CN203879826U - Boom hydraulic system and concrete pumping equipment - Google Patents
Boom hydraulic system and concrete pumping equipment Download PDFInfo
- Publication number
- CN203879826U CN203879826U CN201420240426.XU CN201420240426U CN203879826U CN 203879826 U CN203879826 U CN 203879826U CN 201420240426 U CN201420240426 U CN 201420240426U CN 203879826 U CN203879826 U CN 203879826U
- Authority
- CN
- China
- Prior art keywords
- oil
- load
- valve
- hydraulic system
- jib
- 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 - Lifetime
Links
- 238000005086 pumping Methods 0.000 title claims abstract description 17
- 238000000605 extraction Methods 0.000 claims abstract description 13
- 239000012530 fluid Substances 0.000 claims description 35
- 239000002828 fuel tank Substances 0.000 claims description 16
- 239000000945 filler Substances 0.000 claims description 13
- 238000010276 construction Methods 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 58
- 230000009467 reduction Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The utility model discloses a boom hydraulic system and concrete pumping equipment. In the boom hydraulic system, an oil suction port, an oil outlet, a load feedback introduction oil port and an external control oil port are formed in a load sensing variable pump; a first hydraulic control end of a load sensing valve in the load sensing variable pump is internally connected to the load feedback introduction oil port, and a second hydraulic control end is internally connected to the external control oil port; the oil suction port is externally connected to an oil tank; the oil outlet is externally connected to an oil inlet of a main valve, the load feedback introduction oil port is externally connected to a load feedback extraction oil port of the main valve, and the external control oil port is externally connected to the oil inlet or an oil way between the oil inlet and the oil outlet; an oil return port of the main valve is externally connected to the oil tank, and a working oil port of the main valve is externally connected to a boom executive component. According to the boom hydraulic system and the concrete pumping equipment, the influence to control differential pressure of the load sensing valve due to pressure loss produced by the oil way between the oil outlet of the load sensing variable pump and the oil inlet of the main valve can be avoided, and the flow control accuracy of the boom hydraulic system is effectively improved.
Description
Technical field
The utility model relates to engineering machinery jib technical field of hydraulic, particularly a kind of jib hydraulic system and concrete pumping equipment.
Background technique
Concrete mixer is by pumping mechanism, to realize the construction equipment of concrete conveyance, and its hydraulic system can comprise independently hydraulic system of three phases, i.e. main hydraulic system, auxiliary hydraulic system and jib hydraulic system.Wherein, jib hydraulic system is for realizing the action of jib, and at present, jib hydraulic system adopts Loadsensing control scheme conventionally, to improve energy utilization efficiency.
Particularly, existing jib hydraulic system is generally comprised of load-sensing variable pump, main valve and jib executive component (as arm support oil cylinder) etc., wherein, two hydraulic control ends of the load-sensing valve in load-sensing variable pump (flow control valve), an endoporus oil sources (pressure oil duct) that is connected to load-sensing variable pump, another is by the load feedback extraction oil-opening of the external main valve of LS mouth (load feedback introducing hydraulic fluid port) of load-sensing variable pump; The oil outlet of load-sensing variable pump is external in the filler opening of main valve, and the inlet port of load-sensing variable pump and the return opening of main valve are connected to respectively fuel tank, and the actuator port of main valve is connected to jib executive component.
In such scheme, to the oil circuit between the filler opening of main valve, there is unavoidably the pressure loss in the oil outlet of load-sensing variable pump, this pressure loss can exert an influence to the control pressure reduction between two hydraulic control ends of load-sensing valve, thereby affects the Flow-rate adjustment precision of jib hydraulic system.
Therefore, how for existing above-mentioned deficiency, improving, is those skilled in the art's technical problems urgently to be resolved hurrily.
Model utility content
In view of this, one of the purpose of this utility model is to provide a kind of jib hydraulic system, effectively to improve the Flow-rate adjustment precision of jib hydraulic system.
Particularly, described jib hydraulic system comprises load-sensing variable pump, main valve, fuel tank and jib executive component, wherein: on described load-sensing variable pump, be formed with inlet port, oil outlet, load feedback introducing hydraulic fluid port and external control hydraulic fluid port, in the first hydraulic control end of the load-sensing valve in described load-sensing variable pump, be connected to described load feedback and introduce hydraulic fluid port, in the second hydraulic control end of described load-sensing valve, be connected to described external control hydraulic fluid port; Described inlet port is external in described fuel tank, described oil outlet is external in the filler opening of described main valve, described load feedback is introduced the load feedback extraction oil-opening that hydraulic fluid port is external in described main valve, and described external control hydraulic fluid port is external on the oil circuit between described filler opening or described filler opening and described oil outlet; The return opening of described main valve is external in described fuel tank, and the actuator port of described main valve is external in described jib executive component.
Further, on the oil circuit between described filler opening and described oil outlet, be provided with filter.
Further, described main valve is multi-way valve.
Further, described multi-way valve is multi-gang separate slice structure, or multi-joint monolithic construction, or forms by multiple directions flow control valve is in parallel.
Further, described multi-way valve is a plurality of, and described load feedback extraction oil-opening is for obtaining by shuttle valve group the pressure oil that a plurality of described multi-way valve have the load hydraulic fluid port of pressure maximum.
Further, the return opening of described main valve is connected on the oil circuit of described fuel tank and is provided with back pressure valve.
Another object of the present utility model is to provide a kind of concrete pumping equipment, to have better handling, thereby improves operating efficiency.
Particularly, this concrete pumping equipment is provided with the jib hydraulic system described in above-mentioned any one.
Further, this concrete pumping equipment is concrete mixer.
While adopting jib hydraulic system of the present utility model, owing to being provided with load feedback on load-sensing variable pump, introduce hydraulic fluid port and external control hydraulic fluid port, and in load-sensing variable pump, the first hydraulic control end of load-sensing valve introduces by load feedback the load feedback extraction oil-opening that hydraulic fluid port is external in main valve, the second hydraulic control end is external on the filler opening or the oil circuit between this filler opening and the oil outlet of load-sensing variable pump of main valve by external control hydraulic fluid port, thereby the pressure loss that can avoid the oil circuit between the oil outlet of load-sensing variable pump and the filler opening of main valve to produce impacts the control pressure reduction of load-sensing valve, thereby effectively improved the flow control accuracy of jib hydraulic system, contribute to make the flow matches of jib hydraulic system more reasonable, energy-saving effect is better.
Concrete pumping equipment of the present utility model is provided with above-mentioned jib hydraulic system, thereby can improve handling and operating efficiency.
Accompanying drawing explanation
The accompanying drawing that forms a part of the present utility model is used to provide further understanding of the present utility model, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
The principle schematic of a kind of jib hydraulic system that Fig. 1 provides for the utility model embodiment.
Description of reference numerals:
1 load-sensing variable pump
2 main valves
3 filters
4 fuel tanks
11 load-sensing valves
Embodiment
It should be pointed out that in this part to be only the explanation to specific embodiment to the description of concrete structure and description order, should not be considered as that protection domain of the present utility model is had to any restriction.In addition,, under the situation of not conflicting, embodiment and the feature in embodiment in this part can combine mutually.
Please refer to Fig. 1, below in conjunction with accompanying drawing, the utility model embodiment is elaborated.
As shown in Figure 1, this embodiment's jib hydraulic system can comprise load-sensing variable pump 1, main valve 2, fuel tank 4 and jib executive component.
Wherein, on load-sensing variable pump 1, be formed with inlet port I, oil outlet O, load feedback introducing hydraulic fluid port LS and external control hydraulic fluid port X, in the first hydraulic control end of the load-sensing valve 11 in load-sensing variable pump 1, be connected to load feedback and introduce hydraulic fluid port LS, in the second hydraulic control end, be connected to external control hydraulic fluid port X.
Inlet port I is external in fuel tank 4, oil outlet O is external in the oil inlet P of main valve 2 by pipeline, load feedback is introduced the load feedback extraction oil-opening C that hydraulic fluid port LS is external in main valve 2, and external control hydraulic fluid port X is external in the oil inlet P or the oil circuit between this oil inlet P and the oil outlet O of load-sensing variable pump 1 of main valve 2; The oil return inlet T of main valve 2 is external in fuel tank 4, and the actuator port A of main valve 2 and B are external in jib executive component (for example arm support oil cylinder).
In the course of the work, load-sensing variable pump 1 is from fuel tank 4 inhalant liquid force feeds, and pump pressure oil, pressure oil is supplied to jib executive component after the oil inlet P of main valve 2 and one of them actuator port, the oil return of jib executive component is got back in fuel tank 4 after another actuator port of main valve 2 and oil return inlet T, and main valve 2 can change the oil inlet and oil return state of jib executive component; In addition, the oil liquid pressure of the oil inlet P of main valve 2 (or the oil circuit between oil inlet P and oil outlet O) and the oil liquid pressure of load feedback extraction oil-opening C act on respectively to two hydraulic control ends of load-sensing valve 11 in load-sensing variable pump 1, the pressure reduction of these two pressure is for controlling pressure reduction, this control pressure reduction can make the required flow of load-sensing variable pump 1 output loading (being jib executive component), thereby reaches energy-conservation effect.
Compared with prior art, because the first hydraulic control end of the load-sensing valve 11 in load-sensing variable pump 1 introduces by load feedback the load feedback extraction oil-opening C that hydraulic fluid port LS is external in main valve 2, the second hydraulic control end is external in the oil inlet P or the oil circuit between this oil inlet P and the oil outlet O of load-sensing variable pump 1 of main valve 2 by external control hydraulic fluid port X, thereby the pressure loss that can avoid the oil circuit between the oil outlet O of load-sensing variable pump 1 and the oil inlet P of main valve 2 to produce impacts the control pressure reduction of load-sensing valve 11, thereby effectively improved the flow control accuracy of jib hydraulic system, also contribute to make the flow matches of jib hydraulic system more reasonable, energy-saving effect is better.
It should be noted that, in specific implementation process, above-described embodiment can also adopt following at least one scheme:
One, can on the oil circuit between the oil outlet O of load-sensing variable pump 1 and the oil inlet P of main valve 2, filter 3 be set, this filter 3 is high pressure filter, can filter the pressure oil of load-sensing variable pump 1 output like this, improve the turbidity test of pressure oil.
Two, main valve 2 can adopt multi-way valve; Further, this multi-way valve can be multi-gang separate slice structure, can be also multi-joint monolithic construction, or also can form by multiple directions flow control valve is in parallel.On this basis, multi-way valve can for a plurality of (for example, corresponding with the jib joint quantity of arm or the number of arm support oil cylinder), load feedback extraction oil-opening C can obtain by shuttle valve group the pressure oil of the load hydraulic fluid port (actuator port) in a plurality of multi-way valve with pressure maximum, so that the hydraulic oil of this pressure is introduced hydraulic fluid port LS effect to the spring chamber (i.e. the first hydraulic control end) of load-sensing valve 11 through the load feedback of load-sensing variable pump 1, for example, the jib that is applied to have 5 joints joint arms of take is example, the number of multi-way valve is 5 and is respectively the first multi-way valve, the second multi-way valve, the 3rd multi-way valve, the 4th multi-way valve and the 5th multi-way valve, shuttle valve group comprises 4 shuttle valves and is respectively the first shuttle valve, the second shuttle valve, the 3rd shuttle valve and the 4th shuttle valve, wherein: two input ends of the first shuttle valve are connected to respectively the load hydraulic fluid port of the first multi-way valve and the load hydraulic fluid port of the second multi-way valve, two input ends of the second shuttle valve are connected to respectively the load hydraulic fluid port of the 3rd multi-way valve and the load hydraulic fluid port of the 4th multi-way valve, two input ends of the 3rd shuttle valve are connected to respectively the output terminal of the first shuttle valve and the output terminal of the second shuttle valve, two input ends of the 4th shuttle valve are connected to respectively the output terminal of the 3rd shuttle valve and the load hydraulic fluid port of the 5th multi-way valve, the output terminal of the 4th shuttle valve is connected to load feedback extraction oil-opening C, the shuttle valve group forming by 4 shuttle valves like this, load feedback extraction oil-opening C can obtain the pressure oil of the load hydraulic fluid port in each multi-way valve with pressure maximum.
Three, in order to make the oil return of main valve 2 there is certain back pressure, can be connected in the oil return inlet T of main valve 2 on the oil circuit of fuel tank 4 and be provided with back pressure valve, for example, this back pressure valve can adopt one-way valve (situation as shown in Figure 1).
The utility model is other embodiments also provide a kind of concrete pumping equipment, as concrete mixer, this concrete pumping equipment is provided with the jib hydraulic system described in above-described embodiment, because above-mentioned jib hydraulic system has above-mentioned technique effect, therefore, this concrete pumping equipment can improve handling and operating efficiency, and the specific implementation process of its appropriate section is similar to the above embodiments, the specific implementation process of other parts can, referring to the associated description of prior art, hereby not repeat.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (8)
1. a jib hydraulic system, is characterized in that, described jib hydraulic system comprises load-sensing variable pump (1), main valve (2), fuel tank (4) and jib executive component, wherein:
On described load-sensing variable pump (1), be formed with inlet port (I), oil outlet (O), load feedback introducing hydraulic fluid port (LS) and external control hydraulic fluid port (X), in the first hydraulic control end of the load-sensing valve (11) in described load-sensing variable pump (1), be connected to described load feedback and introduce hydraulic fluid port (LS), in the second hydraulic control end of described load-sensing valve (11), be connected to described external control hydraulic fluid port (X);
Described inlet port (I) is external in described fuel tank (4), described oil outlet (O) is external in the filler opening (P) of described main valve (2), described load feedback is introduced the load feedback extraction oil-opening (C) that hydraulic fluid port (LS) is external in described main valve (2), and described external control hydraulic fluid port (X) is external on the oil circuit between described filler opening (P) or described filler opening (P) and described oil outlet (O); The return opening (T) of described main valve (2) is external in described fuel tank (4), and the actuator port of described main valve (2) is external in described jib executive component.
2. jib hydraulic system as claimed in claim 1, is characterized in that, on the oil circuit between described filler opening (P) and described oil outlet (O), is provided with filter (3).
3. jib hydraulic system as claimed in claim 1, is characterized in that, described main valve (2) is multi-way valve.
4. jib hydraulic system as claimed in claim 3, is characterized in that, described multi-way valve is multi-gang separate slice structure, or multi-joint monolithic construction, or forms by multiple directions flow control valve is in parallel.
5. jib hydraulic system as claimed in claim 3, is characterized in that, described multi-way valve is a plurality of, and described load feedback extraction oil-opening (C) is for obtaining the pressure oil that a plurality of described multi-way valve have the load hydraulic fluid port of pressure maximum by shuttle valve group.
6. jib hydraulic system as claimed in claim 1, is characterized in that, the return opening (T) of described main valve (2) is connected on the oil circuit of described fuel tank (4) and is provided with back pressure valve.
7. a concrete pumping equipment, is characterized in that, described concrete pumping sets and is provided with claim 1 to 6 any one jib hydraulic system.
8. concrete pumping equipment as claimed in claim 7, is characterized in that, described concrete pumping equipment is concrete mixer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420240426.XU CN203879826U (en) | 2014-05-12 | 2014-05-12 | Boom hydraulic system and concrete pumping equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420240426.XU CN203879826U (en) | 2014-05-12 | 2014-05-12 | Boom hydraulic system and concrete pumping equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203879826U true CN203879826U (en) | 2014-10-15 |
Family
ID=51680327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420240426.XU Expired - Lifetime CN203879826U (en) | 2014-05-12 | 2014-05-12 | Boom hydraulic system and concrete pumping equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203879826U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454696A (en) * | 2014-10-17 | 2015-03-25 | 燕山大学 | Hydraulic energy-saving control system of cable reeling and unreeling vehicle |
| CN105221502A (en) * | 2014-10-30 | 2016-01-06 | 徐州重型机械有限公司 | Load sensitive system and hoisting system protecting against shock controlling method |
-
2014
- 2014-05-12 CN CN201420240426.XU patent/CN203879826U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454696A (en) * | 2014-10-17 | 2015-03-25 | 燕山大学 | Hydraulic energy-saving control system of cable reeling and unreeling vehicle |
| CN105221502A (en) * | 2014-10-30 | 2016-01-06 | 徐州重型机械有限公司 | Load sensitive system and hoisting system protecting against shock controlling method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102996553B (en) | Support leg hydraulic system and engineering machinery | |
| CN103591083A (en) | Hydraulic test stand for oil cylinders | |
| CN103089729A (en) | Quantified system load sensitive multi-way reversing valve | |
| CN203879826U (en) | Boom hydraulic system and concrete pumping equipment | |
| CN202833434U (en) | Hydraulic system and engineering machinery | |
| CN203130636U (en) | Engineering machinery equipment and hydraulic control loop thereof | |
| CN203570713U (en) | Load sensing hydraulic control system and engineering machine | |
| CN201739265U (en) | Single triple fixed displacement pump oil supply device for development machine | |
| CN103511379B (en) | A kind of crane, hydraulic system and switching valve | |
| CN203516247U (en) | Bulldozer hydraulic sensing device | |
| CN102588364B (en) | Hydraulic synchronous independent control device, synchronous hydraulic system and crane | |
| CN105508329B (en) | Pumps hydraulic control system and concrete pumping equipment | |
| CN104314898A (en) | Crane and single-cylinder plug pin type extension and retraction mechanism hydraulic control system of crane | |
| CN204431683U (en) | A kind of injection machine servo oil circuit control structure | |
| CN205466701U (en) | Ceramic brick machine's hydraulic drive system | |
| CN210265310U (en) | Multi-pump confluence hydraulic station device | |
| CN204153410U (en) | A kind of wonderful stage Electronic display screen hydraulic lifting system | |
| CN202732519U (en) | Hydraulic valve, hydraulic valve group, hydraulic system and engineering machine | |
| CN103541941B (en) | The many machining device hydraulic systems of many pumps that a kind of total output controls | |
| CN106246621A (en) | Hydraulic circuit and engineering machinery for engineering machinery | |
| CN202768536U (en) | Oil cylinder hydraulic test bench | |
| CN102705305B (en) | Two-pump flowrate automatic control system | |
| CN205078520U (en) | Hydraulic pressure oil circuit of hydraulically operated fixture | |
| CN203962522U (en) | On loader for the hydraulic work system of cleaning agency | |
| CN109356218A (en) | Loading machine distributing valve and loader hydraulic system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141015 |