CN102517430A - Strong wind cooling system for medium plate heat treatment - Google Patents
Strong wind cooling system for medium plate heat treatment Download PDFInfo
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- CN102517430A CN102517430A CN2011104192990A CN201110419299A CN102517430A CN 102517430 A CN102517430 A CN 102517430A CN 2011104192990 A CN2011104192990 A CN 2011104192990A CN 201110419299 A CN201110419299 A CN 201110419299A CN 102517430 A CN102517430 A CN 102517430A
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Abstract
The invention discloses a strong wind cooling system for medium plate heat treatment, which comprises a cooling air supply system and a control system; a steel plate is performed with strong wind cooling in a cooling chamber arranged along a conveying roller way, a plurality of cooling segments are held in the cooling chamber, each cooling segment is provided with an air supply system and a heat exchanger, and the cooling and cooling air circulation of the steel plate at the cooling segment are controlled by a process control system; the control mode of the conveying roller way comprises single transmission and group frequency conversion; the control system is composed of a transmission instrument system, a PLC system and a process control system; the process control system is used for dispatching a model parameter database according to a production plan, regulating a strong wind cooling strategy by a created strong wind cooling mathematical model, calculating a strong wind cooling procedure, and sending the cooling procedure to the PLC system to be executed and displayed on an interface; the process control system triggers the PLC to work by an inlet metal detector signal, and the PLC system is used for respectively executing the working procedures of the air supply system and the roller way system. The system disclosed by the invention has the advantages of improving the production efficiency and simplifies the operation steps.
Description
Technical field
The invention belongs to HTFX and process control technology field, relate in particular to a kind of plate thermal treatment high wind cooling system.
Background technology
At present; Effect in that plate thermal treatment field is air-cooled is limited; On the one hand because existing air-cooled apparatus cools ability is less, and the steel grade and the specification of pending plate are very limited, on the other hand because the air-cooled process control difficulty of steel plate is bigger; Can only accomplish " one is as cold as the end " in the time of most of, can not realize cooling path control.The high wind cooling is the Convective Heat Transfer that cooling air produces when the dirty mistake of differential pressure action high temperature heat-transfer surface, because the local coefficient of heat transfer that produces is bigger, this methods for cooling has been widely used in electric power, chemical industry and the refrigeration industry.Plate thermal treatment field is introduced in the high wind cooling, and it is the new trend of current plate heat treatment technics development that process of cooling is accurately controlled.
Patent CN101979675A discloses a kind of heat treatment furnace and has used the jet flow refrigerating unit, and the device blowing intensity successively decreases towards the discharge end direction from feed end successively, in order to increase the speed of cooling of workpiece leading portion, is particularly suitable for the cooling of tubular workpiece.This patent spray box form, interchanger form, cooling purpose and cooling workpiece type and difference of the present invention are bigger.Simultaneously, the refrigerating unit that this patent relates to is not equipped with system, the technology controlling and process of work-piece cools process is lacked the means of necessity.
Patent CN101571355A discloses a kind of strong loop quick cooling chamber, and lower air conduit forms strong convection to blowing workpiece surface in the utilization, reaches the purpose of fast cooling.The airduct structure that this patent adopts is simpler, is prone to produce the inhomogeneous cooling problem.Simultaneously, each airduct interconnects, and can not realize the subregion cooling, and process of cooling control handiness is less.In addition, this patent is not equipped with program control system, and more accurate cooling strategy and cooling rules can not be provided, and is not high to the whole control degree of process of cooling.
Summary of the invention
The purpose of this invention is to provide a kind of plate thermal treatment high wind cooling system, this system is applicable to than thin specification plate quenching (solid solution) and handles and the preceding processing under cooling fast of normalizing plate entering straightener.
Above-mentioned purpose realizes through following proposal:
A kind of plate thermal treatment high wind cooling system; Comprise cooling air feed system and system; It is characterized in that steel plate is accomplished the high wind cooling in a cooling room that is provided with along rollgang, hold a plurality of cooling sections in the cooling room; Each cooling section configuration one a cover air feed system and a cover interchanger are by cover program control system this cooling section steel plate temperature drop of control and cooling air circulation; Every cover air feed system divides the air feed pipe to form by a frequency conversion centrifugal blower, main feed pipe, shunting effuser and Duo Gen, Guan Yuyi spray box connection of every branch air feed; Frequency conversion centrifugal blower inlet is connected with the interchanger air outlet that is positioned at the cooling room bodies top in the one cover air feed system; Blower fan outlet successively with the master, divide the air feed pipe coupling; Divide air feed pipe and the corresponding connection of upper and lower spray box that is placed between the rollgang; The cooling room body is established air exhaust passage and is connected with the interchanger air intake vent, and cooling water system and cooling room body, interchanger are provided with together; The mode of rollgang is individual drive, frequency conversion in groups; System is made up of transmission instrumental system, PLC system and program control system three parts; Program control system is called the model parameter DB according to the production program; The high wind cooling mathematical model that utilize to make up is formulated the high wind cooling strategy, calculates high wind cooling rules, and will cool off rules and be sent in the PLC system and show in the execution and interface; The cooling strategy of the remaining cooling section of online correction, thereby control steel plate temperature drop rate and cooling path; Program control system is by inlet metal detector signal triggering PLC operation, and the PLC system carries out the operating regulation of air feed system and roller-way system respectively.
According to above-mentioned plate thermal treatment high wind cooling system; It is characterized in that; Spray box is made up of inner chamber, damping system and spray orifice three parts, and it is big that the wind sectional area is crossed in spray box inner chamber inlet side, and it is little that the wind sectional area is crossed in the closed side; Vertical roller-way sees that along the steel plate working direction spray box is at right angles trapezoidal, and the air intake side is vertical with the spray orifice face with closed side.
According to above-mentioned plate thermal treatment high wind cooling system, it is characterized in that, spray box inner chamber handicapping Buddhist nun device, damping system is two-layer porous sieve plate; The hole diameter of sieve (perforated) plate, inlet side is big, and the hole diameter of sieve (perforated) plate, air side is little, and cooling air gets into inner chamber by the spray box inlet side; Sprayed by spray orifice through damping system, spray orifice is installed on the spray orifice face, is the circular spray orifice of many rows; Last spray box spray orifice face is at downside, and following spray box spray orifice face is at upside, and both sides spray orifice face and roll surface distance is 100mm up and down.
According to above-mentioned plate thermal treatment high wind cooling system, it is characterized in that interchanger adopts fin tube type water-gas interchanger; Logical water coolant in the pipe, and the hot blast after the steel plate heat exchange is by between cooling room top suction heat exchanger fin, with water coolant generation heat exchange; Through control interchanger flooding quantity; Control heat exchange effect, and then controlled chilling wind injection temperature are limited to 55 ℃ on the heat exchanger exit water temperature.
According to above-mentioned plate thermal treatment high wind cooling system, it is characterized in that each cooling section program control system is called high wind cooling mathematical model formulation cooling strategy and each cooling section cools off rules, the cooling rules are issued to PLC system and transmission instrumental system; The PLC system is according to each cooling section air quantity, blast and the plate temperature measured value gathered in real time, and the difference that the two closed-loop controls of employing air quantity-blast make air quantity, blast actual value and set(ting)value is in allowed band, and controlled member is each cooling section fan frequency converter.
According to above-mentioned plate thermal treatment high wind cooling system; It is characterized in that; The high wind cooling strategy comprises each cooling section target cooling temperature, rate of cooling and roller-way steering logic, and high wind cooling rules comprise each spray box air demand, blast, injection temperature and steel plate gait of march.
According to above-mentioned plate thermal treatment high wind cooling system, it is characterized in that two kinds of heat exchange forms of high wind cooling system control: steel plate in the cooling room-cooling air heat exchange and interchanger water-gas heat exchange; When formulating the cooling rules; Be some temperature drop processes that wait with steel plate in the cooling section that every suit air feed system was directed against-cooling air heat transfer process is discrete, utilize steel plate-cooling air heat exchange models and interchanger water-gas heat exchange models to calculate each and wait interior wind parameter and the interchanger parameter of spraying of temperature drop section; During online corrected Calculation; According to real-time spray wind parameter, steel plate position and the interchanger parameter of transmitting of PLC; Each waits the gentle wind-warm syndrome of temperature drop section inner panel to utilize above-mentioned heat exchange models corrected Calculation, according to the difference adjustment cooling rules of calculated value and each cooling section thermopair actual measurement plate temperature.
According to above-mentioned plate thermal treatment high wind cooling system; It is characterized in that the PLC system carries out the operating regulation of air feed system and roller-way system respectively: cooling air is through main feed pipe, shunting effuser and divide the air feed pipe, is sprayed by upper and lower spray box with certain speed and pressure; The gas jet impact surface of steel plate; Produce the enhanced heat exchange effect, extract out by the cooling room top, after the interchanger cooling, be admitted to spray box again with the hot blast after the steel plate heat exchange; When metal detector detects steel plate head before the cooling room; Program control system formulates cooling strategy, calculate the cooling rules and by PLC system agendum; The interior roller-way of cooling room this moment rotates by setting roller speed, and while cooling room front roller-way transports steel plate by same roller speed and advances cooling room; When steel plate was about to out cooling room, roller-way was pressed roller speed rotation in the cooling room behind the cooling room, transports steel plate and goes out cooling room; When metal detector behind the cooling room detected the steel plate afterbody, roller-way stopped operating in the cooling room.
According to above-mentioned plate thermal treatment high wind cooling system, it is characterized in that said high wind cooling mathematical model comprises air feed parameter initialization model, cooling air injection temperature computation model, surface of steel plate integrated heat transfer coefficient computation model and steel plate temperature drop model; Air feed parameter initialization model comprises that air-supply pipeline calculates along stroke pressure loss calculating, air-supply pipeline local pressure loss calculating and spray orifice nozzle parameter, and calculation result is spray orifice spray wind speed degree, single spray orifice spray air quantity and single spray orifice spray wind pressure; Cooling air injection temperature computation model calculates exchanger heat efficient according to finned tube heat exchanger scantlings of the structure, water coolant water inlet-return water temperature, cooling water flow and heat exchanger entrance hot blast temperature, and then calculates heat exchanger exit cold wind temperature; Surface of steel plate integrated heat transfer coefficient computation model utilizes lumped parameter method to calculate each cooling section steel plate upper and lower surfaces integrated heat transfer coefficient according to the relation of the local coefficient of heat transfer and Reynolds number, jet length, injection diameter and jet temperature under many spray orifices of surface of steel plate jet impulse heat exchange situation; Steel plate temperature drop model adopts the two-dimension unsteady state heat conduction equation along thickness and width, and thermal physical property parameter changes with the plate temperature, utilize finite element model for solving obtain the interior steel plate of each temperature drop section wide to thick to temperature distribution.
Plate high wind cooling system of the present invention compared with prior art has following characteristics:
1, spray box adopts longitudinal variable cross-section technology and damping flow equalize technology, makes along each spray orifice air output of spray box length direction, blast unanimity, has effectively reduced the air feed fluctuation, has improved cooling uniformity.
2, through appropriate design nozzle spacing, injection diameter and jet length, make the heat exchange of many spray orifices of spray box jet impulse more even, reduce spray back and jet and interfere, strengthened the heat exchange effect.
3, spray box is along the roller-way symmetric arrangement up and down, and jet length equates, makes the steel plate upper and lower surfaces produce uniform enhanced heat exchange effect, has eliminated blind spot and eddy current, has controlled cold back plate shape preferably, has improved product lumber recovery and final product quality.
4, through appropriate design heat exchanger structure parameter, improved exchanger heat efficient, controlled in real time in conjunction with mathematical model of being set up and PLC, the realization wind-warm syndrome is accurately controlled, and accurately controls for the steel plate process of cooling to lay the first stone.
5, adopt the two closed-loop controls of air quantity-blast, realize constant, the controlled supply of cooling air, the accurate execution of cooling off rules for high wind creates conditions, and has improved the control accuracy of system.
6, program control system adopts trigger mechanism; The roller-way of combining closely control and produce chainly utilizes the mathematical model that makes up, and science, rationally formulates high wind cooling strategy and cooling rules; And be issued to automatically among the PLC carry out and the interface on show; Realized that steel plate high wind process of cooling is controlled accurately, automatically and cooling path is controlled, effectively raised production efficiency, simplified operation steps.
Description of drawings
Fig. 1 is the high wind cooling system equipment front view among the present invention;
Fig. 2 is the high wind cooling system equipment vertical view among the present invention;
Fig. 3 is the high wind cooling system equipment left view among the present invention;
Fig. 4 is the high wind cooling system PLC system schematic among the present invention;
Fig. 5 is the high wind cooling system program control system synoptic diagram among the present invention;
Fig. 6 is control of high wind cooling system grade and the model control synoptic diagram among the present invention.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the invention is described further.
The embodiment of high wind cooling apparatus of the present invention is at first described below.
High wind cooling system cooling room is divided into a plurality of cooling sections, and each cooling section comprises some spray box and some roller-ways up and down, and steel plate is being pressed the process speed motion on the roll surface between spray box up and down, and the roller-way mode is individual drive, frequency conversion in groups.Each cooling section is equipped with a cover air feed system, a cover interchanger and a cover system.The waterwall that is made up of water-cooled tube is installed in cooling room sidewall and the roof, and it act as and improves the steel plate speed of cooling and prevent that the steel plate heat from outwards transmitting, and at cooling water outlet flow valve is installed, and the monitoring cooling water flow changes.
In the high wind cooling system; Every cover air feed system possesses one group of frequency conversion centrifugal blower, a main feed pipe, a shunting effuser and some branch air feed pipes; Divide air feed pipe and the corresponding connection of spray box up and down; Fans entrance is connected with interchanger, and air feed system provides constant, controlled cooling air for each cooling section spray box.
Shown in Fig. 1 ~ 3, frequency conversion centrifugal blower 1 inlet of high wind cooling system equipment is connected with interchanger 2 air outlets, and blower fan 1 outlet is connected with main feed pipe 6, shunting effuser 7 and branch air feed pipe 8 successively; Divide air feed pipe 8 and last spray box 9 and following 10 corresponding connections of spray box, air exhaust passage is established at cooling room 3 tops, is connected with interchanger 2 air intake vents; Interchanger 2 is placed in cooling room body 3 tops, and cooling water system 4 is provided with cooling room body 3, interchanger 2 together, and spray box is along rollgang symmetric arrangement up and down; Last spray box 9, spray box 10 is placed between the rollgang 5 down; Place the upper and lower of the steel plate 11 of process of cooling respectively, the spray box spray orifice sprays wind towards steel plate, and spray box and roll surface vertical range are 100mm up and down; Design can make the steel plate upper and lower surfaces produce reinforcement convection effects, dead zone-eliminating and eddy current uniformly like this.Interchanger 2 adopts fin tube type water-gas interchanger, and cooling water system 4 connects the factory network of rivers.
High wind cooling system spray box is made up of inner chamber, damping system and spray orifice three parts.It is big that the wind sectional area is crossed in spray box inner chamber inlet side; It is little that the wind sectional area is crossed in the closed side; Vertical roller-way sees that along the steel plate working direction spray box is at right angles trapezoidal; The air intake side is vertical with the spray orifice face with closed side, and design can make along each spray orifice spray air quantity of spray box length direction and reach unanimity like this, improves cooling uniformity.Spray box inner chamber handicapping Buddhist nun device, this device is two-layer porous sieve plate, and the hole diameter of sieve (perforated) plate, inlet side is big, and the hole diameter of sieve (perforated) plate, air side is little, and cooling air gets into inner chamber by the spray box inlet side, is sprayed by spray orifice through damping system.Damping system plays shock absorption on the one hand, reduces the air feed fluctuation, and stable cooling air is provided, and plays the current-sharing effect on the other hand, reduces the difference of each spray orifice spray air quantity and spray wind pressure.Longitudinal variable cross-section and damping current-sharing plan have realized the control of spray box length direction discharge uniformity.The circular spray orifice of many rows is installed on the spray orifice face, through appropriate design nozzle spacing, injection diameter and jet length, makes the heat exchange of many spray orifices jet impulse more even, reduces spray back and jet and interferes, and strengthens the heat exchange effect.
High wind cooling system interchanger adopts fin tube type water-gas interchanger, comprises fin, water-cooled tube, shell and measuring instrument four parts.The multilayer fin is parallel to air flow line to be arranged, and many water-cooled tubes vertically pass fin, are connected with the extraneous network of rivers, and flow valve is installed on the water inlet manifold, are used to detect flooding quantity, on total rising pipe the water temperature appearance is installed, and is used to detect water temp.Hot blast with water coolant generation heat exchange, reaches the effect that strengthen cooling power through increasing heat interchanging area by between cooling room top suction heat exchanger fin.
Utilize known quantities such as water-cooled tube spacing, water-cooled tube diameter, spacing of fin, fin thickness, air flow line finned length, cooling water inflow and interchanger heat interchanging area; Calculate the interchanger water coolant tube bank outside surface air side coefficient of heat transfer; And then utilize the relation of all unmixed cross flow interchanger of two side liquids heat exchange unit number and thermo-efficiency to draw exchanger heat efficient; Last relation according to thermo-efficiency and cooling air temperature and temperature of cooling water; The heat exchanger entrance water temperature that provides by the heat exchanger entrance hot blast temperature that calculates according to heat exchange models, according to the extraneous network of rivers and calculate heat exchanger exit cooling air temperature according to the outlet water thermometer that heat exchanger exit water temperature appearance records, this temperature can be participated in steel plate-cooling air heat exchange as next cooling air injection temperature that circulates through suitable processing and calculated.
When high wind cooling system PLC receives work order, see Fig. 4, specify cooling section blower fan 1 by given frequency, cooling air is evacuated to blower fan 1 inlet by cooling room 3 through interchanger 2, and blast, wind flow check point P, Qf, fan frequency conversion reference mark C are set here.The cooling air that has certain pressure and speed by blower fan 1 outlet ejection after, import in shunting effusers 7 through each cooling section main feed pipe 6.Shunting effuser 7 is connected some minutes air feed pipes 8 with main feed pipe 6 relative opposite sides, and cooling air is along in the upper and lower spray box 9,10 in minute air feed pipe 8 entering cooling room bodies 3.Can calculate spray box 9,10 inlet end wind supply quantities, blast and wind-warm syndrome according to device parameter and blower fan frequency.Because spray box 9,10 adopts longitudinal variable cross-section and damping current-sharing plans, cooling air is even, stable pass through the two-layer porous sieve plate of damping system, is sprayed by the circular spray orifice of many rows that is installed on the spray orifice face.High wind process of cooling system combines spray box inlet end air output, blast, wind-warm syndrome and spray box scantlings of the structure can calculate spray orifice projection velocity, spray air quantity, spray wind-warm syndrome degree, jet angle and spray regime.Cooling air is by after spray box 9,10 sprays up and down, and jet impulse steel plate 11 surfaces produce the enhanced heat exchange effect.Cooling room 3 outlets are provided with point for measuring temperature T3, survey roller speed point V.Extract out by cooling room 3 tops with the hot blast after the steel plate heat exchange, get between fin fin and cooling water system 4 vertical installations through interchanger 2 air intake vents.After the abundant heat exchange of hot blast and water coolant, (point for measuring temperature T1) comes back in the blower fan 1 by interchanger 2 air outlets, continues the next round circulation.Can obtain interchanger 2 thermo-efficiency according to interchanger 2 air intake vent wind-warm syndrome, water inlet water temperature, water inlet flow (surveying discharge point QS), water outlet water temperature (point for measuring temperature T2) and interchanger 2 scantlings of the structure, and then calculate interchanger 2 air outlet wind-warm syndrome.The pipeline part of cooling water system 4 is connected to each cooling section interchanger 2 water inlet, according to high wind cooling system steering order regulating pondage; Another part is connected in the waterwall of cooling room 3 sidewalls and roof, when improving the cooling room evaporation efficiency, stops the steel plate heat outwards to be propagated.As long as cooling room work, cooling water system comes into operation always.
High wind cooling system system embodiment of the present invention is described below.
Shown in Fig. 5 ~ 6, high wind cooling system system possesses the secondary hierarchy of control, comprises transmission instrumental system, PLC system 12 and program control system 13 3 parts.In conjunction with level of factory MES or PCS, the real-time feedback that system can the implementation procedure parameter, the two closed-loop controls of air quantity-blast, wind-warm syndrome closed-loop control, steel plate follows the tracks of and the functions such as online correction of the precomputation of the chain control of roller-way, high wind cooling strategy and cooling rules, high wind cooling strategy and cooling rules.Two kinds of heat exchange forms of high wind cooling system control: steel plate in the cooling room-cooling air heat exchange and interchanger water-gas heat exchange.When calculating the cooling rules; Be some temperature drop processes that wait with steel plate in the cooling section that every suit air feed system was directed against-cooling air heat transfer process is discrete, utilize steel plate-cooling air heat exchange models and interchanger water-gas heat exchange models to calculate each and wait interior wind parameter and the interchanger parameter of spraying of temperature drop section.Each waits temperature drop section intrinsic parameter calculation process to be: at first accomplish air-supply pipeline according to air feed parameter initialization model 16 and calculate along stroke pressure loss calculating, air-supply pipeline local pressure loss calculating and spray orifice nozzle parameter, calculation result is spray orifice spray wind speed degree, single spray orifice spray air quantity and single spray orifice spray wind pressure; Combine surface of steel plate integrated heat transfer coefficient model 18 then; According to the relation of the local coefficient of heat transfer and Reynolds number, jet length, injection diameter and jet temperature under many spray orifices of surface of steel plate jet impulse heat exchange situation, utilize lumped parameter method to calculate each cooling section steel plate upper and lower surfaces integrated heat transfer coefficient; And then according to steel plate temperature drop model 19, adopt two-dimension unsteady state heat conduction equation along thickness and width, utilize finite element model for solving obtain the interior steel plate of each temperature drop section wide to thick to temperature distribution; At last, utilize cooling air injection temperature computation model 17, calculate exchanger heat efficient, and then calculate heat exchanger exit cold wind temperature according to finned tube heat exchanger scantlings of the structure, water coolant water inlet-return water temperature, cooling water flow and heat exchanger entrance hot blast temperature.So reciprocation cycle is cooled to target temperature until steel plate, thereby calculates temperature parameter and interchanger heat exchange parameter in the steel plate process of cooling.During online corrected Calculation; According to PLC system 12 real-time spray wind parameter, steel plate position and the interchanger parameters of transmitting; Each waits the gentle wind-warm syndrome of temperature drop section inner panel to utilize above-mentioned heat exchange models corrected Calculation, according to the difference adjustment cooling rules of calculated value and each cooling section thermopair actual measurement plate temperature.
Work flow: when cooling room inlet metal detector detects steel plate 11 head positions; High wind cooling system PLC system 12 sends to level of factory MES or PCS with the triggering signal of feedback through program control system 13; The latter sends to program control system 13 with steel plate 11 plan informations to be cooled, and these information comprise that steel grade, plate number, steel plate specification, target open cold temperature, target final cooling temperature, target cooling rate, cooling mode and steel plate alloying constituent.Program control system 13 formulates cooling strategies, calculate the cooling rules and by PLC system 12 agendums.PLC system 12 carries out the operating regulation of air feed system and roller-way system respectively: cooling air is through main feed pipe, shunting effuser and divide the air feed pipe; Spray by upper and lower spray box 10 with certain speed and pressure; Gas jet impact steel plate 11 surfaces; Produce the enhanced heat exchange effect, extract out by the cooling room top, after the interchanger cooling, be admitted to spray box again with the hot blast after steel plate 11 heat exchange; While cooling room front roller-way 14 transports steel plate by same roller speed and advances cooling room; When steel plate was about to out cooling room, roller-way 15 was pressed roller roller speed rotation in the cooling room behind the cooling room, transports steel plate and goes out cooling room; When metal detector behind the cooling room detected the steel plate afterbody, roller-way 5 stopped operating in the cooling room.
Claims (9)
1. plate thermal treatment high wind cooling system; Comprise cooling air feed system and system; It is characterized in that steel plate is accomplished the high wind cooling in a cooling room that is provided with along rollgang, hold a plurality of cooling sections in the cooling room; Each cooling section configuration one a cover air feed system and a cover interchanger are by cover program control system this cooling section steel plate temperature drop of control and cooling air circulation; Every cover air feed system divides the air feed pipe to form by a frequency conversion centrifugal blower, main feed pipe, shunting effuser and Duo Gen, Guan Yuyi spray box connection of every branch air feed; Frequency conversion centrifugal blower inlet is connected with the interchanger air outlet that is positioned at the cooling room bodies top in the one cover air feed system; Blower fan outlet successively with the master, divide the air feed pipe coupling; Divide air feed pipe and the corresponding connection of upper and lower spray box that is placed between the rollgang; The cooling room body is established air exhaust passage and is connected with the interchanger air intake vent, and cooling water system and cooling room body, interchanger are provided with together; The mode of rollgang is individual drive, frequency conversion in groups; System is made up of transmission instrumental system, PLC system and program control system three parts; Program control system is called the model parameter DB according to the production program; The high wind cooling mathematical model that utilize to make up is formulated the high wind cooling strategy, calculates high wind cooling rules, and will cool off rules and be sent in the PLC system and show in the execution and interface; The cooling strategy of the remaining cooling section of online correction, thereby control steel plate temperature drop rate and cooling path; Program control system is by inlet metal detector signal triggering PLC operation, and the PLC system carries out the operating regulation of air feed system and roller-way system respectively.
2. a kind of plate thermal treatment high wind cooling system according to claim 1; It is characterized in that; Spray box is made up of inner chamber, damping system and spray orifice three parts, and it is big that the wind sectional area is crossed in spray box inner chamber inlet side, and it is little that the wind sectional area is crossed in the closed side; Vertical roller-way sees that along the steel plate working direction spray box is at right angles trapezoidal, and the air intake side is vertical with the spray orifice face with closed side.
3. a kind of plate thermal treatment high wind cooling system according to claim 2 is characterized in that, spray box inner chamber handicapping Buddhist nun device, and damping system is two-layer porous sieve plate; The hole diameter of sieve (perforated) plate, inlet side is big, and the hole diameter of sieve (perforated) plate, air side is little, and cooling air gets into inner chamber by the spray box inlet side; Sprayed by spray orifice through damping system, spray orifice is installed on the spray orifice face, is the circular spray orifice of many rows; Last spray box spray orifice face is at downside, and following spray box spray orifice face is at upside, and both sides spray orifice face and roll surface distance is 100mm up and down.
4. a kind of plate thermal treatment high wind cooling system according to claim 1 is characterized in that, interchanger adopts fin tube type water-gas interchanger; Logical water coolant in the pipe, and the hot blast after the steel plate heat exchange is by between cooling room top suction heat exchanger fin, with water coolant generation heat exchange; Through control interchanger flooding quantity; Control heat exchange effect, and then controlled chilling wind injection temperature are limited to 55 ℃ on the heat exchanger exit water temperature.
5. a kind of plate thermal treatment high wind cooling system according to claim 1; It is characterized in that each cooling section program control system is called high wind cooling mathematical model formulation cooling strategy and each cooling section cools off rules, the cooling rules are issued to PLC system and transmission instrumental system; The PLC system is according to each cooling section air quantity, blast and the plate temperature measured value gathered in real time, and the difference that the two closed-loop controls of employing air quantity-blast make air quantity, blast actual value and set(ting)value is in allowed band, and controlled member is each cooling section fan frequency converter.
6. a kind of plate thermal treatment high wind cooling system according to claim 5; It is characterized in that; The high wind cooling strategy comprises each cooling section target cooling temperature, rate of cooling and roller-way steering logic, and high wind cooling rules comprise each spray box air demand, blast, injection temperature and steel plate gait of march.
7. a kind of plate thermal treatment high wind cooling system according to claim 5 is characterized in that, two kinds of heat exchange forms of high wind cooling system control: steel plate in the cooling room-cooling air heat exchange and interchanger water-gas heat exchange; When formulating the cooling rules; Be some temperature drop processes that wait with steel plate in the cooling section that every suit air feed system was directed against-cooling air heat transfer process is discrete, utilize steel plate-cooling air heat exchange models and interchanger water-gas heat exchange models to calculate each and wait interior wind parameter and the interchanger parameter of spraying of temperature drop section; During online corrected Calculation; According to real-time spray wind parameter, steel plate position and the interchanger parameter of transmitting of PLC; Each waits the gentle wind-warm syndrome of temperature drop section inner panel to utilize above-mentioned heat exchange models corrected Calculation, according to the difference adjustment cooling rules of calculated value and each cooling section thermopair actual measurement plate temperature.
8. a kind of plate thermal treatment high wind cooling system according to claim 5; It is characterized in that the PLC system carries out the operating regulation of air feed system and roller-way system respectively: cooling air is through main feed pipe, shunting effuser and divide the air feed pipe, is sprayed by upper and lower spray box with certain speed and pressure; The gas jet impact surface of steel plate; Produce the enhanced heat exchange effect, extract out by the cooling room top, after the interchanger cooling, be admitted to spray box again with the hot blast after the steel plate heat exchange; When metal detector detects steel plate head before the cooling room; Program control system formulates cooling strategy, calculate the cooling rules and by PLC system agendum; The interior roller-way of cooling room this moment rotates by setting roller speed, and while cooling room front roller-way transports steel plate by same roller speed and advances cooling room; When steel plate was about to out cooling room, roller-way was pressed roller speed rotation in the cooling room behind the cooling room, transports steel plate and goes out cooling room; When metal detector behind the cooling room detected the steel plate afterbody, roller-way stopped operating in the cooling room.
9. a kind of plate thermal treatment high wind cooling system according to claim 5; It is characterized in that; Said high wind cooling mathematical model comprises air feed parameter initialization model, cooling air injection temperature computation model, surface of steel plate integrated heat transfer coefficient computation model and steel plate temperature drop model; Air feed parameter initialization model comprises that air-supply pipeline calculates along stroke pressure loss calculating, air-supply pipeline local pressure loss calculating and spray orifice nozzle parameter, and calculation result is spray orifice spray wind speed degree, single spray orifice spray air quantity and single spray orifice spray wind pressure; Cooling air injection temperature computation model calculates exchanger heat efficient according to finned tube heat exchanger scantlings of the structure, water coolant water inlet-return water temperature, cooling water flow and heat exchanger entrance hot blast temperature, and then calculates heat exchanger exit cold wind temperature; Surface of steel plate integrated heat transfer coefficient computation model utilizes lumped parameter method to calculate each cooling section steel plate upper and lower surfaces integrated heat transfer coefficient according to the relation of the local coefficient of heat transfer and Reynolds number, jet length, injection diameter and jet temperature under many spray orifices of surface of steel plate jet impulse heat exchange situation; Steel plate temperature drop model adopts the two-dimension unsteady state heat conduction equation along thickness and width, and thermal physical property parameter changes with the plate temperature, utilize finite element model for solving obtain the interior steel plate of each temperature drop section wide to thick to temperature distribution.
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| CN 201110419299 CN102517430B (en) | 2011-12-15 | 2011-12-15 | Strong wind cooling system for medium plate heat treatment |
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| CN 201110419299 Active CN102517430B (en) | 2011-12-15 | 2011-12-15 | Strong wind cooling system for medium plate heat treatment |
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| CN103381426A (en) * | 2013-07-04 | 2013-11-06 | 中钢集团邢台机械轧辊有限公司 | Automatic roller cooling temperature control method |
| CN103572015A (en) * | 2012-07-27 | 2014-02-12 | 苏州工业园区杰士通真空技术有限公司 | Vacuum gas quenching furnace quenching cooling automatic-control system |
| CN104386456A (en) * | 2014-10-29 | 2015-03-04 | 浙江家强铝业有限公司 | Heat sink for material conveying line of aluminum bar |
| CN107447099A (en) * | 2016-05-31 | 2017-12-08 | 宝钢工业炉工程技术有限公司 | Silicon strip steel heat treatment stove controls cooling section hot blast cooling device |
| CN108396117A (en) * | 2018-03-20 | 2018-08-14 | 上海恒精感应科技股份有限公司 | A kind of induction normalizing integration module assembly |
| CN109487072A (en) * | 2019-01-07 | 2019-03-19 | 山东宏旺实业有限公司 | A kind of steel band air cooling system |
| CN109487071A (en) * | 2019-01-07 | 2019-03-19 | 山东宏旺实业有限公司 | A kind of annealing furnace air cooling system |
| CN110315247A (en) * | 2019-06-10 | 2019-10-11 | 许幸有 | A kind of steel cutting cooling conveying equipment of steel plate |
| CN110358907A (en) * | 2019-07-19 | 2019-10-22 | 武汉山力板带技术工程有限公司 | A kind of strip cooling device, system and method |
| CN113604655A (en) * | 2021-08-09 | 2021-11-05 | 宝武集团鄂城钢铁有限公司 | Fog cold blowing control equipment, method and device and storage medium |
| CN114592112A (en) * | 2022-02-25 | 2022-06-07 | 东北大学 | Flexible cooling device for tempered steel plate |
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| EP2813584A1 (en) * | 2013-06-11 | 2014-12-17 | Linde Aktiengesellschaft | System and method for quenching a heated metallic object |
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| CN103572015A (en) * | 2012-07-27 | 2014-02-12 | 苏州工业园区杰士通真空技术有限公司 | Vacuum gas quenching furnace quenching cooling automatic-control system |
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| CN103381426B (en) * | 2013-07-04 | 2015-05-13 | 中钢集团邢台机械轧辊有限公司 | Automatic roller cooling temperature control device |
| CN104386456A (en) * | 2014-10-29 | 2015-03-04 | 浙江家强铝业有限公司 | Heat sink for material conveying line of aluminum bar |
| CN107447099A (en) * | 2016-05-31 | 2017-12-08 | 宝钢工业炉工程技术有限公司 | Silicon strip steel heat treatment stove controls cooling section hot blast cooling device |
| CN108396117A (en) * | 2018-03-20 | 2018-08-14 | 上海恒精感应科技股份有限公司 | A kind of induction normalizing integration module assembly |
| CN109487072A (en) * | 2019-01-07 | 2019-03-19 | 山东宏旺实业有限公司 | A kind of steel band air cooling system |
| CN109487071A (en) * | 2019-01-07 | 2019-03-19 | 山东宏旺实业有限公司 | A kind of annealing furnace air cooling system |
| CN110315247A (en) * | 2019-06-10 | 2019-10-11 | 许幸有 | A kind of steel cutting cooling conveying equipment of steel plate |
| CN110358907A (en) * | 2019-07-19 | 2019-10-22 | 武汉山力板带技术工程有限公司 | A kind of strip cooling device, system and method |
| CN113604655A (en) * | 2021-08-09 | 2021-11-05 | 宝武集团鄂城钢铁有限公司 | Fog cold blowing control equipment, method and device and storage medium |
| CN114592112A (en) * | 2022-02-25 | 2022-06-07 | 东北大学 | Flexible cooling device for tempered steel plate |
| CN116254407A (en) * | 2023-03-21 | 2023-06-13 | 昆明华信金属材料制造有限公司 | Air-cooled steel band cooling device |
| CN116254407B (en) * | 2023-03-21 | 2024-01-30 | 昆明华信金属材料制造有限公司 | Air-cooled steel band cooling device |
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