CN104874614A - Emulsion fine cooling system control method and control device - Google Patents
Emulsion fine cooling system control method and control device Download PDFInfo
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- CN104874614A CN104874614A CN201410071042.4A CN201410071042A CN104874614A CN 104874614 A CN104874614 A CN 104874614A CN 201410071042 A CN201410071042 A CN 201410071042A CN 104874614 A CN104874614 A CN 104874614A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
Abstract
The invention relates to an emulsion fine cooling system control method. The emulsion fine cooling system control method is characterized by comprising the following steps that the plate-shaped residual defect is calculated in dependence on steel strip contact tension data detected by a frame outlet plate-shaped roller; 2) the valid nozzle number is calculated in dependence on the plate-shaped residual defect and the steel strip width, N (valid)=B/52, wherein B is the steel strip width (mm), and the distance between any two adjacent nozzles is 52mm; 3) the number N (open) of nozzles which need to be opened is calculated in dependence on a selected proportion, N (open) = N (valid)*K1, K1 is the selected open proportion, and is generally selected to be 50%, and the K1 can be reset as needed; 4) the positions of the N (open) nozzles are searched in dependence on the optimal algorithm, the positions of the N (open) nozzles are N (open) points where the plate-shaped residual defect is maximal; 5) through a direct optimum seeking method, a residual plate-shaped deviation value [epsilon]I is found out, and the number of points which are smaller than or equal to the residual plate-shaped deviation value is just equal to N (open); and 6) the optimum seeking is carried out through the above way until the condition is satisfied.
Description
Technical field
The present invention relates to a kind of spray cooling system, especially design a kind of emulsion precise controlling method for controlling cooling system and implement device of cold-rolling mill, belong to equipment cooling and lubricating system field.
Background technology
What require product quality along with metallurgical industry improves constantly, higher requirement be it is also proposed to rolled piece lubricating system stability, and wherein the whether normal of spray cooling system has the greatest impact to quality, main location is produced to the plum steel of high-grade tin plate, in order to obtain high-quality product, have employed high accuracy and control spray cooling system, the thermal expansion amount of effective control each section of roll, obtain roll crowns different on corresponding each measuring section, 26 cooling zones are constituted along the covering of the fan sprayed at 26 injection valves that have employed that the measuring section of 26 on roll barrel direction is corresponding at 5 rack outlet plate shape measurement rollers, the amount of cooling water of each cooling zone is controlled with this.Milling train spray cooling spray beam is installed on five frame entrance sides, divide and be listed in rolling line upper and lower sides, it act as and carries out subregion cooling to the roll surface of working roll, to eliminate higher-order wave shape in Strip Shape Control theory and local wave, its co-controlling that matches with last frame flatness control system, and by the axially displaced and roll cooling control system with roller, asymmetric roller declination, roll, thus make plate shape obtain effective control, meet the needs in market.
Usually, belt plate shape records template change by being contained in the template roller after frame by the differential tension that band steel contacts on template roller roll surface, band steel actual stress σ I i on each measuring section recorded is compared with the band steel stress setting value σ s i on each measuring section provided in a computer, then there is an adjusting deviation value Δ σ i between the two, and Δ σ i=σ s i-σ I i, least square method is adopted to obtain the deviate that adjusting deviation value is resolved into the flatness defect corresponding to different power by a Mathematical Modeling represented with quartic polynomial, this polynomial repressentation is y=A 0+A 1 x+A 2 x 2+A 3 x 3+A 4 x 4, correspond respectively to once, secondary, the adjusting deviation component of three times and four times flatness defects, like this, the band steel stress adjusting deviation that each measuring section exists is converted into again the adjustment difference component corresponding to different flatness defect, control correspondent section nozzle thus and spray the thermal expansion amount that different amount emulsion can control each section of roll, thus obtain roll crowns different on corresponding each measuring section, but this method to the identification of the complicated higher-order wave shape such as the oblique shear stress shape wave of any Local warping with significant limitation, and this Mathematical Fitting carries out the low precision of matching for complicated deviation profile Δ σ (x) such as mal-distributions, since fail the position finding Local warping to exist when recognizing the defects of plate form, sub-sectional cooling also just can not play a role with a definite target in view.4 incomplete polynomial method of identifications based on principle of least square method are adopted in the plat control system of original technology, in actual use, flatness defect kind identification method, because imperfection causes the performance of production technology not enough, thus cannot meet site technique demand.
Through retrieval, Chinese patent CN200810039856.4 discloses " method for controlling planeness of cold-rolling strip steel " and CN200810200733.4 discloses " integrated control method of cold-rolling strip steel flatness and lateral thickness difference ", but these two kinds of methods are carried out comprehensive coordination by strip profile and flatness and section configuration and controlled, realize reducing lateral thick difference of cold-rolling strip steels further raising on cold-rolling strip steel flatness quality base.Eliminate the impact of incoming hot rolled slab section configuration, glacing flatness and rolling technological parameter fluctuation on last rack outlet glacing flatness on the one hand in time, the glacing flatness quality of cold-strip steel can be improved further; On the other hand, each rack outlet glacing flatness is controlled automatically, the incidence of the abnormal conditions such as section, sideslip can be reduced, improve the stability of cold continuous rolling production process.But both do not have specifically to be described for the control method of spray cooling, separately also retrieve, Chinese patent CN200910194489.X discloses " direct-acting fine cooling electromagnetic injection valve " and CN200920208221.2 discloses " direct-acting fine cooling electromagnetic injection valve ", these two kinds patent discloses a kind of direct-acting fine cooling electromagnetic injection valve for the cooling of cold rolling strap sheet roll, by the signal of telecommunication of online plate shape, direct Controlling solenoid valve, by regulating the pulsewidth of the signal of telecommunication, thus in the fine adjustment unit interval injection valve spray the flow of cooling fluid, the roll thermal crown adjusting roll by cooling the sub-sectional cooling of breaker roll ensure that the quality of cold rolling band plate.But both still do not have specifically to be described for the control method of spray cooling yet, moreover this kind of device is for closed cold rolling mill, corrosivity emulsion is full of in frame, with the circumstance complication of steel in frame during rolling, frequent length of tape causes the damage of plant equipment, and the operational reliability of its electromagnetic jet valve is doubtful.Therefore, a kind of new technical scheme of exigence solves above-mentioned technical problem.
Summary of the invention
The present invention is just for the technical problem existed in prior art, the emulsion spray cooling system control method providing a kind of structure simple, easy to operate and control device, this technical scheme solves the problem of cold rolling mill exit Strip template complex seas and local wave, technical solution of the present invention is adopted effectively and rapidly the oblique shear stress shape wave of the complex seas on Strip and local wave and warpage to be eliminated, both promote strip steel plate surface quality, more effectively improve lumber recovery.
To achieve these goals, technical scheme of the present invention is as follows, a kind of emulsion spray cooling system control method, it is characterized in that, said method comprising the steps of, 1) according to rack outlet template Strip that roller is surveyed contact tension data, calculate template residual defect
2) calculate effective nozzle number according to template residual defect and strip width, and N effectively=B/52
In formula, B is strip width (mm), each nozzle distance 52mm,
3) calculate according to selected ratio and open nozzle number N and open, N opens=N effectively × K1,
K1 opens ratio for selected, and generally we elect 50 % as.Certainly K1 can be reset as required,
4) search N open position according to optimal algorithm, the position that N opens shower nozzle is that the maximum N of remaining flatness defect opens a point,
5) adopt Direct Search Method, find out a remaining plate shape deviate ε i, make the some number being more than or equal to this remaining plate shape deviate just in time for N opens individual,
6) optimizing is carried out according to above-mentioned method, until satisfy condition.
As a modification of the present invention, in described step 1, mes i represents each section of plate shape measured value, when aim curve is straight, can obtain each section of corrected value refi that roll crown is corresponding, α jPij represents the actual corrected value calculated, owing in fact can not reach corrected value by 100 %, so hope and to there is a difference between the corrected value of reality the smaller the better, namely residual flatness defect is less.The computing formula of the residual flatness defect that we propose is:
I=1 in formula ~ n is plate profile instrument sensor number effective in bandwidth; J=1 ~ m is conditioner number; Ref i is the corrected value that roll crown is corresponding; , mes i is each section of plate shape measurement value, the regulated quantity of α j needed for a jth adjuster; Pi j is the unit regulated quantity of a jth adjuster on i-th section, for making residual flatness defect minimum, object function ε i must be made to have minimum of a value, namely ask for
。
As a modification of the present invention, in described step 3, N opens=N effectively × K1, in formula, K1 opens ratio for selected, and K1 is set as being 50%, or resets K1 as required.
As a modification of the present invention, described step 5 optimization method is as follows:
ε( K +1 ) =ε( K ) +Δε( K )
Δε( K ) = h ( K ) ×P ( K )
In formula, h (K) is optimizing step-length, and h (K)=L/2 n, n is optimizing number of times, L is initial optimizing siding-to-siding block length, initial optimizing interval is [-25,25], P (K) is search direction, depends on that remaining plate shape deviate ε i's is positive and negative.
A kind of emulsion spray cooling control device, it is characterized in that, described control device comprises detecting unit, control unit, performance element, computer control system, described detecting unit comprises rack outlet and detects tension force template roller, its body of roll is set to 26 sections, and every section is respectively arranged with the pressure sensor that 4 are detected tension force, totally 104 on circumference 0 °, 90 °, 180 ° and 270 ° of four directions, and by it, the differential tension value of the different sections detected is transferred to computer control system
Described control unit comprises plate form control system and flatness control system, the tension variation signal transmitted by template roller carries out conversion calculations process, 1 unrestrained A 1 x 4 is by inclination process, 2 unrestrained A 2 x 2 are by roll shifting and roller process, high order wave A 3 x 3+A 4 x4 of 3 times 4 times by spray cooling process, by given for signal transacting pneumatic clack box.
As a modification of the present invention, described performance element comprises spray beam, input duct, admission line, bottom working roll, top working roll, Strip, tube bank connecting interface, A nozzle, B nozzle, C nozzle, atmospheric control casing, source of the gas, upper surface controls source of the gas, lower surface controls source of the gas, emulsion variable frequency pump, emulsion heater, piston cecum cavity, built-in compressed air, spray beam casing internal emulsification liquid medium cavity, injection valve valve body, injection valve set bolt, nozzle, injection channel, piston is connected cavity with air, piston element, described spray beam is set to two cavity structures, input duct and admission line are separated by described two cavate spray beam, the segmentation of cooling corresponds to the segmentation of plate shape measurement roller, be 26 sections altogether, every section of 52 mm, be arranged on 156 injection valves on upper and lower two spray beams, all adopt piston cylinder operator, described injection valve valve body relies on two set bolts to be fixed on by whole valve body on spray beam, valve body and spray beam contact surface, valve body and piston cecum cavity, valve body all adopts O type circle to seal with exhaust cavity, described O RunddichtringO is arranged in the seal groove of valve body outside.
As a modification of the present invention, described piston element comprises piston, piston the 4th rear end face, piston the 3rd end face, piston second end face, piston nose face, piston first segment nose circle face, piston second section nose circle face, piston the 3rd pitch circle end face, piston first seals, piston second seals, in valve body, mobile piston is installed, described piston is three-section type structure, sectional area is 3:2:1.5, piston the 4th rear end face is connected with the outlet of air operated reversing valve by spraying the tube bank in beam with Section of three piston rod, direct and the air of the cavity that the face of cylinder major part of piston the 3rd end face and second section piston rod also has the face of cylinder small part of Section three piston rod to form is connected, few portion, the face of cylinder of piston second front end face and the second piston rod also has large portion, the face of cylinder of first segment piston rod and has the emulsion that certain pressure sprays in beam casing internal emulsification liquid medium cavity and directly contact, piston first front end face directly controls emulsion opening and closing passage with valve body with few portion of first segment piston rod and directly contacts, both adopt clearance seal formula to coordinate.The steam vent be now connected with air can rapidly by outside direct for the residual air of first and second seal section exits valve body, forming negative pressure in cavity between first and second sealing makes spool action response time short, complete fast reaction, be adapted to the timely and effective property of breaker roll Crown control in technique, when control system accept detection signal need to open the cooling of spool breaker roll time, air operated reversing valve commutates, now no longer including air pressure acts on piston rear end face, piston promotes piston and moves upward towards the side closed under the pressure effect of emulsion, negative pressure in cavity between first and second sealing can enter atmospheric air again, assistance emulsification hydraulic is tried hard to recommend dynamic piston and is retreated until full open position by air pressure, spray cooling system single-nozzle flow is 37.42(L/min).
As a modification of the present invention, two peripheries of piston second section nose circle face and piston the 3rd pitch circle end face are respectively arranged with two seals, the damage entering into tracheal strips aggravation tracheae with mordant emulsion is prevented to be connected cavity generation external leakage with by piston with air, between the first sealing and second seal, piston and valve body are provided with the steam vent be directly connected with air, thus reduce the resistance promoting piston, when air operated reversing valve action, the rear end face that compressed air pressure acts on piston promotes the side that piston closes towards spool and moves upward.
Relative to prior art, beneficial effect of the present invention is as follows: 1) this technical scheme solves the problem of cold rolling mill exit Strip template complex seas and local wave, the technology of the present invention is adopted effectively and rapidly the oblique shear stress shape wave of the complex seas on Strip and local wave and warpage to be eliminated, both promote strip steel plate surface quality, more effectively improve lumber recovery; 2) this device spray cooling excellent, spray beam pressure distribution is applicable to, and there will not be the situation of local wave and complex seas; Control accuracy is high, and ability is strong; System run all right, operation runs easy, greatly facilitates the accepted product percentage of Strip; 3) this technical scheme has wide range of applications, can whole or major part use in system of the same type.
Accompanying drawing explanation
Fig. 1 is control flow chart of the present invention
Fig. 2-1 for figure of the present invention be spray cooling control drop into after the actual plate shape schematic diagram obtained.
Fig. 2-2 is depicted as on-gauge plate shape schematic diagram for figure of the present invention.
Fig. 3 is that system optimizing control of the present invention calculates schematic diagram.
Fig. 4 is apparatus of the present invention position scheme of installation.
Fig. 5 is that boom device position scheme of installation is sprayed in the present invention.
Fig. 6 is milling train five frame spray cooling system of the present invention composition.
Fig. 7 is nozzle closed condition schematic diagram of the present invention.
Fig. 8 is that nozzle of the present invention opens dress state schematic diagram.
Fig. 9 is inventive piston structural representation.
In figure: 1-sprays beam; 2-input duct; 3-admission line; 4-bottom working roll; 5-top working roll; 6-Strip; 7-restrains connecting interface; 8-A nozzle; 9-B nozzle; 10-C nozzle; 11-detects tension force template roller; 12-flatness control system; 13-atmospheric control casing; 14-source of the gas; 15-plate form control system; 16-upper surface controls source of the gas; 17-lower surface controls source of the gas; 18-emulsion variable frequency pump; 19-emulsion heater; 20-piston cecum cavity (built-in compressed air); 21-sprays beam casing internal emulsification liquid medium cavity; 22-injection valve valve body; 23-injection valve set bolt; 24-nozzle; 25-injection channel; 26-piston is connected cavity with air; 27-piston; 28-piston rear end face; 29-piston the 3rd end face; 30-piston second end face; 31-piston nose face; 32-piston first segment nose circle face; 33-piston second section nose circle face; 34-piston the 3rd pitch circle end face.
Detailed description of the invention
In order to deepen the understanding of the present invention and understanding, below in conjunction with the drawings and specific embodiments the present invention being made further instructions and introducing.
embodiment 1:
See Fig. 1-Fig. 3, a kind of emulsion spray cooling system control method, said method comprising the steps of, 1) according to rack outlet template Strip that roller is surveyed contact tension data, calculate template residual defect,
2) calculate effective nozzle number according to template residual defect and strip width, and N effectively=B/52
In formula, B is strip width (mm), each nozzle distance 52mm,
3) calculate according to selected ratio and open nozzle number N and open, N opens=N effectively × K1,
K1 opens ratio for selected, and generally we elect 50 % as.Certainly K1 can be reset as required,
4) search N open position according to optimal algorithm, the position that N opens shower nozzle is that the maximum N of remaining flatness defect opens a point,
5) adopt Direct Search Method, find out a remaining plate shape deviate ε i, make the some number being more than or equal to this remaining plate shape deviate just in time for N opens individual,
6) optimizing is carried out according to above-mentioned method, until satisfy condition.
As a modification of the present invention, in described step 1, mes i represents each section of plate shape measured value, when aim curve is straight, can obtain each section of corrected value refi that roll crown is corresponding, α jPij represents the actual corrected value calculated, owing in fact can not reach corrected value by 100 %, so hope and to there is a difference between the corrected value of reality the smaller the better, namely residual flatness defect is less.The computing formula of the residual flatness defect that we propose is:
I=1 in formula ~ n is plate profile instrument sensor number effective in bandwidth; J=1 ~ m is conditioner number; Ref i is the corrected value that roll crown is corresponding; , mes i is each section of plate shape measurement value, the regulated quantity of α j needed for a jth adjuster; Pi j is the unit regulated quantity of a jth adjuster on i-th section, for making residual flatness defect minimum, object function ε i must be made to have minimum of a value, namely ask for
。
As a modification of the present invention, in described step 3, N opens=N effectively × K1, in formula, K1 opens ratio for selected, and K1 is set as being 50%, or resets K1 as required.
As a modification of the present invention, described step 5 optimization method is as follows:
ε( K +1 ) =ε( K ) +Δε( K )
Δε( K ) = h ( K ) ×P ( K )
In formula, h (K) is optimizing step-length, and h (K)=L/2 n, n is optimizing number of times, L is initial optimizing siding-to-siding block length, initial optimizing interval is [-25,25], P (K) is search direction, depends on that remaining plate shape deviate ε i's is positive and negative.
The adjusting deviation component correspondent section roll that the band steel stress adjusting deviation that each measuring section exists is converted into again corresponding to different flatness defect sprays different amount emulsion, the thermal expansion amount of each section of roll can be controlled, thus obtain roll crowns different on corresponding each measuring section, in roll cooling control system, according to on each measuring section with the roll cooling component that steel stress is corresponding, the cooling set of each cooling zone is gone out by calculated with mathematical model, to ensure that roll has a basic amount of cooling water at any time in the operation of rolling simultaneously, this basic amount of cooling water is about 1/ 3 of maximum amount of cooling water.Export to subordinate's control device as the amount of cooling water of each cooling zone reality after these two amount of cooling water superpositions, and open and close corresponding control valve by control device, reach the object to Strip Shape Control.
See Fig. 2-1 and Fig. 2-2, according to of the present invention
oneplant in the technology of emulsion system spray cooling control method, the scope of milling train spray cooling system is the working roll-band steel roll gap lubrication of the 5th frame, the cooling of working roll roll surface subregion and backing roll-intermediate calender rolls roll gap lubrication three part, the plate shape measurement roller detecting tension fluctuation has 26 measuring sections along roll barrel direction, the thermal expansion amount of each section of roll can be controlled the different amount lubrication of correspondent section roll injection and cooling agent, thus obtain roll crowns different on corresponding each measuring section.5 # frame working roll upper and lower crossbeams are provided with 2 packaging type spray beam, and each spray beam is corresponding A/B/C tri-kinds of injection valves respectively, each injection valve 26 nozzles, corresponding 1 measuring section of each control valve.Like this, 26 measuring sections constitute 26 cooling zones by 26 injection valves, and are controlled the amount of cooling water of each cooling zone by it.The control of each cooling zone can be carried out separately; The opening/closing action of fine spray beam nozzle receives the measured signal of plate shape roller.In addition, on the horizontal same position of band steel, the corresponding symmetric position nozzle of upper and lower spray beam is that a road controls (i.e. magnetic valve a signal, but control source of the gas is one-to-two structure.Such as, have employed spray angle and all less nozzle of flow.In actual use, by with roller, CVC, the coordinating of roller declination, given play to larger effect.Fig. 2 shows the result of use of spray cooling.Fig. 2-1 is depicted as on-gauge plate shape, Fig. 2-2 is the actual plate shape obtained after spray cooling control input, as can be seen from Figure 2, substantially reach the band steel shape control target of expection after have employed above-mentioned control method, show that proposed spray cooling Controlling model and control strategy can meet the requirement of production and Strip Shape Control completely.
embodiment 2:see Fig. 4-Fig. 9, a kind of emulsion spray cooling control device, described control device comprises detecting unit, control unit, performance element, computer control system, described detecting unit comprises rack outlet and detects tension force template roller (11), its body of roll is set to 26 sections, every section is respectively arranged with the pressure sensor that 4 are detected tension force on circumference 0 °, 90 °, 180 ° and 270 ° of four directions, totally 104, and by it, the differential tension value of the different sections detected is transferred to computer control system
Described control unit comprises plate form control system 15 and flatness control system 12, the tension variation signal transmitted by template roller carries out conversion calculations process, 1 unrestrained A 1 x 4 is by inclination process, 2 unrestrained A 2 x 2 are by roll shifting and roller process, high order wave A 3 x 3+A 4 x4 of 3 times 4 times by spray cooling process, by given for signal transacting pneumatic clack box.
embodiment 3:see Fig. 4-Fig. 9, as a modification of the present invention, described performance element comprises spray beam 1, input duct 2, admission line 3, bottom working roll 4, top working roll 5, Strip 6, tube bank connecting interface 7, A nozzle 8, B nozzle 9, C nozzle 10, atmospheric control casing 13, source of the gas 14, upper surface controls source of the gas 16, lower surface controls source of the gas 17, emulsion variable frequency pump 18, emulsion heater 19, piston cecum cavity 20, built-in compressed air, spray beam casing internal emulsification liquid medium cavity 21, injection valve valve body 22, injection valve set bolt 23, nozzle 24, injection channel 25, piston is connected cavity 26 with air, piston element, described spray beam is set to two cavity structures, input duct 2 and admission line 3 are separated by described two cavate spray beam 1, the segmentation of cooling corresponds to the segmentation of plate shape measurement roller, be 26 sections altogether, every section of 52 mm, be arranged on 156 injection valves on upper and lower two spray beams, all adopt piston type 27 structure, described injection valve valve body 22 relies on two set bolts 23 to be fixed on by whole valve body 22 on spray beam 1, valve body 22 and spray beam 1 contact surface, valve body 22 and piston cecum cavity 20, valve body 22 all adopts O type circle to seal with exhaust cavity 26, described O RunddichtringO is arranged in the seal groove of valve body 22 outside.Source of the gas 14 is that 40UM filter enters pneumatic clack box 13 through filtering accuracy, Pneumatic pipe in all casings adopts quick coupling structure, pipeline pressure 5`8BAR, and tracheae leads to DN2.5,156 air operated reversing valves adopt collection dress side-by-side structure, are convenient to debug and the eliminating of fault from now on; Air valve arrangement mode adopts the 1A ~ 26A corresponding with A8, B9, C10 nozzle to be that a row is arranged in order, and 1B ~ 26B is that second row is arranged in order, and 1C ~ 26C the 3rd arranges and is arranged in order; Air operated reversing valve adopts the control mode of 1 control 2, and pneumatic direction valve namely in switch board controls one group of corresponding nozzle of upper and lower two spray beams, upper 1A and lower 1A, upper 2A and lower 2A ... upper 26A and lower 26A; B sprays beam and C spray beam controls also like this; All air supply hoses all adopt unique snap joint to connect; air supply hose internal layer bellows 321 stainless steels make; outside is the protective layer of 304 stainless steel wire braidings; this kind of bellows structure and concentric welding technology are that air supply hose provides one " fail safe protection "; that is; if braid is damaged, bellows internal layer absorbs distortion, can not break as helix tube.
embodiment 4:see Fig. 4-Fig. 9, as a modification of the present invention, described piston element comprises piston 27, piston the 4th rear end face 28, piston the 3rd end face 29, piston second end face 30, piston nose face 31, piston first segment nose circle face 32, piston second section nose circle face 33, piston the 3rd pitch circle end face 34, piston first seals 35, piston second seals 36, mobile piston 27 is installed in valve body 22, described piston 27 is three-section type structure, sectional area is 3:2:1.5, piston the 4th rear end face 28 is connected with the outlet of air operated reversing valve by the tube bank 7 of spraying in beam 1 with Section of three piston rod 34, direct and the air of the cavity that the face of cylinder major part of piston the 3rd end face 29 and second section piston rod 33 also has the face of cylinder small part of Section three piston rod 34 to form is connected, few portion, the face of cylinder of piston second front end face 30 and the second piston rod 33 also has large portion, the face of cylinder of first segment piston rod 32 and has the emulsion that certain pressure sprays in beam casing internal emulsification liquid medium cavity 21 and directly contact, piston first front end face 31 directly controls emulsion opening and closing passage 25 with valve body 1 with few portion of first segment piston rod 32 and directly contacts, both adopt clearance seal formula to coordinate.The steam vent be now connected with air can rapidly by outside direct for the residual air of first and second seal section exits valve body, forming negative pressure in cavity between first and second sealing makes spool action response time short, complete fast reaction, be adapted to the timely and effective property of breaker roll Crown control in technique, when control system accept detection signal need to open the cooling of spool breaker roll time, air operated reversing valve commutates, now no longer including air pressure acts on piston rear end face, piston promotes piston and moves upward towards the side closed under the pressure effect of emulsion, negative pressure in cavity between first and second sealing can enter atmospheric air again, assistance emulsification hydraulic is tried hard to recommend dynamic piston and is retreated until full open position by air pressure, spray cooling system single-nozzle flow is 37.42L/min.
embodiment 5:see Fig. 4-Fig. 9, as a modification of the present invention, two peripheries of piston second section nose circle face 33 and piston the 3rd pitch circle end face 34 are respectively arranged with two seals, the damage preventing from entering into tracheal strips aggravation tracheae with mordant emulsion be connected cavity 26 by piston with air external leakage occur, seal between 36 in the first sealing 35 and second, piston 27 is provided with valve body 1 steam vent be directly connected with air, thus reduce the resistance promoting piston, when air operated reversing valve action, the rear end face that compressed air pressure acts on piston promotes the side that piston closes towards spool and moves upward.
The emulsifiable solution medium controlled is extracted out by emulsion variable frequency pump 18 and is finally arrived spray cooling spray beam 1 by emulsion pipeline and corresponding emulsion by-pass valve control and the flowmeter that detects flow in main tank, and the motion that the action that the detection tension signal accepted by plate form control system 15 controls air operated reversing valve promotes valve core piston 27 realizes supply to emulsifiable solution medium or cut-out.Described emulsion pump is centrifugal multistage pump multiple centrifugal pump, adopts VFC; It is gate valve and stop valve that described emulsion controls pipeline, and its material is stainless steel; Described flow counts straight-through induction type structure, the accuracy that the guarantee of its function detects and rear step calculates.
A kind of emulsion system spray cooling control method course of work of the present invention is as follows: along with Strip 6 continues through milling train, by the zone detection of last rack outlet template roller 11, detection data are continued to be transferred to flatness control system 12 and plate form control system 15, and pass the signal in atmospheric control case control cabinet 13 by system-computed, what control air operated reversing valve obtains dead electricity, effectively control the motion of injection valve inner carrier 27, realize quick corresponding closedown or the unlatching of injection valve 23, also pass through the nozzle 8 of device own, 9, the adjustment of 10 angles, it is made to reach optimization, when occurring that rolling specs changes, when plate width needs change to adjust, can by can edge lubrication control device, carry out width adjusting, thus be further conducive to local wave and the complex seas of removing band steel, reach efficient fine cooling to control.
At least one in technical characteristic described in embodiment 2,3,4,5 and embodiment 1 can also combine by the present invention, form new embodiment.
It should be noted that above-described embodiment is only preferred embodiment of the present invention; be not used for limiting protection scope of the present invention; equivalent replacement done on the basis of the above or substitute and all belong to protection scope of the present invention, protection scope of the present invention is as the criterion with claims.
Claims (8)
1. an emulsion spray cooling system control method, is characterized in that, said method comprising the steps of, 1) according to rack outlet template Strip that roller is surveyed contact tension data, calculate template residual defect,
2) calculate effective nozzle number according to template residual defect and strip width, and N effectively=B/52
In formula, B is strip width (mm), each nozzle distance 52mm,
3) calculate according to selected ratio and open nozzle number N and open, N opens=N effectively × K1,
K1 opens ratio for selected, and generally we elect 50 % as;
Certainly K1 can be reset as required,
4) search N open position according to optimal algorithm, the position that N opens shower nozzle is that the maximum N of remaining flatness defect opens a point,
5) adopt Direct Search Method, find out a remaining plate shape deviate ε i, make the some number being more than or equal to this remaining plate shape deviate just in time for N opens individual,
6) optimizing is carried out according to above-mentioned method, until satisfy condition.
2. emulsion spray cooling system control method according to claim 1, it is characterized in that, in described step 1, mes i represents each section of plate shape measured value, when aim curve is straight, can obtain each section of corrected value refi that roll crown is corresponding, α jPij represents the actual corrected value calculated, and the computing formula of residual flatness defect is:
I=1 in formula ~ n is plate profile instrument sensor number effective in bandwidth; J=1 ~ m is conditioner number; Ref i is the corrected value that roll crown is corresponding, and mes i is each section of plate shape measurement value, the regulated quantity of α j needed for a jth adjuster; Pi j is the unit regulated quantity of a jth adjuster on i-th section, for making residual flatness defect minimum, object function ε i must be made to have minimum of a value, namely ask for
。
3. emulsion spray cooling system control method according to claim 1, is characterized in that, in described step 3, N opens=N effectively × K1, in formula, K1 opens ratio for selected, and K1 is set as being 50%, or resets K1 as required.
4. the emulsion spray cooling system control method according to claim 1 or 2 or 3, is characterized in that, described step 5 optimization method is as follows:
ε( K +1 ) =ε( K ) +Δε( K )
Δε( K ) = h ( K ) ×P ( K )
In formula, h (K) is optimizing step-length, and h (K)=L/2 n, n is optimizing number of times, L is initial optimizing siding-to-siding block length, initial optimizing interval is [-25,25], P (K) is search direction, depends on that remaining plate shape deviate ε i's is positive and negative.
5. an emulsion spray cooling control device, it is characterized in that, described control device comprises detecting unit, control unit, performance element, computer control system, described detecting unit comprises rack outlet and detects tension force template roller (11), its body of roll is set to 26 sections, every section is respectively arranged with the pressure sensor that 4 are detected tension force on circumference 0 °, 90 °, 180 ° and 270 ° of four directions, totally 104, and by it, the differential tension value of the different sections detected is transferred to computer control system
Described control unit comprises plate form control system (15) and flatness control system (12), the tension variation signal transmitted by template roller carries out conversion calculations process, 1 unrestrained A 1 x 4 is by inclination process, 2 unrestrained A 2 x 2 are by roll shifting and roller process, high order wave A 3 x 3+A 4 x4 of 3 times 4 times by spray cooling process, by given for signal transacting pneumatic clack box.
6. a kind of emulsion spray cooling control device according to claim 5, it is characterized in that, described performance element comprises spray beam (1), input duct (2), admission line (3), bottom working roll (4), top working roll (5), Strip (6), tube bank connecting interface (7), A nozzle (8), B nozzle (9), C nozzle (10), atmospheric control casing (13), source of the gas (14), upper surface controls source of the gas (16), lower surface controls source of the gas (17), emulsion variable frequency pump (18), emulsion heater (19), piston cecum cavity (20), built-in compressed air, spray beam casing internal emulsification liquid medium cavity (21), injection valve valve body (22), injection valve set bolt (23), nozzle (24), injection channel (25), piston is connected cavity (26) with air, piston element, described spray beam is set to two cavity structures, input duct (2) and admission line (3) are separated by described two cavate spray beam (1), the segmentation of cooling corresponds to the segmentation of plate shape measurement roller, be 26 sections altogether, every section of 52 mm, be arranged on 156 injection valves on upper and lower two spray beams, all adopt piston type (27) structure, described injection valve valve body (22) relies on two set bolts (23) to be fixed on by whole valve body (22) in spray beam (1), valve body (22) and spray beam (1) contact surface, valve body (22) and piston cecum cavity (20), valve body (22) all adopts O type circle to seal with exhaust cavity (26), described O RunddichtringO is arranged in the outside seal groove of valve body (22).
7. a kind of emulsion spray cooling control device according to claim 6, it is characterized in that, described piston element comprises piston (27), piston the 4th rear end face (28), piston the 3rd end face (29), piston second end face (30), piston nose face (31), piston first segment nose circle face (32), piston second section nose circle face (33), piston the 3rd pitch circle end face (34), piston first seals (35), piston second seals (36), mobile piston (27) is installed in valve body (22), described piston (27) is three-section type structure, sectional area is 3:2:1.5, piston the 4th rear end face (28) is connected with the outlet of air operated reversing valve by the tube bank (7) of spraying in beam (1) with Section of three piston rod (34), direct and the air of the cavity that the face of cylinder major part of piston the 3rd end face (29) and second section piston rod (33) also has few portion, the face of cylinder of Section three piston rod (34) to form is connected, piston second front end face (30) and the small part of the second piston rod (33) also have the large portion, the face of cylinder of first segment piston rod (32) and have the emulsion that certain pressure sprays in beam casing internal emulsification liquid medium cavity (21) and directly contact, piston first front end face (31) directly controls emulsion opening and closing passage (25) with valve body (1) with few portion of first segment piston rod (32) and directly contacts, both adopt clearance seal formula to coordinate.
8. a kind of emulsion spray cooling control device according to claim 6 or 7, it is characterized in that, two peripheries of piston second section nose circle face (33) and piston the 3rd pitch circle end face (34) are respectively arranged with two seals, the damage preventing from entering into tracheal strips aggravation tracheae with mordant emulsion be connected cavity (26) by piston with air external leakage occur, seal between (36) in the first sealing (35) and second, piston (27) is provided with valve body (1) steam vent be directly connected with air, thus reduce the resistance promoting piston, when air operated reversing valve action, the rear end face that compressed air pressure acts on piston promotes the side that piston closes towards spool and moves upward.
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