CN102900014A - 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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- CN102900014A CN102900014A CN2012103717252A CN201210371725A CN102900014A CN 102900014 A CN102900014 A CN 102900014A CN 2012103717252 A CN2012103717252 A CN 2012103717252A CN 201210371725 A CN201210371725 A CN 201210371725A CN 102900014 A CN102900014 A CN 102900014A
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- way solenoid
- solenoid operated
- operated directional
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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 of controlling end gate of pavement milling and planning machine.
Background technology
In existing technology, pavement milling machine is a kind of asphalt pavement conserving construction machinery, the excavation that is mainly used in the asphalt concrete pavements such as highway, airport, harbour, parking lot is overhauled, the removing of the pavement diseases such as asphalt pavement rut, be full of cracks, carbuncle bag, pavement markers, the plucking of cement pavement and surface layer faulting of slab ends mill the equality operation.In the milling machine operation process, tail-gate compresses the road groove and prevents that the milling material from extruding from the gap between tail-gate bottom and the road groove, guarantees that the milling material is indoor at the milling machine material, then utilizes belt conveyor to be transported on the truck and transports.Tail-gate is to groove milling ground thrust hour, although the milling machine advance resistance diminishes, rewinding is unclean, the bottom land out-of-flatness, and cleaning works increases; When tail-gate was large to the thrust of groove milling bottom surface, the milling material reclaimed clean, and bottom land is smooth, but brought additional friction for advancing of milling machine, had consumed in a large number engine power, and tire is skidded in the process of advancing, the tire wear aggravation, even cause the tail-gate distortion.Therefore, existing pavement milling machine is carried out technological improvement extremely important meaning is arranged.
Summary of the invention
The problem to be solved in the present invention provides a kind of hydraulic system of controlling end gate of pavement milling and planning machine, especially is fit to lifting, locking, unsteady, the back pressure of control end gate of pavement milling and planning machine.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of hydraulic system of controlling end gate of pavement milling and planning machine, the conveying motor, fixed pressure reducing valve and the tail-gate hoist cylinder that comprise overflow valve, electromagnetic relief valve, the first two-position four-way solenoid operated directional valve, the second two-position four-way solenoid operated directional valve, the first normally closed bi-bit bi-pass electromagnetic ball valve, the second normally closed bi-bit bi-pass electromagnetic ball valve, 3-position 4-way solenoid operated directional valve, belt conveyor
The first high pressure oil-out of described road-surface milling machine hydraulic system divides four the tunnel, wherein one the tunnel joins with described overflow valve oil-in, two-way joins with described the first two-position four-way solenoid operated directional valve oil-in and oil-out respectively, and one the tunnel joins with described 3-position 4-way solenoid operated directional valve oil-in;
The second high pressure oil-out of described road-surface milling machine hydraulic system divides three the tunnel, the one tunnel to join with described electromagnetic relief valve oil-in, and one the tunnel joins with described fixed pressure reducing valve oil-in, and the conveying motor of last road and described belt conveyor joins;
Described fixed pressure reducing valve oil-out and described the second two-position four-way solenoid operated directional valve oil-in join, and described the second two-position four-way solenoid operated directional valve oil-out and the described second normally closed bi-bit bi-pass electromagnetic ball valve oil-in join;
The rodless cavity of described 3-position 4-way solenoid operated directional valve the first oil-out and described tail-gate hoist cylinder joins, described 3-position 4-way solenoid operated directional valve the second oil-out and the described first normally closed bi-bit bi-pass electromagnetic ball valve oil-in join, and described 3-position 4-way solenoid operated directional valve oil return opening and fuel tank join;
The rod chamber that connects after the described first normally closed bi-bit bi-pass electromagnetic ball valve oil-out and the described second normally closed bi-bit bi-pass electromagnetic ball valve oil-out join with described tail-gate hoist cylinder joins;
Described overflow valve oil return opening, electromagnetic relief valve oil-out, described fixed pressure reducing valve drain tap, the second two-position four-way solenoid operated directional valve oil return opening, described the first two-position four-way solenoid operated directional valve oil return opening and oil-out all join with fuel tank.
Further, described 3-position 4-way solenoid operated directional valve Median Function is the Y type.
Further, described fixed pressure reducing valve oil-out connects the second normally closed bi-bit bi-pass electromagnetic ball valve oil-in behind the second two-position four-way solenoid operated directional valve, and described fixed pressure reducing valve pressure is adjustable, thereby realizes that tail-gate touch road surface and the adjustable purpose of ground pressure all the time.
Advantage and good effect that the present invention has are: owing to adopt technique scheme, make milling machine both can realize manually controlling lifting and locking, the adjustable purpose of tail-gate ground pressure has improved the milling machine operation quality in the time of realizing operation again, has reduced energy consumption; Dependable performance, simple in structure, with low cost, can realize lifting, locking, unsteady, the back pressure function of tail-gate, both can realize the whole weight ground connection of tail-gate and conveying device, also can be by the logical pressure oil of tail-gate hoist cylinder rod chamber being realized alleviating the purpose of tail-gate ground pressure, and ground pressure can be regulated according to the road surface situation, guarantee construction quality and effectively reduced energy consumption, more convenient to operate; Have simple in structurely, easy to maintenance, processing cost is low, the production efficiency advantages of higher.
Description of drawings
Fig. 1 is structural representation of the present invention;
Among the figure:
1, overflow valve 2, two-position four-way solenoid operated directional valve 3,3-position 4-way solenoid operated directional valve
4, normally closed bi-bit bi-pass electromagnetism 5, tail-gate hoist cylinder 6, normally closed bi-bit bi-pass electromagnetism change
Reversing globe valve is to ball valve
7, two-position four-way electromagnetic switch 8, fixed pressure reducing valve 9, electromagnetic relief valve
Valve
10, belt conveyor is defeated
Send motor
The specific embodiment
As shown in Figure 1, a kind of hydraulic system of controlling end gate of pavement milling and planning machine of the present invention, the conveying motor, fixed pressure reducing valve 8 and the tail-gate hoist cylinder 5 that comprise overflow valve 1, electromagnetic relief valve 9, two-position four-way solenoid operated directional valve 2, two-position four-way solenoid operated directional valve 7, normally closed bi-bit bi-pass electromagnetic ball valve 4, normally closed bi-bit bi-pass electromagnetic ball valve 6,3-position 4-way solenoid operated directional valve 3, belt conveyor
The high pressure oil-out P1 of described road-surface milling machine hydraulic system divides four the tunnel, wherein one the tunnel joins with described overflow valve 1 oil inlet P, two-way joins with described two-position four-way solenoid operated directional valve 2 oil inlet P and oil-out A respectively, and one the tunnel joins with described 3-position 4-way solenoid operated directional valve 3 oil inlet P;
The high pressure oil-out P2 of described road-surface milling machine hydraulic system divides three the tunnel, the one tunnel to join with described electromagnetic relief valve 9 oil inlet P, and one the tunnel joins with described fixed pressure reducing valve 8 oil inlet P, and the conveying motor 10 of last road and described belt conveyor joins;
Described fixed pressure reducing valve 8 oil-out P ' join with described two-position four-way solenoid operated directional valve 7 oil inlet P, and described two-position four-way solenoid operated directional valve 7 oil-out B and described normally closed bi-bit bi-pass electromagnetic ball valve 6 oil-in A join;
The rodless cavity of described 3-position 4-way solenoid operated directional valve 3 oil-out A and tail-gate hoist cylinder 5 joins, and its oil-out B and normally closed bi-bit bi-pass electromagnetic ball valve 4 oil-in A join, and its oil return inlet T and fuel tank T join;
The rod chamber that connects after described normally closed bi-bit bi-pass electromagnetic ball valve 4 oil-out B and described normally closed bi-bit bi-pass electromagnetic ball valve 6 oil-out B join with described tail-gate hoist cylinder 5 joins;
Described overflow valve 1 oil return inlet T, electromagnetic relief valve 9 oil-out T, described fixed pressure reducing valve 8 drain tap T, two-position four-way solenoid operated directional valve 7 oil return inlet T, described two-position four-way solenoid operated directional valve 2 oil return inlet T and oil-out B all join with fuel tank T.Described 3-position 4-way solenoid operated directional valve 3 Median Functions are the Y type.Described fixed pressure reducing valve 8 oil-out P ' meet normally closed bi-bit bi-pass electromagnetic ball valve 6 oil-in A behind two-position four-way solenoid operated directional valve 7, these fixed pressure reducing valve 8 pressure are adjustable, thereby realize that tail-gate touch road surface and the adjustable purpose of ground pressure all the time.
The course of work of this example: when the milling machine milling and planing drum was not worked, tail-gate was in lockup state, and belt conveyor is not also worked, electromagnet Y1 outage this moment, and electromagnetic relief valve 9 makes pressure oil P2 off-load as unloader, reduces system energy consumption; When the milling machine milling and planing drum is worked, belt conveyor is worked simultaneously, and its back pressure function just can be opened, and the conveying motor 10 of the belt conveyor that pressure oil P2 connects among Fig. 1 provides pressure oil, this moment, electromagnet Y1 got electricly, 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 gets electricity condition.
When tail-gate is in lockup state: electromagnet Y2 outage, pressure oil P1 realizes off-load by two-position four-way solenoid operated directional valve 2 direct oil sump tank T, reduces system energy consumption; Electromagnet Y3, Y4, Y5, Y6, Y7 outage realize tail-gate hoist cylinder 5 lockings;
When tail-gate promoted action: electromagnet Y2 got electric, overflow valve 1 prevents system overload as safety valve, electric, Y4, Y6 outage that electromagnet Y3 gets, realize that tail-gate hoist cylinder piston rod moves upward to drive tail-gate and promotes, electromagnet Y5, Y7 all cut off the power supply, so that pressure oil P2 can not entered tail-gate hoist cylinder rod chamber by shutoff, namely pressure oil P2 can not promote the interference of action formation to tail-gate.
When tail-gate carried out down maneuver: electromagnet Y2 got electric, overflow valve 1 prevents system overload as safety valve, electromagnet Y4, Y6 get electric, the Y3 outage, realize that the tail-gate cylinder piston rod moves downward to drive tail-gate and descends, electromagnet Y5, Y7 all cut off the power supply, and pressure oil P2 can not consist of interference to the tail-gate down maneuver.
When tail-gate is in quick condition: electromagnet Y2 outage, overflow valve 1 as unloader so that pressure oil P1 off-load, reduce system energy consumption, electromagnet Y3, Y4 outage, Y6 gets electric, the rodless cavity of tail-gate hoist cylinder 5 and rod chamber are all connected fuel tank T, the tail-gate hoist cylinder is in quick condition, electromagnet Y5, Y7 all cut off the power supply, pressure oil P2 can not consist of interference to the tail-gate quick condition, this moment, tail-gate was adjacent to the road surface by self and the deadweight that is installed in the device on the tail-gate, and the pressure that is pressed on the road surface is tail-gate self and the whole deadweights that are installed in the device on the tail-gate.
When tail-gate is in the back pressure state: electromagnet Y2 outage, overflow valve 1 as unloader so that pressure oil P1 off-load, reduce system energy consumption, electromagnet Y3, Y4, Y6 outage, tail-gate hoist cylinder 5 rod chamber fluid are by normally closed bi-bit bi-pass electromagnetic ball valve 4 shutoff, can not pass through 3-position 4-way solenoid operated directional valve 3 oil sump tank T, electromagnet Y5, Y7 get electric, pressure oil P2 enters the rod chamber of tail-gate hoist cylinder 5 again through two-position four-way solenoid operated directional valve 7 and normally closed bi-bit bi-pass electromagnetic ball valve 6 after fixed pressure reducing valve 8 decompression, reduce the tail-gate ground pressure.When because after the pavement behavior tail-gate lifts, by tail-gate and the deadweight that is mounted thereon device the drain tap of tail-gate hoist cylinder 5 rod chamber fluid by fixed pressure reducing valve 8 pushed back fuel tank T, tail-gate hoist cylinder 5 piston rods are descended, tail-gate continues to be adjacent to the road surface.By regulating the setting pressure of fixed pressure reducing valve 8, can regulate the tail-gate ground pressure.
More than one embodiment of the present of invention are had been described in detail, but described content only is preferred embodiment of the present invention, can not be considered to be used to limiting practical range of the present invention.All equalizations of doing according to the present patent application scope change and improve etc., all should still belong within the patent covering scope of the present invention.
Claims (3)
1. hydraulic system of controlling end gate of pavement milling and planning machine, it is characterized in that: the conveying motor, fixed pressure reducing valve and the tail-gate hoist cylinder that comprise overflow valve, electromagnetic relief valve, the first two-position four-way solenoid operated directional valve, the second two-position four-way solenoid operated directional valve, the first normally closed bi-bit bi-pass electromagnetic ball valve, the second normally closed bi-bit bi-pass electromagnetic ball valve, 3-position 4-way solenoid operated directional valve, belt conveyor
The first high pressure oil-out of described road-surface milling machine hydraulic system divides four the tunnel, wherein one the tunnel joins with described overflow valve oil-in, two-way joins with described the first two-position four-way solenoid operated directional valve oil-in and oil-out respectively, and one the tunnel joins with described 3-position 4-way solenoid operated directional valve oil-in;
The second high pressure oil-out of described road-surface milling machine hydraulic system divides three the tunnel, the one tunnel to join with described electromagnetic relief valve oil-in, and one the tunnel joins with described fixed pressure reducing valve oil-in, and the conveying motor of last road and described belt conveyor joins;
Described fixed pressure reducing valve oil-out and described the second two-position four-way solenoid operated directional valve oil-in join, and described the second two-position four-way solenoid operated directional valve oil-out and the described second normally closed bi-bit bi-pass electromagnetic ball valve oil-in join;
The rodless cavity of described 3-position 4-way solenoid operated directional valve the first oil-out and described tail-gate hoist cylinder joins, described 3-position 4-way solenoid operated directional valve the second oil-out and the described first normally closed bi-bit bi-pass electromagnetic ball valve oil-in join, and described 3-position 4-way solenoid operated directional valve oil return opening and fuel tank join;
The rod chamber that connects after the described first normally closed bi-bit bi-pass electromagnetic ball valve oil-out and the described second normally closed bi-bit bi-pass electromagnetic ball valve oil-out join with described tail-gate hoist cylinder joins;
Described overflow valve oil return opening, electromagnetic relief valve oil-out, described fixed pressure reducing valve drain tap, the second two-position four-way solenoid operated directional valve oil return opening, described the first two-position four-way solenoid operated directional valve oil return opening and oil-out all join with fuel tank.
2. a kind of hydraulic system of controlling end gate of pavement milling and planning machine according to claim 1, it is characterized in that: described 3-position 4-way solenoid operated directional valve Median Function is the Y type.
3. a kind of hydraulic system of controlling end gate of pavement milling and planning machine according to claim 1, it is characterized in that: described fixed pressure reducing valve oil-out connects the second normally closed bi-bit bi-pass electromagnetic ball valve oil-in behind the second two-position four-way solenoid operated directional valve, described fixed pressure reducing valve pressure is 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102900014A true CN102900014A (en) | 2013-01-30 |
| CN102900014B 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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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899587A (en) * | 2014-04-23 | 2014-07-02 | 湖南联智桥隧技术有限公司 | Synchronous jacking hydraulic control system |
| CN104074816A (en) * | 2014-06-23 | 2014-10-01 | 湖南三一路面机械有限公司 | Milling machine tail door control system and milling machine |
| CN104500485A (en) * | 2014-12-25 | 2015-04-08 | 柳工无锡路面机械有限公司 | Hydraulic system for floating of scraper of pavement milling machine |
| 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 |
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| 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 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899587A (en) * | 2014-04-23 | 2014-07-02 | 湖南联智桥隧技术有限公司 | Synchronous jacking hydraulic control system |
| CN104074816A (en) * | 2014-06-23 | 2014-10-01 | 湖南三一路面机械有限公司 | Milling machine tail door control system and milling machine |
| 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 |
| CN104500485A (en) * | 2014-12-25 | 2015-04-08 | 柳工无锡路面机械有限公司 | Hydraulic system for floating of scraper of pavement 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 |
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| CN102900014B (en) | 2015-04-22 |
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Granted publication date: 20150422 Termination date: 20180928 |