EP3685045B1 - Verdrängerpumpe mit verbesserter reinigung - Google Patents

Verdrängerpumpe mit verbesserter reinigung Download PDF

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Publication number
EP3685045B1
EP3685045B1 EP18812244.4A EP18812244A EP3685045B1 EP 3685045 B1 EP3685045 B1 EP 3685045B1 EP 18812244 A EP18812244 A EP 18812244A EP 3685045 B1 EP3685045 B1 EP 3685045B1
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EP
European Patent Office
Prior art keywords
pump
piston
cylinder
pipe
shaft
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
EP18812244.4A
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English (en)
French (fr)
Other versions
EP3685045A1 (de
EP3685045C0 (de
Inventor
Fabrice Bariau
Yann BESNIER
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.)
Mouvex SAS
Original Assignee
Mouvex SAS
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Publication date
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Publication of EP3685045A1 publication Critical patent/EP3685045A1/de
Application granted granted Critical
Publication of EP3685045C0 publication Critical patent/EP3685045C0/de
Publication of EP3685045B1 publication Critical patent/EP3685045B1/de
Active 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
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F04C15/0065—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions for eccentric movement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2210/00—Fluid
    • F04C2210/20—Fluid liquid, i.e. incompressible
    • F04C2210/206—Oil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2210/00—Fluid
    • F04C2210/22—Fluid gaseous, i.e. compressible
    • F04C2210/221—Air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/60—Shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2280/00—Arrangements for preventing or removing deposits or corrosion

Definitions

  • the invention relates to the field of pumps, in particular to volumetric eccentric piston pumps. More particularly, the invention relates to a pump comprising means allowing improved cleaning in place (CIP).
  • CIP cleaning in place
  • CIP Cleaning In Place
  • Positive displacement pumps are among the pumps that can be cleaned by this process.
  • the documents WO9736107 A1 And US1497050A disclose similar positive displacement pumps.
  • a progressive cavity pump generally comprises a cylinder comprising a suction opening and sharing one end with a discharge zone. At this end, a piston is slidably mounted on the end of a drive shaft and is pressed by pressing means, such as springs, against the cylinder, thus blocking the passage of fluid.
  • the pressure generated by the auxiliary pump makes it possible to separate the piston from the cylinder and consequently the passage of a flow of cleaning liquid.
  • the resistance of the pressing means reduces the distance of this detachment, thus inducing pressure drops in the installation which prevents the passage of the entire cleaning flow through the pump.
  • volumetric eccentric piston pumps comprising a sleeve surrounding the shaft and formed of bellows whose interior remains at atmospheric pressure.
  • a sleeve being subjected externally to the pressure of the cleaning liquid, it then exerts a force in the same direction and the same direction as the pressing means.
  • the combined action of the pressing means and the sleeve on the piston therefore further reduces the separation distance between the cylinder and the piston and thereby increases the pressure drop generated by the pump.
  • the object of the present invention is to propose a volumetric pump allowing simplified cleaning in place as well as a method for cleaning such a pump.
  • the pump By blocking the piston in the off position of the cylinder, the pump behaves like an open valve and there is no longer any need to install a bypass system. The entire cleaning flow can therefore switch from suction to discharge. As a result, the pressure drop becomes very low and CIP cleaning is simplified.
  • the predetermined distance is between 2 and 10mm.
  • This distance determined experimentally and by simulations as sufficient distance for the entire cleaning flow to pass through the pump. This variation in distance is a function of the size of the pump.
  • the pump further comprises a sleeve arranged in the tubing around the shaft.
  • This sleeve comprises at least one metal bellows, which is tightly fixed by first fixing means to the first end of the pipe and by second fixing means to said end of the shaft, so as to prevent the transmission of fluids from the tubing to the shaft.
  • the means allowing the piston to be moved away from the cylinder are pneumatic means arranged to pressurize the cuff.
  • the pneumatic means comprise a pressurization pot communicating with the sleeve via the zone of transmission, said pressurization pot comprising an oil and is intended to be connected to a source of compressed air.
  • the pressurization pot makes it possible to completely fill the transmission area, it is also partially filled so that the oil level is in the pressurization pot. Then, by connecting this pressurization pot to a source of compressed air, the resulting pneumatic pressure acts on this oil surface as on a piston.
  • the volume of oil is therefore transferred from the pressurization pot to the transmission zone and then to the sleeve.
  • the increase in the volume of the cuff makes it possible to lengthen it and thereby to cause the piston to slide so as to move it away from the cylinder.
  • the distance of this gap can be adjusted by adjusting the pressure in the pressurization pot.
  • the distance between the cylinder and the piston is also kept substantially fixed. In this way, when the cleaning liquid is circulated between the suction and the discharge, the pressure drop becomes very low.
  • the pressurization pot comprises restriction means arranged to restrict the passage of fluid from the pot to the transmission zone and vice versa.
  • the restriction means may comprise an oil choke, a controllable solenoid valve.
  • the elastic means fixing the piston to the end of the shaft comprise at least one axial spring.
  • This spring is used to press the piston against the cylinder, in particular during the priming phases.
  • the discharge pressure also contributes to pressing the piston against the cylinder.
  • Such a spring can, for example, be formed from a set of spring washers.
  • the pump comprises at least one stop arranged to protect the axial spring.
  • the pump comprises at least one stop arranged to protect the axial spring.
  • the invention also relates to a method for cleaning a pump conforming at least to one of the pumps described above, in which the means making it possible to elastically separate the piston from the cylinder are implemented, then a cleaning fluid is circulated between the suction opening and the discharge opening.
  • FIG. 1 shows an eccentric piston volumetric pump 1 according to the invention as seen in longitudinal section.
  • the pump 1 comprises a tube 2 having a first end 21 and a second end 22 as well as a suction opening 23.
  • the first end 21 is integral with a transmission zone 3 which comprises means of transmission of the pump 1.
  • the second end 22 comprises a cylinder 24 and is integral with a discharge zone 4 which comprises a discharge opening 41.
  • a drive shaft 5 extends from transmission zone 3 into manifold 2. End 53 of shaft 5 is located at cylinder 24.
  • a sleeve 8 is arranged in the cylinder 2 around the shaft 5.
  • the sleeve 8 comprises a metal bellows in two parts 81, 82, for example steel.
  • the sleeve 8 is tightly fixed by first fixing means 83 to the first end 21 of the pipe 2 and by second fixing means 84 to the end 53 of the shaft.
  • first fixing means 83 to the first end 21 of the pipe 2
  • second fixing means 84 to the end 53 of the shaft.
  • Such a cuff is known per se to those skilled in the art. It is for example described in detail in the document WO97/36107 .
  • a piston 6 is arranged in the discharge zone 4 and slidably mounted at the end 53 of the shaft 5 and held by an axial spring 7 which presses it against the cylinder 24 so as to block any movement of fluid between the pipe 2 and the discharge area 4.
  • the second fixing means 84 of the sleeve are also integral with the piston and can therefore slide on the end 53 of the shaft 5 at the same time as the piston.
  • an auxiliary pump is connected to the suction opening 23 to send a cleaning liquid intended through the pump and out of the discharge opening 41.
  • the pump 1 comprises means for moving the piston 6 away from the cylinder 2 and maintaining it at a predetermined distance from the latter to allow movement of the cleaning fluid between the pipe 2 and the zone of repression 4.
  • the pump according to the invention and as represented by the figure 1 , comprises a pressurization pot 9 communicating with the transmission zone 3.
  • the transmission is filled with lubricating oil up to a certain level.
  • pressurization pot 9 The addition of the pressurization pot 9 to the pump 1 makes it possible to completely fill the transmission zone 3 with oil and the oil level rises to a certain level in the pressurization pot 9.
  • the pressurization pot 9 is connected to a source of compressed air, not shown.
  • Control means make it possible to control the pneumatic pressure generated by the compressed air which acts on the oil surface as on a piston.
  • the volume of oil is therefore transferred from the pressurization pot to the transmission zone and then to the cuff.
  • the increase in the volume of the cuff makes it possible to lengthen it and make the piston slide to move it away from the cylinder.
  • the distance of this gap can be adjusted by adjusting the level of pressure in the pressurization pot.
  • the distance between the cylinder and the piston is also kept substantially fixed.
  • the cleaning liquid can pass entirely from the suction to the discharge with a reduced pressure drop.
  • the sufficient distance is dependent on the size of the pump. It is preferably between 2 and 10 mm.
  • the pressurization pot 9 comprises restriction means 91 making it possible to control the displacement of oil between the pressurization pot 9 and the transmission zone.
  • the restriction means 91 comprise an oil restrictor.
  • restriction means 91 may be different, for example a controllable solenoid valve.
  • the oil passage control keeps the piston detached from the cylinder during pressure peaks around the bellows likely to be generated during the circulation of the cleaning liquid.
  • THE figures 2 and 3 represent a zoom on the end 53 of shaft 5 respectively in a known pump and in an improved pump according to the invention.
  • the second fixing means 84, 84' is integral with the piston 6, the axial spring 71 acts on the end 840, 840' of the second fixing means 84, 84' to press the piston 6 against the cylinder 24.
  • the pump shown in picture 3 provides an abutment composed of two parts 72, 73, secured respectively to the end 840 of the second fixing means 84 and to the end 53 of the shaft 5.
  • the two parts 72, 73 of the abutment are in contact, the piston movement is stopped and the pressure on the spring does not increase.
  • the pump may not include a cuff.
  • the means for moving the piston 6 away from the cylinder 2 and maintaining it at a predetermined distance can be different, for example, from controlled mechanical means.
  • the invention also relates to a method for cleaning a pump 1 according to the invention comprising at least some of the characteristics described above, in which the means making it possible to elastically separate the piston 6 from the cylinder 24 are implemented, then a cleaning fluid is circulated between the suction opening 23 and the discharge opening 41.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Claims (10)

  1. Verdrängerpumpe (1) mit Exzenter, umfassend:
    - ein Rohr (2) mit einem ersten Ende (21), das mit einer Übertragungszone (3) verbunden ist, und einem zweiten Ende (22), das in einen Zylinder (24) mündet, der mit einer Abgabezone (4) fest verbunden ist, wobei das Rohr (2) eine Ansaugöffnung (23) und die Abgabezone eine Abgabeöffnung (41) umfasst,
    - eine Antriebswelle (5), die sich zwischen der Übertragungszone 3 und dem Rohr erstreckt, wobei sich ein Ende (53) auf der Höhe des Zylinders (24) befindet,
    - einen Kolben (6), der in der Abgabezone (4) angeordnet und verschiebbar am Ende (53) der Welle (5) angebracht ist, indem er durch elastische Mittel (7) gegen den Zylinder (24) gedrückt wird, um eine Fluidbewegung zwischen dem Rohr (2) und der Abgabezone (4) zu blockieren,
    dadurch gekennzeichnet, dass die Pumpe (1) ferner Mittel (8, 9) umfasst, um den Kolben federnd von dem Zylinder (24) zu trennen und ihn in einem vorbestimmten Abstand davon zu halten.
  2. Pumpe (1) nach Anspruch 1, wobei der vorbestimmte Abstand zwischen 2 mm und 10 mm beträgt.
  3. Pumpe (1) nach einem der Ansprüche 1 oder 2, ferner umfassend eine Hülse (8), die in dem Rohr (2) um die Welle (5) herum angeordnet ist, und mindestens einen Metallbalg (81, 82), der durch erste Befestigungsmittel (83) an dem ersten Ende (21) des Rohrs (2) und durch zweite Befestigungsmittel (84) an dem Ende (53) der Welle undurchlässig befestigt ist, um die Übertragung von Fluiden aus dem Rohr (2) zur Welle (5) zu verhindern.
  4. Pumpe (1) nach Anspruch 3, bei der die Mittel zum Wegbewegen des Kolbens (6) von dem Zylinder (24) pneumatische Mittel (9) sind, die angeordnet sind, um die Hülse (8) unter Druck zu setzen.
  5. Pumpe (1) nach Anspruch 4, bei der die pneumatischen Mittel einen Drucktopf (9) umfassen, der mit der Hülse über die Übertragungszone (3) in Verbindung steht, wobei der Drucktopf (9) ein Öl enthält und dazu bestimmt ist, an eine Druckluftquelle angeschlossen zu werden.
  6. Pumpe (1) nach Anspruch 5, bei der der Drucktopf (9) Begrenzungsmittel (91) umfasst, die angeordnet sind, um den Fluiddurchgang von dem Topf zu der Übertragungszone und umgekehrt einzuschränken.
  7. Pumpe (1) nach Anspruch 6, bei der die Begrenzungsmittel (91) eine Öldrossel umfassen.
  8. Pumpe (1) nach einem der Ansprüche 1 bis 7, bei der die den Kolben (6) befestigenden elastischen Mittel am Ende (53) der Welle (5) mindestens eine axiale Feder (71) umfassen.
  9. Pumpe (1) nach Anspruch 8, umfassend mindestens einen Anschlag (72, 73), der angeordnet ist, um die axiale Feder zu schützen.
  10. Verfahren zur Reinigung einer Pumpe nach einem der Ansprüche 1 bis 9, bei dem die Mittel zum elastischen Trennen des Kolbens (6) vom Zylinder (24) implementiert werden, dann eine Reinigungsflüssigkeit zwischen der Saugöffnung (23) und der Abgabeöffnung (41) zirkuliert.
EP18812244.4A 2017-12-14 2018-11-07 Verdrängerpumpe mit verbesserter reinigung Active EP3685045B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1762157A FR3075280B1 (fr) 2017-12-14 2017-12-14 Pompe volumetrique a nettoyage ameliore
PCT/FR2018/052748 WO2019115890A1 (fr) 2017-12-14 2018-11-07 Pompe volumétrique à nettoyage amélioré

Publications (3)

Publication Number Publication Date
EP3685045A1 EP3685045A1 (de) 2020-07-29
EP3685045C0 EP3685045C0 (de) 2023-06-07
EP3685045B1 true EP3685045B1 (de) 2023-06-07

Family

ID=61132717

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18812244.4A Active EP3685045B1 (de) 2017-12-14 2018-11-07 Verdrängerpumpe mit verbesserter reinigung

Country Status (8)

Country Link
US (1) US11319955B2 (de)
EP (1) EP3685045B1 (de)
JP (1) JP7227972B2 (de)
CN (1) CN111295517B (de)
CA (1) CA3084497A1 (de)
ES (1) ES2950566T3 (de)
FR (1) FR3075280B1 (de)
WO (1) WO2019115890A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3093140B1 (fr) * 2019-02-26 2022-05-06 Mouvex Pompe volumétrique à piston excentré

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1497050A (en) * 1923-10-25 1924-06-10 Hill Compressor & Pump Company Rotary pump
GB1255799A (en) * 1967-12-18 1971-12-01 Krauss Maffei Ag Rotary positive fluid displacement apparatus
US3671143A (en) * 1970-11-05 1972-06-20 Trw Inc Flat side valve for pressure balanced power steering pump with improved aspirator action
FR2153129B2 (de) * 1971-06-01 1974-01-04 Vulliez Paul
EP0214164B1 (de) * 1985-02-27 1990-05-23 Gutag Innovations Ag Verdrängermaschine, insbesondere -pumpe
JPH02277951A (ja) * 1989-04-18 1990-11-14 Matsushita Electric Ind Co Ltd シール装置
FR2746452B1 (fr) * 1996-03-22 1998-04-24 Mouvex Dispositif d'entrainement rotatif etanche a excentricite, notamment pour pompe volumetrique
JP3366876B2 (ja) * 1999-04-08 2003-01-14 株式会社ナカキン ロータリーポンプ
KR100482138B1 (ko) * 2002-11-22 2005-04-14 현대자동차주식회사 쇽 업쇼버의 자기 청정장치
US6884047B1 (en) * 2003-10-20 2005-04-26 Varian, Inc. Compact scroll pump
CN202768717U (zh) * 2012-09-18 2013-03-06 浙江名震机械制造有限公司 自洁式减震器

Also Published As

Publication number Publication date
BR112020007446A2 (pt) 2020-10-27
ES2950566T3 (es) 2023-10-11
EP3685045A1 (de) 2020-07-29
JP7227972B2 (ja) 2023-02-22
JP2021507160A (ja) 2021-02-22
EP3685045C0 (de) 2023-06-07
CN111295517A (zh) 2020-06-16
WO2019115890A1 (fr) 2019-06-20
CN111295517B (zh) 2022-05-10
US11319955B2 (en) 2022-05-03
US20200386226A1 (en) 2020-12-10
CA3084497A1 (fr) 2019-06-20
FR3075280B1 (fr) 2019-11-22
FR3075280A1 (fr) 2019-06-21

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