CN203374544U - Double-cylinder hydraulic device and lifting device - Google Patents

Double-cylinder hydraulic device and lifting device Download PDF

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Publication number
CN203374544U
CN203374544U CN201320332476.6U CN201320332476U CN203374544U CN 203374544 U CN203374544 U CN 203374544U CN 201320332476 U CN201320332476 U CN 201320332476U CN 203374544 U CN203374544 U CN 203374544U
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CN
China
Prior art keywords
hydraulic
hydraulic jacks
cylinder
oil
pressure
Prior art date
Application number
CN201320332476.6U
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Chinese (zh)
Inventor
刘可
李候清
罗康松
刘希梁
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徐工集团工程机械股份有限公司
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Priority to CN201320332476.6U priority Critical patent/CN203374544U/en
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Publication of CN203374544U publication Critical patent/CN203374544U/en

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Abstract

The utility model discloses a double-cylinder hydraulic device and a lifting device. The double-cylinder hydraulic device comprises two hydraulic oil cylinders, two overflow valves and two balance valves. Bodies of the two hydraulic oil cylinders are fixedly connected. Oil pressure outputting openings of the two overflow valves are communicated with rod cavities of the two hydraulic oil cylinders respectively. Oil pressure outputting openings of the two balance valves are communicated with rodless cavities of the two hydraulic oil cylinders respectively. According to the double-cylinder hydraulic device and the lifting device, position precision of displacement of the two hydraulic oil cylinders is ensured so that the oil cylinders can stably operate within a reliable speed and the two oil cylinders are equally stressed. Damage to a structural part and the oil cylinders is avoided. Meanwhile, in the time of stopping and transportation, a piston rod will not automatically extend outwards due to the inertia.

Description

A kind of double-cylinder hydraulic device and crane gear
Technical field
The utility model relates to the hydraulic equipment technical field, relates in particular to a kind of double-cylinder hydraulic device and crane gear.
Background technique
Along with scientific and technological progress, the use amount of Large-scale Hoisting equipment is more and more.At present substantially all use the form of elevator to promote and the below weight.But the space that the layout of elevator takies is larger, and space is also had to special requirement.So the equipment of my company promotes and transfers weight by hydraulic jack flexible.
Workability based on oil cylinder, the maximum thrust of single oil cylinder is limited.Export larger tractional force for the mode that oil cylinder is passed, just need to pass the ouput force that provides larger with twin-tub or multi-cylinder parallel.Domestic existing twin-tub synchronous control technique generally has following shortcoming:
1, give two cylinder conveying liquid pressure with the same power source, drive twin-tub synchronous operation.If oil cylinder with equilibrium valve, is difficult to guarantee that the large chamber of two oil hydraulic cylinders equates fully with the pressure between equilibrium valve, and regulates without self adaption.
2, can not guarantee equating of two hydraulic cylinder force sizes, easily cause the hydraulic cylinder force unbalance loading, cause security incident.
Stressed equating when 3, existing mode can guarantee that twin-tub exits, but stressed the equating in the time of can not guaranteeing that twin-tub is retracted.
Therefore, need a kind of novel double-cylinder hydraulic device.
Summary of the invention
In view of this, a technical problem to be solved in the utility model is to provide a kind of double-cylinder hydraulic device, and 2 hydraulic jacks are fixedly connected with and arrange respectively hydraulic circuit.
A kind of double-cylinder hydraulic device comprises: 2 hydraulic jacks, 2 relief valves and 2 equilibrium valves; The cylinder body of described 2 hydraulic jacks is fixedly connected with; The oil pressure delivery outlet of described 2 relief valves is connected with the rod chamber of described 2 hydraulic jacks respectively; The oil pressure delivery outlet of described 2 equilibrium valves is connected with the rodless cavity of described 2 hydraulic jacks respectively; Wherein, when the piston rod of described 2 hydraulic jacks all stretches out, pressure oil enters respectively the rodless cavity of described 2 hydraulic jacks by the oil pressure delivery outlet of described 2 equilibrium valves, the pressure oil in the rod chamber of described 2 hydraulic jacks flows out by described 2 relief valves; When the piston rod of described 2 hydraulic jacks all bounces back, pressure oil enters respectively the rod chamber of described 2 hydraulic jacks by the oil pressure delivery outlet of described 2 relief valves, and the pressure oil in the rodless cavity of described 2 hydraulic jacks flows out by described 2 equilibrium valves.
According to an embodiment of the present utility model, further, the rod chamber of described 2 hydraulic jacks is connected by pipeline, and the rodless cavity of described 2 hydraulic jacks also is connected by pipeline.
According to an embodiment of the present utility model, further, also comprise 2 pressure transducers and supervisory device; Described 2 pressure transducers are separately positioned in the rod chamber of described 2 hydraulic jacks or in the rodless cavity of described 2 hydraulic jacks, described 2 pressure transducers are electrically connected to described control gear, and the oil cylinder working-pressure signal of detection is sent to described supervisory device.
According to an embodiment of the present utility model, further, the cylinder body of described 2 hydraulic jacks welds or is threaded.
According to an embodiment of the present utility model, further, described 2 relief valves are all straight ejector half relief valve or straight ejector half relief valve band repairing one-way valve.
According to an embodiment of the present utility model, further, described 2 equilibrium valves are all the electric-hydraulic proportion equilibrium valve.
A kind of crane gear, comprise double-cylinder hydraulic device as above.
Double-cylinder hydraulic device of the present utility model and crane gear, can guarantee the positional accuracy that 2 hydraulic jacks move, can make oil cylinder smooth running in reliable speed, guaranteed the stressed identical of two oil cylinders, avoided to the destruction of structural member with to the damage of oil cylinder, guaranteed when stopping and transporting, piston rod is not because inertia and auto-extending goes simultaneously.
The accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The embodiment's that Fig. 1 is double-cylinder hydraulic device of the present utility model schematic diagram.
Embodiment
With reference to the accompanying drawings the utility model is described more fully, exemplary embodiment of the present utility model wherein is described.Below in conjunction with the accompanying drawing in the utility model embodiment, the technological scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiments.Embodiment based in the utility model, those of ordinary skills are not making under the creative work prerequisite the every other embodiment who obtains, and all belong to the scope of the utility model protection.Below in conjunction with figure and embodiment, the technical solution of the utility model is carried out to many-sided description.
The embodiment's that Fig. 1 is double-cylinder hydraulic device of the present utility model schematic diagram.As shown in the figure, the double-cylinder hydraulic device comprises: 2,2 relief valves 1 of 2 hydraulic jacks and 2 equilibrium valves 4.
The cylinder body of 2 hydraulic jacks 2 is fixedly connected with.Can or be threaded by welding, also can between 2 cylinder bodies, connecting rod be set, 2 cylinder bodies weld or are threaded etc. with connecting rod respectively.
Equilibrium valve is a kind of adjustment type valve with number lock specific function, and reasonably flow rate distribution, can regulate pressure drop and flow, exactly in order to improve liquid flowing state in pipe network system simultaneously.
Relief valve be a kind of maintain the valve inlet pressure be bordering on constant, the pressure controlled valve that in system, unnecessary fluid refluxes by this valve.
The oil pressure delivery outlet of 2 relief valves 1 is connected with the rod chamber of 2 hydraulic jacks 2 respectively.The oil pressure delivery outlet of 2 equilibrium valves 4 is connected with the rodless cavity of 2 hydraulic jacks 2 respectively.
Rod chamber in the utility model refers to the residing oil pocket of the piston rod in hydraulic jack, and rodless cavity refers to the oil pocket that there is no piston rod in hydraulic jack.
The A mouth is that hydraulic jack is retracted into hydraulic fluid port, and the B mouth is that hydraulic jack stretches out filler opening, and the C mouth is equilibrium valve oil circuit control drain tap, and the D mouth is the oil circuit control filler opening.
Under the state all stretched out at the piston rod of 2 hydraulic jacks 2, pressure oil enters respectively the rodless cavity of 2 hydraulic jacks 2 by the oil pressure delivery outlet of 2 equilibrium valves 4, and the pressure oil in the rod chamber of 2 hydraulic jacks 2 flows out by 2 relief valves 1.
Under the state of the piston rod of 2 hydraulic jacks 2 retraction, pressure oil enters respectively the rod chamber of 2 hydraulic jacks 2 by the oil pressure delivery outlet of 2 relief valves 1, and the pressure oil in the rodless cavity of 2 hydraulic jacks 2 flows out by 2 equilibrium valves 4.
According to an embodiment of the present utility model, the rod chamber of 2 hydraulic jacks 2 is connected by pipeline, and the rodless cavity of 2 hydraulic jacks 2 also is connected by pipeline.
According to an embodiment of the present utility model, 2 pressure transducers 3 are separately positioned in the rodless cavity of 2 hydraulic jacks, and 2 pressure transducers 2 are electrically connected to control gear, and the oil cylinder working-pressure signal of detection is sent to supervisory device.
According to an embodiment of the present utility model, the cylinder body of 2 hydraulic jacks 2 is rigidly connected, and controls the stressed equal and opposite in direction of 2 hydraulic jacks 2 by hydraulic way.
The large chamber of 2 hydraulic jacks 2 or loculus (rodless cavity or rod chamber) are directly linked up with hydraulic circuit respectively; making it internal pressure equates constantly; in stressed large large chamber (rodless cavity), 2 pressure transducers 3 are set simultaneously; monitor stressed cavity pressure by program and whether equate, carry out double shielding.
The process of 2 hydraulic jacks, 2 actions is: when twin-tub stretches out, and the oil-feed of B chamber, the one-way valve by equilibrium valve 4 inside enters 2 large chambeies (rodless cavity), 2 loculuses (rod chamber)
Be provided with 2 relief valves 1, guarantee stationarity, reliability that oil cylinder starts and stops.
In the time of the twin-tub retraction: by the oil-feed of A chamber, control oil sources passing ratio solenoid valve P1, the P2 in D chamber control the opening of equilibrium valve, and oil cylinder can steadily be bounced back with arbitrary speed.
In the time of the twin-tub stop motion, 2 large chambeies (rodless cavity) rely on equilibrium valve 4 to keep pressure, and 2 loculuses (rod chamber) rely on relief valve 1 to keep pressure, make the oil cylinder can be in illegal state at both direction.
2 large chambeies (rodless cavity), being connected respectively of 2 loculuses (rod chamber), can guarantee 2 large chambeies (rodless cavity), the pressure of 2 loculuses (rod chamber) equates constantly.
If one of them equilibrium valve 4 and a relief valve 1 have deviation, do not cause stressed unequal of 2 hydraulic jacks 2 yet.The Security of weight and the controllability of oil cylinder have been guaranteed when large and heavy objects is passed.
According to an embodiment of the present utility model, pressure transducer 3 need to meet the demand of oil cylinder working pressure, and the size of minimum value.
Equilibrium valve 4 has been selected the electric-hydraulic proportion one-way balance valve, and this valve has unidirectional repairing and flow controlled, overcompensation function continuously, oil cylinder is operated steadily, speed is controlled, forbid reliable.
Choosing of relief valve 1 will consider that big or small cavity area is than the difference in flow caused, can not cause the loculus back pressure of oil cylinder too high, the repairing function will be arranged simultaneously, makes oil cylinder energy passive compression, meets different operating modes.
According to an embodiment of the present utility model, a kind of crane gear, for example hoist, tower crane etc., comprise double-cylinder hydraulic device as above.
Double-cylinder hydraulic device of the present utility model and crane gear have advantages of following:
1, two pass cylinder with being rigidly connected, the positional accuracy while having guaranteed two oil cylinder synchronous workings.This precision is that other Placements can not reach.Total travel can reach the mm class precision.
2, chosen the electric-hydraulic proportion equilibrium valve, and, with overload protection, can make oil cylinder smooth running in reliable speed, and flow has been very large.Be suitable for the super-large diameter oil cylinder and pass operating mode.
3, the two large chambeies of oil cylinder, loculus are connected respectively.Guaranteed the stressed identical of two oil cylinders, avoided to the destruction of structural member with to the damage of oil cylinder.Pressure transducer is arranged simultaneously, increased stressed identical protective layer from electric aspect.
4, loculus is provided with the repairing relief valve, is satisfied with that oil cylinder initiatively bounces back, the switching of passive retraction, has guaranteed when stopping and transporting simultaneously, and cylinder rod is not because inertia and auto-extending goes.
Double-cylinder hydraulic device of the present utility model and crane gear; adopt electro-hydraulic proportional control technology to control the action of stretching, contract of oil cylinder; connect and guaranteed equating of hydraulic pressure by double-cylinder hydraulic; guaranteed that cylinder force equates simultaneously; adopt the electic protection program; as second layer protection, simultaneously can be judgment result displays out, and can realize that active and passive retraction switch.
Description of the present utility model provides for example with for the purpose of describing, and is not exhaustively or by the utility model to be limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is for better explanation principle of the present utility model and practical application, thereby and makes those of ordinary skill in the art can understand the various embodiments with various modifications that the utility model design is suitable for special-purpose.

Claims (7)

1. a double-cylinder hydraulic device, is characterized in that, comprising:
2 hydraulic jacks, 2 relief valves and 2 equilibrium valves;
The cylinder body of described 2 hydraulic jacks is fixedly connected with; The oil pressure delivery outlet of described 2 relief valves is connected with the rod chamber of described 2 hydraulic jacks respectively; The oil pressure delivery outlet of described 2 equilibrium valves is connected with the rodless cavity of described 2 hydraulic jacks respectively;
Wherein, when the piston rod of described 2 hydraulic jacks all stretches out, pressure oil enters respectively the rodless cavity of described 2 hydraulic jacks by the oil pressure delivery outlet of described 2 equilibrium valves, the pressure oil in the rod chamber of described 2 hydraulic jacks flows out by described 2 relief valves;
When the piston rod of described 2 hydraulic jacks all bounces back, pressure oil enters respectively the rod chamber of described 2 hydraulic jacks by the oil pressure delivery outlet of described 2 relief valves, and the pressure oil in the rodless cavity of described 2 hydraulic jacks flows out by described 2 equilibrium valves.
2. device as claimed in claim 1 is characterized in that:
The rod chamber of described 2 hydraulic jacks is connected by pipeline, and the rodless cavity of described 2 hydraulic jacks also is connected by pipeline.
3. device as claimed in claim 1 is characterized in that:
Also comprise 2 pressure transducers and supervisory device;
Described 2 pressure transducers are separately positioned in the rodless cavity of described 2 hydraulic jacks, and described 2 pressure transducers are electrically connected to described supervisory device, and the oil cylinder working-pressure signal of detection is sent to described supervisory device.
4. device as claimed in claim 2 is characterized in that:
The cylinder body of described 2 hydraulic jacks welds or is threaded.
5. device as claimed in claim 1 is characterized in that:
Described 2 relief valves are all straight ejector half relief valve or straight ejector half relief valve band repairing one-way valve.
6. device as claimed in claim 1 is characterized in that::
Described 2 equilibrium valves are all the electric-hydraulic proportion equilibrium valve.
7. a crane gear is characterized in that:
Comprise double-cylinder hydraulic device as described as claim 1 to 6 any one.
CN201320332476.6U 2013-06-08 2013-06-08 Double-cylinder hydraulic device and lifting device CN203374544U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320332476.6U CN203374544U (en) 2013-06-08 2013-06-08 Double-cylinder hydraulic device and lifting device

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Application Number Priority Date Filing Date Title
CN201320332476.6U CN203374544U (en) 2013-06-08 2013-06-08 Double-cylinder hydraulic device and lifting device

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CN203374544U true CN203374544U (en) 2014-01-01

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103277357A (en) * 2013-06-08 2013-09-04 徐工集团工程机械股份有限公司 Double-cylinder hydraulic apparatus and lifting device
CN105483871A (en) * 2016-01-26 2016-04-13 湖州南浔中兴丝织有限公司 Hot press unit of silk winding and strip forming production device
CN106949105A (en) * 2017-04-07 2017-07-14 北京航空航天大学 The two-way proportional balanced valve and its application system in a kind of over-running load speed limit loop
CN108507906A (en) * 2018-03-30 2018-09-07 上海海事大学 Simulate the test device and method of the infiltration of deep-sea hydrogen
CN110817714A (en) * 2019-12-07 2020-02-21 荆门市佰思机械科技有限公司 Hydraulic system of creeping formwork device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103277357A (en) * 2013-06-08 2013-09-04 徐工集团工程机械股份有限公司 Double-cylinder hydraulic apparatus and lifting device
CN105483871A (en) * 2016-01-26 2016-04-13 湖州南浔中兴丝织有限公司 Hot press unit of silk winding and strip forming production device
CN105483871B (en) * 2016-01-26 2017-11-24 湖州南浔中兴丝织有限公司 Silk is around the heat-pressure unit for being rolled into bar process units
CN106949105A (en) * 2017-04-07 2017-07-14 北京航空航天大学 The two-way proportional balanced valve and its application system in a kind of over-running load speed limit loop
CN106949105B (en) * 2017-04-07 2018-12-28 北京航空航天大学 The two-way proportional balanced valve and its application system in a kind of over-running load speed limit circuit
CN108507906A (en) * 2018-03-30 2018-09-07 上海海事大学 Simulate the test device and method of the infiltration of deep-sea hydrogen
CN108507906B (en) * 2018-03-30 2020-12-29 上海海事大学 Testing device and method for simulating deep sea hydrogen permeation
CN110817714A (en) * 2019-12-07 2020-02-21 荆门市佰思机械科技有限公司 Hydraulic system of creeping formwork device

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