CN102705282B - Concrete pumping equipment, and stroke control device and method for series oil cylinders - Google Patents
Concrete pumping equipment, and stroke control device and method for series oil cylinders Download PDFInfo
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- CN102705282B CN102705282B CN201210218468.9A CN201210218468A CN102705282B CN 102705282 B CN102705282 B CN 102705282B CN 201210218468 A CN201210218468 A CN 201210218468A CN 102705282 B CN102705282 B CN 102705282B
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000005086 pumping Methods 0.000 title claims abstract description 18
- 238000001514 detection method Methods 0.000 claims abstract description 29
- 238000011217 control strategy Methods 0.000 claims abstract description 15
- 238000009434 installation Methods 0.000 claims description 6
- 238000011897 real-time detection Methods 0.000 claims description 4
- 230000008901 benefit Effects 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 152
- 230000001276 controlling effect Effects 0.000 description 10
- 239000012530 fluid Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 230000001050 lubricating effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
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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
- 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
- F04B9/1172—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 pump piston in the two directions being obtained by a double-acting piston liquid motor
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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
- 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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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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
- F04B2201/00—Pump parameters
- F04B2201/02—Piston parameters
- F04B2201/0201—Position of the piston
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/22—Synchronisation of the movement of two or more servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
- F15B2211/7114—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators
- F15B2211/7128—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators the chambers being connected in parallel
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Actuator (AREA)
Abstract
The invention provides concrete pumping equipment, and a stroke control device and method for series oil cylinders. This stroke control device of series connection hydro-cylinder includes: the first position detection unit (30) is arranged on the first oil cylinder (10) and is used for detecting a first movement position (X) of the piston (12) in real time and generating a first movement position signal; the second position detection unit (40) is arranged on the second oil cylinder (20) and is used for detecting a second movement position (Y) of the piston (22) in real time and generating a second movement position signal; and the controller (50) is connected with the first position detection unit (30) and the second position detection unit (40), and the controller (50) receives the first movement position signal and the second movement position signal and controls the volume of the communication cavity according to a preset control strategy so as to control the stroke of the series oil cylinder. According to the stroke control device, the problem that the stroke of the oil cylinder cannot be adjusted in time in the prior art can be solved.
Description
Technical field
The present invention relates to oil cylinder control field, more specifically, relate to a kind of concrete pumping equipment, the travel control device of serial oil cylinders and method.
Background technique
As shown in Figure 1, Chinese patent CN 101776107A discloses a kind of travel control device of oil cylinder of contacting.Please refer to Fig. 1, the first oil cylinder 10 and the second oil cylinder 20 are in series arranged, and its rodless cavity is connected to valve 60, and the pressure oil that pump 80 exports enters the rodless cavity of the first oil cylinder 10 or the second oil cylinder 20 by valve 60.The trip control gear uses two proximity switches 30 ' and 40 ' (wherein, this two proximity switches 30 ' and 40 ' stagger certain distance D) formation control region, to detect the stroke of the first oil cylinder 10 and the second oil cylinder 20.By the position relationship (such as: do not reach control area, reach control area and exceed control area) between oil cylinder stroke with control area and two the first oil cylinders 10 of the connecting connected state (comprising rod chamber connected sum rodless cavity to be communicated with) with the communicated cavity of the second oil cylinder 20, judge the fluid volume conditions (comprising very few, suitable, too much) of communicated cavity, to adjust the volume of communicated cavity, thus oil cylinder stroke controlled in control area.
Such as, when the fluid volume of communicated cavity is too much, controller 50 controls to mend oil drain valve 70 and communicated cavity is connected with fuel tank, thus to communicated cavity draining.When the fluid volume of communicated cavity is very few, controller 50 controls to mend oil drain valve 70 and communicated cavity is connected with the pressure oil of system thus to communicated cavity repairing.When the fluid volume of communicated cavity is suitable, controller 50 controls to mend oil drain valve 70 and communicated cavity and the external world is disconnected.
Precision due to the Stroke Control of prior art is ensured by the distance D of proximity switch 30 ' and 40 ', and this distance D can be subject to the impact of alignment error, thus have impact on the precision of Stroke Control, causes the problem of control accuracy instability.In addition, prior art must at previous cylinder movement cycle detection oil cylinder stroke, then at next cycle, stroke is regulated, therefore, can not adjust the stroke of oil cylinder in time, the problem of hitting cylinder because the actual motion stroke of oil cylinder has exceeded predetermined stroke may be there is, the too short and problem of decrease in efficiency of stroke also can occur.
Summary of the invention
The present invention aims to provide a kind of concrete pumping equipment, the travel control device of serial oil cylinders and method, to solve the problem that can not adjust oil cylinder stroke in prior art in time.
For solving the problems of the technologies described above, according to an aspect of the present invention, provide a kind of travel control device of serial oil cylinders, serial oil cylinders comprises the first oil cylinder and second oil cylinder of series connection, the piston of the first oil cylinder and the piston of the second oil cylinder move all between the first position and the second position, distance between the second place and primary importance is setting stroke, the cavity that first oil cylinder and the second oil cylinder are connected mutually is communicated cavity, travel control device comprises: primary importance detection unit, be arranged on the first oil cylinder, for detecting the first movement position of the piston of the first oil cylinder in real time and generating the first movement position signal, second place detection unit, is arranged on the second oil cylinder, for detecting the second movement position of the piston of the second oil cylinder in real time and generating the second movement position signal, controller, is connected with primary importance detection unit and second place detection unit, and controller receives the first movement position signal and the second movement position signal, and controls the volume of communicated cavity to control the stroke of serial oil cylinders according to predetermined control strategy.
Further, the difference of the second place and the first movement position is the first value, and the difference of the second place and the second movement position is the second value, that the first value and second be worth and be traveled distance, and controller calculates the difference setting stroke and traveled distance; Controller controls communicated cavity repairing when difference is greater than zero, and controller controls communicated cavity draining in the minus situation of value difference.
Further, the piston of the first oil cylinder and piston rod offer the first test hole, the piston of the second oil cylinder and piston rod offer the second test hole, primary importance detection unit be located in the first test hole at least partially, being located at least partially in the second test hole of second place detection unit.
Further, travel control device also comprises benefit oil drain valve, is connected with controller, and controller controls to mend oil drain valve to communicated cavity repairing or draining.
According to a further aspect in the invention, provide a kind of concrete pumping equipment, comprise pumping installations, pumping installations comprises serial oil cylinders and the travel control device for controlling serial oil cylinders, and travel control device is any one travel control device above-mentioned.
In accordance with a further aspect of the present invention, provide a kind of stroke control method of serial oil cylinders, serial oil cylinders comprises the first oil cylinder and second oil cylinder of series connection, the piston of the first oil cylinder and the piston of the second oil cylinder move all between the first position and the second position, distance between the second place and primary importance is setting stroke, the cavity that first oil cylinder and the second oil cylinder are connected mutually is communicated cavity, and stroke control method comprises: detect the first movement position of the piston of the first oil cylinder in real time and generate the first movement position signal; Second movement position of the piston of real-time detection second oil cylinder also generates the second movement position signal; Receive the first movement position signal and the second movement position signal, and control the volume of communicated cavity to control the stroke of serial oil cylinders according to predetermined control strategy.
Further, the difference of the second place and the first movement position is the first value, and the difference of the second place and the second movement position is the second value; First value with second be worth and be traveled distance; The volume controlling communicated cavity according to predetermined control strategy comprises with the stroke controlling serial oil cylinders: the difference calculating setting stroke and traveled distance; Control communicated cavity repairing when difference is greater than zero, in the minus situation of value difference, control communicated cavity draining.
Further, stroke control method also comprises the cylinder diameter according to difference, the first oil cylinder and the second oil cylinder, calculates the volume of repairing or draining, and according to the repairing amount of fixing fabric structure reality or oil drain quantity.
Further, stroke control method also comprises according to repairing or the volume of draining and the flow of repairing or draining, calculates the time of repairing or draining, thus controls repairing amount or dredge oil amount.
The real-time position information that the present invention uses piston current, controls in real time to the total volume of the communicated cavity of serial oil cylinders, can accurately control the stroke of oil cylinder in time, avoids and hits cylinder and the too short problem of stroke.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 diagrammatically illustrates the schematic diagram of the travel control device of series winding oil cylinder of the prior art;
Fig. 2 diagrammatically illustrates the schematic diagram of the travel control device of the series winding oil cylinder in one embodiment of the invention;
Fig. 3 diagrammatically illustrates the schematic diagram of the travel control device of the series winding oil cylinder in another embodiment of the present invention; And
Fig. 4 diagrammatically illustrates the control flow schematic diagram of the stroke control method of the series winding oil cylinder in the present invention.
Reference character in figure: 10, the first oil cylinder; 11, piston rod; 12, piston; 13, rodless cavity; 14, rod chamber; 20, the second oil cylinder; 21, piston rod; 22, piston; 23, rodless cavity; 24, rod chamber; 30, primary importance detection unit; 30 ', proximity switch; 40 ', proximity switch; 40, second place detection unit; 50, controller; 60, valve; 70, oil drain valve is mended; 80, pump; 90, pump; 100, distributing mechanism; 110, valve; A, primary importance; B, the second place; D, distance; L1, distance; L2, distance; O, left end; X, the first movement position; Y, the second movement position.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
As a first aspect of the present invention, provide a kind of travel control device of serial oil cylinders.As shown in Figures 2 and 3, serial oil cylinders comprises the first oil cylinder 10 and the second oil cylinder 20 of series connection, the piston 12 of the first oil cylinder 10 and the piston 22 of the second oil cylinder 20 all move between primary importance A and second place B, distance between second place B and primary importance A is setting stroke, and the cavity that the first oil cylinder 10 is connected mutually with the second oil cylinder 20 is communicated cavity.
Travel control device comprises: primary importance detection unit 30, is arranged on the first oil cylinder 10, for detecting the first movement position X of the piston 12 of the first oil cylinder 10 in real time and generating the first movement position signal; Second place detection unit 40, is arranged on the second oil cylinder 20, for detecting the second movement position Y of the piston 22 of the second oil cylinder 20 in real time and generating the second movement position signal; Controller 50, is connected with primary importance detection unit 30 and second place detection unit 40, and controller 50 receives the first movement position signal and the second movement position signal, and controls the volume of communicated cavity to control the stroke of serial oil cylinders according to predetermined control strategy.
Owing to contacting oil cylinder in the course of the work, communicated cavity (be i.e. interconnected two chambeies of the first oil cylinder and the second oil cylinder, such as, rod chamber in Fig. 2 and Fig. 3) fluid volume determine the stroke of cylinder movement, as long as therefore can control the fluid volume of communicated cavity, just energy ground controls the stroke of oil cylinder.
In a preferred embodiment, the difference of second place B and the first movement position X is the first value, the difference of second place B and the second movement position Y is the second value, that the first value and second be worth and be traveled distance, and controller calculates the difference setting stroke and traveled distance; Controller 50 controls communicated cavity repairing when difference is greater than zero, and controller controls communicated cavity draining in the minus situation of value difference.Like this, just establish a kind of control strategy, this control strategy can control the volume of communicated cavity according to the difference setting stroke and traveled distance, to reach the object controlling serial oil cylinders stroke.Obviously, other control strategy can be utilized to control the volume of communicated cavity, such as, utilize the relation of the length sum of the rodless cavity of the first oil cylinder 10 and the second oil cylinder 20 and the total length of the first oil cylinder 10 or the second oil cylinder 20, control the volume of communicated cavity.
Preferably, travel control device also comprises mends oil drain valve 70, is connected with controller 50, and controller 50 controls to mend oil drain valve 70 to communicated cavity repairing or draining.By the operation of repairing or draining, the total volume of the communicated cavity of change first oil cylinder 10 and the second oil cylinder 20 can be made, thus reach the object of adjustment stroke.
Please refer to Fig. 2, the left end of the first oil cylinder 10 and the second oil cylinder 20 is O, and the distance of its primary importance A and left end O is the distance between L1, second place B and left end O is L2.Therefore, the setting stroke S of the first oil cylinder 10 and the second oil cylinder 20 is L2-L1.
Please refer to Fig. 2, the distance (namely first is worth) between piston 12 and second place B is L2-X, and the distance (namely second is worth) between piston 22 and second place B is L2-Y.The traveled distance S0 of the first oil cylinder 10 and the second oil cylinder 20 be the first value and the second value and, i.e. S0=L2-X+L2-Y=2L2-X-Y, so just can use above formula to be configured to the representation of expression traveled distance.Then, obtain by controller 50 the difference DELTA S setting stroke and traveled distance, wherein, Δ S=S-S0.
As Δ S < 0, need by mending oil drain valve 70 to repairing in communicated cavity, thus increase the volume of communicated cavity, to adjust the position of stroke.As Δ S > 0, need by mending oil drain valve 70 to repairing in communicated cavity, thus increase the volume of communicated cavity, to adjust the position of stroke.
Like this, in the process controlled, picture is not needed to utilize the first oil cylinder and the historical position data of the second oil cylinder when the last cycle of motion in the prior art, only need the real-time position information using piston current, the total volume of the communicated cavity of serial oil cylinders is controlled in real time, just can accurately control the stroke of oil cylinder in time, avoid as much as possible and the problem of hitting cylinder that cause long due to stroke or due to stroke too short and cause the problem of decrease in efficiency.In addition, the stroke change that can realize in arbitrary cylinder movement cycle due to the present invention controls, and piston can be moved within each cycle of motion and put in place, thus improve the working life of pumping efficiency and system.
In addition, the position due to the lubricating point on oil cylinder is fixing, if can not the stroke of accurately control piston, just can not ensure that the position that piston can move to lubricating point at every turn accepts lubrication, so that have impact on the working life of piston.The present invention can the stroke of accurately control piston, thus, can ensure that piston can move to lubricating point place at every turn, thus improve the working life of piston.
Preferably, the piston 12 of the first oil cylinder 10 and piston rod 11 offer the first test hole, the piston 22 of the second oil cylinder 20 and piston rod 21 offer the second test hole, primary importance detection unit 30 be located in the first test hole at least partially, being located at least partially in the second test hole of second place detection unit 40.Such as, primary importance detection unit 30 and second place detection unit 40 can be mangneto sensors.The position of the piston of the first oil cylinder 10 and the second oil cylinder 20 can be detected in real time and accurately by primary importance detection unit and second place detection unit.
During work, the pressure oil that pump 80 exports enters the first oil cylinder 10 or the second oil cylinder 20 through valve 60, thus the piston promoting the first oil cylinder 10 or the second oil cylinder 20 is protruding.Such as, when rodless cavity 23 oil-feed of the second oil cylinder 20, the piston of the second oil cylinder 20 stretches out to the right, and the hydraulic oil in its rod chamber 24 flows into the rod chamber 14 of the first oil cylinder 10, thus the piston of the first oil cylinder 10 is shunk left.In the process, controller 50 mends oil drain valve 70 to communicated cavity (rod chamber of the first oil cylinder 10 and the second oil cylinder 20) repairing of the first oil cylinder 10 and the second oil cylinder 20 or draining according to the output control of Δ S, thus adjust stroke in real time, to prevent the problem of hitting cylinder or stroke deficiency.When the piston of the second oil cylinder 20 runs to second place B, controller 50 control valve 60 to rodless cavity 13 fuel feeding of the first oil cylinder 10, thus realizes the commutation of oil cylinder.
As a second aspect of the present invention, provide a kind of concrete pumping equipment (such as concrete mixer etc.), comprise pumping installations, pumping installations comprises serial oil cylinders and the travel control device for controlling serial oil cylinders, and the trip control gear is the travel control device in the various embodiments described above.
Preferably, the pressure oil of benefit oil drain valve 70 can come from any one pump in the hydraulic system of concrete pumping equipment.Such as, in the embodiment shown in Figure 2, the pump 80 of pumping mechanism can be come from.Again such as, in the embodiment shown in fig. 3, other pump such as pump 90 grade of the distributing mechanism 100 of concrete pumping equipment can also be come from.Wherein, pump 90 provides pressure oil by valve 110 to distributing mechanism 100.
On the basis of above-described embodiment, as a third aspect of the present invention, provide a kind of stroke control method of serial oil cylinders.Please refer to Fig. 2 and Fig. 3, serial oil cylinders comprises the first oil cylinder 10 and the second oil cylinder 20 of series connection, the piston 12 of the first oil cylinder 10 and the piston 22 of the second oil cylinder 20 all move between primary importance A and second place B, and the distance between second place B and primary importance A is setting stroke.The cavity that first oil cylinder 10 is connected mutually with the second oil cylinder 20 is communicated cavity.
Please refer to Fig. 4, the trip controlling method comprises: detect the first movement position X of the piston 12 of the first oil cylinder 10 in real time and generate the first movement position signal; Second movement position Y of the piston 12 of real-time detection second oil cylinder 20 also generates the second movement position signal; Receive the first movement position signal and the second movement position signal, and control the volume of communicated cavity to control the stroke of serial oil cylinders according to predetermined control strategy.
The difference of second place B and the first movement position X is the difference of the first value (i.e. L2-X), second place B and the second movement position Y is the second value (i.e. L2-Y); First value with second be worth and be traveled distance S0 (i.e. S0=L2-X+L2-Y=2L2-X-Y).Preferably, the described volume controlling described communicated cavity according to predetermined control strategy comprises with the stroke controlling described serial oil cylinders: the difference DELTA S calculating setting stroke S and traveled distance S0, wherein, and Δ S=S-S0; Control communicated cavity repairing when difference is greater than zero, in the minus situation of value difference, control communicated cavity draining.
Like this, in the process controlled, do not need to resemble and utilize the first oil cylinder and the historical position data of the second oil cylinder when the last cycle of motion in the prior art, only need to use current real-time position information, just can adjust the stroke of oil cylinder in time, avoid as much as possible and the problem of hitting cylinder that cause long due to stroke or due to stroke too short and cause the problem of decrease in efficiency.
As a preferred embodiment, stroke control method also comprises the cylinder diameter according to difference, the first oil cylinder 10 and the second oil cylinder 20, calculates the volume of repairing or draining, and according to the repairing amount of this fixing fabric structure reality or oil drain quantity.
Further, stroke control method also comprises according to repairing or the volume of draining and the flow of repairing or draining, calculates the time of repairing or draining, thus controls repairing amount or dredge oil amount.Like this, by controlling the volume of repairing and draining, just can control the total volume of communicated cavity, thus play the object accurately controlling stroke.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. the travel control device of a serial oil cylinders, described serial oil cylinders comprises the first oil cylinder (10) and second oil cylinder (20) of series connection, the piston (12) of described first oil cylinder (10) and the piston (22) of described second oil cylinder (20) all move between primary importance (A) and the second place (B), distance between the described second place (B) and described primary importance (A) is for set stroke, the cavity that described first oil cylinder (10) is connected mutually with described second oil cylinder (20) is communicated cavity, it is characterized in that, described travel control device comprises:
Primary importance detection unit (30), be arranged on described first oil cylinder (10), for detecting first movement position (X) of the piston (12) of described first oil cylinder (10) in real time and generating the first movement position signal;
Second place detection unit (40), be arranged on described second oil cylinder (20), for detecting second movement position (Y) of the piston (22) of described second oil cylinder (20) in real time and generating the second movement position signal;
Controller (50), be connected with described primary importance detection unit (30) and described second place detection unit (40), described controller (50) receives described first movement position signal and the second movement position signal, and the volume controlling described communicated cavity according to predetermined control strategy is to control the stroke of described serial oil cylinders, this control strategy controls the volume of described communicated cavity, to control described serial oil cylinders stroke according to the difference setting stroke and traveled distance.
2. travel control device according to claim 1, it is characterized in that, the described second place (B) is the first value with the difference of described first movement position (X), the described second place (B) is the second value with the difference of described second movement position (Y), described first value with described second be worth and be traveled distance, described controller calculates the difference of described setting stroke and described traveled distance; Described controller (50) controls described communicated cavity repairing when the difference of described setting stroke and described traveled distance is greater than zero, and described controller controls described communicated cavity draining in the minus situation of difference of described setting stroke and described traveled distance.
3. travel control device according to claim 1, it is characterized in that, the piston (12) of described first oil cylinder (10) and piston rod (11) offer the first test hole, the piston (22) of described second oil cylinder (20) and piston rod (21) offer the second test hole, described primary importance detection unit (30) be located in described first test hole at least partially, being located at least partially in described second test hole of described second place detection unit (40).
4. travel control device according to claim 1, it is characterized in that, described travel control device also comprises mends oil drain valve (70), be connected with described controller (50), described controller (50) controls described benefit oil drain valve (70) to described communicated cavity repairing or draining.
5. a concrete pumping equipment, comprise pumping installations, described pumping installations comprises serial oil cylinders and the travel control device for controlling described serial oil cylinders, it is characterized in that, described travel control device is the travel control device according to any one of Claims 1-4.
6. the stroke control method of a serial oil cylinders, described serial oil cylinders comprises the first oil cylinder (10) and second oil cylinder (20) of series connection, the piston of described first oil cylinder (10) and the piston of described second oil cylinder (20) all move between primary importance (A) and the second place (B), distance between the described second place (B) and described primary importance (A) is for set stroke, the cavity that described first oil cylinder (10) is connected mutually with described second oil cylinder (20) is communicated cavity, it is characterized in that, described stroke control method comprises:
First movement position (X) of the piston (12) of described first oil cylinder (10) of real-time detection also generates the first movement position signal;
Second movement position (Y) of the piston (12) of described second oil cylinder (20) of real-time detection also generates the second movement position signal;
Receive described first movement position signal and the second movement position signal, and the volume controlling described communicated cavity according to predetermined control strategy is to control the stroke of described serial oil cylinders, this control strategy controls the volume of described communicated cavity, to control described serial oil cylinders stroke according to the difference setting stroke and traveled distance.
7. stroke control method according to claim 6, it is characterized in that, the described second place (B) is the first value with the difference of described first movement position (X), and the described second place (B) is the second value with the difference of described second movement position (Y); Described first value with described second be worth and be traveled distance;
The described volume controlling described communicated cavity according to predetermined control strategy comprises with the stroke controlling described serial oil cylinders: the difference calculating described setting stroke and described traveled distance; Control described communicated cavity repairing when the difference of described setting stroke and described traveled distance is greater than zero, in the minus situation of difference of described setting stroke and described traveled distance, control described communicated cavity draining.
8. stroke control method according to claim 7, it is characterized in that, described stroke control method also comprises the cylinder diameter of difference, the first oil cylinder (10) and the second oil cylinder (20) according to described setting stroke and described traveled distance, calculate the volume of repairing or draining, and according to the repairing amount of described fixing fabric structure reality or oil drain quantity.
9. stroke control method according to claim 8, it is characterized in that, described stroke control method also comprises according to described repairing or the volume of draining and the flow of repairing or draining, calculates the time of repairing or draining, thus controls described repairing amount or dredge oil amount.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210218468.9A CN102705282B (en) | 2012-06-28 | 2012-06-28 | Concrete pumping equipment, and stroke control device and method for series oil cylinders |
| PCT/CN2012/085837 WO2014000378A1 (en) | 2012-06-28 | 2012-12-04 | Concrete pumping device, and travel control apparatus and method for series oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102705282B (en) * | 2012-06-28 | 2015-07-15 | 中联重科股份有限公司 | Concrete pumping equipment, and stroke control device and method for series oil cylinders |
| CN103148062B (en) * | 2013-03-19 | 2015-03-25 | 中联重科股份有限公司 | Stroke control system, method and device for series oil cylinders |
| CN103204447A (en) * | 2013-04-03 | 2013-07-17 | 同济大学 | Honeycomb hydraulic thruster |
| CN103573727B (en) * | 2013-11-07 | 2015-10-14 | 中联重科股份有限公司 | Reversing control method and device for series oil cylinders and concrete pumping system |
| CN103573728B (en) * | 2013-11-13 | 2017-02-01 | 中联重科股份有限公司 | Control equipment, method and system of hydraulic oil cylinder and engineering machinery |
| CN103613030B (en) * | 2013-11-26 | 2016-08-24 | 中联重科股份有限公司 | Oil supplementing control method, device and system for hydraulic system of hoisting mechanism and crane |
| CN103670995B (en) * | 2013-12-05 | 2017-01-11 | 中联重科股份有限公司 | Concrete pumping system, control device and control method |
| CN103644174B (en) * | 2013-12-16 | 2016-04-20 | 中联重科股份有限公司 | Stroke control method, device and system for series oil cylinders |
| CN105317788B (en) * | 2014-07-25 | 2017-12-05 | 中联重科股份有限公司 | Concrete pumping equipment, and stroke control system, method and device for series oil cylinders |
| CN105715622B (en) * | 2016-04-25 | 2018-11-20 | 北汽福田汽车股份有限公司 | Engineering machinery and its pumping system |
| CN106122161A (en) * | 2016-08-03 | 2016-11-16 | 广西科晟达机械制造有限公司 | A kind of scalable series connection cylinder |
| CN108916158B (en) * | 2018-07-31 | 2019-10-29 | 烟台未来自动装备有限责任公司 | A kind of oil cylinder stroke Detection & Controling method based on hydraulic oil volume flow |
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| CN102705282A (en) | 2012-10-03 |
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