EP2660467A1 - Pompe à béton et procédé pour régler la valeur de la pression d'actionnement pour son actionneur d'oscillation - Google Patents

Pompe à béton et procédé pour régler la valeur de la pression d'actionnement pour son actionneur d'oscillation Download PDF

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Publication number
EP2660467A1
EP2660467A1 EP11854363.6A EP11854363A EP2660467A1 EP 2660467 A1 EP2660467 A1 EP 2660467A1 EP 11854363 A EP11854363 A EP 11854363A EP 2660467 A1 EP2660467 A1 EP 2660467A1
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EP
European Patent Office
Prior art keywords
oil
oscillating
pressure value
concrete
cylinder
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Withdrawn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
EP11854363.6A
Other languages
German (de)
English (en)
Inventor
Rongzhi Gao
Jiaqian Wang
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.)
Hunan Zoomlion Special Vehicle Co Ltd
Zoomlion Heavy Industry Science and Technology Co Ltd
Original Assignee
Hunan Zoomlion Special Vehicle Co Ltd
Zoomlion Heavy Industry Science and Technology Co Ltd
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 Hunan Zoomlion Special Vehicle Co Ltd, Zoomlion Heavy Industry Science and Technology Co Ltd filed Critical Hunan Zoomlion Special Vehicle Co Ltd
Publication of EP2660467A1 publication Critical patent/EP2660467A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • 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 the field of concrete pumps, in particular to a concrete pump and a method for adjusting the driving pressure value of an oscillating actuator therein.
  • a concrete pump includes a conveying pipe A for conveying concrete to the destination and a main machine B, wherein the main machine of the concrete pump includes a hopper 18, a pair of concrete cylinders (a first concrete cylinder 20 and a second concrete cylinder 21), a pair of main cylinders (a first main cylinder 13 and a second main cylinder 14), an S-shaped distribution valve 17, a pair of oscillating cylinders (a first oscillating cylinder 11 and a second oscillating cylinder 12) etc.
  • the concrete cylinders are used for pumping concrete from the hopper to the conveying pipe and are driven by the main cylinders alternately moving;
  • the S-shaped distribution valve 17 is located in the hopper 18 and connected with the conveying pipe, and is connected with one of the concrete cylinders alternately to distribute concrete; at the moment, the other of the concrete cylinders sucks concrete from the hopper.
  • the alternate oscillation of the S-shaped distribution valve is implemented by one or more actuators (such as the oscillating cylinders).
  • the concrete pump further includes an accumulator 7 and a constant-pressure pump 5.
  • the accumulator 7 provides a pressure impact to enable the S-shaped distribution valve to reach enough acceleration and speed during oscillation so as to ensure the coordination between the pumping action and the distribution pipe, and enough flow.
  • the actuator is mainly used for driving the gravity of the S-shaped distribution valve, a friction between the S-shaped distribution valve and other mechanical parts, a force for cutting a concrete column in the S-shaped distribution valve, and the resistance of the concrete in the hopper 18.
  • the constant-pressure pump 5 is used for providing pressure oil to the accumulator 7 and determines the upper pressure limit of the accumulator 7.
  • the first oscillating cylinder 11 and the second oscillating cylinder 12 will drive the S-shaped distribution valve to be connected with the first concrete cylinder 20 at the side of the first main cylinder 13; at the moment, the first main cylinder 13 pushes the concrete in the first concrete cylinder 20 into the S-shaped distribution valve, and the second main cylinder 14 sucks the concrete in the hopper 18 into the second concrete cylinder 21.
  • a conversion will be made as follows: when the second main cylinder 14 is propelled under the control of a power source and the control system, the oscillating cylinders will drive the S-shaped distribution valve to oscillate to be connected with the second concrete cylinder 21 at the side of the second main cylinder 14; at the moment, the second main cylinder 14 pushes the concrete in the second concrete cylinder 21 into the S-shaped distribution valve, and the first main cylinder 13 sucks the concrete in the hopper 18 into the first concrete cylinder 20 till the two main cylinders move to the predetermined position again.
  • the system will repeat all the logics above.
  • the concrete in the hopper 18 is output to the S-shaped distribution valve continuously, and then conveyed to the destination through the conveying pipe (as shown in Fig. 1 ) by the concrete pump.
  • Fig. 3 shows a hydraulic control circuit to implement the logics above, wherein a first electromagnetic reversing valve 1 and a first small oil controlled reversing valve 2 are used for driving a first oil controlled reversing valve 3 to reverse, and the first oil controlled reversing valve 3 is used for driving the main cylinders to reverse; and similarly, a second electromagnetic reversing valve 8 and a second small oil controlled reversing valve 9 are used for driving a second oil controlled reversing valve 10 to reverse, and the second oil controlled reversing valve 10 is used for driving the oscillating cylinders to reverse.
  • the main cylinders include a first main cylinder 13 and a second main cylinder 14; and the oscillating cylinders include a first oscillating cylinder 11 and a second oscillating cylinder 12.
  • a first oil pump 4 is used for driving the main cylinders; and a second oil pump 5 is used for driving the oscillating cylinders.
  • the second oil pump 5 provides hydraulic oil to the accumulator 7, and the accumulator 7 drives the first oscillating cylinder 11 and the second oscillating cylinder 12 to oscillate.
  • the oil hydraulic pressure provided to the oscillating cylinders (the actuator) by the accumulator 7 may be too high or too low, thus the pressure provided to the S-shaped distribution valve by the actuator may be too high or too low. If the viscosity of the concrete in the hopper is low, the excessive pressure (energy) provided by the actuator will make the S-shaped distribution valve generate high-speed impact and noise, meanwhile, and will cause inertial impact and vibration to the whole structure body and unnecessary energy loss. If the viscosity of the concrete in the hopper is higher, the S-shaped distribution valve cannot oscillate as the pressure provided by the actuator is not enough.
  • an operator may manually adjust the oil hydraulic pressure provided to the oscillating cylinders (the actuator) by the accumulator 7 according to the working condition of a certain pumping, so as to adjust the pressure provided to the S-shaped distribution valve.
  • the pressure should also be variable even under the condition that the same type of concrete is pumped.
  • One technical problem to be solved by the invention is to provide a concrete pump, which can adjust the oscillation driving pressure value of an oscillating actuator provided by an oscillating hydraulic circuit according to the resistance on an S-shaped distribution valve.
  • Another technical problem to be solved by the invention is to provide a method for adjusting the driving pressure value of the oscillating actuator in the concrete pump.
  • the invention provides a concrete pump, including: a hopper for being filled with concrete, an S-shaped distribution valve provided in the hopper, an oscillating actuator connected with the S-shaped distribution valve and driven by an oscillating hydraulic circuit to control the oscillation of the S-shaped distribution valve, a stirring mechanism provided in the hopper and driven by a stirring hydraulic circuit to stir the concrete in the hopper, and concrete cylinders connected with one end of the S-shaped distribution valve and driven by a concrete cylinder hydraulic circuit to output concrete outside or to suck concrete, characterized in that the oscillating hydraulic circuit includes an oscillating driving pressure control module, the oscillating driving pressure control module adjusts the oscillation driving pressure value F of the oscillating actuator provided by the oscillating hydraulic circuit according to a first pressure value F1 and/or a second pressure value F2, where the first pressure value F1 is the oil hydraulic pressure value in the stirring hydraulic circuit, and the second pressure value F2 is the oil hydraulic pressure value in the concrete cylinder hydraulic circuit.
  • a stirring pressure sensor is provided in the stirring hydraulic circuit, and configured to detect the oil hydraulic pressure of the stirring hydraulic circuit and obtain the first pressure value F1; and a pumping pressure sensor is provided in the concrete cylinder hydraulic circuit, and configured to detect the oil hydraulic pressure value of the concrete cylinder hydraulic circuit and obtain the second pressure value F2.
  • the oscillation driving pressure value F F1*a+F2*b, where a is a first coefficient, and b is a second coefficient.
  • the range of the first coefficient is 0.3-1, and the range of the second coefficient is 0.1-0.6.
  • the oscillating actuator is oscillating cylinders; and the oscillating hydraulic circuit includes: an accumulator, an oil outlet of which is connected to the rod chambers or non-rod chambers of the oscillating cylinders to provide driving pressure for the oscillating cylinders; a constant-pressure pump, an oil outlet of which is connected with an oil inlet of the accumulator to provide hydraulic oil for the accumulator; and the driving pressure control module, which is a relief valve, and is provided in an oil circuit between the oil outlet of the constant-pressure pump and the oil inlet of the accumulator to adjust the pressure of the hydraulic oil output from the constant-pressure pump to the accumulator.
  • the oscillating cylinders include a first oscillating cylinder and a second oscillating cylinder; and a second oil controlled reversing valve is provided between the accumulator and the first oscillating cylinder and the second oscillating cylinder, a main oil inlet of the second oil controlled reversing valve being connected with the oil outlet of the accumulator, a first working oil port of the second oil controlled reversing valve being connected with the non-rod chamber of the first oscillating cylinder, and a second working oil port of the second oil controlled reversing valve being connected with the non-rod chamber of the second oscillating cylinder.
  • the concrete cylinders include a first concrete cylinder and a second concrete cylinder; and the concrete cylinder hydraulic circuit includes: a main oil pump, a first main cylinder and a second main cylinder, the piston rods of the first main cylinder and the second main cylinder are connected to the first concrete cylinder and the second concrete cylinders respectively, a first oil controlled reversing valve, a main oil inlet of which is connected with an oil outlet of the main oil pump, a first working oil port of which is connected with the rod chamber of the first main cylinder, and a second working oil port of which is connected with the rod chamber of the second main cylinder, and the pumping pressure sensor is provided in an oil circuit between the oil outlet of the main oil pump and the main oil inlet of the first oil controlled reversing valve.
  • the stirring mechanism is a stirring shaft with blades; and the stirring hydraulic circuit includes: a stirring hydraulic motor, an output shaft of which is connected with the stirring shaft, a stirring oil pump, an oil outlet of which is connected with an oil inlet of the stirring hydraulic motor, and the stirring pressure sensor is provided in an oil circuit between the oil outlet of the stirring oil pump and the oil inlet of the stirring hydraulic motor.
  • the invention provides a method for adjusting the driving pressure value of an oscillating actuator in a concrete pump, including: receiving a first pressure value F1 and/or a second pressure value F2, where the first pressure value F1 is the oil hydraulic pressure value in a stirring hydraulic circuit; and the second pressure value F2 is the oil hydraulic pressure value in a pumping hydraulic circuit; and adjusting the driving pressure value F of the oscillating actuator from the oscillating hydraulic circuit according to the first pressure value F1 and/or the second pressure value F2.
  • the range of the first coefficient is 0.3-1, and the range of the second coefficient is 0.1-0.6.
  • the oscillating hydraulic circuit includes the oscillating driving pressure control module which adjusts the oscillation driving pressure value F of the oscillating actuator provided by the oscillating hydraulic circuit according to a first pressure value F1 and/or a second pressure value F2, where the first pressure value F1 is the oil hydraulic pressure value in the stirring hydraulic circuit; and the second pressure value F2 is the oil hydraulic pressure value in the concrete cylinder hydraulic circuit. Since the first pressure value F1 and second pressure value F2 can reflect the resistance of the S-shaped distribution valve during oscillating, the oscillating driving pressure control module can adjust the oscillation driving pressure value F of the oscillating actuator provided by the oscillating hydraulic circuit in real time according to the first pressure value F1 and second pressure value F2.
  • the too high or too low pressure of the S-shaped distribution valve provided by the actuator which is caused by different types of concrete or other working conditions, is avoided; further, the situation that the S-shaped distribution valve generates high-speed impact and noise and the inertial impact and vibration will happen to the whole structure, or the S-shaped distribution valve cannot oscillate will be avoided.
  • the main machine structure of a concrete pump includes a hopper 18, an S-shaped distribution valve 17, an oscillating actuator, a stirring mechanism and concrete cylinders, wherein the hopper 18 is filled with concrete; the S-shaped distribution valve 17 is located in the hopper 18; the oscillating actuator is connected with the S-shaped distribution valve 17 and is driven by an oscillating hydraulic circuit to control the oscillation of the S-shaped distribution valve 17; the stirring mechanism (not shown) is located in the hopper 18 and is driven by a stirring hydraulic circuit to stir the concrete in the hopper 18; and the concrete cylinders are connected with one end of the S-shaped distribution valve 17 and are driven by a concrete cylinder hydraulic circuit to input concrete into the S-shaped distribution valve 17 or suck concrete from the S-shaped distribution valve 17.
  • the oscillating actuator is oscillating cylinders, more preferably, including a first oscillating cylinder 11 and a second oscillating cylinder 12.
  • the oscillating hydraulic circuit includes an accumulator 7 and a constant-pressure pump 5, wherein an oil outlet of the accumulator 7 is connected to the rod chambers or non-rod chambers of the first oscillating cylinder 11 and the second oscillating cylinder 12, the non-rod chambers in the embodiment, to provide driving pressure for the oscillating cylinders; and an oil outlet of the constant-pressure pump 5 is connected with the oil inlet of the accumulator 7 to provide hydraulic oil for the accumulator 7.
  • a second oil controlled reversing valve 10 is provided between the accumulator 7 and the first oscillating cylinder 11 and the second oscillating cylinder 12.
  • a main oil inlet of the second oil controlled reversing valve 10 is connected with the oil outlet of the accumulator 7, a first working oil port thereof is connected with the non-rod chamber of the first oscillating cylinder 11, and a second working oil port thereof is connected with the non-rod chamber of the second oscillating cylinder 12.
  • the accumulator can drive the piston rod of the first oscillating cylinder 11 to extend and the piston rod of the second oscillating cylinder 12 to retract at the same time, or the piston rod of the first oscillating cylinder 11 to retract and the piston rod of the second oscillating cylinder 12 to extend at the same time, so as to drive the S-shaped distribution valve 17 to oscillate.
  • the concrete cylinders include a first concrete cylinder 20 and a second concrete cylinder 21; and the concrete cylinder hydraulic circuit further includes a main oil pump 4, a first main cylinder 13, a second main cylinder 14 and a first oil controlled reversing valve 3.
  • the piston rods of the first second main cylinder 13 and the second main cylinder 14 are connected to the first concrete cylinder 20 and the second concrete cylinder 21 respectively.
  • a main oil inlet of the first oil controlled reversing valve 3 is connected with an oil outlet of the main oil pump 4, a first working oil port thereof is connected with the rod chamber of the first main cylinder 13, and a second working oil port thereof is connected with the rod chamber of the second main cylinder 14.
  • the main oil pump 4 can drive the piston rods of the first cylinder 13 and the second main cylinder 14 to move oppositely so as to drive the first concrete cylinder 20 to output concrete outside and the second concrete cylinder 21 to suck concrete, or drive the first concrete cylinder 20 to suck concrete and the second concrete cylinder 21 to output concrete outside.
  • a first electromagnetic reversing valve 1 and a first small oil controlled reversing valve 2 are used for driving the first oil controlled reversing valve 3 to reverse; and similarly, a second electromagnetic reversing valve 8 and a second small oil controlled reversing valve 9 are used for driving the second oil controlled reversing valve 10 to reverse.
  • the stirring mechanism is a stirring shaft with blades; and the stirring hydraulic circuit includes a stirring hydraulic motor 31 and a stirring oil pump 30.
  • an output shaft of the stirring hydraulic motor 31 is connected with the stirring shaft; and an oil outlet of the stirring oil pump 30 is connected with an oil inlet of the stirring hydraulic motor 31.
  • the oscillating hydraulic circuit includes an oscillating driving pressure control module, which adjusts the oscillation driving pressure value F of the oscillating actuator provided by the oscillating hydraulic circuit according to a first pressure value F1 and a second pressure value F2, or according to one of the first pressure value F1 and the second pressure value F2.
  • the first pressure value F1 is the oil hydraulic pressure value in the stirring hydraulic circuit
  • the second pressure value F2 is the oil hydraulic pressure value in the concrete cylinder hydraulic circuit.
  • the oscillating driving pressure control module could adjust the oscillation driving pressure value F of the oscillating actuator provided by the oscillating hydraulic circuit in real time according to the first pressure value F1 and the second pressure value F2 so as to enable the oscillation driving pressure value to be proper with the condition of the concrete in real time because the first pressure value F1 and the second pressure value F2 can reflect the resistance of the S-shaped distribution valve during oscillating.
  • the too high or too low pressure of the S-shaped distribution valve 17 which is caused by different types of concrete or other working conditions, is avoided; further, the situation that the S-shaped distribution valve 17 generates high-speed impact and noise and the inertial impact and vibration will happen to the whole structure, or the S-shaped distribution valve 17 cannot oscillate will be avoided.
  • the driving pressure control module is a relief valve 19, which is provided in the oil circuit between the oil outlet of the constant-pressure pump 5 and the oil inlet of the accumulator 7 to adjust the pressure of the hydraulic oil output from the constant-pressure pump 5 to the accumulator 7.
  • the working principle of the constant-pressure pump and the accumulator is as follows: the constant-pressure pump is used to provide pressure oil for the accumulator and determines the upper pressure limit of the accumulator.
  • the relief valve 19 adjusts the pressure of the hydraulic oil output from the constant-pressure pump 5 to the accumulator 7, it could adjust the driving pressure of the oscillating actuator (the first oscillating cylinder 11 and second oscillating cylinder 12 in the embodiment) provided by the accumulator 7, further to adjust the driving force of the S-shaped distribution valve provided by the first oscillating cylinder 11 and the second oscillating cylinder 12.
  • the relief valve 19 is only an implementation for adjusting the pressure of the hydraulic oil output from the constant-pressure pump 5 to the accumulator 7, and in practice, various other adjusting ways could also be used, for example, an oil pumping pressure cutting value adjusting mechanism in the constant-pressure pump and so on.
  • a stirring pressure sensor S1 is provided in the stirring hydraulic circuit, and configured to detect the oil hydraulic pressure of the stirring hydraulic circuit and obtain the first pressure value F1; and a pumping pressure sensor S2 is provided in the concrete cylinder hydraulic circuit, and configured to detect the oil hydraulic pressure value of the concrete cylinder hydraulic circuit and obtain the second pressure value F2.
  • the stirring pressure sensor S1 is provided in an oil circuit between the oil outlet of the stirring oil pump 30 and the oil inlet of the stirring hydraulic motor 31; and the pumping pressure sensor S2 is provided in an oil circuit between the oil outlet of the main oil pump 4 and the main oil inlet of the second oil controlled reversing valve 3.
  • a method for adjusting a driving pressure value of an oscillating actuator provided by an oscillating hydraulic circuit in a concrete pump is provided. As shown in Fig. 5 , the method includes the following steps:
  • S101 Receiving a first pressure value F1 and/or a second pressure value F2, where the first pressure value F1 is the oil hydraulic pressure value in a stirring hydraulic circuit, and the second pressure value F2 is the oil hydraulic pressure value in a pumping hydraulic circuit;
  • the method adjusts the oscillation driving pressure value F of the oscillating actuator provided by the oscillating hydraulic circuit in real time so that the oscillation driving pressure value F will stay properly in correspondence with the condition of the concrete in real time. Therefore, the too high or too low pressure of the S-shaped distribution valve 17 provided by the actuator, which is caused by different types of concrete or other working conditions, is avoided; further, the phenomena that the S-shaped distribution valve 17 generates high-speed impact and noise and the inertial impact and vibration will happen to the whole structure, or the S-shaped distribution valve 17 cannot oscillate will be avoided.

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  • 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)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
EP11854363.6A 2010-12-28 2011-05-24 Pompe à béton et procédé pour régler la valeur de la pression d'actionnement pour son actionneur d'oscillation Withdrawn EP2660467A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2010106117754A CN102094779B (zh) 2010-12-28 2010-12-28 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
PCT/CN2011/074610 WO2012088827A1 (fr) 2010-12-28 2011-05-24 Pompe à béton et procédé pour régler la valeur de la pression d'actionnement pour son actionneur d'oscillation

Publications (1)

Publication Number Publication Date
EP2660467A1 true EP2660467A1 (fr) 2013-11-06

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Application Number Title Priority Date Filing Date
EP11854363.6A Withdrawn EP2660467A1 (fr) 2010-12-28 2011-05-24 Pompe à béton et procédé pour régler la valeur de la pression d'actionnement pour son actionneur d'oscillation

Country Status (5)

Country Link
EP (1) EP2660467A1 (fr)
CN (1) CN102094779B (fr)
BR (1) BR112013016853B1 (fr)
RU (1) RU2557815C2 (fr)
WO (1) WO2012088827A1 (fr)

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Publication number Priority date Publication date Assignee Title
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
CN103032388B (zh) * 2012-12-26 2016-03-23 三一汽车制造有限公司 一种混凝土泵的摆阀液压系统及混凝土泵
CN104329306B (zh) * 2014-10-31 2016-08-17 徐州徐工施维英机械有限公司 一种液压控制系统、方法和泵
CN113006490B (zh) * 2021-03-25 2022-11-11 徐州徐工施维英机械有限公司 混凝土泵送设备及其控制方法
CN114274361B (zh) * 2021-12-28 2023-12-19 株洲中车特种装备科技有限公司 一种用于轨道施工灌浆设备的搅拌料斗

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Also Published As

Publication number Publication date
RU2557815C2 (ru) 2015-07-27
CN102094779A (zh) 2011-06-15
WO2012088827A1 (fr) 2012-07-05
BR112013016853B1 (pt) 2021-02-09
BR112013016853A2 (pt) 2016-10-04
CN102094779B (zh) 2012-01-04
RU2013131156A (ru) 2015-02-10

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