CN205841357U - A kind of leveling control valve, hydraulic system and engineering machinery - Google Patents
A kind of leveling control valve, hydraulic system and engineering machinery Download PDFInfo
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- CN205841357U CN205841357U CN201620308334.XU CN201620308334U CN205841357U CN 205841357 U CN205841357 U CN 205841357U CN 201620308334 U CN201620308334 U CN 201620308334U CN 205841357 U CN205841357 U CN 205841357U
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- control valve
- leveling control
- plug
- throttle
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Abstract
The utility model proposes a kind of leveling control valve, for engineering machinery, including valve body and the main valve plug that is arranged in valve body, described valve body is provided with first throttle valve, second throttle and the 3rd choke valve, described first throttle valve, second throttle connect with main valve plug respectively with the 3rd choke valve, and described valve body is additionally provided with the first check valve and the second check valve.The leveling control valve of this structure, compared with the control valve class of existing structure, has levelling effect good, and the advantage that functional reliability is high.On the other hand, this utility model also proposes a kind of hydraulic system including above-mentioned leveling control valve.Finally, this utility model also proposes a kind of to include above-mentioned leveling control valve or the engineering machinery of hydraulic system.
Description
Technical field
This utility model relates to engineering machinery field, particularly to a kind of leveling control valve, hydraulic system and engineering machinery.
Background technology
Control valve, such as automatic leveling control valve etc., is belonging to common component, at present in city in construction machinery hydraulic system
Flat act control valve conventional on field mainly uses sequence valve to control the mode of shunting, during utilization, due to the unlatching of sequence valve
Characteristic is undesirable, and secondary work mechanism load is the heaviest in addition, it will usually the pressure causing the big chamber of operating mechanism is the lowest, also can lead
Causing sequence valve cannot open, leveling was lost efficacy.
In sum, how a kind of levelling effect and the good leveling control valve of functional reliability are provided, and include that this adjusts
The hydraulic system of flat control valve and engineering machinery, become those skilled in the art to need badly and solved the technical problem that.
Utility model content
The technical problems to be solved in the utility model is: provide a kind of levelling effect and the good leveling of functional reliability to control
Valve, hydraulic system and engineering machinery.
Solution of the present utility model is achieved in that and the utility model proposes a kind of leveling control valve, for work
Journey machinery, including valve body and the main valve plug that is arranged in valve body, described valve body is additionally provided with first throttle valve, second throttle
With the 3rd choke valve, described first throttle valve, second throttle connect with main valve plug respectively with the 3rd choke valve, on described valve body
It is additionally provided with the first check valve and the second check valve.
Another technical scheme of the present utility model is on above-mentioned basis, and described first throttle valve includes spool and set
The valve pocket being arranged on spool, described spool can move relative to described valve pocket.
Another technical scheme of the present utility model is, on above-mentioned basis, to be provided with sealing between described valve pocket and valve body
Circle, also is provided with sealing ring between described spool and valve pocket.
Another technical scheme of the present utility model is on above-mentioned basis, described second throttle, the 3rd choke valve
Consistent with the structure of first throttle valve.
Another technical scheme of the present utility model is on above-mentioned basis, and the left end of described main valve plug is provided with first and blocks up
Head, the right-hand member of described main valve plug is provided with the second plug, is additionally provided with sealing ring between described second plug and valve body.
Another technical scheme of the present utility model is on above-mentioned basis, and described main valve plug is near the one of the second plug
End is additionally provided with back-moving spring.
Another technical scheme of the present utility model is on above-mentioned basis, described first check valve, the second check valve
Quantity be one.
Another technical scheme of the present utility model is on above-mentioned basis, and described leveling control valve is two five-way liquid
Power reversal valve.
The leveling control valve of said structure, compared with the control valve class of existing structure, has levelling effect good, and work
The advantage that reliability is high.
On the other hand, this utility model also proposes a kind of hydraulic system, for engineering machinery, including leveling control valve, institute
Stating leveling control valve is the leveling control valve according to any one of claim 1 to 8.
The hydraulic system of this structure correspondingly, has leveling control valve and is had the advantage that.
Finally, this utility model also proposes a kind of engineering machinery, and described engineering machinery includes in claim 1 to 8 arbitrary
Leveling control valve described in Xiang or the hydraulic system described in claim 9.
Accompanying drawing explanation
The accompanying drawing constituting a part of the present utility model is further appreciated by of the present utility model for providing, and this practicality is new
The schematic description and description of type is used for explaining this utility model, is not intended that improper restriction of the present utility model.
Fig. 1 is the structural representation of this utility model a kind of leveling control valve；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is that the A-A of Fig. 2 is to cross-sectional schematic；
Fig. 4 is the B-B cross-sectional schematic of Fig. 1；
Fig. 5 is the fundamental diagram of leveling control valve.
Reference corresponding relation is:
1: valve body 2: main valve plug 3: locking nut
4: valve pocket 5: sealing member 6: sealing member
7: spool 8: the first plug 9: back-moving spring
10: sealing member 11: the second plug 12: technique plug 1
13: technique plug 2 14: inner elements of check valve 15: one-way valve spring
16: check valve sealing member 17: check valve plug 18: leveling control valve
19: hand-operated valve the Y1: the first oil cylinder the Y2: the second oil cylinder
NV I first throttle valve NV II second throttle NV III the 3rd choke valve
CV I first check valve CV II second check valve
Detailed description of the invention
Being described in detail this utility model below in conjunction with the accompanying drawings, the description of this part is only exemplary and explanatory,
Protection domain of the present utility model should there be is not any restriction effect.Additionally, those skilled in the art's retouching according to presents
State, the feature in embodiment in presents and in different embodiment can be carried out respective combination.
This utility model embodiment is as follows, refers to the leveling control valve 18 shown in Fig. 1 to Fig. 4, for sliding loader
And in the engineering machinery such as high-altitude operation vehicle, specifically include valve body 1, in valve body 1, be provided with main valve plug 2, valve body 1 is additionally provided with first segment
Stream valve NV I, second throttle NV the II and the 3rd choke valve NV III, and, first throttle valve NV I, second throttle NV II and the
Three choke valve NV III connect with main valve plug 2 respectively, meanwhile, valve body 1 are additionally provided with the first check valve CV I and the second check valve CV
II, the first check valve CV I and the second check valve CV II all includes inner elements of check valve 14, and inner elements of check valve 14 is additionally provided with check valve
Spring 15.The two ends of the second check valve CV II can connect with choke valve or main valve plug 2 respectively.The leveling control valve 18 of this structure,
Compared with the control valve class of existing structure, there is levelling effect good, and the advantage that functional reliability is high.
On the basis of above-described embodiment, in another embodiment of this utility model, as it is shown on figure 3, choke valve includes spool 7
With the valve pocket 4 being sheathed on spool 7, and, spool 7 can move relative to valve pocket 4 radial direction, and spool is additionally provided with locking screw
Female 3, by the relative position of locking nut 3 scalable spool 7 with valve pocket 4.Second throttle NV II and the 3rd as shown in Figure 3
Joint valve stream NV III, is respectively equipped with second throttle core and the 3rd throttling valve core, when throttling valve core moves down, plays inside it
The effect progressively throttled.When throttling valve core moves up, the fluid flowing through second throttle and the 3rd choke valve can progressively increase
Greatly.
On the basis of above-described embodiment, in another embodiment of this utility model, as shown in Figure 3 and Figure 4, for anti-stopping leak
Leakage, is additionally provided with sealing ring 5, meanwhile, also is provided with sealing between throttling valve core 7 and throttling valve pocket 4 between throttling valve pocket 4 and valve body 1
Circle 6, the preferred O-ring seals of sealing ring.Can be according to reality for parameters such as all sealing member models shown in Fig. 3 to Fig. 4, materials
Border needs to select, and is not especially limited at this.
On the basis of above-described embodiment, in another embodiment of this utility model, as shown in Figure 3 and Figure 4, first throttle valve
NV I, second throttle NV the II and the 3rd choke valve NV III structure consistent, include throttling valve core 7, valve pocket 4, locking nut respectively
The parts such as 3 and sealing ring 56.
On the basis of above-described embodiment, in another embodiment of this utility model, as shown in Figure 4, one end of main valve plug 2,
It is specially left end and is additionally provided with the first plug 8, and the other end of main valve, the i.e. right-hand member of main valve plug 2, it is additionally provided with the second plug 11, main
Spool 2 can move in valve body 1.For preventing leakage, being additionally provided with sealing ring 10 between the second plug 11 and valve body 1, sealing ring is same
Sample can be O-ring seals.Additionally, as shown in Fig. 3 Fig. 4, valve body 1 is additionally provided with technique plug 12,13
On the basis of above-described embodiment, in another embodiment of this utility model, as shown in Figure 4, main valve plug 2 is near second
One end of plug 11 is additionally provided with back-moving spring 9, when main valve plug 2 moves right to precalculated position, back-moving spring 9 helps it multiple
Position, promotes main valve plug 2 to be moved to the left.
On the basis of above-described embodiment, in another embodiment of this utility model, unidirectional for the first check valve and second
The quantity of valve, as it is shown on figure 3, preferably two, it being respectively one, the two ends of two check valves all connect with main valve plug 2 or choke valve
Logical.
On the basis of above-described embodiment, in another embodiment of this utility model, leveling control valve 18 is preferably two five
Logical hydraulic changeover valve, it should be noted that leveling control valve 18 is in addition to controlling by fluid power, it is also possible to by Electromagnetic Control, also
Can be with manual control, but no matter which kind of control mode, all in protection domain of the present utility model.
For the operation principle of leveling control valve 18, as it is shown in figure 5, under the effect of right side hand-operated valve 19, the first oil cylinder
During the rodless cavity oil-feed of Y1, rod chamber oil return, oil return passes through B mouth, and spool 2 commutates, and spool 2 enters work shape from duty 1
State 2, now, a part for B mouth fluid is by damping, then flows back to fuel tank by A mouth.A part of fluid is then by the first check valve
CV I enters C mouth, and enters the rodless cavity of the second oil cylinder Y2, and the first check valve CV I can ensure that fluid will not flow backwards, the second oil cylinder
Fluid in the rod chamber of Y2 returns to fuel tank after being converged by D mouth and A mouth, controls the second oil cylinder Y2's by regulation choke valve
Operating rate, makes the rodless cavity oil-feed operating rate of the first oil cylinder Y1 and the second oil cylinder Y2 oil-feed operating rate form a definite proportion
Example, it is ensured that the second oil cylinder Y2 is constantly in horizontal operation state, reaches levelling effect.
On the other hand, in addition to above-mentioned leveling control valve 18, this utility model also proposes a kind of hydraulic system, hydraulic system
Can be used for various engineering machinery, including leveling control valve 18, specifically, leveling control valve 18 is leveling control valve as above
18。
Finally, this utility model also proposes a kind of engineering machinery, specifically such as sliding loader and high-altitude operation vehicle etc., including
Leveling control valve 18 as above, or hydraulic system as above.
The above is only preferred implementation of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of without departing from this utility model principle, it is also possible to make some improvements and modifications, these improve and
Retouching also should be regarded as protection domain of the present utility model.
Claims (10)
1. a leveling control valve, described leveling control valve is used for engineering machinery, it is characterised in that includes valve body (1) and sets
The main valve plug (2) being placed in valve body (1), described valve body (1) is additionally provided with first throttle valve (NV I), second throttle (NV II)
With the 3rd choke valve (NV III), described first throttle valve (NV I), second throttle (NV II) and the 3rd choke valve (NV III) are respectively
Connect with main valve plug (2), described valve body (1) is additionally provided with the first check valve (CV I) and the second check valve (CV II).
Leveling control valve the most according to claim 1, it is characterised in that described first throttle valve (NV I) includes spool (7)
With the valve pocket (4) being arranged on spool (7), described spool (7) can be mobile relative to described valve pocket (4).
Leveling control valve the most according to claim 2, it is characterised in that be provided with close between described valve pocket (4) and valve body (1)
Seal (5), also is provided with sealing ring (6) between described spool (7) and valve pocket (4).
Leveling control valve the most according to claim 3, it is characterised in that described second throttle (NV II), the 3rd throttling
Valve (NV III) is consistent with the structure of first throttle valve (NV I).
Leveling control valve the most according to claim 1, it is characterised in that the left end of described main valve plug (2) is provided with first and blocks up
Head (8), the right-hand member of described main valve plug (2) is provided with the second plug (11), is additionally provided with between described second plug (11) and valve body (1)
Sealing ring (10).
Leveling control valve the most according to claim 5, it is characterised in that the second plug of described main valve plug (2) right-hand member
(11) back-moving spring (9) it is additionally provided with.
Leveling control valve the most according to claim 6, it is characterised in that described first check valve (CV I), the second check valve
The quantity of (CV II) is one.
Leveling control valve the most according to any one of claim 1 to 7, it is characterised in that described leveling control valve is two
Position five-way hydraulic changeover valve.
9. a hydraulic system, for engineering machinery, including leveling control valve (18), it is characterised in that described leveling control valve
(18) it is the leveling control valve according to any one of claim 1 to 8.
10. an engineering machinery, it is characterised in that described engineering machinery includes the leveling according to any one of claim 1 to 8
Hydraulic system described in control valve (18) or claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620308334.XU CN205841357U (en) | 2016-04-13 | 2016-04-13 | A kind of leveling control valve, hydraulic system and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620308334.XU CN205841357U (en) | 2016-04-13 | 2016-04-13 | A kind of leveling control valve, hydraulic system and engineering machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205841357U true CN205841357U (en) | 2016-12-28 |
Family
ID=57628035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620308334.XU Active CN205841357U (en) | 2016-04-13 | 2016-04-13 | A kind of leveling control valve, hydraulic system and engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205841357U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111895135A (en) * | 2020-09-07 | 2020-11-06 | 徐州徐工液压件有限公司 | Oil port switching structure of two-position five-way valve |
-
2016
- 2016-04-13 CN CN201620308334.XU patent/CN205841357U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111895135A (en) * | 2020-09-07 | 2020-11-06 | 徐州徐工液压件有限公司 | Oil port switching structure of two-position five-way valve |
| CN111895135B (en) * | 2020-09-07 | 2022-05-03 | 徐州徐工液压件有限公司 | Oil port switching structure of two-position five-way valve |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |