JPS608471B2 - nuclear fusion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nuclear fusion device, and more particularly to a nuclear dissociation device with improved support for a toroidal magnetic field coil employed in a torus-type nuclear fusion Hishitaka.

Generally, a torus-shaped fusion bag, as shown in Fig. 1, includes a torus-shaped vacuum vessel 1 that encloses plasma, and a magnetic field that surrounds the vacuum vessel and is placed at a predetermined interval in the circumferential direction of the torus for plasma confinement. It has a plurality of toroidal magnetic field coils 2 that generate .

Since the individual toroidal magnetic field coils 2 are arranged in the shape of a torus, they are usually cut out on the inside of the torus, resulting in a sector-type structure with cutouts, as shown in FIG. 2.1
In a device that confines high-temperature, high-density plasma that reaches billions of degrees, the toroidal magnetic field coil 2 needs to generate a high magnetic field of several tens of thousands of Gauss, which makes it large in size and extremely heavy.

Conventionally, as a method of supporting this toroidal magnetic field coil 2, an inner leg 3a and an outer leg 3b are provided at two lower parts of the toroidal magnetic field coil 2, and the weight of the toroidal magnetic field coil 2 is distributed almost equally to each leg. I was taking it.

According to this method of support, when the toroidal magnetic field coil 2 is not energized, the weight of the toroidal magnetic field coil 2 itself is
The two chests 3a and 3b equally receive the force, and the base acting force f of the inner leg 3a, the basic acting force f2 of the inner leg 3a, and the outer leg 3
The base action size X3 of b and the basic action force f of the outer leg 3b
A force approximately equal to 4 is applied. However, when a predetermined current is applied to the toroidal magnetic field coil 2, an electromagnetic force m is generated in the toroidal magnetic field coil 2 in the direction of the torus center as shown in FIG. The toroidal magnetic field coil 2 is pushed toward the center block 4 because it reaches ten times as large. On the other hand, since the center block 4 is usually made by stacking several cylindrical blocks, there is no binding force in the vertical direction, so the toroidal magnetic field coil 2 is thermally deformed due to the heat generated by the coil when energized. , due to the thermal expansion of the two chests 3a and 3b from the center of the toroidal magnetic field coil 2 to the tip of the leg.
Of the two legs 3a and 3b, the one with a lower temperature rise floats up, resulting in the entire weight of the toroidal magnetic field coil 2 being supported by one leg. In particular, since the inner part of the toroidal magnetic field coil 2 has the notch part 7, the current density is higher than other parts, and the temperature rise is also large. That is, the temperature rise distribution in the circumferential direction of the toroidal magnetic field coil 2 is approximately as shown in FIG. That is, in this figure, the vertical axis shows the temperature rise t, and the axis shows the circumferential direction angle 8 of the toroidal magnetic field coil, and it can be seen that the temperature rises extremely in one section of the notch. As a result, as shown in Fig. 4, a thermal expansion difference G occurs between the inner and outer legs 3a and 3b, and therefore, the inner chest 3a bears most of the weight of the toroidal magnetic field coil 2. The base acting force L' and the basic acting force f2' of the inner and outer legs 3a act intensively on the central part of the base 5 and the base 6, resulting in a decrease in strength. However, there were drawbacks that made it extremely disadvantageous.
The present invention has been made in view of the above points, and its purpose is to prevent force from being concentrated on the base, foundation, etc. that supports the toroidal magnetic field coil regardless of whether it is in operation or not, thereby increasing the strength. An object of the present invention is to provide a fusion device that solves the above problems.

In the present invention, a plurality of toroidal magnetic field coils that surround a vacuum container that stores plasma therein, are arranged at predetermined intervals in the circumferential direction of the torus, and each of the toroidal magnetic field coils that generate a magnetic field for plasma confinement is directed outward from the center of the torus. The radially outer side is supported on the base via the legs, and the center side of the torus is assembled with the lower part of each of the toroidal magnetic field coils with all the toroidal magnetic field coils assembled to form a substantially cylindrical seat, The seat is supported by a central block that supports the centripetal force acting on the toroidal magnetic field coil by ironing a cylindrical ring, and the toroidal magnetic field coil is constantly pressed against the central block by the internal pressure generated by the alignment of the cylindrical ring, thereby achieving the desired purpose. It was made to be achieved.

The present invention will be described below based on embodiments shown in the drawings.

Incidentally, the same reference numerals are used for the same parts as in the past. 6th
An embodiment of the present invention is shown in FIG.

The schematic configuration of the embodiment shown in the figure is "mostly the same as the conventional one, and the explanation here will be omitted. In this embodiment,
Instead of using the conventional inner chest, the load of the toroidal magnetic field coil 2 is supported only by the outer chest 3b.In addition, when all the toroidal magnetic field coils 2 are installed near the center of the torus of the toroidal magnetic field coil 2, a cylinder is formed. A circular seat surface 2a having a round shape is provided, and a cylindrical ring 8 is joined to the circular seat surface 2a.Moreover, the rigidity of this cylindrical ring 8 is such that the internal pressure f5 generated when it is iron-fitted to the circular seat surface 2a is , outer leg 3M
It has a rigidity that exceeds the sliding resistance N. That is,
During operation, the outer legs 3b extend outward due to thermal expansion, but the toroidal magnetic field coil 2 is always connected to the center block 4 by the internal pressure f5 generated by the iron joint of the cylindrical ring 8 so that the outer legs 3b will return to their original state when the operation is stopped. It is something that is being forced upon. By using the horizontal construction of this embodiment, the toroidal magnetic field coil 2 can be operated regardless of whether it is in operation or not.
Since it always stands on its own with one leg, the load can be handled by the 3 outer legs and the pressure-receiving area can be large. Therefore, the force acting on the base 5 and the foundation 6 can be reduced by 'f4'.
This has a great effect on the strength of the base 5 and the foundation 6.

According to the nuclear fusion device of the present invention described above, each of the toroidal magnetic field coils has its radially outer side facing outward from the torus center supported on the base via the legs, and the toroidal magnetic field coil on the torus center side. At the bottom of each of the
A seat is provided in which all of the toroidal magnetic field coils are assembled into a substantially cylindrical shape, and a cylindrical ring is integrated with the seat and supported by the center block, and the internal pressure generated by the iron fitting of this cylindrical ring constantly generates a toroidal magnetic field. Since the coil is pressed against the center block, even when the outer legs are restored, the internal pressure generated by the cylindrical ring's cylindrical ring is constantly pushing the toroidal magnetic field coil against the center block, so there is no force on the base, foundation, etc. inside. This eliminates the need for concentration, which solves the problem of strength.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of a conventional torus-type fusion device, Figure 2
The figure is a sectional view taken along line A-A in Figure 1, Figure 3 is a diagram of the temperature rise characteristics of the toroidal magnetic field coil at different angles in the circumferential direction, and Figure 4 is the load distribution when a thermal expansion difference G occurs between the medial and lateral legs. FIG. 5 is a cross-sectional view of a torus-type nuclear fusion device showing an embodiment of the present invention, and FIG. 6 is a cross-sectional view taken from B to B in FIG. 5. It is. 1... Vacuum container, 2... Toroidal magnetic field coil, 2
a...Circular seat surface, 3a...Inner leg, 3b...
...Outside leg, 4...Central block, 5...
1 Base・6...Foundation, 7...Notch, 8...
・Cylindrical ring. Aoi J Zutsutomu 2 Zuko 3 Phantom Disciple Zuzuzu Penetrating Fungi

Claims (1)

[Claims] 1 A vacuum container that stores plasma inside, a plurality of toroidal magnetic field coils that surround the vacuum container and are arranged at predetermined intervals in the circumferential direction of the torus and generate a magnetic field for plasma confinement, and a toroidal magnetic field coil that is based on the toroidal magnetic field coil. In the nuclear fusion device, each of the toroidal magnetic field coils has a leg portion that supports the toroidal magnetic field coil, and a center block that is disposed approximately at the center of the vacuum vessel and that supports the centripetal force acting on the toroidal magnetic field coil. The radially outer side facing outward is supported on the base via the legs, and the toroidal center side is assembled to the lower part of each of the toroidal magnetic field coils with all the toroidal magnetic field coils incorporated, so that the toroidal magnetic field coil is assembled into a substantially cylindrical shape. A cylindrical ring is fitted into the seat and supported by the center block, and the toroidal magnetic field coil is constantly pressed against the center block by internal pressure generated by the fitting of the cylindrical ring. nuclear fusion device.