EP2946110B1 - Dosiervorrichtung zum einbringen eines flüssigen zusatzstoffs in einen strom einer hauptflüssigkeit - Google Patents

Dosiervorrichtung zum einbringen eines flüssigen zusatzstoffs in einen strom einer hauptflüssigkeit Download PDF

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Publication number
EP2946110B1
EP2946110B1 EP13826872.7A EP13826872A EP2946110B1 EP 2946110 B1 EP2946110 B1 EP 2946110B1 EP 13826872 A EP13826872 A EP 13826872A EP 2946110 B1 EP2946110 B1 EP 2946110B1
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EP
European Patent Office
Prior art keywords
venturi
throat
pump
pressure
neck
Prior art date
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Application number
EP13826872.7A
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English (en)
French (fr)
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EP2946110A1 (de
Inventor
Sébastien FURET
Sandrine Lambinet
Philippe Duquennoy
Manal BADII
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Dosatron International SAS
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Dosatron International SAS
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Priority to PL13826872T priority Critical patent/PL2946110T3/pl
Publication of EP2946110A1 publication Critical patent/EP2946110A1/de
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Classifications

    • 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
    • B01F25/3123—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof with two or more Venturi elements
    • B01F25/31232—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof with two or more Venturi elements used simultaneously
    • 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
    • B01F25/3124—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow
    • B01F25/31242—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow the main flow being injected in the central area of the venturi, creating an aspiration in the circumferential part of the conduit
    • 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
    • B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
    • B01F25/3143—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit characterised by the specific design of the injector
    • 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
    • B01F25/316—Injector mixers in conduits or tubes through which the main component flows with containers for additional components fixed to the conduit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
    • F04B13/02—Pumps specially modified to deliver fixed or variable measured quantities of two or more fluids at the same time
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/08—Combinations of two or more pumps the pumps being of different types
    • F04B23/10—Combinations of two or more pumps the pumps being of different types at least one pump being of the reciprocating positive-displacement type
    • F04B23/106—Combinations of two or more pumps the pumps being of different types at least one pump being of the reciprocating positive-displacement type being an axial piston pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/103—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber
    • F04B9/105—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber reciprocating movement of the pumping member being obtained by a double-acting liquid motor
    • F04B9/1053—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber reciprocating movement of the pumping member being obtained by a double-acting liquid motor one side of the double-acting liquid motor being always under the influence of the liquid under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
    • F04F5/10—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing liquids, e.g. containing solids, or liquids and elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
    • F04F5/10—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing liquids, e.g. containing solids, or liquids and elastic fluids
    • F04F5/12—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing liquids, e.g. containing solids, or liquids and elastic fluids of multi-stage type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F04F5/46—Arrangements of nozzles
    • F04F5/461—Adjustable nozzles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F04F5/46—Arrangements of nozzles
    • F04F5/463—Arrangements of nozzles with provisions for mixing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F04F5/48—Control
    • 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
    • B01F25/3125—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characteristics of the Venturi parts
    • B01F25/31251—Throats
    • B01F25/312511—Adjustable Venturi throat

Definitions

  • the invention relates to a metering device for introducing a liquid additive into a main liquid stream flowing in a pipe, a device of the type comprising a reciprocating differential piston pump for withdrawing the additive into a container. and metering it, said pump comprising a first inlet for receiving a main liquid flow which drives the pump, a second inlet for taking the additive and an outlet for the mixture of additive and liquid, the device comprising a venturi installed in the pipe, the pump being connected in parallel with the venturi, the first inlet of the pump being connected by a first pipe to the inlet of the venturi, while the outlet of the pump is connected by a second pipe to the neck venturi.
  • a dosing device of this kind is known from EP 1773479 , on behalf of the Applicant Company, which allows the treatment of high flow rates of main liquid with smaller pumps and increases the permitted range of dosages.
  • the differential piston pumps used in these metering devices are known per se, in particular according to EP 1151196 or US 6684753 .
  • the differential piston reciprocates and drives a plunger to withdraw the additive to be dosed during a rise stroke and to inject this additive into the main liquid or engine liquid during a down stroke.
  • the pressure drop between the first input of the pump and the output is variable depending on the operating phases of the pump.
  • the venturi must be provided to create a pressure drop between its inlet and the neck substantially equal to the pressure drop in the pump.
  • the metering devices of the kind defined above are satisfactory, differences in pressure drop between rise and fall of the differential piston not being too important.
  • the performance of the metering device remains acceptable because the pressure drop between the neck of the venturi and its inlet is not too different from the pressure drop of the pump during the rise and the descent of the differential piston.
  • the object of the invention is, above all, to propose a dosing device of the kind defined above which no longer has or to a lesser degree the disadvantages mentioned above and which makes it possible to optimize the operation, in particular in the case where the Additive dosages are relatively high, especially greater than 0.2% in the main liquid.
  • the means responsive to the pressure drop in the pump is constituted by a means of comparison between the pressure at the neck of the venturi and the pressure at the neck of a second venturi installed on the first pipe leading to the inlet of the pump. .
  • the efficiency of the metering device according to the invention is improved by a better match between the total pressure drop between the inlet and the outlet of the pump and the pressure drop at the neck of the venturi.
  • variable throttle means of the venturi neck preferably comprises a member slidably mounted in a direction inclined relative to the geometric axis of the venturi.
  • the means of comparison between the neck pressures of the two venturi may comprise a movable separation means separating two chambers connected respectively to the neck of one of the two venturis, the organ throttling being related to this movable separating means so that an increase in pressure at the neck of the second venturi relative to the pressure at the neck of the first venturi causes an increase in the neck throat of the first venturi, and vice versa.
  • the mobile separation means comprises a membrane.
  • the sliding member may be constituted by a blade .
  • This blade can be slidably mounted with sufficient clearance in a guide of the venturi body, so that the neck pressure is transmitted to the chamber located on the side of the neck.
  • the throttle member is constituted by a cylindrical rod.
  • the end of the cylindrical rod facing the neck may be substantially hemispherical.
  • the cylindrical shank may be attached to the end of a smaller diameter shank which sealingly traverses a plate closing a chamber connected to the throat of the venturi.
  • a channel is located upstream of the throttle member to provide a pressure tap which allows the flow measurement at the neck of the venturi.
  • the cylindrical rod comprises a longitudinal channel opening at its end close to the neck of the venturi and connected at its other end to a chamber located on the side of the neck of the venturi.
  • the outlet pipe of the pump is connected to the neck of the venturi by at least one lateral opening relative to the attachment of the pipe to the body of the venturi.
  • venturi and the pump form an assembly, with connection means provided at the inlet and the outlet of the venturi for insertion and connection to two sections of the pipe.
  • a dosing device D for introducing a liquid additive A into a main liquid stream L flowing in a pipe 1 roughly represented.
  • the main liquid is usually water but the device D can be suitable for all kinds of liquids.
  • the liquid additive A is contained in a container 2 schematically represented.
  • Device D comprises a pump 3 arranged with its vertical axis.
  • the pump 3 is of a known type, in particular manufactured and marketed by the applicant company. An example of such pumps is described in EP 1 151 196 or US 6,684,753 .
  • the pump 3 comprises a reciprocating differential piston 4 which drives a piston 5 of smaller diameter to withdraw the additive in the container 2 and dose it.
  • the plunger 5 slides in a cylindrical chamber of an auxiliary pump 6 connected by a sampling tube 7 to the container 2.
  • the tube 7 is immersed in the additive A to be withdrawn.
  • the pump 3 comprises a first inlet 8 for receiving a main liquid flow which drives the differential piston 4.
  • the pump 3 comprises a second inlet 9 located in the lower part of the body of the auxiliary pump 6 for sampling the additive A, and an outlet 10 for the mixed mixture of additive A and main liquid L.
  • the device D comprises a venturi 11 installed in the pipe 1.
  • the first inlet 8 of the pump is connected by a first pipe 12 to the inlet of the venturi, while the outlet 10 of the pump is connected by a second pipe 13 to the venturi collar.
  • the pump 3 is thus connected in parallel with the venturi.
  • the device D comprises a variable throttling means E of the neck of the venturi 11, and a means G responsive to the pressure drop in the pump 3 for controlling the throttling means E of the neck of the venturi.
  • variable throttling means E comprises a slide 14 slidably mounted in an inclined direction from upstream to downstream with respect to the geometric axis of the venturi 11. According to Fig.1 the angle of inclination, turned upstream, formed between the blade 14 and the geometric axis of the venturi is about 70 °.
  • the blade 14 is disposed in a substantially cylindrical base 15, projecting from the body of the venturi 11, this base being surmounted by a cover 16.
  • the base and the cover define a cylindrical housing with a geometric axis inclined with respect to the geometric axis of the venturi.
  • the blade 14 is located in a plane orthogonal to the vertical plane passing through the geometric axis of the venturi11.
  • the blade 14 passes through a slot provided in the wall of the neck of the venturi and can project from its lower end 14a in the neck 11c of the venturi.
  • the end 14a as visible on Fig. 6 , is in the shape of a concave arc.
  • the blade 14 slides in a guide of the venturi body with a clearance j ( Fig.
  • the venturi 11 conventionally comprises a convergent, located upstream of the neck 11c, and a divergent downstream of the neck.
  • neck 11c is meant an area of the venturi, whose axial extent may be relatively long, which has a reduced diameter relative to the inlet and outlet diameter.
  • the outlet pipe 13 of the pump is connected by a connection 19 screwed sealingly, with seal, into a threaded hole 20 provided at the periphery of the body of the venturi.
  • the geometric axis of the hole 20 is located in a plane orthogonal to the plane of the blade 14, and passing through the geometric axis of the venturi.
  • the body of the venturi comprises ribs 22 angularly offset by 90 ° and the threaded hole 20 is formed in a cylindrical core 21 of geometric axis orthogonal to that of the venturi and overflowing on either side of a rib 22 to which it connects.
  • the hole 20 does not open directly into the neck of the venturi, from which it is separated in the direction of the geometric axis of the hole 20 by a bottom wall 23.
  • a throat 24 On either side transversely of this wall 23 is provided a throat 24 which opens into the neck of the venturi according to a side window 25 whose angular position is shifted substantially 90 ° relative to the threaded hole 20 for connecting the outlet pipe 13.
  • a valve 26 to break the vacuum is diametrically opposite the connector 19 and communicates with the venturi neck.
  • the means G sensitive to the pressure drop in the pump 3 comprises a means for comparing the pressure at the neck of the venturi 11 and the neck pressure of a second venturi 27 installed on the first pipe 12 leading to the inlet 8 of the pump.
  • the means G is advantageously constituted by the membrane 18 according to the embodiment of the drawings.
  • the second venturi 27 is provided in a block secured to the lid 16.
  • the geometric axis of the venturi 27 is orthogonal to the geometric axis of the first venturi 11.
  • the inlet of the convergent of the second venturi 27 is constituted by an opening opening into the
  • the neck of the second venturi 27 is connected, by a transverse pipe 28, to a chamber 29 provided in the cover 16 and located on the side of the diaphragm 18 remote from the first venturi 11.
  • the divergent venturi 27 is turned towards pump 3 and is connected to the pipe 12.
  • a main liquid stream L flows in line 1 under a static pressure of 1 to 6 bars generally.
  • the flow velocity of the fluid increases and its static pressure decreases.
  • the difference in pressure between the inlet of the venturi 11 and the collar makes it possible to operate the pump 3 and to actuate the differential piston by means of a fraction of the main stream derived by the second venturi 27 and the pipe 12.
  • the auxiliary pump 6 driven by the reciprocating movements of the differential piston 4 takes doses of additive A in the container 2 and the metered mixture is injected into the neck of the venturi via the pipe 13 through the windows 25.
  • the pressure in the chamber 29 becomes greater than that prevailing in the chamber 17 and the membrane 18 is deformed to allow the blade 14 to slide and to enter further into the neck of the venturi 11.
  • the blade 14 and the membrane 18 will oscillate at the speed of the differential piston 4 to ensure a better match between the pressure drop at the neck of the venturi 11 and the total pressure drop in the pump 3.
  • the effectiveness of the dosing device is maintained when the dosages are relatively high, especially greater than 0.2% of additive A in the main flow, and up to 1% in the main flow.
  • the working range of the device according to the invention is enlarged.
  • the low-speed start is made reliable, which makes it possible to start with a low flow rate (in particular the minimum flow rate is 6 to 10 times lower than the maximum flow rate) and increase this flow rate after startup while maintaining a precise dosage and good operating efficiency.
  • Figs. 7-11 an alternative embodiment of the dosing device D can be seen.
  • the elements of this device that are identical or similar to elements already described with respect to the previous embodiment are designated by the same numerical or literal references without their description being repeated.
  • variable throttling means E of the neck of the venturi 11 is constituted by a cylindrical rod 30 slidably mounted in an inclined direction from upstream to downstream on the geometric axis of the venturi 11.
  • the inclination is approximately 50 ° according to the example shown.
  • the cylindrical rod 30 is slidably mounted in a bore 31 of the body of the venturi which opens at the neck.
  • the end 32 of the rod turned towards the neck of the venturi is substantially hemispherical.
  • the rod 30 comprises a longitudinal channel 33, preferably axial, which opens towards the throat of the venturi at the end 32 and which is connected at its other end to a radial duct 34 which opens into the chamber 17 situated on the the membrane 18 facing the venturi.
  • the rod 30 is connected to the membrane 18 which determines, on the side opposite the chamber 17, the other chamber 29 connected to the neck of the second venturi 27 by the pipe 28.
  • the pressure at the neck of the venturi 11 is transmitted to the chamber 17 via the longitudinal channel 30 and the transverse duct 34.
  • the operation of the dosing device Fig. 7-11 is similar to that described in the previous figures.
  • the cylindrical rod 30 with its hemispherical end makes it possible to reduce the turbulence in the flow and to improve the overall efficiency.
  • the pressure tap that makes it possible to measure the flow at the neck 11c of the venturi is provided by a channel 35 located upstream of the rod or cylindrical blade 30a, whose outer wall is continuous.
  • the longitudinal channel of the realization of Fig. 7 is deleted.
  • the cylindrical blade 30a hemispherical lower end 32a, is attached to the end of a rod 36, smaller in diameter than 30a.
  • the membrane 18 is attached to the widened end of the rod 36 remote from the blade 30a.
  • the channel 35 communicates the area of the neck of the venturi 11 with the chamber 17 located under the membrane 18.
  • the rod 36 passes through a plate 37 (FIG. Fig. 14 ) closing the chamber 17 on the side of the neck 11 c of the venturi.
  • the plate 37 is traversed by a passage extending the channel 35 and opening into the chamber 17.
  • a seal on the rod 36 is provided by a sealing ring 38, at the crossing of the plate 37.
  • An improvement in the reaction speed of the blade 30a is obtained thereby reducing the section subjected to pressure prevailing at the venturi neck by providing a seal on the rod 36 of smaller diameter.
  • the blade 30a slides with a sufficient radial clearance in its housing for the passage of the liquid; its front face 32a and its rear face are exposed to the same liquid pressure.
  • variable throat means of the neck of the venturi and the means responsive to the pressure drop in the pump could be constituted by a pivoting throttle flap provided in the neck of the venturi and controlled by the pressure-sensitive means.
  • the membrane 18 could be replaced by a piston movable in a cylindrical housing, defining the two chambers 17 and 29, the displacements of the piston controlling those of the blade 14 or the rod 30.
  • venturi 11 can be adjusted to establish in operation at neck 11 c completely open, at full flow a pressure drop at the neck of 2.6 bars, and obtain a pressure drop of less than 1.5 bars for dosages at 1%.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Measuring Volume Flow (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Accessories For Mixers (AREA)
  • Reciprocating Pumps (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Details Of Reciprocating Pumps (AREA)

Claims (14)

  1. Dosiervorrichtung zum Einleiten eines flüssigen Additivs in einen Hauptflüssigkeitsstrom, der in einer Leitung zirkuliert, mit einer hin und her gehenden Differentialkolbenpumpe (3) zum Entnehmen des Additivs aus einem Behälter und zum Dosieren desselben, wobei die Pumpe einen ersten Einlass (8) zum Aufnehmen einer Hauptflüssigkeitsfördermenge, welche den Antrieb der Pumpe gewährleistet, einen zweiten Einlass (9) zum Entnehmen des Additivs und einen Auslass (10) für das Gemisch aus Additiv und Hauptflüssigkeit aufweist, wobei die Vorrichtung eine in der Leitung angeordnete Venturidüse (11) aufweist, wobei die Pumpe (3) zu der Venturidüse (11) parallelgeschaltet ist, wobei der erste Einlass (8) der Pumpe über einen ersten Kanal (12) mit dem Einlass der Venturidüse verbunden ist, während der Auslass (10) der Pumpe über einen zweiten Kanal (13) mit dem Hals (11c) der Venturidüse verbunden ist, dadurch gekennzeichnet, dass sie aufweist:
    - eine verstellbare Einrichtung (E) zur Verengung des Halses (11c) der Venturidüse;
    - und eine für den Druckverlust in der Pumpe (3) empfindliche Einrichtung (G), die geeignet ist, die Einrichtung (E) zur Verengung des Halses (11c) der Venturidüse zu steuern, um den Durchtrittsquerschnitt zu verringern, wenn der Druckverlust in der Pumpe steigt, und um den Durchtrittsquerschnitt zu vergrößern, wenn der Druckverlust in der Pumpe fällt.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die für den Druckverlust in der Pumpe empfindliche Einrichtung (G) durch eine Einrichtung zum Vergleich zwischen dem Druck am Hals (11c) der Venturidüse (11) und dem Druck am Hals einer zweiten Venturidüse (27), die in dem zum Einlass (8) der Pumpe führenden ersten Kanal (12) eingebaut ist, gebildet ist.
  3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Einrichtung zur Verengung des Halses der Venturidüse ein Element (14, 30, 30a) aufweist, das in eine in Bezug auf die geometrische Achse der Venturidüse (11) geneigte Richtung gleitend bewegbar angebracht ist.
  4. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Einrichtung zum Vergleich der Drücke an den Hälsen der beiden Venturidüsen (11, 27) eine bewegbare Trenneinrichtung aufweist, welche zwei Kammern (17, 29) trennt, die jeweils mit dem Hals einer der beiden Venturidüsen (11, 27) verbunden sind, wobei das Verengungselement mit diesem bewegbaren Trennelement derart verbunden ist, dass ein Anstieg des Drucks am Hals der zweiten Venturidüse (27) relativ zu dem Druck am Hals der ersten Venturidüse (11) eine Zunahme der Verengung des Halses der ersten Venturidüse bewirkt, und umgekehrt.
  5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die bewegbare Trenneinrichtung eine Membran (18) aufweist.
  6. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass das gleitende Element durch eine Lamelle (14) gebildet ist.
  7. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass das Verengungselement durch eine zylindrische Stange (30, 30a) gebildet ist.
  8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass das dem Hals zugewandte Ende (32, 32a) der zylindrischen Stange (30, 30a) im Wesentlichen halbkugelförmig ist.
  9. Vorrichtung nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass die zylindrische Stange (30a) am Ende einer Stange (36) mit kleinem Durchmesser befestigt ist, welche in dichter Weise eine Platte (37) durchquert, die eine mit dem Hals der Venturidüse (11) verbundene Kammer (17) abschließt.
  10. Vorrichtung nach einem der Ansprüche 7 bis 9, dadurch gekennzeichnet, dass sie einen Kanal (35) aufweist, der stromaufwärts des Verengungsorgans (30a) angeordnet ist, um einen Druckanschluss zu gewährleisten, der es ermöglicht, die Durchflussmessung am Hals der Venturidüse durchzuführen.
  11. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass die Lamelle (14) gleitend bewegbar mit einem ausreichenden Spiel (j) in einer Venturidüsenkörperführung angebracht ist, damit der Druck am Hals (11c) an eine Kammer (17) übertragen wird, die seitlich des Halses (11c) der Venturidüse angeordnet ist.
  12. Vorrichtung nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass die zylindrische Stange einen längsverlaufenden Kanal (33) aufweist, der an seinem dem Hals der Venturidüse (11c) benachbarten Ende mündet und an seinem anderen Ende mit einer Kammer (17) verbunden ist, die seitlich des Halses (11c) der Venturidüse angeordnet ist.
  13. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Auslassleitung (13) der Pumpe mit dem Hals der Venturidüse durch mindestens eine in Bezug auf die Befestigung der Leitung an dem Venturidüsenkörper seitliche Öffnung (25) verbunden ist.
  14. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Venturidüse (11) und die Pumpe (3) eine Einheit bilden, wobei Verbindungseinrichtungen am Einlass und am Auslass der Venturidüse (11) für das Einsetzen in und das Verbinden derselben mit zwei Abschnitten der Leitung (1).
EP13826872.7A 2013-01-17 2013-12-17 Dosiervorrichtung zum einbringen eines flüssigen zusatzstoffs in einen strom einer hauptflüssigkeit Active EP2946110B1 (de)

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PL13826872T PL2946110T3 (pl) 2013-01-17 2013-12-17 Urządzenie dozujące do wprowadzania płynnego dodatku do strumienia płynu głównego

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FR1350397A FR3001003B1 (fr) 2013-01-17 2013-01-17 Dispositif de dosage pour introduire un additif liquide dans un courant de liquide principal.
PCT/IB2013/061042 WO2014111770A1 (fr) 2013-01-17 2013-12-17 Dispositif de dosage pour introduire un additif liquide dans un courant de liquide principal

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IL (1) IL239979B (de)
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JP2016509649A (ja) 2016-03-31
NZ710112A (en) 2017-12-22
AU2013373659A1 (en) 2015-08-06
CN105026754B (zh) 2017-04-26
ES2609034T3 (es) 2017-04-18
BR112015016794A2 (pt) 2017-07-11
CA2897457C (fr) 2017-10-17
KR102144559B1 (ko) 2020-08-13
HK1216436A1 (zh) 2016-11-11
AR094500A1 (es) 2015-08-05
IL239979B (en) 2020-08-31
DK2946110T3 (en) 2017-02-06
EP2946110A1 (de) 2015-11-25
MX2015009227A (es) 2016-04-25
CN105026754A (zh) 2015-11-04
EA027193B1 (ru) 2017-06-30
AU2013373659B2 (en) 2016-12-22
FR3001003B1 (fr) 2015-03-20
FR3001003A1 (fr) 2014-07-18
PL2946110T3 (pl) 2017-06-30
KR20150110578A (ko) 2015-10-02
PT2946110T (pt) 2017-01-13
CA2897457A1 (fr) 2014-07-24
MY182941A (en) 2021-02-05
US20150361994A1 (en) 2015-12-17
IL239979A0 (en) 2015-08-31
US10197071B2 (en) 2019-02-05
HUE031933T2 (en) 2017-08-28
EA201591336A1 (ru) 2015-11-30
SG11201505583SA (en) 2015-08-28
MX370015B (es) 2019-11-28
WO2014111770A1 (fr) 2014-07-24
JP6300825B2 (ja) 2018-03-28
WO2014111770A8 (fr) 2015-09-03

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