CN107165881B - A kind of function integrated-type large-tonnage tower crane jacking cylinder and control oil circuit - Google Patents
A kind of function integrated-type large-tonnage tower crane jacking cylinder and control oil circuit Download PDFInfo
- Publication number
- CN107165881B CN107165881B CN201710601014.2A CN201710601014A CN107165881B CN 107165881 B CN107165881 B CN 107165881B CN 201710601014 A CN201710601014 A CN 201710601014A CN 107165881 B CN107165881 B CN 107165881B
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- oil
- valve
- cylinder
- rod chamber
- rodless cavity
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Classifications
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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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- 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
-
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
- F15B2013/006—Modular components with multiple uses, e.g. kits for either normally-open or normally-closed valves, interchangeable or reprogrammable manifolds
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Jib Cranes (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a kind of function integrated-type large-tonnage tower crane jacking cylinder and control oil circuits, including surveying the rodless cavity oil circuit that pressure exhaust joint forms, and the rod chamber oil circuit being made of cylinder rod chamber survey pressure exhaust joint, cylinder rod chamber safety valve, check valve I, throttle valve, check valve II by balanced valve, pipeline explosion-proof valve, oil cylinder rodless cavity safety valve, oil cylinder rodless cavity.Effect of the present invention is obvious, it is convenient to use, by being equipped with balanced valve in integrated control valve group, pipeline explosion-proof valve, safety valve, surveying pressure exhaust joint, check valve, throttle valve, and with pressure balance oil circuit and corresponding hydraulic fluid port, to reach, jacking cylinder integrated security, recycling speed regulation, survey pressure gas, pipeline is explosion-proof, balance locks, twin-tub pressure balance function, the security reliability to work under each operating condition of host is greatly improved, and versatility is more preferably.
Description
Technical field
The present invention relates to a kind of control oil circuits of hydraulic cylinder, belong to engineering machinery field, specifically a kind of function integrated-type
Large-tonnage tower crane jacking cylinder and control oil circuit.
Background technique
Currently, domestic is that the matched jacking cylinder of tower crane has thread cartridge balanced valve or outside inside cylinder bottom mostly
Mounting plate type balanced valve, and steel ball+bleed screw means of deflation is used in two chambers of oil cylinder.Said elements are only integrated with balance
Locking and the function of surveying pressure gas.For two cavity pressure of oil cylinder overload, balance defective valve or the explosion of oil cylinder external hose in work
When oil cylinder downslide out of control, when monitoring two chamber of oil cylinder operating pressure, adjust oil cylinder recycling speed, multi-cylinder synchronous jacking when pressure
Balancing function is not directed to and considers.Meanwhile the jacking cylinder being related to, it is mainly used for single cylinder jack-up system, it is same to multi-cylinder
Step jack-up system applicability is not strong, and there are limitations for application range.
Summary of the invention
In view of the above existing problems in the prior art, the present invention provides a kind of function integrated-type large-tonnage tower crane jacking cylinders
And control oil circuit, can integrated security, recycling speed regulation, survey explosion-proof pressure gas, pipeline, balance locking, twin-tub pressure balance function are
It is stronger to promote security reliability, the versatility to work under each operating condition of host for one.
To achieve the goals above, the technical solution adopted by the present invention is that: a kind of jacking of function integrated-type large-tonnage tower crane
The control oil circuit of oil cylinder, including surveyed pressure gas by balanced valve, pipeline explosion-proof valve, oil cylinder rodless cavity safety valve, oil cylinder rodless cavity and connect
Head composition rodless cavity control oil circuit, and by cylinder rod chamber survey pressure exhaust joint, cylinder rod chamber safety valve, check valve I,
The rod chamber that throttle valve, check valve II form controls oil circuit；The rodless cavity control oil circuit includes that oil inlet is connected to oil cylinder
The balanced valve of rodless cavity valve group oil inlet, the oil outlet of the balanced valve are connected to oil inlet and the pressure balance of pipeline explosion-proof valve
Hydraulic fluid port, the oil outlet of the pipeline explosion-proof valve is connected to oil cylinder rodless cavity safety valve oil inlet, oil cylinder rodless cavity is surveyed pressure gas and connect
Head oil inlet and oil cylinder rodless cavity oil inlet；The rod chamber control oil circuit includes the oil cylinder for being connected to the control mouth of balanced valve
Rod chamber valve group oil inlet, the rod chamber valve group oil inlet are additionally coupled to the oil inlet of check valve II and going out for check valve I
Hydraulic fluid port；The oil outlet of the check valve II is connected to the oil inlet of throttle valve, and the oil outlet of the throttle valve, which is connected to oil cylinder, to be had
Oil inlet, the cylinder rod chamber of rod cavity safety valve, which survey the oil inlet of pressure exhaust joint, the oil inlet of check valve I and oil cylinder, to be had
Rod cavity oil inlet；The oil outlet of the oil cylinder rodless cavity safety valve is connected to the oil outlet and safety valve of cylinder rod chamber safety valve
Oil return opening.
A kind of function integrated-type large-tonnage tower crane jacking cylinder, including jacking cylinder and integrated control valve group, the jacking
The rodless cavity of oil cylinder controls oil circuit, the rod chamber of the jacking cylinder by the rodless cavity that pipeline I is connected to integrated control valve group
Oil circuit is controlled by the rod chamber that pipeline II is connected to integrated control valve group.
Further, rodless cavity control oil circuit includes the balance that oil inlet is connected to oil cylinder rodless cavity valve group oil inlet
Valve, the oil outlet of the balanced valve are connected to the oil inlet and pressure balance hydraulic fluid port of pipeline explosion-proof valve, the pipeline explosion-proof valve
Oil outlet be connected to oil cylinder rodless cavity safety valve oil inlet, oil cylinder rodless cavity survey pressure exhaust joint oil inlet and oil cylinder rodless cavity into
Hydraulic fluid port.
Further, the described rod chamber control oil circuit include the control mouth for being connected to balanced valve cylinder rod chamber valve group into
Hydraulic fluid port, the rod chamber valve group oil inlet are additionally coupled to the oil inlet of check valve II and the oil outlet of check valve I；It is described unidirectional
The oil outlet of valve II is connected to the oil inlet of throttle valve, the oil outlet of the throttle valve be connected to cylinder rod chamber safety valve into
Hydraulic fluid port, cylinder rod chamber survey the oil inlet and cylinder rod chamber oil inlet of the oil inlet of pressure exhaust joint, check valve I；It is described
The oil outlet of oil cylinder rodless cavity safety valve is connected to the oil outlet and safety valve oil return opening of cylinder rod chamber safety valve.
The beneficial effects of the present invention are: by be equipped in integrated control valve group balanced valve, pipeline explosion-proof valve, safety valve,
Survey pressure exhaust joint, check valve, throttle valve, and with pressure balance oil circuit and corresponding hydraulic fluid port, with reach jacking cylinder integrated security,
Recycling speed regulation, survey pressure gas, pipeline is explosion-proof, balance locks, twin-tub pressure balance function, greatly improves under each operating condition of host
The security reliability of work, and versatility is more preferably.
Detailed description of the invention
Fig. 1 is hydraulic principle figure structure schematic representation of the present invention；
Fig. 2 is schematic structural view of the invention；
Fig. 3 is structure of the invention top view.
In figure: 1, balanced valve, 2, pipeline explosion-proof valve, 3, oil cylinder rodless cavity safety valve, 4, oil cylinder rodless cavity survey pressure gas connect
Head, 5, jacking cylinder, 6, cylinder rod chamber survey pressure exhaust joint, 7, cylinder rod chamber safety valve, 8, check valve I, 9, throttling
Valve, 10, check valve II, 11, pipeline II, 12, pipeline I, 13, integrated control valve group, A1, oil cylinder rodless cavity valve group oil inlet,
A2, pressure balance hydraulic fluid port, B, cylinder rod chamber valve group oil inlet, Y, safety valve oil return opening, C, oil cylinder rodless cavity oil inlet, D, oil
Cylinder rod chamber oil inlet.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
As shown in Figure 1, a kind of control oil circuit of function integrated-type large-tonnage tower crane jacking cylinder, including by balanced valve 1, pipe
Road explosion-proof valve 2, oil cylinder rodless cavity safety valve 3, oil cylinder rodless cavity survey the rodless cavity that pressure exhaust joint 4 forms and control oil circuit, and
Pressure exhaust joint 6, cylinder rod chamber safety valve 7, check valve I 8, throttle valve 9, check valve II 10 is surveyed by cylinder rod chamber to form
Rod chamber controls oil circuit；The rodless cavity control oil circuit includes that oil inlet is connected to the flat of oil cylinder rodless cavity valve group oil inlet A1
Weigh valve 1, and the oil outlet of the balanced valve 1 is connected to the oil inlet and pressure balance hydraulic fluid port A2 of pipeline explosion-proof valve 2, and the pipeline is anti-
The oil outlet of quick-fried valve 2 is connected to the oil inlet of oil cylinder rodless cavity safety valve 3, oil cylinder rodless cavity surveys the oil inlet of pressure exhaust joint 4
And oil cylinder rodless cavity oil inlet C；The rod chamber control oil circuit includes the cylinder rod chamber valve for being connected to 1 control mouth of balanced valve
Group oil inlet B, the cylinder rod chamber valve group oil inlet B are additionally coupled to the oil inlet of check valve II 10 and going out for check valve I 8
Hydraulic fluid port；The oil outlet of the check valve II 10 is connected to the oil inlet of throttle valve 9, and the oil outlet of the throttle valve 9 is connected to oil
The oil inlet of cylinder rod chamber safety valve 7, cylinder rod chamber survey the oil inlet of pressure exhaust joint 6, check valve I 8 oil inlet and
Cylinder rod chamber oil inlet D；The oil outlet of the oil cylinder rodless cavity safety valve 3 is connected to the fuel-displaced of cylinder rod chamber safety valve 7
Mouth and safety valve oil return opening Y.
As shown in Figures 2 and 3, a kind of function integrated-type large-tonnage tower crane jacking cylinder, including jacking cylinder 5 and integrated control
Valve group 13 processed, the rodless cavity of the jacking cylinder 5 are connected to the rodless cavity control oil of integrated control valve group 13 by pipeline I 12
The rod chamber on road, the jacking cylinder 5 controls oil circuit by the rod chamber that pipeline II 11 is connected to integrated control valve group.
Further, rodless cavity control oil circuit includes that oil inlet is connected to the flat of oil cylinder rodless cavity valve group oil inlet A1
Weigh valve 1, and the oil outlet of the balanced valve 1 is connected to the oil inlet and pressure balance hydraulic fluid port A2 of pipeline explosion-proof valve 2, and the pipeline is anti-
The oil outlet of quick-fried valve 2 is connected to the oil inlet of oil cylinder rodless cavity safety valve 3, oil cylinder rodless cavity surveys the oil inlet of pressure exhaust joint 4
And oil cylinder rodless cavity oil inlet C.
Further, the described rod chamber control oil circuit include be connected to the cylinder rod chamber valve group of 1 control mouth of balanced valve into
Hydraulic fluid port B, the cylinder rod chamber valve group oil inlet B be additionally coupled to check valve II 10 oil inlet and check valve I 8 it is fuel-displaced
Mouthful；The oil outlet of the check valve II 10 is connected to the oil inlet of throttle valve 9, and the oil outlet of the throttle valve 9 is connected to oil cylinder
Oil inlet, the cylinder rod chamber of rod chamber safety valve 7 survey the oil inlet and oil of the oil inlet of pressure exhaust joint 6, check valve I 8
Cylinder rod chamber oil inlet D；The oil outlet of the oil cylinder rodless cavity safety valve 3 is connected to the oil outlet of cylinder rod chamber safety valve 7
And safety valve oil return opening Y.
Working condition of the present invention is as follows:
Stretching state: working media passes through oil cylinder rodless cavity valve group oil inlet A1, balanced valve 1, pipeline explosion-proof valve 2, oil cylinder
Rodless cavity oil inlet C enters the rodless cavity of jacking cylinder 5, and driving jacking cylinder 5 stretches out；The work of the rod chamber of jacking cylinder 5
Medium is flowed out by cylinder rod chamber safety valve 7 and cylinder rod chamber valve group oil inlet B.At this point, oil cylinder rodless cavity safety valve 3 rises
Safeguard protection effect；Oil cylinder rodless cavity surveys pressure exhaust joint 4 for the operating pressure of real-time monitoring oil cylinder rodless cavity and discharge oil
The air contained in cylinder two cavity oil liquid；When multi-cylinder synchronous stretching may be implemented in pressure balance hydraulic fluid port A2, the rodless cavity of every oil cylinder
Pressure is consistent, is conducive to the synchronization of jacking up and decline of oil cylinder.
Retracted state: working media has by cylinder rod chamber valve group oil inlet B, check valve II 10, throttle valve 9, oil cylinder
Rod cavity oil inlet D enters the rod chamber of jacking cylinder 5, and driving jacking cylinder 5 bounces back；The work of the rodless cavity of jacking cylinder 5 is situated between
Matter is by pipeline explosion-proof valve 2, balanced valve 1, oil cylinder rodless cavity valve group oil inlet A1 outflow.At this point, check valve II 10 and throttle valve 9
Speed adjustment unit is formed, the recycling speed of adjustable jacking cylinder 5, cylinder rod chamber safety valve 7 play safeguard protection, oil cylinder
Rod chamber surveys pressure exhaust joint 6 for containing in the operating pressure of 5 rod chamber of real-time monitoring jacking cylinder and discharge rod chamber oil liquid
Some air, balanced valve 1, which serve, prevents oil cylinder from declining " stall ".In addition, pipeline explosion-proof valve 2 can when balanced valve 1 fails
The rodless cavity of locked jacking cylinder 5 controls oil circuit, prevents the downslide out of control of jacking cylinder 5.
Halted state: the rodless cavity of jacking cylinder 5 is balanced valve 1 and locks, and guarantees what jacking cylinder 5 stopped at an arbitrary position
It is reliable and stable.
In conclusion effect of the present invention is obvious, it is easy to use, by being equipped with balanced valve, pipeline in integrated control valve group
Explosion-proof valve, safety valve survey pressure exhaust joint, check valve, throttle valve, and with pressure balance oil circuit and corresponding hydraulic fluid port, to reach top
Oil-lifting jar integrated security, recycling speed regulation, survey pressure gas, pipeline is explosion-proof, balance locks, twin-tub pressure balance function, greatly mentions
The security reliability to work under each operating condition of host is risen, and versatility is more preferably.
Claims (2)
1. a kind of control oil circuit of function integrated-type large-tonnage tower crane jacking cylinder, which is characterized in that including by balanced valve (1),
The rodless cavity that pipeline explosion-proof valve (2), oil cylinder rodless cavity safety valve (3), oil cylinder rodless cavity survey pressure exhaust joint (4) composition controls oil
Road, and by cylinder rod chamber survey pressure exhaust joint (6), cylinder rod chamber safety valve (7), check valve I (8), throttle valve (9),
The rod chamber of check valve II (10) composition controls oil circuit；The rodless cavity control oil circuit includes that oil inlet is connected to oil cylinder rodless
The oil outlet of the balanced valve (1) of chamber valve group oil inlet (A1), the balanced valve (1) is connected to the oil inlet of pipeline explosion-proof valve (2)
The oil inlet of oil cylinder rodless cavity safety valve (3) is connected to the oil outlet of pressure balance hydraulic fluid port (A2), the pipeline explosion-proof valve (2)
Mouth, oil cylinder rodless cavity survey the oil inlet and oil cylinder rodless cavity oil inlet (C) of pressure exhaust joint (4)；The rod chamber controls oil
Road includes the cylinder rod chamber valve group oil inlet (B) for being connected to balanced valve (1) control mouth, the cylinder rod chamber valve group oil inlet
(B) oil inlet of check valve II (10) and the oil outlet of check valve I (8) are additionally coupled to；The check valve II (10) it is fuel-displaced
Mouth is connected to the oil inlets of throttle valve (9), the oil outlet of the throttle valve (9) be connected to cylinder rod chamber safety valve (7) into
Hydraulic fluid port, cylinder rod chamber survey the oil inlet and cylinder rod chamber oil inlet of the oil inlet of pressure exhaust joint (6), check valve I (8)
(D)；The oil outlet of the oil cylinder rodless cavity safety valve (3) is connected to the oil outlet and safety valve of cylinder rod chamber safety valve (7)
Oil return opening (Y).
2. a kind of function integrated-type large-tonnage tower crane jacking cylinder, which is characterized in that use a kind of function described in claim 1
The control oil circuit of integrated-type large-tonnage tower crane jacking cylinder, and including jacking cylinder (5) and integrated control valve group (12), the top
The rodless cavity of oil-lifting jar (5) controls oil circuit, the jacking by the rodless cavity that pipeline I (13) is connected to integrated control valve group (12)
The rod chamber of oil cylinder (5) controls oil circuit by the rod chamber that pipeline II (11) is connected to integrated control valve group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710601014.2A CN107165881B (en) | 2017-07-21 | 2017-07-21 | A kind of function integrated-type large-tonnage tower crane jacking cylinder and control oil circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710601014.2A CN107165881B (en) | 2017-07-21 | 2017-07-21 | A kind of function integrated-type large-tonnage tower crane jacking cylinder and control oil circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107165881A CN107165881A (en) | 2017-09-15 |
| CN107165881B true CN107165881B (en) | 2019-03-15 |
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| CN201710601014.2A Active CN107165881B (en) | 2017-07-21 | 2017-07-21 | A kind of function integrated-type large-tonnage tower crane jacking cylinder and control oil circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109555743B (en) * | 2018-12-11 | 2020-05-22 | 中联重科股份有限公司 | Control system for oil cylinder and engineering machinery |
| CN109595210A (en) * | 2018-12-26 | 2019-04-09 | 河海大学常州校区 | A kind of explosion-proof valve module of Combined oil cylinder |
| CN112443534A (en) * | 2020-12-10 | 2021-03-05 | 徐州徐工液压件有限公司 | Cylinder valve integrated type standardized heavy-load lifting oil cylinder structure |
| CN113251012A (en) * | 2021-06-04 | 2021-08-13 | 萨驰智能装备股份有限公司 | Explosion-proof hydraulic system and tire vulcanizer |
| CN113803324B (en) * | 2021-08-16 | 2024-09-03 | 南京智真电子科技股份有限公司 | Self-locking oil cylinder with balance valve locked at two ends |
| CN114212721B (en) * | 2021-12-13 | 2024-06-07 | 徐州徐工液压件有限公司 | Combined control valve with emergency lowering function and capable of preventing damage to jacking sleeve frame of tower crane |
| CN115263838B (en) * | 2022-07-29 | 2024-10-01 | 徐州徐工液压件有限公司 | But three jar synchronization tower machine jacking hydraulic system of convenient control |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1560482A (en) * | 2004-03-12 | 2005-01-05 | 浙江大学 | Hydraulic propelling system for mining tunnel driving machine controlled by ratio flow pressure |
| DE102004063044A1 (en) * | 2004-12-22 | 2006-07-06 | Sauer-Danfoss Aps | Hydraulic control |
| CN201317632Y (en) * | 2008-10-23 | 2009-09-30 | 泰安市硕力液压设备厂 | Emergency pressure relief device for tower crane hydraulic jacking system |
| CN101625002A (en) * | 2008-07-12 | 2010-01-13 | 邵阳维克液压有限责任公司 | Hydraulic control system of lifting cylinders of mobile stage vehicle |
| CN102588365A (en) * | 2012-03-13 | 2012-07-18 | 徐州重型机械有限公司 | Double-cylinder synchronous control hydraulic system and engineering machinery |
| CN102824938A (en) * | 2012-08-23 | 2012-12-19 | 南京西普水泥工程集团有限公司 | Hydraulic turning device for vertical mill |
| CN102979772A (en) * | 2012-12-10 | 2013-03-20 | 徐州重型机械有限公司 | Oil cylinder locking device, double-cylinder hydraulic control system and lifting equipment |
| CN103362884A (en) * | 2012-04-01 | 2013-10-23 | 迪斯油压工业(昆山)有限公司 | Hydraulic lifting control device |
| CN104564859A (en) * | 2013-10-21 | 2015-04-29 | 湖北华舟重工应急装备股份有限公司 | Hydraulic control system of three-dimensional adjusting machine |
| CN105221500A (en) * | 2015-10-22 | 2016-01-06 | 浙江大学 | The TBM rear support hydraulic system of single double pump pattern switching and pressurize |
-
2017
- 2017-07-21 CN CN201710601014.2A patent/CN107165881B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1560482A (en) * | 2004-03-12 | 2005-01-05 | 浙江大学 | Hydraulic propelling system for mining tunnel driving machine controlled by ratio flow pressure |
| DE102004063044A1 (en) * | 2004-12-22 | 2006-07-06 | Sauer-Danfoss Aps | Hydraulic control |
| CN101625002A (en) * | 2008-07-12 | 2010-01-13 | 邵阳维克液压有限责任公司 | Hydraulic control system of lifting cylinders of mobile stage vehicle |
| CN201317632Y (en) * | 2008-10-23 | 2009-09-30 | 泰安市硕力液压设备厂 | Emergency pressure relief device for tower crane hydraulic jacking system |
| CN102588365A (en) * | 2012-03-13 | 2012-07-18 | 徐州重型机械有限公司 | Double-cylinder synchronous control hydraulic system and engineering machinery |
| CN103362884A (en) * | 2012-04-01 | 2013-10-23 | 迪斯油压工业(昆山)有限公司 | Hydraulic lifting control device |
| CN102824938A (en) * | 2012-08-23 | 2012-12-19 | 南京西普水泥工程集团有限公司 | Hydraulic turning device for vertical mill |
| CN102979772A (en) * | 2012-12-10 | 2013-03-20 | 徐州重型机械有限公司 | Oil cylinder locking device, double-cylinder hydraulic control system and lifting equipment |
| CN104564859A (en) * | 2013-10-21 | 2015-04-29 | 湖北华舟重工应急装备股份有限公司 | Hydraulic control system of three-dimensional adjusting machine |
| CN105221500A (en) * | 2015-10-22 | 2016-01-06 | 浙江大学 | The TBM rear support hydraulic system of single double pump pattern switching and pressurize |
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| Publication number | Publication date |
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| CN107165881A (en) | 2017-09-15 |
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