JPS63244720A - Superconducting magnet device - Google Patents

Abstract

PURPOSE:To render a supporting structure of inner vessel more stable so that no supporting cylinders made of synthetic resin change each shape very much after exceeding its elastic limit even through an abnormal load is applied, by causing inner or outer circumferences of either one at least among synthetic or metallic supporting cylinders to form supporting protrusions. CONSTITUTION:Supporting protrusions 20 and 21 are formed at an outer circumference of a center side end part of metallic supporting cylinders 7 and 11 in a load supporting device 3 and gaps delta1 and delta2 provided at the supporting protrusions 20 and 21 are installed so that their gaps are narrower than widths of heat insulation spaces. When a superconducting magnet device is used for a superconducting magnetic levitation system railway, its emergency stop that is performed while running allows an inner vessel 2 to be applied by a load in the direction of core slippage and when respective supporting cylinders 5-14 receive a bending load, the deformation due to core slippage caused by the synthetic resin supporting cylinders 5, 6, 9, 10, 13 and 14 makes the supporting protrusions 20 and 21 mounted at metallic supporting cylinders 7 and 11 move and come in contact with supporting connections 4 which are facing through gaps delta1 and delta2 or a metallic supporting cylinder 8 and then this approach prevents the deformation due to core slippage. Accordingly, no over-deformation develops in the synthetic resin supporting cylinders 5, 6, 9, 10, 13, and 14 and such a state keeps the above cylinders from being damaged.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention relates to a superconducting magnet device, and particularly to a superconducting magnet device that is equipped with a load supporting structure that can safely support an inner tank when an abnormal load occurs. The present invention relates to a superconducting magnet device.

(Prior Art) Generally, in a superconducting magnet device, in order to maintain the superconducting coil in a superconducting state, an inner tank containing the superconducting coil is filled with a cryogen such as liquid helium to cool the superconducting coil. In order to reduce the amount of heat that enters the inner tank from the outside, the inner tank for storing liquid helium is housed in an outer tank with a vacuum inside, so it has a double structure.

Therefore, the structure that supports the load of the inner tank relative to the outer tank is required to have very good heat insulation properties. At the same time, when installing this superconducting magnet device on a vehicle running at high speed, such as a superconducting magnetic levitation railway,
It must have sufficient strength and structure to withstand the vibrations and shocks that occur during driving.

As a superconducting coil that can meet such technical problems, there has been known a superconducting coil equipped with a multi-cylindrical sandwiching type load support structure as described in Japanese Patent Application Laid-open No. 16678/1983.

An example of a superconducting magnet device having such a conventional multi-cylindrical sandwich type load support structure is shown in FIG. This conventional superconducting magnet device has an outer tank 1 whose interior is kept in a vacuum state, and an inner tank 2 in which superconducting coils are housed. 2 is supported with respect to the outer tank 1. This load support device 3 uses support cylinders 5 and 6 made of synthetic resin with high strength and excellent heat insulation properties such as FRP to support the inner periphery of a ring-shaped support seat 4 provided on the inner peripheral wall of the inner tank 2. High-strength metal supports n7 and 8, such as stainless steel, are fitted into each end of these synthetic resin support tubes 5 and 6. Furthermore, on the inside, support tubes 9 and 10 made of synthetic resin such as FRP, support tubes 11 and 12 made of lightweight and strong metal such as aluminum, and support tubes 13 and 14 made of synthetic resin such as FRP are arranged concentrically in order. It is inserted into the shape.

Then, by tightening both ends of this innermost synthetic resin support cylinder 13° 14 with a fastening rod 16 with a 7-flange 15 and a screw fitting 18 with a flange 17, all the support cylinders 5 to 14 are integrated. ing.

Flange 15 of fastening rod 16, flange 1 of screw fitting 18
7 are respectively welded to the outer tank 1 to maintain the airtightness of the outer tank 11 and to transmit the loads of the inner tank 2 and the load support device 3 to the outer tank 1 here.

Load support using this type of multi-cylindrical sandwiching method! ! Place 3
In the case of a superconducting magnet device having a structure in which the inner tank 2 is supported with respect to the outer MJ1, the space formed by each support cylinder 5 to 14 becomes a heat insulating layer, and the inner tank 2 containing liquid helium as a cryogen is It is possible to support the outer tank 1 while maintaining high thermal insulation. In addition, 19 is an aj radiation heat shield plate for reflecting the invasion of side radiation heat into the inner tank 2.

(Problem to be solved by the invention) However, such a conventional superconducting coil "11t"
', the load support device 3 of the inner tank 2 has very good strength and rigidity in the axial direction, but the rigidity in the bending direction is about 1/4 to 115 of that in the axial direction. We only have the following. Therefore, especially when this superconducting magnet device is installed on a vehicle, such as in a superconducting magnetic levitation railway, not only the normal running load but also the load in abnormal situations, that is, the load when the vehicle stops in an emergency, are taken into account. There is a need.

Although this load during an emergency stop is applied for a very short time, stainless steel or other metal support tubes will not undergo plastic deformation even if the deformation 1 exceeds the elastic limit. However, there is a problem in that support tubes made of non-metal or synthetic resin such as FRP may break and may no longer function as a load support.

This invention was made to solve these conventional problems, and even when an abnormal load is applied, the synthetic resin support tube will not be significantly deformed beyond its elastic limit, and the inner tank will remain stable. An object of the present invention is to provide a superconducting magnet device that can stably support a magnet.

[Structure of the Invention] (Means for Solving the Problems) The superconducting magnet device of the present invention has an inner tank with respect to an outer tank, and a synthetic resin support tube and a metal support tube are arranged concentrically alternately. It is supported by a multi-cylindrical sandwich type load support device, which is constructed by arranging multiple cylinders, and a support protrusion is formed on the inner or outer periphery of at least one of the synthetic resin support tube or the metal support tube to prevent abnormalities. When a load is applied, the synthetic resin support tube comes into contact with the adjacent metal support tubes to prevent excessive deformation.

(Function) In the superconducting magnet device of the present invention, a load supporting device composed of a synthetic resin support cylinder and a metal support cylinder supports the inner tank adiabatically with respect to the outer tank. If the synthetic resin support tube is deformed due to an abnormal load, the support protrusion may cause the synthetic resin support tube to come into contact with the adjacent inner or outer metal support tube, causing excessive misalignment. prevents deformation,
It is possible to prevent destruction due to excessive deformation and provide stable support for the inner tank.

(Example) Hereinafter, an example of the present invention will be explained in detail based on the drawings. FIG. 1 shows an embodiment of the invention.

A sub-side heat shield plate 1 is placed inside the outer tank 1 whose interior is kept in a vacuum.
Inner MJ2 is accommodated through 9. A support seat 4 provided on the inner peripheral wall of the inner tank 2 is connected to a fastening rod 16 by a load support device 3, and the load of the inner tank 2 is supported by the outer tank 1 by the fastening rod 16. .

The structure of the load support device 3 is approximately the same as that of the conventional example, and the FR
The support seat 4 is sandwiched between synthetic resin support cylinders 5 and 6, such as P, which have relatively high rigidity and excellent thermal insulation properties, and the ends of these synthetic resin support cylinders 5 and 6 have a strength similar to that of stainless steel. The end of the high metal support cylinder 7°8 is fitted. The inner ends of the metal support tubes 7 and 8 are connected to the support tubes 8 and 1 made of synthetic resin such as FRP, which are disposed further inside.
0, and further a metal support tube 11゜1
2.Synthetic resin support tubes 13 and 14 are fitted in order.

A feature of this embodiment is that a support protrusion 20.
21 is formed, and a gap δ1 . δ2 is set narrower than the width of the heat insulating space. Under normal load conditions, this gap δ1, 62 does not come into contact with the opposing support seat 4 and metal support cylinder 8, and can maintain heat insulation properties.Moreover, under abnormal loads, the synthetic resin support cylinder 5. .9.10, etc., should be large enough to come into contact with the metal support tubes 7, 8, 11, 12, etc. to prevent the deformation from becoming large enough to cause destruction. It is.

The operation of the superconducting magnet device having the above configuration will be explained next. The inside of the outer tank 1 is kept in a vacuum state, and the inside of the inner tank 2 is filled with liquid helium as a cryogen, and the superconducting coil is housed therein. The secondary heat shield plate 19 shields secondary heat that enters through the outer tank 1 and prevents secondary heat from being transferred to the inner tank 2.

The load support device 3 supports the inner tank 2 with a support seat 4,
The load from the inner tank 2 applied to this support seat 4 is
4 to the central fastening rod 16, and is supported by the outer tank 1 by this fastening rod 16.

In addition, the spaces formed by the support cylinders 5 to 14 of the load support device 3 become heat insulating spaces, and the transfer of heat transmitted from the outer tank 1 through the fastening rods 16 and screw fittings 18 can be minimized. .

When this superconducting magnet device is used in a superconducting magnetic levitation railway, a load in the direction of misalignment is applied to the inner tank 2 due to an emergency stop during running, and each support tube 5 to 14 receives a bending load. , synthetic resin support tube 5, 6, 9.10.13
．． Due to the misalignment deformation caused by 14, the metal support tubes 7 and 11
The supporting protrusions 20.21 provided in the gap δ are moved.
1. It comes into contact with the opposing support seat 4 and metal support cylinder 8 via δ2, thereby suppressing misalignment deformation. As a result, the synthetic resin support cylinders 5, 6.9, 10, 13, 14 do not undergo excessive deformation and can be prevented from breaking.

Note that contact between the inner and outer support tubes will impair the insulation properties of the load support device 3, but such contact between the inner and outer support tubes will occur for a short period of time when an abnormal load is applied. Therefore, there is no risk that the loss of heat insulation will have a major effect on the inner tank 3.

Therefore, the inner tank 2 can be stably supported with sufficient strength by the load support device 3 while maintaining its heat insulation properties.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and for example, the number of synthetic resin support cylinders of the load support device can be increased or decreased as necessary.

In addition, in the case of the above embodiment, a support protrusion was formed at the center end of the metal support tube to prevent misalignment deformation of the synthetic resin support tube. They may be provided on the side of the resin support cylinder, and may be provided not only at one location but also at multiple locations in the axial direction, and the location and number of locations are not particularly limited.

[Effects of the Invention] As described above, according to the present invention, the inner tank can be thermally insulated from the outer tank by the load supporting device consisting of the synthetic resin support tube and the metal support tube provided in the center of the inner tank. can be supported. In addition, support protrusions are provided on the inside or outside of at least one of the metal support tubes and the synthetic resin support tubes, which are alternately arranged concentrically, forming a gap narrower than the gap in a normal heat insulation space. Therefore, if the synthetic resin support tube is deformed due to an abnormal load, the support protrusion can contact the adjacent metal support tube, increasing the overall rigidity. Excessive deformation that could lead to destruction of the cylinder does not occur, and the inner tank can be stably supported.

In addition, since the load burden when the synthetic resin support tube deforms out of alignment is shared with the metal support tube, the wall thickness is increased to improve the strength against the misalignment deformation of the synthetic resin support tube. There is no need to consider the increase, and the weight of the load supporting device can be reduced. .

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional example. 1...Outer tank 2...Inner tank 3...Load support device 5.6...Synthetic resin support tube 7.8...Metal support tube 9.10...Synthetic resin support Cylinder 11.12... Metal support tube 13.14... Synthetic resin support tube 16... Fastening rod 20.21... Support protrusion δ1. δ2...gap

Claims (1)

[Claims] A ring-shaped inner tank containing a superconducting coil is housed in an outer tank, and a synthetic resin support cylinder with excellent thermal insulation and a strong metal support cylinder are arranged alternately in the center of the inner tank. The inner peripheral wall of the inner tank is supported by a support ring member with respect to the outermost support cylinder, and the inner peripheral wall of the inner tank is supported by a support ring member, The inner or outer periphery of at least one of the synthetic resin support tube and the metal support tube comes into contact with the adjacent inner and outer metal support tubes when the synthetic resin support tube causes misalignment deformation due to an abnormal load. A superconducting magnet device comprising a supporting protrusion for preventing excessive deformation of the superconducting magnet device.