Method and device for recycling high-temperature superconducting tape

Abstract

The present invention discloses a method and apparatus for recycling high-temperature superconducting tape. The method comprises: heating a superconducting magnet to the melting point of solder to obtain a superconducting tape stack after primary heating; naturally cooling the superconducting tape stack after primary heating to room temperature, immersing the tape stack in heat-conducting oil, and heating the heat-conducting oil to the melting point of solder to obtain a superconducting tape stack to be separated; separating a single superconducting tape from the superconducting tape stack to be separated; centrally degreasing and cleaning the separated superconducting tapes, returning them to the furnace to scrape off the tin layer, and obtaining a single superconducting tape to be tested; performing a tape Ic test on the superconducting tape to be tested to obtain a superconducting tape that passes the test; screening the superconducting tapes that pass the test, and cutting and removing completely failed superconducting tapes to achieve the recycling and reuse of the superconducting tape. The method can achieve non-destructive recovery and safe reuse of the high-temperature superconducting tape in the superconducting magnet, and the performance of the recovered high-temperature superconducting tape Ic is substantially equivalent to that before use.

Description

Technical Field

[0001] The present invention belongs to the field of high-temperature superconducting magnets, and in particular relates to a method and a device for recovering a high-temperature superconducting strip. Background Art

[0002] Superconducting magnet coils are typically made by stacking multiple superconducting tapes wound around a stainless steel frame within a rotating ramp, similar to a racetrack. These tapes are then heated at high temperatures and then subjected to vacuum pressure impregnation (VPI). There are currently no reports of recycling the superconducting tape within structures like these. This is primarily due to the fact that high-temperature superconducting tape is an extremely fragile material, requiring very high recycling technology. Even the slightest fluctuation in temperature or external force can cause the superconducting layer to crack, rendering the recycling process ineffective. Therefore, when a superconducting magnet quenches or develops defects, it is generally scrapped, resulting in significant waste. High-temperature superconducting tapes are multi-layered and require complex manufacturing processes. Although mature domestic manufacturing processes have been developed in recent years, they remain relatively expensive. However, the superconducting tape within a quenched or defective superconducting magnet is not completely unusable. With the right processing methods and recycling equipment, it can be recycled and reused.

[0003] Chinese patent CN116110654A - "A method and system for recycling superconducting tapes" discloses a method for recycling superconducting tapes. However, its essence is a remedial measure for defective superconducting tapes that have been recycled. The superconducting tape at the defective part is cut off, the defects are removed, and then the protective layer is re-plated. It is mainly used for superconducting tapes in superconducting cables. The recycling of superconducting tapes in superconducting cables is very easy because the superconducting tapes in superconducting cables are all produced by a spiral winding process and do not involve a VPI dipping process. Therefore, when recycling, it is only necessary to strip off the shielding layer and the protective layer of the insulation layer of the superconducting cable core to obtain a complete superconducting tape. However, it is obviously not suitable for superconducting tapes based on the VPI process or the solder dipping process.

[0004] High-temperature superconducting magnets based on the solder dipping process have a strong bonding force between the superconducting tape and the skeleton. When there are dipping defects or repeated dipping exercises, the superconducting tape needs to be separated from the skeleton. However, it is usually difficult to effectively separate the superconducting tape and the skeleton and safely recycle the superconducting tape. Summary of the Invention

[0005] To solve the aforementioned technical problems, the present invention provides a method for recycling high-temperature superconducting tapes, comprising the following steps:

[0006] S1. Heating the superconducting magnet to the melting point of solder to obtain a superconducting tape stack after primary heating;

[0007] S2, naturally cooling the superconducting tape after the primary heating to room temperature, then immersing it in heat-conducting oil, and heating the heat-conducting oil to the melting point of solder, to obtain the superconducting tape to be separated;

[0008] S3, separating a single superconducting tape from the superconducting tape stack to be separated;

[0009] S4, the separated superconducting single ribbons are centrally degreased and cleaned, and the tin layer is scraped off after being returned to the furnace to obtain the superconducting single ribbons to be tested;

[0010] S5. Performing a tape Ic test on the superconducting tape to be tested to obtain a superconducting tape that passes the test;

[0011] S6. Screen the superconducting tapes that have passed the test, cut and remove the completely failed superconducting tapes, and realize the recycling and reuse of the superconducting tapes.

[0012] Furthermore, step S1 includes:

[0013] S1.1. Place the superconducting magnet in the air;

[0014] S1.2. Heat the overhead superconducting magnet to the melting point of solder to obtain a superconducting tape stack after single heating.

[0015] Furthermore, step S3 includes:

[0016] S3.1. Blow away the residual tin on the surface of the superconducting tape in the superconducting tape stack to be separated;

[0017] S3.2. Automatically and swirlingly collect and blow off a superconducting single tape from the superconducting tape with residual tin on the surface, and make it move slowly to achieve separation. Repeat this step until all superconducting single tapes are separated.

[0018] Furthermore, the heat-conducting oil is smokeless heat-conducting silicone oil.

[0019] The present invention also provides a high-temperature superconducting tape recovery device, comprising:

[0020] Auxiliary tooling for overhead superconducting magnets;

[0021] An industrial oven is used to heat the overhead superconducting magnet to the melting point of solder to obtain a superconducting tape stack after primary heating, and the superconducting tape stack after primary heating is immersed in heat-conducting oil in the auxiliary tooling;

[0022] A heating platform is used to uniformly heat the superconducting tapes immersed in thermal oil to the melting point of the solder to obtain the superconducting tapes to be separated;

[0023] A superconducting single tape separation mechanism, used to separate a superconducting single tape from a stack of superconducting tapes to be separated;

[0024] The acquisition mechanism is used to centrally remove oil and clean the separated superconducting single ribbons, return them to the furnace and scrape off the tin layer to obtain the superconducting single ribbons to be tested;

[0025] A strip Ic test module is used to perform a strip Ic test on a superconducting strip to be tested and obtain a superconducting strip that passes the test;

[0026] The screening, cutting and removal mechanism is used to screen the superconducting single tapes that have passed the test, and to cut and remove the completely failed superconducting single tapes, so as to realize the recycling and reuse of the superconducting tapes.

[0027] Furthermore, the auxiliary tooling is stacked in sequence along the tin shedding direction:

[0028] The heightening strips are used to support the skeleton of the superconducting magnet, form a natural hanging space for the superconducting tapes after tin melting, and also form a channel for the tin between the superconducting tapes in the superconducting tapes to fall off after melting;

[0029] Tin leakage net, used to accommodate the superconducting tapes that naturally fall after the tin is melted;

[0030] The tin box is used to collect the tin that falls off after melting, and is also used to hold thermal oil to soak the superconducting tape after it is heated once.

[0031] Furthermore, the superconducting single tape separation mechanism includes a desolder, an automatic collecting tray, and a simulated turn track, and the desolder and the automatic collecting tray are movably connected to the simulated turn track.

[0032] in,

[0033] The tin remover is driven by the first motor and is used to blow away the residual tin on the surface of the superconducting tape in the superconducting tape stack to be separated;

[0034] The automatic collecting plate is driven by the second motor and is used for automatically collecting a single superconducting tape from the superconducting tapes after the residual tin on the surface is blown off, and making it move slowly along the pseudo-turn track to achieve separation.

[0035] Furthermore, the first motor is a servo motor or a stepper motor, and the second motor is a servo motor or a stepper motor.

[0036] Compared with the prior art, the method for recycling high-temperature superconducting tapes provided by the present invention comprises the following steps: firstly heating a superconducting magnet to the melting point of solder to obtain a superconducting tape stack after single heating; naturally cooling the superconducting tape stack after single heating to room temperature, then immersing the tape stack in heat-conducting oil, and heating the heat-conducting oil to the melting point of solder to obtain a superconducting tape stack to be separated; then separating a superconducting single tape from the superconducting tape stack to be separated; centrally degreasing and cleaning the separated superconducting single tapes, returning to the furnace and scraping off the tin layer to obtain a superconducting single tape to be tested; performing a tape Ic test on the superconducting single tape to be tested to obtain a superconducting single tape that passes the test; finally, screening the superconducting single tapes that pass the test, cutting and removing completely failed superconducting single tapes, and realizing the recycling and reuse of the superconducting tapes. The high-temperature superconducting tape recycling method can achieve the non-destructive recovery and safe reuse of high-temperature superconducting tape within superconducting magnets, core components of nuclear fusion devices, after they have been impregnated with solder. In production practice, the recovery of two reels (each containing 30 strips, nearly 1,000 meters) of quenched high-temperature superconducting tape has been completed. After IC testing, the failed parts were removed, and the IC performance of the recovered high-temperature superconducting tape was basically the same as before use. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A flow chart showing a method for recycling a high-temperature superconducting tape according to an embodiment of the present invention is shown;

[0038] Figure 2 A schematic structural diagram of an auxiliary tooling in a high-temperature superconducting tape recovery device according to an embodiment of the present invention is shown;

[0039] Figure 3 A schematic structural diagram of a superconducting single tape separation mechanism in a high-temperature superconducting tape recovery device according to an embodiment of the present invention is shown;

[0040] 1: Superconducting magnet, 2: Heightening bar, 3: Tin leakage net, 4: Tin receiving box, 5: Tin remover, 6: Automatic collecting tray, 7: Simulated turn track. DETAILED DESCRIPTION

[0041] The following is a detailed description of specific embodiments of the present invention. It should be understood that the embodiments of the present invention are not limited to the embodiments shown in the accompanying drawings, and the scope of protection of the present invention is not limited by the specific embodiments. The terms "first," "second," and similar terms used in the present invention do not indicate any order, quantity, or importance, but are only used to distinguish different components. Similarly, terms such as "one," "an," or "the" do not indicate a quantitative limitation, but rather indicate the presence of at least one. Unless otherwise expressly indicated, throughout the specification and claims, the term "comprise" or variations such as "include" or "comprising" will be understood to include the elements or components stated, without excluding other elements or components. Terms such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0042] Unless otherwise defined, the meanings of all technical terms and scientific terms used in the present invention are the same as those commonly understood by ordinary technicians in the field. In addition, the meanings of the technical terms and scientific terms used in the present invention should be interpreted as having the same meanings as the corresponding terms defined in commonly used technical manuals, and should not be interpreted as having idealized or excessive formal meanings, unless explicitly defined in this way in the present invention.

[0043] Figure 1 A flow chart showing a method for recycling high-temperature superconducting tape according to an embodiment of the present invention is shown. Figure 1 The method for recovering the high-temperature superconducting tape comprises the following steps:

[0044] S1. Heating the superconducting magnet 1 to the melting point of solder to obtain a superconducting tape stack after one heating.

[0045] A superconducting tape stack is an integral structure formed by stacking multiple superconducting single tapes and then soldering them.

[0046] When the superconducting magnet 1 is heated to the melting point of the solder, the solder melts and the superconducting tapes in the superconducting magnet 1 naturally fall down under the action of gravity, thereby achieving natural separation of the superconducting tapes and the frame.

[0047] Specifically, the step S1 further includes:

[0048] S1.1. Place the superconducting magnet 1 in the air;

[0049] S1.2. The overhead superconducting magnet 1 is heated to the melting point of the solder to obtain a superconducting tape stack after one heating.

[0050] S2. The superconducting tape stack after the primary heating is naturally cooled to room temperature, and then immersed in heat-conducting oil, and the heat-conducting oil is heated to the melting point of solder to obtain the superconducting tape stack to be separated.

[0051] Among them, after the heat-conducting oil is heated to the melting point of solder, the tin between the superconducting tapes in the superconducting stack melts and falls off.

[0052] Specifically, the heat-conducting oil is smokeless heat-conducting silicone oil, which can uniformly heat the entire superconducting tape in an immersed state, and the smokeless heat-conducting silicone oil itself does not react with the superconducting tape, tin material, etc. in the superconducting tape.

[0053] S3. Separate a single superconducting tape from the superconducting tape stack to be separated.

[0054] Specifically, the step S3 further includes:

[0055] S3.1. Blow away the residual tin on the surface of the superconducting tape in the superconducting tape stack to be separated;

[0056] S3.2. Automatically and swirlingly collect and blow off a superconducting single tape from the superconducting tape with residual tin on the surface, and make it move slowly to achieve separation. Repeat this step until all superconducting single tapes are separated.

[0057] S4. The separated superconducting ribbons are centrally degreased and cleaned, returned to the furnace and the tin layer is scraped flat to obtain the superconducting ribbons to be tested.

[0058] S5. Performing a tape Ic (referring to the critical current of the tape in the superconducting state) test on the superconducting tape to be tested, and obtaining a superconducting tape that passes the test;

[0059] S6. Screen the superconducting tapes that have passed the test, cut and remove the completely failed superconducting tapes, and realize the recycling and reuse of the superconducting tapes.

[0060] The present invention also provides a high-temperature superconducting tape recovery device, comprising:

[0061] Auxiliary tooling for overhead superconducting magnet 1;

[0062] An industrial oven is used to heat the overhead superconducting magnet 1 to the melting point of solder to obtain a superconducting tape after primary heating, and the superconducting tape after primary heating is placed in an auxiliary tooling and immersed in heat-conducting oil;

[0063] A heating platform is used to uniformly heat the superconducting tapes immersed in thermal oil to the melting point of the solder to obtain the superconducting tapes to be separated;

[0064] A superconducting single tape separation mechanism, used to separate a superconducting single tape from a stack of superconducting tapes to be separated;

[0065] The acquisition mechanism is used to centrally remove oil and clean the separated superconducting single ribbons, return them to the furnace and scrape off the tin layer to obtain the superconducting single ribbons to be tested;

[0066] A strip Ic test module is used to perform a strip Ic test on a superconducting strip to be tested and obtain a superconducting strip that passes the test;

[0067] The screening, cutting and removal mechanism is used to screen the superconducting single tapes that have passed the test, and to cut and remove the completely failed superconducting single tapes, so as to realize the recycling and reuse of the superconducting tapes.

[0068] Furthermore, Figure 2 The schematic diagram of the structure of the auxiliary tooling in the high-temperature superconducting tape recovery device according to the embodiment of the present invention is shown. Figure 2 , the auxiliary tooling is stacked in sequence along the tin shedding direction:

[0069] The heightening strip 2 is used to support the skeleton of the superconducting magnet 1, form a natural hanging space for the superconducting tape after the tin is melted, and also form a channel for the tin between the superconducting tapes in the superconducting tape to fall off after melting;

[0070] The tin leakage net 3 is used to accommodate the superconducting tapes that naturally fall after the tin is melted;

[0071] The tin receiving box 4 is used to receive the tin that falls off after melting, and is also used to contain heat-conducting oil for soaking the superconducting tape after the superconducting tape is heated once.

[0072] Furthermore, Figure 3 The schematic diagram of the structure of the superconducting single tape separation mechanism in the high-temperature superconducting tape recovery device according to the embodiment of the present invention is shown. Figure 3 The superconducting single tape separation mechanism includes a tin remover 5, an automatic collecting tray 6, and a simulated turn track 7, and the tin remover 5 and the automatic collecting tray 6 are movably connected to the simulated turn track 7, wherein,

[0073] The tin remover 5 is driven by the first motor and is used to blow away the residual tin on the surface of the superconducting tape in the superconducting tape stack to be separated;

[0074] The automatic collecting tray 6 is driven by the second motor and is used to automatically and swirlingly collect a superconducting single tape from the superconducting tapes after the residual tin on the surface is blown off, and to make it move slowly along the pseudo-turn track 7 to achieve separation.

[0075] Specifically, the first motor and the second motor are servo motors or stepper motors.

[0076] In summary, the present invention provides a method for recycling high-temperature superconducting tapes, which comprises the following steps: first, heating a superconducting magnet 1 to the melting point of solder to obtain a superconducting tape stack after single heating; naturally cooling the superconducting tape stack after single heating to room temperature, then immersing it in heat-conducting oil, and heating the heat-conducting oil to the melting point of solder to obtain a superconducting tape stack to be separated; then separating a superconducting single tape from the superconducting tape stack to be separated; centrally degreasing and cleaning the separated superconducting single tapes, returning them to the furnace and scraping off the tin layer to obtain a superconducting single tape to be tested; performing a tape Ic test on the superconducting single tape to be tested, and obtaining a superconducting single tape that passes the test; finally, screening the superconducting single tapes that pass the test, cutting, and removing completely failed superconducting single tapes, thereby realizing the recycling and reuse of the superconducting tapes. The high-temperature superconducting tape recycling method can achieve the non-destructive recovery and safe reuse of high-temperature superconducting tape within superconducting magnets, core components of nuclear fusion devices, after they have been impregnated with solder. In production practice, the recovery of two reels (each containing 30 strips, nearly 1,000 meters) of quenched high-temperature superconducting tape has been completed. After IC testing, the failed parts were removed, and the IC performance of the recovered high-temperature superconducting tape was basically the same as before use.

[0077] The foregoing descriptions of specific exemplary embodiments of the present invention are for purposes of illustration and description. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is apparent that many modifications and variations are possible in light of the foregoing teachings. The exemplary embodiments have been selected and described for the purpose of explaining the specific principles of the invention and their practical application, thereby enabling those skilled in the art to realize and utilize a variety of exemplary embodiments of the invention and various options and variations. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A method for recycling high-temperature superconducting tape, characterized in that: The following steps are involved: S1. Heating the superconducting magnet to the melting point of solder to obtain a superconducting tape stack after primary heating; S2, naturally cooling the superconducting tape after the primary heating to room temperature, then immersing it in heat-conducting oil, and heating the heat-conducting oil to the melting point of solder to obtain the superconducting tape to be separated; S3, separating a single superconducting tape from the superconducting tape stack to be separated; S4, centrally degreasing and cleaning the separated superconducting single ribbons, returning them to the furnace and scraping off the tin layer to obtain the superconducting single ribbons to be tested; S5. Performing a tape Ic test on the superconducting tape to be tested to obtain a superconducting tape that passes the test; S6. Screening the superconducting tapes that have passed the test, cutting and removing completely failed superconducting tapes, and realizing the recycling and reuse of the superconducting tapes.

2. The method for recycling high-temperature superconducting tape according to claim 1, characterized in that: The step S1 comprises: S1.

1. The superconducting magnet is suspended; S1.

2. Heating the overhead superconducting magnet to the melting point of solder to obtain the superconducting tape stack after the primary heating.

3. The method for recycling high-temperature superconducting tape according to claim 1, characterized in that: The step S3 comprises: S3.

1. Blow away the residual tin on the surface of the superconducting tape in the superconducting tape stack to be separated; S3.

2. Automatically and swirlingly collect and blow off a superconducting single tape from the superconducting tape with residual tin on the surface, and make it move slowly to achieve separation. Repeat this step until all superconducting single tapes are separated.

4. The method for recycling high-temperature superconducting tape according to claim 1, characterized in that: The heat-conducting oil is smokeless heat-conducting silicone oil.

5. A device for recovering high-temperature superconducting tapes, characterized in that: include: Auxiliary tooling for overhead superconducting magnets; An industrial oven is used to heat the overhead superconducting magnet to the melting point of solder to obtain a superconducting tape stack after primary heating, and the superconducting tape stack after primary heating is immersed in heat-conducting oil in the auxiliary tooling; A heating platform is used to uniformly heat the superconducting tapes immersed in thermal oil to the melting point of the solder to obtain the superconducting tapes to be separated; a superconducting single tape separation mechanism, used for separating a superconducting single tape from the superconducting stack of tapes to be separated; The acquisition mechanism is used to centrally remove oil and clean the separated superconducting single ribbons, return them to the furnace and scrape off the tin layer to obtain the superconducting single ribbons to be tested; a strip Ic test module, configured to perform a strip Ic test on the superconducting single strip to be tested, and obtain a superconducting single strip that passes the test; The screening, cutting and removing mechanism is used to screen the superconducting single tapes that have passed the test, and to cut and remove the completely failed superconducting single tapes, so as to realize the recycling and reuse of the superconducting tapes.

6. The high-temperature superconducting tape recovery device according to claim 5, characterized in that: The auxiliary tools are stacked in sequence along the tin shedding direction: The heightening strips are used to support the skeleton of the superconducting magnet, form a natural hanging space for the superconducting tapes after tin melting, and form a channel for the tin between the superconducting tapes in the superconducting tapes to fall off after melting; Tin leakage net, used to accommodate the superconducting tapes that naturally fall after the tin is melted; The tin receiving box is used to receive the tin that falls off after melting, and is also used to contain the heat-conducting oil for soaking the superconducting tape after the first heating.

7. The high-temperature superconducting tape recovery device according to claim 5, characterized in that: The superconducting single tape separation mechanism includes a desolder, an automatic collecting tray, and a simulated turn track, and the desolder and the automatic collecting tray are movably connected to the simulated turn track. in, The detinning device is driven by the first motor and is used to blow away the residual tin on the surface of the superconducting tape in the superconducting tape stack to be separated; The automatic collecting plate is driven by the second motor and is used to automatically collect a single superconducting tape from the superconducting tapes after the residual tin on the surface is blown off, and make it move slowly along the pseudo-turn track to achieve separation.

8. The high-temperature superconducting tape recovery device according to claim 7, characterized in that: The first motor is a servo motor or a stepper motor, and the second motor is a servo motor or a stepper motor.

Images