JPS6244630B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a support structure for a helical coil in a toroidal fusion device such as a heliotron type or a stellarator type.

Conventionally, this type of helical coil is roughly divided into coils installed inside the vacuum container, that is, in a vacuum, and coils installed outside the vacuum container, that is, in the atmosphere. was supporting.

Among them, as a coil support structure installed in a vacuum, for example, as described in Japanese Patent Publication No. 48-24597, a high-tension non-magnetic rod-shaped coil support is used to reduce the coil's own weight and electromagnetic force from an annular support provided around the coil. We are supporting the. Furthermore, as a support structure for a coil installed in the atmosphere, a vacuum container and a helical coil are integrated to support the coil's own weight and electromagnetic force, as disclosed in Japanese Patent Application Laid-Open No. 52-114891.

When installed in a vacuum, the support rigidity of the coil is determined by the dimensions and number of the annular support and rod-shaped coil support.

On the other hand, the support rigidity when installed in the atmosphere is determined by the structure of the vacuum container itself, such as the rigidity of the container with spiral grooves, the filler material between the container and the coil, and the bridge material between the walls. Furthermore, it is easy to think that the coil support structure shown in Japanese Patent Publication No. 48-24597, that is, support for its own weight and electromagnetic force, can also be applied when a helical coil is installed in the atmosphere.

Conventional helical coil support devices are constructed as described above, but it is now applicable to electromagnetic force support when the shape of the vacuum vessel does not necessarily have a helical groove, and instead has a simple circular shape. Recently, with the increase in the size of equipment and the use of large currents, strong electromagnetic force is generated, which cannot be supported by the conventional structure of rod-shaped coil supports. .

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and by providing a non-magnetic coil support material with a curved surface along the outer circumferential surface of the helical coil and firmly tying the coil to this support material. It is an object of the present invention to provide a helical coil support device that supports a strong electromagnetic force and has accurate coil dimensional accuracy.

An embodiment of the present invention will be described below with reference to the drawings. Figure 1 is a plan view of the helical coil and vacuum vessel of a heliotron or stellarator type fusion device.
FIG. 2 is a sectional view taken along the line - in FIG. 1, and FIGS. 3 and 4 are detailed views showing the invention.

In the figure, the helical coil 2 has several conductors wound around the vacuum vessel 1 several times in the torus direction by connecting them in parallel or in series. As shown in FIGS. 3 and 4, it is firmly tied up and supported by a support 3 provided thereon with a tie string 8.

The support member 3 is made of a non-magnetic material, such as stainless steel (SUS material), and has a surface along the outer circumference of the helical coil 2, and has a plurality of holes 9 for tightly tying the coil 2 with a tie string 8. There is. Further, the support material 3 is divided into small pieces in the direction of the small circle and the direction of the large circle of the torus in order to reduce interference with a boat (not shown) of the vacuum vessel 1 and eddy current flowing through the support material. The hole 9 for the tie string should be aligned with the winding shape of the helical coil, facing towards the center of the small circle.
A sufficient number of coil conductors are provided on the support 3 to separate the coil conductors.

Hereinafter, support for the coil will be explained in the order of assembly. The vacuum container 1 and the helical coil 2 are assembled using special jigs and tools for combination (not shown) and temporarily placed independently of each other. Next, the helical coil support member 3 is temporarily placed on the helical coil 2 using jigs and tools. In this state, as shown in FIG.
Stronger tie strings such as glass roving material 8
Then, as shown in Fig. 4, filling material such as epoxy resin is filled between the coil conductors and in the hole 9 to firmly fix the coil 2 and the support material 3 to support the electromagnetic force applied to the helical coil 2. The insulating material 6 is used to maintain electrical insulation between the supporting material 3 and the coil 2, and has holes 9 similar to those of the supporting material 3.

After the supporting members 3 and the coils 2 are firmly set together in this way, the supporting members 3 are arranged at equal pitches in the torus direction and are firmly fixed by the mounting bolts 5 and the frame 4 which is divided into two parts in the vertical direction. be done.

In order to maintain the coil position accurately, a dowel pin or the like is used between the pedestal 4 and the support member 3 to accurately position the vacuum vessel.The weight of the vacuum container is supported separately from the pedestal 4 (not shown).

In the above embodiment, the coil supporting material 3 is made of a non-magnetic material such as SUS material, but a molded product of a highly rigid electrical insulator and non-metallic material such as FRP may also be used.

As described above, according to the present invention, the helical coil is wound helically along the outer periphery of the vacuum container, and the helical coil has a curved surface along the outer periphery of the helical coil. and a tie string that ties the helical coil to the support material through a hole penetrating the support material, and a filling material is filled between the conductors of the helical coil and in the hole. According to
It is possible to provide a helical coil support device that can support a strong electromagnetic force and accurately maintain the dimensional accuracy of the coil.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the vacuum vessel and helical coil portion of a torus-shaped fusion device, and Fig. 2 is a sectional view taken along the line - in Fig. 1, showing the case where one embodiment of the present invention is applied. . FIG. 3 is a perspective view showing an assembled state of the supporting member constituting the main part of the present invention, and FIG. 4 is a sectional view taken along the line - in FIG. 3. In the figure, 1 is a vacuum vessel, 2 is a helical coil, and 3
8 is a support material, 8 is a tie string, 9 is a hole, and 10 is a filler material. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1 A helical coil wound in a helical shape along the outer periphery of a vacuum container, and a curved surface along the outer periphery of the helical coil, arranged along the outer periphery of the helical coil, and including the helical coil. a supporting material having a plurality of through holes provided at positions corresponding to the respective conductors forming the helical coil; a tie string that individually ties the conductors forming the helical coil to the supporting material through the through holes; A support device for a helical coil, comprising a filler filled between the conductors of the coil and in the through hole.