Classifications

• • G—PHYSICS
  • G05—CONTROLLING; REGULATING
  • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
  • G05D23/00—Control of temperature
  • G05D23/01—Control of temperature without auxiliary power
  • G05D23/02—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature
  • G05D23/021—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature the sensing element being a non-metallic solid, e.g. elastomer, paste
  • G05D23/023—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature the sensing element being a non-metallic solid, e.g. elastomer, paste the sensing element being placed outside a regulating fluid flow
• • 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
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/7722—Line condition change responsive valves
  • Y10T137/7723—Safety cut-off requiring reset
  • Y10T137/7726—Responsive to change in rate of flow
  • Y10T137/7727—Excessive flow cut-off
• • 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
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/7722—Line condition change responsive valves
  • Y10T137/7737—Thermal responsive
• • 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
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/7722—Line condition change responsive valves
  • Y10T137/7781—With separate connected fluid reactor surface
  • Y10T137/7793—With opening bias [e.g., pressure regulator]
  • Y10T137/7797—Bias variable during operation
• • 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
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/7722—Line condition change responsive valves
  • Y10T137/7781—With separate connected fluid reactor surface
  • Y10T137/7793—With opening bias [e.g., pressure regulator]
  • Y10T137/7822—Reactor surface closes chamber
  • Y10T137/783—Reactor operatively connected to valve by mechanical movement
• • 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
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/8158—With indicator, register, recorder, alarm or inspection means
  • Y10T137/8225—Position or extent of motion indicator
  • Y10T137/8275—Indicator element rigidly carried by the movable element whose position is indicated

Definitions

• the present invention relates to a gas pressure regulator intended to be mounted on a gas supply pipe connecting a gas source to a user device.
• the gas phase metering of gases intended for domestic and / or industrial uses, such as natural gas or LPG (liquefied petroleum gas), is mainly done using a volumetric meter, positioned at the level of the pipeline. of distribution.
• Document FR 2 786 865 precisely describes a gas pressure regulator allowing the delivery of a volume flow corrected in pressure as a function of the temperature of the gas.
• a capsule containing a fluid or a liquefied gas is placed in the gas pipe.
• This capsule is connected by a capillary to a bellows exerting stresses on a spring acting on the membrane of the pressure reducer to which is attached a mechanism for regulating the pressure.
• the pressure of the fluid contained in the capsule varies, and it follows that the stresses exerted on the membrane also vary.
• Such a regulator is however difficult to produce because it is necessary to provide tight crossings from one volume to another.
• the capillary must be protected mechanically.
• Document FR 2 807 833 describes a gas supply device with determination of the volume flow corrected in temperature and in pressure. This device comprises in particular a regulator comprising a thermosensitive member placed in a room at ambient temperature.
• this device is relatively bulky and expensive, and does not directly take into account the temperature of the gas entering the device. Furthermore, like all gases, propane or LPG have a variable density depending on the altitude at which they are stored.
• the main object of the present invention is to solve the aforementioned drawback, and for this purpose relates to a gas pressure regulator intended to be mounted on a gas supply pipe connecting a gas source to a user device, and comprising a mechanism pressure regulation controlled by the movement of a movable element, characterized in that it comprises a housing containing at least one adjustable prestressed actuator acting on the movable element and making it possible to take into account the variation of the altimetric pressure.
• this actuator being adjustable, it is possible to modify the stresses applied to the movable element controlling the pressure regulator mechanism of the regulator in order to take account of the altitude at which the regulator is located.
• the adjustable prestressed actuator is produced using a spring having, on the one hand, a first end in abutment against the movable element, and on the other hand, a second end in abutment against an adjustable member from the outside.
• the adjustable member is produced using an altimetric adjustment ring having a side wall resting on the second end of the spring.
• a knurled cover covers the adjustable member and has an at least partially threaded internal face capable of cooperating with a threaded part of the side wall of the housing.
• the side wall of the housing is provided with a graduation making it possible to position the knurled cover adequately as a function of the altitude.
• sealing means for example a pin, a breakable ring, or a thermo element deformable, are preferably provided in order to immobilize the knurled cover. after it has been correctly positioned.
• a regulator according to the invention comprises a thermosensitive member acting on the movable element by means of at least one actuator.
• the heat-sensitive member comprises a deformable internal wall and contains an element with variable volume.
• the actuator is produced using a push rod bearing on an intermediate spring, said push rod being inserted in the heat-sensitive member so as to come into contact with the deformable internal wall thereof. This.
• This regulator is very simple to make, and overcomes the problem of fragility inherent in the use of an external capillary.
• the body is covered by an insulating envelope. This can, for example, allow to provide an insulating air space around the body, or even be made of a thermal insulating material.
• the body is made of a material with low thermal conductivity, in particular a thermoplastic with appropriate characteristics.
• a regulator according to the invention can also comprise a load shedding system arranged at the level of the mobile element.
• the mobile element is produced in the form of a membrane
• the load shedding system comprises, on the one hand, a base attached to the pressure regulation mechanism, and on the other hand, a rod passing through the membrane , a central spring being positioned around the rod so as to have a first end resting on the membrane and a second end integral with the rod.
• the forces transmitted by the membrane may exceed the thrust generated by the thermosensitive member, there is therefore a load shedding system making it possible to relieve said thermosensitive member.
• the side wall of the housing comprises at least one orifice for releasing the flow of gas having passed through the load shedding system.
• a friction ring can be placed in the housing and have, on the one hand, a base slid between the membrane and the springs, and on the other hand, a toothed lateral wall in contact with the internal face of the wall. side of the housing.
• a regulator according to the invention comprises a flow limiter system whose triggering occurs for any flow greater than at least 20% of the nominal flow.
• This flow limiting system advantageously comprises a manual reset member capable of acting on a shutter element.
• a regulator according to the invention as pilot of a large diameter regulator.
• the pressure delivered by the regulator which is the subject of the invention acts on the external face of the mobile element of the regulator of larger diameter.
• Figure 1 is a perspective view of a regulator according to the invention.
• Figure 2 is a front view in longitudinal section of the regulator shown in Figure 1, when the knurled cover is fully unscrewed.
• Figure 3 is a front view in longitudinal section of the regulator shown in Figure 1, when the knurled cover is fully depressed.
• a regulator 1 according to the invention is obtained from a substantially tubular housing 2 which is made of a material with low thermal conductivity, for example a thermoplastic with suitable characteristics.
• This box 2 has a side wall 3 having, on the one hand, a lower part 4 made integral with a main duct 5 intended to be positioned on a gas supply duct connecting a gas source to a user device (not shown), and on the other hand, an upper end 6 bent towards the inside of the housing 2.
• the side wall 3 has a lateral recess 15 and is provided with a release opening 7 for the gas flow.
• a circular membrane 8 is fixed at the junction line between the main conduit 5 and the lower part 4 of the housing 2.
• This membrane 8 comprises, on the one hand, a central orifice in which is inserted a rod 9 provided with a base 10, and on the other hand, a circular bead 40.
• This rod 9 is finally housed in the housing 2, while its base 10 remains in the main conduit 5.
• the base 10 is designed so as to have a circular recess in which the bead 40 of the membrane 8 is housed.
• the rod 9 is attached to an internal regulation mechanism.
• the latter comprises a valve 11, inserted into a central orifice presented by the base 10 so as to be able to pivot around the rod 9, which is able to cooperate with a seat 12 integral with the main conduit 5.
• a friction ring 13, housed in the housing 2, is placed in abutment on the membrane 8.
• This friction ring 13, as shown more particularly in FIG. 3, comprises, on the one hand, a base 14 which is placed in contact with the membrane 8 and which is provided with a central perforation through which the rod 9 passes, and on the other hand, a circular toothed side wall whose diameter is slightly less than that of the housing 2 in the lower part 4.
• a central spring 28 of small diameter is positioned around the rod 9 and has, on the one hand, a lower end resting on the base 14 of the friction ring 13, and on the other hand, an upper end on which is attached a toothed washer 16 then made integral with the rod 9.
• thermosensitive member 17 to which an annular wedging element 18 is attached is inserted into the housing 2. More specifically, the wedging element 18 is fixed in the upper end 6 of the housing 2, and the thermosensitive member 17 is substantially tubular and therefore has an internal central channel.
• this thermosensitive member 17 has, on the one hand, a rigid external wall, and on the other hand, a deformable internal wall, an element with variable volume reacting according to the variation in temperature being positioned between said external walls. and internal.
• a push rod 19 having a substantially flat head 20 is slid into the central channel presented by the thermosensitive member 17 so as to abut against the deformable wall of the latter.
• a peripheral spring 21 and an intermediate spring 22 are also added in the housing 2.
• the spring intermediate 22 comes to bear against the head 20 of the push rod 19 and against the base 14 of the friction ring 13.
• the peripheral spring 21 is itself interposed between, on the one hand, the base 14 of the ring friction 13, and on the other hand, the lower end of a side wall presented by an altimetric adjustment ring 24.
• This side wall is formed by teeth 25 spaced from one another and capable of sliding through slots made in the upper curved end 6 of the housing 2.
• a knurled cover 26 is finally attached to the upper end 6 of the housing 2, and makes it possible to hide the altimetric adjustment ring 24.
• This knurled cover 26 has a partially threaded internal face capable of cooperating with a threaded part presented by the side wall 3 of the housing 2.
• the knurled cover 26 has an internal shoulder 27 designed to abut against the lateral detachment 15 of said side wall 3 when the knurled cover 26 is completely screwed onto the housing 2.
• the knurled cover 26 is screwed in or out. tion of the imposed direction of rotation, it is possible to move the altimeter adjustment ring 24 in the housing 2, up or down.
• the peripheral spring 21 can therefore be more or less compressed, and consequently determines the nominal positioning of the membrane 8.
• this adjustment can be carried out relatively precisely using a vertical scale 27 affixed to the side wall 3 of the housing 2. This scale 27 can for example be between 0 and 2000 meters, and the lower end of the knurled cover 26 can then act as a cursor.
• sealing means may be provided in order to immobilize the knurled cover 26 and therefore prevent any modification of the altimetric adjustment after the commissioning of the regulator 1.
• such a regulator 1 also allows the delivery of a volume flow corrected in pressure as a function of the ambient temperature.
• the variable volume element of the thermosensitive member 17 is caused to expand or retract almost instantaneously, and the stresses exerted on the intermediate spring 22 by means of the push rod 19 are consequently modified.
• the intermediate spring 22 bearing on the membrane 8 it follows that the positioning of the latter varies, and the valve 11 approaches or departs from the seat 12 depending on whether the membrane 8 rises or falls.
• the gas passing through the main conduit 5 is delivered under a pressure corrected as a function of the ambient temperature.
• the base 14 of the friction ring 13 has, on the one hand, a circular bulge 29 making it possible to wedge the peripheral spring 21 and the intermediate spring 22 inside the housing 2, on the other hand, a central rim enclosed by the lower end of the central spring 28.
• a load shedding system is arranged in the main duct 5 so as to evacuate a flow of gas from said main duct 5 towards the interior of the housing 2, up to 'upon re-establishment of the nominal pressure downstream of the regulator 1.
• the rod 9 remains fixed, and the membrane 8 is caused to move away from the base 10 of the rod 9, thereby exerting stresses on the main spring 28.
• the one -this is then compressed between, on the one hand, the base 14 of the friction ring 13 which has moved with the membrane 8, and on the other hand, the washer 16 secured to the rod 9.
• a gas flow can therefore escape from the main conduit 5 towards the housing 2 by passing through the central orifice of the membrane 8.
• this gas flow can finally be extracted from the regulator 1 thanks to the release orifice 7 presented by the side wall 3 of the housing 2.
• a flexible conduit 30 can be connected to this release orifice 7 in order to channel the flow of released gas into a desired area.
• the main spring 28 tends to return to its rest position and forces the membrane 8 to return to its initial location.
• the latter is provided with a system flow limiter whose intervention occurs for any flow greater than at least 20% of the nominal flow.
• This flow limiting system is made from a spring-mounted shutter element and a manual reset member also spring-loaded. More specifically, the shutter element decomposes into a piston
• the reset member comprises, on the one hand, a rod 34 positioned in the extension of the piston 31, and on the other hand, a cover 35 to which said rod 34 is connected.
• This flow limiting system also protects the installation when it is put into service under pressure, during a transition from a situation without pressure to a situation under operating pressure. Indeed, in this situation, the flow limiting system comes into action and protects the downstream installation from the rapid pressure build-up. A manual reset intervention then makes it possible to slowly pressurize the entire downstream installation.

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• Physics & Mathematics (AREA)
• Fluid Mechanics (AREA)
• General Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Automation & Control Theory (AREA)
• Control Of Fluid Pressure (AREA)
• Orthopedics, Nursing, And Contraception (AREA)
• Temperature-Responsive Valves (AREA)
• Flow Control (AREA)

Applications Claiming Priority (3)

Publications (2)

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ID=32406429

Family Applications (1)

Country Status (6)

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• 2002
  • 2002-12-23 FR FR0216554A patent/FR2849224B1/fr not_active Expired - Lifetime
• 2003
  • 2003-12-19 WO PCT/FR2003/003840 patent/WO2004059413A2/fr not_active Application Discontinuation
  • 2003-12-19 AU AU2003299380A patent/AU2003299380A1/en not_active Abandoned
  • 2003-12-19 US US10/538,797 patent/US7360555B2/en not_active Expired - Fee Related
  • 2003-12-19 EP EP03799666A patent/EP1576435A3/de not_active Withdrawn
  • 2003-12-19 BR BR0317638A patent/BR0317638A/pt not_active IP Right Cessation

Non-Patent Citations (1)

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