JPH10299991A - Liquefied gas cylinder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To jet and discharge most of liquidfied gas in a gas cylinder in a liquid state even under micro gravity by providing a partition arranged in an axially slidable state inside the gas cylinder having a master valve on the outlet side and used in space, under micro gravity, or the like. SOLUTION: A master valve 2 is provided at an outlet (a) at one end of a liquefied gas cylinder 1, and a partition 3 of cylindrical shape with the master valve 2 side made a conical closed end is arranged inside the liquefied gas cylinder 1 slidably in an axial direction. When the liquefied gas cylinder 1 is charged with liquefied gas 4, the partition 3 is arranged at the end far from the master valve 2, and liquefied gas 5 is packed on the open end side of the partition 3 so as to have gas 7 in the partition 3. At the time of use, in case of taking out the liquefied gas 4 in the liquefied gas cylinder under micro gravity, the master valve 2 is opened. Then the gas 7 in the partition 3 is expanded to move the partition 3, and the liquefied gas 4 is jetted in a liquid state from the outlet (a).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquefied gas cylinder used in space or under microgravity.

[0002]

2. Description of the Related Art FIG. 2 shows a conventional liquefied gas cylinder. Main valve 2 having siphon pipe 6 at one end of liquefied gas cylinder 1
Is installed. Liquefied gas 4 in liquefied gas cylinder 1
Is filled.

On the ground, the liquefied gas 4 accumulates below due to gravity. When the main valve 2 is opened, the liquefied gas 4 is pushed by the upper gas 7 and is sent upward from the inlet 8 of the siphon pipe 3 and is ejected in a liquid form from the outlet a.

[0004]

In the above conventional mechanism,
It works well under gravity, but has the following problems under microgravity.

The liquefied gas 4 does not always accumulate below the gas cylinder 1. Therefore, the inlet 8 of the siphon pipe 3 cannot always be kept at the position where the liquefied gas 4 exists in the gas cylinder 1, and the injection of the liquefied gas from the main valve 2 in a liquid state cannot be performed. This is likely to occur when the amount of the liquefied gas 4 in the gas cylinder 1 decreases.

[0006]

The present invention employs the following means to solve the above-mentioned problems.

That is, a gas cylinder having a main valve on the outlet side, and a cylindrical partition slidably disposed in the gas cylinder in the axial direction and having a closed end in the direction of the main valve are provided.

In the above, a liquefied gas is filled in a gas cylinder. At this time, the partition is located at the end in the direction opposite to the main valve, and the closed end side is filled with liquefied gas together with the gas.

When used in a microgravity state, when the main valve is opened, the gas expands and the partition slides in the direction of the main valve. The liquefied gas on the main valve side is pushed by the partition and ejects in a liquid state.

When the partition reaches the end on the base valve side, the jetting stops. Therefore, most of the liquefied gas in the cylinder will be discharged.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIG. At the outlet of one end of the liquefied gas cylinder 1, there is a main valve 2.
Is provided. Inside the liquefied gas cylinder 1, a partition 3, which is cylindrical and has a conical closed end on the base valve 2 side, is disposed so as to be slidable in the axial direction.

A liquefied gas cylinder 1 is filled with a liquefied gas 4. At this time, the partition 3 is disposed at an end far from the main valve 2. The liquefied gas 5 is also filled on the open end side of the partition 3 so as to have the gas 7 in the partition 3.

In the above, when the liquefied gas 4 inside is taken out under microgravity, the main valve 2 is opened. Then, the gas 7 in the partition 3 expands and the partition 3 moves, and the liquefied gas is injected in a liquid form from the outlet a.

That is, (the pressure of the liquefied gas 4 on the source valve 2 side) <(the pressure of the liquefied gas 5 on the opposite side) from the partition 3 as a boundary, the partition 3 slides toward the source valve 2 side, and the pressure is reduced. Stop in a balanced state. In this movement of the partition 3, since the moving direction side has a conical shape, it can move in a stable state. At this time, the liquefied gas 5 is moved by the movement of the partition 3.
The pressure is reduced and a part of the gas is vaporized to be in a gas-liquid two-phase state. Therefore, by adjusting the filling amount such that the pressure of the liquefied gas 5 (two-phase gas and liquid) is kept higher than the saturated vapor pressure of the liquefied gas 4 until all the liquefied gas 4 is injected from the main valve 2. The liquid liquefied gas 4 can always be injected from the valve 2 until the partition 3 reaches the end on the main valve 2 side.

In this manner, the liquefied gas 4 can be ejected, and most of the liquefied gas 4 in the liquefied gas cylinder 1 can be discharged under microgravity.

In the above description, the closed end side of the partition 3 has a conical shape, but may have a bowl shape or a flat shape.

[0017]

As described above, since the slidable main valve side closed end partition is provided in the liquefied gas cylinder, most of the liquefied gas inside can be jetted and discharged even under microgravity. .

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquefied gas cylinder 2 Main valve 3 Divider 4,5 Liquefied gas 6 Siphon pipe 7 Gas 8 Inlet

Claims (1)

[Claims] 1. A liquefied gas cylinder comprising: a gas cylinder having a main valve on an outlet side; and a cylindrical partition slidably disposed in the gas cylinder in an axial direction and having a closed end in the direction of the main valve. .