KR101775892B1 - Safety apparatus by blocking gas flow channel of portable gas container - Google Patents

Abstract

The safety device of the present invention comprises a valve stem housing having an L-shaped gas flow path formed therein and a safety device housing provided on a side surface of the valve stem housing, And configured to communicate with a lower portion of the safety device housing; A first gasket mounted between the upper portion of the safety device housing and a hole formed in the mounting cup; The upper protrusion is formed on the upper end of the rod-shaped body, the spring support protrusion is formed on the lower part of the upper protrusion, the flow blocking protrusion is formed on the lower end of the body, and the through- A shaft inserted and disposed in the safety device housing; A stopper disposed at a lower portion of the first gasket, the stopper being inserted through a center portion of the shaft and having an outer circumferential surface closely contacted with an inner circumferential surface of the safety device housing; A spring fitted to the shaft and provided between the stopper and the spring bearing jaw of the shaft; And a second gasket sandwiched between the shaft and the lower portion of the spring bearing base of the shaft and disposed above the upper portion of the gas flow path located horizontally in the valve stem housing, Thereby opening and closing the gas flow path.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for a portable gas container,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a safety device for blocking a flow path of a portable gas container, and more particularly, The present invention relates to a safety device for a flow path barrier of a portable gas container, which can prevent explosion and fire of the container.

The portable butane gas container used for the portable gas stove by filling the butane gas mixture mainly made of butane gas, when the heat is received from the surroundings during the circulation process or use, the pressure of the liquefied gas in the butane gas container rises , Do not observe the safety rules in use, Do not obey the rules, or use a high pressure or higher than a certain level of pressure inside the pressure increases, the container may be deformed or broken, can explode in severe cases. Therefore, the law stipulates pressure, deformation, and rupture pressure that a portable gas container can withstand.

Up to now, most of the technologies that have appeared in connection with the safety of portable gas containers have been provided with safety valves for discharging overpressure when the pressure in the gas container rises above a certain level. The inventors of the present invention Patented, and applied to products. For example, Patent No. 1064633 entitled "Portable Gas Container Safety Valve", Patent No. 1281536 "Portable Gas Container Safety Valve with Overpressure Prevention Function", Patent No. 164493 " A safety valve for overpressure discharge "

In recent years, when the pressure in the portable gas container has risen to a certain level or more, a technique of shutting off the gas passage has been developed instead of discharging the overpressure. Patent Registration No. 1561825 "Safety Device for Preventing Gas Release of Gas Pipe", Patent Registration No. 1572622 No. 1572626, "Gas container safety device ". These patents are technologies for preventing the gas container from exploding by shutting down the flow path to the valve stem when an overpressure occurs in the gas container, thereby reducing the pressure in the gas container as the firearm is shut off around the gas container.

However, in the state where the gas container is mounted on the portable gas range, the pressure of the gas from the gas container and the inside of the gas container are always the same and the differential pressure does not occur. Further, in the above-mentioned patents, which cut off the flow path when an overpressure is generated, a movable valve (shut-off valve) for shutting off the flow path to the valve stem is provided in the flow path to the valve stem, and a movable valve The gas flow path to the valve stem can not be blocked due to the structure in which the differential pressure can not be generated even when the pressure in the gas container rises above a certain level during use.

In addition, since the safety device operates, the shaft operates at the boundary of the pressure. Since the patent uses a spring-type valve, the boundary of the operating pressure is unclear and can be repeatedly opened and closed. There is a problem in that the consumer continues to use the container with a risk of explosion in a state of overpressure in which the pressure in the gas container is not sufficiently lower than the preset value.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide an apparatus and a method for accurately detecting an atmospheric pressure and a pressure difference in a gas container when a pressure exceeding a certain level occurs in a portable gas container, The present invention is intended to provide a safety device for a flow path barrier of a portable gas container, which prevents the gas from being discharged by blocking the flow path through which the gas is discharged to the valve stem while the shaft is operated.

In order to solve the above problems, a safety device for a flow path barrier of a portable gas container according to the present invention comprises a valve stem housing having an L-shaped gas flow path, a safety valve provided in a vertical direction, A housing formed integrally with the valve stem housing such that the horizontal gas flow passage of the valve stem housing crosses the safety housing and the lower end of the safety housing is positioned below the gas flow passage of the valve stem housing; A first gasket mounted between the upper portion of the safety device housing and a hole formed in the mounting cup; The upper protrusion and the lower protrusion are formed at both ends of the rod-shaped main body, the spring protrusion protrusion and the protrusion are formed between the upper protrusion and the lower protrusion, and inserted into the safety device housing A shaft to be disposed; A stopper disposed at a lower portion of the first gasket, the stopper being inserted through a center portion of the shaft and having an outer circumferential surface closely contacted with an inner circumferential surface of the safety device housing; A spring fitted to the shaft and provided between the stopper and the spring bearing jaw of the shaft; A second gasket sandwiched between the shaft and the lower portion of the spring base of the shaft and between the upper portion of the horizontally located gas flow path of the valve stem housing; And a third gasket sandwiched between the shaft and the small-diameter portion of the safety device housing, the third gasket being positioned between the engagement protrusion of the shaft and the lower protrusion, wherein when the shaft moves in the vertical direction, And is configured to open and close the flow path.

Preferably, a hole formed in the mounting cup is formed on a line connecting the center of the mounting cup and the notch.

Preferably, when the pressure in the gas container becomes higher than the set pressure, the shaft is compressed while the spring is compressed so that the third gasket mounted between the engagement protrusion and the lower protrusion of the shaft blocks the gas flow supplied to the valve stem, It blocks the spout.

Preferably, the stopper is open at the bottom and has a through hole formed in a central portion of the closed top in the up-and-down direction so that the upper protrusion of the shaft is inserted and inserted into the through hole, (Sidewall) provided with a gap (space), and the outer circumferential surface of the side wall is closely attached to the inner circumferential surface of the safety device housing.

Preferably, a step is formed at a lower end portion of the outer circumferential surface of the stopper, and a step corresponding to the inner circumferential surface of the large-diameter portion of the safety device housing is formed. When the stopper is mounted on the inner circumferential surface of the large- And the jaw portion of the large diameter portion can be fixed in position.

Preferably, the second gasket has a cylindrical shape, and a hole penetrating the vertical direction is formed at the central portion, so that the shaft penetrates. The upper end portion of the cylinder has a protrusion with a hemispherical cross- Respectively.

Another embodiment of the flow-path safety device of the present invention is characterized in that a valve stem housing in which an L-shaped gas flow path is formed and a safety device housing provided on a side surface of the valve stem housing are integrally formed, A housing configured to communicate with a lower portion of the safety device housing through a hole on the directional gas flow path; A first gasket mounted between the upper portion of the safety device housing and a hole formed in the mounting cup; An upper protrusion is formed on an upper end portion of a rod-like body, a spring support protrusion is formed on a lower portion of the upper protrusion, a flow blocking protrusion is formed on a lower end portion of the main body, A shaft inserted into the safety device housing and having a through hole formed therein to communicate with a gas flow path; A stopper disposed at a lower portion of the first gasket, the stopper being inserted through a center portion of the shaft and having an outer circumferential surface closely contacted with an inner circumferential surface of the safety device housing; A spring fitted to the shaft and provided between the stopper and the spring bearing jaw of the shaft; And a second gasket sandwiched between the shaft and the lower portion of the spring bearing base of the shaft and disposed above the upper portion of the gas flow path located horizontally in the valve stem housing, Thereby opening and closing the gas flow path.

Preferably, the horizontal gas flow path of the valve stem housing includes a first inner diameter portion located on the front end side, a valve stem housing having one end connected to the first inner diameter portion and the other end vertically positioned, A diameter of the first inner diameter portion is formed to be larger than a diameter of the second inner diameter portion and a step is formed at a connecting portion between the first inner diameter portion and the second inner diameter portion, Is configured to move up and down in a state of being in contact with the stepped portion.

The safety device for blocking the flow path of the portable gas container according to the present invention is provided so that the shaft for blocking the flow path to the valve stem is not installed along the flow path to the valve stem but is installed separately, , The shaft is operated by the pressure difference between the atmospheric pressure and the gas container through the hole formed in the mounting cup, thereby blocking the gas flow path to the valve stem. Therefore, when the pressure in the portable gas container rises above a certain level, the separately installed shaft moves to shut off the gas flow path through the valve stem, so that the gas can not be discharged toward the valve stem, thereby preventing the explosion and fire of the gas container. .

1 is a view showing a state where the safety device of the first embodiment is fastened to a mounting cup.
2 is a cross-sectional view showing a state before the safety device of the first embodiment operates.
3 is a cross-sectional view showing a state in which the safety device of the first embodiment operates to shut off the gas flow path.
4 is a view showing the shaft of the safety device of the first embodiment.
5 is a view showing a stopper.
6 is a view showing a second gasket.
7 is a view showing a state in which the safety device of the second embodiment is fastened to the mounting cup.
8 is a cross-sectional view showing a state before the safety device of the second embodiment operates.
9 is a cross-sectional view showing a state in which the safety device of the second embodiment operates to shut off the gas flow path.
10 is a view showing the shaft of the safety device of the second embodiment.

The technical feature of the flow-path-type safety device of the portable gas container according to the present invention is that when the pressure in the portable gas container becomes higher than a certain level, the pressure difference between the atmospheric pressure and the gas container is accurately detected, It is possible to prevent gas from being discharged by blocking the flow path, thereby preventing explosion and fire of the gas container.

When the pressure in the gas container becomes higher than the set pressure, the safety device for the flow path barrier according to the present invention does not eject the overpressure gas at a time but blocks the gas flow path 312 supplied to the valve stem 20, The fire is shut off to lower the pressure in the gas container to prevent the gas container from exploding.

The safety device 30 includes a housing 31 in which a valve stem housing 311 and a safety device housing 313 are integrally formed, first to third gaskets 33, 34 and 35, a safety device housing 313, A spring 37 to be fitted to the shaft 32, and a stopper 36. The stopper 36 is provided on the shaft 32,

The valve stem housing 311 is integrally formed with the valve stem housing 311 and the safety housing 313. The valve stem housing 311 is formed with an L-shaped gas flow channel 312, 312 through the valve stem 20 coupled to the upper end. In addition, the safety device housing 313 is constituted by a large-diameter portion 313a having a large diameter and a small-diameter portion 313b having a relatively small diameter, and arranged in a vertical direction. In the specification of the present invention, "vertical direction" means the longitudinal direction of the gas container, and "horizontal direction" means width direction of the gas container, that is, direction perpendicular to the vertical direction.

The horizontal gas flow path 312 of the valve stem housing 311 is formed so as to intersect with the safety device housing 313. The large diameter portion 313a of the safety device housing 313 is connected to the horizontal direction gas The small diameter portion 313b is located below the large diameter portion 313a and the lower end of the small diameter portion 313b of the safety device housing is positioned above the horizontally located gas flow passage 311 of the valve stem housing 311. [ 312) (see Fig. 2).

The first gasket 33 is made of an elastic rubber material and has a hole formed at the central portion so as to penetrate in the vertical direction. The outer peripheral surface of the lower end portion is inserted into the inner peripheral surface of the upper end portion of the large- And the upper end thereof is mounted in close contact with the outer periphery around the hole 12 formed in the mounting cup 10 to seal the gas in the gas container from being discharged through the hole 12.

The shaft 32 has an upper protrusion 322 and a lower protrusion 325 at both ends of a rod-shaped main body 321 and is formed between the upper protrusion 322 and the lower protrusion 325 (See Fig. 4). The spring stopping protrusion 323 and the stopping protrusion 324 are formed on the spring stopping protrusion 323 (see Fig. 4). Not only the lower end of the spring 37 is supported but also the overpressure is generated in the gas container so that the shaft 32 rises and the third gasket 35 reaches the valve stem The spring support protrusion 323 comes into contact with the lower end of the stopper 36 to prevent the shaft 32 from rising any more and the gas flow channel 312 is completely blocked.

As shown in Fig. 5, the stopper 36 is made of a synthetic resin and positioned at the lower portion of the first gasket 33. The stopper 36 is cylindrical in shape and opened in the lower portion thereof, The upper surface of the first gasket 33 is in close contact with the lower surface of the first gasket 33. The outer surface of the side wall of the first gasket 33 is in contact with the upper surface of the side wall, And is disposed so as to be in close contact with the inner peripheral surface of the large-diameter portion 313a of the housing. The upper protrusion 322 of the shaft 32 is inserted and inserted into the through hole formed in the upper center of the stopper 36. In order to facilitate insertion of the shaft 32 into the through hole, It is preferable that a space is further formed in the portion facing the light emitting diode.

A tuck is formed in the lower end portion of the outer circumferential surface of the side wall and a protrusion corresponding to the inner circumferential surface of the large diameter portion 313a of the safety device housing 313 is formed for the secure positioning and function of the stopper 36, It is preferable that the stopper 36 can be fixed in position between the lower end of the first gasket 33 and the jawed portion of the large diameter portion 313a while reliably mounting the inner diameter of the large diameter portion 313a of the housing 313 (See Figs. 2 and 3).

The spring 37 is fitted in the shaft main body 321 and is positioned between the upper inner side surface of the stopper 36 and the spring support step 323 of the shaft. When the pressure in the gas container is normal, So that the second gasket 34 is brought into close contact with the upper surface of the horizontal portion of the gas flow path 312 of the valve stem housing to secure the gas flow path 312 connected to the valve stem 20.

On the other hand, when the pressure in the gas container rises above the set pressure, the gas pressure acts to compress the spring 37, causing the shaft 32 to rise. As the shaft 32 rises, The third gasket 35 located between the lower protrusion 325 and the lower protrusion 325 also rises and blocks the gas flow path 312 supplied to the valve stem 20 to block the gas spouting. Therefore, the outer diameter of the third gasket 35 should be larger than the inner diameter of the gas passage 312 located in the horizontal direction of the valve stem housing 311. [

The second gasket 34 is fitted in the shaft 32 and is disposed between the lower portion of the spring bearing base 323 of the shaft and the upper portion of the horizontally positioned gas flow passage 312 of the valve stem housing 311, (34) is made of a rubber material and has a cylindrical shape, and a hole penetrating the upper and lower portions is formed at the central portion so that the shaft (32) penetrates the upper portion. (See Fig. 6). The protrusion thus formed is brought into close contact with the inner surface of the large-diameter portion 313a of the safety device housing.

The third gasket 35 is sandwiched between the engaging protrusion 324 of the shaft 32 and the lower protrusion 325 to be positioned at the small diameter portion 313b of the safety device housing and when the pressure in the gas container is normal, (See FIG. 2). However, when the pressure in the gas container rises to a predetermined level or higher, the third gasket 314 is lifted along with the upward movement of the shaft 32, The third gasket 35 closes the horizontally located gas passage 312 of the valve stem housing 311 to block the gas supply to the valve stem 20.

A notch 11 is formed in the mounting cup 10 of the gas container so that the gas container can be mounted on the portable gas cooking stove. The hole 12 formed in the mounting cup 10 is inserted into the mounting cup 10, The mounting cup 10 can be easily mounted to the safety device of the present invention.

The operation of the flow-path-type safety device according to the present invention constructed as described above will be briefly described. When the pressure in the gas container is normal, the elastic force of the spring 37 of the safety device is balanced with the pressure difference in the gas container and the atmospheric pressure on the side of the hole 12 formed in the mounting cup, The channel of the flow path 312 is secured and normal gas is supplied to the valve stem 20 (see FIG. 2).

However, when the pressure in the gas container rises to a predetermined pressure or more and overpressure occurs, if the overpressure gas pushes up the lower surface of the second gasket 34, the spring 37 of the safety device is compressed and the second gasket 34 The shaft 32 is raised and the third gasket 35 is lifted together with the shaft 32 so that the third gasket 35 blocks the horizontally located gas flow path 312 of the valve stem housing 311, 20) (see Fig. 3).

In addition, when the pressure in the gas container falls below a predetermined value and becomes stable, the shaft 32 is lowered by the elastic force of the spring 37 and the third gasket 35 returns to the original position as shown in FIG. 2 And the gas flow path 312 secures the gas flow path.

Another embodiment of the safety device will be described with reference to Figs. In other embodiments, the shape and operation of the first and second gaskets 33 'and 34', the stopper 36 'and the spring 37' are the same as those of the previously described embodiment, .

The housing 31 'has a valve stem housing 311' formed with an L-shaped gas flow path and a safety device housing 313 'provided on a side surface of the valve stem housing 311' The device housing 313 'is located only in the upper part of the gas flow path 312' formed in the horizontal direction and has a hole in the upper part of the horizontal gas flow path 312 'of the valve stem housing 311' ').

The horizontal gas flow path 312 'of the valve stem housing 311' includes a first inner diameter portion 312a 'positioned at the tip end and a second inner diameter portion 312b' connected at one end to the first inner diameter portion 312a ' And a second inner diameter portion 312b 'connected to the valve stem housing 311' whose other end is located in the vertical direction. The diameter of the first inner diameter portion 312a 'is larger than the diameter of the second inner diameter portion 312b' And a step is formed at a connecting portion between the first inner diameter portion 312a 'and the second inner diameter portion 312b' so that the diameter of the flow path stopping jaw 326 'formed on the shaft 32' And the flat portion moves in the vertical direction in a state of being contacted with the stepped portion of the gas channel 312 '.

The shaft 32 'is inserted into the safety device housing 313' and the shaft 32 'has an upper protrusion 322' formed at the upper end of the rod-shaped body 321 ' And a spring stopping protrusion 323 'is formed at a predetermined distance below the upper protrusion 322' and a flow blocking stop 326 'is formed at a lower end of the main body 321' And a through hole 327 'communicating with the gas passage 312' is formed in the flow passage blocking step 326 '. The diameter of the flow path stopping jaw 326 'is larger than the diameter of the main body 321' and the second gasket 34 'is positioned between the spring stopping jaw 323' and the flow path stopping jaw 326 ' The diameter of the hole 327 'is equal to the diameter of the second inner diameter portion 312b'.

When the pressure in the gas container becomes higher than the set pressure, the spring 32 'is moved upward while the spring 37' is being compressed, so that the flow of the oil in the gas passage 312 ' The through hole 327 'formed in the blocking trench 326' is shifted in height from the second inner diameter portion 312b 'of the gas passage 312' and the through hole 327 'and the second inner diameter portion 312b' And the gas flow path 312 ', which is supplied to the valve stem, is blocked to block gas spouting.

The flow path stopping jaw 326 'formed on the shaft 32' is formed to have a larger diameter than the main body 321 ', and has a planar shape with one side being flat. The through hole 327 'is formed because the planar portion of the flow path stop jaw 326' is assembled to be in contact with the end portion of the first and second inner diameter portions 312a 'and 312b' of the gas flow path 312 ' The second inner diameter portion 312b 'is closed and the flow path is blocked. At this time, an O-ring 35 'is inserted between the planar portion of the flow path stopping jaw 326' and the second inner diameter portion 312b 'at the end portion of the gas flow path 312' .

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention. Various modifications and variations will be possible without departing from the spirit of the invention. Therefore, the scope of the present invention should be construed as being covered by the scope of the appended claims, and technical scope within the scope of equivalency thereof should be construed as being included in the scope of the present invention.

10: Mounting cup 11:
12: Hall
20: Valve stem
30, 30 ': safety device 31, 31': housing
311, 311 ': valve stem housing 312, 312'
313, 313 ': Safety device housing
32, 32 ': shaft 321, 321'
322, 322 ': upper protrusions 323, 323': a spring-
324: Retaining jaw 325: Lower jaw
326 ': Through-hole jaw 327': Through hole
33, 33 ': first gasket 34, 34': second gasket
35: Third gasket 35 ': O-ring
36, 36 ': stopper 37, 37': spring

Claims (11)

A flow-path-type safety device for shutting off gas flow supplied to a valve stem when a pressure in a gas container becomes higher than a set pressure,
In the above-described flow-path-type safety device,
A valve stem housing in which an L-shaped gas flow path is formed, and a safety device housing formed of a large-diameter portion and a small-diameter portion and installed in a vertical direction are integrally formed, and the horizontal gas flow path of the valve stem housing crosses the safety device housing And a lower end of the safety device housing is positioned below the gas flow path of the valve stem housing;
A first gasket mounted between the upper portion of the safety device housing and a hole formed in the mounting cup;
The upper protrusion and the lower protrusion are formed at both ends of the rod-shaped main body, the spring protrusion protrusion and the protrusion are formed between the upper protrusion and the lower protrusion, and inserted into the safety device housing A shaft to be disposed;
A stopper disposed at a lower portion of the first gasket, the stopper being inserted through a center portion of the shaft and having an outer circumferential surface closely contacted with an inner circumferential surface of the safety device housing;
A spring fitted to the shaft and provided between the stopper and the spring bearing jaw of the shaft;
A second gasket sandwiched between the shaft and the lower portion of the spring base of the shaft and between the upper portion of the horizontally located gas flow path of the valve stem housing;
A third gasket interposed between the shaft and the small-diameter portion of the safety device housing, the third gasket being positioned between the engagement protrusion of the shaft and the lower protrusion;
And the third gasket is configured to open and close the gas flow path as the shaft moves in the vertical direction.
A flow-path-type safety device for shutting off gas flow supplied to a valve stem when a pressure in a gas container becomes higher than a set pressure,
In the above-described flow-path-type safety device,
A valve stem housing in which an L-shaped gas flow path is formed and a safety device housing provided on a side surface of the valve stem housing are integrally formed and a hole is formed in the upper part of the horizontal gas flow path of the valve stem housing, A housing configured to communicate;
A first gasket mounted between the upper portion of the safety device housing and a hole formed in the mounting cup;
An upper protrusion is formed on an upper end portion of a rod-like body, a spring support protrusion is formed on a lower portion of the upper protrusion, a flow blocking protrusion is formed on a lower end portion of the main body, A shaft inserted into the safety device housing and having a through hole formed therein to communicate with a gas flow path;
A stopper disposed at a lower portion of the first gasket, the stopper being inserted through a center portion of the shaft and having an outer circumferential surface closely contacted with an inner circumferential surface of the safety device housing;
A spring fitted to the shaft and provided between the stopper and the spring bearing jaw of the shaft;
A second gasket sandwiched between the shaft and the lower portion of the spring base of the shaft and between the upper portion of the horizontally located gas flow path of the valve stem housing;
And the flow path blocking jaw of the shaft opens and closes the gas flow path as the shaft moves in the vertical direction.
3. The method according to claim 1 or 2,
Wherein a hole formed in the mounting cup is formed on a line connecting the center of the mounting cup and the notch.
The method according to claim 1,
When the pressure in the gas container becomes higher than the set pressure, the shaft is compressed while the spring is compressed, and the third gasket mounted between the engagement protrusion and the lower protrusion of the shaft blocks the gas flow supplied to the valve stem, Wherein the gas-barrier safety device is a gas-barrier type safety device of a portable gas container.
The method according to claim 1,
And the outer diameter of the third gasket is larger than the inner diameter of the gas passage of the valve stem housing.
3. The method according to claim 1 or 2,
The upper stopper of the shaft is inserted and inserted into the through hole. The upper protrusion of the shaft is inserted into the through hole,
Wherein a side wall having a space at regular intervals in an up-and-down direction along an edge thereof is provided, and an outer circumferential surface of the side wall is closely attached to an inner circumferential surface of the safety device housing.
The method according to claim 6,
A stopper is formed on an inner circumferential surface of the safety device housing. A stopper is mounted on the lower end of the first gasket and a jaw of the safety device housing. And the position of the gas passage can be fixed between the free ends.
3. The method according to claim 1 or 2,
The second gasket has a cylindrical shape and a hole penetrating the vertical direction is formed at a central portion of the second gasket so that the shaft penetrates the upper portion of the second gasket and a protrusion having a hemispherical cross- Wherein the safety device is a flow-path-type safety device for a portable gas container.
3. The method of claim 2,
The horizontal direction gas flow path of the valve stem housing includes a first inner diameter portion located at the tip end side and a second inner diameter portion connected at one end to the first inner diameter portion and connected to the valve stem housing whose other end is positioned in the vertical direction 2 < / RTI > inner neck,
A stepped portion is formed at a connecting portion between the first inner diameter portion and the second inner diameter portion so that a flat portion of the flow path cutout jaw formed in the shaft is formed in a step Wherein the movable member is configured to move in the vertical direction while being in contact with the binary portion.
10. The method of claim 9,
Wherein the flow path blocking step formed on the shaft has a planar shape at one side and a planar portion of the flow path blocking step is assembled so as to be in contact with the end portions of the first and second inner diameter portions of the gas flow path,
Wherein an O-ring is inserted between a flat portion of the flow path stop jaw and an end portion of the gas flow path.
11. The method of claim 10,
When the pressure in the gas container becomes higher than the set pressure, the shaft is compressed while the spring is compressed so that the through hole formed in the flow path blocking jaw of the shaft is blocked from communicating with the second inner diameter portion of the gas flow path, And the gas flow path is shut off to block the gas spouting.

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