CN104500485B - A kind of road-surface milling machine scraper floating hydraulic system - Google Patents
A kind of road-surface milling machine scraper floating hydraulic system Download PDFInfo
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- CN104500485B CN104500485B CN201410818484.0A CN201410818484A CN104500485B CN 104500485 B CN104500485 B CN 104500485B CN 201410818484 A CN201410818484 A CN 201410818484A CN 104500485 B CN104500485 B CN 104500485B
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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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/08—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades
- E01C23/085—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades using power-driven tools, e.g. vibratory tools
- E01C23/088—Rotary tools, e.g. milling drums
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Operation Control Of Excavators (AREA)
- Road Paving Machines (AREA)
Abstract
A kind of road-surface milling machine scraper floating hydraulic system of the present invention, include the scraper plate oil cylinder that piston rod is set vertically downwards, the piston rod of scraper plate oil cylinder is connected with horizontally disposed scraper plate, and the epicoele of scraper plate oil cylinder leads to two-way oil circuit, and three-position four-way electromagnetic directional valve is communicated to all the way（5）Hydraulic fluid port one（A）, another road is through choke valve（4）Fuel tank is communicated to, the cavity of resorption of scraper plate oil cylinder is through 2/2-way magnetic valve（6）After be divided into two-way, three-position four-way electromagnetic directional valve is communicated to all the way（5）Hydraulic fluid port two（B）, another road is communicated to three-way pressure reducing valve（3）Oil-out；Three-position four-way electromagnetic directional valve（5）Oil inlet（P）Through auxiliary pump（1）It is communicated to fuel tank, three-position four-way electromagnetic directional valve（5）Oil-out（T）It is communicated to fuel tank；Three-way pressure reducing valve（3）Oil inlet through slippage pump（2）It is communicated to fuel tank.A kind of road-surface milling machine scraper floating hydraulic system of the present invention, simple structure and safe and reliable.
Description
Technical field
The present invention relates to a kind of hydraulic system, the control such as float is carried out more particularly, to the scraper plate on a kind of road pavement milling machine
The hydraulic system of system, belongs to milling machine technical field.
Background technology
Pavement milling machine compresses road surface in construction operation, by scraper plate ensures that the material that milling goes out is stayed in milling storehouse,
Then it is transported on truck by conveying frame and is transported.When scraper plate is excessive to the thrust on ground, though rewinding is clean, to milling machine
Advance bring additional friction, largely consume engine power, wheel is skidded during advance, or even cause scraper plate
Deformation；When the thrust of scraper plate road pavement is too small, although milling machine advance resistance diminishes, but the thrust of road pavement is too small, leads
Cause rewinding unclean, increase cleaning works amount.The weight that existing pavement milling machine relies primarily on scraper plate realizes road pavement
Compress, there is the uncontrollable defect of thrust of scraper plate road pavement；
" pavement milling machine self feed back is floated to have company to have developed one kind as disclosed in Chinese patent 201310114673.5 for this
Dynamic scraper system ", it is controlled using the automatically controlled mode such as CPU, pressure sensor to scraper plate, but is sent out in actual use
Existing, because work progress is a kind of dynamic forward process, and the pressure sensor of routine has preferably pressure in static state
Power detectivity, but in moving process, when especially it needs the pressure of measurement to be mutually perpendicular to moving direction, measurement is missed
Difference is larger；And in construction site, because the impurity such as dust are more, in automatically controlled mode using many electronic components it is easy because
The erosion of dust and damage or short circuit so that its reliability is poor.
The content of the invention
It is an object of the invention to overcome above-mentioned deficiency, there is provided a kind of simple structure and safe and reliable pavement milling machine is scraped
Plate floating hydraulic system.
The object of the present invention is achieved like this：
A kind of road-surface milling machine scraper floating hydraulic system, the system includes the scraper plate that piston rod is set vertically downwards
Oil cylinder, and the piston rod of scraper plate oil cylinder is connected with horizontally disposed scraper plate, the epicoele of scraper plate oil cylinder leads to two-way oil circuit, one
Road is communicated to the hydraulic fluid port one of three-position four-way electromagnetic directional valve, and another road is communicated to fuel tank, the cavity of resorption warp of scraper plate oil cylinder through choke valve
It is divided into two-way after 2/2-way magnetic valve, the hydraulic fluid port two of three-position four-way electromagnetic directional valve is communicated to all the way, another road is communicated to three
The oil-out of logical pressure-reducing valve；The oil inlet of above-mentioned three-position four-way electromagnetic directional valve is communicated to fuel tank, 3-position 4-way electricity through auxiliary pump
The oil-out of magnetic reversal valve is communicated to fuel tank；The oil inlet of above-mentioned three-way pressure reducing valve is communicated to fuel tank through slippage pump.
A kind of road-surface milling machine scraper floating hydraulic system of the present invention, the oil-out of the auxiliary pump is connected to a pressure control
Valve processed, the pressure-control valve includes solenoid directional control valve and overflow valve, and the oil inlet of the solenoid directional control valve is communicated to auxiliary pump
Oil-out, the oil-out of the solenoid directional control valve is communicated to fuel tank, is plugged with two other hydraulic fluid port of the solenoid directional control valve
Plug is blocked, and the oil-out of auxiliary pump is communicated to fuel tank through overflow valve.
A kind of road-surface milling machine scraper floating hydraulic system of the present invention, the oil-out of the auxiliary pump is also communicated to milling machine
On oil cylinder；Slippage pump is also communicated to the closed type hydraulic system on milling machine.
A kind of road-surface milling machine scraper floating hydraulic system of the present invention, the control coil of above-mentioned solenoid directional control valve is control line
Circle one, the control coil of magnetic valve of the three-position four-way electromagnetic directional valve at hydraulic fluid port one is control coil two, 3-position 4-way electromagnetism
The control coil of magnetic valve of the reversal valve at hydraulic fluid port two is control coil three, and the control coil of 2/2-way magnetic valve is control
Coil four；
When control coil one, control coil two and control coil four it is electric, control coil three must not electricity when, 3-position 4-way
The hydraulic fluid port one of solenoid directional control valve is connected with oil-out, and hydraulic fluid port two is connected with oil inlet, now, the hydraulic oil that auxiliary pump is pumped into
Into the cavity of resorption of scraper plate oil cylinder, the hydraulic pressure in scraper plate cylinder upper cavity oil after three-position four-way electromagnetic directional valve and 2/2-way magnetic valve
Oil flows back to fuel tank through three-position four-way electromagnetic directional valve, so that scraper plate is in lifting state.
A kind of road-surface milling machine scraper floating hydraulic system of the present invention, the control coil of above-mentioned solenoid directional control valve is control line
Circle one, the control coil of magnetic valve of the three-position four-way electromagnetic directional valve at hydraulic fluid port one is control coil two, 3-position 4-way electromagnetism
The control coil of magnetic valve of the reversal valve at hydraulic fluid port two is control coil three, and the control coil of 2/2-way magnetic valve is control
Coil four；
When control coil one, control coil three and control coil four it is electric, control coil two must not electricity when, 3-position 4-way
The hydraulic fluid port one of solenoid directional control valve is connected with oil inlet, and hydraulic fluid port two is connected with oil-out, now, the hydraulic oil that auxiliary pump is pumped into
Enter the epicoele of scraper plate oil cylinder through three-position four-way electromagnetic directional valve, the hydraulic oil in scraper plate oil cylinder cavity of resorption is through 2/2-way magnetic valve
Fuel tank is flowed back to three-position four-way electromagnetic directional valve, so that scraper plate is in decline state.
A kind of road-surface milling machine scraper floating hydraulic system of the present invention, the control coil of above-mentioned solenoid directional control valve is control line
Circle one, the control coil of magnetic valve of the three-position four-way electromagnetic directional valve at hydraulic fluid port one is control coil two, 3-position 4-way electromagnetism
The control coil of magnetic valve of the reversal valve at hydraulic fluid port two is control coil three, and the control coil of 2/2-way magnetic valve is control
Coil four；
When control coil one, control coil two, control coil three and control coil four must not be electric, what auxiliary pump was pumped into
Hydraulic oil flows back to fuel tank through solenoid directional control valve, and the two-way path of three-position four-way electromagnetic directional valve is in not on-state, two
Two three-way electromagnetic valves are in cut-off state, so that the hydraulic oil in scraper plate oil cylinder cavity of resorption is in the lock state, realize scraper plate
Lockup state.
A kind of road-surface milling machine scraper floating hydraulic system of the present invention, the control coil of above-mentioned solenoid directional control valve is control line
Circle one, the control coil of magnetic valve of the three-position four-way electromagnetic directional valve at hydraulic fluid port one is control coil two, 3-position 4-way electromagnetism
The control coil of magnetic valve of the reversal valve at hydraulic fluid port two is control coil three, and the control coil of 2/2-way magnetic valve is control
Coil four；
When control coil one, control coil two and control coil three must not be electric, when control coil four obtains electric, auxiliary pump pump
The hydraulic oil for entering flows back to fuel tank through solenoid directional control valve, and the two-way path of three-position four-way electromagnetic directional valve is in not on-state,
2/2-way magnetic valve is in the conduction state, and the hydraulic oil that slippage pump is pumped out is laggard through three-way pressure reducing valve and 2/2-way magnetic valve
Enter the cavity of resorption of scraper plate oil cylinder；The epicoele of scraper plate oil cylinder is communicated to fuel tank through choke valve；So that scraper plate is in quick condition.
Compared with prior art, the beneficial effects of the invention are as follows：
The present invention is scraper plate oil cylinder using three-way pressure reducing valve, 2/2-way magnetic valve in the work progress of milling machine
Cavity of resorption provides the hydraulic oil of certain pressure, so that scraper plate is in quick condition；Mitigate thrust of the scraper plate to ground so that
Scraper plate has a suitable thrust in work progress, both ensure that material is retained in groove milling, turn avoid because of gravity
The forward resistance for bringing；And this patent is by the control to three-position four-way electromagnetic directional valve, can easily realize to scraper plate
Lifting, decline and locking, facilitate operator and are operated.
Brief description of the drawings
Fig. 1 is a kind of structural representation of road-surface milling machine scraper floating hydraulic system of the invention.
Wherein：
Auxiliary pump 1, slippage pump 2, three-way pressure reducing valve 3, choke valve 4, three-position four-way electromagnetic directional valve 5,2/2-way electromagnetism
Valve 6, the 7-1 of scraper plate oil cylinder one, the 7-2 of scraper plate oil cylinder two, solenoid directional control valve 8-1, overflow valve 8-2.
Specific embodiment
Referring to Fig. 1, a kind of road-surface milling machine scraper floating hydraulic system of the present invention, the system includes piston
The scraper plate oil cylinder that bar is set vertically downwards, and the piston rod of scraper plate oil cylinder is connected with horizontally disposed scraper plate（Concretely, scrape
Leaf fat cylinder such as figure is provided with two, the 7-1 of the scraper plate oil cylinder one and 7-2 of scraper plate oil cylinder two）, the epicoele of scraper plate oil cylinder leads to two road binders
Road, is communicated to the A of hydraulic fluid port one of three-position four-way electromagnetic directional valve 5 all the way, and another road is communicated to fuel tank, scraper plate oil cylinder through choke valve 4
Cavity of resorption be divided into two-way after 2/2-way magnetic valve 6, hydraulic fluid port two B of three-position four-way electromagnetic directional valve 5 is communicated to all the way, it is another
Road is communicated to the oil-out of three-way pressure reducing valve 3（Hydraulic fluid port 3 shown in figure）；The oil inlet P of above-mentioned three-position four-way electromagnetic directional valve 5
Fuel tank is communicated to through auxiliary pump 1, the oil-out T of three-position four-way electromagnetic directional valve 5 is communicated to fuel tank；Above-mentioned three-way pressure reducing valve 3
Oil inlet（Hydraulic fluid port 2 shown in figure）Fuel tank, the overfall of three-way pressure reducing valve 3 are communicated to through slippage pump 2（Hydraulic fluid port shown in figure
1）It is communicated to fuel tank；
Meanwhile, the oil-out of the auxiliary pump 1 is connected to a pressure-control valve, and the pressure-control valve includes electromagnetic switch
The oil inlet of valve 8-1 and overflow valve 8-2, the solenoid directional control valve 8-1 is communicated to the oil-out of auxiliary pump 1, the electromagnetic switch
The oil-out of valve 8-1 is communicated to fuel tank, and being plugged with plug on two other hydraulic fluid port of the solenoid directional control valve 8-1 is blocked, auxiliary
The oil-out of pump 1 is helped to be communicated to fuel tank through overflow valve 8-2；When solenoid directional control valve 8-1 must not be electric, the oil-out stream of auxiliary pump 1
The pressure oil for going out flows back to fuel tank after solenoid directional control valve 8-1, and when solenoid directional control valve 8-1 obtains electric, it is right to be realized by overflow valve 8-2
Auxiliary pump 1 goes out the control of oil pressure；
The oil-out of above-mentioned auxiliary pump 1 is also communicated to remaining oil cylinder of milling machine；Slippage pump 2 also simultaneously on milling machine its
Remaining closed type hydraulic system provides repairing, that is to say, that auxiliary pump 1 and slippage pump 2 in this patent system can share milling machine
Auxiliary pump and slippage pump in the hydraulic system of script, so as to for this patent, reduce the holistic cost of system, also allow for
Upgrading is carried out to old equipment；
Operation principle of the invention is：
The control coil of above-mentioned solenoid directional control valve 8-1 is first defined for the Y1 of control coil one, three-position four-way electromagnetic directional valve 5 exists
The control coil of the magnetic valve at the A of hydraulic fluid port one is the electricity of the Y2 of control coil two, three-position four-way electromagnetic directional valve 5 at the B of hydraulic fluid port two
The control coil of magnet valve is the Y3 of control coil three, and the control coil of 2/2-way magnetic valve 6 is the Y4 of control coil four；
State one：When the Y1 of control coil one, the Y2 of control coil two and the Y4 of control coil four it is electric, the Y3 of control coil three is not
When obtaining electric, the A of hydraulic fluid port one of three-position four-way electromagnetic directional valve 5 is connected with oil-out T-phase, and the B of hydraulic fluid port two is connected with oil inlet P, this
When, the hydraulic oil that auxiliary pump 1 is pumped into keeps certain pressure through 3-position 4-way electromagnetic switch under the Stress control of overflow valve 8-2
Into the cavity of resorption of scraper plate oil cylinder after valve 5 and 2/2-way magnetic valve 6, the hydraulic oil in scraper plate cylinder upper cavity oil is through 3-position 4-way electromagnetism
Reversal valve 5 flows back to fuel tank, so that scraper plate is in lifting state；
State two：When the Y1 of control coil one, the Y3 of control coil three and the Y4 of control coil four it is electric, the Y2 of control coil two is not
When obtaining electric, the A of hydraulic fluid port one of three-position four-way electromagnetic directional valve 5 is connected with oil inlet P, and the B of hydraulic fluid port two is connected with oil-out T-phase, this
When, the hydraulic oil that auxiliary pump 1 is pumped into keeps certain pressure through 3-position 4-way electromagnetic switch under the Stress control of overflow valve 8-2
Valve 5 enters the epicoele of scraper plate oil cylinder, and the hydraulic oil in scraper plate oil cylinder cavity of resorption is changed through 2/2-way magnetic valve 6 and 3-position 4-way electromagnetism
Fuel tank is flowed back to valve 5, so that scraper plate is in decline state；
State three：When the Y1 of control coil one, the Y2 of control coil two, the Y3 of control coil three and the Y4 of control coil four must not electricity
When, the hydraulic oil that auxiliary pump 1 is pumped into flows back to fuel tank through solenoid directional control valve 8-1（Now overflow valve 8-2 is in bypass state, auxiliary
The outlet pressure of pump 1 is very low, realizes energy-conservation）, the two-way path of three-position four-way electromagnetic directional valve 5 is in not on-state, two
Two three-way electromagnetic valves 6 are in cut-off state, so that the hydraulic oil in scraper plate oil cylinder cavity of resorption is in the lock state, realize scraper plate
Lockup state；
State four：When the Y1 of control coil one, the Y2 of control coil two and the Y3 of control coil three must not electricity, the Y4 of control coil four
When obtaining electric, the hydraulic oil that auxiliary pump 1 is pumped into flows back to fuel tank through solenoid directional control valve 8-1, and the two-way of three-position four-way electromagnetic directional valve 5 leads to
Road is in not on-state, and 2/2-way magnetic valve 6 is in the conduction state, and the hydraulic oil that slippage pump 2 is pumped out depressurizes through threeway
Into the cavity of resorption of scraper plate oil cylinder after valve 3 and 2/2-way magnetic valve 6；The epicoele of scraper plate oil cylinder is communicated to fuel tank through choke valve 4；From
And cause that scraper plate is in quick condition；
In state four, three-way pressure reducing valve 3 has following three kinds of working conditions：
State A：Static state decompression, now flow is zero, oil-out（Hydraulic fluid port 3 shown in figure）Pressure maintain setting pressure
Under power, and oil inlet is not received（Hydraulic fluid port 2 shown in figure）The influence of pressure oscillation；
State B：Dynamic pressure reduction, now hydraulic oil is from oil inlet（Hydraulic fluid port 2 shown in figure）To oil-out（Shown in figure
Hydraulic fluid port 3）Flowing, now from realized functionally for, the two-way pressure-reducing valve traditional equivalent to；
State C：Overflow pattern, now oil-out（Hydraulic fluid port 3 shown in figure）Hydraulic oil pressure more than threeway depressurize
The preset value of valve 3, now hydraulic oil is from oil-out（Hydraulic fluid port 3 shown in figure）To overfall（Hydraulic fluid port 1 shown in figure）Flowing
Carry out overflow；
In addition：It should be noted that above-mentioned specific embodiment is only a prioritization scheme of this patent, the skill of this area
Any change or improvement that art personnel are done according to above-mentioned design, within the protection domain of this patent.
Claims (2)
1. a kind of road-surface milling machine scraper floating hydraulic system, it is characterised in that：The system includes piston rod vertically downwards
The scraper plate oil cylinder of setting, and the piston rod of scraper plate oil cylinder is connected with horizontally disposed scraper plate, the epicoele of scraper plate oil cylinder leads to
Two-way oil circuit, is communicated to three-position four-way electromagnetic directional valve all the way（5）Hydraulic fluid port one（A）, another road is through choke valve（4）It is communicated to oil
Case, the cavity of resorption of scraper plate oil cylinder is through 2/2-way magnetic valve（6）After be divided into two-way, three-position four-way electromagnetic directional valve is communicated to all the way
（5）Hydraulic fluid port two（B）, another road is communicated to three-way pressure reducing valve（3）Oil-out；Above-mentioned three-position four-way electromagnetic directional valve（5）'s
Oil inlet（P）Through auxiliary pump（1）It is communicated to fuel tank, three-position four-way electromagnetic directional valve（5）Oil-out（T）It is communicated to fuel tank；On
State three-way pressure reducing valve（3）Oil inlet through slippage pump（2）It is communicated to fuel tank；
The auxiliary pump（1）Oil-out be connected to a pressure-control valve, the pressure-control valve includes solenoid directional control valve（8-1）
And overflow valve（8-2）, the solenoid directional control valve（8-1）Oil inlet be communicated to auxiliary pump（1）Oil-out, the electromagnetic switch
Valve（8-1）Oil-out be communicated to fuel tank, the solenoid directional control valve（8-1）Two other hydraulic fluid port on be plugged with plug and sealed
It is stifled, auxiliary pump（1）Oil-out through overflow valve（8-2）It is communicated to fuel tank；Above-mentioned solenoid directional control valve（8-1）Control coil for control
Coil processed one（Y1）, three-position four-way electromagnetic directional valve（5）In hydraulic fluid port one（A）The control coil of the magnetic valve at place is control coil two
（Y2）, three-position four-way electromagnetic directional valve（5）In hydraulic fluid port two（B）The control coil of the magnetic valve at place is control coil three（Y3）, two
Two three-way electromagnetic valves of position（6）Control coil be control coil four（Y4）；
When control coil one（Y1）, control coil two（Y2）With control coil four（Y4）Electric, control coil three（Y3）Must not
When electric, three-position four-way electromagnetic directional valve（5）Hydraulic fluid port one（A）And oil-out（T）It is connected, hydraulic fluid port two（B）And oil inlet（P）Phase
Connection, now, auxiliary pump（1）The hydraulic oil for pumping into is through three-position four-way electromagnetic directional valve（5）With 2/2-way magnetic valve（6）It is laggard
Enter the cavity of resorption of scraper plate oil cylinder, the hydraulic oil in scraper plate cylinder upper cavity oil is through three-position four-way electromagnetic directional valve（5）Fuel tank is flowed back to, so that
Obtain scraper plate and be in lifting state；Above-mentioned solenoid directional control valve（8-1）Control coil be control coil one（Y1）, 3-position 4-way electromagnetism
Reversal valve（5）In hydraulic fluid port one（A）The control coil of the magnetic valve at place is control coil two（Y2）, three-position four-way electromagnetic directional valve
（5）In hydraulic fluid port two（B）The control coil of the magnetic valve at place is control coil three（Y3）, 2/2-way magnetic valve（6）Control line
It is control coil four to enclose（Y4）；
When control coil one（Y1）, control coil three（Y3）With control coil four（Y4）Electric, control coil two（Y2）Must not
When electric, three-position four-way electromagnetic directional valve（5）Hydraulic fluid port one（A）And oil inlet（P）It is connected, hydraulic fluid port two（B）And oil-out（T）Phase
Connection, now, auxiliary pump（1）The hydraulic oil for pumping into is through three-position four-way electromagnetic directional valve（5）Afterwards into the epicoele of scraper plate oil cylinder, scrape
Hydraulic oil in leaf fat cylinder cavity of resorption is through 2/2-way magnetic valve（6）And three-position four-way electromagnetic directional valve（5）After flow back to fuel tank so that
So that scraper plate is in decline state；
Above-mentioned solenoid directional control valve（8-1）Control coil be control coil one（Y1）, three-position four-way electromagnetic directional valve（5）In hydraulic fluid port
One（A）The control coil of the magnetic valve at place is control coil two（Y2）, three-position four-way electromagnetic directional valve（5）In hydraulic fluid port two（B）Place
Magnetic valve control coil be control coil three（Y3）, 2/2-way magnetic valve（6）Control coil be control coil four
（Y4）；
When control coil one（Y1）, control coil two（Y2）, control coil three（Y3）With control coil four（Y4）When must not be electric,
Auxiliary pump（1）The hydraulic oil for pumping into is through solenoid directional control valve（8-1）Flow back to fuel tank, three-position four-way electromagnetic directional valve（5）Two-way lead to
Road is in not on-state, 2/2-way magnetic valve（6）In cut-off state, so that the hydraulic pressure in scraper plate oil cylinder cavity of resorption
Oil is in the lock state, and realizes the lockup state of scraper plate；
Above-mentioned solenoid directional control valve（8-1）Control coil be control coil one（Y1）, three-position four-way electromagnetic directional valve（5）In hydraulic fluid port
One（A）The control coil of the magnetic valve at place is control coil two（Y2）, three-position four-way electromagnetic directional valve（5）In hydraulic fluid port two（B）Place
Magnetic valve control coil be control coil three（Y3）, 2/2-way magnetic valve（6）Control coil be control coil four
（Y4）；
When control coil one（Y1）, control coil two（Y2）With control coil three（Y3）Must not electricity, control coil four（Y4）
When electric, auxiliary pump（1）The hydraulic oil for pumping into is through solenoid directional control valve（8-1）Flow back to fuel tank, three-position four-way electromagnetic directional valve（5）Two
Road path is in not on-state, 2/2-way magnetic valve（6）It is in the conduction state, slippage pump（2）The hydraulic oil warp for pumping out
Three-way pressure reducing valve（3）With 2/2-way magnetic valve（6）Afterwards into the cavity of resorption of scraper plate oil cylinder；The epicoele of scraper plate oil cylinder is through choke valve
（4）It is communicated to fuel tank；So that scraper plate is in quick condition.
2. as claimed in claim 1 a kind of road-surface milling machine scraper floating hydraulic system, it is characterised in that：The auxiliary pump（1）
Oil-out be also communicated to oil cylinder on milling machine；Slippage pump（2）Also it is communicated to the closed type hydraulic system on milling machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410818484.0A CN104500485B (en) | 2014-12-25 | 2014-12-25 | A kind of road-surface milling machine scraper floating hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410818484.0A CN104500485B (en) | 2014-12-25 | 2014-12-25 | A kind of road-surface milling machine scraper floating hydraulic system |
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| Publication Number | Publication Date |
|---|---|
| CN104500485A CN104500485A (en) | 2015-04-08 |
| CN104500485B true CN104500485B (en) | 2017-06-06 |
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|---|---|---|---|
| CN201410818484.0A Active CN104500485B (en) | 2014-12-25 | 2014-12-25 | A kind of road-surface milling machine scraper floating hydraulic system |
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| CN108561466B (en) * | 2018-05-07 | 2024-01-26 | 宁夏天地奔牛实业集团有限公司 | Clutch and brake chain tightening device applicable to power part of coal mine underground scraper conveyor |
| CN110094376A (en) * | 2019-06-10 | 2019-08-06 | 徐州徐工筑路机械有限公司 | A kind of milling mechanism side plate floating type controlled system |
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