EP2638287B1 - Dosing device for proportionally dosing an auxiliary liquid into a main liquid - Google Patents
Dosing device for proportionally dosing an auxiliary liquid into a main liquid Download PDFInfo
- Publication number
- EP2638287B1 EP2638287B1 EP20110799118 EP11799118A EP2638287B1 EP 2638287 B1 EP2638287 B1 EP 2638287B1 EP 20110799118 EP20110799118 EP 20110799118 EP 11799118 A EP11799118 A EP 11799118A EP 2638287 B1 EP2638287 B1 EP 2638287B1
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- EP
- European Patent Office
- Prior art keywords
- chamber
- dosimeter
- liquid
- outlet
- membrane
- Prior art date
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- 239000007788 liquid Substances 0.000 title claims description 58
- 239000012528 membrane Substances 0.000 claims description 31
- 238000002347 injection Methods 0.000 claims description 23
- 239000007924 injection Substances 0.000 claims description 23
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 208000031968 Cadaver Diseases 0.000 description 1
- 208000004434 Calcinosis Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000002308 calcification Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 235000021183 entrée Nutrition 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
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- 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
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/06—Pumps having fluid drive
- F04B43/067—Pumps having fluid drive the fluid being actuated directly by a piston
-
- 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
-
- 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
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
- F04B43/10—Pumps having fluid drive
- F04B43/107—Pumps having fluid drive the fluid being actuated directly by a piston
-
- 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
-
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/85978—With pump
- Y10T137/85986—Pumped fluid control
Definitions
- the invention relates to a proportional proportioner of an auxiliary liquid in a main liquid, a metering device of the type comprising a metering body with a main liquid inlet and an outlet, a hydraulic motor housed in the body, actuated by the main liquid, and connected to a plunger for driving in a reciprocating rectilinear motion, the plunger moving in a first chamber open at a first end remote from the hydraulic motor and opening at a second end in the interior volume of the body of a metering device containing main liquid, the plunger providing suction during a stroke away from the first end of the chamber, the plunger being able to exit the first chamber at the end of the forward stroke, a valve being provided for allow the passage of the liquid to the interior volume of the body beyond a certain pressure in the first chamber, when of the race back.
- a proportional proportioner of this type is known in particular according to the patent EP 0 255 791 B1 .
- Such a proportional metering device operates without electricity, operated only by the main liquid and allows a product injection, constituting the auxiliary liquid, into the main liquid which is generally water under a relatively low inlet pressure.
- the object of the invention is, above all, to provide a proportional doser which avoids the entry of the auxiliary liquid into the body of the doser and ensures the mixing of the two liquids at the downstream outlet of the doser, thanks to simple modifications of a conventional doser , allowing an easy adaptation, with an interest of modularity. It is desirable further that the proportional proportioner, while ensuring mixing at the downstream outlet, allows adjustment of the metered quantity.
- the metering unit is advantageously arranged so that the pressure in the interior volume of the metering body is greater than the sum of the pressure in the injection chamber and the hydraulic head loss in the connection between the second chamber and the chamber. injection.
- the membrane defines, on the opposite side to the second chamber, a space communicating with the first end of the first chamber.
- the second chamber is located in a volume delimited by concavities facing a first cup and a second cup assembled, the periphery of the membrane being tightly sealed between the two assembled cups, the first cup being fixed to the metering body around the first end of the first chamber, while the second cup is provided with the suction port and the discharge port.
- the second chamber is thus formed between the membrane and the concavity of the second cup, the membrane being applied against the concavity of the first cup or that of the second cup.
- the central portion of the membrane is integral with a rigid disk itself secured to an axial rod turned on the opposite side to the second chamber and slidable in a guide bore of the metering body, while leaving a passage for the liquid.
- a rigid disk itself secured to an axial rod turned on the opposite side to the second chamber and slidable in a guide bore of the metering body, while leaving a passage for the liquid.
- the internal volume of the metering body communicates directly with the inlet of the metering device, so that the pressure drop of the motor between the interior volume of the metering body and the outlet contributes to pushing back the membrane.
- the pressure drop of the motor between the internal volume of the metering body and the outlet if it is greater than the hydraulic pressure drop in the connection between the second chamber and the injection chamber, may suffice to push back the membrane, to which case the throttle can be avoided.
- the hydraulic motor 4 is connected to a plunger 5, vertical according to the arrangement of Fig. 1 , to drive it in an alternating rectilinear motion.
- the plunger 5 moves in a first cylindrical chamber 6, delimited by a liner 6a, open at a first end 7 remote from the hydraulic motor 4.
- the chamber 6 opens at a second end 8 into the interior volume 9 of the metering body containing of the main liquid.
- the plunger 5 is equipped, towards its lower end, with a seal 10 forming a valve, surrounding the plunger and housed in a groove 11.
- This groove 11 allows a clearance of the seal 10 during the race. discharge (descent) of the piston 5 to allow the passage of the liquid from the chamber 6 to the space 9 beyond a certain pressure.
- the second chamber 12 is provided with a suction orifice 20, provided in the cup 14, which is lower, according to the representation of Fig. 1 .
- the auxiliary liquid may come from a reservoir (not shown) connected by a pipe to a fitting 21 fitted to the orifice 20.
- a suction valve 22 is further provided at this orifice 20, which allows the suction auxiliary liquid in the chamber 12, and prevents its discharge.
- the flexible pipe 26 is connected, by a connection 27, to a sleeve 28 defining an injection chamber S downstream of the outlet 3.
- the sleeve 28, T has a lateral orifice on which the fitting is mounted. 27, an axial port 29 on the outlet side 3, and another axial port 30 on the opposite side.
- the orifice 29 is provided with a connection 31 at the outlet 3 of the dispenser.
- a throttling member 32 is provided at the outlet of the metering body, upstream of the connection 27 and the injection of auxiliary liquid. This throttling member 32 is provided to create a sufficient pressure drop between the downstream and the interior volume 9 located upstream.
- the pressure difference thus created between the volume 9 and the injection chamber S is set to a value greater than the hydraulic head loss of the discharge line comprising the pipe 26 and the valves 25, 27 (pressure drop in the connection between the second chamber and the injection chamber) to allow to push back the membrane M at the end of aspiration.
- This pressure difference between the volume 9 and the chamber S is advantageously at least 0.2 bar.
- the throttling member 32 is generally constituted by a calibrated check valve which prevents the return of product to the metering body.
- the throttling member 32 may be constituted by a plug with a cylindrical skirt 33 comprising at least one slot 34, in particular longitudinal, giving it a certain elasticity.
- the longitudinal position of the member 32 in the orifice 29 is adjustable to allow adjustment of the pressure drop.
- the member 32 comprises, at each of its ends, shoulders which ensure its maintenance in the orifice 29.
- a spring may be provided to return the member 32 to the desired throttling position.
- the aspiration phase corresponds to the upward stroke according to Fig.1 or forward stroke, the hydraulic motor 4 and the plunger 5 which creates a vacuum in the first chamber 6.
- This depression causes a movement of the membrane M upwards which corresponds to an increase in the volume of the chamber 12.
- the membrane M creates itself a depression in the chamber 12, which causes the lift of the suction valve 22 and an auxiliary liquid inlet in the chamber 12, while that the discharge valve 24 remains closed.
- the suction valve 22, the discharge valve 24, the seal 10 of the plunger and the throttle member 32 are sized and adjusted to ensure proper operation of the dispenser.
- the piston 5 descends into the chamber 6 by creating a slight overpressure in the body of the proportioner B as a result of the pressure drop in the seal 10 forming a valve.
- the descent of the piston 5 is not sufficient for delivery into the injection chamber S.
- the discharge is ensured by the fact that the pressure in the internal volume 9 is greater than the hydraulic head loss in the connection line 25, 26, 27. This gives the complete displacement of the membrane M and the maintenance of the opening of the valve 24.
- the movable seal 10 of the plunger 5 serves as a safety valve to prevent excessive pressure build-up in the chambers 6 and 12.
- the valve 35 is installed in a chamber 36 provided at the end of the plunger 5.1 and opening at its end.
- the chamber 36 communicates through channels 37 with the space beyond the seal 10 .1, on the side of the volume 9 of the metering body.
- the valve 35 can be opened on the descent of the plunger 5.1 when the pressure in the lower part of the chamber 6 becomes greater than a limit determined by the taring of the valve. During the rise of the plunger 5.1, the valve 35 remains closed.
- valve function 35 makes it possible to tare the opening pressure so that the membrane is forced back.
- Fig.4 and 5 The interest of the variant of Fig.4 and 5 is to be able to establish an opening pressure determined by tared valve 35.
- a conventional embodiment by floating seal is accompanied, by cons, a singular hydraulic head loss low if it is low flow.
- the Fig.1-3 correspond to a pump configuration according to which the internal volume 9 of the metering body communicates directly with the outlet 3; the pressure is substantially the same in the interior volume of the body and at the exit; the pressure drop created by the throttling member 32 ensures a sufficient pressure difference between the interior volume 9 of the metering body and the injection chamber S.
- Fig.6 illustrates an alternative pump configuration in which the interior volume 9.2 of the metering body communicates directly with the inlet 2.2 of the metering unit.
- the pressure drop of the motor between the internal volume 9.2 of the metering body and the outlet 3.2 if it is greater than the hydraulic head loss in the connection between the second chamber 12.2 and the injection chamber S.2, may be sufficient to push back the membrane, in which case the throttling member 32 can be avoided.
- the proportional doser according to the invention makes it possible, economically and effectively, to avoid any entry of auxiliary liquid into the metering body, while using a conventional metering body and hydraulic motor, by replacing the standard suction valve. by a simple kit to install.
- the control of the membrane M is carried out with the main liquid, generally motive water, and a plunger 5 dosing.
- the construction of the whole is facilitated.
- the direct control with the plunger 5 makes it possible not to have a pressure equalization system which would be necessary on a hydraulic pump with hydraulic control and intermediate fluid.
- the seal 10 of the plunger 5 plays its role of safety valve.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Measuring Volume Flow (AREA)
- Apparatus Associated With Microorganisms And Enzymes (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Coating Apparatus (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Description
L'invention est relative à un doseur proportionnel d'un liquide auxiliaire dans un liquide principal, doseur du genre de ceux qui comprennent un corps de doseur avec une entrée de liquide principal et une sortie, un moteur hydraulique logé dans le corps, actionné par le liquide principal, et relié à un piston plongeur pour l'entraîner en un mouvement rectiligne alternatif, le piston plongeur se déplaçant dans une première chambre ouverte à une première extrémité éloignée du moteur hydraulique et débouchant à une deuxième extrémité dans le volume intérieur du corps de doseur contenant du liquide principal, le piston plongeur assurant une aspiration lors d'une course aller l'éloignant de la première extrémité de la chambre, le piston plongeur pouvant sortir de la première chambre en fin de course aller, un clapet étant prévu pour permettre le passage du liquide vers le volume intérieur du corps au-delà d'une certaine pression dans la première chambre, lors de la course retour.The invention relates to a proportional proportioner of an auxiliary liquid in a main liquid, a metering device of the type comprising a metering body with a main liquid inlet and an outlet, a hydraulic motor housed in the body, actuated by the main liquid, and connected to a plunger for driving in a reciprocating rectilinear motion, the plunger moving in a first chamber open at a first end remote from the hydraulic motor and opening at a second end in the interior volume of the body of a metering device containing main liquid, the plunger providing suction during a stroke away from the first end of the chamber, the plunger being able to exit the first chamber at the end of the forward stroke, a valve being provided for allow the passage of the liquid to the interior volume of the body beyond a certain pressure in the first chamber, when of the race back.
Un doseur proportionnel de ce type est connu notamment d'après le brevet
Nombre de doseurs proportionnels connus assurent le mélange du liquide principal et du liquide auxiliaire dans le corps du doseur de sorte que l'orifice de sortie du corps de doseur fournit le mélange. Dans certains cas, notamment lorsque le liquide auxiliaire est agressif vis-à-vis des éléments situés à l'intérieur du corps de doseur, ou pour des applications où la réaction entre le produit dosé et le produit moteur amène à des calcifications qui peuvent user prématurément le doseur, il est souhaitable d'éviter toute introduction du liquide auxiliaire à l'intérieur du corps de doseur et d'assurer le mélange en aval du corps de doseur.Many known proportional metering devices mix the main liquid and the auxiliary liquid in the metering body so that the metering body outlet provides the mixture. In some cases, especially when the auxiliary liquid is aggressive vis-à-vis the elements located inside the metering body, or for applications where the reaction between the metered product and the motor product leads to calcifications that can wear prematurely the doser, it is desirable to avoid any introduction of the auxiliary liquid inside the metering body and ensure mixing downstream of the metering body.
Le brevet
L'invention a pour but, surtout, de fournir un doseur proportionnel qui évite l'entrée du liquide auxiliaire dans le corps du doseur et assure le mélange des deux liquides en sortie aval du doseur, grâce à des modifications simples d'un doseur classique, permettant une adaptation aisée, avec un intérêt de modularité. Il est souhaitable en outre que le doseur proportionnel, tout en assurant le mélange en sortie aval, permette un réglage de la quantité dosée.The object of the invention is, above all, to provide a proportional doser which avoids the entry of the auxiliary liquid into the body of the doser and ensures the mixing of the two liquids at the downstream outlet of the doser, thanks to simple modifications of a conventional doser , allowing an easy adaptation, with an interest of modularity. It is desirable further that the proportional proportioner, while ensuring mixing at the downstream outlet, allows adjustment of the metered quantity.
Selon l'invention, un doseur proportionnel du genre défini précédemment est caractérisé en ce qu'il comprend une deuxième chambre de volume variable limitée par une membrane soumise à la pression régnant dans la première chambre, la deuxième chambre comportant un orifice d'aspiration pour le liquide auxiliaire et un orifice de refoulement du liquide auxiliaire, cet orifice de refoulement étant relié par une conduite à une chambre d'injection située en aval de la sortie du corps de doseur pour assurer le mélange du liquide auxiliaire avec le liquide principal qui sort.According to the invention, a proportional doser of the kind defined above is characterized in that it comprises a second chamber of variable volume limited by a membrane subjected to the pressure prevailing in the first chamber, the second chamber comprising a suction port for the auxiliary liquid and a discharge port of the auxiliary liquid, this discharge port being connected by a pipe to an injection chamber located downstream of the outlet of the metering body to ensure mixing of the auxiliary liquid with the main liquid coming out .
Le doseur est avantageusement agencé de telle sorte que la pression dans le volume intérieur du corps de doseur est supérieure à la somme de la pression dans la chambre d'injection et de la perte de charge hydraulique dans le raccordement entre la deuxième chambre et la chambre d'injection.The metering unit is advantageously arranged so that the pressure in the interior volume of the metering body is greater than the sum of the pressure in the injection chamber and the hydraulic head loss in the connection between the second chamber and the chamber. injection.
De préférence, un organe d'étranglement est prévu en aval de la sortie du doseur, et en amont de la chambre d'injection pour créer une perte de charge, en particulier suffisante pour repousser, la membrane en fin d'aspiration, notamment lorsque le piston plongeur sort de la première chambre en fin de course aller.Preferably, a throttling member is provided downstream of the dispenser outlet, and upstream of the injection chamber to create a pressure drop, in particular sufficient to push back, the membrane at the end of suction, especially when the plunger exits the first chamber at the end of the race.
Dans le cas d'une configuration de pompe où le volume intérieur du corps de doseur communique directement avec la sortie, la pression serait sensiblement la même dans le volume intérieur du corps et à la sortie ; la perte de charge créée par l'organe d'étranglement permet d'être assuré d'une différence de pression suffisante entre le volume intérieur du corps de doseur et la chambre d'injection.In the case of a pump configuration where the interior volume of the metering body communicates directly with the outlet, the pressure would be substantially the same in the interior volume of the body and at the outlet; the pressure drop created by the throttle member makes it possible to be assured of a sufficient pressure difference between the internal volume of the metering body and the injection chamber.
Dans le cas d'une configuration de pompe où le volume intérieur du corps de doseur communique directement avec l'entrée du doseur, la perte de charge du moteur entre le volume intérieur du corps de doseur et la sortie, si elle est supérieure à la perte de charge hydraulique dans le raccordement entre la deuxième chambre et la chambre d'injection, peut suffire à repousser la membrane.In the case of a pump configuration where the internal volume of the metering body communicates directly with the metering inlet, the engine pressure drop between the interior volume of the metering body and the outlet, if it is greater than the hydraulic head loss in the connection between the second chamber and the injection chamber, may be enough to push the membrane.
La deuxième chambre est munie d'un clapet d'aspiration et d'un clapet de refoulement ; les réglages de ces clapets ainsi que celui de l'organe d'étranglement sont effectués pour assurer un bon fonctionnement du doseur.The second chamber is provided with a suction valve and a discharge valve; the settings of these valves as well as that of the throttling element are made to ensure proper operation of the dispenser.
Avantageusement, la membrane délimite, du côté opposé à la deuxième chambre, un espace communiquant avec la première extrémité de la première chambre.Advantageously, the membrane defines, on the opposite side to the second chamber, a space communicating with the first end of the first chamber.
De préférence, la deuxième chambre est située dans un volume délimité par des concavités en regard d'une première coupelle et d'une deuxième coupelle assemblées, la périphérie de la membrane étant serrée de manière étanche entre les deux coupelles assemblées, la première coupelle étant fixée au corps de doseur autour de la première extrémité de la première chambre, tandis que la deuxième coupelle est munie de l'orifice d'aspiration et de l'orifice de refoulement. La deuxième chambre est ainsi formée entre la membrane et la concavité de la deuxième coupelle, la membrane pouvant s'appliquer contre la concavité de la première coupelle ou celle de la deuxième coupelle.Preferably, the second chamber is located in a volume delimited by concavities facing a first cup and a second cup assembled, the periphery of the membrane being tightly sealed between the two assembled cups, the first cup being fixed to the metering body around the first end of the first chamber, while the second cup is provided with the suction port and the discharge port. The second chamber is thus formed between the membrane and the concavity of the second cup, the membrane being applied against the concavity of the first cup or that of the second cup.
Avantageusement, la partie centrale de la membrane est solidaire d'un disque rigide lui-même solidaire d'une tige axiale tournée du côté opposé à la deuxième chambre et pouvant coulisser dans un alésage de guidage du corps de doseur, tout en laissant un passage pour le liquide. Un tel guidage n'est qu'optionnel.Advantageously, the central portion of the membrane is integral with a rigid disk itself secured to an axial rod turned on the opposite side to the second chamber and slidable in a guide bore of the metering body, while leaving a passage for the liquid. Such guidance is only optional.
De préférence, la position axiale d'une chemise délimitant la première chambre cylindrique, dans laquelle se déplace le piston plongeur, est réglable à l'aide d'une bague rotative.Preferably, the axial position of a liner delimiting the first cylindrical chamber, in which the plunger moves, is adjustable by means of a rotary ring.
L'organe d'étranglement, situé en aval de la sortie du corps de doseur, peut être constitué par un bouchon muni d'une jupe cylindrique avec au moins une fente, notamment longitudinale, installé sur un orifice d'entrée d'un manchon branché sur la sortie du corps de doseur, et dont la position axiale est réglable.The throttling element, located downstream of the outlet of the metering body, may be constituted by a cap provided with a cylindrical skirt with at least one slot, in particular longitudinal, installed on an inlet port of a sleeve connected to the outlet of the metering body, and whose axial position is adjustable.
Le clapet prévu pour permettre le passage du liquide vers le volume intérieur du corps, au-delà d'une certaine pression dans la première chambre, lors de la course retour, peut être un clapet taré installé dans une chambre prévue en bout du plongeur.The valve provided to allow the passage of the liquid to the interior of the body, beyond a certain pressure in the first chamber during the return stroke, may be a calibrated valve installed in a chamber provided at the end of the plunger.
Selon une variante, le volume intérieur du corps de doseur communique directement avec l'entrée du doseur, de sorte que la perte de charge du moteur entre le volume intérieur du corps de doseur et la sortie contribue à repousser la membrane. La perte de charge du moteur entre le volume intérieur du corps de doseur et la sortie, si elle est supérieure à la perte de charge hydraulique dans le raccordement entre la deuxième chambre et la chambre d'injection, peut suffire à repousser la membrane, auquel cas l'organe d'étranglement peut être évité.According to one variant, the internal volume of the metering body communicates directly with the inlet of the metering device, so that the pressure drop of the motor between the interior volume of the metering body and the outlet contributes to pushing back the membrane. The pressure drop of the motor between the internal volume of the metering body and the outlet, if it is greater than the hydraulic pressure drop in the connection between the second chamber and the injection chamber, may suffice to push back the membrane, to which case the throttle can be avoided.
L'invention consiste, mises à part les dispositions exposées ci-dessus, en un certain nombre d'autres dispositions dont il sera plus explicitement question ci-après à propos d'exemples de réalisation décrits avec référence aux dessins annexés, mais qui ne sont nullement limitatifs. Sur ces dessins :
-
Fig. 1 est une coupe verticale axiale, avec parties en extérieur, d'un doseur proportionnel selon l'invention, en phase montante d'aspiration du liquide auxiliaire. -
Fig. 2 montre, semblablement àFig. 1 , le doseur en phase descendante d'injection du liquide auxiliaire. -
Fig. 3 est une vue extérieure, en perspective, à plus petite échelle du doseur selon l'invention. -
Fig.4 est une coupe verticale axiale, avec parties en extérieur, d'une variante de doseur selon l'invention, en phase descendante. -
Fig.5 est un détail à plus grande échelle de la zone V deFig.4 , et -
Fig.6 est une coupe verticale axiale, avec parties en extérieur, d'une autre variante de doseur selon laquelle l'entrée de l'eau communique directement avec le corps de doseur.
-
Fig. 1 is an axial vertical section, with external parts, of a proportional proportioner according to the invention, in ascending suction phase of the auxiliary liquid. -
Fig. 2 shows, similarly toFig. 1 , the down-doser for injecting the auxiliary liquid. -
Fig. 3 is an external view, in perspective, on a smaller scale of the dispenser according to the invention. -
Fig.4 is an axial vertical section, with external parts, of a metering variant according to the invention, in a downward phase. -
Fig.5 is a larger scale detail of the V zone ofFig.4 , and -
Fig.6 is an axial vertical section, with external parts, of another variant of doser according to which the inlet of the water communicates directly with the metering body.
En se reportant aux dessins, notamment à
Le moteur hydraulique 4 est relié à un piston plongeur 5, vertical selon la disposition de
Le piston plongeur 5 est équipé, vers son extrémité inférieure, d'un joint 10 formant clapet, entourant le piston plongeur et logé dans une gorge 11. Cette gorge 11 permet un débattement du joint 10 lors de la course de refoulement (descente) du piston 5 pour autoriser le passage du liquide de la chambre 6 vers l'espace 9 au-delà d'une certaine pression.The
Le piston plongeur 5, lorsqu'il effectue une course aller qui l'éloigne de la première extrémité 7 de la chambre, crée une aspiration et, lorsqu'il effectue une course retour vers ladite première extrémité 7, le piston 5 provoque une augmentation de pression dans la chambre 6.The
Selon l'invention, le doseur D comprend une deuxième chambre 12, de volume variable, limitée par une membrane M soumise à la pression de liquide régnant dans la première chambre 6. La membrane M est souple, déformable. La deuxième chambre 12 est avantageusement située dans un volume délimité par les concavités en regard de deux coupelles creuses 13, 14 assemblées de manière démontable. La coupelle 13, supérieure dans la représentation de
La deuxième chambre 12 est munie d'un orifice 20 d'aspiration, prévu dans la coupelle 14, inférieure selon la représentation de
La coupelle 14 comporte en outre un orifice de refoulement 23, communiquant avec la chambre 12, équipé d'un clapet de refoulement 24 et d'un raccord 25 sur lequel est branchée une conduite flexible 26. Le raccord de refoulement 24 s'ouvre lors de la montée en pression dans la chambre 12 pour permettre le passage du liquide vers la conduite 26. Ce clapet de refoulement 24 se ferme lors de l'aspiration du liquide auxiliaire.The
La conduite flexible 26 est reliée, par un raccord 27, à un manchon 28 délimitant une chambre d'injection S en aval de la sortie 3. Le manchon 28, en T, comporte un orifice latéral sur lequel est monté le raccord 27, un orifice axial 29 du côté de la sortie 3, et un autre orifice axial 30 côté opposé. L'orifice 29 est muni d'un raccord 31 à la sortie 3 du doseur.The
Le manchon 28 ainsi que le raccord 27 et l'arrivée de liquide auxiliaire sont situés en aval de la sortie 3 du doseur, et le liquide auxiliaire ne pénètre pas dans le volume intérieur 9 du doseur. Le mélange du liquide auxiliaire avec le liquide principal s'effectue en aval de la sortie 3, et est évacué par l'orifice 30, comme indiqué par la flèche F.The
La membrane M délimite, du côté opposé à la deuxième chambre 12, un espace E (voir
Un organe d'étranglement 32 est prévu en sortie du corps de doseur, en amont du raccord 27 et de l'injection de liquide auxiliaire. Cet organe d'étranglement 32 est prévu pour créer une perte de charge suffisante entre l'aval et le volume intérieur 9 situé en amont. La différence de pression ainsi créée entre le volume 9 et la chambre d'injection S est réglée à une valeur supérieure à la perte de charge hydraulique de la ligne de refoulement comprenant la conduite 26 et les clapets 25, 27(perte de charge dans le raccordement entre la deuxième chambre et la chambre d'injection) pour permettre de repousser la membrane M en fin d'aspiration. Cette différence de pression entre le volume 9 et la chambre S est avantageusement d'au moins 0.2 bar. L'organe d'étranglement 32 est généralement constitué par un clapet anti-retour taré qui évite le retour de produit vers le corps de doseur.A throttling
L'organe d'étranglement 32 peut être constitué par un bouchon avec jupe cylindrique 33 comportant au moins une fente 34, notamment longitudinale, lui conférant une certaine élasticité. La position longitudinale de l'organe 32 dans l'orifice 29 est réglable pour permettre d'ajuster la perte de charge. L'organe 32 comporte, à chacune de ses extrémités, des épaulements qui assurent son maintien dans l'orifice 29. Un ressort peut être prévu pour rappeler l'organe 32 vers la position d'étranglement souhaitée.The throttling
Le fonctionnement du doseur est le suivant.The operation of the doser is as follows.
La phase d'aspiration correspond à la course ascendante selon
Lorsque le piston plongeur 5 sort de la chambre 6 en fin de course aller, la différence de pression existant entre le volume intérieur 9 du corps de doseur et la chambre d'injection S permet de repousser la membrane M et d'assurer un début de refoulement par ouverture du clapet 24 et injection dans le tuyau 26 et la chambre S.When the
De préférence, la position longitudinale de la chambre 6 est réglable, notamment à l'aide d'une bague B qui, par rotation, permet de régler la position axiale de la chemise 6a dont la paroi peut coulisser à l'intérieur du corps. Des moyens tels que ceux montrés par
Le clapet d'aspiration 22, le clapet de refoulement 24, le joint 10 du piston plongeur et l'organe d'étranglement 32 sont dimensionnés et réglés pour assurer le bon fonctionnement du doseur.The
Dans la phase de refoulement, correspondant à
La membrane M est poussée vers le bas, le clapet d'aspiration 22 est fermé, tandis que le clapet de refoulement 24 s'est ouvert pour l'injection du liquide auxiliaire dans la chambre S. La membrane M vient s'appliquer contre la paroi de la concavité de la coupelle 14.The membrane M is pushed down, the
Le joint 10 mobile du plongeur 5 fait office de clapet de sécurité pour éviter une montée en pression trop importante dans les chambres 6 et 12.The
Les
Le clapet 35, avantageusement du type à bille et ressort, est installé dans une chambre 36 prévue en bout du plongeur 5.1 et débouchant à son extrémité. La chambre 36 communique par des canaux 37 avec l'espace situé au-delà du joint 10 .1, du côté du volume 9 du corps de doseur. Le clapet 35 peut s'ouvrir à la descente du plongeur 5.1 lorsque la pression dans la partie inférieure de la chambre 6 devient supérieure à une limite déterminée par le tarage du clapet. Lors de la montée du plongeur 5.1, le clapet 35 reste fermé.The
Le fonctionnement de la variante des
L'intérêt de la variante des
Les
Le doseur proportionnel selon l'invention permet, de manière économique et efficace, d'éviter toute entrée de liquide auxiliaire dans le corps du doseur, tout en utilisant un corps de doseur et un moteur hydraulique classiques, en remplaçant le clapet d'aspiration standard par un kit simple à installer.The proportional doser according to the invention makes it possible, economically and effectively, to avoid any entry of auxiliary liquid into the metering body, while using a conventional metering body and hydraulic motor, by replacing the standard suction valve. by a simple kit to install.
La commande de la membrane M est réalisée avec le liquide principal, généralement de l'eau motrice, et un piston plongeur 5 de dosage. La construction de l'ensemble s'en trouve facilitée. La commande directe avec le piston plongeur 5 permet de ne pas avoir de système d'équilibrage de pression qui serait nécessaire sur une pompe électrique à commande hydraulique et fluide intercalaire. En cas de bouchage de la canalisation 26 en aval du clapet de refoulement 24, le joint 10 du piston plongeur 5 joue son rôle de clapet de sécurité.The control of the membrane M is carried out with the main liquid, generally motive water, and a
Claims (11)
- A proportional dosimeter for metering an auxiliary liquid into a main liquid, comprising a dosimeter body with a main liquid inlet (2, 2.2) and an outlet (3, 3.2), a hydraulic motor (4) housed in the body, actuated by the main liquid, and connected to a plunger piston (5, 5.1) to drive same in a reciprocating rectilinear movement, the plunger piston moving in a first chamber (6) that is open at a first end (7) away from the hydraulic motor and opens at a second end (8) into the interior volume (9, 9.2) of the dosimeter body containing main liquid, the plunger piston performing an intake phase during an outward stroke in which it moves away from the first end (7) of the chamber, it being possible for the plunger piston to leave the first chamber at the end of the outward stroke, a valve being provided to allow the liquid to pass to the interior volume of the body, during the return stroke, once a certain pressure in the first chamber is exceeded,
characterized in that it comprises a variable-volume second chamber (12) bounded by a membrane (M) subjected to the pressure obtaining in the first chamber (6), the second chamber (12) comprising an intake orifice (20) for the auxiliary liquid and a delivery orifice (23) for the auxiliary liquid, this delivery orifice being connected by a duct (26) to an injection chamber (S) situated downstream of the outlet of the dosimeter body so that the auxiliary liquid can mix with the emerging main liquid. - The dosimeter as claimed in claim 1, characterized in that it is arranged in such a way that the pressure in the interior volume (9, 9.2) of the dosimeter body is greater than the sum of the pressure in the injection chamber (S) and of the loss of hydraulic head in the connection between the second chamber (12) and the injection chamber (S).
- The dosimeter as claimed in claim 1 or 2, characterized in that a restriction member (32) is provided downstream of the outlet (3) of the dosimeter and upstream of the injection chamber (S) in order to create a head loss.
- The dosimeter as claimed in any one of the preceding claims, characterized in that the second chamber (12) is equipped with an intake valve (20) and with a delivery valve (23).
- The dosimeter as claimed in any of the preceding claims, characterized in that the membrane (M), on the opposite side to the second chamber (12), bounds a space (E) communicating with the first end (7) of the first chamber (6).
- The dosimeter as claimed in any one of the preceding claims, characterized in that the second chamber (12) is situated in a volume bounded by opposing concavities of a first cup (13) and of a second cup (14) which are assembled, the periphery of the membrane (M) being clamped in a fluidtight manner between the two assembled cups, the first cup (13) being fixed to the dosimeter body (1) around the first end (7) of the first chamber, while the second cup is equipped with the intake orifice (20) and with the delivery orifice (23).
- The dosimeter as claimed in claim 6, characterized in that the central part of the membrane (M) is secured to a rigid disk (16) itself secured to an axial rod (17) facing away from the second chamber (12) and able to slide in a guide bore (18) of the dosimeter body, while leaving a passage for the liquid.
- The dosimeter as claimed in any one of the preceding claims, characterized in that the axial position of a sleeve (6a) delimiting the cylindrical first chamber (6) in which the plunger piston moves can be adjusted using a rotary ring.
- The dosimeter as claimed in any one of the preceding claims, characterized in that the restriction member (32) situated downstream of the outlet (3) of the dosimeter body consists of a plug fitted with a cylindrical skirt (33) with at least one slot (34), installed on an inlet orifice of a union (28) connected to the outlet of the dosimeter body.
- The dosimeter as claimed in any one of the preceding claims, characterized in that the valve provided to allow the liquid to pass to the interior volume (9) of the body, during the return stroke, once the pressure in the first chamber (6) has exceeded a certain pressure, is a preloaded valve (35) installed in a chamber (36) provided at the end of the plunger (5.1).
- The dosimeter as claimed in one of claims 1 to 3, characterized in that the interior volume (9.2) of the dosimeter body communicates directly with the inlet (2.2) of the dosimeter so that the head loss of the motor between the interior volume (9.2) of the dosimeter body and the outlet (3.2) contributes to pushing the membrane back.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL11799118T PL2638287T3 (en) | 2010-11-08 | 2011-11-07 | Dosing device for proportionally dosing an auxiliary liquid into a main liquid |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1059182A FR2967218B1 (en) | 2010-11-08 | 2010-11-08 | PROPORTIONAL DOSER OF AN AUXILIARY LIQUID IN A MAIN FLUID. |
PCT/IB2011/054948 WO2012063184A1 (en) | 2010-11-08 | 2011-11-07 | Proportional dosimeter for metering an auxiliary liquid into a main liquid |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2638287A1 EP2638287A1 (en) | 2013-09-18 |
EP2638287B1 true EP2638287B1 (en) | 2014-06-04 |
EP2638287B8 EP2638287B8 (en) | 2014-11-19 |
Family
ID=44486826
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20110799118 Active EP2638287B8 (en) | 2010-11-08 | 2011-11-07 | Dosing device for proportionally dosing an auxiliary liquid into a main liquid |
Country Status (19)
Country | Link |
---|---|
US (1) | US9303634B2 (en) |
EP (1) | EP2638287B8 (en) |
JP (1) | JP6002139B2 (en) |
CN (1) | CN103237985B (en) |
AP (1) | AP2013007093A0 (en) |
AU (1) | AU2011327826B2 (en) |
BR (1) | BR112013011178B1 (en) |
CA (1) | CA2815098C (en) |
DK (1) | DK2638287T3 (en) |
EA (1) | EA022907B1 (en) |
ES (1) | ES2488168T3 (en) |
FR (1) | FR2967218B1 (en) |
MX (1) | MX2013005119A (en) |
NZ (1) | NZ609542A (en) |
PL (1) | PL2638287T3 (en) |
PT (1) | PT2638287E (en) |
UA (1) | UA107739C2 (en) |
WO (1) | WO2012063184A1 (en) |
ZA (1) | ZA201305956B (en) |
Families Citing this family (17)
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FR3001003B1 (en) * | 2013-01-17 | 2015-03-20 | Dosatron International | ASSAY DEVICE FOR INTRODUCING A LIQUID ADDITIVE IN A MAIN LIQUID CURRENT. |
FR3012538B1 (en) | 2013-10-30 | 2018-05-18 | Dosatron International | MEMBRANE PUMP AND VALVE DEVICE FOR SUCH A PUMP |
FR3016302B1 (en) | 2014-01-10 | 2016-02-05 | Dosatron International | STATIC MIXER FOR HOMOGENIZING A MIXTURE OF AT LEAST TWO LIQUIDS AND DOSING DEVICE EQUIPPED WITH SUCH A MIXER |
FR3020839B1 (en) * | 2014-05-06 | 2016-05-13 | Dosatron International | DEVICE FOR MONITORING THE OPERATION OF A LIQUID ADDITIVE DOSER IN A MAIN FLUID, AND DOSER EQUIPPED WITH SUCH A DEVICE. |
WO2016109658A1 (en) | 2014-12-30 | 2016-07-07 | Graco Minnesota Inc. | Pump rod and driving link with side-load reducing configuration |
AU366231S (en) * | 2015-06-18 | 2015-12-23 | Dosatron International | Metering pump |
FR3039862B1 (en) * | 2015-08-06 | 2017-08-11 | Dosatron International | SUPERVISORY PROPORTIONAL DOSING DEVICE AND METHODS OF SUPERVISION OF A DOSING PUMP |
USD803892S1 (en) * | 2016-01-11 | 2017-11-28 | Timmer Gmbh | Pump |
FR3049993B1 (en) * | 2016-04-07 | 2018-04-20 | Dosatron International | MECHANISM FOR DOSING A PUMP, METHODS OF LOCKING AND UNLOCKING SUCH A MECHANISM |
FR3049992B1 (en) * | 2016-04-07 | 2018-04-20 | Dosatron International | PROPORTIONAL DOSING PUMP, METHOD FOR MOUNTING AND DISASSEMBLING SUCH A PUMP |
BR102018003284B1 (en) | 2017-02-21 | 2021-07-20 | Graco Minnesota Inc. | PISTON ROD FOR A PUMP, PUMP, SPRAYER, AND METHOD FOR REPLACING A WEAR GLOVE |
IT201900004619A1 (en) * | 2019-03-27 | 2020-09-27 | Luca Greco | EQUIPMENT FOR PREPARING AND DISPENSING A LUBRICANT AND REFIGERANT LIQUID PRODUCT FOR MACHINE TOOLS |
USD933714S1 (en) * | 2019-05-30 | 2021-10-19 | Mixtron S.R.L. | Metering pump |
US11644020B2 (en) | 2019-07-29 | 2023-05-09 | Diversey, Inc. | Fluid dosing system |
KR20220156638A (en) | 2020-03-31 | 2022-11-25 | 그라코 미네소타 인크. | pump drive system |
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 |
USD1006833S1 (en) * | 2021-07-08 | 2023-12-05 | Mixtron S.R.L. | Pump for liquids |
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-
2010
- 2010-11-08 FR FR1059182A patent/FR2967218B1/en not_active Expired - Fee Related
-
2011
- 2011-07-11 UA UAA201307184A patent/UA107739C2/en unknown
- 2011-11-07 EA EA201390668A patent/EA022907B1/en not_active IP Right Cessation
- 2011-11-07 WO PCT/IB2011/054948 patent/WO2012063184A1/en active Application Filing
- 2011-11-07 US US13/883,602 patent/US9303634B2/en active Active
- 2011-11-07 BR BR112013011178-0A patent/BR112013011178B1/en not_active IP Right Cessation
- 2011-11-07 AP AP2013007093A patent/AP2013007093A0/en unknown
- 2011-11-07 EP EP20110799118 patent/EP2638287B8/en active Active
- 2011-11-07 MX MX2013005119A patent/MX2013005119A/en active IP Right Grant
- 2011-11-07 JP JP2013537254A patent/JP6002139B2/en active Active
- 2011-11-07 PL PL11799118T patent/PL2638287T3/en unknown
- 2011-11-07 CN CN201180053806.1A patent/CN103237985B/en active Active
- 2011-11-07 AU AU2011327826A patent/AU2011327826B2/en active Active
- 2011-11-07 PT PT11799118T patent/PT2638287E/en unknown
- 2011-11-07 CA CA2815098A patent/CA2815098C/en active Active
- 2011-11-07 ES ES11799118.2T patent/ES2488168T3/en active Active
- 2011-11-07 DK DK11799118T patent/DK2638287T3/en active
- 2011-11-07 NZ NZ60954211A patent/NZ609542A/en unknown
-
2013
- 2013-08-07 ZA ZA2013/05956A patent/ZA201305956B/en unknown
Also Published As
Publication number | Publication date |
---|---|
JP6002139B2 (en) | 2016-10-05 |
CN103237985B (en) | 2016-06-22 |
PL2638287T3 (en) | 2014-11-28 |
FR2967218B1 (en) | 2016-09-02 |
BR112013011178A2 (en) | 2016-08-02 |
PT2638287E (en) | 2014-08-28 |
AP2013007093A0 (en) | 2013-09-30 |
AU2011327826A1 (en) | 2013-06-20 |
BR112013011178B1 (en) | 2020-12-22 |
EA201390668A1 (en) | 2013-09-30 |
US20130233421A1 (en) | 2013-09-12 |
UA107739C2 (en) | 2015-02-10 |
WO2012063184A1 (en) | 2012-05-18 |
MX2013005119A (en) | 2013-06-13 |
AU2011327826B2 (en) | 2015-09-24 |
FR2967218A1 (en) | 2012-05-11 |
NZ609542A (en) | 2014-09-26 |
CA2815098C (en) | 2016-06-28 |
US9303634B2 (en) | 2016-04-05 |
CN103237985A (en) | 2013-08-07 |
EA022907B1 (en) | 2016-03-31 |
DK2638287T3 (en) | 2014-09-15 |
EP2638287A1 (en) | 2013-09-18 |
ES2488168T3 (en) | 2014-08-26 |
ZA201305956B (en) | 2014-04-30 |
CA2815098A1 (en) | 2012-05-18 |
EP2638287B8 (en) | 2014-11-19 |
JP2014500951A (en) | 2014-01-16 |
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