WO2014000389A1 - Procédé de commande de la course de pompe d'une pompe à deux cylindres pour matière visqueuse et dispositif de pompage à cet effet - Google Patents

Procédé de commande de la course de pompe d'une pompe à deux cylindres pour matière visqueuse et dispositif de pompage à cet effet Download PDF

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Publication number
WO2014000389A1
WO2014000389A1 PCT/CN2012/086121 CN2012086121W WO2014000389A1 WO 2014000389 A1 WO2014000389 A1 WO 2014000389A1 CN 2012086121 W CN2012086121 W CN 2012086121W WO 2014000389 A1 WO2014000389 A1 WO 2014000389A1
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WIPO (PCT)
Prior art keywords
pumping stroke
pumping
concrete
cylinder
pump
Prior art date
Application number
PCT/CN2012/086121
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English (en)
Chinese (zh)
Inventor
裴杰
万梁
王佳茜
李四中
彭志强
Original Assignee
中联重科股份有限公司
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Application filed by 中联重科股份有限公司 filed Critical 中联重科股份有限公司
Publication of WO2014000389A1 publication Critical patent/WO2014000389A1/fr

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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
    • 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
    • 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
    • F04B9/111—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 with two mechanically connected pumping members
    • F04B9/1115—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 with two mechanically connected pumping members the movement of the pumping pistons in only one direction being obtained by a single-acting piston liquid motor, e.g. actuation in the other direction by spring means

Definitions

  • the invention relates to a viscous material pumping control method, in particular to a pumping stroke control method for a viscous material double cylinder pump. Further, the present invention relates to a viscous material pumping apparatus to which the pumping stroke control method is applied.
  • Viscous materials such as mud and concrete are commonly used construction materials in engineering and construction, and viscous materials such as concrete pumps (also called “concrete pump” or “concrete pumping device”) are a kind of engineering. Construction machinery pumping device widely used in construction.
  • the main structure of this viscous material double-cylinder pump is similar to that of common concrete pumps, for example. It mainly uses pressure to continuously transport viscous materials along the pipeline, generally by electric motor (or internal combustion engine).
  • the hydraulic pump is driven to form a hydraulic oil with a certain pressure, and the driving main cylinder drives the pistons in the two conveying cylinders to alternately reciprocate, so that the viscous material is continuously sucked from the hopper into the conveying cylinder and transported to the construction site through the conveying pipeline.
  • the concrete pump generally includes two main cylinders (also referred to as "master cylinders”), two concrete delivery cylinders (also known as “cylinders” by those skilled in the art), two concrete pistons, and two swing cylinders. (The so-called “pendulum cylinder”), the hopper and the distribution width (for example, the S-shaped distribution width), wherein the rodless chambers of the two main cylinders are connected to each other, and the rod chambers are respectively connected to the commutation width, the commutation is wide Connected to the oil inlet passage and the oil tank, and selectively exchanges the rod chamber of the first main cylinder of the two main cylinders with the oil inlet passage by the commutation of the commutating width, and the second main cylinder has The rod cavity is in communication with the oil tank, or the rod chamber of the first main cylinder is communicated with the oil tank, and the rod chamber of the second main cylinder is in communication with the oil inlet oil passage.
  • the two main cylinders Since the rodless chambers of the two main cylinders are connected to each other and the hydraulic oil is closed, the two The hydraulic oil in the rodless chamber of the main cylinder functions as a transmission medium, and the two main cylinders can be alternately expanded and contracted by alternately feeding oil to the rod chambers of the two main cylinders.
  • Two concrete pistons are respectively located in the two concrete delivery cylinders and are respectively connected to the piston rods of the main cylinders.
  • the distribution is widened under the oil pressure of the wide cylinder, and then moved to the first position, so that the material of the first concrete conveying cylinder is connected to the concrete conveying pipe via the distribution width, and the material of the second concrete conveying cylinder is
  • the hopper inlet is connected, at which time the hydraulic oil enters the rod cavity of the second main cylinder, so that the piston rod of the second main cylinder is retracted, the piston rod of the first main cylinder is extended, and the piston rod of the first main cylinder Pushing the concrete piston in the first concrete conveying cylinder, so that the concrete in the first concrete conveying cylinder is sent out by the distributed wide pump, and the piston rod of the second main cylinder is retracted to drive the concrete piston in the second concrete conveying cylinder to retract, Thereby, a vacuum is formed in the second concrete delivery cylinder, and the concrete is sucked from the hopper into the second concrete delivery cylinder, so that the reciprocating operation is alternately performed to achieve continuous pumping of the concrete.
  • the two main cylinders are not limited to the case where the rodless chambers communicate with each other to form a communication chamber.
  • the rod chambers of the two main cylinders may be connected to each other to form a communication chamber.
  • the rodless chambers of the two main cylinders respectively form the drive chamber and are connected to the commutation.
  • the above-mentioned prior art concrete pumping basically uses a fixed stroke to pump the concrete.
  • the fixed stroke is adopted due to different parameters such as the viscosity and slump of the fluid concrete in different working processes.
  • the concrete delivery cylinder has insufficient suction in many working conditions, but the main cylinder and the concrete delivery cylinder still operate according to a fixed stroke, which greatly reduces the pumping efficiency of the concrete pump.
  • the main disadvantages of the prior art concrete pump are: When the concrete pump pumps fluid concrete with different material parameters, under certain working conditions, there will be insufficient suction of the concrete conveying cylinder, but the main Cylinders and concrete delivery cylinders still operate in a fixed one or two strokes, resulting in low concrete pumping efficiency and high energy waste, resulting in better pumping and suction efficiency except for a few specific concrete conditions. Both are in a working state in which the pumping efficiency is lowered.
  • the technical problem to be solved by the present invention is to provide a pumping stroke control method for a viscous material double-cylinder pump, which can be viscous material according to different material conditions of the viscous material double-cylinder pump.
  • the pumping stroke of the viscous material double cylinder pump is adaptively adjusted to optimize the pumping efficiency of the viscous material double cylinder pump.
  • the technical problem to be further solved by the present invention is to provide a viscous material pumping device capable of adapting to the viscous material of different material condition parameters pumped by the viscous material double-cylinder pump.
  • the pumping stroke of the viscous material double cylinder pump is adjusted to optimize the pumping efficiency of the viscous material double cylinder pump.
  • the present invention provides a pumping stroke control method for a viscous material two-cylinder pump, which comprises the following steps: First, determining the predetermined condition according to a predetermined type of condition parameter of the viscous material to be transported. a target pumping stroke of the viscous material two-cylinder pump corresponding to the type of condition parameter; and second, by adjusting the volume of the hydraulic oil contained in the communication chamber of the viscous material two-cylinder pump, The current actual pumping stroke of the thick material dual cylinder pump is adjusted to the target pumping stroke.
  • the viscous material is concrete
  • the predetermined type of condition parameter is the viscosity and/or slump of the concrete.
  • the first step in the first step, inputting the predetermined type of condition parameter determined by the detection into a controller having a database according to the predetermined type
  • the condition parameter is determined by querying the database to determine the target pumping stroke corresponding to the predetermined type of condition parameter.
  • the second step detecting the actual pumping stroke of the viscous material two-cylinder pump, when the actual pumping stroke is greater than the target pumping stroke, by increasing the communication chamber
  • the volume of the hydraulic oil reduces the actual pumping stroke to the target pumping stroke; when the actual pumping stroke is less than the target pumping stroke, by reducing the hydraulic oil in the communicating chamber
  • the volume causes the actual pumping stroke to increase to the target pumping stroke.
  • the volume of the hydraulic oil in the communication chamber is continuously adjusted, and the actual pumping stroke of the viscous material two-cylinder pump is detected in real time until the actual pumping stroke Adjusting to the target pumping stroke stops stopping adjusting the volume of hydraulic oil within the communication chamber.
  • the volume of the hydraulic oil injected or extracted in the communication cavity is the difference between the actual pumping stroke and the target pumping stroke.
  • the absolute value is multiplied by the cross-sectional area of the communication cavity, wherein the communication cavity is formed when the communication cavity is formed by the first main cylinder of the viscous material two-cylinder pump and the rodless cavity of the second main cylinder.
  • the cross-sectional area is equal to the cross-sectional area of the rodless chamber of the first main cylinder or the second main cylinder; when the communication chamber is formed by the rod chambers of the first main cylinder and the second main cylinder,
  • the cross-sectional area of the communication chamber is equal to the cross-sectional area of the rod chamber of the first main cylinder or the second main cylinder minus the cross-sectional area of the piston rod of the first main cylinder or the second main cylinder.
  • the pumping stroke control method further includes a third step, in which the actual pumping stroke adjusted by the viscous material two-cylinder pump is detected to determine the adjusted actual pumping stroke. Equal to the target pumping stroke.
  • hydraulic oil is injected into the communication chamber by a pumping device or hydraulic oil is withdrawn from the communication chamber to adjust the volume of the hydraulic oil in the communication chamber.
  • the present invention also provides a viscous material pumping device, comprising a viscous material double-cylinder pump, wherein the viscous material pumping device further comprises a controller for adjusting the communication of the viscous material double-cylinder pump a pumping stroke adjusting device for a hydraulic oil volume in the chamber, and a displacement sensor for detecting an actual pumping stroke of the viscous material two-cylinder pump, the controller being electrically connected to the displacement sensor and the pumping a stroke adjustment device, the controller determines a target pumping stroke of the viscous material two-cylinder pump corresponding to the predetermined type of condition parameter according to a predetermined type of condition parameter of the viscous material to be conveyed, and further controls the The pumping stroke adjusting device adjusts the volume of the hydraulic oil contained in the communication chamber of the viscous material two-cylinder pump, thereby adjusting the current actual pumping stroke of the viscous material twin-cylinder pump to the target pumping stroke.
  • a controller for adjusting the communication of the viscous material double-cylinder pump
  • the pumping stroke adjusting device includes a pumping device and a driving device of the pumping device, the controller is electrically connected to the driving device, the pumping device and the viscous material double cylinder pump
  • the communication chamber is in communication to selectively draw or inject hydraulic oil from the communication chamber.
  • the pumping device is a metering pump
  • the driving device is a motor
  • the viscous material pumping device further comprises a concrete condition detecting device electrically connected to the controller to input the detected predetermined type of condition parameter signal into the control Device.
  • the displacement sensor is a magnetoresistive linear displacement sensor.
  • the viscous material pumping device is a concrete pumping device.
  • the pumping stroke control method of the viscous material double-cylinder pump of the present invention and the viscous material pumping device are adopted according to a predetermined type of material condition parameter (for example, viscosity or slump) according to the viscous material.
  • the pumping stroke of the viscous material double-cylinder pump is adaptively adjusted, so that the viscous material conveying cylinder effectively avoids the phenomenon of insufficient suction, thereby improving the pumping suction efficiency and saving energy.
  • the invention realizes the stepless adjustment of the pumping stroke of the viscous material double-cylinder pump, so that the viscous material double cylinder
  • the viscous material of the pump for different conditions achieves the desired suction efficiency under a relatively ideal pumping stroke.
  • the viscous material pumping device of the present invention has a simple structure, is convenient to operate, and can effectively extend the life of the delivery piston because the effective stroke of the delivery piston is effectively reduced.
  • FIG. 1 is a cross-sectional structural view showing a concrete pump disclosed in the prior art Chinese utility model patent CN201486790U.
  • Fig. 2 is a schematic view showing the hydraulic principle of the hydraulic distribution pump disclosed in U.S. Patent No. 6,422,840 B2.
  • FIG. 3 is a schematic view showing the structure principle of a viscous material pumping apparatus according to an embodiment of the present invention, wherein a concrete pumping apparatus is taken as an example for display.
  • Fig. 4 is a flow chart showing a method of controlling the pumping stroke of the viscous material double-cylinder pump according to a preferred embodiment of the present invention, wherein the pumping stroke control of the concrete pump is taken as an example.
  • the pumping stroke control method of the viscous material double-cylinder pump of the present invention and the viscous material pumping apparatus are mainly described below by taking a concrete pump as an example.
  • the pumping stroke control method of the viscous material double cylinder pump is called “the pumping stroke control method of the concrete pump
  • the viscous material pumping equipment is called the “concrete pumping equipment”
  • the main structure of the viscous material double-cylinder pump is similar to that of the concrete pump, the following specific embodiments can be universally applied to the control of the pumping stroke of the viscous material double-cylinder pump, such as a double-cylinder pump such as mud or mortar. Control of the pumping stroke.
  • concrete refers to fluid concrete that can be pumped through a concrete pump, rather than concrete in a solidified state
  • the material condition parameters of the fluid concrete can be selected according to the needs, in the following technical solutions of the invention, due to the suction rate of the concrete and the viscosity and slump of the concrete (for measuring the plasticizing performance of the concrete and pumping)
  • the usual parameters of performance are closely related, so viscosity and/or slump are primarily chosen as the basis for determining the pumping stroke, but the technical solution of the present invention is not limited to the use of viscosity and/or slump as a basis for determining the pumping stroke.
  • other suitable material parameters (such as water content) of concrete may be used as the reference, and therefore the protection range of the present invention should not be limited by selecting specific condition parameters of the concrete;
  • the rod chambers of the first main cylinder 1 and the second main cylinder 2 are respectively
  • the first working oil passage A and the second working oil passage B are connected to the oil inlet oil passage and the oil tank via the reversing direction, thereby forming a telescopic reversing control loop (only the first working oil passage A and FIG. 3 are schematically shown in FIG. 3).
  • the second working oil passage B but alternatively, it is also possible that the rod chambers of the first main cylinder 1 and the second main cylinder 2 communicate with each other to constitute the communication chamber 5, and the first main cylinder 1 and the second main unit
  • the rodless chambers of the cylinder 2 are respectively connected to the first working oil passage A and the second working oil passage B, and these simple modifications are all within the scope of protection of the present invention.
  • some other well-known components of the concrete pump are omitted in FIG. 3, such as the distribution width, the swing cylinder, the hopper, and the like provided at the delivery end of the concrete delivery cylinders 11, 12, but do not affect the understanding of the technical solutions of the present invention by those skilled in the art.
  • the main technical idea of the pumping stroke control method of the concrete pump of the present invention is to change the actual pumping stroke L of the concrete pump by adjusting the amount (ie, volume) of the hydraulic oil in the communication chamber 5.
  • the specific principle is as follows, see FIG. It is shown that the hydraulic oil is theoretically incompressible.
  • the advancement positions of the first concrete piston 13 and the second concrete piston 14 in the first concrete delivery cylinder 11 and the second concrete delivery cylinder 12 are shown. Is fixed, for example, in the situation shown in FIG.
  • the first working oil passage A is oiled, and the second working oil passage B is returned to oil, thereby pushing the first piston rod 3 of the first main cylinder 1 to move to the left
  • a piston rod 3 drives the first concrete piston 13 in the first concrete delivery cylinder 11 to move to the left
  • the first piston rod 3 moves to the left, thereby compressing the rodless cavity as the first main cylinder 1 (constituting the communication chamber 5)
  • the hydraulic oil in the component causes the hydraulic oil in the rodless chamber of the first main cylinder 1 to flow to the rodless rod of the second main cylinder 2 In the cavity, thereby pushing the second piston rod 4 of the second main cylinder 2 to the right, the second piston rod 4 pushing the second concrete piston 14 to the right, in FIG.
  • the second concrete piston 14 has moved the second concrete conveying
  • the advancing end position of the right end of the cylinder 14 in order to avoid the impact cylinder, the corresponding limit stop on the concrete delivery cylinder generally has a predetermined interval from the right end of the concrete delivery cylinder
  • the first piston rod 3 is in the first main cylinder 1 is still moved to the left in position
  • the first concrete piston 13 does not move to the left end suction end position of the first concrete delivery cylinder 11 in the first concrete delivery cylinder 11, but since the second concrete piston 14 has moved into position It cannot continue to move to the right again.
  • the first piston rod cannot be pushed regardless of whether the first working oil passage A continues to feed oil. 3 Continue to move to the left. In the case where the second concrete piston 14 shown in FIG. 3 has moved to the right in position, the reversing operation is performed such that the second working oil passage B is oiled, and the first working oil passage A is returned to the oil, and the second piston rod 4 is returned.
  • the first and second main cylinders 1, 2 of the concrete pump are the same hydraulic cylinder, and the first concrete delivery cylinder and the second concrete delivery cylinder 11, 12 are also the same delivery cylinder, and are on the main structure Symmetrical setting), that is to say, in this case, the actual pumping stroke of the concrete pump is L, it should be noted that the actual pumping stroke L of the concrete pump is equal to the first piston rod 3 of the first main cylinder 1 (or The telescopic movement stroke of the second piston rod 4) of the second master cylinder 2 and the telescopic movement stroke of the first concrete piston 13 of the first concrete delivery cylinder 11 (or the second concrete piston 14 of the second concrete delivery cylinder 12) Controlling the change in the telescopic movement stroke of the first piston rod 3 of
  • the second main cylinder 2 is second.
  • the piston rod 4 cannot increase the volume of the rodless chamber of the second main cylinder 2 because the second concrete piston 14 has moved into position, and the predetermined volume V of hydraulic oil can only be pushed to the right.
  • the first piston rod 3 of the first main cylinder 1 increases the volume of the rodless chamber of the first main cylinder 1, and in the state of FIG. 3, the first piston rod 3 moves to the right, and the actual pumping stroke L is reduced.
  • the reduced distance is the predetermined volume V of the increased hydraulic oil divided by the cross-sectional area of the rodless chamber of the first hydraulic cylinder, of course, in the case where the rod chamber constitutes the communication chamber 5, the predetermined volume V of the hydraulic oil is increased. It should be divided by the rod cavity cross-sectional area of the first hydraulic cylinder minus the cross-sectional area of the piston rod; correspondingly, if the hydraulic oil is reduced by a predetermined volume V from the communication chamber by the pump stroke adjustment device 8, the first piston rod 3 will move to the left from the position shown in Fig. 3, so that the actual pumping stroke L is increased.
  • the principle is the same whether dynamic or static, that is, during the pumping process of the concrete pump, the volume of hydraulic oil in the communication chamber 5 can be changed (due to the hydraulic oil
  • the incompressibility that is, changing the volume of the communication chamber 5
  • the telescopic movement stroke of the main cylinder (the first main cylinder 1 and the second main cylinder 2) becomes larger, and the actual pumping stroke L of the concrete pump is increased; if the hydraulic oil in the communication chamber 5 is connected
  • the total volume is increased, the telescopic movement stroke of the main cylinder becomes smaller, and the pumping stroke L of the concrete pump is reduced.
  • the control of the expansion and contraction movement of the main cylinder can be realized, thereby achieving stepless adjustment of the pumping stroke of the concrete pump.
  • the stepless adjustment of the present invention means that the concrete pump can be adjusted to a plurality of pumping strokes or a substantially continuous pumping stroke.
  • the pumping stroke control method of the concrete pump of the present invention comprises the following steps: First, determining a target of the concrete pump corresponding to the predetermined type of condition parameter according to a predetermined type of condition parameter of the concrete to be conveyed Pumping stroke (generally determined by comparing the condition parameters with a database or data table); second, the concrete pump is adjusted by adjusting the volume of hydraulic oil contained in the communication chamber 5 of the concrete pump The actual pumping stroke L is adjusted to the target pumping stroke.
  • the predetermined type of material condition parameters of the concrete to be conveyed mainly refer to The pumping performance is relatively related to the feed condition parameter.
  • one or two condition parameters can generally be selected, for example, preferably the viscosity and/or slump of the concrete can be selected.
  • Degree, concrete viscosity and slump are two key parameters of the material that affect the pumping performance of the concrete.
  • the selected predetermined type of condition parameters are not limited to the above typical conditions, such as water content. , sediment concentration, etc.
  • the viscosity of concrete can generally be measured by a concrete viscometer, and it is of course also possible to test the viscosity of concrete by using other known viscosity measuring methods.
  • the slump of concrete has a standard measurement method. Specifically, for example, a slump bucket with a top mouth of 100 mm, a lower mouth of 200 mm, and a height of 300 mm is poured into the concrete and then tamped, and then the bucket is pulled up. The concrete is self-weighted. The slump phenomenon occurs, and the height of the highest point of the collapsed concrete is subtracted from the height of the barrel (300 mm), which is called the slump. If the difference is 10 mm, the slump is 10.
  • the detection of viscosity and slump can be carried out using a concrete condition detecting device capable of generating a parameter of the condition parameter, such as a concrete viscosity numerical control intelligent tester, a concrete slump numerical control detector, etc., which are in the concrete industry. It has been relatively widely used, such as the concrete viscosity tester disclosed in the Chinese utility model patent CN200920305982X. This is particularly advantageous in determining the target pumping stroke of the concrete pump corresponding to the predetermined type of condition parameter by the controller 9 based on a predetermined type of condition parameter of the concrete, which may detect the predetermined type of condition parameter signal detected. Automatically input to control 9 of it.
  • the predetermined type of material parameters of the concrete to be conveyed can generally be obtained by testing in advance, but it is not limited thereto. In the case of large-scale operation, the past test is based on the mixing ratio and composition of the concrete. The data can be used to directly determine the predetermined type of material parameters for the concrete.
  • the target pumping stroke of the concrete pump corresponding to the predetermined condition parameter may be determined by the controller 9 according to the predetermined type of condition parameters, and the concrete determined by the detection may be preferably determined.
  • the predetermined condition parameter is input into the controller 9, and the controller 9 has a database in which the target pumping stroke corresponding to the condition parameter of each value of the concrete is stored, and the controller 9 is based on the input predetermined material.
  • a parameter, the target pumping stroke corresponding to the predetermined condition parameter is found by querying the database, thereby determining the predetermined condition The target pumping stroke corresponding to the parameter.
  • the controller 9 can be an electronic control unit, a programmable controller, a single chip microcomputer or the like.
  • the target pumping stroke corresponding to the concrete of different material conditions is generally the ideal or ideal pumping stroke of the concrete of the material condition parameter.
  • the concrete pump adopts the target pumping stroke to carry out the concrete pumping of the material condition, the concrete The delivery cylinder is less prone to insufficient suction and thus has a relatively high pumping efficiency.
  • the establishment of the database mainly through the simulation of the working condition test, summarizing the target pumping stroke of the concrete in various conditions, so that the corresponding concrete condition parameters have the corresponding target pumping stroke. For example, for a certain type of concrete pump, the target pumping stroke corresponding to the concrete condition of the concrete pump is determined by a large number of simulated working conditions tests.
  • the current actual pumping stroke L of the concrete pump can be detected, which can be achieved by a linear displacement sensor (for example, a reluctance linear displacement sensor), when the actual pumping stroke L is greater than the At the target pumping stroke, the actual pumping stroke L can be reduced to the target pumping stroke by increasing the volume of hydraulic oil within the communication chamber 5.
  • the actual pumping stroke L is smaller than the target pumping stroke, the actual pumping stroke L can be increased to the target pumping stroke by reducing the volume of hydraulic oil in the communication chamber 5.
  • the adjustment process may take a plurality of adjustment sequences. For example, the volume of the hydraulic oil in the communication chamber 5 may be continuously adjusted by the pump stroke adjustment device.
  • the metering pump may be continuously injected into or from the communication chamber 5.
  • the communication chamber 5 draws out the hydraulic oil, and detects the actual pumping stroke L of the concrete pump in real time until the actual pumping stroke L is adjusted to the target pumping stroke to stop adjusting the volume of the hydraulic oil in the communication chamber 5.
  • the communication chamber 5 is formed by the rodless chamber communication of the first main cylinder 1 and the second main cylinder 2, or is formed by the rod chamber communication of the first main cylinder 1 and the second main cylinder 2,
  • the cross-sectional area of the communication chamber 5 is determined, so that it is most preferable to first calculate the volume of hydraulic oil that needs to be increased or decreased according to the target pumping stroke and the actual pumping stroke L, and then pass the metering pump to the communication chamber 5 Injecting hydraulic oil or withdrawing hydraulic oil from the communication chamber 5 to adjust the communication chamber 5 The volume of hydraulic oil inside.
  • the volume of the hydraulic oil injected or extracted in the communication chamber 5 is the absolute value of the difference between the actual pumping stroke L and the target pumping stroke multiplied by the cross-sectional area of the communication chamber 5, wherein
  • the cross-sectional area of the communication chamber 5 is equal to the rodless chamber of the first main cylinder 1 or the second main cylinder 2 Cross-sectional area;
  • the cross-sectional area of the communication chamber 5 is equal to the rod cavity of the first main cylinder 1 or the second main cylinder 2
  • the cross-sectional area is subtracted from the cross-sectional area of the piston rod 3 or 4 of the first main cylinder 1 or the second main cylinder 2.
  • the actual pumping stroke L of the concrete pump is adjusted to the target pumping stroke. Further preferably, in order to verify that the adjustment is accurate, the actual pumping stroke of the concrete pump can be further detected and whether the adjusted actual pumping stroke is equal to the target pumping stroke to determine if further adjustment is required.
  • the pumping stroke control method of the concrete pump of the present invention preferably can set a target pumping stroke database based on the optimum or better suction efficiency of the concrete condition in the controller, that is, each corresponding The predetermined type of material condition of the concrete will have a corresponding target pumping stroke; before the concrete is pumped, the predetermined type of condition parameters of the concrete are first input into the controller, and the controller will query the target pumping stroke in the above database. Further, according to the target pumping stroke of the inquiry, the pumping stroke adjusting device is controlled to adjust the telescopic control stroke of the master cylinder, for example, when the actual pumping stroke fed back by the displacement sensor is the target pumping stroke, the stroke adjustment ends.
  • the concrete pump When pumping, the concrete pump will pump with this target pumping stroke, and the concrete delivery cylinder will achieve the desired suction efficiency. That is to say, the key technical points of the present invention are as follows: First, a database of target pumping strokes under various concrete conditions is set, and an ideal suction efficiency in the concrete delivery cylinder can be realized according to the target pumping stroke. Secondly, a pumping stroke adjusting device is provided, and the volume of the hydraulic oil in the communication chamber 5 can be adjusted by the pumping stroke adjusting device, so that the pumping stroke can be adjusted as needed, thereby achieving a stepless adjustment of the pumping stroke.
  • a specific embodiment of the concrete pumping apparatus of the present invention capable of realizing the pumping stroke control method of the above concrete pump will be briefly described below.
  • the concrete pumping apparatus of the present invention comprises a concrete pump, wherein the concrete pumping apparatus further comprises a controller 9, a pumping stroke for adjusting the volume of hydraulic oil in the communication chamber 5 of the concrete pump An adjustment device 8 and a displacement sensor for detecting an actual pumping stroke L of the concrete pump, the pumping stroke adjustment device comprising a pumping device and a driving device of the pumping device, wherein the controller 9 is electrically connected to The displacement sensor and the pumping stroke adjusting device 8 determine the target pumping stroke of the concrete pump corresponding to the predetermined type of condition parameter according to the setting condition parameter of the concrete to be conveyed, and further control The pumping stroke adjusting device 8 adjusts the volume of hydraulic oil contained in the communication chamber 5 of the concrete pump, and adjusts the current actual pumping stroke L of the concrete pump to the target pumping stroke.
  • the pumping stroke adjusting device includes a pumping device and a driving device of the pumping device, wherein the controller 9 is electrically connected to the driving device, and the connecting chamber of the pumping device and the concrete pump 5 communicates to selectively draw or inject hydraulic oil from the communication chamber 5 into the communication chamber 5.
  • the pumping device may be a metering pump or other pumping device capable of pumping hydraulic oil (for example, a plunger pump with a scale, the driving device of the plunger pump may be, for example, an electric telescopic rod).
  • the driving device may be an electric motor or a hydraulic motor drive assembly having an electromagnetically commutated wide, etc., and the pumping or pumping of the hydraulic oil is realized by the driving device driving the pumping device such as the metering pump or the plunger pump.
  • pumping or pumping can be achieved by controlling the motor to drive the metering pump forward and reverse.
  • the two ports of the metering pump can be connected to the communication chamber 5 and the fuel tank, respectively.
  • the device can also use two metering pumps, one metering pump for pumping hydraulic oil from the communication chamber and the other metering pump for pumping oil into the communication chamber 5 (the two ports of each metering pump can be connected separately)
  • the communication chamber 5 and the fuel tank the pumping stroke adjusting device 8 for adjusting the volume of the hydraulic oil in the communication chamber 5 of the concrete pump, for the technician in the hydraulic field
  • This pumping stroke adjustment device can take many forms, in its package
  • the related pumping device and the driving device can be variously modified by those skilled in the art, and details are not described herein.
  • the concrete pumping apparatus further includes a concrete condition detecting device 10 electrically connected to the controller 9 to input the detected predetermined type of condition parameter signal into the Controller 9.
  • the concrete condition detecting device 10 may be the above-described concrete viscosity numerical control intelligent tester and/or concrete slump numerical control detector.
  • the displacement sensor generally only needs to be installed on the first main cylinder 1 or the second main cylinder 2, and the second piston rod 3 of the first main cylinder 1 and the second main cylinder 2 of FIG.
  • the first piston rod displacement sensor 6 and the second piston rod displacement sensor 7 are simultaneously mounted on the piston rod 4, and the first piston rod displacement sensor 6 and the second piston rod displacement sensor 7 are magnetoresistive linear displacement sensors, which are It is commonly used in stroke detection of hydraulic cylinders, which are well known to those skilled in the art and are typically mounted such that the piston rod can slide relative to the rod probe of the reluctance linear displacement sensor.
  • other known sensors such as Hall sensors can be used for the displacement sensor.
  • the concrete pumping apparatus described above may be, for example, a concrete pump truck equipped with a concrete pump, a concrete pump, or the like.
  • the present invention provides a pumping stroke control method for a concrete pump and a concrete pumping device which can be based on predetermined types of material parameters of the concrete (for example, viscosity or slump) ), to adjust the pumping stroke of the concrete pump adaptively, so that the concrete conveying cylinder effectively avoids the phenomenon of insufficient suction, thereby improving the pumping suction efficiency and saving energy.
  • the invention realizes the stepless adjustment of the pumping stroke of the concrete pump, so that the concrete pump achieves the ideal suction efficiency under a relatively ideal pumping stroke for the concrete of different material conditions.
  • the concrete pumping device of the present invention has a simple structure, is convenient to operate, is low in cost, and can significantly prolong the life of the concrete piston by effectively reducing the ineffective stroke of the concrete piston.
  • the pumping stroke control method of the viscous material two-cylinder pump of the present invention and the viscous material pumping apparatus for realizing the method are mainly described above by taking a concrete pump as an example, the viscous material double cylinder of the present invention
  • the pumping stroke control method of the pump and the viscous material pumping equipment for realizing the method are obviously not limited to the pumping stroke control method of the concrete pump and the concrete pumping equipment, but can be universally applied to the viscous material.
  • the control of the pumping stroke of a two-cylinder pump such as the pumping stroke of a two-cylinder pump such as mud, mortar, etc., particularly forms a pumping device for conveying other viscous materials.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

La présente invention concerne un procédé de commande de course de pompe destiné à une pompe à deux cylindres pour matières visqueuses, qui consiste : premièrement, à déterminer, en fonction de paramètres d'état prédéterminés d'une matière visqueuse à transporter, une course de pompe cible pour une pompe à deux cylindres pour matières visqueuses correspondant auxdits paramètres ; ensuite, par régulation du volume d'huile hydraulique dans une cavité traversante (5) de la pompe à deux cylindres pour matières visqueuses, à régler la course de pompe réelle (L) de ladite pompe sur ladite course de pompe cible. L'invention concerne aussi un dispositif de pompage pour matières visqueuses. Le procédé de commande de course de pompe selon l'invention permet une mise en place efficace d'une régulation continue de la course de pompe de pompes à deux cylindres pour matières visqueuses, ce qui permet d'éviter au cylindre de transport de matière de se trouver dans une situation d'absorption de matière insuffisante, et ainsi d'augmenter l'efficacité d'absorption de matière de la pompe tout en économisant de l'énergie. Le dispositif de pompage est de structure simple, facile à faire fonctionner et, grâce à la diminution du nombre de courses invalides du piston de transport, permet de prolonger sa propre durée de vie.
PCT/CN2012/086121 2012-06-27 2012-12-07 Procédé de commande de la course de pompe d'une pompe à deux cylindres pour matière visqueuse et dispositif de pompage à cet effet WO2014000389A1 (fr)

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CN201210214542.XA CN103114983B (zh) 2012-06-27 2012-06-27 粘稠物料双缸泵的泵送行程控制方法及粘稠物料泵送设备

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IT201900007779A1 (it) * 2019-05-31 2020-12-01 Corob Spa Metodo di controllo della dispensazione di prodotti fluidi

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CN103591006B (zh) * 2013-11-18 2015-08-12 中联重科股份有限公司 一种泵送行程优化控制方法、系统和工程机械
CN103670995B (zh) * 2013-12-05 2017-01-11 中联重科股份有限公司 混凝土泵送系统及控制装置、控制方法
CN104454483B (zh) * 2014-11-20 2016-04-20 徐州徐工施维英机械有限公司 负载粘稠度的控制方法和控制系统、以及泵送设备
CN104564634B (zh) * 2014-11-20 2016-06-08 徐州徐工施维英机械有限公司 泵送次数的控制方法和控制系统、以及泵送设备
CN108469512A (zh) * 2018-04-16 2018-08-31 湖南工业职业技术学院 泵送阻力测试系统及方法
CN111622915B (zh) * 2020-06-22 2021-09-24 苏州维斯勒姆智能科技有限公司 扁平直连混凝土超高压输送泵
CN111594406B (zh) * 2020-06-23 2021-02-19 胡小青 粘稠物料行程受控的双缸泵送装置

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