JPS6220516B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a torus-type nuclear fusion device, and more particularly, to a torus-type nuclear fusion device that improves the support of a plurality of toroidal magnetic field coils that surround a vacuum vessel and are arranged at predetermined intervals in the direction of the torus. Regarding equipment.

Figures 1 and 2 show the schematic structure of a torus-type fusion device. As shown in the figure, in the toroidal fusion device, a plurality of toroidal magnetic field coils 3 are arranged at predetermined intervals in the toroidal direction so as to surround a toroidal vacuum vessel 2 in which plasma 1 is generated. The coil 3 is attached to a lower pedestal 5 and an upper pedestal 6 via support members 3a with the outer periphery of the center column 4 as a reference.
Further, the vacuum container 2 is supported by a vacuum container support arm 8 extending from a support 7 connecting the lower pedestal 5 and the upper pedestal 6. Further, around the vacuum vessel 2, a plurality of poloidal magnetic field coils 9 for controlling the plasma 1 are arranged along the vacuum vessel 2. Note that 10 is a vacuum evacuation device for evacuating the inside of the vacuum container 2 to a vacuum state.

By the way, in a torus-type fusion device having such a configuration, one of the electromagnetic forces generated in the toroidal magnetic field coil 3 is a force that acts in the opposite direction to the torus direction above and below the toroidal magnetic field coil 3, that is, a toroidal magnetic field. A moment is generated that causes the coil 3 to fall over. Generally, as a method for supporting this, a T-shaped support member 3a is provided on the toroidal magnetic field coil 3 as shown in FIG. A fixed method is used. As another method, as shown in FIG. 4, a convex portion 12a is provided above the support arm 12, which is a support member, and the support arm 12 is placed in a concave portion 6a provided on the upper frame 6 facing the convex portion 12a. There is a method of inserting and fixing the convex portion 12a of the toroidal magnetic field coil 3 (in addition, although only the upper half of the toroidal magnetic field coil 3 is shown in FIGS. 3 and 4, the lower half of the toroidal magnetic field coil 3 is also the same). ). In this way, the electromagnetic force fl (overturning force) generated in the toroidal magnetic field coil 3 is transmitted to the upper and lower frames 5 and 6.

However, in recent years, torus-type fusion devices have become larger and the electromagnetic force required for the coils has also been increasing. In particular, the toroidal magnetic field coil 3 generates a strong electromagnetic force, so the above-mentioned This type of support system has the following concerns.

For example, in the support method shown in FIG. 3 in which the mounting bolts 11 are supported via the support member 3a, it is necessary to increase the diameter of the mounting bolts 11, increase the number of bolts, or use high-strength bolts in order to withstand strong electromagnetic force. must be taken into consideration. However, the installation space of the toroidal magnetic field coil 3 in the device, the upper and lower frames 5, 6,
Considering the strength of the support member 3a, assembly and installation, etc., the support method shown in FIG. 3 is difficult to implement. Furthermore, in the support method using the support arm 12 with the convex portion 12 shown in FIG. The force Fl acting on 12 is the sum of the forces fl in the same direction among the electromagnetic forces generated in each part of the coil.) This bending moment M is received by the convex portion 12a, the concave portion 6b of the upper frame 6, and the upper frame 6.
There is a high stress concentration in the structure, and rigidity becomes a problem.

The present invention has been made in view of the above points, and its purpose is to provide good support to a toroidal magnetic field coil without worrying about rigidity even if a strong electromagnetic force (falling force) is generated. The objective is to provide a torus-type nuclear fusion device that can perform

The present invention includes a supporting member that surrounds a toroidal vacuum container and supports a plurality of toroidal magnetic field coils arranged at predetermined intervals in the toroidal direction on upper and lower frames. The intended purpose is achieved by integrally forming a support beam for connecting the support beams and a connecting beam for connecting the support beams.

Hereinafter, the present invention will be explained in detail based on embodiments shown in the drawings. Incidentally, the same reference numerals are used for the same parts as in the past.

FIG. 5 shows an embodiment of the present invention. As shown in the figure, in this embodiment, each toroidal magnetic field coil 3 is supported on an upper frame 6 using a portal arm 13. As shown in an enlarged view in FIG. 6, this portal arm 13 is composed of a supporting beam 13a located between the toroidal magnetic field coils 3, and a connecting beam 13b connecting two of these beams at one end at a predetermined interval. Ru. The combined beam 13b extends outward in the torus direction from the ends of both support beams 13a by half the width of the toroidal magnetic field coil 3,
Further, a keyway 13d is provided on the extended end surface. The portal arms 13 are connected by keys 14 inserted across the key grooves 13d of adjacent portal arms 13, and are formed in a ring shape in the torus direction. Toroidal magnetic field coils 3 are arranged alternately in the connecting parts. Each portal arm 13 connected by a key 14 is attached to the upper frame 6 by a mounting bolt 15, respectively.

The situation of each part when an electromagnetic force acts on the support structure of the toroidal magnetic field coil 3 having the configuration of this embodiment will be explained.

Electromagnetic force fl (falling force) on toroidal magnetic field coil 3
When this occurs, a bending moment M acts on the portal arm 13, but this portal arm 13 does not have a notch like a dovetail. Support beam 1
3a and the joint beam 13b are integrally formed, the stress acting fundamentally on the gate-shaped arm 13 is greatly reduced, and since it is formed in a ring shape in the torus direction, the rigidity is also improved. Also, the 6th
When a falling force Fl acts on the portal arm 13 as shown in the figure, an upward force Fu is generated at one end of the joint connected by the key 14 of the portal arm 13, and an upward force Fu is generated at the other end surface. A downward force like this is generated. Therefore, as shown in FIG.
Since they are connected by , the forces Fu and Fd generated at each end cancel each other out at the joint surface. In this way, the vertical forces Fu and Fd acting on the portal arm 13 are eliminated,
In order to transmit force to the upper frame 6, it is sufficient to transmit only the shear force due to the overturning force. Therefore, it is sufficient to adopt a mounting structure to the frame that can withstand only the shearing force, and a simple structure such as fixing with the mounting bolts 15 can be used. Furthermore, there is no machining part that requires precision like a dovetail,
It is made up of surfaces that are easy to process, which improves processing accuracy and allows for relatively easy assembly.

FIG. 7 shows another embodiment of the present invention. In the above-described embodiment, the portal arms 13 are connected to each other, but as shown in FIG. side part, and portal arm 1
The key 16 may be inserted into a key groove provided on the side of the portal arm 3' so as to straddle the two and connect them, thereby canceling out the vertical force acting on the portal arm 13'.

Even with this configuration, the effect is the same as that of the embodiment described above.

In addition, although each of the above-mentioned embodiments shows the support structure for the upper half of the toroidal magnetic field coil 3, it goes without saying that the lower half is also supported in the same way.

According to the toroidal fusion device of the present invention described above, each toroidal magnetic field coil, which surrounds a toroidal vacuum vessel and is arranged in plurality at predetermined intervals in the torus direction, is supported on the upper and lower frames. Since the support member is integrally formed with the support beams disposed between the toroidal magnetic field coils and the coupling beam for coupling the support beams, a strong electromagnetic force is not applied to the toroidal magnetic field coils. Even if a falling force is generated,
Since the support beam and the combined beam are integrated and supported by the support member, the toroidal magnetic field coil can be well supported without worrying about rigidity, so it is suitable for use in this kind of torus-type fusion device. is very effective.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing the schematic configuration of a torus-type nuclear fusion device, Figure 2 is a partially sectional plan view of Figure 1, and Figures 3 and 4 are of a conventional toroidal magnetic field coil. a perspective view schematically showing a support part;
FIG. 5 is a perspective view of a support part of a toroidal magnetic field coil showing one embodiment of the present invention, FIG. 6 is a perspective view of a portal arm shown in FIG. 5, and FIG. 7 is a perspective view of another embodiment of the present invention. FIG. 3 is a cross-sectional view of the support portion of the toroidal magnetic field coil shown in FIG. 2... Vacuum container, 3... Toroidal magnetic field coil, 5... Lower mount, 6... Upper mount, 13, 13'
...Portal arm, 13a...Support beam, 13b
...Combined beam, 13d...Keyway, 14, 16
...Key, 15...Mounting bolt.

Claims (1)

[Scope of Claims] 1. A toroidal magnetic field coil that surrounds the vacuum vessel and is arranged at predetermined intervals in the direction of the torus. In a torus-type nuclear fusion device including upper and lower frames that support magnetic field coils via support members, each of the support members couples the support beams with support beams disposed between the toroidal magnetic field coils. A torus-type nuclear fusion device characterized by being formed integrally with a combined beam for 2. The torus-type nuclear fusion device according to claim 1, wherein the support member is formed into a substantially gate shape in combination with an adjacent support member. 3 between the support members adjacent in the torus direction,
2. The torus-type nuclear fusion device according to claim 1, wherein a part of the pedestal is made to protrude, and a protrusion of the pedestal is connected to a support member. 4 Key grooves are provided on the side of the support member and the side of the protrusion of the pedestal, and a key is inserted across both key grooves to connect the support member and the protrusion of the pedestal. Claim 3
The torus-type nuclear fusion device described in . 5 A toroidal magnetic field coil in which plasma is generated inside, a plurality of toroidal magnetic field coils surrounding the vacuum container and arranged at predetermined intervals in the direction of the torus, and a supporting member for each of the toroidal magnetic field coils. In a torus-type nuclear fusion device, each support member includes a support beam disposed between the toroidal magnetic field coils, and a coupling beam for coupling the support beams together. A torus-type nuclear fusion device characterized in that it is integrally formed and that adjacent support members are connected to each other to form a ring shape in a torus direction. 6. The support member is formed into a substantially gate-shaped structure in which a support beam that clamps both side surfaces of the toroidal magnetic field coil and a coupling beam that couples these together are integrated, and both ends of the coupling beam are aligned in a torus direction. 6. The torus-type nuclear fusion device according to claim 5, wherein adjacent support members are connected to each other via the protrusion. 7. The torus-type nuclear fusion device according to claim 6, wherein the protrusion of the combined beam protrudes in the torus direction by approximately half the width of the toroidal magnetic field coil. 8. A key groove is provided in the end face of each protruding part of the coupling beam, and a key is inserted into the adjacent key groove so as to straddle both of them to connect them to each other. 7. The torus-type nuclear fusion device according to item 7.