EP1306550A1 - System zur automatischen Einstellung des Betätigungsdrucks eines S-Ventils einer Betonpumpe - Google Patents

System zur automatischen Einstellung des Betätigungsdrucks eines S-Ventils einer Betonpumpe Download PDF

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Publication number
EP1306550A1
EP1306550A1 EP02102476A EP02102476A EP1306550A1 EP 1306550 A1 EP1306550 A1 EP 1306550A1 EP 02102476 A EP02102476 A EP 02102476A EP 02102476 A EP02102476 A EP 02102476A EP 1306550 A1 EP1306550 A1 EP 1306550A1
Authority
EP
European Patent Office
Prior art keywords
concrete
pressure
valve
working
actuator
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
EP02102476A
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English (en)
French (fr)
Other versions
EP1306550B1 (de
Inventor
Maurizio Baldinucci
Davide Cipolla
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CIFA SpA
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CIFA SpA
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Publication date
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Priority to SI200230278T priority Critical patent/SI1306550T1/sl
Publication of EP1306550A1 publication Critical patent/EP1306550A1/de
Application granted granted Critical
Publication of EP1306550B1 publication Critical patent/EP1306550B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F04B7/0019—Piston machines or pumps characterised by having positively-driven valving a common distribution member forming a single discharge distributor for a plurality of pumping chambers
    • F04B7/0026—Piston machines or pumps characterised by having positively-driven valving a common distribution member forming a single discharge distributor for a plurality of pumping chambers and having an oscillating movement

Definitions

  • the present invention concerns improvements in concrete pumps to automatically adjust the working thereof and provide the best performances on changing of the working conditions.
  • the invention concerns an improvement in the working system of the S-valve of the pumping unit.
  • the so-called concrete pumps comprise a pumping unit fed by a hopper and a duct to convey and deliver the concrete on the working site.
  • the pumping unit comprises a pair of cylinders apt to pump the concrete, alternately moved by a pair of hydraulic cylinders, and a special valve (S-valve) which alternately connects the concrete conveying and delivery duct with one of the two pumping cylinders, while the other draws the concrete from the hopper, and viceversa.
  • S-valve special valve
  • Such a pump is known, for example, from Italian Patents No. 1.301.562 and No. 1.301.563, in the name of the same Applicant, which are here taken as reference.
  • the alternate oscillating movement of the S-valve is obtained by means of one or more actuators which impart a pressure on the valve such as to guarantee the accelerations and speeds required to obtain the proper synchronism between the pump and the delivery duct, as well as a most regular pumping flow.
  • the pressure imparted by the actuators is preset by being planned according to the specifications of the thickest concrete presumably meant to be pumped, that is, on the basis of the supposedly hardest working conditions.
  • the user has the possibility to manually preset this parameter, on the basis of the average effort presumably made by the pump in its activity.
  • the object of the present invention is to satisfy these requirements and to solve the problems of known technique, by supplying a pumping unit in which the actuators of the S-valve may impart a pressure according to the specific momentary conditions of the concrete being pumped, so as to avoid any useless losses of energy and the consequent malfunctions pointed out above.
  • Fig. 1 is a general diagram of a concrete pump to which the present invention is applied.
  • Fig. 2 diagrammatically illustrates how the invention is applied to a concrete pump as shown in fig. 1.
  • a concrete pumping plant essentially comprises a pumping unit 1, fed by a hopper 2, and a duct (not shown) to convey and deliver the concrete on the working site.
  • the pumping unit 1 consists of a pair of cylinders 3 apt to pump the concrete, alternately moved by a pair of hydraulic cylinders 4 controlled in the two directions by a backflow pump 5 operated by a motor 6, and of a special S-valve 7 which connects the conveying and delivery duct with one of the two pumping cylinders 3, while the other cylinder 3 draws the concrete from the hopper 2.
  • the S-valve 7 is alternately moved by an actuator 8, for example a second pair of hydraulic cylinders fed by a hydraulic circuit with accumulator 9 and controlled by a group of solenoid valves 10.
  • An electronic control box 11 controls the working of the different devices according to desired laws.
  • control circuit of the actuator 8 also comprises an electroproportional pressure reducing valve 16 and a sensor 15 of the working pressure.
  • working pressure is meant a pressure which is somehow correlated with the work required to pump the specific concrete, which is in turn function of the thickness of the actual concrete.
  • the working pressure can be considered to be the hydraulic pressure acting inside the pair of pumping cylinders 3.
  • the signal issued by the pressure sensor 15 is used as a parameter to adjust the working of the electroproportional pressure reducing valve 16, and thus the charging pressure of the accumulator 9. This allows to adjust the pressure force of the actuator 8 according to the working pressure detected by the pressure sensor 15.
  • the working pressure can be detected in a different way from that described heretofore, for instance also in a different position.
  • a technician of the field will moreover be able to apply the teachings provided herein to a different type of actuator for the movement of the S-valve - for example a compressed air actuator or an electrically controlled actuator - by suitably modifying the control system in order to adapt the invention to the specific application.
  • a different type of actuator for the movement of the S-valve - for example a compressed air actuator or an electrically controlled actuator - by suitably modifying the control system in order to adapt the invention to the specific application.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Check Valves (AREA)
EP02102476A 2001-10-25 2002-10-23 System zur automatischen Einstellung des Betätigungsdrucks eines S-Ventils einer Betonpumpe Expired - Lifetime EP1306550B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200230278T SI1306550T1 (sl) 2001-10-25 2002-10-23 Izboljsana crpalka za beton s sredstvom za avtomatsko nastavitev delovanja S-ventila glede na vrstobetona

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20012246 2001-10-25
IT2001MI002246A ITMI20012246A1 (it) 2001-10-25 2001-10-25 Pompa per calcestruzzo perfezionata con mezzi di regolazione automatica dell'azionamento della valvola ad s in funzione del tipo di calcestr

Publications (2)

Publication Number Publication Date
EP1306550A1 true EP1306550A1 (de) 2003-05-02
EP1306550B1 EP1306550B1 (de) 2005-11-30

Family

ID=11448548

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02102476A Expired - Lifetime EP1306550B1 (de) 2001-10-25 2002-10-23 System zur automatischen Einstellung des Betätigungsdrucks eines S-Ventils einer Betonpumpe

Country Status (8)

Country Link
EP (1) EP1306550B1 (de)
AT (1) ATE311535T1 (de)
CY (1) CY1104976T1 (de)
DE (1) DE60207670T2 (de)
DK (1) DK1306550T3 (de)
ES (1) ES2254607T3 (de)
IT (1) ITMI20012246A1 (de)
SI (1) SI1306550T1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102094779A (zh) * 2010-12-28 2011-06-15 长沙中联重工科技发展股份有限公司 混凝土泵及调节该泵中对摆动执行器的驱动压力值的方法
CN102650540A (zh) * 2011-02-28 2012-08-29 利勃海尔-韦尔克嫩青有限公司 确定液体传输装置的输送速度的方法
CN103032421A (zh) * 2012-12-26 2013-04-10 中联重科股份有限公司 换向液压系统及其控制方法、混凝土泵送设备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3380388A (en) * 1966-02-03 1968-04-30 Robert T Sherrod Automatic control system for concrete pump
FR1532981A (fr) * 1967-07-28 1968-07-12 Danken Appareil de pompage de béton
DE3242600A1 (de) * 1981-06-09 1984-05-24 Maschinenfabrik Walter Scheele GmbH & Co KG, 4750 Unna-Massen Jochfoermiges widerlager fuer die rohrweiche einer betonpumpe
JPH0261372A (ja) * 1988-08-24 1990-03-01 Kyokuto Kaihatsu Kogyo Co Ltd コンクリートポンプ車におけるシーケンス駆動装置
DE4035518A1 (de) * 1990-11-08 1992-05-14 Putzmeister Maschf Verfahren und anordnung zur messtechnischen bestimmung des volumenstroms von mittels einer kolbendickstoffpumpe transportiertem foerdergut
JPH04314979A (ja) * 1991-04-12 1992-11-06 Ishikawajima Constr Mach Co 高粘性流体ポンプの圧送圧力制御方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3380388A (en) * 1966-02-03 1968-04-30 Robert T Sherrod Automatic control system for concrete pump
FR1532981A (fr) * 1967-07-28 1968-07-12 Danken Appareil de pompage de béton
DE3242600A1 (de) * 1981-06-09 1984-05-24 Maschinenfabrik Walter Scheele GmbH & Co KG, 4750 Unna-Massen Jochfoermiges widerlager fuer die rohrweiche einer betonpumpe
JPH0261372A (ja) * 1988-08-24 1990-03-01 Kyokuto Kaihatsu Kogyo Co Ltd コンクリートポンプ車におけるシーケンス駆動装置
DE4035518A1 (de) * 1990-11-08 1992-05-14 Putzmeister Maschf Verfahren und anordnung zur messtechnischen bestimmung des volumenstroms von mittels einer kolbendickstoffpumpe transportiertem foerdergut
JPH04314979A (ja) * 1991-04-12 1992-11-06 Ishikawajima Constr Mach Co 高粘性流体ポンプの圧送圧力制御方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 014, no. 235 (M - 0975) 18 May 1990 (1990-05-18) *
PATENT ABSTRACTS OF JAPAN vol. 017, no. 136 (M - 1384) 19 March 1993 (1993-03-19) *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102094779A (zh) * 2010-12-28 2011-06-15 长沙中联重工科技发展股份有限公司 混凝土泵及调节该泵中对摆动执行器的驱动压力值的方法
CN102094779B (zh) * 2010-12-28 2012-01-04 长沙中联重工科技发展股份有限公司 混凝土泵及调节该泵中对摆动执行器的驱动压力值的方法
CN102650540A (zh) * 2011-02-28 2012-08-29 利勃海尔-韦尔克嫩青有限公司 确定液体传输装置的输送速度的方法
EP2492508A3 (de) * 2011-02-28 2013-04-03 Liebherr-Werk Nenzing Ges.m.b.H Verfahren zur Bestimmung der Fördermenge eines Flüssigkeitsfördermittels
US8696323B2 (en) 2011-02-28 2014-04-15 Liebherr-Werk Nenzing Gmbh Method for determining the delivery rate of a liquid conveying device
CN102650540B (zh) * 2011-02-28 2016-08-03 利勃海尔-韦尔克嫩青有限公司 确定液体传输装置的输送速度的方法
CN103032421A (zh) * 2012-12-26 2013-04-10 中联重科股份有限公司 换向液压系统及其控制方法、混凝土泵送设备
CN103032421B (zh) * 2012-12-26 2015-04-22 中联重科股份有限公司 换向液压系统及其控制方法、混凝土泵送设备

Also Published As

Publication number Publication date
ATE311535T1 (de) 2005-12-15
ES2254607T3 (es) 2006-06-16
ITMI20012246A1 (it) 2003-04-25
DE60207670D1 (de) 2006-01-05
CY1104976T1 (el) 2010-03-03
DE60207670T2 (de) 2006-09-07
SI1306550T1 (sl) 2006-06-30
DK1306550T3 (da) 2006-04-10
EP1306550B1 (de) 2005-11-30

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