CN108298441A - The control method and dedicated control system of crane stretch - Google Patents
The control method and dedicated control system of crane stretch Download PDFInfo
- Publication number
- CN108298441A CN108298441A CN201810277039.6A CN201810277039A CN108298441A CN 108298441 A CN108298441 A CN 108298441A CN 201810277039 A CN201810277039 A CN 201810277039A CN 108298441 A CN108298441 A CN 108298441A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000003921 oil Substances 0.000 claims abstract description 124
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 51
- 230000008602 contraction Effects 0.000 claims abstract description 39
- 238000005096 rolling process Methods 0.000 claims abstract description 36
- 239000000725 suspension Substances 0.000 claims abstract description 14
- 239000000446 fuel Substances 0.000 claims abstract description 11
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims description 98
- 230000005611 electricity Effects 0.000 claims description 18
- 239000002828 fuel tank Substances 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 6
- 230000008676 import Effects 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims description 2
- 239000010727 cylinder oil Substances 0.000 abstract 1
- 238000005086 pumping Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
- B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Jib Cranes (AREA)
Abstract
The present invention gives a kind of control methods of crane stretch, include the following steps：Control elevator falls suspension hook；Oil cylinder bolt mechanism and the arm to be stretched out at first coordinate, and telescopic oil cylinder oil pump and elevator oil pump are simultaneously to the rodless cavity fuel feeding of telescopic oil cylinder, until predetermined flexible stroke；The oil pump of telescopic oil cylinder controls telescopic oil cylinder and is contracted to minimum stroke to the rod chamber fuel feeding of telescopic oil cylinder；Meanwhile the oil pump of elevator is to elevator fuel feeding；It repeats the above steps, completes crane stretch.The present invention gives a kind of dedicated control system for realizing above-mentioned control method；Pilot valve is raised including hydraulic oil pump, extension and contraction control valve, contracting arm pilot valve, semi-girder pilot valve, converging valve, interflow pilot valve, rolling control valve, lift winch pilot valve, doffing.This system can improve semi-girder speed in semi-girder, using Dual-pump flow-converging；In contracting arm, realize that pumping band contracting arm oil cylinder by list bounces back by being closed elevator follow-up switch, driving elevator falls another pump automatically.
Description
Technical field
The present invention relates to a kind of control methods of crane stretch.
The invention further relates to a kind of dedicated control systems of the control method of crane stretch.
Background technology
In existing single-cylinder bolt autocrane, telescoping boom is usually made of multistage joint arm, the elevator of telescoping boom
Servo-actuated is during stretching out or retract with arm in telescopic boom cylinder, to be performed simultaneously the corresponding actions of elevator.This control
Mode processed sacrifices the speed ability of system, while executing during being acted with arm other composite moves and have and comparing
Security risk.
Invention content
Technical problem to be solved by the invention is to provide a kind of stretches rapidly, of the working efficiency of raising complete machine
The control method of heavy-duty machine stretch.
The technical problem to be solved by the present invention is to also provide a kind of special control of the control method of crane stretch
System processed.
In order to solve the above technical problems, the present invention provides a kind of control method of crane stretch, including it is following
Step：
A) control elevator falls suspension hook, and length of the suspension hook apart from crane arm upper end is pre- not less than telescopic oil cylinder
Surely stretch stroke；
B) oil cylinder bolt mechanism coordinates with the arm stretched out is needed at first, the hydraulic oil pump belonging to telescopic oil cylinder and elevator institute
The hydraulic oil pump of category is simultaneously to the rodless cavity fuel feeding of telescopic oil cylinder, and control telescopic oil cylinder stretches out, and telescopic oil cylinder drives this joint arm to stretch
Go out, elevator is failure to actuate while telescopic oil cylinder acts, up to telescopic oil cylinder to predetermined flexible stroke, oil cylinder bolt mechanism and the section
Arm is detached from, and arm bolt mechanism coordinates with the joint arm, this joint arm completes stretch；
C) hydraulic oil pump belonging to telescopic oil cylinder controls telescopic oil cylinder and is contracted to minimum to the rod chamber fuel feeding of telescopic oil cylinder
Stroke；It being shunk simultaneously in telescopic oil cylinder, starts elevator, the hydraulic oil pump belonging to elevator moves suspension hook and falls to elevator fuel feeding, winding,
Suspension hook distance of fall can start next section and the arm of semi-girder is needed to act not less than the predetermined flexible stroke of telescopic oil cylinder；
D) step a) to step c) is repeated, until arm extend out to precalculated position, completes crane stretch.
After such method, when executing stretch, belonging to the hydraulic oil pump and elevator belonging to telescopic oil cylinder
Hydraulic oil pump simultaneously to telescopic oil cylinder interflow can improve semi-girder speed；Execute contracting arm action when, by closure elevator with
Dynamic switch drives telescopic oil cylinder retraction, the hydraulic oil pump belonging to elevator to drive volume automatically by the hydraulic oil pump belonging to telescopic oil cylinder
Raise whereabouts.
The advantageous effects of this method are：Achieve the purpose that suspension hook distance away the ground keeps interim consistent, avoids lifting
Accident occurs, and improves processing safety, while improving the working efficiency of complete machine, effectively reduces operation difficulty, improves safe operation
The working efficiency of property and autocrane.
In order to solve the above technical problems, the present invention also provides a kind of control methods for realizing above-mentioned crane stretch
Dedicated control system；
Including the first hydraulic oil pump, the second hydraulic oil pump, extension and contraction control reversal valve, converging valve, rolling control reversal valve,
One flow compensation valve and second flow recuperation valve；
First hydraulic oil pump takes oil, the first hydraulic oil pump to be connect with telescopic oil cylinder by extension and contraction control reversal valve from fuel tank,
Extension and contraction control reversal valve is controlled by contracting arm electricity proportional pilot valve and semi-girder electricity proportional pilot valve respectively, and extension and contraction control reversal valve is set
There are the first oil inlet, the first hydraulic fluid port, the second hydraulic fluid port, third hydraulic fluid port, the 4th hydraulic fluid port, the 5th hydraulic fluid port and the first oil outlet, control of stretching
Reversal valve processed is connect by the first oil inlet with the delivery outlet of the first hydraulic oil pump, the first oil outlet of extension and contraction control reversal valve with
Fuel tank is connected to, and the first hydraulic fluid port of extension and contraction control reversal valve is connected to the rod chamber of telescopic oil cylinder, and the second of extension and contraction control reversal valve
Hydraulic fluid port is connected to the rodless cavity of telescopic oil cylinder, and first flow recuperation valve includes the first import and first outlet, extension and contraction control commutation
The third hydraulic fluid port of valve and the first inlet communication of first flow recuperation valve, the first outlet of first flow recuperation valve respectively with it is flexible
Control the 4th hydraulic fluid port and the connection of the 5th hydraulic fluid port of reversal valve；
Second hydraulic oil pump takes oil, the second hydraulic oil pump to be connect with elevator by rolling control reversal valve from fuel tank, elevator
Control reversal valve is raised electric proportional pilot valve by lift winch electricity proportional pilot valve and doffing respectively and is controlled, and rolling control reversal valve is set
There are the second oil inlet, the 6th hydraulic fluid port, the 7th hydraulic fluid port, the 8th hydraulic fluid port, the 9th hydraulic fluid port, the tenth hydraulic fluid port and the second oil outlet, elevator control
Reversal valve processed is connect by the second oil inlet with the delivery outlet of the second hydraulic oil pump, the second oil outlet of rolling control reversal valve with
Fuel tank is connected to, and the 6th hydraulic fluid port of rolling control reversal valve and the 7th hydraulic fluid port are connected to elevator respectively, and second flow recuperation valve includes
Second import and second outlet, the second inlet communication of the 8th hydraulic fluid port and second flow recuperation valve of rolling control reversal valve, the
The second outlet of two flow compensation valves is connected to the 9th hydraulic fluid port of rolling control reversal valve and the tenth hydraulic fluid port respectively；
It is connected to by converging valve between the delivery outlet of first hydraulic oil pump and the delivery outlet of the second hydraulic oil pump, converging valve is logical
The interflow electricity proportional pilot valve control crossed.
First is equipped with as the preferred of this system, between the first oil inlet and the first oil outlet of extension and contraction control reversal valve to overflow
Flow valve；
The second overflow valve is equipped between the second oil inlet and the second oil outlet of rolling control reversal valve.
As the preferred of this system, the rod chamber and rodless cavity of telescopic oil cylinder and the first hydraulic fluid port of extension and contraction control reversal valve and
Telescopic arm balanced valve is equipped between second hydraulic fluid port.
As the preferred of this system, elevator is equipped between elevator and the 6th hydraulic fluid port and the 7th hydraulic fluid port of rolling control reversal valve
Balanced valve.
After such structure, the folding and unfolding action of the expanding-contracting action and elevator of telescopic oil cylinder can be fast implemented, and
Can flexibly control the working condition of the first hydraulic oil pump and the second hydraulic oil pump using this dedicated control system, realize interflow or
Person's isolated operation, the dedicated control system fully meet the technology requirement of the control method of crane stretch.
Description of the drawings
Fig. 1 is one of the usage state diagram of the control method embodiment of this crane stretch.
Fig. 2 is the two of the usage state diagram of the control method embodiment of this crane stretch.
Fig. 3 is the three of the usage state diagram of the control method embodiment of this crane stretch.
Fig. 4 is the hydraulic principle schematic diagram of this dedicated control system embodiment.
Fig. 5 is the hydraulic schematic diagram of this dedicated control system embodiment extension and contraction control reversal valve.
Fig. 6 is the hydraulic schematic diagram of this dedicated control system embodiment rolling control reversal valve.
Fig. 7 is the electric appliance functional block diagram of this dedicated control system embodiment PLC control circuits.
Specific implementation mode
As shown in Figs. 4-6
This dedicated control system includes the first hydraulic oil pump 15, the second hydraulic oil pump 16, extension and contraction control reversal valve 2, interflow
It is valve 3, rolling control reversal valve 4, the first overflow valve 9, the second overflow valve 10, telescopic arm balanced valve 5, elevator balanced valve 7, first-class
Measure recuperation valve 11 and second flow recuperation valve 12.
First hydraulic oil pump 15 takes oil, the first hydraulic oil pump 15 to pass through extension and contraction control reversal valve 2 and telescopic oil cylinder 6 from fuel tank
Connection, extension and contraction control reversal valve 2 by contracting arm electricity proportional pilot valve 2-1 and the 2-2 controls of semi-girder electricity proportional pilot valve, stretch respectively
It controls reversal valve 2 and is equipped with the first oil inlet 2a, the first hydraulic fluid port 2b, the second hydraulic fluid port 2c, third hydraulic fluid port 2d, the 4th hydraulic fluid port 2e, the 5th
Hydraulic fluid port 2f and the first oil outlet 2g, the delivery outlet that extension and contraction control reversal valve 2 passes through the first oil inlet 2a and the first hydraulic oil pump 15
Connection, the first oil outlet 2g of extension and contraction control reversal valve 2 is connected to fuel tank, the first oil inlet 2a of extension and contraction control reversal valve 2 with
The first overflow valve 9 is equipped between first oil outlet 2g, the first hydraulic fluid port 2b of extension and contraction control reversal valve 2 has bar with telescopic oil cylinder 6
Chamber is connected to, and the second hydraulic fluid port 2c of extension and contraction control reversal valve 2 is connected to the rodless cavity of telescopic oil cylinder 6, the rod chamber of telescopic oil cylinder 6 with
Telescopic arm balanced valve 5 is equipped between rodless cavity and the first hydraulic fluid port 2b and the second hydraulic fluid port 2c of extension and contraction control reversal valve 2；
First flow recuperation valve 11 be equipped with the first import and first outlet, the third hydraulic fluid port 2d of extension and contraction control reversal valve 2 with
First inlet communication of first flow recuperation valve 11, the first outlet of first flow recuperation valve 11 respectively with extension and contraction control reversal valve
2 the 4th hydraulic fluid port 2e and the 5th hydraulic fluid port 2f connections.
Second hydraulic oil pump 16 takes oil, the second hydraulic oil pump 16 to connect by rolling control reversal valve 4 and elevator 8 from fuel tank
It connects, rolling control reversal valve 4 is raised electric proportional pilot valve 4-1 by lift winch electricity proportional pilot valve 4-2 and doffing respectively and controlled, volume
It raises control reversal valve 4 and is equipped with the second oil inlet 4a, the 6th hydraulic fluid port 4b, the 7th hydraulic fluid port 4c, the 8th hydraulic fluid port 4d, the 9th hydraulic fluid port 4e, the
Ten hydraulic fluid port 4f and the second oil outlet 4g, the output that rolling control reversal valve 4 passes through the second oil inlet 4a and the second hydraulic oil pump 16
Mouthful connection, the second oil outlet 4g of rolling control reversal valve 4 is connected to fuel tank, the 6th hydraulic fluid port 4b of rolling control reversal valve 4 with
7th hydraulic fluid port 4c is connected to elevator 8 respectively, between elevator 8 and the 6th hydraulic fluid port 4b and the 7th hydraulic fluid port 4c of rolling control reversal valve 4
Equipped with elevator balanced valve 7, the second overflow valve is equipped between the second oil inlet 4a and the second oil outlet 4g of rolling control reversal valve 4
10；
Second flow recuperation valve 12 be equipped with the second import and second outlet, the 8th hydraulic fluid port 4d of rolling control reversal valve 4 with
Second inlet communication of second flow recuperation valve 12, the second outlet of second flow recuperation valve 12 respectively with rolling control reversal valve
4 the 9th hydraulic fluid port 4e and the tenth hydraulic fluid port 4f connections.
It is connected to, is closed by converging valve 3 between the delivery outlet of first hydraulic oil pump 15 and the delivery outlet of the second hydraulic oil pump 16
Flow valve 3 by interflow electricity proportional pilot valve 3-1 control.
In the initial state：
The the first hydraulic fluid port 2b acquiescences and third hydraulic fluid port 2d and the first oil outlet 2g conducting states of extension and contraction control reversal valve 2, stretch
The the first oil inlet 2a for controlling reversal valve 2, the second hydraulic fluid port 2c, the 4th hydraulic fluid port 2e, the 5th hydraulic fluid port 2f contract all in off state.
The 6th hydraulic fluid port 4b, the 7th hydraulic fluid port 4c, the 8th hydraulic fluid port 4d, the 9th hydraulic fluid port 4e and second of rolling control reversal valve 4 go out
Conducting state each other between hydraulic fluid port 4g, the second oil inlet 4a of rolling control reversal valve 4 and the tenth hydraulic fluid port 4f are all in breaking shape
State.
The connection of converging valve 3 is also at off state, the delivery outlet of the first hydraulic oil pump 15 and the second hydraulic oil pump 16 it is defeated
It is not turned between outlet.
As shown in fig. 7, the present embodiment can also be combined with PLC control circuits, elevator encoder, handle, elevator are servo-actuated to be opened
Pass, the outer member access system of length of oil cylinder sensor, limiter of moment as PLC.Contracting arm electricity proportional pilot valve 2-1, it stretches
Arm electricity proportional pilot valve 2-2, interflow electricity proportional pilot valve 3-1 export access system as the external of PLC.
It is specifically described the control method of this crane stretch in conjunction with above-mentioned control system, includes the following steps：
A) as shown in Figure 1, control elevator 8 falls suspension hook 14, length of the suspension hook 14 apart from 13 upper end of crane arm
Not less than the predetermined flexible stroke of telescopic oil cylinder 6；
B) as shown in Fig. 2, oil cylinder bolt mechanism coordinates with the arm stretched out is needed at first, control telescopic oil cylinder 6 stretches out, this
The dedicated control system of the control method of crane stretch operates：
It after selected semi-girder purpose integrated mode, is closed elevator and is servo-actuated selecting switch, before semi-girder, PLC passes through length of oil cylinder
Sensor obtains and records the length value L 1 of current telescopic oil cylinder 6.
When semi-girder, PLC controls the electric proportional pilot valve 3-1 work of semi-girder electricity proportional pilot valve 2-2 and interflow, collaborates electric ratio
Pilot valve 3-1 control converging valves 3 are opened, and the first hydraulic oil pump 15, the second hydraulic oil pump 16 are collaborated by converging valve 3, together
When be input to extension and contraction control reversal valve 2；
Semi-girder electricity proportional pilot valve 2-2 starts, and oil circuit changes in extension and contraction control reversal valve 2, the first oil inlet 2a and third
Hydraulic fluid port 2d conductings, the first hydraulic fluid port 2b are connected with the first oil outlet 2g, and the second hydraulic fluid port 2c is connected with the 5th hydraulic fluid port 2f, the 4th hydraulic fluid port 2e
In off state, realize that telescopic oil cylinder 6 is stretched out with joint arm by telescopic arm balanced valve 5, elevator 8 is kept not during this
Dynamic, suspension hook 14 is slowly increased with joint arm stretching.
After semi-girder oil cylinder reaches predetermined extended position, PLC is obtained by length of oil cylinder sensor and is recorded when extension
The length of contracting oil cylinder 6 is to L2, while joint arm arm pin will stretch out 13 locking of arm gone；PLC is obtained current by limiter of moment
Operating mode multiplying power N.
C) as shown in figure 3, after the joint arm locking that joint arm arm pin goes stretching, telescopic oil cylinder 6 is in light condition, needs
Initial position is returned to, needs to execute 6 retracting action of telescopic oil cylinder, the special control of the control method of this crane stretch
System operatio is：
PLC controls contracting arm electricity proportional pilot valve 2-1 and doffing raises electric proportional pilot valve 4-1 work, contracting arm electricity proportion pilot
Valve 2-1 starts, and oil circuit changes in extension and contraction control reversal valve 2, and the first oil inlet 2a is connected with third hydraulic fluid port 2d, the first hydraulic fluid port 2b and
4th hydraulic fluid port 2e conductings, the second hydraulic fluid port 2c are connected with the first oil outlet 2g, and the 5th hydraulic fluid port 2f is in off state, the first hydraulic oil
Pump 15, to the rod chamber fuel feeding of telescopic oil cylinder 6, realizes 6 retracting action of telescopic oil cylinder by extension and contraction control reversal valve 2；
While telescopic oil cylinder 6 bounces back, doffing is raised electric proportional pilot valve 4-1 and is started, oil circuit in rolling control reversal valve 4
Change, the second oil inlet 4a is connected with the 8th hydraulic fluid port 4d, and the 6th hydraulic fluid port 4b is connected with the second oil outlet 4g, the 7th hydraulic fluid port 4c and the
Ten hydraulic fluid port 4f conductings, the 9th hydraulic fluid port 4e are in off state, and the second hydraulic oil pump 16 is by rolling control reversal valve 4 to elevator 8
Fuel feeding realizes that doffing raises 8 actions.And the whereabouts length La of 8 steel wire rope of elevator is recorded by elevator encoder.As La=N x
(L2-L1) when, stop the control that electric proportional pilot valve 4-1 is raised to doffing, the doffing for reaching stopping elevator 8 raises 8 actions；It is reached with this
To keeping 14 distance away the ground of suspension hook consistent with before semi-girder, 14 distance of fall of suspension hook makes a reservation for flexible row not less than telescopic oil cylinder 6
Journey.
D) step a) to step c) is repeated, the stretch of next joint arm can be executed or starts lifting operation, directly
It is extend out to precalculated position to arm 13, completes crane stretch.
Above-described is only one embodiment of the present invention, it is noted that for those of ordinary skill in the art
For, without departing from the principle of the present invention, several variations and modifications can also be made, these also should be regarded as belonging to this hair
Bright protection domain.
Claims (5)
1. a kind of control method of crane stretch, includes the following steps：
A) control elevator falls suspension hook, and length of the suspension hook apart from crane arm upper end is stretched not less than the predetermined of telescopic oil cylinder
Indention journey；
B) oil cylinder bolt mechanism coordinates with the arm stretched out is needed at first, belonging to the hydraulic oil pump and elevator belonging to telescopic oil cylinder
Hydraulic oil pump is simultaneously to the rodless cavity fuel feeding of telescopic oil cylinder, and control telescopic oil cylinder stretches out, and telescopic oil cylinder drives this joint arm to stretch out, and stretches
Elevator is failure to actuate while contracting cylinder action, up to telescopic oil cylinder to predetermined flexible stroke, oil cylinder bolt mechanism and the section arm
It is detached from, arm bolt mechanism coordinates with the joint arm, this joint arm completes stretch；
C) hydraulic oil pump belonging to telescopic oil cylinder controls telescopic oil cylinder and is contracted to minimum row to the rod chamber fuel feeding of telescopic oil cylinder
Journey；It is shunk simultaneously in telescopic oil cylinder, starts elevator, the hydraulic oil pump belonging to elevator moves suspension hook and fall, hang to elevator fuel feeding, winding
Hook distance of fall can start next section and the arm of semi-girder is needed to act not less than the predetermined flexible stroke of telescopic oil cylinder；
D) step a) to step c) is repeated, until arm extend out to precalculated position, completes crane stretch.
2. a kind of dedicated control system of control method that realizing the crane stretch described in claim 1, it is characterized in that：
Including the first hydraulic oil pump, the second hydraulic oil pump, extension and contraction control reversal valve, converging valve, rolling control reversal valve, first-class
Measure recuperation valve and second flow recuperation valve；
First hydraulic oil pump takes oil, the first hydraulic oil pump to be connect with telescopic oil cylinder by extension and contraction control reversal valve from fuel tank, stretches
It controls reversal valve to control by contracting arm electricity proportional pilot valve and semi-girder electricity proportional pilot valve respectively, extension and contraction control reversal valve is equipped with the
One oil inlet, the first hydraulic fluid port, the second hydraulic fluid port, third hydraulic fluid port, the 4th hydraulic fluid port, the 5th hydraulic fluid port and the first oil outlet, extension and contraction control are changed
It is connect to valve with the delivery outlet of the first hydraulic oil pump by the first oil inlet, the first oil outlet and fuel tank of extension and contraction control reversal valve
Connection, the first hydraulic fluid port of extension and contraction control reversal valve are connected to the rod chamber of telescopic oil cylinder, the second hydraulic fluid port of extension and contraction control reversal valve
It is connected to the rodless cavity of telescopic oil cylinder, first flow recuperation valve includes the first import and first outlet, extension and contraction control reversal valve
First inlet communication of third hydraulic fluid port and first flow recuperation valve, the first outlet of first flow recuperation valve respectively with extension and contraction control
4th hydraulic fluid port of reversal valve and the connection of the 5th hydraulic fluid port；
Second hydraulic oil pump takes oil, the second hydraulic oil pump to be connect with elevator by rolling control reversal valve from fuel tank, rolling control
Reversal valve is raised electric proportional pilot valve by lift winch electricity proportional pilot valve and doffing respectively and is controlled, and rolling control reversal valve is equipped with the
Two oil inlets, the 6th hydraulic fluid port, the 7th hydraulic fluid port, the 8th hydraulic fluid port, the 9th hydraulic fluid port, the tenth hydraulic fluid port and the second oil outlet, rolling control change
It is connect to valve with the delivery outlet of the second hydraulic oil pump by the second oil inlet, the second oil outlet and fuel tank of rolling control reversal valve
Connection, the 6th hydraulic fluid port of rolling control reversal valve and the 7th hydraulic fluid port are connected to elevator respectively, and second flow recuperation valve includes second
Import and second outlet, the second inlet communication of the 8th hydraulic fluid port and second flow recuperation valve of rolling control reversal valve, second
The second outlet of amount recuperation valve is connected to the 9th hydraulic fluid port of rolling control reversal valve and the tenth hydraulic fluid port respectively；
Be connected to by converging valve between the delivery outlet of first hydraulic oil pump and the delivery outlet of the second hydraulic oil pump, converging valve by
The electric proportional pilot valve control in interflow.
3. dedicated control system according to claim 2, it is characterized in that：
The first overflow valve is equipped between the first oil inlet and the first oil outlet of the extension and contraction control reversal valve；
The second overflow valve is equipped between the second oil inlet and the second oil outlet of the rolling control reversal valve.
4. dedicated control system according to claim 2, it is characterized in that：
It is equipped between the rod chamber and rodless cavity of telescopic oil cylinder and the first hydraulic fluid port of extension and contraction control reversal valve and the second hydraulic fluid port flexible
Arm balanced valve.
5. dedicated control system according to claim 2, it is characterized in that：
Elevator balanced valve is equipped between elevator and the 6th hydraulic fluid port and the 7th hydraulic fluid port of rolling control reversal valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810277039.6A CN108298441A (en) | 2018-03-30 | 2018-03-30 | The control method and dedicated control system of crane stretch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810277039.6A CN108298441A (en) | 2018-03-30 | 2018-03-30 | The control method and dedicated control system of crane stretch |
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| CN108298441A true CN108298441A (en) | 2018-07-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111152838A (en) * | 2018-11-08 | 2020-05-15 | 扬州盛达特种车有限公司 | Hydraulic integrated control device for mine car steering system and box body lifting system |
| CN111410126A (en) * | 2020-04-17 | 2020-07-14 | 浙江三一装备有限公司 | Telescopic boom control system, telescopic boom and crane |
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| CN111152838A (en) * | 2018-11-08 | 2020-05-15 | 扬州盛达特种车有限公司 | Hydraulic integrated control device for mine car steering system and box body lifting system |
| CN111152838B (en) * | 2018-11-08 | 2023-08-15 | 潍柴(扬州)特种车有限公司 | Hydraulic integrated control device for mine car steering system and box lifting system |
| CN111410126A (en) * | 2020-04-17 | 2020-07-14 | 浙江三一装备有限公司 | Telescopic boom control system, telescopic boom and crane |
| CN111410126B (en) * | 2020-04-17 | 2022-05-03 | 浙江三一装备有限公司 | Telescopic boom control system, telescopic boom and crane |
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Application publication date: 20180720 |