KR200394748Y1 - Gas control apparatus having mechanical automatic cut-off unit - Google Patents

Abstract

The present invention relates to a gas control device. The gas control device includes a shutoff valve installed to selectively close the gas flow path for supplying gas from the gas supply source to the gas stove; A pressure sensor which senses a gas flow in the gas flow path and controls the shutoff valve; And an automatic shut-off unit mounted upstream of the pressure sensor to allow normal flow of gas but automatically close the gas flow path when a back flow of gas occurs. In this way, by providing a mechanical automatic shut-off unit together with the pressure sensor, it is possible to control the gas more safely and conveniently with a simple configuration and low cost.

Description

GAS CONTROL APPARATUS HAVING MECHANICAL AUTOMATIC CUT-OFF UNIT}

The present invention relates to a gas control device, and more particularly to a gas control device having a mechanical automatic shut-off unit together with a pressure sensor to control the gas more safely and conveniently at a simple configuration and low cost.

Gas appliances (eg, gas ranges, gas ovens, gas boilers, etc.) used in homes or restaurants are made from gas such as LPG, LNG, etc. It is connected to an outdoor gas tank or a gas tank of a city gas construction by a pipe to receive gas.

Since these gas appliances pay attention to safety by using a special fuel called gas, an intermediate valve is installed in the middle of a pipe connecting each gas appliance and the gas tank in addition to an ignition device installed in each gas appliance to control ignition and extinguishing. I use it.

Therefore, the user who wants to use the gas appliance opens the intermediate valve to supply gas to the gas appliance, and then ignites the corresponding gas appliance using the ignition device. After the use of the gas appliance is completed, the ignition device installed in the gas appliance is first closed and extinguished, and the intermediate valve is closed to shut off the gas supply.

For example, a user who wants to cook by using a gas range opens an intermediate valve mounted on a gas pipe and then ignites the gas using an ignition device. After cooking, close and extinguish the ignition device of the gas range and close the gas supply by closing the intermediate valve.

The use of the double safety device of the ignition device and the intermediate valve in the use of the gas appliance is because there are inherent risks such as gas explosion when using the gas appliance.

However, if the user wants to minimize the risk of gas leakage in the manner described above, the user has to open and close the intermediate valve every time the gas appliance is used. This results in the majority of users who always leave the intermediate valve open and use only the ignition device to ignite or extinguish the gas appliance. In this case, there is a risk of gas explosion if gas leaks due to poor ignition conditions.

In addition, there is a risk of gas explosion due to gas leakage when using an aged gas appliance or an intermediate valve.

Accordingly, an object of the present invention is to provide a gas control device having a mechanical automatic shut-off unit together with a pressure sensor to control the gas more safely and conveniently with a simple configuration and low cost.

In order to achieve the above object of the present invention, the present invention provides a shut-off valve installed to selectively close the gas flow path for supplying gas from the gas source to the gas stove; A pressure sensor which senses a gas flow in the gas flow path and controls the shutoff valve; And an automatic shut-off unit mounted upstream of the pressure sensor to allow normal flow of the gas but automatically close the gas flow path when a reverse flow of the gas occurs.

In the gas control device, the automatic shutoff unit comprises: a moving member having a head made of a soft elastic material, a thin column extending rearward from the head, and a stopper having an enlarged diameter at the end of the column; A bracket mounted to an inner wall of the gas flow path and having a ring-shaped base for receiving the head and a holder part for movably holding the pillar of the movable member while allowing the flow of gas; And an elastic member wound around the column of the movable member between the stopper of the movable member and the holder portion of the bracket to press the head of the movable member toward the base of the bracket. It overcomes the force of the elastic member and moves in the gas flow direction to allow gas flow, and when the gas flows back, it is characterized in that it is engaged with the base of the bracket by the force of the elastic member to block the gas flow.

At this time, the automatic shut-off unit further includes a narrowed portion protruding inward from the inner wall of the gas flow path at the lower end of the bracket, the moving member is further moved in the gas flow direction when the gas flows at a pressure higher than a predetermined value By interlocking with the narrowed portion is characterized in that to block the gas flow. It is also preferable that the head of the movable member is made of a soft elastic material.

In the gas control device, the pressure sensor is characterized in that for closing the gas flow path with the shut-off valve when the automatic shut-off unit blocks the gas flow path.

Further, in the gas control device, the shutoff valve, the shutoff unit and the pressure sensor are arranged in the order of upstream to downstream.

The gas control device further includes a second pressure sensor that controls the shutoff valve, disposed upstream of the shutoff valve, wherein the second pressure sensor, the shutoff valve, the shutoff unit, and the pressure sensor are upstream. Characterized in that arranged in the order of downstream.

Various features and advantages of the present invention will be described in detail as follows in connection with the accompanying drawings.

1 is a schematic block diagram of a gas control device according to a preferred embodiment of the present invention.

First, as shown in FIG. 1, a gas pipe configuration of a general household is connected from a gas supply source 10 to a boiler 20 through a gas flow path, that is, a gas supply pipe 12 and 14, and also to a gas supply pipe 12, 16, and the like. 18) to the gas stove 30.

In FIG. 1, the gas control device 100 according to the present invention is installed on the gas stove 30 side of the gas supply pipes 12, 16, and 18 connected from the gas supply source 10 to the gas stove 30.

Gas control device 100 is composed of a pressure sensor 110, a mechanical automatic shut-off unit 120 and a shutoff valve 170 disposed downstream from the upstream, the pressure sensor 110 is blocked by a signal line (L) Is connected to the valve 170. In addition, the arrangement order of these is an illustration only and is not limited to what was illustrated. For example, the shutoff valve 170 disposed at the most upstream may be disposed at the downstream side, that is, at the gas stove 30 side. However, the pressure sensor 110 and the mechanical automatic shutoff unit 120 are preferably arranged in this order adjacent to each other.

2 is a cross-sectional view of the gas control device 100 according to a preferred embodiment of the present invention.

As shown in FIG. 2, the pressure sensor 110 and the mechanical automatic shutoff unit 120 are mounted on the gas supply pipe 18 on the side of the gas stove 30 (FIG. 1), and the shutoff valve 170 is a gas supply source ( It is attached to the gas supply line 16 of the 10 side.

According to this configuration, the pressure sensor 110 detects the presence and size of the gas flow and controls the shutoff valve 170 through the signal line (L) to open and close the gas supply pipe (16). On the other hand, the mechanical automatic shut-off unit 120 is configured to automatically close the gas supply pipe 18 when the reverse flow and overflow of the gas not detected by the pressure sensor 110 occurs. Since the gas flow is blocked when the gas supply pipe 18 is closed, the pressure sensor 110 detects this and controls the shutoff valve 170 to close the gas supply pipe 16 as well.

Hereinafter, the configuration of the mechanical automatic shutoff unit 120 will be described with reference to FIGS. 3 to 5. In these figures, FIG. 3 is a perspective view of the mechanical automatic shutoff unit of FIG. 2, FIG. 4 is a plan view of FIG. 3, and FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 3.

The mechanical automatic shutoff unit 120 includes a moving member 130 that can open and close the gas supply pipe 14 (FIG. 2) while moving in accordance with the gas flow, and a gas supply pipe 14 while receiving the moving member 130 to be movable. It includes a bracket 150 fixed to the inner wall of the spring 158 to implement an elastic coupling between the moving member 130 and the bracket 150.

The moving member 130 includes a head 132 made of a soft elastic material, a thin column 138 extending rearward from the head 132, and a stopper 140 having an enlarged diameter at the distal end of the column 138. do. Meanwhile, the head 132 has a hemispherical front surface 134 and a conical rear surface 136.

Bracket 150 includes a ring-shaped base 152 for receiving the rear surface 136 of the head 132 and a holder portion 156 extending rearwardly from the base 152. The base 152 has a slope 154 corresponding to the rear surface 136 of the head 132, and the holder portion 156 is divided into four so that gas can flow therebetween. On the other hand, a hole (not shown) is drilled in the portion where the four branches of the holder portion 156 collect so that the pillar 138 of the moving member 130 passes. Accordingly, the holder portion 156 is able to move (hold) the pillar 138 of the movable member 130.

On the other hand, the spring 158 is wound around the pillar 138 of the movable member 110 between the stopper 140 of the movable member 130 and the holder portion 156 of the bracket 150. Accordingly, as shown in FIG. 5, when no external force is applied, the moving member 130 is forced to the left side of the drawing so that the rear surface 136 of the head 132 is engaged with the slope 154 of the bracket 150. The gas supply line 18 (FIG. 2) is closed.

On the other hand, the spring 158 can be made of any kind of elastic material. In addition, a suitable elastic member configuration other than the illustrated form may be employed instead of the spring 158.

6 is a cross-sectional view illustrating the operation of the mechanical automatic shutoff unit 120.

The operation of the mechanical automatic shut-off unit 120 and the operation of the gas control device 100 will be described with reference to FIGS. 1 to 5 above.

First, in the mechanical automatic shut-off unit 120 described above, when the gas is normally supplied from the gas supply source 10 to the gas stove 30, the moving member 130 is positioned as 130B. That is, the gas is applied to the moving member 130 by a predetermined pressure to move in the direction of the arrow (B) to form a gas flow (F) through the holder portion 156 of the bracket 150.

If this gas flow F disappears, the moving member 130 is positioned at 130A by the elastic force of the spring 158. For example, since the gas does not flow when the shutoff valve 170 closes the gas supply pipe 16, the gas pressure in the direction of the arrow B with respect to the moving member 130 is lost, so that the moving member 130 is positioned at 130A. .

Also, even when the gas flows back in the direction of the arrow A, the moving member 130 is positioned at 130A to close the gas supply pipe 18.

This backflow of gas may occur in the configuration of FIG. 1 when the user turns off the gas stove 30, for example, where the boiler 20 is operating. That is, even when the gas stove 30 is turned off, the gas remains in the gas supply pipes 16 and 18, and since the boiler 20 consumes gas, the gas in the gas supply pipes 16 and 18 moves to the gas supply pipe 14. do. In this case, the pressure sensor 110 recognizes that the gas stove 30 continues to operate and opens the shutoff valve 170 without closing it. In order to prevent such a situation, a flow sensor may be employed instead of the pressure sensor 110, but this is an expensive device.

Therefore, the present invention proposes to install a mechanical automatic shut-off unit 120 upstream of the pressure sensor 110 and to automatically block the back flow of gas as shown in FIG. That is, when the mechanical automatic shut-off unit 120 firstly blocks the back flow of gas to eliminate the flow of gas, the pressure sensor 110 recognizes that the gas stove 30 is turned off and accordingly the shutoff valve 170 is turned off. The gas supply pipe 16 is closed by controlling.

By combining the mechanical automatic shut-off unit 120 of this simple configuration with the pressure sensor 110, it is possible to effectively block the back flow of gas without employing an expensive flow sensor.

In addition, when there is excessive gas flow (overflow) above a predetermined value in the direction of arrow B, the moving member 130 may further move in the direction of arrow B. FIG. That is, located at 130C. In this position, the front surface 134 of the head 132 of the moving member 130 is engaged with the narrow portion 160 of the gas supply pipe 18 to block the gas flow. At this time, since the head 132 is made of a soft material, the edge 162 of the narrow portion 160 partially enters the head 132 and the front surface 134 and the narrow portion 160 of the head 132. Will increase the mating surface.

Even in this case, since the gas flow is temporarily blocked, the pressure sensor 110 detects this and controls the shutoff valve 170 to close the gas supply pipe 16 to block the gas flow.

7 is a cross-sectional view of a gas control device according to another embodiment of the present invention.

As shown in FIG. 7, the first pressure sensor 110a and the mechanical automatic shutoff unit 120 are mounted on the gas supply pipe 18 on the side of the gas stove 30 (FIG. 1), and the shutoff valve 170 is a gas. It is attached to the gas supply line 16 of the supply source 10 side. In addition, the second pressure sensor 110b is disposed upstream of the shutoff valve 170. As such, when the second pressure sensor 110b is disposed together with the first pressure sensor 110a, the change in the gas pressure upstream of the shutoff valve 170 may be sensed and the shutoff valve 170 may be properly controlled accordingly. Therefore, the stability of the gas equipment can be improved.

As described above, the gas control device of the present invention can effectively block backflow of gas by using a pressure sensor, a mechanical automatic shutoff unit, and a shutoff valve of a simple configuration. In addition, even when an overflow occurs, it can be effectively blocked to ensure stability. In addition, it is possible to reduce the cost of the entire gas control device by using a combination of an inexpensive pressure sensor and a mechanical automatic shut-off unit without using an expensive flow sensor. In addition, by arranging the pressure sensors upstream and downstream of the shutoff valve, the stability of the gas equipment can be improved.

In the above described with reference to a preferred embodiment of the present invention, those of ordinary skill in the art that the present invention in the scope of the invention without departing from the spirit and scope of the present invention described in the utility model registration claims It will be understood that modifications and changes can be made.

1 is a schematic block diagram of a gas control device according to a preferred embodiment of the present invention.

2 is a cross-sectional view of a gas control device according to a preferred embodiment of the present invention.

3 is a perspective view of the mechanical automatic shutoff unit of FIG. 2.

4 is a plan view of FIG. 3.

FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 3.

6 is a cross-sectional view illustrating the operation of the mechanical automatic shutoff unit.

7 is a cross-sectional view of a gas control device according to another embodiment of the present invention.

<Explanation of symbols of main parts in drawings>

110: pressure sensor 120: automatic shut-off unit

130: moving member 132: head

138: pillar 140: stopper

150: bracket 152: donation

156: holder portion 158: spring

160: narrow part 170: shut-off valve

Claims (7)

A shut-off valve installed to selectively close the gas flow path for supplying gas from the gas supply source to the gas stove; A pressure sensor which senses a gas flow in the gas flow path and controls the shutoff valve; And And an automatic shut-off unit mounted upstream of the pressure sensor to allow normal flow of gas but automatically close the gas flow path when a back flow of gas occurs. The method of claim 1, wherein the automatic shut-off unit A moving member having a head made of a soft elastic material, a thin column extending rearward from the head, and a stopper having an enlarged diameter at the end of the column; A bracket mounted to an inner wall of the gas flow path and having a ring-shaped base for receiving the head and a holder part for movably holding the pillar of the movable member while allowing the flow of gas; And An elastic member wound between the stopper of the movable member and the holder portion of the bracket to press the head of the movable member toward the base of the bracket, The moving member overcomes the force of the elastic member when the gas flows normally and moves in the gas flow direction to allow gas flow. When the gas flows back, the moving member engages with the base of the bracket by the force of the elastic member to block the gas flow. Gas control device. The method of claim 2, wherein the automatic shut-off unit The lower end of the bracket further comprises a narrowed portion protruding inward from the inner wall of the gas flow path, And the moving member further moves in a gas flow direction when the gas flows at a pressure equal to or greater than a predetermined value to engage the narrowed portion to block the gas flow. The gas control device according to claim 2, wherein the head of the moving member is made of a soft elastic material. The gas control device according to any one of claims 1 to 4, wherein the pressure sensor closes the gas flow path with the shutoff valve when the automatic shutoff unit blocks the gas flow path. The gas control device according to any one of claims 1 to 4, wherein the shutoff valve, the shutoff unit, and the pressure sensor are arranged in the order of upstream to downstream. The valve according to claim 1, further comprising a second pressure sensor disposed upstream of the shutoff valve, the second pressure sensor controlling the shutoff valve. And the second pressure sensor, the shutoff valve, the shutoff unit, and the pressure sensor are arranged in the order of upstream to downstream.