CN202148156U - Hydraulic spring type rear tipping prevention device of luffing tower crane - Google Patents
Hydraulic spring type rear tipping prevention device of luffing tower crane Download PDFInfo
- Publication number
- CN202148156U CN202148156U CN201120271495U CN201120271495U CN202148156U CN 202148156 U CN202148156 U CN 202148156U CN 201120271495 U CN201120271495 U CN 201120271495U CN 201120271495 U CN201120271495 U CN 201120271495U CN 202148156 U CN202148156 U CN 202148156U
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- Prior art keywords
- valve
- solenoid directional
- swing arm
- tower crane
- directional control
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- Expired - Lifetime
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- 230000002265 prevention Effects 0.000 title abstract 6
- 239000004519 grease Substances 0.000 claims description 23
- 239000002828 fuel tank Substances 0.000 claims description 13
- 238000001514 detection method Methods 0.000 abstract 2
- 239000003921 oil Substances 0.000 description 48
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 208000002740 Muscle Rigidity Diseases 0.000 description 6
- 230000035939 shock Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000010720 hydraulic oil Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 241001133184 Colletotrichum agaves Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003042 antagnostic effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- Control And Safety Of Cranes (AREA)
Abstract
The utility model discloses a hydraulic spring type backward leaning prevention device of a luffing tower crane, comprising a first oil way and a second oil way, wherein the first oil way is connected with a rod cavity of a backward leaning prevention oil cylinder, and the second oil circuit is connected with a rodless cavity of the backward leaning prevention oil cylinder; a first branch, a second branch and a third branch are connected on the second oil way in parallel, wherein a check valve is arranged on the first branch, an overflow valve is arranged on the second branch, and a cartridge inserted valve and a solenoid directional valve for controlling the on and off of the third branch are arranged on the third branch; and the solenoid directional valve is electrically connected with a movable-arm backward leaning position detection switch. In the hydraulic spring type backward leaning prevention device of the luffing tower crane, as the cartridge inserted valve, which is controlled by the movable-arm backward leaning position detection device such as a travel switch and the like, is connected on an unloading branch of the overflow valve, the unloading of the backward leaning prevention device can be more flexible, thereby avoiding the rigid shocking problem of the crane boom.
Description
Technical field
The utility model relates to a kind of swing arm tower crane, relates in particular to the anti-squat system of swing arm tower crane.
Background technology
Existing ultra-large type swing arm tower crane generally adopts hydraulic spring grease cup formula anti-squat system, and the crane arm of swing arm tower crane is to be minimum radius when level from the level attitude luffing near vertical position; Be amplitude peak when vertical; To when vertical, because the influence of inertia loading and wind load, jib meeting hypsokinesis bumps against on the A type frame at the jib luffing; For fear of the danger of jib hypsokinesis, on A type frame, anti-squat system is set.
Fig. 1 shows the work scheme drawing of the hydraulic spring grease cup formula anti-squat system 100 of swing arm tower crane.Fig. 2 shows a kind of principle schematic of hydraulic control system of hydraulic spring grease cup formula anti-squat system 100 of tower crane swing arm.As depicted in figs. 1 and 2; When crane arm (being swing arm) 50 presses or is pressed on the strut 15 of anti-hypsokinesis oil cylinder 10, beginning compression spring 17, the hydraulic oil of the in-oil cylinder 250Par of having pressure works simultaneously; The setting pressure of check valve is 0.2bar, and the setting pressure of by pass valve is 250bar.
Because when contacting at the beginning; Spring and hydraulic pressure work simultaneously, and anti-squat system is big to the antagonistic force of crane arm, and above-mentioned hydraulic spring grease cup formula anti-squat system is little to the crane arm buffer action; Crane arm can produce violent impact swing, thereby has influenced the intensity and stability of crane arm.
The utility model content
The purpose of the utility model is to provide a kind of hydraulic spring grease cup formula anti-squat system of swing arm tower crane, makes crane arm in the hypsokinesis process, play buffer action, to reduce the rigid shock dancing.
For this reason, the utility model provides a kind of hydraulic spring grease cup formula anti-squat system of swing arm tower crane, comprises first oil circuit that links to each other with the rod chamber of anti-hypsokinesis oil cylinder and second oil circuit that links to each other with the rodless cavity of preventing the hypsokinesis oil cylinder; Wherein, Be parallel with first branch road, second branch road and the 3rd branch road on second oil circuit, wherein, first branch road is provided with check valve; Second branch road is provided with by pass valve; And the 3rd branch road be provided with inserted valve with control the 3rd branch road break-make solenoid directional control valve, wherein, solenoid directional control valve is electrically connected with swing arm reclined position detecting device.
Further, above-mentioned swing arm reclined position detector switch is the travel switch that is arranged on the retraction path of strut of anti-squat system.
Further, above-mentioned hydraulic spring grease cup formula anti-squat system also comprises fuel tank, fuel tank comprise with the second oil circuit bonded assembly quick joint and with the first oil circuit bonded assembly ball valve.
Further, above-mentioned solenoid directional control valve is the two-bit triplet solenoid directional control valve, and the oil outlet of inserted valve optionally is communicated with fuel tank through solenoid directional control valve or is communicated with the oil inlet of inserted valve through cutoff port.
Further, above-mentioned solenoid directional control valve is a solenoid directional control valve open in usual.
Further, above-mentioned by pass valve, inserted valve and solenoid directional control valve are arranged on the integral valve piece.
In the utility model, through inserted valve of parallel connection on the off-load branch road of by pass valve, make that the buffering of anti-squat system is flexible more by the control of swing arm reclined position detecting devices such as travel switch, avoid rigid shock to cause the problem of the violent swing of crane arm.
Except top described purpose, characteristic and advantage, other purpose, characteristic and the advantage that the utlity model has are with combining accompanying drawing to do further detailed explanation.
Description of drawings
Constitute the preferred embodiment that the part of this specification sheets, the accompanying drawing that is used for further understanding the utility model show the utility model, and be used for explaining the principle of the utility model with specification sheets.Among the figure:
Fig. 1 shows the work scheme drawing of the hydraulic spring grease cup formula anti-squat system of swing arm tower crane of the prior art;
Fig. 2 shows the principle schematic of hydraulic control system of the hydraulic spring grease cup formula anti-squat system of tower crane swing arm of the prior art; And
Fig. 3 shows the principle schematic according to the hydraulic control system of the hydraulic spring grease cup formula anti-squat system of the tower crane swing arm of the utility model.
The specific embodiment
Embodiment to the utility model is elaborated below in conjunction with accompanying drawing, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
Fig. 3 shows the principle schematic according to the hydraulic control system of the hydraulic spring grease cup formula anti-squat system of the tower crane swing arm of the utility model.As shown in Figure 3; Hydraulic spring grease cup formula anti-squat system 100 comprises first oil circuit 20 that links to each other with the rod chamber 11 of anti-hypsokinesis oil cylinder 10 and second oil circuit 30 that links to each other with the rodless cavity 13 of anti-hypsokinesis oil cylinder 10, wherein, is parallel with first branch road 31, second branch road 33 and the 3rd branch road 35 on second oil circuit 30; Wherein, First branch road 31 is provided with check valve 32, the second branch roads 33 and is provided with the solenoid directional control valve 37 that by pass valve 34, the three branch roads 35 are provided with inserted valve 36 and control the 3rd branch road 35 break-makes; Wherein, solenoid directional control valve 37 is electrically connected with swing arm reclined position detecting device 39.
Preferably, swing arm reclined position detecting device 39 is the travel switch on the retraction path of the strut that is arranged on anti-squat system.Travel switch is a touch sensor, certainly, in the utility model, also can adopt noncontacting proximity sensor, for example opto-electronic pickup.
Preferably, a fuel tank independently is set, to anti-hypsokinesis oil cylinder 10 fuel feeding.Particularly, quick joint 41 is set on fuel tank is connected to quick joint 41, the first oil circuits 20 with ball valve 43, the second oil circuits 30 and is connected to ball valve 43, regulate the aperture of ball valve 43, the may command speed of oil absorption.
Preferably, above-mentioned solenoid directional control valve 37 is a solenoid directional control valve open in usual, promptly not when electric, the 3rd branch road is communicated with, when when electric, the 3rd branch road breaks off.More preferably be the two-bit triplet solenoid directional control valve, the oil outlet of inserted valve 36 is selected a ground through solenoid directional control valve 37 and is communicated with fuel tank 40, or is communicated with the oil circuit of oil inlet one side of inserted valve 36 through cutoff port 38.Wherein, cutoff port 38 forms the oil resistance, has played the problem of the pressure of oil outlet one side that prevents inserted valve 36 greater than the pressure of oil inlet one side of inserted valve 36.
Preferably, above-mentioned by pass valve 34 forms an integral valve piece with inserted valve 36 and solenoid directional control valve 37.Have oil inlet A and oil outlet B, check valve 31 is connected to oil inlet A and oil outlet B gets final product, and mounting means is simple and reliable.
Below in conjunction with Fig. 1 and Fig. 3 the working process of the hydraulic spring grease cup formula anti-squat system of the utility model is described.
The principle of work of above-mentioned anti-hypsokinesis oil cylinder 10 is following: when crane arm (being swing arm) 50 presses or is pressed on the strut 15 of anti-hypsokinesis oil cylinder 10, and beginning compression spring 17; When compression spring 17 arrived certain position, the triggering travel switch made solenoid directional control valve 37 change position, a left side indication inserted valve and cuts out; When hydraulic fluid pressure reaches by pass valve 34 and preestablishes pressure, just unload stream through by pass valve 34.When hoisting crane left the strut 15 of anti-hypsokinesis oil cylinder 10, spring discharged, and under the pulling of strut, anti-hypsokinesis oil cylinder is via check valve 32 oil suction from fuel tank 40.
When crane arm 50 (being swing arm) contacted with the strut 15 of anti-hypsokinesis oil cylinder 10, this moment, crane arm was in the α angle, and crane arm continuation luffing to β angle (β>α); In this section process, strut 15 beginning compression springs, 10 of anti-squat system need spring to play shock damping action; Do not need oil cylinder to play shock damping action, need the rapid oil extraction of oil cylinder, therefore utilize the big characteristics oil extraction of through-current capability of inserted valve; When length of spring compressed to β angle, trigger travel switch, make the electromagnetic valve displacement; The control inserted valve is closed, and at this moment, only plays the off-load effect by by pass valve.
Above-mentioned hydraulic circuit off-load step is following: 1, in crane arm and process that the strut of anti-squat system contacts, in the time of between the angle of crane arm is less than the β angle, inserted valve is in normally open, and anti-hypsokinesis oil cylinder is through the inserted valve off-load; 2, when length of spring compressed to β angle, trigger travel switch, make the electromagnetic valve switching-over; The control inserted valve is closed, when oil pressure reaches by pass valve and preestablishes pressure, just through the by pass valve overflow; At this moment, only play the off-load effect by by pass valve, flexible braking crane arm pitching luffing.
The hydraulic control system of the hydraulic spring grease cup formula anti-squat system of the utility model makes that rigid shock obviously reduces between crane arm and the anti-squat system, rather than has just begun contact just by the by pass valve off-load, impacts bigger.
The hydraulic control system features simple structure of the hydraulic spring grease cup formula anti-squat system of the utility model adopts the relief circuit of inserted valve control, operates easylier, and working stability is avoided the influence of rigid shock to crane arm, thereby has improved the safety performance of tower machine.
The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Description of reference numerals
100 hydraulic spring grease cup formula anti-squat system, 10 anti-hypsokinesis oil cylinders
11 rod chambers, 13 rodless cavities
15 struts, 17 springs
20 first oil circuits, 50 crane arms
30 second oil circuits, 31 first branch roads
33 second branch roads 35 the 3rd branch road
32 check valves, 34 by pass valves
36 inserted valves, 37 solenoid directional control valves
38 flow regulating valve, 39 swing arm reclined position detecting devices
40 fuel tanks, 41 quick joints
43 ball valves.
Claims (6)
1. the hydraulic spring grease cup formula anti-squat system of a swing arm tower crane comprises first oil circuit that links to each other with the rod chamber of anti-hypsokinesis oil cylinder and second oil circuit that links to each other with the rodless cavity of said anti-hypsokinesis oil cylinder, it is characterized in that,
Be parallel with first branch road, second branch road and the 3rd branch road on said second oil circuit; Wherein, Said first branch road is provided with check valve, and said second branch road is provided with by pass valve, and said the 3rd branch road is provided with the solenoid directional control valve of inserted valve and said the 3rd branch road break-make of control; Wherein, said solenoid directional control valve is electrically connected with swing arm reclined position detecting device.
2. the hydraulic spring grease cup formula anti-squat system of swing arm tower crane according to claim 1 is characterized in that, said swing arm reclined position detecting device is the travel switch that is arranged on the retraction path of strut of said anti-squat system.
3. the hydraulic spring grease cup formula anti-squat system of swing arm tower crane according to claim 1 is characterized in that, also comprises fuel tank, said fuel tank comprise with the said second oil circuit bonded assembly quick joint and with the said first oil circuit bonded assembly ball valve.
4. the hydraulic spring grease cup formula anti-squat system of swing arm tower crane according to claim 3; It is characterized in that; Said solenoid directional control valve is the two-bit triplet solenoid directional control valve, and the oil outlet of said inserted valve optionally is communicated with said fuel tank through said solenoid directional control valve or is communicated with the oil inlet of said inserted valve through cutoff port.
5. the hydraulic spring grease cup formula anti-squat system of swing arm tower crane according to claim 1 is characterized in that said solenoid directional control valve is a solenoid directional control valve open in usual.
6. the hydraulic spring grease cup formula anti-squat system of swing arm tower crane according to claim 1 is characterized in that said by pass valve, said inserted valve and said solenoid directional control valve are arranged on the integral valve piece.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201120271495U CN202148156U (en) | 2011-07-28 | 2011-07-28 | Hydraulic spring type rear tipping prevention device of luffing tower crane |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN201120271495U CN202148156U (en) | 2011-07-28 | 2011-07-28 | Hydraulic spring type rear tipping prevention device of luffing tower crane |
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CN202148156U true CN202148156U (en) | 2012-02-22 |
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CN201120271495U Expired - Lifetime CN202148156U (en) | 2011-07-28 | 2011-07-28 | Hydraulic spring type rear tipping prevention device of luffing tower crane |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102635106A (en) * | 2012-04-27 | 2012-08-15 | 中国一冶集团有限公司 | Dynamic compaction buffer damping method of crawler crane |
CN103350964A (en) * | 2013-07-23 | 2013-10-16 | 中联重科股份有限公司 | Anti-back-tilting hydraulic control system of arm support and tower crane |
CN103469785A (en) * | 2013-09-26 | 2013-12-25 | 徐工集团工程机械股份有限公司 | Anti-backward inclination control device of dynamic compactor |
CN104033450A (en) * | 2014-05-28 | 2014-09-10 | 广西柳工机械股份有限公司 | Hydraulic control unloading valve |
-
2011
- 2011-07-28 CN CN201120271495U patent/CN202148156U/en not_active Expired - Lifetime
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102635106A (en) * | 2012-04-27 | 2012-08-15 | 中国一冶集团有限公司 | Dynamic compaction buffer damping method of crawler crane |
CN102635106B (en) * | 2012-04-27 | 2015-05-20 | 中国一冶集团有限公司 | Dynamic compaction buffer damping method of crawler crane |
CN103350964A (en) * | 2013-07-23 | 2013-10-16 | 中联重科股份有限公司 | Anti-back-tilting hydraulic control system of arm support and tower crane |
CN103469785A (en) * | 2013-09-26 | 2013-12-25 | 徐工集团工程机械股份有限公司 | Anti-backward inclination control device of dynamic compactor |
CN103469785B (en) * | 2013-09-26 | 2015-12-16 | 徐工集团工程机械股份有限公司 | Anti-backward inclination control device of dynamic compactor |
CN104033450A (en) * | 2014-05-28 | 2014-09-10 | 广西柳工机械股份有限公司 | Hydraulic control unloading valve |
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Legal Events
Date | Code | Title | Description |
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C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C56 | Change in the name or address of the patentee | ||
CP01 | Change in the name or title of a patent holder |
Address after: 410013 Yuelu District, Hunan, silver basin Road, No. 361, No. Patentee after: ZOOMLION HEAVY INDUSTRY SCIENCE&TECHNOLOGY Co.,Ltd. Address before: 410013 Yuelu District, Hunan, silver basin Road, No. 361, No. Patentee before: CHANGSHA ZOOMLION HEAVY INDUSTRY SCIENCE AND TECHNOLOGY DEVELOPMENT Co.,Ltd. |
|
CX01 | Expiry of patent term |
Granted publication date: 20120222 |
|
CX01 | Expiry of patent term |