CN103010976B - Hydraulic system for controlling oil cylinders to sequentially stretch, horizontal supporting leg system and engineering machinery - Google Patents
Hydraulic system for controlling oil cylinders to sequentially stretch, horizontal supporting leg system and engineering machinery Download PDFInfo
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- CN103010976B CN103010976B CN201210548226.6A CN201210548226A CN103010976B CN 103010976 B CN103010976 B CN 103010976B CN 201210548226 A CN201210548226 A CN 201210548226A CN 103010976 B CN103010976 B CN 103010976B
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- 238000010276 construction Methods 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 222
- 238000000034 method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 210000001138 tear Anatomy 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The invention discloses a hydraulic system for controlling sequential extension of oil cylinders, a horizontal support leg system and engineering machinery. And in a horizontal leg system, a first control valve block is fixedly mounted on the base leg. Therefore, the second oil cylinder is only connected with the first oil cylinder through a pipeline and is not required to be connected with the first control valve group through a pipeline, no matter how the installation mode of the second oil cylinder is, no pipeline relative movement exists between the second oil cylinder and the first control valve group, and the pipeline arrangement of the whole horizontal supporting leg is facilitated.
Description
Technical field
The present invention relates to the field controlling oil cylinder sequential telescopic, particularly, relate to a kind of hydraulic efficiency pressure system controlling oil cylinder sequential telescopic, use the horizontal support legs system of this hydraulic efficiency pressure system and use the construction machinery and equipment of this horizontal support legs system.
Background technology
The large-scale engineering machineries such as car hosit all can adopt supporting leg to play effects such as increasing Area of bearing, to make its medium operation safer when operation.Wherein this type of supporting leg usually comprises multi-stage expansion horizontal support legs and is positioned at the vertical leg of horizontal support legs end, and wherein the structure of horizontal extension supporting leg is directly connected to operational capability and the use safety of the construction machinery and equipments such as hoisting crane.Wherein in motion, horizontal support legs will be retracted, to meet road running requirement; And when operation, in order to realize span and the rigidity of larger cross-tie, ensureing the complete machine stability during operations such as lift heavy, horizontal support legs will stretch out to increase Area of bearing.Car hosit, in order to obtain larger supporting leg span, generally has multi-stage expansion supporting leg, and according to working space restriction, car hosit generally has horizontal support legs and entirely stretches operating mode and partly stretch operating mode.
Wherein horizontal support legs be generally box-structure and mutual sheathing together, to stretch horizontal support legs structure for secondary, wherein Primary plateaus supporting leg can relative to basic supporting leg (or vehicle frame) horizontal extension, and power relative to Primary plateaus supporting leg horizontal extension, and can be delivered on ground by the vertical leg being positioned at secondary horizontal support legs end by secondary horizontal support legs.In order to ensure horizontal support legs intensity when partly stretching operating mode, normally by the oil cylinder of Primary plateaus supporting leg, Primary plateaus supporting leg is stretched out completely, now because secondary horizontal support legs is still fitted together with Primary plateaus leg sleeve, when therefore can ensure partly to stretch operating mode, the intensity of horizontal support legs system, thus improve the operation intensity such as lifting.In order to realize above-mentionedly partly stretching operating mode, this just requires to drive the driving oil cylinders at different levels of horizontal support legs system to carry out sequential telescopic, and does not carry out synchronization telescope.It is flexible that so-called sequential telescopic is that multi-stage oil cylinder carries out priority in order, such as horizontal support legs system partly stretch operating mode time, the driving oil cylinder of Primary plateaus supporting leg is needed first to be stretched out by Primary plateaus supporting leg, if now needing to enter stretches operating mode entirely, then by the driving oil cylinder of secondary horizontal support legs, secondary horizontal support legs is stretched out again, then contrary when retracting, namely first retraction secondary horizontal support legs at retraction Primary plateaus supporting leg.
At present, in order to meet the fluid control of above-mentioned driving oil cylinder, in hydraulic efficiency pressure system in the prior art, such as publication number is the hydraulic efficiency pressure system disclosed in the Chinese invention patent application of CN 102303813A, normally two-level oil cylinder is carried out oil cylinder parallel connection, and connect respectively by sequence valve, to realize sequential telescopic between rodless cavity and rod chamber.In this fashion, due to two oil cylinder parallel connections, rod chamber and rodless cavity are connected to sequence valve, need connecting line respectively, and two oil cylinders all need the main valve group that commutate flexible with control to be connected by pipeline, to realize oil-feed and the oil return of two oil cylinders, Here it is makes in the motion process of supporting leg, the pipeline of the driving oil cylinder of secondary horizontal support legs will along with one-level movable supporting legs together crank motion, thus make the piping layout between secondary horizontal support legs and main valve group constant, it is very easily caused to be worn in supporting leg and to damage, affect safety.For this, in the prior art, drag chain or hose reel can be adopted to arrange pipeline, but due to the intrasystem supporting leg limited space of horizontal support legs, cause the difficult arrangement of drag chain and hose reel, can not address this problem well.
Summary of the invention
An object of the present invention is to provide a kind of hydraulic efficiency pressure system controlling oil cylinder sequential telescopic, this hydraulic efficiency pressure system is while realizing sequential telescopic, do not need the flexible main control valve commutated of the second oil cylinder and control to carry out pipeline to be connected, piping layout is convenient, reduces the possibility that pipeline is moved and weares and teares.
Another object of the present invention is to provide a kind of horizontal support legs system, this horizontal support legs system uses the hydraulic efficiency pressure system of control oil cylinder sequential telescopic provided by the invention, and can avoid when Primary plateaus landing leg stretching, the phenomenon that pipeline between second oil cylinder and the flexible main control valve commutated of control moves and weares and teares occurs, and piping layout is convenient.
Another object of the present invention is to provide a kind of construction machinery and equipment, and this project machinery uses horizontal support legs system provided by the invention.
To achieve these goals, according to an aspect of the present invention, a kind of hydraulic efficiency pressure system controlling oil cylinder sequential telescopic is provided, wherein, described hydraulic efficiency pressure system comprises the first oil cylinder, second oil cylinder, first control cock group and the second control cock group, described first oil cylinder comprises the first rodless cavity and the first rod chamber, described second oil cylinder comprises the second rodless cavity and the second rod chamber, described first control cock group is connected on in-line and oil return line, and be communicated with described first rodless cavity by the first working oil path, be communicated with described first rod chamber by the second working oil path, described second control cock group is connected between described first oil cylinder and described second oil cylinder, can by described first oil cylinder oil inlet and oil return to control described second oil cylinder, wherein, by the control of described first control cock group and described second control cock group, first oil cylinder and described second oil cylinder can carry out sequential telescopic.
Preferably, described first control cock group comprises main reversing valve and switch valve, described first working oil path is communicated with described main reversing valve and described first rodless cavity, described second working oil path is communicated with described main reversing valve and described first rod chamber, and described switch valve is serially connected in described second working oil path, described second control cock group comprises check valve and sequence valve, and described first rodless cavity is communicated with described second rod chamber by the 3rd working oil path, described first rod chamber is communicated with described second rodless cavity by the 4th working oil path, wherein, described check valve is connected in described 4th working oil path and also fluid can be made to flow to described first oil cylinder from described second oil cylinder, described sequence valve is connected between described 3rd working oil path and described 4th working oil path, and the oil-feed side of this sequence valve is connected in described 3rd working oil path, fuel-displaced side is connected to described 4th working oil path of the oil-feed side being arranged in described check valve, and the setting pressure of described sequence valve is greater than the pressure of the first rodless cavity described in when described first oil cylinder stretches out.
Preferably, described main reversing valve is three-position four-way electromagnetic directional valve, and described switch valve is bi-bit bi-pass solenoid directional control valve.
According to a further aspect in the invention, a kind of horizontal support legs system is provided, this leg system comprises basic supporting leg, Primary plateaus supporting leg and secondary horizontal support legs, described secondary horizontal support legs can relative to described Primary plateaus supporting leg parallel motion, described Primary plateaus supporting leg can relative to described basic supporting leg parallel motion, wherein, described horizontal support legs system comprises the hydraulic efficiency pressure system of liquefaction cylinder sequential telescopic provided by the invention, wherein, described first oil cylinder is connected between described basic supporting leg and described Primary plateaus supporting leg, described second oil cylinder is connected between described Primary plateaus supporting leg and described secondary horizontal support legs, and described first control cock group is fixedly mounted on described basic supporting leg.
Preferably, described first oil cylinder comprises the first cylinder barrel and first piston bar, and described first cylinder barrel is fixed on described Primary plateaus supporting leg, and described first piston bar is fixed on described basic supporting leg.
Preferably, described first working oil path comprises first flow, described second oil circuit comprises the second runner, described first flow is formed in described first piston bar inside and extends to described first rodless cavity from the end of this first piston bar, and described second runner is formed in shown first piston bar inside and extends to described first rod chamber from this end.
Preferably, described second oil cylinder comprises the second cylinder barrel and the second piston rod, described second cylinder barrel is fixed on described Primary plateaus supporting leg, described second piston rod is fixed on described secondary horizontal support legs, and described second control cock group is fixedly mounted on described Primary plateaus supporting leg or on described second cylinder barrel.
In accordance with a further aspect of the present invention, provide a kind of construction machinery and equipment, this project machinery comprises horizontal support legs system, it is characterized in that, described horizontal support legs system is horizontal support legs system provided by the invention.
Preferably, described construction machinery and equipment is hoisting crane.
Pass through technique scheme, hydraulic efficiency pressure system provided by the invention is while the sequential telescopic that can realize the first oil cylinder and the first oil cylinder, because the second oil cylinder can carry out oil-feed and oil return by means of only the first oil cylinder, namely this second oil cylinder is only connected with the first oil cylinder generation pipeline, and do not need and control flexible the first control cock group generation pipeline commutated and be connected, therefore facilitate piping layout.And in horizontal support legs system provided by the invention, because the first control cock group is fixed on basic supporting leg, therefore when Primary plateaus supporting leg moves, regardless of the mounting means of the second oil cylinder, pipeline relative movement and wearing and tearing are not all had between second oil cylinder and the first control cock group, therefore, the piping layout of integral level supporting leg is facilitated.
Other features and advantages of the present invention are described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification sheets, is used from explanation the present invention, but is not construed as limiting the invention with detailed description of the invention one below.In the accompanying drawings:
Fig. 1 is the structure principle chart of the hydraulic efficiency pressure system of the control oil cylinder sequential telescopic that the preferred embodiment for the present invention provides;
Fig. 2 is the structural representation of the horizontal support legs system that the preferred embodiment for the present invention provides;
Fig. 3 is the local structure cross-sectional schematic of the horizontal support legs system that the preferred embodiment for the present invention provides.
Description of reference numerals
1 first oil cylinder 2 second oil cylinder
3 main reversing valve 4 check valves
5 sequence valve 6 switch valves
7 basic supporting leg 8 Primary plateaus supporting legs
9 secondary horizontal support legs
11 first rodless cavity 12 first rod chambers
13 first cylinder barrel 14 first piston bars
15 first flow 21 second rodless cavities
22 second rod chamber 23 second cylinder barrels
24 second piston rod 16 second runners
A first working oil path B second working oil path
C the 3rd working oil path D the 4th working oil path
P in-line T oil return line
X first control cock group Y second control cock group
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, detailed description of the invention described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
First it should be noted that, the oil cylinder sequential telescopic that the present invention relates in Hydraulic Field controls, wherein those skilled in the art it is understood that, mentioned " in-line P, oil return line T and first, second, third and fourth working oil path A, B, C, D " etc. " oil circuit " can be realized by pipeline, also can by the runner realization etc. of components interior, in addition in extension and contraction control hydraulic efficiency pressure system, the main control valve that main reversing valve etc. controls flexible commutation all can be set, by the commutation of this main reversing valve, the hydraulic ram connected by working oil path can be made to realize flexible commutation, wherein only need to mention that it comprises in-line P and oil return line T, those skilled in the art can expect Hydraulic Pump naturally, fuel tank, the conventional structures such as by pass valve, and without the need to repeating.
The hydraulic efficiency pressure system of control oil cylinder sequential telescopic provided by the invention is introduced below for the horizontal support legs system provided by the invention that can be applied in the construction machinery and equipments such as such as hoisting crane provided by the invention, it should be noted that, this hydraulic efficiency pressure system can also be used in other occasions needing sequential telescopic, such as also can be applicable in the telescopic jib of the construction machinery and equipments such as hoisting crane, now only leg aspect of the present invention need be replaced by corresponding arm to save, the change of the application therefore can expected for this kind of those skilled in the art, all should drop in protection scope of the present invention.
As shown in Figure 2, the invention provides a kind of horizontal support legs system, comprise basic supporting leg 7, Primary plateaus supporting leg 8 and secondary horizontal support legs 9, secondary horizontal support legs 9 can relative to Primary plateaus supporting leg 8 parallel motion, Primary plateaus supporting leg 8 can relative to basic supporting leg 7 parallel motion, particularly, above-mentioned supporting leg all can adopt box-structure to realize, wherein in a preferred embodiment of the invention, basic supporting leg 7 is sleeved on outside Primary plateaus supporting leg 8, secondary horizontal support legs 9 is then sleeved in Primary plateaus supporting leg 8, and Primary plateaus supporting leg 8 and secondary horizontal support legs 9 are all by driving oil cylinder to carry out telescopic drive accordingly, particularly, the first oil cylinder be connected between basic supporting leg 7 and Primary plateaus supporting leg 8 is set, stretch relative to basic supporting leg 7 to drive Primary plateaus supporting leg 8, and the second oil cylinder be connected between Primary plateaus supporting leg 8 and secondary horizontal support legs 9 is set, stretch relative to Primary plateaus supporting leg 8 to drive secondary horizontal support legs 9.
Wherein, in order to realize horizontal support legs system, there is entirely stretching operating mode and partly stretching operating mode as described in the background art, namely the first oil cylinder 1 and the second oil cylinder 2 can sequential telescopic, as shown in Figure 1, present invention also offers a kind of hydraulic efficiency pressure system controlling oil cylinder sequential telescopic, this hydraulic efficiency pressure system, except comprising the first oil cylinder 1 second oil cylinder 2, also comprises the first control cock group X and the second control cock group Y.Well known, first oil cylinder 1 comprises the first rodless cavity 11 and the first rod chamber 12, second oil cylinder 2 comprises the second rodless cavity 21 and the second rod chamber 22, wherein, this first control cock group X is connected on in-line P and oil return line T, and is communicated with the first rodless cavity 11 by the first working oil path A, is communicated with the first rod chamber 12 by the second working oil path B, namely this first control cock group X can realize the function of the flexible commutation of control first oil cylinder 1, also can be described as main control valve.Therefore, conveniently control this hydraulic efficiency pressure system, this first control cock group X is preferably mounted in (not shown) on basic supporting leg 7 or vehicle frame, that is, be arranged on the outside of horizontal support legs system.
Wherein importantly, no matter because the second oil cylinder 2 is so that how mode is connected between Primary plateaus supporting leg 8 and secondary horizontal support legs 9, in the telescopic process of Primary plateaus supporting leg 8, this second oil cylinder 2 all can be moved, therefore, if the sequential telescopic adopting hydraulic efficiency pressure system of the prior art to carry out oil cylinder controls, the pipeline between the second oil cylinder 2 and the first control cock group X will be caused to move, thus cause pipeline wear and tear and bring installation hidden danger.In order to realize object of the present invention, in the present invention, have employed the mode that the second oil cylinder 2 does not need to be connected with the first control cock group generation pipeline as main control valve, therefore, it is possible to overcome the problems of the prior art.Particularly, the technological means of employing of the present invention is, second control cock group Y is connected between the first oil cylinder 1 and the second oil cylinder 2, can by the first oil cylinder 1 oil-feed and oil return to control the second oil cylinder 2, and, by the control of the first control cock group X and the second control cock group Y, the first oil cylinder 1 and the second oil cylinder 2 can carry out sequential telescopic.Therefore due to the existence of the second control cock group X, coordinate the control of the first control cock group again, the present invention, while the sequential telescopic that can realize the first oil cylinder 1 and the second oil cylinder 2, avoids the pipeline between the second oil cylinder 2 and the first valve group X brought due to the flexible of Primary plateaus supporting leg 8 and moves and wear and tear.
It should be noted that, the embodiment that can complete technique scheme has multiple, the structure of such as the first control cock group and the second control cock group and control logic etc., the present invention for convenience of description, in this introduction preferred implementation wherein, this preferred implementation, only for illustration of the present invention, is not limited to the present invention.
In a preferred embodiment of the invention, first control cock group X provided by the invention comprises main reversing valve 3 and switch valve 6, first working oil path A is communicated with main reversing valve 3 and the first rodless cavity 11, second working oil path B is communicated with main reversing valve 3 and the first rod chamber 12, and switch valve 6 is serially connected on the second working oil path B.Wherein, main reversing valve 3 is for switching the connected relation of in-line P and oil return line T and the first oil cylinder, wherein the most a kind of preferred embodiment, this main reversing valve 3 be 3-position 4-way commutation solenoid directional control valve, well known, by electromagnet dead electricity, this main reversing valve 3 can be controlled in left position, switch between meta and right position, to realize stretching out and retracting of the first oil cylinder, wherein those skilled in the art can need the three position four-way directional control valve selecting different Median Function more, such as O type as shown in the figure.Wherein realizing the flexible of oil cylinder by change-over valve is known technology, does not do too much repeating at this.In addition, switch valve 6 is preferably bi-bit bi-pass solenoid directional control valve, and it has conducting and cut-off two kinds of operating modes, by the break-make of the gain and loss electric control second working oil path B of electromagnet, realizes following sequential telescopic process with auxiliary.
Simultaneously, second control cock group Y comprises check valve 4 and sequence valve 5, and the first rodless cavity 11 is communicated with the second rod chamber 22 by the 3rd working oil path C, first rod chamber 12 is communicated with the second rodless cavity 21 by the 4th working oil path D, wherein, check valve 4 is connected on the 4th working oil path D and also fluid can be made to flow to the first oil cylinder 1 from the second oil cylinder 2, sequence valve 5 is connected between the 3rd working oil path C and the 4th working oil path D, and the oil-feed side of this sequence valve 5 is connected on the 3rd working oil path C, fuel-displaced side is connected to the 4th working oil path D of the oil-feed side being arranged in check valve 4, and the setting pressure of sequence valve 5 is greater than the pressure of the first rodless cavity 11 when the first oil cylinder 1 stretches out.Wherein this sequence valve 5 can be preferably Direct Action Type internal control sequence valve.Certain those skilled in the art can also use guide type sequence valve to control, and the present invention does not limit this.
Being described below in detail in present embodiment is the sequential telescopic that how to realize the first oil cylinder 1 and the second oil cylinder 2.
As shown in Figure 1, in specific works process, when needs first oil cylinder 1 and the second oil cylinder 2 order are stretched out, the main reversing valve first in the first control cock group X is switched to right position from meta, and switch valve 6 to control the second working oil path B through-flow.Now, by the first working oil path A, pressure oil in in-line P can enter in the first rodless cavity 11 of the first oil cylinder 1, and this pressure oil also enters in the second rod chamber 22 of the second oil cylinder 2 by the 3rd working oil path C, now because pressure does not reach the setting pressure of sequence valve 5, therefore pressure oil cannot enter in the second rodless cavity 21 of the second oil cylinder 2, and now, the first rod chamber 12 of the first oil cylinder 1 can by the second working oil path B to oil return in oil return line T.Therefore, under the effect of pressure oil, driving Primary plateaus supporting leg 8 stretches out by the first oil cylinder 1 from basic supporting leg 7.After the first piston bar 14 of the first oil cylinder 1 stretches out completely, main control valve 3 switches back meta, now realizes partly stretching operating mode.
Then, when continuing needs second oil cylinder 2 and driving secondary horizontal support legs 9 to stretch out from Primary plateaus supporting leg, then continue to be switched to right position by main reversing valve 2, make in-line P provide pressure oil for the first working oil path A, and by switch valve 6, second working oil path B is disconnected.At this moment because the first piston bar 14 of the first oil cylinder 1 reaches dead center position, and the second piston rod 24 of the second oil cylinder 2 is in the dead center position of retraction, thus pressure oil can build the pressure in the first rodless cavity 11 and the second rod chamber 22, at this moment the pressure in the 3rd working oil path C by reach sequence valve 5 setting pressure, therefore sequence valve 5 conducting, pressure oil will enter in the 4th working oil path D, now because the second working oil path B is disconnected by switch valve 6, this pressure oil is not by the second working oil path B oil return, therefore be merely able to enter in the second rodless cavity 21 of the second oil cylinder 2, although also there is the pressure oil of uniform pressure in the second rod chamber 22 of at this moment the second oil cylinder 2, but because in rodless cavity, the area of thrust surface of piston rod are greater than the area of thrust surface of piston rod in rod chamber, second piston rod 24 that therefore can promote the second oil cylinder 2 equally stretches out from the second cylinder barrel 23, fluid now in the second rod chamber 22 will enter in the second rodless cavity 12 by sequence valve 5 when being pushed out again, namely self oil circulation of the second oil cylinder 2 can be realized, thus the second oil cylinder 2 can be realized drive secondary horizontal support legs 9 to stretch out from Primary plateaus supporting leg 8, after the second piston rod 24 stretches out completely, main valve switches back meta, namely realize entirely stretching operating mode.
Then, when needs second oil cylinder 2 and the first oil cylinder 1 order are retracted, when namely first needing the second oil cylinder 2 to drive secondary horizontal support legs 9 to retract in Primary plateaus supporting leg 8, then be switched to right position equally by main reversing valve 2, in-line P is made to provide pressure oil for the first working oil path A, and by actuating switch valve 6, to recover through-flow for the second working oil path B.At this moment because first piston bar 14 and the second piston rod 24 all reach dead center position, thus the pressure oil entered in the second rod chamber 22 can not build the pressure, and the second piston rod 24 can be promoted retract, now because the pressure of the pressure oil of the 3rd working oil path C does not reach the setting pressure of sequence valve 5, therefore sequence valve 5 ends, pressure oil cannot enter in the 4th working oil path D, now because the second working oil path B is recovered through-flow by switch valve 6, this fluid therefore in the second rodless cavity 21 can to enter in the first rod chamber 12 of the first oil cylinder 1 and by the second working oil path B to oil return line T oil return by bucket the 4th working oil path D, therefore can the second piston rod 24 of the second oil cylinder 2 can retract in the second cylinder barrel 23, thus the second oil cylinder 2 can be realized drive secondary horizontal support legs 9 to retract in Primary plateaus supporting leg 8, when the second piston rod 24 is retracted completely, main reversing valve 3 switches back meta, to realize partly stretching operating mode.
Finally, when continuing to need Primary plateaus supporting leg 8 to be retracted in basic supporting leg 7, first need main reversing valve 3 to be switched to left position from meta, and switch valve 6 to control the second working oil path B through-flow.Now, by the second working oil path B, pressure oil in in-line P can enter in the first rod chamber 12 of the first oil cylinder 1, due to the existence of check valve 4, this pressure oil can not enter in the second oil cylinder 2 by the 4th working oil path D, now, the first rodless cavity 12 of the first oil cylinder 1 can by the first working oil path A to oil return in oil return line T.Therefore, under the effect of pressure oil, the first oil cylinder 1 will drive Primary plateaus supporting leg 8 to retract in basic supporting leg 7, when first piston bar 14 is retracted completely, namely realize partly stretching operating mode.
The above-mentioned hydraulic efficiency pressure system described in detail by providing in the preferred embodiment for the present invention realizes the sequential telescopic of the first oil cylinder 1 and the second oil cylinder 2; wherein those skilled in the art can continue various change and replacement to this preferred implementation; as long as can realize object of the present invention, this type of changes and replacement all should drop in protection scope of the present invention.
Get back in the structural arrangement of horizontal support legs system provided by the invention, wherein the concrete arrangement of the present invention's preferred implementation body as shown in figures 1 and 3 can realize except not having pipeline between the second oil cylinder 2 and the first control cock group X and moving, can also ensure do not have pipeline to move between the first valve group X and the first oil cylinder 1, and not have pipeline to move between the first oil cylinder 1 and the second oil cylinder 2.
Wherein particularly, the first cylinder barrel 13 of the first oil cylinder 1 is fixed on Primary plateaus supporting leg 8, and first piston bar 14 is fixed on basic supporting leg 7.And preferably, the second cylinder barrel 23 of the second oil cylinder 2 is fixed on Primary plateaus supporting leg 8, and the second piston rod 24 is fixed on secondary horizontal support legs 9.That is, drive in the process of corresponding horizontal support legs at the first oil cylinder 1 and the second oil cylinder 2, the relative position of the cylinder barrel of the two is constant, and only by the driving of the corresponding horizontal support legs of flexible realization of corresponding piston rod.
Based on this arrangement structure, because the cylinder barrel of the first oil cylinder 1 and the second oil cylinder 2 is all arranged on the first horizontal support legs 8, and the pipeline between the first oil cylinder 1 and the second oil cylinder 2 is all realized by the cylinder barrel of the two, therefore, pipeline between the first above-mentioned oil cylinder 1 and the second oil cylinder 2 all can be able to be arranged on the first horizontal support legs, that is, can the second control cock group Y be also fixedly mounted in Primary plateaus supporting leg 8, can be fixed on particularly on Primary plateaus supporting leg 8 or on the second cylinder barrel 23.Thus the pipeline realized between the first oil cylinder 1 and the second oil cylinder 2 is without relative movement, and convenient layout.Now the check valve that comprises of the second control cock group Y and sequence valve all do not need peripheral operation to control, and therefore without the need to arranging control path, make horizontal support legs system effect provided by the invention better yet.
In addition, what needs introduced is, in order to realize not having pipeline relative movement between the first oil cylinder 1 and the first control cock group X, the first piston bar 14 of the first oil cylinder 1 as the passage being communicated with rod chamber and rodless cavity, and to be communicated with without the need to using pipeline to pass through the first cylinder barrel 13 by the invention.Make when Primary plateaus supporting leg moves, between the first cylinder barrel 13 be located thereon and the first control cock group X, pipeline is not set, so there is no pipeline and relatively use.Namely, in horizontal support legs system provided by the invention, first working oil path A comprises first flow 15, second oil circuit B comprises the second runner 16, first flow 15 is formed in first piston bar 14 inside and extends to the first rodless cavity 11, second runner 14 from the end of this first piston bar 13 and is formed in shown first piston bar 14 inside and extends to the first rod chamber 12 from this end.Therefore, because the end winding support of first piston bar 14 is on basic supporting leg 7, and the first control cock group X is also fixed on basic supporting leg 7, therefore the motion of Primary plateaus supporting leg cannot have influence on the pipeline between first piston bar 14 end and the first control cock group X, and the pipeline therefore avoided between the first oil cylinder 1 and the first control cock group X moves.Make the horizontal support legs system effect provided of the present invention better, practicality is stronger.
To sum up, horizontal support legs system in the preferred embodiment for the present invention can avoid the relative movement of the pipeline between associated components completely, greatly facilitate the layout of pipeline, and the sequential telescopic of Primary plateaus supporting leg and secondary horizontal support legs can be completed, complete and entirely stretch operating mode and partly stretch operating mode.Therefore, the hydraulic efficiency pressure system of control oil cylinder sequential telescopic provided by the invention, the construction machinery and equipment of horizontal support legs system and preferably hoisting crane all has higher practicality and promotional value.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible array mode.
In addition, also can carry out combination in any between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (5)
1. one kind controls the hydraulic efficiency pressure system of oil cylinder sequential telescopic, it is characterized in that, described hydraulic efficiency pressure system comprises the first oil cylinder (1), second oil cylinder (2), first control cock group (X) and the second control cock group (Y), described first oil cylinder (1) comprises the first rodless cavity (11) and the first rod chamber (12), described second oil cylinder (2) comprises the second rodless cavity (21) and the second rod chamber (22), described first control cock group (X) is connected on in-line (P) and oil return line (T), and be communicated with described first rodless cavity (11) by the first working oil path (A), be communicated with described first rod chamber (12) by the second working oil path (B), described second control cock group (Y) is connected between described first oil cylinder (1) and described second oil cylinder (2), can by described first oil cylinder (1) oil-feed and oil return to control described second oil cylinder (2), wherein, by the control of described first control cock group (X) and described second control cock group (Y), first oil cylinder (1) and described second oil cylinder (2) can carry out sequential telescopic,
Wherein, described first control cock group (X) comprises main reversing valve (3) and switch valve (6), described first working oil path (A) is communicated with described main reversing valve (3) and described first rodless cavity (11), described second working oil path (B) is communicated with described main reversing valve (3) and described first rod chamber (12), and described switch valve (6) is serially connected on described second working oil path (B)
Described second control cock group (Y) comprises check valve (4) and sequence valve (5), and described first rodless cavity (11) is communicated with described second rod chamber (22) by the 3rd working oil path (C), described first rod chamber (12) is communicated with described second rodless cavity (21) by the 4th working oil path (D), wherein, described check valve (4) is connected to described 4th working oil path (D) above also can make fluid flow to described first oil cylinder (1) from described second oil cylinder (2), described sequence valve (5) is connected between described 3rd working oil path (C) and described 4th working oil path (D), and the oil-feed side of this sequence valve (5) is connected in described 3rd working oil path (C), fuel-displaced side is connected to described 4th working oil path (D) of the oil-feed side being arranged in described check valve (4), and the setting pressure of described sequence valve (5) is greater than the pressure of the first rodless cavity (11) described in when described first oil cylinder (1) is stretched out.
2. hydraulic efficiency pressure system according to claim 1, is characterized in that, described main reversing valve (3) is three-position four-way electromagnetic directional valve, and described switch valve (6) is bi-bit bi-pass solenoid directional control valve.
3. a horizontal support legs system, this leg system comprises basic supporting leg (7), Primary plateaus supporting leg (8) and secondary horizontal support legs (9), described secondary horizontal support legs (9) can relative to described Primary plateaus supporting leg (8) parallel motion, described Primary plateaus supporting leg (8) can relative to described basic supporting leg (7) parallel motion, it is characterized in that, described horizontal support legs system comprises the hydraulic efficiency pressure system of the control oil cylinder sequential telescopic in claim 1-2 described in any one;
Wherein, described first oil cylinder (1) is connected between described basic supporting leg (7) and described Primary plateaus supporting leg (8), described second oil cylinder (2) is connected between described Primary plateaus supporting leg (8) and described secondary horizontal support legs (9), and described first control cock group (X) is fixedly mounted on described basic supporting leg (7); Described second oil cylinder (2) comprises the second cylinder barrel (23) and the second piston rod (24), described second cylinder barrel (23) is fixed on described Primary plateaus supporting leg (8), described second piston rod (24) is fixed on described secondary horizontal support legs (9), and described second control cock group (Y) is fixedly mounted on described Primary plateaus supporting leg (8) or on described second cylinder barrel (23);
Wherein, described first oil cylinder (1) comprises the first cylinder barrel (13) and first piston bar (14), described first cylinder barrel (13) is fixed on described Primary plateaus supporting leg (8), and described first piston bar (14) is fixed on described basic supporting leg (7);
Described first working oil path (A) comprises first flow (15), described second oil circuit (B) comprises the second runner (16), described first flow (15) is formed in described first piston bar (14) inside and extends to described first rodless cavity (11) from the end of this first piston bar (14), and described second runner (16) is formed in shown first piston bar (14) inside and extends to described first rod chamber (12) from this end.
4. a construction machinery and equipment, this project machinery comprises horizontal support legs system, it is characterized in that, described horizontal support legs system is horizontal support legs system according to claim 3.
5. construction machinery and equipment according to claim 4, is characterized in that, described construction machinery and equipment is hoisting crane.
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| CN201210548226.6A CN103010976B (en) | 2012-12-17 | 2012-12-17 | Hydraulic system for controlling oil cylinders to sequentially stretch, horizontal supporting leg system and engineering machinery |
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| CN201210548226.6A CN103010976B (en) | 2012-12-17 | 2012-12-17 | Hydraulic system for controlling oil cylinders to sequentially stretch, horizontal supporting leg system and engineering machinery |
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| CN103010976B true CN103010976B (en) | 2014-12-24 |
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Families Citing this family (6)
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| CN103423221B (en) * | 2013-07-24 | 2015-10-28 | 三一汽车起重机械有限公司 | Multi-oil-cylinder sequence telescopic hydraulic system and engineering machinery |
| 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 |
| CN110985464B (en) * | 2019-12-30 | 2024-07-23 | 徐州海伦哲特种车辆有限公司 | Automatic interlocking control system for getting on and off overhead working truck and control method thereof |
| CN111140559B (en) * | 2020-01-08 | 2021-10-12 | 燕山大学 | Multi-section-arm sequential telescopic hydraulic system |
| CN112539415B (en) * | 2020-11-26 | 2024-07-12 | 哈尔滨通用液压机械制造有限公司 | Robot device for drawing out furnace |
| CN112797043B (en) * | 2021-02-01 | 2023-06-02 | 徐州徐工随车起重机有限公司 | Sequential telescopic cylinder, multi-cylinder sequential telescopic mechanism and crane |
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