KR20110000979A - Air-vent gas leakage auto-lock device - Google Patents

Abstract

PURPOSE: An air-vent gas leakage auto-lock device for a high-pressure-gas charging valve is provided to prevent gas explosion since a vent path is automatically blocked by the leaked high-pressure gas. CONSTITUTION: An air-vent gas leakage auto-lock device for a high-pressure-gas charging valve comprises a piston chamber(210), a rod hole(220), a piston(230), a piston rod(240), a snap ring(250), a vent hole and a leaked-gas guiding hole(270). The piston chamber is formed on the body of the high-pressure-gas charging valve. The rod hole is formed to be crossed with a vent path from the center of the piston chamber. The piston is installed in the piston chamber. The piston rod is formed on the center of the leading end of the piston and is inserted into the rod hole. A leakage groove is formed on the outer surface of a part of the piston rod and high-pressure gas is leaked into the vent hole if the leakage groove matches with the vent path.

Description

Air vent leakage auto-lock device for high pressure gas filling valve

The present invention relates to an air vent leakage automatic locking device for a high pressure gas filling valve, and more particularly, when the high pressure gas is filled into a bombe (high pressure gas container or pressure vessel) while the vent valve of the high pressure gas filling valve is opened. When the high pressure gas is leaked through the vent flow path, the air vent leakage automatic lock device for the high pressure gas filling valve is automatically operated by the leaked high pressure gas to prevent the high pressure gas in the Bombe from leaking by locking the vent flow path. It is about.

Generally, bombe (high pressure gas container or pressure vessel) refers to a container made for the purpose of filling, reaction and separation of liquid or gas in petrochemical industry, and refers to a container designed to withstand pressure. Bombe has been widely used as a gas and air tank container for fuel saving and environmental cleanness, such as LPG gas container at home, LPG gas container of automobile, compressor, fire extinguisher, air tank of large engines, etc. The utilization is getting bigger.

On the other hand, since Bombe as described above is filled with a high-pressure gas, the internal pressure is always generated. The Bombe is manufactured very robustly because it requires a structure and safety that can withstand the internal pressure of the gas filled therein. At this time, the existing Bombe form is manufactured in a generally cylindrical structure, the contents of the high pressure (liquefied gas, etc.) is charged inside the Bombe through the filling valve, while the contents are discharged through the nozzle according to the user's request.

In addition, as described above, Bombe is manufactured through steel or casting materials because it requires safety to withstand the internal pressure of the high-pressure gas charged therein. The reason why the Bombe is manufactured in a cylindrical shape is that the cylindrical structure is an appropriate structure that can withstand the internal pressure of the high-pressure gas filled therein, and is a very excellent structure in terms of safety.

On the other hand, Bombe as described above is provided with a high-pressure gas filling valve for filling the high-pressure gas on the high-pressure gas inlet of Bombe. At this time, the high-pressure gas filling valve is a high-pressure gas filling port is connected to the high-pressure hose to charge the high-pressure gas, the charging flow path control valve for adjusting the filling passage of the high-pressure gas, the safety valve to drain the high-pressure gas when the overpressure inside the Bombe and It is composed of a vent means for draining the internal pressure of Bombe when the high pressure inside Bombe is drained or the differential pressure due to the filling of high pressure gas occurs while driving the vehicle.

In the configuration of the high-pressure gas filling valve as described above, the vent means is a vent flow path in which a drain of the high pressure gas charged inside the bombe is formed, and a valve hole formed at the top of the vent flow path is inserted into the valve hole, and the upper end of the vent flow path is installed. Vent valves for sealing, vent valves coupled to the upper part of the valve hole through a screw connection to seal the vent flow path by pressurizing the vent flow shutoff port, and high pressure gas leaked into the valve hole through the vent flow path when the vent valve is opened. It consists of the structure of the vent hole in which a drain is made.

The vent means of the high pressure gas filling valve configured as described above is to drain the high pressure inside the Bombe after the airtight test inside the Bombe or to discharge the internal pressure inside the Bombe when a differential pressure is generated due to the filling of the high pressure gas while the vehicle is in operation. The vent hole is opened by rotating in the unlocking direction to drain the high pressure air in the bombe according to the gas tightness test or to drain the internal pressure of the bombe when a differential pressure is generated due to the filling of the high pressure gas while the vehicle is in operation.

However, in the case of the vent means of the high-pressure gas filling valve according to the prior art as described above, in order to drain the high-pressure air in the bombe according to the airtight test, the vent valve is rotated in the unlocking direction to open the vent hole. In the case that the vent valve is delivered without locking the valve, there is a problem that leakage of the high pressure gas charged inside the bombe occurs when the high pressure gas is charged.

Therefore, as described above, the vent means of the high-pressure gas filling valve according to the related art provides a disaster such as a gas explosion accident due to leakage of high-pressure gas generated during the filling of the high-pressure gas as the vent valve is delivered without being locked. I have a problem that can cause.

The present invention has been made to solve the problems of the prior art, the vent valve of the high-pressure gas filling valve is delivered in an open state, the leakage occurs due to the filling of the high-pressure gas inside the Bombe (high pressure gas container or pressure vessel) It is an object of the present invention to provide an air vent leakage auto-locking device for a high-pressure gas filling valve to automatically prevent the leakage of the high-pressure gas in the Bombe by automatically operating by the high-pressure gas that is leaked even if the vent flow.

In addition, the technology according to the present invention is delivered to the vent valve of the high-pressure gas filling valve is opened to automatically operate by the high-pressure gas is leaked even if the leakage caused by the filling of the high-pressure gas inside the Bombe is to be vent channel is locked The purpose is to prevent the leakage of high pressure gas in Bombe and to prevent large accidents such as gas explosion in advance.

The present invention configured to achieve the above object is as follows. That is, the air vent leakage auto-locking device for the high-pressure gas filling valve according to the present invention is a vent flow path of the drain of the high-pressure gas filled in the bombe, a valve hole formed on the top of the vent flow passage, the valve hole is inserted into the vent flow A high-pressure gas filling valve having a vent valve for sealing an upper end of the vent flow passage and a vent valve coupled to an upper portion of the valve hole to seal the vent flow passage through pressurization of the vent passage blocking opening, the body side of the high pressure gas filling valve. A piston chamber formed in a predetermined size space; A rod hole formed in a predetermined length so as to intersect the vent flow path from the center of the piston chamber; A piston installed in the piston chamber to reciprocate a predetermined section in the piston chamber; A piston rod which is formed in a predetermined length at the center of the front end of the piston and is inserted into the inside of the rod hole, but has a leakage groove formed on the outer circumferential surface of the portion to allow the high pressure gas to be leaked into the valve hole when coinciding with the vent flow path; A snap ring installed at the rear half of the piston chamber to limit the distance the piston moves to the rear half; A vent hole penetrating back and forth to one side of the piston to form a drain of leaking gas introduced into the piston chamber; It is formed to communicate with the piston chamber from the lower end of the valve hole but guides the high pressure gas leaked into the inside of the valve hole through the vent flow path into the piston chamber to operate the piston in one direction by the pressure of the gas leaked into the piston chamber to the piston rod. It consists of a configuration including a leak gas guide hole to be made to lock the vent flow.

In the configuration of the present invention as described above, the length of the piston rod is more preferably formed of a length corresponding to the length of the rod hole.

In addition, in the configuration according to the present invention, when the piston end face is in close contact with the piston end face, the leakage groove of the piston rod coincides with the vent flow passage, and it can be seen that the state of the high pressure gas through the vent flow passage can be achieved.

In the configuration of the present invention as described above, the linear movement of the piston by the leakage gas guided into the piston chamber through the leakage gas guide groove may occur only when the vent valve screwed on the valve hole is opened.

On the other hand, the configuration according to the present invention may be further configured to the piston ring which is fastened on the outer peripheral surface of the piston to prevent the leakage gas flowing into the piston chamber of the piston front end to the piston chamber of the piston end.

In addition, the configuration according to the present invention may be further configured to be O-ring fastened on the outer circumferential surface of both sides of the leakage groove to prevent leakage of leakage gas through the rod hole.

In addition, the configuration according to the present invention may be further configured to protrude in the center of the rear end surface of the piston used to push the piston to the front side further configured.

According to the technology of the present invention, the vent valve of the high-pressure gas filling valve is delivered in an open state so that even if leakage occurs due to the filling of the high-pressure gas inside the bombe, the vent valve is automatically operated by the leaking high-pressure gas to lock the vent flow path. The leakage of high pressure gas can be prevented.

Therefore, according to the present invention, the vent valve of the high-pressure gas filling valve is delivered in an open state so that even if leakage occurs due to the filling of the high-pressure gas inside the bombe, the vent valve is automatically operated to lock the vent flow path. By preventing the leakage of the high pressure gas inside the Bombe, it is possible to prevent large accidents such as gas explosions in advance.

Hereinafter will be described in detail with respect to the air vent leakage automatic locking device for a high-pressure gas filling valve according to an embodiment of the present invention.

1 is a partial cutaway perspective view showing a high-pressure gas filling valve is applied to the air vent leakage automatic locking device according to the present invention, Figure 2 is a partial cutaway sectional view showing a high-pressure gas filling valve is applied to the air vent leakage automatic locking device according to the present invention, Figure 3a is a partial cross-sectional view showing a high-pressure gas leakage state of the high-pressure gas filling valve applied air vent leakage automatic locking device according to the present invention, Figure 3b is a high-pressure gas filling valve to which the air vent leakage automatic locking device is applied according to the present invention Figure 4a is a cross-sectional view showing a high pressure gas leakage state, Figure 4a is a partial cross-sectional view showing the action of the air vent leakage automatic locking device according to the high pressure gas leakage of the high pressure gas filling valve to which the air vent leakage automatic locking device according to the present invention, 4b is according to the high pressure gas leakage of the high pressure gas filling valve to which the air vent leakage automatic locking device according to the present invention is applied. The air vent leakage is a sectional configuration diagram showing the operations of the automatic lock.

First, before describing the air vent leakage automatic locking device 200 for the high pressure gas filling valve according to the present invention, the high pressure gas filling valve 100 will be described as shown in FIGS. 1 to 4. 100 is a high-pressure hose (not shown) is connected to the high-pressure gas filling port 110, the filling of the high-pressure gas, the filling passage control valve 120 for adjusting the filling passage of the high pressure gas, Bombe (high pressure gas container Or pressure vessel) When the overpressure occurs inside the safety valve 130 where the high pressure gas is drained and the high pressure inside the Bombe is drained after the airtight test inside the Bombe, or when the differential pressure due to the filling of the high pressure gas occurs while driving the vehicle, the internal pressure inside the Bombe is measured. It consists of the structure of the vent means for draining.

In the configuration of the high-pressure gas filling valve 100 configured as described above, the vent means has a vent flow passage 141 in which a drain of the high pressure gas filled in the bombe is formed, and a valve hole 142 formed at an upper end of the vent flow passage 141. ), The vent passage block 143 is inserted into the valve hole 142 to seal the upper end of the vent passage 141 and coupled to the upper portion of the valve hole 142 by a screw coupling to the vent passage block ( It consists of a configuration of the vent valve 144 to seal the vent flow path 141 through the pressure of 143.

On the other hand, the air vent leakage automatic locking device 200 according to the present invention, as described above, by installing the high-pressure gas filling valve 100 in Bombe did not lock the vent valve 144 in the process of the airtight test inside the Bombe Even when delivered in a state, when the high pressure gas is charged inside the Bombe, the vent flow passage 141 is automatically locked to block leakage of the high pressure gas being charged.

Looking at the air vent leakage automatic locking device 200 according to the present invention to automatically prevent the leakage of the high pressure gas is charged by automatically locking the vent flow passage 141 as described above is constant on one side of the body of the high pressure gas filling valve 100 The piston chamber 210 is formed in a sized space, the rod hole 220 formed in a predetermined length so as to intersect the vent flow path 141 from the center of the piston chamber 210, the piston chamber 210 is installed in the piston chamber 210 Piston 230 for reciprocating a predetermined section therein, is formed with a predetermined length in the center of the front end portion of the piston 230 is inserted into the interior of the rod hole 220, but the recessed groove 242 is formed on a portion of the outer peripheral surface Distance between the piston rod 240 and the piston chamber 210 which is installed at the rear of the piston chamber 210 to allow the high pressure gas to leak into the valve hole 142 when the vent channel 141 is matched. To limit the snap ring 250, piston 230 It is formed so as to communicate with the piston chamber 210 from the lower end of the vent hole 260 and the valve hole 142 through which the drainage of the gas leaked into the piston chamber 210 is penetrated back and forth to one side of the vent passage 141. The piston rod is operated by guiding the high pressure gas leaked into the inside of the valve hole 142 to the piston chamber 210 by operating the piston 230 in one direction by the pressure of the gas leaked into the piston chamber 210. A vent gas guide hole 270 is formed to lock the vent flow path 141 by the 240.

The air vent leakage automatic locking device 200 according to the present invention configured as described above is the leakage of the gas when the vent valve 144 is opened, the blocking of the vent flow passage 141 by the vent flow passage block 143 is released First, the high-pressure gas filled in the bombe is pushed up the vent flow block 143 through the high pressure via the leakage groove 242 of the piston rod 240 from the bottom of the vent flow passage 141 through the vent flow passage 141. Open the top of the).

Next, as described above, when the vent flow passage block 143 is pushed up by the high pressure gas to open the upper end of the vent channel 141, the gas flow enters the inside of the valve hole 142 to guide the gas leakage. The linear movement of the piston 230 is performed in the rearward direction by the pressure of the gas leaked into the piston chamber 210 through the hole 270 and introduced into the piston chamber 210 at the front side of the piston 230.

As described above, when the linear movement of the piston 230 is made in the rearward direction by the pressure of the gas leaked into the piston chamber 210 at the front side of the piston 230, the piston rod integrally coupled with the piston 230 ( 240 is also a linear movement in the direction of movement of the piston 230 so that the matching of the leakage groove 242 and the vent flow path 141 formed in the piston rod 240 is the vent flow path 141 is a piston rod 240 Is locked. As a result, the vent flow passage 141 is locked by the piston rod 240 to prevent leakage of the high pressure gas charged inside the bombe.

As described above, the piston 230 which is moved while the linear movement of the piston 230 is made in the rearward direction by the pressure of the gas leaked into the piston chamber 210 of the first half of the stone 230 is performed by the snap ring 250. Only the first half is moved. That is, the piston 230 does not move to the rear endlessly by the gas leaks, but the movement distance is limited by the snap ring 250.

In addition, as described above, a linear movement of the piston 230 is performed in the rearward direction by the pressure of the gas leaked into the piston chamber 210 of the first half of the piston 230, and the groove 242 formed in the piston rod 240. ) And the vent flow passage 141 is mismatched, the vent flow passage 141 is locked by the piston rod 240, the nugas flow introduced into the piston chamber 210 vents formed in the piston 230 It is discharged to the outside air through the hole 260. Of course, the discharge of the leakage gas through the vent hole 260 is made from the time when the leakage gas is introduced into the interior of the piston chamber 210 and the pressure is formed.

On the other hand, as described above, the vent hole 260 for discharging the leaked gas introduced into the interior of the piston chamber 210 to the outside is made of a smaller diameter than the leaked gas guide hole 270 and the piston in front of the piston 230 While the pressure is sufficiently formed by the leakage gas inside the seal 210, the leakage gas may be discharged through the vent hole 260.

As described above, the piston 230 flows into the piston chamber 210 through the leakage gas guide hole 270 to the rearward direction by the pressure of the leakage gas introduced into the piston chamber 210 at the front end side of the piston 230. After the linear movement of the vent channel 141 is locked by the piston rod 240, and after the leakage gas inside the piston chamber 210 is discharged to the outside air through the vent hole 260, the piston 230. When the rear side of the pressure forward to move the leakage groove 242 and the vent flow path 141 of the piston rod 240 is in the same state again. At this time, when the rear side of the piston 230 is pressed forward, the piston 230 is pressed to the front side through the knob 300 protruding in the center of the rear side of the piston 230.

Each component constituting the air vent leakage automatic locking device 200 according to the present invention will be described in detail as follows. First, the piston chamber 210 is to allow the piston 230 to be described later to be installed to make a straight reciprocating movement, such a piston chamber 210 is a high-pressure gas filling valve as shown in Figures 1 to 4 ( 100) is formed to a certain depth on one side of the body. At this time, the inner diameter of the piston chamber 210 is formed corresponding to the outer diameter of the piston 230.

Next, the rod hole 220 constituting the air vent leakage automatic locking device 200 according to the present invention is that the piston rod 240 for inserting and locking the vent flow passage 141 is inserted, such a rod As shown in FIGS. 1 to 4, the holes 220 are formed to have a predetermined length to intersect the vent flow passage 141 from the center of the piston chamber 210.

Meanwhile, as described above, the rod hole 220 formed to have a predetermined length to intersect the vent flow passage 141 from the center of the piston chamber 210 may be formed to be orthogonal to the vent flow passage 141 or to cross the non-orthogonal state. It can be formed.

The piston 230 constituting the air vent leakage automatic locking device 200 according to the present invention is a straight line by the leakage gas and the manual operation introduced into the interior of the piston chamber 210 through the leakage gas guide hole 270 to be described later To reciprocate to linearly reciprocate the piston rod 240 to be described later, such a piston 230 is installed in the piston chamber 210 as shown in Figures 1 to 4.

As described above, the piston 230 installed inside the piston chamber 210 and linearly reciprocating a predetermined section is moved into the piston chamber 210 through the gas leakage hole guide 270 described later as described above. The straight reciprocating motion is performed through manual pressurization through the incoming gas and the knob 300.

On the other hand, on the outer circumferential surface of the piston 230 as described above, a piston ring for preventing the leakage gas flowing into the piston chamber 210 at the tip of the piston 230 to leak into the piston chamber 210 at the rear end of the piston 230 ( 280 is further configured. The piston ring 280 is fastened through a ring groove (not shown) formed on the outer circumferential surface of the piston 230 as shown in FIGS. 1 to 4.

The piston rod 240 constituting the air vent leakage automatic locking device 200 according to the present invention is a linear reciprocating motion in the same direction according to the linear reciprocating motion of the piston 230 to lock and unlock the vent flow path 141 For this purpose, such a piston rod 240 is formed in a predetermined length at the center of the front end portion of the piston 230 as shown in Figures 1 to 4 is inserted into the inside of the rod hole 220, but the groove on the outer peripheral surface of the portion A 242 is formed so that the high pressure gas is leaked into the valve hole 142 when the vent flow passage 141 coincides with the vent flow passage 141.

The piston rod 240 configured as described above is a piston rod 240 to perform a straight reciprocating motion in the same direction according to the linear reciprocation of the piston 230 to lock and unlock the vent flow path 141 is When the piston 230 is pushed forward by the knob 300 to be described later, and the leakage groove 242 coincides with the vent flow passage 141, the state of the high pressure gas charged inside the bombe may be made. When the piston 230 is pressurized backward by the leakage gas introduced into the piston chamber 210 through the gas guide hole 270, the leakage groove 242 does not coincide with the vent channel 141. Leakage of the charged high-pressure gas is blocked.

Meanwhile, when the piston rod 240 as described above is inserted to the inside of the rod hole 220 to the maximum as shown in FIGS. 3A and 3B, the leakage groove 242 and the vent flow passage 141 coincide with each other. The state in which the high pressure gas filled therein can be leaked, and as shown in FIGS. 4A and 4B, the piston rod 240 is retracted from the inside of the rod hole 220 by a predetermined distance so that the leak groove 242 and If the vent flow path 141 is not matched, the vent flow path 141 is locked by the piston rod 240, and the leakage of the high pressure gas charged inside the bombe is blocked.

In addition, an O-ring 290 for preventing leakage of leakage gas through the rod hole 220 is further provided at both sides of the leakage groove 242 of the piston rod 240 configured as described above. That is, the O-ring 290 is fastened on the outer circumferential surface of a predetermined distance on both sides of the leakage groove 242 of the piston rod 240 as shown in FIGS. 1 to 4 to prevent leakage of leakage gas through the rod hole 220. It is provided in this ring groove (not shown).

The snap ring 250 constituting the air vent leakage automatic locking device 200 according to the present invention is for limiting the movement distance when the piston 230 moves backward by the leakage gas flowing into the piston chamber 210. As such, the snap ring 250 is installed in the second half of the piston chamber 210 as shown in FIGS. 1 and 4 to limit the distance that the piston 230 moves to the second half.

In other words, the snap ring 250 for limiting the moving distance when the piston 230 is moved backward by the leaking gas as described above is installed on the rear side of the piston 230, which is the latter half of the piston chamber 210, When the piston 230 is moved backward by the gas to limit the moving distance through the snap ring 250. Therefore, the piston 230 is moved only to the front surface of the snap ring 250 when moving to the rear side by the gas leakage.

The vent hole 260 constituting the air vent leakage automatic locking device 200 according to the present invention is for discharging the leakage gas introduced into the piston chamber 210 to the outside through the leakage gas guide hole 270. The vent hole 260 penetrates back and forth on one side of the piston 230 as shown in FIGS. 3A and 4B to form a drain of the gas leaked into the piston chamber 210.

The vent hole 260 configured as described above is formed to have a smaller diameter than the gas leakage guide hole 270 as described above, and the gas leakage flows into the piston chamber 210 through the gas leakage hole guide 270. While the pressure of the gas is sufficiently formed, the outside air of the gas can be discharged.

The leakage gas guide hole 270 constituting the air vent leakage automatic locking device 200 according to the present invention is to allow the leakage gas leaked into the interior of the valve hole 142 into the piston chamber 210. The leakage gas guide hole 270 is formed to communicate with the piston chamber 210 from the lower end of the valve hole 142 as shown in FIGS. 1 to 4, but the valve hole 142 is provided through the vent flow path 141. Guide the high pressure gas leaked into the inside of the piston chamber 210 to operate the piston 230 in one direction by the pressure of the gas leaked into the piston chamber 210 to vent the piston rod 240 The flow path 141 is locked.

The leakage gas guide hole 270 configured as described above allows the high pressure gas leaked into the valve hole 142 through the vent flow passage 141 to be introduced into the piston chamber 210 so that the inside of the piston chamber 210 and the piston are inclined. The high pressure is applied between the 230 and the linear movement of the piston 230 in one direction. Accordingly, the piston rod 240 also linearly moves in the same direction as the piston 230, and as a result, the vent flow passage 141 and the leakage groove 242 do not coincide with each other as shown in FIGS. 4A and 4B. 141 is locked by the piston rod 240 is made of blocking of leakage.

Of course, the automatic vent of the vent flow passage 141 is made by the operation of the air vent leakage automatic locking device 200 according to the present invention as described above in order to block the leakage is made as shown in Figures 3 and 4 The opening of the vent valve 144 screwed onto the hole 142 should be transferred. In other words, the linear movement of the piston 230 due to the leakage gas guided into the piston chamber 210 through the leakage gas guide hole 270 is performed by the vent valve 144 screwed onto the valve hole 142. It is only generated when opened.

In the configuration of the air vent leakage automatic locking device 200 according to the present invention configured as described above, the length of the piston rod 240 is formed with a length corresponding to the length of the rod hole 220, the piston chamber 210 line When the piston 230 is in close contact with the end surface of the piston 230, the leakage groove 242 of the piston rod 240 is in a state in which the high pressure gas through the vent flow passage 141 can be leaked.

Knob 300 constituting the air vent leakage automatic locking device 200 according to the present invention is to push the piston 230 to the original position in the original position through a manual operation, such a knob 300 is 1 to 4 As shown in the drawing, a protrusion is formed at the center of the rear end surface of the piston 230.

As described above, the knob 300 moves the piston 230 in the state moved backward by the gas to the fore, and presses the piston 230 forward so that the groove 242 of the piston rod 240 coincides with the vent channel 141. This allows the leakage of the high pressure gas charged inside the Bombe.

As described above, the air vent leakage automatic locking device 200 according to the present invention is delivered to the vent valve 144 of the high pressure gas filling valve 100 is opened, even if leakage occurs due to the filling of the high pressure gas inside the Bombe. By automatically operating by the high pressure gas is leaked to the vent flow path 141 is locked to prevent the high pressure gas in the Bombe leakage. Therefore, a large accident such as a gas explosion due to leakage of high pressure gas can be prevented in advance.

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.

1 is a partially cutaway perspective view showing a high-pressure gas filling valve is applied to the air vent leakage automatic locking device according to the present invention.

Figure 2 is a partial cross-sectional view showing a high-pressure gas filling valve is applied to the air vent leakage automatic locking device according to the present invention.

Figure 3a is a partial cross-sectional view showing a high-pressure gas leakage state of the high-pressure gas filling valve is applied air vent leakage automatic locking device according to the present invention.

Figure 3b is a cross-sectional view showing a high-pressure gas leakage state of the high-pressure gas filling valve is applied air vent leakage automatic locking device according to the present invention.

Figure 4a is a partial cross-sectional view showing the action of the air vent leakage automatic locking device according to the high pressure gas leakage of the high-pressure gas filling valve applied air vent leakage automatic locking device according to the present invention.

Figure 4b is a cross-sectional view showing the action of the air vent leakage automatic locking device according to the high pressure gas leakage of the high-pressure gas filling valve applied air vent leakage automatic locking device according to the present invention.

[Description of Symbols for Main Parts of Drawing]

100. High pressure gas filling valve 110. High pressure gas filling port

120. Filling flow control valve 130. Safety valve

141.Bent euro 142.Valve hole

143. Vent flow shutoff 144. Vent valve

200. Automatic air vent lock

210. Piston seal 220. Rod hole

230. Piston 240. Piston Rod

242. Recess groove 250. Snap ring

260. Vent Hole 270.Nuclear Gas Guide Hole

280. Piston ring 290. O-ring

300. Knob

Claims (7)

A vent flow passage formed with a drain of a high pressure gas filled in a bombe, a valve hole formed at an upper end of the vent flow passage, a vent flow path blocking hole for inserting the valve hole to seal an upper end of the vent flow passage, and a screw at an upper portion of the valve hole. In the high-pressure gas filling valve is provided with a vent valve coupled through the coupling to seal the vent flow path through the pressurization of the vent flow block block, A piston chamber having a predetermined size space in the body of the high pressure gas filling valve; A rod hole formed to have a predetermined length so as to intersect the vent passage from the center of the piston chamber; A piston installed in the piston chamber to reciprocate a predetermined section; A piston rod which is formed at a predetermined length at the center of the front end of the piston and is inserted into the rod hole but has a leaking groove formed on an outer circumferential surface of a portion thereof so that high pressure gas is leaked into the valve hole when coinciding with the vent flow path; A snap ring installed at the rear half of the piston chamber to limit the distance the piston moves to the rear half; A vent hole penetrating back and forth to one side of the piston to form a drain of leaking gas introduced into the piston chamber; And The piston is formed so as to communicate with the piston chamber from the lower end of the valve hole, and guides the high pressure gas leaked into the valve hole through the vent flow path to the piston chamber to guide the piston by the pressure of the gas leaked into the piston chamber. The air vent leakage automatic locking device for a high-pressure gas filling valve, characterized in that the configuration comprising a gas guide hole for operating in one direction to block the vent flow path by the piston rod. According to claim 1, wherein the length of the piston rod air vent leakage automatic locking device for a high-pressure gas filling valve, characterized in that formed in a length corresponding to the length of the rod hole. The method of claim 2, wherein when the piston tip surface is in close contact with the piston chamber front surface, the leakage groove of the piston rod coincides with the vent flow path so that high pressure gas can be leaked through the vent flow path. Air vent leakage lock for high pressure gas filling valve. [4] The vent valve according to any one of claims 1 to 3, wherein the linear movement of the piston by the leakage gas guided into the piston chamber through the leakage gas guide groove is screwed onto the valve hole. Air vent leakage automatic locking device for a high-pressure gas filling valve, characterized in that only occurs when the opening. 5. The high pressure gas filling valve as claimed in claim 4, further comprising a piston ring which is fastened on an outer circumferential surface of the piston to prevent leakage of gas leaked into the piston chamber at the front end of the piston into the piston chamber at the rear end of the piston. Air vent leak lock. The air vent leakage automatic locking device for a high-pressure gas filling valve according to claim 5, further comprising an O-ring which is fastened on an outer circumferential surface of both sides of the leakage groove to prevent leakage of leakage gas through the rod hole. 7. The automatic shut-off apparatus for high pressure gas filling valve according to claim 6, further comprising a knob which protrudes at the center of the rear end surface of the piston and is used when the piston is pushed forward.

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