CN100576117C - Steel plate cooling control analog system - Google Patents
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- CN100576117C CN100576117C CN200710038523A CN200710038523A CN100576117C CN 100576117 C CN100576117 C CN 100576117C CN 200710038523 A CN200710038523 A CN 200710038523A CN 200710038523 A CN200710038523 A CN 200710038523A CN 100576117 C CN100576117 C CN 100576117C
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Abstract
The invention discloses a kind of steel plate cooling control analog system.By PLC connection procedure control device and cooling device analogue means, the cooling device analogue means comprises the cooling procedure temperature computing device that the gearing that is fixed with steel bar, analog temperature are measured and is used for that temperature shows patrols and examines display instrument, electro kinetic potential device, optoelectronic switch and position indicator, and optoelectronic switch is located on the operating path of steel bar.Process controller is finished the optimization setting function to the PLC controlled quentity controlled variable, and PLC finishes the Real Time Control Function of cooling simulation process, and the cooling device analogue means is carried out the actual switch of simulation cooling line and regulated action, and realizes process of real-time data acquisition.Hardware interconnection and software collaboration by above-mentioned each device are finished the system simulation of cooling control procedure, for the improvement of control system with improve process, provide a kind of pilot plant test device of Simulation evaluation.
Description
Technical field
The invention belongs to and roll back steel plate cooling procedure emulation and automatic control technology field, specifically, relate to steel plate cooling control analog system and method.
Background technology
Roll the online accelerating cooling process of back high temperature steel plate, be widely used in high strength, high tenacity, the good slab production run of weldability.The control cooling of steel plate is by to the steel plate Microstructure Control, reduces the input of alloy greatly, saves postprocessing working procedures, thereby reaches the purpose of saving cost, increasing economic efficiency.
Development along with controlled rolling and controlled cooling (TMCP) technology, the rate request that the cooling controlling value is set is more and more higher, whether the speed of physics-calculated with mathematical model meets the demands, the start-up point of tandem rolling cooling adjusts to where whether suitable and new learning algorithm plays optimization effect or the like, all be to existing system improve or adjustment process in the problem that must solve.But, above-mentioned any one improvement all needs have comprehensive grasp, docking port that abundant understanding is arranged to upper and lower machine system, big process modification also will be referred to the variation of system architecture, and these bring risk all can for the debugging of producing line, even may bring certain loss.
Though the paper publishing of many laminar flow cooling emulation is also arranged at present, but substantially all be based on the research of specific algorithm or some processes, the simulation software bag does not have the exchange of signals such as sensor and controller, it all is the simulation result that under many hypothesis prerequisites, obtains, can only carry out the algorithm evaluation to a certain extent, be difficult to realize the through engineering approaches research of general controls technology.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of steel plate cooling control analog system and method, can simulate easily to roll back steel plate cooling procedure.
In order to achieve the above object, technical scheme of the present invention is as follows:
A kind of steel plate cooling control analog system comprises the process controller and the cooling device analogue means that connect by data bus; Described cooling device analogue means comprises: gearing is fixed with a steel bar on it; Analog temperature is measured patrols and examines display instrument; The electro kinetic potential device rotates after the connection signal of reception from process controller, and the positional information of electro kinetic potential device is sent to process controller; Optoelectronic switch and position indicator, described optoelectronic switch are located on the operating path of steel bar; Process controller receives the steel bar positional information that measures from optoelectronic switch, and transmits control signal to position indicator.
Described process controller comprises: PLC; Monitoring module and process control module are connected by network with PLC; Industrial computer has analog to digital conversion end and digital-to-analog conversion end, and analog to digital conversion end wherein connects patrols and examines display instrument, and the digital-to-analog conversion end connects optoelectronic switch.
Described cooling device analogue means comprises: the bank light of simulating upper and lower chilled water zone; Group number that upper and lower chilled water is opened and position signalling are sent on the bank light appointed positions by PLC, and the bright/state of going out of lamp is sent to PLC.
The bank light in described upward chilled water zone and the bank light in following chilled water zone are respectively 19 prescription lamps in parallel.
The number of every prescription lamp is 2 or 3.
Described cooling device analogue means comprises side spray status indicator lamp, and process control module sends the bright/signal that goes out of lamp to side spray status indicator lamp by PLC.
Described cooling device analogue means comprises the simulation switch of flow switching valve up and down, and this switching signal is sent to process control module by PLC.
Described gearing comprises variable-frequency motor and by the belt pulley of this driven by motor, described variable-frequency motor links to each other with PLC.
Correspondingly, a kind of method for simulating steel board cooling control comprises the steps: that process control module is issued to the controlled quentity controlled variable of optimization setting calculating the data reception module of PLC by the TCP/IP network; The data collection module of PLC is uploaded to process control module with control signal and measured data by the TCP/IP network; PLC by with being connected of variable-frequency motor, position probing instrument and the motorized adjustment switch of the switching signal of cooling device analogue means, the motion of simulation steel plate, analog temperature measurement instrument, the position of simulation cooling metal sheets is followed the tracks of; PLC is according to the computing function of steel plate position signal enabling optimization setting model, the setting controlled quentity controlled variable of receiving course control module, finish setting adjusting for analogue flow rate equipment, switch, simulation edge part shading, and according to response time of practical adjustments valve, the time is regulated in design simulation, simulation physical device responsive state, thus determine the optimum controlling point position; The PID controller is realized closed-loop control to analogue flow rate variable valve and variable-frequency motor speed; PLC by the virtual steel plate that receives industrial computer and calculate in the temperature that arrives simulation cooling line diverse location, be uploaded to process control module, process control module sends to PLC after finishing the optimization again of setting controlled quentity controlled variable once more, and PLC realizes online optimal control.
The rate signal that PLC sets process control module sends variable-frequency motor to, and the variable-frequency motor drive pulley drives the steel bar motion.
When the steel bar head movement to optoelectronic switch check point place, optoelectronic switch sends the steel bar positional information to PLC, PLC according to steel bar positional information control position pilot lamp bright, go out.
Industrial computer utilizes heat-conduction equation to pass through the temperature value that the steel plate each point calculates in two-dimensional finite unit, with 500ms is to be sent to by the D/A card in the cycle to patrol and examine on the Displaying Meter, patrol and examine Displaying Meter the temperature value fixed cycle be sent to PLC, as the temperature measured data of cooling zone entrance and exit.
PLC sets the velocity of rotation of electro kinetic potential device, the given electro kinetic potential rotation time of optimization setting flow that provides according to process control module, PLC is handed down to the electro kinetic potential device with the connection signal of velocity of rotation and energising circuit, the electro kinetic potential device is connected, turning to desired location by given rotating speed, is that 0 signal then stops operating when receiving voltage.
Set 19 prescription lamps in parallel, PLC will control group number and the position that the upper and lower chilled water that requires opens and pass the signal on the bank light appointed positions by PLC, the bright cooling for this group of lamp opened, lamp goes out and closes for this group cooling, and the state acquisition of PLC general lamp this moment is controlled the affirmation of the water yield simultaneously.
Adopt above-mentioned simulation system of the present invention and method, for rolling back steel plate accelerating cooling process, the process control of host computer model, slave computer basic automatization PLC control are provided, The whole control system method for designing up to steel plate accelerated cooling device and control instrument, for the improvement of control system with improve process, provide a kind of whether reasonably pilot plant test device of Simulation evaluation such as cooling control system structure, cooling control system function, steel plate position tracking mode, controlling models performance, control method, learning algorithm that detects.These apparatus and method provide good simulated environment for system testing, learning algorithm debugging and closed loop control etc., have saved the on-line debugging time and have produced the expense of debugging, and greatly reduce the risk of reaching the standard grade.The beneficial effect that uses this simulation system and method to obtain is as follows:
● can provide the design proposal of cooling production line according to different technological requirements;
● because three grades of layerings of this device are clear, can realize closed-loop control to the control variable in this device well;
● can adjust Optimization Model, and can simulate assessment the effect of self-adaptation or self-learning algorithm;
● adopt device and method of the present invention, can realize that the Automatic Optimal of steel plate accelerating cooling process is set control, thereby, provide best control strategy for satisfying the mechanical property of cooling metal sheets better;
● adopt this device and method, can effectively simulate steel plate heart portion and surface temperature gradient.
Description of drawings
Fig. 1 is the structural representation of steel plate cooling control analog system of the present invention;
Fig. 2 is the communication synoptic diagram of each several part in the steel plate cooling control analog system of the present invention;
Fig. 3 detects the structural representation of simulating the device that is adopted to steel plate operation and steel plate position in the steel plate cooling control analog system;
Fig. 4 is the process flow diagram of method for simulating steel board cooling control of the present invention;
Fig. 5 is the synoptic diagram of the cooling device analogue means in the steel plate cooling control analog system of the present invention;
Fig. 6 is the temperature variation of the steel plate length direction cooling entrance and exit of simulation;
Fig. 7 is the speed curve diagram of the motor of dynamic control.
Embodiment
According to Fig. 1 to Fig. 7, provide better embodiment of the present invention, and described in detail below, enable to understand better function of the present invention, characteristics.
Fig. 1 is the structural representation of steel plate cooling control analog system of the present invention.As shown in the figure, steel plate cooling control analog system of the present invention comprises process controller and the cooling device analogue means that connects by data bus.The cooling device analogue means comprises temperature survey point simulation part, stroke adjustment simulation part, the side spray valve of flow control valve simulation part, edge part shading are opened display part, thermometal sensing point simulation part, the steel plate simulation part of patrolling and examining display instrument, moving on chilled water regional simulation part and the roller-way up and down measured of flow switching valve simulation part, analog temperature up and down up and down.The process control device comprises: PLC, monitoring module WINCC, process control module, and industrial computer.
Process control module by the precalculation module of finishing the cooling procedure preset functions, in cooling procedure, be optimized the online computing module of finding the solution, and realize that the back computing module of self-learning function constitutes.
Wherein precalculation module is made of physical compute devices and control calculation element, wherein physical compute devices is finished hot rerum natura and thermal conduction study correlation computations, with the measured value of the initial parameter (for example metallic sheet material data) of steel plate and mm finishing mill unit outlet (steel plate transmission speed for example, mm finishing mill unit exit point metal sheet surface temperature and roll back specification etc.), and technological requirement cooling target component is as the device input value.The control calculation element adopts neural networks principles that the output of physical compute devices is handled, in conjunction with the parameter of cooling control section cooling device and the qualifications of control aspect, obtain final precomputation result, comprise presetting the water yield, valve pattern, sheet metal benchmark travelling speed, covering setting etc.; Online computing module is made of measured data treating apparatus, On-line Control device and self-reacting device, by to the real-time follow-up of steel plate operation conditions with to the calculation process of the measured data of collecting, precalculation module is presetted the result carry out online optimization and find the solution, realize the real-time control of steel plate cooling procedure simulation; Back computing module carries out collection, processing, the statistical work of steel plate cooling procedure data, and finally it is filed.The device of self study simultaneously starts, the self study device is by checking the adaptation coefficient collection decision self study strategy when front spring classification correspondence, if to current sheet metal classification, the physical model calculating resultant error is bigger, then, find the solution and obtain the relevant physical model self study coefficient of steel plate classification by the startup self learning model.
At the function in the precomputation device, the user not only can select, and can also be each block configuration algorithms of different.Owing to adopt OO modularization programming mode fully, the user can self-defined algorithm also can the preference pattern storehouse in the existed algorithms module carry out simulating, verifying, increased the extensibility of design, planning.
The communication connected mode of each several part as shown in Figure 2 in the steel plate cooling control analog system, monitoring module WINCC is connected with PLC by the TCP/IP network with process control module, PLC links to each other with the remote I/O port by bus Profibus, relies on the remote I/O port to link to each other with the cooling device analogue means.
The cooling device analogue means as shown in Figure 5, include and patrol and examine display instrument 7a, 7b, 7c, electro kinetic potential device 2, electro kinetic potential device 3, pilot lamp 4, simulate optoelectronic switch 5 and position indicator 5 ' that the thermometal sensing point is used, simulation is the switch 6 of flow switching valve up and down, and the gearing of steel bar 9 operations of steel plate is represented in the bank light 8 in chilled water zone and driving about the simulation.
The observed temperature of analog temperature measurement point is with patrolling and examining display instrument 7a, 7b, 7c demonstration.It is to utilize heat-conduction equation to pass through the temperature value that the steel plate each point calculates in two-dimensional finite unit by industrial computer, with 500ms is to be sent to by the D/A card in the cycle to patrol and examine on display instrument 7a, 7b, the 7c, be sent to the AI terminal of PLC, as the temperature measured data of cooling zone entrance and exit with patrolling and examining temperature displayed value fixed cycle.
Simulation is the electro kinetic potential device 2 of flow control valve up and down.It is a velocity of rotation of setting electro kinetic potential device 2 by PLC, the rotation time of the given electro kinetic potential device 2 of optimization setting flow that provides according to process control module, PLC is handed down to electro kinetic potential device 2 with the connection signal of velocity of rotation and energising circuit together by the AO port, electro kinetic potential device 2 is connected, after turning to desired location by given rotating speed, be that 0 signal then stops operating if receive voltage.PLC comes in the 2 position actual value collections of electro kinetic potential device by the AI port again, so that reach closed-loop control, satisfies flow setting value.
The stroke adjustment of simulation edge part shading also is to adopt electro kinetic potential device 3, and process is the same.
Side spray valve is opened and is shown with pilot lamp 4 simulations.When process control module settings side sprays when opening or closing, PLC sends this signal to pilot lamp 4 by the DO port, and the bright representative side of lamp sprays out, and lamp goes out and represents the side spray to close.
Simulation is the switch 6 of flow switching valve up and down.Switch 6 connected represent this group cooling spray working properly, otherwise undesired, and the signal of the switch 6 DI port by PLC is sent to PLC, feed back to process control module again, so as when model optimization to be set consideration removal fault group shower nozzle.
Simulation is the bank light 8 in chilled water zone up and down.Simulate with 19 groups 3,2 square lamp parallel connections respectively in upper and lower chilled water zone, PLC will control group number that the upper and lower chilled water that requires opens and the position DO port by PLC and pass the signal on bank light 8 appointed positions, the bright cooling for this group of lamp opened, lamp goes out and closes for this group cooling, and the state acquisition of the DI port of PLC general lamp this moment is controlled the affirmation of the water yield simultaneously.
Consult Fig. 4, the steel plate that moves on the simulation roller-way, drive power wheel with a variable-frequency motor and drive belt movement, fix a steel bar 9 on the belt, steel bar 9 is to move in the centre joint on case surface, variable-frequency motor is housed behind the cabinet panel drives belt, when variable-frequency motor rotates, steel bar 9 is by the milling train position of simulation on the belt, and with the speed motion of setting, variable-frequency motor speed can constantly change simultaneously, also can reverse, make steel bar 9 come back to the initial point of milling train outlet, the rotating speed of variable-frequency motor simulation AI/AO port direct and PLC joins, so that realize dynamic adjustments.
Consult Fig. 3, the controlled quentity controlled variable that process controller calculates optimization setting is issued to the data reception module of PLC by the TCP/IP network, and the data collection module of PLC is uploaded to control signal and measured data the data processing module of process controller by the TCP/IP network; The variable-frequency motor of the switching signal of the I/O of while PLC and cooling analogue means, the motion of simulation steel plate, position probing instrument and motorized adjustment switch, the direct connection of analog temperature measurement instrument, the cooling effect of realization simulation steel plate can be realized the Position Tracking to the simulation cooling metal sheets.Start the computing function of optimization setting model in the basic automatization device according to tracking signal, the setting controlled quentity controlled variable of receiving course control device, finish and be analogue flow rate equipment, switch, the setting of simulation edge part shading is regulated, and according to response time of practical adjustments valve, the time is regulated in design simulation in Programmable Logic Controller, simulation physical device responsive state, thereby determine the optimum controlling point position, utilize the PID controller that analogue flow rate variable valve and motor speed are realized closed-loop control, simulation can manually be arranged on switch the simulation that closed condition realizes the cooling manifold malfunction to the control and the fault valve state of chilled water cashier's office in a shop, PLC by the virtual steel plate that receives industrial computer and calculate in the temperature that arrives simulation cabinet cooling line diverse location, be uploaded to process controller, process controller sends to PLC after finishing the optimization again of setting controlled quentity controlled variable once more, and PLC realizes online optimal control function.
After starting switch is pressed, PLC receiving course control device transmits the optimal control of getting off and sets, require speed according to setting, motor drives steel bar 9 motions, when steel bar 9 head movements to optoelectronic switch 5 check point places, optoelectronic switch 5 is blocked, signal is by 0 → 1, the DI of PLC end obtains this signal and is given to the DO port controlling pilot lamp 5 ' of PLC bright, when steel bar 9 afterbodys leave optoelectronic switch 5 check point places, optoelectronic switch 5 no longer is blocked, signal is by 1 → 0, and the DO end control pilot lamp 5 ' that the DI of PLC end obtains this signal and is given to PLC goes out, along with the motion of steel bar 9, pilot lamp 5 ' is bright successively, go out, on the simulation box panel, obtain simulating the demonstration that steel plate position is followed the tracks of; When steel bar 9 moves to A, obtain the steel billet temperature analogue value that industrial computer calculates, and according to setting the flow that requires, the group number that chilled water is opened, the position, the group number that side sprays out, the width that cover etc. are to DO, the AO end is regulated and is set, flow, cover the electro kinetic potential device is rotated according to the speed of PLC setting and the cycle of rotation, which organizes chilled water is opened, which side sprays out by the corresponding pilot lamp of simulation box panel bright demonstration, simultaneously, these actual analog quantitys (physical location of electro kinetic potential device) and switching value (light on and off of pilot lamp) signal pass through AI again, the DI end is sent to PLC, realize the collection of measured signal, finish the FEEDBACK CONTROL of PLC; When steel plate moves to B, receive industrial computer once more according to the actual given flow and the steel billet temperature analogue value of opening the calculating of chilled water group number, PLC sends data aggregation to process controller and makes its self-adaptation of finishing model and self-learning function.
The present invention utilizes the cooling device analogue means that whole cooling production line is carried out not dwindling of certainty ratio, has described the input-output characteristic of measuring instrument and topworks.Utilize variable-frequency motor drive belt to rotate and simulate the motion process of steel plate on cooling roller bed, utilize the electro kinetic potential device to simulate the adjustment process and the response time of whole cooling water inflow, utilization replaces on-the-spot grating and cold/hot metal detector near switch, on industrial computer, calculate mainly finishing relevant thermal conduction study, hot Calculation of Physical Properties and microstructure are calculated, to cool off temperature drop result of calculation by the A/D on the industrial computer, the D/A transition card is realized the real-time demonstration of steel billet temperature, and can be to undesired signal, malfunction is carried out the reality simulation, obtains the Optimal Control effect by the research of circuit controls method.
With respect to existing cooling simulation algorithm, the present invention has following characteristics:
1), physical unit platform, circuit controls platform, the optimization setting control platform control system experiment porch that (comprising process monitoring), several sub-platforms were formed by virtual objects platform, instrument and topworks are proposed at the steel plate cooling procedure.Framework the optimal control system architecture of forming by object, equipment, measuring instrument, circuit controls layer and optimization setting layer.Each sub-platform not only can collaborative work, finishes system design, also can work alone, and carries out modeling separately, the research of optimized Algorithm.
2) actual acceleration control cooling scheme that uses, all be that the controlling schemes of single control cooling section is found the solution, such scheme can't be cooled off control and cooling line adjustment design to the material with complex processing requirements (as, the manufacturing technique requirent of dual phase steel or phase steels).This patent can be to any production line, the control cooling index that a plurality of cooling sections, different cooling device (cold by force, weak cold etc.) propose is carried out simulation test, find the cooling line energy-saving design scheme that is fit to this production outline and productive capacity requirement, can solve cooling control problem well with complex processing requirements material.
3) in the existing acceleration control cooling scheme, equipment, instrument and cooling device itself is all very complicated, expensive, the cooling control system analogue means that this patent proposes is the simplification simulation to whole cooling procedure: basic automatization PLC only keeps the necessary module relevant with main gordian technique, She Ji physical simulation cabinet (comprises tracking, flow regulation to whole cooling line voluntarily, roller-way operation etc.) simulate, the range of instrument wherein, the physical size of device can be to 1) any cooling production line of design carries out the design and the debugging of control system.
4) in existing acceleration cooling controlling schemes, the cooling temperature drop controlled process of steel plate is in cooling device itself, the steel plate temperature drop object analog platform that this patent provides, be 3) the basis on, set up different object models (with the model bank of utilizing methods such as finite element and difference of heat content or latent heat foundation) for requirement of engineering, the steel plate chilling temperature is carried out segmentation to be calculated, at the Position Tracking point place that analogue means provides, be presented on the temperature display watch during with the temperature computation fructufy, as above-mentioned 2), 3) part is described, because this equipment simulating device can design according to technological requirement the ability of its cooling device, result calculated (being the variation of steel billet temperature) will change thereupon, has therefore avoided the restriction of device.
5) in existing simulating scheme, mostly adopt digital emulation.The analogue means that this programme proposes, not only can carry out structural design and optimization method adjustment to the process optimization controlled stage, and can the control loop of basic automatization PLC level directly be designed and adjust, unnecessaryly when online application do secondary development again, save debug time, avoided the debugging risk simultaneously.
6) optimal control platform of the present invention is pressed the engine request design fully, has taken into full account cross-platform design, and interface software designs at many PLC, helps the application of each subfunction or the application of level.
Example:
As given steel plate thickness 25.35mm, width 3857mm, length 21559mm, 793 ± 5 ℃ of milling train outlet temperatures, 530 ℃ of cooling target temperatures, cooldown rate 20K/S, steel grade is given, and the actual flow of controlled quentity controlled variable that process controller is set and electro kinetic potential device feedback is as follows:
| Collector number | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| Last flow set l/m2.min | 0 | 0 | 0 | 0 | 479 | 479 | 479 | 479 | 479 | 479 | 479 | 479 | 479 | 479 | 479 | 0 | 0 | 0 | 0 |
| The actual l/m2.min of last flow | 0 | 0 | 0 | 0 | 475.3 | 474.0 | 479.8 | 479.1 | 479.2 | 482.0 | 484.2 | 481.6 | 480.4 | 479.3 | 480.5 | 0 | 0 | 0 | 0 |
| Down-off is set l/m2.min | 0 | 0 | 0 | 0 | 1181 | 1181 | 1181 | 1181 | 1181 | 1181 | 1181 | 1181 | 1181 | 1181 | 1181 | 0 | 0 | 0 | 0 |
| The actual l/m2.min of down-off | 0 | 0 | 0 | 0 | 1182 | 1182 | 1152 | 1185 | 1216 | 1195 | 1187 | 1210 | 1209 | 1209 | 1189 | 0 | 0 | 0 | 0 |
| Edge part shading (mm) | 89 | 82 | 74 | 64 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
After the setting value of PLC receiving course control device, press start button, (setting speed=12mm/s), the driven by motor belt rotates motor, makes the steel bar setting in motion that is contained on the belt according to 500ms periodic refresh speed.When the simulation steel plate head moved to first optoelectronic switch position, the electro kinetic potential device that electro kinetic potential device that analogue flow rate is regulated and simulation are covered began action, reached flow and edge part shading and set the position that requires.When the simulation steel plate head ran to the optoelectronic switch position of cooling before the bank light, the bank light of simulation coolant valve state required to open successively according to optimization setting, opened simultaneously to require the side blowtorch opened.In steel plate when motion,, the corresponding variation takes place in the pilot lamp that the optoelectronic switch state is exported, and from Fig. 6,7 as can be seen, the temperature of cooling temperature drop computation model is respective change thereupon also, and motor speed also is dynamically to adjust.
Above-described; it only is preferred embodiment of the present invention; be not in order to limiting scope of the present invention, promptly every simple, equivalence of doing according to the claims and the description of the present patent application changes and modifies, and all falls into the claim protection domain of patent of the present invention.
Claims (8)
1, a kind of steel plate cooling control analog system is characterized in that, comprises the process controller and the cooling device analogue means that connect by data bus; Described cooling device analogue means comprises:
Gearing is fixed with a steel bar on it;
Analog temperature is measured patrols and examines display instrument;
The electro kinetic potential device rotates after the connection signal of reception from process controller, and the positional information of electro kinetic potential device is sent to process controller;
Optoelectronic switch and position indicator, described optoelectronic switch are located on the operating path of steel bar; Process controller receives the steel bar positional information that measures from optoelectronic switch, and transmits control signal to position indicator.
2, steel plate cooling control analog system according to claim 1 is characterized in that, described process controller comprises:
PLC；
Monitoring module and process control module are connected by network with PLC;
Industrial computer has analog to digital conversion end and digital-to-analog conversion end, and analog to digital conversion end wherein connects patrols and examines display instrument, and the digital-to-analog conversion end connects optoelectronic switch.
3, steel plate cooling control analog system according to claim 2 is characterized in that, described cooling device analogue means comprises the bank light in the upper and lower chilled water of simulation zone; Group number that upper and lower chilled water is opened and position signalling are sent on the bank light appointed positions by PLC, and the bright/state of going out of lamp is sent to PLC.
4, steel plate cooling control analog system according to claim 3 is characterized in that, the bank light in described upward chilled water zone and the bank light in following chilled water zone are respectively 19 prescription lamps in parallel.
5, steel plate cooling control analog system according to claim 4 is characterized in that, the number of every prescription lamp is 2 or 3.
According to claim 3 or 4 or 5 described steel plate cooling control analog systems, it is characterized in that 6, described cooling device analogue means comprises side spray status indicator lamp, process control module sends the bright/signal that goes out of lamp to side spray status indicator lamp by PLC.
7, steel plate cooling control analog system according to claim 6 is characterized in that, described cooling device analogue means comprises the simulation switch of flow switching valve up and down, and this switching signal is sent to process control module by PLC.
8, steel plate cooling control analog system according to claim 2 is characterized in that, described gearing comprises variable-frequency motor and by the belt pulley of this driven by motor, described variable-frequency motor links to each other with PLC.
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| CN112122361B (en) * | 2019-06-25 | 2022-10-14 | 上海梅山钢铁股份有限公司 | Laminar cooling control method for preventing medium-high carbon steel from cracking |
| CN114713639A (en) * | 2022-03-25 | 2022-07-08 | 北京科技大学设计研究院有限公司 | Shielding device control system |
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| CN1804621A (en) * | 2005-01-12 | 2006-07-19 | 宝山钢铁股份有限公司 | Simulating device for strip steel continuous annealing process |
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