EP0243104B1 - Système d'injection de fluide - Google Patents

Système d'injection de fluide Download PDF

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Publication number
EP0243104B1
EP0243104B1 EP87303382A EP87303382A EP0243104B1 EP 0243104 B1 EP0243104 B1 EP 0243104B1 EP 87303382 A EP87303382 A EP 87303382A EP 87303382 A EP87303382 A EP 87303382A EP 0243104 B1 EP0243104 B1 EP 0243104B1
Authority
EP
European Patent Office
Prior art keywords
fluid
volume
enclosure
line
venturi
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 - Lifetime
Application number
EP87303382A
Other languages
German (de)
English (en)
Other versions
EP0243104A2 (fr
EP0243104A3 (fr
Inventor
Raymond Lawrence Down
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.)
Fluid Techology Ltd
Original Assignee
Fluid Techology 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
Priority claimed from AU71573/87A external-priority patent/AU589763B2/en
Application filed by Fluid Techology Ltd filed Critical Fluid Techology Ltd
Publication of EP0243104A2 publication Critical patent/EP0243104A2/fr
Publication of EP0243104A3 publication Critical patent/EP0243104A3/fr
Application granted granted Critical
Publication of EP0243104B1 publication Critical patent/EP0243104B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
    • B05B7/2481—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device with a flexible container for liquid or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B01F25/3121—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof with additional mixing means other than injector mixers, e.g. screens, baffles or rotating elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/315—Injector mixers in conduits or tubes through which the main component flows wherein a difference of pressure at different points of the conduit causes introduction of the additional component into the main component
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
    • B05B7/244—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using carrying liquid for feeding, e.g. by suction, pressure or dissolution, a carried liquid from the container to the nozzle
    • B05B7/2443—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using carrying liquid for feeding, e.g. by suction, pressure or dissolution, a carried liquid from the container to the nozzle the carried liquid and the main stream of carrying liquid being brought together downstream of the container before discharge
    • B05B7/2445—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using carrying liquid for feeding, e.g. by suction, pressure or dissolution, a carried liquid from the container to the nozzle the carried liquid and the main stream of carrying liquid being brought together downstream of the container before discharge and a secondary stream of carrying liquid being brought together in the container or putting the carried liquid under pressure in the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/26—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device
    • B05B7/28—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device in which one liquid or other fluent material is fed or drawn through an orifice into a stream of a carrying fluid
    • 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
    • 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
    • B01F23/20—Mixing gases with liquids
    • B01F23/21—Mixing gases with liquids by introducing liquids into gaseous media
    • 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
    • B01F23/40—Mixing liquids with liquids; Emulsifying

Definitions

  • the present invention relates to a fluid injection system for injecting a first fluid into a body of a second fluid.
  • Prior art fluid injection systems are known, for example, from US-A-2,563,211, which discloses a large fixed apparatus for use in supplying water flow to swimming pools or drinking supply.
  • US-A-3,166,096 discloses a fluid injection system in which a disposable bag containing detergent may be placed inside a vessel which is connected to a fixed metering apparatus which is mounted within a washing machine.
  • a fluid delivery and metering apparatus for delivering a metered flow of a second fluid into a first fluid, said apparatus comprising:
  • a fluid line 10 through which, in use, a fluid flows under pressure. Coupled within the fluid line 10 is a tubular member 12. Each end of the fluid line 10 is connected to the adjacent end of the tubular member 12 by any convenient means.
  • the tubular member 12 contains a venturi 14 arranged to cause a pressure drop in fluid flowing through the fluid line 10 in the direction shown by the arrow 16.
  • the tubular member 12 also contains two orifices 18 and 20 on the high and low pressure sides of the venturi 14 respectively.
  • a first conduit 22 extends from the orifice 18 to a pressure tank 24.
  • the pressure tank 24 is of rigid construction.
  • the pressure tank 24 is bucket shaped having a base 26 with an upstanding peripheral wall 28.
  • the conduit 22 enters the pressure tank 24 through its base 26.
  • the pressure tank 24 also contains a bladder or diaphragm or membrane 30 which is of similar shape to the pressure tank 24 and is thus also bucket shaped.
  • the bladder 30 has an upper peripheral flange remote from its base. This flange is clamped between an upper outwardly flared end of the peripheral wall 28 of the pressure tank 24 and a lid 32 by any suitable means such as threaded bolts.
  • the bladder 30 has a resilient wall.
  • the bladder 30 may be formed of neoprene or rubber or any flexible material not degraded by the fluids.
  • a first volume is defined by the pressure tank 24 and the bladder 30 and a second volume is defined by the bladder 30 and the lid 32.
  • a shuttle valve 34 is mounted above the lid 32. The shuttle valve 34 communicates with the interior of the pressure tank 24 through a short pipe 36 which passes through the lid 32. Further, the shuttle valve 34 is in communication with a reservoir 37 through a pipe 38 which passes through the underside of the reservoir 37. The reservoir 37 is provided with a breather 39. A metering line 40 also extends from the shuttle valve 34. In use, the shuttle valve 34 performs such that when no bulk fluid is passing through the fluid line 10 fluid passes under gravity from the reservoir 37 through the pipes 38 and 36 to fill up the bladder 30.
  • the rate of injection varies approximately according to the rate of flow.
  • the amount of second fluid injected per volume of first fluid remains substantially constant.
  • the minimum flow rate in the fluid line 10 is sufficient to generate a driving pressure differential that will displace the second fluid.
  • the tank 24 can be connected in reverse whereby the bladder 30 is in fluid communication with the conduit 22 and the tank 24 is in fluid communication with the conduit 40. In this case, the bladder 30 expands to expell the second fluid from the tank 24.
  • the separator instead of being in the form of a flexible member, could be in the form of a piston or other member that moves displacing the first and second fluids.
  • the rate of injection of the second fluid into the first fluid may be varied by means of a by-pass conduit 50 which interconnects the conduit 22 with the line 40.
  • the presence of the conduit 50 causes the first, bulk fluid to flow from the conduit 22 into the line 40 as an alternative to the flow of the second fluid. This inhibits or proportionately displaces the flow of the second, additive fluid into the venturi.
  • the by-pass conduit 50 contains an adjustable valve 52.
  • the valve 52 controls the rate of flow of the first, bulk fluid in the conduit 50. As the valve 52 is opened to increase the rate of flow of the first fluid, the rate of flow of the second fluid through the line 40 is decreased and vice versa.
  • valve 52 may be substituted by a fixed constriction calibrated to a desired rate.
  • the constriction may be a plug partially restricting the by-pass flow. It may also be a multiposition plug for multiple, pre-set rates of flow.
  • the system may be extended further to incorporate adjustment to the venturi or constriction the purpose of which is to modify the pressure differential (for a given flow rate) and thereby change the range over which the second fluid line and by-pass control the rate of dosing.
  • the means of adjusting the venturi could be by mechanical adjustment of a flexible surfaced opening, by sphincter action, or by pumping additional volume of the first fluid into the eye of the venturi. This latter has been found to control the venturi constriction.
  • the system of Figure 1 has a wide variety of uses.
  • the system of the present invention provides a safe method of handling highly flammable bulk fluids.
  • the system of Figure 1 may also be used for metering liquid additives into bulk fluids in gaseous form such as the adding of lubricating oil to compressed air flowing to energise pneumatic tools that require constant lubrication such as pneumatic hammers on drilling machinery.
  • FIG. 2 of the accompanying drawings there is shown schematically the fluid injection system utilised by the apparatus of the present invention.
  • the system of Fig. 2 is a modification of the system of Fig 1.
  • Like reference numerals are used to denote like parts between Figs 1 and 2.
  • the reservoir 37, the pipe 36 and 38 and the shuttle valve 40 are omitted.
  • the metering line 40 leads directly from the bladder 30 through the lid 32 of the tank 24 to the orifice 20.
  • the system of Fig. 2 may have a venturi orifice of adjustable size.
  • Fig 2 operates in essentially the same manner as that of Fig 1 as described above.
  • the system of Fig 2 is envisaged to be a disposable system whereby once all of the second, additive fluid has been expelled from the bladder 30 the entire apparatus will be discarded and replaced by a fresh apparatus in which the bladder 30 is filled with the second additive fluid.
  • the system of Fig 2 may be used in the same applications as that of Fig 1. However, because of its disposable characteristics it is useful in other applications.
  • the system of Fig 2 is particularly envisaged for use with knap sack sprays which are typically used for spraying herbicides or pesticides.
  • the active ingredient to be sprayed would be contained in concentrated form in the bladder 30 and the bulk fluid would be water carried in a portable tank.
  • the bladder 30 could be so designed that the operator need never contact the concentrated active ingredient.
  • the bladder 30 could be incorporated in a cheap disposable assembly including the entire system of Fig 2 which would be discarded when the bladder 30 was empty.
  • FIG 3 there is shown a particular embodiment of an apparatus according to the invention constructed utilising the injection system of Figure 2.
  • Like reference numerals denote like parts.
  • the tank 24 is in the form of a clear plastics bottle and the bladder 30 is in the form of a plastics bag or the like.
  • the bottle is sealed off at the neck by a moulded plastics cap 160.
  • the cap 160 is permanently sealed to the bottle 24.
  • the cap 160 comprises a female end 164 for fitting to a hand wand (not shown) and a male end 162 for fitting to a hose or knap sack of known type (not shown).
  • An apertured tube 166 depends from the cap 160. The tube 166 ensures that the bag 30 is unfurled in the bottle 24 and also acts as a feed tube in use.
  • the cap 160 also comprises an on-off cock 168.
  • the cock 168 must be on and water must be flowing through the cap 160 from the male end to the female end to cause chemicals to be released from the bag 30.
  • the cap 160 also comprises a chemical filler port 170 through which chemical is inserted into the bag 30. After the bag 30 is full the port 170 is permanently sealed.
  • the cap 160 contains all of the components 12, 14, 18, 20, 22, 40, 50 and 52 of Figure 2.
  • valve 52 when water flows from a hose or knap sack through the cap 160 from the end 162 to the end 164, the concentrate in the bag 30 is expelled into the water at a desired, consistant concentration as determined by the setting of the valve 52.
  • the valve 52 may be permanently set at a particular desired setting. It is also envisaged that in some applications the valve 52 could have, say two positions which could be obtained by a manual switching device.
  • FIG 4 A particular neck construction for the apparatus of Figure 3 is shown in Figure 4.
  • the bag 30 is sealed to the tube 166 by means of an "O" ring 179.
  • a neck plug 182 with the tube 166 extending through it rests on the neck 180 and closes it off and is sealed to the bottle 24.
  • a sealing collar 186 is then clamped around the neck 189 and the assembly.
  • the open end of the bag 30 is sealed to the tube 166 by means of the "O"ring 179 or other seal so that once the filler port 170 is sealed the concentrate cannot escape except by rupture of the bottle 24.
  • the bottle 24 may be made of impact resistant plastics material.
  • the clear nature of the bottle enables a visual observation to be made of the amount of chemical remaining in the bag 30.
  • shown in Figure 4 is the dosing line 40, the by-pass 50 or the valve 52 which can be seen more clearly in Figure 5.
  • the by-pass line 50 and the valve 52 serve to displace the cencentrate thereby changing the dose rate from the line 40.
  • the control valve 52 may be replaced by specific plugs that restrict the flow in the by-pass line 50 to a desired rate of control.
  • FIG 6 there is shown a knap sack spray head 190 fitted with an adapter 192 which is shown to an enlarged scale in Figure 7.
  • the spray head 190 comprises a wand 194 into which the adapter 192 is fitted.
  • the adapter 192 comprises a first internally threaded end tube 196 and a second externally threaded end tube 198.
  • the tubes 196 and 198 are arranged to be fitted to outer and inner ends of the knap sack wand 194 respectively.
  • the tubes 196 and 198 are rigidly interconnected by a bridging member 200 such that under the bridging member 200 there is a gap between the tubes 196 and 198.
  • the tube 198 is spring biased by a coil spring 202 to a rest position.
  • the cap 160 of the apparatus of Figure 4 can be engaged with the tubes 196 and 198 by pressing the tube 198 against the spring 20 to widen the gap between the tubes 196 and 198 and then inserting the cap 160 into the gap. Then the tube 198 can be released so that the tube 198 sealingly engages with the female fitting 164 and the tube 196 sealingly engages with the male fitting 162.
  • the bottle 24 of Figure 3 can be readily clipped into a knap sack wand or a hose line and used until the concentrate is exhausted at which time the bottle 24 is removed by the reverse of the procedure described above and replaced by a fresh bottle.
  • the plug 170 may be used as a "dead-mans-hand". That is, unless the plug 170 is depressed, the plug 170 rises to cut off the flow in the concentrate flow tube 166.
  • venturi could be in the form of an invert venturi in which a solid member is disposed in the centre of a pipe or tube to form a constriction.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Catching Or Destruction (AREA)
  • Nozzles (AREA)

Claims (6)

  1. Un appareil pour la distribution et le dosage d'un fluide pour distibuer un écoulement dosé d'un second fluide dans un premier fluide, ledit appareil comprenant:
    un élément tubulaire (12) disposé pour faire partie d'une ligne d'écoulement de fluide à travers laquelle le premier fluide s'écoule sous pression;
    un venturi (14) placé à l'intérieur de l'élément tubulaire (12) définissant ses côtés (18, 20) de haute et de basse pression;
    un premier volume disposé pour contenir le premier fluide;
    un second volume disposé pour contenir le second fluide;
    une conduite (22) établissant une communication entre le côté de haute pression (18) du dit venturi (14) et ledit premier volume;
    une ligne de dosage (40) établissant une communication entre ledit second volume et le côté de basse pression (20) du dit venturi (14) par laquelle, lorsque l'on crée un différentiel de pression à travers ledit venturi (14) dû à un écoulement du dit premier fluide à travers ledit élément tubulaire (12), ledit premier fluide vient s'écouler dans ledit premier volume diminuant ainsi ledit second volume et déplaçant par conséquent le second fluide dans la ligne de dosage (40); et
    une conduite de dérivation (50) fournie entre le côté de haute pression (18) du venturi (14) et la ligne de dosage (40) pour permettre la distribution du premier fluide dans la ligne de dosage (40) intermédiaire du second volume et de l'élément tubulaire (12);
    dans lequel un volume comprend une première chambre (24) et l'autre volume comprend une seconde chambre (30), l'une des dites première et seconde chambres (24, 30) étant disposée considérablement à l'intérieur de l'autre des dites première et seconde chambres (24, 30), lesdits premier et second volumes étant séparés l'un de l'autre par un moyen sensible à la pression (30) comprenant un élément mobile placé à l'intérieur de la chambre externe des dites première et seconde chambres (24, 30) et définissant au moins une partie des parois de la chambre interne des dites première et seconde chambres (24, 30), la chambre externe des dites première et seconde chambres (24, 30) comprenant une enceinte rigide ayant une ouverture (180);
    et par laquelle ledit écoulement du dit premier fluide dans ledit premier volume déplace le moyen sensible à la pression (30) diminuant ainsi ledit second volume et déplaçant par conséquent le second fluide dans la ligne de dosage (40);
    ledit appareil étant caractérisé en ce que:
    la chambre interne des dites première et seconde chambres (24, 30) comprend une enceinte flexible en forme de sac placée à l'intérieur de l'enceinte rigide;
    ledit élément tubulaire (12) faisant partie d'un élément de fermeture (160), ledit élément de fermeture comprenant aussi ladite conduite (22), ladite ligne de dosage (40) et ladite conduite de dérivation (50), chaque extrêmité de l'élément tubulaire (12) étant adaptée pour pouvoir être connectée sur une ligne d'écoulement à un lecteur manuel ou à un tuyau flexible; et
    ledit élément de fermeture (160) est adapté pour être emboíté de façon étanche et permanente dans l'ouverture (180) de l'enceinte rigide.
  2. Un appareil d'injection de fluide selon la revendication 1 dans lequel ladite conduite de dérivation (50) comprend un moyen de contrôle de l'écoulement (52) qui détermine le taux de distribution du premier fluide dans la ligne de dosage (40).
  3. Un appareil d'injection de fluide selon la revendication 1 ou la revendication 2 dans lequel la conduite de dérivation (50) s'étend entre la conduite (22) et la ligne de dosage (40).
  4. Un appareil selon l'une quelconque des revendications précédentes dans lequel ladite première chambre (24) comprend une enceinte en forme de bouteille et ladite seconde chambre (30) comprend une enceinte flexible en forme de sac placée à l'intérieur de l'enceinte en forme de bouteille.
  5. Un appareil selon l' une quelconque des revendications 1 à 3 dans lequel ladite seconde chambre (30) comprend une enceinte en forme de bouteille et ladite première chambre (24) comprend une enceinte flexible en forme de sac placée à l'intérieur de l'enceinte en forme de bouteille.
  6. Un appareil selon l'une quelconque des revendications précédentes dans lequel ledit venturi (14) a un orifice de taille réglable.
EP87303382A 1986-04-18 1987-04-16 Système d'injection de fluide Expired - Lifetime EP0243104B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
AU5527/86 1986-04-18
AUPH552786 1986-04-18
AUPH969586 1986-12-30
AU9695/86 1986-12-30
AU71573/87A AU589763B2 (en) 1986-04-18 1987-04-15 Fluid injection system

Publications (3)

Publication Number Publication Date
EP0243104A2 EP0243104A2 (fr) 1987-10-28
EP0243104A3 EP0243104A3 (fr) 1989-08-02
EP0243104B1 true EP0243104B1 (fr) 1998-07-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP87303382A Expired - Lifetime EP0243104B1 (fr) 1986-04-18 1987-04-16 Système d'injection de fluide

Country Status (1)

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EP (1) EP0243104B1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH675697A5 (fr) * 1988-09-26 1990-10-31 Sandoz Ag
DE19654514A1 (de) * 1996-12-27 1998-07-02 Itw Oberflaechentechnik Gmbh Sprühbeschichtungseinrichtung
US6446578B1 (en) 1997-09-24 2002-09-10 Maxim Products Limited Spraying methods and apparatus
DE19907362C2 (de) * 1999-02-20 2003-04-17 Draeger Medical Ag Verfahren zum Mischen von Sauerstoff mit Luft in einem Beatmungsgerät mit einer Venturi-Düse
RU2740020C2 (ru) * 2017-02-14 2020-12-30 Общество с ограниченной ответственностью научно-исследовательский и проектный институт "ПЕГАЗ" Блок весового дозирования жидких реагентов

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1051306A (fr) * 1900-01-01
DE323415C (de) * 1918-10-24 1920-07-27 Oskar Ritschel Selbsttaetiger Druckleitungs-Differential-Mischapparat
US2058508A (en) * 1934-08-13 1936-10-27 Standard Oil Co California Proportional odorizer
DE860717C (de) * 1949-08-25 1952-12-22 Nat Coal Board Fluessigkeits-Teilvorrichtung
FR1006897A (fr) * 1949-12-10 1952-04-28 Perfectionnement apportés à un mélangeur de deux fluides applicable aux brûleurs à gaz
DE1023597B (de) * 1951-04-26 1958-01-30 Dopslaff Julius Kg Mischvorrichtung fuer verschiedene Fluessigkeiten bzw. Fluessigkeiten mit Gasen
DE1197065B (de) * 1960-10-03 1965-07-22 Helmut Lang Vorrichtung zum mengenproportionalen Einbringen von fluessigen Zusaetzen in einen Fluessigkeitsstrom und Behaelter fuer die Zusatz-fluessigkeit
FR2265445A1 (en) * 1974-03-25 1975-10-24 Gaz De France Free flow odouriser for gases - giving warning by smell of gas able to cause pollution or explosion
DE2629609C2 (de) * 1976-07-01 1985-07-25 R. und D. Rotter GmbH med.chem. Apparate- und Anlagenbau, 6086 Riedstadt Zumischgerät

Also Published As

Publication number Publication date
EP0243104A2 (fr) 1987-10-28
EP0243104A3 (fr) 1989-08-02

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