EP1122380B1 - Dickstoffförderer mit Verteilermast sowie Verfahren zum pulsierenden Pumpen von Dickstoffen - Google Patents
Dickstoffförderer mit Verteilermast sowie Verfahren zum pulsierenden Pumpen von Dickstoffen Download PDFInfo
- Publication number
- EP1122380B1 EP1122380B1 EP01102009A EP01102009A EP1122380B1 EP 1122380 B1 EP1122380 B1 EP 1122380B1 EP 01102009 A EP01102009 A EP 01102009A EP 01102009 A EP01102009 A EP 01102009A EP 1122380 B1 EP1122380 B1 EP 1122380B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- frequency
- pump frequency
- thick matter
- boom
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/04—Devices for both conveying and distributing
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/04—Devices for both conveying and distributing
- E04G21/0418—Devices for both conveying and distributing with distribution hose
- E04G21/0436—Devices for both conveying and distributing with distribution hose on a mobile support, e.g. truck
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/04—Devices for both conveying and distributing
- E04G21/0418—Devices for both conveying and distributing with distribution hose
- E04G21/0445—Devices for both conveying and distributing with distribution hose with booms
- E04G21/0454—Devices for both conveying and distributing with distribution hose with booms with boom vibration damper mechanisms
-
- 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
Definitions
- the invention relates to a thick matter conveyor with a pulsating Thick matter pump, with one connected to the thick matter pump on the output side Delivery line, with one serving as a carrier for the delivery line Distribution boom, with a control device for setting a target pump frequency according to a given delivery rate per time interval and with means for damping those forced during the pumping process mechanical vibrations in the placing boom.
- the invention further relates to a method for pulsating pumping of thick matter, in particular Concrete, through a on a mechanically vibrating placing boom arranged delivery line, in which a target pump frequency in accordance with a predetermined delivery rate is set per time interval and in which the mechanical forces forced in the placing boom during the pumping process Vibrations are damped.
- Thick matter conveyors of this type designed as concrete pumps are known (DE-A-19503895), in which the necessary to start the concreting site Mast movements from a mast leader e.g. with a radio remote control can be controlled "by hand" while an assistant to the mast leader (Hose man) guides the end hose over the intended concreting point.
- the placing boom arranged on a substructure is its construction according to an elastic system capable of vibrating, which leads to natural vibrations is stimulable. A resonant excitation of such vibrations can do this cause the free end of the distribution boom with amplitudes of one Meters and more swings. Vibration excitation is e.g.
- the invention is based on the object of developing a thick matter conveyor with a vibrating placing boom and a method for its operation, with which effective vibration damping is possible without any sensors using simple means.
- the solution according to the invention is based on the knowledge that in a system capable of oscillation which is excited to oscillate by periodic external forces, it occurs with a frequency variation of the external forces especially when passing through the natural frequency of the system to phase shifts comes to a vibration damping on the interference principle to lead.
- the invention proposes that the control device forms the damping means Control circuit or programmed control instruction for periodic variation or modulation of the pump frequency with respect to the target pump frequency while maintaining the specified delivery rate per time interval.
- the modulation cycle can be programmed from a File can be retrieved digitally.
- the pump frequency compared to the target pump frequency while maintaining the specified delivery rate per time interval periodically varied or modulated. It is an advantage if the Pump frequency gradually increased periodically compared to the target pump frequency and is lowered. The easiest way is that the pumping frequency between two corner frequencies in given modulation cycles is switched back and forth, with a corner frequency higher and the other cut-off frequency is lower than that for the set delivery rate belonging target pump frequency is. Alternatively, between the target pump frequency as well as a higher and a lower base frequency in predetermined modulation cycles to and fro. Every modulation level are advantageously at least two, preferably four to ten Pump strokes assigned the same stroke duration. Experience has shown that a sufficient vibration damping is achieved when the corner frequencies around deviate by up to ⁇ 10% from the target pump frequency.
- the Natural frequencies of different mast configurations measured and in digital available files. Because damping measures only nearby the natural frequencies of the oscillatory system are necessary, it is proposed according to the invention that the pump frequency only then is varied or modulated when the target pump frequency is less than one predetermined difference, preferably by less than 30% of the natural frequency deviates from the set mast configuration. To the interference effect To be able to fully exploit the damping process is from Advantage if the upper and lower corner frequencies of the modulated pump frequency lie above or below the natural frequency of the placing boom.
- Another advantageous embodiment of the invention provides that in the Switching phase between two pump frequencies, one waiting time each which is suitably less than the duration of a pump stroke.
- the truck-mounted concrete pump 10 comprises a transport vehicle 11, e.g. as Two-cylinder piston pump designed pulsating thick matter pump 12 and a boom 14 rotatable about a vehicle-mounted vertical axis 13 as a support for a concrete delivery line 16.
- a transport vehicle 11 e.g. as Two-cylinder piston pump designed pulsating thick matter pump 12
- a boom 14 rotatable about a vehicle-mounted vertical axis 13 as a support for a concrete delivery line 16.
- Liquid concrete which is in a hopper 17 during concreting is continuously introduced to one of the location of the vehicle 11 remotely located pouring 18 promoted.
- the placing boom 14 consists of a mast bracket 21 which can be rotated about the vertical axis 13 by means of a hydraulic rotary drive 19 and an articulated boom 22 which can be pivoted thereon and which can be continuously adjusted to the variable range and height difference between the vehicle 11 and the concreting site 18.
- the articulated boom 22 consists of five articulated mast arms 23 to 27 which can be pivoted about axes 28 to 32 running parallel to one another and at right angles to the vertical axis 13 of the mast bracket 21.
- the articulation angle ranges ⁇ 1 to ⁇ 5 (FIG.
- the mast leader controls e.g. the mast movements by means of a radio remote control 50, through which the mast tip with the end hose 43 to the concrete area is led away.
- the end hose 43 has one typical length of 3 to 4 m and can because of its articulated suspension in the area of the mast tip and due to its inherent flexibility with its Exit end of a hose man in the most favorable position for Concreting 18 are held.
- the thick matter pump is controlled via the remote control 50, which is set by the mast operator for a concrete delivery rate and as a default signal transmitted by radio to a microcontroller 52 of the pump control becomes.
- the specified target delivery rate is converted into a
- the target pump frequency is converted and with the current pump frequency below Formed a comparison signal compared.
- the comparison signal is from Microcontroller passed on to a flow controller 54, in which a quantity valve or a swivel plate of the feed pump 56 after In accordance with the predetermined target pump frequency is adjusted.
- Given Oil flow rate represents the stroke time and thus the pumping frequency for the hydraulic drive cylinder 57 of the thick matter pump automatically on.
- the placing boom 14 adjusts together with the transport vehicle 11 Vibration-capable system that operates in the pulsating mode Thick matter pump 12 can be excited to forced vibrations.
- the Vibrations can cause the mast tip to deflect hanging end hose 43 lead, with amplitudes around 1 m and frequencies between 0.5 and a few Hz.
- the microcontroller 52 contains the microcontroller 52 also has a damping device 58, the one Frequency generator or an algorithm for periodic variation of the pump frequency compared to the target pump frequency.
- the damping device 58 additionally contains a machine-dependent parameter set for generation the optimal frequency variation.
- the pump frequency is varied so that alternately an increase and a decrease compared to the Desired pump frequency occurs, in such a way that on average the remote control 50 specified concrete flow rate is maintained.
- About the Damping device 58 becomes the output signal of microcontroller 52 modified so that a variable oil flow rate via the flow rate controller 54 is set, which leads to a variation of the pump frequency in the drive cylinders 57 of the thick matter pump 12 leads.
- the frequency variation is dimensioned so that the vibrations in the placing boom 14 due of an interference effect can be largely eliminated.
- the invention relates to a thick matter conveyor with a pulsating thick matter pump 12.
- the thick matter pump is connected on the output side to a delivery line 16, which are guided over an elastically vibrating placing boom 14 is.
- the pumping frequency compared to the target pumping frequency while maintaining the predetermined concrete delivery rate periodically varied or modulated per time interval.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Description
- Fig. 1
- eine Seitenansicht einer Autobetonpumpe mit zusammengelegtem Verteilermast;
- Fig. 2
- die Autobetonpumpe nach Fig. 1 mit Verteilermast in Arbeitsstellung;
- Fig. 3
- ein Blockschaltbild einer Steuereinrichtung zur Ansteuerung einer pulsierend arbeitenden Dickstoffpumpe über eine Fernbedienung.
Claims (13)
- Dickstoffförderer mit einer pulsierend arbeitenden Dickstoffpumpe (12), mit einer ausgangsseitig an die Dickstoffpumpe angeschlossenen Förderleitung (16), mit einem als Träger für die Förderleitung (16) dienenden Verteilermast (14), mit einer Steuereinrichtung (50 bis 56) zur Einstellung einer Sollpumpfrequenz nach Maßgabe einer vorgegebenen Fördermenge pro Zeitintervall und mit Mitteln (58) zur Dämpfung von beim Pumpvorgang erzwungenen mechanischen Schwingungen im Verteilermast (14), dadurch gekennzeichnet, daß die Steuereinrichtung eine die Dämpfungsmittel (58) bildende Steuerschaltung oder programmierte Steueranweisung zur automatischen periodischen Variation oder Modulation der Pumpfrequenz gegenüber der Sollpumpfrequenz unter Beibehaltung der vorgegebenen Fördermenge pro Zeitintervall aufweist.
- Dickstoffförderer nach Anspruch 1, bei welchem die vorzugsweise als Kolbenpumpe ausgebildete Dickstoffpumpe (12) unmittelbar oder mittelbar über einen Hydrozylinder (57) durch eine Hydropumpe (56) antreibbar ist, dadurch gekennzeichnet, daß die Pumpfrequenz durch Variation der Förderleistung der Hydropumpe (56) einstellbar ist.
- Dickstoffpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Modulationszyklus über die programmierte Steueranweisung aus einem Speicher digital abrufbar ist.
- Verfahren zum pulsierenden Pumpen von Dickstoffen, insbesondere von Beton, durch eine auf einem mechanisch schwingungsfähigen Verteilermast (14) angeordnete Förderleitung (16), bei welchem eine Sollpumpfrequenz nach Maßgabe einer vorgebbaren Fördermenge pro Zeitintervall eingestellt wird und bei welchem die im Verteilermast (14) beim Pumpvorgang erzwungenen mechanischen Schwingungen gedämpft werden, dadurch gekennzeichnet, daß zur Dämpfung der im Verteilermast beim Pumpvorgang erzwungenen Schwingungen die Pumpfrequenz unter Beibehaltung der vorgegebenen Fördermenge pro Zeitintervall periodisch gegenüber der Sollpumpfrequenz variiert oder moduliert wird.
- Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die Pumpfrequenz schrittweise periodisch gegenüber der Sollpumpfrequenz angehoben und abgesenkt wird.
- Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß die Pumpfrequenz zwischen zwei Eckfrequenzen in vorgegebenen Modulationszyklen hin- und hergeschaltet wird, wobei die eine Eckfrequenz höher und die andere Eckfrequenz niedriger als die Sollpumpfrequenz ist.
- Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß zwischen der Sollpumpfrequenz sowie einer höheren und einer niedrigeren Eckfrequenz in vorgegebenen Modulationszyklen hin- und hergeschaltet wird.
- Verfahren nach einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, daß jedem Modulationsschritt mindestens zwei, vorzugsweise vier bis zehn Pumpenhübe gleicher Hubdauer zugeordnet sind.
- Verfahren nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, daß die Eckfrequenzen um bis zu ± 10 % von der Sollpumpfrequenz abweichen.
- Verfahren nach einem der Ansprüche 4 bis 9, dadurch gekennzeichnet, daß die Eigenfrequenzen verschiedener Mastkonfigurationen gemessen und in digital abrufbaren Dateien hinterlegt werden.
- Verfahren nach Anspruch 10, dadurch gekennzeichnet, daß die Pumpfrequenz nur dann variiert oder moduliert wird, wenn die Sollpumpfrequenz um weniger als ein vorgegebener Differenzbetrag, vorzugsweise um weniger als 30 % von der Eigenfrequenz der eingestellten Mastkonfiguration abweicht.
- Verfahren nach einem der Ansprüche 4 bis 11, dadurch gekennzeichnet, daß in einer Umschaltphase zwischen zwei Pumpfrequenzen eine Wartezeit eingehalten wird, die zweckmäßig kleiner als die Dauer eines Pumpenhubs ist.
- Verfahren nach einem der Ansprüche 10 bis 12, dadurch gekennzeichnet, daß die oberen und unteren Eckfrequenzen der modulierten Pumpfrequenz oberhalb und unterhalb der Eigenfrequenz des Verteilermasts liegen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10004779A DE10004779A1 (de) | 2000-02-03 | 2000-02-03 | Dickstoffförderer mit Verteilermast sowie Verfahren zum pulsierenden Pumpen von Dickstoffen |
DE10004779 | 2000-02-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1122380A1 EP1122380A1 (de) | 2001-08-08 |
EP1122380B1 true EP1122380B1 (de) | 2003-11-19 |
Family
ID=7629733
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01102009A Expired - Lifetime EP1122380B1 (de) | 2000-02-03 | 2001-01-30 | Dickstoffförderer mit Verteilermast sowie Verfahren zum pulsierenden Pumpen von Dickstoffen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1122380B1 (de) |
DE (2) | DE10004779A1 (de) |
ES (1) | ES2210043T3 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2012147256A (ru) * | 2010-04-07 | 2014-05-27 | Вейр Минералз Незерландс Б.В. | Контроллер сдвига фазы для системы поршневых насосов |
CN104790670B (zh) * | 2015-04-08 | 2017-04-26 | 深圳市富斯遥控模型技术有限公司 | 一种基于远程遥控控制的自动水泥浇灌系统 |
DE102018109098A1 (de) | 2018-04-17 | 2019-10-17 | Liebherr-Mischtechnik Gmbh | Betonpumpe |
DE102018109057A1 (de) | 2018-04-17 | 2019-10-17 | Liebherr-Mischtechnik Gmbh | Betonpumpe |
DE102018109088A1 (de) | 2018-04-17 | 2019-10-17 | Liebherr-Mischtechnik Gmbh | Großmanipulator, insbesondere für Betonpumpen |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1038401B (de) * | 1954-10-29 | 1958-09-04 | W & W Schenk K G Leichtgusswer | Einrichtung fuer elektrohydraulische Umsteuerung von druckmittelgetriebenen Kolbenpumpen, insbesondere fuer die Foerderung plastischer Massen |
GB1306137A (de) * | 1970-05-12 | 1973-02-07 | ||
DE4215403C2 (de) * | 1991-05-16 | 2000-10-19 | Mbt Holding Ag Zuerich | Doppelkolbenpumpe zum Fördern von flüssigen Materialien, insbesondere von Beton oder Mörtel |
EP0669462A1 (de) * | 1995-01-30 | 1995-08-30 | Aliva Aktiengesellschaft | Verfahren zur Einstellung der Pulsationsamplitude und Betonpumpe |
DE19503895A1 (de) | 1995-02-07 | 1996-08-08 | Putzmeister Maschf | Betonpumpe mit Verteilermast |
JP4120905B2 (ja) * | 1999-03-31 | 2008-07-16 | 石川島建機株式会社 | ブーム付コンクリートポンプ車の運転制御装置 |
-
2000
- 2000-02-03 DE DE10004779A patent/DE10004779A1/de not_active Withdrawn
-
2001
- 2001-01-30 ES ES01102009T patent/ES2210043T3/es not_active Expired - Lifetime
- 2001-01-30 EP EP01102009A patent/EP1122380B1/de not_active Expired - Lifetime
- 2001-01-30 DE DE50100978T patent/DE50100978D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE50100978D1 (de) | 2003-12-24 |
ES2210043T3 (es) | 2004-07-01 |
EP1122380A1 (de) | 2001-08-08 |
DE10004779A1 (de) | 2001-08-09 |
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