CN103307050B - Multi-stage support leg hydraulic control system and control method of multi-stage support leg hydraulic system - Google Patents
Multi-stage support leg hydraulic control system and control method of multi-stage support leg hydraulic system Download PDFInfo
- Publication number
- CN103307050B CN103307050B CN201310255809.4A CN201310255809A CN103307050B CN 103307050 B CN103307050 B CN 103307050B CN 201310255809 A CN201310255809 A CN 201310255809A CN 103307050 B CN103307050 B CN 103307050B
- Authority
- CN
- China
- Prior art keywords
- oil cylinder
- support oil
- supporting leg
- selector valve
- multistage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 34
- 238000001514 detection method Methods 0.000 claims description 80
- 238000007689 inspection Methods 0.000 claims description 24
- 230000008569 process Effects 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 4
- 230000008602 contraction Effects 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 173
- 230000000694 effects Effects 0.000 description 7
- 238000010587 phase diagram Methods 0.000 description 7
- 230000005611 electricity Effects 0.000 description 4
- 239000010720 hydraulic oil Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Landscapes
- Actuator (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention provides a multi-stage support leg hydraulic control system and a control method of the multi-stage support leg hydraulic system. A multi-stage leg hydraulic control system comprising: the first reversing valve comprises a first working port and a second working port, and a rod cavity of the first support leg oil cylinder and a rod cavity of the second support leg oil cylinder are both connected with the first working port of the first reversing valve; a second working port of the first reversing valve is connected with a first bidirectional port of the second reversing valve, and a rodless cavity of the first leg oil cylinder is connected with a second bidirectional port of the second reversing valve; and the controller is electrically connected with the first reversing valve and the second reversing valve, and controls the second reversing valve to reverse according to the telescopic positions of the first support leg oil cylinder and the second support leg oil cylinder, so that the rodless cavity of the first support leg oil cylinder and the rodless cavity of the second support leg oil cylinder are switchably connected with the first two-way port of the second reversing valve, and the sequential movement of the first support leg oil cylinder and the second support leg oil cylinder is controlled. The invention has the characteristics of simple structure and low cost.
Description
Technical field
The present invention relates to Hydraulic Field, more specifically, relate to the controlling method of a kind of multistage hydraulic control system of landing legs and multistage support leg hydraulic system.
Background technique
At present, the multistage hydraulic control system of landing legs of engineering vehicle comprises: (1) single oil cylinder as shown in Figure 1 adds supporting leg rope guide to control the system of two-stage supporting leg synchronization telescope; (2) two oil cylinders as shown in Figure 2 add sequence valve to control the system of the supporting leg sequential telescopic of two oil cylinder.
Please refer to Fig. 1, the mode that single oil cylinder adds supporting leg rope guide is the principal mode that engineering vehicle two-stage movable supporting legs stretches, the two ends of telescopic oil cylinder 1 are arranged on fixed supporting leg and first order movable supporting legs respectively, and selector valve 6 is connected with telescopic oil cylinder 1, to control the flexible of first order movable supporting legs; Stretch out wire rope and pull back wire rope for controlling the synchronization telescope of secondary activity supporting leg and first order movable supporting legs.Although this mode technology is more ripe, but stretch out the form of retraction wire rope, integrated model can be made more complicated, maintainable poor, and due to first order movable supporting legs and secondary activity supporting leg be synchronization telescope, be that movable supporting legs one and movable supporting legs two respectively stretch out half when partly stretching operating mode, all do not overlap, cause supporting leg intensity more weak, constrain vehicle performance.
Please refer to Fig. 2, add in this hydraulic control system of sequence valve at two oil cylinder, two telescopic oil cylinders 2 and 3 control two movable supporting legs respectively, and flexible sequentially-operating is controlled by two sequence valves 4 and 5.When stretching out, after first order movable supporting legs stretches out completely, stretch out sequence valve and open, order stretches out secondary activity supporting leg; During retraction, after secondary activity supporting leg is retracted completely, retraction sequence valve is opened, order retraction first order movable supporting legs.This mode overall structure is comparatively simple, maintainable good.But because movable supporting legs makes individual difference, not easily adjustment is accurate completely to make the pressure of sequence valve, can affect the complete sequentially-operating of movable supporting legs; And during supporting leg retraction, because oil cylinder rodless cavity area is large, need recirculating oil quantity large, make return oil pressure large, cause supporting leg retraction speed unstable, thus have impact on the performance of car load.
In addition, multiple (more than three kinds and three kinds) telescopic location that these two kinds of modes all do not realize movable supporting legs controls, not high to the adaptability in engineering vehicle place, further, all adopt after landing leg stretching and fix in the mode of perforate latch, have certain weakening to movable supporting legs intensity.
Summary of the invention
The present invention aims to provide the controlling method of a kind of structure is simple, cost is low, two oil cylinder sequentially-operating is accurate, easy to operate multistage hydraulic control system of landing legs and multistage support leg hydraulic system.
For solving the problems of the technologies described above, according to a first aspect of the invention, provide a kind of multistage hydraulic control system of landing legs, comprising: the first support oil cylinder; Second support oil cylinder; First selector valve, the first selector valve comprises the first working hole and the second working hole, and the rod chamber of the first support oil cylinder and the rod chamber of the second support oil cylinder are all connected with the first working hole of the first selector valve; Pressure oil from oil sources switches between the first working hole and the second working hole, stretches out to control multistage supporting leg or shrinks; Second selector valve, second working hole of the first selector valve is connected with the first bidirectional interface of the second selector valve, the rodless cavity of the first support oil cylinder is connected with the second bidirectional interface of the second selector valve, and the rodless cavity of the second support oil cylinder is connected with the 3rd bidirectional interface of the second selector valve; Controller, be electrically connected with the first selector valve and the second selector valve, telescopic location according to the first support oil cylinder and the second support oil cylinder controls the second selector valve commutation, to make the rodless cavity of the rodless cavity of the first support oil cylinder and the second support oil cylinder switchably be connected with the first bidirectional interface of the second selector valve, thus control the sequential movements of the first support oil cylinder and the second support oil cylinder.
Further, multistage hydraulic control system of landing legs also comprises: one-way throttle valve, and the rod chamber of the first support oil cylinder and the rod chamber of the second support oil cylinder are connected with the first working hole of the first selector valve by one-way throttle valve.
Further, multistage hydraulic control system of landing legs also comprises bidirectional hydraulic lock, is connected with bidirectional hydraulic lock between the rodless cavity of the first support oil cylinder and the rod chamber of the first support oil cylinder and/or between the rodless cavity of the second support oil cylinder and the rod chamber of the second support oil cylinder.
Further, multistage supporting leg comprises fixed supporting leg, first order supporting leg and second level supporting leg, first order supporting leg axially has multiple by the first detection position of encoding along it, in each first inspection positions, the first inductor is installed, fixed supporting leg arranges the first detection device for detecting the first inductor.
Further, first order supporting leg axially has multiple by the second detection position of encoding along it, be provided with the second inductor, second level supporting leg is provided with the second detection device for detecting the second inductor in each second inspection positions.
Further, controller judges the telescopic location of multistage supporting leg according to the information that the first detection device and second detection device send, to control the second selector valve commutation.
According to a second aspect of the invention, provide a kind of controlling method of multistage support leg hydraulic system, comprising: provide the first selector valve to carry out stretching out or contractile motion to control multistage supporting leg; Second selector valve is provided, controls the commutation of the second selector valve according to the telescopic location of multistage supporting leg; Stretch out in process at multistage supporting leg, the pressure oil exported by the first selector valve is switched between the rodless cavity and the rodless cavity of the second support oil cylinder of the first support oil cylinder of multistage supporting leg by the second selector valve, thus control the first support oil cylinder and the second support oil cylinder order are stretched out; In the process that multistage supporting leg shrinks, the pressure oil exported by the first selector valve is communicated with the rod chamber of the first support oil cylinder and the rod chamber of the second support oil cylinder, the commutation of the second selector valve makes the rodless cavity of the rodless cavity of the first support oil cylinder or the second support oil cylinder be connected with oil circuit by the first selector valve successively, thus controls the second support oil cylinder and the contraction of the first support oil cylinder order.
Further, controlling method also comprises: on the rod chamber of the first support oil cylinder and the oil circuit between the rod chamber of the second support oil cylinder and the first selector valve, arrange one-way throttle valve.
Further, controlling method also comprises: between the rodless cavity and the rod chamber of the first support oil cylinder of the first support oil cylinder and/or between the rodless cavity of the second support oil cylinder and the rod chamber of the second support oil cylinder, arrange bidirectional hydraulic lock.
Further, controlling method also comprises: the first order supporting leg of multistage supporting leg axially has multiple by the first detection position of encoding along it, in each first inspection positions, the first inductor is installed, the fixed supporting leg of multistage supporting leg is provided with the first detection device for detecting the first inductor.
Further, first order supporting leg axially has multiple by the second detection position of encoding along it, be provided with the second inductor, second level supporting leg is provided with the second detection device for detecting the second inductor in each second inspection positions.
Further, controlling method also comprises: the information sent according to the first detection device and second detection device judges the telescopic location of multistage supporting leg, to control the action of the second selector valve.
The present invention utilizes controller to judge the commutation opportunity of the second selector valve according to the telescopic location of the first support oil cylinder and the second support oil cylinder, thus when the first support oil cylinder and the motion of the second support oil cylinder arrive precalculated position, control the second selector valve to commutate, switchably be connected with the first bidirectional interface of the second selector valve to make the rodless cavity of the rodless cavity of the first support oil cylinder and the second support oil cylinder, reach the object of the sequential movements of control first support oil cylinder and the second support oil cylinder, have the advantages that structure is simple, cost is low, do not affect vehicle performance.Further, the first support oil cylinder, the second support oil cylinder sequential telescopic, can realize supporting leg and work under the operating mode of multiple extrusion, can meet the supporting leg working condition requirement of different extrusion, higher to the adaptability of different operating mode, uses more convenient.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 diagrammatically illustrates the hydraulic schematic diagram of a kind of multistage hydraulic control system of landing legs of the prior art;
Fig. 2 diagrammatically illustrates the hydraulic schematic diagram of the multistage hydraulic control system of landing legs of another kind of the prior art;
Fig. 3 diagrammatically illustrates the hydraulic schematic diagram of the multistage hydraulic control system of landing legs in the present invention;
Fig. 4 diagrammatically illustrates phase diagram when leg system is in full reduced;
Fig. 5 diagrammatically illustrates the plan view of first order supporting leg;
Fig. 6 diagrammatically illustrates the plan view of first order supporting leg;
Fig. 7 diagrammatically illustrate leg system be in 1/3 flexible time phase diagram;
Fig. 8 diagrammatically illustrate leg system be in 3/4 flexible time phase diagram; And
Fig. 9 diagrammatically illustrates leg system and is in phase diagram when entirely stretching.
Reference character in figure: 1, telescopic oil cylinder; 2, telescopic oil cylinder; 3, telescopic oil cylinder; 4, sequence valve; 5, sequence valve; 6, selector valve; 10, the first inductor; 20, the first detection device; 30, the first selector valve; 31, the first working hole; 32, the second working hole; 40, the second selector valve; 41, the first bidirectional interface; 42, the second bidirectional interface; 43, the 3rd bidirectional interface; 50, one-way throttle valve; 60, bidirectional hydraulic lock; 70, multistage supporting leg; 71, fixed supporting leg; 72, first order supporting leg; 73, second level supporting leg; 74, the first support oil cylinder; 75, the second support oil cylinder; 80, the second inductor; 90, second detection device; 100, supporting leg Vertical Cylinders; 110, pump.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
As a first aspect of the present invention, please refer to Fig. 3, provide a kind of multistage hydraulic control system of landing legs, especially, can be applicable in the engineering vehicles such as hoist.
This multistage hydraulic control system of landing legs comprises: the first support oil cylinder 74; Second support oil cylinder 75; First selector valve 30, first selector valve 30 comprises the first working hole 31 and the rod chamber of the second working hole 32, first support oil cylinder 74 and the rod chamber of the second support oil cylinder 75 and is all connected with the first working hole 31 of the first selector valve 30; Pressure oil from oil sources switches between the first working hole 31 and the second working hole 32, and stretch out to control multistage supporting leg 70 or shrink, namely controlling multistage supporting leg 70 is carry out stretching out motion, still carries out contractile motion; Second selector valve 40, second working hole 32 of the first selector valve 30 is connected with the first bidirectional interface 41 of the second selector valve 40, the rodless cavity of the first support oil cylinder 74 is connected with the second bidirectional interface 42 of the second selector valve 40, and the rodless cavity of the second support oil cylinder 75 is connected with the 3rd bidirectional interface 43 of the second selector valve 40; Controller, be electrically connected with the first selector valve 30 and the second selector valve 40, control the second selector valve 40 according to the telescopic location of the first support oil cylinder 74 and the second support oil cylinder 75 to commutate, to make the rodless cavity of the rodless cavity of the first support oil cylinder 74 and the second support oil cylinder 75 switchably be connected with the first bidirectional interface 41 of the second selector valve 40, thus control the sequential movements of the first support oil cylinder 74 and the second support oil cylinder 75.
Please refer to Fig. 3, when stretching supporting leg, the first selector valve 30 obtains electric, works in left position.Second selector valve 40 must not be electric, works in left position.Pressure oil in system is entered the rodless cavity of the first support oil cylinder 74 through the left position of the left position of the first selector valve 30 and the second selector valve 40 by pump 110, the hydraulic oil of the rod chamber of the first support oil cylinder 74 passes through the left bit stream oil sump tank of the first selector valve 30, thus it is protruding to promote the first support oil cylinder 74.After controller learns that the first support oil cylinder 74 reaches position, output signal make the second selector valve 40 electric after work in right position.Now, in system, pressure oil enters the rodless cavity of the second support oil cylinder 75 behind the right position of the left position of the first selector valve 30, the second selector valve 40, the pressure oil of the second support oil cylinder 75 rod chamber passes through the left bit stream oil sump tank of the first selector valve 30, thus promote stretching out of the second support oil cylinder 75, and the order finally completing two oil cylinder is stretched out.
During contracting supporting leg, the first selector valve 30 obtains electric, works in right position; Second selector valve 40 electricly must work in right position.Pressure oil in system enters the rod chamber of the second support oil cylinder 75 through the right position of the first selector valve 30 without the second selector valve 40, the hydraulic oil of its rodless cavity passes through the right position of the second selector valve 40, the right bit stream oil sump tank of the first selector valve 30, to promote the retraction of the second support oil cylinder 75.After controller learns that the second support oil cylinder 75 is reduced to position, output signal make the second selector valve 40 dead electricity and work in left position.Now, pressure oil in system enters the rod chamber of the first support oil cylinder 74 through the right position of the first selector valve 30, the hydraulic oil of its rodless cavity is by the left position of the second selector valve 40, the right bit stream oil sump tank of the first selector valve 30, to promote the retraction of the first support oil cylinder 74, thus the order finally completing two oil cylinder is retracted.
The present invention utilizes controller to judge the commutation opportunity of the second selector valve 40 according to the telescopic location of the first support oil cylinder 74 and the second support oil cylinder 75, thus when the first support oil cylinder 74 and the motion of the second support oil cylinder 75 arrive precalculated position, control the second selector valve 40 to commutate, switchably be connected with the first bidirectional interface 41 of the second selector valve 40 to make the rodless cavity of the rodless cavity of the first support oil cylinder 74 and the second support oil cylinder 75, reach the object of the sequential movements of control first support oil cylinder 74 and the second support oil cylinder 75, there is structure simple, cost is low, do not affect the feature of vehicle performance.
Multistage hydraulic control system of landing legs in the present invention adopts two oil cylinder supporting leg expansion device, compared with adding supporting leg rope guide, simplifies mechanism, substantially increases the maintainability of equipment with single oil cylinder of the prior art.Further, two oil cylinder sequentially-operatings of the multistage hydraulic control system of landing legs in the present invention are accurate, easy to operate, avoid the inseparable problem with being difficult to separate of the sequentially-operating adopting sequence valve of the prior art to bring.
Preferably, please refer to Fig. 3, multistage hydraulic control system of landing legs also comprises: one-way throttle valve 50, and the rod chamber of the first support oil cylinder 74 and the rod chamber of the second support oil cylinder 75 are connected with the first working hole 31 of the first selector valve 30 by one-way throttle valve 50.Owing to being connected with one-way throttle valve 50 at the rodless cavity of the first support oil cylinder 74 and the rod chamber side of the second support oil cylinder 75, therefore, when supporting leg stretches out, the rodless cavity of the first support oil cylinder 74 and the rodless cavity oil-feed of the second support oil cylinder 75, rod chamber, by one-way valve oil return in one-way throttle valve 50, can not affect the speed of stretching out; When supporting leg is retracted, the rodless cavity of the first support oil cylinder 74 and the rod chamber of the second support oil cylinder 75, by the throttle valve oil-feed in one-way throttle valve 50, can play the effect of stable retraction speed.Visible, adopt one-way throttle valve 50, when solving the multistage support leg hydraulic system retraction adopting sequence valve, the problem of speed instability, improves retraction speed, improves efficiency.
Preferably, please refer to Fig. 3, multistage hydraulic control system of landing legs also comprises bidirectional hydraulic lock 60, is connected with bidirectional hydraulic lock 60 between the rodless cavity of the first support oil cylinder 74 and the rod chamber of the first support oil cylinder 74 and/or between the rodless cavity of the second support oil cylinder 75 and the rod chamber of the second support oil cylinder 75.Such as, a bidirectional hydraulic lock 60 can all be connected on the rodless cavity of the first support oil cylinder 74 and the second support oil cylinder 75.After landing leg stretching, the hydraulic oil of the rodless cavity of the first support oil cylinder 74 and the respective rod chamber of the second support oil cylinder 75 and rodless cavity is pinned by bidirectional hydraulic lock 60, thus the locking of the rodless cavity achieved the first support oil cylinder 74 and the second support oil cylinder 75, that is, achieve the locking to movable supporting legs, thus when avoiding operation, telescopic outrigger moves the security incident caused, serve replace on movable supporting legs perforate latch to avoid the effect of leg motion, and alleviate the weakening of perforate to supporting leg intensity, improve the job security of vehicle.
Preferably, please refer to Fig. 4, multistage supporting leg 70 comprises fixed supporting leg 71, first order supporting leg 72 and second level supporting leg 73, first order supporting leg 72 axially has multiple by the first detection position of encoding along it, in each first inspection positions, one or more first inductor 10 is installed, wherein, number and the position of the first inductor 10 are determined according to coding, the number that fixed supporting leg 71 arranges multiple the first detection device 20, first detection device 20 for detecting the first inductor 10 is determined according to coding.Preferably, being encoded to binary coding, obviously, also can be other coded system, as long as can realize the coding detecting position to multiple first, to be identified the first different detection positions by code signal.Adopt the mode of coding, can realize detecting the multiposition of supporting leg, thus improve the place adaptability of car load, improve the working efficiency of engineering vehicle.Especially, supporting leg Vertical Cylinders 100 is also provided with in the end of second level supporting leg 73.
Preferably, please refer to Fig. 4, first order supporting leg 72 axially has multiple by the second detection position of encoding along it, in each second inspection positions, one or more second inductor 80 is installed, number and the position of the second inductor 80 are determined according to this coding, second level supporting leg 73 arranges multiple second detection device 90 for detecting the second inductor 80, and the number of second detection device 90 is determined according to this coding.Especially, the second detection position can adopt and detect the identical or different coded system in position with first.Preferably, controller judges the telescopic location of multistage supporting leg 70 according to the coded message that the first detection device 20 and second detection device 90 send, and commutates to control the second selector valve 40.
Such as, the first detection device 20 in the present invention, second detection device 90 can adopt the mode of electromagnetism, the realizations such as such as proximity switch.In landing leg stretching process, when the first inductor 10 through the first detection device 20 or the second inductor 80 through second detection device 90 time, the first detection device 20 or the second inductor 80 will send corresponding code signal.Owing to being provided with multiple first inductor 10 and first detection device 20 corresponding with it, therefore, detect position each first, these first detection devices 20 will send different code signals, to indicate the first different detection positions.Similar, second detection device 90 also can by similar principle work.Like this, just identifiable design goes out different positions, thus make the present invention accurately complete the sequential telescopic of movable supporting legs (first order supporting leg and second level supporting leg) by the action of telescopic oil cylinder, wherein, movable supporting legs is stretched multipoint detection, drastically increases place adaptability during engineering vehicle operation.Be specially adapted to the engineering vehicle as the band such as truck crane, high-altitude operation vehicle telescopic outrigger.
Please refer to Fig. 5, at the upper surface of first order supporting leg 72, have multiple first and detect position, at its lower surface, have multiple second and detect position.In each first inspection positions, be separately installed with one or more first inductor 10; In the second inspection positions, be separately installed with one or more second inductor 80.
Such as, please refer to Fig. 5, in binary-coded situation, position is detected for first, realize its coding, position can be detected by three first and be encoded to 01,10 and 11 respectively, so, first inductor 10, first inductor 10 and two the first inductors 10 can be placed respectively three the first inspection positions.Correspondingly, the number of the first detection device 20 is also two.Now, the first inductor 10 of three the first inspection positions is arranged by the position of coding respectively.Such as, the position being encoded to 0 does not arrange the first inductor 10, and the position being encoded to 1 arranges first inductor 10.Two positions of coding are arranged along first order supporting leg 72 circumference.Please refer to Fig. 6, the coding site of each first inspection positions is (namely on the same level line of Fig. 6) that be parallel to each other, and arranges accordingly with multiple first detection device 20.Similar, please refer to Fig. 5 and Fig. 6, the second inductor 80 and second detection device 90 are also arranged on the lower surface of first order supporting leg 72 according to the first inductor 10 and the similar mode of the first detection device 20, do not repeat them here.
Obviously, first detects the number that position is detected in position and second, and can determine according to concrete needs, being not limited to the quantity shown in Fig. 5, such as, can be more than three.
Multistage supporting leg shown in Fig. 4 has five grades of telescopic locations, and namely 1/6 stretches that position is stretched in position, 1/3, namely 1/2(partly stretches) position, 3/4 stretches position and entirely stretches position.
Choose the working procedure of third gear wherein to supporting leg to be below further elaborated, the content of the realization of all the other positions and this third gear is basically identical.It should be noted that, only carry out exemplary illustration to have five grades of telescopic locations below, the quantity of landing leg stretching position can be increased or reduce based on design of the present invention.Wherein, Fig. 7 show leg system be in 1/3 flexible time phase diagram; Fig. 8 show leg system be in 3/4 flexible time phase diagram; Fig. 9 shows leg system and is in phase diagram when entirely stretching.
Please refer to Fig. 3 to Fig. 9, when stretching supporting leg, the rodless cavity oil-feed of the first support oil cylinder 74, rod chamber oil return, promote first order supporting leg 72 and stretch out.Specifically:
When reaching 1/6 position, two the first detection devices 20 that fixed supporting leg 71 is installed sense first inductor 10 of the first inspection positions being positioned at the rightmost side, so, first detection device 20 detects this first inductor 10, another first detection device 20 does not detect the first inductor 10, so two the first detection devices 20 send corresponding code signal (such as, 01).Now, controller is according to this code signal, and prompting supporting leg reaches 1/6 position.
Then, first order supporting leg 72 continues to stretch out, when reaching 1/3 position, another first detection device 20 senses first inductor 10 being positioned at that middle the first inspection positions, so two the first detection devices 20 send corresponding code signal (such as, 10), meanwhile, controller prompting supporting leg reaches 1/3 position.
Then, first order supporting leg 72 continues to stretch out to the right, namely partly stretches when reaching 1/2() position time, two the first detection devices 20 sense two the first inductors 10 of the first inspection positions being positioned at left side, so two the first detection devices 20 send corresponding code signal (such as, 11).
Now, controller gives the second selector valve 40 1 current signals, makes the second selector valve 40 obtain electric and be operated in right position, so, the rodless cavity oil-feed of the second support oil cylinder 75, rod chamber oil return, thus promotion second level supporting leg 73 stretches out.
When reaching 3/4 position, one in two second detection devices 90 that second level supporting leg 73 is installed senses second inductor 80 being positioned at the second middle inspection positions, so, two second detection devices 90 send corresponding code signal (such as 10), and controller points out 3/4 position.
Then, second level supporting leg 73 continues protruding, when reach entirely stretch position time, two second detection devices 90 sense two the second inductors 80 of the second inspection positions being positioned at right side, so two second detection devices 90 send corresponding code signal (such as 11), controller is pointed out and is entirely stretched position.Now, make the first selector valve 30 dead electricity by manual or controller and return meta.
Especially, this Time Controller can provide a time delayed signal to the second selector valve 40, make second selector valve 40 time delay power-off after several seconds, to release the pressure oil in bidirectional hydraulic lock 60 pipeline of connection second support oil cylinder 75, this bidirectional hydraulic lock 60 is reliably worked.
Please refer to Fig. 3 to Fig. 9, during contracting supporting leg, the rod chamber oil-feed of the second support oil cylinder 75, rodless cavity oil return, retract to promote second level supporting leg 73.Specifically:
When being reduced to 3/4 position, the second detection device 90 that second level supporting leg 73 is installed senses second inductor 80 being positioned at that middle second position, so two second detection devices 90 send corresponding code signal, and (such as: 10), controller points out 3/4 position.
Then, second level supporting leg 73 continue retract, partly stretch when being reduced to 1/2() position time, another second detection device 90 senses second inductor 80, so two second detection devices 90 send corresponding code signal (such as: 01), controller points out 1/2(partly to stretch) position.
Now, controller gives the second selector valve 40 1 signals, is operated in left position after making the second selector valve 40 dead electricity.So the rod chamber oil-feed of the second support oil cylinder 75, rodless cavity oil return, retract to promote first order supporting leg 72.
When being reduced to 1/3 position, first detection device 20 that fixed supporting leg 71 is installed senses first inductor 10 of that the first inspection positions middle, so two the first detection devices 20 send corresponding code signal (such as, 10), controller points out 1/3 position.
Then, first order supporting leg 72 continues to retract, when being reduced to 1/6 position, another first detection device 20 senses that first inductor 10 of that first inspection positions on right side, so two the first detection devices 20 send corresponding code signal (such as, 01), controller points out 1/6 position.
Then, first order supporting leg 72 continues to retract, until be reduced to full reduced state.Now, return meta after making the first selector valve 30 dead electricity by manual or controller, whole process is complete.
Obviously, the operating mode that the supporting leg in the present invention is not limited to entirely stretch and partly stretches, also can possess other multiple flexible operating mode.Such as, first order supporting leg is stretched entirely, and second level supporting leg stretches out 1/3,2/3 etc.Now, first can ensure that first order supporting leg preferentially all stretches out.Therefore, the present invention has the feature good to place adaptability.
Especially, multistage commutative valve (the first selector valve and the second selector valve) detects with multiposition the mode combined, and can ensure the sequentially-operating of two-stage telescopic oil cylinder accurately.
As a second aspect of the present invention, on the basis of above-mentioned multistage hydraulic control system of landing legs, the invention provides a kind of controlling method of multistage support leg hydraulic system, comprising: provide the first selector valve 30 to carry out stretching out or contractile motion to control multistage supporting leg 70; Second selector valve 40 is provided, controls the commutation of the second selector valve 40 according to the telescopic location of multistage supporting leg 70; Stretch out in process at multistage supporting leg 70, the pressure oil exported by the first selector valve 30 is switched between the rodless cavity and the rodless cavity of the second support oil cylinder 75 of the first support oil cylinder 74 of multistage supporting leg 70 by the second selector valve 40, thus control the first support oil cylinder 74 and the second support oil cylinder 75 order are stretched out; In the process that multistage supporting leg 70 shrinks, the pressure oil exported by the first selector valve 30 is communicated with the rod chamber of the first support oil cylinder 74 and the rod chamber of the second support oil cylinder 75, the commutation of the second selector valve 40 makes the rodless cavity of the rodless cavity of the first support oil cylinder 74 or the second support oil cylinder 75 be connected with oil circuit by the first selector valve 30 successively, thus controls the second support oil cylinder 75 and the contraction of the first support oil cylinder 74 order.
Preferably, controlling method also comprises: on the rod chamber of the first support oil cylinder 74 and the oil circuit between the rod chamber of the second support oil cylinder 75 and the first selector valve 30, arrange one-way throttle valve 50.
Preferably, controlling method also comprises: between the rodless cavity and the rod chamber of the first support oil cylinder 74 of the first support oil cylinder 74 and/or between the rodless cavity of the second support oil cylinder 75 and the rod chamber of the second support oil cylinder 75, arrange bidirectional hydraulic lock 60.
Preferably, controlling method also comprises: the first order supporting leg 72 of multistage supporting leg 70 axially has multiple by the first detection position of encoding along it, in each first inspection positions, one or more first inductor 10 is installed, wherein, number and the position of the first inductor 10 are determined according to coding, the number that the fixed supporting leg 71 of multistage supporting leg 70 arranges multiple the first detection device 20, first detection device 20 for detecting the first inductor 10 is determined according to coding.Preferably, binary coding is encoded to.
Preferably, first order supporting leg 72 axially has multiple by the second detection position of encoding along it, in each second inspection positions, one or more second inductor 80 is installed, number and the position of the second inductor 80 are determined according to this coding, second level supporting leg 73 arranges multiple second detection device 90 for detecting the second inductor 80, and the number of second detection device 90 is determined according to this coding.Preferably, binary coding is encoded to.
Preferably, controlling method also comprises: the coded message sent according to the first detection device 20 and second detection device 90 judges the telescopic location of multistage supporting leg 70, to control the action of the second selector valve 40.
The present invention is by the induction to diverse location first inductor and the second inductor of the first detection device and second detection device, carry out the retracted position of detected activity supporting leg, the multiposition realizing movable supporting legs controls, so that the break-make controlling the multistage valve (comprising the first selector valve 30 and the second selector valve 40) in multistage support leg hydraulic system carrys out the oil circuit of switched system, realize the sequentially-operating of oil cylinder (i.e. movable supporting legs).In addition, the present invention is connected in series one-way throttle valve in the oil circuit of the rod chamber of telescopic oil cylinder (comprising the first support oil cylinder and the second support oil cylinder), can ensure under the impregnable prerequisite of the speed of stretching out, the retraction speed of energy stabilizing leg.Finally, the present invention adopts the form locking stretching oil cylinder of bidirectional hydraulic lock, thus avoids perforate on movable supporting legs, weakens the problem of movable supporting legs intensity.
Use engineering vehicle of the present invention good to the adaptability in place, except entirely stretching and partly stretching operating mode, also possess multiple flexible operating mode, the various performances of car load can have been given play to more completely.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. a multistage hydraulic control system of landing legs, is characterized in that, comprising:
First support oil cylinder (74);
Second support oil cylinder (75);
First selector valve (30), described first selector valve (30) comprises the first working hole (31) and the second working hole (32), and the rod chamber of described first support oil cylinder (74) and the rod chamber of described second support oil cylinder (75) are all connected with described first working hole (31) of described first selector valve (30); Pressure oil from oil sources switches between described first working hole (31) and the second working hole (32), stretches out to control multistage supporting leg (70) or shrinks;
Second selector valve (40), described second working hole (32) of described first selector valve (30) is connected with first bidirectional interface (41) of described second selector valve (40), the rodless cavity of described first support oil cylinder (74) is connected with second bidirectional interface (42) of described second selector valve (40), and the rodless cavity of described second support oil cylinder (75) is connected with the 3rd bidirectional interface (43) of described second selector valve (40);
Controller, be electrically connected with described first selector valve (30) and the second selector valve (40), telescopic location according to described first support oil cylinder (74) and the second support oil cylinder (75) controls the commutation of described second selector valve (40), switchably be connected with first bidirectional interface (41) of described second selector valve (40) with the rodless cavity of the rodless cavity and described second support oil cylinder (75) that make described first support oil cylinder (74), thus control the sequential movements of described first support oil cylinder (74) and the second support oil cylinder (75).
2. multistage hydraulic control system of landing legs according to claim 1, is characterized in that, described multistage hydraulic control system of landing legs also comprises:
One-way throttle valve (50), the rod chamber of described first support oil cylinder (74) and the rod chamber of described second support oil cylinder (75) are connected with first working hole (31) of described first selector valve (30) by described one-way throttle valve (50).
3. multistage hydraulic control system of landing legs according to claim 1, it is characterized in that, described multistage hydraulic control system of landing legs also comprises bidirectional hydraulic lock (60), is connected with described bidirectional hydraulic lock (60) between the rodless cavity of described first support oil cylinder (74) and the rod chamber of described first support oil cylinder (74) and/or between the rodless cavity of described second support oil cylinder (75) and the rod chamber of described second support oil cylinder (75).
4. multistage hydraulic control system of landing legs according to claim 1, it is characterized in that, described multistage supporting leg (70) comprises fixed supporting leg (71), first order supporting leg (72) and second level supporting leg (73), described first order supporting leg (72) axially has multiple by the first detection position of encoding along it, in each described first inspection positions, the first inductor (10) is installed, at upper the first detection device (20) arranged for detecting described first inductor (10) of described fixed supporting leg (71).
5. multistage hydraulic control system of landing legs according to claim 4, it is characterized in that, described first order supporting leg (72) axially has multiple by the second detection position of encoding along it, in each described second inspection positions, the second inductor (80) is installed, described second level supporting leg (73) is provided with the second detection device (90) for detecting described second inductor (80).
6. multistage hydraulic control system of landing legs according to claim 5, it is characterized in that, described controller judges the telescopic location of described multistage supporting leg (70) according to the information that described first detection device (20) and second detection device (90) send, to control the commutation of described second selector valve (40).
7. a controlling method for multistage support leg hydraulic system, is characterized in that, comprising:
The first selector valve (30) is provided to carry out stretching out or contractile motion to control multistage supporting leg (70);
Second selector valve (40) is provided, controls the commutation of described second selector valve (40) according to the telescopic location of described multistage supporting leg (70);
Stretch out in process described multistage supporting leg (70), the pressure oil exported by described first selector valve (30) is switched between the rodless cavity and the rodless cavity of the second support oil cylinder (75) of first support oil cylinder (74) of described multistage supporting leg (70) by described second selector valve (40), thus control described first support oil cylinder (74) and the second support oil cylinder (75) order stretch out;
In the process that described multistage supporting leg (70) is shunk, the pressure oil exported by described first selector valve (30) is communicated with the rod chamber of described first support oil cylinder (74) and the rod chamber of the second support oil cylinder (75), the commutation of described second selector valve (40) makes the rodless cavity of the rodless cavity of described first support oil cylinder (74) or the second support oil cylinder (75) be connected with oil circuit by described first selector valve (30) successively, thus controls described second support oil cylinder (75) and the contraction of the first support oil cylinder (74) order.
8. controlling method according to claim 7, it is characterized in that, described controlling method also comprises: on the rod chamber of described first support oil cylinder (74) and the oil circuit between the rod chamber of described second support oil cylinder (75) and described first selector valve (30), arrange one-way throttle valve (50).
9. controlling method according to claim 7, it is characterized in that, described controlling method also comprises: between the rodless cavity and the rod chamber of described first support oil cylinder (74) of described first support oil cylinder (74) and/or between the rodless cavity of described second support oil cylinder (75) and the rod chamber of described second support oil cylinder (75), arrange bidirectional hydraulic lock (60).
10. controlling method according to claim 7, is characterized in that, described controlling method also comprises:
The first order supporting leg (72) of described multistage supporting leg (70) axially has multiple by the first detection position of encoding along it, in each described first inspection positions, the first inductor (10) is installed, the fixed supporting leg (71) of described multistage supporting leg (70) is provided with the first detection device (20) for detecting described first inductor (10).
11. controlling methods according to claim 10, it is characterized in that, described first order supporting leg (72) axially has multiple by the second detection position of encoding along it, in each described second inspection positions, the second inductor (80) is installed, the second level supporting leg (73) of described multistage supporting leg (70) is provided with the second detection device (90) for detecting described second inductor (80).
12. controlling methods according to claim 11, it is characterized in that, described controlling method also comprises: the information sent according to described first detection device (20) and described second detection device (90) judges the telescopic location of described multistage supporting leg (70), to control the action of described second selector valve (40).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310255809.4A CN103307050B (en) | 2013-06-25 | 2013-06-25 | Multi-stage support leg hydraulic control system and control method of multi-stage support leg hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310255809.4A CN103307050B (en) | 2013-06-25 | 2013-06-25 | Multi-stage support leg hydraulic control system and control method of multi-stage support leg hydraulic system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103307050A CN103307050A (en) | 2013-09-18 |
| CN103307050B true CN103307050B (en) | 2016-02-24 |
Family
ID=49132633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310255809.4A Active CN103307050B (en) | 2013-06-25 | 2013-06-25 | Multi-stage support leg hydraulic control system and control method of multi-stage support leg hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103307050B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103587509B (en) * | 2013-11-21 | 2016-04-06 | 三一汽车制造有限公司 | A kind of supporting leg and pump truck |
| CN107859664B (en) * | 2017-11-10 | 2019-07-16 | 湖南中天意成机械有限公司 | Walking and support oil cylinder linkage |
| CN109595129B (en) * | 2018-12-13 | 2024-07-05 | 北京金风科创风电设备有限公司 | Impeller locking hydraulic system and wind generating set |
| CN111878476A (en) * | 2020-07-30 | 2020-11-03 | 三一重工股份有限公司 | Support leg hydraulic control system and work vehicle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201458608U (en) * | 2009-05-26 | 2010-05-12 | 长治清华机械厂 | Hydraulic cylinder of leg automatic-turning device |
| CN201475075U (en) * | 2009-08-20 | 2010-05-19 | 陈桂晖 | Double-cylinder hydraulic controller |
| CN202215520U (en) * | 2011-08-24 | 2012-05-09 | 徐州海伦哲专用车辆股份有限公司 | Control system for extending sequence of extending arm |
| CN202883526U (en) * | 2012-10-09 | 2013-04-17 | 三一重工股份有限公司 | Hydraulic system and hydraulic control device and crane |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5861379A (en) * | 1981-10-02 | 1983-04-12 | Mitsubishi Electric Corp | Hydraulic control valve |
-
2013
- 2013-06-25 CN CN201310255809.4A patent/CN103307050B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201458608U (en) * | 2009-05-26 | 2010-05-12 | 长治清华机械厂 | Hydraulic cylinder of leg automatic-turning device |
| CN201475075U (en) * | 2009-08-20 | 2010-05-19 | 陈桂晖 | Double-cylinder hydraulic controller |
| CN202215520U (en) * | 2011-08-24 | 2012-05-09 | 徐州海伦哲专用车辆股份有限公司 | Control system for extending sequence of extending arm |
| CN202883526U (en) * | 2012-10-09 | 2013-04-17 | 三一重工股份有限公司 | Hydraulic system and hydraulic control device and crane |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103307050A (en) | 2013-09-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103307050B (en) | Multi-stage support leg hydraulic control system and control method of multi-stage support leg hydraulic system | |
| CN103423221B (en) | Multi-oil-cylinder sequence telescopic hydraulic system and engineering machinery | |
| CN106382389B (en) | A kind of guide's oil circuit control switching valve and its working method | |
| CN202971412U (en) | Integrated miniature electro-hydraulic actuator | |
| CN103806498B (en) | Excavator hydraulic system | |
| CN106704313A (en) | Rotary drilling rig, mast hydraulic control system and mast lifting up/ down control method | |
| CN107215829A (en) | A kind of electri forklift operation control system | |
| CN103010976B (en) | Hydraulic system for controlling oil cylinders to sequentially stretch, horizontal supporting leg system and engineering machinery | |
| CN104088827B (en) | Bridge of boats springboard hydraulic pressure turn-over device | |
| CN202215520U (en) | Control system for extending sequence of extending arm | |
| CN201943569U (en) | Rotary drilling rig power head system with function of multistage torque control | |
| CN203035635U (en) | Multiple-reversing-valve paralleled air control device | |
| CN110094378B (en) | Multi-foot walking device function interlocking type electrohydraulic control equipment and method | |
| CN205527441U (en) | Flexible hydraulic system of multisection arm and hoist | |
| CN204356831U (en) | A kind of underground carry scraper work remote control hydraulic system | |
| CN104179460B (en) | The tower frame lifting device of rotary drill | |
| CN103057526B (en) | Hydraulic system for controlling synchronous support of multiple support legs and engineering vehicle | |
| CN203602242U (en) | Movable supporting leg control system and tire crane | |
| CN106761660B (en) | Automatic retraction control system and control method for rock drill | |
| CN205478140U (en) | Reciprocating type simplex pump of hydraulic pressure repulsive -type maglev | |
| CN201924687U (en) | Electric control lock | |
| CN202627041U (en) | Bucket arm cylinder regenerating unit and excavator | |
| CN104591011A (en) | Crane jib switching valve, hydraulic control system and engineering machinery | |
| CN206156631U (en) | Flexible arm caterpillar crane hydraulic control return circuit | |
| CN105649911A (en) | Hydraulic pushing reciprocating single-cylinder pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 410007 Yuelu District, Hunan, silver basin Road, No. 361, No. Applicant after: ZOOMLION HEAVY INDUSTRY SCIENCE&TECHNOLOGY Co.,Ltd. Address before: 410007 ZOOMLION grand pond Industrial Park, Yuanda Road, Changsha economic and Technological Development Zone, Changsha, Hunan 2, China Applicant before: ZOOMLION HEAVY INDUSTRY SCIENCE&TECHNOLOGY Co.,Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |