JPS6018034B2 - nuclear fusion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nuclear fusion device, and particularly relates to a toroidal fusion device that surrounds a torus-shaped vacuum vessel and arranges a plurality of toroidal coils at predetermined intervals in the direction of the torus, each of which is connected to the inside of the torus. It relates to a support structure that is supported on a base from the outside.

As shown in FIG. 1, the torus-type nuclear fusion rhombus includes a torus-shaped vacuum vessel which seals plasma inside, and a plurality of vacuum vessels surrounding the vacuum vessel 1 and arranged at predetermined intervals in the direction of the torus for containing the plasma. It has a toroidal coil 2 that generates a magnetic field.

Since each toroidal coil 2 is arranged in a toroidal shape, a notch 21 tapered from the center of the fusion device is formed to form a sector-shaped structure as shown in FIGS. 2 and 3. "This toroidal coil 2 has a high temperature (1
In order to confine a high-density plasma (100 million degrees) into the vacuum vessel 1, it is necessary to generate a high magnetic field of tens of Gauss in directions, which results in large dimensions and heavy weight. Normally, in order to support the large toroidal coil 2, a leg part 3a supporting the inner side near the center of the torus at the lower part of the toroidal coil 2 and a leg part 3b supporting the outer side opposite to the toroidal coil 2 are attached to a base on a concrete ground 4. 5, so that the weight of the toroidal coil 2 is equally supported by each leg 33, 3b. In such a support structure for the toroidal coil 2, when the toroidal coil 2 is not energized, the weight of the toroidal coil 2 is equally distributed between the two legs 3a and 3b, so the base 5 and the concrete ground 4 Also, as shown in FIG. 1, f,,ra,ra. An equal force of f4 acts. However, when a predetermined current is applied to the toroidal coil 2, an electromagnetic force m is generated in the toroidal coil 2 toward the center of the torus, as shown in FIG. The toroidal coil 2 is pushed toward the center block 6 by the centripetal force.The center block 6 is a stack of several cylindrical ring-shaped objects and is not constrained in the vertical direction. , toroidal coil 2
When heat is generated and thermal deformation occurs, the one with a lower temperature rise rises due to thermal elongation of each of the legs 3a and 3b, resulting in the weight of the toroidal coil 2 being shared by only one leg.
Normally, the inner part of the toroidal coil 2 has a notch 21, and the fin flow density of the toroidal coil 2 is high and the temperature rise is also larger than that of the outer circumference. As shown in FIG. 6, the temperature rise is most intense at the notch 2, and therefore a difference G in thermal expansion occurs between the inner leg 3a and the outer leg 3b, as shown in FIG.
Therefore, the weight of the toroidal coil 2 is almost the same as that of the inner leg 3.
It will be supported by a. As a result, as shown in FIG. 5, loads F and PF2 are applied intensively to the central portion of the base 5, which is extremely disadvantageous in terms of the strength of the base 5 and the concrete ground 4. The purpose of the present invention is to provide a nuclear fusion device that can bear the weight of the toroidal coil evenly even if there is a difference in temperature rise between the inside and outside of the toroidal coil, and that does not cause strength problems to the base or concrete ground. It is to provide.

The present invention makes the inner leg that supports the center side of the torus at the lower part of the toroidal coil shorter than the outer leg that supports the opposite side. The support is fixed via a heat insulating material at the position of the length of the inner leg having the corresponding amount of thermal expansion, and the entire length of the inner leg to which the support is fixed is formed to be approximately the same as the length of the outer leg. The above object is achieved by supporting the torus center side of the lower part of the toroidal coil on the base via a support.

Next, the present invention will be explained in more detail with reference to an embodiment shown in FIGS. 6 and 7. ``The same parts as in the conventional example are given the same reference numerals and the explanation thereof will be omitted.In this embodiment,
The inner leg portion 3a is formed shorter than the outer leg portion 3b, and the amount of thermal elongation of the inner leg portion 3a corresponding to the amount of thermal elongation occurring in the length 1 of the outer leg portion 3b due to thermal deformation of the toroidal coil 2 is Find the position at a length of 12 from the center of the toroidal coil 2.

Even if the same material is used, the inner leg 3a is better than the outer leg 3b.
When the toroidal coil 2 is not energized, the shorter length 12 causes the same thermal elongation as the outer leg 1 when the toroidal coil 2 is energized. Attach the support 8 with bolts 10 through the heat insulating material 9 as shown in Fig. 7 at 12 points from the center of the toroidal coil.The inner leg 3a with the support 8 attached is connected to the outer leg 3b. In the embodiment of the present invention configured in this way, thermal fascia occurs due to the temperature rise of the toroidal coil 2, and furthermore,
Even if there is a difference in temperature rise between the torus center side and the outside of the toroidal coil 2, the amount of thermal expansion of the inner leg portion 3a over a length of 12 from the center of the toroidal coil 2 is equal to the length of the outer leg portion 3b by 1. Since the heat of the inner leg 3a is not transmitted to the support 8 due to the heat insulating material 9, the increase in the temperature of the toroidal coil 2 causes the inner leg 3a and the outer leg 3 to expand.
Even if b expands thermally, the support 8 and the lower end portions of the outer leg portions 3b will expand by exactly the same amount.

Therefore, the weight of the toroidal coil 2 is always borne equally by the inner legs 3a and outer legs 3b regardless of whether the temperature rises or not, and there is no problem with the strength of the base and concrete ground. In the above embodiment, the support 8' is attached to the inner leg 3a via the bolt 0, but the fastening of the support 8 is not limited to this, and other known fastening means may be used. May be used.

In the nuclear fusion device of the present invention described above, the outer legs supporting the torus center side at the bottom of the toroidal coil are
On the other hand, the inner leg is shorter than the outer leg that supports the opposite side, and has a thermal extension nose corresponding to the amount of thermal expansion of the outer leg due to thermal deformation of the toroidal coil. In addition to fixing the support through the edge material, the entire length of the inner leg with the support rotated is approximately the same as the length of the outer leg, and the center side of the torus at the bottom of the toroidal coil is attached to the base via the support. Even if there is a difference in temperature rise between the inside and outside of the toroidal coil, the legs that support the toroidal coil have the same amount of thermal expansion, so the weight of the toroidal coil can be borne evenly, and the base Also, there are no problems with the strength of the concrete ground.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view schematically showing a conventional torus-shaped fusion bag layer, Fig. 2 is a cross-sectional view taken along the Rho 0 line in Fig. 1, Fig. 3 is a perspective view of a toroidal coil, and Fig. 4 is A characteristic diagram showing the temperature rise distribution in each part of the toroidal coil, Fig. 5 is a cross-sectional view of a part showing the deformation state of the legs in a conventional nuclear fusion device, and Fig. 6 is a diagram showing the implementation of the nuclear dissociation device of the present invention. FIG. 7 is a cross-sectional view showing the supported state of the toroidal coil portion in the example, and FIG. 7 is a side view along the skin line in FIG. 6. 1... Vacuum container, 2... Toroidal coil, 3a...
...Inner leg, 3b...Outer leg, 4...Concrete ground, 5...Base, 6...Center block, 8...Support, 9... ...Thermochromic edging material. Octopus - boxed leopard, 2 figures, Tsutomu, 3 figures, younger brother Buddha, Tsutomu, leopard, 6 figures, 7 figures

Claims (1)

[Claims] 1. A toroidal vacuum vessel that confines and holds plasma inside, a plurality of toroidal coils surrounding this vacuum vessel and arranged at predetermined intervals in the direction of the torus, and a lower part of each toroidal coil arranged between the inner side near the center of the torus and the toroidal coil. and legs each supported on a base on opposite sides, the inner leg is shorter than the outer leg to accommodate the amount of thermal expansion of the outer leg due to thermal deformation of the toroidal coil. The support is fixed via a heat insulating material at a position corresponding to the length of the inner leg that has a thermal expansion amount of A nuclear fusion device characterized by supporting the center side of the torus at the bottom of the toroidal coil as a base.