EP0669462A1 - Procédé de réglage de l'amplitude de la pulsation et pompe à béton - Google Patents

Procédé de réglage de l'amplitude de la pulsation et pompe à béton Download PDF

Info

Publication number
EP0669462A1
EP0669462A1 EP95101213A EP95101213A EP0669462A1 EP 0669462 A1 EP0669462 A1 EP 0669462A1 EP 95101213 A EP95101213 A EP 95101213A EP 95101213 A EP95101213 A EP 95101213A EP 0669462 A1 EP0669462 A1 EP 0669462A1
Authority
EP
European Patent Office
Prior art keywords
piston
pulsation
concrete
characteristic
section
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.)
Withdrawn
Application number
EP95101213A
Other languages
German (de)
English (en)
Inventor
Rolf Widmer
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.)
Sika Equipment AG
Original Assignee
Aliva AG
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 Aliva AG filed Critical Aliva AG
Priority to EP95101213A priority Critical patent/EP0669462A1/fr
Publication of EP0669462A1 publication Critical patent/EP0669462A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B15/00Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/02Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
    • F04B15/023Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous supply of fluid to the pump by gravity through a hopper, e.g. without intake valve
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B11/00Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F04B11/005Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons
    • F04B11/0058Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons with piston speed control
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00Fluid parameters
    • F04B2205/05Pressure after the pump outlet
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00Fluid parameters
    • F04B2205/13Pressure pulsations after the pump

Definitions

  • the present invention relates to a method according to the preamble of claim 1 and a concrete pump according to that of claim 7.
  • a typical piston concrete pump of known type is shown schematically and in supervision. It comprises at least two piston / cylinder arrangements 1A and 1B, which are usually driven in opposite phases by means of a hydraulic drive unit 3, typically each by means of a hydraulic piston / cylinder arrangement.
  • the piston / cylinder arrangements 1A and 1 B act in a concrete tank 5 on the one hand and on the other hand in an S-shaped connecting pipe 7, the outlet of which is connected to a line arrangement 9, typically to a concrete spray nozzle 11.
  • the S-shaped connecting pipe 7 oscillates, driven (not shown), about the axis A of the line system connection, in such a way that the piston / cylinder arrangement-side opening of the S-shaped connecting line 7 is sequentially sealingly connected to the piston / cylinder arrangements 1A, 1B.
  • the piston / cylinder not connected to the S-shaped connecting pipe 7, which, as shown by arrow w 7, swings around axis A, sucks concrete out of the concrete tank 5, while the other piston / cylinder is connected via the connecting pipe 7 acts in the pipe system 9.
  • the aim of the present invention is to set the pulsations on a given section of the line system, in particular at the spray nozzle, to a predefinable level, in particular to make them at least almost disappear.
  • the present invention solves the problem mentioned in that the pulsation at the selected section, in particular at the spray nozzle 11, is observed and the characteristic of the ejection movement of the pistons on the piston / cylinder arrangements 1A, 1B changes for so long until the pulsation reaches the desired level has reached. Except for exceptional situations in which a targeted pulsating ejection may be desired, the desired degree of disappearance of the pulsation mentioned is preferred.
  • the invention is therefore based on the knowledge that the pulsations mentioned are critical and sensitive to the movement characteristics of the pistons mentioned in the ejection cycle, i.e. 1 in the movement against the line system 9, depend and that this characteristic can be adjusted and changed.
  • the phenomenon to be controlled namely the pulsations, is observed as a result of all the parameters mentioned, and with a controllable quantity, namely the characteristic of the ejection movement mentioned, the pulsation is set to the desired level mentioned, all the disturbance variables mentioned and their influence on the Pulsations compensated.
  • FIG. 2 Starting from a concrete pump of the type shown schematically in FIG. 1, the invention is shown in FIG. 2 on the basis of a function block / signal flow diagram in two basic design variants. The same reference numerals are used as in FIG. 1.
  • the drive unit 3 has a control input E3 for controlling the movement characteristic of the pistons of the piston / cylinder arrangements 1A, 1B, during their feed cycle or ejection cycle.
  • the speed characteristic can be changed in a controlled manner during this feed movement, as shown schematically with the specification unit 13 from FIG. 2, by means of which the mentioned characteristic v (t) can be adjusted. This is done manually, i.e.
  • the specification unit 13 for the drive 3 acts as an actuator in a control circuit, in which, in the section of the line system 9 of interest, in particular in the area of the spray nozzle 11, such as with the detector 17, the ejection pulsation amplitude is detected, the output signal of the detector 17 is compared at a comparison unit 19 with a target value for the pulsation amplitude that can be predetermined on the specification unit 21, and the comparison result as control difference Ap intervenes on the unit 13 for the movement characteristics of the pistons .
  • the pulsation amplitude except for the permanent control difference, is brought up to the TARGET value which can be predetermined on the specification unit 21 and which in most cases is chosen to be zero.
  • a first time period preferably at the beginning of the feed cycle, is defined within the feed cycle, corresponding to the time period T, which is shown in FIG. 3a with T 1 is designated.
  • T -Ti the remaining time period T -Ti, as shown schematically, the pistons are propelled at a predetermined fixed speed v o .
  • the pulsations mentioned can be set in a stationary manner over a long period of time and very precisely to predetermined values, in particular made to disappear.
  • FIG. 4 in the form of a signal flow / functional block diagram shows a preferred embodiment of a concrete pump according to the invention, which works according to the method according to the invention. Only one piston 1A of the pump of the type shown in FIG. 1 is shown.
  • a clock unit 20 emits a rectangular pulse train with a repetition frequency corresponding to the piston actuation frequency.
  • the pistons are propelled in the "L" half-periods and retrieved in the "H" half-periods.
  • a timer unit 21 is set, which outputs an output pulse of the time period T 1 which can be set at an input E.
  • the drive 3 as shown schematically with the changeover switch Q 1 , is driven with the speed control signal v 1 according to FIG. 3, while in the remaining time period T -T i of the ejection cycle "before" the drive 3 is driven via the switching unit Q 1 with the feed speed v 0 .
  • the time period T 1 is set either with the manual input device 15 according to FIG. 2, as with a potentiometer or a keyboard, and / or, as has been explained, at the area of interest of the line system 9 that is of interest, as in particular in the area of the spray nozzle 11, the pulsation, shown schematically in FIG. 4 at P, is detected with the detector 11, as was explained with reference to FIG. 2, compared with the adjustable desired value signal at the comparison unit 19, and it is set the time period T 1 with the difference signal until the pulsations P are adjusted to a predetermined value or, and preferably, are adjusted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
EP95101213A 1995-01-30 1995-01-30 Procédé de réglage de l'amplitude de la pulsation et pompe à béton Withdrawn EP0669462A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP95101213A EP0669462A1 (fr) 1995-01-30 1995-01-30 Procédé de réglage de l'amplitude de la pulsation et pompe à béton

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP95101213A EP0669462A1 (fr) 1995-01-30 1995-01-30 Procédé de réglage de l'amplitude de la pulsation et pompe à béton

Publications (1)

Publication Number Publication Date
EP0669462A1 true EP0669462A1 (fr) 1995-08-30

Family

ID=8218942

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95101213A Withdrawn EP0669462A1 (fr) 1995-01-30 1995-01-30 Procédé de réglage de l'amplitude de la pulsation et pompe à béton

Country Status (1)

Country Link
EP (1) EP0669462A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0838589A2 (fr) 1998-01-06 1998-04-29 Sika Equipment AG Méthode pour la compensation automatique de fuites de fluide hydraulique, circuit de compensation de fuites et dispositif à double piston comportant un tel circuit
DE10004779A1 (de) * 2000-02-03 2001-08-09 Putzmeister Ag Dickstoffförderer mit Verteilermast sowie Verfahren zum pulsierenden Pumpen von Dickstoffen
WO2002079596A1 (fr) * 2001-04-02 2002-10-10 Putzmeister Aktiengesellschaft Dispositif d'actionnement d'un mat articule destine notamment a des pompes a beton
NL1034431C2 (nl) * 2007-09-27 2009-03-30 Staring Beheer B V M Slurriepomp.
DE112011101269B4 (de) * 2010-04-07 2021-05-06 Weir Minerals Netherlands B.V. Phasenverschiebungssteuerung für ein oszilierendes Pumpensystem

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3243738A1 (de) * 1982-11-26 1984-05-30 Karl Dipl.-Ing. 7000 Stuttgart Schlecht Hydro-umsteuerung bei zweizylinder-kolbenpumpe
GB2170869A (en) * 1985-02-12 1986-08-13 Willett Thomas & Co Ltd Pumping systems
GB2249591A (en) * 1990-10-01 1992-05-13 Pressure Pointing Ltd Mortar dispensing apparatus
US5332366A (en) * 1993-01-22 1994-07-26 Schwing America, Inc. Concrete pump monitoring system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3243738A1 (de) * 1982-11-26 1984-05-30 Karl Dipl.-Ing. 7000 Stuttgart Schlecht Hydro-umsteuerung bei zweizylinder-kolbenpumpe
GB2170869A (en) * 1985-02-12 1986-08-13 Willett Thomas & Co Ltd Pumping systems
GB2249591A (en) * 1990-10-01 1992-05-13 Pressure Pointing Ltd Mortar dispensing apparatus
US5332366A (en) * 1993-01-22 1994-07-26 Schwing America, Inc. Concrete pump monitoring system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0838589A2 (fr) 1998-01-06 1998-04-29 Sika Equipment AG Méthode pour la compensation automatique de fuites de fluide hydraulique, circuit de compensation de fuites et dispositif à double piston comportant un tel circuit
DE10004779A1 (de) * 2000-02-03 2001-08-09 Putzmeister Ag Dickstoffförderer mit Verteilermast sowie Verfahren zum pulsierenden Pumpen von Dickstoffen
WO2002079596A1 (fr) * 2001-04-02 2002-10-10 Putzmeister Aktiengesellschaft Dispositif d'actionnement d'un mat articule destine notamment a des pompes a beton
NL1034431C2 (nl) * 2007-09-27 2009-03-30 Staring Beheer B V M Slurriepomp.
DE112011101269B4 (de) * 2010-04-07 2021-05-06 Weir Minerals Netherlands B.V. Phasenverschiebungssteuerung für ein oszilierendes Pumpensystem

Similar Documents

Publication Publication Date Title
DE10256923B4 (de) Verfahren und Vorrichtung zur Bewegungsdämpfung von Hydraulikzylindern mobiler Arbeitsmaschinen
EP0077908B1 (fr) Dispositif pour refouler du liquide contre haute pression
WO2005093252A1 (fr) Dispositif et procede de commande d'une pompe a pates a deux cylindres
WO2005093251A1 (fr) Dispositif et procede de commande d'une pompe a pates
EP0409001B1 (fr) Dispositif d'injection de liquides
DE3246754A1 (de) Eichverfahren und eichanordnung fuer eine fluidzerstaeubervorrichtung mit durchsatzregelung
DE4206576B4 (de) Verfahren und Anordnung zur Bestimmung der Fördermenge oder des Förderstroms von mittels einer Kolbendickstoffpumpe transportiertem Fördergut
DE2743409A1 (de) Nach dem echoprinzip arbeitender ultraschall-fuellstandgrenzschalter
EP0669462A1 (fr) Procédé de réglage de l'amplitude de la pulsation et pompe à béton
EP0108239B1 (fr) Dispositif pour mesurer des quantités injectées
DE3240622C3 (de) Verfahren zum Messen einer aus einer Brennstoff-Einspritzvorrichtung austretendde Brennstoffmenge und Verwendung einer Vorrichtung, zum Messen einer von der Brennstoff-Einspritzvorrichtung während eines einzelnen Einspritzvorganges abgegebenen Brennstoffmenge
DE10324076A1 (de) Fördereinrichtung für eine Lackieranlage
CH619777A5 (fr)
EP0482579B1 (fr) Procédé et dispositif pour proportioner en particulier un mélange très visqueux comportant un ou plusieurs componants
DE3103942A1 (de) Verstopferanzeige und automatische loeseeinrichtung eines verstopfers insbesondere bei betonpumpen
DE10322404B4 (de) Dosierpumpe und Verfahren zu deren Steuerung
DE3327590A1 (de) Vorrichtung zur regelung des druckes am ende einer abfuelleitung
DE3916418C2 (fr)
EP0567826A2 (fr) Pompe à corps solides
DE2135818C2 (de) Vorrichtung für eine kontinuierliche Flüssig-Flüssig-Extraktion
DE3818760C2 (fr)
DE3250126C2 (de) Verfahren und Vorrichtung zum Messen einer von einer Brennstoff-Einspritzvorrichtung abgegebenen Brennstoffmenge
EP0779135A1 (fr) Procédé de réglage de la quantité de projetée d'un mélange de matériaux de construction pulvérisable et installation de pulvérisation pour constructions
DE102020116071A1 (de) Verfahren zum Steuern eines mit einer Dosierpumpe förderbaren Volumens
DE102006016950B4 (de) Lackiereinrichtung und Verfahren zum Ausbringen von Lack

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT CH DE ES FR GB GR IT LI PT SE

17P Request for examination filed

Effective date: 19950717

RBV Designated contracting states (corrected)

Designated state(s): AT CH DE ES FR GB GR IT LI PT SE

17Q First examination report despatched

Effective date: 19980414

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SIKA EQUIPMENT AG

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19981027