JPH0519669B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a poloidal coil support device for a torus-type nuclear fusion device, and particularly to a poloidal coil support device for supporting a poloidal coil from the inner and outer circumferential sides of the torus center via support legs. The present invention relates to a poloidal coil support device for a torus-type nuclear fusion device suitable for use in a torus-type nuclear fusion device.

[Background of the invention]

FIGS. 1 and 2 are diagrams showing the schematic structure of a torus-type nuclear fusion device in which a conventional poloidal coil is arranged inside a toroidal coil. In the figure, on the outer periphery of the toroidal vacuum container 1,
A plurality of toroidal coils 2 that generate a toroidal magnetic field serving as the core of plasma are arranged at predetermined intervals in the torus direction. On the other hand, between the toroidal coil 2 and the vacuum vessel 1, a poloidal coil 3 that generates a poloidal magnetic field that induces and controls plasma current is installed concentrically with the vacuum vessel 1. The vacuum container 1 has a vacuum inside and holds plasma 4 therein, and is composed of a thick wall portion 5 and a bellows portion 6, and the bellows portion 6 absorbs thermal stress. Further, a vacuum evacuation device 7 is connected to this vacuum container 1, and the inside of the vacuum container 1 is evacuated by this evacuation device 7. Furthermore, an alternator 8 is provided that passes through the center of the torus of the vacuum vessel 1 and circulates outward.
Moreover, the poloidal coil 3 is the toroidal coil 2
These poloidal coil support plates 9 are supported by ring-shaped poloidal coil support plates 9 installed on the inner circumference side of each of the poloidal coil support plates 9. It is supported on a lower pedestal 12 via inner peripheral side support legs 11 arranged on the inner peripheral part.

In the poloidal coil 3, a vertical electromagnetic force 14 of a main radial electromagnetic force 13 as shown in FIG. 3 is generated due to interaction between the coils. usually,
The main radial electromagnetic force 13 is carried by the coil itself, but a poloidal coil support device is required to support the vertical electromagnetic force 14.

By the way, as shown in FIG. 4, as an example of a conventional method for supporting the poloidal coil 3,
As shown in Japanese Patent No. 63474, there is an example in which a reinforcing layer is provided on the toroidal coil 2 to support the poloidal coil 3. When such a conventional example is applied to a large device, the toroidal coil 2 is displaced due to temperature rise and electromagnetic force, resulting in problems such as gaps occurring in the support portion of the poloidal coil 3 and the coil being subjected to forced displacement. A point occurs.

Therefore, in a large device, a structure must be provided in which a poloidal coil support device independent of the toroidal coil 2 is provided. In this structure, with respect to the vertical electromagnetic force 14, it is appropriate to increase the rigidity by forming the poloidal coil support device in a ring shape within the toroidal coil, and to support it as an internal force of the poloidal coil support device. However, the main radial reaction force when sliding the own weight and thermal expansion of the coil needs to be supported from the lower frame 12 outside the toroidal coil. As a result, as shown in FIGS. 1 to 3, the conventional poloidal coil support device in a large-sized device utilizes the space between the toroidal coils 2 to connect the outer support leg 10 and the inner support leg from the lower frame 12. It has a structure that is supported through 11.

However, the problem with the above conventional support structure is that the space between the toroidal coils 2 is narrow in the part where the inner support legs 11 are arranged, as shown in FIG. Since it is necessary to consider the distribution and the toroidal coil 2 must be penetrated, the inner circumferential support leg 11 has an elongated structure. For this reason, the conventional inner support leg 1
1 cannot have sufficient rigidity, and there is a risk that the inner support leg 11 may buckle under its own weight.

Therefore, in order to avoid the buckling described above, if the inner support leg 11 is made larger as shown in FIG. 6 to have sufficient rigidity, there will be no space for arranging the vacuum container measurement port 15, etc. This will cause problems in the measurement of fusion devices. Note that in FIGS. 5 and 6, reference numeral 16 indicates an insulating plate.

[Purpose of the invention]

SUMMARY OF THE INVENTION In view of the above drawbacks, an object of the present invention is to provide a poloidal coil support device for a torus-type nuclear fusion device, which is space-saving, has sufficient rigidity, and is provided with inner support legs that do not buckle.

[Summary of the invention]

The present invention is characterized in that the inner circumferential support legs protruding from both sides of each ring-shaped support plate are arranged in slidable contact with the side surfaces of the toroidal coil, and the inner circumferential side protruding from other adjacent supports. By integrating it with the support leg, the intended purpose is achieved.

[Embodiments of the invention]

Hereinafter, embodiments of the present invention will be described with reference to the drawings, using the same reference numerals for the same parts as in the conventional example. FIG. 7 is a diagram showing an embodiment of the poloidal coil support of the torus-type nuclear fusion device of the present invention. The poloidal coil support device that supports the poloidal coil 3 includes a ring-shaped support plate 9 that is installed on the inner peripheral side of each toroidal coil 2 and supports the poloidal coil 3.
, an outer support leg 10 that supports the poloidal coil 3 by being disposed between the ring-shaped support plates 9 on the outer circumference with respect to the center of the torus, and between ring-shaped support plates 9 on the inner circumference with respect to the center of the torus. It is composed of inner support legs 11 which are arranged and whose parts protrude in the torus direction from each support plate 9 support the poloidal coil 3 integrally with other adjacent support plates 9, and these outer support legs The poloidal coil 3 is supported on a lower pedestal 12 (not shown) by 0 and inner support legs 11. In this embodiment, the inner support legs 11 protruding from both sides of the ring-shaped support plates 9 are arranged in slidable contact with the side surface of the toroidal coil 2 via an insulating material 17, In addition, the poloidal coil 3 is supported on the lower pedestal 12 by integrally supporting the inner peripheral side support legs 11 in the torus direction extending from other adjacent support plates 9. The reason why the insulating material 17 is provided is that when the side plate of the toroidal coil 2 and the inner support leg 11 are brought into direct contact, an electrical loop is formed through the contact portion, and a large eddy current is generated during plasma startup. This is to avoid flowing into this lube.

According to this embodiment, the inner support legs 11 protruding from both sides of each ring-shaped support plate 9 are arranged in slidable contact with the side surface of the toroidal coil 2 via the insulating material 17, and The structure is such that the poloidal coil 3 is supported on the lower pedestal 12 by being integrated in the torus direction with the inner peripheral side support leg 11 protruding from another adjacent support plate 9, so that the support leg is formed elongated to save space. Even if the support leg is intended to be used, it has the effect of restraining the support leg from deforming out of plane and preventing buckling, and the inner support leg 11 can have sufficient strength in a small space. In addition, since the contact surface between the inner support leg 11 and the toroidal coil 2 is structured to be slidable, the deformation of the toroidal coil 2 is not transmitted to the poloidal coil support device, and the poloidal coil 3 is not subjected to forced displacement due to the deformation of the toroidal coil 2. is avoided.

FIG. 8 shows another embodiment of the present invention,
In this example, the support foot 11 is insulated by wrapping the insulating tape 18 around the inner support foot 11, so the other structure is the same as the example shown in FIG. 7, so the same effect can be achieved. be.

〔Effect of the invention〕

According to the poloidal coil support device for a toroidal fusion device of the present invention described above, the inner support legs protruding from both sides of each ring-shaped support plate are arranged so as to be slidably in contact with the side surfaces of the toroidal coil. , and because the poloidal coil is supported integrally with the inner support legs protruding from other adjacent supports, it is possible to save space by forming the inner support legs long and thin. , the inner support leg can be restrained from deforming out of plane to prevent buckling, and the inner support leg can have sufficient strength in a small space; , has a structure that allows the contact surface between the inner support leg and the toroidal coil to slide.
The deformation of the toroidal coil is not transmitted to the poloidal coil support, and the poloidal coil is prevented from undergoing forced displacement due to the deformation of the toroidal coil, so it is very effective when supporting the poloidal coil of a torus-type nuclear fusion device.

[Brief explanation of drawings]

Fig. 1 is a plan view showing a schematic structural example of a conventional torus-type fusion device, Fig. 2 is a vertical cross-sectional view of the fusion device shown in Fig. 1, and Fig. 3 is an example of a conventional poloidal coil support device. FIG. 4 is a schematic sectional view showing an example of a conventional poloidal coil support method, and FIGS. 5 and 6 show detailed examples of the conventional poloidal coil support device shown in FIGS. 1 to 3. 7 is a cross-sectional view showing one embodiment of the poloidal coil support device for the torus-type fusion device of the present invention, and FIG. 8 is a cross-sectional view showing another embodiment of the poloidal coil support device for the torus-type fusion device of the present invention. FIG. 2 is a cross-sectional view of main parts showing an example. 1... Vacuum container, 2... Toroidal coil, 3
... Poloidal coil, 9 ... Poloidal coil support, 10 ... Outer circumference side support leg, 11 ... Inner circumference side support foot, 12 ... Lower frame, 17 ... Insulating material, 18
...Insulating tape.

Claims (1)

[Claims] 1. A toroidal vacuum vessel, a plurality of toroidal coils surrounding the vacuum vessel and arranged at predetermined intervals in the circumferential direction of the torus, and between the toroidal coil and the vacuum vessel. , comprising a plurality of poloidal coils arranged concentrically with the vacuum vessel, and a plurality of poloidal coil supports supporting the poloidal coils on a lower pedestal, the poloidal coil supports being arranged on the inner peripheral side of each of the toroidal coils. a support plate on a ring that is installed at the center of the torus to support the poloidal coil; an outer support leg that is placed between the ring-shaped support plates at the outer periphery with respect to the center of the torus to support the poloidal coil; an inner circumferential side support disposed between the ring-shaped support plates on the inner circumferential portion, and in which a portion protruding from each support plate in the torus direction is integrated with other adjacent support plates to support the poloidal coil; In the poloidal coil support device for a toroidal fusion device, each of the inner circumferential side support legs protruding from both sides of the ring-shaped support plate is arranged in slidable contact with a side surface of the toroidal coil, A poloidal coil support device for a torus-type nuclear fusion device, characterized in that it is integrated with an inner support leg extending from another adjacent support body. 2. A patent characterized in that the inner support leg is brought into contact with the side surface of the toroidal coil via an electrical insulator, and an electrical insulator is also interposed between adjacent inner support legs. A poloidal coil support device for a torus-type nuclear fusion device according to claim 1.