CN105618491A - Steel plate production method, device and control system for steel plate on-line solution - Google Patents
Steel plate production method, device and control system for steel plate on-line solution Download PDFInfo
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Abstract
The invention provides a steel plate production method, a device and a control system for steel plate on-line solution, and belongs to the technical field of metallurgy. According to the method, excess rolling heat after a steel plate is rolled is utilized to perform on-line solution treatment on the steel plate to obtain a specific steel plate microstructure and various properties in line with product requirements, so as to reduce carbon emission and lots of energy consumption during secondary heating of off-line heat treatment. The device for production and the control system are less in investment; and the cooling device is compact and high in cooling rate, can save energy, can cool steel plates with a wide thicknesses specification range in a controlled manner, is high in automatic control precision, makes a cooled steel plate good in shape, not only can be used in steel plate on-line solution treatment, but also can be applied to a process needing rapid cooling after rolling, even an off-line quenching process.
Description
Technical field
The invention belongs to metallurgical technology field, particularly relate to the on-line solution after a kind of steel plate rolls and process.
Background technology
Solution heat treatment refers to that alloy is heated to high temperature monophase field constant temperature to be kept, and Quick uniform cooling after making surplus fully be dissolved in solid solution mutually, to obtain the Technology for Heating Processing of supersaturated solid solution. Mainly improve plasticity and the toughness of steel and alloy, process for precipitation-hardening and get ready. Various phases in alloy can be made fully to dissolve, Intensive intervention body, and improve toughness and etch resistant properties, eliminate stress and softening, in order to continue processing or molding. Suitable in multiple special steel, especially potassium steel and austenitic stainless steel. For the alloy that degree of supersaturation is low, it is generally selected rate of cooling faster; For the alloy that degree of supersaturation is high, it is generally selected slower rate of cooling.
The traditional solution heat treatment of steel plate is to adopt the Equipment for Heating Processing separated with milling train to carry out off-line heat treatment, it is necessary to quickly cool down after reheating. This production technology not only increases equipment investment, and operation is various, and the production cycle is long, and steel plate reheats and consumes mass energy, causes that steel product cost increases, and can not meet large batch of fast pace and produces, greatly constrains the raising of economic benefit.
The heat treatment method of application number a kind of high-strength abrasion-proof steel plate that has been the patent disclosure of 201110220315.3, this technical scheme adopts off-line heat treatment technics to produce abrasion-resistant stee, and the steel plate after rolling needs through series of processes such as ball blast, heat-treatment furnace heating and quenchings.
And on-line solution process is the waste heat after utilizing steel hot rolling, control the rate of cooling after steel rolling, make temperature changing process closer to the heat treated temperature drop process of off-line, reaching same or like steel tissue and performance, its cooling procedure is also commonly referred to as the cooling of steel plate On-line Control or direct quenching. Its feature is as follows:
(1) owing to steel plate is directly entered burning optimization on line equipment after thermal straightening machine after finishing mill rolls, namely ensure that steel plate enter chiller before class's type, the steel plate needed for eliminating again common process reheats process, saves mass energy.
(2) reheat operation therefore decrease the Technology for Heating Processing time owing to eliminating, improve Equipment for Heating Processing ability accordingly, simultaneously because Equipment for Heating Processing is layout on-line, decrease the Plate Production cycle.
(3) owing to reheating process after saving steel plate cooling, therefore the hardening phenomenon that alloying element causes is decreased.
(4) remaining recrystal grain tiny in controlled rolling process and deform dislocation in a large number, relatively off-line heat treatment crystal grain more fine uniform, mechanical property is more excellent.
The cooling of steel plate On-line Control and quenching are the cooling technologies quickly grown since the eighties in last century. It is to be combined by On-line Control phase-change organization, thinning microstructure and other strengthening mechanisms, reduces alloy content, improves obdurability and the welding performance of material, thus realizing minimizing manufacture, saving the target of limited resources and energy-saving and emission-reduction. But owing to there is the problems such as steel plate cooling uniformity and Strip Shape Control, its potential ability is not fully exerted always. For this, domestic and international many scholars and steel plant research staff have carried out substantial amounts of experiment and applied research, and some new technique sequential use are to novel high-strength cooling device.
The device of application number a kind of cut deal direct quenching that has been the patent disclosure of 201010560843.9 and technique thereof, this technical scheme adopts the upper adjustable cooling facility for laminar flow of down-off, jet density is increased by solid matter form, controlled wide to temperature homogeneity by edge part shading device, but cooling facility for laminar flow is easy to be formed a large amount of occluded water on surface under mass-flow, affect cooling uniformity, especially wide plate; The masking amount of edge part shading device is arranged and actual hidden position controls to be all critical problem, and this patent there is no and relates to.
The direct quenching technique of application number a kind of applicable different-thickness high strength steel plate that has been the patent disclosure of 200910091825.8, it adopts high density section cooling, cold section by force is formed by upper stream collector and lower spray header, slightly cold section and fine cold-leg, cold section of adjustable flow is than for 1:1.4��1:3.0 by force, slightly cold section is fixed as 1:1.5 with fine cold-leg flow-rate ratio, can cooling metal sheets thickness range be 1��50mm, but only cold section of flow is adjustable by force for it, slightly cold section is fixing with fine cold-leg flow water ratio, steel plate width directional flow is non-adjustable, fine panel shape is difficult to for thin plate, during for slab intensity of cooling deficiency, this equipment also cannot realize pendulum steel cooling.
The press quenching manufacturing technique method of application number a kind of high toughness thick steel plate that has been the patent disclosure of 200810013604.4, it adopts Water-Curta in Cooling mode, it is only suitable for the steel plate that finished product thickness is 20��50mm, for being difficult to solve because of the even plate shape glacing flatness problem brought of inhomogeneous cooling compared with the steel plate of Thin Specs, and component requirements is harsh, it is difficult at steel alloy production field popularity.
In sum, a lot of very distinctive design and achievement in research is proposed both at home and abroad for some problems rolling the existence of rear on-line cooling, also good effect is achieved for solving some particular problems, but there is also the defect in a lot of design, such as major part is cool down without restricted type, the plate shape under high cooling rate it is difficult to ensure that after cooling; Generally all it is arranged on after milling train or after pre-straightening machine and before thermal straightening machine; The general device arrangement form all adopting DQ+ACC, it is difficult to reach the rate of cooling that full cooling procedure is consistent; In order to reach big temperature drop, the water yield of major part matching requirements is big, serious waste of resources; Steel plate for cooling zone does not detect and means of tracking, it is difficult to realize accurately pendulum steel and Automatic Control.
Summary of the invention
The technical problem to be solved is to provide a kind of for the Plate Production device of steel plate on-line solution, method and control system, it utilizes steel plate rolling waste heat after rolling, online steel plate is carried out solution treatment, to obtain specific steel plate metallographic structure and the properties meeting product requirement, save the carbon emission of off-line heat treatment post bake and a large amount of energy consumption. This process units and control system investments are few, chiller is compact energy-conservation, cooldown rate is high, the thickness specification limit of the steel plate that can be controlled cooling is big, automatically control precision height, cooling back plate shape is good, cannot be only used for the on-line solution of steel plate and processes, and after rolling for needs, quickly the technique of cooling, even out-line quenching technique can be applied.
A kind of Plate Production method for steel plate on-line solution of offer is provided, it is characterized in that: described Plate Production method realizes uniformly cooling by installing the full inclined jet quickly cooling device of down-off continuously adjustable segmentation roll-in on compact between thermal straightening machine and cold bed; Energy-saving water system is adopted to realize the big temperature drop under low water supply capacity; The multiple type of cooling and thermal straightening machine linkage is adopted to realize the thickness steel plate on-line solution from 6��80mm; Utilize Strip Shape Control technical optimization cooling back plate shape; Detecting device and position control method in steel plate water is utilized to realize steel plate being accurately positioned and following the tracks of in water; Utilize model cootrol technology, Process Control System and basic automation systems to realize the full-automatic of cooling procedure accurately to control.
Its described Plate Production method arranges a set of quickly cooling device between existing thermal straightening machine and steel plate cold bed, steel plate through milling train controlled rolling, after thermal straightening machine is aligned, this fast cooling device region is sent into by rollgang, carry out online water spray and control cooling solution treatment, steel plate reaches specific final cooling temperature according to predetermined cooling-rate curves under ensureing plate shape and the uniform state of cooling, be sent to steel plate cold bed by roller-way afterwards or foldback thermal straightening machine again align after deliver to cold bed, carry out the operations such as subsequent segment scale and process.
Its described Plate Production method utilizes steel plate rolling waste heat after rolling, online steel plate is carried out solution treatment, to obtain specific steel plate metallographic structure and the properties meeting product requirement, save the carbon emission of off-line heat treatment post bake and a large amount of energy consumption; Thermal straightening machine obtains effective performance; Quickly cooling device for rapid cooling zone length of field < 15m, it is achieved that 3��100 DEG C/s of cooling rate, temperature drop 900 DEG C, the on-line solution technique of thickness specification 6��80mm.
The Plate Production method of its described steel plate on-line solution has three kinds of mode of operations available, alternatively works, and described mode of operation is continuous mode, weave mode, empty pattern excessively; Wherein:
A, continuous mode: steel plate in quickly cooling water spray district disposable either directly through, its Negotiation speed is provided by field control computer and controls;
B, weave mode: when steel plate is thicker, adopt disposable either directly through continuous coo1ing pattern can not reach required chilling temperature time, then steel plate swings cooling in quickly cooling water spray district, and its swing speed and amplitude are fixed, and duration of oscillation is provided by field control computer and controls;
C, sky cross pattern:
C1: need not quickly cool down for some steel grade, Working mode set is that quick cooling does not put into, then steel plate by described quickly cooling sprinkling zone but does not cool down, now described floating frame and the top roll and the upper water injection system that are located thereon are lifted to extreme higher position, so that the roll gap between upper and lower roll is in spacing maximum position, simultaneously described lower water injection system uses excess flow or Minimum protection flowrate to supply water, so that each lower nozzle is carried out cooling protection;
C2: adopt the steel plate of quickly cooling in the original plan, before by straightener, operative employee judges according to situations such as plate shape, temperature, artificial cancellation quickly cools down, be manipulated by button to notify field control computer, then the mode of operation rolling rear quickly cooling system is heavily set to that sky crosses pattern by field control computer;
C3: when described flatness detection device detects that the nose shape needing cooling metal sheets is bad; in order to protect the nozzle on described spray box; described rolls rear quickly cooling system by described hoisting mechanism by the described urgent pull-up of floating frame; proceed to " empty " pattern, steel plate directly transfers out quickly cooling water spray district.
Plate Production method for steel plate on-line solution provided by the invention, is characterized in that described Plate Production method is between existing thermal straightening machine and steel plate cold bed, arranges a quickly cooling device;
Described quickly cooling device, at the upper and lower of the roller-way being positioned at transport steel plate, arranges the some groups of spray boxs with solid matter nozzle, water injection system and lower water injection system in composition simultaneously;
Described roller-way is made up of many rods, is positioned at above or below transported steel plate according to described rod, and many described rods are divided into top roll or lower roll, and many described top rolls constitute upper raceway, and many described lower rolls constitute lower raceway;
Described quickly cooling device, on the roller-way of steel plate transport line direction of advance, arranges a main frame structure, and described main frame structure is made up of a floating frame and a gate frame;
Described floating frame is liftable framework, is fixed in a vertically-guided frame; Described top roll and upper water injection system, be fixed on described floating frame; When steel plate does not need Quenching Treatment, floating frame is promoted to peak by the hoisting mechanism being connected on floating frame, in case high temperature sheet is by the baking deformation of upper water injection system;
Described gate frame is fixed frame, described lower roll and lower water injection system, is positioned at the lower section of described fixing gate frame;
Described upper and lower water injection system, on the path of described transport steel plate roller-way process, constitutes a quick cooling water spray district;
On roller-way beam between each lower roll described, installation settings has lower drainage system;
The water discharge pattern of the solid matter nozzle of described each spray box is the oblique spray form along steel plate trend, and the tiltedly spray spray site of the nozzle that described upper water injection system is corresponding with lower each position of water injection system is symmetrical arranged surface of steel plate is upper and lower;
The often nozzle on group spray box, with and nozzle interlaced arrangement on its adjacent spray box, uniformly cool down purpose with what reach the plate face to steel plate;
When described steel plate needs to carry out " quickly cooling " PROCESS FOR TREATMENT, after described thermal straightening machine " throwing steel ", described quickly cooling device is along the direction of advance of steel plate, start each group of spray box successively to catchment the two-way quck-opening valve of pipeline, interval according to set time, open the pipeline that catchments of each group of spray box in advance one by one, to reduce the water hammer effect impact to equipment;
Between the often group spray box of described quickly cooling device, it is provided with hold-down roller, intercept so that tiltedly water spray is formed, make the cooling effect tiltedly sprayed water without influence on later group spray box solid matter nozzle of tiltedly spraying water of previous group spray box solid matter nozzle, and plate face is formed certain constraint, drastic deformation when stoping steel plate to cool down in water;
The forward and backward side of described quickly cooling device, it is provided with air blowing device, and the water discharge pattern of the solid matter nozzle along last group spray box in steel plate direction of advance, is arranged to move towards reverse oblique spray form with steel plate, in order to guarantee surface of steel plate noresidue water;
In the porch of described quickly cooling device, being provided with measuring roll, if supplied materials steel plate thickness is more than the upper roller-way height set, measuring roll and supplied materials steel plate touch, and drive and move on measuring roll and export signal, activate floating frame hydraulic pressure fast lifting function;
Export at described thermal straightening machine, be provided with flatness detection device, for detecting the nose shape needing cooling metal sheets.
Present invention also offers a kind of quickly cooling device for steel plate on-line solution, it is characterized in that:
Described quickly cooling device is arranged between existing thermal straightening machine and steel plate cold bed, steel plate through thermal straightening machine or blooming mill controlled rolling, when cold temperature is opened in arrival, sprinkling zone is quickly cooled down by what roller-way sent into this quickly cooling device place, carrying out online water spray and control cooling solution treatment, steel plate reaches required final cooling temperature according to predetermined cooling-rate curves under ensureing template and the uniform state of cooling;
Wherein, described quickly cooling device is arranged between thermal straightening machine and steel plate cold bed, for compact full inclined jet quickly cooling device up and down, it adopts energy-saving water system to realize the big temperature drop under low water supply capacity, utilize Strip Shape Control technical optimization cooling back plate shape, utilize detecting device and position control method in steel plate water to realize steel plate being accurately positioned and following the tracks of in water, utilize model cootrol technology and basic automation systems to realize the full-automatic of cooling procedure and accurately control.
Inside the often group spray box of its described quickly cooling device, being separated into three sections in the direction of the width, respectively middle part and both sides, be all provided with interior exocoel, respectively outer shell cavity and internal shunt chamber, it is ensured that distribution uniform fluid flow, to realize the water Crown control in steel plate width direction; Described often group spray box is provided with 4 water inlets, and 4 described water inlets are connected with the described pipeline that catchments respectively through two-way quck-opening valve, by controlling being turned on and off of described two-way quck-opening valve respectively, it is achieved adjustable respectively with the water yield of both sides in the middle part of described spray box.
Present invention also offers a kind of Plate Production for steel plate on-line solution and control system, it is characterized in that:
Described whole Plate Production controls system and includes communication, interface, monitoring, logic control, kernel model; Its described kernel model includes cooling strategy, refrigerating mode, physical model, Controlling model, self learning model and adaptive approach;
While milling train obtains steel plate throwing steel signal, control system to described Plate Production and send this Steel Plate Information, described Plate Production controls system and receives Boot Model and computing module after Steel Plate Information, require to calculate according to the Steel Plate Information received and the cooling rate of technological requirement and temperature drop and obtain each section of required water yield of cooling and the steel plate traveling speed in water or to the time that cooled region swings again required for steel plate, and it is sent to slave computer, the speed and the rate of cooling that make thermal straightening machine perform by this, and cooling water flow regulates and is kept stable in setting value;
When steel plate is by thermometer before thermal straightening machine, described Plate Production control system carries out model according to actual measurement steel billet temperature and calculates, and the water yield and steel plate traveling speed are adjusted;
After steel plate completes cooling overall process, described Plate Production controls the final cooling temperature that system is surveyed according to steel plate, Boot Model self adapting and study function, next block plate is carried out Modifying model, whole production process is automatically set by system completely, slave computer stably performs, it is achieved that Plate Production controls the Automatic Control of system.
Its described Controlling model includes precomputation model, again computation model and feedback model.
Its described Plate Production controls system and utilizes detecting device in water to realize the control of steel plate high precision position, so that it is guaranteed that steel plate position when steel plate swings cooling in water is followed the tracks of accurately;
After described steel plate head arrives fast cold-zone hydraulic type material detector, described roller-way reverses with setting speed, after reversion certain time, roller-way forward advances to material tests point with setting speed, circulation swings, until steel plate duration of oscillation in water reaches temperature drop required time required by technique, steel plate leaves this cooling device.
Compared with the prior art, the invention have the advantage that
1. the technical program by installing the upper and lower full inclined jet quickly cooling device of compact between thermal straightening machine and cold bed, carry out online water spray and control cooling solution treatment, the uniformly cooling and the full-automatic of cooling procedure that achieve steel plate accurately control, steel plate under ensureing template and the uniform state of cooling in the process transmitted or advance, can reach required final cooling temperature according to predetermined cooling-rate curves;
2. adopt measuring roll to detect the thickness of supplied materials steel plate, it is prevented that steel plate collision nozzle or upper roller-way, hydraulic pressure quick-lift attachreactor fast lifting floating frame is set, operation safety and the service life of quickly cooling device nozzle and roller-way can be protected;
3. this cooling system small investment, chiller is compact energy-conservation, and cooldown rate is high, and the thickness specification limit of the steel plate that can be controlled cooling is big, automatically controls precision height, and cooling back plate shape is good, can save the carbon emission of off-line heat treatment post bake and a large amount of energy consumption.
Accompanying drawing explanation
Fig. 1 is the production procedure schematic diagram of the present invention;
Fig. 2 is that the present invention compares schematic diagram with existing online molten solid process route
Fig. 3 is fast cooling device integral layout structural representation of the present invention;
Fig. 4 is spray box structural representation of the present invention;
Fig. 5 is that nozzle of the present invention tiltedly sprays schematic diagram;
Fig. 6 is that energy saving water supply controls schematic diagram;
Fig. 7 controls schematic diagram for pendulum steel;
Fig. 8 is grid figure.
In figure, 1 is air jet system, and 2 is spray box device, and 3 is upper and lower roll duct device.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention will be further described.
In Fig. 1, technical scheme provides a kind of Plate Production method for steel plate on-line solution, and its described Plate Production method realizes uniformly cooling by installing the full inclined jet quickly cooling device of down-off continuously adjustable segmentation roll-in on compact between thermal straightening machine and cold bed; Energy-saving water system is adopted to realize the big temperature drop under low water supply capacity; The multiple type of cooling and thermal straightening machine linkage is adopted to realize the thickness steel plate on-line solution from 6��80mm; Utilize Strip Shape Control technical optimization cooling back plate shape; Detecting device and position control method in steel plate water is utilized to realize steel plate being accurately positioned and following the tracks of in water; Utilize model cootrol technology, Process Control System and basic automation systems to realize the full-automatic of cooling procedure accurately to control.
Its described Plate Production method arranges a set of quickly cooling device between existing thermal straightening machine and steel plate cold bed, steel plate through milling train controlled rolling, after thermal straightening machine is aligned, this fast cooling device region is sent into by rollgang, carry out online water spray and control cooling solution treatment, steel plate reaches specific final cooling temperature according to predetermined cooling-rate curves under ensureing plate shape and the uniform state of cooling, be sent to steel plate cold bed by roller-way afterwards or foldback thermal straightening machine again align after deliver to cold bed, carry out the operations such as subsequent segment scale and process.
Its described Plate Production method utilizes steel plate rolling waste heat after rolling, online steel plate is carried out solution treatment, to obtain specific steel plate metallographic structure and the properties meeting product requirement, save the carbon emission of off-line heat treatment post bake and a large amount of energy consumption; Thermal straightening machine obtains effective performance; Quickly cooling device for rapid cooling zone length of field < 15m, it is achieved that 3��100 DEG C/s of cooling rate, temperature drop 900 DEG C, the on-line solution technique of thickness specification 6��80mm.
The process route of on-line solution and off-line solid solution compares as shown in Figure 2.
One, process route and device:
The technical program install between spray box water proof roller-way, end to end adopt propellers divide water technology, outlet side reversely tiltedly spray sweep the air-blowing of water and entrance and exit and sweep water function (as shown in Figure 3), ensure that surface of steel plate noresidue water, reach steel plate cooling uniformly, the purpose that water outlet plate shape is good.
This quickly cooling device is often organized and is provided with hold-down roller between spray box, it is possible to tiltedly water spray is formed and intercepts, and makes one group of cooling effect tiltedly sprayed water without influence on next group tiltedly water spray. Portion compresses roller is set to propellers, is distributed in fast cooling device head-tail, plays guide functions, it is possible to effectively reduce the water layer ulking thickness being distributed in surface of steel plate.
Being provided with air blowing device before and after this quickly cooling device, last group water injector is arranged to move towards reverse oblique spray form with steel plate, in order to guarantee surface of steel plate noresidue water after water outlet.
The quickly cooling device of the technical program adopts the oblique spray apparatus of nozzle (as shown in Figure 4), has the flow adjustment range that comparison is wide in range, even if also can guarantee that stable water spray form under low discharge.
Spray box adopts burner design to have good blocking-proof result (as shown in Figure 5), even if there is single-nozzle blocking or fault, changes also extremely quick and convenient. Nozzle and adjacent spray box top nozzle on each spray box all stagger in order, such that it is able to meet cooling requirement rapidly and uniformly. Owing to chiller entirety all adopts nozzle tiltedly to spray design, the cooldown rate of uniformity can be reached thus for the whole cooling procedure of cut deal, it is possible to obtain better properties of product.
Spray box adopts syllogic design, it is possible to achieve the water Crown control in steel plate width direction.
This quickly cooling device porch is provided with measuring roll, if supplied materials steel plate thickness is more than the upper roller-way height set, will activate upper frame hydraulic pressure fast lifting function.
Quickly cooling device steel construction is made up of the main frame structure being arranged on steel plate transport line direction.
Quickly cooling device hoisting mechanism is made up of electric screw jacking system and hydraulic pressure fast lifting system.
Online rapid cooling is divided into totally 3 kinds of refrigerating modes, and namely continuous mode, weave mode, sky cross pattern.
Two, water system and method:
Press quenching device water system can be divided into middle water pressuring system, low pressure water system as required, and middle setting-out is directly supplied water by booster pump, and low setting-out is pressurized water supply after elevated tank water outlet. By adjusting water rate control steel plate cooldown rate, reach the properties of product required by technique. There is lower nozzle and roller-way defencive function simultaneously. (defencive function is realized by electrical control and the switching of feed water valve road)
For saving water resource, make water supply and energy saving control design case especially, as shown in Figure 6:
(1), in technique needs during hydraulic water, according to process requirements and the setting requirement controlling system, the first pneumatic operated valve 1 is opened, and the second pneumatic operated valve 2 cuts out, compression technology water in meeting;
(2), after middle compression technology water terminates every time, the first pneumatic operated valve 1 cuts out, and the second pneumatic operated valve 2 is opened, quickly to moisturizing in elevated tank.
(3) when technique arrives at next interval, the first pneumatic operated valve 2 cuts out, and the second pneumatic operated valve 1 is opened, and continues to meet middle compression technology water, so circulates.
This technology combines the weave mode of quickly cooling, it is possible to the on-line solution meeting relatively steel plate processes.
Three, Strip Shape Control technology:
(1) device design
This Technology design install between oblique spraying nozzle symmetrical above and below, spray box water proof roller-way, end to end adopt propellers divide water technology, outlet side reversely tiltedly spray sweep the air-blowing of water and entrance and exit and sweep water function, ensure that surface of steel plate noresidue water, reach steel plate cooling uniformly, the purpose that water outlet plate shape is good.
Thermal stress in Cooling Process for Steel Plate Based and structural stress are had certain negative function by upper and lower roller-way, are provided with upper hold-down roller for this this technology, and devise roller-way servo system, it is possible to guarantee that while improving plate shape roller-way will not be damaged.
(2) technological design
This patent adopts steel technology of reversely throwing, namely in the penultimate passage of the road number of times that former passage calculates by steel plate rolling to target thickness, strip steel is not depressed by last passage, directly sky crosses throwing steel, improve steel plate head plate shape, ensure that the safety of straightener and cooling device, improve rhythm of production simultaneously.
(3) flow Crown control technology
Not only water ratio is adjustable up and down for all of spray box designed by this invention, and on width, middle part and edge also achieve the independent adjustable controllable function of flow, it is ensured that the steel-plate shape after cooling.
Four, detecting device and position control method in steel plate water:
The present invention utilizes detecting device in water to realize steel plate high precision position to control, so that it is guaranteed that steel plate position when steel plate swings cooling in water is followed the tracks of accurate, concrete grammar as shown in Figure 7:
After steel plate head arrives fast cold-zone material detector (hydraulic type), roller-way reverses with setting speed, after reversion certain time, roller-way forward advances to material tests point with setting speed, circulation swings, until steel plate duration of oscillation in water reaches temperature drop required time required by technique, steel plate leaves this cooling device.
Five, basic automation systems:
The present invention is by the basic automation systems of water treatment system reasonable in design and hydraulic system, it is achieved the steel plate of on-line solution is the full-automatic accurately control of quick cooling procedure after rolling.
Basic automation systems comprise hardware configuration, grid arranges (as shown in Figure 8), public function (as followed the tracks of end to end with the communication of PLC and level two, steel plate, roller table speed control and signal measurement collection etc.), fast cooling device body controls, control to water management, Hydraulic Station and picture function etc.
Six, model Automatic Control technology:
This invention devises model full-automatic control system. Whole system includes communication, interface, monitoring, logic control, kernel model. Kernel model includes cooling strategy, refrigerating mode, physical model, Controlling model (precomputation model, again computation model and feedback model), self learning model and adaptive approach etc. While milling train obtains steel plate throwing steel signal, think that this cooling system sends this Steel Plate Information, model-controlled system receives Boot Model and computing module after Steel Plate Information, require to calculate according to the Steel Plate Information received and the cooling rate of technological requirement and temperature drop and obtain traveling speed in water of each section of required water yield of cooling and steel plate (or to time that cooled region swings again required for steel plate) and be sent to slave computer, the speed and the rate of cooling that make thermal straightening machine perform by this, and Flow-rate adjustment is kept stable in setting value; When steel plate is by thermometer before thermal straightening machine, model carries out model calculating according to actual measurement steel billet temperature, and the water yield and steel plate traveling speed are adjusted; After steel plate completes cooling overall process, the final cooling temperature that model system is surveyed according to steel plate, Boot Model self adapting and study function, next block plate is carried out Modifying model, whole production process ten thousand is but automatically set by model, and slave computer stably performs, it is achieved that model Automatic Control.
Technical scheme, realizes uniformly cooling by installing the full inclined jet quickly cooling device of down-off continuously adjustable segmentation roll-in on compact between thermal straightening machine and cold bed; Energy-saving water system is adopted to realize the big temperature drop under low water supply capacity; The multiple type of cooling and thermal straightening machine linkage is adopted to achieve the steel plate thickness on-line solution from 6��80mm; Utilize Strip Shape Control technical optimization cooling back plate shape; Detecting device and position control method in steel plate water is utilized to realize steel plate being accurately positioned and following the tracks of in water; Utilize model cootrol technology, Process Control System and basic automation systems to realize the full-automatic of cooling procedure accurately to control. This cooling system small investment, cooling line is short, chiller is compact energy-conservation, cooldown rate is high, the thickness specification limit of the steel plate that can be controlled cooling is big, automatically controls precision height, and cooling back plate shape is good, cannot be only used for the on-line solution of steel plate to process, and after rolling for needs, quickly the technique of cooling, even out-line quenching technique can be applied.
Claims (10)
1., for a Plate Production method for steel plate on-line solution, it is characterized in that:
Described Plate Production method realizes uniformly cooling by installing the full inclined jet quickly cooling device of down-off continuously adjustable segmentation roll-in on compact between thermal straightening machine and cold bed; Energy-saving water system is adopted to realize the big temperature drop under low water supply capacity; The multiple type of cooling and thermal straightening machine linkage is adopted to realize the thickness steel plate on-line solution from 6��80mm; Utilize Strip Shape Control technical optimization cooling back plate shape; Detecting device and position control method in steel plate water is utilized to realize steel plate being accurately positioned and following the tracks of in water; Utilize model cootrol technology, Process Control System and basic automation systems to realize the full-automatic of cooling procedure accurately to control.
2. the Plate Production method for steel plate on-line solution described in claim 1, it is characterized in that described Plate Production method arranges a set of quickly cooling device between existing thermal straightening machine and steel plate cold bed, steel plate through milling train controlled rolling, after thermal straightening machine is aligned, this fast cooling device region is sent into by rollgang, carry out online water spray and control cooling solution treatment, steel plate reaches specific final cooling temperature according to predetermined cooling-rate curves under ensureing plate shape and the uniform state of cooling, be sent to steel plate cold bed by roller-way afterwards or foldback thermal straightening machine again align after deliver to cold bed, carry out the operations such as subsequent segment scale to process.
3. the Plate Production method for steel plate on-line solution described in claim 1, it is characterized in that the rolling waste heat that described Plate Production method utilizes steel plate after rolling, online steel plate is carried out solution treatment, to obtain specific steel plate metallographic structure and the properties meeting product requirement, save the carbon emission of off-line heat treatment post bake and a large amount of energy consumption; Thermal straightening machine obtains effective performance; Quickly cooling device for rapid cooling zone length of field < 15m, it is achieved that 3��100 DEG C/s of cooling rate, temperature drop 900 DEG C, the on-line solution technique of thickness specification 6��80mm.
4. the Plate Production method for steel plate on-line solution described in claim 1, it is characterized in that the Plate Production method of described steel plate on-line solution has three kinds of mode of operations available, alternatively working, described mode of operation is continuous mode, weave mode, empty pattern excessively; Wherein:
A, continuous mode: steel plate in quickly cooling water spray district disposable either directly through, its Negotiation speed is provided by field control computer and controls;
B, weave mode: when steel plate is thicker, adopt disposable either directly through continuous coo1ing pattern can not reach required chilling temperature time, then steel plate swings cooling in quickly cooling water spray district, and its swing speed and amplitude are fixed, and duration of oscillation is provided by field control computer and controls;
C, sky cross pattern:
C1: need not quickly cool down for some steel grade, Working mode set is that quick cooling does not put into, then steel plate by described quickly cooling sprinkling zone but does not cool down, now described floating frame and the top roll and the upper water injection system that are located thereon are lifted to extreme higher position, so that the roll gap between upper and lower roll is in spacing maximum position, simultaneously described lower water injection system uses excess flow or Minimum protection flowrate to supply water, so that each lower nozzle is carried out cooling protection;
C2: adopt the steel plate of quickly cooling in the original plan, before by straightener, operative employee judges according to situations such as plate shape, temperature, artificial cancellation quickly cools down, be manipulated by button to notify field control computer, then the mode of operation rolling rear quickly cooling system is heavily set to that sky crosses pattern by field control computer;
C3: when described flatness detection device detects that the nose shape needing cooling metal sheets is bad; in order to protect the nozzle on described spray box; described rolls rear quickly cooling system by described hoisting mechanism by the described urgent pull-up of floating frame; proceed to " empty " pattern, steel plate directly transfers out quickly cooling water spray district.
5. the Plate Production method for steel plate on-line solution described in claim 1, is characterized in that described Plate Production method is between existing thermal straightening machine and steel plate cold bed, arranges a quickly cooling device;
Described quickly cooling device, at the upper and lower of the roller-way being positioned at transport steel plate, arranges the some groups of spray boxs with solid matter nozzle, water injection system and lower water injection system in composition simultaneously;
Described roller-way is made up of many rods, is positioned at above or below transported steel plate according to described rod, and many described rods are divided into top roll or lower roll, and many described top rolls constitute upper raceway, and many described lower rolls constitute lower raceway;
Described quickly cooling device, on the roller-way of steel plate transport line direction of advance, arranges a main frame structure, and described main frame structure is made up of a floating frame and a gate frame;
Described floating frame is liftable framework, is fixed in a vertically-guided frame; Described top roll and upper water injection system, be fixed on described floating frame; When steel plate does not need Quenching Treatment, floating frame is promoted to peak by the hoisting mechanism being connected on floating frame, in case high temperature sheet is by the baking deformation of upper water injection system;
Described gate frame is fixed frame, described lower roll and lower water injection system, is positioned at the lower section of described fixing gate frame;
Described upper and lower water injection system, on the path of described transport steel plate roller-way process, constitutes a quick cooling water spray district;
On roller-way beam between each lower roll described, installation settings has lower drainage system;
The water discharge pattern of the solid matter nozzle of described each spray box is the oblique spray form along steel plate trend, and the tiltedly spray spray site of the nozzle that described upper water injection system is corresponding with lower each position of water injection system is symmetrical arranged surface of steel plate is upper and lower;
The often nozzle on group spray box, with and nozzle interlaced arrangement on its adjacent spray box, uniformly cool down purpose with what reach the plate face to steel plate;
When described steel plate needs to carry out " quickly cooling " PROCESS FOR TREATMENT, after described thermal straightening machine " throwing steel ", described quickly cooling device is along the direction of advance of steel plate, start each group of spray box successively to catchment the two-way quck-opening valve of pipeline, interval according to set time, open the pipeline that catchments of each group of spray box in advance one by one, to reduce the water hammer effect impact to equipment;
Between the often group spray box of described quickly cooling device, it is provided with hold-down roller, intercept so that tiltedly water spray is formed, make the cooling effect tiltedly sprayed water without influence on later group spray box solid matter nozzle of tiltedly spraying water of previous group spray box solid matter nozzle, and plate face is formed certain constraint, drastic deformation when stoping steel plate to cool down in water;
The forward and backward side of described quickly cooling device, it is provided with air blowing device, and the water discharge pattern of the solid matter nozzle along last group spray box in steel plate direction of advance, is arranged to move towards reverse oblique spray form with steel plate, in order to guarantee surface of steel plate noresidue water;
In the porch of described quickly cooling device, being provided with measuring roll, if supplied materials steel plate thickness is more than the upper roller-way height set, measuring roll and supplied materials steel plate touch, and drive and move on measuring roll and export signal, activate floating frame hydraulic pressure fast lifting function;
Export at described thermal straightening machine, be provided with flatness detection device, for detecting the nose shape needing cooling metal sheets.
6., for a quickly cooling device for steel plate on-line solution, it is characterized in that:
Described quickly cooling device is arranged between existing thermal straightening machine and steel plate cold bed, steel plate through thermal straightening machine or blooming mill controlled rolling, when cold temperature is opened in arrival, sprinkling zone is quickly cooled down by what roller-way sent into this quickly cooling device place, carrying out online water spray and control cooling solution treatment, steel plate reaches required final cooling temperature according to predetermined cooling-rate curves under ensureing template and the uniform state of cooling;
Wherein, described quickly cooling device is arranged between thermal straightening machine and steel plate cold bed, for compact full inclined jet quickly cooling device up and down, it adopts energy-saving water system to realize the big temperature drop under low water supply capacity, utilize Strip Shape Control technical optimization cooling back plate shape, utilize detecting device and position control method in steel plate water to realize steel plate being accurately positioned and following the tracks of in water, utilize model cootrol technology and basic automation systems to realize the full-automatic of cooling procedure and accurately control.
7. the quickly cooling device for steel plate on-line solution described in claim 6, it is characterized in that inside the often group spray box of described quickly cooling device, it is separated into three sections in the direction of the width, respectively middle part and both sides, it is all provided with interior exocoel, respectively outer shell cavity and internal shunt chamber, it is ensured that distribution uniform fluid flow, to realize the water Crown control in steel plate width direction; Described often group spray box is provided with 4 water inlets, and 4 described water inlets are connected with the described pipeline that catchments respectively through two-way quck-opening valve, by controlling being turned on and off of described two-way quck-opening valve respectively, it is achieved adjustable respectively with the water yield of both sides in the middle part of described spray box.
8. control a system for the Plate Production of steel plate on-line solution, it is characterized in that:
Described whole Plate Production controls system and includes communication, interface, monitoring, logic control, kernel model; Its described kernel model includes cooling strategy, refrigerating mode, physical model, Controlling model, self learning model and adaptive approach;
While milling train obtains steel plate throwing steel signal, control system to described Plate Production and send this Steel Plate Information, described Plate Production controls system and receives Boot Model and computing module after Steel Plate Information, require to calculate according to the Steel Plate Information received and the cooling rate of technological requirement and temperature drop and obtain each section of required water yield of cooling and the steel plate traveling speed in water or to the time that cooled region swings again required for steel plate, and it is sent to slave computer, the speed and the rate of cooling that make thermal straightening machine perform by this, and cooling water flow regulates and is kept stable in setting value;
When steel plate is by thermometer before thermal straightening machine, described Plate Production control system carries out model according to actual measurement steel billet temperature and calculates, and the water yield and steel plate traveling speed are adjusted;
After steel plate completes cooling overall process, described Plate Production controls the final cooling temperature that system is surveyed according to steel plate, Boot Model self adapting and study function, next block plate is carried out Modifying model, whole production process is automatically set by system completely, slave computer stably performs, it is achieved that Plate Production controls the Automatic Control of system.
9. the Plate Production for steel plate on-line solution described in claim 8 controls system, it is characterized in that described Controlling model includes precomputation model, again computation model and feedback model.
10. the Plate Production for steel plate on-line solution described in claim 8 controls system, it is characterized in that described Plate Production controls system and utilizes detecting device in water to realize the control of steel plate high precision position, so that it is guaranteed that steel plate position when steel plate swings cooling in water is followed the tracks of accurately;
After described steel plate head arrives fast cold-zone hydraulic type material detector, described roller-way reverses with setting speed, after reversion certain time, roller-way forward advances to material tests point with setting speed, circulation swings, until steel plate duration of oscillation in water reaches temperature drop required time required by technique, steel plate leaves this cooling device.
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