WO2016120673A1 - Régulateur de gaz ayant un moyen de pression variable et un moyen d'arrêt d'excès de débit - Google Patents

Régulateur de gaz ayant un moyen de pression variable et un moyen d'arrêt d'excès de débit Download PDF

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Publication number
WO2016120673A1
WO2016120673A1 PCT/IB2015/052360 IB2015052360W WO2016120673A1 WO 2016120673 A1 WO2016120673 A1 WO 2016120673A1 IB 2015052360 W IB2015052360 W IB 2015052360W WO 2016120673 A1 WO2016120673 A1 WO 2016120673A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas
regulator
pressure
flow
variable pressure
Prior art date
Application number
PCT/IB2015/052360
Other languages
English (en)
Inventor
Anand Kumar Jain
Original Assignee
Anand Kumar Jain
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Anand Kumar Jain filed Critical Anand Kumar Jain
Publication of WO2016120673A1 publication Critical patent/WO2016120673A1/fr

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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
    • G05D16/06—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule
    • G05D16/063—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane
    • G05D16/0675—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting on the obturator through a lever
    • G05D16/0683—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting on the obturator through a lever using a spring-loaded membrane

Definitions

  • the present disclosure relates to the field of mechanical engineering.
  • the present disclosure to a variable pressure gas regulator.
  • variable pressure gas regulator provided with an Excess Flow Shut-off means.
  • An object of the present disclosure is to provide a Variable pressure gas regulator with an "Excess Flow Shut-off Means" such that the Regulator functions for the entire range of variable outlet pressures without any unnecessary interruption, inconvenience or hindrance to users.
  • Still another object of the present disclosure is to provide a variable pressure gas regulator that allows gas outflow even irrespective of the orientation of the gas cylinder, particularly, even when the cylinder is inclined up to a specific angle from the vertical.
  • Another object of the present disclosure is to provide a variable pressure gas regulator that it is of durable materials, which are compatible with Liquid Petroleum Gas (LPG) and do not corrode or deteriorate over the years.
  • LPG Liquid Petroleum Gas
  • Yet another object of the present disclosure is to provide a variable pressure gas regulator that reduces the cost incurred in assembling.
  • Still another object of the present disclosure is to provide a variable pressure gas regulator which is simple to manufacture.
  • Still another object of the present disclosure is to provide a variable pressure gas regulator that is robust in construction.
  • Yet another object of the present disclosure is to provide a variable pressure gas regulator which is cost effective.
  • Still another object of the present disclosure is to provide a variable pressure gas regulator that is compact.
  • VPR Variable pressure gas regulator
  • At least one locking means adapted to lock and hold in position said VPR onto said LPG Valve of said gas cylinder;
  • At least one spindle arrangement adapted to press said LPG valve which allows gas from cylinder to enter said high pressure chamber;
  • At least one moving member (typically a steel ball) located within the sensing chamber;
  • At least one resilient seal typically an o-ring (or a rigid seat) at the outlet of the sensing chamber for totally (or partially) stopping flow;
  • At least one orifice positioned in the space between said sensing chamber and said low pressure chamber;
  • At least one flexible diaphragm adapted to sense pressure variation between said high pressure chamber and said low pressure chamber;
  • At least one lever means connected to said diaphragm, said lever means adapted to respond to said sensed pressure variation and adjust the flow of gas from the high pressure chamber to the low pressure chamber;
  • At least one nozzle located between said high pressure chamber and said low pressure chamber for allowing flow from the high pressure chamber to the low pressure chamber, with said rubber pad of said lever means, sitting on the nozzle or rising from said nozzle to seal or allow the flow thereby regulating the flow;
  • a cover adapted to be crimped to the VPR body, and to hold securely said diaphragm in position and having threaded internal threads for movement of the threaded spindle of a wheel;
  • At least one load spring adapted to variably load said diaphragm for regulating outlet pressure to deliver gas at desired pressure
  • variable pressure gas regulator with excess flow shut-off of the present disclosure will now be explained in relation to the non-limiting accompanying drawing, in which:
  • Fig. 1 illustrates a sectional view depicting internal details of a variable pressure gas regulator with excess flow shut-off in accordance with an embodiment of the present disclosure
  • Fig. 2 illustrates a sectional view depicting internal details of a variable pressure gas regulator with excess flow shut-off in accordance with another embodiment of the present disclosure
  • Fig. 3 illustrates a sectional view depicting internal details of a variable pressure gas regulator with excess flow shut-off in accordance with still another embodiment of the present disclosure.
  • variable pressure gas regulator with excess flow shut-off of the present disclosure which will now be described in detail with reference to drawing, do not limit the scope and ambit of the invention.
  • the description provided is purely by way of example and illustration.
  • the embodiment herein, the various features, and advantageous details thereof are explained with reference to the non-limiting embodiments in the following description. Descriptions of well- known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein.
  • the examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced, and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
  • variable pressure gas regulator with excess flow shut-off of the present disclosure which will now be described in detail with reference to drawing, do not limit the scope and ambit of the invention.
  • the description provided is purely by way of example and illustration.
  • variable pressure gas regulator The principle of operation of the variable pressure gas regulator is providing the necessary flows required for the satisfactory functioning of the Variable pressure gas regulator and yet achieving shut-off during excessive flow is based on the balance achieved between the geometry, orientation, locations, sizes and the other parameters of the multiple sets of holes & the flow passage in relation to the moving member geometry, size, inertia, location and the like.
  • variable pressure gas regulator (hereinafter referred to as VPR) according to the present disclosure is generally indicated by the reference numeral 100 and is particularly shown in Fig 1 of the drawings.
  • the primary objective of the present disclosure is to provide an "Excess Flow Shut-off Means" in a VPR so that the "Excess Flow Shut-off Means” automatically actuates and completely shuts the gas flow if and when the rubber tube gets, cut, burnt, or ripped-off and an excess flow of gas occurs.
  • the "Excess Flow Shut-off Means” should not get activated so that users are not put to any unnecessary interruption or inconvenience during normal usage, while getting the required safety.
  • the VPR 100 consists of housing defined by a body 1 and a cover 2 crimped together and houses the various parts.
  • the inlet port of the VPR 100 at the operative bottom side of the body 1 has a cylindrical extended portion la for accommodating an outlet of a valve of a gas cylinder (not illustrated in Figure) during fitment of the VPR 100 onto the valve.
  • the extended portion la at its appropriate transverse plane, has at least three angularly equi-spaced holes lb within which are contained one clamping ball 3 each.
  • the holes in the body lb are tapered inwards and of such 'size and shape' that they permit the clamping balls 3 to project inwards, but do not allow the clamping balls 3 to pass fully through the holes lb, thereby restricting their inward projection to the extent required for effectively clamping onto the valve.
  • the cylindrical extended portion la of the VPR 100 is surrounded by a hollow cylindrical clamping bush 4 for retaining the clamping balls 3 in their respective holes. Also, the circumferential profile of the inner surface of the bush 4 is such that, there are two cylindrical surfaces of different diameters that are linked together with a tapered face.
  • the larger diameter cylinder is meant to allow the balls 3 to move outwards sufficiently, for achieving release from the valve while the smaller diameter cylinder is meant to push the balls 3 inwards sufficiently for achieving clamping to the valve.
  • the bush 4 can move axially for bringing the two diameters into the operative transverse position where the clamping balls 3 are located. This entire arrangement helps in either clamping or removing the VPRIOO from the valve.
  • the arrangement in the Variable pressure gas regulator (VPR) 100 for permitting gas flow into the VPR 100 consists of a working rod 5 positioned centrally in the bottom portion of the VPR 100.
  • the bottom end of the working rod 5 enters the cylinder valve and abuts against the spring loaded closure arrangement of the valve.
  • a tight joint gasket 6 presses against the flat end of the cylinder valve and the stub of the VPR 100 fits tight in the bore of the resilient seal of the valve (not shown) to collectively form a leak-proof joint.
  • the Rotary On-Off knob (Operating Tap) 7 consists of a tap spindle 8 positioned within the regulator body 1. When the rotary On-Off knob 7 is turned, the tap spindle 8 urges the working rod 5 against the spring loaded closure arrangement of the valve of the cylinder (not shown).
  • Fig. 2 illustrates a sectional view depicting internal details of a variable pressure gas regulator 200 with excess flow shut-off means in accordance with another embodiment of the present disclosure.
  • the inlet port of the VPR 200 is on one side of the body 29 in the shape of an extended tube 29a which is cylindrical on the outside for accommodating a rotatable nut 30 and having an internal thread 29b for accommodating a threaded connector 31 that keeps the nut 30 in place and the nut 30 with a rubber washer 32 in between is tightened on the threaded outlet of a wheel type LPG valve (not illustrated in Figure) to achieve a leak proof joint.
  • Fig. 3 illustrates a sectional view depicting internal details of a variable pressure gas regulator 300 with excess flow shut-off in accordance with still another embodiment of the present disclosure. More specifically, in still one another embodiment of the variable pressure gas regulator 300 with excess flow shut-off as illustrated in Fig. 3, the fitment of the regulator to the valve is the same as for the VPR 100 of Fig.
  • variable load spring 34 acts on a pressure regulator, which in the present embodiment is a diaphragm 35, to directly transmit its loads onto the rubber pad 36 which in turn is the seat.
  • the stored gas in the cylinder is admitted into the high pressure chamber 9 and then flows via a flow sensing chamber 10 and through the jet 11 into the low pressure chamber 12.
  • the outlet orifice 11a of the jet 11 is covered by a rubber pad 13 provided at the end of a hinged lever 14.
  • This lever is operated by a pressure regulator, which is a spring loaded diaphragm 15 that controls and regulates a pressure differential across the inlet port and the outlet port.
  • the load spring 16 biases the diaphragm 15 in one direction and the low pressure chamber 12, biases the diaphragm 15 in the opposite direction.
  • the difference of the above opposing forces moves the diaphragm 15 up or down and consequently the lever 14 and the rubber pad 13 also move.
  • the movement of the rubber pad 13 uncovers the orifice 11a of the jet 11 in proportion to the diaphragm movement to proportionately admit the gas into the low pressure chamber 12.
  • the outlet port 17 of the VPR 100 is connected to a hose (not shown) which conveys the gas to the gas burner (not shown).
  • the pressure variation means in the VPR 100 for varying the outlet pressure comprises a rotatable wheel 18 provided with a threaded stem 18a and a stub 18b for crimping and accommodating a freely rotatable spring holder 19, to enclose the load spring end away from the diaphragm.
  • the cover 2 at its top end has a threaded hole 2a to accommodate the threaded stem 18a of the wheel 18. Rotation of the wheel 18 causes the threaded stem 18a to travel into and out of the cover 2. This inward and outward movement of the threaded stem 18a of the wheel 18 directly increases or decreases the compression of the load spring 16 through the spring holder 19.
  • the rotatable wheel is used to vary the outlet pressure of the gas by controlling the pressure regulator, which is the diaphragm 15, wherein the pressure regulator receives pressurized gas through the inlet port and facilitates a regulated flow of the gas via the outlet port.
  • the pressure regulator which is the diaphragm 15
  • the pressure regulator receives pressurized gas through the inlet port and facilitates a regulated flow of the gas via the outlet port.
  • the upper and lower limits of travel of the threaded stem 18a and consequently the limits of the load exerted by the load spring 16 on the diaphragm 15, determine the range of regulated outlet pressures of the VPR 100.
  • the upper and lower limits of travel of the threaded stem 18a and consequently the limits of the load exerted by the load spring 16 on the diaphragm 15, determine the range of regulated outlet pressures of the VPR 100.
  • the "Excess Flow Shut-off Means” consists of the sensing chamber 10 located after the high pressure chamber 9 but before the jet 11.
  • a moving member 20 (typically a steel ball or a suitably shaped member) is disposed within the sensing chamber 10 and displaceable within the sensing chamber 10.
  • the moving member 20 is biased by a spring 33 of defined inertia and the moving member 20, under normal condition of the flow, even up to the maximum permitted flow the moving member 20 remains in its normal position. However, when the flow exceeds the maximum permitted flow by a predetermined and pre-decided percentage of said maximum flow this additional flow is designated as excess flow.
  • the outlet of the sensing chamber 10 has a resilient seal 21 (typically an o-ring) held in position by metallic washer 22 and plunger housing 23.
  • the inlet port to the sensing chamber 10 has a flow cross section smaller than the flow cross section of the sensing chamber 10 to ensure impart of entire gas flow energy to the moving member 20 due to flow of the gas over the surface of the moving member 20.
  • the moving member 20 is configured to move and block a passage of gas through the sensing chamber 10 when flow energy of the gas passing through sensing chamber exceeds the moment of inertia of the moving member. More specifically, when excess gas flow occurs and creates a pressure differential across the moving member 20, due to which the kinetic energy of the flowing gas exceeds the inertia of the moving member 20, causing the moving member 20 to become dynamic and move to sit on the O-rings 21 to completely seal-off the outlet and cutting-off the excess flow totally.
  • the reset means that facilitate the unblocking of the passage of gas that has been blocked by the moving member 20, comprises plunger 24 is capable of being manually actuated by means of the knob 25 for providing the desired axial sliding movement which is obtained by pressing down on the knob 25 repeatedly a few times, dislodging the moving member 20 from the O-rings 21 and the moving member 20 returns to its normal position and hence allows the re -establishment of connection between inlet port and outlet port, thereby allowing the resumption of the gas flow through the sensing chamber 10.
  • the plunger 24 is contained in a plunger housing 23 screwed to the body 1 and made leak proof by means of a housing O- rings 26.
  • the plunger 24 is movable and also in direct communication with the gas chamber, two plunger o-rings 27 have been provided to prevent any leakage of gas and yet allow axial movement of the plunger 24.
  • the plunger 24 returns to its original position after being manually actuated on account of a reset spring 28.
  • the sensing chamber 10 and the moving member 20 are configured to permit a desired gas flow rate around the surface of the moving member 20 thereby causing the moving member 20 to block the passage of gas through the sensing chamber, when the gas flow passing through the sensing chamber exceeds the desired flow.
  • a VPR is manufactured and tested. More specifically, the regulator is mounted on the cylinder valve of Liquid Petroleum Gas (LPG) cylinder. A rubber tube of sufficient pressure rating meant for use with LPG is used to connect the regulator to a 4 burner gas stove.
  • LPG Liquid Petroleum Gas
  • VPR Variable pressure gas regulator
  • VPR Variable pressure gas regulator

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Safety Valves (AREA)

Abstract

La présente invention concerne un régulateur de gaz à pression variable qui comprend un boîtier, un orifice d'entrée permettant de recevoir un gaz, un orifice de sortie permettant de raccorder un tube pour faciliter une évacuation du gaz, un régulateur de pression permettant de commander un différentiel de pression entre l'orifice d'entrée et l'orifice de sortie pour maintenir une pression de sortie stable du gaz, et un moyen de variation de pression permettant de varier la pression de sortie. Le régulateur de gaz à pression variable comprend également un moyen de prévention d'excès de débit de gaz. Le moyen de variation de pression comprend une roue rotative permettant de varier la pression de sortie du gaz en commandant le régulateur de pression, lequel régulateur de pression reçoit un gaz sous pression à travers ledit orifice d'entrée, et facilite un flux régulé du gaz vers l'orifice de sortie.
PCT/IB2015/052360 2015-01-29 2015-03-31 Régulateur de gaz ayant un moyen de pression variable et un moyen d'arrêt d'excès de débit WO2016120673A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN302/MUM/2015 2015-01-29
IN302MU2015 2015-01-29

Publications (1)

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WO2016120673A1 true WO2016120673A1 (fr) 2016-08-04

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112728120A (zh) * 2020-12-29 2021-04-30 河北鑫星调压器有限公司 一种安全防爆型燃气调压器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4240458A (en) * 1978-04-26 1980-12-23 Harper-Wyman Company Excess pressure shutoff valve
EP2761214A1 (fr) * 2011-08-29 2014-08-06 Westport Power Inc. Régulateur de pression de gaz variable

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4240458A (en) * 1978-04-26 1980-12-23 Harper-Wyman Company Excess pressure shutoff valve
EP2761214A1 (fr) * 2011-08-29 2014-08-06 Westport Power Inc. Régulateur de pression de gaz variable

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112728120A (zh) * 2020-12-29 2021-04-30 河北鑫星调压器有限公司 一种安全防爆型燃气调压器

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