CN108644164A - A kind of high-altitude operation vehicle static pressure leveling system - Google Patents
A kind of high-altitude operation vehicle static pressure leveling system Download PDFInfo
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- CN108644164A CN108644164A CN201810641934.1A CN201810641934A CN108644164A CN 108644164 A CN108644164 A CN 108644164A CN 201810641934 A CN201810641934 A CN 201810641934A CN 108644164 A CN108644164 A CN 108644164A
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- 230000003068 static effect Effects 0.000 title claims abstract description 20
- 239000003921 oil Substances 0.000 claims description 315
- 239000010720 hydraulic oil Substances 0.000 claims description 19
- 239000012530 fluid Substances 0.000 claims description 16
- 239000002828 fuel tank Substances 0.000 claims description 10
- 238000005303 weighing Methods 0.000 claims description 4
- 238000005452 bending Methods 0.000 abstract description 8
- 230000000630 rising effect Effects 0.000 abstract description 4
- 230000002457 bidirectional effect Effects 0.000 abstract description 2
- 238000009825 accumulation Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 4
- 239000013641 positive control Substances 0.000 description 3
- 239000010729 system oil Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- 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
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- 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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention discloses a kind of high-altitude operation vehicle static pressure leveling systems,By the way that active leveling cyclinder is connected with driven leveling cyclinder by balanced valve,And in turntable,Bidirectional hydraulic lock or two balanced valves in parallel are set at platform two at control platform leveling multi-way valve,Pressure in leveling system is lockked while so that two oil cylinders is ensured linkage,And set overflow valve between active leveling cyclinder and working connection,When pressure reaches the pressure of the first overflow valve or the setting of the second overflow valve,High pressure oil in leveling system can be from the first overflow valve or the second overflow valve overflow oil return box,It prevents hydraulic system internal pressure from insisting on height of continuing rising and causes booster,Oil cylinder stretch bending,Oil cylinder disengages or the danger of oil cylinder hinge tearing,While to ensure system even running,Avoid the high-altitude operation vehicle booster caused by workbench is crooked and continues movement possibility in operation,Oil cylinder stretch bending,Oil cylinder disengages or the security hidden trouble of oil cylinder hinge tearing.
Description
Technical field
The present invention relates to a kind of engineering truck leveling systems, and in particular to a kind of high-altitude operation vehicle static pressure leveling system belongs to
Engineering machinery hydraulic control technology field.
Background technology
Telescopic arm mixes arm-type high-altitude operation vehicle in street lamp, gardens, decorations, oil, building, electric power, ship
The fields such as manufacture, bridge construction are widely used.The control object of high-altitude operation vehicle levelling mechanism is to be connected to the work on arm support top
Make platform, existing common leveling system is broadly divided into two kinds of electrichydraulic control leveling and static pressure leveling, but due to electrichydraulic control
Leveling system control is complicated, and maintenance cost is high, thus be used primarily in big height, complex working condition high-altitude operation vehicle on.
Insulating overhead operating vehicle is usually applied to altitude hot-line operation, in order to improve its insulation effect, mostly uses static pressure greatly
Leveling system, it is quiet to avoid being malfunctioned caused by electric fault in electro-hydraulic leveling system, and compared to electro-hydraulic leveling system
Leveling system is pressed to run more stable, reliability higher.But existing static pressure leveling system require it is equal at platform and turntable two
Leveling can be achieved, one group of hand-operated valve Parallel Control usually is respectively set in platform and turntable in order to reach equal levelling at two
Leveling system, when occur workbench it is crooked after, Hydraulic Elements will start in leveling system, be carried out to platform by hydraulic cylinder
Adjustment, due to coordinated signals between two leveling cyclinders during adjustment, when an oil cylinder is in extreme position, another oil
Cylinder also will continue to act, and increase so as to cause pressure in leveling system, and hydraulic oil, which can not release, causes booster, oil cylinder stretch bending, oil
Cylinder disengages or the tearing of oil cylinder hinge, and platform operating personnel is made to cause danger；And need to increase by two in oil circuit arrangement from platform
To the pipeline of turntable, cause oil circuit redundancy complicated.
Invention content
In order to overcome deficiencies of the prior art, the present invention to provide a kind of high-altitude operation vehicle static pressure leveling system,
Preventing hydraulic system from occurring during leveling, detonation, oil cylinder stretch bending, oil cylinder disengages or the mode of the accidents such as oil cylinder hinge tearing,
Simplify hydraulic control oil circuit, improves the safety coefficient of operating personnel.
To solve the above-mentioned problems, a kind of high-altitude operation vehicle static pressure leveling system of the present invention, including workbench, turntable,
Level-one arm and two level arm, level-one amplitude oil cylinder, two level amplitude oil cylinder, active leveling cyclinder and driven leveling cyclinder, wherein work
The left end of platform, turntable, level-one arm and two level arm, level-one arm is hingedly connected at the hinge of turntable upper end, the right end of level-one arm with
The right end of two level arm is hinged, and the left end of two level arm is hinged at the rig bracket of workbench side, the middle part of level-one arm with turn
It is hingedly connected with level-one amplitude oil cylinder between the middle and lower part of platform, is cut with scissors between the middle part and level-one arm right end position on the lower side of two level arm
Grounding connection has two level amplitude oil cylinder, is hingedly connected between the right end position to the left and level-one arm right end position to the left of two level arm
There is active leveling cyclinder, driven leveling cyclinder is hingedly connected between the left end of two level arm and the middle part of rig bracket；Also
Including two groups of valve blocks, valve block one is mounted at Work turning table, and valve block two is mounted at platform；Pass through three be located on working connection
Six-way transfer valve come select hydraulic oil enter valve block one or enter valve block two；Wherein, valve block one includes turning table control leveling hand
The two level commutation that the flexible level-one reversal valve one of dynamic reversal valve, control level-one amplitude oil cylinder and control two level amplitude oil cylinder are stretched
The oil inlet of valve one, turning table control leveling hand-operated direction valve, level-one reversal valve one and two level reversal valve one is connected in parallel on in-line,
Oil return opening is connected in parallel on oil return line；Valve block two includes platform courses leveling hand-operated direction valve, controls what level-one amplitude oil cylinder was stretched
The two level reversal valve two that level-one reversal valve two and control two level amplitude oil cylinder are stretched, platform courses leveling hand-operated direction valve, one
The oil inlet of grade reversal valve two and two level reversal valve two is connected in parallel on in-line, and oil return opening is connected in parallel on oil return line；Turning table control
Two oil inlet phases that the first oil outlet A1, the second oil outlet B1 of leveling hand-operated direction valve 11 lock pressure valve part with first respectively
Even, the first oil outlet A2, the second oil outlet B2 of platform courses leveling hand-operated direction valve 1 two with the second lock pressure valve part respectively
Oil inlet be connected, first lock pressure valve part two oil outlets, second lock pressure valve part two oil outlets, respectively with the first balanced valve
Oil inlet V5, the second balanced valve oil inlet V6 are connected in parallel on active leveling cyclinder oil port, the first balanced valve oil outlet C5 with it is driven
Leveling cyclinder rodless cavity is connected to, and the second balanced valve oil outlet C6 is connected to driven leveling cyclinder rod chamber.
The oil inlet direction that hydraulic oil is selected by three six-way transfer valves, when three six-way transfer valves are in an intermediate position
When, high pressure oil is adjusted oil pump by a pair of each oil cylinder of valve block of lower end, when three six-way transfer valves commutate to upper end
When position, high pressure oil is adjusted each oil cylinder by the valve block two of upper end oil pump；Active leveling cyclinder in leveling system
The oil that rod chamber pumps out enters the second balanced valve oil inlet V6, enters driven leveling cyclinder rod chamber by oil outlet C6, driven
Leveling cyclinder rodless cavity it is fuel-displaced enter the first balanced valve oil outlet C5, the first balanced valve forward direction control port by the second balanced valve into
Pressure oil is opened at hydraulic fluid port V6, and the pressure oil entered from the first balanced valve oil outlet C5 passes through oil inlet by the balanced valve being opened
Mouth V5 is flowed into active leveling cyclinder rodless cavity, forms hydraulic leveling system closed loop, main when driven leveling cyclinder is full reduced
Dynamic leveling cyclinder still has stretching surplus, and continuing raising two level arm causes the continuation of active leveling cyclinder overhanging, due to driven leveling oil
Cylinder is full reduced, and the hydraulic oil pumped out from active leveling cyclinder rod chamber can not continue into driven leveling in the way of before
Cylinder rod chamber, as active leveling cyclinder rod chamber pumps out the accumulation of hydraulic oil, the first lock pressure valve part and the second lock pressure valve part
System pressure can be reversely lockked, leveling system pressure gradually rises, and meeting releasing pressure automatically flows back to when pressure reaches certain pressure
Fuel tank ensure that in hydraulic system that pressure will not be increased infinitely so that damage driven leveling cyclinder and other Hydraulic Elements, attachment,
It prevents hydraulic system internal pressure from insisting on height of continuing rising and causes booster, oil cylinder stretch bending, the danger that oil cylinder disengages or oil cylinder hinge is torn；And by
It is both provided with hydraulic lock in turntable and platform, platform hand-operated direction valve need to can only be lockked by pipeline and platform hydraulic lock connection
Pressure in leveling system reduces the complexity of pipeline arrangement without being connected at turntable hand-operated direction valve.
Specifically, the first lock pressure valve part is turntable hydraulic locking, the second lock pressure valve part is locked for platform hydraulic, turning table control
The first oil outlet A1, the second oil outlet B1 of leveling hand-operated direction valve respectively with the first oil inlet V1 of turntable hydraulic locking, second
Oil inlet V2 is connected, the first oil outlet A2, the second oil outlet B2 of platform courses leveling hand-operated direction valve respectively with platform hydraulic
The first oil inlet V3, the second oil inlet V4 of lock are connected, the first oil outlet C1 of turntable hydraulic locking respectively with the first balanced valve into
Hydraulic fluid port V5, platform hydraulic lock the first oil outlet C3, the rodless cavity of active leveling cyclinder is connected, the second oil outlet of turntable hydraulic locking
C2 locks the second oil outlet C4 with the second balanced valve oil inlet V6, platform hydraulic respectively, active leveling cyclinder rod chamber is connected.
It is also parallel with the first overflow valve and the second overflow valve at the rodless cavity and rod chamber of active leveling cyclinder, wherein the
One overflow valve oil inlet P 3 is connected with active leveling cyclinder rodless cavity, and the second overflow valve oil inlet P 4 has bar with active leveling cyclinder
Chamber is connected, and the first overflow valve oil outlet T3 and the second overflow valve oil outlet T4 take back fuel tank respectively.
Another scheme, the first lock pressure valve part are the 5th balanced valve and the 6th balanced valve, and the second lock pressure valve part is the
Three balanced valves and the 4th balanced valve, the first oil outlet A1, the second oil outlet B1 of turning table control leveling hand-operated direction valve respectively with
The oil inlet V9 of 5th balanced valve, the 6th balanced valve oil inlet V10 are connected, and the first of platform courses leveling hand-operated direction valve is fuel-displaced
Mouth A2, the second oil outlet B2 are connected with the oil inlet V8 of the oil inlet V7 of third balanced valve, the 4th balanced valve respectively, the 5th balance
The oil outlet C9 of valve respectively with the first balanced valve oil inlet V5, the oil outlet C7 of third balanced valve, active leveling cyclinder without bar
Chamber is connected, the oil outlet C10 of the 6th balanced valve respectively with the second balanced valve oil inlet V6, oil outlet C8, the master of the 4th balanced valve
Dynamic leveling cyclinder rod chamber is connected.
In order to ensure that driven adjusting oil cylinder is synchronous with active leveling cyclinder, and job platform is avoided to tilt and adjust lag
The phenomenon that occur, the first balanced valve, the second balanced valve, third balanced valve, the 4th balanced valve, the 5th balanced valve and the 6th balanced valve
It is external control type balanced valve, and all has positive unlatching control port, the positive of the first balanced valve opens control port and second
The positive unlatching control port of the oil inlet V6 connections of balanced valve, the second balanced valve is connected to the oil inlet V5 of the first balanced valve,
The positive unlatching control port of third balanced valve is connected to the oil inlet V8 of the 4th balanced valve, and the positive of the 4th balanced valve opens control
Liquefaction mouth is connected to the oil inlet V7 of third balanced valve, the 5th balanced valve it is positive open control port and the 6th balanced valve into
The positive unlatching control port of hydraulic fluid port V10 connections, the 6th balanced valve is connected to the oil inlet V9 of the 5th balanced valve, above-mentioned all flat
The positive Opening pressure of weighing apparatus valve is no more than 2Mpa.
Specifically, first overflow valve and the second overflow valve setting pressure are more than maximum pressure inside leveling hydraulic system
2~3Mpa.
Further, the rod chamber and rodless cavity of the active leveling cyclinder and driven leveling cyclinder are both provided with for putting
Go out the vent valve for being blended in gas in fluid.The vent valve can bleed off the gas being blended in fluid, so as to avoid gas
Body be blended in fluid enter active leveling cyclinder with caused by driven leveling cyclinder leveling action lag and can not be synchronous
The phenomenon that linkage, occurs, while preventing system pressure excessive.
Preferably, turning table control leveling hand-operated direction valve and platform courses leveling hand-operated direction valve are to have Y types
Three six logical hand-operated direction valves of Median Function.
Since turning table control leveling hand-operated direction valve and platform courses leveling hand-operated direction valve Median Function are Y types, i.e.,
Turning table control leveling hand-operated direction valve oil return inlet T 1 and the first oil outlet A1, the second oil outlet B1, the first oil inlet of turntable hydraulic locking
Mouth V1, the second oil inlet V2 are communicated, platform courses leveling hand-operated direction valve oil return inlet T 2 and the first oil outlet A2, the second oil outlet
B2, platform hydraulic lock the first oil inlet V3, the second oil inlet V4 is communicated, and will not be leaked due to spool in the other actions of operation
Causing to manually control the pressure that the accumulation of the hydraulic oil between leveling reversal valve and hydraulic lock generates makes hydraulic lock open to lead
Workbench is caused to tilt.
Preferably, the first balanced valve oil outlet C5 is connected by board-like connection type with driven leveling cyclinder rodless cavity, the
Two balanced valve oil outlet C6 are connected by board-like connection type with driven leveling cyclinder rod chamber.
The advantage of this connection type is that, if leveling system conduit failure, gasket mounted balanced valve can lock platform
Leveling cylinder is not in the security risk caused by pipeline booster.
In order to simplify pipeline arrangement, turntable hydraulic locking, the first overflow valve and the second overflow valve are each attached on turntable；Platform
Hydraulic lock is fixed on workbench.
The present invention is by the way that active leveling cyclinder to be connected with driven leveling cyclinder by balanced valve, and in turntable, platform two
Locate setting bidirectional hydraulic lock or two balanced valves at control platform leveling multi-way valve, is protected while so that two oil cylinders is ensured linkage
Card locks pressure in leveling system, and sets overflow valve between active leveling cyclinder and working connection, when pressure reaches first
When overflow valve or the pressure of the second overflow valve setting, the high pressure oil in leveling system can overflow from the first overflow valve or the second overflow valve
Fuel tank is flowed back to, prevents hydraulic system internal pressure from insisting on height of continuing rising and causes booster, oil cylinder stretch bending, oil cylinder disengagement or the tearing of oil cylinder hinge
Danger, while to ensure system even running, avoid high-altitude operation vehicle in operation because workbench is crooked and
Booster, oil cylinder stretch bending, oil cylinder caused by continuing movement possibility disengage or the security hidden trouble of oil cylinder hinge tearing.
Description of the drawings
Fig. 1 is one hydraulic schematic diagram of leveling system embodiment of the present invention；
Fig. 2 is the enlarged drawing in the portions I in Fig. 1；
Two hydraulic schematic diagram of leveling system embodiment of Fig. 3 present invention；
In figure：1, platform courses leveling hand-operated direction valve, 2, platform hydraulic lock, 3, rig bracket, 4, workbench, 5, from
Dynamic leveling cyclinder, the 6, first balanced valve, the 7, second balanced valve, the 8, first overflow valve, the 9, second overflow valve, 10, turntable hydraulic locking,
11, turning table control leveling hand-operated direction valve, 12, turntable, 13, level-one amplitude oil cylinder, 14, level-one arm, 15, two level arm, 16, two level
Amplitude oil cylinder, 17, active leveling cyclinder；18, two level reversal valve one；19, level-one reversal valve one；20, two level reversal valve two；21、
Level-one reversal valve two；22, three six-way transfer valves；23, third balanced valve, the 24, the 4th balanced valve, the 25, the 5th balanced valve, 26,
6th balanced valve.
Specific implementation mode
The present invention is described in detail in the following with reference to the drawings and specific embodiments.For the convenience of description, by Fig. 1 and Fig. 3
On be defined as upper, give a definition for bottom.
Embodiment one
As shown in Figure 1, a kind of high-altitude operation vehicle static pressure leveling system, including workbench 4, turntable 12,14 and of level-one arm
The left end of two level arm 15, level-one arm 14 is hingedly connected at 12 upper end hinge of turntable, right end and the two level arm 15 of level-one arm 14
Right end is hinged, and the left end of two level arm 15 is hinged at the rig bracket 3 of workbench side, middle part and the turntable 12 of level-one arm 14
Middle and lower part between be hingedly connected with level-one amplitude oil cylinder 13, the middle part and 14 right end of level-one arm position on the lower side of two level arm 15 it
Between be hingedly connected with two level amplitude oil cylinder 16, between the right end position to the left and 14 right end of level-one arm position to the left of two level arm 15
It is hingedly connected with active leveling cyclinder 17, is hingedly connected between the left end and the middle part of rig bracket 3 of two level arm 15
Driven leveling cyclinder 5；Further include two groups of valve blocks, valve block one is mounted at turntable 12, and valve block two is mounted at workbench 4；It is logical
Three six-way transfer valves 22 being located on working connection are crossed to select hydraulic oil to enter valve block one or enter valve block two；Wherein, valve
Block one includes turning table control leveling hand-operated direction valve 11, controls the flexible level-one reversal valve 1 of level-one amplitude oil cylinder 13 and control
The flexible two level reversal valve 1 of two level amplitude oil cylinder 16 processed, turning table control leveling hand-operated direction valve 11, level-one reversal valve 1
It is connected in parallel on in-line with the oil inlet of two level reversal valve 1, oil return opening is connected in parallel on oil return line；Valve block two includes platform control
The flexible level-one reversal valve 2 21 of leveling hand-operated direction valve 1 processed, control level-one amplitude oil cylinder 13 and control two level amplitude oil cylinder
17 flexible two level reversal valves 2 20, platform courses leveling hand-operated direction valve 1, level-one reversal valve 2 21 and two level reversal valve 2 20
Oil inlet be connected in parallel on in-line, oil return opening is connected in parallel on oil return line；The first of turning table control leveling hand-operated direction valve 11 goes out
Hydraulic fluid port A1, the second oil outlet B1 are connected with the first oil inlet V1 of turntable hydraulic locking 10, the second oil inlet V2 respectively, platform courses
The first oil outlet A2, the second oil outlet B2 of leveling hand-operated direction valve 1 respectively with the first oil inlet V3 of platform hydraulic lock 2, the
Two oil inlet V4 are connected, the first oil outlet C1 of turntable hydraulic locking 10 respectively with 8 oil inlet P 3 of the first overflow valve, the first balanced valve
6 oil inlet V5, platform hydraulic lock 2 first oil outlet C3,17 rodless cavity of active leveling cyclinder is connected, and the second of turntable hydraulic locking 10
Oil outlet C2 locks 2 second oil outlets with 9 oil inlet P 4 of the second overflow valve, 7 oil inlet V6 of the second balanced valve, platform hydraulic respectively
C4,17 rod chamber of active leveling cyclinder are connected, and 8 oil outlet T3 of the first overflow valve and 9 oil outlet T4 of the second overflow valve take back respectively
Fuel tank, 6 oil outlet C5 of the first balanced valve are connected to 5 rodless cavity of driven leveling cyclinder, 7 oil outlet C6 of the second balanced valve and driven tune
5 rod chamber of flat oil cylinder is connected to.
The oil inlet direction that hydraulic oil is selected by three six-way transfer valves 22, when three six-way transfer valves 22 are in interposition
When setting, high pressure oil is adjusted oil pump by a pair of each oil cylinder of valve block of lower end, when three six-way transfer valves 22 commutate extremely
When upper end position, high pressure oil is adjusted each oil cylinder by the valve block two of upper end oil pump；Active leveling in leveling system
The oil that 17 rod chamber of oil cylinder pumps out enters 7 oil inlet V6 of the second balanced valve, and entering driven leveling cyclinder 5 by oil outlet C6 has bar
Chamber, 5 rodless cavity of driven leveling cyclinder is fuel-displaced to enter 6 oil outlet C5 of the first balanced valve, and the positive control port of the first balanced valve 6 is by the
Pressure oil is opened at two balanced valves, 7 oil inlet V6, and the pressure oil entered from 6 oil outlet C5 of the first balanced valve is flat by what is be opened
Weighing apparatus valve is flowed into 17 rodless cavity of active leveling cyclinder by oil inlet V5, forms hydraulic leveling system closed loop, if working as driven tune
When flat oil cylinder 5 is full reduced, active leveling cyclinder 17 still has stretching surplus, and continuing raising two level arm 15 leads to active leveling cyclinder 17
Continue overhanging, since driven leveling cyclinder 5 is full reduced, the hydraulic oil pumped out from 17 rod chamber of active leveling cyclinder can not be according to it
Preceding mode continues into 5 rod chamber of driven leveling cyclinder, as 17 rod chamber of active leveling cyclinder pumps out the tired of hydraulic oil
Product, turntable hydraulic locking 10 and platform hydraulic lock 2 can reversely lock system pressure, and leveling system pressure gradually rises, and works as pressure
When reaching the oil pressure relief of the second overflow valve 9, pressure oil will be flowed into from the oil inlet P 4 of the second overflow valve 9 in leveling system,
Fuel tank is flowed back to from oil outlet T4, ensure that pressure will not be increased infinitely so that damaging driven leveling cyclinder and other in hydraulic system
Hydraulic Elements, attachment prevent hydraulic system internal pressure from insisting on height of continuing rising and cause booster, oil cylinder stretch bending, oil cylinder disengagement or oil cylinder hinge
The danger of tearing；And since turntable and platform are both provided with hydraulic lock, platform hand-operated direction valve need to only pass through pipeline and platform liquid
Pressure lock connection can lock pressure in leveling system, without being connected at turntable hand-operated direction valve, reduce pipeline arrangement
Complexity.
In order to ensure that driven adjusting oil cylinder is synchronous with active leveling cyclinder, and job platform is avoided to tilt and adjust lag
The phenomenon that occur, the first balanced valve 6 and the second balanced valve 7 are external control type balanced valve, and all have it is positive open control port,
The positive unlatching control port of first balanced valve 6 is connected to the oil inlet V6 of the second balanced valve 7, and the forward direction of the second balanced valve 7 is opened
It opens control port to be connected to the oil inlet V5 of the first balanced valve 6, the positive Opening pressure of the first balanced valve 6 and the second balanced valve 7
No more than 2Mpa.
Specifically, first overflow valve, 8 and second overflow valve 9 setting pressure is more than maximum pressure inside leveling hydraulic system
2~3Mpa of power.
Further, the rod chamber and rodless cavity of the active leveling cyclinder 17 and driven leveling cyclinder 5 are both provided with use
It is blended in the vent valve of gas in fluid in releasing.The vent valve can bleed off the gas being blended in fluid, to avoid
Leveling action lag and can not caused by gas mixing enters active leveling cyclinder and driven leveling cyclinder in fluid
The phenomenon that synchronous interaction, occurs, while preventing system pressure excessive.
Preferably, level-one reversal valve 1, level-one reversal valve 2 21, two level reversal valve 1, two level reversal valve 2 20 are equal
For three six logical hand-operated direction valves of O-shaped Median Function.
Each reversal valve being connected with two amplitude oil cylinders is O-shaped Median Function, therefore when some reversal valve is in middle position
When each hydraulic fluid port all close, hydraulic pump can not unload, and be convenient for commutation valve events connected in parallel.
As depicted in figs. 1 and 2, turning table control leveling hand-operated direction valve 11 and platform courses leveling hand-operated direction valve 1 are Y
Three six logical hand-operated direction valves of type Median Function.
Since turning table control leveling hand-operated direction valve 11 and 1 Median Function of platform courses leveling hand-operated direction valve are Y types,
That is 11 oil return inlet T 1 of turning table control leveling hand-operated direction valve and the first oil outlet A1, the second oil outlet B1, turntable hydraulic locking first
Oil inlet V1, the second oil inlet V2 are communicated, 1 oil return inlet T 2 of platform courses leveling hand-operated direction valve and the first oil outlet A2, second
Oil outlet B2, platform hydraulic lock the first oil inlet V3, the second oil inlet V4 is communicated, will not be due to valve in the other actions of operation
Core leakage cause hydraulic oil between hand-operated direction valve and hydraulic lock accumulate the pressure generated hydraulic lock is opened so as to cause
Workbench tilts.
Preferably, 6 oil outlet C5 of the first balanced valve is connected by board-like connection type with 5 rodless cavity of driven leveling cyclinder,
Second balanced valve, 7 oil outlet C6 is connected by board-like connection type with 5 rod chamber of driven leveling cyclinder.
The advantage of this connection type is that, if leveling system conduit failure, gasket mounted balanced valve can lock platform
Leveling cylinder is not in the security risk caused by pipeline booster.
In order to simplify pipeline arrangement, turntable hydraulic locking 10, the first overflow valve 8 and the second overflow valve 9 are each attached to turntable 12
On；Platform hydraulic lock 2 is fixed on workbench 4.
Detailed elaboration now is done to its operation principle and the course of work：
As depicted in figs. 1 and 2, after high-altitude operation vehicle assembles, two level arm 15 is in the state fallen entirely, at this time two level luffing
Oil cylinder 16 is full reduced, and active leveling cyclinder 17 is full reduced, adjusts turning table control leveling hand-operated direction valve 11 or platform courses leveling is manual
Workbench 4 is adjusted to horizontality by reversal valve 1, and driven leveling cylinder 5 is in cylinder rod and stretches state entirely at this time, then operates turntable control
Leveling hand-operated direction valve 11 processed is allowed in bottom, and high pressure oil passes through 11 second oil outlet B1 of turning table control leveling hand-operated direction valve
Enter through 10 second oil inlet V2 of turntable hydraulic locking, the second oil outlet C2,7 oil inlet V6 of the second balanced valve, oil outlet C6 driven
5 rod chamber of leveling cyclinder makes oil cylinder bounce back, by turning table control leveling hand-operated direction valve when adjusting about 10 ° of workbench 4 hypsokinesis
11 reset, raising two level arm 15, and active leveling cyclinder 17 is stretched out as 15 luffing of two level arm plays cylinder rod, is actively adjusted in leveling system
17 rod chamber of flat oil cylinder pumps out oil and enters 7 oil inlet V6 of the second balanced valve, and entering driven leveling cyclinder 5 by oil outlet C6 has
Rod cavity, 5 rodless cavity of driven leveling cyclinder is fuel-displaced to enter 6 oil outlet C5 of the first balanced valve, the positive control port of the first balanced valve 6 by
Pressure oil is opened at second balanced valve, 7 oil inlet V6, what the pressure oil process entered from 6 oil outlet C5 of the first balanced valve was opened
Balanced valve is flowed into 17 rodless cavity of active leveling cyclinder by oil inlet V5, forms hydraulic leveling system closed loop；Continue raising
Two level arm 15, when driven leveling cyclinder 5 is full reduced, active leveling cyclinder 17 still has stretching surplus, continues raising two level arm 15,
Active leveling cyclinder 17 continue it is overhanging, since driven leveling cyclinder 5 is full reduced, the liquid that is pumped out from 17 rod chamber of active leveling cyclinder
Pressure oil can not continue into 5 rod chamber of driven leveling cyclinder in the way of before, with 17 rod chamber of active leveling cyclinder
Pump out the accumulation of hydraulic oil, turntable hydraulic locking 10 and platform hydraulic lock 2 can reversely lock system pressure, leveling system pressure by
Edge up height and when reaching the oil pressure relief of the second overflow valve 9, and pressure oil will be from the oil inlet of the second overflow valve 9 in leveling system
P4 is flowed into, then flows back to fuel tank from oil outlet T4, ensure that pressure will not be increased infinitely so that damaging driven leveling in hydraulic system
Oil cylinder and other Hydraulic Elements, attachment.
Equally, when active leveling cyclinder 17 is stretched entirely, when the not full reduced operating mode to lean forward of driven leveling cyclinder 5, two level arm 15
It falls, when driven leveling cyclinder 5 is stretched entirely, active leveling cyclinder 17 still has retraction surplus, continues whereabouts two level arm 15, actively
Leveling cyclinder 17 continues to bounce back, and driven leveling cyclinder 5 is stretched entirely at this time, the hydraulic oil pumped out from 17 rodless cavity of active leveling cyclinder
5 rodless cavity of driven leveling cyclinder can not be continued into the way of before, as 17 rodless cavity of active leveling cyclinder pumps out
The accumulation of hydraulic oil, turntable hydraulic locking 10 and platform hydraulic lock 2 can reversely lock system pressure, and leveling system pressure gradually rises
Height, when pressure reaches the oil pressure relief of the first overflow valve 8, pressure oil will be from the oil inlet of the first overflow valve 8 in leveling system
Mouth P3 is flowed into, and is flowed back to fuel tank from oil outlet T3, be ensure that pressure will not be increased infinitely so that damaging driven leveling in hydraulic system
Oil cylinder and other Hydraulic Elements, attachment.
Embodiment two
Embodiment two and embodiment one the difference is that, turntable hydraulic locking is changed to the 5th balanced valve 25 and the 6th balance
Platform hydraulic lock is changed to third balanced valve 23 and the 4th balanced valve 24, while removing and being connected in parallel on the two of turntable hydraulic locking by valve 26
A overflow valve.
Specifically, the first oil outlet A1 of turning table control leveling hand-operated direction valve 11, the second oil outlet B1 are respectively with the 5th
Oil inlet V9, the 26 oil inlet V10 of the 6th balanced valve of balanced valve 25 are connected, and the first of platform courses leveling hand-operated direction valve 1 goes out
Hydraulic fluid port A2, the second oil outlet B2 are connected with the oil inlet V8 of the oil inlet V7 of third balanced valve 23, the 4th balanced valve 24 respectively, the
The oil outlet C9 of five balanced valves 25 respectively with 6 oil inlet V5 of the first balanced valve, the oil outlet C7 of third balanced valve 23, active leveling
The rodless cavity of oil cylinder 17 is connected, and the oil outlet C10 of the 6th balanced valve 26 is balanced with 7 oil inlet V6 of the second balanced valve, the 4th respectively
Oil outlet C8,17 rod chamber of active leveling cyclinder of valve 24 are connected.
Detailed elaboration now is done to its operation principle and the course of work：
As shown in figure 3,
After high-altitude operation vehicle assembles, two level arm 15 is in the state fallen entirely, and two level amplitude oil cylinder 16 is full reduced at this time, actively
Leveling cyclinder 17 is full reduced, adjusts turning table control leveling hand-operated direction valve 11 or platform courses leveling hand-operated direction valve 1 work is flat
Platform 4 is adjusted to horizontality, and driven leveling cylinder 5 is in cylinder rod and stretches state entirely at this time, then operates turning table control leveling manual reverse of direction
Valve 11 is allowed in bottom, and high pressure oil is by 11 second oil outlet B1 of turning table control leveling hand-operated direction valve through the 6th balanced valve 26
Oil inlet V10, oil outlet C10,7 oil inlet V6 of the second balanced valve, oil outlet C6 make oil into 5 rod chamber of driven leveling cyclinder
Cylinder bounces back, and resets turning table control leveling hand-operated direction valve 11 when adjusting about 10 ° of workbench 4 hypsokinesis, raising two level arm 15 is main
Dynamic leveling cyclinder 17 is stretched out as 15 luffing of two level arm plays cylinder rod, and 17 rod chamber of active leveling cyclinder pumps out oil simultaneously in leveling system
Into 7 oil inlet V6 of the second balanced valve, 5 rod chamber of driven leveling cyclinder is entered by oil outlet C6, driven leveling cyclinder 5 is without bar
Chamber is fuel-displaced to enter 6 oil outlet C5 of the first balanced valve, and the positive control port of the first balanced valve 6 is by 7 oil inlet V6 of the second balanced valve
Pressure oil is opened, and the pressure oil entered from 6 oil outlet C5 of the first balanced valve is flowed by the balanced valve being opened by oil inlet V5
Enter to 17 rodless cavity of active leveling cyclinder, forms hydraulic leveling system closed loop；Continue raising two level arm 15, when driven leveling oil
When cylinder 5 is full reduced, active leveling cyclinder 17 still has stretching surplus, continues raising two level arm 15, and active leveling cyclinder 17 continues outer
It stretches, since driven leveling cyclinder 5 is full reduced, the hydraulic oil pumped out from 17 rod chamber of active leveling cyclinder can not be according to side before
Formula continues into 5 rod chamber of driven leveling cyclinder, as 17 rod chamber of active leveling cyclinder pumps out the accumulation of hydraulic oil, the 4th
Balanced valve 24 and the 6th balanced valve 26 can reversely lock system pressure, and leveling system pressure gradually rises and reaches the 4th balance
When the reversed Opening pressure of valve 24 or the 6th balanced valve 26, in leveling system pressure oil will from the C8 mouths of the 4th balanced valve 24 or
The C10 mouths of 6th balanced valve 26 flow into, then are flowed out from the V8 mouths of the 4th balanced valve 24 or the V10 mouths of the 6th balanced valve 26, then pass through
B2 mouthfuls flow back to fuel tank to T2 mouthfuls or B1 mouthfuls to T1 mouthfuls, ensure that pressure will not be increased infinitely so that damaging driven tune in hydraulic system
Flat oil cylinder and other Hydraulic Elements, attachment.
Equally, when active leveling cyclinder 17 is stretched entirely, when the not full reduced operating mode to lean forward of driven leveling cyclinder 5, two level arm 15
It falls, when driven leveling cyclinder 5 is stretched entirely, active leveling cyclinder 17 still has retraction surplus, continues whereabouts two level arm 15, actively
Leveling cyclinder 17 continues to bounce back, and driven leveling cyclinder 5 is stretched entirely at this time, the hydraulic oil pumped out from 17 rodless cavity of active leveling cyclinder
5 rodless cavity of driven leveling cyclinder can not be continued into the way of before, as 17 rodless cavity of active leveling cyclinder pumps out
The accumulation of hydraulic oil, third balanced valve 23 and the 5th balanced valve 25 can reversely lock system pressure, and leveling system pressure is gradual
When increasing and reach the reversed Opening pressure of third balanced valve 23 and the 5th balanced valve 25, pressure oil will be from leveling system
The C9 mouths of the C7 mouths of three balanced valves 23 or the 5th balanced valve 25 flow into, then from the V7 mouths of third balanced valve 23 or the 5th balanced valve 25
The outflow of V9 mouths, then flow back to fuel tank to T2 mouthfuls or A1 mouthfuls to T1 mouthfuls through A2 mouthfuls, ensure that pressure will not infinitely rise in hydraulic system
Height is so that damage driven leveling cyclinder and other Hydraulic Elements, attachment.
Claims (10)
1. a kind of high-altitude operation vehicle static pressure leveling system, including workbench (4), turntable (12), level-one arm (14) and two level arm
(15), level-one amplitude oil cylinder (13), two level amplitude oil cylinder (16), active leveling cyclinder (17) and driven leveling cyclinder (5)；Also wrap
Two groups of valve blocks are included, valve block one is mounted at turntable (12), and valve block two is mounted at workbench (4)；By being located on working connection
Three six-way transfer valves (22) come select hydraulic oil enter valve block one or enter valve block two；Valve block one includes turning table control tune
The flexible level-one reversal valve one (19) of flat hand-operated direction valve (11), control level-one amplitude oil cylinder (13) and control two level luffing oil
The flexible two level reversal valve one (18) of cylinder (16), turning table control leveling hand-operated direction valve (11), level-one reversal valve one (19) and two
The oil inlet of grade reversal valve one (18) is connected in parallel on in-line, and oil return opening is connected in parallel on oil return line；Valve block two includes platform courses
The flexible level-one reversal valve two (21) of leveling hand-operated direction valve (1), control level-one amplitude oil cylinder (13) and control two level luffing
The flexible two level reversal valve two (20) of oil cylinder (16), platform hand-operated direction valve (1), level-one reversal valve two (21) and two level reversal valve
The oil inlet of two (20) is connected in parallel on in-line, and oil return opening is connected in parallel on oil return line；It is characterized in that,
The first oil outlet A1, the second oil outlet B1 of turning table control leveling hand-operated direction valve (11) lock pressure valve part with first respectively
Two oil inlets are connected, and the first oil outlet A2, the second oil outlet B2 of platform courses leveling hand-operated direction valve (1) are respectively with second
Two oil inlets for locking pressure valve part are connected, and two oil outlets of the first lock pressure valve part, second lock two oil outlets of pressure valve part, divide
It is not connected in parallel on active leveling cyclinder (17) oil port with the first balanced valve (6) oil inlet V5, the second balanced valve (7) oil inlet V6,
First balanced valve (6) oil outlet C5 is connected to driven leveling cyclinder (5) rodless cavity, the second balanced valve (7) oil outlet C6 with it is driven
Leveling cyclinder (5) rod chamber is connected to.
2. high-altitude operation vehicle static pressure leveling system according to claim 1, which is characterized in that described first, which locks pressure valve part, is
Turntable hydraulic locking (10), the second lock pressure valve part are that platform hydraulic locks (2), and the first of turning table control leveling hand-operated direction valve (11) goes out
Hydraulic fluid port A1, the second oil outlet B1 are connected with the first oil inlet V1 of turntable hydraulic locking (10), the second oil inlet V2 respectively, platform control
The first oil outlet A2, the second oil outlet B2 of leveling hand-operated direction valve (1) processed lock first oil inlet of (2) with platform hydraulic respectively
V3, the second oil inlet V4 are connected, the first oil outlet C1 of turntable hydraulic locking (10) respectively with the first balanced valve (6) oil inlet V5,
Platform hydraulic locks (2) first oil outlet C3, the rodless cavity of active leveling cyclinder (17) is connected, and the second of turntable hydraulic locking (10) goes out
Hydraulic fluid port C2 locks (2) second oil outlet C4, active leveling cyclinder (17) with the second balanced valve (7) oil inlet V6, platform hydraulic respectively
Rod chamber is connected.
3. high-altitude operation vehicle static pressure leveling system according to claim 2, which is characterized in that active leveling cyclinder (17)
The first overflow valve (8) and the second overflow valve (9) are also parallel at rodless cavity and rod chamber, wherein the first overflow valve (8) oil inlet
P3 is connected with active leveling cyclinder (17) rodless cavity, the second overflow valve (9) oil inlet P 4 and active leveling cyclinder (17) rod chamber
It is connected, the first overflow valve (8) oil outlet T3 and the second overflow valve (9) oil outlet T4 take back fuel tank respectively.
4. high-altitude operation vehicle static pressure leveling system according to claim 1, which is characterized in that described first, which locks pressure valve part, is
5th balanced valve (25) and the 6th balanced valve (26), second lock pressure valve part be third balanced valve (23) and the 4th balanced valve (24),
The first oil outlet A1, the second oil outlet B1 of turning table control leveling hand-operated direction valve (11) respectively with the 5th balanced valve (25) into
Hydraulic fluid port V9, the 6th balanced valve (26) oil inlet V10 are connected, the first oil outlet A2 of platform courses leveling hand-operated direction valve (1), the
Two oil outlet B2 are connected with the oil inlet V8 of the oil inlet V7 of third balanced valve (23), the 4th balanced valve (24) respectively, and the 5th is flat
The oil outlet C9 of weighing apparatus valve (25) is adjusted with the first balanced valve (6) oil inlet V5, the oil outlet C7 of third balanced valve (23), active respectively
The rodless cavity of flat oil cylinder (17) is connected, the oil outlet C10 of the 6th balanced valve (26) respectively with the second balanced valve (7) oil inlet V6,
Oil outlet C8, active leveling cyclinder (17) rod chamber of 4th balanced valve (24) are connected.
5. high-altitude operation vehicle static pressure leveling system according to claim 3, which is characterized in that the first balanced valve (6) and
Two balanced valves (7) are external control type balanced valve, and all have positive unlatching control port, and the positive of the first balanced valve (6) is opened
Control port is connected to the oil inlet V6 of the second balanced valve (7), and the positive of the second balanced valve (7) opens control port and first flat
The oil inlet V5 connections of weighing apparatus valve (6), the positive Opening pressure of two balanced valves is no more than 2Mpa.
6. high-altitude operation vehicle static pressure leveling system according to claim 4, which is characterized in that the first balanced valve (6), second
Balanced valve (7) third balanced valve (23), the 4th balanced valve (24), the 5th balanced valve (25) and the 6th balanced valve (26) are external control
Type balanced valve, and positive unlatching control port is all had, the positive of the first balanced valve (6) opens control port and the second balanced valve
(7) oil inlet V6 connections, the positive of the second balanced valve (7) open oil inlet V5 company of the control port with the first balanced valve (6)
Logical, the positive unlatching control port of third balanced valve (23) is connected to the oil inlet V8 of the 4th balanced valve (24), the 4th balanced valve
(24) positive unlatching control port is connected to the oil inlet V7 of third balanced valve (23), and the positive of the 5th balanced valve (25) is opened
Control port is connected to the oil inlet V10 of the 6th balanced valve (26), and the positive of the 6th balanced valve (26) opens control port and the
The oil inlet V9 connections of five balanced valves (25), the positive Opening pressure of above-mentioned all balanced valves is no more than 2Mpa.
7. high-altitude operation vehicle static pressure leveling system according to claim 3, which is characterized in that first overflow valve (8)
It is more than 2~3Mpa of maximum pressure inside leveling hydraulic system with the second overflow valve (9) setting pressure.
8. the high-altitude operation vehicle static pressure leveling system according to claim 1 to 7 any claim, which is characterized in that institute
It states the rod chamber of active leveling cyclinder (17) and driven leveling cyclinder (5) and rodless cavity is both provided with and is blended in fluid for releasing
The vent valve of middle gas.
9. high-altitude operation vehicle static pressure leveling system according to claim 8, which is characterized in that turning table control leveling is changed manually
It is three six logical hand-operated direction valves of Y type Median Functions to valve (11) and platform courses leveling hand-operated direction valve (1).
10. high-altitude operation vehicle static pressure leveling system according to claim 9, which is characterized in that the first balanced valve (6) is fuel-displaced
Mouth C5 is connected by board-like connection type with driven leveling cyclinder (5) rodless cavity, and the second balanced valve (7) oil outlet C6 passes through board-like
Connection type is connected with driven leveling cyclinder (5) rod chamber；Turntable hydraulic locking (10), the first overflow valve (8) and the second overflow valve
(9) it is each attached on turntable (12)；Platform hydraulic lock (2) is fixed on workbench (4).
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| CN110864019A (en) * | 2019-11-28 | 2020-03-06 | 徐州海伦哲特种车辆有限公司 | Digital hydraulic leveling system of working platform of overhead working truck |
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| CN113929019A (en) * | 2021-12-20 | 2022-01-14 | 莱州巨浪机械有限公司 | Multifunctional forklift truck |
| WO2024016529A1 (en) * | 2022-07-18 | 2024-01-25 | 湖南星邦智能装备股份有限公司 | Leveling hydraulic control system and aerial work platform |
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