JP2004197783A - High pressure gas filling method, device and filling port structure used for the method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high pressure gas filling method, and a device and filling port structure used for the method, allowing welding of a seal plate to a vessel filled with combustion susceptible gas or combustible gas. <P>SOLUTION: A main body 23 is constituted of a top plate 21 and a cylindrical leg part 22 projecting from a back face of the top plate with a collar 21a on an outer circumference left, and the seal plate 20 having projections 24 forming a gas filling space S is used for the main body. Firstly, annular metal packing 40 that has an inside diameter 41 larger than an outside diameter of the leg part and is softer than the projections is disposed in the seal plate, and an opening part 31 of the vessel 30 is surrounded by an air-tight space 4 together with the seal plate and the metal packing. Next, combustion susceptible (combustible) filling gas is supplied with pressure into the space and the vessel, and the seal plate is brought into press-contact with the opening part by a seal means 5 to seal the vessel. After replacing the inside of the space with inert gas, the seal plate is welded to the vessel. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to oxygen (O _Two ) And nitrous oxide (N _Two O) and other supporting gases, LPG and hydrogen (H _Two The present invention relates to a method for filling a container with a flammable gas such as flammable gas or a mixture thereof at a high pressure and sealing it, and an apparatus and a filling port structure used in the method.
[0002]
[Prior art]
A handy and compact small gas container is called a mini gas cartridge, and is commonly used in fire extinguishers, life jackets, draft beer servers, and the like. And as such a mini gas cartridge, carbon dioxide (CO _Two ), Nitrogen gas (N _Two ), Argon gas (Ar), inert gas such as helium gas (He), as well as a gas filled with a combustible gas such as oxygen or nitrous oxide, or a combustible gas such as LPG or hydrogen. I have.
[0003]
When manufacturing a mini-gas cartridge filled with an inert gas, the gas is filled in a container, and a sealing plate is welded and sealed to prevent leakage. This method of welding the sealing plate is a sealing method without leakage, and it is possible to prevent the leakage semipermanently by appropriate quality control and inspection.
[0004]
On the other hand, when manufacturing a mini gas cartridge filled with a flammable gas or a flammable gas, the sealing plate could not be welded because the gas easily caused an explosion or the like. Therefore, at present, a container filled with a combustible gas or a combustible gas is sealed by a method of tightening with a valve or a method of caulking.
[0005]
[Patent Document]
Japanese Patent Application 2001-342648
[0006]
[Problems to be solved by the invention]
However, sufficient sealing cannot be achieved by any method other than welding the sealing plate, and when it is required to maintain gas pressure and gas amount for a long period of time, such as for disaster prevention, There were also disadvantages in terms of safety and diameter.
[0007]
Therefore, the present invention provides a method for filling high-pressure gas, which enables a sealing plate to be welded to a container filled with gas having flammability or flammability, an apparatus used for the method, and a filling port structure. The purpose is to:
[0008]
[Means for Solving the Problems]
The method for filling a high-pressure gas according to the present invention includes a main body including a top plate and a cylindrical leg projecting from the back surface of the top plate while leaving a flange on the outer periphery of the top plate. A sealing plate having a projection forming a gas filling gap is used in a portion facing an opening of a gas filling container. Upon filling with the high-pressure gas, first, an annular metal packing having an inner diameter larger than the outer diameter of the leg and softer than the protrusion is interposed on the sealing plate, and the opening is formed together with the sealing plate and the metal packing. Surround in an airtight space. Subsequently, a filling gas having flammability or flammability is injected into the space and the interior of the container by a pressure difference, and the sealing plate is moved toward and away from the opening in the space by the sealing means. To make the container hermetically sealed. After the interior of the space is replaced with an inert gas, the sealing plate is welded to the container.
[0009]
According to this filling method, a sealing plate is pressed against a container filled with a filling gas having flammability or combustibility to perform temporary sealing, and the gas present around the sealing plate is replaced with an inert gas. Thus, the sealing plate can be placed in an inert gas atmosphere. Therefore, even if the container is filled with a filling gas having flammability or flammability, the sealing plate can be welded to the container. At this time, the metal packing is deformed by pressing the sealing plate against the opening, and the gas filling gap formed between the opening and the sealing plate is closed, so that the gas filling gap is formed. The gap can be closed without welding. In addition, by providing a space that hermetically surrounds the opening, when the filling gas is injected into the container, the sealing plate can be pressed against the opening while maintaining the inside of the container at a high pressure, and the sealing plate is welded. In this case, the periphery of the sealing plate can be replaced with an inert gas. It is desirable that the degree of sealing of the container by pressing the sealing plate is as high as possible.However, even when a small gap is formed between the sealing plate and the opening, the pressure of the inert gas in the space is increased. Welding can be performed safely by making the leakage of the filling gas in the container extremely low.
[0010]
Further, according to this filling method, the volume of the place (space and container) into which the filling gas is injected is fixed, so that accurate filling of the mass is possible.
Further, since the number of steps is small and ultra-high pressure gas can be processed in a large amount in a short time, the cost of the product can be reduced.
Furthermore, since welding is performed in an inert gas atmosphere, oxidation and other reactions do not occur, and a high-quality weld surface and strength can be secured.
[0011]
The metal packing has a cross-sectional shape having at least one acute angle, the inner periphery is formed by continuously forming the apex of the acute angle, and the protrusion is formed on the outer periphery of the leg. The gas filling gap may be formed between the surface of the leg portion and the metal packing by contacting the gasket with the inner periphery.
In this way, an inclined surface is formed on the upper surface of the metal packing placed in the opening so as to gradually increase from the inner periphery to the upper outside. Then, in the gas filling gap formed by the inclined surface and the portion of the sealing plate body facing the container opening, the filling gas flows into the container along the inclined surface. Therefore, resistance at the time of injecting the filling gas into the inside of the container can be reduced and the filling gas can be efficiently injected.
[0012]
Further, the material of the metal packing is preferably copper that has been subjected to an annealing treatment, so that the necessary flexibility can be imparted when the sealing plate is pressed.
[0013]
The bottom of the container may be supported in an electrically conductive state, the sealing means may be connected to a welding power source, and the sealing plate may be resistance-welded to the opening.
In this case, welding can be easily performed in a short time. In addition, the entire periphery of the opening can be uniformly welded, and the sealing performance can be improved.
[0014]
The welding power source may be controlled according to a measurement value of a concentration analyzer of the filling gas connected to the space.
This can prevent an accident at the time of welding due to the filling gas.
[0015]
Before injecting the filling gas into the space and the inside of the container, the inside of the space may be evacuated.
In this case, since the air inside the container is removed before the filling gas is injected, a high-purity gas can be filled.
[0016]
The filling gas may be stored in a buffer container before being injected into the space and the interior of the container.
In this case, the filling operation can be performed more quickly than when filling is performed by a device such as a compressor.
[0017]
The high-pressure gas filling apparatus according to the present invention includes: a holding unit that holds an opening of a container; a supporting unit that abuts on the bottom of the container so as to be able to conduct electricity to support the container; an inert gas supply unit; Filling gas supply means for supplying a filling gas having flammability or flammability. The holding means includes a space that hermetically surrounds the opening, and sealing means that advances and retreats with respect to the opening. The space has an openable and closable exhaust port. The inert gas supply means and the filling gas supply means are individually connected to the space via an on-off valve. The support means and the sealing means are connected to a welding power source.
[0018]
According to this filling device, when the container is held by the holding means, the opening of the container is surrounded by the airtight space, so that the filling gas can be injected from the filling gas supply means into the container using the space. . In addition, since the space has an openable and closable exhaust port, an inert gas is injected from an inert gas supply unit while excluding a filling gas filled in the space, and an atmosphere around the opening of the container is set to an inert gas atmosphere. be able to. Further, since the holding means includes a sealing means which advances and retreats with respect to the opening, in a state where the container is held, the sealing means is moved toward the opening as necessary, and a necessary pressure is applied thereto. be able to. Furthermore, since the support means and the sealing means are connected to the welding power source, by bringing the sealing means into contact with the opening, a resistance current can be passed therethrough to perform resistance welding. Therefore, it can be used for the method for filling high-pressure gas according to the present invention.
[0019]
The space may communicate with the evacuation unit via an on-off valve.
In this case, since the air inside the container is removed before the filling gas is injected, a high-purity gas can be filled.
[0020]
The sealing means may have a detachable electrode at a contact portion of the sealing plate, and the support means may have a detachable electrode at a contact portion of the bottom.
This makes it possible to easily replace the electrode that is consumed by repeating the filling operation, and to reduce the downtime for the device maintenance operation.
[0021]
The support means may be adapted to the bottom and position the axis of the container in place.
In this case, welding can be performed accurately, and the quality of the product can be improved.
[0022]
A buffer container may be provided between the filling gas supply means and the space.
In this case, the filling operation can be performed more quickly than when filling is performed by a device such as a compressor.
[0023]
The opening is formed at the top end of the reduced diameter neck of the container, the holding means has an insertion port communicating with the space, the insertion port is provided with a detachable sealing member, and the neck is the insertion port. May be inserted closely.
In this case, the space can be kept airtight by utilizing the shape of the container. Further, the seal member consumed by repeating the filling operation can be easily replaced, and the downtime for the device maintenance operation can be reduced.
[0024]
The diameter of the insertion port may be changed, and the diameter of a portion supporting the bottom of the support means may be changed.
This makes it possible to accommodate various types of containers having different diameters.
[0025]
The holding means and the support means may be relatively movable.
In this way, it is possible to cope with various types of containers having different lengths.
[0026]
The power supply for welding may be controlled according to a measurement value of a concentration analyzer of the filling gas connected to the space.
This can prevent an accident at the time of welding due to the filling gas.
[0027]
The filling port structure according to the present invention has a main body composed of a top plate and a cylindrical leg protruding from the back surface of the top plate while leaving a flange on the outer periphery of the top plate, and the high-pressure gas of the main body is On a sealing plate provided with a projection at a portion facing the opening of the container to be filled, an annular and softer metal packing than the projection having an inner diameter larger than the outer diameter of the leg is interposed, and the main body, the metal packing and A gas filling gap is formed through the projection.
[0028]
According to this filling port structure, a gas filling gap can be formed in the opening of the container, and the gap can be closed without welding by utilizing the deformation of the metal packing. Therefore, even if the container is filled with a flammable or flammable filling gas, the sealing plate is first welded by removing the filling gas around the opening by performing temporary sealing using the deformation of the metal packing. It is possible to do.
[0029]
DETAILED DESCRIPTION OF THE INVENTION
1 to 4 show specific examples of a high-pressure gas filling apparatus and a filling port structure according to the present invention. 1A and 1B show a state in which a container having the filling port structure is installed in the filling apparatus, FIG. 1A is a diagram showing an overview of the filling apparatus including the container, and FIG. 1B is an enlarged view of the filling port structure. FIG. FIG. 2 is a bottom view of a sealing plate used in the filling port structure. 3A and 3B show a state in which a gas filling gap in the filling port structure is closed by deformation of a metal packing, FIG. 3A is a diagram showing an overview of the filling apparatus including a container, and FIG. It is a front sectional view which expands and shows a structure. FIG. 4 is a block diagram illustrating equipment for ensuring safety of the filling device.
[0030]
As shown in FIG. 1A, the high-pressure gas filling apparatus 1 includes a holding means 2 for holding an opening 31 of a container 30 and a support for supporting the container 30 by contacting the bottom 32 of the container 30 so as to be able to conduct electricity. Means 3, an inert gas supply means 6, and a filling gas supply means 7 for supplying a filling gas having flammability or combustibility are provided.
The holding means 2 includes a space 4 which is fixed to the stay 51 and hermetically surrounds the opening 31 and a sealing means 5 which advances and retreats with respect to the opening 31. The sealing means 5 is connected to the welding power source 10 together with the support means 3.
The space 4 has an exhaust port 8 that can be freely opened and closed. The exhaust port 8 communicates with an exhaust gas collection container (not shown) so that gas discharged from the space 4 through the exhaust port 8 is collected.
The inert gas supply means 6 and the filling gas supply means 7 are individually connected to the space 4 via on-off valves 9a and 9b.
[0031]
According to the filling device 1, when the container 30 is held by the holding means 2, the opening 31 of the container 30 is surrounded by the airtight space 4. Can be injected into the container. Further, since the space 4 has an openable and closable exhaust port 8, an inert gas is injected from the inert gas supply means 6 while excluding a filling gas filled in the space, and the periphery of the opening 31 of the container 30 is kept in the vicinity. An active gas atmosphere can be used. Further, since the holding means 2 includes the sealing means 5 which advances and retreats with respect to the opening 31, the holding means 2 moves the sealing means 5 toward the opening 31 as necessary while holding the container 30. Required pressure can be applied. Furthermore, since the support means 3 and the sealing means 5 are connected to the welding power source 10, it is possible to carry out resistance welding by bringing the sealing means 3 into contact with the opening 31 so that a resistance current flows therethrough. it can.
[0032]
As shown in FIG. 1B, the opening 31 has a filling port structure including the sealing plate 20 and the metal packing 40. The sealing plate 20 has a main body 23 composed of a top plate 21 and a cylindrical leg 22 protruding from the back surface of the top plate 21 while leaving a flange 21 a on the outer periphery of the top plate 21. The projection 24 is provided in a portion facing the. On the other hand, the metal packing 40 is annular and has an inner diameter 41 larger than the outer diameter of the leg portion 22 of the sealing plate 20, is softer than the projection 24, and is interposed on the sealing plate 20. A gas filling gap S is formed between the main body 23 of the sealing plate 20 and the metal packing 40 via the projection 24. In FIG. 1B, in order to clarify the structure of the gas filling gap S, a cross section taken along the line A in FIG. 2 is shown on the left side of the axis X of the sealing plate 20, and a section B shown in FIG. The cross section at the line is shown. FIG. 3B is the same.
[0033]
According to this filling port structure, the gas filling gap S can be formed in the opening 31 of the container 30 and the gap S can be closed without welding by utilizing the deformation of the metal packing 40. Therefore, even if the container is filled with a flammable or flammable filling gas, first, temporary sealing using deformation of the metal packing 40 is performed to remove the filling gas around the opening 31 and remove the sealing plate. 20 can be welded.
[0034]
When the method for filling high-pressure gas according to the present invention is performed using the filling device 1 and the filling port structure, the following is performed.
When filling the high-pressure gas, first, a metal packing 40 is interposed on the sealing plate 20, and a gas filling gap S is formed between the main body 23 and the metal packing 40 via the projection 24, that is, the above-described filling is performed. Make up the mouth structure. Further, the exhaust port 8 and the on-off valves 9a and 9b are closed.
Next, as shown in FIG. 1, the container 30 is held by the holding means 2, and the opening 31 is surrounded by the airtight space 4 together with the sealing plate 20 and the metal packing 40. Subsequently, while the exhaust port 8 and the on-off valve 9a for the inert gas supply means 6 are closed, the on-off valve 9b for the filling gas supply means 7 is opened, and the filling gas is pressured into the space 4 and the container 30. Inject by difference. When the injection of the filling gas is completed, the sealing means 5 presses the sealing plate 20 against the opening 31 to bring the container 30 into the sealed state shown in FIG. At this time, the metal packing 40 is deformed by pressing the sealing plate 20 against the opening 31, and the gas filling gap S formed between the opening 31 and the sealing plate 20 is in a closed state. While forming the gap S, it is possible to close the gap S without welding.
When the container 30 is sealed, this time, the on-off valve 9b for the filling gas supply means 7 is closed, the on-off valve 9a for the exhaust port 8 and the inert gas supply means 6 is opened, and the inside of the space 4 is filled with the inert gas. Replace. When the replacement is completed, the exhaust port 8 and the on-off valves 9a and 9b are closed.
Finally, the welding power source 10 is operated to energize the sealing means 5, the sealing plate 20 is welded to the opening 31, the container 30 is removed from the holding means 2, and a series of operations is completed. It is desirable that the degree of sealing of the container 30 by pressing the sealing plate 20 is as high as possible. However, even if a slight gap is formed between the sealing plate 20 and the opening 31, the inert gas in the space 4 is not affected. The pressure can be increased to minimize the leakage of the filling gas in the container 30, thereby making it possible to perform welding safely.
[0035]
According to this filling method, the sealing plate 20 is pressed against the container 30 filled with the filling gas having flammability or combustibility to perform temporary sealing, and the gas existing around the sealing plate 20 is inert gas. , The sealing plate 20 can be placed in an inert gas atmosphere. Therefore, even if the container is filled with a filling gas having flammability or flammability, the sealing plate can be welded to the container.
[0036]
Further, according to this filling method, since the volume of the place (the space 4 and the container 30) into which the filling gas is injected is fixed, accurate filling of the mass becomes possible.
Further, since the number of steps is small and ultra-high pressure gas can be processed in a large amount in a short time, the cost of the product can be reduced.
Furthermore, since welding is performed in an inert gas atmosphere, oxidation and other reactions do not occur, and a high-quality weld surface and strength can be secured.
[0037]
When the filling device 1 is used, the sealing plate 20 is resistance-welded to the opening 31. In this case, welding can be easily performed in a short time, and the entire circumference of the opening 31 is uniformly welded. This is preferable because the sealing property can be improved.
[0038]
The metal packing 40 has a cross-sectional shape having at least one acute angle. The inner periphery 41 is formed by continuously forming the peaks of the acute angle. The protrusion 24 is formed on the outer periphery of the leg 22. A gas filling gap S is formed between the surface of the leg portion 22 and the metal packing 40 by contacting the gasket with the inner periphery 41.
In this case, on the upper surface of the metal packing 40 placed in the opening 31, an inclined surface is formed which gradually becomes higher from the inner periphery 41 to the outer upper side. Then, in the gas filling gap formed by the inclined surface and the portion of the sealing plate body 23 facing the container opening 31, the filling gas flows into the container along the inclined surface. Therefore, the resistance at the time of injecting the filling gas into the container 30 can be reduced, and the gas can be efficiently injected.
[0039]
In addition, as the sealing plate 20, a known one in which the protrusion 24 is provided on the back surface of the flange 21a may be used. In this case, since the projection 24 comes into contact with the upper surface of the metal packing 40 to form the gas filling gap S, the flow resistance of the filling gas can be reduced even if the cross-sectional shape of the metal packing 40 is, for example, circular. .
[0040]
The material of the metal packing 40 is annealed copper. In this case, the sealing plate 20 can be provided with necessary flexibility when it is pressed.
[0041]
The space 4 is connected to the evacuation unit 11 via an on-off valve 12. Then, before the filling gas is injected into the space 4 and the inside of the container 30, the inside of the space 4 is evacuated.
In this way, the air inside the container 30 is removed before the filling gas is injected, so that a high-purity gas can be filled.
[0042]
A buffer container 15 is provided between the filling gas supply means 7 and the space 4. The filling gas is stored in the buffer container 15 before being injected into the space 4 and the inside of the container 30.
In this case, the filling operation can be performed more quickly than by using a device such as a compressor.
[0043]
The sealing means 5 has a detachable electrode 13 at a contact portion of the sealing plate 20, and the support means 3 has a detachable electrode 14 at a contact portion of the container bottom 32.
In this case, the electrodes consumed by repeating the filling operation can be easily replaced, and the downtime for the device maintenance operation can be reduced.
[0044]
The support means 3 is adapted to the container bottom 32 and to position the axis X of the container 30 in place.
In this case, welding can be performed accurately, and the quality of the product can be improved.
[0045]
The opening 31 is formed at the top end of the reduced diameter neck 33 of the container 30, and the holding means 2 has an insertion port 16 communicating with the space 4. The insertion port 16 includes a detachable sealing member 17 so that the neck 33 is inserted into the insertion port 16 in close contact.
In this case, the space 4 can be kept airtight by utilizing the shape of the container 30. Further, the seal member 17 consumed by repeating the filling operation can be easily replaced, and the stop time for the device maintenance operation can be reduced.
[0046]
The diameter of the insertion port 16 is changeable, and the diameter of the portion of the support means 3 that supports the container bottom 32 is changeable.
In this case, various types of containers having different diameters can be accommodated.
[0047]
The support means 3 is capable of moving forward and backward with respect to the holding means 2, and the holding means 2 and the support means 3 are in a relationship in which they can move relative to each other.
In this case, various types of containers having different lengths can be accommodated.
[0048]
As shown in FIG. 4, the space 4 is connected to a concentration analyzer 18 for the filling gas. The welding power source 10 is controlled according to the measurement value of the concentration analyzer 18. For example, when oxygen is filled as the filling gas, the welding power supply 10 is operated and the sealing means 5 is energized only when the oxygen concentration in the space 4 becomes 10% or less.
This can prevent an accident at the time of welding due to the filling gas.
[0049]
A digital pressure gauge 52 is connected to the space 4, and the measured value is output to the control device 54. Further, an analog pressure gauge 53 for compensating the operation of the digital pressure gauge 52 is connected to the space 4. On the other hand, the opening and closing of the two on-off valves 9a and 9b is controlled by the control device 55 in accordance with the pressure. Time lag control is used to open and close these on-off valves 9a and 9b, so that both on-off valves 9 are not opened at the same time. The welding power source 10 is also controlled by these control devices 54 and 55.
In this case, by providing a double interlock for the operation of the welding power supply 10, welding in a filling gas atmosphere can be prevented, and safety can be improved.
[0050]
【The invention's effect】
According to the method for filling a high-pressure gas according to the present invention, a sealing plate is pressed against a container filled with a filling gas having flammability or flammability to perform temporary sealing, and gas existing around the sealing plate is removed. By replacing with an inert gas, the sealing plate can be placed in an inert gas atmosphere. Therefore, even if the container is filled with a filling gas having flammability or flammability, the sealing plate can be welded to the container. Further, since the volume of the place (space and container) into which the filling gas is injected is determined, accurate filling of the mass becomes possible. Further, since the number of steps is small and ultra-high pressure gas can be processed in a large amount in a short time, the cost of the product can be reduced. Furthermore, since welding is performed in an inert gas atmosphere, oxidation and other reactions do not occur, and a high-quality weld surface and strength can be secured.
[0051]
According to the second aspect, the resistance at the time of injecting the filling gas into the inside of the container can be reduced, and the gas can be efficiently injected.
[0052]
According to the third aspect, welding can be easily performed in a short time. In addition, the entire periphery of the opening can be uniformly welded, and the sealing performance can be improved.
[0053]
According to the high-pressure gas filling apparatus of the present invention according to claim 7, it can be used for the high-pressure gas filling method of the present invention.
[0054]
According to claim 4 or 15, an accident at the time of welding with the filling gas can be prevented.
[0055]
According to claim 5 or 8, high-purity gas can be charged.
[0056]
According to the sixth or eleventh aspect, the charging operation can be performed more quickly than the charging operation using a device such as a compressor.
[0057]
According to the ninth aspect, it is possible to easily replace the electrode that is consumed by repeating the filling operation, and it is possible to reduce the stop time for the device maintenance operation.
[0058]
According to the tenth aspect, welding can be performed accurately, and the quality of a product can be improved.
[0059]
According to the twelfth aspect, the space can be kept airtight by utilizing the shape of the container. Further, the seal member consumed by repeating the filling operation can be easily replaced, and the downtime for the device maintenance operation can be reduced.
[0060]
According to the thirteenth aspect, it is possible to cope with various types of containers having different diameters.
[0061]
According to claim 14, various kinds of containers having different lengths can be accommodated.
[0062]
According to the filling port structure of the present invention according to claim 16, even if the container is filled with a filling gas having flammability or combustibility, first, provisional sealing using deformation of the metal packing is performed. This makes it possible to remove the filling gas around the opening and weld the sealing plate.
[Brief description of the drawings]
FIG. 1 shows a specific example of a high-pressure gas filling apparatus and a filling port structure according to the present invention in a state where a container having the filling port structure is installed in the filling apparatus. The figure which shows the external appearance of an apparatus, (b) is a front sectional view which expands and shows the filling port structure.
FIG. 2 is a bottom view of a sealing plate used in the filling port structure.
3A and 3B show a state in which a gas filling gap in the filling port structure is closed by deformation of a metal packing, FIG. 3A is a diagram showing an overview of the filling apparatus including a container, and FIG. It is a front sectional view which expands and shows a structure.
FIG. 4 is a block diagram illustrating equipment for ensuring safety of the filling device.
[Explanation of symbols]
1 High pressure gas filling equipment
2 holding means
3 support means
4 Space
5 Sealing means
6 Inert gas supply means
7 Filling gas supply means
8 Exhaust port
9a, 9b, 12 On-off valve
10 Power supply for welding
11 Evacuation means
13, 14 electrodes
15 Buffer container
16 insertion slot
17 Sealing member
18 Concentration analyzer
20 Seal plate
21 Top plate
21a Tsuba
22 legs
23 Body
24 protrusion
30 containers
31 Opening
32 bottom
33 Neck
40 Metal packing
41 inner diameter
S gas filling gap
X axis

Claims (16)

A body (23) comprising a top plate (21) and a cylindrical leg (22) projecting from the back surface of the top plate (21) while leaving a flange (21a) on the outer periphery of the top plate (21). A sealing plate (20) having a projection (24) forming a gas filling gap (S) at a portion of the main body (23) facing the opening (31) of the container (30) for filling with high-pressure gas. use,
An annular metal packing (40) having an inner diameter (41) larger than the outer diameter of the leg (22) and being softer than the projection (24) is interposed in the sealing plate (20), and the opening (31) Surrounded by an airtight space (4) together with the sealing plate (20) and the metal packing (40),
Pressurizing a filling gas having flammability or combustibility into the space (4) and the container (30),
The sealing plate (20) is pressed against the opening (31) by the sealing means (5) which advances and retreats in the space (4) with respect to the opening (31), and the container (30) is sealed. ,
A method for filling with a high-pressure gas, comprising replacing the inside of the space (4) with an inert gas, and then welding the sealing plate (20) to the container (30). The metal packing (40) has a cross-sectional shape having at least one acute angle, the inner periphery (41) is formed by continuous formation of the acute angle apex, and the projection (24) is formed by the leg ( The gas filling gap is formed between the surface of the leg (22) and the metal packing (40) by contacting the projection (24) with the inner circumference (41). The method for filling a high-pressure gas according to claim 1, wherein (S) is formed. The bottom part (32) of the container (30) is supported in an electrically conductive state, the sealing means (5) is connected to a welding power source (10), and the sealing plate (20) is connected to the opening (31). 3. The method for filling a high-pressure gas according to claim 1, wherein resistance welding is performed. The method according to claim 3, wherein the welding power source (10) is controlled in accordance with a value measured by a concentration analyzer (18) of the filling gas connected to the space (4). The high-pressure gas according to any one of claims 1 to 4, wherein the space (4) is evacuated before the filling gas is injected into the space (4) and the container (30). Filling method. The high-pressure gas according to any one of claims 1 to 5, wherein the filling gas is stored in a buffer container (15) before being injected into the space (4) and the inside of the container (30). Filling method. Holding means (2) for holding the opening (31) of the container (30), and supporting means (3) for supporting the container (30) by abutting on the bottom (32) of the container (30) in an energizable manner. And an inert gas supply means (6), and a filling gas supply means (7) for supplying a filling gas having flammability or combustibility,
The holding means (2) includes a space (4) that hermetically surrounds the opening (31), and a sealing means (5) that advances and retreats with respect to the opening (31),
The space (4) has an openable / closable exhaust port (8),
The inert gas supply means (6) and the filling gas supply means (7) are individually connected to the space (4) via on-off valves (9a, 9b),
The high-pressure gas filling device, wherein the support means (3) and the sealing means (5) are connected to a welding power source (10). The high-pressure gas filling device according to claim 7, wherein the space (4) communicates with the evacuation means (11) via an on-off valve (12). The sealing means (5) has a detachable electrode (13) at a contact portion of the sealing plate (20), and the supporting means (3) is detachable at a contact portion of the bottom portion (32). The high-pressure gas filling device according to claim 7 or 8, further comprising an electrode (14). High pressure gas filling according to any one of claims 7 to 9, wherein the support means (3) is adapted to the bottom (32) and positions the axis (X) of the container (30) in place. apparatus. The high-pressure gas filling device according to any one of claims 7 to 10, wherein a buffer container (15) is provided between the filling gas supply means and the space. The opening (31) is formed at the top end of the reduced diameter neck (33) of the container, the holding means (2) has an insertion port (16) communicating with the space (4), and The high-pressure gas filling device according to any one of claims 7 to 11, wherein (16) includes a detachable sealing member (17), and the neck portion (33) is closely inserted into the insertion port (16). . The high-pressure gas filling according to claim 12, wherein a diameter of the insertion port (16) is changeable, and a diameter of a portion of the support means (3) supporting the bottom (32) is changeable. apparatus. 14. The high-pressure gas filling apparatus according to claim 7, wherein the holding means (2) and the supporting means (3) are relatively movable. The welding power source (10) according to any one of claims 7 to 14, wherein the welding power source (10) is controlled according to a measurement value of a concentration analyzer (18) of the filling gas connected to the space (4). A high-pressure gas filling apparatus as described in the above. A body (23) comprising a top plate (21) and a cylindrical leg (22) projecting from the back surface of the top plate (21) while leaving a flange (21a) on the outer periphery of the top plate (21). A sealing plate (20) having a projection (24) for welding at a portion of the main body (23) facing the opening (31) of the container (30) filled with a high-pressure gas, the legs (22) An annular metal packing (40) having an inner diameter (41) larger than the outer diameter and softer than the projection (24) is interposed, and the projection (24) is provided between the main body (23) and the metal packing (40). ) Through which a gas filling gap (S) is formed.

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