JPS6241353B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vacuum vessel support device for a torus-type nuclear fusion device, and more particularly to a support rod that supports the vacuum vessel's own weight.

In torus-type fusion devices, a vacuum vessel is used to maintain high-temperature plasma.
That is, as shown in FIGS. 1 and 2, the plasma 1 is confined inside the vacuum container 2. In order to generate and maintain the plasma 1, a toroidal magnetic field coil 5 and a poloidal magnetic field coil 6 are also provided.
are arranged around the vacuum vessel 2 in a mutually interlinked manner, and these are supported concentrically around the central support 9 between the upper pedestal 7 and the lower pedestal 8, and the vacuum vessel 2 is At the outer periphery, it is supported by support columns 10 installed on the lower pedestal 8 via support arms 11 that extend in the radial direction in the gaps between the toroidal magnetic field coils 5 .

As shown in FIG. 1, the vacuum container 2 is formed in an annular shape from a large number of fan-shaped thick ring parts 3 and a bellows part 4 interposed between them. In addition, as a high resistance part, an insulator part may be used instead of a bellows part to electrically insulate between each thick ring. Therefore, the thick ring portion 3 is affected not only by the vacuum force but also by the interaction between the current induced in the vacuum vessel 2 when the plasma 1 moves and disappears, and the magnetic fields of the toroidal magnetic field coil 5 and the poloidal magnetic field coil 6. Centripetal force due to electromagnetic force generated by this action will act.

Incidentally, conventionally, as shown in FIGS. 3 and 4, this centripetal force is supported by the support column 10 via the support arm 11, and the weight of the vacuum container 2 is transferred to the torus direction of the thick ring portion 3. Center position B
The toroidal magnetic field coils 5 are supported in the gap between them by support rods 12A and 12B extending in the vertical direction and arranged offset from the -B line.

However, since the vacuum vessel 2 is composed of a composite body of the thick ring part 3 and the bellows part 4 (or insulator part) as described above, the movement of plasma and
As shown in FIG. 4, the current induced in the vacuum vessel 2 at the time of extinction flows as an eddy current Ie in the thick ring portion 3, and the interaction between this eddy current Ie and the magnetic field of the toroidal magnetic field coil 5 A saddle-shaped current electromagnetic force is generated by
A downward (or upward) force acts on the side. As a result, a large torque is generated that tries to rotate the thick ring portion 3 about the center line B-B, and a large torque is generated upwardly on one support rod 12A and downwardly on the other support rod 12B. There was a risk that these support rods would be damaged by the forces acting on them.

An object of the present invention is to provide a vacuum vessel support device for a torus-type nuclear fusion device that can eliminate the drawbacks of the prior art described above, reduce the load applied to the vacuum vessel support rod, and support the vacuum vessel well. It is in.

In order to achieve this object, the present invention is characterized in that the support rod is arranged at the center of the thick ring part in the torus direction.

An embodiment of the present invention will be described below with reference to FIGS. 5 and 6. In these figures, the same reference numerals as in FIGS. 3 and 4 indicate the same or equivalent parts.

The difference between this embodiment and the conventional example described above is that the support rod 13 is located at the lower part of the thick ring part 3 and pinned at the radial center position on the center line B-B of the thick ring part 3 in the traverse direction. They are coupled together and further supported by the lower pedestal 8 via a horizontal beam 14 extending horizontally in the torus direction and beam supports 15 extending vertically at both ends of the horizontal beam 14.

When the support rod 13 is disposed on the center line B-B of the thick ring portion 3 in the traverse direction in this way, the thick ring portion 3 will be rotated by the saddle-shaped current electromagnetic force on this center line B-B. Since the torque is zero, no load is applied to the support rod 13 due to the saddle-shaped current electromagnetic force, and only the weight of the vacuum vessel 2 is applied. Further, since the support rod 13 is pin-coupled to the thick ring portion 3, no moment is generated and the vacuum container 2 can be supported well.

As explained above, according to the present invention, it is possible to reduce the load applied to the vacuum container support rod, prevent damage thereto, and support the vacuum container well.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway plan view showing the overall structure of a torus-type nuclear fusion device, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is a vertical sectional side view showing a conventional vacuum vessel support device. , FIG. 4 is a plan view of the same, FIG. 5 is a longitudinal cross-sectional side view showing a vacuum container support device according to an embodiment of the present invention, and FIG. 6 is a plan view of the same. 3... Thick ring part, 4... Bellows part (high resistance part), 5... Toroidal magnetic field coil, 13...
Support rod, 14... horizontal beam, 15... beam support.

Claims (1)

[Scope of Claims] 1. The thick ring portion of the vacuum container, which is composed of thick ring portions and high resistance portions arranged alternately in the torus direction, is supported by a support rod from below, wherein the support rod is A vacuum vessel support device for a torus-type nuclear fusion device, characterized in that the device is disposed at the center of the thick ring portion in the torus direction. 2. The torus type according to claim 1, characterized in that the support rod is supported via a horizontal beam extending horizontally in a toroidal direction, and by beam supports extending vertically at both ends of the horizontal beam. Vacuum vessel support device for nuclear fusion equipment. 3. The vacuum vessel support device for a torus-type nuclear fusion device according to claim 1, wherein the support rod and the vacuum vessel are connected by a pin connection.