CN208087096U - One kind being used for the raised high-precision hydraulic synchronous jacking system of large-scale tower crane supernumerary segment - Google Patents
One kind being used for the raised high-precision hydraulic synchronous jacking system of large-scale tower crane supernumerary segment Download PDFInfo
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- CN208087096U CN208087096U CN201820519328.8U CN201820519328U CN208087096U CN 208087096 U CN208087096 U CN 208087096U CN 201820519328 U CN201820519328 U CN 201820519328U CN 208087096 U CN208087096 U CN 208087096U
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Abstract
The utility model discloses one kind being used for the raised high-precision hydraulic synchronous jacking system of large-scale tower crane supernumerary segment.The hydraulic synchronous jacking system includes jacking apparatus, PLC controller, servo motion controller；Jacking apparatus includes jacking cylinder, proportional direction valve, electromagnet cut off valve, pressure sensor, displacement sensor；The differential pressure data for two working chambers of jacking cylinder that PLC controller can be fed back according to two pressure sensors, by controlling proportional direction valve, electromagnet cut off valve acts, and realizes the control to preloaded force；PID calculating can also be carried out by servo motion controller, control the valve core opening size of corresponding proportional direction valve according to the displacement data of the feedback of displacement sensor, realizes the accurate closed-loop control to corresponding jacking cylinder position, jacking speed.The utility model can realize the control to preloaded force, can accurately adjust jacking speed, responsiveness is high, securely and reliably.
Description
Technical field
The utility model belongs to hoisting machinery technical field, is related to a kind of raised suitable for large-scale tower crane standard knot supernumerary segment
Workbench, more particularly to it is a kind of to be used for the raised high-precision hydraulic synchronous jacking system of large-scale tower crane standard knot supernumerary segment.
Background technology
Tower crane is a kind of hoisting apparatus the most commonly used in architectural engineering, and tower crane center pylon is spelled by several standard knots
It fills, tower crane high-lift system common at present is that arm is increased slightly larger than one mark by the section that climbs under arm
Quasi- section height, arm by one section standard knot hang climb section outside platform on, by standard knot feeding climb section in after by its with
Following standard knot connects, and so repeats to realize raising.
Due to structurally and operationally factor problem, large-scale tower crane supernumerary segment increases, standard knot can only be transported on the ground or
In the cushion cap plane of a certain level altitude, former assembled tower crane integral raising is slightly larger than using large-scale synchronization of jacking up equipment
Then the height of one standard knot is added standard knot below assembled tower crane and then connects itself and standard knot above,
It so repeats to realize and increase.
Large-scale synchronization of jacking up equipment generally all realizes jacking operation by hydraulic synchronous jacking system.Hydraulic synchronization lifting system
System includes hydraulic system, electric-control system, and hydraulic system includes multiple master cylinders (jacking cylinder) that can realize hydraulic synchronization lifting.
The jacking rate request of requirement according to client to installation effectiveness, hydraulic synchronous jacking system is not less than 0.3m/min, synchronism
Error is not more than 1.5mm/m, that is to say, that if being failure to actuate there are one master cylinder, it is necessary to be found within the time of 0.3s
And correct, so the response speed to system is more demanding.And it is existing for the raised hydraulic pressure of large-scale tower crane standard knot supernumerary segment
Synchronous jacking system, general control precision is all not high enough, cannot reach above-mentioned response speed requirement.
The load system of jacking includes upper and lower bolt and platform, and pin hole and master cylinder on standard knot are constituted.It is synchronous
Jacking cycle is as follows：Upper bolt is inserted into -->Master cylinder jacks a distance -->Lower bolt is extracted -->Master cylinder jacks a step
It is long -->Lower bolt is inserted into -->Master cylinder falls a distance after rise -->Upper bolt is extracted -->Master cylinder is fallen after rise the bottom of to.Due to steel construction
There are error, the pin hole stress surface on standard knot can not accomplish a same height for processing, after all upper bolts are inserted into, and
It is not bonded completely with pin hole stress surface, master cylinder must there are one do not control stroke, but the action of control stress.Master cylinder
One 10 tons or so of pre- bearing capacity need to be loaded on the basis of zero load can confirm the initial position of synchronization of jacking up.
It is existing to be used for the raised hydraulic synchronous jacking system of large-scale tower crane standard knot supernumerary segment, generally use one and oil cylinder
The balanced valve of connection is imported and exported to prevent load from falling, the pressure sensor that is connect with cylinder efficient chamber using one monitors confession
Oil pressure, and when use ratio direction valve opens the flow of control hydraulic oil by adjusting spool aperture simultaneously in the system, make
The movement that jacking cylinder can be influenced with balanced valve can also interfere with the flow control of proportional direction valve.Moreover, use ratio direction valve
The actual carrying capacity that jacking cylinder can not be monitored with a pressure sensor, can not achieve the control to preloaded force.
Utility model content
The purpose of this utility model is that overcome the deficiencies in the prior art, a set of energy is provided for large-scale tower crane synchronization of jacking up
It enough realizes the high-precision hydraulic synchronous jacking system controlled preloaded force, that is, provides a kind of for the raising of large-scale tower crane supernumerary segment
High-precision hydraulic synchronous jacking system.
The purpose of this utility model is achieved by the following technical solution：
One kind being used for the raised high-precision hydraulic synchronous jacking system of large-scale tower crane supernumerary segment, it includes load platform, jacking
Device, horizontal pin device, console, programmable controller, that is, PLC controller, servo motion controller；Jacking apparatus includes
Jacking cylinder, the jacking hydraulic system being connect with jacking cylinder；Horizontal pin device includes upper and lower two groups, i.e., upper horizontal pin dress
It sets, lower horizontal pin device；Upper and lower horizontal pin device includes sequentially connected horizontal pin, cross cylinder, horizontal hydraulic pressure
System；Load platform is hollow structure, and tower crane (standard knot assembled) is placed in centre；Load platform is divided into upper layer and lower layer, i.e.,
Upper load platform, lower load platform；Lower load platform is equipped with the lower cross cylinder of the jacking cylinder, traverse placed vertically, Yi Jiyu
The lower horizontal pin of the piston rod outer end connection of lower cross cylinder；Upper load platform is located at the upper of the jacking cylinder of jacking apparatus
Face is connect with the piston rod upper end of jacking cylinder；Upper load platform is equipped with the upper cross cylinder of traverse, and oily with upper level
The upper horizontal pin of the piston rod outer end connection of cylinder；Standard section of tower crane is equipped with bolt card slot, can be inserted into horizontal pin dress up and down
The horizontal pin set；
Jacking hydraulic system includes jacking hydraulic synchronization pumping plant, proportion directional valve group；Proportion directional valve group includes a ratio
Proportional direction valve, two electromagnet cut off valve, two pressure sensors；In two working chamber (nothings of proportional direction valve and jacking cylinder
Rod cavity and rod chamber) connection pipeline on be respectively provided with an electromagnet cut off valve and a pressure sensor；Proportional direction valve has four
A port, i.e. P mouthful, A mouthfuls, B mouthfuls, T mouthfuls；It includes fuel tank, hydraulic pump and motor, in-line filter, list to jack hydraulic synchronization pumping plant
To the components such as valve, electromagnetic relief valve, return filter, circulating pump and motor, cooler；Fuel tank is connect with hydraulic pump；Hydraulic pump
Oil outlet oil inlet, that is, P mouthfuls of connection of filter, check valve and proportional direction valve by the road all the way, another way is through electromagnetism overflow
Valve, return filter and fuel tank connect；The A mouths of proportional direction valve, B mouthfuls it is corresponding with the rodless cavity of jacking cylinder, rod chamber respectively
AO mouthfuls of hydraulic fluid port, BO mouthfuls of connections；Oil outlet, that is, T mouthfuls of proportional direction valve is connect through return filter with fuel tank；In jacking cylinder
Displacement sensor is equipped at piston rod；
Console is equipped with the touch screen of input/output；Programmable controller i.e. PLC controller is installed in console,
The servo motion controller being connect with PLC controller is also equipped in console；Two pressure sensors are directly and PLC controller
Connection；Displacement sensor is connect by servo motion controller with PLC controller；Proportional direction valve, the electricity of jacking hydraulic system
Magnetic shut-off valve is connect with PLC controller；Two working chambers of jacking cylinder that PLC controller can be fed back according to two pressure sensors
Differential pressure data, pass through and control proportional direction valve, electromagnet cut off valve action, realize control to preloaded force；PLC controller
The displacement data for the jacking cylinder piston rod that can be fed back according to displacement sensor carries out PID calculating by servo motion controller,
And by the valve core opening size for controlling corresponding proportional direction valve, realize the piston rod position to corresponding jacking cylinder,
Jack the accurate closed-loop control of speed.
Further, proportion directional valve group further includes accumulator, accumulator ball valve, valve block；A valve block i.e. oil path block, control
Hydraulic working oil processed, proportional direction valve, accumulator, accumulator ball valve, pressure sensor, electromagnet cut off valve are arranged at valve block
On.Accumulator is connect by accumulator ball valve with proportional direction valve oil inlet, the pulsation damping for absorbing hydraulic pump and mitigation
Impact.
Further, the electromagnet cut off valve is the normally closed type electromagnet cut off valve of emergency cut-off when opening, powering off when being powered.
Electromagnet cut off valve is opened when being powered, emergency cut-off when power-off；When proportion directional valve events, electromagnet cut off valve is opened, and system is just
Often action；When proportional direction valve stopping action or system fault, power-off, electromagnet cut off valve is closed immediately, locks jacking cylinder
Position.
Further, jacking cylinder one end is flange arrangement, referred to as flange end；The other end is ear-ring structure, referred to as
Earrings end；Flange end is installed on lower load platform, and earrings end is connect with upper load platform；Jacking cylinder is divided into four groups, every group
There are two jacking cylinders；The earrings end rigid connection of every group of two jacking cylinders；A displacement sensing is arranged in every group of jacking cylinder
The displacement overhang of every group of jacking cylinder piston rod is fed back in device, in real time detection.
Further, horizontal hydraulic pressure system (horizontal pumping plant) include fuel tank, gear hydraulic pump and motor, overflow valve, two
Four way solenoid valve, four three-position four-way electromagnetic directional valves, check valve, pressure gauge, oil absorption filter, return filters；Three four
Electric change valve tool is there are four port, i.e. P mouthfuls, A mouthfuls, B mouthfuls, T mouthfuls；Fuel tank is connect with gear hydraulic pump；Gear hydraulic pumps out
Hydraulic fluid port is connected through two-position four-way solenoid valve, return filter and fuel tank all the way after check valve, pressure gauge, and another way is through overflowing
Stream valve is connected to oil inlet i.e. P mouthfuls of four three-position four-way electromagnetic directional valves；The A mouths of three-position four-way electromagnetic directional valve, B mouthfuls of difference
Hydraulic fluid port connection corresponding with two working chamber, that is, rodless cavities, the rod chamber of cross cylinder；The oil outlet of three-position four-way electromagnetic directional valve
That is it T mouthfuls, is connect with fuel tank through return filter；Four three-position four-way electromagnetic directional valves are connect with PLC controller, PLC controller
Can by control three-position four-way electromagnetic directional valve action, realize horizontal pin into and out；In the piston rod of cross cylinder
Near outer ends are equipped with close to switch, this connect close to switch with PLC controller；PLC controller can be according to close to switch feedback
Horizontal pin is inserted into the insertion situation information of the bolt card slot on tower crane tower body, determines whether that jacking cylinder synchronizes top
Rise action.
Further, port there are two two-position four-way solenoid valve tools, i.e. P mouthfuls, A mouthfuls, B mouthfuls, T mouthfuls；Gear hydraulic pump is switched on
When, the electromagnet of two-position four-way solenoid valve not it is electric, two-position four-way solenoid valve is in the positions P-B, the P of two-position four-way solenoid valve into
Mouthful and the outlets B communicates, the fluid exported from gear hydraulic pump oil outlet, after check valve, fluid is from two-position four-way electromagnetism
The P imports of valve are entered, B exports out, and fuel tank, gear hydraulic pumping plant off-load are returned to by return filter；Cross cylinder works
When, the electromagnet of two-position four-way solenoid valve obtains electric, and two-position four-way solenoid valve is in the positions P-A, and the A mouths of two-position four-way solenoid valve are not
Fluid that is logical, being exported from gear hydraulic pump oil outlet, after check valve, fluid is changed by overflow valve, 3-position 4-way electromagnetism
Enter cross cylinder to valve, pressure is established in cross cylinder.
The beneficial effects of the utility model：
The utility model compared with prior art, has the following advantages：
(1) the utility model by PLC closed-loop controls instead of in traditional large-scale tower crane jacking hydraulic system by manual
The mode of throttle valve control cylinder jacking speed ensure that the synchronism of large-scale tower crane jacking.And large-scale tower crane is prevented to push up
During rising, multiple Jacking points for being generated due to manual operation jacking speed it is inconsistent and caused by tower body inclining, protect
Demonstrate,prove the safety in operating process.
(2) the utility model can accurately adjust jacking speed, and have and be the discovery that synchronization automatically within the time of 0.3s
Property inconsistent jacking cylinder, and corrected, responsiveness is high, securely and reliably.
(3) control to preloaded force can be realized.Before each synchronization of jacking up, jacking apparatus with must have one by top component
A preloading action fitted closely, the top lift of the action request jacking apparatus control in a certain range, such as 10 tons.By
In proportional direction valve adjusting spool aperture, being bound to cause on two fuel-displaced A mouths/B mouth has pressure, and with opening size
Variation is unable to control above-mentioned pre- jacking load according to the pressure of jacking working chamber merely, according to practical measurement and checking computations, this practicality
Novel one pressure sensor of each installation in proportional direction valve inlet and outlet is used in combination and seeks two chambers of oil cylinder (rodless cavity and rod chamber)
The computational methods of force difference realize Loading Control.
(4) it is put down instead of traditional using the normally closed type electromagnet cut off valve of emergency cut-off logic when opening, powering off when being powered
Weigh valve, and electromagnet cut off valve does not interfere with the movement of jacking cylinder, will not interfere flow control.When system fault or power-off,
Electromagnet cut off valve is closed immediately, locking jacking cylinder position.It makes it easier for controlling.
(5) the constant gain constant for making hydraulic system of charge oil pressure is maintained using accumulator, synchronization of jacking up action is made to be more easy to
In control.Accumulator effectively absorbs vibrations, protects hydraulic system element and associated mechanical components, extends system and uses the longevity
Life.
(6) the utility model only needs an operating personnel to carry out operation and control, easy to operate.Eliminate traditional large-scale tower crane
In jacking hydraulic system operating process, each Jacking point need to be equipped with operating personnel and adjust the jacking of manual throttle valve control cylinder in real time
Speed.Manpower and operating time are saved, working efficiency is increased.
Description of the drawings
Fig. 1 is the jacking hydraulic system schematic diagram in the utility model；
Fig. 2 is the horizontal hydraulic pressure systematic schematic diagram in the utility model；
Fig. 3 is the structure for the raised high-precision hydraulic synchronous jacking system of large-scale tower crane supernumerary segment in the utility model
Schematic diagram.
Fig. 1 is jacked in pumping plant：1- fuel tanks, 2- hydraulic pumps, 3- motors, 4- in-line filters, 5- liquid level gauges, 6- oil drain valves,
7- return filters, 8- circulating pumps, 9- circulating pump motors, 10- coolers, 11- liquid-level switches, 12- oil temperature switches, 13- air
Filter, 14- electromagnetic relief valves, 15- check valves, 16- pressure gauges, 17- pressure sensors, 18- valve blocks, 19- proportional direction valves,
20- accumulators, 21- accumulator ball valves, 22- electromagnet cut off valve, 23- pressure sensors, 24- jacking cylinders, 25- displacement sensings
Device.
In the horizontal pumping plant of Fig. 2：26- fuel tanks, 27- gear hydraulic pumps, 28- oil absorption filters, 29- motors, 30- liquid levels
Meter, 31- air cleaners, 32- check valves, 33- return filters, 34- pressure gauges, 35- two-position four way change valves, 36- overflows
Valve, 37- three position four-way directional control valves, 38- cross cylinders, the close switches of 39-.
In Fig. 3：24- jacking cylinders, 40- tower cranes (assembled standard knot), the upper load platforms of 41-, load is flat under 42-
Platform, the upper horizontal pins of 43-, horizontal pin under 44-.
Specific implementation mode
The utility model is further described below in conjunction with drawings and examples.
Embodiment
As shown in figure 3, the utility model one kind being used for the raised high-precision hydraulic synchronous jacking system of large-scale tower crane supernumerary segment,
It includes load platform, jacking apparatus, horizontal pin device, console, programmable controller (PLC controller), servo motion
Controller；The jacking hydraulic system that jacking apparatus includes jacking cylinder 24, is connect with jacking cylinder；Horizontal pin device include according to
The horizontal pin of secondary connection, cross cylinder 38, horizontal hydraulic pressure system；Horizontal pin device includes upper and lower two groups, i.e., upper horizontal slotting
Pin assembly, lower horizontal pin device；Load platform is hollow structure, and tower crane 40 (assembled standard knot) is placed in centre；Load
Platform is divided into upper layer and lower layer, i.e., upper load platform 41, lower load platform 42；Lower load platform 42 is equipped with the jacking cylinder placed vertically
24, the lower cross cylinder 39 of traverse, and the lower horizontal pin 44 that is connect with the piston rod outer end of lower cross cylinder 39；Upper load
Platform 41 is located at the upper surface of the jacking cylinder 24 of jacking apparatus, is connect with the piston rod upper end of jacking cylinder 24, upper load platform
41 are carried by the piston rod of jacking cylinder 24 below；Upper load platform 41 be equipped with traverse upper cross cylinder 39, and with it is upper
The upper horizontal pin 43 of the piston rod outer end connection of cross cylinder 39；40 standard knot of tower crane is equipped with pin hole (bolt card slot),
The horizontal pin (upper horizontal pin 43 and lower horizontal pin 44) that can be inserted into horizontal pin device up and down, passes through upper and lower horizontal pin
And load platform bearer tower crane 40 up and down.
Jacking apparatus is the executing agency of hydraulic synchronous jacking system, and jacking apparatus includes four groups of jacking cylinders 24, jacking
Hydraulic system；Upper load platform 41 can be synchronized by four groups of 24 synchronizations of jacking up of jacking cylinder and be jacked up by jacking apparatus.
Horizontal pin device is the auxiliary executing agency of hydraulic synchronous jacking system, and horizontal pin device includes upper horizontal slotting
Pin assembly, lower horizontal pin device；Upper horizontal pin device includes horizontal pin on four groups, cross cylinder, horizontal liquid on four groups
Pressure system, lower horizontal pin device include horizontal pin under four groups, cross cylinder, horizontal hydraulic pressure system under four groups.Horizontal pin
It is driven by cross cylinder 38 and is inserted into and extracts.When horizontal pin 44 is inserted under four groups, standard section of tower crane is by lower load platform 42
Carrying；When horizontal pin 43 is inserted on four groups, standard section of tower crane is carried by upper load platform 41, and can be with jacking cylinder 24
Synchronization of jacking up drives standard section of tower crane to increase.
Entire hydraulic system is divided into jacking hydraulic system and horizontal hydraulic pressure system；Jacking hydraulic system includes two jacking liquid
The synchronous pumping plant of pressure and four proportion directional valve groups；Horizontal hydraulic pressure system includes two horizontal pumping plants.Hydraulic system is according to console
Instruction execution relevant action, drive corresponding oil cylinder piston rod stretch out and retraction.
Jacking apparatus includes 24, two jacking hydraulic synchronization pumping plants, four proportion directional valve groups of eight jacking cylinders.Jacking
24 one end of oil cylinder is flange arrangement, referred to as flange end；The other end is ear-ring structure, referred to as earrings end；Flange end is installed on
On lower load platform, earrings end is connect with upper load platform；Jacking cylinder is divided into four groups, and every group has two jacking cylinders；Every group
The earrings end rigid connection of two jacking cylinders；One displacement sensor is set at the piston rod of every group of jacking cylinder, in real time
The displacement overhang of detection every group of jacking cylinder piston rod of feedback.
Jack the power source that hydraulic synchronization pumping plant is jacking apparatus.As shown in Figure 1, every jacking hydraulic synchronization pumping plant includes
One 3, two, motor, 15, two electromagnetic relief valve of check valve of in-line filter 4, two of hydraulic pump 2, two of fuel tank 1, two
14,9, coolers 10 of circulating pump motor of circulating pump 8, one of return filter 7, one, further include being located at hydraulic pump 2
The pressure sensor 17 on pipeline that outlet (or check valve 15 export) is connect with the oil inlet (i.e. P mouthfuls) of proportional direction valve 19,
Pressure gauge 16, and be located on fuel tank 1 oil temperature switch 12, liquid-level switch 11, liquid level gauge 5, oil drain valve 6, air cleaner 13
Equal hydraulic services.Circulating pump 8 is used to drive the oil circulation in cooler 10.Two electromagnetic relief valves 14 when being switched on for establishing
Jacking cylinder pressure.
As shown in Figure 1, every proportion directional valve group includes an accumulator of proportional direction valve 19, one of valve block 18, one
20, an electromagnet cut off valve 22 of pressure sensor 23, two of accumulator ball valve 21, two.An one valve block i.e. oil path block is
A square of hydraulic working oil is controlled, it is equivalent to a mounting bracket, proportional direction valve, accumulator, accumulator ball valve, pressure
Force snesor, electromagnet cut off valve are arranged in valve block.Accumulator 20 passes through accumulator ball valve, pipeline and proportional direction valve 19
(i.e. P mouthfuls) connection of oil inlet, the pulsation damping for absorbing hydraulic pump and mitigation impact.Each proportion directional valve group controls 1 group
Two jacking cylinders (master cylinder) act, and load platform 41 lifts in realization.
Two pressure sensors 23 detect the pressure on two, the chamber AO/BO mouths of jacking cylinder 24 two respectively, pass through calculating
The method of the pressure difference of two chambers of jacking cylinder (rodless cavity and rod chamber) realizes Loading Control, before making each synchronization of jacking up, on
Horizontal pin is fitted closely with the bolt card slot on tower crane tower body, and can control the top lift, will not jack up tower crane.
Proportional direction valve 19 is a kind of 3-position 4-way, and the parameter of exported fluid can be made with the variation of input electrical signal parameter
And proportional hydraulic control valve, it has there are four port, i.e. P mouthfuls, A mouthfuls, B mouthfuls, T mouthfuls.Fuel tank 1 is connect with hydraulic pump 2；Hydraulic pressure
Pumping 2 oil outlets, filter 4, check valve 15 are connect with the oil inlet (P mouthfuls) of proportional direction valve 19 by the road all the way；Another way is through electricity
Magnetic overflow valve 14, return filter 7 are connect with fuel tank 1；The A mouths of proportional direction valve 19, B mouthfuls respectively pass through electromagnet cut off valve with top
Rodless cavity, the rod chamber of oil-lifting jar 24 correspond to hydraulic fluid port connection；The oil outlet (T mouthfuls) of proportional direction valve 19 through return filter 7 with
Fuel tank 1 connects.
When jacking cylinder rises, the P mouths of proportional direction valve 19 are logical with A mouthfuls, and B mouthfuls logical with T mouthfuls, the output that hydraulic pump 2 exports
Fluid reaches proportional direction valve 19 by in-line filter 4, check valve 15, enters from the oil inlet (P mouthfuls) of proportional direction valve 19,
It is come out from the A mouths of proportional direction valve 19, the AO mouths of jacking cylinder 24 is entered by electromagnet cut off valve 22-1, drive jacking cylinder 24
Piston rod rise after, come out from the BO mouths of jacking cylinder 24, the B mouths of proportional direction valve 19 entered through electromagnet cut off valve 22-2,
It is come out from T mouthfuls, the return filter 7 through 1 top of fuel tank returns in fuel tank 1.When jacking cylinder declines, the P of proportional direction valve 19
Mouth is logical with B mouthfuls, and A mouthfuls logical with T mouthfuls, and fluid comes out from the B mouths of the proportional direction valve 19 of proportional direction valve 19, passes through electromagnet cut off valve
22-2 enters the BO mouths of jacking cylinder 24 and is come out from the AO mouths of jacking cylinder 24 after the piston rod decline of driving jacking cylinder 24,
The A mouths for entering proportional direction valve 19 through electromagnet cut off valve 22-1, come out from T mouthfuls, and the return filter 7 through 1 top of fuel tank returns to
In fuel tank 1.
Jacking hydraulic system uses unit plunger pump (i.e. hydraulic pump 2) centralized oil supply, every group of jacking cylinder to share a position
Displacement sensor feeds back displacement data, shares a proportion directional valve group and carries out displacement closed-loop control to it, by console
Displacement synchronous precision between PLC and servo motion controller automatic adjustment each group jacking cylinder, remains assembled part
The stationarity of tower crane.
Console is equipped with the touch screen of input/output；Programmable controller i.e. PLC controller is installed in console,
It is also equipped with the servo motion controller being connect with PLC controller, displacement sensor is controlled by servo motion controller and PLC
Device connects；Two pressure sensors are directly connect with PLC controller；19, two electromagnet cut off valve 22 of proportional direction valve are controlled with PLC
Device connection processed.PLC controller can be fed back (anti-according to pressure sensor, displacement sensor by pressure sensor, displacement sensor
The data of feedback), control proportional direction valve 19, electromagnet cut off valve 22 act.All executing agency's actions of consing, at the same it is real
When monitor tower crane athletic posture, once overproof, system is alarmed immediately, it is ensured that safety.
Synchronization of jacking up uses servo motion controller, carries out PID calculating by hardware, is not take up main PLC computing capabilitys resource.
Servo motion controller is installed in console, is connect with PLC.According to the data feedback to each displacement sensor, control corresponds to
Proportional direction valve valve core opening size, realize that the position to the piston rod of corresponding jacking cylinder, jacking speed carry out essence
True closed-loop control.
According to two pressure sensors imported and exported mounted on proportional direction valve, two working chambers of jacking cylinder are calculated
Pressure difference, be compared with 10 tons of pre-jacking force loaded values of setting；When not reaching setting value, proportional direction valve 19 is opened completely
Fuel feeding；After reaching setting value, proportional direction valve 19 completely closes, and completes 10 tons and preloads control.
Electromagnet cut off valve 22 is the normally closed type electromagnet cut off valve of emergency cut-off when opening, powering off when being powered.Electromagnet cut off valve
22 open when being powered, emergency cut-off when power-off.When proportional direction valve 19 acts, electromagnet cut off valve 22 is opened, and system is normally moved
Make；When 19 stopping action of proportional direction valve or system fault, power-off, electromagnet cut off valve 22 is closed immediately, locks jacking cylinder
24 position.
Horizontal pin device is divided into horizontal pin device, lower horizontal pin device；Every group of horizontal pin device includes four
A horizontal pin, four cross cylinders, 1 horizontal pumping plant.Each upper and lower horizontal pin corresponds to 1 group of jacking cylinder arrangement.
Horizontal pumping plant is the power source of horizontal pin device；As shown in Fig. 2, horizontal pumping plant includes a fuel tank 26, one
29, one, the motor 3-position 4-way electromagnetism of two-position four-way solenoid valve 35, four of overflow valve 36, one of gear hydraulic pump 27, one changes
To the hydraulic services such as valve 37 and oil absorption filter 28, return filter 33, check valve 32, pressure gauge 34.Pressure gauge 34 is used for
Pump station pressure detects and monitoring.
The tool of three-position four-way electromagnetic directional valve 37 is there are four port, i.e. P mouthfuls, A mouthfuls, B mouthfuls, T mouthfuls.Fuel tank 26 and gear hydraulic pump
27 connections；27 oil outlet of gear hydraulic pump is after check valve 32, pressure gauge 34, all the way through two-position four-way solenoid valve 35, oil return
Filter 33 is connect with fuel tank 26, and another way is connected to the oil inlet (P of four three-position four-way electromagnetic directional valves 37 through overflow valve 36
Mouthful)；The A mouths of three-position four-way electromagnetic directional valve 37, B mouthfuls respectively hydraulic fluid port corresponding with the rodless cavity of cross cylinder 38, rod chamber connect；
The oil outlet (T mouthfuls) of three-position four-way electromagnetic directional valve, connect through return filter with fuel tank.
The fluid exported from 27 oil outlet of gear hydraulic pump, after check valve 32, pressure gauge 34, all the way through two four
Three-way electromagnetic valve 35 and return filter 33 return to fuel tank 26, and another way branches to four 3-position 4-way electromagnetism after overflow valve 36
Reversal valve 37；Fluid enters from the P mouths of three-position four-way electromagnetic directional valve 37, and A or B mouthfuls come out, into the rodless cavity of cross cylinder
Or rod chamber, then come out from the T mouths of three-position four-way electromagnetic directional valve 37, the return filter 33 through 26 top of fuel tank returns to fuel tank
In 26.
The tool of two-position four-way solenoid valve 35 is there are four port, i.e. P mouthfuls, A mouthfuls, B mouthfuls, T mouthfuls.When gear hydraulic pump 27 is switched on, two
The electromagnet of position four-way solenoid valve 35 not it is electric, two-position four-way solenoid valve 35 is in the positions P-B, the P of two-position four-way solenoid valve 35
Import and the outlets B communicate；The fluid exported from 27 oil outlet of gear hydraulic pump, after check valve 32, pressure gauge 34, fluid
From the P imports of two-position four-way solenoid valve 35 are entered, B exports out, fuel tank 26, gear hydraulic pump are returned to by return filter 33
Stand off-load (i.e. be switched on when release, due in four three-position four-way electromagnetic directional valves 37 position be it is O-shaped, booting release can avoid its
Booting or booting are impacted by maximum pressure when not working).When cross cylinder 38 works, the electricity of two-position four-way solenoid valve 35
Magnet obtains electric, and two-position four-way solenoid valve 35 is in the positions P-A, and the A mouths of two-position four-way solenoid valve 35 are obstructed；From gear hydraulic pump 27
The fluid of oil outlet output, after check valve 32, pressure gauge 34, fluid is by overflow valve 36,3-position 4-way electromagnetic switch
Valve 37 enters cross cylinder 38, and pressure is established in cross cylinder 38.
When the piston rod of cross cylinder 38 moves right, the P mouths of three-position four-way electromagnetic directional valve 37 are logical with A mouthfuls, B mouthfuls and T
Mouth is logical, and fluid is entered from the P mouths of three-position four-way electromagnetic directional valve 37, and A mouthfuls come out, by the road into cross cylinder 38 without bar
Chamber, the fluid come out from the rod chamber of cross cylinder 38 enters the B mouths of three-position four-way electromagnetic directional valve 37 by pipeline, from T mouthfuls
After out, the return filter 33 through 26 top of fuel tank returns in fuel tank 26.When the piston rod of cross cylinder 38 moves downward, three
The P mouths of position four-way electromagnetic reversing valve 37 lead to B mouthfuls, and A mouthfuls logical with T mouthfuls, and fluid goes out from the B mouths of three-position four-way electromagnetic directional valve 37
Come, enter the rod chamber of cross cylinder 38 by the road, the fluid come out from the rodless cavity of cross cylinder 38 enters three by the road
The A mouths of four-way electromagnetic reversing valve 37, after T mouthfuls come out, the return filter 33 through 26 top of fuel tank returns in fuel tank 26.It is horizontal
Four three-position four-way electromagnetic directional valves 37 of hydraulic system are connect with PLC controller, and PLC controller can be by controlling 3-position 4-way
Electromagnetic switch valve events, realize horizontal pin into and out.
It is equipped with close to switch 39 in the piston rod near outer ends of cross cylinder 38, is connect close to switch 39 with PLC controller.
When the pin hole (bolt card slot) that the piston rod of cross cylinder 38 drives horizontal pin to be inserted on the standard knot of tower crane 40 is interior, connect
Nearly switch 39 can show the insertion situation of horizontal pin.PLC controller can be inserted into tower according to the horizontal pin close to switch feedback
The insertion situation information of bolt card slot with tower crane determines whether that jacking cylinder synchronizes jacking action.
It is carried out using above-mentioned high-precision hydraulic synchronous jacking system (using above-mentioned hydraulic synchronization lifting control method) large-scale
The hydraulic synchronization lifting supernumerary segment of tower crane increases method, is as follows：
S1：When beginning, tower crane 40 is positioned over by ground loading among load platform.Pass through consing controlled level
Oil cylinder 38 drives upper horizontal pin 43 to insert the bolt card slot on standard section of tower crane, and (horizontal pin is also not fully inserted into tower crane at this time
In bolt card slot on 40 standard knots), it is inserted into situation close to the upper horizontal pin 43 of the display of switch 39.
S2：Pre-jacking force loaded value is inputted in console；By console, operation jacking cylinder 24 pushes up in advance, and PLC controller is real
When acquisition it is corresponding with jacking cylinder two working chambers (rodless cavity and rod chamber) hydraulic fluid port, that is, AO/BO mouthfuls connect two pressure sensings
The pressure data of device 23 passes through calculating according to the pressure data of two working chambers of jacking cylinder of two pressure sensors feedback
The method of the pressure difference of two working chambers of jacking cylinder calculates the real-time bearing capacity of jacking cylinder；By calculated jacking cylinder reality
When bearing capacity and the pre-jacking force loaded value (10 tons) of setting be compared；When not reaching the pre-jacking force loaded value of setting, ratio side
It is opened completely to valve 19, electromagnet cut off valve 22 is opened, and the piston rod of jacking cylinder 24 starts to act (rising) upwards；When reaching
When pre-jacking force loaded value (10 tons) of setting, (standard with the 43 contact tower tower crane 40 of upper horizontal pin on upper load platform 41
On section) bolt card slot (at this point, upper horizontal pin is fully inserted into the pin hole on 40 standard knot of tower crane, with pin hole by
Power face is bonded completely, also that is, upper horizontal pin is fitted closely with the bolt card slot on tower crane tower body), proportional direction valve 19 is complete
It closes, electromagnet cut off valve 22 is closed, and the piston rod of jacking cylinder 24 acts stopping upwards.
S3：After reaching pre-jacking force, the piston rod synchronization of jacking up of all jacking cylinders 24 is controlled by consing, is jacked
Oil cylinder 24 drives upper load platform 41 to carry tower crane 40 and jacks；PLC controller in console is according to each displacement sensor reality
When detection feedback jacking cylinder piston rod displacement overhang, pass through servo motion controller carry out PID calculating, control electromagnetism cut
Only valve 22 is opened, and controls the valve core opening amount size of each proportional direction valve 19, synchronizes correction, ensures that tower crane steadily rises；
Meanwhile the accumulator 20 by being connected absorbs the pulsation damping of hydraulic pump and mitigates impact in real time, keeps jacking stable action；
S4：In console in real time by 25 Real-time Feedback tower crane of displacement sensor, 40 top lifting height, when 40 lower section foot of tower crane
When being enough put into a standard knot, stop jacking action, proportional direction valve 19 is closed, and electromagnet cut off valve 22 is closed, locking jacking oil
The piston rod position of cylinder 24；
S5：It waits for that the standard knot of supernumerary segment is put into 40 lower section of tower crane by one, all jacking cylinders is controlled by consing
24 piston rod, which synchronizes to decline, makes tower crane 40 be near the mark section, and tower crane and standard knot, tower crane supernumerary segment is bolted；
S6：24 synchronization of jacking up of all jacking cylinders is controlled by consing, the jacking of supernumerary segment tower crane is driven, reserves lower water
Plug flat pin is inserted into gap；
S7：After in place, lower horizontal pin 44 is driven to be inserted into 40 standard of tower crane by consing controlled level oil cylinder 38
Bolt card slot on section is inserted into situation close to the lower horizontal pin 44 of the display of switch 39；
S8：It controls all jacking cylinders 24 by consing and synchronizes and decline, lower horizontal pin 44 is made to carry supernumerary segment tower
It hangs；Also, upper horizontal pin 43 is driven to extract by consing controlled level oil cylinder 38, close to the upper level of the display of switch 39
Bolt 43 extracts situation；
S9：It controls all jacking cylinders 24 by consing and synchronizes and decline, jacking cylinder 24 drives upper load platform
41 decline, and prepare for synchronization of jacking up next time.
In the above method, further include：PLC controller is inserted into according to the horizontal pin close to switch feedback on tower crane tower body
The insertion situation information of bolt card slot determines whether that jacking cylinder synchronizes jacking action.Horizontal pin is divided into water
Plug flat pin and lower horizontal pin.Upper horizontal pin and lower horizontal pin, which have following several situations, allows PLC controller to make a decision：
1, upper horizontal pin and lower horizontal pin are all not inserted into：Such case is generally present in equipment when just installing, i.e., on
State state in method and step S1, intermediate tower crane is judged by ground loading, at this moment PLC controller, allow jack-up system into
Row synchronization of jacking up and lowering action are exactly unloaded synchronous.
2, upper horizontal pin is inserted into, and lower horizontal pin is not inserted into：Such case is mainly state when loading synchronization of jacking up,
That is state in above method step S2~S6, upper horizontal pin bearing carrier drive carried component synchronization of jacking up or decline,
At this moment PLC controller judges, and jack-up system is allowed to synchronize jacking and lowering action.
3, upper horizontal pin is not inserted into, and lower horizontal pin is inserted into：Such case is mainly the state of inverted engine, the i.e. above method
State in step S9, the state that as synchronization of jacking up next time is prepared, lower horizontal pin bearing carrier, upper horizontal pin are unloaded
Retraction is prepared for jacking next time, and at this moment PLC controller judges, and jack-up system is allowed to synchronize jacking and decline
Action, and it is unloaded synchronous.
4, upper horizontal pin and lower horizontal pin are all inserted into：Such case possibly is present above method step S7~S8
In, after being inserted into lower horizontal pin, forget to extract upper horizontal pin, may cause all to be inserted into upper and lower horizontal pin in this way
In the case of synchronize the maloperation of jacking or decline, cause horizontal pin that component is driven to rise or fall, but lower horizontal insert
Pin is restricted, and the case where ultimately causing component damage occurs, and does not allow in this way.
So being mainly used for judging the state that upper horizontal pin, lower horizontal pin are current close to switch, then prevent
The occurrence of stating the 4th kind.PLC controller judges, when system is in the 4th kind of situation, to send out alarm, meanwhile, do not allow to jack
System synchronizes jacking, step-down operation.
Claims (6)
1. one kind being used for the raised high-precision hydraulic synchronous jacking system of large-scale tower crane supernumerary segment, which is characterized in that
It includes load platform, jacking apparatus, horizontal pin device, console, PLC controller, servo motion controller；Jacking
The jacking hydraulic system that device includes jacking cylinder, is connect with jacking cylinder；Horizontal pin device includes upper and lower two groups, i.e., upper water
Plug flat pin assembly, lower horizontal pin device；Upper and lower horizontal pin device include sequentially connected horizontal pin, cross cylinder,
Horizontal hydraulic pressure system；Load platform is hollow structure, and it is the standard knot assembled that tower crane is placed in centre；Load platform is divided into upper and lower two
Layer, i.e., upper load platform, lower load platform；Lower load platform is equipped with the lower cross cylinder of the jacking cylinder, traverse placed vertically, with
And the lower horizontal pin being connect with the piston rod outer end of lower cross cylinder；Upper load platform is located at the jacking cylinder of jacking apparatus
Above, it is connect with the piston rod upper end of jacking cylinder；Upper load platform be equipped with traverse upper cross cylinder, and with upper level
The upper horizontal pin of the piston rod outer end connection of oil cylinder；Standard section of tower crane is equipped with bolt card slot, can be inserted into horizontal pin up and down
The horizontal pin of device；
Jacking hydraulic system includes jacking hydraulic synchronization pumping plant, proportion directional valve group；Proportion directional valve group includes a ratio side
To valve, two electromagnet cut off valve, two pressure sensors；In two working chamber, that is, rodless cavities of proportional direction valve and jacking cylinder
An electromagnet cut off valve and a pressure sensor are respectively provided on the pipeline connected with rod chamber；There are four logical for proportional direction valve
Mouthful, i.e. P mouthfuls, A mouthfuls, B mouthfuls, T mouthfuls；Jacking hydraulic synchronization pumping plant include fuel tank, hydraulic pump and motor, in-line filter, check valve,
Electromagnetic relief valve, return filter, circulating pump and motor, cooler；Fuel tank is connect with hydraulic pump；Hydraulic pump oil outlet passes through all the way
Oil inlet, that is, P mouthfuls of connection of in-line filter, check valve and proportional direction valve, another way is through electromagnetic relief valve, return filter
It is connect with fuel tank；The A mouths of proportional direction valve, B mouthfuls it is hydraulic fluid port AO mouthfuls, BO mouthfuls corresponding with the rodless cavity of jacking cylinder, rod chamber respectively
Connection；Oil outlet, that is, T mouthfuls of proportional direction valve is connect through return filter with fuel tank；It is equipped at the piston rod of jacking cylinder
Displacement sensor；
Console is equipped with the touch screen of input/output；PLC controller is installed in console, be also equipped in console with
The servo motion controller of PLC controller connection；Two pressure sensors are directly connect with PLC controller；Displacement sensor is logical
Servo motion controller is crossed to connect with PLC controller；Proportional direction valve, electromagnet cut off valve and the PLC of jacking hydraulic system are controlled
Device connects；The differential pressure data for two working chambers of jacking cylinder that PLC controller can be fed back according to two pressure sensors, passes through
Proportional direction valve, electromagnet cut off valve action are controlled, realizes the control to preloaded force；PLC controller can be according to displacement sensor
The displacement data of the jacking cylinder piston rod of feedback carries out PID calculating by servo motion controller, and is corresponded to by controlling
Proportional direction valve valve core opening size, realize and the piston rod position of corresponding jacking cylinder, the accurate of jacking speed closed
Ring controls.
2. being used for the raised high-precision hydraulic synchronous jacking system of large-scale tower crane supernumerary segment as described in claim 1, feature exists
In proportion directional valve group further includes accumulator, accumulator ball valve, valve block；A valve block i.e. oil path block controls hydraulic working oil,
Proportional direction valve, accumulator, accumulator ball valve, pressure sensor, electromagnet cut off valve are arranged in valve block；Accumulator passes through storage
Energy device ball valve is connect with proportional direction valve oil inlet, the pulsation damping for absorbing hydraulic pump and mitigation impact.
3. being used for the raised high-precision hydraulic synchronous jacking system of large-scale tower crane supernumerary segment as described in claim 1, feature exists
In the electromagnet cut off valve is the normally closed type electromagnet cut off valve of emergency cut-off when opening, powering off when being powered；Electromagnet cut off valve is powered
When open, emergency cut-off when power-off；When proportion directional valve events, electromagnet cut off valve is opened, system regular event；When ratio side
To when valve stopping action or system fault, power-off, electromagnet cut off valve is closed immediately, locking jacking cylinder position.
4. being used for the raised high-precision hydraulic synchronous jacking system of large-scale tower crane supernumerary segment as described in claim 1, feature exists
In jacking cylinder one end is flange arrangement, referred to as flange end；The other end is ear-ring structure, referred to as earrings end；Flange end is pacified
Loaded on lower load platform, earrings end is connect with upper load platform；Jacking cylinder is divided into four groups, and every group has two jacking cylinders；
The earrings end rigid connection of every group of two jacking cylinders；A displacement sensor is arranged in every group of jacking cylinder, in real time detection feedback
The displacement overhang of every group of jacking cylinder piston rod.
5. being used for the raised high-precision hydraulic synchronous jacking system of large-scale tower crane supernumerary segment as described in claim 1, feature exists
In horizontal hydraulic pressure system includes fuel tank, gear hydraulic pump and motor, overflow valve, two-position four-way solenoid valve, four 3-position 4-way electricity
Magnetic reversal valve, check valve, pressure gauge, oil absorption filter, return filter；Three-position four-way electromagnetic directional valve has there are four port,
That is P mouthfuls, A mouthfuls, B mouthfuls, T mouthfuls；Fuel tank is connect with gear hydraulic pump；Gear hydraulic pump oil outlet is after check valve, pressure gauge, and one
Road is connected through two-position four-way solenoid valve, return filter and fuel tank, and another way is connected to four 3-position 4-way electromagnetism through overflow valve
Oil inlet, that is, P mouthfuls of reversal valve；The A mouths of three-position four-way electromagnetic directional valve, B mouthfuls respectively with two working chamber, that is, nothings of cross cylinder
Rod cavity, rod chamber correspond to hydraulic fluid port connection；Oil outlet, that is, T mouthfuls of three-position four-way electromagnetic directional valve connects through return filter and fuel tank
It connects；Four three-position four-way electromagnetic directional valves are connect with PLC controller, and PLC controller can be by controlling 3-position 4-way electromagnetic switch
Valve events, realize horizontal pin into and out；It is equipped with close to switch in the piston rod near outer ends of cross cylinder, this is close
Switch is connect with PLC controller；PLC controller can be inserted into the bolt on tower crane tower body according to the horizontal pin close to switch feedback
The insertion situation information of card slot determines whether that jacking cylinder synchronizes jacking action.
6. being used for the raised high-precision hydraulic synchronous jacking system of large-scale tower crane supernumerary segment as described in claim 1, feature exists
In, two-position four-way solenoid valve tool there are four port, i.e. P mouthfuls, A mouthfuls, B mouthfuls, T mouthfuls；When gear hydraulic pump is switched on, two-position four-way electromagnetism
The electromagnet of valve not it is electric, two-position four-way solenoid valve is in the positions P-B, and the P imports of two-position four-way solenoid valve and the outlets B communicate,
The fluid exported from gear hydraulic pump oil outlet, after check valve, fluid enters from the P imports of two-position four-way solenoid valve, B
Outlet comes out, and fuel tank, gear hydraulic pumping plant off-load are returned to by return filter；When cross cylinder works, two-position four-way electromagnetism
The electromagnet of valve obtains electric, and two-position four-way solenoid valve is in the positions P-A, and the A mouths of two-position four-way solenoid valve are obstructed, from gear hydraulic pump
The fluid of oil outlet output, after check valve, fluid enters horizontal oil by overflow valve, three-position four-way electromagnetic directional valve
Cylinder establishes pressure in cross cylinder.
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| CN201820519328.8U CN208087096U (en) | 2018-04-12 | 2018-04-12 | One kind being used for the raised high-precision hydraulic synchronous jacking system of large-scale tower crane supernumerary segment |
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| CN201820519328.8U CN208087096U (en) | 2018-04-12 | 2018-04-12 | One kind being used for the raised high-precision hydraulic synchronous jacking system of large-scale tower crane supernumerary segment |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108569631A (en) * | 2018-04-12 | 2018-09-25 | 上海耐斯特液压设备有限公司 | Method is increased for the raised high-precision hydraulic synchronization system of large-scale tower crane supernumerary segment and jacking control method and supernumerary segment |
| CN112797039A (en) * | 2020-12-31 | 2021-05-14 | 中南钻石有限公司 | Return cavity pressing device of cubic apparatus press and defective plunger guide sleeve screening method |
| CN113955653A (en) * | 2021-10-11 | 2022-01-21 | 中联重科建筑机械(江苏)有限责任公司 | Self-climbing tower crane and multi-cylinder jacking system thereof |
| CN114453885A (en) * | 2022-03-21 | 2022-05-10 | 东方电气集团东方电机有限公司 | Suspended flexible preassembling device and method for water guide mechanism of water pump turbine |
| CN115744670A (en) * | 2022-11-30 | 2023-03-07 | 徐州圣淮机械有限公司 | Anti-falling mechanism for jacking cross beam of tower crane |
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2018
- 2018-04-12 CN CN201820519328.8U patent/CN208087096U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108569631A (en) * | 2018-04-12 | 2018-09-25 | 上海耐斯特液压设备有限公司 | Method is increased for the raised high-precision hydraulic synchronization system of large-scale tower crane supernumerary segment and jacking control method and supernumerary segment |
| CN108569631B (en) * | 2018-04-12 | 2024-01-23 | 上海耐斯特液压设备有限公司 | High-precision hydraulic synchronization system for large tower crane joint lifting and control method |
| CN112797039A (en) * | 2020-12-31 | 2021-05-14 | 中南钻石有限公司 | Return cavity pressing device of cubic apparatus press and defective plunger guide sleeve screening method |
| CN112797039B (en) * | 2020-12-31 | 2023-02-17 | 中南钻石有限公司 | Return cavity pressing device of cubic apparatus press and defective plunger guide sleeve screening method |
| CN113955653A (en) * | 2021-10-11 | 2022-01-21 | 中联重科建筑机械(江苏)有限责任公司 | Self-climbing tower crane and multi-cylinder jacking system thereof |
| CN114453885A (en) * | 2022-03-21 | 2022-05-10 | 东方电气集团东方电机有限公司 | Suspended flexible preassembling device and method for water guide mechanism of water pump turbine |
| CN115744670A (en) * | 2022-11-30 | 2023-03-07 | 徐州圣淮机械有限公司 | Anti-falling mechanism for jacking cross beam of tower crane |
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