CN107830001A - A kind of scissor aerial work platform and its hydraulic system - Google Patents
A kind of scissor aerial work platform and its hydraulic system Download PDFInfo
- Publication number
- CN107830001A CN107830001A CN201711211778.7A CN201711211778A CN107830001A CN 107830001 A CN107830001 A CN 107830001A CN 201711211778 A CN201711211778 A CN 201711211778A CN 107830001 A CN107830001 A CN 107830001A
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- Prior art keywords
- valve
- oil
- reversal
- hydraulic system
- reversal valve
- Prior art date
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- 238000007667 floating Methods 0.000 claims abstract description 74
- 239000000446 fuel Substances 0.000 claims abstract description 42
- 238000012163 sequencing technique Methods 0.000 claims description 35
- 239000012530 fluid Substances 0.000 claims description 7
- 230000002045 lasting effect Effects 0.000 abstract description 7
- 238000012840 feeding operation Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 78
- 238000010438 heat treatment Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 239000010729 system oil Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000005303 weighing Methods 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
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
- B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
- B66F11/042—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations actuated by lazy-tongs mechanisms or articulated levers
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/255—Flow control functions
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/88—Control measures for saving energy
Abstract
The invention discloses a kind of hydraulic system, including floating cylinder, the balanced valve for the cavity oil transportation to floating cylinder and the reversal valve being connected with balanced valve；Reversal valve is connected as the oil feed pump of its fuel feeding；Also include being used for the running gear oil-feed port for reversal valve fuel feeding, reversal valve connects running gear oil-feed port by the first check valve, and reversal valve connects oil feed pump by the second check valve.In hydraulic system provided by the present invention, main fuel feeding operation is carried out by floating cylinder of the running gear oil-feed port into system, auxiliary feed-oil operation is carried out by floating cylinder of the oil feed pump into system, so that the fuel feeding operation of floating cylinder can be mainly by obtaining in running gear, less state can then be reduced to by the flow of fuel feeding oil pump feed side, the situation of lasting flow high pressure kicks is not had then, efficiency is improved significantly.The invention also discloses a kind of scissor aerial work platform for including above-mentioned hydraulic system.
Description
Technical field
The present invention relates to technical field of hydraulic, more specifically to a kind of hydraulic system.In addition, the present invention is also
It is related to a kind of scissor aerial work platform for including above-mentioned hydraulic system.
Background technology
When being walked on the road of injustice, in order to improve the steady comfortableness of vehicle, left and right tire needs according to road scissor
Condition automatic controlled height, compensate the influence of Uneven road.
Now generally by the way of and balancing valve in parallel using two floating cylinders, preferentially drawn by flow control valve from pump
Pressure oil is entered floating cylinder all the way, realizes the automatic compensation to uneven road surface in walking process.
The diesel oil scissor of prior art fluid of function control pump under operating mode of walking is supplied to float trap block, and greatly
Whole flows of part-time function control pump all supply float trap block, and flow back to fuel tank by low pressure relief valve, and fluid pump carries
The energy of confession all flogs a dead horse for generating heat, and causes to be unfavorable for that system effectiveness improves, unfavorable hot environment works long hours
Problem, so it is generally necessary to increase radiator, but will so be unfavorable for the control of system cost.
In summary, how a kind of efficiency high, the low hydraulic system of heating are provided, be current those skilled in the art urgently
Solve the problems, such as.
The content of the invention
In view of this, it is an object of the invention to provide a kind of hydraulic system, the efficiency high of the hydraulic system, heating are low.
It is a further object of the present invention to provide a kind of scissor aerial work platform for including above-mentioned hydraulic system.
To achieve these goals, the present invention provides following technical scheme：
A kind of hydraulic system, for scissor aerial work platform, including floating cylinder, for the floating cylinder
The balanced valve of cavity oil transportation and the reversal valve being connected with the balanced valve；The reversal valve is connected as the oil feed pump of its fuel feeding；
Also include being used for the running gear oil-feed port for the reversal valve fuel feeding, the reversal valve connects the row by the first check valve
Walking system oil-feed port, the reversal valve connect the oil feed pump by the second check valve.
Preferably, the entrance of second check valve connects the oil feed pump, the flow control by flow control valve
Another outlet connecting moves duty valve block of valve.
Preferably, the reversal valve includes the first reversal valve and the second reversal valve；The balanced valve includes the first balanced valve
With the second balanced valve；
The 3rd mouthful of first reversal valve is all connected with first check valve with the 3rd mouthful of second reversal valve
Outlet；First reversal valve and second reversal valve are also connected with oil return box；
The first of first reversal valve connects the of second mouthful of first balanced valve and second balanced valve
Two mouthfuls, the first of first connection first balanced valve of second reversal valve and the first of second balanced valve
Mouthful.
Preferably, the floating cylinder includes left floating cylinder and right floating cylinder；
Two of first balanced valve export the rod chamber and rodless cavity for connecting the left floating cylinder respectively, and described the
Two of two balanced valves export the rod chamber and rodless cavity for connecting the right floating cylinder respectively.
Preferably, the outlet of first check valve and the outlet of second check valve are connected to determine to float respectively
The overflow valve of oil cylinder safe pressure, the outlet of the overflow valve connect the oil return box.
Preferably, the oil-feed port of the oil feed pump is connected to control whether the 3rd commutation to holding function valve block fuel feeding
The entrance of valve, another outlet of the flow control valve and the outlet of the 3rd reversal valve are connected in parallel, and described in connection
Holding function valve block.
Preferably, in addition to by Stress control of walking filled to the hydraulic control unit of holding function valve block fuel feeding, the hydraulic control
Put and be connected with the running gear oil-feed port, to obtain the walking pressure of running gear, and the hydraulic control unit and described the
Three reversal valves connect.
Preferably, the hydraulic control unit include shuttle valve and for oil feed pump described in the 3rd reversal valve co- controlling to
The pilot sequencing valve of holding function valve block fuel feeding；
The two entrances of the shuttle valve are connected respectively outlet and the fuel feeding of the oil feed pump of first check valve
Mouthful, the outlet of the shuttle valve connects the outside control mouth of the pilot sequencing valve；
The entrance of the pilot sequencing valve connects the oil-feed port of the oil feed pump, the outlet connection institute of the pilot sequencing valve
State the entrance of the 3rd reversal valve；
When pressure of walking is less than the pilot sequencing valve setting value, the pilot sequencing valve is resetted to control to described floating
Dynamic oil cylinder fuel feeding；
When pressure of walking is equal to or higher than the pilot sequencing valve setting value, the pilot sequencing valve is opened to realize
State holding function valve block off-load.
A kind of scissor aerial work platform, including hydraulic system, the hydraulic system are described in above-mentioned any one
Hydraulic system.
In hydraulic system provided by the present invention, carried out by floating cylinder of the running gear oil-feed port into system main
Fuel feeding operates, and auxiliary feed-oil operation is carried out by floating cylinder of the oil feed pump into system, so that the fuel feeding of floating cylinder
Operation can then reduce to less state, then not mainly by being obtained in running gear by the flow of fuel feeding oil pump feed side
The situation of lasting flow high pressure kicks is had, would not also produce larger pyrotoxin, energy saving of system, efficiency is substantially carried
It is high.
Present invention also offers a kind of scissor aerial work platform for including above-mentioned hydraulic system.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is a kind of system schematic of the specific embodiment one of hydraulic system provided by the present invention；
Fig. 2 is a kind of system schematic of the specific embodiment two of hydraulic system provided by the present invention.
In Fig. 1-2：
Right floating cylinder 1, left floating cylinder 2；
First balanced valve 3, the second balanced valve 11；First reversal valve 4, the second reversal valve 10；
First check valve 5, the second check valve 9, overflow valve 6, flow control valve 7；
3rd reversal valve 8, shuttle valve 12, pilot sequencing valve 13.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
The core of the present invention is to provide a kind of hydraulic system.Another core of the present invention, which is to provide one kind, includes above-mentioned hydraulic pressure
The scissor aerial work platform of system.
Fig. 1 and Fig. 2 are refer to, Fig. 1 is that a kind of system of the specific embodiment one of hydraulic system provided by the present invention is shown
It is intended to；Fig. 2 is a kind of system schematic of the specific embodiment two of hydraulic system provided by the present invention.
A kind of hydraulic system provided by the present invention, is mainly used in scissor aerial work platform, and hydraulic system includes floating
Dynamic oil cylinder, the balanced valve for the cavity oil transportation to floating cylinder and the reversal valve being connected with balanced valve；Reversal valve is connected as
The oil feed pump of its fuel feeding, in addition to connected for the running gear oil-feed port for reversal valve fuel feeding, reversal valve by the first check valve 5
Running gear oil-feed port is connect, reversal valve connects oil feed pump by the second check valve 9.
It should be noted that above-mentioned oil feed pump can be used for for reversal valve fuel feeding, that is, it is that floating cylinder carries out fuel feeding,
Certainly, oil feed pump can also be that control function valve block carries out fuel feeding.
Reversal valve is also connected with running gear oil-feed port, to provide fluid by running gear oil-feed port for it, the two it
Between connect the first check valve 4, to avoid fluid from being back to running gear oil-feed port.
In hydraulic system provided by the present invention, carried out by floating cylinder of the running gear oil-feed port into system main
Fuel feeding operates, and auxiliary feed-oil operation is carried out by floating cylinder of the oil feed pump into system, so that the fuel feeding of floating cylinder
Operation can then reduce to less state, then not mainly by being obtained in running gear by the flow of fuel feeding oil pump feed side
The situation of lasting flow high pressure kicks is had, would not also produce larger pyrotoxin, energy saving of system, efficiency is substantially carried
It is high.
On the basis of above-described embodiment, reversal valve includes the first reversal valve 4 and the second reversal valve 10；First reversal valve
The 3rd mouthful of 4 and the 3rd mouthful of outlet for being all connected with the first check valve 4 of the second reversal valve 10.
On the basis of any one above-mentioned embodiment, the entrance of the second check valve 9 is connected by flow control valve 7 to be supplied
Oil pump, another outlet connecting moves duty valve block of flow control valve 7, to realize that off-load operates；First reversal valve 4 and
Two reversal valves 10 are also connected with oil return box.
On the basis of above-described embodiment, balanced valve includes the first balanced valve 3 and the second balanced valve 11；First reversal valve
Second mouthful of 4 first the first balanced valve 3 of connection and second mouthful of the second balanced valve 11, the first of the second reversal valve 10 connects
Connect the first of the first balanced valve 3 and the first of the second balanced valve 11.
In a specific embodiment, above-mentioned hydraulic system floating cylinder, the first balanced valve 3, the second balanced valve 11,
One reversal valve 4, the second reversal valve 10 and flow control valve 7；
Several outlets of first balanced valve 3 correspond to respectively connects the left rod chamber and rodless cavity for connecing floating cylinder 2, and second is flat
Several outlets of weighing apparatus valve 11 are connected respectively the rodless cavity and rod chamber of right floating cylinder 1；
Outlet the first balanced valve 3 of connection of first reversal valve 4 and the entrance of the second balanced valve 11, the second reversal valve 10 go out
Another entrance of mouth the first balanced valve 3 of connection and the second balanced valve 11；
The entrance of the entrance of first reversal valve 4 and the second reversal valve 10 is connected to main fuel feeding by the first check valve 5
Running gear oil-feed port；
The entrance of the entrance of first reversal valve 4 and the second reversal valve 10 passes through the connection traffic control valve 7 of the second check valve 9
Outlet, the entrance of flow control valve 7 is connected to the oil feed pump of auxiliary feed-oil, another outlet connection of flow control valve 7
Holding function valve block is its fuel feeding；First reversal valve 4 and the second reversal valve 10 are also connected with oil return box.
It should be noted that above-mentioned floating cylinder can be two or more, pass through the first balanced valve 3 and second respectively
Balanced valve 11 carries out oil transportation to floating cylinder.The outlet of first reversal valve 4 and the second reversal valve 10 connects corresponding balance respectively
Valve.
In hydraulic system provided by the present invention, carried out by floating cylinder of the running gear oil-feed port into system main
Fuel feeding is operated, and auxiliary feed-oil operation is carried out by floating cylinder of the oil feed pump into system, and is also provided with and the first commutation
The reversal valve 10 of valve 4 and second connection oil return box so that floating cylinder fuel feeding operation can by being obtained in running gear,
Realize that mobile operated with walking of the lifting of floating cylinder is synchronous, the situation that system does not have lasting flow high pressure kicks is deposited
Pyrotoxin, energy saving of system are being eliminated, efficiency is improved significantly.
On the basis of above-described embodiment, the outlet of the first check valve 4 and the outlet of the second check valve 10 connect respectively
For determining the overflow valve 6 of floating cylinder safe pressure, the outlet connection oil return box of overflow valve 6.
On the basis of above-described embodiment, the oil-feed port of oil feed pump is connected to control whether to supply to holding function valve block
The entrance of 3rd reversal valve 8 of oil, another outlet and the outlet of the 3rd reversal valve 8 of flow control valve 7 are connected in parallel, and even
Connect holding function valve block.3rd reversal valve 8 is connected with holding function valve, to realize the function of off-load.
In the specific embodiment that the application provides, the b mouths of the pressure oil supply flow rate control valve 7 of oil feed pump and the
The entrance of three reversal valves 8.
The a mouths of flow control valve 7 are connected with the entrance of the second check valve 9, the commutation of outlet connection first of the second check valve 9
The entrance of the c mouths of valve 4, the b mouths of the second reversal valve 10 and overflow valve 6, and the outlet of the second check valve 9 and running gear oil-feed port
P2 is connected.
The c mouths of flow control valve 7 are in parallel with the outlet of the 3rd reversal valve 8 to be used as downstream holding function valve block entrance, that is, connects
Connect holding function valve block.
The outlet a of first reversal valve 4 is connected with the entrance b of the entrance b of the first balanced valve 3, the second balanced valve 11,
The outlet a of second reversal valve 10 is connected with the entrance a of the entrance a of the first balanced valve 3, the second balanced valve 11；
The b mouths of first reversal valve 4, the c mouths of the second reversal valve 10 are connected with the outlet of overflow valve 6, and connect oil return box.
Outlet c, outlet the d connection corresponding with the rod chamber and rodless cavity of left floating cylinder 2 respectively of first balanced valve 3, the
Outlet c, outlet the d connection corresponding with the rodless cavity and rod chamber of right floating cylinder 1 respectively of two balanced valves 11.
It should be noted that floating system oil sources is mainly provided by running gear oil-feed port P2, and by oil feed pump oil-feed port P
Carry out auxiliary feed-oil.Wherein, the fluid of oil feed pump is supplied to oil sources P1 of the downstream as holding function valve group simultaneously.
Whether the 3rd reversal valve 8 control oil feed pump oil-feed port P gives floating cylinder to provide oil sources, floating system safe pressure by
The setting control of overflow valve 6.
Make the pipeline of pressure oil and the pressure oil of oil feed pump of running gear by the first check valve 5 and the second check valve 9
Separate.
Left floating cylinder 2 and right floating cylinder 1 are connected with the first balanced valve 3 and the second balanced valve 11 respectively, and by first
The control of the reversal valve 10 of reversal valve 4 and second opens and closes.
In the scheme that any one above-mentioned embodiment is provided, when platform is normally walked, floating cylinder is by walking
System oil-feed port P2 DFF Direct Fuel Feeds, oil feed pump oil-feed port P supply by the 3rd reversal valve 8 and by downstream holding function valve off-load
Oil pump P is no longer pass through the overflow of overflow valve 6.However, only being fallen into wheel in hole, when floating pressure is inadequate, the 3rd reversal valve 8 is
Breakdown action, oil feed pump oil-feed port P fuel feeding is to floating cylinder.
In technical solution of the present invention, by changing floating oil sources, the lifting movement and walking operation of realizing floating cylinder are
Synchronous, the oil sources of floating cylinder operation not directly from fuel feeding pumping oil, but uses the pressure of running gear in normal walking
Power oil；Pump output flow, through holding function valve block off-load, the situation that system does not have lasting flow high pressure kicks is present, and removes
Pyrotoxin, energy saving of system, efficiency are improved significantly.
On the basis of above-described embodiment, in addition to pass through hydraulic control of the Stress control to holding function valve block fuel feeding of walking
Device, hydraulic control unit are connected with running gear oil-feed port, to when feelings of the running gear pressure less than the Opening pressure of balanced valve
Under condition, the oil sources of auxiliary feed-oil pump can be obtained automatically, and hydraulic control unit combines with the 3rd reversal valve 8, realizes that normal pressure aids in
The off-load of oil feed pump.
It should be noted that hydraulic control unit is that can be magnetic valve controller, for by Stress control of walking to dynamic
Make duty valve block fuel feeding, specifically, hydraulic control unit is connected with running gear oil-feed port, to obtain the walking pressure of running gear
Power, oil pressure can be obtained by detection means, or oil pressure is directly obtained by hydraulic control unit, when walking pressure is less than
During 13 setting value of pilot sequencing valve, hydraulic control unit control floating cylinder fuel feeding, when walking pressure is equal to or higher than pilot sequencing valve
During 13 setting value, pilot sequencing valve is opened to realize holding function valve block off-load.
On the basis of above-described embodiment, hydraulic control unit include shuttle valve 12 and for the co- controlling of the 3rd reversal valve 8
Pilot sequencing valve 13 of the oil feed pump to holding function valve block fuel feeding.
The two entrances of shuttle valve 12 are connected respectively the outlet of the first check valve 5 and the oil-feed port of oil feed pump, shuttle valve 12
Outlet connection pilot sequencing valve 13 outside control mouth.
The oil-feed port of the entrance connection oil feed pump of pilot sequencing valve 13, the outlet of pilot sequencing valve 13 connects the 3rd reversal valve
8 entrance.
When pressure of walking is less than 13 setting value of pilot sequencing valve, pilot sequencing valve resets to be supplied with controlling to floating cylinder
Oil；When pressure of walking is equal to or higher than 13 setting value of pilot sequencing valve, pilot sequencing valve is opened to realize holding function valve block
Off-load, so as to avoid the occurrence of lasting overflow.
Fig. 2 is refer to, Fig. 2 is a kind of system schematic of the specific embodiment two of hydraulic system provided by the present invention.
As shown in Fig. 2 be with Fig. 1 difference, in addition to shuttle valve 12 and pilot sequencing valve 13.
The b mouths of pressure oil supply flow rate control valve 7 and the entrance of pilot sequencing valve 13 of oil feed pump, the entrance point of shuttle valve 12
Pressure source P2 not with oil feed pump P and running gear is connected, and the outlet of shuttle valve is connected with the outside control mouth of pilot sequencing valve 13, hydraulic control
The outlet of sequence valve 13 is connected with the entrance of the 3rd reversal valve 8.
Floating system oil sources is provided by oil feed pump P and running gear P2, and the fluid of oil feed pump is supplied to downstream conduct simultaneously
The oil sources P1 of holding function valve group.
Whether the co- controlling oil feed pump P of 13 and second reversal valve of pilot sequencing valve 10 gives float trap block offer oil sources, works as row
When walking system oil liquid pressure is less than 13 setting value of pilot sequencing valve, it is ensured that pump P fuel feeding is to floating system.
On the basis of any one above-mentioned embodiment, floating cylinder includes left floating cylinder 2 and right floating cylinder 1；
Two outlets of the first balanced valve 3 connect the rod chamber and rodless cavity of floating cylinder 2, two outlets of the second balanced valve 11 respectively
The rod chamber and rodless cavity of floating cylinder 1 are connected respectively.
Optionally, when the species difference of scissor aerial work platform, there may also be multiple floating cylinders, and it is some
Individual floating cylinder needs to be controlled from different balanced valves.
On the basis of any one above-mentioned embodiment, the first balanced valve 3 includes at least two entrances and at least two
Outlet.
On the basis of any one above-mentioned embodiment, the first reversal valve 4, the first check valve 5, overflow valve 6, flow control
Valve 7, the 3rd reversal valve 8, the second check valve 9 and the second reversal valve 10 processed are integrated in floating integrated valve block.
Optionally, above-mentioned shuttle valve 12 and pilot sequencing valve 13 can also be integrated in above-mentioned floating integrated valve block, Huo Zhesuo
Valve 12 and pilot sequencing valve 13 can also be integrated in the valve block of other results, to be coupled between block.
Hydraulic system provided by the present invention is by changing the oil sources of floating cylinder so that rocker operation can with walking operation
Synchronous to realize, floating oil sources uses running gear pressure oil under normal circumstances not directly from fuel feeding pumping oil；Oil feed pump
Through holding function valve block off-load, the situation that system does not have lasting flow high pressure kicks exists output flow, eliminates pyrotoxin,
Energy saving of system, efficiency are improved significantly；When holding function valve group works, running gear and floating cylinder do not work, oil feed pump
The supply of the normal assurance function control valve block of energy, and flow control valve is needed not move through, reduce pyrotoxin.
Except the primary structure for the hydraulic system that above-mentioned each embodiment is provided, the present invention also provides a kind of including above-mentioned
The scissor aerial work platform of hydraulic system disclosed in embodiment, the scissor aerial work platform include above-mentioned hydraulic pressure system
System, hydraulic system can avoid the situation that efficiency is low, heating is big, the structure of other each several parts of the scissor aerial work platform
Prior art is refer to, is repeated no more herein.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
Scissor aerial work platform provided by the present invention and its hydraulic system are described in detail above.Herein
In apply specific case to the present invention principle and embodiment be set forth, the explanation of above example is only intended to help
Assistant solves the method and its core concept of the present invention.It should be pointed out that for those skilled in the art, not
On the premise of departing from the principle of the invention, some improvement and modification can also be carried out to the present invention, these are improved and modification is also fallen into
In the protection domain of the claims in the present invention.
Claims (9)
1. a kind of hydraulic system, for scissor aerial work platform, including floating cylinder, for the chamber of the floating cylinder
The balanced valve of body oil transportation and the reversal valve being connected with the balanced valve；The reversal valve is connected as the oil feed pump of its fuel feeding；Its
It is characterised by, in addition to passes through the first check valve for the running gear oil-feed port for the reversal valve fuel feeding, the reversal valve
(5) the running gear oil-feed port is connected, the reversal valve connects the oil feed pump by the second check valve (9).
2. hydraulic system according to claim 1, it is characterised in that the entrance of second check valve (9) passes through flow
Control valve (7) connects the oil feed pump, another outlet connecting moves duty valve block of the flow control valve (7).
3. hydraulic system according to claim 2, it is characterised in that the reversal valve includes the first reversal valve (4) and the
Two reversal valves (10)；The balanced valve includes the first balanced valve (3) and the second balanced valve (11)；
The 3rd mouthful of first reversal valve (4) is all connected with first check valve with the 3rd mouthful of second reversal valve (10)
(5) outlet；First reversal valve (4) and second reversal valve (10) are also connected with oil return box；
The first of first reversal valve (4) connects second mouthful and second balanced valve of first balanced valve (3)
(11) second mouthful, the first of second reversal valve (10) connects the first and described the of first balanced valve (3)
The first of two balanced valves (11).
4. hydraulic system according to claim 3, it is characterised in that the floating cylinder include left floating cylinder (2) and
Right floating cylinder (1)；
Two of first balanced valve (3) export the rod chamber and rodless cavity for connecting the left floating cylinder (2) respectively, described
Two of second balanced valve (11) export the rod chamber and rodless cavity for connecting the right floating cylinder (1) respectively.
5. hydraulic system according to claim 2, it is characterised in that the outlet of first check valve (5) and described
The outlet of two check valves (10) is connected to determine respectively the overflow valve (6) of floating cylinder safe pressure, the overflow valve (6)
Outlet connects the oil return box.
6. according to the hydraulic system described in any one of claim 2 to 5, it is characterised in that the oil-feed port connection of the oil feed pump
For controlling whether the entrance of the 3rd reversal valve (8) to holding function valve block fuel feeding, the flow control valve (7) another
Export the outlet with the 3rd reversal valve (8) to be connected in parallel, and connect the holding function valve block.
7. hydraulic system according to claim 6, it is characterised in that also include by Stress control of walking to holding function
The hydraulic control unit of valve block fuel feeding, the hydraulic control unit are connected with the running gear oil-feed port, to obtain the row of running gear
Pressure is walked, and the hydraulic control unit is connected with the 3rd reversal valve (8).
8. hydraulic system according to claim 7, it is characterised in that the hydraulic control unit include shuttle valve (12) and for
Pilot sequencing valve (13) of the oil feed pump to holding function valve block fuel feeding described in 3rd reversal valve (8) co- controlling；
The two entrances of the shuttle valve (12) are connected respectively the outlet of first check valve (5) and the confession of the oil feed pump
Hydraulic fluid port, the outlet of the shuttle valve (12) connect the outside control mouth of the pilot sequencing valve (13)；
The entrance of the pilot sequencing valve (13) connects the oil-feed port of the oil feed pump, and the outlet of the pilot sequencing valve (13) connects
Connect the entrance of the 3rd reversal valve (8)；
When pressure of walking is less than the pilot sequencing valve (13) setting value, the pilot sequencing valve is resetted to control to described floating
Dynamic oil cylinder fuel feeding；
When pressure of walking is equal to or higher than the pilot sequencing valve (13) setting value, the pilot sequencing valve is opened to realize
State holding function valve block off-load.
9. a kind of scissor aerial work platform, including hydraulic system, it is characterised in that the hydraulic system is claim 1
To the hydraulic system described in 8 any one.
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| CN201711211778.7A CN107830001B (en) | 2017-11-28 | 2017-11-28 | Scissor fork type aerial work platform and hydraulic system thereof |
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| CN112012974A (en) * | 2020-08-24 | 2020-12-01 | 天水师范学院 | Novel hydraulic synchronous control system for lifting and lowering of oil drilling machine |
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| CN112012974A (en) * | 2020-08-24 | 2020-12-01 | 天水师范学院 | Novel hydraulic synchronous control system for lifting and lowering of oil drilling machine |
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| Publication number | Publication date |
|---|---|
| CN107830001B (en) | 2023-10-27 |
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Address after: 410600 Jinzhou Avenue East 128, Ningxiang hi tech Industrial Park, Changsha, Hunan Applicant after: Hunan Xingbang Intelligent Equipment Co.,Ltd. Address before: 410600, No. 128, Jinzhou East Road, Ningxiang hi tech Development Zone, Hunan, Changsha Applicant before: HUNAN SINOBOOM HEAVY INDUSTRY Co.,Ltd. |
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