EP0124405B1 - Dispositif pour fournir à une conduite un fluide sous une pression déterminée en provenance de deux récipients - Google Patents

Dispositif pour fournir à une conduite un fluide sous une pression déterminée en provenance de deux récipients Download PDF

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Publication number
EP0124405B1
EP0124405B1 EP84400668A EP84400668A EP0124405B1 EP 0124405 B1 EP0124405 B1 EP 0124405B1 EP 84400668 A EP84400668 A EP 84400668A EP 84400668 A EP84400668 A EP 84400668A EP 0124405 B1 EP0124405 B1 EP 0124405B1
Authority
EP
European Patent Office
Prior art keywords
pressure
input
gas
output
containers
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.)
Expired
Application number
EP84400668A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0124405A1 (fr
Inventor
Gérard Loiseau
Maurice Molozay
Michel Rigo
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.)
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Priority to AT84400668T priority Critical patent/ATE24756T1/de
Publication of EP0124405A1 publication Critical patent/EP0124405A1/fr
Application granted granted Critical
Publication of EP0124405B1 publication Critical patent/EP0124405B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • F17C13/045—Automatic change-over switching assembly for bottled gas systems with two (or more) gas containers
    • 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
    • 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
    • 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
    • F17C2227/046—Methods for emptying or filling by even emptying or filling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/043—Pressure
    • 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
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2559—Self-controlled branched flow systems
    • Y10T137/2564—Plural inflows
    • Y10T137/2567—Alternate or successive inflows
    • Y10T137/2569—Control by depletion of source

Definitions

  • the present invention relates to devices known under the name of "automatic distribution centers", that is to say the devices serving to supply a pipe with a fluid under a determined pressure from two containers, one of which is in service while the other is in reserve.
  • the invention relates more particularly to devices of the type comprising dispensing means adapted to put one or the other of the two receptacles in communication with said pipe, means for automatic reversal of the dispensing means actuated by means of two switches. sensitive to the degree of filling of the container in service, and pressure regulating means delivering the fluid under the operating pressure and comprising a common pressure regulator disposed in said pipe.
  • the object of the invention is to provide an automatic power station which, despite a simple and economical construction, is perfectly reliable, precisely adjustable and capable of ensuring a stable pressure during reversals.
  • the subject of the invention is a device of the aforementioned type, characterized in that said common pressure regulator is subjected to its entry at the pressure prevailing in the container in service, in that the distributor means comprise two valves stop controlled by the reversing means and connected respectively to the two receptacles.
  • the gas distribution installation illustrated in the drawing is intended to deliver, in a pipe 1 equipped with a pressure reducer or regulator 2 and a safety valve 3, a gas contained in two bottles 4A and 4B, which can , in practice, each be constituted by a group of bottles assembled in a frame or frame.
  • the installation includes a number of split pneumatic components corresponding to the two bottles 4A and 4B.
  • these pairs of components will be designated by the same reference, assigned the suffix "A” or “B” depending on whether they are associated with one or the other of the two bottles.
  • These components are: two stop valves 5A, 5B arranged at the outlet of the two bottles; two pressure sensors 6A, 6B; two “NO” logics 7A, 7B; two timers 8A, 8B; two pneumatic indicators 9A, 9B; two logics “OR inclusive 10A; 1 OB; and two pneumatically operated stop valves 11 A, 11 B.
  • the installation also includes certain elements common to the two circuits, which are a source of low pressure gas 12, a manual switch 13 with two positions, a pneumatic memory 14 and an auxiliary switch 15 with three positions.
  • Elements 6-11 and 13-15 are pneumatic components well known in the art and commercially available. It suffices to describe their functions.
  • the gas source 12 is constituted by a gas cylinder 16 provided with a regulator 17, the outlet of which, for example at 6 bars, is connected in parallel on the one hand to the inlet of the switch 13, on the other hand share at the two inputs of the switch 15.
  • the source 12 could be constituted by the low pressure network of air or another gas of the user.
  • the type of switch 13 is connected to a first inlet of each of the components 6 to 8 and 14.
  • the outlet of each tap 5 is connected by a line 18 to a first inlet of the associated valve 11, and the outlet of the two valves 11 is connected to line 1, upstream of the regulator 2.
  • Each sensor 6 has a second input, or control input, connected to the associated pipe 18, between the tap 5 and the valve 11, by a pipe 19 shown in dashed lines.
  • the first input of the sensor is put in communication with its output, which is connected to a second input, or control input, of the associated “NO” logic 7.
  • Each “NO” logic 7 communicates its first input and its output in the absence of a pneumatic signal on its second input, and interrupts this communication as soon as a pneumatic signal is received at its second input.
  • the output of logic 7 is connected to a second input, or control input, of the associated timer 8.
  • Each timer 8 puts its first input into communication with its output when it receives a pneumatic signal at its second input for a predetermined time. In the absence of such a signal, or if the signal has a duration less than this predetermined time, it interrupts this communication.
  • the memory 14 has two control inputs connected respectively to the outputs of the timers 8, and two outputs respectively connected to a first input of the “OR” logic 10.
  • the memory contains a floating drawer with two positions whose ends are respectively opposite the two memory control inputs; in each position, this drawer puts the first memory input into communication with one of the two outputs. The drawer only changes position if a pneumatic signal appears at the command input corresponding to the change in position considered.
  • each “OR” logic 10 is connected to a respective output of the auxiliary switch 15, and its output is connected to the control member.
  • valve valve 11 associated. A pneumatic signal appears at this output in the presence of a pneumatic signal at one or the other of the two inputs of the "OR” logic.
  • Each indicator 9A, 9B is connected to the pipe which connects the "OR" logic 1 OA, 1 respective OB to the corresponding output of memory 14.
  • the switch 13 has a position "I” in which its input is placed in communication with its output, and a position "0” in which this communication is cut off.
  • the switch 15 has a neutral position "0", in which none of its outputs is put in communication with the corresponding input, and two active positions "A” and "B” in each of which an input of this switch is put in communication with the second input of the associated logic “OR” 10.
  • the two bottles 4A, 4B are full and contain the gas to be delivered under a high pressure which is for example 200 bars.
  • the switch 13 is in position "0", as well as the switch 15. No component of the low pressure circuit is therefore supplied by the source 12, so that the two valves 11 are closed and that no gas flow does not exit via line 1.
  • the memory is in any one of its two positions, for example, as shown, in that which puts its first entry into communication with the logic “OR” 10A.
  • the switch 13 is operated at its position "1", then the two taps 5 are opened.
  • the two sensors 6, subjected to a pressure greater than their threshold pressure, deliver a pneumatic signal to their exit. Consequently, no signal appears at the output of the "NO" logic 7, nor consequently at that of the timers 8.
  • the memory 14 therefore remains in the state it was in, and the low pressure gas, which had opened valve 11 A via this memory and the "OR" logic 10A as soon as the switch 13 was operated, keeps this valve 11 A permanently open.
  • the cylinder 4A therefore delivers high pressure gas in line 1, and this gas is expanded by the regulator 2 to its operating pressure.
  • the 4B bottle remains full, in reserve.
  • the indicator 9A indicates that the cylinder 4A is in service.
  • valve 11 A the low pressure supply to valve 11 A is cut off and, simultaneously, that to valve 11B is established, which is checked by means of indicator lights 9A and 9B.
  • the threshold pressure of the sensors 6 is correctly chosen according to the possibilities of the regulator 2, no jerk will be perceptible downstream of the latter during the inversion.
  • low pressure gas reaches the control inputs of the memory 14 only during the brief periods during which the sensors 6 detect an insufficient pressure, that is to say during bottle changes. Low pressure gas consumption is thus minimal.
  • timers 8 provides great convenience in use, for the following reason. After a period of shutdown, it is desirable to put the already partially emptied bottle back into service, to have a full bottle in reserve. The installation according to the invention automatically performs this function.
  • the auxiliary bottle 16 can be replaced by a tapping on the pipes 18. The installation is then entirely autonomous .
  • the invention can also be applied to the case where the bottles 4A and 4B contain a liquefied gas, or even a liquid intended to be dispensed in liquid form.
  • the sensors 6A, 6B would then be replaced by sensitive switches at the level of the liquid in the two bottles.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Pipeline Systems (AREA)
  • Measuring Fluid Pressure (AREA)
  • Electric Cable Installation (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
EP84400668A 1983-04-11 1984-04-05 Dispositif pour fournir à une conduite un fluide sous une pression déterminée en provenance de deux récipients Expired EP0124405B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84400668T ATE24756T1 (de) 1983-04-11 1984-04-05 Vorrichtung zur abgabe eines fluidums mit einem gegebenen druck aus zwei behaeltern an einer leitung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8305859A FR2544052B1 (fr) 1983-04-11 1983-04-11 Dispositif pour fournir a une conduite un fluide sous une pression determinee en provenance de deux recipients
FR8305859 1983-04-11

Publications (2)

Publication Number Publication Date
EP0124405A1 EP0124405A1 (fr) 1984-11-07
EP0124405B1 true EP0124405B1 (fr) 1987-01-07

Family

ID=9287703

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84400668A Expired EP0124405B1 (fr) 1983-04-11 1984-04-05 Dispositif pour fournir à une conduite un fluide sous une pression déterminée en provenance de deux récipients

Country Status (8)

Country Link
US (1) US4597406A (ja)
EP (1) EP0124405B1 (ja)
JP (1) JPS6018695A (ja)
AT (1) ATE24756T1 (ja)
CA (1) CA1230099A (ja)
DE (1) DE3461949D1 (ja)
ES (1) ES531310A0 (ja)
FR (1) FR2544052B1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106090602A (zh) * 2016-07-27 2016-11-09 国网江苏省电力公司检修分公司 Gis恒压补气装置

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6326500A (ja) * 1986-07-18 1988-02-04 Fujitsu Ltd 圧縮ガス容器系統自動切換装置
DE3733442A1 (de) * 1987-10-02 1989-04-13 Linde Ag Verfahren und vorrichtung zum entleeren von mit gas gefuellten behaeltern
US5025824A (en) * 1990-09-26 1991-06-25 Union Carbide Canada Limited Automatic changeover manifold
US5062443A (en) * 1990-09-26 1991-11-05 Union Carbide Canada Limited Automatic changeover manifold
FR2734341B1 (fr) * 1995-05-18 1997-06-20 Taema Installation de fourniture de gaz sous basse pression
US5632146A (en) * 1996-01-02 1997-05-27 Apt Incorporated Load shaping compressed air system
FR2746898B1 (fr) * 1996-03-26 1998-06-26 Depraetere Raymond Dispositif de distribution de fluide, en particulier de gaz de haute purete
US6581623B1 (en) * 1999-07-16 2003-06-24 Advanced Technology Materials, Inc. Auto-switching gas delivery system utilizing sub-atmospheric pressure gas supply vessels
US6302139B1 (en) * 1999-07-16 2001-10-16 Advanced Technology Materials, Inc. Auto-switching gas delivery system utilizing sub-atmospheric pressure gas supply vessels
US6418958B1 (en) * 2001-04-02 2002-07-16 Betzdearborn, Inc. Dual solid chemical feed system
US6615861B2 (en) 2001-04-20 2003-09-09 Chart Inc. Liquid cylinder manifold system
US6857447B2 (en) 2002-06-10 2005-02-22 Advanced Technology Materials, Inc. Pressure-based gas delivery system and method for reducing risks associated with storage and delivery of high pressure gases
FR2857728B1 (fr) * 2003-07-16 2005-09-30 Cahouet Installation d'alimentation securisee d'un circuit d'utilisation d'un fluide sous pression a partir de deux sources
SE526018C2 (sv) * 2003-09-16 2005-06-14 Lagafors Fabriks Ab Anordning för alstring och upprätthållande av ett önskat tryck/flöde
JP2005321030A (ja) * 2004-05-10 2005-11-17 Toyota Motor Corp 燃料ガス貯蔵供給装置
CN101334129B (zh) * 2008-07-16 2012-06-13 上海大学 定流量流体输送系统
US20100025338A1 (en) * 2008-08-01 2010-02-04 Delaware Capital Formation, Inc. Chemical additive apparatus and methods
GB2500862A (en) * 2012-01-18 2013-10-09 Atlas copco ltd Gas supply system to provide a continuous supply of gas from at least two finite gas sources
US8939166B2 (en) * 2012-07-24 2015-01-27 Air Liquide America Specialty Gases Llc TurbinAL™ high flow CO2 delivery system
JP2015098896A (ja) * 2013-11-19 2015-05-28 ヤマト産業株式会社 ガス供給用自動切替装置
CN104456080A (zh) * 2014-11-14 2015-03-25 武汉钢铁(集团)公司 一种实验室持续供气系统
JP6329688B1 (ja) * 2017-12-21 2018-05-23 株式会社ベスト測器 ガス供給装置
CN111601668B (zh) * 2018-12-21 2023-04-07 金炳俊 利用高压氮气的水管清洗系统及利用其的水管清洗方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2641273A (en) * 1947-10-18 1953-06-09 C O Two Fire Equipment Co Changeover valve
US2741257A (en) * 1953-08-10 1956-04-10 Sr William V Edwards Gas valve
US2768640A (en) * 1953-08-18 1956-10-30 Victor Equipment Co Control for fluid supply manifold
DE1257176B (de) * 1965-02-26 1967-12-28 Draegerwerk Ag Umschaltvorrichtung fuer eine Druckgasversorgungsanlage mit zwei Druckgasbatterien
US3428072A (en) * 1966-03-18 1969-02-18 G & H Products Corp Liquid processing system
FR2206280A1 (en) * 1972-11-10 1974-06-07 Marseille Eaux Water treatment chlorination plant - with automatic continuity of chlorine supply by switching to standby cylinders
US3890992A (en) * 1973-09-27 1975-06-24 Gulde Regelarmaturen Kg Method and apparatus for safeguarding pipe-lines against an inadmissibly high internal compressive load by a control valve with a pneumatic drive
DE2441886A1 (de) * 1974-09-02 1976-03-11 Basi Schoeberl & Co Rastatt Umschalt- und kontrolleinrichtung fuer zentrale gas-versorgungsanlagen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106090602A (zh) * 2016-07-27 2016-11-09 国网江苏省电力公司检修分公司 Gis恒压补气装置

Also Published As

Publication number Publication date
CA1230099A (fr) 1987-12-08
DE3461949D1 (en) 1987-02-12
EP0124405A1 (fr) 1984-11-07
FR2544052B1 (fr) 1985-07-05
JPS6018695A (ja) 1985-01-30
ES8501865A1 (es) 1984-12-01
US4597406A (en) 1986-07-01
FR2544052A1 (fr) 1984-10-12
ATE24756T1 (de) 1987-01-15
ES531310A0 (es) 1984-12-01

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