EP3708899B1 - Valve, container for pressurised fluid and filling and extraction methods - Google Patents

Valve, container for pressurised fluid and filling and extraction methods Download PDF

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Publication number
EP3708899B1
EP3708899B1 EP20160563.1A EP20160563A EP3708899B1 EP 3708899 B1 EP3708899 B1 EP 3708899B1 EP 20160563 A EP20160563 A EP 20160563A EP 3708899 B1 EP3708899 B1 EP 3708899B1
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EP
European Patent Office
Prior art keywords
upstream
circuit
valve
valve shutter
downstream
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.)
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Application number
EP20160563.1A
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German (de)
French (fr)
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EP3708899A1 (en
Inventor
Antoine Frenal
Denis Muller
Hervé PAOLI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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Publication of EP3708899A1 publication Critical patent/EP3708899A1/en
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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
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • 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
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • 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
    • F17C2201/056—Small (<1 m3)
    • 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
    • F17C2205/03—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
    • 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
    • F17C2205/0326—Valves electrically actuated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0329—Valves manually actuated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0335—Check-valves or non-return 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
    • F17C2205/0382—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
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/04—Reducing risks and environmental impact
    • F17C2260/042—Reducing risk of explosion

Definitions

  • a valve, a pressurized fluid container, and methods of filling and withdrawing are disclosed.
  • the invention relates more particularly to a valve comprising a body delimiting an internal circuit for drawing off and possibly filling fluid, said internal circuit extending between an upstream end intended to be placed in connection with the storage volume of a reservoir and a downstream end intended to be connected with a user member drawing off or distributing pressurized fluid via the internal circuit, the valve comprising, arranged in series from upstream to downstream in the internal circuit between the upstream end and the downstream end: an upstream valve, an isolation valve and a dust protection valve, the dust protection valve being movable relative to the body between a closed position of the upstream end of the circuit at least two distinct open positions, in the closed position of the dust protection valve, the isolation valve and the upstream valve being in respective closed positions of the circuit, in at least two positions respective ions for opening the dust-proof valve, either only the isolation valve being in an open position of the circuit or, respectively, or the isolation valve and the upstream valve being in open positions of
  • Abrupt opening of a high pressure fluid reservoir valve can generate dangerous pressure rises (risk of deterioration and / or ejection of downstream systems and risk of fire, particularly in the case of oxygen).
  • An object of the present invention is to overcome all or part of the drawbacks of the prior art noted above.
  • the valve according to the invention is essentially characterized in that the valve comprises a calibrated orifice defining a determined opening allowing a passage of gas between upstream and downstream of the upstream valve when the latter is in its circuit closed position, said determined opening of the calibrated orifice being less than the opening produced when the upstream valve is in its circuit open position .
  • the invention also relates to a pressurized fluid container, in particular a pressurized gas cylinder or assembly of cylinders, comprising a valve conforming to any one of the characteristics above or below.
  • the invention also relates to a method of filling such a container with pressurized fluid by means of a conditioning outlet mechanically connected to the body of the valve in a removable manner, the method comprising a step of moving the dust-proof valve of the valve. 'upstream to downstream in a determined downstream position called “filling" opening the downstream end of the circuit, in which the dust-proof valve pushes a downstream end of the movable isolation valve and moves the valve to an upstream position opening of the circuit, the upstream valve is also moved to an open position of the upstream end of the circuit to allow the transfer of fluid from downstream to upstream in the container.
  • the invention also relates to a method for withdrawing pressurized fluid from such a pressurized fluid container by means of a conditioning outlet mechanically connected to the body of the valve in a removable manner, the method comprising a first step of moving the dust-proof valve from downstream to upstream in a first open position opening the downstream end of the circuit, in which the dust-proof valve pushes the movable isolation valve to move the isolation valve by contact to an open position of the circuit in which the isolation valve does not push the upstream valve, to allow the withdrawal of fluid in the circuit from upstream to downstream through the calibrated orifice.
  • the invention may also relate to any alternative device or method comprising any combination of the characteristics above or below within the scope of the claims.
  • the internal circuit 3 extends between a downstream end 6 intended to be connected with a user member drawing off or distributing pressurized fluid via the internal circuit 3 and an upstream end 5 intended to be connected with the storage volume of one or more reservoirs 40 of pressurized fluid.
  • the internal circuit 3 extends along a longitudinal axis.
  • body 2 preferably extends along a longitudinal axis and has a generally oblong shape, for example cylindrical.
  • the valve 1 comprises, arranged in series in the internal circuit 3 of the downstream 6 upstream, a dust-barrier valve 8, an isolation valve 7 and an upstream valve 11.
  • Each valve preferably comprises a respective movable shutter relative to a respective seat 9, 15.
  • each movable shutter can be biased by a respective return member 14, 10, 12 such as a spring towards a closed position of the circuit. 3 internal.
  • the isolation valve 7 is movable in translation relative to its seat 9 between a downstream closed position of the circuit 3 and at least one upstream open position of the circuit 3.
  • the isolation valve 7 is biased towards its position. downstream by a return member 10 such as a spring.
  • the dust-proof valve 8 comprises an upstream end 108 and is disposed downstream of the isolation valve 7.
  • the dust-barrier valve 8 is movable relative to the body 2 between a downstream closed position of the downstream end of the circuit 3 and at least one upstream open position of the downstream end of the circuit 3.
  • the dust-barrier valve 8 is biased towards its downstream position by a return member 14 such as a spring.
  • the valve 1 comprises a calibrated orifice 4 defining a determined opening allowing a passage of gas between the upstream and downstream of the upstream valve 11 when the latter is in its position for closing the circuit 3.
  • This determined opening of the calibrated orifice 4 is however less than the opening produced when the upstream valve 11 is in its open position of the circuit 3.
  • the dust-barrier valve 8 can be moved from its downstream closed position to a first determined upstream position called “contactless” opening the downstream end of the circuit 3, in which the upstream end 108 of the dust-barrier valve 8 does not push.
  • isolation valve 7 no contact with isolation valve 7) cf. [ Fig. 2 ].
  • This position can be obtained for example by connecting to the downstream end of the body 2 of the valve 1 a tool 123 for filling and / or withdrawing.
  • the tool 123 comprises a member 23 pushing the movable valve which slightly moves the valve 8 by dust from downstream to upstream.
  • the valve pusher 23 can be moved for example via a pivoting lever which can be actuated manually, hydraulically, pneumatically, electrically or by any other suitable actuator.
  • This contactless position has many advantages.
  • this configuration in which only the dust-proof valve 8 is open makes it possible to connect a filling and / or withdrawal tool in a sealed manner to the downstream end of the valve 2 with a constant force whatever the pressure level in upstream of the isolation valve 7.
  • the pressure upstream of the dust-barrier valve 8 may be the same as the outside of the valve (ambient atmospheric pressure), in particular when the dust-proof valve 8 closes the downstream end 6 of circuit 3 in a leaky manner.
  • this contactless configuration also allows a filling / withdrawing tool to perform leak testing of the isolation valve 7.
  • the filling / withdrawing tool is connected in a sealed manner to the end 6 of the valve and can be configured to create a vacuum (depression) in the downstream part of the circuit 3 (downstream of the isolation valve 7). This makes it possible to carry out one or more tests to check / qualify the level of tightness of the valve 7 and of the tool, for example before subjecting the mechanism to high pressures.
  • the dust-barrier valve 8 is movable further upstream in a second determined upstream position called "contact" opening the downstream end 6 of the circuit 3 and in which the upstream end 108 of the dust-barrier valve 8 pushes. a downstream end of the isolation valve 7.
  • the isolation valve 7 is then moved by contact out of its seat 9 to a first upstream opening position of the circuit 3 in which the isolation valve 7 does not push the third upstream valve 11 (cf. [ Fig. 3 ]).
  • the pressurized fluid can escape towards the downstream end according to the flow rate imposed by the calibrated orifice 4.
  • the first two valves 8, 7 are opened mechanically while the third upstream valve 11 is in the closed position, but a calibrated flow rate can still escape.
  • This configuration corresponds to a start of withdrawal via a progressive opening of the circuit making it possible to control a gradual rise in pressure downstream (circulation of fluid shown diagrammatically by an arrow at the [ Fig. 3 ]).
  • the dust-barrier valve 8 can be moved even further upstream in a third determined upstream position opening the circuit 3.
  • the upstream end 108 of the dust-barrier valve 8 pushes a downstream end of the valve 7 of movable isolation to move by contact the isolation valve 7 out of its seat 9 to a second upstream opening position of the circuit 3.
  • the isolation valve 7 pushes the upstream valve 11 into an open position complete of the upstream end of the circuit 3. That is to say that, in this case, the three valves 8, 7, 11 are completely open allowing maximum circulation of fluid.
  • This configuration corresponds to a state of filling or drawing off of a reservoir 40 through the tap 1 (cf. [ Fig. 4 ] where a two-way arrow symbolizes the case of filling or drawing off).
  • the anti-return mechanism may include a mechanism of the same type as that described in the document FR3033386A .
  • Fig. 5 illustrates in more detail a possible and non-limiting embodiment of a valve.
  • the valve 1 has a body 2 of essentially or predominantly cylindrical shape.
  • a first zone of the body 2 (downstream side 6) comprises a cylindrical portion defining on the outer surface of the body 2 one or more grooves 19 and / or one or more ribs 20.
  • This portion 18 forms an imprint determined to cooperate in mechanical attachment with a determined conjugate attachment member (claw (s) and / or ball system or other ...) of a conditioning member 123 (cf. for example figure 2 ).
  • This portion thus allows keying or decoding between the valve 1 (and therefore the gas from the reservoir to which it is linked) the corresponding withdrawal or filling module 123.
  • the body 2 can preferably comprise a zone intended to cooperate with an assembly tool (for example a key) on a reservoir.
  • This interface preferably has several sides and is for example hexagonal for cooperation with a tightening tool and capable of withstanding the tightening torque necessary for the body to be properly held on a reservoir.
  • the body 2 may include a threaded zone 22 for connecting the valve 1 in the thread of a gas cylinder 40 for example.
  • the body 2 comprises an internal central longitudinal channel forming the internal circuit 3.
  • the dust barrier valve 8 located at the downstream end 6 of the circuit 3 is preferably a sealed valve, for example via a seal carried by the movable valve 8 and cooperating with the fixed peripheral part of the body 2.
  • the dust-proof valve 8 is flush (is located in the same plane as the downstream end 6 of the body 2) in the closed position. In this way, the risk of collecting water, dust or dirt is avoided or at least reduced thanks to the dust cover 8.
  • the isolation valve 8 may include a central end 108 projecting upstream and allowing cooperation with the adjacent isolation valve 7. For example, this end 108 can cooperate with a downstream end 13 of the isolation valve 7.
  • the return member 10 of the isolation valve 7 can be mounted around a part of this valve 7.
  • the upstream valve 11 is urged against a seat 15 by a return member 12.
  • the valve has a calibrated orifice which allows a limited passage of gas on either side of the upstream valve 11 even when the latter is in the closed position.
  • the calibrated orifice 4 delimits an opening having a first determined section S1 while the opening produced when the upstream valve 11 is in its open position of the circuit 3 has a second determined section S2 so that the ratio between the first section S1 and the second section S2 is between 1/100 and 1/20 and preferably 1/80 and 1/30.
  • the passage (first opening section S1) of the calibrated orifice can be obtained by altering the sealing line between the upstream valve 11 and its seat 15 by broaching, a saw cut or other tool on the valve or on his seat.
  • the valve 11 may not be perfectly cylindrical (faceted ball, porous ball, or of any other shape to allow the gas to pass with a limited flow rate).
  • Another alternative or cumulative solution is to place a calibrated orifice in parallel with this upstream valve 11, to ensure the limited passage of gas.
  • this calibrated orifice can pass through the body of the upstream valve 11.
  • a filling / withdrawing tool can be mechanically connected to the downstream end of the valve.
  • a mechanical retention and an external seal can be achieved between the tool and the valve 1.
  • the upstream valve 11 can be opened for maximum flow.
  • This sequence can be used for filling as well as for drawing off.
  • the stroke of the valve (s), the length of the gas pipe and the calibrated limiting flow rate can be adapted to promote a gradual rise in pressure of the system during opening.
  • the operating element (lever or other) of the valve pusher 23 of the tool can be configured to sequence these different steps (partial or complete opening of circuit 3).
  • the dust barrier valve 8 can form a residual pressure valve maintaining a minimum pressure in the circuit when it is in the closed position.
  • the dust-proof valve 8 itself and / or a seal that it carries and / or a seal of the valve body with which it cooperates is deformable in order to evacuate excess pressure in the circuit to the outside.
  • a determined threshold for example above 200mbar and up to 10bar or more in particular 15bar or 20 bar or more, in particular between 200mbar and six to eight bar, for example 1 to 6bar
  • the residual pressure valve maintains a pressure in the circuit above atmospheric pressure when the dust cover 8 is in the closed position.
  • This provides the advantage of maintaining a residual pressure in the valve regardless of the steps of connection to the valve.
  • this makes it possible to perform a residual pressure maintenance function that does not present a hissing problem or risk of non-reclosing by the absence of dynamic sealing with a valve opening member.
  • this allows a self-regulated residual pressure to be maintained, the maximum value of which does not degrade the ergonomics of the connection (residual pressure multiplied by the bearing surface being less than the necessary connection force).
  • An advantage of keeping the residual pressure is that it prevents any risk of ingress of pollution coming from the outside in addition to the protection generated by the seal 28 and valve 8 itself.
  • the dust-proof valve 8 may include a movable piston equipped with a groove accommodating an annular seal 28 in contact with a bore in which the piston slides. In the storage position, the piston is held in the high position by means of a return member such as a spring 14.
  • the seal 28 could of course be overmolded and / or vulcanized on the piston.
  • the dust barrier valve 8 comprises a peripheral O-ring 28 forming a lip which comes to rest in a sealed manner on the circular edge of the orifice formed in the body 2 of the valve.
  • the lip faces upwards (towards the outlet of tap 2).
  • the contact between the gasket 28 of the dust barrier 8 and the bore delimiting its passage opening provides a gas seal which ensures that the upstream chamber of the dust barrier 8 is not vented.
  • the seal 28 may deform under the effect of the pressure inside (upstream of the dust barrier 8) so as to expel the excess pressure to the outside.
  • the dust-proof valve 8 is in the closed position but ensuring an evacuation of excess gas to the outside of the valve 1 (storage position with pressure evacuation).
  • the end of the seal 28 is pushed back by the excess upstream pressure, the seal is broken to allow only the gas to escape.
  • the seal returns to its sealed closed position previously described.
  • this measured opening is only possible in the direction of discharge and under certain pressure differential conditions between the interior (between the upstream side of the dust barrier 8) and the exterior.
  • the seal 28 is sufficiently elastic to return to its initial position after having released the excess pressure, which makes it possible to recover the gas tightness.
  • the pressure gradient between the gas contained in the chamber and the outside ensures that the volume of the chamber is not contaminated in the ambient air.
  • the dust-proof valve 8 is pushed upstream (towards the inside of the valve 2) by a valve pusher pin 23 which may include a peripheral seal 123 ensuring a seal with the valve circuit at the level of the inlet port.
  • the dust-proof valve 8 can still have a seal with the body 2 of the valve.
  • the gasket 28 of the dust cover 8 can be positioned on the piston so that the contact between the gasket 28 of the dust cover 8 and the bore is not broken only after tight contact is established between the seal 23 of the shaft 123 and the valve bore.
  • the connection of a member carrying the valve pusher 23 on the valve does not release the volume of gas in the chamber located upstream of the dust valve 8 to air.
  • a module (valve or other) is connected in a sealed manner at the level of the downstream end 6 and this module is equipped with a residual pressure valve (RPV) function, then there is a positive pressure in the connections even after purging the downstream circuit.
  • RSV residual pressure valve
  • the above sequence makes it possible to guarantee simultaneous sealing of the two seals (28 and 123.
  • This architecture makes it possible to maintain a positive pressure in the chamber upstream of the dust-barrier valve 8 as soon as the module is disconnected. It is not need to wait for a "natural leak" from the isolation valve 7 to take advantage of this originality.
  • the position of the piston of the dust barrier valve 8, the stroke of the valve pusher 23 present in the valve 1 and the position of the various seals (28 and 123) are preferably such that the seal 28 of the valve 8 protects dust is never in contact with the bore delimiting the orifice or with the valve body. This makes it possible to avoid trapping gas under pressure.
  • the gas When gas is withdrawn (from upstream to downstream) the gas can flow downstream from the dust-barrier valve 8, for example by means of one or more orifices present in or around the valve pusher 23 or any other suitable part.
  • orifices can be provided radially in particular in the case where the opening / closing function is activated independently.
  • a bore coaxial with the valve pusher axis 23 may be provided for the transit of gas.
  • the reverse movement occurs in the direction of closure.
  • the seal 28 of the dust shield 8 and the seal 123 of the shaft 23 can be positioned such that the contact between the seal 28 of the dust shield 8 and the bore 2 is established before the sealed contact between the seal 123 of the valve pusher shaft 23 and the bore of the dust cover is not lost. This also makes it possible to avoid contaminating the circuit upstream of the dust-proof valve 8.
  • the residual pressure valve function is therefore present on the first valve 2 thanks to the dust barrier valve 8 as described below. above.
  • the residual pressure valve function can be performed by another valve. residual pressure which is housed in the second valve in fluid relationship with the circuit of the first valve. This makes it possible to avoid the resonance of an oscillator in the system.

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

Description

L'invention concerne un robinet, un récipient de fluide sous pression et des procédés de remplissage et de soutirage. L'invention concerne plus particulièrement un robinet comprenant un corps délimitant un circuit interne de soutirage et éventuellement de remplissage de fluide, ledit circuit interne s'étendant entre une extrémité amont destinée à être mise en relation avec le volume de stockage d'un réservoir et une extrémité aval destinée à être reliée avec un organe utilisateur soutirant ou distribuant du fluide sous pression via le circuit interne, le robinet comprenant, disposés en série de l'amont vers l'aval dans le circuit interne entre l'extrémité amont et l'extrémité aval: un clapet amont, un clapet d'isolement et un clapet pare-poussière, le clapet pare-poussière étant mobile relativement au corps entre une position de fermeture de l'extrémité amont du circuit au moins deux positions distinctes d'ouverture, dans la position de fermeture du clapet pare-poussière, le clapet d'isolement et le clapet amont étant dans des positions respectives de fermeture du circuit, dans les au moins deux positions respectives distinctes d'ouverture du clapet pare-poussière, soit uniquement le clapet d'isolement étant dans une position d'ouverture du circuit ou, respectivement, soit le clapet d'isolement et le clapet amont étant dans des positions d'ouverture du circuit.A valve, a pressurized fluid container, and methods of filling and withdrawing are disclosed. The invention relates more particularly to a valve comprising a body delimiting an internal circuit for drawing off and possibly filling fluid, said internal circuit extending between an upstream end intended to be placed in connection with the storage volume of a reservoir and a downstream end intended to be connected with a user member drawing off or distributing pressurized fluid via the internal circuit, the valve comprising, arranged in series from upstream to downstream in the internal circuit between the upstream end and the downstream end: an upstream valve, an isolation valve and a dust protection valve, the dust protection valve being movable relative to the body between a closed position of the upstream end of the circuit at least two distinct open positions, in the closed position of the dust protection valve, the isolation valve and the upstream valve being in respective closed positions of the circuit, in at least two positions respective ions for opening the dust-proof valve, either only the isolation valve being in an open position of the circuit or, respectively, or the isolation valve and the upstream valve being in open positions of the circuit. circuit.

On connait des robinets à multiples clapets en série (cf. par exemple FR2962519A ou FR3033386A ).We know valves with multiple valves in series (cf. for example FR2962519A Where FR3033386A ).

Une ouverture brutale d'un robinet de réservoir de fluide à haute pression peut générer des montées de pressions dangereuses (risques de détérioration et/ou d'éjection des systèmes avals et risque d'incendie pour le cas notamment de l'oxygène).Abrupt opening of a high pressure fluid reservoir valve can generate dangerous pressure rises (risk of deterioration and / or ejection of downstream systems and risk of fire, particularly in the case of oxygen).

Des systèmes de limitation de débit sont connus mais difficilement compatibles avec une architecture complexe à plusieurs clapets nécessitant de pouvoir autoriser de forts débits (remplissage et/ou soutirage).Flow-limiting systems are known but are not easily compatible with a complex architecture to several valves requiring the ability to authorize high flow rates (filling and / or drawing off).

Un but de la présente invention est de pallier tout ou partie des inconvénients de l'art antérieur relevés ci-dessus.An object of the present invention is to overcome all or part of the drawbacks of the prior art noted above.

A cette fin, le robinet selon l'invention, par ailleurs conforme à la définition générique qu'en donne le préambule ci-dessus, est essentiellement caractérisé en ce que le robinet comprend un orifice calibré définissant une ouverture déterminée autorisant un passage de gaz entre l'amont et l'aval du clapet amont lorsque ce dernier est dans sa position de fermeture du circuit, ladite ouverture déterminée de l'orifice calibré étant inférieure à l'ouverture produite lorsque le clapet amont est dans sa position d'ouverture du circuit.To this end, the valve according to the invention, moreover in accordance with the generic definition given in the preamble above, is essentially characterized in that the valve comprises a calibrated orifice defining a determined opening allowing a passage of gas between upstream and downstream of the upstream valve when the latter is in its circuit closed position, said determined opening of the calibrated orifice being less than the opening produced when the upstream valve is in its circuit open position .

Cette architecture permet de prévoir un système de limitation de débit en amont du clapet d'isolation principal avec la possibilité de son inhibition pour permettre un débit maximal. Par ailleurs, des modes de réalisation de l'invention peuvent comporter l'une ou plusieurs des caractéristiques suivantes :

  • l'orifice calibrĂ© dĂ©limite une ouverture ayant une première section dĂ©terminĂ©e tandis que l'ouverture produite lorsque le clapet amont est dans sa position d'ouverture du circuit a une seconde section dĂ©terminĂ©e, le rapport entre la première section et la seconde section Ă©tant compris entre 1/100 et 1/20 et de prĂ©fĂ©rence 1/80 et 1/30,
  • le clapet d'isolement est mobile relativement Ă  un siège entre une position aval de fermeture du circuit et au moins une position amont d'ouverture du circuit, ledit clapet d'isolement Ă©tant sollicitĂ© vers sa position aval par un organe de rappel, le clapet pare-poussière comprenant une extrĂ©mitĂ© amont et Ă©tant mobile relativement au corps entre une position aval de fermeture de l'extrĂ©mitĂ© amont du circuit et au moins une position amont d'ouverture de l'extrĂ©mitĂ© aval du circuit, ledit clapet pare-poussière Ă©tant sollicitĂ© vers sa position aval par un organe de rappel, le clapet amont Ă©tant mobile relativement Ă  un siège entre une position aval de fermeture du circuit et au moins une position amont d'ouverture du circuit, le clapet amont Ă©tant sollicitĂ© vers sa position aval de fermeture par un organe de rappel,
  • le clapet pare-poussière est dĂ©plaçable de sa position aval de fermeture vers: une première position amont dĂ©terminĂ©e dite « sans contact » ouvrant l'extrĂ©mitĂ© aval du circuit, dans laquelle l'extrĂ©mitĂ© aval du clapet pare-poussière ne pousse pas le clapet d'isolement, ou, une seconde position amont dĂ©terminĂ©e dite « de contact » ouvrant l'extrĂ©mitĂ© aval du circuit, dans laquelle l'extrĂ©mitĂ© amont du clapet pare-poussière vient pousser une extrĂ©mitĂ© aval du clapet d'isolement mobile pour dĂ©placer par contact le clapet d'isolement hors de son siège vers une première position amont d'ouverture du circuit dans laquelle le clapet d'isolement ne pousse pas le clapet amont, ou, une troisième position amont dĂ©terminĂ©e ouvrant l'extrĂ©mitĂ© aval du circuit, dans laquelle l'extrĂ©mitĂ© amont du clapet pare-poussière vient pousser une extrĂ©mitĂ© aval du clape d'isolement mobile pour dĂ©placer le clapet d'isolement hors de son siège vers une seconde position amont d'ouverture du circuit dans laquelle le clapet d'isolement pousse le clapet amont dans sa position d'ouverture de l'extrĂ©mitĂ© amont du circuit,
  • l'orifice calibrĂ© est dĂ©limitĂ© au moins en partie par le clapet amont ou un Ă©lĂ©ment de ce dernier,
  • l'orifice calibrĂ© est logĂ© dans le clapet amont,
  • l'orifice calibrĂ© comprend une obturateur telle qu'une bille poussĂ© vers un siège par un organe de rappel, l'obturateur Ă©tant en appui non Ă©tanche sur le siège,
  • le clapet pare-poussière est un clapet de pression rĂ©siduel maintenant une pression minimale dans le circuit lorsqu'il est en position fermĂ©e et permettant une Ă©vacuation de gaz en cas de surpression dans le circuit au-dessus d'un seuil de pression dĂ©terminĂ©,
  • le robinet comprend un joint dĂ©formable situĂ© sur le clapet pare-poussière et/ou sur le corps apte et configurĂ© pour Ă©vacuer vers l'extĂ©rieur un excès de pression dans le circuit au-dessus d'un seuil dĂ©terminĂ© qui mais reste en position fermĂ©e et Ă©tanche lorsque la pression dans le circuit est infĂ©rieure Ă  ce seuil.
This architecture makes it possible to provide a flow limitation system upstream of the main isolation valve with the possibility of its inhibition to allow maximum flow. Furthermore, embodiments of the invention may include one or more of the following characteristics:
  • the calibrated orifice delimits an opening having a first determined section while the opening produced when the upstream valve is in its open position of the circuit has a second determined section, the ratio between the first section and the second section being between 1/100 and 1/20 and preferably 1/80 and 1/30,
  • the isolation valve is movable relative to a seat between a downstream closed position of the circuit and at least one upstream open position of the circuit, said isolation valve being biased towards its downstream position by a return member, the valve dust cover comprising an upstream end and being movable relative to the body between a downstream closed position of the upstream end of the circuit and at least one upstream open position of the downstream end of the circuit, said dust cover valve being biased towards its downstream position by a return member, the upstream valve being movable relative to a seat between a downstream closed position of the circuit and at least one upstream open position of the circuit, the upstream valve being biased towards its downstream closed position by a return member,
  • the dust-proof valve can be moved from its downstream closed position to: a first determined upstream position called "contactless" opening the downstream end of the circuit, in which the downstream end of the dust-proof valve does not push the valve d 'isolation, or, a second determined upstream position called "contact" opening the downstream end of the circuit, in which the upstream end of the dust-proof valve pushes a downstream end of the movable isolation valve to move by contact the isolation valve out of its seat towards a first upstream opening position of the circuit in which the isolation valve does not push the upstream valve, or, a third determined upstream position opening the downstream end of the circuit, in which the 'the upstream end of the dust-proof valve pushes a downstream end of the movable isolation valve to move the isolation valve out of its seat towards a second upstream opening position of the circuit in which the The isolation valve pushes the upstream valve into its open position at the upstream end of the circuit,
  • the calibrated orifice is delimited at least in part by the upstream valve or an element thereof,
  • the calibrated orifice is housed in the upstream valve,
  • the calibrated orifice comprises a shutter such as a ball pushed towards a seat by a return member, the shutter resting non-tightly on the seat,
  • the dust protection valve is a residual pressure valve that maintains a minimum pressure in the circuit when it is in the closed position and allows gas to be evacuated in the event of overpressure in the circuit above a determined pressure threshold,
  • the valve comprises a deformable seal located on the dust-proof valve and / or on the suitable body and configured to evacuate to the outside an excess of pressure in the circuit above a determined threshold which but remains in the closed position and sealed when the pressure in the circuit is below this threshold.

L'invention concerne également un récipient de fluide sous pression, en particulier bouteille ou ensemble de bouteilles de gaz sous pression, comprenant un robinet conforme à l'une quelconque des caractéristiques ci-dessus ou ci-dessous.The invention also relates to a pressurized fluid container, in particular a pressurized gas cylinder or assembly of cylinders, comprising a valve conforming to any one of the characteristics above or below.

L'invention concerne également un procédé de remplissage d'un tel récipient de fluide sous pression au moyen d'une prise de conditionnement connectée mécaniquement au corps du robinet de façon amovible, le procédé comportant une étape de déplacement du clapet pare-poussière de l'amont vers l'aval dans une position aval déterminée dite « de remplissage» ouvrant l'extrémité aval du circuit, dans laquelle le clapet pare-poussière vient pousser une extrémité aval du clapet d'isolement mobile et déplace le clapet vers une position amont d'ouverture du circuit, le clapet amont est également déplacé dans une position d'ouverture de l'extrémité amont du circuit pour autoriser le transfert de fluide d'aval vers l'amont dans le récipient.The invention also relates to a method of filling such a container with pressurized fluid by means of a conditioning outlet mechanically connected to the body of the valve in a removable manner, the method comprising a step of moving the dust-proof valve of the valve. 'upstream to downstream in a determined downstream position called "filling" opening the downstream end of the circuit, in which the dust-proof valve pushes a downstream end of the movable isolation valve and moves the valve to an upstream position opening of the circuit, the upstream valve is also moved to an open position of the upstream end of the circuit to allow the transfer of fluid from downstream to upstream in the container.

Selon d'autres particularités possibles :

  • dans sa position amont dite « de remplissage» le clapet pare-poussière vient pousser une extrĂ©mitĂ© aval du clapet d'isolement mobile et dĂ©place par contact le clapet d'isolement dans une position dĂ©terminĂ©e d'ouverture dans laquelle le clapet d'isolement pousse Ă  son tour le clapet amont dans une position d'ouverture de l'extrĂ©mitĂ© aval du circuit pour autoriser le transfert de fluide d'aval vers l'amont dans le rĂ©cipient,
  • le clapet pare-poussière est dĂ©placĂ© vers l'amont par une action mĂ©canique d'une extrĂ©mitĂ© d'un pousse-clapet mobile appartenant Ă  la prise de conditionnement.
According to other possible features:
  • in its so-called “filling” upstream position, the dust-proof valve pushes a downstream end of the movable isolation valve and moves the isolation valve by contact to a determined open position in which the isolation valve pushes to the upstream valve in turn in an open position of the downstream end of the circuit to allow the transfer of fluid from downstream to upstream in the container,
  • the dust-proof valve is moved upstream by a mechanical action of one end of a movable valve pusher belonging to the packaging outlet.

L'invention concerne également un procédé de soutirage de fluide sous pression d'un tel récipient de fluide sous pression au moyen d'une prise de conditionnement connectée mécaniquement au corps du robinet de façon amovible, le procédé comportant une première étape de déplacement du clapet pare-poussière de l'aval vers l'amont dans une première position d'ouverture ouvrant l'extrémité aval du circuit, dans laquelle le clapet pare-poussière vient pousser le clapet d'isolement mobile pour déplacer par contact le clapet d'isolement vers une position d'ouverture du circuit dans laquelle le clapet d'isolement ne pousse pas le clapet amont, pour permettre le soutirage de fluide dans le circuit de l'amont vers l'aval au travers de l'orifice calibré.The invention also relates to a method for withdrawing pressurized fluid from such a pressurized fluid container by means of a conditioning outlet mechanically connected to the body of the valve in a removable manner, the method comprising a first step of moving the dust-proof valve from downstream to upstream in a first open position opening the downstream end of the circuit, in which the dust-proof valve pushes the movable isolation valve to move the isolation valve by contact to an open position of the circuit in which the isolation valve does not push the upstream valve, to allow the withdrawal of fluid in the circuit from upstream to downstream through the calibrated orifice.

Selon d'autres particularités possibles :

  • le procĂ©dĂ© comporte une seconde Ă©tape de dĂ©placement du clapet pare-poussière de l'aval vers l'amont dans une seconde position d'ouverture ouvrant l'extrĂ©mitĂ© aval du circuit, dans laquelle le clapet pare-poussière vient pousser le clapet d'isolement mobile pour dĂ©placer le clapet d'isolement vers une position d'ouverture du circuit dans laquelle le clapet d'isolement pousse le clapet amont dans sa position d'ouverture, pour permettre le soutirage de fluide dans le circuit de l'amont vers l'aval sans ĂŞtre limitĂ© Ă  l'ouverture de l'orifice calibrĂ©,
  • la première et la seconde Ă©tape de dĂ©placement du clapet pare-poussière de l'aval vers l'amont dans respectivement les première et seconde position d'ouverture sont rĂ©alisĂ©es sĂ©quentiellement pour assurer une ouverture progressive du circuit
According to other possible features:
  • the method comprises a second step of moving the dust-proof valve from downstream to upstream in a second open position opening the downstream end of the circuit, in which the dust-proof valve pushes the isolation valve movable to move the isolation valve to an open position of the circuit in which the isolation valve pushes the upstream valve into its open position, to allow the withdrawal of fluid in the circuit from upstream to downstream without being limited to the opening of the calibrated orifice,
  • the first and the second step of moving the dust-proof valve from downstream to upstream in the first and second opening positions, respectively, are carried out sequentially to ensure progressive opening of the circuit

L'invention peut concerner également tout dispositif ou procédé alternatif comprenant toute combinaison des caractéristiques ci-dessus ou ci-dessous dans le cadre des revendications.The invention may also relate to any alternative device or method comprising any combination of the characteristics above or below within the scope of the claims.

D'autres particularités et avantages apparaîtront à la lecture de la description ci-après, faite en référence aux figures dans lesquelles :

  • [Fig. 1] reprĂ©sente une vue en coupe, schĂ©matique et partielle, illustrant la structure d'un robinet montĂ© sur un rĂ©servoir selon un exemple de rĂ©alisation de l'invention dans une première configuration fermĂ©e (trois clapets fermĂ©s),
  • [Fig. 2] reprĂ©sente le robinet de la [Fig. 1] raccordĂ© Ă  un outil de conditionnement muni d'un organe d'actionnement et dans une seconde configuration (ouverture du clapet pare-poussière seulement),
  • [Fig. 3] reprĂ©sente l'ensemble de la [Fig. 2] dans une troisième configuration (ouverture de deux clapets tandis que le troisième est fermĂ© mais le circuit est partiellement ouvert via un orifice calibrĂ©),
  • [Fig. 4] reprĂ©sente l'ensemble de la [Fig. 2] dans une quatrième configuration (ouverture complète des trois clapets),
  • [Fig. 5] reprĂ©sente une vue en coupe, schĂ©matique et partielle, illustrant un exemple de structure d'un robinet dans la configuration de la [Fig. 1],
  • [Fig. 6] reprĂ©sente une vue en coupe, schĂ©matique et partielle, d'un dĂ©tail d'un robinet illustrant une rĂ©alisation possible d'un clapet pare-poussière dans une première configuration fermĂ©e,
  • [Fig. 7] reprĂ©sente une vue similaire Ă  celle de [Fig. 6] dans laquelle le clapet pare-poussière est dans une seconde configuration fermĂ©e mais assurant une rĂ©gulation de pression,
  • [Fig. 8] reprĂ©sente une vue similaire Ă  celle de [Fig. 6] dans laquelle le clapet pare-poussière est dĂ©placĂ© de sa première configuration fermĂ©e vers une configuration ouverte via un axe pousse-clapet,
  • [Fig. 9] reprĂ©sente une vue similaire Ă  celle de [Fig. 8] dans laquelle le clapet pare-poussière est dans une configuration ouverte sous l'action de l'axe pousse-clapet,
En se référant aux figures 1 et 5, le robinet 1 comprend un corps 2 délimitant un circuit 3 interne de remplissage et de soutirage de fluide.Other features and advantages will become apparent on reading the description below, given with reference to the figures in which:
  • [ Fig. 1 ] is a sectional view, schematic and partial, illustrating the structure of a valve mounted on a tank according to an exemplary embodiment of the invention in a first closed configuration (three closed valves),
  • [ Fig. 2 ] represents the tap of the [ Fig. 1 ] connected to a conditioning tool fitted with an actuator and in a second configuration (opening of the dust cover only),
  • [ Fig. 3 ] represents the set of [ Fig. 2 ] in a third configuration (opening of two valves while the third is closed but the circuit is partially open via a calibrated orifice),
  • [ Fig. 4 ] represents the set of [ Fig. 2 ] in a fourth configuration (full opening of the three valves),
  • [ Fig. 5 ] is a sectional view, schematic and partial, illustrating an example of the structure of a valve in the configuration of the [ Fig. 1 ],
  • [ Fig. 6 ] shows a sectional view, schematic and partial, of a detail of a valve illustrating a possible embodiment of a dust protection valve in a first closed configuration,
  • [ Fig. 7 ] represents a view similar to that of [ Fig. 6 ] in which the dust-proof valve is in a second closed configuration but providing pressure regulation,
  • [ Fig. 8 ] represents a view similar to that of [ Fig. 6 ] in which the dust cover is moved from its first closed configuration to an open configuration via a valve pusher axis,
  • [ Fig. 9 ] represents a view similar to that of [ Fig. 8 ] in which the dust protection valve is in an open configuration under the action of the valve pusher shaft,
With reference to figures 1 and 5 , the valve 1 comprises a body 2 defining an internal circuit 3 for filling and withdrawing fluid.

Le circuit 3 interne s'étend entre une extrémité aval 6 destinée à être reliée avec un organe utilisateur soutirant ou distribuant du fluide sous pression via le circuit 3 interne et une extrémité amont 5 destinée à être mise en relation avec le volume de stockage d'un ou plusieurs réservoirs 40 de fluide sous pression.The internal circuit 3 extends between a downstream end 6 intended to be connected with a user member drawing off or distributing pressurized fluid via the internal circuit 3 and an upstream end 5 intended to be connected with the storage volume of one or more reservoirs 40 of pressurized fluid.

De préférence, le circuit 3 interne s'étend selon un axe longitudinal. De même le corps 2 s'étend de préférence selon un axe longitudinal et a une forme générale oblongue, par exemple cylindrique.Preferably, the internal circuit 3 extends along a longitudinal axis. Likewise, body 2 preferably extends along a longitudinal axis and has a generally oblong shape, for example cylindrical.

Le robinet 1 comprend, disposés en série dans le circuit 3 interne de l'aval 6 vers l'amont, un clapet 8 pare-poussière, un clapet 7 d'isolement et un clapet 11 amont.The valve 1 comprises, arranged in series in the internal circuit 3 of the downstream 6 upstream, a dust-barrier valve 8, an isolation valve 7 and an upstream valve 11.

Chaque clapet comprend de préférence un obturateur respectif mobile relativement à un siège respectif 9, 15. De plus, chaque obturateur mobile peut être sollicité par un organe de rappel respectif 14, 10, 12 tel qu'un ressort vers une position de fermeture du circuit 3 interne.Each valve preferably comprises a respective movable shutter relative to a respective seat 9, 15. In addition, each movable shutter can be biased by a respective return member 14, 10, 12 such as a spring towards a closed position of the circuit. 3 internal.

Ainsi, le clapet 7 d'isolement est mobile en translation relativement à son siège 9 entre une position aval de fermeture du circuit 3 et au moins une position amont d'ouverture du circuit 3. Le clapet 7 d'isolement est sollicité vers sa position aval par un organe 10 de rappel tel qu'un ressort.Thus, the isolation valve 7 is movable in translation relative to its seat 9 between a downstream closed position of the circuit 3 and at least one upstream open position of the circuit 3. The isolation valve 7 is biased towards its position. downstream by a return member 10 such as a spring.

Le clapet 8 pare-poussière comprend une extrémité amont 108 et est disposé en aval du clapet 7 d'isolement. Le clapet 8 pare-poussière est mobile relativement au corps 2 entre une position aval de fermeture de l'extrémité aval du circuit 3 et au moins une position amont d'ouverture de l'extrémité aval du circuit 3. Le clapet 8 pare-poussière est sollicité vers sa position aval par un organe 14 de rappel tel qu'un ressort.The dust-proof valve 8 comprises an upstream end 108 and is disposed downstream of the isolation valve 7. The dust-barrier valve 8 is movable relative to the body 2 between a downstream closed position of the downstream end of the circuit 3 and at least one upstream open position of the downstream end of the circuit 3. The dust-barrier valve 8 is biased towards its downstream position by a return member 14 such as a spring.

Comme représenté à la [Fig. 1] et à la [Fig. 5], en situation de repos (pas de sollicitation externe), les trois clapets 8, 7, 11 sont dans leur position de fermeture du circuit 3.As shown in [ Fig. 1 ] and at [ Fig. 5 ], in idle situation (no external stress), the three valves 8, 7, 11 are in their circuit 3 closed position.

Avantageusement et comme détaillé ci-après, le robinet 1 comprend un orifice calibré 4 définissant une ouverture déterminée autorisant un passage de gaz entre l'amont et l'aval du clapet 11 amont lorsque ce dernier est dans sa position de fermeture du circuit 3. Cette ouverture déterminée de l'orifice calibré 4 est cependant inférieure à l'ouverture produite lorsque le clapet 11 amont est dans sa position d'ouverture du circuit 3.Advantageously and as detailed below, the valve 1 comprises a calibrated orifice 4 defining a determined opening allowing a passage of gas between the upstream and downstream of the upstream valve 11 when the latter is in its position for closing the circuit 3. This determined opening of the calibrated orifice 4 is however less than the opening produced when the upstream valve 11 is in its open position of the circuit 3.

Le clapet 8 pare-poussière est déplaçable de sa position aval de fermeture vers une première position amont déterminée dite « sans contact » ouvrant l'extrémité aval du circuit 3, dans laquelle l'extrémité 108 amont du clapet 8 pare-poussière ne pousse pas le clapet 7 d'isolement (pas de contact avec le clapet 7 d'isolement) cf. [Fig. 2].The dust-barrier valve 8 can be moved from its downstream closed position to a first determined upstream position called “contactless” opening the downstream end of the circuit 3, in which the upstream end 108 of the dust-barrier valve 8 does not push. isolation valve 7 (no contact with isolation valve 7) cf. [ Fig. 2 ].

Cette position peut être obtenue par exemple en raccordant à l'extrémité aval du corps 2 du robinet 1 un outil 123 de remplissage et/ou soutirage. Par exemple, l'outil 123 comporte un organe 23 pousse clapet mobile qui vient légèrement déplacer le clapet 8 par poussière de l'aval vers l'amont. Comme schématisé, le pousse-clapet 23 peut être déplace par exemple via un levier pivotant actionnable manuellement, hydrauliquement, pneumatiquement, électriquement ou par tout autre organe d'actionnement approprie.This position can be obtained for example by connecting to the downstream end of the body 2 of the valve 1 a tool 123 for filling and / or withdrawing. For example, the tool 123 comprises a member 23 pushing the movable valve which slightly moves the valve 8 by dust from downstream to upstream. As shown diagrammatically, the valve pusher 23 can be moved for example via a pivoting lever which can be actuated manually, hydraulically, pneumatically, electrically or by any other suitable actuator.

Cette position sans contact présente de nombreux avantages. Ainsi, cette configuration dans laquelle seul le clapet 8 pare-poussière est ouvert permet de raccorder de façon étanche un outil de remplissage et/ou de soutirage à l'extrémité aval du robinet 2 avec un effort constant quel que soit le niveau de pression en amont du clapet 7 d'isolation. En effet, la pression en amont du clapet 8 pare-poussière peut être la même qu'a l'extérieur du robinet (pression atmosphérique ambiante), en particulier lorsque le clapet 8 pare-poussière ferme de façon non étanche l'extrémité aval 6 du circuit 3.This contactless position has many advantages. Thus, this configuration in which only the dust-proof valve 8 is open makes it possible to connect a filling and / or withdrawal tool in a sealed manner to the downstream end of the valve 2 with a constant force whatever the pressure level in upstream of the isolation valve 7. In fact, the pressure upstream of the dust-barrier valve 8 may be the same as the outside of the valve (ambient atmospheric pressure), in particular when the dust-proof valve 8 closes the downstream end 6 of circuit 3 in a leaky manner.

De plus, cette configuration sans contact permet également à un outil de remplissage/soutirage de réaliser des tests d'étanchéité du clapet 7 d'isolement. L'outil de remplissage/soutirage se raccorde de façon étanche à l'extrémité 6 du robinet et peut être configurée pour réaliser une mise sous vide (dépression) dans la partie aval du circuit 3 (en aval du clapet 7 d'isolation). Ceci permet de réaliser un ou des tests pour vérifier/qualifier le niveau d'étanchéité du clapet 7 et de l'outil, par exemple avant de soumettre le mécanisme à des pressions élevées.In addition, this contactless configuration also allows a filling / withdrawing tool to perform leak testing of the isolation valve 7. The filling / withdrawing tool is connected in a sealed manner to the end 6 of the valve and can be configured to create a vacuum (depression) in the downstream part of the circuit 3 (downstream of the isolation valve 7). This makes it possible to carry out one or more tests to check / qualify the level of tightness of the valve 7 and of the tool, for example before subjecting the mechanism to high pressures.

Le clapet 8 pare-poussière est déplaçable plus loin vers l'amont dans une seconde position amont déterminée dite « de contact » ouvrant l'extrémité aval 6 du circuit 3 et dans laquelle l'extrémité 108 amont du clapet 8 pare-poussière vient pousser une extrémité aval du clapet 7 d'isolement. Le clapet 7 d'isolement est alors déplacé par contact hors de son siège 9 vers une première position amont d'ouverture du circuit 3 dans laquelle le clapet 7 d'isolement ne pousse pas le troisième clapet 11 amont (cf. [Fig. 3]).The dust-barrier valve 8 is movable further upstream in a second determined upstream position called "contact" opening the downstream end 6 of the circuit 3 and in which the upstream end 108 of the dust-barrier valve 8 pushes. a downstream end of the isolation valve 7. The isolation valve 7 is then moved by contact out of its seat 9 to a first upstream opening position of the circuit 3 in which the isolation valve 7 does not push the third upstream valve 11 (cf. [ Fig. 3 ]).

Dans cette position, le fluide sous pression peut s'échapper vers l'extrémité aval selon le débit imposé par l'orifice calibré 4.In this position, the pressurized fluid can escape towards the downstream end according to the flow rate imposed by the calibrated orifice 4.

C'est-à-dire que, dans ce cas, les deux premiers clapets 8, 7 sont ouverts mécaniquement tandis que le troisième clapet 11 amont est en positon fermée mais un débit calibré peut tout de même s'échapper.That is to say that, in this case, the first two valves 8, 7 are opened mechanically while the third upstream valve 11 is in the closed position, but a calibrated flow rate can still escape.

Cette configuration correspond à un début de soutirage via une ouverture progressive du circuit permettant de contrôler une montée en pression progressive en aval (circulation de fluide schématisée par une flèche à la [Fig. 3]).This configuration corresponds to a start of withdrawal via a progressive opening of the circuit making it possible to control a gradual rise in pressure downstream (circulation of fluid shown diagrammatically by an arrow at the [ Fig. 3 ]).

Le clapet 8 pare-poussière est déplaçable encore plus loin vers l'amont dans une troisième position amont déterminée ouvrant le circuit 3. Dans cette position l'extrémité 108 amont du clapet 8 pare-poussière vient pousser une extrémité aval du clapet 7 d'isolement mobile pour déplacer par contact le clapet 7 d'isolement hors de son siège 9 vers une seconde position amont d'ouverture du circuit 3. Dans cette position, le clapet 7 d'isolement pousse le clapet 11 amont dans une position d'ouverture complète de l'extrémité amont du circuit 3. C'est-à-dire que, dans ce cas, les trois clapets 8, 7, 11 sont complètement ouverts permettant une circulation maximale de fluide.The dust-barrier valve 8 can be moved even further upstream in a third determined upstream position opening the circuit 3. In this position the upstream end 108 of the dust-barrier valve 8 pushes a downstream end of the valve 7 of movable isolation to move by contact the isolation valve 7 out of its seat 9 to a second upstream opening position of the circuit 3. In this position, the isolation valve 7 pushes the upstream valve 11 into an open position complete of the upstream end of the circuit 3. That is to say that, in this case, the three valves 8, 7, 11 are completely open allowing maximum circulation of fluid.

Cette configuration correspond à un état de remplissage ou de soutirage d'un réservoir 40 a travers le robinet 1 (cf. [Fig. 4] où une flèche à deux sens symbolise le cas d'un remplissage ou d'un soutirage).This configuration corresponds to a state of filling or drawing off of a reservoir 40 through the tap 1 (cf. [ Fig. 4 ] where a two-way arrow symbolizes the case of filling or drawing off).

C'est-à-dire que, dans la configuration de la [Fig. 4], si un utilisateur tente de remplir le réservoir (en injectant du gaz sous pression de l'amont 6 vers l'aval), le mécanisme anti-retour va provoquer la fermeture du clapet 11 amont. En particulier, la pression du gaz de l'aval 6 vers l'amont 5 va générer sur le clapet 11 amont un effet dans le sens de la fermeture de ce dernier.That is, in the configuration of the [ Fig. 4 ], if a user tries to fill the tank (by injecting pressurized gas from upstream 6 to downstream), the non-return mechanism will cause the upstream valve 11 to close. In particular, the gas pressure from downstream 6 to upstream 5 will generate an effect on the upstream valve 11 in the direction of the latter's closing.

Le mécanisme anti-retour (« NRV ») peut comprendre un mécanisme du même type que celui décrit dans le document FR3033386A .The anti-return mechanism ("NRV") may include a mechanism of the same type as that described in the document FR3033386A .

La [Fig. 5] illustre plus en détail un exemple de réalisation possible et non limitatif d'un robinet.The [ Fig. 5 ] illustrates in more detail a possible and non-limiting embodiment of a valve.

Le robinet 1 possède un corps 2 de forme essentiellement ou majoritairement cylindrique. Une première zone du corps 2 (côté aval 6) comprend une portion cylindrique définissant sur la surface extérieure du corps 2 une ou plusieurs rainures 19 et/ou une ou plusieurs nervures 20.The valve 1 has a body 2 of essentially or predominantly cylindrical shape. A first zone of the body 2 (downstream side 6) comprises a cylindrical portion defining on the outer surface of the body 2 one or more grooves 19 and / or one or more ribs 20.

Cette portion 18 forme une empreinte déterminée pour coopérer en accrochage mécanique avec un organe d'accrochage conjugué déterminée (griffe(s) et/ou système à billes ou autre...) d'un organe 123 de conditionnement (cf. par exemple figure 2). Cette portion permet ainsi détrompage ou décodage entre le robinet 1 (et donc le gaz du réservoir auquel il est lié) le module 123 de soutirage ou remplissage correspondant.This portion 18 forms an imprint determined to cooperate in mechanical attachment with a determined conjugate attachment member (claw (s) and / or ball system or other ...) of a conditioning member 123 (cf. for example figure 2 ). This portion thus allows keying or decoding between the valve 1 (and therefore the gas from the reservoir to which it is linked) the corresponding withdrawal or filling module 123.

En amont de cette première portion, le corps 2 peut comprendre de préférence une zone prévue pour coopérer avec un outil de montage (par exemple une clé) sur un réservoir. Cette interface a de préférence plusieurs pans et est par exemple hexagonale pour la coopération avec un outil de serrage et capable de résister au couple de serrage nécessaire au bon maintien corps sur un réservoir.Upstream of this first portion, the body 2 can preferably comprise a zone intended to cooperate with an assembly tool (for example a key) on a reservoir. This interface preferably has several sides and is for example hexagonal for cooperation with a tightening tool and capable of withstanding the tightening torque necessary for the body to be properly held on a reservoir.

En amont encore, le corps 2 peut comprendre une zone 22 filetée pour le raccordement du robinet 1 dans le taraudage d'une bouteille 40 de gaz par exemple.Also upstream, the body 2 may include a threaded zone 22 for connecting the valve 1 in the thread of a gas cylinder 40 for example.

Le corps 2 comprend un canal longitudinal central interne formant le circuit 3 interne. Le clapet 8 pare poussière situé au niveau de l'extrémité aval 6 du circuit 3 est de préférence un clapet étanche, par exemple via un joint porté par le clapet 8 mobile et coopérant avec la partie périphérique fixe du corps 2. De préférence également, le clapet 8 pare-poussière affleure (est situé dans le même plan que l'extrémité aval 6 du corps 2) en position de fermeture. De cette façon, le risque de collecter de l'eau, des poussières ou salissures est évité ou au moins réduit grâce au clapet 8 pare-poussière.The body 2 comprises an internal central longitudinal channel forming the internal circuit 3. The dust barrier valve 8 located at the downstream end 6 of the circuit 3 is preferably a sealed valve, for example via a seal carried by the movable valve 8 and cooperating with the fixed peripheral part of the body 2. Also preferably, the dust-proof valve 8 is flush (is located in the same plane as the downstream end 6 of the body 2) in the closed position. In this way, the risk of collecting water, dust or dirt is avoided or at least reduced thanks to the dust cover 8.

Le clapet 8 d'isolement peut comprendre une extrémité 108 centrale faisant saille vers l'amont et permettant la coopération avec le clapet 7 d'isolement adjacent. Par exemple, cette extrémité 108 peut coopérer avec une extrémité 13 aval du clapet 7 d'isolation.The isolation valve 8 may include a central end 108 projecting upstream and allowing cooperation with the adjacent isolation valve 7. For example, this end 108 can cooperate with a downstream end 13 of the isolation valve 7.

L'organe 10 de rappel du clapet 7 d'isolation peut être monté autour d'une partie de ce clapet 7.The return member 10 of the isolation valve 7 can be mounted around a part of this valve 7.

Plus en amont le clapet 11 amont est sollicité contre un siège 15 par un organe 12 de rappel.Further upstream, the upstream valve 11 is urged against a seat 15 by a return member 12.

Le robinet possède un orifice calibré qui permet un passage limité de gaz de part et d'autre du clapet 11 amont même lorsque celui-ci est en position fermée.The valve has a calibrated orifice which allows a limited passage of gas on either side of the upstream valve 11 even when the latter is in the closed position.

De préférence, l'orifice calibré 4 délimite une ouverture ayant une première section déterminée S1 tandis que l'ouverture produite lorsque le clapet 11 amont est dans sa position d'ouverture du circuit 3 a une seconde section déterminée S2 de sorte que le rapport entre la première section S1 et la seconde section S2 est compris entre 1/100 et 1/20 et de préférence 1/80 et 1/30.Preferably, the calibrated orifice 4 delimits an opening having a first determined section S1 while the opening produced when the upstream valve 11 is in its open position of the circuit 3 has a second determined section S2 so that the ratio between the first section S1 and the second section S2 is between 1/100 and 1/20 and preferably 1/80 and 1/30.

Le passage (première section d'ouverture S1) de l'orifice calibré peut être obtenu en altérant la ligne d'étanchéité entre le clapet 11 amont et son siège 15 par un brochage, un trait de scie ou autre outil sur le clapet ou sur son siège. Le clapet 11 peut ne pas être parfaitement cylindrique (boule à facettes, bille poreuse, ou de tout autre forme pour permettre au gaz de passer avec un débit limité).The passage (first opening section S1) of the calibrated orifice can be obtained by altering the sealing line between the upstream valve 11 and its seat 15 by broaching, a saw cut or other tool on the valve or on his seat. The valve 11 may not be perfectly cylindrical (faceted ball, porous ball, or of any other shape to allow the gas to pass with a limited flow rate).

Une autre solution alternative ou cumulative est de placer un orifice calibré en parallèle de ce clapet 11 amont, pour assurer le passage limité du gaz. Alternativement cet orifice calibré peut passer au travers du corps du clapet 11 amont.Another alternative or cumulative solution is to place a calibrated orifice in parallel with this upstream valve 11, to ensure the limited passage of gas. Alternatively, this calibrated orifice can pass through the body of the upstream valve 11.

Cette structure permet la séquence d'ouverture suivante :
Dans un premier temps, un outil de remplissage/soutirage peut être raccordé mécaniquement à l'extrémité aval du robinet. Un maintien mécanique et une étanchéité externe peut être réalisée entre l'outil et le robinet 1.This structure allows the following opening sequence:
First, a filling / withdrawing tool can be mechanically connected to the downstream end of the valve. a mechanical retention and an external seal can be achieved between the tool and the valve 1.

Puis, une ouverture partielle du circuit peut être réalisée en ouvrant le clapet 8 pare-poussière et le clapet 7 d'isolation grâce à l'orifice 4 calibré. Ceci réalise une montée en pression progressive en aval.Then, a partial opening of the circuit can be achieved by opening the dust cover 8 and the isolation valve 7 through the calibrated orifice 4. This produces a gradual rise in pressure downstream.

Ensuite, le clapet 11 amont peut être ouvert pour un débit maximal.Then, the upstream valve 11 can be opened for maximum flow.

Cette séquence peut être utilisée aussi bien pour un remplissage qu'un soutirage.This sequence can be used for filling as well as for drawing off.

La course du ou des clapets, la longueur de la conduite gazeuse et le débit calibré de limitation peuvent être adaptées pour favoriser une montée en pression progressive du système lors de l'ouverture.The stroke of the valve (s), the length of the gas pipe and the calibrated limiting flow rate can be adapted to promote a gradual rise in pressure of the system during opening.

L'élément de manœuvre (levier ou autre) du pousse-clapet 23 de l'outil peut être configuré pour séquencer ces différentes étapes (ouverture partielle ou complète du circuit 3).The operating element (lever or other) of the valve pusher 23 of the tool can be configured to sequence these different steps (partial or complete opening of circuit 3).

Cette architecture permet de balayer de circuit vers l'aval (jet dit « flush »).This architecture makes it possible to sweep the circuit downstream (so-called “flush” jet).

Selon une particularité avantageuse (indépendamment de ce qui précède ou en combinaison avec ce qui précède), le clapet 8 pare-poussière peut former un clapet de pression résiduel maintenant une pression minimale dans le circuit lorsqu'il est en position fermée.According to an advantageous feature (independently of the foregoing or in combination with the foregoing), the dust barrier valve 8 can form a residual pressure valve maintaining a minimum pressure in the circuit when it is in the closed position.

Par exemple, le clapet 8 pare-poussière lui-même et/ou un joint qu'il porte et/ou un joint du corps du robinet avec lequel il coopère est déformable pour évacuer vers l'extérieur un excès de pression dans le circuit au-dessus d'un seuil déterminé (par exemple au-dessus de 200mbar et jusqu'à 10bar ou plus notamment 15bar ou 20 bar ou plus, notamment entre 200mbar et six à huit bar, par exemple 1 à 6bar) mais reste en position fermée et étanche lorsque la pression dans le circuit est inférieure à ce seuil. De cette façon, le clapet de pression résiduelle maintient dans le circuit une pression au-dessus de la pression atmosphérique lorsque le clapet 8 pare-poussière est en position fermée.For example, the dust-proof valve 8 itself and / or a seal that it carries and / or a seal of the valve body with which it cooperates is deformable in order to evacuate excess pressure in the circuit to the outside. -above a determined threshold (for example above 200mbar and up to 10bar or more in particular 15bar or 20 bar or more, in particular between 200mbar and six to eight bar, for example 1 to 6bar) but remains in the closed position and sealed when the pressure in the circuit is below this threshold. In this way, the residual pressure valve maintains a pressure in the circuit above atmospheric pressure when the dust cover 8 is in the closed position.

Ceci procure l'avantage de maintenir une pression résiduelle dans le robinet quelle que soit les étapes de connexion au robinet. De plus, ceci permet de réaliser une fonction de maintien de pression résiduelle ne présentant pas de problème de sifflement ou de risque de non refermeture par l'absence d'étanchéité dynamique avec un organe d'ouverture du clapet. En outre, ceci permet le maintien d'une pression résiduelle autorégulée dont la valeur maximale ne dégrade pas l'ergonomie de la connexion (pression résiduelle multipliée par la surface d'appuie étant inférieure à l'effort nécessaire de de connexion).This provides the advantage of maintaining a residual pressure in the valve regardless of the steps of connection to the valve. In addition, this makes it possible to perform a residual pressure maintenance function that does not present a hissing problem or risk of non-reclosing by the absence of dynamic sealing with a valve opening member. In addition, this allows a self-regulated residual pressure to be maintained, the maximum value of which does not degrade the ergonomics of the connection (residual pressure multiplied by the bearing surface being less than the necessary connection force).

Un avantage de garder de la pression résiduelle est d'interdire tout risque de pénétration de pollution venant de l'extérieur en complément de la protection générée par le joint 28 et clapet 8 lui-même.An advantage of keeping the residual pressure is that it prevents any risk of ingress of pollution coming from the outside in addition to the protection generated by the seal 28 and valve 8 itself.

Un exemple de réalisation possible est illustré aux [Fig. 6], [Fig. 7], [Fig. 8] et [Fig. 9].An example of a possible embodiment is illustrated in [ Fig. 6 ], [ Fig. 7 ], [ Fig. 8 ] and [ Fig. 9 ].

Ainsi, le clapet 8 pare-poussière peut comporter un piston mobile équipé d'une gorge accueillant un joint 28 annulaire en contact avec un alésage dans lequel coulisse le piston. En position stockage le piston est maintenue en position haute grâce à un organe de rappel tel qu'un ressort 14.Thus, the dust-proof valve 8 may include a movable piston equipped with a groove accommodating an annular seal 28 in contact with a bore in which the piston slides. In the storage position, the piston is held in the high position by means of a return member such as a spring 14.

Le joint 28 pourrait bien sûr être surmoulé et/ou vulcanisé sur le piston.The seal 28 could of course be overmolded and / or vulcanized on the piston.

A la [Fig. 6] le clapet 8 pare-poussière est en position fermée (position de stockage par exemple). Le clapet 8 pare poussière comprend un joint 28 torique périphérique formant une lèvre qui vient s'appuyer de façon étanche sur la bordure circulaire de l'orifice formé dans le corps 2 du robinet. Par exemple, la lèvre est orientée vers le haut (vers la sortie du robinet 2).To the [ Fig. 6 ] the dust cover 8 is in the closed position (storage position for example). The dust barrier valve 8 comprises a peripheral O-ring 28 forming a lip which comes to rest in a sealed manner on the circular edge of the orifice formed in the body 2 of the valve. For example, the lip faces upwards (towards the outlet of tap 2).

Dans cette configuration, le contact entre le joint 28 du clapet 8 pare poussière et l'alésage délimitant son orifice de passage permet une étanchéité au gaz qui assure que la chambre amont du pare poussière 8 n'est pas mise à l'air. Le joint 28 peut se déformer sous l'effet de la pression à l'intérieur (en amont du pare poussière 8) de façon à expulser l'excès de pression vers l'extérieur.In this configuration, the contact between the gasket 28 of the dust barrier 8 and the bore delimiting its passage opening provides a gas seal which ensures that the upstream chamber of the dust barrier 8 is not vented. The seal 28 may deform under the effect of the pressure inside (upstream of the dust barrier 8) so as to expel the excess pressure to the outside.

A la [Fig. 7] le clapet 8 pare-poussière est en position fermée mais assurant une évacuation de gaz en excès vers l'extérieur du robinet 1 (position de stockage avec évacuation de pression). L'extrémité du joint 28 est repoussée par l'excès de pression en amont, l'étanchéité est rompue pour permettre uniquement l'évacuation du gaz. Dès que la pression redescend en dessous du seuil d'ouverture, le joint reprend sa position de fermeture étanche précédemment décrite. Ainsi, cette ouverture mesurée n'est possible que dans le sens d'évacuation et sous certaines conditions de différentiel de pression entre l'intérieur (entre amont du pare poussière 8) et l'extérieur. De préférence, le joint 28 est suffisamment élastique pour revenir dans sa position initiale après avoir évacué l'excès de pression, ce qui permet de recouvrer l'étanchéité au gaz. Le gradient de pression entre le gaz contenue dans la chambre et l'extérieur assure que le volume de la chambre n'est pas contaminé dans l'air ambiant.To the [ Fig. 7 ] the dust-proof valve 8 is in the closed position but ensuring an evacuation of excess gas to the outside of the valve 1 (storage position with pressure evacuation). The end of the seal 28 is pushed back by the excess upstream pressure, the seal is broken to allow only the gas to escape. As soon as the pressure drops below the opening threshold, the seal returns to its sealed closed position previously described. Thus, this measured opening is only possible in the direction of discharge and under certain pressure differential conditions between the interior (between the upstream side of the dust barrier 8) and the exterior. Preferably, the seal 28 is sufficiently elastic to return to its initial position after having released the excess pressure, which makes it possible to recover the gas tightness. The pressure gradient between the gas contained in the chamber and the outside ensures that the volume of the chamber is not contaminated in the ambient air.

A la [Fig. 8] le clapet 8 pare-poussière est repoussé vers l'amont (vers l'intérieur du robinet 2) par un axe 23 pousse-clapet qui peut comporter un joint 123 d'étanchéité périphérique assurant une étanchéité avec le circuit du robinet au niveau de l'orifice d'entrée. Le clapet 8 pare-poussière peut encore posséder une étanchéité avec le corps 2 du robinet.To the [ Fig. 8 ] the dust-proof valve 8 is pushed upstream (towards the inside of the valve 2) by a valve pusher pin 23 which may include a peripheral seal 123 ensuring a seal with the valve circuit at the level of the inlet port. The dust-proof valve 8 can still have a seal with the body 2 of the valve.

Lors de la connexion complète (déplacement complet du pare-poussière), le joint 28 du clapet 8 pare poussière peut être positionné sur le piston de telle sorte que le contact entre le joint 28 du clapet pare poussière 8 et l'alésage n'est rompu qu'après que le contact étanche ne soit établi entre le joint 23 de l'axe 123 et l'alésage du robinet. Ainsi, la connexion d'un organe portant le pousse-clapet 23 sur le robinet ne remet pas à l'air le volume de gaz de la chambre située en amont du clapet pare poussière 8.During the complete connection (complete displacement of the dust cover), the gasket 28 of the dust cover 8 can be positioned on the piston so that the contact between the gasket 28 of the dust cover 8 and the bore is not broken only after tight contact is established between the seal 23 of the shaft 123 and the valve bore. Thus, the connection of a member carrying the valve pusher 23 on the valve does not release the volume of gas in the chamber located upstream of the dust valve 8 to air.

Si un module (robinet ou autre) se raccorde de façon étanche au niveau de l'extrémité aval 6 et que ce module est doté d'une fonction de clapet de pression résiduelle (RPV) alors il règne une pression positive dans la connectique même après la purge du circuit en aval. Ainsi, la séquence ci-dessus permet garantir une étanchéité simultanée des deux joints (28 et 123. Cette architecture permet de conserver une pression positive dans la chambre en amont du clapet 8 pare-poussière dès la déconnexion du module. Il n'est pas besoin d'attendre une "fuite naturelle" du clapet 7 d'isolation pour profiter de cette originalité.If a module (valve or other) is connected in a sealed manner at the level of the downstream end 6 and this module is equipped with a residual pressure valve (RPV) function, then there is a positive pressure in the connections even after purging the downstream circuit. Thus, the above sequence makes it possible to guarantee simultaneous sealing of the two seals (28 and 123. This architecture makes it possible to maintain a positive pressure in the chamber upstream of the dust-barrier valve 8 as soon as the module is disconnected. It is not need to wait for a "natural leak" from the isolation valve 7 to take advantage of this originality.

A la [Fig. 9] le clapet 8 pare-poussière est arrivé en position ouverte (étanchéité rompue avec le corps du robinet).To the [ Fig. 9 ] the dust-proof valve 8 has reached the open position (seal broken with the valve body).

Dans cette position ouverte, la position du piston du clapet 8 pare poussière, la course du pousse-clapet 23 présent dans le robinet 1 et la position des différents joints (28 et 123) sont de préférence tels que le joint 28 du clapet 8 pare poussière n'est jamais en contact ni avec l'alésage délimitant l'orifice ni avec le corps du robinet. Ceci permet d'éviter d'emprisonner de gaz sous pression.In this open position, the position of the piston of the dust barrier valve 8, the stroke of the valve pusher 23 present in the valve 1 and the position of the various seals (28 and 123) are preferably such that the seal 28 of the valve 8 protects dust is never in contact with the bore delimiting the orifice or with the valve body. This makes it possible to avoid trapping gas under pressure.

Lorsque du gaz est soutiré (de l'amont vers l'aval) le gaz peut s'écouler vers l'aval du clapet 8 pare-poussière au moyen par exemple d'un ou plusieurs orifices présents dans ou autour du pousse clapet 23 ou tout autre pièce appropriée. Par exemple, des orifices peuvent être prévus radialement notamment dans le cas où l'activation de la fonction ouverture/fermeture se fait de façon indépendante. Selon une autre possibilité, un perçage coaxial à l'axe pousse-clapet 23 peut être prévu pour le transit de gaz.When gas is withdrawn (from upstream to downstream) the gas can flow downstream from the dust-barrier valve 8, for example by means of one or more orifices present in or around the valve pusher 23 or any other suitable part. For example, orifices can be provided radially in particular in the case where the opening / closing function is activated independently. According to another possibility, a bore coaxial with the valve pusher axis 23 may be provided for the transit of gas.

Lors de la déconnexion du l'organe 23 pousse-clapet (et du robinet qui le porte), le déplacement inverse se produit dans le sens de la fermeture. Le joint 28 du clapet 8 pare poussière et le joint 123 de l'axe 23 peuvent être positionnés de telle sorte que le contact entre le joint 28 du clapet 8 pare-poussière et l'alésage 2 s'établit avant que le contact étanche entre le joint 123 de l'axe pousse-clapet 23 et l'alésage du bouchon pare poussière ne soit perdu. Ceci permet encore d'éviter de contaminer le circuit en amont du clapet 8 pare-poussière.When disconnecting the valve pusher 23 (and the valve which carries it), the reverse movement occurs in the direction of closure. The seal 28 of the dust shield 8 and the seal 123 of the shaft 23 can be positioned such that the contact between the seal 28 of the dust shield 8 and the bore 2 is established before the sealed contact between the seal 123 of the valve pusher shaft 23 and the bore of the dust cover is not lost. This also makes it possible to avoid contaminating the circuit upstream of the dust-proof valve 8.

Selon cette solution, les problèmes de sifflements et de non refermeture rencontrés avec des clapets de pression résiduelles connus sont évités. Ceci peut être rendu possible grâce à l'intégration de la fonction anti-retour (NRV) dans la tête (dans un second robinet qui se raccorde de façon amovible sur le robinet 2) et non dans le clapet 8 de pression résiduelle comme cela est usuel. Ceci est obtenu également grâce au pilotage de la position du piston du clapet 8 pare poussière faisant office de clapet de pression résiduelle (RPV) et par les organes extérieurs (axe pousse-clapet 23...). L'absence d'étanchéité dynamique (le joint 123 est de préférence statique) permet également de réduire les problèmes précités (sifflement et/ou frottements).According to this solution, the problems of hissing and non-reclosing encountered with known residual pressure valves are avoided. This can be made possible thanks to the integration of the non-return function (NRV) in the head (in a second valve which is removably connected to the valve 2) and not in the valve 8 of residual pressure as is usual. This is also obtained by controlling the position of the piston of the dust barrier valve 8 acting as a residual pressure valve (RPV) and by the external members (valve push pin 23, etc.). The absence of dynamic sealing (the seal 123 is preferably static) also makes it possible to reduce the aforementioned problems (hissing and / or friction).

Dans le cas où un second robinet vient se raccorder sur le premier robinet 2 pour assurer des soutirages/remplissages de gaz, la fonction de clapet de pression résiduelle est donc présente sur le premier robinet 2 grâce au clapet 8 pare-poussière comme décrit ci-dessus. Lorsque les clapets du premier robinet sont ouverts en vue d'un soutirage, la fonction de clapet de pression résiduelle peut être assurée par un autre clapet de pression résiduelle qui est logé dans le second robinet en relation fluidique avec le circuit du premier robinet. Ceci permet d'éviter la mise en résonnance d'un oscillateur dans le système.In the event that a second valve is connected to the first valve 2 to provide gas withdrawals / fillings, the residual pressure valve function is therefore present on the first valve 2 thanks to the dust barrier valve 8 as described below. above. When the valves of the first valve are opened for withdrawal, the residual pressure valve function can be performed by another valve. residual pressure which is housed in the second valve in fluid relationship with the circuit of the first valve. This makes it possible to avoid the resonance of an oscillator in the system.

Lors d'un remplissage les deux clapets de pression résiduelle sont neutralisés. En effet, le clapet 8 pare poussière est automatiquement inhibé, ce qui évite d'avoir des problèmes liés aux opérations manuelles (commutations de leviers par exemple).When filling the two residual pressure valves are neutralized. In fact, the dust-proof valve 8 is automatically inhibited, which avoids having problems linked to manual operations (switching of levers for example).

Claims (16)

  1. Valve comprising a body (2) delimiting an internal fluid withdrawal and possibly fluid filling circuit (3), the said internal circuit (3) extending between an upstream end (5) intended to be placed in communication with the storage volume of a tank and a downstream end (6) intended to be connected to a user member withdrawing or distributing pressurized fluid via the internal circuit (3), the valve (1) comprising, placed in series from upstream to downstream in the internal circuit (3) between the upstream end (5) and the downstream end (6): an upstream valve shutter (11), an isolation valve shutter (7) and a dust valve shutter (8), the dust valve shutter (8) being able to move relative to the body (2) between a position in which the upstream end of the circuit (3) is closed and at least two distinct open positions, when the dust valve shutter (8) is in the closed position, the isolation valve shutter (7) and the upstream valve shutter (11) being in respective positions in which the circuit (3) is closed, in the at least two respective distinct open positions of the dust valve shutter (8), either only the isolation valve shutter (7) being in a position in which the circuit is open or, respectively, the isolation valve shutter (7) and the upstream valve shutter (11) being in positions in which the circuit is open, characterized in that the valve (1) comprises a calibrated orifice (4) defining a determined opening allowing gas to pass between upstream and downstream of the upstream valve shutter (11) when the latter is in its position in which the circuit (3) is closed, said determined opening of the calibrated orifice (7) being smaller than the opening produced when the upstream valve shutter (11) is in its position in which the circuit (3) is open.
  2. Valve according to Claim 1, characterized in that the calibrated orifice (4) delimits an opening having a first determined cross section (S1) whereas the opening produced when the upstream valve shutter (11) is in its position in which the circuit (3) is open has a second determined cross section (S2) and in that the ratio between the first cross section (S1) and the second cross section (S2) is comprised between 1/100 and 1/20 and preferably 1/80 and 1/30.
  3. Valve according to Claim 1 or 2, characterized in that the isolation valve shutter (7) is able to move relative to a seat (9) between a downstream position in which the circuit (3) is closed and at least one upstream position in which the circuit (3) is open, the said isolation valve shutter (7) being urged towards its downstream position by a return member (10), the dust valve shutter (8) comprising an upstream end (108) and being able to move relative to the body (2) between a downstream position in which the upstream end of the circuit (3) is closed and at least one upstream position in which the downstream end of the circuit (3) is open, the said dust valve shutter (8) being urged towards its downstream position by a return member (14), the upstream valve shutter (11) being able to move relative to a seat between a downstream position in which the circuit (3) is closed and at least one upstream position in which the circuit (3) is open, the upstream valve shutter (11) being urged towards its downstream closed position by a return member (12) .
  4. Valve according to Claim 3, characterized in that the dust valve shutter (8) is able to move from its downstream closed position towards: a first determined upstream position referred to as the "contactless" position opening the downstream end of the circuit (3), in which position the downstream end (108) of the dust valve shutter (8) does not push against the isolation valve shutter (7), or a second determined upstream position referred to as the "contacting" position opening the downstream end (6) of the circuit (3), in which position the upstream end (108) of the dust valve shutter (8) pushes on a downstream end of the mobile isolation valve shutter (7) in order, through contact, to move the isolation valve shutter (7) off its seat (9) towards a first upstream position in which the circuit (3) is open, in which position the isolation valve shutter (7) does not push on the upstream valve shutter (11), or a third determined upstream position opening the downstream end (6) of the circuit (3), in which position the upstream end (108) of the dust valve shutter (8) pushes on a downstream end of the mobile isolation valve shutter (7) to move the isolation valve shutter (7) off its seat (9) towards a second upstream position in which the circuit (3) is open, in which position the isolation valve shutter (7) pushes the upstream valve shutter (11) into its position in which the upstream end of the circuit is open.
  5. Valve according to any one of Claims 1 to 4, characterized in that the calibrated orifice (4) is delimited at least in part by the upstream valve shutter (11) or an element thereof.
  6. Valve according to any one of Claims 1 to 5, characterized in that the calibrated orifice (4) is housed in the upstream valve shutter (11).
  7. Valve according to any one of Claims 1 to 6, characterized in that the calibrated orifice comprises a shutter such as a ball pushed towards a seat by a return member, the shutter bearing non-sealingly on the seat.
  8. Valve according to any one of Claims 1 to 7, characterized in that the dust valve shutter (8) is a residual pressure valve shutter maintaining a minimum pressure in the circuit when it is in the closed position and allowing gas to be discharged from the circuit in the event of an overpressure above a determined pressure threshold.
  9. Valve according to Claim 8, characterized in that the valve comprises a deformable seal situated on the dust valve shutter (8) and/or on the body (2) and able and configured for excess pressure in the circuit above a determined threshold to be discharged to the outside, but remaining in a closed and sealed position when the pressure in the circuit is below this threshold.
  10. Container for pressurized fluid, particularly a pressurized-gas cylinder or collection of cylinders, comprising a valve (1) according to any one of Claims 1 to 9.
  11. Method for filling a pressurized-fluid container according to Claim 10 using a filling/withdrawal connector (123) mechanically connected to the body (2) of the valve (1) removably, characterized in that this method comprises a step of moving the dust valve shutter (8) from upstream towards downstream into a determined downstream so-called "filling" position opening the downstream end (6) of the circuit (3), in which position the dust valve shutter (8) pushes against a downstream end of the mobile isolation valve shutter (7) and moves the valve shutter (7) towards an upstream position in which the circuit (3) is open, and in that the upstream valve shutter (11) is also moved into a position in which the upstream end of the circuit (3) is open so as to allow fluid to be transferred from downstream to upstream into the container (40).
  12. Filling method according to Claim 11, characterized in that, in its upstream "filling" position, the dust valve shutter (8) pushes on a downstream end of the mobile isolation valve shutter (7) and through contact moves the isolation valve shutter (7) into a determined open position in which the isolation valve shutter (7) in its turn pushes the upstream valve shutter (11) into a position in which the downstream end of the circuit (3) is open so as to allow fluid to be transferred from downstream to upstream into the container (40).
  13. Filling method according to Claim 11 or 12, characterized in that the dust valve shutter (8) is moved in the upstream direction by a mechanical action of one end of a mobile valve driver (23) belonging to the filling/withdrawal connector (123) .
  14. Method for withdrawing pressurized fluid from a pressurized-fluid container according to Claim 10 by means of a filling/withdrawal connector (123) mechanically connected to the body (2) of the valve (1) removably, characterized in that the method comprises a first step of moving the dust valve shutter (8) from downstream towards upstream into a first open position opening the downstream end (6) of the circuit (3), in which position the dust valve shutter (8) pushes on the mobile isolation valve shutter (7) in order through contact to move the isolation valve shutter (7) towards a position in which the circuit (3) is open, in which position the isolation valve shutter (7) does not push on the upstream valve shutter (11), so as to allow fluid in the circuit to be withdrawn from upstream (5) towards downstream (6) through the calibrated orifice (4).
  15. Method for withdrawing according to Claim 14, characterized in that this method comprises a second step of moving the dust valve shutter (8) from downstream towards upstream into a second open position opening the downstream end (6) of the circuit (3), in which position the dust valve shutter (8) pushes on the mobile isolation valve shutter (7) to move the isolation valve shutter (7) towards a position in which the circuit (3) is open, in which position the isolation valve shutter (7) pushes the upstream valve shutter (11) into its open position so as to allow fluid in the circuit to be withdrawn from upstream (5) towards downstream (6) without being restricted to the opening of the calibrated orifice (4).
  16. Method for withdrawing according to Claim 15, characterized in that the first and the second step of moving the dust valve shutter (8) from downstream towards upstream into the first and second open positions respectively are performed in sequence to ensure progressive opening of the circuit (3).
EP20160563.1A 2019-03-12 2020-03-03 Valve, container for pressurised fluid and filling and extraction methods Active EP3708899B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1902484A FR3093781B1 (en) 2019-03-12 2019-03-12 Valve, pressurized fluid container and methods of filling and withdrawing.

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Publication Number Publication Date
EP3708899A1 EP3708899A1 (en) 2020-09-16
EP3708899B1 true EP3708899B1 (en) 2021-11-17

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US (1) US11149906B2 (en)
EP (1) EP3708899B1 (en)
DK (1) DK3708899T3 (en)
ES (1) ES2906179T3 (en)
FR (1) FR3093781B1 (en)
PT (1) PT3708899T (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2965302T3 (en) * 2015-12-03 2024-04-12 Engineered Controls Int Llc Low Emission Nozzles and Receptacles
LU500234B1 (en) * 2021-06-01 2022-12-01 Rotarex Solutions S A Valve with shutter mounter from the inlet side for co2 cartridge

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Also Published As

Publication number Publication date
EP3708899A1 (en) 2020-09-16
PT3708899T (en) 2022-02-02
FR3093781A1 (en) 2020-09-18
FR3093781B1 (en) 2021-02-12
ES2906179T3 (en) 2022-04-13
DK3708899T3 (en) 2022-02-07
US20200292135A1 (en) 2020-09-17
US11149906B2 (en) 2021-10-19

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