GB1411078A - Gas mixing apparatus - Google Patents

Gas mixing apparatus

Info

Publication number
GB1411078A
GB1411078A GB5074671A GB5074671A GB1411078A GB 1411078 A GB1411078 A GB 1411078A GB 5074671 A GB5074671 A GB 5074671A GB 5074671 A GB5074671 A GB 5074671A GB 1411078 A GB1411078 A GB 1411078A
Authority
GB
United Kingdom
Prior art keywords
pressure
oxygen
valve
mixing chamber
bars
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
GB5074671A
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.)
BOC Group Ltd
Original Assignee
BOC International Ltd
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 BOC International Ltd filed Critical BOC International Ltd
Priority to GB5074671A priority Critical patent/GB1411078A/en
Priority to AU47773/72A priority patent/AU471858B2/en
Priority to IT31153/72A priority patent/IT987579B/en
Priority to FR7238627A priority patent/FR2161941B1/fr
Publication of GB1411078A publication Critical patent/GB1411078A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/02—Divers' equipment
    • B63C11/18—Air supply
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/10—Mixing gases with gases
    • B01F23/19—Mixing systems, i.e. flow charts or diagrams; Arrangements, e.g. comprising controlling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/21—Measuring
    • B01F35/211—Measuring of the operational parameters
    • B01F35/2113—Pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/22—Control or regulation
    • B01F35/221—Control or regulation of operational parameters, e.g. level of material in the mixer, temperature or pressure
    • B01F35/2211—Amount of delivered fluid during a period
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/22—Control or regulation
    • B01F35/221—Control or regulation of operational parameters, e.g. level of material in the mixer, temperature or pressure
    • B01F35/2213—Pressure

Abstract

1411078 Mixing gases BOC INTERNATIONAL LTD 29 Sept 1972 [1 Nov 1971] 50746/71 Heading B1C Apparatus for supplying oxygen and helium in pre-set fixed proportion to a mixing chamber 28 and thence through a valve 46 to a diving chamber (not depicted) comprises a helium supply line 2 and a selected one of the oxygen supply lines 6, 8, or 10, each having a non- return valve 12, a gas-pressure regulator 14, a pressure-relief valve 16, a device 20 providing a constant downstream gas velocity over a range of pressure differences, and a solenoid valve 22. The pressure regulators 14 reduce the pressures in each line to the same constant value and the device 20 is preferably a sonic nozzle (see Fig 2, not shown) the gas velocity downstream of which is equal to the speed of sound irrespective of variations within a range of pressure differences across the nozzle. The solenoid valves 22 are controlled by devices 34, 36 sensitive to the pressure in the mixing chamber, so that when pressure in the mixing chamber falls owing to demand the valves 22 are opened, and when it rises to the critical valve which could impair the functioning of the sonic nozzle, the valves 22 are closed. The three oxygen lines 6, 8, 10 each provide a different oxygen flow rate so that three helium/ oxygen compositions are available, typically 3%, 5% and 8% oxygen. The supply pressures may be 70-250 bars which are reduced to 60 bars by the regulators 14, and the pressure in the mixing chamber is 27-30 bars.
GB5074671A 1971-11-01 1971-11-01 Gas mixing apparatus Expired GB1411078A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB5074671A GB1411078A (en) 1971-11-01 1971-11-01 Gas mixing apparatus
AU47773/72A AU471858B2 (en) 1971-11-01 1972-10-16 Gas mixing apparatus
IT31153/72A IT987579B (en) 1971-11-01 1972-10-31 EQUIPMENT FOR MIXING TWO OR MORE CURRENTS OF GAS
FR7238627A FR2161941B1 (en) 1971-11-01 1972-10-31

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5074671A GB1411078A (en) 1971-11-01 1971-11-01 Gas mixing apparatus

Publications (1)

Publication Number Publication Date
GB1411078A true GB1411078A (en) 1975-10-22

Family

ID=10457191

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5074671A Expired GB1411078A (en) 1971-11-01 1971-11-01 Gas mixing apparatus

Country Status (4)

Country Link
AU (1) AU471858B2 (en)
FR (1) FR2161941B1 (en)
GB (1) GB1411078A (en)
IT (1) IT987579B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0503996A1 (en) * 1991-03-01 1992-09-16 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Critical orifice dilution system and method
US5261452A (en) * 1991-03-01 1993-11-16 American Air Liquide Critical orifice dilution system and method
ITMI20150548A1 (en) * 2015-04-15 2016-10-15 Cryotek Eng S R L DOUBLE PARTITION MIXER OF GASEOUS FLUIDS
WO2017077271A1 (en) * 2015-11-03 2017-05-11 Norgren Limited Electropneumatic gas mixing valve and pressure controller

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2631856B1 (en) * 1988-05-31 1991-09-13 Rhone Poulenc Chimie PROCESS FOR MIXING AND COMPRESSING GAS, WITH CONTROLLED FLOW, STABLE IN FLOW AND IN COMPOSITION, FROM AT LEAST TWO PRESSURE SOURCES
FR2811909A1 (en) * 2000-07-18 2002-01-25 Air Liquide Sante France Gas conditioning unit includes gas lines merging into one mixing chamber, having a upstream portion divided into parallel lines carrying an electro-valve

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0503996A1 (en) * 1991-03-01 1992-09-16 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Critical orifice dilution system and method
US5261452A (en) * 1991-03-01 1993-11-16 American Air Liquide Critical orifice dilution system and method
ITMI20150548A1 (en) * 2015-04-15 2016-10-15 Cryotek Eng S R L DOUBLE PARTITION MIXER OF GASEOUS FLUIDS
WO2017077271A1 (en) * 2015-11-03 2017-05-11 Norgren Limited Electropneumatic gas mixing valve and pressure controller

Also Published As

Publication number Publication date
IT987579B (en) 1975-03-20
FR2161941B1 (en) 1977-12-23
AU471858B2 (en) 1976-05-06
FR2161941A1 (en) 1973-07-13
AU4777372A (en) 1974-04-26

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee