CN106762883A - Hydraulic system and tower crane - Google Patents
Hydraulic system and tower crane Download PDFInfo
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- CN106762883A CN106762883A CN201611257893.3A CN201611257893A CN106762883A CN 106762883 A CN106762883 A CN 106762883A CN 201611257893 A CN201611257893 A CN 201611257893A CN 106762883 A CN106762883 A CN 106762883A
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- 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
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- Engineering & Computer Science (AREA)
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- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a hydraulic system and a tower crane, wherein the hydraulic system comprises: a plurality of hydraulic cylinders (1); a hydraulic medium supply mechanism connected to the rod chambers and the rodless chambers of the plurality of hydraulic cylinders (1) through hydraulic lines; the hydraulic medium supply mechanism is connected to a rodless cavity branch of each hydraulic cylinder (1) and is provided with a high-pressure balance valve (17), the control end of each high-pressure balance valve (17) is connected to the rod cavity of the corresponding hydraulic cylinder (1), a balance branch is connected to the rodless cavity branch between the high-pressure balance valve (17) and the hydraulic cylinder (1), and the balance branches are communicated with each other. Through a plurality of no pole chamber branches that a plurality of balanced branch roads intercommunication were equipped with high pressure balance valve, can be when one of them high pressure balance valve draining is too fast or too slow the pressure in a plurality of no pole chamber branches for the piston rod of a plurality of pneumatic cylinders can stretch out and draw back in step, improves the stability that the pneumatic cylinder supported the load.
Description
Technical field
The present invention relates to fluid power system, in particular it relates to a kind of hydraulic system and tower crane.
Background technology
In the work progress of heavy construction, large-scale " building crane " (i.e. tower crane) shows important day.At present, it is domestic large-scale
" jack-up system " of tower crane is mostly " Multi-cylinder jack-up system " (4 cylinders or 6 cylinders), i.e., the system is by one " pumping plant " and many
" jacking cylinder " is constituted.
Wherein, during retractable shoulder pole girder, the synchronization accuracy of oil cylinder depends entirely on the precision of " flow speed control valve ", can
It is not strong by property；And be mutually matched, it is necessary to adjust 8 " flow speed control valves " in debugging process, it is cumbersome time-consuming.
In tower crane hydraulic jacking system, the installation of hydraulic jack is realized mainly by balanced valve (or hydraulic lock), but
In the practical operation of Multi-cylinder jack-up system, balanced valve can not solve problems with：
1st, when tower crane is when building site has a power failure suddenly during jacking or decline, tower crane need to be dropped into former peace under power down mode
Dress position, to prevent tower crane for a long time in " suspension " state；
2nd, when let out in the balanced valve on an oil cylinder is because occurring speed than the Inner of other balanced valves let out speed it is obvious bigger than normal when,
Other oil cylinders are needed synchronously to decline；
3rd, when the balanced valve on an oil cylinder is damaged suddenly because of some reasons, it is desirable to have prevent the work(of oil cylinder tenesmus suddenly
Can, other oil cylinder energy automatic synchronizations decline, at the same time it is wished that other in-oil cylinder hydraulic oil can flow back to fuel tank, rather than from damaging
Ground pollution environment is drained at balanced valve.
4th, there is the situation of no-load running, i.e. piston rod and complete flexible operation under no load in jacking cylinder,
The end coupling (shoulder pole girder) of each two (or more) piston rod should synchronously stretch (lifting).
5th, according to tower crane design specification, in load conditions, decrease speed not above the rate of climb, however, because load
During decline, oil cylinder " rod chamber " oil-feed declines more faster than rising, it is therefore desirable in rod chamber when oil pump capacity is not restricted
Flow when " flow speed control valve " limitation declines is set in oil circuit.And when unloaded (during lifting shoulder pole girder, shoulder pole girder is very light, equivalent to
It is unloaded), then require that speed is fast, flow should not be limited, the presence of flow speed control valve makes the system cannot realize this function, this
When limitation of the flow speed control valve to flow both reduce efficiency, power, the energy are wasted again.
The content of the invention
It is an object of the invention to provide the hydraulic system that a kind of multiple hydraulic cylinders are capable of synchronization lifting.
To achieve these goals, the invention provides a kind of hydraulic system, including：Multiple hydraulic cylinders；Hydraulic medium is supplied
Mechanism is answered, the hydraulic medium organization of supply is connected to the rod chamber and rodless cavity of multiple hydraulic cylinders by fluid pressure line；Its
In, the hydraulic medium organization of supply is connected on the rodless cavity branch road of each hydraulic cylinder and is equipped with high-pressure balance valve, and
And the control end of each high-pressure balance valve is connected to the rod chamber of the corresponding hydraulic cylinder, the high-pressure balance valve and institute
State and balancing branch is connected with the rodless cavity branch road between hydraulic cylinder, multiple balancing branchs communicate with each other.
Preferably, each described balancing branch is provided with choke valve.
Preferably, the choke valve is orifice plug.
Preferably, the balancing branch is commonly connected to be provided with the pressure relief pipe of hand-operated direction valve such that it is able to selectivity
Discharge hydraulic medium.
Preferably, explosion-proof valve is provided with the rodless cavity of the hydraulic cylinder, the explosion-proof valve can be in the feelings more than predetermined pressure difference
The hydraulic cylinder self locking is realized under condition, is continued to move to the piston rod for preventing the hydraulic cylinder.
Preferably, the hydraulic medium organization of supply is connected to the fluid pressure line of the rod chamber of multiple hydraulic cylinders and includes
The load pipeline and unloaded pipeline being connected in parallel to each other, the load pipeline and the unloaded pipeline are connected to institute by pilot operated directional control valve
State hydraulic medium organization of supply, with optionally through it is described load one of pipeline and the unloaded pipeline be communicated in it is many
The individual hydraulic cylinder, the piston rod of hydraulic cylinder is connected as one group by connector described at least two of which, so that described in every group
The piston rod of hydraulic cylinder synchronously stretches, and each described unloaded pipeline of every group of hydraulic cylinder includes being connected to each liquid
The unloaded branch road of the rod chamber of cylinder pressure, is connected between the described unloaded branch road of hydraulic cylinder described in every group by synchronous valve.
Preferably, the balancing branch is connected with pressure-control valve, and the pressure-control valve can be sensed in the rodless cavity
Pressure, to control the switching of valve element.
Preferably, the load pipeline includes that multiple is connected to the load branch of the rod chamber of each hydraulic cylinder, and each is born
Carry branch road and be provided with hydraulic control one-way valve, the pressure-control valve is connected and controls the hydraulic control one-way valve.
Preferably, the flow speed control valve of control hydraulic medium flow velocity is provided with the load pipeline.
Preferably, the piston rod of the hydraulic cylinder supports load along gravity direction upwards and driving load is lifted.
In addition, present invention also offers a kind of tower crane, wherein, the tower crane includes the hydraulic pressure system according to above scheme
System.
By above-mentioned technical proposal, the multiple rodless cavity branch roads for being provided with high-pressure balance valve are connected by multiple balancing branchs,
Pressure that can be when a high-pressure balance valve draining is too fast or excessively slow wherein in the multiple rodless cavity branch roads of balance so that multiple liquid
The piston rod of cylinder pressure can synchronously stretch, and improve stability of the hydraulic cylinder to load support.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute the part of specification, with following tool
Body implementation method is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is a kind of schematic diagram of the hydraulic system of implementation method of the invention；
Fig. 2 is stream state of the hydraulic system shown in Fig. 1 in the case where propradation is loaded；
Fig. 3 is stream state of the hydraulic system shown in Fig. 1 under a load under drop state；
Fig. 4 is the stream state that piston stretches out in zero load of hydraulic system shown in Fig. 1；
Fig. 5 is the stream state that piston withdraws in zero load of hydraulic system shown in Fig. 1；
Fig. 6 is the connection diagram of hydraulic cylinder of the invention and connector.
Description of reference numerals
The hand-operated direction valve of 1 hydraulic cylinder 2
The pilot operated directional control valve of 3 synchronous valve 4
The reversal valve of 5 low-pressure balance valve 6
The motor of 7 return filter 8
The oil absorption filter of 9 fuel tank 10
The pressure gauge of 11 oil pump 12
The hydraulic control one-way valve of 13 flow speed control valve 14
The explosion-proof valve of 15 pressure-control valve 16
The choke valve of 17 high-pressure balance valve 18
19 connectors
Specific embodiment
Specific embodiment of the invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
Hereinafter, illustrated hydraulic oil as hydraulic medium, but it is that the scope of the present invention is limited that this should not be construed
It is fixed.
The invention provides a kind of hydraulic system, including：
Multiple hydraulic cylinders 1；Hydraulic medium organization of supply, the hydraulic medium organization of supply is connected to multiple by fluid pressure line
The rod chamber and rodless cavity of the hydraulic cylinder 1；Wherein, the hydraulic medium organization of supply is connected to each hydraulic cylinder 1
High-pressure balance valve 17 is equipped with rodless cavity branch road, and the control end of each high-pressure balance valve 17 is connected to corresponding institute
The rod chamber of hydraulic cylinder 1 is stated, balance branch is connected with the rodless cavity branch road between the high-pressure balance valve 17 and the hydraulic cylinder 1
Road, multiple balancing branchs communicate with each other.
As shown in figure 1, the hydraulic medium organization of supply include fuel tank 9, oil absorption filter 10, oil pump 11, pressure gauge 12,
Motor 8, return filter 7 and reversal valve 6 (with overflow effect), as shown in FIG., the hydraulic pressure is situated between specific annexation
Matter organization of supply is device commonly used in the art, is not specially limited herein.
Multiple hydraulic cylinders 1 are connected in parallel to each other, and connect and high-pressure balance valve 17 is equipped with the rodless cavity branch road of each hydraulic cylinder 1,
And multiple rodless cavity branch roads pass through multiple balancing branchs and connect, in rodless cavity pipeline oil return, when one of high-pressure balancing
Valve 17 because system clean degree reason occur in let out speed it is more obvious than other high-pressure balance valves 17 bigger than normal when, balancing branch can put down
The pressure of the multiple rodless cavity branch roads of weighing apparatus so that the piston rod of multiple hydraulic cylinders 1 can synchronously decline, in the support of multiple piston rods
Can cause that multiple strong points synchronously decline when same load, improve stability.
Further, each described balancing branch is provided with choke valve 18.Balancing branch is mainly to multiple rodless cavity branch roads
Play a part of balance pressure, rather than substantial amounts of delivery hydraulic pressure medium (hydraulic oil), therefore, setting can play throttling make
Choke valve 18.Preferably, choke valve 18 can be orifice plug.
In addition, the balancing branch is commonly connected to be provided with the pressure relief pipe of hand-operated direction valve 2 such that it is able to selectivity row
Go out hydraulic medium.In the case where the piston rod of hydraulic cylinder 1 is supported by load, when the oil supply system is due to originals such as unexpected power-off
During because of fuel cut-off, high-pressure balance valve 17 disconnects locking the piston rod of hydraulic cylinder 1.At this point it is possible to manual unlocking pressure relief pipe
Hand-operated direction valve 2, such that it is able to by the hydraulic oil in rodless cavity via rodless cavity branch road, balancing branch, pressure relief pipe discharge,
The presence of choke valve 18 can well limit the speed of draining, and pressure relief pipe can be connected to the hydraulic medium organization of supply
To reclaim the hydraulic oil of discharge.
Further, explosion-proof valve 16 is provided with the rodless cavity of the hydraulic cylinder 1, the explosion-proof valve 16 can be more than pre- level pressure
The function of the self-locking of oil cylinder 1 is realized in the case of difference.In the case where the piston rod of hydraulic cylinder 1 is supported by load, if wherein one
, for example, there is larger leakage or valve body fracture etc., the high-voltage flat now damaged in the auto-lock function failure of individual high-pressure balance valve 17
Can be considered open circuit at weighing apparatus valve 17, the supporting role of corresponding hydraulic cylinder 1 is failed (in the case of no explosion-proof valve 16), load for
The effect of other hydraulic cylinders 1 suddenly increases and promotes piston rod to be moved to rodless cavity with enormous pressure, and now explosion-proof valve 16 is opened
The dynamic position to lock the piston rod of each hydraulic cylinder 1, wherein the predetermined pressure difference is at least one of which high-pressure balance valve
During 17 failure in other hydraulic cylinders 1 rod chamber and rodless cavity pressure difference, this can as the case may be measure and set.
Specifically, the explosion-proof valve 16 has valve pocket and is connected to two ports of valve pocket, and being provided with the valve pocket can
Mobile diskware, the diskware can be moved and blocked as the port for exporting in the case of more than predetermined pressure difference.Anti-
In the case that the pressure difference of diskware both sides is not above the predetermined pressure difference in quick-fried valve 16, diskware can ensure two ports it
Between, two ports can communicate with each other to allow hydraulic oil to pass through the explosion-proof valve 16；And work as the pressure difference of diskware both sides more than described
During predetermined pressure difference, a port is moved and blocks the port diskware thereto under pressure, so as to disconnect pipeline company
Connect, realize locking action.
Further, throttle orifice is formed with the diskware, the throttle orifice can connect two ports.The throttling
Its size of hole is smaller, and after the diskware is by one of port lock, the throttle orifice can allow a small amount of logical of hydraulic oil
Cross, i.e., after the locking of explosion-proof valve 16 a small amount of hydraulic oil can be allowed to pass through, at this point it is possible to hand-operated direction valve 2 is opened, multiple liquid
Hydraulic oil in the rodless cavity of cylinder pressure 1 can lentamente be discharged via the pressure relief pipe, and the piston rod of hydraulic cylinder 1 can be slow
Retract on ground so that load lentamente declines.
As shown in fig. 6, two piston rods of hydraulic cylinder 1 are connected by connector 19, connector 19 can be crossbeam, so that
The piston rod of hydraulic cylinder 1 can synchronously stretch, also, hydraulic cylinder 1 has unloaded situation, now, the piston rod only company of support
Fitting 19 can substantially be considered as zero load.
In addition, the fluid pressure line that the oil supply system is connected to the rod chamber of multiple hydraulic cylinders 1 includes being connected in parallel to each other
Load pipeline and unloaded pipeline, the load pipeline and the unloaded pipeline are connected to the hydraulic medium by reversal valve 4
Organization of supply, multiple hydraulic pressure are communicated in optionally through load one of the pipeline and the unloaded pipeline
Cylinder 1, the piston rod of hydraulic cylinder 1 is connected as one group by connector described at least two of which, so that hydraulic cylinder 1 described in every group
The piston rod synchronously stretches, and each described unloaded pipeline of every group of hydraulic cylinder 1 includes being connected to each hydraulic cylinder 1
The unloaded branch road of rod chamber, is connected between the described unloaded branch road of hydraulic cylinder 1 described in every group by synchronous valve 3.
Wherein, every group of hydraulic cylinder 1 can be respectively supported at the diverse location of load, and connector 19 can be rigid horizontal stroke
Beam so that every group of piston rod synchronization telescope of hydraulic cylinder 1.The load pipeline and the unloaded pipeline are and are connected to rod chamber
Oil circuit, and be respectively used to the hydraulic pressure under load condition and Light Condition conveying.Especially, in the unloaded state, piston rod
More sensitive for oil pressure, the difference that the pressure difference in different hydraulic cylinders 1 has very little also results in flexible asynchronous of piston rod,
Therefore, it is connected between the unloaded branch road of same group of each hydraulic cylinder 1 and is connected by synchronous valve 3, between the unloaded branch road of balance
Pressure, thereby may be ensured that the piston rod of same group of hydraulic cylinder 1 can be with synchronization telescope.
Further, the balancing branch is connected with pressure-control valve 15, and the pressure-control valve can sense described without bar
Pressure in chamber, to control the switching of valve element.The pressure-control valve 15 can sense the pressure in the rodless cavity, to control to change
Load pipeline or the unloaded pipeline are selectively communicated with to valve 4.Hydraulic cylinder 1 is in rodless cavity under load and Light Condition
Pressure exist very big difference, therefore, it can the pressure change by pressure-control valve 15 in rodless cavity and selectively open
Load pipeline or the unloaded pipeline are opened, for example, when the pressure in rodless cavity is relatively larger, load pipeline can be opened, and
When pressure in rodless cavity is relatively smaller, unloaded pipeline can be opened.
In addition, the load pipeline includes that multiple is connected to the load branch of the rod chamber of each hydraulic cylinder 1, each load
Branch road is provided with hydraulic control one-way valve 14, and the pressure-control valve 16 is connected and controls the connection and disconnection of the hydraulic control one-way valve 14.
Here, pressure-control valve 16 can according to the pressure change of rod chamber control load pipeline and the opening of unloaded pipeline, and
Load pipeline can control hydraulic control one-way valve 14 when opening.
Further, the flow speed control valve 13 of control hydraulic medium flow velocity is provided with the load pipeline.Flow speed control valve 13 can be set
On the main line of load pipeline.In the loaded state, when decline is loaded, oil-feed in rod chamber, the decrease speed of load will
The significantly greater tnan rate of climb, it is therefore desirable to which the decrease speed to loading is limited, improves security, therefore in load pipeline
Middle setting flow speed control valve 13, the hydraulic pressure oil flow rate in limitation load pipeline.Correspondingly, limitation is not provided in unloaded pipeline
The part of flow velocity, can significantly improve the flow velocity of hydraulic oil, it is to avoid waste power output.
Especially, the piston rod of the hydraulic cylinder 1 supports load along gravity direction upwards and driving load is lifted, i.e. hydraulic pressure
Cylinder 1 is used to jacking and declines load.
As shown in Fig. 2 hydraulic cylinder 1 piston rod jacking load when, when " load jacking ", " pressure-control valve 15 " with
" hydraulic control one-way valve 14 " experiences oil pressure opening, and " pilot operated directional control valve 4 " commutation, hydraulic oil flows through hydraulic cylinder after high-pressure balance valve 17
After 1 rodless cavity, flow through successively hydraulic control one-way valve 14, flow speed control valve 13, pilot operated directional control valve 4, low-pressure balance valve 5, reversal valve 6, return
Oil strainer 7, fuel tank 9.
As shown in figure 3, when the piston rod of hydraulic cylinder 1 declines load, pressure-control valve 15 is experienced with hydraulic control one-way valve 14
Oil pressure is opened, and pilot operated directional control valve 4 commutates, and hydraulic oil is through low-pressure balance valve 5, pilot operated directional control valve 4, flow speed control valve 13, hydraulic control one-way valve
14th, hydraulic cylinder rod chamber, hydraulic cylinder rodless cavity, high-pressure balance valve 17, reversal valve 6, return filter 10, fuel tank 9.By speed governing
Valve 13 adjusts the decrease speed of hydraulic cylinder, and decrease speed is not higher than the function of the rate of climb when realizing load.
As shown in figure 4, during the unloaded jacking of hydraulic cylinder 1, because unloaded pressure is small, pressure-control valve 15 and hydraulic control one-way valve 14
It is not switched on, pilot operated directional control valve 4 does not commutate, hydraulic oil has through low-pressure balance valve 5, pilot operated directional control valve 4, synchronous valve 3, hydraulic cylinder 1
Rod cavity, the rodless cavity of hydraulic cylinder 1, high-pressure balance valve 17, reversal valve 6, return filter 7, fuel tank 9.
As shown in figure 5, when the zero load of hydraulic cylinder 1 declines, conversely, herein no longer shown in its hydraulic medium flowing direction and Fig. 4
Describe in detail.
In addition, present invention also offers a kind of tower crane, wherein, the tower crane includes the hydraulic system described in above scheme.
When installing or removing the tower body of tower crane, the multiple hydraulic cylinders 1 of the hydraulic system can be used for jack-up or decline as tower body group
Into the stock of unit, the installation or removal section by section of tower body are realized.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, but, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in range of the technology design of the invention, various letters can be carried out to technical scheme
Monotropic type, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means.In order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy is no longer separately illustrated.
Additionally, can also be combined between a variety of implementation methods of the invention, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (11)
1. a kind of hydraulic system, it is characterised in that the hydraulic system includes：
Multiple hydraulic cylinders (1)；
Hydraulic medium organization of supply, the hydraulic medium organization of supply is connected to multiple hydraulic cylinders (1) by fluid pressure line
Rod chamber and rodless cavity；
Wherein, the hydraulic medium organization of supply is connected on the rodless cavity branch road of each hydraulic cylinder (1) and is equipped with high pressure
Balanced valve (17), and each high-pressure balance valve (17) control end be connected to the corresponding hydraulic cylinder (1) have bar
Chamber, is connected with balancing branch on the rodless cavity branch road between the high-pressure balance valve (17) and the hydraulic cylinder (1), multiple described
Balancing branch communicates with each other.
2. hydraulic system according to claim 1, it is characterised in that each described balancing branch is provided with choke valve
(18)。
3. hydraulic system according to claim 2, it is characterised in that the choke valve (18) is orifice plug.
4. hydraulic system according to claim 2, it is characterised in that the balancing branch is commonly connected to be provided with and changes manually
To the pressure relief pipe of valve (2) such that it is able to optionally discharge hydraulic medium.
5. hydraulic system according to claim 4, it is characterised in that be provided with explosion-proof in the rodless cavity of the hydraulic cylinder (1)
Valve (16), the explosion-proof valve (16) can realize the hydraulic cylinder (1) self-locking in the case of more than predetermined pressure difference, described to prevent
The piston rod of hydraulic cylinder (1) is continued to move to.
6. hydraulic system according to claim 1, it is characterised in that the hydraulic medium organization of supply is connected to multiple institutes
Stating the fluid pressure line of the rod chamber of hydraulic cylinder (1) includes the load pipeline that is connected in parallel to each other and unloaded pipeline, the load pipeline and
The unloaded pipeline is connected to the hydraulic medium organization of supply by pilot operated directional control valve (4), with optionally through described negative
Carry one of pipeline and the unloaded pipeline and be communicated in multiple hydraulic cylinders (1), hydraulic cylinder described at least two of which
(1) piston rod is connected as one group by connector (19), so that the piston rod of hydraulic cylinder (1) is synchronously stretched described in every group
Contracting, each described unloaded pipeline of hydraulic cylinder (1) described in every group includes the sky of the rod chamber for being connected to each hydraulic cylinder (1)
Branch road is carried, is connected by synchronous valve (3) between the described unloaded branch road of hydraulic cylinder (1) described in every group.
7. hydraulic system according to claim 6, it is characterised in that the balancing branch is connected with pressure-control valve
(15), the pressure-control valve can sense the pressure in the rodless cavity, to control the switching of valve element.
8. hydraulic system according to claim 7, it is characterised in that the load pipeline is connected to each liquid including multiple
The load branch of the rod chamber of cylinder pressure (1), each load branch is provided with hydraulic control one-way valve (14), and the pressure-control valve (15) is even
Connect and control the hydraulic control one-way valve (14).
9. hydraulic system according to claim 6, it is characterised in that be provided with control hydraulic fluid flow in the load pipeline
The flow speed control valve (13) of speed.
10. the hydraulic system according to any one in claim 1-9, it is characterised in that the piston of the hydraulic cylinder (1)
Bar supports load upwards along gravity direction and driving load is lifted.
11. a kind of tower cranes, it is characterised in that the tower crane includes the hydraulic pressure system according to any one in claim 1-10
System.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611257893.3A CN106762883B (en) | 2016-12-30 | 2016-12-30 | Hydraulic system and tower crane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611257893.3A CN106762883B (en) | 2016-12-30 | 2016-12-30 | Hydraulic system and tower crane |
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| CN106762883A true CN106762883A (en) | 2017-05-31 |
| CN106762883B CN106762883B (en) | 2018-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611257893.3A Active CN106762883B (en) | 2016-12-30 | 2016-12-30 | Hydraulic system and tower crane |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107859663A (en) * | 2017-10-25 | 2018-03-30 | 成都弗格森液压机电有限公司 | The restraining device of redundant force in a kind of servo hydraulic system |
| CN108194457A (en) * | 2017-12-27 | 2018-06-22 | 中联重科股份有限公司 | Hydraulic jacking system and tower crane |
| CN110905890A (en) * | 2018-09-14 | 2020-03-24 | 湖南双达机电有限责任公司 | Cylinder control circuit and coiled tubing injector tower |
| CN111056334A (en) * | 2019-12-31 | 2020-04-24 | 龙合智能装备制造有限公司 | Self-adaptive loading platform for integral loading of container |
| CN115303968A (en) * | 2022-08-19 | 2022-11-08 | 岳阳鹏程建设集团有限公司 | A kind of tower ceiling section power failure protection device and protection method |
| CN115744670A (en) * | 2022-11-30 | 2023-03-07 | 徐州圣淮机械有限公司 | Anti-falling mechanism for jacking cross beam of tower crane |
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| CN102173363A (en) * | 2011-03-02 | 2011-09-07 | 长沙中联重工科技发展股份有限公司 | Jacking structure of tower crane and hydraulic system and jacking method thereof |
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| CN104528550A (en) * | 2014-12-03 | 2015-04-22 | 中联重科股份有限公司 | Crane counterweight lifting system |
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| JP2004316686A (en) * | 2003-04-11 | 2004-11-11 | Tcm Corp | Hydraulic device for loading vehicle |
| CN102173363A (en) * | 2011-03-02 | 2011-09-07 | 长沙中联重工科技发展股份有限公司 | Jacking structure of tower crane and hydraulic system and jacking method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107859663A (en) * | 2017-10-25 | 2018-03-30 | 成都弗格森液压机电有限公司 | The restraining device of redundant force in a kind of servo hydraulic system |
| CN108194457A (en) * | 2017-12-27 | 2018-06-22 | 中联重科股份有限公司 | Hydraulic jacking system and tower crane |
| CN110905890A (en) * | 2018-09-14 | 2020-03-24 | 湖南双达机电有限责任公司 | Cylinder control circuit and coiled tubing injector tower |
| CN111056334A (en) * | 2019-12-31 | 2020-04-24 | 龙合智能装备制造有限公司 | Self-adaptive loading platform for integral loading of container |
| CN115303968A (en) * | 2022-08-19 | 2022-11-08 | 岳阳鹏程建设集团有限公司 | A kind of tower ceiling section power failure protection device and protection method |
| CN115744670A (en) * | 2022-11-30 | 2023-03-07 | 徐州圣淮机械有限公司 | Anti-falling mechanism for jacking cross beam of tower crane |
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| Publication number | Publication date |
|---|---|
| CN106762883B (en) | 2018-07-13 |
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