JPS6349885B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a support structure for a large superconducting magnet.

The structure of a conventional large superconducting magnet was as shown in FIGS. 1 and 2. In the figure, reference numeral 1 denotes a superconducting magnet in which a superconducting cable 4 is wound into a cylindrical shape.
is fixed. The superconducting magnet 1 constructed in this way is housed in a container 2, is adiabatically supported by a weight support 3, and is cooled to an extremely low temperature.

Next, the operation of the conventional superconducting magnet configured as described above will be explained. In large superconducting magnets, a very large electromagnetic force acts as an expansion force in the coil radial direction and as a compression force in the axial direction, so simply winding the superconducting cable 4 into a cylindrical shape is not mechanically sufficient and may cause damage to the superconducting cable. engrave on. As shown in FIG. 1, if a slot is provided in the electromagnetic force support member 5 and the superconducting cable 4 is inserted into the slot and fixed with a wedge 6, the superconducting cable 4 can be prevented from being damaged by the electromagnetic force.

Conventional large superconducting magnets are constructed as described above, so in super-large superconducting magnets such as superconducting power storage magnets with a radius and height of about 100 m, one side of the electromagnetic force supporting material 5 is It is extremely difficult to assemble and maintain as it is 3m long.

In addition, the size of the electromagnetic force supporting material 5, that is, the distance between the superconducting cables 4, is determined by the electromagnetic requirements of the magnet rather than by the electromagnetic force resistance, and if the requirement is only to maintain the electromagnetic force, then 1st
In some cases, the electromagnetic force supporting member 5 does not have to be a solid block as shown in the figure.

Furthermore, if the superconducting magnet 1 is buried in the rock and its electromagnetic force is supported by the rock, the required amount of the electromagnetic force support material 5 can be further reduced, and in such a case, as shown in FIG. Using a solid block-shaped electromagnetic support member 5 as shown would be a very wasteful investment.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and by making the electromagnetic force support material into a frame structure, it can be easily assembled and maintained, and it also meets the requirements from the actual electromagnetic force. It is an object of the present invention to provide a superconducting magnet in which the optimal shape of a frame structure can be determined based on the strength of the superconducting magnet, and wasteful investment can be prevented.

An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 2 and 3, the superconducting magnet 1, container 2, weight support 3, and superconducting cable 4 are the same as conventional ones, and therefore their explanations will be omitted. 7 is an axial support 11 and a radial support 1
2 is a frame structure, 8 is a superconducting cable holder, 9 is a heat insulating support, and 10 is a rock.

In the superconducting magnet according to the embodiment of the present invention configured as described above, the electromagnetic force generated by the current flowing through the superconducting cable 4 is transmitted to the frame structure 7 by the superconducting cable holder 8, and the electromagnetic force is transmitted to the frame structure 7 in the axial direction. The compressive electromagnetic force is supported by the axial support 11. Further, the radial expansion force is transmitted to the radial support 12, and the insulating support 9 and the container 2
is transmitted to and supported by the rock mass 9 surrounding the outer surface of the container.

In the above embodiment, both supports constituting the frame structure 7 are provided at equal intervals, but the intervals may not be equal but may vary continuously. Further, the frame structure 7 does not have to be in a grid shape,
It may also be shelf-shaped as shown in FIG. Furthermore,
Although the above embodiment has been described with respect to a cylindrical magnet, it goes without saying that the present invention can also be applied to a case where the superconducting cable 4 is installed on a curve in the axial direction, as shown in FIG.

As described above, according to the present invention, since the electromagnetic force support structure is made into a frame structure, assembly and maintenance of the superconducting magnet can be easily performed, and furthermore, the electromagnetic force generated in the electromagnetic force support structure by electromagnetic force can be easily assembled and maintained. Since the shape of the frame structural material can be optimized according to stress, the amount of structural material used can be minimized.

[Brief explanation of the drawing]

FIG. 1 is a partially cross-sectional perspective view showing the structure of a conventional superconducting magnet, FIG. 2 is a perspective view showing details of the main parts of the superconducting magnet in FIG. 1, and FIG. 3 is a superconducting magnet according to an embodiment of the present invention. FIG. 4 is a perspective view showing the structure of the main part of the superconducting magnet in FIG. 3, and FIGS.
FIG. 3 is a cross-sectional view showing the configuration of other embodiments. In the figure, 1 is a superconducting magnet, 2 is a container, 4 is a superconducting cable, 7 is a frame structure, 11 is an axial support, and 12 is a radial support. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] 1. A superconducting magnet comprising a cylindrically wound superconducting cable and a frame structure for supporting and fixing the superconducting cable. 2. The frame structure is characterized by being composed of first supports disposed at predetermined intervals in the axial direction and second supports that fix the first supports in the axial direction. A superconducting magnet according to claim 1.