CN101586584A - A kind of high level, tall and slender structure construction creeping formwork hydraulic synchronous control system - Google Patents
A kind of high level, tall and slender structure construction creeping formwork hydraulic synchronous control system Download PDFInfo
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- CN101586584A CN101586584A CNA2008100376851A CN200810037685A CN101586584A CN 101586584 A CN101586584 A CN 101586584A CN A2008100376851 A CNA2008100376851 A CN A2008100376851A CN 200810037685 A CN200810037685 A CN 200810037685A CN 101586584 A CN101586584 A CN 101586584A
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Abstract
The invention provides a kind of high level, tall and slender structure construction creeping formwork hydraulic synchronous control system, comprise fuel tank, oil pump, transfer conduit system, two cover oil cylinder lifting body and synchronous control gear, this transfer conduit system comprises oil suction branch road, oil return branch road and solenoid directional control valve, every cover oil cylinder lifting body comprises jack, Pilot operated check valve and two-bit triplet control valve, and innovation part of the present invention is that each two-bit triplet control valve all has port, port that links to each other with corresponding jack and the port that links to each other with solenoid directional control valve that links to each other with sync control device; Under the "on" position, port that links to each other with sync control device and the port conducting that links to each other with jack, under the power failure state, port that links to each other with sync control device and the port conducting that links to each other with solenoid directional control valve.This construction creeping formwork hydraulic synchronous control system can solve at present well, and each jacking seat in the plane movement velocity speed differs, nonsynchronous problem, can control rising or falling speed automatically, guarantee that lifting is steadily synchronous.
Description
Technical field
The present invention relates to hydraulic synchronous system, relate in particular to the hydraulic synchronous control system of creeping formwork in the construction such as high-level structure core concrete, large bridge king-tower.
Background technique
China once mainly relied on import equipment in used hydraulic climbing formwork systems such as construction high level, superelevation layer, tall and slender structure core concrete, large bridge king-towers.But since the cost costliness, the domestic product that also begins to research and develop oneself.Shortcomings such as there is complex structure in domestic present technology, and function is perfect inadequately, and operation inconvenience and work rate are low.
Climbing form system operated by rotary motion two covers or two cover above jacking seats in the plane (oil cylinder lifting body), load in the system is not quite similar on each position, the resistance that is overcome when therefore can work owing to jacking in each jacking seat in the plane (oil cylinder lifting body) of climbing form system is different to cause that each jacking seat in the plane (oil cylinder lifting body) movement velocity speed differs, cumulative error will make climbing form system jam gently then occur, the work of can not normally climbing; Heavy then damage mechanism's component of climbing form system, engineering construction is caused very big influence.In order to solve the problem of synchronization lifting, external similar products mainly rely on regular inspection of the stacking of equipment, material on the strict control climbing form system and operator and regular manual setting deviation, this manual type not only limited climbing form system function of use, increased the weight of operator's working strength, also technical solution problem fundamentally not.External some company's appliance computer adds intelligent means such as sensor and carries out synchronization control, but has high input because of equipment eventually, system complex, and it is high that operation requires, and safeguards also difficulty, can not widely be accepted by domestic enterprise.
Summary of the invention
The technical issues that need to address of the present invention are to provide a kind of climbing form system hydraulic synchronous control system of realizing the lifting of automation synchronization control, simplied system structure.
In order to solve the problems of the technologies described above, the present invention has adopted following technological means:
A kind of high level, tall and slender structure construction creeping formwork hydraulic synchronous control system, comprise fuel tank, oil pump, transfer conduit system, two cover oil cylinder lifting bodies, an and synchronous control gear, described transfer conduit system comprises oil suction branch road, oil return branch road and solenoid directional control valve, described every cover oil cylinder lifting body comprises jack, Pilot operated check valve and two-bit triplet control valve, and described jack has rodless cavity and rod chamber; At oil cylinder lifting body ascent stage, hydraulic oil under the effect of oil pump from oil suction branch road, the solenoid directional control valve of fuel tank through the transfer conduit system, arrive the jack rodless cavity of oil cylinder lifting body again through sync control device, oil return is then flowed back to fuel tank from the jack rod chamber through solenoid directional control valve and oil return branch road; In the oil cylinder lifting body decline stage, fluid directly arrives the jack rod chamber of oil cylinder lifting body and rodless cavity fluid is flowed out through the transfer conduit system from fuel tank, gets back to fuel tank through solenoid directional control valve, the oil return branch road of transfer conduit system again; The two-bit triplet control valve of described every cover oil cylinder lifting body all has a port that links to each other with sync control device, a port that links to each other with corresponding jack and a port that links to each other with solenoid directional control valve; Under the "on" position, port that links to each other with sync control device and the port conducting that links to each other with jack, under the power failure state, port that links to each other with sync control device and the port conducting that links to each other with solenoid directional control valve.
At above-mentioned high level, in the tall and slender structure construction creeping formwork hydraulic synchronous control system, described sync control device is a synchronous valve, an one port is connected with the transfer conduit system, two ports are connected with the two-bit triplet control valve of oil cylinder lifting body by a control valve respectively in addition, between described transfer conduit system and synchronous valve, also be in series with a unidirectional series flow control valve, and this unidirectional series flow control valve carries the unidirectional return line of a parallel connection, when jacking needs speed governing, can regulate unidirectional series flow control valve and obtain the jacking speed that needs, fluid flows to synchronous valve from the transfer conduit system through unidirectional series flow control valve, finish a jacking, when oil cylinder need be withdrawn, in order to increase work efficiency, do not allow hydraulic oil pass through the speed governing end of unidirectional series flow control valve during the oil cylinder withdrawal, but directly allow hydraulic oil flow back to, thereby fully improve the working efficiency of system through unidirectional return line.
In above-mentioned high level, tall and slender structure construction creeping formwork hydraulic synchronous control system, described oil suction branch road is provided with an oil suction filter, and its inlet connects oil pump, and outlet is connected with described solenoid directional control valve with an oil sucting one-way valve successively; The oil return branch road is provided with a return filter, and it exports connected tank, and inlet is connected to described solenoid directional control valve by a return check valve.Described solenoid directional control valve is a 3-position 4-way H type valve, and two port is communicated with oil sucting one-way valve output terminal and return check valve input end respectively, and two ports link to each other with the jack rod chamber of sync control device and oil cylinder lifting body respectively in addition.
In above-mentioned high level, tall and slender structure construction creeping formwork hydraulic synchronous control system, described return check valve two ends reverse parallel connection one Fill valve, the pressure relief valve of also connecting between described oil sucting one-way valve and the return check valve.
In above-mentioned high level, tall and slender structure construction creeping formwork hydraulic synchronous control system, one end of described Pilot operated check valve links to each other with the two-bit triplet control valve by oil pipe, the other end links to each other with the jack rodless cavity, described Pilot operated check valve also has a pipeline that leads to the jack rod chamber, this pipeline a little is the remote control mouth with communicating of rod chamber, and remote control mouth place is provided with damper, produces the fluid impact endurance test shock to prevent climbing form system in the cylinder process that contracts from normally climbing under the effect of heavy load.
In above-mentioned high level, tall and slender structure construction creeping formwork hydraulic synchronous control system, described two-bit triplet control valve is a ball-valve structure.
The invention has the beneficial effects as follows, the selection of each valve is used and special Placement in oil cylinder lifting body, transfer conduit system and the sync control device, the realm of building construction that has not only overcome domestic high level, superelevation layer, tall and slender structure core concrete, large bridge king-tower etc. the difficult problem of form frame system synchronization lifting of climbing, also external simultaneously same category of device have that system is simple, Operation and Maintenance is easy and lower-cost advantage.
Description of drawings
Fig. 1 is the structural representation of two oil cylinder lifting body creeping formwork hydraulic synchronous control systems of the specific embodiment of the invention.
Embodiment
Below with reference to accompanying drawing high level of the present invention, tall and slender structure construction creeping formwork hydraulic synchronous control system are described in further detail, are specially following mode of execution:
As shown in Figure 1, present embodiment is high level, the tall and slender structure construction creeping formwork hydraulic synchronous control system of two cover oil cylinder lifting bodies, and this system comprises fuel tank 7, oil pump 8, transfer conduit system, two cover oil cylinder lifting bodies, and a synchronous control gear.This transfer conduit system comprises oil suction branch road L1, oil return branch road L2 and solenoid directional control valve 17, every cover oil cylinder lifting body comprises jack 18, Pilot operated check valve 2 and two-bit triplet control valve 4, and this jack 18 has rodless cavity (epicoele) and rod chamber (cavity of resorption).This sync control device is in series by synchronous valve 5 and unidirectional series flow control valve 6.
Two oil cylinder lifting bodies are installed on the mould bases support mechanism 1, jack 18, Pilot operated check valve 2 and two-bit triplet control valve 4 connect and compose the oil inlet passage of oil cylinder lifting body successively, high pressure hose 3 is arranged between Pilot operated check valve 2 and the two-bit triplet control valve 4, and (between jack 18 and the solenoid directional control valve 17) also is provided with a high pressure hose on the oil discharge passage of oil cylinder lifting body.The action of each oil cylinder is all controlled by this two-bit triplet control valve 4, concrete, this two-bit triplet control valve 4 is ball-valve structures, it has a port X who links to each other with sync control device, a port Y who links to each other with corresponding jack 18 and a port Z who links to each other with solenoid directional control valve 17, under the "on" position, X port and the conducting of Y port, under the power failure state, X port and the conducting of Z port.This two-bit triplet control valve 4 is used to control the break-make of fluid, selects for use ball valve that the response frequency raising of valve, leakage rate were prolonged near zero, life-span.Each two-bit triplet control valve 4 all adopts modular design, and volume is little, easy for installation.This Pilot operated check valve 2 can be realized the hydraulic lock function, when hydraulic pipe line runs into unexpected damaged the leakage, oil cylinder still can support weight, guarantee the Security of synchronization of jacking up, Pilot operated check valve 2 in addition can be with carrying a function of changing flexible pipe 3 when load support simultaneously, this Pilot operated check valve 2 is a ball-valve structure, and pilot operated, hydraulic pressure directly moves, and leaks almost nil.Select 10 tons (during 200bar) of carrying for use, range is the oil cylinder of 250mm.
Oil suction branch road L1 is provided with oil suction filter 13, its inlet connects oil pump 8, and outlet is connected with the P end of oil sucting one-way valve 14 and solenoid directional control valve 17 successively, and oil return branch road L2 is provided with return filter 10, it exports connected tank 7, and inlet is connected to the R end of solenoid directional control valve 17 by return check valve 12.This solenoid directional control valve 17 is 3-position 4-way solenoid directional control valves, its output terminal B end and A end are connected to jack 18 rod chambers of oil cylinder lifting body and the unidirectional series flow control valve 6 in the sync control device respectively, in addition, also be parallel with a pressure relief valve 16 between the P of solenoid directional control valve 17 end and the R end.Return check valve 12 cracking pressures are set in 3.5bar, make system pipeline be full of oil all the time, prevent sneaking into of air, improve the speed of response of system and carry out precision.Two ends reverse parallel connection one Fill valve 11 of return check valve 12, when a certain oil cylinder pauses because of a variety of causes, but the form frame system that climbs works on because of the jacking of other oil cylinders, the oil cylinder that the mould bases of jacking can drive pause works on, promptly the action of oil cylinder piston must need hydraulic oil to replenish at this moment, otherwise will cause to vacuumize and damage pipeline and equipment, so, this repairing oil suction system designed on the pipeline cleverly.System pressure safety valve 16 front ends are provided with pressure gauge 15, and by regulating the working pressure that pressure relief valve 16 (relief valve) can initialization system, when because load variations when causing overpressure, system's automatic overflow is guaranteed the safety of each workpiece of system.Oil suction, return filter 10,13 have cleanliness of hydraulic oil self check sender function, to guarantee the cleaning of fluid.
At two oil cylinder lifting bodies, in sync control device, select synchronous valve 5 for use, the control end of the two-bit triplet control valve 4 of each oil cylinder lifting body all is connected with synchronous valve 5, rising or falling speed information and the instruction of fluid break-make are all by the guide line transmission, so the synchronization control of system relies on the information processing of synchronous valve 5 and inner actuator to finish automatically fully.Synchronous valve 5 front ends are connected with the unidirectional series flow control valve 6 of highi degree of accuracy, can adjust different speed as required, and the mould bases speed as required of climbing is climbed.Unidirectional series flow control valve 6 the other ends are connected with the A port of solenoid directional control valve 17, and in addition, this unidirectional series flow control valve 6 carries the unidirectional return line 19 of a parallel connection.When jacking needs speed governing, can regulate unidirectional series flow control valve 6 and obtain the jacking speed that needs, hydraulic oil enters unidirectional series flow control valve 6 by the A port of solenoid directional control valve 17 and flows to synchronous valve 5 again, finish a jacking, when oil cylinder need be withdrawn,, do not allow hydraulic oil pass through the speed governing end of unidirectional series flow control valve 6 during the oil cylinder withdrawal in order to increase work efficiency, but directly allow hydraulic oil flow back to, thereby fully improve the working efficiency of system through unidirectional return line 19.
In oil cylinder lifting body uphill process, motor 9 and oil pump 8 are supplied with hydraulic oil, process oil suction filter 13 and solenoid directional control valve 17 and sync control device enter jack 18 rodless cavities of oil cylinder lifting body, at this moment, two-bit triplet control valve 4 is in "on" position, be X port and the conducting of Y port, hydraulic oil lifts mould bases support mechanism 1 by jack 18; Oil return is then flowed back to fuel tank 7 from jack 18 rod chambers behind solenoid directional control valve 17, return check valve 12, return filter 10.In the uphill process, if two oil cylinder speed accumulated deficiencies surpass setting value, will underspeed the automatically rate of climb of that too fast relatively oil cylinder of sync control device, the speed for the treatment of are adjusted when consistent, and oil cylinder continues to rise synchronously.
The decline process of oil cylinder lifting body under the effect of heavy duty, realizes that hydraulic oil refluxes by the switching of solenoid directional control valve 17 directions.In the reflux course, change the oil circuit direction by solenoid directional control valve 17, fluid through jack 18 rod chambers, flows back to fuel tank 7 from jack 18 oil cylinder rodless cavities through the R mouth of Pilot operated check valve 2, two-bit triplet control valve 4, solenoid directional control valve 17 from solenoid directional control valve 17 more again behind return check valve 12 and return filter 10.
In addition, this Pilot operated check valve 2 also has a pipeline that leads to jack 18 rod chambers, communicating of this pipeline and rod chamber a little is the remote control mouth, and remote control mouth place is provided with damper, produces the fluid impact endurance test shock to prevent climbing form system in the cylinder process that contracts from normally climbing under the effect of heavy load.
Claims (10)
1. a high level, tall and slender structure construction creeping formwork hydraulic synchronous control system, comprise fuel tank, oil pump, transfer conduit system, two cover oil cylinder lifting bodies, an and synchronous control gear, described transfer conduit system comprises oil suction branch road, oil return branch road and solenoid directional control valve, described every cover oil cylinder lifting body comprises jack, Pilot operated check valve and two-bit triplet control valve, and described jack has rodless cavity and rod chamber; At oil cylinder lifting body ascent stage, hydraulic oil under the effect of oil pump from oil suction branch road, the solenoid directional control valve of fuel tank through the transfer conduit system, arrive the jack rodless cavity of oil cylinder lifting body again through sync control device, oil return is then flowed back to fuel tank from the jack rod chamber through solenoid directional control valve and oil return branch road; In the oil cylinder lifting body decline stage, fluid directly arrives the jack rod chamber of oil cylinder lifting body and rodless cavity fluid is flowed out through the transfer conduit system from fuel tank, gets back to fuel tank through solenoid directional control valve, the oil return branch road of transfer conduit system again; It is characterized in that: the two-bit triplet control valve of described every cover oil cylinder lifting body all has a port that links to each other with sync control device, a port that links to each other with corresponding jack and a port that links to each other with solenoid directional control valve; Under the "on" position, port that links to each other with sync control device and the port conducting that links to each other with jack, under the power failure state, port that links to each other with sync control device and the port conducting that links to each other with solenoid directional control valve.
2. high level as claimed in claim 1, tall and slender structure construction creeping formwork hydraulic synchronous control system, it is characterized in that, described sync control device is a synchronous valve, an one port is connected with the transfer conduit system, and two ports are connected with the two-bit triplet control valve of oil cylinder lifting body by a control valve respectively in addition.
3. high level as claimed in claim 2, tall and slender structure construction creeping formwork hydraulic synchronous control system, it is characterized in that, between described transfer conduit system and synchronous valve, be in series with a unidirectional series flow control valve, when jacking needs speed governing, can regulate unidirectional series flow control valve and obtain the jacking speed that needs, fluid flows to synchronous valve from the transfer conduit system through series flow control valve.
4. high level as claimed in claim 3, tall and slender structure construction creeping formwork hydraulic synchronous control system, it is characterized in that, described unidirectional series flow control valve carries the unidirectional return line of a parallel connection, finish a jacking, when oil cylinder need be withdrawn, hydraulic oil is without the speed governing end of unidirectional series flow control valve, but this unidirectional return line of process flows back to.
5. high level as claimed in claim 1, tall and slender structure construction creeping formwork hydraulic synchronous control system is characterized in that described oil suction branch road is provided with an oil suction filter, and its inlet connects oil pump, and outlet is connected with described solenoid directional control valve with an oil sucting one-way valve successively; The oil return branch road is provided with a return filter, and it exports connected tank, and inlet is connected to described solenoid directional control valve by a return check valve.
6. high level as claimed in claim 5, tall and slender structure construction creeping formwork hydraulic synchronous control system, it is characterized in that, described solenoid directional control valve is a 3-position 4-way H type valve, two port is communicated with oil sucting one-way valve output terminal and return check valve input end respectively, and two ports link to each other with the jack rod chamber of sync control device and oil cylinder lifting body respectively in addition.
7. high level as claimed in claim 5, tall and slender structure construction creeping formwork hydraulic synchronous control system is characterized in that described return check valve two ends reverse parallel connection one Fill valve, the pressure relief valve of also connecting between described oil sucting one-way valve and the return check valve.
8. high level as claimed in claim 1, tall and slender structure construction creeping formwork hydraulic synchronous control system, it is characterized in that, one end of described Pilot operated check valve links to each other with the two-bit triplet control valve by oil pipe, the other end links to each other with the jack rodless cavity, described Pilot operated check valve also has a pipeline that leads to the jack rod chamber, and this pipeline a little is the remote control mouth with communicating of rod chamber.
9. high level as claimed in claim 8, tall and slender structure construction creeping formwork hydraulic synchronous control system, it is characterized in that, the place is provided with damper at Pilot operated check valve remote control mouth, prevents that climbing form system from producing the fluid impact endurance test shock in the cylinder process that contracts from normally climbing under the effect of heavy load.
10. high level as claimed in claim 1, tall and slender structure construction creeping formwork hydraulic synchronous control system is characterized in that described two-bit triplet control valve is a ball-valve structure.
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| CN102116327A (en) * | 2009-12-30 | 2011-07-06 | 徐州重型机械有限公司 | Hydraulic valve and double variable-amplitude oil cylinder control system applying same |
| CN102345381A (en) * | 2011-10-12 | 2012-02-08 | 四川路桥建设股份有限公司 | Hydraulic creeping formwork system and creeping formwork construction method |
| CN102852871A (en) * | 2012-09-19 | 2013-01-02 | 中国核动力研究设计院 | Hydraulic system for jacking top cover in loosening reactor top cover |
| CN103613047A (en) * | 2013-11-27 | 2014-03-05 | 中国航空工业集团公司西安飞机设计研究所 | Four-stand-bar synchronous hydraulic lifting mechanism |
| CN103742469A (en) * | 2013-11-28 | 2014-04-23 | 成都欧浦特控制阀门有限公司 | Hydraulic system |
| CN103895190A (en) * | 2012-12-29 | 2014-07-02 | 鸿富锦精密工业（深圳）有限公司 | Shearing jig |
| CN104003326A (en) * | 2013-05-22 | 2014-08-27 | 芜湖高昌液压机电技术有限公司 | Series synchronization of hydraulic oil cylinder of automobile lifter |
| CN106704279A (en) * | 2015-11-13 | 2017-05-24 | 昆明顺吉科技有限公司 | Hydraulic control system and main control valve thereof for seedling transplanter |
| CN107676319A (en) * | 2017-11-14 | 2018-02-09 | 重庆大江工业有限责任公司 | A kind of supporting leg synchronization hydraulic system of autocrane four |
| CN109185246A (en) * | 2018-11-22 | 2019-01-11 | 徐工消防安全装备有限公司 | Hydraulic control system and aerial working platform vehicle |
| CN110092143A (en) * | 2019-05-21 | 2019-08-06 | 中国矿业大学(北京) | A kind of height-adjustable belt conveyer for coal mine |
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| CN110510540A (en) * | 2019-09-19 | 2019-11-29 | 成都立航科技股份有限公司 | A kind of type aircraft jacking hydraulic system |
| CN110657132A (en) * | 2018-06-12 | 2020-01-07 | 宝钢工程技术集团有限公司 | Ladle lifting valve platform with high-pressure filter and using method thereof |
| CN112228418A (en) * | 2020-11-26 | 2021-01-15 | 太重集团榆次液压工业(济南)有限公司 | Hydraulic synchronization system based on volume control and control method |
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| CN113428802A (en) * | 2021-05-24 | 2021-09-24 | 上海交通大学 | Pressure self-balancing hydraulic cooperative jacking device |
| CN113428803A (en) * | 2021-05-25 | 2021-09-24 | 上海交通大学 | Motion compensation type double-ship cooperative hydraulic jacking device |
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| CN102116327A (en) * | 2009-12-30 | 2011-07-06 | 徐州重型机械有限公司 | Hydraulic valve and double variable-amplitude oil cylinder control system applying same |
| CN102345381A (en) * | 2011-10-12 | 2012-02-08 | 四川路桥建设股份有限公司 | Hydraulic creeping formwork system and creeping formwork construction method |
| CN102345381B (en) * | 2011-10-12 | 2013-08-14 | 四川路桥建设股份有限公司 | Hydraulic creeping formwork system and creeping formwork construction method |
| CN102852871B (en) * | 2012-09-19 | 2014-12-10 | 中国核动力研究设计院 | Hydraulic system for jacking top cover in loosening reactor top cover |
| CN102852871A (en) * | 2012-09-19 | 2013-01-02 | 中国核动力研究设计院 | Hydraulic system for jacking top cover in loosening reactor top cover |
| CN103895190A (en) * | 2012-12-29 | 2014-07-02 | 鸿富锦精密工业（深圳）有限公司 | Shearing jig |
| CN104003326A (en) * | 2013-05-22 | 2014-08-27 | 芜湖高昌液压机电技术有限公司 | Series synchronization of hydraulic oil cylinder of automobile lifter |
| CN103613047A (en) * | 2013-11-27 | 2014-03-05 | 中国航空工业集团公司西安飞机设计研究所 | Four-stand-bar synchronous hydraulic lifting mechanism |
| CN103742469A (en) * | 2013-11-28 | 2014-04-23 | 成都欧浦特控制阀门有限公司 | Hydraulic system |
| CN106704279A (en) * | 2015-11-13 | 2017-05-24 | 昆明顺吉科技有限公司 | Hydraulic control system and main control valve thereof for seedling transplanter |
| CN106704279B (en) * | 2015-11-13 | 2018-05-29 | 昆明顺吉科技有限公司 | Seeding transplant machine hydraulic control system |
| CN107676319A (en) * | 2017-11-14 | 2018-02-09 | 重庆大江工业有限责任公司 | A kind of supporting leg synchronization hydraulic system of autocrane four |
| CN110657132A (en) * | 2018-06-12 | 2020-01-07 | 宝钢工程技术集团有限公司 | Ladle lifting valve platform with high-pressure filter and using method thereof |
| CN109185246A (en) * | 2018-11-22 | 2019-01-11 | 徐工消防安全装备有限公司 | Hydraulic control system and aerial working platform vehicle |
| CN109185246B (en) * | 2018-11-22 | 2024-06-07 | 徐工消防安全装备有限公司 | Hydraulic control system and aerial work platform truck |
| CN110092143A (en) * | 2019-05-21 | 2019-08-06 | 中国矿业大学(北京) | A kind of height-adjustable belt conveyer for coal mine |
| CN110439870A (en) * | 2019-08-12 | 2019-11-12 | 四川泓江美欣环卫科技有限公司 | Mobile garbage compressor station hydraulic system |
| CN110510540A (en) * | 2019-09-19 | 2019-11-29 | 成都立航科技股份有限公司 | A kind of type aircraft jacking hydraulic system |
| CN110510540B (en) * | 2019-09-19 | 2024-02-13 | 成都立航科技股份有限公司 | Aircraft jacking hydraulic system |
| CN112228418A (en) * | 2020-11-26 | 2021-01-15 | 太重集团榆次液压工业(济南)有限公司 | Hydraulic synchronization system based on volume control and control method |
| CN113062946A (en) * | 2021-04-10 | 2021-07-02 | 南京工程学院 | Single-bag gas-liquid linkage intelligent damping device for base of large coal mill and control method of single-bag gas-liquid linkage intelligent damping device |
| CN113428802A (en) * | 2021-05-24 | 2021-09-24 | 上海交通大学 | Pressure self-balancing hydraulic cooperative jacking device |
| CN113428802B (en) * | 2021-05-24 | 2022-07-29 | 上海交通大学 | Pressure self-balancing hydraulic cooperative jacking device |
| CN113428803A (en) * | 2021-05-25 | 2021-09-24 | 上海交通大学 | Motion compensation type double-ship cooperative hydraulic jacking device |
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Application publication date: 20091125 |