CN102506030A - Multi-way valve and tunnel boring machine - Google Patents
Multi-way valve and tunnel boring machine Download PDFInfo
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- CN102506030A CN102506030A CN2011102867949A CN201110286794A CN102506030A CN 102506030 A CN102506030 A CN 102506030A CN 2011102867949 A CN2011102867949 A CN 2011102867949A CN 201110286794 A CN201110286794 A CN 201110286794A CN 102506030 A CN102506030 A CN 102506030A
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Abstract
The invention provides a multi-way valve and a tunnel boring machine. The multi-way valve comprises a main oil inlet, an oil inlet control port, a main oil return port, a main oil drainage port and a plurality of reversing valve groups, wherein the reversing valve groups are used for controlling actuating elements respectively. Each reversing valve group is provided with a pilot-operated reversing valve and an electromagnetic reversing valve. The pilot-operated reversing valve comprises a first oil inlet, a first oil return port and two first working ports, hydraulic oil pumped from the main oil inlet is led into the first oil inlet, and the first working ports are connected with the actuating elements. The electromagnetic reversing valve comprises a second oil inlet, a first oil drainage port and two second working ports, hydraulic oil pumped from the oil inlet control port is led into the second oil inlet, and the second working ports are connected to two ends of the pilot-operated reversing valve to realize reversing thereof. Compared with the prior art, the multi-way valve has the advantages that the requirement to cleanliness of hydraulic oil is low, feedback oil ways are not easy to be blocked, automatic control is easy to realize and the like.
Description
Technical field
The present invention relates to hydraulic pressure and Coal Mechanical field, specifically, relate to a kind of multi-way valve, and the development machine that comprises this multi-way valve.
Background technique
The development machine multi-way valve is used to control the flow direction and the flow size of hydraulic oil between the oil pump and a plurality of executive component of development machine hydraulic system, thereby controls the direction of action and the speed of each executive component.
In the existing technology, the development machine multi-way valve is mainly manual proportional multi-path valve or hydraulic control proportional multi-path valve, and this type of multi-way valve mainly adopts the integrated mounting type of split blade type.Shown in Figure 1 is a kind of hydraulic schematic diagram of monolithic valve body of existing structure multi-way valve, two ends E ', F ' that this monolithic valve body can control actuating component.Each sheet valve body comprises proportional reversing valve 1 ', pressure-compensated valve 5 ', the shuttle valve of being made up of valve piece and proportional valve spool 6 ' (also possibly comprise relief valve), and comprises total oil inlet P ', total oil return inlet T ' with feed back hydraulic fluid port Ls '.Its level of integration is high, compact structure, has load-sensitive, pressure compensation and proportional control function.
Yet there is following defective in multi-way valve of the prior art:
1) because the multi-way valve main valve plug adopts proportional valve spool, spool and valve body quality of fit require high, and the loop of executive component can be brought the pollutant in the executive component in the proportional valve spool into, causes the spool clamping stagnation.
2) have the elongated orifice of feeding back usefulness on the spool of proportional reversing valve, to connect feedback hydraulic fluid port Ls ' through shuttle valve 6 '.This elongated orifice is easy to blocked, thereby causes feedback pressure signal to lose efficacy.
3) multi-way valve adopts manually or the hydraulic control control mode, can not realize electric automatic control, system complex.
Summary of the invention
In order to overcome the above-mentioned defective and the deficiency of existing technology scheme, the object of the present invention is to provide a kind of multi-way valve, this multi-way valve can reduce in the using process requirement to turbidity test, reduces spool clamping stagnation, plugging fault.In addition, the present invention can also prevent the obstruction of feedback loop, avoids feedback signal not smooth.In addition, the present invention also can realize electric automatization control through adopting electric-hydraulic proportion control, simplifies hydraulic system.
Multi-way valve of the present invention; Comprise total filler opening, control oil filler opening, total return opening, total drain tap and a plurality of selector valve group of control actuating component respectively; Said each selector valve group comprises a plurality of valve assemblys; Said total return opening connects the return opening of valve assembly, and said total drain tap connects the drain tap of valve assembly, and each selector valve group is provided with:
The pilot operated directional control valve that comprises first filler opening, first return opening and two first actuator ports, said first filler opening feeds the hydraulic oil that pumps into from total filler opening, and said first actuator port connects executive component;
The solenoid directional control valve that comprises second filler opening, first drain tap and two second actuator ports, said second filler opening feed from controlling the hydraulic oil that oily filler opening pumps into, and said second actuator port connects the two ends of pilot operated directional control valve to control its switching-over.
Preferred as technique scheme also is provided with between said first filler opening and the total filler opening:
The hydraulic control proportional flow control valve that comprises the 3rd filler opening, first oil outlet, second drain tap and control end, said the 3rd filler opening connects total filler opening, and said first oil outlet connects first filler opening;
The solenoid-operated proportional reduction valve that comprises the 4th filler opening, second oil outlet and the 3rd drain tap, said the 4th filler opening connect the oily filler opening of control, and said second oil outlet connects the control end of said hydraulic control proportional flow control valve to control its flow.
Preferred as technique scheme also is provided with between said the 3rd filler opening and the total filler opening:
The pressure-compensated valve that comprises the 5th filler opening, the 3rd oil outlet and feedback end; Said the 5th filler opening and the 3rd oil outlet are arranged on the oil circuit between total filler opening and the 3rd filler opening, and said feedback end connects the oil circuit between first oil outlet and first filler opening.
Preferred as technique scheme, said each selector valve group also is provided with:
The one-way valve that comprises the 6th filler opening and the 4th oil outlet; Said the 6th filler opening connects the oil circuit between first oil outlet and first filler opening; Said the 4th oil outlet connects the feedback hydraulic fluid port with the stroking mechanism feedback signal to variable displacement pump, and the 4th oil outlet of said each selector valve group is communicated with.
Preferred as technique scheme, said each selector valve group also is provided with:
The relief valve that comprises the 7th filler opening and second return opening, said the 7th filler opening connects the oil circuit that gets into the 6th filler opening.
Preferred as technique scheme, said each selector valve group also is provided with:
Orifice plug, said orifice plug are arranged on the oil circuit that gets into the 7th filler opening.
Preferred as technique scheme, said multi-way valve also is provided with:
The safety valve that comprises the 8th filler opening and the 3rd return opening, said the 8th filler opening connect from the oil circuit of total filler opening to selector valve group pump oil, and when total filler opening pressure was higher than predefined value, hydraulic oil got into fuel tank from the 3rd return opening.
Preferred as technique scheme, said the 8th filler opening one side and/or second oil outlet, one side also are provided with pressure-detecting device.
Preferred as technique scheme, said selector valve group comprises 4 groups, controls 4 group actor spares respectively.
Another object of the present invention is to provide a kind of development machine, and this development machine comprises aforesaid multi-way valve.
Compared with prior art; The present invention can adopt the strong industrial switch type pilot operated directional control valve of contamination resistance; The oil return hydraulic oil of executive component is through the direct oil sump tank of pilot operated directional control valve; Can avoid the impurity in the executive component oil return to get into spool, its spool is difficult for clamping stagnation, and has reduced the requirement to oil cleanliness; In addition; The present invention is used for the hydraulic oil of feedback pressure signal and between hydraulic control proportional flow control valve and pilot operated directional control valve, gets oil; Feed back to the stroking mechanism of variable displacement pump through one-way valve, need walk the elongated orifices of Proportional valve spool unlike existing technology, so its feedback oil circuit is difficult for stopping up; And the present invention can carry out Electromagnetic Control to solenoid-operated proportional reduction valve and solenoid directional control valve, under the prerequisite that guarantees functions such as multi-way valve load-sensitive, pressure compensation and solenoid-operated proportional, can realize electric automatization control, simplifies hydraulic system.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technological scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the hydraulic schematic diagram of the monolithic valve body of existing structure multi-way valve;
Fig. 2 is the hydraulic schematic diagram of the multi-way valve of one embodiment of the invention;
Fig. 3 is the hydraulic schematic diagram of the selector valve group of multi-way valve embodiment illustrated in fig. 2.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technological scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiments.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment who is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Shown in Figure 2 is the hydraulic schematic diagram of the multi-way valve of one embodiment of the invention.Should be understood that this multi-way valve can be applied to include but not limited to development machine in the hydraulic system of multiple machinery.In the time of in being applied to development machine, this multi-way valve can be used to control the executive component of development machine.
As shown in Figure 2, multi-way valve of the present invention comprises total oil inlet P, the oily oil inlet P of control 1, total oil return inlet T, total drain tap Y and a plurality of selector valve group B of control actuating component respectively at least.Total oil inlet P of the present invention is used to pump into the hydraulic oil of working oil path, and this working oil path gets into two end interfaces of executive component to drive its action.The oily filler opening of control of the present invention is used to pump into the hydraulic oil of control oil channel, and the hydraulic oil of this control oil channel is independent of working oil path.
Each selector valve group B comprises a plurality of valve assemblys, and total oil return inlet T connects the return opening of valve assembly, and total drain tap Y connects the drain tap of valve assembly.Should be understood that the present invention is not that all valve assemblys all have return opening or drain tap, comprise that the valve assembly of each interface such as return opening or drain tap will display hereinafter in detail.
Each selector valve group B is control actuating component respectively.As an embodiment, selector valve group B comprises 4 groups (being respectively B1, B2, B3, B4), controls 4 group actor spares respectively.This 4 group actor spare can be respectively left and right sides running motor, hoist cylinder and the angling cylinder like development machine.In Fig. 1, the interface of each executive component is E1, F1 respectively; E2, F2; E3, F3; E4, F4.Each interface can be like the rod chamber of oil cylinder and rodless cavity, or the filler opening of oil hydraulic motor and oil outlet.Should be understood that when adopting the selector valve group B of other quantity, can realize technique effect of the present invention equally, the present invention is not limited to this.
Multi-way valve of the present invention can also comprise safety valve as shown in Figure 19 except comprising aforementioned many group selector valve group B.This safety valve 9 comprises filler opening (the 8th filler opening) and return opening (the 3rd return opening); The filler opening of this safety valve 9 connects from the oil circuit of total oil inlet P to selector valve group B pump oil; When total oil inlet P pressure was higher than predefined value, hydraulic oil got into fuel tank from the return opening of safety valve 9.This safety valve 9 can prevent the damage that the overpressure of the working oil path in the multi-way valve causes valve assembly.In addition, can also be provided with pressure-detecting device in filler opening one side (being the M mouth shown in Fig. 2) of safety valve 9, so that detect oil pressure.
As shown in Figure 3, the selector valve group B of one embodiment of the invention is provided with pilot operated directional control valve 1 and solenoid directional control valve 2 at least.Wherein, pilot operated directional control valve 1 comprises first filler opening, first return opening and two first actuator ports, and first filler opening feeds the hydraulic oil that pumps into from total oil inlet P, and first actuator port connects executive component.
Solenoid directional control valve 2 comprises second filler opening, first drain tap and two second actuator ports, and second filler opening feeds from controlling the hydraulic oil that oily oil inlet P 1 pumps into, and second actuator port connects the two ends of pilot operated directional control valve 1 to control its switching-over.
Pilot operated directional control valve 1 and solenoid directional control valve 2 are all as the valve assembly of selector valve group B, and first return opening wherein connects total oil return inlet T, and first drain tap connects total drain tap Y.
Under a working state; Through solenoid directional control valve 2 is adopted Electromagnetic Control; Can control the turnover oil direction of its second actuator port; In pilot operated directional control valve 1 upper end oil-feed, when the lower end is fuel-displaced (with orientation shown in Figure 3), the spool of pilot operated directional control valve 1 moves down, thereby can realize the switching-over (such as can be so that the oil-feed of E1 mouth, the F1 mouth of executive component are fuel-displaced) of 1 one directions of pilot operated directional control valve; Under another working state, control solenoid directional control valve 2 is towards above-mentioned opposite direction turnover oil, and the spool of pilot operated directional control valve 1 moves up, thus motion that can another direction of driving execution element.Therefore, pilot operated directional control valve 1 of the present invention uses solenoid directional control valve 2 as pilot-actuated valve control, has realized its commutation function.
In addition, the hydraulic oil of first filler opening feeding can pass through proportional control.Thereby can realize getting into the control of the flow of the hydraulic oil in hydraulic control Proportional valve and the executive component, and then realize speed-regulating function.
Should be understood that; Pilot operated directional control valve 1 of the present invention can adopt the strong industrial switch type pilot operated directional control valve 1 of contamination resistance, rather than uses the strict Proportional valve of turbidity test as main reversing valve, and the oil return hydraulic oil of executive component is through pilot operated directional control valve 1 direct oil sump tank; Need pass through the spool of Proportional valve unlike existing technology; Can avoid the impurity in the executive component oil return to get into spool, its spool is difficult for clamping stagnation, and has reduced the requirement to oil cleanliness.
Also should be understood that; The hydraulic oil of control oil channel of pilot operated directional control valve 1 of flowing through is independent of working oil path; The hydraulic oil of this control oil channel can pass through independent filtration, can't receive the pollution of executive component without executive component, so the present invention also can guarantee the turbidity test of control oil channel.
The hydraulic oil that the present invention gets into first filler opening can adopt the proportional control of multiple mode.Preferably, of the present inventionly between first filler opening and total oil inlet P, also be provided with hydraulic control proportional flow control valve as shown in Figure 33 and solenoid-operated proportional reduction valve 4.Wherein, hydraulic control proportional flow control valve 3 comprises the 3rd filler opening, first oil outlet, second drain tap and control end, and the 3rd filler opening connects total oil inlet P, and first oil outlet connects first filler opening.
Solenoid-operated proportional reduction valve 4 comprises the 4th filler opening, second oil outlet and the 3rd drain tap, and the 4th filler opening connects the control end of oily oil inlet P 1, the second oil outlet connection of control hydraulic control proportional flow control valve 3 to control its flow.
Preferably, second oil outlet, one side (being depicted as the M1 mouth as 3) can also be provided with pressure-detecting device, so that detect oil pressure.
Solenoid-operated proportional reduction valve 4 can be according to the delivery pressure of big or small pro rata adjusting second oil outlet of control electric current, and hydraulic control proportional flow control valve 3 is according to the size of the second oil outlet delivery pressure output flow of modulating valve in proportion.Through the control of 4 pairs of hydraulic control proportional flow control valves 3 of solenoid-operated proportional reduction valve, can realize solenoid-operated proportional control function, not only be easy to realize electric automatization, and simplified hydraulic system.
When the load of executive component changes, can cause that the pressure reduction at hydraulic control proportional flow control valve 3 two ends changes, thereby cause fluid flow to change, finally make the movement velocity of executive component depart from the variation of predefined value, thereby reduce control accuracy.In order to make multi-way valve of the present invention be applied to the occasion that degree of regulation is had relatively high expectations, multi-way valve of the present invention also has pressure compensated function.Correspondingly, also be provided with pressure-compensated valve 5 between the 3rd filler opening and the total oil inlet P.
This pressure-compensated valve 5 comprises the 5th filler opening, the 3rd oil outlet and feedback end.Wherein, the 5th filler opening and the 3rd oil outlet are arranged on the oil circuit between total oil inlet P and the 3rd filler opening, and feedback end connects the oil circuit between first oil outlet and first filler opening.The pressure reduction that this pressure-compensated valve 5 can be controlled between the 3rd filler opening and first oil outlet is constant; Thereby make no matter how load changes; Can keep the flow unchanged of hydraulic control proportional flow control valve 3, thereby make the movement velocity of executive component not receive the influence of the fluctuation of load.
In addition, the present invention can also adjust the flow of variable displacement pump according to the variation of load, improves hydraulic system whole energy effect.Correspondingly, multi-way valve has the loop of feedback pressure signal, and each selector valve group B also is provided with one-way valve as shown in Figure 36.This one-way valve 6 comprises the 6th filler opening and the 4th oil outlet; The 6th filler opening connects the oil circuit between first oil outlet and first filler opening; The 4th oil outlet connects feedback hydraulic fluid port Ls with the stroking mechanism feedback signal to variable displacement pump, and the 4th oil outlet of each selector valve group B is communicated with.
One-way valve 6 of the present invention can adopt cone valve structure.In addition,, be equivalent to shuttle valve on the whole, can compare the maximum pressure in each selector valve group B, and can feed back this maximum pressure to stroking mechanism because the 4th oil outlet of each selector valve group B is communicated with.This stroking mechanism can change the swash plate slope or the stator throw of eccentric of variable displacement pump according to maximum pressure, thereby changes the flow of variable displacement pump.The present invention is not limited to the structure of variable displacement pump and stroking mechanism.
In addition, for fear of excessive, also be provided with protective gear on this feedback loop to the pressure of stroking mechanism feedback.Correspondingly, each selector valve group B also is provided with relief valve 7, and this relief valve 7 comprises the 7th filler opening and second return opening, and the 7th filler opening connects the oil circuit that gets into the 6th filler opening.When the oil pressure that gets into the 6th filler opening was higher than predefined value, hydraulic oil got into fuel tank from second return opening.
As an embodiment, on the oil circuit that gets into the 7th filler opening, also be provided with orifice plug 8, hydraulic oil is played damping and current stabilization effect.
On the basis of technique scheme; The present invention has not only realized the load-sensitive function; And because the hydraulic oil that the present invention is used for feedback pressure signal is got oil between hydraulic control proportional flow control valve 3 and pilot operated directional control valve 1; Need walk the elongated orifices of Proportional valve spool unlike existing technology, so its feedback oil circuit is difficult for stopping up.
Should be understood that; Multi-way valve of the present invention can adopt machines such as plate valve, screw-in cartridge valve to add and form; Can adopt screw-in cartridge valve such as each valve assembly such as pressure-compensated valve 5, one-way valve 6, relief valve 7; And pilot operated directional control valve 1 can adopt plate valve with solenoid directional control valve 2, and the present invention is not limited to this.
In sum, three loops be can be divided on the multi-way valve principle of the above embodiment of the present invention, work loop, control loop and feedback loop are respectively.
Wherein, work loop hydraulic oil flow is to as follows:
Total oil inlet P → safety valve 9 → pressure-compensated valve 5 → hydraulic control proportional flow control valve 3 → pilot operated directional control valve 1 → executive component.
Control loop is divided into two-way, and its hydraulic oil flow is to distinguishing as follows:
1) master control oil oil inlet P 1 → solenoid-operated proportional reduction valve 4 → hydraulic control proportional flow control valve 3
2) master control oil oil inlet P 1 → solenoid directional control valve 2 → pilot operated directional control valve 1
Feedback loop also divides two-way, and its hydraulic oil flow is to distinguishing as follows:
1) gets oil drop → pressure-compensated valve 5
2) get oil drop → one-way valve 6 → feedback hydraulic fluid port Ls → stroking mechanism
The getting oil drop and can be the oil circuit between hydraulic control proportional flow control valve 3 and the pilot operated directional control valve 1 of above-mentioned two-way feedback oil return.
Except aforementioned multi-way valve, the present invention also provides a kind of development machine that comprises aforementioned multi-way valve.The structure of this development machine can be with reference to existing technology, and this paper repeats no more at this.
Compared with prior art, the present invention has the following advantages at least:
1) oil cleanliness requires low
Pilot operated directional control valve 1 of the present invention can adopt the strong industrial switch type pilot operated directional control valve 1 of contamination resistance; Rather than use the strict Proportional valve of turbidity test as main reversing valve; The oil return hydraulic oil of executive component is through pilot operated directional control valve 1 direct oil sump tank, need pass through the spool of Proportional valve unlike existing technology, can avoid the impurity in the executive component oil return to get into spool; Its spool is difficult for clamping stagnation, and has reduced the requirement to oil cleanliness.
2) the feedback oil circuit is difficult for stopping up
The present invention is used for the hydraulic oil of feedback pressure signal and between hydraulic control proportional flow control valve 3 and pilot operated directional control valve 1, gets oil; Feed back to the stroking mechanism of variable displacement pump through one-way valve 6; Need walk the elongated orifices of Proportional valve spool unlike existing technology, so its feedback oil circuit is difficult for stopping up.
3) easily be automated control
Hydraulic control proportional flow control valve 3 of the present invention can use 4 controls of solenoid-operated proportional reduction valve, and pilot operated directional control valve 1 can use solenoid directional control valve 2 to control as pilot-actuated valve.When controlling solenoid-operated proportional reduction valve 4 with solenoid directional control valve 2 actions simultaneously, multi-way valve is realized switching-over and speed-regulating function.The present invention can realize electric automatization control under the prerequisite that guarantees functions such as multi-way valve load-sensitive, pressure compensation and solenoid-operated proportional, simplify hydraulic system.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. multi-way valve; It is characterized in that; Comprise total filler opening (P), control oily filler opening (P1), total return opening (T), total drain tap (Y) and a plurality of selector valve group (B) of control actuating component respectively, said each selector valve group (B) comprises a plurality of valve assemblys, said total return opening (T) connects the return opening of valve assembly; Said total drain tap (Y) connects the drain tap of valve assembly, and each selector valve group (B) is provided with:
The pilot operated directional control valve (1) that comprises first filler opening, first return opening and two first actuator ports, said first filler opening feeds the hydraulic oil that pumps into from total filler opening (P), and said first actuator port connects executive component;
The solenoid directional control valve (2) that comprises second filler opening, first drain tap and two second actuator ports; Said second filler opening feeds from controlling the hydraulic oil that oily filler opening (P1) pumps into, and said second actuator port connects the two ends of pilot operated directional control valve (1) to control its switching-over.
2. multi-way valve according to claim 1 is characterized in that, also is provided with between said first filler opening and the total filler opening (P):
Comprise the hydraulic control proportional flow control valve (3) of the 3rd filler opening, first oil outlet, second drain tap and control end, said the 3rd filler opening connects total filler opening (P), and said first oil outlet connects first filler opening;
The solenoid-operated proportional reduction valve (4) that comprises the 4th filler opening, second oil outlet and the 3rd drain tap, said the 4th filler opening connect control oily filler opening (P1), and said second oil outlet connects the control end of said hydraulic control proportional flow control valve (3) to control its flow.
3. multi-way valve according to claim 2 is characterized in that, also is provided with between said the 3rd filler opening and the total filler opening (P):
The pressure-compensated valve (5) that comprises the 5th filler opening, the 3rd oil outlet and feedback end; Said the 5th filler opening and the 3rd oil outlet are arranged on the oil circuit between total filler opening (P) and the 3rd filler opening, and said feedback end connects the oil circuit between first oil outlet and first filler opening.
4. multi-way valve according to claim 3 is characterized in that, said each selector valve group (B) also is provided with:
The one-way valve (6) that comprises the 6th filler opening and the 4th oil outlet; Said the 6th filler opening connects the oil circuit between first oil outlet and first filler opening; Said the 4th oil outlet connects feedback hydraulic fluid port (Ls) with the stroking mechanism feedback signal to variable displacement pump, and the 4th oil outlet of said each selector valve group (B) is communicated with.
5. multi-way valve according to claim 4 is characterized in that, said each selector valve group (B) also is provided with:
The relief valve (7) that comprises the 7th filler opening and second return opening, said the 7th filler opening connects the oil circuit that gets into the 6th filler opening.
6. multi-way valve according to claim 5 is characterized in that, said each selector valve group (B) also is provided with:
Orifice plug (8), said orifice plug (8) are arranged on the oil circuit that gets into the 7th filler opening.
7. according to each described multi-way valve of claim 2-6, it is characterized in that said multi-way valve also is provided with:
The safety valve (9) that comprises the 8th filler opening and the 3rd return opening, said the 8th filler opening connect from the oil circuit of total filler opening (P) to selector valve group (B) pump oil, and when pressure was higher than predefined value, hydraulic oil got into fuel tank from the 3rd return opening at total filler opening (P).
8. multi-way valve according to claim 7 is characterized in that, said the 8th filler opening one side and/or second oil outlet, one side also are provided with pressure-detecting device.
9. according to each described multi-way valve of claim 1-6, it is characterized in that said selector valve group (B) comprises 4 groups, controls 4 group actor spares respectively.
10. a development machine is characterized in that, said development machine comprises each described multi-way valve of claim 1-9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110286794.9A CN102506030B (en) | 2011-09-26 | 2011-09-26 | Multi-way valve and tunnel boring machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110286794.9A CN102506030B (en) | 2011-09-26 | 2011-09-26 | Multi-way valve and tunnel boring machine |
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| CN102506030B CN102506030B (en) | 2014-11-19 |
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| CN102900716A (en) * | 2012-11-09 | 2013-01-30 | 常德中联重科液压有限公司 | Feedback speed regulation device and engineering machinery |
| CN104653820A (en) * | 2015-03-17 | 2015-05-27 | 泸州精通流体液压机械有限公司 | Multi-way valve for small-sized excavator |
| CN105402180A (en) * | 2014-08-12 | 2016-03-16 | 徐工集团工程机械股份有限公司 | Proportion multi-way valve, cantilever crane hydraulic control system and concrete pump vehicle |
| CN106438555A (en) * | 2016-12-28 | 2017-02-22 | 徐工集团工程机械有限公司 | Hydraulic control valve and hydraulic system |
| CN111677704A (en) * | 2020-06-18 | 2020-09-18 | 江苏徐工工程机械研究院有限公司 | Hydraulic system and engineering machinery |
| CN114165495A (en) * | 2021-11-23 | 2022-03-11 | 江苏汇智高端工程机械创新中心有限公司 | Multi-way valve with independently controlled working link and valve port and engineering machinery |
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| CN102900716B (en) * | 2012-11-09 | 2015-02-11 | 常德中联重科液压有限公司 | Feedback speed regulation device and engineering machinery |
| CN105402180A (en) * | 2014-08-12 | 2016-03-16 | 徐工集团工程机械股份有限公司 | Proportion multi-way valve, cantilever crane hydraulic control system and concrete pump vehicle |
| CN104653820A (en) * | 2015-03-17 | 2015-05-27 | 泸州精通流体液压机械有限公司 | Multi-way valve for small-sized excavator |
| CN106438555A (en) * | 2016-12-28 | 2017-02-22 | 徐工集团工程机械有限公司 | Hydraulic control valve and hydraulic system |
| CN106438555B (en) * | 2016-12-28 | 2018-10-16 | 徐工集团工程机械有限公司 | Hydraulic control valve and hydraulic system |
| CN111677704A (en) * | 2020-06-18 | 2020-09-18 | 江苏徐工工程机械研究院有限公司 | Hydraulic system and engineering machinery |
| CN111677704B (en) * | 2020-06-18 | 2022-07-19 | 江苏徐工工程机械研究院有限公司 | Hydraulic system and engineering machinery |
| CN114165495A (en) * | 2021-11-23 | 2022-03-11 | 江苏汇智高端工程机械创新中心有限公司 | Multi-way valve with independently controlled working link and valve port and engineering machinery |
| CN114165495B (en) * | 2021-11-23 | 2022-10-18 | 江苏汇智高端工程机械创新中心有限公司 | Multi-way valve with independently controlled working link and valve port and engineering machinery |
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| CN102506030B (en) | 2014-11-19 |
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