CN109681493A - Leveling control loop and control method based on hydraulic control self-lock - Google Patents
Leveling control loop and control method based on hydraulic control self-lock Download PDFInfo
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- CN109681493A CN109681493A CN201811638908.XA CN201811638908A CN109681493A CN 109681493 A CN109681493 A CN 109681493A CN 201811638908 A CN201811638908 A CN 201811638908A CN 109681493 A CN109681493 A CN 109681493A
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- control
- oil circuit
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/26—Locking mechanisms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
Abstract
The invention discloses a kind of leveling control loop and control method based on hydraulic control self-lock, leveling control loop are applied to level hydraulic cylinder, and hydraulic cylinder includes rod chamber, rodless cavity and hydraulic cylinder rod；Leveling control loop includes self-locking leveling circuit and control loop；Self-locking leveling circuit includes hydraulic control self-lock valve block, the first execution oil circuit, the second execution oil circuit, third execution oil circuit and mechanical self-latching part；Hydraulic control self-lock valve block, the first execution oil circuit, mechanical self-latching part are sequentially connected, to limit the movement of hydraulic cylinder rod；Hydraulic control self-lock valve block, the second execution oil circuit, rodless cavity are sequentially connected, to control hydraulic cylinder rod stretching；Hydraulic control self-lock valve block, third execute oil circuit, rod chamber is sequentially connected, to control hydraulic cylinder rod retraction；Control loop is connected with hydraulic control self-lock valve block, executes movement of the oil circuit to hydraulic cylinder rod for controlling the first execution oil circuit, the second execution oil circuit, third.The present invention is achieved the purpose that the extension and contraction control to multiple hydraulic cylinders bar as driving force and is reached leveling using hydraulic.
Description
Technical field
The present invention relates to hydraulic regulating technical fields, and in particular to a kind of leveling control loop and control based on hydraulic control self-lock
Method processed.
Background technique
In actual production, there are many equipment for needing to go up and down or device using multi-dot hydraulic pressure lifting device, in order to guarantee
The equipment or device for needing to go up and down keep balance after lifting, also set up retaining mechanism；And current has mechanical self-latching function
Leveling system, mechanical self-latching function, which mainly passes through, individually controls mechanical structure or the special oil cylinder of design, and traditional passes through volume
It is outer to increase power source controller structure or the special oil cylinder of design or control the locking unlock to realize hydraulic cylinder by additional electric signal
Function；And on the market there are no there is the control of pure hydraulic circuit to the unlock of mechanical locking device and locking, therefore for should
Problem, it is also urgently to be resolved.
Summary of the invention
In view of the deficiencies in the prior art, the leveling control based on hydraulic control self-lock that the purpose of the present invention is to provide a kind of
Circuit processed and control method are reached using hydraulic as driving force using the stretching for oil pressure cntrol multiple hydraulic cylinders bar of hydraulic oil
To the purpose of leveling.
To achieve the above objectives, in a first aspect, the embodiment of the present invention provides a kind of leveling based on hydraulic control self-lock controls back
Road, the leveling control loop are applied to level hydraulic cylinder, and the hydraulic cylinder includes rod chamber, rodless cavity and hydraulic cylinder
Bar；The leveling control loop includes:
Self-locking leveling circuit comprising hydraulic control self-lock valve block, the first execution oil circuit, the second execution oil circuit, third execute oil
Road and mechanical self-latching part；
The hydraulic control self-lock valve block, the first execution oil circuit, mechanical self-latching part are sequentially connected, to limit the hydraulic cylinder rod
Movement；The hydraulic control self-lock valve block, the second execution oil circuit, rodless cavity are sequentially connected, and are stretched out with controlling the hydraulic cylinder rod；It is described
Hydraulic control self-lock valve block, third execute oil circuit, rod chamber is sequentially connected, and are retracted with controlling the hydraulic cylinder rod；
Control loop is connected with the hydraulic control self-lock valve block, for controlling the first execution oil circuit, described second holding
Row oil circuit, the third execute movement of the oil circuit to the hydraulic cylinder rod.
Based on the above technical solution, the hydraulic control self-lock valve block includes that a hydraulic control logical valve, two shuttle valves and one are flat
Weigh valve；
The hydraulic control logical valve has the first station and second station, and first station, the second station hinder respectively
Disconnected, conducting is connected to the control loop and described first and executes oil circuit；Oil inlet, the oil outlet, control of the hydraulic control logical valve
Mouth is connected with the outlet of the control loop, the first execution oil circuit, a shuttle valve respectively；
Two imports of one shuttle valve are connected with the outlet of another shuttle valve, the first execution oil circuit respectively, described another
Two imports of one shuttle valve are connected with the control loop；
The valve port of the balanced valve, pilot port are connected with the control loop, and load port and described second executes oil
Road is connected.
Based on the above technical solution, the hydraulic control logical valve, two shuttle valve, the balanced valve and described
One execution oil circuit, the second execution oil circuit, the third execute oil circuit and are integrated in one.
Based on the above technical solution, the control loop include high-pressure oil passage, multi-way valve and with the multichannel
The connected input pressure oil circuit of valve, the first control oil circuit, the second control oil circuit, return pressure oil circuit；
The high-pressure oil passage is connected with the oil inlet of the hydraulic control self-lock valve block, and the high-pressure oil passage is equipped with switching
Valve；
The input pressure oil circuit passes through one in multi-way valve and the first control oil circuit or the second control oil circuit
Oil circuit is connected, for providing the pressure oil of low pressure or middle pressure；
The return pressure oil circuit is controlled by multi-way valve with the first control oil circuit or described second another in oil circuit
One oil circuit is connected.
Based on the above technical solution, the hydraulic cylinder has at least two, and each hydraulic cylinder is arranged
There are a mechanical self-latching part and a self-locking leveling circuit；
All hydraulic cylinders are connected with the high-pressure oil passage, the input pressure oil circuit.
Second aspect, the embodiment of the present invention also provides a kind of leveling control method based on hydraulic control self-lock, based on above-mentioned
Level control loop；The leveling control method includes:
Control loop starts hydraulic control self-lock valve block, and control first executes oil circuit into low pressure oil or middle pressure oil, unlocking hydraulic pressure cylinder
Bar；Control second executes oil circuit into middle pressure oil, stretches out hydraulic cylinder rod；Control loop closes hydraulic control self-lock valve block, locked hydraulic cylinder
Bar；
Control loop is again started up hydraulic control self-lock valve block, and control first executes oil circuit into low pressure oil or middle pressure oil, unlocks liquid
Cylinder pressure bar；It controls third and executes oil circuit into middle pressure oil, retract hydraulic cylinder rod；Control loop closes hydraulic control self-lock valve block, locks liquid
Cylinder pressure bar.
Based on the above technical solution, the hydraulic control self-lock valve block includes that a hydraulic control logical valve, two shuttle valves and one are flat
Weigh valve；
The hydraulic control logical valve has the first station and second station, and first station, the second station hinder respectively
Disconnected, conducting is connected to the control loop and described first and executes oil circuit；Oil inlet, the oil outlet, control of the hydraulic control logical valve
Mouth is connected with the outlet of the control loop, the first execution oil circuit, a shuttle valve respectively；
Two imports of one shuttle valve are connected with the outlet of another shuttle valve, the first execution oil circuit respectively, described another
Two imports of one shuttle valve are connected with the control loop；
The valve port of the balanced valve, pilot port are connected with the control loop, and load port and described second executes oil
Road is connected.
Based on the above technical solution, the control second executes oil circuit into middle pressure oil, stretches out the tool of hydraulic cylinder rod
Body step includes:
The hydraulic control logical valve for keeping oil inlet to be connected with high-pressure oil passage is still open state；
Middle pressure pressure oil circuit is set by input pressure oil circuit, the middle pressure oil in control in pressure pressure oil circuit successively passes through institute
State the valve port of balanced valve, the balanced valve enters described second and executes in oil circuit, stretching hydraulic cylinder rod.
Based on the above technical solution, the control third executes oil circuit into middle pressure oil, retracts the tool of hydraulic cylinder rod
Body step includes:
The hydraulic control logical valve for keeping oil inlet to be connected with high-pressure oil passage is still open state；
Middle pressure pressure oil circuit is set by input pressure oil circuit, the middle pressure oil in control in pressure pressure oil circuit is directly entered
Three execute in oil circuit, retract hydraulic cylinder rod.
Based on the above technical solution, the control first executes oil circuit into low pressure oil or middle pressure oil, unlocking hydraulic pressure
The specific steps of cylinder rod include:
The oil inlet of hydraulic control logical valve is connected in high-pressure oil passage；
Low pressure oil circuit is set by input pressure oil circuit again, the high pressure oil in high-pressure oil passage is through the hydraulic control logical valve
Second station enter first execute oil circuit in, unlock mechanical self-latching part.Compared with the prior art, the advantages of the present invention are as follows:
The present invention provides a kind of leveling control loop and control method based on hydraulic control self-lock, utilizes the pressure of different pressures
Unlock and locking of the oil to the extension and contraction control of the hydraulic cylinder rod in hydraulic cylinder and for control mechanical self-latching part to hydraulic cylinder rod
Achieve the purpose that leveling, do not need using other power sources, and uses the hydraulic cylinder of normal tape mechanical self-latching part, nothing
Need special hydraulic cylinder, cost also relative moderate；Secondly, realize that the circuit of leveling control is integrated hydraulic control self-lock valve block,
Have both feature small in size and highly integrated；Operation of the present invention is convenient, saves space, reduces cost.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the leveling control loop based on hydraulic control self-lock in the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of hydraulic control self-lock valve block in the embodiment of the present invention；
In figure: 1- hydraulic cylinder, 11- rod chamber, 12- rodless cavity, 13- hydraulic cylinder rod, 2- mechanical self-latching part, 3- hydraulic control self-lock
Valve block, 31- hydraulic control logical valve, 32- shuttle valve, 33- balanced valve, 4- first execute oil circuit, and 5- second executes oil circuit, and 6- third executes
Oil circuit, 71- high-pressure oil passage, 710- switching valve, 72- input pressure oil circuit, 73- return pressure oil circuit, 81- first control oil circuit,
82- second controls oil circuit, 9- multi-way valve.
Specific embodiment
Clear, complete description is carried out below with reference to technical solution of the attached drawing to embodiment each in the present invention, it is clear that institute
The embodiment of description is only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiment of the present invention,
Those of ordinary skill in the art's obtained all other embodiment without making creative work belongs to this
Invent protected range.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.It should be pointed out that all attached drawings are illustrative expression.For the ordinary skill of this field
For personnel, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
The present invention is described in further detail below through specific implementation examples and in conjunction with the accompanying drawings.
Embodiment
Referring to shown in Fig. 1~2, the embodiment of the present invention provides a kind of leveling control loop based on hydraulic control self-lock, the tune
Flat control loop is applied to level hydraulic cylinder 1, and the hydraulic cylinder 1 includes rod chamber 11, rodless cavity 12 and hydraulic cylinder rod
13；The leveling control loop includes self-locking leveling circuit and control loop；The self-locking leveling circuit includes hydraulic control self-lock valve
Block 3, first executes oil circuit 4, second and executes oil circuit 5, third execution oil circuit 6 and mechanical self-latching part 2；The hydraulic control self-lock valve block
3, the first execution oil circuit 4, mechanical self-latching part 2 are sequentially connected, to limit the movement of the hydraulic cylinder rod 13；The hydraulic control self-lock valve
Block 3, second executes oil circuit 5, rodless cavity 12 is sequentially connected, and is stretched out with controlling the hydraulic cylinder rod 13；The hydraulic control self-lock valve block
3, third executes oil circuit 6, rod chamber 11 is sequentially connected, and is retracted with controlling the hydraulic cylinder rod 13；The control loop with it is described
Hydraulic control self-lock valve block 3 is connected, and executes oil for controlling the first execution oil circuit 4, the second execution oil circuit 5, the third
Movement of the road 6 to the hydraulic cylinder rod 13.
The present invention provides a kind of leveling control loop based on hydraulic control self-lock, using the pressure oil of different pressures to hydraulic cylinder
In hydraulic cylinder rod extension and contraction control and leveling reaches the unlock of hydraulic cylinder rod and locking for control mechanical self-latching part
Purpose, do not need using other power sources, and using the hydraulic cylinder of normal tape mechanical self-latching part, without special hydraulic
Cylinder, cost also relative moderate；Operation of the embodiment of the present invention is convenient, saves space, reduces cost.
In order to better understand the above technical scheme, being described in detail With reference to embodiment.
As a kind of preferred embodiment of the embodiment of the present invention, the hydraulic cylinder 1 has at least two, and each described hydraulic
Cylinder 1 is equipped with a mechanical self-latching part 2 and a self-locking leveling circuit；All hydraulic cylinders 1 with the high-pressure oil passage
71, the input pressure oil circuit 72 is connected.
In embodiments of the present invention, there are four the hydraulic cylinder 1 tools, be used for the stretching simultaneously of four hydraulic cylinder rods 13 or
It retracts.
Specifically, as shown in Fig. 2, the hydraulic control self-lock valve block 3 includes a hydraulic control logical valve 31, two shuttle valves 32 and a balance
Valve 33；The hydraulic control logical valve 31 has the first station and second station, and first station, the second station hinder respectively
The high-pressure oil passage and described first that disconnected, conducting is connected in the control loop execute oil circuit 4；The oil inlet of the hydraulic control logical valve 31
Mouth, oil outlet, control mouth respectively in the control loop high-pressure oil passage, it is described first execute oil circuit 4, a shuttle valve 32 go out
Mouth is connected；Two imports of one shuttle valve 32 are connected with the outlet of another shuttle valve 32, the first execution oil circuit 4 respectively, institute
Two imports for stating another shuttle valve 32 control 81 phase of oil circuit with the second control oil circuit 82, first in the control loop respectively
Even；The valve port of the balanced valve 33 is connected with the first control oil circuit 81, the pilot port of the balanced valve 33 and described second
It controls oil circuit 82 to be connected, and the second control oil circuit 82 also executes oil circuit 6 with the third and is connected, the balanced valve 33 is born
Mouth is carried to be connected with the second execution oil circuit 5.
Further, the hydraulic control logical valve 31, two shuttle valve 32, the balanced valve 33 and described first execute
Oil circuit 4, the second execution oil circuit 5, the third execute oil circuit 6 and are integrated in one；The integrated morphology realizes leveling control
Circuit is integrated hydraulic control self-lock valve block, also has both feature small in size and highly integrated.
Further, the control loop include high-pressure oil passage 71, multi-way valve 9 and be connected with the multi-way valve 9 into
Oil pressure oil circuit 72, first controls oil circuit 81, second and controls oil circuit 82, return pressure oil circuit 73；The high-pressure oil passage 71 and institute
The oil inlet for stating hydraulic control self-lock valve block 3 is connected, and the high-pressure oil passage 71 is equipped with switching valve 710；The input pressure oil circuit
72 are connected by multi-way valve 9 with an oil circuit in the first control oil circuit 81 or the second control oil circuit 82, for mentioning
For the pressure oil of low pressure or middle pressure；The return pressure oil circuit 73 controls oil circuit 81 or described by multi-way valve 9 and described first
Another oil circuit in second control oil circuit 82 is connected.
Wherein, the multi-way valve 9 have four, every respectively be connected in the hydraulic control self-lock valve block 3 first control
Oil circuit 81, second controls oil circuit 82 and is connected, and four and on input pressure oil circuit 72, return pressure oil circuit 73, therefore, described
Input pressure oil circuit 72 and return pressure oil circuit 73 are divided into four groups of oil circuits, i.e., four first control 81 Hes of oil circuit by multi-way valve 9
Four second control oil circuits 82.
The working principle of the embodiment of the present invention are as follows:
The control method that multiple hydraulic cylinders bar 13 is stretched out or retracted simultaneously, that is, level；So leveling terminates to need to retract
Hydraulic cylinder rod 13；And before hydraulic cylinder rod 13 stretches out or retracts, hydraulic cylinder rod 13 is unlocked；It is stretched in hydraulic cylinder rod 13
Out or after retraction, hydraulic cylinder rod 13 is locked.
Extending and retracting as a process using hydraulic cylinder rod 13 in the present embodiment.
Step 1: the oil inlet of hydraulic control logical valve 31 being connected with high-pressure oil passage 71, opens switching valve 710 for high-pressure oil passage
High pressure oil in 71 is sent to hydraulic control logical valve 31, at this point, hydraulic control logical valve, which is located at the first station, blocks the high-pressure oil passage 71
The conducting for executing oil circuit 4 with described first；Low pressure oil circuit is set by input pressure oil circuit 72 again, in low pressure oil circuit
Low pressure oil under the control of multi-way valve 9 enter first control oil circuit 81 or second control oil circuit 82 in, first control oil circuit 81
Or the second low pressure oil in control oil circuit 82 reaches the control mouth of the hydraulic control logical valve 31, the hydraulic control through two shuttle valve 32
Logical valve 31 it is electric, the hydraulic control logical valve 31 is in second station at this time, and therefore, the hydraulic control logical valve 31 is by high-pressure oil passage
High pressure oil in 71 is depressed into the first execution oil circuit 4, and control mechanical self-latching part 2 is unlocked hydraulic cylinder rod 13.
Step 2: after unlocking hydraulic pressure cylinder rod 13, the hydraulic control logical valve 31 for keeping oil inlet to be connected with high-pressure oil passage 71 is still
For open state；Middle pressure pressure oil circuit is set by input pressure oil circuit 72, the middle pressure oil in control in pressure pressure oil circuit enters
First control oil circuit 81, then successively enter described second by the valve port of the balanced valve 33, the balanced valve 33 and execute oil circuit 5
In, into the stretching for controlling hydraulic cylinder rod 13 in the rodless cavity 12 of the hydraulic cylinder 1, and the pressure in the rod chamber 11
It is oily then execute oil circuit 6 through the third and flow back from the second control oil circuit 82 through the return pressure oil circuit 73.
Step 3: the switching valve 710 in high-pressure oil passage 71 is closed, and 3 power loss of hydraulic control self-lock valve block is in the first station, described
High pressure oil is no longer flow into first execution oil circuit 4, control mechanical self-latching part 2 locks hydraulic cylinder rod 13.
Step 4: the oil inlet of hydraulic control logical valve 31 being connected with high-pressure oil passage 71, opens switching valve 710 for high-pressure oil passage
High pressure oil in 71 is sent to hydraulic control logical valve 31, at this point, hydraulic control logical valve, which is located at the first station, blocks the high-pressure oil passage 71
The conducting for executing oil circuit 4 with described first；Low pressure oil circuit is set by input pressure oil circuit 72 again, in low pressure oil circuit
Low pressure oil under the control of multi-way valve 9 enter first control oil circuit 81 or second control oil circuit 82 in, first control oil circuit 81
Or the second low pressure oil in control oil circuit 82 reaches the control mouth of the hydraulic control logical valve 31, the hydraulic control through two shuttle valve 32
Logical valve 31 it is electric, the hydraulic control logical valve 31 is in second station at this time, and therefore, the hydraulic control logical valve 31 is by high-pressure oil passage
High pressure oil in 71 is depressed into the first execution oil circuit 4, and control mechanical self-latching part 2 is unlocked hydraulic cylinder rod 13.
Step 5: after unlocking hydraulic pressure cylinder rod 13, the hydraulic control logical valve 31 for keeping oil inlet to be connected with high-pressure oil passage 71 is still
Open state；Middle pressure pressure oil circuit is set by input pressure oil circuit 72, the middle pressure oil in control in pressure pressure oil circuit enters institute
The second control oil circuit 82 is stated, third is entered back into and executes in oil circuit 6, finally flowing into has bar with what third execution oil circuit 6 was connected
It is retracted in chamber 11 and by the hydraulic cylinder rod 13, and the pressure oil in the rodless cavity 12 is then back to through the balanced valve 33
One control oil circuit 81, flows out using return pressure oil circuit 73.
Step 6: the switching valve 710 in high-pressure oil passage 71 is closed, and 3 power loss of hydraulic control self-lock valve block is in the first station, described
High pressure oil is no longer flow into first execution oil circuit 4, control mechanical self-latching part 2 locks hydraulic cylinder rod 13.
The embodiment of the present invention also provides a kind of leveling control method based on hydraulic control self-lock, is controlled back based on above-mentioned leveling
Road；The leveling control method includes:
Control loop starts hydraulic control self-lock valve block 3, and control first executes oil circuit 4 into low pressure oil or middle pressure oil, unlocking hydraulic pressure
Cylinder rod 13；Control second executes oil circuit 5 into middle pressure oil, stretches out hydraulic cylinder rod 13；Control loop closes hydraulic control self-lock valve block 3, lock
Tight hydraulic cylinder rod 13；
Control loop is again started up hydraulic control self-lock valve block 3, and control first executes oil circuit 4 into low pressure oil or middle pressure oil, unlock
Hydraulic cylinder rod 13；It controls third and executes oil circuit 6 into middle pressure oil, retract hydraulic cylinder rod 13；Control loop closes hydraulic control self-lock valve block
3, locked hydraulic cylinder bar 13.
Using the pressure oil of different pressures to the extension and contraction control of hydraulic cylinder rod and for controlling machine in the embodiment of the present invention
Tool self-locking body achievees the purpose that leveling to the unlock of hydraulic cylinder rod and locking, does not need using other power sources.
The control first executes oil circuit 4 into low pressure oil or middle pressure oil, and the specific steps of unlocking hydraulic pressure cylinder rod 13 include:
The oil inlet of hydraulic control logical valve 31 is connected with high-pressure oil passage 71, opening switching valve 710 will be in high-pressure oil passage 71
High pressure oil is sent to hydraulic control logical valve 31, at this point, hydraulic control logical valve be located at the first station block the high-pressure oil passage 71 with it is described
First executes the conducting of oil circuit 4；Low pressure oil circuit is set by input pressure oil circuit 72 again, the low pressure in low pressure oil circuit
Oil enters under the control of multi-way valve 9 in first control oil circuit 81 or the second control oil circuit 82, the first control oil circuit 81 or the second
Low pressure oil in control oil circuit 82 reaches the control mouth of the hydraulic control logical valve 31, the hydraulic control logical valve through two shuttle valve 32
31 must be electric, and the hydraulic control logical valve 31 is in second station at this time, and therefore, the hydraulic control logical valve 31 will be in high-pressure oil passage 71
High pressure oil is depressed into the first execution oil circuit 4, and control mechanical self-latching part 2 is unlocked hydraulic cylinder rod 13.
The control loop closes hydraulic control self-lock valve block 3, and the specific steps of locked hydraulic cylinder bar 13 include:
Switching valve 710 in high-pressure oil passage 71 is closed, and 3 power loss of hydraulic control self-lock valve block is in the first station, and described first holds
High pressure oil is no longer flow into row oil circuit 4, control mechanical self-latching part 2 locks hydraulic cylinder rod 13.
The control second executes oil circuit 5 into middle pressure oil, and the specific steps for stretching out hydraulic cylinder rod 13 include:
After unlocking hydraulic pressure cylinder rod 13, the hydraulic control logical valve 31 for keeping oil inlet to be connected with high-pressure oil passage 71 is still unlatching
State；Middle pressure pressure oil circuit is set by input pressure oil circuit 72, the middle pressure oil in control in pressure pressure oil circuit enters the first control
Liquefaction road 81, then successively enter described second by the valve port of the balanced valve 33, the balanced valve 33 and execute in oil circuit 5, into
Enter to control the stretching of hydraulic cylinder rod 13 in the rodless cavity 12 of the hydraulic cylinder 1, and the pressure oil in the rod chamber 11 is then
Oil circuit 6 is executed through the third to flow back from the second control oil circuit 82 through the return pressure oil circuit 73.
The control third executes oil circuit 6 into middle pressure oil, and the specific steps for retracting hydraulic cylinder rod 13 include:
After unlocking hydraulic pressure cylinder rod 13, the hydraulic control logical valve 31 for keeping oil inlet to be connected with high-pressure oil passage 71 is still unlatching
State；Middle pressure pressure oil circuit is set by input pressure oil circuit 72, the middle pressure oil in control in pressure pressure oil circuit enters described the
Two control oil circuits 82, enter back into third and execute in oil circuit 6, finally flow into and execute the rod chamber 11 that oil circuit 6 is connected with the third
In and the hydraulic cylinder rod 13 retracted, and the pressure oil in the rodless cavity 12 is then back to the first control through the balanced valve 33
Liquefaction road 81 is flowed out using return pressure oil circuit 73.
The embodiment of the present invention provides a kind of leveling control loop and control method based on hydraulic control self-lock, it is only necessary to pressure oil
There is provided driving force, and by the way of controlling pressure oil can to hydraulic cylinder rod extension and contraction control, meanwhile, be also applied for multiple liquid
The leveling of cylinder pressure bar, it is only necessary to the quantity of the piece number of multi-way valve and hydraulic cylinder match, operation of the embodiment of the present invention is convenient, saves
Space reduces cost.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
Under the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications are also considered as protection of the invention
Within the scope of.The content being not described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (10)
1. a kind of leveling control loop based on hydraulic control self-lock, which is characterized in that the leveling control loop is applied to hydraulic
Cylinder (1) is leveled, and the hydraulic cylinder (1) includes rod chamber (11), rodless cavity (12) and hydraulic cylinder rod (13)；The leveling control
Circuit processed includes:
Self-locking leveling circuit comprising hydraulic control self-lock valve block (3), the first execution oil circuit (4), the second execution oil circuit (5), third are held
Row oil circuit (6) and mechanical self-latching part (2)；
The hydraulic control self-lock valve block (3), the first execution oil circuit (4), mechanical self-latching part (2) are sequentially connected, described hydraulic to limit
The movement of cylinder rod (13)；The hydraulic control self-lock valve block (3), the second execution oil circuit (5), rodless cavity (12) are sequentially connected, with control
The hydraulic cylinder rod (13) is stretched out；The hydraulic control self-lock valve block (3), third execute oil circuit (6), rod chamber (11) is sequentially connected,
To control the hydraulic cylinder rod (13) retraction；
Control loop is connected with the hydraulic control self-lock valve block (3), executes oil circuit (4), described second for controlling described first
Execute oil circuit (5), the third executes the movement of oil circuit (6) to the hydraulic cylinder rod (13).
2. the leveling control loop according to claim 1 based on hydraulic control self-lock, which is characterized in that the hydraulic control self-lock valve
Block (3) includes a hydraulic control logical valve (31), two shuttle valves (32) and a balanced valve (33)；
The hydraulic control logical valve (31) has the first station and second station, and first station, the second station hinder respectively
Disconnected, conducting is connected to the control loop and described first and executes oil circuit (4)；It is the oil inlet of the hydraulic control logical valve (31), fuel-displaced
Mouth, control mouth are connected with the outlet of the control loop, first execution oil circuit (4), a shuttle valve (32) respectively；
Two imports of one shuttle valve (32) execute oil circuit (4) with the outlet of another shuttle valve (32), described first respectively and are connected,
Two imports of another shuttle valve (32) are connected with the control loop；
The valve port of the balanced valve (33), pilot port are connected with the control loop, and load port and described second executes oil
Road (5) is connected.
3. the leveling control loop according to claim 2 based on hydraulic control self-lock, which is characterized in that the hydraulic control logical valve
(31), two shuttle valve (32), the balanced valve (33) and described first execute oil circuit (4), the second execution oil circuit
(5), the third executes oil circuit (6) and is integrated in one.
4. the leveling control loop according to claim 1 based on hydraulic control self-lock, which is characterized in that the control loop packet
Include high-pressure oil passage (71), multi-way valve (9) and the input pressure oil circuit (72) being connected with the multi-way valve (9), the first control oil
Road (81), the second control oil circuit (82), return pressure oil circuit (73)；
The high-pressure oil passage (71) is connected with the oil inlet of the hydraulic control self-lock valve block (3), and sets on the high-pressure oil passage (71)
There are switching valve (710)；
The input pressure oil circuit (72) passes through multi-way valve (9) and first control oil circuit (81) or the second control oil circuit
(82) oil circuit in is connected, for providing the pressure oil of low pressure or middle pressure；
The return pressure oil circuit (73) passes through multi-way valve (9) and first control oil circuit (81) or the second control oil circuit
(82) another oil circuit in is connected.
5. the leveling control loop according to claim 4 based on hydraulic control self-lock, which is characterized in that the hydraulic cylinder (1)
With at least two, and each hydraulic cylinder (1) is equipped with a mechanical self-latching part (2) and a self-locking leveling circuit；
All hydraulic cylinders (1) are connected with the high-pressure oil passage (71), the input pressure oil circuit (72).
6. a kind of leveling control method based on hydraulic control self-lock is based on leveling control loop described in claim 1；Its feature exists
In the leveling control method includes:
Control loop starts hydraulic control self-lock valve block (3), and control first executes oil circuit (4) into low pressure oil or middle pressure oil, unlocking hydraulic pressure
Cylinder rod (13)；Control second executes oil circuit (5) into middle pressure oil, stretches out hydraulic cylinder rod (13)；Control loop closes hydraulic control self-lock valve
Block (3), locked hydraulic cylinder bar (13)；
Control loop is again started up hydraulic control self-lock valve block (3), and control first executes oil circuit (4) into low pressure oil or middle pressure oil, unlock
Hydraulic cylinder rod (13)；It controls third and executes oil circuit (6) into middle pressure oil, retract hydraulic cylinder rod (13)；Control loop closes hydraulic control certainly
Locking-valve block (3), locked hydraulic cylinder bar (13).
7. leveling control method according to claim 6, which is characterized in that the hydraulic control self-lock valve block (3) includes a liquid
Control logical valve (31), two shuttle valves (32) and a balanced valve (33)；
The hydraulic control logical valve (31) has the first station and second station, and first station, the second station hinder respectively
Disconnected, conducting is connected to the control loop and described first and executes oil circuit (4)；It is the oil inlet of the hydraulic control logical valve (31), fuel-displaced
Mouth, control mouth are connected with the outlet of the control loop, first execution oil circuit (4), a shuttle valve (32) respectively；
Two imports of one shuttle valve (32) execute oil circuit (4) with the outlet of another shuttle valve (32), described first respectively and are connected,
Two imports of another shuttle valve (32) are connected with the control loop；
The valve port of the balanced valve (33), pilot port are connected with the control loop, and load port and described second executes oil
Road (5) is connected.
8. leveling control method according to claim 7, which is characterized in that the control second executes oil circuit (5) in
Pressure oil, the specific steps for stretching out hydraulic cylinder rod (13) include:
The hydraulic control logical valve (31) for keeping oil inlet to be connected with high-pressure oil passage (71) is open state；
Middle pressure pressure oil circuit is set by input pressure oil circuit (72), the middle pressure oil in control in pressure pressure oil circuit successively passes through institute
State the valve port of balanced valve (33), the balanced valve (33) enters described second and executes in oil circuit (5), stretching hydraulic cylinder rod (13).
9. leveling control method according to claim 7, which is characterized in that the control third executes oil circuit (6) in
Pressure oil, the specific steps for retracting hydraulic cylinder rod (13) include:
The hydraulic control logical valve (31) for keeping oil inlet to be connected with high-pressure oil passage (71) is open state；
Middle pressure pressure oil circuit is set by input pressure oil circuit (72), the middle pressure oil in control in pressure pressure oil circuit is directly entered
Three execute in oil circuit (6), retract hydraulic cylinder rod (13).
10. leveling control method according to claim 7, which is characterized in that the control first executes oil circuit (4) into low
The specific steps of pressure oil or middle pressure oil, unlocking hydraulic pressure cylinder rod (13) include:
The oil inlet of hydraulic control logical valve (31) is connected in high-pressure oil passage (71)；
Low pressure oil circuit is set by input pressure oil circuit (72) again, the high pressure oil in high-pressure oil passage (71) is patrolled through the hydraulic control
The second station for collecting valve (31) enters first and executes in oil circuit (4), unlocks mechanical self-latching part (2).
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| CN201811638908.XA CN109681493B (en) | 2018-12-29 | 2018-12-29 | Leveling control loop based on hydraulic control self-locking and control method |
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| CN201811638908.XA CN109681493B (en) | 2018-12-29 | 2018-12-29 | Leveling control loop based on hydraulic control self-locking and control method |
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