EP0736689A1 - Ensemble de pompes de dosage et d'injection - Google Patents

Ensemble de pompes de dosage et d'injection Download PDF

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Publication number
EP0736689A1
EP0736689A1 EP96103365A EP96103365A EP0736689A1 EP 0736689 A1 EP0736689 A1 EP 0736689A1 EP 96103365 A EP96103365 A EP 96103365A EP 96103365 A EP96103365 A EP 96103365A EP 0736689 A1 EP0736689 A1 EP 0736689A1
Authority
EP
European Patent Office
Prior art keywords
piston
dosing
pump arrangement
arrangement according
injection pump
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.)
Ceased
Application number
EP96103365A
Other languages
German (de)
English (en)
Inventor
Klaus Obermann
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.)
Klaus Obermann GmbH
Original Assignee
Klaus Obermann GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Klaus Obermann GmbH filed Critical Klaus Obermann GmbH
Publication of EP0736689A1 publication Critical patent/EP0736689A1/fr
Ceased 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
    • 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
    • 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
    • F04B9/109—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 plural pumping chambers
    • F04B9/111—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 plural pumping chambers with two mechanically connected pumping members
    • F04B9/115—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 plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by two single-acting liquid motors, each acting in one direction
    • 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
    • F04B2201/00—Pump parameters
    • F04B2201/06—Valve parameters
    • F04B2201/0601—Opening times
    • F04B2201/06011—Opening times of the inlet valve only

Definitions

  • the invention relates to a metering and injection pump arrangement for delivering at least two flowable media, each medium being assigned a pump.
  • Such pump arrangements are known. They are used, for example, in the construction industry to convey sealing compounds consisting of a plurality of components to be mixed with one another to the place of use, the components being mixed with one another in a manner known per se in a line network downstream of the pumps.
  • Such masses should generally harden quickly by mixing the individual components, so that the problem of cleaning the pipeline network exists from the point at which the media flow together. This cleaning is usually carried out by a so-called "rinsing" of the line network with a single one of the various components, for which purpose only the pump delivering this component is put into operation.
  • the tolerance limits of the mixing ratio required for correct curing are very narrow, so that the mixing ratio must be adhered to exactly.
  • the object of the invention is to create a pump arrangement of the type mentioned at the outset which, with an extremely compact design, allows the conveying of media in exactly constant amounts, which enables the line network downstream of the pumps to be flushed with one of the conveyed media and which one can be controlled in a simple manner so that no medium is conveyed into the line network downstream of the pump arrangement when the pumps are running.
  • a metering and injection pump arrangement of the type mentioned, in which the pump assigned to each medium is designed as a double-piston pump with two cylinders and two single-acting pistons alternating in their working stroke, all pistons being connected to a common drive device and each cylinder is provided with an inlet connected via a line to a supply for the respective medium to be conveyed and an outlet for this medium, each inlet being associated with an inlet valve which can be controlled by a control device and each outlet with an outlet valve preventing the backflow of conveyed medium .
  • Such a metering and injection pump arrangement advantageously allows three different operating states to be set without having to stop the pumps: in one In the conveying operating state, the media to be conveyed are conveyed in amounts precisely determined by the displacement of the double-piston pump assigned to the respective medium, it being possible to ensure that the associated inlet valve is always open during the suction stroke of a piston by the design of the inlet valves as controllable inlet valves. It should be mentioned at this point that pump arrangements are also known for conveying a plurality of flowable media to be mixed with one another, in which the media are mixed with one another before entering the pump.
  • the pump arrangement according to the invention also allows a cleaning operating state to be set in which the line network downstream of the pump arrangement is flushed with one or more media without the pumps or the pump provided for the other media or the other medium having to be stopped.
  • the pump arrangement according to the invention has the great advantage that all pumps can nevertheless be driven by a common drive, which on the one hand ensures a constant quantity and thus mixing ratio in the conveying operation, and on the other hand enables a light and compact design, in particular for mobile use of the pump arrangement.
  • the pump arrangement advantageously allows the setting of a circulating operating state in which all pumps run without any medium being conveyed into the subordinate pipeline network. This makes it possible to easily move an application means, for example a syringe, provided at the outlet end of the line network downstream of the pump arrangement into another position without further conveying the mixture and without having to shut down the entire pump arrangement.
  • an application means for example a syringe
  • the pump arrangement according to the invention thus combines various advantages: it allows the delivery of at least two media - but if necessary by adding more pumps - media with proportions precisely predetermined by the displacement of the respective pistons, but only a single drive is required; it enables the application means downstream of the pump arrangement to be moved without having to switch off the drive of the pump arrangement, and it allows the line network downstream of the pump arrangement to be selected, e.g. for rinsing - to be loaded with only one or more of the media to be conveyed.
  • self-closing check valves can be used as outlet valves and the pumps can be designed as plunger pumps with plungers.
  • the metering and injection pump arrangement is particularly easy to control if the inlet valves are each designed to be hydraulically controllable and are each connected to a pressure medium source via a line, the control device having switched on directional valves in the lines to the hydraulically controllable valves, which have both an alternating and a Allow simultaneous activation of the inlet valves.
  • Each double piston pump can be assigned at least one separate directional control valve.
  • the cylinders of each double-piston pump are arranged with an aligned longitudinal central axis and a piston outlet end facing one another.
  • the separate piston-pumping media with parallel longitudinal center axes can be arranged at a lateral distance from each other. Both arrangements enable the ends of the pistons protruding from the associated cylinders to be connected to a common transverse web, which has the advantage that the pistons of the double-piston pumps inevitably carry out synchronous lifting movements when the drive engages this transverse web.
  • a reversible hydraulic linear drive can serve as the drive.
  • this is formed by two single-acting piston-cylinder units arranged on opposite sides of the crossbar with a working stroke acting in the opposite direction and is connected to the pressure medium source via a directional control valve which controls the alternating application of pressure to the two single-acting piston-cylinder units.
  • the pistons of the single-acting piston-cylinder units forming the linear drive can expediently be designed as plungers or plungers, the ends of the pistons emerging from the cylinders abutting on opposite sides of the crosspiece.
  • the cylinders of the double-piston pumps that convey the flowable media are releasably attached to a common support structure. This allows easy disassembly of the individual cylinders for cleaning and transport purposes, for example.
  • the pump arrangement functionally comprises five groups: the double-piston pumps 10, 20 assigned to the two media to be pumped, the drive 30 driving the pumps, the valve control 40 and the pressure source 50.
  • the containers 60 containing the two media are shown in the drawing. 70 shown.
  • the line network downstream of the two double-piston pumps for the media to be pumped is only indicated by lines 81, 82.
  • the double-piston pumps 10, 20 assigned to each medium M1, M2 consist of two cylinders 11, 21 and two single-acting pistons 12, 22, which alternately perform their working stroke.
  • the pistons 12, 22 are included Expediently designed as a plunger or plunger, which has advantages in particular when conveying media containing solid, undissolved substances (eg sand).
  • Each cylinder 11, 21 has an inlet 14, 24 connected via a line 13, 23 to a supply 60, 70 for the medium M1, M2 to be conveyed, and an outlet 15, 25 for this medium, each outlet 15, 25 an the backflow of pumped medium preventing outlet valve 16, 26 is assigned.
  • These outlet valves 16, 26 are designed here as self-closing check valves, but can also be designed as, for example, hydraulically controllable valves.
  • An inlet valve 17, 27 which can be controlled by the control device 40 is assigned to each inlet 14, 24, which prevents a too small delivery quantity being sucked in as a result of a simple non-return valve getting stuck and thus the desired mixing ratio not being maintained.
  • the inlet valves 17, 27 are designed to be hydraulically controllable and are connected to the pressure medium source 50 via a line 18, 28, respectively.
  • the control device 40 has in the lines 18, 28 to the hydraulically controllable valves 17, 27 on directional valves 19, 29 which allow both an alternating and a simultaneous actuation of the inlet valves 17, 27.
  • the cylinders 11, 21 of each double-piston pump 10, 20 are arranged with the aligned longitudinal central axis and the piston outlet end facing one another.
  • the separate media-promoting double-piston pumps 10, 20 are located at a lateral distance from one another with parallel longitudinal central axes.
  • the ends of the pistons 12, 22 protruding from the cylinders 11, 21 are connected to a common crosspiece 33, on which the reversible hydraulic linear drive 30 acts.
  • the linear drive 30 is formed by two single-acting piston-cylinder units arranged on opposite sides of the crosspiece 33, each consisting of a cylinder 31 and a piston 32 with a working stroke acting in the opposite direction, and is via an alternating action of the two pistons 32 with pressure medium controlling directional valve 39 is connected to the pressure medium source 50 by means of a line 38.
  • the pistons 32 of the linear drive 30 are also designed as punger or plunger pistons, the ends of the pistons 32 emerging from the cylinders 31 abutting on opposite sides of the crosspiece 33.
  • a first check valve 61, 71 preventing the backflow of the media into the storage containers 60, 70 and a line bridge 62, 72 bypassing this first check valve with a connection to the first check valve 61, 71 opposed second check valve 63, 73 integrated.
  • Both valves 61, 63; 71, 73 are self-closing check valves, but the first check valve 61, 71 opens at low pressure, while the second check valve 63, 73 does so only at relatively high pressure.
  • This configuration of the lines 13, 23 to the storage containers 60, 70 avoids fluidic problems, in particular the build-up of excess pressures in circulation mode, that is to say if no medium is to be conveyed into the line network downstream of the pump arrangement.
  • this subordinate line network is only indicated by lines 81, 82. Both lines 81, 82 flow together in a manner known per se at a mixing point, where the two media M1 and M2 are mixed with one another, in order then to finally exit from a suitable application device, for example a nozzle head.
  • FIG. 2 shows the pumps 10, 20 and the drive 30 according to FIG. 1 in a perspective view, but the storage containers for the media to be conveyed, the lines for controlling the valves of the pumps and the hydraulic linear drive and the pressure source are not are shown.
  • the free ends of the pistons 12, 22 of the two double-piston pumps 10, 20 and the pistons 32 of the hydraulic linear drive 30 lie on a common one Cross bar 33 and therefore inevitably perform synchronous movements when the cross bar 33 is moved by the linear drive 30.
  • the pistons 12, 22 of the two double-piston pumps 10, 20 are dimensioned the same, so that with such a pump arrangement there is always a 1: 1 mixing ratio of the two media to be delivered. If other mixing ratios are desired, the double piston pumps can be dimensioned differently.
  • double-piston pumps 10, 20 shown In addition to the two double-piston pumps 10, 20 shown, further double-piston pumps can be added, which can then also be connected to the crossbar 33 to be lengthened accordingly, which also enables mixtures of three or more media to be made.
  • the media are each fed via lines 13, 23 to the double piston pumps 10, 20, one of the inlet valves 17, 27 described above being assigned to the inlet of each cylinder 11, 12.
  • the piston-side end blocks 90 assigned to the cylinders 11, 21 of the double-piston pumps 10, 20 as well as to the cylinder-shaped jacketed cylinders 31 of the linear drive 30 are used for easy and detachable fastening of the double-piston pumps and the drive to a common support structure, not shown here.
  • each end block 90 has two grooves 91 which extend over the entire length of the block and which, when the pumps are arranged in parallel, complement one another in parallel to form an elongated groove, into which a support structure with a profile which is at least partially complementary to the groove is then inserted or fitted can be.
  • the dosing and injection pump arrangement described works as follows:
  • the pistons 32 of the drive 30 are alternately pressurized from the pressure source 50 by switching the directional valve 39 via the line 38 and thus move the crosspiece 33 back and forth.
  • the pistons 12, 22 of the double-piston pumps 10, 20 are in turn the associated cylinders 11, 21 moves.
  • the inlet valves 17, 27 are now opened and closed alternately, so that the corresponding medium flows into the associated cylinder 11, 21 during the suction stroke of a piston 12, 22.
  • the associated inlet valve 17, 27 is closed and the piston 11, 21 presses the medium out of the cylinder 11, 21 against the resistance of the outlet valve 16, 26.
  • the inlet valves of a double-piston pump for example the double-piston pump 20, are permanently open, while the inlet valves 17 of the double-piston pump 10 open and close mutually, as in the conveying mode.
  • the pressure generated during the working stroke of the pistons 22 in the cylinders 21, however, is not large enough when the inlet valve 27 is open to open the outlet valve 26. Therefore, the medium M2 is only moved back and forth between the cylinders 21 and in the line 23, but does not get into the line network downstream of the pumps, so that there is no mixing of the two media M1 and M2.
  • the inlet valves 17 of the double-piston pump 10 are permanently open, so that no pressure opening the outlet valves 16, 26 can build up in the cylinders 11, 21.
  • an application means provided at the end of the line network downstream of the pumps, for example a nozzle or the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Accessories For Mixers (AREA)
  • Details Of Reciprocating Pumps (AREA)
EP96103365A 1995-03-30 1996-03-05 Ensemble de pompes de dosage et d'injection Ceased EP0736689A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19511758 1995-03-30
DE1995111758 DE19511758A1 (de) 1995-03-30 1995-03-30 Dosier- und Injektionspumpenanordnung

Publications (1)

Publication Number Publication Date
EP0736689A1 true EP0736689A1 (fr) 1996-10-09

Family

ID=7758214

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96103365A Ceased EP0736689A1 (fr) 1995-03-30 1996-03-05 Ensemble de pompes de dosage et d'injection

Country Status (2)

Country Link
EP (1) EP0736689A1 (fr)
DE (1) DE19511758A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29706074U1 (de) * 1997-04-07 1997-07-31 WiWa Wilhelm Wagner GmbH & Co KG, 35633 Lahnau Dosierpumpe
WO2002031358A1 (fr) * 2000-10-13 2002-04-18 Cps Color Group Oy Distributeur de liquide
CN102829569A (zh) * 2011-11-03 2012-12-19 龚炳新 新型制冷设备
WO2016000578A1 (fr) * 2014-07-04 2016-01-07 龚炳新 Dispositif de réfrigération
CN113530782A (zh) * 2021-07-15 2021-10-22 中铁工程装备集团有限公司 一种具有快速压力切断保护功能的大排量泵及其保护方法

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19947443A1 (de) * 1999-10-02 2001-04-05 Messer Griesheim Gmbh Kompressor für feuchte Gase
DE10135495A1 (de) * 2001-07-20 2003-02-06 Micro Mechatronic Technologies Dosierpumpe
DE102009029607A1 (de) * 2009-09-18 2011-03-24 Henkel Ag & Co. Kgaa Ausgabesystem für mehrere Massen
CN102721223B (zh) * 2011-11-03 2016-01-20 龚炳新 新型制冷机
WO2014040482A1 (fr) * 2012-09-13 2014-03-20 Gong Bingxin Appareil de réfrigération
CN110090570A (zh) * 2019-06-12 2019-08-06 深圳市亚辉龙生物科技股份有限公司 配液泵和配液装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1002841A (en) * 1962-10-04 1965-09-02 Singer Cobble Ltd Improvements in reciprocating metering pumps
GB1503648A (en) * 1975-04-23 1978-03-15 Jennings G Pumping apparatus
US4919597A (en) * 1988-06-15 1990-04-24 Specified Equipment Systems Co., Inc. Pump apparatus for multiple component fluids

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE634017C (de) * 1933-10-13 1936-08-17 Atlas Werke Ag Vorrichtung zur Foerdermengenregelung waehrend des Betriebes fuer Kolbenpumpen mit Kurbelwellenantrieb und unveraenderlichem Kolbenhub
DE1528589A1 (de) * 1966-09-06 1970-01-29 Storek Dipl Ing Herbert Regelbare Kolbendruckpumpe
DE3028396A1 (de) * 1980-07-26 1982-02-11 Wepuko-Hydraulik GmbH & Co Pumpen- und Kompressorenfabrik, 7418 Metzingen Hochdruck-kolbenpumpe
DE3609744A1 (de) * 1986-03-22 1987-10-01 Bruker Gmbh Meerestechnik Einrichtung zum wechselweisen ueberfuehren eines druckmediums zwischen reservoiren unterschiedlichen druckniveaus
DE3624976A1 (de) * 1986-07-24 1988-02-04 Sinsch Joachim Vorrichtung zum dosieren und foerdern von fluessigen und pastoesen medien
DE3703929A1 (de) * 1987-02-09 1988-08-18 Karl Lenhardt Vorrichtung zum foerdern von zwei zaehfluessigen oder pastoesen substanzen in vorgegebenem mengenverhaeltnis aus zwei vorratsbehaeltern zu einer oder mehreren duesen
US5158438A (en) * 1991-08-02 1992-10-27 Graco Inc. Quick mount pump frame

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1002841A (en) * 1962-10-04 1965-09-02 Singer Cobble Ltd Improvements in reciprocating metering pumps
GB1503648A (en) * 1975-04-23 1978-03-15 Jennings G Pumping apparatus
US4919597A (en) * 1988-06-15 1990-04-24 Specified Equipment Systems Co., Inc. Pump apparatus for multiple component fluids

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29706074U1 (de) * 1997-04-07 1997-07-31 WiWa Wilhelm Wagner GmbH & Co KG, 35633 Lahnau Dosierpumpe
WO2002031358A1 (fr) * 2000-10-13 2002-04-18 Cps Color Group Oy Distributeur de liquide
CN102829569A (zh) * 2011-11-03 2012-12-19 龚炳新 新型制冷设备
CN102829569B (zh) * 2011-11-03 2015-10-07 龚炳新 新型制冷设备
WO2016000578A1 (fr) * 2014-07-04 2016-01-07 龚炳新 Dispositif de réfrigération
CN113530782A (zh) * 2021-07-15 2021-10-22 中铁工程装备集团有限公司 一种具有快速压力切断保护功能的大排量泵及其保护方法
CN113530782B (zh) * 2021-07-15 2022-07-08 中铁工程装备集团有限公司 一种具有快速压力切断保护功能的大排量泵及其保护方法

Also Published As

Publication number Publication date
DE19511758A1 (de) 1996-10-02

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