JPS59132690A - Cryogenic supporting structure - Google Patents

Abstract

PURPOSE:To reduce the amount of heat permeation and thus enable to lighten and form compactly the structure by adopting a supporting structure of the combination of a sliding structure with a pin structure. CONSTITUTION:A bobbin 2 around which a superconductive coil 1 is wound is fixed to a pipe 6 by the supporting structure 7, and further supported by an inner bath 4 through the supporting structure consisting of the pipe 6 and a supporting part 5. The supporting part 5 is composed of bearings 8, a supporting rod 9, a pin 10, a pin hole 11 provided at the tip of the supporting rod 9, and a pin mounting part 12 fixed to the inner bath 4. The strain due to the electromagnetic force between the coils absorbed by the very small rotation of the pin rod 9 around the pin 10, which electromotive force is therefore not transmitted to the inner bath 4. Besides, welding strain and heat shrinkage strain are absorbed by this supporting structure, and thus the coil bobbin 2 and the inner bath 4 become independent with respect to strains of each other.

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to cryogenic support structures.

[Prior art and its problems]

Generally, the support structure of a superconducting coil used in a cryogenic region differs depending on the type of equipment to which the superconducting coil is applied, the design policy for application, etc. in the following two cases. One is that the electromagnetic force acting between the superconducting coils does not need to be transmitted outside the cryogenic temperature (normal temperature space), and the electromagnetic force is supported in the cryogenic region, and only the weight of the superconducting coil is supported.The other is, This is a case where the electromagnetic force acting on the superconducting coil (including the electromagnetic force between the superconducting coils and the electromagnetic force generated by the interaction between the superconducting coil and an externally applied magnetic field) and its own weight are transmitted to the cryogenic environment and supported.

The present invention is directed to the former case.

FIG. 1 shows a conventional embodiment. In this figure, a superconducting coil 1 is wound on a winding frame 2, leaks through a support structure 3, and is supported in an inner tank 4 of a cryogenic container. The support structure 3 and the winding frame 2 or the inner tank 4 are fixed with bolts 5.

Such conventional embodiments have the following problems. First, an electromagnetic force such as an attractive force or a repulsive force acts between the superconducting coils 1 . There is no problem if this electromagnetic force is supported only by the winding frame 2, but according to this embodiment, a part of the electromagnetic force is also shared by the inner tank 4 through the support structure 3, causing the inner tank 4 to become distorted.

Further, in the conventional embodiments, it is not possible to absorb stress caused by welding distortion caused during manufacture of the inner tank 4, heat shrinkage distortion during cooling from room temperature to extremely low temperature, etc. Therefore, in this embodiment, the winding frame 2, support structure 3, and inner tank 4 must have sufficient mechanical strength.

For this purpose, the wall thickness of the winding frame 2, support structure 2, and inner tank 4,
- The diameter and other shapes become larger, leading to increased weight and manufacturing costs. In particular, since the inner tank 4 surrounds the superconducting coil 1, the weight increases significantly due to the increased wall thickness. Also, inner tank 4
If the thickness is increased, the processing itself becomes difficult, which also increases the manufacturing cost.

[Purpose of the invention]

The present invention provides a support structure capable of absorbing the electromagnetic force distortion, welding distortion, and heat shrinkage distortion described in the conventional embodiment by a mechanical mechanism, thereby producing a lightweight, compact, and inexpensive superconducting electrode. Our goal is to provide low temperature equipment.

[Summary of the invention]

In order to absorb distortion caused by electromagnetic force, welding distortion, and heat shrinkage distortion, a support structure that combines a sliding structure and a pin structure is adopted.

〔Effect of the invention〕

It is possible to provide a superconducting cryogenic device that has a small amount of heat intrusion and is lightweight, compact, and inexpensive.

[Embodiments of the invention]

FIG. 3 shows an embodiment of the present invention. Similar to the conventional embodiment,
A superconducting coil 1 is inserted into a winding frame 2. The winding frame 2 is
It is fixed to the pipe (sliding base part) 6 by the support structure 7,
Furthermore, it is supported by the inner tank 4 through the support structure of the present invention consisting of a pipe (sliding base part) 6 and a support part 5. Details of the support structure of the present invention are shown in FIG. In this figure, the support part 5
consists of a bearing 8 (sliding part), a support rod 9, a pin 10, a pin hole 11 provided at the tip of the support rod 9, and a pin attachment portion 12 fixed to the inner tank 4.

In the present invention, distortion due to electromagnetic force between the coils is absorbed by minute rotation of pin rod 9 around pin 10, and this electromagnetic force is not transmitted to inner tank 4. Further, welding strain and heat shrinkage strain are also absorbed by the support structure of the present invention, and the coil winding frame 2 and inner tank 4 become independent with respect to each other's strain. Furthermore, it is possible to support the weight of the superconducting coil and the winding frame.

[Other embodiments of the invention]

FIG. 4 shows a second embodiment of the invention. in this case,
Inside the inner tank 4, a superconducting coil may be supported using the support structure according to the present invention, or cryogenic application equipment not including a superconducting coil may be housed. In the embodiment shown in FIG. 4, the heat shrinkage strain of the inner tank 4 is absorbed by the support structure of the present invention.

In the same figure, the inner tank 4 is fixed to a pipe (sliding base part) 6 through a support 13, and furthermore, the inner tank 4 is fixed to a pipe (sliding base part) 6 through a support 13, and is further heated to a cryogenic temperature through the support structure of the present invention, which is composed of the pipe (sliding base part) 6 of the present invention and a support part. It is supported by the container outer tank 14.

The fact that the heat shrinkage strain of the inner tank 4 is absorbed by this support structure is the same as that described in FIGS. 2 and 3 of the embodiment of the present invention.

Next, a third embodiment of the present invention is shown in FIG.

In this embodiment, the pin structure 10 in FIG. 3 is different from that in FIG. 4.
11 and 12 are installed on the $4 side of the cryogenic container. Furthermore, both ends of the pipe (sliding base part) 6 extend at 16 dimensions of the base of the outer tank leg part 15, and this pipe (sliding base part) 6
Therefore, the structure differs from that in which the weight of the inner tank 4 and the superconducting coils or cryogenic equipment other than the coils housed in the inner tank 4 can be supported.

The support structure shown in Figures 4 and 5 can not only absorb welding strain and thermal shrinkage strain, but also reduce heat intrusion from room temperature due to conduction because the cooling path from extremely low temperatures to room temperature is longer. As a result, the amount of evaporation of the refrigerant (for example, liquid helium) stored in the inner tank 4 also decreases. This effect is particularly remarkable in the support structure shown in FIG. Further, in the embodiment shown in FIG. 5, part or all of the pipe (sliding base portion) 6 can be used as a refrigerant injection pipe, an evaporated gas recovery pipe, a guide pipe for measurement lead wires, etc. In this case, the entire device becomes compact.

Further, embodiments of the present invention will be described in detail as follows.

(1) In the embodiment shown in FIG. 2, the pipe (sliding part) 6 may be fixed to the inner tank 4. , and the deviations are the same in the embodiment shown in FIG.

(2) In FIG. 3, the pin structure is made up of bolts and nuts, but any so-called pin structure that can be freely rotated around the -axis may be used.

(3) In FIG. 3, a bearing is used for the sliding portion 8, but any structure may be used as long as it can slide freely in one direction.

(4) In Figures 2 and 4, a vibro is used as the sliding base, but as described in item 3 above, any sliding base that is compatible with the sliding part 8 may be used. . Also, the pipe 6 does not have a particularly blue ring. It may be part of a ring.

As described above, the present invention can be modified and applied in various ways without departing from the gist thereof.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a conventional embodiment, Fig. 2 is a sectional view showing an embodiment according to the present invention, Fig. 3 is a sectional view showing details of an embodiment according to the present invention, and Fig. 4 is a sectional view showing the embodiment according to the present invention. FIG. 5 is a sectional view showing a modification of the present invention. DESCRIPTION OF SYMBOLS 1... Superconducting coil, 2... Coil winding frame, 3... Support structure, 4... Cryogenic container inner tank, 5... Support part. 6... Pipe (sliding base part), 7... Support structure, 8... Bearing (sliding part), 9... Support rod, 10... Bolt nut (pin), 11. ...Bolt hole (pin hole), 12... Pin attachment part, 13... Support structure, 14... Cryogenic container outer tank, 15... Cryogenic container outer tank leg, 16... Cryogenic container outer tank leg base. Representative Patent Attorney Norij Kensuke Kato (1 person) Figure 1 ta><b) L/:I Figure 2 (a)
(b) Figure 3 Special opening a59-132690 (4) Figure 5

Claims (5)

[Claims] (1) A sliding base part, a sliding part that can slide along this base part, and A cryogenic support structure, characterized in that the sliding part has a pin structure for rotating within a substantially vertical cross section of the base part. (2) A cryogenic support structure according to claim 1, characterized in that one or more superconducting coils are supported in an inner tank of a cryogenic container. (3) The cryogenic support structure according to claim 1, wherein one or more cryogenic container inner tanks are supported by a common cryogenic container outer tank. (4) The sliding part is located in the inner tank of the cryogenic container, and both ends or one end of the sliding base on which the sliding part is to be slid is located in the outer tank of the cryogenic container. Claim 3, characterized in that the inner tank and its contents are supported by their own weight by being fixed to the normal temperature base of the provided legs.
Cryogenic support structure mounted on the item M. (5) Part or all of the sliding base part is composed of a pipe,
Through this pipe, the refrigerant inside the chamber (e.g. liquid helium) or the refrigerant (e.g. liquid nitrogen or helium gas) in the radiation shield plate inserted between the inner chamber and the outer tank of the cryogenic container
Claim No. 1, characterized in that various cooling pipes such as an injection pipe, an evaporated gas recovery pipe, and a guide pipe for a needle-side lead wire are also used, or various cooling pipes are built into this pipe. The cryogenic support structure according to item 2 or 3.