WO2006112491A1 - 流体用開閉弁装置 - Google Patents
流体用開閉弁装置 Download PDFInfo
- Publication number
- WO2006112491A1 WO2006112491A1 PCT/JP2006/308258 JP2006308258W WO2006112491A1 WO 2006112491 A1 WO2006112491 A1 WO 2006112491A1 JP 2006308258 W JP2006308258 W JP 2006308258W WO 2006112491 A1 WO2006112491 A1 WO 2006112491A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve
- fluid
- valve seat
- seal portion
- seal
- Prior art date
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 107
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 40
- 235000019589 hardness Nutrition 0.000 claims description 31
- 239000002737 fuel gas Substances 0.000 claims description 22
- 229920001971 elastomer Polymers 0.000 claims description 15
- 239000005060 rubber Substances 0.000 claims description 15
- 238000000926 separation method Methods 0.000 claims description 15
- 229920005989 resin Polymers 0.000 claims description 13
- 239000011347 resin Substances 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 6
- 239000003345 natural gas Substances 0.000 claims description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 45
- 239000000463 material Substances 0.000 abstract description 16
- 239000007779 soft material Substances 0.000 abstract description 2
- 230000004048 modification Effects 0.000 description 30
- 238000012986 modification Methods 0.000 description 30
- 239000002861 polymer material Substances 0.000 description 9
- 239000004642 Polyimide Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000446 fuel Substances 0.000 description 5
- 229920001721 polyimide Polymers 0.000 description 5
- 239000003566 sealing material Substances 0.000 description 5
- -1 polyethylene Polymers 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 244000205754 Colocasia esculenta Species 0.000 description 1
- 235000006481 Colocasia esculenta Nutrition 0.000 description 1
- 241001274613 Corvus frugilegus Species 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- SNIOPGDIGTZGOP-UHFFFAOYSA-N Nitroglycerin Chemical compound [O-][N+](=O)OCC(O[N+]([O-])=O)CO[N+]([O-])=O SNIOPGDIGTZGOP-UHFFFAOYSA-N 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
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- 229920001194 natural rubber Polymers 0.000 description 1
- 229940073020 nitrol Drugs 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K25/00—Details relating to contact between valve members and seats
- F16K25/005—Particular materials for seats or closure elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/104—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by structure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/46—Sealings with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable packings
- F16J15/48—Sealings with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable packings influenced by the pressure within the member to be sealed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/44—Details of seats or valve members of double-seat valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/025—Check valves with guided rigid valve members the valve being loaded by a spring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K39/00—Devices for relieving the pressure on the sealing faces
- F16K39/02—Devices for relieving the pressure on the sealing faces for lift valves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7837—Direct response valves [i.e., check valve type]
- Y10T137/7866—Plural seating
- Y10T137/7867—Sequential
- Y10T137/7868—Resilient gasket
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7837—Direct response valves [i.e., check valve type]
- Y10T137/7869—Biased open
Definitions
- the present invention relates to a fluid on-off valve device for opening and closing a fluid passage.
- a method for sealing a valve portion of a high-pressure fluid in a high-pressure on-off valve device that opens and closes a high-pressure fluid passage
- a sealing material composed of any one of rubber, resin, and metal is provided on the valve body, which is a movable part, and the fluid is sealed by seating the sealing material on the valve seat part. is there. Disclosure of the invention
- the sealing performance is good, but the pressure resistance is poor.
- seal failure may occur due to an overhang phenomenon caused by excessive compression deformation of the sealing material.
- sealing material when resin and metal are used as the sealing material, it is easy to ensure pressure resistance and sealability under a high differential pressure (for example, 50 MPa or more), but a relatively low differential pressure (for example, If it is less than 50 MPa, sealing may be difficult.
- a high differential pressure for example, 50 MPa or more
- a relatively low differential pressure for example, If it is less than 50 MPa, sealing may be difficult.
- the present invention has been made in view of the above circumstances, and is a fluid opening / closing capable of obtaining good sealing performance in both a high pressure state and a low pressure state when the differential pressure between the upstream passage and the downstream passage of the fluid passage is high.
- An object is to provide a valve device.
- the fluid on-off valve device comprises: a valve seat portion;
- a fluid on-off valve device comprising: a valve body that communicates and seals; and a plurality of seal portions that selectively seal between the valve body and the valve seat portion at a plurality of locations,
- the seal portions have different hardnesses, and the seal portion that seals between the valve body and the valve seat portion has different hardness according to the differential pressure between the upstream side passage and the downstream side passage of the fluid passage. Switch to the seal part.
- the differential pressure between the upstream side passage and the downstream side passage of the fluid passage has a plurality of different hardnesses (in other words, elastic modulus, elastic modulus, and rigidity) in a predetermined high pressure state and a predetermined low pressure state.
- the seal portion may be provided only in one of the valve body and the valve seat portion, or may be provided in both the valve body and the valve seat portion.
- the direction in which the valve body separates from and contacts the valve seat portion intersects the flow direction of the fluid introduced from the upstream side passage of the fluid passage, and the plurality of seals
- the parts may be arranged in parallel to each other in a direction orthogonal to the separation / contact direction.
- valve device it is possible to reduce the size of the valve device by shortening the length in the separation / contact direction compared to the case where a plurality of seal portions are arranged in series in the separation / contact direction of the valve body.
- the valve device has the same size, it is possible to earn strokes in the connecting / disconnecting direction.
- the plurality of seal portions are such that the distance from the end face that adheres to the valve seat portion to the valve seat portion is longer as the hardness is higher and the hardness is lower. It may be as short as possible.
- the seal portion having a lower hardness comes into contact with the valve seat portion before the seal portion having a higher hardness.
- At least a seal portion having the lowest hardness among the plurality of seal portions is provided with a restoring means for providing a restoring force against compressive deformation. It may be taken.
- the seal portion having a low hardness that has been compressed and deformed earlier becomes a seal in the low pressure state. It is quickly restored to a suitable original shape and a high pressure seal pressure is secured.
- An on-off valve device for a fluid of the present invention comprises: a valve seat; and a valve body that is separated from and in contact with the valve seat and communicates and blocks the upstream passage and the downstream passage of the fluid passage.
- a fluid on-off valve device having a first seal portion that seals between the valve seat portion and a second seal portion that is harder than the first seal portion, upstream of the fluid passage
- the first seal portion is in close contact with the valve seat portion, the fluid passage is blocked, and the differential pressure is greater than or equal to the predetermined value.
- the first seal portion in close contact with the valve seat portion is compressed and deformed by the differential pressure, and the second seal portion is in close contact with the valve seat portion to seal the fluid passage.
- the seal portion in which the differential pressure between the upstream passage and the downstream passage of the fluid passage is different between the high pressure state and the low pressure state seals the fluid. That is, when the pressure difference between the upper and lower flows is less than a predetermined value, the first seal portion having a relatively low hardness is in close contact with the valve seat portion, and when the pressure difference is not less than the predetermined value, the second seal having a relatively high hardness. Is in close contact with the valve seat.
- the first seal part can be made of a soft material such as rubber (in other words, the elastic modulus / elastic modulus is small, the rigidity is small, and the hardness is small), and the second seal part is made of resin or the like.
- a material such as metal that is harder than the first seal portion in other words, a high modulus of elasticity, a large elastic modulus, a large rigidity, and a large hardness can be used.
- a part of the valve body is a second seal.
- the part may be configured.
- the first The seal part may be arranged upstream of the second seal part in the flow direction.
- the first seal portion is located on the upstream side (high pressure side), and the second seal portion is located on the downstream side (low pressure side).
- the differential pressure between the upstream and downstream changes from a low pressure state (less than a predetermined value) to a high pressure state (a predetermined value or more)
- the first seal part moves from the upstream side to the downstream side in the fluid flow direction due to the increasing differential pressure. Deforms so that it falls down and loses its sealing performance, and differential pressure acts mainly on the second seal.
- the differential pressure that actually acts on the second seal portion acts on a ring-shaped region surrounded by the outer periphery of the second seal portion and the outer periphery of the valve body in plan view of the valve body in the differential pressure acting direction. This is the differential pressure.
- the ring-shaped region is relatively wide compared to the case where the second seal portion is positioned on the radially outer side (upstream side) of the first seal portion. Therefore, the differential pressure between the upstream and downstream can be effectively applied to the second seal portion, and the sealing performance under high pressure is improved.
- the direction in which the valve body separates from and contacts the valve seat portion intersects the flow direction of the fluid introduced from the upstream side passage of the fluid passage, and the first seal The part and the second seal part may be arranged in parallel to each other in a direction perpendicular to the direction of separation of the valve body.
- the length in the contact / separation direction is shortened to reduce the size of the valve device. If the valve device is of the same size, You can earn rooks.
- the distance from the end surface of the first seal portion in close contact with the valve seat portion to the valve seat portion is such that the distance from the end surface of the second seal portion in close contact with the valve seat portion is the valve. It may be shorter than the distance to the seat.
- the first seal portion having a relatively low hardness comes into contact with the valve seat portion before the second seal portion having a relatively high hardness.
- a restoring means for applying a restoring force to the compressed and deformed first seal portion may be provided.
- the first seal portion when the differential pressure between the upstream and downstream transitions from the high pressure state (predetermined value) to the low pressure state (less than the predetermined value), the first seal portion is an original suitable for sealing in a low pressure state.
- the shape is quickly restored to the shape, and a sealing pressure higher than the specified pressure is secured.
- the valve seat portion includes a valve seat portion main body and a valve seat side seal portion that is softer than the valve seat portion main body, and the valve seat side seal portion is You may provide in the position facing a 1st seal
- the seal portion having a relatively small hardness is made of any one of rubber, resin, or metal, and the seal portion having a relatively large hardness is made of any of resin or metal. May be.
- the first seal portion may be made of any one of rubber, resin, or metal, and the second seal portion may be made of any of resin or metal.
- the fluid on-off valve device of the present invention is provided in a fluid flow path through which a high-pressure gas having a differential pressure between an upstream pressure and a downstream pressure equal to or higher than a predetermined pressure (eg, lM ⁇ a or higher) flows.
- a predetermined pressure eg, lM ⁇ a or higher
- the high-pressure gas may be a fuel gas used for generating electric energy or heat energy
- the fuel gas may be hydrogen gas or natural gas (CNG).
- the fluid on-off valve device of the present invention may be any of a check valve, an on-off valve, and a relief valve provided in the fluid flow path.
- FIG. 1 is a longitudinal sectional view of a check valve according to the first embodiment of the present invention.
- FIG. 2 is a longitudinal sectional view showing a state of the check valve at a low pressure.
- FIG. 3 is a longitudinal sectional view showing a state of the check valve at a high pressure.
- FIG. 4 is a longitudinal sectional view showing a modification of the check valve.
- FIG. 5 is a longitudinal sectional view showing a modification of the check valve.
- FIG. 6 is a longitudinal sectional view showing a modification of the check valve.
- FIG. 7 is a longitudinal sectional view showing a modification of the check valve.
- FIG. 8 is a longitudinal sectional view of a check valve according to the second embodiment of the present invention.
- FIG. 9 is a longitudinal sectional view showing a state of the check valve at a low pressure.
- FIG. 10 is a longitudinal sectional view showing a state of the check valve at a high pressure.
- FIG. 11 is a longitudinal sectional view showing a modification of the check valve.
- FIG. 12 is a longitudinal sectional view showing a modification of the check valve.
- FIG. 13 is a longitudinal sectional view of a check valve according to a third embodiment of the present invention.
- FIG. 14 is a longitudinal sectional view showing a state of the check valve at a low pressure.
- FIG. 15 is a longitudinal sectional view showing a state of the check valve at a high pressure.
- FIG. 16 is a longitudinal sectional view showing a modified example of the check valve.
- FIG. 17 is a longitudinal sectional view showing a modification of the check valve.
- FIG. 18 is a longitudinal sectional view of a check valve according to the fourth embodiment of the present invention.
- FIG. 19 is a longitudinal sectional view showing a state of the check valve at a low pressure.
- FIG. 20 is a longitudinal sectional view showing a state of the check valve at a high pressure.
- FIG. 21 is a longitudinal sectional view showing a modified example of the check valve.
- FIG. 22 is a longitudinal sectional view showing a modification of the check valve.
- FIG. 23 is a partial cross-sectional view showing a modification of the restoring means for supporting the low pressure seal portion.
- FIG. 24 is a partial cross-sectional view showing a modification of the restoring means for supporting the low pressure seal portion.
- FIG. 25 is a partial cross-sectional view showing a modification of the restoring means for supporting the low pressure seal portion.
- FIG. 26 is a partial cross-sectional view showing a modification of the restoring means for supporting the low pressure seal portion.
- FIG. 27 is a partial cross-sectional view showing a modification of the restoring means for supporting the low pressure seal portion.
- FIG. 1 shows, for example, a valve provided in a high-pressure fluid flow path, and a check valve (fluid on-off valve device) 1 A that allows fluid flow in one direction but prohibits flow in the other direction.
- the check valve 1 A is formed by disposing a valve body assembly (valve body) 3 A in fluid passages 7 and 8 formed in the valve body 2.
- the valve body assembly 3A is a fluid flow from the high pressure side fluid passage (upstream side passage) 7 that is upstream in the fluid flow direction to the low pressure side fluid passage (downstream side passage) 8 that is downstream in the fluid flow direction. Is to stop.
- valve seat body 4 On the low pressure side of the pulp body 2, a valve seat body (valve seat portion) 4 is formed which forms a seal in cooperation with the valve body assembly 3A. Also in pulp body 2 The panel 5 is provided with a restoring force in a direction away from the valve seat body 4 to the valve body assembly 3A. On the center side of the valve seat body 4, a protrusion 6 is formed that surrounds the opening edge of the low-pressure side fluid passage 8 and protrudes toward the valve body assembly 3 A side. These valve seat body 4 and protrusion 6 constitute a valve seat portion.
- the valve assembly 3A is formed by fixing a low pressure seal portion (first seal portion) 12 and a high pressure seal portion (second seal portion) 13 to a valve body 10 having an H-shaped cross section.
- the seal portions 12 and 13 are made of a polymer material, and the low-pressure seal portion 12 is made of a softer material than the high-pressure seal portion 13, that is, a material having a relatively low hardness. Specifically, rubber can be used for the low pressure seal portion 12, and a resin having a relatively high hardness can be used for the high pressure seal portion 13.
- the high-pressure seal portion 13 is fixed in a state where it is accommodated in the recess 10 a formed on the lower surface of the valve body 10, in other words, the surface facing the valve seat body 4, and protrudes toward the valve seat body 4. Sealing is performed when the end face 1 3 a of the ring-shaped part that contacts the valve seat body 4 contacts.
- the low-pressure seal portion 1 2 is completely accommodated in the region surrounded by the end face 1 3 a of the high-pressure seal portion 1 3 a, that is, in the recess portion 1 3 b formed in the central portion of the high-pressure seal portion 1 3. It is fixed to the high pressure seal part 13.
- the end surface of the low-pressure seal portion 12 (the surface facing the valve seat body 4 side) 1 2 a comes into contact with the projection 6 to perform sealing.
- the end face 1 2 a of the low-pressure seal section 1 2 is located on the inner side of the valve body 1 0 in the axial direction (valve opening / closing direction, valve body separating / connecting direction) than the end face 1 3 a of the high-pressure seal section 1 3.
- the difference in height along the valve opening / closing direction between the end faces 1 2 a and 1 3 a is set to be smaller than the protruding height of the protruding part 6 along the valve opening direction.
- the valve assembly 3 A further moves in the valve closing direction ⁇ , and the low-pressure seal 12 is pressed against the projection 6 to Even when contracted and deformed, if the amount of deformation is up to a predetermined amount, the end face 13 a of the high-pressure seal portion 13 does not contact the valve seat body 4 as shown in FIG.
- the contact timing of the end surface 12 a with respect to the protrusion 6 is different from the contact timing of the end surface 13 a with respect to the valve seat body 4.
- the distance from the end surface 12a of the low-pressure seal portion 12 2 with relatively low hardness to the protrusion 6 is the same as the distance from the end surface 13a of the high-pressure seal portion 13 with relatively high hardness to the valve seat body. Shorter than 4 distance.
- valve closing direction load acts on the valve body 10
- the valve body assembly 3 A moves to the valve seat body 4 side against the restoring force of the panel 5.
- FIG. 2 shows a case where the pressure difference between the high pressure side fluid passage 7 and the low pressure side fluid passage 8 is relatively small at low pressure.
- the differential pressure at this time is, for example, not less than I M Pa and less than 50 M Pa.
- the soft low-pressure seal portion 12 is brought into close contact with the projection portion 6 so that sealing is performed.
- the hard high pressure seal part 1 3 and the valve seat body 4 are not in contact with each other.
- FIG. 3 shows a case where the pressure difference between the high pressure side fluid passage 7 and the low pressure side fluid passage 8 is relatively large at high pressure.
- the differential pressure at this time is, for example, 5 OMPa or more.
- the low pressure seal portion 1 2 is in close contact with the projection 6 at low pressure, and the high pressure seal portion 1 3 is the valve seat body 4 at high pressure. And close.
- the material of the low pressure seal part 1 2 is deformed under high pressure.
- the sealing performance is reduced, and the material of the high-pressure seal part 13 cannot be sufficiently sealed at low pressures.
- the low-pressure seal part 12 is sealed under a low pressure. In the lower part, since the high-pressure seal part 13 is used for the sealing, good sealing performance can be obtained in both the high-pressure state and the low-pressure state of the differential pressure between the upstream and the downstream.
- the low-pressure seal portion and the high-pressure seal portion are made of a material having a low hardness, a size, and a material, respectively, and in particular, like the above example, each is made of a polymer material.
- the same reference numerals are used for the same components as those in the above embodiment, and the description thereof is omitted. Also, redundant explanations for the effects are omitted.
- the valve body assembly 3B of the check valve 1B shown in FIG. 4 includes a valve body 16 formed of the same material as the high-pressure seal portion 13 described above, for example, a hard polymer material such as polyimide.
- a concave seal 16 a formed at the center of the valve body 16 is fixed in a state where a soft seal portion 17 such as rubber is accommodated.
- the valve body 16 is provided with an annular protrusion 1 8 protruding toward the valve seat body 4 side along the valve opening / closing direction on the outside of the recess 16 a, and the end face 1 8 a of the protrusion 1 8 is connected to the valve seat body 4 Sealing is performed by contact.
- the low-pressure seal portion 17 is fixed at a position surrounded by the protrusion 18, and sealing is performed when the end surface 17 a contacts the valve seat body 4.
- the end surface 17a is located inside the axial direction of the valve body 16 (valve opening / closing direction, valve body separation / contact direction) than the end surface 18a.
- a part of the valve body 16, that is, the protrusion 18 is brought into contact with the valve seat body 4 in the same manner as the high-pressure seal portion 13, thereby sealing at high pressure. . Therefore, the same effect can be obtained with a smaller number of parts than in the above embodiment.
- valve seat body 4 side is not provided with the protrusion 6 (see FIG. 1), and the entire valve seat body 4 may be flat.
- the contact timing of the low pressure seal portions 17 and 12 and the high pressure seal portions 18 and 13 with respect to the valve seat body 4 can be adjusted by providing a step or an inclination in the seal portion on the valve body side.
- the valve assembly 3 is opposite to the configuration of the check valve 1 A in FIG.
- the end face 17 of the low-pressure seal part 1 7 in B constitutes the high-pressure seal part.
- the end face 18 of the protrusion 1 8 protrudes further to the valve seat body 4 side than the 8 a. After sealing with the part 1 2, it is sealed with the protrusion 1 8 forming the high pressure seal part.
- the check valve 1D shown in FIG. 6 may be used.
- the valve assembly 3 D of the check valve 1 D includes a ring-shaped low pressure seal portion 20 and a high pressure seal portion 21 positioned radially outside the low pressure seal portion 20 in the valve body 19. It is fixed in a state of being accommodated in an annular recess 19 a provided.
- the seal portions 20 and 21 are formed of the same polymer material as that of the seal portions 12 and 13 and have the same functions and effects.
- the check valve 1 E shown in FIG. 7 may be used.
- This check valve 1 E does not have the protrusion 6 provided in the check valve 1 A.
- the valve body assembly 3 E includes a ring-shaped low pressure seal portion 22 and a high pressure seal portion 23 positioned outside the low pressure seal portion 2 2. Part 19 is fixed in a state of being accommodated in a.
- Each seal part 2 2 and 2 3 has a cylindrical shape.
- FIG. 8 is a check valve 1 F showing a second embodiment of the present invention.
- the arrangement of the low pressure seal portion and the high pressure seal portion is the radial direction of the valve body 24 (the direction perpendicular to the valve opening / closing direction, the high pressure side fluid as compared with the check valve 1 E in FIG. The flow direction of the fluid introduced from the passage 7) is reversed.
- the valve body assembly 3 F of the check valve 1 F includes a ring-shaped low pressure seal portion 25, a high pressure seal portion 26 located radially inside the low pressure seal portion 25, and a force valve body 2. 4 is fixed in a state of being accommodated in an annular recess 2 4 a provided in 4.
- the low pressure seal portion 25 is disposed upstream of the high pressure seal portion 26 in the fluid flow direction.
- the tip portion including at least the end surface 25 a of the low pressure seal portion 25 and the tip portion including at least the end surface 26 a of the high pressure seal portion 26 are arranged in the valve opening / closing direction of the valve body assembly 3 F (valve body Are arranged in parallel to each other in a direction perpendicular to the direction of separation.
- sealing is performed as follows. That is, in the state shown in FIG. 9 where the pressure difference between the upper and lower flows is low (less than a predetermined value), sealing is performed when the end face 25 a of the low-pressure seal portion 25 contacts the valve seat body 4. . At this low pressure, the high pressure seal portion 26 and the valve seat body 4 are not in contact with each other.
- Fig. 10 which shows when the differential pressure between the upstream and downstream is high (when it is higher than the specified value), the valve body assembly 3 F is actuated by a larger valve closing direction load.
- the pressure at which the low pressure seal portion 25 tends to compress and deform due to the differential pressure is applied to the low pressure seal portion 25 because the high pressure from the high pressure side fluid passage 7 acts on the low pressure seal portion 25.
- Fig. 10 tilt inward (diameter inside); to this
- the sealing performance by the low pressure seal portion 25 is lost, but the end surface 26 a of the high pressure sealing portion 26 is in close contact with the valve seat body 4, and the sealing performance by the high pressure sealing portion 26 is ensured.
- the differential pressure that actually acts on the high-pressure seal portion 1 3 is the difference between the outer circumference of the high-pressure seal portion 26 and the valve body 2 4 in the valve body plan view in the differential pressure direction (vertical direction in FIG. It is a differential pressure acting on a ring-shaped region surrounded by the outer periphery.
- the high pressure seal portion 26 is positioned radially inward (downstream) from the high pressure seal portion 13 in the check valve 1 A of FIG.
- the ring-shaped region becomes relatively wide. Therefore, the differential pressure between the upstream and downstream can be effectively applied to the high pressure seal portion 26, and the sealing performance under high pressure conditions is improved.
- the check valve 1 can be reduced by shortening the length in the separation direction compared to the configuration in which the low pressure seal portion 25 and the high pressure seal portion 26 are arranged in series in the separation direction of the valve body assembly 3 F. F can be reduced in size, or the check valve 1 F of the same size can earn a stroke in the separating direction.
- a check valve 1 G provided with the valve body assembly 3 G shown in FIG. 11 may be used.
- the high pressure seal portion 26 is not provided, and the valve body assembly 3 G is formed of a hard polymer material such as polyimide, for example.
- the valve main body 28 includes an annular recess 28 a formed in the valve main body 28 and a soft low-pressure seal portion 25 made of rubber or the like.
- Protrusions 29 are provided.
- the protrusion 29 functions as a high-pressure seal portion, and the end surface 29 a of the protrusion 29 contacts the seat 4 to seal the high-pressure seal.
- a protrusion 6 may be provided on the valve 4 side as in the check valve 1 H shown in FIG.
- the height of the soft low pressure seal portion 25 and the hard high pressure seal portion 26 is appropriately changed by the amount of the protrusion 6 compared to the check valve 1 F, and these low pressures
- the contact timing of the high pressure seals 25 and 26 may be adjusted.
- FIG. 13 is a check valve 1 I showing a third embodiment of the present invention.
- the check valve 1 I includes a soft valve seat side low pressure seal portion 30 fixed to the valve seat body 4, and the valve seat side low pressure seal portion 30 constitutes a valve seat portion together with the valve seat body 4. .
- the valve seat side low pressure seal portion 30 may be made of a material different from or the same type as the low pressure seal portion 25 as long as it is softer than the valve seat body 4. For example, polyimide or the like is adopted.
- the valve seat side low pressure seal part 30 has a ring shape and is provided at a position facing the low pressure seal part 25.
- the valve body assembly 3 I has the same configuration as the valve body assembly 3 F shown in FIG. 8, for example, but the heights of the low pressure seal portion 25 and the high pressure seal portion 26 are low and low as described later. It is adjusted appropriately so that sealing is performed properly at high pressure.
- sealing is performed as follows. In other words, in the state shown in FIG. 14 where the differential pressure between the up and down flows is low (less than a predetermined value), the end face 25a of the low pressure seal 25 is in contact with the valve seat side low pressure seal 30. As a result, the seal is performed. The high pressure seal portion 26 and the valve seat body 4 do not contact at low pressure. On the other hand, in the state shown in Fig. 15 where the differential pressure between the upstream and downstream is high (when it is above the specified value), the valve body assembly 3 I has increased due to a larger valve closing load.
- the low-pressure seal 25 and the valve seat-side low-pressure seal 30 will be bent inward (downstream) in the radial direction and the seal function will be lost. Therefore, as in the embodiment shown in FIG. 8 and the like, the differential pressure between the upstream and downstream can be effectively applied to the high-pressure seal portion 26, and the sealing performance under high-pressure conditions is improved.
- valve seat side low-pressure seal part 30 since the valve seat side low-pressure seal part 30 is provided in the present embodiment, the following effects are also obtained. That is, when the valve seat side low pressure seal portion 30 is not provided, the low pressure seal portion 25 slides with respect to the valve seat body 4 every time the opening / closing operation is performed, so that the low pressure seal portion 25 In contrast to the possibility of accelerated wear, in the present embodiment, the low pressure seal portion 25 contacts only the valve seat side low pressure seal portion 30 and does not contact the valve seat body 4 directly. Wear of the low-pressure seal portion 25 is suppressed, and durability can be improved.
- a protrusion 6 may be provided on the valve seat body 4 as in the check valve 1 J shown in FIG.
- the heights of the low pressure seal part 25 and the high pressure seal part 26 are appropriately changed as compared with the check valve 1 I in FIG. What is necessary is just to adjust the contact timing of 5 and 26.
- a check valve 1 K including the valve body assembly 3 K shown in FIG. 17 may be used. In the modified example of the figure, as with the check valve 1 G of FIG. 11, the valve body assembly 3 K and a separate high-pressure seal portion 26 (FIG. 16) are not provided.
- the valve body assembly 3 K is composed of a valve body 3 2 made of a hard polymer material such as polyimide, and an annular recess 3 formed in the valve body 3 2. 2 is constituted by a low pressure seal portion 25 made of rubber or the like fixed inside.
- the central portion (part) of the surface of the valve body 3 2 facing the valve seat body 4 in the radial direction is protruded toward the valve seat body 4 3 3.
- the protrusion 33 functions as a high-pressure seal portion, and the end surface 33a of the protrusion 33 contacts the valve seat body 4 to perform sealing at high pressure.
- FIG. 18 is a check valve 1 L shown as the fourth embodiment of the present invention.
- the valve assembly 3 L of the check valve 1 L is provided inside the annular recess 3 5 a provided in the valve body 3 5, inside the low pressure seal portion 3 6 and the low pressure seal portion 3 6 in the radial direction.
- the resulting high pressure seal portion 37 is fixed.
- the low-pressure seal portion 36 includes a cylindrical portion 36 a that hangs down from the concave portion 35 a and a flange portion 36 b that extends substantially horizontally inward from the lower edge of the cylindrical portion 36 a.
- the coil spring 3 8 (restoring means) force that supports the flange portion 3 6 b is provided inside the low pressure seal portion 3 6 with one end supported by the valve body 3 5 and the other end supported by the flange portion 3 6 b. ing.
- a plurality of coil springs 38 are provided in the circumferential direction of the check valve 1 L at appropriate intervals (two are shown in FIG. 18).
- sealing is performed as follows. In other words, in the state shown in Fig. 19 where the differential pressure between the upper and lower flow is low (less than the specified value), the lower surface of the flange 3 6 b of the low pressure seal 3 6 is in contact with the valve seat body 4 The seal is performed by. At this low pressure, the high pressure seal portion 37 and the valve seat body 4 do not contact each other.
- the low pressure seal portion 36 When the differential pressure drops from the high pressure state of Fig. 20 and transitions to the low pressure state, the low pressure seal portion 36 immediately returns to the original state of Fig. 19 due to the repulsive force of the coil spring 38. Restore.
- the coil panel 3 8 when the high pressure state is shifted to the low pressure state, the restoration of the low pressure seal portion 36 is delayed due to a tapering phenomenon or the like, or the valve seat body 4
- the sealing performance in the low pressure state may be deteriorated due to the wear of the low pressure seal portion 36 due to repeated sliding against the low pressure state.
- the low pressure seal portion is provided by the coil panel 38. 3 6 can be restored quickly and reliably so as to press the valve seat body 4 at a predetermined pressure or higher, and a good sealing property can be secured.
- the check valve 1 M shown in FIG. 21 may be used.
- This check valve 1 M valve body assembly 3 M includes, for example, a valve body 40 formed of a hard polymer material such as polyimide, and an annular recess 40 0 a formed in the valve body 40 a. Further, the low pressure seal portion 36 and the coil panel 38 are fixed.
- the central part (part) of the surface of the valve body 40 facing the valve seat body 4 is provided with a protrusion 41 in which the central part (part) of the valve body 40 faces the valve seat body 4 direction. It has been.
- the protrusion 41 functions as a high-pressure seal portion, and sealing is performed when the end surface 41 a of the protrusion 41 comes into contact with the valve seat body 4.
- a protrusion 6 may be provided on the valve seat body 4 as in the check valve 1 N shown in FIG.
- the low pressure seal 3 6 and the height of the high-pressure seal portion 37 can be changed as appropriate, and the contact timing of these low-pressure and high-pressure seal portions 36, 37 can be adjusted.
- FIGS. 23 to 25 show modified examples using the panel panel 45.
- the plate panel 45 is provided on the radially inner side of the low-pressure seal portion 36.
- the proximal end of the plate panel 45 is inserted and fixed to the valve body 35.
- the distal end is the flange portion 36.
- b is elastically supported.
- FIG. 24 shows a modification using a leaf spring 46 inserted into the low pressure seal portion 36.
- the plate panel 46 is inserted and fixed to the valve body 35 at the base end side, and is inserted into the cylindrical portion 36 a and the flange portion 36 b to elastically support the entire low pressure seal portion 36. is doing.
- FIG. 25 shows a modification using a plate panel 47 that supports the low-pressure seal portion 36 from the outside.
- the base end of the plate panel 47 is fixed while being sandwiched between the valve body 35 and the low pressure seal portion 36, and the tip is fixed to the low pressure seal portion 36.
- FIG. 2 5 plate panel 4 5 shown in, 4 6, 4 also in the seventh variation of, like the Koirupane 3 8, promptly original from a state where the low-pressure seal portion 3 6 is compressed and deformed inwardly Restoring force can be given to return to the state.
- FIG. 26 shows a modification in which rubber 48 provided inside the low pressure seal portion 36 is used in place of the coil panel 38.
- the rubber 48 is in a ring shape and is provided around the axis of the valve body 35, and has a circular cross-sectional shape.
- the cross-sectional shape may be rectangular.
- any restoring means for applying a restoring force to the low-pressure seal portion 36 may be used as long as it is an elastic body.
- the panel 5 is not necessarily provided.
- a main stop valve, a pressure regulating valve, or the like may be used as long as it is a fluid on-off valve device.
- a fuel cell vehicle that drives a running motor with the generated power (electric energy) of a fuel cell that generates electricity by an electrochemical reaction between fuel gas and oxidizing gas, or burning natural gas (CNG) in an internal combustion engine
- high-pressure fluid high-pressure gas
- fuel consumption devices fuel cells and internal combustion engines
- natural gas vehicles that use thermal energy to obtain driving force for driving
- the fuel gas from the fuel gas supply source to the fuel gas consuming device is disposed inside the fuel gas supply source such as a fuel gas tank or in a fluid flow channel (fuel gas flow channel) between the fuel gas supply source and the fuel gas consuming device.
- Main stop valve main valve or on / off valve for controlling the presence or absence of supply
- one or more check valves to prevent backflow of fuel gas in the fuel gas flow path
- fuel gas in the fuel gas flow path Flow
- One or more overflow prevention valves to prevent abnormal rise of fuel
- one or more relief valves to prevent abnormal rise of fuel gas pressure in the fuel gas flow path
- fuel gas consumption from fuel gas supply source One or a plurality of pressure regulating valves for regulating the fuel gas supply pressure to the apparatus to a predetermined pressure (reducing pressure) are provided, and the present invention can also be applied to these valves.
- the material of the low-pressure seal part and the high-pressure seal part is a soft and hard polymer material, respectively.
- the material is not limited to this as long as it is a soft and hard material.
- the low-pressure seal part for example, natural rubber can be used in addition to synthetic rubbers such as polybutadiene, butadiene- taro nitrol, and black-prene.
- high-pressure seals include thermoplastic resins such as polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), and polystyrene (PS), phenolic resin (PF), and epoxy resin (EP).
- thermosetting resins such as alkyd resins, for example, metals may be used.
- Each seal portion may be provided only on one of the valve body and the valve seat portion, or may be provided on both the valve body and the valve seat portion.
- the differential pressure between the upstream passage and the downstream passage of the fluid passage is selectively selected by the plurality of seal portions having different hardnesses in a predetermined high pressure state and a predetermined low pressure state. It is possible to perform sealing between the valve seat portions. Further, according to the present invention, when the differential pressure between the upstream side passage and the downstream side passage of the fluid passage is less than a predetermined value (at the time of low pressure), the first seal portion is in close contact with the valve seat portion and exceeds the predetermined value. Since the second seal part is in close contact with the valve seat part at the time of high pressure (high pressure), the pressure difference between the upstream and downstream can be adjusted in both the high pressure state and the low pressure state by appropriately selecting the material of each seal part. This makes it possible to obtain a good sealing property.
- the present invention can be widely used for the on-off valve device for fluids having such requirements.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Architecture (AREA)
- Fluid Mechanics (AREA)
- Check Valves (AREA)
- Lift Valve (AREA)
- Details Of Valves (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020077023312A KR100909454B1 (ko) | 2005-04-14 | 2006-04-13 | 유체용 개폐밸브장치 |
CN2006800124525A CN101160485B (zh) | 2005-04-14 | 2006-04-13 | 流体用开关阀装置 |
CA 2603735 CA2603735C (en) | 2005-04-14 | 2006-04-13 | Fluid on-off valve device |
EP06732116.6A EP1870620B1 (en) | 2005-04-14 | 2006-04-13 | On-off valve device for fluid |
US11/887,727 US8186377B2 (en) | 2005-04-14 | 2006-04-13 | Fluid on-off valve device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2005117597A JP4654747B2 (ja) | 2005-04-14 | 2005-04-14 | 流体用開閉弁装置 |
JP2005-117597 | 2005-04-14 |
Publications (1)
Publication Number | Publication Date |
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WO2006112491A1 true WO2006112491A1 (ja) | 2006-10-26 |
Family
ID=37115201
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2006/308258 WO2006112491A1 (ja) | 2005-04-14 | 2006-04-13 | 流体用開閉弁装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US8186377B2 (ja) |
EP (1) | EP1870620B1 (ja) |
JP (1) | JP4654747B2 (ja) |
KR (1) | KR100909454B1 (ja) |
CN (1) | CN101160485B (ja) |
CA (1) | CA2603735C (ja) |
WO (1) | WO2006112491A1 (ja) |
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US6708951B2 (en) * | 2002-01-17 | 2004-03-23 | Westinghouse Air Brake Technologies Corporation | Annular sealing device having a positive stop means for use in a valve member |
JP2004204947A (ja) | 2002-12-25 | 2004-07-22 | Kitz Corp | ボールバルブ |
JP2004204946A (ja) | 2002-12-25 | 2004-07-22 | Kitz Corp | トラニオン型ボールバルブ |
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2005
- 2005-04-14 JP JP2005117597A patent/JP4654747B2/ja not_active Expired - Fee Related
-
2006
- 2006-04-13 CA CA 2603735 patent/CA2603735C/en not_active Expired - Fee Related
- 2006-04-13 KR KR1020077023312A patent/KR100909454B1/ko not_active IP Right Cessation
- 2006-04-13 US US11/887,727 patent/US8186377B2/en not_active Expired - Fee Related
- 2006-04-13 EP EP06732116.6A patent/EP1870620B1/en not_active Expired - Fee Related
- 2006-04-13 CN CN2006800124525A patent/CN101160485B/zh not_active Expired - Fee Related
- 2006-04-13 WO PCT/JP2006/308258 patent/WO2006112491A1/ja active Search and Examination
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009281510A (ja) * | 2008-05-22 | 2009-12-03 | Jtekt Corp | 弁装置 |
JP2013535621A (ja) * | 2010-07-05 | 2013-09-12 | ウェー、アービン | 高圧力コネクタ |
Also Published As
Publication number | Publication date |
---|---|
KR100909454B1 (ko) | 2009-07-28 |
KR20070110933A (ko) | 2007-11-20 |
CN101160485A (zh) | 2008-04-09 |
EP1870620A1 (en) | 2007-12-26 |
CA2603735C (en) | 2010-11-23 |
US8186377B2 (en) | 2012-05-29 |
US20090267014A1 (en) | 2009-10-29 |
EP1870620A4 (en) | 2009-04-29 |
CA2603735A1 (en) | 2006-10-26 |
JP2006292152A (ja) | 2006-10-26 |
JP4654747B2 (ja) | 2011-03-23 |
EP1870620B1 (en) | 2017-01-04 |
CN101160485B (zh) | 2010-07-07 |
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