WO2024256934A1 - Clapet de non-retour et dispositif de clapet - Google Patents

Clapet de non-retour et dispositif de clapet Download PDF

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Publication number
WO2024256934A1
WO2024256934A1 PCT/IB2024/055584 IB2024055584W WO2024256934A1 WO 2024256934 A1 WO2024256934 A1 WO 2024256934A1 IB 2024055584 W IB2024055584 W IB 2024055584W WO 2024256934 A1 WO2024256934 A1 WO 2024256934A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
check valve
hydrogen
passage
filling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IB2024/055584
Other languages
English (en)
Japanese (ja)
Inventor
将太 藤井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO2024256934A1 publication Critical patent/WO2024256934A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/06—Check valves with guided rigid valve members with guided stems
    • F16K15/067—Check valves with guided rigid valve members with guided stems stem guided at two or more points
    • 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
    • F16K1/54—Arrangements for modifying the way in which the rate of flow varies during the actuation of the valve
    • 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
    • F16K15/026—Check valves with guided rigid valve members the valve being loaded by a spring the valve member being a movable body around which the medium flows when the valve is open
    • 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
    • F16K15/06—Check valves with guided rigid valve members with guided stems
    • F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/32—Hydrogen storage

Definitions

  • the present invention relates to a check valve used in a tank system filled with hydrogen, and a valve device including the check valve.
  • Fuel cells are one example of electrochemical cells.
  • One application of fuel cells is a fuel cell system that is installed in a vehicle and supplies power to the vehicle's driving motor.
  • a tank is used to store hydrogen as fuel gas.
  • Hydrogen is filled into the tank, for example, at a hydrogen station, by fitting a hydrogen supply nozzle extending from a hydrogen filling device into a receptacle for receiving hydrogen supply from the fuel cell vehicle, and supplying hydrogen toward the tank of the fuel cell vehicle.
  • a check valve is provided in the hydrogen filling path, which operates to allow hydrogen to flow only from the receptacle to the tank when the valve is open.
  • control valve or the like having an opening and closing mechanism.
  • This control valve and the valve of the filling path are integrated into a single valve device as an interface connecting the tank with the outside, which is advantageous from the standpoint of ease of installation, cost, etc. (See, for example, the valve unit in Patent Document 1.)
  • Chattering can prevent smooth hydrogen filling, generate noise, or accelerate wear at contact points, among other inconveniences.
  • the present invention has been made in light of the above-mentioned problems, and provides a check valve that does not cause chattering when filling a tank with hydrogen, and a valve device that includes the check valve.
  • the purpose of this document is to:
  • a check valve (90) used in a valve device (60) attached to a tank (20) for storing hydrogen, the check valve (90) being disposed in a filling passage (61) formed in a housing (81) of the valve device (60) and through which the hydrogen to be filled into the tank (20) passes, the check valve (90) including a valve element (84), a valve seat (82) formed in the housing (81), and a valve spring (80) for pressing the valve element (84) against the valve seat (82), the valve element (84) including a main body portion (84c) and a valve spring (80) for pressing the valve seat (82) against the valve seat (82) when the valve is closed.
  • valve portion (84a) has a projection portion (86) which is a projection protruding toward the upstream side of the filling passage (61) further than a seat portion (85) which abuts against the valve seat (82) when the valve is closed, and the check valve (90) forms an upstream throttle portion (91) between the projection portion (86) and the filling passage (61) when the check valve is open.
  • FIG. 1 is a schematic diagram for explaining an example of the overall configuration of a fuel cell system 1 in which a check valve according to the present invention is used.
  • FIG. 2 A diagram for explaining a valve device 6 ⁇ equipped with a check valve according to the present invention.
  • FIG. 7 A diagram showing the state immediately after the filling side check valve 9 ⁇ of the present invention is opened.
  • FIG. 8 A diagram showing a conventional filling side check valve 900.
  • FIG. 9 A diagram to explain the behavior of the pressure P h in the first passage 61a when chattering occurs in the conventional charging side check valve 900.
  • FIG. 10 A diagram for explaining the behavior of the pressure P h in the first passage 61 a in the filling side check valve 9 ⁇ of the present invention.
  • Fig. 1 is a schematic diagram for explaining an example of the overall configuration of a fuel cell system 1 in which a check valve according to the present invention is used.
  • the fuel cell system 1 includes a tank device 21, a fuel cell 10, an air compressor 30, an auxiliary device 40, a consumer device 50, and the like.
  • the fuel cell system 1 is, for example, a fuel cell system for a fuel cell vehicle.
  • Fuel cell 10 is, for example, a solid polymer fuel cell, and is made by stacking multiple single cells, each of which has an MEA (Membrane Electrode Assembly) sandwiched between a pair of conductive separators.
  • MEA Membrane Electrode Assembly
  • the tank device 21 includes a tank 20, which is a storage container in which hydrogen is compressed and filled, and a valve device 60.
  • the check valve according to the present invention is provided in the valve device 60.
  • Hydrogen in the tank 20 leaves the valve device 60, passes through piping 70, branch 70A, and piping 72, and is supplied to the fuel cell 10 via the auxiliary device 40.
  • piping 70, branch 70A, and piping 72 are shown in FIG. 1, a plurality of tank devices 21 may be provided.
  • a receptacle 73 for filling hydrogen into the tank apparatus 21 is provided on another pipe 71 extending from the branch 70A.
  • the receptacle 73 is a connector that is fitted with a nozzle of a hydrogen filling device when filling the tank apparatus 21 with hydrogen from a hydrogen filling device at a hydrogen station, for example.
  • the air compressor 30 takes in outside air, compresses it, and supplies it to the fuel cell 10 via the piping 74 and the auxiliary equipment 40.
  • the auxiliary device 40 includes a pressure reducing valve that reduces the pressure of hydrogen, and an injector that adjusts the amount of hydrogen supplied to the fuel cell 10.
  • the auxiliary device 40 also includes a humidifier that humidifies the air supplied from the air compressor 30 and a back pressure valve that controls the pressure.
  • the devices included in the auxiliary device 40 are not limited to these. The devices included in the auxiliary device 40 may be provided in separate locations rather than being grouped together as the auxiliary device 40.
  • the consumer device 50 is a device that operates using electricity, such as an electric motor, an electronic control device, a sensor, and an actuator.
  • the electric motor is, for example, an electric motor for driving wheels.
  • the consumer device 50 receives power directly or indirectly from the fuel cell 10.
  • FIG. 2 is a diagram illustrating a valve device 60 equipped with a check valve according to the present invention.
  • the valve device 60 has a housing 81.
  • the housing 81 has a common passage 64, a filling passage 61, and a supply passage 62 as passages through which hydrogen passes.
  • the valve device 60 has a seal portion (not shown) between the tank 20 and the valve device 60 that seals the inside and outside of the tank 20.
  • the housing 81 of the valve device 60 has an external connection portion 60A, a filling side tank connection portion 60C, and a supply side tank connection portion 60D.
  • the filling side tank connection portion 60C and the supply side tank connection portion 60D are provided at positions that open into the tank 20. That is, the filling side tank connection portion 60C and the supply side tank connection portion 60D are formed on the inside of the tank 20 with respect to the seal portion, facing the hydrogen storage area.
  • the external connection portion 60A is provided so as to open to the outside of the tank 20 across the seal portion.
  • the outer piping 7O of the tank device 21 is connected to the valve device 6O at an external connection part 60A. Inside the valve device 60, one end of a common passage 64 is connected to the external connection part 60A and the other end is connected to a branch 60B.
  • the common passage 64 branches into a filling passage 61 and a supply passage 62 at the branch 60B.
  • One end of the filling passage 61 is connected to the branch 60B, and the other end is connected to the filling-side tank connection portion 60C.
  • the filling passage 61 is provided with a filling-side check valve 90.
  • the filling-side check valve 90 is The filling side check valve 90 is a check valve that, when open, allows hydrogen to flow only from the branch 60B to the filling side tank connection part 60C.
  • supply passage 62 is connected to branch 60B, and the other end is connected to supply side tank connection part 60D.
  • Supply passage 62 is provided with, in this order from branch 60B side, a control valve 67, a supply side check valve 68, and an excess flow valve 65.
  • the control valve 67 is a solenoid valve that is configured to be switched between open and closed by turning on and off electricity.
  • the control valve 67 adjusts the amount of hydrogen supplied from the tank 20 to the fuel cell 10 in cooperation with a pressure reducing valve, an injector, etc. in the auxiliary device 40.
  • the supply side check valve 68 is a check valve that, when open, allows hydrogen to flow only from the supply side tank connection part 60D to the branch 60B side.
  • the excess flow valve 65 operates to limit the flow rate when the flow rate of hydrogen flowing from the supply tank connection part 60D to the branch 60B side exceeds a predetermined amount.
  • the excess flow valve 65 is a known valve conventionally used in the valve device 60.
  • valve device 60 when hydrogen is supplied from the tank 20 to the fuel cell 10 will be explained using Figures 1 and 2.
  • control valve 67 which is a solenoid valve
  • hydrogen in the tank 20 passes through the supply side tank connection part 60D, the excess flow prevention valve 65, the supply side check valve 68, the control valve 67, the external connection part 60A, the piping 70, and the piping 72 in that order, and is supplied to the auxiliary equipment 40.
  • the pressure of the hydrogen supplied to the auxiliary equipment 40 is adjusted by the pressure reducing valve and injector provided in the auxiliary equipment 40, and the required amount is supplied to the fuel cell 10.
  • the excess flow prevention valve 65 acts to limit the flow rate of hydrogen. Furthermore, since a check valve is provided to prevent hydrogen from flowing from branch 70A to receptacle 73, hydrogen will not flow out of receptacle 73 when hydrogen is supplied to fuel cell 10.
  • valve device 60 when hydrogen is filled into the tank 20 from a hydrogen filling device (not shown) at a hydrogen station will be described with reference to Figures 1 and 2.
  • nozzle (not shown) of the hydrogen filling device When the nozzle (not shown) of the hydrogen filling device is fitted into the receptacle 73, hydrogen in the hydrogen filling device passes through the piping 71, piping 70, external connection part 60A, filling side check valve 90, and filling side tank connection part 60C in that order, and is filled into the tank 20.
  • the valve spring of the filling side check valve 90 is set so that the pressure of the hydrogen flowing in from the receptacle 73 opens the filling side check valve 90.
  • FIG. 3 is a schematic diagram of a filling side check valve 90 according to the present invention.
  • the filling side check valve 90 is provided in a filling passage 61 formed in a housing 81 of a valve device 60.
  • the filling side check valve 90 includes a valve body 84, a valve seat 82, and a valve spring 80.
  • the housing 81 is composed of a plurality of members.
  • the housing 81 includes a first housing 81a and a second housing 81b.
  • the first housing 81a has a first passage 61a that is a part of the filling passage 61.
  • the second housing 81b has a second passage 61b that is a part of the filling passage 61.
  • the first passage 61a and the second passage 61b are formed coaxially.
  • the first passage 61a and the second passage 61b have the same inner diameter.
  • a valve seat 82 is formed at the end of the first passage 61a on the second housing 81b side, against which the seat portion of the valve body 84 seats when the filling side check valve 90 is closed.
  • a valve chamber 83 which is a stepped cylindrical space, is formed coaxially with the second passage 61b at the end of the second passage 61b on the first housing 81a side.
  • a valve body 84 is accommodated in the valve chamber 83.
  • the valve chamber 83 has, from the upstream side, a first valve chamber 83a, a second valve chamber 83b having a larger diameter than the first valve chamber 83a, and a third valve chamber 83c having a smaller diameter than the first valve chamber 83a and larger than the second passage 61b.
  • a seal member (not shown) is disposed between the first housing 81 a and the second housing 81 b to prevent hydrogen from leaking out. For this reason, when the filling side check valve 90 is open, the first passage 61 a and the second passage 61 b are air-tightly connected.
  • Fig. 4 is a front view of the valve body 84.
  • Fig. 5 is a side view of the valve body 84 shown in Fig. 4, as viewed from the direction indicated by E.
  • Fig. 6 is a cross-sectional view taken along line F-F in Fig. 4.
  • the valve element 84 includes a main body portion 84c, a valve portion 84a that seats on the valve seat 82 when the filling side check valve 90 is closed, and a large diameter portion 84b formed between the main body portion 84c and the valve portion 84a.
  • the large diameter portion 84b is formed to have a larger diameter than the main body portion 84c and the valve portion 84a.
  • Valve portion 84a has a seat portion 85 formed so as to have a smaller diameter as it proceeds toward the opposite side from large diameter portion 84. When filling side check valve 90 is closed, seat portion 85 abuts against valve seat 82. Valve portion 84a has a protrusion 86 protruding toward the opposite side from large diameter portion 84b as seen from seat portion 85. Protrusion portion 86 is formed in a cylindrical shape. Protrusion portion 86 is formed to be continuous with seat portion 85.
  • An inclined portion 87 is formed on the outer periphery of large diameter portion 84b.
  • Inclined portion 87 is formed in a shape such that the outer periphery of large diameter portion 84b is cut away.
  • Inclined portion 87 is formed so as to approach the central axis of valve body 84 as it approaches valve portion 84a.
  • three inclined portions 87 are formed at intervals of 120 degrees when viewed in the axial direction, but the number is not limited to three.
  • inclined portion 87 is formed as a flat surface, but it does not have to be a flat surface.
  • the main body 84c has an axial passage 88 and a radial passage 89, which are passages through which hydrogen passes when the filling side check valve 90 is open.
  • the axial passage 88 is formed as an axial hole including the central axis of the main body portion 84c.
  • the axial passage 88 is drilled in the axial direction from an end portion 84d of the main body portion 84c opposite to the large diameter portion 84b.
  • the axial passage 88 in this embodiment extends from the end portion 84d of the main body portion 84c to It is drilled up to near the large diameter portion 84b.
  • the radial passage 89 is formed as a radial hole that communicates between the axial passage 88 and the outer circumferential surface of the main body portion 84c.
  • the radial passage 89 is formed in four at 90 degree intervals, but the number of the radial passages 89 is not limited to four.
  • the radial passage 89 is formed near the large diameter portion 84b, but the position of the radial passage 89 is not limited to the vicinity of the large diameter portion 84b.
  • the radial passage 89 may be located at a position that opens into the second valve chamber 83b formed in the second housing 81b when the valve body 84 is disposed in the housing 81.
  • valve element 84 is accommodated in the valve chamber 83 with the valve portion 84a on the upstream side.
  • a valve spring 80 is disposed between the downstream end face 84f of the large diameter portion 84b of the valve element 84 and the downstream end face 83d of the second valve chamber 83b.
  • the valve spring 80 presses the valve element 84 in the valve closing direction with a predetermined set force.
  • the inner peripheral surface 83f of the first valve chamber 83a guides the large diameter portion 84b of the valve element 84 when the filling side check valve 90 is opened and closed.
  • the position of the valve element 84 within the housing 81 is as follows.
  • the large diameter portion 84b of the valve element 84 is located within the first valve chamber 83a.
  • the downstream end face 84f of the large diameter portion 84b is located in the vicinity of the boundary between the first valve chamber 83a and the second valve chamber 83b.
  • approximately half of the upstream area of the main body portion 84c is located within the second valve chamber 83b, and approximately half of the downstream area is located within the third valve chamber 83c.
  • the protrusion 86 is located within the first passage 61a.
  • FIG. 7 shows the state immediately after the filling side check valve 90 opens.
  • the gap between the protrusion 86 of the valve body 84 and the inner surface 61c of the first passage 61a functions as a throttle. This gap is called the upstream throttle portion 90.
  • the gap between the inclined portion 87 formed on the large diameter portion 84b of the valve body 84 and the inner circumferential surface 83f of the first valve chamber 83a also functions as a throttle. This gap is called the downstream throttle portion 92.
  • the upstream throttle portion 91 functions in a region where the stroke amount of the valve body 84 is relatively small, so that the hydrogen pressure in the first passage 61a does not drop suddenly immediately after the filling side check valve 90 opens. This prevents the filling side check valve 90 from repeatedly opening and closing after opening once, which is known as chattering.
  • the dimensions of each part are set so that the opening area of the downstream side throttle portion 92 is smaller than the opening area of the upstream side throttle portion 91. Due to this relationship, after the filling side check valve 90 opens, the pressure in the first valve chamber 83a increases, so that the pressure drop in the first passage 61a becomes more gradual, which is further advantageous in avoiding chattering.
  • the stroke amount of the valve body 84 is increased,
  • the downstream throttle portion 92 continues to function even after the upstream throttle portion 91 ceases to function, in other words, even after the protrusion 86 has come out of the first passage 61a.
  • the opening area of the downstream throttle portion 92 increases as the stroke of the valve element 84 increases, and the throttle characteristic becomes gentler. This characteristic makes the hydrogen pressure rise in the first valve chamber 83a even more gentle, which is further advantageous in avoiding chattering.
  • Fig. 8 is a diagram showing a conventional filling side check valve 900 as a comparative example.
  • the configuration of the conventional filling side check valve 900 will be described with reference to Fig. 8.
  • the differences from the filling side check valve 900 according to the present invention will be mainly described, and the same parts as the filling side check valve 900 according to the present invention will not be described.
  • the conventional filling side check valve 900 when the valve is closed, the valve element 840 is pressed in the closing direction by the set force of the valve spring 80 and the hydrogen pressure on the second passage 61b side.
  • the hydrogen pressure in the first passage 61a rises and presses the valve element 840 in the opening direction. Then, when the pressing force in the opening direction exceeds the pressing force in the closing direction, the filling side check valve 900 opens.
  • valve body 840 of the conventional filling side check valve 900 a protrusion 86 is not formed on the valve portion 840a, and an inclined portion 87 is not formed on the large diameter portion 840b.
  • the inner diameter portion of the valve chamber 830 formed by the first housing 810a and the second housing 810b in the housing 810 is formed to have a larger gap than the present invention relative to the outer diameter portion of the large diameter portion 840 of the valve body 840.
  • an upstream side throttle portion 91 and a downstream side throttle portion 92 are not formed when the valve is open.
  • the filling-side check valve 900 does not include the upstream throttle section 91 and the downstream throttle section 92, the pressure in the first passage 61a drops rapidly after the filling-side check valve 900 opens. In other words, the difference between P h and P 1 rapidly decreases. Then, the value obtained by multiplying the difference between P h and P 1 by A ph falls below the set force F s of the valve spring 8 ⁇ , and the filling-side check valve 900 closes.
  • Fig. 9 is a diagram for explaining the behavior of the pressure P h in the first passage 61a when chattering occurs in the conventional filling side check valve 900.
  • the horizontal axis represents time
  • the vertical axis represents the pressure P h in the first passage 61a
  • time 0 represents the time when hydrogen supply from the receptacle 73 side begins.
  • the solid line in Fig. 9 shows the behavior of the pressure P h in the first passage 61a when chattering occurs in the conventional filling side check valve 900.
  • P1 in Fig. 9 represents the hydrogen pressure in the receptacle 73.
  • the behavior of the filling side check valve 90 according to the present invention when it is opened will be described.
  • the filling side check valve 90 according to the present invention similar to the conventional filling side check valve 900, when hydrogen is supplied from the receptacle 73 side, the pressure of the hydrogen in the first passage 61 a causes the valve element 84 to leave the valve seat 82.
  • the upstream side throttle section 91 and the downstream side throttle section 92 function after the valve is opened, so that a rapid drop in pressure in the first passage 61a does not occur, as compared with the conventional filling side check valve 900.
  • the closing condition of the filling side check valve 90 at this time is (Ph - Pl) x Apc ⁇ Fs, since the pressure in the second valve chamber 83b is P1.
  • Apc is the axial projected area of the large diameter portion 84 of the valve body 84, in other words, the area of the downstream end face 84 of the large diameter portion 84b.
  • f is the projected area in the axial direction.
  • Fig. 10 is a diagram for explaining the behavior of the pressure P h in the first passage 61a in the filling side check valve 9O according to the present invention.
  • the horizontal axis indicates time
  • the vertical axis indicates the pressure P h in the first passage 61a
  • the time O indicates the time when hydrogen supply from the receptacle 73 side starts.
  • the solid line in Fig. 1O indicates the behavior of the pressure P h in the first passage 61a in the filling side check valve 9O according to the present invention.
  • the filling side check valve 90 of the present invention prevents chattering from occurring when hydrogen is filled into the tank device 21 at a hydrogen station.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

La présente invention élimine la survenue d'un broutement dans un clapet de non-retour. Un clapet de non-retour 90 est utilisé dans un dispositif de clapet 60 fixé à un réservoir 20 destiné à stocker de l'hydrogène. Le clapet de non-retour 90 est disposé dans un passage de remplissage 61 qui est formé dans un logement 81 du dispositif de clapet 60 et qui permet à l'hydrogène introduit dans le réservoir 20 de le traverser. Le clapet de non-retour 90 comprend un corps de clapet 84, un siège de clapet 82 formé dans le logement 81, et un ressort de clapet 80 destiné à presser le corps de clapet 84 vers le siège de clapet 82. Le corps de clapet 84 comprend une partie corps 84c, une partie clapet 84a située sur le siège de clapet 82 à la fermeture du clapet, et une partie de grand diamètre 84b qui est formée entre la partie corps 84c et la partie clapet 84a et qui présente un diamètre extérieur plus grand que celui de la partie corps 84c. La partie clapet 84a présente une section de saillie 86 qui est une saillie faisant saillie vers le côté amont du passage de remplissage 61 par rapport à une partie siège 85 venant en butée sur le siège de clapet 82 à la fermeture du clapet, et forme une section d'étranglement côté amont 91 entre la section de saillie 86 et le passage de remplissage 61 à l'ouverture du clapet.
PCT/IB2024/055584 2023-06-15 2024-06-07 Clapet de non-retour et dispositif de clapet Ceased WO2024256934A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2023098560 2023-06-15
JP2023-098560 2023-06-15

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WO2024256934A1 true WO2024256934A1 (fr) 2024-12-19

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2838805A1 (fr) * 2002-04-18 2003-10-24 Senior Ermeto S A S Robinet a remplissage controle pour bouteille de gaz sous pression
US9228667B2 (en) * 2011-04-29 2016-01-05 Robert Bosch Gmbh Pressure-limiting valve
WO2023037303A1 (fr) * 2021-09-10 2023-03-16 Omb Saleri S.P.A.- Società Benefit Clapet antiretour pour un système automobile à pile à combustible

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2838805A1 (fr) * 2002-04-18 2003-10-24 Senior Ermeto S A S Robinet a remplissage controle pour bouteille de gaz sous pression
US9228667B2 (en) * 2011-04-29 2016-01-05 Robert Bosch Gmbh Pressure-limiting valve
WO2023037303A1 (fr) * 2021-09-10 2023-03-16 Omb Saleri S.P.A.- Società Benefit Clapet antiretour pour un système automobile à pile à combustible

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