CN103726435B - A kind of milling device hydraulic control system - Google Patents
A kind of milling device hydraulic control system Download PDFInfo
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- CN103726435B CN103726435B CN201310466415.3A CN201310466415A CN103726435B CN 103726435 B CN103726435 B CN 103726435B CN 201310466415 A CN201310466415 A CN 201310466415A CN 103726435 B CN103726435 B CN 103726435B
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Abstract
The invention discloses a kind of milling device hydraulic control system, comprise valve block one (1), sidesway oil cylinder (2), hydraulic lock (3), dump ram (4), Vertical Cylinders (5), one way valve (6), valve block two (7), hydraulic motor (8) and pipe joint, working solution force feed enters whole system through the P mouth of valve block two, pressure-gradient control valve in valve block two ensures that the hydraulic oil of certain flow is through the preferential supply valve block one of VP mouth, and unnecessary hydraulic oil enters hydraulic motor through MS mouth; Electromagnetic valve DC4 is energized, and handles electromagnetic valve DC1, DC2, DC3 and controls the flexible of sidesway oil cylinder, dump ram and Vertical Cylinders; Electromagnetic valve DC4 power-off, the hydraulic oil entering valve block one through the VP mouth PB mouth that stimulates the menstrual flow gets back to valve block two, enters hydraulic motor, drive hydraulic motor to drive milling hub to carry out milling work through MS mouth.This system can be corrected the milling device position that milling hub produces in the course of the work and be moved and angular deflection, ensures the evenness of road surface of milling.
Description
Technical field
The present invention relates to a kind of milling device, specifically a kind of small engineering machinery milling device hydraulic control system, belongs to milling device technical field.
Background technology
Along with Road Transportation amount increases year by year, the contradiction of road design and car load strengthens, and the maintenance technology of road pavement requires also more and more higher, and particularly the maintenance workload of Local Road Surface also strengthens thereupon, repair more and more on a small scale, the quality of maintenance is also progressively promoted.
At present, in the comprehensive maintenance construction of flexible pavement, when needing to repair damaged road surface, the general milling device that adopts replaces traditional Hydraulic pick and special milling machine, and Hydraulic pick efficiency of construction is low, the uniformity of cutting depth is wayward; Special milling machine, efficiency of construction is high, and the uniformity of cutting depth easily controls, but for only needing the place of light maintenance, according to special milling machine, then construction cost is high, and allocation and transportation equipment is inconvenient; With regard to milling where, milling body as small engineering machinery amasss little, and manoeuvrable is generally arranged on sliding loader, can do and where need to repair, and not destroy normal road surface.
But fierce collision occurs for milling device milling hub and road surface in the milling course of work, milling hub can produce position skew and angular deflection with very slow speed, and the road surface of milling therefore can be caused deep mixed.
Summary of the invention
For the problems referred to above, the invention provides a kind of milling device hydraulic control system, can prevent milling device in the course of the work milling hub with very slow speed produce position move and angular deflection, ensure the evenness of road surface of milling.
For achieving the above object, this milling device hydraulic control system comprises valve block one, sidesway oil cylinder, dump ram, Vertical Cylinders, valve block two, hydraulic motor and pipe joint;
Milling device working solution force feed enters the valve block two of whole hydraulic system through the P mouth of valve block two, pressure-gradient control valve in valve block two ensures the VP mouth preferential supply valve block one of hydraulic oil by valve block two of certain flow, and unnecessary hydraulic oil enters hydraulic motor by the MS mouth of valve block two;
When needing to regulate milling hub milling position and angle, electromagnetic valve DC4 is energized, the flexible of sidesway oil cylinder, dump ram and Vertical Cylinders is controlled by handling electromagnetic valve DC1, DC2, DC3, milling hub is adjusted to suitable position, then by electromagnetic valve DC4 power-off, the hydraulic oil entering valve block one from the VP mouth of valve block one gets back to valve block two by the PB mouth of valve block one, MS mouth by valve block two together with other hydraulic oil enters hydraulic motor 8, drives hydraulic motor 8 to drive milling hub to carry out milling work.
As further improvement project, the electromagnetic valve Median Function that the valve block one of this system uses is Y type, and installs hydraulic lock respectively between valve block one and each oil cylinder, installs one way valve at the VR mouth of valve block two.
As advantageous modification of the present invention, electrical control is carried out by PLC, each position sensor is electrically connected with PLC, electromagnetic valve DC4, DC1, DC2, DC3 and PLC electrical connection, by the feedback of each position sensor, opening or closing of PLC Controlling solenoid valve DC4, DC1, DC2, DC3 realizes automation.
Compared with prior art, the present invention is owing to being provided with sidesway oil cylinder, dump ram and Vertical Cylinders, by the control of hydraulic system, the milling device position that milling hub produces because there is fierce collision with road surface in the course of the work can being corrected move and angular deflection, ensureing the evenness of road surface of milling; Owing to having installed hydraulic lock respectively between valve block one and each oil cylinder, at the VR mouth of valve block two, one way valve is installed, thus ensure that the hydraulic oil of valve block two can not affect the hydraulic oil flowed out from the VR mouth of valve block one, hydraulic lock can by locked for each oil cylinder, thus realize in milling process milling hub position and angle constant, ensure the evenness of road surface that milling goes out further; Owing to adopting PLC to control, thus achieve automatic control, simple to operate.
Accompanying drawing explanation
Fig. 1 is hydraulic schematic diagram of the present invention.
In figure: 1, valve block one, 2, sidesway oil cylinder, 3, hydraulic lock, 4, dump ram, 5, Vertical Cylinders, 6, one way valve, 7, valve block two, 8, hydraulic motor.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described.
As shown in Figure 1, this milling device hydraulic control system comprises valve block 1, sidesway oil cylinder 2, dump ram 4, Vertical Cylinders 5, valve block 27, hydraulic motor 8 and pipe joint.
Milling device working solution force feed enters the valve block 27 of whole hydraulic system through the P mouth of valve block 27, pressure-gradient control valve in valve block 27 ensures the VP mouth preferential supply valve block one 1 of hydraulic oil by valve block 27 of certain flow, and unnecessary hydraulic oil enters hydraulic motor 8 by the MS mouth of valve block 27.
When needing to regulate milling hub milling position and angle, electromagnetic valve DC4 is energized, the flexible of sidesway oil cylinder 2, dump ram 4 and Vertical Cylinders 5 is controlled by handling electromagnetic valve DC1, DC2, DC3, milling hub is adjusted to suitable position, then by electromagnetic valve DC4 power-off, the hydraulic oil entering valve block 1 from the VP mouth of valve block 1 gets back to valve block 27 by the PB mouth of valve block 1, MS mouth by valve block 27 together with other hydraulic oil enters hydraulic motor 8, drives hydraulic motor 8 to drive milling hub to carry out milling work.
Due to all electromagnetic valves all can have certain in discharge, inside let out and oil cylinder can be caused to creep, therefore, problem is let out for solving Inner, as further improvement project, the electromagnetic valve Median Function that the valve block one of this system uses is Y type, and between valve block 1 and each oil cylinder, hydraulic lock 3 has been installed respectively, at the VR mouth of valve block 27, one way valve 6 is installed, in the milling course of work, pressure in valve block 1 can be very high, have a small amount of hydraulic oil at very high pressures by electromagnetic valve DC1, DC2, DC3 is from B1, C1, B2, C2, B3, C3 flows out, the hydraulic oil flowed out is that the electromagnetic valve of Y type flows out from the VR mouth of valve block 1 by Median Function, one way valve 6 can ensure that the hydraulic oil of valve block 27 can not affect the hydraulic oil flowed out from the VR mouth of valve block 1, hydraulic lock 3 can by locked for each oil cylinder, thus realize in milling process milling hub position and angle constant, the evenness of road surface that milling goes out.
This hydraulic system can by automatically controlled button the opening or closing of direct Controlling solenoid valve when needing to adjust milling hub milling position and angle, or adopt opening or closing of PLC Controlling solenoid valve, because the latter can realize intelligentized operation, the difference of the adjustment can cancelling that the difference because of operator's experience the causes Adjustment effect that difference causes opportunity, therefore as advantageous modification of the present invention, electrical control is carried out by PLC, each position sensor is electrically connected with PLC, electromagnetic valve DC4, DC1, DC2, DC3 and PLC is electrically connected, by the feedback of each position sensor, PLC Controlling solenoid valve DC4, DC1, DC2, DC3 opens or closes, and then realize automation.
To be arranged on sliding loader by this milling device hydraulic control system, be connected with main pump by the P mouth of fluid pressure line by valve block 27, be connected with hydraulic oil container by the oil return opening of hydraulic motor 8, PLC control cabinet is connected with power circuit, in the milling course of work, this system has two tasks, one is adjustment milling hub milling position and angle, two is that driving milling hub carries out milling, when sensor detects change in displacement or angle change, feed back signal to PLC, when changing value reaches setting value, PLC sends instruction, electromagnetic valve DC4 energising is opened, PLC again foundation is that change in displacement or angle change and then open corresponding electromagnetic valve DC1, DC2, DC3 controls sidesway oil cylinder 2, dump ram 4 and Vertical Cylinders 5 flexible, by the synchronous feedback of each sensor, milling hub is adjusted to suitable position, then shut electromagnetic valve DC4, DC1, DC2, DC3, hydraulic motor 8 drives milling hub to proceed milling work, complete automatic adjustment.
This milling device hydraulic control system also can be arranged in other engineering machinery with hydraulic system and complete road-surface milling.
This milling device hydraulic control system is owing to being provided with sidesway oil cylinder, dump ram and Vertical Cylinders, by the control of hydraulic system, the milling device position that milling hub produces because there is fierce collision with road surface in the course of the work can being corrected move and angular deflection, ensureing the evenness of road surface of milling; Owing to having installed hydraulic lock respectively between valve block one and each oil cylinder, at the VR mouth of valve block two, one way valve is installed, thus ensure that the hydraulic oil of valve block two can not affect the hydraulic oil flowed out from the VR mouth of valve block one, hydraulic lock can by locked for each oil cylinder, thus realize in milling process milling hub position and angle constant, ensure the evenness of road surface that milling goes out further; Owing to adopting PLC to control, thus achieve automatic control, simple to operate.
Claims (3)
1. a milling device hydraulic control system, is characterized in that, comprises valve block one (1), sidesway oil cylinder (2), dump ram (4), Vertical Cylinders (5), valve block two (7), hydraulic motor (8) and pipe joint, working solution force feed enters whole hydraulic system through the P mouth of valve block two (7), pressure-gradient control valve in valve block two (7) ensures the VP mouth preferential supply valve block one (1) of hydraulic oil by valve block two (7) of certain flow, and unnecessary hydraulic oil enters hydraulic motor (8) by the MS mouth of valve block two (7), when needing to regulate milling hub milling position and angle, electromagnetic valve DC4 is energized, by handling electromagnetic valve DC1, DC2, DC3 controls sidesway oil cylinder (2), dump ram (4) and Vertical Cylinders (5) flexible, milling hub is adjusted to suitable position, then by electromagnetic valve DC4 power-off, the hydraulic oil entering valve block one (1) from the VP mouth of valve block two (7) gets back to valve block two (7) by the PB mouth of valve block one (1), hydraulic motor (8) is entered by the MS mouth of valve block two (7) together with other hydraulic oil, hydraulic motor (8) is driven to drive milling hub to carry out milling work.
2. milling device hydraulic control system according to claim 1, it is characterized in that, the electromagnetic valve Median Function used in described valve block one (1) is Y type, and installs hydraulic lock (3) respectively between valve block one (1) and each oil cylinder, installs one way valve (6) at the VR mouth of valve block two (7).
3. milling device hydraulic control system according to claim 1, it is characterized in that, electrical control is carried out by PLC, each position sensor is electrically connected with PLC, electromagnetic valve DC4, DC1, DC2, DC3 and PLC electrical connection, by the feedback of each position sensor, PLC Controlling solenoid valve DC4, DC1, DC2, DC3 open or close.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310466415.3A CN103726435B (en) | 2013-10-09 | 2013-10-09 | A kind of milling device hydraulic control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310466415.3A CN103726435B (en) | 2013-10-09 | 2013-10-09 | A kind of milling device hydraulic control system |
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| CN103726435A CN103726435A (en) | 2014-04-16 |
| CN103726435B true CN103726435B (en) | 2016-04-27 |
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| CN201310466415.3A Active CN103726435B (en) | 2013-10-09 | 2013-10-09 | A kind of milling device hydraulic control system |
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| CN115870839B (en) * | 2023-03-08 | 2023-05-12 | 南京仁厚科技有限公司 | Fiberboard edging processing apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202073018U (en) * | 2011-05-07 | 2011-12-14 | 徐州徐工筑路机械有限公司 | Hydraulic control system for flotation of rear-material-conveying milling machine scraper plate |
| CN202672015U (en) * | 2012-06-05 | 2013-01-16 | 沈阳北方交通重工集团有限公司 | Novel hydraulic circuit for supplying oil to fluctuation of milling machine rear scraper cylinder |
| CN203063930U (en) * | 2013-01-31 | 2013-07-17 | 徐州徐工筑路机械有限公司 | Hydraulic service brake system for milling machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100661394B1 (en) * | 2004-07-31 | 2006-12-27 | 주식회사 봉신 | Overload Preventing System for Mixing Mill |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202073018U (en) * | 2011-05-07 | 2011-12-14 | 徐州徐工筑路机械有限公司 | Hydraulic control system for flotation of rear-material-conveying milling machine scraper plate |
| CN202672015U (en) * | 2012-06-05 | 2013-01-16 | 沈阳北方交通重工集团有限公司 | Novel hydraulic circuit for supplying oil to fluctuation of milling machine rear scraper cylinder |
| CN203063930U (en) * | 2013-01-31 | 2013-07-17 | 徐州徐工筑路机械有限公司 | Hydraulic service brake system for milling machine |
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| CN103726435A (en) | 2014-04-16 |
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Effective date of registration: 20230822 Address after: 221004 No.99, Kunpeng North Road, Xuzhou Economic and Technological Development Zone, Xuzhou City, Jiangsu Province Patentee after: XCMG CONSTRUCTION MACHINERY Co.,Ltd. SCIENCE AND TECHNOLOGY BRANCH Address before: No. 99, Guangde Road, Economic Development Zone, Xuzhou City, Jiangsu Province, 221004 Patentee before: XUZHOU XUGONG SPECIAL CONSTRUCTION MACHINERY Co.,Ltd. |
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