CN202203191U - Concrete pumping apparatus and hydraulic system thereof - Google Patents
Concrete pumping apparatus and hydraulic system thereof Download PDFInfo
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- CN202203191U CN202203191U CN201120330554XU CN201120330554U CN202203191U CN 202203191 U CN202203191 U CN 202203191U CN 201120330554X U CN201120330554X U CN 201120330554XU CN 201120330554 U CN201120330554 U CN 201120330554U CN 202203191 U CN202203191 U CN 202203191U
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Abstract
The utility model provides a concrete pumping apparatus and a hydraulic system thereof. The hydraulic system comprises a first hydraulic subsystem and a second hydraulic subsystem. The first hydraulic subsystem comprises a first pump and at least one first actuating mechanism; a first multiple directional control valve is disposed between the first pump and the first actuating mechanism and comprises at least one first station and at least one second station; the second hydraulic subsystem comprises a second pump and at least one second actuating mechanism; the second pump drives the at least one second actuating mechanism; the first pump drives the at least one first actuating mechanism through the first station; and the first pump and the second pump drive the at least one second actuating mechanism together through the second station. The operation that the first pump provides pressure oil for the second hydraulic subsystem improves efficiency of the hydraulic system greatly, improves load rate of a concrete pumping apparatus engine, and reduces energy consumption on the one hand, and increases maximum pumping capacity of the concrete pumping apparatus by over 15% on the other hand.
Description
Technical field
The utility model relates to the hydraulic control field, more specifically, relates to a kind of concrete pumping equipment and hydraulic system thereof.
Background technique
The hydraulic system of concrete pumping equipment of the prior art comprises several parts such as pumping subtense angle, assignment subsystem, stirring and washing subtense angle and jib supporting leg subtense angle, and each subtense angle drives at least one different actuators.Following two kinds of forms of the composition commonly used have: a kind of is that the composition of each sub-systems all is independently; Have independent dynamical element (being pump), control unit (like valve etc.), executive component (like oil cylinder, motor etc.) and auxiliary element (like filter etc.) etc.; Each sub-systems can be worked simultaneously; Also can work independently, unaffected each other; Another kind is that the pumping subtense angle adopts identical oil pump with assignment subsystem, but other subtense angles are separated from each other.
The not all in the course of the work hydraulic subsystem of concrete pumping equipment all need be worked simultaneously; When though perhaps all hydraulic subsystems are worked simultaneously; But each subtense angle all is not in the state of operating at full capacity, and therefore, has the phenomenon of the idle waste of system capability.For example in the cloth process; If the cloth point is pillar or flat board, jib and supporting leg just do not need motion so within a certain period of time, cause the oil pump of jib supporting leg hydraulic subsystem just to be in idling conditions; System effectiveness is very low, has the unnecessary ability and the waste of energy.
The model utility content
The utility model aims to provide a kind of concrete pumping equipment and hydraulic system thereof, low with the hydraulic system efficient that solves existing technology, as to have energy and ability waste problem.
For solving the problems of the technologies described above; An aspect according to the utility model provides a kind of hydraulic system, it is characterized in that; Comprise: first hydraulic subsystem; First hydraulic subsystem comprises first pump and at least one first actuator, is provided with first multiple directional control valve between first pump and first actuator, and first multiple directional control valve comprises at least one first station and at least one second station; Second hydraulic subsystem, second hydraulic subsystem comprise second pump and at least one second actuator, and second pump drives at least one second actuator; First pump drives at least one first actuator through first station, and first pump passes through second station with at least one second actuator of the second pump driven in common.
Further, first hydraulic subsystem also comprises second multiple directional control valve, and at least one first actuator is connected with first multiple directional control valve through second multiple directional control valve.
Further, second hydraulic subsystem is connected with first multiple directional control valve through one-way valve or stop valve or selector valve.
Further, first multiple directional control valve comprises a plurality of first valve blocks and a plurality of second valve block, and each first valve block comprises first station and second station, and a part of first actuator is connected with first valve block, and another part first actuator is connected with second valve block.
Further, second hydraulic subsystem is connected with each first valve block through one-way valve or stop valve or selector valve.
Further, hydraulic system also comprises the operating mode adaptive controller, is used for switching to second station and being used to control the size of the aperture of each first valve block from first station according to each first valve block of operating mode control.
Further, when the aggregate demand flow of each first actuator during more than or equal to the output flow of first pump, each first valve block that the operating mode adaptive controller is controlled in first multiple directional control valve is in first station.
Further; When the aggregate demand flow of each first actuator less than the aggregate demand flow of the output flow of first pump and each second actuator during smaller or equal to the output flow of second pump, each first valve block that the operating mode adaptive controller is controlled in first multiple directional control valve is in first station.
Further; When the aggregate demand flow of each first actuator less than the demand volume of the output flow of first pump and at least one second actuator during greater than the output flow of second pump, at least one first valve block that the operating mode adaptive controller is controlled in first multiple directional control valve is in second station.
Another aspect according to the utility model provides a kind of concrete pumping equipment, and it comprises above-mentioned hydraulic system.
Further, first hydraulic subsystem in the hydraulic system is a jib supporting leg hydraulic subsystem, and second hydraulic subsystem in the hydraulic system is the pumps hydraulic subtense angle.
Further, hydraulic system is according to the first multiple directional control valve switching-over of concrete pumping equipment to the rate request controlled hydraulic system of the rate request of its jib and/or pumping.
Concrete pumping equipment in the utility model and hydraulic system thereof can provide pressure oil to second hydraulic subsystem through its first pump, and one side significantly improves hydraulic system efficient, has improved the Rate of load condensate of concrete pumping equipment motor, cuts down the consumption of energy; Make the maximum pumping capacity of concrete pumping equipment improve more than 15% on the other hand.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide the further understanding to the utility model, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:
Fig. 1 has schematically shown the hydraulic schematic diagram of the hydraulic system in first kind of preferred implementation;
Fig. 2 has schematically shown the hydraulic schematic diagram of the hydraulic system in second kind of preferred implementation; And
Fig. 3 has schematically shown the control flow chart of the operating mode adaptive controller in the hydraulic system.
Embodiment
Embodiment to the utility model is elaborated below in conjunction with accompanying drawing, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
The first aspect of the utility model provides a kind of hydraulic system, and this hydraulic system comprises: first hydraulic subsystem and second hydraulic subsystem; Wherein, first hydraulic subsystem comprises first pump and at least one first actuator, is provided with first multiple directional control valve between first pump and at least one first actuator, and first multiple directional control valve comprises at least one first station and at least one second station; Second hydraulic subsystem comprises second pump and at least one second actuator, and second pump drives at least one second actuator; First pump drives at least one first actuator through first station, and first pump passes through second station with at least one second actuator of the second pump driven in common.Therefore; When first multiple directional control valve was in first station, first pump provided pressure oil at least one first actuator, at this moment; At least one first actuator's proper functioning, and at least one second actuator only accepts the pressure oil exported from second pump; When at least one second actuator needs more pressure oil, can first multiple directional control valve be switched to second station, at this moment; First pump provides pressure oil to second actuator; So, obtain second actuator at this moment the pressure oil that first pump and second pump are provided simultaneously, thereby can satisfy the need of work of second actuator; Improve the efficient of hydraulic system, reduced energy consumption.
On the basis of above-mentioned hydraulic system, this hydraulic system is elaborated below in conjunction with two concrete embodiments.
Fig. 1 shows the hydraulic schematic diagram of first kind of above-mentioned hydraulic system under the preferred implementation.As shown in Figure 1, this hydraulic system comprises first hydraulic subsystem and second hydraulic subsystem; Wherein, First hydraulic subsystem comprises first pump 5 and at least one first actuator 6; Be provided with first multiple directional control valve, 1, the first multiple directional control valve 1 between first pump 5 and at least one first actuator 6 and comprise first station (i.e. position, a left side) and second station (promptly right position); Second hydraulic subsystem comprises that second pump 4 and at least one second actuator, 7, the second pump 4 drive at least one second actuator 7; First pump 5 drives at least one first actuator, 6, the first pump 5 through first station and passes through second station with at least one second actuator 7 of second pump, 4 driven in common.Preferably, first hydraulic subsystem also comprises second multiple directional control valve 3, and at least one first actuator 6 is connected with first multiple directional control valve 1 through second multiple directional control valve 3.When first actuator needs work; First multi-way valve 1 is remained on first station; At this moment, the pressure oil of first pump 5 directly gets in first actuator through first multi-way valve 1 and goes, and the pressure oil of second pump directly drives the work of second actuator; Promptly first hydraulic subsystem and second hydraulic subsystem are worked respectively independently, have no influence each other; When all first actuators in first hydraulic subsystem all were in halted state, first actuator 6 no longer needed first pump 5 that pressure oil is provided, at this moment; Can make first multiple directional control valve 1 be operated in second station; The pressure oil of first pump 5 is got in second hydraulic subsystem through first multiple directional control valve 1, and at this moment, first pump 5 and second pump 4 are in the interflow state; Thereby improved hydraulic system, reduced energy consumption.When first multi-way valve 1 is in first station; Those skilled in the art can adopt multiple mode (like one-way valve or stop valve or selector valve) to realize the isolation of first hydraulic subsystem and second hydraulic subsystem; The two is worked respectively independently; Have no influence each other, preferably, can make through one-way valve 2 second hydraulic subsystem is connected with first multiple directional control valve 1; When first multiple directional control valve was in first station, the pressure oil of second hydraulic subsystem can not flow into fuel tank through first multiple directional control valve 1 like this.
At first kind preferably in the mode of execution shown in Figure 1; This hydraulic system only can all first actuators in first hydraulic subsystem all be under the out-of-work situation; First pump 5 provides extra pressure oil could for second hydraulic subsystem, but as a rule, only some first actuator motion at least one first actuator in first hydraulic subsystem; Perhaps the speed of operation is very slow; Therefore, first pump 5 is not in the full load state, promptly still has the waste of system capability this moment.
In order to overcome the deficiency in first kind of preferred implementation shown in Figure 1, the utility model also provides second kind of preferred implementation as shown in Figure 2.As shown in Figure 2, this hydraulic system comprises first hydraulic subsystem and second hydraulic subsystem; Wherein, First hydraulic subsystem comprises first pump 5 and at least one first actuator 6; Be provided with first multiple directional control valve, 1, the first multiple directional control valve 1 between first pump 5 and at least one first actuator 6 and comprise at least one first station (promptly the next) and at least one second station (promptly upper); Second hydraulic subsystem comprises that second pump 4 and at least one second actuator, 7, the second pump 4 drive at least one second actuator 7; First pump 5 drives at least one first actuator 6 through first station; First pump 5 passes through second station with at least one second actuator 7 of second pump, 4 driven in common; Further; First multiple directional control valve 1 has a plurality of first valve blocks 1 ' and a plurality of second valve block (not shown), and each first valve block 1 ' all comprises one first station and one second station, and a part of first actuator 6 all is connected with first valve block 1 '; Another part first actuator 6 is connected with second valve block and (need to prove; First valve block and second valve block possibly have various structure, and promptly second valve block possibly not have second station in the present embodiment, that is to say that this another part first actuator that is connected with second valve block is not connected with second hydraulic subsystem); Therefore, can realize control respectively through the first different valve blocks 1 ' to the first different actuators.Wherein, When a certain first valve block 1 ' is in first station; Drive first actuator, 6 work that are connected with this a certain first valve block 1 '; And when this a certain first valve block 1 ' was in second station, first pump 5 no longer provided pressure oil to first actuator 6 that is connected with this a certain first valve block 1 ', thereby this first actuator 6 is quit work.Therefore; Can control each first valve block 1 ' in first multiple directional control valve 1 respectively; Thereby make with first actuator that first valve block is connected in a part of proper functioning and another part quits work, further, first valve block that out-of-work this another part first actuator is connected is in second station; Thereby can pressure oil be provided to second hydraulic subsystem; Simultaneously, first valve block that this part first actuator of proper functioning is connected then is in first station, thus can continue the motion and unaffected.It is thus clear that the hydraulic system among Fig. 2 is unnecessary to make the first all actuators all be in out-of-work state just can provide pressure oil to second hydraulic subsystem, thereby has improved the efficient of whole hydraulic system, has reduced energy consumption.When first valve block 1 ' is in first station; Those skilled in the art can adopt multiple mode (like one-way valve or stop valve or selector valve) to realize the isolation of first hydraulic subsystem and second hydraulic subsystem; The two is worked respectively independently; Have no influence each other, preferably, can make through one-way valve 2 second hydraulic subsystem is connected with first multiple directional control valve 1 or each first valve block 1 '.
Further; The utility model also need be considered the switching time of first multiple directional control valve 1 or its each first valve block 1 ' and the size of aperture; Promptly when first pump 5 provides pressure oil to second hydraulic subsystem, and how much pressure oil is provided, and this must depend on actual operating mode; Promptly must satisfy following two conditions simultaneously: (1) uses first pump 5 to second hydraulic subsystem pressure oil to be provided, and must not influence the movement velocity of each first actuator of first hydraulic subsystem; (2) only, second hydraulic subsystem just to second hydraulic subsystem pressure oil is provided under can't satisfying the situation of the performance index that operator require by first pump 5.
For this reason, this hydraulic system also comprises the operating mode adaptive controller, and it is used for controlling the size that each first valve block switches to second station and is used to control the aperture of each said first valve block from first station according to operating mode.Preferably, when the aggregate demand flow of each first actuator during more than or equal to the output flow of first pump, each first valve block that the operating mode adaptive controller is controlled in first multiple directional control valve is in first station.Preferably; When the aggregate demand flow of each first actuator less than the aggregate demand flow of the output flow of first pump and this at least one second actuator during smaller or equal to the output flow of second pump, each first valve block that the operating mode adaptive controller is controlled in first multiple directional control valve is in first station.Preferably; When the aggregate demand flow of each first actuator less than the demand volume of the output flow of first pump and this at least one second actuator during greater than the output flow of second pump, at least one first valve block that the operating mode adaptive controller is controlled in first multiple directional control valve is in second station.
On above-mentioned each embodiment's basis, the second aspect of the utility model also provides a kind of concrete pumping equipment, and it comprises the hydraulic system in above-mentioned each mode of execution.Preferably, in conjunction with Fig. 1-2, first hydraulic subsystem in the hydraulic system is a jib supporting leg hydraulic subsystem, and second hydraulic subsystem in the hydraulic system is the pumps hydraulic subtense angle.Preferably, hydraulic system is according to the first multiple directional control valve switching-over of concrete pumping equipment to the rate request controlled hydraulic system of the rate request of its jib (and/or supporting leg) and/or pumping.
Please again with reference to figure 1; First pump 5 at first guarantees the motion of the jib supporting leg in the jib supporting leg hydraulic subsystem; So when having an actuator to move in the jib supporting leg hydraulic subsystem, then need make first multiple directional control valve 1 be operated in first (i.e. position, a left side), at this moment; The pressure oil of first pump 5 gets into jib supporting leg hydraulic subsystem through first multiple directional control valve 1; And can get into fuel tank through first multiple directional control valve 1 through the pressure oil that one-way valve 2 limits second pump 4, this moment, pumps hydraulic subtense angle and jib supporting leg hydraulic subsystem worked alone, and did not have influence each other; If all actuators all are in halted state in the jib supporting leg hydraulic subsystem; Then can make first multiple directional control valve 1 be operated in second station (promptly right position), at this moment, the pressure oil of first pump 5 gets into the pumps hydraulic subtense angles through first multiple directional control valve 1, one-way valve 2; Promptly this moment, second pump 4 and first pump 5 were in the interflow state; Thereby improved the pumping capacity of concrete pumping equipment and the efficient of hydraulic system, and improved the Rate of load condensate of the motor of concrete pumping equipment, reduced energy consumption.
Please again with reference to figure 2; Through first multiple directional control valve 1, one-way valve 2 pumps hydraulic subtense angle and jib supporting leg hydraulic subsystem are coupled together; Wherein, Second pump 4 is the oil pump of pumps hydraulic subtense angle, and first pump 5 is the oil pump of jib supporting leg hydraulic subsystem, and first valve block 1 ' is a slice in first multiple directional control valve 1 in the jib supporting leg hydraulic subsystem; Because jib supporting leg hydraulic subsystem is generally the load-sensitive control system; First multiple directional control valve 1 is the solenoid-operated proportional selector valve; Thereby can realize that a plurality of first actuators move simultaneously, and the step-less adjustment of the movement velocity of each first actuator, the size of its speed and load is had nothing to do.Therefore; Even some first actuator is in movement process in the jib supporting leg hydraulic subsystem; If at least one first valve block in first multiple directional control valve 1 is operated in second station (promptly upper); Then the partial pressure oil of first pump 5 also can get in the pumps hydraulic subtense angles through first multiple directional control valve 1, one-way valve 2, and does not influence the motion of other first actuators, thereby has improved the pumping capacity and the hydraulic system efficient of concrete pumping equipment; And improved the Rate of load condensate of the motor of concrete pumping equipment, reduced energy consumption.
Fig. 3 is illustrated the control flow of the operating mode adaptive controller in the hydraulic system shown in Figure 2, and this operating mode adaptive controller is used for the switching-over of first multiple directional control valve is controlled.As shown in Figure 3, any during the realization of operating mode adaptive controller may further comprise the steps or a plurality of:
(1) detects and the demand volume Q that calculates jib supporting leg hydraulic subsystem
1, first pump output flow Q
2, the pumps hydraulic subtense angle demand volume Q
3Output flow Q with second pump
4
Preferably, adopt following method to obtain above-mentioned each flow: the demand volume Q that obtains jib supporting leg hydraulic subsystem according to the electric current of each Proportional valve in each actuator in the jib supporting leg hydraulic subsystem
1, the output flow Q that obtains first pump according to the rotation speed n 1 and the discharge capacity q1 of first pump 5
2The requirement of the rate of pumping that sends according to operator obtains the demand volume Q of pumps hydraulic subtense angle
3The output flow Q that obtains second pump according to the rotation speed n 2 and the discharge capacity q2 of second pump 4
4
(2) according to the demand volume Q of jib supporting leg hydraulic subsystem
1Output flow Q with first pump
2Comparative result; Or according to the demand volume Q of jib supporting leg hydraulic subsystem
1Output flow Q with first pump
2Comparative result, and the demand volume Q of pumps hydraulic subtense angle
3Output flow Q with second pump
4Comparative result determine first pump whether to pumps hydraulic subtense angle fuel feeding, further, also can confirm the size of the flow that first pump provides to the pumps hydraulic subtense angle.
Preferably, if the demand volume Q of jib supporting leg hydraulic subsystem
1The output flow Q of>=the first pump
2, then each first valve block in first multiple directional control valve is not operated in first station, and promptly first pump is not given pumps hydraulic subtense angle fuel feeding;
Preferably, if the demand volume Q of jib supporting leg hydraulic subsystem
1The output flow Q of＜the first pump
2, and the demand volume Q of pumps hydraulic subtense angle
3The output flow Q of≤the second pump
4, then each first valve block in first multiple directional control valve is not operated in first station, and promptly first pump is not given pumps hydraulic subtense angle fuel feeding;
Preferably, if the demand volume Q of jib supporting leg hydraulic subsystem
1The output flow Q of＜the first pump
2, and the demand volume Q of pumps hydraulic subtense angle
3The output flow Q of＞the second pump
4, then at least one first valve block in first multiple directional control valve all is operated in first station, and promptly first pump is to pumps hydraulic subtense angle fuel feeding.Preferably, can (be the demand volume Q of pumps hydraulic subtense angle according to the flow that pumps hydraulic subtense angle actual demand replenishes
3The output flow Q of-the second pump
4) and the jib supporting leg hydraulic subsystem extra flow that can provide (the i.e. output flow Q of first pump
2The demand volume Q of-jib supporting leg hydraulic subsystem
1) confirm the size of first pump 5 to pumps hydraulic subtense angle fuel supply flow rate Q; For example; If the extra flow that flow＞jib supporting leg hydraulic subsystem can provide that pumps hydraulic subtense angle actual demand replenishes, then the Q=jib supporting leg hydraulic subsystem extra flow that can provide; If the extra flow that flow＜jib supporting leg hydraulic subsystem can provide that pumps hydraulic subtense angle actual demand replenishes, the then additional flow of Q=pumps hydraulic subtense angle actual demand.
(3) control the aperture of at least one first valve block of first multiple directional control valve according to first pump to the size of pumps hydraulic subtense angle fuel supply flow rate Q, to realize to of the control of first pump to the fuel supply flow rate of pumps hydraulic subtense angle.Preferably, because first multiple directional control valve is an electromagnetic proportional valve, therefore, the aperture control through to first multiple directional control valve just can realize first pump is given the control of pumps hydraulic subtense angle fuel supply flow rate.Preferably; The aperture of each first valve block of first multiple directional control valve is by input current i (or voltage) decision of its electromagnetic coil; The operating mode adaptive controller is according to the size of first pump 5 to pumps hydraulic subtense angle fuel supply flow rate Q; In conjunction with the current i (or voltage) of each first valve block of first multiple directional control valve and the relation property between the flow; Control current i (or voltage) to corresponding first valve block output of first multiple directional control valve in real time, thereby satisfied the job requirement of pumps hydraulic subtense angle and jib supporting leg hydraulic subsystem simultaneously.
Concrete pumping equipment in the utility model and hydraulic system thereof can provide pressure oil to second hydraulic subsystem through its first pump, and one side significantly improves hydraulic system efficient, has improved the Rate of load condensate of concrete pumping equipment motor, cuts down the consumption of energy; Make the maximum pumping capacity of concrete pumping equipment improve more than 15% on the other hand.
The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (12)
1. a hydraulic system is characterized in that, comprising:
First hydraulic subsystem; Said first hydraulic subsystem comprises first pump and at least one first actuator; Be provided with first multiple directional control valve between said first pump and said first actuator, said first multiple directional control valve comprises at least one first station and at least one second station;
Second hydraulic subsystem, said second hydraulic subsystem comprise second pump and at least one second actuator, and said second pump drives said at least one second actuator;
Said first pump drives said at least one first actuator through said first station, said first pump through said second station with said at least one second actuator of the said second pump driven in common.
2. hydraulic system according to claim 1 is characterized in that, said first hydraulic subsystem also comprises second multiple directional control valve, and said at least one first actuator is connected with said first multiple directional control valve through said second multiple directional control valve.
3. hydraulic system according to claim 1 is characterized in that, said second hydraulic subsystem passes through one-way valve or stop valve or selector valve and is connected with said first multiple directional control valve.
4. hydraulic system according to claim 1; It is characterized in that; Said first multiple directional control valve comprises a plurality of first valve blocks and a plurality of second valve block; Each said first valve block comprises said first station and said second station, and said first actuator of a part is connected with said first valve block, and said first actuator of another part is connected with said second valve block.
5. hydraulic system according to claim 4 is characterized in that, said second hydraulic subsystem passes through one-way valve or stop valve or selector valve and is connected with said each first valve block.
6. according to claim 4 or 5 described hydraulic systems; It is characterized in that; Said hydraulic system also comprises the operating mode adaptive controller, is used for switching to second station and being used to control the size of the aperture of each said first valve block from said first station according to each said first valve block of operating mode control.
7. hydraulic system according to claim 6; It is characterized in that; When the aggregate demand flow of each said first actuator during more than or equal to the output flow of said first pump, each said first valve block that said operating mode adaptive controller is controlled in said first multiple directional control valve is in said first station.
8. hydraulic system according to claim 6; It is characterized in that; When the aggregate demand flow of each said first actuator less than the aggregate demand flow of the output flow of said first pump and each said second actuator during smaller or equal to the output flow of said second pump, each said first valve block that said operating mode adaptive controller is controlled in said first multiple directional control valve is in said first station.
9. hydraulic system according to claim 6; It is characterized in that; When the aggregate demand flow of each said first actuator less than the demand volume of the output flow of first pump and said at least one second actuator during greater than the output flow of said second pump, at least one said first valve block that said operating mode adaptive controller is controlled in said first multiple directional control valve is in said second station.
10. a concrete pumping equipment is characterized in that, it comprises according to each described hydraulic system among the claim 1-9.
11. concrete pumping equipment according to claim 10 is characterized in that, first hydraulic subsystem in the said hydraulic system is a jib supporting leg hydraulic subsystem, and second hydraulic subsystem in the said hydraulic system is the pumps hydraulic subtense angle.
12. concrete pumping equipment according to claim 11 is characterized in that, said hydraulic system is controlled first multiple directional control valve switching-over of said hydraulic system to the rate request of the rate request of its jib and/or pumping according to said concrete pumping equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120330554XU CN202203191U (en) | 2011-09-05 | 2011-09-05 | Concrete pumping apparatus and hydraulic system thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120330554XU CN202203191U (en) | 2011-09-05 | 2011-09-05 | Concrete pumping apparatus and hydraulic system thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322454A (en) * | 2011-09-05 | 2012-01-18 | 长沙中联重工科技发展股份有限公司 | Concrete pumping equipment and hydraulic system thereof |
| WO2013033884A1 (en) * | 2011-09-05 | 2013-03-14 | 长沙中联重工科技发展股份有限公司 | Concrete pumping equipment and hydraulic system thereof |
-
2011
- 2011-09-05 CN CN201120330554XU patent/CN202203191U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322454A (en) * | 2011-09-05 | 2012-01-18 | 长沙中联重工科技发展股份有限公司 | Concrete pumping equipment and hydraulic system thereof |
| WO2013033884A1 (en) * | 2011-09-05 | 2013-03-14 | 长沙中联重工科技发展股份有限公司 | Concrete pumping equipment and hydraulic system thereof |
| CN102322454B (en) * | 2011-09-05 | 2013-03-20 | 中联重科股份有限公司 | Concrete pumping equipment and hydraulic system thereof |
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