace, comprising a furnace body, four groups of detection devices for confirming the placement position of the superconducting coil, and a processing host for receiving and processing the detection signals of the detection devices, the furnace body being composed of a bottom support, an outer shell, an inner shell and an upper cover, the outer shell and the inner shell being fixedly connected to the upper wall of the bottom support and the inner shell being located inside the outer shell, the upper cover being arranged at the upper ends of the outer shell and the inner shell, the lower wall of the bottom support being fixedly connected to a plurality of groups of feet, the lower wall of the bottom support being penetrated by four groups of air inlet pipes, the four groups of the air inlet pipes being distributed in four equal parts on the lower wall of the bottom support, the upper wall of the upper cover being penetrated by eight groups of exhaust pipes, the eight groups of the exhaust pipes being equally distributed in the form of two inner and outer circles on the upper wall of the upper cover, the inner side wall of the bottom support being fixedly connected to a plurality of groups of partitions from bottom to top, the upper wall of the bottom support being fixedly connected to a support plate located between the outer shell and the inner shell, the inner wall of the support plate being provided with a plurality of groups of air inlet pipes which are penetrated up and down Hole, multiple groups of spacers are fixedly connected to the upper wall of the support plate, and multiple groups of spacers are equally distributed in a circle with the center of the support plate as the center of the circle, and radiation screens are fixedly connected between the opposite sides of the outer shell and the inner shell, and cavities are respectively provided between the two groups of radiation screens and the outer shell and the inner shell, and multiple groups of heaters are fixedly connected to the inner walls of the two cavities, and the four groups of detection devices are composed of a fixed plate and a front shell tightened by hand screws, and a detection structure for detecting the edge distance is provided on the inner wall of the front shell, and a control component for sending, receiving and processing signals is provided between the front shell and the processing host, and a power supply structure for power supply is also provided between the front shell and the processing host, a circular bubble level and a reminder structure for luminous reminders are fixedly connected to the upper wall of the front shell, and a display screen for displaying information is fixedly connected to the front wall of the processing host, and the display screen, detection structure, control component and reminder structure are all electrically connected to the power supply structure.

[0011] Preferably, the cross-section of the furnace body when viewed from above may be any one of a circular ring shape and a D-shaped ring shape.

[0012] Preferably, a buffer cavity is formed between the plurality of groups of partitions, the inner walls of the plurality of groups of partitions are provided with a plurality of groups of through holes that pass through the upper and lower parts, and the positions of the through holes on the partitions of the two adjacent groups are staggered.

[0013] Preferably, the detection structure includes an infrared distance sensor and a detection window. The detection window is arranged on the side of the front shell away from the fixed plate and close to the lower end. The infrared distance sensor is fixedly connected to the lower inner wall of the front shell and the detection head part corresponds to the position of the detection window.

[0014] Preferably, the control component includes a first microcomputer controller and a second microcomputer controller, and the first microcomputer controller and the second microcomputer controller are respectively arranged inside the front shell and inside the processing host, and the first microcomputer controller and the second microcomputer controller are both integrated with a wireless transceiver module.

[0015] Preferably, the power supply structure includes a first battery pack and a second battery pack, the first battery pack is arranged inside the front shell and between the control component and the detection structure, and the second battery pack is arranged on the inner wall of the processing host.

[0016] Preferably, the reminder structure is a warning light, which is fixedly connected to the upper wall of the front shell and located on one side of the circular bubble level.

[0017] Preferably, the four groups of fixing plates are each provided with an adhesive layer on one side away from the front shell, and the adhesive layer is a double-sided adhesive.

[0018] (3) Beneficial effects

[0019] The present invention provides an annular vacuum furnace having the following beneficial effects:

[0020] 1. Compared with the existing technology, the cross-section of the annular vacuum furnace can be any of a circular ring and a D-shaped ring when viewed from above. When working, the superconducting coil is lowered into the furnace body by a lifting device. This structure greatly reduces the cost of equipment materials, vacuuming, heating, atmosphere, etc.

[0021] 2. Compared with the existing technology, the annular vacuum furnace fixes four groups of detection devices on the four sides of the superconducting coil through an adhesive layer, and by loosening the hand screws and observing the bubbles on the circular bubble level, the front shell is in the vertical and horizontal planes, and the superconducting coil is lifted to the mouth of the furnace body by the lifting equipment. The infrared distance sensors on the four groups of detection devices detect the distance between the inner wall of the shell, and the detection signals are sent to the processing host through the first microcomputer controller. The processing host obtains the signals sent by the four groups of first microcomputer controllers respectively, and the specific distance information is displayed on the display screen. After processing and identification, the group with the closest distance is determined, and the feedback signal is transmitted to the first microcomputer controller of the group through the second microcomputer controller. The first microcomputer controller controls the indicator light to light up. The staff can adjust the position of the superconducting coil according to the information until it is observed through the display screen that the distances detected by the four groups of infrared distance sensors are basically the same, and the superconducting coil can be lowered to the spacer by the lifting equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 Schematic diagram of the structure of the detection device of the present invention;

[0024] Figure 3 This is a partial schematic diagram of the internal structure of the front shell of the present invention;

[0025] Figure 4 This is a partial cross-sectional view of the internal structure of the processing host of the present invention;

[0026] Figure 5 It is a partial cross-sectional view of the internal structure of the furnace body of the present invention;

[0027] Figure 6 This is a top view of the furnace structure when the superconducting coil of the present invention is placed inside the furnace;

[0028] Figure 7 This is a schematic diagram of a traditional D-shaped superconducting coil vacuum furnace equipment;

[0029] Figure 8 Schematic diagram of traditional toroidal superconducting coil vacuum furnace equipment.

[0030] Among them, 1. base; 2. bottom support; 3. outer shell; 4. inner shell; 5. upper cover; 6. air inlet pipe; 7. exhaust pipe; 8. processing host; 9. display screen; 10. fixing plate; 11. front shell; 12. hand screws; 13. detection window; 14. circular bubble level; 15. prompt light; 16. adhesive layer; 17. infrared distance sensor; 18. first battery pack; 19. first microcomputer controller; 20. partition; 21. support plate; 22. air inlet; 23. spacer; 24. radiation screen; 25. heater; 26. second microcomputer controller; 27. second battery pack. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Example:

[0033] like Figures 1 to 6 As shown, an embodiment of the present invention provides an annular vacuum furnace, comprising a furnace body, four sets of detection devices for confirming the placement position of superconducting coils, and a processing host 8 for receiving and processing detection signals of the detection devices;

[0034] The furnace body is composed of a bottom support 2, an outer shell 3, an inner shell 4 and an upper cover 5. The outer shell 3 and the inner shell 4 are fixedly connected to the upper wall of the bottom support 2 and the inner shell 4 is located inside the outer shell 3. The upper cover 5 is arranged on the upper ends of the outer shell 3 and the inner shell 4. The lower wall of the bottom support 2 is fixedly connected to multiple groups of feet 1. Four groups of air intake pipes 6 are provided through the lower wall of the bottom support 2. The four groups of air intake pipes 6 are distributed in four equal parts on the lower wall of the bottom support 2. Eight groups of exhaust pipes 7 are provided through the upper wall of the upper cover 5. The eight groups of exhaust pipes 7 are distributed in equal parts on the upper wall of the upper cover 5 in the form of two inner and outer circles. The cross-section of the furnace body can be any one of a circular ring and a D-shaped ring when viewed from above. The middle parts of the circular ring and the D-shaped ring furnace bodies are hollow, which greatly reduces the cost of furnace materials, as well as the costs of vacuuming, heating and atmosphere. This embodiment adopts a circular ring shape for expansion description;

[0035] The inner wall of the bottom support 2 is fixedly connected with multiple groups of partitions 20 from bottom to top, and the upper wall of the bottom support 2 is fixedly connected with a support plate 21 between the outer shell 3 and the inner shell 4. The inner wall of the support plate 21 is provided with multiple groups of air inlet holes 22 that pass through from top to bottom. The upper wall of the support plate 21 is fixedly connected with multiple groups of spacers 23. The multiple groups of spacers 23 are equally distributed on the circumference with the center of the support plate 21 as the center. A buffer cavity is formed between the multiple groups of partitions 20. The inner walls of the multiple groups of partitions 20 are provided with multiple groups of through holes that pass through from top to bottom, and the positions of the through holes on the partitions 20 of the upper and lower adjacent groups are staggered. The protective gas enters from the air inlet pipe 6 between the bottom support 2 and the lowermost group of the multiple groups of partitions 20, and enters the buffer cavity of the upper layer along the through holes on the partition 20. The airflow is buffered by the multiple groups of buffer cavities to stabilize the airflow, and then enters the interior of the furnace through the multiple groups of air inlet holes 22, which can greatly avoid the problem of direct entry of the protective gas causing vortex flow inside the furnace;

[0036] A radiation screen 24 is fixedly connected between the outer shell 3 and the inner shell 4 on opposite sides. A cavity is set between the two sets of radiation screens 24 and the outer shell 3 and the inner shell 4 respectively. Multiple sets of heaters 25 are fixedly connected to the inner side walls of the two cavities. Another advantage of setting the furnace body in a ring shape is that heaters 25 can be set on opposite sides of the outer shell 3 and the inner shell 4 of the furnace body, which has a better heating effect, uniform heating inside and outside, and ensures the superconducting performance of the coil.

[0037] The four sets of detection devices are each composed of a fixing plate 10 and a front shell 11 that are tightened by hand screws 12. An adhesive layer 16 is provided on the side of the four fixing plates 10 away from the front shell 11. The adhesive layer 16 is a double-sided adhesive. The double-sided adhesive allows the detection device to be attached to the outer wall of the superconducting coil. After the superconducting coil is deployed, the detection device can also be easily removed.

[0038] The inner wall of the front shell 11 is provided with a detection structure for detecting the edge distance. The detection structure includes an infrared distance sensor 17 and a detection window 13. The detection window 13 is set through the side of the front shell 11 away from the fixed plate 10 and close to the lower end. The infrared distance sensor 17 is fixedly connected to the inner lower wall of the front shell 11, and the detection head portion corresponds to the position of the detection window 13. After the four sets of detection devices are all pasted around the superconducting coil, the hoisting equipment hoists the superconducting coil to the furnace mouth, and the distance between it and the inner wall of the outer shell 3 is detected by the four sets of infrared distance sensors 17;

[0039] A control component for transmitting, receiving and processing signals is provided between the front shell 11 and the processing host 8. The control component includes a first microcomputer controller 19 and a second microcomputer controller 26. The first microcomputer controller 19 and the second microcomputer controller 26 are respectively provided inside the front shell 11 and inside the processing host 8. The first microcomputer controller 19 and the second microcomputer controller 26 are both integrated with a wireless transceiver module. The first microcomputer controller 19 transmits the four groups of distance signals detected by the four groups of infrared distance sensors 17 to the second microcomputer controller 26. The second microcomputer controller 26 calculates and identifies the size of the distance and displays the information on the display screen 9. At the same time, the group of information with the smallest distance is transmitted back to the first microcomputer controller 19 of the group.

[0040] A power supply structure for power supply is also provided between the front shell 11 and the processing host 8. The power supply structure includes a first battery group 18 and a second battery group 27. The first battery group 18 is arranged inside the front shell 11 and is located between the control component and the detection structure. The second battery group 27 is arranged on the inner wall of the processing host 8. By arranging the first battery group 18 and the second battery group 27, the detection device and the processing host 8 can operate wirelessly.

[0041] A circular bubble level 14 and a reminder structure for luminous reminders are fixedly connected to the upper wall of the front shell 11. A display screen 9 for displaying information is fixedly connected to the front wall of the processing host 8. The display screen 9, the detection structure, the control component and the reminder structure are all electrically connected to the power supply structure. The reminder structure is a reminder light 15. The reminder light 15 is fixedly connected to the upper wall of the front shell 11 and is located on one side of the circular bubble level 14. The circular bubble level 14 is used to correct the installation angle. The first microcomputer controller 19 that receives the group of information with the smallest distance controls the group of reminder lights 15 to light up, so that the staff can quickly know the position information of the superconducting coil, and thus can control the lifting equipment to make corresponding movement adjustments until the four groups of distances are consistent as displayed on the display screen 9, and then the superconducting coil can be dropped. At this time, the superconducting coil must be in the center position.

[0042] Working principle: The cross-section of the furnace body can be any of a circular ring or a D-shaped ring when viewed from above. The middle parts of the circular ring and the D-shaped ring furnace bodies are hollow, which greatly reduces the material cost of the furnace body, as well as the cost of vacuuming, heating and atmosphere. The protective gas enters from the air inlet pipe 6 between the bottom support 2 and the lowest group of multiple groups of partitions 20, and enters the buffer cavity of the upper layer along the through holes on the partition 20. The airflow is buffered by multiple groups of buffer cavities to stabilize the airflow, and then enters the interior of the furnace body through multiple groups of air inlet holes 22, which can greatly avoid the problem of direct entry of the protective gas causing vortex flow inside the furnace body. Multiple groups of heaters 25 are fixedly connected to the inner walls of the two cavities. The internal and external heating makes the superconducting coil heated evenly, and the superconducting performance of the coil is guaranteed. The adhesive layer 16 is a double-sided adhesive. The detection device can be attached to the outer wall of the superconducting coil through the double-sided adhesive, and the detection device can be easily removed after the superconducting coil is placed. When the four groups of detection devices are attached to the four sides of the superconducting coil After a week, the lifting equipment lifts the superconducting coil to the mouth of the furnace body, and detects the distance between it and the inner wall of the shell 3 through four groups of infrared distance sensors 17. The first microcomputer controller 19 transmits the four groups of distance signals detected by the four groups of infrared distance sensors 17 to the second microcomputer controller 26. The second microcomputer controller 26 calculates and identifies the size of the distance, and displays the information on the display screen 9. At the same time, the group of information with the smallest distance is transmitted back to the first microcomputer controller 19 of the group. The circular bubble level 14 is used to correct the installation angle. The first microcomputer controller 19 that receives the group of information with the smallest distance controls the group of prompt lights 15 to light up, so that the staff can quickly know the position information of the superconducting coil, and can control the lifting equipment to make corresponding movement adjustments until the four groups of distances are consistent on the display screen 9, and then it can be dropped. By setting the first battery group 18 and the second battery group 27, the detection device and the processing host 8 can work wirelessly.

[0043] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An annular vacuum furnace comprising a furnace body, four sets of detection devices for confirming the placement position of superconducting coils, and a processing host (8) for receiving and processing detection signals of the detection devices, characterized in that: The furnace body is composed of a bottom support (2), an outer shell (3), an inner shell (4) and an upper cover (5). The outer shell (3) and the inner shell (4) are fixedly connected to the upper wall of the bottom support (2), and the inner shell (4) is located inside the outer shell (3). The upper cover (5) is arranged on the upper ends of the outer shell (3) and the inner shell (4). The lower wall of the bottom support (2) is fixedly connected to multiple groups of bottom feet (1). Four groups of air intake pipes (6) are arranged through the lower wall of the bottom support (2). The four groups of air intake pipes (6) are distributed in four equal parts on the lower wall of the bottom support (2). Eight groups of exhaust pipes (7) are provided through the wall, and the eight groups of exhaust pipes (7) are distributed equally on the upper wall of the upper cover (5) in the form of two inner and outer circles. The inner wall of the bottom support (2) is fixedly connected to multiple groups of partitions (20) from bottom to top. The upper wall of the bottom support (2) is fixedly connected to a support plate (21) between the outer shell (3) and the inner shell (4). The inner wall of the support plate (21) is provided with multiple groups of air inlet holes (22) that are through-through. The upper wall of the support plate (21) is fixedly connected to multiple groups of spacers (23). Multiple groups of spacers (23) are fixedly connected to the upper wall of the support plate (21). ) are equally distributed on the circumference with the center of the support plate (21) as the center of the circle, and a radiation screen (24) is fixedly connected between the opposite sides of the outer shell (3) and the inner shell (4). A cavity is set between the two groups of radiation screens (24) and the outer shell (3) and the inner shell (4), and multiple groups of heaters (25) are fixedly connected to the inner side walls of the two cavities. The four groups of detection devices are composed of a fixed plate (10) and a front shell (11) tightened by hand screws (12). The inner side wall of the front shell (11) is provided with a A detection structure, a control component for receiving and sending and processing signals is provided between the front shell (11) and the processing host (8), a power supply structure for powering is also provided between the front shell (11) and the processing host (8), a circular bubble level (14) and a reminder structure for luminous reminder are fixedly connected to the upper wall of the front shell (11), a display screen (9) for displaying information is fixedly connected to the front wall of the processing host (8), and the display screen (9), the detection structure, the control component and the reminder structure are all electrically connected to the power supply structure; A buffer cavity is formed between the plurality of groups of partitions (20), and the inner walls of the plurality of groups of partitions (20) are provided with a plurality of groups of through holes that penetrate vertically, and the positions of the through holes on the two adjacent groups of partitions (20) are in a staggered state.

2. The annular vacuum furnace according to claim 1, characterized in that: The cross section of the furnace body when viewed from above is in the shape of a circular ring or a D-shaped ring.

3. The annular vacuum furnace according to claim 2, characterized in that: The detection structure comprises an infrared distance sensor (17) and a detection window (13). The detection window (13) is arranged through the front shell (11) on a side away from the fixed plate (10) and close to the lower end. The infrared distance sensor (17) is fixedly connected to the inner lower wall of the front shell (11), and the detection head portion corresponds to the position of the detection window (13).

4. The annular vacuum furnace according to claim 3, characterized in that: The control component includes a first microcomputer controller (19) and a second microcomputer controller (26). The first microcomputer controller (19) and the second microcomputer controller (26) are respectively arranged inside the front shell (11) and inside the processing host (8). The first microcomputer controller (19) and the second microcomputer controller (26) are both integrated with a wireless transceiver module.

5. The annular vacuum furnace according to claim 4, characterized in that: The power supply structure comprises a first battery pack (18) and a second battery pack (27), wherein the first battery pack (18) is arranged inside the front shell (11) and between the control component and the detection structure, and the second battery pack (27) is arranged on the inner side wall of the processing host (8).

6. The annular vacuum furnace according to claim 5, characterized in that: The reminder structure is a reminder light (15), and the reminder light (15) is fixedly connected to the upper wall of the front shell (11) and is located on one side of the circular bubble level (14).

7. The annular vacuum furnace according to claim 6, characterized in that: The four groups of fixing plates (10) are each provided with an adhesive layer (16) on one side away from the front shell (11), and the adhesive layer (16) is a double-sided adhesive.

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