EP4257868A1 - Ventil für einen gasbehälter mit verbessertem integriertem expander - Google Patents

Ventil für einen gasbehälter mit verbessertem integriertem expander Download PDF

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Publication number
EP4257868A1
EP4257868A1 EP23154947.8A EP23154947A EP4257868A1 EP 4257868 A1 EP4257868 A1 EP 4257868A1 EP 23154947 A EP23154947 A EP 23154947A EP 4257868 A1 EP4257868 A1 EP 4257868A1
Authority
EP
European Patent Office
Prior art keywords
valve
gas
chamber
seat
seat element
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.)
Pending
Application number
EP23154947.8A
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English (en)
French (fr)
Inventor
Philippe Rudnianyn
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.)
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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Filing date
Publication date
Application filed by Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Publication of EP4257868A1 publication Critical patent/EP4257868A1/de
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0114—Shape cylindrical with interiorly curved end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/03—Orientation
    • F17C2201/032—Orientation with substantially vertical main axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/058—Size portable (<30 l)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0153—Details of mounting arrangements
    • F17C2205/0157—Details of mounting arrangements for transport
    • F17C2205/0165—Details of mounting arrangements for transport with handgrip
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0153—Details of mounting arrangements
    • F17C2205/0188—Hanging up devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0308—Protective caps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0329—Valves manually actuated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0332—Safety valves or pressure relief valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0338—Pressure regulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0382—Constructional details of valves, regulators
    • F17C2205/0385—Constructional details of valves, regulators in blocks or units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/011—Oxygen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/014—Nitrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/016—Noble gases (Ar, Kr, Xe)
    • F17C2221/017—Helium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/031—Air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107—Single phase
    • F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/036—Very high pressure (>80 bar)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/04—Methods for emptying or filling
    • F17C2227/048—Methods for emptying or filling by maintaining residual pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/043—Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0439—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/02—Applications for medical applications
    • F17C2270/025—Breathing

Definitions

  • the invention relates to an integrated regulator valve (RDI) for a pressurized gas container, as well as a pressurized gas container, such as a medical oxygen cylinder equipped with such an RDI and its use for storing a gas or gas mixture under pressure, in particular oxygen.
  • RDI integrated regulator valve
  • An integrated regulator valve (RDI) fitted to a pressurized gas container, such as a gas cylinder, makes it possible to control not only the expansion of the pressurized gas but also the subsequent distribution of the gas at reduced pressure, i.e. tell its flow.
  • RDI integrated regulator valve
  • expansion means are integrated into the body of the valve. They are arranged on the internal gas circuit of the RDI which conveys the gas from an inlet in fluid communication with the pressurized gas container and a gas outlet carried by an outlet connector, that is to say a nozzle, or the like.
  • an outlet connector that is to say a nozzle, or the like.
  • the expansion means usually include a movable expansion valve cooperating with a valve seat to operate the expansion of the gas, that is to say to reduce its pressure level from a so-called “high” pressure or high pressure (HP) corresponding to the pressure of the gas when it is compressed in the container, up to a so-called “low” pressure or low pressure (LP) corresponding to the operating pressure, that is to say a BP pressure less than high pressure HP, for example a HP between 100 and 300 bar abs (for a full container) and a BP obtained after expansion, less than 10 bar abs.
  • HP high pressure
  • LP low pressure
  • FR-A-3002614 US-A-2008/0105309 And FR-A-2979718 which describe valves with an integrated regulator (RDI), in particular for pressurized gas containers, conforming to the preamble of claim 1.
  • RDI integrated regulator
  • a problem is therefore to propose a valve with an integrated regulator or improved RDI, i.e. making it possible to avoid the aforementioned disadvantages affecting the expansion valve and the valve seat.
  • a sealing element is arranged between the seat element and the bottom or an internal wall of the first chamber.
  • the invention further relates to a pressurized gas container comprising an integrated regulator valve (RDI) according to the invention, in particular a gas cylinder.
  • RTI integrated regulator valve
  • the gas container comprises a protective covering arranged around the RDI so as to protect it against shocks or the like.
  • the invention further relates to a use of a pressurized gas container, in particular a gas cylinder, equipped with an RDI according to the invention for storing a gas or a gas mixture chosen from oxygen, air, N 2 O /O 2 , He/O 2 , NO/nitrogen, typically oxygen.
  • a pressurized gas container in particular a gas cylinder, equipped with an RDI according to the invention for storing a gas or a gas mixture chosen from oxygen, air, N 2 O /O 2 , He/O 2 , NO/nitrogen, typically oxygen.
  • the RDI 1 comprises, as detailed below, gas expansion means 100, that is to say pressure reduction means, making it possible to carry out expansion of the gas under pressure, that is to say say a reduction in the gas pressure from a high pressure value of several tens, or even hundreds of bar abs, to a low pressure value, that is to say a relaxation pressure level.
  • the relaxation pressure level that is to say after pressure reduction, can be fixed or adjusted by means of the pressure reduction means 100, as explained below with reference to the Fig. 3 to Fig. 5 , for example of the order of a few bars (ie ⁇ 10 bar abs), for example of the order of 4.5 bar abs.
  • the valve body 2 is crossed by an internal gas circuit, that is to say one or more passages or conduits, making it possible to convey the gas, namely a high pressure gas and the expanded gas, between a fluid inlet 10 carried by an expansion or threaded end piece 3, of cylindrical or frustoconical shape, used to fix the RDI 1 on a gas bottle 50 as illustrated in Fig. 6 , and a fluid outlet 40, namely a flow outlet 11, carried by a first outlet connection 12 supplying low pressure gas (LP).
  • an internal gas circuit that is to say one or more passages or conduits, making it possible to convey the gas, namely a high pressure gas and the expanded gas, between a fluid inlet 10 carried by an expansion or threaded end piece 3, of cylindrical or frustoconical shape, used to fix the RDI 1 on a gas bottle 50 as illustrated in Fig. 6 , and a fluid outlet 40, namely a flow outlet 11, carried by a first outlet connection 12 supplying low pressure gas (LP).
  • LP low pressure
  • the threaded end 3 allows the valve body 2 to be screwed to a gas container 50, such as a gas bottle, as illustrated in Fig. 2 , containing the gas under pressure, ie at high pressure, in its pointed body 51 (partially visible) comprising an internal volume supplying the RDI 1.
  • a gas container 50 such as a gas bottle, as illustrated in Fig. 2
  • the gas under pressure ie at high pressure
  • pointed body 51 partially visible
  • the body 2 of the RDI 1 can also include another fluid outlet 13, typically a so-called pressure outlet, carried by another outlet connection 14, which supplies the non-expanded gas, that is to say at high pressure.
  • another fluid outlet 13 typically a so-called pressure outlet, carried by another outlet connection 14, which supplies the non-expanded gas, that is to say at high pressure.
  • the gas expansion means 100 also called pressure reduction means, are arranged on the internal gas circuit 15 of the body 2, between the gas inlet 10 of the RDI 1 and the gas outlet 11 at low pressure (LP ), also called flow outlet, carried by the outlet connection 12, that is to say the flow outlet connection.
  • LP low pressure
  • the outlet connectors 12, 14 are made of a metal, such as a copper alloy, in particular brass, for example an alloy of the CuZn39Pb3 type. They have general tubular shapes, i.e. elongated with axial passage for the gas communicating fluidly with the internal fluid circuit of the body 2 and opening out at the outlet orifices 11, 13.
  • the body 2 of the RDI 1 is also equipped with a pressure gauge 4 making it possible to visualize the gas pressure in the internal gas circuit 15 of the body 2, upstream of the expansion means 100 so as to reflect the residual pressure at its internal volume of the container 50 of pressurized gas.
  • the pressure gauge 4 is of the needle type, while on the Fig. 6 , the pressure gauge 4 is digital, that is to say it is an electronic device with a digital display, implementing one (or more) microprocessor associated with one or more temperature and/or pressure sensors. pressure and making it possible to determine the gas pressure, or even other quantities, such as gas autonomy or a volume of residual gas in the container 50, then to display them on the digital display.
  • the body 2 of RDI 1 also carries a flow adjustment member 5, such as a rotary wheel, cooperating with flow control means so as to allow a user to adjust the flow rate of fluid delivered by the connection 12 for distributing the fluid.
  • fluid typically flow rates of between 0 and 30 L/min, preferably between 0 and 15 L/min, or even 20 L/min.
  • the flow control means may include, for example, a disk with calibrated orifices of different dimensions, i.e. diameters, which correspond to the different selectable gas flow rates.
  • the flow adjustment member 5 is a rotating handwheel that can be manipulated by the user, which is arranged around and coaxially with the fluid distribution connector 41.
  • the rotary wheel 5 has the general shape of a graduated crown marked by flow rate indications. It includes housings offset angularly from each other and sized to allow a user to insert fingers there in order to exert a movement aimed at turning the rotary wheel 5 clockwise or counterclockwise to set the desired gas flow.
  • the outlet connector 12 carrying the gas outlet 11 at low pressure is arranged in the center of the rotating flywheel 5; however, the outlet connection 12 could be arranged elsewhere.
  • the faucet body 2 also includes other components, such as a filling connection 6, that is to say an additional connection, configured to receive a filling socket which is connected to it mechanically and fluidically in order to allow introduce fresh fluid into the internal volume of the fluid container 50 when it is empty for example.
  • This filling connection includes a filling valve preventing, under normal circumstances, the escape of fluid through this connection.
  • the filling connection is in fluid communication with the internal volume of the container 50 via the internal gas circuit 15 of the body 2 of the RDI 1 and the inlet orifice 10 carried by the threaded end piece 3.
  • the valve body 2 may also include a residual pressure mechanism (not shown) making it possible to guarantee or maintain a minimum positive pressure in the container 50 by preventing total emptying thereof, that is to say total withdrawal of the fluid, as well as a safety valve 7 including the expansion piston 122, as explained below, making it possible to evacuate any excessive pressure in the gas circuit 15 of the valve body 2, that is to say to evacuate to the atmosphere any pressure greater than a safety threshold value, for example in the event of an internal leak from the valve body 2.
  • a residual pressure mechanism (not shown) making it possible to guarantee or maintain a minimum positive pressure in the container 50 by preventing total emptying thereof, that is to say total withdrawal of the fluid, as well as a safety valve 7 including the expansion piston 122, as explained below, making it possible to evacuate any excessive pressure in the gas circuit 15 of the valve body 2, that is to say to evacuate to the atmosphere any pressure greater than a safety threshold value, for example in the event of an internal leak from the valve body 2.
  • Fig. 6 schematizes an RDI 1 according to the invention mounted on a fluid container 50 of the gas bottle type in the shape of an ogive, that is to say with a container body 51 of cylindrical shape (of axis AA) comprising an end narrowed forming a neck carrying a threaded opening communicating fluidly with the internal volume of the gas bottle.
  • the RDI 1 is fixed by screwing, via its threaded end 3, into the tapped opening in the neck of the fluid container 50.
  • the hollow cylindrical body of the container 60 comprises an internal volume used to contain the gas under pressure, that is to say at high pressure, typically a compressed medical gas, such as oxygen, at a pressure which can reach 180 to 300 bar abs, or even more (when the bottle is full).
  • the internal volume can have a capacity of 0.5 to 10 L (water equiv.), for example 2 L, 5 L or 7 L. Its diameter is of the order of 10 to 20 cm, typically of the order from 12 to 16 cm, for example approximately 14 cm.
  • a protective covering 55 comprising a rigid body, made of polymer or metal, defining a protective enclosure in which the valve body 2 of the RDI 1 is positioned (not visible) and fixed to it or to the neck of the bottle 50 by its base 56.
  • the cover 55 also comprises a carrying handle 58 surmounting the body and connected to it by support posts 59 in order to allow a user to manually lift and transport the cover/RDI/bottle assembly 55, 1, 50
  • the carrying handle 58 is located opposite the base 56 relative to the cowling body.
  • a pivoting attachment device 57 is also provided (partially visible) located here opposite the RDI 1 outlet connection 11.
  • This pivoting attachment device 57 is used to attach the cowling/cover assembly. RDI/bottle on a hospital bed or stretcher bar or any other similar support, for example rod or other.
  • the hooking device 57 can pivot, when it is unfolded by the user, between a folded position or rest position, in which it is positioned along the cowling body, as illustrated in Fig. 2 , and an unfolded position or hooking position, in which the hooking device 57 is pivoted and angularly spaced from the covering body so as to allow it to be secured or hooked to a bed bar or the like.
  • Such a pivoting attachment device 57 is described by EP-A-2918893
  • the gas under pressure is introduced into the internal volume, when filling the container 50, via the filling connection 7 and the upstream portion of the internal circuit 15 of the RDI 1 and through the neck of the container 50. Extraction gas under pressure, when drawn off, is done in the opposite direction.
  • Fig. 3 to Fig. 5 are sectional diagrams of the pressure reduction means 100 of the RDI 1 according to the invention.
  • these gas expansion means 100 are arranged on the internal gas circuit 15 passing through the body 2 of the RDI 1 and serve to reduce the pressure of the gas under pressure, that is to say a relaxation of the gas. gas, circulating in the gas circuit 15 and obtaining an expanded gas, that is to say at reduced pressure.
  • the pressurized gas passes from the high pressure (i.e. which is equivalent to the pressure in the bottle) to a preset low pressure, typically less than 10 bars abs.
  • the gas expansion means 100 arranged in the body 2 of the RDI 1 comprise a movable expansion valve 101 cooperating with a valve seat 102 to operate a gas expansion.
  • the expansion valve 101 is carried by a valve stem 111 which is normally pushed towards the valve seat 102 by a valve spring or expansion spring 106, via an actuating part 112 arranged between the valve spring 106 and the valve stem 111 carrying the expansion valve 101.
  • the valve spring 106 therefore presses on the actuating part 112 and the latter itself presses on the rear part 111b of the valve stem 111.
  • the valve spring 106 has a spring body formed by turns and of generally cylindrical shape, while the actuating part 112 comprises a tubular body which is housed in the center of the cylinder forming the body of the spring 106 and a radial shoulder at the the free end of the tubular body on which the terminal end of the body of the cylindrical spring 106 rests.
  • the terminal end of the rear part 111b of the valve stem 111 is housed in the front face of the actuating part 112.
  • the actuating part 112 and the trigger spring 106 are arranged in the internal compartment 113b of a hollow housing part 113 comprising a front bore 113a crossed by the rear part 111b of the valve stem 111
  • the housing part 113 is itself held in position by a cover part 114 which is fixed to the housing part 113 like a sleeve.
  • the cover piece 114 also forms a bottom wall making it possible to close the internal compartment 113b of the housing part 113 which houses
  • valve stem 111 and the expansion valve 101 therefore form a set of movable valve 101, 111 axially (axis XX) within a first chamber 107 or high pressure chamber of the body 2 of the RDI 1 which is supplied with gas at high pressure (HP). More precisely, the valve assembly 101, 111 is movable while being guided by a guide part 108 arranged within the first chamber 107.
  • the rear part 111b of the valve rod 111 and the expansion valve 101 are arranged in a valve chamber 118 of the guide part 108, which valve chamber 118 is open facing a seat element 104 with which the expansion valve 101 cooperates, as explained below.
  • the first chamber 107 or high pressure chamber of the body 2 of the RDI 1 is supplied by high pressure gas (HP) which enters it through an HP gas supply port 119. It communicates fluidly with a second chamber 109 or low pressure chamber (LP) of the body 2 of the RDI 1, via a connection channel 110 for the expanded gas connecting these two chambers 107, 109 comprising an inlet orifice 110a communicating fluidly with the first chamber 107 and an outlet 110b communicating fluidly with the second chamber 109.
  • HP high pressure gas
  • LP low pressure chamber
  • the first chamber 107 comprises a seat element 104, arranged in the bottom 117 of the first chamber 10 into which the inlet orifice 100a of the connecting channel 110 opens.
  • the seat element 104 is pierced with a gas passage 103 passing right through the seat element 104 which is arranged coaxially with the connecting channel 110 connecting the two chambers 107, 109.
  • the valve seat 102 is formed on the periphery 103a of the inlet port of the gas passage 103, that is to say, the valve seat 102 is circular/annular.
  • the seat element 104 is a part made of polymer material, for example a polyamide or polyimide type polymer, the polymer fibers of which are oriented axially along the axis XX.
  • polymer material for example a polyamide or polyimide type polymer, the polymer fibers of which are oriented axially along the axis XX.
  • such an orientation of the polymer fibers makes it possible to minimize the mechanical compressive stresses applying to the valve seat 102 while ensuring a maximum compression ratio.
  • the polymer part forming the seat element 104 is obtained for example by extrusion of the raw material and machining to obtain the shape.
  • the seat element 104 is a piece of revolution having here the general shape of a disc pierced in its center by the gas passage 103, ie substantially in the shape of a washer, and comprising a groove or a peripheral shoulder or the like 104c on its perimeter exterior serving to accommodate a sealing element 105, as visible on Fig. 4 and Fig. 5 .
  • the seat element 104 has for example an external diameter of between 4 and 20 mm, a thickness of between 1 and 6 mm, and an internal diameter of the gas passage 103 of between 0.5 and 5 mm.
  • the guide part 108 presses axially, via its front face 108a, on the rear face 104a of the seat element 104 to push it back into the blind bottom 117 and therefore hold it in place.
  • the front face 104b of the seat element 104 therefore rests on the blind bottom 117 and the sealing element 105, like an O-ring, is then positioned and itself held between the seat element 104 and the side wall and/or the blind bottom 117 of the first chamber 107, within the peripheral groove or the shoulder 104c or the like.
  • the rear face 108b of the guide part 108 is itself in contact with the housing part 113.
  • the housing part 113 holds the guide part 108 by pushing it axially (axis XX) towards the element of seat 104.
  • sealing means 130 such as O-rings, are provided to ensure a gas seal between the housing part 113 and the guide part 108, and between the housing part 113 and the cover part 114.
  • a front part 111a of the valve stem 111 is movable within the gas passage 103 and the connecting channel 110 so that the expansion valve 101, which is carried by the valve stem 111, can cooperate with the valve seat 102 formed on the periphery 103a of the inlet orifice of the gas passage 103 (cf. Fig. 7 ) in order to adjust the trigger, that is to say the level of trigger pressure, when the expansion valve 101 is slightly detached from the valve seat 102 or, conversely, ensure a gas seal between valve 101 and seat 102 when they are in contact with each other.
  • valve stem 111 and the seat element 104 The cooperation between the valve stem 111 and the seat element 104 is illustrated in Fig. 8 .
  • a small spacing 141 that is to say a clearance, between the external peripheral surface (ie the perimeter) of the element of seat 104 and the cylindrical internal wall of the guide part 108.
  • This spacing 141 will allow the seat element 104 to position itself well in relation to the valve 101 by offering it lateral movement when it is subjected to the force elastic of the trigger spring 106, ie the axial action (XX) of the trigger spring 106 which is directed towards the seat element 104.
  • This self-centering ensures that an optimal contact zone 140 is obtained between the valve seat 102 of here frustoconical shape and the valve seat 102 of complementary shape, as shown schematically in Fig. 8 , so as to either ensure sealing when no expansion is required or, conversely, to guarantee effective expansion of the gas.
  • the inlet of the gas passage 103 is shaped to be flared, that is to say frustoconical.
  • the expansion valve 101 must have a complementary shape to the valve seat 102 in order to ensure effective expansion or, conversely, a gas seal, when no expansion is desired. Therefore, the valve seat 102 which is formed on the periphery 103a of the inlet orifice of the gas passage 103 also has a circular shape, or even slightly frustoconical.
  • the expansion valve 101 must also have a complementary frustoconical shape in order to be able to penetrate (partially) into the gas passage 103 of the seat element 104, through the inlet of said gas passage 103, and that its external peripheral surface can cooperate with the circular, or even frustoconical, shape of the valve seat 102.
  • the trigger pressure is adjusted by a trigger adjustment system 120 comprising a trigger piston 121 comprising an active part or front shield 122 and a piston spring 123 associated with said trigger piston 121, which are arranged in the second chamber 109 arranged in the body of the RDI 1, which is open towards the outside so as to be able to insert the various elements of the trigger adjustment system 120.
  • the expansion piston 121 comprises a piston body 121a of generally cylindrical shape carrying a peripheral annular shoulder 121b extending radially on which rests the proximal end 123a of the piston spring 123 which is arranged like a sleeve around the body of cylindrical piston 121a.
  • the piston spring 123 then normally pushes the expansion piston 121 towards the connecting channel 110 opening into the second chamber 109 through which the low pressure gas (LP) passes.
  • LP low pressure gas
  • a rear cover 124 in the shape of a bell, cup or the like makes it possible to house and maintain the various elements 121-123 of the relaxation adjustment system 120 within the second chamber 109 arranged in the body 2 of the RDI 1, as visible on Fig. 5 .
  • the distal end 123b of the piston spring 123 presses against the bottom 124a of the rear cover 124.
  • the rear cover 124 further comprises a tapping 125 on its internal wall which is fixed by screwing to a complementary thread 2a provided on the body 2 of RDI 1, as shown in Fig. 5 .
  • the rear cover 124, the expansion piston 121, the piston spring 123 and the front shield 122 are arranged coaxially within the second chamber 109 and also coaxial to the expansion valve 101, to the valve rod 111, to the spring of trigger 106 and seat element 104, as shown in Fig. 4 and Fig. 5 .
  • the expansion piston 121 can be moved more or less within the second chamber 109 along the axis XX, that is to say towards or away from the channel connection 110 opening into the second chamber 109, which makes it possible to adjust the desired pressure level.
  • the front part 111a of the valve stem 111 which is movable within the gas passage 103 and the connecting channel 110, projects axially (axis XX) into the second chamber 109 and is in contact with the front shield 122 of the piston trigger 121.
  • the front shield 122 of the trigger piston 121 then cooperates with the free end 111c of the front part 111a of the valve stem 111 which projects into the second chamber 109, to push it more or less in the direction of the connecting channel 110, depending on the more or less significant screwing (ie clockwise or counterclockwise) applied to the rear cover 124, which makes it possible to adjust the level of relaxation.
  • any axial movement of the valve stem 111 generates an equal axial movement of the expansion valve 101 which is carried by the valve stem 111, therefore a separation or proportional distance of the expansion valve 101 from its valve seat 102, this which then allows a more or less significant passage of gas, therefore an adjustable relaxation of the pressure level.
  • the high pressure (HP) gas for example at approximately 180 to 200 bar abs, enters the first chamber 107 via the HP gas supply port 119, as illustrated in Fig. 5 , then into the valve chamber 118 via one (or more) inlet channel 118a which puts the first chamber 107 in fluid communication with the valve chamber 118, according to the gas path shown schematically by arrows F on Fig. 5 .
  • the HP gas then undergoes expansion while passing between expansion valve 101 and valve seat 102, and the lower pressure gas (LP) obtained, for example at approximately 4 or 5 bar abs, then travels successively through the passage of gas 103 from the seat element 104 and the connecting channel 110 to then reach the second chamber 109, before exiting via a LP gas evacuation channel 126 which routes it to the low-pressure gas circuit pressure 127 of body 2 of RDI, as illustrated in Fig. 5 .
  • LP lower pressure gas
  • the low pressure gas circuit 127 then makes it possible to convey the LP gas to the low pressure (LP) gas outlet 11, also called flow outlet, carried by the outlet connection 12, i.e. say the flow outlet connection, visible on Fig. 1 And Fig. 6 .
  • LP low pressure
  • the rear cover 124 therefore makes it possible to adjust the preload of the piston spring 123, and therefore to adjust the expansion pressure.
  • the constraint adjustment, therefore the relaxation pressure, is carried out by adjusting the screwing stroke of the rear cover 124.
  • the bottom 124a of the rear cover 124 in the shape of a bell, cup or the like, is pierced with one or more vent orifices 129 communicating with the ambient atmosphere making it possible to evacuate gaseous excess pressures towards the exterior and therefore acts as a safety valve 7.
  • the expansion piston 122 and the expansion spring 121 serve not only to adjust the gas expansion pressure level but also as a safety valve 7 making it possible to evacuate any possible or accidental overpressure, after expansion, it is that is to say any BP greater than a desired threshold value or safety pressure.
  • seal 128, such as an O-ring, which normally ensures a gas seal between the periphery of the front shield 122 and the peripheral internal wall of the second chamber 109. This rupture of seal will allow the gas under excess pressure to pass through the system of relaxation adjustment 120 until reaching the venting orifices 129 passing through the bottom wall 124a of the rear cover 124, and thus being evacuated to the outside, that is to say the ambient atmosphere.
  • a pressurized fluid container 50 equipped with an RDI 1 according to the invention is well suited to use for storing a medical grade gas or gas mixture of the oxygen, air, N 2 O/O 2 , He/O type. 2 , NO/nitrogen, typically oxygen.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
EP23154947.8A 2022-03-10 2023-02-03 Ventil für einen gasbehälter mit verbessertem integriertem expander Pending EP4257868A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2202085A FR3133320A1 (fr) 2022-03-10 2022-03-10 Robinet pour récipient de gaz à détendeur intégré amélioré

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EP4257868A1 true EP4257868A1 (de) 2023-10-11

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1512895A1 (de) 2003-09-03 2005-03-09 Taema Integriertes Entspannungsventil mit Vorrichtung zum Sperren des Stellgliedes
US20080105309A1 (en) 2004-11-29 2008-05-08 Munetoshi Kuroyanagi Valve Device For High-Pressure Gas
FR2979718A1 (fr) 2011-09-01 2013-03-08 Hampiaux S A S Detendeur de gaz a un etage
FR3002614A1 (fr) 2013-02-26 2014-08-29 Air Liquide Detendeur de pression, robinet et bouteille munis d’un tel detendeur
EP2918893A1 (de) 2014-03-12 2015-09-16 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Schutzhaube mit schwenkbarem Einrastsystem für Gasflasche
EP3191764A1 (de) 2014-09-09 2017-07-19 Air Liquide Medical Systems Ventilblock für gaszylinder mit verbesserter nutzungssicherheit
EP3382259A1 (de) 2017-03-31 2018-10-03 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Gasabgabevorrichtung mit verbessertem kupplungssystem des betätigungsorgans
EP3643958A1 (de) 2013-09-12 2020-04-29 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Anordnung aus einer schutzverkleidung und einer gasflasche mit einer druck- oder statusanzeige im oberen bereich
EP3851733A1 (de) 2020-01-14 2021-07-21 L'AIR LIQUIDE Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Flüssigkeitsbehälter, der eine elektronische messanzeige mit verbessertem digitalen display umfasst

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1512895A1 (de) 2003-09-03 2005-03-09 Taema Integriertes Entspannungsventil mit Vorrichtung zum Sperren des Stellgliedes
US20080105309A1 (en) 2004-11-29 2008-05-08 Munetoshi Kuroyanagi Valve Device For High-Pressure Gas
FR2979718A1 (fr) 2011-09-01 2013-03-08 Hampiaux S A S Detendeur de gaz a un etage
FR3002614A1 (fr) 2013-02-26 2014-08-29 Air Liquide Detendeur de pression, robinet et bouteille munis d’un tel detendeur
EP3643958A1 (de) 2013-09-12 2020-04-29 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Anordnung aus einer schutzverkleidung und einer gasflasche mit einer druck- oder statusanzeige im oberen bereich
EP2918893A1 (de) 2014-03-12 2015-09-16 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Schutzhaube mit schwenkbarem Einrastsystem für Gasflasche
EP3191764A1 (de) 2014-09-09 2017-07-19 Air Liquide Medical Systems Ventilblock für gaszylinder mit verbesserter nutzungssicherheit
EP3382259A1 (de) 2017-03-31 2018-10-03 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Gasabgabevorrichtung mit verbessertem kupplungssystem des betätigungsorgans
EP3851733A1 (de) 2020-01-14 2021-07-21 L'AIR LIQUIDE Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Flüssigkeitsbehälter, der eine elektronische messanzeige mit verbessertem digitalen display umfasst

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