CN201560071U - Switching control device for oil cylinders of jib - Google Patents
Switching control device for oil cylinders of jib Download PDFInfo
- Publication number
- CN201560071U CN201560071U CN2009202704032U CN200920270403U CN201560071U CN 201560071 U CN201560071 U CN 201560071U CN 2009202704032 U CN2009202704032 U CN 2009202704032U CN 200920270403 U CN200920270403 U CN 200920270403U CN 201560071 U CN201560071 U CN 201560071U
- Authority
- CN
- China
- Prior art keywords
- valve
- oil cylinder
- oil
- main reversing
- mouth
- 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.)
- Expired - Fee Related
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/18—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors used in combination for obtaining stepwise operation of a single controlled member
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/72—Counterweights or supports for balancing lifting couples
- B66C23/78—Supports, e.g. outriggers, for mobile cranes
- B66C23/80—Supports, e.g. outriggers, for mobile cranes hydraulically actuated
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/3056—Assemblies of multiple valves
- F15B2211/3059—Assemblies of multiple valves having multiple valves for multiple output members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
- F15B2211/7114—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators
- F15B2211/7121—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators the chambers being connected in series
Abstract
The embodiment of the utility model discloses a switching control device for oil cylinders of a jib, comprising an oil cylinder 1, an oil cylinder 2 and a main reversing valve 3, wherein a small cavity of the oil cylinder 1 is communicated with a small cavity of the oil cylinder 2; an A port of the main reversing valve 3 is connected with the small cavity of the oil cylinder 1; and a B port of the main reversing valve 3 is connected with a big cavity of the oil cylinder 1 and also connected with a big cavity of the oil cylinder 2. Through the switching control device for the oil cylinders of the jib, the switching control of the two oil cylinders of the jib is realized, the safe controllability of the oil cylinders during the operation process of the jib or the driving process of the complete unit is ensured, and the safe reliability of the jib is guaranteed.
Description
Technical field
The utility model relates to mechanical field, particularly a kind of crane arm oil cylinder switching control.
Background technology
Along with the demand of car hosit is increasing, the car hosit designing and manufacturing level is also progressively improving, and wherein in the car hosit design process, is an important and crucial part to the controlling Design of crane arm.The flexible of car hosit crane arm all is to finish by stretching of oil cylinder generally, for medium and small tonnage car hosit, normally realizes the flexible of 5 joint arm oil cylinders by two oil cylinders in conjunction with rope row.To the control of car hosit crane arm oil cylinder is guarantee to car hosit safe reliability in work and transportation, in the car hosit working process, safety in the crane arm operating range has been guaranteed in the control of crane arm oil cylinder; In car hosit car load driving process, the control of crane arm oil cylinder has been ensured in the safe reliability of crane arm in emergency circumstances such as sudden stop.
In the prior art, be to control two oil cylinders respectively to the control of crane arm oil cylinder by the main reversing valve of two Y type meta functions, be illustrated in figure 1 as the hydraulic schematic diagram of crane arm oil cylinder control setup in the present technology.Utilize the crane arm oil cylinder control setup of prior art, in the car hosit working process or in the car load operational process, when a main reversing valve breaks down, the oil cylinder that this main reversing valve is controlled flexible with out of control, the safe reliability of crane arm can not get guaranteeing.
The utility model content
Embodiment of the present utility model provides a kind of crane arm oil cylinder switching control, has realized the switching controls to two oil cylinders of car hosit crane arm, has ensured the safe reliability of crane arm.
The utility model embodiment provides a kind of crane arm oil cylinder switching control, comprises, and oil cylinder (1), oil cylinder (2), main reversing valve (3), wherein,
The loculus of the loculus of oil cylinder (1) and oil cylinder (2) interconnects, and the A mouth of main reversing valve (3) is connected with the loculus of oil cylinder (1), and the B mouth of main reversing valve (3) is connected with the big chamber of oil cylinder (1), and the B mouth of main reversing valve (3) is connected with the big chamber of oil cylinder (2).
Wherein, main reversing valve (3) is,
O type meta function change-over valve;
Oil cylinder (1) is a telescopic oil cylinder, and oil cylinder (2) is a telescopic oil cylinder.
Wherein, also comprise, two-way plug-in valve (7), core barrel (10), balance cock (11),
Core barrel (10) passes oil cylinder (1), distributes with the same axle center of oil cylinder (1), and an end of core barrel (10) is connected with two-way plug-in valve (7), and the other end is connected with balance cock (11);
The B mouth of main reversing valve (3) is connected with the big chamber of balance cock (11) with oil cylinder (2) by two-way plug-in valve (7), core barrel (10) successively.
Wherein, also comprise, two-way plug-in valve (8) and balance cock (12),
The B mouth of main reversing valve (3) is connected with the big chamber of balance cock (12) with oil cylinder (1) by two-way plug-in valve (8) successively.
Wherein, also comprise, change-over valve (9),
Change-over valve (9) is a P type three position four-way directional control valve, and change-over valve (9) is connected with two-way plug-in valve (7), and change-over valve (9) is connected with two-way plug-in valve (8).
Wherein, also comprise, shuttle valve (5),
One oil inlet of shuttle valve (5) is connected with the A mouth of main reversing valve (3), and another oil inlet of shuttle valve (5) is connected with the B mouth of main reversing valve 3, and the oil outlet of shuttle valve 5 is connected with change-over valve 9;
Change-over valve (9) is got oil by shuttle valve (5) from the A mouth of main reversing valve (3), and change-over valve (9) is got oil by shuttle valve (5) from the B mouth of main reversing valve (3).
Wherein, also comprise, electromagnetic valve (4),
Electromagnetic valve (4) is connected with the loculus of oil cylinder (1).
Wherein, also comprise, electromagnetic valve (6),
Electromagnetic valve (6) is installed between two-way plug-in valve (7) and the core barrel (10), is used for controlling releasing of the big chamber excess oil of oil cylinder (2).
Compared with prior art, the utlity model has following advantage:
By a kind of crane arm oil cylinder switching control that uses the utility model to provide, adopt an O type meta function main control valve to realize switching controls to two oil cylinders of crane arm, guaranteed in the crane arm operation process, perhaps the safety of oil cylinder is controlled in the car load driving process, has ensured the safe reliability of car hosit crane arm.
Description of drawings
In order to be illustrated more clearly in the utility model or technical scheme of the prior art, to do simple the introduction to the accompanying drawing of required use in the utility model or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the hydraulic schematic diagram of crane arm oil cylinder control setup in the present technology;
The hydraulic schematic diagram of a kind of crane arm oil cylinder switching control that Fig. 2 provides for the utility model embodiment;
Marginal data
1, oil cylinder 2, oil cylinder
3, main reversing valve 4, electromagnetic valve
5, shuttle valve 6, electromagnetic valve
7, two-way plug-in valve 8, two-way plug-in valve
9, change-over valve 10, core barrel
11, balance cock 12, balance cock.
The specific embodiment
Below in conjunction with the accompanying drawing in the utility model, the technical scheme in the utility model is carried out clear, complete description, obviously, described embodiment is a part of embodiment of the present utility model, rather than whole embodiment.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skills are obtained under the prerequisite of not making creative work belongs to the scope that the utility model is protected.
The utility model embodiment provides a kind of crane arm oil cylinder switching control, comprises, and oil cylinder 1, oil cylinder 2, main reversing valve 3, wherein,
The loculus of the loculus of oil cylinder 1 and oil cylinder 2 interconnects, and the A mouth of main reversing valve 3 is connected with the loculus of oil cylinder 1, and the B mouth of main reversing valve 3 is connected with the big chamber of oil cylinder 1, and the B mouth of main reversing valve 3 is connected with the big chamber of oil cylinder 2.
Wherein, main reversing valve 3 is,
O type meta function change-over valve;
Oil cylinder 1 is a telescopic oil cylinder, and oil cylinder 2 is a telescopic oil cylinder.
Wherein, also comprise, two-way plug-in valve 7, core barrel 10, balance cock 11,
Core barrel 10 passes oil cylinder 1, distributes with oil cylinder 1 same axle center, and an end of core barrel 10 is connected with two-way plug-in valve 7, and the other end is connected with balance cock 11;
The B mouth of main reversing valve 3 is connected with the big chamber of oil cylinder 2 with balance cock 11 by two-way plug-in valve 7, core barrel 10 successively.
Wherein, also comprise, two-way plug-in valve 8 and balance cock 12,
The B mouth of main reversing valve 3 is connected with the big chamber of oil cylinder 1 with balance cock 12 by two-way plug-in valve 8 successively.
Wherein, also comprise, change-over valve 9,
Change-over valve 9 is a P type three position four-way directional control valve, and change-over valve 9 is connected with two-way plug-in valve 7, and change-over valve 9 is connected with two-way plug-in valve 8.
Wherein, also comprise, shuttle valve 5,
One oil inlet of shuttle valve 5 is connected with the A mouth of main reversing valve 3, and another oil inlet of shuttle valve 5 is connected with the B mouth of main reversing valve 3, and the oil outlet of shuttle valve 5 is connected with change-over valve 9;
Change-over valve 9 is got oil by shuttle valve 5 from the A mouth of main reversing valve 3, and change-over valve 9 is got oil by shuttle valve 5 from the B mouth of main reversing valve 3, is used for the switching controls to oil cylinder 1 and oil cylinder 2.
Wherein, also comprise, electromagnetic valve 4,
Electromagnetic valve 4 is connected with the loculus of oil cylinder 1, be used for controlling oil cylinder 1 loculus pressure oil release and oil cylinder 2 loculuses in the releasing of pressure oil.
Wherein, also comprise, electromagnetic valve 6,
Electromagnetic valve 6 is installed between two-way plug-in valve 7 and the core barrel 10, is used for controlling oil cylinder 2 big chamber excess oil and releases.
By a kind of crane arm oil cylinder switching control that uses the utility model to provide, adopt an O type meta function main control valve to realize switching controls to two oil cylinders of automobile crane arm, guaranteed in the crane arm operation process, perhaps the safety of oil cylinder is controlled in the car load driving process, has ensured the safe reliability of car hosit crane arm.
The utility model embodiment provides a kind of crane arm oil cylinder switching control, realize the switching controls of two oil cylinders, the hydraulic principle of crane arm oil cylinder switching controls as shown in Figure 2, comprise, oil cylinder 1, oil cylinder 2, main reversing valve 3, electromagnetic valve 4, shuttle valve 5, electromagnetic valve 6, two-way plug-in valve 7, two-way plug-in valve 8, change-over valve 9, core barrel 10, balance cock 11 and balance cock 12.
Wherein, oil cylinder 1 is a telescopic oil cylinder, and oil cylinder 2 is a telescopic oil cylinder;
Main reversing valve 3 is an O type meta function change-over valve, and the P mouth of main reversing valve 3 connects oil pump, and the T mouth of main reversing valve 3 connects fuel tank; The loculus of oil cylinder 1 and oil cylinder 2 interconnects by sebific duct, and the A mouth of main reversing valve 3 connects the loculus of oil cylinder 1.
The B mouth of main reversing valve 3 is connected with two-way plug-in valve 7, and the B mouth of main reversing valve 3 is connected with two-way plug-in valve 8; Wherein, the B mouth of main reversing valve 3 connects two-way plug-in valve 7, B mouth pressure oil by the core barrel 10 in two-way plug-in valve 7, the oil cylinder 1, balance cock 11 to the big chamber of oil cylinder 2 fuel feeding; The B mouth of main reversing valve 3 connects two-way plug-in valve 8, and B mouth pressure oil passes through two-way plug-in valve 8, balance cock 12 to the big chamber of oil cylinder 1 fuel feeding; Core barrel 10 passes oil cylinder 1, distributes with oil cylinder 1 same axle center, and an end of core barrel 10 is connected with two-way plug-in valve 7, and the other end of core barrel 10 is connected with balance cock 11.
Two-way plug-in valve 7 is connected with change-over valve 9, two-way plug-in valve 8 is connected with change-over valve 9, change-over valve 9 is a P type three position four-way directional control valve, the closure of 9 pairs of two-way plug-in valves 7 of change-over valve and two-way plug-in valve 8 is controlled, thereby the pressure oil of control B mouth enters oil cylinder 2 and oil cylinder 1 by two-way plug-in valve 7 and two-way plug-in valve 8, realizes the switching controls to oil cylinder 1 and oil cylinder 2; Concrete, one oil inlet of shuttle valve 5 connects the A mouth of main reversing valve 3, and another oil inlet of shuttle valve 5 connects the B mouth of main reversing valve, and the oil outlet of shuttle valve 5 is connected with change-over valve 9, change-over valve 9 is got oil by shuttle valve 5 from the A mouth and the B mouth of main reversing valve 9, realizes the switching controls to oil cylinder 1 and oil cylinder 2.
Electromagnetic valve 4 is connected with the loculus of oil cylinder 1, and the loculus of oil cylinder 1 is connected with the loculus of oil cylinder 2, so electromagnetic valve 4 is connected with the loculus of oil cylinder 2, and electromagnetic valve 4 is used for controlling releasing of pressure oil in releasing of oil cylinder 1 loculus pressure oil and oil cylinder 2 loculuses.
Electromagnetic valve 6 is installed between two-way plug-in valve 7 and the core barrel 10, and the excess oil that is used for controlling oil cylinder 2 big chambeies is released.
The hydraulic principle of the crane arm oil cylinder switching control that the utility model embodiment provides is:
When requiring oil cylinder 2 to stretch out, the position work of main reversing valve 3 left side, the B mouth of main reversing valve 3 connects oil pump, oil pump passes through the B mouth to oil circuit input pressure oil, the DT4 of this seasonal change-over valve 9 gets electric, change-over valve 9 right position work, the epicoele conducting of two-way plug-in valve 7, epicoele control fluid is released the oil inlet and outlet conducting of two-way plug-in valve 7; Pressure oil enters the big chamber of oil cylinder 2 by flow through two-way plug-in valve 7, core barrel 10, balance cock 11 of the B mouth of main reversing valve 3, promotes oil cylinder 2 and stretch out action under the effect of pressure oil, and the excess oil in the oil cylinder 2 big chambeies is released by electromagnetic valve 6; Pressure oil enters the big chamber of oil cylinder 2, promotes oil cylinder 2 and stretches out, and pressure oil is got back in the fuel tank through the A mouth in the loculus of oil cylinder 2 simultaneously.The position work of main reversing valve 3 left side, the DT4 of change-over valve 9 gets electric, finishes the action of stretching out of oil cylinder 2.
When requiring oil cylinder 1 to stretch out, the position work of main reversing valve 3 left side, the B mouth of main reversing valve 3 connects oil pump, it is electric to make the DT3 of change-over valve 9 get, the position work of change-over valve 9 left side, the epicoele conducting of two-way plug-in valve 8, epicoele control fluid is released, the import and export conducting of two-way plug-in valve 8, pressure oil enters the big chamber of oil cylinder 1 by flow through two-way plug-in valve 8, balance cock 12 of the B mouth of main reversing valve 3, promotes oil cylinder 1 and stretches out action.The position work of main reversing valve 3 left side, the DT3 of change-over valve 9 gets electric, finishes the action of stretching out of oil cylinder 1.
When requiring oil cylinder 2 withdrawals, main reversing valve 3 right position work, the A mouth of main reversing valve 3 connects oil pump, pressure oil enters the loculus of oil cylinder 2 behind the loculus of oil cylinder 1 by the A mouth, the DT4 of this seasonal change-over valve 9 gets electric, change-over valve 9 right position work, the epicoele conducting of two-way plug-in valve 7, epicoele control fluid is released the oil inlet and outlet conducting of two-way plug-in valve 7; The big cavity pressure oil of oil cylinder 2 through balance cock 11, core barrel 10, two-way plug-in valve 7, through the B of main reversing valve 3 mouth to tank drainback; Pressure oil enters the loculus of oil cylinder 2 through the A of main reversing valve 3 mouth, and the big cavity pressure oil in the oil cylinder 2 is got back to fuel tank, oil cylinder 2 action of withdrawing.Main reversing valve 3 right position work, the DT4 of change-over valve 9 gets electric, finishes the withdrawal action of oil cylinder 2.
When requiring oil cylinder 1 withdrawal, main reversing valve 3 right position work, the A mouth of main reversing valve 3 connects oil pump, pressure oil enters the loculus of oil cylinder 1 by the A mouth, the DT3 of this seasonal change-over valve 9 gets electric, the position work of change-over valve 9 left side, the epicoele conducting of two-way plug-in valve 8, epicoele control fluid is released the oil inlet and outlet conducting of two-way plug-in valve 8; The big cavity pressure oil of oil cylinder 1 through balance cock 12, two-way plug-in valve 8, through the B of main reversing valve 3 mouth to tank drainback; Pressure oil enters the loculus of oil cylinder 1 through the A of main reversing valve 3 mouth, and the big cavity pressure oil in the oil cylinder 1 is got back to fuel tank, oil cylinder 1 action of withdrawing.Main reversing valve 3 right position work, the DT3 of change-over valve 9 gets electric, finishes the withdrawal action of oil cylinder 1.
When requiring the loculus release of oil cylinder 1,,, when the loculus to oil cylinder 1 carries out release, also oil cylinder 2 is carried out release simultaneously according to the flowing power of pressure oil because the loculus of oil cylinder 1 and the loculus of oil cylinder 2 interconnect by sebific duct; It is electric to make electromagnetic valve 6 get, and the pressure oil in oil cylinder 1 and oil cylinder 2 loculuses is led oil sump tank.Electromagnetic valve 6 gets electric, finishes the release to pressure oil in the loculus of oil cylinder 1 and oil cylinder 2.
When car hosit is under the car load running state, for guarantee at sudden stop or when turning oil cylinder promote not controlled protracting and have an accident 3 times meta work of control main reversing valve, 9 times meta work of change-over valve of crane arm; 3 times meta work of main reversing valve, the A mouth of main reversing valve 3 and B mouth stop to oil cylinder 1 and oil cylinder 2 delivery pressure oil, the big chamber of oil cylinder 1 and oil cylinder 2 and all lockings of loculus; 9 times meta work of change-over valve, two-way plug-in valve 7 and two-way plug-in valve 8 turn-off, and stop to oil cylinder 1 and oil cylinder 2 delivery pressure oil; In addition, through balance cock 12, through balance cock 11, balance cock 11 and balance cock 12 play the effect of oleo cushion and oil pressure adjusting in oil circuit, double protective effect is played in the locking of oil cylinder when pressure oil enters oil cylinder 2 when pressure oil enters oil cylinder 1.Safety and reliability when therefore, having controlled crane arm work by the locking actv. of two oil cylinders.
By using the switching control of a kind of crane arm oil cylinder that the utility model embodiment provides, adopt an O type meta function main control valve to realize switching controls to two oil cylinders of crane arm, guaranteed in the crane arm operation process, perhaps the safety of oil cylinder is controlled in the car load driving process, has ensured the safe reliability of car hosit crane arm.
The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be looked protection domain of the present utility model.
Claims (8)
1. a crane arm oil cylinder switching control is characterized in that, comprise, and oil cylinder (1), oil cylinder (2), main reversing valve (3), wherein,
The loculus of the loculus of oil cylinder (1) and oil cylinder (2) interconnects, and the A mouth of main reversing valve (3) is connected with the loculus of oil cylinder (1), and the B mouth of main reversing valve (3) is connected with the big chamber of oil cylinder (1), and the B mouth of main reversing valve (3) is connected with the big chamber of oil cylinder (2).
2. device as claimed in claim 1 is characterized in that, main reversing valve (3) is,
O type meta function change-over valve;
Oil cylinder (1) is a telescopic oil cylinder, and oil cylinder (2) is a telescopic oil cylinder.
3. device as claimed in claim 1 is characterized in that, also comprises, and two-way plug-in valve (7), core barrel (10), balance cock (11),
Core barrel (10) passes oil cylinder (1), distributes with the same axle center of oil cylinder (1), and an end of core barrel (10) is connected with two-way plug-in valve (7), and the other end is connected with balance cock (11);
The B mouth of main reversing valve (3) is connected with the big chamber of balance cock (11) with oil cylinder (2) by two-way plug-in valve (7), core barrel (10) successively.
4. as claim 1 or 3 described devices, it is characterized in that, also comprise, two-way plug-in valve (8) and balance cock (12),
The B mouth of main reversing valve (3) is connected with the big chamber of balance cock (12) with oil cylinder (1) by two-way plug-in valve (8) successively.
5. device as claimed in claim 4 is characterized in that, also comprises, and change-over valve (9),
Change-over valve (9) is a P type three position four-way directional control valve, and change-over valve (9) is connected with two-way plug-in valve (7), and change-over valve (9) is connected with two-way plug-in valve (8).
6. device as claimed in claim 5 is characterized in that, also comprises, and shuttle valve (5),
One oil inlet of shuttle valve (5) is connected with the A mouth of main reversing valve (3), and another oil inlet of shuttle valve (5) is connected with the B mouth of main reversing valve (3), and the oil outlet of shuttle valve (5) is connected with change-over valve (9);
Change-over valve (9) is got oil by shuttle valve (5) from the A mouth of main reversing valve (3), and change-over valve (9) is got oil by shuttle valve (5) from the B mouth of main reversing valve (3).
7. device as claimed in claim 1 is characterized in that, also comprises, and electromagnetic valve (4),
Electromagnetic valve (4) is connected with the loculus of oil cylinder (1).
8. device as claimed in claim 1 is characterized in that, also comprises, and electromagnetic valve (6),
Electromagnetic valve (6) is installed between two-way plug-in valve (7) and the core barrel (10).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202704032U CN201560071U (en) | 2009-11-20 | 2009-11-20 | Switching control device for oil cylinders of jib |
| PCT/CN2010/074275 WO2011060639A1 (en) | 2009-11-20 | 2010-06-22 | Switching control device for cylinders of crane boom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202704032U CN201560071U (en) | 2009-11-20 | 2009-11-20 | Switching control device for oil cylinders of jib |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201560071U true CN201560071U (en) | 2010-08-25 |
Family
ID=42625218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202704032U Expired - Fee Related CN201560071U (en) | 2009-11-20 | 2009-11-20 | Switching control device for oil cylinders of jib |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN201560071U (en) |
| WO (1) | WO2011060639A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103343760A (en) * | 2013-07-28 | 2013-10-09 | 安徽柳工起重机有限公司 | Switching valve of crane jib |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS556765B2 (en) * | 1973-08-23 | 1980-02-19 | ||
| DE3324270C2 (en) * | 1983-07-06 | 1986-08-07 | Montanhydraulik GmbH, 4755 Holzwickede | Telescopic cylinder system |
| CN1086789A (en) * | 1992-11-08 | 1994-05-18 | 铁道部兰州机车工厂 | Hydraulic driving system for single hook double hoisting crane |
| US6029559A (en) * | 1998-04-06 | 2000-02-29 | Grove U.S. L.L.C. | Telescoping system with multiple single-stage telescopic cylinders |
| JP2009150462A (en) * | 2007-12-20 | 2009-07-09 | Caterpillar Japan Ltd | Hydraulic control system for working machine |
| CN201325841Y (en) * | 2008-12-19 | 2009-10-14 | 上海三一科技有限公司 | High-low pressure switching hydraulic system for preventing back tilting of caterpillar crane jib |
-
2009
- 2009-11-20 CN CN2009202704032U patent/CN201560071U/en not_active Expired - Fee Related
-
2010
- 2010-06-22 WO PCT/CN2010/074275 patent/WO2011060639A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103343760A (en) * | 2013-07-28 | 2013-10-09 | 安徽柳工起重机有限公司 | Switching valve of crane jib |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011060639A1 (en) | 2011-05-26 |
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