KR102092874B1 - A safety device that uses a shape memory alloy to close the flow path of the valve housing to prevent explosion of the portable gas container - Google Patents

Abstract

The present invention is to provide a safety apparatus for preventing explosion of a portable gas container by closing a flow path of a valve housing using shape memory alloy. The safety apparatus of the present invention does not install a separate safety valve housing for discharging an overpressure gas when the temperature in the portable gas container rises above a certain level, but inserts and installs a shaft and an SMA spring, which close the flow path for discharging gas toward a valve stem, into a vertical flow path of the valve housing. Therefore, the safety apparatus of the present invention has a simple structure and a small number of parts, so that assembly thereof is very easy and simple.

Description

A safety device that uses a shape memory alloy to close the flow path of the valve housing to prevent explosion of the portable gas container}

The present invention relates to a safety device for preventing explosion of a portable gas container, and more specifically, a shaft operated by a shape memory alloy installed in a vertical flow path of a valve housing to close a flow path through which gas is discharged toward the valve stem. Safety to prevent the explosion of the portable gas container by closing the flow path of the valve housing using a shape memory alloy that prevents the gas from being discharged and prevents the explosion and fire of the gas container when the temperature in the gas container rises above a certain level. It is about the device.

A portable gas container that is used by filling a mixture of butane gas as the main raw material and attaching it to a portable gas stove receives high heat from the surroundings during distribution or use, and the pressure of the liquefied gas contained in the gas container increases. If it is exposed to high temperature by using it irregularly without following safety rules, the internal pressure will increase, which may explode if the container is deformed or severe. Therefore, it is determined by law on the pressure that a portable gas container can withstand and deform.

Until now, the technology that emerged in relation to the safety of portable gas containers was that most of the safety valves were installed to discharge overpressure when the pressure in the gas container increased above a certain level. In this regard, the applicant (inventor) of the present invention also has many technologies. Has been developed and patented and applied to actual products. For example, Patent Registration No. 1064633 "Safety Valve for Portable Gas Containers", Patent Registration No. 1261536 "Safety Valve for Portable Gas Containers with Overpressure Prevention", Patent Registration No. 1464493 "Explosion Prevention of Portable Gas Containers" Safety valve for overpressure discharge "and the like.

In recent years, when the pressure in the portable gas container rises above a certain level, a technology has been developed to block the gas discharge itself by closing the gas flow path, rather than discharging the overpressure. Patent registration No. 161825 "Safety device for preventing gas discharge from gas cylinder" , Patent registration No. 1572622 and No. 1572626 "gas container safety device". The above patents are a technology that prevents the gas container from exploding by closing the flow path to the valve stem to shut off the fire around the gas container when overpressure occurs in the gas container to lower the pressure in the gas container.

However, when the gas container is mounted on a portable gas stove in use, the pressure is always the same inside the gas container and the inside of the gas container that regulates the pressure and flow rate of the gas from the gas container, and no differential pressure is generated. In addition, in the above patents to block the flow path in the event of overpressure, a movable valve (blocking valve) for blocking a flow path to the valve stem is installed in the flow path to the valve stem, and the movable valve (blocking valve) has a gas on the governor side. It is installed to move within the flow path due to the pressure difference inside the container, but there is a fatal problem that the gas flow path to the valve stem cannot be blocked because the pressure difference in the gas container during use rises above a certain level.

In addition, the safety device when the overpressure occurs in the container because the spring supporting the shaft is made of ordinary metal and is supported only on one side of the shaft. In order to operate, one side of the safety valve must always be connected to the outside so that a differential pressure is generated to enable operation. However, if a foreign material is accumulated or damaged in the external passage, a problem may occur in the safety valve operation, and there is a fatal problem that gas may easily leak to the outside when assembly is poor due to a large number of components.

In order to solve the above problems, the applicant (inventor) of the present invention developed a flow path blocking safety device using a shape memory alloy and applied for patent applications 2017-111937 and patent applications 2018-134864. When the pressure rises above a certain level, the flow path is completely blocked to ensure safety, and the structure is simple and the number of parts is small, which makes assembly very easy and simple.

The present invention has been devised to solve the above problems, and an object of the present invention is to insert and install in a vertical flow path of a valve housing when the temperature in the gas container rises above a certain value, a shape memory alloy (SMA). , In this specification, the shaft operated by 'SMA') closes the flow path through which the gas is discharged toward the valve stem to prevent the gas from being discharged, thereby blocking the fire around the gas container to prevent explosion and fire. , It is to provide a safety device to prevent the explosion of the portable gas container by closing the flow path of the valve housing using a shape memory alloy.

Another object of the present invention, without installing a separate safety valve housing for discharging the overpressure gas, the structure by inserting the shaft and the SMA spring to close the flow path through which the gas is discharged toward the valve stem into the vertical flow path of the valve housing, This is to provide a safety device that prevents explosion of the portable gas container by closing the flow path of the valve housing using a shape memory alloy, which is simple and easy to assemble due to the small number of parts.

Another object of the present invention, by forming a longer length of the normal spring and the stroke through which the valve stem flows to support the valve stem to the valve housing, the shaft is operated to close the flow path through which gas is discharged toward the valve stem. Afterwards, the top of the valve stem of the gas container separated from the gas stove was pressed to return the shaft to its pre-operation state, so that the gas container could be reused, and the shape of the valve housing was used to close the flow path of the valve housing to explode the portable gas container. It is to provide a safety device to prevent the.

The safety device for preventing the explosion of the portable gas container by closing the flow path of the valve housing using the shape memory alloy according to the present invention is provided with a horizontal flow path and a vertical flow path, and the vertical flow path is a cylindrical cylindrical portion with a bottom surface closed and At the upper part of the cylindrical portion, a stem coupling portion having a gas passage formed on the inner circumferential surface of the hollow portion is integrally formed, and a gas outlet is formed at the tip of the horizontal flow path where the tip of the horizontal flow path is connected to the vertical flow path. In the inner peripheral surface of the cylindrical portion of the vertical flow path, the undercut is protruded at a position lower than the height at which the gas outlet is formed, and the upper part of the stem coupling portion is assembled to the mounting cup and fixedly installed in the valve housing; A cylindrical stem, a coupling portion inserted into and coupled to the stem coupling portion of the valve housing at the lower portion of the stem, a groove portion having a diameter smaller than the outer diameter of the stem at the portion where the stem and the coupling portion are connected, and gas leaking through the stem A valve stem configured to have an orifice formed in the groove portion; A pillar-shaped body portion, a gas-shaped portion in which a rod shape radially protrudes in the vicinity of the upper end of the body portion, and an end portion of the valve housing is in contact with the inner circumferential surface of the valve housing, and a cup shape in which the upper portion is opened near the bottom of the body portion. And a shaft formed with a sealing part that is formed on a top outer circumferential surface and is in contact with the inner circumferential surface with a vertical flow path; SMA springs are fitted to the outer circumferential surface of the main body portion located below the sealing portion of the shaft, so that both ends are supported and positioned between the bottom of the sealing portion of the shaft and the bottom surface of the vertical flow path, respectively; It is composed of a general spring inserted between the bottom of the coupling portion of the valve stem and the bottom surface of the stem coupling portion of the vertical passage to support the valve stem. When the temperature in the gas container rises above a certain level, the length of the SMA spring is increased. It is characterized in that the shaft rises as it changes so that the sealing portion of the shaft operates to close the vertical flow path.

Preferably, the sealing portion of the shaft is provided with a sealing portion having a cylindrical shape and a top surface inclined instead of an open cup shape.

Preferably, an O-ring is further inserted between the upper end of the SMA spring and the lower end of the shaft, and a ring-shaped base may be further inserted between the upper end of the SMA spring and the O-ring. .

Preferably, the gas distribution portion of the shaft is formed with two to four rod-shaped radial projections around the body portion.

Preferably, the cross-sectional shape of the gas outlet formed at the tip of the horizontal flow path of the valve housing is a rectangular shape having a long length in the horizontal direction, and the tip of the gas outlet is formed to coincide with the inner peripheral surface of the cylindrical portion of the vertical flow path.

Preferably, the undercut formed on the inner peripheral surface of the cylindrical portion of the vertical flow path of the valve housing is formed at a position lower than the position of the gas outlet.

Preferably, the valve stem has a cylindrical stem, a coupling portion inserted into and coupled to the stem coupling portion of the valve housing at the lower portion of the stem, and an orifice for supplying gas so that gas flows out through the stem. Instead of being formed in the groove, it is formed and formed in the lower part of the stem; The length of the normal spring and the height of the inner circumferential surface of the hollow portion of the stem coupling portion are formed to be longer than the height of the inner circumferential surface of the hollow portion of the safety device configured with a groove in the valve stem.

Preferably, when the temperature in the gas container is normal and when the gas is discharged toward the valve stem through the gas outlet, the spaced distance between the lower surface of the coupling portion of the valve stem and the upper surface of the main body of the shaft is the top surface of the shaft-shaped cup top It is the same as the distance between the upper end of the gas outlet formed at the front end of the horizontal flow path and the position where the protrusion formed in the abutment of the inner circumferential surface of the vertical flow path.

Preferably, the temperature in the gas container rises above a certain level, and the SMA spring operates to raise the shaft, thereby closing the vertical flow path toward the valve stem to block the gas discharge, and the temperature falls again, so the pressure in the gas container is normal. When it recovers to, remove the gas container from the gas range and press the top of the stem of the valve stem to descend the protrusion formed on the outer circumferential surface of the top of the cup shape of the shaft to the bottom of the undercut to secure the flow path through which the gas is discharged toward the valve stem and gas It is configured to reuse the container.

The safety device of the portable gas container according to the present invention does not form a separate overpressure gas discharge hole in the mounting cup or a separate safety valve housing for discharging the overpressure gas, and closes a flow path through which gas is discharged toward the valve stem Since the shaft and the SMA spring are inserted and installed in the vertical flow path of the valve housing, the structure is simple and the number of parts is very easy to assemble, so the manpower and time for assembly are significantly reduced and manufacturing cost is also reduced.

In addition, when the temperature in the gas container rises above a certain level, when the length of the SMA spring is increased and a force is applied to the shaft, the shaft moves within the vertical flow path of the valve housing to block the flow path through which gas is discharged toward the valve stem. For this reason, the overpressure vaporization gas discharge in the gas container is reliably blocked and in the state of extinguishing, so that the explosion and fire of the gas container can be fundamentally prevented.

In addition, since the length of the general spring supporting the stem to the valve housing and the stroke through which the valve stem flows are formed slightly longer, the temperature in the gas container rises above a certain level to close the flow path through which the gas is discharged toward the valve stem. After the shaft is operated, when the user presses the top of the valve stem of the gas container separated from the gas stove to return the shaft to the pre-operation state, the flow path through which the gas is discharged is opened to reuse the gas container.

1A is a view showing a structure when a gas is normally discharged in a first embodiment of a safety device according to the present invention.
FIG. 1B is a view showing the structure when the gas discharge is blocked by the operation of the safety device in FIG. 1A.
1C and 1D are views showing a gas outlet and an undercut formed in a portion where the horizontal flow path and the vertical flow path are combined in the first embodiment.
2A and 2B are views respectively showing structures when gas is normally discharged and a safety device is operated to block gas discharge in the second embodiment of the safety device according to the present invention.
3A is a view showing a state before using a gas container in a third embodiment of the safety device according to the present invention.
3B is a view showing a structure when the gas is normally discharged in FIG. 3A.
Figure 3c is a view showing the structure when the gas discharge is blocked by the operation of the safety device in Figure 3b.
3D is a view showing a state in which the flow path is opened by pressing the stem to reuse the gas container in FIG. 3C.

Technical features of the safety device of the portable gas container according to the present invention, first, by installing a shaft closing the flow path of the gas discharged toward the valve stem inside the valve housing, a separate safety valve for discharging the overpressure gas Because it is not installed, the structure is simple and the number of parts is small, making assembly very easy.

Second, after the shaft is operated to close the flow path through which the gas is discharged toward the valve stem, the upper portion of the gas stem separated from the gas stove is pressed to open the flow path through which the gas is discharged so that the shaft returns to the pre-operation state. It made the container reusable.

The safety device according to the present invention discharges gas through the stem 13 installed through the central portion of the mounting cup 40 coupled to the upper end of the gas container, and when the temperature in the gas container becomes higher than the prescribed temperature The SMA spring 16 is operated to raise the shaft 15 to close the flow path through which the gas is discharged toward the valve stem 13, thereby blocking the gas discharge. It is necessary to install a separate safety valve to block the gas discharge. In addition, the structure is simplified by inserting and installing the shaft 15 on the vertical flow path 12 constituting the valve housing 10.

First, a first embodiment of a safety device according to the present invention will be described with reference to FIGS. 1A to 1D. The safety device includes a valve housing 10, a valve stem 13 for discharging gas, a shaft 15 for closing a flow path through which gas is discharged, an SMA spring 16 for operating the shaft 15, and a valve It comprises a general spring (14) for supporting the stem (13). In the specification of the present invention, 'vertical direction' means the length direction of the gas container when the gas container and the mounting cup are combined, and 'horizontal direction' means the width direction of the gas container, that is, the direction perpendicular to the vertical direction.

The valve housing 10 includes a horizontal flow path 11 and a vertical flow path 12 in which a flow path through which gas is discharged is formed. The horizontal flow path 11 is a cylindrical shape located in a horizontal direction, and the vertical flow path 12 is A cylindrical cylindrical portion 121 with a closed bottom surface and a stem coupling portion 122 having a plurality of gas passages 123 formed at equal intervals in the vertical direction on the inner circumferential surface of the hollow portion above the cylindrical portion 121. It is integrally formed, and the gas outlet 111 is formed at the tip of the horizontal flow path 11 in a portion where the front end of the horizontal flow path 11 is connected to the vertical flow path 12. In addition, the inner circumferential surface of the cylindrical portion 121 of the vertical flow path 12 has an undercut 124 protrudingly formed at a position lower than the height at which the gas outlet 111 is formed, and an upper portion of the stem coupling portion 122 is mounted on the mounting cup 40 ) And fixed installation.

The cross-sectional shape of the gas outlet 111 formed at the tip of the horizontal passage 11 of the valve housing is a rectangular shape having a long length in the horizontal direction, and the tip of the gas outlet 111 is a cylindrical portion 121 of a vertical passage It is formed to coincide with the inner circumferential surface, and, of course, the cylindrical portion 121 of the vertical flow path must be drilled in the same manner as the shape of the gas outlet 111 (see FIGS. 1C and 1D).

The undercut 124 formed on the inner circumferential surface of the cylindrical portion 121 of the valve housing is formed at a position lower than the position of the gas outlet 111, and the undercut 124 is equally spaced along the inner circumferential surface of the cylindrical portion 121. It may also be formed to protrude at four places, or may be formed to continuously protrude at the same height along the inner circumferential surface of the cylindrical portion 121. Since the undercut 124 is formed to protrude, when the temperature in the gas container is normal, the upper portion of the sealing portion 153 of the shaft is caught by the undercut 124, thereby ensuring a stable gas flow path.

The valve stem 13 has a cylindrical stem 131 and a coupling portion 132 inserted into and coupled to the stem coupling portion 122 of the valve housing under the stem 131, and the stem 131 and coupling portion It is composed of a groove 133 formed smaller in diameter than the outer diameter of the stem 131 at a portion to which the 132 is connected, and an orifice 134 formed in the groove 133 so that gas flows out through the stem 131. (See Figures 1A, 1B). Reference numeral 41 is a gasket inserted between the top of the center of the mounting cup 40 and the top of the stem coupling portion 122 of the valve housing to prevent gas from leaking around the stem 131.

The shaft 15 has a pillar-shaped main body portion 151 and a rod-shaped protruding radially near the upper end of the main body portion 151 so that the end portion is in contact with the inner circumferential surface of the cylindrical portion 121 as a vertical flow path of the valve housing. The gas distribution portion 152 is formed, and the upper portion is opened in the vicinity of the lower end of the main body portion 151, and a protrusion (not designated) is formed on the outer circumferential surface of the upper portion, so that the vertical flow path comes into contact with the inner circumferential surface of the cylindrical portion 121. It is provided with a portion 153 (see FIGS. 1A and 1B). The gas distribution portion 152 of the shaft is radially centered around the main body portion 151, and 2 to 4 rod shapes are formed to protrude at equal intervals, thereby ensuring sufficient space for gas to flow between the rod shapes. In addition, the sealing portion 153 is not only to have elasticity because the upper portion is an open cup shape, but also has a protrusion formed on the outer circumferential surface of the top of the cup, so that the flow path is reliably sealed when it is in close contact with the inner circumferential surface of the cylindrical portion 121 of the vertical passage. It can be made (see Fig. 1b).

SMA spring 16 is fitted to the outer circumferential surface of the body portion 151 located below the sealing portion 153 of the shaft, so that both ends have a bottom surface of the vertical flow path 12 with the lower end of the sealing portion 153 of the shaft. Each is supported and positioned between them.

The shape memory alloy (SMA) reacts at a certain temperature or higher, and once again below a certain temperature, the original shape, i.e., one-way property that does not recover to its original state and completely loses its reactivity (a bidirectional property that recovers to its original state when the temperature drops) The SMA spring 16 is a special alloy with properties), and the SMA spring 16 used in the present invention increases the length of the SMA spring 16 when the temperature in the gas container rises above a set temperature and seals the shaft. Since the force is applied to the lower portion 153, the sealing portion 153 of the shaft rises past the undercut 124 where the shaft sealing portion 153 protrudes and passes through the gas outlet 111, so that the sealing portion 153 of the shaft is a vertical passage 12 It operates to block the gas discharge by closing the gas, and the shaft 15 further rises due to gas pressure, so that the upper end of the main body portion 151 comes into contact with the lower end of the coupling portion 132 of the valve stem. Chuge is (see Fig. 1b).

The general spring 14 is a coil spring made of a general metal, not a shape memory alloy, and is inserted between the bottom of the coupling portion 132 of the valve stem and the bottom surface of the stem coupling portion 122 of the vertical flow path to open the valve stem 13. It is a supporting structure.

When the sealing part 153 closes the flow path to block gas discharge, an O-ring 17 is provided between the upper end of the SMA spring 16 and the lower end of the sealing part 153 of the shaft to make the sealing more secure. You can also insert more. In addition, the ring-shaped support is provided between the top of the SMA spring 16 and the O-ring 17 so that the rubber O-ring 17 is reinforced with sealing while preventing damage to the top of the SMA spring 16 made of metal. (18) can be further inserted.

A second embodiment of the safety device according to the present invention will be described with reference to FIGS. 2A and 2B. The second embodiment differs from the first embodiment in the shape of a seal formed near the lower end of the shaft. The structure of the other parts except for the sealing part 253 is the same as that of the first embodiment, so a duplicate description is omitted, and only the sealing part 253 will be described. In the second embodiment, reference numerals starting with '2' are used.

The sealing portion 253 of the second embodiment is provided with a shape in which the cross section has a cylindrical shape and the upper surface is inclined instead of the cup shape in which the upper side is opened in the first embodiment. The operation and function of the sealing portion 253 are the same as the sealing portion 153 of the first embodiment.

A third embodiment of the safety device according to the present invention will be described with reference to FIGS. 3A to 3D. The third embodiment is intended for reuse when the temperature in the gas container is normal, and the third embodiment differs from the first embodiment in that the structure of the valve stem, the length of the general spring, and the height of the inner peripheral surface of the hollow portion of the stem coupling portion to be. The structure of the other parts except the height of the inner circumferential surface of the hollow portion of the valve stem 33 and the general spring 34 and the stem coupling portion 322 is the same as in the first embodiment, so a redundant description is omitted. In the third embodiment, reference numerals beginning with '3' are used.

The valve stem 33 of the third embodiment does not have a groove portion 133 as compared to the valve stem 13 of the first embodiment. That is, the valve stem 33 is inserted through the stem 331 of the cylindrical shape, the coupling portion 332 inserted into the stem coupling portion 322 of the valve housing under the stem 331, and the stem 331 It has an orifice 334 for supplying gas so that the gas flows out, the orifice 334 is formed in the lower portion of the stem 331. In addition, a protrusion (not designated) is formed on the upper portion of the coupling portion 332 to prevent gas leakage, so that the projection is coupled to contact the lower portion of the gasket 41 '.

 The third embodiment is to reuse the gas container when the temperature in the gas container rises above a certain level and then returns to normal. In order to reuse, the stroke, which is the moving distance of the valve stem 33, must be lengthened. The length of the example general spring 34 and the height of the inner peripheral surface of the hollow portion of the stem coupling portion 322 are formed longer than the height of the inner peripheral surface of the hollow portion 14 and the stem coupling portion 122 of the first embodiment.

When the temperature in the gas container is normal and the gas is discharged toward the valve stem 33 through the gas outlet 311, the spaced distance between the lower surface of the coupling portion 332 of the valve stem and the upper surface of the main body portion 351 of the shaft ( d) is between the upper end of the gas outlet 311 formed at the tip of the horizontal flow path 31 and the position where the protrusion formed on the outer circumferential surface of the cup-shaped upper end of the shaft 353 contacts the inner circumferential surface of the horizontal flow path 31. They are separated by a distance equal to the distance d (see FIG. 3B).

In addition, as the temperature in the gas container rises above a certain level, the SMA spring 36 operates, and as the shaft 35 rises, the sealing portion 353 closes the vertical flow path 32 toward the valve stem to block gas discharge. When the temperature falls again and the pressure in the gas container is restored to normal, the gas container is removed from the gas range and the upper end of the stem 331 of the valve stem is pressed to form a protrusion formed on the outer circumferential surface of the cup-shaped upper part of the shaft 353. The gas container can be reused by descending to the lower portion of the undercut 324 to secure a flow path through which gas is discharged toward the valve stem 33.

The above description is illustrative of the present invention, and the embodiments disclosed in the specification are not intended to limit the technical idea of the present invention, but are intended to explain the present invention. Various modifications and variations will be possible without departing from the technical idea of. Therefore, the protection scope of the present invention is to be interpreted by the matters described in the claims, and technical matters within the equivalent scope thereof should be interpreted to be included in the scope of the present invention.

10, 20, 30: valve housing
11, 21, 31: Horizontal flow path 111, 211, 311: Gas outlet
12, 22, 32: Vertical flow path 121, 221, 321: Cylindrical part
122, 222, 322: stem coupling part 123, 223, 323: gas passage
124, 224, 324: undercut
13, 23, 33: valve stem 131, 231, 331: stem
132, 232, 332: coupling portion 133, 233: groove
134, 234, 334: Orifice
14, 24, 34: General spring
15, 25, 35: shaft 151, 251, 351: main body
152, 252, 352: gas distribution section 153, 253, 353: sealing section
16: 26, 36: SMA spring
17, 27, 37: O-ring
18, 28, 38: pedestal
40: mounting cup 41: gasket

Claims (10)

In the safety device of the portable gas container to block the gas discharge by closing the flow path through which the gas is discharged toward the valve stem when the temperature in the gas container to be used mounted on the portable gas range becomes higher than the prescribed temperature,
The safety device,
A horizontal flow path and a vertical flow path are provided, and the vertical flow path is formed of a cylindrical cylindrical portion with a closed bottom surface, and a stem coupling portion having a gas passage formed on the inner circumferential surface of the hollow portion is integrally formed. A gas outlet is formed at the tip of the horizontal flow path of the portion where the tip is connected to the vertical flow path, and an undercut is protruded at a position lower than the height at which the gas outlet is formed on the inner circumferential surface of the cylindrical flow path, and the stem coupling portion A valve housing in which the upper part is assembled and fixed to the mounting cup;
A cylindrical stem, a coupling portion inserted into and coupled to the stem coupling portion of the valve housing at the lower portion of the stem, a groove portion having a smaller diameter than the stem outer diameter at the portion where the stem and the coupling portion are connected, and gas leaking through the stem A valve stem configured to have an orifice formed in the groove portion;
A pillar-shaped body portion, a gas-shaped portion in which a rod shape radially protrudes in the vicinity of the upper end of the body portion, and an end portion of the valve housing is in contact with the inner circumferential surface of the valve housing. And a shaft formed with a sealing part that is formed on a top outer circumferential surface and is in contact with the inner circumferential surface with a vertical flow path;
SMA springs are fitted to the outer circumferential surface of the main body portion located below the sealing portion of the shaft, so that both ends are supported and positioned between the bottom of the sealing portion of the shaft and the bottom surface of the vertical flow path, respectively;
A general spring inserted between the bottom of the coupling portion of the valve stem and the bottom surface of the stem coupling portion in a vertical flow path to support the valve stem;
It is configured to include, when the temperature in the gas container rises above a certain level, the valve housing using a shape memory alloy characterized in that the shaft rises while the length of the SMA spring changes and the sealing portion of the shaft operates to close the vertical flow path. Safety device to prevent explosion of portable gas container by closing the flow path.
According to claim 1,
The sealing portion of the shaft is a portable gas by closing the flow path of the valve housing using a shape memory alloy, characterized in that a sealing portion of a shape having a cylindrical shape and an inclined upper surface is installed instead of a cup shape with an open top. Safety device to prevent explosion of container.
The method according to claim 1 or 2,
A safety device for preventing explosion of the portable gas container by closing the flow path of the valve housing using a shape memory alloy, characterized in that an O-ring is further inserted between the upper end of the SMA spring and the lower end of the shaft.
According to claim 3,
A safety device for preventing the explosion of the portable gas container by closing the flow path of the valve housing using a shape memory alloy, characterized in that a ring-shaped base is further inserted between the top of the SMA spring and the O-ring.
The method according to claim 1 or 2,
The gas distribution part of the shaft is a safety device for preventing explosion of a portable gas container by closing a flow path of a valve housing using a shape memory alloy, characterized in that 2 to 4 rod shapes are formed to project radially around the main body.
The method according to claim 1 or 2,
The shape of the cross section of the gas outlet formed at the tip of the horizontal flow path of the valve housing is a rectangular shape having a long length in the horizontal direction, and the tip of the gas outlet is shaped to match the inner peripheral surface of the cylindrical portion of the vertical flow path. Safety device to prevent explosion of portable gas container by closing the flow path of valve housing using alloy.
The method according to claim 1 or 2,
The undercut formed on the inner circumferential surface of the cylindrical portion of the valve housing is formed at a position lower than the position of the gas outlet. A safety device for preventing the explosion of the portable gas container by closing the flow path of the valve housing using a shape memory alloy. .
According to claim 1,
The valve stem has a cylindrical stem, a coupling portion inserted into and coupled to the stem coupling portion of the valve housing at the lower portion of the stem, and an orifice for supplying gas to allow gas to flow out through the stem, wherein the orifice is formed in the groove portion Instead of being formed on the lower part of the stem,
The length of the general spring and the height of the inner circumferential surface of the hollow portion of the stem coupling portion are formed longer than the height of the inner circumferential surface of the hollow portion of the safety device, which is provided with a groove in the valve stem, and the valve housing using a shape memory alloy. Safety device to prevent explosion of portable gas container by closing the flow path.
The method of claim 8,
When the temperature in the gas container is normal and the gas is discharged toward the valve stem through the gas outlet, the spaced distance between the lower surface of the coupling portion of the valve stem and the upper surface of the main body of the shaft,
The valve housing using a shape memory alloy characterized in that the protrusion formed on the outer circumferential surface of the cup-shaped upper portion of the shaft contacts the inner circumferential surface of the vertical flow path and the distance between the upper end of the gas outlet formed at the tip of the horizontal flow path. Safety device to prevent explosion of portable gas container by closing the flow path.
The method of claim 8,
If the temperature in the gas container rises above a certain level and the SMA spring operates, the shaft rises, and the sealing part closes the vertical flow path toward the valve stem to block the gas discharge. time,
The gas container can be reused by separating the gas container from the gas range and pressing the top of the stem of the valve stem to lower the protrusion formed on the outer circumferential surface of the cup-shaped upper part of the shaft to the bottom of the undercut to secure the flow path through which gas is discharged toward the valve stem. A safety device that prevents explosion of the portable gas container by closing the flow path of the valve housing using a shape memory alloy characterized in that it is configured to.

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