Superconducting induction heating device

Abstract

This invention discloses a superconducting induction heating device, characterized by comprising: a fixed base for fixing a workpiece; a superconducting magnet with a through hole in the center for the workpiece to be heated to pass through; and a rotation drive component mounted on the fixed base and connected to the superconducting magnet for driving the superconducting magnet to rotate, thereby heating the workpiece. By fixing the workpiece and heating it by rotating the superconducting magnet via the rotation drive component, it is convenient to measure the temperature on the surface and at both ends of the workpiece in real time, and to monitor the temperature difference between the workpiece surface and the core in real time. This allows for better control of the workpiece heating temperature and time, and compared to traditional superconducting induction heating devices, it can significantly reduce the equipment's footprint and cost.

Description

Technical Field

[0001] This invention relates to the field of superconducting induction heating technology, and specifically to a superconducting induction heating device. Background Technology

[0002] Traditional electromagnetic induction heating technology has been widely used in the steel processing industry due to its simple structure and environmental friendliness. However, when heating non-ferromagnetic materials such as aluminum or copper, the energy efficiency of the heater decreases significantly. Superconducting DC induction heating is an organic combination of superconducting power application technology and induction heating technology. It fully utilizes the low-loss characteristics of superconductivity in a DC environment, and combines it with electromagnetic induction technology to achieve preheating before aluminum extrusion in the aluminum processing industry. Compared with traditional AC induction heating technology, it has significant advantages in terms of energy efficiency and workpiece heating effect.

[0003] Patent CN202011402369.7 discloses an ultra-low frequency superconducting induction heating device and its process flow. The ultra-low frequency superconducting induction heating device includes a base, a driving device, a clamping device, and a heating device. The heating device includes an iron core and a superconducting coil. The superconducting coil is in a ring-shaped structure. The iron core is inserted through the center of the ring of the superconducting coil. The iron core forms a magnetic field placement space for placing a rotating workpiece. The workpiece rotates within the magnetic field placement space, forming eddy currents inside the workpiece to heat it.

[0004] Patent CN201821830607.2 discloses a dynamic demonstration device for a high-temperature superconducting DC induction heater, comprising a superconducting DC induction heater, wherein the DC induction heater includes a superconducting coil, a permanent magnet structure, a first coupling, a second coupling, an aluminum rod, a U-shaped support base, a support base, and a DC motor. The DC motor is used to drive the aluminum rod to rotate.

[0005] In both of the aforementioned patents, the superconducting induction heating devices heat the workpiece by rotating it. However, because the workpiece is constantly rotating, it is impossible to measure the temperature of the workpiece in real time, resulting in inaccurate temperature monitoring and an inability to accurately control the heating temperature and time of the workpiece. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention presents a superconducting induction heating device, comprising: a fixed base for fixing a workpiece; a superconducting magnet with a through hole in the center for the workpiece to be heated to pass through; and a rotation drive unit mounted on the fixed base and connected to the superconducting magnet for driving the superconducting magnet to rotate, thereby heating the workpiece.

[0007] Preferably, the superconducting magnet includes: a fixed cylinder with a through hole in the middle for the workpiece to be heated to pass through, and connected to a rotating drive component; and a superconducting coil installed inside the fixed cylinder.

[0008] Preferably, the fixing cylinder includes: a first sub-fixing cylinder with a through hole in the middle for the workpiece to be heated to pass through; a second sub-fixing cylinder disposed outside the first sub-fixing cylinder, with a superconducting coil installed between the first sub-fixing cylinder and the second sub-fixing cylinder; and a fixing plate for sealing the two ends of the first sub-fixing cylinder and the second sub-fixing cylinder, and connected to the rotary drive component.

[0009] Preferably, the superconducting magnet further includes a magnet skeleton, which includes: a skeleton support, installed inside a fixed cylinder; and a coil mounting bracket, installed on the skeleton support, for mounting the superconducting coil.

[0010] Preferably, the superconducting magnet further includes a cooling assembly, which includes: a refrigerator installed on the outside of the fixed cylinder; a connector connected to the refrigerator and extending to the inside of the fixed cylinder; and a cooling shield installed between the fixed cylinder and the magnet frame and connected to the connector for cooling the superconducting coil.

[0011] Preferably, at least two sets of superconducting coils are arranged along the axial direction of the fixed cylinder, with each set containing 2n superconducting coils. The 2n superconducting coils are arranged in pairs opposite each other and are uniformly distributed along the circumference of the fixed cylinder.

[0012] Preferably, the superconducting coil is made of high-temperature superconducting tape and has a circular or rectangular structure. During operation, opposite DC currents are applied to the two opposing superconducting coils to generate a horizontal magnetic field that is radially inward along the superconducting magnet.

[0013] Preferably, the fixing base includes: a support; a workpiece mounting component, mounted on the support for fixing the workpiece; and a drive component assembly, mounted on the support for mounting a rotary drive component to drive the superconducting magnet to reciprocate along the axial direction of the workpiece.

[0014] Preferably, the workpiece mounting component includes: a workpiece mounting base, mounted on a support; and a workpiece fixing rod, mounted on the workpiece mounting base, for clamping the workpiece.

[0015] Preferably, the drive component assembly includes: a movable guide rail mounted on the support for mounting the rotary drive component; and a movable drive component mounted on the support and connected to the rotary drive component for driving the superconducting magnet to reciprocate along the axial direction of the workpiece.

[0016] Compared with the closest prior art, the beneficial effects of the present invention are as follows: 1. The present invention adopts a method of fixing the workpiece and driving the superconducting magnet to rotate to heat the workpiece by rotating the drive component. This not only facilitates real-time temperature measurement on the surface and both ends of the workpiece, and real-time monitoring of the temperature difference between the workpiece surface and the core, but also enables better control of the workpiece heating temperature and time. Moreover, compared with traditional superconducting induction heating devices, it can significantly reduce the equipment footprint and equipment cost.

[0017] 2. This invention features at least two sets of superconducting coils arranged along the axial direction of the fixed cylinder, with each set containing 2n superconducting coils. The 2n superconducting coils are arranged in pairs facing each other, and the superconducting coils are circular or rectangular in structure. This arrangement not only allows for heating of the workpiece in a smaller area, but also allows the radially inward magnetic field generated by the superconducting magnet to directly act on the workpiece. Compared to traditional superconducting induction heating devices, the magnetic field generated by the superconducting magnet is stronger and more uniform, with less leakage magnetic field, a denser magnetic field, and higher heating efficiency. Moreover, under the same magnetic field conditions, the number of turns of the superconducting coil can be significantly reduced, the thickness of the superconducting coil can be reduced, and the size and weight of the superconducting magnet can be reduced (the diameter of the superconducting magnet can reach within 500mm-800mm), making it easier for the rotating drive component to rotate the superconducting magnet.

[0018] 3. The present invention can drive the superconducting magnet to reciprocate along the axial direction of the workpiece through the driving component assembly, thereby uniformly heating the workpiece. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the superconducting induction heating device of the present invention.

[0020] Figure 2 This is a schematic diagram of the first connection structure between the superconducting magnet and the rotating drive component of the present invention.

[0021] Figure 3 This is a schematic diagram of the second connection structure between the superconducting magnet and the rotating drive component of the present invention.

[0022] Figure 4 This is a schematic diagram of the first structure of the superconducting magnet of the present invention.

[0023] Figure 5 This is a schematic diagram of the second structure of the superconducting magnet of the present invention.

[0024] Figure 6 This is a schematic diagram of the structure of the fixed cylinder of the present invention.

[0025] Figure 7 This is a schematic diagram of the installation structure of the magnet frame of the present invention.

[0026] Figure 8 This is a schematic diagram of the structure of the magnet skeleton of the present invention.

[0027] Figure 9This is a schematic diagram of the installation structure of the refrigeration component of the present invention.

[0028] Figure 10 This is a schematic diagram of the structure of the refrigeration component of the present invention.

[0029] Figure label: 1-Superconducting magnet, 11-Fixed cylinder, 111-First sub-fixed cylinder, 112-Second sub-fixed cylinder, 113-Fixed plate, 12-Superconducting coil, 13-Magnet skeleton, 131-Skeleton support, 132-Coil fixing frame, 14-Refrigeration component, 141-Refrigeration machine, 142-Connector, 143-Cold shield, 2-Rotation drive component, 3-Support, 4-Workpiece mounting base, 5-Workpiece fixing rod, 6-Moving guide rail, 7-Moving drive component, 8-Workpiece. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0031] like Figures 1-10 As shown, this invention provides a superconducting induction heating device, comprising: a fixed base for fixing a workpiece 8; a superconducting magnet 1 with a through hole in the center for the workpiece 8 to pass through; and a rotation drive 2, mounted on the fixed base and connected to the superconducting magnet 1, for driving the superconducting magnet 1 to rotate, thereby heating the workpiece 8. By fixing the workpiece 8 and using the rotation drive 2 to rotate the superconducting magnet 1 to heat the workpiece 8, this method not only facilitates real-time temperature measurement on the surface and both ends of the workpiece 8, and real-time monitoring of the temperature difference between the surface and core of the workpiece 8, allowing for better control of the heating temperature and time, but also significantly reduces the footprint and cost compared to traditional superconducting induction heating devices.

[0032] In a preferred embodiment, the superconducting magnet 1 includes: a fixed cylinder 11 with a through hole in the middle for the workpiece 8 to be heated to pass through, and connected to the rotation drive 2; and a superconducting coil 12 installed inside the fixed cylinder 11.

[0033] In a preferred embodiment, the fixing cylinder 11 includes: a first sub-fixing cylinder 111 with a through hole in the middle for the workpiece 8 to be heated to pass through; a second sub-fixing cylinder 112 disposed outside the first sub-fixing cylinder 111, with the superconducting coil 12 installed between the first sub-fixing cylinder 111 and the second sub-fixing cylinder 112; and a fixing plate 113 symmetrically disposed at both ends of the first sub-fixing cylinder 111 and the second sub-fixing cylinder 112, used to close both ends of the first sub-fixing cylinder 111 and the second sub-fixing cylinder 112, and used to connect to the rotary drive component 2. The fixing cylinder 11 provides a vacuum environment for the superconducting coil 12.

[0034] In a preferred embodiment, the superconducting magnet 1 further includes a magnet skeleton 13, which comprises: a skeleton support 131, installed inside the fixed cylinder 11; and a coil holder 132, installed on the skeleton support 131, for mounting the superconducting coil 12. Preferably, the skeleton support 131 is a mesh-like cylindrical structure, the coil holder 132 is installed inside the skeleton support 131, and the superconducting coil 12 is mounted on the coil holder 132. The skeleton support 131 and the coil holder 132, in conjunction with the fixed cylinder 11, can jointly bear the repulsive force generated between the superconducting coils 12, preventing the superconducting coil 12 from becoming detached from the coil holder 22, and ensuring the stability and safety of the superconducting magnet 1 structure. Simultaneously, it can reduce the weight of the superconducting magnet 1, facilitating the rotation drive 2 to rotate the superconducting magnet 1.

[0035] In a preferred embodiment, the superconducting magnet 1 further includes a connecting plate disposed between the coil fixing frames 132 and connected to the skeleton support 131, which helps to further improve the stability and safety of the superconducting magnet 1 structure.

[0036] In a preferred embodiment, the superconducting magnet 1 further includes a cooling assembly 14, which comprises: a refrigerator 141 mounted on the outside of the fixed cylinder 11; a connector 142 connected to the refrigerator 141 and extending to the inside of the fixed cylinder 11; and a cooling screen 143 mounted between the fixed cylinder 11 and the magnet frame 13, with both the magnet frame 13 and the superconducting coil 12 housed within the cooling screen 143 and connected to the connector 142, for cooling the superconducting coil 12. The cooling assembly 14 provides a low-temperature environment for the superconducting coil 12 and cools it, thereby ensuring the performance of the superconducting coil 12 and consequently ensuring the strength and stability of the magnetic field provided by the superconducting magnet 1.

[0037] In a preferred embodiment, at least two sets of superconducting coils 12 are arranged along the axial direction of the fixed cylinder 11, with each set containing 2n superconducting coils 12. These 2n superconducting coils 12 are arranged in pairs opposite each other and uniformly distributed circumferentially along the fixed cylinder 11. Preferably, three sets of superconducting coils 12 are arranged along the axial direction of the fixed cylinder 11, with the spacing between adjacent sets of superconducting coils 12 remaining consistent. Each set contains four superconducting coils 12. By arranging at least two sets of superconducting coils 12 along the axial direction of the fixed cylinder 11, this arrangement not only allows for heating of the workpiece 8 in a smaller area, but also allows the magnetic field generated by the superconducting magnet 1 to directly act on the workpiece. Compared to traditional superconducting induction heating devices, the magnetic field generated by the superconducting magnet 1 is stronger and more uniform, produces less leakage magnetic field, has a denser magnetic field, and achieves higher heating efficiency. Furthermore, under the same magnetic field conditions, the number of turns of the superconducting coil 12 can be significantly reduced, the thickness of the superconducting coil 12 can be reduced, and the size and weight of the superconducting magnet 1 will also be smaller, making it easier for the rotating drive 2 to rotate the superconducting magnet 1.

[0038] In a preferred embodiment, the superconducting coil 12 has a circular or rectangular structure and is wound with high-temperature superconducting tape. During operation, direct current excitation in opposite directions is applied to the two opposing superconducting coils 12, which can generate a horizontal magnetic field radially inward along the superconducting magnet 1. This allows the horizontal magnetic field to act directly on the workpiece. Compared with traditional superconducting induction heating devices, the magnetic field generated by the superconducting magnet 1 is stronger and more uniform, with less leakage magnetic field, a denser magnetic field, and higher heating efficiency.

[0039] In a preferred embodiment, the fixing base includes: a support 3; a workpiece mounting component, mounted on the support 3, for fixing the workpiece 8; and a drive assembly, mounted on the support 3, for mounting a rotary drive 2 to drive the superconducting magnet 1 to reciprocate along the axial direction of the workpiece 8. The design of the fixing base structure, combined with the method of fixing the workpiece 8 and heating the workpiece 8 by rotating the superconducting magnet 1 via the rotary drive 2, significantly reduces the equipment's footprint and lowers equipment costs compared to traditional superconducting induction heating devices.

[0040] In a preferred embodiment, the workpiece mounting component includes: a workpiece mounting base 4, mounted on a support 3; and a workpiece fixing rod 5, mounted on the workpiece mounting base 4, for clamping the workpiece 8.

[0041] In a preferred embodiment, the drive assembly includes: a movable guide rail 6, mounted on a support 3, for mounting a rotary drive 2; and a movable drive 7, mounted on the support 3 and connected to the rotary drive 2, for driving the superconducting magnet 1 to reciprocate along the axial direction of the workpiece 8. The design of the drive assembly enables the superconducting magnet 1 to reciprocate along the axial direction of the workpiece 8, thereby facilitating uniform heating of the workpiece 8 and allowing for better control of the heating temperature and time of the workpiece 8.

[0042] In a preferred embodiment, the superconducting induction heating device further includes a PLC control system, wherein the rotary drive 2, the moving drive 7, and the refrigerator 141 are all connected to the PLC control system and are used to control the rotary drive 2, the moving drive 7, and the refrigerator 141 to perform corresponding actions according to instructions.

[0043] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0044] Furthermore, the terms "upper" and "lower" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "upper" or "lower" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0046] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0047] The above are merely preferred embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of the claims of the pending application of the present invention.

Claims

1. A superconducting induction heating device, characterized in that, include: Fixing base, used to fix the workpiece (8); A superconducting magnet (1) has a through hole in the middle for the workpiece (8) to be heated to pass through; A rotary drive (2) is mounted on the fixed base and connected to the superconducting magnet (1) to drive the superconducting magnet (1) to rotate in order to heat the workpiece (8).

2. The superconducting induction heating device as described in claim 1, characterized in that, The superconducting magnet (1) includes: The fixed cylinder (11) has a through hole in the middle for the workpiece (8) to be heated to pass through, and is connected to the rotary drive (2); A superconducting coil (12) is installed inside the fixed cylinder (11).

3. The superconducting induction heating device as described in claim 2, characterized in that, The fixed cylinder (11) includes: The first sub-fixed cylinder (111) has a through hole in the middle for the workpiece (8) to be heated to pass through; The second sub-fixed cylinder (112) is disposed outside the first sub-fixed cylinder (111), and the superconducting coil (12) is installed between the first sub-fixed cylinder (111) and the second sub-fixed cylinder (112). The fixing plate (113) is used to close the two ends of the first sub-fixing cylinder (111) and the second sub-fixing cylinder (112) and is connected to the rotary drive (2).

4. The superconducting induction heating device as described in claim 2, characterized in that, The superconducting magnet (1) further includes a magnet framework (13), which comprises: The frame support (131) is installed inside the fixed cylinder (11); A coil holder (132) is mounted on the skeleton support (131) for mounting the superconducting coil (12).

5. The superconducting induction heating device as described in claim 4, characterized in that, The superconducting magnet (1) further includes a cooling assembly (14), which comprises: A refrigeration unit (141) is installed on the outside of the fixed cylinder (11); The connector (142) is connected to the refrigerator (141) and extends to the inside of the fixed cylinder (11); A cooling screen (143) is installed between the fixed cylinder (11) and the magnet frame (13) and connected to the connector (142) to cool the superconducting coil (12).

6. The superconducting induction heating device as described in claim 2, characterized in that, There are at least two sets of superconducting coils (12) arranged along the axial direction of the fixed cylinder (11). Each set of superconducting coils (12) has 2n coils. The 2n superconducting coils (12) are arranged in pairs opposite each other and are evenly distributed along the circumference of the fixed cylinder (11).

7. The superconducting induction heating device as described in claim 6, characterized in that, The superconducting coil (12) is made of high-temperature superconducting tape and has a circular or rectangular structure. During operation, two opposite superconducting coils (12) are excited by DC current in opposite directions to generate a horizontal magnetic field in the radial direction along the superconducting magnet (1).

8. The superconducting induction heating device as described in claim 1, characterized in that, The fixing base includes: Support (3); The workpiece mounting component is installed on the support (3) and is used to fix the workpiece (8). A drive assembly is mounted on the support (3) for mounting the rotary drive (2) to drive the superconducting magnet (1) to reciprocate along the axial direction of the workpiece (8).

9. The superconducting induction heating device as described in claim 8, characterized in that, The workpiece mounting component includes: The workpiece mounting base (4) is mounted on the support (3); The workpiece fixing rod (5) is installed on the workpiece mounting base (4) and is used to clamp the workpiece (8).

10. The superconducting induction heating device as described in claim 8, characterized in that, The driving component includes: A movable guide rail (6) is mounted on the support (3) for mounting the rotary drive component (2). The moving drive (7) is mounted on the support (3) and connected to the rotating drive (2) to drive the superconducting magnet (1) to reciprocate along the axial direction of the workpiece (8).

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