CN109737110A - A kind of small-sized fore-and-aft gangway based on hydraulic system - Google Patents

A kind of small-sized fore-and-aft gangway based on hydraulic system Download PDF

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CN109737110A
CN109737110A CN201811307078.2A CN201811307078A CN109737110A CN 109737110 A CN109737110 A CN 109737110A CN 201811307078 A CN201811307078 A CN 201811307078A CN 109737110 A CN109737110 A CN 109737110A
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valve
rolling
pitching
output end
pipeline
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CN109737110B (en
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陈懿
郭安罗
王江
梁兆环
刘忠饶
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South China Marine Machinery Co Ltd
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South China Marine Machinery Co Ltd
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Abstract

The invention discloses the small-sized fore-and-aft gangways based on hydraulic system, including mechanical part and hydraulic system；Mechanical part includes pedestal, pivoting support, revolving platform, rotary motion mechanism, fixed channel, Telescopic path, amplitude oil cylinder, telescopic oil cylinder and docking facilities.Hydraulic system includes main oil supply system, permanent thrust accumulator system, rolling compensation system, pitch compensation system, telescopic system and rotary system.Overlap joint using structure , Walk bridge of the invention is reliable, safe, high-efficient, and energy Shi Xian Walk bridge is servo-actuated after the completion of overlap joint, realizes smoothly remarkable and transport goods, while being able to achieve better servo-actuated and compensation by hydraulic system.

Description

A kind of small-sized fore-and-aft gangway based on hydraulic system
Technical field
This invention She is Ji Walk bridge.
Background technique
Walk bridge or trestle are mainly used to conveying personnel or cargo, and in land, the construction of , Walk bridge is relatively easy, but use exists Marine builds with regard to relative difficult for conveying personnel and goods and materials Walk bridge between two ships, because, between ship and ship It mutually moves, is generally built on a ship because of Ci , Walk bridge, if necessary to use, by overlapped mode in two ships Between She Zhi Walk bridge.And during the lapping process, to realize better overlap joint, it is necessary to the phase between Kao Lv Walk bridge and another ship To position, otherwise can because of ship floating and make into Walk bridge and foul；After the completion of overlap joint, also need to consider between two ships Relative position, allow Walk bridge to be in the state that passively compensates according to the relative position of two ships, in this way, just can guarantee normally makes With；In addition, be in an emergency Xia , Walk bridge and another ship to be able to achieve ejection escape, to guarantee security performance.
A kind of fore-and-aft gangway device, including base are disclosed in the patent document that Chinese Patent Application No. is 201510045917.8 Seat and the revolving platform being mounted on above the pedestal, the revolving platform are connected by swing mechanism with the pedestal, institute It states and is provided with driver's cabin on revolving platform, the revolving platform is connected with fore-and-aft gangway, and the two sides of the fore-and-aft gangway have safety barrier, The suspension end of the fore-and-aft gangway is provided with docking facilities.The present invention is compared to the prior art, and reasonable structural arrangement, operation are flat Surely, conveying people between ship and ocean platform can be being realized under complicated, adverse circumstances.Shang Shu Walk Biodge device, although can be real Personnel and Material Transportation between spot oceangoing ship, but Da Jie Walk Biodge device and Da Jie Walk Biodge device Hou , Walk Biodge device cannot root The problems such as carrying out corresponding change in location according to the change in location between ship, be easy to appear accident, and in emergency circumstances , Walk Bridge can not carry out ejection escape.
A kind of full hydraulic drive is disclosed in the patent document that Chinese Patent Application No. is 200610049538.7 to go on board Ladder, by be fixed on the main ladder that constitutes on harbour with the ladder for running ladder with can activity on the face of boat deck with triangle ladder, gangway ladder Auxiliary ladder composition, the auxiliary ladder by connected on slide and slide luffing, rotating mechanism, hydraulic station, pulley device and be fixed on code Hoisting mechanism on head is constituted, and lift cylinder goes up and down the pulley device on slide along the I-steel guide rail on ladder, slide On rotating platform in the horizontal plane around center axis rotation, the hinged gangway ladder in rotating platform front end, flexible by amplitude oil cylinder makes Support of the gangway ladder on rotating platform rotates on the vertical plane, and the height of adjusting triangle ladder, gangway ladder, rotary oil cylinder makes gangway ladder in water It is rotated within the scope of 120 degree of plane, hydraulic station, luffing, rotating mechanism are gone up and down in slide and with slide, compact-sized, simplified Oil circuit reduces oil pipe, and use is safe and reliable, and the stability of synchronization is good for work, high sensitivity, particularly suitable in oil product, chemical industry code Meets the needs of drop changes greatly on head.Although above structure produces certain benefit, but ship is operation or rests in Waterborne, due to the influence of factors, ship can generate heave, shaking etc., therefore bring very big trouble to overlap joint, and And after overlapping, if auxiliary ladder can not achieve servo-actuated, it is easily damaged boarding ladder, can not carry out smoothly remarkable and transports object Money.
A kind of Three Degree Of Freedom wave benefit is disclosed in the patent document that Chinese Patent Application No. is 201611205250.4 Repay to step on and multiply trestle, technical solution is: it includes: base platform, control system, attitude transducer, trestle support, and trestle is logical Road, amplitude oil cylinder, rolling compensating cylinder；Ship rolling, pitching, heave movement are mended in real time although the present invention can be realized It repays, but changes not record in technical solution be how to control amplitude oil cylinder, rolling compensating cylinder, which is accomplished that Active Compensation, after trestle channel has overlapped, it is necessary to it is controlled by control system, and when control system needs certain reaction Between, therefore, the phenomenon that being easy to appear delays time to control, while it is also big to consume energy, and the heavier-weight in trestle channel, when trestle channel After putting up, the weight in trestle channel is largely fallen in overlapped points.
A kind of marine transportation and sea are disclosed in the patent document that Chinese Patent Application No. is 201610396070.2 It being stepped on compensation of undulation function by device and method in shipping work field, stepping on forward, gangway ladder is perpendicular to deck and fixed connects Gangway ladder bracket is connect, motion controller first controls active compensation of undulation platform to the rolling of ship, pitching and heave real-time compensation, then Motor reversal is controlled, motor drives wirerope to discharge gangway ladder, and gangway ladder rotates counterclockwise around universal joint, when gangway ladder angular transducer is examined Measure gangway ladder with respect to upper mounting plate release rotate to predetermined angle when, motor shuts down；It steps on after leaning on, motion controller control Motor rotates forward, when gangway ladder angular transducer detects that gangway ladder rotates to predetermined angle with respect to upper mounting plate, gangway ladder perpendicular to deck, Gangway ladder is fixed on gangway ladder bracket；The rolling, pitching and heave of compensation of undulation platform real-time compensation ship in severe sea situation, Automatic deploying and retracting gangway ladder just carries out folding and unfolding when compensating for upper mounting plate to certain steady state, improve step on by when stationarity and peace Quan Xing.The structure is that the position of platform is adjusted by active compensation of undulation, then realizes overlap joint, and since ship is to shake, It is difficult to ensure the position between gangway ladder and ship during the lapping process, overlap joint is very difficult, after overlap joint, if gangway ladder cannot be real It is now servo-actuated, is then easily damaged the structure, can not carry out smoothly remarkable and transport goods and materials.
For little Xing Walk bridge, weight is relatively light very much, and it is convenient to use, and during the lapping process, generallys use Fast junction apparatus is docked, but in actual application, due to the rolling of hull, Mu Qian Walk bridge can be carried out Better rolling compensation.In addition, the reason of because of control system and hydraulic system, the job insecurity of Zao Cheng Walk bridge.
Summary of the invention
The object of the present invention is to provide a kind of small-sized fore-and-aft gangway based on hydraulic system, utilizes structure , Walk bridge of the invention Overlap it is reliable, safe, high-efficient, after the completion of overlap joint can Shi Xian Walk bridge it is servo-actuated, realize smoothly remarkable and transport goods, pass through Hydraulic system is able to achieve preferably servo-actuated and compensation.
In order to achieve the above objectives, a kind of small-sized fore-and-aft gangway based on hydraulic system, including mechanical part, general control system and liquid Pressure system；
Mechanical part includes pedestal, pivoting support, revolving platform, rotary motion mechanism, fixed channel, Telescopic path, change Width oil cylinder, telescopic oil cylinder and docking facilities；
Revolving platform is mounted on pivoting support；Rotary motion mechanism include the rotary motor being mounted on revolving platform, The speed changer being mounted on rotary motor output shaft and the gear being mounted on transmission output shaft, gear are nibbled with pivoting support It closes；Fixed channel is hinged on revolving platform；Telescopic path is slidably mounted on fixed channel；Amplitude oil cylinder is hinged on revolution Between platform and fixed channel；Telescopic oil cylinder is hinged between fixed channel and Telescopic path；Docking facilities are mounted on flexible logical The free end in road；
It is hinged with rolling platform on pedestal, rolling oil cylinder is hinged between pedestal and rolling platform；Pivoting support peace On rolling platform；
For mechanical part, if rotary motor works, rotary motor rotates by transmission belt moving gear, gear and Pivoting support effect, so that revolving platform, fixed channel, Telescopic path, docking facilities, amplitude oil cylinder and telescopic oil cylinder integrally revolve Turn, realizes the revolution movement of docking facilities.If amplitude oil cylinder works, then fixed channel, Telescopic path and docking facilities pendulum are driven It is dynamic.If telescopic oil cylinder works, Telescopic path is flexible relative to fixed channel.In the present invention, due to be provided with rolling platform and Rolling oil cylinder, therefore, docking facilities can be opposing stationary relative to the part being overlapped, and realize smoothly remarkable and transport goods.
The hydraulic system includes main oil supply system, permanent thrust accumulator system, rolling compensation system, pitch compensation system System, telescopic system and rotary system；
Main oil supply system includes fuel tank, the first hydraulic pump being connected on fuel tank and the second hydraulic pump；First hydraulic pump is logical Motor M1 drive is crossed, the second hydraulic pump is driven by motor M2；The output end of first hydraulic pump and the second hydraulic pump collects to be formed Total output end；
After motor M1 and motor M2 starts, the first hydraulic pump and the second hydraulic pump startup pump out hydraulic oil from fuel tank To total output end.Using multiple hydraulic pumps, the oil pressure and flow in hydraulic system can be improved, while ought wherein damage a hydraulic pump Wound, hydraulic pump in addition can play the role of emergency.
Permanent thrust accumulator system is connected to total output end, and permanent thrust accumulator has output end PP；Permanent thrust accumulator System is used to provide permanent thrust to telescopic oil cylinder, allows telescopic oil cylinder to move in servomechanism process more steady, to allow flexible The movement in channel is steady.
Rolling compensation system includes rolling electricity proportional reversing valve and rolling combination valve block, rolling electricity proportional reversing valve with it is total defeated Outlet connection, electric proportional reversing valve have rolling oil cylinder, rolling combination valve by the first pipeline of rolling and the second piping connection of rolling Block is connected between the second pipeline of the first pipeline of rolling and rolling；
Rolling combination valve block includes the first balanced valve of rolling, the second balanced valve of rolling, the first shuttle valve of rolling, the second shuttle of rolling Valve, the first check valve of rolling, the second overflow valve of rolling second one-way valve, the first overflow valve of rolling and rolling；Rolling first balances Valve is connected on the first pipeline of rolling, and the second balanced valve of rolling is connected on the second pipeline of rolling；The one of the first shuttle valve of rolling is defeated Enter the input terminal that end is connected to the first balanced valve of rolling, another input terminal of the first shuttle valve of rolling is connected to the second shuttle valve of rolling Another input terminal of one input terminal, the second shuttle valve of rolling is connected to the input terminal of the second balanced valve of rolling；The first shuttle valve of rolling Output end is connected on the second balanced valve of rolling, and the output end of the second shuttle valve of rolling is connected on the first balanced valve of rolling；Rolling The output end of first check valve is connected to the output end of the first balanced valve of rolling, and the output end of rolling second one-way valve is connected to cross The output end of the second balanced valve is shaken, the first check valve of rolling is connected to fuel tank, rolling first with the input terminal of rolling second one-way valve The input terminal of overflow valve is connected between rolling the first balanced valve output end and rolling oil cylinder, the first overflow valve of rolling it is defeated Outlet connects fuel tank, the input terminal of the second overflow valve of rolling be connected to positioned at rolling the second balanced valve output end and rolling oil cylinder it Between, the output end of the second overflow valve of rolling connects fuel tank；Rolling is connected between the second shuttle valve of the first shuttle valve of rolling and rolling The end P of two-position four-way solenoid valve, rolling two-position four-way solenoid valve is connect with total output end, the end T of rolling two-position four-way solenoid valve It is connect with fuel tank end, the end B of rolling two-position four-way solenoid valve is connected between the second shuttle valve of the first shuttle valve of rolling and rolling；
Above-mentioned rolling replenishment system, when the first hydraulic pump and the second hydraulic pump works, hydraulic oil enters from total output end To rolling electricity proportional reversing valve；Rolling electricity proportional reversing valve is controlled, hydraulic oil is combined through rolling electricity proportional reversing valve by rolling Valve block enters in rolling oil cylinder, pushes rolling cylinder movement.
In normal work, enter such as hydraulic oil from the first pipeline of rolling, hydraulic oil enters by the first balanced valve of rolling Into rolling oil cylinder, the in-oil cylinder hydraulic oil of rolling commutates through the second balanced valve of rolling from rolling electricity ratio from the second pipeline of rolling Valve returns to fuel tank, meanwhile, the section hydraulic oil of the input terminal of the first balanced valve of rolling enters rolling from the first shuttle valve of rolling Two balanced valves control the flow of the second balanced valve of rolling, play balance the first pipeline of rolling and rolling the second hydraulic pressure of pipe line oil pressure The effect of power and flow, while the second balanced valve of rolling can improve back pressure, avoid the quick emptying of rolling oil cylinder and cause rolling fast It spends fast.When the first pipeline of rolling hydraulic fluid pressure be greater than the first overflow valve of rolling pressure, then there is overflow phenomena, guarantee The in-oil cylinder oil pressure of rolling is entered to stablize.
If hydraulic oil enters from the second pipeline of rolling, hydraulic oil enters in rolling oil cylinder by the second balanced valve of rolling, The in-oil cylinder hydraulic oil of rolling returns to fuel tank from rolling electricity proportional reversing valve through the first balanced valve of rolling from the first pipeline of rolling, together When, the section hydraulic oil of the input terminal of the second balanced valve of rolling enters the first balanced valve of rolling from the second shuttle valve of rolling, control The flow of the first balanced valve of rolling plays the work of balance the first pipeline of rolling and rolling the second hydraulic pressure of pipe line oil pressure and flow With, while the first balanced valve of rolling can improve back pressure, avoid the quick emptying of rolling oil cylinder and cause rolling velocity too fast.Work as rolling The hydraulic fluid pressure of second pipeline is greater than the pressure of the second overflow valve of rolling, then overflow phenomena occurs, and guarantee enters rolling oil Oil pressure in cylinder is stablized.
Such as rolling is needed to compensate, allow rolling two-position four-way solenoid valve replace, hydraulic oil through rolling two-position four-way solenoid valve into Enter between the second shuttle valve of the first shuttle valve of rolling and rolling, then by the first balanced valve of rolling and rolling under the action of hydraulic oil The short circuit of second balanced valve, hydraulic oil can be directly over the second balanced valve of the first balanced valve of rolling or rolling, the first balanced valve of rolling Any pressure will not be provided with the second balanced valve of rolling, in this way, being able to achieve fast, accurately rolling compensation, rolling is allowed to compensate Speed and rolling speeds match, the work smoothness of Ti Gao Walk bridge.
Pitch compensation system includes pitching electricity proportional reversing valve and pitching combination valve block, pitching electricity proportional reversing valve with it is total defeated Outlet connection, electric proportional reversing valve are connected with amplitude oil cylinder, pitching combination valve by the first pitch conduit and the second pitch conduit Block is connected between the second pipeline of the first pipeline of pitching and pitching；
Pitching combination valve block includes that pitching balanced valve, the first shuttle valve of pitching 422a, the second shuttle valve of pitching, pitching first are unidirectional Valve, the second overflow valve of pitching second one-way valve, the first overflow valve of pitching and pitching；Pitching balanced valve is connected to the second pipeline of pitching On；One input terminal of the first shuttle valve of pitching is connected on the first pipeline of pitching, and the output end of the first shuttle valve of pitching is connected to pitching Another input terminal of one input terminal of the second shuttle valve, the second shuttle valve of pitching is connected to the input terminal of pitching balanced valve；Pitching second The output end of shuttle valve is connected on pitching balanced valve；The output end of the first check valve of pitching is connected on the first pipeline of pitching, is bowed The output end for facing upward second one-way valve is connected to the output end of pitching balanced valve, the first check valve of pitching and pitching second one-way valve Input terminal is connected to fuel tank, and the input terminal of the first overflow valve of pitching is connected on the first pipeline of pitching, the first overflow valve of pitching it is defeated Outlet connects fuel tank, and the input terminal of the second overflow valve of pitching is connected between pitching balanced valve output end and amplitude oil cylinder, The output end of the second overflow valve of pitching connects fuel tank；Pitching two-position four-way electricity is connected in another input terminal of the first shuttle valve of pitching The end P of magnet valve, pitching two-position four-way solenoid valve is connect with total output end, and the end T and fuel tank end of pitching two-position four-way solenoid valve connect It connects, the end B of pitching two-position four-way solenoid valve is connected to another input terminal of the first shuttle valve of pitching；
It is connected with the main servo-actuated solenoid directional control valve of pitching in total output end, wherein the end P of the main servo-actuated solenoid directional control valve of pitching connects Total input terminal is connect, the end T of the main servo-actuated solenoid directional control valve of pitching connects fuel tank, and the end B of the main servo-actuated solenoid directional control valve of pitching is connected to On the second pipeline of pitching；
Hydraulic control one-way valve, the control terminal of hydraulic control one-way valve are connected separately on the second pipeline of the first pipeline of pitching and pitching It is connect with the end B of the main servo-actuated solenoid directional control valve of pitching；
Above-mentioned pitching replenishment system, when the first hydraulic pump and the second hydraulic pump works, hydraulic oil enters from total output end To pitching electricity proportional reversing valve；Pitching electricity proportional reversing valve is controlled, hydraulic oil is combined through pitching electricity proportional reversing valve by pitching Valve block enters in amplitude oil cylinder, pushes amplitude oil cylinder movement.
In normal work, the main servo-actuated solenoid directional control valve of pitching does not give signal, if hydraulic oil enters from the first pipeline of pitching, Hydraulic oil enters in amplitude oil cylinder by pitching balanced valve, and the hydraulic oil in amplitude oil cylinder is electric from the second pipeline of pitching from pitching Proportional reversing valve returns to fuel tank.When the first pipeline of pitching hydraulic fluid pressure be greater than the first overflow valve of pitching pressure, then occur Overflow phenomena, guarantee enter the in-oil cylinder oil pressure of pitching and stablize.
If hydraulic oil enters from the second pipeline of pitching, hydraulic oil enters in amplitude oil cylinder by the second pipeline of pitching, horizontal Hydraulic oil in amplitude oil cylinder returns to fuel tank from luffing electricity proportional reversing valve through luffing balanced valve from the first pipeline of luffing, meanwhile, Section hydraulic oil on the second pipeline of pitching enters pitching balanced valve from the first shuttle valve of pitching and the second shuttle valve of pitching, and control is bowed The flow of back lever valve plays the role of balancing the first pipeline of pitching and pitching the second hydraulic pressure of pipe line oil pressure and flow, simultaneously Pitching balanced valve can improve back pressure, avoid the quick emptying of amplitude oil cylinder and cause derricking speed too fast.When the second pipeline of pitching Hydraulic fluid pressure is greater than the pressure of the second overflow valve of pitching, then overflow phenomena occurs, guarantees the oil pressure entered in amplitude oil cylinder Stablize.
Active pitch compensation is such as needed, allows pitching two-position four-way solenoid valve to replace, hydraulic oil is through pitching two-position four-way electromagnetism Valve enters the first shuttle valve of pitching, then enters the second shuttle valve of pitching from the first shuttle valve of pitching, and hydraulic oil is from the second shuttle of pitching Valve enters pitching balanced valve, and by pitching balanced valve short circuit under the action of hydraulic oil, hydraulic oil can be directly over pitching balance Valve, pitching balanced valve will not provide any pressure, in this way, be able to achieve fast, accurately pitch compensation, allow horizontal pitch compensation The speeds match of speed and pitching, the work smoothness of Ti Gao Walk bridge.
After docking facilities are to connecting, servo-actuated pitch compensation is carried out, principle is: the main servo-actuated solenoid directional control valve of pitching It is powered, the main servo-actuated solenoid directional control valve of pitching is allowed to replace, allow it to replace to the energization of pitching two-position four-way solenoid valve, hydraulic oil is through pitching Two-position four-way solenoid valve enters the first shuttle valve of pitching, then enters the second shuttle valve of pitching, hydraulic oil from the first shuttle valve of pitching Pitching balanced valve is entered from the second shuttle valve of pitching, by pitching balanced valve short circuit under the action of hydraulic oil, hydraulic oil can be direct By pitching balanced valve, pitching balanced valve will not provide any pressure, meanwhile, hydraulic oil is through the main servo-actuated solenoid directional control valve of pitching The control terminal of hydraulic control one-way valve is entered, the hydraulic oil in amplitude oil cylinder returns to fuel tank from hydraulic control one-way valve, realize servo-actuated compensation, Since pitching balanced valve is short-circuited, the work for being able to achieve quick, precision compensation , Rang Walk bridge is more steady.
The work that the pitch compensation system is able to achieve active, Active Compensation and servo-actuated compensation , Rang Walk bridge is more flat Surely.
Telescopic system includes flexible electric proportional reversing valve and flexible combination valve, and flexible electricity proportional reversing valve and total output end connect It connects, flexible electricity proportional reversing valve has telescopic oil cylinder by flexible first pipeline and flexible second piping connection, and the combination valve that stretches connects It connects on flexible first pipeline and flexible second pipeline；
Flexible combination valve group includes flexible balanced valve, two logical pilot operated directional control valves of logical pilot operated directional control valve one and two one Two, flexible balanced valve is connected between flexible first pipeline and flexible second pipeline, and the end A of two logical pilot operated directional control valves one connects Meet PpEnd, the end B of two logical pilot operated directional control valves one connect the end A of two logical pilot operated directional control valves two, and two logical hydraulic controls are changed It is connected on flexible second pipeline to the end B of valve two, the end B of two logical pilot operated directional control valves one is connected to flexible first pipeline On；One end control terminal of two logical pilot operated directional control valves two of logical pilot operated directional control valve one and two one is connected to oil return line after converging On L, the other end control terminal of two logical pilot operated directional control valves two of logical pilot operated directional control valve one and two one is connected with flexible after converging On main servo-actuated solenoid directional control valve, the end P for the main servo-actuated solenoid directional control valve that stretches connects PpEnd, the T for the main servo-actuated solenoid directional control valve that stretches End connection fuel tank, the end B for the main servo-actuated solenoid directional control valve that stretches and two logical liquid controlled reversings of logical pilot operated directional control valve one and two one The other end control terminal point of valve two connects；
Above-mentioned telescopic system, when the first hydraulic pump and the second hydraulic pump works, hydraulic oil is entered from total output end to be stretched Contract electric proportional reversing valve；The flexible electric proportional reversing valve of control, hydraulic oil pass through flexible combination valve group through flexible electric proportional reversing valve It enters in telescopic oil cylinder, pushes telescopic oil cylinder movement.
In normal work, to flexible main servo-actuated electromagnetic switch valve control signal, if hydraulic oil is from flexible first pipeline It enters in telescopic oil cylinder, the hydraulic oil in telescopic oil cylinder returns to fuel tank from flexible second pipeline from flexible electric proportional reversing valve. Due to being provided with flexible balanced valve, it is adjustable the pressure and flow of flexible first pipeline and flexible second pipeline.
After docking facilities are to connecting, need to carry out follow-up telescoping compensation, principle is: flexible electricity proportional reversing valve is multiple Position gives flexible master servo-actuated electromagnetic switch valve control signal, allows flexible main servo-actuated solenoid directional control valve to replace, PpThe hydraulic oil at end is from stretching The main servo-actuated solenoid directional control valve of contracting controls two logical pilot operated directional control valves two of logical pilot operated directional control valve one and two one, two logical hydraulic controls The transposition of the logical pilot operated directional control valve two of reversal valve one and two one, PpThe hydraulic oil at end gives telescopic oil cylinder one constant thrust, allows flexible oily Cylinder at the uniform velocity compensates, and in this process, if the pressure of telescopic oil cylinder is small, provides pressure by permanent thrust accumulator system Power, if the pressure of telescopic oil cylinder is excessive, the pressure reservoir of telescopic oil cylinder is into permanent thrust accumulator system, so that flexible dynamic Make steady.
Rotary system includes revolution electric proportional valve, and revolution electric proportional valve is connected by the first pipeline of revolution and the second pipeline of revolution It is connected to rotary motor；Revolution balanced valve is connected with turning round between the second pipeline of the first pipeline and revolution；On revolution balanced valve By in rotary motor braking mechanism piping connection to rotary motor braking mechanism；
Revolution shuttle valve is equipped on rotary motor braking mechanism pipeline, the wherein input terminal connection revolution for turning round shuttle valve is flat Weigh valve, turns round the output end connection revolution motor brake mechanism of shuttle valve；
The main servo-actuated solenoid directional control valve of revolution, the end P of main servo-actuated solenoid directional control valve are connected in revolution another input terminal of shuttle valve Total output end is connected, the end T of main servo-actuated solenoid directional control valve is connected on oil return line L, the end the B connection of main servo-actuated solenoid directional control valve Onto revolution shuttle valve；
First is connected between the second pipeline of the first pipeline of revolution between revolution balanced valve and rotary motor and revolution Servo-actuated shuttle valve, the output end of the first servo-actuated shuttle valve are connected with the first servo-actuated overflow valve, the output end connection of the first servo-actuated overflow valve To fuel tank, be parallel with the second servo-actuated shuttle valve on the first servo-actuated shuttle valve, the output end of the second servo-actuated shuttle valve connects fuel tank, first with X mouth of dynamic overflow valve is connected with servo-actuated two logical pilot operated directional control valves, be servo-actuated two logical pilot operated directional control valves be connected with second with The output end of dynamic overflow valve, the second servo-actuated overflow valve connects oil return line L, is servo-actuated a wherein control of two logical pilot operated directional control valves End processed connects oil return line L, and another control terminal of servo-actuated two logical pilot operated directional control valves is connected to the B of main servo-actuated solenoid directional control valve End.
Above-mentioned rotary system, when the first hydraulic pump and the second hydraulic pump works, hydraulic oil enters back from total output end Turn electric proportional reversing valve；Electric proportional reversing valve is turned round in control, and hydraulic oil is turned round electric proportional reversing valve and entered in angling cylinder, Promoting turning oil cylinder rotation.The positive and negative rotation of angling cylinder turns round the position of electric proportional reversing valve by control to realize.Revolution oil Cylinder work while, hydraulic oil from revolution shuttle valve enter in rotary motor braking mechanism, to rotary motor braking mechanism into Row brake releases.
It if necessary to turn round servo-actuated compensation, gives revolution main servo-actuated electromagnetic switch valve control signal, turns round main servo-actuated electromagnetism and change It replaces to valve, hydraulic oil controls from the servo-actuated solenoid directional control valve of revolution master and is servo-actuated two logical pilot operated directional control valves, is servo-actuated two one and leads to Pilot operated directional control valve transposition, the X mouth of the first servo-actuated overflow valve is connected to the second servo-actuated overflow valve, due to the pressure of the first servo-actuated overflow valve Power is greater than the pressure of the second servo-actuated overflow valve, therefore, when the hydraulic fluid pressure in rotary motor is greater than the second servo-actuated overflow valve When pressure, the first servo-actuated overflow valve is connected, the hydraulic oil in rotary motor can both ends by the first servo-actuated shuttle valve and second with Dynamic shuttle valve flows freely, and plays the role of the servo-actuated compensation of revolution.
Further, docking facilities include the pedestal being hinged on Telescopic path free end, the connection that is fixed on pedestal Seat, the butt joint base being fixed on attachment base and the oil cylinder being hinged between Telescopic path and pedestal；Docking is equipped on butt joint base Mouthful.The docking facilities structure is simple, using the structure to interface so that docking facilities be pair that can be detached from any time by docking object Mode is connect, in this way, not only facilitating docking, but also is able to achieve and is rapidly separated, it can better Bao Hu Walk bridge.
Further, rubber pad is equipped with to the inner wall of interface.Using rubber pad, rigid contact is avoided, plays protection pair Interface and effect by docking object.
Further, docking facilities include the pedestal being hinged on Telescopic path free end, the docking that is fixed on pedestal Head and the oil cylinder being hinged between Telescopic path and pedestal；Butt joint is round end to taking over, and buffering rubber is equipped in butt joint Glue.Using yielding rubber, rigid contact is avoided, plays the role of protection to interface and by docking object.
Further, main accumulator combination valve is connected on total output end；Main accumulator combination valve includes accumulator two Position two-way pilot operated directional control valve, accumulator two-position two-way electromagnetic directional valve, accumulator overflow valve；Total output end is connected with accumulator, Total output end is connect with the input terminal of accumulator overflow valve, and the output end of accumulator overflow valve connects fuel tank；Total output end connection To the end accumulator two-position two-way hydraulic control reversal valve P, the end the A connection rolling compensation system of accumulator two-position two-way hydraulic control reversal valve, Pitch compensation system, telescopic system and rotary system；A wherein control terminal for accumulator two-position two-way hydraulic control reversal valve, which connects, to be stored The end A and the end P of energy device two-position two-way hydraulic control reversal valve, another control terminal of accumulator two-position two-way hydraulic control reversal valve connect accumulator Another control terminal at the end A and the end P of two-position two-way hydraulic control reversal valve, accumulator two-position two-way hydraulic control reversal valve connects accumulator two Two electric change valves of position, accumulator two-position two-way electromagnetic directional valve connect oil return line L；Total output end is connected by oil charge valve To permanent thrust accumulator system.
When the first hydraulic pump and the second hydraulic pump works, hydraulic oil can be stand-by directly to main accumulator accumulation of energy, if main storage The pressure of energy device is excessive, then accumulator overflow valve overflow.When there is hydraulic oil to enter accumulator two-position two-way hydraulic control reversal valve P End, the transposition of accumulator two-position two-way hydraulic control reversal valve, the end P of accumulator two-position two-way hydraulic control reversal valve are connected to the end A, realization pair Rolling compensation system, pitch compensation system, telescopic system and rotary system fuel feeding.If oil charge valve replaces, can be to permanent thrust Accumulator system is oil-filled.
Further, permanent thrust accumulator system includes oil-filled pressure reducing valve, oil-filled check valve, oil-filled hand-operated valve, hand of draining the oil Dynamic valve, oil-filled overflow valve and permanent thrust accumulator；Oil-filled pressure reducing valve, oil-filled check valve, oil-filled hand-operated valve and permanent thrust accumulator It is sequentially connected, oil-filled pressure reducing valve is connected to total output end, and the one end for hand-operated valve of draining the oil connects permanent thrust accumulator, hand-operated valve of draining the oil The other end connect fuel tank, the input terminal of oil-filled overflow valve connects permanent thrust accumulator, and the output end of oil-filled overflow valve connects oil Case；The output end of permanent thrust accumulator is PPEnd.
Above-mentioned oil-filled process are as follows: open oil-filled hand-operated valve, hydraulic oil through oil charge valve, oil-filled pressure reducing valve, oil-filled check valve, Oil-filled hand-operated valve enters permanent thrust accumulator, and such as permanent thrust accumulator then passes through oil-filled overflow valve overflow.If discharging perseverance The hydraulic oil of thrust accumulator opens hand-operated valve of draining the oil.
Further, it is equipped with flexible pressure reducing valve between total output end and flexible electric proportional reversing valve, the X for the pressure reducing valve that stretches Mouth is connected with the first shuttle valve, and two input terminals of the first shuttle valve with flexible first pipeline and flexible second piping connection, are being stretched respectively It contracts and is respectively equipped with the first overflow valve on the first pipeline and flexible second pipeline.By the effect of the first shuttle valve and flexible pressure reducing valve come The output pressure for controlling flexible pressure reducing valve allows the pressure of output to stablize.
Further, it is equipped with revolution pressure valve between total output end and the electric proportional reversing valve of revolution, turns round the X mouth of pressure reducing valve Be connected with the second shuttle valve, two input terminals of the second shuttle valve respectively with the first pipeline of revolution and turn round the second piping connection.Pass through Two shuttle valves and acting on for revolution pressure reducing valve allow the pressure of output to be stablized to control the output pressure of revolution pressure reducing valve.
Detailed description of the invention
Fig. 1 is the schematic diagram of the small-sized fore-and-aft gangway based on hydraulic system.Fig. 2 is the vertical view of the small-sized fore-and-aft gangway based on hydraulic system Figure.Fig. 3 is the schematic diagram of rolling platform and rolling oil cylinder.Fig. 4 is the schematic diagram of the first structure of docking facilities.Fig. 5 is docking The main view of second of structure of device.Fig. 6 is the top view of second of structure of docking facilities.Fig. 7 is the fuel tank portion of hydraulic system Divide schematic diagram.Fig. 8 is hydraulic system execution part system.The enlarged drawing of E in Fig. 9 Fig. 7.Figure 10 is the enlarged drawing of F in Fig. 7.Figure 11 be the enlarged drawing of G in Fig. 8.Figure 12 is the enlarged drawing of H in Fig. 8.Figure 13 is the enlarged drawing of I in Fig. 8.Figure 14 is rotary system Partial schematic diagram.
Specific embodiment
The present invention will be described in further detail with reference to the accompanying drawings and detailed description.
As depicted in figs. 1 and 2, the small-sized fore-and-aft gangway based on hydraulic system includes mechanical part and hydraulic system.
As depicted in figs. 1 and 2, mechanical part includes pedestal 1, rolling platform 2, rolling oil cylinder 3, pivoting support 4, turns round and put down Platform 5, rotary motion mechanism 6, fixed channel 7, Telescopic path 8, amplitude oil cylinder 9, telescopic oil cylinder 10 and docking facilities 11.
Pedestal 1 is mounted on deck 100.As shown in figure 3, rolling platform 2 is hinged on pedestal 1, in pedestal 1 and rolling Rolling oil cylinder 3 is hinged between platform 2；In the present invention, the lower end of rolling platform 2 has cuts with scissors relative to centrosymmetric two Lug 21, hinged ear 21 is hinged on the hinged seat 1101 of pedestal by articulated shaft 22, relative to articulated shaft axisymmetrical There are two rolling oil cylinders 3 for position setting.
Pivoting support 4 is mounted on rolling platform 3；Revolving platform 5 is mounted on pivoting support 4.Rotary motion mechanism 6 Including the rotary motor 61 being mounted on revolving platform 5, the speed changer 62 being mounted on 61 output shaft of rotary motor and it is mounted on Gear 63 on transmission output shaft, gear 63 are engaged with the inner ring of pivoting support；Fixed channel 7 is hinged on revolving platform 5 On；Telescopic path 8 is slidably mounted on fixed channel 7 by guide rail；Amplitude oil cylinder 9 is hinged on revolving platform 5 and fixes logical Between road 7；Telescopic oil cylinder 10 is hinged between fixed channel 7 and Telescopic path 8.
As shown in figure 4, docking facilities 11 include the pedestal 111 being hinged on 8 free end of Telescopic path, are fixed on pedestal Attachment base 112, the butt joint base 113 being fixed on attachment base 112 on 111 and the oil being hinged between Telescopic path and pedestal Cylinder 114；It is equipped on butt joint base 113 to interface 1131.Rubber pad 115 is equipped with to the inner wall of interface.The docking facilities structure Simply, using the structure to interface so that docking facilities be the docking mode that can be detached from any time by docking object, in this way, not only Facilitate docking, and is able to achieve and is rapidly separated, it can better Bao Hu Walk bridge.Using rubber pad, rigid contact is avoided, plays protection To interface and by the effect of docking object.
As another embodiment, as shown in Figure 5 and Figure 6, docking facilities 11 include being hinged on Telescopic path free end Pedestal 111, the butt joint 116 being fixed on pedestal and the oil cylinder 114 being hinged between Telescopic path and pedestal；Butt joint is Round end is equipped with yielding rubber 117 to taking in butt joint.Using yielding rubber, rigid contact is avoided, plays protection docking Mouthful and by the effect of docking object.
For mechanical part, if rotary motor works, rotary motor rotates by transmission belt moving gear, gear and Pivoting support effect, so that revolving platform, fixed channel, Telescopic path, docking facilities, amplitude oil cylinder and telescopic oil cylinder integrally revolve Turn, realizes the revolution movement of docking facilities.If amplitude oil cylinder works, then fixed channel, Telescopic path and docking facilities pendulum are driven It is dynamic.If telescopic oil cylinder works, Telescopic path is flexible relative to fixed channel.In the present invention, due to be provided with rolling platform and Rolling oil cylinder, therefore, docking facilities can be opposing stationary relative to the part being overlapped, and realize smoothly remarkable and transport goods.
As shown in Figure 1, being equipped with climbing ladder 12 on pedestal 1, climbing ladder 12 can be entered in revolving platform.In the implementation Hydraulic pump, accumulator etc. are mounted on the pedestal 1 outside climbing ladder in example, as another embodiment, hydraulic pump, accumulator Etc. being mounted in climbing ladder.
As shown in Figure 7 and Figure 8, the hydraulic system includes main oil supply system 1a, permanent thrust accumulator system 2a, rolling Compensation system 3a, pitch compensation system 4a, telescopic system 5a and rotary system 6a.
Main oil supply system 1a includes fuel tank 11a, the first hydraulic pump 12a being connected on fuel tank 11a and the second hydraulic pump 13a；First hydraulic pump 12a is driven by motor M1, and the second hydraulic pump 13a is driven by motor M2；First hydraulic pump 12a and The output end of two hydraulic pump 13a collects to form total output end O.
After motor M1 and motor M2 start, the first hydraulic pump 12a and the second hydraulic pump 13a starting, by hydraulic oil from oil Case 11a is pumped out to total output end O.Using multiple hydraulic pumps, the oil pressure and flow in hydraulic system can be improved, while ought wherein one Hydraulic pump damage, hydraulic pump in addition can play the role of emergency.
As shown in figures 7 and 9, main accumulator combination valve 7a is connected on total output end O；Main accumulator combination valve 7a Including accumulator two-position two-way hydraulic control reversal valve 71a, accumulator two-position two-way electromagnetic directional valve 72a, accumulator overflow valve 73a； Total output end O is connected with accumulator 74a, and total output end O is connect with the input terminal of accumulator overflow valve 73a, accumulator overflow valve The output end of 73a connects fuel tank 11a；Total output end O is connected to the end P of accumulator two-position two-way hydraulic control reversal valve 71a, accumulator The end A connection rolling compensation system, pitch compensation system, telescopic system and the rotary system of two-position two-way hydraulic control reversal valve 71a；It stores The end A of the wherein control terminal connection accumulator two-position two-way hydraulic control reversal valve 71a of energy device two-position two-way hydraulic control reversal valve 71a With the end P, another control terminal of accumulator two-position two-way hydraulic control reversal valve 71a connects accumulator two-position two-way hydraulic control reversal valve 71a's Another control terminal at the end A and the end P, accumulator two-position two-way hydraulic control reversal valve 71a connects accumulator two-position two-way electromagnetic directional valve 72a, accumulator two-position two-way electromagnetic directional valve 72a connection oil return line L；Total output end O is connected to perseverance by oil charge valve 20a Thrust accumulator system 2a.
When the first hydraulic pump 12a and the second hydraulic pump 13a works, hydraulic oil can be stand-by directly to main accumulator accumulation of energy, such as The pressure of the main accumulator of fruit is excessive, then accumulator overflow valve 73a overflow.When there is hydraulic oil to enter accumulator two-position two-way hydraulic control The end reversal valve 71aP, accumulator two-position two-way hydraulic control reversal valve 71a transposition, the P of accumulator two-position two-way hydraulic control reversal valve 71a End is connected to the end A, is realized to rolling compensation system, pitch compensation system, telescopic system and rotary system fuel feeding.If oil charge valve Transposition, then can be oil-filled to permanent thrust accumulator system.
Permanent thrust accumulator system 2a is connected to total output end O, and permanent thrust accumulator system 2a has output end PP；Perseverance pushes away Power accumulator system 2a is used to provide permanent thrust to telescopic oil cylinder, allows telescopic oil cylinder to move in servomechanism process more steady, To make the movement of Telescopic path steady.
As illustrated in fig. 7 and fig. 10, permanent thrust accumulator system 2a includes oil-filled pressure reducing valve 21a, oil-filled check valve 22a, fills Oily hand-operated valve 23a, the hand-operated valve 24a that drains the oil, oil-filled overflow valve 25a and permanent thrust accumulator 26a；Oil-filled pressure reducing valve 21a, oil-filled list It being sequentially connected to valve 22a, oil-filled hand-operated valve 23a and perseverance thrust accumulator 26a, oil-filled pressure reducing valve 21a is connected to total output end O, Drain the oil one end of hand-operated valve 24a connects the other end connection fuel tank 11a of permanent thrust accumulator 26a, the hand-operated valve 24a that drains the oil, oil-filled The output end that the input terminal of overflow valve 25a connects permanent thrust accumulator 26a, oil-filled overflow valve 25a connects fuel tank 11a；Permanent thrust The output end of accumulator 26a is PPEnd.
Above-mentioned oil-filled process are as follows: open oil-filled hand-operated valve 23a, hydraulic oil is through oil charge valve, oil-filled pressure reducing valve 21a, oil-filled Check valve 22a, oil-filled hand-operated valve 23a enter permanent thrust accumulator 26a, and such as permanent thrust accumulator 26a then passes through oil-filled overflow Valve 25a overflow.If discharging the hydraulic oil of permanent thrust accumulator 26a, the hand-operated valve 24a that drains the oil is opened.
As shown in figure 8, rolling compensation system 3a includes rolling electricity proportional reversing valve 31a and rolling combination valve block 32a, rolling Electric proportional reversing valve 31a is connect with total output end O, and rolling electricity proportional reversing valve 31a passes through rolling the first pipeline 34a and rolling the Two pipeline 35a are connected with rolling oil cylinder 3, and rolling combination valve block 32a is connected to the second pipeline of rolling the first pipeline 34a and rolling Between 35a.
As shown in figure 11, rolling combination valve block 32a include the first balanced valve of rolling 321a, the second balanced valve of rolling 322a, The first shuttle valve of rolling 323a, the second shuttle valve of rolling 324a, the first check valve of rolling 325a, rolling second one-way valve 326a, rolling First overflow valve 327a and the second overflow valve of rolling 328a；The first balanced valve of rolling 321a is connected on the first pipeline of rolling 34a, The second balanced valve of rolling 322a is connected on the second pipeline of rolling 35a；An input terminal of the first shuttle valve of rolling 323a is connected to cross The input terminal of the first balanced valve 321a is shaken, another input terminal of the first shuttle valve of rolling 323a is connected to the second shuttle valve of rolling 324a An input terminal, another input terminal of the second shuttle valve of rolling 324a is connected to the input terminal of the second balanced valve of rolling 322a；Rolling The output end of first shuttle valve 323a is connected on the second balanced valve of rolling 322a, and the output end of the second shuttle valve of rolling 324a is connected to On the first balanced valve of rolling 321a；The output end of the first check valve of rolling 325a is connected to the output of the first balanced valve of rolling 321a End, the output end of rolling second one-way valve 326a are connected to the output end of the second balanced valve of rolling 322a, the first check valve of rolling 325a is connected to fuel tank 11a with the input terminal of rolling second one-way valve 326a, and the input terminal of the first overflow valve of rolling 327a is connected to Between rolling the first balanced valve 321a output end and rolling oil cylinder 3, the output end of the first overflow valve of rolling 327a connects oil The input terminal of case 11a, the second overflow valve of rolling 328a are connected to positioned at rolling the second balanced valve 322a output end and rolling oil cylinder 3 Between, the output end of the second overflow valve of rolling 328a connects fuel tank 11a；In rolling the first shuttle valve 323a and the second shuttle valve of rolling Rolling two-position four-way solenoid valve is connected between 324a, the end P of rolling two-position four-way solenoid valve is connect with total output end O, rolling The end T of two-position four-way solenoid valve is connect with the end fuel tank 11a, and the end B of rolling two-position four-way solenoid valve is connected to the first shuttle valve of rolling Between 323a and the second shuttle valve of rolling 324a.
Above-mentioned rolling replenishment system, when the first hydraulic pump 12a and the second hydraulic pump 13a works, hydraulic oil is exported from total End O enters rolling electricity proportional reversing valve 31a；Rolling electricity proportional reversing valve 31a is controlled, hydraulic oil commutates through rolling electricity ratio Valve 31a is entered in rolling oil cylinder 3 by rolling combination valve block 32a, and rolling oil cylinder 3 is pushed to move.
In normal work, enter such as hydraulic oil from rolling the first pipeline 34a, hydraulic oil passes through the first balanced valve of rolling 321a is entered in rolling oil cylinder 3, and the hydraulic oil in rolling oil cylinder 3 is from rolling the second pipeline 35a through the second balanced valve of rolling 322a returns to fuel tank 11a from rolling electricity proportional reversing valve 31a, meanwhile, the part liquid of the input terminal of the first balanced valve of rolling 321a Pressure oil enters rolling the second balanced valve 322a from the first shuttle valve of rolling 323a, controls the flow of the second balanced valve of rolling 322a, Play the role of balancing rolling the first pipeline 34a and rolling the second pipeline 35a hydraulic fluid pressure and flow, while rolling second is flat Weighing apparatus valve 322a can improve back pressure, avoid the quick emptying of rolling oil cylinder 3 and cause rolling velocity too fast.As the first pipeline of rolling 34a Hydraulic fluid pressure be greater than the pressure of the first overflow valve of rolling 327a, then there is overflow phenomena, guarantee enters in rolling oil cylinder 3 Oil pressure stablize.
If hydraulic oil enters from rolling the second pipeline 35a, hydraulic oil enters rolling by the second balanced valve of rolling 322a In oil cylinder 3, hydraulic oil in rolling oil cylinder 3 is from rolling the first pipeline 34a through rolling the first balanced valve 321a from rolling electricity ratio Reversal valve 31a returns to fuel tank 11a, meanwhile, the section hydraulic oil of the input terminal of the second balanced valve of rolling 322a is from the second shuttle of rolling Valve 324a enters rolling the first balanced valve 321a, controls the flow of the first balanced valve of rolling 321a, plays balance rolling first The effect of pipeline 34a and rolling the second pipeline 35a hydraulic fluid pressure and flow, while the first balanced valve of rolling 321a can improve back Pressure, avoids the quick emptying of rolling oil cylinder 3 and causes rolling velocity too fast.When the hydraulic fluid pressure of the second pipeline of rolling 35a is greater than Then there is overflow phenomena in the pressure of the second overflow valve of rolling 328a, guarantees that the oil pressure entered in rolling oil cylinder 3 is stablized.
Such as rolling is needed to compensate, allow rolling two-position four-way solenoid valve replace, hydraulic oil through rolling two-position four-way solenoid valve into Enter between rolling the first shuttle valve 323a and the second shuttle valve of rolling 324a, then balances rolling first under the action of hydraulic oil Valve 321a and the 322a short circuit of the second balanced valve of rolling, hydraulic oil can be directly over rolling the first balanced valve 321a or rolling second Balanced valve 322a, rolling the first balanced valve 321a and the second balanced valve of rolling 322a will not provide any pressure, in this way, can be real Now fast, accurately rolling compensates, the speeds match of the speed and rolling that allow rolling to compensate, the work smoothness of Ti Gao Walk bridge.
As shown in figure 8, pitch compensation system 4a includes pitching electricity proportional reversing valve 41a and pitching combination valve block 42a, pitching Electric proportional reversing valve 41a is connect with total output end O, and pitching electricity proportional reversing valve 41a is bowed by the first pitch conduit 44a and second Face upward pipeline 45a and be connected with amplitude oil cylinder, pitching combination valve block 42a be connected to the first pipeline of pitching and the second pipeline of pitching it Between；
As shown in figure 12, pitching combination valve block 42a includes pitching balanced valve 421a, the first shuttle valve of pitching 422a, pitching Two shuttle valve 423a, the first check valve of pitching 424a, pitching second one-way valve 425a, pitching the first overflow valve 426a and pitching second Overflow valve 427a；Pitching balanced valve 421a is connected on the second pipeline of pitching；An input terminal of the first shuttle valve of pitching 422a connects On the first pipeline of pitching 44a, the output end of the first shuttle valve of pitching 422a is connected to an input terminal of the second shuttle valve of pitching 423a, Another input terminal of the second shuttle valve of pitching 423a is connected to the input terminal of pitching balanced valve 421a；The second shuttle valve of pitching 423a's is defeated Outlet is connected on pitching balanced valve 421a；The output end of the first check valve of pitching 424a is connected to the first pipeline of pitching 44a On, the output end of pitching second one-way valve 425a is connected to the output end of pitching balanced valve, pitching the first check valve 424a and bows The input terminal connection fuel tank 11a of second one-way valve 425a is faced upward, the input terminal of the first overflow valve of pitching 426a is connected to pitching first On pipeline 44a, the output end of the first overflow valve of pitching 426a connects fuel tank 11a, and the input terminal of the second overflow valve of pitching 427a connects It connects between pitching balanced valve output end and amplitude oil cylinder 9, the output end of the second overflow valve of pitching 427a connects fuel tank 11a；Pitching two-position four-way solenoid valve 428a, pitching two-position four-way electricity are connected in another input terminal of the first shuttle valve of pitching 422a The end P of magnet valve 428a is connect with total output end O, and the end T of pitching two-position four-way solenoid valve 428a is connect with the end fuel tank 11a, pitching The end B of two-position four-way solenoid valve 428a is connected to another input terminal of the first shuttle valve of pitching 422a.
It is connected with the main servo-actuated solenoid directional control valve 429a of pitching in total output end O, wherein the main servo-actuated solenoid directional control valve of pitching The end P of 429a connects total input terminal, and the end T of the main servo-actuated solenoid directional control valve 429a of pitching connects fuel tank 11a, the main servo-actuated electricity of pitching The end B of magnetic reversal valve 429a is connected on the second pipeline of pitching.
Hydraulic control one-way valve, the control of hydraulic control one-way valve are connected separately on the second pipeline of pitching the first pipeline 44a and pitching End processed is connect with the end B of the main servo-actuated solenoid directional control valve 429a of pitching.
Above-mentioned pitching replenishment system, when the first hydraulic pump 12a and the second hydraulic pump 13a works, hydraulic oil is exported from total End O enters pitching electricity proportional reversing valve 41a；Pitching electricity proportional reversing valve 41a is controlled, hydraulic oil commutates through pitching electricity ratio Valve 41a is entered in amplitude oil cylinder by pitching combination valve block 42a, pushes amplitude oil cylinder movement.
In normal work, the main servo-actuated solenoid directional control valve 429a of pitching does not give signal, if hydraulic oil is from the first pipeline of pitching 44a enters, and hydraulic oil enters in amplitude oil cylinder by pitching balanced valve 421a, and the hydraulic oil in amplitude oil cylinder is from pitching the Two pipelines return to fuel tank 11a from pitching electricity proportional reversing valve 41a.When the hydraulic fluid pressure of the first pipeline of pitching 44a is greater than pitching , then there is overflow phenomena in the pressure of first overflow valve 426a, and guarantee enters the in-oil cylinder oil pressure of pitching and stablizes.
If hydraulic oil enters from the second pipeline of pitching, hydraulic oil enters in amplitude oil cylinder by the second pipeline of pitching, horizontal Hydraulic oil in amplitude oil cylinder returns to fuel tank 11a from luffing electricity proportional reversing valve through luffing balanced valve from the first pipeline of luffing, together When, it is flat that section hydraulic oil on the second pipeline of pitching from pitching the first shuttle valve 422a and the second shuttle valve of pitching 423a enters pitching Weigh valve 421a, controls the flow of pitching balanced valve 421a, plays balance pitching the first pipeline 44a and the second hydraulic pressure of pipe line of pitching The effect of oil pressure and flow, while pitching balanced valve 421a can improve back pressure, avoid the quick emptying of amplitude oil cylinder and cause to become Width excessive velocities.When pressure of the hydraulic fluid pressure of the second pipeline of pitching greater than the second overflow valve of pitching 427a, then there is overflow Phenomenon guarantees that the oil pressure entered in amplitude oil cylinder is stablized.
Active pitch compensation is such as needed, allows pitching two-position four-way solenoid valve 428a to replace, hydraulic oil is through pitching two-position four-way Solenoid valve 428a enters pitching the first shuttle valve 422a, then enters the second shuttle valve of pitching from the first shuttle valve of pitching 422a 423a, hydraulic oil enter pitching balanced valve 421a from the second shuttle valve of pitching 423a, balance pitching under the action of hydraulic oil Valve 421a short circuit, hydraulic oil can be directly over pitching balanced valve 421a, and pitching balanced valve 421a will not provide any pressure, In this way, be able to achieve fast, accurately pitch compensation, the speed of horizontal pitch compensation and the speeds match of pitching are allowed, Ti Gao Walk bridge Work smoothness.
After docking facilities are to connecting, servo-actuated pitch compensation is carried out, principle is: the main servo-actuated solenoid directional control valve of pitching 429a is powered, and the main servo-actuated solenoid directional control valve 429a of pitching is allowed to replace, and allows it to change to pitching two-position four-way solenoid valve 428a energization Position, hydraulic oil enters pitching the first shuttle valve 422a through pitching two-position four-way solenoid valve 428a, then from the first shuttle valve of pitching 422a enters pitching the second shuttle valve 423a, and hydraulic oil enters pitching balanced valve 421a from the second shuttle valve of pitching 423a, in liquid By the 421a short circuit of pitching balanced valve under the action of pressure oil, hydraulic oil can be directly over pitching balanced valve 421a, pitching balanced valve 421a will not provide any pressure, meanwhile, hydraulic oil enters hydraulic control one-way valve through the main servo-actuated solenoid directional control valve 429a of pitching Control terminal, the hydraulic oil in amplitude oil cylinder returns to fuel tank 11a from hydraulic control one-way valve, realizes servo-actuated compensation, since pitching balances Valve 421a is short-circuited, and therefore, the work for being able to achieve quick, precision compensation , Rang Walk bridge is more steady.
The work that the pitch compensation system is able to achieve active, Active Compensation and servo-actuated compensation , Rang Walk bridge is more flat Surely.
As shown in figure 8, telescopic system 5a includes flexible electricity proportional reversing valve 51a and flexible combination valve 52a, electricity ratio of stretching Reversal valve 51a is connect with total output end O, and the electricity proportional reversing valve 51a that stretches is connected by flexible first pipeline and flexible second pipeline It is connected to telescopic oil cylinder, flexible combination valve 52a is connected on flexible first pipeline 54a and flexible second pipeline 55a.
As shown in figure 13, combination valve 52a group of stretching includes flexible balanced valve 521a, two logical one 522a of pilot operated directional control valve Flexible first pipeline 54a and flexible second pipeline are connected to two logical two 523a of pilot operated directional control valve, flexible balanced valve 521a Between 55a, the end A of two logical one 522a of pilot operated directional control valve connects PpEnd, the end B of two logical one 522a of pilot operated directional control valve The end A of two logical two 523a of pilot operated directional control valve is connected, the end B of two logical two 523a of pilot operated directional control valve is connected to flexible second On pipeline 55a, the end B of two logical one 522a of pilot operated directional control valve is connected on flexible first pipeline 54a；Two logical hydraulic controls are changed It is connected on oil return line L after converging to one end control terminal of one 522a and two logical two 523a of pilot operated directional control valve of valve, two The other end control terminal of logical two 523a of pilot operated directional control valve of one logical pilot operated directional control valve one 522a and two one is connected with flexible after converging On main servo-actuated solenoid directional control valve 524a, the end P for the main servo-actuated solenoid directional control valve 524a that stretches connects PpEnd, flexible main servo-actuated electromagnetism change Fuel tank 11a is connected to the end T of valve 524a, the end B for the main servo-actuated solenoid directional control valve 524a that stretches and two logical pilot operated directional control valves one The other end control terminal point connection of 522a and two logical two 523a of pilot operated directional control valve.
Above-mentioned telescopic system, when the first hydraulic pump 12a and the second hydraulic pump 13a work, hydraulic oil from total output end O into Enter to flexible electric proportional reversing valve 51a；The flexible electric proportional reversing valve 51a of control, hydraulic oil is through flexible electric proportional reversing valve 51a It is entered in telescopic oil cylinder by flexible combination valve 52a group, pushes telescopic oil cylinder movement.
In normal work, signal is not controlled to flexible main servo-actuated solenoid directional control valve 524a, if hydraulic oil is from flexible first Pipeline 54a is entered in telescopic oil cylinder, and the hydraulic oil in telescopic oil cylinder commutates from flexible second pipeline 55a from flexible electric ratio Valve 51a returns to fuel tank 11a.Due to being provided with flexible balanced valve 521a, it is adjustable flexible first pipeline 54a and flexible the The pressure and flow of two pipeline 55a.
It after docking facilities are to connecting, needs to carry out follow-up telescoping compensation, principle is: flexible electricity proportional reversing valve 51a It resets, controls signal to the flexible main solenoid directional control valve 524a that is servo-actuated, allow flexible main servo-actuated solenoid directional control valve 524a to replace, PpEnd Hydraulic oil is servo-actuated solenoid directional control valve 524a two one 522a and two logical hydraulic controls of logical pilot operated directional control valve of control from flexible master and changes To two 523a of valve, two logical pilot operated directional control valves, one 522a and two logical two 523a of pilot operated directional control valve transposition, PpThat holds is hydraulic Oil gives one constant thrust of telescopic oil cylinder, allows telescopic oil cylinder at the uniform velocity to compensate, in this process, if the pressure of telescopic oil cylinder It is small, then pressure, if the pressure of telescopic oil cylinder is excessive, the pressure reservoir of telescopic oil cylinder are provided by permanent thrust accumulator system Into permanent thrust accumulator system, so that expanding-contracting action is steady.
As shown in figure 8, rotary system 6a includes revolution electric proportional valve 61a, revolution electric proportional valve 61a passes through the first pipe of revolution Road 64a and the second pipeline 65a of revolution are connected with rotary motor 61；It is turning round between the second pipeline 65a of the first pipeline 64a and revolution It is connected with revolution balanced valve 63a；It is stopped on revolution balanced valve 63a by rotary motor braking mechanism piping connection to rotary motor On mechanism of car 66a.
As shown in figure 14, it is equipped with revolution shuttle valve 671a on rotary motor braking mechanism pipeline, turns round its of shuttle valve 671a In an input terminal connection revolution balanced valve 63a, revolution shuttle valve 671a output end connection revolution motor brake mechanism 66a；
It is connected with the main servo-actuated solenoid directional control valve 672a of revolution in revolution another input terminal of shuttle valve 671a, turns round main servo-actuated electromagnetism The end P of reversal valve connects total output end O, and the end T for turning round main servo-actuated solenoid directional control valve is connected on oil return line L, revolution it is main with The end B of dynamic solenoid directional control valve is connected on revolution shuttle valve 671a.
Connect between the second pipeline 65a of revolution the first pipeline 64a between revolution balanced valve 63a and rotary motor and revolution Be connected to the first servo-actuated shuttle valve 673a, the output end of the first servo-actuated shuttle valve 673a is connected with the first servo-actuated overflow valve 675a, first with The output end of dynamic overflow valve 675a is connected to fuel tank 11a, and the second servo-actuated shuttle valve 674a is parallel on the first servo-actuated shuttle valve 673a, The output end of second servo-actuated shuttle valve 674a connects fuel tank 11a, and the X mouth of the first servo-actuated overflow valve 675a is connected with servo-actuated two one and leads to Pilot operated directional control valve 676a, servo-actuated two logical pilot operated directional control valve 676a are connected with the second servo-actuated overflow valve 677a, and second is servo-actuated excessive The output end for flowing valve 677a connects oil return line L, and a wherein control terminal of servo-actuated two logical pilot operated directional control valve 676a connects back to Oil pipe line L, another control terminal of servo-actuated two logical pilot operated directional control valve 676a are connected to the end B of main servo-actuated solenoid directional control valve.The The setting pressure of one servo-actuated overflow valve is greater than the setting pressure of the second servo-actuated overflow valve.
Above-mentioned rotary system, when the first hydraulic pump 12a and the second hydraulic pump 13a work, hydraulic oil from total output end O into Enter to the electric proportional reversing valve of revolution；Electric proportional reversing valve is turned round in control, and hydraulic oil is turned round electric proportional reversing valve and enters revolution In oil cylinder, promoting turning oil cylinder rotation.The positive and negative rotation of angling cylinder turns round the position of electric proportional reversing valve by control to realize. While work, hydraulic oil enters in rotary motor braking mechanism 66a angling cylinder from revolution shuttle valve 671a, to revolution horse Brake releasing is carried out up to braking mechanism 66a.
If necessary to turn round servo-actuated compensation, signal is controlled to the main servo-actuated solenoid directional control valve 672a of revolution, turns round main servo-actuated electricity Magnetic reversal valve 672a transposition, hydraulic oil control from the main servo-actuated solenoid directional control valve 672a of revolution and are servo-actuated two logical pilot operated directional control valves 676a is servo-actuated two logical pilot operated directional control valve 676a transpositions, the X mouth and the second servo-actuated overflow valve of the first servo-actuated overflow valve 675a 677a connection, due to the first servo-actuated overflow valve 675a pressure be greater than the second servo-actuated overflow valve 677a pressure, when return When turning pressure of the hydraulic fluid pressure in motor greater than the second servo-actuated overflow valve 677a, the first servo-actuated overflow valve 675a is connected, and is returned Turning the hydraulic oil in motor can be flowed freely at both ends by the first servo-actuated servo-actuated shuttle valve 674a of shuttle valve 673a and second, be played back Turn the effect of servo-actuated compensation.
As shown in figure 13, it is equipped with flexible pressure reducing valve between total output end O and flexible electric proportional reversing valve 51a, it is flexible to subtract The X mouth of pressure valve is connected with the first shuttle valve, two input terminals of the first shuttle valve respectively with flexible first pipeline 54a and flexible second pipeline 55a connection is respectively equipped with the first overflow valve on flexible first pipeline 54a and flexible second pipeline 55a.By the first shuttle valve with Acting on for flexible pressure reducing valve allows the pressure of output to be stablized to control the output pressure of flexible pressure reducing valve.
As shown in figure 14, it is equipped with revolution pressure valve between total output end O and the electric proportional reversing valve of revolution, turns round pressure reducing valve X mouthfuls are connected with the second shuttle valve, and two input terminals of the second shuttle valve connect with the first pipeline 64a of revolution and the second pipeline 65a of revolution respectively It connects.The output pressure that revolution pressure reducing valve is controlled by the effect of the second shuttle valve and revolution pressure reducing valve allows the pressure of output to stablize.

Claims (8)

1. a kind of small-sized fore-and-aft gangway based on hydraulic system, including mechanical part and hydraulic system；
Mechanical part includes pedestal, pivoting support, revolving platform, rotary motion mechanism, fixed channel, Telescopic path, luffing oil Cylinder, telescopic oil cylinder and docking facilities；
Revolving platform is mounted on pivoting support；Rotary motion mechanism includes the rotary motor being mounted on revolving platform, installation Speed changer on rotary motor output shaft and the gear being mounted on transmission output shaft, gear are engaged with pivoting support；Gu Routing is hinged on revolving platform；Telescopic path is slidably mounted on fixed channel；Amplitude oil cylinder is hinged on revolving platform Between fixed channel；Telescopic oil cylinder is hinged between fixed channel and Telescopic path；Docking facilities are mounted on Telescopic path Free end；It is characterized by:
It is hinged with rolling platform on pedestal, rolling oil cylinder is hinged between pedestal and rolling platform；Pivoting support is mounted on On rolling platform；
The hydraulic system include main oil supply system, permanent thrust accumulator system, rolling compensation system, pitch compensation system, Telescopic system and rotary system；
Main oil supply system includes fuel tank, the first hydraulic pump being connected on fuel tank and the second hydraulic pump；First hydraulic pump passes through electricity Machine M1 drives, and the second hydraulic pump is driven by motor M2；The output end of first hydraulic pump and the second hydraulic pump collect to be formed it is total defeated Outlet；
Permanent thrust accumulator system is connected to total output end, and permanent thrust accumulator has output end PP；
Rolling compensation system includes rolling electricity proportional reversing valve and rolling combination valve block, rolling electricity proportional reversing valve and total output end Connection, electric proportional reversing valve have rolling oil cylinder by the first pipeline of rolling and the second piping connection of rolling, and rolling combination valve block connects It connects between the second pipeline of the first pipeline of rolling and rolling；
Rolling combination valve block include the first balanced valve of rolling, the second balanced valve of rolling, the first shuttle valve of rolling, the second shuttle valve of rolling, The first check valve of rolling, the second overflow valve of rolling second one-way valve, the first overflow valve of rolling and rolling；The first balanced valve of rolling connects It connects on the first pipeline of rolling, the second balanced valve of rolling is connected on the second pipeline of rolling；One input terminal of the first shuttle valve of rolling It is connected to the input terminal of the first balanced valve of rolling, it is one defeated to be connected to the second shuttle valve of rolling for another input terminal of the first shuttle valve of rolling Enter end, another input terminal of the second shuttle valve of rolling is connected to the input terminal of the second balanced valve of rolling；The output of the first shuttle valve of rolling End is connected on the second balanced valve of rolling, and the output end of the second shuttle valve of rolling is connected on the first balanced valve of rolling；Rolling first The output end of check valve is connected to the output end of the first balanced valve of rolling, and the output end of rolling second one-way valve is connected to rolling The output end of two balanced valves, the first check valve of rolling are connected to fuel tank, the first overflow of rolling with the input terminal of rolling second one-way valve The input terminal of valve is connected between rolling the first balanced valve output end and rolling oil cylinder, the output end of the first overflow valve of rolling Fuel tank is connected, the input terminal of the second overflow valve of rolling is connected between rolling the second balanced valve output end and rolling oil cylinder, The output end of the second overflow valve of rolling connects fuel tank；Rolling two are connected between the second shuttle valve of the first shuttle valve of rolling and rolling The end P of four way solenoid valve, rolling two-position four-way solenoid valve is connect with total output end, the end T of rolling two-position four-way solenoid valve and oil The connection of case end, the end B of rolling two-position four-way solenoid valve is connected between the second shuttle valve of the first shuttle valve of rolling and rolling；
Pitch compensation system includes pitching electricity proportional reversing valve and pitching combination valve block, pitching electricity proportional reversing valve and total output end Connection, electric proportional reversing valve are connected with amplitude oil cylinder by the first pitch conduit and the second pitch conduit, and pitching combination valve block connects It connects between the second pipeline of the first pipeline of pitching and pitching；
Pitching combination valve block includes pitching balanced valve, the first shuttle valve of pitching, the second shuttle valve of pitching, the first check valve of pitching, pitching The second overflow valve of second one-way valve, the first overflow valve of pitching and pitching；Pitching balanced valve is connected on the second pipeline of pitching；Pitching One input terminal of the first shuttle valve is connected on the first pipeline of pitching, and the output end of the first shuttle valve of pitching is connected to the second shuttle valve of pitching An input terminal, another input terminal of the second shuttle valve of pitching is connected to the input terminal of pitching balanced valve；The second shuttle valve of pitching it is defeated Outlet is connected on pitching balanced valve；The output end of the first check valve of pitching is connected on the first pipeline of pitching, and pitching second is single The output end of pitching balanced valve, the input terminal company of the first check valve of pitching and pitching second one-way valve are connected to the output end of valve Logical fuel tank, the input terminal of the first overflow valve of pitching are connected on the first pipeline of pitching, the output end connection of the first overflow valve of pitching The input terminal of fuel tank, the second overflow valve of pitching is connected between pitching balanced valve output end and amplitude oil cylinder, pitching second The output end of overflow valve connects fuel tank；It is connected with pitching two-position four-way solenoid valve in another input terminal of the first shuttle valve of pitching, is bowed The end P for facing upward two-position four-way solenoid valve is connect with total output end, and the end T of pitching two-position four-way solenoid valve is connect with fuel tank end, pitching The end B of two-position four-way solenoid valve is connected to another input terminal of the first shuttle valve of pitching；
It is connected with the main servo-actuated solenoid directional control valve of pitching in total output end, wherein the end the P connection of the main servo-actuated solenoid directional control valve of pitching is total The end T of input terminal, the main servo-actuated solenoid directional control valve of pitching connects fuel tank, and the end B of the main servo-actuated solenoid directional control valve of pitching is connected to pitching On second pipeline；
Be connected separately with hydraulic control one-way valve on the second pipeline of the first pipeline of pitching and pitching, the control terminal of hydraulic control one-way valve with bow Face upward the end the B connection of main servo-actuated solenoid directional control valve；
Telescopic system includes flexible electric proportional reversing valve and flexible combination valve, and flexible electricity proportional reversing valve is connect with total output end, Flexible electricity proportional reversing valve has telescopic oil cylinder by flexible first pipeline and flexible second piping connection, and flexible combination valve is connected to On flexible first pipeline and flexible second pipeline；
Flexible combination valve group includes flexible balanced valve, two logical pilot operated directional control valves two of logical pilot operated directional control valve one and two one, is stretched Contracting balanced valve is connected between flexible first pipeline and flexible second pipeline, and the end A of two logical pilot operated directional control valves one connects Pp End, the end B of two logical pilot operated directional control valves one connect the end A of two logical pilot operated directional control valves two, two logical pilot operated directional control valves Two end B is connected on flexible second pipeline, and the end B of two logical pilot operated directional control valves one is connected on flexible first pipeline；Two One end control terminal of the one logical pilot operated directional control valve two of logical pilot operated directional control valve one and two one of position is connected on oil return line L after converging, The other end control terminal of two logical pilot operated directional control valves two of logical pilot operated directional control valve one and two one be connected with after converging it is flexible main with On dynamic solenoid directional control valve, the end P for the main servo-actuated solenoid directional control valve that stretches connects PpThe end T at end, the main servo-actuated solenoid directional control valve that stretches connects Connected tank, the end B for the main servo-actuated solenoid directional control valve that stretches and two logical pilot operated directional control valves two of logical pilot operated directional control valve one and two one The other end control terminal point connection；
Rotary system includes revolution electric proportional valve, and revolution electric proportional valve has by the first pipeline of revolution and the second piping connection of revolution Rotary motor；Revolution balanced valve is connected with turning round between the second pipeline of the first pipeline and revolution；Pass through on revolution balanced valve In rotary motor braking mechanism piping connection to rotary motor braking mechanism；
It is equipped with revolution shuttle valve on rotary motor braking mechanism pipeline, turns round the wherein input terminal connection revolution balance of shuttle valve Valve turns round the output end connection revolution motor brake mechanism of shuttle valve；
The main servo-actuated solenoid directional control valve of revolution, the end the P connection of main servo-actuated solenoid directional control valve are connected in revolution another input terminal of shuttle valve The end T of total output end, main servo-actuated solenoid directional control valve is connected on oil return line L, and the end B of main servo-actuated solenoid directional control valve is connected to back Turn on shuttle valve；
It is servo-actuated that first is connected between the second pipeline of the first pipeline of revolution between revolution balanced valve and rotary motor and revolution Shuttle valve, the output end of the first servo-actuated shuttle valve are connected with the first servo-actuated overflow valve, and the output end of the first servo-actuated overflow valve is connected to oil Case is parallel with the second servo-actuated shuttle valve on the first servo-actuated shuttle valve, and the output end of the second servo-actuated shuttle valve connects fuel tank, and first is servo-actuated excessive The X mouth of stream valve is connected with servo-actuated two logical pilot operated directional control valves, and it is servo-actuated excessive that servo-actuated two logical pilot operated directional control valves are connected with second Valve is flowed, the output end of the second servo-actuated overflow valve connects oil return line L, is servo-actuated a wherein control terminal for two logical pilot operated directional control valves Oil return line L is connected, another control terminal of servo-actuated two logical pilot operated directional control valves is connected to the end B of main servo-actuated solenoid directional control valve.
2. the small-sized fore-and-aft gangway according to claim 1 based on hydraulic system, it is characterised in that: docking facilities include being hinged on Pedestal on Telescopic path free end, the attachment base being fixed on pedestal, the butt joint base being fixed on attachment base and being hinged on are stretched Oil cylinder between contracting channel and pedestal；It is equipped on butt joint base to interface.
3. the small-sized fore-and-aft gangway according to claim 2 based on hydraulic system, it is characterised in that: be equipped with to the inner wall of interface Rubber pad.
4. the small-sized fore-and-aft gangway according to claim 1 based on hydraulic system, it is characterised in that: docking facilities include being hinged on Pedestal, the butt joint being fixed on pedestal on Telescopic path free end and the oil cylinder being hinged between Telescopic path and pedestal； Butt joint is round end to taking over, and yielding rubber is equipped in butt joint.
5. the small-sized fore-and-aft gangway according to claim 1 based on hydraulic system, it is characterised in that: be connected on total output end Main accumulator combination valve；Main accumulator combination valve includes accumulator two-position two-way hydraulic control reversal valve, accumulator bi-bit bi-pass electromagnetism Reversal valve, accumulator overflow valve；Total output end is connected with accumulator, and total output end is connect with the input terminal of accumulator overflow valve, The output end of accumulator overflow valve connects fuel tank；Total output end is connected to the end accumulator two-position two-way hydraulic control reversal valve P, accumulator The end A connection rolling compensation system, pitch compensation system, telescopic system and the rotary system of two-position two-way hydraulic control reversal valve；Accumulation of energy The end A and the end P of the wherein control terminal connection accumulator two-position two-way hydraulic control reversal valve of device two-position two-way hydraulic control reversal valve, accumulation of energy The end A and the end P of another control terminal connection accumulator two-position two-way hydraulic control reversal valve of device two-position two-way hydraulic control reversal valve, accumulator two Another control terminal of position two-way pilot operated directional control valve connects accumulator two-position two-way electromagnetic directional valve, and accumulator bi-bit bi-pass electromagnetism changes Oil return line L is connected to valve；Total output end is connected to permanent thrust accumulator system by oil charge valve.
6. the small-sized fore-and-aft gangway according to claim 1 based on hydraulic system, it is characterised in that: permanent thrust accumulator system packet Include oil-filled pressure reducing valve, oil-filled check valve, oil-filled hand-operated valve, hand-operated valve of draining the oil, oil-filled overflow valve and permanent thrust accumulator；It is oil-filled to subtract Pressure valve, oil-filled check valve, oil-filled hand-operated valve and permanent thrust accumulator are sequentially connected, and oil-filled pressure reducing valve is connected to total output end, puts One end of oily hand-operated valve connects permanent thrust accumulator, and the other end for hand-operated valve of draining the oil connects fuel tank, the input terminal of oil-filled overflow valve Permanent thrust accumulator is connected, the output end of oil-filled overflow valve connects fuel tank；The output end of permanent thrust accumulator is PPEnd.
7. the small-sized fore-and-aft gangway according to claim 1 based on hydraulic system, it is characterised in that: in total output end and flexible electricity Flexible pressure reducing valve is equipped between proportional reversing valve, the X mouth of flexible pressure reducing valve is connected with the first shuttle valve, two input terminals of the first shuttle valve Respectively with flexible first pipeline and flexible second piping connection, the is respectively equipped on flexible first pipeline and second pipeline that stretches One overflow valve.
8. the small-sized fore-and-aft gangway according to claim 1 based on hydraulic system, it is characterised in that: in total output end and revolution electricity Revolution pressure valve is equipped between proportional reversing valve, the X mouth for turning round pressure reducing valve is connected with the second shuttle valve, two input terminals point of the second shuttle valve Not with revolution the first pipeline and turn round the second piping connection.
CN201811307078.2A 2018-11-05 2018-11-05 Small-size step bridge based on hydraulic system Active CN109737110B (en)

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CN110284416A (en) * 2019-06-26 2019-09-27 中船黄埔文冲船舶有限公司 One kind is flexible to pass a bridge
CN114215801A (en) * 2021-11-09 2022-03-22 中船华南船舶机械有限公司 Control method for rotary damping control hydraulic system
CN115432127A (en) * 2022-09-05 2022-12-06 上海峰轶机电工程技术启东有限公司 Boarding ladder
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