CN102777364B - Pumping mechanism and control method thereof as well as concrete pumping equipment - Google Patents
Pumping mechanism and control method thereof as well as concrete pumping equipment Download PDFInfo
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- CN102777364B CN102777364B CN 201210273378 CN201210273378A CN102777364B CN 102777364 B CN102777364 B CN 102777364B CN 201210273378 CN201210273378 CN 201210273378 CN 201210273378 A CN201210273378 A CN 201210273378A CN 102777364 B CN102777364 B CN 102777364B
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- cylinder
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- selector valve
- piston rod
- predetermined stroke
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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
- F04B9/103—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 only one pumping chamber
- F04B9/105—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 only one pumping chamber reciprocating movement of the pumping member being obtained by a double-acting 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
Abstract
The invention discloses a pumping mechanism which comprises a pumping cylinder (1), a swinging cylinder (2), a first reversing valve (3), a second reversing valve (4), a main pump (5) and a swinging pump (6), wherein the main pump (5) is used for driving the pumping cylinder (1) and controlling the movement direction of the pumping cylinder (1) through the first reversing valve (3); and the swinging pump (6) is used for driving the swinging cylinder (2) and controlling the movement direction of the swinging pump (2) through the second reversing valve (4). The pumping mechanism further comprises a controller (7), wherein the controller (7) is used for transmitting a reversing signal to the first reversing valve (3) and the second reversing valve (4) and/or transmitting an output quantity change signal to the main pump (5) according to movement strokes of the piston rod of the pumping cylinder (1) and/or the piston rod of the swinging cylinder (2). The invention also provides concrete pumping equipment with the pumping mechanism and a corresponding pumping mechanism control method. The pumping mechanism has the advantages that operation is convenient and working efficiency is high.
Description
Technical field
The present invention relates to pumping mechanism, such as concrete pumping mechanism, mud pumping mechanism etc. the invention still further relates to a kind of controlling method of pumping mechanism, the invention still further relates to a kind of concrete pumping equipment with this pumping mechanism.
Background technique
Pumping mechanism (for example concrete pumping equipment) is a kind of equipment of extensive use in the engineering machinery, can be used for the structural material of the thickness states such as pump concrete, mud.Take concrete pumping equipment as example, usually can comprise two pumping cylinders, two concrete cylinders, two swing cylinders, distributing valve (for example S valve), the first selector valve, the second selector valve, main pump and semirotary pumps.Two pumping cylinders can be connected mutually, and main pump drives these two pumping cylinders and controls the moving direction of pumping cylinder by the first selector valve.Two pumping cylinders then drive respectively two concrete cylinders.Two swing cylinders can link mutually, and semirotary pump drives these two swing cylinders and controls the moving direction of two swing cylinders by the second selector valve.The motion of two swing cylinders drives distributing valve and swings.
The working procedure of concrete pumping equipment is, draws concrete by the concrete cylinder from hopper, then by delivery pipe with concreting to the working position.More particularly, the piston rod of concrete cylinder drives and to-and-fro motion by the pumping cylinder, the to-and-fro motion of the piston rod of swing cylinder then drives the distributing valve reciprocally swinging, coordination by distributing valve and concrete cylinder, so that distributing valve alternately is communicated with one of them concrete cylinder with delivery pipe, and another concrete cylinder is communicated with hopper, thereby realizes concrete approximately continuous flowing in conveyance conduit.
The coordination of distributing valve and concrete cylinder can be by controlling the first selector valve and the second selector valve is realized.And, in order to reduce the impact of pumping oil cylinder, usually also need to control simultaneously the discharge capacity of main pump.In existing pumping mechanism, usually on the precalculated position of the cylinder body of two pumping cylinders, approach switch is installed respectively, when the piston rod of pumping cylinder passes through approach switch, approach switch sends a signal to control unit, after control unit receives this signal, signal to main pump with the fixed logic order, the first selector valve and the second selector valve, that is to say, the interval scheduled time (for example t1) sends to main pump falls the discharge capacity signal, the interval scheduled time (for example t2) sends commutation signal for the first selector valve, and the interval scheduled time (for example t3) sends commutation signal for the second selector valve.The t1 value is usually little than t2 value and t3 value, thereby thereby make first main pump reduce the movement velocity that discharge capacity reduces the piston rod of pumping cylinder, after the movement velocity of the piston rod of pumping cylinder is reduced to predeterminated level, again so that the first selector valve and the commutation of the second selector valve, thereby reduce impact to the pumping cylinder.
In above-mentioned prior art, because the position of the installation approach switch of the cylinder body of two pumping cylinders all fixes, therefore give main pump, the first selector valve relative fixing with the trigger point that the second selector valve transmits control signal.But in practice, because the range of two pumping cylinders of pumping mechanism may need to regulate according to concrete job requirements, therefore need to correspondingly regulate the trigger point that transmits control signal to main pump, the first selector valve and the second selector valve.In above-mentioned prior art, can only regulate by the mounting point that changes approach switch, thereby need the dismounting approach switch, cause inconvenient operation, working efficiency is lower.
Summary of the invention
The purpose of this invention is to provide a kind of easy to operate, pumping mechanism that working efficiency is higher, and a kind of controlling method of corresponding pumping mechanism is provided.
To achieve these goals, on the one hand, the invention provides a kind of pumping mechanism, this pumping mechanism comprises the pumping cylinder, swing cylinder, the first selector valve, the second selector valve, main pump and semirotary pump, described main pump drives described pumping cylinder and controls the moving direction of described pumping cylinder by described the first selector valve, described semirotary pump drives described swing cylinder and controls the moving direction of described swing cylinder by described the second selector valve, wherein, this pumping mechanism also comprises controller, this controller is according to the movement travel of the piston rod of the piston rod of described pumping cylinder and/or described swing cylinder, sends commutation signal and/or sends to described main pump and to become the discharge capacity signal to described the first selector valve and the second selector valve.
On the other hand, the present invention also provides a kind of concrete pumping equipment, and this concrete pumping equipment comprises pumping mechanism as indicated above.
Also on the other hand, the present invention also provides a kind of controlling method of pumping mechanism, described pumping mechanism comprises the pumping cylinder, swing cylinder, the first selector valve, the second selector valve, main pump and semirotary pump, described main pump drives described pumping cylinder and controls the moving direction of described pumping cylinder by described the first selector valve, described semirotary pump drives described swing cylinder and controls the moving direction of described swing cylinder by described the second selector valve, wherein, described controlling method comprises the control step: according to the movement travel of the piston rod of the piston rod of described pumping cylinder and/or described swing cylinder, control the commutation of described the first selector valve and the second selector valve and/or control described main pump and change discharge capacity.
Pass through technique scheme, because pumping mechanism also comprises controller, this controller is according to the movement travel of the piston rod of the piston rod of described pumping cylinder and/or described swing cylinder, send commutation signal and/or send to described main pump and to become the discharge capacity signal to described the first selector valve and the second selector valve, regulate to main pump if therefore need, during the position of the trigger point that the first selector valve and the second selector valve transmit control signal, the predetermined stroke that only need correspondingly change the piston rod of the piston rod of the pumping cylinder that arranges in the controller and/or described swing cylinder gets final product, need not the dismounting approach switch fully, therefore easy to operate, working efficiency is higher.
Other features and advantages of the present invention will partly be described in detail in embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide a further understanding of the present invention, and consists of the part of specification, is used from explanation the present invention with following embodiment one, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural representation according to the pumping mechanism of one embodiment of the present invention;
Fig. 2 is the control principle schematic diagram according to the pumping mechanism of one embodiment of the present invention;
Fig. 3 is the more specifically control principle schematic diagram of pumping mechanism as shown in Figure 2;
Fig. 4 is the control principle schematic diagram of the controller of pumping mechanism as shown in Figure 2.
Description of reference numerals
1 pumping cylinder; 2 swing cylinders;
3 first selector valves; 4 second selector valves;
5 main pumps; 6 semirotary pumps;
7 controllers; 8 first sensors;
9 second sensors; 10 concrete cylinders;
11 distributing valves.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only is used for description and interpretation the present invention, is not limited to the present invention.
On the one hand, the invention provides a kind of pumping mechanism.As shown in Figure 1, according to a kind of pumping cylinder 1 that comprises of the present invention, swing cylinder 2, the first selector valve 3, the second selector valve 4, main pump 5 and semirotary pump 6, described main pump 5 drives described pumping cylinder 1 and controls the moving direction of described pumping cylinder 1 by described the first selector valve 3, described semirotary pump 6 drives described swing cylinder 2 and controls the moving direction of described swing cylinder 2 by described the second selector valve 4, wherein, this pumping mechanism also comprises controller 7, this controller 7 is according to the movement travel of the piston rod of the piston rod of described pumping cylinder 1 and/or described swing cylinder 2, sends commutation signal (i for example to described the first selector valve 3 and the second selector valve 4
2And i
3) and/or send to described main pump 5 and to become discharge capacity signals (i for example
1).
As shown in Figure 1, the piston rod of pumping cylinder 1 is connected with the piston rod of concrete cylinder 10, to drive the piston rod to-and-fro motion of concrete cylinder 10.The piston rod of swing cylinder 2 is connected with distributing valve 11 by transmission shaft, swings to drive distributing valve 11.In mode of execution shown in Figure 1, pumping mechanism comprises two pumping cylinders 1, two concrete cylinders 10, two swing cylinders 2.Two pumping cylinders 1 are connected mutually, the piston rod interlock of two swing cylinders 2.But pumping mechanism of the present invention is not limited to above-mentioned concrete structure, and the number of pumping cylinder 1, concrete cylinder 10, swing cylinder 2 can suitably change.Also show water tank 12 and hopper 13 in Fig. 1, its concrete structure and annexation are well known in the art, do not repeat them here.
Pass through technique scheme, because pumping mechanism also comprises controller 7, this controller 7 is according to the movement travel of the piston rod of the piston rod of described pumping cylinder 1 and/or described swing cylinder 2, send commutation signal and/or send to described main pump 5 and to become the discharge capacity signals to described the first selector valve 3 and the second selector valve 4, regulate to main pump 5 if therefore need, during the position of the trigger point that the first selector valve 3 and the second selector valve 4 transmit control signal, the predetermined stroke that only need correspondingly change the piston rod of the piston rod of the pumping cylinder 1 that arranges in the controller 7 and/or described swing cylinder 2 gets final product, need not the dismounting approach switch fully, therefore easy to operate, working efficiency is higher.
Preferably, as shown in Figure 3, when the movement travel of the piston rod of described pumping cylinder 1 reached the first predetermined stroke L1, described controller 7 sent commutation signal i to described the first selector valve 3
2When the movement travel of the piston rod of described pumping cylinder 1 reached the second predetermined stroke L2, described controller 7 sent commutation signal i to described the second selector valve 4
3, described the second predetermined stroke L2 than described the first predetermined stroke L1 more near the end of travel of the moving direction of the piston rod of described pumping cylinder 1.This commutation signal i
2And i
3Can determine according to the concrete form of the first selector valve 2 and the second selector valve 3 and the concrete pumping mode of pumping mechanism.For example as a kind of concrete mode of execution, described the first selector valve 3 is the three-position electromagnetic selector valve, when the movement travel of the piston rod of described pumping cylinder 1 reached described the first predetermined stroke L1, described controller 7 sent so that the both sides electromagnet of described the first selector valve 3 commutation signal i of dead electricity all to described the first selector valve 3
2, that is to say, so that the first selector valve 3 is in meta, thereby main pump 5 stops to drive pumping cylinder 1.As a kind of concrete mode of execution, described the second selector valve 4 is the three-position electromagnetic selector valve, when the movement travel of the piston rod of described pumping cylinder 1 reached described the second predetermined stroke L2, described controller 7 sent so that the different opposite side electromagnet with getting an electric side electromagnet last time of described the second selector valve 4 gets electric commutation signal i to described the second selector valve 4
3That is to say, get electric (being positioned at left position) if 4 last times of the second selector valve are left side electromagnet, then now just so that the right side electromagnet of the second selector valve 4 gets electric (being positioned at right position), vice versa, thereby so that the piston rod to-and-fro motion of swing cylinder 2, thereby so that distributing valve 11 reciprocally swingings.Described the first predetermined stroke L1 can determine according to actual needs, is generally the value close to end of travel, sends commutation signal in order to be reduced to when approaching zero in the movement velocity of the piston rod of pumping cylinder 1 to the first selector valve 3.Simultaneously, the second predetermined stroke L2 also can determine according to actual needs, usually than the first predetermined stroke L2 more near the end of travel of the moving direction of the piston rod of pumping cylinder 1, (the trip is poor very little for progressive error between the first predetermined stroke L1 and the second predetermined stroke L2, for example can be several millimeters) can so that the second selector valve 4 after the commutation of the first selector valve 3 puts in place, commutate again, affect the commutation of the second selector valve 4 with the pressure surge of avoiding during 3 commutations of the first selector valve, causing, thereby farthest reduce the impact to pumping cylinder 1, simultaneously so that distributing valve 11 can be in material (for example concrete) switch operating position under the immobilising state almost.
Can adopt various suitable modes to determine the movement travel of the piston rod of described pumping cylinder 1.Preferably, as depicted in figs. 1 and 2, pumping mechanism comprises that also for the first sensor 8 that detects in real time the stroke of described pumping cylinder 1, described controller 7 is according to the stroke signal i of the described first sensor 8 real-time described pumping cylinders 1 that detect
4Determine the movement travel of the piston rod of described pumping cylinder 1.
Preferably, when the piston rod of described swing cylinder 2 arrived the 3rd predetermined stroke L3, described controller 7 sent commutation signal i to described the first selector valve 3
2This commutation signal i
2Can determine according to the concrete form of the first selector valve 2 and the concrete pumping mode of pumping mechanism.For example as a kind of concrete mode of execution, described the first selector valve 3 is the three-position electromagnetic selector valve, when the piston rod of described swing cylinder 2 arrived the 3rd predetermined stroke L3, described controller 7 sent so that the different opposite side electromagnet with getting an electric side electromagnet last time of described the first selector valve 3 gets electric commutation signal to described the first selector valve 3.That is to say, get current potential in left position if 3 last times of the first selector valve are left side electromagnet, then now just so that the right side electromagnet of the first selector valve 3 gets current potential in right position, vice versa, thus so that the piston rod to-and-fro motion of pumping cylinder 1.
As indicated above, so that before the first selector valve 3 and the commutation of the second selector valve 4, usually reduce first the discharge capacity of main pump 5, in order to reduce the movement velocity of the piston rod of pumping cylinder 1, thereby so that the piston rod of pumping cylinder 1 can reduce movement velocity gradually, reduce the impact to pumping cylinder 1.Therefore preferably, as shown in Figures 2 and 3, when the movement travel of the piston rod of described pumping cylinder 1 arrived the 4th predetermined stroke L4, described controller 7 sent the signal i that reduces discharge capacities to described main pump 5
1, described the 4th predetermined stroke L4 is than the end of travel of described the first predetermined stroke L1 further from the moving direction of the piston rod of described pumping cylinder 1.Can as required so that main pump 5 reduces discharge capacity according to predetermined curve, so that the movement velocity of the piston rod of main pump pumping cylinder 1 reduces gradually by corresponding predetermined curve, reduce the impact to pumping cylinder 1.
Can adopt various suitable modes to determine the movement travel of the piston rod of swing cylinder 2, preferably, as shown in Figures 2 and 3, pumping mechanism also comprises the second sensor 9 that detects the stroke of described swing cylinder 2 for real-time, and described controller 7 is according to the stroke signal i of described the second sensor 9 real-time described swing cylinders 2 that detect
5Determine the movement travel of the piston rod of described swing cylinder 2.
As indicated above, the second sensor 9 is used for detecting in real time the stroke of two swing cylinders 2, and owing to the piston rod of two swing cylinders 2 interconnects, therefore the piston rod of two swing cylinders 2 is synchronized with the movement, therefore can adopt same the second sensor 9 to detect in real time the stroke of two swing cylinders 2, thereby save cost.And in order to improve testing precision, as depicted in figs. 1 and 2, also can adopt two the second sensors 9 to come to detect in real time respectively the stroke of two swing cylinders 2.
Above-mentioned first sensor 8 and the second sensor 9 can adopt the various sensor that can detect in real time the stroke of master cylinder (such as the pumping cylinder 1 among the present invention and swing cylinder 2) well known in the art, for example can adopt displacement transducer.And first sensor 8 and the second sensor 9 can be installed on pumping cylinder 1 and the swing cylinder 2 by various suitable modes, do not repeat them here.
The movement travel at the piston rod place of the piston rod of described pumping cylinder 1 and/or described swing cylinder 2 in the time of can determining that described the first selector valve 3, the second selector valve 4 or main pump 5 transmit control signal according to operating mode, this can finish by manual operation.Yet preferably, as shown in Figure 3, described controller 7 also comprises experts database, the movement travel at the piston rod place of the piston rod of described pumping cylinder 1 and/or described swing cylinder 2 when this experts database is used for that described controller 7 transmits control signal to described the first selector valve 3, the second selector valve 4 or main pump 5 under the storage various working.Thereby can realize the automatic control of pumping mechanism.The occurrence of these predetermined stroke can be empirical value, can be by test or emulation, under various simulated conditions (comprising rate of pumping, pumping pressure etc.), rationally regulate the value of each predetermined stroke L1, L2, L3, L4 and L5, make ride quality reach optimum, the value of L1, L2, L3, L4 and L5 corresponding under each simulated condition and this operating mode is stored in the experts database.Certainly, the 3rd predetermined stroke L3 and the 4th predetermined stroke L4 also can determine by the design runlength of pumping cylinder 1 and swing cylinder 2, need not to be pre-stored in the experts database.The operating mode of pumping mechanism can comprise the induced pressure of pumping mechanism, desired rate of pumping (pumping gear) etc.
More specifically, described controller 7 can also comprise: the working condition acquiring unit that is used for gathering current working information; And the Conditions Matching unit, this Conditions Matching unit is used for the work information that collects according to described working condition acquiring unit, finds out the movement travel when transmitting control signal with described work information is immediate from described experts database.
More preferably, described controller 7 also comprises: the ride quality detection unit, this ride quality detection unit is for detection of the ride quality of described pumping mechanism, and the signal that will represent this ride quality sends to described controller 7, movement travel when described controller 7 transmits control signal according to the Signal Regulation of this representative ride quality is described is to optimize described ride quality.Because the complexity of actual conditions and the finiteness of test or emulated data, canned data possibly can't cover all operating modes in the experts database, this empirical value can't guarantee that ride quality is optimum, so the empirical value of experts database storage can just be used for providing initial value when actual pumpdown.Movement travel when controller 7 can represent described the transmitting control signal of Signal Regulation of ride quality according to this is to optimize described ride quality.
Can represent according to the actual conditions selection parameter of the ride quality of pumping mechanism, for example, described ride quality can comprise: whether the piston the commutation whether hydraulic system of described pumping mechanism exists the piston of compression shock, described pumping cylinder 1 whether to hit cylinder or pumping cylinder 1 not in place, described mates with the piston commutation of described swing cylinder 2.The judgment mode of these performances is well known in the art, does not repeat them here.
Movement travel when controller 7 transmits control signal according to the Signal Regulation that represents ride quality is described, this concrete regulative mode for example can for: when there was compression shock in the hydraulic system that detects described pumping mechanism when described ride quality detection unit, described controller 7 was regulated described the second predetermined stroke L2; For example, when there is compression shock in the hydraulic system of pumping mechanism, then increase the second predetermined stroke L2, in order to postpone 4 commutations of the second selector valve, reduce the compression shock of hydraulic system; When there is not compression shock in the hydraulic system of pumping mechanism, then suitably reduce the second predetermined stroke L2, in order to make in advance 4 commutations of the second selector valve, improve the pumping efficiency of pumping mechanism.The piston that detects described pumping cylinder 1 when described ride quality detection unit hits cylinder or when not in place, described controller 7 is regulated described the first predetermined stroke L1; For example, when the piston of pumping cylinder 1 hits cylinder, then reduce the first predetermined stroke L1, in order to make in advance 3 times metas of the first selector valve, the possibility that the piston of minimizing pumping cylinder 1 hits cylinder; When the piston of pumping cylinder 1 is not in place, then increase the first predetermined stroke L1, in order to postpone to make 3 times metas of the first selector valve, reduce the piston possibility not in place of pumping cylinder 1.When the piston commutation that detects described pumping cylinder 1 when described ride quality detection unit was not mated with the piston commutation of described swing cylinder 2, described controller 7 was regulated described the 5th predetermined stroke L5.Whether the commutation of the piston of pumping cylinder 1 and the piston commutation of described swing cylinder 2 do not mate the swing that embodied distributing valve 11 and whether the commutation of concrete cylinder 10 mates, and this for example can judge by the time difference that swings between the time point that bit time point and concrete cylinder 10 begin to build pressure of distributing valve 11.In the situation that optimum, the time point that concrete cylinder 10 begins to build pressure slightly lags behind distributing valve 11 and swings the time point that puts in place, but should the time difference the smaller the better.Therefore, lag behind distributing valve 11 and swing the time point that puts in place if concrete cylinder 10 begins to build the time point of pressure, but the time difference is too large, then reduces the 5th predetermined stroke L5, begins to build pressure to make in advance concrete cylinder 10; Swing the time point that puts in place if concrete cylinder 10 begins to build the time point of pressure prior to distributing valve 11, then increase the 5th predetermined stroke L5, to postpone making concrete cylinder 10 begin to build pressure.Certainly, this regulative mode is not unique, when there was compression shock in the hydraulic system that for example detects described pumping mechanism when described ride quality detection unit, controller 7 also can be by regulating the first predetermined stroke L1 and/or the 5th predetermined stroke L5 is optimized, and other situations are also similar.
More preferably, described controller 7 also comprises updating block, and movement travel L1, L2, L3, L4 and L5 when this updating block is used for described the transmitting control signal after current working information and the adjusting are updated to described experts database.Thereby save follow-up adjustment process, improve pumping efficiency and the ride quality of pumping mechanism.
On the other hand, the present invention also provides a kind of pump concrete pumping equipment, and this concrete pumping equipment comprises pumping mechanism as indicated above.
Also on the other hand, the invention provides a kind of controlling method of pumping mechanism, described pumping mechanism comprises pumping cylinder 1, swing cylinder 2, the first selector valve 3, the second selector valve 4, main pump 5 and semirotary pump 6, described main pump 5 drives described pumping cylinder 1 and controls the moving direction of described pumping cylinder 1 by described the first selector valve 3, described semirotary pump 6 drives described swing cylinder 2 and controls the moving direction of described swing cylinder 2 by described the second selector valve 4, wherein, described controlling method comprises the control step: according to the movement travel of the piston rod of the piston rod of described pumping cylinder l and/or described swing cylinder 2, control described the first selector valve 3 and 4 commutations of the second selector valve and/or control described main pump 5 and change discharge capacities.
Pass through technique scheme, because in the control step, movement travel according to the piston rod of the piston rod of described pumping cylinder 1 and/or described swing cylinder 2, control described the first selector valve 3 and the commutation of the second selector valve 4 and/or control described main pump 5 and change discharge capacities, if during the travel position when therefore needing to regulate control main pump 5, the first selector valve 3 and the second selector valve 4, need not the dismounting approach switch, therefore easy to operate, working efficiency is higher.
Preferably, in described control step, when the movement travel of the piston rod of described pumping cylinder 1 reaches the first predetermined stroke L1, make 3 commutations of described the first selector valve.In described control step, when the movement travel of the piston rod of described pumping cylinder 1 reaches the second predetermined stroke L2, make described the second selector valve 4 commutation, described the second predetermined stroke L2 than described the first predetermined stroke L1 more near the end of travel of the moving direction of the piston rod of described pumping cylinder 1.This reversing mode can be determined according to the concrete form of the first selector valve 2 and the second selector valve 3 and the concrete pumping mode of pumping mechanism.For example as a kind of concrete mode of execution, described the first selector valve 3 is the three-position electromagnetic selector valve, when the movement travel of the piston rod of described pumping cylinder 1 reached described the first predetermined stroke L1, so that the first selector valve 3 is in meta, thereby main pump 5 stopped to drive pumping cylinder 1.As a kind of concrete mode of execution, described the second selector valve 4 is the three-position electromagnetic selector valve, when the movement travel of the piston rod of described pumping cylinder 1 reaches described the second predetermined stroke L2, can be so that the different opposite side electromagnet with getting an electric side electromagnet last time of described the second selector valve 4 gets electric.That is to say, get electric (being positioned at left position) if 4 last times of the second selector valve are left side electromagnet, then now just so that the right side electromagnet of the second selector valve 4 gets electric (being positioned at right position), vice versa, thereby so that the piston rod to-and-fro motion of swing cylinder 2, thereby so that distributing valve 11 reciprocally swingings.Described the first predetermined stroke L1 can determine according to actual needs, is generally the value close to end of travel, sends commutation signal in order to be reduced to when approaching zero in the movement velocity of the piston rod of pumping cylinder 1 to the first selector valve 3.Simultaneously, the second predetermined stroke L2 also can determine according to actual needs, usually than the first predetermined stroke L2 more near the end of travel of the moving direction of the piston rod of pumping cylinder 1, (the trip is poor very little for progressive error between the first predetermined stroke L1 and the second predetermined stroke L2, for example can be several millimeters) can so that the second selector valve 4 after the commutation of the first selector valve 3 puts in place, commutate again, affect the commutation of the second selector valve 4 with the pressure surge of avoiding during 3 commutations of the first selector valve, causing, thereby farthest reduce the impact to pumping cylinder 1, simultaneously so that distributing valve 11 can be in material (for example concrete) switch operating position under the immobilising state almost.
In described control step, when the piston rod of described swing cylinder 2 arrives the 3rd predetermined stroke L3, so that 3 commutations of described the first selector valve.This reversing mode can be determined according to the concrete form of the first selector valve 2 and the concrete pumping mode of pumping mechanism.For example as a kind of concrete mode of execution, described the first selector valve 3 is the three-position electromagnetic selector valve, when the piston rod of described swing cylinder 2 arrives the 3rd predetermined stroke L3, so that the different opposite side electromagnet with getting an electric side electromagnet last time of described the first selector valve 3 gets electric commutation signal.That is to say, get current potential in left position if 3 last times of the first selector valve are left side electromagnet, then now just so that the right side electromagnet of the first selector valve 3 gets current potential in right position, vice versa, thus so that the piston rod to-and-fro motion of pumping cylinder 1.
As indicated above, so that before the first selector valve 3 and the commutation of the second selector valve 4, usually reduce first the discharge capacity of main pump 5, in order to reduce the movement velocity of the piston rod of pumping cylinder 1, thereby so that the piston rod of pumping cylinder 1 can reduce movement velocity gradually, reduce the impact to pumping cylinder 1.Therefore preferably, as shown in Figures 2 and 3, in described control step, when the movement travel of the piston rod of described pumping cylinder 1 arrives the 4th predetermined stroke L4, so that described main pump 5 reduces discharge capacity, described the 4th predetermined stroke L4 is than the end of travel of described the first predetermined stroke L1 further from the moving direction of the piston rod of described pumping cylinder 1.Can as required so that main pump 5 reduces discharge capacity according to predetermined curve, so that the movement velocity of the piston rod of main pump pumping cylinder 1 reduces gradually by corresponding predetermined curve, reduce the impact to pumping cylinder 1.
Preferably, the method is further comprising the steps of: obtain the movement travel at the piston rod place of the piston rod of described pumping cylinder 1 when transmitting control signal to described the first selector valve 3, the second selector valve 4 or main pump 5 and/or described swing cylinder 2 according to operating mode, the movement travel at the piston rod place of the piston rod of described pumping cylinder 1 and/or described swing cylinder 2 when described experts database is used for that described controller 7 transmits control signal to described the first selector valve 3, the second selector valve 4 or main pump 5 under the storage various working in experts database.Thereby can realize the automatic control of pumping mechanism.The occurrence of these predetermined stroke can be empirical value, can be by test or emulation, under various simulated conditions (comprising rate of pumping, pumping pressure etc.), rationally regulate the value of each predetermined stroke L1, L2, L3, L4 and L5, make ride quality reach optimum, the value of L1, L2, L3, L4 and L5 corresponding under each simulated condition and this operating mode is stored in the experts database.Certainly, the 3rd predetermined stroke L3 and the 4th predetermined stroke L4 also can determine by the design runlength of pumping cylinder 1 and swing cylinder 2, need not to be pre-stored in the experts database.The operating mode of pumping mechanism can comprise the induced pressure of pumping mechanism, desired rate of pumping (pumping gear) etc.
More specifically, this controlling method also comprises: the working condition acquiring step: gather current working information; And Conditions Matching step: according to the work information that described working condition acquiring step collects, from described experts database, find out the movement travel when transmitting control signal with described work information is immediate.
More preferably, this controlling method also comprises the ride quality detecting step: the ride quality that detects described pumping mechanism; In described control step, the movement travel when regulating described transmitting control signal according to this ride quality is to optimize described ride quality.Because the complexity of actual conditions and the finiteness of test or emulated data, canned data possibly can't cover all operating modes in the experts database, this empirical value can't guarantee that ride quality is optimum, so the empirical value of experts database storage can just be used for providing initial value when actual pumpdown.Therefore, the movement travel when regulating described transmitting control signal according to this ride quality can be optimized described ride quality.
Can represent according to the actual conditions selection parameter of the ride quality of pumping mechanism, for example, described ride quality can comprise: whether the piston the commutation whether hydraulic system of described pumping mechanism exists the piston of compression shock, described pumping cylinder 1 whether to hit cylinder or pumping cylinder 1 not in place, described mates with the piston commutation of described swing cylinder 2.The judgment mode of these performances is well known in the art, does not repeat them here.
Movement travel when regulating described transmitting control signal according to ride quality, this concrete regulative mode for example can for: when there is compression shock in the hydraulic system of described pumping mechanism, regulate described the second predetermined stroke L2; For example, when there is compression shock in the hydraulic system of pumping mechanism, then increase the second predetermined stroke L2, in order to postpone 4 commutations of the second selector valve, reduce the compression shock of hydraulic system; When there is not compression shock in the hydraulic system of pumping mechanism, then suitably reduce the second predetermined stroke L2, in order to make in advance 4 commutations of the second selector valve, improve the pumping efficiency of pumping mechanism.When the piston of described pumping cylinder 1 hits cylinder or when not in place, regulates described the first predetermined stroke L1; For example, when the piston of pumping cylinder 1 hits cylinder, then reduce the first predetermined stroke L1, in order to make in advance 3 times metas of the first selector valve, the possibility that the piston of minimizing pumping cylinder 1 hits cylinder; When the piston of pumping cylinder 1 is not in place, then increase the first predetermined stroke L1, in order to postpone to make 3 times metas of the first selector valve, reduce the piston possibility not in place of pumping cylinder 1.When the piston commutation of described pumping cylinder 1 is not mated with the piston commutation of described swing cylinder 2, regulate described the 5th predetermined stroke L5.Whether the commutation of the piston of pumping cylinder 1 and the piston commutation of described swing cylinder 2 do not mate the swing that embodied distributing valve 11 and whether the commutation of concrete cylinder 10 mates, and this for example can judge by the time difference that swings between the time point that bit time point and concrete cylinder 10 begin to build pressure of distributing valve 11.In the situation that optimum, the time point that concrete cylinder 10 begins to build pressure slightly lags behind distributing valve 11 and swings the time point that puts in place, but should the time difference the smaller the better.Therefore, lag behind distributing valve 11 and swing the time point that puts in place if concrete cylinder 10 begins to build the time point of pressure, but the time difference is too large, then reduces the 5th predetermined stroke L5, begins to build pressure to make in advance concrete cylinder 10; Swing the time point that puts in place if concrete cylinder 10 begins to build the time point of pressure prior to distributing valve 11, then increase the 5th predetermined stroke L5, to postpone making concrete cylinder 10 begin to build pressure.Certainly, this regulative mode is not unique, for example when there is compression shock in the hydraulic system that detects described pumping mechanism in the described ride quality detecting step, the control step also can be by regulating the first predetermined stroke L1 and/or the 5th predetermined stroke L5 is optimized, and other situations are also similar.
More preferably, this controlling method also comprises step of updating: movement travel L1, L2, L3, L4 and L5 during with described the transmitting control signal after current working information and the adjusting are updated in the described experts database.Thereby save follow-up adjustment process, improve pumping efficiency and the ride quality of pumping mechanism.
Carry out briefly bright below with reference to Fig. 3 to the total working procedure of pumping mechanism that the preferred embodiment for the present invention provides.At first, the first selector valve 3 is in one of them working position (for example left position), and the second selector valve 4 is in one of them working position (for example left position), thereby the piston rod of the piston rod of pumping cylinder 1 and swing cylinder 2 moves together.When piston rod movement to the four predetermined stroke of pumping cylinder 1, so that main pump 5 reduces discharge capacities, thereby pumping cylinder 1 enters cushion stroke, and the piston rod of pumping cylinder 1 mainly slows down under effect of inertia.When the movement travel of the piston rod that detects pumping cylinder 1 reaches the first predetermined stroke L1, so that the first selector valve 3 is positioned at meta, thus so that the piston rod stop motion of pumping cylinder 1.When the movement travel of the piston rod that detects pumping cylinder 1 reaches the second predetermined stroke L2 (this moment, the first selector valve 3 was finished commutation process substantially), so that the second selector valve 4 commutations (for example switching to right position), thereby so that distributing valve 11 is not having switch operating position under the mobile state of material (for example concrete).When piston rod movement to the three predetermined stroke L3 of swing cylinder 2, make the first selector valve 3 commutations (for example switching to right position), thereby so that the piston rod of pumping cylinder 1 can reversing motion (still because the discharge capacity of main pump 5 is very low at this moment, so the piston rod of pumping cylinder 1 is also almost motionless).Along with the piston rod of swing cylinder 2 enters buffer cavity and retarded motion, when the movement velocity of the piston rod of swing cylinder 2 reaches the 5th predetermined stroke L5, so that pressing predetermined curve, main pump 5 improves discharge capacity, so that system builds and presses and promote the piston rod movement of pumping cylinder 1.Circulate with this, pumping mechanism is poured into the working position with material, and the impact of pumping cylinder is less, the harmony of the motion of pumping cylinder and distributing valve is better, thereby the overall performance of pumping mechanism is better.
Above-mentioned pumping mechanism and controlling method thereof can be applied to various pumping equipments, such as being used for concrete pumping equipment, mud pumping equipment etc.
Below describe by reference to the accompanying drawings preferred implementation of the present invention in detail; but; the present invention is not limited to the detail in the above-mentioned mode of execution; in technical conceive scope of the present invention; can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Need to prove that in addition each the concrete technical characteristics described in above-mentioned embodiment in reconcilable situation, can make up by any suitable mode.For fear of unnecessary repetition, the present invention is to the no longer separately explanation of various possible compound modes.
In addition, also can carry out combination in any between the various mode of execution of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (26)
1. pumping mechanism, this pumping mechanism comprises pumping cylinder (1), swing cylinder (2), the first selector valve (3), the second selector valve (4), main pump (5) and semirotary pump (6), described main pump (5) drives described pumping cylinder (1) and controls the moving direction of described pumping cylinder (1) by described the first selector valve (3), described semirotary pump (6) drives described swing cylinder (2) and controls the moving direction of described swing cylinder (2) by described the second selector valve (4), it is characterized in that, this pumping mechanism also comprises controller (7), this controller (7) is according to the movement travel of the piston rod of the piston rod of described pumping cylinder (1) and/or described swing cylinder (2), send commutation signal and/or send to described main pump (5) and to become the discharge capacity signal to described the first selector valve (3) and the second selector valve (4), and controller also comprises the ride quality detection unit, this ride quality detection unit is for detection of the ride quality of described pumping mechanism, and the signal that will represent this ride quality sends to described controller (7), described controller (7) sends commutation signal and/or sends the movement travel that becomes the discharge capacity signal to described main pump (5) to described the first selector valve (3) and the second selector valve (4) according to this Signal Regulation that represents ride quality, to optimize described ride quality.
2. pumping mechanism according to claim 1 is characterized in that, when the movement travel of the piston rod of described pumping cylinder (1) reached the first predetermined stroke (L1), described controller (7) sent commutation signal to described the first selector valve (3).
3. pumping mechanism according to claim 2, it is characterized in that, described the first selector valve (3) is the three-position electromagnetic selector valve, when the movement travel of the piston rod of described pumping cylinder (1) reached described the first predetermined stroke (L1), described controller (7) sent so that the both sides electromagnet of described the first selector valve (3) commutation signal of dead electricity all to described the first selector valve (3).
4. pumping mechanism according to claim 2, it is characterized in that, when the movement travel of the piston rod of described pumping cylinder (1) reaches the second predetermined stroke (L2), described controller (7) sends commutation signal to described the second selector valve (4), described the second predetermined stroke (L2) than described the first predetermined stroke (L1) more near the end of travel of the moving direction of the piston rod of described pumping cylinder (1).
5. pumping mechanism according to claim 4, it is characterized in that, described the second selector valve (4) is the three-position electromagnetic selector valve, when the movement travel of the piston rod of described pumping cylinder (1) reached described the second predetermined stroke (L2), described controller (7) sent so that the different opposite side electromagnet with getting an electric side electromagnet last time of described the second selector valve (4) gets electric commutation signal to described the second selector valve (4).
6. pumping mechanism according to claim 3 is characterized in that, when the piston rod of described swing cylinder (2) arrived the 3rd predetermined stroke (L3), described controller (7) sent commutation signal to described the first selector valve (3).
7. pumping mechanism according to claim 6, it is characterized in that, described the first selector valve (3) is the three-position electromagnetic selector valve, when the piston rod of described swing cylinder (2) arrived the 3rd predetermined stroke (L3), described controller (7) sent so that the different opposite side electromagnet with getting an electric side electromagnet last time of described the first selector valve (3) gets electric commutation signal to described the first selector valve (3).
8. pumping mechanism according to claim 6, it is characterized in that, when the movement travel of the piston rod of described pumping cylinder (1) arrives the 4th predetermined stroke (L4), described controller (7) sends the signal that reduces discharge capacity to described main pump (5), described the 4th predetermined stroke (L4) is than the end of travel of described the first predetermined stroke (L1) further from the moving direction of the piston rod of described pumping cylinder (1).
9. pumping mechanism according to claim 8, it is characterized in that, when the movement travel of the piston rod of described swing cylinder (2) reaches the 5th predetermined stroke (L5), described controller (7) send to improve the signal of discharge capacity to described main pump (5), described the 5th predetermined stroke (L5) than described the 3rd predetermined stroke (L3) more near the end of travel of the moving direction of the piston rod of described swing cylinder (2).
10. pumping mechanism according to claim 1, it is characterized in that, described controller (7) also comprises experts database, and this experts database is used for described controller (7) under the storage various working to the movement travel at the piston rod place of the piston rod of described the first selector valve (3), the second selector valve (4) or main pump (5) described pumping cylinder (1) when transmitting control signal and/or described swing cylinder (2).
11. pumping mechanism according to claim 10 is characterized in that, described controller (7) also comprises: the working condition acquiring unit that is used for gathering current working information; And the Conditions Matching unit, this Conditions Matching unit is used for the work information that collects according to described working condition acquiring unit, finds out the movement travel when transmitting control signal with described work information is immediate from described experts database.
12. pumping mechanism according to claim 11, it is characterized in that, described ride quality comprises: whether the piston the commutation whether hydraulic system of described pumping mechanism exists the piston of compression shock, described pumping cylinder (1) whether to hit cylinder or pumping cylinder not in place, described (1) mates with the piston commutation of described swing cylinder (2).
13. pumping mechanism according to claim 12 is characterized in that, when the movement travel of the piston rod of described pumping cylinder (1) reached the first predetermined stroke (L1), described controller (7) sent commutation signal to described the first selector valve (3); When the movement travel of the piston rod of described pumping cylinder (1) reaches the second predetermined stroke (L2), described controller (7) sends commutation signal to described the second selector valve (4), described the second predetermined stroke (L2) than described the first predetermined stroke (L1) more near the end of travel of the moving direction of the piston rod of described pumping cylinder (1); When the piston rod of described swing cylinder (2) arrived the 3rd predetermined stroke (L3), described controller (7) sent commutation signal to described the first selector valve (3); When the movement travel of the piston rod of described pumping cylinder (1) arrives the 4th predetermined stroke (L4), described controller (7) sends the signal that reduces discharge capacity to described main pump (5), described the 4th predetermined stroke (L4) is than the end of travel of described the first predetermined stroke (L1) further from the moving direction of the piston rod of described pumping cylinder (1); When the movement travel of the piston rod of described swing cylinder (2) reaches the 5th predetermined stroke (L5), described controller (7) send to improve the signal of discharge capacity to described main pump (5), described the 5th predetermined stroke (L5) than described the 3rd predetermined stroke (L3) more near the end of travel of the moving direction of the piston rod of described swing cylinder (2);
When there was compression shock in the hydraulic system that detects described pumping mechanism when described ride quality detection unit, described controller (7) was regulated described the second predetermined stroke (L2); And/or detect described pumping cylinder (1) when described ride quality detection unit piston hit cylinder or when not in place, described controller (7) is regulated described the first predetermined stroke (L1); And/or detect described pumping cylinder (1) when described ride quality detection unit piston commutation when not mating with the piston commutation of described swing cylinder (2), described controller (7) is regulated described the 5th predetermined stroke (L5).
14. pumping mechanism according to claim 11, it is characterized in that, described controller (7) also comprises updating block, and the movement travel when this updating block is used for described the transmitting control signal after current working information and the adjusting is updated to described experts database.
15. a concrete pumping equipment is characterized in that, this concrete pumping equipment comprises according to claim 1 the described pumping mechanism of any one in 14.
16. the controlling method of a pumping mechanism, described pumping mechanism comprises pumping cylinder (1), swing cylinder (2), the first selector valve (3), the second selector valve (4), main pump (5) and semirotary pump (6), described main pump (5) drives described pumping cylinder (1) and controls the moving direction of described pumping cylinder (1) by described the first selector valve (3), described semirotary pump (6) drives described swing cylinder (2) and controls the moving direction of described swing cylinder (2) by described the second selector valve (4), it is characterized in that, described controlling method comprises the control step: according to the movement travel of the piston rod of the piston rod of described pumping cylinder (1) and/or described swing cylinder (2), control the commutation of described the first selector valve (3) and the second selector valve (4) and/or control described main pump (5) and change discharge capacity; This controlling method also comprises the ride quality detecting step: the ride quality that detects described pumping mechanism; In described control step, regulate control described first selector valve (3) and the second selector valve (4) commutation and/or control the movement travel of described main pump (5) change discharge capacity according to this ride quality, to optimize described ride quality.
17. the controlling method of pumping mechanism according to claim 16 is characterized in that, in described control step, when the movement travel of the piston rod of described pumping cylinder (1) reaches the first predetermined stroke (L1), makes described the first selector valve (3) commutation.
18. the controlling method of pumping mechanism according to claim 17, it is characterized in that, in described control step, when the movement travel of the piston rod of described pumping cylinder (1) reaches the second predetermined stroke (L2), make described the second selector valve (4) commutation, described the second predetermined stroke (L2) than described the first predetermined stroke (L1) more near the end of travel of the moving direction of the piston rod of described pumping cylinder (1).
19. the controlling method of pumping mechanism according to claim 18 is characterized in that, in described control step, when the piston rod of described swing cylinder (2) arrives the 3rd predetermined stroke (L3), so that described the first selector valve (3) commutation.
20. the controlling method of pumping mechanism according to claim 19, it is characterized in that, in described control step, when the movement travel of the piston rod of described pumping cylinder (1) arrives the 4th predetermined stroke (L4), so that described main pump (5) reduces discharge capacity, described the 4th predetermined stroke (L4) is than the end of travel of described the first predetermined stroke (L1) further from the moving direction of the piston rod of described pumping cylinder (1).
21. the controlling method of pumping mechanism according to claim 20, it is characterized in that, in described control step, when the movement travel of the piston rod of described swing cylinder (2) reaches the 5th predetermined stroke (L5), so that described main pump (5) improves discharge capacity, described the 5th predetermined stroke (L5) than described the 3rd predetermined stroke (L3) more near the end of travel of the moving direction of the piston rod of described swing cylinder (2).
22. the controlling method of the described pumping mechanism of any one in 21 according to claim 16, it is characterized in that, the method is further comprising the steps of: obtain in experts database to described the first selector valve (3) according to operating mode, the movement travel at the piston rod of the second selector valve (4) or main pump (5) described pumping cylinder (1) when transmitting control signal and/or the piston rod place of described swing cylinder (2), described experts database are used under the storage various working described controller (7) to described the first selector valve (3), the movement travel at the piston rod of the second selector valve (4) or main pump (5) described pumping cylinder (1) when transmitting control signal and/or the piston rod place of described swing cylinder (2).
23. the controlling method of pumping mechanism according to claim 22 is characterized in that, this controlling method also comprises:
Working condition acquiring step: gather current working information; And
Conditions Matching step: according to the work information that described working condition acquiring step collects, from described experts database, find out the movement travel when transmitting control signal with described work information is immediate.
24. the controlling method of pumping mechanism according to claim 16, it is characterized in that, described ride quality comprises: whether the piston the commutation whether hydraulic system of described pumping mechanism exists the piston of compression shock, described pumping cylinder (1) whether to hit cylinder or pumping cylinder not in place, described (1) mates with the commutation of described swing cylinder (2).
25. the controlling method of pumping mechanism according to claim 21 is characterized in that, in described control step: when there is compression shock in the hydraulic system of described pumping mechanism, regulate described the second predetermined stroke (L2); And/or hit cylinder or when not in place, regulate described the first predetermined stroke (L1) when the piston of described pumping cylinder (1); And/or when the commutation of the piston of described pumping cylinder (1) is not mated with the commutation of described swing cylinder (2), regulate described the 5th predetermined stroke (L5).
26. the controlling method of pumping mechanism according to claim 23 is characterized in that, this controlling method also comprises step of updating: the movement travel during with described the transmitting control signal after current working information and the adjusting is updated in the described experts database.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210273378 CN102777364B (en) | 2012-08-02 | 2012-08-02 | Pumping mechanism and control method thereof as well as concrete pumping equipment |
| PCT/CN2012/086131 WO2014019313A1 (en) | 2012-08-02 | 2012-12-07 | Pumping mechanism and control method therefor, and concrete pumping equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210273378 CN102777364B (en) | 2012-08-02 | 2012-08-02 | Pumping mechanism and control method thereof as well as concrete pumping equipment |
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| CN102777364B true CN102777364B (en) | 2013-10-23 |
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| CN102777364B (en) * | 2012-08-02 | 2013-10-23 | 中联重科股份有限公司 | Pumping mechanism and control method thereof as well as concrete pumping equipment |
| CN103267008B (en) * | 2013-05-13 | 2015-07-01 | 飞翼股份有限公司 | Piston type industrial pump pumping oil cylinder reversing buffer system and control method thereof |
| CN103573728B (en) * | 2013-11-13 | 2017-02-01 | 中联重科股份有限公司 | Device, method and system for controlling hydraulic oil cylinder and engineering machine |
| CN104847645A (en) * | 2014-04-18 | 2015-08-19 | 北汽福田汽车股份有限公司 | Concrete pumping mechanism control method, pumping mechanism control device and engineering machinery |
| CN104847643B (en) * | 2014-12-22 | 2016-08-17 | 北汽福田汽车股份有限公司 | Concrete pumping system reverse control method and corresponding control device for reversing |
| CN104847642B (en) * | 2014-12-22 | 2017-02-01 | 北汽福田汽车股份有限公司 | Control method and control device for concrete pumping |
| CN105060233B (en) * | 2015-07-15 | 2018-09-21 | 广西宏发重工机械有限公司 | A kind of slurry delivery device |
| CN106979184A (en) * | 2017-05-18 | 2017-07-25 | 上海金泰工程机械有限公司 | Isolated underground hydraulic transmission system |
| CN109058085B (en) * | 2018-07-17 | 2020-06-12 | 三一汽车制造有限公司 | Pumping system control method and control device |
| CN110143841A (en) * | 2019-06-20 | 2019-08-20 | 保利民爆哈密有限公司 | A kind of on-site mixed explosive pumping system linkage mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2943022B2 (en) * | 1991-04-12 | 1999-08-30 | 石川島建機株式会社 | Pressure control method for pumping high viscosity fluid pump |
| JPH06288340A (en) * | 1993-04-05 | 1994-10-11 | Ishikawajima Constr Mach Co | Control device for stirrer in viscous fluid hopper |
| JP3143772B2 (en) * | 1995-06-12 | 2001-03-07 | 極東開発工業株式会社 | Control device for concrete pump |
| JP3748954B2 (en) * | 1996-09-06 | 2006-02-22 | 石川島建機株式会社 | Hydraulic control circuit for viscous fluid pump |
| JPH10331762A (en) * | 1997-05-30 | 1998-12-15 | Niigata Eng Co Ltd | Operation method for concrete pump and concrete pump |
| JPH1182312A (en) * | 1997-09-12 | 1999-03-26 | Furukawa Co Ltd | Hydraulically driven piston pump |
| JP3626872B2 (en) * | 1999-04-08 | 2005-03-09 | 三菱重工業株式会社 | Fluid pressure pump and its hydraulic cylinder |
| CN102338134B (en) * | 2011-10-24 | 2013-08-21 | 中联重科股份有限公司 | Concrete pumping equipment and reversing control method for pumping oil cylinder of same |
| CN102434443B (en) * | 2011-12-07 | 2014-01-08 | 中联重科股份有限公司 | Control device, control method and concrete pump for viscous body pumping mechanism |
| CN102777364B (en) * | 2012-08-02 | 2013-10-23 | 中联重科股份有限公司 | Pumping mechanism and control method thereof as well as concrete pumping equipment |
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