JP5752393B2 - Superconducting magnet device - Google Patents

Description

  The present invention relates to a superconducting magnet device to which a superconducting coil is applied, and more particularly to a superconducting magnet device capable of reducing the weight while maintaining the strength of a container or the like constituting the superconducting magnet.

  The superconducting magnet device includes a magnet to which a superconducting coil is applied and a refrigerator that cools the magnet, and is used in a state in which the superconducting coil is cooled.

  For this reason, it is necessary to suppress the intrusion heat into the superconducting coil to be low, and the support material that supports the superconducting coil is arranged in a direction in which it is pulled against the load.

  As a result, the superconducting magnet device support structure generally uses various regions of the container constituting the superconducting magnet device (see Patent Documents 1-3 and the like).

  For example, Patent Document 1 discloses a configuration in which a superconducting coil is pressure-fixed by a screw-shaped pressing member from a direction orthogonal to its axis.

  Patent Document 2 discloses a configuration in which a superconducting magnet is fixedly supported by applying a fastening load from both sides in the coil center line direction by a load support.

  Patent Document 3 discloses a technique in which a superconducting coil and shield member moving means for suppressing relative vibration generated between the inner container and the shield member are provided.

Japanese Patent Laid-Open No. 2004-47712 JP 2009-130081 A JP 05-135942 A

  A large amount of metal material is generally used in the superconducting magnet device. For example, in a superconducting magnet device for pulling up a single crystal, the weight of one unit reaches several tons. When the weight is large as described above, there are cases where restrictions are imposed on the installation location of the superconducting magnet device and excessive earthquake resistance may be required.

  The reason why the weight of the superconducting magnet device is increased in this way is that force acts on various regions of the container constituting the superconducting magnet device, and thus it is necessary to reinforce or increase the thickness of these forces. .

  For example, when trying to reduce the weight by simply thinning the container that constitutes the superconducting magnet device, large deformation or destruction of the container may occur due to electromagnetic force or mass, reducing the weight while maintaining the strength. The problem that cannot be done.

  The present invention has been made based on such circumstances, and by applying a support structure that limits a member to which a load such as electromagnetic force or mass acts, a superconducting magnet device is achieved by minimizing a portion that needs reinforcement. It aims at weight reduction, maintaining the intensity | strength of.

The present invention relates to a superconducting magnet device that cools a superconducting coil with a refrigerant, a torus-like refrigerant that stores the refrigerant and stores and supports the superconducting coil, and has a central hole that penetrates the central hole of the superconducting coil. A container, a torus-shaped vacuum container having a central hole portion that houses the refrigerant container and further penetrates the central hole portion of the refrigerant container , and the central hole portion of the vacuum container and the central hole portion of the refrigerant container A superconducting magnet device provided between the vacuum vessel and the refrigerant vessel, and having a central hole portion of the vacuum vessel supported on an installation base by a vacuum vessel leg. provide.

Further, the present invention provides a superconducting magnet device that cools a superconducting coil by thermally connecting it to a refrigerator, and a coil base that supports the superconducting coil and has an inner peripheral wall that penetrates the central hole of the superconducting coil; A torus-like vacuum vessel having a central hole portion that further penetrates the inner peripheral wall of the coil base, and the vacuum vessel and the coil disposed between the central hole portion of the vacuum vessel and the inner peripheral wall of the coil base. There is provided a superconducting magnet device comprising a heat insulating support for connecting to a base, wherein a central hole portion of the vacuum vessel is supported on an installation base by a vacuum vessel leg.

  In the present invention, the superconducting coil is supported by transmitting the force generated in the superconducting coil from the legs supporting the superconducting coil directly to the installation base such as the ground instead of the end plate and the outer cylinder of the vacuum vessel. It is.

  That is, the force generated in the superconducting coil is transmitted from the vacuum vessel leg to the ground through the heat insulating support and the vacuum vessel center hole so that the force is not applied to the end plate and the outer cylinder of the vacuum vessel. Thereby, a superconducting coil is hold | maintained, without requiring a vacuum vessel end plate etc.

  Therefore, since the force from the superconducting coil is not applied to the vacuum container, the thickness of the container or the like can be suppressed to the minimum, and the weight can be reduced.

  In addition, the electromagnetic force and mass are supported only by the refrigerant container center hole, the heat insulating support, the vacuum container center hole, and the vacuum container legs, so that it is not necessary to make the other members of the vacuum container and the refrigerant container thick. The reinforcement can be minimized, and the weight can be reduced while maintaining the strength.

1 is a longitudinal sectional view showing the overall configuration of a superconducting magnet device according to a first embodiment of the present invention. AA sectional view taken on the line AA of FIG. The rear view of FIG. The longitudinal cross-sectional view which shows the structure of the superconducting magnet apparatus by 2nd Embodiment of this invention. BB sectional drawing of FIG. The longitudinal cross-sectional view which shows the structure of the superconducting magnet apparatus by 3rd Embodiment of this invention. The CC sectional view taken on the line of FIG. The longitudinal cross-sectional view which shows the structure of the superconducting magnet apparatus by 4th Embodiment of this invention. The DD sectional view taken on the line of FIG. The longitudinal cross-sectional view which shows the structure of the superconducting magnet apparatus by 5th Embodiment of this invention. EE sectional view taken on the line of FIG.

  Hereinafter, embodiments of a superconducting magnet device according to the present invention will be described with reference to the drawings.

First Embodiment (FIGS. 1-3)
FIG. 1 is a longitudinal sectional view showing an overall configuration of a superconducting magnet apparatus 1A according to a first embodiment of the present invention, and FIG. 2 is a sectional view taken along line AA of FIG. 3 is a rear view of the superconducting magnet device 1A shown in FIG.

  In the present embodiment, a superconducting magnet device having a configuration in which a heat insulating support having a truss structure is applied and the superconducting coil is cooled by a refrigerant will be described as an example.

  As shown in FIGS. 1 to 3, the superconducting magnet device 1 </ b> A according to the present embodiment includes a superconducting coil 1 as a main constituent member, a refrigerant container 2 that accommodates the superconducting coil 1, and an outer periphery provided inside the refrigerant container 2. A vacuum vessel 3 for holding a vacuum, a vacuum vessel leg 3b for supporting the vacuum vessel 3, and a heat insulating support 4 are provided. These members are fixedly installed in a vertical arrangement on, for example, a horizontal installation (support) base shown below or the ground G.

In the superconducting magnet device 1A of the present embodiment, the superconducting coil 1 has an annular configuration arranged around the horizontal axis, and the outer peripheral side of the superconducting coil 1 has a large-diameter annular or torus-like refrigerant. The container 2 is housed in a state of being covered.

  The heat insulating support 4 is a heat insulating support assembly having a truss structure in which a plurality of rod-shaped support elements 4a are assembled in the vertical, horizontal, and diagonal directions and combined in a triangular shape by the joining members 4b. The heat insulating support 4 is provided between the concentric center hole portions 2 a and 3 a of the refrigerant container 2 and the vacuum container 3. The heat insulating support 4 is provided via a plurality of seats (brackets) 2c and 3c respectively attached to the concentric refrigerant container central hole 2a and the vacuum container central hole 3a over the entire circumference. Connected to the inner surface. As shown in FIG. 1, the heat insulating support 4 may have various truss structures other than the truss structure assembled by rotating the support element of the outer square shape by 45 ° on the support element 4a of the inner square shape, for example.

  And the peripheral wall (projection extension part) of the vacuum vessel center hole 3a is directly connected to the vacuum vessel leg 3b, and is erected and supported on the installation (support) base G. That is, the peripheral wall of the vacuum vessel center hole portion 3a is fixedly arranged on the installation base G by fixing or connecting the outer peripheral surface portion of the vacuum vessel 3 to the vacuum vessel leg 3b, and the refrigerant 5 is stored in the refrigerant vessel 2. By superposing the liquid, the superconducting coil 1 is cooled.

  With this configuration, for example, when applied to pulling a single crystal of metal, the electromagnetic force and mass applied to the superconducting coil 1 are insulated in the truss structure extending in the circumferential direction over the refrigerant container 2 and the entire circumference. 4. Via the vacuum vessel center hole 3a, the vacuum vessel leg 3b is transmitted to the installation base G, for example, the ground.

  According to the present embodiment, the force generated in the superconducting coil 1 is transmitted from the vacuum vessel leg 3b to the installation base G such as the ground through the refrigerant vessel central hole 2a, the heat insulating support 4, and the vacuum vessel central hole 3a. Therefore, since the force generated in the superconducting coil 1 is not applied to the end plate and the outer cylinder of the vacuum vessel 3, the superconducting coil 1 is stably fixed and held without the vacuum vessel end plate or the like.

  With this configuration, since the force from the superconducting coil 1 is not applied to the end plate or the outer cylinder of the vacuum vessel, the thickness of the refrigerant vessel 2 or the vacuum vessel 3 can be minimized, while maintaining the strength, Weight reduction can be achieved.

  That is, the electromagnetic force and mass of the superconducting coil 1 can be supported only by the refrigerant container central hole 2a, the heat insulating support 4, the vacuum container central hole 3a, and the vacuum container leg 3b. It is not necessary to make the other members of the wall 2 thicker, the reinforcement can be minimized, and the weight can be reduced while maintaining the strength.

Second Embodiment (FIGS. 4 and 5)
FIG. 4 is a longitudinal sectional view showing the configuration of the superconducting magnet device 1B according to the second embodiment, and FIG. 5 is a sectional view taken along line BB in FIG.

  In the present embodiment, a superconducting magnet apparatus 1B having a configuration in which the heat insulating support 4 having a truss structure is applied and the superconducting coil 1 is cooled by the refrigerant 5 will be described. In addition, about the structure similar to 1st Embodiment, the same code | symbol as FIG. 1 is attached | subjected to FIG. 4 and FIG. 5, and description is abbreviate | omitted.

  As shown in FIG. 4, the basic configuration of the superconducting magnet device 1B according to the present embodiment is substantially the same as that of the first embodiment. In this embodiment, in addition to the structure of 1st Embodiment, it has the radiation shield 6 and the refrigerator 7, and this radiation shield 6 is thermally connected with the refrigerator 7, and becomes a structure maintained at low temperature. .

  For example, as shown in FIGS. 4 and 5, the superconducting magnet device 1 </ b> B includes a heat-insulating support 4 having a truss structure and a radiation shield 6, and the superconducting coil 1 is cooled by the refrigerant 5 in the refrigerant container 2. The refrigerator 7 has a plurality of stages of cooling units (not shown) inside the vacuum vessel 3.

  In this configuration, the electromagnetic force and mass applied to the superconducting coil 1 are transmitted to the refrigerant container central hole 2a, the heat insulating support 4, the vacuum container central hole 3a, and the vacuum container leg 3b. Further, intrusion heat due to radiation from the vacuum vessel 3 is once removed to the refrigerator 7 through the radiation shield 6, and radiant heat entering the superconducting coil 1 is only from the radiation shield 6.

According to the present embodiment, the electromagnetic force and mass of the superconducting coil 1 are supported only by the refrigerant container central hole 2a, the heat insulating support 4 , the vacuum container central hole 3a, and the vacuum container leg 3b, so that the vacuum container 3 and It is not necessary to make the other members of the refrigerant container 2 thick, reinforcing can be minimized, and weight can be reduced while maintaining strength.

  Further, since the heat entering the superconducting coil 1 can be reduced by the radiation shield 6, there is a surplus capacity for receiving the heat entering due to conduction from the heat insulating support 4, the heat insulating support 4 can be shortened, and light weight is maintained while maintaining the strength. Can be

[Third Embodiment] (FIGS. 6 and 7)
FIG. 6 is a longitudinal sectional view showing the configuration of the superconducting magnet device 1C according to the third embodiment, and FIG. 7 is a sectional view taken along the line CC of FIG.

The superconducting magnet device 1C of the present embodiment is similar to the above embodiment in the superconducting coil 1, the coil base 9, the vacuum vessel 3, the heat insulating support 4, and the refrigerator 7 that support the superconducting coil 1 and have an inner peripheral wall. The heat transfer plate 8 is provided.

  The superconducting coil 1 is fixed to the coil base 9 and is cooled by being thermally connected through the refrigerator 7 and the heat transfer plate 8. The heat insulating support 4 is connected to a coil base 9 and a seat 3c attached to the vacuum vessel center hole 3a.

  In this configuration, the electromagnetic force and mass applied to the superconducting coil 1 are transmitted to the coil base 9, the heat insulating support 4, the vacuum vessel center hole 3a, and the vacuum vessel leg 3b.

Also in this embodiment, the electromagnetic force and mass applied to the superconducting coil 1 are supported only by the coil base 9, the heat insulating support, the vacuum vessel center hole portion 3 a and the vacuum vessel leg portion 3 b, so that the vacuum vessel 3 and the coil stand 9 It is not necessary to increase the thickness of the other members, the reinforcement can be minimized, and the weight can be reduced while maintaining the strength.

[Fourth Embodiment] (FIGS. 8 and 9)
FIG. 8 is a longitudinal sectional view showing the configuration of the superconducting magnet device 1D according to the fourth embodiment, and FIG. 9 is a sectional view taken along the line DD of FIG.

  The superconducting magnet device 1D of the present embodiment is substantially the same as the first embodiment in the basic configuration, but includes the radiation shield 6 and the refrigerator 7 in addition to the configuration of the first embodiment. It is configured to be thermally connected to the refrigerator 7 and maintained at a low temperature.

In this superconducting magnet device 1D, the electromagnetic force and mass applied to the superconducting coil 1 are sequentially transmitted to the coil base 9, the heat insulating support 4, the vacuum vessel center hole portion 3a, and the vacuum vessel leg 3b having the inner peripheral wall . Further, the intrusion heat due to the radiation from the vacuum vessel 3 is once removed to the refrigerator 7 through the radiation shield 6, and the radiant heat entering the superconducting coil 1 is only from the radiation shield 6.

According to the present embodiment, the electromagnetic force and mass are supported by the electromagnetic force and mass applied to the superconducting coil 1 only by the coil base 9, the heat insulating support 4, the vacuum vessel center hole portion 3a, and the vacuum vessel leg 3b. Reinforcement can be kept to a minimum without having to make the container 3 and other members of the coil base 9 thick, and the weight can be reduced while maintaining the strength.

  In addition, since the radiation heat into the superconducting coil 1 can be reduced by the radiation shield 6, there is a surplus in intrusion heat due to conduction from the heat insulating support 4, the heat insulating support 4 can be shortened, and the weight is reduced while maintaining the strength. be able to.

[Fifth Embodiment] (FIGS. 10 and 11)
FIG. 10 is a longitudinal sectional view showing the configuration of the superconducting magnet device 1E according to the fifth embodiment, and FIG. 11 is a sectional view taken along the line EE of FIG.

  In the superconducting magnet apparatus 1E according to the present embodiment, as shown in FIG. 11, the heat insulating support 4 is arranged along the coil axial direction of the superconducting coil 1 (longitudinal direction of the heat insulating support 4). It is arranged substantially parallel to the direction of the electromagnetic force acting between them.

  The electromagnetic force and mass applied to the superconducting coil 1 are transmitted from the refrigerant container central hole 2a to the heat insulating support 4, the vacuum container central hole 3a, and the vacuum container leg 3b. Further, intrusion heat due to radiation from the vacuum vessel 3 is once removed to the refrigerator (not shown) through the radiation shield 6, and radiant heat entering the superconducting coil 1 is only from the radiation shield 6.

  Further, intrusion heat due to conduction from the vacuum vessel 3 is removed from the heat insulating support 4 through the radiation shield 6 by the refrigerator, and heat entering the superconducting coil 1 by conduction is only from the radiation shield 6.

By supporting the electromagnetic force and mass of the superconducting coil 1 only with the refrigerant container central hole 2a, the heat insulating support 4, the vacuum container central hole 3a and the vacuum container leg 3b, the vacuum container 3 and other members of the refrigerant container 2 are supported. Therefore, the reinforcement can be minimized and the weight can be reduced while maintaining the strength.

  Further, since the heat entering the superconducting coil 1 can be reduced by the radiation shield 6, there is a surplus in the heat entering due to conduction from the heat insulating support 4, and the heat insulating support 4 can be shortened, thereby maintaining the strength. However, the weight can be reduced.

[Other Embodiments]
In each of the above-described embodiments, it is possible to use a fiber reinforced resin having a thermal conductivity smaller than that of a general metal and a large tensile strength for the heat insulating support 4.

  That is, by using the fiber reinforced resin, the electromagnetic force and mass applied to the superconducting coil 1 are transmitted from the refrigerant container central hole 2a to the heat insulating support 4, the vacuum container central hole 3a, and the vacuum container leg 3b, thereby By supporting the electromagnetic force and mass of the coil 1 only by the refrigerant container central hole 2a, the vacuum container central hole 3a, and the vacuum container leg 3b, other members such as the vacuum container 3 and the refrigerant container 2 are thickened. There is no need to do so and the reinforcement can be minimized.

  Further, the heat insulating support 4 is made of a fiber reinforced resin having a lower thermal conductivity and a higher tensile strength than that of a general metal, thereby maintaining the strength of the superconducting magnet device as compared with a metal support structure. The weight can be reduced.

  Further, it is possible to use aluminum or aluminum alloy which is lighter than stainless steel which is generally used for the vacuum vessel 3. As a result, the electromagnetic force and mass of the superconducting coil 1 are supported only by the refrigerant container central hole 2a, the vacuum container central hole 3a, and the vacuum container leg 3b, so that other members of the vacuum container 3 and the refrigerant container 2 can be meated. There is no need to increase the thickness, and the reinforcement can be minimized.

  In addition, aluminum or aluminum alloy used in the vacuum vessel 3 is generally about one-third the weight of stainless steel used in the vacuum vessel 3, while maintaining the strength of the superconducting magnet device. The weight can be reduced.

  Thus, the electromagnetic force and mass of the superconducting coil 1 are supported only by the refrigerant container central hole 2a, the vacuum container central hole 3a, and the vacuum container leg 3b, so that the vacuum container 3 and other members of the refrigerant container 2 are supported. There is no need to increase the wall thickness, and reinforcement can be minimized.

  Moreover, the aluminum or aluminum alloy used for the refrigerant container 2 is generally about one-third the weight of stainless steel used for the refrigerant container 2, while maintaining the strength of the superconducting magnet device. The weight can be reduced.

  Examples of the aluminum alloy include an aluminum / silicon alloy (Al—Si) and other various alloys such as Na, K, Cu, Mg, Fe and the like.

  The vacuum vessel 3 includes a refrigerator having a plurality of stages of cooling units therein, and a radiation shield disposed inside the vacuum vessel so as to surround the superconducting coil and cooled by conduction by the refrigerator. It is good also as a structure.

1 Superconducting coils 1A, 1B, 1C, 1D, 1E Superconducting magnet device 2 Refrigerant container 2a Refrigerant container center hole 2c Seat (bracket)
3 Vacuum vessel 3a Vacuum vessel center hole 3b Vacuum vessel leg 3c Seat (bracket)
4 Insulation support 5 Refrigerant 6 Radiation shield 7 Refrigerator 8 Heat transfer plate 9 Coil base G Support base

Claims (11)

In a superconducting magnet device that cools a superconducting coil with a refrigerant,
A torus-shaped refrigerant container having a central hole portion that stores the refrigerant and stores and supports the superconducting coil and penetrates the central hole of the superconducting coil;
A torus-shaped vacuum container having a central hole portion that houses the refrigerant container and further penetrates the central hole portion of the refrigerant container ;
Provided between the central hole portion of the vacuum container and the central hole portion of the refrigerant container, and a heat insulating support for connecting the vacuum container and the refrigerant container,
A superconducting magnet device, wherein a central hole portion of the vacuum vessel is supported on an installation base by a vacuum vessel leg. A refrigerator having a cooling part inside the vacuum vessel;
The superconductivity according to claim 1, further comprising: a radiation shield provided inside the vacuum vessel and disposed so as to surround the refrigerant vessel, wherein the radiation shield is cooled by conduction by the refrigerator. Magnet device. In a superconducting magnet device that cools a superconducting coil by thermally connecting it to a refrigerator,
A coil base supporting the superconducting coil and having an inner peripheral wall penetrating the central hole of the superconducting coil;
A torus-shaped vacuum vessel having a central hole portion that further penetrates the inner peripheral wall of the coil base;
It is arranged between the central hole of this vacuum vessel and the inner peripheral wall of the coil stand, and comprises a heat insulating support that connects the vacuum vessel and the coil stand,
A superconducting magnet device, wherein a central hole portion of the vacuum vessel is supported on an installation base by a vacuum vessel leg. The vacuum vessel includes a refrigerator having a plurality of cooling units therein,
The superconducting magnet device according to claim 3, further comprising a radiation shield disposed inside the vacuum vessel so as to surround the superconducting coil and cooled by conduction by the refrigerator. The heat insulating support includes a plurality of support elements from a vacuum container at a high temperature end to a refrigerant container at a low temperature end, and at least one of the connection portions of the support elements is thermally connected to the radiation shield. The superconducting magnet device according to claim 2 , wherein the superconducting magnet device is connected by a joining member. The heat insulating support includes a plurality of support elements from a vacuum vessel at a high temperature end to a coil base at a low temperature end, and at least one of the connection portions of the support elements is thermally connected to the radiation shield. The superconducting magnet device according to claim 4 , wherein the superconducting magnet devices are connected by members. The superconducting magnet device according to any one of claims 1 to 6, wherein the heat insulating support has a truss structure in which a plurality of bar-shaped support elements are assembled in a vertical, horizontal, and diagonal direction. The heat insulating support is provided between a central hole portion of the vacuum container and a central hole portion of the refrigerant container, connects the vacuum container and the refrigerant container, and a plurality of longitudinal directions of the heat insulating support are provided. The superconducting magnet device according to any one of claims 1, 2, and 5, wherein the superconducting magnet device is disposed substantially parallel to a direction of electromagnetic force acting between the superconducting coils. The superconducting magnet device according to any one of claims 1 to 8, wherein the heat insulating support is made of a fiber reinforced resin. The superconducting magnet device according to any one of claims 1 to 9, wherein the vacuum vessel is made of aluminum or an alloy thereof. The superconducting magnet device according to any one of claims 1, 2, 5, 7, and 8, wherein the refrigerant container is made of aluminum or an alloy thereof.

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