CN204401426U - The hydraulic drive type tail-gate of asphalt road plane milling machine - Google Patents
The hydraulic drive type tail-gate of asphalt road plane milling machine Download PDFInfo
- Publication number
- CN204401426U CN204401426U CN201420760635.7U CN201420760635U CN204401426U CN 204401426 U CN204401426 U CN 204401426U CN 201420760635 U CN201420760635 U CN 201420760635U CN 204401426 U CN204401426 U CN 204401426U
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- China
- Prior art keywords
- directional valve
- solenoid operated
- operated directional
- working port
- gate
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- Expired - Fee Related
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Abstract
The utility model discloses a kind of hydraulic drive type tail-gate of asphalt road plane milling machine, comprise tail-gate and hydraulic cylinder, the piston rod end of described hydraulic cylinder is fixedly connected with described tail-gate, the rod chamber of described hydraulic cylinder is communicated with the 3rd working port of solenoid operated directional valve two with the 3rd working port of solenoid operated directional valve one respectively, the rodless cavity of described hydraulic cylinder is communicated with the 4th working port of solenoid operated directional valve two with the 4th working port of solenoid operated directional valve one respectively, first working port of described solenoid operated directional valve one is communicated with in-line, the external pipeline of the 3rd working port of described solenoid operated directional valve one and the 4th working port of described solenoid operated directional valve one is provided with bidirectional hydraulic lock.The utility model has following characteristics: do not need independent oil supply source, consuming little energy, control accuracy is high, control procedure and running stationarity high, can Automatic adjusument Driven by Hydraulic Cylinder power, automaticity 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 hydraulic drive type tail-gate of asphalt road plane milling machine.
Background technology
At present, along with China's expanding economy, the enhancing of overall national strength, small towns urbanization, small and medium-sized cities are maximized, the trend in garden, big and medium-sized cities is day by day obvious, and the reconstruction and extension project of urban road also gets more and more; Nowadays the highway construction on the ground such as a lot of province, China's Mainland such as Zhejiang, Jiangsu, Henan is all transitioned into the stage of " supporting " from " building "; " regenerative ratio " of speedway is also more general, in the construction of speedway, for meeting the demand of ecological construction, often milling pitch is out dropped into again processing to use, pavement milling machine is one of requisite equipment of road machine maintenance, but end gate of pavement milling and planning machine tail-gate exists when scraper is advanced: the 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.
Utility model content
The purpose of this utility model is to overcome above-mentioned deficiency of the prior art, there is provided a kind of hydraulic drive type tail-gate of asphalt road plane milling machine, it is reasonable in design, does not need independent oil supply source, consuming little energy, running cost is low, and electrical control system structure is simple, and control accuracy is high, control procedure and running stationarity high, can Automatic adjusument Driven by Hydraulic Cylinder power, automaticity is high, reduces operator's labour intensity.
For achieving the above object, the technical solution adopted in the utility model is: a kind of hydraulic drive type tail-gate of asphalt road plane milling machine, comprise for applying pressure to groove milling bottom surface and reclaiming the tail-gate of milling material and the hydraulic cylinder for driving described tail-gate to move up and down, it is characterized in that: the piston rod end of described hydraulic cylinder is fixedly connected with described tail-gate, the rod chamber of described hydraulic cylinder is communicated with the 3rd working port of solenoid operated directional valve two with the 3rd working port of solenoid operated directional valve one respectively, the rodless cavity of described hydraulic cylinder is communicated with the 4th working port of solenoid operated directional valve two with the 4th working port of solenoid operated directional valve one respectively, the external pipeline of described hydraulic cylinder rod chamber is provided with pressure sensor one, the external pipeline of described hydraulic cylinder rodless cavity is provided with pressure sensor two, first working port of described solenoid operated directional valve one is communicated with in-line, second working port of described solenoid operated directional valve one, first working port of solenoid operated directional valve two is all communicated with return line with the second working port of solenoid operated directional valve two, the external pipeline of the 3rd working port of described solenoid operated directional valve one and the 4th working port of described solenoid operated directional valve one is provided with bidirectional hydraulic lock.
The hydraulic drive type tail-gate of above-mentioned asphalt road plane milling machine, is characterized in that: the connecting line between the 3rd working port of described solenoid operated directional valve one and the 3rd working port of described solenoid operated directional valve two be symmetrically arranged with entrance one-way throttle valve one and export one-way throttle valve one.
The hydraulic drive type tail-gate of above-mentioned asphalt road plane milling machine, is characterized in that: the connecting line between the 4th working port of described solenoid operated directional valve one and the 4th working port of described solenoid operated directional valve two be symmetrically arranged with entrance one-way throttle valve two and export one-way throttle valve two.
The hydraulic drive type tail-gate of above-mentioned asphalt road plane milling machine, is characterized in that: described solenoid operated directional valve one is three-position four-way electromagnetic directional valve, and described solenoid operated directional valve two is two-bit triplet solenoid operated directional valve.
The utility model compared with prior art has the following advantages:
(1) the hydraulic drive type tail-gate design of this asphalt road plane milling machine is very reasonable, and do not need independent oil supply source, greatly reduce energy ezpenditure, running cost is low.
(2) the hydraulic drive type tail-gate electrical control system structure of this asphalt road plane milling machine is simple, and control accuracy is high, is provided with multiple one-way throttle valve in system, controls the speed of oil-feed and oil return, control procedure and running stationarity high.
(3) the hydraulic drive type tail-gate of this asphalt road plane milling machine can Automatic adjusument Driven by Hydraulic Cylinder power, and make tail-gate constant-pressure ground, automaticity is very high, reduces the labour intensity of operator.
Below by drawings and Examples, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is hydraulic control principle schematic of the present utility model.
Description of reference numerals:
1-tail-gate; 2-hydraulic cylinder; 3-entrance one-way throttle valve one;
4-entrance 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; 9-exports bidirectional hydraulic lock;
10-pressure sensor one; 11-pressure sensor two.
Detailed description of the invention
The hydraulic drive type tail-gate of a kind of asphalt road plane milling machine as shown in Figure 1, comprise for applying pressure to groove milling bottom surface and reclaiming the tail-gate 1 of milling material and the hydraulic cylinder 2 for driving described tail-gate 1 to move up and down, the piston rod end of described hydraulic cylinder 2 is fixedly connected with described tail-gate 1, the rod chamber of described hydraulic cylinder 2 is communicated with the G mouth of solenoid operated directional valve 28 with the C mouth of solenoid operated directional valve 1 respectively, the rodless cavity of described hydraulic cylinder 2 is communicated with the H mouth of solenoid operated directional valve 28 with the D mouth of solenoid operated directional valve 1 respectively, the external pipeline of described hydraulic cylinder 2 rod chamber is provided with pressure sensor 1, the external pipeline of described hydraulic cylinder 2 rodless cavity is provided with pressure sensor 2 11, the A mouth of described solenoid operated directional valve 1 is communicated with in-line, the B mouth of described solenoid operated directional valve 1, the E mouth of solenoid operated directional valve 28 is all communicated with return line with the F mouth of solenoid operated directional valve 28, the external pipeline of the C mouth of described solenoid operated directional valve 1 and the D mouth of described solenoid operated directional valve 1 is provided with outlet bidirectional hydraulic lock 9.
In the present embodiment, the connecting line between the 3rd working port of described solenoid operated directional valve 1 and the 3rd working port of described solenoid operated directional valve 28 be symmetrically arranged with entrance one-way throttle valve 1 and export one-way throttle valve 1.
In the present embodiment, the connecting line between the 4th working port of described solenoid operated directional valve 1 and the 4th working port of described solenoid operated directional valve 28 be symmetrically arranged with entrance one-way throttle valve 24 and export one-way throttle valve 26.
In the present embodiment, described solenoid operated directional valve 1 is three-position four-way electromagnetic directional valve, and described solenoid operated directional valve 28 is two-bit triplet solenoid operated directional valve.
The course of work of the hydraulic drive type tail-gate of the utility model asphalt road plane milling machine is: when asphalt road plane milling machine starts operation, solenoid operated directional valve 28 left connecting systems, rodless cavity and the rod chamber of hydraulic cylinder 2 all take back fuel tank, tail-gate 1 drops to road surface under the effect of deadweight, pressure sensor 1 starts the pressure of monitoring hydraulic cylinder 2 rod chamber, and compares process by automatic control circuit to the signal that it gathers.The pressure produced owing to just starting tail-gate 1 deadweight is greater than the ground pressure that tail-gate 1 sets, when the pressure of hydraulic cylinder 2 rod chamber that pressure sensor 1 records is less than the median of setting, controller controls the left position connecting system of solenoid operated directional valve 1, pressure oil enters the rod chamber of hydraulic cylinder 2, and tail-gate is upwards promoted.
When the pressure of hydraulic cylinder 2 rod chamber reaches the median of setting, the meta of solenoid operated directional valve 1 and the right position of solenoid operated directional valve 28 connecting system simultaneously, the rod chamber of hydraulic cylinder 2 and rodless cavity are all shut, and keep the pressure preset.If tail-gate 1 does not run into fortuitous event, the ground pressure of tail-gate 1 can carry out work according to the median pressure preset.
But in pavement milling machine operation process, tail-gate ground pressure can change along with working condition change, thus causes the change of hydraulic cylinder 2 pressure.When the pressure of hydraulic cylinder 2 rod chamber is greater than the maximum value of setting, the right position of solenoid operated directional valve 1 and the left position of solenoid operated directional valve 28 connecting system simultaneously, rod chamber and the rodless cavity of hydraulic cylinder 2 take back fuel tank simultaneously, hydraulic oil in hydraulic cylinder 2 rod chamber is by the off-load of outlet one-way throttle valve 1, pressure in hydraulic cylinder 2 rod chamber decreases, hydraulic cylinder 2 rodless cavity is by entrance one-way throttle valve 24 repairing simultaneously, until the pressure of hydraulic cylinder 2 rod chamber gets back to setting value, now solenoid operated directional valve 1 meta and the right position of solenoid operated directional valve 28 connecting system simultaneously, now, the pressure of hydraulic cylinder 2 rod chamber remains on the median of setting.
The above; it is only preferred embodiment of the present utility model; not the utility model is imposed any restrictions; every above embodiment is done according to the utility model technical spirit any simple modification, change and equivalent structure transformation, all still belong in the protection domain of technical solutions of the utility model.
Claims (4)
1. the hydraulic drive type tail-gate of an asphalt road plane milling machine, comprise for applying pressure to groove milling bottom surface and reclaiming the tail-gate (1) of milling material and the hydraulic cylinder (2) for driving described tail-gate (1) to move up and down, it is characterized in that: the piston rod end of described hydraulic cylinder (2) is fixedly connected with described tail-gate (1), the rod chamber of described hydraulic cylinder (2) is communicated with the 3rd working port of solenoid operated directional valve two (8) with the 3rd working port of solenoid operated directional valve one (7) respectively, the rodless cavity of described hydraulic cylinder (2) is communicated with the 4th working port of solenoid operated directional valve two (8) with the 4th working port of solenoid operated directional valve one (7) respectively, the external pipeline of described hydraulic cylinder (2) rod chamber is provided with pressure sensor one (10), the external pipeline of described hydraulic cylinder (2) rodless cavity is provided with pressure sensor two (11), first working port of described solenoid operated directional valve one (7) is communicated with in-line, second working port of described solenoid operated directional valve one (7), first working port of solenoid operated directional valve two (8) is all communicated with return line with the second working port of solenoid operated directional valve two (8), the external pipeline of the 3rd working port of described solenoid operated directional valve one (7) and the 4th working port of described solenoid operated directional valve one (7) is provided with bidirectional hydraulic lock (9).
2. according to the hydraulic drive type tail-gate of asphalt road plane milling machine according to claim 1, it is characterized in that: the connecting line between the 3rd working port of described solenoid operated directional valve one (7) and the 3rd working port of described solenoid operated directional valve two (8) be symmetrically arranged with entrance one-way throttle valve one (3) and export one-way throttle valve one (5).
3. according to the hydraulic drive type tail-gate of asphalt road plane milling machine according to claim 1, it is characterized in that: the connecting line between the 4th working port of described solenoid operated directional valve one (7) and the 4th working port of described solenoid operated directional valve two (8) be symmetrically arranged with entrance one-way throttle valve two (4) and export one-way throttle valve two (6).
4. according to the hydraulic drive type tail-gate of asphalt road plane milling machine according to claim 1, it is characterized in that: described solenoid operated directional valve one (7) is three-position four-way electromagnetic directional valve, described solenoid operated directional valve two (8) is two-bit triplet solenoid operated directional valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420760635.7U CN204401426U (en) | 2014-12-04 | 2014-12-04 | The hydraulic drive type tail-gate of asphalt road plane milling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420760635.7U CN204401426U (en) | 2014-12-04 | 2014-12-04 | The hydraulic drive type tail-gate of asphalt road plane milling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204401426U true CN204401426U (en) | 2015-06-17 |
Family
ID=53425302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420760635.7U Expired - Fee Related CN204401426U (en) | 2014-12-04 | 2014-12-04 | The hydraulic drive type tail-gate of asphalt road plane milling machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204401426U (en) |
-
2014
- 2014-12-04 CN CN201420760635.7U patent/CN204401426U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150617 Termination date: 20151204 |
|
| EXPY | Termination of patent right or utility model |