High-temperature superconducting pancake coil for magnetic confinement device

Abstract

The utility model discloses a high-temperature superconducting cake coil for a magnetic confinement device, which comprises a hollow shell, a cake coil is fixedly connected in the shell, and a sectional optical fiber temperature sensor detection end is connected between the lower end of the cake coil and the lower end in the shell. The right side of the shell is fixedly connected with a circuit interface, the cake coil and the detection end of the sectional optical fiber temperature sensor are electrically connected with the circuit interface, the circuit interface is electrically connected with the control end, the upper end and the lower end of the left side of the shell are fixedly connected with liquid nitrogen inlet and outlet interfaces, and the liquid nitrogen inlet and outlet interfaces are communicated with the interior of the shell. According to the high-temperature superconducting cake type coil for the magnetic confinement device, quenching is prevented through liquid nitrogen continuous cooling and temperature monitoring, a problem area is accurately positioned through a segmented optical fiber sensor, a circuit interface integrates control and communication, on-off can be conducted in time, and the effect of preventing fusing or damage to equipment is achieved.

Description

Technical Field

[0001] This utility model relates to the field of high-temperature superconducting technology, specifically a high-temperature superconducting disc coil for use in magnetic confinement devices. Background Technology

[0002] Superconductivity and magnetic confinement are closely related in achieving controlled nuclear fusion. Superconducting materials are crucial in magnetically confined fusion devices because they can significantly enhance magnetic field strength, thereby more effectively confining the plasma and improving fusion reaction efficiency. Superconducting materials are used to fabricate the magnet system in tokamak devices, including toroidal field coils, poloidal field coils, and central solenoid coils. These coils generate powerful helical magnetic fields when energized, heating the plasma to high temperatures to achieve nuclear fusion. However, existing high-temperature superconducting disc coils lack corresponding temperature detection devices, causing a rapid exceedance of the critical value when the temperature changes at one point, resulting in a surge in resistance and potentially damaging or melting the device. Therefore, a high-temperature superconducting disc coil for magnetic confinement devices is designed to address these issues. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides a high-temperature superconducting disc coil for magnetic confinement devices. This solves the problem that existing high-temperature superconducting disc coils are not equipped with corresponding temperature detection devices, which causes the resistance to spike rapidly when the temperature changes in one area, leading to equipment damage or meltdown.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This invention provides a high-temperature superconducting disc coil for a magnetic confinement device, comprising: a hollow outer shell, a disc coil fixedly connected inside the shell, a segmented fiber optic temperature sensor detection end connected between the lower end of the disc coil and the lower end of the shell, a circuit interface fixedly connected to the right side of the shell, the disc coil and the segmented fiber optic temperature sensor detection end being electrically connected to the circuit interface, the circuit interface being electrically connected to a control terminal, and liquid nitrogen inlet / outlet ports fixedly connected to the upper and lower ends of the left side of the shell, the liquid nitrogen inlet / outlet ports communicating with the interior of the shell.

[0008] Preferably, the inner wall of the outer shell is hollow, and the hollow part of the outer shell is filled with inert gas.

[0009] Preferably, a vacuum pump connection interface is fixedly connected to the upper left side of the outer casing, and the vacuum pump connection interface is in communication with the interior of the outer casing.

[0010] Preferably, the disc coil is connected in parallel with the segmented resistor shunt at the control terminal.

[0011] Preferably, the outer shell is made entirely of stainless steel, and the end plate of the disc coil is connected to the inside of the outer shell by high-strength bolts.

[0012] Preferably, the wires connecting the disc coil, the fiber optic temperature sensor detection end, and the circuit interface are connected by laser welding.

[0013] Preferably, the outer shell is connected to the outside of the magnetic confinement device by welding.

[0014] (III) Beneficial Effects

[0015] This invention provides a high-temperature superconducting disc coil for magnetic confinement devices, which has at least the following advantages compared with the prior art:

[0016] This high-temperature superconducting disc coil used in magnetic confinement devices relies on continuous liquid nitrogen cooling, temperature monitoring to prevent quenching, segmented fiber optic sensors to accurately locate problem areas, and integrated control and communication circuit interfaces to enable on / off switching and prevent melting or damage to the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a bottom view of the present invention;

[0019] Figure 3 This is a cross-sectional view of the present invention;

[0020] Figure 4 This is a partial enlarged view of the present invention.

[0021] In the diagram: 1. Outer shell; 2. Disc coil; 3. Segmented fiber optic temperature sensor detection end; 4. Circuit interface; 5. Liquid nitrogen inlet / outlet interface; 21. Vacuum pump connection interface. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4This utility model provides a technical solution: a high-temperature superconducting disc coil for a magnetic confinement device, comprising: an internally hollow shell 1, a disc coil 2 fixedly connected inside the shell 1, a segmented fiber optic temperature sensor detection end 3 connected between the lower end of the disc coil 2 and the lower end of the shell 1, a circuit interface 4 fixedly connected to the right side of the shell 1, the disc coil 2 and the segmented fiber optic temperature sensor detection end 3 being electrically connected to the circuit interface 4, the circuit interface 4 being electrically connected to a control terminal, and liquid nitrogen inlet / outlet interfaces 5 fixedly connected to the upper and lower ends of the left side of the shell 1, the liquid nitrogen inlet / outlet interfaces 5 being in communication with the interior of the shell 1.

[0024] During operation, liquid nitrogen is injected into the outer shell 1 through the liquid nitrogen inlet / outlet port 5 on the left, filling the hollow cavity and completely immersing the disc coil 2. The low temperature of the liquid nitrogen causes the coil to enter and maintain a superconducting state. The segmented fiber optic temperature sensor detection ends 3 are distributed between the lower end of the disc coil 2 and the bottom of the outer shell 1, measuring the temperature at different locations in segments to ensure uniform cooling by the liquid nitrogen. Data is transmitted to the control terminal through the circuit interface 4. If a local temperature anomaly occurs, such as insufficient liquid nitrogen or coil quenching failure, an alarm or protection mechanism is triggered. This prevents a sudden transition from the superconducting state to the normal state in the event of quenching failure in the high-temperature superconducting disc coil 2, which could lead to a series of chain reactions and potentially cause serious damage to the coil itself, the magnet system, or even the entire tokamak device. The circuit interface 4 provides the operating current to the disc coil 2 and simultaneously receives the temperature signal from the fiber optic sensor. If the temperature exceeds a threshold, the control terminal can cut off the coil current or adjust the liquid nitrogen flow rate. Liquid nitrogen lost through evaporation is replenished through the liquid nitrogen inlet / outlet port 5 to maintain a stable liquid level. After the experiment, residual liquid nitrogen is discharged through the liquid nitrogen inlet / outlet port 5 for easy maintenance. The control unit records historical temperature data for performance analysis and fault diagnosis.

[0025] like Figure 1-4 As shown, this utility model embodiment provides an implementation method. Based on the above implementation method, the inner wall of the outer shell 1 is hollow, and the hollow part of the outer shell 1 is filled with inert gas.

[0026] Analysis of the above structure shows that the inner wall of the outer shell 1 is hollow, which reduces heat exchange with the outside temperature in order to maintain the temperature of the liquid nitrogen inside.

[0027] like Figure 1-4 As shown, this utility model embodiment provides an implementation method. Based on the above implementation method, a vacuum pump connection interface 21 is fixedly connected to the upper left side of the outer shell 1, and the vacuum pump connection interface 21 communicates with the interior of the outer shell 1.

[0028] Analysis of the above structure shows that before liquid nitrogen is injected, the vacuum pump connection interface 21 is connected to the vacuum pump to extract the air inside the outer casing 1, so as to reduce the residual air inside and prevent water residue inside from damaging the equipment.

[0029] like Figure 1-4 As shown, this utility model embodiment provides an implementation method in which the disc coil 2 is connected in parallel with the segmented resistor shunt at the control terminal.

[0030] Analysis of the above structure reveals that when the superconducting layer of the disc coil 2 loses its superconductivity due to factors such as increased temperature or sudden changes in the magnetic field, its resistance will suddenly increase. At this time, the current will be rapidly transferred through the parallel segmented resistive shunt, preventing energy from concentrating in a localized area of ​​the disc coil 2, which could lead to burnout or mechanical damage. The shunt is divided into multiple segments, corresponding to different regions of the disc coil 2. If a segment of the coil loses its superconductivity, only the corresponding segment's shunt is activated, ensuring precise current distribution and minimizing the impact on the entire system.

[0031] like Figure 1-4 As shown, this utility model embodiment provides an implementation method. Based on the above implementation method, the outer shell 1 is made of stainless steel as a whole, and the end plate of the disc coil 2 is connected to the inside of the outer shell 1 by high-strength bolts.

[0032] Analysis of the above structure shows that the outer shell 1 is made entirely of stainless steel, which can withstand external impacts or pressures, protecting the fragile internal disc coil 2 and fiber optic sensor 3 from deformation or damage. At the same time, the rigidity of stainless steel helps maintain airtightness, reducing heat leakage, and stainless steel is inert to liquid nitrogen, ensuring that long-term contact will not cause chemical reactions or oxidation, thus ensuring the purity of the cooling system.

[0033] like Figure 1-4 As shown, this utility model embodiment provides an implementation method. Based on the above implementation method, the wires at the connection points of the disc coil 2, the fiber optic temperature sensor detection end 3, and the circuit interface 4 are connected by laser welding.

[0034] Analysis of the above structure shows that laser welding can achieve atomic-level bonding between superconducting tape and copper stabilization layer or adjacent conductor, with almost no additional resistance introduced and Joule heat loss reduced.

[0035] like Figure 1-4 As shown, this utility model embodiment provides an implementation method in which the outer shell 1 is connected to the outer side of the magnetic confinement device by welding.

[0036] Analysis of the above structure shows that the outer shell 1 is connected to the outer side of the magnetic confinement device by welding, which further provides overall stability.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-temperature superconducting disc coil for use in magnetic confinement devices, characterized in that, include: The shell (1) is hollow inside. A disc coil (2) is fixedly connected inside the shell (1). A segmented fiber optic temperature sensor detection end (3) is connected between the lower end of the disc coil (2) and the lower end of the shell (1). A circuit interface (4) is fixedly connected to the right side of the shell (1). The disc coil (2) and the segmented fiber optic temperature sensor detection end (3) are both electrically connected to the circuit interface (4). The circuit interface (4) is electrically connected to the control end. Liquid nitrogen inlet and outlet interfaces (5) are fixedly connected to the upper and lower ends of the left side of the shell (1). The liquid nitrogen inlet and outlet interfaces (5) are connected to the interior of the shell (1).

2. A high-temperature superconducting disc coil for a magnetic confinement device according to claim 1, characterized in that: The inner wall of the outer shell (1) is hollow, and the hollow part of the outer shell (1) is filled with inert gas.

3. A high-temperature superconducting disc coil for a magnetic confinement device according to claim 1, characterized in that: A vacuum pump connection interface (21) is fixedly connected to the upper left side of the outer shell (1), and the vacuum pump connection interface (21) is connected to the interior of the outer shell (1).

4. A high-temperature superconducting disc coil for a magnetic confinement device according to claim 1, characterized in that: The disc coil (2) is connected in parallel with the segmented resistor shunt at the control end.

5. A high-temperature superconducting disc coil for a magnetic confinement device according to claim 1, characterized in that: The outer shell (1) is made of stainless steel, and the end plate of the disc coil (2) is connected to the inside of the outer shell (1) by high-strength bolts.

6. A high-temperature superconducting disc coil for a magnetic confinement device according to claim 1, characterized in that: The wires connecting the disc coil (2), the fiber optic temperature sensor detection end (3), and the circuit interface (4) are connected by laser welding.

7. A high-temperature superconducting disc coil for a magnetic confinement device according to claim 1, characterized in that: The outer shell (1) is connected to the outside of the magnetic confinement device by welding.

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