KR20220033893A - High pressure regulator for hydrogen - Google Patents

Abstract

The present invention relates to a high-pressure regulator for hydrogen. The high-pressure regulator according to an embodiment of the present invention comprises: an upper body having an inlet port and an outlet port; a piston provided in the upper body and mounted to be movable up and down along the axial direction of the upper body; a seat provided with an orifice formed inside the upper body; and a valve provided to pass through the seat, and mounted to be movable up and down in the axial direction so that the orifice for regulating a pressure of a supplied fluid is formed. The inlet port may include: a housing having an inlet passage through which the fluid is supplied; and a filter coupled to one side of the housing and having a three-dimensional shape to have a filtering area larger than a discharge area of the inlet passage. An objective of the present invention is to provide the high-pressure regulator for hydrogen which reduces generation of a differential pressure when high-capacity hydrogen is supplied.

Description

High pressure regulator for hydrogen

The present invention relates to a high-pressure regulator for hydrogen, and more particularly, to a high-pressure regulator for hydrogen that reduces generation of a differential pressure when a high-capacity hydrogen is supplied.

In general, a regulator for pressure control maintains the pressure on the output side in a certain range regardless of the pressure fluctuation on the input side, and is used in various industries such as chemistry, oil refining, and gas. For example, since a fuel cell vehicle uses a high-pressure tank to increase the mileage, a high-pressure regulator is essential to reduce fuel pressure. In particular, it is one of the important design factors for a regulator for automobiles to have a compact/light weight structure while maintaining operational reliability and durability.

The related art high pressure regulator includes a first pressure reduction chamber and a second pressure reduction chamber that are in communication with each other through an intermediate connection passage, an inlet and an outlet formed to communicate with the first pressure reduction chamber and the second pressure reduction chamber, respectively, the first pressure reduction chamber and the second pressure reduction chamber 2 It includes a first piston and a second piston facing each of the decompression chambers, and a valve shaft and a spring in communication with the inlet. In terms of the structure in which a plurality of decompression chambers are separated, the regulator has a limitation in that it is difficult to reduce the size/light weight while maintaining operational reliability and durability.

In addition, the conventional regulator is provided with a filter to reduce the inflow of foreign substances when high-capacity hydrogen is supplied, but there is a problem in that hydrogen supply is not smooth and hydrogen embrittlement is increased due to the occurrence of a differential pressure.

The present invention is to solve the above problems, and to provide a high-pressure regulator for hydrogen that reduces the generation of a differential pressure when a high-capacity hydrogen is supplied.

Another object of the present invention is to provide a high-pressure regulator capable of reducing the size/light weight while maintaining durability because of its simple configuration, and the valve is stably supported so that efficient pressure reduction is possible through the orifice between the seat and the valve, while ensuring operational reliability.

The technical problems to be solved in the present invention are not limited thereto, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

A high-pressure regulator for hydrogen according to an embodiment of the present invention for solving the above technical problem, an upper body having an inlet port and an outlet port; a piston provided in the upper body and mounted to be movable up and down along the axial direction of the upper body; a sheet having an orifice formed therein; and a valve provided to pass through the seat, and mounted to be movable up and down in the axial direction so that the orifice for regulating the pressure of the supplied fluid is formed. It includes, The inlet port, the housing in which the fluid is supplied is formed an inlet flow path; and a filter coupled to one side of the housing and having a three-dimensional shape to have a larger filtering area than a discharge area of the inlet passage.

In this case, the filter may include a flange portion in contact with one side of the housing; a side portion extending from the flange portion and having an inclined surface; and a cap portion extending from the side portion and perpendicular to the longitudinal direction of the inlet passage.

In this case, the inner diameter of the side portion may decrease along the moving direction of the fluid.

In this case, the inlet port may further include a coupling member for coupling the filter to one side of the housing.

At this time, the coupling member is made of a cylindrical shape, the first coupling portion coupled to the housing; and a second coupling part extending from the first coupling part in a direction perpendicular to the longitudinal direction of the inlet passage, wherein the flange part may be fixed between one side of the housing and the second coupling part.

In this case, a contact surface in contact with the inner surface of the upper body is formed on the outer surface of the inlet port, and an O-ring for preventing fluid leakage may be provided on the contact surface.

In this case, the O-ring may include a first O-ring; a second O-ring spaced apart from the first O-ring and having a larger diameter than the first O-ring; and a third O-ring disposed to be spaced apart from the second O-ring and having a smaller diameter than the second O-ring.

In this case, a screw thread disposed to be spaced apart from the contact surface may be formed on an outer surface of the inlet port, and a screw tab corresponding to the screw thread may be formed on an inner surface of the upper body.

In this case, a discharge passage formed along a direction perpendicular to the axial direction is provided on the upper side of the sheet, and the fluid pressure-reduced through the orifice may be moved to the discharge passage.

In this case, the outlet port communicates with the discharge passage, and the depressurized fluid may be discharged through the outlet port.

In this case, the upper body may be provided with a step portion opposite to one side of the housing, and the flange portion may be fixed between one side of the housing and the step portion.

At this time, the sheet may be provided to be insertable from the upper side of the upper body.

In this case, a stopper may be provided on the upper side of the sheet to prevent separation of the sheet.

In this case, a fixing part for fixing the stopper may be provided between the piston and the stopper.

The high-pressure regulator according to an embodiment of the present invention minimizes the generation of differential pressure when supplying high-capacity hydrogen to facilitate hydrogen supply and reduce hydrogen embrittlement.

In addition, by securing the durability of the inlet port as the generation of differential pressure is minimized, it is possible to reduce the size and weight.

It should be understood that the effects of the present invention are not limited to the above-described effects, and include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a perspective view illustrating a high-pressure regulator for hydrogen according to an embodiment of the present invention.
2 is a cross-sectional view illustrating a high-pressure regulator for hydrogen according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view mainly showing the seat and the orifice of FIG. 2 .
Figure 4 is an exploded perspective view showing the inlet port of Figure 2;
FIG. 5 is an enlarged view showing A shown in FIG. 2 .
6 is a graph comparing performance of a conventional filter and a filter according to an embodiment of the present invention.
7 is a perspective view illustrating a high-pressure regulator for hydrogen according to another embodiment of the present invention.
8 is a cross-sectional view illustrating a high-pressure regulator for hydrogen according to another embodiment of the present invention.
9 is an exploded perspective view showing the inlet port of FIG.
10 is a cross-sectional view showing a state in which the inlet port is separated from B shown in FIG.
11 is an enlarged view showing B shown in FIG.

Hereinafter, various embodiments will be described in more detail with reference to the accompanying drawings. Embodiments according to the present invention can be variously modified. Certain embodiments may be depicted in the drawings and described in detail in the detailed description. However, the specific embodiments disclosed in the accompanying drawings are only provided to facilitate understanding of the various embodiments. Therefore, the technical spirit is not limited by the specific embodiments disclosed in the accompanying drawings, and it should be understood to include all equivalents or substitutes included in the spirit and scope of the invention.

Terms including an ordinal number such as 1st, 2nd, etc. may be used to describe various components, but these components are not limited by the above-mentioned terms. The above terminology is used only for the purpose of distinguishing one component from another component.

In the embodiments of the present invention, terms such as “comprises” or “have” are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the embodiments of the present invention exist, It should be understood that this does not preclude the possibility of addition or existence of one or more other features or numbers, steps, operations, components, parts, or combinations thereof. When a component is referred to as being “connected” or “connected” to another component, it may be directly connected or connected to the other component, but it is understood that other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

Meanwhile, a “module” or “unit” for a component used in an embodiment of the present invention performs at least one function or operation. In addition, a “module” or “unit” may perform a function or operation by hardware, software, or a combination of hardware and software. In addition, a plurality of “modules” or a plurality of “units” other than a “module” or “unit” to be performed in specific hardware or to be executed in at least one processor may be integrated into at least one module. The singular expression includes the plural expression unless the context clearly dictates otherwise.

In addition, in describing the embodiment of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be abbreviated or omitted.

1 is a perspective view showing a high-pressure regulator for hydrogen according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing a high-pressure regulator for hydrogen according to an embodiment of the present invention, and FIG. 3 is a sheet and an orifice of FIG. It is a cross-sectional view showing the main focus.

1 to 3 , the high-pressure regulator for hydrogen according to an embodiment of the present invention includes an upper body 100 , a piston 200 , a seat 300 , and a valve 400 .

In one embodiment of the present invention, the arrow direction of the X-axis means the upper direction of the upper body (100). And, the downward direction of the upper body 100 means a direction opposite to the direction of the arrow of the X-axis.

The upper body 100 is provided with at least one port in the axial direction (a) and the radial direction (r). Here, the axial direction (a) is parallel to the Z-axis direction, and the radial direction (r) is perpendicular to the axial direction (a). The upper body 100 is made of an aluminum material, and the surface of the upper body 100 is made of a porous oxide film.

The piston 200 is provided inside the upper body 100 . The piston 200 is mounted inside the upper body 100 to be movable up and down along the axial direction (a). The piston 200 is provided with an elastic force by the first spring 210 . The elastic force applied to the piston 200 may be varied through an upper cap 600 to be described later to control the degree of decompression of the high-pressure fluid. Here, the high-pressure fluid includes high-pressure hydrogen gas.

In addition, the upper body 100 is formed so that the upper side of the upper body 100 is opened. In addition, the upper body 100 is provided with an upper cap 600 for opening and closing the upper surface of the upper body 100 . An O-ring 610 supported by the inner circumferential surface of the upper body 100 is provided on the outer circumferential surface of the upper cap 600 to prevent leakage of high-pressure fluid and to prevent inflow of external foreign substances such as moisture.

The sheet 300 is provided such that the orifice 320 is formed inside the upper body 100 as shown in FIG. 3 . The sheet 300 may be made of a polyamideimide (PAI) material. As the polyamideimide engineering plastic, it has the advantages of melt processability of thermoplastic resins and excellent performance of thermosetting polyimides. It has similar strength, impact resistance, and abrasion resistance to metals, and also has good processability including heat treatment.

The valve 400 is provided inside the upper body 100 so as to penetrate the seat 300 . The valve 400 is mounted inside the upper body 100 to be movable up and down along the axial direction (a) so that the orifice 320 for regulating the pressure of the supplied high-pressure fluid is formed.

The valve 400 is disposed inside the upper body 100 to be vertically movable in a concentric shape with the upper body 100 , and an orifice 320 formed between the seat 300 and the valve 400 . ) to change the flow cross-sectional area.

A second spring 830 for elastically pressing the valve 400 is provided under the valve 400 .

The upper body 100 may be provided with a sensor (not shown) for measuring the outlet pressure of the decompressed fluid. The pressure of the fluid supplied to the upper body 100 corresponds to 2.5 ~ 87.5 MPa, so the fluctuation range of the pressure is very large, but the pressure of the fluid decompressed while passing through the orifice 320 corresponds to approximately 2.2 MPa. The pressure of the fluid remains stable.

In addition, according to an embodiment of the present invention, the high-pressure fluid is decompressed while passing through the orifice 320 formed between the seat 300 and the valve 400 . And, the piston 200 is moved up and down according to the pressure of the depressurized fluid. At this time, the valve 400 opens or closes the orifice 320 while moving up and down together with the piston 200 in conjunction with the vertical movement operation of the piston 200 .

In addition, as shown in FIG. 3 , a contact surface 310 capable of contacting the upper surface of the valve 400 is formed at the lower end of the inner circumferential surface of the seat 300 . The contact surface 310 has the same slope θ as the upper surface of the valve 400 . When the valve 400 moves up and down while the upper surface of the seat 300 is in contact with the contact surface 310 of the seat 300, the orifice 320 is stably formed, so that the high pressure for hydrogen The operating reliability of the regulator is ensured.

In addition, the at least one port provided in the upper body 100 is provided as an inlet port 700 to which a high-pressure fluid is supplied, an outlet port 500 to which the decompressed fluid is discharged, and a bypass port 900 .

An inlet passage 711 through which the high-pressure fluid moves is formed in the inlet port 700 . In addition, a screw tab 790 is formed on the inner surface of the upper body 100 , and the outer surface of the inlet port 700 is screwed to the screw tab 790 , and the inlet port 700 is the It is coupled with the upper body 100 .

A filter 720 for removing foreign substances from the high-pressure fluid is provided on one side of the inlet port 700 . After the high-pressure fluid passes through the filter 720 , it is moved to the supply space 170 . The inlet port 700 will be described in detail later with reference to the drawings.

A discharge passage 550 formed along a radial direction r, which is a direction perpendicular to the axial direction a, is provided on the upper side of the sheet 300 . And, the outlet port 500 is in communication with the discharge passage (550).

A contact surface in contact with the inner surface of the upper body 100 is formed on the outer surface of the outlet port 500 , and an O-ring 510 for preventing leakage of fluid discharged in a decompressed state is provided on the contact surface. The O-ring 510 is made of an Ethylene Propylene Diene Monomer (EPDM) material. However, the O-ring 510 is not limited to being made of only ethylene propylene rubber, and may be made of various materials that maintain durability in a high pressure state.

In addition, a lower body 800 having the bypass port 900 is provided on a lower side of the upper body 100 . At this time, the lower body 800 is coupled to the upper body 100 in a screw coupling method through the screw tab 820 .

A contact surface for surface contact with the upper body 100 is formed on the upper side of the lower body 800 , and an O-ring 810 for preventing fluid leakage is provided on the contact surface. The O-ring 810 prevents leakage of high-pressure fluid and prevents the inflow of external foreign substances such as moisture.

In addition, the bypass port 900 may be mounted to the lower body 800 through a screw fastening method using a screw tab 930 . The user manually separates the bypass port 900 from the lower body 800 to discharge the fluid inside the upper body 100 .

Figure 4 is an exploded perspective view showing the inlet port of Figure 2, Figure 5 is an enlarged view showing A shown in Figure 2.

4 and 5 , the inlet port 700 of the high-pressure regulator for hydrogen according to an embodiment of the present invention includes a housing 710 and a filter 720 .

An inlet passage 711 to which a fluid is supplied is formed in the housing 710 .

The filter 720 is coupled to one side of the housing 710 . The filter 720 has a three-dimensional shape to have a larger filtering area than the discharge area S of the inlet passage 711 . That is, the filtering area of the filter 720 is greater than the discharge area S of the inlet passage 711 so that the high-pressure fluid supplied through the inlet passage 711 is not restricted from moving by the filter 720 . become big Accordingly, in the three-dimensional shape of the filter 720 , the generation of a differential pressure, which is a pressure difference between the supplied high-pressure fluid before passing through the filter 720 and after passing through the filter 720 , is reduced.

In one embodiment of the present invention, the filter 720 having a three-dimensional shape includes a flange portion 721 in contact with one side of the housing 710, a side portion extending from the flange portion 721 and having an inclined surface ( 722 ) and a cap portion 723 extending from the side portion 722 . The side part 722 and the cap part 723 form a filtering area, and the area of the side part 722 and the cap part 723 is a filtering area.

The flange portion 721 is configured to be coupled to the housing 710 .

The side part 722 is configured to increase the filtering area of the filter 720 . That is, as the width of the side portion 722 increases, the filtering area of the filter 720 increases. Also, the side portion 722 has a truncated cone shape. That is, the inner diameter of the side portion 722 decreases along the moving direction of the high-pressure fluid. At this time, the side part 722 is provided with an inclined surface, so that the high-pressure fluid does not pass through only the cap part 723 intensively, and the high-pressure fluid is induced to properly pass through the side part 722 .

The cap portion 723 is formed to be perpendicular to the longitudinal direction of the inlet passage 711 . That is, the cap portion 723 has an approximately planar shape. After the high-pressure fluid has properly passed through the side portion 722 , the remaining high-pressure fluid passes through the cap portion 723 . In addition, according to various embodiments of the present disclosure, the cap portion 723 may have a curved shape to withstand excessively increased pressure of the high-pressure fluid.

On the other hand, the supply space 170 (refer to FIG. 1 ) is larger than the width L1 along the diameter of the side part 722 and the first supply area 171 and the width L1 along the diameter of the side part 722 . It is separated by a small second supply area 172 .

The width L2 along the diameter of the first supply region 171 is larger than the width L1 along the diameter of the second side part 722 , so that the high-pressure fluid is supplied through the side part 722 . It is smoothly moved to the area 171 . Accordingly, the difference between the pressure in the interior 720a of the filter 720 and the pressure in the first supply region 171 , that is, the generation of a differential pressure is reduced.

The second supply region 172 is formed to be spaced apart from the cap part 723 . That is, since the second supply region 172 is spaced apart from the filter 720 and the width of the second supply region 172 is smaller than the width of the side portion 722 , the second supply region 172 is The responsiveness of the high-pressure regulator for hydrogen may be increased by increasing the moving speed of the high-pressure fluid without affecting the generation of a differential pressure between the first supply region 171 and the side portion 722 .

In addition, the inlet port 700 is provided with a coupling member 730 for coupling the filter 720 to one side of the housing 710 .

The coupling member 730 is formed in a cylindrical shape and is perpendicular to the longitudinal direction of the inlet passage 711 from the first coupling part 731 and the first coupling part 731 coupled to the housing 710 . A second coupling portion 732 extending in the direction is provided.

The second coupling part 732 is spaced apart from one side of the housing 710 , and a coupling groove corresponding to the flange part 721 is formed between the second coupling part 732 and one side of the housing 710 . is formed

As the flange part 721 is fixed between one side of the housing 710 and the second coupling part 732 , the filter 720 is coupled to the housing 710 .

In addition, a contact surface 712 in contact with the inner surface of the upper body 100 (refer to FIG. 2 ) is formed on the outer surface of the housing 710 . An O-ring 740 for preventing leakage of high-pressure fluid is provided on the contact surface 712 .

The O-ring 740 is made of an Ethylene Propylene Diene Monomer (EPDM) material. However, the O-ring 740 is not limited to being made of only ethylene propylene rubber, and may be made of various materials that maintain durability in a high pressure state.

The O-ring 740 includes a first O-ring 741 , a second O-ring 742 and a second O-ring 742 spaced apart from the first O-ring 741 and having a diameter greater than a diameter of the first O-ring 741 . ) and a third O-ring 743 that is spaced apart and smaller than the diameter of the second O-ring 742 .

The first O-ring 741 primarily blocks foreign substances from being introduced, and the second O-ring 742 blocks foreign substances that have passed through the first O-ring 741 from being introduced.

In addition, the third O-ring 743 primarily blocks the high-pressure fluid from leaking to the outside, and the second O-ring 742 blocks the high-pressure fluid passing through the third O-ring 743 from leaking to the outside. do.

A diameter of the first O-ring 741 is the same as a diameter of the third O-ring 743 . Also, according to various embodiments of the present disclosure, a diameter of the first O-ring 741 may be different from a diameter of the third O-ring 743 .

The second O-ring 742 is disposed between the first O-ring 741 and the third O-ring 743 . The second O-ring 742 may be disposed between the first O-ring 741 and the third O-ring 743 to minimize contact with the high-pressure fluid. That is, when the high-pressure fluid is hydrogen, the second O-ring 742 minimizes contact with the hydrogen, so that the breakage of the second O-ring 742 by hydrogen is reduced.

In addition, a screw thread 791 disposed to be spaced apart from the contact surface 712 is formed on the outer surface of the housing 710 . In addition, a screw tab 790 corresponding to the screw thread 791 is formed on the inner surface of the upper body 100 (refer to FIG. 2 ).

When the screw thread 791 is screwed to the screw tab 790 , the inlet port 700 is fixed to the upper body 100 .

In addition, a hexagonal bolt 780 is formed on the outer surface of the housing 710 to be spaced apart from the screw thread 791 . The hexagon bolt 780 is provided so that a user can conveniently rotate the inlet port 700 using a tool, so that the inlet port 700 is screwed to the upper body 100 .

In addition, the other side of the housing 710 is connected to a supply pipe (not shown) through which the high-pressure fluid is moved, and an O-ring 750 for preventing leakage of the high-pressure fluid from the supply pipe is provided on the other side of the housing 710 .

6 is a graph comparing the performance of a conventional filter and a filter according to an embodiment of the present invention.

A conventional filter is formed in a planar shape and does not have a three-dimensional shape. That is, the filtering area of the conventional filter is the same as the discharge area S (refer to FIG. 4 ).

A filtering area of the filter according to an embodiment of the present invention is approximately twice as large as that of a conventional filter. However, the filtering area of the filter according to the exemplary embodiment of the present invention is not limited to being twice as large as that of the conventional filter.

The first line L1 shown in FIG. 6 represents the differential pressure (MPa) according to the flow rate (LPM) of the high-pressure fluid when a conventional filter is used for the inlet port.

And, the second line L2 shown in FIG. 6 represents the differential pressure (MPa) according to the flow rate (LPM) of the high-pressure fluid when the filter according to the embodiment of the present invention is used for the inlet port.

When the flow rate (LPM) of the high-pressure fluid is approximately 900 LPM, the differential pressure (MPa) of the conventional filter is 0.043 MPa, and the differential pressure (MPa) of the filter according to an embodiment of the present invention is 0.011 MPa.

When the flow rate (LPM) of the high-pressure fluid is approximately 1800 LPM, the differential pressure (MPa) of the conventional filter is 0.086 MPa, and the differential pressure (MPa) of the filter according to an embodiment of the present invention is 0.022 MPa. As the flow rate of the high-pressure fluid increases, both the differential pressures of the conventional filter and the filter according to an embodiment of the present invention increase by approximately two times.

When the flow rate (LPM) of the high-pressure fluid is approximately 1800 LPM, the differential pressure (MPa) of the conventional filter is 0.086 MPa, and the differential pressure (MPa) of the filter according to an embodiment of the present invention is 0.022 MPa. As the flow rate of the high-pressure fluid increases, both the differential pressures of the conventional filter and the filter according to an embodiment of the present invention increase by approximately two times.

When the flow rate (LPM) of the high-pressure fluid is approximately 3500 LPM, the differential pressure (MPa) of the conventional filter is 0.168 MPa, and the differential pressure (MPa) of the filter according to an embodiment of the present invention is 0.042 MPa.

The differential pressure (MPa) of the filter according to an embodiment of the present invention is about 1/4 of that of the conventional filter regardless of the flow rate of the high-pressure fluid.

As such, the filter of the high-pressure regulator for hydrogen according to an embodiment of the present invention reduces the generation of differential pressure compared to the conventional filter. Accordingly, the high-pressure regulator for hydrogen according to an embodiment of the present invention stably supplies the high-pressure fluid as the differential pressure is reduced.

7 is a perspective view illustrating a high-pressure regulator for hydrogen according to another embodiment of the present invention, FIG. 8 is a cross-sectional view illustrating a high-pressure regulator for hydrogen according to another embodiment of the present invention, and FIG. 9 is an inlet port of FIG. It is an exploded perspective view, FIG. 10 is a cross-sectional view showing a state in which the inlet port is separated from B shown in FIG. 7 , and FIG. 11 is an enlarged view showing B shown in FIG. 7 .

7 to 11, the high-pressure regulator for hydrogen according to another embodiment of the present invention, the upper body 100', the piston 200', the seat 300', the valve 400', the outlet port 500 ′, an upper cap 600 ′, an inlet port 700 ′, a lower body 800 ′, and a bypass port 900 ′. The same or similar components to those of the above-described embodiment will be substituted for the above description, and the seat 300' and the inlet port 700' will be mainly described.

The sheet 300 ′ is provided such that the orifice 320 ′ is formed inside the upper body 100 , as shown in FIG. 8 . In addition, the sheet 300' is provided to be insertable from the upper side of the upper body 100'. Accordingly, when the seat 300' is damaged, the user separates the upper cap 600' and the piston 200' provided on the upper side of the seat 300', and then the seat 300'. can be conveniently replaced.

A contact surface in surface contact with the inner surface of the upper body 100 is formed on the lower surface of the seat 300 ′, and an O-ring 310 ′ for preventing fluid leakage is provided on the contact surface.

In addition, according to another embodiment of the present invention, a stopper 330 ′ is provided on the upper side of the seat 300 ′ to prevent the seat 300 ′ from being separated from the inside of the upper body 100 ′. .

The stopper 330' has a force that does not prevent the orifice 320' from being formed according to the vertical movement of the seat 300' of the seat 300'. pressurize That is, when the stopper 330 ′ excessively presses the sheet 300 ′, the formation of the orifice 320 ′ may be inhibited. In addition, when the stopper 330 ′ weakly presses the seat 300 ′, the seat 300 ′ is separated from the inside of the upper body 100 so that the valve 400 ′ moves up and down. The orifice 320' may not be formed.

In addition, a fixing part 340' for fixing the stopper 330' is provided between the piston 200' and the stopper 330'. A screw threaded bolt 341 ′ is formed on a lower surface of the fixing part 340 ′, and the bolt 341 ′ may be fastened through the upper surface of the stopper 330 ′. Accordingly, the stopper 330 ′ stably presses the sheet 300 ′ to prevent the sheet 300 ′ from being separated.

The inlet port 700' of the high-pressure regulator for hydrogen according to another embodiment of the present invention includes a housing 710' and a filter 720'.

An inlet passage 711 ′ to which a high-pressure fluid is supplied is formed in the housing 710 ′. In this case, the inlet passage 711 ′ includes a first inlet passage 711a ′ having a first discharge area S1 and a second discharge passage S2 having a second discharge area S2 larger than the first discharge area S1 . An inlet passage 711b' is provided. An inclined surface 711c' is formed on the inner surface of the housing 710' on which the second inlet passage 711b' is formed. That is, the second discharge area S2 of the second inlet passage 711b ′ increases along the direction in which the fluid moves. Accordingly, the pressure of the high-pressure fluid moved along the first inlet passage 711a' is reduced in the second inlet passage 711b', before the high-pressure fluid passes through the filter 720' and the filter. The generation of differential pressure, which is the pressure difference after passing through 720', is reduced.

In another embodiment of the present invention, the filter 720' having a three-dimensional shape is formed from a flange part 721' in contact with one side 713' of the housing 710', and from the flange part 721'. It includes a side portion 722' extending and having an inclined surface, and a cap portion 723' extending from the side portion 722'. The side part 722' and the cap part 723' form a filtering area, and the area of the side part 722' and the cap part 723' is a filtering area.

The flange portion 721 ′ contacts one side 713 ′ of the housing 710 ′.

In addition, the upper body 110' is provided with a step portion 171a' opposite to one side 713' of the housing 710'. In addition, the step portion 171a' is provided to be formed parallel to one side 713' of the housing 710'.

According to another embodiment of the present invention, the flange portion 721' is fixed between one side 713' of the housing 710' and the step portion 171'. For example, as shown in FIGS. 10 and 11 , while the inlet port 700 ′ is inserted into the upper body 100 ′, one side 713 ′ of the housing is connected to the flange portion 721 . '), the flange portion 721' comes into contact with the step portion 171a'. And, when one side 713' of the housing continues to press the flange part 721', the flange part 721' is sandwiched between the one side 713' of the housing and the step part 171a'. is fixed That is, according to another embodiment of the present invention, the filter 720' can be stably fixed without the coupling member of the above-described embodiment.

The side part 722' is configured to increase the filtering area of the filter 720'. That is, as the width of the side portion 722' increases, the filtering area of the filter 720' increases. In addition, the side portion 722' is formed in a truncated cone shape. That is, the inner diameter of the side portion 722 ′ decreases along the moving direction of the high-pressure fluid. At this time, the side portion 722' is provided with an inclined surface, so that the high-pressure fluid does not pass intensively only to the cap portion 723', so that the high-pressure fluid is properly passed through the side portion 722'.

The cap portion 723 ′ is formed to be perpendicular to the longitudinal direction of the inlet passage 711 ′. That is, the cap portion 723 ′ has an approximately planar shape. After the high-pressure fluid has properly passed through the side portion 722', the remaining high-pressure fluid passes through the cap portion 723'. In addition, according to various embodiments of the present disclosure, the cap portion 723 ′ has a curved shape to withstand excessively increased pressure of the high-pressure fluid.

Meanwhile, as shown in FIG. 8 , a supply space 170 ′ through which the fluid passing through the filter 720 ′ moves is provided inside the upper body 110 ′.

The supply space 170' is smaller than the first supply region 171' larger than the diameter L1 of the side surface portion 722' and the width L1' of the side surface portion 722'. It is divided into a second supply area 172'.

The width L2' along the diameter of the first supply region 171' is larger than the width L1' along the diameter of the second side part 722', so that the high-pressure fluid moves the side part 722'. It is smoothly moved to the first supply region 171 ′ through the Accordingly, the difference between the pressure of the inner portion 720a' of the filter 720' and the pressure of the first supply region 171', that is, the generation of a differential pressure is reduced.

The second supply region 172 ′ is formed to be spaced apart from the cap portion 723 ′. That is, since the second supply region 172 ′ is spaced apart from the filter 720 ′ and the width of the second supply region 172 ′ becomes smaller than the width of the side portion 722 ′, the second supply region 172' increases the moving speed of the high-pressure fluid without affecting the generation of differential pressure between the first supply region 171' and the side portion 722', thereby increasing the responsiveness of the high-pressure regulator for hydrogen can

In addition, a contact surface 712 ′ in contact with the inner surface of the upper body 100 ′ is formed on the outer surface of the housing 710 ′. An O-ring 740' is provided on the contact surface 712' to prevent leakage of high-pressure fluid.

The O-ring 740' is made of an ethylene propylene rubber (EPDM) material. However, the O-ring 740 ′ is not limited to being made of only ethylene propylene rubber, and may be made of various materials that maintain durability under high pressure.

The O-ring 740' includes a first O-ring 741', a second O-ring 742' that is spaced apart from the first O-ring 741' and is larger than a diameter of the first O-ring 741', and the A third O-ring 743 ′ is disposed to be spaced apart from the second O-ring 742 ′ and has a smaller diameter than the second O-ring 742 ′.

The first O-ring 741 ′ primarily blocks foreign substances from being introduced, and the second O-ring 742 ′ blocks foreign substances that have passed through the first O-ring 741 ′ from being introduced.

In addition, the third O-ring 743' primarily blocks the high-pressure fluid from leaking to the outside, and the second O-ring 742' allows the high-pressure fluid that has passed through the third O-ring 743' to leak to the outside. block it from being

A diameter of the first O-ring 741 ′ is the same as a diameter of the third O-ring 743 ′. Also, according to various embodiments of the present disclosure, a diameter of the first O-ring 741 ′ may be different from a diameter of the third O-ring 743 ′.

The second O-ring 742 ′ is disposed between the first O-ring 741 ′ and the third O-ring 743 ′. The second O-ring 742 ′ may be disposed between the first O-ring 741 ′ and the third O-ring 743 ′ to minimize contact with the high-pressure fluid. That is, when the high-pressure fluid is hydrogen, the second O-ring 742 ′ minimizes contact with the hydrogen, so that the breakage of the second O-ring 742 ′ by hydrogen is reduced.

In addition, a screw thread 791 ′ disposed to be spaced apart from the contact surface 712 ′ is formed on the outer surface of the housing 710 ′. In addition, a screw tab corresponding to the screw thread 791' is formed on the inner surface of the upper body 100'.

When the screw thread 791' is screwed to the screw tab, the inlet port 700' is fixed to the upper body 100'.

In addition, a hexagonal bolt 780 ′ spaced apart from the screw thread 791 ′ is formed on the outer surface of the housing 710 ′. The hexagon bolt 780' is provided so that a user can conveniently rotate the inlet port 700' using a tool, so that the inlet port 700' is screwed to the upper body 100'.

In addition, the other side of the housing 710' is connected to a supply pipe (not shown) through which the high-pressure fluid is moved, and the other side of the housing 710' has an O-ring 750' for preventing leakage of the high-pressure fluid from the supply pipe. provided

As described above, the preferred embodiments according to the present invention have been described, and the fact that the present invention can be embodied in other specific forms without departing from the spirit or scope of the present invention in addition to the above-described embodiments is understood by those of ordinary skill in the art. It is obvious to them. Therefore, the above-described embodiments are to be regarded as illustrative rather than restrictive, and accordingly, the present invention is not limited to the above description, but may be modified within the scope of the appended claims and their equivalents.

100: upper body 200: piston
300: seat 320: orifice
400: valve 700: inlet port
710: housing 720: filter

Claims (14)

an upper body having an inlet port and an outlet port;
a piston provided in the upper body and mounted to be movable up and down along the axial direction of the upper body;
a sheet having an orifice formed therein; and
a valve provided to pass through the seat, the valve being mounted to be movable up and down in the axial direction so as to form the orifice for regulating the pressure of the supplied fluid; includes,
The inlet port is
a housing having an inlet passage through which a fluid is supplied; and
A high-pressure regulator for hydrogen coupled to one side of the housing and having a filter having a three-dimensional shape to have a larger filtering area than a discharge area of the inlet passage.
According to claim 1,
The filter is
a flange portion in contact with one side of the housing;
a side portion extending from the flange portion and having an inclined surface; and
A high-pressure regulator for hydrogen, extending from the side portion and having a cap portion perpendicular to the longitudinal direction of the inlet passage.
3. The method of claim 2,
The inner diameter of the side portion decreases along the direction of movement of the fluid, a high-pressure regulator for hydrogen.
3. The method of claim 2,
The inlet port, the high-pressure regulator for hydrogen, further comprising a coupling member for coupling the filter to one side of the housing.
5. The method of claim 4,
The coupling member is
a first coupling part formed in a cylindrical shape and coupled to the housing; and
Comprising a second coupling portion extending in a direction perpendicular to the longitudinal direction of the inlet passage from the first coupling portion,
The flange portion is fixed between one side of the housing and the second coupling portion, a high-pressure regulator for hydrogen.
According to claim 1,
A contact surface in contact with the inner surface of the upper body is formed on the outer surface of the inlet port,
The contact surface is provided with an O-ring to prevent leakage of fluid, a high-pressure regulator for hydrogen.
7. The method of claim 6,
The O-ring is
a first O-ring;
a second O-ring spaced apart from the first O-ring and having a larger diameter than the first O-ring; and
A high-pressure regulator for hydrogen, which is disposed to be spaced apart from the second O-ring and includes a third O-ring smaller than a diameter of the second O-ring.
7. The method of claim 6,
A thread is formed on the outer surface of the inlet port to be spaced apart from the contact surface,
A high-pressure regulator for hydrogen, in which a screw tab corresponding to the screw thread is formed on the inner surface of the upper body.
According to claim 1,
A discharge passage formed along a direction perpendicular to the axial direction is provided on the upper side of the sheet,
The pressure-reduced fluid passing through the orifice is moved to the discharge passage.
10. The method of claim 9,
the outlet port communicates with the discharge passage;
wherein the depressurized fluid is discharged through the outlet port.
3. The method of claim 2,
The upper body is provided with a step portion opposite to one side of the housing,
The flange portion is fixed between one side of the housing and the step portion, a high-pressure regulator for hydrogen.
According to claim 1,
The seat is provided to be insertable from the upper side of the upper body, a high-pressure regulator for hydrogen.
13. The method of claim 12,
A high-pressure regulator for hydrogen provided with a stopper on the upper side of the seat to prevent separation of the seat.
14. The method of claim 13,
Between the piston and the stopper, a fixing part for fixing the stopper is provided, a high-pressure regulator for hydrogen.

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