Classifications

• • G—PHYSICS
  • G05—CONTROLLING; REGULATING
  • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
  • G05D16/00—Control of fluid pressure
  • G05D16/04—Control of fluid pressure without auxiliary power
  • G05D16/10—Control of fluid pressure without auxiliary power the sensing element being a piston or plunger
  • G05D16/103—Control of fluid pressure without auxiliary power the sensing element being a piston or plunger the sensing element placed between the inlet and outlet
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
  • Y02E60/30—Hydrogen technology
  • Y02E60/32—Hydrogen storage

Definitions

• the present invention relates to a compact inverted regulator for the distribution of gas.
• the technical field of the invention is the field of the manufacture and use of pressurized gas expansion devices in which the delivery of the gas expanded to a predetermined pressure is independent of the pressure of the gas at the inlet.
• a pressure reducer is well known: it is based on the equality of two forces exerted directly or indirectly, on both sides of a movable regulating part, such as a diaphragm or a piston, on the one hand the gas at the high pressure and the low pressure, and on the other hand a spring element; thus in the most common case where the reference force of the spring element is exerted on the side opposite to that transmitted by both the gas at the low pressure and at the high pressure, these two gases filling two chambers separated by a partition with a duct in which slides a rod secured to the movable control member and having a valve adapted to close the duct in the direction of the high pressure chamber to the low pressure chamber, when the force transmitted to the times by the gas at the low pressure and at the high pressure is weaker than the antagonist transmitted by the spring, it pushes the movable piece of regulation whose flapper located on its rod then opens the gas inlet to the high pressure: it will thus feed the chamber to the low pressure until the latter, by
• the present invention is in the latter category of gas regulators and relates to a compact expansion valve intended to be mounted in a simple and fast manner, requiring a minimum of connections, on any type of gas supply conduit connecting most directly a source of high pressure gas to a • user apparatus operating at a low pressure, or directly between the source and the user device, and whose supply low pressure of it can be easily adjusted.
• an inverted gas expansion valve comprising at least one inlet pipe for a so-called high pressure gas, at least one outlet pipe for this so-called low pressure gas from a downstream expansion chamber, a moving part.
• regulator on which supports on the one hand the low pressure and on the other side a spring element, and which is able to close the inlet of the gas at high pressure, and upstream and downstream connectors able to connect and integrate the regulator to any gas circuit supplying, upstream thereof, the gas at high pressure and supplying, downstream of the expander, said gas at low pressure, and such as according to the invention
• said inlet ducts and output are located and each opens respectively inside the upstream and downstream connectors, and these two connectors, arranged coaxially, are able to connect online the expander to said circuit.
• the holder comprises a device for adjusting the thrust of the spring element in the closed position of the gas inlet at high pressure, which adjustment device is coaxial with the movement of the movable control piece and modifiable by rotation of the an axial element of at least one of the connectors.
• the result is a new inverted gas regulator that meets the above objectives because, among other things, it is connectable online in. any circuit or directly to one side on the high pressure gas source and the other to the user device the low pressure, the assembly then forming a compact device without intermediate connection, which is portable and nomadic, and whose adjustment of the low pressure is simple.
• Figure 1 is an axial sectional view of a pressure regulator according to the invention with a low pressure adjustment on the side of the high pressure gas supply connector.
• Figure 2 is an axial sectional view of a pressure regulator according to the invention with a low pressure adjustment on the side of the low pressure gas outlet connector.
• the regulator according to the invention comprises a substantially tubular hollow body 8 of axis XX 'and made of compatible and gas-tight material; it comprises in a known manner at least: an inlet duct 1 for a so-called high pressure gas,
• a movable regulating part 3 on which the low pressure is supported on one side and on the other side a spring element 4, and which is able to close the inlet of the high pressure gas 1, and
• upstream and downstream connectors 7 capable of connecting and integrating the expander with any gas circuit supplying, upstream, the latter with high pressure gas and feeding, downstream of the expander, said gas at low pressure.
• the said gas inlet 1 and outlet 2 pipes are located and each open respectively inside the upstream 6 and downstream 7 connectors; and these two connectors 6.7 arranged coaxially along the axis XX ', are able to connect in line along this axis, the expander to said circuit .
• a small gas storage tank such as a recharge removable hydrogen based on metal hydrides
• the other to the user apparatus from the low pressure which may be ";”.
• a small electric generator using the energy of the gas such as a small fuel cell, the assembly then forming a compact device without intermediate connection, which is transportable and nomadic.
• the hollow body 8 of this regulator is preferably made up of two coaxial hollow parts, of cylindrical shape, preferably circular in shape, one which will be called upstream on the high pressure side and the other on the downstream side. low pressure, nested and screwed into each other and forming a internal volume in which moves the movable control member 3.
• This hollow body 8 can also integrate various other components such as overpressure relief valves, security locking systems, connection devices other than the connectors. ..
• O-rings 14 are arranged on either side of the hollow body 8, on the upstream and downstream connectors 6 and downstream side 7 and respectively downstream of the inlet duct 1 and upstream of the outlet duct 2, to ensure sealing of the regulator with the circuit on which it is assembled by connecting parts which come to screw or clipper on the connectors 6,7.
• the movable control member 3 which may be a piston as shown in the figures but which could be a membrane, comprises:
• This compartment 21 preferably communicates with the outside of the holder, either by the natural leakage of the screwing between the upstream and downstream parts 11, as in FIG. 2, or by a conduit, not shown, as could be the case on the 1, if one does not want to add a disturbing compressive force against the head 20 of the piston, but on the contrary it can seal this compartment 21 and pressurize it to a given value to obtain a spring element effect apt to replace the spring 4 shown in the examples of Figures 1 and 2.
• the distal end of the rod 19 comes to rest, in the closed position of the inlet 1 of high pressure gas, against a seal forming a stop 12 and the spring element 4 surrounding the rod 19 is supported by a against the head 20 of the piston 3 and on the other side against the bottom of the upstream hollow portion 10 through which the rod 19 slides.
• the duct 1 of high pressure gas inlet is located and opens, at one of its ends, on the inside, on the side and upstream of its fastening system such as by screwing, the upstream connector 6, which it through the peripheral wall, and opens laterally at its other end, in the closed position of the inlet 1 of high pressure gas as shown in the figures, against the distal end of the rod 19 of the movable control member 3 which ensures the said closure.
• this duct 1 could be arranged in the axis XX 'of the holder, such as through or next to the plug 17 ⁇ shown in FIG.
• the arrival 1 of the gas at the high pressure opens when the low pressure in the expansion chamber 5 decreases and the thrust of the spring 4 moves the movable control member 3: the distal end of the rod 19 then lifts of the abutment seal 12, opening the inlet 1 of the gas and the communication between the latter and the expansion chamber 5 at the low pressure is provided here by an internal channel 9 of the rod 19 of the movable control member 3 and opening at both ends.
• this communication can be provided by a conduit external to the rod 20.
• This regulator preferably comprises a device 17 for adjusting the thrust of the spring element 4 which is coaxial with the movement of the movable regulating part 3 along the axis XX 'of the holder, and whose position, modifiable along this axis by rotation of an axial member cooperating with one of the connectors 6,7, determines the maximum compressive force of the spring element 4 in the closed position of the inlet 1 of high pressure gas and therefore the value of the low pressure in the expansion chamber 5, which exerts the force antagonistic to that of this spring.
• this adjusting device 17 is a plug 17 ⁇ screwed into the axis of the upstream connector 6 inside the bore drilled in the bottom of the upstream portion 10 of the expander and in which slides the rod 19 of the piston 3: this stopper maintains the abutment seal 12 at the desired height, obtained by screwing or unscrewing the stopper 17 ⁇ , so that the maximum compression of the spring 4, in the closed position of the inlet 1 of gas to high pressure, corresponds to the force to obtain the desired low pressure in the chamber 5.
• this stopper maintains the abutment seal 12 at the desired height, obtained by screwing or unscrewing the stopper 17 ⁇ , so that the maximum compression of the spring 4, in the closed position of the inlet 1 of gas to high pressure, corresponds to the force to obtain the desired low pressure in the chamber 5.
• the adjusting device 17 is a part 17 2 supporting the spring 4: this piece 17 2 is a rigid disk pierced at its center to let the rod 19 pass freely and form a double bottom in the upstream hollow portion 10 of the expander; a second spring element 18, located in this double bottom, and stiffness and force much greater than those of the control spring 4, maintains the support piece 17 2 against the peripheral edge 11 ⁇ of the downstream hollow portion 11 of the hollow body 8; in this embodiment, said downstream hollow portion 11 is necessarily nested and screwed inside the upstream hollow part 10, but this downstream portion 11 in the upstream portion 10 could also be used in the embodiment of FIG. 1 where the nesting is here inverse.

Landscapes

• Physics & Mathematics (AREA)
• Fluid Mechanics (AREA)
• General Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Automation & Control Theory (AREA)
• Control Of Fluid Pressure (AREA)
• Feeding And Controlling Fuel (AREA)

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Citations (3)

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• 2012
  • 2012-03-24 US US14/779,462 patent/US20160048138A1/en not_active Abandoned
• 2013
  • 2013-03-25 FR FR1300681A patent/FR3003656B1/fr not_active Expired - Fee Related
• 2014
  • 2014-03-24 JP JP2016504717A patent/JP6628716B2/ja active Active
  • 2014-03-24 WO PCT/FR2014/000062 patent/WO2014154953A2/fr not_active Ceased
  • 2014-03-24 EP EP14724117.8A patent/EP2979145B1/fr active Active

Patent Citations (3)

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