CN102182715B - Hydraulic control system, hydraulic control module thereof and engineering machinery with hydraulic control system - Google Patents
Hydraulic control system, hydraulic control module thereof and engineering machinery with hydraulic control system Download PDFInfo
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- CN102182715B CN102182715B CN 201110132420 CN201110132420A CN102182715B CN 102182715 B CN102182715 B CN 102182715B CN 201110132420 CN201110132420 CN 201110132420 CN 201110132420 A CN201110132420 A CN 201110132420A CN 102182715 B CN102182715 B CN 102182715B
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- 239000000945 filler Substances 0.000 claims description 35
- 239000012530 fluid Substances 0.000 claims description 35
- 230000009467 reduction Effects 0.000 claims description 19
- 230000008676 import Effects 0.000 claims description 7
- 238000009530 blood pressure measurement Methods 0.000 claims description 3
- 238000013016 damping Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 68
- 230000009471 action Effects 0.000 description 19
- 230000000875 corresponding effect Effects 0.000 description 12
- 239000010720 hydraulic oil Substances 0.000 description 11
- 230000005611 electricity Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000002828 fuel tank Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
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- Fluid-Pressure Circuits (AREA)
- Chemical & Material Sciences (AREA)
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a hydraulic control system, a hydraulic control module thereof and an engineering machine with the system, wherein the hydraulic control module comprises: an oil inlet connected to an oil pump; a working oil port (C); oil return port (T), still include: one or more relief ports; and one or more valves (Y2, Y3), wherein the oil inlet of each valve (Y2, Y3) is connected to one or more unloading ports, and the oil outlet of each valve (Y2, Y3) is connected to the oil return port (T). The hydraulic control module plays a role in unloading the hydraulic element in an emergency, so that the hydraulic control system is guaranteed not to break down.
Description
Technical field
The present invention relates to Hydraulic Field, relate in particular to a kind of hydraulic control system and hydraulic control module thereof and have the engineering machinery of this hydraulic control system.
Background technique
Hydraulic control system in existing a kind of engineering machinery, it comprises a plurality of hydraulicdirectional control valves, a plurality of guide's reduction valve and hydraulic control module.Wherein each hydraulicdirectional control valve is arranged in the working connection in this hydraulic control system, controls the break-make of this working connection, and then indirect actuator such as the oil cylinder that is connected with working connection of control or oil hydraulic motor.Guide's reduction valve is used to control the action of hydraulicdirectional control valve.Wherein, hydraulic control module connects guide's reduction valve and hydraulicdirectional control valve simultaneously, and the action of hydraulicdirectional control valve is controlled in the action of control guide reduction valve simultaneously according to the action of guide's reduction valve.
Particularly, be example with a kind of hydraulic control module that is used for the hydraulic control system of truck crane, this hydraulic control module is provided with filler opening, return opening, actuator port and a plurality of control filler opening and a plurality of off-load mouth.Wherein, the actuator port of hydraulic control module is connected to the filler opening of guide's hydrovalve, supplies with hydraulic oil to it; The control filler opening of hydraulic control module is connected with the oil outlet of guide's reduction valve, receives the fluid from guide's reduction valve; The unloading port of hydraulic control module is connected with the control port of surging of hydraulicdirectional control valve, promotes its action.
Inner at hydraulic control module, also be provided with oil purifier, relief valve, solenoid valve and accumulator.The oil outlet of oil purifier connects the filler opening of relief valve and the actuator port of hydraulic control module simultaneously; The telecontrol mouth of relief valve is connected with the filler opening of solenoid valve; The oil outlet of solenoid valve is connected with the return opening of hydraulic control module, and the oil outlet of relief valve also is connected with the return opening of hydraulic control module.In addition, the hydraulic fluid port of accumulator is connected with actuator port.When serious urgency takes place in truck crane, the solenoid valve dead electricity, thus then can lose efficacy overflow via the telecontrol mouth control relief valve of relief valve, so just make the pressure oil release of whole supply hydraulicchange-over valves, and then stop in emergency.
Existing hydraulic control system is not a safe enough owing to when needs stop the action of hydraulicchange-over valve, just will supply with the pressure oil off-load to hydraulicchange-over valve.Particularly be stuck in valve body when motionless when hydraulicchange-over valve, the pressure oil that promote hydraulicchange-over valve this moment does not have, but selector valve can't be got back to meta, and actuator can also move, and potential safety hazard is arranged.In addition, existing hydraulic control system is because the pressure oil of hydraulic control module output earlier through distributing to hydraulicchange-over valve through hydraulic control module again behind guide's reduction valve, is realized the action of hoist.So fluid flow path process is complicated, is affected easily.Connection in the hydraulic control module between each element is to be realized by the oil duct of base plate interior processing, the complicated difficult processing of oil circuit, and residual processing impurity is easy-clear not.The long pressure oil of controlling the multi-way valve that surges that makes easily of oil duct produces time-delay, causes the hoist action that hysteresis is arranged.
In addition, can be known by preceding text that the oil pump that the hydraulic control module in this hydraulic control system need be connected with its filler opening is in the fuel feeding state always, the suffered load of oil pump is bigger.
Summary of the invention
Technical problem to be solved by this invention provides a kind of hydraulic control system and hydraulic control module thereof and has the engineering machinery of this hydraulic control system; The fault of hydraulic control system is avoided in the hydraulic element off-load of using this hydraulic control module when urgency takes place, will be connected with hydraulic control module.
For solving the problems of the technologies described above, according to an aspect of the present invention, hydraulic control module is provided, comprising: filler opening is connected to oil pump; Actuator port; Return opening also comprises: one or more off-load mouths; And one or more valves, the filler opening of each valve is connected to one or more off-load mouths, and the oil outlet of each valve is connected to return opening.
Further, each off-load mouth is formed by an one-way valve, and the filler opening of each 2/2-way solenoid valve is connected to the outlet of one or more one-way valves.
Further, the off-load mouth is arranged on the outer edge of hydraulic control module.
Further, this hydraulic control module also comprises: accumulator; The two-bit triplet solenoid valve, its first filler opening is connected to the return opening of hydraulic control module, and its second filler opening is connected to the hydraulic fluid port of accumulator, and its oil outlet is connected to the actuator port of hydraulic control module; Hydraulicchange-over valve, its control port is connected with the hydraulic fluid port of accumulator, and its filler opening is connected with the filler opening of hydraulic control module, and its first oil outlet is connected with the hydraulic fluid port of accumulator, and second oil outlet is connected with the return opening of hydraulic control module.
Further, be provided with oil purifier between the filler opening of the filler opening of hydraulicchange-over valve and hydraulic control module.
Further, also comprise second relief valve in the hydraulic control module, the import of second relief valve is connected with the hydraulic fluid port of accumulator, and the outlet of second relief valve is connected with the return opening of hydraulic control module.
Further, be provided with second one-way valve between first oil outlet of hydraulicchange-over valve and the hydraulic fluid port of accumulator, the import of second one-way valve is connected with first oil outlet of hydraulicchange-over valve, and the outlet of second one-way valve is connected with the hydraulic fluid port of accumulator.
Further, be provided with damping between the hydraulic fluid port of the control port of hydraulicchange-over valve and accumulator.
Further, this hydraulic control module also comprises the pressure measurement hydraulic fluid port, is communicated with actuator port, is used to detect the delivery pressure of hydraulic control module.
Further, valve is the 2/2-way solenoid valve.
According to another aspect of the present invention, a kind of hydraulic control system is provided, has comprised: one or more hydraulicdirectional control valves, be arranged in the working connection of hydraulic control system, be respectively arranged with a relief valve in each actuator port of each hydraulicdirectional control valve; And one or more guide's reduction valve, also comprising above-mentioned any hydraulic control module, each the off-load mouth in the hydraulic control module is connected with the telecontrol mouth of a relief valve; The actuator port of each guide's reduction valve is connected to the control port of surging of a hydraulicdirectional control valve respectively.
According to a further aspect of the invention, a kind of engineering machinery is provided also, it has above-mentioned hydraulic control system.
The present invention has following beneficial effect:
1. in the hydraulic control module of the present invention; Two hydraulic fluid ports of 2/2-way solenoid valve connect return opening and off-load mouth of hydraulic control module respectively; Make from the hydraulic oil in outside the hydraulic control module and the hydraulic element that the off-load mouth is connected with the action through the 2/2-way solenoid valve under emergency and to flow into return opening via off-load mouth, 2/2-way solenoid valve in order; Played under the emergency effect, thereby guaranteed the hydraulic control system failsafe the hydraulic element off-loads.
When being arranged on this hydraulic control module in the hydraulic control system of the present invention; Off-load mouth in the hydraulic control module is connected with the telecontrol mouth of relief valve, and the actuator port of each the guide's reduction valve in the hydraulic control system is connected directly to the control port of surging of a hydraulicdirectional control valve respectively.Like this, the action through the 2/2-way solenoid valve under emergency was lost efficacy relief valve, and then gave the actuator port emptying of hydraulic pressure selector valve, thereby even the spool fault of this hydraulicdirectional control valve and blocking can guarantee that also respective execution mechanisms stops action.And in such technological scheme; The actuator port of each guide's reduction valve is connected directly to the control port of surging of a hydraulicdirectional control valve respectively; Simplified the oil circuit of whole hydraulic control system, made it process more easily, the more difficult residual impurity that stays; And making the fluid process of flowing through of control system simplify, institute is influenced less.
2. the control port of the hydraulicchange-over valve in the hydraulic control module of the present invention is connected with the hydraulic fluid port of accumulator; The filler opening of hydraulicchange-over valve is connected with the filler opening of hydraulic control module; First oil outlet of hydraulicchange-over valve is connected with the hydraulic fluid port of accumulator, and second oil outlet is connected with the return opening of hydraulic control module, like this; Just make that after energy storage pressure reaches setting value the hydraulicchange-over valve switching-over makes the fluid of oil pump output flow back to fuel tank through return opening.When if energy storage pressure is not enough, the hydraulicchange-over valve switching-over makes pump be pressurized to setting value to it once more.This just makes oil pump when accumulator reaches setting value, to quit work, and has reduced the load of oil pump, has played energy-conservation effect.
Except top described purpose, feature and advantage, the present invention also has other purpose, feature and advantage.To do further detailed explanation to the present invention with reference to figure below.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the linkage structure schematic representation of hydraulic control system according to an embodiment of the 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 1, hydraulic control module 3 comprises oil inlet P, actuator port C, oil return inlet T, valve Y2, Y3 and off-load mouth according to an embodiment of the invention.Oil inlet P is connected to the oil pump (not shown).Actuator port C is connected to the hydraulic element outside the hydraulic control module 3, supplies with hydraulic oil to it.The filler opening of each valve Y2, Y3 is connected to one or more off-load mouths, and in the present embodiment, valve Y2 is connected to and is positioned at top-right two unloading ports, and valve Y3 is connected to and is positioned at bottom-right four unloading ports.The oil outlet of each 2/2-way solenoid valve Y2, Y3 is connected to oil return inlet T.When this hydraulic control module 3 is arranged in the hydraulic control system; When forming a part of in the hydraulic control system; Action through valve Y2, Y3 under emergency can make from the hydraulic oil in outside the hydraulic control module 3 and the hydraulic element that the off-load mouth is connected and flow into oil return inlet T via off-load mouth, valve Y2 or valve Y3 in order; Played under the emergency effect, thereby guaranteed the hydraulic control system failsafe corresponding hydraulic element off-load.
From figure, can see; In the present embodiment, this valve Y2, Y3 are the 2/2-way Solenoid ball valve, the oil circuit of conducting off-load mouth to valve when its dead electricity; In practice; This valve also can be common 2/2-way solenoid valve, oil circuit is broken off the oil circuit of conducting off-load mouth to valve during dead electricity when electric; Even this valve can also be hydraulicdirectional control valve, as long as it allows when realizing electricly hydraulic oil to flow into the function of return opening in order via off-load mouth, valve.
Be provided with above-mentioned hydraulic control module 3 according to an embodiment of the invention in the hydraulic control system.As shown in Figure 1, except that hydraulic control module 3, also comprise one or more hydraulicdirectional control valves 1 and one or more guide's reduction valve 2 in this hydraulic control system.Wherein, each hydraulicdirectional control valve 1 is arranged in the working connection (not shown) of hydraulic control system, controls the break-make of corresponding working connection, and then indirect actuator such as the oil cylinder 4 that is connected with working connection of control or oil hydraulic motor 5.Be respectively arranged with a relief valve 11 in each actuator port 12 of each hydraulicdirectional control valve 1; Each guide's reduction valve 2 is used to control the action of a hydraulicdirectional control valve.The more important thing is that in hydraulic control system of the present invention, the actuator port of each guide's reduction valve 2 is connected to the control port of surging of a hydraulicdirectional control valve 1 respectively; Each off-load mouth is connected with the telecontrol mouth of a relief valve 11.
Be appreciated that; With above-mentioned technological scheme; Through making 2/2-way solenoid valve Y2, Y3 dead electricity can make the telecontrol mouth of corresponding flooding valve 11 be communicated to oil return inlet T, and then relief valve 11 lost efficacy under emergency, thereby gave the actuator port emptying of corresponding hydraulicdirectional control valve 1; Even thereby the spool fault of this hydraulicdirectional control valve 1 and blocking can guarantee that also respective execution mechanisms stops action.And in such hydraulic control system; The actuator port of each guide's reduction valve 2 is connected directly to the control port of surging of a hydraulicdirectional control valve 1 respectively; Simplified the oil circuit of whole hydraulic control system, made it process more easily, the more difficult residual impurity that stays; And making the fluid process of flowing through of control system simplify, institute is influenced less.
Preferably, as shown in Figure 1, in the hydraulic control module 3 of present embodiment, each off-load mouth is formed by an one-way valve, and the filler opening of each 2/2-way solenoid valve Y2, Y3 is connected to the outlet of one or more one-way valves.The flow direction of hydraulic oil when this one-way valve has guaranteed under the emergency corresponding hydraulic element off-load.Accordingly, in the hydraulic control system of present embodiment, the import of each one-way valve is connected to the telecontrol mouth of a relief valve 11.In the present embodiment, one-way valve comprises the first one-way valve V1, the second one-way valve V2, the 3rd one-way valve V3, the 4th one-way valve V4, the 5th one-way valve V5 and the 6th one-way valve V6.Wherein, In the present embodiment; The outlet of the first one-way valve V1, the second one-way valve V2 all is connected to the filler opening of 2/2-way solenoid valve Y2, and the outlet of the 3rd one-way valve V3, the 4th one-way valve V4, the 5th one-way valve V5 and the 6th one-way valve V6 is connected to the filler opening of 2/2-way solenoid valve Y3.Hydraulic oil was from the flow direction of relief valve 11 to oil return inlet T when one-way valve had guaranteed relief valve 11 overflows.
More preferably, in the hydraulic control module 3 of present embodiment, the off-load mouth is arranged on the outer edge of hydraulic control module 3, convenient assembling and disassembling; And when the 2/2-way solenoid valve lost efficacy and can't by the time, can manually one-way valve be blocked, temporarily guarantee the action of actuator, and then make the work of whole hydraulic control system safer
In the present embodiment, also comprise accumulator 31, two-bit triplet solenoid valve Y1 and hydraulicchange-over valve 36 in the hydraulic control module 3.The control port 361 of hydraulicchange-over valve 36 is connected with the hydraulic fluid port of accumulator 31; Its filler opening 362 is connected with the oil inlet P of hydraulic control module 3; Its first oil outlet 363 is connected with the hydraulic fluid port of accumulator 31, and second oil outlet 364 is connected with the oil return inlet T of hydraulic control module 3.Like this, just make that after the pressure of accumulator 31 reaches setting value hydraulicchange-over valve 36 switching-overs make the fluid of oil pump (not shown, as to be connected with oil inlet P) output flow back to the fuel tank (not shown) through oil return inlet T.When if accumulator 31 pressure are not enough, hydraulicchange-over valve 36 switching-overs make oil pump be pressurized to setting value to it once more.This just makes oil pump when accumulator 31 reaches setting value, to quit work, and has reduced the load of oil pump, has played energy-conservation effect.
In addition, the first filler opening Y11 of two-bit triplet solenoid valve Y1 is connected to the oil return inlet T of hydraulic control module 3, and its second filler opening Y12 is connected to the hydraulic fluid port of accumulator 31, and its oil outlet Y13 is connected to the actuator port C of hydraulic control module 3.Be appreciated that to get electricly as two-bit triplet solenoid valve Y1 that then the hydraulic oil from accumulator 31 is supplied to actuator port C, and then is supplied to each guide's reduction valve 2; When urgency takes place, can make two-bit triplet solenoid valve Y1 dead electricity, then supply with the hydraulic oil that the guide subtracts valve 2 and be relaxed to oil return inlet T, guaranteed that all actuators stop action.
More preferably, be provided with oil purifier 35 between the filler opening 362 of hydraulicchange-over valve 36 and the oil inlet P of hydraulic control module 3, to purify hydraulic oil.
More preferably, also comprise second relief valve 33 in the hydraulic control module 3, the import of this second relief valve 33 is connected with the hydraulic fluid port of accumulator 31, and the outlet of second relief valve 33 is connected with the oil return inlet T of hydraulic control module 3.When accumulator 31 pressure surpass setting value and reasons such as hydraulicchange-over valve 6 failover can not commutate the time, the fluid of oil pump output can flow back to fuel tank through second relief valve 33, has guaranteed the work safety of oil pump.
In addition; In the present embodiment; The import that is provided with second one-way valve, 37, the second one-way valves 37 between first oil outlet 363 of hydraulicchange-over valve 36 and the hydraulic fluid port of accumulator 31 is connected with first oil outlet 363 of hydraulicchange-over valve 36, and the outlet of second one-way valve 37 is connected with the hydraulic fluid port of accumulator 31.This second one-way valve 37 has guaranteed that hydraulic oil is from the flow direction of oil pump to accumulator 31.
In the present embodiment, preferably, be provided with damping 34 between the control port 361 of hydraulicchange-over valve 36 and the hydraulic fluid port of accumulator 31.
Can also see that from Fig. 1 also comprise pressure measurement hydraulic fluid port M in the hydraulic control module 3, C is communicated with actuator port, is used to detect the delivery pressure of hydraulic control module 3.
The present invention also provides a kind of engineering machinery, hoist for example, and it has above-mentioned any hydraulic control system.
With this hydraulic control system is that the hydraulic control system of hoist is an example, describes the working procedure of the hydraulic control system of present embodiment:
If make the hoist proper functioning, then two-bit triplet solenoid valve Y1,2/2-way solenoid valve Y2, Y3 need all the time.
When tight situation takes place in hoist, two-bit triplet solenoid valve Y1,2/2-way solenoid valve Y2, Y3 dead electricity, corresponding relief valve 11 is relaxed, and the action of hoist is by control fully; And when hydraulicchange-over valve 1 spool blocks, can guarantee that also the corresponding action of hoist stops.
When hoist generation wire rope pulleying or when overload, 2/2-way solenoid valve Y3 dead electricity, corresponding relief valve 11 is relaxed, corresponding action is controlled, hoist can not fall luffing, play elevator and stretch out arm; And when corresponding hydraulicchange-over valve 11 spools block, also can guarantee the luffing that falls, an elevator of hoist and stretch out the arm action to stop.
When crane rope took place to put, 2/2-way solenoid valve Y2 dead electricity, corresponding relief valve 11 is relaxed, and corresponding action is controlled, and hoist can not be transferred wire rope again.And when the hydraulicchange-over valve spool blocked, the doff that also can guarantee hoist was raised action and is stopped.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. a hydraulic control module (3) comprising:
Filler opening (P) is connected to oil pump;
Actuator port (C);
Return opening (T),
It is characterized in that, also comprise:
One or more off-load mouths; And
One or more valves (Y2, Y3), the filler opening of each said valve (Y2, Y3) is connected to one or more
Said off-load mouth, the oil outlet of each said valve (Y2, Y3) is connected to said return opening (T);
Accumulator (31);
Hydraulicchange-over valve (36); Its control port (361) is connected with the hydraulic fluid port of said accumulator (31); Its filler opening (362) is connected with the filler opening (P) of said hydraulic control module (3); Its first oil outlet (363) is connected with the hydraulic fluid port of said accumulator (31), and its second oil outlet (364) is connected with the return opening (T) of said hydraulic control module (3).
2. hydraulic control module according to claim 1 (3) is characterized in that, each said off-load mouth is formed by an one-way valve, and the filler opening of each said valve (Y2, Y3) is connected to the outlet of one or more said one-way valves.
3. hydraulic control module according to claim 1 (3) is characterized in that said off-load mouth is arranged on the outer edge of said hydraulic control module (3).
4. hydraulic control module according to claim 1 (3) is characterized in that, also comprises:
Two-bit triplet solenoid valve (Y1); Its first filler opening (Y11) is connected to the return opening (T) of said hydraulic control module (3); Its second filler opening (Y12) is connected to the hydraulic fluid port of said accumulator (31), and its oil outlet (Y13) is connected to the actuator port (C) of said hydraulic control module (3).
5. according to claim 1 or 4 described hydraulic control modules (3), it is characterized in that, be provided with oil purifier (35) between the filler opening (362) of said hydraulicchange-over valve (36) and the filler opening (P) of said hydraulic control module (3).
6. according to claim 1 or 4 described hydraulic control modules (3); It is characterized in that; Also comprise second relief valve (33) in the said hydraulic control module (3); The import of said second relief valve (33) is connected with the hydraulic fluid port of said accumulator (31), and the outlet of said second relief valve (33) is connected with the return opening (T) of said hydraulic control module (3).
7. according to claim 1 or 4 described hydraulic control modules (3); It is characterized in that; Be provided with second one-way valve (37) between first oil outlet (363) of said hydraulicchange-over valve (36) and the hydraulic fluid port of said accumulator (31); The import of said second one-way valve (37) is connected with first oil outlet (363) of said hydraulicchange-over valve (36), and the outlet of said second one-way valve (37) is connected with the hydraulic fluid port of said accumulator (31).
8. according to claim 1 or 4 described hydraulic control modules (3), it is characterized in that, be provided with damping (34) between the control port (361) of said hydraulicchange-over valve (36) and the hydraulic fluid port of said accumulator (31).
9. hydraulic control module according to claim 1 (3) is characterized in that, also comprises pressure measurement hydraulic fluid port (M), and (C) is communicated with said actuator port, is used to detect the delivery pressure of said hydraulic control module (3).
10. hydraulic control module according to claim 1 (3) is characterized in that, said valve (Y2, Y3) is the 2/2-way solenoid valve.
11. a hydraulic control system comprises:
One or more hydraulicdirectional control valves (1) are arranged in the working connection of said hydraulic control system, are respectively arranged with a relief valve (11) in each actuator port (12) of each said hydraulicdirectional control valve (1); And
One or more guide's reduction valve (2),
It is characterized in that,
Also comprise any one described hydraulic control module (3) among the claim 1-10, the said off-load mouth of each in the said hydraulic control module (3) is connected with the telecontrol mouth of a said relief valve (11);
The actuator port of each said guide's reduction valve (2) is connected to the control port of surging of a said hydraulicdirectional control valve (1) respectively.
12. an engineering machinery is characterized in that, has the described hydraulic control system of claim 11.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110132420 CN102182715B (en) | 2011-05-20 | 2011-05-20 | Hydraulic control system, hydraulic control module thereof and engineering machinery with hydraulic control system |
| PCT/CN2011/078288 WO2012159374A1 (en) | 2011-05-20 | 2011-08-11 | Hydraulic control system and hydraulic control module thereof and engineering machine having the system |
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| CN 201110132420 CN102182715B (en) | 2011-05-20 | 2011-05-20 | Hydraulic control system, hydraulic control module thereof and engineering machinery with hydraulic control system |
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| CN102182715A CN102182715A (en) | 2011-09-14 |
| CN102182715B true CN102182715B (en) | 2012-11-14 |
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| CN103010069B (en) * | 2011-09-22 | 2015-09-30 | 上海宝冶集团有限公司 | For the electrohydraulic control system of bucket crane |
| CN102518608B (en) * | 2011-12-30 | 2014-07-16 | 常德中联重科液压有限公司 | Hydraulic control loop |
| CN102718145B (en) * | 2012-03-23 | 2015-05-20 | 昆山三一机械有限公司 | Crawler crane modularized hydraulic system and crane comparing same |
| CN116733798B (en) * | 2023-08-16 | 2023-11-07 | 湖南星邦智能装备股份有限公司 | Aerial working platform and floating control system thereof |
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| US5456077A (en) * | 1994-04-22 | 1995-10-10 | Mcneilus Truck And Manufacturing, Inc. | Remote unloader hydraulic valve system |
| CN2663214Y (en) * | 2003-07-04 | 2004-12-15 | 江苏省机电研究所有限公司 | Hydraulic automatic amplitude limiting apparatus |
| CN1563726A (en) * | 2004-04-08 | 2005-01-12 | 兰州理工大学 | Hydraulic system for braking lifting platform and unloading when no load |
| CN201325841Y (en) * | 2008-12-19 | 2009-10-14 | 上海三一科技有限公司 | High-low pressure switching hydraulic system for preventing back tilting of caterpillar crane jib |
| CN201459580U (en) * | 2009-07-07 | 2010-05-12 | 江苏四明工程机械有限公司 | Hydraulic unloading control system of border stone slip-form machine |
| CN201427169Y (en) * | 2009-07-10 | 2010-03-24 | 沈阳重型机械集团有限责任公司 | Proportional relief circuit of high-speed forging hydraulic press |
| CN102011762A (en) * | 2010-12-16 | 2011-04-13 | 广州华研精密机械有限公司 | Backpressure and rapid pressure-relieving control device for hydraulic cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012159374A1 (en) | 2012-11-29 |
| CN102182715A (en) | 2011-09-14 |
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