JPS60235088A - Central support post for tokamak type nuclear fusion device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to the structure of a core support column in a tokamak type nuclear fusion device.

[Prior art]

FIG. 1 is a sectional view showing an example of a conventional nuclear fusion device of this type, which is generally referred to as a tokamak-type fusion reactor. In the figure, (1) is the first base, that is, the base;
(2) is the second base, that is, the foundation in this example, (3) is the center support column erected on the first base (1 inch through the insulation support leg (4), and (5) is the center support A plurality of toroidal coils are arranged around the pillar (3) so as to be almost closely supported by the central support pillar (3), and (6) these toroidal coils (5) are connected to the first base (1). This is a heat insulating support leg that insulates and supports the top. (7) is a poloidal coil, which is supported by a central support column (3) and a support beam (not shown). (8) is a vacuum chamber that maintains a vacuum inside. It is.

In addition, Fig. 2 shows a part of the center support column (3), where (9) is a center support column piece obtained by dividing the cylindrical center support column (3) into, for example, four parts in the radial direction, and oQ is an electrical The insulated dividing surface, 0υ, is a fitting portion with projections and depressions formed in order to combine the center support column pieces (9) into a single cylindrical column. This fitting portion is also electrically insulated.

Next, the operation will be explained. Plasma such as deuterium generated in the toroidal coil (5) by nuclear fusion is confined within the toroidal coil (5) by energizing the toroidal coil (5).
) to control the position. Plasma is extracted as thermal energy.

As described above, when the toroidal coil (6) is energized, a strong electromagnetic force, that is, a centripetal force acts on the toroidal coil (5) toward the center of the device. The central support column (3) receives this centripetal force and has the function of supporting the toroidal coil (5). In addition, a current is passed through the poloidal coil (7) by a transformer action, and in order to control the position and shape of the plasma, a current that generally fluctuates over time is intermittently passed through the poloidal coil (7). ) causes a time-varying magnetic flux that passes through the central support column (3).

Therefore, an eddy current is generated in the center support column (3) in the toroidal direction shown by the arrow in FIG. This eddy current is undesirable as it causes power loss and an error magnetic field, and must be reduced as much as possible. Therefore, as shown in FIG. 2, the central support column (3) is divided in the radial direction, and
Q is electrically insulated. In addition, in order to maintain the rigidity to support the strong electromagnetic force, the center support column piece (9)
The fitting portions 0υ that engage with each other are formed by recesses and recesses, and these are combined to form one support column.

Since the center support column (8) of the conventional tokamak-type fusion device has the above-mentioned structure, the shape of the center support column piece (9) is complicated, and machining requires a lot of time. Furthermore, the fitting part aυ requires high machining accuracy and is difficult to assemble.

[Summary of the Invention] This invention was made in order to eliminate the drawbacks of the conventional ones as described above. By providing a first fitting portion provided on the surface and extending in the axial direction, and a plurality of second fitting portions provided at predetermined intervals in the axial direction and extending in the radial direction on the dividing surface of the center support column piece. The object of the present invention is to provide a central support column for a tokamak type nuclear fusion device that has a simple structure and is easy to machine and assemble.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. 8th
4, and 5, (12a) is a first recess extending in the axial direction formed in the dividing plane QO, which is divided into seven parts of the center support column piece (3), and (18a) is the dividing plane (IQ a first key having a plurality of second recesses (12b) provided at predetermined intervals in the axial direction and extending in the radial direction; and (12b) having holes (18b) provided in the axial direction at the same intervals as the second recesses (18a); , (18c) is a second key inserted into the hole (13b).

In the center support column of the tokamak-type nuclear fusion device having the above-described structure, the center support column pieces (9) are gathered together to form a cylinder, and the adjacent first recess (12a) of the dividing plane OQ is placed in the center support column shown in FIG. The first key (12b) shown here is inserted and fitted in the axial direction to form a first fitting part (2). Next, the second key (18
c) is inserted into the hole (18b) formed in the adjacent second recess (18a) and first key (12b) of the dividing surface 01 in the radial direction to form the second fitting part 04. in this way,
First fitting part (2) in the axial direction, second fitting part 0 in the radial direction]
, the respective fittings have a simple structure, and a center support column having a high resistance to eddy currents and a mechanically strong structure can be easily processed and assembled.

In the above embodiment, the structure is assembled using the first key (12b) and the second key (18c), but as shown in FIG. 11)
The first concave portion (12a) extending in the axial direction provided in the first recess (12a) and the convex portion (12c) extending in the axial direction provided in the other dividing surface (10) of the center support column piece (9) adjacent thereto are fitted together. After forming the first fitting part (b) by forming the second fitting part (b), the second fitting part (b) is formed.
Even if the key (18c) is used, processing and assembly are relatively easy.

Further, in the above embodiment, the center support column (3) is divided into seven parts to form the center support column pieces (9), but the present invention is not limited to this. According to , a plurality of center support column pieces divided in the radial direction of a cylinder, a first fitting part provided on the dividing surface of the center support column pieces and extending in the axial direction, and a divided surface of the center support column pieces. and a plurality of second fitting portions provided at predetermined intervals in the axial direction and extending in the radial direction,
This has the effect of providing a central support column for a tokamak-type fusion device that is mechanically strong and easy to machine and assemble.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing the overall structure of a tokamak-type fusion charge, Fig. 2 is a perspective view showing a part of the central support column of a conventional tokamak-type fusion device, and Fig. 8 is a part of the present invention. A perspective view showing a central support column of a tokamak-type fusion device according to an embodiment,'
4 and 5 are perspective views respectively showing a first key forming a first fitting part and a second key forming a second fitting part according to an embodiment of the present invention, and FIG. FIG. 7 is a perspective view showing a center support column according to another embodiment of the present invention. (3)...Center support column, (9)...Center support column piece,
Of)...dividing surface, (2)...first fitting part, (13
...Second fitting part. In addition, in the figures, the same reference numerals indicate the same or corresponding parts. Agent Masuo Oiwa Figure 1 Figure 2 Figure 3 Figure 6 Procedural amendment (voluntary) 1. Indication of the case Patent application 2θ outside of Showa 4! l〆gi -2,
Title of the invention: Central support column 3 of a tokamak-type nuclear fusion device; Part 5: Representative Hitoshi Katayama of the person making the amendment; Claims column 6 of the specification subject to the amendment; Claims of the description of the contents of the amendment. shall be corrected as shown in the attached sheet. 7. One or more documents stating the scope of claims after the amendment to the list of attached documents A column piece, a first fitting part provided on the dividing surface of the center support column piece and extending in the axial direction, and the center support column On the divided side of the piece,
A central support pillar of a tokamak-type nuclear fusion device, which is provided with a plurality of second fitting parts that are provided at predetermined intervals in the axial direction and extend in the radial direction. (2) A first recess extending in the axial direction and a plurality of second recesses extending in the radial direction, which are provided at predetermined intervals in the axial direction, are formed on each dividing surface of the center support column piece, and the first recess extends in the radial direction. The part is configured by inserting a first key having holes provided in the axial direction at the same intervals as the second recess into the first recess of the adjacent center support column piece, and Claim 1, wherein the joint portion is configured by radially inserting the second key into the second recess of the adjacent center support column piece and into the hole of the inserted first key. The central support column of the tokamak-type nuclear fusion device according to item 1. (3) Each of the center support column pieces has a first portion extending in the axial direction on one dividing surface, a convex portion extending in the axial direction on the other dividing surface, and a second portion extending in the radial direction on the second fitting portion. It has two recesses, the first fitting part is configured by fitting the first recess and the protrusion of the adjacent center support column pieces, and the second fitting part is configured by:
The center support column of a tokamak-type fusion device according to claim 1, characterized in that the key is inserted into the second recess of the adjacent center support column piece.

Claims (3)

[Claims] (1) A plurality of center support column pieces divided in the radial direction of the cylinder, a first fitting part provided on the dividing surface of the center support column piece and extending in the axial direction, and a first fitting part provided on the division surface of the center support column piece. , a plurality of second parts are provided at predetermined intervals in the axial direction and extend in the radial direction.
The central support column of a tokamak-type fusion device with a mating part. (2) A first recess extending in the axial direction and a plurality of @2 recesses extending in the radial direction, which are provided at predetermined intervals in the axial direction, are formed on each dividing surface of the center support column piece, and the first fitting The part is configured by inserting a first key having holes provided in the axial direction at the same intervals as the second and fourth parts into the first recess of the adjacent center support column piece, and Claim 1, wherein the joint portion is configured by radially inserting the second key into the second recess of the adjacent center support column piece and into the hole of the inserted first key. A central support column of the tokamak-type nuclear attraction device according to item 1. (3) Each of the center support column pieces has a first portion extending in the axial direction on one dividing surface, a convex portion extending in the axial direction on the other dividing surface, and a second portion extending in the radial direction on the second fitting portion. 2 recesses, the first fitting part is configured by fitting the first four parts of the adjacent center support column pieces and the convex part, and the second fitting part is configured by
The central support column for a tokamak-type nuclear fusion device according to claim 1, characterized in that a key is inserted into the second and fourth portions of the adjacent center support column pieces.