CN205876836U - Synchronous hydraulic system and hoist - Google Patents
Synchronous hydraulic system and hoist Download PDFInfo
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- CN205876836U CN205876836U CN201620760310.8U CN201620760310U CN205876836U CN 205876836 U CN205876836 U CN 205876836U CN 201620760310 U CN201620760310 U CN 201620760310U CN 205876836 U CN205876836 U CN 205876836U
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Abstract
The utility model relates to a hydraulic control technology field discloses a synchronous hydraulic system and hoist. Synchronous hydraulic system includes oil pump, controlling element, an execute component and the 2nd execute component, controlling element is including one -level controlling element who is used for the coarse adjusting flow and the second grade controlling element who is used for the accurate adjustment flow, one -level controlling element includes first switching -over valve, second switching -over valve and synchronous component, second grade controlling element includes third switching -over valve, fourth switching -over valve and proportion switching -over valve. The utility model discloses a two -stage is synchronous, adjusts the precision height, and reliable performance is good, has avoided the lectotype of big latus rectum proportion switching -over valve simultaneously, has practiced thrift the cost.
Description
Technical field
This utility model relates to technical field of hydraulic pressure, in particular it relates to a kind of synchronization hydraulic system and crane.
Background technology
Along with the Large Copacity prebaked cell technology development of aluminum industry processed, Zhi Lv enterprise in order to improve production efficiency,
Reducing production cost, it is desirable to aluminum electrolysis multifunctional overhead crane possesses more complete function, the mechanization of Multi-function equipments is with automatic
Change level improves therewith.More changing anode device is the main operating mechanisms of center blanking prebaked cell, in order to improve replacing sun
Pole efficiency, novel pot tending machine have employed double anode substitute mode.Double oil cylinder strokes due to anode change mechanism
Longer, often there is the situation that the mulch between two anodes drops in the middle synchronous error that works at the scene excessive causing, and both pollutes
Working environment adds again workshop cleaning difficulty.Therefore, it is badly in need of the synchronization hydraulic system that a kind of net synchronization capability is good.
Current synchronization hydraulic system typically realizes synchronizing with flow divider-combiner, and which belongs to open loop control mode,
Synchronization accuracy is critically depend on the precision of Hydraulic Elements own.The service load of oil cylinder, the accuracy of manufacture, cylinder seal situation and from
Body frictional resistance, all can affect the synchronization accuracy of oil cylinder through the fluid pressure line length of two oil cylinders, pipe joint quantity etc..Tradition is opened
Ring hydraulic synchronization loop cannot meet the occasion that synchronization accuracy requirement is high.
It is connected on the closed-loop fashion on two oil cylinders each working connection according to common proportional reversing valve or proportional velocity regulating valve,
Necessarily selecting big orifice model valve, cost is greatly improved, and has that overshoot when the big flow-control of proportioning valve starts is big and mistake simultaneously
The problems such as transient synchronization accuracy is low.Additionally proportional direction valve resistance tocrocking is poor, if owing to pollution or automatically controlled reason cause ratio
Proportional direction valve cisco unity malfunction, it will causing two-tank method motion the most out of control, system reliability reduces.
Utility model content
This utility model solves the technical problem that the defect being to overcome prior art, it is provided that a kind of synchronization accuracy high and
Can realize synchronization action and can realize again the synchronization hydraulic system of self contained function, this utility model purpose passes through techniques below side
Case realizes:
A kind of synchronization hydraulic system, including oil pump, controls element, the first executive component and the second executive component；Control unit
Part includes controlling element and the Two-stage control element for accurate adjustment flow for the one-level of coarse adjustment flow；Described one-level controls element
Including the first reversal valve, the second reversal valve and synchronous element；Described Two-stage control element includes the 3rd reversal valve, the 4th commutation
Valve and proportional reversing valve；Two actuator ports of described proportional reversing valve respectively with the entering of the 3rd reversal valve and the 4th reversal valve
Hydraulic fluid port is in parallel.
Described one-level controls element and is connected with oil pump；The oil-out of described oil pump by the first reversal valve selectively and with
The oil-in of step element or the oil-in connection of the 3rd reversal valve；The oil-out of described oil pump is by the second reversal valve selectively
Connect with the oil-in of synchronous element or the oil-in of the 4th reversal valve；
One actuator port of described synchronous element by the first reversal valve selectively with the oil-feed degree of lip-rounding of synchronous element
Loop or the oil return opening with the 3rd reversal valve is become to connect；The oil-out of described synchronous element by the second reversal valve selectively with
Another actuator port of synchronous element forms loop or the oil return opening with the 4th reversal valve connects；
Described 3rd reversal valve, the 4th reversal valve actuator port respectively with the first executive component, the second executive component
Oil-in connects；The outfan of described first executive component and the second executive component is respectively arranged with the displacement being connected with controller
Sensor；Described proportional reversing valve is connected with controller.
Comprehensive prior art open-circuit hydrostatic synchronizes and the pluses and minuses of closed loop hydraulic synchronization loop, and this utility model uses two
Level synchronization loop scheme, carries out first order coarse adjustment synchronization initially with synchronous element to the oil-feed on working connection, makes to respectively enter
The hydraulic fluid flow rate of the 3rd reversal valve and the 4th reversal valve is roughly equal；Then passing ratio valve carries out second time to institute's shunt volume
The i.e. accurate adjustment of regulation synchronizes.This utility model changes the mode that proportional reversing valve is connected on working connection by traditional synchronization loop,
Select as a bypass, proportional reversing valve is carried out accurate adjustment, it is to avoid use big orifice model valve so that design cost is significantly
Reduce.Additionally, it also avoid that overshoot when the big flow-control of proportioning valve starts is big and transient process synchronization accuracy is low etc. asks simultaneously
Topic.When carrying out Synchronization Control, detected the moving displacement of each executive component by the displacement transducer on executive component, pass through
The displacement of each executive component is compared by the controller being connected with displacement transducer, calculates difference and will compensate signal transmission
To proportional reversing valve, control action and the aperture of proportional reversing valve, by the 3rd reversal valve and/or the main oil of the 4th reversal valve
Road carries out hydraulic oil compensatory movement, it is achieved the synchronization of each executive component.This utility model passes through reversal valve and flow control valve pair
The reasonable ingehious design of flow so that while double oil cylinders can realize being synchronized with the movement accurately, again can be by the first commutation
The switching of valve and the second reversal valve working position realizes the independently control of two executive components.
Further, described first reversal valve and the second reversal valve are respectively provided with four hydraulic fluid ports, respectively hydraulic fluid port P, hydraulic fluid port T,
Hydraulic fluid port A and hydraulic fluid port B, and there are two operating positions；In first job position, hydraulic fluid port P connects with hydraulic fluid port A, hydraulic fluid port T and hydraulic fluid port
B connects；Second operating position, hydraulic fluid port P connects with hydraulic fluid port B, and hydraulic fluid port T connects with hydraulic fluid port A.
Further, described 3rd reversal valve, the 4th reversal valve are respectively provided with four hydraulic fluid ports, respectively hydraulic fluid port P, hydraulic fluid port T, oil
Mouth A and hydraulic fluid port B, and it is respectively provided with three operating positions；In first job position, hydraulic fluid port P ends, hydraulic fluid port T, hydraulic fluid port A, hydraulic fluid port B
It is interconnected；Second operating position, hydraulic fluid port P connects with hydraulic fluid port B, and hydraulic fluid port T connects with hydraulic fluid port A；The 3rd operating position,
Hydraulic fluid port P, hydraulic fluid port A, hydraulic fluid port B are interconnected, and hydraulic fluid port T ends.
Further, described first reversal valve, the second reversal valve are two-position four-way solenoid valve；Described 3rd reversal valve,
4th reversal valve is three position four-way electromagnetic valve.
Further, the Median Function of described three position four-way electromagnetic valve is Y type, and right position is differential connection.Described three four
Logical reversal valve controls the raising and lowering action switching of oil cylinder, and its right position is that differential connection is to realize under flow one timing improves
Reduction of speed degree.
One of preferably, the oil-in cut-off of described proportional reversing valve, oil recirculating port connecting tank.
Alternatively preferred version, the oil return opening cut-off of described proportional reversing valve, oil-in connects slippage pump.Work as ratio
Reversal valve oil recirculating port connecting tank, two_stage flow regulation carries out the compensation of synchronous error by the way of draining the oil；Work as proportional reversing valve
Oil return opening connects slippage pump, and two_stage flow regulation carries out the compensation of synchronous error by the way of repairing.
One of preferably, described synchronous element is flow divider-combiner.Make each branch through this synchronous element
Flow consistent, thus reach the purpose of the synchronization of executive component.
Alternatively preferred version, described synchronous element is syncmotor.
In order to balancing gravity loads, when preventing from declining, stall is fallen, and further, described 3rd reversal valve and first performs
Interelement connects balanced valve, and connecting between described 4th reversal valve and the second executive component has balanced valve.
Further, the oil-out of described oil pump connects overflow valve.
Another object of the present utility model is to provide a kind of crane being provided with above-mentioned hydraulic synchronous system.
Compared with prior art, this utility model has the advantages that
(1) this utility model uses two-stage to synchronize, and degree of regulation is high, and unfailing performance is good；Use coarse adjustment and the dual knot of accurate adjustment
Close, carry out closed loop control, can automatically carry out real-Time Compensation in course of action and entangle difference, not only increase the precision of regulation, and
Regulate quicker；Reduce the impact of inertia in overshoot when hydraulic system starts and worked transient, add and be
System reliability；And effectively prevent proportional reversing valve due to electric or failure cause cisco unity malfunction own, the oil caused
Cylinder action out-of-control phenomenon.
(2) second level accurate adjustment uses the mode that error is modified by proportional direction valve that increases in bypass so that ratio
The type selecting of valve is convenient, it is to avoid necessity of big orifice proportioning valve type selecting, has saved cost.
(3) accuracy synchronized can be realized, again can be by the control of reversal valve, it is achieved executive component switches to independent dynamic
Make, and switching mode is simple.
Accompanying drawing explanation
Fig. 1 is the control principle drawing of this utility model embodiment 1；
The connected mode of proportional reversing valve in Fig. 2 embodiment 2.
Detailed description of the invention
Below in conjunction with detailed description of the invention, this utility model is further described.Wherein, being merely cited for property of accompanying drawing
Illustrating, expression is only schematic diagram, rather than pictorial diagram, it is impossible to it is interpreted as the restriction to this patent；In order to this reality is better described
By novel embodiment, some parts of accompanying drawing have omission, zoom in or out, do not represent the size of actual product；To ability
For field technique personnel, in accompanying drawing, some known features and explanation thereof may be omitted and be will be understood by.
Embodiment 1
The present embodiment provides a kind of synchronization hydraulic system, including oil pump, controls element, the first executive component and the second execution
Element；Control element to include controlling element and the Two-stage control element for accurate adjustment flow for the one-level of coarse adjustment flow；Described
One-level controls element and includes the first reversal valve, the second reversal valve and flow divider-combiner；Two-stage control element includes the 3rd commutation
Valve, the 4th reversal valve and proportional reversing valve；Two actuator ports of proportional reversing valve respectively with the 3rd reversal valve, the 4th commutation
The oil-in of valve is in parallel；
One-level controls element and is connected with oil pump；The oil-out of oil pump by the first reversal valve selectively with synchronous element
The oil-in connection of oil-in or the 3rd reversal valve；The oil-out of described oil pump is selectively collected with shunting by the second reversal valve
The oil-in of stream valve or the oil-in connection of the 4th reversal valve；
One actuator port of flow divider-combiner by the first reversal valve selectively with the oil-feed degree of lip-rounding of flow divider-combiner
Loop or the oil return opening with the 3rd reversal valve is become to connect；Another actuator port of described flow divider-combiner passes through the second reversal valve
Selectively form loop with the oil-in of flow divider-combiner or the oil return opening with the 4th reversal valve connects；
3rd reversal valve, the 4th reversal valve actuator port respectively with the first executive component, the oil-feed of the second executive component
Mouth connection；The outfan of described first executive component and the second executive component is respectively arranged with the displacement sensing being connected with controller
Device；Proportional reversing valve is connected with controller.
First reversal valve and the second reversal valve are respectively provided with four hydraulic fluid ports, for hydraulic fluid port P, hydraulic fluid port T, hydraulic fluid port A and hydraulic fluid port B, and have
There are two operating positions；In first job position, hydraulic fluid port P connects with hydraulic fluid port A, and hydraulic fluid port T connects with hydraulic fluid port B；Second work
Making position, hydraulic fluid port P connects with hydraulic fluid port B, and hydraulic fluid port T connects with hydraulic fluid port A.
3rd reversal valve, the 4th reversal valve are respectively provided with four hydraulic fluid ports, respectively hydraulic fluid port P, hydraulic fluid port T, hydraulic fluid port A and hydraulic fluid port B, and
It is respectively provided with three operating positions；In first job position, hydraulic fluid port P ends, and hydraulic fluid port T, hydraulic fluid port A, hydraulic fluid port B are interconnected；?
Two operating positions, hydraulic fluid port P connects with hydraulic fluid port B, and hydraulic fluid port T connects with hydraulic fluid port A；The 3rd operating position, hydraulic fluid port P, hydraulic fluid port A,
Hydraulic fluid port B is interconnected, and hydraulic fluid port T ends.
In the present embodiment, the first reversal valve, the second reversal valve are two-position four-way solenoid valve；Described 3rd reversal valve,
Four reversal valves are three position four-way electromagnetic valve；The Median Function of three position four-way electromagnetic valve is Y type, and right working position is differential connection.
First executive component is the first oil cylinder, and the second executive component is the second oil cylinder.
Obtained by the electromagnetism of the first reversal valve and the second reversal valve and whether electric realize the independent of the first oil cylinder and the second oil cylinder
Switch with teamwork.
It is below two oil cylinder independence and Principles of Synchronic Control.
1, the realization that two oil cylinders individually control
Carrying out when individually controlling of two oil cylinders, flow divider-combiner 1 is not involved in controlling, and two two-position four way change valves 2 are the most not
Obtaining electric, operating position is middle position: hydraulic oil flows through two-position four way change valve 2, without flow divider-combiner 1 from oil delivery side of pump
Flow directly into two three position four-way directional control valves 3 controlling two oil cylinders 5 respectively.
The single movement of two oil cylinders is realized by controlling the operating position of two three position four-way directional control valves 3 respectively.Such as,
When the electric magnet of the left working position controlling the 3rd reversal valve obtains electric, and hydraulic oil flows out from the 3rd reverse valve oil head B, passes through balanced valve
In check valve enter into the rod chamber of oil cylinder；So realize the vertical motion of an oil cylinder.When the right side controlling the 3rd reversal valve
The electric magnet of working position obtains electric, and system starts to build pressure, and pressure reaches balanced valve 4 and opens pressure, and this valve is opened, and hydraulic oil is from the 3rd
Reverse valve oil head A exits into the rodless cavity of oil cylinder, so realizes the down maneuver of oil cylinder.In like manner, by controlling the 4th commutation
The switching of the operating position of valve, it is possible to achieve the raising and lowering action of another oil cylinder.
2, the realization of two oil cylinder synchronizing functions
When carrying out the Synchronization Control of two oil cylinders, the hydraulic oil entering oil cylinder controls element and Two-stage control by one-level respectively
Element carries out Flow-rate adjustment.
Controlling two two-position four way change valves 2 and all obtain electric, now hydraulic oil is divided into two-way respectively from the first reversal valve and
The hydraulic fluid port P of two reversal valves enters, and flows out from respective hydraulic fluid port B, further plays the oil-in of entrance flow divider-combiner 1 and by this valve
After, out it is divided into two-way from flow divider-combiner oil-out and flows to the first reversal valve and the second reversal valve respectively, more respectively from first
The hydraulic fluid port A of reversal valve and the second reversal valve flows out, and so realizes the one-level coarse adjustment of flow.After hydraulic oil passes through flow divider-combiner,
The hydraulic oil that two-way flows to oil cylinder is roughly the same.
Obtain electric by controlling the electric magnet of the 3rd reversal valve and the 4th same working position of reversal valve simultaneously, be switched to two oil cylinders
Combined synchronization action, it is achieved two oil cylinders rise or fall action simultaneously.As it is shown in figure 1, control the 3rd reversal valve and the 4th simultaneously
The electric magnet of the right working position of reversal valve obtains electric, and system starts to build pressure, and pressure reaches balanced valve 4 and opens this valve of pressure and open, hydraulic pressure
Oil hydraulic fluid port A from the 3rd reversal valve and the 4th reversal valve respectively exits into the rodless cavity of corresponding oil cylinder, it is achieved two oil cylinders
Down maneuver.
Two displacement transducers 6 laying respectively at two oil cylinder 5 outfans detect the displacement of two oil cylinders 5 the most in real time.If
During decline, the decrease speed of the first oil cylinder causes the synchronous error of the first oil cylinder and the second oil cylinder to exceed setting of controller soon
During definite value, controller carries out computing to feedback signal and processes, and controls the left position of proportional reversing valve 7 and opens, makes proportional reversing valve 7
Hydraulic fluid port A leads to the hydraulic fluid port T-phase of proportional reversing valve 7, and hydraulic oil is flowed into fuel tank from the hydraulic fluid port T of proportional reversing valve 7, reduces the 3rd and changes
To the oil inlet quantity of valve, it is achieved the first oil cylinder that speed is the fastest is bled off a part of oil-feed, thus reduces under the first oil cylinder
The purpose of reduction of speed degree.Proportional reversing valve 7, according to the feedback signal of displacement transducer 6, controls the valve port of proportional reversing valve 7 continuously
Aperture, makes the first oil cylinder displacement reach unanimity with the second oil cylinder displacement；Treat that displacement transducer 6 detects that two oil cylinder synchronization accuracies arrive
After in range of error, controller controls proportional reversing valve 7 and is switched to middle position, quits work.So realize the closed loop of synchronization loop
Control, reach the purpose of two grades of accurate adjustments.Treat that error goes beyond the scope again and enter subsequent work circulation.
More than simply two oil cylinders decline, the description of the situation that the first oil cylinder speed is the fastest, principle class when other operating mode occurs
Seemingly, simply control direction reversal valve obtains electric difference, no longer applies and states.
The present embodiment provides a kind of crane being provided with above-mentioned synchronization hydraulic system simultaneously.
Embodiment 2
Embodiment 2 is with the difference of embodiment 1, the connected mode of two proportional reversing valves 7 and synchronous element
Difference.As in figure 2 it is shown, the actuator port of proportional reversing valve 7 respectively with the oil-in of the 3rd reversal valve, the entering of the 4th reversal valve
Hydraulic fluid port connects, and hydraulic fluid port T ends, and hydraulic fluid port P connects slippage pump；In the present embodiment, synchronous element is syncmotor (being not drawn in figure).
When carrying out the Synchronization Control of oil cylinder, the present embodiment difference from Example 1 is the accurate adjustment side of two_stage flow
Formula, synchronous error is compensated by the way of repairing by the present embodiment.
When declining with two oil cylinders below, as a example by the situation that the first oil cylinder speed is the fastest, illustrate repairing control principle.If
During decline, the decrease speed of the first oil cylinder causes the synchronous error of the first oil cylinder and the second oil cylinder to exceed setting of controller soon
During definite value, controller carries out computing to feedback signal and processes, and controls the left position of proportional reversing valve 7 and opens, makes proportional reversing valve 7
Hydraulic fluid port B communicates with the hydraulic fluid port P of proportional reversing valve 7, and slippage pump, is increased the 4th reversal valve replenisher force feed by hydraulic fluid port P, hydraulic fluid port B
Add the oil inlet quantity of the 4th reversal valve, it is achieved the second oil cylinder that speed is the slowest is supplemented a part of oil-feed, thus reaches to improve
The purpose of the decrease speed of two oil cylinders.
Proportional reversing valve 7, according to the feedback signal of displacement transducer 6, controls the valve port opening of proportional reversing valve 7 continuously,
The second oil cylinder displacement is made to reach unanimity with the first oil cylinder displacement；Treat that displacement transducer 6 detects that two oil cylinder synchronization accuracies are to error
After in the range of, controller controls proportional reversing valve 7 and is switched to middle position, quits work.So realize the closed loop control of synchronization loop,
Reach the purpose of two grades of accurate adjustments.Treat that error goes beyond the scope again and enter subsequent work circulation.
Obviously, above-described embodiment is only for clearly demonstrating the technical solution of the utility model example, and also
Non-is the restriction to embodiment of the present utility model.For those of ordinary skill in the field, in described above
On the basis of can also make other changes in different forms.Here without also all of embodiment being given thoroughly
Lift.All any amendment, equivalent and improvement etc. made within spirit of the present utility model and principle, should be included in this
Within the protection domain that utility model right requires.
Claims (10)
1. a synchronization hydraulic system, including oil pump, controls element, the first executive component and the second executive component；Its feature exists
In, control element and include controlling element and the Two-stage control element for accurate adjustment flow for the one-level of coarse adjustment flow；Described one
Level controls element and includes the first reversal valve, the second reversal valve and synchronous element；Described Two-stage control element includes the 3rd commutation
Valve, the 4th reversal valve and proportional reversing valve；Two actuator ports of described proportional reversing valve respectively with the 3rd reversal valve, the 4th
The oil-in of reversal valve is in parallel；
Described one-level controls element and is connected with oil pump；The oil-out of described oil pump is selectively first with synchronization by the first reversal valve
The oil-in of part or the oil-in connection of the 3rd reversal valve；The oil-out of described oil pump passes through the second reversal valve selectively with same
The oil-in of step element or the oil-in connection of the 4th reversal valve；
One actuator port of described synchronous element passes through first reversal valve oil-in selectively with synchronous element and is formed back
Road or the oil return opening with the 3rd reversal valve connect；Another actuator port of described synchronous element be may select by the second reversal valve
Ground forms loop with the oil-in of synchronous element or the oil return opening with the 4th reversal valve connects；
Described 3rd reversal valve, the 4th reversal valve actuator port respectively with the first executive component, the oil-feed of the second executive component
Mouth connection；The outfan of described first executive component and the second executive component is respectively arranged with the displacement sensing being connected with controller
Device；Described proportional reversing valve is connected with controller.
Synchronization hydraulic system the most according to claim 1, it is characterised in that described first reversal valve and the second reversal valve all have
There are four hydraulic fluid ports, respectively hydraulic fluid port P, hydraulic fluid port T, hydraulic fluid port A and hydraulic fluid port B, and there are two operating positions；In first job position
Putting, hydraulic fluid port P connects with hydraulic fluid port A, and hydraulic fluid port T connects with hydraulic fluid port B；Second operating position, hydraulic fluid port P connects with hydraulic fluid port B, hydraulic fluid port T
Connect with hydraulic fluid port A.
Synchronization hydraulic system the most according to claim 1, it is characterised in that described 3rd reversal valve, the 4th reversal valve all have
There are four hydraulic fluid ports, respectively hydraulic fluid port P, hydraulic fluid port T, hydraulic fluid port A and hydraulic fluid port B, and are respectively provided with three operating positions；In first job position
Putting, hydraulic fluid port P ends, and hydraulic fluid port T, hydraulic fluid port A, hydraulic fluid port B are interconnected；Second operating position, hydraulic fluid port P connects with hydraulic fluid port B, hydraulic fluid port
T connects with hydraulic fluid port A；The 3rd operating position, hydraulic fluid port P, hydraulic fluid port A, hydraulic fluid port B are interconnected, and hydraulic fluid port T ends.
Synchronization hydraulic system the most according to claim 1, it is characterised in that described first reversal valve, the second reversal valve are
Two-position four-way solenoid valve；Described 3rd reversal valve, the 4th reversal valve are three position four-way electromagnetic valve；Preferably, described three four
The Median Function of three-way electromagnetic valve is Y type, and right position is differential connection.
The most according to claim 1, synchronization hydraulic system, it is characterised in that the oil-in cut-off of described proportional reversing valve, return
Hydraulic fluid port connected tank.
The most according to claim 1, synchronization hydraulic system, it is characterised in that the oil return opening cut-off of described proportional reversing valve, enter
Hydraulic fluid port connects slippage pump.
Synchronization hydraulic system the most according to claim 1, it is characterised in that described synchronous element is flow divider-combiner.
Synchronization hydraulic system the most according to claim 1, it is characterised in that described synchronous element is syncmotor.
Synchronization hydraulic system the most according to claim 1, it is characterised in that between described 3rd reversal valve and the first executive component
Connecting and have balanced valve, connecting between described 4th reversal valve and the second executive component has balanced valve.
10. one kind is provided with the crane of synchronization hydraulic system described in claim 1 to 9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620760310.8U CN205876836U (en) | 2016-07-20 | 2016-07-20 | Synchronous hydraulic system and hoist |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620760310.8U CN205876836U (en) | 2016-07-20 | 2016-07-20 | Synchronous hydraulic system and hoist |
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| CN205876836U true CN205876836U (en) | 2017-01-11 |
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| CN201620760310.8U Active CN205876836U (en) | 2016-07-20 | 2016-07-20 | Synchronous hydraulic system and hoist |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015138A (en) * | 2016-07-20 | 2016-10-12 | 株洲天桥起重机股份有限公司 | Synchronous hydraulic system and crane |
| CN106957027A (en) * | 2017-04-26 | 2017-07-18 | 中意泰达(营口)汽车保修设备有限公司 | The full-automatic leveling system of lifting machine |
| 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 |
-
2016
- 2016-07-20 CN CN201620760310.8U patent/CN205876836U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015138A (en) * | 2016-07-20 | 2016-10-12 | 株洲天桥起重机股份有限公司 | Synchronous hydraulic system and crane |
| CN106015138B (en) * | 2016-07-20 | 2018-04-17 | 株洲天桥起重机股份有限公司 | A kind of synchronization hydraulic system and crane |
| CN106957027A (en) * | 2017-04-26 | 2017-07-18 | 中意泰达(营口)汽车保修设备有限公司 | The full-automatic leveling system of lifting machine |
| 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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