JPH0520354U - Cryogenic container - Google Patents

Abstract

(57) [Abstract] [Purpose] To prevent thermal stress from acting between the refrigerant storage container and the vacuum container even when the temperature changes between room temperature and extremely low temperature. In a cryogenic container comprising a refrigerant storage container 4a for storing a refrigerant and a vacuum container 4b accommodating the refrigerant storage container 4a, a seat 8 is provided at a lower portion of the refrigerant storage container, and a receiving seat 8 is provided inside the vacuum container. A fixed seat 9 is provided on the stud-shaped support structure 7 by sandwiching a flexible packing 10 between the seat and the fixed seat.
The structure will be combined with.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a support structure used for a cryogenic container.

[0002]

[Prior Art]

 Conventionally, when a cryogenic container consisting of a double cylinder of a refrigerant storage container that stores a refrigerant and a vacuum container is cooled to a low temperature, the refrigerant storage container shrinks due to heat. There is a problem that a dimensional difference occurs in a low temperature state. There has been a problem that the support structure, which is how to provide the movable part in order to absorb this dimensional difference, becomes complicated.

For example, as shown in FIG. 4, an open-dur type cryogenic container 4 in which a superconducting coil 1 is suspended from a suspension flange 3 by a support rod 2 having a heat insulating material 6 on the upper side thereof is a liquid helium storage liquid. The liquid helium container 4a is supported by the empty container 4b by the support structure 5, but when the liquid helium is stored in the liquid helium container 4a at a low temperature as compared with the assembled room temperature shown by the broken line in FIG. Since the liquid helium container 4a is thermally contracted, the mounting position of the support structure 5 rises as shown by the solid line, and a gap is created between the liquid helium container 4a and the vacuum container 4b.

At this time, if the support structure 5 is not movable, fixing it to the vacuum container 4b may deform or damage the support structure 5 or the vacuum container 4b. The support structure 5 loses its meaning.

[0005]

[Problems to be solved by the device]

 As described above, the conventional cryogenic container has a problem that the function of the support structure of the refrigerant liquid storage container in use is deteriorated. Therefore, an object of the present invention is to provide a cryogenic container having a supporting structure having a good supporting function in a cryogenic use state.

[0006]

[Means for Solving the Problems]

 A groove is movably formed in the vertical direction at the part that connects the refrigerant storage container that stores the refrigerant and the vacuum container of the support structure that fixes the vacuum container, and a flexible packing is provided in the radial direction. Put

[0007]

[Action]

 In this way, by inserting and fixing the flexible packing in the vacuum container, the difference in heat shrinkage of the refrigerant storage container is absorbed.

[0008]

【Example】

 An embodiment of the present invention will be described with reference to FIGS.

In an open-dur type cryogenic container 4 in which a superconducting coil 1 is hung from a hanging flange 3 by a support rod 2 having a heat insulating material 6 on the upper part thereof, a liquid helium container 4a for storing liquid helium is provided. At the lower part, a seat 8 for fixing one end of the steady rest stud 7 is provided. One end of the steady rest stud 7 is fixed to the seat 9, and a fixing ring 9 fixed to the vacuum container having a thin edge for supporting the steady rest stud 7 is provided on the other end of the vacuum container 4b side. A U-shaped groove 9a is provided at the tip of the thin edge of the ring 9. The steady stud 7 is put in the U-shaped groove 9a, and the flexible packing 10 is sandwiched from both sides and fastened with the flat washer 11 and the nut 12.

The flexible packing 10 has, for example, a disc spring shape as shown in FIG. 3, and is made of a material such as stainless steel or synthetic rubber such as nitrile rubber or fluorine rubber, which does not adversely affect vacuum. Choose one that does not reach. In this case, the flexibility depends on the shape, material, etc., but the flexibility can be adjusted by using several disc spring-shaped ones in abutting relation.

According to this structure, when the liquid helium is stored in the liquid helium container 4a at low temperature, the axial thermal contraction of the liquid helium container 4a is caused by the U-shaped groove 9a of the fixing ring 9. The heat-shrinkage in the radial direction is absorbed by the flexible packing 10. In particular, when the superconducting coil is operated by alternating current, it is necessary to provide a support structure that can prevent the vacuum container from being deformed or damaged without being able to suppress vibration due to the space created by cooling. Can be formed.

[0012]

[Effect of the device]

 According to the present invention, when a cryogenic container consisting of a container for storing a refrigerant and a vacuum container is cooled to a low temperature, the dimensional difference between the cryogenic container and the vacuum container caused by thermal contraction is absorbed. A vacuum container or a cryogenic container having a supporting structure capable of always fixing the refrigerant liquid storage container to the vacuum container without deformation or damage of the steady rest is obtained.

[Brief description of drawings]

FIG. 1 is a sectional view showing a cryogenic container according to an embodiment of the present invention.

FIG. 2 is a view on arrow AA of FIG.

FIG. 3 is a perspective view of a packing used in the above embodiment.

FIG. 4 is a sectional view showing a conventional cryogenic container.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Superconducting coil 2 ... Support rod 3 ... Suspension flange 4 ... Cryogenic container 4a ... Liquid heliuke container 4b ... Vacuum container 5 ... Support structure 6 ... Heat insulating material 7 ... Steady stud 8 ... Receiving seat 9 ... Fixing ring 9a ... U-shaped groove 10 ... Packing 11 ... Plain washer 12 ... Nut

Claims (2)

[Scope of utility model registration request] 1. A cryogenic container comprising a refrigerant storage container for storing a refrigerant and a vacuum container for accommodating the refrigerant storage container, wherein a receiving seat is provided at a lower portion of the refrigerant storage container and fixed inside the vacuum container. A cryogenic container characterized in that a seat is provided, and the receiving seat and the fixed seat are connected by a stud-like support structure sandwiching a flexible packing. 2. The cryogenic container according to claim 1, wherein the fixed seat inside the vacuum container is a ring having a thin edge.