CN104100590B - Jacking hydraulic system and jacking method thereof and the method that returns back to top - Google Patents
Jacking hydraulic system and jacking method thereof and the method that returns back to top Download PDFInfo
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- CN104100590B CN104100590B CN201410350140.1A CN201410350140A CN104100590B CN 104100590 B CN104100590 B CN 104100590B CN 201410350140 A CN201410350140 A CN 201410350140A CN 104100590 B CN104100590 B CN 104100590B
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000006073 displacement reaction Methods 0.000 claims description 92
- 230000010363 phase shift Effects 0.000 claims description 29
- 239000002828 fuel tank Substances 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 14
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a kind of jacking hydraulic system and jacking method thereof and the method that returns back to top, belong to hydraulic lifting technical field, solve the limited amount at the control point of existing semi-automatic hydraulic jack-up system, and the precision of each control point synchronization of jacking up is poor, be difficult to the problem of the demand meeting current building.This jacking hydraulic system, comprise a main website and at least one slave station, by main website for the jack in each slave station provides oil pressure, the first ball valve in each slave station and the second ball valve can also improve the control accuracy of piston and piston rod further.
Description
Technical field
The present invention relates to hydraulic lifting technical field, specifically, relate to a kind of jacking hydraulic system and jacking method thereof and the method that returns back to top.
Background technique
Along with the building of various places gets more and more, synchronous jacking system is also more and more applied in the jacking process of building.
At present, in the jacking process of building, common employing semi-automatic hydraulic jack-up system, these semi-automatic hydraulic jack-up systems can solve the jacking problem of heavy duty preferably.But for the large weight of complex structure, load diatibution inequality, the situation of large volume, need the control point increasing jacking, and the limited amount at the control point of existing semi-automatic hydraulic jack-up system, and the precision of each control point synchronization of jacking up is poor, be difficult to the demand meeting current building.
Summary of the invention
The object of the present invention is to provide a kind of jacking hydraulic system and jacking method thereof and the method that returns back to top, with the technical problem that the precision solving multiple control points synchronization of jacking up in prior art is poor.
The invention provides a kind of jacking hydraulic system, comprise a main website and at least one slave station;
Described main website comprises fuel tank, the first selector valve, Pilot operated check valve, digital phase-shift technology, pressure transducer and controller;
Described fuel tank is communicated with described first selector valve by the oil pump with variable-frequency motor, described pressure transducer is arranged between described oil pump and described first selector valve, described first selector valve is communicated with first interface and the second interface, described Pilot operated check valve is connected between described first selector valve and described first interface, and described digital phase-shift technology is arranged between described Pilot operated check valve and described first interface;
Each described slave station comprises jack, and the oil cylinder in described jack is divided into the first cavity and the second cavity by the piston in described jack, and described piston is connected with piston rod, and described jack is provided with the sensor measuring jacking displacement;
Described first cavity is communicated with described first interface respectively by in-line with oil circuit, is connected with the first ball valve in described in-line, is connected with the second ball valve in described oil circuit, and described second cavity is communicated with described second interface;
Described first selector valve, described digital phase-shift technology, described pressure transducer, and displacement transducer, the first ball valve and the second ball valve in each described slave station, be all connected with described controller.
Further, described main website also comprises the second selector valve, and described second selector valve is connected between the control end of described oil pump and described Pilot operated check valve.
Preferably, described first selector valve and described second selector valve are three position four-way directional control valve.
Preferably, described controller comprises PLC.
The present invention also provides a kind of jacking method of above-mentioned jacking hydraulic system, comprising:
Step 1, is regulated the pressure of digital phase-shift technology, and opens the first ball valve of each slave station, by the first cavity oil-feed of main website to jack in each slave station by controller;
Step 2, is controlled the first ball valve of each slave station by controller, make each jack carry out jacking;
Step 3, carry out in jacking process at each jack, read the displacement of every Jacking point place displacement transducer of each slave station, calculate the displacement difference at each Jacking point place, and the first ball valve of each slave station is controlled by controller, the displacement difference at each Jacking point place is kept to be within control accuracy scope, until the jacking displacement at each Jacking point place all arrives target location.
Further, in described step 3, comprising:
Step 31, reads the displacement at every Jacking point place of each slave station, calculates the displacement difference at each Jacking point place;
Step 32, judges whether the difference of maximum displacement in each Jacking point place and least displacement is greater than control accuracy, if it is carry out step 33, otherwise carry out step 34;
Step 33, regulates variable-frequency motor, reduces oil pump flow, and returns step 31;
Step 34, judge whether the difference of maximum displacement in each Jacking point place and least displacement is greater than 0.6 times of control accuracy, if it is close the maximum Jacking point place of displacement slave station in the first ball valve, and carry out step 35, otherwise open the first ball valve of each slave station, and carry out step 35;
Step 35, judges whether the jacking displacement at each Jacking point place all arrives target location, if it is terminates jacking, otherwise returns step 31.
Preferably, described control accuracy is ± 0.5mm.
The present invention also provides a kind of method that returns back to top of above-mentioned jacking hydraulic system, comprising:
Step 1, is regulated the pressure of digital phase-shift technology, and opens the second ball valve of each slave station, make the fluid in the first cavity of jack in each slave station flow back to fuel tank by described digital phase-shift technology by controller;
Step 2, is controlled the second ball valve of each slave station by controller, each piston rod is returned back to top;
Step 3, carry out returning back to top in process at each jack, read the displacement of every Jacking point place displacement transducer of each slave station, calculate the displacement difference at each Jacking point place, and the second ball valve of each slave station is controlled by controller, the displacement difference at each Jacking point place is kept to be within control accuracy scope, until the jacking displacement at each Jacking point place all arrives target location.
Further, in described step 3, comprising:
Step 31, reads the displacement at every Jacking point place of each slave station, calculates the displacement difference at each Jacking point place;
Step 32, judges whether the difference of maximum displacement in each Jacking point place and least displacement is greater than control accuracy, if it is carry out step 33, otherwise carry out step 34;
Step 33, regulates variable-frequency motor, reduces oil pump flow, and returns step 31;
Step 34, judge whether the difference of maximum displacement in each Jacking point place and least displacement is greater than 0.6 times of control accuracy, if it is close the maximum Jacking point place of displacement slave station in the second ball valve, and carry out step 35, otherwise open the second ball valve of each slave station, and carry out step 35;
Step 35, judges whether the jacking displacement at each Jacking point place all arrives target location, if it is terminates to return back to top, otherwise returns step 31.
Preferably, described control accuracy is ± 0.5mm.
Present invention offers following beneficial effect: jacking hydraulic system provided by the invention is made up of a main website and multiple slave station, the quantity of slave station can be set according to actual needs, to realize Multi-point synchronization jacking.Further, by main website for the jack in each slave station provides oil pressure, the first ball valve in each slave station and the second ball valve can also improve the control accuracy of piston and piston rod further.Therefore, jacking hydraulic system provided by the invention and jacking method thereof and the method that returns back to top, can realize the synchronization of jacking up at high-precision multiple control point and synchronously return back to top.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from specification, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in specification, claims and accompanying drawing and obtain.
Accompanying drawing explanation
In order to be illustrated more clearly in the technological scheme in the embodiment of the present invention, accompanying drawing required in describing is done simple introduction below to embodiment:
Fig. 1 is the schematic diagram of the main website of the jacking hydraulic system that the embodiment of the present invention provides;
Fig. 2 is the schematic diagram of the slave station of the jacking hydraulic system that the embodiment of the present invention provides;
Fig. 3 is the flow chart of the jacking method of the jacking hydraulic system that the embodiment of the present invention provides;
Fig. 4 is the flow chart of the method that returns back to top of the jacking hydraulic system that the embodiment of the present invention provides.
Embodiment
Describe embodiments of the present invention in detail below with reference to drawings and Examples, to the present invention, how application technology means solve technical problem whereby, and the implementation procedure reaching technique effect can fully understand and implement according to this.It should be noted that, only otherwise form conflict, each embodiment in the present invention and each feature in each embodiment can be combined with each other, and the technological scheme formed is all within protection scope of the present invention.
As depicted in figs. 1 and 2, the embodiment of the present invention provides a kind of jacking hydraulic system, comprises a main website 100 and at least one slave station 200.
Main website 100 comprises fuel tank 1, first selector valve 21, Pilot operated check valve 3, digital phase-shift technology 4, pressure transducer 5 and controller (not shown).
Fuel tank 1 is communicated with the first selector valve 21 by the oil pump 12 with variable-frequency motor 11, and pressure transducer 5 is arranged between oil pump 12 and the first selector valve 21.In addition, the pressure gauge 50 be connected with pressure transducer 5 can also be set, so that the reading of real-time monitored pressure transducer 5.
First selector valve 21 is communicated with first interface 61 and the second interface 62, and Pilot operated check valve 3 is connected between the first selector valve 21 and first interface 61, and digital phase-shift technology 4 is arranged between Pilot operated check valve 3 and first interface 61.
Each slave station 200 comprises jack 7, and the oil cylinder in jack 7 is divided into the first cavity 71 and the second cavity 72 by the piston 70 in jack 7, and piston 70 is connected with piston rod 73, and piston rod 73 is connected with displacement transducer (not shown).Wherein, displacement transducer is used for the relative displacement that sensing piston 70 and piston rod 73 in real time stretch out.
First cavity 71 is communicated with first interface 61 respectively by in-line with oil circuit, is connected with the first ball valve 81 in in-line, is connected with the second ball valve 82, second cavity 72 and is communicated with the second interface 62 in oil circuit.In addition, in-line also can be provided with pressure transducer 5.
First selector valve 21, digital phase-shift technology 4, pressure transducer 5, and displacement transducer, the first ball valve 81 and the second ball valve 82 in each slave station, be all connected with controller.Wherein, programmable logic controller (PLC) (ProgrammableLogicController is called for short PLC) can be comprised in controller.
In the present embodiment, also comprise the second selector valve 22, second selector valve 22 in main website 100 further and be connected between the control end of oil pump 12 and Pilot operated check valve 3.First selector valve 21 and the second selector valve 22 are all preferably three position four-way directional control valve.
The working principle of this jacking hydraulic system is as follows:
In main website 100, variable-frequency motor 11 drives oil pump 12 to start, and the first selector valve 21 and the second selector valve 22 all mediate at the beginning.Now system is in unloading condition, and the fluid that the oil outlet of oil pump 12 exports flows back to fuel tank 1 through the second selector valve 22.
When the second selector valve 22 switch to right position, the first selector valve 21 switch to left position time, the fluid that the oil outlet of oil pump 12 exports enters each slave station 200 through the first selector valve 21, Pilot operated check valve 3 and first interface 61 successively.Open the first ball valve 81 in each slave station 200, fluid can enter the first cavity 71 of the jack 7 in each slave station 200.
In the present embodiment, digital phase-shift technology 4 is inner for stepper motor is by gear transmission, screw thread guiding promotion push rod Compress Spring, spring top pressure cone valve, control step motor position adjustable springs decrement, thus controlling water kick pressure.Therefore, the pressure in jacking hydraulic system is determined by the pressure of digital phase-shift technology 4 medi-spring, and the spring now in digital phase-shift technology 4 is in pressure-less state, so there is no pressure in system, and the piston 70 in jack 7 and piston rod 73 transfixion.Then, slowly regulate digital phase-shift technology 4 by controller, piston 70 moves under the effect of fluid, and when reaching required pressure, digital phase-shift technology 4 stops continuing supercharging to ensure security of system.If just in case there is the situation of system overcharge, pressure exceedes the predetermined pressure of safety valve 41, safety valve 41 can be opened to ensure security of system instantaneously.
When jack 7 needs pressurize, by controller, the second selector valve 22 is switched to neutral position, the fluid that the oil outlet of oil pump 12 exports flows back to fuel tank 1 through the second selector valve 22, and the fluid in jack 7 is closed by the first ball valve 81 and the second ball valve 82 and realized pressurize.When oil liquid leakage build-up of pressure declines, only need switch the second selector valve 22 just can realize ftercompction.
During fluid backhaul in the first cavity 71 of jack 7, first by controller the pressure of digital phase-shift technology 4 turned down to former working pressure less than 95%, open the second ball valve 82 of each slave station, fluid flows back to fuel tank 1 through digital phase-shift technology 4 under load gravity pressure.Now by the pressure of adjustment digital phase-shift technology 4, band can be realized and carries the function declined.
When load external force is eliminated, if piston 70 and piston rod 73 also do not get back to position completely, by controller, the first selector valve 21 can be switched to right position, the second selector valve 22 is switched to left position.The fluid of the oil outlet output of oil pump 12 flows into the control end of Pilot operated check valve 3 through the second selector valve 22, Pilot operated check valve 3 can reversely be circulated.When the pressure of the control end of Pilot operated check valve 3 exceedes the predetermined pressure of safety valve 42, safety valve 42 can be opened to ensure security of system.
The fluid of the oil outlet output of oil pump 12 flows into the second cavity 72 of each jack 7 through the first selector valve 21, promotion piston 70 and piston rod 73 are return.In the process, if there is overload, safety valve 43 can be opened to ensure security of system in time.Meanwhile, the fluid in the first cavity 71 of jack 7 flows back to fuel tank 1 through Pilot operated check valve 3 and the first selector valve 21.
The embodiment of the present invention also provides a kind of jacking method of this jacking hydraulic system, can realize the synchronization of jacking up at high-precision multiple control point.As shown in Figure 3, this jacking method comprises:
S1: initialization is carried out to system.
First set the parameters such as the target location of synchronization of jacking up, then regulated the pressure of digital phase-shift technology by controller, and open the first ball valve of each slave station, by the first cavity oil-feed of main website to jack in each slave station.
S2: by pressure transducer reading system pressure, and judge current system pressure whether higher than 2 to the 3Mpa of pressure of weighing by controller.
If it is controlled the first ball valve of each slave station by controller, make each piston rod carry out jacking.If not, then return step S1, continue pressurization.
S3: carry out in jacking process at each jack, read the displacement of every Jacking point place displacement transducer of each slave station, calculate the displacement difference at each Jacking point place, and the first ball valve of each slave station is controlled by controller, the displacement difference at each Jacking point place is kept to be within control accuracy scope, until the jacking displacement at each Jacking point place all arrives target location.
Specifically comprise:
S31: the displacement of reading every Jacking point place of each slave station, calculates the displacement difference at each Jacking point place.
S32: judge whether the difference of maximum displacement in each Jacking point place and least displacement is greater than control accuracy, if it is carries out step S33, otherwise carries out step S34.
As a preferred version, this control accuracy is ± 0.5mm.
S33: regulate variable-frequency motor, reduces oil pump flow, and returns step S31.
S34: judge whether the difference of maximum displacement in each Jacking point place and least displacement is greater than 0.6 times of control accuracy.
If this difference is not more than 0.6 times of control accuracy, then (continuation) open the first ball valve of each slave station, carry out synchronization of jacking up.If this difference is greater than 0.6 times of control accuracy, then can also judge whether the difference of each Jacking point place displacement and least displacement is greater than 0.8 times of control accuracy further.
If this difference is not more than 0.8 times of control accuracy, then (continuation) open the first ball valve of each slave station, carry out synchronization of jacking up.If this difference is greater than 0.8 times of control accuracy, then close the maximum Jacking point place of displacement slave station in the first ball valve.
Then, step S35 is carried out.
S35: judge whether the jacking displacement at each Jacking point place all arrives target location, if it is terminates jacking, otherwise returns step S31.
The embodiment of the present invention also provides a kind of method that returns back to top of this jacking hydraulic system, can realize synchronously returning back to top of high-precision multiple control point.As shown in Figure 4, this jacking method comprises:
S1: initialization is carried out to system.
First read the parameters such as the initial position returned back to top, then regulated the pressure of digital phase-shift technology by controller, and open the second ball valve of each slave station, make the fluid in the first cavity of jack in each slave station flow back to fuel tank by digital phase-shift technology.
S2: by pressure transducer reading system pressure, and judge current system pressure whether lower than 3 to the 5Mpa of pressure of weighing by controller.
If it is controlled the second ball valve of each slave station by controller, each piston rod is returned back to top.If not then returning step S1, continue step-down.
S3: carry out returning back to top in process at each jack, read the displacement of every Jacking point place displacement transducer of each slave station, calculate the displacement difference at each Jacking point place, and the second ball valve of each slave station is controlled by controller, the displacement difference at each Jacking point place is kept to be within control accuracy scope, until the jacking displacement at each Jacking point place all arrives target location.
Specifically comprise:
S31: the displacement of reading the Jacking point place of each slave station, calculates the displacement difference at each Jacking point place.
S32: judge whether the difference of maximum displacement in each Jacking point place and least displacement is greater than control accuracy, if it is carries out step S33, otherwise carries out step S34.
As a preferred version, this control accuracy is ± 0.5mm.
S33: regulate variable-frequency motor, reduces oil pump flow, and returns step S31;
S34: judge whether the difference of maximum displacement in each Jacking point place and least displacement is greater than 0.6 times of control accuracy.
If this difference is not more than 0.6 times of control accuracy, then (continuation) open the second ball valve of each slave station, synchronously return back to top.If this difference is greater than 0.6 times of control accuracy, then can also judge whether the difference of each Jacking point place displacement and least displacement is greater than 0.8 times of control accuracy further.
If this difference is not more than 0.8 times of control accuracy, then (continuation) open the second ball valve of each slave station, synchronously return back to top.If this difference is greater than 0.8 times of control accuracy, then close the maximum Jacking point place of displacement slave station in the second ball valve.
Then, step S35 is carried out.
S35: judge whether the jacking displacement at each Jacking point place all arrives target location, if it is terminates to return back to top, otherwise returns step S31.
Jacking hydraulic system provided by the invention is made up of a main website and multiple slave station, can arrange the quantity of slave station according to actual needs, to realize Multi-point synchronization jacking.Further, by main website for the jack in each slave station provides oil pressure, the first ball valve in each slave station and the second ball valve can also improve the control accuracy of piston and piston rod further.Therefore, jacking hydraulic system provided by the invention and jacking method thereof and the method that returns back to top, can realize the synchronization of jacking up at high-precision multiple control point and synchronously return back to top, synchronization accuracy can reach ± 0.5mm.
Although mode of execution disclosed in this invention is as above, the mode of execution that described content just adopts for the ease of understanding the present invention, and be not used to limit the present invention.Technician in any the technical field of the invention; under the prerequisite not departing from spirit and scope disclosed in this invention; any amendment and change can be done what implement in form and in details; but scope of patent protection of the present invention, the scope that still must define with appending claims is as the criterion.
Claims (6)
1. a jacking method for jacking hydraulic system, this jacking hydraulic system comprises a main website and at least one slave station;
Described main website comprises fuel tank, the first selector valve, Pilot operated check valve, digital phase-shift technology, pressure transducer and controller;
Described fuel tank is communicated with described first selector valve by the oil pump with variable-frequency motor, described pressure transducer is arranged between described oil pump and described first selector valve, described first selector valve is communicated with first interface and the second interface, described Pilot operated check valve is connected between described first selector valve and described first interface, and described digital phase-shift technology is arranged between described Pilot operated check valve and described first interface;
Each described slave station comprises jack, and the oil cylinder in described jack is divided into the first cavity and the second cavity by the piston in described jack, and described piston is connected with piston rod, and described jack is provided with the sensor measuring jacking displacement;
Described first cavity is communicated with described first interface respectively by in-line with oil circuit, is connected with the first ball valve in described in-line, is connected with the second ball valve in described oil circuit, and described second cavity is communicated with described second interface;
Described first selector valve, described digital phase-shift technology, described pressure transducer, and displacement transducer, the first ball valve and the second ball valve in each described slave station, be all connected with described controller; It is characterized in that,
The method comprises:
Step 1, is regulated the pressure of digital phase-shift technology, and opens the first ball valve of each slave station, by the first cavity oil-feed of main website to jack in each slave station by controller;
Step 2, is controlled the first ball valve of each slave station by controller, make each jack carry out jacking;
Step 3, carry out in jacking process at each jack, read the displacement of every Jacking point place displacement transducer of each slave station, calculate the displacement difference at each Jacking point place, and the first ball valve of each slave station is controlled by controller, the displacement difference at each Jacking point place is kept to be within control accuracy scope, until the jacking displacement at each Jacking point place all arrives target location.
2. the method for claim 1, is characterized in that, in described step 3, comprising:
Step 31, reads the displacement at every Jacking point place of each slave station, calculates the displacement difference at each Jacking point place;
Step 32, judges whether the difference of maximum displacement in each Jacking point place and least displacement is greater than control accuracy, if it is carry out step 33, otherwise carry out step 34;
Step 33, regulates variable-frequency motor, reduces oil pump flow, and returns step 31;
Step 34, judge whether the difference of maximum displacement in each Jacking point place and least displacement is greater than 0.6 times of control accuracy, if it is close the maximum Jacking point place of displacement slave station in the first ball valve, and carry out step 35, otherwise open the first ball valve of each slave station, and carry out step 35;
Step 35, judges whether the jacking displacement at each Jacking point place all arrives target location, if it is terminates jacking, otherwise returns step 31.
3. method as claimed in claim 2, it is characterized in that, described control accuracy is ± 0.5mm.
4. the method that returns back to top of jacking hydraulic system, this jacking hydraulic system comprises a main website and at least one slave station;
Described main website comprises fuel tank, the first selector valve, Pilot operated check valve, digital phase-shift technology, pressure transducer and controller;
Described fuel tank is communicated with described first selector valve by the oil pump with variable-frequency motor, described pressure transducer is arranged between described oil pump and described first selector valve, described first selector valve is communicated with first interface and the second interface, described Pilot operated check valve is connected between described first selector valve and described first interface, and described digital phase-shift technology is arranged between described Pilot operated check valve and described first interface;
Each described slave station comprises jack, and the oil cylinder in described jack is divided into the first cavity and the second cavity by the piston in described jack, and described piston is connected with piston rod, and described jack is provided with the sensor measuring jacking displacement;
Described first cavity is communicated with described first interface respectively by in-line with oil circuit, is connected with the first ball valve in described in-line, is connected with the second ball valve in described oil circuit, and described second cavity is communicated with described second interface;
Described first selector valve, described digital phase-shift technology, described pressure transducer, and displacement transducer, the first ball valve and the second ball valve in each described slave station, be all connected with described controller; It is characterized in that,
The method comprises:
Step 1, is regulated the pressure of digital phase-shift technology, and opens the second ball valve of each slave station, make the fluid in the first cavity of jack in each slave station flow back to fuel tank by described digital phase-shift technology by controller;
Step 2, is controlled the second ball valve of each slave station by controller, each jack is returned back to top;
Step 3, carry out returning back to top in process at each jack, read the displacement of every Jacking point place displacement transducer of each slave station, calculate the displacement difference at each Jacking point place, and the second ball valve of each slave station is controlled by controller, the displacement difference at each Jacking point place is kept to be within control accuracy scope, until the jacking displacement at each Jacking point place all arrives target location.
5. method as claimed in claim 4, is characterized in that, in described step 3, comprising:
Step 31, reads the displacement at every Jacking point place of each slave station, calculates the displacement difference at each Jacking point place;
Step 32, judges whether the difference of maximum displacement in each Jacking point place and least displacement is greater than control accuracy, if it is carry out step 33, otherwise carry out step 34;
Step 33, regulates variable-frequency motor, reduces oil pump flow, and returns step 31;
Step 34, judge whether the difference of maximum displacement in each Jacking point place and least displacement is greater than 0.6 times of control accuracy, if it is close the maximum Jacking point place of displacement slave station in the second ball valve, and carry out step 35, otherwise open the second ball valve of each slave station, and carry out step 35;
Step 35, judges whether the jacking displacement at each Jacking point place all arrives target location, if it is terminates to return back to top, otherwise returns step 31.
6. method as claimed in claim 5, it is characterized in that, described control accuracy is ± 0.5mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410350140.1A CN104100590B (en) | 2014-07-22 | 2014-07-22 | Jacking hydraulic system and jacking method thereof and the method that returns back to top |
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| CN201410350140.1A CN104100590B (en) | 2014-07-22 | 2014-07-22 | Jacking hydraulic system and jacking method thereof and the method that returns back to top |
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| CN104100590B true CN104100590B (en) | 2016-04-27 |
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| CN106150106A (en) * | 2015-04-28 | 2016-11-23 | 中国二十冶集团有限公司 | A kind of just carrying the large-scale component pushing up and equipment high-altitude erecting device and installation method |
| CN105570212B (en) * | 2016-02-06 | 2017-11-24 | 上海建工五建集团有限公司 | The external hydraulic power unit of the hydraulic regulation bar of adaptive diagonal brace vertical adjustment |
| CN106351134B (en) * | 2016-11-02 | 2018-06-15 | 湖南联智桥隧技术有限公司 | Existing line box culvert is worn under one kind and synchronizes jacking system and jacking method |
| CN109723687A (en) * | 2017-10-30 | 2019-05-07 | 北京精密机电控制设备研究所 | A kind of hydraulic synchronization acting device and method |
| CN117850291A (en) * | 2023-11-03 | 2024-04-09 | 巢势科技(上海)有限公司 | Multi-node fine step synchronous jacking control system and control method thereof |
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| CN102704414A (en) * | 2012-06-25 | 2012-10-03 | 上海同罡建筑工程有限公司 | Construction method for jacking arched bridges |
| CN103511374A (en) * | 2012-06-29 | 2014-01-15 | 李志华 | PLC multipoint synchronous jacking-up hydraulic system |
| CN103629173A (en) * | 2013-11-28 | 2014-03-12 | 湖南联智桥隧技术有限公司 | Prestress tension hydraulic system, prestress tension device and control method of prestress tension device |
| CN103899587A (en) * | 2014-04-23 | 2014-07-02 | 湖南联智桥隧技术有限公司 | Synchronous jacking hydraulic control system |
| CN204003714U (en) * | 2014-07-22 | 2014-12-10 | 湖南联智桥隧技术有限公司 | Jacking hydraulic system |
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| CN104100590A (en) | 2014-10-15 |
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