CN108316096B - Integrated control hydraulic system of road paver and control method thereof - Google Patents
Integrated control hydraulic system of road paver and control method thereof Download PDFInfo
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- CN108316096B CN108316096B CN201810057325.1A CN201810057325A CN108316096B CN 108316096 B CN108316096 B CN 108316096B CN 201810057325 A CN201810057325 A CN 201810057325A CN 108316096 B CN108316096 B CN 108316096B
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- valve
- paver
- way
- screed
- cylinder
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Machines (AREA)
Abstract
The invention relates to an integrated control hydraulic system of a road paver and a control method thereof, wherein the system comprises a screed plate adjusting mechanism, a hopper adjusting mechanism and a crawler tensioning mechanism; the screed adjusting mechanism comprises a micro-motion leveling mechanism, a lifting mechanism and a telescopic mechanism; the crawler tensioning mechanism comprises a one-way valve and an overflow valve, the third oil way flows to the crawler tensioning cylinder of the paver after passing through the overflow valve and the one-way valve, and the overflow valve is arranged between the crawler tensioning cylinder of the paver and the hydraulic oil tank. The integrated control hydraulic system of the road paver and the control method thereof have the advantages of high integration level and higher cost performance.
Description
Technical Field
The invention relates to an integrated hydraulic control system and a control method thereof, in particular to an integrated control hydraulic system applied to a road paver and a control method thereof, and belongs to the technical field of paver control.
Background
The operation process of the paver is actually the process of paving the road surface, and auxiliary actions are needed to be carried out on mechanisms such as a screed plate of the paver in the paving process to ensure the construction requirements; the paver has the functions of lifting and lowering the screed and tensioning the walking caterpillar when walking, so that the paver needs to have the functions of independently micro-moving the screed to level the pavement, opening and closing the hopper for discharging and stretching and shortening the telescopic screed when in construction; most pavers realizing the functions adopt a plurality of sets of control to independently work, and have higher cost; the traditional paver has independent element control on the lifting function, the micro-motion road surface leveling function, the walking track tensioning function, the hopper opening and closing function and the extension and shortening functions of the telescopic screed; in order to realize the functions, the components are multiple, the pipeline connection is complex, the components are difficult to arrange in a limited space, and the maintainability is poor, so that the production cost of the whole machine is improved to a great extent, and more practical and better products are not brought to users. In this way, the development of the paver, especially sales and market share, is greatly restricted by the higher machine manufacturing cost in the face of increasingly strong market competition; because cost performance is a key factor that users have to consider when purchasing pavers.
Disclosure of Invention
The invention aims to overcome the defects and provide the integrated control hydraulic system of the road paver and the control method thereof, wherein the integrated control hydraulic system has high integration level and more cost performance advantage.
The purpose of the invention is realized in the following way:
an integrated control hydraulic system of a road paver is characterized in that: the system comprises a screed plate adjusting mechanism, a hopper adjusting mechanism and a track tensioning mechanism;
the screed adjusting mechanism comprises a micro-motion leveling mechanism, a lifting mechanism and a telescopic mechanism; the hydraulic oil in the hydraulic oil tank is pressurized by a pump and then divided into a first oil way, a second oil way and a third oil way by two cascaded priority flow valves; the first oil way is divided into two ways by the flow dividing and collecting valve, and then flows to the screed micro-leveling cylinder of the paver to form a micro-leveling mechanism by the two-way overflow valve, the hydraulic lock and the one-way speed regulating valve after passing through the H-shaped electromagnetic reversing valve; the second oil way is divided into two paths through an electromagnetic overflow valve and a Y-shaped electromagnetic reversing valve, one path is directly communicated with the two paver screed lifting cylinders, and the other path is divided into two paths through a flow dividing and collecting valve and then is respectively introduced into the two paver screed lifting cylinders to form a lifting mechanism; the telescopic mechanisms are symmetrically provided with two groups, and the second oil way is communicated to a screed telescopic cylinder of the paver after passing through a Y-shaped electromagnetic reversing valve and then passing through a hydraulic lock and a one-way speed regulating valve;
the hopper adjusting mechanisms are provided with two groups, each group of hopper adjusting mechanism comprises an O-shaped electromagnetic reversing valve, an overflow valve, a first hopper cylinder and a second hopper cylinder, a second oil way enters the O-shaped electromagnetic reversing valve after being damped, one of two paths of hydraulic oil flowing out of the O-shaped electromagnetic reversing valve flows into the first hopper cylinder through the overflow valve, and the other path flows into the first hopper cylinder and the second hopper cylinder;
the crawler tensioning mechanism comprises a one-way valve and an overflow valve, the third oil way flows to the crawler tensioning cylinder of the paver after passing through the overflow valve and the one-way valve, and the overflow valve is arranged between the crawler tensioning cylinder of the paver and the hydraulic oil tank.
In an initial state, a system oil inlet is communicated with a priority flow valve, a priority oil way of the flow priority valve is communicated with a paver screed leveling road system loop, a redundant oil way of the flow priority valve is communicated with the flow priority valve, a priority oil way of the flow priority valve is communicated with a paver walking crawler tensioning system loop, and a redundant oil way of the flow priority valve is communicated with a paver screed lifting and descending system, a paver hopper opening and closing system and a paver screed telescopic system respectively; the paver screed ascending and descending system, the paver hopper opening and closing system and the paver screed telescopic system adopt a connecting scheme of parallel oil paths;
the electromagnetic directional valve is a three-position four-way H-shaped electromagnetic directional valve with a median function, and the hydraulic lock realizes the function of locking a rod cavity and a rodless cavity of a screed micro-leveling cylinder of the paver and the switching function of telescoping the screed micro-leveling cylinder by controlling the power-off state of the electromagnetic directional valve; the movement speed of a micro-motion leveling cylinder of a screed of the paver is regulated through a one-way speed regulating valve; unloading excessive oil through a bidirectional overflow valve; the electromagnetic reversing valve is a three-position four-way Y-shaped electromagnetic reversing valve with a median function, and the floating and locking functions of the screed plate and the ascending and descending functions of the screed plate are realized by controlling the power-on and power-off states of the electromagnetic reversing valve; the whole smooth ascending and descending of the ironing plate are realized through the flow distributing and collecting valve; the electromagnetic reversing valve is a three-position four-way O-shaped electromagnetic reversing valve with a median function, and the switching function of opening and closing the hopper is realized by controlling the power-on and power-off state of the electromagnetic reversing valve; the rod cavity of the hopper oil cylinder is connected with the overflow valve in parallel to realize the opening and closing functions of the hopper system; the continuous pressure maintaining tensioning function is realized by connecting a main oil way, which is formed by connecting a paver crawler tensioning oil cylinder with an overflow valve in parallel, with a one-way valve in series and connecting the one-way valve with the main oil way overflow valve in parallel; the electromagnetic directional valve is a three-position four-way Y-shaped electromagnetic directional valve with a median function, and the hydraulic lock can realize the function of locking a rod cavity and a rodless cavity of a telescopic cylinder of the screed of the paver and the function of switching the telescopic cylinder of the screed of the paver by controlling the power-on and power-off state of the electromagnetic directional valve.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the screed plate adjusting mechanism, the hopper adjusting mechanism and the crawler tensioning mechanism are organically integrated on one system through the cooperative work of the O-shaped electromagnetic directional valves, the oil way system of the three-part functional loop is entirely arranged on one valve block in the actual use process, and when the hydraulic control system is used, all valve ports are only required to be connected with the mutual oil cylinders, so that the production and manufacturing cost of enterprises is greatly reduced, the later installation and maintenance are extremely convenient, and the hydraulic control system is beneficial to the manufacturing enterprises to occupy the market with better cost performance.
Drawings
Fig. 1 is a hydraulic circuit diagram of an integrated control hydraulic system of a road paver according to the present invention.
Wherein:
the hydraulic control system comprises a one-way speed regulating valve 1, a hydraulic lock 2, a two-way overflow valve 3, an electromagnetic directional valve 4, a flow distributing and collecting valve 5, a priority flow valve 6, an overflow valve 7, a pump 8, a hydraulic oil tank 9, an electromagnetic directional valve 10, an electromagnetic directional valve 11, an electromagnetic overflow valve 12, an electromagnetic directional valve 13, a damping 14, a one-way speed regulating valve 15, a one-way valve 16, a paver screed micro leveling cylinder 17, a paver screed lifting cylinder 18, a first hopper cylinder 19, a second hopper cylinder 20, a paver screed telescopic cylinder 21 and a paver track tensioning cylinder 22.
Detailed Description
Referring to fig. 1, the invention relates to an integrated control hydraulic system of a road paver, which comprises a screed adjusting mechanism, a hopper adjusting mechanism and a track tensioning mechanism;
the screed adjusting mechanism comprises a micro-motion leveling mechanism, a lifting mechanism and a telescopic mechanism; the hydraulic oil in the hydraulic oil tank 9 is pressurized by the pump 8 and then divided into a first oil way, a second oil way and a third oil way by the two cascaded priority flow valves 6; the first oil way is divided into two paths by a flow dividing and collecting valve 5, and flows to a screed micro-leveling cylinder 17 of the paver through a bi-directional overflow valve 3, a hydraulic lock 2 and a one-way speed regulating valve 1 after passing through an H-shaped electromagnetic reversing valve 4 to form a micro-leveling mechanism; the second oil way is divided into two paths through the electromagnetic overflow valve 12 and the Y-shaped electromagnetic reversing valve 11, one path is directly communicated with the two paver screed lifting cylinders 18, and the other path is divided into two paths through the flow dividing and collecting valve and then respectively introduced into the two paver screed lifting cylinders 18 to form a lifting mechanism; the telescopic mechanisms are symmetrically provided with two groups, and the second oil way is communicated to a screed telescopic cylinder 21 of the paver after passing through a Y-shaped electromagnetic reversing valve and then passing through a hydraulic lock and a one-way speed regulating valve 15;
the hopper adjusting mechanisms are provided with two groups, each group of hopper adjusting mechanism comprises an O-shaped electromagnetic directional valve 13, an overflow valve, a first hopper cylinder 19 and a second hopper cylinder 20, a second oil way enters the O-shaped electromagnetic directional valve 13 after being damped 14, one of two paths of hydraulic oil flowing out of the O-shaped electromagnetic directional valve 13 flows into the first hopper cylinder 19 through the overflow valve, and the other path flows into the first hopper cylinder 19 and the second hopper cylinder 20;
the crawler tensioning mechanism comprises a one-way valve 16 and an overflow valve, a third oil way flows to the crawler tensioning cylinder 22 of the paver after passing through the overflow valve and the one-way valve 16, and the overflow valve is arranged between the crawler tensioning cylinder 22 of the paver and the hydraulic oil tank 9; the overflow valve is a pilot overflow valve;
the working principle of the invention is as follows:
in an initial state, a system oil inlet P is communicated with a priority flow valve 6, a priority oil way of a flow priority valve 2 is communicated with a paver screed micro-leveling road surface system loop, an excess oil way of the flow priority valve 2 is communicated with a flow priority valve 12, a priority oil way of the flow priority valve 12 is communicated with a paver walking track tensioning system loop, and an excess oil way of the flow priority valve 12 is communicated with a paver screed ascending and descending system, a paver hopper opening and closing system and a paver screed telescopic system respectively. The paver screed ascending and descending system, the paver hopper opening and closing system and the paver screed telescopic system adopt a connecting scheme of parallel oil paths;
the electromagnetic directional valve 4 is a three-position four-way H-shaped electromagnetic directional valve with a median function, and the hydraulic lock 2 realizes the function of locking the screed micro-leveling cylinder 17 of the paver by a rod cavity and a rodless cavity and the switching function of the screed leveling micro-leveling cylinder 17 expansion and contraction by controlling the power-off state of the electromagnetic directional valve; the movement speed of the screed micro-leveling cylinder 17 of the paver is regulated by the one-way speed regulating valve 1. Excess oil is unloaded by the bi-directional relief valve 3. The electromagnetic reversing valve 11 is a three-position four-way Y-shaped electromagnetic reversing valve with a median function, and realizes the floating and locking functions of the screed and the rising and falling functions of the screed by controlling the power-on and power-off states of the electromagnetic reversing valve. The flow distributing and collecting valve 5 realizes the whole smooth ascending and descending of the screed plate. The electromagnetic reversing valve 13 is a three-position four-way O-shaped electromagnetic reversing valve with a median function, and the switching function of opening and closing the hopper is realized by controlling the power-on and power-off state of the electromagnetic reversing valve. The opening and closing functions of the hopper system are realized by connecting the hopper cylinder 20 with the rodless cavity of the hopper cylinder 19 in parallel and connecting the rod cavity of the hopper cylinder 19 with the overflow valve 7 in parallel. The main oil way of the paver track tensioning cylinder 22 connected with the overflow valve 7 in parallel is connected with the one-way valve 16 in series, and the one-way valve 16 is connected with the main oil way overflow valve 7 in parallel to realize the function of lasting pressure maintaining tensioning. The electromagnetic directional valve 11 is a three-position four-way Y-shaped electromagnetic directional valve with a median function, and the hydraulic lock 2 can realize the function of locking the telescopic cylinder 21 of the screed of the paver by a rod cavity and a rodless cavity and the function of switching the telescopic cylinder 21 of the screed of the paver by controlling the power-off state of the electromagnetic directional valve.
In addition: it should be noted that the above embodiment is only one of the optimization schemes of this patent, and any modification or improvement made by those skilled in the art according to the above concepts is within the scope of this patent.
Claims (2)
1. An integrated control hydraulic system of a road paver is characterized in that: the system comprises a screed plate adjusting mechanism, a hopper adjusting mechanism and a track tensioning mechanism;
the screed adjusting mechanism comprises a micro-motion leveling mechanism, a lifting mechanism and a telescopic mechanism; the hydraulic oil in the hydraulic oil tank is pressurized by a pump and then divided into a first oil way, a second oil way and a third oil way by two cascaded priority flow valves; the first oil way is divided into two ways by the flow dividing and collecting valve, and then flows to the screed micro-leveling cylinder of the paver to form a micro-leveling mechanism by the two-way overflow valve, the hydraulic lock and the one-way speed regulating valve after passing through the H-shaped electromagnetic reversing valve; the second oil way is divided into two paths through an electromagnetic overflow valve and a Y-shaped electromagnetic reversing valve, one path is directly communicated with the two paver screed lifting cylinders, and the other path is divided into two paths through a flow dividing and collecting valve and then is respectively introduced into the two paver screed lifting cylinders to form a lifting mechanism; the telescopic mechanisms are symmetrically provided with two groups, and the second oil way is communicated to a screed telescopic cylinder of the paver after passing through a Y-shaped electromagnetic reversing valve and then passing through a hydraulic lock and a one-way speed regulating valve;
the hopper adjusting mechanisms are provided with two groups, each group of hopper adjusting mechanism comprises an O-shaped electromagnetic reversing valve, an overflow valve, a first hopper cylinder and a second hopper cylinder, a second oil way enters the O-shaped electromagnetic reversing valve after being damped, one of two paths of hydraulic oil flowing out of the O-shaped electromagnetic reversing valve flows into the first hopper cylinder through the overflow valve, and the other path flows into the first hopper cylinder and the second hopper cylinder;
the crawler tensioning mechanism comprises a one-way valve and an overflow valve, the third oil way flows to the crawler tensioning cylinder of the paver after passing through the overflow valve and the one-way valve, and the overflow valve is arranged between the crawler tensioning cylinder of the paver and the hydraulic oil tank;
the overflow valve is a pilot overflow valve.
2. The control method of the integrated control hydraulic system of the road paver as claimed in claim 1, wherein: in an initial state, a system oil inlet (P) is communicated with a priority flow valve (6), a priority oil way of the priority flow valve (6) is communicated with a paver screed micro-leveling road system loop, a redundant oil way of the priority flow valve (6) is communicated with an electromagnetic overflow valve (12), a priority oil way of the electromagnetic overflow valve (12) is communicated with a paver walking crawler tensioning system loop, and a redundant oil way of the electromagnetic overflow valve (12) is respectively communicated with a paver screed lifting and descending system, a paver hopper opening and closing system and a paver screed telescopic system; the paver screed ascending and descending system, the paver hopper opening and closing system and the paver screed telescopic system adopt a connecting scheme of parallel oil paths;
the H-shaped electromagnetic reversing valve (4) is a three-position four-way electromagnetic reversing valve with an H-shaped middle position function, and the hydraulic lock (2) can realize the switching function of locking a rod cavity and a rodless cavity of a paver screed micro-motion leveling cylinder (17) and the telescoping of the paver screed micro-motion leveling cylinder (17) by controlling the power-off state of the H-shaped electromagnetic reversing valve; the movement speed of a micro-motion leveling cylinder (17) of a screed of the paver is regulated through a one-way speed regulating valve (1); unloading excessive oil through a bidirectional overflow valve (3); the Y-shaped electromagnetic reversing valve (11) is a three-position four-way electromagnetic reversing valve with a Y-shaped median function, and the floating and locking functions and the ascending and descending functions of the ironing plate are realized by controlling the power-on and power-off state of the Y-shaped electromagnetic reversing valve; the whole leveling rising and falling of the ironing plate are realized through the flow distributing and collecting valve (5); the O-shaped electromagnetic reversing valve (13) is a three-position four-way electromagnetic reversing valve with an O-shaped median function, and the switching function of opening and closing the hopper is realized by controlling the power-on and power-off state of the O-shaped electromagnetic reversing valve; the rod-free cavity of the first hopper cylinder (19) is connected in parallel with the overflow valve through the second hopper cylinder (20), so that the opening and closing function of the hopper system is realized; the continuous pressure maintaining tensioning function is realized by connecting a main oil way of a paver track tensioning oil cylinder (22) which is connected with an overflow valve in parallel with a one-way valve (16) in series and connecting the one-way valve (16) with the main oil way overflow valve in parallel; the Y-shaped electromagnetic reversing valve (11) is a three-position four-way electromagnetic reversing valve with a Y-shaped median function, and the hydraulic lock (2) can realize the functions of locking a rod cavity and a rodless cavity of the telescopic cylinder (21) of the screed of the paver and the telescopic switching function of the telescopic cylinder (21) of the screed of the paver by controlling the power-off state of the Y-shaped electromagnetic reversing valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810057325.1A CN108316096B (en) | 2018-01-22 | 2018-01-22 | Integrated control hydraulic system of road paver and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810057325.1A CN108316096B (en) | 2018-01-22 | 2018-01-22 | Integrated control hydraulic system of road paver and control method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN108316096A CN108316096A (en) | 2018-07-24 |
| CN108316096B true CN108316096B (en) | 2023-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810057325.1A Active CN108316096B (en) | 2018-01-22 | 2018-01-22 | Integrated control hydraulic system of road paver and control method thereof |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110056552B (en) * | 2019-03-27 | 2020-07-10 | 中铁隧道股份有限公司 | Integral slag turning workbench hydraulic system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2112327A1 (en) * | 1971-03-15 | 1972-10-12 | Demag Baumaschinen Gmbh | Hydraulic drive for a road paver |
| CN202081364U (en) * | 2011-04-28 | 2011-12-21 | 天津鼎盛工程机械有限公司 | Hydraulic crawler-type minitype asphalt paver |
| CN104047914A (en) * | 2014-07-03 | 2014-09-17 | 戴纳派克（中国）压实摊铺设备有限公司 | Floating screed control system of paver and paver |
| 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 |
| CN206204739U (en) * | 2016-11-18 | 2017-05-31 | 徐工集团工程机械股份有限公司 | Paver hydraulic control system and paver |
-
2018
- 2018-01-22 CN CN201810057325.1A patent/CN108316096B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2112327A1 (en) * | 1971-03-15 | 1972-10-12 | Demag Baumaschinen Gmbh | Hydraulic drive for a road paver |
| CN202081364U (en) * | 2011-04-28 | 2011-12-21 | 天津鼎盛工程机械有限公司 | Hydraulic crawler-type minitype asphalt paver |
| CN104047914A (en) * | 2014-07-03 | 2014-09-17 | 戴纳派克（中国）压实摊铺设备有限公司 | Floating screed control system of paver and paver |
| 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 |
| CN206204739U (en) * | 2016-11-18 | 2017-05-31 | 徐工集团工程机械股份有限公司 | Paver hydraulic control system and paver |
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| CN108316096A (en) | 2018-07-24 |
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