CN103088757B - Box girder pre-stressed tension automatic control method and system - Google Patents
Box girder pre-stressed tension automatic control method and system Download PDFInfo
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- CN103088757B CN103088757B CN201310047191.2A CN201310047191A CN103088757B CN 103088757 B CN103088757 B CN 103088757B CN 201310047191 A CN201310047191 A CN 201310047191A CN 103088757 B CN103088757 B CN 103088757B
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Abstract
The invention discloses a kind of box girder pre-stressed tension automatic control method and system, described method comprises: arrange by the opinion drawing device of main controller controls and the auxiliary tensioning equipment that controlled by assistant controller respectively at the two ends of case beam; Advocate described in main controller controls that drawing device carries out stretch-draw, and carry out stretch-draw via the described auxiliary tensioning equipment of assistant controller control; During stretch-draw, master controller or assistant controller are according to advocating that the opinion of drawing device draws the auxiliary stretch-draw displacement of displacement and auxiliary tensioning equipment, regulate the stretching force of advocating drawing device and/or auxiliary tensioning equipment, make described opinion drawing device carry out stretch-draw according to identical stretch-draw progress to case beam with auxiliary tensioning equipment.The present invention can make opinion drawing device carry out stretch-draw according to identical stretch-draw progress to case beam with auxiliary tensioning equipment.
Description
Technical field
The present invention relates to bridge technology field, the box girder pre-stressed tension automatic control method that particularly a kind of railway is special and system.
Background technology
Prestressed stretch-draw, be the critical construction technology of bridge, according to existing job specfication requirement, in construction, adopt the two ends stretch-draw of same duct, the symmetrical stretch-draw in two ducts, 2011 editions " highway bridge and culvert construction technique normalizing " 7.12.2 the 2nd section of regulation " precision of stretching force proof stress be preferably ± 1.5% ".At present, in domestic prestressing stretching technique field, major part still adopts manual stretch-draw, the construction method of artificial counting, there is following shortcoming in manual stretch-draw: needs 4 tacit agreements of the staff through professional training to coordinate during manual stretch-draw, cannot implement to follow the tracks of for the situation of change of duct frictional resistance in stretching process, the tracking of 4 setting activitiess is depended on completely to the naked eyes reading of constructor, hand-kept, when stretch-draw, the lead close to desired value is difficult to hold, estimation error and overshoot error cannot be avoided, the phenomenon of pressure overshoot when often occurring reaching 100% whole stretch-draw value, etc..
And in order to overcome manual operation, the operation visually observed on the subjectivity and objectivity that brings with artificial judgment mode, observation and misjudgment, the present inventor is in the utility model patent of " CN201801815U " in China Patent No., disclose the tensioning system that a kind of name is called " the special box girder pre-stressed prestressed numerical control intelligent tensioning system of railway passenger ", it is by being separately positioned on the main stretch-draw jack at beam two ends, main hydraulic control system, master control system and auxiliary stretch-draw jack, auxiliary hydraulic control system, carrying out prestressed stretch-draw from control system to beam.By this cover tensioning system, the timely preservation of automatically controlled, the tension data of stretching process can be realized.But, because this cover tensioning system must arrange master and slave tensioning system respectively at the two ends of the beam carrying out prestressed stretch-draw, and in existing model machine, once attempted adopting many kinds of liquid pressure control system to control stretch-draw, but all can not make the stretch-draw displacement Complete Synchronization of master and slave tensioning system during whole stretch-draw, therefore result of use all fails to meet existing stretch-draw code requirement; And existing model machine poor stability in construction testing, fault rate is high, can not adapt to the requirement of open field operation.Therefore up to the present, this cover tensioning system can not really come into operation.
Summary of the invention
The object of this invention is to provide a kind of box girder pre-stressed tension automatic control method solved the problems of the technologies described above.
Another object of the present invention is to provide a kind of box girder pre-stressed automatic stretching control system solved the problems of the technologies described above.
According to a first aspect of the present invention, provide a kind of box girder pre-stressed tension automatic control method, comprise the steps:
Arrange by the opinion drawing device of main controller controls and the auxiliary tensioning equipment that controlled by assistant controller respectively at the two ends of case beam;
Advocate described in main controller controls that drawing device carries out stretch-draw, and carry out stretch-draw via the described auxiliary tensioning equipment of assistant controller control;
During stretch-draw, master controller or assistant controller are according to advocating that the opinion of drawing device draws the auxiliary stretch-draw displacement of displacement and auxiliary tensioning equipment, regulate the stretching force of advocating drawing device and/or auxiliary tensioning equipment, make described opinion drawing device carry out stretch-draw according to identical stretch-draw progress to case beam with auxiliary tensioning equipment.
Preferably, described adjustment advocates that the stretching force of drawing device and/or auxiliary tensioning equipment comprises:
Determine that described opinion draws the offset deviation of displacement and described auxiliary stretch-draw displacement;
According to described offset deviation, the stretching force of drawing device and/or auxiliary tensioning equipment is advocated in adjustment.
Preferably, described adjustment advocates that the stretching force of drawing device and/or auxiliary tensioning equipment comprises:
Determine that described opinion draws the offset deviation of displacement and described auxiliary stretch-draw displacement;
When described opinion draws displacement to be less than described auxiliary stretch-draw displacement, according to described offset deviation, improve the stretching force of described opinion drawing device or reduce auxiliary tensioning equipment stretching force;
When described opinion draws displacement to be greater than described auxiliary stretch-draw displacement, according to described offset deviation, reduce the stretching force of described opinion drawing device or improve auxiliary tensioning equipment stretching force.
Preferably, described adjustment advocates that the stretching force of drawing device and/or auxiliary tensioning equipment comprises:
Determine that described opinion draws the first velocity of displacement deviation of velocity of displacement and velocity of displacement threshold value;
Determine the second displacement velocity deviation of described auxiliary stretch-draw velocity of displacement and velocity of displacement threshold value;
According to described second displacement velocity deviation and the second displacement velocity deviation, adjust described opinion drawing device stretching force and auxiliary tensioning equipment stretching force respectively.
Preferably, described opinion drawing device and auxiliary tensioning equipment comprise hydraulic control system and stretch-draw oil top respectively, and detect respective stretch-draw pressure by the oil pressure detecting described hydraulic control system.
Preferably, hydraulic control system is by continuous flow regulation, and the stretching force on the stretch-draw avoiding flow drastic change to bring oil top suddenlys change.
Preferably, master controller or assistant controller are according to respective oil pressure and stretch-draw displacement, and the servomotor controlling respective hydraulic control system respectively performs following operation:
When described oil pressure is less than oil pressure map value, controls servomotor rotating speed and improve gradually, drive radial plunger pump to push up to stretch-draw oil the oil pressure providing pressure to increase gradually;
When described oil pressure equals described oil pressure map value, control servomotor and enter the pressurize operational phase, make described stretch-draw oil top be in load and maintain state;
After packing stage terminates, the oil pressure on stretch-draw oil top described in slow releasing.
Preferably, the operation controlling servomotor execution also comprises:
When described stretch-draw oil top oil pressure reduces to 0, control described servomotor and drive radial plunger pump to provide to stretch-draw oil top the oil pressure making its return with fixed rotating speed;
When stretch-draw displacement arrives the home position preset, control described servomotor out of service, and make the top drain charge of described stretch-draw oil.
Preferably, in the described pressurize operational phase, when detecting that stretch-draw velocity of displacement accelerates, or when oil pressure being detected close to setting value, control servomotor reduce its rotating speed so that realize stretch-draw oil top displacement and pressure steadily regulate.
According to a second aspect of the invention, provide a kind of box girder pre-stressed automatic stretching control system, comprising:
Be arranged on the opinion drawing device of case beam one end;
Be arranged on the auxiliary tensioning equipment of the case beam other end;
Control the master controller of described opinion drawing device;
Control the assistant controller of described auxiliary tensioning equipment;
Wherein, described in main controller controls, advocate that drawing device carries out stretch-draw, and carry out stretch-draw via the described auxiliary tensioning equipment of assistant controller control;
Also comprise: stretch-draw sychronisation, for drawing displacement and auxiliary stretch-draw displacement according to opinion, generating for regulating the instruction of advocating drawing device and/or auxiliary tensioning equipment stretching force, making described opinion drawing device carry out stretch-draw according to identical stretch-draw progress to case beam with auxiliary tensioning equipment.
Preferably, described stretch-draw sychronisation:
Being used for more described opinion draws the comparison module of displacement and described auxiliary stretch-draw displacement, for obtaining comparative result;
Generating the adjustment module of regulating command according to described comparative result, regulating its stretching force for making opinion drawing device and/or auxiliary tensioning equipment according to described regulating command.
Preferably, described opinion drawing device and auxiliary tensioning equipment comprise respectively:
Stretch-draw oil top;
Connect the hydraulic control system on described stretch-draw oil top;
Be used for detecting the oil pressure sensor of oil pressure in hydraulic control system;
Wherein, during the stretch-draw on described stretch-draw oil top, hydraulic control system passes through continuous flow regulation, the stretching force sudden change on the stretch-draw avoiding flow drastic change to bring oil top.
Preferably, hydraulic system comprises:
The servomotor that the rotating speed connecting described master controller can regulate continuously;
Connect the radial plunger pump of described servomotor;
Be connected to the 3rd solenoid operated directional valve between described radial plunger pump and the oily rodless cavity pushed up of stretch-draw;
Connect the 4th solenoid operated directional valve between the rodless cavity on described stretch-draw oil top and fuel tank;
Wherein, when oil pressure is less than oil pressure map value, controls servomotor rotating speed and improve gradually, drive radial plunger pump to push up to stretch-draw oil the oil pressure providing pressure to increase gradually via described 3rd solenoid operated directional valve;
When described oil pressure equals described oil pressure map value, control servomotor and enter the pressurize operational phase, make described stretch-draw oil top be in load and maintain state;
After packing stage terminates, via the oil pressure on stretch-draw oil top described in the 4th solenoid operated directional valve slow releasing.
Preferably, described hydraulic system comprises: connect described the first solenoid operated directional valve between radial plunger pump and the oily rod chamber pushed up of stretch-draw; Wherein, when described stretch-draw oil top oil pressure reduces to zero, described servomotor drives radial plunger pump to provide to stretch-draw oil top the oil pressure making it reset via the first solenoid operated directional valve with fixed rotating speed; Further, when stretch-draw displacement arrives the home position preset, control described servomotor out of service, and make the top drain charge of described stretch-draw oil.
Relative to prior art, technique effect of the present invention is: opinion drawing device (stretch-draw oil top) can be made to carry out stretch-draw according to identical operation process to case beam with auxiliary tensioning equipment (stretch-draw oil top); Hydraulic system adopts servo-pump control mode, can give full play to the continuously adjustable feature of pump flow control amount, the stretching force sudden change avoiding flow sharply to change bringing.
Below in conjunction with accompanying drawing, the present invention is described in detail.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the box girder pre-stressed stretch-draw automatic Tensioning system that the present invention adopts;
Fig. 2 is the first embodiment schematic diagram that the stretch-draw sychronisation of box girder pre-stressed automatic stretching control system of the present invention arranges in the host controller;
Fig. 3 is the second embodiment schematic diagram that the stretch-draw sychronisation of box girder pre-stressed automatic stretching control system of the present invention arranges in the host controller;
Fig. 4 is the 3rd embodiment schematic diagram that the stretch-draw sychronisation of box girder pre-stressed automatic stretching control system of the present invention arranges in the host controller;
Fig. 5 is the embodiment schematic diagram that the stretch-draw sychronisation of box girder pre-stressed automatic stretching control system of the present invention is arranged in assistant controller;
Fig. 6 is the schematic diagram that display the present invention advocates the structure of drawing device or auxiliary tensioning equipment;
Fig. 7 shows master controller of the present invention or assistant controller connection opinion drawing device or the auxiliary tensioning equipment schematic diagram about electrical equipment;
Fig. 8 is the schematic diagram of box girder pre-stressed tension automatic control method of the present invention;
Fig. 9 is the schematic diagram of the structure of box girder pre-stressed automatic stretching control system of the present invention;
Figure 10 is the left side view of the box girder pre-stressed automatic stretching control system shown in Fig. 9.
Detailed description of the invention
Fig. 1 shows box girder pre-stressed automatic stretching control system of the present invention, comprising: the opinion drawing device being arranged on case beam one end; Be arranged on the auxiliary tensioning equipment of the case beam other end; Control the master controller of described opinion drawing device; Control the assistant controller of described auxiliary tensioning equipment; Wherein, master controller draws the auxiliary stretch-draw pressure of displacement and auxiliary tensioning equipment and auxiliary stretch-draw displacement according to the opinion pressure of the opinion drawing device detected in real time with advocating, control described opinion drawing device and carry out stretch-draw, and carry out stretch-draw via the described auxiliary tensioning equipment of assistant controller control;
Box girder pre-stressed stretch-draw automatic Tensioning system of the present invention also comprises stretch-draw sychronisation (not shown), for drawing displacement and auxiliary stretch-draw displacement according to opinion, generating for regulating the instruction of advocating drawing device and/or auxiliary tensioning equipment stretching force, making described opinion drawing device carry out stretch-draw according to identical stretch-draw progress to case beam with auxiliary tensioning equipment.Wherein, stretching force regulating command generating apparatus can be arranged in described master controller, or is arranged in assistant controller.
The present inventor finds through further investigation on the basis of lot of experiments, the master and slave tensioning system of prior art starts to carry out stretch-draw simultaneously can not ensure that both carry out stretch-draw according to identical stretch-draw progress to case beam, because the intensity at case beam two ends incomplete same.The present invention advocates the stretch-draw displacement of drawing device and auxiliary tensioning equipment by real-time tracking, and according to both offset deviations, opinion drawing device and/or auxiliary tensioning equipment stretching force are adjusted, opinion drawing device is made to carry out stretch-draw (namely according to identical stretch-draw progress to case beam with auxiliary tensioning equipment, make both stretch-draw displacements identical), thus solve the technical problem that above-mentioned prior art exists.
Fig. 2 shows the present invention and stretch-draw sychronisation is arranged on the first embodiment in master controller, and as shown in Figure 2, this stretch-draw sychronisation comprises: being used for more described opinion draws the comparison module of displacement and described auxiliary stretch-draw displacement, for obtaining comparative result; Generating the adjustment module of regulating command according to described comparative result, regulating its stretching force for making opinion drawing device and/or auxiliary tensioning equipment according to this regulating command.
Fig. 3 shows the present invention and stretch-draw sychronisation is arranged on the second embodiment in master controller, and as shown in Figure 3, this stretch-draw sychronisation comprises: determine that described opinion draws the first determination module of the first velocity of displacement deviation of velocity of displacement and velocity of displacement threshold value; Determine the second determination module of the second displacement velocity deviation of described auxiliary stretch-draw velocity of displacement and velocity of displacement threshold value; According to described second displacement velocity deviation and the second displacement velocity deviation, generate the adjustment module of the instruction of the described opinion drawing device stretching force of adjustment and auxiliary tensioning equipment stretching force respectively.
Fig. 4 shows the present invention and stretch-draw sychronisation is arranged on the 3rd embodiment in master controller, as shown in Figure 4, stretch-draw operation regulating command generating apparatus comprises: being used for more described opinion draws the comparison module of displacement and described auxiliary stretch-draw displacement, for obtaining comparative result; Generating the adjustment module of regulating command according to described comparative result, regulating its stretching force for making opinion drawing device according to this instruction.
This embodiment, based on auxiliary stretch-draw displacement, regulates the displacement of advocating drawing device.By opinion being drawn displacement and auxiliary stretch-draw displacement to compare, obtain offset deviation.When advocating to draw displacement to be less than described auxiliary stretch-draw displacement, according to offset deviation, improve the stretching force of advocating drawing device; When advocating to draw displacement to be greater than auxiliary stretch-draw displacement, according to offset deviation, reduce the stretching force of described opinion drawing device.
Fig. 5 shows the present invention and stretch-draw sychronisation is arranged on embodiment in assistant controller, and this stretch-draw sychronisation comprises: being used for more described opinion draws the comparison module of displacement and described auxiliary stretch-draw displacement, for obtaining comparative result; Generating the adjustment module of regulating command according to described comparative result, regulating its stretching force for making auxiliary tensioning equipment according to this instruction.
This embodiment, to advocate to draw based on displacement, regulates the displacement of auxiliary tensioning equipment.By opinion being drawn displacement and auxiliary stretch-draw displacement to compare, obtain offset deviation.When auxiliary stretch-draw displacement be less than opinion draw displacement time, according to offset deviation, improve the stretching force of auxiliary tensioning equipment; When auxiliary stretch-draw displacement be greater than opinion draw displacement time, according to offset deviation, reduce the stretching force of auxiliary tensioning equipment.
Fig. 6 shows the structure of opinion drawing device of the present invention and auxiliary tensioning equipment, as shown in Figure 6, advocates that drawing device and auxiliary tensioning equipment comprise respectively: stretch-draw oil top 11; Connect the hydraulic control system on described stretch-draw oil top 11; Be used for detecting the oil pressure sensor 13 of oil pressure in hydraulic control system; And, be used for detecting the displacement transducer 12 of tensioning equipment displacement.Wherein, during the stretch-draw on stretch-draw oil top, hydraulic control system passes through continuous flow regulation, the stretching force sudden change on the stretch-draw avoiding flow drastic change to bring oil top.
The present inventor finds through further investigation on the basis of lot of experiments, the main cause that conventional hydraulic is not suitable with automatic Tensioning is: in stretch-draw overall process, its output flow regulates and adopts size pump mode, output flow can be made to increase rapidly causes flow sharply to change, thus cause stretching force to suddenly change, the performance that the present invention utilizes servomotor rotating speed adjustable, hydraulic control flow system flow regulates continuously, thus the stretching force sudden change on the stretch-draw avoiding flow drastic change to bring oil top.
As shown in Figure 6, hydraulic system comprises:
The servomotor 9 that the rotating speed connecting master controller can regulate continuously;
Connect the radial plunger pump 10 of servomotor 9;
Be connected to the 3rd solenoid operated directional valve 15 between radial plunger pump 10 and the oily rodless cavity pushing up 11 of stretch-draw;
Connect the 4th solenoid operated directional valve 16 between the rodless cavity on stretch-draw oil top 11 and fuel tank 7.
Wherein, when oil pressure is less than oil pressure map value, controls servomotor rotating speed and improve gradually, drive radial plunger pump to push up to stretch-draw oil the oil pressure providing pressure to increase gradually via described 3rd solenoid operated directional valve 15; When described oil pressure equals described oil pressure map value, control servomotor and enter the pressurize operational phase, make described stretch-draw oil top be in load and maintain state; After packing stage terminates, via the oil pressure on stretch-draw oil top described in the 4th solenoid operated directional valve 16 slow releasing.
As shown in Figure 6, hydraulic system of the present invention also comprises: be connected to the first solenoid operated directional valve 3 between radial plunger pump 10 and the oily rod chamber pushed up of stretch-draw, and be connected to the safety valve 4 between oil top rod chamber and fuel tank; Wherein, when stretch-draw oil top oil pressure reduces to zero, described servomotor drives radial plunger pump to provide to stretch-draw oil top the oil pressure making it reset via the first solenoid operated directional valve 3 with fixed rotating speed; Further, when stretch-draw displacement arrives the home position preset, control described servomotor out of service, safety valve 4 defines oil top rod chamber maximum pressure, and Accident prevention occurs.
Second solenoid operated directional valve 14 is unloaders of whole system, is the carrying out safety backup of whole system, and when due to chance failure, when motor cannot shut down, the second solenoid operated directional valve 14 energising can make whole system pressure make zero.Damaging property of Accident prevention consequence.
Fig. 7 shows the schematic diagram of master controller of the present invention or assistant controller control opinion drawing device or auxiliary tensioning equipment, and as shown in Figure 7, displacement transducer 12 is electrically connected controller, for displacement detection signal being sent to controller; Oil pressure sensor 13 is electrically connected controller, for oil pressure detection signal is sent to controller; Controller connects the electromagnet of the 3rd solenoid operated directional valve 15, second solenoid operated directional valve 14, first solenoid operated directional valve 3 and the 4th solenoid operated directional valve 16 respectively, so that in the different phase of stretch-draw, controls its commutation.
Fig. 8 shows the box girder pre-stressed tension automatic control method of one of the present invention, and as shown in Figure 8, the method comprises:
Arrange by the opinion drawing device of main controller controls and the auxiliary tensioning equipment that controlled by assistant controller respectively at the two ends of case beam;
Master controller draws the auxiliary stretch-draw pressure of displacement and auxiliary tensioning equipment and auxiliary stretch-draw displacement according to the opinion pressure of the opinion drawing device detected in real time with advocating, control described opinion drawing device and carry out stretch-draw, and carry out stretch-draw via the described auxiliary tensioning equipment of assistant controller control;
During stretch-draw, master controller or assistant controller according to opinion draw displacement and auxiliary stretch-draw displacement, regulate the stretching force of advocating drawing device and/or auxiliary tensioning equipment, make described opinion drawing device carry out stretch-draw according to identical stretch-draw progress to case beam with auxiliary tensioning equipment.
Adjustment advocates that the stretching force of drawing device and/or auxiliary tensioning equipment comprises: determine that described opinion draws the offset deviation of displacement and described auxiliary stretch-draw displacement; According to described offset deviation, the stretching force of drawing device and/or auxiliary tensioning equipment is advocated in adjustment.
As an example, adjustment advocates that the stretching force of drawing device and/or auxiliary tensioning equipment comprises: determine that described opinion draws the offset deviation of displacement and described auxiliary stretch-draw displacement; When described opinion draws displacement to be less than described auxiliary stretch-draw displacement, according to described offset deviation, improve the stretching force of described opinion drawing device or reduce auxiliary tensioning equipment stretching force; When described opinion draws displacement to be greater than described auxiliary stretch-draw displacement, according to described offset deviation, reduce the stretching force of described opinion drawing device or improve auxiliary tensioning equipment stretching force.
As another example, adjustment of the present invention advocates that the stretching force of drawing device and/or auxiliary tensioning equipment comprises: determine that described opinion draws the first velocity of displacement deviation of velocity of displacement and velocity of displacement threshold value; Determine the second displacement velocity deviation of described auxiliary stretch-draw velocity of displacement and velocity of displacement threshold value; According to described second displacement velocity deviation and the second displacement velocity deviation, adjust described opinion drawing device stretching force and auxiliary tensioning equipment stretching force respectively.
In addition, advocate that drawing device and auxiliary tensioning equipment comprise hydraulic control system and stretch-draw oil top respectively, and detect respective stretch-draw pressure by the oil pressure detecting described hydraulic control system.
During the stretch-draw on described stretch-draw oil top, hydraulic control system passes through continuous flow regulation, the stretching force sudden change on the stretch-draw avoiding flow drastic change to bring oil top.
In addition, master controller or assistant controller are according to respective oil pressure and stretch-draw displacement, and the servomotor controlling respective hydraulic control system respectively performs following operation:
When described oil pressure is less than oil pressure map value, controls servomotor rotating speed and improve gradually, drive radial plunger pump to push up to stretch-draw oil the oil pressure providing pressure to increase gradually;
When described oil pressure equals described oil pressure map value, control servomotor and enter the pressurize operational phase, make described stretch-draw oil top be in load and maintain state;
After packing stage terminates, the oil pressure on stretch-draw oil top described in slow releasing;
When described stretch-draw oil top oil pressure reduces to zero, control described servomotor and drive radial plunger pump to provide to stretch-draw oil top the oil pressure making its return with fixed rotating speed;
When stretch-draw displacement arrives the home position preset, control described servomotor out of service, and make the top drain charge of described stretch-draw oil.
In addition, in the described pressurize operational phase, when detecting that stretch-draw velocity of displacement accelerates, or when oil pressure being detected close to setting value, control servomotor reduce its rotating speed so that realize stretch-draw oil top displacement and pressure steadily regulate.
Below, composition graphs 7 and Fig. 8, control to be described in detail to box girder pre-stressed stretch-draw of the present invention automatically.
Servomotor 9(namely, servomotor) drive radial plunger pump 10 to work, start to provide hydraulic oil to pump control servo-drive system, hydraulic oil flows to one way valve 2, now one way valve forward conduction, and high-pressure overflow valve 1 defines security of system pressure.During stretch-draw, leak the 3rd solenoid operated directional valve 15 electromagnet energising for 23 logical 0, other electromagnet power-off hydraulic oil flows through 23 logical 0 and leaks the rodless cavity hydraulic fluid port that the 3rd solenoid operated directional valve 15 flows to stretch-draw oil top 11, now pressure sensor 13 acquisition stream to stretch-draw oil top hydraulic fluid pressure and fed back to box girder pre-stressed automatic stretching control system, displacement transducer gathers the real-time displacement on oil top, and feed back to box girder pre-stressed automatic stretching control system, box girder pre-stressed automatic stretching control system is according to the pressure received, Displacement Feedback signal, the rotating speed of automatic adjustment servomotor, the range of speeds turns stepless time adjustment in scope at 0-1450/MIN.When in oil circuit, the pressure of hydraulic oil does not exceed setting value, servomotor 9 drives radial plunger pump 10 to work always; When the hydraulic oil pressure force value that pressure sensor 13 collects reaches setting value, servomotor quits work, and now pump control servo-drive system enters packing stage, and pressure reduces, servomotor 9 drives radial plunger pump 10 to work, ftercompction.Stretch-draw and packing stage, the rotating speed of servomotor 9 is regulated according to the pid program preset automatically by box girder pre-stressed automatic stretching control system, movement velocity when oil top accelerates, oil top rodless cavity pressure is close to setting value, pid program reduces servomotor 9 rotating speed automatically, and top 11 displacements of realization oil, pressure steadily regulate.
Hold lotus to terminate rear servomotor 9 and stop operating, 23 logical 0 leak the 4th solenoid operated directional valve 16 electromagnet energising, and in oil top 11, pressure leaks the supporting damping hole slow releasing of the 4th solenoid operated directional valve 16 by 23 logical 0.Complete anchoring action.
Oil top 11 pressure reduce to 0 after, leak the 3rd solenoid operated directional valve 15 and 23 logical 0 leakage the 4th solenoid operated directional valve 16 electromagnet power-off for 23 logical 0, leak the first solenoid operated directional valve 3 electromagnet energising for 23 logical 0, servomotor 9 drives radial plunger pump 10 to work with fixed rotating speed, hydraulic oil leaks the first solenoid operated directional valve 3 through 23 logical 0 and enters oil top 11 rod chambers, the hydraulic oil of oil top 11 rodless cavities leaks the 3rd solenoid operated directional valve 15 through 23 logical 0 and returns fuel tank, and oil top is regained.No. 4 safety valves limit oil top rod chamber maximum pressure, protection oil top.
When displacement transducer 12 value of feedback reaches default home position, servomotor stops operating, and 23 logical 0 leak the second solenoid operated directional valve 14 electromagnet energising drain charge.
Return filter 5 filtering appts returns the impurity in fluid when running.
Clear air when air filter 6 maintenance medium force feed outflow fuel tank, inflow fuel tank.
Oil ga(u)ge 7 intuitively shows hydraulic oil liquid level in fuel tank.
Heater 8, when hydraulic fluid temperature is lower than 10 degree, manually boots, to hydraulic oil heating, and the rational working oil temperature of maintenance medium force feed.
Fig. 9 and Figure 10 shows the structure of box girder pre-stressed automatic stretching control system of the present invention, as shown in Figure 9 and Figure 10, box girder pre-stressed automatic stretching control system of the present invention comprises the tensioning equipment at least one duct in multiple ducts of case beam being carried out to stretch-draw, and this tensioning equipment comprises: walking carriage 21; Be placed in the pumping plant protective cover 23 on walking carriage 21; Be placed in the control device 22 with box girder tensioning parameter input module in pumping plant protective cover 23, the box girder tensioning parameter of input is converted into corresponding control signal by it; Be placed in the servo hydraulic system 24 with radial plunger pump 10 in pumping plant protective cover 23, it controls the rotating speed of radial plunger pump 10 according to the control signal that control device 22 exports, thus controls the output flow of servo hydraulic system 24 oil circuit; The oil top 11,11, two, two oil tops being placed in two ends, each duct connects servo hydraulic system 24 respectively, and according to the output flow that servo hydraulic system 24 exports, carries out stretch-draw to each duct of case beam simultaneously.
Specifically, tensioning equipment of the present invention can carry out stretch-draw to the two ends at least one duct in multiple ducts of case beam simultaneously, thus the stretching force at two ends, a case beam duct is balanced, the stretch-draw precision of effective guard box beam.One of basic building block of this tensioning equipment is walking carriage, is provided with four road wheels under its vehicle frame, therefore can walk under the driving of artificial or power set.This walking carriage is mounted with pumping plant protective cover, and control tensioning equipment and be placed in this pumping plant protective cover to the control device that stretch-draw is carried out in the duct of case beam, being provided with in it can by the input module of box girder tensioning parameters input, and inputted box girder tensioning parameter is converted into corresponding control signal, then control signal is passed to the servo hydraulic system be placed in equally in pumping plant protective cover, this servo hydraulic system has the radial plunger pump driven by servomotor 9, after it receives the control signal exported by control device, the rotating speed of radial plunger pump is controlled by the rotating speed controlling servomotor, thus control the output flow of radial plunger pump, and then control the output flow of servo hydraulic system oil circuit, and two the oil tops being placed in two ends, each duct are connected with servo hydraulic system by oil circuit, when the pressure that output flow is changed reaches setup pressure value, stretch-draw action is carried out in the oil top at two ends, each duct simultaneously.
In addition, walking carriage is also provided with four lifting columns 28, rain-proof fluffied 25, oily jacking frame 29, pipeline accepting rack 27 and sound prompt device 26 and pressure meter 30 etc.Wherein, four lifting columns 28 lay respectively at four side angle places of walking carriage, and it are provided with lifting ear, and for when carrying out prestressed stretch-draw to case beam, walking carriage rises and winches to correct position by boom hoisting easy to use; Rain-proof fluffied is installed on the top of lifting column, and it provides protective effect for all devices be placed on walking carriage, thus this tensioning equipment can normally can be worked when bad weather, thus does not affect the duration of construction; Oil jacking frame is installed on one end of walking carriage, oil top can be settled in the inner at the end of construction, thus guarantee to damage oil top, and storing up the damage to pipeline in process to reduce, above oily jacking frame, also pipeline accepting rack is installed, it will construct the storage of the pipeline after terminating wherein, thus enhances the keeping effect to pipeline; Further, the sound prompt device 26 be connected with control device is also installed at pumping plant protective cover upper surface, thus can real-time prompting oil top 11 activities.In addition, also add the power supply indicator with alarm function at pumping plant protective cover upper surface, and be installed on pumping plant protective cover upper surface and the high-precision pressure gauge 30 of putting pressure measurement same with oil pressure sensor.
In addition, between master controller of the present invention and assistant controller, bluetooth is adopted to set up wireless telecommunications, real-time Transmission pressure sensor 13, displacement transducer 12 data, and technological parameter, construction order.Two end communications only exchange a small amount of status data, and control algorithm all carries out in this locality, realize two ends synchronous regime control with the transmission of minimum data.
Wireless way for transmitting two end signal, the wireless mode that can select has 1) wireless router, 2) data radio station, 3) bluetooth communication.
In sum, the present invention has following technique effect:
1) hydraulic system adopts servo-pump control mode, can give full play to the continuously adjustable feature of pump flow control amount, the stretching force sudden change avoiding flow sharply to change bringing.
2) servo-pump control adopts servomotor+constant displacement pump+pressure, Displacement Feedback, forms large closed-loop control system, can provide drive pressure required for load and flow to system.
3) adopt servomotor to drive oil pump, have that electromechanical time constant is little, the linearity is high, rotations is level and smooth, moment is stable.
4) servo-pump control system is without throttling, spill losses, and during system cloud gray model, heating greatly reduces; System heating reduces, and Hydraulic Elements extend application life.Low oil temperature makes the potted component life-span greatly improve.
5) servo-pump control system has good adaptivity, and its pressure exported and flow can be consistent with loading demand, and energy loss greatly reduces, and system effectiveness improves, and energy-saving effect is obvious.
6) servo-pump control output flow according to actual needs, hydraulic oil unit interval utilization rate reduces, and hydraulic oil extends than conventional system service time.
Although be explained in detail the present invention above; but the present invention is not limited thereto; those skilled in the art can principle according to the present invention modify, and therefore, all various amendments carried out according to principle of the present invention all should be understood to fall into protection scope of the present invention.
Claims (9)
1. a box girder pre-stressed tension automatic control method, is characterized in that, comprising:
Arrange by the opinion drawing device of main controller controls and the auxiliary tensioning equipment that controlled by assistant controller respectively at the two ends of case beam;
Advocate described in main controller controls that drawing device carries out stretch-draw, and master controller carries out stretch-draw via the described auxiliary tensioning equipment of assistant controller control;
During stretch-draw, the master controller or the assistant controller that are provided with stretch-draw sychronisation draw the auxiliary stretch-draw displacement of displacement and auxiliary tensioning equipment according to the opinion of opinion drawing device, regulate the stretching force of advocating drawing device and/or auxiliary tensioning equipment, make described opinion drawing device carry out stretch-draw according to identical stretch-draw progress to case beam with auxiliary tensioning equipment;
Wherein, master controller or assistant controller, according to respective oil pressure and stretch-draw displacement, control the servomotor executable operations of respective hydraulic control system respectively, comprising:
At stretch-draw and packing stage, the movement velocity when oil top accelerates, and when oil top rodless cavity pressure is close to setting value, reduces servomotor rotating speed, and the top displacement of realization oil, pressure steadily regulate;
When stretch-draw oil top oil pressure reduces to zero, control described servomotor and drive radial plunger pump to provide to stretch-draw oil top the oil pressure making its return with fixed rotating speed;
When stretch-draw displacement arrives the home position preset, control described servomotor out of service, and make the top drain charge of described stretch-draw oil.
2. method according to claim 1, is characterized in that, described adjustment advocates that the stretching force of drawing device and/or auxiliary tensioning equipment comprises:
Determine that described opinion draws the offset deviation of displacement and described auxiliary stretch-draw displacement;
According to described offset deviation, the stretching force of drawing device and/or auxiliary tensioning equipment is advocated in adjustment.
3. method according to claim 2, is characterized in that, described adjustment advocates that the stretching force of drawing device and/or auxiliary tensioning equipment comprises:
Determine that described opinion draws the offset deviation of displacement and described auxiliary stretch-draw displacement;
When described opinion draws displacement to be less than described auxiliary stretch-draw displacement, according to described offset deviation, improve the stretching force of described opinion drawing device or reduce auxiliary tensioning equipment stretching force;
When described opinion draws displacement to be greater than described auxiliary stretch-draw displacement, according to described offset deviation, reduce the stretching force of described opinion drawing device or improve auxiliary tensioning equipment stretching force.
4. the method according to claim 1 or 2 or 3, is characterized in that, described opinion drawing device and auxiliary tensioning equipment comprise hydraulic control system and stretch-draw oil top respectively, and detect respective stretch-draw pressure by the oil pressure detecting described hydraulic control system.
5. method according to claim 4, is characterized in that, master controller or assistant controller are according to respective oil pressure and stretch-draw displacement, and the operation that the servomotor controlling respective hydraulic control system respectively performs also comprises:
When described oil pressure is less than oil pressure map value, controls servomotor rotating speed and improve gradually, drive radial plunger pump to push up to stretch-draw oil the oil pressure providing pressure to increase gradually;
When described oil pressure equals described oil pressure map value, control servomotor and enter the pressurize operational phase, make described stretch-draw oil top be in load and maintain state;
After packing stage terminates, the oil pressure on stretch-draw oil top described in slow releasing.
6. a box girder pre-stressed automatic stretching control system, is characterized in that, comprising:
Be arranged on the opinion drawing device of case beam one end;
Be arranged on the auxiliary tensioning equipment of the case beam other end;
Control the master controller of described opinion drawing device;
Control the assistant controller of described auxiliary tensioning equipment;
Wherein, described in main controller controls, advocate that drawing device carries out stretch-draw, and master controller carries out stretch-draw via the described auxiliary tensioning equipment of assistant controller control;
Wherein, described master controller or assistant controller are provided with stretch-draw sychronisation, for drawing displacement and auxiliary stretch-draw displacement according to opinion, generating for regulating the instruction of advocating drawing device and/or auxiliary tensioning equipment stretching force, making described opinion drawing device carry out stretch-draw according to identical stretch-draw progress to case beam with auxiliary tensioning equipment;
Wherein, master controller or assistant controller, according to respective oil pressure and stretch-draw displacement, control the servomotor executable operations of respective hydraulic control system respectively, comprising:
At stretch-draw and packing stage, the movement velocity when oil top accelerates, and when oil top rodless cavity pressure is close to setting value, reduces servomotor rotating speed, and the top displacement of realization oil, pressure steadily regulate;
When stretch-draw oil top oil pressure reduces to zero, control described servomotor and drive radial plunger pump to provide to stretch-draw oil top the oil pressure making its return with fixed rotating speed;
When stretch-draw displacement arrives the home position preset, control described servomotor out of service, and make the top drain charge of described stretch-draw oil.
7. system according to claim 6, is characterized in that, described stretch-draw sychronisation comprises:
Being used for more described opinion draws the comparison module of displacement and described auxiliary stretch-draw displacement, for obtaining comparative result;
Generating the adjustment module of regulating command according to described comparative result, regulating its stretching force for making opinion drawing device and/or auxiliary tensioning equipment according to described regulating command.
8. system according to claim 6, is characterized in that, described opinion drawing device and auxiliary tensioning equipment comprise respectively:
Stretch-draw oil top;
Connect the hydraulic control system on described stretch-draw oil top;
Be used for detecting the oil pressure sensor of oil pressure in hydraulic control system;
Wherein, during the stretch-draw on described stretch-draw oil top, hydraulic control system passes through continuous flow regulation, the stretching force sudden change on the stretch-draw avoiding flow drastic change to bring oil top.
9. system according to claim 8, is characterized in that, the hydraulic system of described opinion drawing device and auxiliary tensioning equipment comprises respectively:
The servomotor that the rotating speed connecting described master controller or assistant controller can regulate continuously;
Connect the radial plunger pump of described servomotor;
Be connected to the 3rd solenoid operated directional valve between described radial plunger pump and the oily rodless cavity pushed up of stretch-draw;
Connect the 4th solenoid operated directional valve between the rodless cavity on described stretch-draw oil top and fuel tank;
Wherein, when oil pressure is less than oil pressure map value, controls servomotor rotating speed and improve gradually, drive radial plunger pump to push up to stretch-draw oil the oil pressure providing pressure to increase gradually via described 3rd solenoid operated directional valve;
When described oil pressure equals described oil pressure map value, control servomotor and enter the pressurize operational phase, make described stretch-draw oil top be in load and maintain state;
After packing stage terminates, via the oil pressure on stretch-draw oil top described in the 4th solenoid operated directional valve slow releasing.
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| CN201310047191.2A CN103088757B (en) | 2013-02-06 | 2013-02-06 | Box girder pre-stressed tension automatic control method and system |
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| CN201310047191.2A CN103088757B (en) | 2013-02-06 | 2013-02-06 | Box girder pre-stressed tension automatic control method and system |
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| CN103629173B (en) * | 2013-11-28 | 2015-12-02 | 湖南联智桥隧技术有限公司 | Prestressed stretch-draw hydraulic system, prestress tensioning equipment and controlling method thereof |
| CN111101445A (en) * | 2019-12-25 | 2020-05-05 | 河南永智科技有限公司 | Hydraulic system for intelligent prestress tensioning equipment and synchronous tensioning method thereof |
| CN113818349B (en) * | 2021-09-01 | 2023-09-01 | 厦门理工学院 | Bridge hogging moment tensioning method, device, equipment and readable storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100542615B1 (en) * | 2005-08-31 | 2006-01-11 | 노윤근 | Method for manufacturing prestressed girder using a system to operate computer-controlled hydraulic cylinders synchronously at multiple points |
| CN201801815U (en) * | 2010-09-02 | 2011-04-20 | 大西铁路客运专线有限责任公司 | Railway passenger dedicated line box girder prestressed numerical control intelligent tensioning system |
| CN102744785A (en) * | 2012-07-27 | 2012-10-24 | 上海同禾土木工程科技有限公司 | Automatic control method of concrete box girder prestress tensioning system |
| CN202519997U (en) * | 2012-04-06 | 2012-11-07 | 江西飞尚科技有限公司 | Numerical-control synchronous tensioning system of jack |
| CN202705919U (en) * | 2012-08-23 | 2013-01-30 | 中铁十三局集团第一工程有限公司 | Tension control device |
-
2013
- 2013-02-06 CN CN201310047191.2A patent/CN103088757B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100542615B1 (en) * | 2005-08-31 | 2006-01-11 | 노윤근 | Method for manufacturing prestressed girder using a system to operate computer-controlled hydraulic cylinders synchronously at multiple points |
| CN201801815U (en) * | 2010-09-02 | 2011-04-20 | 大西铁路客运专线有限责任公司 | Railway passenger dedicated line box girder prestressed numerical control intelligent tensioning system |
| CN202519997U (en) * | 2012-04-06 | 2012-11-07 | 江西飞尚科技有限公司 | Numerical-control synchronous tensioning system of jack |
| CN102744785A (en) * | 2012-07-27 | 2012-10-24 | 上海同禾土木工程科技有限公司 | Automatic control method of concrete box girder prestress tensioning system |
| CN202705919U (en) * | 2012-08-23 | 2013-01-30 | 中铁十三局集团第一工程有限公司 | Tension control device |
Non-Patent Citations (1)
| Title |
|---|
| 全自动智能预应力张拉设备液压系统研究与设计;李文锋，廖强，罗斌，饶枭宇;《公路交通技术》;20121225(第6期);68-71页第3节，图1-3 * |
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