CN104047914A - Floating screed control system of paver and paver - Google Patents
Floating screed control system of paver and paver Download PDFInfo
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- CN104047914A CN104047914A CN201410315371.9A CN201410315371A CN104047914A CN 104047914 A CN104047914 A CN 104047914A CN 201410315371 A CN201410315371 A CN 201410315371A CN 104047914 A CN104047914 A CN 104047914A
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- 238000007667 floating Methods 0.000 title claims abstract description 36
- 239000012530 fluid Substances 0.000 claims description 64
- 239000002828 fuel tank Substances 0.000 claims description 16
- 239000003921 oil Substances 0.000 abstract description 58
- 239000010720 hydraulic oil Substances 0.000 abstract description 18
- 238000000034 method Methods 0.000 abstract description 14
- 238000007373 indentation Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Abstract
The invention discloses a floating screed control system of a paver. The floating screed control system of the paver comprises a large arm oil cylinder connected with a screed, an electromagnetic valve connected with the large arm oil cylinder, a flow control valve, a Y-shaped three-position four-way reversing valve, a main overflow valve, a first reversing valve, a second reversing valve, a counterbalance valve and a two-position four-way reversing valve, wherein the flow control valve, the Y-shaped three-position four-way reversing valve and the main overflow valve are arranged in the system. In the paving process, the second reversing valve enables an oil return pipeline and an oil tank to be disconnected, and hydraulic oil in the oil return pipeline returns to the oil tank through the counterbalance valve to enable the oil return pipeline to form system counter pressure. If a vehicle is stopped for pouring materials, due to the fact that the oil return pipeline has the counter pressure, positive pressure is relatively formed in a rod cavity and a rodless cavity, the vacuum degree existing due to the fact that the rod cavity or the rodless cavity is in an oil sucking state is removed, so that a certain degree of sinking or floating of the screed due to the vacuum degree is avoided, the quality influence of indentation and arch cambers on a road surface of the screed in the stopping and starting process of the paver is reduced, and the flatness of the paved road surface is effectively improved. The invention further discloses the paver with the floating screed control system.
Description
Technical field
The present invention relates to engineering machinery hydraulic control field, relate in particular to a kind of paver control of floating ironer system and there is the paver of this system.
Background technique
The expressway construction of China's development is had higher requirement to bituminous concrete paver working performance, especially the increasingly stringent that requires to the flatness paving.First, paver needs the height of screed to regulate before paving,, then, by the paver that sets paving thickness, concrete or asphalt pavement are paved to be applicable to the requirement of different highways to paving thickness by the height that promotes or reduce screed.Most of paver of the prior art adopts ironing-board float to pave, and, in paving process, screed is in quick condition, and the rod chamber and the rodless cavity that are connected to the left and right big arm cylinder of screed both sides are directly communicated with fuel tank.Due to hopper capacity or the quantitative limitation of truck appearance, there is the continuous circulation of parking, batch turning, three steps of starting in paver in paving process.Before parking batch turning, if the screed in quick condition upwards floats, now the rod chamber of left and right big arm cylinder is in oil suction state, and this can make rod chamber have certain vacuum degree, now stop, screed can sink to making road surface because of the degree of vacuum that rod chamber exists and produce impression; If the screed in quick condition floats downwards, now the rodless cavity of left and right big arm cylinder is in oil suction state, this can make rodless cavity have certain vacuum degree, now stops and starts to walk, and screed can and make road surface arch camber because Action of Gravity Field declines because of the degree of vacuum rising of rodless cavity existence; The parking of paver in paving process and starting make impression that road surface produces and arching phenomenon have a strong impact on the flatness on road surface.For impression and arch camber that the starting-up process that reduces to stop causes to road surface, the technical way that those skilled in the art take is:
1, strengthen hopper capacity, reduce stop frequency, these means can only reduce the number of times that the impression on road surface and arch camber occur, and cannot fundamentally solve the impression that brings to road surface because of the starting of stopping and the problem of arch camber.
2, adopt transfer vehicle to carry out paving operation, cost is higher.
Summary of the invention
The above-mentioned technical problem existing in paving process for paver of the prior art, the invention provides a kind of paver control of floating ironer system, the impression that utilizes this system can solve in paving process to cause to paving concrete pavement due to parking and the starting of paver and the problem of arch camber, thus the flatness of paving concrete pavement can effectively be improved.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of paver control of floating ironer system, for controlling the lifting of screed or floating, comprise: be connected to the left big arm cylinder of screed both sides, right big arm cylinder, and two solenoid valves that are connected with the rod chamber of described left big arm cylinder, described right big arm cylinder respectively, each described solenoid valve has two working positions of two-way admittance and unidirectional oil-feed, and described paver control of floating ironer system also comprises:
Flow control valve, described flow control valve is from its hydraulic fluid port A2 to its hydraulic fluid port B2 conducting, from its hydraulic fluid port B2 to its hydraulic fluid port A2 flow rates controlled;
Y type three position four-way directional control valve, the oil inlet P 1 of described Y type three position four-way directional control valve is communicated with main oil pipe road, its oil return inlet T 1 is communicated with return line, its actuator port A1 is communicated with the first oil circuit, described the first oil circuit forms two branch roads and is communicated with the rodless cavity of described left big arm cylinder and right big arm cylinder respectively, and its actuator port B1 is communicated with the hydraulic fluid port A2 of described flow control valve; The hydraulic fluid port B2 of described flow control valve is communicated with the second oil circuit, and described the second oil circuit forms two branch roads and is communicated with the rod chamber of described left big arm cylinder and right big arm cylinder by described solenoid valve respectively;
Main relief valve, is connected between described main oil pipe road and described return line;
The first selector valve, in parallel with described main relief valve, to control the break-make of described main oil pipe road and described return line;
The second selector valve, is connected between described return line and fuel tank, to control the break-make of described return line and fuel tank;
Back pressure valve, in parallel with described the second selector valve, control the pressure of described return line so that system forms back pressure in return line;
Two position and four-way reversing valves, the hydraulic fluid port A3 of described two position and four-way reversing valves and hydraulic fluid port B3 are all communicated with described return line, and its hydraulic fluid port C3 is communicated with described the first oil circuit, and its hydraulic fluid port D3 is communicated with described the second oil circuit; Described two position and four-way reversing valves are in primary importance, hydraulic fluid port A3 and hydraulic fluid port C3 conducting described in it described in it, hydraulic fluid port B3 and hydraulic fluid port D3 conducting described in it described in it; Described two position and four-way reversing valves are in the second place, hydraulic fluid port A3 described in it, and hydraulic fluid port B3, hydraulic fluid port C3 and hydraulic fluid port D3 all close.
Preferably, described back pressure valve is relief valve.
Preferably, described flow control valve is series flow control valve.
Preferably, described two position and four-way reversing valves are two four-way electromagnetic reversing valves.
Preferably, described the first selector valve and the second selector valve are 2/2-way solenoid directional control valve.
Preferably, described Y type three position four-way directional control valve is Y type 3-position 4-way solenoid directional control valve.
The present invention also provides a kind of paver, comprises screed, and described paver has paver control of floating ironer system as above.
Compared with prior art, the beneficial effect of paver control of floating ironer system of the present invention is: paver control of floating ironer system of the present invention is by being connected to the Y type three position four-way directional control valve between main oil pipe road and return line, and the flow control valve being connected between Y type three position four-way directional control valve and left and right big arm cylinder is controlled the rising of screed and declines to regulate the paving thickness of paver, paver control of floating ironer system of the present invention is controlled the pressure in return line by the second selector valve and the back pressure valve in parallel with this second selector valve that are connected between return line and fuel tank, in the time screed highly being regulated before paver paves, this second selector valve makes return line and fuel tank in connected state, can be by the flexible free adjustment screed height of the piston rod of left and right big arm cylinder, in the time that paver is in paving process, the second selector valve disconnects return line and fuel tank, hydraulic oil in the return line back pressure valve of need flowing through just can be got back to fuel tank, back pressure valve makes return line form system back pressure, if now paver parking batch turning, due to left big arm cylinder, the return line that the rod chamber of right big arm cylinder and rodless cavity are communicated with has certain back pressure, the certain positive pressure of corresponding formation in rod chamber and rodless cavity, the certain vacuum degree of having eliminated rod chamber or rodless cavity internal cause in oil suction state (negative pressure state) and exist, thereby prevent because existing degree of vacuum to make screed produce sinking or floating to a certain degree, reduce screed in paver parking starting-up process causes impression and arch camber quality influence to road surface, effectively improve the flatness of paver paving concrete pavement.
Brief description of the drawings
View when Fig. 1 is paver control of floating ironer system control screed lifting of the present invention;
View when Fig. 2 is paver control of floating ironer system control screed decline of the present invention;
Fig. 3 view during in quick condition that is paver control of floating ironer system of the present invention at screed;
Fig. 4 is the structural representation of paver of the present invention.
Embodiment
For making those skilled in the art better understand technological scheme of the present invention, below in conjunction with the drawings and specific embodiments, the present invention is elaborated.
As Figure 1-4, a kind of paver control of floating ironer system disclosed by the invention, comprising:
Left big arm cylinder 1, right big arm cylinder 11, be connected to the both sides of screed 15;
The first solenoid valve 2, second solenoid valve 10 with two working positions of two-way admittance and unidirectional oil-feed, be connected with the rod chamber of left big arm cylinder 1, right big arm cylinder 11 respectively;
From hydraulic fluid port A2 to hydraulic fluid port B2 conducting, from hydraulic fluid port B2 to the limited flow control valve 4 of hydraulic fluid port A2 flow;
Y type three position four-way directional control valve 5, the oil inlet P 1 of Y type three position four-way directional control valve 5 is communicated with main oil pipe road, oil return inlet T 1 is communicated with return line, actuator port A1 is communicated with the first oil circuit 12, the first oil circuit 12 forms two branch roads and is communicated with the rodless cavity of left big arm cylinder 1, right big arm cylinder 11 respectively, and actuator port B1 is communicated with the hydraulic fluid port A2 of flow control valve 4;
The hydraulic fluid port B2 of flow control valve 4 is communicated with the second oil circuit 13, and the second oil circuit 13 forms two branch roads and is communicated with the rod chamber of left big arm cylinder 1, right big arm cylinder 11 by the first solenoid valve 2, the second solenoid valves 10 respectively;
Be connected to the main relief valve 6 between main oil pipe road and return line;
In parallel with main relief valve 6, to control first selector valve 7 of break-make of main oil pipe road and return line;
Be connected between return line and fuel tank, to control second selector valve 8 of break-make of return line and fuel tank;
In parallel with the second selector valve 8, control the pressure of return line so that system forms the back pressure valve 9 of back pressure in return line;
The hydraulic fluid port A3 of two position and four-way reversing valve 3, two position and four-way reversing valves, hydraulic fluid port B3 is all communicated with return line, and hydraulic fluid port C3 is communicated with the first oil circuit, and hydraulic fluid port D3 is communicated with the second oil circuit; Two position and four-way reversing valves 3 are in primary importance, hydraulic fluid port A3 and hydraulic fluid port C3 conducting, and hydraulic fluid port B3 and hydraulic fluid port D3 conducting, two position and four-way reversing valves are in the second place, hydraulic fluid port A3, hydraulic fluid port B3, hydraulic fluid port C3, hydraulic fluid port D3 all closes.
Left big arm cylinder 1, right big arm cylinder 11 are by flexible decline and the rising with control screed 15 of piston rod, thereby regulate the height of screed 15 to make the pave road surface of different-thickness of paver, the piston rod of left big arm cylinder 1, right big arm cylinder 11 is realized flexible by the control of Y type three position four-way directional control valve 5.
The effect of flow control valve 4 is that the steady lifting of the piston by controlling left big arm cylinder 1, right big arm cylinder 11 controls the steady lifting of screed 15; In the time that screed 15 need to rise, hydraulic oil in main oil pipe road enters the hydraulic fluid port A2 of flow control valve 4 via Y type three position four-way directional control valve 5, then be not subject to flowing out from hydraulic fluid port B2 of flow control valve 4 any restrictions, then enter the rod chamber of left big arm cylinder 1, right big arm cylinder 11, under the effect of hydraulic oil so that its piston rod shrink, thereby promote the height of screed 15; When screed 15 need to descend timing, the hydraulic oil of the rod chamber of left big arm cylinder 1, right big arm cylinder 11 enters from the hydraulic fluid port B2 of flow control valve 4, flow out from hydraulic fluid port A2, now the flow velocity of hydraulic oil is subject to flow control valve 4 and limits, to stop because screed 15 is subject to Action of Gravity Field to sink fast, increase stationarity when screed 15 declines.
Should be appreciated that, flow control valve 4 can be common throttle valve or series flow control valve, because series flow control valve can make to produce stable flow by its hydraulic oil, thereby makes the decline of screed 15 more steady, and flow control valve 4 can preferentially be selected series flow control valve.
The effect of main relief valve 6 is to control the working pressure of whole system, i.e. pressure in main oil pipe road.When for a certain reason, when working pressure that in main oil pipe road, the pressure of hydraulic oil sets higher than main relief valve 6, main relief valve 6 starts overflow, in case hydraulic actuator, hydraulic pipe line and the hydraulic control component in locking system overpressure damage system.
In the time that paver paves, if make screed 15 in quick condition, the rod chamber of left big arm cylinder 1, right big arm cylinder 11 need be communicated with directly or indirectly with rodless cavity, for this reason, by two position and four-way reversing valves 3 by rod chamber and rodless cavity indirect communication.
The effect of back pressure valve 9 is, paver is in paving process, screed 15 is all the time in quick condition, now, the second selector valve 8 disconnects return line and fuel tank, hydraulic oil in the return line back pressure valve 9 of need flowing through just can be got back to fuel tank, back pressure valve 9 has certain pilot pressure, and make return line form system back pressure, if now paver parking batch turning, due to left big arm cylinder 1, the return line that the rod chamber of right big arm cylinder 11 and rodless cavity are communicated with has certain back pressure, the certain positive pressure of corresponding formation in rod chamber and rodless cavity, the certain vacuum degree of having eliminated rod chamber or rodless cavity internal cause in oil suction state (negative pressure state) and exist, thereby prevent because existing degree of vacuum to make screed 15 produce sinking or floating to a certain degree, reduce screed 15 in paver parking starting-up process causes impression and arch camber quality influence to road surface, effectively improve the flatness of paver paving concrete pavement.
Have for the kind of back pressure valve 9 that makes return line form system back pressure multiple, as relief valve, reduction valve, Pilot operated check valve.
Particularly, paver control of floating ironer system of the present invention selects relief valve to control the pressure of return line as back pressure valve 9.Generally, the pressure that return line and the hydraulic element that are attached thereto can bear is less than the pressure (work system pressure) in main oil pipe road conventionally, if the pilot pressure of the relief valve of optional native system is 1Mp, the oil pressure relief that is relief valve is 1Mp, the pressure on main oil pipe road is 20Mp, and system pressure is 20Mp.
For making the more deep understanding of those skilled in the art paver control of floating ironer of the present invention system, below in conjunction with accompanying drawing, the system mode to paver control of floating ironer system of the present invention controlling the lifting, decline of screed 15, while floating is described in detail.
Should be appreciated that, Y type three position four-way directional control valve 5, the first selector valve 7, the second selector valve 8 that this paver control of floating ironer system is related, two position and four-way reversing valves 3 can be all hydraulic control valves, also can be solenoid electric valve, might as well, Y type three position four-way directional control valve 5 is preferably Y type 3-position 4-way solenoid directional control valve, and the first selector valve 7 and the second selector valve 8 are preferably 2/2-way solenoid directional control valve, and two position and four-way reversing valves 3 are preferably two four-way electromagnetic reversing valves.
1, system mode when screed 15 promotes.
As shown in Figure 1, the Y2 end of the first solenoid valve 2, the second solenoid valve 10, Y type three position four-way directional control valve 5, two position and four-way reversing valves 3, the first selector valve 7 all electric, the second selector valve 8 dead electricity.
Hydraulic oil is entered the oil inlet P 1 of Y type three position four-way directional control valve 5 by main oil pipe road by oil sources P, flow out from its actuator port B1, by the one-way valve of flow control valve 4 second oil circuit 13 of flowing through, then form two branch roads, respectively by the first solenoid valve 2, the second solenoid valve 10 enters left big arm cylinder 1, the rod chamber of right big arm cylinder 11, promoting under pressure piston rod moves upward, piston rod drives screed 15 to promote, hydraulic oil is from left big arm cylinder 1, the rodless cavity of right big arm cylinder 11 flows out and converges and first oil circuit 12 of flowing through enters the actuator port A1 of Y type three position four-way directional control valve, flow out from oil return inlet T 1, and flow back to fuel tank.
2, system mode when screed 15 declines
As shown in Figure 2, the Y1 end of the first solenoid valve 2, the second solenoid valve 10, Y type three position four-way directional control valve 5, two position and four-way reversing valves 3, the first selector valve 7 all electric, the second selector valve 8 dead electricity.
Hydraulic oil is entered the oil inlet P 1 of Y type three position four-way directional control valve 5 by main oil pipe road by oil sources P, flow out from its actuator port A1, first oil circuit 12 of flowing through, then form two branch roads, enter respectively left big arm cylinder 1, the rodless cavity of right big arm cylinder 11, promoting under pressure piston rod moves downward, piston rod drives screed 15 to decline, hydraulic oil is from left big arm cylinder 1, the rod chamber of right big arm cylinder 11 flows out and converges and second oil circuit 13 of flowing through enters the hydraulic fluid port B2 of flow control valve 4, hydraulic oil flow in flow control valve 4 is restricted, flow out from hydraulic fluid port A2 with less flow velocity, to stop because screed 15 is subject to Action of Gravity Field to sink fast, increase stationarity when screed 15 declines.The hydraulic oil flowing out from flow control valve 4 enters the actuator port B1 of Y type three position four-way directional control valve, flows out, and flow back to fuel tank from oil return inlet T 1.
3, system mode when screed 15 floats (paver pave state)
As shown in Figure 3, the second selector valve 8, the first solenoid valve 2, the second solenoid valve 10 all electric, two position and four-way reversing valves 3, Y type three position four-way directional control valve 5, the equal dead electricity of the first selector valve 7.
Hydraulic oil by oil sources P by main oil pipe road, first selector valve 7 of flowing through on state, the hydraulic oil flowing out from the first selector valve 7 is flowed through back pressure valve 9 again and is flowed back to fuel tank.Now, the hydraulic fluid port A3 of two position and four-way reversing valves 3, hydraulic fluid port B3 is all communicated with return line, and hydraulic fluid port C3 is communicated with the rodless cavity of left big arm cylinder 1, right big arm cylinder 11, and hydraulic fluid port D3 is communicated with the rod chamber of left big arm cylinder 1, right big arm cylinder 11.Due to the hydraulic oil back pressure valve 9 of having flowed through, make return line produce certain back pressure, the return line with certain back pressure is communicated with rod chamber and the rodless cavity of left big arm cylinder 1, right big arm cylinder 11 indirectly by two position and four-way reversing valves 3, make rod chamber and rodless cavity have certain positive pressure, left big arm cylinder 1, right big arm cylinder 11 drive paver screed 15 to float to carry out paving operation in the oil hydraulic circuit forming with two position and four-way reversing valves 3 simultaneously.
If now paver parking batch turning, because the rod chamber and the rodless cavity that are communicated with by two position and four-way reversing valves 3 with return line have certain positive pressure accordingly, the certain vacuum degree of having eliminated rod chamber or rodless cavity internal cause in oil suction state (negative pressure state) and exist, thereby prevent because existing degree of vacuum to make screed 15 produce sinking or floating to a certain degree, reduce screed 15 in paver parking starting-up process causes impression and arch camber quality influence to road surface, effectively improved the flatness of paver paving concrete pavement.
As shown in Figure 4, the present invention also provides one to comprise screed 15, and this paver has paver control of floating ironer system as above.
Claims (7)
1. a paver control of floating ironer system, for controlling the lifting of screed or floating, comprise: be connected to the left big arm cylinder of screed both sides, right big arm cylinder, and two solenoid valves that are connected with the rod chamber of described left big arm cylinder, described right big arm cylinder respectively, each described solenoid valve has two working positions of two-way admittance and unidirectional oil-feed, it is characterized in that, also comprise:
Flow control valve, described flow control valve is from its hydraulic fluid port A2 to its hydraulic fluid port B2 conducting, from its hydraulic fluid port B2 to its hydraulic fluid port A2 flow rates controlled;
Y type three position four-way directional control valve, the oil inlet P 1 of described Y type three position four-way directional control valve is communicated with main oil pipe road, its oil return inlet T 1 is communicated with return line, its actuator port A1 is communicated with the first oil circuit, described the first oil circuit forms two branch roads and is communicated with the rodless cavity of described left big arm cylinder and right big arm cylinder respectively, and its actuator port B1 is communicated with the hydraulic fluid port A2 of described flow control valve; The hydraulic fluid port B2 of described flow control valve is communicated with the second oil circuit, and described the second oil circuit forms two branch roads and is communicated with the rod chamber of described left big arm cylinder and right big arm cylinder by described solenoid valve respectively;
Main relief valve, is connected between described main oil pipe road and described return line;
The first selector valve, in parallel with described main relief valve, to control the break-make of described main oil pipe road and described return line;
The second selector valve, is connected between described return line and fuel tank, to control the break-make of described return line and fuel tank;
Back pressure valve, in parallel with described the second selector valve, control the pressure of described return line so that system forms back pressure in return line;
Two position and four-way reversing valves, the hydraulic fluid port A3 of described two position and four-way reversing valves and hydraulic fluid port B3 are all communicated with described return line, and its hydraulic fluid port C3 is communicated with described the first oil circuit, and its hydraulic fluid port D3 is communicated with described the second oil circuit; Described two position and four-way reversing valves are in primary importance, hydraulic fluid port A3 and hydraulic fluid port C3 conducting described in it described in it, hydraulic fluid port B3 and hydraulic fluid port D3 conducting described in it described in it; Described two position and four-way reversing valves are in the second place, and described in it, hydraulic fluid port A3, hydraulic fluid port B3, hydraulic fluid port C3 and hydraulic fluid port D3 all close.
2. paver control of floating ironer system according to claim 1, is characterized in that, described back pressure valve is relief valve.
3. paver control of floating ironer system according to claim 1, is characterized in that, described flow control valve is series flow control valve.
4. paver control of floating ironer system according to claim 1, is characterized in that, described two position and four-way reversing valves are two four-way electromagnetic reversing valves.
5. paver control of floating ironer system according to claim 1, is characterized in that, described the first selector valve and the second selector valve are 2/2-way solenoid directional control valve.
6. paver control of floating ironer system according to claim 1, is characterized in that, described Y type three position four-way directional control valve is Y type 3-position 4-way solenoid directional control valve.
7. a paver, comprises screed, it is characterized in that, described paver is just like the paver control of floating ironer system described in any one in claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410315371.9A CN104047914B (en) | 2014-07-03 | 2014-07-03 | A kind of paver control of floating ironer system and paver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410315371.9A CN104047914B (en) | 2014-07-03 | 2014-07-03 | A kind of paver control of floating ironer system and paver |
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| Publication Number | Publication Date |
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| CN104047914A true CN104047914A (en) | 2014-09-17 |
| CN104047914B CN104047914B (en) | 2016-03-09 |
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| CN201410315371.9A Expired - Fee Related CN104047914B (en) | 2014-07-03 | 2014-07-03 | A kind of paver control of floating ironer system and paver |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104500485A (en) * | 2014-12-25 | 2015-04-08 | 柳工无锡路面机械有限公司 | Hydraulic system for floating of scraper of pavement milling machine |
| CN105626611A (en) * | 2014-11-08 | 2016-06-01 | 陕西中大机械集团有限责任公司 | Hydraulic control loop for wholly hoisting iron of paver |
| CN106523446A (en) * | 2015-09-11 | 2017-03-22 | 徐工集团工程机械股份有限公司 | Hydraulic control system and paver |
| CN106593981A (en) * | 2016-12-15 | 2017-04-26 | 北汽福田汽车股份有限公司 | Sweeping plate lifting hydraulic system, sweeping machine hydraulic system and sweeping machine |
| CN108316096A (en) * | 2018-01-22 | 2018-07-24 | 柳工无锡路面机械有限公司 | A kind of sub-base grader integrated control hydraulic system and its control method |
| CN108442213A (en) * | 2018-05-04 | 2018-08-24 | 徐工集团工程机械股份有限公司 | The multifunction control system of paver screed |
| CN108716490A (en) * | 2018-08-23 | 2018-10-30 | 安徽合力股份有限公司 | Stacker sling hydraulic pressure system |
| CN109340205A (en) * | 2018-12-21 | 2019-02-15 | 北京三智造科技有限公司 | It can floating cylinder and engineering machinery |
| CN110656558A (en) * | 2019-09-10 | 2020-01-07 | 江苏四明工程机械有限公司 | Four-crawler intelligent slip form paver and upright post floating electro-hydraulic control system thereof |
| CN113719482A (en) * | 2021-08-30 | 2021-11-30 | 湖南三一中益机械有限公司 | Hydraulic system and paver |
| CN114060337A (en) * | 2021-11-25 | 2022-02-18 | 广东精铟海洋工程股份有限公司 | Hydraulic control system of double-ring-beam hydraulic bolt lifting device |
| CN110656558B (en) * | 2019-09-10 | 2024-04-26 | 江苏四明工程机械有限公司 | Four-crawler intelligent slipform paver and upright post floating electrohydraulic control system thereof |
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| EP2295641A2 (en) * | 2009-08-26 | 2011-03-16 | Dynapac GmbH | Construction machine, in particular paver or feeder |
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