CN103287980B - Cantilever crane vertical lift control system - Google Patents
Cantilever crane vertical lift control system Download PDFInfo
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- CN103287980B CN103287980B CN201310261991.4A CN201310261991A CN103287980B CN 103287980 B CN103287980 B CN 103287980B CN 201310261991 A CN201310261991 A CN 201310261991A CN 103287980 B CN103287980 B CN 103287980B
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Abstract
The invention discloses a cantilever crane vertical lift control system which comprises a plurality of telescopic oil cylinders, a plurality of pitch oil cylinders, a controller, an oil tank, an oil supply device, a variable pump, a linked valve group and a monitor, wherein the linked valve group comprises a telescopic reversing valve in three-position seven-way hydraulic control, a pitch reversing valve in three-position seven-way hydraulic control and four electric control reversing valves. The monitor provided by the invention can monitor the load running position in real time, and can feed back a signal to the controller; the controller feeds back a signal of an actuating element to the oil supply device and the variable pump, and pushes linked valves to the relevant positions, and further regulates the action amplitude of the telescopic oil cylinders and the pitch oil cylinders so as to achieve vertical lift. The cantilever crane vertical lift control system provided by the invention is simple in structure, can enable a cantilever crane to lift vertically, can lower the accident occurrence probability, and can shorten the lift time of lifting appliances.
Description
Technical field
The present invention relates to control system, especially a kind of construction machinery and equipment jib vertical lift control system.
Background technology
At present, the lifting of the lifting of construction machinery and equipment, especially front swing-machine is mainly to rely on the action of jib telescopic oil cylinder and pitching oil cylinder to realize.In order to save time, increase work efficiency, before realizing operating mode, generally all can design a key and start system, make suspender reach working condition requirement.As shown in Figure 2, a key of the lifting of construction machinery and equipment at present starts system, is all first to start pitching oil cylinder to play arm, suspender motion engineering is from A to C, after waiting pitching to play width to put in place, just starts telescopic oil cylinder, suspender motion engineering is from C to B, allows telescopic oil cylinder stretch out and puts in place; After completing operating mode, while a key to retract, telescopic oil cylinder first starts from B to C retracts and puts in place, restarts the pitching oil cylinder arm that falls from C to A, and suspender is playbacked.The operational process of this control system not only can make actuating unit can reach space to become large, and the Probability of increase accident greatly also can extend time of sling lifting, greatly reduces the work efficiency of construction machinery and equipment.
Summary of the invention
The object of the present invention is to provide after a kind of can monitoring in real time by spreader position the jib vertical lift control system that jib telescopic oil cylinder and pitching oil cylinder are linked.
Jib vertical lift control system provided by the invention, comprise some telescopic oil cylinders, some pitching oil cylinders, controller, fuel tank and feed apparatus, also comprise a controllable capacity pump, interstage valve group and monitor, described interstage valve group comprises the flexible change-over valve of three seven logical hydraulic controls, pitching change-over valve and four electric control reversing valves of three seven logical hydraulic controls, the oil suction of described controllable capacity pump is connected with fuel tank, the oil outlet of this controllable capacity pump is connected with the P mouth of flexible change-over valve or the P mouth of pitching change-over valve respectively, the A of described flexible change-over valve, the A of D mouth and pitching change-over valve, D mouth is connected with the control mouth of controllable capacity pump by check valve respectively, the B mouth of described flexible change-over valve and the rod chamber of telescopic oil cylinder, the C mouth of the rodless cavity of telescopic oil cylinder and flexible change-over valve, the B mouth of pitching change-over valve and the rod chamber of pitching oil cylinder, the rodless cavity of pitching oil cylinder is connected respectively with the C mouth of pitching change-over valve, each T1 of described flexible change-over valve and pitching change-over valve, T2 mouth is all connected with fuel tank, each control chamber of described flexible change-over valve and pitching change-over valve is connected with fuel tank or feed apparatus by the electric control reversing valve of a correspondence respectively, described monitor is arranged on the extension bar of telescopic oil cylinder for monitoring the real time position of jib and sending feedback signal to controller, the electromagnet that described controller is controlled each electric control reversing valve obtains electric or dead electricity.
In order better to control telescopic oil cylinder and pitching cylinder action amplitude, the present invention also comprises some unloader valves, between the B mouth of described flexible change-over valve and the rod chamber of telescopic oil cylinder, between the rodless cavity of telescopic oil cylinder and the C mouth of flexible change-over valve, be connected with fuel tank by unloader valve described in respectively between the rodless cavity of pitching oil cylinder and the C mouth of pitching change-over valve.
For guaranteeing that the pressure of whole system is used safety, the outgate of each T1 of described flexible change-over valve and pitching change-over valve, T2 mouth, each unloader valve all passes through a by pass valve and is connected with the control mouth of controllable capacity pump.
For guaranteeing the safety that flows to of whole system hydraulic oil, the oil outlet of described controllable capacity pump is connected with the P mouth of flexible change-over valve or the P mouth of pitching change-over valve respectively by a check valve.
Monitor of the present invention can be monitored the position of load running in real time, and by signal feedback to controller, the signal of controller feedback power element, to feed apparatus and controllable capacity pump, promotes interstage valve to relative stations, and then the movement range of adjusting telescopic oil cylinder and pitching oil cylinder, realize vertical lift.The present invention is simple in structure, can realize the vertical lift of jib, and reduction accident occurrence probability shortens the sling lifting time.
Accompanying drawing explanation
Fig. 1 is hydraulic principle schematic diagram of the present invention.
Fig. 2 is that front swing-machine vertical operation sketch during as example is take in the present invention.
Diagram of circuit when Fig. 3 is jib vertical lift control method vertical uplift provided by the invention.
Fig. 4 is jib vertical lift control method provided by the invention diagram of circuit while vertically declining.
The specific embodiment
As can be seen from Figure 1, this jib vertical lift of the present invention control system, comprises some telescopic oil cylinders 1, some pitching oil cylinders 2, controllable capacity pump 3, interstage valve group 4, monitor 5, some unloader valves 6, by pass valve 7, some check valves, controller, fuel tank and feed apparatus, wherein interstage valve group comprises the flexible change-over valve 41 of three seven logical hydraulic controls, the pitching change-over valve of three seven logical hydraulic controls, four electric control reversing valves 43, 44, 45, 46, the oil suction of controllable capacity pump 3 is connected with fuel tank, and its oil outlet is connected with the P mouth of flexible change-over valve 41 or the P mouth of pitching change-over valve respectively by a check valve, the A of flexible change-over valve 41, the A of D mouth and pitching change-over valve, D mouth is connected with the control mouth of controllable capacity pump 3 by check valve respectively, the flexible B mouth of change-over valve 41 and the rod chamber of telescopic oil cylinder 1, the C mouth of the rodless cavity of telescopic oil cylinder 1 and flexible change-over valve 41, the B mouth of pitching change-over valve and the rod chamber of pitching oil cylinder 2, the rodless cavity of pitching oil cylinder 2 is connected respectively with the C mouth of pitching change-over valve, each T1 of flexible change-over valve 41 and pitching change-over valve, T2 mouth is all connected with fuel tank, the a position of flexible change-over valve 41 is connected with fuel tank or feed apparatus by electric control reversing valve 43, the b position of flexible change-over valve 41 is connected with fuel tank or feed apparatus by electric control reversing valve 44, the a position of pitching change-over valve is connected with fuel tank or feed apparatus by electric control reversing valve 45, the b position of pitching change-over valve is connected with fuel tank or feed apparatus by electric control reversing valve 46, monitor 5 is arranged on the extension bar of telescopic oil cylinder 1 for monitoring the real time position of jib and sending feedback signal to controller, the electromagnet that controller is controlled each electric control reversing valve obtains electric or dead electricity, between the flexible B mouth of change-over valve 41 and the rod chamber of telescopic oil cylinder 1, between the C mouth of the rodless cavity of telescopic oil cylinder 1 and flexible change-over valve 41, between the C mouth of the rodless cavity of pitching oil cylinder 2 and pitching change-over valve, by unloader valve 6, be connected with fuel tank respectively, each T1 of flexible change-over valve 41 and pitching change-over valve, T2 mouth, the outgate of each unloader valve 6 all passes through by pass valve 7 and is connected with the control mouth of controllable capacity pump 3.
Course of action of the present invention is as follows:
1, as shown in Figures 2 and 3, the present invention is in uphill process, and the P mouth of flexible change-over valve 41 is connected with B mouth with A mouth with D mouth, T1 mouth with C mouth, and the P mouth of pitching change-over valve is connected with B mouth with A mouth with D mouth, T1 mouth with C mouth, jib carries out vertical uplift, and suspender is from A-B operation.Meanwhile, the real-time observing and controlling suspender state of monitor 5, when suspender is inside A-B, controller judges that K is less than 1, and the electromagnet of electric control reversing valve 43 obtains electric, feed apparatus is a position fuel feeding to flexible change-over valve 41 by this electric control reversing valve 43, the C of flexible change-over valve 41, D mouth oil pump capacity strengthen, and flow to the oil mass increasing that controllable capacity pump 3 is controlled mouth, and the oil outlet flow of control variable pump 3 increases, and then the overhang of telescopic oil cylinder 1 is strengthened, suspender is got back on A-B line; When suspender is outside A-B, controller judges that K is greater than 1, the electromagnet of electric control reversing valve 45 obtains electric, feed apparatus is a position fuel feeding to pitching change-over valve by this electric control reversing valve 45, and the C of pitching change-over valve, D mouth oil pump capacity strengthen, and flows to the oil mass increasing that controllable capacity pump 3 is controlled mouth, the oil outlet flow of control variable pump 3 increases, and then the width amount that rises of pitching oil cylinder 2 is strengthened, and suspender is got back on A-B line, realize vertical uplift.
2, as shown in Figure 2 and Figure 4, the present invention is in decline process, and the P mouth of flexible change-over valve 41 is connected with T2 with B mouth, C mouth, and the P mouth of pitching change-over valve is connected with T2 with B mouth, C mouth, and jib carries out vertical undercarriage, and suspender is from B-A operation.Meanwhile, the real-time observing and controlling suspender state of monitor 5, when suspender is inside B-A, controller judges that K is less than 1, the electromagnet of electric control reversing valve 46 obtains electric, and feed apparatus is the b position fuel feeding to pitching change-over valve by this electric control reversing valve 46, and the B mouth oil pump capacity of pitching change-over valve strengthens, and then the width amount that falls of pitching change-over valve is strengthened, suspender is got back on B-A line; When suspender is outside B-A, controller judges that K is greater than 1, the electromagnet of electric control reversing valve 44 obtains electric, feed apparatus is the b position fuel feeding to flexible change-over valve 41 by this electric control reversing valve 44, the B mouth oil pump capacity of flexible change-over valve 41 strengthens, and then the retraction amount of telescopic oil cylinder 1 is strengthened, and suspender is got back on A-B line, realize vertically and declining.
Claims (4)
1. a jib vertical lift control system, comprise some telescopic oil cylinders (1), some pitching oil cylinders (2), controller, fuel tank and feed apparatus, it is characterized in that: also comprise a controllable capacity pump (3), interstage valve group (4) and monitor (5), described interstage valve group comprises the flexible change-over valve (41) of three seven logical hydraulic controls, pitching change-over valve and four electric control reversing valves (43 of three seven logical hydraulic controls, 44, 45, 46), the oil suction of described controllable capacity pump (3) is connected with fuel tank, the oil outlet of this controllable capacity pump (3) is connected with the P mouth of flexible change-over valve (41) or the P mouth of pitching change-over valve respectively, the A of described flexible change-over valve (41), the A of D mouth and pitching change-over valve, D mouth is connected with the control mouth of controllable capacity pump (3) by check valve respectively, the rod chamber of the B mouth of described flexible change-over valve (41) and telescopic oil cylinder (1), the C mouth of the rodless cavity of telescopic oil cylinder (1) and flexible change-over valve (41), the rod chamber of the B mouth of pitching change-over valve and pitching oil cylinder (2), the rodless cavity of pitching oil cylinder (2) is connected respectively with the C mouth of pitching change-over valve, each T1 of described flexible change-over valve (41) and pitching change-over valve, T2 mouth is all connected with fuel tank, each control chamber of described flexible change-over valve (41) and pitching change-over valve is connected with fuel tank or feed apparatus by the electric control reversing valve of a correspondence respectively, described monitor (5) is arranged on the extension bar of telescopic oil cylinder (1) for monitoring the real time position of jib and sending feedback signal to controller, the electromagnet that described controller is controlled each electric control reversing valve obtains electric or dead electricity.
2. jib vertical lift control system according to claim 1, it is characterized in that: also comprise some unloader valves (6), between the B mouth of described flexible change-over valve (41) and the rod chamber of telescopic oil cylinder (1), between the rodless cavity of telescopic oil cylinder (1) and the C mouth of flexible change-over valve (41), be connected with fuel tank by unloader valve described in (6) respectively between the rodless cavity of pitching oil cylinder (2) and the C mouth of pitching change-over valve.
3. jib vertical lift control system according to claim 1 and 2, is characterized in that: the outgate of each T1 of described flexible change-over valve (41) and pitching change-over valve, T2 mouth, each unloader valve (6) all passes through a by pass valve (7) and is connected with the control mouth of controllable capacity pump (3).
4. jib vertical lift control system according to claim 1 and 2, is characterized in that: the oil outlet of described controllable capacity pump (3) is connected with the P mouth of flexible change-over valve (41) or the P mouth of pitching change-over valve respectively by a check valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310261991.4A CN103287980B (en) | 2013-06-27 | 2013-06-27 | Cantilever crane vertical lift control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310261991.4A CN103287980B (en) | 2013-06-27 | 2013-06-27 | Cantilever crane vertical lift control system |
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| Publication Number | Publication Date |
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| CN103287980A CN103287980A (en) | 2013-09-11 |
| CN103287980B true CN103287980B (en) | 2014-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310261991.4A Active CN103287980B (en) | 2013-06-27 | 2013-06-27 | Cantilever crane vertical lift control system |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105402176A (en) * | 2015-10-26 | 2016-03-16 | 徐州重型机械有限公司 | Parallel hydraulic control system and crane using parallel hydraulic control system |
| CN111675103B (en) * | 2020-06-17 | 2022-04-15 | 三一海洋重工有限公司 | Arm support pitching switching control method and control system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0015296A1 (en) * | 1978-07-13 | 1980-09-17 | Unic Corporation | Device for remote control of hydraulic cranes |
| CN2474763Y (en) * | 2001-04-28 | 2002-01-30 | 徐州重型机械厂 | Crane hydraulic device |
| CN2668907Y (en) * | 2003-12-05 | 2005-01-05 | 江苏省机电研究所有限公司 | Range control system for telescopic arm type high-altitude operation vehicle |
| CN1846068A (en) * | 2003-09-26 | 2006-10-11 | 三菱重工业株式会社 | Hydraulic control device of industrial machinery |
| CN102345749A (en) * | 2011-08-29 | 2012-02-08 | 徐州重型机械有限公司 | Flow collecting valve and crane hydraulic control system with the same |
| CN203411243U (en) * | 2013-06-27 | 2014-01-29 | 湖南中铁五新重工有限公司 | Vertical lifting control system for boom |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003146584A (en) * | 2001-11-14 | 2003-05-21 | Tadano Ltd | Control device for crane |
-
2013
- 2013-06-27 CN CN201310261991.4A patent/CN103287980B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0015296A1 (en) * | 1978-07-13 | 1980-09-17 | Unic Corporation | Device for remote control of hydraulic cranes |
| CN2474763Y (en) * | 2001-04-28 | 2002-01-30 | 徐州重型机械厂 | Crane hydraulic device |
| CN1846068A (en) * | 2003-09-26 | 2006-10-11 | 三菱重工业株式会社 | Hydraulic control device of industrial machinery |
| CN2668907Y (en) * | 2003-12-05 | 2005-01-05 | 江苏省机电研究所有限公司 | Range control system for telescopic arm type high-altitude operation vehicle |
| CN102345749A (en) * | 2011-08-29 | 2012-02-08 | 徐州重型机械有限公司 | Flow collecting valve and crane hydraulic control system with the same |
| CN203411243U (en) * | 2013-06-27 | 2014-01-29 | 湖南中铁五新重工有限公司 | Vertical lifting control system for boom |
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| CN103287980A (en) | 2013-09-11 |
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