CN102705275B - Hydraulic control system for bolt and engineering machinery - Google Patents
Hydraulic control system for bolt and engineering machinery Download PDFInfo
- Publication number
- CN102705275B CN102705275B CN201210210419.0A CN201210210419A CN102705275B CN 102705275 B CN102705275 B CN 102705275B CN 201210210419 A CN201210210419 A CN 201210210419A CN 102705275 B CN102705275 B CN 102705275B
- Authority
- CN
- China
- Prior art keywords
- selector valve
- accumulator
- cylinder
- oil cylinder
- pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Fluid-Pressure Circuits (AREA)
- Actuator (AREA)
Abstract
The invention provides a hydraulic control system for a bolt. The hydraulic control system is used for controlling plugging/unplugging of the bolt in a telescopic cantilever crane. The telescopic cantilever crane comprises a telescopic boom and a telescopic cylinder; and the hydraulic control system comprises a first energy accumulator, a first one-way valve, a second one-way valve, a bolt driving cylinder and a bolt reversing valve, wherein the first energy accumulator is connected to a rod cavity and a rodless cavity of the telescopic cylinder through the first one-way valve and the second one-way valve; the telescopic cylinder can pressurize the first energy accumulator during acting; and the bolt reversing valve is arranged on an oil way between the bolt driving cylinder and the first energy accumulator and is used for controlling the bolt driving cylinder to reverse so as to control the plugging/unplugging of the bolt. The invention also provides engineering machinery. By the hydraulic control system, the structure of the cylinder can be simplified, the cost is reduced, and the reliability is high.
Description
Technical field
The present invention relates to technical field of hydraulic, in particular to a kind of hydraulic control system and a kind of engineering machinery of latch.
Background technique
The latch hydraulic control system of truck crane is mainly as follows both at home and abroad at present: in telescopic oil cylinder, arrange oil cylinder core tube, as the power source of single-cylinder bolt cylinder control system, control plugging pin oil cylinder pushing piston-rod or retraction piston rod by hydraulic oil after selector valve work, to be retracted described piston rod or release described piston rod by spring after selector valve resets.
Adopt current latch hydraulic control system, there is following shortcoming:
1) on telescopic oil cylinder, arrange core pipe, cylinder structure is complicated, and cost is high, and core length of tube is long, easy flexible deformation and being washed out by high pressure;
2) plugging pin oil cylinder uses spring reset, easily loses efficacy.
Summary of the invention
Technical problem to be solved by this invention is, provide a kind of new latch hydraulic control system, can simplify cylinder structure, reduce costs, reliability is high.
In view of this, the invention provides a kind of hydraulic control system of latch, for controlling the plug of latch in telescopic arm support, described telescopic arm support comprises telescopic boom and telescopic oil cylinder, described hydraulic control system comprises the first accumulator, the first one-way valve, the second one-way valve, bolt driving oil cylinder and latch selector valve, wherein: described first accumulator is connected to rod chamber and the rodless cavity of described telescopic oil cylinder by described first one-way valve and described second one-way valve, during described telescopic oil cylinder action can be described first accumulator pressurizing; Described latch selector valve is arranged on the oil circuit between described bolt driving oil cylinder and described first accumulator, for controlling the commutation of described bolt driving oil cylinder, to control the plug of described latch.
In this technological scheme, eliminate the setting of oil cylinder inner core tube, simplify the structure of oil cylinder, reduce cost, and the action oil sources of latch takes from rod chamber and the rodless cavity pressure oil-source of telescopic oil cylinder, control simple, reliability is high.
Preferably, described latch comprises the cylinder pin of described telescopic oil cylinder and the arm pin of described telescopic boom, described latch selector valve comprises cylinder pin selector valve and arm pin selector valve, wherein: described cylinder pin selector valve is arranged on the oil circuit between cylinder pin driving oil cylinder and described first accumulator, oil cylinder commutation is driven, to control the plug of described cylinder pin for controlling described cylinder pin; Described arm pin selector valve is arranged on the oil circuit between described arm pin driving oil cylinder and described first accumulator, drives oil cylinder commutation, to control the plug of described arm pin for controlling described arm pin.In this technological scheme, drive oil cylinder to be arranged in parallel cylinder pin and arm pin, principle is simple, achieves the object that employing control system controls arm pin and cylinder pin.
Preferably, the oil circuit between described first accumulator and described latch selector valve is also provided with the first selector valve, for the through and off of this oil circuit.In this technological scheme, by arranging the main switch that the first selector valve can plug as cylinder pin and arm pin, also not having security risk when cylinder pin selector valve or arm pin selector valve break down, improve the reliability of control system.
Preferably, described first selector valve is two position three way directional control valve.
Preferably, described hydraulic control system also comprises the second accumulator, is connected to the return opening of described latch selector valve.In this technological scheme, with less, dynamic cylinder pin or arm pin are tried hard to recommend to punctual second accumulator that adopts the pin-and-hole of cylinder pin or arm pin is more difficult, realize oil cylinder or jib action while attempt alignment pin holes, improve efficiency.
Preferably, described hydraulic control system also comprises the second accumulator, the 3rd one-way valve and the 4th one-way valve, described second accumulator is connected to rod chamber and the rodless cavity of described telescopic oil cylinder respectively by described 3rd one-way valve and described 4th one-way valve, makes pressure oil in described second accumulator can in the described telescopic oil cylinder of unidirectional inflow.In this technological scheme, can be telescopic oil cylinder pressurize by the second accumulator, improve the reliability of system.
Preferably, described second accumulator is also connected to the return opening of described latch selector valve.
Preferably, described second accumulator is also connected to described first selector valve, described in when described first accumulator is communicated with described latch selector valve, the second accumulator and latch selector valve disconnect, and described in when described second accumulator is communicated with described latch selector valve, the first accumulator and latch selector valve disconnect.
In this technological scheme, first selector valve can be delivered in the second accumulator to the high pressure oil in the oil circuit a of latch selector valve when latch is failure to actuate, reduce the oil pressure in oil circuit a, the potential safety hazard avoiding in oil circuit a high pressure all the time to cause, improves the reliability of system.
Preferably, described hydraulic control system also comprises: the first relief valve, is arranged on the oil circuit between the rodless cavity of described telescopic oil cylinder and described fuel tank; Second relief valve, is arranged on the oil circuit between the rod chamber of described telescopic oil cylinder and described fuel tank.In this technological scheme, the first relief valve and the second relief valve can avoid the rod chamber of telescopic oil cylinder or rodless cavity pressure excessive, improve the reliability of system.
Preferably, described hydraulic control system also comprises: the first hydraulic lock, is arranged on the oil circuit between described cylinder pin driving oil cylinder and described cylinder pin selector valve; And/or the second hydraulic lock, is arranged on the oil circuit between described arm pin driving oil cylinder and described arm pin selector valve.In this technological scheme, adopt hydraulic lock can maintain remaining static of cylinder pin and arm pin when cylinder pin and arm pin do not use.
Present invention also offers a kind of engineering machinery, comprise the hydraulic control system according to any one of technique scheme.Such as, engineering machinery can be hoist, and telescopic arm support is the shear leg of hoist, and hoist also comprises pressure oil-source and the second selector valve, and the second selector valve is arranged on the oil circuit between pressure oil-source and telescopic oil cylinder, for controlling the flexible of telescopic oil cylinder.
Preferably, described hoist also comprises equilibrium valve, is arranged on the oil circuit between described second selector valve and described telescopic oil cylinder.In this technological scheme, equilibrium valve can maintain remaining static of telescopic oil cylinder when telescopic oil cylinder does not work.
In sum, by the present invention, eliminate core pipe, simplify the structure of telescopic oil cylinder, reduce cost; Eliminate the Returnning spring of cylinder pin, arm pin, structure is simple, and failure rate is low, improves the reliability of system; Adopt the rod chamber of telescopic oil cylinder and rodless cavity pressure oil-source as the action oil sources of cylinder pin and arm pin, control simple.
Accompanying drawing explanation
Fig. 1 is the hydraulic control system schematic diagram according to the embodiment of the present invention.
Wherein, the corresponding relation in Fig. 1 between reference character and component names is:
1 telescopic oil cylinder, 2 first accumulators, 3 first one-way valves, 4 second one-way valves,
5 latch selector valves, 6 bolt driving oil cylinders, 7 the 3rd one-way valves, 8 first selector valves,
10 the 4th one-way valves, 11 second accumulators, 13 second selector valves, 14 fuel tanks,
15 first relief valves, 16 second relief valves, 17 equilibrium valves,
51 cylinder pin selector valves, 52 arm pin selector valves, 61 cylinder pins drive oil cylinder,
62 arm pins drive oil cylinder, 91 first hydraulic lock, 92 second hydraulic lock.
Embodiment
In order to more clearly understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.
Set forth a lot of detail in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention is not by the restriction of following public specific embodiment.
Below in conjunction with drawings and Examples, the present invention will be further described.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
Fig. 1 is the hydraulic control system schematic diagram according to the embodiment of the present invention.
As shown in Figure 1, the hydraulic control system of the latch in the present embodiment, for controlling the plug of latch in telescopic arm support, telescopic arm support comprises telescopic boom and telescopic oil cylinder 1, described hydraulic control system comprises the first accumulator 2, first one-way valve 3, second one-way valve 4, bolt driving oil cylinder 6 and latch selector valve 5, wherein: the first accumulator 2 is connected to rod chamber and the rodless cavity of telescopic oil cylinder 1 by the first one-way valve 3 and the second one-way valve 4, can be the first accumulator 2 pressurising during telescopic oil cylinder 1 action; Latch selector valve 5 is arranged on the oil circuit between bolt driving oil cylinder 6 and the first accumulator 2, commutates, to control the plug of latch for controlling bolt driving oil cylinder 6.
Wherein, latch can be cylinder pin, arm pin etc.
In this technological scheme, eliminate the setting of oil cylinder inner core tube, simplify the structure of oil cylinder, reduce cost, and the action oil sources of latch takes from rod chamber and the rodless cavity pressure oil-source of telescopic oil cylinder 1, control simple, reliability is high.
In a kind of embodiment, latch comprises the cylinder pin of telescopic oil cylinder 1 and the arm pin of telescopic boom, latch selector valve 5 comprises cylinder pin selector valve 51 and arm pin selector valve 52, wherein: cylinder pin selector valve 51 is arranged on the oil circuit between cylinder pin driving oil cylinder 61 and the first accumulator 2, oil cylinder 61 is driven to commutate, with the plug of control cylinder pin for control cylinder pin; Arm pin selector valve 52 is arranged on the oil circuit between arm pin driving oil cylinder 62 and the first accumulator 2, drives oil cylinder 62 to commutate, with the plug of control arm pin for control arm pin.
In this technological scheme, drive oil cylinder to be arranged in parallel cylinder pin and arm pin, principle is simple, achieves the object that employing control system controls arm pin and cylinder pin.
Further, the oil circuit between the first accumulator 2 and latch selector valve 5 is also provided with the first selector valve 8, for the through and off of this oil circuit.Wherein, the first selector valve 8 can be two position three way directional control valve, and adopt two-bit triplet selector valve can realize the function of this selector valve, structure is the simplest.
In this technological scheme, by arranging the main switch that the first selector valve 8 can plug as cylinder pin and arm pin, also not having security risk when cylinder pin selector valve 51 or arm pin selector valve 52 break down, improve the reliability of control system.
Further again, described hydraulic control system also comprises the second accumulator 11, is connected to the return opening of latch selector valve 5.In this technological scheme, with less, dynamic cylinder pin or arm pin are tried hard to recommend to punctual second accumulator 7 that adopts the pin-and-hole of cylinder pin or arm pin is more difficult, realize oil cylinder or jib action while attempt alignment pin holes, improve efficiency.
In addition, described hydraulic control system also comprises can the 3rd one-way valve 7 and the 4th one-way valve 10, second accumulator is connected to rod chamber and the rodless cavity of telescopic oil cylinder 1 respectively by the 3rd one-way valve 7 and the 4th one-way valve 10, makes the pressure oil in the second accumulator 11 can in unidirectional inflow telescopic oil cylinder 1.In this technological scheme, can be telescopic oil cylinder 1 pressurize by the second accumulator 11, improve the reliability of system.
Second accumulator 11 also can also be connected to the first selector valve 8, such as adopt the Placement shown in figure, when the first accumulator 2 is communicated with latch selector valve 5, the second accumulator 1 disconnects with latch selector valve 5, and when the second accumulator 11 is communicated with latch selector valve 5, the first accumulator 2 disconnects with latch selector valve 5.In this technological scheme, first selector valve to the high pressure oil in the oil circuit a of latch selector valve 6 can be delivered in the second accumulator 7 when latch is failure to actuate, reduce the oil pressure in oil circuit a, the potential safety hazard avoiding in oil circuit a high pressure all the time to cause, improves the reliability of system.
Preferably, described hydraulic control system also comprises: the first relief valve 15, is arranged on the oil circuit between the rodless cavity of telescopic oil cylinder 1 and fuel tank 14; Second relief valve 16, is arranged on the oil circuit between the rod chamber of telescopic oil cylinder 1 and fuel tank 14.In this technological scheme, the first relief valve 15 and the second relief valve 16 can avoid the rod chamber of telescopic oil cylinder 1 or rodless cavity pressure excessive, improve the reliability of system.
Particularly, described hydraulic control system also comprises: the first hydraulic lock 91, is arranged on the oil circuit between cylinder pin driving oil cylinder 61 and cylinder pin selector valve 51; And/or the second hydraulic lock 92, is arranged on the oil circuit between arm pin driving oil cylinder 62 and arm pin selector valve 52.In this technological scheme, adopt hydraulic lock can maintain remaining static of cylinder pin and arm pin when cylinder pin and arm pin do not use.
In a kind of embodiment, each selector valve is solenoid directional control valve.Adopt solenoid directional control valve, control simple, be easy to realize automatic control.
Present invention also offers a kind of engineering machinery, comprise the hydraulic control system according to any one of technique scheme.Such as, engineering machinery can be hoist, and telescopic arm support is the shear leg of hoist, and hoist also comprises pressure oil-source and the second selector valve 13, second selector valve 13 is arranged on the oil circuit between pressure oil-source and telescopic oil cylinder 1, for controlling the flexible of telescopic oil cylinder 1.
Further, hoist also comprises equilibrium valve 17, is arranged on the oil circuit between the second selector valve 13 and telescopic oil cylinder 1.In this technological scheme, equilibrium valve 13 can maintain remaining static of telescopic oil cylinder 1 when telescopic oil cylinder 1 does not work.
As a kind of preferred implementation, the second selector valve 13 is Hydraulic guide control valve, adopts Hydraulic guide control valve, and flow is larger, can bear larger pressure, enable the telescopic boom of hoist adapt to more heavy weight operating mode.
Based on technique scheme, in the present invention, the principle of hydraulic control system is as follows:
Pass through the present invention, telescopic oil cylinder 1 can cancel oil cylinder inner core tube, pressure source when being plugged respectively as cylinder arm pin by the first accumulator 2 and the second accumulator 11 and oil return cavity volume, when telescopic boom action, by the pressure of hyperbaric chamber to high pressure accumulator 2 pressurising, simultaneously because low-pressure cavity is directly communicated with oil return, to the second accumulator 11 release;
Plugging pin oil cylinder spring can also be cancelled, when needs carry out the plug of cylinder arm pin, controlled by selector valve, the pressure utilizing the first accumulator 2 to provide carries out action, oil return simultaneously enters the second accumulator 11, when telescopic oil cylinder 1 again action time, the first accumulator 2 is by pressurising again, and the second accumulator 11 release completes a work cycle;
When telescopic oil cylinder is failure to actuate for a long time, the easily release of the first accumulator 2, now as needed directly to carry out the plug of cylinder arm pin, can before plugging action telescopic oil cylinder 1 once a little, again pressure is built to high pressure accumulator 2.
During control system work, the plugging condition obtaining electric situation and cylinder pin and arm pin of each selector valve is as shown in table 1:
| DT1 | DT2 | DT4 | DT5 | DT6 | DT7 | DT8 | |
| Insert cylinder pin | - | - | - | - | - | + | + |
| Pull out cylinder pin | - | - | - | - | + | - | + |
| Arms pin | - | - | - | + | - | - | + |
| Pull out arm pin | - | - | + | - | - | - | + |
| Semi-girder | + | - | - | - | - | - | - |
| Contracting arm | - | + | - | - | - | - | - |
Table 1
Particularly, for the plug of cylinder pin:
When DT1 or DT2 obtains electric, there is action in telescopic oil cylinder 1, and can be the first accumulator 2 pressurising, now DT8 dead electricity all the time, namely cylinder pin and arm pin be all failure to actuate simultaneously;
When the slotting cylinder pin of needs, DT7 and DT8 obtains electric as shown in Table 1, and cylinder pin selector valve 51 commutates, and high pressure oil is sent into cylinder pin and driven in the rodless cavity of oil cylinder 61 by the first accumulator 1, realizes latch action;
When needs pull out cylinder pin, DT6 and DT8 obtains electric as shown in Table 1, and cylinder pin selector valve 51 commutates, and high pressure oil is sent into cylinder pin and driven in the rod chamber of oil cylinder 61 by the first accumulator 1, realizes pulling pin action;
DT3 ~ DT8 all must not electricity time, cylinder pin drives oil cylinder and arm pin to drive oil cylinder to be all communicated with the second accumulator 11, it is more difficult to adopting the second accumulator 7 to try hard to recommend dynamic cylinder pin or arm pin with less on time to realize at the pin-and-hole of cylinder pin or arm pin, realize the action on one side of oil cylinder or jib while attempt alignment pin holes, improve efficiency.
The plug of arm pin is identical with cylinder pin principle, repeats no more.
In sum, by the present invention, eliminate core pipe, simplify the structure of telescopic oil cylinder, reduce cost; Eliminate the Returnning spring of cylinder pin, arm pin, structure is simple, and failure rate is low, improves the reliability of system; Adopt the rod chamber of telescopic oil cylinder and rodless cavity pressure oil-source as the action oil sources of cylinder pin and arm pin, control simple.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. the hydraulic control system of a latch, for controlling the plug of latch in telescopic arm support, described telescopic arm support comprises telescopic boom and telescopic oil cylinder (1), it is characterized in that, described hydraulic control system comprises the first accumulator (2), the first one-way valve (3), the second one-way valve (4), bolt driving oil cylinder (6) and latch selector valve (5), wherein:
Described first accumulator (2) is connected to rod chamber and the rodless cavity of described telescopic oil cylinder (1) by described first one-way valve (3) and described second one-way valve (4), can be the pressurising of described first accumulator (2) during described telescopic oil cylinder (1) action;
Described latch selector valve (5) is arranged on the oil circuit between described bolt driving oil cylinder (6) and described first accumulator (2), for controlling the commutation of described bolt driving oil cylinder (6), to control the plug of described latch.
2. hydraulic control system according to claim 1, it is characterized in that, described latch comprises the cylinder pin of described telescopic oil cylinder (1) and the arm pin of described telescopic boom, described latch selector valve (5) comprises cylinder pin selector valve (51) and arm pin selector valve (52), wherein:
Described cylinder pin selector valve (51) is arranged on the oil circuit between cylinder pin driving oil cylinder (61) and described first accumulator (2), oil cylinder (61) commutation is driven, to control the plug of described cylinder pin for controlling described cylinder pin;
Described arm pin selector valve (52) is arranged on the oil circuit between arm pin driving oil cylinder (62) and described first accumulator (2), oil cylinder (62) commutation is driven, to control the plug of described arm pin for controlling described arm pin.
3. hydraulic control system according to claim 1 and 2, it is characterized in that, oil circuit between described first accumulator (2) and described latch selector valve (5) is also provided with the first selector valve (8), for the through and off of this oil circuit.
4. hydraulic control system according to claim 3, is characterized in that, described first selector valve (8) is two position three way directional control valve.
5. hydraulic control system according to claim 3, is characterized in that, also comprises the second accumulator (11), is connected to the return opening of described latch selector valve (5).
6. hydraulic control system according to claim 3, it is characterized in that, also comprise the second accumulator (11), the 3rd one-way valve (7) and the 4th one-way valve (10), described second accumulator is connected to rod chamber and the rodless cavity of described telescopic oil cylinder (1) respectively by described 3rd one-way valve (7) and described 4th one-way valve (10), makes pressure oil in described second accumulator (11) can in the described telescopic oil cylinder of unidirectional inflow (1).
7. hydraulic control system according to claim 6, is characterized in that, described second accumulator (11) is also connected to the return opening of described latch selector valve (5).
8. the hydraulic control system according to claim 5 or 7, it is characterized in that, described second accumulator (11) is also connected to described first selector valve (8), second accumulator (11) described in when described first accumulator (2) is communicated with described latch selector valve (5) and latch selector valve (5) disconnect, and the first accumulator (2) described in when described second accumulator (11) is communicated with described latch selector valve (5) and latch selector valve (5) disconnect.
9. hydraulic control system according to claim 1 and 2, is characterized in that, also comprises:
First relief valve (15), is arranged on the oil circuit between the rodless cavity of described telescopic oil cylinder (1) and fuel tank (14);
Second relief valve (16), is arranged on the oil circuit between the rod chamber of described telescopic oil cylinder (1) and described fuel tank (14).
10. hydraulic control system according to claim 2, is characterized in that, also comprises:
First hydraulic lock (91), is arranged on the oil circuit between described cylinder pin driving oil cylinder (61) and described cylinder pin selector valve (51); And/or,
Second hydraulic lock (92), is arranged on the oil circuit between described arm pin driving oil cylinder (62) and described arm pin selector valve (52).
11. 1 kinds of engineering machinery, is characterized in that, comprise the hydraulic control system of telescopic arm support and the latch according to any one of claim 1 to 10.
12. engineering machinery according to claim 11, it is characterized in that, described engineering machinery is hoist, described telescopic arm support is the shear leg of described hoist, described hoist also comprises pressure oil-source and the second selector valve (13), described second selector valve (13) is arranged on the oil circuit between described pressure oil-source and described telescopic oil cylinder (1), for controlling the flexible of described telescopic oil cylinder (1).
13. engineering machinery according to claim 12, is characterized in that, also comprise equilibrium valve (17), are arranged on the oil circuit between described second selector valve (13) and described telescopic oil cylinder (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210210419.0A CN102705275B (en) | 2012-06-25 | 2012-06-25 | Hydraulic control system for bolt and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210210419.0A CN102705275B (en) | 2012-06-25 | 2012-06-25 | Hydraulic control system for bolt and engineering machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102705275A CN102705275A (en) | 2012-10-03 |
| CN102705275B true CN102705275B (en) | 2014-12-17 |
Family
ID=46898267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210210419.0A Active CN102705275B (en) | 2012-06-25 | 2012-06-25 | Hydraulic control system for bolt and engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102705275B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012021544B4 (en) * | 2012-10-29 | 2014-07-10 | Terex Cranes Germany Gmbh | Telescoping unit with additional function |
| CN103388598B (en) * | 2013-08-06 | 2015-12-02 | 中联重科股份有限公司 | Boom telescoping mechanism, hydraulic control system and control method thereof and crane |
| WO2016061797A1 (en) * | 2014-10-23 | 2016-04-28 | 南京迈瑞生物医疗电子有限公司 | Hydraulic drive system for operating table |
| CN104591012B (en) * | 2014-12-29 | 2017-02-08 | 三一汽车起重机械有限公司 | Hydraulic control system for single cylinder pin type telescopic boom and engineering machinery |
| CN106365055B (en) * | 2016-12-02 | 2018-04-17 | 徐州重型机械有限公司 | Bolt-type telescopic system and hoisting machinery |
| CN109268253B (en) * | 2018-12-01 | 2020-05-12 | 海安县石油科研仪器有限公司 | Reciprocating pump with variable pressure increasing ratio |
| CN111649022A (en) * | 2020-06-28 | 2020-09-11 | 河南卫华特种车辆有限公司 | Single-cylinder bolt control valve group, horizontal bar bolt control system and crane |
| CN114251314A (en) * | 2021-11-24 | 2022-03-29 | 徐州重型机械有限公司 | Crane hydraulic system and control method |
| CN115158577B (en) * | 2022-07-29 | 2023-06-23 | 武汉船用机械有限责任公司 | Telescopic rudder plate simulation loading device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2213042C1 (en) * | 2002-07-08 | 2003-09-27 | Открытое акционерное общество "Конструкторское бюро специального машиностроения" | Hydraulic drive of self-propelled boom crane |
| DE202008007903U1 (en) * | 2008-06-16 | 2010-02-11 | Kobelco Cranes Co., Ltd. | Locking device with cylinder actuation to the side |
| CN101723262A (en) * | 2008-10-15 | 2010-06-09 | 徐州重型机械有限公司 | Control system of telescopic boom bolt mechanism |
| CN102431900A (en) * | 2011-12-20 | 2012-05-02 | 中联重科股份有限公司 | Bolt mechanism control system and crane |
| CN102491198A (en) * | 2011-11-29 | 2012-06-13 | 三一汽车起重机械有限公司 | Single-cylinder bolt oil cylinder, and telescopic boom device and crane having single-cylinder bolt oil cylinder |
-
2012
- 2012-06-25 CN CN201210210419.0A patent/CN102705275B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2213042C1 (en) * | 2002-07-08 | 2003-09-27 | Открытое акционерное общество "Конструкторское бюро специального машиностроения" | Hydraulic drive of self-propelled boom crane |
| DE202008007903U1 (en) * | 2008-06-16 | 2010-02-11 | Kobelco Cranes Co., Ltd. | Locking device with cylinder actuation to the side |
| CN101723262A (en) * | 2008-10-15 | 2010-06-09 | 徐州重型机械有限公司 | Control system of telescopic boom bolt mechanism |
| CN102491198A (en) * | 2011-11-29 | 2012-06-13 | 三一汽车起重机械有限公司 | Single-cylinder bolt oil cylinder, and telescopic boom device and crane having single-cylinder bolt oil cylinder |
| CN102431900A (en) * | 2011-12-20 | 2012-05-02 | 中联重科股份有限公司 | Bolt mechanism control system and crane |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102705275A (en) | 2012-10-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102705275B (en) | Hydraulic control system for bolt and engineering machinery | |
| CN102874697B (en) | Hydraulic system for controlling amplitude variation of boom and crane | |
| CN102602826B (en) | Crane and hydraulic control system of single-cylinder telescopic mechanism thereof | |
| CN102619794B (en) | Single-cylinder bolt expansion and contraction control system and construction machine | |
| CN104692266B (en) | Hydraulic system for telescopic buffer of crane boom and crane | |
| CN103423221B (en) | Multi-oil-cylinder sequence telescopic hydraulic system and engineering machinery | |
| CN202643158U (en) | Constant tension hoisting operation wave compensation device | |
| CN102424036A (en) | Telescopic support leg device and engineering machinery | |
| CN104444866B (en) | Control system of telescopic mechanism and crane with same | |
| CN201525715U (en) | Crawler crane anti-back-tilting hydraulic system with function of switching high and low voltage | |
| CN205559389U (en) | Energy recuperation system and hoist hydraulic system are transferred to hoist | |
| CN102874687A (en) | Crane and hydraulic control system for single cylinder telescopic mechanism thereof | |
| CN104061199A (en) | Crane, single-cylinder bolt type telescopic boom and bolt mechanism hydraulic system thereof | |
| CN201934406U (en) | Hydraulic control system | |
| CN203543914U (en) | Landing leg control hydraulic system and engineering vehicle | |
| CN202181178U (en) | Hydraulic control system for automatic disassembly and assembly of suspension arm and crane employing system | |
| CN202829383U (en) | Hydraulic system for controlling amplitude variation of boom and crane | |
| CN103640974B (en) | Ship crane remote hydraulic control system | |
| CN211039191U (en) | Hydraulic drive system | |
| CN202415033U (en) | Locking system for landing leg of engineering machine and engineering machine | |
| CN110094382B (en) | Hydraulic control system of quick-change device | |
| CN204003684U (en) | Hoist, single-cylinder bolt type telescopic boom and bolt mechanism hydraulic system thereof | |
| US10690151B2 (en) | Device for recovering hydraulic energy by connecting two differential cylinders | |
| CN202756325U (en) | Double-valve-set power system | |
| CN216742234U (en) | Emergency hydraulic system and engineering machinery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |