KR100431590B1 - The hydrostat for portable gas range - Google Patents

Abstract

The present invention relates to an explosion-proof device for a portable gas range (1), wherein abnormal pressure is generated in the gas container (2) installed in the portable gas range, and the gas flow is blocked and extinguished by the container detachable safety device. It is a device that prevents the container from exploding due to an increase in the internal pressure caused by radiant heat or the like which continues afterwards.

More specifically, even after the pressure in the gas container 2 rises above a certain value and the gas container 2 is released by the existing container detachable safety device and the flame is extinguished, the internal pressure of the container continues to rise to increase the vessel deformation threshold pressure. It is a device that prevents the explosion of the gas container 2 by releasing the gas inside the container to the outside at the moment when the container is deformed.

More specifically, when the radiant heat emitted from the plate is larger than the latent heat of evaporation by the heat of vaporization as the gas is burned, it is added to the gas container 2 by the difference between the radiant heat and the latent heat of evaporation, and the gas pressure in the container gradually rises. Therefore, if the pressure of the container rises above a certain value, the container guide 4 moves backward by first moving the detachable lever 3 upward by the container detachable safety device so that the gas container 2 is separated from the governor valve 7. The flame is extinguished. That is, since the gas container 2 is separated from the governor valve 7 and the gas discharge is blocked, the latent heat of evaporation due to the vaporization heat disappears, so that the gas container 2 absorbs all the radiant heat emitted from the fire plate and the pressure rapidly increases. Will rise. When the internal pressure reaches the deflection pressure of the container, the bending portion of the container is deformed so that the container is in close contact with the governor valve 7 and the gas in the gas container 2 is discharged to the outside air through the explosion prevention device configured in the governor valve 7. It is a device to prevent the explosion of the container by being discharged to.

In other words, the inner pressure of the container is discharged to the outside immediately before the explosion of the gas container 2 to lower the internal pressure of the container, and the portable container is cooled to prevent the explosion of the gas container 2 by cooling the gas container with the latent heat of vaporization due to the vaporization heat. It relates to an explosion prevention device of the gas range (1).

Description

Explosion-proof device for a portable gas range {The hydrostat for portable gas range}

The present invention relates to an explosion-proof device for a portable gas range (1), and more particularly, the abnormal pressure is generated in the gas container (2) installed in the portable gas range, the gas flow is first blocked by the container detachable safety device. It is a device that prevents the container from exploding due to an increase in the internal pressure due to radiant heat or the like that continues even after extinguishing.

In general, a portable gas stove is a cooking utensil used for simply cooking meat or heating cooking utensils outdoors or indoors. The portable gas cooker is increasingly used for its users and range due to its portability and simplicity. Various safety devices are being developed to reduce the risk.

In general, in the case of a portable gas cooker, the gas is supplied from the gas cooker to the gas cooker during use, thereby lowering the temperature of the gas cooker by the latent heat of evaporation that takes the heat away from the gas as it is vaporized. Concerns are low.

However, the pot or cookware placed on the upper part of the portable gas stove is heated and radiant heat generated from the lower part is transferred to the gas container. As the gas container accumulates, the internal pressure of the gas container increases due to the expansion of the gas.

Therefore, according to the regulations of the Korea Gas Safety Corporation, the gas flow is regulated so that the gas flow is automatically shut off and extinguished within the range of 5 ~ 7kg / cm2. In Japan, the gas pressure is 4 ~ 6kg / It is regulated to extinguish the gas flow automatically in the range of cm2.

The safety device installed for this purpose is a container detachable safety device which blocks the gas flow by breaking the gas container from the governor inlet of the portable gas range within the internal pressure of the gas container within the range of 5-7 kg / cm2. The Euro-blocking safety device is designed to shut off the gas flow by blocking the flow path in the gas stove of the portable gas range within the internal pressure range of 4-6kg / cm2. .

The two safety devices are accumulated in the gas container by the difference between the radiant heat and the latent heat of evaporation when the radiant heat is greater than the latent heat of evaporation due to the vaporization heat of the gas. It is a safety device to prevent damage.

More specifically, the butane gas container used in a portable gas stove has a normal pressure in the range of 2 to 3 kg / cm2, the primary deformation pressure of the gas container is 13 kg / cm2, and the secondary burst pressure is 15 kg / cm2, that is, the gas container. It is regulated not to deform the container until the internal pressure is 13kg / cm2, and also to prevent the container from rupturing or exploding until the internal pressure is 15kg / cm2. In this case, the purpose is to prevent the explosion of the gas container by preventing the gas pressure from escalating to the explosive threshold range so that the gas flow can be extinguished by blocking the gas flow at an early stage within the range of 5-7 kg / cm2.

However, when the gas is burned and the radiant heat emitted from the plate is larger than the latent heat of vaporization by the heat of vaporization, the gas pressure in the container is gradually increased by adding to the gas container by the difference between the radiant heat and the latent heat of vaporization. Therefore, if the pressure of the container rises above a certain level, the flow path is blocked by the container detachable or flow-blocking safety device to extinguish the flame. That is, since the latent heat of evaporation due to vaporization heat disappears from the moment when the gas discharge of the gas container is blocked, the gas container absorbs all the radiant heat emitted from the fire plate and the pressure rises rapidly, so that the internal pressure passes the primary container deformation pressure and the secondary container. The burst pressure may be reached and the gas container may explode.

"5-1 Trivets" in "Section 5 Mobile Butane Combustor (Portable Gas Range) and Joining Container (Butane Gas Container) Accident" of the Gas Accident Yearbook issued by Korea Gas Safety Corporation (2000 Edition Chapter 4, 185p) According to the use of a large overcooking device, the cause of the accident is "an accident that the bonding vessel mounted on the combustor is ruptured due to the increase in internal pressure by using a portable butane combustor and using a wider cooker than the triplet of the combustor." In addition, the contents of the accident are described as "the overpressure cut-off device of the combustor was operated while roasting meat while using a mobile butane burner, and after a while, the butane can burst with a" flat "sound.

This means that even though the existing safety devices worked normally, an explosion of gas containers occurred. In other words, the existing safety devices are not able to fundamentally prevent the explosion of the gas container.

In addition, the gas container bursts with an explosive sound that 'opens' after the existing safety device is activated, which means that the gas flow is blocked and the latent heat of evaporation due to the vaporization heat disappears, so that all the radiant heat is added to the gas container. The internal pressure of swells rapidly, demonstrating that the vessel exploded when the strain pressure reached the breaking pressure or bursting pressure.

Therefore, the development of a new safety device that can fundamentally prevent the explosion of the gas container of the portable gas range is required.

The present invention has been invented to solve the above problems, the object of which is to prevent the explosion of the container even if the pressure of the gas container blocked the gas flow by the operation of the existing detachable safety device is continuously raised by the radiant heat It is to provide a means to prevent.

In order to achieve the above object, the present invention is primarily within the dangerous pressure range of the existing safety devices that can be extinguished by blocking the gas flow at the dangerous pressure (5 ~ 7kg / cm 2 or 4 ~ 6 kg / cm 2) In a portable gas range equipped with a detachable safety device for the gas container is separated from the inlet of the governor valve to shut off the gas supply of the container, while the existing container removable safety device is operated, the gas flow is blocked and extinguished. As the internal pressure of the gas container rises due to the radiant heat from the pot or the fire plate, and reaches the primary deformation pressure, when the gas container is deformed, the gas inside the container is released to the outside to lower the internal pressure of the container to fundamentally prevent the explosion of the gas container. It relates to an explosion-proof device for a portable gas range.

1 is a perspective view showing a conventional portable gas range

Figure 1a is a plan view showing the internal configuration of Figure 1

Figure 1b is a side cross-sectional view showing the governor valve of Figure 1a

Figure 2 is a side cross-sectional view showing a gas container mounted on the governor valve

Figure 2a is a side cross-sectional view showing a state in which the governor valve and the gas container is separated

Figure 2b is a side cross-sectional view showing a state in close contact with the governor valve by the deformation of the gas container in the gas container is removed.

Figure 3 is a side cross-sectional view showing an embodiment of the present invention

Figure 3a is an exploded perspective view of one embodiment of the present invention

Figure 4 is a side cross-sectional view showing another embodiment of the present invention

Figure 4a is an exploded perspective view of another embodiment of the present invention

<Explanation of symbols for main parts in the drawing>

1: portable gas range 2: gas container

3: release lever 4: container guide

5: handle 6: container cover

7: governor valve

70: leg 71: gas discharge groove

72: sealing chamber 73, 73a: sealing shaft

74a: locking jaw 74b: clamp

74c: protrusion 75: sealing seal

76: compression spring 77: exhaust hole

78: rubber ring 79: gas inlet

8: lower cap

81: guide hole 83: exhaust groove

84: exhaust hole 85: fixed jaw

9 spark plug 10 piezo switch

11 injection hole 12 burner head

The configuration of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily understand and reproduce.

1 is a perspective view showing a conventional portable gas range, Figure 1a is a plan view showing the internal configuration of Figure 1, Figure 1b is a side cross-sectional view showing the governor valve of Figure 1a, Figure 2 is a gas container mounted on the governor valve Figure 2a is a side cross-sectional view showing the state, Figure 2a is a side cross-sectional view showing a state in which the governor valve and the gas container is removed, Figure 2b is a state in which the gas container is in close contact with the governor valve by deformation of the gas container. As a side cross-sectional view, it comprises a container guide (4) which allows the gas container (2) to be mounted on the governor valve (7) in the front-rear direction by the vertical action of the detachable lever (3), and the detachable lever (3) is moved downward. When lowered, the container guide 4 is moved forward, and the gas container 2 is mounted on the governor valve 7, and when the detachable lever 3 is lifted up, the container guide 4 is moved backwards so that the gas container 2 is moved. The configuration and the technique of detaching from the nugget valve 7 are the same as the conventional one. In addition, when the internal pressure of the gas container 2 reaches a dangerous pressure, the detachable lever 3 is moved upward by the operation of the container detachable safety device, so that the container guide 4 is moved backward, so that the gas container 2 is a governor valve ( The configuration and technology detached from 7) are also the same as in the prior art.

Figure 3 is a side cross-sectional view showing an explosion-proof device of the portable gas range 1 according to an embodiment of the present invention, Figure 3a is an exploded perspective view of an embodiment of the present invention, the side of the gas passage connected to the gas inlet 11 A gas discharge hole 71 is formed to be connected to the sealing chamber 72, and the sealing chamber 72 is coupled to the lower cap 8 having the bottom surface open and the guide hole 81 formed at the center thereof. A seal shaft 73 corresponding to the guide hole 81 is mounted in the seal 72, and a locking jaw 74 is formed at an upper end of the seal shaft, and a seal seal 75 is mounted on an upper surface thereof to discharge the gas. Corresponding to the furnace 71, characterized in that the compression spring 76 is mounted between the lower portion of the locking jaw 74 and the lower cap (8).

In addition, the governor valve 7 generally has several legs 70 formed to be fixed to the case of the portable gas stove. The sealing chamber 72 of the present invention may be formed inside the legs 70. The simplicity was kept in check for additional manufacturing costs and eliminated the need for extra space.

In addition, several exhaust grooves 83 are formed at the side surfaces of the through-holes 81 so that the inside and the outside of the sealing chamber 72 are connected so that the gas is discharged into the exhaust grooves 83. 70) to form a hole in the race to be combined with the specific gravity of the gas heavier than the air to be discharged under the case would be the preferred embodiment.

In addition, the force of the compression spring (76) is greater than the dangerous pressure (5 ~ 7kg / cm2 or 4 ~ 6kg / cm2), the operating pressure of the conventional container removable safety device, and is designed to have a smaller force than the container deformation pressure or the burst pressure of the container This is preferable. That is, in the normal operation up to the dangerous pressure transfer of the gas container 2, the force of the compression spring 76 is greater than the dangerous pressure of the gas container so that the gas discharge passage 71 is blocked by the sealing seal 75. . In addition, the internal pressure of the gas container 2 reaches a dangerous pressure, and due to the continuous radiant heat in the state where the gas container 2 is detached by the operation of the existing safety device, the internal pressure of the container reaches the deformation pressure of the container, thereby deforming the gas. The container is in close contact with the governor valve so that the internal pressure of the gas container 2 is greater than the force of the compression spring 76 blocking the gas discharge path 71 so that the sealing seal 75 is lowered. The internal gas of 2) is discharged to the exhaust groove 83 through the sealing chamber 72 via the gas discharge passage 71.

At this time, in order to allow a large amount of gas to be discharged instantaneously, several exhaust holes 77 may be formed in the side surface of the sealing chamber 72 to facilitate gas discharge.

Butane gas containers, which are currently used in portable gas stoves, have a normal pressure of about 2 to 3 kg / cm2, and the operation of the primary container detachable safety device is regulated to operate within the range of 5 to 7 kg / cm2.

In addition, the specification of the gas container under the high-pressure gas safety law is not to be modified up to 13kg / cm2 and not to burst up to 15kg / cm2, so the operation of the present invention is preferably made to be around 13kg / cm2.

Therefore, when the internal pressure of the gas container 2 reaches the dangerous pressure (5-7 kg / cm2 or 4-6 kg / cm2), the container detachable safety device which is a primary safety device is activated, and the gas container 2 is a governor. In the state where the gas flow is blocked and extinguished from the valve (7), the latent heat of evaporation due to evaporation heat disappears, and the internal pressure of the gas container rapidly rises due to the total amount of radiant heat that continues from the pot or the plate to reach the deflection pressure of the container. 2) the bent portion of 2) is deformed so that the container is in close contact with the governor valve 7 so that the gas in the gas container 2 communicates with the gas discharge passage 71 of the governor valve 7 so that the gas pressure is compressed by the compression spring 76 ), The internal gas of the gas container (2) is discharged to the outside through the exhaust groove (83) to lower the internal pressure of the gas container (2) to prevent the container explosion.

Figure 3a is an exploded perspective view of the present invention, the sealing seal 75 and the sealing shaft 73, the compression spring 76 and the lower cap (8) separated from the leg 70 is shown in the lower cap In the guide hole 81 formed in (8), several exhaust grooves 83 are formed to allow gas to be discharged.

4 is a side cross-sectional view showing another embodiment of the present invention, in which the exhaust hole 84 is formed in the center of the lower cap 8 and the fixing jaw 85 is formed in the center of the upper surface of the compression spring 76. ) Is seated, a locking jaw (74a) is formed in close contact with the upper end of the compression spring 76, and the ring-shaped rubber in the upward direction with a clamp (74b) corresponding to the inner diameter of the compression spring 76 in the downward direction It is characterized in that the sealing shaft (73a) formed integrally with the protrusion (74c) on which the ring 78 is mounted.

In the above embodiment, it is easy to form the exhaust hole 84, the sealing shaft 73a is mounted on the compression spring 76, there is little risk of malfunction due to corrosion or wear of the operating portion and the elastic force of the compression spring 76 is applied Since most of the force is applied, the detection rate at the proper pressure is good.

Figure 4a is an exploded perspective view showing another embodiment of the present invention, the rubber ring 78 and the sealing shaft (73a) separated from the leg 70, the compression spring 76 and the lower cap (8) It was shown that the gas is configured to be discharged to the exhaust hole 84 formed in the lower cap (8).

The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the technical idea of the present invention.

As described above, the present invention primarily allows the gas container 2 to reach the container deformation pressure by radiant heat in the state where the existing container detachable safety device is operated so that the internal gas of the warm air is automatically discharged immediately before the container is deformed and exploded. Thus, by lowering the internal pressure of the gas container, the explosion of the gas container 2 is essentially prevented, thereby increasing the safety of the portable gas range 1.

In addition, due to the portability, convenience and simplicity of the portable gas cooker, the explosion risk of the gas container is expected to have a significant effect on increasing exports to Europe and the United States.

Claims (4)

In the container detachable safety device that the gas container (2) mounted on the portable gas range (1) reaches a dangerous pressure, the gas container (2) is automatically detached and the gas flow is blocked and extinguished. A gas discharge passage 71 is formed at one side of the gas passage connected to the gas inlet 11, and a sealing chamber 72 communicating with the gas discharge passage 71 is formed at one side of the governor valve 7. A sealing shaft 73 having a locking jaw 74 is formed inside the sealing chamber, and a sealing seal 75 is installed at one surface of the locking jaw 74 to correspond to the gas discharge path 71. One side of the compression spring 76 is in contact with the other surface of the locking jaw 74, and the lower cap 8 is supported in contact with the other side of the compression spring 76, characterized in that the pressure in the gas container (2) Even after the gas container 2 is released by the existing container detachable safety device and the flame is extinguished by the existing container detachable safety device, the internal pressure of the container continues to rise so that the upper bending portion of the gas container 2 exceeds the critical pressure of the container. When deformed in the axial direction, the gas container 2 is pushed against the governor valve 7 by the deformation. Explosion-proof device in which, by releasing the gas inside of the vessel at the moment outside-air portable gas cooker (1) for preventing the explosion of the gas container (2). The method of claim 1, wherein the lower cap (8) A guide hole 81 is formed at the center coupled to the bottom surface of the sealing chamber 72, and several exhaust grooves 83 are formed so that the inside and the outside of the sealing chamber 72 can communicate with the side of the guide hole 81. Explosion-proof device of a portable gas range (1), characterized in that formed. According to claim 1, wherein the exhaust cap 84 is formed in the center of the lower cap 8 and the fixing jaw 85 is formed in the center of the upper surface is the compression spring 76 is seated, the compression spring ( The engaging jaw 74a is formed to be in close contact with the upper end of the 76 and the protrusion (74b) corresponding to the inner diameter of the compression spring 76 in the downward direction and the protrusion in which the ring-shaped rubber ring 78 is mounted in the upward direction ( 74c) is an explosion-proof device for a portable gas range (1), characterized in that the sealing shaft (73a) formed integrally. The explosion-proof device for a portable gas range (1) according to claim 1, wherein the operating pressure of the compression spring (76) is greater than the dangerous pressure at which the container detachable safety device operates and is less than the container deformation pressure or the container burst pressure. .