KR100586005B1 - Valve for gas tank - Google Patents

Abstract

The present invention relates to a valve for a gas container for opening and closing the liquefied petroleum gas filled in the gas container, in particular, a part of the LPG discharged to the pressure regulator because the pressure regulator is abnormally connected to the valve body or the pressure regulator is external In the case of leaking to the valve, the LPG discharged by the pressure regulator automatically shut off to prevent the gas accident safety valves related to the gas container valve.

In the gas container valve according to the present invention, a gas inlet hole into which a compressed gas filled in a gas container is introduced is formed at a lower portion of the gas container, and a pressure regulator is inserted into and coupled to one side of the valve. A valve body having a gas discharge hole for discharging gas to the pressure regulator; And a handle coupled to an upper portion of the valve body, the handle configured to open and close an upper portion of a connection hole connecting the gas inlet hole and the gas discharge hole, wherein the upper part is opened and a piston is embedded therein. A cylinder in which the piston moves up and down by the pressure of the compressed gas when the compressed gas is introduced into an open upper portion; a switch connected to the piston and a link and opening and closing a lower portion of the connection hole according to the up and down movement of the piston ; Through-holes formed on the wall between the gas inlet hole and the gas outlet hole from side to side; A first communication hole formed below the through hole to communicate with the inside of the gas container; A second communication hole formed in communication with the gas discharge hole in an upper portion of the through hole; A check valve built in the second communication hole and pressurized by a pin mounted at the tip of the pressure regulator when the pressure regulator is connected to the gas discharge hole to open the second communication hole; A third communication hole spaced apart from the second communication hole and formed in communication with the gas discharge hole in an upper portion of the through hole; A fourth communication hole spaced apart from the first communication hole in a lower portion of the through hole and formed in communication with an open upper portion of the cylinder; And a rod member inserted into the through hole to communicate the first communication hole and the second communication hole with each other and the third communication hole and the fourth communication hole with each other.

Gas inlet hole, Gas outlet hole, Valve body, Connecting hole, Handle, Switchgear, Cylinder, Through hole, First, second, third and fourth communication hole, Check valve, Rod member

Description

Valve for gas tank

1 is a cross-sectional view showing a conventional LPG container valve.

Figure 2 is a cross-sectional view showing a valve for a gas container according to an embodiment of the present invention.

3 is a side cross-sectional view of the portion A of FIG. 2 viewed from the left side.

Figure 4 is a schematic diagram showing the operation of the cylinder and the switch for discharging the nitrogen gas to the outside before discharging the liquefied petroleum gas filled in the gas cylinder.

Figure 5 is a schematic diagram showing the operation of the cylinder and the switch for discharging the liquefied petroleum gas filled in the gas cylinder.

6 is a perspective view showing the cylinder and the actuator shown in FIGS.

<Description of Main Reference Codes in Drawings>

1: Valve for gas container 100: Valve body

101: first coupling portion 102: connection portion

103: second coupling portion 104: gas inlet hole

105: gas discharge hole 106: connection hole

107: through hole 108: first communication hole

109: second communication hole 110: third communication hole

111: fourth communication hole 112: fifth communication hole

113: protrusion 200: check valve

300: handle 400: opening and closing means

410: switchgear 420: cylinder

421: piston 500: rod member

501: first incision 502: second incision

The present invention relates to a valve for a gas container for opening and closing the liquefied petroleum gas filled in the gas container, in particular, a part of the LPG discharged to the pressure regulator because the pressure regulator is abnormally connected to the valve body or the pressure regulator is external In the case of leaking to the valve, the LPG discharged by the pressure regulator automatically shut off to prevent the gas accident safety valves related to the gas container valve.

In general, liquefied petroleum gas (LPG: Liquefied Petroleum Gas) is obtained in the process of refining crude oil. Propane and butane are the main components, and propylene and butylene are added thereto to pressurize and liquefy. LPG is a flammable gas that is lighter than water and heavier than air and is colorless, odorless and tasteless. And, because LPG is heavier than air, if a gas leak occurs, it does not diffuse into the air and remains in the lower part of the place where the leak occurs, which may cause an explosion accident due to static electricity or a flame.

LPG-filled container valves with the risk of explosion accidents include a safety valve function that ejects gas to the outside until the gas pressure drops to the specified pressure when the LPG volume increases suddenly by heating the LPG container due to fire. It is prescribed to have.

In the conventional LPG container valve having the characteristics as described above, as shown in Figure 1, the first coupling portion 11 for screwing the LPG container is formed on the lower side, such as a gas stove or boiler A connection part 12 is formed to connect a pressure regulator for supplying a gas of a constant pressure to the gas using mechanism, and a second safety valve is installed on the other side when the gas pressure of the LPG container is higher than the prescribed pressure. A valve body 10 in which a coupling part 13 is formed; And a handle 20 rotatably installed on the upper portion of the valve body 10 to open and close the flow of gas.

At this time, a gas inlet hole 11a through which the LPG filled in the LPG container flows into the valve body 10 is formed inside the first coupling part 11, and a gas inlet hole 11a is formed inside the connection part 12. A gas discharge hole 12a through which the gas introduced into the gas is discharged to the pressure regulator is formed, and a connection hole connecting two holes 11a and 12a between the gas inlet hole 11a and the gas discharge hole 12a. 14) is formed.

Meanwhile, the handle 20 opens and closes an upper portion of the connection hole 14 connecting the gas inflow hole 11a and the gas discharge hole 12a to adjust the flow of gas.

 According to the conventional LPG container valve made in this way, when the user rotates the upper handle 20 in the counterclockwise direction to use gas, the handle 20 is raised, the connection hole 14 is opened to the container LPG in the gas is discharged to the pressure regulator through the gas inlet hole (11a), the connecting hole (14), and the gas discharge hole (12a) and then delivered to each gas combustion apparatus.

However, the conventional gas container valve as described above has the advantage of maintaining a constant gas pressure in the gas container by discharging the gas to the outside when the gas pressure in the gas container is greater than the specified pressure by providing a safety valve on the other side of the valve body However, if the pressure regulator is abnormally connected to the valve body or if the pressure regulator leaks out due to an abnormality in the pressure regulator, there is no means to detect and block the gas. There was a risk of an accident.

Accordingly, the present invention has been made in order to solve the problems caused by the use of the container valve as described above, a part of the LPG discharged to the pressure regulator because the pressure regulator is abnormally connected to the valve body or the pressure regulator is abnormal The purpose of the present invention is to provide a valve for a gas container that can prevent a safety accident due to a gas leak by blocking the LPG discharged to the pressure regulator when the gas leaks to the outside.

In the gas container valve according to the present invention, a gas inlet hole into which a compressed gas filled in a gas container is introduced is formed at a lower portion of the gas container, and a pressure regulator is inserted into and coupled to one side of the valve. A valve body having a gas discharge hole for discharging gas to the pressure regulator; And a handle coupled to an upper portion of the valve body, the handle configured to open and close an upper portion of a connection hole connecting the gas inlet hole and the gas discharge hole, wherein the upper part is opened and a piston is embedded therein. A cylinder in which the piston moves up and down by the pressure of the compressed gas when the compressed gas is introduced into the open upper portion; A switch connected to the piston and a link to open and close a lower portion of the connection hole according to a vertical movement of the piston; Through-holes formed on the wall between the gas inlet hole and the gas outlet hole from side to side; A first communication hole formed below the through hole to communicate with the inside of the gas container; A second communication hole formed in communication with the gas discharge hole in an upper portion of the through hole; A check valve built in the second communication hole and pressurized by a pin mounted at the tip of the pressure regulator when the pressure regulator is connected to the gas discharge hole to open the second communication hole; A third communication hole spaced apart from the second communication hole and formed in communication with the gas discharge hole in an upper portion of the through hole; A fourth communication hole spaced apart from the first communication hole in a lower portion of the through hole and formed in communication with an open upper portion of the cylinder; And a rod member inserted into the through hole to communicate the first communication hole and the second communication hole with each other and the third communication hole and the fourth communication hole with each other.

Preferably, the rod member, the first cut portion for communicating the first and second communication holes are formed in a predetermined portion, the communication hole for communicating the third, fourth communication holes with each other formed in a position spaced apart from the first cut portion It is characterized by.

And, the lower diameter in the cylinder is formed smaller than the upper diameter, the piston is located in the upper piston located in the upper portion in the cylinder and the lower piston in the lower piston is characterized in that consisting of the integrally coupled by the central axis of the upper piston .

In addition, the gas container valve according to the invention is characterized in that it further comprises a fifth communication hole spaced apart from the fourth communication hole in the lower portion of the through-hole and in communication with the interior of the gas container.

On the other hand, the rod member, characterized in that the second cut-off portion for communicating the 4,5 communication hole with each other in the initial state removed from the through-hole is formed in a predetermined portion spaced apart from the first cut-out portion.

Hereinafter, the characteristics and the operation of the above-described configuration through the preferred embodiment of the valve for a gas container according to the present invention will be described in more detail.

Figure 2 of the accompanying drawings is a cross-sectional view showing a valve for a gas container according to an embodiment of the present invention, Figure 3 is a side cross-sectional view viewed from the left side A of Figure 2, Figure 4 is a liquefied petroleum gas filled in the gas cylinder Schematic diagram schematically showing the operating relationship between the cylinder and the switchgear for discharging the nitrogen gas to the outside before discharge, Figure 5 is a schematic diagram showing the operating relationship between the cylinder and the switchgear for discharging the liquefied petroleum gas filled in the gas cylinder 6 is a perspective view showing the cylinder and the actuator shown in FIGS. 2 to 4.

As shown, the gas container valve 1 according to an embodiment of the present invention, the valve body 100 is coupled to the gas container (2); A handle 300 rotatably installed on the upper portion of the valve body 100 to manually open and close the flow of gas; An opening and closing means 400 installed in the valve body 100 to automatically open and close the flow of gas; And a rod member 500 circulating some of the gas filled in the gas container 2 to operate the opening and closing means.

The valve body 100 forms a first coupling part 101 which is screwed to the gas container 2 at a lower portion thereof, and a pressure regulator for supplying a constant pressure gas to a gas using mechanism such as a gas stove or a boiler. (2) the connection portion 102 is connected to one side, and when the gas pressure of the gas container (2) is higher than the prescribed pressure, the second coupling is coupled to the safety valve to eject the LPG in the gas container (2) to the outside The part 103 is formed on the other side.

Here, a gas inlet hole 104 through which gas filled in the gas container 2 flows into the valve body 100 is formed inside the first coupling part 101, and a valve body ( A gas discharge hole 105 through which gas introduced into the gas is discharged to the pressure regulator 3 is formed, and a gas inflow hole 104 and a gas discharge hole are disposed between the gas inflow hole 104 and the gas discharge hole 105. The connection hole 106 connecting the 105 is formed.

In addition, a part of the wall of the valve body 100 positioned between the gas inlet hole 104 and the gas outlet hole 105 has a through hole 107 into which the rod member 500 is horizontally inserted. As shown in FIG. 5, a first communication hole 108 communicating with the gas inlet hole 104 is formed in the lower portion of the through hole 107, and a gas discharge hole 105 is formed in the upper portion of the through hole 107. The second and third communication holes 109 and 110 communicated with each other are formed to be spaced apart from each other, and the fourth communication hole 111 spaced apart from the first communication hole 108 and communicated with the opening and closing means at a lower portion of the through hole 107. And a fifth communication hole 112 spaced apart from the fourth communication hole 111 and in communication with the gas inlet hole 104 is further formed.

At this time, when the pressure regulator 3 is connected to the gas discharge hole 105 of the connecting portion 102, the pressure regulator 3 is pressurized by the pin 3a mounted at the tip of the pressure regulator 3. And a check valve 200 for opening the second communication hole 109.

The check valve 200 is coalesced in the second communication hole 109 by the spring 201, and if a force is not applied from the outside, the lower part of the disc shape having a diameter smaller than the inner diameter of the second communication hole 109 is When the upper portion is pressed by the pin 3a of the pressure regulator 3 while maintaining the state in close contact with the bottom surface of the protrusion 113 protruding from the inner edge of the second communication hole 109, the lower portion of the disc shape is a protrusion. The gas is communicated through the gap between the lower portion of the disc shape and the inner side surface of the second communication hole 109 as it descends from the 113. At this time, while the pressure regulator 3 is connected to the connecting portion 102, the pin 3a mounted at the tip of the pressure regulator 3 is inserted into the second communication hole 109 to pressurize the upper portion of the check valve 200. Done.

The handle 300 is for manually adjusting the flow of gas by opening and closing the upper part of the connection hole 106 formed in the valve body 100, so that the gas is not leaked to the outside through the handle 300 outside the lower part. A pair of O-rings 301 are mounted.

Opening and closing means 400 is installed in the first coupling portion 101 for automatically opening and closing the flow of gas, the switch 410 for opening and closing the lower portion of the connection hole 106; And an open upper portion communicating with the fourth communication hole 111 and having a piston 421 connected to the switch 410 and a link 425 therein, and when gas is introduced through the opened upper portion, It includes a cylinder 420 for lowering the switch 410 while the piston 421 is lowered.

At this time, the front end of the switch 410 is formed in a conical shape to effectively open and close the lower portion of the connection hole 106. The inner diameter of the upper portion of the cylinder 420 is larger than the inner diameter of the lower portion, and the piston 421 is integrally coupled to the upper piston portion 422 and the upper piston portion 422 positioned on the upper portion of the cylinder 420. And a lower piston portion 423 positioned below the cylinder 420. On the outside of the upper and lower piston parts 422 and 423, o-rings 424 and 424 'are respectively mounted to maintain the airtightness of the upper and lower parts.

In this way, the inner diameter of the upper portion of the cylinder 420 is formed larger than the inner diameter of the lower portion, and the diameter of the upper piston portion 422 is formed larger than the diameter of the lower piston portion 423, the upper portion of the cylinder 420 When gas is introduced through the piston 421 is effectively lowered. At this time, the diameter of the upper piston portion 422 is formed 1 to 1.5 times larger than the diameter of the lower piston portion 423, the ratio of the diameter is most preferably 1.1 times.

The rod member 500 is for activating the opening and closing means 400 by circulating the gas filled in the gas container 2, the predetermined portion of the rod member 500 when the rod member 500 is completely inserted into the through hole 107 The first cutout 501 is formed to communicate the first and second communication holes 108 and 109 with each other, and the rod member 500 is disposed in the through hole 107 at a position spaced apart from the first cutout 501. Before fully inserted, a second cutout 502 is formed to communicate the fourth and fifth communication holes 111 and 112 with each other, and a rod member is disposed between the first cutout 501 and the second cutout 502. When the 500 is fully inserted into the through hole 107, a communication hole 503 is formed to communicate the third and fourth communication holes 110 and 111 with each other. The outside of the rod member 500 includes a plurality of first and second cutouts 501, 502 and communication holes 503 to prevent water leakage along the surface of the rod member 500 when gas is communicated. O-ring 504 is mounted.

Therefore, in the initial state in which the rod member 500 is not completely inserted into the through hole 107 as shown in FIG. 4, a part of the gas in the gas container 2 is the fifth communication hole 112 and the second cutout. 502 and the fourth communication hole 111 flows into the open upper portion of the cylinder 420, and thus the piston 421 of the cylinder 420 descends and the switch 410 is lowered to lower the connection hole 106. Will open the lower part.

In addition, when the rod member 500 is completely inserted into the through hole 107 in a state in which the upper portion of the connection hole 106 is blocked by the handle 300, the fifth communication hole ( Since the 112 and the fourth communication hole 111 are blocked from each other, gas does not flow into the open upper portion of the cylinder 420, so that the switch 410 and the piston 421 are raised by the gas pressure of the gas container 2. The switch 410 is in a state of shielding the lower portion of the connection hole 106.

Then, when the pressure regulator 3 is connected to the valve body 100, the pin 3a mounted at the tip of the pressure regulator 3 presses the check valve 200 to open the second communication hole 109. As shown in FIG. 5, the gas of the gas container 2 passes through the first communication hole 108, the first cutout 501, and the second communication hole 109. Gas transferred to the gas discharge hole 105, the cylinder through the third communication hole 110, the communication hole 503 and the fourth communication hole 111 in the state in which the pressure regulator (3) is closed The lower portion of the connection hole 106 is opened by flowing into the open upper portion of the 420 and lowering the piston 421 and the actuator 410. Therefore, when the user rotates the handle 300 to open the upper portion of the connection hole 106 and the pressure regulator 3 to open, the user can use the gas filled in the gas container 2.

In this process, if a gap is generated between the pressure regulator 3 and the valve body 100 due to a wrong connection in the process of connecting the pressure regulator 3, or the pressure regulator 3 itself is broken, a gap is formed. The gas transferred to the gas discharge hole 105 through the first communication hole 108, the first cutout 501, and the second communication hole 109 is discharged to the outside through the gap as it is, so that the gas is discharged to the cylinder 420. Since the piston 421 and the switch 410 are not transmitted, the elevated initial state is maintained as it is.

Referring to the operation of the valve for a gas container according to an embodiment of the present invention configured as described above are as follows.

First, the gas container 2 equipped with the valve 1 according to the present invention is filled with a predetermined amount of nitrogen (N ₂ ) gas in advance before filling LPG to check whether the gas container 2 leaks. Testing will be essential.

After the gas tightness test, LPG is charged into the gas container 2 while the GISO gas is filled, so that the relatively light nitrogen gas is located at the top of the gas container 2 and the relatively light LPG is It is located at the bottom of the gas container (2).

As such, when the LPG is filled, the LPG and the nitrogen gas coexist in the gas container 2, so the LPG supplier must discharge the nitrogen gas to the outside before the gas container 2 is delivered to the user.

Thus, looking at the process of discharging nitrogen gas from the gas container (2), as shown in Figure 4, if the supplier maintains the rod member 500 in the initial state that is not completely inserted into the through hole 107, the gas container As the nitrogen gas filled in the upper portion of the (2) flows into the upper portion of the cylinder 420 through the fifth communication hole 112, the second cutout 502, and the fourth communication hole 111, the piston 421 The lowering of the switch 410 is lowered. As such, when the switch 410 descends, the lower portion of the connection hole 106 is opened, and thus, when the supplier turns the handle 300 to open the upper portion of the connection hole 106, the nitrogen gas charged in the gas container 2 is It is discharged to the outside through the gas inlet hole 104, the connection hole 106, and the gas discharge hole 105.

As such, when the nitrogen gas filled in the gas container 2 is completely discharged, the supplier rotates the handle 300 as opposed to when the nitrogen gas is discharged to prevent the LPG from being discharged and press the rod member 500 to press the through hole ( After fully inserted into 107, the gas container 2 is supplied to the user. Under this condition, since the fifth communication hole 112 and the fourth communication hole 111 are blocked from each other, as shown by a dotted line in FIG. 5, gas does not flow into the open upper portion of the cylinder 420 so that the gas container 2 By the gas pressure of the ()) the switch 410 and the piston 421 is raised, thereby the switch 410 continues to shield the lower portion of the connection hole (106).

When the gas container 2 is supplied to the user and the user connects the pressure regulator 3 connected to the end of the gas hose to the connection portion 102 of the valve body 100, the pressure regulator 3 is shown in FIG. 5. The pin 3a mounted at the tip of the squeezes the check valve 200 installed in the second communication hole 109 to open the second communication hole 109, so that some of the LPG filled in the gas container 2 is opened. Is moved to the gas discharge hole 105 through the first communication hole 108, the first cutout 501 and the second communication hole (109).

At this time, since the pressure regulator 3 is closed inside by its own valve, if it is normally connected to the valve body 100 and there is no leaking part in the pressure regulator 3 itself, the pressure regulator 3 is moved to the gas discharge hole 105. LPG is introduced into the open upper portion of the cylinder 420 through the third communication hole 110, the communication hole 503 and the fourth communication hole 111 to press the upper portion of the piston 421, the piston 421 The lower part of the connection hole 106 connecting the gas inlet hole 104 and the gas discharge hole 105 is opened because the lowering the switch 410 is lowered. Therefore, the user can use LPG simply by rotating the handle 300 to open the upper portion of the connection hole 106 and to open the valve of the pressure regulator 3.

However, when the pressure regulator 3 is abnormally connected when the pressure regulator 3 is connected to the valve body 100, a gap is generated between the pressure regulator 3 and the valve body 100, or the pressure regulator 3 itself is broken and a gap is formed. In the piston 421 in the cylinder 420 because the LPG transferred to the gas discharge hole 105 is leaked to the outside through the gap created in the process of connecting the pressure regulator 3, without being transferred to the cylinder 420. Is to maintain the elevated initial state, and thus the switch 410 also maintains the elevated state to continue to shield the lower portion of the connection hole ().

Therefore, even if the user rotates the handle 300 and opens the pressure regulator 3 for LPG use, LPG is not discharged. On the other hand, since the amount of LPG transferred to the gas discharge hole 105 through the first and second communication holes 108 and 109 is minute, even if leaked to the outside through the gap of the pressure regulator 3, there is a risk of a gas accident. none.

As described above, even if the LPG is not discharged even if the handle 300 is rotated and the pressure regulator 3 is opened, the user may disconnect the pressure regulator 3 and replace it if it is normally connected or broken.

As described above with reference to the accompanying drawings for the gas container valve according to a preferred embodiment of the present invention, the present invention is not limited to the embodiments and drawings described in detail in the specification, various within the technical scope of the invention Modifications can be made.

According to the gas container valve of the present invention as described in detail above, when the pressure regulator is abnormally connected or damaged to the valve body, LPG discharge in the gas container is automatically blocked by the opening and closing means, so that a safety accident due to gas leakage is prevented. You can prevent it in advance.

Claims (5)

A gas inlet hole through which the compressed gas filled in the gas container is introduced is formed at a lower portion coupled to the gas container, and a pressure regulator is inserted and coupled to one side to discharge the compressed gas introduced through the gas inlet hole to the pressure regulator. A valve body having a gas discharge hole formed therein; And a handle coupled to an upper portion of the valve body and configured to open and close an upper portion of a connection hole connecting the gas inlet hole and the gas discharge hole. An upper part of which is open and a piston is formed therein so that the piston moves up and down by the pressure of the compressed gas when the compressed gas is introduced into the open upper part; A switch connected to the piston and a link to open and close a lower portion of the connection hole according to a vertical movement of the piston; Through-holes formed left and right in a wall between the gas inlet hole and the gas outlet hole; A first communication hole formed below the through hole to communicate with the inside of the gas container; A second communication hole formed in communication with the gas discharge hole in an upper portion of the through hole; A check valve embedded in the second communication hole and pressurized by a pin mounted at a tip of the pressure regulator when the pressure regulator is connected to the gas discharge hole to open the second communication hole; A third communication hole spaced apart from the second communication hole and formed in communication with the gas discharge hole in an upper portion of the through hole; A fourth communication hole spaced apart from the first communication hole in a lower portion of the through hole and in communication with an open upper portion of the cylinder; And And a rod member inserted into the through hole to communicate the first communication hole and the second communication hole with each other and the third communication hole and the fourth communication hole with each other. . The method of claim 1, The rod member may include a first cutout portion formed at a predetermined portion to communicate the first and second communication holes with each other, and a communication hole communicated with the third and fourth communication holes may be spaced apart from the first cutout portion. Valve for gas container, characterized in that formed. The method of claim 1, The lower diameter in the cylinder is formed smaller than the upper diameter, the piston is composed of an upper piston located in the upper portion in the cylinder and a lower piston located in the lower portion in the cylinder and integrally coupled by the central axis of the upper piston. Valve for gas containers. The method of claim 2, And a fifth communication hole spaced apart from the fourth communication hole and formed in communication with the inside of the gas container, below the through hole. The method of claim 4, wherein The rod member is a valve for a gas container, characterized in that the second incision in the initial state removed from the through-hole removed from the through hole formed in a predetermined portion spaced apart from the first incision.

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