CN106246632A - The spud leg fast lifting hydraulic circuit of hydraulic bolt formula jacking system - Google Patents
The spud leg fast lifting hydraulic circuit of hydraulic bolt formula jacking system Download PDFInfo
- Publication number
- CN106246632A CN106246632A CN201610827256.9A CN201610827256A CN106246632A CN 106246632 A CN106246632 A CN 106246632A CN 201610827256 A CN201610827256 A CN 201610827256A CN 106246632 A CN106246632 A CN 106246632A
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- Prior art keywords
- valve
- hydraulic
- circuit
- cylinder group
- spud leg
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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
- 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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
- E02B17/08—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering
- E02B17/0809—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering the equipment being hydraulically actuated
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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
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
-
- 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
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
-
- 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
- F15B2013/004—Cartridge valves
-
- 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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
- F15B2013/0448—Actuation by solenoid and permanent magnet
-
- 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
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20507—Type of prime mover
- F15B2211/20515—Electric motor
-
- 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
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20576—Systems with pumps with multiple pumps
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The present invention relates to the spud leg fast lifting hydraulic circuit of a kind of hydraulic bolt formula jacking system, including motor, hydraulic pump, electromagnetic relief valve, hoist cylinder group, described hoist cylinder group has rod chamber oil circuit and rodless cavity oil circuit, it is connected electromagnetic relief valve between described rod chamber oil circuit and rodless cavity oil circuit and forms differential regenerative circuit, realize the differential rapid movement of hoist cylinder group, improve the speed of lifting spud leg.The hydraulic lifting loop that the present invention uses, when lifting spud leg, differential regenerative circuit between hoist cylinder group rod chamber oil circuit and hoist cylinder group rodless cavity oil circuit, will be formed, improve the speed of lifting spud leg, maximize the ability playing hydraulic circuit, shorten lifting platform total time.
Description
Technical field
The present invention relates to a kind of hydraulic bolt formula jacking system, a kind of liquid for hydraulic bolt formula jacking system
Push back road.
Background technology
Hydraulic bolt formula jacking system is applicable to the platform that need to frequently lift and rate request is higher.The liter of its hydraulic system
Dropping back to road and include the parts such as hydraulic oil source, lift valve group, hoist cylinder group, hydraulic oil source is real by controlling lift valve group electromagnetic valve
Existing lifting action.
In existing jacking system hydraulic lifting loop, when hoist cylinder group piston rod stretches out, hydraulic oil source fluid enters
Hoist cylinder group rodless cavity, hoist cylinder group rod chamber fluid oil sump tank, hoist cylinder group piston rod maximum is stretched out speed and is depended on
In current hydraulic oil source flux and lifting oil, the area ratio of cylinder group rodless cavity；When hoist cylinder group piston rod is retracted, hydraulic oil
Source fluid enters hoist cylinder group rod chamber, hoist cylinder group rodless cavity fluid oil sump tank, and hoist cylinder group piston rod maximum contracts
Return speed and depend on the area ratio of current hydraulic oil source flux and hoist cylinder group rod chamber.When system typically presses hoistable platform
Hoist cylinder group piston rod maximum stretch out speed correspondence loop needed for maximum stream flow to determine elevating loop hydraulic pump specification, lifting
Maximal rate when spud leg speed is hydraulic pump delivery fuel feeding, usually slightly larger than hoistable platform speed；System installed power root
Determine according to a liter platform, fall platform, liter spud leg, different lower the consumed peak power of operating mode such as fall spud leg, ballast etc..
Deep-sea is constantly being pushed in current ocean development to, and the platform operations depth of water is continuously increased, and directly increases system lifting column
Time needed for lower limb operating mode.Using existing hydraulic lifting circuit type, if wanting to accelerate the speed of lifting spud leg, can only additionally increase
Big hydraulic oil source flow, corresponding all elements, adnexa specification are all by increase.If still using existing hydraulic lifting circuit type
Realize spud leg lifting action, along with the platform operations depth of water is continuously increased, the substantial increase of lifting platform total time will be caused.
Summary of the invention
In order to shorten lifting spud leg holding time, improve the utilization rate of hydraulic circuit ability, accelerate the speed of lifting spud leg,
The present invention provides the spud leg fast lifting hydraulic circuit of a kind of hydraulic bolt formula jacking system, applies this hydraulic lifting loop oneself
Lift-type platform, lifting spud leg speed faster, effectively reduces the total time of lifting spud leg.
For achieving the above object, the technical scheme is that the spud leg of a kind of hydraulic bolt formula jacking system quickly rises
Fall hydraulic circuit, including motor, hydraulic pump, electromagnetic relief valve, hoist cylinder group, described hoist cylinder group has rod chamber oil circuit
With rodless cavity oil circuit, it is connected electromagnetic relief valve between described rod chamber oil circuit and rodless cavity oil circuit and forms differential regenerative circuit, real
The differential rapid movement of existing hoist cylinder group, improves the speed of lifting spud leg, shortens lifting platform total time.
Described hydraulic pump oil-in is connected with fuel tank, and hydraulic pump oil-out is by check valve and the first electromagnetic relief valve and height
Press through filter to be connected；High pressure filter outlet is connected with an O type function three-position four-way valve, the 2nd O type function three-position four-way valve；
Oneth O type function three-position four-way valve and the second electromagnetic relief valve, shuttle valve, guide's hydraulic fluid port of balanced valve, hoist cylinder group have bar
Chamber oil circuit is connected；Oneth O type function three-position four-way valve is also connected with the 2nd O type function three-position four-way valve, the 2nd O type function three
Cross valve is connected with the rodless cavity oil circuit of hoist cylinder group by balanced valve；Second electromagnetic relief valve is by balanced valve and lifting oil
The rodless cavity oil circuit of cylinder group is connected.
Described hoist cylinder group comprises multiple hoist cylinders parallel with one another and cylinder ports valve group.Described motor and hydraulic pump
At least two sets.Described balanced valve is made up of multiple balanced valve parallel connections.Two described O type function three-position four-way valves are patrolled by plug-in
Collect valve to combine.
The invention has the beneficial effects as follows:
The hydraulic lifting loop that the present invention uses, when lifting spud leg, by hoist cylinder group rod chamber oil circuit and
Form differential regenerative circuit between hoist cylinder group rodless cavity oil circuit, improve the speed of lifting spud leg, maximize and play liquid
Push back the ability on road, shorten lifting platform total time.
Accompanying drawing explanation
Fig. 1 is the spud leg fast lifting hydraulic circuit diagram of the hydraulic bolt formula jacking system of the present invention；
Fig. 2 is the oil supply system figure of the spud leg fast lifting hydraulic circuit of the hydraulic bolt formula jacking system of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing 1, Fig. 2, a specific embodiment of the present invention is described in further detail.
Such as Fig. 1, shown in 2, the present invention provides a kind of spud leg fast lifting hydraulic pressure being applied to hydraulic bolt formula jacking system
Loop.This hydraulic circuit includes: motor 1, hydraulic pump 2, check valve the 3, first electromagnetic relief valve 4, high pressure filter 5, cooler
6, return filter 7, fuel tank the 8, the oneth O type function three-position four-way valve the 9, the 2nd 0 type function three-position four-way valve the 10, second electromagnetism overflow
Stream valve 11, shuttle valve 12, balanced valve 13, hoist cylinder group 14.
In the present embodiment, hydraulic pump 2 oil-in is connected with fuel tank 8, and hydraulic pump 2 oil-out is connected with check valve 3 import；Single
Export to valve 3 and be connected with the A mouth of the first electromagnetic relief valve 4, the P mouth of high pressure filter 5；The T mouth of high pressure filter 5 and an O
The P mouth of type function three-position four-way valve 9, the P mouth of the 2nd 0 type function three-position four-way valve 10 are connected；Oneth O type function 3-position 4-way
The A mouth of valve 9 and the A mouth of the second electromagnetic relief valve 11,121 mouthfuls of shuttle valve 12, balanced valve 13 guide's hydraulic fluid port X mouth, hoist cylinder group
The rod chamber oil circuit of 14 is connected；The B mouth of the oneth O type function three-position four-way valve 9 and the B of the 2nd O type function three-position four-way valve 10
Mouth, the B mouth of the second electromagnetic relief valve 11,123 mouthfuls of shuttle valve 12, the A mouth of balanced valve 13 is connected；The elder generation of the second electromagnetic relief valve 11
1 22 mouthfuls of oil diverting port X mouth and shuttle valve 12 are connected；The B mouth of balanced valve 13 is connected with hoist cylinder group 14 rodless cavity oil circuit；Second
Guide's drain tap Y mouth of electromagnetic relief valve 11 and the T mouth of an O type function three-position four-way valve 9, the 2nd 0 type function 3-position 4-way
The T mouth of valve 10, the B mouth of the first electromagnetic relief valve 4, cooler 6 hot oil inlet are connected；The outlet of cooler 6 cold oil and oil return filter
Device 7 entrance is connected；Oil return cooler 7 exports and is connected with fuel tank 8；Hoist cylinder group 14 comprises multiple hoist cylinders parallel with one another
With cylinder ports valve group；Balanced valve 13, according to real system flow, can use multiple balanced valve in parallel；Motor 1 and hydraulic pump 2 are at least
It is two sets.
In Fig. 1, after starting motor 1, the first electromagnetic relief valve 4 obtains electric, and loop starts to build pressure, when loop reaches rated pressure
After, system possesses operation condition.Concrete action control sees Fig. 2.
Rising platform operating mode: when item rises platform, the one 0 type function three-position four-way valve 9 electric magnet DT2 obtains electric, pressure oil flows to
The B mouth of the one 0 type function three-position four-way valve 9, enters hoist cylinder group 14 rodless cavity oil circuit by balanced valve 13；Hoist cylinder group
14 rod chamber oil circuit fluid flow to the T mouth oil return of an O type function three-position four-way valve 9.During backhaul, the one 0 type function three four
Logical valve 9 electric magnet DT3 obtains electric, and pressure oil flows to the A mouth of an O type function three-position four-way valve 9, and entering hoist cylinder group 14 has bar
Chamber oil circuit；Hoist cylinder group 14 after balanced valve 13 reversely throttles, flows to the one 0 type function three four without stalk chamber oil circuit fluid
The T mouth oil return of logical valve 9.
During fall platform, the one 0 type function three-position four-way valve 9 electric magnet DT3 obtains electric, and pressure oil flows to the one 0 type function three
The A mouth of position four-way valve 9, enters hoist cylinder group 14 rod chamber oil circuit；Hoist cylinder group 14 rodless cavity oil circuit fluid is through overbalance
After valve 13 reversely throttles, flow to the T mouth oil return of an O type function three-position four-way valve 9.During backhaul, the 2nd O type function 3-position 4-way
Valve 10 electric magnet DT4, the second electromagnetic relief valve 11 electric magnet DT6 obtain electric, and pressure oil flows to the 2nd O type function three-position four-way valve 10
B mouth, enter hoist cylinder group 14 rodless cavity oil circuit by balanced valve 13；Hoist cylinder group 14 rod chamber oil circuit fluid is through
Two electromagnetic relief valve 11(directly connect) enter hoist cylinder group 14 rodless cavity oil circuit afterwards, form differential regenerative circuit.
When rising spud leg, the one 0 type function three-position four-way valve 9 electric magnet DT3 obtains electric, and pressure oil flows to an O type function three
The A mouth of position four-way valve 9, enters hoist cylinder group 14 rod chamber oil circuit；Hoist cylinder group 14 rodless cavity oil circuit fluid is through overbalance
After valve 13 reversely throttles, flow to the T mouth oil return of an O type function three-position four-way valve 9.During backhaul, the 2nd O type function 3-position 4-way
Valve 10 electric magnet DT4, the second electromagnetic relief valve 11 electric magnet DT6 obtain electric, and pressure oil flows to the 2nd O type function three-position four-way valve
The B mouth of 10, enters hoist cylinder group 14 rodless cavity oil circuit by balanced valve 13；Hoist cylinder group 14 rod chamber oil circuit fluid passes through
Second electromagnetic relief valve 11(directly connects) enter hoist cylinder group 14 rodless cavity oil circuit afterwards, form regeneration differential circuit.
During fall spud leg, the 2nd O type function three-position four-way valve 10 electric magnet DT4, the second electromagnetic relief valve 11
Electric magnet DT7 obtains electric, and pressure oil flows to the B mouth of the 2nd O type function three-position four-way valve 10, enters lifting by balanced valve 13
Oil cylinder group 14 rodless cavity oil circuit；Hoist cylinder group 14 rod chamber oil circuit fluid enters after the second electromagnetic relief valve 11 overflow and rises
Fall oil cylinder group 14 rodless cavity oil circuit, forms regeneration differential circuit.During backhaul, an O type function three-position four-way valve 9 electric magnet DT3
Obtaining electric, pressure oil flows to the A mouth of an O type function three-position four-way valve 9, enters hoist cylinder group 14 rod chamber oil circuit；Lifting oil
Cylinder group 14 rodless cavity oil circuit fluid is after balanced valve 13 reversely throttles, and the T mouth flowing to an O type function three-position four-way valve 9 returns
Oil.
The core of the present invention is by controlling the second electromagnetic relief valve 11 between hoist cylinder group 14 two cavity oil road, it is achieved
The differential rapid movement of hoist cylinder group 14.Its protection domain is not limited to above-described embodiment, every in the scope of the present invention and
The change made in spirit, equivalent, deformation, all should be in the range of the claim of the present invention and equivalent technologies.
Claims (6)
1. a spud leg fast lifting hydraulic circuit for hydraulic bolt formula jacking system, including motor (1), hydraulic pump (2), electromagnetism
Overflow valve, hoist cylinder group (14), it is characterised in that: described hoist cylinder group (14) has rod chamber oil circuit and rodless cavity oil
Road, is connected electromagnetic relief valve between described rod chamber oil circuit and rodless cavity oil circuit and forms differential regenerative circuit, it is achieved hoist cylinder
The differential rapid movement of group (14), improves the speed of lifting spud leg, shortens lifting platform total time.
The spud leg fast lifting hydraulic circuit of hydraulic bolt formula jacking system the most according to claim 1, it is characterised in that:
Described hydraulic pump (2) oil-in is connected with fuel tank (8), and hydraulic pump (2) oil-out is by check valve (3) and the first electromagnetic relief valve
(4) it is connected with high pressure filter (5)；High pressure filter (5) outlet and O type function three-position four-way valve (9), the 2nd O type machine
Can be connected by three-position four-way valve (10)；Oneth O type function three-position four-way valve (9) and the second electromagnetic relief valve (11), shuttle valve (12), flat
Guide's hydraulic fluid port of weighing apparatus valve (13), the rod chamber oil circuit of hoist cylinder group (14) are connected；Oneth O type function three-position four-way valve (9) is also
Being connected with the 2nd O type function three-position four-way valve (10), the 2nd O type function three-position four-way valve (10) is by balanced valve (13) and lifting
The rodless cavity oil circuit of oil cylinder group (14) is connected；Second electromagnetic relief valve (11) is by balanced valve (13) and hoist cylinder group (14)
Rodless cavity oil circuit is connected.
The spud leg fast lifting hydraulic circuit of hydraulic bolt formula jacking system the most according to claim 1, it is characterised in that:
Described hoist cylinder group (14) comprises multiple hoist cylinders parallel with one another and cylinder ports valve group.
The spud leg fast lifting hydraulic circuit of hydraulic bolt formula jacking system the most according to claim 1, it is characterised in that:
Described motor (1) and hydraulic pump (2) at least two overlaps.
The spud leg fast lifting hydraulic circuit of hydraulic bolt formula jacking system the most according to claim 2, it is characterised in that:
Described balanced valve (13) is made up of multiple balanced valve parallel connections.
The spud leg fast lifting hydraulic circuit of hydraulic bolt formula jacking system the most according to claim 2, it is characterised in that:
Two described O type function three-position four-way valves are combined by plug-in logical valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610827256.9A CN106246632B (en) | 2016-09-18 | 2016-09-18 | The spud leg fast lifting hydraulic circuit of hydraulic bolt formula jacking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610827256.9A CN106246632B (en) | 2016-09-18 | 2016-09-18 | The spud leg fast lifting hydraulic circuit of hydraulic bolt formula jacking system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106246632A true CN106246632A (en) | 2016-12-21 |
| CN106246632B CN106246632B (en) | 2017-12-15 |
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ID=57598759
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610827256.9A Active CN106246632B (en) | 2016-09-18 | 2016-09-18 | The spud leg fast lifting hydraulic circuit of hydraulic bolt formula jacking system |
Country Status (1)
| Country | Link |
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| CN (1) | CN106246632B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018152971A1 (en) * | 2017-02-21 | 2018-08-30 | 深圳市凯卓立液压设备股份有限公司 | Rapid lifting hydraulic device |
| CN108488112A (en) * | 2018-05-16 | 2018-09-04 | 南通润邦重机有限公司 | large-flow hydraulic system differential circuit and its control method |
| CN108569655A (en) * | 2017-09-15 | 2018-09-25 | 中国国际海运集装箱(集团)股份有限公司 | A kind of lifting hydraulic control system, control method and connecting bridge |
| CN109322882A (en) * | 2018-12-04 | 2019-02-12 | 大连华锐重工集团股份有限公司 | A kind of hydraulic power unit and its control method of bolt-type ocean lifting platform |
| CN109973449A (en) * | 2019-03-01 | 2019-07-05 | 武汉船用机械有限责任公司 | The hydraulic control system of hoistable platform |
| CN110529450A (en) * | 2019-08-14 | 2019-12-03 | 杭州国辰正域科技有限公司 | Big flow low power consumption high-precision hydraulic speed regulation system based on differential principle before valve |
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| CN206159154U (en) * | 2016-09-18 | 2017-05-10 | 上海衡拓船舶设备有限公司 | Hydraulic pressure bolt formula operating system's spud leg hydraulic circuit that goes up and down fast |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018152971A1 (en) * | 2017-02-21 | 2018-08-30 | 深圳市凯卓立液压设备股份有限公司 | Rapid lifting hydraulic device |
| CN108569655A (en) * | 2017-09-15 | 2018-09-25 | 中国国际海运集装箱(集团)股份有限公司 | A kind of lifting hydraulic control system, control method and connecting bridge |
| CN108488112A (en) * | 2018-05-16 | 2018-09-04 | 南通润邦重机有限公司 | large-flow hydraulic system differential circuit and its control method |
| CN108488112B (en) * | 2018-05-16 | 2023-08-04 | 南通润邦重机有限公司 | Differential loop of large-flow hydraulic system and control method thereof |
| CN109322882A (en) * | 2018-12-04 | 2019-02-12 | 大连华锐重工集团股份有限公司 | A kind of hydraulic power unit and its control method of bolt-type ocean lifting platform |
| CN109973449A (en) * | 2019-03-01 | 2019-07-05 | 武汉船用机械有限责任公司 | The hydraulic control system of hoistable platform |
| CN109973449B (en) * | 2019-03-01 | 2020-07-21 | 武汉船用机械有限责任公司 | Hydraulic control system of lifting platform |
| CN110529450A (en) * | 2019-08-14 | 2019-12-03 | 杭州国辰正域科技有限公司 | Big flow low power consumption high-precision hydraulic speed regulation system based on differential principle before valve |
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| Publication number | Publication date |
|---|---|
| CN106246632B (en) | 2017-12-15 |
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