JP2744625B2 - Cryogenic container - Google Patents

Description

The present invention is used in, for example, a superconducting magnet for magnetic levitation of a linear motor car, and stores a liquid-phase refrigerant and a gas-phase refrigerant in which the liquid-phase refrigerant is vaporized. It relates to a cryogenic container.

[Prior Art] FIG. 3 is a cross-sectional view showing a conventional cryogenic container disclosed in, for example, Japanese Patent Application Laid-Open No. 56-152285, wherein (1) shows a moving body (not shown) such as a magnetic levitation vehicle. ) Is attached to the inner container, and (2) is an inner container attached to the outer container (1) via the support member (3). The outer container (1) and the inner container (2) It is a high vacuum space for heat insulation.
(4) is outer container (1), inner container (2) and support material (3)
It is a container body consisting of:

(5) is a refrigerant (cryogen) such as nitrogen or helium stored in the inner container (2), and the refrigerant (5) is a liquid-phase refrigerant (5a) and a gas phase obtained by vaporizing the liquid-phase refrigerant (5a). Refrigerant (5b)
It consists of The liquid level of the liquid-phase refrigerant (5a) indicates that the acceleration of the moving body to which the low-temperature container is attached is zero.
In this case, the moving body is horizontal, but tilts when the moving body is accelerated or decelerated in the left-right direction in the figure, and changes between the state of the solid line A and the state of the broken line B in the figure according to the direction and magnitude of the acceleration. Thereby, the position of the gas-phase refrigerant (5b) also changes between the first region (2a) and the second region (2b) in the inner container (2).

(6) is a first gas outlet pipe whose base end is drawn out of the container body (4) and the remainder is provided inside the container body (4), and the gas-phase refrigerant (5b) is a first gas outlet pipe. It is led out of the container body (4) by the pipe (6). The first gas outlet pipe (6) is located at the center of the inner vessel (2).
After being branched in two directions toward both ends of the, each is bent into a U-shape. Further, a first gas outlet pipe (6)
One end has a first opening (6a) facing the first region (2a), and the other end has a second opening (6b) facing the second region (2b). Have been. (7) is a valve provided at the base end of the first gas outlet pipe (6) and serving as a safety valve.

In the conventional cryogenic container configured as described above,
When the liquid level of the liquid-phase refrigerant (5a) is horizontal, such as when the moving body is stationary, both the first and second openings (6a) and (6b) open to the gas-phase refrigerant (5b). ing. For this reason, the gas-phase refrigerant (5b) enters the first gas outlet pipe (6) from both openings (6a) and (6b), and is led out of the container body (4).

Further, when the liquid level of the liquid-phase refrigerant (5a) changes to the state indicated by the solid line A due to acceleration / deceleration of the moving body, the gas-phase refrigerant (5b) moves to the first region (2a). At this time, the second opening (6b) is buried in the liquid-phase refrigerant (5a), but the first opening (6a) is open to the gas-phase refrigerant (5b). For this reason, the gas-phase refrigerant (5b) enters the first gas outlet pipe (6) only from the first opening (6a) and is drawn out, and the liquid-state refrigerant (5) is not drawn out. Conversely, the liquid level becomes the state of the broken line B,
When the gas-phase refrigerant (5b) moves to the second region (2b), only the second opening (6b) opens to the gas-phase refrigerant (5b), and only the gas-phase refrigerant (5b) flows from the second opening (6b). 5b) is led out of the container.

Thus, no matter which direction the acceleration of the moving body is in, the position of the gas-phase refrigerant (5b) only changes between the first area (2a) and the second area (2b). At least one of the second openings (6a) and (6b) is always open to the gas-phase refrigerant (5b). For this reason,
Even if the moving body accelerates or decelerates, only the gas-phase refrigerant (5b) is led out of the container body (4), and is not led out as a liquid.

Next, FIG. 4 shows another conventional example shown in the same publication as FIG. 3, in which the container body (4) and the refrigerant (5) are the same as in FIG.

In the figure, (8) is a first pipe whose base end is drawn out of the container body (4) and the remaining part is provided in the container body (4), and the distal end of the first pipe (8) is Inner container (2)
In the first region (2a). (9) is the second pipe inserted into the first pipe (8) from one end of the first pipe (8).
The second pipe (9) is bent in a U-shape when it comes out of the tip of the first pipe (8). One end of the second pipe (9) is open in the first pipe (8), and the other end is a second region (2b) in the inner container (2).
It is open at. (10) is a second gas outlet pipe composed of a first pipe (8) and a second pipe (9).

Even in such a low-temperature container, as in the case of FIG. 3, even if the liquid level of the liquid-phase refrigerant (5a) is inclined, the first pipe (8)
And at least one of the ends of the second pipe (9) is open to the gas-phase refrigerant (5b). Therefore, regardless of the direction of acceleration and deceleration of the moving body, the second gas outlet pipe By (10), only the gas of the refrigerant (5) is led out of the container body (4).

[Problem to be solved by the invention] In the conventional cryogenic container configured as described above,
Since the first and second gas outlet pipes (6) and (10) are each bent in a U-shape on the way, three are provided for the first gas outlet pipe (6) and three for the second gas outlet pipe (10). It looks like two pipes are arranged side by side in appearance. On the other hand, since piping (not shown) for refrigerant injection and measurement is arranged inside the inner container (2), the arrangement of the piping in the inner container (2) becomes complicated. There was a problem that it would. Also, the first and second gas outlet pipes (6),
(10) must be arranged in a limited space in the inner container (2) in order to open each of the first and second regions (2a) and (2b). Since the space between the pipes is generated by bending the pipe in a U-shape in addition to the required pipe diameter, the whole becomes unnecessarily large, and the pipe becomes more difficult. there were.

The present invention has been made to solve the above-described problems, and can reduce the space for gas deriving means.
This facilitates the arrangement of the gas deriving means in the container body, and simplifies the appearance of the gas deriving means,
Accordingly, it is an object of the present invention to obtain a low-temperature container that can simplify the arrangement of the gas deriving means and the piping in the container body.

[Means for Solving the Problems] In a cryogenic container according to the present invention, a first opening is provided facing a first region, a first communication hole is provided in a second region, and a first gas is provided inside. A first flow path forming body forming a flow path;
A second flow path forming a second gas flow path surrounding the first flow path forming body and having a second communication hole provided in the first region, and forming a second gas flow path with the outer periphery of the first flow path forming body. And a second opening surrounding the body and the second flow path forming body, the second opening being provided facing the second region, forming a third gas flow path between the body and the outer periphery of the second flow path forming body. A drawer, one end of which is in communication with one of the first, second, and third gas flow passages, and the other end of which is drawn out of the container body to form a draw-out gas flow passage therein; And a gas deriving means having a portion.

[Operation] In the present invention, the gas-phase refrigerant that has entered the gas deriving means from the first and second openings passes through the gas flow passages formed in the respective flow passage formation bodies and from the drawer to the container. It is led out of the main body.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First
FIG. 1 is a sectional view showing a low-temperature container according to a first embodiment of the present invention. The same or corresponding parts as those in FIGS. 3 and 4 are denoted by the same reference numerals, and description thereof will be omitted.

In the figure, reference numeral (11) denotes a first pipe which is attached to the container body (4) as a first flow path forming body and forms a first gas flow path (21) therein, and a tip of the first pipe (11). A first opening (11a) opening toward the first region (2a) is provided in the portion (left end in the drawing) downward. Further, at the base end of the first pipe (11), a drawing part (11b) that forms a drawing gas flow path therein is integrally provided. Further, a first communication hole (11c) is provided in a portion of the first pipe (11) located in the second region (2b).

(12) is a second pipe forming a second gas flow path (22) between the outer circumference of the first pipe (11) and the second pipe surrounding the intermediate part of the first pipe (11) as a second flow path forming body. A second communication hole (12a) is formed in a portion of the second pipe (12) located in the first region (2a). The other end of the second pipe (12) is closed by a second pipe end cover (12b) through which the first pipe (11) penetrates. Further, the second gas flow path (22) communicates with the first gas flow path (21) only by the first communication hole (11c).

(13) is a third pipe forming a third gas flow path (23) between the outer circumference of the second pipe (12) and surrounding the entire outer circumference of the second pipe (12) as a third flow path forming body. The third pipe (13) is provided with a second opening (13a) that opens toward the second region (2b), facing downward. Both ends of the third pipe (13) are closed by third pipe end covers (13b) penetrated by the first pipe (11). Further, the third gas flow path (23) communicates with the second gas flow path (22) only by the second communication hole (12a).

(14) is a first gas outlet pipe composed of a first pipe (11), a second pipe (12), and a third pipe (13) as gas outlet means. Refrigerant (5
b) is led out of the container body (4). Also, the first and second
The third pipes (11), (12) and (13) are arranged concentrically at equal intervals in the radial direction.

In the cryogenic container configured as described above, when the liquid level of the liquid-phase refrigerant (5a) is horizontal, both the first and second openings (11a) and (13a) are in the gas-phase refrigerant (5b). Although it is open, the liquid level of the liquid-phase refrigerant (5a) is in the state of the solid line A,
When the gas-phase refrigerant (5b) moves to the first region (2a), the second opening (13a) is buried in the liquid-phase refrigerant (5a), and
Only the opening (11a) opens into the gas-phase refrigerant (5b). At this time, the vapor-phase refrigerant (5b) flows through the first opening (11a)
The gas passes through the gas flow path (21) and is led out of the container body (4) from the drawer (11b).

Conversely, the liquid level of the liquid-phase refrigerant (5a) changes to a state indicated by a broken line B,
When the gas-phase refrigerant (5b) moves to the second region (2b), only the second opening (13a) opens into the gas-phase refrigerant (5b). At this time, the gas-phase refrigerant (5b) that has entered the third pipe (13) from the second opening (13a) flows through the third gas flow path (23) to the opposite end, and From the communication hole (12a) to the second pipe (1
2), flows into the opposite end through the second gas flow path (22), enters the first pipe (11) through the second communication hole (11c), and flows out of the drawing section (11b). It is led out of the container body (4).

Thus, as in the conventional example, at least one of the first and second openings (11a) and (13a) is always open to the gas-phase refrigerant (5b). Even if acceleration / deceleration is performed, only the gas-phase refrigerant (5b) is led out of the container body (4), and is not led out as a liquid. Moreover,
Since there is no U-shaped bent part as in the past, each pipe (1
If the pipe diameters of 1), (12), and (13) are minimized, the first gas outlet pipe (14) can be replaced with the first gas outlet pipe (14) without occupying unnecessary space other than the gas flow path. Can also be reduced. Further, since the outer periphery of the intermediate portion is covered with the third pipe (13), the appearance of the first gas outlet pipe (14) is simpler than that of the conventional example.

In the above embodiment, the case where the inclination of the liquid surface of the liquid-phase refrigerant (5a) changes due to the acceleration / deceleration of the moving body is described. However, the present invention can be applied to the case where the inclination of the liquid surface changes due to vibration or the like. . For example, FIG. 2 shows the second embodiment of the present invention.
FIG. 3 is a cross-sectional view showing an embodiment of the present invention, wherein first and second openings (11a) and (13a) of a first gas outlet pipe (14) in FIG. Tube (15) first
It is installed in a direction perpendicular to the gas outlet pipe (14).

The second gas outlet pipe (15) has substantially the same configuration as the first gas outlet pipe (14), except that the extraction portion communicates with the second gas flow path. Further, in this case, the first gas outlet pipe (14) itself constitutes an outlet of the second gas outlet pipe (15).

In the container body (4) attached to a moving body such as a linear motor car, in addition to the liquid level change due to acceleration and deceleration as shown in FIG. It is also conceivable that the liquid level changes due to swaying (rolling) in the left-right direction in the figure. When this rolling occurs, the liquid level of the liquid-phase refrigerant (5a) changes between the solid line C and the broken line D in FIG. For this reason, if the first and second openings of the second gas outlet pipe (15) are arranged in the gas regions in the respective states of the solid line C and the broken line D, the refrigerant (5 ) Can be derived only.

In addition, by attaching such a second gas outlet pipe (15) to the first and second openings (11a) and (13a) of the first gas outlet pipe (14), the liquid caused by acceleration and deceleration of the moving body is provided. Not only the surface sway but also the liquid surface sway due to rolling can be covered at the same time. Needless to say, the second gas outlet pipe (15) may be provided with an independent outlet.

Further, in the above embodiment, the container body (4) has a hollow columnar shape attached to the moving body, but may be attached to other equipment and the shape is not particularly limited. Further, the container body does not have to have a two-layer structure.

Furthermore, in the above embodiment, the first, second and third pipes (11), (12), (1
Although 3) is shown, the first, second, and third flow path forming bodies may have other shapes, such as a box shape.

In the above embodiment, the lead portion (11b) is provided integrally with the first pipe (11), which is the first flow path forming member. However, the drawing portion may be provided integrally with another flow path forming member. The drawer may be a separate member.

Further, the refrigerant may be other than nitrogen and helium.

Furthermore, the shapes and numbers of the first and second openings and the first and second communication holes are not limited to those in the above-described embodiment.

[Effects of the Invention] As described above, the low-temperature container of the present invention includes a first flow path forming body, a second flow path forming body surrounding the first flow path forming body, and a third flow path surrounding the first flow path forming body. A road forming body;
Since the gas deriving means is constituted by the drawer, the space for the gas deriving means can be reduced, thereby facilitating the arrangement of the gas deriving means in the container body, and simplifying the appearance of the gas deriving means. Accordingly, there is an effect that the arrangement of the gas deriving means and the piping in the container body can be simplified.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a cryogenic container according to a first embodiment of the present invention, FIG. 2 is a sectional view showing a second embodiment of the present invention, and FIG. 3 is a sectional view showing an example of a conventional cryogenic container. Figure, 4th
The figure is a sectional view showing another example of the conventional low-temperature container. In the figure, (2a) is the first area, (2b) is the second area,
(4) is a container body, (5a) is a liquid-phase refrigerant, (5b) is a gas-phase refrigerant, (11) is a first pipe (first flow path forming body), (11a) is a first opening, (11b) ) Is the drawer, (11c) is the first communication hole,
(12) is the second pipe (second flow path forming body), (12a) is the second pipe
The communication hole, (13) is the third pipe (third flow path forming body), (13)
a) is the second opening, (14) is the first gas outlet pipe (gas outlet means), (15) is the second gas outlet pipe (gas outlet means),
(21) is the first gas flow path, (22) is the second gas flow path, (23)
Is a third gas flow path. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

(57) [Claims] 1. A container main body for containing a liquid-phase refrigerant and a gas-phase refrigerant in which the liquid-phase refrigerant is vaporized, and the liquid-phase refrigerant is attached to the container main body, and the inclination of the liquid surface of the liquid-phase refrigerant changes to change the gas phase. While the position of the refrigerant changes between the first region and the second region, at least one of the first and second openings is arranged so as to always open toward the gas-phase refrigerant. Having a gas deriving means for guiding the gas-phase refrigerant out of the container body, wherein the gas deriving means is provided with the first opening facing the first region,
A first communication hole is provided in the second region, a first flow path forming body that forms a first gas flow path therein, and the first flow path forming body surrounds the first flow path forming body, and is provided in the first region. A second communication passage formed between the first gas passage and the outer periphery of the first gas passage forming body, the second gas passage being connected to the first gas passage by the first communication hole. The second communication hole is provided between the formed body and the second flow path forming body, wherein the second opening is provided so as to face the second area, and the outer periphery of the second flow path formed body. A third gas flow path forming body that forms a third gas flow path communicated with the second gas flow path by the first and second gas flow paths;
And a third gas flow path, the other end of which is drawn out of the container body, and a drawer section inside which forms a drawing gas flow path.