JPH0417308B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a double-shell insulation container suitable as a container for cryogenic liquefied gases such as liquid helium (270°C) and liquid hydrogen (-253°C). .

[Conventional technology and its issues]

Conventionally, a double-shell insulated container for storing cryogenic liquefied gas such as liquid helium or liquid hydrogen has a support material 3 between an outer container 1 and an inner container 2, as shown in FIGS.
is provided, and the inner container 2 is supported and suspended from the outer container 1. In such an inner container support structure, when the inner container 2 stores cryogenic liquefied gas as described above, the amount of heat input and heat radiation from the support material 3 is proportional to the size of the support material 3. Therefore, it was difficult to suppress the amount of heat input and heat dissipation. Further, as the size of the container progresses, the scale of the supporting material also increases, and even if the heat insulating structure 4 is provided between both containers, there are problems such as difficulty in creating the desired cryogenic temperature region.

In addition, when the inner container is a cryogenic container, if the inner container is a small container, the boil-off will be larger than that of a large container, and the amount will be about 10%, so it is necessary to suppress the amount of heat input as much as possible. Support materials must be devised. In addition, in order to suppress heat input from the support material, it is necessary to make the support material longer, which means that the gap between the inner and outer containers has to be made larger, which ultimately necessitates the need for an outer container. There is a problem of increasing the size even further.

An object of the present invention is to support an inner container within an outer container without a support material by electromagnetic repulsion, and to prevent heat input and
The object is to provide a heat insulating container that does not radiate any heat.

[Means to solve the problem]

The configuration of the present invention that solves the problems of the prior art is as follows:
1. In a double-shell structure heat-insulating container in which a vacuum heat-insulating space is formed between inner and outer containers 14 and 11 having similar cylindrical structures, the outer top of the inner container 14 and
The electromagnetic coils 16b and 16c are disposed vertically symmetrically at the bottom, and the electromagnetic coils 16 are respectively wound and disposed at the center of the outer surface of the inner container 14, while the outer top, bottom, and Ring-structured magnets 13a, 13 corresponding to the electromagnetic coils 16a, 16b, 16c are provided at the center of the outer surface.
b, 13c, and the inner and outer containers 14, 11 are made of non-magnetic metal.

〔Example〕

Next, details of embodiments of the present invention will be explained with reference to the drawings.

FIG. 1 is a longitudinal sectional front view showing one embodiment of the present invention.

Reference numeral 11 denotes an outer container having a cylindrical structure, which is disposed on a base by support legs 12. A magnet 13a having a ring structure is wound around the center of the outer surface of the outer container 11, and magnets 13b and 13c having a ring structure are arranged at the top and bottom of the outer container 11.
are arranged vertically symmetrically. 14 is the outer container 1
1, the inner container has a cylindrical structure similar to the outer container 11 enclosed through a vacuum insulation space 15, and the outer container 11 is located at the center, top, and bottom of the outer surface of the inner container 14. Magnet 13 placed in
Electromagnetic coils 16a, 16b, and 16c are wound and arranged to correspond to the coils a, 13b, and 13c.

17 and 18 are hatches provided oppositely on the inner and outer containers 14 and 11, and these hatches 17 and 18 are
For example, in the case of a cryogenic test device, the hatches 17 and 18 are used to take a test object into and out of the inner container 14, and the hatches 17 and 18 are not connected to each other. In addition, 19 in the figure is inside,
Flexible tube 20 between outer containers 14 and 11
The supply and exhaust equipment is designed to prevent future heat input and radiation. In addition, the above hatch 17,1
8 indicates inner and outer containers 14 and 1 as shown by imaginary lines.
The hatches 17 and 18 can be provided on the side wall surface of the test piece 1, and as mentioned above, these hatches 17 and 18 are used for taking in and taking out the test object in a cryogenic atmosphere.
The present invention is not limited to providing this hatch, since it is unnecessary when used for other purposes.

Further, the outer container 1 is made to correspond to the electromagnetic coils 16a, 16b, 16c which are wound around the inner container 14.
A repulsive force is generated between the first magnets 13a, 13b, and 13c due to the electromagnetic force generated when the electromagnetic coils 16a, 16b, and 16c are energized, and the inner container 14 is suspended in the air. The electromagnetic coils 16a, 16b,
16c and the mounting positions of magnets 13a, 13b, and 13c are positioned as described above.

Furthermore, the inner container 1 may be damaged due to unexpected external forces such as earthquakes.
It goes without saying that consideration should be given to the strength of the repulsive force so that the distance between the container 4 and the outer container 11 does not become uneven.

〔Effect of the invention〕

According to the configuration of the present invention as described above, the following effects can be obtained.

(a) Electromagnetic coils 16a and 16 wound around the outer top, bottom, and center of the outer surface of the inner container 14
The electromagnetic coils 16a, 16b, 16 are
Magnets 13a provided at the outer top, bottom, and center of the outer surface of the outer container corresponding to c.
13b and 13c are repelled, and the inner container 14 can be suspended and supported within the outer container 11 without any support material due to the electromagnetic repulsion force acting equally on the upper, lower, left and right sides. Therefore, it is possible to eliminate heat input and heat radiation from the supporting material as in the conventional case, and for example, boil-off when used as a cryogenic container can be suppressed as much as possible, and the container structure can be simplified.

(b) Since the inner and outer containers 14 and 11 are made of non-magnetic metal material, the electromagnetic coils 16a, 16b,
Electromagnetic field lines and magnet 13 due to energization of 16c
The magnetic lines of force of a, 13b, and 13c effectively repel each other without loss, and the inner container 14 with respect to the outer container 11
The accuracy of the levitation and suspension action can be increased.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view of the double-shell heat-insulated container of the present invention;
FIG. 2 and FIG. 3 are sectional views of conventional examples, respectively. 11...Outer container, 12...Support leg, 13a, 13
b, 13c...Magnet, 14...Inner container, 15...
Vacuum insulation space, 16a, 16b, 16c...electromagnetic coils.

Claims (1)

[Scope of Claims] 1. In a double-shell structure heat-insulating container in which a vacuum heat-insulating space is formed between outer containers 14 and 11 of similar cylindrical structures, an electromagnetic insulator is provided at the outer top and bottom of the inner container 14. The coils 16b and 16c are arranged vertically symmetrically, and the electromagnetic coils 16a are respectively wound around the center of the outer surface of the inner container 14, while the outer top, bottom, and center of the outer container 11 are arranged symmetrically. In the part, the electromagnetic coil 16a, 1
A double-shell heat-insulating container characterized in that magnets 13a, 13b, 13c having a ring structure corresponding to the magnets 6b, 16c are disposed, and the inner and outer containers 14, 11 are made of non-magnetic metal.