JPS623562B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention provides a torus-shaped nuclear fusion device that includes:
A plurality of coil conductors are arranged in a torus shape, and the first and second coil conductors are divided into upper and lower parts, and are bolted at the joint.
This relates to toroidal coils that are fastened together using pins or the like.

Generally, torus-shaped fusion devices are shown in Figures 1 and 2.
As shown in the figure, it is composed of a vacuum vessel 2, a plurality of toroidal coils 1, an air-core current transformer coil 3, a poloidal coil 4, and the like. Vacuum container 2
has a trapezoidal or circular donut shape in cross section, and the plasma 5 is confined therein by magnetic fields in the toroidal direction, poloidal direction, and perpendicular direction. Heating of the plasma 5 is performed by generating an induced voltage in the plasma 5 by an air-core current transformer coil 3 wound near the vacuum vessel 2, and by using a current generated by the induced voltage.

As can be seen from FIGS. 1 and 2, this nuclear fusion device is assembled with a toroidal coil 1, a vacuum vessel 2, and an air-core current transformer coil 3 interlaced with each other.
Note that 1A and 1B are joint parts of the toroidal coil 1 divided into upper and lower parts.

Therefore, when manufacturing the device, as shown in FIG. To divide into two,
It cannot be assembled unless one of these methods is used.

The conventional toroidal coil and the toroidal coil of the present invention also have a structure in which the former toroidal coil is divided into two parts.

The joint between the two halves of a conventional toroidal coil was as shown in FIG.

The toroidal coil 1 is constructed by winding a coil conductor 6 several turns. Reference numeral 11 denotes interlayer insulation, which is insulation means for insulating between the coil conductors 6. 1st
At the joint portion 1A of the second coil conductors 6a and 6b, both conductors 6a and 6b are collectively tightened using a tightening bolt 7 and a nut 8 to form an integrated toroidal coil 1. 6e is the joint part 1A
Through holes in the thickness direction of the conductors 6a and 6b, 9
1 is an insulating washer, and 10 is an insulating tube. Note that the tightening bolts 7,
An insulating tube 10, an insulating washer 9, and a nut 8 are used to tighten and connect them.

However, with the recent progress in nuclear fusion research, multiple toroidal coils 1 are aligned with the center axis P-
It became necessary to move the space closer to Q, and the space S shown in FIGS. 1 and 2 became extremely narrow. Furthermore, due to the increase in capacitance, the contact length of the conductor at the joint 1A has increased, so when assembling the coil, the contact length of the conductor at the joint 1A has increased.
It has become difficult to monitor the bonding state of A, especially when starting the bonding work, while monitoring the bonding state of the contact surface 12. For this reason, the joint portion 1A is subjected to excessive force during coil assembly, and the long contact surface 12
was rubbed and damaged, and the contact resistance at the contact surface 12 increased, causing burnout and the like.

Further, the interlayer insulation 11a has 11 on the conductor 6a side.
b is attached to the conductor 6b side, so during bonding work, for example, the insulation 111b is rubbed against the tip of the conductor 62a, and the insulation 111b is peeled off or worn out and damaged, causing insulation deterioration. .

This invention was made in order to eliminate the drawbacks of the conventional ones, and the first invention is to make the shape of the coil conductor at the joint part uneven and to form stepped parts on the outer and inner surfaces of the mating parts. By making the connecting part of this stepped part tapered and using it as a guide surface when assembling the upper and lower divided toroidal coil, assembly work is facilitated and unreasonable force is suppressed from being applied to the joint part during assembly work. The second invention aims to reduce damage to contact surfaces, and the second invention has the shape of the conductor joint part similar to the first invention, and an insulating means for insulating between adjacent conductors is fixed to the conductor. Therefore, it is an object of the present invention to provide a structure in which the insulating means does not peel off even if the conductors come into contact with each other.

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 4, 6c is a first coil conductor with a convex joint M at the tip, and interlayer insulation 11c.
An insulator, for example, a reinforced fiber plastic (hereinafter referred to as FRP) molded product, is used to surround each of the conductors 61c to 64c. Fifth
The figure is a sketch of FIG. 4. 6d is a second coil conductor with a concave joint F at the tip, and an FRP molded product similar to 11c is used for interlayer insulation 11d. FIG. 6 is a sketch of FIG. 4.

Such molded insulating products are coil conductors 61c to 64.
It is not necessary to enclose the entire parts F, 61d to 64d, and only the vicinity of the joints F and M are molded, and the other parts are insulated by taping (not shown).

A description will be given of how to assemble a two-part toroidal coil having such a joint structure.

For example, a contact surface 12 in which each coil conductor 6c having a convex joint M is dropped downward from above toward the coil conductor 6d having a concave joint F as shown in FIG. Since the concave shape and the tapered surface T of the stepped part are combined as a guide surface,
Unlike conventional structures, there is less damage such as galling.

Furthermore, at the tip of the convex joint M, the corner R is the fourth
As shown in the figure, since the convex joint M is shaved and chamfered, the convex joint M fits into the concave joint very smoothly.

Further, since the interlayer insulations 11c and 11d are fixed to the coil conductors 6c and 6d, the interlayer insulation 11c and 11d are fixed to the coil conductors 6c and 6d.
By setting the thickness of 1c and 11d and the pitch between each adjacent coil conductor to appropriate values, interlayer insulation 11c and 11d can be easily formed during the bonding process.
d does not come into contact with the adjacent coil conductor, and even if it does, the interlayer insulation 11c, 11d
will not peel off.

The thus assembled joints F and M are tightened with bolts 7 to rigidly assemble the joints F and M.

As described above, according to the first invention, since the conductor shape of the joint structure has an uneven structure, it is possible to reduce damage to the contact surface of the conductor when assembling the joint. According to this method, since the conductor of the joint structure has an uneven structure and the insulating means is fixed to the conductor, in addition to the effect of the first invention, the effect of completely eliminating damage to the insulating means during assembly can be obtained.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a torus-shaped fusion device equipped with a toroidal coil having a conventional joint structure.
FIG. 2 is a plan view of the same as above, FIG. 3 is a diagram showing a conventional toroidal coil joint, FIG. 4 is a diagram showing a toroidal coil joint according to the present invention, and FIGS.
The figure is a sketch. In the figure, 1 is a toroidal coil, 6 is a coil conductor, 6a, 6c are first coil conductors, 6b,
6d is the second coil conductor, F is the concave joint, M is the convex joint, 7 is the insulating bolt, 11a, 11b,
11c and 11d indicate interlayer insulation. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] 1. A plurality of first
and a second coil conductor, a convex joint portion provided on the outer surface of the end of the first coil conductor and having a stepped portion with a connecting portion formed in a tapered shape, and an end portion of the second coil conductor. A toroidal coil comprising: a concave joint that is fitted with the convex joint and has an inner surface that makes sliding contact with the outer surface of the convex joint. 2. The toroidal coil according to claim 1, wherein the inner surface of the concave joint portion slides over substantially the entire surface of the convex joint portion. 3. A plurality of first
and a second coil conductor, a convex joint portion provided on the outer surface of the end of the first coil conductor and having a stepped portion with a connecting portion formed in a tapered shape, and an end portion of the second coil conductor. a concave joint that is provided and has an inner surface that slides into contact with the outer surface of the convex joint, and that fits into the convex joint, and is fixed to the outer surfaces of the first coil conductor and the second coil conductor; A toroidal coil equipped with insulation means to insulate adjacent coil conductors. 4. The toroidal coil according to claim 3, wherein the insulating means is fixed to every other coil conductor among the adjacent coil conductors. 5. The toroidal coil according to claim 3, wherein the convex joint portion has a chamfered end thereof.