JP6969933B2 - Valve device - Google Patents

Description

The present invention relates to a valve device.

Conventionally, there is a pressure reducing valve (regulator) for adjusting the pressure of high-pressure hydrogen gas or the like used in a fuel cell vehicle (for example, Patent Document 1). In such a pressure reducing valve, a valve mechanism (opening / closing valve) is provided between the primary port and the secondary port in the body, and the valve body of the valve mechanism contacts the valve seat according to the pressure on the secondary port side. By separating them, the opening amount (opening) changes. As a result, the high-pressure hydrogen gas flowing in from the primary port is depressurized so that the pressure of the hydrogen gas sent out from the secondary port does not exceed a predetermined pressure.

Japanese Unexamined Patent Publication No. 2006-185103 (Fig. 1, etc.)

By the way, for example, in the pressure reducing valve of Patent Document 1, an annular bottom body (support member) is fixed in a gas flow path in which a bottomed cylindrical valve body is housed, and the gas flowing in from the primary port is discharged. The gas flows into the space (valve chamber) in which the valve body is accommodated in the gas flow path through the through hole formed in the center of the bottom body. Therefore, a force (propulsive force) that pushes toward the valve seat is likely to be applied to the valve body by the flow of gas flowing in through the through hole, and a large load may be applied when the valve body is seated on the valve seat. be.

It should be noted that such a problem may occur not only in a pressure reducing valve that sends out decompressed gas from the valve mechanism, but also in a valve device such as a check valve that stops the outflow of gas by the valve mechanism.
An object of the present invention is to provide a valve device capable of suppressing an excessive load from acting on a valve seat.

The valve device for solving the above problems is accommodated in a body in which a gas flow path is formed, a valve seat provided in the middle of the gas flow path, and an upstream side of the valve seat in the gas flow path. The valve body includes a valve body that can be brought into contact with and detached from the valve seat, and a support member that is provided on the upstream side of the valve body and defines a retracted position of the valve body. The valve body has a valve hole of the valve seat. It has a head that can be closed and a guide portion that guides the movement of the valve body along the axial direction, and the guide portion is a flow that allows gas to flow between the guide portion and the inner peripheral surface of the gas flow path. A flow path forming portion that forms a space and a sliding contact portion that is in sliding contact with the inner peripheral surface of the gas flow path are formed side by side in the circumferential direction, and the support member has an upstream side and a downstream side of the support member. A plurality of through holes are formed, and at least one of the plurality of through holes is such that the center of the opening on the downstream side in the through hole is the center of the through hole in a state where the valve body is in an arbitrary phase around the axis. It was formed so as to be included in the area where the flow space is projected in the axial direction.

According to the above configuration, when the valve body is in an arbitrary phase around the axis, the center of the opening on the downstream side in at least one of the through holes is included in the region where the flow space is projected in the axial direction. The gas flowing in through the through hole easily flows into the distribution space. That is, compared to the case where a through hole is formed in the center of the support member, for example, a force (propulsion) that pushes the valve body toward the valve seat by hitting the sliding contact portion of the valve body among the gas flowing through each through hole. At the same time as the flow rate of the gas that easily acts as a force) decreases, the flow rate of the gas that flows directly into the flow space and does not easily act as a propulsive force on the valve body increases. Therefore, as a whole, the propulsive force generated by the flow of gas flowing into the valve body through each through hole is reduced as compared with the conventional case, and it is possible to suppress the action of a large load when the valve body is seated on the valve seat. ..

In the valve device, the number of through holes is preferably larger than the number of flow spaces.
According to the above configuration, with the valve body in any phase around the axis, the configuration in which the center of the downstream opening in at least one of the through holes is included in the region where the flow space is projected axially is easily configured. realizable.

In the valve device, a urging member provided between the valve body and the support member and urging the valve body to the valve seat side is provided, and the guide portion is a part of the urging member. It is formed in a cylindrical shape that can be accommodated, and the opening on the downstream side in each of the through holes is formed so as to be located radially outside the circle formed by the inner peripheral surface of the guide portion in the axial direction. Is preferable.

According to the above configuration, it is possible to suppress the gas flowing in through each through hole from flowing into the inside of the guide portion formed in a cylindrical shape, so that the propulsive force generated by the gas flow is further reduced.
In the valve device, it is preferable that the opening on the downstream side in each of the through holes is formed so as to face both a part of the valve body and the peripheral edge portion of the gas flow path in the body in the axial direction.

According to the above configuration, the gas flowing in through the through hole facing the flow space in the axial direction is suitably flowed into the flow space, so that the propulsive force generated by the gas flow is further reduced. ..

In the valve device, the guide portion is formed with a plurality of the flow path forming portions having the same circumferential width and a plurality of sliding contact portions having the same circumferential width, and the plurality of flow path forming portions are formed. And the plurality of sliding contact portions are preferably provided alternately side by side in the circumferential direction.

According to the above configuration, since the guide portion has a symmetrical shape around the axis, it is possible to prevent, for example, the valve body from being pressed against the inner peripheral surface of the gas flow path due to the imbalance of the pressure of the gas flowing in the distribution space. ..

In the valve device, the gas flow path connects the primary port and the secondary port of the body, and presses the valve body in a direction away from the valve seat according to the pressure of the secondary port. It is preferable to provide a pressing mechanism.

According to the above configuration, the valve device is configured as a pressure reducing valve for reducing the pressure of the gas sent to the secondary port by changing the opening amount (opening) of the valve seat by the pressing mechanism. In such a pressure reducing valve, the valve body repeatedly seats on the valve seat according to the pressure on the secondary port side, so that a large load acts from the valve body to the valve seat by forming through holes as in each of the above configurations. The effect of suppressing the doing is great.

According to the present invention, it is possible to suppress an excessive load from acting on the valve seat.

Sectional drawing of a pressure reducing valve. Enlarged sectional view around the valve mechanism. Perspective view of the valve body and the support member. (A) and (b) are schematic cross-sectional views showing the arrangement of through holes with respect to the valve body in this embodiment (FIG. 2 IV-IV cross-sectional view). The schematic diagram which shows the flow of hydrogen gas on the upstream side of a valve body. Schematic cross-sectional view showing the arrangement of the through hole with respect to the valve body in another example. Schematic cross-sectional view showing the arrangement of the through hole with respect to the valve body in another example.

Hereinafter, an embodiment in which the valve device is embodied as a pressure reducing valve will be described with reference to the drawings.
The pressure reducing valve (regulator) 1 shown in FIG. 1 is provided in the middle of a fluid circuit connecting a hydrogen gas gas tank 2 mounted on a fuel cell vehicle and a fuel cell 3, and can emit high-pressure (for example, about 80 MPa maximum) hydrogen gas. The fuel cell is depressurized (for example, about 1 MPa) and sent to the fuel cell 3 side. The pressure reducing valve 1 includes a body 6 in which the primary port 4 and the secondary port 5 are formed, a valve mechanism 7 provided between the primary port 4 and the secondary port 5 in the body 6, and an opening of the valve mechanism 7. It is provided with a pressing mechanism 8 for adjusting the amount (opening degree).

The body 6 is formed with a round hole-shaped accommodating hole 11 that communicates with the primary port 4 and the secondary port 5 and is open to the outside. The supply flow path 12 as a gas flow path extending from the primary port 4 opens in the center of the bottom surface of the accommodation hole 11, and the delivery flow path 13 as a gas flow path extending to the secondary port 5 is the bottom surface and the inner circumference of the accommodation hole 11. It is open at the intersection with the surface. The supply flow path 12 is connected to the gas tank 2 via a joint 14 attached to the primary port 4, and the delivery flow path 13 is connected to the fuel cell 3 via a joint 15 attached to the secondary port 5. ..

As shown in FIG. 2, the supply flow path 12 is formed in a straight line with a circular cross section, and the primary port 4 is coaxially formed in the opening portion on the upstream side (lower side in FIG. 1). Has been done. The first and second mounting portions 16 and 17 are formed in order from the upstream side in the opening portion on the downstream side (upper side in FIG. 1) in the supply flow path 12. Specifically, the inner diameters of the first and second mounting portions 16 and 17 increase in this order, and the first and second mounting portions 16 and 17 are formed coaxially with the accommodating holes 11, respectively.

The joint 14 screwed to the primary port 4 is formed with a joint hole 21 that penetrates coaxially with the supply flow path 12. The first and second diameter-expanded portions 22 and 23 are formed in order from the upstream side at the opening end portion on the downstream side of the joint hole 21. Specifically, the first and second enlarged diameter portions 22 and 23 have larger inner diameters in this order and are formed coaxially with the accommodating holes 11, respectively.

The valve mechanism 7 has a valve body (poppet) 31 reciprocally housed in the supply flow path 12, a valve seat 32 fixed to the first mounting portion 16, and a valve body 31 attached to the valve seat 32 side. It includes a urging member 33 to urge and a support member 34 to support the urging member 33.

As shown in FIGS. 2 and 3, the support member 34 has a columnar support portion 41 and a circular tubular flange portion 42 extending radially outward from the base end portion of the support portion 41. There is. As will be described later, the flange portion 42 is formed with a plurality of through holes 43 that open on both sides in the axial direction, that is, communicate the upstream side and the downstream side of the support member 34. The outer diameter of the flange portion 42 is set to be slightly larger than the inner diameter of the first enlarged diameter portion 22. The support member 34 is fixed to the joint 14 by being press-fitted into the first diameter-expanded portion 22 so that the flange portion 42 sandwiches the disk-shaped filter 44 provided in the first diameter-expanded portion 22. .. The joint 14 sandwiches the annular seal member 45 provided in the second enlarged diameter portion 23 with the bottom surface of the primary port 4, and the tip portion of the support portion 41 is inserted into the supply flow path 12. Is screwed into the primary port 4.

The valve body 31 protrudes from a bottomed cylindrical guide portion 51, a tapered head portion 52 whose outer diameter decreases toward the downstream side from the bottom portion of the guide portion 51, and a downstream end portion of the head portion 52. It has a columnar contact portion 53. The guide portion 51, the head portion 52, and the contact portion 53 are integrally formed coaxially. The inner diameter of the guide portion 51 is set to be slightly larger than the outer diameter of the support portion 41. Then, the valve body 31 can be moved in the axial direction along the axis L direction of the valve body 31 by the guide portion 51 in the supply flow path 12 with the tip portion of the support portion 41 inserted in the guide portion 51. It is contained.

As shown in FIGS. 3, 4 (a) and 4 (b), the outer peripheral surface of the guide portion 51 has a plurality of shapes in which a plurality of cylindrical locations (4 locations in the present embodiment) are cut out flat. The flow path forming portion 54 and the remaining plurality of sliding contact portions 55 are alternately arranged in the circumferential direction. The circumferential widths of the flow path forming portions 54 are set to be substantially equal to each other. As a result, a substantially semicircular circulation space 56 through which hydrogen gas can flow is formed between the inner peripheral surface 12a of the supply flow path 12 and the flow path forming portion 54. Each sliding contact portion 55 has a circumferential width set to be substantially equal to each other, and has a cross-sectional arc shape having a curvature slightly smaller than the inner peripheral surface 12a of the supply flow path 12. The outer peripheral surface of the guide portion 51 has the same cross section over substantially the entire axial direction thereof. Therefore, the valve body 31 is accommodated in the supply flow path 12 with a gap over the entire circumferential direction, and is rotatable around the axis L. That is, the phase (circumferential position) of the valve body 31 around the axis L may change due to its reciprocating movement or the like (see FIG. 4).

As shown in FIG. 2, a coil spring is adopted for the urging member 33. One end of the urging member 33 is installed on the support portion 41, and the other end is installed on the inner bottom surface of the guide portion 51. The urging member 33 is housed in the guide portion 51 in a compressed state, and urges the valve body 31 toward the valve seat 32. In the range in which the valve body 31 can reciprocate in the supply flow path 12, the position where the valve body 31 compresses the urging member 33 to the maximum and the movement to the upstream side is restricted by the support member 34 is the rear end position. The front end position is the position where the head 52 is seated on the valve seat 32 and the movement to the downstream side is restricted by the valve seat 32.

The valve seat 32 is formed in an annular shape having a valve hole 58, and is press-fitted so as to be coaxially arranged with the supply flow path 12 in the first mounting portion 16. The valve seat 32 is made of a hard resin that can be elastically deformed, such as a polyimide resin.

As shown in FIG. 1, the pressing mechanism 8 is fixed to the body 6 so as to cover the plug 61 attached to the second mounting portion 17, the pin 62 arranged in the plug 61, and the accommodating hole 11. It includes a cylinder 63, a piston 64 slidably housed in the cylinder 63, and a coil spring 65 arranged in a compressed state between the cylinder 63 and the piston 64.

As shown in FIG. 2, the plug 61 is formed in a columnar shape, is screwed to the inner circumference of the second mounting portion 17 while compressing the valve seat 32, and a part thereof protrudes into the accommodating hole 11. ing. At the center of the plug 61, a plug hole 71 penetrating in the axial direction is formed coaxially with the valve hole 58. Most of the plug hole 71 is formed in a cylindrical shape having a substantially constant inner diameter, and is formed in a tapered shape having a smaller diameter toward the upstream side in a portion close to the upstream side, and the valve hole 58 in the plug hole 71. The upstream part continuous with the other part has a smaller diameter than the other parts. The protruding portion 72 protruding into the accommodating hole 11 in the plug 61 is formed with a flow path hole 73 extending in the radial direction to communicate the plug hole 71 and the accommodating hole 11.

The pin 62 has a shaft-shaped portion 74 formed in a columnar shape, a downstream end portion 75 protruding downstream from the shaft-shaped portion 74, and an upstream end portion 76 protruding upstream from the shaft-shaped portion 74. ing. The outer diameter of the shaft-shaped portion 74 is set to be slightly smaller than the inner diameter of the plug hole 71, and can be moved in the axial direction within the plug hole 71. In the axial portion 74, a plurality of flow path holes 77 extending in the axial direction are formed around the axial line at equal angular intervals. The outer diameter of the downstream end portion 75 is formed in a columnar shape having a smaller diameter than that of the shaft-shaped portion 74. The outer diameter of the upstream end portion 76 is set to be substantially equal to the outer diameter of the contact portion 53 in the valve body 31, and the upstream end portion 76 and the contact portion 53 are inserted into the valve hole 58 and the plug hole 71 to each other. It is in contact.

As shown in FIG. 1, the cylinder 63 is formed in a bottomed cylindrical shape, and has a fastening portion 81 extending radially outward at its open end. The cylinder 63 is fixed by fastening the fastening portion 81 to the body 6 by bolts 82 so as to be arranged coaxially with the accommodating hole 11. A sealing member 83 such as an O-ring is sandwiched between the body 6 and the fastening portion 81.

The piston 64 is formed in a bottomed cylindrical shape, and its outer diameter is set to be slightly smaller than the inner diameter of the cylinder 63. The piston 64 is slidably accommodated in the cylinder 63 in a posture in which the bottom thereof is located on the open end side of the cylinder 63, and the inside of the cylinder 63 is divided into a pressure reducing chamber 84 and a pressure adjusting chamber 85. A seal member 86 such as an O-ring is mounted on the outer periphery of the piston 64 to ensure airtightness between the pressure reducing chamber 84 and the pressure adjusting chamber 85. The piston 64 is in contact with the downstream end portion 75 of the pin 62. As a result, the pin 62 and the valve body 31 move integrally according to the sliding of the piston 64.

The coil spring 65 is housed in a compressed state between the cylinder 63 and the piston 64. Then, the coil spring 65 urges the piston 64 so that the valve body 31 separates from the valve seat 32, that is, the opening amount of the valve mechanism 7 becomes large.

In the pressure reducing valve 1 configured as described above, the piston 64 slides in the cylinder 63 according to the differential pressure between the pressure reducing chamber 84 and the pressure adjusting chamber 85 and the urging force of the urging member 33 and the coil spring 65. Then, by adjusting the opening amount of the valve mechanism 7 according to the axial position of the piston 64, the pressure on the secondary port 5 side (pressure of the pressure adjusting chamber 85) is prevented from exceeding a predetermined pressure. The valve body 31 repeatedly sits on and off the valve seat 32 according to the supply of hydrogen gas to the fuel cell 3.

Here, the hydrogen gas supplied from the gas tank 2 through the joint 14 flows into the supply flow path 12 through the through holes 43 of the support member 34. Therefore, a part of the hydrogen gas flowing into the supply flow path 12 imparts a propulsive force for pushing the valve body 31 toward the valve seat 32. If the propulsive force generated by the hydrogen gas is increased, a large load may be applied to the valve seat 32 when the valve body 31 is seated.

Based on this point, as shown in FIGS. 4A and 4B, at least one of the plurality of through holes 43 is in a state where the valve body 31 is in an arbitrary phase (circumferential position) around the axis L. , The center of the opening on the downstream side is included in the region where the flow space 56 is projected in the axial direction, that is, the center of the opening on the downstream side in the through hole 43 is formed so as to face the flow space 56 in the axial direction. .. In FIG. 4, the center of the opening of each through hole 43 is indicated by a black circle. In other words, when the center of the downstream opening in one of the plurality of through holes 43 is axially opposed to the edge 57 connected to the sliding contact portion 55, the downstream opening in the other one of the plurality of through holes 43. The center of the space 56 is formed so as to face the distribution space 56 in the axial direction.

Specifically, eight through holes 43a to 43h are formed in the flange portion 42 of the support member 34. Each of the through holes 43a to 43h is formed in a straight line along the axis L, and has a uniform circular cross section over the entire axial direction. The openings on the downstream side of the through holes 43a to 43h shown by the two-dot chain line in FIG. 4 are located radially outside the circle C formed by the inner peripheral surface of the guide portion 51 in the axial L direction. The flange portion 42 is formed at equal intervals in the circumferential direction so as to face both the peripheral portion 6a of the supply flow path 12 in the guide portion 51 and the body 6 in the axial direction. In the present embodiment, the peripheral edge portion 6a is covered with the sealing member 45, and the opening on the downstream side of each of the through holes 43a to 43h faces the peripheral edge portion 6a in the axial direction via the sealing member 45. ..

As a result, the phase of the valve body 31 is at the position shown in FIG. 4A, for example, and the center of the opening on the downstream side of the through holes 43a, 43c, 43e, 43g is axially connected to the edge 57 connected to the sliding contact portion 55. The center of the opening on the downstream side of the through holes 43b, 43d, 43f, 43h faces the flow space 56 in the axial direction. Further, when the valve body 31 rotates around the axis L and the phase of the valve body 31 is, for example, the position shown in FIG. Facing in the axial direction. As described above, in each of the through holes 43a to 43h, the center of the opening on the downstream side in at least one of the through holes 43a to 43h faces the distribution space 56 in the axial direction in a state where the valve body 31 is in an arbitrary phase. ..

As described above, according to the present embodiment, the following effects can be obtained.
(1) Since each through hole 43 is formed in the support member 34 as described above, hydrogen gas flowing in through one of the through holes 43 is connected to the sliding contact portion 55 as shown by the thick arrow in FIG. Even when it easily hits the edge 57, the hydrogen gas flowing in through the other one of the through holes 43 easily flows into the flow space 56. That is, as compared with the case where a through hole is formed in the center of the support member 34, for example, the hydrogen gas flowing through each through hole 43 hits the end edge 57 connected to the sliding contact portion 55 of the valve body 31 to hit the valve. At the same time as the flow rate of hydrogen gas that easily acts as a propulsive force for pushing the body 31 toward the valve seat 32 decreases, the flow rate of hydrogen gas that flows directly into the flow space 56 and does not easily act as the propulsive force for the valve body increases. .. Therefore, as a whole, the propulsive force generated by the hydrogen gas flowing into the valve body 31 through each through hole 43 is reduced as compared with the conventional case, and a large load acts when the valve body 31 is seated on the valve seat 32. Can be suppressed.

(2) Since the number of through holes 43 is larger than the number of flow spaces 56, the center of the opening on the downstream side in at least one of the through holes 43 is in a state where the valve body 31 is in an arbitrary phase around the axis L. A configuration included in a region in which the distribution space 56 is projected in the axial direction can be easily realized.

(3) Since the opening on the downstream side of each through hole 43 is formed so as to be located radially outside the circle C formed by the inner peripheral surface of the guide portion 51 when viewed in the L direction of the axis, the opening is formed through each through hole 43. It is possible to suppress the inflowing hydrogen gas from flowing into the inner bottom surface side of the guide portion 51. Therefore, the propulsive force generated by the flow of hydrogen gas is further reduced.

(4) Since the opening on the downstream side of each through hole 43 is formed so as to face both the peripheral portion 6a of the supply flow path 12 in the guide portion 51 and the body 6 in the axial direction, it faces the distribution space 56 in the axial direction. The hydrogen gas flowing in through the through hole 43 is preferably flowed into the distribution space 56. Therefore, the propulsive force generated by the flow of hydrogen gas is further reduced.

(5) The circumferential widths of the flow path forming portions 54 are formed to be equal to each other, the circumferential widths of the sliding contact portions 55 are formed to be equal to each other, and the flow path forming portions 54 and the sliding contact portions 55 are formed in the circumferential direction. Since the guide portions 51 are provided alternately side by side, the guide portions 51 have a symmetrical shape around the axis L. Therefore, it is possible to prevent, for example, the valve body 31 from being pressed against the inner peripheral surface of the supply flow path 12 due to the imbalance of the pressure of the hydrogen gas flowing through the distribution space 56.

(6) In the pressure reducing valve 1, the valve body 31 repeatedly sits on the valve seat 32 according to the pressure on the secondary port 5 side. Therefore, the valve body 31 is formed by forming the through hole 43 as in each of the above configurations. The effect of suppressing a large load from acting on the valve seat 32 is great.

In addition, the above-mentioned embodiment can also be carried out in the following embodiment which changed this as appropriate.
-In the above embodiment, the cross section of each through hole 43 is formed in a circular shape, but the cross section is not limited to this, and may be a polygonal shape such as a quadrangular shape or an elliptical shape. Further, for example, each through hole 43 may be formed into a linear shape inclined with respect to the axis L, and the shape thereof can be appropriately changed.

-In the above embodiment, the guide portion 51 is formed in the shape of a bottomed cylinder, but the present invention is not limited to this, and the guide portion 51 may be formed in a solid columnar shape, for example. In this case, the urging member 33 can be stably held by forming the support portion inserted into the inner circumference of the urging member 33 in the valve body 31.

In the above embodiment, the flow path forming portion 54 is formed in a planar shape, but the present invention is not limited to this, and if the distribution space 56 can be formed between the inner peripheral surface 12a of the supply flow path 12, for example, it is formed in a curved surface shape. You may.

In the above embodiment, the circumferential widths of the flow path forming portions 54 may be formed to be different from each other, and similarly, the circumferential widths of the sliding contact portions 55 may be formed to be different from each other. Further, the number of the flow path forming portion 54 and the sliding contact portion 55 may be one each, and the number thereof can be appropriately changed.

In the above embodiment, the opening on the downstream side of each through hole 43 is formed in the flange portion 42 so as to face both the guide portion 51 and the peripheral edge portion 6a in the axial direction, but the present invention is not limited to this, and for example, FIG. As shown in, it may face only the guide portion 51 in the axial direction. In this case, in a state where the valve body 31 is in an arbitrary phase around the axis L, the center of the opening on the downstream side in at least one of the through holes 43 does not necessarily face the flow space 56 in the axial direction. Not necessary.

In the above embodiment, the opening on the downstream side of each through hole 43 is formed in the flange portion 42 so as to be located radially outside the circle C formed by the inner peripheral surface of the guide portion 51, but the present invention is not limited to this. For example, as shown in FIG. 7, a part of each opening may be located radially inside the circle C. In this case, in a state where the valve body 31 is in an arbitrary phase around the axis L, the center of the opening on the downstream side in at least one of the through holes 43 does not necessarily face the flow space 56 in the axial direction. Not necessary.

In the above embodiment, if the center of the opening on the downstream side in at least one of the through holes 43 faces the distribution space 56 in the axial direction in a state where the valve body 31 is in an arbitrary phase around the axis L, the valve body 31 is axially opposed to the flow space 56. The number (2 or more) and arrangement can be changed as appropriate. The number of through holes 43 is preferably larger than the number of flow path forming portions 54 (sliding contact portions 55) as in the above embodiment, and further, the number of flow path forming portions 54 (sliding contact portions 55). Integer multiples are preferred.

-In the above embodiment, the valve mechanism 7 may be configured not to include the urging member 33. In this case, the support member 34 does not support the urging member 33 and functions as defining the rear end position of the valve body 31.

In the above embodiment, the support member 34 sandwiches and fixes the filter 44 provided in the first diameter expansion portion 22, but the present invention is not limited to this, and the filter is provided at another position and the support member 34 fixes the filter 44. It may not be.

-In the above embodiment, the pressure reducing valve 1 is used for reducing the pressure of high-pressure hydrogen gas, but the present invention is not limited to this, and the pressure reducing valve 1 may be used for reducing the pressure of a gas other than hydrogen.
-In the above embodiment, the valve device is configured as a pressure reducing valve 1 that sends out decompressed hydrogen gas from the valve mechanism 7, but the present invention is not limited to this, for example, a check valve that stops the outflow of hydrogen gas by the valve mechanism 7. It may be used as a valve device.

Next, the technical ideas that can be grasped from the above embodiment and other examples will be added below together with their effects.
(B) The body in which the gas flow path is formed, the valve seat provided in the middle of the gas flow path, and the valve seat are housed on the upstream side of the valve seat in the gas flow path and are in contact with the valve seat. A valve body to be separated, a support member provided on the upstream side of the valve body and defining a retracted position of the valve body, and a support member provided between the valve body and the support member, the valve body is provided on the valve seat. The valve body includes a urging member for urging to the side, and the valve body has a head capable of closing the valve hole of the valve seat, and a guide portion for guiding the movement of the valve body along the axial direction. The guide portion includes a flow path forming portion that forms a flow space through which gas can flow between the guide portion and the inner peripheral surface of the gas flow path, and a sliding contact portion that is in sliding contact with the inner peripheral surface of the gas flow path. The support members are formed side by side in the circumferential direction, and the support member is formed with a plurality of through holes communicating the upstream side and the downstream side of the support member, and the guide portion can accommodate a part of the urging member. A valve device formed in a tubular shape, and the opening on the downstream side in each of the through holes is formed so as to be located radially outside the circle formed by the inner peripheral surface of the guide portion in the axial direction. According to the above configuration, it is possible to suppress the gas flowing in through each through hole from flowing into the inside of the guide portion formed in a cylindrical shape, so that the propulsive force generated by the gas is reduced.

(B) The body in which the gas flow path is formed, the valve seat provided in the middle of the gas flow path, and the valve seat are housed on the upstream side of the valve seat in the gas flow path and are in contact with the valve seat. The valve body includes a valve body to be separated and a support member provided on the upstream side of the valve body and defining a retracted position of the valve body. A guide portion for guiding the movement of the valve body along the axial direction is provided, and the guide portion forms a flow path forming a flow space through which gas can flow between the guide portion and the inner peripheral surface of the gas flow path. A portion and a sliding contact portion that is in sliding contact with the inner peripheral surface of the gas flow path are formed side by side in the circumferential direction, and the support member has a plurality of through holes that communicate the upstream side and the downstream side of the support member. Is formed, and the opening on the downstream side in each of the through holes is formed so as to face both a part of the valve body and the peripheral edge portion of the gas flow path in the body in the axial direction. According to the above configuration, the gas flowing in through the through hole facing the flow space in the axial direction is suitably flowed into the flow space, so that the propulsive force generated by the gas flow is reduced.

1 ... Pressure reducing valve, 4 ... Primary port, 5 ... Secondary port, 6 ... Body, 6a ... Peripheral part, 7 ... Valve mechanism, 8 ... Pressing mechanism, 12 ... Supply flow path (gas flow path), 12a ... Inner circumference Surface, 13 ... Delivery flow path (gas flow path), 14, 15 ... Joint, 31 ... Valve body, 32 ... Valve seat, 33 ... Basis member, 34 ... Support member, 41 ... Support part, 42 ... Flange part, 43, 43a to 43h ... Through hole, 51 ... Guide part, 52 ... Head, 53 ... Contact part, 54 ... Flow path forming part, 55 ... Sliding contact part, 56 ... Distribution space, 57 ... Edge, 58 ... Valve hole, 84 ... decompression chamber, 85 ... pressure adjustment chamber, C ... circle, L ... axis.

Claims (5)

The body on which the gas flow path is formed and
A valve seat provided in the middle of the gas flow path and
A valve body housed on the upstream side of the valve seat in the gas flow path and capable of being brought into contact with and separated from the valve seat.
A support member provided on the upstream side of the valve body and defining a retracted position of the valve body is provided.
The valve body has a head capable of closing the valve hole of the valve seat, and a guide portion for guiding the movement of the valve body along the axial direction, and the guide portion is in the gas flow path. A flow path forming portion that forms a flow space through which gas can flow between the peripheral surface and a sliding contact portion that is in sliding contact with the inner peripheral surface of the gas flow path are formed alternately in the circumferential direction.
The support member is formed with a plurality of through holes that communicate the upstream side and the downstream side of the support member.
At least one of the plurality of through holes is included in a region where the center of the opening on the downstream side in the through holes projects the flow space in the axial direction while the valve body is in an arbitrary phase around the axis. It is formed as,
A valve device in which the number of through holes is larger than the number of sliding contact portions. In the valve device according to claim 1,
A urging member provided between the valve body and the support member and urging the valve body to the valve seat side is provided.
The guide portion is formed in a tubular shape capable of accommodating a part of the urging member.
A valve device formed so that the opening on the downstream side of each through hole is located radially outside the circle formed by the inner peripheral surface of the guide portion in the axial direction. In the valve device according to claim 1 or 2.
A valve device formed so that the opening on the downstream side in each of the through holes is axially opposed to both a part of the valve body and the peripheral edge portion of the gas flow path in the body. In the valve device according to any one of claims 1 to 3.
A plurality of the flow path forming portions having the same circumferential width and a plurality of the sliding contact portions having the same circumferential width are formed in the guide portion, and the plurality of flow path forming portions and the plurality of sliding portions are formed. A valve device in which the contact parts are alternately arranged in the circumferential direction. In the valve device according to any one of claims 1 to 4.
The gas flow path connects the primary port and the secondary port of the body.
A valve device provided with a pressing mechanism that presses the valve body in a direction away from the valve seat in response to the pressure of the secondary port.

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