JP7333978B1 - Linear material protection member - Google Patents

Abstract

An object of the present invention is to provide a linear material protection member that prevents damage to a linear material and is deformable. A protection member 100 includes a plurality of blocks 20 that surround and hold a superconducting wire 10, and a wire 31 that is engaged with the plurality of blocks 20. Each of the plurality of blocks 20 includes a holding space 21 that holds the superconducting wire 10, a ceiling part 22 covering the holding space 21, and a bottom part 23 located on the opposite side of the ceiling part 22 with the holding space 21 interposed therebetween. and a side wall portion 24 that is continuous with each of the ceiling portion 22 and the bottom portion 23. A groove 31T extending in the direction in which the wire 31 extends and into which the wire 31 can be engaged is formed in any one of the ceiling part 22, the bottom part 23, and the side wall part 24. The plurality of blocks 20 are connected to each other via wires 31 engaged in grooves 31T. An opening 25 communicating with the holding space 21 is formed on the opposite side of the side wall 24 . The opening 25 extends across the plurality of blocks 20 along the direction in which the wire 31 extends. [Selection diagram] Figure 3

Description

The present invention relates to a linear material protection member for holding linear material.

Japanese Patent Application Laid-Open No. 2019-102298 (Patent Document 1) describes a superconductor in which a plurality of superconducting tape wires bundled in a laminated state are inserted into a flexible tube. Further, Patent Document 1 describes a forming method in which a superconducting material is formed into a coil shape and then the laminated superconducting tape wire is molded with a molding member made of resin or metal.

JP 2019-102298 A

For example, as an application of linear materials such as electric wires and pipes, there are applications in which linear materials are used by being deformed, for example, by winding them around structures. When using linear materials in such applications, it is necessary to prevent the linear materials themselves from being damaged due to external forces during winding or forces applied after winding. On the other hand, the linear material needs to be deformable in order to wrap around the structure. Therefore, as a protective member for protecting the linear material, a protective member having a deformable structure while preventing damage to the linear material was investigated.

In one embodiment, a linear material protection member includes a plurality of blocks for surrounding and retaining a linear material, and a first wire engaged with the plurality of blocks. Each of the plurality of blocks includes a holding space for holding the linear material, a ceiling portion covering the holding space, a bottom portion located on the opposite side of the ceiling portion via the holding space, and the sidewalls contiguous with each of the ceiling and the bottom. A first groove extending in a first direction and capable of engaging the first wire is formed in one of the ceiling portion, the bottom portion, and the side wall portion. The plurality of blocks are connected to each other via a first wire engaged with the first groove. A first opening communicating with the holding space is formed on the opposite side of the side wall portion through the holding space. The first opening is formed so as to extend across the plurality of blocks along the first direction when the plurality of blocks are connected.

Exemplary embodiments of the present invention provide linear material protection members that prevent linear material damage and are deformable.

FIG. 4 is an explanatory diagram showing a structural example of a linear material held by a protective member according to one embodiment; FIG. 2 is an explanatory diagram showing a state in which the superconducting wire shown in FIG. 1 is held by a protective member according to one embodiment; FIG. 3 is a cross-sectional view taken along line AA shown in FIG. 2; FIG. 3 is an enlarged view showing a state in which the superconducting wire and protective member shown in FIG. 2 are wound around a core material of a coil; FIG. 5 is a cross-sectional view taken along line BB of FIG. 4; FIG. 6 is a cross-sectional view showing a modification of the coil shown in FIG. 5; FIG. 4 is a side view of the protective member shown in FIG. 3, and is a side view seen from the side wall portion opposite to the opening into which the superconducting wire can be inserted; FIG. 7 is a cross-sectional view showing a modified example of the superconducting wire winding structure shown in FIG. 6 ; FIG. 3 is an explanatory view showing a modification of the superconducting wire shown in FIG. 1; FIG. 10 is an explanatory diagram showing a state in which the superconducting wire rod shown in FIG. 9 is held by the protective member according to the present embodiment; FIG. 11 is a cross-sectional view taken along line CC shown in FIG. 10; 12 is an exploded assembly view of the protective member and the superconducting wire shown in FIG. 11; FIG. FIG. 12 is a cross-sectional view showing a state in which the member of the ceiling portion and the member of the side wall portion shown in FIG. 11 are fixed via a wire; 12 is an enlarged cross-sectional view showing an example of a state in which the superconducting wire and protective member shown in FIG. 11 are wound around a core material of a coil; FIG.

The inventor of the present application is conducting research and development of a nuclear fusion reactor that causes a nuclear fusion reaction by confining high-temperature, high-density plasma in the reactor. As part of this, we are investigating the use of high-temperature superconducting tape wires as the material for the coils that generate the magnetic field to confine the plasma in the reactor. The technology described below is a technology that can be used as a protective member for various linear materials such as electric wires, pipes, etc. in addition to high-temperature superconductors. Embodiments are taken and described. Further, in the following description, the change of a superconductor from a superconducting state to a normal conducting state may be referred to as "quenching".

<Superconducting wire>
In the present application, a superconductor exhibiting superconductivity at 77K or higher is called a high-temperature superconductor. Hereinafter, these are simply referred to as "superconductor", "superconductor layer", "superconducting tape wire", or "superconducting wire", all of which are materials containing high-temperature superconductors. A superconducting tape wire (specifically, a high-temperature superconducting tape wire) is a tape material in which a superconducting layer (specifically, a high-temperature superconducting layer) is formed on a metal tape with a thickness of about 100 micrometers. When a superconducting tape wire is used as a coil, for example, a plurality of superconducting tape wires are laminated and bundled to form a superconducting wire (specifically, a high-temperature superconducting wire), and the superconducting wire is formed into a coil shape to form a superconducting coil ( Specifically, it is called a high-temperature superconducting coil). In addition, for example, when it is necessary to generate a strong magnetic field, such as a coil used in a nuclear fusion reactor or a high-energy particle accelerator, it is possible to use a laminated coil in which multiple superconducting wires are wound in a laminated manner. be.

The superconducting wire includes, for example, a flexible tube that bundles laminated superconducting tape wires. A flexible tube is formed, for example, by winding a metal strip around a laminated superconducting tape wire. Further, as described in the above-mentioned Patent Document 1, when superconducting tape wires laminated by a molding member made of resin or low-melting-point metal are molded after molding a superconducting wire, compared with a single superconducting tape wire , can improve strength.

However, according to the study of the inventor of the present application, when the superconducting wire is formed into a complicated shape, the external force applied to the superconducting wire and the stress generated in the superconducting wire are large, so it is necessary to further improve the strength. For example, in the case of a coil used in a helical fusion reactor, the superconducting wire is wound in a coil shape so as to be twisted, so a strong force is likely to be applied during the winding operation, and the stress generated in the superconducting wire increases. Also, a strong external force may be applied to the superconducting wire after it is formed into a coil shape. For example, when a large current is passed through a superconducting coil, a strong external force such as the Lorentz force may be applied to the superconducting wire due to the magnetic field generated around the coil. Therefore, there is a need for a protective member capable of preventing damage to the superconducting wire.

On the other hand, in order to prevent damage to the superconducting wire, for example, if the superconducting wire is housed in a metal pipe, the superconducting wire can be protected, but processing such as bending becomes difficult.

The technology described below can be applied to various uses as described above, but it is a particularly effective technology when applied to a protective member that protects a superconducting wire used in a compact such as a superconducting coil. Moreover, below, when laminating|stacking several superconducting wires, the technique especially effective is also demonstrated.

FIG. 1 is an explanatory diagram showing a structural example of a linear material held by a protective member according to one embodiment. As shown in FIG. 1, the linear material of the present embodiment includes a superconducting wire 10 including a plurality of laminated superconducting tape wires 11 and a metal band 12 wound around the laminate of the plurality of superconducting tape wires 11. is. Although FIG. 1 illustrates a state in which 32 superconducting tape wires 11 are laminated, the number of superconducting tape wires laminated is not limited to the example shown in FIG. It can be determined according to the specification of the value. For example, as a modification of the present embodiment, the number of layers of the superconducting tape wire 11 may be 31 or less, or 33 or more.

The superconducting tape wire 11 is a tape wire in which a superconductor layer (specifically, a high-temperature superconductor layer) is formed on a metal tape of about several tens of μm. In the example shown in FIG. 1, the thickness of the superconducting tape wire 11 is about 0.1 mm, and the width of the superconducting tape wire 11 is about 4 mm. The thickness and width of the superconducting tape wire 11 are examples, and various modifications are applicable. Each of the plurality of superconducting tape wires 11 is laminated in such a manner that they are not adhered to each other and can be displaced from each other. As a result, the superconducting wire 10, which is a laminate of a plurality of superconducting tape wires 11, can be formed into, for example, a coil shape. Although illustration is omitted, as a modification to FIG. 1, a plurality of superconducting tape wire rods 11 may be bundled using a wire or the like (not shown). In this case, the handleability of the laminate is improved. On the other hand, from the viewpoint of improving the degree of freedom of movement of the plurality of superconducting tape wires 11 in the tube made of the metal strip 12, the stack of the plurality of superconducting tape wires 11 is not bound as in the present embodiment. is preferred.

A laminate of a plurality of superconducting tape wires 11 is inserted into a tubular metal strip 12 . In the example shown in FIG. 1, the metal strip 12 has a thickness of, for example, about 100 μm to several hundred μm, and a width of about 3 to 5 mm. Moreover, in a cross-sectional view shown in FIG. 3, which will be described later, the metal band 12 is formed to have a cylindrical shape. Hereinafter, the structure composed of the metal band 12 may be called a tube. The tube has an outer diameter of, for example, 6 mm and an inner diameter of, for example, 5.2 mm. Although the tube is a cylindrical body made of metal, it is possible to form the tube into a coil shape if it has such a thickness. The metal band 12 functions as a binding member that binds the superconducting tape wires 11 so as not to scatter them. However, each of the plurality of superconducting tape wires 11 can move freely to some extent within the tube formed by the metal strip 12 .

Further, in the example shown in FIG. 1, the shape of the metal strips 12 surrounding the laminate is spring-shaped, and gaps are provided between adjacent metal strips 12 . As will be described later, after forming the superconducting wire 10 into a coil shape, when molding a laminate of a plurality of superconducting tape wires 11 with a molding member (sealing material 41 shown in FIG. 6, which will be described later), the molding member is An opening is required to lead into the tube of metal band 12 . When gaps are provided between adjacent metal strips 12 as shown in FIG. 1, a molding member can be introduced through the gaps to mold a laminate of a plurality of superconducting tape wires 11 .

However, as a modification to FIG. 1, the metal band 12 may be wound so that a portion thereof overlaps. In this case, when a laminate of a plurality of superconducting tape wires 11 is to be molded, it is preferable to provide an opening for introducing a molding member at one or a plurality of locations of the tube composed of the metal strip 12 .

There is also a method in which the superconducting wire 10 shown in FIG. 1 is wound directly around the core of a coil to form a coil shape. However, according to the study of the inventors of the present application, it has been found that when the superconducting wire 10 is directly wound around the core material of the coil, the superconducting wire 10 may be damaged during the winding work. It was also found that when the superconducting wire 10 is wound in a plurality of layers around the core material of the coil, the position of the superconducting wire 10 laminated may be shifted.

Therefore, the inventors of the present application have studied protective members for protecting the superconducting wire 10 . The functions required of the protective member are as follows. First, when superconducting wire 10 is formed (for example, into a coil shape), the protective member itself must be deformable. Secondly, it is necessary to have a structure capable of preventing damage to superconducting wire 10 when forming superconducting wire 10 (for example, into a coil shape). Moreover, when the superconducting wire 10 is wound in a plurality of layers, it is preferable to be able to prevent the superconducting wire 10 from being displaced. Moreover, when attaching the superconducting wire 10 to the protective member, it is preferable that the attachment of the superconducting wire 10 is easy. Also, a large current flows through the superconducting wire 10 . At this time, it is preferable to have a structure in which the components of the protective member are less likely to be damaged by the influence of the electromagnetic force generated around superconducting wire 10 .

<Protective material>
FIG. 2 is an explanatory diagram showing a state in which the superconducting wire shown in FIG. 1 is held by the protective member according to the present embodiment. 3 is a cross-sectional view taken along line AA shown in FIG. 2. FIG. In the following, as shown in FIG. 2, the direction in which the superconducting wire 10 extends is the X direction, the direction intersecting the X direction in plan view (the direction perpendicular to the X direction in the example shown in FIG. 2) is the Y direction, and the X The normal direction of the XY plane including the direction and the Y direction (sometimes referred to as the thickness direction) will be described as the Z direction.

As shown in FIG. 2, the protection member 100 of the present embodiment includes a plurality of blocks 20 for surrounding and holding a superconducting wire 10 made of a linear material, and wires 30 engaged with the plurality of blocks 20. and In the example shown in FIG. 2 , the protective member 100 has three wires 30 . Wire 30 is made of metal. Examples of the metal material forming the wire 30 include so-called stainless steel (such as SUS304), titanium (Ti), and titanium alloys. The wire diameter of the wire 30 is, for example, about 1.5 mm.

The protective member 100 of the present embodiment can be divided into a plurality of blocks 20 and has a structure in which the plurality of blocks 20 are connected via wires 30 . For this reason, when the protective member 100 holding the superconducting wire 10 (in other words, a linear material with a protective member) is wound around, for example, the core material of the coil, gaps should be formed at the boundaries of the plurality of blocks 20 as necessary. can be done. As a result, the protective member 100 can be deformed and wound around a structure such as a core. In other words, the plurality of blocks 20 have a deformable structure like a spine.

The wire 30 functions as a reinforcing member for suppressing damage to the superconducting wire 10 due to a pulling force when the superconducting wire 10 accommodated in the protective member 100 is wound around, for example, a core material of a coil. Therefore, the wires 30 are arranged so as to extend in the same direction as the extending direction of the superconducting wire (in the case of FIG. 2, the X direction). At least one wire 30 is sufficient, but a plurality of wires 30 as shown in FIG.

Each of the plurality of blocks 20 includes, as shown in FIG. and side wall portions 24 contiguous with each of the ceiling portion 22 and the bottom portion 23 . In the example of this embodiment, each of the ceiling portion 22, the bottom portion 23, and the side wall portion 24 is formed as a single piece. However, as will be described later as a modified example, some of the ceiling portion 22, the bottom portion 23, and the side wall portion 24 may be composed of a plurality of parts that can be disassembled. Each of the ceiling portion 22, the bottom portion 23, and the side wall portion 24 is made of a metal material. Examples of the metal material forming the ceiling portion 22, the bottom portion 23, and the side wall portion 24 include titanium (Ti), a titanium alloy, and the like. In particular, in the case of a protective member made of a linear material through which a large current flows, such as the superconducting wire 10, it is preferably made of a non-magnetic material. Considering the hardness, workability, and non-magnetic properties of the material, the ceiling portion 22, the bottom portion 23, and the side wall portion 24 may be formed using stainless steel (such as SUS304, etc.) in addition to the titanium alloy described above. can also

A groove for engaging the wire 30 is formed in at least one of the ceiling portion 22 , the bottom portion 23 and the side wall portion 24 . In the example shown in FIG. 3, three wires 30 are engaged, so grooves are formed for engaging each of the three wires 30 . Specifically, a groove 31T with which the wire 31 can be engaged is formed at the boundary between the ceiling portion 22 and the side wall portion 24 . A groove 32T with which the wire 32 can be engaged is formed at the boundary between the bottom portion 23 and the side wall portion 24 . Further, a groove 33T with which the wire 33 can be engaged is formed on the opposite side of the groove 32T in the Y direction. A groove 33 T is formed in the bottom portion 23 . As shown in FIG. 2, the blocks 20 are connected to each other via wires 31, 32 and 33 engaged in the grooves. Moreover, each of the grooves 31T, 32T, and 33T shown in FIG.

The superconducting wire 10 is wound around the core material of the coil while being held by the protective member 100 . Since superconducting wire 10 is reinforced by a plurality of wires 30 during this work, damage to superconducting wire 10 due to external force during the work can be prevented or suppressed.

Further, as shown in FIG. 3 , an opening 25 communicating with the holding space 21 is formed on the opposite side of the side wall 24 with the holding space 21 interposed therebetween. As shown in FIG. 2, the opening 25 is formed so as to extend across the blocks 20 along the X direction when the blocks 20 are connected. Therefore, superconducting wire 10 can be inserted into holding space 21 through opening 25 . In other words, each of the plurality of blocks 20 has a structure in which superconducting wire 10 can be inserted into holding space 21 (see FIG. 3) through opening 25 .

If opening 25 is not provided, a direction of inserting superconducting wire 10 into holding space 21 formed as a through hole is also conceivable. However, in this case, the operation of attaching protective member 100 to superconducting wire 10 is complicated, and the risk of damaging superconducting wire 10 during the insertion operation increases. On the other hand, according to the present embodiment, since opening 25 is provided, superconducting wire 10 can be easily arranged in holding space 21 . As a result, damage to superconducting wire 10 during the work of disposing superconducting wire 10 in holding space 21 can be suppressed.

Also, although the details will be described later, when the superconducting wire 10 is used as a superconducting coil, a large current flows through the superconducting wire 10 . In this case, an electromagnetic force may occur around superconducting wire 10 . In the case of the protective member 100 of the present embodiment, as shown in FIG. 3, in a cross-sectional view, it has an arched shape including a ceiling portion 22, a bottom portion 23, and a side wall portion 24. As shown in FIG. Therefore, it has high strength against the external force acting in the Y direction shown in FIG.

<Application to coil>
Next, as an example of a method of using superconducting wire 10 of the present embodiment, an embodiment applied to a superconducting coil will be described. FIG. 4 is an enlarged view showing a state in which the superconducting wire and protective member shown in FIG. 2 are wound around the core material of the coil. 5 is a cross-sectional view taken along line BB of FIG. 4. FIG.

When the superconducting wire 10 shown in FIGS. 2 and 3 is used as an electric wire for a coil, as illustrated in FIG. 4, the superconducting wire 10 protected by the protective member 100 is wound around the core material 40 to form a coil shape. do. The core material 40 is, for example, a circular member in plan view, and the superconducting wire 10 is wound around the side surface of the core material 40 to form an arc shape. The radius of the core material 40 is, for example, approximately 5 to 20 cm. At this time, since the protective member 100 is composed of a plurality of blocks 20 , it can be wound along the outer circumference of the core material 40 . Therefore, superconducting wire 10 is wound around core 40 while being held by protective member 100 .

When the work of winding superconducting wire 10 around core material 40 is performed while protecting superconducting wire 10 with protective member 100 in this way, damage to superconducting wire 10 during the winding work can be suppressed. For example, in order to wind along the outer periphery of the core material 40, it is necessary to wind the superconducting wire 10 or the protective member 100 while applying tension by pulling. When superconducting wire 10 is pulled and wound, there is a risk that superconducting wire 10 will be damaged, but in the case of the present embodiment, wire 30 can be pulled to apply tension. Since the wire 30 is engaged with each of the plurality of blocks 20 , when the wire 30 is pulled, the shape of the superconducting wire 10 held by the plurality of blocks 20 is changed into an arc shape along the outer periphery of the core material 40 . can do. That is, according to the present embodiment, superconducting wire 10 can be wound around core 40 without pulling superconducting wire 10, so damage to superconducting wire 10 during the winding operation can be prevented or suppressed.

From the viewpoint of winding protective member 100 along the outer circumference of core material 40 of the coil as in the present embodiment, it is preferable that the length of each of blocks 20 is not extremely long. In the case of this embodiment, each size of the plurality of blocks 20 shown in FIG. 2 is the same, and for example, the length 20L in the X direction is 30 mm. Further, for example, the width 20W of the block 20 in the Y direction is 12.5 mm. Although various modifications can be applied to the length 20L and width 20W of the block 20, the length 20L is preferably 50 mm or less, particularly preferably 30 mm or less, in consideration of the ease of winding work.

Further, as shown in FIG. 5, when a large current is applied to each of a plurality of superconducting wires 10 arranged adjacent to each other at the same time, a stronger electromagnetic force is generated as the center of the arrangement of the plurality of superconducting wires 10 is closer. . In the case of the example shown in FIG. 5, stronger electromagnetic force is generated in the Y direction as the central superconducting wire among the three superconducting wires 10 is approached. As described with reference to FIG. 3, in the case of the protection member 100 of the present embodiment, the provision of the openings 25 makes it arch-shaped in a cross-sectional view. In this case, it has high strength against the external force acting in the Y direction shown in FIG. Therefore, according to the present embodiment, even if a strong electromagnetic force is generated in the Y direction, it is possible to prevent or suppress damage to the protective member 100 due to the electromagnetic force.

<Modification 1>
FIG. 6 is a cross-sectional view showing a modification of the coil shown in FIG. 7 is a side view of the protective member shown in FIG. 3, and is a side view seen from the side wall portion opposite to the opening into which the superconducting wire can be inserted. In the modification shown in FIG. 6, a laminate of a plurality of superconducting tape wires 11 (see FIG. 3) in which superconducting wires 10 are laminated is sealed by a sealing material 41 impregnated in a holding space 21 (see FIG. 3). is different from the example shown in FIG. As the sealing material 41, for example, a resin material or a metal material can be used. Sealing material 41 is filled, for example, after forming superconducting wire 10 and protective member 100 into a coil shape. As a result, the operation of winding the superconducting wire 10 around the core 40 can be performed in a state in which the protection member 100 is easily bendable, and the protection member 100 can be reinforced after being formed into a coil shape. By filling the holding space 21 with the sealing material 41, it is possible to prevent the positional deviation of the superconducting wire 10 after the winding operation.

A material used as the sealing material 41 can be, for example, a resin material or a metal material. When a resin material is used as the sealing material 41, the filling property of the sealing material 41 is improved. On the other hand, when a metal material is used as the sealing material 41, the reinforcing effect of the protective member 100 is improved.

In the case of this embodiment, the sealing material 41 is a conductive metal material. It is preferable to use a conductive material such as metal as the sealing material 41 in the following points. When a large number of superconducting wires 10 are used as coils, it is conceivable that some of the large number of superconducting wires 10 may be quenched. At this time, if each of the plurality of superconducting wires 10 is electrically connected via the conductive material used as the sealing material 41, some of the superconducting wires 10 that have changed to the normal conducting state will be superconducting. It is possible to advect the current to the superconducting wire 10 that maintains its state. As a result, deterioration in performance of the coil as a whole can be suppressed.

In order to electrically connect a plurality of superconducting wires 10 via sealing material 41 , it is preferable that a part of protective member 100 surrounding superconducting wires 10 is provided with an opening. In the case of the present embodiment, as shown in FIG. 7, the side wall portion 24 is formed with an opening portion 24H that communicates with the holding space 21 . The sealing material 41 shown in FIG. 6 is also filled in the opening 24H shown in FIG. Therefore, each of the plurality of protective members 100 shown in FIG. 6 is connected via a sealing material 41 filled in the opening 24H (see FIG. 7). Thereby, even when some of the plurality of superconducting wires 10 are quenched as described above, it is possible to suppress deterioration in performance as a coil.

When a metal material is used as the sealing material 41 , it is preferable to use a low-melting-point metal having a lower melting point than the material forming the protective member 100 in consideration of the filling characteristics of the sealing material 41 . In general, high-temperature superconducting materials used for high-temperature superconducting tape wires deteriorate and lose their superconducting properties when heated to 200° C. or higher. Therefore, by using a low-melting-point metal whose melting point is less than 200° C. as the sealing material 41, deterioration of the superconducting tape wire 11 during the filling operation can be prevented. Examples of low-melting-point metals include U alloy 78 having a melting point of about 80° C., solder, and the like. When the low-melting-point metal as described above is used as the sealing material 41 , the generation of voids in the sealing material 41 can be suppressed and the strength of the protective member 100 can be improved.

It should be noted that the timing of sealing with the sealing material 41 is preferably after forming into a coil shape. This is because if the sealing material 41 is impregnated before forming into a coil shape, the formability of the protective member 100 is lowered.

<Modification 2>
FIG. 8 is a cross-sectional view showing a modification of the superconducting wire winding structure shown in FIG. The modification shown in FIG. 8 is different from the example shown in FIG. 6 in that the protective member 100 is laminated in multiple layers. In applications requiring a strong magnetic field, such as superconducting magnets for nuclear fusion reactors and high-energy particle accelerators, superconducting wires 10 are sometimes laminated in multiple layers as shown in FIG. When stacking a plurality of superconducting wires 10 , positional deviation of the stacked superconducting wires 10 is likely to occur. In the example shown in FIG. 8 , a plurality of protective members 100 are laminated in the thickness direction (Z direction) of the protective member 100 . Specifically, multiple layers (three layers in FIG. 8) of protection are provided so that the ceiling portion 22 (see FIG. 3) of the first protection member 100 and the bottom portion 23 (see FIG. 3) of the second protection member 100 are in contact with each other. Members 100 are stacked. In the case of the present embodiment, protective member 100 has a structure capable of suppressing positional displacement in the Y direction, so positional displacement of a plurality of superconducting wires 10 held by the protective member can be suppressed.

As shown in FIGS. 2 and 3, the ceiling portion 22 (see FIG. 3) is formed such that the upper surface of the ceiling portion 22 has a groove shape (the groove portion 27 shown in FIG. 3) extending in the X direction (see FIG. 2). It is equipped with a stopper 26 that is attached. The bottom portion 23 (see FIG. 3) is shaped to be accommodated in the grooves between the stoppers 26 of the ceiling portion 22 when a plurality of blocks 20 are stacked. In the example shown in FIG. 3, both side surfaces of the bottom portion 23 are tapered. In other words, the bottom portion 23 has a trapezoidal portion on the bottom side in a cross-sectional view along the YZ plane shown in FIG. When stacking a plurality of blocks 20 , the trapezoidal portion of the bottom portion 23 is accommodated in the groove portion 27 of the ceiling portion 22 .

Although illustration is omitted, there is a case where the holding space 21 (see FIG. 3) is not impregnated with the sealing material 41 as a modification to FIG. However, when stacking the protection member 100 in the Z direction, an external force may be applied in the Z direction. Therefore, from the viewpoint of improving the strength against external force applied in the Z direction, each of the plurality of protective members 100 is preferably sealed with a sealing material 41 as shown in FIG.

<Modification 3>
FIG. 9 is an explanatory diagram showing a modification of the superconducting wire shown in FIG. FIG. 10 is an explanatory diagram showing a state in which the superconducting wire shown in FIG. 9 is held by the protective member according to the present embodiment. 11 is a cross-sectional view taken along line CC shown in FIG. 10. FIG. 12 is an exploded assembly view of the protective member and superconducting wire shown in FIG. 11. FIG. 1 to 8, the superconducting wire 10 and its protective member 100 having a simplified structure have been described. In this modified example, an embodiment in which the size of the superconducting tape wire 11 is increased and the number of laminated layers is increased will be described. Superconducting wire 10A and protective member 101 (see FIG. 10) described below are different from superconducting wire 10 and protective member 100 shown in FIG. 2 in a plurality of points. Although not shown individually, some of the differences described below may be applied in combination with the structures of superconducting wire 10 and protective member 100 shown in FIG.

A superconducting wire 10A of this modified example differs from the superconducting wire 10 in that it is larger in size than the superconducting wire 10 shown in FIG. For example, in the example shown in FIG. 9, the thickness of the superconducting tape wire 11 is about 0.15 mm, and the width of the superconducting tape wire 11 is about 10 mm. Each of the plurality of superconducting tape wires 11 is laminated in such a manner that they are not adhered to each other and can be displaced from each other. This point is the same as the superconducting wire 10 shown in FIG. In the example shown in FIG. 9 , the layered body of superconducting tape wires 11 is a layered body of 103 superconducting tape wires 11 . Moreover, in the example shown in FIG. 9, the thickness of the metal band 12 is, for example, about 1 mm. The outer diameter of the tube constituted by the metal band 12 is, for example, 20 mm, and the inner diameter is, for example, 19 mm.

Thus, the outer shape (wire diameter) of the tube made of metal strip 12 of superconducting wire 10A is thicker than the outer shape (wire diameter) of the tube made of metal strip 12 of superconducting wire 10 shown in FIG. In this way, when the superconducting wire 10 is enlarged, it is preferable to have a mechanism for cooling the superconducting tape wire 11 near the laminate. Therefore, in the case of this modification, superconducting wire 10A differs from superconducting wire 10 shown in FIG.

The cooling pipe 50 is a pipe serving as a coolant flow path, and is arranged along the laminate of the plurality of superconducting tape wires 11 . Liquid hydrogen or gaseous helium at a temperature of about 20 K (Kelvin), for example, flows through the cooling pipe 50 as a coolant. The cooling pipe 50 has an outer diameter of, for example, 8 mm and an inner diameter of, for example, 7 mm. That is, the thickness of the cooling pipe 50 is 1 mm. With this thickness, even if the cooling pipe 50 is made of metal, it can be deformed following the shape of the superconducting wire 10 . From the viewpoint of improving the flexibility of the cooling pipe 50, a corrugated pipe may be used. By disposing the cooling pipe 50 next to the stack of the superconducting tape wires 11 as in this modification, the cooling efficiency of the superconducting tape wires 11 can be improved.

Also, superconducting wire 10A differs from superconducting wire 10 shown in FIG. Wires 34 and wires 35 are also arranged along the stack of superconducting tape wires 11 . The wire diameters of the wires 34 and 35 are, for example, about 3 mm. By providing the wires 34 and 35, excessive deformation of the stack of superconducting tape wires 11 and the cooling pipe 50 can be suppressed. Moreover, each of the wires 34 and 35, like the three wires 30 described with reference to FIGS. It functions as a reinforcing member for suppressing damage to the superconducting wire 10A due to the pulling force when it is wound around the material.

Each of the stack of superconducting tape wires 11, the wires 34, the wires 35, and the cooling pipes 50 is inserted into the metal strip 12 molded into a tubular shape. As shown in FIG. 11, since the cooling pipe 50 and two wires (the wire 34 and the wire 35) are arranged in the tube, the shape of the laminate of the plurality of superconducting tape wires 11 is one side of the laminate. has a cross-sectional shape along the inner wall of the tube. As described above, each of the plurality of superconducting tape wires 11 is not adhered to each other and is laminated in such a manner that it can be displaced from each other. It is possible to transform.

Next, the protective member 101 of this modification shown in FIGS. 10 and 11 differs from the protective member 100 shown in FIGS. 2 and 3 in the following points. In the description of the protective member 101, redundant description of portions having the same structure as the protective member 100 shown in FIGS. 2 and 3 will be omitted.

First, in the case of this modification, the wire diameter of the superconducting wire 10A is large as described above, so the width of the protective member 101 needs to be increased. For example, in the example shown in FIG. 10, the width 20W of the block 20 in the Y direction is 25 mm. Moreover, the length 20L of the block 20 in the X direction is, for example, 30 mm. The value of length 20L has a greater effect on the ease of winding work than the value of width 20W. Therefore, even in the case of the protective member 101 having a large size, the X-direction length 20L of each of the plurality of blocks 20 is preferably 50 mm or less, particularly preferably 30 mm or less.

Further, as shown in FIG. 12, the protection member 101 is It differs from the protective member 100 shown in FIG. The bottom portion 23 of the protective member 101 is formed with a ball housing portion 23H capable of holding the ball bearing 60 in a rotatable state. On the other hand, a guide groove 28 is formed in the ceiling portion 21 when a plurality of blocks 20 are stacked (for example, see FIG. 14 described later). The guide groove 28 extends in the X direction shown in FIG. 11 . When a plurality of blocks 20 shown in FIG. 12 are stacked, the portions of the ball bearings 60 exposed from the bottom portion 23 of the ball bearings 60 are accommodated in the guide grooves 28 . In other words, the guide groove 28 is a groove capable of guiding the position of the ball bearing 60 of the upper block 20 when a plurality of blocks 20 shown in FIG. 12 are stacked.

By providing the guide grooves 28 and the ball bearings 60 in this way, it is possible to improve the work efficiency in the work of stacking a plurality of blocks 20 and winding them around the core material 40 .

In the case of this modification, since the ball bearing 60 is provided, the bottom portion 23 has a structure that can be disassembled. That is, the bottom portion 23 has a member 101A having a ball housing portion 23H in which the ball bearing 60 is housed, and a member 101B formed separably from the member 101A and arranged on the member 101A. . As shown in FIG. 12, the member 101A is a component that includes a portion forming the bottom portion 23 (see FIG. 11) and a portion forming the side wall portion 24 (see FIG. 11). In the cross-sectional view shown in FIG. 12, the member 101A is an L-shaped part. Member 101B has an upper surface facing superconducting wire 10A and a lower surface located on the opposite side of the upper surface and facing member 101A. The member 101A and the member 101B are not particularly required to be fixed by adhesion, and the member 101B is arranged on the member 101A. The ball accommodating portion 23H of the member 101A is covered with the member 101B. In other words, the member 101B functions as a cover member that covers the ball accommodating portion 23H.

In the process of assembling the protective member 101, first, the ball bearing 60 is inserted into the ball accommodating portion 23H of the member 101A, and then the member 101B is arranged so as to cover the upper surface of the member 101A including the ball accommodating portion 23H. Thereby, the ball bearing 60 is housed in the ball housing portion 23H in a rotatable state.

Further, as shown in FIG. 12, each of the plurality of blocks 20 included in the protection member 101 of this modified example includes a plurality of mutually separable members. Specifically, the plurality of members constitutes a member 101A that constitutes part of the bottom portion 23 (see FIG. 11) and the side wall portion 24 (see FIG. 11), a member 101B arranged on the member 101A, and the ceiling portion 22. A member 101C and a wire 36 are included.

Thus, when the member 101A, the member 101B, and the member 101C are formed separably, the operation of inserting the superconducting wire 10A is simple. In particular, superconducting wire 10</b>A of this modified example includes cooling pipe 50 and two wires 30 in addition to a laminate of a plurality of superconducting tape wires 11 . In this way, when protecting superconducting wire 10A having a complicated structure, it is particularly preferable that members 101A, 101B, and 101C around holding space 21 (see FIG. 11) are formed separably. .

FIG. 13 is a cross-sectional view showing a state in which the ceiling member and the side wall member shown in FIG. 11 are fixed via wires. In the case of this modification, since members 101A, 101B, and 101C are separably formed, after superconducting wire 10A is held in holding space 21 (see FIG. 11), members 101A and 101B are separated. , and member 101C. First, the member 101B is configured to engage with and be fixed to the member 101A by being placed on the member 101A. A portion corresponding to the side wall portion of the member 101A and the member 101C are fixed via a wire 36. As shown in FIG.

Specifically, as shown in FIG. 13, the member 101A is inserted into the groove 36T of the member 101C, and has a protruding portion CP1 protruding in the extending direction (Z direction in FIG. 11) of the side wall portion 24 (see FIG. 11). have. The member 101C has a protrusion CP2 formed in the groove 36T and protruding toward the wire 36. As shown in FIG. The wire 36 is inserted into the groove 36T and has a bent portion 36B sandwiched between the projecting portion CP2 and the projecting portion CP1.

As schematically shown with arrows in FIG. 13, when a force F1 is applied to pull the wire 36 in the X direction, a force F2 is generated so as to linearly extend the bent portion 36B. The protruding portion CP2 of the member 101C is pushed into the bent portion 36B of the wire 36 by this force F2. The projecting portion CP1 of the member 101A is sandwiched between the member 101C and the bent portion 36B of the wire 36. As shown in FIG. Therefore, when the force F2 is applied to the projecting portion CP2 of the member 101C, the projecting portion CP1 of the member 101A is pushed toward the wire 36 by the force F2 by the member 101C. As a result, the projecting portion CP1 is sandwiched between the member 101C and the bent portion 36B of the wire 36 and fixed.

As described above, the structure in which the members 101A and 101C are fixed by the force F1 that pulls the wire 36 in the X direction is particularly advantageous when the superconducting wire 10A (see FIG. 10) and the protective member 101 are wound around something. is. For example, as exemplified in FIG. 14 to be described later, if the wire 36 is pulled in the operation of winding it around the core material 40, the member 101C and the member 101A are automatically fixed by the pulling force for winding. .

Next, an example in which the modified superconducting wire 10A shown in FIGS. 9 to 12 is applied to a superconducting coil will be described. 14 is an enlarged cross-sectional view showing an example of a state in which the superconducting wire and protective member shown in FIG. 11 are wound around the core material of the coil. The cross section shown in FIG. 14 corresponds to the cross section shown in FIG. Although illustration is omitted, as a modification to FIG. 14, a plurality of superconducting wires 10A may be wound in one layer without being laminated, as in the examples shown in FIGS. However, when a large-sized superconducting wire 10A is applied as in this modified example, it is often used in a layered manner as shown in FIG.

As shown in FIG. 14, when superconducting wire 10A is used as an electric wire for a coil, superconducting wire 10A protected by protective member 101 is wound around core 40 to form a coil shape. The core material 40 is similar to the core material already described.

As in the case of the protective member 100 described above, in the case of this modification, the upper surface of the ceiling portion 22 of the protective member 101 is formed into a groove shape (a groove portion 27 shown in FIG. 12) extending in the X direction (see FIG. 10). It has a formed stop 26 . The bottom portion 23 (see FIG. 12) is shaped to be accommodated in the grooves between the stoppers 26 of the ceiling portion 22 when a plurality of blocks 20 are stacked. In the example shown in FIG. 12, both side surfaces of the bottom portion 23 are tapered. In other words, the bottom portion 23 has a trapezoidal portion on the bottom side in a cross-sectional view along the YZ plane shown in FIG. When stacking a plurality of blocks 20 , the trapezoidal portion of the bottom portion 23 is accommodated in the groove portion 27 of the ceiling portion 22 . Therefore, it is possible to suppress positional deviation in the Y direction in the winding operation for stacking a plurality of superconducting wires 10A. Since protective member 101 is provided with ball bearing 60 (see FIG. 11) and guide groove 28 (see FIG. 11) that are rotatably held, it is possible to easily carry out the winding operation for laminating a plurality of superconducting wires 10A. It is possible.

Also, as described with reference to FIG. 5, when a large current is simultaneously applied to each of the plurality of superconducting wires 10 arranged adjacent to each other, a strong electromagnetic force is generated in the Y direction shown in FIG. Also, as shown in FIG. 14, when a plurality of superconducting wires 10A are laminated and arranged in a plurality of rows, the arrangement center C1 (in the example shown in FIG. 14, the second row and the third row from the left) A stronger electromagnetic force is applied between rows and closer to the position of the second stage from the bottom.

When each of the plurality of superconducting wires 10A includes a cooling pipe 50 as in this modification, each of the plurality of superconducting wires 10A includes a plurality of superconducting wires 10A at a position close to the center C1 of the arrangement of the plurality of superconducting wires 10A. It is preferable to arrange so that the laminate of the tape wire 11 is positioned. Thereby, since cooling pipe 50 is arranged far from center C1 of the arrangement of superconducting wire 10, it is possible to suppress damage to cooling pipe 50 due to strong electromagnetic force. The protection member 101 shown in FIG. 11 is provided with an opening 25 on the opposite side of the side wall 24 via the holding space 21, as in the case of the protection member 100 shown in FIG. 11, the protective member 101 has an arched shape including a ceiling portion 22, a bottom portion 23, and side wall portions 24. As shown in FIG. An electromagnetic force generated by a large current flowing through the laminate of superconducting tape wires 11 is transmitted to the adjacent protective member 101 via the metal band 12 and the sealing member 41, and the protective member having an arch-shaped cross section It is difficult for the force transmitted from the adjacent protective member 101 to be applied to the cooling pipe 50 arranged in the holding space 21 (see FIG. 11) of 101 . Thus, in the case of this modification, by devising the layout of the cooling pipe 50, the application of electromagnetic force to the cooling pipe 50 itself is suppressed, and by devising the structure of the protective member 101, the cooling pipe 50 It suppresses the application of an external force to the As a result, damage to the cooling pipes 50 arranged in the superconducting wire 10A can be suppressed.

Moreover, in the example shown in FIG. 14, as in the example described with reference to FIGS. 11) is sealed. The description of the sealing material 41 is the same as the example already given with reference to FIGS. 6 and 8, so redundant description will be omitted.

In order to electrically connect a plurality of superconducting wires 10 via sealing material 41 , it is preferable that a part of protective member 101 surrounding superconducting wires 10 is provided with an opening. In the case of this modified example, as described with reference to FIG. In addition, in the case of this modified example, as shown in FIG. Each of the plurality of protective members 101 is connected via a sealing material 41 filled in the opening 24H (see FIG. 7) and the opening 22H. Thereby, even when some of the plurality of superconducting wires 10A are quenched as described above, it is possible to suppress deterioration in performance as a coil.

The present invention is not limited to the above embodiments and examples, and can be modified in various ways without departing from the scope of the invention. For example, as described above, a member for protecting a superconducting wire has been specifically described as an example of a linear material protection member. can be done. For example, it can be used as a protective member for protecting pipes as flow paths for liquids or gases, or electric wires.

Further, for example, although specific dimensions of each component of the superconducting wire 10, the protective member 100, the superconducting wire 10A, and the protective member 101 have been described as examples, each numerical value is within the scope of the above description. can be changed with Moreover, in FIGS. 3 and 11, the example in which the three wires 30 are provided as reinforcing members has been described. However, the number of wires 30 is not limited to three, and may be two or less (however, at least one is required) or four or more.

Further, for example, various modifications have been described above, but a part of the embodiment can be applied in combination with another embodiment.

INDUSTRIAL APPLICABILITY The present invention can be used as protective members for linear materials used in various devices such as nuclear fusion reactors, plasma generators, accelerators, superconducting power transmission, power storage, superconducting motors, and liquid transport piping.

10, 10A Superconducting wire 11 Superconducting tape wire 12 Metal strip 20 Block 20W Width 21 Holding space 22 Ceiling parts 22H, 24H Opening part 23 Bottom part 23H Ball accommodating part 24 Side wall part 25 Opening part 26 Stopper 27 Groove part 28 Guide grooves 30, 31, 32, 33, 34, 35, 36 Wires 31T, 32T, 33T, 36T Groove 36B Bending portion 40 Core material 41 Sealing material 50 Cooling pipe 60 Ball bearings 100, 101 Protective members 101A, 101B, 101C Members CP1, CP2 Protruding portions F1, F2 force

Claims (8)

a plurality of blocks for circumferentially holding the linear material;
a first wire engaged with the plurality of blocks;
A linear material protection member having
The linear material is a superconducting wire including a plurality of laminated superconducting tape wires,
each of the plurality of blocks,
a holding space for holding the linear material;
a ceiling covering the holding space;
a bottom located on the opposite side of the ceiling via the holding space;
a side wall portion continuous with each of the ceiling portion and the bottom portion;
including
A first groove extending in a first direction and capable of engaging the first wire is formed in any one of the ceiling portion, the bottom portion, and the side wall portion,
the plurality of blocks are connected to each other via a first wire engaged in the first groove;
A first opening communicating with the holding space is formed on the opposite side of the side wall through the holding space,
The linear material protection member, wherein the first opening is formed so as to extend across the plurality of blocks along the first direction when the plurality of blocks are connected. In claim 1 ,
The linear material protection member has the first wire, a second wire engaged with the plurality of blocks, and a third wire engaged with the plurality of blocks,
A linear material protection member, wherein each of said first wire, said second wire and said third wire is engaged with said plurality of blocks along said linear material. In claim 1 ,
The ceiling portion has a stopper formed so that the upper surface of the ceiling portion has a groove shape extending in the first direction,
The linear material protection member, wherein the bottom portion is shaped to be accommodated in the groove between the stoppers of the ceiling portion when the plurality of blocks are stacked. In claim 3 ,
A plurality of said linear material protection members are laminated in the thickness direction of said linear material protection member,
A linear material protection member, wherein the laminate of the plurality of superconducting tape wires is sealed with a sealing material impregnated in the holding space. In claim 3 ,
The linear material protection member further has a ball bearing exposed from the bottom,
The linear material protection member, wherein the ceiling portion is formed with a guide groove capable of guiding an exposed portion of the ball bearing from the bottom portion when the plurality of blocks are stacked. In claim 5 ,
the bottom portion includes a first member having a ball housing portion in which the ball bearing is housed;
a second member formed separably from the first member and arranged on the first member;
has
A linear material protection member, wherein the ball receiving portion of the first member is covered by the second member. In claim 1 ,
The linear material is
the plurality of laminated superconducting tape wires;
a cooling pipe arranged next to the laminate of the plurality of superconducting tape wires;
A linear material protection member, which is a superconducting wire including a laminate of the plurality of superconducting tape wires and a metal band wound so as to bundle the cooling pipes. In claim 7 ,
Each of the plurality of blocks of linear material protection members:
comprising a plurality of members separable from each other,
The plurality of members are
a first member forming part of the bottom portion and the sidewall portion;
a second member disposed on the first member;
a third member that constitutes the ceiling;
the first wire;
including
The first member is inserted into the first groove of the third member and has a first protrusion that protrudes in the extending direction of the side wall,
The third member has a second protrusion formed in the first groove and protruding toward the first wire,
the first wire is inserted into the first groove and has a bent portion sandwiched between the second projecting portion and the first projecting portion;
A linear material protection member, wherein the first member and the third member are fixed by pulling the first wire in the first direction.

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