CN203049435U - Hydraulic circuit for tail door mechanism of pavement milling machine - Google Patents
Hydraulic circuit for tail door mechanism of pavement milling machine Download PDFInfo
- Publication number
- CN203049435U CN203049435U CN 201220637937 CN201220637937U CN203049435U CN 203049435 U CN203049435 U CN 203049435U CN 201220637937 CN201220637937 CN 201220637937 CN 201220637937 U CN201220637937 U CN 201220637937U CN 203049435 U CN203049435 U CN 203049435U
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- China
- Prior art keywords
- hydraulic cylinder
- solenoid operated
- operated directional
- directional valve
- mouth
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- 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
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Abstract
The utility model discloses a hydraulic circuit for a tail door mechanism of a pavement milling machine. The hydraulic circuit comprises a hydraulic cylinder I and a hydraulic cylinder II, wherein a rod cavity of the hydraulic cylinder I, a rod cavity of the hydraulic cylinder II, a C port of an electromagnetic reversing valve I and a G port of an electromagnetic reversing valve are communicated with one another by an oil way; a rodless cavity of the hydraulic cylinder I, a rodless cavity of the hydraulic cylinder II, a D port of the electromagnetic reversing valve I and an H port of the electromagnetic reversing valve are communicated with one another by an oil way; an A port of the electromagnetic reversing valve I is communicated with an oil inlet pipe; a B port of the electromagnetic reversing valve I, and an E port and an F port of the electromagnetic reversing valve II are all communicated with an oil return tank; and the oil ways which are externally connected with the rod cavities of the hydraulic cylinder I and II and the rodless cavities of the hydraulic cylinder II are respectively provided with a two-way hydraulic lock. The hydraulic circuit has the following characteristics that oil supply sources do not need to be separately supplied, energy consumption is less, control precision is high, the control process stability and the running process stability are high, the driving power of the hydraulic cylinders can be adjusted in a self-adaptive manner, and automation level is high.
Description
Technical field
The utility model belongs to technical field of engineering machinery, relates to a kind of hydraulic circuit, is specifically related to a kind of end gate of pavement milling and planning machine mechanism hydraulic circuit.
Background technology
At present, along with Chinese economic development, the enhancing of overall national strength, maximize in small towns urbanization, small and medium-sized cities, the trend of big and medium-sized cities gardenization is day by day obvious, and the reconstruction and extension project of urban road is also more and more; Nowadays a lot of provinces, China's Mainland all carry out the transition to the stage of " supporting " from " building " such as the highway construction on ground such as Zhejiang, Jiangsu, Henan; " producing again " of speedway is also more general, in expressway construction, for satisfying the demand of ecological construction, the pitch that tends to that milling is come out drops into processing again and uses, pavement milling machine is one of road machine maintenance imperative equipment, but the end gate of pavement milling and planning machine tail-gate exists when scraper is advanced: problem such as the milling material rate of recovery is low, the groove out-of-flatness of milling road, scraper resistance are bigger than normal.
The utility model content
The purpose of this utility model is to overcome above-mentioned deficiency of the prior art, a kind of end gate of pavement milling and planning machine mechanism hydraulic circuit is provided, and it is reasonable in design, does not need independent oil supply source, consuming little energy, running cost is low, and electrical control system is simple in structure, the control accuracy height, control procedure and running stationarity height, but self adaptation regulator solution cylinder pressure driving force, the automaticity height reduces operator's labour intensity.
For achieving the above object, the technical solution adopted in the utility model is: a kind of end gate of pavement milling and planning machine mechanism hydraulic circuit, comprise for the hydraulic cylinder one and the hydraulic cylinder two that drive tail-gate mechanism, it is characterized in that: the rod chamber of described hydraulic cylinder one, the rod chamber of described hydraulic cylinder two, the C mouth of solenoid operated directional valve one and the G mouth of solenoid operated directional valve two are interconnected by oil circuit, the rodless cavity of described hydraulic cylinder one, the rodless cavity of described hydraulic cylinder two, the D mouth of solenoid operated directional valve one and the H mouth of solenoid operated directional valve two are interconnected by oil circuit, the A mouth of described solenoid operated directional valve one is communicated with oil inlet pipe, the B mouth of described solenoid operated directional valve one, the E mouth of described solenoid operated directional valve two and the F mouth of described solenoid operated directional valve two all are communicated with oil sump tank, the external oil circuit of the rodless cavity of the rod chamber of described hydraulic cylinder one and described hydraulic cylinder two and described hydraulic cylinder one and described hydraulic cylinder two is provided with bidirectional hydraulic lock, the external oil circuit of rod chamber of described hydraulic cylinder one and described hydraulic cylinder two is provided with pressure sensor one, and the external oil circuit of rodless cavity of described hydraulic cylinder one and described hydraulic cylinder two is provided with and pressure sensor two.
Above-mentioned end gate of pavement milling and planning machine mechanism hydraulic circuit, it is characterized in that: be respectively arranged with import one-way throttle valve one and import one-way throttle valve two on the external oil circuit of described solenoid operated directional valve one C mouth and D mouth, be respectively arranged with outlet one-way throttle valve one and outlet one-way throttle valve two on the external oil circuit of described solenoid operated directional valve two G mouths and H mouth.
Above-mentioned end gate of pavement milling and planning machine mechanism hydraulic circuit is characterized in that: described solenoid operated directional valve one is the 3-position 4-way solenoid operated directional valve, and described solenoid operated directional valve two is the two-bit triplet solenoid operated directional valve.
The utility model compared with prior art has the following advantages:
(1) this end gate of pavement milling and planning machine mechanism is very reasonable with Hydraulic Circuit Design, does not need independent oil supply source, greatly reduces energy consumption, and running cost is low.
(2) this end gate of pavement milling and planning machine mechanism is simple in structure with the hydraulic circuit electrical control system, and the control accuracy height is provided with a plurality of one-way throttle valves in the system, speed, control procedure and the running stationarity height of control oil-feed and oil return.
(3) but this end gate of pavement milling and planning machine mechanism with hydraulic circuit self adaptation regulator solution cylinder pressure driving force, make tail-gate constant voltage ground connection, automaticity is very high, reduces operator's labour intensity.
Below by drawings and Examples, the utility model is described in further detail.
Description of drawings
Fig. 1 is hydraulic control principle schematic of the present utility model.
Description of reference numerals:
1-hydraulic cylinder one; 2-hydraulic cylinder two; 3-import one-way throttle valve one;
4-import one-way throttle valve two; 5-exports one-way throttle valve one; 6-exports one-way throttle valve two;
7-solenoid operated directional valve one; 8-solenoid operated directional valve two; The 9-bidirectional hydraulic lock;
10-pressure sensor one; 11-pressure sensor two.
The specific embodiment
A kind of end gate of pavement milling and planning machine mechanism hydraulic circuit as shown in Figure 1, comprise for the hydraulic cylinder 1 and the hydraulic cylinder 22 that drive tail-gate mechanism, the rod chamber of described hydraulic cylinder 1, the rod chamber of described hydraulic cylinder 22, the C mouth of solenoid operated directional valve 1 and the G mouth of solenoid operated directional valve 28 are interconnected by oil circuit, the rodless cavity of described hydraulic cylinder 1, the rodless cavity of described hydraulic cylinder 22, the D mouth of solenoid operated directional valve 1 and the H mouth of solenoid operated directional valve 28 are interconnected by oil circuit, the A mouth of described solenoid operated directional valve 1 is communicated with oil inlet pipe, the B mouth of described solenoid operated directional valve 1, the E mouth of described solenoid operated directional valve 28 and the F mouth of described solenoid operated directional valve 28 all are communicated with oil sump tank, the external oil circuit of the rodless cavity of the rod chamber of described hydraulic cylinder 1 and described hydraulic cylinder 22 and described hydraulic cylinder 1 and described hydraulic cylinder 22 is provided with bidirectional hydraulic lock 9, the external oil circuit of rod chamber of described hydraulic cylinder 1 and described hydraulic cylinder 22 is provided with pressure sensor 1, and the external oil circuit of rodless cavity of described hydraulic cylinder 1 and described hydraulic cylinder 22 is provided with and pressure sensor 2 11.
As shown in Figure 1, be respectively arranged with import one-way throttle valve 1 and import one-way throttle valve 24 on the C mouth of described solenoid operated directional valve 1 and the external oil circuit of D mouth, be respectively arranged with outlet one-way throttle valve 1 and outlet one-way throttle valve 26 on the G mouth of described solenoid operated directional valve 28 and the external oil circuit of H mouth.
As shown in Figure 1, described solenoid operated directional valve 1 is the 3-position 4-way solenoid operated directional valve, and described solenoid operated directional valve 28 is the two-bit triplet solenoid operated directional valve.
The utility model end gate of pavement milling and planning machine mechanism with the course of work of hydraulic circuit is: when pavement milling machine begins operation, controller control solenoid operated directional valve 28 left side connecting system, the rodless cavity of hydraulic cylinder 1 and described hydraulic cylinder 22 and rod chamber all take back fuel tank, tail-gate drops to the road surface under the effect of deadweight, pressure sensor 1 begins to monitor the pressure of hydraulic cylinder 1 and hydraulic cylinder 22 rod chambers, and by automatic control circuit the signal of its collection is compared processing.Owing to just begun the ground pressure that the pressure of tail-gate deadweight generation is set greater than tail-gate, the pressure of the hydraulic cylinder 1 that pressure sensor 1 records and hydraulic cylinder 22 rod chambers is less than the median of setting, position, the left side connecting system of controller control this moment solenoid operated directional valve 1, pressure oil enters hydraulic cylinder 1 and hydraulic cylinder 22 rod chambers, and tail-gate is upwards promoted.
When the pressure of hydraulic cylinder 1 and hydraulic cylinder 22 rod chambers reaches the median of setting, the meta connecting system of controller control solenoid operated directional valve 1, the right position connecting system of controller control solenoid operated directional valve 28, the rod chamber of hydraulic cylinder 1 and hydraulic cylinder 22 and rodless cavity are all shut, and keep default pressure.If tail-gate does not run into fortuitous event, the tail-gate ground pressure will carry out work according to this middle duty pressure that presets.
Yet in the pavement milling machine operation process, the tail-gate ground pressure can change along with the operation working conditions change, thereby has caused the variation of hydraulic cylinder 1 and hydraulic cylinder 22 pressure.When the pressure of hydraulic cylinder 1 and hydraulic cylinder 22 rod chambers during greater than the maximum value set, the right position connecting system of controller control solenoid operated directional valve 1, position, the left side connecting system of controller control solenoid operated directional valve 28, the rod chamber of hydraulic cylinder 1 and hydraulic cylinder 22 and rodless cavity take back fuel tank simultaneously, hydraulic oil in hydraulic cylinder 1 and hydraulic cylinder 22 rod chambers is by one 5 off-loads of outlet one-way throttle valve, pressure in hydraulic cylinder 1 and hydraulic cylinder 22 rod chambers decreases, hydraulic cylinder 1 and hydraulic cylinder 22 rodless cavities are by 24 repairings of import one-way throttle valve simultaneously, the median of getting back to setting up to the pressure of fluid cylinder pressure 1 and hydraulic cylinder 22 rod chambers, controller control solenoid operated directional valve one 7 meta connecting systems, controller control solenoid operated directional valve 28 a right connecting system, at this moment, the pressure of fluid cylinder pressure 1 and hydraulic cylinder 22 rod chambers remains on the median of setting.
The above; it only is preferred embodiment of the present utility model; be not that the utility model is imposed any restrictions; every according to the utility model technical spirit to any simple modification, change and equivalent structure transformation that above embodiment does, all still belong in the protection domain of technical solutions of the utility model.
Claims (3)
1. end gate of pavement milling and planning machine mechanism hydraulic circuit, comprise for the hydraulic cylinder one (1) and the hydraulic cylinder two (2) that drive tail-gate mechanism, it is characterized in that: the rod chamber of described hydraulic cylinder one (1), the rod chamber of described hydraulic cylinder two (2), the G mouth of the C mouth of solenoid operated directional valve one (7) and solenoid operated directional valve two (8) is interconnected by oil circuit, the rodless cavity of described hydraulic cylinder one (1), the rodless cavity of described hydraulic cylinder two (2), the H mouth of the D mouth of solenoid operated directional valve one (7) and solenoid operated directional valve two (8) is interconnected by oil circuit, the A mouth of described solenoid operated directional valve one (7) is communicated with oil inlet pipe, the B mouth of described solenoid operated directional valve one (7), the F mouth of the E mouth of described solenoid operated directional valve two (8) and described solenoid operated directional valve two (8) all is communicated with oil sump tank, the external oil circuit of the rodless cavity of the rod chamber of described hydraulic cylinder one (1) and described hydraulic cylinder two (2) and described hydraulic cylinder one (1) and described hydraulic cylinder two (2) is provided with bidirectional hydraulic lock (9), the external oil circuit of rod chamber of described hydraulic cylinder one (1) and described hydraulic cylinder two (2) is provided with pressure sensor one (10), and the external oil circuit of rodless cavity of described hydraulic cylinder one (1) and described hydraulic cylinder two (2) is provided with and pressure sensor two (11).
2. according to the described end gate of pavement milling and planning machine of claim 1 mechanism hydraulic circuit, it is characterized in that: be respectively arranged with import one-way throttle valve one (3) and import one-way throttle valve two (4) on the external oil circuit of described solenoid operated directional valve one (7) C mouth and D mouth, be respectively arranged with outlet one-way throttle valve one (5) and outlet one-way throttle valve two (6) on the external oil circuit of described solenoid operated directional valve two (8) G mouths and H mouth.
3. according to the described end gate of pavement milling and planning machine of claim 1 mechanism hydraulic circuit, it is characterized in that: described solenoid operated directional valve one (7) is the 3-position 4-way solenoid operated directional valve, and described solenoid operated directional valve two (8) is the two-bit triplet solenoid operated directional valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220637937 CN203049435U (en) | 2012-11-27 | 2012-11-27 | Hydraulic circuit for tail door mechanism of pavement milling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220637937 CN203049435U (en) | 2012-11-27 | 2012-11-27 | Hydraulic circuit for tail door mechanism of pavement milling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203049435U true CN203049435U (en) | 2013-07-10 |
Family
ID=48732406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220637937 Expired - Fee Related CN203049435U (en) | 2012-11-27 | 2012-11-27 | Hydraulic circuit for tail door mechanism of pavement milling machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203049435U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422527A (en) * | 2015-12-10 | 2016-03-23 | 湖南航天磁电有限责任公司 | Pneumatic position servosystem |
-
2012
- 2012-11-27 CN CN 201220637937 patent/CN203049435U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422527A (en) * | 2015-12-10 | 2016-03-23 | 湖南航天磁电有限责任公司 | Pneumatic position servosystem |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20131127 |