CN1563726A - Hydraulic system for braking lifting platform and unloading when no load - Google Patents
Hydraulic system for braking lifting platform and unloading when no load Download PDFInfo
- Publication number
- CN1563726A CN1563726A CN 200410026067 CN200410026067A CN1563726A CN 1563726 A CN1563726 A CN 1563726A CN 200410026067 CN200410026067 CN 200410026067 CN 200410026067 A CN200410026067 A CN 200410026067A CN 1563726 A CN1563726 A CN 1563726A
- Authority
- CN
- China
- Prior art keywords
- valve
- oil
- oil cylinder
- pilot operated
- operated check
- 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
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The system can be applied on hydraulic pressure disappearing end bumper orchestra or stage for the theater, which prevent the leakage of the hydraulic system from the stage sinking. The function of zero load leakage is also considered. At the bottom of the cylinder, the inlet hole is connected with two outward leakage hydrocontrolled check valves is series connection. The oil drain is directly lead on the oil tank, the controlled oil way of the upper clappet is connected with the upper oilway main of the cylinder, the controlled oilway of the lower clappet is connected with the electro-magnetic reversing valve, which connects the oilway main, the superposition overflow valve and the superposition unidirection throttle, etc. In the twin-stage, the two cylinders drive separately and configured in shunt mode.
Description
Technical field
The present invention relates to the hydraulic control system of elevation and subsidence mechanical, be specially adapted to arenas hydraulic lifting orchestra or elevator stage.
Background technique
At present, known hydraulic driving raising platform have bearing capacity big, be convenient to control, regulate and be easy to advantage such as overload protection, be used on the lifting raising platform structure of arenas lifting orchestra or elevator stage and other occasion more.But, very high for the equipment of stopping between needing often after the table top rising to hydraulic seal and element precision with matching requirement, often can not solve the problem of sinking of leaking satisfactorily.Trace it to its cause, it all is owing to bear due to the one-way valve of cavity pressure under the oil cylinder leaks that most table tops sinks.The structure that adopts two one-way valves polyphones is also arranged in the design, but in the simple series arrangement fluid reality still has only a valve to work existing pressure that one valve can not reliably cut out between two valves, so do not prove effective.
Summary of the invention
The objective of the invention is the sinking that prevents that the raising platform hydraulic system from producing because of leakage, can carry out the unloaded drain charge of system simultaneously.
The present invention is raising platform braking and unloaded drain charge hydraulic system, cavity of resorption entry end at oil cylinder (7) inserts the formula that the leaks Pilot operated check valve (6) that two polyphones connect, its drain tap is directly introduced fuel tank (13), the control oil channel of the Pilot operated check valve (6) of upper end inserts the epicoele working connection of oil cylinder (7), the control oil channel of the Pilot operated check valve of lower end (6) inserts the solenoid directional control valve (8) that adds, working connection is advanced-returns in solenoid directional control valve (8) access in parallel, advancing-returning on the working connection simultaneously and connecing working connection overlapping relief valve (2), stacked unidirectional throttle valve (3), epicoele overlapping relief valve (4) and 3-position 4-way master solenoid directional control valve (5), its meta function is the Y type.When raising platform is the biplate platform, by two oil cylinders (7) when driving respectively, oil cylinder (7) two group oil cylinder systems identical with the structure that Pilot operated check valve (6) is formed are for being arranged in parallel.Stacked unidirectional throttle valve (3) is the bivalve core structure.
The invention has the beneficial effects as follows: the Pilot operated check valve of the formula that leaks is serially connected in oil cylinder lower oil cavitie filler opening, its upper end one-way valve control port connects cavity pressure oil, lower end one-way valve control port, and the lower end one-way valve is often opened when connecing the solenoid directional control valve that adds table top being risen, two one-way valves are successively all reliably closed during pressurize, has guaranteed that twin-lock does not have to leak to have exempted when table top is stopped.Work as pump start, still when meta, the solenoid directional control valve that adds is at electroless state for solenoid directional control valve, and fluid is by this valve and replenish the direct oil sump tank of pipeline, forms unloaded drain charge.
Description of drawings
Fig. 1 is raising platform braking and unloaded drain charge hydraulic system principle figure.Fig. 2 is an oil cylinder biplate platform hydraulic schematic diagram in parallel.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
As shown in Figure 1, cavity of resorption entry end at oil cylinder (7) inserts the formula that the leaks Pilot operated check valve (6) that two polyphones connect, its drain tap is directly introduced fuel tank (13), the control oil channel of the Pilot operated check valve (6) of upper end inserts the epicoele working connection of oil cylinder (7), the control oil channel of the Pilot operated check valve of lower end (6) inserts the solenoid directional control valve (8) that adds, working connection is advanced-returns in solenoid directional control valve (8) access in parallel, advancing-returning on the working connection simultaneously and connecing working connection overlapping relief valve (2), stacked unidirectional throttle valve (3), epicoele overlapping relief valve (4) and 3-position 4-way master solenoid directional control valve (5), its meta function is the Y type.
As shown in Figure 1, the no electricity of solenoid directional control valve (5) is parked in meta, and the no electricity of the solenoid directional control valve that adds (8) is parked in original position.When vane pump (1) startup, fluid can not pass through solenoid directional control valve (5) and pass through solenoid directional control valve (8)-additional pipeline (10) and oil purifier (12) inflow fuel tank (13), and this is unloaded drain charge state.Go up the electromagnet action when solenoid directional control valve (5) and desire to make oil cylinder (7) cavity of resorption oil-feed, this moment is because the drain charge effect, cavity of resorption still can not oil-feed, have only the solenoid directional control valve (8) of working as to get electronic work, draining is closed, fluid enters end valve control port under the Pilot operated check valve (6), make it be in normally open, the working connection oil pressure raises simultaneously, back down the last end valve of Pilot operated check valve (6) and enter oil cylinder (7) cavity of resorption, epicoele fluid is got back to fuel tank (13) through left valve core-solenoid directional control valve (the 5)-oil purifier (12) of stacked unidirectional throttle valve (3), and table top rises.
When rising, table top puts in place, when desire long period pressurize is stopped, solenoid directional control valve (5) dead electricity is returned meta, Pilot operated check valve (6) is gone up valve core and is closed automatically, main oil pipe road draining, and solenoid directional control valve (8) dead electricity in succession resets, system's drain charge, the following end valve of while Pilot operated check valve (6) controls oily draining valve core and cuts out, and two valves of the Pilot operated check valve (6) that be connected in series this moment work simultaneously, have guaranteed that table top does not have the leakage sinkage.
When desiring table top decline, solenoid directional control valve (5) lower electromagnet gets electronic work, working connection fluid desires to enter oil cylinder (7) epicoele, solenoid directional control valve (8) gets TURP and changes, the following valve of Pilot operated check valve (6) is often opened, last valve is opened under the effect of oil cylinder (7) upper cavity pressure oil, and the cavity of resorption oil return is got back to fuel tank (13) through the right valve core-solenoid directional control valve of stacked unidirectional throttle valve (3) (5)-oil purifier (12), and table top descends.
Stacked unidirectional throttle valve (3) is the bivalve core structure.The left and right sides valve core that is serially connected in the stacked unidirectional throttle valve (3) on the oil circuit is adjusted the speed that rises and descend respectively.
Overlapping relief valve (2) is set up the following cavity pressure of oil cylinder (7) when rising; Overlapping relief valve (4) is set up the upper cavity pressure of oil cylinder (7) when descending, and action of gravity has the load of surmounting during owing to decline, and overlapping relief valve (4) set pressure is much smaller than the set pressure of overlapping relief valve (2).
Pilot operated check valve (6) is installed on the oil cylinder (7) after being made up by custom-designed integrated package, and all the other valve pieces stacks are installed on the substrate (11), and working connection is provided with anti-shock pressure meter (9).
When raising platform is the biplate platform, when driving respectively, the two group oil cylinder systems that oil cylinder (7) is identical with the structure that Pilot operated check valve (6) is formed are arranged in parallel by two oil cylinders (7).
Claims (3)
1, raising platform braking and unloaded drain charge hydraulic system, cavity of resorption entry end at oil cylinder (7) inserts the formula that the leaks Pilot operated check valve (6) that two polyphones connect, its drain tap is directly introduced fuel tank (13), the invention is characterized in that the control oil channel of the Pilot operated check valve (6) of upper end inserts the epicoele working connection of oil cylinder (7), the control oil channel of the Pilot operated check valve of lower end (6) inserts the solenoid directional control valve (8) that adds, working connection is advanced-returns in solenoid directional control valve (8) access in parallel, advancing-returning on the working connection simultaneously and connecing working connection overlapping relief valve (2), stacked unidirectional throttle valve (3), epicoele overlapping relief valve (4) and 3-position 4-way master solenoid directional control valve (5), its meta function is the Y type.
2, raising platform braking according to claim 1 and unloaded drain charge hydraulic system, raising platform is the biplate platform, drive respectively by two oil cylinders (7), it is characterized in that two identical group oil cylinder systems of structure that oil cylinder (7) and Pilot operated check valve (6) form are for being arranged in parallel.
3, raising platform braking according to claim 1 and unloaded drain charge hydraulic system is characterized in that stacked unidirectional throttle valve (3) is the bivalve core structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100260679A CN1300473C (en) | 2004-04-08 | 2004-04-08 | Hydraulic system for braking lifting platform and unloading when no load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100260679A CN1300473C (en) | 2004-04-08 | 2004-04-08 | Hydraulic system for braking lifting platform and unloading when no load |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1563726A true CN1563726A (en) | 2005-01-12 |
| CN1300473C CN1300473C (en) | 2007-02-14 |
Family
ID=34480567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100260679A Expired - Fee Related CN1300473C (en) | 2004-04-08 | 2004-04-08 | Hydraulic system for braking lifting platform and unloading when no load |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1300473C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886643A (en) * | 2010-07-23 | 2010-11-17 | 吴旭 | Control valve special for hydraulic lifting of plunger cylinder |
| CN102182715A (en) * | 2011-05-20 | 2011-09-14 | 长沙中联重工科技发展股份有限公司 | Hydraulic control system, hydraulic control module thereof and engineering machinery with hydraulic control system |
| CN103267038A (en) * | 2013-05-09 | 2013-08-28 | 洛阳理工学院 | Hydraulic control loop capable of controlling multiple lifting platforms |
| CN104895858A (en) * | 2015-06-24 | 2015-09-09 | 海特克液压有限公司 | Control device with brake valve of actuating mechanism |
| CN110254656A (en) * | 2019-06-26 | 2019-09-20 | 武汉理工大学 | Shipping anti-collision system and method based on passive energy-absorbing |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2429346A1 (en) * | 1973-07-12 | 1975-03-06 | Werkzeugmasch Okt Veb | Controller for reciprocating hydraulic drive - connects hydraulic load to controlled valve via two operating lines |
| CN2359511Y (en) * | 1998-04-16 | 2000-01-19 | 中国科学院金属研究所 | Precision ultrasmicro-speed hydraulic control device |
| CN2373148Y (en) * | 1999-05-13 | 2000-04-12 | 沈阳液压件厂 | Control system for lifting revolving stage |
| AT410821B (en) * | 2001-01-12 | 2003-08-25 | Hoerbiger Hydraulik | ACTUATING ARRANGEMENT FOR PARTS ON VEHICLES WHICH CAN BE SWIVELED BY A AXLE |
| JP3849558B2 (en) * | 2002-03-20 | 2006-11-22 | 株式会社島津製作所 | Hydraulic welfare lifter |
-
2004
- 2004-04-08 CN CNB2004100260679A patent/CN1300473C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886643A (en) * | 2010-07-23 | 2010-11-17 | 吴旭 | Control valve special for hydraulic lifting of plunger cylinder |
| CN101886643B (en) * | 2010-07-23 | 2012-07-25 | 吴旭 | Control valve special for hydraulic lifting of plunger cylinder |
| CN102182715A (en) * | 2011-05-20 | 2011-09-14 | 长沙中联重工科技发展股份有限公司 | Hydraulic control system, hydraulic control module thereof and engineering machinery with hydraulic control system |
| CN102182715B (en) * | 2011-05-20 | 2012-11-14 | 中联重科股份有限公司 | Hydraulic control system, hydraulic control module thereof and engineering machinery with hydraulic control system |
| CN103267038A (en) * | 2013-05-09 | 2013-08-28 | 洛阳理工学院 | Hydraulic control loop capable of controlling multiple lifting platforms |
| CN103267038B (en) * | 2013-05-09 | 2017-02-08 | 洛阳理工学院 | Hydraulic control loop capable of controlling multiple lifting platforms |
| CN104895858A (en) * | 2015-06-24 | 2015-09-09 | 海特克液压有限公司 | Control device with brake valve of actuating mechanism |
| CN110254656A (en) * | 2019-06-26 | 2019-09-20 | 武汉理工大学 | Shipping anti-collision system and method based on passive energy-absorbing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1300473C (en) | 2007-02-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2010091597A1 (en) | Combined hydraulic control valve | |
| CN201554009U (en) | Piston-type double hanging point hydraulic headstock gear | |
| CN201581382U (en) | Electro-hydraulic proportional control piston type two-lifting-point hydraulic hoist | |
| CN106499682A (en) | A kind of hydraulic system for pile driving barge | |
| CN201982092U (en) | Height-adjusting hydraulic system of electric traction coal winning machine | |
| CN105257614B (en) | A kind of hydraulic jack high-precise synchronization control complexes of super large jumbo | |
| CN102155444A (en) | Hydraulic actuator for automatic drainage system of coal mine | |
| CN1300473C (en) | Hydraulic system for braking lifting platform and unloading when no load | |
| CN2931433Y (en) | Enclosed up-down hydraulic system | |
| CN202012516U (en) | Hydraulic actuator for automatic drainage system of coal mine | |
| CN206754027U (en) | A kind of plug-in integrated package of differential cylinder control | |
| CN109501376A (en) | A kind of double-pump type power device for garbage-compressing | |
| CN205190395U (en) | Hydraulic cylinder high -precision synchronization control integrated equipment of super large jumbo | |
| CN201517654U (en) | Automatic electro-hydraulic resetting device | |
| CN201346644Y (en) | Double-speed hydraulic drawing bench | |
| CN110410386A (en) | Hydraulic power lifting system of stereo bus garage | |
| JP2586563B2 (en) | 2-speed lift mechanism for industrial vehicles | |
| CN107725504B (en) | Hydraulic system capable of providing proper performance for load and hydraulic control method | |
| CN105545845A (en) | Hydraulic driving device of oversized heavy device | |
| CN2751168Y (en) | Energy-saving accelerating system for big-diameter hydraulic cylinder | |
| CN200968276Y (en) | Valve block integrated module used for concrete delivery pump | |
| CN106015125A (en) | Hydraulic system of bulldozer | |
| CN201588194U (en) | Piston single hoisting-point hydraulic hoist | |
| CN205190387U (en) | Hydraulic system that drive device rises | |
| CN221191363U (en) | Crane hoisting energy-saving device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |