JPH0743599Y2 - Liquefied gas storage container - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a storage container for storing a cryogenic liquid such as liquid hydrogen.

[0002]

2. Description of the Related Art A conventional liquefied gas storage container has a double wall structure in which a closed double wall space is formed into a vacuum, so that heat input from the outside of the container is blocked by vacuum heat insulation. The vaporization of the liquefied gas was suppressed.

[0003]

However, since the conventional closed heat insulating container is formed of stainless steel, there is a problem that the inside of the container cannot be observed from the outside. In addition, when the inside of the closed heat insulating container is kept at an ultra-low temperature such as liquid helium temperature or liquid hydrogen temperature, a temperature difference of 280 degrees or more occurs between the inner temperature and the outer temperature of the closed heat insulating container, so that a vacuum of one layer is formed. There is a problem that the liquefied gas is unnecessarily consumed because the heat insulation alone cannot sufficiently insulate the heat and vaporization of the stored liquefied gas cannot be suppressed sufficiently. The present invention has been made by paying attention to such a point.Although the inside of the liquefied gas storage container can be observed from the outside, the heat input to the liquefied gas storage container is surely suppressed, and the liquefied gas is liquefied. An object of the present invention is to provide a liquefied gas storage container that does not waste gas.

[0004]

In order to achieve the above object, the present invention provides a liquefied gas storage container having a double-walled glass outer container and a double-walled structure in which the liquefied gas storage container is disposed inside the glass outer container. It is composed of a glass inner container, and the outer wall of the inner container is arranged at regular intervals on the inner wall of the outer container.
Liquid nitrogen is enclosed in the heavy wall space, and liquid helium is filled in the double wall space of the inner container.

[0005]

In the present invention, the liquefied gas storage container is a glass outer container having a double wall structure, and a liquefied gas storage container is disposed inside the outer container.
It is composed of a glass inner container having a double-walled structure, the outer wall of the inner container is arranged at regular intervals on the inner wall of the outer container, and liquid nitrogen is enclosed in the double-wall space of the outer container. Since the heavy wall space is filled with liquid helium, the inside of the liquefied gas storage container can be easily observed from the outside. Further, since the liquid nitrogen temperature from the outer container acts on the inner container that stores the liquefied gas, and the inner container itself is cooled to the liquid helium temperature, the amount of heat input to the inside of the container is The amount of heat that is suppressed and acts on the stored liquefied gas is reduced.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings show an embodiment of the present invention. FIG. 1 is an overall longitudinal sectional view, FIG. 2 is an enlarged view of an outer container supporting portion, and FIG. 3 is an enlarged view of an inner container supporting portion. Reference numeral (1) in the figure denotes a gantry that can move on the floor surface (2), and a liquefied gas storage container (3) made of glass is supported on the gantry (1).

The liquefied gas storage container (3) is composed of two inner and outer containers (4) and (5) formed in a double wall structure made of glass, and the inner container (4) is the outer container (5). ) Is arranged in a state of maintaining a constant interval. And the outer container
Liquid nitrogen is enclosed in the double wall space of (5), and liquid helium is filled in the double wall space of the inner container (4).

As shown in FIG. 2, the upper end portion of the outer container (5) is fixed to the upper wall portion of the pedestal (1) with a fixing band (6). The fixing band (6) includes a clamping ring (8) whose one end is fixed to the upper wall (7) of the gantry (1), and a clamping band (9) fitted to the outer peripheral surface of the clamping ring (8). Consists of
A packing (10) is placed between the pinching ring (8) and the outer container (5).
Is installed.

As shown in FIG. 3, the upper end portion of the inner container (4) is fixed to the upper wall portion of the pedestal (1) with a fixing band (11). The fixing band (11) has a clamp ring (1) whose one end is fixed to a support base (12) protruding upward from the upper wall (7) of the base (1).
3), the clamping ring (15) whose one end is fixed to the holding table (14) suspended and fixed to the supporting table (12), and the clamping rings (13) and (15), respectively. The tightening bands (16) and (17) are provided, and a common packing (18) is interposed between the pinching rings (13) and (15) and the inner container (4).

The upper end opening of the inner container (4) is a cover plate.
The lid plate (19) is closed.The transfer tube connection port (20) is formed in this lid plate (19), and the gas vent passage (2
1) is connected. Further, a densitometer (22) is arranged inside the inner container (4) with a cover plate (19) suspended. Reference numeral (23) in the figure is an on-off valve arranged in the gas vent passage (21),
(24) is a safety valve, (25) is a pressure gauge, and (26) is the inner container (4) 2
A charging / discharging cock for filling liquid helium between the heavy walls and discharging vaporized helium gas.

In the liquefied gas storage container having the above-mentioned structure, liquid nitrogen is enclosed in the inter-wall space of the outer container (5) formed in the double wall structure and the inner container formed in the double wall structure. Since the space between the walls of (4) is filled with liquid helium, an intermediate temperature layer between the ambient temperature and the outside air temperature in the inner container (4) is formed between the inner and outer containers, and the inner container ( The amount of heat input to 4) decreases, and the vaporization rate of the liquefied gas stored in the inner container (4) decreases. This reduces wasteful vaporization of the liquefied gas and allows the liquefied gas to be stored for a long time.

[0012]

According to the present invention, the liquefied gas storage container is composed of a glass outer container having a double wall structure and a glass inner container having a double wall structure disposed inside the outer container. Place the outer wall on the inner wall of the outer container at regular intervals,
Since liquid nitrogen is enclosed in the double wall space of the outer container and liquid helium is filled in the double wall space of the inner container, the inside of the liquefied gas storage container can be easily observed from the outside. , Various measurement work such as low temperature physical property test,
It can be performed directly in the liquefied gas storage container without transferring the liquefied gas to a measuring device or the like.

Since the liquid nitrogen temperature from the outer container acts on the inner container storing the liquefied gas, and the inner container itself is cooled to the liquid helium temperature,
The amount of heat input to the inside of the container will be suppressed, the amount of heat acting on the liquefied gas stored in the container will be reduced, and wasteful vaporization of the liquefied gas will be suppressed to improve storage efficiency. You can

[Brief description of drawings]

FIG. 1 is an overall vertical sectional view.

FIG. 2 is an enlarged view of an outer container support portion.

FIG. 3 is an enlarged view of an inner container support portion.

[Explanation of symbols]

 4 ... inner container, 5 ... outer container,

Claims (1)

[Scope of utility model registration request] 1. A glass outer container (5) having a double wall structure,
A glass inner container (4) having a double wall structure disposed inside the outer container (5), and the inner container (4) is replaced by the outer container.
Liquid nitrogen is filled in the double-wall space of the outer container (5) with a certain interval in (5), and liquid helium is filled in the double-wall space of the inner container (4). Storage container.