JPH09153407A - Support structure of oxide superconducting current lead - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the support structure, which can absorb the heat shrinkage of an oxide superconducting conductor and vibrations from the side of a low- temperature container, of an oxide superconducting current lead, which feeds a current to a superconducting coil in the container and links a conductor made of copper to the oxide superconducting connductor. SOLUTION: This support structure consists of an oxide superconducting conductor 17, which is connected with a superconducting coil dipped in a liquid helium in a low-temperature container with a liquid nitrogen container 14 installed on the upper part thereof, and a metal conductor 22, which has a terminal 23 being coupled with an upper side terminal 18 of this conductor 17 and penetrates the container 14 to extend upward. At this time, with a current conduction bellows 20a provided between a flange-shaped flange plate 28, which is provided under the lower end of the conductor 22, and a metal conductor terminal 23, a bellows 21a for vibration absorption use is provided on the periphery of the conductor 22 between the plate 28 and a fixed frame 31 provided under the bottom of the container 10 over the plate 28.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current lead for connecting a power supply between a superconducting coil housed at a cryogenic temperature and an external power source placed at room temperature, and more particularly to a current lead using an oxide superconducting conductor. Regarding support structure.

[0002]

2. Description of the Related Art Generally, a superconducting coil serving as a superconducting magnet is cooled in a cooling medium (liquid helium). For this reason, the cryogenic container accommodating the superconducting coil is accommodated in a vacuum container which is cooled by liquid nitrogen from the surroundings and further insulated by a wall having a vacuum layer. The current lead supplies current to the superconducting coil cooled to cryogenic temperature in this cryogenic vessel from an external power supply installed at room temperature, so that heat penetration into the superconducting coil at cryogenic temperature is minimized. Things are desired. Therefore, development of a current lead using an oxide superconducting conductor having a low electric resistance and a low thermal conductivity at an extremely low temperature is under way.

FIG. 8 is a longitudinal sectional view showing a simplified general structure of a superconducting magnet device using an oxide superconducting current lead. In FIG. 8, the vacuum heat insulating container 1 is composed of a double container, the vacuum container 3 is arranged on the outer side, and the low temperature container 5 is arranged on the inner side thereof, and each of the vacuum container 3 and the low temperature container 5 is formed. Vacuum insulation layers 2a, 2b in the wall
Are formed. The vacuum container 3 and the cryogenic container 5 have a cryogenic container cover 15 made of a flange protruding outward from the upper end of the cryogenic container 5 placed on a container cover 4 made of a flange protruding outward from the upper end of the vacuum container 3. It is fixed. The liquid nitrogen 7a is stored in the space 6 formed between the low temperature container 5 and the vacuum container 3, and the liquid nitrogen 7a and the vacuum heat insulating layer 2 are stored.
Radiation heat from the outside of the vacuum container 3 is blocked by a and b, so that the heat intrusion into the low temperature container 5 can be kept to a minimum.
A liquid nitrogen container 14 containing liquid nitrogen 7b is inserted and installed above the cryogenic container 5, which covers the cryogenic container 5.

The superconducting coil 8 is housed in a liquid helium 9 stored in a low temperature container 5 while being immersed therein, and is cooled to the liquid helium temperature. A superconducting current lead 11 (hereinafter referred to as an oxide superconducting current lead), which is composed of an oxide superconducting conductor 13 extending upward and a metal conductor 12 made of copper following it, is connected to a terminal of the superconducting coil 8 via a connecting lead wire 10. Is connected, and the upper ends of the copper leads 12 are taken out of the vacuum container 3. The oxide superconducting conductor 13 is arranged in the low temperature container 5, and the copper lead 12 connected to the conductor 13 extends from the low temperature container 5 to the outside through a liquid nitrogen container 14 as a cooling container. A cable from an external power source (not shown) is connected to the copper current lead 12, and a large current is supplied to the superconducting coil 8 via the oxide superconducting current lead 11 to excite it to exert the function as a superconducting magnet device. .

As described above, in the conventional oxide superconducting current lead 11, the oxide superconducting conductor 13 cools the superconducting coil 8 with the liquid helium 9 that cools the superconducting coil 8 and the vaporized gas thereof, and the copper current lead 12 also. Is liquid nitrogen container 14
By cooling with liquid nitrogen 7b inside, Joule heat due to the exciting current from the external power supply is removed, heat invasion from the outside at room temperature is blocked, and heat conduction to the liquid helium 9 side can be greatly reduced. Has become.

Further, as an oxide superconducting current lead, a reinforcing material is provided around an oxide superconducting conductor, a liquid nitrogen anchor (liquid nitrogen container) is provided on the oxide superconducting conductor, and a copper lead is connected thereto. No. 6-314616. The low temperature side below the liquid nitrogen temperature is an oxide superconducting conductor, and the high temperature side above the nitrogen temperature is a metal lead.A bellows or a buffer layer electrode is placed between the oxide superconducting conductor and the metal lead. A method of providing a portion and joining is described in JP-A-5-21228.

[0007]

As described above, according to the prior art, the oxide superconducting conductor is provided with the reinforcing material, and the reinforcing material is provided with the flexible liquid nitrogen anchor so as to connect the oxide superconducting conductive lead. It is possible to absorb heat shrinkage and reduce the heat entering from the copper current lead on the high temperature side. Further, there is an advantage that the thermal contraction of the oxide superconducting conductor can be absorbed by joining the oxide superconducting conductor and the copper current lead by providing a flexible bellows or a buffer layer.

However, when the superconducting coil 8 becomes large in size and a large current is applied, its electromagnetic vibration is transmitted to the peripheral outer frame and the vacuum heat insulating container 1 to generate mechanical vibration, which is caused by the oxide. There is a problem that the connection part of the oxide superconducting conductor 13 is transmitted to the superconducting current lead 11 and causes mechanical fatigue to be damaged. Also, even if it is small, it is mounted on a traveling vehicle body such as a magnetic levitation train, or a superconducting magnet. When moving as a device, mechanical vibration occurs in the vacuum heat insulating container 1 supporting the oxide superconducting current lead 11 or the outer frame itself, which causes the oxide superconducting current lead 1 to move.
There was a problem that it was transmitted to 1 and damaged. Further, when the power supply frequency to the superconducting coil 8 fluctuates, the displacement is large and vibrates slowly at a low frequency, but the vibration is small but the amplitude is fast at a high frequency. If such vibration continues for a long time, mechanical fatigue occurs not only in the oxide superconducting conductor 13 but also in the electrode portion connecting the oxide superconducting conductor 13, the oxide superconducting conductor 13 itself is damaged, and the reliability is not deteriorated. Since it becomes an oxide superconducting current lead with weak mechanical strength that cannot be used for a long period of time, a support structure for the oxide superconducting current lead that can prevent vibration transmission from the outside in parallel with heat shrinkage absorption by cooling is also provided. Was wanted.

The present invention has been made in view of the above points, and it is an object of the present invention to absorb the thermal contraction of the oxide superconducting conductor on the low temperature side which constitutes the oxide superconducting current lead. Expansion and contraction for vibration absorption that can absorb the vibration transmitted from the outside through the metal conductor on the high temperature side that constitutes the superconducting current lead, that is, from the vacuum container around the low temperature container that houses the oxide superconducting current lead or the outside. (EN) It is intended to provide a support structure for an oxide superconducting current lead having a long life and high reliability, which constitutes a support structure by members and simultaneously performs heat shrinkage by cooling and external vibration transmission and absorption, is resistant to mechanical vibration.

[0010]

According to the present invention, a cooling container containing a first cooling medium is provided in a second cryogenic container installed in an upper portion thereof.
An oxide consisting of an oxide superconducting conductor connected to a superconducting device immersed in a cooling medium, and a metal conductor having a terminal coupled to an upper terminal of the oxide superconducting conductor and extending upward through a cooling container. It is a support structure for a superconducting current lead. Then, the metal conductor is connected to an external power source at room temperature. Hereinafter, each support structure of the present invention will be described.

In order to achieve the above object, the first aspect of the present invention
The support structure of the oxide superconducting current lead of, the expansion joint for electricity is provided between the flange-shaped flange plate provided at the lower end of the metal conductor and the terminal of the metal conductor, and between the flange plate and the bottom portion of the upper refrigerant container. Then, a vibration absorbing elastic member is provided around the metal conductor. Then, it is preferable that a copper bellows is used as the expansion joint for energization and a bellows made of copper, a copper alloy or stainless steel is used as the vibration absorbing expansion member.

In the above support structure for the first oxide superconducting current lead, the oxide superconducting current lead is connected to the superconducting device (here, the superconducting coil), that is, the temperature of the first cooling medium (here, liquid nitrogen) or lower. The low temperature side is formed of an oxide superconducting conductor, and the high temperature side above the liquid nitrogen temperature is formed of a metal conductor. The cooling container for storing liquid nitrogen cools the metal conductor with liquid nitrogen, supports the metal conductor, and thus supports the oxide superconducting current lead.

When the liquid conductor is cooled by storing the liquid nitrogen in the liquid nitrogen cooling container before storing the second cooling medium (here, liquid helium) in the low temperature container configured as above, the metal conductor is cooled. Is applied to the oxide superconducting conductor, and is particularly conducted to the terminal portion of the oxide superconducting conductor (actually, the terminal portion of the silver electrode at the end of the oxide superconducting conductor and the connecting lead wire connected to the superconducting coil). After that, when liquid helium is stored in a cryogenic container containing the superconducting coil, the oxide superconducting conductor is further cooled by the heat conduction from the connecting lead wire and the evaporative gas, and the heat shrinkage stress is changed to the oxide superconducting conductor. The silver electrode, or the connection terminal between the silver electrode and the metal conductor, or the connection part between the metal conductor and the liquid nitrogen container, concentrates and is damaged by thermal stress during repeated heating and cooling, or the connection lead wire is connected to the silver electrode. Mechanical damage occurs due to excessive vibration when connecting.

Further, when a large current is applied to the superconducting coil or a frequency fluctuation occurs, electromagnetic vibration of the superconducting coil is conducted from the cryogenic container to the vacuum heat insulating container and its surrounding outer frame, thereby covering the cryogenic container and the liquid. The oxide superconducting conductor was damaged by conduction from the nitrogen container to the metal conductor. further,
In the case of a superconducting magnet device in which the superconducting coil itself receives frequency variable power supply, or in the case of a superconducting magnet device that is mounted on a traveling vehicle body and is constantly subjected to mechanical vibration, the vibration for that vibration frequency is It is clear from the experimental results that the displacement becomes large and gentle vibration, but at high frequency, the displacement becomes smaller but the amplitude becomes faster. When such abnormal vibrations are generated and transmitted during the operation of the superconducting magnet device, not only the oxide superconducting conductor itself but also the fixed part of the silver electrode where the oxide superconducting conductor is integrated and fixed, or the silver electrode and the metal conductor. A large amount of mechanical stress is applied to the connection terminal part of the item (1), causing mechanical fatigue and damage. Furthermore, there is also a problem of vibration due to carrying during the carrying work or replacement work accompanying the movement of the superconducting coil.

An electrically conductive bellows which absorbs heat shrinkage stress and mechanical vibration in the metal conductor on the high temperature side above the liquid nitrogen temperature,
By interposing the vibration absorbing bellows, the heat shrinkage and the external vibration transmission by the cooling medium are absorbed by the energizing bellows and the vibration absorbing bellows and are not directly transmitted to the oxide superconducting conductor or the metal conductor.

The second oxide superconducting current lead support structure of the present invention comprises an expansion joint for energization interposed so as to form a part of the metal conductor in the longitudinal direction in a low temperature container, and an energization expansion joint for this energization. It supports the flange-shaped flange plate provided at the lower end of the expansion joint from below, and includes the vibration absorption expansion member arranged around the metal conductor and the current expansion expansion joint and vibration expansion expansion member fixed to the bottom of the refrigerant container. And a cylinder having a bottom plate that supports the lower end of the vibration-absorbing elastic member, and the bottom plate of the cylinder has a hole for passing a metal conductor. here,
The energizing expansion joint is a copper bellows, and the vibration absorbing expansion member is a copper, copper alloy or stainless steel bellows.

In the second support structure described above, the expansion joint for energization and the expansion member for vibration absorption provided on the metal conductor can absorb the vibration transmitted from the outside of the low temperature container and also absorb the thermal contraction on the low temperature side. The vibration absorbing elastic member receives the compressive stress of the weight of the metal lead on the power source side and the hanging load on the oxide superconducting conductor side.

The third oxide superconducting current lead supporting structure of the present invention is interposed so as to form a part of the metal conductor in the longitudinal direction in the cryogenic container, and the metal conductor end faces facing each other at this intervening position. Expansion joints for electricity, which consist of a pair of metal diaphragms joined together and metal pipes that fix the periphery of each diaphragm, and are arranged on the upper and lower surfaces of a flange-shaped flange plate provided on the outer circumference of the expansion joint for electricity. And a pair of upper and lower vibration-absorbing elastic members, and a cylindrical body having a bottom plate that is fixed to the bottom of the refrigerant container and encloses the vibration-absorbing elastic members, and supports the lower end of the lower vibration-absorbing elastic members. The bottom plate of the cylindrical body has a hole through which a metal conductor is passed, and both vibration absorbing elastic members are provided so as to be pressed toward the bottom of the cooling container.

The third support structure includes a metal diaphragm box for energization, each of which is composed of a metal diaphragm and a tubular body, and a pair of elastic members for vibration absorption, whereby the oxide superconducting conductor undergoes thermal contraction and external vibration. In addition to being able to absorb and, it is possible to obtain an oxide superconducting current lead suitable for carrying a large current.

The fourth oxide superconducting current lead support structure of the present invention is provided with an expansion joint for electric current interposed between a flange of the metal conductor and a terminal of the metal conductor. A vibration-absorbing elastic member was provided around the metal conductor between the flange plate and the bottom of the cooling container, and the lower terminal of the oxide superconducting conductor was stepped so that the tip of the small diameter protruded downward. A separate vibration-absorbing elastic member with the upper end attached to it is attached to the bottom of the cooling container to hang down the periphery of the oxide superconducting conductor, and the lower end is attached with a plate member that supports the above-described different vibration-absorbing elastic member. A scale bolt is provided, and the plate material has a hole through which the lower end of the lower terminal of the oxide superconducting conductor passes.

In the fourth support structure, the oxide superconducting conductor is provided with vibration absorbing elastic members at both ends of the oxide superconducting conductor in order to prevent the oxide superconducting conductor from being shaken. A supporting structure that can cope with vibration due to fluctuations can be configured, and vibration absorption and heat shrinkage with high mechanical strength and long life can be achieved, and transportation work becomes easy.

The fifth oxide superconducting current lead support structure according to the present invention is a vibration absorbing elastic member extending around the metal conductor between the flange-shaped flange plate provided at the lower end of the metal conductor and the upper bottom of the cooling container. A member is provided, the lower terminal of the oxide superconducting conductor is stepped, and the lower tip of the small diameter is projected, and another vibration absorbing elastic member having an upper end attached to the step is provided, and at the bottom of the cooling container. A tube body having a bottom plate which is fixed and encloses and hangs down the oxide superconducting conductor, and which supports the above-mentioned another elastic member for vibration absorption is provided, and the bottom plate of the cylinder is the lower tip of the lower terminal of the oxide superconducting conductor. It is characterized by having a hole for passing through.

In the fifth support structure, since the oxide superconducting conductor and the like are housed in the cylindrical body, the assembling work is facilitated and the workability is improved, and the oxide superconducting conductor is surrounded by the vibration absorbing cylindrical body. Therefore, even if an object falls or is scattered from the surroundings, it does not directly collide with the oxide superconducting conductor, so that it is possible to improve protection during work and transportation.

A sixth support structure for an oxide superconducting current lead according to the present invention has a first cylindrical body that surrounds a side surface of the oxide superconducting conductor, and a brim shape provided on the upper surface of the first cylindrical body and the upper end of the terminal of the metal conductor. A first vibration absorbing elastic member provided between the first vibration absorbing member and the flange plate,
A second cylinder fixed to the bottom of the cooling container and including the first cylinder to hang down, a bottom cover of the second cylinder, and a first cylinder provided between the inner surface of the bottom cover and the lower surface of the first cylinder. (2) a vibration-absorbing elastic member, a lower terminal of the oxide superconducting conductor having a stepped shape with a lower tip of a small diameter protruding, and a third vibration-absorbing elastic member provided between the step and the inner surface of the bottom cover. It is characterized in that it comprises a plurality of fourth vibration-absorbing elastic members radially provided at least at two upper and lower positions between the first cylinder and the second cylinder, and the bottom cover has a hole through which the lower tip portion is passed.

In the sixth support structure, first to third vibration absorbing elastic members for absorbing longitudinal vibration and a fourth vibration absorbing elastic member for absorbing lateral vibration are provided, and the first and second double structures are provided. Since the cylindrical body is used, the vibrations transmitted from the outside are not concentrated in one pole but are dispersed and absorbed, and even if the vibration displacement changes continuously, it is less likely to be damaged, resistant to mechanical fatigue, and highly reliable. A vibration absorber having a long life can be obtained.

The seventh oxide superconducting current lead supporting structure of the present invention has a step in which the lower terminal of the oxide superconducting conductor is stepped so that the lower tip of the small diameter is projected, and the upper end of the step is provided. The attached first vibration absorbing elastic member, a plurality of long bolts that are fixed to the bottom of the cooling container and hang down around the oxide superconducting conductor, and the first vibration absorbing elastic member attached to the lower end of the long bolt. A lower plate that supports the member, and a pair of second plates that are attached to the peripheral surfaces of the long bolts at the lower ends thereof to sandwich the lower plate.
A vibration absorbing elastic member, and a pair of third vibration absorbing elastic members sandwiching a flange plate that is attached to the peripheral surface of the long bolt and extends from the terminal of the metal conductor, and the lower plate member is an oxide. It is characterized by having a hole through which the lower end of the terminal of the terminal of the superconducting conductor passes. It is preferable that the first vibration absorbing elastic member is a metal bellows, and the second and third vibration absorbing elastic members are metal coil springs.

The seventh support structure has a structure in which long bolts and coil springs are used in addition to the vibration-absorbing bellows to absorb external vibrations. Therefore, the structure is simplified and easily manufactured. The cost can be reduced.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a diagram showing a main part of a support structure for an oxide superconducting current lead according to a first embodiment of the present invention. It should be noted that the oxide superconducting current lead described below has the same structure as described with reference to FIG.
It refers to a portion in which an oxide superconducting conductor and a metal conductor are combined.

As shown in FIG. 1, the oxide superconducting current lead support structure of the first embodiment is generally an oxidation in which a superconducting tape wire is spirally wound around a cylindrical core material 16. Object superconducting conductor 17, conductive bellows 20a connected to the upper side of oxide superconducting conductor 17 via connection terminals 18, 23, copper lead 22 which is a metal conductor connected to the upper end of conductive bellows 20a, and copper lead 22 The vibration absorption bellows 21a is provided between the brim-shaped terminal 28 provided at the lower end of the base and the bottom of the liquid nitrogen container 15 disposed above the flange 28 so as to be processed.

The superconducting tape wire which is wound around the cylindrical core material 16 and which constitutes the oxide superconducting conductor 17 is adhesively fixed to the silver electrode 18 in a stepwise manner from the lower layer in order, and is attached to the outer periphery of the end portion. Is wrapped with silver tape 27, sintered and fixed. The silver electrodes 18 provided on the upper and lower ends of the oxide superconducting conductor 17 are connection terminals. The silver electrode 18 at the upper end is combined with the connection terminal 23 joined to the lower end of the energization bellows 20a, that is, the recess 24 provided in the connection terminal 23 of the energization bellows 20a is interposed with the metal spacer 19 to form the silver electrode 18. Insert the protrusions 25 provided to these protrusions 2
4 and 25 are fastened with a fixing bolt 26 to be joined.

The upper end of the energization bellows 20a is joined to a flange plate-like terminal 28 which constitutes the lower end of the copper lead 22, and the vibration absorbing elastic member is arranged on the flange plate-like terminal 28 so as to surround the copper lead 22. The vibration absorbing bellows 21a is joined thereto. The fixing flange 29 for fixing the upper end of the vibration absorbing bellows 21a with a bolt is a box-shaped fixing frame 3 fixed to the bottom of the liquid nitrogen container 14 via an insulator 30.
It is attached to 1. The copper lead 22 penetrates the liquid nitrogen container 15 and extends upward.

In the oxide superconducting current lead of the first embodiment having the above-described structure, the conductive bellows 20a is provided in the vicinity of the connecting terminal portion 23 of the metal lead 22, so that the conductive bellows 20a is arranged below the conductive bellows 20a. Even if the oxide superconducting conductor 17 side is cooled by the heat conduction of the liquid helium 9 or the evaporative gas, the heat shrinkage is absorbed by the energizing bellows 20a.

Further, since the vibration absorbing bellows 21a is provided so as to surround the lower end portion of the metal lead 22 and the vibration absorbing bellows 21a is fixed to the fixed frame 31, when the superconducting coil 8 is energized with a large current or at a variable frequency. Electromagnetic vibrations and mechanical vibrations that occur when a force is applied are absorbed by the interaction between the box-shaped fixed frame 31 and the vibration absorbing bellows 21a.

As described above, the metal lead 22 is provided with the energizing bellows 20a and the vibration absorbing bellows 21a, and the vibration absorbing bellows 21a is provided with the box-shaped fixing frame 31 so as to be supported. Different displacement electromagnetic vibrations due to fluctuations, external mechanical vibrations transmitted from the vacuum insulation container, or the surrounding outer frame, or unilateral unreasonable swinging eccentricity from the superconducting coil 8 side during assembly work, oxide A silver electrode 18 portion fixing the superconducting conductor 17 or the oxide superconducting conductor 17, and also a silver electrode 18
Since the centralized transmission to the connection terminal portion 23 of the metal lead 22 is eliminated, it is less likely to be damaged, is resistant to electromagnetic mechanical vibration, has good vibration absorption and can be used for a long time with peace of mind, and is reliable and long-lasting. It is possible to form a support structure for an oxide superconducting current lead, which has a long life. The fixed frame 31 provided at the bottom of the liquid nitrogen container 14 is provided for facilitating the attachment of the vibration absorbing bellows, the cylindrical body to be described later, and the long bolt, and is not limited to the fixed frame, and the liquid nitrogen container can be appropriately used. The bottom of 14 may have a structure that facilitates attachment thereof.

Next, a second embodiment of the present invention will be described in detail with reference to FIG. In the second embodiment, the support structure for the oxide superconducting current lead of the first embodiment shown in FIG. 1 is provided for the conducting bellows 20a provided adjacent to the connection terminal portion 23 of the oxide superconducting conductor 17. The position is provided in the middle of the metal lead 22, and the lower end of the conductive bellows is supported by the vibration absorbing bellows. In FIG.
A conductive bellows 20b that absorbs thermal contraction of the oxide superconducting conductor 17 on the low temperature side is arranged at a position slightly apart from the connection terminal portion 23, and the upper end plate 32 of the conductive bellows 20b has a fixing frame 31 with an insulator 30 interposed therebetween. And the energized bellows 20
The lower end plate 33 of b is supported by the vibration absorbing bellows 21b.
At this time, the upper end of the vibration absorbing bellows 21b is accurately mounted in the annular groove 34 provided on the lower surface of the lower end plate 33, and the lower end of the vibration absorbing bellows 21b is received by the storage case 36 which is a cylindrical body. To the fixed frame 31 and bolt 37
It is fixed at a. Then, in the storage case 36 that stores and fixes the energizing bellows 20b and the vibration absorbing bellows 21b,
An assembling work bolt 38 is provided and is configured so that the strength of the energizing bellows 20b and the vibration absorbing bellows 21b can be adjusted.

Further, in FIG. 2, the bolts 37b are connected in the middle of the metal leads 22 in the longitudinal direction. However, since this is long from the fixed frame 31 for fixing the storage case 36 to the connection terminal portion 23, the bolts 37b are provided. It is provided in consideration of the ease of assembly work.

In the support structure for the oxide superconducting current lead of the second embodiment having the above-described structure, the vibration absorbing bellows 21b is arranged below the lower end plate 33 of the energizing bellows 20b, and the oxide superconducting current flow is controlled. Since the support structure supports the leads, the load of the metal leads 22 or the contraction load on the oxide superconducting conductor 17 side becomes a compressive load and is applied to the conductive bellows 20b and the vibration absorbing bellows 21b. Since the strength can be improved and the energizing bellows 20b and the vibration absorbing bellows 21b are housed in the housing case 36, for example, even if one of the bellows is damaged,
It does not fall around the oxide superconducting conductor 17 and achieves the same effect as that of the first embodiment while preventing scattering when the bellows is broken, that is, strong against electromagnetic mechanical vibration and vibration absorbing property. The life can be extended well.

FIG. 3 shows a support structure for an oxide superconducting current lead according to a third embodiment of the present invention. First (second)
In the embodiment, the heat shrinkage on the low temperature side and the vibration from the outside are absorbed by the metal conductive bellows 20a (20b) and the vibration absorbing bellows 21a (21b) provided in series on the metal lead 22 side. However, in the third embodiment, the upper and lower two metal diaphragms 39 are provided in the middle of the metal lead 22.
A metal diaphragm box 40 as an energizing diaphragm joint including a and 39b and a cylindrical body 41 surrounding the outer circumferences of the diaphragms 39a and 39b is provided, and a flange-shaped flange plate 42 is attached to the outer circumference of the pipe body 41. The vibration-absorbing bellows 21c and 21d made of metal are arranged above and below, the vibration-absorbing bellows 21c and 21d are housed in a fixed case 43 which is a cylindrical body, and the fixed case 43 is provided below the liquid nitrogen container 14 via an insulator 30. It is fixed to the fixed frame 31 with bolts 37c and 37d. The metal diaphragm box 40 is a current-carrying body instead of the current-carrying bellows.

As described above, even when the metal diaphragm 22 is provided with the metal diaphragm box 40 and the metal diaphragm box 40 is supported by the vibration absorbing bellows 21c and 21d, the oxide superconducting conductor 17 on the low temperature side is sufficiently contracted by heat. The metal diaphragm 39b can absorb the vibration, and the vibration transmission from the outside can also be prevented by the metal diaphragm box 4.
Since the vibration absorbing bellows 21c and 21d are installed above and below the zero guide plate 42, external vibration can be completely shut off.

Further, if the metal diaphragm box 40 has a heat-shrinkable structure, the metal lead 22 can be easily manufactured even for a large current and is large in size, and the heat-shrinkable portion can be made sturdy, so that the mechanical strength is improved. Other than that,
It is possible to obtain the same effect as that of the first embodiment.

FIG. 4 shows a support structure for an oxide superconducting current lead according to a fourth embodiment of the present invention. In the first to third embodiments, the metal conductive bellows 20a and 20b or the metal diaphragm box 40 are provided in the middle of the metal lead 22, and the vibration absorbing bellows 21a and 2b are provided.
1b, or vibration absorbing bellows 21c and vibration absorbing bellows 21d
Then, the oxide superconducting conductor 17 is fixed only on one side to prevent vibration transmission from the outside and to absorb heat shrinkage. In the fourth embodiment, both the upper and lower metal leads 22 of the oxide superconducting conductor 17 and the lower silver electrode 44 are supported so as to absorb vibrations. FIG. 4 shows the fourth embodiment.
This will be described in detail with reference to FIG. In this oxide superconducting current lead support structure, the connection terminal portion 23 of the metal lead 22 connected to the upper silver electrode 45 of the oxide superconducting conductor 17 is used.
Conductive bellows 20c is provided adjacent to the
A vibration absorbing bellows 47 is integrally provided on the upper surface of the flange plate 46 at the upper end of 0c. The upper end of the vibration absorbing bellows 47 is accurately mounted on the step portion 49 of the insulating flange 48 fixed to the fixed frame 31. On the other hand, the lower silver electrode 44 on the low temperature side is supported so as to be lifted by the metal vibration bellows 51 from below. That is, a plurality of long bolts 50 are hung from the fixed frame 31 through the insulating flange 48, a disc 52 is fixed to the lower ends of these long bolts 50, and a metal vibration absorption bellows 51 is mounted on the disc 52. The lower silver electrode 44 is installed on the vibration absorbing bellows 51. Thus, the oxide superconducting current flow lead 53 is vibration-supported by the vibration-absorbing bellows 47, 51 from both upper and lower sides.

The support structure of the oxide superconducting current lead 53 of the fourth embodiment configured as described above absorbs thermal contraction at both ends of the oxide superconducting conductor 17, and at the same time, the vacuum insulation container 1 or Since it has a vertical support structure capable of absorbing the vibration transmission from the outside, it prevents the lower side vibration of the oxide superconducting conductor 17 due to the external vibration transmission, and prevents the one-sided shake during the assembly work or the movement. Since it is possible to construct a supporting structure that is strong in dynamic strength and capable of simultaneously performing heat shrinkage and vibration absorption, it is possible to obtain a support structure for the oxide superconducting current flow lead 53 that is capable of improving vibration absorbing heat shrinkage and extending the life, and that is also suitable for transportation work. To be

FIG. 5 shows a supporting structure for an oxide superconducting current lead according to a fifth embodiment of the present invention. The fifth embodiment includes a liquid nitrogen container 14 for suspending and supporting the oxide superconducting current lead 53, a fixed frame 31 fixed to the liquid nitrogen container 14, and a vibration absorbing bellows for absorbing vibration transmission from the outside thereof. It is designed to be held in. The heat shrinkage on the oxide superconducting conductor 17 side due to cooling is absorbed by the bottom plate 54 of the liquid nitrogen container 14 for fixing the metal lead 22. On the upper high temperature side, the mechanical vibration from the outside and the vibration transmitted from the superconducting coil side are connected to the connection terminal portion 2 of the metal lead 22.
Vibration is absorbed by the vibration absorbing bellows 59a provided in the vicinity of No. 3, and vibration absorbing bellows 59b supporting the silver electrode 60 below the oxide superconductor 17 at the lower low temperature side. The upper vibration-absorbing bellows 59a and the lower vibration-absorbing bellows 59b are housed in a vibration-absorbing cylindrical body 62 fixed to the fixed frame 31 via an insulator 57 so as to be suspended. The vibration bellows 59a on the upper high temperature side includes a flange-like flange plate 56 provided on the outer periphery of the connection terminal portion 23 of the metal lead 22 and the fixed frame 3 above the flange plate 56.
1, the insulator 57 is interposed between the upper end surface of the vibration absorbing bellows 59a and the fixed frame 31, and the insulating layer 55 is interposed between the lower end surface of the vibration absorbing bellows 59a and the guide plate 56. It is electrically isolated. The vibration bellows 59b on the lower temperature side supports the silver electrode 60 on its upper end surface,
The lower end surface is attached to the inner surface of the bottom plate of the vibration absorbing cylindrical body 62 via an insulating layer 64. The vibration absorbing cylindrical body 62 is provided with a cooling gas flow hole 61 penetrating the cylinder wall. Further, an annular groove 63 for positioning the vibration absorbing bellows 59b is formed on the inner surface of the bottom plate of the vibration absorbing cylindrical body 62, and the insulating layer 64 provided on the inner surface of the bottom plate including this groove 63 does not short-circuit the silver electrode 60 and the vibration absorbing cylindrical body 62. Is formed. Further, the lower terminal portion of the silver electrode 60 projects from a hole formed in the central portion of the bottom plate.

According to the fifth embodiment configured as described above, the oxide superconducting conductor 17 of the oxide superconducting current lead 53 is installed in the vibration absorbing cylindrical body 62 in addition to vertically supporting the vibration. Therefore, even if an object is scattered from the periphery, it can be prevented from directly colliding with the oxide superconducting conductor 17.

Further, during the assembly work, the vibration absorbing cylindrical body 62 serves as a protective cover, so that the work can be facilitated and the work can be carried out with peace of mind, so that the work efficiency can be improved and the oxide superconducting conductor 17 can be absorbed. Since it is housed and supported in 62, the silver electrode 60 is not subjected to excessive mechanical stress at the time of connection work, or the oxide superconducting conductor 17 is not damaged by hitting parts or the like to improve protection. While working, it is possible to exhibit the same effect as that of the above-described embodiment.

FIG. 6 shows a support structure for an oxide superconducting current lead according to a sixth embodiment of the present invention. In the support structure of the sixth embodiment, the oxide superconducting current flow lead 53 is housed in a small diameter cylindrical body 72 (first cylindrical body) made of an insulating material provided with vibration absorbing bellows 59c and 78 on the upper and lower sides, and The cylindrical body 72 is configured to be supported in a large-diameter cylindrical body 73 (second cylindrical body) made of a nonmagnetic metal. The large-diameter cylindrical body 73 is
It is fixed by bolts 37c from the inside of the bottom plate of the fixed frame 31 via an insulating washer 76 so as to hang down on the fixed frame 31 above it via an insulator 57. In this embodiment, the metal lead 66 constituting the upper portion of the oxide superconducting current lead 53 has a large diameter portion in the vicinity of the connection terminal portion 23. Swing bellows 59 on the upper end side of the small diameter cylindrical body 72
The upper end of the c (first vibration absorbing elastic member) is attached to the lower surface of the plate flange 69 fixed to the step portion 65 of the large diameter portion of the metal lead 66 with the screw 70, and the vibration absorbing bellows 78 of the lower end portion of the small diameter cylindrical body 72 ( The second vibration absorbing elastic member) is attached to the inner surface of the bottom cover 79 of the large-diameter cylindrical body 73. A plurality of lateral vibration absorption bellows 74 (fourth vibration expansion / contraction members) are radially mounted between the small-diameter cylindrical body 72 and the large-diameter cylindrical body 73 at two upper and lower ends.

Then, the silver electrode 60 at the lower end of the oxide superconducting conductor which constitutes the lower part of the oxide superconducting current lead 53,
A vertical vibration absorbing bellows 77 (third vibration absorbing elastic member) is provided between the large diameter cylindrical body 73 and the inner surface of the bottom cover 79. A bottom cover 79, in which the vertical vibration absorbing bellows 77 and 78 are attached to the inside and outside, is fixed to the lower end of the large-diameter cylindrical body 73 with a bolt 37d.

At the interposition of the lateral vibration bellows 74 between the small diameter cylindrical body 72 and the large diameter cylindrical body 73, the mounting grooves 80b, 80a are partially installed so that the lateral vibration absorbing bellows 74 does not move due to external vibration. Is provided. A screw hole 81 is provided in the large-diameter cylindrical body 73 at the position where the lateral vibration absorbing bellows 74 is interposed, and the adjusting screw 82 is provided in the screw hole 81.
By inserting, the upper and lower portions of the oxide superconducting conductor 17 can be strongly fixed via the connection terminal portion 23 and the silver electrode 60 as needed.

In the sixth embodiment configured as described above, the vibration absorbing bellows 59c, the vertical absorbing bellows 77, for absorbing the longitudinal vibration of the oxide superconducting current flow lead 53,
By the small-diameter cylindrical body 72 and the large-diameter cylindrical body 73 having the 78 and the lateral vibration absorbing bellows 74, it is possible to prevent vibration transmission in both vertical and horizontal directions from the outside, and also to change the vibration displacement.
Since a large number of bellows can be used for vibration absorption, it is possible to obtain a vibration absorption support structure having good vibration absorption properties and high mechanical strength.

Further, even if the superconducting device becomes large in size and the oxide superconducting current lead 53 becomes thick due to the capacity of the power source, its vibration absorption support can be easily adjusted. When the oxide superconducting current lead 53 is carried as one component, the adjusting screw 82 is inserted into the screw hole 81 of the lateral vibration bellows 74 to adjust the oxide superconducting conductor 17 from mechanical vibration. Since it is possible to prevent damage, it can be used as a vibration absorbing container having high vibration absorbing property.

FIG. 7 shows a support structure for an oxide superconducting current lead according to the seventh embodiment of the present invention. In the seventh embodiment, a plurality of long bolts 50n hanging from the fixed frame 31 are provided around the oxide superconducting current lead composed of the metal lead 22 and the oxide superconducting conductor 17 connected to the metal lead 22. 50n upper and lower coil springs 84a and 84b mounted in a pair of two upper and lower stages, each long bolt 50n lower and upper two coil springs 84c and 84d mounted in a pair, and below the silver electrode 60 at the lower end of the oxide superconducting conductor 17. The support structure is configured by using the vibration absorbing bellows 59b or the like attached to the. More specifically, the connection terminal portion 23 of the metal lead 22
A disk-shaped fixed guide plate 83 is provided in the vicinity of the insulating layer 8.
A disk-shaped guide plate 85 is provided to project from the fixed guide plate 83 in the circumferential direction with the fixed guide plate 85 interposed therebetween, and the fixed guide plate 85 is attached to the upper portion of the long bolt 50n.
A fixed disc 8 for sandwiching and supporting between 4b and a vibration absorbing bellows 59b attached to the silver electrode 60 on the low temperature side from below.
6 is provided, and the fixed disc 86 is supported by being sandwiched between coil springs 84c and 84d attached to the lower portion of the long bolt 50n. Thus, the thermal contraction, mechanical vibration, and shock applied to the oxide superconducting conductor 17 are prevented by the coil springs 84a to 84d.
It can be absorbed by the vibration absorbing bellows 59b. Each long bolt 50n is fixed to the inner surface of the bottom plate of the fixed frame 31 with a nut 88 via an insulator 57.

In the seventh embodiment configured as described above, the oxide superconducting current lead is projected from the connection terminal portion 23 of the metal lead 22 on the high temperature side through the fixed guide plate 83 through the fixed disc 86. Coil spring 8 that sandwiches and supports
4a, 84b, a coil spring 84c, 84d for sandwiching and supporting a vibration absorbing bellows 59b provided below the silver electrode 60 on the low temperature side, and a fixed disc 86 for mounting and supporting the vibration absorbing bellows 59b.
Since it is elastically supported by, the coil springs 84a to 84d and the vibration absorbing bellows 59b can absorb electromagnetic mechanical vibrations from both outside and inside, as in the previous embodiments. The disk-shaped guide plate 85 for fixing the coil springs 84a, 84b, 84c, 84d for absorbing vibration and the oxide superconducting conductor 17, or the fixed disk 86, can be easily manufactured in accordance with the strength. For example, the oxide superconducting conductor 17 can be easily recombined and fixed even if the length or thickness of the oxide superconducting conductor 17 changes.

Further, for supporting the oxide superconducting conductor 17 for vibration absorption, a threaded portion 90 is cut at both ends of the long bolt 50n, and the coil springs 84a, 84b and 84c, 8 are attached to the threaded portion 90.
4d, a disc-shaped guide plate 85, a fixed disc 86 having a vibration absorbing bellows 59b, and the like, and coil springs 84a, 84b thereof.
And 84c, 84d are tightened with tightening nuts 91a, 91b, and 91c to absorb and fix the vibration, so that the vibration absorbing force can be easily adjusted. Therefore, the place where mechanical vibration occurs or the place where shock occurs, or the place where electromagnetic vibration is large. etc,
It is possible to easily fix and support vibration absorption that corresponds to the surrounding environment and mechanical devices, and because the structure is simple and it can be manufactured at low cost, it is possible to promptly respond to manufacturing, reduce cost, and improve heat shrinkage and vibration absorption. A support structure for a conventional oxide superconducting current lead can be provided.

[0054]

As described above, according to the present invention,
The first to third oxide superconducting current flow support structures according to the present invention are provided with an expansion joint for energization and an expansion joint for vibration absorption on the metal conductor side, so that thermal contraction and electromagnetic vibration of the oxide superconducting conductor and oxide superconducting conductor can be achieved. Since it is configured to absorb mechanical vibration from the outside of the container that houses the current lead, heat contraction stress and each vibration are concentrated and transmitted to the silver electrode terminal that fixes the oxide superconducting conductor and the terminal portion of the metal conductor. It is possible to obtain a support structure for an oxide superconducting current lead that is resistant to thermal contraction and vibration and that is suitable for improving reliability and extending life.

Further, according to the present invention, in the fourth to seventh oxide superconducting current lead supporting structures of the present invention, the expansion joint for conduction or the expansion member for vibration absorption is provided on the metal conductor side connected to the upper side of the oxide superconducting conductor. In addition, since the expansion and contraction member for vibration absorption is also provided on the lower side of the oxide superconducting conductor, the oxide superconducting conductor absorbs heat contraction, and the oxide superconducting conductor does not shake off due to external vibration. In addition, it is possible to obtain a support structure for an oxide superconducting current lead that can absorb vibrations, is resistant to heat shrinkage and vibrations, and is suitable for improving reliability and extending life. In addition, in the fifth and sixth support structures, the oxide superconducting conductor, the expansion joint for energization, and the expansion and contraction member for vibration absorption are configured to be housed in the cylindrical body. Therefore, the work of incorporating the oxide superconducting current lead into the cryogenic container can be facilitated, and the transportation of the oxide superconducting current lead can be facilitated. Further, in the sixth support structure, since the horizontal vibration-absorbing elastic member is provided in addition to the vertical vibration-absorbing elastic member, the vibration absorbing property against external vibration can be further improved.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing a support structure for an oxide superconducting current lead according to a first embodiment of the present invention.

FIG. 2 is a cutaway perspective view showing a support structure for an oxide superconducting current lead according to a second embodiment of the present invention.

FIG. 3 is a cutaway perspective view showing a support structure for an oxide superconducting current lead according to a third embodiment of the present invention.

FIG. 4 is a cutaway perspective view showing a supporting structure for an oxide superconducting current lead according to a fourth embodiment of the present invention.

FIG. 5 is a cutaway perspective view showing a supporting structure for an oxide superconducting current lead according to a fifth embodiment of the present invention.

FIG. 6 is a cutaway perspective view showing a supporting structure for an oxide superconducting current lead according to a sixth embodiment of the present invention.

FIG. 7 is a cutaway perspective view showing a support structure for an oxide superconducting current lead according to a seventh embodiment of the present invention.

FIG. 8 is a sectional view showing a simplified general structure of a superconducting magnet device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Vacuum heat insulation container 2a, 2b ... Vacuum heat insulation layer 3 ... Vacuum container 4 ... Container cover 5 ... Low temperature container 6 ... Space part 7a, 7b ... Liquid nitrogen 8 ... Superconducting coil 9 ... Liquid helium 10 ... Connection lead wire 11 ... Oxidation Superconducting current lead 12 ... Copper current lead 13 ... Oxide superconducting conductor 14 ... Liquid nitrogen container 15 ... Low temperature container cover 16 ... Cylindrical core material 17 ... Oxide superconducting conductor 18 ... Silver electrode 19 ... Metal spacers 20a, 20b, 20
c ... energizing bellows 21a, 21b, 21c, 21d ... vibration absorbing bellows 22 ... copper lead 23 ... connecting terminal part 24 ... concave part 25 ... convex part 26 ... fixing bolt 27 ... silver tape 28 ... flange terminal 29 ... fixing flange 30 ... insulation Body 31 ... Fixed frame 32 ... Upper end plate 33 ... Lower end plate 34 ... Recessed groove 36 ... Storage case 38 ... Assembly work bolts 39a, 39b ... Metal diaphragm 40 ... Metal diaphragm box 41 ... Tube 42 ... Flange plate 43 ... Fixed case 44 ... Lower side silver electrode 45 ... Upper silver electrode 46 ... Flange plate 47 ... Vibration absorbing bellows 48 ... Insulating flange 49 ... Step portion 50n ... Long bolt 51 ... Vibration absorbing bellows 52 ... Fixed disk 53 ... Oxide superconducting current lead 54 ... Bottom plate 55 ... Insulating layer 56 ... Flange plate 57 ... Insulator 58 ... Fixed end plate 59a, 59b ... Vibration absorbing bellows 9c ... 60 ... Silver electrode 61 ... Cooling gas flow hole 62 ... Vibration absorbing cylindrical body 63 ... Bellows mounting groove 64 ... Insulating layer 65 ... Step portion 66 ... Stepped metal lead 67 ... Inner diameter portion 69 ... Plate flange 71 ... Lower end plate 72 ... Small diameter cylindrical body 73 ... Large diameter cylindrical body 74 ... Horizontal vibration absorption bellows 76 ... Insulation washer 77 ... Vertical vibration absorption bellows 78 ... Vertical vibration absorption bellows 79 ... Bottom cover 81 ... Screw hole 82 ... Adjusting screw 83 ... Fixed guide plate 84a, 84b, 84c, 84d ... Expansion spring 85 ... Disc-shaped flange plate 86 ... Fixed disc 88 Nut 89 ... Insulating layer 90 ... Screw part

Claims (10)

[Claims] 1. An oxide superconducting conductor connecting a cooling container containing a first cooling medium to a superconducting device immersed in a second cooling medium in a cryocontainer installed at an upper portion, and an oxide superconducting conductor of the oxide superconducting conductor. In a support structure of an oxide superconducting current lead, which has a terminal that is coupled to an upper terminal and that extends upward through the cooling container, a flange-shaped flange plate provided at the lower end of the metal conductor. An oxide, characterized in that an expansion joint for energization is provided between the terminals of the metal conductor, and an expansion and contraction member for vibration absorption is provided around the metal conductor between the flange plate and the bottom portion of the refrigerant container above. Support structure for superconducting current leads. 2. An oxide superconducting conductor connecting a cooling container containing a first cooling medium to a superconducting device immersed in a second cooling medium in a cryocontainer installed above, and an oxide superconducting conductor of the oxide superconducting conductor. A support structure for an oxide superconducting current lead, comprising: a metal conductor having a terminal to be coupled to an upper terminal and extending upward through the cooling container; and a part of the metal conductor in the longitudinal direction in the cryocontainer. An expansion joint for energization interposed so as to form an expansion joint for supporting vibration from below and a flange-shaped flange plate provided at the lower end of the expansion joint for energization, and the refrigerant container A tubular body having a bottom plate that is fixed to the bottom of the energizing expansion joint and the vibration absorbing elastic member and hangs down, and that supports a lower end of the vibration absorbing elastic member. A hole with a metal conductor And a support structure for an oxide superconducting current lead. 3. The expansion joint for energization is a copper bellows,
The support structure for an oxide superconducting current lead according to claim 1 or 2, wherein the vibration absorbing elastic member is made of copper, a copper alloy or a bellows made of stainless steel. 4. An oxide superconducting conductor connecting a cooling container containing a first cooling medium to a superconducting device immersed in a second cooling medium in a cryocontainer installed at an upper part, and an oxide superconducting conductor of the oxide superconducting conductor. A support structure for an oxide superconducting current lead, comprising: a metal conductor having a terminal to be coupled to an upper terminal and extending upward through the cooling container; and a part of the metal conductor in the longitudinal direction in the cryocontainer. An expansion joint for energization, which includes a pair of metal diaphragms and metal pipes that fix the periphery of each diaphragm and are joined to the end faces of the metal conductors facing each other at the intervening position. A pair of upper and lower vibration-absorbing elastic members arranged on each of the upper and lower surfaces of the flange-shaped flange plate provided on the outer circumference of the expansion joint, and is hung down by including the vibration-absorbing elastic member fixed to the bottom of the refrigerant container. Below And a cylindrical body having a bottom plate for supporting the lower end of the vibration absorbing elastic member, and the bottom plate of the cylindrical member has a hole through which the metal conductor passes, and both vibration absorbing elastic members are pressed toward the bottom of the cooling container. A support structure for an oxide superconducting current lead, characterized in that it is provided separately. 5. An oxide superconducting conductor connecting a cooling container containing a first cooling medium to a superconducting device immersed in a second cooling medium in a cryogenic container installed at an upper portion via a lower terminal. A support structure for an oxide superconducting current lead, comprising: a metal conductor having a terminal coupled to an upper terminal of the oxide superconducting conductor and extending upward through the cooling container; An expansion joint for energization is provided between the flange-shaped flange plate and the terminal of the metal conductor, and a vibration absorbing expansion member is provided around the metal conductor between the flange plate and the bottom portion of the cooling container above. Provided, the lower terminal of the oxide superconducting conductor has a stepped shape with a small diameter tip protruding downward, and another vibration absorbing elastic member having an upper end attached to the stepped portion is provided and fixed to the bottom of the cooling container. Is the oxide superconductivity Is provided with a plurality of long bolts attached to the lower end of the lower end of the lower terminal, and a plurality of long bolts attached to the lower end of the elastic member for supporting the vibration absorption are provided. Support structure for oxide superconducting current lead. 6. An oxide superconducting conductor connecting a cooling container containing a first cooling medium to a superconducting device immersed in a second cooling medium in a cryogenic container installed at an upper portion via a lower terminal. A support structure for an oxide superconducting current lead, comprising: a metal conductor having a terminal coupled to an upper terminal of the oxide superconducting conductor and extending upward through the cooling container; A vibration-absorbing elastic member is provided around the metal conductor between the flange-shaped flange plate and the bottom of the cooling container above, and the lower end of the oxide superconducting conductor is stepped to project the lower tip of the small diameter. A different vibration absorbing elastic member having an upper end attached to the stepped portion, is fixed to the bottom of the cooling container and hangs down with the oxide superconducting conductor included, and the other vibration absorbing elastic member A cylinder with a bottom plate to support Only, and the bottom plate of the cylindrical body support structure of the oxide superconducting current lead and having a hole through which the lower tip. 7. An oxide superconducting conductor, which is connected to a superconducting device in which a cooling container containing a first cooling medium is immersed in a second cooling medium in a cryogenic container installed at an upper portion via a lower terminal. A support structure for an oxide superconducting current lead, comprising: a metal conductor having a terminal coupled to an upper terminal of the oxide superconducting conductor and extending upward through the cooling container; A first cylindrical body surrounding the
A first vibration absorbing elastic member provided between the upper surface of the cylindrical body and a flange-shaped flange plate provided on the upper end of the terminal of the metal conductor, and the first cylindrical body fixed to the bottom of the cooling container. A second cylindrical body which hangs down, a bottom cover of the second cylindrical body, a second vibration absorbing elastic member provided between an inner surface of the bottom cover and a lower surface of the first cylindrical body, and a lower side of the oxide superconducting conductor. Between the stepped portion and the bottom cover inner surface, a third vibration-absorbing elastic member provided between the stepped portion and the inner surface of the bottom cover, and between the first tubular body and the second tubular body are provided. A support structure for an oxide superconducting current flow lead, comprising: a plurality of fourth vibration absorbing elastic members provided at least at two upper and lower portions in a radial pattern, and the bottom cover has a hole through which the lower tip portion passes. 8. The support structure for an oxide superconducting current lead according to claim 7, wherein each of the vibration absorbing elastic members is a bellows made of copper, copper alloy or stainless steel. 9. An oxide superconducting conductor connecting a cooling container containing a first cooling medium to a superconducting device immersed in a second cooling medium in a cryogenic container installed at an upper portion via a lower terminal. A support structure for an oxide superconducting current lead, comprising: a metal conductor having a terminal coupled to an upper terminal of the oxide superconducting conductor and extending upward through the cooling container; The side terminal has a stepped shape with the lower tip of the small diameter protruding, and the first vibration absorbing elastic member having an upper end attached to the step and the bottom portion of the cooling container fixed to the oxide superconducting conductor. A plurality of long bolts that hang down around, a lower plate that is attached to the lower ends of the long bolts and supports the first vibration absorbing elastic member, and a lower plate of each of the long bolts that is attached to the bolt peripheral surface. A pair of second vibration absorbers sandwiching the lower plate And a pair of third vibration absorbing elastic members sandwiching a flange plate that is attached to the peripheral surface of the bolt at the upper end of the elongated bolt and projects from the terminal of the metal conductor. A support structure for an oxide superconducting current lead, characterized by having a hole through which a tip portion passes. 10. The oxide according to claim 9, wherein the first vibration absorbing elastic member is a metal bellows, and the second and third vibration absorbing elastic members are metal coil springs. Support structure for superconducting current leads.