CN102312873B - Concrete pump truck and hydraulic control system thereof - Google Patents
Concrete pump truck and hydraulic control system thereof Download PDFInfo
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- CN102312873B CN102312873B CN 201110240597 CN201110240597A CN102312873B CN 102312873 B CN102312873 B CN 102312873B CN 201110240597 CN201110240597 CN 201110240597 CN 201110240597 A CN201110240597 A CN 201110240597A CN 102312873 B CN102312873 B CN 102312873B
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Abstract
The invention discloses a concrete pump truck and a hydraulic control system thereof, wherein the hydraulic control system comprises a first hydraulic pump (11), a flow control component (2), a hydraulic sub system (31) of an arm support, and a hydraulic sub system (32) of a ground jack, wherein the input end of the flow control component (2) is connected with the oil outlet of the first hydraulic pump (11); the oil inlet of the hydraulic sub system (31) of the arm support is connected with the output end of the flow control component (2); the oil inlet of the hydraulic sub system (32) of the ground jack is connected with the output end of the flow control component (2); and the hydraulic control system further comprises a distribution hydraulic sub system (33) and a mixing, cleaning and cooling hydraulic sub system (34), and at least one oil inlet of the distribution hydraulic sub system (33) and the mixing, cleaning and cooling hydraulic sub system (34) is connected with the output end of the flow control component (2). The hydraulic control system is simpler, has lower cost and lower failure rate, so the unified allocation of power is facilitated.
Description
Technical field
The present invention relates to the concrete technology field, relate in particular to a kind of concrete mixer and hydraulic control system thereof.
Background technique
Concrete mixer is because the construction maneuverability is used more and more extensive in modern project.Hydraulic control system is the part of most critical in the concrete mixer, as shown in Figure 1, the hydraulic control system of concrete mixer generally comprises jib hydraulic subsystem 31, supporting leg hydraulic subsystem 32, distribution hydraulic subsystem 33, stirring and washing cooling hydraulic subsystem 34 and pumps hydraulic subtense angle 35 etc.The a plurality of pumps of general employing are given respectively every sub-systems fuel feeding.Thereby, this hydraulic control system also comprises a plurality of oil hydraulic pumps, wherein the oil outlet of the first oil hydraulic pump 11 is connected with the supporting leg hydraulic subsystem with jib hydraulic subsystem 31 and is connected by flow control assembly 2, to its fuel feeding, as can be seen from Figure 1, in the prior art, the second oil hydraulic pump 12, the 3rd oil hydraulic pump 13 and the 4th oil hydraulic pump 14 are together in series and form a cover pump group, respectively to pumps hydraulic subtense angle 35, distribution hydraulic subsystem 33 and stirring and washing cooling hydraulic subsystem fuel feeding.This first oil hydraulic pump 11 is generally plunger pump; This second oil hydraulic pump 12 is generally plunger pump; The 3rd oil hydraulic pump 13 is generally constant pressure pump; The 4th oil hydraulic pump 14 is generally gear pump.
Particularly, pumps hydraulic subtense angle 35 is used for driving the pumping oil cylinder of concrete mixer, direction and the speed of control pumping oil cylinder.
Distribute hydraulic subsystem 33 to drive distributing mechanism, the commutation of control distributing mechanism.Its structure comprises one-way valve 331 as shown in Figure 2, pressure gauge 332, and relief valve 333, accumulator 334, solenoid directional control valve 335, hydraulicchange-over valve 336 distributes oil hydraulic cylinder 337,338.Pressure oil system's pressurize after one-way valve 331 enters accumulator 334 to be pressurized to setting value from the 3rd oil hydraulic pump 13, when distributing oil hydraulic cylinder 337,338 to need action, the 3rd oil hydraulic pump 13, accumulator 334 be fuel feeding together, enter distribution oil hydraulic cylinder 337 or 338 through hydraulicchange-over valve 336, promote the oil hydraulic cylinder action.Distribute hydraulic subsystem pressure to be set by the 3rd oil hydraulic pump 13, by relief valve 333 restriction system maximum pressures.
Stirring and washing cooling hydraulic subsystem 34 is used for driving stirring mechanism.Fig. 3 is a kind of stirring and washing cooling hydraulic subsystem sketch commonly used.This subtense angle comprises pressure gauge 343, relief valve 344, solenoid directional control valve 345, stirring motor 346.The pressure oil of the 4th oil hydraulic pump 14 drives stirring motor 346 rotations through solenoid directional control valve 345.System's maximum pressure is set by relief valve 344.
Jib hydraulic subsystem 31 is used for driving arm support oil cylinder, control jib movement speed and direction; Supporting leg hydraulic subsystem 32 is used for the action of control supporting leg.Fig. 4 is a kind of jib commonly used and the connection sketch of supporting leg hydraulic subsystem and flow control assembly.Can see that the oil outlet of the first oil hydraulic pump 11 is connected with filter 15, flow control assembly 2 comprises proportional multi-way valve group 21, is provided with contiguous block 212 and multi-disc proportional multi-way valve 211 in this proportional multi-way valve group 21.The hydraulic oil of the first oil hydraulic pump 11 outputs drives jib hydraulic subsystem 31 or 32 actions of supporting leg hydraulic subsystem through filter 15, proportional multi-way valve 211.
There is following shortcoming in the hydraulic control system of concrete mixer of the prior art:
At first, oil hydraulic pump pump quantity is more, causes system complex, and rate of fault is high, and cost is high, and because the independent fuel feeding of subsystems (jib hydraulic subsystem, supporting leg hydraulic subsystem etc.), and power can not unified allocation of resources optimization, and system effectiveness is lower.
In addition, the 3rd oil hydraulic pump 13 is constant pressure pump, so that distribute the dispense pressure of hydraulic subsystem 33 automatically not regulate as required, the 3rd oil hydraulic pump 13 is in the high-pressure low-flow state for a long time, affects 13 life-spans of the 3rd oil hydraulic pump.
In addition, the 4th oil hydraulic pump 14 is gear pump, so that the mixing speed of stirring and washing cooling hydraulic subsystem 34 is fixed, can not automatically regulate as required.
Summary of the invention
Technical problem to be solved by this invention provides a kind of concrete mixer and hydraulic control system thereof, and this hydraulic control system is simpler, and cost is lower, and the rotating speed of the pressure of its distribution hydraulic subsystem or stirring and washing cooling hydraulic subsystem is adjustable.
For solving the problems of the technologies described above, according to an aspect of the present invention, provide a kind of hydraulic control system of concrete mixer, comprising: the first oil hydraulic pump; Flow control assembly, its input end is connected with the oil outlet of the first oil hydraulic pump; The jib hydraulic subsystem, its filler opening is connected with the output terminal of flow control assembly; The supporting leg hydraulic subsystem, its filler opening is connected with the output terminal of flow control assembly, this hydraulic control system also comprises: distribute hydraulic subsystem and stirring and washing cooling hydraulic subsystem, at least one the filler opening that distributes hydraulic subsystem to be connected with stirring and washing in the hydraulic subsystem is connected with the output terminal of flow control assembly.
Further, flow control assembly comprises the proportional multi-way valve group, the proportional multi-way valve group comprises the multi-disc proportional multi-way valve, form at least the first group proportional multi-way valve and second group of proportional multi-way valve, every proportional multi-way valve comprises a plurality of output circuits, wherein, a plurality of filler openings of jib hydraulic subsystem are connected with a plurality of output circuits of first group of proportional multi-way valve in the proportional multi-way valve group respectively; One or more output circuits of second group of proportional multi-way valve in the filler opening of supporting leg hydraulic subsystem and the proportional multi-way valve group are connected.
Further, the first oil hydraulic pump is the load-sensitive pump, which is provided with the load-sensitive valve, be connected with one-way valve between the filler opening of the filler opening of distribution hydraulic subsystem and/or stirring and washing cooling hydraulic subsystem and the load-sensitive valve, one-way valve is towards the direction conducting of load-sensitive valve.
Further, the first oil hydraulic pump is discharge capacity regulated variable pump.
Further, flow control assembly also comprises one or two Flow valve, and wherein, the filler opening of each Flow valve is connected to the oil outlet of the first oil hydraulic pump; The oil outlet of each Flow valve is connected to one the filler opening that distributes in hydraulic subsystem and the stirring and washing cooling hydraulic subsystem.
Further, the filler opening of at least one in distribution hydraulic subsystem and the stirring and washing cooling hydraulic subsystem is connected to an output circuit of a slice proportional multi-way valve.
Further, flow control assembly also comprises diverter valve, and wherein, the filler opening of diverter valve is connected to an output circuit of a slice proportional multi-way valve; The first oil outlet of diverter valve is connected to the filler opening that distributes hydraulic subsystem; The second oil outlet of diverter valve is connected to the filler opening of stirring and washing cooling hydraulic subsystem.
Further, flow control assembly also comprises a Flow valve, and the filler opening of Flow valve is connected to the oil outlet of the first oil hydraulic pump, and the oil outlet of Flow valve is connected to one the filler opening that distributes in hydraulic subsystem and the stirring and washing cooling hydraulic subsystem; The filler opening of another in distribution hydraulic subsystem and the stirring and washing cooling hydraulic subsystem is connected to an oil outlet of a slice proportional multi-way valve.
Further, distribute the filler opening place of hydraulic subsystem to be provided with pressure transducer, when pressure transducer detected the dispense pressure of distributing in the hydraulic subsystem and reaches predefined value, the hydraulic flow with the output terminal that distributes hydraulic subsystem to link to each other in the flow control assembly was reduced or closes.
Further, also comprise: the second oil hydraulic pump; Hydraulic system of pump, its filler opening is connected with the oil outlet of the second oil hydraulic pump.
According to another aspect of the present invention, also provide a kind of concrete mixer, this concrete mixer comprises the hydraulic control system of above-mentioned any concrete mixer.
The present invention has following beneficial effect:
At least one the filler opening that distribution hydraulic subsystem in the hydraulic control system of concrete mixer of the present invention is connected with stirring and washing in the hydraulic subsystem is connected with the output terminal of flow control assembly, thereby can come fuel feeding by the first oil hydraulic pump that links to each other with flow control assembly, so that can save in the hydraulic control system as distributing the oil hydraulic pump of hydraulic subsystem and/or stirring and washing cooling hydraulic subsystem fuel feeding, so that this hydraulic control system is simpler, cost is lower, rate of fault is lower, makes things convenient for the unified allocation of resources of power.In addition, can regulate and distribute the pressure of hydraulic subsystem or the rotating speed of stirring and washing cooling hydraulic subsystem by flow control assembly, so that realize distributing the dispense pressure in the hydraulic subsystem automatically to change as required, and realize that the mixing speed of stirring and washing cooling hydraulic subsystem changes as required automatically.
In the hydraulic control system of concrete mixer of the present invention, the first above-mentioned oil hydraulic pump can also be the variable displacement pumps such as load-sensitive pump, discharge capacity regulated variable pump, at this moment can regulate according to the actual conditions of load the output hydraulic pressure oil discharge capacity of the first oil hydraulic pump, thereby improve the utilization ratio of the first oil hydraulic pump, and then improve the efficient of whole hydraulic control system.
Except purpose described above, feature and advantage, the present invention also has other purpose, feature and advantage.The below is with reference to figure, and the present invention is further detailed explanation.
Description of drawings
Accompanying drawing is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the Integral connection structure schematic representation of the hydraulic control system of concrete mixer in the prior art;
Fig. 2 is the linkage structure schematic representation that distributes hydraulic subsystem in the hydraulic control system of concrete mixer in the prior art;
Fig. 3 is the linkage structure schematic representation of stirring and washing cooling hydraulic subsystem in the hydraulic control system of concrete mixer in the prior art;
Fig. 4 is the linkage structure schematic representation of jib and supporting leg hydraulic subsystem and flow control assembly in the hydraulic control system of concrete mixer in the prior art;
Fig. 5 is the Integral connection structure schematic representation according to the hydraulic control system of concrete mixer of the present invention;
Fig. 6 is the linkage structure schematic representation according to the hydraulic control system of the concrete mixer of the first embodiment of the present invention, has omitted the pumps hydraulic subtense angle among the figure;
Fig. 7 is the linkage structure schematic representation of the hydraulic control system of concrete mixer according to a second embodiment of the present invention, has omitted the pumps hydraulic subtense angle among the figure;
Fig. 8 is the linkage structure schematic representation of hydraulic control system of the concrete mixer of a third embodiment in accordance with the invention, has omitted the pumps hydraulic subtense angle among the figure;
Fig. 9 is according to the linkage structure schematic representation that distributes hydraulic subsystem in the hydraulic control system of concrete mixer of the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
As shown in Figure 5, the hydraulic control system according to concrete mixer of the present invention comprises: the first oil hydraulic pump 11, flow control assembly 2, jib hydraulic subsystem 31, supporting leg hydraulic subsystem 32 and distribution hydraulic subsystem 33 and stirring and washing cooling hydraulic subsystem 34.The input end of this flow control assembly 2 is connected with the oil outlet of the first oil hydraulic pump 11, and a plurality of output terminals of this flow control assembly 2 are connected with the filler opening of the filler opening of jib hydraulic subsystem 31 and supporting leg hydraulic subsystem 32, the filler opening that distributes the filler opening of hydraulic subsystem 33 to be connected hydraulic subsystem 34 with stirring and washing respectively.In Fig. 5, the filler opening of distribution hydraulic subsystem 33 is connected hydraulic subsystem 34 with stirring and washing filler opening all is connected with 2 one output terminals of flow control assembly, in practice, it also is possible distributing hydraulic subsystem 33 to be connected with stirring and washing that one filler opening in the hydraulic subsystem 34 is connected with an output terminal of flow control assembly 2.
Because at least one the filler opening that the distribution hydraulic subsystem 33 in the hydraulic control system of this concrete mixer is connected with stirring and washing in the hydraulic subsystem 34 is connected with the output terminal of flow control assembly 2, thereby can come fuel feeding by the first oil hydraulic pump 11 that links to each other with flow control assembly 2, so that can save in the hydraulic control system of the prior art as distributing the oil hydraulic pump (i.e. the 3rd oil hydraulic pump 13 and the 4th oil hydraulic pump 14) of hydraulic subsystem 33 and/or stirring and washing cooling hydraulic subsystem 34 fuel feeding, so that this hydraulic control system is simpler, cost is lower, rate of fault is lower, makes things convenient for the unified allocation of resources of power.In addition, can regulate and distribute the pressure of hydraulic subsystem 33 or the rotating speed of stirring and washing cooling hydraulic subsystem 34 by flow control assembly 2, so that realize distributing the dispense pressure in the hydraulic subsystem 33 automatically to change as required, and realize that the mixing speed of stirring and washing cooling hydraulic subsystem 34 changes as required automatically.
Preferably, as shown in Figure 6, in the hydraulic control system according to the concrete mixer of the first embodiment of the present invention, flow control assembly 2 comprises proportional multi-way valve group 21, this proportional multi-way valve group 21 comprises multi-disc proportional multi-way valve 211, form at least the first group proportional multi-way valve and second group of proportional multi-way valve, every proportional multi-way valve 211 comprises a plurality of output circuits.Wherein, a plurality of filler openings of jib hydraulic subsystem 31 are connected with a plurality of output circuits of first group of proportional multi-way valve (in an embodiment of the present invention for four proportional multi-way valves 211 in right side) in the proportional multi-way valve group 21 respectively; One or more (being in an embodiment of the present invention one) output circuit of second group of proportional multi-way valve in the filler opening of supporting leg hydraulic subsystem 32 and the proportional multi-way valve group 21 (being in an embodiment of the present invention first proportional multi-way valve 211 of left side) is connected.
Preferably, as shown in Figure 6, in the hydraulic control system according to the concrete mixer of the first embodiment of the present invention, the first oil hydraulic pump 11 is the load-sensitive pump, which is provided with load-sensitive valve 111, be connected with one-way valve 23 between the filler opening of the filler opening of distribution hydraulic subsystem 33 and/or stirring and washing cooling hydraulic subsystem 34 and the load-sensitive valve 111, one-way valve 23 is towards the direction conducting of load-sensitive valve 111.Particularly, in the first embodiment, as shown in Figure 6, the filler opening of distribution hydraulic subsystem 33 is connected hydraulic subsystem 34 with stirring and washing filler opening all is connected with an output terminal of flow control assembly 2, the filler opening that distributes the filler opening of hydraulic subsystem 33 and stirring and washing cooling hydraulic subsystem 34 respectively and be connected with an one-way valve 23 between the load-sensitive valve 111, and the oil circuit node in the downstream of these two one-way valves 23 is connected to the load-sensitive valve 111 of the first oil hydraulic pump 11.The oil pressure of the load side that this first oil hydraulic pump 11 can sense according to its load-sensitive valve 111 is controlled the hydraulic oil discharge capacity of output, thereby improves the utilization ratio of the first oil hydraulic pump, and then improves the efficient of whole hydraulic control system.
Among the embodiment who in accompanying drawing of the present invention, does not illustrate, for example only have the hydraulic subsystem 33 of distribution to be connected with the output terminal of flow control assembly 2, and stirring and washing cooling liquid pressing system 34 has in the situation of its independent oil hydraulic pump fuel feeding, be appreciated that, only need an one-way valve 23, be connected to distribute between hydraulic subsystem 33 and the load-sensitive valve 111 and get final product.
In addition, preferably, in according to other embodiments of the invention, the first oil hydraulic pump 11 also can be discharge capacity regulated variable pump, at this moment need to receive the oil pressure value that distributes in the hydraulic subsystem 33 by the controller in the system, and output electrical signals is to control the output hydraulic pressure oil discharge capacity of this first oil hydraulic pump 11.Be appreciated that this discharge capacity regulated variable pump equally can be so that improve the utilization ratio of oil hydraulic pump, and then play the effect of the efficient that improves whole hydraulic control system.
Preferably, flow control assembly 2 also comprises one or two Flow valve 22, and wherein, the filler opening of each Flow valve 22 is connected to the oil outlet of the first oil hydraulic pump 11; The oil outlet of each Flow valve 22 is connected to one the filler opening that distributes in hydraulic subsystem 33 and the stirring and washing cooling hydraulic subsystem 34.As shown in Figure 6, according to the first embodiment of the present invention the hydraulic control system of concrete mixer in, be connected with an output terminal of flow control assembly 2 respectively owing to distribute hydraulic subsystem 33 to be connected hydraulic subsystem 34 with stirring and washing, so need two Flow valves 22.Distribute hydraulic subsystem 33 to be connected hydraulic subsystem 34 with stirring and washing and all be connected with flow control assembly, and be not connected with the output circuit of proportional multi-way valve, also can reduce the load of proportional multi-way valve, thereby can select less proportional multi-way valve, reduce cost.
Perhaps preferably, the filler opening of at least one in distribution hydraulic subsystem 33 and the stirring and washing cooling hydraulic subsystem 34 also can be connected to an output circuit of a slice proportional multi-way valve 211.As shown in Figure 7, in the hydraulic control system of according to a second embodiment of the present invention concrete mixer, distribute the filler opening of hydraulic subsystem 33 to be connected to an output circuit of left side first proportional multi-way valve 211, by this proportional multi-way valve 211 to its fuel feeding.And in this second embodiment, the filler opening of stirring and washing cooling hydraulic subsystem 34 is connected with the oil outlet of the first oil hydraulic pump 11 by Flow valve 22.Certainly, in according to other embodiments of the invention, can exchange during the position of distribution hydraulic subsystem 33 and stirring and washing cooling hydraulic subsystem 34.
Preferably, as shown in Figure 8, in the hydraulic control system of the concrete mixer of a third embodiment in accordance with the invention, flow control assembly 2 also comprises diverter valve 24, and wherein, the filler opening of diverter valve 24 is connected to an output circuit of a slice proportional multi-way valve 211; The first oil outlet of diverter valve 24 is connected to the filler opening that distributes hydraulic subsystem 33; The second oil outlet of diverter valve 24 is connected to the filler opening of stirring and washing cooling hydraulic subsystem 34.Only being arranged so that of this diverter valve 24 needs an output circuit of a slice proportional multi-way valve just can control to distribute hydraulic subsystem 33 and 34 two hydraulic systems of stirring and washing cooling hydraulic subsystem.The shunt ratio of this diverter valve 24 can be regulated as required.
Preferably, as shown in Figure 9, the pressure gauge 332 at the filler opening place of former distribution hydraulic subsystem 33 can be changed to pressure transducer 332a, when this pressure transducer 332a detects the dispense pressure of distributing in the hydraulic subsystem 33 and reaches predefined value, can will be in the flow control assembly 2 reduce with the hydraulic flow of the output terminal that distributes hydraulic subsystem 33 link to each other, only be used for the replenishment system leakage rate; Perhaps will close with the output terminal that distributes hydraulic subsystem 33 to link to each other in the flow control assembly 2, and be specially and to close with the Flow valve 22 that distributes hydraulic subsystem 33 to link to each other or the corresponding output circuit of proportional multi-way valve, make the pressurize of distribution hydraulic subsystem.
Preferably, the hydraulic control system according to concrete mixer of the present invention also comprises: the second oil hydraulic pump 12; And hydraulic system of pump 35, its filler opening is connected with the oil outlet of the second oil hydraulic pump 12.
The present invention also provides a kind of concrete mixer, comprises the hydraulic control system of above-mentioned any concrete mixer.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. the hydraulic control system of a concrete mixer comprises:
The first oil hydraulic pump (11);
Flow control assembly (2), its input end is connected with the oil outlet of described the first oil hydraulic pump (11);
Jib hydraulic subsystem (31), its filler opening is connected with the output terminal of described flow control assembly (2);
Supporting leg hydraulic subsystem (32), its filler opening is connected with the output terminal of described flow control assembly (2),
It is characterized in that, also comprise:
Distribute hydraulic subsystem (33) and stirring and washing to cool off hydraulic subsystem (34), at least one the filler opening that described distribution hydraulic subsystem (33) is connected with stirring and washing in the hydraulic subsystem (34) is connected with the output terminal of described flow control assembly (2).
2. the hydraulic control system of concrete mixer according to claim 1, it is characterized in that, described flow control assembly (2) comprises proportional multi-way valve group (21), described proportional multi-way valve group (21) comprises multi-disc proportional multi-way valve (211), form at least the first group proportional multi-way valve and second group of proportional multi-way valve, every described proportional multi-way valve (211) comprises a plurality of output circuits, wherein
A plurality of filler openings of described jib hydraulic subsystem (31) are connected with a plurality of output circuits of first group of proportional multi-way valve in the described proportional multi-way valve group (21) respectively;
One or more output circuits of second group of proportional multi-way valve in the filler opening of described supporting leg hydraulic subsystem (32) and the described proportional multi-way valve group (21) are connected.
3. the hydraulic control system of concrete mixer according to claim 1 is characterized in that,
Described the first oil hydraulic pump (11) is the load-sensitive pump, which is provided with load-sensitive valve (111),
Be connected with one-way valve (23) between the filler opening of the filler opening of described distribution hydraulic subsystem (33) and/or stirring and washing cooling hydraulic subsystem (34) and the described load-sensitive valve (111), described one-way valve (23) is towards the direction conducting of described load-sensitive valve (111).
4. the hydraulic control system of concrete mixer according to claim 1 is characterized in that, described the first oil hydraulic pump (11) is discharge capacity regulated variable pump.
5. the hydraulic control system of any one described concrete mixer is characterized in that according to claim 1-4, and described flow control assembly (2) also comprises one or two Flow valve (22), wherein,
The filler opening of each described Flow valve (22) is connected to the oil outlet of described the first oil hydraulic pump (11);
The oil outlet of each described Flow valve (22) is connected to one filler opening in described distribution hydraulic subsystem (33) and the stirring and washing cooling hydraulic subsystem (34).
6. the hydraulic control system of concrete mixer according to claim 2, it is characterized in that the filler opening of at least one in described distribution hydraulic subsystem (33) and the described stirring and washing cooling hydraulic subsystem (34) is connected to an output circuit of the described proportional multi-way valve of a slice (211).
7. the hydraulic control system of concrete mixer according to claim 6 is characterized in that, described flow control assembly (2) also comprises diverter valve (24), wherein,
The filler opening of described diverter valve (24) is connected to an output circuit of the described proportional multi-way valve of a slice (211);
The first oil outlet of described diverter valve (24) is connected to the filler opening of described distribution hydraulic subsystem (33);
The second oil outlet of described diverter valve (24) is connected to the filler opening of described stirring and washing cooling hydraulic subsystem (34).
8. the hydraulic control system of concrete mixer according to claim 2 is characterized in that,
Described flow control assembly (2) also comprises a Flow valve (22), the filler opening of described Flow valve (22) is connected to the oil outlet of described the first oil hydraulic pump (11), and the oil outlet of described Flow valve (22) is connected to one filler opening in described distribution hydraulic subsystem (33) and the stirring and washing cooling hydraulic subsystem (34);
The filler opening of another in described distribution hydraulic subsystem (33) and the described stirring and washing cooling hydraulic subsystem (34) is connected to an oil outlet of the described proportional multi-way valve of a slice (211).
9. the hydraulic control system of concrete mixer according to claim 1, it is characterized in that, the filler opening place of described distribution hydraulic subsystem (33) is provided with pressure transducer (332a), when described pressure transducer (332a) detected dispense pressure in the described distribution hydraulic subsystem (33) and reaches predefined value, the hydraulic flow of the output terminal that links to each other with described distribution hydraulic subsystem (33) in the described flow control assembly (2) was reduced or closes.
10. the hydraulic control system of concrete mixer according to claim 1 is characterized in that, also comprises:
The second oil hydraulic pump (12);
Hydraulic system of pump (35), its filler opening is connected with the oil outlet of described the second oil hydraulic pump (12).
11. a concrete mixer is characterized in that, comprises the hydraulic control system of any one described concrete mixer among the claim 1-10.
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| CN 201110240597 CN102312873B (en) | 2011-08-19 | 2011-08-19 | Concrete pump truck and hydraulic control system thereof |
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| CN 201110240597 CN102312873B (en) | 2011-08-19 | 2011-08-19 | Concrete pump truck and hydraulic control system thereof |
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| CN103671315B (en) * | 2013-12-05 | 2016-03-30 | 中联重科股份有限公司 | Concrete pumping system and concrete pumping machinery |
| CN103699101A (en) * | 2013-12-25 | 2014-04-02 | 华菱星马汽车（集团）股份有限公司 | Electric control system for concrete pump truck |
| CN104842450A (en) * | 2015-02-06 | 2015-08-19 | 北汽福田汽车股份有限公司 | Mixer shaft rotation speed control system and concrete mixing machine equipped with same |
| CN105089275A (en) * | 2015-07-10 | 2015-11-25 | 北汽福田汽车股份有限公司 | Concrete pump truck and hydraulic system thereof |
| CN112983920A (en) * | 2021-05-20 | 2021-06-18 | 徐州徐工施维英机械有限公司 | Cleaning and stirring integrated valve, cleaning and stirring hydraulic system and concrete pumping equipment |
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| JP3748954B2 (en) * | 1996-09-06 | 2006-02-22 | 石川島建機株式会社 | Hydraulic control circuit for viscous fluid pump |
| CN100362247C (en) * | 2004-12-17 | 2008-01-16 | 卢永松 | Double pump confluence type multi-way ratio control valve with load sensitivity information circuit |
| WO2009090294A1 (en) * | 2008-01-17 | 2009-07-23 | Metso Minerals Inc. | A hydraulic power transmission system for a mineral material processing plant, a method for controlling the same, a screening machine and a crushing machine |
| CN201287664Y (en) * | 2008-10-22 | 2009-08-12 | 三一重工股份有限公司 | Concrete pump vehicle |
| CN202251170U (en) * | 2011-08-19 | 2012-05-30 | 中联重科股份有限公司 | Concrete pump truck and hydraulic control system thereof |
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Address after: 410013 Yuelu District, Hunan, silver basin Road, No. 361, No. Applicant after: Zoomlion Heavy Industry Science & Technology Development Co., Ltd. Address before: 410013 Yuelu District, Hunan, silver basin Road, No. 361, No. Applicant before: Chang Sha Zoomlion Heavy Industry Science & Technology Development Co., Ltd. |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |