CN106246621B - Hydraulic circuit and engineering machinery for engineering machinery - Google Patents

Hydraulic circuit and engineering machinery for engineering machinery Download PDF

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Publication number
CN106246621B
CN106246621B CN201610696126.6A CN201610696126A CN106246621B CN 106246621 B CN106246621 B CN 106246621B CN 201610696126 A CN201610696126 A CN 201610696126A CN 106246621 B CN106246621 B CN 106246621B
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China
Prior art keywords
hydraulic
hydraulic cylinder
valve
fluid port
manipulation
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CN106246621A (en
Inventor
居梦雄
廖启辉
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CHANGDE ZHONGLIAN ZHONGKE HYDRAULIC Co Ltd
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CHANGDE ZHONGLIAN ZHONGKE HYDRAULIC Co Ltd
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62Constructional features or details
    • B66C23/72Counterweights or supports for balancing lifting couples
    • B66C23/78Supports, e.g. outriggers, for mobile cranes
    • B66C23/80Supports, e.g. outriggers, for mobile cranes hydraulically actuated
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors

Abstract

Engineering machinery and its hydraulic circuit, including:Main reversing valve, there are the first and second actuator ports;Selector valve, there are selection oil inlet, the first and second selection hydraulic fluid ports, select oil inlet to be connected with the first actuator port and be communicated in the first or second selection hydraulic fluid port;First to fourth group of hydraulic cylinder, first choice hydraulic fluid port are respectively communicated with the rod chamber of each hydraulic cylinder in first and second groups of hydraulic cylinders, and the second selection hydraulic fluid port is respectively communicated with the rod chamber of each hydraulic cylinder in third and fourth group of hydraulic cylinder;N number of driven valve, include manipulation oil inlet, the first and second manipulation hydraulic fluid ports, manipulation oil inlet is selectively communicated in the first or second manipulation hydraulic fluid port, the manipulation oil inlet of each driven valve connects with the second actuator port, first manipulation hydraulic fluid port of n-th driven valve is communicated in the rodless cavity of first and the n-th hydraulic cylinder in the 3rd group of hydraulic cylinder, and the second manipulation hydraulic fluid port of n-th driven valve is communicated in the rodless cavity of n-th hydraulic cylinder in second and the 4th group of hydraulic cylinder.

Description

Hydraulic circuit and engineering machinery for engineering machinery
Technical field
The present invention relates to Hydraulic Field, in particular it relates to a kind of hydraulic circuit for being used for engineering machinery (system of such as getting off) And the engineering machinery including the hydraulic circuit.
Background technology
For engineering machinery (such as excavator, crane), the system of getting off especially is provided with the various branch as load Leg, to realize abundant support and protection to engineering machinery at work.Moreover, the action of numerous supporting legs generally requires individually to enter Row control.
There are a variety of hydraulic circuits for the load control design case for system of getting off in the prior art, it usually needs be each One driven valve of load configuration, separately to control the action each loaded, such as it is used for the stretching of the oil cylinder of supporting leg or returns Contracting.Therefore, when increasing load in the system of getting off, can only be realized by designing more driven valves, so as to cause valve road Structure is complicated all the more.On the one hand it is increasing that the volume for system control valve of getting off can be increased, cause difficulty in arrangement;The opposing party Face, the reliability and stability of system operation can be reduced.
In view of this, in numerous loads in face of being separately controlled, the behaviour for load how is reduced as far as The quantity of valve is controlled, turns into this area technical issues that need to address.
The content of the invention
It is an object of the invention to provide a kind of technical scheme, the technical scheme can be with relatively small number of driven valve come individually Control numerous hydraulic loads.
To achieve these goals, the present invention provides a kind of hydraulic circuit for engineering machinery, wherein, the hydraulic circuit Including:
Main reversing valve, the main reversing valve have the first actuator port and the second working oil for discharge pressure hydraulic oil Mouthful;
Selector valve, the selector valve have selection oil inlet, first choice hydraulic fluid port and the second selection hydraulic fluid port, the selection oil-feed Mouth connected with first actuator port and be selectively communicated in the first choice hydraulic fluid port or second select hydraulic fluid port;
First group of hydraulic cylinder is to the 4th group of hydraulic cylinder, and every group of hydraulic cylinder has N number of hydraulic cylinder, and N is non-zero natural number, described First choice hydraulic fluid port is respectively communicated with the rod chamber of each hydraulic cylinder in first group of hydraulic cylinder and second group of hydraulic cylinder, described Second selection hydraulic fluid port is respectively communicated with the rod chamber of each hydraulic cylinder in the 3rd group of hydraulic cylinder and the 4th group of hydraulic cylinder;
N number of driven valve, each driven valve include manipulation oil inlet, the first manipulation hydraulic fluid port and the second manipulation hydraulic fluid port, the behaviour Control oil inlet is selectively communicated in the first manipulation hydraulic fluid port or the second manipulation hydraulic fluid port, the manipulation oil inlet of each driven valve are equal Connected with second actuator port, the first manipulation hydraulic fluid port of n-th driven valve is communicated in first group of hydraulic cylinder and the 3rd Group hydraulic cylinder in n-th hydraulic cylinder rodless cavity, n-th driven valve second manipulation hydraulic fluid port be communicated in second group of hydraulic cylinder and The rodless cavity of n-th hydraulic cylinder in 4th group of hydraulic cylinder.
Present invention also offers a kind of hydraulic circuit for engineering machinery, wherein, the hydraulic circuit includes:
Main reversing valve, the main reversing valve have the first actuator port and the second working oil for discharge pressure hydraulic oil Mouthful;
Selector valve, the selector valve have selection oil inlet, first choice hydraulic fluid port and the second selection hydraulic fluid port, the selection oil-feed Mouth connected with first actuator port and be selectively communicated in the first choice hydraulic fluid port or second select hydraulic fluid port;
First group of hydraulic cylinder is to the 3rd group of hydraulic cylinder, and every group of hydraulic cylinder has N number of hydraulic cylinder, and N is non-zero natural number, described First choice hydraulic fluid port is respectively communicated with the rod chamber of each hydraulic cylinder in first group of hydraulic cylinder and second group of hydraulic cylinder, and described second Selection hydraulic fluid port is respectively communicated with the rod chamber of each hydraulic cylinder in the 3rd group of hydraulic cylinder;
N number of driven valve, each driven valve include manipulation oil inlet, the first manipulation hydraulic fluid port and the second manipulation hydraulic fluid port, the behaviour Control oil inlet is selectively communicated in the first manipulation hydraulic fluid port or the second manipulation hydraulic fluid port, the manipulation oil inlet of each driven valve are equal Connected with second actuator port, the first manipulation hydraulic fluid port of n-th driven valve is communicated in the N in first group of hydraulic cylinder The rodless cavity of individual hydraulic cylinder, the second manipulation hydraulic fluid port of n-th driven valve are communicated in second group of hydraulic cylinder and the 3rd group of hydraulic cylinder The rodless cavity of n-th hydraulic cylinder.
Preferably, the N is 2,3,4,5 or 6.
Preferably, the first actuator port of the main reversing valve is connected in series with hydraulic control one-way valve, the hydraulic control one-way valve Control terminal is connected to second actuator port.
Preferably, the second manipulation hydraulic fluid port of each driven valve is connected to overload valve by check valve respectively, the overload valve Control terminal is connected to first actuator port.
Preferably, the hydraulic cylinder is the load for system of being got off in engineering machinery.
In addition, present invention also offers a kind of engineering machinery, the engineering machinery is provided with above-mentioned liquid provided by the present invention Press oil road.
Preferably, the hydraulic cylinder is the load for system of being got off in engineering machinery.
Preferably, it is described to load each supporting leg for including the engineering machinery.
Preferably, the engineering machinery is crane.
Pass through above-mentioned technical proposal, due to the cooperation of selector valve and each driven valve, so as to realize to each hydraulic cylinder " second order " controls, and in the case of having N number of driven valve, because each selector valve has two valve positions, while each driven valve has two Individual valve position, therefore in the technical scheme of the application, at most can control 4*N hydraulic cylinder.Obviously than traditionally at most controllable 2*N The technical scheme of individual hydraulic cylinder has bigger capacity.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is for providing a further understanding of the present invention, and a part for constitution instruction, with following tool Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is to represent driven valve and the schematic diagram of selector valve annexation in the hydraulic circuit according to the present invention;
Fig. 2 and Fig. 3 is the schematic diagram according to the hydraulic circuit of the different preferred embodiments of the present invention respectively.
Description of reference numerals
Main reversing valve 10
First actuator port 11
Second actuator port 12
Selector valve 20
Select oil inlet 21
First choice hydraulic fluid port 22
Second selection hydraulic fluid port 23
Driven valve 30
Manipulate oil inlet 31
First manipulation hydraulic fluid port 32
Second manipulation hydraulic fluid port 33
Hydraulic control one-way valve D
Overload valve PR
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched The embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
As depicted in figs. 1 and 2, the invention discloses the hydraulic circuit for engineering machinery, the hydraulic circuit to include:
Main reversing valve 10, the main reversing valve 10 have the first actuator port 11 and second for discharge pressure hydraulic oil P Actuator port 12;
There is selection oil inlet 21, first choice hydraulic fluid port 22 and second to select hydraulic fluid port 23, institute for selector valve 20, the selector valve 20 Selection oil inlet 21 is stated to connect with first actuator port 11 and be selectively communicated in the first choice hydraulic fluid port 22 or the Two selection hydraulic fluid ports 23;
First group of hydraulic cylinder is to the 4th group of hydraulic cylinder, and every group of hydraulic cylinder has N number of hydraulic cylinder, and N is non-zero natural number, described First choice hydraulic fluid port 22 is respectively communicated with the rod chamber of each hydraulic cylinder in first group of hydraulic cylinder and second group of hydraulic cylinder, institute State the rod chamber that the second selection hydraulic fluid port 23 is respectively communicated with each hydraulic cylinder in the 3rd group of hydraulic cylinder and the 4th group of hydraulic cylinder;
N number of driven valve 30, N are non-zero natural number, and each driven valve 30 includes manipulation oil inlet 31, first and manipulates hydraulic fluid port 32 With the second manipulation hydraulic fluid port 33, the manipulation oil inlet 31 is selectively communicated in the first manipulation hydraulic fluid port 32 or second manipulation oil Mouth 33, the manipulation oil inlet 31 of each driven valve 30 connects with second actuator port 12, and the first of n-th driven valve 30 Manipulation hydraulic fluid port 32 is communicated in the rodless cavity of first group of hydraulic cylinder and the n-th hydraulic cylinder in the 3rd group of hydraulic cylinder, n-th behaviour Second manipulation hydraulic fluid port 33 of control valve 30 is communicated in the rodless cavity of n-th hydraulic cylinder in second group of hydraulic cylinder and the 4th group of hydraulic cylinder.
As shown in figures 1 and 3, the invention discloses the hydraulic circuit for engineering machinery, the hydraulic circuit to include:
Main reversing valve 10, the main reversing valve 10 have the first actuator port 11 and second for discharge pressure hydraulic oil P Actuator port 12;
There is selection oil inlet 21, first choice hydraulic fluid port 22 and second to select hydraulic fluid port 23, institute for selector valve 20, the selector valve 20 Selection oil inlet 21 is stated to connect with first actuator port 11 and be selectively communicated in the first choice hydraulic fluid port 22 or the Two selection hydraulic fluid ports 23;
First group of hydraulic cylinder is to the 3rd group of hydraulic cylinder, and every group of hydraulic cylinder has N number of hydraulic cylinder, and N is non-zero natural number, described First choice hydraulic fluid port 22 is respectively communicated with the rod chamber of each hydraulic cylinder in first group of hydraulic cylinder and second group of hydraulic cylinder, and described Two selection hydraulic fluid ports 23 are respectively communicated with the rod chamber of each hydraulic cylinder in the 3rd group of hydraulic cylinder;
N number of driven valve 30, N are non-zero natural number, and each driven valve 30 includes manipulation oil inlet 31, first and manipulates hydraulic fluid port 32 With the second manipulation hydraulic fluid port 33, the manipulation oil inlet 31 is selectively communicated in the first manipulation hydraulic fluid port 32 or second manipulation oil Mouth 33, the manipulation oil inlet 31 of each driven valve 30 connects with second actuator port 12, and the first of n-th driven valve 30 Manipulation hydraulic fluid port 32 is communicated in the rodless cavity of the n-th hydraulic cylinder in first group of hydraulic cylinder, the second behaviour of n-th driven valve 30 Oil-control mouth 33 is communicated in the rodless cavity of n-th hydraulic cylinder in second group of hydraulic cylinder and the 3rd group of hydraulic cylinder.
Fig. 2 and Fig. 3 show two kinds of different embodiments.As described above, in the case where there is N number of driven valve, selecting Under the cooperation for selecting valve, 4*N hydraulic cylinder can be at most controlled.In Fig. 2 embodiment, N is 4, and hydraulic cylinder is most More situations:16;In Fig. 3 embodiment, N is 4, and hydraulic cylinder is 12.It is specific with reference to Fig. 1 and Fig. 2 Embodiment shown in Fig. 2 is described, but those skilled in the art are it should also be understood that N can also be 2,3,5 or 6, and be not limited to 4 shown in illustrated embodiment.
Main reversing valve 10 is used for the flow direction of control pressure hydraulic oil.As shown in figure 1, main reversing valve 10, which has, is used for delivery pressure Power hydraulic oil P the first actuator port 11 and the second actuator port 12, also (it is used to lead to other execution machines with another hydraulic fluid port V Structure, such as the upper mechanism of car of engineering machinery).Pressure fluid into main reversing valve 10 presses oil diverse locations of the P by such as valve element, so as to Realize and pressure fluid force feed is transported to different hydraulic fluid ports.In the technical scheme of the application, P points of pressure fluid force feed will be mainly discussed The situation of the first actuator port 11 and the second actuator port 12 is not flowed to.
As shown in figure 1, the first actuator port 11 is communicated in the selection oil inlet 21 of selector valve 20, it is preferable that main reversing valve 10 the first actuator port 11 is connected in series with hydraulic control one-way valve D, and the first actuator port 11 is communicated in by hydraulic control one-way valve D The selection oil inlet 21 of selector valve 20, hydraulic control one-way valve D control terminal are connected to the second actuator port 12.The hydraulic control one-way valve Effect explanation will be described below.As shown in figure 1, selector valve 20 also there is first choice hydraulic fluid port 22 and second to select hydraulic fluid port 23, therefore the pressure fluid force feed for coming from the first actuator port 11 (if any) can be by selecting oil inlet 21 and optional Flow to first choice hydraulic fluid port 22 or second with selecting select hydraulic fluid port 23.
As shown in Fig. 2 the hydraulic circuit also includes first group of hydraulic cylinder to the 4th group of hydraulic cylinder (multiple horizontal strokes in such as Fig. 2 It is respectively the 1st group, the 2nd group, the 3rd group and the 4th group from the bottom up shown in row frame, in Fig. 2), every group of hydraulic cylinder has N number of hydraulic pressure Cylinder (is respectively the 1st, the 2nd, the 3rd and the 4th from left to right shown in the perpendicular row shown in Fig. 2, in Fig. 2.Therefore in Fig. 2 In hydraulic cylinder arrangement, the lower left corner is the 1st hydraulic cylinder in the 1st group, is designated as 1-1, and the upper right corner is the 4th hydraulic pressure in the 4th group Cylinder, 4-4 is designated as, by that analogy).
The first choice hydraulic fluid port 22 of selector valve 20 is respectively communicated with each liquid in first group of hydraulic cylinder and second group of hydraulic cylinder The rod chamber of cylinder pressure, the second selection hydraulic fluid port 23 are respectively communicated with each hydraulic pressure in the 3rd group of hydraulic cylinder and the 4th group of hydraulic cylinder The rod chamber of cylinder.
On the rodless cavity of hydraulic cylinder, connection is controlled by N number of driven valve 30.Specifically as shown in Fig. 2 each driven valve 30, which include manipulation oil inlet 31, first, manipulates the manipulation hydraulic fluid port 33 of hydraulic fluid port 32 and second, and the manipulation oil inlet 31 selectively connects Pass through the first manipulation hydraulic fluid port 32 or the second manipulation hydraulic fluid port 33, the manipulation oil inlet 31 of each driven valve 30 work with described second Hydraulic fluid port 12 connects, and the first manipulation hydraulic fluid port 32 of n-th driven valve 30 is communicated in first group of hydraulic cylinder and the 3rd group of hydraulic cylinder In n-th hydraulic cylinder rodless cavity, n-th driven valve 30 second manipulation hydraulic fluid port 33 is communicated in second group of hydraulic cylinder and the 4th The rodless cavity of n-th hydraulic cylinder in group hydraulic cylinder.
The annexation of all parts of hydraulic circuit in the present invention described in detail above.Described below in conjunction with Fig. 2 The operating process of each hydraulic jack.
When pressure fluid presses oil P and enters the selection oil inlet 21 of selector valve 20 by the first actuator port 11, according to selection The spool position of valve 20, when needing to manipulate the 1st, 2 group of hydraulic cylinder, make pressurized hydraulic oil stream to first choice hydraulic fluid port 22, and work as When needing to manipulate the 3rd, 4 group of hydraulic cylinder, make pressurized hydraulic oil stream to the second selection hydraulic fluid port 23.
Introduced exemplified by flowing to first choice hydraulic fluid port 22.Now, pressure fluid force feed is divided by first choice hydraulic fluid port 22 The rod chamber of the 1st and 2 group of hydraulic cylinder is not flowed to.And the rodless cavity of the 1st hydraulic cylinder in the 1st and 2 group is connected to the 1st First manipulation hydraulic fluid port 32 and second of driven valve 30 (i.e. a driven valve of the leftmost side in Fig. 1 and Fig. 2) manipulates hydraulic fluid port 33.Cause This, by controlling the valve element of the leftmost side driven valve, can control 1-1 hydraulic cylinders (the 1st hydraulic cylinder in the 1st group) and 2-1 Hydraulic cylinder (the 1st hydraulic cylinder in the 2nd group).Specifically, when the valve element that the leftmost side manipulates valve 30 moves down, 1-1 liquid The rodless cavity of cylinder pressure is connected by the first manipulation hydraulic fluid port 32 with manipulation oil inlet 31, then passes through the oil return of the second actuator port 12; When the valve element that the leftmost side manipulates valve 30 moves up, the rodless cavities of 2-1 hydraulic cylinders by the second manipulation hydraulic fluid port 33 with manipulate into Hydraulic fluid port 31 connects, and then passes through the oil return of the second actuator port 12.By that analogy, pressurized hydraulic oil stream is made to first in selector valve 20 Select in the situation of hydraulic fluid port 22 (as shown in Fig. 2 the valve element of selector valve 20 moves down), each driven valve can control the respectively The retracting action of each hydraulic cylinder in 1 and 2 group.Make pressurized hydraulic oil stream to the situation of the second selection hydraulic fluid port 23 in selector valve 20 In (as shown in Fig. 2 the valve element of selector valve 20 moves up), each driven valve can control each liquid in the 3rd and 4 group respectively The retracting action of cylinder pressure.
When pressure fluid force feed P flows to the second actuator port 12, and then reach the manipulation oil inlet 31 of each driven valve.It is false The valve element of fixed each driven valve 30 moves down, therefore manipulates oil inlet 31 and be connected to respective first manipulation hydraulic fluid port 32, And then pressure fluid force feed enters the rodless cavity of the 1st and 3 group of each hydraulic cylinder.In the case, the spool position of selector valve 20 It can select to control the 1st group of hydraulic cylinder or the 3rd group of hydraulic cylinder.So that the valve element of selector valve 20 moves down (situation in Fig. 2) as an example, Now, the rod chamber of each hydraulic cylinder in the 1st and 2 group can be connected by first choice hydraulic fluid port 22 with selection oil inlet 21 It is logical, and and then by the oil return of the first actuator port 11, so as to make corresponding hydraulic cylinder in the 1st group by each driven valve 30 Extending action.Simultaneously as the rodless cavity of the 2nd group of hydraulic cylinder does not have a pressure fluid force feed, therefore the 2nd group of hydraulic cylinder and motionless Make.And if the valve element of selector valve 20 moves up, then the hydraulic cylinder of the 3rd group of hydraulic cylinder can be similarly controlled.
As illustrated, selector valve 20 and each driven valve 30 are respectively provided with the centre position for closing each valve port.Above-mentioned master changes It can be connected in several ways to valve 10, selector valve 20 and each driven valve 30.For example, each valve can be individually first Part, it is connected to each other by pipeline;Or pile-up valve can also be become.
For the embodiment shown in Fig. 3, compared with Fig. 2 embodiment, actually reduce the execution machine of part Structure, its working process and principle is similar with Fig. 2 embodiment, just repeats no more herein.
Furthermore it is preferred that as shown in Figures 2 and 3, the second manipulation hydraulic fluid port 33 of each driven valve 30 passes through check valve respectively Overload valve PR is connected to, overload valve PR control terminal is connected to first actuator port 11.Therefore, if into the first work Make hydraulic fluid port 11 pressurized hydraulic oil pressure it is excessive when, overload valve PR can be connected, so as to discharge system pressure.Similarly, if entered Enter the second actuator port 12 pressurized hydraulic oil pressure it is excessive when, hydraulic control one-way valve D can also be connected, to discharge system pressure.
The technical scheme of the application is applied to control the situation of multiple hydraulic cylinders in batch, is particularly suitable for use under engineering machinery Car system, therefore above-mentioned groups of hydraulic cylinder is the load for system of being got off in engineering machinery.It is further preferred that load bag Include each supporting leg of the engineering machinery.
In addition, present invention also provides a kind of engineering machinery, the engineering machinery includes the above-mentioned hydraulic circuit of the application.It is excellent Selection of land, above-mentioned engineering machinery are crane.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, still, the present invention is not limited to above-mentioned reality The detail in mode is applied, in the range of the technology design of the present invention, a variety of letters can be carried out to technical scheme Monotropic type, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the present invention to it is various can The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally The thought of invention, it should equally be considered as content disclosed in this invention.

Claims (14)

1. for the hydraulic circuit of engineering machinery, wherein, the hydraulic circuit includes:
Main reversing valve (10), the main reversing valve (10) have for discharge pressure hydraulic oil (P) the first actuator port (11) and Second actuator port (12);
Selector valve (20), the selector valve (20) have selection oil inlet (21), first choice hydraulic fluid port (22) and the second selection hydraulic fluid port (23), the selection oil inlet (21) connects with first actuator port (11) and is selectively communicated in the first choice Hydraulic fluid port (22) or the second selection hydraulic fluid port (23);
For first group of hydraulic cylinder to the 4th group of hydraulic cylinder, every group of hydraulic cylinder has N number of hydraulic cylinder, and N is non-zero natural number, and described first Selection hydraulic fluid port (22) is respectively communicated with the rod chamber of each hydraulic cylinder in first group of hydraulic cylinder and second group of hydraulic cylinder, described Second selection hydraulic fluid port (23) is respectively communicated with the rod chamber of each hydraulic cylinder in the 3rd group of hydraulic cylinder and the 4th group of hydraulic cylinder;
N number of driven valve (30), each driven valve (30) include manipulation oil inlet (31), the first manipulation hydraulic fluid port (32) and the second manipulation Hydraulic fluid port (33), the manipulation oil inlet (31) are selectively communicated in the first manipulation hydraulic fluid port (32) or the second manipulation hydraulic fluid port (33), the manipulation oil inlet (31) of each driven valve (30) connects with second actuator port (12), n-th driven valve (30) the first manipulation hydraulic fluid port (32) is communicated in the nothing of first group of hydraulic cylinder and the n-th hydraulic cylinder in the 3rd group of hydraulic cylinder Rod cavity, the second manipulation hydraulic fluid port (33) of n-th driven valve (30) are communicated in n-th in second group of hydraulic cylinder and the 4th group of hydraulic cylinder The rodless cavity of hydraulic cylinder.
2. hydraulic circuit according to claim 1, wherein, N 2,3,4,5 or 6.
3. hydraulic circuit according to claim 1, wherein, the first actuator port (11) series connection of the main reversing valve (10) Hydraulic control one-way valve (D) is connected with, first actuator port (11) is communicated in the selector valve by the hydraulic control one-way valve (D) (20) selection oil inlet (21), the control terminal of the hydraulic control one-way valve (D) are connected to second actuator port (12).
4. hydraulic circuit according to claim 1, wherein, the second manipulation hydraulic fluid port (33) of each driven valve (30) leads to respectively Cross check valve and be connected to overload valve (PR), the control terminal of the overload valve (PR) is connected to first actuator port (11).
5. hydraulic circuit according to claim 1, wherein, the hydraulic cylinder is for the negative of system of being got off in engineering machinery Carry.
6. for the hydraulic circuit of engineering machinery, wherein, the hydraulic circuit includes:
Main reversing valve (10), the main reversing valve (10) have for discharge pressure hydraulic oil (P) the first actuator port (11) and Second actuator port (12);
Selector valve (20), the selector valve (20) have selection oil inlet (21), first choice hydraulic fluid port (22) and the second selection hydraulic fluid port (23), the selection oil inlet (21) connects with first actuator port (11) and is selectively communicated in the first choice Hydraulic fluid port (22) or the second selection hydraulic fluid port (23);
For first group of hydraulic cylinder to the 3rd group of hydraulic cylinder, every group of hydraulic cylinder has N number of hydraulic cylinder, and N is non-zero natural number, and described first Selection hydraulic fluid port (22) is respectively communicated with the rod chamber of each hydraulic cylinder in first group of hydraulic cylinder and second group of hydraulic cylinder, and described second Selection hydraulic fluid port (23) is respectively communicated with the rod chamber of each hydraulic cylinder in the 3rd group of hydraulic cylinder;
N number of driven valve (30), each driven valve (30) include manipulation oil inlet (31), the first manipulation hydraulic fluid port (32) and the second manipulation Hydraulic fluid port (33), the manipulation oil inlet (31) are selectively communicated in the first manipulation hydraulic fluid port (32) or the second manipulation hydraulic fluid port (33), the manipulation oil inlet (31) of each driven valve (30) connects with second actuator port (12), n-th driven valve (30) the first manipulation hydraulic fluid port (32) is communicated in the rodless cavity of the n-th hydraulic cylinder in first group of hydraulic cylinder, n-th manipulation Second manipulation hydraulic fluid port (33) of valve (30) be communicated in n-th hydraulic cylinder in second group of hydraulic cylinder and the 3rd group of hydraulic cylinder without bar Chamber.
7. hydraulic circuit according to claim 6, wherein, N 2,3,4,5 or 6.
8. hydraulic circuit according to claim 6, wherein, the first actuator port (11) series connection of the main reversing valve (10) Hydraulic control one-way valve (D) is connected with, first actuator port (11) is communicated in the selector valve by the hydraulic control one-way valve (D) (20) selection oil inlet (21), the control terminal of the hydraulic control one-way valve (D) are connected to second actuator port (12).
9. hydraulic circuit according to claim 6, wherein, the second manipulation hydraulic fluid port (33) of each driven valve (30) leads to respectively Cross check valve and be connected to overload valve (PR), the control terminal of the overload valve (PR) is connected to first actuator port (11).
10. hydraulic circuit according to claim 6, wherein, the hydraulic cylinder is for system of being got off in engineering machinery Load.
11. engineering machinery, the engineering machinery is provided with the hydraulic circuit described in any one in claim 1-10.
12. engineering machinery according to claim 11, wherein, the hydraulic cylinder is for system of being got off in engineering machinery Load.
13. engineering machinery according to claim 12, wherein, it is described to load each supporting leg for including the engineering machinery.
14. according to the engineering machinery described in any one in claim 11-13, wherein, the engineering machinery is crane.
CN201610696126.6A 2016-08-19 2016-08-19 Hydraulic circuit and engineering machinery for engineering machinery Active CN106246621B (en)

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CN108252969B (en) * 2017-12-25 2020-10-02 太原重工股份有限公司 Transportation equipment and hydraulic system thereof

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CN201539456U (en) * 2009-10-29 2010-08-04 宁波市博尔法液压有限公司 Step-down multi-way valve
CN102996553A (en) * 2012-11-27 2013-03-27 三一重工股份有限公司 Support leg hydraulic system and engineering machinery
CN205715026U (en) * 2016-04-13 2016-11-23 圣邦集团有限公司 One piece casting type is got off Multi-way valve with support leg

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2224944Y (en) * 1994-01-24 1996-04-17 奉化豪发液压气动有限公司 Hydraulic multi-channel switching valve
CN2198432Y (en) * 1994-05-28 1995-05-24 兖州市圣达液压机械制造厂 Multi-way valve with support leg
JP4155381B2 (en) * 2000-10-06 2008-09-24 株式会社小松製作所 Attachment control device for hydraulic excavator
CN2504157Y (en) * 2001-07-02 2002-08-07 温州市液压件厂 Hydraulic multiroute valve of crane truck
CN201539456U (en) * 2009-10-29 2010-08-04 宁波市博尔法液压有限公司 Step-down multi-way valve
CN102996553A (en) * 2012-11-27 2013-03-27 三一重工股份有限公司 Support leg hydraulic system and engineering machinery
CN205715026U (en) * 2016-04-13 2016-11-23 圣邦集团有限公司 One piece casting type is got off Multi-way valve with support leg

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