EP3440353B1 - Pompe a dosage proportionnel, procede de montage et de demontage d'une telle pompe - Google Patents

Pompe a dosage proportionnel, procede de montage et de demontage d'une telle pompe Download PDF

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Publication number
EP3440353B1
EP3440353B1 EP17715176.8A EP17715176A EP3440353B1 EP 3440353 B1 EP3440353 B1 EP 3440353B1 EP 17715176 A EP17715176 A EP 17715176A EP 3440353 B1 EP3440353 B1 EP 3440353B1
Authority
EP
European Patent Office
Prior art keywords
fixing ring
metering pump
hydraulic machine
pump
proportional metering
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.)
Active
Application number
EP17715176.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3440353A1 (fr
Inventor
Najib Laatiaoui
Christophe Charriere
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
Priority to PL17715176T priority Critical patent/PL3440353T3/pl
Publication of EP3440353A1 publication Critical patent/EP3440353A1/fr
Application granted granted Critical
Publication of EP3440353B1 publication Critical patent/EP3440353B1/fr
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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
    • F04B53/22—Arrangements for enabling ready assembly or disassembly
    • 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
    • F04B9/107—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 rectilinear movement of the pumping member in the working direction being obtained by a single-acting liquid motor, e.g. actuated in the other direction by gravity or a spring
    • 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

  • the invention relates to a proportional metering pump of the type comprising a hydraulic machine supplied with a main liquid and with a secondary liquid, and a mechanism for metering the secondary liquid.
  • the invention also relates to a method of mounting and dismounting the metering mechanism with the hydraulic machine.
  • this interior cavity is a chamber for mixing the main liquid with the secondary liquid upstream from the outlet of the hydraulic machine.
  • This interior cavity is also crossed by a plunger actuated by a member of the hydraulic machine capable of performing an alternating movement, said movement being communicated to the plunger and causing the aspiration of the secondary liquid through the metering mechanism, into the interior cavity. , if the latter acts as a mixing chamber.
  • this type of assembly can however be subject to handling errors or unintentional unscrewing.
  • This type of fault then has a drawback for the user, which results in a loss of the main liquid (generally water).
  • This type of fault also presents a significant risk of leakage of the secondary liquid when the unscrewing is partial, which can lead to pollution of the site hosting the pump (the secondary liquid is generally a chemical such as fertilizer for planting or well an animal medicine).
  • a proportional diaphragm metering device comprising means for fixing the nozzle to the tubing for access to the interior cavity of the metering device, said means comprising a fixing ring provided with a first and a second end, and mounted in rotation around one end of the nozzle.
  • this assembly does not have a locking ring, and therefore remains exposed to the risks of unscrewing.
  • the document FR 2 681 646 A1 concerns an adjustable displacement pump by means of a sleeve whose stroke can be blocked with a tightening nut.
  • This device does not however have two rings cooperating at the end of screwing so that one of them blocks the unscrewing of the other.
  • the object of the invention is to overcome all or part of the drawbacks set out above by proposing a proportional metering pump comprising a metering mechanism as well as a hydraulic machine, and an assembly and disassembly method, preventing involuntary separation between the nozzle of the dosing mechanism and the hydraulic machine.
  • the screwing is preferably less than half a turn.
  • the fixing ring may include at its second end and at its inner circumferential surface a male multi-start thread consisting of two to eight threads extending along the same helix, the tubing for access to the cavity inside the hydraulic machine with additional female thread.
  • the latter can be made up of four threads extending over a length corresponding to a screwing along an eighth of a turn.
  • the tubing for access to the cavity inside the hydraulic machine may comprise a multi-start male thread consisting of two to eight threads extending along the same helix, the fixing ring being provided at its second end and at its level. inner circumferential surface of a complementary female thread.
  • the male multi-start threading of the tubing can then consist of four threads extending over a length corresponding to a screwing in an eighth of a turn.
  • the tubing for access to the cavity inside the hydraulic machine and the fixing ring can cooperate in screwing according to a configuration of the bayonet type, one of the tubing for access to the interior cavity and fixing ring being provided with at least one lug capable of blocking in a groove formed on the other of the tubing for access to the interior cavity and fixing ring.
  • the second end of the locking ring has tongues capable of occupying the space between portions of increasing height formed on the second end of the fixing ring, said threads being carried by said portions.
  • the components of the pump are manufactured by injection of thermoplastic plastic materials chosen from the list defined by polyamides, polyvinylidene fluorides, high density polyethylenes, polypropylenes loaded or not, polyformaldehydes.
  • Sealing means can be interposed between the nozzle and the tubing for access to the mixing chamber.
  • the invention also relates to a first method of mounting a proportional metering pump according to any one of the embodiments of the invention, characterized in that one proceeds to the screwing of the fixing ring with the tubing for access to the cavity inside the hydraulic machine, until the second end of the locking ring is made to rotate with the second end of the fixing ring by complementary shape, so as to lock the unscrewing of the fixing ring.
  • the screwing is less than half a turn.
  • the invention also relates to a first method of disassembling a proportional metering pump according to any one of the embodiments of the invention, characterized in that the locking ring is translated so as to distance the first end of said ring of the shoulder against which it was resting, then unscrewing the fixing ring of the tube for access to the interior cavity to the hydraulic machine.
  • the unscrewing is less than half a turn.
  • variants of the invention comprising only a selection of described characteristics, isolated from the other described characteristics (even if this selection is isolated within a sentence including these other features), if this selection of features is sufficient to confer a technical advantage or to differentiate the invention from the state of the prior art.
  • This selection includes at least one characteristic, preferably functional, without structural details, or with only part of the structural details if this part only is sufficient to confer a technical advantage or to differentiate the invention from the state of the prior art. .
  • the figures 1 and 2 each represents an embodiment of a proportional metering pump. It comprises a hydraulic machine 4 extending along a longitudinal axis 9, and provided with an inlet 40, an outlet 41, a tubing for access to an interior cavity 43, as well as a suction nozzle 75
  • This suction nozzle is provided with a suction valve 80 communicating at one of its ends with a cavity inside the pump (not shown in the figure) and at the other of its ends with a container of product to be vacuumed (not shown in the figure).
  • the hydraulic machine is provided with an organ capable of performing an alternating movement, the supply of liquid to the pump at the input triggering the reciprocating movement of the organ, which movement alternately causing suction through the nozzle into the cavity. interior with opening of the suction valve 80 when the member moves away from the nozzle 75 then an expulsion at outlet 41 of the pump with closing of the first suction valve when the member approaches the nozzle.
  • the hydraulic machine can be of the type described in the document EP1971776 A1 and on the figure 1 .
  • This hydraulic machine comprises an envelope comprising a body and a cover, a separation means capable of reciprocating in the envelope between the body and the cover, this separation means defining two chambers.
  • the hydraulic machine also includes hydraulic switching means for supplying liquid and evacuating the aforementioned chambers. These switching means comprise a distribution member which can take two stable positions and which is controlled by the movements of the separation means.
  • the body of the envelope also contains a compartment connected to a pressurized liquid inlet and in which the switching means are housed, as well as triggering means comprising a pusher linked to the separation means, capable of causing, at the end stroke, a sudden change in the position of the switching means, under the action of an elastic means, for reversing the stroke.
  • the dispensing member comprises a dispensing drawer applied against a fixed flat plate relative to the body of the envelope, the dispensing drawer being able to slide in leaktight fashion, without a seal, against the plate which has orifices connected respectively to the chambers envelope and a liquid outlet port.
  • the drawer is then provided to, depending on its position, close some of the openings or put them in communication with the arrival of fluid or with the exhaust.
  • the hydraulic machine can also be of the type described in the document EP1971774 A1 and on the figure 2 .
  • the hydraulic machine comprises a casing, a piston capable of sliding in reciprocating motion in the casing, the piston separating the casing into two chambers, hydraulic switching means for the supply of liquid and the evacuation of chambers separated by the piston.
  • These switching means are controlled by the movements of the piston and comprise at least one link acting on a dispensing member which can take two stable positions.
  • Triggering means are further provided comprising a pusher capable of causing, at the end of the piston stroke, an abrupt change in the position of the switching means, under the action of an elastic means, for reversing the race.
  • the elastic means is secured, at each of its ends, to an articulation member received respectively in a housing provided on the link and on another movable part of the hydraulic machine, each housing being open in a direction substantially opposite to the direction of the force exerted by the elastic means in the housing, so that each articulation member can be extracted from its housing open against said force.
  • the proportional metering pump also includes a metering mechanism 7 for adjusting the volume drawn into the nozzle 75.
  • This mechanism is described in figures 1 and 2 and involves an adjustment nut 70 which drives the body of the metering device 73 in its jacket 70.
  • the plunger 71 and the metering joint 72 leave the body of the metering unit 73, the metering stroke is therefore more or less long. Therefore, the volume sucked is more or less important. The volume of water for a cycle being almost constant, the dosage is therefore more or less strong.
  • the pump further comprises means for fixing the nozzle 75 to the access pipe 43 to the interior cavity of the hydraulic machine.
  • These means comprise a fixing ring 2 of substantially annular shape, extending between a first 20 and a second 21 end.
  • This fixing ring is mounted to rotate freely around the end of the nozzle 75 intended to be secured to the pipe 43 of the hydraulic machine 4.
  • This ring can for example be mounted on the nozzle 75, with an internal diameter reduced at its end 20 so that said end abuts against a shoulder formed on the end of the nozzle 75. In this way, the nozzle cannot be disengaged from the fixing ring 2 when the nozzle is fixed to the tubing for access to the interior cavity.
  • These means also comprise a locking ring 1 also of substantially annular shape, extending between a first 10 and a second 11 end.
  • This fixing ring is mounted fixed in rotation relative to the hydraulic machine and free in translation along the tubing for access to the mixing chamber.
  • This mounting can be achieved by means of ribs and complementary grooves formed respectively on the surface of the tubing and on the circumferential surface inside the locking ring. According to one embodiment, it is therefore possible to provide at least one groove 45 on the outer circumferential surface of the tube 43, capable of accommodating a slider provided on the inner circumferential surface of the locking ring 1.
  • Spring-forming means 3 maintain, by their return force, the first end 10 of said ring pressed against a shoulder 430 formed on said tube and in the direction of the metering mechanism 7 and of the nozzle 75.
  • “Spring” is understood to mean any mechanical device designed to store energy when it is deformed and to restore the same amount when it is released.
  • the means 3 can be, for example, a spring of the metal coil or thermoplastic leaf type.
  • the fixing ring and the tubing for access to the cavity inside the hydraulic machine are able to cooperate according to a screwing.
  • screwing is meant a displacement in an Euclidean affine space which is the commutative compound of a rotation and a translation along a vector directing the axis of rotation (in this case axis 9).
  • the screwing is less than half a turn, so that the connection between the fixing ring and the hydraulic machine is carried out quickly.
  • the second end 11 of the locking ring is secured to the second end 21 of the fixing ring by form complementarity.
  • the surfaces of the ends 11 and 21 of the rings are nested so as to prevent rotation of one relative to the other. In this way, the unscrewing of the fixing ring is locked.
  • the fixing ring comprises at its second end 21 and at its inner circumferential surface a male multi-start thread consisting of two to eight threads extending along the same helix.
  • the tubing for access to the cavity inside the hydraulic machine consequently comprises a complementary female thread 44 machined on its outer circumferential surface.
  • the male multi-start thread consists of four threads extending over a length corresponding to a screwing in an eighth of a turn.
  • the thread can be machined just as it can be injection molded.
  • the tube 43 for access to the interior cavity of the hydraulic machine comprises on its external circumferential surface a multi-start male thread consisting of two to eight threads extending along the same helix.
  • the fixing ring is then provided, in turn, at its second end 21 and at its inner circumferential surface with a complementary female thread.
  • the male multi-start thread consists of four threads extending over a length corresponding to a screwing in an eighth of a turn.
  • the tubing for access to the interior cavity of the hydraulic machine and the fixing ring cooperate in screwing according to a configuration of the bayonet type.
  • the tubing for access to the inner cavity is provided on its outer circumferential surface with at least one lug capable of locking in a groove formed on the inner circumferential surface of the fixing ring.
  • the fixing ring which is provided on its inner circumferential surface with at least one lug capable of locking in a groove formed on the outer circumferential surface of the tubing for access to the mixing chamber .
  • the second end 11 of the locking ring has tongues 12 capable of occupying the space between portions 23 formed on the second end 21 of the fixing ring, carrying the threads 22.
  • the portions 23 are of increasing height, so that the tongues 12 follow the increasing top of these portions like a ramp during the screwing operation and push back the locking ring, until said tongues fall into the space between the portions 23 under the action of the return force of the spring, once the end of the screwing has been reached.
  • the constituent elements are preferably manufactured by injection of thermoplastic plastic materials chosen from the list defined by polyamides, polyvinylidene fluorides, high density polyethylenes, loaded or unfilled polypro-pylenes, polyformaldehydes.
  • sealing means 6 are interposed between the outer circumferential surface of the nozzle 75 and the circumferential surface inside the tube 43 for access to the mixing chamber.
  • the screwing of the fixing ring 2 is first of all started with the tubing for access to the cavity inside the hydraulic machine.
  • the second end 11 of the locking ring is made to rotate with the second end 21 of the fixing ring by complementary shape.
  • any type of complementarity can be used such as the tongues 12 complementary to the spaces between the threads 22. These complementarities are carried for one by the locking ring and for the other by the fixing ring.
  • the locking ring is made to translate so as to move the first end of said ring away from the shoulder 430 against which it was in support. In this way, the complementary forms are disengaged. Then, the unscrewing ring is unscrewed from the access pipe 43.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP17715176.8A 2016-04-07 2017-04-06 Pompe a dosage proportionnel, procede de montage et de demontage d'une telle pompe Active EP3440353B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL17715176T PL3440353T3 (pl) 2016-04-07 2017-04-06 Pompa dozowania proporcjonalnego, sposób montażu oraz demontażu takiej pompy

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1653055A FR3049992B1 (fr) 2016-04-07 2016-04-07 Pompe a dosage proportionnel, procede de montage et de demontage d'une telle pompe
PCT/EP2017/058249 WO2017174719A1 (fr) 2016-04-07 2017-04-06 Pompe a dosage proportionnel, procede de montage et de demontage d'une telle pompe

Publications (2)

Publication Number Publication Date
EP3440353A1 EP3440353A1 (fr) 2019-02-13
EP3440353B1 true EP3440353B1 (fr) 2020-02-12

Family

ID=56008803

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17715176.8A Active EP3440353B1 (fr) 2016-04-07 2017-04-06 Pompe a dosage proportionnel, procede de montage et de demontage d'une telle pompe

Country Status (20)

Country Link
US (1) US10724517B2 (ru)
EP (1) EP3440353B1 (ru)
JP (1) JP6946333B2 (ru)
KR (1) KR102305594B1 (ru)
CN (1) CN109072890B (ru)
AR (1) AR108190A1 (ru)
AU (1) AU2017248041B2 (ru)
CA (1) CA3019249C (ru)
DK (1) DK3440353T3 (ru)
EA (1) EA034732B1 (ru)
ES (1) ES2779012T3 (ru)
FR (1) FR3049992B1 (ru)
IL (1) IL261993B (ru)
MX (1) MX2018012203A (ru)
NZ (1) NZ746661A (ru)
PL (1) PL3440353T3 (ru)
PT (1) PT3440353T (ru)
SG (1) SG11201808417SA (ru)
WO (1) WO2017174719A1 (ru)
ZA (1) ZA201806635B (ru)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022184576A1 (fr) 2021-03-02 2022-09-09 Dosatron International Procede et pompe de dosage proportionnel a faible debit
FR3139604A1 (fr) * 2022-09-13 2024-03-15 Idromix Mécanisme de dosage d’une pompe – Système de verrouillage et amélioration de la précision du réglage

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2581164A (en) * 2019-02-06 2020-08-12 Mhwirth Gmbh Fluid pump, pump assembly and method of pumping fluid
USD933714S1 (en) * 2019-05-30 2021-10-19 Mixtron S.R.L. Metering pump
USD1006833S1 (en) * 2021-07-08 2023-12-05 Mixtron S.R.L. Pump for liquids
USD1009082S1 (en) * 2021-09-30 2023-12-26 Viscotec Pumpen- U. Dosiertechnik Gmbh Metering pump

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
FR2681646B1 (fr) * 1991-09-19 1995-05-19 Ody Ste Civile Rech Pompe comportant un systeme de dosage, et dispositif comportant une telle pompe, pour injection dans un liquide principal d'un additif.
US6183212B1 (en) * 1999-02-17 2001-02-06 Stanadyne Automotive Corp. Snap-in connection for pumping plunger sliding shoes
FR2896279B1 (fr) 2006-01-13 2008-02-29 Dosatron International Machine hydraulique, en particulier moteur hydraulique, et doseur comportant un tel moteur.
FR2896281B1 (fr) 2006-01-13 2008-02-29 Dosatron International Machine hydraulique, en particulier moteur hydraulique, a mouvement alternatif.
SE531679C2 (sv) * 2006-09-08 2009-06-30 Norden Machinery Ab Doseringspump
DE102008062552A1 (de) * 2008-12-16 2010-06-17 Mahle International Gmbh Kraftstofffilter
DE102009054938A1 (de) * 2009-12-18 2011-06-22 Robert Bosch GmbH, 70469 Kraftstoffhochdruckpumpe
FR2967218B1 (fr) * 2010-11-08 2016-09-02 Dosatron International Doseur proportionnel d'un liquide auxiliaire dans un liquide principal.
USD864252S1 (en) * 2017-08-16 2019-10-22 Dosatron International Metering pump

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022184576A1 (fr) 2021-03-02 2022-09-09 Dosatron International Procede et pompe de dosage proportionnel a faible debit
FR3120402A1 (fr) 2021-03-02 2022-09-09 Dosatron International Procede et pompe de dosage proportionnel a faible debit
FR3139604A1 (fr) * 2022-09-13 2024-03-15 Idromix Mécanisme de dosage d’une pompe – Système de verrouillage et amélioration de la précision du réglage

Also Published As

Publication number Publication date
PL3440353T3 (pl) 2020-07-27
SG11201808417SA (en) 2018-10-30
EA201892263A1 (ru) 2019-03-29
CA3019249A1 (fr) 2017-10-12
JP6946333B2 (ja) 2021-10-06
ZA201806635B (en) 2020-07-29
JP2019513934A (ja) 2019-05-30
DK3440353T3 (da) 2020-05-18
MX2018012203A (es) 2018-12-10
US10724517B2 (en) 2020-07-28
IL261993B (en) 2021-09-30
KR20180127409A (ko) 2018-11-28
KR102305594B1 (ko) 2021-09-24
NZ746661A (en) 2024-01-26
CN109072890A (zh) 2018-12-21
PT3440353T (pt) 2020-05-18
CA3019249C (fr) 2023-07-04
ES2779012T3 (es) 2020-08-13
FR3049992A1 (fr) 2017-10-13
FR3049992B1 (fr) 2018-04-20
IL261993A (en) 2018-10-31
AR108190A1 (es) 2018-07-25
CN109072890B (zh) 2020-03-24
AU2017248041B2 (en) 2022-06-02
AU2017248041A1 (en) 2018-11-15
WO2017174719A1 (fr) 2017-10-12
EA034732B1 (ru) 2020-03-13
BR112018070360A2 (pt) 2019-01-29
EP3440353A1 (fr) 2019-02-13
US20190120226A1 (en) 2019-04-25

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