JPH0326529B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an inner tank support device for a superconducting magnet applied to, for example, a superconducting magnetically levitated vehicle.

[Technical background of the invention and its problems]

Currently, superconducting magnetic levitation vehicles are being developed as a future means of transportation. The superconducting magnet used in this superconducting magnetic levitation vehicle has a structure in which an inner tank containing a superconducting coil is supported within an outer tank, which is a vacuum container.The inner tank is stored at an extremely low temperature with liquid helium. It receives a large acting force that causes the vehicle to float.

Incidentally, a multi-cylindrical narrow system is known as one of the structures for supporting such an inner tank, and this structure has conventionally been constructed as shown in FIG.

That is, 1 is an outer tank installed with one side plate 1a facing the ground coil 2, and inside this outer tank 1, an inner tank 4 storing the superconducting coil 3 is provided with a pair of folded support cylinder groups (folded support cylinders). It is supported in a narrowed state from the ground side and the opposite side by cylinders 5a and 5b. That is, a support seat 6 is provided on the side of the inner tank 4, and this support seat 6
A pair of support cylinders (support cylinders) 7a and 7b having high strength and good thermal insulation are squeezed in from the ground side and the opposite side. Furthermore, a pair of high-strength support cylinders (support cylinders) 8a, 8b made of stainless steel or the like are respectively fitted into the other ends of the pair of support cylinders 7a, 7b, and furthermore, the pair of support cylinders 8a,
8b is a pair of support cylinders (support cylinders) made of FRP etc.
It is narrowed by 9a and 9b. Furthermore, both ends of the pair of support cylinders 9a and 9b are connected to the fastening rod 10.
The flange 11 is integrally provided at one end of the flange 11 and the threaded spacer 12 is screwed onto the other end. Note that 13 is a spacer.

Further, the flange 11 of the fastening rod 10 and the flange 14, which also serves to prevent the spacer 12 from rotating, are welded to both side plates 1a and 1b of the outer tank 1,
Thereby, the airtightness of the outer tank 1 is maintained and the force from the inner tank 4 is transmitted to the outer tank 1 here.

Furthermore, the pair of folded support cylinder groups 5a, 5
The respective intermediate support cylinders 8a, 8b of b
A pair of heat shield plates 15a and 15b are supported respectively on the inner tank 4 and function as thermal anchors for the intermediate support cylinders 8a and 8b.
A heat shield is provided between the outer tank 1 and the outer tank 1. In addition, these heat shield plates 15a, 15
Cooling pipes 16a and 16b are attached to b, respectively.

Here, when a superconducting magnet is mounted on a vehicle and used, it is generally required to reduce the weight, so the outer tank 1 and the support cylinders 7a, 7b, 8a, 8b, 9
Efforts have been made, such as using aluminum materials for a, 9b, etc., but if the distance between the superconducting coil 3 on the vehicle and the ground coil 2 is reduced, mutual electromagnetic force increases, so the required levitation force and propulsion force are reduced. The required magnetomotive force of the superconducting coil 3 to obtain the electromagnetic force such as
Great effects can be expected from optimizing the configuration.

However, in the above configuration, since the cooling pipes 16a and 16b are attached to each of the pair of heat shield plates 15a and 15b that are brought into contact as thermal anchors of the folded support cylinder groups 5a and 5b,
There is a limit to how short the distance between the outer tank 1 and the inner tank 4 can be. That is, since cooling pipes 16a and 16b are attached to the heat shield plates 15a and 15b connected to the intermediate support cylinders 8a and 8b, respectively, when considering the space for the pipe connections, etc. There is a limit to shortening the L dimension, and it has been difficult to shorten the distance between the inner tank 4 and the outer tank 1. Therefore, the superconducting coil 3 on the vehicle
There was a problem in that the distance between the superconducting magnet and the ground coil 2 could not be made small, and the superconducting magnet became large and heavy.

[Purpose of the invention]

The present invention has been made based on the above-mentioned circumstances, and an object thereof is to provide an inner tank support device for a superconducting magnet that allows a superconducting coil to be made smaller and lighter.

[Summary of the invention]

In order to achieve the above object, the present invention provides an integral structure for each middle support tube of a pair of folded support tube groups, and provides a heat shield for a pair of heat shield plates on the side opposite to the ground side. By attaching the cooling piping only to the plate, the cooling piping on the ground coil side is eliminated and the distance between the superconducting coil and the ground coil is reduced.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG. Note that the same portions in FIG. 1 as those in FIG. 2 are designated by the same reference numerals, and a description thereof will be omitted.

That is, each intermediate support cylinder (support cylinder) 8a, 8b of the pair of folded support cylinder groups (folded support cylinder group) 5a, 5b is made of a material with good thermal conductivity, such as aluminum material. The intermediate support cylinder 20 has an integral structure. That is, this intermediate support cylinder 2
0 includes a cylindrical body 20a, a support seat 20b integrally provided at the center of the cylindrical body 20a, a support seat 20b integrally provided at the ground side end of the cylindrical body 20a, and a support seat 20b integrally provided at the end of the support cylinder 7a. Fitting flange part 2
0c, and a flange portion 20e that is screwed to the end of the cylindrical body 20a opposite to the ground side via a threaded portion 20d and fitted to the end of the support cylinder 7b, and By tightening the flange portion 20e to the cylindrical body 20a, the support cylinder 7a,
7b is narrowed and fixed by the flange portions 20c and 20e, and the support seat 20b is attached to the support cylinders 9a and 20e.
It is now narrowed at 9b. Furthermore, heat shield plates 15a and 15b are attached to the flange portions 20c and 20e of the intermediate support cylinder 20, respectively, and these heat shield plates 15a and 15b
Cooling pipes 16b are attached only to the heat shield plate 15b on the side opposite to the ground side, and no cooling pipes are attached to the heat shield plate 15a on the ground side. Therefore, the heat shield plate 15a on the ground side is
Cooling is achieved by heat conduction through the intermediate support cylinder 20 connected to the heat shield plate 15b on the side opposite to the ground side where the cooling pipe 16b is attached.

According to the above configuration, the ground side heat shield plate 1
Since no cooling pipe is attached to 5a, the distance between the heat shield plate 15a and the outer tank 1, that is, the dimension L in the figure, can be reduced, and thereby the distance between the inner tank 4 and the outer tank 1 can be reduced. Can be made smaller.
Therefore, since the distance between the superconducting coil 3 on the vehicle and the ground coil 2 can be reduced, it is possible to reduce the required magnetomotive force of the superconducting coil 3, thereby reducing the size and weight of the superconducting magnet. I can figure it out. Furthermore, if the distance between the ground coil 2 and the ground coil 2 can be reduced, the power required for the ground coil 2 can also be reduced, and thereby power saving can be achieved. Furthermore, since the number of pipe connections within the outer tank 1, which is a vacuum tank, can be reduced, reliability can be improved.

In the above embodiment, the fastening rod 10 and the flange 14 are connected to the outer tank 1, and the support seat 6 is connected to the cryogenic inner tank 4.
However, in the present invention, on the contrary, the fastening rod 10 and the flange 14 are connected to the inner tank 4 which is on the cryogenic side, and the support seat 6 is connected to the outer tank 1 which is on the normal temperature side.
It may also be configured to be provided on a beam or the like.

Further, in the above embodiment, the folded support cylinder group 5a,
5b has been described as having a three-layer structure, the present invention is not limited to this. For example, the same effect can be obtained even with a five-layer structure if the intermediate support cylinder that takes the thermal anchor is made into an integral structure. . Moreover, the heat shield plate has a temperature level of 2, for example 80K.
Even if it has a layered structure, the same effect can be obtained if the intermediate support cylinder that takes each thermal anchor is made into an integral structure.

〔Effect of the invention〕

As explained above, according to the present invention, each intermediate support tube of a pair of folded support tube groups has an integral structure, and the heat shield plate of the pair of heat shield plates on the side opposite to the ground side Because the cooling piping is installed only on the ground coil and the cooling piping on the ground coil side is eliminated, it is possible to reduce the distance between the superconducting coil and the ground coil, which makes it possible to make the superconducting coil smaller and lighter. It has excellent effects.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing one embodiment of the present invention, and FIG.
The figure is a sectional view showing a conventional example. 2... Ground coil, 1... Outer tank, 3... Superconducting coil, 4... Inner tank, 5a, 5b... Folded support cylinder group (folded support cylinder group), 7a, 7b, 8a,
8b, 9a, 9b...support cylinder (support cylinder), 20
...Intermediate support cylinder (intermediate support cylinder), 15a, 15
b...Heat shield plate, 16b...Cooling piping.

Claims (1)

[Claims] 1. An outer tank installed with one side plate facing the ground coil, an inner tank storing the superconducting coil, and the above-mentioned structure with this inner tank narrowed from the ground side and the opposite side. A pair of folded support tube groups supported in an outer tank, and a pair supported by respective middle support tubes of the pair of folded support tube groups, and heat shielded between the inner tank and the outer tank. and a heat shield plate, in which each of the intermediate support tubes connected to the heat shield plate of the pair of folded support tube groups has an integral structure, and one of the pair of folded support tubes above the ground An inner tank support device for a superconducting magnet characterized in that cooling piping is attached only to the heat shield plate on the opposite side. 2. The inner tank support device for a superconducting magnet according to claim 1, wherein the intermediate support tube connected to the heat shield plate is made of a material with good thermal conductivity.