EP0446206A1 - Procede et dispositif pour la commande d'une pompe a liquides epais a deux cylindres. - Google Patents

Procede et dispositif pour la commande d'une pompe a liquides epais a deux cylindres.

Info

Publication number
EP0446206A1
EP0446206A1 EP89908162A EP89908162A EP0446206A1 EP 0446206 A1 EP0446206 A1 EP 0446206A1 EP 89908162 A EP89908162 A EP 89908162A EP 89908162 A EP89908162 A EP 89908162A EP 0446206 A1 EP0446206 A1 EP 0446206A1
Authority
EP
European Patent Office
Prior art keywords
reversing
delivery
pump
hydraulic
cylinders
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.)
Granted
Application number
EP89908162A
Other languages
German (de)
English (en)
Other versions
EP0446206B1 (fr
Inventor
Hartmut Benckert
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.)
Putzmeister Concrete Pumps GmbH
Original Assignee
Putzmeister Werk Maschinenfabrik 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 Putzmeister Werk Maschinenfabrik GmbH filed Critical Putzmeister Werk Maschinenfabrik GmbH
Publication of EP0446206A1 publication Critical patent/EP0446206A1/fr
Application granted granted Critical
Publication of EP0446206B1 publication Critical patent/EP0446206B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/02—Piston machines or pumps characterised by having positively-driven valving the valving being fluid-actuated
    • F04B7/0233—Piston machines or pumps characterised by having positively-driven valving the valving being fluid-actuated a common distribution member forming a single discharge distributor for a plurality of pumping chambers
    • F04B7/0258—Piston machines or pumps characterised by having positively-driven valving the valving being fluid-actuated a common distribution member forming a single discharge distributor for a plurality of pumping chambers and having an orbital movement, e.g. elbow-pipe type members
    • 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
    • F04B9/117—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 the pumping members not being mechanically connected to each other
    • F04B9/1176—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 the pumping members not being mechanically connected to each other the movement of each piston in one direction being obtained by a single-acting piston liquid motor
    • F04B9/1178—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 the pumping members not being mechanically connected to each other the movement of each piston in one direction being obtained by a single-acting piston liquid motor the movement in the other direction being obtained by a hydraulic connection between the liquid motor cylinders

Definitions

  • The. invention relates to a method and a device for controlling a thick matter umpe with two conveying cylinders, which open into a material feed container via front openings and by means of at least one hydraulic reversing pump and hydraulic drive cylinders 2 actuated in push-pull manner, with a delivery cylinder within the material feed container Arranged, alternately connected on the inlet side to the openings of the delivery cylinders and hydraulically actuated pipe separators which open the respective other openings and which can be connected on the outlet side to a delivery line, a reversing process of the pipe switch being triggered each time the pressure stroke in the delivery cylinders is terminated and during the Um Kunststoffvor ⁇ the thick matter feed is interrupted.
  • a method for controlling a two-cylinder thick matter pump of this type is known (DE-OS 32 53 576), in which both the drive cylinders of the delivery cylinders and the hydraulic actuating organs of the pipe switch are operated directly with the pressure oil delivered by the hydraulic reversing pump . be charged.
  • 2/2-way seat valves are installed in the lines of the main delivery circuit leading to the drive cylinders, which in turn can be controlled via a deceleration valve.
  • the reversing pump is switched over by an electrical end position signal immediately upon completion of a pressure stroke triggered.
  • the delay valve is reversed at the moment the reversing pump is switched over so that the 2/2 e-seat valves are brought into their closed position are so that the pressure medium cannot flow from the reversing pump into the lines leading to the drive cylinders.
  • a sufficient pressure builds up in the respective high-pressure line leading to the actuating members in order to switch through the hydraulic actuating members of the pipe switch via a reversing valve.
  • the switching of the reversing valve is delayed by means of a throttle chain until the pipe switch is switched over. Then the 2/2-way seat valves are opened again for both flow directions.
  • the invention is based on the object of developing a method and a device for controlling a thick matter pump of the type specified at the outset, with which hydraulic sequence control of the drive cylinders and the pipe switch is possible without fittings in the main oil circuit.
  • a preferably hydraulic or electrical end position signal for triggering the reversing process is tapped on the pipe switch or on its hydraulic actuating members after each switchover process.
  • the pressure oil supply to the actuators of the pipe switch is interrupted or reversed with compensation for the oil flow reversal in the main circuit.
  • the hydraulic actuating organs of the pipe switch are expediently held under the action of the pressure generated by the reversing pump until a reversal process is triggered when the pressure stroke is ended while maintaining the conveying direction of the reversing pump.
  • the delivery volume and / or the delivery pressure of the reversing pump is changed while maintaining the delivery direction.
  • the reversing pump can be briefly controlled to the maximum delivery volume and can then be readjusted according to a predetermined delivery volume or delivery pressure.
  • the free-flow circuit according to the invention enables at least one additional reversing pump to be connected in parallel to the main circuit in the event of higher demands on the delivery rate, without additional measures, in particular without exchanging other fittings.
  • a device for carrying out the method according to the invention advantageously has an adjusting and regulating mechanism for setting the delivery direction and, if appropriate, the delivery rate of the reversing pump, which can be acted upon with hydraulic or electrical end position signals that can be tapped at the pipe switch or at its hydraulic actuating members.
  • the hydraulic actuators of the pipe switch can be acted upon with pressure oil branched from the valve-free main circuit leading from the reversing pump to the drive cylinders.
  • a directional control valve which reverses the direction of the pressure oil supply is expediently arranged in the hydraulic line branching from the main circuit and leading to the hydraulic actuating elements of the pipe switch and can be actuated via a pilot control signal which responds to the conveying direction of the reversing pump.
  • a further directional valve which can be actuated by the position signals of the conveying cylinder or its drive cylinders, can be arranged, which can be switched over upon completion of a pressure stroke and which triggers the reversing process of the pipe switch.
  • the single figure shows the circuit of a control arrangement for a free-flow sequence control of drive cylinders and tubular switch cylinders in a single-circuit arrangement.
  • the thick matter pump essentially consists of two delivery cylinders 1, 1 ', the front openings 2, 2' of which open into a material container (not shown) and can be connected alternately to a delivery line 4 via a pipe switch 3 during the pressure stroke.
  • the delivery cylinders will be 1,1 '.
  • Via hydraulic drive cylinders 5, 5 'and the reversing hydraulic pump 6, which is designed as a swash plate axial piston pump in the exemplary embodiment shown, is driven in push-pull mode.
  • the delivery pistons 7,7 ' are connected to the pistons 8,8' of the drive cylinders 5,5 'via a common piston rod 9,9'.
  • a water box 10 through which the piston rods 9, 9 'extend.
  • the drive cylinders 5, 5 ' are pressurized with pressure oil on the bottom side via the pressure lines 11, 11' of the main circuit with the aid of the reversing pump 6 and are hydraulically connected to one another at their rod-side end via a transverse line 12.
  • a pressure compensation line 14 which contains a check valve 13 and bridges the relevant drive piston 8 'in its end positions, is arranged at the two ends of the drive cylinder 5'.
  • the direction of movement of the drive piston 8,8 * and thus the delivery piston 7,7 ' is reversed in that the swash plate 15 of the reversing pump 6 is triggered by a reversing signal is swung through the zero position and thus the direction of delivery of the pressure oil in the lines 11, 11 'of the main circuit changes in the free flow.
  • the delivery rate of the reversing pump 6 is determined at a predetermined drive speed by the swivel angle of the swash plate 15.
  • the swash plate angle and thus the delivery amount is adjustable in proportion to a control pressure p which actuates the actuating cylinder 18 via the lines 16, 17 and 17 'and the reversing valve 20 located in the relevant line path.
  • the control pressure p can be varied in accordance with the switching states of the thick matter pump using hydraulic or electrical means, not shown.
  • pressure regulators 70 and 71 are provided, the control inputs of which can be connected via a changeover valve 72 or a directional control valve 73 to the line 11, 11 'of the main circuit which carries high pressure or low pressure.
  • the switchover of the pipe switch 3 takes place via the hydrocyliners 21, 21 r , which are preferably designed as plunger cylinders, and directly via the lines 22, 22 'branched off from the main circuit, the reversing valve 30 and the pressure lines 23, 23' of the reversing pump 6 are supplied with pressurized oil.
  • the pilot control of the U control valve 30 takes place hydraulically via the lines 24, 24 ', which via the directional control valves 31 and 40 with the control pressure, together with the reversing pump 6 driven auxiliary pump 25 can be acted upon.
  • the directional control valve 31 is dimensional x or over the electrically or hydraulically gege ⁇ appropriate, ⁇ tapped Endlage ⁇ sig- xx of the drive cylinder 5 operable rend das.-way valve 40 in accordance with the quaint ⁇ in the leading to the actuating cylinder 18 control lines 17,17 ' prevailing pressure over the lines 28,28 'is reversible.
  • the main control valve 20, which determines the delivery direction of the reversing pump 6, is actuated via end position signals of the pipe switch cylinders 21, 21 ', which can be tapped via the hydraulic lines 26, 26' and / or via electrical signal transmitters y.
  • the auxiliary pump 25 also charges the closed main circuit via the check valves 75, 75 'and is secured by the pressure-limiting valve 74.
  • the circuit arrangement shown leads to a sequence control of the drive cylinders 5, 5 'and the tube switch cylinders 21, 21', which functions as follows:
  • a reversal of the directional control valve 31 is triggered via the electrically tapped end position signal x.
  • Characterized the Umsteu ⁇ is' operation on the diverter cylinders 21,21 'reversed erventil 30 under triggering of a reversing change, wherein the conveying direction of the reversible pump 6 remains keep initially er ⁇ and the drive pistons 8,8' via the Pressure oil in line 11 are kept in their respective end positions.
  • the valve 20 is reversed via the corresponding position signal.
  • Characterized changes Vor ⁇ control on the adjusting cylinder 18 so that the swash plate 15 by pivots tung the reversible pump 6 under the Umledgeu ⁇ g 'Förderrich-.
  • the reversal signal is tapped in parallel between the valve 20 and the actuating cylinder 18 and switched to the pilot control of the valve 40 via the lines 28, 28 '.
  • the valve 40 thus changes its position and thus ensures that the tube switch cylinders 21, 21 'maintain the previously assumed end position despite the reversal of the direction of delivery of the reversing pump 6.
  • pilot valve 40 Since the pilot valve 40 responds to the reversing signal faster than the reversing pump 6, adjustable throttles 29, 29 'are arranged in the pilot lines 28, 28', which prevent undesired switching back of the pipe switch cylinders 21, 21 'in the course of the reversal of the conveying direction adapted to the time behavior of the reversing pump 6 cause the pilot valve 40 and thus the directional control valve 30 to slowly switch through.
  • the return valve 32 upstream of the reversing valve 20 in the control lines 26, 26 ', the drive cylinders 5, 5' can be acted upon in the opposite manner if necessary, so that material is conveyed back from the delivery line into the storage container.
  • the described circle arrangement is particularly suitable for smaller or slow-running systems which are dependent on the smallest possible number of hydraulic assemblies.
  • a two-circuit sequential circuit is suitable, in which the pipe switch reversing valve 30 is not connected to the main circuit via the lines 22, 22 ', but to a separate hydraulic circuit. In the latter case, the directional valve 40 can be omitted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Reciprocating Pumps (AREA)

Abstract

L'invention concerne une commande séquentielle destinée à une pompe à liquides épais comportant deux cylindres de refoulement (1, 1') débouchant, par l'intermédiaire d'ouvertures frontales (2, 2'), dans une trémie, et une dérivation (3) à commande hydraulique, qui est située à l'intérieur de la trémie et peut être reliée côté entrée en alternance à chacune des ouvertures (2, 2') des cylindres de refoulement (1, 1'), laissant libre l'autre ouverture, et qui peut être reliée côté sortie à une canalisation de refoulement (4). Les cylindres de refoulement (1, 1') sont reliés à des vérins hydrauliques de commande (5, 5') qui sont actionnés en mode push-pull par au moins une pompe réversible hydraulique (6). A la fin de chaque course de compression dans les cylindres de refoulement (1,l 1') est déclenché un processus d'inversion de la dérivation (3) pendant lequel est interrompu le refoulement des liquides épais. Pendant ce processus d'inversion, le sens de refoulement de la pompe réversible (6) est initialement maintenu inchangé, avec maintien d'une amenée libre de fluide hydraulique au vérin de commande (5, 5'), et ce n'est qu'à l'achèvement du processus d'inversion de la dérivation (3) que le sens de refoulement est inversé. Pour déclencher cette inversion du sens de marche, un signal hydraulique ou électrique de fin de course (y, y, 26, 26') est détecté au niveau de la dérivation (3) ou de ses organes hydrauliques de commande (21, 21') après chaque processus d'inversion.
EP89908162A 1988-12-05 1989-07-11 Procede et dispositif pour la commande d'une pompe a liquides epais a deux cylindres Expired - Lifetime EP0446206B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3840892A DE3840892A1 (de) 1988-12-05 1988-12-05 Verfahren und vorrichtung zur steuerung einer zweizylinder-dickstoffpumpe
DE3840892 1988-12-05

Publications (2)

Publication Number Publication Date
EP0446206A1 true EP0446206A1 (fr) 1991-09-18
EP0446206B1 EP0446206B1 (fr) 1993-06-16

Family

ID=6368470

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89908162A Expired - Lifetime EP0446206B1 (fr) 1988-12-05 1989-07-11 Procede et dispositif pour la commande d'une pompe a liquides epais a deux cylindres

Country Status (5)

Country Link
US (1) US5344290A (fr)
EP (1) EP0446206B1 (fr)
JP (1) JPH04501897A (fr)
DE (2) DE3840892A1 (fr)
WO (1) WO1990006444A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6929454B2 (en) 2000-07-24 2005-08-16 Putzmeister Aktiengesellschaft Thick matter pump
CN108146877A (zh) * 2017-12-15 2018-06-12 太仓佳锐精密模具有限公司 一种可限位的料筒下转进控制装置

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4141108A1 (de) * 1991-12-13 1993-06-17 Putzmeister Maschf Einrichtung zur regelung des ausgangsdruckes einer verstellpumpe
DE19542258A1 (de) * 1995-11-13 1997-05-15 Putzmeister Maschf Verfahren und Vorrichtung zur Steuerung einer Zweizylinder-Dickstoffpumpe
DE10150467A1 (de) * 2001-10-16 2003-04-17 Putzmeister Ag Dickstoffpumpe mit Fördermengenregelung
US7175394B2 (en) * 2001-12-21 2007-02-13 Weatherford/Lamb, Inc. Hydraulic multiphase pump
US6592334B1 (en) * 2001-12-21 2003-07-15 Weatherford/Lamb, Inc. Hydraulic multiphase pump
US6736376B1 (en) * 2002-03-19 2004-05-18 Delisle Gilles L. Anti-detonation fuel delivery system
DE102004015419A1 (de) * 2004-03-26 2005-10-13 Putzmeister Ag Vorrichtung und Verfahren zur Steuerung einer Dickstoffpumpe
WO2005121555A1 (fr) * 2004-06-07 2005-12-22 Hunter Hitech Pty Ltd Ensemble pompe
DE102005008217A1 (de) * 2005-02-22 2006-08-31 Putzmeister Ag Hydraulikantrieb, insbesondere für Zweizylinder-Dickstoffpumpen
IT1393038B1 (it) * 2009-02-09 2012-04-11 Imer Int Spa Pompa per clacestruzzo
DE102011083874A1 (de) * 2011-09-30 2013-04-04 Putzmeister Engineering Gmbh Hydrauliksystem mit Saug-Rücklauffilter
CN102979692B (zh) * 2012-05-22 2014-08-06 北汽福田汽车股份有限公司 串联油缸装置及其控制方法和泵送装置
CN103114983B (zh) * 2012-06-27 2014-01-01 中联重科股份有限公司 粘稠物料双缸泵的泵送行程控制方法及粘稠物料泵送设备
DE102018130480A1 (de) * 2018-11-30 2020-06-04 Liebherr-Betonpumpen Gmbh Zweizylinder-Dickstoffpumpe
EP4395977A1 (fr) 2021-09-03 2024-07-10 Readily3D SA Procédé de correction analytique numérique d'une réactivité de matériau photosensible dans la fabrication additive
WO2025223658A1 (fr) 2024-04-25 2025-10-30 Ecole Polytechnique Federale De Lausanne (Epfl) Système et procédé de fabrication additive volumétrique à haut débit et à haute résolution utilisant des hologrammes générés par ordinateur à multiplexage dans le temps

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US3327641A (en) * 1965-03-08 1967-06-27 Air Placement Equipment Co Inc Concrete pump
FR2040855A5 (fr) * 1969-04-23 1971-01-22 Richier Sa
US4036564A (en) * 1971-08-02 1977-07-19 Richards John A Concrete pumping apparatus
GB1452561A (en) * 1973-11-16 1976-10-13 Fogt Indmasch Apparatus for pumping wet concrete
IT1014858B (it) * 1974-06-07 1977-04-30 Ripamonti E Valvola distributrice a tre vie per pompe a due cilindri per cal cestruzzo
DE3243576A1 (de) * 1982-11-25 1984-05-30 Karl Dipl.-Ing. 7000 Stuttgart Schlecht Zweizylinder-kolbenpumpe, insbesondere fuer dickstoffe
JPS59206683A (ja) * 1983-05-09 1984-11-22 Mitsubishi Heavy Ind Ltd コンクリ−トポンプ
DE3346820A1 (de) * 1983-12-23 1985-07-04 Linde Ag, 6200 Wiesbaden Hydrostatischer antrieb fuer eine betonkolbenpumpe

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Title
See references of WO9006444A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6929454B2 (en) 2000-07-24 2005-08-16 Putzmeister Aktiengesellschaft Thick matter pump
CN108146877A (zh) * 2017-12-15 2018-06-12 太仓佳锐精密模具有限公司 一种可限位的料筒下转进控制装置

Also Published As

Publication number Publication date
US5344290A (en) 1994-09-06
JPH04501897A (ja) 1992-04-02
DE3840892A1 (de) 1990-06-07
EP0446206B1 (fr) 1993-06-16
WO1990006444A1 (fr) 1990-06-14
DE58904753D1 (de) 1993-07-22

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