EP0885357B1 - Pompe doseuse - Google Patents

Pompe doseuse Download PDF

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Publication number
EP0885357B1
EP0885357B1 EP97907170A EP97907170A EP0885357B1 EP 0885357 B1 EP0885357 B1 EP 0885357B1 EP 97907170 A EP97907170 A EP 97907170A EP 97907170 A EP97907170 A EP 97907170A EP 0885357 B1 EP0885357 B1 EP 0885357B1
Authority
EP
European Patent Office
Prior art keywords
metering
piston
drive
chamber
compartment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97907170A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0885357A1 (fr
Inventor
Eddy Kelly
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dosatron International SAS
Original Assignee
Dosatron International SAS
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Filing date
Publication date
Application filed by Dosatron International SAS filed Critical Dosatron International SAS
Publication of EP0885357A1 publication Critical patent/EP0885357A1/fr
Application granted granted Critical
Publication of EP0885357B1 publication Critical patent/EP0885357B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/1037—Flap valves
    • F04B53/1047—Flap valves the valve being formed by one or more flexible elements
    • F04B53/106—Flap valves the valve being formed by one or more flexible elements the valve being a membrane
    • F04B53/1067—Flap valves the valve being formed by one or more flexible elements the valve being a membrane fixed at its whole periphery and with an opening at its centre
    • F04B53/107—Flap valves the valve being formed by one or more flexible elements the valve being a membrane fixed at its whole periphery and with an opening at its centre the opening normally being closed by a fixed element
    • 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

Definitions

  • Dosing pumps of this type are known, in particular according to EP-A-0 255 791, or according to FR-B- 2 707 350. These pumps are particularly interesting for injection of an additive, consisting of the liquid auxiliary, in the main liquid which serves at the same engine fluid time. Applications of such pumps numerous. They allow, for example, perform a chlorine (auxiliary liquid) dosage in water (main liquid), or a drug dosage for livestock in the water of a drinker, or prepare water-based drinks (main liquid) and concentrate (fruit juice concentrate or tea) forming the auxiliary liquid.
  • the proportion of auxiliary product to add to the main liquid is weak; he is relatively difficult to accurately maintain this proportion, notably due to leaks, even minute, when using a conventional joint through which slides a rod, for example a connecting rod between the engine piston and the metering piston; such a joint does not prevent the entrainment by capillarity of minute amounts of liquid on either side of the joint.
  • the dosing accuracy is therefore distorted by these leaks, even very small.
  • the object of the invention is, above all, to provide a dosing pump of the kind defined above which does not has the disadvantages mentioned above.
  • a metering pump of the kind defined above in which the metering enclosure has its own outlet, separate from that of the motor enclosure, is characterized by the fact that the metering enclosure is isolated from the driving enclosure by an expandable tubular member, one end of which is tightly fixed to an integral part of the driving enclosure, and the other end of which is fixed tightly to the metering piston.
  • the expandable tubular element is made of a material capable of withstanding variations pressure of the auxiliary liquid and the main liquid in the metering and motor chambers, so that prevent any variation in the volume of the dosing chamber other than that due to the displacement of the metering piston. The dosing accuracy is thus ensured.
  • Such a material is constituted in particular by an appropriate plastic, in particular polypropylene.
  • the expandable tubular element is advantageously formed by a kind of sheath of which the end fixed to the driving enclosure includes a outer peripheral bead tightly tightened between a span of a tubular piece integral with the driving enclosure and a clamping element fixed on this part, in particular by screwing.
  • the other end of the sheath has an inner radial flange crossed by a central hole, this flange being locked against the metering piston by clamping between a end of this metering piston, and a support element secured to a driving piston rod, which rod has a threaded end, which through the sealing washer and is screwed into the dosing piston.
  • the extensibility of the sheath ensuring sealing is advantageously obtained by folds on the part cylindrical of this sheath so as to achieve longitudinal extensibility by opening the folds.
  • the longitudinal section of the sheath has a shape in a zig-zag, and the vertices of the zig-zag are arranged to constitute opening and closing hinges easy, while the faces of the sheath, extending between two vertices of the zigzag are sufficiently rigid so as not to deform under pressure.
  • the peaks of the zig-zag have a lower thickness than the faces.
  • Figure 1 of these drawings is a section axial vertical diagram of a dosing pump according to the invention.
  • Figure 2 finally, is a schematic section partial vertical of an alternative embodiment of the dispenser of figure 1.
  • a dosing pump P or proportional doser, comprising an engine compartment 1 with a piston 2 mobile in alternative translation in an enclosure drive 3.
  • the piston 2 is of the differential type, but it could be of another type.
  • the enclosure 3 has an inlet 4 and a main liquid outlet 5.
  • the enclosure 3 is closed in the upper part by a hat not shown.
  • Distribution means D are provided for control the reciprocating movements of the piston under the action of the main liquid entering through orifice 4.
  • These distribution means D known for example from EP-A-0 255 791 or FR-B-2 707 350, are only very schematically represented and will not be described in detail. We simply recall that these means D can switch from first to second position and Conversely.
  • the means D allow, in the first position, to move the piston 2 in the direction which away from the inlet 4 with admission of main liquid in enclosure 1 and in the second position, move piston 2 in reverse with discharge through the outlet port 5 of a volume determined main fluid.
  • the inversion of the means of distribution D is mechanically controlled at the end of each return stroke of the piston 2.
  • the P dosing pump also has a metering compartment 6 with a movable metering piston 7 in alternative translation in a metering enclosure 8, coaxial with the driving enclosure 1.
  • the metering enclosure 8 is delimited by a wall cylindrical 9 provided at its lower end with a end piece 10 to which a tube 11 is connected for the suction of the auxiliary product. Tube 11 plunges through its lower end, not shown, in a container containing the auxiliary liquid.
  • a valve suction 12 is mounted in the nozzle 10. The valve 12 can be opened when the metering piston 7 moves away from the nozzle 10 and sucks in liquid, while the valve 12 closes when the piston 7 approaches end piece 10.
  • the cylindrical wall 9 is fixed so coaxial, to a tubular piece 13 open to both axial ends, this part 13 being integral with the driving enclosure 3.
  • the part 13 forms a sort of cylindrical sleeve comprising on its outer wall, in the upper part, a shoulder 14 coming into axial abutment against the upper end of a seat 15 provided in the bottom of the enclosure 3. Blocking in axial translation of the part 13 on the seat 15 can be secured by a screw 16, oriented transversely to the axis of the seat 15 and of which the internal end is engaged in a recess provided at the surface of the part 13.
  • the lower end of part 13 is protrudes beyond the base of enclosure 3 and is preferably provided with a thread 17 on its external surface.
  • the wall 9 is provided, in the upper part of its surface external, of a thread 18.
  • the assembly of the wall 9 and of part 13 is produced using a sleeve intermediate 19 threaded; the internal volume of the wall cylindrical 9 communicates with the internal space of the Exhibit 13.
  • the metering piston 7 comprises a head 20, the outside diameter is equal to the diameter of the bore of the wall 9 and a piston body 21 of larger diameter reduced extending from head 20 towards the driving enclosure 3.
  • the head 20 is equipped with a means 22 suction / discharge.
  • This plea 22 consists of an annular seal, for example with a square section, arranged in a peripheral groove of the head 20.
  • the piston 7 has a recess 23 extending parallel to its axial direction, from the groove in which the valve seal 22 is housed, on the side opposite the suction valve 12.
  • This recess 23 has a enough angular extent to give some freedom of movement at the joint part 22 found in the said recess 23.
  • the metering enclosure 8 has its own orifice outlet 24 separate from outlet 5 of the driving enclosure.
  • mixing can take place downstream of pump P by bringing together the pipes connected respectively to ports 5 and 24.
  • the body 21 of the piston 7 is connected by a rod 25 to the differential piston engine 2 which controls the displacements of the metering piston 7.
  • the lower end 26 of rod 25 is threaded and screwed into a hole coaxial threaded from the upper end of the body of piston 21.
  • the metering enclosure 8 is isolated from the enclosure drive 3 by sealing means E with sealing total which include an expandable tubular element T of which one end 27, namely the upper end according to the representation of the drawing, is fixed so tight to part 13 integral with the driving enclosure 3 and the other end 28 of which is tightly fixed metering piston 7.
  • the expandable tubular element T is advantageously constituted by an extensible sheath 29, made of a sufficiently rigid material to withstand external or internal hydraulic pressure.
  • the extensibility of the sheath 29 is obtained by pleating the cylindrical part of this sheath so as to produce a zig-zag profile suitable for unfolding longitudinally, along the direction of the axis of the tube T, thanks to the hinges, or articulations, formed by the vertices 29a of the profile.
  • the material of the sheath is sufficiently rigid so that the faces 29b of the folds, between two vertices 29a, do not deform by significantly under the effect of hydraulic pressure. The dosage is therefore not distorted by variations in volume of the metering enclosure 8 other than that due to displacement of the piston 7.
  • the flexibility of articulation vertices 29a can be obtained by a thickness more weak than that of the faces 29b.
  • the sheath 29 is preferably made in one plastic material, in particular polypropylene.
  • the upper end 27 of the sheath 29 forms a external bead 30 clamped in an annular housing of part 13, against a shoulder of this part, by a cap 31, with central opening for the passage of the rod 25, with interposition of a washer.
  • the hat 31 is externally provided with a cylindrical rim with internal thread suitable for screwing onto a thread outer end of part 13.
  • the lower end 28 of the sheath 29 is constituted by a collar projecting radially inwards provided with a central hole for the passage of the end 26 of rod 25. This flange is tightened so watertight between the transverse end of the body 21 of piston 7 and a disc 32 secured to the rod 25.
  • the assembly is arranged so that the stroke of the head 20 of the piston 7 takes place exclusively inside the bore of the cylindrical wall 9.
  • valve seal 22 When lowering the piston 7, as explained previously, the valve seal 22 performs a travel allowing the passage of auxiliary liquid from the chamber located under the piston head 20 to the chamber located above of this head, while the valve 12 is closed.
  • tubular element T expandable The tightness ensured by the tubular element T expandable is total so that disappear the problems raised initially, such as filing scale on rod 25 when dosing chlorine in a hard water or bacteria development in case the main liquid is water and the auxiliary liquid is a concentrated sweet drink.
  • the cylindrical wall 109 and the tubular part 113 form a single piece which must be engaged from above (as shown in Figure 2) at through the hole delimited by seat 115 against which comes to bear axially a shoulder 114 of the part 113.
  • This part 113 comprises, over an area of its surface outside below seat 115 when the assembly is in place, a thread on which can be screwed a nut 33 which allows the blocking of all parts 109 and 113 on the driving enclosure 103.
  • the metering piston 107 has a head 120 of diameter slightly greater than that of the body 121.
  • the relative difference between the diameter of this head and that of body 121 is weaker than in the example of Figure 1.
  • the metering piston 107 has, at its end away from the engine compartment 101, an extension 34 smaller in diameter than the body 121.
  • This extension 34 coaxial, passes through a flexible sealing member frustoconical 35 for entering a cylindrical chamber 36 with a diameter greater than that of the extension 34.
  • This chamber 36 is located in the end piece 110.
  • the axial length of the extension 34 is greater than the stroke of piston 107 so that the extension 34 always crosses the frustoconical organ 35.
  • This organ sealing 35 made for example of material elastomer, with its small base facing the compartment engine 101, while its large base has a outer radial projecting collar which is tight between a shoulder of the cylindrical wall 109 and a other shoulder of the tip 110.
  • the frustoconical member 35 tends to open and allow auxiliary liquid to be drawn in by the piston metering device 107 and its extension 34.
  • the frustoconical member 35 tends to apply tightly against the extension 34 and prevents any flow of liquid from the enclosure dispenser 108 to chamber 36.
  • extension 34 and the organ sealing 35 constitutes a means 112 of suction equivalent to valve 12 in Figure 1.
  • the solution of the unwinding membrane or bellows made of elastomeric material may be suitable if content with a seal without wishing in addition a high dosing accuracy.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Vending Machines For Individual Products (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Peptides Or Proteins (AREA)
  • Glass Compositions (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Eye Examination Apparatus (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
EP97907170A 1996-03-07 1997-03-04 Pompe doseuse Expired - Lifetime EP0885357B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9602874 1996-03-07
FR9602874A FR2745858B1 (fr) 1996-03-07 1996-03-07 Perfectionnenents apportes aux pompes doseuses
PCT/FR1997/000380 WO1997033090A1 (fr) 1996-03-07 1997-03-04 Pompe doseuse

Publications (2)

Publication Number Publication Date
EP0885357A1 EP0885357A1 (fr) 1998-12-23
EP0885357B1 true EP0885357B1 (fr) 2002-08-07

Family

ID=9489954

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97907170A Expired - Lifetime EP0885357B1 (fr) 1996-03-07 1997-03-04 Pompe doseuse

Country Status (11)

Country Link
US (1) US6129526A (da)
EP (1) EP0885357B1 (da)
AT (1) ATE221960T1 (da)
AU (1) AU1931697A (da)
CA (1) CA2243321C (da)
DE (1) DE69714578T2 (da)
DK (1) DK0885357T3 (da)
ES (1) ES2182033T3 (da)
FR (1) FR2745858B1 (da)
PT (1) PT885357E (da)
WO (1) WO1997033090A1 (da)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2967218A1 (fr) * 2010-11-08 2012-05-11 Dosatron International Doseur proportionnel d'un liquide auxiliaire dans un liquide principal.
CN103140676A (zh) * 2010-10-08 2013-06-05 多沙特隆国际公司 液体计量泵和用于所述泵的检测压力变化的装置
CN104074705A (zh) * 2014-06-26 2014-10-01 成都西屋科技发展有限公司 一种电动计量柱塞泵
WO2015170238A1 (fr) 2014-05-06 2015-11-12 Dosatron International Dispositif de surveillance du fonctionnement d'un doseur d'additif liquide dans un liquide principal, et doseur equipe d'un tel dispositif
CN105275766A (zh) * 2015-11-30 2016-01-27 钱建存 压缩空气动力源配比泵

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6676386B2 (en) * 2001-09-18 2004-01-13 Southern California Hydraulic Engineering, Inc. Oilless air motor assembly for hydraulic pumps
FR2847950B1 (fr) * 2002-11-28 2005-01-07 Dosatron International Machine hydraulique, en particulier moteur, a mouvement alternatif, et doseur comportant un tel moteur
RU2294453C1 (ru) * 2005-08-08 2007-02-27 Общество с ограниченной ответственностью фирма "Саратовгазприборавтоматика" Плунжерное дозирующее устройство
US8632322B2 (en) * 2006-01-30 2014-01-21 Ingersoll-Rand Company Plunger pump with atmospheric bellows
IL196598A0 (en) * 2009-01-19 2009-09-22 Anton Babushkin Dosing pump
USD708293S1 (en) 2013-03-11 2014-07-01 Oms Investments, Inc. Spraying device
US9079142B2 (en) 2013-03-11 2015-07-14 Oms Investments, Inc. Hydraulic mixing device for sprayer system
NL1040412C2 (nl) 2013-09-26 2015-03-30 Gerrit Jan Vink Vloeistofdoseerinrichting aangedreven door de druk van de waterleiding.
FR3039862B1 (fr) * 2015-08-06 2017-08-11 Dosatron International Dispositif de dosage proportionnel supervise et procedes de supervision d'une pompe doseuse
FR3042235B1 (fr) * 2015-10-13 2020-03-27 Dosatron International Machine hydraulique et pompe doseuse reversible equipee d'une telle machine
US10982665B2 (en) 2015-12-18 2021-04-20 Graco Minnesota Inc. Bellows pressure relief valve
TW201727079A (zh) 2015-12-18 2017-08-01 葛萊兒明尼蘇達股份有限公司 波紋管安裝及保留方法
FR3049993B1 (fr) * 2016-04-07 2018-04-20 Dosatron International Mecanisme de dosage d'une pompe, procedes de verrouillage et de deverrouillage d'un tel mecanisme
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
FR3139604B1 (fr) * 2022-09-13 2024-08-02 Idromix Mécanisme de dosage d’une pompe – Système de verrouillage et amélioration de la précision du réglage

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Publication number Priority date Publication date Assignee Title
FR2329980A2 (fr) * 1975-11-03 1977-05-27 Economics Lab Dispositif de dosage de fluide perfectionne
FR2333944A1 (fr) * 1975-12-01 1977-07-01 Ecole Nale Sup Arts Metiers Moteur a vapeur a course alternative utilisant l'energie solaire
JPS57157078A (en) * 1981-03-20 1982-09-28 Nagano Keiki Seisakusho:Kk Plunger pump
US4463663A (en) * 1982-09-29 1984-08-07 Hanson Jr Wallace A Hydraulic cylinder assembly with a liquid recovery system
US4597322A (en) * 1984-01-09 1986-07-01 Moog Inc. Seal assemblies
US4809731A (en) * 1985-01-17 1989-03-07 Frank A. Walton Liquid injection apparatus having an external adjustor
FR2602282B1 (fr) * 1986-07-31 1988-09-23 Cloup Jean Perfectionnement aux dispositifs d'injection d'un produit additif dose dans un fluide principal
US4738600A (en) * 1987-03-05 1988-04-19 Dresser-Rand Company Lubricating system
NO170236C (no) * 1989-04-06 1992-09-23 Speeder As Lineaermotor
AU630757B2 (en) * 1989-11-04 1992-11-05 Yoshikazu Kuze Tubular member for sealing a reciprocating rod
US5055008A (en) * 1990-01-29 1991-10-08 Chemilizer Products, Inc. Proportionating pump for liquid additive metering
US5243897A (en) * 1992-04-07 1993-09-14 Frank & Robyn Walton 1990 Family Trust Magnetically actuated fluid motor
FR2707350B1 (fr) * 1993-07-05 1995-09-01 Ody Civile Ste Rech Dispositif de commande des déplacements alternatifs d'un piston différentiel, et pompe doseuse comportant un tel dispositif.
US5415531A (en) * 1994-04-06 1995-05-16 Binks Manufacturing Company Piston pump for fluent materials
US5513963A (en) * 1994-08-16 1996-05-07 Frank And Robyn Walton 1990 Family Trust Direct action fluid motor and injection pump

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103140676A (zh) * 2010-10-08 2013-06-05 多沙特隆国际公司 液体计量泵和用于所述泵的检测压力变化的装置
CN103140676B (zh) * 2010-10-08 2016-05-25 多沙特隆国际公司 液体计量泵和用于所述泵的检测压力变化的装置
FR2967218A1 (fr) * 2010-11-08 2012-05-11 Dosatron International Doseur proportionnel d'un liquide auxiliaire dans un liquide principal.
WO2012063184A1 (fr) * 2010-11-08 2012-05-18 Dosatron International Doseur proportionnel d'un liquide auxiliaire dans un liquide principal.
WO2015170238A1 (fr) 2014-05-06 2015-11-12 Dosatron International Dispositif de surveillance du fonctionnement d'un doseur d'additif liquide dans un liquide principal, et doseur equipe d'un tel dispositif
US10049553B2 (en) 2014-05-06 2018-08-14 Dosatron International Device for monitoring the operation of a dosage dispenser of a liquid additive in a main liquid, and dosage dispenser provided with such a device
CN104074705A (zh) * 2014-06-26 2014-10-01 成都西屋科技发展有限公司 一种电动计量柱塞泵
CN105275766A (zh) * 2015-11-30 2016-01-27 钱建存 压缩空气动力源配比泵
CN105275766B (zh) * 2015-11-30 2017-09-26 钱建存 压缩空气动力源配比泵

Also Published As

Publication number Publication date
DK0885357T3 (da) 2002-12-02
FR2745858A1 (fr) 1997-09-12
ES2182033T3 (es) 2003-03-01
ATE221960T1 (de) 2002-08-15
PT885357E (pt) 2002-11-29
EP0885357A1 (fr) 1998-12-23
DE69714578D1 (de) 2002-09-12
DE69714578T2 (de) 2003-02-27
CA2243321A1 (fr) 1997-09-12
WO1997033090A1 (fr) 1997-09-12
FR2745858B1 (fr) 2000-12-22
AU1931697A (en) 1997-09-22
CA2243321C (fr) 2003-09-23
US6129526A (en) 2000-10-10

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