CN105221499A - A kind of hydraulic control system of water conservancy hydraulic control multipurpose dam - Google Patents
A kind of hydraulic control system of water conservancy hydraulic control multipurpose dam Download PDFInfo
- Publication number
- CN105221499A CN105221499A CN201510552394.6A CN201510552394A CN105221499A CN 105221499 A CN105221499 A CN 105221499A CN 201510552394 A CN201510552394 A CN 201510552394A CN 105221499 A CN105221499 A CN 105221499A
- Authority
- CN
- China
- Prior art keywords
- valve
- way valve
- way
- hydraulic control
- dam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
A kind of hydraulic control system (25) of water conservancy hydraulic control multipurpose dam, it is characterized in that, comprise oil hydraulic pump (2), three-position four-way electromagnetic directional valve (4), relief valve (15) and Liang Ge actuator (9), two oil circuits of described single actuator (9) correspondence connect the dual hydraulic control one-way valve (16) be made up of type pilot one-way valve one (14), type pilot one-way valve two (17) respectively; Two oil circuits of type pilot one-way valve one (14), type pilot one-way valve two (17) are connected with two actuator ports of described three-position four-way electromagnetic directional valve (4) respectively, advantage of the present invention is: automatically can carry out flood discharge in dam by hydraulic control, the opening and closing of all right Non-follow control Ba Men simultaneously, can again no supervision when automatic flood discharge, a hydraulic pressure simultaneously? system can regulate and control many kinds of work position, meets the demand of various different occasion.
Description
Technical field
The invention belongs to hydraulic engineering technical field, be specifically related to a kind of water conservancy hydraulic control multipurpose dam and controlling party thereof
Method.
Background technique
Dam is block rivers ditch water flow with the water retaining structure of raising of water level or adjust flux.Can form reservoir, raising of water level, regulated flow, concentrated head, for flood control, water supply, irrigation, hydroelectric power, improve shipping etc.The river regulating structure of adjustment river gesture, protection bank bed also claims dam, such as groynes, longitudinal dike and ground sills etc.
A kind of small-sized automatic flood discharge and retaining check dam of Non-energy-consumption is disclosed in Chinese utility model patent as a patent No. ZL200420048618.7, it is characterized in that: the small-sized automatic flood discharge of Non-energy-consumption and the stop plank structure of retaining check dam, rotatingshaft above stop plank height is the twice that the following stop plank of rotatingshaft is high, the weight of the above stop plank of rotatingshaft and the weight sum of afterburning case, be less than the weight of the following stop plank of rotatingshaft, the afterburning case that stop plank top is equipped with is one the water storage box delaying afterburning effect.
Above-mentioned patent can be opened and closed according to water level conditions automatically by the stop plank of check dam, when check dam upper pool elevation reaches check dam design flood discharge water level, stop plank opens flood discharge automatically, when check dam upper pool elevation be down to check dam design close water level time, stop plank closes retaining again automatically.The opening and closing of stop plank, rely on the special construction of stop plank and check dam variation of water level and action, and the power needed for stop plank action is complete by self strength of water entirely, stop plank automatically open and close be one can the process of repetitive cycling automatically.
And for example application number CN201310232726.3, applying date 2013.9.11, mechanical type active catch dam is disclosed in the Chinese invention patent application of notification number CN103290815A, it is characterized in that, comprise dam basis (1), movable dam facing (2), bottom rotating shaft (3), the pre-buried fixed base in basis (4), Worm gear feed screw lift (5), pneumatic motor (6) and air compressor, the pre-buried fixed base in described basis (4) is arranged on dam basis (1), described bottom rotating shaft (3) is installed on basic pre-buried fixed base (4), described movable dam facing (2) is fixedly connected on bottom rotating shaft (3), described movable dam facing (2) can be rotated around bottom rotating shaft (3), the back side of one end flexible connection activity dam facing (2) of described Worm gear feed screw lift (5), the other end of described Worm gear feed screw lift (5) is flexibly connected basic pre-buried fixed base (4), described Worm gear feed screw lift (5) connects pneumatic motor (6), described pneumatic motor (6) connects air compressor.
Above-mentioned patent controls the folding of dam facing by mechanical type, and its complicated structure, does not have self according to the function of pressure auto-control simultaneously, need manual control to operate.
Summary of the invention
The present invention is directed to above shortcoming, need manual control folding based on the existing water conservancy dam of solution, automatically can not control the problem opening to regulate water levels of upstream and downstream.Propose a kind of water conservancy hydraulic control multipurpose dam and using method thereof, this dam can open and close automatically adjustment water level by hydraulic system induction dam internal pressure, also can be adjusted to Non-follow control, meet multiple demand.
For realizing object of the present invention, the technical solution used in the present invention is:
A kind of water conservancy hydraulic control multipurpose dam, comprises dam body, is located at the dam body crossbeam at dam body top, it is characterized in that: hydraulic control system is located at bottom the dam body of dam body crossbeam both sides, controls mounted thereto flexible of actuator by hydraulic control system; Dam plate is movably arranged between dam body, is connected bottom it by crossing coupling shaft with the actuator of both sides.
Preferentially, also comprise ramp structure, described ramp structure is laid in dam body periphery, and the step-down highly gradually laterally from dam body contacting point, often has mud to pile up at this outside dam, and this result can prevent from mud from piling up affecting dam plate opening.
The invention provides a kind of actuator that makes specially can the hydraulic control system of simultaneous retractable, comprise oil hydraulic pump, three-position four-way electromagnetic directional valve, relief valve and Liang Ge actuator, two oil circuits corresponding to described single actuator connect the dual hydraulic control one-way valve be made up of type pilot one-way valve one, type pilot one-way valve two respectively; Two oil circuits of type pilot one-way valve one, type pilot one-way valve two are connected with two actuator ports of described three-position four-way electromagnetic directional valve respectively, wherein: between type pilot one-way valve two and the oil circuit of three-position four-way electromagnetic directional valve, be also connected with one-way valve, flow control valve is serially connected with between type pilot one-way valve one and the oil circuit of three-position four-way electromagnetic directional valve, in addition, also be connected with oil circuit between type pilot one-way valve two and three-position four-way electromagnetic directional valve, the diverter valve of two flow control valve compositions is serially connected on this oil circuit; The pressure oil circuit of three-position four-way electromagnetic directional valve is connected with oil hydraulic pump and fuel tank respectively with return opening, and flow control valve is serially connected on the oil circuit that is connected between oil hydraulic pump with three-position four-way electromagnetic directional valve, and relief valve is connected in parallel on in-line.
Advantage ground, also comprise one-way valve one, one-way valve two and two position two-way valve, three is serially connected on the oil circuit between dual hydraulic control one-way valve and actuator, can realize automatic control like this.
Preferentially, three-position four-way electromagnetic directional valve and two position two-way valve are Non-follow control or Single-chip Controlling.
The automatic control opening and closing method on above-mentioned dam and principle, comprise the steps, (a) disable motor; B three-position four-way electromagnetic directional valve is in meta work by (); C () two position two-way valve is in the next work; D () setting actuator bears in dam and dam pressure outside peak value, and calculate oil mass in control closed circuit simultaneously, and guaranteeing that maximum angle opened by dam plate is 45 degree; When actuator outwards extends by dam internal pressure, fluid flow back on rear side of flexible rod by one-way valve one, and dam plate is open 0-45 degree automatic flood discharge; When actuator inwardly shortens by dam pressure outside, fluid flow back on front side of flexible rod by one-way valve two, and dam plate is closed automatically by external pressure.
The Non-follow control deployment method on above-mentioned dam, comprise the steps, a) three-position four-way electromagnetic directional valve is in the work of right position, b () two position two-way valve is in upper work, hydraulic oil in fuel tank to be entered by flow control valve, three-position four-way electromagnetic directional valve, diverter valve, type pilot one-way valve two by oil hydraulic pump and on rear side of the flexible rod of actuator, flexible rod extended dam plate is opened by (c) starting electrical machinery successively; Meanwhile, type pilot one-way valve one is also open, and the fluid in the flexible rod front of actuator flows through by oil circuit the type pilot one-way valve one that is open to be got back in fuel tank by three-position four-way electromagnetic directional valve.
The Non-follow control method for closing on above-mentioned dam, comprise the steps, a) three-position four-way electromagnetic directional valve is in the work of left position, b () two position two-way valve is in upper work, hydraulic oil in fuel tank to be entered by flow control valve, three-position four-way electromagnetic directional valve, flow control valve, type pilot one-way valve one by oil hydraulic pump and on front side of the flexible rod of actuator, flexible rod shortened dam plate is closed by (c) starting electrical machinery successively; Meanwhile, type pilot one-way valve two is also open, and the fluid at the flexible rod rear of actuator flows through by oil circuit the type pilot one-way valve two that is open to be got back in fuel tank by three-position four-way electromagnetic directional valve.
Compared with prior art, advantage of the present invention is: automatically can carry out flood discharge in dam by hydraulic control, the opening and closing of all right Non-follow control Ba Men simultaneously, can again no supervision when automatic flood discharge, a hydraulic system can regulate and control many kinds of work position simultaneously, meets the demand of various different occasion.
Accompanying drawing explanation
The following accompanying drawing by means of embodiment carries out brief description to the present invention now.In accompanying drawing:
Fig. 1 shows the structural representation on water conservancy hydraulic control multipurpose dam of the present invention;
Fig. 2 shows hydraulic schematic of the present invention.
In figure: 1, starting electrical machinery, 2, oil hydraulic pump, 3, flow control valve, 4, three-position four-way electromagnetic directional valve, 5, one-way valve, 6, diverter valve, 7, one-way valve one, 8, one-way valve two, 9, actuator, 10, two position two-way valve, 14, type pilot one-way valve one, 15, relief valve, 16, dual hydraulic control one-way valve, 17, type pilot one-way valve two, 20, dam body, 21, dam body crossbeam, 22, dam plate, 24, ramp structure, 25, hydraulic control system.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some distortion and improvement can also be made.These all belong to protection scope of the present invention.As described in Figure 1, a kind of water conservancy hydraulic control multipurpose dam, comprises dam body 20, is located at the dam body crossbeam 21 at dam body 20 top, hydraulic control system 25 is located at bottom the dam body 20 of dam body crossbeam 21 both sides, controls mounted thereto flexible of actuator 9 by hydraulic control system 25; Dam plate 22 is movably arranged between dam body 20, is connected bottom it by crossing coupling shaft with the actuator 9 of both sides, and actuator 9 can promote dam plate 22 and do the rotation of 0-45 degree.Also comprise ramp structure 24, it is peripheral that described ramp structure 24 is laid in dam body 20, the step-down highly gradually laterally from dam body 20 contacting point.
As described in Figure 2, hydraulic control system 25, comprise oil hydraulic pump 2, three-position four-way electromagnetic directional valve 4, relief valve 15 and Liang Ge actuator 9, two oil circuits of described single actuator 9 correspondence connect the dual hydraulic control one-way valve 16 be made up of type pilot one-way valve 1, type pilot one-way valve 2 17 respectively; Type pilot one-way valve 1, type pilot one-way valve 2 17 constitute dual hydraulic control one-way valve 16, and it achieves safe locking loop in systems in which, and actuator 9 can be made to stop in any position and prevent backward motion from causing danger.
Type pilot one-way valve 1, two oil circuits of type pilot one-way valve 2 17 are connected with two actuator ports of described three-position four-way electromagnetic directional valve 4 respectively, wherein: between the oil circuit of type pilot one-way valve 2 17 and three-position four-way electromagnetic directional valve 4, be also connected with one-way valve 5, flow control valve is serially connected with between the oil circuit of type pilot one-way valve 1 and three-position four-way electromagnetic directional valve 4, in addition, also oil circuit is connected with between type pilot one-way valve 2 17 and three-position four-way electromagnetic directional valve 4, the diverter valve 6 of two flow control valve compositions is serially connected on this oil circuit, two synchronous oil-feeds of oil circuit can be made like this, the fluid flow of two actuators 9 is equal, the action of actuator 9 is realized synchronous, the harmony of safety action.
The pressure oil circuit of three-position four-way electromagnetic directional valve 4 is connected with oil hydraulic pump 2 and fuel tank respectively with return opening, flow control valve 3 is serially connected on the oil circuit that is connected between oil hydraulic pump 2 with three-position four-way electromagnetic directional valve 4, flow control valve 3 valve port opens different sectional areas, regulate uninterrupted in pipeline, the speed of actuator 9 reciprocating action can be controlled.Relief valve 15 is connected in parallel on in-line, and when causing system pressure to increase due to reasons such as motor speed are too fast, when pressure is greater than relief valve valve port cracking pressure, relief valve 15 valve port is opened, and carries out safe off-load, ensures the safety of system.
In addition, also comprise one-way valve 1, one-way valve 28 and two position two-way valve 10, three is serially connected on the oil circuit between dual hydraulic control one-way valve 16 and actuator 9.Three-position four-way electromagnetic directional valve 4 and two position two-way valve 10 are Single-chip Controlling.
Automatically control opening and closing method and working principle based on this dam of said structure, comprise the steps, (a) disable motor 1; B three-position four-way electromagnetic directional valve 4 is in meta work by (); C () two position two-way valve 10 is in the next work; (d) setting actuator 9 to bear and dam pressure outside peak value on the dam in, and calculate oil mass in control closed circuit simultaneously, according to the waterline of required moisture storage capacity, calculate now dam body and need the angle of inclination, calculate the distance of extending required for flexible rod under this angle case, bar distance is multiplied by the number of the areal calculation oil pump capacity of piston, guaranteeing that maximum angle opened by dam plate 22 is 45 degree; When actuator 9 outwards extends by dam internal pressure, fluid flow back on rear side of flexible rod by one-way valve 1, and dam plate 22 is open 0-45 degree automatic flood discharge; When actuator 9 inwardly shortens by dam pressure outside, fluid flow back on front side of flexible rod by one-way valve 28, and dam plate 22 is closed automatically by external pressure.
Based on said structure this dam Non-follow control deployment method and working principle, comprise the steps, a three-position four-way electromagnetic directional valve 4 is in the work of right position by (), b () two position two-way valve 10 is in upper work, hydraulic oil in fuel tank to be entered by flow control valve 3, three-position four-way electromagnetic directional valve 4, diverter valve 6, type pilot one-way valve 2 17 by oil hydraulic pump 2 and on rear side of the flexible rod of actuator 9, flexible rod extended dam plate 22 is opened by (c) starting electrical machinery 1 successively; Meanwhile, type pilot one-way valve 1 is also open, and the fluid in the flexible rod front of actuator 9 flows through by oil circuit the type pilot one-way valve 1 that is open to be got back in fuel tank by three-position four-way electromagnetic directional valve 4.
Based on said structure this dam Non-follow control method for closing and working principle, comprise the steps, a three-position four-way electromagnetic directional valve 4 is in the work of left position by (), b () two position two-way valve 10 is in upper work, hydraulic oil in fuel tank to be entered by flow control valve 3, three-position four-way electromagnetic directional valve 4, flow control valve, type pilot one-way valve 1 by oil hydraulic pump 2 and on front side of the flexible rod of actuator 9, flexible rod shortened dam plate 22 is closed by (c) starting electrical machinery 1 successively; Meanwhile, type pilot one-way valve 2 17 is also open, and the fluid at the flexible rod rear of actuator 9 flows through by oil circuit the type pilot one-way valve 2 17 that is open to be got back in fuel tank by three-position four-way electromagnetic directional valve 4.
Claims (3)
1. the hydraulic control system (25) on a water conservancy hydraulic control multipurpose dam, it is characterized in that, comprise oil hydraulic pump (2), three-position four-way electromagnetic directional valve (4), relief valve (15) and Liang Ge actuator (9), two oil circuits of described single actuator (9) correspondence connect the dual hydraulic control one-way valve (16) be made up of type pilot one-way valve one (14), type pilot one-way valve two (17) respectively, type pilot one-way valve one (14), two oil circuits of type pilot one-way valve two (17) are connected with two actuator ports of described three-position four-way electromagnetic directional valve (4) respectively, wherein: between the oil circuit of type pilot one-way valve two (17) and three-position four-way electromagnetic directional valve (4), be also connected with one-way valve (5), flow control valve is serially connected with between the oil circuit of type pilot one-way valve one (14) and three-position four-way electromagnetic directional valve (4), in addition, also oil circuit is connected with between type pilot one-way valve two (17) and three-position four-way electromagnetic directional valve (4), the diverter valve (6) of two flow control valve compositions is serially connected on this oil circuit, the pressure oil circuit of three-position four-way electromagnetic directional valve (4) is connected with oil hydraulic pump (2) and fuel tank respectively with return opening, flow control valve (3) is serially connected on the oil circuit that is connected between oil hydraulic pump (2) with three-position four-way electromagnetic directional valve (4), and relief valve (15) is connected in parallel on in-line.
2. the hydraulic control system (25) on water conservancy hydraulic control multipurpose dam according to claim 1, it is characterized in that, also comprise one-way valve one (7), one-way valve two (8) and two position two-way valve (10), three is serially connected on the oil circuit between dual hydraulic control one-way valve (16) and actuator (9).
3. the hydraulic control system (25) on water conservancy hydraulic control multipurpose dam according to claim 1 and 2, is characterized in that, described three-position four-way electromagnetic directional valve (4) and two position two-way valve (10) are Non-follow control or Single-chip Controlling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510552394.6A CN105221499B (en) | 2014-10-01 | 2014-10-01 | Hydraulic control system for water-conservancy hydraulically-controlled multi-purpose dam |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510552394.6A CN105221499B (en) | 2014-10-01 | 2014-10-01 | Hydraulic control system for water-conservancy hydraulically-controlled multi-purpose dam |
| CN201410518178.5A CN104234015B (en) | 2014-10-01 | 2014-10-01 | A kind of water conservancy hydraulic control multipurpose dam and using method thereof |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410518178.5A Division CN104234015B (en) | 2014-10-01 | 2014-10-01 | A kind of water conservancy hydraulic control multipurpose dam and using method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105221499A true CN105221499A (en) | 2016-01-06 |
| CN105221499B CN105221499B (en) | 2017-04-12 |
Family
ID=52222849
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510552394.6A Expired - Fee Related CN105221499B (en) | 2014-10-01 | 2014-10-01 | Hydraulic control system for water-conservancy hydraulically-controlled multi-purpose dam |
| CN201410518178.5A Active CN104234015B (en) | 2014-10-01 | 2014-10-01 | A kind of water conservancy hydraulic control multipurpose dam and using method thereof |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410518178.5A Active CN104234015B (en) | 2014-10-01 | 2014-10-01 | A kind of water conservancy hydraulic control multipurpose dam and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN105221499B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110486341A (en) * | 2018-05-14 | 2019-11-22 | 博世力士乐（北京）液压有限公司 | Hydraulic control system and mobile working equipment |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112576557B (en) * | 2020-12-25 | 2022-11-15 | 四川川润液压润滑设备有限公司 | Reservoir water level hydraulic control system and use method thereof |
| CN116676920B (en) * | 2023-08-03 | 2023-09-26 | 常州市舜辰水利机械有限公司 | Movable flood control wall opening and closing equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000160539A (en) * | 1998-11-30 | 2000-06-13 | Shinko Sangyo Kk | Hydraulic device used for raising equipment of movable gate |
| CN201155495Y (en) * | 2007-12-10 | 2008-11-26 | 张明 | Water power automatic control shutter gate hydraulic system |
| CN201351643Y (en) * | 2009-02-12 | 2009-11-25 | 祝秋英 | Floodgate automatic control device |
| CN201495049U (en) * | 2009-09-29 | 2010-06-02 | 四川建设机械（集团）股份有限公司 | Jacking actuating unit for stacker crane |
| CN201581382U (en) * | 2009-11-16 | 2010-09-15 | 昆明理工大学 | Electro-hydraulic proportional control piston type two-lifting-point hydraulic hoist |
| CN102758421A (en) * | 2011-04-27 | 2012-10-31 | 扬州市飞龙气动液压设备有限公司 | Synchronous split-type hydraulic hoist |
| CN204151754U (en) * | 2014-10-01 | 2015-02-11 | 高田华 | A kind of water conservancy multipurpose dam and hydraulic control system thereof |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07207648A (en) * | 1994-01-21 | 1995-08-08 | Sanko Seisakusho:Kk | Inverted watergate equipment |
| CN2224684Y (en) * | 1995-03-14 | 1996-04-17 | 于立新 | Internal-external differential hydraulic pile hammer sequential direction changing oil path |
| CN1707033A (en) * | 2004-06-09 | 2005-12-14 | 上海海岳液压机电工程合作公司 | Stepless speed varying control method and system for hydraulic on/off machine with high pressure and great flow rate |
| CN102261056B (en) * | 2011-05-06 | 2013-01-30 | 衢州市河川翻板闸门有限公司 | Hydraulic control system of flap gate |
| CN202247813U (en) * | 2011-08-30 | 2012-05-30 | 扬州水安水工设备制造有限公司 | Hydraulic flat-slab deck dam |
| CN102995611A (en) * | 2011-09-19 | 2013-03-27 | 扬州蓝翔机电工程有限公司 | Hydraulic control turning steel dam gate |
| CN103485313A (en) * | 2012-06-14 | 2014-01-01 | 宋有良 | Fully-enclosed steel dam gate |
| CN102839638A (en) * | 2012-09-21 | 2012-12-26 | 江苏朝阳液压机械集团有限公司 | Hydraulic driving system for hydraulic driving bottom shaft rotating steel dam valve |
-
2014
- 2014-10-01 CN CN201510552394.6A patent/CN105221499B/en not_active Expired - Fee Related
- 2014-10-01 CN CN201410518178.5A patent/CN104234015B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000160539A (en) * | 1998-11-30 | 2000-06-13 | Shinko Sangyo Kk | Hydraulic device used for raising equipment of movable gate |
| CN201155495Y (en) * | 2007-12-10 | 2008-11-26 | 张明 | Water power automatic control shutter gate hydraulic system |
| CN201351643Y (en) * | 2009-02-12 | 2009-11-25 | 祝秋英 | Floodgate automatic control device |
| CN201495049U (en) * | 2009-09-29 | 2010-06-02 | 四川建设机械（集团）股份有限公司 | Jacking actuating unit for stacker crane |
| CN201581382U (en) * | 2009-11-16 | 2010-09-15 | 昆明理工大学 | Electro-hydraulic proportional control piston type two-lifting-point hydraulic hoist |
| CN102758421A (en) * | 2011-04-27 | 2012-10-31 | 扬州市飞龙气动液压设备有限公司 | Synchronous split-type hydraulic hoist |
| CN204151754U (en) * | 2014-10-01 | 2015-02-11 | 高田华 | A kind of water conservancy multipurpose dam and hydraulic control system thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110486341A (en) * | 2018-05-14 | 2019-11-22 | 博世力士乐（北京）液压有限公司 | Hydraulic control system and mobile working equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104234015A (en) | 2014-12-24 |
| CN104234015B (en) | 2016-01-20 |
| CN105221499B (en) | 2017-04-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102155447B (en) | Rotating hydraulic system of crane and rotating buffer valve thereof | |
| CN102425426B (en) | Energy-saving shield hydraulic feeding system for energy accumulator mounted on side of feeding oil inlet | |
| CN104234015B (en) | A kind of water conservancy hydraulic control multipurpose dam and using method thereof | |
| CN103062140B (en) | Hydraulic device on basis of confluence control mode | |
| CN103842663A (en) | Control system for operating work device for construction machine | |
| CN204126999U (en) | A kind of flat hydraulic control system of digging type grab bucket | |
| CN104632736A (en) | Two-degree-of-freedom rocking platform and hydraulic system thereof | |
| CN204151754U (en) | A kind of water conservancy multipurpose dam and hydraulic control system thereof | |
| CN202023782U (en) | Rotary hydraulic system of crane and rotary cushion valve of rotary hydraulic system | |
| CN104074816A (en) | Milling machine tail door control system and milling machine | |
| CN103790196B (en) | A kind of Hydraulic Excavator's Boom potential energy recovery control device | |
| CN103132557B (en) | Excavator and priority control loop of excavator | |
| RU137301U1 (en) | BULDOSER HYDRAULIC DRIVE | |
| CN104179460B (en) | The tower frame lifting device of rotary drill | |
| CN205207311U (en) | Meso position burden flow valve, swing arm energy -saving control system and excavator | |
| CN103470556A (en) | Multi-way valve converging hydraulic system and land leveler | |
| CN204164071U (en) | Trimmer valve, pumping system and concrete mixer | |
| CN204312423U (en) | Oil hydraulic cylinder slow travel-snap back circuits in hydraulic pressure installation | |
| CN109853491A (en) | Gate valve duct type fish pass structure | |
| CN203569609U (en) | Floating control device for shovel blade of grader | |
| CN204000789U (en) | The structure of downstream ecology flow is provided after lock under a kind of water conservancy diversion outlet structure escape works | |
| CN201614604U (en) | Grader scrapper knife floating device | |
| CN104179739A (en) | Dual-pump bidirectional confluence control system and fire truck adopting same | |
| CN205064414U (en) | Support hydraulic system behind TBM of single double pump mode switch and pressurize | |
| CN203488456U (en) | Multi-way valve flow converging hydraulic system and land leveler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Cao Feifeng Inventor after: Liu Junping Inventor before: Cao Feifeng Inventor before: Zhang Yi Inventor before: Li Xiaolong |
|
| CB03 | Change of inventor or designer information | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20170315 Address after: Hangzhou City, Zhejiang province 310014 City Zhaohui District Six Applicant after: Zhejiang University of Technology Address before: 310000 Xihu District, Zhejiang, Wensanlu Road 386-390, Xueyuan Road, No. 3, building, room 16, level 1609, 99 Applicant before: HANGZHOU YONGJI WATER SCIENCE AND TECHNOLOGY CO., LTD. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170412 Termination date: 20171001 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |