CN102995523A - Hydraulic control device of ironing plate of paver - Google Patents
Hydraulic control device of ironing plate of paver Download PDFInfo
- Publication number
- CN102995523A CN102995523A CN2012103302517A CN201210330251A CN102995523A CN 102995523 A CN102995523 A CN 102995523A CN 2012103302517 A CN2012103302517 A CN 2012103302517A CN 201210330251 A CN201210330251 A CN 201210330251A CN 102995523 A CN102995523 A CN 102995523A
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- valve
- solenoid operated
- way solenoid
- mouth
- operated directional
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Abstract
The invention discloses a hydraulic control device of an ironing plate of a paver, and belongs to the technical field of pavers. The hydraulic control device comprises a hydraulic pump, a control combination valve bank, a left two-position two-way electromagnetic reversing valve, a right two-position two-way electromagnetic reversing valve, an ironing-plate left oil cylinder and an ironing-plate right oil cylinder, wherein the hydraulic pump is connected with the port P of the control combination valve bank, the port A1 of the control combination valve bank is connected with the rod cavity of the ironing-plate right oil cylinder, the port A2 of the control combination valve bank is connected with the rod cavity of the ironing-plate left oil cylinder, the port B of the control combination valve bank is respectively connected with the left two-position two-way electromagnetic reversing valve and the right two-position two-way electromagnetic reversing valve, the left two-position two-way electromagnetic reversing valve is connected with the rodless cavity of the ironing-plate left oil cylinder, the right two-position two-way electromagnetic reversing valve is connected with the rodless cavity of the ironing-plate right oil cylinder, and the port C of the control combination valve bank is connected with a pressure relay. The hydraulic control device has the beneficial effect of ensuring that the ironing plate in a suspension state descends slowly, so that the ironing plate is prevented from deformation or damage caused during rapid descending.
Description
Technical field
The present invention relates to a kind of hydraulic control device, specifically a kind of paver screed hydraulic control device belongs to the paver technical field.
Background technology
Paver mainly is comprised of a plurality of important system, and leveling large arm in the left and right sides is hinged by towing point one end and main frame, and the other end links to each other with screed.Leveling arm and screed are the equipments of paver, finish paving and preliminary jolt ramming of bituminous mixture by this device.The situation of working installations of paver directly or indirectly affects the pavement spread situation, and the situation of screed plays conclusive effect to the quality of road quality, therefore the screed of paver is controlled design and maintaining is very important, present existing paver ironing is pulled control combination valve group and is had certain defective, when ironing is pulled when being in suspended state, if faulty operation, screed will be done the movement of falling object because of self gravitation and be dropped rapidly to ground location, thereby cause screed distortion or damage, delay the duration, and cause unnecessary economic loss.
Summary of the invention
Problem for above-mentioned prior art exists the invention provides a kind of paver screed hydraulic control device, and the screed that is under the vacant state is landed slowly, thus the distortion or the damage that have caused when having avoided screed to land fast.
To achieve these goals, the technical solution used in the present invention is: a kind of paver screed hydraulic control device, comprise hydraulic pump, control combination valve group, left 2/2-way solenoid operated directional valve, right 2/2-way solenoid operated directional valve, the left oil cylinder of screed and the right oil cylinder of screed, hydraulic pump is connected with the P mouth of control combination valve group, the A1 mouth of control combination valve group is connected with the rod chamber of the right oil cylinder of screed, the A2 mouth of control combination valve group is connected with the rod chamber of the left oil cylinder of screed, the B mouth of control combination valve group respectively with left 2/2-way solenoid operated directional valve be connected the 2/2-way solenoid operated directional valve and be connected, left 2/2-way solenoid operated directional valve is connected with the rodless cavity of the left oil cylinder of screed, right 2/2-way solenoid operated directional valve is connected with the rodless cavity of the right oil cylinder of screed, the C mouth of control combination valve group is connected with pressure switch, described control combination valve group comprises the A1 mouth, the A2 mouth, the B mouth, the C mouth, the P mouth, overflow valve, often drive the 2/2-way solenoid operated directional valve, the first normally closed 2/2-way solenoid operated directional valve, the second normally closed 2/2-way solenoid operated directional valve, the 3rd normally closed 2/2-way solenoid operated directional valve, one way valve, the first throttle valve, the second choke valve, the 3rd choke valve and the 4th choke valve, the P mouth is connected with overflow valve, often drive the 2/2-way solenoid operated directional valve and be connected in parallel on the overflow valve two ends, an end of often driving the 2/2-way solenoid operated directional valve is connected with an end of the 3rd normally closed 2/2-way solenoid operated directional valve, the other end of the 3rd normally closed 2/2-way solenoid operated directional valve by the 4th choke valve and one way valve respectively with the second choke valve, the A1 mouth is connected with the A2 mouth, the second choke valve is connected with the C mouth, the other end of often driving the 2/2-way solenoid operated directional valve respectively with the B mouth, the first throttle valve connects with the 3rd choke valve, first throttle valve and the 3rd choke valve respectively with an end of the first normally closed 2/2-way solenoid operated directional valve be connected an end of normally closed 2/2-way solenoid operated directional valve and be connected, the other end of the first normally closed 2/2-way solenoid operated directional valve respectively with the A2 mouth be connected choke valve and be connected, the other end of the second normally closed 2/2-way solenoid operated directional valve respectively with the A1 mouth be connected choke valve and be connected.
Compared with prior art, hydraulic control valve group of the present invention can make the screed that is under the vacant state land slowly, thereby the distortion or the damage that have caused when having avoided screed to land have fast guaranteed the quality of screed to have prolonged application life; Adopt simultaneously the structure of left and right sides 2/2-way solenoid operated directional valve, can prevent effectively that screed from running into the anti-phenomenon of climbing of hard thing in the special operation process, guaranteed spreading quality, improved operating efficiency.
Description of drawings
Fig. 1 is hydraulic schematic diagram of the present invention.
Among the figure: 1, hydraulic pump, 2, control combination valve group, 3, left 2/2-way solenoid operated directional valve, 4, right 2/2-way solenoid operated directional valve, 5, the left oil cylinder of screed, 6, the right oil cylinder of screed, 7, overflow valve, the 8, first normally closed 2/2-way solenoid operated directional valve, 9, first throttle valve, 10, often drive the 2/2-way solenoid operated directional valve, the 11, second choke valve, 12, one way valve, 13, the second normally closed 2/2-way solenoid operated directional valve, 14, the 3rd choke valve, the 15, the 4th choke valve, the 16, the 3rd normally closed 2/2-way solenoid operated directional valve.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 1, the present invention includes hydraulic pump 1, control combination valve group 2, left 2/2-way solenoid operated directional valve 3, right 2/2-way solenoid operated directional valve 4, the left oil cylinder 5 of screed and the right oil cylinder 6 of screed, hydraulic pump 1 is connected with the P mouth of control combination valve group 2, the A1 mouth of control combination valve group 2 is connected with the rod chamber of the right oil cylinder 6 of screed, the A2 mouth of control combination valve group 2 is connected with the rod chamber of the left oil cylinder 5 of screed, the B mouth of control combination valve group 2 respectively with left 2/2-way solenoid operated directional valve 3 be connected 2/2-way solenoid operated directional valve 4 and be connected, left 2/2-way solenoid operated directional valve 3 is connected with the rodless cavity of the left oil cylinder 5 of screed, right 2/2-way solenoid operated directional valve 4 is connected with the rodless cavity of the right oil cylinder 6 of screed, the C mouth of control combination valve group 2 is connected with pressure switch, described control combination valve group 2 comprises the A1 mouth, the A2 mouth, the B mouth, the C mouth, the P mouth, overflow valve 7, often drive 2/2-way solenoid operated directional valve 10, the first normally closed 2/2-way solenoid operated directional valve 8, the second normally closed 2/2-way solenoid operated directional valve 13, the 3rd normally closed 2/2-way solenoid operated directional valve 16, one way valve 12, first throttle valve 9, the second choke valve 11, the 3rd choke valve 14 and the 4th choke valve 15, the P mouth is connected with overflow valve 7, often drive 2/2-way solenoid operated directional valve 10 and be connected in parallel on overflow valve 7 two ends, an end of often driving 2/2-way solenoid operated directional valve 10 is connected with an end of the 3rd normally closed 2/2-way solenoid operated directional valve 16, the other end of the 3rd normally closed 2/2-way solenoid operated directional valve 16 by the 4th choke valve 15 and one way valve 12 respectively with the second choke valve 11, the A1 mouth is connected with the A2 mouth, the second choke valve 11 is connected with the C mouth, the other end of often driving 2/2-way solenoid operated directional valve 10 respectively with the B mouth, first throttle valve 9 connects with the 3rd choke valve 14, first throttle valve 9 and the 3rd choke valve 14 respectively with an end of the first normally closed 2/2-way solenoid operated directional valve 8 be connected an end of normally closed 2/2-way solenoid operated directional valve 13 and be connected, the other end of the first normally closed 2/2-way solenoid operated directional valve 8 respectively with the A2 mouth be connected choke valve 11 and be connected, the other end of the second normally closed 2/2-way solenoid operated directional valve 13 respectively with the A1 mouth be connected choke valve 11 and be connected.
When oil cylinder carries out ascending motion, hydraulic oil enters the P mouth of control combination valve group 2 successively through often opening 2/2-way solenoid operated directional valve 10, the 3rd normally closed 2/2-way solenoid operated directional valve 16, the 4th choke valve 15 and one way valve 12, then the rod chamber that enters respectively the left oil cylinder 5 of screed of A2 mouth and the A1 mouth by control combination valve group 2 and the rod chamber of the right oil cylinder 6 of screed carry out ascending motion;
When oil cylinder descended, hydraulic oil entered control combination valve group 2 by A1 mouth and the A2 mouth of control combination valve group 2, then is back to fuel tank through the first normally closed 2/2-way solenoid operated directional valve 8 and first throttle valve 9;
When oil cylinder floats motion, hydraulic oil is successively by the 3rd choke valve 14 and the second normally closed 2/2-way solenoid operated directional valve 13, then the rod chamber that enters respectively the left oil cylinder 5 of screed from A2 mouth and the A1 mouth of control combination valve group 2 and the rod chamber of the right oil cylinder 6 of screed, the motion of floating.
Owing to be provided with choke valve in three oil circuits, therefore when maloperation occured, hydraulic oil can slowly reflux, left and right sides oil cylinder slow decreasing, thus make the screed slow decreasing, the distortion or the damage that have caused when having avoided screed to land fast.
Claims (1)
1. paver screed hydraulic control device, it is characterized in that, comprise hydraulic pump (1), control combination valve group (2), left 2/2-way solenoid operated directional valve (3), right 2/2-way solenoid operated directional valve (4), the left oil cylinder of screed (5) and the right oil cylinder of screed (6), hydraulic pump (1) is connected with the P mouth of control combination valve group (2), the A1 mouth of control combination valve group (2) is connected with the rod chamber of the right oil cylinder of screed (6), the A2 mouth of control combination valve group (2) is connected with the rod chamber of the left oil cylinder of screed (5), the B mouth of control combination valve group (2) respectively with left 2/2-way solenoid operated directional valve (3) be connected 2/2-way solenoid operated directional valve (4) and be connected, left 2/2-way solenoid operated directional valve (3) is connected with the rodless cavity of the left oil cylinder of screed (5), right 2/2-way solenoid operated directional valve (4) is connected with the rodless cavity of the right oil cylinder of screed (6), the C mouth of control combination valve group (2) is connected with pressure switch, described control combination valve group (2) comprises the A1 mouth, the A2 mouth, the B mouth, the C mouth, the P mouth, overflow valve (7), often drive 2/2-way solenoid operated directional valve (10), the first normally closed 2/2-way solenoid operated directional valve (8), the second normally closed 2/2-way solenoid operated directional valve (13), the 3rd normally closed 2/2-way solenoid operated directional valve (16), one way valve (12), first throttle valve (9), the second choke valve (11), the 3rd choke valve (14) and the 4th choke valve (15), the P mouth is connected with overflow valve (7), often drive 2/2-way solenoid operated directional valve (10) and be connected in parallel on overflow valve (7) two ends, an end of often driving 2/2-way solenoid operated directional valve (10) is connected with an end of the 3rd normally closed 2/2-way solenoid operated directional valve (16), the other end of the 3rd normally closed 2/2-way solenoid operated directional valve (16) by the 4th choke valve (15) and one way valve (12) respectively with the second choke valve (11), the A1 mouth is connected with the A2 mouth, the second choke valve (11) is connected with the C mouth, the other end of often driving 2/2-way solenoid operated directional valve (10) respectively with the B mouth, first throttle valve (9) connects with the 3rd choke valve (14), first throttle valve (9) and the 3rd choke valve (14) respectively with an end of the first normally closed 2/2-way solenoid operated directional valve (8) be connected an end of normally closed 2/2-way solenoid operated directional valve (13) and be connected, the other end of the first normally closed 2/2-way solenoid operated directional valve (8) respectively with the A2 mouth be connected choke valve (11) and be connected, the other end of the second normally closed 2/2-way solenoid operated directional valve (13) respectively with the A1 mouth be connected choke valve (11) and be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103302517A CN102995523A (en) | 2012-09-07 | 2012-09-07 | Hydraulic control device of ironing plate of paver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103302517A CN102995523A (en) | 2012-09-07 | 2012-09-07 | Hydraulic control device of ironing plate of paver |
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| Publication Number | Publication Date |
|---|---|
| CN102995523A true CN102995523A (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103302517A Pending CN102995523A (en) | 2012-09-07 | 2012-09-07 | Hydraulic control device of ironing plate of paver |
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| CN (1) | CN102995523A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206420A (en) * | 2013-04-03 | 2013-07-17 | 中联重科股份有限公司 | Paving machine, hydraulic circuit of screed plate of paving machine, hydraulic control system and control method |
| CN104805758A (en) * | 2015-03-16 | 2015-07-29 | 徐工集团工程机械股份有限公司道路机械分公司 | Multifunctional hydraulic system for controlling actions of screed of paver |
| CN106337352A (en) * | 2015-07-08 | 2017-01-18 | 中联重科股份有限公司 | Paver and paving control system thereof |
| CN106523446A (en) * | 2015-09-11 | 2017-03-22 | 徐工集团工程机械股份有限公司 | Hydraulic control system and paver |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55101903U (en) * | 1978-12-28 | 1980-07-16 | ||
| EP0968334B1 (en) * | 1997-03-21 | 2002-06-12 | Mannesmann Rexroth Aktiengesellschaft | Hydraulic control system for a mobile work machine, especially a wheel loader |
| CN201891064U (en) * | 2010-12-02 | 2011-07-06 | 成都市新筑路桥机械股份有限公司 | Ironing loading and unloading control system for spreading machine |
| CN202369903U (en) * | 2011-11-24 | 2012-08-08 | 陕西中大机械集团有限责任公司 | Hydraulic system for lifting ironing plate of paving machine |
| CN202387725U (en) * | 2011-11-21 | 2012-08-22 | 中色科技股份有限公司 | Hydraulic control loop of ironing roller device |
| CN202881826U (en) * | 2012-09-07 | 2013-04-17 | 徐州万邦道路工程装备服务股份公司 | Hydraulic control device for screed of paver |
-
2012
- 2012-09-07 CN CN2012103302517A patent/CN102995523A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55101903U (en) * | 1978-12-28 | 1980-07-16 | ||
| EP0968334B1 (en) * | 1997-03-21 | 2002-06-12 | Mannesmann Rexroth Aktiengesellschaft | Hydraulic control system for a mobile work machine, especially a wheel loader |
| CN201891064U (en) * | 2010-12-02 | 2011-07-06 | 成都市新筑路桥机械股份有限公司 | Ironing loading and unloading control system for spreading machine |
| CN202387725U (en) * | 2011-11-21 | 2012-08-22 | 中色科技股份有限公司 | Hydraulic control loop of ironing roller device |
| CN202369903U (en) * | 2011-11-24 | 2012-08-08 | 陕西中大机械集团有限责任公司 | Hydraulic system for lifting ironing plate of paving machine |
| CN202881826U (en) * | 2012-09-07 | 2013-04-17 | 徐州万邦道路工程装备服务股份公司 | Hydraulic control device for screed of paver |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206420A (en) * | 2013-04-03 | 2013-07-17 | 中联重科股份有限公司 | Paving machine, hydraulic circuit of screed plate of paving machine, hydraulic control system and control method |
| CN103206420B (en) * | 2013-04-03 | 2016-01-13 | 中联重科股份有限公司 | Paver and screed oil hydraulic circuit, hydraulic control system and controlling method |
| CN104805758A (en) * | 2015-03-16 | 2015-07-29 | 徐工集团工程机械股份有限公司道路机械分公司 | Multifunctional hydraulic system for controlling actions of screed of paver |
| CN106337352A (en) * | 2015-07-08 | 2017-01-18 | 中联重科股份有限公司 | Paver and paving control system thereof |
| CN106337352B (en) * | 2015-07-08 | 2019-01-08 | 中联重科股份有限公司 | Paver and its control system that paves |
| CN106523446A (en) * | 2015-09-11 | 2017-03-22 | 徐工集团工程机械股份有限公司 | Hydraulic control system and paver |
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Application publication date: 20130327 |