KR102229525B1 - Fluid control valve having pressure reducing function - Google Patents

Abstract

The present invention relates to a fluid control valve having a decompressing function, which comprises: a valve body mounted in a high-pressure vessel, and having a plurality of flow paths through which a raw material gas passes; a manual valve mounted on the valve body, and manually opening and closing a first flow path connected to the high-pressure vessel; a solenoid valve connected to the manual valve with second and third flow paths to automatically open and close the flow path in accordance with an electrical signal; a check valve installed in the flow path for charging the raw material gas into the high-pressure vessel to open the flow in one direction and to block the flow in an opposite direction; a first decompressing unit connected to the solenoid valve through a fourth flow path to firstly decompress the raw material gas; and a second decompressing unit connected to the first decompressing unit through a connecting flow path, and secondly decompressing the firstly decompressed raw material gas to supply the same to a raw material using unit. According to the present invention, control of charging and discharge of a raw material gas and a decompressing function to a using pressure can be simultaneously performed.

Description

Fluid control valve with pressure reducing function {FLUID CONTROL VALVE HAVING PRESSURE REDUCING FUNCTION}

The present invention is a fluid control valve having a depressurization function having a function of controlling the flow of the raw material gas when filling the raw material gas stored in the high-pressure container into the high-pressure container or supplying it to the gas using part and reducing the raw material gas according to the pressure of the gas using part. It is about.

Currently, in the case of the hydrogen fuel cell system, a fluid control valve is installed in the high-pressure container in which the raw material gas is stored to control the flow of the raw material gas when filling the raw material gas into the high-pressure container, and when the raw material gas stored in the high-pressure container is supplied to the gas user. It controls the flow of raw material gas.

The fluid control valve can precisely control the flow of the raw material gas according to the electrical signal, and the pressure of the fluid stored in the pressure container must be kept constant, and the high-pressure container explodes in the event of a rollover or fire in the hydrogen fuel cell vehicle. You should be able to prevent it.

A valve for a conventional fluid control system is mounted on a high-pressure cylinder and connected between a first region having a first pressure and a second region having a second pressure, as disclosed in US Patent No. 7,309,113 B2 (2007 12. 18). A valve body in which the main flow passage is formed, a filter installed at the inlet side connected to the main flow passage, a manual valve installed in a part in communication with the main flow passage to open and close the main flow passage manually, and the main flow passage It includes a solenoid valve that is installed in the back pressure passage to open and closes the back pressure passage according to an electrical signal, and a shuttle valve that is installed in the main flow passage and blocks the main flow passage when overpressure occurs and opens the main flow passage when it reaches normal pressure. do.

In such a valve for a conventional fluid control system, when charging, high-pressure raw material gas flows into the main flow passage through an inlet, and when the solenoid valve is operated in an open direction, it passes through the solenoid valve and flows into the high-pressure cylinder. In addition, when the raw material gas stored in the high-pressure cylinder is supplied to the gas-using unit, the raw material gas stored in the high-pressure cylinder passes through the back pressure passage and is supplied to the gas-using unit through the inlet through the solenoid valve.

Since the pressure of the raw material gas used in the gas using part is lower than the pressure of the raw material gas stored in the high-pressure cylinder, a separate regulator is provided to reduce the pressure of the high-pressure raw material gas to low pressure and then supply it to the gas using part. Therefore, there is a problem in that the cost increases because a separate regulator is required for depressurizing the high-pressure raw material gas to a low pressure.

In addition, in conventional valves for fluid control systems, since high-pressure charging pressure is directly applied to the solenoid valve, the durability of the solenoid valve is deteriorated, there is a risk of malfunction, and the solenoid valve is damaged as the use period is prolonged. There is.

US registered patent US 7,309,113 B2 (2007 Dec 18)

Accordingly, it is an object of the present invention to provide a function of controlling the charging and discharging of high-pressure raw material gas into a high-pressure container and a function of reducing the high-pressure raw material gas to a working pressure, thereby simplifying the structure and providing a depressurization function that does not require a separate regulator. It is to provide a valve for controlling a fluid.

Another object of the present invention is to provide a fluid control valve having a pressure-reducing function capable of preventing damage to the valve by improving the structure of a solenoid valve and mitigating the impact during operation, and allowing the valve to operate smoothly.

In order to achieve the above object, the valve for fluid control of the present invention is mounted in a high-pressure container, and a valve body in which a plurality of flow paths through which raw material gas passes is formed, and a first flow path mounted on the valve body and connected to the high-pressure container are manually operated. A manual valve that opens and closes a flow path, a solenoid valve that is connected to the manual valve through the second flow path and the third flow path to automatically open and close the flow path according to an electrical signal, and is installed in the flow path for filling the raw material gas into the high-pressure container. A check valve that opens the flow in one direction and blocks the flow in the opposite direction, a first pressure reducing unit connected to the solenoid valve and a fourth channel to reduce the raw material gas first, and the first pressure reducing unit and a connection channel And a second decompression unit that is connected to and supplies the first decompressed raw material gas to the raw material using unit by secondly decompressing the raw material gas.

A temperature sensor is mounted on the part inserted into the high pressure container of the valve body to measure the temperature inside the high pressure container, and the temperature sensor is connected to one side of the solenoid valve by a cable passage and a connector mounted on the solenoid valve. Can be electrically connected.

The flow path of the valve body is connected between the inlet pipe inserted into the high-pressure container and the manual valve, so that the raw material gas for filling is supplied to the high-pressure container and the first flow path through which the raw material gas for use is discharged, and the manual valve and the check A second flow path connected between the valves, a third flow path branched from the second flow path and connected to the solenoid valve, a fourth flow path connected between the solenoid valve and the first pressure reducing unit, and the first pressure reducing unit It may include a connection passage connected between the second pressure reducing unit.

The solenoid valve includes a body portion mounted on the valve body, a valve seat mounted on a lower portion of the body portion and communicating with a second flow path, a coil mounted on an outer peripheral surface of the body portion to which power is applied, and moving to an inner surface of the body portion. The lower plunger is disposed so as to be possible and has an orifice, and a lower plunger in which a close contact portion in close contact with the valve seat is integrally formed on the lower surface thereof, and is arranged to be linearly movable on the upper side of the lower plunger and is operated by interlocking the lower plunger. When power is applied, it may linearly move and include an operation unit in which an operation rod in close contact with the orifice is formed.

The check valve includes a seat portion fixed to a flow path through which the raw material gas passes, a check ball in close contact with the seat portion to maintain airtightness, a body portion into which the check ball is linearly movable, and disposed in the body portion. And a spring that imparts an elastic force so that the check ball is in close contact with the seat part, and the seat part has a low pressure airtight part that contacts the check ball to maintain airtightness when a low pressure below the set pressure is applied, and a high pressure higher than the set pressure. When acting, the check ball may include a high-pressure airtight portion that is in contact to maintain airtightness.

The first pressure reducing unit is formed in the valve body, a valve seat portion formed to pass through a first passage communicating with the fourth passage, and a first space portion formed between the valve seat portion, and communicating with the connection passage. A valve housing having a second passage, a piston portion disposed to be linearly movable inside the valve housing and closely contacted and separated from the valve seat portion, and a cover member sealably mounted to a mounting portion formed on the valve body; A first decompression chamber formed between the piston part and the cover member to first depressurize the raw material gas, and a spring that maintains the internal pressure of the first decompression chamber by providing elastic force to the piston part installed between the piston part and the valve housing. Can include.

The second decompression unit is fixed to the inner surface of the mounting portion of the valve body to form a secondary decompression chamber, and a body portion having a fourth passage through which raw material gas flows into the secondary decompression chamber is formed, and the body portion is linearly moved to seal the inner surface of the body portion. A piston member that is arranged to be able to adjust the area of the secondary decompression chamber, a moving member that forms the secondary decompression chamber and contacts the piston member, and is installed to be linearly movable on the mounting portion, and is coupled to the opening of the mounting portion. A cover member, a spring support member disposed to be linearly movable on an inner surface of the cover member, a first spring disposed between the spring support member and the moving member to provide elastic force to the moving member, and the piston member and body portion It may include an opening and closing unit that is formed between the opening and closing of the flow path according to the linear movement of the piston member.

As described above, the fluid control valve of the present invention controls the filling and discharge of the high-pressure raw material gas into the high-pressure container, and is provided with a first pressure reduction unit and a second pressure reduction unit, thereby reducing the pressure of the raw material gas step by step.

In addition, by improving the structure of the solenoid valve, it is possible to prevent damage to the valve and smoothly operate the valve by mitigating the impact during operation.

1 is a block diagram of a valve assembly for controlling fluid according to an embodiment of the present invention.
2 is a cross-sectional view of a manual valve according to an embodiment of the present invention.
3 is an operating state diagram of a manual valve according to an embodiment of the present invention.
4 is a cross-sectional view of a pressure releasing device according to an embodiment of the present invention.
5 is an operating state diagram of the pressure relief device according to an embodiment of the present invention.
6 is a cross-sectional view of a bleed valve according to an embodiment of the present invention.
7 is an operating state diagram of a bleed valve according to an embodiment of the present invention.
8 is a cross-sectional view of a solenoid valve according to an embodiment of the present invention.
9 to 11 are operational state diagrams of a solenoid valve according to an embodiment of the present invention.
12 is a partially cut-away perspective view of a check valve according to an embodiment of the present invention.
13 and 14 are cross-sectional views of a check valve according to an embodiment of the present invention.
15 is a partially cut-away perspective view of a body portion of a check valve according to an embodiment of the present invention.
16 and 17 are cross-sectional views showing an operating state of a check valve according to an embodiment of the present invention.
18 is a cross-sectional view of a first pressure reducing unit according to an embodiment of the present invention.
19 is a cross-sectional view of a second pressure reducing unit according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this process, the size or shape of the components illustrated in the drawings may be exaggerated for clarity and convenience of description. In addition, terms specifically defined in consideration of the configuration and operation of the present invention may vary according to the intention or custom of users or operators. Definitions of these terms should be made based on the contents throughout this specification.

1 is a cross-sectional view of a valve for controlling fluid according to an embodiment of the present invention.

The fluid control valve according to an embodiment is mounted in a high-pressure container in which raw material gas is stored and a plurality of flow paths through which the raw material gas passes are formed, and the valve body 10 is mounted on the valve body 10 to manually open and close the flow path. The manual valve 12 is mounted on the valve body 10 to automatically open and close the flow path according to an electrical signal, and the flow in one direction is installed in the flow path for filling the raw material gas into a high-pressure container. A check valve 16 that opens and blocks the flow in the opposite direction, and a decompression unit 20 and 22 installed in the valve body 10 to depressurize the raw material gas according to the pressure of the raw material gas supplied to the gas using part. Includes.

In the part of the valve body 10 inserted into the high-pressure container, an inlet pipe 24 through which the raw material gas passes is mounted, and a first filter 26 for filtering the raw material gas is mounted on the inlet pipe 24, and the check The valve 16 is equipped with a second filter 28 to filter the charged raw material gas.

For the first filter 26 and the second filter 28, a 10 μm porous sintered filter is used. In the first filter 26 and the second filter 28 of the present embodiment, since a metal sintered filter is used, it is possible to prevent the filter from being damaged by the pressure of the raw material gas, and to increase the life of the filter. .

The flow path of the valve body 10 is between the first flow path 30 connected between the inlet pipe 24 and the manual valve 12, and between the manual valve 12 and the check valve 16 and the solenoid valve 32. The second flow path 32 connected, the third flow path 34 branched from the second flow path 32 and connected between the check valve 16 and the solenoid valve 14, the solenoid valve 14 and the pressure reducing unit It includes a fourth flow path 36 connected between (20, 22).

The decompression units 20 and 22 are connected to the solenoid valve 14 to first depressurize the raw material gas stored in the high-pressure container into the first decompression unit 20, the first decompression unit 20 and the connection passage 50. It includes a second decompression unit 22 that is connected and secondarily decompresses the source gas that has been first depressurized. In addition, an outlet pipe 52 for supplying the depressurized raw material gas to the gas using unit is connected to the second pressure reducing unit 22.

A temperature sensor 42 is mounted on the part inserted into the high pressure container of the valve body 10 to measure the temperature inside the high pressure container, and the temperature sensor 42 measures the temperature of the solenoid valve 14 by the cable passage 44. It is connected to one side by a cable and is electrically connected to a connector 46 mounted on the solenoid valve 14.

The valve body 10 includes a pressure relief device 50 that discharges raw material gas in the high-pressure container to the outside when the temperature of the high-pressure container rises in case of a fire due to a vehicle accident, thereby preventing the high-pressure container from exploding. , A bleed valve 52 for discharging the raw material gas in the high-pressure container to the outside is installed. The pressure releasing device 50 and the bleed valve 52 communicate with the inside of the high-pressure container through a flow path 54.

As shown in FIG. 2, the manual valve includes a body part 150 having an outer circumferential surface coupled to the valve body 10 and a valve member that is screwed to the inner surface of the body part 150 to open and close the third flow path 124. Includes 152.

The body portion 150 has a cylindrical shape and an outer circumferential surface is screwed to the valve body 10, and an inner circumferential surface is screwed to the outer circumferential surface of the valve member 152. Accordingly, when the valve member 152 is rotated, the valve member 152 moves forward and retreats to open and close the third flow path 124.

The valve member 152 is formed of a steel material in the form of a circular rod, and a contact portion 158 in close contact with the seat portion 153 formed in the third passage 124 is integrally formed at the end thereof.

Conventional valve members have a structure in which a contact member of a different material (rubber material) than the valve rod is installed at the end of the valve rod, but in this case, the problem of tearing the contact member due to high pressure occurs, and when assembling the valve, the valve rod There is a problem in that the assembling property is inferior since it is necessary to assemble the member in close contact with it.

The valve member 152 of the present embodiment is formed of a stainless material, and the contact portion 158 is integrally formed, so that it is easy to manufacture and assemble, and it is possible to prevent damage and damage to the contact portion 158 due to high pressure. A first sealing ring 154 for maintaining airtightness is installed between the body 150 and the valve body 10, and a second seal for maintaining airtightness with the body 150 on the outer circumferential surface of the valve member 152 A ring 156 is installed.

In such a manual valve 12, when the valve member 152 is rotated in one direction, as shown in FIG. 2, the valve member 152 is advanced so that the contact portion 158 of the valve member is in close contact with the seat portion 153. When the third flow path 124 is blocked and rotated in the opposite direction, as shown in FIG. 3, the valve member 152 is retracted so that the contact part 158 is separated from the seat part 153 and the third flow path ( 124).

4 is a cross-sectional view of a pressure releasing device according to an embodiment of the present invention.

The pressure releasing device 38 is mounted on the valve body 10 and installed in the flow path 54 communicating with the high pressure container, and serves to release the pressure in the high pressure container to the outside when the temperature of the high pressure container rises above the set temperature. . As an example, when the fluid control system according to the present embodiment is installed in a hydrogen battery fueled vehicle, when a fire occurs in the vehicle due to an accident or arson of the vehicle, the pressure in the high-pressure container is released to the outside to prevent the explosion of the high-pressure container. do.

The pressure releasing device 38 includes a body portion 420 mounted on the valve body 10 and communicating with the sixth flow passage 410, a piston 440 disposed to be linearly movable in the body portion 420, and It includes a glass bulb 430 which is installed inside the body 440 and is destroyed when the ambient temperature is higher than or equal to the set temperature, and the piston 440 moves linearly.

The glass bulb 430 is disposed inside the valve body 420 and a cap member 450 for fixing the glass bulb 430 is mounted at one end of the valve body.

The glass verse 430 is ruptured by temperature, the rupture temperature of the glass verse is 110±5°C, and when the pressure is increased, it is not ruptured and is a component that is ruptured by temperature.

The body portion 420 is screwed to the valve body 10, the first sealing ring 460 is mounted on the outer peripheral surface of the body portion 420, and the second sealing ring ( 470), the backup ring 466 and the third sealing ring 468 are sequentially mounted to completely maintain the airtightness between the valve body 420 and the main valve body 10.

In addition, a fourth sealing ring 462 is mounted between the piston 440 and the body portion 420, and a backup ring 464 and a fifth sealing ring 465 are mounted on the outer peripheral surface of the front side of the piston 440. The airtightness between the piston and the body part 420 is perfectly maintained.

Looking at the action of the pressure releasing device 38, when the temperature in the high-pressure container is at a normal temperature, the piston 440 blocks the sixth passage 410 while being supported by the glass bulb 430 to prevent the raw material gas of the high-pressure container. Prevent leakage. In this state, as shown in FIG. 5, when a fire occurs in the vehicle due to a vehicle accident or fire prevention or other factors, the temperature in the high-pressure container rises, and when the temperature exceeds the set temperature, the glass bulb 430 ruptures and the piston Retreat (440). Then, the sixth flow path 410 is opened to discharge fuel gas in the high-pressure container to the outside to prevent accidents such as explosion of the high-pressure container.

6 is a cross-sectional view of a bleed valve according to an embodiment of the present invention.

The bleed valve 40 is a valve that discharges raw material gas in the high-pressure container to the outside according to the user's selection, and is fixed to the valve body 10 and installed in the seventh flow path 510 connected to the high-pressure container ( 520, a valve member 530 disposed to be linearly movable within the body part 520 and in close contact with the seat part 522 formed on the body part 520 to open and close the body part 520, and the inner surface of the body part 520 A nut member 540 to be fixed, a spring 560 disposed between the nut member 540 and the valve member 530 to provide an elastic force to the valve member 530, and a screw fastened to the seventh passage 510. It includes a cap member 570.

In such a bleed valve 40, the valve member 530 is in close contact with the seat portion 522 of the valve body 520 by the pushing force of the spring 560 to block the fifth flow path 510.

And, in such a state, when the user wants to release the raw material gas in the high-pressure container, as shown in FIG. 7, the cap member 570 is first removed. In addition, when the bleed tool 580 is pushed into the inside of the valve body 520, the bleed tool 580 pushes the valve member 530 and accordingly, the valve member 530 is retracted to open the seventh flow path 510. do. Then, the raw material gas stored in the high-pressure container is discharged in the direction of the arrow through the seventh flow path 510.

The bleed tool 580 is a tool body 582 that is screwed to a portion where the cap member 570 is separated, and a tool member that pushes the valve member 530 by arranging the tool body 582 so as to move linearly. Including (584). Here, a passage 586 is formed in the tool member 584 so that the raw material gas in the high-pressure container is discharged to the outside through the passage 586.

8 is a cross-sectional view of a solenoid valve according to an embodiment of the present invention, and FIGS. 9 to 11 are operational state diagrams of the solenoid valve according to an embodiment of the present invention.

The solenoid valve 14 is a valve that automatically opens and closes the third flow path 34 when power is applied. 2The valve seat 252 in communication with the flow path 34, the coil 254 mounted on the outer circumferential surface of the body part 250 to apply power, and the coil 254 installed to be linearly movable on the inner circumferential surface of the body part 250 When power is applied to the 254, the operation unit 256 moves linearly by interaction with the coil 254, and the lower plunger 258 that is operated in conjunction with the operation unit 256 and is in close contact with the valve seat 252. ).

The body part 250 is formed in a cylindrical shape with an open upper and lower surfaces, a core 260 sealing the upper surface of the body part 250 is mounted on the upper surface, and the lower outer circumferential surface is screwed to the valve body 10. A screw coupling part 262 is formed, and an inlet 264 through which the raw material gas enters and exits is formed on the lower side thereof in communication with the second flow path 34.

The core 260 is screwed to the upper portion of the body portion 250, and a first sealing ring 266 is mounted on the outer circumferential surface thereof to prevent fluid from flowing out.

The inside of the body part 250 is formed to have a larger inner diameter than the first space part 282 in which the operation unit 256 is mounted and the first space part 282, and a second space in which the lower plunger 258 is mounted. A space portion 284 is formed.

The valve seat 252 is fixed to the lower surface of the body part 250 and has an outlet 268 through which the raw material gas is discharged, and the second sealing ring 270 is in close contact with the valve body 10 to maintain airtightness. ) Is installed. In addition, a seat portion 272 in the form of an inclined surface to which the lower plunger 258 contacts is formed on the inner surface of the upper end of the outlet 268 of the valve seat 252.

The operation unit 256 is installed to be linearly movable in the first space part 282 of the body part 250, and when power is applied to the coil 254, the upper plunger 290 and the upper plunger 290 move linearly. The moving rod 292 inserted into the inner surface of the movable linearly and operated in conjunction with the movable rod 292, and inserted to be linearly movable in the inner surface of the upper plunger 290, and opening and closing of the orifice 286 at the end of the movable rod 292 A valve member 294 on which an operating rod 296 acting as a function is formed, and a spring installed between the moving rod 292 and the core 260 to provide an elastic force so that the operating rod 296 is in close contact with the orifice 286 Including 298.

A partition 310 protruding in the circumferential direction is formed at the lower end of the upper plunger 290 inserted into the lower plunger 258 so that the fluid flows between the upper plunger 290 and the lower plunger 258. Is formed.

A locking pin 320 is mounted on the lower outer surface of the upper plunger 290, and a locking slot 322 is formed in which the locking pin 320 is inserted into the upper side of the lower plunger 258. At this time, the locking slot 322 is formed to secure a certain space in the vertical direction so that the locking pin 320 can be moved within a range set in the vertical direction of the locking slot 322.

In this way, between the upper plunger 290 and the lower plunger 258 is caught by the locking pin 320 to prevent separation from each other.

The upper plunger 290 is provided with fluid passages 330 and 332 for relieving a pressure difference for resolving a pressure difference between the fluid flowing between the outer and inner surfaces of the upper plunger 290. That is, when the fluid flows into the body part 250, the gap between the outer surface of the upper plunger 290 and the inner surface of the body part 250 and the gap between the inner surface of the upper plunger 290 and the moving rod 292 Flow in.

At this time, if the pressure of the fluid introduced to the outside of the upper plunger 290 and the pressure of the fluid introduced to the inside of the upper plunger 290 are different from each other, the linear movement of the upper plunger 290 is hindered, and thereby the upper plunger Since the initial operation of 290 is incorrect, there is a problem that the operation of the valve is not precise.

In the present invention, the upper plunger 290 is operated by forming fluid passages 330 and 332 for relieving the pressure difference between the inside and the outside in the upper plunger 290 so that the internal pressure and the external pressure of the upper plunger 290 are always the same. Improves sex.

The fluid passages 330 and 332 for relieving the pressure difference are the first fluid passages 330 formed so that the outside and the inside of the upper plunger 290 communicate with each other, and the outside and the chamber 312 of the upper plunger 290 communicate with each other. It includes a second fluid passage 332 formed in the partition 310 as possible.

Existing solenoid valves have an operating rod formed on the upper plunger, so that the operating rod directly contacts the lower plunger. In this case, when high pressure is applied to the upper plunger, the operating rod of the upper plunger strongly impacts the lower plunger, and if the operating rod of the upper plunger repeatedly contacts the lower plunger at high pressure to open or close the orifice, the operating rod is damaged, and the lower plunger is also impacted. There is a problem that the orifice hole is clogged as it is deformed by.

In order to solve this problem of the present invention, the upper plunger 290 and the valve member 294 for opening and closing the orifice 286 are separated, and the valve member 294 is arranged to be linearly movable on the inner surface of the upper plunger 290 and , By disposing a highly durable moving rod 292 on the valve member 294, the valve member 294 contacts the orifice to prevent damage to the upper plunger 290 and the lower plunger 258.

Here, the moving rod 292 is formed of a metal material having strong durability, and the valve member 294 is formed of a non-metal material so as to prevent an impact from occurring when contacting the lower plunger 258.

The lower plunger 258 is disposed to be linearly movable in the second space portion 284 of the body portion 250, and an insertion groove portion 340 into which the upper plunger 290 is inserted is formed on an upper surface thereof, and a valve is formed on the lower surface thereof. A close contact portion 342 in close contact with the sheet 252 is formed.

In addition, an orifice 286 that is opened and closed by an operating rod 296 is formed to pass through the center of the lower plunger 258.

In the insertion groove 340, a locking pin 320 fixed to the upper plunger 290 is engaged, and a locking slot 322 connecting between the upper plunger 290 and the lower plunger 258 is formed in the vertical direction. (320) is moved within the range set in the vertical direction to the locking slot (322).

The lower plunger 258 is provided with fluid flow delaying portions 350 and 352 that delay the flow of fluid flowing into the gap between the outer surface of the lower plunger 258 and the inner surface of the body 250.

The fluid flow delay units 350 and 352 include a groove 350 formed in the circumferential direction on the outer surface of the lower plunger, and a delay ring 352 inserted into the groove 350 and contacting the inner surface of the body 250.

Here, the delay ring 352 is inserted to be flowable in the groove 350 to delay the flow of fluid flowing into the outer surface of the lower plunger 258 so that a pressure difference between the upper and lower portions of the lower plunger 258 is generated. do.

In this way, as the fluid flowing to the upper portion of the lower plunger 258 is delayed by the delay ring 352, a pressure difference is generated between the upper and lower portions of the lower plunger 258, and this pressure difference As a result, the lower plunger 258 is operated by a pressure difference before operation by the electric signal of the coil, so that the lower plunger 258 can be smoothly operated.

The operation of the solenoid valve according to an embodiment of the present invention configured as described above will be described below.

First, as shown in FIG. 8, the lower plunger 258 is in close contact with the valve seat 252 and the operating rod 296 is in close contact with the orifice 286 by the elastic force of the spring 298 to form a third flow path 342. ) Is closed.

In this state, as shown in FIG. 9, when power is applied to the coil 54, the upper plunger 290 is raised, and the valve member 294 inserted in the upper plunger 290 is raised, and the orifice 286 ) Open.

Then, as the high-pressure fluid filled in the chamber 312 is discharged through the orifice 286, the fluid filled outside and inside the chamber 312 and the upper plunger 290 is in a low pressure state. At this time, when the upper plunger 290 moves linearly, the pressure difference inside and outside the upper plunger 290 becomes the same by the fluid passages 330 and 332 formed in the upper plunger 290 to resolve the pressure of the upper plunger 290. Movement takes place smoothly.

In addition, as shown in FIG. 10, the high-pressure fluid filled in the lower portion of the lower plunger 258 is delayed from being moved to the upper portion of the lower plunger 258 by the delay ring 352, and the lower plunger 258 ), a pressure difference is generated between the upper and lower portions of the valve, and the lower plunger 258 is moved before the movement according to the electrical signal of the coil 254, thereby opening the outlet 268 of the valve seat 252 do.

In this way, before the force pulled by the upper plunger 290 acts on the lower plunger 258 by the electric signal of the coil 254, the lower plunger 258 is moved by the pressure difference between the upper and the lower plunger. The movement of 258 can be made smoothly, and the valve operation can be made smoothly.

And, as shown in FIG. 11, the high-pressure fluid acting on the lower portion of the lower plunger 258 acts on the upper portion of the lower plunger 258, and the high-pressure fluid is applied to the entire lower plunger 258 and the upper plunger 290. Is in a working state, and the outlet 268 is opened to allow the fluid to pass through the second flow path 222.

12 is a partially cutaway perspective view of a check valve according to an embodiment of the present invention, and FIGS. 13 and 14 are cross-sectional views of a check valve according to an embodiment of the present invention.

The check valve 16 is a valve that is fixed to the filling flow path filled with the raw material gas and controls only one-way flow of the filling flow path, and a seat portion 652 fixed to the third flow path 34 and a seat portion 652 A check ball 654 that is in close contact with and maintains airtightness, a body portion 656 into which the check ball 654 is inserted so as to be linearly movable, and a check ball 654 disposed in the body portion 656 is disposed in the seat portion ( It includes a spring 658 for imparting an elastic force so as to be in close contact with the 652.

As shown in FIG. 15, the body portion 656 has a raw material gas passage portion 662 through which the raw material gas passes in the longitudinal direction, and a check ball 654 guides the check ball 654 in a straight line. A seating portion 664 is formed, and a spring seating portion 666 on which the spring 658 is seated is formed at the rear thereof.

The body portion 656 is formed in a shape cut at regular intervals in the circumferential direction, and the space between the cut surfaces becomes the raw material gas passage part 662 through which the raw material gas passes.

The check ball seating portion 664 is formed in front of the body portion 656 and has an inner diameter in which the check ball 654 can be sufficiently linearly moved.

The spring seating portion 666 is formed in a cylindrical shape at the rear of the body portion 656, and a bottom surface 668 with an open center is formed at a lower end thereof, so that one end of the spring 658 is supported.

The inner diameter L2 of the spring seating portion 666 is formed smaller than the inner diameter of the check ball seating portion L1 to prevent the check ball 654 from being inserted into the spring seating portion 666. That is, when the check ball 654 overcomes the elastic force of the spring 658 and retreats by the pressure of the fuel gas, the check ball 654 is caught by the front surface 670 of the spring seat 666 and the spring seat 666 It is possible to prevent the spring 658 from being compressed and deformed beyond a set value by preventing it from moving inside.

The lower end of the body portion 656 is formed to extend further from the rear of the spring seating portion 666 so that the source gas passage portion 662 can be connected to the rear of the spring seating portion 666.

In this way, the body portion 656 according to the present embodiment has an inner diameter L2 of the spring seating portion 666 smaller than the inner diameter L1 of the check ball seating portion 664 so that the check ball 654 is retracted. When the check ball 654 is caught on the front surface 670 of the spring seating portion 666, the spring 658 is excessively compressed to prevent deformation.

In addition, the body portion 656 is formed with a raw material gas passage portion 662 cut in the longitudinal direction so that the raw material gas can pass smoothly.

A fixing member 672 that is screwed to the first flow path 620 of the valve body 610 and supports the body 656 to be fixed to the first flow path 620 is mounted at the rear of the body portion 656, A pipe 674 inserted into the high-pressure container is sealedly coupled to the inner surface of the fixing member 672. At this time, a first seal ring 676 is mounted between the fixing member 672 and the pipe 674 to prevent leakage.

As shown in Figs. 16 and 17, the seat body 680 in the form of a cylinder inserted into the first flow path 620 and the seat body 680 are mounted on one surface of the seat body 680 to be less than or equal to a set pressure. It includes a low pressure airtight portion 690 to which the check ball 654 is in close contact with the low pressure action, and a high pressure airtight portion 692 to which the check ball 654 is in close contact with the set pressure or higher.

The seat body 680 has a second seal ring 686 mounted between the first passage 620 to maintain airtightness, and a first outer diameter portion 682 and a first outer diameter portion 682 formed with a small outer diameter. ) Is formed of a second outer diameter portion 684 having a large outer diameter, so that the second outer diameter portion 684 is caught in the first passage 620 and fixed to the first passage 620.

The airtight portion in contact with the check ball 654 has an advantage of excellent airtight performance at low pressure when an elastic material is used, but it is difficult to maintain airtightness at high pressure and deformation may occur during repeated use.

In addition, if an inelastic material such as metal is used for the hermetic part, it is excellent in hermetic performance at high pressure, but it is difficult to maintain hermeticity at low pressure, and deformation may occur while colliding with the check ball.

In the hermetic part of this embodiment, when a low pressure below the set pressure acts, the check ball 654 is in close contact with the low pressure hermetic part 690, and when a high pressure higher than the set pressure acts, the check ball 654 is in close contact with the high pressure hermetic part 692 To improve the airtight performance while preventing the deformation of the airtight part.

As shown in FIG. 16, the low-pressure airtight portion 690 is made of an elastic material, is formed in a circular ring shape, is fixed to the front surface of the seat body 680, and has an inclined surface ( 610) is formed. The inclined surface 610 is formed to have an inner diameter gradually smaller toward the rear, so that the check ball 654 is in close contact with the inclined surface 610.

In this way, when a low pressure is applied, the check ball 654 is in close contact with the inclined surface 610 of the low pressure airtight portion 690 to maintain airtightness, and since the low pressure acts, the check ball 654 is in the low pressure airtight portion 690 Since the contacting pressure is not high, the low-pressure airtight portion 690 can be prevented from being deformed due to excessive pressure since elasticity is restored normally even when repeatedly used.

That is, the low pressure airtight portion 690 is formed of an elastic material having a certain elastic force so that the check ball 654 is sufficiently close to maintain airtightness when a low pressure is applied, and the low pressure airtight portion 690 is elastically deformed when a high pressure is applied, At this time, the amount of elastic deformation of the low pressure hermetic part 690 is such that the low pressure hermetic part 690 can be restored to its original state and the low pressure hermetic part 690 is deformed by high pressure. Can be prevented.

A third seal ring 620 is mounted between the low pressure airtight portion 90 and the seat body 680 to maintain airtightness.

The high-pressure airtight portion 692 is formed of an inelastic material at the rear of the low-pressure airtight portion 690 so that the check ball 654 comes into contact with the high-pressure action. The high-pressure airtight portion 692 may be integrally formed with the seat body 680, and a portion to which the check ball 654 contacts may be formed in a rounded shape. In addition, the high-pressure airtight portion 692 may be fixed to the rear of the front low-pressure airtight portion of the seat body 680 of a material different from that of the seat body 680.

The high-pressure airtight portion 692 may be made of metal or non-metallic material that is inelastic.

In this way, the operation of the check valve according to an embodiment of the present invention will be described below.

When the pressure inside the high-pressure container is lower than the set pressure, the check ball 64 is in close contact with the low-pressure airtight portion 690 to maintain airtightness, as shown in FIG. 16. At this time, since the low-pressure airtight portion 690 is formed of an elastic material, the check ball 654 can be sufficiently adhered to the low-pressure action, thereby improving airtight performance.

In addition, when the pressure inside the high-pressure container is higher than the set pressure, as shown in FIG. 17, the check ball 654 is further advanced and is in close contact with the high-pressure airtight portion 692 to maintain airtightness. At this time, the check ball 54 passes through the low pressure airtight portion 690 which is an elastic material, and is in close contact with the high pressure airtight portion 692 which is an inelastic material located at the rear of the low pressure airtight portion 690 to provide airtight performance at high pressure. Improve.

The decompression units 20 and 22 are connected to the solenoid valve 14 to first depressurize the raw material gas stored in the high-pressure container into the first decompression unit 20, the first decompression unit 20 and the connection passage 50. The outlet pipe 52 for supplying the connected and depressurized raw material gas to the gas using unit is connected to include a second decompression unit 22 for secondary decompression of the first depressurized raw material gas.

As shown in FIG. 18, the first pressure reducing unit 20 is formed in the valve body 10, and a valve seat portion 704 through which the first passage 702 communicating with the fourth passage 36 passes. Wow, the valve housing 708 in which a second passage 706 in contact with the valve seat portion 704 and communicating with the connection passage 50 is formed, and the valve seat 708 is disposed so as to be linearly movable inside the valve housing 708. A piston part 710 that opens and seals the part 704, a cover member 714 that is sealably mounted to a mounting part 712 formed on the valve body 10, a piston part 710 and a cover member ( The primary decompression chamber 716, which is formed between 714) and first decompresses the raw material gas, and the piston unit 710 installed between the piston unit 710 and the valve housing 708, provides an elastic force to reduce the primary pressure. It includes a spring 718 that maintains the pressure inside the seal 716.

The valve seat portion 704 is formed to pass through the first passage 702 through which the raw material gas is supplied by communicating with the fourth passage 36, and when the sealing member 720 of the piston part 710 is in close contact with the front side, the first passage 702 A close contact portion 722 that seals the passage 702 is formed.

The valve housing 708 is in contact with the valve seat portion 704 to form a first space portion 724 through which the raw material gas passes, and a second passage communicating with the connection passage 50 A 706 is formed, and a piston part 710 is slidably inserted on the rear inner surface thereof, and a spring 718 is mounted on the outer surface thereof.

A first seal ring 726 is mounted on the outer surface of the valve housing 708 and is in close contact with the outer surface of the mounting portion 712 to seal between the valve housing 708 and the mounting portion 712.

The piston part 710 is in close contact with the inner surface of the valve housing 708 and is linearly moved, and a third passage 728 through which the raw material gas passes is formed, and the third passage 728 is a first space part ( It communicates between the 724 and the first decompression chamber 716 to guide the raw material gas flowing into the first space 724 to the first decompression chamber 716.

A decompression chamber in which a sealing member 720 in close contact with the valve seat unit 704 is mounted on the front surface of the piston unit 710, and the outer diameter is expanded on the rear surface of the piston unit 710 to form a primary decompression chamber 716 The forming part 730 is formed.

A second seal ring 732 sealed to the inner surface of the valve housing 708 is mounted on the outer surface of the piston unit 710, and a third seal ring 734 is mounted on the outer surface of the decompression chamber forming unit 730. 712) It adheres to the inner surface.

The spring 718 has one end supported on the outer surface of the valve housing 708 and the other end supported on the outer surface of the piston part 710 to provide elastic force to the piston part 710.

The operation of the first depressurization unit according to an embodiment of the present invention configured as described above will be described below.

The contact member of the piston part is separated from the valve seat part 704 by the elastic force of the spring 718. Then, the raw material gas that has passed through the fourth flow path 36 flows into the first space part 724, and the raw material gas that has flowed into the first space part 724 passes through the third path 728 as shown by arrow A. Thus, it is introduced into the first decompression chamber 716.

When the pressure of the raw material gas introduced into the primary decompression chamber 716 rises above the set pressure, the piston unit 710 is pressurized. Then, when the piston part 710 overcomes the elastic force of the spring 718 and moves linearly, the sealing member 720 is in close contact with the valve seat part 704 to seal the first passage 702.

In addition, the raw material gas, which is first depressurized by the action of the first decompression chamber 716, is supplied to the second decompression unit 22 through the second passage 706 and the connection passage 50. When the pressure inside the primary decompression chamber 716 decreases while the raw material gas is supplied to the second decompression unit 22, the piston part 710 is linearly moved by the elastic force of the spring 718 and the sealing member 720 is moved to the valve. As separated from the seat portion 704, the first passage 702 is opened to supply the raw material gas to the first decompression chamber 716.

While repeating this process, the raw material gas is first depressurized and then supplied to the second decompression unit 22 through the connection passage 50.

As shown in FIG. 19, the second decompression unit 22 is fixed to the inner surface of the mounting portion of the valve body 10 to form a secondary decompression chamber 750, and the raw material gas flows into the secondary decompression chamber 750. The body portion 752 in which the fourth passage 784 is formed, and the piston member 754 arranged to be linearly movable to be sealed on the inner surface of the body portion 752 to adjust the area of the secondary decompression chamber 750 Wow, a moving member 758 that forms a secondary decompression chamber 750 and is in contact with the piston member 754 and is installed to be linearly movable on the mounting portion 756, and a cover member coupled to the opening of the mounting portion 756 760 and a spring support member 762 disposed to be linearly movable on the inner surface of the cover member 760, and an elastic force to the moving member 758 disposed between the spring support member 762 and the moving member 758 It includes a first spring 764 providing a, and an opening and closing unit 770 formed between the piston member 754 and the body portion 752 to open and close the flow path according to the vertical movement of the piston member 754.

The spring support member 762 is provided with an adjustment member 780 for adjusting the elastic force of the first spring 764 to linearly move the spring support member 762 from the inner surface of the cover member 760 to the first spring 764. The elastic force of the first spring 764 may be adjusted, and the set pressure inside the secondary decompression chamber 750 may be adjusted according to the elastic force of the first spring 764.

The adjusting member 780 is screwed to the cover member 760 and the inner surface thereof is in contact with the spring support member 762, and a tool groove 782 is formed on the other surface exposed to the outside, and the tool groove 782 is provided with a tool. When the adjusting member 780 is rotated after inserting the adjusting member 780, the spring support member 762 is linearly moved while the adjusting member 780 is advanced or retracted to adjust the elastic force of the first spring 764.

When the adjusting member 780 is rotated in one direction, the adjusting member 780 moves forward and when the spring support member 762 is pushed, the elastic force of the first spring 764 is increased, and the second decompression chamber 750 is set inside. The pressure rises. And when the adjustment member 780 is rotated in the other direction, the spring support member 762 is retracted while the adjustment member 780 is retracted, and when the elastic force of the first spring 764 decreases, the second decompression chamber 750 is set. The pressure is lowered.

The piston member 754 is inserted into the body portion 752 so as to be slidably moved, one end of which is in contact with the moving member, and a flow path through which the raw material gas passes between the inner surface of the body portion 752 and the outer surface of the piston member ( 786 is formed, and the flow path 786 communicates with the fourth passage 784 formed in the body portion 752 so that the raw material gas flows into the secondary decompression chamber 750.

A fifth passage 790 is formed on the side of the second decompression chamber 750, and an outlet pipe 52 is connected to the fifth passage 790 to supply the second decompressed raw material gas to the gas using portion.

The opening/closing unit 770 is integrally connected to the piston member 754 and disposed to be linearly movable in the space 772 communicating with the connection passage 50, and a seventh passage 810 through which the raw material gas passes is formed. The connection part 812, the opening and closing part 820 formed in the shape of an inclined surface on the connection part 810 to open and close the flow path 786, and a second spring disposed inside the space part 772 to provide elastic force to the connection part 812 Includes (822).

The body portion 752 is mounted with a sheet member 792 in contact with the opening and closing portion, and the opening and closing portion 820 has a conical inclined surface to adjust the open area of the flow path 786.

The opening/closing part 820 has its outer surface formed in the shape of an inclined surface to adjust the open area of the flow path 786. When the opening/closing part 820 advances, the open area of the flow path 786 gradually decreases. ) Is sealed. On the contrary, when the opening/closing part 820 is retracted, the open area of the flow path 786 gradually increases, and when it is retracted to the maximum, the flow path 80 is completely opened.

In this way, the opening/closing part 820 is formed in the shape of an inclined surface to adjust the open area of the flow path 786 to maintain a constant pressure inside the secondary decompression chamber 750.

The second spring 822 serves to provide an elastic force so that the opening/closing portion 820 is in close contact with the flow path 786, and has a significantly smaller elastic force than the first spring 764.

The operation of the second pressure reducing unit according to an embodiment of the present invention configured as described above will be described below.

While passing through the first decompression unit 20, the first depressurized raw material gas is introduced into the space 772 through the connection passage 50. A certain pressure is maintained inside the secondary decompression chamber 750 by the elastic force of the first spring 764, and when the pressure inside the secondary decompression chamber 750 is lower than the set pressure, the elastic force of the first spring 764 As a result, the moving member 758 is moved forward, the piston member 754 in contact with the moving member 758 is linearly moved, and the opening/closing part 820 connected to the piston member 70 is linearly moved to open the flow path 786.

Then, the raw material gas of the space part 772 passes through the flow path 786 and is supplied into the secondary decompression chamber 750. The raw material gas supplied into the secondary decompression chamber 750 is supplied with the decompressed raw material gas through the fifth passage 790 communicating with the secondary decompression chamber 750.

And when the pressure inside the secondary decompression chamber 750 increases due to the supply of the raw material gas, the moving member 758 overcomes the elastic force of the first spring 764 and retreats. It is in close contact with the member 792 to seal the flow path 786.

While repeating this process, the raw material gas decompressed to a certain pressure is supplied to the gas using unit. At this time, the opening/closing part 820 has an inclined surface so that the open area of the flow path 786 can be adjusted, so that the pressure inside the secondary decompression chamber 750 can be precisely controlled.

In the above, the present invention has been illustrated and described by way of example and description of specific preferred embodiments, but the present invention is not limited to the above-described embodiments, and common knowledge in the technical field to which the present invention pertains within the scope not departing from the spirit of the present invention. Various changes and modifications will be possible by those who have.

10: valve body 12: manual valve
14: solenoid valve 16: check valve
20: first decompression unit 22: second decompression unit
30: first euro 32: second euro
34; 3 euro 36: 4 euro
38: pressure releasing device 40: bleed valve
50: connecting channel 52: outlet pipe

Claims (14)

A valve body mounted in the high-pressure container and having a plurality of flow paths through which the source gas passes; A manual valve mounted on the valve body and manually opening and closing a first flow path connected to the high pressure container; A solenoid valve connected to the manual valve through a second flow passage and a third flow passage to automatically open and close the flow passage according to an electrical signal; A check valve installed in a flow path for filling the raw material gas into the high-pressure container to open the flow in one direction and block the flow in the opposite direction; And a first depressurization unit connected to the solenoid valve through a fourth flow passage to first depressurize the raw material gas. And a second decompression unit connected to the first decompression unit through a connection channel and supplying the primary decompressed raw material gas to the raw material using unit by secondary decompression,
The second decompression unit is fixed to the inner surface of the mounting portion of the valve body to form a secondary decompression chamber and a body portion to form a fourth passage through which the raw material gas flows into the secondary decompression chamber; A piston member disposed on the inner surface of the body portion to be linearly movable so as to be sealed to adjust the area of the secondary decompression chamber; A moving member that forms the second decompression chamber, is in contact with the piston member, and is installed to be linearly movable on the mounting portion; A cover member coupled to the opening of the mounting portion; A spring support member disposed to be linearly movable on the inner surface of the cover member; A first spring disposed between the spring support member and the moving member to provide an elastic force to the moving member; And a second spring installed at one end of the piston member to provide an elastic force to the piston member, and an opening/closing part formed between the piston member and the body part to open and close the flow path according to the linear movement of the piston member,
The piston member is slidably inserted into the body part, one end of which is in contact with the moving member, and the other end of the piston member is formed with a connection part that is slidably inserted into the space part, and the inner surface of the body part and the piston member A flow path through which the raw material gas passes is formed between the outer surfaces, and the flow path is communicated between the fourth passage formed in the body and the secondary decompression chamber,
The opening/closing part is formed on the middle side of the piston member to open and close the flow path, and the outer surface thereof is formed in the shape of an inclined surface to adjust the open area of the flow path. The method of claim 1,
A temperature sensor is installed at the part inserted into the high pressure container of the valve body to measure the temperature inside the high pressure container, and the temperature sensor is connected to one side of the solenoid valve by a cable passage and a connector mounted on the solenoid valve. Fluid control valve with a pressure reducing function that is electrically connected. The method of claim 1,
The flow path of the valve body is connected between the inlet pipe inserted into the high-pressure container and the manual valve, the first flow path through which the raw material gas for filling is supplied to the high-pressure container and the raw material gas for use is discharged;
A second flow path connected between the manual valve and the check valve;
A third passage branched from the second passage and connected to the solenoid valve;
A fourth flow path connected between the solenoid valve and the first pressure reducing unit; And
A fluid control valve having a pressure reducing function including a connection passage connected between the first pressure reducing unit and the second pressure reducing unit. The method of claim 1,
The valve body includes a pressure releasing device that prevents the high-pressure container from exploding by releasing the raw material gas in the high-pressure container to the outside when the temperature of the high-pressure container increases in case of a fire due to a vehicle accident, and the raw material gas in the high-pressure container to the outside. A valve for controlling fluid having a pressure reducing function in which a bleed valve to be installed is installed. The method of claim 1,
The solenoid valve may include a body portion mounted on the valve body;
A valve seat mounted on a lower portion of the body portion and communicating with a second flow passage;
A coil mounted on an outer circumferential surface of the body portion to which power is applied;
A lower plunger which is movably disposed on an inner surface of the body portion, an orifice is formed, and a contact portion that is in close contact with the valve seat integrally formed on the lower surface thereof; And
It is arranged to be linearly movable on the upper side of the lower plunger and operates by interlocking the lower plunger, and is linearly moved when power is applied to the coil, and has a depressurization function including an operation unit in which an operating rod in close contact with the orifice is formed. Valves for fluid control. The method of claim 5,
The operation unit is installed to be linearly movable in the body part, and an upper plunger that moves linearly when power is applied to the coil, a movable rod inserted into the inner surface of the upper plunger so as to be linearly movable, and the movable rod operate in conjunction with the movable rod. The valve member is inserted into the inner surface of the upper plunger so that it can move linearly and has an operating rod that opens and closes the orifice at its end, and a spring installed between the movable rod and the core to provide elastic force so that the operating rod is in close contact with the orifice. Including,
Decompression function, characterized in that a fluid flow delay unit is installed on the outer surface of the lower plunger to delay the flow of fluid moving into the gap between the valve body and the lower plunger to generate a pressure difference between the upper and lower portions of the lower plunger. Fluid control valve having a. The method of claim 6,
The fluid flow delay portion is a groove formed in a circumferentially concave shape on the outer surface of the lower plunger,
A delay ring inserted into the groove and in contact with the inner wall surface of the valve body to block a gap between the valve body and the lower plunger,
The delay ring is mounted to be flowable in the groove, so that the flow of the fluid is delayed by the delay ring and slowly moves. The method of claim 1,
The check valve may include a seat portion fixed to a flow path through which the raw material gas passes;
A check ball in close contact with the seat to maintain airtightness;
A body portion into which the check ball is linearly movable; And
It is disposed in the body portion and includes a spring for imparting elastic force so that the check ball is in close contact with the seat portion,
A decompression function including a low pressure airtight part that maintains airtightness by contacting the check ball when a low pressure below the set pressure is applied, and a high pressure airtight part that maintains airtightness by contacting the check ball when a high pressure higher than the set pressure is applied. Fluid control valve having a. The method of claim 8,
The low pressure airtight portion is formed of an elastic material that elastically deforms when the check ball is in close contact, and the high pressure airtight portion is formed of an inelastic material,
A fluid control valve having a pressure-reducing function in which an inclined surface to which the check ball is in close contact is formed on an inner surface of the low-pressure airtight portion, and the inclined surface is formed to gradually narrow an inner diameter toward a rear where the high-pressure airtight portion is formed. The method of claim 1,
The first pressure reducing unit is formed in the valve body, the valve seat portion formed to pass through the first passage communicating with the fourth passage;
A valve housing having a first space portion formed between the valve seat portion and a second passage communicating with a connection passage;
A piston portion disposed to be linearly movable inside the valve housing and in close contact with and separated from the valve seat portion;
A cover member sealably mounted on a mounting portion formed on the valve body;
A first decompression chamber formed between the piston unit and the cover member to first depressurize the raw material gas; And
A fluid control valve having a pressure reducing function including a spring for maintaining pressure inside the primary pressure reducing chamber by providing an elastic force to a piston portion installed between the piston portion and the valve housing. The method of claim 10,
The valve seat portion is formed to pass through the first passage through which the raw material gas is supplied by communicating with the fourth passage connected to the solenoid valve,
The piston part is in close contact with the inner surface of the valve housing and moves linearly, and a third passage through which the raw material gas passes in the longitudinal direction is formed, and the third passage communicates between the first space part and the first decompression chamber to form a first space. A fluid control valve with a decompression function that guides the raw material gas flowing into the unit to the primary decompression chamber. delete The method of claim 1,
The spring support member is provided with an adjusting member for adjusting the elastic force of the first spring, the adjusting member is screwed to the cover member, the inner surface thereof is in contact with the spring support member, and a tool groove is formed on the other surface exposed to the outside. , When the adjusting member is rotated after inserting the tool into the tool groove, the adjusting member moves linearly to adjust the elastic force of the first spring.
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