EP1727980B1 - Vorrichtung und verfahren zur steuerung einer zweizylinder-dickstoffpumpe - Google Patents

Vorrichtung und verfahren zur steuerung einer zweizylinder-dickstoffpumpe Download PDF

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Publication number
EP1727980B1
EP1727980B1 EP05716191A EP05716191A EP1727980B1 EP 1727980 B1 EP1727980 B1 EP 1727980B1 EP 05716191 A EP05716191 A EP 05716191A EP 05716191 A EP05716191 A EP 05716191A EP 1727980 B1 EP1727980 B1 EP 1727980B1
Authority
EP
European Patent Office
Prior art keywords
stroke
pump
reversing
reversible pump
pressure
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.)
Active
Application number
EP05716191A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1727980A1 (de
Inventor
Stefan Höfling
Wilhelm Hofmann
Wolf-Michael Petzold
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 Concrete Pumps 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 Concrete Pumps GmbH filed Critical Putzmeister Concrete Pumps GmbH
Priority to EP07119583A priority Critical patent/EP1906012B1/de
Publication of EP1727980A1 publication Critical patent/EP1727980A1/de
Application granted granted Critical
Publication of EP1727980B1 publication Critical patent/EP1727980B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • 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
    • 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
    • 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
    • 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
    • F04B7/0241—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 oscillating movement
    • 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
    • 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
    • F04B2201/02—Piston parameters
    • F04B2201/0201—Position of the piston
    • 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
    • F04B2203/00—Motor parameters
    • F04B2203/09—Motor parameters of linear hydraulic motors
    • F04B2203/0903—Position of the driving piston
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps
    • Y10S417/90—Slurry pumps, e.g. concrete

Definitions

  • the invention relates to an apparatus and a method for controlling a two-cylinder slurry pump with two opening on the front side openings in a material feed container, by means of at least one hydraulic reversing and controlled by these hydraulic drive cylinder push-pull delivery cylinders, arranged with an arranged within the material feed container, the inlet side alternately connect the openings of the delivery cylinder and the other opening releasing and outlet side connected to a delivery line, hydraulically actuated diverter, each at the end of a delivery stroke a Um tenuvorgang the diverter is triggered, further wherein the drive cylinder at one end to form a closed hydraulic circuit with each a connection of the reversing pump and at its other end via a swing oil pipe are hydraulically connected to each other and wherein to Umsteue tion of the diverter oil pressure oil is diverted from the leading from the reversing pump to the drive cylinders hydraulic lines.
  • the present invention seeks to develop a device and a method, which even without the usual today cylinder switch sensors reliable pump operation can be ensured with continuous concrete flow.
  • the solution according to the invention is based above all on the knowledge that, with the inclusion of a computer control, additional operating data can be evaluated from the hydraulic circuit for controlling the reversing pump and the pipe switch.
  • the solution according to the invention consists essentially in that the reversing device has a computer-aided arrangement for determining the anticipated stroke duration and its registration in a data memory and for monitoring the time during each piston stroke and for initiating a diverter pipe reversal and reverse flow of the reversing pump in accordance with a defined, compared to estimated lift time has elapsed stroke time.
  • the reversing device preferably has a time monitoring routine which has an algorithm for determining a comparison value from the stroke time and the anticipated stroke duration and for converting it when a predetermined value in a reversing signal for the diverter switch and / or the reversing pump is exceeded.
  • an advantageous embodiment of the invention provides that the reversing device has an input routine for storing the measured during a calibration of the concrete pump at least one defined flow rate stroke duration. Since the flow rate can be varied in computer-aided concrete pumps, for example via a remote control device, it is particularly advantageous if the reversing device a calculation routine for converting the registered stroke duration in dependence on the set on a remote control unit flow.
  • a sensor for monitoring the hydraulic pressure on the high-pressure side of the reversing pump is provided, the output signal of which can be evaluated with a pressure monitoring routine of the reversing device for triggering a diverter pipe reversal and reverse flow of the reversing pump.
  • a mean pump pressure can be determined and stored during each pressure stroke.
  • the pressure monitoring routine then has an algorithm for determining a pressure increase occurring at the end of each pressure stroke in the respective drive cylinder relative to the mean pressure value and for converting it into a changeover signal for the transfer tube and / or the reversing pump.
  • the reversing device may also have a responsive to the output signals Zylinderschaltsensoren Weg Weg jointlynrachungsroutine for triggering the Rohr originallyum penetrateung and / or reverse flow of the reversing pump.
  • the reversing device may additionally have a measuring routine for determining the duration of stroke from the output signals of the cylinder switching sensors and for their registration. The stroke duration registered in a data memory in this way can be used in an emergency to control the flow reversal.
  • a preferred embodiment of the invention provides that the path monitoring routine responsive to selected cylinder switching sensors, the pressure monitoring routine responding to the pressure measurement values, and the time monitoring routine responding to the stroke time are preferably form hierarchically structured, redundant program sequence for reversing the pipe switch and / or the reversing pump.
  • the control according to the invention switches over the reversing pump when the bottom-side cylinder switch is reached during normal operation and thus ensures a continuous flow of concrete.
  • the respective stroke duration is calculated during operation and the mean high pressure at the pressure output of the reversing pump is determined and stored in data memories.
  • the controller for the continued operation of the pump can be automatically switched to at least one of the bottom-side Zylinderschaltsensoren.
  • the rod-side cylinder shift sensors are indeed prioritized. In operation, however, the rod and the bottom side cylinder switching sensors are monitored and can be activated independently of each other for the aforementioned measuring operations.
  • the stroke time since the last switching operation can be monitored and compared with the registered stroke duration.
  • the estimated stroke time can be calculated as a function of the flow rate, the speed or the viscosity of the conveyed material. If the stroke time has almost expired, the high pressure at the pump outlet is compared with the average stored high pressure of the current stroke. In the case of an increase in the pressure above a predetermined threshold, a forced reversal can be initiated in this case.
  • the measures described above can also be used individually for reversing the diverter valve and the reversing pump.
  • control arrangement is corresponding to a sludge pump Fig. 1 determined
  • the two delivery cylinder 50, 50 ', the front-side openings 52 open into a material feed container 54 and alternately during the pressure stroke via a diverter 56 with a delivery line 58 are connectable.
  • the delivery cylinders 50, 50 ' are driven in a push-pull manner via hydraulic drive cylinders 5, 5' and a reversible hydraulic pump 6.
  • the delivery pistons 60, 60 'of the delivery cylinders 50, 50' are connected to the pistons 8, 8 'of the drive cylinders 5, 5' via a common piston rod 9, 9 '.
  • the drive cylinders 5, 5 ' are applied in the embodiment shown on the bottom side via the hydraulic lines 11, 11' of the hydraulic circuit by means of the reversing pump 6 with pressure oil and are at their rod-side end hydraulically connected to each other via a swing oil pipe 12.
  • the direction of movement of the drive pistons 8, 8 ', and thus the common piston rods 9, 9', is thereby reversed, that the direction of flow of the reversing pump 6 is reversed via a reversing device 18 containing a computer 14 and an adjusting mechanism 16.
  • the reversing pump 6 has for this purpose a swash plate 62, which is pivoted through the reversal by its zero position, so that the conveying direction of the pressure oil in the hydraulic lines 11, 11 'reverses.
  • the delivery rate of the reversing pump 6 can be varied by the swivel angle of the swash plate 62 at a predetermined speed of the drive motor, not shown.
  • the swivel angle of the swash plate 62 can be adjusted via a remote control device 64 with the assistance of the computer 14.
  • the reversal of the reversing pump 6 and the diverter 56 takes place as soon as the pistons 8, 8 'of the drive cylinders 5, 5' reach their end position.
  • the reversing device 18 has for this purpose a plurality of redundant control routines which are linked together to form a hierarchically structured program sequence (cf. Fig. 3 ).
  • the reversing device utilizes output signals of the cylinder-side sensors 20, 22 and 20 ', 22' arranged at a distance from the rod-side and bottom-side ends of the two drive cylinders 5, 5 ', which are connected on the output side to the computer-controlled reversing device 18.
  • the cylinder switch sensors respond to the drive piston 8, 8 'passing by during the pumping operation and signal this event to the computer input 66, 68.
  • a changeover signal 76 is triggered in the changeover device which reverses the reversing pump 6 via the adjusting mechanism 16.
  • Um vervorgangs also a reversal of the diverter 56 via the directional control valve and the plunger cylinder 72, 72 'is triggered.
  • the computer 14 has a path monitoring routine 40, in which the output signals of the rod-side cylinder shift sensors 20, 20 'are evaluated to form a reversing signal 76 for the reversing pump 6 and / or the pipe switch 56.
  • a path monitoring routine 40 in which the output signals of the rod-side cylinder shift sensors 20, 20 'are evaluated to form a reversing signal 76 for the reversing pump 6 and / or the pipe switch 56.
  • at least one of the rod-side cylinder shift sensors 20, 20 'fails at least one of the bottom-side cylinder shift sensors 22, 22' is activated in its place via the monitoring routine 40 to form the changeover signal 76.
  • the reversing device 18 further includes a pressure sensor 24 which is connected to the high-pressure side 78 of the reversing pump 6 and whose output signal is evaluated in the computer 14 by means of a pressure monitoring routine 80.
  • the pressure monitoring routine 80 calculates a medium high pressure in the course of a lifting operation and comprises an algorithm for determining a pressure increase occurring at the end of each delivery stroke and converting it into a reversing signal 76 'for the reversing pump 6 and / or the diverter 56.
  • This reversing signal is preferred a failure of the cylinder shift sensors 20, 20 '; 22, 22 'used for reversing.
  • a stroke duration dependent on the delivery rate and the drive speed of the reversing pump 6 can be determined and stored in a data memory of the computer 14. Even during the pumping operation, the stroke duration can be controlled via the rod-side and bottom-side cylinder shift sensors 20, 20 '; 22, 22 'depending on the set flow rate and the engine speed measure and register. If, after each switching operation, the stroke time is monitored and compared with the registered stroke duration, a reversing signal 76 "for the reversing pump 6 and / or the diverter 56 can be derived therefrom via a time monitoring routine 82 of the computer 14.
  • the comparison routine 82 expediently has an algorithm on, which is also a conversion of the stored stroke duration during the adjustment the flow rate and / or the engine speed allows.
  • the selected cylinder switch sensors 20, 20 '; 22, 22 'responsive monitoring routine 40, the pressure sensor 24 responsive pressure monitoring routine 80 and the stroke time responsive time monitoring routine 82 in this order to a redundant, priority-structured program sequence ( Fig. 3 ) linked together.
  • the reversal process is triggered via one of the three routines in the program sequence.
  • the stroke time is monitored after each switching operation and, if necessary, a new stroke duration is stored.
  • the invention relates to an apparatus and a method for controlling a two-cylinder slurry pump whose delivery piston is actuated by a hydraulic reversing pump 6 and via these driven hydraulic drive cylinder in push-pull.
  • the delivery cylinders 50, 50 ' are connected to a delivery line 58 via a diverter 56 at each pressure stroke. At the end of each delivery stroke in the delivery cylinders 50, 50 'a reversing operation of the pipe switch 56 and the reversing pump 6 is triggered.
  • the stroke duration of the pistons in the drive cylinders is measured and registered, and during each delivery stroke the stroke time is monitored and compared with the registered stroke duration, and that the reversing pump 6 is swiveled under flow reversal and / or the diverter valve is reversed when the stroke time the registered stroke duration exceeds by a predetermined amount.
  • the output signals of a pressure sensor connected to the reversing pump or cylinder shift sensors 20, 20 'arranged on the working cylinders can be evaluated for triggering a changeover process.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Control Of Multiple Motors (AREA)
EP05716191A 2004-03-26 2005-03-18 Vorrichtung und verfahren zur steuerung einer zweizylinder-dickstoffpumpe Active EP1727980B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07119583A EP1906012B1 (de) 2004-03-26 2005-03-18 Vorrichtung und Verfahren zur Steuerung einer Zweizylinder-Dickstoffpumpe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004015415A DE102004015415A1 (de) 2004-03-26 2004-03-26 Vorrichtung und Verfahren zur Steuerung einer Zweizylinder-Dickstoffpumpe
PCT/EP2005/002895 WO2005093252A1 (de) 2004-03-26 2005-03-18 Vorrichtung und verfahren zur steuerung einer zweizylinder-dickstoffpumpe

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP07119583A Division EP1906012B1 (de) 2004-03-26 2005-03-18 Vorrichtung und Verfahren zur Steuerung einer Zweizylinder-Dickstoffpumpe

Publications (2)

Publication Number Publication Date
EP1727980A1 EP1727980A1 (de) 2006-12-06
EP1727980B1 true EP1727980B1 (de) 2008-05-14

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EP05716191A Active EP1727980B1 (de) 2004-03-26 2005-03-18 Vorrichtung und verfahren zur steuerung einer zweizylinder-dickstoffpumpe
EP07119583A Active EP1906012B1 (de) 2004-03-26 2005-03-18 Vorrichtung und Verfahren zur Steuerung einer Zweizylinder-Dickstoffpumpe

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Country Status (11)

Country Link
US (1) US7611331B2 (ja)
EP (2) EP1727980B1 (ja)
JP (2) JP5028255B2 (ja)
KR (1) KR101187523B1 (ja)
CN (1) CN100595436C (ja)
AT (2) ATE413529T1 (ja)
DE (3) DE102004015415A1 (ja)
EA (1) EA007369B1 (ja)
ES (2) ES2316137T3 (ja)
UA (1) UA81964C2 (ja)
WO (1) WO2005093252A1 (ja)

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DE102004015415A1 (de) 2005-10-13
JP2011153626A (ja) 2011-08-11
KR101187523B1 (ko) 2012-10-02
CN1788158A (zh) 2006-06-14
EP1906012B1 (de) 2008-11-05
KR20060127382A (ko) 2006-12-12
UA81964C2 (uk) 2008-02-25
US20070196219A1 (en) 2007-08-23
EA007369B1 (ru) 2006-10-27
CN100595436C (zh) 2010-03-24
EP1906012A1 (de) 2008-04-02
ES2316137T3 (es) 2009-04-01
US7611331B2 (en) 2009-11-03
WO2005093252A1 (de) 2005-10-06
EA200600261A1 (ru) 2006-06-30
ES2306109T3 (es) 2008-11-01
JP2007530854A (ja) 2007-11-01
ATE395512T1 (de) 2008-05-15
ATE413529T1 (de) 2008-11-15
JP5028255B2 (ja) 2012-09-19
DE502005005923D1 (de) 2008-12-18
DE502005004119D1 (de) 2008-06-26
EP1727980A1 (de) 2006-12-06

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