CN105179343A - Multi-cylinder synchronous energy-saving efficient hydraulic lifting system and method - Google Patents
Multi-cylinder synchronous energy-saving efficient hydraulic lifting system and method Download PDFInfo
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- CN105179343A CN105179343A CN201510706232.3A CN201510706232A CN105179343A CN 105179343 A CN105179343 A CN 105179343A CN 201510706232 A CN201510706232 A CN 201510706232A CN 105179343 A CN105179343 A CN 105179343A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/04—Driving gear ; Details thereof, e.g. seals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
- B66B9/04—Kinds or types of lifts in, or associated with, buildings or other structures actuated pneumatically or hydraulically
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/10—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks
- B66F7/16—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by one or more hydraulic or pneumatic jacks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/22—Synchronisation of the movement of two or more servomotors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Automation & Control Theory (AREA)
- Civil Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
- Elevator Control (AREA)
Abstract
The invention discloses a multi-cylinder synchronous energy-saving efficient hydraulic lifting system and method which are applicable to lifting systems such as a hydraulic lift and a construction lifting platform. The system comprises an oil compensating loop, a volume speed adjusting and energy recovery loop, a manual lifting loop, a synchronous locking loop, a hydraulic cylinder and an inclined angle sensor. The oil compensating loop is used for compensating for hydraulic oil in a closed-loop system and decreasing the temperature rise of oil, wherein the lack of hydraulic oil is caused by adjustment of the synchronous locking loop and system leakage. The volume speed adjusting and energy recovery loop provides power, speed adjustment and energy recovery for the system. The manual lifting loop is used for manually lifting a platform when the system breaks down, and the synchronous locking loop is used for locking an oil cylinder when multiple hydraulic cylinders are adjusted to move synchronously and the platform is static. The inclined angle sensor detects the pose of the platform in real time and feeds back the pose to a control center to achieve closed-loop control. The system is efficient and saves energy, energy recovery and multi-cylinder accurate synchronization are achieved, the lifting platform is strong in unbalance loading resistance, running is stable, and reliability is high.
Description
Technical field
The present invention relates to a kind of elevating system and method, be especially a kind ofly applicable to hudraulic lift, the multi-cylinder synchronous efficient energy-saving hydraulic lifting system of construction lifting platform and method.
Background technique
The driving mode of elevating system mainly contains traction-type and hydraulic type.Hydraulic driving have large, the stepless speed regulation of exerting oneself, system succinct, control the advantages such as convenient, but hydraulically powered efficiency is on the low side compared to tractive driving." green energy conservation " is the developing goal in elevator system future.At present, electrical-liquid control and volumetric speed control is mostly adopted to control, although achieve the minimizing of the energy loss of ascending for elevator, when elevator is descending in hydraulic elevator system, fluid in oil cylinder, under pressure through descending throttle valve, can cause the temperature rise of hydraulic system.The descending gravitational potential energy of elevator does not only utilize, and is also converted into heat energy and causes fluid temperature rise, and influential system is stablized.
The supporting means of hudraulic lift mainly contains immediate roof lift-type and indirect jacking type.Immediate roof lift-type is simple and compact for structure compared to indirect jacking type, and operational efficiency is high.Current immediate roof lift-type mainly contains middle vertical top type and twin-tub vertical top type.These two kinds of modes are under cabin uneven loading state, and it is comparatively large that oil hydraulic cylinder is subject to lateral force, large to parts depreciations such as elevator guide shoes, is unfavorable for system stable operation.
Summary of the invention
Technical problem: the object of the invention is for problems of the prior art, provides a kind of structure simply compact, energy-conservation, stable, reliability much higher cylinder synchronous power save efficient hydraulic elevating system and method.
Technological scheme: multi-cylinder synchronous efficient energy-saving hydraulic lifting system of the present invention, comprises feed circuit, volumetric speed control and energy recovery circuit, hand-operated lifting loop, the dip sensor of synchronously locking loop, being supported in the multiple oil hydraulic cylinder below lift platform and being installed on lift platform; Described feed circuit is connected with the input end of volumetric speed control and energy recovery circuit, the output terminal of described volumetric speed control and energy recovery circuit is connected with synchronous loop input pipeline of locking, volumetric speed control and energy recovery circuit are connected with hand-operated lifting loop with synchronous locking on the connected pipeline in loop, described each oil hydraulic cylinder is all connected with a locking loop, locking loop is connected with flow divider-combiner and electrohydraulic control respectively, forms the synchronous locking loop to multiple oil hydraulic cylinder by locking loop, flow divider-combiner and electrohydraulic control;
The slippage pump that described feed circuit comprises motor, is connected with motor, the entrance of slippage pump is connected with fuel tank pipeline through filter, repairing delivery side of pump is connected with volumetric speed control and energy recovery circuit pipeline through pumping hole one-way valve, and the export pipeline of one-way valve pumping hole is provided with the relief valve communicated with fuel tank;
Described volumetric speed control and energy recovery circuit comprise accumulator, oil inlet and oil return Pilot operated check valve, oil inlet and oil return solenoid directional control valve, safety valve, frequency control motor, oil hydraulic pump, oil hydraulic motor, generator and lifting solenoid directional control valve, described accumulator is connected with the export pipeline of oil inlet and oil return Pilot operated check valve with pumping hole one-way valve, the control port of oil inlet and oil return Pilot operated check valve is connected with the break-make mouth of oil inlet and oil return solenoid directional control valve, the outlet of oil inlet and oil return Pilot operated check valve and the entrance of the empty one-way valve of anti-suction, the inlet port of oil hydraulic pump is connected with the oil outlet of oil hydraulic motor, described frequency control motor and the input shaft of oil hydraulic pump are mechanically connected, described generator and the output shaft of oil hydraulic motor are mechanically connected, the oil outlet of oil hydraulic pump and safety valve, the entrance of lifting solenoid directional control valve is connected, the filler opening of oil hydraulic motor is connected with the outlet of lifting solenoid directional control valve,
Described hand-operated lifting loop comprises the hydraulic hand-pump be connected with the import and export pipeline of lifting solenoid directional control valve, the Manual descending selector valve be connected with hand-hydraulic pump discharge;
Described synchronous locking loop comprises the flow divider-combiner be connected with the import and export pipeline of lifting solenoid directional control valve; The split-flow opening of described flow divider-combiner is connected with the filler opening of electrohydraulic control, and the split-flow opening of flow divider-combiner is connected with the filler opening of electrohydraulic control; The described entrance in locking loop is connected with the split-flow opening of flow divider-combiner, and the outlet in locking loop is connected with the rodless cavity of corresponding oil hydraulic cylinder.
Described oil hydraulic cylinder is two, three, four, six, eight or ten.
Described locking loop comprise locking Pilot operated check valve, the locking solenoid directional control valve be connected with the control port of locking Pilot operated check valve, with lock Pilot operated check valve unblock hand-operated direction valve in parallel.
The multi-cylinder synchronous efficient energy-saving hydraulic lifting method of said system, comprises the steps:
1. lift platform upwards runs: control the energising of oil inlet and oil return solenoid directional control valve, open oil inlet and oil return Pilot operated check valve, entrance and the outlet conducting of oil inlet and oil return Pilot operated check valve, and the hydraulic oil in accumulator enters oil hydraulic pump and produces driving moment under oil pressure effect; Simultaneously, control frequency control motor and carry out variable frequency volume speed governing, make oil hydraulic pump export pressure and the flow of setting, hydraulic oil enters the rodless cavity of oil hydraulic cylinder after lifting solenoid directional control valve, flow divider-combiner and locking Pilot operated check valve, and lift platform is upwards run;
2. lift platform runs downwards: control locking solenoid directional control valve by electricity, open locking Pilot operated check valve, make outlet and the entrance conducting of locking Pilot operated check valve; Lifting solenoid directional control valve obtains electric, and the deadweight of lift platform makes the rodless cavity hydraulic oil of oil hydraulic cylinder reflux, and rotates, lift platform is run downwards through locking Pilot operated check valve, flow divider-combiner and lifting solenoid directional control valve rear driving oil hydraulic motor; Oil hydraulic motor drive electrical generators rotates generating, realizes the once recovery of energy; The hydraulic oil exported from the oil outlet of oil hydraulic motor is saved accumulator through oil inlet and oil return Pilot operated check valve, realizes the secondary recovery of energy;
3. multi-cylinder synchronization: hydraulic oil is after flow divider-combiner shunting, and the flow passing in and out each oil hydraulic cylinder is roughly equal; According to the real-time angular signal of the dip sensor feedback on lift platform, control electrohydraulic control and the fluid on in-line larger for input hydraulic cylinder flow is discharged oil sump tank through electrohydraulic control, realize multi-cylinder precise synchronization, thus ensure the real-time level of lift platform;
4. manual tune lift platform: when hydraulic lifting system generation power-off or fault, manual tune lift platform, removes unblock hand-operated direction valve and unlocks to left position;
If desired promote lift platform, hydraulic oil is sent into system by manual drives hydraulic hand-pump, and hydraulic oil enters oil hydraulic cylinder rodless cavity through flow divider-combiner and unblock hand-operated direction valve, makes lift platform increase;
If desired decline lift platform, manually pulls Manual descending selector valve to left position, and the hydraulic oil in oil hydraulic cylinder rodless cavity flows back to fuel tank through unlocking hand-operated direction valve, flow divider-combiner and Manual descending selector valve, and lift platform is declined;
After regulating lift platform to desired location, hand reset unlocks hand-operated direction valve and Manual descending selector valve extremely right position, and lift platform is locked.
Beneficial effect: owing to have employed technique scheme, the present invention compared with prior art has the following advantages:
(1) system high efficiency is energy-conservation, realizes energy regenerating: hydraulic lifting system adopts variable frequency volume flow control circuit, realizes up energy-conservation; Hydraulic lifting system adopts generator and accumulator, gravitational potential energy descending for platform is converted to electric energy and hydraulic energy storage, for the energy supplement promoted next time, makes hydraulic system form closed system, achieves the energy-efficient of entire system operation;
(2) multi-cylinder precise synchronization, lift platform offset load resistance is strong: hydraulic lifting system adopts flow divider-combiner coarse synchronization, synchronization error is detected again by the dip sensor on platform, the error of tilt of feedback controls electrohydraulic control through control system, fluid on the in-line of advanced oil hydraulic cylinder is discharged oil sump tank from electrohydraulic control, thus guarantee precise synchronization, the real-time horizontal lifting of implementation platform.Adopt multi-cylinder supporting to promote, improve the offset load resistance of lift platform.
(3) system run all right, reliability is high: hydraulic lifting system adopts volumetric speed control and energy recovery circuit, and system effectiveness is high, and heating value is few, and fluid temperature rise is little, system run all right.System adopts flow divider-combiner to realize oil cylinder coarse synchronization, and electrohydraulic control realizes oil cylinder precise synchronization, and when electro-hydraulic servo defective valve, lift platform still can realize synchronization lifting.System architecture is simple, and the degree of modularity is high, safe and reliable.
Accompanying drawing explanation
Fig. 1 is the hydraulic schematic diagram of total system of the present invention;
Fig. 2 is the hydraulic schematic diagram of feed circuit of the present invention;
Fig. 3 is the hydraulic schematic diagram of volumetric speed control of the present invention and energy recovery circuit;
Fig. 4 is the hydraulic schematic diagram in hand-operated lifting loop of the present invention;
Fig. 5 is the hydraulic schematic diagram in the synchronous locking loop of driving of the present invention three oil hydraulic cylinders;
Fig. 6 is the hydraulic schematic diagram in locking loop of the present invention.
Fig. 7 is the hydraulic schematic diagram in the synchronous locking loop of driving of the present invention two oil hydraulic cylinders;
Fig. 8 is the hydraulic schematic diagram in the synchronous locking loop of driving of the present invention four oil hydraulic cylinders;
Fig. 9 is the hydraulic schematic diagram in the synchronous locking loop of driving of the present invention six oil hydraulic cylinders;
In figure: 1-feed circuit; 2-volumetric speed control and energy recovery circuit; 3-hand-operated lifting loop; 4-synchronously locks loop; 5-oil hydraulic cylinder; 6-lift platform; 6-1-dip sensor; 1-1-filter; 1-2-motor; 1-3-slippage pump; 1-4-pumping hole one-way valve; 1-5-relief valve; 2-1-accumulator; 2-2-oil inlet and oil return Pilot operated check valve; 2-3-oil inlet and oil return solenoid directional control valve; The empty one-way valve of the anti-suction of 2-4-; 2-5-safety valve; 2-6-frequency control motor; 2-7-oil hydraulic pump; 2-8-oil hydraulic motor; 2-9-generator; 2-10-is elevated solenoid directional control valve; 3-1-hydraulic hand-pump; 3-2-Manual descending selector valve; 4-1-flow divider-combiner; 4-2-electrohydraulic control; 4-3-locks loop; 4-31-locks solenoid directional control valve; 4-32-locks Pilot operated check valve; 4-33-unlocks hand-operated direction valve.
Embodiment:
Below in conjunction with the embodiment in accompanying drawing, the invention will be further described:
Embodiment 1, as shown in Figure 1, multi-cylinder synchronous efficient energy-saving hydraulic lifting system, primarily of feed circuit 1, volumetric speed control and energy recovery circuit 2, hand-operated lifting loop 3, synchronous locking loop 4, is supported in the oil hydraulic cylinder 5 below lift platform 6 and the dip sensor 6-1 be installed on lift platform 6 is formed.Described feed circuit 1 is connected with volumetric speed control and energy recovery circuit 2 by pipeline, volumetric speed control and energy recovery circuit 2, hand-operated lifting loop 3 and synchronous locking loop 4 are connected each other by pipeline, each oil hydraulic cylinder 5 is connected with a locking loop 4-3, locking loop 4-3 is connected with flow divider-combiner 4-1 and electrohydraulic control 4-2 respectively, forms the synchronous locking loop 4 to three oil hydraulic cylinders 5 by locking loop 4-3, flow divider-combiner 4-1 and electrohydraulic control 4-2.Feed circuit 1 function is that system is supplemented and regulated and the deficiency of hydraulic oil in the closed-loop system that causes of system leak owing to synchronously locking loop 4, and reduces the temperature rise of fluid in system; Volumetric speed control and energy recovery circuit 2 play as system provides power, speed to regulate and the function of energy regenerating; Manual lifting platform when hand-operated lifting loop 3 function is system malfunctions; Synchronous locking loop 4 function be adjustment three oil hydraulic cylinder 5 synchronization liftings and platform 6 static time locking cylinder; Dip sensor 6-1 function is the pose of real-time detection platform and feeds back to control centre, realizes closed loop control.
As shown in Figure 5, it is the flow divider-combiner 4-1 of 1:2 by the split ratio that pipeline is connected that the synchronous locking loop 4 of described driving three oil hydraulic cylinders comprises with the import and export P of lifting solenoid directional control valve 2-10, the A mouth of flow divider-combiner 4-1 and the A mouth of electrohydraulic control 4-2 with lock loop 4-3 and be connected, the B mouth of flow divider-combiner 4-1 and the B mouth of electrohydraulic control 4-2 and split ratio are that the P mouth of the flow divider-combiner II of 1:1 is connected, the split-flow opening of flow divider-combiner II is connected with locking loop II respectively at electrohydraulic control II, locking loop 4-3 is connected with the rodless cavity of corresponding oil hydraulic cylinder 5.Wherein, after twice shunting, fluid is divided into three parts of roughly equal turnover locking loop 4-3 of flow and oil hydraulic cylinder 5, and electrohydraulic control is used for the turnover flow regulating each oil cylinder further, realizes high-precise synchronization.As long as can streaming error be corrected because servovalve bleeds off very little flow, therefore can adopt the servovalve of small capacity, reduce the cost of system, improve the fast-response of synchronization regulation.
As shown in Figure 2, described feed circuit 1 comprises the filter 1-1 be connected with fuel tank, and mounting filter 1-1 ensure that and enters the clean of hydraulic system oil liquid, ensures the reliability of system cloud gray model; The inlet port of slippage pump 1-3 is connected by pipeline with filter 1-1, the input shaft of motor 1-2 and slippage pump 1-3 is mechanically connected, the A mouth of pumping hole one-way valve 1-4 is connected by pipeline with the oil outlet of slippage pump 1-3, installs the high pressure oil flow-reversing impingement slippage pump 1-3 that pumping hole one-way valve 1-4 prevents the system of entering; Relief valve 1-5 is connected by pipeline with the B mouth of pumping hole one-way valve 1-4, and regulation relief valve 1-5 controls the pressure entering hydraulic system oil liquid.
As shown in Figure 3, described volumetric speed control and energy recovery circuit 2 comprise the accumulator 2-1 and oil inlet and oil return Pilot operated check valve 2-2 that are connected by pipeline with the B mouth of pumping hole one-way valve 1-4.The hydraulic oil of backflow when described accumulator 2-1 is descending for storage platform, realizes energy regenerating; The control port K of described oil inlet and oil return Pilot operated check valve 2-2 is connected with the P mouth of oil inlet and oil return solenoid directional control valve 2-3, fluid turnover accumulator in hydraulic system in both controls; The A mouth of oil inlet and oil return Pilot operated check valve 2-2 is connected with the oil outlet of oil hydraulic motor 2-8 with the B mouth of the empty one-way valve 2-4 of anti-suction, the inlet port of oil hydraulic pump 2-7, installs the empty one-way valve 2-4 of anti-suction and prevents oil hydraulic pump 2-7 from inhaling sky; The input shaft of frequency control motor 2-6 and oil hydraulic pump 2-7 is mechanically connected, the output shaft of described generator 2-9 and oil hydraulic motor 2-8 is mechanically connected, the oil outlet of oil hydraulic pump 2-7 and safety valve 2-5, the A mouth being elevated solenoid directional control valve 2-10 are connected, and the filler opening of oil hydraulic motor 2-8 is connected with the B mouth of lifting solenoid directional control valve 2-10.Wherein, safety valve 2-5 controls the maximum pressure entering oil hydraulic cylinder fluid, the safety of safeguards system; Lifting solenoid directional control valve 2-10 is for controlling the traffic direction of lift platform;
As shown in Figure 4, described hand-operated lifting loop 3 comprises the hydraulic hand-pump 3-1 and Manual descending selector valve 3-2 that are connected by pipeline with the P mouth of lifting solenoid directional control valve 2-10.Hydraulic hand-pump 3-1 comprises filter, hand pump and one-way valve, and Manual descending selector valve 3-2 is bi-bit bi-pass hand-operated direction valve.
As shown in Figure 6, described locking loop 4-3 comprises locking Pilot operated check valve 4-32, the locking solenoid directional control valve 4-31 be connected with the control port K of locking Pilot operated check valve 4-32, the unblock hand-operated direction valve 4-33 in parallel with locking Pilot operated check valve 4-32.Wherein, when locking Pilot operated check valve 4-32 is static for lift platform, oil hydraulic cylinder 5 is made to lock pressurize; Locking solenoid directional control valve 4-31 is used for unlocking locking Pilot operated check valve 4-32 when platform is descending; Unlock hand-operated direction valve 4-33 for unlocking locking Pilot operated check valve 4-32 before Manual descending platform during system jam.
Embodiment 2, substantially the same manner as Example 1, exist together mutually slightly, difference is the synchronous locking loop of driving two oil hydraulic cylinders 5.As shown in Figure 7, drive the synchronous locking loop 4 of three oil hydraulic cylinders to comprise with the import and export P of lifting solenoid directional control valve 2-10 by the split ratio that pipeline is connected to be the flow divider-combiner 4-1 of 1:1, the split-flow opening of flow divider-combiner 4-1 respectively with electrohydraulic control 4-2 with lock loop 4-3 and be connected, locking loop 4-3 is connected with the rodless cavity of corresponding oil hydraulic cylinder 5.Wherein, after the flow divider-combiner 4-1 that split ratio is 1:1, fluid is divided into two parts of roughly equal turnover locking loop 4-3 of flow and oil hydraulic cylinder 5, and electrohydraulic control is used for the turnover flow regulating each oil cylinder further, realizes high-precise synchronization.
Embodiment 3, substantially the same manner as Example 1, exist together mutually slightly, difference is the synchronous locking loop of driving four oil hydraulic cylinders.As shown in Figure 8, drive the synchronous locking loop 4 of four oil hydraulic cylinders to comprise with the import and export P of lifting solenoid directional control valve 2-10 by the split ratio that pipeline is connected to be the flow divider-combiner 4-1 of 1:1, the flow divider-combiner II that the shunting outlet of flow divider-combiner 4-1 is 1:1 with electrohydraulic control 4-2 and two split ratios is respectively connected, the split-flow opening of flow divider-combiner II respectively with electrohydraulic control II with lock loop 4-3 and be connected.Locking loop 4-3 is connected with the rodless cavity of corresponding oil hydraulic cylinder 5.Wherein, after twice shunting, fluid is divided into four parts of roughly equal turnover locking loop 4-3 of flow and oil hydraulic cylinder 5, and electrohydraulic control is used for the turnover flow regulating each oil cylinder further, realizes high-precise synchronization.
Embodiment 4, substantially the same manner as Example 1, exist together mutually slightly, difference is the synchronous locking loop of driving six oil hydraulic cylinders.As shown in Figure 9, drive the synchronous locking loop 4 of six oil hydraulic cylinders to comprise with the import and export P of lifting solenoid directional control valve 2-10 by the split ratio that pipeline is connected to be the flow divider-combiner 4-1 of 1:1, the flow divider-combiner II that the shunting outlet of flow divider-combiner 4-1 is 1:2 with electrohydraulic control 4-2 and two split ratios is respectively connected, the A mouth of flow divider-combiner II and the A mouth of electrohydraulic control II with lock loop 4-3 and be connected, the B mouth of flow divider-combiner II and the B mouth of electrohydraulic control II and split ratio are that the P mouth of the flow divider-combiner III of 1:1 is connected, the split-flow opening of flow divider-combiner III is connected with locking loop II respectively at electrohydraulic control III.Locking loop 4-3 is connected with the rodless cavity of corresponding oil hydraulic cylinder 5.Wherein, after shunting, fluid is divided into six parts of roughly equal turnover locking loop 4-3 of flow and oil hydraulic cylinder 5, and electrohydraulic control is used for the turnover flow regulating each oil cylinder further, realizes high-precise synchronization.
The elevating method of multi-cylinder synchronous efficient energy-saving hydraulic lifting system of the present invention, concrete steps are as follows:
1. lift platform upwards runs: after control system receives up-on command, oil inlet and oil return solenoid directional control valve 2-3 obtains electric, unlock oil inlet and oil return Pilot operated check valve 2-2, make the entrance B of oil inlet and oil return Pilot operated check valve 2-2 and outlet A conducting, the hydraulic oil in accumulator 2-1 enters oil hydraulic pump 2-7 and produces driving moment under oil pressure effect; Meanwhile, control system controls frequency control motor 2-6, adopts variable frequency volume speed governing, makes oil hydraulic pump 2-7 export pressure and the flow of setting, realizes energy-efficient; Hydraulic oil enters the rodless cavity of oil hydraulic cylinder 5 after lifting solenoid directional control valve 2-10, flow divider-combiner 4-1 and locking Pilot operated check valve 4-32, and lift platform 6 is upwards run;
2. lift platform runs downwards: after control system receives downlink command, and locking solenoid directional control valve 4-31 obtains electric, unlocks locking Pilot operated check valve 4-32, makes outlet B and the conducting of entrance A mouth of locking Pilot operated check valve 4-32; Lifting solenoid directional control valve 2-10 obtains electric, the deadweight of lift platform 6 makes the rodless cavity hydraulic oil of oil hydraulic cylinder 5 reflux, rotate through locking Pilot operated check valve 4-32, flow divider-combiner 4-1 and lifting solenoid directional control valve 2-10 rear driving oil hydraulic motor 2-8, lift platform 6 is run downwards; Oil hydraulic motor 2-8 drive electrical generators 2-9 rotates generating, realizes the once recovery of energy; The hydraulic oil exported from the oil outlet of oil hydraulic motor 2-8 is saved among accumulator 2-1 through oil inlet and oil return Pilot operated check valve 2-2, realizes the secondary recovery of energy;
3. multi-cylinder synchronization: hydraulic oil is after flow divider-combiner 4-1 shunts, and the flow passing in and out each oil hydraulic cylinder 5 is roughly equal; According to the real-time angular signal that the dip sensor 6-1 on lift platform 6 feeds back, control system controls electrohydraulic control 4-2, fluid on the in-line of oil hydraulic cylinder 5 large for input flow rate is discharged oil sump tank from electrohydraulic control 4-2, realize multi-cylinder precise synchronization, thus ensure lift platform 6 level in real time;
4. manual tune lift platform: when hydraulic lifting system generation power-off or fault, manual tune lift platform 6.First manually pull and unlock hand-operated direction valve 4-33 to the unblock of left position;
If desired promote lift platform 6, hydraulic oil is sent into system by manual drives hydraulic hand-pump 3-1, and hydraulic oil enters oil hydraulic cylinder 5 rodless cavity through flow divider-combiner 4-1 and unblock hand-operated direction valve 4-33, makes lift platform 6 increase;
If desired decline lift platform 6, manually pulls Manual descending selector valve 3-2 to left position, and the hydraulic oil in oil hydraulic cylinder 5 rodless cavity flows back to fuel tank through unblock hand-operated direction valve 4-33, flow divider-combiner 4-1 and Manual descending selector valve 3-2, and lift platform 6 is declined;
After regulating lift platform 6 to desired location, hand reset unlocks hand-operated direction valve 4-33 and Manual descending selector valve 3-2 to right position, and lift platform 6 is locked.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize content of the present invention to do equivalent structure or the conversion of equivalent flow process, or be directly or indirectly used in other relevant technical field, be all in like manner included in protection scope of the present invention.
Claims (4)
1. a multi-cylinder synchronous efficient energy-saving hydraulic lifting system, is characterized in that: it comprise feed circuit (1), volumetric speed control and energy recovery circuit (2), hand-operated lifting loop (3), synchronously lock loop (4), multiple oil hydraulic cylinders (5) of being supported in lift platform (6) below and the dip sensor (6-1) be installed on lift platform (6), described feed circuit (1) is connected with the input end of volumetric speed control and energy recovery circuit (2), the output terminal of described volumetric speed control and energy recovery circuit (2) with synchronously lock loop (4) input end pipeline and be connected, volumetric speed control and energy recovery circuit (2) are connected with hand-operated lifting loop (3) with synchronously locking on pipeline that loop (4) is connected, described each oil hydraulic cylinder (5) is all connected with locking loop (4-3), locking loop (4-3) is connected with flow divider-combiner (4-1) and electrohydraulic control (4-2) respectively, by locking loop (4-3), flow divider-combiner (4-1) and electrohydraulic control (4-2) form the synchronous locking loop (4) to multiple oil hydraulic cylinder (5),
The slippage pump (1-3) that described feed circuit (1) comprises motor (1-2), is connected with motor (1-2), the entrance of slippage pump (1-3) is connected with fuel tank pipeline through filter (1-1), the outlet (A) of slippage pump (1-3) is connected with volumetric speed control and energy recovery circuit (2) pipeline through pumping hole one-way valve (1-4), and outlet (B) pipeline of one-way valve pumping hole (1-4) is provided with the relief valve (1-5) communicated with fuel tank;
Described volumetric speed control and energy recovery circuit (2) comprise accumulator (2-1), oil inlet and oil return Pilot operated check valve (2-2), oil inlet and oil return solenoid directional control valve (2-3), safety valve (2-5), frequency control motor (2-6), oil hydraulic pump (2-7), oil hydraulic motor (2-8), generator (2-9) and lifting solenoid directional control valve (2-10), described accumulator (2-1) is connected with outlet (B) pipeline of pumping hole one-way valve (1-4) with oil inlet and oil return Pilot operated check valve (2-2), the control port (K) of oil inlet and oil return Pilot operated check valve (2-2) is connected with the break-make mouth (P) of oil inlet and oil return solenoid directional control valve (2-3), the outlet (A) of oil inlet and oil return Pilot operated check valve (2-2) and the entrance (B) of the empty one-way valve of anti-suction (2-4), the inlet port of oil hydraulic pump (2-7) is connected with the oil outlet of oil hydraulic motor (2-8), described frequency control motor (2-6) is mechanically connected with the input shaft of oil hydraulic pump (2-7), described generator (2-9) is mechanically connected with the output shaft of oil hydraulic motor (2-8), the oil outlet of oil hydraulic pump (2-7) and safety valve (2-5), the entrance (A) of lifting solenoid directional control valve (2-10) is connected, the filler opening of oil hydraulic motor (2-8) is connected with the outlet (B) of lifting solenoid directional control valve (2-10),
Described hand-operated lifting loop (3) comprise with lifting solenoid directional control valve (2-10) import and export (P) pipeline be connected hydraulic hand-pump (3-1), export with hydraulic hand-pump (3-1) the Manual descending selector valve (3-2) be connected;
Described synchronous locking loop (4) comprises the flow divider-combiner (4-1) be connected with import and export (P) pipeline of lifting solenoid directional control valve (2-10); The split-flow opening (A) of described flow divider-combiner (4-1) is connected with the filler opening (A) of electrohydraulic control (4-2), and the split-flow opening (B) of flow divider-combiner (4-1) is connected with the filler opening (B) of electrohydraulic control (4-3); The entrance of described locking loop (4-3) is connected with the split-flow opening of flow divider-combiner (4-1), and the outlet of locking loop (4-3) is connected with the rodless cavity of corresponding oil hydraulic cylinder (5).
2. multi-cylinder synchronous efficient energy-saving hydraulic lifting system according to claim 1, is characterized in that: described oil hydraulic cylinder (5) is two, three, four, six, eight or ten.
3. multi-cylinder synchronous efficient energy-saving hydraulic lifting system according to claim 1, is characterized in that: described locking loop (4-3) comprise locking Pilot operated check valve (4-32), the locking solenoid directional control valve (4-31) be connected with the control port (K) of locking Pilot operated check valve (4-32), with lock Pilot operated check valve (4-32) unblock hand-operated direction valve (4-33) in parallel.
4. the multi-cylinder synchronous efficient energy-saving hydraulic lifting method of system according to any one of claim 1 ~ 3, is characterized in that comprising the steps:
1. lift platform upwards runs: control oil inlet and oil return solenoid directional control valve (2-3) energising, open oil inlet and oil return Pilot operated check valve (2-2), entrance (B) and outlet (A) conducting of oil inlet and oil return Pilot operated check valve (2-2), the hydraulic oil in accumulator (2-1) enters oil hydraulic pump (2-7) and produces driving moment under oil pressure effect; Simultaneously, control frequency control motor (2-6) and carry out variable frequency volume speed governing, oil hydraulic pump (2-7) is made to export pressure and the flow of setting, hydraulic oil enters the rodless cavity of oil hydraulic cylinder (5) after lifting solenoid directional control valve (2-10), flow divider-combiner (4-1) and locking Pilot operated check valve (4-32), and lift platform (6) is upwards run;
2. lift platform runs downwards: control locking solenoid directional control valve (4-31) by electricity, open locking Pilot operated check valve (4-32), make the outlet (B) of locking Pilot operated check valve (4-32) and entrance (A) conducting; Lifting solenoid directional control valve (2-10) obtains electric, the deadweight of lift platform (6) makes the rodless cavity hydraulic oil of oil hydraulic cylinder (5) reflux, rotate through locking Pilot operated check valve (4-32), flow divider-combiner (4-1) and lifting solenoid directional control valve (2-10) rear driving oil hydraulic motor (2-8), lift platform (6) is run downwards; Oil hydraulic motor (2-8) drive electrical generators (2-9) rotates generating, realizes the once recovery of energy; The hydraulic oil exported from the oil outlet of oil hydraulic motor (2-8) is saved accumulator (2-1) through oil inlet and oil return Pilot operated check valve (2-2), realizes the secondary recovery of energy;
3. multi-cylinder synchronization: hydraulic oil is after flow divider-combiner (4-1) shunting, and the flow passing in and out each oil hydraulic cylinder (5) is roughly equal; According to the real-time angular signal that the dip sensor (6-1) on lift platform (6) feeds back, control electrohydraulic control (4-2) and the fluid on in-line larger for input hydraulic cylinder (5) flow is discharged oil sump tank through electrohydraulic control (4-2), realize multi-cylinder precise synchronization, thus ensure lift platform (6) level in real time;
4. manual tune lift platform: when hydraulic lifting system generation power-off or fault, manual tune lift platform (6), will unlock hand-operated direction valve (4-33) and remove and unlock to left position;
If desired lift platform (6) is promoted, hydraulic oil is sent into system by manual drives hydraulic hand-pump (3-1), hydraulic oil enters oil hydraulic cylinder (5) rodless cavity through flow divider-combiner (4-1) and unblock hand-operated direction valve (4-33), makes lift platform (6) increase;
If desired decline lift platform (6), manually pull Manual descending selector valve (3-2) to left position, hydraulic oil in oil hydraulic cylinder (5) rodless cavity flows back to fuel tank through unlocking hand-operated direction valve (4-33), flow divider-combiner (4-1) and Manual descending selector valve (3-2), and lift platform (6) is declined;
After regulating lift platform (6) to desired location, hand reset unlocks hand-operated direction valve (4-33) and Manual descending selector valve (3-2) extremely right position, and lift platform (6) is locked.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510706232.3A CN105179343B (en) | 2015-10-27 | 2015-10-27 | Multi-cylinder synchronous energy-saving efficient hydraulic lifting system and method |
| RU2017106309A RU2657525C1 (en) | 2015-10-27 | 2015-12-22 | Multi-cylinder synchronous energy efficient high-performance hydraulic lifting system and method of its operation |
| PCT/CN2015/098171 WO2017071027A1 (en) | 2015-10-27 | 2015-12-22 | Multi-cylinder synchronized, power-saving, high-efficiency hydraulic lifting/lowering system and method |
| CA2955713A CA2955713C (en) | 2015-10-27 | 2015-12-22 | A multi-cylinder synchronous energy-saving and efficient hydraulic lift system and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510706232.3A CN105179343B (en) | 2015-10-27 | 2015-10-27 | Multi-cylinder synchronous energy-saving efficient hydraulic lifting system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105179343A true CN105179343A (en) | 2015-12-23 |
| CN105179343B CN105179343B (en) | 2017-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510706232.3A Expired - Fee Related CN105179343B (en) | 2015-10-27 | 2015-10-27 | Multi-cylinder synchronous energy-saving efficient hydraulic lifting system and method |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN105179343B (en) |
| CA (1) | CA2955713C (en) |
| RU (1) | RU2657525C1 (en) |
| WO (1) | WO2017071027A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2017071027A1 (en) | 2017-05-04 |
| RU2657525C1 (en) | 2018-06-14 |
| CA2955713A1 (en) | 2017-04-27 |
| CA2955713C (en) | 2019-05-14 |
| CN105179343B (en) | 2017-03-22 |
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