KR20120063042A - Regulator - Google Patents

Abstract

PURPOSE: A regulator is provided to simplify an inner structure of the regulator by arranging a second decompression unit and a diaphragm in a row. CONSTITUTION: A regulator comprises a body(10), a first decompression unit(20), and a second decompression unit. The body comprises an appearance, a frame, and a decompression chamber. The first decompression unit is coupled outside a supply port supplying gas fuel inside the body, and supplies high pressure gas fuel to the supply port by firstly decompressing the gas fuel. The second decompression unit is installed inside the body. The second decompression unit secondly decompresses the firstly decompressed gas fuel into delivered pressure.

Description

Regulator {REGULATOR}

The present invention relates to a regulator, and more particularly, to a regulator for depressurizing a fuel compressed at high pressure such as compressed hydrogen gas or natural gas to a predetermined pressure in two stages.

A regulator is a device that is applied to a vehicle using compressed hydrogen gas or compressed natural gas as a fuel, and supplies a pressure to the outlet side by reducing the high pressure fuel pressure formed at the inlet side to a predetermined pressure.

The present applicant is a Korean Patent Application No. 10-2009-0099639 (2009-10) for a fuel pressure regulator that performs a two-stage fuel pressure reduction applied to a compressed natural gas (hereinafter referred to as 'C & G') vehicle Filed on May 20, hereinafter referred to as "Patent Document 1".

1 is a perspective view of a regulator according to Patent Literature 1, and FIGS. 2 and 3 are cross-sectional views of the first pressure reducing unit and the second pressure reducing unit shown in FIG. 1.

As shown in FIG. 1, the regulator according to Patent Document 1 includes a first decompression unit 100 for primarily depressurizing fuel and a second decompression unit for secondary depressurization of gaseous fuel passing through the first decompression unit 100. It comprises a 200, the operation direction of the first pressure reducing unit 100 and the second pressure reducing unit 200 is configured to be perpendicular to each other.

The first pressure reducing unit 100 is connected to an input port 101 for supplying high-pressure fuel and a hot water port 102 for absorbing heat from the engine and supplying heated hot water, and to the second pressure reducing unit 200. Output port 201 for discharging the used fuel is connected.

As shown in FIGS. 1 and 2, the first decompression unit 100 includes a first housing 110 and a first orifice 111 in which a first orifice 111 and a first decompression chamber 112 are formed. The first valve shaft 120 and the first valve shaft 120 to adjust the opening amount of the first valve shaft 120 is coupled to one end of the contraction and expansion in accordance with the pressure of the gas fuel flowing in and out of the first pressure reducing chamber 112 Coupled between the first diaphragm 130, the first cover 140, the first diaphragm 130 and the first cover 140 to be coupled to the first housing 110 so as to cover the end of the first diaphragm 130 is installed And a first plate 160 mounted between the first spring 150 and the first orifice 111 and the first diaphragm 130.

As shown in FIG. 3, the second decompression unit 200 is coupled to the first housing 110 in a vertical direction, and the second housing 210 in which the second orifice 211 and the second decompression chamber 212 are formed. ) Is coupled to one end of the second valve shaft 220 and the second valve shaft 220 coupled to the second orifice 211 and contracted according to the pressure of the gaseous fuel introduced into and discharged from the second pressure reducing chamber 212. And a second cover 240, a second diaphragm 230, and a second cover 240 coupled to the second housing 210 so as to cover the expanding second diaphragm 230 and the installed end of the second diaphragm 230. ) And a second spring 250 installed between the second spring 250 and the second orifice 211 and the second plate 260 mounted between the second diaphragm 230.

The regulator according to Patent Document 1 configured as described above performs a two-stage decompression process through the first and second decompression units to decompress the high-pressure gas fuel to the delivery pressure required by the engine.

However, the regulator according to Patent Literature 1 forms an orifice and a pressure reducing chamber in the first and second pressure reducing units, respectively, and includes a diaphragm and a valve, so that the internal configuration is complicated and the size of the product increases.

Accordingly, the regulator according to Patent Document 1 has a problem that the manufacturing process is complicated and workability is lowered, and the manufacturing cost of the product is unnecessarily increased.

Republic of Korea Patent Application No. 10-2009-0099639 (filed Oct. 20, 2009)

The present invention is to solve the above problems, an object of the present invention is to provide a regulator for reducing the high-pressure gas fuel to the desired delivery pressure through a two-stage pressure reduction process.

Another object of the present invention is to provide a regulator that can simplify the internal configuration and downsize the product.

According to a feature of the present invention for achieving the object as described above, the present invention forms the appearance and skeleton, the body is formed with a decompression chamber in which the gas fuel is decompressed to a predetermined delivery pressure, supplying the gas fuel into the body A first pressure reducing unit which is mounted on an outer side of the supply port and supplies the reduced pressure gas fuel through the supply port by primary pressure reduction of the high pressure gas fuel, And a second pressure reducing unit configured to secondaryly reduce the gaseous fuel to the discharge pressure.

The first pressure reducing unit includes a first case in which a first orifice is formed at the center of the first pressure reducing gas gas at a high pressure, a second case shielding one side of the first case and mounted to the supply port, and the first and first It is characterized in that it comprises a piston which is provided in the inner space of the two cases and the delivery flow path for delivering the gas fuel passing through the first orifice to the supply port.

The first pressure reducing unit may further include a spring that provides a restoring force to the piston to move the piston forward and backward based on the fuel pressure of the supply port.

The piston includes a cylindrical portion formed in a shorter length than a space formed inside the first and second cases, and a disc portion formed in a cylindrical shape at the tip of the cylindrical portion, and passes through the first orifice at the center of the piston. Characterized in that a delivery passage for delivering a gas fuel to the supply port is formed.

The front end of the delivery passage is characterized in that it is formed in a funnel shape, the diameter increases toward the front end of the piston.

The second decompression unit is a diaphragm that expands and contracts based on a supply and discharge pressure of a gas fuel delivered into the body, a balance spring that presses the diaphragm, and a lifting bar that moves up and down by expanding and contracting the diaphragm. And a valve mounted at the tip of the elevating bar to open and close an orifice for delivering gas fuel to the decompression chamber, wherein the diaphragm, the elevating bar, and the valve are installed along a straight line.

The body shields an upper surface of the main body and a main body having a lower body formed with a supply port for supplying gas fuel, a decompression chamber coupled to an upper portion of the lower body, and configured to decompress gas fuel to a predetermined discharge pressure. It includes an upper cover, wherein the lower body is formed with an inlet and outlet in which hot water is introduced and discharged, a hot water passage for moving hot water between the inlet and outlet and a circulation passage for circulating gas fuel supplied through the supply port It is characterized by.

The main body is provided with a discharge port for sending the gas fuel depressurized in the decompression chamber to the engine, the discharge pipe is coupled to the discharge port, the outer peripheral surface of the discharge pipe is spaced apart from the leading end of the discharge pipe by a predetermined interval A first annular jaw is formed at a position, and a first insertion groove into which the first annular jaw is inserted is formed at an inner circumferential surface of the outlet.

Hot water pipes are respectively coupled to the inlet and the outlet, second and third round jaws are formed at positions spaced apart from the front end of the hot water pipe by a predetermined interval on the outer circumferential surface of the hot water pipe, and the inner circumferential surfaces of the inlet and the outlet are respectively And second and third insertion grooves in which the second and third annular jaws are inserted.

When the gas pressure of the discharge port exceeds the normal range between the discharge port and the decompression chamber, a part of the gaseous fuel discharged through the discharge port is returned to the decompression chamber by the contraction pressure generated by the contracting operation of the diaphragm. It is characterized in that the bypass pipe is installed.

Between the main body and the upper cover is provided with a mounting member for mounting and fixing the second decompression unit, the mounting member is formed in a cylindrical shape of the upper diameter is larger than the lower diameter opening the upper and lower openings, A diaphragm is provided in the center, and a stepped jaw is formed on an outer circumferential surface of the mounting member, and a support jaw supporting the stepped jaw is formed on an inner circumferential surface of the main body.

The pressure of the gaseous fuel supplied to the first pressure reducing unit is 250 bar, the pressure of the primary pressure-reduced gas fuel is 4 ~ 5bar, the delivery pressure of the secondary pressure-reduced gas fuel is characterized in that 0.7bar.

As described above, the present invention decompresses the gaseous fuel of the high pressure liquid state to a predetermined delivery pressure through the first and second pressure reduction process and changes to a gas state to be sent to the engine.

In particular, the present invention can simplify the configuration of the first decompression unit for performing the first pressure reduction, coupled to the body, and the diaphragm and the valve of the second decompression unit can be arranged along a straight line to simplify the internal structure of the regulator.

In addition, the present invention may be formed to bend the circulating flow path in which the gas fuel is moved around the hot water flow path formed in a straight line on the lower body to prevent the icing of the gas fuel using the heat of the hot water.

Accordingly, the present invention can be produced by minimizing the size of the body to about 1/3 of the size of the regulator applied to the conventional CNG vehicle, thereby reducing the manufacturing cost and improving workability at the time of manufacture.

And the present invention rotatably installs the discharge pipe and the hot water pipe coupled to the inlet and outlet of the outlet and hot water respectively.

Accordingly, the present invention can rotate and combine the delivery pipe and the hot water pipe according to the shape and position of the fuel pipe and hot water circulation pipe for sending gas fuel from the regulator to the engine of the vehicle, the shape of the fuel pipe and hot water circulation pipe It can be applied to various vehicle models regardless of the position.

In addition, the present invention can maintain the fuel pressure of the supply port by moving forward and backward movement of the piston inside the first pressure reducing unit in accordance with the fuel pressure of the supply port.

In particular, the present invention forms the front end of the piston in the shape of a disk, and the front end of the delivery passage in a funnel shape to increase the delivery pressure by the forward and backward movement of the piston can quickly adjust the fuel pressure of the supply port.

In addition, in the present invention, when the discharge pressure of the discharge port exceeds the normal range, by returning a part of the gaseous fuel through the bypass pipe provided between the discharge port and the decompression chamber can be uniformly stabilized the discharge pressure of the discharge port.

In addition, the present invention can improve the discharge pressure droop performance of the regulator by preventing the discharge pressure is changed rapidly by adjusting the delivery pressure of the gas fuel using the bypass pipe.

1 is a perspective view of a regulator according to Patent Document 1. FIG.
2 and 3 are cross-sectional views of the first pressure reducing unit and the second pressure reducing unit shown in FIG.
4 is a perspective view of a regulator according to a preferred embodiment of the present invention.
5 is an exploded perspective view of the regulator shown in FIG. 4.
6 is a cross-sectional view of the regulator shown in FIG.
7 to 9 is an operating state diagram of a regulator according to an embodiment of the present invention.

Hereinafter, a regulator according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

4 is a perspective view of a regulator according to a preferred embodiment of the present invention, Figure 5 is an exploded perspective view of the regulator shown in Figure 4, Figure 6 is a cross-sectional view of the regulator shown in FIG.

As shown in Figure 4 and 5, the regulator according to a preferred embodiment of the present invention is installed on one side of the body 10, the body 10, which forms the appearance and the skeleton and the primary pressure of the high-pressure gas fuel And a second decompression unit 30 installed inside the first decompression unit 20 and the body 10 to secondaryly decompress gaseous fuel delivered from the first decompression unit 20.

The body 10 is made of a metal, for example, aluminum, and as shown in FIGS. 4 to 6, a supply port 111 through which gas fuel is supplied, a hot water flow path 112 through which hot water moves, and gas fuel circulate. The upper surface of the main body 12 and the main body 12 is coupled to the lower body 11, the lower body 11, the circulation passage 113 is formed and receives gaseous gaseous fuel from the circulation passage 113. It includes a top cover 13 for shielding.

5 and 6, the lower body 11 is formed in a cylindrical shape with an upper surface opened.

One side of the lower body 11 is provided with a first pressure reducing unit 20 is provided with a supply port 111 for supplying the first gas pressure reduced in the first pressure reducing unit 20, the lower body of the In the center is a circulation passage 113 for circulating the gas fuel to absorb the heat transferred from the hot water to change the gaseous fuel of the liquid state delivered from the first pressure reducing unit 20 through the supply port 111 to the gaseous state Is formed.

And both sides of the lower body 11 is formed with an inlet 114 and outlet 115 through which hot water is introduced and discharged, between the inlet 114 and the outlet 115 is a hot water flow passage 12 to move the hot water in a straight line It is formed along.

In general, the hot water absorbs the heat of the engine and thus has a temperature of about 60 to 80 ° C. As the gas fuel moves along the circulation passage 113, the icing is prevented by the heat transferred from the hot water.

Since the regulator according to the present embodiment is formed in about one-third the size of the conventional regulator, even if the hot water flow path 112 is formed in a straight line, the lower body 11 sufficiently absorbs the heat of the hot water, Maintain nearly the same temperature.

On the other hand, the circulation passage 113 is preferably formed to be bent along the entire surface of the lower body 11 to increase the contact area of the gaseous fuel.

In addition, as shown in FIGS. 5 and 6, the concave portion 116 is formed at the center of the lower body 11 so as to form a lifting space of the valve 34 provided in the second pressure reducing portion 30 to be described below. Is formed. The concave inlet 116 is connected to the end of the circulation passage 113 to deliver the gas fuel delivered through the circulation passage 113 to the orifice 123 of the main body 12.

As shown in FIG. 5, the main body 12 is formed in a cylindrical shape having an upper surface opened to form a decompression chamber 121 into which gaseous gaseous fuel is introduced.

A protrusion 122 protruding upward is formed at the center of the lower surface of the main body 12, and at one side of the main body 12, a gas outlet for delivering gas fuel from the decompression chamber 121 to the engine (not shown). 124 is formed.

The first orifice 123 is formed at the center of the protrusion 122 so as to receive the gas fuel circulated through the circulation passage 113, and the valve of the second pressure reducing unit 30 is formed in the space formed below the protrusion 122. 34 is installed to move up and down to open and close the first orifice 123.

The outlet pipe 124 is inserted into and coupled to the outlet 124, and an insertion groove 125 is formed at the edge of the outlet 124 so that the round jaw 151 of the outlet pipe 15 is inserted.

The round bar 151 of the delivery pipe 15 is formed to be stepped at a position spaced apart from the front end of the delivery pipe 15 by a predetermined interval. Accordingly, the delivery pipe 15 is fixed to the outer side of the delivery port 124 so as to be rotatable by the coupling plate 16 coupled to the main body 12 using a bolt.

A coupling groove is formed at one side of the coupling plate 16 to correspond to the diameter of the delivery pipe 15.

That is, the discharge pipe 15 is formed in a shape bent in one direction, the discharge pipe 15 is 360 as the ring jaw 151 is fixed by the coupling plate 16 in the state inserted into the insertion groove 125 ° can be rotated.

Similarly, an insertion groove is formed in the inlet 114 and the outlet 115 of the lower body 11, and a round jaw is formed in the outer peripheral surface of the front end of the hot water pipes 117 and 118 coupled to the inlet 114 and the outlet 115.

Accordingly, the present invention can rotate and combine the delivery pipe and the hot water pipe according to the shape and position of the fuel pipe and hot water circulation pipe for sending gas fuel from the regulator to the engine of the vehicle, the shape of the fuel pipe and hot water circulation pipe It can be applied to various vehicle models regardless of the position.

Between the main body 12 and the upper cover 13 is provided with a mounting member 14 for mounting and fixing the diaphragm 31 of the second pressure-sensitive portion 30 to be described below in a predetermined position.

To this end, the upper diameter of the mounting member 14 is formed larger than the lower diameter, the stepped portion 141 is formed in the center of the outer peripheral surface of the mounting member 14, the inner peripheral surface of the main body 12 of the mounting member 14 It is preferable that the support jaw 126 is formed to support the step 141.

The mounting member 14 is formed in a cylindrical shape with upper and lower openings, and a diaphragm 142 is provided at an inner center of the mounting member 14 to partition an upper and lower space, and the diaphragm 142 faces downward. A protruding stepped portion 143 is formed.

As shown in FIG. 5, the stepped portion 143 is formed to have an elliptic shape in an approximately elliptical shape in a direction perpendicular to the moving direction of the hot water. An insertion hole 144 into which the lifting bar 33 is inserted is formed, and as shown in FIG. 6, a connection hole 145 to which one end of the bypass pipe 17 is connected is formed.

In addition, a bypass pipe 17 is provided between the outlet 124 and the stepped portion 143 of the mounting member 14.

When the bypass pipe 17 is mounted between the outlet port 124 and the connection hole 145 of the stepped part 143, and the fuel pressure discharged through the outlet port 124 exceeds a preset normal range, Part of the gaseous fuel sent out by the contraction pressure generated while the diaphragm 21 is contracted upward is returned to the decompression chamber 121 again.

Accordingly, in the present invention, when the fuel pressure supplied from the bomb is unstable, some of the gaseous fuel at the outlet may be returned to the decompression chamber through the bypass pipe to stabilize the pressure of the gaseous fuel to be sent out.

In addition, the present invention can improve the discharge pressure droop performance of the regulator by preventing the discharge pressure is changed rapidly by adjusting the delivery pressure of the gas fuel using the bypass pipe.

As shown in FIG. 6, the upper cover 13 is formed to protrude upward to form an installation space 131 in which the second decompression unit 30 is installed. Shield the top.

The lower body 11, the main body 12 and the upper cover 13 are each provided with a plurality of flanges on the outer side, and each of the flanges is formed with a threaded coupling hole to be coupled using a bolt.

The first decompression unit 20 shields one side of the first case 21 and the first case 21 in which the second orifice 211 is formed in the center thereof, and the second case 22 mounted to the supply port 111. ), A piston 23 installed in the internal spaces of the first and second cases 21 and 22 and having a delivery passage 233 for delivering the gas fuel passing through the second orifice 211 to the supply port 111. ) And a spring 24 providing a restoring force to the piston 23.

The first case 21 is formed by connecting the input port 212 and the second orifice 211 to one side so as to receive the gas fuel, and the first opening part to form a space in which the spring 24 is installed on the other side. 213 is formed.

The second case 22 has a second opening 221 is formed on one side to be coupled to the outer circumferential surface of the first opening 213, the other side to correspond to the diameter of the supply port 111 to be mounted to the supply port 111 A mounting part 222 protruding is provided, and a transmission port 223 for transmitting the gas fuel transmitted from the piston 23 to the supply port 111 is formed at the center of the mounting part 222.

The piston 23 moves forward and backward in accordance with the primary pressure-reduced gas fuel and the fuel pressure on the supply port 111 while passing through the second orifice 211 to form a delivery pressure of the gas fuel.

To this end, the piston 23 is a disc formed in the shape of a disc at the tip of the cylindrical portion 231 and the cylindrical portion 231 is formed of a length slightly shorter than the space formed in the first and second cases (21, 22) The delivery passage 233 is formed to include a portion 232, the center is formed to increase in diameter toward the supply port 111.

The front end portion of the delivery passage 233 is preferably formed in a funnel shape in which the diameter gradually increases toward the front end in order to increase the delivery pressure due to the forward and backward movement of the piston 23.

The front surface of the disc portion 232 and the inner side of the second opening 221 is preferably formed in a shape corresponding to each other in close contact.

For example, when the spring 24 is set to a pressure of about 4 to 5 bar, when the fuel pressure of the supply port 111 exceeds about 4 to 5 bar which is the set pressure of the spring 24, the piston 23 While resiliently deforming the spring 24, the fuel pressure of the supply port 111 is reduced by moving backward toward the second leaf 211.

On the other hand, when the fuel pressure of the supply port 111 is less than 4 ~ 5bar, the piston 23 moves forward toward the supply port 111 by the restoring force of the spring 24 to increase the fuel pressure of the supply port 111 Let's do it.

Accordingly, the present invention can maintain the fuel pressure of the supply port by moving forward and backward movement of the piston inside the first pressure reducing unit according to the fuel pressure of the supply port.

In addition, the present invention is to form a front end of the piston in the shape of a disk, and the front end of the delivery passage in a funnel shape to increase the delivery pressure due to the forward and backward movement of the piston can quickly adjust the fuel pressure of the supply port.

As shown in FIGS. 5 and 6, the second decompression unit 30 balances the diaphragm 31 and the diaphragm 31 that expand and contract with the inflow and discharge of gaseous fuel in the decompression chamber 121. And a valve 34 mounted on the tip of the elevating bar 33 for elevating operation by the expansion and contraction operation of the spring 32, the diaphragm 31 and the elevating bar 33 to open and close the first orifice 123. do.

The diaphragm 31 is formed in a disc shape, and the outer edge portion is inserted and fixed between the main body 12 and the engaging surface of the upper cover 13.

The diaphragm 31 maintains a contracted state when the fuel pressure inside the decompression chamber 121 is equal to or less than a predetermined pressure, and expands upward when the fuel pressure exceeds the predetermined pressure.

The valve 34 is connected to the diaphragm 31 by the elevating bar 33, and normally maintains the first orifice 123 in an open state, and when the diaphragm 31 expands upward, the valve 34 moves upward. Close orifice 123.

A seat 341 formed in a ring shape slightly larger than the first orifice 123 is provided at the center of the upper surface of the valve 34 to completely shield the first orifice 123.

The sheet 341 preferably uses elastic rubber or synthetic resin.

Hereinafter, the operation of the regulator according to the preferred embodiment of the present invention will be described in detail with reference to FIGS. 7 to 9.

7 to 9 are operation state diagrams of a regulator according to an embodiment of the present invention.

In the present embodiment, a case in which the discharge pressure of the regulator is a preset normal range and a case exceeding the normal range will be described separately.

First, the operation in the case where the discharge pressure is in the normal range will be described with reference to FIG. 7.

First, in the state in which the regulator according to the present invention is stopped, as illustrated in FIG. 7, the piston 23 in the first decompression unit 20 is formed in the second case 22 by the elastic force of the spring 24. Keep in contact with the side.

Similarly, the diaphragm 31 in the second decompression unit 30 maintains the contracted state by the elastic force of the balance spring 32, and the position where the valve 34 installed at the lower end of the elevating bar 33 moves downward. As a result, the first orifice 123 of the main body 12 remains open.

Subsequently, when an ignition key (not shown) is operated, the electronic control unit of the vehicle opens the solenoid valve, and then controls the fuel pump and the multi-valve to pump the gas fuel stored in the cylinder to supply the regulator.

The gas fuel supplied to the regulator through the solenoid valve is supplied into the lower body 11 through the supply port 111, and is sent to the engine through the outlet 124 via the main body 12.

At this time, the hot water absorbing the heat of the engine starts to move through the inlet 14, the hot water passage 12 and the outlet 115, and as the temperature of the engine rises, the lower body 11 of the regulator Maintain a temperature approximately equal to the temperature.

The decompression process of the gaseous fuel in the circulation process of the gaseous fuel and hot water will be described in detail.

The gaseous fuel in the liquid state is supplied into the first decompression unit 20 through the input port 212, and is primarily decompressed while passing through the second orifice.

For example, the pressure of the gaseous fuel supplied through the input port 212 is about 250 bar, and the pressure of the primary pressure-reduced gaseous fuel is about 4-5 bar.

At this time, the piston 23 of the first decompression unit 20 moves forward and backward in accordance with the fuel pressure of the supply port 111 by the first pressure gas gas.

For example, when the fuel pressure of the supply port 111 exceeds the set pressure of the spring 24, about 4 ~ 5 bar when the spring 24 is set to a pressure of about 4 ~ 5 bar, the piston 23 is As shown in FIG. 8, the spring 24 is elastically deformed and moved backward toward the second leaf 211 to reduce the fuel pressure of the supply port 111.

On the other hand, when the fuel pressure of the supply port 111 is less than 4 ~ 5bar, the piston 23 moves forward toward the supply port 111 by the restoring force of the spring 24 as shown in Figure 7 again the supply port Increase the fuel pressure of 111.

Subsequently, the first pressure gas gas is supplied into the lower body 11 and heated while circulating through the circulation passage 113 to be changed into a gas state.

Since the valve 34 opens the first orifice 123, the gaseous fuel of the lower body 11 is transferred to the decompression chamber 121 of the main body 12 through the first orifice 123. The gaseous fuel supplied through the supply port 111 is secondly decompressed to a predetermined pressure, for example, about 0.7 bar, which is supplied into the decompression chamber 121 at a first reduced pressure, that is, about 4 to 5 bar.

In this way, the secondary pressure-reduced gas fuel is discharged to the engine through the discharge port 124.

Next, with reference to FIG. 9, operation | movement in case a delivery pressure exceeds a normal range is demonstrated.

If the pressure of the gaseous fuel supplied through the supply port 111 is abnormally high, the delivery pressure of the gaseous fuel supplied to the engine through the outlet 124 is the first body of the main body 12 through the orifice 123 Even if the pressure is reduced in the process of being delivered to the decompression chamber 121, it exceeds the normal range, for example, 0.7 bar.

Thus, as shown in FIG. 9, the diaphragm 31 contracts upward as the delivery pressure of the delivery port 124 increases, and the lifting bar 33 connected to the diaphragm 31 moves upward.

Then, as the valve 34 installed at the lower end of the elevating bar 33 moves upward to close the first orifice 123, the gas at the outlet port 124 is caused by the contraction pressure caused by the contraction operation of the diaphragm 31. Some of the fuel is returned to the decompression chamber 121 through the bypass pipe 17.

Accordingly, in the present invention, when the discharge pressure of the discharge port exceeds the normal range, it is possible to stabilize the delivery pressure constant by returning some of the gaseous fuel through the bypass pipe.

Through the above-described process, the present invention depressurizes the gaseous fuel of the high pressure liquid state to a predetermined discharge pressure through the first and second decompression process, and icing the gaseous fuel of high pressure gas state using the heat of hot water. The engine is supplied to the engine by preventing the gas, and some of the gaseous fuel discharged according to the supply pressure is returned to keep the discharge pressure constant.

The scope of the present invention is not limited to the embodiments described above, but is defined by the claims, and various changes and modifications can be made by those skilled in the art within the scope of the claims. It is self evident.

In the above embodiment, the regulator is applied when the fuel pressure such as compressed hydrogen gas or compressed natural gas is high pressure, but the present invention is not necessarily limited thereto.

That is, the present invention is to remove the first pressure reducing unit for reducing the high-pressure fuel pressure to the first pressure to reduce the gas fuel supplied at low pressure, such as 4-5 bar, such as a liquefied petroleum gas gas injection (Liquefied Petroleum gas Gaseous Injection) system The pressure may be changed to reduce the pressure to a preset delivery pressure.

10: Body 11: Lower Body
111: supply port 112: hot water flow path
113: circulation passage 114: inlet
115: outlet 116: recessed portion
12: main body 121: decompression chamber
122: protrusion 123: first orifice
124: outlet 125: insertion groove
126: support jaw 13: top cover
131: installation space 14: mounting member
141: step 142: diaphragm
143: step 144: insertion hole
145: connector 15: delivery pipe
151: Sill 16: Coupling Plate
17: bypass pipe 20: second pressure reducing unit
21: first case 22: second case
23: piston 24: spring
30: second pressure reducing portion 31: diaphragm
32: balance spring 33: lifting bar
34: valve 341: seat

Claims (12)

A body in which a decompression chamber is formed which forms an appearance and a skeleton and decompresses the gas fuel at a predetermined discharge pressure;
A first pressure reducing unit mounted outside the supply port for supplying the gas fuel into the body and supplying the reduced pressure gas fuel through the supply port by first reducing the high pressure gas fuel;
And a second decompression unit installed inside the body and configured to secondly decompress gas fuel, which is primarily depressurized from the first decompression unit, to the delivery pressure. The method of claim 1, wherein the first decompression unit
A first case in which a first orifice is formed at the center to primarily depressurize the high-pressure gas fuel;
A second case shielding one side of the first case and mounted to the supply port;
And a piston installed in the inner spaces of the first and second casings and having a delivery passage for delivering gas fuel passing through the first orifice to the supply port. The method of claim 2, wherein the first decompression unit
And a spring providing restoring force to the piston to move the piston forward and backward based on the fuel pressure of the feed port. The method of claim 3, wherein the piston
A cylindrical portion formed to have a length shorter than a space formed inside the first and second cases;
It includes a disk portion formed in a cylindrical shape at the tip of the cylindrical portion,
And a transfer passage through which the gas fuel passing through the first orifice passes to the supply port is formed at the center of the piston. The tip portion of the delivery passage according to claim 4
Regulator characterized in that it is formed in a funnel shape, the diameter increases toward the tip of the piston. The method of claim 2, wherein the second decompression unit
A diaphragm that expands and contracts based on a supply and discharge pressure of a gaseous fuel delivered into the body,
A balance spring for pressing the diaphragm,
An elevating bar for elevating operation by expanding and contracting the diaphragm;
A valve mounted to the tip of the elevating bar to open and close an orifice for delivering gas fuel to the decompression chamber,
The diaphragm, the lifting bar and the valve is characterized in that the regulator is installed along a straight line. The method of claim 6, wherein the body is
A lower body in which a supply port for supplying gas fuel is formed;
A main body coupled to an upper portion of the lower body and having a decompression chamber configured to decompress gas fuel to a predetermined discharge pressure;
An upper cover which shields an upper surface of the main body,
The lower body regulator is characterized in that the inlet and outlet in which hot water is introduced and discharged, a hot water flow path for the hot water is moved between the inlet and the discharge port and a circulation flow path for the gas fuel supplied through the supply port is circulated. The method of claim 7, wherein
The main body is provided with a discharge port for sending the gas fuel depressurized in the decompression chamber to the engine,
The outlet pipe is coupled to the outlet,
A first annular jaw is formed on the outer circumferential surface of the delivery pipe at a position spaced apart from the front end of the delivery pipe by a predetermined interval,
The inner peripheral surface of the discharge port regulator, characterized in that the first insertion groove is formed is inserted into the jaw. The method of claim 8,
Hot water pipes are respectively coupled to the inlet and the outlet,
On the outer circumferential surface of the hot water pipe, second and third annular jaws are formed at positions spaced apart from the front end of the hot water pipe by a predetermined interval,
Regulators, characterized in that the inner circumferential surface of the inlet and outlet port is formed with a second and third insertion groove for inserting the second and third ring jaw respectively. The method of claim 9, wherein between the outlet and the decompression chamber
When the gas pressure of the discharge port exceeds the normal range, there is provided a bypass pipe for returning some of the gaseous fuel discharged through the discharge port to the decompression chamber by the contraction pressure generated by the contraction operation of the diaphragm. A regulator characterized by the above. The method of claim 10,
Between the main body and the upper cover is provided with a mounting member for mounting and fixing the second decompression unit,
The mounting member is formed in a cylindrical shape with the upper and lower opening is larger than the lower diameter,
A diaphragm is provided at the center of the mounting member, and a step is formed at the outer circumferential surface of the mounting member.
The inner peripheral surface of the main body regulator characterized in that the supporting jaw is formed for supporting the step. 12. The method according to any one of claims 1 to 11,
The pressure of the gaseous fuel supplied to the first pressure reducing unit is 250 bar,
The pressure of the first reduced gas fuel is 4 ~ 5bar,
And a discharge pressure of the secondary pressure-reduced gaseous fuel is 0.7 bar.

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