JPS6356511B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a toroidal coil support device for a torus-type nuclear fusion device, and particularly to a toroidal coil support device for a torus-type nuclear fusion device that supports a toroidal coil by interposing an anti-torque beam between a plurality of toroidal coils. Regarding equipment.

Figure 1 shows the schematic configuration of a torus-type fusion device. In the figure, the vacuum container 2 has a vacuum inside,
A large number of toroidal coils 3 are radially arranged at predetermined intervals in the circumferential direction of the torus for the purpose of applying a magnetic field for confining the plasma 1 around the toroidal coil. A plurality of poloidal coils 4 are arranged along the vacuum vessel 2 for the purpose of generating and maintaining plasma current and positioning the plasma 1.

By the way, electromagnetic force is generated by energizing the toroidal coil 3, and this generated electromagnetic force includes centripetal force toward the center of the device and overturning force generated by the interaction with the poloidal coil 4. The overturning force is a force acting in a direction that causes the toroidal coil 3 to overturn in a vertically symmetrical manner with respect to the center cross section of the toroidal coil 3. In the conventional torus-type fusion device, the centripetal force mentioned above is supported by a cylinder installed at the center of the device, while the overturning force is supported by the outer frame 3 surrounding the toroidal coil 3, as shown in FIG.
It is considered to be supported by an anti-torque beam 5 attached to a.

A conventional toroidal coil support structure against overturning force is shown in FIG. 3. The conventional anti-torque beam 5 is interposed between the toroidal coils 3 after the toroidal coils 3 are assembled, and both ends thereof are fixed to the outer frame 3a of the toroidal coil 3 with bolts 6. The overturning force is transmitted to the anti-torque beam 5 via this bolt 6 and supported by the rigidity of the anti-torque beam 5. At that time, a huge bending moment will be applied to the joint surface between the two, but the bolt 6 requires a certain amount of space when tightening or loosening.
Since the interposed anti-torque beam 5 is tightened and loosened with the toroidal coil 3 installed, the work space is very small. Furthermore, the number of devices is also limited due to the workability when disassembling and assembling the device. Therefore, with the conventional support device that connects and supports the toroidal coil 3 and anti-torque beam 5 during the final assembly of the fusion device, it is not possible to tighten the connecting surfaces of the two, and it is not possible to create a sufficiently strong structure. However, it has the disadvantage of poor reliability.

The present invention has been made in view of the above points, and its purpose is to provide a strong connection while maintaining disassembly and assembly performance even when supporting a toroidal coil via an anti-torque beam. An object of the present invention is to provide a toroidal coil support device for a torus type nuclear fusion device with improved reliability.

The present invention provides an anti-torque beam that is provided between a plurality of toroidal coils arranged radially around an annular vacuum vessel at predetermined intervals in the circumferential direction of the torus, and that connects adjacent toroidal coils. In addition to being split at the center, the divided anti-torque beams are fixed to the toroidal coils before assembly, and during assembly, the engaging parts of the anti-torque beams are placed approximately in the middle of two adjacent toroidal coils. It was designed to achieve the intended purpose by providing this.

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. 4 shows an embodiment of the toroidal coil support device of the present invention. As shown in the figure, in this embodiment, the anti-torque beam 5, which is arranged between the toroidal coils 3 and connects the adjacent toroidal coils 3, is divided into two in the circumferential direction of the torus, and the toroidal coil 3 is divided into two parts before the toroidal coil 3 is installed. outer frame 3a of
It is integrated by welding etc. Furthermore, a square groove 7 is provided on the divided surface of the anti-torque beam 5, which faces the center of the torus. A T-shaped groove 8 is provided at a certain location. When another divided anti-torque beam 5 whose divided surface has a similar shape is welded or otherwise engaged with the outer frame 3a of the adjacent toroidal coil 3, the divided surface of the anti-torque beam 5 is A square key 9 is inserted into the square groove 7 in the direction of the torus center as shown by the arrow so as to straddle both of the divided anti-torque beams 5.
When the divided anti-torque beams 5 are placed facing each other, the shaped groove 8 is formed into an H shape. Insert it like
The divided anti-torque beams 5 are engaged with each other to support the toroidal coil 3.
Moreover, in this embodiment, the engaging portions are engaged so that they are located approximately in the middle between adjacent toroidal coils 3. In addition, when inserting the square key 9 and the H-shaped key 10 into their respective grooves, first insert the square key 9, then divide the H-shaped key 10 and insert it from both the top and bottom, or
This can be done by providing a through hole in the middle of the key 10 that is large enough for the square key 9 to pass through, inserting the H-shaped key 10, and then inserting the square key through the groove and the through hole.

By having the configuration of this embodiment as described above,
Since the toroidal coil 3 and the anti-torque beam 5 are fixed in advance before being incorporated into the device, unlike the case where the anti-torque beam 5 is fixed after the toroidal coil 3 is incorporated, it is necessary to consider the work space, etc. Therefore, the work of connecting the toroidal coil 3 and the divided anti-torque beam 5 can be sufficiently performed, and the connection can be firmly performed. Moreover, since the divided anti-torque beam 5 is engaged at the central portion where a relatively small force is applied, no particular stress problem occurs in the divided central portion. Further, since this embodiment uses a key-based coupling method, disassembly and assembly can be performed simply by inserting and removing the key.

Next, the effects of the embodiment of the present invention will be explained using FIG. 5.

This figure shows a case where a plurality of toroidal coils 3 are connected via an anti-torque beam 5 and a toppling force F is applied. Considering what kind of force acts inside the anti-torque beam 5 in this state, in the cross section A-A, which is the joint between the toroidal coil outer frame 3a and the anti-torque beam 5,
A bending moment M and a shear force τ act. Since this cross section is joined by welding, the structure is strong enough to withstand this bending moment. On the other hand, at the intermediate cross section B-B of the anti-torque beam 5, the bending moment becomes zero and only the shear force τ acts. The anti-torque beam 5 is divided into two parts at this cross section, and the shear force is supported by a rectangular key 9 inserted into the cross section. Further, in order to prevent the joint surfaces from shifting in the lateral direction and to prevent the joint surfaces from coming apart during an earthquake, H-shaped keys 10 are inserted in the vertical direction of the joint surfaces. With the structure described above, the strength is improved by welding in the parts where large forces are applied, and it is divided into parts where relatively small forces are applied, so it is different from the conventional bolt fastening method. It has the same function and is a strong support structure. Furthermore, since it uses a key-based connection method, it is easy to disassemble and assemble.

In this embodiment, the joint between the anti-torque beam 5 and the toroidal coil 3 is constructed by welding, but this part does not necessarily need to be welded.
It may be fixed using bolts or keys. The difference between this structure and the conventional one is that in this structure, the anti-torque beam 5 is attached to the toroidal coil 3 as a single item before assembly, so the anti-torque beam 5 and the toroidal coil 3 are sufficiently firmly connected, unlike the conventional structure. It is possible. As another example, when manufacturing the toroidal coil outer frame, the toroidal coil 3 may be finished in an integral shape including the anti-torque beam 5, thereby making it possible to support the toroidal coil 3 more firmly.

According to the toroidal coil support device of the torus type nuclear fusion device of the present invention described above, the toroidal coils are provided between a plurality of toroidal coils arranged radially around the annular vacuum vessel at predetermined intervals in the circumferential direction of the torus, The anti-torque beam that connects adjacent toroidal coils is divided approximately at the center in the circumferential direction of the torus, and the divided anti-torque beams are fixed to the toroidal coils before assembly, and the anti-torque beams are fixed to the toroidal coils during assembly. Since the engaging parts of the same kind are provided approximately in the middle of two adjacent toroidal coils, it is easy to disassemble and
It is possible to obtain a device of this type that is easy to assemble, can firmly support the toroidal coil, and has improved reliability.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view schematically showing a torus-type nuclear fusion device, Fig. 2 is a partial plan view showing a part of the device in cross-section, and Fig. 3 is a partially cross-sectional view showing how a conventional toroidal coil is supported. 4 is a schematic perspective view showing an embodiment of the toroidal coil support device of the present invention, and FIG. 5 is a front view showing a deformed state of the toroidal coil and anti-torque beam for explaining the effects of the present invention. It is. DESCRIPTION OF SYMBOLS 1... Plasma, 2... Vacuum vessel, 3... Toroidal coil, 3a... Outer frame, 4... Poloidal coil, 5... Anti-torque beam, 7... Square groove, 8... T-shaped groove, 9... ...Square key, 10...H
shape key.

Claims (1)

[Scope of Claims] 1. A large number of toroidal coils are arranged radially around an annular vacuum container at predetermined intervals in the circumferential direction of the torus, and these toroidal coils are provided with anti-torque coils arranged between adjacent toroidal coils. In a toroidal coil support device for a torus-type fusion device that is connected and held by a beam, the antitorque beam is divided approximately at the center in the circumferential direction of the torus, and the divided antitorque beam is separated before the toroidal coil is assembled. is fixed to the toroidal coil in advance, and when assembled, the engaging portion of the anti-torque beam is provided approximately in the middle of the adjacent toroidal coils. 2. Grooves directed toward the center of the torus are provided on both dividing surfaces of the anti-torque beam, and a key is inserted into the groove to span both of the divided anti-torque beams to engage the anti-torque beams. A toroidal coil support device for a torus-type nuclear fusion device according to claim 1. 3. On both dividing surfaces of the anti-torque beam,
A plurality of second grooves vertically orthogonal to the groove toward the center of the torus are provided at predetermined intervals in the direction of the center of the torus, and a key is provided so that the second grooves span both of the divided anti-torque beams. A toroidal coil support device for a torus-type nuclear fusion device according to claim 2, wherein a toroidal coil support device for a torus-type nuclear fusion device is inserted. 4. A groove facing the center of the torus is formed into a square shape, and a second groove orthogonal to this groove is formed into a T-shape, and when the divided anti-torque beam is engaged, the square grooves are formed into square shapes. key, T
4. The toroidal coil support device for a torus-type nuclear fusion device according to claim 3, wherein an H-shaped key is inserted into each of the second grooves so as to straddle both anti-torque beams.