JP5943213B2 - Liquefied gas container - Google Patents

Description

  The present invention relates to a liquefied gas container that is filled with liquefied gas, evaporates by receiving vaporization heat supplied from the container wall surface, and takes out the gas generated by the evaporation.

  For example, liquefied gas containers filled with liquefied gas such as LP gas (propane gas) are widely used. This liquefied gas container has a structure in which liquefied gas is filled inside, evaporates upon receiving vaporization heat supplied from the container surface, and the gas generated by the evaporation is taken out of the container and consumed. Yes. Hereinafter, an LP gas container filled with LP gas will be described.

  1 and 2 are longitudinal sectional views showing the structure of a conventional LP gas container. This LP gas container is a container designed to be filled with 50 kg of LP gas. FIG. 1 and FIG. 2 show that LP gas containers are filled with specified LP gas amounts of 100% (50 kg) and 30% (15 kg), respectively. The state where the gas is taken out from the container and consumed is shown.

  The LP gas container 1A is a pressure container having a strength sufficient to withstand the high pressure because the inside of the LP gas container 1A becomes a high pressure as the filled LP gas 50 is evaporated.

  This LP gas container 1A includes a celestial mirror 20 that covers the top, a ground mirror 30 that covers the bottom, and a body 40 that connects the celestial mirror 20 and the ground mirror 30 and surrounds the surroundings. A valve 21 is attached to the celestial mirror 20. The valve 21 is an outlet for LP gas filled in the container, but is also used as a gas inlet for injecting LP gas into the container.

  A skirt 31 for stably standing the LP gas container 1A is fixed to the ground mirror 30 of the LP gas container 1A.

  The LP gas filled in the LP gas container 1A is taken out and consumed as indicated by an arrow B by opening the valve 21. At this time, the LP gas filled in the LP gas container 1A evaporates with boiling. In order to continuously consume LP gas, it is necessary to continue evaporation. For this purpose, it is necessary to supply heat of vaporization necessary for evaporation from the wall surface of the container as indicated by an arrow A. Here, the amount of heat supplied to the LP gas 50 through the vessel wall surface is determined by the difference between the outside air temperature and the liquid temperature of the LP gas 50, the area of the portion of the vessel wall surface where the liquid LP gas 50 is in contact, and the like. Is done.

  In general usage, it is necessary to maintain the gas pressure in the container so that it does not fall below 0.07 MPa. However, when the remaining amount of LP gas 50 in the container decreases, contact between the liquid in the container and the container wall surface will occur. Since the area decreases, the supply of vaporization heat from the container wall surface decreases, and the gas pressure tends to decrease. For this reason, it is common to design the number of installations and the like so that a necessary gas pressure can be obtained under adverse conditions of the residual gas amount of about 30% shown in FIG.

  However, under severe conditions where the outside air temperature is low and the amount of gas consumed per unit time is large, it is difficult to maintain the necessary gas pressure, especially when the residual gas amount decreases.

  Here, Patent Documents 1 and 2 disclose that a bypass path that passes through the outside of the container is formed, heat transfer fins are provided in the bypass path, and heat of the outside air is supplied to the liquefied gas that passes therethrough. .

  Patent Documents 3 and 4 disclose that a foam or a capillary is placed inside the gas and the contact area between the liquefied gas and the container wall surface is increased by utilizing a capillary phenomenon.

  Further, in Patent Document 5, a double container of an outer container and an inner container is formed, and a hole for ejecting a gaseous gas generated by evaporation is formed at the upper end of the inner container, and the liquefied gas is allowed to flow out at the lower end. A liquefied gas container having a hole is disclosed.

JP 2000-88192 A Japanese Patent Laid-Open No. 2002-2296 JP 11-63394 A No. 4-134997 JP2013-60972A

  The proposal for forming the bypass path disclosed in Patent Documents 1 and 2 is applicable to a fixed installation type bulk storage tank, but in the case of a portable gas container such as an LP gas container, the bypass path is installed. Is difficult. In particular, in the case of an LP gas container that has been used in the past as shown in FIGS. 1 to 2, only one place is provided with a gas injection / outlet at the top, and the LP gas container It is impossible to install a bypass with compatibility.

  Moreover, the proposal which arrange | positions a foam and a hair-like body disclosed by patent document 3, 4 inside a gas container cannot be applied to containers, such as a LP gas container. In the case of an LP gas container, the container is manufactured through a welding process. For this reason, it is necessary to perform annealing by heating the container to a high temperature and cooling it. Therefore, only a material having heat resistance sufficient to withstand the annealing can be arranged inside the container. Further, even a material that can withstand annealing needs to be durable enough to withstand long-term use thereafter.

  The proposal of the double container disclosed in Patent Document 5 is effective when the remaining amount of the liquefied gas is reduced, but can further improve the evaporation capability when the remaining amount of the liquefied gas is large. desired.

  In view of the above circumstances, an object of the present invention is to provide a liquefied gas container that can take in heat of vaporization with high efficiency while maintaining compatibility with a conventional container.

The liquefied gas container of the present invention that achieves the above object is a liquefied gas container that is filled with a liquefied gas, evaporates upon supply of vaporization heat from the container wall surface, and takes out the gas generated by the evaporation.
A celestial mirror with a valve attached to the top, a geoscope that covers the bottom, and a trunk that surrounds the celestial mirror and surrounds it, and is filled with liquefied gas. When,
An interior body arranged in the exterior container,
The inner body has an inner cylinder that extends in the circumferential direction while facing the trunk with a space between the inner cylinder and the inner cylinder and extends in the vertical direction. A ground plate that is continuous with the lower partition of the inner cylinder and that covers the lower part of the inner cylinder with a space between the ground mirror and extends along the ground mirror. And
A first flow path that vertically penetrates the partition plate and ejects gas generated by evaporation of liquefied gas existing below the partition plate in the inner cylinder to the upper portion of the partition plate ;
On the side of the partition plate above the partition plate, the inner cylinder penetrates inward and outward, and the liquefied gas existing above the partition plate in the inner cylinder remains in the liquid state outside the inner cylinder. A second flow path to flow out ;
On the celestial side, a third flow path that connects the space sandwiched between the inner cylinder and the body and the inner cylinder inner side above the partition plate ;
The geoscope side has a fourth channel that connects a space sandwiched between the inner cylinder and the body and an inner cylinder inner side lower than the partition plate, and the fourth flow The road is characterized by penetrating up and down the base plate .

  Here, in the liquefied gas container of the present invention, the fourth flow path is formed in which the interior body is spaced from the ground mirror and extends along the ground mirror and continues to the lower edge of the inner cylinder. It is preferable to have a ground plane.

  Furthermore, in the liquefied gas container of the present invention, it is preferable that the fourth channel is a channel opened at the lowermost part of the interior body.

  Furthermore, in the liquefied gas container of the present invention, it is also a preferable aspect to include an opening / closing valve that opens the second opening in a state where the filling amount of the liquefied gas is large and closes in the middle of the filling amount decreasing.

  According to the liquefied gas container of the present invention, when the filling amount of the liquefied gas is large, mainly the liquefied gas is circulated in the upper part of the partition plate so that the heat of vaporization is efficiently taken in. When the remaining amount decreases, the liquefied gas below the partition plate rises along the wall surface of the fuselage, and the heat of vaporization is efficiently taken in, thereby promoting the evaporation of the gas liquid. Further, according to the liquefied gas container of the present invention, the outer container can be formed in the same shape as the conventional container, and compatibility with the conventional container is maintained.

It is the longitudinal cross-sectional view which showed the structure of the conventional LP gas container. It is the longitudinal cross-sectional view which showed the structure of the conventional LP gas container. It is a longitudinal cross-sectional view of the LP gas container as 1st Embodiment of the liquefied gas container of this invention. It is the figure which showed the behavior at the time of gas consumption in the LP gas container as 1st Embodiment shown in FIG. It is the figure which showed the behavior at the time of gas consumption in the LP gas container as 1st Embodiment shown in FIG. It is the figure which showed the behavior at the time of gas consumption in the LP gas container as 1st Embodiment shown in FIG. It is a longitudinal cross-sectional view of the LP gas container as 2nd Embodiment of the liquefied gas container of this invention. It is a longitudinal cross-sectional view of the LP gas container as 3rd Embodiment of this invention. FIG. 9 is an enlarged schematic diagram of a portion indicated by a circle R in FIG. 8.

  Embodiments of the present invention will be described below.

  FIG. 3 is a longitudinal sectional view of an LP gas container as a first embodiment of the liquefied gas container of the present invention. In FIG. 3 and each figure after FIG. 4 to be described later, the constituent elements corresponding to the constituent elements of the conventional LP gas container shown in FIGS. It attaches | subjects and shows the same code | symbol.

  The LP gas container 1B as the first embodiment shown in FIG. 3 is an LP gas container that is filled with LP gas, evaporates upon receiving supply of vaporization heat from the container wall surface, and takes out the gas generated by the evaporation, It has the exterior container 10 and the interior body 60 arrange | positioned inside the exterior container 10.

  The exterior container 10 includes a celestial mirror 20, a ground mirror 30, and a body 40. The celestial mirror 20, the ground mirror 30, and the fuselage 40 constituting the exterior container 10 have the same configurations as the celestial mirror 20, the ground mirror 30, and the fuselage 40 of the conventional LP gas container 1A shown in FIGS. Is. That is, the celestial mirror 20 covers the top, and a valve 21 is attached to the celestial mirror 20. The ground mirror 30 covers the bottom. Furthermore, the fuselage 40 connects the celestial mirror 20 and the ground mirror 30 and surrounds the periphery. The exterior container 10 including the celestial mirror 20, the ground mirror 30, and the body 40 is filled with LP gas.

  The interior body 60 disposed inside the exterior container 10 includes an inner cylinder 70, a ground plate 80, and a partition plate 90. The inner cylinder 70 is a cylindrical member that extends in the circumferential direction and extends in the up-down direction while facing the body 40 with a space between the inner cylinder 70 and the body 40. The ground plane 80 is a member that extends along the ground mirror 30 and is continuous with the lower edge of the inner cylinder 70 with a space between the ground plane 30 and the ground plane 30. Furthermore, the partition plate 90 is a plate-like member that partitions the inner side of the inner cylinder 70 vertically at an intermediate position in the vertical direction of the inner cylinder 70.

  The interior body 60 composed of the inner cylinder 70, the base plate 80, and the partition plate 90 is fixed at a position that is coaxial with the exterior container 10 via support members 101 and 102 that are installed at four locations in the circumferential direction in the upper and lower directions. Has been.

  The interior body 60 composed of the inner cylinder 70, the base plate 80, and the partition plate 90 is a structure that can withstand high pressure, such as the exterior container 10, because LP gas exists both inside and outside the interior body 60. There is no need, and the outer container 10 may be made of a thin plate material. The reduction in the volume inside the exterior container 10 due to the placement of the interior body 60 in the exterior container 10 is only the thick volume of the interior body 60, and is small. As shown in the LP gas container 1A in FIG. 1, the exterior container 10 has a sufficient capacity even when it is filled with the prescribed 100% (50 kg) LP gas. Even if the LP gas container 1B shown in FIG. 4 has the same configuration and the same structure as the conventional LP gas container 1A shown in FIGS. It is possible to fill the same amount of LP gas as the LP gas container 1A. That is, the LP gas container 1B shown in FIG. 3 is compatible with the conventional LP gas container 1A shown in FIGS.

  Here, the partition plate 90 is formed with a gas jet port 91 penetrating vertically in the center thereof. In the present embodiment, the gas jet port 91 is a small hole of 0.8 mmφ, and the partition plate is mainly used to generate gas generated by evaporation of LP gas existing below the partition plate 90 in the inner cylinder 70. It plays the role of spouting above 90. The gas ejection port 91 corresponds to an example of the first flow path referred to in the present invention.

  In addition, a liquid circulation port 71 penetrating the inside and outside of the inner cylinder 70 is formed at the partition plate 90 side above the partition plate 90 of the inner cylinder 70, in this embodiment, at a position immediately above the partition plate 90. Yes. In the present embodiment, the liquid circulation port 71 is a hole having a size of 2.5 mmφ, and is formed at four locations in the circumferential direction. The liquid circulation port 71 mainly plays a role of causing the LP gas existing above the partition plate 90 in the inner cylinder 70 to flow out of the inner cylinder 70 while being in a liquid state. In a state where the valve 21 is opened, the LP gas that has flowed out of the inner cylinder 70 from the liquid circulation port 71 receives the heat of vaporization from the body 40 in a space between the body 40 and the inner cylinder 70 and boils. Accompanying this, the gas that has risen as a gas-liquid two-phase flow and has evaporated is taken out from the valve 21 to the outside. Since the liquefied gas in the gap between the inner cylinder 70 and the fuselage 40 becomes a gas-liquid two-phase flow, it boils vertically upward and the liquefied gas in the gap is pushed up to a higher position. The heat exchange efficiency is further improved by the stirring effect by boiling. Then, the LP gas still rising in the liquid state passes through the upper edge 70a of the inner cylinder 70 and flows into the inner cylinder 70, whereby the LP gas is circulated. The liquid circulation port 71 formed in the inner cylinder 70 corresponds to an example of a second flow path according to the present invention. Further, the flow path passing over the upper edge 70a of the inner cylinder 70, that is, the flow path connecting the inner side of the inner cylinder 70 and the space sandwiched between the inner cylinder 70 and the body 40 on the side of the celestial mirror 20, This corresponds to an example of the third flow path according to the present invention.

  A liquid outlet 81 is formed at the lowermost part of the interior body 60, that is, at the lowermost part of the main plate 80. The liquid outlet 81 is a flow path that connects the inside of the inner cylinder 70 and the space sandwiched between the inner cylinder 70 and the body 40 on the ground mirror 30 side, and is the fourth flow path referred to in the present invention. It corresponds to an example. In the present embodiment, the liquid outlet 81 is a 10 mmφ hole. The liquid outlet 81 mainly plays a role of causing the LP gas existing inside the inner cylinder 70 and below the partition plate 90 to flow out of the inner cylinder 70 in a liquid state. When the valve 21 is opened in a state where the amount of the filled LP gas is small, the pressure in the space above the partition plate 90 decreases. Since the gas outlet 91 has a very small diameter hole (0.8 mmφ in the example of the present embodiment), the amount of gas ejected from the gas outlet 91 is very small to fill the pressure drop in the upper space. Is not reached. For this reason, LP gas flows out from the liquid outlet 81 on the ground mirror 30 side, and the LP gas rises in the space sandwiched between the inner cylinder 70 and the body 40. Then, by the rise, it contacts the wide area of the body 40, receives the heat of vaporization from the body 40, evaporates actively, and the vaporized gas is taken out from the valve 21 to the outside.

  Here, as an example, the outer container 10 constituting the LP gas container 1B has a vertical dimension of 1235 mm and an outer diameter dimension of about 370 mmφ, and the inner body 60 has a vertical dimension of 880 mm and an outer diameter dimension of about 320 mmφ. Moreover, the clearance gap between the exterior container 10 and the interior body 60 is about 20 mm.

  4 to 6 are diagrams showing the behavior when the gas is consumed in the LP gas container as the first embodiment shown in FIG. However, in these FIGS. 4-6, illustration is simplified about FIG. 3 about the LP gas container.

  4 shows a state where the LP gas filling amount is close to 100%, FIG. 5 shows a state where the LP gas filling amount is about 80%, and FIG. 6 shows a state where the LP gas filling amount is about 30%.

  When the LP gas filling amount shown in FIG. 4 is close to 100% and the liquid level 50a of the LP gas 50 is higher than the upper edge 70a of the inner cylinder 70 of the interior body 60, the conventional type shown in FIG. It shows almost the same behavior as the LP gas container 1A. In this state, both the conventional LP gas container 1A shown in FIG. 1 and the LP gas container 1B of the present embodiment receive sufficient heat of vaporization because the LP gas 50 is in contact with a large area of the outer container 10. be able to. However, in the case of the conventional LP gas container 1A, the liquid rises together with the vaporized gas that absorbs heat on the side close to the fuselage 40, and a circulation occurs in which the liquid descends in the central portion away from the fuselage 40. In the case of the LP gas container 1 </ b> B of the first embodiment, the circulation path is such that the liquid rises in the space sandwiched between the inner cylinder 70 and the body 40 and the liquid descends inside the inner cylinder 70.

  As shown in FIG. 5, when the liquid level 50a of the LP gas 50 is lowered below the upper edge 70a of the inner cylinder 70, the LP gas 50 is only up to the level of the liquid level in the case of the conventional LP gas container 1A. Although not in contact with the container, in the case of the LP gas container 1B of the present embodiment, it passes between the inner cylinder 70 and the body 40 and becomes a gas-liquid two-phase flow and rises higher than the liquid level 50a inside the inner cylinder 70. To do. When the LP gas rises to the upper edge 70a of the inner cylinder 70, it falls over the upper edge 70a and falls inside the inner cylinder 70. As described above, in the case of the LP gas container 1B of the present embodiment, the heat of vaporization can be received from a large area of the body 40 by contacting the body 40 up to a position higher than the original liquid level 50a of the LP gas 50. That is, in the case of the LP gas container 1B of the present embodiment, the heat of vaporization is taken in with high efficiency even when the amount of the LP gas 50 filled is considerably larger than that of the conventional LP gas container 1A.

  As shown in FIG. 6, when the liquid level 50 a of the LP gas 50 is lowered below the partition plate 90, the heat from the outside is not directly transmitted to the interior of the interior body 60, so the LP gas inside the interior body 60. 50 remains cold. Inside the interior body 60, even in the cold state, the evaporated gas is ejected upward from the gas ejection port 91, and the gas ejection port 91 is an extremely small hole (0.8 mmφ) and ejects therethrough. The amount of gas is small. For this reason, the pressure drop in the upper part of the container due to the gas being taken out through the valve 21 cannot be compensated, and the partition plate 90 is lower than the pressure in the space below the partition plate 90 inside the interior body 60. The pressure in the space above is increased. In order to compensate for this, LP gas flows out from the liquid outlet 81 at the bottom, and the outflowed LP gas passes through the gap between the inner cylinder 70 and the body 40 and rises to a considerably high position. The LP gas in the gap vigorously receives heat from the body 40 and evaporates to flow out of the valve 21 as a gaseous gas.

  Thus, in the case of the LP gas container 1B of the present embodiment, even when the remaining amount of the LP gas 50 is small, the LP gas 50 contacts over a wide area of the body 40, so that the heat of vaporization is taken in with high efficiency. be able to. On the other hand, in the case of the conventional LP gas container 1A shown in FIG. 1, when the liquid level is lowered to the same level as that shown in FIG. 6, as shown in FIG. Heat can only be received from a portion of the area, resulting in increasingly less efficient heat capture.

  FIG. 7 is a longitudinal sectional view of an LP gas container as a second embodiment of the present invention. Also in FIG. 7, the LP gas container is shown in a simplified manner.

  The LP gas container 1C shown in FIG. 7 is an interior body 60 'without the base plate 80 in the LP gas container 1B shown in FIG. 3 when compared with the LP gas container 1B shown in FIG. That is, the interior body 60 ′ of the LP gas container 1 </ b> C shown in FIG. 7 includes the inner cylinder 70 and the partition plate 90.

  In the case of this LP gas container 1C, the opening surrounded by the lower edge 70b of the inner cylinder 70 corresponds to an example of the fourth flow path referred to in the present invention.

  The behavior of the LP gas container 1C is basically the same as that of the LP gas container 1B of the first embodiment described above.

  In the case of the LP gas container 1C shown in FIG. 7, as compared with the LP gas container 1B of the first embodiment described above, the portion of the flow path passing through the gap between the interior body 60 ′ and the exterior container 10 is shortened. Although the efficiency may be lowered, since the base plate 80 is unnecessary, the manufacturing cost can be reduced and the weight can be reduced.

  FIG. 8 is a longitudinal sectional view of an LP gas container as a third embodiment of the present invention.

  The LP gas container 1D shown in FIG. 8 is provided with an opening / closing valve 72 for opening and closing a liquid circulation port 71 formed at a position immediately above the partition plate 90 when compared with the LP gas container 1B shown in FIG. Only the difference is. The on-off valve 72 is provided in association with the liquid circulation port 71. That is, when the liquid circulation ports 71 are formed at four locations in the circumferential direction of the inner cylinder 70, the on-off valves 72 are also provided at four locations in the circumferential direction in association with the liquid circulation ports 71.

  FIG. 9 is an enlarged schematic view of a portion indicated by a circle R in FIG.

  FIG. 9A shows a state where the filling amount of the liquefied gas 50 is large and the liquefied gas 50 exists above the partition plate 90 in the inner cylinder 70, for example, as in FIG. . On the other hand, in FIG. 9B, the filling amount of the liquefied gas 50 is reduced to the level shown in FIG. 6, for example, and almost no liquefied gas 50 remains on the partition plate 90 of the inner cylinder 70. Indicates the state.

  The on-off valve 72 is a valve that opens the liquid circulation port 71 in a state where the filling amount of the liquefied gas is large and closes in the middle of the filling amount decreasing. The on-off valve 72 is in an open state when the liquefied gas is accumulated above the partition plate 90 in the inner cylinder 70, and is on the upper side of the partition plate 90 in the inner cylinder 70. When the filling amount is reduced to a state where almost no liquefied gas remains, it is preferably in a closed state. However, the on-off valve 72 may be closed in a state where the filling amount is slightly larger than that, or may be opened to a state where the filling amount is slightly smaller than that.

  When the liquefied gas 50 exists above the partition plate 90 of the inner cylinder 70, it is necessary to circulate the liquefied gas 50 existing above the partition plate 90, and the liquid circulation port 71 is opened. (FIG. 9A). On the other hand, when the liquefied gas 50 hardly exists above the partition plate 90 of the inner cylinder 70, the on-off valve 72 is closed. In the case of the LP gas container 1A of the first embodiment or the LP gas container 1B of the second embodiment described above, when the liquefied gas 50 hardly exists above the partition plate 90, the inner cylinder 70 and the fuselage The liquefied gas that has risen through the gap with the gas 40 flows into the inner cylinder 70 from the liquid circulation port 71, and the evaporation efficiency tends to decrease to that extent. In contrast, in the case of the LP gas container 1D of the third embodiment, the liquefied gas that has risen through the gap between the inner cylinder 70 and the body 40 is prevented from flowing into the inner cylinder 70 from the liquid circulation port 71. Therefore, the heat of vaporization is taken in more efficiently.

  Here, the opening / closing principle of the opening / closing valve is not limited to a specific one. For example, the opening / closing valve is opened by the pressure of the liquefied gas 50 accumulated above the partition plate 90 in the inner cylinder 70, and the inner cylinder When almost no liquefied gas 50 remains on the partition plate 90 in 70, the gap between the inner cylinder 70 and the body 40 is pushed and closed by the liquefied gas rising. Good. Alternatively, the on-off valve 72 may be formed of a thermostat or a shape memory alloy that deforms by capturing a temperature difference between when the liquefied gas 50 is accumulated on the partition plate 90 of the inner cylinder 70 and when it is not accumulated. Good.

  In the description of the LP gas container 1B of the first embodiment, the dimensions of the exterior container 10 and the interior body 60 are shown, but these are merely examples, and the present invention is also applicable to LP gas containers of other dimensions. It is possible to apply with compatibility with products.

  In the description of the LP gas container 1B of the first embodiment, the gas outlet 91 is provided with a 0.8 mmφ hole, and the liquid circulation port 71 provided in the inner cylinder 70 is provided with 4 mmφ holes × 4 on the main plate 80. The liquid outlet 81 has been described as having a 10 mmφ hole, and the gap between the inner body 60 and the outer container 10 is about 20 mm, but these are only examples, and the size and shape of the LP gas container, An appropriate hole diameter and gap size may be selected according to the region, environment, etc. where LP gas filled in the LP gas container is used. Moreover, although the example in which only one small hole is formed in the gas ejection port 91 is shown, a plurality of holes may be formed at different positions of the partition plate 90. Alternatively, the hole diameter may be expanded by using a multistage orifice.

  Furthermore, although the LP gas container has been described as an example here, the present invention is not limited to the LP gas container, and is generated by the evaporation of the liquefied gas filled with the supply of vaporization heat from the container wall surface. The present invention can be widely applied to a liquefied gas container for taking out the generated gas.

1A, 1B, 1C, 1D LP gas container 10 exterior container 20 celestial mirror 21 valve 30 ground mirror 31 skirt 40 fuselage 50 LP gas 60, 60 'interior body 70 inner cylinder 71 liquid circulation port 72 on-off valve 80 base plate 81 liquid outflow path 90 Partition 91 Gas outlet 101, 102 Support member

Claims (4)

In a liquefied gas container that is filled with liquefied gas and receives vaporization heat from the vessel wall surface to evaporate and take out the gas generated by the evaporation,
A celestial mirror with a valve attached to the top, a geoscope that covers the bottom, and a trunk that surrounds the celestial mirror and surrounds it, and is filled with liquefied gas. When,
An interior body arranged in the exterior container,
The inner body has an inner cylinder that extends in the circumferential direction while facing the trunk with a space between the inner cylinder and the inner cylinder and extends in the vertical direction. A ground plate that is continuous with the lower partition of the inner cylinder and that covers the lower part of the inner cylinder with a space between the ground mirror and extends along the ground mirror. And
A first flow path that vertically penetrates the partition plate and ejects gas generated by evaporation of liquefied gas existing below the partition plate in the inner cylinder to the upper portion of the partition plate ;
On the side of the partition plate above the partition plate, the inner cylinder penetrates inward and outward, and the liquefied gas existing above the partition plate in the inner cylinder remains in the liquid state outside the inner cylinder. A second flow path to flow out ;
On the celestial side, a third flow path that connects the space sandwiched between the inner cylinder and the body and the inner cylinder inner side above the partition plate;
On the geoscope side, the space between the inner cylinder and the fuselage, and a fourth flow path connecting the inner cylinder inner side below the partition plate,
The liquefied gas container, wherein the fourth flow path vertically penetrates the base plate . The interior body is configured in a shape that does not have the ground plane,
The liquefied gas container according to claim 1, wherein the fourth flow path is an opening surrounded by the lower edge of the inner cylinder. The third flow path, liquefied gas container according to claim 1 or 2, characterized in that it is formed between said inner cylinder upper edge and the outer container inner surface. Wherein the second flow path, any one of claims 1 to 3, characterized in that it comprises an on-off valve which closes in the middle stage of open filling amount has come down in filling amount is state of the liquefied gas 1 The liquefied gas container according to item.

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