JP2020202316A - Wind and react type superconducting coil, wind and react type superconducting coil manufacturing method, and superconducting electromagnet device - Google Patents

Abstract

To provide a highly reliable wind and react type superconducting coil and a manufacturing method thereof which eliminate a gap between coil members of a wind and react type superconducting coil and avoid a coil winding from being displaced relative to a bobbin inside a superconducting coil.SOLUTION: A wind and react type superconducting coil 1A includes a bobbin (2a, 2b, 2c, 2d) divided into multiple parts in the circumferential direction, a coil winding 4 in which a wire rod that functions as a superconductor in a predetermined environment is wound around the bobbin, and a ring 3 placed inside the bobbin concentrically with the bobbin, and the outer diameter side of the bobbin (2a, 2b, 2c, 2d) and the inner diameter side of the coil winding 4 are in close contact with each other.SELECTED DRAWING: Figure 2C

Description

The present invention relates to a wind & and react type superconducting coil, a method for manufacturing a wind & react type superconducting coil, and a superconducting magnet device.

The superconducting magnet device can carry a current having a current density several tens to several hundred times higher than that of a magnet device using a copper power cable, and can generate a stronger magnetic field. Such superconducting magnet devices are applied to products that require a strong magnetic field, such as MRI (Magnetic Resonance Imaging) devices, NMR (Nuclear Magnetic Resonance) devices, and magnets for particle accelerators.
The above-mentioned superconducting magnets are superconducting typified by niobium titanium (NbTi), tin niobate (Nb ₃ Sn), magnesium niborate (MgB ₂ ), bismuth superconductor (BSCCO), and yttrium superconductor (YBCO). It consists of a superconducting coil using wires. However, among these superconducting wires, those using Nb ₃ Sn or MgB ₂ are vulnerable to distortion, and even if a strain of about 0.2% is applied, the superconducting performance is lost. Therefore, if there is a risk that excessive strain will be applied to the superconducting wire during coil production due to restrictions such as dimensions, first wind a wire material holding the material in the previous stage that functions as a superconductor, and then wind it on the bobbin. , The wind & react method is adopted in which the wire rod together with the bobbin is heat-treated at a high temperature to generate a superconductor and used as a superconducting wire.

As described above, it is a wind and react method that makes it possible to apply a superconducting wire that is sensitive to distortion to a superconducting magnet device. To generate the superconductor, both the winding and the bobbin around which this winding is wound are used. It is necessary to heat-treat at a high temperature of 500 ° C. or higher. Then, during the heat treatment, a gap may be generated between the coil constituent members due to thermal deformation caused by a difference in thermal expansion or annealing of the coil constituent members or a volume change due to a reaction of forming a superconductor.

An example will be specifically described with reference to FIG. FIG. 10 is a diagram showing an example of a state in which the coil winding 4 of the superconductor is formed by the wind and react method of the conventional example. FIG. 10 shows a state in which the coil winding 4 is wound around the bobbin 27. Initially (before heat treatment), the coil winding 4 was wound in close contact with the bobbin 27, but when the coil winding 4 was heat-treated at a high temperature of 500 ° C. or higher in order to form a superconducting wire, the coil winding 4 was wound. It shows a state in which a gap 11 is formed between the coil winding 4 and the bobbin 27 due to the difference in thermal expansion between the wire 4 and the bobbin 27 and the difference in thermal deformation caused by annealing.

When such a gap is generated, the coil winding may be displaced relative to the bobbin after the heat treatment, and a part of the superconducting wire may be excessively distorted, and the superconducting performance may be impaired.
In addition, the coil winding should be located on a concentric circle with the bobbin, but a magnetic field with different specifications is generated due to relative displacement, for example, imaging is not possible with an MRI device, or the beam cannot be accelerated with an accelerator magnet. Problems may occur.
Patent Document 1 and Patent Document 2 deal with such a gap between coil members and excessive strain during heat treatment and cooling.

[Summary] of Patent Document 1 describes "a method and system for producing a superconducting material. In one embodiment, a fireproof cushion layer is arranged on a spool. A first layer of a superconducting cable. The superconducting cable on the spool is heat-reacted on the first layer of the fireproof cloth. The first layer of the fireproof fabric can be placed on the fireproof cushion layer. Superconducting one or more adjustment mechanisms. It can be placed between the first layer of the cable and the spool. ”, Discloses a technique for manufacturing a superconducting material.

[Abstract] of Patent Document 2 provides "[Purpose] a method for manufacturing an oxide superconducting coil capable of suppressing deterioration of superconducting characteristics in a manufacturing process and withstanding an electromagnetic force in a high magnetic field. Configuration] As a material for the inter-turn insulating layer 3 used to prevent short circuits in the oxide superconducting coil, heat resistance that does not react with the oxide superconductor 2 in the heat treatment process and does not cause thermal strain in the superconductor even in the cooling process. When ceramics are used and then the coil is cooled to an extremely low temperature, the insulating resin is impregnated between turns so that the heat shrinkage of the insulating layer 3 becomes the same as that of the oxide superconductor. " It is described and discloses a technique of a method for manufacturing an oxide superconducting coil.

Special Table 2017-517899 Japanese Unexamined Patent Publication No. 9-63881

However, also in the techniques disclosed in Patent Document 1 and Patent Document 2, the coil windings are displaced relative to the bobbin during and after the production of the superconducting coil, causing excessive distortion in a part of the superconducting wire. There is a problem (problem) that the superconducting performance is impaired and the coil winding cannot be arranged at a predetermined position inside the coil, but it is insufficient and the manufacturing process is complicated. It was.

The present invention eliminates the gap between coil members that occurs after heat treatment of a wind-and-react type superconducting coil (wind-and-react type superconducting coil), and the coil winding is displaced relative to the coil bobbin inside the superconducting coil. It is an object (purpose) to provide a highly reliable wind & react type superconducting coil and a method for manufacturing the coil, while avoiding the above.

In order to solve the above-mentioned problems, the present invention was configured as follows.
That is, in the wind & react type superconducting coil of the present invention, a bobbin divided into a plurality of parts in the circumferential direction, a coil winding in which a wire rod functioning as a superconductor in a predetermined environment is wound around the bobbin, and a concentric circle with the bobbin. The bobbin is provided with a ring arranged inside the bobbin, and the outer diameter side of the bobbin and the inner diameter side of the coil winding are in close contact with each other.

Further, in the method for manufacturing a wind & react type superconducting coil of the present invention, a bobbin divided into a plurality of parts in the circumferential direction, a coil winding in which a wire rod functioning as a superconductor is wound around the bobbin, and a concentric circle with the bobbin. A wind and react type superconducting coil including a ring arranged inside the bobbin, a base plate on which the bobbin is arranged, a fastening mechanism for fastening the bobbin to the base plate, and a temperature for adjusting the temperature of the ring. A method for manufacturing a wind & react type superconducting coil, which is manufactured by using an adjusting mechanism and a heat treatment apparatus that heats the entire wind & react type superconducting coil to perform heat treatment, wherein the bobbin, the ring, and the coil winding are used. The wire is placed on the base plate, the fastening between the base plate and the bobbin is released, and the heat treatment device includes the bobbin, the coil winding, the ring, and the base plate, and the coil winding. The material in the previous stage that functions as the superconductor held in the coil heats the ring and the coil winding to maintain a predetermined temperature difference by applying a predetermined temperature for producing the superconductor and holding the coil winding for a predetermined time. After the heat treatment device cools the bobbin, the coil winding, the ring, and the base plate while turning on and adjusting the temperature adjusting mechanism as described above, and the temperature of the coil winding returns to room temperature. The temperature adjusting mechanism is turned off, and after the bobbin, the coil winding, the ring, and the base plate have returned to room temperature, the bobbin and the base plate are refastened.

Further, the superconducting magnet device of the present invention is characterized by including the wind & react type superconducting coil.

In addition, other means will be described in the form for carrying out the invention.

According to the present invention, the gap between the coil members generated after the heat treatment of the wind & react type superconducting coil is eliminated, and the coil winding is prevented from being displaced relative to the bobbin inside the superconducting coil, so that the reliability is high. We can provide wind & react type superconducting coils and methods for manufacturing them.

It is a figure which shows a part of the cross section in the I-I axis of FIG. 2A which looked at the structural example of the wind & react type superconducting coil which concerns on 1st Embodiment of this invention from the side. It is a figure which shows the cross section in the II-II axis of FIG. 1 which looked at the structural example before heat treatment of the wind & react type superconducting coil which concerns on 1st Embodiment of this invention from the top surface. It is a figure which shows the cross section in the II-II axis of FIG. 1 which looked at the structural example during heat treatment of the wind & react type superconducting coil which concerns on 1st Embodiment of this invention. It is a figure which shows the cross section in the II-II axis of FIG. 1 which looked at the structural example after heat treatment of the wind & react type superconducting coil which concerns on 1st Embodiment of this invention from the top surface. It is a figure which shows the flowchart example of the manufacturing method of the wind & react type superconducting coil which concerns on 1st Embodiment of this invention. It is a figure which shows a part of the cross section in the IV-IV axis of FIG. 5A which looked at the structural example of the wind & react type superconducting coil which concerns on 2nd Embodiment of this invention from the side. It is a figure which shows the cross section in the VV axis of FIG. 4 which looked at the structural example before the heat treatment of the wind & react type superconducting coil which concerns on 2nd Embodiment of this invention from the top surface. It is a figure which shows the cross section in the VV axis of FIG. 4 which looked at the structural example during heat treatment of the wind & react type superconducting coil which concerns on 2nd Embodiment of this invention from the top surface. It is a figure which shows the cross section in the VV axis of FIG. 4 which looked at the structural example after heat treatment of the wind & react type superconducting coil which concerns on 2nd Embodiment of this invention from the top surface. It is a figure which shows the flowchart example of the manufacturing method of the wind & react type superconducting coil which concerns on 2nd Embodiment of this invention. It is a figure which shows a part of the cross section in the VII-VII axis of FIG. 8A which looked at the structural example of the wind & react type superconducting coil which concerns on 3rd Embodiment of this invention from the side. It is a figure which shows the cross section in the VIII-VIII axis of FIG. 7 which looked at the structural example before heat treatment of the wind & react type superconducting coil which concerns on 3rd Embodiment of this invention from the top surface. It is a figure which shows the cross section in the VIII-VIII axis of FIG. 7 which looked at the structural example during heat treatment of the wind & react type superconducting coil which concerns on 3rd Embodiment of this invention from the top surface. It is a figure which shows the cross section in the VIII-VIII axis of FIG. 7 which looked at the structural example after the heat treatment of the wind & react type superconducting coil which concerns on 3rd Embodiment of this invention from the top surface. It is a figure which shows the schematic structure example of the part related to the wind & react type superconducting coil of the superconducting magnet device which concerns on 4th Embodiment of this invention. It is a figure which shows an example of the state which formed the coil winding of a superconductor by the wind & react method of the conventional example.

Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as “embodiments”) will be described as appropriate with reference to the drawings.

<< First Embodiment >>
The wind & react type superconducting coil and the method for manufacturing the wind & react type superconducting coil according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 3.
FIG. 1 is a diagram showing a part of a cross section on the I-I axis of FIG. 2A, which will be described later when a configuration example of the wind & react type superconducting coil 1A according to the first embodiment of the present invention is viewed from the side.
In FIG. 1, the wind & react type superconducting coil 1A includes a bobbin (coil bobbin) 2, a ring 3, a coil winding 4, a base plate 5, a temperature adjusting mechanism 6A, and a fastening mechanism 7. The temperature adjusting mechanism 6A may be removed after the wind & react type superconducting coil 1A is formed. Further, the central axis 22 shows the central axis of the wind & react type superconducting coil 1A located at the intersection of the two I-I axes in the cross-sectional views of FIGS. 2A, 2B, and 2C described later.

The wind-and-react type superconducting coil 1A shown in FIG. 1 shows a cross-sectional structure in the I-axis in four directions from the central axis 22 of FIG. 2A, which will be described later. That is, the cross-sectional structure of the wind & react type superconducting coil 1A in the I-axis in the four directions from the central axis 22 in FIG. 2A has the cross-sectional structure shown in FIG. 1 in the four directions.
The horizontal cross section of the II-II axis in FIG. 1 has the cross-sectional structures of FIGS. 2A, 2B, and 2C, which will be described later.
In FIG. 1, the ring 3, the bobbin 2, and the coil winding 4 are arranged on the base plate 5.
The ring 3 is arranged radially inside the bobbin 2.
The bobbin 2 is used as a winding frame when winding the coil winding 4.
Further, the bobbin 2 is fastened to the base plate 5 by the fastening mechanism 7. The temperature of the ring 3 is adjusted by a temperature adjusting mechanism 6A which is a heating means such as a heater.

2A, 2B, and 2C are views showing a cross section of the wind & react type superconducting coil 1A according to the first embodiment of the present invention in the II-II axis of FIG. 1 as viewed from above.
FIG. 2A shows the configuration of the wind & react type superconducting coil 1A before the heat treatment. FIG. 2B shows the configuration of the wind & react type superconducting coil 1A during heat treatment (temperature adjustment mechanism is activated). FIG. 2C shows the configuration of the wind & react type superconducting coil 1A after the heat treatment.
Note that, in FIGS. 2A, 2B, and 2C, the ring 3, the bobbin 2 (2a, 2b, 2c, 2d), and the coil winding 4 are shown. However, in FIGS. 2A, 2B, and 2C, which are cross-sectional views of the II-II axis of FIG. 1, the base plate 5, the temperature adjusting mechanism 6A, and the fastening mechanism 7 are not shown.
Further, as shown in FIGS. 2A, 2B, and 2C, the bobbin 2 is evenly divided into four bobbins 2a, 2b, 2c, and 2d.

Although not shown in FIGS. 1 and 2A, 2B, and 2C, a heat treatment apparatus that heats and heat-treats the entire wind & react type superconducting coil 1A is a wind & react type superconducting coil manufacturing apparatus. (Not shown) and used in the manufacturing process.
In addition, a temperature measuring device (not shown) that measures the temperature in the atmosphere in which the entire wind & react type superconducting coil 1A is placed and the temperature of each of the ring 3 and the coil winding 4 is a wind & react type superconducting. It is provided in the coil manufacturing equipment and used in the manufacturing process.

《Before heat treatment》
As described above, FIG. 2A shows the state of the wind & react type superconducting coil 1A before the heat treatment performed by the heat treatment apparatus described above.
In FIG. 2A, the bobbins 2a, 2b, 2c, and 2d are in contact with each other to form the bobbin 2. Further, the ring 3 and the bobbins 2a, 2b, 2c, and 2d are arranged apart from each other.
The coil winding 4 is configured by winding a wire rod holding a substance in the previous stage that functions as a superconductor around a bobbin 2.
Further, since the coil winding 4 is configured to be wound around the bobbin 2 (2a, 2b, 2c, 2d), there is a gap between the coil winding 4 and the bobbin 2 (2a, 2b, 2c, 2d). There may be a gap.
Further, the bobbin 2 (2a, 2b, 2c, 2d) and the base plate 5 are released from the fastening mechanism 7.

《During heat treatment》
As described above, FIG. 2B shows a state in which the wind & react type superconducting coil 1A is undergoing heat treatment. The temperature adjusting mechanism 6A operates (ON) as a heating means.
Further, as described above, although not shown in FIG. 2B, there is a heat treatment apparatus that heats the entire wind & react type superconducting coil 1A to perform heat treatment. That is, a heat treatment apparatus (not shown) heat-treats the entire wind & react type superconducting coil 1A. Further, the temperature adjusting mechanism 6A controls the temperature difference between the ring 3 and the coil winding 4.

In order to make the coil winding 4 of the wind & react type superconducting coil 1A a superconductor, heat treatment is performed by a heat treatment apparatus. The heat treatment by this heat treatment apparatus is performed by heating the wind & react type superconducting coil 1A shown in FIGS. 1 and 2B to a high temperature. By this heat treatment, the coil winding 4 having the wire rod holding the substance in the previous stage that functions as a superconductor becomes a superconducting coil.
The coil winding 4 to be the superconducting coil will have magnesium diboride (MgB ₂ ) as, for example, a superconductor by heat treatment. The substance in the pre-stage that functions as a superconductor before the heat treatment is, for example, a substance that is a base that constitutes magnesium diboride (MgB ₂ ) by the heat treatment.

In addition to this heat treatment, the temperature of the ring 3 is further raised by the heating means of the temperature adjusting mechanism 6A. Due to the temperature rise by the temperature adjusting mechanism 6A, the ring 3 expands and an external force 14A indicated by an arrow in FIG. 2B is generated.
The temperature adjusting mechanism 6A heats the ring 3 by controlling the ring 3 and the coil winding 4 so as to maintain a specified (predetermined) temperature difference.
The bobbin 2 (2a, 2b, 2c, 2d) receives pressure outward in the radial direction due to the external force 14A caused by the expansion of the ring 3. The bobbin 2 (2a, 2b, 2c, 2d) is not fastened to the base plate 5.
Since the bobbins 2a to 2d divided in the circumferential direction can be individually displaced in the radial direction, they are displaced outward in the radial direction. Due to this displacement, the bobbin 2 (2a, 2b, 2c, 2d) eliminates the gap with the coil winding 4.
A supplement and details on how the external force 14A shown in FIG. 2B is generated will be described later.
Further, a supplement and details of how to adjust the temperature adjusting mechanism 6A will be described later.

《After heat treatment》
As described above, FIG. 2C shows the configuration of the wind & react type superconducting coil 1A after the heat treatment.
Since the coil winding 4 of the wind & react type superconducting coil 1A is used as a superconductor, the temperature adjusting mechanism 6A keeps a specified (predetermined) temperature difference between the ring 3 and the coil winding 4 after the heat treatment. While adjusting, the heat treatment by the heat treatment apparatus is stopped to cool the entire wind & react type superconducting coil 1A.
Then, after the temperature of the coil winding 4 returns to room temperature (room temperature, a predetermined temperature after cooling), the temperature adjusting mechanism 6A is turned off (OFF).
After all the components of the wind & react type superconducting coil 1A have returned to room temperature, the bobbin 2 (2a, 2b, 2c, 2d) and the base plate 5 are refastened by the fastening mechanism 7.

In the wind & react type superconducting coil 1A after heat treatment shown in FIG. 2C, the outer diameter side of the bobbin 2 (2a, 2b, 2c, 2d) and the inner diameter side of the coil winding 4 are in close contact with each other without a gap. That is, it is possible to prevent the coil winding 4 from being displaced relative to the bobbin 2 (2a, 2b, 2c, 2d) inside the wind & react type superconducting coil 1A.
Therefore, it is possible to prevent the superconducting state and the superconducting performance from being lost due to excessive distortion in the coil winding 4 which is the superconducting wire.
When the wind & react type superconducting coil 1A is used in a superconducting state after completion, the entire wind & react type superconducting coil 1A is brought into a predetermined low temperature state (below the critical temperature of superconductivity).

<Flowchart of manufacturing method of wind & react type superconducting coil 1A>
The above-mentioned manufacturing method of the wind & react type superconducting coil 1A will be described as a flowchart from the process before the heat treatment to the process after the heat treatment.
FIG. 3 is a diagram showing an example of a flowchart of a method for manufacturing the wind & react type superconducting coil 1A according to the first embodiment of the present invention.
In FIG. 3, steps S100 to S110 will be described in order.

<< Step S100 >>
In step S100, the bobbin 2 (2a, 2b, 2c, 2d) and the ring 3 of the wind & react type superconducting coil 1A shown in FIG. 2A, which is the state before the heat treatment, are installed on the inner peripheral side of the coil winding 4.

<< Step S101 >>
In step S101, the base plate 5 of the wind & react type superconducting coil 1A shown in FIG. 2A and the bobbin 2 (2a, 2b, 2c, 2d) are released from being fixed. That is, the fastening by the fastening mechanism 7 is released.

<< Step S102 >>
In step S102, the heat treatment is started by the heat treatment apparatus. That is, the entire wind & react type superconducting coil 1A is set to a predetermined temperature, for example, a high temperature of 500 ° C. or higher.

<< Step S103 >>
In step S103, the entire wind & react type superconducting coil 1A is maintained at a predetermined temperature, for example, a high temperature of 500 ° C. or higher by a heat treatment apparatus, and a substance in the previous stage that functions as a superconductor is applied to the wire rod of the coil winding 4. React. Then, the coil winding 4 is used as a superconducting wire.

<< Step S104 >>
In step S104, the temperature adjusting mechanism 6A is turned ON. That is, the ring 3 is heated to a predetermined temperature from the coil winding 4.
Then, the ring 3 expands to exert an external force 14A (FIG. 2B) on the bobbin 2 (2a, 2b, 2c, 2d) and press the bobbin 2 (2a, 2b, 2c, 2d) against the coil winding 4. To do.

<< Step S105 >>
Step S105 starts when the coil winding 4 becomes a superconducting wire and reaches the stage where the heat treatment by the heat treatment apparatus started in step S102 is completed.
In step S105, while keeping the temperature adjusting mechanism 6A on, that is, controlling the temperature control heater output of the temperature adjusting mechanism 6A so that the temperature difference between the ring 3 and the coil winding 4 becomes a specified value (predetermined value). , The entire wind & react type superconducting coil 1A is cooled by stopping the heat treatment by the heat treatment apparatus.

<< Step S106 >>
In step S106, it is confirmed that the temperature of the coil winding 4 has reached room temperature (room temperature, a predetermined temperature after cooling) by cooling the entire wind & react type superconducting coil 1A started in step S105. ..

<< Step S107 >>
In step S107, after confirming that the temperature of the coil winding 4 in step S106 has reached room temperature (room temperature, a predetermined temperature after cooling), the temperature adjusting mechanism 6A is turned off (OFF).

<< Step S108 >>
In step S108, it is confirmed that the temperature of the ring 3 has reached room temperature (room temperature, a predetermined temperature after cooling).

<< Step S109 >>
In step S109, the positional relationship between the bobbin 2 (2a, 2b, 2c, 2d), the ring 3, and the coil winding 4 shown in FIG. 2C is such that the bobbin 2 (2a, 2b, 2c, 2d) and the base plate 5 are in a positional relationship. Is refastened by the fastening mechanism 7.

<< Step S110 >>
In step S110, the above heat treatment is completed.

<Supplement and details of how external force 14A is generated>
The method of generating the external force 14A shown in FIG. 2B will be supplemented and explained in detail.
For example, a ring 3 (FIG. 2B) having a diameter of 1 m is made of a non-magnetic nickel alloy having high heat resistance (Monel 400, coefficient of linear expansion 14.2 × 10 ^-6 [1 / K] (between 100 ° C and 21 ° C)). In the configured case, the coil winding 4 and the bobbin 2 (2a, 2b, 2c, 2d) are at room temperature (21 ° C.), whereas the ring 3 is held at 100 ° C. by the temperature adjusting mechanism 6A at room temperature (21 ° C.). The diameter of the ring 3 is 1.12 mm larger than the dimension at 21 ° C.).
Therefore, the bobbins 2a, 2b, 2c, and 2d divided in the circumferential direction can be displaced radially outward by 0.56 mm from the inside.

In the present (first) embodiment in which the ring 3 is arranged radially inside the bobbin 2, the coefficient of linear expansion of the ring 3 is preferably equal to or smaller than the coefficient of linear expansion of the coil winding 4. ..
The reason is that when the coefficient of linear expansion of the ring 3 is larger than the coefficient of linear expansion of the coil winding 4, the ring 3 thermally expands to the size that expands the coil winding 4 during the heat treatment when forming the superconductor, so that the coil winding This is because there is a possibility of damaging the superconducting wire of the wire 4.

<Supplementary details on how to adjust the temperature adjustment mechanism 6A>
The temperature difference between the ring 3 and the coil winding 4 controlled by the temperature adjusting mechanism 6A shown in FIG. 1 is set according to the size of the gap (for example, the gap 11 in FIG. 10) caused by the heat treatment, and the gap is set. The larger the size, the larger the temperature difference is controlled.

<Summary of the first embodiment>
The wind & react type superconducting coil 1A according to the first embodiment of the present invention is divided in the circumferential direction by adopting the structure shown in FIGS. 1 and 2A to 2C and the heat treatment procedure shown in FIG. Unlike the conventional bobbins that are continuous in the circumferential direction, the bobbins 2a to 2d can be independently displaced in the radial direction by an external force 14A (FIG. 2B).
Therefore, after releasing the fixation with the base plate 5, heat treatment by the heat treatment apparatus is started, and an external force 14A due to heating of the temperature adjusting mechanism 6A is applied during the heat treatment, so that the coil winding 4 is as shown in FIG. 2B. It is possible to displace the bobbins 2a to 2d so as to eliminate the gap between them.

In the present invention, the external force 14A shown in FIG. 2B holds the superconducting coil at a specified temperature to generate a superconductor, and then the temperature adjusting mechanism 6A causes a temperature difference between the coil winding 4 and the ring 3. The diameter of the ring 3 is changed so as to be adjusted. By changing the diameter of the ring 3 due to the external force 14A, the ring 3 can be brought into contact with the bobbin 2 (2a, 2b, 2c, 2d) and the gap can be eliminated.
Further, by displacing the bobbins 2a to 2d using the ring 3 continuous in the circumferential direction, the bobbins 2a to 2d, the coil winding 4, and the ring 3 divided in the circumferential direction are arranged concentrically. It becomes possible.
As a further effect of using the ring 3, since the ring made of a uniform material thermally expands while maintaining the shape of a perfect circle, it is divided in the circumferential direction on a concentric circle with respect to the center of the ring 3. It is possible to arrange a plurality of bobbins and coil windings, and it is possible to eliminate the relative displacement of the coil windings inside the superconducting coil.

<Effect of the first embodiment>
According to the first embodiment of the present invention, the gap between the coil members generated after the heat treatment of the wind-and-react type superconducting coil (wind-and-react type superconducting coil) is eliminated, and the coil winding is bobbed inside the superconducting coil. It is possible to provide a highly reliable superconducting coil by avoiding relative displacement with respect to (coil bobbin).

<< Second Embodiment >>
Next, a method for manufacturing the wind & react type superconducting coil and the wind & react type superconducting coil according to the second embodiment of the present invention will be described with reference to FIGS. 4, 5A to 5C, and FIG.
FIG. 4 is a diagram showing a part of a cross section on the IV-IV axis of FIG. 5A, which will be described later when a configuration example of the wind & react type superconducting coil 1B according to the second embodiment of the present invention is viewed from the side. The "part of the cross section" indicates a cross-sectional structure in the IV axis in the four directions from the central axis 22 of FIG. 5A described later. That is, the cross-sectional structure of the wind & react type superconducting coil 1A in the IV axis in the four directions from the central axis 22 in FIG. 5A has the cross-sectional structure shown in FIG. 4 in the four directions.
In FIG. 4, the wind & react type superconducting coil 1B includes bobbin 2 (first bobbin), bobbin 17 (second bobbin, coil bobbin), ring 3, coil winding 4, base plate 5, temperature adjusting mechanism 6B, and fastening. It is configured to include a mechanism 7.

The wind & react type superconducting coil 1B of FIG. 4 is different from the wind & react type superconducting coil 1A of FIG. 1 in that the ring 3 is arranged on the radial outside of the bobbin 2 and on the radial inside of the coil winding 4. This is the point where the bobbin 17 is arranged. The bobbin 17 is used as a winding frame when winding the coil winding 4.
Further, the bobbin 17 is removed together with the temperature adjusting mechanism 6B after the heat treatment is completed.
Further, the temperature adjusting mechanism 6B in FIG. 4 is a cooling means for circulating the refrigerant 23. The temperature adjusting mechanism 6A in FIG. 1 is a heating means, whereas the temperature adjusting mechanism 6B in FIG. 4 is a cooling means.
Further, in FIG. 4, the bobbin 2 and the bobbin 17 are fastened to the base plate 5 by the fastening mechanism 7.

Further, the central axis 22 in FIG. 4 shows the central axis of the wind & react type superconducting coil 1A located at the intersection of the two IV-IV axes in the cross-sectional views of FIGS. 5A, 5B, and 5C described later.
The wind & react type superconducting coil 1B shown in FIG. 4 shows a cross-sectional structure in the IV axis in four directions from the central axis 22 of FIGS. 5A, 5B, and 5C described later. That is, the cross-sectional structure of the wind & react type superconducting coil 1B in the IV axis in the four directions from the central axis 22 of FIGS. 5A, 5B, and 5C has the cross-sectional structure shown in FIG. 4 in the four directions. ..
The horizontal cross section of the VV axis in FIG. 4 has the cross-sectional structures of FIGS. 5A, 5B, and 5C, which will be described later.

5A, 5B, and 5C are views showing a cross section in the VV axis of FIG. 4 when a configuration example of the wind & react type superconducting coil 1B according to the second embodiment of the present invention is viewed from above.
FIG. 5A shows the configuration of the wind & react type superconducting coil 1B before the heat treatment. FIG. 5B shows the configuration of the wind & react type superconducting coil 1B during heat treatment (temperature adjustment mechanism is activated). FIG. 5C shows the configuration of the wind & react type superconducting coil 1B after the heat treatment.
Note that, in FIGS. 5A, 5B, and 5C, the bobbin 2 (2a, 2b, 2c, 2d), the bobbin 17, the ring 3, and the coil winding 4 are shown. However, in FIGS. 5A, 5B, and 5C, which are cross-sectional views of the VV axis of FIG. 4, the base plate 5, the temperature adjusting mechanism 6B, and the fastening mechanism 7 are not shown.
Further, as shown in FIGS. 5A, 5B, and 5C, the bobbin 2 is divided into four bobbins 2a, 2b, 2c, and 2d.

Although not shown in FIGS. 4 and 5A, 5B, and 5C, a heat treatment apparatus that heats and heat-treats the entire wind & react type superconducting coil 1B is a wind & react type superconducting coil manufacturing apparatus. (Not shown) and used in the manufacturing process.
In addition, a temperature measuring device (not shown) that measures the temperature in the atmosphere in which the entire wind & react type superconducting coil 1B is placed and the temperatures of the ring 3, the coil winding 4, and (bobbin 17) is provided. It is installed in the manufacturing equipment for wind and react type superconducting coils and is used in the manufacturing process.

《Before heat treatment》
As described above, FIG. 5A shows the state of the wind & react type superconducting coil 1B before the heat treatment.
In FIG. 5A, the bobbins 2a, 2b, 2c, and 2d are arranged separately. Further, the ring 3 and the bobbins 2a, 2b, 2c, and 2d are arranged apart from each other.
The coil winding 4 is configured by winding a wire rod holding a substance in the previous stage that functions as a superconductor around a bobbin 17.
Further, the bobbins 2a, 2b, 2c, 2d and the bobbin 17 are released from the fastening mechanism 7 with the base plate 5.

《During heat treatment》
As described above, FIG. 5B shows a state in which the wind & react type superconducting coil 1B is undergoing heat treatment. The temperature adjusting mechanism 6B operates as a cooling means.
Although not shown in FIGS. 4 and 5B (FIGS. 5A and 5C), as described above, there is a heat treatment apparatus that heats the entire wind & react type superconducting coil 1B to perform heat treatment. That is, a heat treatment apparatus (not shown) heat-treats the entire wind & react type superconducting coil 1B, and the temperature adjusting mechanism 6B controls the temperature difference between the ring 3 and the coil winding 4.
Heat treatment is performed to make the coil winding 4 of the wind & react type superconducting coil 1B a superconductor. This heat treatment is performed by heating the wind & react type superconducting coil 1B shown in FIGS. 4 and 5B to a high temperature. By this heat treatment, the coil winding 4 holding the substance in the previous stage that functions as a superconductor becomes a superconducting coil.

In addition to this heat treatment, the temperature of the ring 3 is lowered by the cooling means of the temperature adjusting mechanism 6B. Due to the temperature drop by the temperature adjusting mechanism 6B, the ring 3 contracts relatively with respect to the bobbins 2a, 2b, 2c, and 2d. Therefore, the external force 14B shown in FIG. 5B is generated. In the step of heat-treating the entire wind & react type superconducting coil 1B at a high temperature, the ring 3 and the bobbins 2a, 2b, 2c, and 2d both expand, but the ring 3 is cooled by the temperature adjusting mechanism 6B. The expansion coefficient of the ring 3 is lower than the expansion coefficient of the bobbins 2a, 2b, 2c, and 2d. Therefore, as described above, "the ring 3 contracts relatively with respect to the bobbins 2a, 2b, 2c, and 2d."
Further, the temperature adjusting mechanism 6B cools the ring 3 by controlling the ring 3 and the coil winding 4 so as to maintain a specified (predetermined) temperature difference.

The bobbin 2 (2a, 2b, 2c, 2d) receives pressure inward in the radial direction due to the external force 14B indicated by the arrow due to the contraction of the ring 3. The bobbin 2 (2a, 2b, 2c, 2d) is not fastened to the base plate 5.
Since the bobbins 2a to 2d divided in the circumferential direction can be individually displaced in the radial direction, they are displaced inward in the radial direction. Due to this displacement, the bobbin 2 (2a, 2b, 2c, 2d) is brought into close contact with the coil winding 4 to eliminate the gap.
It is important that the bobbins 2 (2a, 2b, 2c, 2d) and the coil winding 4 are in close contact with each other to eliminate the gap, but the bobbins 2a, 2b, 2c, 2d are in close contact with each other. , Not a mandatory requirement.

《After heat treatment》
As described above, FIG. 5C shows the configuration of the wind & react type superconducting coil 1A after the heat treatment.
Since the coil winding 4 of the wind & react type superconducting coil 1B is used as a superconductor, the temperature adjusting mechanism 6B keeps a specified (predetermined) temperature difference between the ring 3 and the coil winding 4 after the heat treatment. The entire wind & react type superconducting coil 1B is cooled by a heat treatment device while adjusting with.
Then, after the temperature of the coil winding 4 returns to room temperature (room temperature, a predetermined temperature after cooling), the temperature adjusting mechanism 6B is turned off (OFF).
After all the components of the wind & react type superconducting coil 1B have returned to room temperature, they are refastened to the bobbin 2 (2a, 2b, 2c, 2d) and the base plate 5 by the fastening mechanism 7.

In the wind-and-react type superconducting coil 1B after heat treatment shown in FIG. 5C, the inner diameter side of the bobbin 2 (2a, 2b, 2c, 2d) and the outer diameter side of the coil winding 4 are in close contact with each other without a gap. That is, it is possible to prevent the coil winding 4 from being displaced relative to the bobbin 2 (2a, 2b, 2c, 2d) inside the wind & react type superconducting coil 1B.
Therefore, it is possible to prevent the superconducting state and the superconducting performance from being lost due to excessive distortion in the coil winding 4 which is the superconducting wire.
In addition, there is a gap between the ring 3 and the bobbin 2 (2a, 2b, 2c, 2d). Further, since a gap is formed between the coil winding 4 and the bobbin 17, the bobbin 17 is deleted after the heat treatment.
When the wind & react type superconducting coil 1B is used in a superconducting state after completion, the entire wind & react type superconducting coil 1B is brought into a predetermined low temperature state (below the critical temperature of superconductivity).

<Flowchart of manufacturing method of wind & react type superconducting coil 1B>
The above-mentioned manufacturing method of the wind & react type superconducting coil 1B will be described as a flowchart from the process before the heat treatment to the process after the heat treatment.
FIG. 6 is a diagram showing an example of a flowchart of a method for manufacturing the wind & react type superconducting coil 1B according to the second embodiment of the present invention.
In FIG. 6, steps S200 to S211 will be described in order.

<< Step S200 >>
In step S200, the bobbins 2 (2a, 2b, 2c, 2d) and the ring 3 of the wind & react type superconducting coil 1B shown in FIG. 5A, which is the state before the heat treatment, are arranged (installed) on the outer peripheral side of the coil winding 4. To do. The coil winding 4 is wound around the bobbin 17. Further, the bobbin 17 corresponds to being arranged (installed) on the inner peripheral side of the coil winding 4.

<< Step S201 >>
In step S201, the base plate 5 of the wind & react type superconducting coil 1B shown in FIG. 5A is released from the bobbin 2 (2a, 2b, 2c, 2d) and the bobbin 17. That is, the fastening by the fastening mechanism 7 is released.

<< Step S202 >>
In step S202, the heat treatment is started. That is, the entire wind & react type superconducting coil 1B is heated to a predetermined temperature, for example, 500 ° C. or higher by the heat treatment apparatus.

<< Step S203 >>
In step S203, the entire wind & react type superconducting coil 1B is maintained at a predetermined temperature, for example, a high temperature of 500 ° C. or higher, and the wire rod of the coil winding 4 is reacted with a substance in the previous stage that functions as a superconductor (). Superconductor generation). Then, the coil winding 4 is used as a superconducting wire.

<< Step S204 >>
In step S204, the temperature adjusting mechanism 6B is turned ON. That is, the ring 3 is lowered by a predetermined temperature from the coil winding 4 (bobbins 2a, 2b, 2c, 2d).
Then, the ring 3 contracts relative to the bobbin 2 (2a, 2b, 2c, 2d), exerts an external force 14B (FIG. 5B) on the bobbin 2 (2a, 2b, 2c, 2d), and the bobbin 2 (FIG. 5B). It acts to press 2a, 2b, 2c, 2d) against the coil winding 4.

<< Step S205 >>
Step S205 starts when the coil winding 4 becomes a superconducting wire and reaches the stage where the heat treatment started in step 202 is completed.
In step S205, while keeping the temperature adjusting mechanism 6B on, that is, controlling the temperature control heater output of the temperature adjusting mechanism 6B so that the temperature difference between the ring 3 and the coil winding 4 becomes a specified value (predetermined value). , The entire wind & react type superconducting coil 1B is cooled by a heat treatment apparatus.

<< Step S206 >>
In step S206, it is confirmed that the temperature of the coil winding 4 has reached room temperature (room temperature, a predetermined temperature after cooling) by cooling the entire wind & react type superconducting coil 1B started in step S205. ..

<< Step S207 >>
In step S207, after confirming that the temperature of the coil winding 4 in step S206 has reached room temperature (room temperature, a predetermined temperature after cooling), the temperature adjusting mechanism 6B is turned off (OFF).

<< Step S208 >>
In step S208, it is confirmed that the temperature of the ring 3 has reached room temperature (room temperature, a predetermined temperature after cooling).

<< Step S209 >>
In step S209, the bobbin 2 (2a, 2b, 2c, 2d), the ring 3, and the coil winding 4 are in a positional relationship as shown in FIG. 5C. Therefore, the bobbin 2 (2a, 2b, 2c, 2d) and the base plate 5 (Fig. 4) is fastened again.

<< Step S210 >>
In step S210, the bobbin 17 is removed.

<< Step S211 >>
In step S211 the above heat treatment is completed.

<Supplement to the coefficient of linear expansion of ring 3>
In the present (second) embodiment in which the ring 3 is arranged radially outside the bobbin 2, it is desirable that the coefficient of linear expansion of the ring 3 is equal to or greater than the coefficient of linear expansion of the coil winding 4.
The reason is that if the thermal expansion of the ring 3 during the heat treatment for producing the superconductor is smaller than the thermal expansion of the coil winding 4, the coil winding 4 is deformed so as to be crushed by the ring 3, and the superconducting wire This is because it may damage the coil.

<Summary of the second embodiment>
The wind & react type superconducting coil 1B of the second embodiment is mainly different from the wind & react type superconducting coil 1A of the first embodiment in the following configuration and control.
That is, in the wind & react type superconducting coil 1B of the second embodiment, as shown in FIGS. 4 to 6, the bobbins 2 (2a, 2b, 2c, 2d) divided in the circumferential direction have the diameter of the coil winding 4. Located on the outer side of the direction, the ring 3 is arranged on the outer side of the bobbin 2 in the radial direction. Further, the temperature adjusting mechanism 6B is a cooling means in which a refrigerant or the like is circulated. Further, a bobbin 17 to be removed after the heat treatment is arranged inside the coil winding 4 in the radial direction. Further, in the cooling process after the superconductor is generated while maintaining the specified (predetermined) temperature, the temperature adjusting mechanism 6B is controlled so that the temperature of the ring 3 is kept lower than that of the coil winding 4.

By adopting such a structure, as shown in FIG. 5B, the ring 3 is thermally shrunk during the heat treatment, and an external force 14B is applied to the bobbin 2 divided in the circumferential direction from the outside in the radial direction to bring it into close contact with the coil winding 4. It becomes possible. With this configuration and control, it is possible to eliminate the gap between the coil members generated by the heat treatment, as in the first embodiment. Further, the bobbin 2 that supports the coil winding 4 can be installed from the outside in the radial direction. The bobbin 17 installed inside the coil winding 4 in the radial direction is used as a winding frame when the coil winding 4 is wound, and can be removed after the heat treatment.

<Effect of the second embodiment>
According to the second embodiment of the present invention, the gap between the coil members generated after the heat treatment of the wind-and-react type superconducting coil (wind-and-react type superconducting coil) is eliminated, and the coil winding is bobbed inside the superconducting coil. It is possible to provide a highly reliable superconducting coil by avoiding relative displacement with respect to the coil.

<< Third Embodiment >>
The wind & react type superconducting coil and the method for manufacturing the wind & react type superconducting coil according to the third embodiment of the present invention will be described with reference to FIGS. 7, 8A to 8C.
FIG. 7 is a diagram showing a part of a cross section of the VII-VII axis of FIG. 8A when a configuration example of the wind & react type superconducting coil 1C according to the third embodiment of the present invention is viewed from the side.
In FIG. 7, the wind & react type superconducting coil 1C includes a bobbin 2, a ring 3B, a coil winding 4, a base plate 5, a temperature adjusting mechanism 6A, and a fastening mechanism 7.

Further, the wind & react type superconducting coil 1C of FIG. 7 is different from the wind & react type superconducting coil 1A of FIG. It was placed independently of.
In FIG. 7, the ring 3B is formed in a circular shape instead of a ring as in the ring 3 (FIG. 2A) as a cross-sectional view in FIG. 8A. The center of the ring 3B having a circular shape is indicated as the reference point 20. Since the ring 3B is formed in a circular shape as described above, the ring 3B also has a ring constituent member at a concentric central portion (reference point 20). This point is different from the ring-shaped ring 3 (FIGS. 2A to 2C) in the first embodiment. The ring 3B can be arranged independently of the base plate 5 by using the ring constituent member at the central portion (reference point 20).
A circular ring 3B (FIG. 7A) is arranged around the reference point 20, and the structures of the bobbin 2, the base plate 5, the temperature adjusting mechanism 6A, and the fastening mechanism 7 are also defined and arranged around the reference point 20. To. Further, the coil winding 4 is wound around the bobbin 2 (2a, 2b, 2c, 2d) as a winding frame.

The temperature adjusting mechanism 6A and the ring 3B are necessary only during the heat treatment, and both of them may be removed after the wind & react type superconducting coil 1C is formed.
Further, the central axis 22 passes through the reference point 20 of the ring 3B having a circular shape. Further, the central axis 22 shows the central axis of the wind & react type superconducting coil 1C located at the intersection of the two VII-VII axes in the cross-sectional views of FIGS. 8A, 8B, and 8C described later.

The wind & react type superconducting coil 1C shown in FIG. 7 shows a cross-sectional structure in the VII axis in four directions from the central axis 22 (reference point 20) of FIGS. 8A, 8B, and 8C described later. That is, the cross-sectional structure of the wind & react type superconducting coil 1C in the VII axis in four directions from the central axis 22 (reference point 20) in FIGS. 8A, 8B, and 8C is the cross-sectional structure shown in FIG. 7 in four directions. have.
The horizontal cross section of the VIII-VIII axis in FIG. 7 has the cross-sectional structure of FIGS. 8A, 8B, and 8C, which will be described later.
In FIG. 7, the bobbin 2 and the coil winding 4 are arranged on the base plate 5. Further, the bobbin 2 is fastened to the base plate 5 by the fastening mechanism 7. The temperature of the ring 3B is adjusted by the temperature adjusting mechanism 6A.
Further, the ring 3B is arranged radially inside the bobbin 2.

8A, 8B, and 8C are views showing a cross section of the wind & react type superconducting coil 1C according to the third embodiment of the present invention in the VIII-VIII axis of FIG. 7 when viewed from above.
FIG. 8A shows the configuration of the wind & react type superconducting coil 1C before the heat treatment. FIG. 8B shows the configuration of the wind & react type superconducting coil 1C during heat treatment (temperature adjustment mechanism is operated). FIG. 8C shows the configuration of the wind & react type superconducting coil 1C after the heat treatment.
The bobbin 2, the ring 3B, and the coil winding 4 are shown in FIGS. 8A, 8B, and 8C. However, in FIGS. 8A, 8B, and 8C, which are cross-sectional views of the VIII-VIII axis of FIG. 7, the base plate 5, the temperature adjusting mechanism 6A, and the fastening mechanism 7 are not shown.
Further, as shown in FIGS. 8A, 8B, and 8C, the bobbin 2 is divided into four bobbins 2a, 2b, 2c, and 2d.

《Before heat treatment》
As described above, FIG. 8A shows the state of the wind & react type superconducting coil 1C before the heat treatment.
In FIG. 8A, the bobbins 2a, 2b, 2c, and 2d are in contact with each other to form the bobbin 2. Further, the ring 3B and the bobbins 2a, 2b, 2c, 2d are arranged apart from each other.
The coil winding 4 is configured by winding a wire rod holding a substance in the previous stage that functions as a superconductor around a bobbin 2.
Further, since the coil winding 4 is configured to be wound around the bobbin 2 (2a, 2b, 2c, 2d), there is a gap between the coil winding 4 and the bobbin 2 (2a, 2b, 2c, 2d). There may be a gap.
Further, the bobbin 2 (2a, 2b, 2c, 2d) and the base plate 5 are released from the fastening mechanism 7.

《During heat treatment》
As described above, FIG. 8B shows a state in which the wind & react type superconducting coil 1C is undergoing heat treatment by a heat treatment apparatus (not shown). The temperature adjusting mechanism 6A operates as a heating means.
In order to make the coil winding 4 of the wind & react type superconducting coil 1C a superconductor, heat treatment is performed by a heat treatment apparatus. This heat treatment is performed by heating the wind & react type superconducting coil 1C shown in FIGS. 7 and 8B to a high temperature. By this heat treatment, the coil winding 4 holding the substance in the previous stage that functions as a superconductor becomes a superconducting coil.

In addition to this heat treatment, the temperature of the ring 3B is further raised by the heating means of the temperature adjusting mechanism 6A. Due to the temperature rise by the temperature adjusting mechanism 6A, the ring 3B expands and the external force 14A shown in FIG. 8B is generated.
The temperature adjusting mechanism 6A heats the ring 3B by controlling the ring 3B and the coil winding 4 so as to maintain a specified (predetermined) temperature difference.
The bobbin 2 (2a, 2b, 2c, 2d) is pressured radially outward by the external force 14A indicated by the arrow due to the expansion of the ring 3B. The bobbin 2 (2a, 2b, 2c, 2d) is not fastened to the base plate 5.
Since the bobbins 2a to 2d divided in the circumferential direction can be individually displaced in the radial direction, they are displaced outward in the radial direction. Due to this displacement, the bobbin 2 (2a, 2b, 2c, 2d) eliminates the gap with the coil winding 4.

《After heat treatment》
As described above, FIG. 8C shows the configuration of the wind & react type superconducting coil 1C after the heat treatment.
After the heat treatment for making the coil winding 4 of the wind & react type superconducting coil 1C a superconductor, the distance between the ring 3B and the coil winding 4 (bobbins 2a, 2b, 2c, 2d) is specified (predetermined). The entire wind & react type superconducting coil 1C is cooled by a heat treatment device while being adjusted by the temperature adjusting mechanism 6A so as to maintain the temperature difference between the two.
Then, after the temperature of the coil winding 4 returns to room temperature (room temperature, a predetermined temperature after cooling), the temperature adjusting mechanism 6A is turned off (OFF).
After all the components of the wind & react type superconducting coil 1C have returned to room temperature (room temperature, a predetermined temperature after cooling), the bobbin 2 (2a, 2b, 2c, 2d) and the base plate 5 are fastened by the fastening mechanism 7. Fasten again.
Also, the ring 3B is removed.

In the wind & react type superconducting coil 1C after heat treatment shown in FIG. 8C, the outer diameter side of the bobbin 2 (2a, 2b, 2c, 2d) and the inner diameter side of the coil winding 4 are in close contact with each other without a gap. That is, it is possible to prevent the coil winding 4 from being displaced relative to the bobbin 2 (2a, 2b, 2c, 2d) inside the wind & react type superconducting coil 1C.
Therefore, it is possible to prevent the superconducting state and the superconducting performance from being lost due to excessive distortion in the coil winding 4 which is the superconducting wire.
When the wind & react type superconducting coil 1C is used in the superconducting state after completion, the entire wind & react type superconducting coil 1C is brought into a predetermined low temperature state (below the critical temperature of superconductivity).

<Summary of the third embodiment>
The wind & react type superconducting coil 1C of the third embodiment is different from the wind & react type superconducting coil 1A of the first embodiment in the following configurations.
That is, in the wind & react type superconducting coil 1C of the third embodiment, as shown in FIGS. 7 to 8C, the ring 3B is not the upper part of the base plate 5, but the reference point 20 independent of the coil winding (superconducting coil) 4. It differs in that it is fixedly placed in.
By adopting such a structure, not only the same effect as that of the first embodiment can be obtained, but also a structure other than the coil winding (superconducting coil) 4 is coiled around the reference point 20 as shown in FIG. 8B. It is possible to define the center position of the wire (superconducting coil) 4. In the third embodiment, the ring 3B is required only at the time of heat treatment, and can be omitted at the time of winding the coil winding 4 and after the heat treatment.

<Effect of the third embodiment>
According to the third embodiment of the present invention, the gap between the coil members generated after the heat treatment of the wind-and-react type superconducting coil (wind-and-react type superconducting coil) is eliminated, and the coil winding is bobbed inside the superconducting coil. It is possible to provide a highly reliable superconducting coil by avoiding relative displacement with respect to (coil bobbin).
Further, it is possible to define the center position of the coil winding (superconducting coil) 4 at the reference point 20 for a structure other than the coil winding 4, which simplifies the manufacturing process.

<< Fourth Embodiment >>
Next, a superconducting electromagnet device including the wind & react type superconducting coil of the present invention will be described.
FIG. 9 is a diagram showing a schematic configuration example of a portion of the superconducting magnet device 40 according to the fourth embodiment of the present invention, which is related to the wind & react type superconducting coil 10.
In FIG. 9, the superconducting magnet device 40 includes a plurality of superconducting coils (wind & react type superconducting coils) 10 (10a, 10b), a vacuum container 41, a radiation shield 42, and a refrigerator 43.
The superconducting coils (wind & react type superconducting coils) 10 (10a, 10b) correspond to the wind & react type superconducting coils 1A to 1C of the first to third embodiments. Further, the central axis 22 of the superconducting magnet device 40 of FIG. 9 coincides with the central axis 22 of the wind & react type superconducting coils 1A, 1B, 1C shown in FIGS. 1, 4, and 7.

In FIG. 9, the wind & react type superconducting coil) 10 (10a, 10b) is included in the radiation shield 42. Further, the radiation shield 42 is included in the vacuum container 41.
The refrigerator 43 penetrates the vacuum container 41 and the radiation shield 42 and is in thermal contact with the wind & react type superconducting coils 10 (10a, 10b).
The wind and react type superconducting coils 10 (10a, 10b) are kept in a superconducting state by being held below the critical temperature of superconductivity by the refrigerator 43, the vacuum container 41, and the radiation shield 42.
By energizing the wind & react type superconducting coil 10 (10a, 10b) from an external power supply device (not shown) of the superconducting magnet device 40, the wind & react type superconducting coil 10 (10a, 10b) is in a superconducting state. Generates a magnetic field. Then, the superconducting magnet device 40 becomes an electromagnet device in a superconducting state with good power efficiency.

<Effect of Fourth Embodiment>
According to the fourth embodiment of the present invention, it is possible to provide a highly reliable and power-efficient superconducting electromagnet device.

<< Other Embodiments >>
The present invention is not limited to the embodiments described above, and further includes various modifications. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to those having all the described configurations. Further, it is possible to replace a part of the configuration of one embodiment with a part of the configuration of another embodiment, and further, add a part or all of the configuration of another embodiment to the configuration of one embodiment. It is also possible to delete / replace.
Hereinafter, other embodiments and modifications will be further described.

《Bobbin split》
In the first to third embodiments, an embodiment in which the bobbin 2 is divided into four (2a, 2b, 2c, 2d) is shown. However, it is not limited to four divisions. For example, it can be divided into 3 or 5 or more.

《Bobbin and coil winding》
In the first embodiment, as shown in FIG. 1, the arrangement relationship between the bobbin 2 and the coil winding 4 is secured by the base plate 5 and the fastening mechanism 7.
However, the base plate 5 and the fastening mechanism 7 are not limited to being indispensable elements as a method for forming the arrangement relationship between the bobbin 2 and the coil winding 4 shown in FIG. 2C. As long as the arrangement relationship between the bobbin 2 and the coil winding 4 shown in FIG. 2C can be secured by another mechanism, another method may be used.

"ring"
In the first embodiment, when the arrangement relationship between the bobbin 2 and the coil winding 4 shown in FIG. 2C can be secured, the ring 3 in FIG. 2C is not an indispensable component. If the ring 3 can be removed, it may be removed.

《Ring material》
In the description of the first embodiment, the material of the ring 3 is a non-magnetic nickel alloy having high heat resistance (Monel 400, coefficient of linear expansion 14.2 × 10 ^-6 [1 / K] (between 100 ° C and 21 ° C)). However, the case is not limited to the above-mentioned nickel alloy. Other metals and alloys may be used.

<< Removal of parts after manufacturing process >>
An example in which the bobbin 17 and the temperature adjusting mechanism 6A are removed after the heat treatment in the production of the wind & react type superconducting coil of the second embodiment is shown. Further, an example in which the ring 3B and the temperature adjusting mechanism 6B are removed after the heat treatment in the production of the wind & react type superconducting coil of the third embodiment is shown. However, what can be removed after the heat treatment in manufacturing is not limited to the above-mentioned parts. For example, it is also possible to remove the base plate 5 and the fastening mechanism 7.

<< Material of wind & react type superconducting coil >>
In the first embodiment, magnesium diboride (MgB ₂ ) is shown as an example of the material of the superconductor of the wind & react type superconducting coil, but the material is not limited to magnesium diboride. For example, niobium titanium (NbTi), tin niobium acid (Nb ₃ Sn), bismuth-based superconductor (BSCCO), and yttrium-based superconductor (YBCO) may be used.

<< Heat treatment temperature by heat treatment equipment >>
In the method for manufacturing the wind & react type superconducting coil 1A of the first embodiment, the heat treatment temperature by the heat treatment apparatus was described as 500 ° C. or higher in step S103, but the above temperature depends on the material of the substance forming the superconductor. Not limited to. In some cases, superconductors are formed at temperatures below 500 ° C.
Further, the heat treatment temperature by the heat treatment apparatus is not always a constant temperature. In the first half, middle, and second half of the heat treatment, the heat treatment temperature may be changed as appropriate.
Further, the time for maintaining the high temperature at which the superconductor is formed may be set variously depending on the material of the substance forming the superconductor.

<< Cooling temperature of heat treatment equipment >>
In the method for manufacturing the wind & react type superconducting coil 1A of the first embodiment, after the formation of the superconductor, the temperature of the coil winding 4 returns to room temperature (room temperature, a predetermined temperature after cooling), and then the temperature adjusting mechanism He explained that he would turn off 6A.
However, turning off the temperature adjusting mechanism 6A is not limited to room temperature (room temperature). Once the wind & react type superconducting coil 1A has a predetermined shape, it may be moved to the next step (for example, the temperature adjusting mechanism 6A is turned off) from the viewpoint of work efficiency without returning to room temperature (room temperature).

《Application of wind & react type superconducting coil》
In the fourth embodiment, an example in which the wind & react type superconducting coil of the present invention is provided in the superconducting magnet device has been described. However, the application (application) of the wind & react type superconducting coil of the present invention is not limited to the superconducting electromagnet device. For example, it can be applied to a coil of a rotating device of an electric motor (motor) or a generator. It can also be applied to magnetic levitation type railway coils and superconducting coils of NMR and SMES (Superconducting Magnetic Energy Storage). Further, as a superconducting magnet device, it can be widely deployed in accelerator magnets, MRI magnets, and the like.

1A, 1B, 1C, 10, 10a, 10b Wind & React type superconducting coil 2,2a, 2b, 2c, 2d Bobbin, 1st bobbin 3,3B Ring 4 Coil winding 5 Base plate 6A, 6B Temperature control mechanism 7 Fastened Mechanism 17 Bobbin, 2nd bobbin 27 Bobbin 40 Superconducting electromagnet device 41 Vacuum container 42 Radiation shield 43 Refrigerator

Claims (15)

A bobbin divided into multiple parts in the circumferential direction,
A coil winding in which a wire rod that functions as a superconductor in a predetermined environment is wound around the bobbin,
A ring arranged inside the bobbin concentrically with the bobbin,
With
The outer diameter side of the bobbin and the inner diameter side of the coil winding are in close contact with each other.
A wind and react type superconducting coil that features this. In claim 1,
The base plate to which the bobbin is fixed and
A fastening mechanism for fastening the bobbin and the base plate,
To prepare
A wind and react type superconducting coil that features this. In claim 1 or 2,
The bobbin is divided into four parts.
A wind and react type superconducting coil that features this. A bobbin divided into multiple parts in the circumferential direction,
A wire rod that functions as a superconductor in a predetermined environment is placed on the inner diameter side of the bobbin with a coil winding.
A ring arranged on the outside of the bobbin concentrically with the bobbin,
With
The inner diameter side of the bobbin and the outer diameter side of the coil winding are in close contact with each other.
A wind and react type superconducting coil that features this. In claim 4,
The base plate to which the bobbin is fixed and
A fastening mechanism for fastening the bobbin and the base plate,
To prepare
A wind and react type superconducting coil that features this. In claim 1 or 2,
The coefficient of thermal expansion of the ring is equal to or less than the coefficient of thermal expansion of the coil winding.
A wind and react type superconducting coil that features this. In claim 4 or 5,
The coefficient of thermal expansion of the ring is equal to or greater than the coefficient of thermal expansion of the coil winding.
A wind and react type superconducting coil that features this. In claim 1 or 4,
The coil winding comprises magnesium niboride.
A wind and react type superconducting coil that features this. A wind and reactor including a bobbin divided into a plurality of parts in the circumferential direction, a coil winding in which a wire rod functioning as a superconductor is wound around the bobbin, and a ring arranged concentrically with the bobbin inside the bobbin. The type superconducting coil heats the base plate on which the bobbin is arranged, the fastening mechanism for fastening the bobbin to the base plate, the temperature adjusting mechanism for adjusting the temperature of the ring, and the entire wind & react type superconducting coil. This is a method for manufacturing a wind and react type superconducting coil, which is manufactured by using a heat treatment device that performs heat treatment.
The bobbin, the ring, and the coil winding are arranged on the base plate.
Release the fastening between the base plate and the bobbin,
A predetermined temperature at which the pre-stage material in which the heat treatment apparatus functions as the superconductor held in the coil winding, including the bobbin, the coil winding, the ring, and the base plate, produces a superconductor. Is added and heat-treated to hold for a predetermined time.
The heat treatment apparatus includes the bobbin, the coil winding, the ring, and the base plate while turning on and adjusting the temperature adjusting mechanism so as to maintain a predetermined temperature difference between the ring and the coil winding. Cool and
After the temperature of the coil winding returns to room temperature, the temperature adjustment mechanism is turned off.
After the bobbin, the coil winding, the ring, and the base plate have returned to room temperature, the bobbin and the base plate are refastened.
A method of manufacturing a wind and react type superconducting coil, which is characterized by this. A first bobbin divided into a plurality of parts in the circumferential direction, a coil winding in which a wire rod functioning as a superconductor is arranged on the inner diameter side of the first bobbin, and the first bobbin concentrically with the first bobbin. A wind-and-react type superconducting coil having a ring arranged on the outside of the bobbin is arranged with a second bobbin temporarily arranged on the inner diameter side of the coil winding, and the first bobbin and the second bobbin. The base plate, the fastening mechanism for fastening the first bobbin and the second bobbin to the base plate, the temperature adjusting mechanism for adjusting the temperature of the ring, and the entire wind & react type superconducting coil are heated. This is a method for manufacturing a wind & react type superconducting coil, which is manufactured by using a heat treatment device that performs heat treatment.
The first bobbin, the coil winding, the second bobbin, and the ring are arranged on the base plate.
The fastening of the base plate, the first bobbin, and the second bobbin by the fastening mechanism is released.
A pre-stage substance in which the heat treatment apparatus functions as the superconductor held in the coil winding, including the first bobbin, the coil winding, the second bobbin, the ring, and the base plate. Is heat-treated to generate a superconductor by applying a predetermined temperature and holding it for a predetermined time.
While adjusting by the temperature adjusting mechanism so as to maintain a predetermined temperature difference between the ring and the coil winding, the heat treatment apparatus uses the first bobbin, the coil winding, the second bobbin, and the ring. Cool including the base plate and
After the temperature of the coil winding returns to room temperature, the temperature adjustment mechanism is turned off.
After the first bobbin, the coil winding, the second bobbin, the ring, and the base plate have returned to room temperature, the first bobbin and the base plate are refastened.
Remove the second bobbin,
A method of manufacturing a wind and react type superconducting coil, which is characterized by this. A wind-and-react type superconducting coil including a bobbin divided into a plurality of parts in the circumferential direction and a coil winding in which a wire rod functioning as a superconductor is wound around the bobbin is arranged inside the bobbin concentrically with the bobbin. A ring having a ring component also in the center of the concentric circle, a base plate on which the bobbin is arranged, a fastening mechanism for fastening the bobbin to the base plate, and a temperature adjusting mechanism for adjusting the temperature of the ring. A method for manufacturing a wind & react type superconducting coil, which is manufactured by using a heat treatment apparatus that heats the entire wind & react type superconducting coil to perform heat treatment.
The bobbin and the coil winding are arranged on the base plate.
Release the fastening between the base plate and the bobbin,
A predetermined temperature at which the pre-stage material in which the heat treatment apparatus functions as the superconductor held in the coil winding, including the bobbin, the coil winding, the ring, and the base plate, produces a superconductor. Is added and heat-treated to hold for a predetermined time.
The heat treatment apparatus includes the bobbin, the coil winding, the ring, and the base plate while turning on and adjusting the temperature adjusting mechanism so as to maintain a predetermined temperature difference between the ring and the coil winding. Cool and
After the temperature of the coil winding returns to room temperature, the temperature adjustment mechanism is turned off.
After all the members constituting the coil winding have returned to room temperature, the bobbin and the base plate are refastened.
Remove the ring,
A method of manufacturing a wind and react type superconducting coil, which is characterized by this. In claim 9 or 11.
The temperature adjusting mechanism is a heating means.
A method of manufacturing a wind and react type superconducting coil, which is characterized by this. In claim 10,
The temperature adjusting mechanism is a cooling means.
A method of manufacturing a wind and react type superconducting coil, which is characterized by this. In any one of claims 9 to 11.
A predetermined temperature at which a substance in the previous stage that functions as the superconductor held in the coil winding produces a superconductor is 500 ° C. or higher.
A method of manufacturing a wind and react type superconducting coil, which is characterized by this. The wind & react type superconducting coil according to any one of claims 1 to 5 is provided.
A superconducting electromagnet device characterized by this.

Images