CN206607627U - A kind of boom priority control valve line structure and hydraulic crawler excavator - Google Patents
A kind of boom priority control valve line structure and hydraulic crawler excavator Download PDFInfo
- Publication number
- CN206607627U CN206607627U CN201720159810.0U CN201720159810U CN206607627U CN 206607627 U CN206607627 U CN 206607627U CN 201720159810 U CN201720159810 U CN 201720159810U CN 206607627 U CN206607627 U CN 206607627U
- Authority
- CN
- China
- Prior art keywords
- oil
- valve
- switching valve
- cylinder
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Operation Control Of Excavators (AREA)
Abstract
The utility model discloses boom priority control valve line structure and hydraulic crawler excavator, oil circuit and common oil circuit are controlled including swing arm, swing arm control oil circuit includes switching valve, boom cylinder and check valve, switching valve is connected to boom cylinder by two oil pipes, the oil inlet of switching valve is connected to fuel tank, and the hydraulic fluid port that goes out to examine of switching valve is connected directly to common oil circuit by check valve；When boom priority control valve line structure of the present utility model is from pump oil mouthful to cylinder ports fuel feeding, without all passing through pressure-compensated valve, you can to boom cylinder supply hydraulic fluid；The detection hydraulic fluid port of slave arm oil cylinder switching valve is importing directly into common LS oil circuits, can reduce oil consumption and improve operability；The simplification of boom priority control valve line structure shape and the reduction of amount of parts, may also function as reduces the effect of cost；The operability of the composite move including swing arm will not be reduced, can improve meet operability on the contrary；In grading operation, the moment of dipper falls when can prevent from starting, and improves security.
Description
Technical field
The utility model is related to the technical field of hydraulic crawler excavator, in particular for a kind of boom priority control valve line structure
And hydraulic crawler excavator.
Background technology
Common hydraulic pressure digging machine load-sensitive formula HYDRAULIC CONTROL SYSTEM valve arrangement form is generally several pieces identical switching valves
The split blade type of housing composition is integral housing casting composition.Usual hydraulic oil is to be supplied to swing arm oil from common pump oil road
The pump oil mouthful of cylinder switching valve, then be supplied to from detection mouth by pressure-compensated valve in cylinder ports.Even if so pressure-compensated valve is opened
Spend for maximum opening, when hydraulic oil is by recuperation valve, fuel delivery is many when can also produce crushing, particularly boom arm lift, can not
Beneficial to energy-conservation.On the one hand, digging machine after scraper bowl excavation is carried out needs excavation thing to transport on dumper, that is, is lifted while revolution
Swing arm, swing arm must quickly reach the height of dumper in the predetermined angular of revolution.In past technology, in order to adjust revolution
The height that angle and swing arm rise, resists to postpone rotational speed, so as to reach by the oil circuit increased to rotation pressure recuperation valve
To the purpose of adjustment swing arm lifting height, but can so oil consumption be caused to increase.On the other hand, hydraulic pressure digging machine often uses level land
Operation, particularly dipper are excavated and boom arm lift.But under past technology, as the characteristic of hydraulic pressure digging machine, dipper and dynamic
Arm is weighed very much as structural member, and also dipper has the Gravitative Loads on bucket arm cylinder prolonging direction, and swing arm can be in swing arm
There are Gravitative Loads on the shrinkage direction of oil cylinder.Dipper switching valve and swing arm switching valve are operated simultaneously, make the hydraulic pressure from variable pump
Oil is fed to dipper and excavated, on the oil cylinder of boom arm lift two.Meanwhile, because dipper dredge operation is low pressure, boom arm lift is high pressure,
Boom cylinder is before elongation when therefore starting, and dipper can be fallen because of deadweight, cause grading operation highly difficult.
But existing excavator also with the following drawback that：
(1) according to past technology, pressure compensation valve element, oil are provided with the fuel feeding path from pump oil road to boom cylinder
Road can produce very big resistance, so as to hinder swing arm to rise rapidly, cause on swing arm fails in the claimed range of angle of revolution
Enough height are raised to, so as to influence operating efficiency；
(2) hydraulic oil from detection hydraulic fluid port by pressure-compensated valve, and because pressure-compensated valve allocation position relation and shape,
It can be restricted by the area or length of oil circuit, add the oil circuit resistance to importing；
(3) pressure detected from the detection hydraulic fluid port of dipper switching valve is applied to bucket arm cylinder by common LS oil circuits and switched
, it is necessary to the regular hour on valve pressure-compensated valve, so as to postpone the action of the pressure-compensated valve of bucket arm cylinder switching valve, dipper because
Fall down on self-weight, during this period, the oil extraction of variable pump only flow to dipper, so that swing arm vertical motion is postponed, may make level land
Operate generation problem.
Utility model content
There is influence operating efficiency to solve above-mentioned prior art, add oil circuit resistance to importing, may make
The problem of level land operates generation problem, the utility model provides a kind of boom priority control valve line structure and hydraulic crawler excavator.
To reach above-mentioned purpose, the utility model provides a kind of boom priority control valve line structure, it is adaptable to hydraulic excavating
The control oil circuit of machine, wherein, including swing arm control oil circuit and common oil circuit, the swing arm control oil circuit includes switching valve, dynamic
Arm oil cylinder and check valve, the switching valve are connected to the boom cylinder, the oil inlet connection of the switching valve by two oil pipes
To fuel tank, the hydraulic fluid port that goes out to examine of the switching valve is connected directly to the common oil circuit by the check valve.
Above-mentioned boom priority control valve line structure, wherein, in addition to dipper control oil circuit, including bucket arm cylinder, switching
Valve and a pressure-compensated valve, the switching valve are connected to the bucket arm cylinder, the oil inlet of the switching valve by two oil pipes
The fuel tank is connected to, the hydraulic fluid port that goes out to examine of the switching valve is connected to the common oil circuit by the pressure-compensated valve.
Above-mentioned boom priority control valve line structure, wherein, in addition to scraper bowl control oil circuit, including bucket cylinder, switching
Valve and a pressure-compensated valve, the switching valve are connected to the bucket cylinder, the oil inlet of the switching valve by two oil pipes
The fuel tank is connected to, the hydraulic fluid port that goes out to examine of the switching valve is connected to the common oil circuit by the pressure-compensated valve.
Above-mentioned boom priority control valve line structure, wherein, in addition to revolution control oil circuit, including angling cylinder, switching
Valve and a pressure-compensated valve, the switching valve are connected to the angling cylinder, the oil inlet of the switching valve by two oil pipes
The fuel tank is connected to, the hydraulic fluid port that goes out to examine of the switching valve is connected to the common oil circuit by the pressure-compensated valve.
Above-mentioned boom priority control valve line structure, wherein, in addition to left travelling control oil circuit, including left lateral walk oil cylinder,
Switching valve and a pressure-compensated valve, the switching valve are connected to the left lateral by two oil pipes and walk oil cylinder, the switching valve
Oil inlet is connected to the fuel tank, and the hydraulic fluid port that goes out to examine of the switching valve is connected to the common oil by the pressure-compensated valve
Road.
Above-mentioned boom priority control valve line structure, wherein, in addition to right travelling control oil circuit, including right lateral walk oil cylinder,
Switching valve and a pressure-compensated valve, the switching valve are connected to the right lateral by two oil pipes and walk oil cylinder, the switching valve
Oil inlet is connected to the fuel tank, and the hydraulic fluid port that goes out to examine of the switching valve is connected to the common oil by the pressure-compensated valve
Road.
Also include a kind of hydraulic crawler excavator, including the boom priority control valve line structure described in middle any one as described above.
The beneficial effects of the utility model are：
(1) when boom priority control valve line structure of the present utility model is from pump oil mouthful to cylinder ports fuel feeding, without all logical
Excess pressure recuperation valve, you can to boom cylinder supply hydraulic fluid；
(2) the detection hydraulic fluid port of boom priority control valve line structure slave arm oil cylinder switching valve of the present utility model is introduced directly into
To common LS oil circuits, oil consumption can be reduced and operability is improved；
(3) simplification of boom priority control valve line structure shape of the present utility model and the reduction of amount of parts,
It can play a part of reducing cost；
(4) boom priority control valve line structure of the present utility model will not reduce the behaviour of the composite move including swing arm
The property made, can improve meet operability on the contrary；
(5) boom priority control valve line structure of the present utility model is in grading operation, dipper when can prevent from starting
Moment falls, and improves security.
Brief description of the drawings
The utility model is further illustrated with reference to the accompanying drawings and examples:
Fig. 1 is the schematic diagram of boom priority control valve line structure in the present embodiment；
Fig. 2 is the built-in schematic diagram for regenerating path in boom priority control valve line structure in the present embodiment.
In accompanying drawing, 1 is switching valve, and 2 be boom cylinder, and 3 be check valve, and 4 be oil pipe, and 5 be oil inlet, and 6 be to examine hydraulic fluid port,
7 be fuel tank, and 8 be common oil circuit, and 9 be bucket arm cylinder, and 10 be bucket cylinder, and 11 be angling cylinder, and 12 be that left lateral walks oil cylinder, and 13 are
Right lateral walks oil cylinder, and 14 be pressure-compensated valve, and 6a is regenerative circuit, and 6b is regenerative circuit.
Embodiment：
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings, but not as of the present utility model
Limit.
Embodiment
Refer to shown in Fig. 1 to Fig. 2, show a kind of boom priority control valve line structure of preferred embodiment, it is adaptable to
The control oil circuit of hydraulic crawler excavator, wherein, including swing arm control oil circuit and common oil circuit 8, swing arm control oil circuit is including switching
Valve 1, boom cylinder 2 and check valve 3, switching valve 1 are connected to boom cylinder 2 by two oil pipes 4, and the oil inlet 5 of switching valve 1 is connected
To fuel tank 7, the hydraulic fluid port 6 that goes out to examine of switching valve 1 is connected directly to common oil circuit 8 by check valve 3.
The present embodiment also has implementation below on the basis of the above, continuing with referring to shown in Fig. 1 and Fig. 2,
In the further embodiment of the present embodiment, in addition to dipper control oil circuit, including bucket arm cylinder 9, switching valve 1 and
One pressure-compensated valve, switching valve 1 is connected to bucket arm cylinder 9 by two oil pipes 4, and the oil inlet 5 of switching valve 1 is connected to fuel tank 7, cut
The hydraulic fluid port 6 that goes out to examine for changing valve 1 is connected to common oil circuit 8 by pressure-compensated valve.
In the further embodiment of the present embodiment, in addition to scraper bowl control oil circuit, including bucket cylinder 10, switching valve 1 with
And a pressure-compensated valve, switching valve 1 is connected to bucket cylinder 10 by two oil pipes 4, and the oil inlet 5 of switching valve 1 is connected to fuel tank
7, the hydraulic fluid port 6 that goes out to examine of switching valve 1 is connected to common oil circuit 8 by pressure-compensated valve.
In the further embodiment of the present embodiment, in addition to revolution control oil circuit, including angling cylinder 11, switching valve 1 with
And a pressure-compensated valve, switching valve 1 is connected to angling cylinder 11 by two oil pipes 4, and the oil inlet 5 of switching valve 1 is connected to fuel tank
7, the hydraulic fluid port 6 that goes out to examine of switching valve 1 is connected to common oil circuit 8 by pressure-compensated valve.
In the further embodiment of the present embodiment, in addition to left travelling control oil circuit, including left lateral walks oil cylinder 12, switching valve
1 and a pressure-compensated valve, switching valve 1 is connected to left lateral by two oil pipes 4 and walks oil cylinder 12, and the oil inlet 5 of switching valve 1 is connected to
Fuel tank 7, the hydraulic fluid port 6 that goes out to examine of switching valve 1 is connected to common oil circuit 8 by pressure-compensated valve.
In the further embodiment of the present embodiment, in addition to right travelling control oil circuit, including right lateral walks oil cylinder 13, switching valve
1 and a pressure-compensated valve, switching valve 1 is connected to right lateral by two oil pipes 4 and walks oil cylinder 13, and the oil inlet 5 of switching valve 1 is connected to
Fuel tank 7, the hydraulic fluid port 6 that goes out to examine of switching valve 1 is connected to common oil circuit 8 by pressure-compensated valve.
User can according to it is following explanation further insight the present embodiment characteristic and function,
Also include a kind of hydraulic crawler excavator, including the boom priority control valve road of middle any one as described above in the present embodiment
Structure.
The boom priority control valve line structure of the present embodiment is elaborated below,
Generally, power and speed when being operated in order to ensure hydraulic pressure digging machine boom arm lift, the fuel delivery from variable pump are usual
For maximum oil drain quantity.Even in this case, in order to reduce crushing during big to the boom cylinder chamber fuel feeding of variable pump, at this
In embodiment, the control valve fuel feeding of multiple switching valves is inwardly kept from common variable pump, and the hydraulic pressure in these switching valves is held
The hydraulic fluid port of units is connected with dipper, swing arm, each oil cylinder of scraper bowl and revolution, left and right running motor.
In operation switching valve element, to should be on valve element pump oil mouthful and detection hydraulic fluid port between the different variables that set open
Mouth area, the pressure of each detection hydraulic fluid port is detected and feeds back to above-mentioned variable pump, when pressure and the pump oil mouthful of detection hydraulic fluid port
When pressure reaches certain pressure difference, the delivery flow of above-mentioned variable pump is adjusted, from the pump oil mouthful of each switching valve to the oil of cylinder ports
The pressure-compensated valve being coincide with above-mentioned detection hydraulic fluid port is set on road, and when multiple switching valves are operated simultaneously, maximum pressure passes through altogether
Road (LS oil circuits) is applied on other pressure-compensated valves all, the load sensitive system hydraulic pressure control of the hydraulic pressure digging machine thus constituted
On device processed, the pump oil road of slave arm switching valve is to cylinder ports, while obstructed excess pressure recuperation valve supply hydraulic fluid, Ke Yiti
Height meets the operating efficiency of operability, particularly level land operation, and the pressure of the detection hydraulic fluid port is importing directly into by check valve
State on LS oil circuits, in this, as the feature of the hydraulic control device of hydraulic pressure digging machine.
In addition, in the loading sensitive flow control mode of hydraulic pressure digging machine, during from pump oil mouthful to cylinder ports fuel feeding, without
All pass through pressure-compensated valve, you can to boom cylinder supply hydraulic fluid.Further, the detection hydraulic fluid port of slave arm oil cylinder switching valve is straight
Connect if importeding into common LS oil circuits, oil consumption can be reduced and operability is improved.
Herein, the hydraulic control device of the related hydraulic pressure digging machine of the present embodiment is illustrated according to Fig. 1.Without dynamic in Fig. 1
The corresponding pressure-compensated valve of arm oil cylinder switching valve 1 (in the prior art in the presence of), also has from detection mouth 6, passes through the directly handle of check valve 3
Pressure is imported on common common path 8 (LS oil circuits).
As shown in figure 1, when operating boom cylinder not by the way that the pressure-compensated valve of crushing can be produced, you can supply is from change
The oil extraction of pump is measured, the oil consumption during operation can be so greatly reduced.The also simplification of the oil circuit shape and amount of parts
Reduce, may also function as reduces the effect of cost.
In addition, the present embodiment will not reduce the operability of the composition operation action including swing arm, symbol can be improved on the contrary
Closing operation：Pass through check valve, direct pressure is imported on LS oil circuits of particle size short circuit, therefore composition operation from detection hydraulic fluid port
When, swing arm load pressure is applied directly to other, such as on dipper pressure-compensated valve, is allowed to move on to control position, therefore can
With the oil mass of supply on restriction to dipper, so in grading operation, the moment of dipper falls when can prevent from starting.
As the bad part for removing swing arm pressure-compensated valve, swing arm may be influenceed to decline and perform member with other hydraulic pressure
Operated while part, but as shown in Fig. 2 swing arm decline when, the big chamber of slave arm oil cylinder to small chamber setting regenerative circuit 6b, therefore from
Variable pump is a small amount of to the fuel delivery of the small chamber of the oil cylinder, you can so that Fig. 2 6a, swing arm switches the variable opening on valve element
The maximum area setting in portion diminishes, therefore the fuel delivery of small chamber is a small amount of i.e. no problem from variable pump to boom cylinder, can be made
Most oil mass is flowed in other hydraulic actuators of the composition operation, therefore can improve composition operation.
Meanwhile, obstructed excess pressure recuperation valve, the hydraulic oil of pump can be fed in cylinder ports, can allow switching valve processing altogether
Assimilation, and in order to reduce crushing, the oil circuit shape of detection hydraulic fluid port can also be changed.
The present embodiment preferred embodiment is the foregoing is only, the embodiment and protection of the present embodiment is not thereby limited
Scope, to those skilled in the art, should can appreciate that all utilizations this example demonstrates that book and diagramatic content are made
Scheme obtained by the equivalent substitution gone out and obvious change, should be included in the protection domain of the present embodiment.
Claims (7)
1. a kind of boom priority control valve line structure, it is adaptable to the control oil circuit of hydraulic crawler excavator, it is characterised in that including swing arm
Oil circuit and common oil circuit (8) are controlled, the swing arm control oil circuit includes switching valve (1), boom cylinder (2) and check valve (3),
The switching valve (1) is connected to the boom cylinder (2), oil inlet (5) connection of the switching valve (1) by two oil pipes (4)
To fuel tank (7), the hydraulic fluid port (6) that goes out to examine of the switching valve (1) is connected directly to the common oil circuit by the check valve (3)
(8)。
2. boom priority control valve line structure according to claim 1, it is characterised in that also control oil circuit including dipper,
Including bucket arm cylinder (9), switching valve (1) and a pressure-compensated valve, the switching valve (1) is connected to institute by two oil pipes (4)
Bucket arm cylinder (9) is stated, the oil inlet (5) of the switching valve (1) is connected to the fuel tank (7), and going out for the switching valve (1) examines oily
Mouth (6) is connected to the common oil circuit (8) by the pressure-compensated valve.
3. boom priority control valve line structure according to claim 1, it is characterised in that also control oil circuit including scraper bowl,
Including bucket cylinder (10), switching valve (1) and a pressure-compensated valve, the switching valve (1) is connected to institute by two oil pipes (4)
State bucket cylinder (10), the oil inlet (5) of the switching valve (1) is connected to the fuel tank (7), the switching valve (1) goes out inspection
Hydraulic fluid port (6) is connected to the common oil circuit (8) by the pressure-compensated valve.
4. boom priority control valve line structure according to claim 1, it is characterised in that also including revolution control oil circuit,
Including angling cylinder (11), switching valve (1) and a pressure-compensated valve, the switching valve (1) is connected to institute by two oil pipes (4)
State angling cylinder (11), the oil inlet (5) of the switching valve (1) is connected to the fuel tank (7), the switching valve (1) goes out inspection
Hydraulic fluid port (6) is connected to the common oil circuit (8) by the pressure-compensated valve.
5. boom priority control valve line structure according to claim 1, it is characterised in that also including left travelling control oil
Road, including left lateral walk oil cylinder (12), switching valve (1) and a pressure-compensated valve, and the switching valve (1) is connected by two oil pipes (4)
It is connected to the left lateral and walks oil cylinder (12), the oil inlet (5) of the switching valve (1) is connected to the fuel tank (7), the switching valve
(1) the hydraulic fluid port (6) that goes out to examine is connected to the common oil circuit (8) by the pressure-compensated valve.
6. boom priority control valve line structure according to claim 1, it is characterised in that also including right travelling control oil
Road, including right lateral walk oil cylinder (13), switching valve (1) and a pressure-compensated valve, and the switching valve (1) is connected by two oil pipes (4)
It is connected to the right lateral and walks oil cylinder (13), the oil inlet (5) of the switching valve (1) is connected to the fuel tank (7), the switching valve
(1) the hydraulic fluid port (6) that goes out to examine is connected to the common oil circuit (8) by the pressure-compensated valve.
7. a kind of hydraulic crawler excavator, including the boom priority control valve line structure as described in any one in claim 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720159810.0U CN206607627U (en) | 2017-02-22 | 2017-02-22 | A kind of boom priority control valve line structure and hydraulic crawler excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720159810.0U CN206607627U (en) | 2017-02-22 | 2017-02-22 | A kind of boom priority control valve line structure and hydraulic crawler excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206607627U true CN206607627U (en) | 2017-11-03 |
Family
ID=60168312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720159810.0U Expired - Fee Related CN206607627U (en) | 2017-02-22 | 2017-02-22 | A kind of boom priority control valve line structure and hydraulic crawler excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206607627U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106759622A (en) * | 2017-02-22 | 2017-05-31 | 常熟华威履带有限公司 | A kind of boom priority controls valve line structure and hydraulic crawler excavator |
-
2017
- 2017-02-22 CN CN201720159810.0U patent/CN206607627U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106759622A (en) * | 2017-02-22 | 2017-05-31 | 常熟华威履带有限公司 | A kind of boom priority controls valve line structure and hydraulic crawler excavator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103993623B (en) | Excavator, bucket hydraulic system thereof and method for controlling bucket excavating speed of excavator | |
| CN101392772B (en) | Hydraulic control device of working machine | |
| CN107208673A (en) | The fluid power system of Work machine | |
| KR101755424B1 (en) | Hydraulic drive device for hydraulic excavator | |
| CN102140808B (en) | Device for enhancing excavation-handling characteristics and levelling operation characteristics of excavator | |
| JP7186504B2 (en) | Excavator | |
| JP2012172491A (en) | Hydraulic control device of construction machine | |
| CN109804167A (en) | Hydraulic excavator drive system | |
| CN110036211B (en) | Hydraulic shovel drive system | |
| CN106545041B (en) | hydraulic control system and excavator | |
| JP2010078035A (en) | Hydraulic cylinder control circuit of utility machine | |
| CN105960535B (en) | Hydraulic excavator drive system | |
| JP2011220356A (en) | Hydraulic control device of construction machine | |
| JP4384977B2 (en) | Hydraulic drive | |
| CN206607627U (en) | A kind of boom priority control valve line structure and hydraulic crawler excavator | |
| CN214497668U (en) | Loader hydraulic system and loader | |
| CN201193334Y (en) | Three-pump confluence control device for dredger | |
| JP2015172400A (en) | Shovel | |
| CN103790196B (en) | A kind of Hydraulic Excavator's Boom potential energy recovery control device | |
| CN106223380A (en) | A kind of hydraulic hybrid excavator system | |
| CN102518612A (en) | Regeneration function implementing device for bucket arm of hydraulic excavator | |
| CN106468062B (en) | Excavator soil-shifting hydraulic system with dozer float function | |
| CN106759622A (en) | A kind of boom priority controls valve line structure and hydraulic crawler excavator | |
| JP2010236607A (en) | Hydraulic control circuit in construction machine | |
| CN102535571A (en) | System and method of regeneration control based on double spools for hydraulic excavator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171103 Termination date: 20180222 |