CN102900014B - Hydraulic system for controlling tail gate of pavement milling machine - Google Patents
Hydraulic system for controlling tail gate of pavement milling machine Download PDFInfo
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- CN102900014B CN102900014B CN201210371725.2A CN201210371725A CN102900014B CN 102900014 B CN102900014 B CN 102900014B CN 201210371725 A CN201210371725 A CN 201210371725A CN 102900014 B CN102900014 B CN 102900014B
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Abstract
The invention provides a hydraulic system for controlling a tail gate of a pavement milling machine. The hydraulic system comprises an overflow valve, an electromagnetic overflow valve, a first two-position four-way electromagnetic reversing valve, a second two-position four-way electromagnetic reversing valve, a first normally-closed two-position two-way electromagnetic reversing ball valve, a second normally-closed two-position two-way electromagnetic reversing ball valve, a three-position four-way electromagnetic reversing valve, a conveying motor of a belt conveyor, a fixed pressure reducing valve and a tail gate lifting oil cylinder. The hydraulic system has the advantages that the technical scheme is adopted, so that the operating quality of the milling machine is improved, the energy consumption is reduced, the performance is reliable, the structure is simple, the cost is cheap, lifting, locking, floating and back pressure functions of the tail gate can be achieved, the whole weight of the tail gate and a conveying device is grounded, pressure oil is fed into a rod cavity of the tail gate lifting oil cylinder to reduce the ground pressing of the tail gate, the ground pressing can be adjusted according to pavement conditions, the construction quality is guaranteed, the energy consumption is effectively reduced, and the operation is convenient.
Description
Technical field
The invention belongs to technical field of engineering machinery, especially relate to a kind of hydraulic system controlling end gate of pavement milling and planning machine.
Background technique
In existing technology, pavement milling machine is a kind of asphalt pavement conserving construction plant, the excavation being mainly used in the asphalt concrete pavements such as highway, airport, harbour, parking lot is overhauled, removing, the plucking of cement pavement and the milling equality operation of surface layer faulting of slab ends of the pavement diseases such as asphalt pavement rut, be full of cracks, carbuncle bag, pavement markers.In milling machine operation process, tail-gate compresses road groove and prevents the gap of milling material bottom tail-gate and between the groove of road from extruding, and guarantees that milling material is indoor at milling machine material, then utilizes belt conveyor to be transported on truck and transport.Tail-gate is to groove milling ground impacting force hour, although milling machine advance resistance diminishes, rewinding is unclean, bottom land out-of-flatness, and cleaning works increases; When the impacting force of tail-gate to groove milling bottom surface is large, milling material reclaims clean, and bottom land is smooth, but brings additional friction to the advance of milling machine, and consume engine power in a large number, tire is skidded in advance process, tire wear aggravates, and even causes tail-gate to be out of shape.Therefore, technological improvement is carried out to existing pavement milling machine and have extremely important meaning.
Summary of the invention
The problem to be solved in the present invention is to provide a kind of hydraulic system controlling end gate of pavement milling and planning machine, is especially applicable to the lifting of control end gate of pavement milling and planning machine, locking, floating, back pressure.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of hydraulic system controlling end gate of pavement milling and planning machine, comprise relief valve, electromagnetic relief valve, the first two-position four-way solenoid directional control valve, the second two-position four-way solenoid directional control valve, the first normally closed bi-bit bi-pass electromagnetic ball valve, the second normally closed bi-bit bi-pass electromagnetic ball valve, three-position four-way electromagnetic directional valve, the conveying motor of belt conveyor, Fixed pressure reducing valve and tail-gate hoist cylinder
First high-pressure oil outlet of the hydraulic system of described control end gate of pavement milling and planning machine divides four tunnels, wherein a road connects with described relief valve filler opening, two-way connects with described first two-position four-way solenoid directional control valve filler opening and described first two-position four-way solenoid directional control valve oil outlet respectively, and a road connects with described three-position four-way electromagnetic directional valve filler opening;
Second high-pressure oil outlet of the hydraulic system of described control end gate of pavement milling and planning machine divides three tunnels, and a road connects with described electromagnetic relief valve filler opening, and a road connects with described Fixed pressure reducing valve filler opening, and last road connects with the conveying motor of described belt conveyor;
Described Fixed pressure reducing valve oil outlet connects with described second two-position four-way solenoid directional control valve filler opening, and described second two-position four-way solenoid directional control valve oil outlet connects with described second normally closed bi-bit bi-pass electromagnetic ball valve filler opening;
Described three-position four-way electromagnetic directional valve first oil outlet connects with the rodless cavity of described tail-gate hoist cylinder, described three-position four-way electromagnetic directional valve second oil outlet connects with described first normally closed bi-bit bi-pass electromagnetic ball valve filler opening, and described three-position four-way electromagnetic directional valve return opening connects with fuel tank;
Described first normally closed bi-bit bi-pass electromagnetic ball valve oil outlet connects after connecting with described second normally closed bi-bit bi-pass electromagnetic ball valve oil outlet and connects with the rod chamber of described tail-gate hoist cylinder;
Described relief valve return opening, electromagnetic relief valve oil outlet, described Fixed pressure reducing valve drain tap, the second two-position four-way solenoid directional control valve return opening, described first two-position four-way solenoid directional control valve return opening and described first two-position four-way solenoid directional control valve oil outlet all connect with fuel tank.
Further, described three-position four-way electromagnetic directional valve Median Function is Y type.
Further, described Fixed pressure reducing valve oil outlet connects the second normally closed bi-bit bi-pass electromagnetic ball valve filler opening after the second two-position four-way solenoid directional control valve, described Fixed pressure reducing valve pressure adjustable, thus realizes tail-gate and touch road surface all the time and the adjustable object of ground pressure.
The advantage that the present invention has and good effect are: owing to adopting technique scheme, and make milling machine both can realize Non-follow control lifting and locking, the object that when can realize again operation, tail-gate ground pressure is adjustable, improves milling machine operation quality, reduce energy consumption; Reliable performance, structure is simple, with low cost, the lifting of tail-gate, locking, floating, back pressure function can be realized, both can realize tail-gate and the whole weight ground connection of feedway, also realize alleviating the object of tail-gate ground pressure by leading to pressure oil to tail-gate hoist cylinder rod chamber, and ground pressure can regulate according to surface conditions, ensure that construction quality and effectively reduce energy consumption, more convenient to operate; Have structure simple, easy to maintenance, processing cost is low, manufacturing efficiency advantages of higher.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
In figure:
1, relief valve 2, first two-position four-way electromagnetism changes 3, three-position four-way electromagnetic directional valve is to valve
4, the first normally closed bi-bit bi-pass 5, the normally closed bi-bit bi-pass electricity electromagnetic ball valve magnetic reversing globe valve of tail-gate hoist cylinder 6, second
7, the second two-position four-way electromagnetism 8, Fixed pressure reducing valve 9, electromagnetic relief valve selector valve
10, the conveying motor of belt conveyor
Embodiment
As shown in Figure 1, a kind of hydraulic system controlling end gate of pavement milling and planning machine of the present invention, comprise relief valve 1, the normally closed bi-bit bi-pass electromagnetic ball valve 6 of electromagnetic relief valve 9, first two-position four-way solenoid directional control valve 2, second two-position four-way solenoid directional control valve the 7, first normally closed bi-bit bi-pass electromagnetic ball valve 4, second, three-position four-way electromagnetic directional valve 3, the conveying motor of belt conveyor, Fixed pressure reducing valve 8 and tail-gate hoist cylinder 5
The high-pressure oil outlet P1 of the hydraulic system of described control end gate of pavement milling and planning machine divides four tunnels, wherein a road connects with described relief valve 1 oil inlet P, two-way connects with described first two-position four-way solenoid directional control valve 2 oil inlet P and described first two-position four-way solenoid directional control valve 2 oil outlet A respectively, and a road connects with described three-position four-way electromagnetic directional valve 3 oil inlet P;
The high-pressure oil outlet P2 of the hydraulic system of described control end gate of pavement milling and planning machine divides three tunnels, one tunnel connects with described electromagnetic relief valve 9 oil inlet P, one tunnel connects with described Fixed pressure reducing valve 8 oil inlet P, and last road connects with the conveying motor 10 of described belt conveyor;
Described Fixed pressure reducing valve 8 oil outlet P ' connects with described second two-position four-way solenoid directional control valve 7 oil inlet P, and described second two-position four-way solenoid directional control valve 7 oil outlet B connects with described second normally closed bi-bit bi-pass electromagnetic ball valve 6 filler opening A;
Described three-position four-way electromagnetic directional valve 3 oil outlet A connects with the rodless cavity of tail-gate hoist cylinder 5, and its oil outlet B connects with the first normally closed bi-bit bi-pass electromagnetic ball valve 4 filler opening A, and its oil return inlet T and fuel tank T-phase connect;
Described first normally closed bi-bit bi-pass electromagnetic ball valve 4 oil outlet B connects after connecting with described second normally closed bi-bit bi-pass electromagnetic ball valve 6 oil outlet B and connects with the rod chamber of described tail-gate hoist cylinder 5;
Described relief valve 1 oil return inlet T, electromagnetic relief valve 9 oil outlet T, described Fixed pressure reducing valve 8 drain tap T, the second two-position four-way solenoid directional control valve 7 oil return inlet T, described first two-position four-way solenoid directional control valve 2 oil return inlet T and described first two-position four-way solenoid directional control valve 2 oil outlet B all connect with fuel tank T-phase.Described three-position four-way electromagnetic directional valve 3 Median Function is Y type.Described Fixed pressure reducing valve 8 oil outlet P ' meets the second normally closed bi-bit bi-pass electromagnetic ball valve 6 filler opening A after the second two-position four-way solenoid directional control valve 7, this Fixed pressure reducing valve 8 pressure adjustable, thus realizes tail-gate and touch road surface all the time and the adjustable object of ground pressure.
The working procedure of this example: when milling machine milling and planing drum does not work, tail-gate is in lockup state, and belt conveyor does not also work, now electromagnet Y1 power-off, electromagnetic relief valve 9 makes pressure oil P2 off-load as unloading valve, reduces system energy consumption; When milling machine milling and planing drum works, belt conveyor works simultaneously, and its back pressure function just can be opened, and the conveying motor 10 of the belt conveyor that in Fig. 1, pressure oil P2 connects provides pressure oil, now electromagnet Y1 obtains electric, and electromagnetic relief valve 9 prevents system overload as safety valve.The following stated is milling and planing drum and belt conveyor is all in running order, and namely electromagnet Y1 obtains electricity condition.
When tail-gate is in lockup state: electromagnet Y2 power-off, pressure oil P1, by two-position four-way solenoid directional control valve 2 directly oil sump tank T, realizes off-load, reduces system energy consumption; Electromagnet Y3, Y4, Y5, Y6, Y7 power-off, realizes tail-gate hoist cylinder 5 locking;
When tail-gate carries out enhancing action: electromagnet Y2 obtains electric, relief valve 1 prevents system overload as safety valve, electromagnet Y3 obtains electric, Y4, Y6 power-off, realize tail-gate hoist cylinder piston rod to move upward to drive tail-gate to promote, the equal power-off of electromagnet Y5, Y7, make pressure oil P2 can not be entered tail-gate hoist cylinder rod chamber by shutoff, namely pressure oil P2 can not form interference to tail-gate enhancing action.
When tail-gate carries out down maneuver: electromagnet Y2 obtains electric, relief valve 1 prevents system overload as safety valve, electromagnet Y4, Y6 obtain electric, Y3 power-off, realize tail-gate cylinder piston rod to move downward to drive tail-gate to decline, the equal power-off of electromagnet Y5, Y7, pressure oil P2 can not form interference to tail-gate down maneuver.
When tail-gate is in quick condition: electromagnet Y2 power-off, relief valve 1 makes pressure oil P1 off-load as unloading valve, reduce system energy consumption, electromagnet Y3, Y4 power-off, Y6 obtains electric, the rodless cavity of tail-gate hoist cylinder 5 and rod chamber all connect fuel tank T, tail-gate hoist cylinder is in quick condition, the equal power-off of electromagnet Y5, Y7, pressure oil P2 can not form interference to tail-gate quick condition, now tail-gate is adjacent to road surface by self and the deadweight of device that is arranged on tail-gate, and the pressure be pressed on road surface is tail-gate self and the whole deadweights being arranged on the device on tail-gate.
When tail-gate is in backpressure condition: electromagnet Y2 power-off, relief valve 1 makes pressure oil P1 off-load as unloading valve, reduce system energy consumption, electromagnet Y3, Y4, Y6 power-off, tail-gate hoist cylinder 5 rod chamber fluid is by the first normally closed bi-bit bi-pass electromagnetic ball valve 4 shutoff, three-position four-way electromagnetic directional valve 3 oil sump tank T can not be passed through, electromagnet Y5, Y7 obtain electric, pressure oil P2 enters the rod chamber of tail-gate hoist cylinder 5 again after Fixed pressure reducing valve 8 reduces pressure through two-position four-way solenoid directional control valve 7 and the second normally closed bi-bit bi-pass electromagnetic ball valve 6, reduce tail-gate ground pressure.After lifting due to pavement behavior tail-gate, by tail-gate and the deadweight that is mounted thereon device, tail-gate hoist cylinder 5 rod chamber fluid is pushed back fuel tank T by the drain tap of Fixed pressure reducing valve 8, tail-gate hoist cylinder 5 piston rod is declined, and tail-gate continues to be adjacent to road surface.By regulating the setting pressure of Fixed pressure reducing valve 8, adjustable tail-gate ground pressure.
Above one embodiment of the present of invention have been described in detail, but described content being only preferred embodiment of the present invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the present patent application scope change and improve, and all should still belong within patent covering scope of the present invention.
Claims (3)
1. one kind controls the hydraulic system of end gate of pavement milling and planning machine, it is characterized in that: comprise relief valve, electromagnetic relief valve, the first two-position four-way solenoid directional control valve, the second two-position four-way solenoid directional control valve, the first normally closed bi-bit bi-pass electromagnetic ball valve, the second normally closed bi-bit bi-pass electromagnetic ball valve, three-position four-way electromagnetic directional valve, the conveying motor of belt conveyor, Fixed pressure reducing valve and tail-gate hoist cylinder
First high-pressure oil outlet of the hydraulic system of described control end gate of pavement milling and planning machine divides four tunnels, wherein a road connects with described relief valve filler opening, two-way connects with described first two-position four-way solenoid directional control valve filler opening and described first two-position four-way solenoid directional control valve oil outlet respectively, and a road connects with described three-position four-way electromagnetic directional valve filler opening;
Second high-pressure oil outlet of the hydraulic system of described control end gate of pavement milling and planning machine divides three tunnels, and a road connects with described electromagnetic relief valve filler opening, and a road connects with described Fixed pressure reducing valve filler opening, and last road connects with the conveying motor of described belt conveyor;
Described Fixed pressure reducing valve oil outlet connects with described second two-position four-way solenoid directional control valve filler opening, and described second two-position four-way solenoid directional control valve oil outlet connects with described second normally closed bi-bit bi-pass electromagnetic ball valve filler opening;
Described three-position four-way electromagnetic directional valve first oil outlet connects with the rodless cavity of described tail-gate hoist cylinder, described three-position four-way electromagnetic directional valve second oil outlet connects with described first normally closed bi-bit bi-pass electromagnetic ball valve filler opening, and described three-position four-way electromagnetic directional valve return opening connects with fuel tank;
Described first normally closed bi-bit bi-pass electromagnetic ball valve oil outlet connects after connecting with described second normally closed bi-bit bi-pass electromagnetic ball valve oil outlet and connects with the rod chamber of described tail-gate hoist cylinder;
Described relief valve return opening, electromagnetic relief valve oil outlet, described Fixed pressure reducing valve drain tap, the second two-position four-way solenoid directional control valve return opening, described first two-position four-way solenoid directional control valve return opening and described first two-position four-way solenoid directional control valve oil outlet all connect with fuel tank.
2. a kind of hydraulic system controlling end gate of pavement milling and planning machine according to claim 1, is characterized in that: described three-position four-way electromagnetic directional valve Median Function is Y type.
3. a kind of hydraulic system controlling end gate of pavement milling and planning machine according to claim 1, it is characterized in that: described Fixed pressure reducing valve oil outlet connects the second normally closed bi-bit bi-pass electromagnetic ball valve filler opening after the second two-position four-way solenoid directional control valve, described Fixed pressure reducing valve pressure adjustable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210371725.2A CN102900014B (en) | 2012-09-28 | 2012-09-28 | Hydraulic system for controlling tail gate of pavement milling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210371725.2A CN102900014B (en) | 2012-09-28 | 2012-09-28 | Hydraulic system for controlling tail gate of pavement milling machine |
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| Publication Number | Publication Date |
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| CN102900014A CN102900014A (en) | 2013-01-30 |
| CN102900014B true CN102900014B (en) | 2015-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210371725.2A Expired - Fee Related CN102900014B (en) | 2012-09-28 | 2012-09-28 | Hydraulic system for controlling tail gate of pavement milling machine |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899587B (en) * | 2014-04-23 | 2017-02-15 | 湖南联智桥隧技术有限公司 | Synchronous jacking hydraulic control system |
| CN104074816B (en) * | 2014-06-23 | 2016-05-25 | 湖南三一路面机械有限公司 | A kind of milling machine Control system of gate and milling machine |
| CN104500485B (en) * | 2014-12-25 | 2017-06-06 | 柳工无锡路面机械有限公司 | A kind of road-surface milling machine scraper floating hydraulic system |
| CN109083877A (en) * | 2018-10-17 | 2018-12-25 | 北京天顺长城液压科技有限公司 | Hydraulic control circuit for milling machine tail-gate |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19630712A1 (en) * | 1996-07-30 | 1998-02-05 | Rexroth Mannesmann Gmbh | Feed hydraulics |
| JP2002130207A (en) * | 2000-10-31 | 2002-05-09 | Hitachi Ltd | Hydraulic drafting device for rolling machine |
| CN2594299Y (en) * | 2002-09-29 | 2003-12-24 | 兖州恒升机械有限公司 | Road milling and planing apparatus |
| JP2004011833A (en) * | 2002-06-10 | 2004-01-15 | Nisshin Steel Co Ltd | Hydraulic device having double structure flexible pipe passage |
| CN201125889Y (en) * | 2007-12-04 | 2008-10-01 | 镇江华晨华通路面机械有限公司 | Road surface milling planer tail gate floating hydraulic system |
| CN202881835U (en) * | 2012-09-28 | 2013-04-17 | 天津山河装备开发有限公司 | Hydraulic system for controlling tail door of road surface milling planer |
-
2012
- 2012-09-28 CN CN201210371725.2A patent/CN102900014B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19630712A1 (en) * | 1996-07-30 | 1998-02-05 | Rexroth Mannesmann Gmbh | Feed hydraulics |
| JP2002130207A (en) * | 2000-10-31 | 2002-05-09 | Hitachi Ltd | Hydraulic drafting device for rolling machine |
| JP2004011833A (en) * | 2002-06-10 | 2004-01-15 | Nisshin Steel Co Ltd | Hydraulic device having double structure flexible pipe passage |
| CN2594299Y (en) * | 2002-09-29 | 2003-12-24 | 兖州恒升机械有限公司 | Road milling and planing apparatus |
| CN201125889Y (en) * | 2007-12-04 | 2008-10-01 | 镇江华晨华通路面机械有限公司 | Road surface milling planer tail gate floating hydraulic system |
| CN202881835U (en) * | 2012-09-28 | 2013-04-17 | 天津山河装备开发有限公司 | Hydraulic system for controlling tail door of road surface milling planer |
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| CN102900014A (en) | 2013-01-30 |
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