EP2946110A1 - Dispositif de dosage pour introduire un additif liquide dans un courant de liquide principal - Google Patents
Dispositif de dosage pour introduire un additif liquide dans un courant de liquide principalInfo
- Publication number
- EP2946110A1 EP2946110A1 EP13826872.7A EP13826872A EP2946110A1 EP 2946110 A1 EP2946110 A1 EP 2946110A1 EP 13826872 A EP13826872 A EP 13826872A EP 2946110 A1 EP2946110 A1 EP 2946110A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- venturi
- neck
- pump
- inlet
- pipe
- 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.)
- Granted
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 34
- 239000000654 additive Substances 0.000 title claims abstract description 30
- 230000000996 additive effect Effects 0.000 title claims abstract description 30
- 230000007423 decrease Effects 0.000 claims abstract description 6
- 239000012528 membrane Substances 0.000 claims description 15
- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims description 2
- 210000003739 neck Anatomy 0.000 claims 19
- 238000009530 blood pressure measurement Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 5
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000003556 assay Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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 metering device of this kind is known from EP 1773479, in the name of the applicant company, which makes it possible to treat high flow rates of the main liquid with pumps of reduced dimensions and to increase the permitted range of dosages.
- the differential piston pumps used in these metering devices are known per se, in particular according to EP 1 151 196 or US Pat. No. 6,684,753.
- 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.
- a dosing device of the kind defined above is characterized in that it comprises:
- variable means of constriction of the neck of the venturi
- a means responsive to the pressure drop in the pump capable of controlling the throat neck throttling means to reduce the flow section when the pressure drop in the pump increases, and to increase the flow section when the pressure drop in the pump decreases.
- 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.
- Fig. 1 is a vertical longitudinal section of a metering device according to the invention with parts outside and parts shown schematically.
- Fig. 2 is a simplified schematic view, with parts torn off, of a differential piston pump of the type used in the device of FIG. the invention.
- Fig. 3 is a perspective view of the dosing device of FIG. 1, on a smaller scale.
- Fig. 4 is an enlarged view of the detail IV of FIG. 1 showing a fitting in an orifice of the venturi body.
- Fig. 5 is a view from above with respect to FIG. 4, the coupling having been removed.
- Fig. 6 is a section on a larger scale in a plane orthogonal to the plane of FIG. 1, and passing through the median plane of the throttle means constituted by a blade.
- Fig. 7 shows, similarly to FIG. 1, an alternative embodiment of the metering device according to the invention, with a throttle member constituted by a cylindrical rod.
- Fig. 8 is a perspective view on a smaller scale of the device of FIG. 7.
- Fig. 9 shows, on a larger scale, the detail IX of FIG. 7.
- Fig. 10 is a view from above with respect to FIG. 9, the coupling having been removed.
- Fig. 1 1 is a section of the stem on a larger scale, similar to the section of Fig.6.
- Fig. 12 shows, in vertical longitudinal section, a variant of the metering device of FIG. 7, with solid cylindrical rod as throttle.
- Fig. 13 is a section along the line XIII-XIII of FIG. 12, on a larger scale, and
- Fig. 14 is an enlarged detail of FIG. 13.
- a metering device D for introducing a liquid additive A into a main liquid stream L flowing in a pipe 1 briefly shown.
- 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.
- Device D comprises a venturi 1 1 installed in line 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 neck of the venturi.
- 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 venturi neck. .
- 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 1 1. According to FIG. 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 January 1, this base being surmounted by a cover 16.
- the base and the cover define a cylindrical housing of 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 venturil 1.
- 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 1 1 c of the venturi.
- the end 14a as visible in FIG. 6, is in the form of a concave arc.
- Venturi January 1 in a conventional manner comprises a convergent, located upstream of the neck 1 1 c, and a divergent downstream of the neck.
- neck 1 1 c 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 projecting 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 venturi neck according to a side window 25 whose angular position is offset 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 means for comparing the pressure at the neck of the venturi 1 1 and the neck pressure of a second venturi 27 installed on the first pipe 12 leading to the inlet 8 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 convergent inlet of the second venturi 27 is constituted by an opening opening into the inlet of the venturi 1 1.
- 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 membrane 18 remote from the first venturi January 1.
- the divergent venturi 27 is turned towards the 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 1 1 and the neck 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 further enter the neck of the venturi January 1.
- the blade 14 and the diaphragm 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 1 1 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.
- variable throttling means E of the neck of the venturi 1 1 is constituted by a cylindrical rod 30 slidably mounted in a direction inclined from upstream to downstream on the geometric axis of the venturi January 1.
- the inclination is about 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 1 1 is transmitted to the chamber 17 by the longitudinal channel 30 and the transverse duct 34.
- the operation of the dosing device of FIGS. 7-1 1 is similar to that described with reference to the preceding 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.
- FIGS. 7-1 an advantageous embodiment of the dosing device of FIGS. 7-1 1.
- the elements identical to elements of FIG. 7-1 1 are designated by the same numerical or literal references, without their description being repeated.
- the pressure tap which makes it possible to measure the flow rate at the neck 1 1c of the venturi is provided by a channel 35 located upstream of the cylindrical rod or blade 30a, whose outer wall is continuous.
- the longitudinal channel of the embodiment 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 venturi neck 1 1 with the chamber 17 located under the membrane 18.
- the rod 36 passes through a plate 37 (FIG 14) closing the chamber 17 on the side of the neck 1 1 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.
- the invention is not limited to the embodiments described with reference to the drawings, but it encompasses the possible variants of the variable throat means of the neck of the venturi and the means responsive to the pressure drop in the pump.
- the throttling means 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.
- the geometry of the venturi 11 can be adjusted to establish in operation at neck 11c fully open, at full flow a head loss of 2.6 bar neck, and obtain a pressure drop of less than 1.5 bar for dosages at 1%.
Landscapes
- 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)
- Details Of Reciprocating Pumps (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL13826872T PL2946110T3 (pl) | 2013-01-17 | 2013-12-17 | Urządzenie dozujące do wprowadzania płynnego dodatku do strumienia płynu głównego |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
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 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2946110A1 true EP2946110A1 (fr) | 2015-11-25 |
EP2946110B1 EP2946110B1 (fr) | 2016-11-23 |
Family
ID=48289289
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13826872.7A Active EP2946110B1 (fr) | 2013-01-17 | 2013-12-17 | Dispositif de dosage pour introduire un additif liquide dans un courant de liquide principal |
Country Status (23)
Country | Link |
---|---|
US (1) | US10197071B2 (fr) |
EP (1) | EP2946110B1 (fr) |
JP (1) | JP6300825B2 (fr) |
KR (1) | KR102144559B1 (fr) |
CN (1) | CN105026754B (fr) |
AR (1) | AR094500A1 (fr) |
AU (1) | AU2013373659B2 (fr) |
BR (1) | BR112015016794A2 (fr) |
CA (1) | CA2897457C (fr) |
DK (1) | DK2946110T3 (fr) |
EA (1) | EA027193B1 (fr) |
ES (1) | ES2609034T3 (fr) |
FR (1) | FR3001003B1 (fr) |
HK (1) | HK1216436A1 (fr) |
HU (1) | HUE031933T2 (fr) |
IL (1) | IL239979B (fr) |
MX (1) | MX370015B (fr) |
MY (1) | MY182941A (fr) |
NZ (1) | NZ710112A (fr) |
PL (1) | PL2946110T3 (fr) |
PT (1) | PT2946110T (fr) |
SG (1) | SG11201505583SA (fr) |
WO (1) | WO2014111770A1 (fr) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3001003B1 (fr) * | 2013-01-17 | 2015-03-20 | Dosatron International | Dispositif de dosage pour introduire un additif liquide dans un courant de liquide principal. |
FR3016132B1 (fr) * | 2014-01-06 | 2016-02-05 | Groupe Leader | Premelangeur et installation associee |
FR3016302B1 (fr) * | 2014-01-10 | 2016-02-05 | Dosatron International | Melangeur statique pour homogeneiser un melange d'au moins deux liquides et dispositif de dosage equipe d'un tel melangeur |
EP3344102A4 (fr) * | 2015-06-30 | 2019-06-19 | Control Wizard Pty Ltd. | Appareil de traitement de surface, filtre et composants associés |
FR3042235B1 (fr) * | 2015-10-13 | 2020-03-27 | Dosatron International | Machine hydraulique et pompe doseuse reversible equipee d'une telle machine |
FR3054004B1 (fr) * | 2016-07-13 | 2018-08-24 | Dosatron International | Mecanisme de dosage d'une pompe a dosage proportionnel, pompe et procede de mise en œuvre associes |
MX2018005056A (es) * | 2017-07-19 | 2019-03-28 | Chapin Mfg Inc | Dispositivo de tubo venturi variable con vastago de valvula ajustable. |
US12044253B2 (en) | 2017-11-01 | 2024-07-23 | National Oilwell Varco, L.P. | Reciprocating pump systems |
CN107991449A (zh) * | 2017-11-17 | 2018-05-04 | 宁波水表股份有限公司 | 一种供水检测控制系统及方法 |
EP3987182B1 (fr) | 2019-07-29 | 2024-05-22 | Diversey, Inc. | Système de dosage de fluide |
US11596911B2 (en) * | 2020-04-07 | 2023-03-07 | Mpw Industrial Services Group, Inc. | Chemical injection system for connection to a chemical tank and a process line |
CN113458982B (zh) * | 2021-06-23 | 2022-03-29 | 广州大学 | 一种用于强化研磨加工的多相物料混合装置 |
NL2029588B1 (en) * | 2021-11-02 | 2023-06-01 | Magnets For Emulsions N V | Flow control device and mixing assembly comprising said flow control device |
Family Cites Families (18)
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GB976578A (en) * | 1962-02-28 | 1964-11-25 | Hayes Spray Gun Company | Improvements in or relating to mixing apparatus |
US3930756A (en) * | 1974-01-14 | 1976-01-06 | Cat Pumps Corporation | Metering pulse pump |
US4210166A (en) * | 1977-09-14 | 1980-07-01 | Munie Julius C | Mixing apparatus |
FR2612084B1 (fr) * | 1987-03-12 | 1991-03-29 | Djet Sarl | Dispositif d'injection dosee d'un adjuvant dans un debit de liquide |
JP3519136B2 (ja) * | 1994-08-31 | 2004-04-12 | 株式会社司測研 | 可動ベンチュリ管を用いた可変断面積クリティカル・フロー・ベンチュリ管を用いた定流量サンプリング装置 |
JPH08128929A (ja) * | 1994-10-30 | 1996-05-21 | Horiba Ltd | ベンチュリ管およびベンチュリ管のスロート部調節方法 |
US6170978B1 (en) * | 1998-10-21 | 2001-01-09 | Precision Venturi Ltd. | Fluid inductor apparatus having deformable member for controlling fluid flow |
FR2789445B1 (fr) | 1999-02-09 | 2001-03-23 | Dosatron Internat Sa | Machine hydraulique differentielle a mouvement alternatif, en particulier moteur hydraulique differentiel |
US6293294B1 (en) * | 1999-06-24 | 2001-09-25 | Hydrosurge, Inc. | Method and apparatus for fluid mixing and dispensing |
WO2003020391A1 (fr) * | 2001-08-31 | 2003-03-13 | Ashbrook Corporation | Systeme d'alimentation en polymeres |
FR2873172B1 (fr) * | 2004-07-15 | 2007-11-02 | Dosatron Internat Sa | Dispositif de dosage pour introduire un additif dans un courant de liquide |
FR2896281B1 (fr) * | 2006-01-13 | 2008-02-29 | Dosatron International | Machine hydraulique, en particulier moteur hydraulique, a mouvement alternatif. |
FR2896280A1 (fr) * | 2006-01-13 | 2007-07-20 | Dosatron International | Machine hydraulique, en particulier moteur hydraulique, a mouvement alternatif, et piston differentiel pour une telle machine. |
GB0801770D0 (en) * | 2008-01-31 | 2008-03-05 | Burnham Douglas P | Fluid delivery device and method |
FR2967218B1 (fr) * | 2010-11-08 | 2016-09-02 | Dosatron International | Doseur proportionnel d'un liquide auxiliaire dans un liquide principal. |
CN201880505U (zh) * | 2010-11-24 | 2011-06-29 | 上海弗鲁克实业有限公司 | 固/液分散混合系统 |
FR3001003B1 (fr) * | 2013-01-17 | 2015-03-20 | Dosatron International | Dispositif de dosage pour introduire un additif liquide dans un courant de liquide principal. |
FR3016302B1 (fr) * | 2014-01-10 | 2016-02-05 | Dosatron International | Melangeur statique pour homogeneiser un melange d'au moins deux liquides et dispositif de dosage equipe d'un tel melangeur |
-
2013
- 2013-01-17 FR FR1350397A patent/FR3001003B1/fr not_active Expired - Fee Related
- 2013-12-17 EA EA201591336A patent/EA027193B1/ru not_active IP Right Cessation
- 2013-12-17 ES ES13826872.7T patent/ES2609034T3/es active Active
- 2013-12-17 HU HUE13826872A patent/HUE031933T2/en unknown
- 2013-12-17 MX MX2015009227A patent/MX370015B/es active IP Right Grant
- 2013-12-17 CN CN201380073216.4A patent/CN105026754B/zh active Active
- 2013-12-17 EP EP13826872.7A patent/EP2946110B1/fr active Active
- 2013-12-17 KR KR1020157021393A patent/KR102144559B1/ko active IP Right Grant
- 2013-12-17 PL PL13826872T patent/PL2946110T3/pl unknown
- 2013-12-17 PT PT138268727T patent/PT2946110T/pt unknown
- 2013-12-17 NZ NZ710112A patent/NZ710112A/en unknown
- 2013-12-17 AU AU2013373659A patent/AU2013373659B2/en active Active
- 2013-12-17 MY MYPI2015702337A patent/MY182941A/en unknown
- 2013-12-17 US US14/761,555 patent/US10197071B2/en active Active
- 2013-12-17 BR BR112015016794A patent/BR112015016794A2/pt active Search and Examination
- 2013-12-17 CA CA2897457A patent/CA2897457C/fr active Active
- 2013-12-17 DK DK13826872.7T patent/DK2946110T3/en active
- 2013-12-17 WO PCT/IB2013/061042 patent/WO2014111770A1/fr active Application Filing
- 2013-12-17 SG SG11201505583SA patent/SG11201505583SA/en unknown
- 2013-12-17 JP JP2015553183A patent/JP6300825B2/ja active Active
-
2014
- 2014-01-16 AR ARP140100159A patent/AR094500A1/es active IP Right Grant
-
2015
- 2015-07-16 IL IL239979A patent/IL239979B/en active IP Right Grant
-
2016
- 2016-04-15 HK HK16104329.6A patent/HK1216436A1/zh not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO2014111770A1 * |
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