CN105545853B - Extension and contraction control valve, multi-stage expansion hydraulic system and arm of derrick stretch hydraulic control system - Google Patents
Extension and contraction control valve, multi-stage expansion hydraulic system and arm of derrick stretch hydraulic control system Download PDFInfo
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- CN105545853B CN105545853B CN201511024320.1A CN201511024320A CN105545853B CN 105545853 B CN105545853 B CN 105545853B CN 201511024320 A CN201511024320 A CN 201511024320A CN 105545853 B CN105545853 B CN 105545853B
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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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- 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
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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
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type
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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
- F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
- F15B2013/004—Cartridge valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Actuator (AREA)
Abstract
Stretch hydraulic control system the present invention relates to a kind of extension and contraction control valve, multi-stage expansion hydraulic system and arm of derrick, wherein extension and contraction control valve includes valve body, valve body is equipped with the first hydraulic fluid port and at least two second hydraulic fluid ports, first hydraulic fluid port is connected with logical oily oil circuit between at least two second hydraulic fluid ports respectively, each bar, which leads to, is respectively equipped with on-off valve on oil circuit, the control port of each on-off valve is connected by reversal valve with control oil sources respectively, selection to each on-off valve can be realized by the commutation of reversal valve, and then realization is to leading to the conducting of oily oil circuit or blocking.The present invention can be realized to the different conductings for leading to oily oil circuits or blocked by setting the first hydraulic fluid port, the second hydraulic fluid port, reversal valve and on-off valve, by the commutation of reversal valve.For multi-stage expansion hydraulic cylinder, the cylinder rod corresponding to selected oil circuit can control to stretch out or retract, and other oil circuits do not interfere with the action of the cylinder rod, realize the independent control to every grade of cylinder barrel due to being truncated.
Description
Technical field
The present invention relates to technical field of engineering machinery, more particularly to a kind of extension and contraction control valve, multi-stage expansion hydraulic system and
Arm of derrick stretches hydraulic control system.
Background technology
Multistage hydraulic cylinder is generally possible to realize more than two level or two level flexible, and telescopic sleeve hydraulic pressure is commonly referred to as in industry
Cylinder, is broadly divided into single-acting formula and double-acting type.The oil inlet and outlet of single-acting formula multistage hydraulic cylinder is same, by pressing during stretching
Power stretches out cylinder barrels at different levels order, and when retraction is realized by gravity or other external force, such as Self dumping truck lift oil cylinder.Double-action hydraulic
The size chamber of cylinder has hydraulic fluid port control, and internal galleries are complex, if hydraulic fluid port Position Design is improper in design, easily scratches
Sealing ring, reduces hydraulic cylinder life.Existing multistage hydraulic cylinder can realize synchronization or sequentially-operating, in order to meet complex mechanism
Requirement, its internal structure also more and more finely with complexity.
As shown in Figure 1, for the structure diagram of twin-tub telescopic hydraulic system in the prior art, which adds rope using twin-tub
Arrange telescoping mechanism：First hydraulic cylinder a2 and second hydraulic cylinder a3 share an oil sources, and two liquid are controlled by extension and contraction control valve a1
The movement of cylinder pressure.Wherein the big chamber of first hydraulic cylinder a2 by the central core pipe of second hydraulic cylinder a3 come fuel feeding, first hydraulic cylinder
The small chamber of a2 is connected with the small chamber of second hydraulic cylinder a3.
The telescopic control system of this structure has the disadvantages that：
1st, double hydraulic cylinder weight is larger, arm carries out operation under the long-armed above operating mode when, to arm and hydraulic cylinder
Stress produces certain influence；
2nd, arrangement double hydraulic cylinder in arm, occupied space is big, makes complete machine not compact enough, influences arm section, and to rope
Mechanism has certain limitations；
3rd, extension and contraction control valve is more complicated；
4th, the cost of double hydraulic cylinder and extension and contraction control valve is higher.
As shown in Fig. 2, there are a kind of multistage sequential telescopic hydraulic cylinder, the multistage sequential telescopic hydraulic cylinder bag in the prior art
Extension and contraction control valve b1 and two-stage extension and contraction control oil cylinder are included, the first oil circuit b2 and the second oil circuit are internally provided with middle level-one cylinder barrel
B4, the first oil circuit b2 connect the rod chamber of oil inlet and final stage telescopic oil cylinder, are provided with sequence valve b3 on the second oil circuit b4, in addition
Check valve b5 is additionally provided with middle level-one cylinder barrel, the sequential telescopic of hydraulic cylinder is realized by sequence valve b3 and check valve b5.
The drawback is that：
1st, maintenance difficult：When sequence valve b3 and check valve b5 breaks down and (adjusts or leak if desired for pressure)
When, maintenance can be extremely difficult, it is necessary to which the arm for vehicle of dismantling, then decomposes hydraulic cylinder, could repair；
2nd, sequence valve pressure sets the hidden danger brought：In setting order pressure, it is necessary to accurately calculate outermost level cylinder
Cylinder stretches out required pressure, and pressure value sets too low sequentially-operating to upset, and outermost level cylinder barrel is possible to move in middle cylinder barrel
As when be servo-actuated；Pressure value setting is excessive, impact is also easy to produce when opening sequence valve, and larger pressure can be caused on sequence valve
Loss；
3rd, the limitation that sequentially-operating is brought：By taking five joint arm cranes as an example, when the configuration multistage hydraulic cylinder and rope machine
During structure, middle cylinder barrel drives two joint arms, and final stage cylinder barrel promotes three, four, five joint arms of rope mechanism controls.Using as shown in Figure 2
Organization plan when, can only first stretch two joint arms, then stretch three, four, five joint arms again.When client is not required full semi-girder to grow, and only need
3rd, when four, five joint arm brachiums meet applying working condition, it is necessary to three, four, five joint arms are individually stretched in the case of two joint arms are not stretched, and
Due to the limitation of the multistage sequential telescopic hydraulic cylinder sequentially-operating, it can not meet above-mentioned requirements.
To sum up, Synchronized Telescopic Cylinder and multistage sequential telescopic hydraulic cylinder have certain limitation.It is multistage synchronous
Telescopic hydraulic cylinder can only realize synchronization telescope, and can not achieve the action respectively of hydraulic cylinder；Multistage sequential telescopic hydraulic cylinder can only
According to specified sequential telescopic, the order of hydraulic cylinder is fixed, and can not be realized and arbitrarily be controlled the flexible of every grade of cylinder barrel, therefore this is just
Limit the performance requirement of crane telescopic mechanism.
The content of the invention
Stretch hydraulic control system the purpose of the present invention is to propose to a kind of extension and contraction control valve, multi-stage expansion hydraulic system and arm of derrick
System, to realize the independent control to every grade of cylinder barrel in multi-stage expansion hydraulic cylinder.
To achieve the above object, the present invention provides a kind of extension and contraction control valve, including valve body, the valve body to be equipped with first
Hydraulic fluid port and at least two second hydraulic fluid ports, first hydraulic fluid port are connected with logical oil oil between at least two second hydraulic fluid port respectively
Road, is respectively equipped with on-off valve, the control port of each on-off valve passes through the commutation respectively described in each bar on logical oily oil circuit
Valve is connected with control oil sources, can realize the selection to each on-off valve by the commutation of the reversal valve, and then realize
Conducting to the logical oily oil circuit is blocked.
Further, the on-off valve is inserted valve.
Further, the control oil sources comes from first hydraulic fluid port and at least two second hydraulic fluid port pressure most
Big hydraulic fluid port.
Further, shuttle valve network is further included, the shuttle valve network is used to choose first hydraulic fluid port and described at least two
Maximum pressure in a second hydraulic fluid port, and the control port of the selected on-off valve is fed back to by the reversal valve, with
The selected on-off valve is closed, and opens the non-selected on-off valve.
Further, the 3rd hydraulic fluid port and the 4th hydraulic fluid port, the 3rd hydraulic fluid port and the 4th oil are additionally provided with the valve body
Mouth connection, to be used as oil inlet passage or drainback passage.
To achieve the above object, present invention also offers a kind of multi-stage expansion hydraulic system, including at least two-stage hydraulic cylinder
With above-mentioned extension and contraction control valve, at least two second hydraulic fluid port on the extension and contraction control valve respectively with least two-stage liquid
Each rodless cavity connection of cylinder pressure, is additionally provided with the 3rd hydraulic fluid port and the 4th hydraulic fluid port on the valve body, the 3rd hydraulic fluid port and described the
Four hydraulic fluid ports connect, to be equipped with and at least two-stage as oil inlet passage or drainback passage, at least two-stage hydraulic cylinder
The internal galleries of each rod chamber connection of hydraulic cylinder, the 3rd hydraulic fluid port are connected with the internal galleries, the extension and contraction control
Valve realizes that each cylinder rod stretching at least two-stage hydraulic cylinder or the independence retracted are controlled by the commutation of the reversal valve
System.
Further, it is outer between each rodless cavity of at least two second hydraulic fluid port and at least two-stage hydraulic cylinder
Portion's connection oil circuit is equipped with balanced valve.
Further, the control chamber of each balanced valve is all connected to the company of the 3rd hydraulic fluid port and the internal galleries
Connect on oil circuit.
Further, at least two-stage hydraulic cylinder includes center piston bar, first order cylinder barrel, second level cylinder barrel and center
Core pipe, wherein piston rod of the center piston bar as first order telescopic hydraulic cylinder, the second level cylinder barrel is set in described
The outside of first order cylinder barrel, so that the first order cylinder barrel can be as the piston rod of second level telescopic hydraulic cylinder, in described
The be indecisive and changeable end of stopper rod is equipped with the 5th hydraulic fluid port, the 6th hydraulic fluid port and the 7th hydraulic fluid port, and the 5th hydraulic fluid port and the first order are stretched liquid
The rodless cavity of cylinder pressure is connected by the first internal galleries for being arranged on the center piston bar, the 6th hydraulic fluid port and described the
The rodless cavity of two level telescopic hydraulic cylinder is connected by the central core pipe, the 7th hydraulic fluid port and the first order telescopic hydraulic cylinder
Rod chamber connected by the second internal galleries for being arranged on the center piston bar, the first order telescopic hydraulic cylinder has
Rod cavity and the rod chamber of the second level telescopic hydraulic cylinder are connected by the 3rd internal galleries being arranged on the first order cylinder barrel
It is logical.
To achieve the above object, stretch hydraulic control system present invention also offers a kind of arm of derrick, including arm and above-mentioned
Multi-stage expansion hydraulic system, the multi-stage expansion hydraulic system are used for the stretching or retraction for controlling the arm.
Based on above-mentioned technical proposal, the present invention on the valve body of extension and contraction control valve by setting the first hydraulic fluid port and at least two
Second hydraulic fluid port, the logical oily oil circuit that the first hydraulic fluid port is connected with the second hydraulic fluid port are equipped with on-off valve, can be real by the commutation of reversal valve
Now to the selection of different on-off valves, and then realize to the different conductings for leading to oily oil circuits or block.The extension and contraction control valve is applied to
During multi-stage expansion hydraulic system, you can realize the control to different oil circuits.It is flexible by this for multi-stage expansion hydraulic cylinder
Control valve selects an oil circuit conducting, other non-selected oil circuits are truncated, corresponding to so controllable selected oil circuit
Cylinder rod stretch out or retract, and other oil circuits do not interfere with the action of the cylinder rod, realize to every grade of cylinder due to being truncated
The independent control of cylinder.
Brief description of the drawings
Attached drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structure diagram of twin-tub telescopic hydraulic system in the prior art.
Fig. 2 is the structure diagram of multistage sequential telescopic hydraulic cylinder in the prior art.
Fig. 3 is the structure diagram of extension and contraction control valve one embodiment of the present invention.
Fig. 4 is the structure diagram of multi-stage expansion hydraulic system one embodiment of the present invention.
In figure：A1- extension and contraction control valves, a2- first hydraulic cylinders, a3- second hydraulic cylinders, the first balanced valves of a4-, a5- second
Balanced valve；B1- extension and contraction control valves, the first oil circuits of b2-, b3- sequence valves, the second oil circuits of b4-, b5- check valves；
1- center piston bars, 2- first order cylinder barrels, 3- second level cylinder barrel, the first inserted valves of F1-, the second inserted valves of F2-,
The first shuttle valves of F3-, the second shuttle valves of F4-, Y1- reversal valves, the first balanced valves of P1-, the second balanced valves of P2-, the first hydraulic fluid ports of A-, A1,
The second hydraulic fluid ports of C1-, the 3rd hydraulic fluid ports of B1-, the 4th hydraulic fluid ports of B-, the 5th hydraulic fluid ports of A2-, the 6th hydraulic fluid ports of C2-, the 7th hydraulic fluid ports of B2-, A3, B3,
B4, B5, C3- hydraulic fluid port, S0- centers core pipe chamber, the rodless cavity of S1- first order telescopic hydraulic cylinders, S2- first order telescopic hydraulic cylinders
Rod chamber, the rodless cavity of S3- second level telescopic hydraulic cylinder, the rod chamber of S4- second level telescopic hydraulic cylinder.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in embodiment is clearly and completely retouched
State.Obviously, described embodiment is only the part of the embodiment of the present invention, instead of all the embodiments.Based on this hair
Bright embodiment, the every other implementation that those of ordinary skill in the art are obtained without making creative work
Example, belongs to the scope of protection of the invention.
In the description of the present invention, it is to be understood that term " " center ", " transverse direction ", " longitudinal direction ", "front", "rear",
The orientation or position relationship of the instruction such as "left", "right", " on ", " under ", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than instruction or dark
Show that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, thus it is it is not intended that right
The limitation of the scope of the present invention.
As shown in figure 3, being the structure diagram of extension and contraction control valve one embodiment of the present invention, which includes valve
Body, the valve body are equipped with the first hydraulic fluid port A and at least two second hydraulic fluid port A1, C1, the first hydraulic fluid port A respectively with it is described at least
Logical oily oil circuit is connected between two second hydraulic fluid ports A1, C1, leads to described in each bar on oily oil circuit and is respectively equipped with on-off valve, it is each described
The control port of on-off valve is connected by the reversal valve Y1 with control oil sources respectively, can by the commutation of the reversal valve Y1
Realize selection to each on-off valve, and then realize conducting to the logical oily oil circuit or block.
By setting the first hydraulic fluid port and at least two second hydraulic fluid ports, the first hydraulic fluid port and second on the valve body of extension and contraction control valve
The logical oily oil circuit of hydraulic fluid port connection is equipped with on-off valve, and the selection to different on-off valves can be realized by the commutation of reversal valve, into
And realize to the different conductings for leading to oily oil circuits or block.When the extension and contraction control valve is applied to multi-stage expansion hydraulic system, you can
Realize the control to different oil circuits.For multi-stage expansion hydraulic cylinder, an oil circuit is selected to turn on by the extension and contraction control valve,
Other non-selected oil circuits are truncated, and the cylinder rod corresponding to so controllable selected oil circuit is stretched out or retracted, and other
Oil circuit does not interfere with the action of the cylinder rod, realizes the independent control to every grade of cylinder barrel due to being truncated.
Wherein, on-off valve can select any switch valve with control chamber, such as overflow valve etc..In one embodiment
In, the on-off valve is inserted valve, can realize the control to greater flow or bigger pressure fluid pressure oil.
It is maximum that the control oil sources comes from pressure in the first hydraulic fluid port A and described at least two second hydraulic fluid port A1, C1
Hydraulic fluid port.Extension and contraction control valve can also include shuttle valve network, the shuttle valve network be used to choosing the first hydraulic fluid port A and it is described extremely
Maximum pressure in few two second hydraulic fluid ports A1, C1, and the selected on-off valve is fed back to by the reversal valve Y1
Control port, so that the selected on-off valve is closed, and opens the non-selected on-off valve.
Further, the 3rd hydraulic fluid port B1 and the 4th hydraulic fluid port B, the 3rd hydraulic fluid port B1 and described are additionally provided with the valve body
Four hydraulic fluid port B are connected, to be used as oil inlet passage or drainback passage.
As shown in figure 3, the extension and contraction control valve be equipped with the first hydraulic fluid port A, two the second hydraulic fluid port A1 and C1, the 3rd hydraulic fluid port B1 and
4th hydraulic fluid port B, valve body is interior to be equipped with reversal valve Y1, the first inserted valve F1, the second inserted valve F2, the first shuttle valve F3 and the second shuttle valve
F4, wherein reversal valve Y1 are two-position four-way solenoid directional control valve, and the oil inlet of the first inserted valve F1 is connected with the first hydraulic fluid port A, first
The oil outlet of inserted valve F1 is connected with the second hydraulic fluid port A1, the control port of the second inserted valve F2 and a working oil of reversal valve Y1
Mouth connection；The oil inlet of first inserted valve F1 is connected with the first hydraulic fluid port A, and the oil outlet of the second inserted valve F2 and the second hydraulic fluid port C1 connect
Connect, the control port of the second inserted valve F2 is connected with another actuator port of reversal valve Y1.
The oil inlet at the second shuttle valve F4 both ends is connected with the second hydraulic fluid port A1 and the second hydraulic fluid port C1 respectively, and the second shuttle valve F4's goes out
Hydraulic fluid port is connected with one end oil inlet of the first shuttle valve F3, and the other end oil inlet of the first shuttle valve F3 is connected with the first hydraulic fluid port A, and first
The oil outlet of shuttle valve F3 is connected with an oil inlet of reversal valve Y1, another oil inlet connection fuel tank of reversal valve Y1.
When reversal valve Y1 must not be electric, the next work of reversal valve Y1, the maximum that the first shuttle valve F3 and the second shuttle valve F4 choose
Pressure is applied to the control port of the second inserted valve F2 by reversal valve Y1, closes the second inserted valve F2, and the first inserted valve
The control port of F1 is connected by reversal valve Y1 with fuel tank, and the first inserted valve F1 is in open mode, thus by the first hydraulic fluid port A into
The hydraulic oil for entering extension and contraction control valve flows to the second hydraulic fluid port A1 by the first inserted valve F1.
When reversal valve Y1 obtains electric, the upper work of reversal valve Y1, the maximum pressure that the first shuttle valve F3 and the second shuttle valve F4 choose
Power is applied to the control port of the first inserted valve F1 by reversal valve Y1, closes the first inserted valve F1, and the second inserted valve F2
Control port connected by reversal valve Y1 with fuel tank, the second inserted valve F2 is in open mode, therefore is entered by the first hydraulic fluid port A
The hydraulic oil of extension and contraction control valve flows to the second hydraulic fluid port C1 by the second inserted valve F2.
That is, when hydraulic oil enters extension and contraction control valve from the first hydraulic fluid port A, by the dead electricity of reversal valve Y1 with it is electric, can be with
Hydraulic oil is flowed on the oil circuit being connected with the second hydraulic fluid port A1, or flow on the oil circuit being connected with the second hydraulic fluid port C1, such as with
The oil circuit of second hydraulic fluid port A1 connections corresponds to the rodless cavity of the first order cylinder barrel in multi-stage expansion hydraulic cylinder, you can realizes first order liquid
The stretching of cylinder pressure；The rodless cavity of second level cylinder barrel in multi-stage expansion hydraulic cylinder corresponding with the oil circuit of the second hydraulic fluid port C1 connections, i.e.,
The stretching of second level hydraulic cylinder can be achieved.
In addition, when hydraulic oil enters extension and contraction control valve from the 4th hydraulic fluid port B, it is electric with obtaining by the dead electricity of reversal valve Y1, can
So that oil return flows to the first hydraulic fluid port A, or the oil by being connected with the second hydraulic fluid port C1 by the oil circuit being connected with the second hydraulic fluid port A1
The oil circuit of road connection flows to the first hydraulic fluid port A, and the first hydraulic fluid port A is as oil return opening at this time.Such as the oil circuit being connected with the second hydraulic fluid port A1
The rod chamber of first order cylinder barrel in corresponding multi-stage expansion hydraulic cylinder, you can realize the retraction of first order hydraulic cylinder；With the second oil
The oil circuit of mouth C1 connections corresponds to the rod chamber of the second level cylinder barrel in multi-stage expansion hydraulic cylinder, you can realizes second level hydraulic cylinder
Retract.
As shown in figure 4, the present invention also proposes a kind of multi-stage expansion hydraulic system, including at least two-stage hydraulic cylinder and above-mentioned
Extension and contraction control valve, described at least two second hydraulic fluid port A1, C1 on the extension and contraction control valve respectively with least two-stage hydraulic pressure
Each rodless cavity connection of cylinder, is additionally provided with the 3rd hydraulic fluid port B1 and the 4th hydraulic fluid port B on the valve body, the 3rd hydraulic fluid port B1 and described
4th hydraulic fluid port B is connected, to be equipped with and described at least two as oil inlet passage or drainback passage, at least two-stage hydraulic cylinder
The internal galleries of each rod chamber connection of level hydraulic cylinder, the 3rd hydraulic fluid port B1 are connected with the internal galleries, described flexible
Control valve realizes each cylinder rod of at least two-stage hydraulic cylinder is stretched out or is retracted by the commutation of the reversal valve Y1
Independent control.
In addition, in order to realize steady control, described at least two second hydraulic fluid port A1, C1 and at least two-stage hydraulic cylinder
External connection oil circuit between each rodless cavity is equipped with balanced valve.The control chamber of each balanced valve is all connected to described
On the connection oil circuit of three hydraulic fluid port B1 and the internal galleries.
Specifically, for two-stage telescopic hydraulic system, at least two-stage hydraulic cylinder includes center piston bar 1, the
Level-one cylinder barrel 2, second level cylinder barrel 3 and central core pipe, wherein piston of the center piston bar 1 as first order telescopic hydraulic cylinder
Bar, the second level cylinder barrel 3 are set in the outside of the first order cylinder barrel 2, so that the first order cylinder barrel 2 can be used as the
The piston rod of two level telescopic hydraulic cylinder, the end of the center piston bar 1 are equipped with the 5th hydraulic fluid port A2, the 6th hydraulic fluid port C2 and the 7th oil
The rodless cavity S1 of mouth B2, the 5th hydraulic fluid port A2 and the first order telescopic hydraulic cylinder is by being arranged at the center piston bar 1
On the connection of the first internal galleries, the rodless cavity S3 of the 6th hydraulic fluid port C2 and the second level telescopic hydraulic cylinder is by described
Entreat core pipe connection, the rod chamber S2 of the 7th hydraulic fluid port B2 and the first order telescopic hydraulic cylinder by be arranged at it is described in be indecisive and changeable
The second internal galleries connection on stopper rod 1, the rod chamber S2 of the first order telescopic hydraulic cylinder and the second level telescopic hydraulic
The rod chamber S4 of cylinder is connected by the 3rd internal galleries being arranged on the first order cylinder barrel 2.
The present invention also proposes that a kind of arm of derrick stretches hydraulic control system, including arm and above-mentioned multi-stage expansion hydraulic system,
The multi-stage expansion hydraulic system is used for the stretching or retraction for controlling the arm.
Stretch below to extension and contraction control valve of the present invention, multi-stage expansion hydraulic system and arm of derrick a reality of hydraulic control system
The course of work for applying example illustrates：
By taking two level telescopic hydraulic cylinder as an example, by extension and contraction control valve, to realize the independent control of two level telescopic hydraulic cylinder.
If fixed with center piston bar 1, then first order cylinder barrel 2 and second level cylinder barrel 3 can turn right and be acted (similarly
Fixed with second level cylinder barrel 3, then first order cylinder barrel 2 and center piston bar 1 just no longer individually illustrate toward left movement, this situation).
1st, two level telescopic hydraulic cylinder stretches out process：
When needing first order cylinder barrel 2 to stretch out, pressure oil enters from the first hydraulic fluid port A, and reversal valve Y1 must not be electric at this time, spool
Working in bottom, pressure oil can be applied to the second inserted valve F2 upper ends by the first shuttle valve F3, then by reversal valve Y1, due to
Second inserted valve F2 spool difference in areas, spool are closed, and the first inserted valve F1 upper ends do not control oily effect, therefore the first inserting
Valve F1 is opened, and the pressure oil of the first hydraulic fluid port of working connection A comes out from the second hydraulic fluid port A1, then enters center by the first balanced valve P1
The 5th hydraulic fluid port A2 on piston rod 1, then gone out for A3 mouthfuls from hydraulic fluid port by the first internal galleries inside center piston bar 1, pressure oil
Come, enter the rodless cavity S1 of first order telescopic hydraulic cylinder.Oil return route is as follows at the same time：The rod chamber of first order telescopic hydraulic cylinder
Fluid in S2 is flowed out by hydraulic fluid port B3 by the second internal galleries inside center piston bar 1 from the 7th hydraulic fluid port B2, then passes through
Three hydraulic fluid port B1 enter extension and contraction control valve, are flowed out from the 4th hydraulic fluid port B, realize smooth oil return.First order is stretched liquid during this
The rodless cavity S1 of cylinder pressure is constantly full of fluid, so as to fulfill the extending action of first order cylinder barrel 2 and second level cylinder barrel 3.
Oil inlet simplifies route：A→F1→A1→P1→A2→A3→S1
Oil return simplifies route：S2→B3→B2→B1→B
When needing second level cylinder barrel 3 to stretch out, pressure oil enters from the first hydraulic fluid port A, and reversal valve Y1 is obtained electric at this time, at spool
In upper work, pressure oil can be applied to the first inserted valve F1 upper ends by the first shuttle valve F3, then by reversal valve Y1, due to
One inserted valve, 1 spool difference in areas, spool is closed, and the second inserted valve F2 upper ends do not control oily effect, therefore the second inserted valve
F2 is opened, and the pressure oil of the first hydraulic fluid port of working connection A comes out from the second hydraulic fluid port C1, then is indecisive and changeable in being entered by the second balanced valve P2
The 6th hydraulic fluid port C2 on stopper rod 1, flows into the central core pipe chamber S0 inside center piston bar 1, and pressure oil comes out from hydraulic fluid port C3, enters
To the rodless cavity S3 of second level telescopic hydraulic cylinder.Oil return route is as follows at the same time：In the rod chamber S4 of second level telescopic hydraulic cylinder
Fluid is come out by hydraulic fluid port B5 by the 3rd internal galleries of second level cylinder barrel 3 from hydraulic fluid port B4, enters first order telescopic hydraulic cylinder
Rod chamber S2, pass through hydraulic fluid port B3 by being flowed out to the second internal galleries inside center piston bar 1 from the 7th hydraulic fluid port B2, then
Extension and contraction control valve is entered by the 3rd hydraulic fluid port B1, is flowed out from the 4th hydraulic fluid port B, realizes smooth oil return.The second level during this
The rodless cavity S3 of telescopic hydraulic cylinder is constantly full of fluid, so as to fulfill the extending action of second level cylinder barrel 3.
Oil inlet simplifies route：A→F2→C1→P2→C2→S0→C3→S3
Oil return simplifies route：S4→B5→B4→S2→B3→B2→B1→B
2nd, two level telescopic hydraulic cylinder retraction process：
When needing first order cylinder barrel 2 to retract, pressure oil enters extension and contraction control valve from the 4th hydraulic fluid port B, then from the 3rd hydraulic fluid port
B1 flows out, and enters the 7th hydraulic fluid port B2 of center piston bar 1, then pass through the second internal galleries inside center piston bar 1, pressure
Oil comes out from mouth oil B3, enters in the rod chamber S2 of first order telescopic hydraulic cylinder.Oil return route is as follows at the same time：The first order is stretched
Fluid in the rodless cavity S1 of hydraulic cylinder enters the first internal galleries of center piston bar 1 from hydraulic fluid port A3, then from the 5th oil
Mouth A2 outflows, by the first balanced valve P1, at this time since the pressure control oil on in-line is applied to a left side of the first balanced valve P1
End, the first balanced valve P1 is switched to left position work, therefore oil return can flow to the second hydraulic fluid port A1 by the first balanced valve P1, enter
Extension and contraction control valve.An oil return part flows to the first inserted valve F1, and a part is by the second shuttle valve F4, then by the first shuttle valve F3,
The upper end of the second inserted valve F2 is applied to by reversal valve Y1 again, the upper surface of the first inserted valve F1 does not have control pressure oily, returns
Oil can open the first inserted valve F1, then be flowed out by the first hydraulic fluid port A.When the first inserted valve F1 is opened, due to spool
Difference in areas, can produce certain back pressure, this back pressure value is exactly to be applied to the control pressure value of the second inserted valve F2 upper ends.
Oil inlet simplifies route：B → B1 → B2 → B3 → S2 (Y1 must not be electric, bottom work)
Oil return simplifies route：S1→A3→A2→P1→A1→F1→A
Below referring again to the state of second level cylinder barrel 3 at this time.When the 4th hydraulic fluid port B has pressure oil, pressure oil can be applied to
On second balanced valve P2, the second balanced valve P2 at this time is conducting.Know that pressure oil has been introduced into the first order above
The rod chamber S2 of telescopic hydraulic cylinder, when pressure oil continues through the 4th hydraulic fluid port B, the rod chamber S2 of first order telescopic hydraulic cylinder is continuous
Full of fluid, fluid is possible to stretch liquid into the second level by hydraulic fluid port B5 by the 3rd internal galleries of first order cylinder barrel 2
The rod chamber S4 of cylinder pressure, pressure oil may promote second level cylinder barrel 3 to retract, but can second level cylinder barrel 3 retract, and also depend on
It is whether unimpeded in the oil return line of the rodless cavity S3 of second level telescopic hydraulic cylinder.The rodless cavity S3 of second level telescopic hydraulic cylinder is through oil
Mouthful C3, into central core pipe chamber S0, flows out from the 6th hydraulic fluid port C2, then the second balanced valve P2 by opening, by the second oil C1 into
Enter the second inserted valve F2 in extension and contraction control valve, but understand that the effect of the second inserted valve F2 upper ends has control to press by being analyzed above at this time
Power oil, therefore the second inserted valve F2 is to close, therefore the drainback passage of second level cylinder barrel 3 is obstructed, i.e., second level cylinder barrel 3 can not
Retract.
Similarly, when second level cylinder barrel 3 needs to retract, pressure oil enters extension and contraction control valve 1 from the 4th hydraulic fluid port B, then from the
Three hydraulic fluid port B1 flow out, and on the one hand open the first balanced valve P1, on the one hand enter the 7th hydraulic fluid port B2 of two-stage telescopic hydraulic cylinder 2,
Again by the second internal galleries of center piston bar 21, flowed out from hydraulic fluid port B3, enter the rod chamber of first order telescopic hydraulic cylinder
In S2, then by hydraulic fluid port B4, flowed out by the 3rd internal galleries from hydraulic fluid port B5, enter the rod chamber S4 of second level telescopic hydraulic cylinder
In.
Oil return route is as follows at the same time：Fluid in the rodless cavity S3 of second level telescopic hydraulic cylinder enters center by hydraulic fluid port C3
Core pipe chamber S0, flows out from the 6th hydraulic fluid port C2, by the first balanced valve P1 of opening, extension and contraction control valve 1 is entered by hydraulic fluid port C1.Return
An oily part flows to the second inserted valve F2, and by the second shuttle valve F4 and the first shuttle valve F3, then by reversal valve Y1, (Y1 is obtained a part
Electricity, upper work) upper end of the first inserted valve F1 is applied to, the upper surface of the second inserted valve F2 does not have control pressure oil, oil return
The second inserted valve F2 can be opened and then flowed out by the first hydraulic fluid port A.When the second inserted valve F2 is opened, due to the area of spool
Difference, can produce certain back pressure, this back pressure value is exactly to be applied to the control pressure value of the first inserted valve F1 upper ends.
Oil circuit is simplified as：
In-line：B → B1 → B2 → B3 → S2 → B4 → B5 → S4 (Y1 obtains electric, upper work)
Oil return line：S3→C3→S0→C2→P2→C1→F2→A
Below referring again to the state of first order cylinder barrel 2 at this time.When the 4th hydraulic fluid port B has pressure oil, pressure oil can be applied to
On first balanced valve P1, the first balanced valve P1 at this time is conducting.Know that pressure oil has been introduced into the first order above
The rod chamber S2 of telescopic hydraulic cylinder, when pressure oil continues through the 4th hydraulic fluid port B, pressure oil may promote first order cylinder barrel 2 to contract
Return, but can first order cylinder barrel 2 retract, and whether smooth the oil return line for also depending on the rodless cavity S1 of first order telescopic hydraulic cylinder is
It is logical.The rodless cavity S1 of first order telescopic hydraulic cylinder, into the first internal galleries, flows out, then lead to through hydraulic fluid port A3 from the 5th hydraulic fluid port A2
The the first balanced valve P1 opened is crossed, the first inserted valve F1 in extension and contraction control valve 1 is entered by the second hydraulic fluid port A1, but at this time by above
Analysis understands that the effect of the first inserted valve F1 upper ends has control pressure oil, therefore the first inserted valve F1 is to close, therefore the first order
The drainback passage of cylinder barrel 2 is obstructed, i.e., first order cylinder barrel 2 can not retract.
By above-mentioned analysis, the present invention can control the action that extends and retracts of two-stage telescopic hydraulic cylinder respectively, and
And from sequentially limiting, there is complete independence.
Pass through the multiple realities for the hydraulic control system that stretches to extension and contraction control valve of the present invention, multi-stage expansion hydraulic system and arm of derrick
Apply the explanation of example, it can be seen that：
1st, the application of extension and contraction control valve and multi-stage expansion hydraulic system so that hydraulic cylinder is changed into multistage liquid from multiple hydraulic cylinders
Cylinder pressure, it is possible to reduce the quantity of hydraulic cylinder, reduces cost；In the arrangement of arm inner space, larger space can be provided, be easy to
The placement of rope mechanism and the optimization of arm section performance；And the weight of hydraulic cylinder can be mitigated significantly, the hydraulic pressure when arm stretches out
Moved after the center of gravity of cylinder, so as to improve lifting performance and whole vehicle stability, operating efficiency also significantly improves.
2nd, multistage hydraulic cylinder can be controlled individually, from sequentially limiting, solve the control problem of current multistage hydraulic cylinder, energy
Enough meet the various applying working conditions of equipment.
3rd, in terms of maintainability, the present invention need not set control valve inside oil cylinder, reduce trouble point, improve flexible
The reliability of system.
4th, the control logic of extension and contraction control valve is simple, easily realizes, easy to operate, and control is reliable.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that：Still
It can modify to the embodiment of the present invention or equivalent substitution is carried out to some technical characteristics；Without departing from this hair
The spirit of bright technical solution, it should all cover among the claimed technical solution scope of the present invention.
Claims (7)
1. a kind of multi-stage expansion hydraulic system, it is characterised in that described flexible including at least two-stage hydraulic cylinder and extension and contraction control valve
Control valve includes valve body, and the valve body is equipped with the first hydraulic fluid port (A) and at least two second hydraulic fluid ports (A1, C1), first oil
Mouth (A) is connected with logical oily oil circuit between at least two second hydraulic fluid port (A1, C1) respectively, leads to described in each bar on oily oil circuit and divides
Not She You on-off valve, the control port of each on-off valve is connected by reversal valve (Y1) with control oil sources respectively, passes through institute
Selection to each on-off valve can be realized by stating the commutation of reversal valve (Y1), and then realize the conducting to the logical oily oil circuit
Or block；The control oil sources comes from first hydraulic fluid port (A) and at least two second hydraulic fluid port (A1, C1) pressure most
Big hydraulic fluid port, at least two second hydraulic fluid port (A1, C1) on the extension and contraction control valve respectively with least two-stage hydraulic pressure
Each rodless cavity of cylinder connects, and the 3rd hydraulic fluid port (B1) and the 4th hydraulic fluid port (B), the 3rd hydraulic fluid port (B1) are additionally provided with the valve body
Connected with the 4th hydraulic fluid port (B), to be equipped with and institute as oil inlet passage or drainback passage, at least two-stage hydraulic cylinder
The internal galleries of each rod chamber connection of at least two-stage hydraulic cylinder are stated, the 3rd hydraulic fluid port (B1) connects with the internal galleries
Logical, the extension and contraction control valve realizes each cylinder rod at least two-stage hydraulic cylinder by the commutation of the reversal valve (Y1)
The independent control stretched out or retracted.
2. multi-stage expansion hydraulic system according to claim 1, it is characterised in that the on-off valve is inserted valve.
3. multi-stage expansion hydraulic system according to claim 2, it is characterised in that further include shuttle valve network, the shuttle valve
Network is used to choose the maximum pressure in first hydraulic fluid port (A) and at least two second hydraulic fluid port (A1, C1), and passes through institute
The control port that reversal valve (Y1) feeds back to the selected on-off valve is stated, so that the selected on-off valve is closed, and
Open the non-selected on-off valve.
4. multi-stage expansion hydraulic system according to claim 1, it is characterised in that at least two second hydraulic fluid port (A1,
C1) the external connection oil circuit between each rodless cavity of at least two-stage hydraulic cylinder is equipped with balanced valve.
5. multi-stage expansion hydraulic system according to claim 4, it is characterised in that the control chamber of each balanced valve is equal
It is connected on the connection oil circuit of the 3rd hydraulic fluid port (B1) and the internal galleries.
6. multi-stage expansion hydraulic system according to claim 1, it is characterised in that during at least two-stage hydraulic cylinder includes
It is indecisive and changeable stopper rod (1), first order cylinder barrel (2), second level cylinder barrel (3) and central core pipe, wherein the center piston bar (1) is used as the
The piston rod of level-one telescopic hydraulic cylinder, the second level cylinder barrel (3) are set in the outside of the first order cylinder barrel (2), so that
The first order cylinder barrel (2) can be equipped with as the piston rod of second level telescopic hydraulic cylinder, the end of the center piston bar (1)
5th hydraulic fluid port (A2), the 6th hydraulic fluid port (C2) and the 7th hydraulic fluid port (B2), the 5th hydraulic fluid port (A2) and the first order telescopic hydraulic
The rodless cavity (S1) of cylinder is connected by the first internal galleries being arranged on the center piston bar (1), the 6th hydraulic fluid port
(C2) connect with the rodless cavity (S3) of the second level telescopic hydraulic cylinder by the central core pipe, the 7th hydraulic fluid port (B2) and
The rod chamber (S2) of the first order telescopic hydraulic cylinder is connected by the second internal galleries being arranged on the center piston bar (1)
Logical, the rod chamber (S2) of the first order telescopic hydraulic cylinder passes through setting with the rod chamber (S4) of the second level telescopic hydraulic cylinder
In the 3rd internal galleries connection on the first order cylinder barrel (2).
The hydraulic control system 7. a kind of arm of derrick stretches, it is characterised in that including arm and as described in any one of claim 1~6
Multi-stage expansion hydraulic system, the multi-stage expansion hydraulic system are used for the stretching or retraction for controlling the arm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511024320.1A CN105545853B (en) | 2015-12-31 | 2015-12-31 | Extension and contraction control valve, multi-stage expansion hydraulic system and arm of derrick stretch hydraulic control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511024320.1A CN105545853B (en) | 2015-12-31 | 2015-12-31 | Extension and contraction control valve, multi-stage expansion hydraulic system and arm of derrick stretch hydraulic control system |
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| CN105545853B true CN105545853B (en) | 2018-04-17 |
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| CN105782164B (en) * | 2016-05-26 | 2017-11-14 | 中国人民解放军国防科学技术大学 | Multicarity hydraulic cylinder and its control system and control method |
| CN106089839B (en) * | 2016-07-20 | 2018-03-20 | 武汉船用机械有限责任公司 | A kind of valve group for passive heave compensation system and the system with the valve group |
| CN108302090A (en) * | 2018-01-08 | 2018-07-20 | 徐州重型机械有限公司 | A kind of multilayer core pipe two-stage hydraulic cylinder and crane |
| CN108483263B (en) * | 2018-06-25 | 2019-10-22 | 北汽福田汽车股份有限公司 | Hydraulic control valve, hydraulic system and crane |
| CN110043528B (en) * | 2019-03-20 | 2021-01-15 | 湖南双达机电有限责任公司 | Multi-stage telescopic oil cylinder and crane |
| CN110081042B (en) * | 2019-05-21 | 2021-01-12 | 徐州徐工液压件有限公司 | Multistage telescopic hydraulic cylinder with staged independent extension and synchronous retraction |
| CN110529460B (en) * | 2019-08-23 | 2021-05-07 | 四川长江工程起重机有限责任公司 | Two-stage telescopic arm oil cylinder of automobile crane |
| CN111022401B (en) * | 2019-11-18 | 2021-08-31 | 杭州电子科技大学 | Bistable soft on-off valve for soft robot and use method thereof |
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