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 PDFInfo
- 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- Withdrawn
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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
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
- F04B15/023—Pumps 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
-
- 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
- F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
- F04B11/005—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons
- F04B11/0058—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons with piston speed control
-
- 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
- F04B2205/00—Fluid parameters
- F04B2205/05—Pressure after the pump outlet
-
- 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
- F04B2205/00—Fluid parameters
- F04B2205/13—Pressure 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)
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)
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)
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 |
-
1995
- 1995-01-30 EP EP95101213A patent/EP0669462A1/fr not_active Withdrawn
Patent Citations (4)
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)
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 |
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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 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT CH DE ES FR GB GR IT LI PT SE |
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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 |
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18D | Application deemed to be withdrawn |
Effective date: 19981027 |