EP3974700A1 - Valve for gas container with integrated regulator provided with a safety valve - Google Patents

Valve for gas container with integrated regulator provided with a safety valve Download PDF

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Publication number
EP3974700A1
EP3974700A1 EP21187358.3A EP21187358A EP3974700A1 EP 3974700 A1 EP3974700 A1 EP 3974700A1 EP 21187358 A EP21187358 A EP 21187358A EP 3974700 A1 EP3974700 A1 EP 3974700A1
Authority
EP
European Patent Office
Prior art keywords
valve
gas
piston
expansion
spring
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
EP21187358.3A
Other languages
German (de)
French (fr)
Inventor
Maximilien BONAMARTE
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
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 Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Publication of EP3974700A1 publication Critical patent/EP3974700A1/en
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
    • F17C2201/0109—Shape cylindrical with exteriorly 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
    • F17C2205/0332—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
    • F17C2205/0352—Pipes
    • F17C2205/0364—Pipes flexible or articulated, e.g. a hose
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0388—Arrangement of valves, regulators, filters
    • F17C2205/0394—Arrangement of valves, regulators, filters in direct contact with the pressure vessel
    • 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
    • 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
    • F17C2250/03—Control means
    • F17C2250/032—Control means using computers
    • 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
    • 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
    • F17C2250/0473—Time or time periods
    • 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 a valve with an integrated regulator (RDI) equipped with a safety valve that activates in the event of overpressure that can be used on a pressurized gas container, such as a medical oxygen cylinder.
  • RDI integrated regulator
  • Low pressure expansion allows the gas to expand, i.e. to reduce its pressure, from the so-called “high” or “high pressure” pressure, i.e. the pressure that the gas has when it is compressed in the container, up to a so-called “low” or “low pressure” pressure, that is to say a working pressure lower than the high pressure.
  • the high pressure can be 250 to 300 bar abs (for a full container), while the low pressure, that is to say the pressure after expansion, is generally chosen below 10 bar abs.
  • these piston and regulating spring serving to expand the gas, are also used to fulfill a safety valve function allowing any possible or accidental overpressure to be evacuated, after expansion, i.e. say any low pressure above the desired threshold value.
  • valves with built-in regulator are given by EP-A-2770240 and WO-A-2017/194429 .
  • valve opening pressure is dependent on the rebound pressure, which itself depends on the setting of the regulating spring preload.
  • modifying the architecture of a valve with an integrated regulator or RDI is not easy because of the constraints of existing size and compactness.
  • US-A-2212626 which offers an independent assembly consisting of a gas pressure regulator equipped with a safety valve intended to be connected to a gas conduit conveying a high pressure gas.
  • the high pressure gas coming from the gas conduit enters and circulates in a channel comprising a movable pressure regulating element which causes it to undergo expansion, then enters a service chamber supplied with expanded gas.
  • the service chamber houses the valve and the pressure regulating means which act on the movable element.
  • the gas at excessive pressure escapes to the outside through the exhaust ports of the safety valve, whereas in normal operation, i.e. in the absence of overpressure, the expanded gas leaves the service chamber via a gas outlet hole passing through the wall of the service chamber.
  • Such an assembly can be easily coupled to an independent gas line but not to an RDI due to a different architecture and gas circulation within the RDIs.
  • the problem is therefore to propose a valve with an integrated regulator or improved RDI making it possible to avoid the aforementioned drawbacks linked to the piston and spring, in particular to be able to have a constant valve opening pressure and not depending on the expansion pressure. and this, without causing an increase in the size or overall bulk of the RDI.
  • the invention further relates to a pressurized gas container comprising a valve with an integrated pressure reducer according to the invention, in particular a gas cylinder.
  • the invention further relates to a use of a pressurized gas container equipped with an RDI according to the invention for storing a gas or a gaseous mixture chosen from oxygen, air, N 2 O/O 2 , He/O 2 , NO/nitrogen, typically oxygen.
  • Fig. 1 represents an embodiment of a valve with an integrated regulator 1 or RDI used for the distribution of gas according to the invention, which comprises a valve body 2 formed of brass, namely a CuZn40Pb2 alloy for example.
  • the RDI 1 comprises gas expansion means 10, 11, that is to say pressure reduction means, making it possible to operate an expansion of the pressurized gas, that is to say a reduction of the pressure of the gas from a high pressure value of several tens or even hundreds of bar abs, down to a low pressure value, that is to say an expansion pressure level.
  • the expansion pressure level that is to say after pressure reduction, can be fixed or adjusted by means of the pressure reduction means, as explained below with reference to the Fig. 3 , 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 33, that is to say one or more passages or ducts, making it possible to convey the gas, namely the high pressure gas and the expanded gas, between a fluid inlet 30 carried by a expansion or threaded tip 31, of cylindrical or frustoconical shape, and a fluid outlet 40, namely a flow outlet, carried by a first outlet connector 41.
  • an internal gas circuit 33 that is to say one or more passages or ducts, making it possible to convey the gas, namely the high pressure gas and the expanded gas, between a fluid inlet 30 carried by a expansion or threaded tip 31, of cylindrical or frustoconical shape, and a fluid outlet 40, namely a flow outlet, carried by a first outlet connector 41.
  • the threaded end piece 31 makes it possible to fix, by screwing, the valve body 2 to a gas container 60, such as a gas bottle, as illustrated in Fig. 2 , containing the gas under pressure, that is to say at high pressure, in its internal volume 61.
  • the body 2 of the RDI 1 can also comprise another fluid outlet 50, typically a so-called pressure outlet, carried by another outlet connector 51, which supplies the non-expanded gas, that is to say at high pressure.
  • another fluid outlet 50 typically a so-called pressure outlet, carried by another outlet connector 51, which supplies the non-expanded gas, that is to say at high pressure.
  • the gas expansion means 10, 11, also called pressure reduction means, are arranged on the internal gas circuit of the body 2, between the gas inlet 30 of the RDI 1 and the gas outlet 40 at low pressure, also called flow outlet, carried by the outlet connector 41, that is to say the flow outlet connector.
  • the outlet connectors 41, 51 are made of a copper alloy, in particular brass, for example, an alloy of the CuZn39Pb3 type is used. They have generally tubular shapes, ie elongated with axial passage for the gas communicating fluidly with the internal fluid circuit of the body 2 and opening out at the level of the outlet orifices 40, 50.
  • the external peripheral wall of these fittings 41, 51 comprises a or more cylindrical sections.
  • the body 2 of the RDI 1 is also equipped with a pressure gauge 70 making it possible to visualize the gas pressure in the gas circuit of the body 2, upstream of the expansion means 10, 11, which reflects that in the internal volume 61 of the container 60 of pressurized gas.
  • the pressure gauge 70 is of the needle type, whereas on the Fig. 2 , the pressure gauge 70 is digital, that is to say it is an electronic device with a digital display 71, implementing one (or more) microprocessor associated with one or more temperature sensors and/or pressure and making it possible to determine the gas pressure, or even other quantities, such as a gas autonomy or a volume of residual gas in the container 60, then to display them on the digital display 71.
  • the valve body 2 also carries a flow adjustment member 42, such as a rotary wheel, cooperating with flow control means so as to allow a user to adjust the flow of fluid delivered by the connection 41 for dispensing fluid, typically flow rates between 0 and 30 L/min, preferably between 0 and 15 L/min, or even 20 L/min.
  • the flow control means may for example comprise a disc with calibrated orifices of different dimensions, ie diameters, which correspond to the different selectable gas flow rates.
  • the flow control member 42 is a rotary wheel that can be manipulated by the user, which is arranged around and coaxially with the connector 41 for distributing the fluid.
  • the rotary flywheel has the general shape of a crown and comprises housings angularly offset from each other and sized to allow a user to insert fingers therein in order to exert a movement aimed at turning the rotary flywheel clockwise or counterclockwise to set the desired gas flow.
  • the valve body 2 may comprise other components, such as for example a filling connection (not visible), that is to say an additional connection, configured to receive a filling plug which is connected to it mechanically and fluidically in order to allow the introduction of fresh fluid into the internal volume 61 of the container 60 of fluid when it is empty for example.
  • This filling connection comprises a filling valve preventing, in normal times, the exit of fluid through this connection.
  • the filling connector is in fluid communication with the internal volume 61 of the container 60 via the internal gas circuit of the body 2 of the RDI 1 and the inlet 30 carried by the threaded end piece 31.
  • the valve body 2 may also comprise a residual pressure mechanism making it possible to guarantee or maintain a minimum positive pressure in the container by preventing a total emptying of the latter, that is to say a total withdrawal of the fluid.
  • the body 2 of the RDI 1 also comprises a safety valve 20, 21 making it possible to evacuate any excessive pressure in the gas circuit of the body 2 of the valve, downstream of the expansion means, that is to say to evacuate to the atmosphere any pressure above a safety threshold value, for example in the event of an internal valve leak.
  • FIG. 2 diagrams an RDI 1 according to the invention mounted on a fluid container 60 of the gas bottle type in the shape of an ogive, that is to say with container body 61 of cylindrical shape (with axis AA) comprising one end narrowed forming a collar carrying a threaded opening communicating fluidly with the internal volume 61 of the gas cylinder.
  • the RDI 1 is fixed by screwing, via its threaded end piece 31, into the threaded opening of the neck.
  • the hollow cylindrical body of the container 60 comprises an internal volume 61 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 200 to 300 bar abs, or even more (when the bottle is full).
  • the internal volume 61 can have a capacity of 0.5 to 10 L (equiv. in water), for example 2 L, 5 L or 7 L. Its diameter is of the order of 10 to 20 cm, typically order from 12 to 16 cm, for example about 14 cm.
  • a protective cover 80 comprising a rigid body 81, made of polymer or metal, defining a protective enclosure in which the body 2 of the valve of the RDI 1 is positioned and fixed to this one or to the neck of the bottle 60 by its base 82.
  • the rigid body 81 of the cowling 80 also comprises a carrying handle 84 surmounting the body 81 and connected to the latter by support uprights 83 in order to allow a user to manually lift and transport the cowling/RDI/bottle assembly.
  • the carrying handle 84 is located opposite the base 82 with respect to the body 81 of the cowling.
  • a pivoting hooking device 85 (partially visible) situated opposite the connector 41 of the outlet.
  • This pivoting attachment device 85 is used to attach the cover/RDI/bottle assembly to a bar of a hospital bed or stretcher or any other similar support, for example rod or other.
  • the attachment device 85 can pivot, when it is unfolded by the user, between a folded position or a rest position, in which it is positioned along the body 81 of the cowling, as illustrated in Fig. 2 , and an unfolded position or hooking position, in which the hooking device 85 is pivoted and angularly separated from the body 81 of the cowling so as to allow its stowage or hooking to a bed rail or the like.
  • Such a pivoting attachment device 85 is described by EP-A-2918893
  • the pressurized gas is introduced into the internal volume 61, when the container 60 is filled, via the filling connector and the internal circuit of the RDI 1 (not visible) and through the neck of the container 60.
  • the extraction of the gas under pressure, during racking, is in the opposite direction.
  • fittings 41, 51 may be nickel plated, i.e. that is to say covered with a nickel-based coating deposited on the brass forming the fittings 41, 51.
  • Fig. 3 is a cross-sectional diagram of the pressure reduction means and the safety valve 20, 21 of an RDI 1 according to the invention and Fig. 4 is a cross-sectional diagram of RDI 1 including the elements of Fig. 3 .
  • the RDI 1 comprises gas expansion means 10, 11, 13, 34 which are arranged on the gas circuit passing through the body 2 of the RDI 1 and which serve to operate a reduction in the pressure of the pressurized gas, that is to say an expansion of the gas, circulating in the gas circuit and obtaining an expanded gas.
  • 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 RDI 1 also comprises a safety valve 20, 21 allowing at least part of the gaseous overpressure to be evacuated to the atmosphere when the expanded gas pressure exceeds a preset threshold pressure.
  • the gas expansion means 10, 11 comprise a cylindrical expansion spring 10 acting on a movable expansion piston 11, via the valve guide, a valve stem 13 movable within a connecting passage or duct 32 coming to be fluidically connected to the internal gas circuit 33, ie one or more gas passages, and a valve seat 34 cooperating with the valve stem 13 to control the expansion of the gas within the internal gas circuit 33.
  • the valve stem 13 has an elongated shape and is movable in axial translation in the connecting duct 32, that is to say axially in the connecting duct 32.
  • the connecting duct 32 and the valve seat 34 are located in body 2 of the RDI.
  • valve stem 13 carries an expansion valve 35 cooperating with the valve seat 34.
  • valve seat 34 has a shape complementary to that of the expansion valve 35 in order to ensure, as the case may be, a seal between them. or conversely, effective expansion of the gas.
  • the valve seat 34 is located at the outlet of the connecting conduit 32 in the body 2 of the RDI, that is to say peripherally to the outlet 36 of the connecting conduit 32, namely on the side of the internal gas circuit 33.
  • the movable expansion piston 11 comprises a front part or front shield 12 which cooperates with the valve rod 13, namely with its free end 13a.
  • the expansion valve 35 separates from the valve seat 34, in particular when the valve is opened by the user, in order to operate a gas expansion and therefore to release gas which is distributed by the first outlet fitting 41 carrying the outlet orifice 40 of gas. Conversely, when the valve 1 is in the closed position, the cooperation between expansion valve 35 and valve seat 34 makes it possible to guarantee fluid tightness.
  • the movable expansion piston 11 and the safety valve 20, 21 are (at least partially) arranged in a piston/valve housing 3 arranged in the body 2 of the RDI 1, in particular in the peripheral wall of the body 2 so that the piston/valve housing 3 is open to the outside, via a wide opening 38, so as to be able to arrange therein in particular the movable expansion piston 11 and the safety valve 20, 21.
  • the conduit 32 fluidically connects the internal gas circuit 33 to the blind bottom 3A of the piston/valve housing 3, that is to say that the conduit 32 opens into the piston/valve housing 3 at an orifice of entrance 37 arranged in its blind bottom 3A.
  • a trigger adjustment bell 4 closes the piston/valve housing 3 on the outside and is fixed by screwing to the body 2 of the RDI 1, as explained below.
  • the adjustment bell 4 therefore closes the wide opening 38 of the piston/valve housing 3 like a cover.
  • the gas circulates in the internal gas circuit 33 arranged in the body 2 of the RDI 1, entering it through the pressurized gas inlet orifice 30 and emerging, after expansion, through the expanded gas outlet orifice. 40 carried by the connection 41 of the gas outlet.
  • the expansion of the gas is obtained due to the cooperation between the expansion valve 35 carried by the valve stem 13, and the valve seat 34.
  • the expanded gas comes out, in normal operation, through the first outlet connector 41 carried by the body 2 of the valve, that is to say that no gas outlet is provided from the piston housing 3 / valve outwards except in case of overpressure.
  • the gas only leaves the piston/valve housing 3 in the event of overpressure, when it is evacuated to the atmosphere by the safety valve 20, 21 via the orifices 5, as explained below.
  • the front shield 12 of the movable expansion piston 11 preferably has the shape of a disc comprises a central part 12a which cooperates with a free end 13a of the valve stem 13 and, moreover, one or more gas passage orifices 12b arranged around of the central part 12a.
  • valve rod 13 which is axially movable in the connecting duct 32, passes through the inlet 37 provided in the bottom 3A of the piston/valve housing 3 so that the free end 13a of the rod of valve 13 protrudes into the piston/valve housing 3 and can cooperate with the front shield 12 of the movable expansion piston 11.
  • the front shield 12 is integral with the trigger piston 11, for example the shield can be force-fitted into the trigger piston 11.
  • the trigger piston 11 with its front shield 12 makes it possible to exert a force on the free end 13a of the valve stem 13, in the event of depression during the opening of the RDI 1, and thus to release the gas contained in the bottle and obtain the expanded gas, after expansion.
  • Shield 12 and piston 11 are provided with ports, openings or passages 12b, 14, respectively, which allow gas to flow to valve piston 21.
  • the trigger piston 11 has a generally tubular shape with axis AA comprising an internal housing 15 comprising an internal annular shoulder 14 extending radially into the internal housing 15 and comprising a central opening 14a, that is to say forming a passage restriction.
  • the detent spring 10 presses on the annular shoulder 14 of the expansion piston 11 via a valve guide 16.
  • valve guide 16 has a generally tubular shape and comprises a central passage 19 of axis AA with a wide opening at the first end 16a of the valve guide 16 and with a narrow opening 18, i.e. say a passage restriction, at the second end 16b of the valve guide 16.
  • the first end 16a of the valve guide 16 further comprises an outer annular shoulder 17 extending radially and away from the outer peripheral surface of the valve guide 16.
  • the detent spring 10 bears against the outer annular shoulder 17 of the valve guide 16 to push it against the detent piston 11 since the outer annular shoulder 17 of the valve guide 16 bears against the annular shoulder internal annular shoulder 14 of the expansion piston 11.
  • the external annular shoulder 17 of the valve guide 16 is therefore sandwiched between the internal annular shoulder 14 of the expansion piston 11 and a free active end 10a of the expansion spring 10.
  • valve guide 16 is arranged coaxially (axis AA) and partially inserted into the internal housing of the expansion piston 11, while the expansion spring 10 of cylindrical shape is arranged around the valve guide 16, c that is to say between the outer peripheral wall of the valve guide 16 and the inner wall of the inner housing 15 of the expansion piston 11.
  • the valve guide 16, the expansion piston 11 and the expansion spring 10 are therefore arranged coaxially with each other.
  • the detent spring 10 normally pushes the mobile detent piston 11 towards the valve stem 13, which generates a displacement of the valve stem 13 in the conduit 32, which separates the detent valve 35 from the valve seat. 34, and then allows adjustment of the desired trigger pressure.
  • the valve stem 13 carrying the expansion valve 35 and the valve seat 34 arranged in the body 2 of the RDI 1 form a seat/expansion valve assembly.
  • the internal annular shoulder 14 of the expansion piston 11 comprises, on the side of the expansion spring 10 and of the valve guide 16, an annular recess 14b forming a groove in which is arranged a second fluid seal 9 .
  • the trigger adjustment bell 4 is fixed by screwing to the body 2 of the RDI 1, via an internal thread. It forms a cover closing the housing 3 of the body 2 of RDI in which are arranged the trigger spring 10, the movable trigger piston 11 and the valve guide 16, as well as the elements of the safety valve 20, 21, as explained below.
  • the trigger adjustment bell 4 has the general shape of a cup with a blind bottom 4a.
  • the blind bottom 4a comes to push the free passive end 10b of the trigger spring 10, that is to say that, in other words, the free passive end 10b of the trigger spring 10 comes to rest on the blind bottom 4a of the trigger adjustment bell 4.
  • the blind bottom 4a of the expansion adjustment bell 4 is pierced with one or more orifices 5 for the passage of gas communicating with the ambient atmosphere and making it possible to evacuate the gaseous overpressures to the outside.
  • the adjustment bell 4 makes it possible to adjust the preload of the trigger spring 10 and therefore the trigger pressure.
  • the bell 4 is screwed onto the body 2 of the RDI 1 and the stress adjustment, therefore of the trigger pressure, is carried out by varying the screwing stroke.
  • the bell 4 is pierced with holes or orifices 5 for the passage of gas which allow the evacuation of the gas to the outside in the event of the opening of the safety valve 20, 21.
  • the RDI 1 also comprises a safety valve 20, 21 comprising a cylindrical valve spring 20 acting on a movable valve piston 21 which are arranged in the housing 3 of the body 2 of the RDI 1.
  • the detent spring 10, the detent piston 11, the valve spring 20 and the valve piston 21 are arranged coaxial with axis AA and the cylindrical valve spring 20 is arranged inside the detent spring 10 cylindrical.
  • the cylindrical valve spring 20 is arranged inside the valve guide 16, which is itself arranged in the cylindrical detent spring 10, as seen in Fig. 3 and Fig. 4 .
  • the outer diameter of the cylindrical valve spring 20 is therefore smaller than the inner diameter of the cylindrical detent spring 10.
  • valve spring 20 presses on the movable valve piston 21 so as to push it normally against the second fluid seal 9 carried by the internal annular shoulder 14 of the expansion piston 11 in order to ensure a fluid seal between them.
  • the stiffness of the valve spring 20 is chosen to correspond to the safety pressure threshold, i.e. pressure-threshold, from which the safety valve 20, 21 opens, letting the excess pressure escape to the atmosphere.
  • the movable valve piston 21 has the shape of a disc 22 bordered by a skirt 23 projecting axially in the direction of the second seal 9 and pressing on it, and furthermore carrying a head or axial expansion 24 projecting axially towards the bell 4.
  • the valve spring 20 is inserted around the axial head 24 of the valve piston 21.
  • the mobile valve piston 21 In the event of gaseous overpressure greater than the thrust force of the valve spring 20, the mobile valve piston 21 will be pushed back in the direction of the bell 4 while being detached from the second seal 9, which will allow the gas in excess pressure to pass between the second seal 9 and the skirt 23 of the valve piston 21, due to the rupture of the seal thus produced, and to travel successively through the orifice 18 of the valve guide 16 and or orifices 5 of the trigger adjustment bell 4 and thus be evacuated to the outside.
  • the pressure of opening of the safety valve 20, 21 is constant and can be adjusted independently of the relief pressure since the relief pressure and the opening pressure of the safety valve are fixed by the stiffness of two different springs each having their own own stiffness, therefore elastic force.
  • the valve guide 16 makes it possible to guide the valve piston 21 and to take up the force of the valve spring 20.
  • the valve guide 16 is held against the expansion piston 11 and the seal 9, thanks to the effort exerted by the detent spring 10.
  • the valve piston makes it possible to open the safety valve 20, 21 in the event of overpressure.
  • the force exerted on the valve piston 21 by the expansion pressure exceeds the force exerted by the valve spring 20, the safety valve 20, 21 opens.
  • the valve spring 20 mounted in the valve guide 16 makes it possible to exert a constant force on the valve piston 21, and therefore to guarantee a constant opening pressure of the safety valve 20, 21.
  • the valve guide 16 is also provided with orifice(s) 18 which allow the evacuation of the gas to the outside in the event of the opening of the safety valve 20, 21.
  • Such a pressurized fluid container 60 equipped with an RDI 1 according to the invention is well suited to use for storing a gas or a gaseous mixture of medical quality of the oxygen, air, N 2 O/O 2 , He/ O 2 , NO/nitrogen, typically oxygen.

Abstract

L'invention concerne un robinet à détendeur intégré (1) ou RDI pour récipient de gaz sous pression (60) comprenant un corps de robinet (2) comprenant un circuit de gaz ; des moyens de détente de gaz (10, 11) ; et une soupape de sécurité (20, 21). Les moyens de détente de gaz (10, 11) comprennent un ressort de détente cylindrique (10) agissant sur un piston de détente mobile (11). La soupape de sécurité (20, 21) comprend un ressort de soupape cylindrique (20) agissant sur un piston de soupape mobile (21). Le ressort de détente (10), le piston de détente (11), le ressort de soupape (20) et le piston de soupape (21) sont agencés coaxiaux (AA). Le ressort de soupape cylindrique (20) est agencé dans le ressort de détente (10) cylindrique. Récipient de gaz sous pression (60) comprenant un tel robinet à détendeur intégré (1), en particulier une bouteille de gaz, et son utilisation pour stocker un gaz ou un mélange gazeux, typiquement de l'oxygène.The invention relates to a valve with integrated regulator (1) or RDI for a pressurized gas container (60) comprising a valve body (2) comprising a gas circuit; gas expansion means (10, 11); and a safety valve (20, 21). The gas expansion means (10, 11) comprise a cylindrical expansion spring (10) acting on a movable expansion piston (11). The safety valve (20, 21) comprises a cylindrical valve spring (20) acting on a movable valve piston (21). The rebound spring (10), the rebound piston (11), the valve spring (20) and the valve piston (21) are arranged coaxially (AA). The cylindrical valve spring (20) is arranged in the cylindrical detent spring (10). Pressurized gas container (60) comprising such a valve with an integrated regulator (1), in particular a gas cylinder, and its use for storing a gas or a gaseous mixture, typically oxygen.

Description

L'invention concerne un robinet à détendeur intégré (RDI) équipé d'une soupape de sécurité s'activant en cas de surpression utilisable sur un récipient de gaz sous pression, telle une bouteille d'oxygène médical.The invention relates to a valve with an integrated regulator (RDI) equipped with a safety valve that activates in the event of overpressure that can be used on a pressurized gas container, such as a medical oxygen cylinder.

Classiquement, dans un robinet à détendeur intégré (RDI) destiné à équiper un récipient de gaz sous pression, telle une bouteille de gaz, la détente dite « basse pression » est obtenue au moyen d'un piston et d'un ressort de régulation, qui permet le réglage de la pression de détente.Conventionally, in a valve with integrated regulator (RDI) intended to equip a pressurized gas container, such as a gas bottle, the so-called "low pressure" expansion is obtained by means of a piston and a regulating spring, which allows adjustment of the trigger pressure.

La détente « basse pression » permet de détendre le gaz, c'est-à-dire de réduire sa pression, depuis la pression dite « haute » ou « haute pression », à savoir la pression qu'a le gaz lorsqu'il est comprimé dans le récipient, jusqu'à une pression dite « basse » ou « basse pression », c'est-à-dire une pression d'utilisation inférieure à la haute pression. Par exemple, la haute pression peut être de 250 à 300 bar abs (pour un récipient plein), alors que la basse pression, c'est-à-dire la pression après détente, est généralement choisie inférieure à 10 bar abs."Low pressure" expansion allows the gas to expand, i.e. to reduce its pressure, from the so-called "high" or "high pressure" pressure, i.e. the pressure that the gas has when it is compressed in the container, up to a so-called “low” or “low pressure” pressure, that is to say a working pressure lower than the high pressure. For example, the high pressure can be 250 to 300 bar abs (for a full container), while the low pressure, that is to say the pressure after expansion, is generally chosen below 10 bar abs.

Dans un tel RDI classique, ces piston et ressort de régulation, servant à la détente du gaz, sont aussi utilisés pour remplir une fonction de soupape de sécurité permettant d'évacuer toute surpression éventuelle ou accidentelle, après détente, c'est-à-dire toute basse pression supérieure à la valeur-seuil désirée.In such a conventional RDI, these piston and regulating spring, serving to expand the gas, are also used to fulfill a safety valve function allowing any possible or accidental overpressure to be evacuated, after expansion, i.e. say any low pressure above the desired threshold value.

Des exemples de robinets à détendeur intégré sont donnés par EP-A-2770240 et WO-A-2017/194429 .Examples of valves with built-in regulator are given by EP-A-2770240 and WO-A-2017/194429 .

Utiliser les mêmes piston et ressort de régulation implique que la pression d'ouverture de soupape est dépendante de la pression de détente, qui elle-même dépend du réglage de la précontrainte du ressort de régulation.Using the same piston and regulating spring implies that the valve opening pressure is dependent on the rebound pressure, which itself depends on the setting of the regulating spring preload.

Or, ceci n'est pas idéal car, d'une part, la pression d'ouverture de soupape n'est pas aisément reproductible d'un robinet à l'autre et, d'autre part, une défaillance du piston et/ou du ressort de régulation entraînerait la perte de deux fonctions principales, à savoir la régulation du gaz et la libération de la surpression, et non pas uniquement d'une seule, à savoir celle de régulation.However, this is not ideal because, on the one hand, the valve opening pressure is not easily reproducible from one valve to another and, on the other hand, a failure of the piston and / or of the regulating spring would lead to the loss of two main functions, namely the regulation of the gas and the release of the overpressure, and not only of only one, namely that of regulation.

Plus généralement, modifier l'architecture d'un robinet à détendeur intégré ou RDI n'est pas aisé du fait des contraintes d'encombrement et de compacité existantes.More generally, modifying the architecture of a valve with an integrated regulator or RDI is not easy because of the constraints of existing size and compactness.

Par ailleurs, on connait US-A-2212626 qui propose un ensemble indépendant composé d'un détendeur de gaz équipé d'une soupape de sécurité destiné à venir se raccorder sur un conduit de gaz véhiculant un gaz à haute pression. Le gaz à haute pression provenant du conduit de gaz pénètre et circule dans un canal comprenant un élément mobile de régulation de pression qui lui fait subir une détente, puis pénètre ensuite dans une chambre de service alimentée en gaz détendu. La chambre de service loge la soupape et les moyens de régulation de pression qui agissent sur l'élément mobile. En cas de surpression, le gaz à pression excessive est échappé à l'extérieur par des orifices d'échappement de la soupape de sécurité, alors qu'en fonctionnement normal, c'est-à-dire en l'absence de surpression, le gaz détendu ressort de la chambre de service via un orifice de sortie de gaz traversant la paroi de la chambre de service. Un tel ensemble peut être facilement couplé à une conduite de gaz indépendante mais pas à un RDI du fait d'une architecture et d'une circulation de gaz différentes au sein des RDI.Moreover, we know US-A-2212626 which offers an independent assembly consisting of a gas pressure regulator equipped with a safety valve intended to be connected to a gas conduit conveying a high pressure gas. The high pressure gas coming from the gas conduit enters and circulates in a channel comprising a movable pressure regulating element which causes it to undergo expansion, then enters a service chamber supplied with expanded gas. The service chamber houses the valve and the pressure regulating means which act on the movable element. In the event of overpressure, the gas at excessive pressure escapes to the outside through the exhaust ports of the safety valve, whereas in normal operation, i.e. in the absence of overpressure, the expanded gas leaves the service chamber via a gas outlet hole passing through the wall of the service chamber. Such an assembly can be easily coupled to an independent gas line but not to an RDI due to a different architecture and gas circulation within the RDIs.

Le problème est dès lors de proposer un robinet à détendeur intégré ou RDI amélioré permettant d'éviter les inconvénients susmentionnés liés aux piston et ressort, en particulier de pouvoir avoir une pression d'ouverture de soupape constante et ne dépendant pas de la pression de détente et ce, sans engendrer d'augmentation de la taille ou encombrement général du RDI.The problem is therefore to propose a valve with an integrated regulator or improved RDI making it possible to avoid the aforementioned drawbacks linked to the piston and spring, in particular to be able to have a constant valve opening pressure and not depending on the expansion pressure. and this, without causing an increase in the size or overall bulk of the RDI.

La solution concerne un robinet à détendeur intégré (RDI), notamment pour récipient de gaz sous pression, telle une bouteille de gaz sous pression, comprenant un corps de robinet comprenant :

  • des moyens de détente de gaz agencés sur le circuit de gaz pour opérer une réduction de la pression du gaz sous pression, i.e. une détente du gaz sous pression, circulant dans le circuit de gaz et obtenir un gaz détendu, et
  • un circuit de gaz pour acheminer un gaz sous pression comprenant un orifice d'entrée de gaz sous pression et un orifice de sortie de gaz détendu reliés fluidiquement l'un à l'autre par le circuit interne de gaz de sorte que le gaz sous pression pénètre dans le circuit interne de gaz par l'orifice d'entrée de gaz et en ressorte par l'orifice de sortie de gaz, après avoir été détendu par des moyens de détente de gaz, lesdits moyens de détente de gaz étant agencés sur le circuit de gaz pour opérer une réduction de la pression du gaz sous pression (i.e. une détente) circulant dans le circuit de gaz et obtenir le gaz détendu, et
  • une soupape de sécurité pour évacuer une surpression gazeuse vers l'atmosphère lorsque la pression du gaz détendu excède une pression-seuil préfixée.
The solution relates to a valve with an integrated regulator (RDI), in particular for a pressurized gas container, such as a pressurized gas cylinder, comprising a valve body comprising:
  • gas expansion means arranged on the gas circuit to operate a reduction in the pressure of the pressurized gas, ie an expansion of the pressurized gas, circulating in the gas circuit and obtain an expanded gas, and
  • a gas circuit for supplying pressurized gas comprising a connected pressurized gas inlet and an expanded gas outlet fluidly to each other through the internal gas circuit so that the pressurized gas enters the internal gas circuit through the gas inlet port and leaves it through the gas outlet port, after have been expanded by gas expansion means, said gas expansion means being arranged on the gas circuit to operate a reduction in the pressure of the pressurized gas (ie an expansion) circulating in the gas circuit and obtain the gas relaxed, and
  • a safety valve to evacuate excess gas pressure to the atmosphere when the pressure of the expanded gas exceeds a preset threshold pressure.

Par ailleurs, selon l'invention :

  • les moyens de détente de gaz comprennent un ressort de détente cylindrique agissant sur un piston de détente mobile, et
  • la soupape de sécurité comprend un ressort de soupape cylindrique agissant sur un piston de soupape mobile.
Furthermore, according to the invention:
  • the gas expansion means comprise a cylindrical expansion spring acting on a movable expansion piston, and
  • the safety valve comprises a cylindrical valve spring acting on a movable valve piston.

De plus, dans ce robinet à détendeur intégré (RDI) :

  • le ressort de détente, le piston de détente, le ressort de soupape et le piston de soupape sont agencés coaxiaux (AA),
  • le ressort de soupape cylindrique est agencé dans le ressort de détente cylindrique,
  • le piston de détente mobile comprend une partie avant venant coopérer avec une tige de clapet agencée mobile dans un conduit de liaison venant se raccorder fluidiquement au circuit de gaz interne,
  • la tige de clapet porte un clapet de détente, ledit clapet de détente coopérant avec un siège de clapet, et
  • le ressort de détente est agencé pour normalement repousser le piston de détente mobile pour engendrer un déplacement de la tige de clapet au sein du conduit de liaison de manière à opérer un réglage de la pression de détente désirée.
In addition, in this valve with integrated regulator (RDI):
  • the rebound spring, rebound piston, valve spring and valve piston are arranged coaxially (AA),
  • the cylindrical valve spring is arranged in the cylindrical detent spring,
  • the movable expansion piston comprises a front part which cooperates with a valve stem arranged to move in a connecting duct which is fluidly connected to the internal gas circuit,
  • the valve stem carries an expansion valve, said expansion valve cooperating with a valve seat, and
  • the expansion spring is arranged to normally push back the mobile expansion piston to cause a movement of the valve stem within the connecting duct so as to operate an adjustment of the desired expansion pressure.

Selon le mode de réalisation considéré, le robinet à détendeur intégré selon l'invention peut comprendre l'une ou plusieurs des caractéristiques suivantes :

  • le guide de soupape est agencé entre le ressort de soupape et le ressort de détente.
  • le ressort de soupape et le ressort de détente sont en acier.
  • le ressort de soupape et le ressort de détente sont hélicoïdaux.
  • le diamètre interne du ressort de détente est supérieur au diamètre externe du ressort de soupape.
  • le ressort de soupape et le ressort de détente sont indépendants l'un de l'autre.
  • le ressort de soupape et le ressort de détente ont des raideurs différentes.
  • le ressort de soupape est agencé à l'intérieur du guide de soupape, de préférence coaxialement dans un logement interne du guide de soupape.
  • le piston de détente mobile comprend une partie avant formant un bouclier avant venant coopérer avec la tige de clapet.
  • la tige de clapet est mobile en translation axiale dans le conduit de liaison.
  • la tige de clapet a une forme allongée.
  • le siège de clapet est situé au débouché du conduit de liaison dans le corps du RDI.
  • le siège de clapet est aménagé périphériquement au débouché du conduit de liaison.
  • le siège de clapet a une forme complémentaire de celle du clapet de détente.
  • le clapet de détente et ledit siège de clapet sont situés dans le corps du robinet.
  • la tige de clapet et le clapet de détente sont formés d'une seule pièce.
  • le bouclier avant du piston de détente mobile a une forme de disque comprend une partie centrale venant coopérer avec une extrémité libre de la tige de clapet.
  • la tige du clapet coopère avec le siège de clapet, par exemple en un matériau adapté, tel du nylon® ou analogue, afin de soit garantir une étanchéité fluidique, en particulier lorsque le robinet est fermé, soit fixer un niveau de détente désiré.
  • le bouclier avant comprend un ou plusieurs orifices de passage de gaz agencés autour de la partie centrale et traversant la partie en forme de disque.
  • le bouclier avant est solidaire du piston de détente, par exemple emmanché à force dans le piston de détente.
  • le piston de détente mobile a une forme tubulaire d'axe AA comprenant un logement interne comprenant un épaulement annulaire interne s'étendant radialement dans le logement interne et comprenant une ouverture centrale.
  • le ressort de détente vient appuyer sur l'épaulement annulaire du piston de détente, de préférence par l'intermédiaire du guide de soupape.
  • le ressort de détente repousse normalement le piston de détente mobile en direction de la tige de clapet.
  • un premier joint d'étanchéité, tel un joint torique, est agencé dans une gorge aménagée dans la paroi interne du logement aménagé dans le corps du RDI.
  • le premier joint d'étanchéité est agencé pour assurer une étanchéité fluidique entre le piston de détente mobile et le corps du RDI.
  • l'épaulement annulaire interne du piston de détente comprend, du côté du ressort de détente et du guide de soupape, un évidement annulaire formant une gorge dans laquelle est agencé un second joint d'étanchéité fluidique.
  • le second joint d'étanchéité est agencé pour assurer une étanchéité fluidique entre l'épaulement annulaire interne du piston de détente et le piston de soupape, en particulier une jupe du piston de soupape.
  • le piston de soupape est au moins partiellement agencé mobile dans le guide de soupape.
  • le piston de soupape a une forme de disque bordé par une jupe se projetant axialement en direction du second joint d'étanchéité et venant appuyer dessus.
  • le piston de soupape porte par ailleurs une tête axiale se projetant axialement vers la cloche.
  • le ressort de soupape est agencé autour de tête axiale du piston de soupape.
  • le guide de soupape a une forme tubulaire avec un passage central d'axe AA et comprend un épaulement annulaire externe s'étendant radialement et en éloignement sur la surface périphérique externe du guide de soupape.
  • le ressort de détente vient prendre appui sur ledit épaulement annulaire externe du guide de soupape.
  • le ressort de détente, le piston de détente, le ressort de soupape, le piston de soupape et le guide de soupape sont agencés coaxialement dans un logement à piston/soupape aménagé dans le corps de robinet.
  • le logement à piston/soupape débouche vers l'extérieur du corps du RDI, c'est-à-dire qu'il est aménagé dans la paroi externe du corps de RDI de sorte d'être accessible depuis l'extérieur du corps du RDI via une ouverture large.
  • une cloche de réglage de détente est fixée au corps de robinet et forme un couvercle fermant le logement à piston/soupape aménagé dans le corps de robinet, le ressort de soupape venant appuyer sur un fond borgne de ladite cloche de réglage de détente.
  • la cloche de réglage vient fermer l'ouverture large du logement à piston/soupape à la manière d'un couvercle.
  • la cloche de réglage de détente a une forme générale de coupelle à fond borgne, de préférence elle est taraudée.
  • le fond borgne de la cloche de réglage de détente comprend un ou plusieurs orifices communiquant avec l'atmosphère extérieur.
  • le logement à piston/soupape ne comprend pas de sortie de gaz détendu, c'est-à-dire à la pression de détente souhaitée. Seul un gaz en surpression peut en sortir via le ou les orifices traversant le fond borgne de la soupape de sécurité.
  • le corps de robinet porte sur sa surface extérieure, un filetage agencé autour du logement à piston/soupape contenant le ressort de détente, le piston de détente, le ressort de soupape, le piston de soupape et le guide de soupape.
  • la cloche de réglage de détente vient se visser, via son taraudage, au filetage du corps de robinet.
  • le conduit de liaison relie fluidiquement le circuit de gaz interne au logement à piston/soupape.
  • le logement à piston/soupape comprend un fond borgne au sein duquel débouche le conduit de liaison.
  • l'extrémité libre de la tige de clapet fait saillie dans le logement à piston/soupape.
  • le circuit de gaz comprend un ou plusieurs passages de gaz internes traversant le corps de robinet.
  • l'orifice d'entrée de gaz sous pression est portée par une expansion filetée de forme cylindrique ou tronconique permettant le raccordement par vissage du corps de RDI à un récipient de gaz.
  • l'orifice de sortie de gaz détendu est porté par un raccord ou embout configuré pour permettre le raccordement fluidique, direct ou indirect, d'un appareil ou dispositif utilisant le gaz, typiquement via un conduit flexible acheminant le gaz du RDI à l'appareil ou dispositif, de préférence un appareil ou dispositif médical.
  • le gaz détendu par les moyens de détente de gaz a une pression inférieure à la pression du gaz sous pression avant détente, i.e. non détendu.
  • la pression du gaz détendu sortant par l'orifice de sortie de gaz est inférieure à la pression du gaz sous pression entrant par l'orifice d'entrée de gaz.
  • le gaz sous pression a une pression initiale, c'est-à-dire avant détente, supérieure à 10 bar abs, de préférence supérieure à 50 bars abs, préférentiellement supérieure à 100 bar abs, typiquement d'au moins 200 bar abs, généralement d'au moins 250 bar abs.
  • le gaz détendu a une pression finale, c'est-à-dire après détente, inférieure à 10 bar abs, de préférence inférieure à 6 bars abs.
  • le ressort de détente, le piston de détente, le ressort de soupape et le piston de soupape sont agencés dans un logement du corps de robinet.
  • le corps de robinet est en laiton.
According to the embodiment considered, the tap with integrated regulator according to the invention may comprise one or more of the following characteristics:
  • the valve guide is arranged between the valve spring and the rebound spring.
  • the valve spring and the rebound spring are made of steel.
  • the valve spring and the rebound spring are helical.
  • the inner diameter of the detent spring is greater than the outer diameter of the valve spring.
  • the valve spring and the rebound spring are independent of each other.
  • the valve spring and the rebound spring have different stiffnesses.
  • the valve spring is arranged inside the valve guide, preferably coaxially in an internal housing of the valve guide.
  • the mobile expansion piston comprises a front part forming a front shield which cooperates with the valve stem.
  • the valve stem is movable in axial translation in the connecting duct.
  • the valve stem has an elongated shape.
  • the valve seat is located at the outlet of the connecting duct in the body of the RDI.
  • the valve seat is arranged peripherally at the outlet of the connecting duct.
  • the valve seat has a shape complementary to that of the expansion valve.
  • the relief valve and said valve seat are located in the valve body.
  • the valve stem and the expansion valve are formed in one piece.
  • the front shield of the mobile expansion piston has the shape of a disc and comprises a central part which cooperates with a free end of the valve stem.
  • the valve stem cooperates with the valve seat, for example made of a suitable material, such as nylon ® or the like, in order to either guarantee a seal fluidic, especially when the valve is closed, or set a desired level of relaxation.
  • the front shield comprises one or more gas passage orifices arranged around the central part and passing through the disc-shaped part.
  • the front shield is secured to the expansion piston, for example force-fitted into the expansion piston.
  • the mobile expansion piston has a tubular shape with axis AA comprising an internal housing comprising an internal annular shoulder extending radially in the internal housing and comprising a central opening.
  • the detent spring presses against the annular shoulder of the detent piston, preferably via the valve guide.
  • the detent spring normally pushes the movable detent piston toward the valve stem.
  • a first seal, such as an O-ring, is arranged in a groove provided in the internal wall of the housing provided in the body of the RDI.
  • the first seal is arranged to ensure a fluid seal between the movable expansion piston and the body of the RDI.
  • the internal annular shoulder of the expansion piston comprises, on the side of the expansion spring and of the valve guide, an annular recess forming a groove in which a second fluid seal is arranged.
  • the second seal is arranged to ensure a fluid seal between the internal annular shoulder of the expansion piston and the valve piston, in particular a skirt of the valve piston.
  • the valve piston is at least partially movably arranged in the valve guide.
  • the valve piston has the shape of a disk bordered by a skirt projecting axially in the direction of the second seal and pressing against it.
  • the valve piston also carries an axial head projecting axially towards the bell.
  • the valve spring is arranged around the axial head of the valve piston.
  • the valve guide has a tubular shape with a central passage of axis AA and includes an outer annular shoulder extending radially and away from the outer peripheral surface of the valve guide.
  • the detent spring bears against said external annular shoulder of the valve guide.
  • the rebound spring, rebound piston, valve spring, valve piston and valve guide are arranged coaxially in a piston/valve housing provided in the valve body.
  • the piston/valve housing opens to the outside of the RDI body, i.e. it is located in the outer wall of the RDI body so as to be accessible from outside the RDI body through a wide opening.
  • an expansion adjustment bell is fixed to the valve body and forms a cover closing the piston/valve housing arranged in the valve body, the valve spring pressing against a blind bottom of said expansion adjustment bell.
  • the adjustment bell closes the wide opening of the piston/valve housing like a lid.
  • the trigger adjustment bell has the general shape of a cup with a blind bottom, preferably it is tapped.
  • the blind bottom of the trigger adjustment bell comprises one or more orifices communicating with the outside atmosphere.
  • the piston/valve housing does not include an expanded gas outlet, i.e. at the desired expansion pressure. Only overpressure gas can come out of it via the orifice(s) passing through the blind bottom of the safety valve.
  • the valve body carries on its outer surface a thread arranged around the piston/valve housing containing the rebound spring, rebound piston, valve spring, valve piston and valve guide.
  • the trigger adjustment bell is screwed, via its thread, to the thread of the valve body.
  • the connecting duct fluidically connects the internal gas circuit to the piston/valve housing.
  • the piston/valve housing comprises a blind bottom into which the connecting duct opens.
  • the free end of the plug stem protrudes into the piston/valve housing.
  • the gas circuit includes one or more internal gas passages passing through the valve body.
  • the pressurized gas inlet orifice is carried by a threaded expansion of cylindrical or frustoconical shape allowing connection by screwing of the RDI body to a gas container.
  • the expanded gas outlet orifice is carried by a fitting or end piece configured to allow the direct or indirect fluid connection of an appliance or device using the gas, typically via a flexible conduit conveying the gas from the RDI to the appliance or device, preferably a medical apparatus or device.
  • the gas expanded by the gas expansion means has a pressure lower than the pressure of the pressurized gas before expansion, ie not expanded.
  • the pressure of the expanded gas exiting through the gas outlet orifice is lower than the pressure of the pressurized gas entering through the gas inlet orifice.
  • the pressurized gas has an initial pressure, that is to say before expansion, greater than 10 bar abs, preferably greater than 50 bar abs, preferably greater than 100 bar abs, typically at least 200 bar abs, generally of at least 250 bar abs.
  • the expanded gas has a final pressure, that is to say after expansion, of less than 10 bar abs, preferably less than 6 bar abs.
  • the relief spring, the relief piston, the valve spring and the valve piston are arranged in a housing of the valve body.
  • the faucet body is made of brass.

L'invention concerne en outre un récipient de gaz sous pression comprenant un robinet à détendeur intégré selon l'invention, en particulier une bouteille de gaz.The invention further relates to a pressurized gas container comprising a valve with an integrated pressure reducer according to the invention, in particular a gas cylinder.

L'invention concerne en outre une utilisation d'un récipient de gaz sous pression équipé d'un RDI selon l'invention pour stocker un gaz ou un mélange gazeux choisi parmi oxygène, air, N2O/O2, He/O2, NO/azote, typiquement de l'oxygène.The invention further relates to a use of a pressurized gas container equipped with an RDI according to the invention for storing a gas or a gaseous mixture chosen from oxygen, air, N 2 O/O 2 , He/O 2 , NO/nitrogen, typically oxygen.

L'invention va maintenant être mieux comprise grâce à la description détaillée suivante, faite à titre illustratif mais non limitatif, en référence aux figures annexées parmi lesquelles :

  • Fig. 1 représente un mode de réalisation d'un RDI selon l'invention,
  • Fig. 2 illustre le montage d'un RDI selon l'invention sur une bouteille de gaz,
  • Fig. 3 est un schéma en coupe des moyens de réduction de pression et de la soupape de sécurité d'un RDI selon l'invention, typiquement le RDI de Fig. 1, et
  • Fig. 4 est un schéma en coupe d'un RDI selon l'invention.
The invention will now be better understood thanks to the following detailed description, given by way of illustration but not limitation, with reference to the appended figures, among which:
  • Fig. 1 represents an embodiment of an RDI according to the invention,
  • Fig. 2 illustrates the mounting of an RDI according to the invention on a gas bottle,
  • Fig. 3 is a cross-sectional diagram of the pressure reduction means and the safety valve of an RDI according to the invention, typically the RDI of Fig. 1 , and
  • Fig. 4 is a cross-sectional diagram of an RDI according to the invention.

Fig. 1 représente un mode de réalisation d'un robinet à détendeur intégré 1 ou RDI servant à la distribution de gaz selon l'invention, lequel comprend un corps 2 de robinet formé de laiton, à savoir un alliage CuZn40Pb2 par exemple. Fig. 1 represents an embodiment of a valve with an integrated regulator 1 or RDI used for the distribution of gas according to the invention, which comprises a valve body 2 formed of brass, namely a CuZn40Pb2 alloy for example.

Le RDI 1 comprend des moyens de détente de gaz 10, 11, c'est-à-dire des moyens de réduction de pression, permettant d'opérer une détente du gaz sous pression, c'est-à-dire une réduction de la pression du gaz depuis une valeur de pression haute de plusieurs dizaines, voire centaine de bar abs, jusqu'à une valeur de pression basse, c'est-à-dire un niveau de pression de détente. Le niveau de pression de détente, c'est-à-dire après réduction de pression, peut être fixé ou réglé au moyen des moyens de réduction de pression, comme expliqué ci-après en référence à la Fig. 3, par exemple de l'ordre de quelques bars (i.e. < 10 bar abs), par exemple de l'ordre de 4,5 bar abs.The RDI 1 comprises gas expansion means 10, 11, that is to say pressure reduction means, making it possible to operate an expansion of the pressurized gas, that is to say a reduction of the pressure of the gas from a high pressure value of several tens or even hundreds of bar abs, down to a low pressure value, that is to say an expansion pressure level. The expansion pressure level, that is to say after pressure reduction, can be fixed or adjusted by means of the pressure reduction means, as explained below with reference to the Fig. 3 , for example of the order of a few bars (ie <10 bar abs), for example of the order of 4.5 bar abs.

Le corps 2 de robinet est traversé par un circuit de gaz interne 33, c'est-à-dire un ou plusieurs passages ou conduits, permettant d'acheminer le gaz, à savoir le un gaz à haute pression et le gaz détendu, entre une entrée de fluide 30 portée par une expansion ou embout fileté 31, de forme cylindrique ou tronconique, et une sortie de fluide 40, à savoir une sortie en débit, portée par un premier raccord de sortie 41.The valve body 2 is crossed by an internal gas circuit 33, that is to say one or more passages or ducts, making it possible to convey the gas, namely the high pressure gas and the expanded gas, between a fluid inlet 30 carried by a expansion or threaded tip 31, of cylindrical or frustoconical shape, and a fluid outlet 40, namely a flow outlet, carried by a first outlet connector 41.

L'embout fileté 31 permet de fixer par vissage, le corps 2 de robinet à un récipient de gaz 60, telle une bouteille de gaz, comme illustré en Fig. 2, contenant le gaz sous pression, c'est-à-dire à pression haute, dans son volume interne 61.The threaded end piece 31 makes it possible to fix, by screwing, the valve body 2 to a gas container 60, such as a gas bottle, as illustrated in Fig. 2 , containing the gas under pressure, that is to say at high pressure, in its internal volume 61.

Optionnellement, le corps 2 du RDI 1 peut aussi comprendre une autre sortie de fluide 50, typiquement une sortie dite en pression, portée par un autre raccord de sortie 51, laquelle fournit le gaz non détendu, c'est-à-dire à haute pression.Optionally, the body 2 of the RDI 1 can also comprise another fluid outlet 50, typically a so-called pressure outlet, carried by another outlet connector 51, which supplies the non-expanded gas, that is to say at high pressure.

Les moyens de détente de gaz 10, 11, aussi appelés moyens de réduction de pression sont agencés sur le circuit de gaz interne du corps 2, entre l'entrée de gaz 30 du RDI 1 et la sortie de gaz 40 à pression basse, aussi appelée sortie en débit, portée par le raccord de sortie 41, c'est-à-dire le raccord de sortie en débit.The gas expansion means 10, 11, also called pressure reduction means, are arranged on the internal gas circuit of the body 2, between the gas inlet 30 of the RDI 1 and the gas outlet 40 at low pressure, also called flow outlet, carried by the outlet connector 41, that is to say the flow outlet connector.

Les raccords de sortie 41, 51 sont formés d'un alliage de cuivre, en particulier de laiton, par exemple, on utilise un alliage de type CuZn39Pb3. Ils ont des formes générales tubulaires, i.e. allongées avec passage axial pour le gaz communiquant fluidiquement avec le circuit de fluide interne du corps 2 et débouchant au niveau des orifices de sortie 40, 50. La paroi périphérique externe de ces raccords 41, 51 comprend une ou plusieurs sections cylindriques.The outlet connectors 41, 51 are made of a copper alloy, in particular brass, for example, an alloy of the CuZn39Pb3 type is used. They have generally tubular shapes, ie elongated with axial passage for the gas communicating fluidly with the internal fluid circuit of the body 2 and opening out at the level of the outlet orifices 40, 50. The external peripheral wall of these fittings 41, 51 comprises a or more cylindrical sections.

Par ailleurs, le corps 2 du RDI 1 est aussi équipé d'un manomètre 70 permettant de visualiser la pression du gaz dans le circuit de gaz du corps 2, en amont des moyens de détente 10, 11, qui reflète celle dans le volume interne 61 du récipient 60 de gaz sous pression.Furthermore, the body 2 of the RDI 1 is also equipped with a pressure gauge 70 making it possible to visualize the gas pressure in the gas circuit of the body 2, upstream of the expansion means 10, 11, which reflects that in the internal volume 61 of the container 60 of pressurized gas.

Sur les Fig. 1 et Fig. 4, le manomètre 70 est du type à aiguille, alors que sur la Fig. 2, le manomètre 70 est digital, c'est-à-dire qu'il s'agit d'un dispositif électronique à afficheur numérique 71, mettant en oeuvre un (ou plusieurs) microprocesseur associé à un ou des capteurs de température et/ou de pression et permettant de déterminer la pression de gaz, voire d'autres grandeurs, comme une autonomie en gaz ou un volume de gaz résiduel dans le récipient 60, puis de les afficher sur l'afficheur numérique 71.On the Fig. 1 and Fig. 4 , the pressure gauge 70 is of the needle type, whereas on the Fig. 2 , the pressure gauge 70 is digital, that is to say it is an electronic device with a digital display 71, implementing one (or more) microprocessor associated with one or more temperature sensors and/or pressure and making it possible to determine the gas pressure, or even other quantities, such as a gas autonomy or a volume of residual gas in the container 60, then to display them on the digital display 71.

Le corps 2 de robinet porte également un organe de réglage de débit 42, tel un volant rotatif, coopérant avec des moyens de contrôle de débit de manière à permettre à un utilisateur de régler le débit de fluide délivré par le raccord 41 de distribution de fluide, typiquement des débits compris entre 0 et 30 L/min, de préférence entre 0 et 15 L/min, voire 20 L/min. Les moyens de contrôle de débit peuvent comprendre par exemple un disque à orifices calibrés de différentes dimensions, i.e. diamètres, qui correspondent aux différents débits de gaz sélectionnables.The valve body 2 also carries a flow adjustment member 42, such as a rotary wheel, cooperating with flow control means so as to allow a user to adjust the flow of fluid delivered by the connection 41 for dispensing fluid, typically flow rates between 0 and 30 L/min, preferably between 0 and 15 L/min, or even 20 L/min. The flow control means may for example comprise a disc with calibrated orifices of different dimensions, ie diameters, which correspond to the different selectable gas flow rates.

Dans les modes de réalisation des Fig. 1 et Fig. 2, l'organe de réglage de débit 42 est un volant rotatif manipulable par l'utilisateur, qui est agencé autour et coaxialement au raccord 41 de distribution de fluide. Le volant rotatif a une forme générale de couronne et comprend des logements décalés angulairement les uns des autres et dimensionnés pour permettre à un utilisateur d'y insérer des doigts afin d'exercer un mouvement visant à tourner le volant rotatif dans le sens horaire ou antihoraire pour fixer le débit de gaz souhaité.In the embodiments of Fig. 1 and Fig. 2 , the flow control member 42 is a rotary wheel that can be manipulated by the user, which is arranged around and coaxially with the connector 41 for distributing the fluid. The rotary flywheel has the general shape of a crown and comprises housings angularly offset from each other and sized to allow a user to insert fingers therein in order to exert a movement aimed at turning the rotary flywheel clockwise or counterclockwise to set the desired gas flow.

Le corps 2 de robinet peut comprendre d'autres composants, comme par exemple un raccord de remplissage (non visible), c'est-à-dire un raccord supplémentaire, configuré pour recevoir une prise de remplissage qui vient s'y raccorder mécaniquement et fluidiquement afin de permettre d'introduire du fluide frais dans le volume interne 61 du récipient 60 de fluide lorsqu'il est vide par exemple. Ce raccord de remplissage comprend une valve de remplissage empêchant, en temps normal, la sortie de fluide par ce raccord. Le raccord de remplissage est en communication fluidique avec le volume interne 61 du récipient 60 via le circuit de gaz interne du corps 2 du RDI 1 et l'orifice d'entrée 30 porté par l'embout fileté 31.The valve body 2 may comprise other components, such as for example a filling connection (not visible), that is to say an additional connection, configured to receive a filling plug which is connected to it mechanically and fluidically in order to allow the introduction of fresh fluid into the internal volume 61 of the container 60 of fluid when it is empty for example. This filling connection comprises a filling valve preventing, in normal times, the exit of fluid through this connection. The filling connector is in fluid communication with the internal volume 61 of the container 60 via the internal gas circuit of the body 2 of the RDI 1 and the inlet 30 carried by the threaded end piece 31.

Le corps 2 de robinet peut comprendre aussi un mécanisme de pression résiduelle permettant de garantir ou conserver une pression positive minimale dans le récipient en empêchant une vidange totale de celui-ci, c'est-à-dire un soutirage total du fluide.The valve body 2 may also comprise a residual pressure mechanism making it possible to guarantee or maintain a minimum positive pressure in the container by preventing a total emptying of the latter, that is to say a total withdrawal of the fluid.

De plus, comme expliqué ci-après et illustré en Fig. 3, le corps 2 du RDI 1 comprend aussi une soupape de sécurité 20, 21 permettant d'évacuer toute pression excessive dans le circuit de gaz du corps 2 de robinet, en aval des moyens de détente, c'est-à-dire d'évacuer à l'atmosphère toute pression supérieure à une valeur-seuil de sécurité, par exemple en cas de fuite interne du robinet.In addition, as explained below and illustrated in Fig. 3 , the body 2 of the RDI 1 also comprises a safety valve 20, 21 making it possible to evacuate any excessive pressure in the gas circuit of the body 2 of the valve, downstream of the expansion means, that is to say to evacuate to the atmosphere any pressure above a safety threshold value, for example in the event of an internal valve leak.

Fig. 2 schématise un RDI 1 selon l'invention monté sur un récipient de fluide 60 de type bouteille de gaz en forme d'ogive, c'est-à-dire avec corps de récipient 61 de forme cylindrique (d'axe AA) comprenant une extrémité rétrécie formant un col portant une ouverture taraudée communiquant fluidiquement avec le volume interne 61 de la bouteille de gaz. Le RDI 1 est fixé par vissage, via son embout fileté 31, dans l'ouverture taraudée du col. Fig. 2 diagrams an RDI 1 according to the invention mounted on a fluid container 60 of the gas bottle type in the shape of an ogive, that is to say with container body 61 of cylindrical shape (with axis AA) comprising one end narrowed forming a collar carrying a threaded opening communicating fluidly with the internal volume 61 of the gas cylinder. The RDI 1 is fixed by screwing, via its threaded end piece 31, into the threaded opening of the neck.

Le corps cylindrique creux du récipient 60 comprend un volume interne 61 servant à contenir le gaz sous pression, c'est-à-dire à pression haute, typiquement un gaz médical comprimé, tel l'oxygène, à une pression pouvant atteindre 200 à 300 bar abs, voire plus (lorsque la bouteille est pleine). Le volume interne 61 peut avoir une contenance de 0,5 à 10 L (équiv. en eau), par exemple 2 L, 5 L ou 7 L. Son diamètre est de l'ordre de 10 à 20 cm, typiquement de l'ordre de 12 à 16 cm, par exemple environ 14 cm.The hollow cylindrical body of the container 60 comprises an internal volume 61 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 200 to 300 bar abs, or even more (when the bottle is full). The internal volume 61 can have a capacity of 0.5 to 10 L (equiv. in water), for example 2 L, 5 L or 7 L. Its diameter is of the order of 10 to 20 cm, typically order from 12 to 16 cm, for example about 14 cm.

Le corps 2 du RDI 1 (non visible) est protégé ici par un capotage de protection 80 comprenant un corps rigide 81, en polymère ou métallique, définissant une enceinte protectrice dans laquelle vient se positionner le corps 2 de robinet du RDI 1 et fixé à celui-ci ou au col de la bouteille 60 par son embase 82.The body 2 of the RDI 1 (not visible) is protected here by a protective cover 80 comprising a rigid body 81, made of polymer or metal, defining a protective enclosure in which the body 2 of the valve of the RDI 1 is positioned and fixed to this one or to the neck of the bottle 60 by its base 82.

Le corps rigide 81 du capotage 80 comprend par ailleurs une poignée de transport 84 surmontant le corps 81 et reliée à celui-ci par des montants-supports 83 afin de permettre à un utilisateur de soulever et transporter manuellement l'ensemble capotage/RDI/bouteille. La poignée de transport 84 est située à l'opposé de l'embase 82 par rapport au corps 81 de capotage.The rigid body 81 of the cowling 80 also comprises a carrying handle 84 surmounting the body 81 and connected to the latter by support uprights 83 in order to allow a user to manually lift and transport the cowling/RDI/bottle assembly. . The carrying handle 84 is located opposite the base 82 with respect to the body 81 of the cowling.

Préférentiellement, est aussi prévu aussi un dispositif d'accrochage pivotant 85 (partiellement visible) situé à l'opposé du raccord 41 de sortie. Ce dispositif d'accrochage pivotant 85 sert à l'accrochage de l'ensemble capotage/RDI/bouteille sur un barreau de lit d'hôpital ou de brancard ou tout autre support analogue, par exemple tringle ou autre. Le dispositif d'accrochage 85 peut pivoter, lorsqu'il est déplié par l'utilisateur, entre une position repliée ou position de repos, dans laquelle il est positionné le long du corps 81 de capotage, comme illustré en Fig. 2, et une position dépliée ou position d'accrochage, dans laquelle le dispositif d'accrochage 85 est pivoté et angulairement écarté du corps 81 de capotage de manière à permettre son arrimage ou accrochage à un barreau de lit ou analogue. Un tel dispositif d'accrochage pivotant 85 est décrit par EP-A-2918893 Preferably, there is also provided a pivoting hooking device 85 (partially visible) situated opposite the connector 41 of the outlet. This pivoting attachment device 85 is used to attach the cover/RDI/bottle assembly to a bar of a hospital bed or stretcher or any other similar support, for example rod or other. The attachment device 85 can pivot, when it is unfolded by the user, between a folded position or a rest position, in which it is positioned along the body 81 of the cowling, as illustrated in Fig. 2 , and an unfolded position or hooking position, in which the hooking device 85 is pivoted and angularly separated from the body 81 of the cowling so as to allow its stowage or hooking to a bed rail or the like. Such a pivoting attachment device 85 is described by EP-A-2918893

Le gaz sous pression est introduit dans le volume interne 61, lors du remplissage du récipient 60, via le raccord de remplissage et le circuit interne du RDI 1 (non visible) et au travers du col du récipient 60. L'extraction du gaz sous pression, lors du soutirage, se fait dans le sens opposé.The pressurized gas is introduced into the internal volume 61, when the container 60 is filled, via the filling connector and the internal circuit of the RDI 1 (not visible) and through the neck of the container 60. The extraction of the gas under pressure, during racking, is in the opposite direction.

Lors de son utilisation, des tuyaux flexibles, en métal ou en plastique, ou d'autres interfaces ou dispositifs peuvent connectés et déconnectés au ou aux raccords 41, 51 du RDI 1. Les raccords 41, 51 peuvent être nickelés, c'est-à-dire recouverts d'un revêtement à base de nickel déposé sur le laiton formant les raccords 41, 51.In use, flexible tubing, metal or plastic, or other interfaces or devices may be connected and disconnected to fitting(s) 41, 51 of RDI 1. Fittings 41, 51 may be nickel plated, i.e. that is to say covered with a nickel-based coating deposited on the brass forming the fittings 41, 51.

Fig. 3 est un schéma en coupe des moyens de réduction de pression et de la soupape de sécurité 20, 21 d'un RDI 1 selon l'invention et Fig. 4 est un schéma en coupe du RDI 1 incluant les éléments de Fig. 3. Fig. 3 is a cross-sectional diagram of the pressure reduction means and the safety valve 20, 21 of an RDI 1 according to the invention and Fig. 4 is a cross-sectional diagram of RDI 1 including the elements of Fig. 3 .

Comme susmentionné, le RDI 1 comprend des moyens de détente de gaz 10, 11, 13, 34 qui sont agencés sur le circuit de gaz traversant le corps 2 du RDI 1 et qui servent à opérer une réduction de la pression du gaz sous pression, c'est-à-dire une détente du gaz, circulant dans le circuit de gaz et obtenir un gaz détendu. Lors de cette détente, le gaz sous pression passe de la pression haute (i.e. qui équivaut à la pression dans la bouteille) à une pression basse préfixée, typiquement moins de 10 bars abs.As mentioned above, the RDI 1 comprises gas expansion means 10, 11, 13, 34 which are arranged on the gas circuit passing through the body 2 of the RDI 1 and which serve to operate a reduction in the pressure of the pressurized gas, that is to say an expansion of the gas, circulating in the gas circuit and obtaining an expanded gas. During this expansion, 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.

De plus, afin de palier à toute surpression éventuelle, par exemple résultant d'une fuite interne, le RDI 1 comprend aussi une soupape de sécurité 20, 21 permettant d'évacuer au moins une partie de la surpression gazeuse vers l'atmosphère lorsque la pression du gaz détendu excède une pression-seuil préfixée.In addition, in order to overcome any possible overpressure, for example resulting from an internal leak, the RDI 1 also comprises a safety valve 20, 21 allowing at least part of the gaseous overpressure to be evacuated to the atmosphere when the expanded gas pressure exceeds a preset threshold pressure.

Comme illustré en Fig. 3 et Fig. 4, les moyens de détente de gaz 10, 11 comprennent un ressort de détente cylindrique 10 agissant sur un piston de détente mobile 11, par l'intermédiaire du guide soupape, une tige de clapet 13 mobile au sein d'un passage ou conduit de liaison 32 venant se raccorder fluidiquement au circuit de gaz interne 33, i.e. un ou plusieurs passages de gaz, et un siège de clapet 34 coopérant avec la tige de clapet 13 pour contrôler la détente du gaz au sein du circuit de gaz interne 33.As illustrated in Fig. 3 and Fig. 4 , the gas expansion means 10, 11 comprise a cylindrical expansion spring 10 acting on a movable expansion piston 11, via the valve guide, a valve stem 13 movable within a connecting passage or duct 32 coming to be fluidically connected to the internal gas circuit 33, ie one or more gas passages, and a valve seat 34 cooperating with the valve stem 13 to control the expansion of the gas within the internal gas circuit 33.

La tige de clapet 13 a une forme allongée et est mobile en translation axiale dans le conduit de liaison 32, c'est-à-dire axialement dans le conduit de liaison 32. Le conduit de liaison 32 et le siège de clapet 34 sont situés dans le corps 2 du RDI.The valve stem 13 has an elongated shape and is movable in axial translation in the connecting duct 32, that is to say axially in the connecting duct 32. The connecting duct 32 and the valve seat 34 are located in body 2 of the RDI.

La tige de clapet 13 porte un clapet de détente 35 coopérant avec le siège de clapet 34. Avantageusement, le siège de clapet 34 a une forme complémentaire de celle du clapet de détente 35 afin d'assurer, selon le cas, une étanchéité entre eux ou à l'inverse, une détente efficace du gaz.The valve stem 13 carries an expansion valve 35 cooperating with the valve seat 34. Advantageously, the valve seat 34 has a shape complementary to that of the expansion valve 35 in order to ensure, as the case may be, a seal between them. or conversely, effective expansion of the gas.

Le siège de clapet 34 est situé au débouché du conduit de liaison 32 dans le corps 2 du RDI, c'est-à-dire périphériquement au débouché 36 du conduit de liaison 32, à savoir du côté du circuit de gaz interne 33.The valve seat 34 is located at the outlet of the connecting conduit 32 in the body 2 of the RDI, that is to say peripherally to the outlet 36 of the connecting conduit 32, namely on the side of the internal gas circuit 33.

Le piston de détente mobile 11 comprend une partie avant ou bouclier avant 12 venant coopérer avec la tige 13 de clapet, à savoir avec son extrémité libre 13a.The movable expansion piston 11 comprises a front part or front shield 12 which cooperates with the valve rod 13, namely with its free end 13a.

Lorsque la tige de clapet 13 est repoussée par le ressort de détente cylindrique 10, le clapet de détente 35 se décolle du siège de clapet 34, en particulier lorsque le robinet est ouvert par l'utilisateur, afin d'opérer une détente du gaz et donc de libérer du gaz qui est distribué par le premier raccord de sortie 41 portant l'orifice de sortie 40 de gaz. A l'inverse, lorsque le robinet 1 est en position fermée, la coopération entre clapet de détente 35 et siège de clapet 34 permet de garantir une étanchéité fluidique.When the valve stem 13 is pushed back by the cylindrical expansion spring 10, the expansion valve 35 separates from the valve seat 34, in particular when the valve is opened by the user, in order to operate a gas expansion and therefore to release gas which is distributed by the first outlet fitting 41 carrying the outlet orifice 40 of gas. Conversely, when the valve 1 is in the closed position, the cooperation between expansion valve 35 and valve seat 34 makes it possible to guarantee fluid tightness.

Comme visible sur les Fig. 3 et Fig. 4, le piston de détente mobile 11 et la soupape de sécurité 20, 21 sont (au moins partiellement) agencés dans un logement à piston/soupape 3 aménagé dans le corps 2 du RDI 1, en particulier dans la paroi périphérique du corps 2 de sorte que le logement 3 à piston/soupape est ouvert sur l'extérieur, via une ouverture large 38, de manière à pouvoir y agencer notamment le piston de détente mobile 11 et la soupape de sécurité 20, 21.As seen on the Fig. 3 and Fig. 4 , the movable expansion piston 11 and the safety valve 20, 21 are (at least partially) arranged in a piston/valve housing 3 arranged in the body 2 of the RDI 1, in particular in the peripheral wall of the body 2 so that the piston/valve housing 3 is open to the outside, via a wide opening 38, so as to be able to arrange therein in particular the movable expansion piston 11 and the safety valve 20, 21.

Le conduit 32 relie fluidiquement le circuit de gaz interne 33 au fond borgne 3A du logement à piston/soupape 3, c'est-à-dire que le conduit 32 débouche dans le logement 3 à piston/soupape au niveau d'un orifice d'entrée 37 aménagé dans son fond borgne 3A.The conduit 32 fluidically connects the internal gas circuit 33 to the blind bottom 3A of the piston/valve housing 3, that is to say that the conduit 32 opens into the piston/valve housing 3 at an orifice of entrance 37 arranged in its blind bottom 3A.

Une cloche de réglage de détente 4 ferme extérieurement le logement à piston/soupape 3 et vient se fixer par vissage au corps 2 du RDI 1, comme expliqué ci-après. La cloche de réglage 4 vient donc fermer l'ouverture large 38 du logement à piston/soupape 3 à la manière d'un couvercle.A trigger adjustment bell 4 closes the piston/valve housing 3 on the outside and is fixed by screwing to the body 2 of the RDI 1, as explained below. The adjustment bell 4 therefore closes the wide opening 38 of the piston/valve housing 3 like a cover.

Le gaz circule dans le circuit interne de gaz 33 aménagé dans le corps 2 du RDI 1, en y entrant par l'orifice d'entrée de gaz sous pression 30 et en ressortant, après détente, par l'orifice de sortie de gaz détendu 40 porté par le raccord 41 de sortie de gaz. La détente du gaz est obtenue du fait de la coopération entre le clapet de détente 35 porté par la tige de clapet 13, et le siège de clapet 34.The gas circulates in the internal gas circuit 33 arranged in the body 2 of the RDI 1, entering it through the pressurized gas inlet orifice 30 and emerging, after expansion, through the expanded gas outlet orifice. 40 carried by the connection 41 of the gas outlet. The expansion of the gas is obtained due to the cooperation between the expansion valve 35 carried by the valve stem 13, and the valve seat 34.

Autrement dit, le gaz détendu ressort, en fonctionnement normal, par le premier raccord de sortie 41 porté par le corps 2 du robinet, c'est-à-dire qu'aucune sortie de gaz n'est prévue depuis le logement 3 à piston/soupape vers l'extérieur sauf en cas de surpression. En effet, le gaz ne sort du logement à piston/soupape 3 qu'en cas de surpression, lorsqu'il est évacué à l'atmosphère par la soupape de sécurité 20, 21 via les orifices 5, comme expliqué ci-après.In other words, the expanded gas comes out, in normal operation, through the first outlet connector 41 carried by the body 2 of the valve, that is to say that no gas outlet is provided from the piston housing 3 / valve outwards except in case of overpressure. In fact, the gas only leaves the piston/valve housing 3 in the event of overpressure, when it is evacuated to the atmosphere by the safety valve 20, 21 via the orifices 5, as explained below.

Le bouclier avant 12 du piston de détente mobile 11 a préférentiellement une forme de disque comprend une partie centrale 12a venant coopérer avec une extrémité libre 13a de la tige de clapet 13 et, par ailleurs, un ou plusieurs orifices 12b de passage de gaz agencés autour de la partie centrale 12a.The front shield 12 of the movable expansion piston 11 preferably has the shape of a disc comprises a central part 12a which cooperates with a free end 13a of the valve stem 13 and, moreover, one or more gas passage orifices 12b arranged around of the central part 12a.

La tige de clapet 13 qui est mobile axialement dans le conduit de liaison 32, passe au travers de l'orifice d'entrée 37 aménagé dans le fond 3A du logement à piston/soupape 3 de sorte que l'extrémité libre 13a de la tige de clapet 13 fasse saillie dans le logement à piston/soupape 3 et puisse coopérer avec le bouclier avant 12 du piston de détente mobile 11.The valve rod 13, which is axially movable in the connecting duct 32, passes through the inlet 37 provided in the bottom 3A of the piston/valve housing 3 so that the free end 13a of the rod of valve 13 protrudes into the piston/valve housing 3 and can cooperate with the front shield 12 of the movable expansion piston 11.

Le bouclier avant 12 est solidaire du piston de détente 11, par exemple le bouclier peut être emmanché à force dans le piston de détente 11. Le piston de détente 11 avec son bouclier avant 12 permet d'exercer un effort sur l'extrémité libre 13a de la tige de clapet 13, en cas de dépression lors de l'ouverture du RDI 1, et ainsi de libérer le gaz contenu dans la bouteille et obtenir le gaz détendu, après détente. Le bouclier 12 et le piston 11 sont pourvus d'orifices, ouvertures ou passages 12b, 14, respectivement, qui permettent au gaz de circuler jusqu'au piston de soupape 21.The front shield 12 is integral with the trigger piston 11, for example the shield can be force-fitted into the trigger piston 11. The trigger piston 11 with its front shield 12 makes it possible to exert a force on the free end 13a of the valve stem 13, in the event of depression during the opening of the RDI 1, and thus to release the gas contained in the bottle and obtain the expanded gas, after expansion. Shield 12 and piston 11 are provided with ports, openings or passages 12b, 14, respectively, which allow gas to flow to valve piston 21.

Le piston de détente 11 a une forme générale tubulaire d'axe AA comprenant un logement interne 15 comprenant un épaulement annulaire interne 14 s'étendant radialement dans le logement interne 15 et comprenant une ouverture centrale 14a, c'est-à-dire formant une restriction de passage. Le ressort de détente 10 vient appuyer sur l'épaulement annulaire 14 du piston de détente 11 par l'intermédiaire un guide de soupape 16.The trigger piston 11 has a generally tubular shape with axis AA comprising an internal housing 15 comprising an internal annular shoulder 14 extending radially into the internal housing 15 and comprising a central opening 14a, that is to say forming a passage restriction. The detent spring 10 presses on the annular shoulder 14 of the expansion piston 11 via a valve guide 16.

Plus précisément, le guide de soupape 16 a une forme générale tubulaire et comprend un passage central 19 d'axe AA avec une ouverture large à la première extrémité 16a du guide de soupape 16 et avec une ouverture resserrée 18, c'est-à-dire une restriction de passage, à la seconde extrémité 16b du guide de soupape 16. La première extrémité 16a du guide de soupape 16 comprend en outre un épaulement annulaire externe 17 s'étendant radialement et en éloignement sur la surface périphérique externe du guide de soupape 16.More precisely, the valve guide 16 has a generally tubular shape and comprises a central passage 19 of axis AA with a wide opening at the first end 16a of the valve guide 16 and with a narrow opening 18, i.e. say a passage restriction, at the second end 16b of the valve guide 16. The first end 16a of the valve guide 16 further comprises an outer annular shoulder 17 extending radially and away from the outer peripheral surface of the valve guide 16.

Le ressort de détente 10 vient prendre appui sur l'épaulement annulaire externe 17 du guide de soupape 16 pour le repousser contre le piston de détente 11 étant donné que l'épaulement annulaire externe 17 du guide de soupape 16 vient appuyer sur l'épaulement annulaire interne 14 du piston de détente 11. L'épaulement annulaire externe 17 du guide de soupape 16 est donc pris en sandwich entre l'épaulement annulaire interne 14 du piston de détente 11 et une extrémité active 10a libre du ressort de détente 10.The detent spring 10 bears against the outer annular shoulder 17 of the valve guide 16 to push it against the detent piston 11 since the outer annular shoulder 17 of the valve guide 16 bears against the annular shoulder internal annular shoulder 14 of the expansion piston 11. The external annular shoulder 17 of the valve guide 16 is therefore sandwiched between the internal annular shoulder 14 of the expansion piston 11 and a free active end 10a of the expansion spring 10.

Comme on le voit, le guide de soupape 16 est agencé coaxialement (axe AA) et partiellement inséré dans le logement interne du piston de détente 11, alors que le ressort de détente 10 de forme cylindrique est agencé autour du guide de soupape 16, c'est-à-dire entre la paroi périphérique externe du guide de soupape 16 et la paroi interne du logement interne 15 du piston de détente 11. Le guide de soupape 16, le piston de détente 11 et le ressort de détente 10 sont donc agencés coaxialement les uns aux autres.As can be seen, the valve guide 16 is arranged coaxially (axis AA) and partially inserted into the internal housing of the expansion piston 11, while the expansion spring 10 of cylindrical shape is arranged around the valve guide 16, c that is to say between the outer peripheral wall of the valve guide 16 and the inner wall of the inner housing 15 of the expansion piston 11. The valve guide 16, the expansion piston 11 and the expansion spring 10 are therefore arranged coaxially with each other.

Le ressort de détente 10 repousse normalement le piston de détente mobile 11 en direction de la tige de clapet 13, ce qui engendre un déplacement de la tige de clapet 13 dans le conduit 32, ce qui décolle le clapet de détente 35 du siège de clapet 34, et permet alors un réglage de la pression de détente désiré. Autrement dit, la tige de clapet 13 portant le clapet de détente 35 et le siège de clapet 34 agencé dans le corps 2 du RDI 1 forment un ensemble siège/clapet de détente.The detent spring 10 normally pushes the mobile detent piston 11 towards the valve stem 13, which generates a displacement of the valve stem 13 in the conduit 32, which separates the detent valve 35 from the valve seat. 34, and then allows adjustment of the desired trigger pressure. In other words, the valve stem 13 carrying the expansion valve 35 and the valve seat 34 arranged in the body 2 of the RDI 1 form a seat/expansion valve assembly.

Un premier joint d'étanchéité 8, tel un joint torique, agencé dans une gorge 6 aménagée dans la paroi interne du logement à piston/soupape 3 aménagé dans le corps 2 du RDI, assure une étanchéité fluidique entre le piston de détente mobile 11 et le corps 2 du RDI 1.A first seal 8, such as an O-ring, arranged in a groove 6 provided in the internal wall of the piston/valve housing 3 provided in the body 2 of the RDI, ensures a fluid seal between the movable expansion piston 11 and the body 2 of the RDI 1.

Par ailleurs, l'épaulement annulaire interne 14 du piston de détente 11 comprend, du côté du ressort de détente 10 et du guide de soupape 16, un évidement 14b annulaire formant une gorge dans laquelle est agencé un second joint d'étanchéité 9 fluidique.Furthermore, the internal annular shoulder 14 of the expansion piston 11 comprises, on the side of the expansion spring 10 and of the valve guide 16, an annular recess 14b forming a groove in which is arranged a second fluid seal 9 .

En outre, comme déjà dit, la cloche de réglage de détente 4 vient se fixer par vissage au corps 2 du RDI 1, via un taraudage interne. Elle forme un couvercle fermant le logement 3 du corps 2 de RDI dans lequel sont agencés le ressort de détente 10, le piston de détente mobile 11 et le guide de soupape 16, ainsi que les éléments de la soupape de sécurité 20, 21, comme expliqué ci-après.In addition, as already said, the trigger adjustment bell 4 is fixed by screwing to the body 2 of the RDI 1, via an internal thread. It forms a cover closing the housing 3 of the body 2 of RDI in which are arranged the trigger spring 10, the movable trigger piston 11 and the valve guide 16, as well as the elements of the safety valve 20, 21, as explained below.

La cloche de réglage de détente 4 a une forme générale de coupelle à fond borgne 4a. Le fond borgne 4a vient repousser l'extrémité passive libre 10b du ressort de détente 10, c'est-à-dire que, dit autrement, l'extrémité passive libre 10b du ressort de détente 10 vient reposer sur le fond borgne 4a de la cloche de réglage de détente 4.The trigger adjustment bell 4 has the general shape of a cup with a blind bottom 4a. The blind bottom 4a comes to push the free passive end 10b of the trigger spring 10, that is to say that, in other words, the free passive end 10b of the trigger spring 10 comes to rest on the blind bottom 4a of the trigger adjustment bell 4.

Le fond borgne 4a de la cloche de réglage de détente 4 est percé d'un ou plusieurs orifices 5 de passage de gaz communiquant avec l'atmosphère ambiante et permettant d'évacuer les surpressions gazeuses vers l'extérieur.The blind bottom 4a of the expansion adjustment bell 4 is pierced with one or more orifices 5 for the passage of gas communicating with the ambient atmosphere and making it possible to evacuate the gaseous overpressures to the outside.

Autrement dit, la cloche de réglage 4 permet de régler la précontrainte du ressort de détente 10 et donc la pression de détente. La cloche 4 est vissée sur le corps 2 du RDI 1 et le réglage de contrainte, donc de pression de détente, s'effectue en jouant sur la course de vissage. La cloche 4 est percée de trous ou orifices 5 de passage de gaz qui permettent l'évacuation du gaz vers l'extérieur en cas d'ouverture de la soupape de sécurité 20, 21.In other words, the adjustment bell 4 makes it possible to adjust the preload of the trigger spring 10 and therefore the trigger pressure. The bell 4 is screwed onto the body 2 of the RDI 1 and the stress adjustment, therefore of the trigger pressure, is carried out by varying the screwing stroke. The bell 4 is pierced with holes or orifices 5 for the passage of gas which allow the evacuation of the gas to the outside in the event of the opening of the safety valve 20, 21.

En outre, le RDI 1 comprend aussi une soupape de sécurité 20, 21 comprenant un ressort de soupape cylindrique 20 agissant sur un piston de soupape mobile 21 qui sont agencés dans le logement 3 du corps 2 de RDI 1.Furthermore, the RDI 1 also comprises a safety valve 20, 21 comprising a cylindrical valve spring 20 acting on a movable valve piston 21 which are arranged in the housing 3 of the body 2 of the RDI 1.

Plus précisément, le ressort de détente 10, le piston de détente 11, le ressort de soupape 20 et le piston de soupape 21 sont agencés coaxiaux d'axe AA et le ressort de soupape cylindrique 20 est agencé à l'intérieur du ressort de détente 10 cylindrique.More precisely, the detent spring 10, the detent piston 11, the valve spring 20 and the valve piston 21 are arranged coaxial with axis AA and the cylindrical valve spring 20 is arranged inside the detent spring 10 cylindrical.

En fait, le ressort de soupape cylindrique 20 est agencé à l'intérieur du guide de soupape 16, qui est lui-même agencé dans le ressort de détente 10 cylindrique, comme visible sur Fig. 3 et Fig. 4. Le diamètre externe du ressort de soupape cylindrique 20 est donc inférieur au diamètre interne du ressort de détente 10 cylindrique.In fact, the cylindrical valve spring 20 is arranged inside the valve guide 16, which is itself arranged in the cylindrical detent spring 10, as seen in Fig. 3 and Fig. 4 . The outer diameter of the cylindrical valve spring 20 is therefore smaller than the inner diameter of the cylindrical detent spring 10.

Par ailleurs, le ressort de soupape 20 cylindrique vient appuyer sur le piston de soupape 21 mobile de manière à le repousser normalement contre le second joint d'étanchéité 9 fluidique porté par l'épaulement annulaire interne 14 du piston de détente 11 afin d'assurer une étanchéité fluidique entre eux. La raideur du ressort de soupape 20 est choisie pour correspondre au seuil de pression de sécurité, i.e. pression-seuil, à partir duquel la soupape de sécurité 20, 21 s'ouvre en laissant échapper les surpressions vers l'atmosphère.Furthermore, the cylindrical valve spring 20 presses on the movable valve piston 21 so as to push it normally against the second fluid seal 9 carried by the internal annular shoulder 14 of the expansion piston 11 in order to ensure a fluid seal between them. The stiffness of the valve spring 20 is chosen to correspond to the safety pressure threshold, i.e. pressure-threshold, from which the safety valve 20, 21 opens, letting the excess pressure escape to the atmosphere.

Le piston de soupape 21 mobile a une forme de disque 22 bordé par une jupe 23 se projetant axialement en direction du second joint d'étanchéité 9 et venant appuyer dessus, et portant par ailleurs une tête ou expansion axiale 24 se projetant axialement vers la cloche 4. Le ressort de soupape 20 vient s'insérer autour de tête axiale 24 du piston de soupape 21.The movable valve piston 21 has the shape of a disc 22 bordered by a skirt 23 projecting axially in the direction of the second seal 9 and pressing on it, and furthermore carrying a head or axial expansion 24 projecting axially towards the bell 4. The valve spring 20 is inserted around the axial head 24 of the valve piston 21.

En cas de surpression gazeuse supérieure à la force de poussée du ressort de soupape 20, le piston de soupape 21 mobile va être repoussé en direction de la cloche 4 en étant décollé du second joint d'étanchéité 9, ce qui va permettre au gaz en surpression de passer entre le second joint d'étanchéité 9 et la jupe 23 du piston de soupape 21, du fait de la rupture d'étanchéité ainsi produite, et de cheminer successivement au travers de l'orifice 18 du guide de soupape 16 et de ou des orifices 5 de la cloche de réglage de détente 4 et d'être ainsi évacué vers l'extérieur.In the event of gaseous overpressure greater than the thrust force of the valve spring 20, the mobile valve piston 21 will be pushed back in the direction of the bell 4 while being detached from the second seal 9, which will allow the gas in excess pressure to pass between the second seal 9 and the skirt 23 of the valve piston 21, due to the rupture of the seal thus produced, and to travel successively through the orifice 18 of the valve guide 16 and or orifices 5 of the trigger adjustment bell 4 and thus be evacuated to the outside.

En utilisant un ressort de soupape 20 et un piston de soupape mobile 21 indépendants pour la soupape de sécurité, intégrés de manière coaxiale dans les éléments servant à la détente, en particulier le ressort de détente 10, le piston de détente 11, la pression d'ouverture de la soupape de sécurité 20, 21 est constante et peut être réglée indépendamment de la pression de détente puisque la pression de détente et la pression d'ouverture de la soupape de sécurité sont fixées par la raideur de deux ressorts différents ayant chacun leur propre raideur, donc force élastique.By using an independent valve spring 20 and a movable valve piston 21 for the safety valve, coaxially integrated in the elements serving for the expansion, in particular the expansion spring 10, the expansion piston 11, the pressure of opening of the safety valve 20, 21 is constant and can be adjusted independently of the relief pressure since the relief pressure and the opening pressure of the safety valve are fixed by the stiffness of two different springs each having their own own stiffness, therefore elastic force.

Le guide de soupape 16 permet de guider le piston de soupape 21 et de reprendre l'effort du ressort de soupape 20. Le guide de soupape 16 est maintenu contre le piston de détente 11 et le joint d'étanchéité 9, grâce à l'effort exercé par le ressort de détente 10.The valve guide 16 makes it possible to guide the valve piston 21 and to take up the force of the valve spring 20. The valve guide 16 is held against the expansion piston 11 and the seal 9, thanks to the effort exerted by the detent spring 10.

Le piston de soupape permet d'ouvrir la soupape de sécurité 20, 21 en cas de surpression. Lorsque l'effort exercé sur le piston de soupape 21 par la pression de détente (en cas de premier défaut) excède l'effort exercé par le ressort de soupape 20, la soupape de sécurité 20, 21 s'ouvre. Le ressort de soupape 20 monté dans le guide soupape 16 permet d'exercer un effort constant sur le piston de soupape 21, et donc de garantir une pression d'ouverture constante de la soupape de sécurité 20, 21.The valve piston makes it possible to open the safety valve 20, 21 in the event of overpressure. When the force exerted on the valve piston 21 by the expansion pressure (in the event of a first fault) exceeds the force exerted by the valve spring 20, the safety valve 20, 21 opens. The valve spring 20 mounted in the valve guide 16 makes it possible to exert a constant force on the valve piston 21, and therefore to guarantee a constant opening pressure of the safety valve 20, 21.

Le guide de soupape 16 est également pourvu d'orifice(s) 18 qui permettent l'évacuation du gaz vers l'extérieur en cas d'ouverture de la soupape de sécurité 20, 21.The valve guide 16 is also provided with orifice(s) 18 which allow the evacuation of the gas to the outside in the event of the opening of the safety valve 20, 21.

Un tel récipient de fluide sous pression 60 équipé d'un RDI 1 selon l'invention est bien adapté à une utilisation pour stocker un gaz ou un mélange gazeux de qualité médicale du type oxygène, air, N2O/O2, He/O2, NO/azote, typiquement de l'oxygène.Such a pressurized fluid container 60 equipped with an RDI 1 according to the invention is well suited to use for storing a gas or a gaseous mixture of medical quality of the oxygen, air, N 2 O/O 2 , He/ O 2 , NO/nitrogen, typically oxygen.

Claims (15)

Robinet à détendeur intégré (1) pour récipient de gaz sous pression (60) comprenant un corps de robinet (2) comprenant : - un circuit de gaz (33) pour acheminer un gaz sous pression comprenant un orifice d'entrée de gaz sous pression (30) et un orifice de sortie de gaz détendu (40) reliés fluidiquement l'un à l'autre par le circuit interne de gaz (33) de sorte que le gaz sous pression pénètre dans le circuit interne de gaz (33) par l'orifice d'entrée de gaz (30) et en ressorte par l'orifice de sortie de gaz (40), après avoir été détendu par des moyens de détente de gaz (10, 11, 13, 34, 35), lesdits moyens de détente de gaz (10, 11, 13, 34, 35) étant agencés sur le circuit de gaz (33) pour opérer une réduction de la pression du gaz sous pression circulant dans le circuit de gaz (33) et obtenir le gaz détendu, et - une soupape de sécurité (20, 21) pour évacuer une surpression gazeuse vers l'atmosphère lorsque la pression du gaz détendu excède une pression-seuil préfixée, caractérisé en ce que : - les moyens de détente de gaz (10, 11, 13, 34, 35) comprennent un ressort de détente cylindrique (10) agissant sur un piston de détente mobile (11), et - la soupape de sécurité (20, 21) comprend un ressort de soupape cylindrique (20) agissant sur un piston de soupape mobile (21), et robinet (1) dans lequel : - le ressort de détente (10), le piston de détente (11), le ressort de soupape (20) et le piston de soupape (21) sont agencés coaxiaux (AA), - le ressort de soupape cylindrique (20) est agencé dans le ressort de détente (10) cylindrique, - le piston de détente mobile (11) comprend une partie avant (12) venant coopérer avec une tige (13) de clapet agencée mobile dans un conduit de liaison (32) venant se raccorder fluidiquement au circuit de gaz interne (33), - la tige de clapet (13) porte un clapet de détente (35), ledit clapet de détente (35) coopérant avec un siège de clapet (34), et - le ressort de détente (10) est agencé pour normalement repousser le piston de détente mobile (11) en direction de la tige de clapet (13) pour engendrer un déplacement de la tige de clapet (13) au sein du conduit de liaison (32) de manière à opérer un réglage de la pression de détente désirée. Valve with integrated regulator (1) for pressurized gas container (60) comprising a valve body (2) comprising: - a gas circuit (33) for conveying a pressurized gas comprising a pressurized gas inlet orifice (30) and an expanded gas outlet orifice (40) fluidly connected to each other by the circuit internal gas circuit (33) so that the gas under pressure enters the internal gas circuit (33) through the gas inlet orifice (30) and leaves it through the gas outlet orifice (40), after having been expanded by gas expansion means (10, 11, 13, 34, 35), said gas expansion means (10, 11, 13, 34, 35) being arranged on the gas circuit (33) to effect a reduction in the pressure of the gas under pressure circulating in the gas circuit (33) and to obtain the expanded gas, and - a safety valve (20, 21) to evacuate excess gas pressure to the atmosphere when the pressure of the expanded gas exceeds a preset threshold pressure, characterized in that : - the gas expansion means (10, 11, 13, 34, 35) comprise a cylindrical expansion spring (10) acting on a movable expansion piston (11), and - the safety valve (20, 21) comprises a cylindrical valve spring (20) acting on a movable valve piston (21), and valve (1) in which: - the expansion spring (10), the expansion piston (11), the valve spring (20) and the valve piston (21) are arranged coaxially (AA), - the cylindrical valve spring (20) is arranged in the cylindrical expansion spring (10), - the movable expansion piston (11) comprises a front part (12) cooperating with a valve rod (13) arranged movable in a connecting duct (32) fluidically connecting to the internal gas circuit (33), - the valve stem (13) carries an expansion valve (35), said expansion valve (35) cooperating with a valve seat (34), and - the expansion spring (10) is arranged to normally push the mobile expansion piston (11) in the direction of the valve stem (13) to cause a movement of the valve stem (13) within the connecting duct ( 32) so as to adjust the desired trigger pressure. Robinet selon la revendication 1, caractérisé en ce qu'un guide de soupape (16) est agencé entre le ressort de soupape (20) et le ressort de détente (10), ledit ressort de soupape (20) étant agencé à l'intérieur du guide de soupape (16).Valve according to claim 1, characterized in that a valve guide (16) is arranged between the valve spring (20) and the relief spring (10), said valve spring (20) being arranged inside the valve guide (16). Robinet selon la revendication 1, caractérisé en ce que le piston de détente mobile (11) comprend un bouclier avant (12) venant coopérer avec la tige de clapet (13), de préférence avec une extrémité libre (13a) de la tige de clapet (13).Valve according to Claim 1, characterized in that the movable expansion piston (11) comprises a front shield (12) cooperating with the valve stem (13), preferably with a free end (13a) of the valve stem (13). Robinet selon la revendication 1, caractérisé en ce que le piston de détente mobile (11) a une forme tubulaire d'axe AA comprenant un logement interne (15) comprenant un épaulement annulaire interne (14) s'étendant radialement dans le logement interne (15) et comprenant une ouverture centrale (14a).Valve according to Claim 1, characterized in that the mobile expansion piston (11) has a tubular shape with axis AA comprising an internal housing (15) comprising an internal annular shoulder (14) extending radially in the internal housing ( 15) and comprising a central opening (14a). Robinet selon les revendications 1 et 4, caractérisé en ce que le ressort de détente (10) vient appuyer sur l'épaulement annulaire (14) du piston de détente (11), de préférence par l'intermédiaire du guide de soupape (16).Valve according to Claims 1 and 4, characterized in that the expansion spring (10) presses against the annular shoulder (14) of the expansion piston (11), preferably via the valve guide (16). . Robinet selon la revendication 2, caractérisé en ce que le piston de soupape (21) est au moins partiellement agencé mobile dans le guide de soupape (16).Valve according to Claim 2, characterized in that the valve piston (21) is at least partially movably arranged in the valve guide (16). Robinet selon la revendication 2, caractérisé en ce que le guide de soupape (16) a une forme tubulaire avec un passage central (19) d'axe AA et comprend un épaulement annulaire externe (17) s'étendant radialement et en éloignement sur la surface périphérique externe du guide de soupape (16), le le ressort de détente (10) venant prendre appui sur ledit épaulement annulaire externe (17) du guide de soupape (16).Valve according to Claim 2, characterized in that the valve guide (16) has a tubular shape with a central passage (19) of axis AA and comprises an external annular shoulder (17) extending radially and away from the outer peripheral surface of the valve guide (16), the the detent spring (10) bearing against said outer annular shoulder (17) of the valve guide (16). Robinet selon la revendication 1, caractérisé en ce que le ressort de détente (10), le piston de détente (11), le ressort de soupape (20), le piston de soupape (21) et le guide de soupape (16) sont agencés coaxialement dans un logement à piston/soupape (3) aménagé dans le corps de robinet (2) et ouvert vers l'extérieur dudit corps de robinet (2).Valve according to Claim 1, characterized in that the relief spring (10), the relief piston (11), the valve spring (20), the valve piston (21) and the valve guide (16) are arranged coaxially in a piston/valve housing (3) arranged in the valve body (2) and open to the outside of said valve body (2). Robinet selon la revendication 8, caractérisé en ce qu'une cloche de réglage de détente (4) est fixée au corps (2) de robinet et forme un couvercle fermant le logement piston/soupape (3) aménagé dans le corps de robinet (2), le ressort de soupape (20) venant appuyer sur un fond borgne (4a) de ladite cloche de réglage de détente (4).Valve according to Claim 8, characterized in that an expansion adjustment bell (4) is fixed to the valve body (2) and forms a cover closing the piston/valve housing (3) arranged in the valve body (2 ), the valve spring (20) pressing against a blind bottom (4a) of said rebound adjustment bell (4). Robinet selon la revendication 9, caractérisé en ce que le fond borgne (4a) de la cloche de réglage de détente (4) comprend un ou plusieurs orifices (5) communiquant avec l'atmosphère extérieur.Valve according to Claim 9, characterized in that the blind bottom (4a) of the expansion adjustment bell (4) comprises one or more orifices (5) communicating with the outside atmosphere. Robinet selon la revendication 1, caractérisé en ce que le conduit de liaison (32) relie fluidiquement le circuit de gaz interne (33) au logement à piston/soupape (3).Valve according to Claim 1, characterized in that the connecting pipe (32) fluidically connects the internal gas circuit (33) to the piston/valve housing (3). Robinet selon la revendication 1, caractérisé en ce que le siège de clapet (34) est situé au débouché (36) du conduit de liaison (32) dans le corps (2) du robinet.Valve according to Claim 1, characterized in that the valve seat (34) is located at the outlet (36) of the connecting duct (32) in the body (2) of the valve. Robinet selon la revendication 12, caractérisé en ce que le siège de clapet (34) est aménagé périphériquement au débouché (36) du conduit de liaison (32)Valve according to Claim 12, characterized in that the valve seat (34) is arranged peripherally to the outlet (36) of the connecting duct (32) Récipient de gaz sous pression (60) comprenant un robinet à détendeur intégré (1) selon l'une des revendications précédentes, en particulier une bouteille de gaz.Pressurized gas container (60) with an integrated pressure reducing valve (1) according to one of the preceding claims, in particular a gas cylinder. Utilisation d'un récipient de gaz sous pression (60) équipé d'un RDI (1) selon la revendication 14 pour stocker un gaz ou un mélange gazeux choisi parmi oxygène, air, N2O/O2, He/O2, NO/azote, typiquement de l'oxygène.Use of a pressurized gas container (60) equipped with an RDI (1) according to claim 14 for storing a gas or a gaseous mixture chosen from oxygen, air, N 2 O/O 2 , He/O 2 , NO/nitrogen, typically oxygen.
EP21187358.3A 2020-09-28 2021-07-23 Valve for gas container with integrated regulator provided with a safety valve Pending EP3974700A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2009832A FR3114631B1 (en) 2020-09-28 2020-09-28 Valve for gas container with built-in regulator equipped with a safety valve

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EP3974700A1 true EP3974700A1 (en) 2022-03-30

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2212626A (en) 1938-03-28 1940-08-27 Phillips Petroleum Co Combined regulator and relief valve device
US4055198A (en) * 1974-08-15 1977-10-25 Tannetics, Inc. Excess pressure relieving valve
EP2770240A1 (en) 2013-02-26 2014-08-27 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Pressure reducer, valve and bottle comprising such a reducer
EP2918893A1 (en) 2014-03-12 2015-09-16 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Protective hood with pivoting attachment system for a gas cylinder
WO2017194429A1 (en) 2016-05-09 2017-11-16 Luxembourg Patent Company S.A. Compressed gas regulator with integrated pressure relief valve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2212626A (en) 1938-03-28 1940-08-27 Phillips Petroleum Co Combined regulator and relief valve device
US4055198A (en) * 1974-08-15 1977-10-25 Tannetics, Inc. Excess pressure relieving valve
EP2770240A1 (en) 2013-02-26 2014-08-27 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Pressure reducer, valve and bottle comprising such a reducer
EP2918893A1 (en) 2014-03-12 2015-09-16 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Protective hood with pivoting attachment system for a gas cylinder
WO2017194429A1 (en) 2016-05-09 2017-11-16 Luxembourg Patent Company S.A. Compressed gas regulator with integrated pressure relief valve

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FR3114631A1 (en) 2022-04-01
FR3114631B1 (en) 2023-04-14

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