CN1040130C - Apparatus and method for cooling of metallic belt - Google Patents

Apparatus and method for cooling of metallic belt Download PDF

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Publication number
CN1040130C
CN1040130C CN 93109047 CN93109047A CN1040130C CN 1040130 C CN1040130 C CN 1040130C CN 93109047 CN93109047 CN 93109047 CN 93109047 A CN93109047 A CN 93109047A CN 1040130 C CN1040130 C CN 1040130C
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CN
China
Prior art keywords
metal strip
width
shower nozzle
refrigerating unit
cooling
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Expired - Lifetime
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CN 93109047
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Chinese (zh)
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CN1088621A (en
Inventor
北川直人
大森清生
清家孝哉
大森宏次
山崎雅之
佐藤博明
大石均
铃木正史
吉冈修
荒木泰博
泽田弘
桥本和
小林秀峰
内野周三
佐藤秀树
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Japan Steel Pipe Co ltd
JFE Engineering Corp
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Japan Steel Pipe Co ltd
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Publication date
Priority claimed from JP5112488A external-priority patent/JPH06306485A/en
Priority claimed from JP15263593A external-priority patent/JP3191495B2/en
Priority claimed from JP5152634A external-priority patent/JPH06340913A/en
Priority claimed from JP5152636A external-priority patent/JPH06340928A/en
Priority claimed from JP5156361A external-priority patent/JP2979902B2/en
Priority claimed from JP5156362A external-priority patent/JP2979903B2/en
Priority claimed from JP5173682A external-priority patent/JP2979908B2/en
Priority claimed from JP5173683A external-priority patent/JP2906927B2/en
Priority claimed from JP5173684A external-priority patent/JPH0711346A/en
Application filed by Japan Steel Pipe Co ltd filed Critical Japan Steel Pipe Co ltd
Publication of CN1088621A publication Critical patent/CN1088621A/en
Publication of CN1040130C publication Critical patent/CN1040130C/en
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/613—Gases; Liquefied or solidified normally gaseous material
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/667—Quenching devices for spray quenching
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • C21D9/5735—Details
    • C21D9/5737—Rolls; Drums; Roll arrangements

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

A metal band cooling apparatus in a roll cooling machine on a heat treatment line, and a cooling method therefor. The basic characteristics of this invention reside in a roll cooling apparatus for regulating the contact length of a metal band with not less than one cooling roll by winding the metal band around the cooling rolls, the apparatus having a gas cooling unit disposed in an opposed state with respect to the cooling rolls via the metal band, and provided with not less than two nozzle headers extending in the lengthwise direction of the rolls, having a width smaller than that of the metal band; and a gas regulating unit for regulating the pressure or flow rate of a cooling gas in the nozzle headers.

Description

The metal strip refrigerating unit
The present invention relates to metal strip refrigerating unit and method of cooling thereof on the heat-treatment production line.
In the jet cooling and roller refrigerating unit on continuous annealing furnace, usually on the metal strip width, produce the even part of temperature distributing disproportionation, so that material quality problems such as shape defect inconsistent and that cause because of longitudinal bending take place, such problem is perhaps all arranged on the total length of sheet material.For this reason, open clear 60 the Japanese patent gazette spy---a kind of refrigerating unit of metal strip is disclosed in No. 169524, the structure of this device as shown in figure 40, metal strip is centered between many cooling roller #1～#4 back and forth, contact surface with the cooling roller carries out in the refrigerative device metal strip X, air jet system α 1～α 4 facing to cooling roller #1～#4 setting, on the whole plate width of metal strip X, be divided into many sections 10a---10e as shown in figure 41 like that, and each section all is provided with gas flow regulating valve 84a---84e, as sheet material thermometer 90e by the temperature distribution of the detection metal strip X width shown in Figure 40---90d calculates medial temperature poor of temperature on each aspect of plate width direction and plate width direction, and this temperature head is when surpassing the limit allow, detect this position,---87d regulates the corresponding gas flow regulating valve 84a in position therewith---84e by sheet material temperature-control device 87a at plate width direction.
At thickness of slab is 0.5---2.3mm, plate is wide to be 850---1575mm, the sheet material temperature of refrigerating unit import is 550---680 ℃, the sheet material temperature of refrigerating unit outlet is 350---under 480 ℃ the condition, stating a test-results with cooling roller cooled metal bands of carrying out on the physical device of structure in the use shows as shown in figure 42, in all cases, all be the medial temperature height of the temperature of wide both sides of plate and central authorities than plate width direction, the temperature curve of plate is W shape.
That is,, roughly in wide certain scope of plate, produce relatively and the positive temperature deviation of the medial temperature of plate width direction at the middle body of plate no matter the size of metal strip and cooling conditions are how.And, in the wide both sides of plate, make the temperature slippage of sheet material big more as thickness of slab, speed or with refrigerating unit, then the temperature deviation with respect to the medial temperature of plate width direction is just big more.
After the reason that produces this situation carried out test and analyzed, obtain following conclusion.When metal strip X is last around cooling roller #1, promptly produced the stress distribution of stretching/compression in the thickness of slab direction, cause that by the distortion of Poisson's ratio that above-mentioned stress caused the opposite compressive/tensile stress that meets at right angles on the direction (being plate width direction) with it distributes, cause such as shown in figure 43 being deformed into opposite curvature distortion on the right angle orientation (hereinafter referred to as shape of a saddle distortion) with principal curvature.
In case the distortion of this shape of a saddle takes place, just come in contact badly near the both sides of metal strip, cause the insufficient state of cooling, just produce positive temperature deviation with respect to plate width medial temperature.Only with the cooling of cooling roller the time, when metal strip advances to next one cooling roller, the loose contact that has difference to cause in the elongation of length direction owing to the metal strip that produces positive temperature deviation, further increased the loose contact that causes because of shape of a saddle distortion, it is developed to bigger positive temperature deviation direction.
By the amount Z that upwards floats in metal strip both sides metal strip and cooling discontiguous length L of roller and both sides that the coiling on the above-mentioned cooling roller causes, available following [numerical expression 11] and [numerical expression 12] are represented.For example, be 1.0mm at thickness of slab, cooling roller radius 800mm, the sheet material temperature is that contact length L is not about 15mm under 600 ℃ the condition, floatation volume Z is about 0.1mm.
[numerical expression 11] L = { ( Tb 2 E · v · R 4 + ( R · t ) 2 3 - Tb · R 2 E · v } 0 . 5
[numerical expression 12] z = { ( Tb E ) 2 · R + ( v · t ) 2 3 - Tb · R E } / 2 Wherein, L: metal strip and the cooling discontiguous length of roller (mm)
Z: floatation volume (mm) in the metal strip both sides
E: the Young's modulus of elasticity of metal strip (9.8 MPa)
T: the thickness of metal strip (mm)
υ: the Poisson's ratio of metal strip
Tb: linear tension (9.8 MPa)
R: cooling roller radius (mm)
But, in order to make the Japanese patent gazette spy open clear 60---the metal strip refrigerating unit in 169524 adapts to the cooling of metal strip width in a big way, must increase the number that air jet system separates greatly on plate width direction, cause gas flow regulating valve and gas pipeline also to increase significantly thus, thereby the shortcoming that cost of equipment is increased is arranged.
In addition, such among the disclosed embodiment of the Japanese patent gazette above-mentioned as shown in Figure 41, if the number that separates on the plate width direction is 5 o'clock, the width of shower nozzle separately is just very big, not only to increase gas flow, increase running expense, and can cause near the undercooling the metal strip both sides, just the problem of full and uniformization of temperature that can not reach plate width direction that shows just like following expression test-results such as Figure 56.
The present invention be exactly make in order to address the above problem provide a kind of usefulness cheap running expense, can in very big size range, make the equalizing temperature of plate width direction, simultaneously can make its quick refrigerative metal strip refrigerating unit.
For this reason, metal strip refrigerating unit of the present invention is that metal coil tape is on the cooling roller more than 1, and the roller refrigerating unit that the contact length of above-mentioned metal strip and each cooling roller is adjusted, its essential characteristic is: have and be provided with facing to ground across metal strip and above-mentioned cooling roller, two narrow shower nozzles of above metal strip width of ratio on the roller length direction, with these shower nozzles are made can be on the travel direction of cooling roller the structure that move freely, and at least one shower nozzle in these shower nozzles is made can be at the jet refrigerating unit of roller length direction from the structure that moves; And gas setting device (it is suitable that the sheet material temperature controlled of this structure and the rotating speed of describing later to the valve opening adjustment of pressure-regulating valve and air feed gas blower is controlled structure such as calculation apparatus) with the cooling gas pressure of adjusting each shower nozzle inside or gas flow.
The width of the focus during above-mentioned the sort of W shape uneven temperature distributes is very narrow, if resemble the structure in the past a plurality of shower nozzles of width equipment at metal strip, in that the suitable place of part of dividing plate with them all focus can appear, make those part coolings just very difficult, if refrigerative is talked about by force, peripheral part of focus will excessively cool off.In structure of the present invention, the shower nozzle of the narrower in width of jet refrigerating unit is moved directly over focus, the cooling gas of being adjusted excess pressure and flow by the gas setting device is blowed to this focus, in this way to this part cooling of concentrating, thereby solve the uneven temperature problem effectively.
Top said shower nozzle is made the structure that on the travel direction of cooling roller, can move freely, be because the cooling roller to change it with the contact length of metal strip will with the vertical direction of the production line of metal strip on move, be suitable for from the refrigerative distance at the roller back side last (promptly refer to and cool off roller and move to same direction synchronously) so above-mentioned shower nozzle just must will be in all the time; And, this shower nozzle (, make the shower nozzle in its right on do reciprocal moving to the retracted position direction when cooling roller when leaving strip production line for being contacted with metal strip.When the cooling roller began contacting metal band production line, shower nozzle was to compile return from it to put to moving near the direction of cooling off roller).
In addition, be the concentrated cooling of the focus that is fit to narrow width, preferably the jet hole of above-mentioned shower nozzle made roughly and the vertical narrow flute profile of the production line of metal strip, and can be adopted the shower nozzle that makes these jet holes on the production line direction, be arranged to row.
In order to improve thermal conductivity and to reduce the pressure-losses, the section form of this jet hole 11 is as Figure 44 (a)---(d) shown in, the section of its inside edge is made fillet R or inclined-plane, perhaps as (c), (d), jet hole 11 is made the shape to the outside protrusion.
When two shower nozzles being set, be arranged on the end of metal strip width at the roller length direction.As when being provided with 3, then one of them is arranged on the middle body of metal strip width, shower nozzle of (being arranged on central authorities) part also can be not move along the length direction of roller, be fixed on the structure on the middle body, simultaneously on remaining two ends that are configured in the metal strip width, the sheet material non-uniform temperature that can eliminate above-mentioned W shape so effectively distributes, and (above-mentioned temperature distributing disproportionation is even, usually two side portions is than the temperature height of central authorities, and institute is so that the shower nozzle of both sides is preferentially mobile).
Certainly, structure of the present invention is not only has only a cooling roller, also can adopt more than two, when a plurality of cooling roller is arranged in the structure, preferably wherein corresponding with initial cooling roller at least shower nozzle is provided with three, make above-mentioned showerhead configurations structure, further, can cool off these that roller is divided into the proparea and two of back zones are provided with regionally, the cooling roller in proparea is provided with 3 shower nozzles, make above-mentioned showerhead configurations, the cooling roller of facing the back zone is provided with 2 shower nozzles; Make the configuration of two above-mentioned shower nozzles.Why will be as top said, to initial cooling roller or to the cooling roller in proparea 3 shower nozzles are set, be because with the cooling roller begin to contact the time metal strip middle body if " central bulging " takes place [shown in Figure 45 (a), because of the shape of sheet material bad, the roll body part of the #1 roller that contacts with sheet material X not, to compare the part that contacts with sheet material colder owing to the effect of the refrigerant of cooling roller inside, even and the sheet material shape has improved, shown in figure (b), the middle body of sheet material X is not cooled off, because the temperature head on the sheet material width has produced as the situation of figure (c) the sort of sheet material middle body than the both sides elongation.This is called " central bulging ".For the poor especially thin thing of rigidity, section can take place when serious shrink] time, can the occurrence temperature skewness.And because the characteristic of cooling roller, in case uneven temperature takes place to distribute, this uneven program can increase later on, so during reaching that sheet material and cooling roller begin to contact, can not produce the purpose of shape defect, at least for the initial cooling roller or the cooling roller in proparea, at middle body shower nozzle is set also, by means of to the concentrated cooling of this part with carry out the problem (even material is very thick, it also is effective on initial cooling roller central shower nozzle being set) of air-cooled solving " central bulging " from the back side.On the contrary, if at 3 shower nozzles that at least the cooling roller setting in initial cooling roller or proparea comprised central shower nozzle, on follow-up cooling roller, it is just much of that only the metal strip both sides to be provided with shower nozzle respectively so.
On the other hand, as mentioned above, under the situation that a plurality of cooling rollers are set, can be designed to the shower nozzle in proparea different to the mode that moves of roller travel direction with the move mode of the shower nozzle of back zone.Promptly, the non-uniform temperature of eliminating the sheet material width of the reason that produces above-mentioned shape of a saddle distortion and so on distributes, must just adopt big amount of cooling water as far as possible in the upstream of the source region that produces this distortion, from early stage elimination metal strip and the cooling add begin between the roller to contact near sheet material shape defect this purpose (in addition, also make thermal load very low, only do not make them under the amount of the being pressed into state of maximum, carry out refrigerative) with proparea cooling roller yet, even with regard to the roller back side cooling in proparea, its amount of cooling water is strengthened, therefore the shower nozzle in proparea is made and to be followed the cooling roller and move, and when rotating with the cooling roller with the structure of the certain spacing distance of its maintenance, thereby the very high refrigerating unit of cooling efficiency in formation proparea.In particular, metal strip on production line is with when this cooling roller begins to contact, make shower nozzle from the retracted position waited for to moving with the approaching direction of metal strip, then, when the amount of the being pressed into ratio of cooling roller rigidly connects when touching when big, make shower nozzle and metal strip keep certain intervals apart from moving like that.In addition, when metal strip does not contact with the cooling roller, this shower nozzle is moved on the above-mentioned retracted position always.On the other hand, just not necessarily required like this for the shower nozzle of back zone, it is also passable to be fixed up.In addition, when this sprinkler design becomes when the cooling roller reaches the maximum amount of being pressed into, with the length of its shower nozzle vis-a-vis be under the longest situation, before or after certain cooling roller can not use, this cooling roller is pressed into quantitative change when shallow, owing to will run into metal strip along with being pressed into shower nozzle that the shallow cooling roller of quantitative change moves or the shower nozzle of fixing at this cooling roller back side, thereby just must make shower nozzle can get back to holding fix.Therefore,, can be designed to when usual cooling, be designed to move to the place of regulation, only move on the above-mentioned retracted position in very or when not carrying out refrigerative and wait for, rather than make it merely and then cool off roller to move for the shower nozzle of back zone.Promptly, metal strip on production line is with when this cooling roller begins to contact, make this shower nozzle from the retracted position waited for to moving with the approaching direction of metal strip, afterwards, even the amount of being pressed into of cooling roller strengthens, and is also no longer mobile, and, before metal strip and this cooling roller disengage, shower nozzle is moved on the above-mentioned retracted position wait for.
As mentioned above, for the uneven temperature of eliminating as the sheet material width that produces shape of a saddle deformation reason distributes, should be in the upstream of the root that this distortion takes place, adopt big amount of cooling water as far as possible, and should carry out to make the even refrigerative of the width back side cooling of sheet material on this upstream end emphasis ground.Therefore, not only will be from the proparea, be that the cooling roller of the upstream side at center begins to adopt successively with being pressed into and strengthens cooling length (promptly strengthening the amount of being pressed into of cooling off roller) particularly with the first cooling roller, and preferably begin to make successively its jet ability to become maximum from the shower nozzle of upstream side to be cooled off, insufficient part can being supplied by the downstream side.And, because adopted the first cooling roller begin to extend the successively method that the cooling roller is pressed into of coiling length, so when requiring speed of cooling to hang down, perhaps owing to the reasons such as thinner thickness of sheet material, require amount of cooling water hour [be thermal load (t/h is low], can strengthen the shower nozzle of the cooling roller back side in downstream side cooling usefulness with the distance of metal strip (, also still can carry out back side cooling) with this shower nozzle even when the cooling roller does not contact.In order to reduce the power loss of this moment, can make the distance between shower nozzle and the cooling roller surpass certain distance, and close the stopping valve that is arranged on the supply air line on the shower nozzle.
On the other hand, having on the roller length direction under the situation of a plurality of shower nozzles, the amount of movement of these shower nozzles on cooling roller travel direction had nothing in common with each other, thereby the interval between each shower nozzle and the cooling roller is had nothing in common with each other on the length direction of roller.This structure can be used for correcting this difference under the differentiated situation of the cooling power on the roller length direction.In addition, when cooling power has when more than needed, can reduce equipment such as employed gas jet, also be effective for saving electric power.
In addition, move directly over focus at the above-mentioned narrow shower nozzle of width of refrigerating unit that makes, make cooling gas in the structure that this focus sprays, under the many situations of sheet material wide variety big on the production line, if the shower nozzle of metal strip both sides does not catch up with this variation roller length direction mobile when changing the sheet material width, the result will produce that can not partly to carry out suitable back side refrigerative to focus new for topic.Therefore, in this structure, at least it is by along a plurality of banded on the roller length direction that the shower nozzle that is positioned at the metal strip two side portions is made its body, when the sheet material width changes, just can remedy slow (reaction is slow) that shower nozzle moves with the cooling gas pressure of the head body that improves close sheet material sidepiece and the method for gas flow.
In particular, shown in Figure 46 (a), near the junction of the different metal strip of sheet material width, leniently sheet material uses the inboard head body α of both sides shower nozzle under the situation that the narrow boards material becomes c, α dOr β c, β aWith central head body α c, α fOr β c, β fWhen such shown in Figure 46 (b), become from the stave material under the situation of wide plate material, then use the outside head body α of both sides shower nozzle a, α fOr β a, β gWith central head body α c, α fOr β c, β f, just can make the inconsistent length of sheet material temperature of metal strip length direction reduce to minimum whereby, and can also prevent the situation of metal strip metal strip wriggling in the heat treatment furnace of this refrigerating unit back and so on whereby.
In addition, if as top said, in the structure that the length direction of roller links together several head body, linking portion be equivalent to have on the partition part position above during said focus, these parts coolings are difficult.The structure of the shower nozzle 1 among the present invention is shown in Figure 47 (a), the head body 10 that couples together further is divided into several sections again on the traffic direction of metal strip, simultaneously, in each section in upstream side and downstream side, staggered on the length direction of roller in the position of each jet hole 11 of head body 10, so, one section median septum position occupied, just become position that jet hole 11 is set thereon in one section or next section, so just solved the problems referred to above.
On the other hand, because separating the appropriate location, the position of the jet hole on each head body is provided with, during the gas ejection is problem not to take place, but this head body several the present invention that link together in this in structure on the roller length direction, if the position of two adjacent jet holes is all in (promptly on the same position of roller length direction) on the same position, be easy to cause turbulent flow from the cooling gas of these two jet hole ejections, just can not effectively cool off.The structure of shower nozzle 1 of the present invention can be shown in Figure 47 (b), the position that is separately positioned on the jet hole 11 on the head body 10 that couples together, be arranged between the adjacent head body 10, and on the direction of metal strip operation, stagger mutually, like this, the position of two adjacent nozzle mouths 11 is just different, solved above-mentioned with inscribing (in addition, if in a shower nozzle, at the roller length direction a plurality of jet holes are arranged, and the adjacent nozzles mouth is designed to stagger on the direction of metal strip operation, and this structure also has same effect).
In addition, before being preferably in above-mentioned cooling roller and metal strip contacting, improve the tension force of metal strip, so as when contact the dimensionally stable of metal strip.
Remedy another kind of structure such as Figure 48 and shown in Figure 49 that above-mentioned shower nozzle moves hysteresis, the back side refrigerative gas quench system that cools off roller and/or below saidly in the assist gas refrigerating unit of this cooling roller outlet side, possessed, have the shower nozzle α that is positioned at the metal strip two side portions at least a, α c, β a, β c, and head body is being divided into (α more than 2 on the metal strip traffic direction A1, α A2, α C1, α C2, β A1, β A2, β C1, β C2), and these shower nozzles all are independently, can be separately move along the length direction (or metal strip width) of roller.And for example shown in Figure 50 (a) and (b), (c) and Figure 51 (a) and (b), (c), before the sheet material width just changes, the shower nozzle (α of both sides, upstream A1, α C1, β A1, β C1) move on the both sides of the metal strip after width changes, and the shower nozzle (α of both sides, downstream A2, α C2, β A2, β C2) (Figure 50 represents when worker's sheet material is changed into narrow sheet material also in the both sides that move to the metal strip after width changes before firm the entering of part that the sheet material width changes, moving of both sides shower nozzle, Figure 51 then represents moving of both sides shower nozzle under the situation in contrast to this).Above structure not only can be used for above-mentioned gas refrigerating unit and radiator cooler, also can be used for the radiator cooler in the inlet side setting of pulley type refrigerating unit.
In addition, possessing under the situation of said structure, setting width change link information device at the inlet side that cools off roller and (cooling off the roller part to arriving at from the production line inlet side, to the information of determining by the metal strip length of pack into order, width, the mensuration of metal strip that is connected with methods such as welding, follow the tracks of and measure, and with the wide variety amount device that transmitted at the mobile message of roller length direction of shower nozzle adaptably); Metal strip both sides position sensor is [by phototube and photosensor, laser apparatus and photosensor, the detector that the metal strip width sheet material thermometer (profilograph distribution temperature meter) that the back that temperature head between being divided by the low-temp. portion on every side beyond high-temperature part on the metal strip and the metal strip is judged will be mentioned constitutes is perhaps united and is used above-mentioned each device]; And more than one devices in these three kinds of devices such as metal strip width sheet material thermometer, wide that draws according to the information of these devices changes part so that the information of width change amount just can be set in the shower nozzle of using at the two ends of metal strip width on the metal strip width two ends.Promptly, when the particular point in the different connection portion of sheet material width enters production line, just the inlet side from production line begins to follow the tracks of this particular point, when becoming the wide plate material, before just will entering, just finished this particular point move (shower nozzle towards mutually from far away method move) of shower nozzle to the predetermined position by the narrow boards material; On the contrary, by the wide plate material when the narrow boards material changes, then at this particular point by after the outlet side, just make above-mentioned shower nozzle begin to move (shower nozzle moves towards direction near each other) to the predetermined position.This is because when sheet material narrows down, do not have the contact position with metal strip on the cooling roller, almost be to produce hot bulging part, and roller part is easy to generate loose contact when the wide plate material of back is come, and the tension force of metal strip is relatively low when becoming the wide plate material, has more increased loose contact.Therefore, under these circumstances,, make shower nozzle move to the place of regulation in advance, just can further make metal strip and the good state that makes contact to of cooling off roller by means of back side cooling in the moment that becomes wide plate.But, taking place at metal strip under the situation of wriggling and so on, these shower nozzles just move to the wriggling direction together.As mentioned above, when the shower nozzle that is arranged on both sides is to go up a plurality of head body to couple together under the situation about constituting along roller length direction (metal strip width), and be divided into more than two on the metal strip traffic direction when the shower nozzle that is arranged on both sides is used in, and under the situation that the head body that can independently move is formed, can both further reduce the abnormal part of cooling that the sheet material width changes part, simultaneously the width of shower nozzle is reduced, so just can alleviate the overcooling degree of peripheral part.
In addition, at thickness of slab, speed or make under all very big condition of sheet material temperature slippage or the like with refrigerating unit, with above-mentioned gas quench system facing to the setting of cooling roller, when also being difficult to eliminate the temperature head of sheet material width, outside the structure of this gas quench system, can also further use assist gas refrigerating unit and gas setting device simultaneously, solve this problem, the structure of above-mentioned assist gas refrigerating unit is to have the facing toward with metal strip of outlet side that is arranged on above-mentioned cooling roller or cooling set of the rolls, the shower nozzle that on the width of this metal strip, has plural jet flow stream to use, and in these shower nozzles, have at least (preferably two, particularly both sides are each one a) shower nozzle to move freely at the width of metal strip.The gas setting device is to adjust the cooling gas pressure of these shower nozzle inside and gas flow.
In addition, under the occasion that is equipped with this assist gas refrigerating unit, shower nozzle moves the structure of hysteresis when remedying above-mentioned sheet material width and change, can be in the shower nozzle of assist gas refrigerating unit, at least the shower nozzle that is positioned at the metal strip both sides is a plurality of head body that couple together on the metal strip width, what at least one shower nozzle can move freely on the metal strip width in these shower nozzles simultaneously; Perhaps, as above-mentioned shown in Figure 49, the shower nozzle that is positioned at the metal strip both sides at least is separated into plural on the metal strip traffic direction, and each self energy of these shower nozzles moves on the metal strip width independently.
Even under above-mentioned occasion, if said width changes the link information device on the inlet side of cooling roller is provided with, in 3 kinds of devices such as metal strip both sides position sensor and metal strip width sheet material thermometer more than one, and obtain according to the information of these devices that width changes part so that the information of width change amount, the shower nozzle that gas quench system is used at the width two ends respectively, be set in the two ends of metal strip width with the assist gas refrigerating unit respectively at two shower nozzles at metal strip width two ends, just can make each shower nozzle move in advance or after entering, move on the preposition accordingly with the entering of special point of the wide different connection portion of plate.
Except above feed forward control, also can carry out feedback control, promptly, metal strip width sheet material thermometer is configured in the cooling outlet side of roller or the outlet side of assist gas refrigerating unit, each shower nozzle of each shower nozzle of gas quench system and/or assist gas refrigerating unit is set in the end of metal strip width respectively according to its information.
And above-mentioned feedback control, also can be when this shower nozzle of control moves, perhaps not with the moving simultaneously of this shower nozzle, according to the information of the sheet material temperature of above-mentioned outlet side, respectively the cooling gas pressure or the gas flow adjustment of each shower nozzle of each shower nozzle of gas quench system and/or assist gas refrigerating unit are implemented.Can add that also two shower nozzles carry out together to the pressure of the cooling gas of the setting of metal strip width both sides and these shower nozzles or the adjustment of gas flow.
On the other hand, as the concrete structure of gas quench system, can adopt have be provided with to the nozzle of metal strip jet flow stream, than the narrow plural shower nozzle of metal strip width; With the device that makes this shower nozzle at the transfer table that moves with the vertical direction of metallic strip surface and/or at this metal strip width.
By means of above-mentioned structure, by transfer table shower nozzle is moved in the scope that temperature distributing disproportionation is spared on the metal strip, and under the condition that keeps the proper spacing distance, shower cooling gas is (if not enough with 2, also can the metal strip width be increased to 3,4 ...), just can control the temperature distribution of this metal strip width.Just can make the uniformity of temperature profile of metal strip width with above-mentioned method, because can further reach the homogenizing of width temperature distribution, so can make speed of cooling even, make the sheet material temperature after the width uniformity of temperature profile approach target temperature, thereby solved problems such as material, shape defect.
Above-mentioned structure certainly is used for metallic coil is carried out the refrigerative roller around more than one inside, make this metal strip carry out roller back side cooling (this moment, the shape of shower nozzle can be made the bending that the curvature with roller adapts) in the refrigerative pulley type refrigerating unit, the inlet side that also can be used for being arranged on this pulley type refrigerating unit is (because at the pulley type refrigerating unit, the cooling of metal strip both sides is not enough and cause the shape of a saddle of above-mentioned metal strip to be out of shape, can be before the pulley type refrigerating unit, be provided with 3 with upper nozzle by such band plate material width, and in these shower nozzles at least the shower nozzle of metal strip both sides be to be used in a plurality of head body that connecting on the metal strip width to form, and the assist gas refrigerating unit that can move freely at the metal strip width and the gas setting device of the cooling gas pressure of adjusting each shower nozzle inside or flow.
53, as claim 51 or 52 described metal strip refrigerating units, it is right to it is characterized in that the shower nozzle that is positioned at the metal strip both sides at this gas quench system and/or assist gas refrigerating unit forms with 3 above head body respectively, wherein outermost showerhead body width B eo satisfies the relation of following numerical expression 4, and wherein, the head body width B ec of central authorities satisfies the relation of following numerical expression 5 and numerical expression 6, and wherein inboard head body width B ei satisfies the relation of following numerical expression 7, and the head body width B c that is positioned at metal strip substantial middle position on the other hand satisfies the relation of following numerical expression 3.
[numerical expression 4]
Beo≥ΔWu/2
In the formula: Wu: the sheet material wide variety amount (mm) of the sheet material width of metal strip connection portion during from narrow broadening
[numerical expression 5]
6≤Bec≤45
T≤1.3mm in the formula
[numerical expression 6]
12t-9.6 in the time of≤Bec≤22t+16.4 cun, cooling load is descended, perhaps when emergency situation, must make the cooling roller be in to wait to keep away back and put.Because the position difference of cooling roller, if the position when making shower nozzle still rest on the cooling roller maximum amount of being pressed into is motionless, will run into], with transfer table make this shower nozzle with the cooling roller mobile cooperate mobile (when whenever all moving when roller and shower nozzle are become one, even above-mentioned cooling roller also has problem beyond the time to be kept away.Promptly, when the production line vertical uplift, the cooling cylinder roller leaves production line and is in state to be kept away, to be in the situation of contact condition also a lot of for shower nozzle on the contrary, therefore, even with the cooling roller mobile cooperate mobile, also to be defined in not with scope that metal strip contacts in), perhaps, make shower nozzle and moving of cooling roller irrelevant and mobile independently (under the independent situation about moving, except avoiding contact as described above, can also keep the highest proper spacing distance of cooling efficiency, can carry out the high-level efficiency cooling with minimum gas volume and do trickle adjustment like that).
As mentioned above, when this structure is used as the assistant cooling structure of pulley type refrigerating unit inlet side setting, it is even at the temperature distributing disproportionation of width to eliminate metal strip before this cooling roller cooling, be cooled to part with the cooling roller in other words into focus, in with cooling roller refrigerative process, preferably distribute (because near uniform temperature as far as possible with cooling roller refrigerative process, the relation of the shape of a saddle distortion of metal strip and the hot bulging of cooling roller, the uneven distribution of occurrence temperature is perhaps encouraged this tendency easily easily).In addition, with this structure during as the structure of the assist gas refrigerating unit that is arranged on pulley type refrigerating unit outlet side, a uneven temperature that produces and encourage distributes in the time of eliminating the cooling of cooling roller with this refrigerating unit effectively, with distribute with the indelible uneven temperature of back side cooling institute, moreover, with said structure during as the structure of the assistant cooling structure of the inlet side of pulley type refrigerating unit and above-mentioned assist gas refrigerating unit, not that the width of shower nozzle 1 at metal strip formed a line abreast, but resembling shown in Figure 53, in some arrangements of staggering a little of the traffic direction of metal X, even sheet material uneven temperature width than the also wide situation of the width of shower nozzle 1 under, also can rely on gas is ejected mutually in the position of each shower nozzle 1 with staggering with arranging, this inhomogeneous part is cooled off comprehensively.
Except that said structure, the structure of this assist gas refrigerating unit can also use following handle parallel with metallic strip surface, and can with the vertical direction of the travel line of this production line on the running gear that moves be arranged on the strip production line, and being installed on this running gear, and be equipped with to the nozzle of metal strip ejection gas, than the also narrow showerhead configurations of the width of metal strip on the direction of production line, have the traveling mechanism that makes the motion of above-mentioned running gear and be arranged on flexible part on the part of above-mentioned gas supply line or the structure of expansion joint.
By means of said structure, if shower nozzle is moved it by running gear in the scope that the metal strip temperature distributing disproportionation is spared, and it is (not enough as one to metal strip shower cooling gas, can the metal strip width be increased to 2,3 ...), the temperature distributing disproportionation that just might eliminate the metal strip width is even.Thus, can make the uniformity of temperature profile of metal strip width, and from reaching the width temperature distribution homogenization, just can seek the homogenizing of speed of cooling, and make on the width uniformly the sheet material temperature, thereby can solve problems such as material, shape defect near target temperature.
In said structure, at least the tow sides at metal strip are equipped with running gear and the shower nozzle that is installed on this running gear respectively, and be arranged on the gas supply pipeline that has flexible part or expansion joint on this shower nozzle, can carry out gas cooling from tow sides.
In addition, above-mentioned structure also can as at this roller refrigerative assistant cooling structure of pulley type refrigerating unit inlet side (before the pulley type refrigerating unit, with this gas cooling cooled metal bands both sides in advance, shape of a saddle distortion is reduced, can improve sheet material uneven temperature degree in the pulley type refrigerating unit).In the thermal cycling of the thin plate continuous annealing that utilizes its flexibility (deep drawn with) shown in for example above-mentioned Figure 52, just can be arranged on said structure from recrystallization temperature and be in the jet refrigerating unit of the pulley type refrigerating unit front and back the process of cooling of aging temperature.
Moreover no matter in these equipment, strip production line is level or vertical, can both be suitable for.
When two above-mentioned shower nozzles are arranged on the metal strip width, shower nozzle is moved on on the two ends of the high metal strip width of temperature with running gear, when 3 shower nozzles were arranged, another moved near the high metal strip central authorities of temperature second, just can carry out the cooling of focus by these shower nozzles.In addition, also can above-mentioned mobile shower nozzle or other stationary nozzle be set at the substantial middle position of metal strip width.
Such metal strip refrigerating unit also is provided in the present invention, it be metal coil tape on the cooling roller more than 1, and the pulley type refrigerating unit that the contact length of above-mentioned metal strip and each cooling roller is adjusted respectively, it has facing to the configuration of above-mentioned cooling roller, at the roller length direction shower nozzle more than 3 is arranged, simultaneously these shower nozzles can move freely on cooling roller travel direction, and the gas quench system that at least wherein has a shower nozzle to move freely at the roller length direction; Metal strip both sides position sensor with the above-mentioned metal strip sheet material side of check; With adjust in the above-mentioned shower nozzle device for moving and adjusting that move of shower nozzle on the roller length direction that can move freely along the roller length direction; With the nozzle position control calculation apparatus of controlling this device for moving and adjusting according to the detection signal of the position sensor of above-mentioned metal strip both sides; Adjust the advance and retreat setting device of the position of above-mentioned shower nozzle on cooling roller travel direction with the position signal of cooling roller; With the outlet side that is arranged on the cooling roller and detect the metal strip width sheet material thermometer of the temperature distribution of above-mentioned metal strip sheet material width; With the temperature signal with this sheet material thermometer, calculation is adjusted the cooling gas pressure of each shower nozzle inside and the sheet material temperature control calculation apparatus of flow corresponding to this temperature deviation then with respect to the temperature deviation of target plate temperature distribution.
In said structure, shower nozzle moving on the roller length direction, be the data that detected according to metal strip both sides position sensor, undertaken by above-mentioned nozzle position control calculation apparatus, this is because the high position of sheet material temperature distribution of metal strip has roughly determined its position at width.But, as mentioned above, if on this metal strip both sides position sensor, use sheet material temperature profile thermometer, also can be the side of the extra high place of sheet material temperature distribution, as the shift position of shower nozzle as metal strip.And in this structure, the detected data of metal strip width sheet material thermometer of the outlet side that is arranged on cooling roller outlet side or the said assist gas refrigerating unit in back are input in the sheet material temperature control calculation apparatus, and it is even to eliminate the sheet material temperature distributing disproportionation by the feedback control that this device is determined, the method of eliminating is basis and the corresponding temperature deviation of target plate temperature distribution, adjusts the cooling gas pressure or the gas flow of each shower nozzle inside.
Above-mentioned target plate temperature distribution can be used predefined temperature distribution, for example (according to circumstances different the average sheet material temperature of two a four/part of metal strip sheet material width, also have get this this temperature high again+α) as the target temperature of sheet material width middle body, perhaps the sheet material temperature of the middle body of actual measurement gained (according to circumstances different, also have and get---20 ℃) than low 0 ℃ of this temperature as the target temperature of sheet material width two side portions.
Have again, in said structure, also can merge the assist gas refrigerating unit of saying above using and (be included at least 2 shower nozzles in these shower nozzles, each 1 shower nozzle of both sides structure that can move freely at the metal strip width particularly) and be configured in the metal strip width sheet material thermometer of this assist gas refrigerating unit outlet side.
On the other hand, the length with respect to the sheet material temperature deviation of the average sheet material temperature of sheet material width part that the metal strip both sides are produced is narrow with the result of above-mentioned numerical expression 11 gained.In addition, with the average sheet material temperature deviation Δ T of following numerical expression 13 defined metal strip both sides, shown in Figure 54,, bigger variation is arranged because cooling width and thickness of slab is different.Therefore, detect the two side portions of metal strip with metal strip both sides position sensor, based on its position signal, with device for moving and adjusting the shower nozzle of both sides, move at (or on metal strip sheet material width) on the roller length direction and to adjust to suitable cooling width, just can make the sheet material temperature deviation reach minimum thus.
[numerical expression 13] ΔT = 1 150 ∫ 0 150 | T ( x ) - Ta | · dx
In the formula: Δ T: the average sheet material temperature deviation on the 150mm of metal strip both sides (℃)
T (X): from the locational sheet material temperature of side Xmm (℃)
Ta: the average sheet material temperature of metal strip width (℃)
X: from the distance of metal strip side.
The cooling width Xe suitable according to Figure 54 can be represented by numerical expression 14 and 15:
[numerical expression 14]
6≤Xe≤45
T＜1.3mm in the formula
[numerical expression 15]
12t-9.6≤Xe≤22t+16.4
t≥1.3mm
Xe in the formula: suitable cooling width (mm)
T: sheet metal thickness (mm)
; when shown in Figure 55; near the tie point of the different metal strip X of sheet material width; in order to shorten the sheet material both sides as far as possible along the unstable cooling さ of party of being of metal strip length direction; and stably pass through in order to make in the heat treatment furnace of metal strip X after this refrigerating unit; know according to experiment, the length of unstable cooling segment is limited within the 0.9Lo of the long Lo of path between the transfer roller of above-mentioned heat treatment furnace.Relation between the nozzle width of the shower nozzle of this moment and sheet material both sides is by following numerical expression 16 expressions.
[numerical expression 16] Xe ≤ Be - ( Δω 2 - 0 . 9 Lo V S )
Be in the formula: the nozzle width of shower nozzle (mm)
Δ ω: the metal strip that passes through earlier and after wide between the metal strip that passes through
Spend poor (mm)
Lo: between the transfer roller of the heat treatment furnace of this refrigerating unit back
Path length (m)
V: the translational speed of both sides shower nozzle (mm/min)
S: line speed (mpm)
Therefore, the nozzle width Be of the shower nozzle of both sides, size by following numerical expression 1 or numerical expression 2 is selected, just the sheet material temperature deviation that produces in the metal strip both sides can be limited in that (sheet metal thickness as metal strip is not a fixed in the minimum extent, its difference is at 1.0mm---and in the time of in the scope of 2.0mm, then determine the width B e of this nozzle) according to maximum sheet metal thickness.[numerical expression 1] 6 ≤ Be - ( Δω 2 - 0 . 9 Lo V S ) ≤ 45
T＜1.3mm[numerical expression 2] 12 t - 9 . 6 ≤ Be - ( Δω 2 - 0 . 9 Lo V S ) ≤ 22 t + 16 . 4 T 〉=1.3mm in the formula
Be: nozzle width (mm)
T: the sheet metal thickness of metal strip (mm)
Δ ω: the variable quantity of metal strip width (mm)
Lo: the path in the heat treatment furnace of refrigerating unit back between the transfer roller is long
Degree (m)
V: the shower nozzle of cooling roller tube length degree direction (or metal strip width) moves
Moving speed (mm/min)
S: line speed (mpm)
That Figure 56 represents is that available technology adopting faces toward with the cooling roller, be provided with on the metal strip width and be separated into several gas injection apparatus and carry out the refrigerative result, with result's of the present invention comparison (of the present invention represent with No.1).Though this figure describes near the sheet material temperature distribution of metal strip side, as can be seen, compared with prior art, the present invention has reached and has reduced overcooled scope, and makes the purpose of temperature distribution homogenization.The experiment condition of this moment is shown in following table 1.
[table 1]
The evenly heat coefficient of conductivity and the shower nozzle of the shower nozzle average angle of the gas quench system that cooling roller faces toward and the gas quench system that cooling roller faces toward and the cooling width of metal tape intersection of the gas quench system that the cooling roller number cooling roller average winding angle of diameter cooling roller that the average sheet material temperature of the average sheet material temperature of the tension force cooling device entrance side cooling device outlet side of metal tape sheet material thickness metal tape sheet material width Negotiation speed metal tape is used and cooling roller face toward 1.3mm 1450mm 248m/min 30.38?MPa 600℃ 350℃ 7 1800mm 112° 390Kcal/m 2H ℃ 99 ° 10mm (the present invention) 250mm (prior art)
Sheet material temperature deviation length partly in the generation of metal strip middle body with respect to sheet material width medial temperature, in the scope shown in Figure 57, the nozzle width Bc of the central shower nozzle separately of the assist gas refrigerating unit that is provided with the cooling gas quench system that faces toward of roller and the outlet of cooling set of the rolls, according to following numerical expression 3 calculate numeral select, the sheet material temperature deviation that sheet material width middle body is produced is limited in the minimum extent, obtains the homogenizing of temperature distribution.
[numerical expression 3]
0.09W≤Bc≤0.27W
Bc in the formula: nozzle width (mm)
W: metal strip width (mm)
In addition, because in most cases, the scope that produces the sheet material temperature deviation all is symmetrical in the medullary ray of metal strip width, so preferably use device for moving and adjusting to adjust the position of nozzle on roller length direction (or metal strip width), make the center of centre portions nozzle consistent with the center of metal strip width.
Prior art and cost of equipment/running expense of the present invention relatively be shown in Figure 58.Because the quantity of having cut down the air quantity and the valve of cooling gas just can be accomplished the reduction of cost of equipment as shown in the drawing/moving commentaries on classics expense.
In said structure, the structure of gas quench system can have 3 with upper nozzle on the roller length direction, wherein at least the shower nozzle of metal strip both sides is made by a plurality of head body and coupled together, and these shower nozzles can be along the roller length direction by moving at the roller length direction.
In said structure, as previously mentioned, in order roughly to determine the high distributing position of sheet material temperature on the metal strip width, said nozzle position control calculation apparatus makes shower nozzle move along the roller length direction according to the data that metal strip both sides position sensor is detected.; when the sheet material wide variety, the shower nozzle of both sides has little time under the situation that the side to metal strip moves, in having the shower nozzle of syndeton; with the cooling gas pressure near the head body the raising sheet material dual-side or the way of gas flow, just can remedy the hysteresis that this shower nozzle moves.And, under the situation of this structure, also can eliminate the uneven distribution of sheet material temperature with the feedback control that the sheet material temperature control calculation apparatus of the detection data of having imported the metal strip width sheet material thermometer that disposes at cooling roller outlet side is determined, it eliminates uneven method is according to the temperature deviation relative with the target plate temperature distribution, adjusts the pressure or the gas flow of the inner cooling gas of each shower nozzle.
Thick at sheet material, under the condition that sheet material temperature slippage in the fast or refrigerating unit of speed is big or the like, the temperature deviation of eliminating the sheet material width facing to the gas quench system of ground configuration with above-mentioned and cooling roller is very under the situation of difficult, can unite the gas setting device that uses the assist gas refrigerating unit and adjust inner cooling gas pressure of each shower nozzle or gas flow and solve this problem.The structure of above-mentioned assist gas refrigerating unit is the shower nozzle that has the jet flow stream more than 3 to use at the metal strip width, and in the middle of these shower nozzles, at least the shower nozzle of metal strip dual-side is to be formed by a plurality of head body that couple together at the metal strip width, and can on the metal strip width, move freely.
Why the structure of above-mentioned assist gas refrigerating unit will link up at the metal strip width making by a plurality of head body at the shower nozzle of metal strip both sides at least in the shower nozzle, and can move freely at the metal strip width, it is identical that its reason and nozzle structure in the gas quench system also are designed to such structure.
Secondly, produce at the metal strip middle body, with respect to the scope of the temperature deviation of sheet material width medial temperature, in the scope shown in above-mentioned Figure 57.If the width B c of the head body of each shower nozzle of the middle body of gas quench system that is provided with facing to ground with the cooling roller and the assist gas refrigerating unit that is arranged on cooling roller outlet side select for use by above-mentioned numerical expression 3 calculate width, and the cooling gas pressure or the gas flow of each shower nozzle inside all adjusted according to the sheet material temperature deviation, just can as top said like that, the sheet material temperature deviation of sheet material width central part branch generation is limited in the degree of minimum.
In addition, when the shower nozzle of the metal strip both sides of these devices was made up of the head body more than 3, the summation size of the width B e of its head body was taken off and is stated size represented in the formula 17, wherein, was positioned at the width B e of the head body in the outside.Select the size of following numerical expression 4 for use, the width B ec that is positioned at the head body of central authorities selects for use the size of following numerical expression 5 and numerical expression 6 (if the sheet metal thickness of metal strip is not certain, at 1.0mm---in the time of in the such scope of 2.0mm, determine the width B ec of this nozzle according to maximum sheet metal thickness), and the width B el that is positioned at inboard head body selects the size of following numerical expression 7 for use, so just can be limited in the sheet material temperature deviation that the metal strip both sides are produced minimum program.
[numerical expression 4]
Beo≥ΔWu/z
Δ Wu: the variable quantity (mm) [numerical expression 5] of metal strip connection portion width sheet material width during by narrow broadening
6≤Bec≤45
T＜1.3mm in the formula
[numerical expression 6]
12t-9.6≤Bec≤22t+16.4
T 〉=1.3mm in the formula
T: the sheet metal thickness of metal strip (mm)
[numerical expression 7]
Bei≥ΔWd/2
Δ Wd: the variation of metal strip connection portion width sheet material width during by wide narrowing down
Amount (mm)
[numerical expression 17]
Be＝Beo+Bec+Bei
The sheet material temperature deviation scope partly with respect to the average sheet material temperature of sheet material width that the metal strip both sides produce is narrow.And by the average sheet material temperature deviation of above-mentioned numerical expression 13 defined metal strip sides Δ T, different along with cooling width and sheet metal thickness have very big variation, shown in top Figure 54.Therefore, the suitable cooling width B ei of the head body of the middle body in the shower nozzle of metal strip both sides, according to above-mentioned numerical expression 5 and 6 set want beguine according to Figure 54 for well.
In addition, in the shower nozzle of metal strip both sides, be positioned at the width B eo of the head body in the outside, and the width B eo that is positioned at inboard head body, as previously mentioned, the hysteresis that the shower nozzle of metal strip both sides moves when changing in order to remedy the metal strip width, their cooling width is determined, all be designed to 1/2 (because divide, yes half) of its sheet material wide variety amount in both sides.
On the other hand, be used in the cooling roller of the roller quenching usefulness of continuous annealing furnace, using the such structure of cooling roller #1 shown in Figure 59.This cooling roller #1, the roller inside of near surface at it is provided with a spiral helicine coolant channel γ, the refrigerant of water coolant and so on flows into from the end of coolant channel γ, make the surface cool of roller, after the metal strip that contacts with the cooling roller surface seized heat, this refrigerant was discharged from the other end.Therefore,, just can obtain very high rate of heat exchange, and this cooling roller has also by the contact length of change and metal strip and just can adjust amount of cooling water or the like advantage easily if good the parameter settings such as flow velocity of this refrigerant.
Generally, the pulley type refrigerating unit uses #1---many cooling rollers of #7 shown in Figure 60, the tow sides of metal strip are alternately contacted with these rollers, cools off fast.Coolant channel γ each cooling roller of a cross-flow quench roller #1 from this equipment---#7 infeeds refrigerant, and the refrigerant after temperature improves reclaims from opposite side, delivers in the coolant heat exchanger, utilizes after being cooled there again.
At cooling roller #1---on the metal strip X after being cooled on the #7, the W shape temperature distributing disproportionation that all produces on its width as shown in figure 43 is even usually.Think all that generally this is that the cooling roller is when being subjected to tensile metal strip X and being pressed in the production line direction, because the both sides of this metal strip X are upturned, the phenomenon that has produced above-mentioned shape of a saddle distortion and taken place in order to eliminate the used solution of this phenomenon, was narrated before this.By means of above-mentioned these structures of the present invention, can impel said temperature elimination pockety really, but can not eliminate fully, but shown in Figure 61, make the temperature deviation Δ t of dual-side 1Temperature deviation Δ t with two 1/4th location 2Increased, the even state of temperature distributing disproportionation becomes asymmetric on the contrary at the width of metal strip X, when this situation is very remarkable, the overcooling that can cause owing to the tension force in the pulley type refrigerating unit makes metal strip X produce uneven extension shape, this makes the wriggling that causes metal strip X in follow-up heat treatment furnace, and makes the material of this metal strip X inhomogeneous.
In view of the above-mentioned problems, proposed when carrying out the cooling of metal strip, the uneven cooling roller of material of metal and the pulley type refrigerating unit of this cooling roller of use more can not take place by above-mentioned metal strip refrigerating unit.
That is, as coolant channel being arranged, and contact with metal strip and make the structure of the cooling roller of this metal cools preferably be used in the coolant channel that many cooling rollers are set on the same plane with the surface in inside.
In addition, on the strip production line direction, be provided with a plurality of cooling rollers, and, make the flow of coolant direction in coolant channel of each cooling roller on each, supply with refrigerant successively mutually on the contrary with its surface and metallic contact and making in this metal strip refrigerative pulley type refrigerating unit structure.
As mentioned above, common cooling roller only is provided with 1 coolant channel in the circumferential surface inside of roller, so the refrigerant very low in the inlet side temperature of this path carries out heat exchange continuously with metal strip in roller internal freedom process of flowing, and at outlet side, heat-shift has been in roughly saturated state, if water has then reached the ebullient state of wanting at once.At above-mentioned situation, in said structure, owing to be provided with many coolant channel at grade, just can shorten with the length of the corresponding coolant channel of amount of cooling water of necessity, and the heat exchange amount of the refrigerant that flows through in every coolant channel also can reduce.Even consequently near the roller surface metal strip on gas of the side each bar coolant channel outlet side also can be cooled off fully, the temperature distribution of width also becomes symmetric state in cooled metal strip.
Arranging on the strip production line direction under the situation of a plurality of cooling rollers, refrigerant all is to supply with from the same side and the pulley type refrigerating unit of the sort of structure in the past of discharging from opposite side on that cooling roller, near the cooling roller end surface of coolant channel inlet side with near the thermograde between the cooling roller end surface of its outlet side, on each cooling roller, all produce towards same direction.Relative therewith, in second kind of said structure, because flow of coolant direction in the cooling channel of each cooling roller is supplied with on each roller successively on the contrary, so the said temperature gradient is opposite in each cooling roller, and reduce gradually, therefore in the cooling roller of back zone, this thermograde is just died away.
On the other hand, it is bigger to the invention allows for size range, just makes metal strip width sheet material temperature distribution approach the target plate temperature distribution with very cheap running expense, and refrigerative method of cooling fast.
Promptly, the method of cooling that goes out mentioned herein is such, metal coil tape on more than one cooling roller, adjust then in the metal strip method of cooling of contact length of above-mentioned metal strip and each cooling roller, use sets vis-a-vis by metal strip and above-mentioned cooling roller, can move along the cooling travel direction of roller and roller length direction, be provided with the gas quench system of the shower nozzle narrower than the width of metal strip, eject cooling gas from this shower nozzle metal strip is carried out back side refrigerative simultaneously, deviation in cooling between the target plate temperature of basis and metal strip, adjust the sheet material temperature of middle body by the contact length of adjusting metal strip and cooling roller, adjust on one side the spacing between metal strip and this shower nozzle from the position of the position of adjusting the cooling roller and shower nozzle, on one side at least one side is constantly being monitored the temperature distribution of metal strip width in the inlet side of this cooling roller and outlet side, this shower nozzle moved to this place and above-mentioned target plate temperature distribution do not had on the position of temperature deviation, thus according to the temperature distribution of the deviation control sheet material of target plate temperature distribution.
The width that above-mentioned W shape uneven temperature is distributed in the focus that central authorities and both sides causes is very narrow, Japanese patent gazette spy opens clear 60---and No. 169524 disclosed existing structures are difficult to this part is effectively cooled off, and in said structure, because the shower nozzle of the narrow width of gas quench system is moved directly over focus, make cooling gas blow to focus, thus this part is carried out the concentrated area cooling, thereby it is even to eliminate temperature distributing disproportionation effectively.At this moment, for the thermal treatment that metal strip is stipulated, the target plate temperature of setting and the sheet material temperature of metal strip middle body are compared,, adjusted the sheet material temperature of middle body according to this sheet material temperature deviation with adjusting the method for metal strip with the contact length of cooling roller.
When shower nozzle comes the back side of metal strip cooled off facing to the metal strip shower cooling gas that touches with the cooling roller socket joint, on one side adjust spacing between metal strip and this shower nozzle by the position of the position of adjusting the cooling roller and shower nozzle, at least one side in the inlet side of this cooling roller and outlet side on one side, constantly monitoring the temperature distribution of metal strip width, this shower nozzle moved to make this place and target plate temperature distribution (this target plate temperature distribution, both can be with predefined, also can be outside the target temperature of sheet material width middle body, survey the sheet material temperature of middle body, perhaps low 0 ℃ than this temperature---20 ℃ temperature is as the target temperature of sheet material width both sides, come to determine the target plate temperature distribution in view of the above) between do not have on the position of temperature deviation, thus the sheet material temperature distribution is controlled (that is, making temperature distribution homogenization).
Control about this sheet material temperature distribution, except above-mentioned going up the mobile shower nozzle at roller length direction (metal strip width), also can adjust the pressure or the gas flow of the cooling gas of shower nozzle inside according to temperature deviation, merge to use and carry out control to the method for metal strip shower cooling gas.
On the other hand, above-mentioned shower nozzle on the travel direction of cooling roller the structure that moves freely as precondition, be because the cooling roller is in order to change contact length, want can with the vertical direction of Metal Production line on move, be fit to roller back side refrigerative apart from last so above-mentioned shower nozzle often is in, and this shower nozzle is not contacted with metal strip.
In addition, when shower nozzle during number is set is 2 of roller length direction, according to the deviation of target plate temperature distribution with the control of sheet material temperature distribution move relatively two shower nozzles be with the metal strip two side portions on the temperature deviation of target plate temperature distribution be object, shower nozzle moved to make on the position that deviation disappears.The sheet material temperature distributing disproportionation of above-mentioned W shape is even, and the temperature of its both sides is usually than middle body height, so shower nozzle preferentially carries out to moving of both sides.
In contrast, the typical temperature of the focus of middle body is except than both sides low, and when the sheet material width of metal strip changed, the position of focus almost was constant.Therefore, toply be provided with the shower nozzle of both sides said,, can also shower nozzle be set in addition at the middle body of sheet material width in order to eliminate the inhomogeneous of temperature distribution except resembling.At this moment, shower nozzle only moves on cooling roller travel direction, does not move at the roller length direction.About the sheet material temperature distribution control of basis, also only in the shower nozzle of this middle body, according to the pressure or the gas flow of the inner cooling gas of temperature deviation adjustment shower nozzle, to metal strip shower cooling gas with the deviation of target plate temperature distribution.
Much less, the present invention is not a structure of having only a cooling roller, can be applicable to the structure of cooling roller more than 2 yet.When a plurality of cooling roller, as mentioned above, at least to wherein initial cooling roller, preferably be provided with the above-mentioned shower nozzle collocating structure of 3 shower nozzles, can also cool off roller to these and be divided into two sections in proparea and back zone, the cooling roller in proparea is provided with 3 shower nozzles, the configuration of its shower nozzle as mentioned above, cooling roller to the back zone then is provided with 2 shower nozzles, and the configuration of its shower nozzle is identical with the distributing style of above-mentioned two shower nozzles.As mentioned above, initial at least cooling roller or the cooling roller in proparea adopted the reason of the structure that 3 shower nozzles are arranged is identical with the reason of top theory.When the cooling roller begins to contact, if the central part of metal strip has been divided into " central uplift ", it is even to produce temperature distributing disproportionation, because the characteristic of cooling roller, in case uneven temperature distribution has taken place, after this inhomogeneous of temperature distribution will increase, so in order to make sheet material and the initial stage that the cooling roller begins to contact not produce shape defect, at least at middle body shower nozzle is set also to initial cooling roller or to the cooling roller in proparea, by spraying cooling gas, solve the problem of " central uplift " to the concentrated cooling of this part with from the back side.On the contrary, if for the cooling roller in initial cooling roller or proparea 3 shower nozzles that comprise central shower nozzle will be set at least, on the follow-up cooling roller so afterwards, it is just much of that a shower nozzle is respectively established in the both sides of metal strip.
Under the above-mentioned situation that a plurality of cooling rollers are set, can be the same with the move mode of the shower nozzle of top theory, the shower nozzle in proparea to cooling roller travel direction move and the move mode of the shower nozzle of back zone can design differently.Promptly, shower nozzle for the proparea, it can be with cooling off moving of roller, and follow mobile with it with maintaining a certain distance, and, when usual cooling, make it move to the place of regulation for the shower nozzle of back zone, only in the eventuality or when not cooling off, make it on above-mentioned retracted position, wait to keep away, can not follow the cooling roller and move.
For the non-uniform temperature of eliminating as the sheet material width that produces above-mentioned shape of a saddle distortion reason distributes, the same with top theory, not only will be with the cooling roller in the proparea, to be the center particularly with the 1st cooling roller, begin successively by being pressed into from the cooling roller of upstream side, get big cooling length, and will begin to make successively its gas injection ability with maximum to cool off from the shower nozzle of upstream side, insufficient part then can remedying by the downstream side.
Adopting and when the cooling roller back side is cooled off, also can average the sheet material temperature controlling to above-mentioned 3 focuses as object at the travel direction of cooling roller and the shower nozzle more than 3 that the roller length direction moves.Be to carry out this control with the contact length of cooling roller at this moment to adjust metal strip, as the shower nozzle of the gas quench system that is provided with facing to each cooling roller ground corresponding to being wound on the track that cools off the metal strip on the roller, suitable with its maintenance on one side spacing, adjust the position of shower nozzle on one side, this is effective aspect heat transfer.As to make the spacing between shower nozzle and the metal strip be 5---50mm, this moves the precision of adjustment, also is effective for the metal strip that prevents to take place shape defect (for example edge wave shape wave) with contacting of shower nozzle for each of cooling roller and shower nozzle.
In addition, carrying out the above-mentioned temperature controlled while of average sheet material, also according to the deviation of target plate temperature distribution, carry out the control of sheet material temperature.At this moment, move with shower nozzle that to adjust the cooling width just very important.Metal strip adopts steel band, and cooling experiment of carrying out with the cooling roller and the structure of analyzing show that the average sheet material temperature deviation that the steel band both sides that define with above-mentioned numerical expression 13 are produced has very big variation with cooling off width and thickness of slab shown in above-mentioned Figure 54.This is with aforesaid the same.Therefore, when adjusting spacing between metal strip and this shower nozzle by the position of cooling position of roller and shower nozzle, on at least one side of this cooling inlet side of roller and outlet side, often monitor the position of metal strip both sides, and by means of the position of the shower nozzle that moves the both sides of adjusting each gas quench system with respect to the metal strip both sides, make it have cooling width shown in following formula 8 and 9, just can make sheet material temperature deviation minimum.
[numerical expression 8]
6≤W E≤45
T＜1.3mm in the formula
[numerical expression 9]
12t-9.6≤W E≤22t+16.4
T 〉=1.3mm in the formula
W R: the cooling width (mm) of both sides shower nozzle
T: the sheet metal thickness of metal strip (mm)
In most of the cases, the scope that the metal strip middle body produces the sheet material temperature deviation is symmetrical in the medullary ray of metal strip width, so it is consistent with the center of metal strip width that the center of the shower nozzle of middle body is moved to.In addition, the scope of sheet material temperature deviation is with respect to the scope shown in the numerical expression 10 of metal strip width shown in Figure 57, preferably makes this part cooling.
[numerical expression 10]
0.09B≤W c≤0.27B
W c: the cooling width (mm) of middle body shower nozzle
B: the width of metal strip (mm)
According to above-mentioned, when adjusting the cooling width by moving of shower nozzle, often monitoring the sheet material temperature distribution of metal strip width at cooling roller outlet side, according to the deviation of target plate temperature distribution, after the cooling gas pressure of these shower nozzle inside and gas flow adjusted, to metal strip shower cooling gas, it is even just to eliminate the sheet material temperature distributing disproportionation.In addition, above-mentioned structure can also be applicable to when using carries out the refrigerative gas quench system to the roller back side and can not eliminate the sheet material temperature distributing disproportionation when even, and the occasion of assist gas device for cooling (shower nozzle that can move on the metal strip width more than 3 is arranged on the pros and cons at metal strip respectively) is set at the outlet side of cooling roller.
In addition, for with as metal strip shape defect and so on reason, owing to and each cooling roller socket joint touch the inhomogeneous generation of following, in the sheet material variation in temperature distribution of metal strip width accordingly, outlet side at the cooling roller, often monitoring the sheet material temperature distribution of metal strip width, obtain the position of centre of gravity of temperature deviation in side and middle body produce with respect to the temperature deviation scope of target plate temperature respectively, the mobile gas refrigerating unit, the perhaps shower nozzle of this gas quench system and assist gas refrigerating unit both sides, make the cooling width of both sides reach 2 times of distance from the metal strip side to this position of centre of gravity, and the shower nozzle of mobile middle body, make its central position consistent with above-mentioned position of centre of gravity at the metal strip middle body, then from these shower nozzles to metal strip shower cooling gas, also can solve the above problems thus.
Like this, with respect to the target plate temperature, obtain the position of centre of gravity of sheet material temperature deviation in the scope of generation sheet material temperature deviation of metal strip side and middle body respectively, under the occasion of the position of each shower nozzle of mobile adjustment gas quench system and assist gas refrigerating unit, for example the shower nozzle with side is that example illustrates, just can under the condition of above-mentioned table 1, make the temperature distribution homogenization as No.2 curve among Figure 56.
Fig. 1 is the synoptic diagram of continuous annealing furnace production line structure of the metal strip X of the pulley type refrigerating unit of expression with example structure that metal strip refrigerating unit of the present invention is being set.Fig. 2 is the explanatory view of the metal strip refrigerating unit of the embodiment that puts down in writing of claim 48.Fig. 3 is the stereographic map facing to the gas quench system of cooling roller setting.Fig. 4 is arranged on the stereographic map of the assist gas refrigerating unit of the outlet side that cools off set of the rolls.Fig. 5 is the stereographic map of expression facing to the gas quench system of being put down in writing in the claim 51 of cooling off the roller setting.Fig. 6 is arranged on the stereographic map of assist gas refrigerating unit of the foregoing description of the outlet side of cooling set of the rolls.Fig. 7 is the structural representation that the gas quench system in the application's the claim 32 is arranged on the 3rd embodiment that uses in the roller back side cooling structure on the pulley type refrigerating unit of metal strip continuous annealing furnace.Fig. 8 is the partial enlarged drawing of the roller back side cooling structure of present embodiment.Fig. 9 is the explanatory view of structure of the transfer table of expression present embodiment.Figure 10 be expression the shower nozzle of middle body to the left and right direction gas quench system that move, that put down in writing in the claim 33 be used in the top view of another embodiment in the cooling structure of the roller back side.Figure 11 is the sectional drawing that is illustrated in the roller back side cooling structure on the metal strip edge.Figure 12 is the sectional drawing that is illustrated in the roller back side cooling structure of metal strip middle body.Figure 13 be expression the gas quench system of record in the claim 34 as roller back side cooling structure, be used for the synoptic diagram of the example structure of the pulley type refrigerating unit on the strip production line of level.Figure 14 is the part cross-sectional view of last figure #1 cooling roller.Figure 15 is the partial enlarged drawing that expression makes the structure that the transfer table left and right directions in the present embodiment moves.Figure 16 is the sectional drawing that expression makes the structure that the transfer table left and right directions in the foregoing description moves.Figure 17 is the orthographic plan of the embodiment 4 of the assist gas refrigerating unit of record in the claim 41.Figure 18 is the side-view of the assist gas refrigerating unit of present embodiment.Figure 19 is that the walking carriage of shower nozzle and the explanatory view of guide rail mated condition are equipped with in expression.Figure 20 is the wheel of expression top walking carriage and the enlarged view of guide rail mated condition.Figure 21 is the wheel of expression lower running chassis and the enlarged view of guide rail mated condition.Figure 22 is the explanatory view of the synchronized drive structure of expression travel mechanism.Figure 23 is the explanatory view of the synchronized drive structure of expression top walking carriage and lower running chassis equally.Figure 24 is the explanatory view that the pipeline structure that shower nozzle moves is being followed in expression in the present embodiment.Figure 25 is the sectional drawing of the structure of expression telescopic joint.Figure 26 is that expression is applicable to that strip production line is in the top view of the said structure section on the pulley type refrigerating unit under the horizontal state.Figure 27 is the side-view of this example structure.Figure 28 is the wheel of walking carriage on inlet side top of this embodiment of expression and the explanatory view of guide rail mated condition.Figure 29 is the wheel of walking carriage on outlet side top of this embodiment of expression and the explanatory view of guide rail mated condition.Figure 30 is the wheel of inlet side lower running chassis of this embodiment of expression and the explanatory view of guide rail mated condition.Figure 31 is the wheel of this embodiment outlet side lower running chassis of expression and the explanatory view of guide rail mated condition.Figure 32 is the sectional drawing that expression is used in the section structure of the cooling roller in the pulley type refrigerating unit.Figure 33 is the stretch-out view of this cooling roller deployed condition of expression.Figure 34 is the water passage system explanatory view that leads to water coolant in this pulley type refrigerating unit of expression to the cooling roller.Figure 35 is the expression metal strip---cooling between the roller surface thermal conductivity and the water coolant flow velocity between the graphic representation that concerns.Figure 36 is the graphic representation that concerns between the pressure-losses of expression flow velocity of water coolant and pump.Figure 37 is speed of cooling CR (J), average cooling rate ACR, the average comprehensive thermal absorptivity AV of each cooling roller of representing respectively to cool off Calculation of Heat Transfer on the roller, following.The schema of computation program.Figure 38 be expression be wound on two on the cooling roller metal strip and the shower nozzle of gas quench system between the explanatory view that concerns.Figure 39 is the sheet material temperature distributing curve diagram of expression gas quench system outlet side.Figure 40 is the refrigerating unit side-view of metal strip of an embodiment of expression prior art.Figure 41 is the stereographic map that is illustrated in the structure of gas injection shower nozzle used in this structure.Figure 42 is the graphic representation that sheet material width sheet material temperature distribution when cooling off the roller cooling is only used in expression.Figure 43 is when representing that metal coil tape is on the cooling roller, the stereographic map of the deformation state of metal strip.Figure 44 is the sectional drawing that expression is arranged on an example of the jet hole shape on the shower nozzle.Figure 45 is illustrated in the explanatory view that " central uplift " situation takes place the metal strip middle body.Figure 46 is near the explanatory view of the setting of the side shower nozzle in the metal strip connection portion of expression different in width.Figure 47 is the explanatory view that expression is positioned at the structure of the shower nozzle on the metal strip side.Figure 48 is the stereographic map that the state of shower nozzle after separating on the metal strip traffic direction of refrigerative gas quench system both sides, the roller back side carried out in expression.Figure 49 is the stereographic map of the state of shower nozzle after separating on the metal strip traffic direction of the assist gas refrigerating unit both sides of the expression outlet side that is provided in the pulley type refrigerating unit.Figure 50 is the width of expression sheet material during by narrow broadening, the explanatory view of the mobile status of separating spray nozzle.Figure 51 is that the width of expression sheet material separates the explanatory view of the mobile status of shower nozzle during by wide narrowing down.Figure 52 is the steel sheet continuous annealing thermal cycling curve figure of the soft usefulness of expression.Figure 53 is with under the situation of this structure as the assistant cooling structure of the inlet side of pulley type refrigerating unit or outlet side, the explanatory view of the shower nozzle example that each shower nozzle is slightly arranged with staggering on the metal strip traffic direction.Figure 54 is the cooling width of expression sheet material both sides and near the graph of relation of the temperature deviation the sheet material side.Figure 55 is the nozzle location of shower nozzle of the gas quench system of metal strip when being connected with metal strip of expression different in width and the mode chart that the relation of width is cooled off in the sheet material both sides.The sheet material temperature distributing curve diagram that Figure 56 is expression when facing to the gas quench system of cooling roller ground setting the lateral section of metal strip being cooled off.Figure 57 is the sheet material temperature deviation of expression sheet material middle body and the graphic representation of its scope.Figure 58 is expression the present invention and the operational cost of prior art and the graphic representation relatively of installation cost.Figure 59 is the prior art constructions figure that expression is used in the cooling roller that the pulley type of continuous annealing furnace quenches.Figure 60 represents to use altogether 7 above-mentioned cooling rollers, and they are alternately contacted with the tow sides of metal strip, carries out the synoptic diagram of the structure of quick refrigerative pulley type refrigerating unit.Figure 61 is illustrated in the graphic representation that the even state of temperature distributing disproportionation on the width of metal strip becomes asymmetric state.
[embodiment 1]
The structure of an embodiment of metal strip refrigerating unit of the present invention is described with reference to Fig. 1 to Fig. 4.
Fig. 1 is the synoptic diagram of structure of the continuous annealing furnace production line of the metal strip X of expression with pulley type refrigerating unit, and this pulley type refrigerating unit is provided with the structure of an embodiment of metal strip refrigerating unit.
In the structure of present embodiment, the metal strip loose winding, and after having one's hair trimmed with the guillotine cutter 2001 of inlet side, the roll coil of strip of the roll coil of strip of front and back is coupled together by welding machine 2002 by draw drum 2000.Then, on the cleaning equipment 2003 of inlet side, after the electrolytic degreasing, arrive the kink 2005 of inlet side through the stretch flattener of using as sheet material shape correction machine 2004.Be fed to then in preheating oven 2006 and the direct flame-type reduction process furnace, be warming up to 600 ℃---750 ℃, be heated to after the specified temperature by radiation tubular oven 2008 and radiation tubular type soaking pit 2009 again, soaking under this temperature, after in jet cooling zone 2010, being cooled to about 600 ℃, further in pulley type refrigerating unit 1000, be cooled to 350 ℃ again.Then, through having a heating---the conduct of refrigerating function is adjusted cooling apparatus and the overaging treatment zone 2011 that is provided with and cool furnace 2012 fast, carry out water-cooled and drying with water cooling equipment 2013 and drying plant 2014, pass through again after the outlet side kink 2015, on modified milling train 2016, plate surface is carried out modifier treatment, check and oiling by surface imperfection (detector) 2017 and oiler 2018, on outlet side guillotine cutter 2019, cut off into after the length of regulation, batch with pulling reel 2020.
In said structure, stretch flattener 2004 is arranged on the front of direct flame-type reduction process furnace 2007, below, the reason of this setting is illustrated.At first, the problem of oxidation takes place in metal strip X in direct flame-type reduction process furnace 2007, does not also check on for the mechanism of this oxidation, and the inventor thinks like this.That is, in the combustion flame that directly flame-type forms in reducing process furnace 2007, the scope that is suitable for metal strip X reduction heating is limited, if not flame is contacted with metal strip X, so not only can not reduce, and oxidation takes place on the contrary.On the other hand, for one of process or twice in directly flame-type reduces process furnace 2007 just reach the reductive purpose, the interval that is arranged on the roller up and down in the stove at least must be more than 20m, like this, shaft is just long, at metal strip X during, can between roller, produce the bump of rattling away of rattling away by so long shaft.In addition, the shape of metal strip X often produces the concavo-convex or middle elongation of middle body, and bad shape such as wrinkle on the side, the ratio (this ratio represents to be out of shape violent degree) of partly floating the metal strip deflection a of the degree of coming and metal strip width W when expression metal strip X Section Central is when a/W becomes big, and it is remarkable that this shape defect just becomes.At this moment, if the interval between the roller up and down that is contained in the stove has at least more than the 20m, except above-mentioned rattle away the bump of rattling away because the pressure of flame when being subjected to burning, very big bending will take place in metal strip X.When metal strip X has very greatly when crooked, just make metal strip X in the above-mentioned suitable scope of combustion flame, not contacted, so just the problem of selective oxidation has taken place with combustion flame.
On the other hand, in jet cooling zone 2010, can produce the problem that section shrinks, and the even problem of inhomogeneous cooling can take place in pulley type refrigerating unit 1000, can think that these problems equally also are the reasons of the shape defect of metal strip X.At these about the bad reason of metal strip X-shaped shape, as you know, if applying under certain tensile state with direct flame rapid heating furnace, under the condition of heating metal strip equably of not clashing into, just can correct this shape defect, perhaps eliminate the new shape defect that produces because heating is inhomogeneous.; for some local elongation that takes place at metal strip X width; in any case but do not correct; if make sheet material pass through jet cooling zone 2010 like this; section will take place in the cooling zone to be shunk; in addition; in the time of in being transported to pulley type refrigerating unit 1000; the part of this elongation can not fully contact with the cooling roller surface; even be not contact condition; so just be difficult to make the uniformity of temperature profile of last cooling sheet material width afterwards, can expect, problems such as the not even section contraction of quality, wriggling will take place along the sheet material width.
Moreover, in radiation tubular oven, soaking pit 2008 and 2009, the problem that radiator tube contacts with metal strip X can take place, in quick cool furnace 2012, the problem that air nozzle contacts with metal strip X similarly can take place.These problems also are the bad reasons of metal strip X-shaped shape, and a particularly back problem can become the safety fuse that shape defects such as section contraction take place in growth encourage in jet cooling zone 2010 and pulley type refrigerating unit 1000.
The inventor thinks, above these are former thereby when the problems referred to above take place owing to have, be provided with in the front of these Equipment for Heating Processing so the shape of this metal strip X is carried out corrigent stretch flattener 2004, again the metal strip X that was corrected by it after the shape is carried out various thermal treatments, these problems just can solve.Therefore, this point can be clearer and more definite, promptly, if adopt direct flame rapid heating metal strip not to be had the even heating of collision, in view of it has above-mentioned this fact of the effect of improving shape defect, as a reference, when metal strip X is carried out shape correction with this, carry out the corrigent words of a metal strip shape in the front of direct flame-type reduction process furnace 2007, said variety of issue above on follow-up equipment, can not taking place again.More than be exactly in the present embodiment, the reason of stretch flattener 2004 is set in the front of direct flame-type reduction process furnace 2007.
But, if only in pulley type refrigerating unit 1000, carry out once such shape correction, it is the temperature distribution homogenization that is difficult to reach metal strip X width, so as shown in Figure 2, merging ground in the structure of present embodiment uses from cooling roller #1---shower nozzle α 1 of the back side ejected coolant of the contiguous metal strip X of #4---α 4 back side of cooling roller being cooled off.Fig. 2 is the synoptic diagram of seeing from the side of the metal strip refrigerating unit of the described embodiment of claim 48.Refrigerative metal strip X applies tension force by the bridle rolls ε 1～ε 3 and ε 4～ε 6 that are arranged on metal strip refrigerating unit front and back to the metal strip X that is in this refrigerating unit gradually after heating and soaking.
In the preparatory stage of starting, by before touching, change the tension force of this metal strip X at metal strip X and cooling roller by above-mentioned bridle rolls ε 1～ε 6, the use tension force (more than 29.4 MPa) that always reaches the cooling roller is so that dimensionally stable in the contact process.Move each cooling roller #1～#4 then in the horizontal direction, it is contacted with metal strip X, Yi Bian adjust its amount of being pressed into (contact length) again, Yi Bian adjust amount of cooling water.Owing in this pulley type refrigerating unit, on the metal strip width, produce uneven temperature distribution easily, and in order not make the situation of the such uneven temperature distribution that in the jet cooling zone 2010 of its front, produces, in the pulley type refrigerating unit, obtain encouraging, so use the structure of following said metal strip refrigerating unit in the present embodiment, the back side of cooling roller cooled off.
In the structure of present embodiment, has following various device: by 3 shower nozzle α 1 that form 1 group---the gas quench system of α 4; Be arranged near the metal strip both sides position sensor 89 of metal strip refrigerating unit inlet side; On the roller length direction, move device for moving and adjusting 82a---the 82d that adjusts above-mentioned these shower nozzles respectively; The nozzle position control calculation apparatus 88 of the above-mentioned device for moving and adjusting 82a of detection signal control according to metal strip both sides position sensor 89---82d; According to from each cooling roller #1---position of #4 and cooling roller socket joint touch length adjuster 80a---signal that 80d sends,---advance and retreat setting device 81a of the position of α 4 on the moving direction of the cooling roller---81d that adjusts above-mentioned jet head sets α 1; Be arranged in the outlet side of cooling set of the rolls, detect the sheet material thermometer 90a of the temperature distribution of metal strip width; According to the temperature signal that sends from this sheet material thermometer 90a, to the pressure regulator valve 84a of above-mentioned gas refrigerating unit---the sheet material temperature control calculation apparatus 87 that at least a parameter in the rotating speed of the aperture of 84d or the gas blower 85a of supply gas is controlled.
In said structure, nozzle position control calculation apparatus 88 is according to putting the signal that detector 88 sends from above-mentioned metal strip two locations, in---each shower nozzle of α 4 is delivered to device for moving and adjusting 82a in the position control instruction of roller length direction---82d to above-mentioned jet head sets α 1.Thereby the shower nozzle of both sides moved adjust to the corresponding position of metal strip sidepiece, adjust to the corresponding position of metal strip middle body and the shower nozzle of central authorities moved.
On the other hand, about cooling roller #1---the adjustment of #4 and metal strip contact length, be according to being arranged on pulley type refrigerating unit outlet side, can detect the temperature signal that the sheet material thermometer 90a of the temperature distribution of sheet material width sends, obtain the temperature of sheet material width middle body by sheet material temperature control calculation apparatus 87, by sheet material temperature control calculation apparatus 87 the sheet material temperature of above-mentioned middle body and the target plate temperature of setting for the thermal treatment of metal strip X being implemented be scheduled to are compared again, then from this sheet material temperature control calculation apparatus 87, corresponding to the deviation of relatively coming out, touching length side engagement positions 80a to the cooling roller socket joint---80d sends signal, adjust contact length (in addition, also can make the temperature signal that sends according to from sheet material thermometer 90a, obtain the medial temperature of sheet material width by sheet material temperature control calculation apparatus 87, by sheet material temperature control calculation apparatus 87 above-mentioned medial temperature and the target temperature of setting for metal strip X is implemented predetermined thermal treatment are compared again, corresponding to this deviation, touch length adjuster 80a to the cooling roller socket joint then from sheet material temperature control calculation apparatus 87---80d sends signal).
Moreover, in the structure of present embodiment, by means of having imported from the sheet material temperature control calculation apparatus 87 of the temperature signal of sheet material thermometer 90a output, obtain the target temperature of width middle body from the average sheet material temperature of two a four/part, obtain the target temperature of sheet material both sides again from the mensuration temperature of middle body, and obtain the observed temperature of sheet material both sides and middle body, then the target temperature of they and above-mentioned sheet material width is compared.Then, corresponding deviation, sheet material temperature control calculation apparatus 87 uses the revolution control of the gas blower 85a of supply gas, the aperture of perhaps pressure regulator valve 84a---84d is adjusted in these two kinds of methods at least a, adjusts the pressure (having omitted pressure warning unit) of the inner cooling gas of each shower nozzle.With above inflation method, by the jet head sets α 1---both sides and the middle body of the gas cooling metal strip X that α 4 ejects that are provided with facing to the cooling roller.
Jet head sets α 1---and α 4,---position of #4 and from the contact length setting device 80a of cooling roller---signal that 80d sends according to cooling roller #1, by above-mentioned advance and retreat setting device 81a---81d adjusts its position on cooling roller travel direction.But as cooling roller #1---when #4 is on the position that contact maximum length with metal strip, also can be fixed on above-mentioned jet head sets α 3 and α 4 and can guarantees between metal strip and the jet head sets apart from the suitable position.
Except these structures, also be equipped with the assist gas refrigerating unit at cooling set of the rolls outlet side in the present embodiment, even had above-mentioned refrigerating unit structure also to be difficult to overcome fully to eliminate, the temperature deviation of metal strip X width.Promptly, export neighbouring by means of being arranged on this assist gas refrigerating unit, can detect the sheet material thermometer 90b of temperature distribution of sheet material width and the temperature signal that sends from it, in the temperature of the temperature of obtaining the sheet material both sides by sheet material temperature control calculation apparatus 87 and central authorities, it is compared with the above-mentioned target temperature of sheet material width, then corresponding to this deviation, at least a in these two kinds of methods of aperture of the rotating speed of the gas blower 85b of utilization control supply gas or adjustment pressure regulator valve 84e, the pressure of the inner cooling gas of each shower nozzle is adjusted.From the jet head sets β 1 of above-mentioned and the oppositely-arranged assist gas refrigerating unit of metal strip X and β 2, eject cooling gas then, both sides and the middle body of the metal strip X by the pulley type refrigerating unit cooled off.
Then, by the nozzle position control calculation apparatus 88 of accepting the signal that above-mentioned metal strip both sides position sensor 89 sends, after device for moving and adjusting 83a and the instruction of 83b transmission position control, by these device for moving and adjusting 83a and 83b the shower nozzle of the both sides among above-mentioned jet head sets β 1 and the β 2 is moved and to adjust on the position that is equivalent on the metal strip sidepiece, adjust to the position that is equivalent to metal strip central authorities and get on and the shower nozzle of central authorities moved.
Fig. 3 is jet head sets α 1---the stereographic map (having omitted above-mentioned advance and retreat setting device among the figure) of α 4 facing to the configuration of cooling roller.Wherein, at the shower nozzle α of both sides aWith α cBe used for cooling off third sidepiece of sheet material, and at the shower nozzle α of central authorities cIt is the middle body that is used for cooling off sheet material.These shower nozzles α a---α c, according to the roller lengthwise location steering order of sending from above-mentioned nozzle position control calculation apparatus 88, respectively by device for moving and adjusting 820---822 controls, do to move adjustment to metal strip sidepiece and middle body position.
In addition, above-mentioned shower nozzle α a---α cInner separately cooling gas pressure is adjusted, and is the instruction of sending according to sheet material temperature control calculation apparatus 87, leads to above-mentioned shower nozzle α to being arranged on a---α cPipeline intermediary pressure regulator valve 840a---the aperture adjustment of 840c is realized.
Fig. 4 is arranged in pulley type refrigerating unit outlet side, and the stereographic map of the side part of the jet head sets of the assist gas refrigerating unit that sets facing to metal strip.Shower nozzle β in both sides aWith β cBe the both sides that are used for cooling off sheet material, the shower nozzle β of central authorities bIt is the middle body that is used for cooling off sheet material.These shower nozzles β a---β c, according to the instruction of the control roller tube lengthwise location of sending from nozzle position control calculation apparatus 88, respectively to device for moving and adjusting 830---832 control, and they are moved on the corresponding position to metal strip sidepiece and middle body adjust.
In addition, above-mentioned shower nozzle β a---β cInner separately cooling gas pressure is adjusted, and is the instruction of sending according to sheet material temperature control calculation apparatus 87, leads to above-mentioned shower nozzle β to being arranged on a---β cPipeline intermediary pressure regulator valve 843a---the aperture adjustment of 843c is realized.
[embodiment 2]
Fig. 5 is the jet head sets α of the gas refrigerating unit in the metal strip refrigerating unit of representing to put down in writing facing to the claim 51 of cooling roller setting 1, α 2The stereographic map (having omitted above-mentioned advance and retreat setting device among the figure) of structure.Wherein, the represented middle body shower nozzle α of figure (a) and (b) d(head body) is used for the cooled metal bands middle body, and schemes (a), (c) represented both sides shower nozzle α a---α cAnd α e---α g(head body) is the lateral section that is used for cooled metal bands.In the shower nozzle of above-mentioned cooling side, α aWith α gBe the head body 10 that is positioned at the outside, α cWith α fBe the head body 10 that is positioned at middle body, α cWith α eBe to be positioned at inboard head body 10.The shower nozzle α of above-mentioned both sides a---α cAnd α e---α g, be according to the position control instruction on the roller length direction of sending from nozzle position control calculation apparatus 88, with device for moving and adjusting 820 and 822, make its two side shiftings to metal strip, this moment is by the above-mentioned shower nozzle α that is positioned at middle body bAnd α fBe set on the position that to guarantee the cooling width that suits.
On near except the connection portion of the metal strip that width is the different zone, be positioned at the shower nozzle α of middle body fIntermediary head body α with the shower nozzle that is positioned at both sides eAnd α gThe adjustment of pressure of inner separately cooling gas be to carry out according to the steering order of sending from sheet material temperature control calculation apparatus 87a.And near the zone the connection portion of the different metal strip of width, when adjusting the head body pressure inside, change at the sheet material narrow from width under the situation of wide sheet material, be positioned at the head body α in the outside in the opposite side shower nozzle a, α gThe adjustment carried out of the pressure of each inner cooling gas, on the contrary, change under the situation of narrow sheet material at leniently sheet material, then to being positioned at inboard head body α c, α eThe pressure of each inner cooling gas adjust, and above-mentioned adjustment process all is the signal that the computer C according to the dimension information of having grasped next section metal strip sends, the steering order of sending according to sheet material temperature control calculation apparatus 87b is carried out respectively.Fig. 6 is the jet head sets β in the assist gas refrigerating unit 1, β 2Stereographic map, this assist gas refrigerating unit is arranged on the outlet side of cooling set of the rolls, and be provided with facing to metal strip, in the metal strip refrigerating unit that claim 52 is put down in writing.Wherein, the middle body shower nozzle β shown in the figure (a) and (b) d(head body) is used for the middle body of cooled metal bands, and schemes the head body β of the both sides shower nozzle shown in (a), (c) a---β cAnd β a---β gThen be used for the cooled metal bands two side portions.β in the shower nozzle that above-mentioned cooling two side portions is used aWith β gBe the head body that is positioned at the outside, β bWith β fBe the head body that is positioned at central part, β cWith β eBe to be positioned at inboard head body.Above-mentioned head body β a---β cAnd β e---β g, be according to the position control instruction of the control metal strip width of sending from nozzle position control calculation apparatus 88, make their two side shiftings with device for moving and adjusting 830 and 832 to metal strip, at this moment, by the above-mentioned head body β that is positioned at middle body bWith β fBe set in and constitute on the position of suitably cooling off width.
On near except the connection portion of the metal strip that width is the different zone, be positioned at the shower nozzle β of middle body dWith the shower nozzle intermediary head body β that is positioned at both sides bAnd β fThe adjustment of inner separately cooling gas pressure be to carry out according to the steering order of sending from sheet material temperature control calculation apparatus 87a.And near the zone the connection portion of the different metal strip of width, when adjusting the nozzle body pressure inside, change at the sheet material narrow from width under the situation of wide sheet material, be positioned at the head body β in the outside in the opposite side shower nozzle a, β gThe pressure of each inner cooling gas adjust, on the contrary, under sheet material is leniently delivered situation into narrow sheet material, then to being positioned at inboard head body β c, β aThe pressure of each inner cooling gas adjust, and above-mentioned adjustment process all is the signal that the computer C according to the dimension information of having grasped next section metal strip sends, and the steering order of sending according to sheet material temperature control calculation apparatus 87b is carried out respectively.
Embodiment 3
Below, the embodiment of the another kind of structure of gas quench system of this metal strip refrigerating unit of conduct of claim 32 record is described.
Fig. 7 to Fig. 9 represents to be installed in the structure of using the embodiment of this gas quench system in the roller back side cooling structure in the pulley type refrigerating unit of continuous annealing furnace of metal strip X.
Being made by the cingens perpendicular forming roll cartridge type refrigerating unit structure of furnace shell in the present embodiment is such, promptly metal strip X is being applied the tensile inlet side strainer roller ε of regulation 1With outlet side strainer roller ε 2Between vertically install continuously from 1 #To 7 #The cooling roller, move the contact length of adjusting with metal strip X by each horizontal direction of these cooling rollers.Among the figure, 91 expression inlet side profilograph thermometers, the 90th, pulley type refrigerating unit outlet side sheet material thermometer, the 92nd, outlet side profilograph thermometer, and β 1And β 2Represent the assist gas refrigerating unit respectively.
On the contact part back side of the metal strip X that touches with each cooling roller socket joint, installing crooked by α 1To α 7Shower nozzle, on each shower nozzle 1, connecting as Fig. 8 and shown in Figure 9, make it along metal strip X width (being called left and right directions later on) with perpendicular to the mobile transfer table that is arranged on the furnace shell outside 3 of direction (being called fore-and-aft direction later on) of metallic strip surface.
Above-mentioned shower nozzle 1 is provided with three along central authorities, left and right three places of the width of each cooling roller, its crooked size is according to definite during for maximum in its amount of being pressed at the cooling roller in back segment district, and each width is much narrower than metal strip X width, and according to producing the focus amplitude design of width temperature distributing disproportionation when even.Along continuous straight runs is being provided with the long slit-shaped nozzle of multistage on its jet flow stream one side surface.And from the outside cooling gas supplied with shower nozzle 1 at its rear, and the shower nozzle support section 100 that supports shower nozzle 1 is being set.Because the outside at furnace shell is given prominence to by this shower nozzle support section 100, using the nonmetal wrinkle protective guard 101 of thermotolerance around it and between the breakthrough part of furnace shell, thereby can keep resistance to air loss and guarantee that nozzle has enough movings range.
In addition, above-mentioned transfer table 3 is by the guide rail 31a, the 31b that are erected at along fore-and-aft direction on the stationary platen 30, with along the transportable base station 32 of guide rail, with the drive unit 33 that drives this base station along fore-and-aft direction, with set up at above-mentioned base station 32 upper edge left and right directions for central authorities and about the independent separately guiding rail 34a to 34c that uses, with can be along these guide rails and each mobile horizontal transfer table 35a to 35c and each horizontal transfer table 35a to 35c can be constituted along the drive unit 36a to 36c that left and right directions moves independently.On horizontal transfer table 35a to 35c, fixedly supporting above-mentioned shower nozzle support section 100 respectively.Thereby, just make three shower nozzles 1 can mobile simultaneously same amount by drive unit 33 effect at fore-and-aft direction, but central authorities and about each shower nozzle 1 can move along left and right directions independently by drive unit 36a to 36c.Above-mentioned drive unit 33 and 36a to 36b can adopt that the combination of for example oil pressure oil cylinder, electronic oil cylinder, screw rod and motor is isostructural supplies with straight-line device, equally, if guiding rail 31a, 31b, 34a to 34c use linear motion bearing, then can carry out high-precision moving.The translational speed that left and right directions moves is by following numerical expression 18 decisions, and the translational speed that fore-and-aft direction moves can be by following numerical expression 19 decisions.
[numerical expression 18]
(ΔW/2)/VN1＜L/VS
In the formula: the maximum value (mm) of the wide variety amount of Δ W---metal strip
The translational speed of VN1---shower nozzle (mm/min)
The maximum permissible value (m) of the control length of L---temperature distribution
VS---metal strip translational speed (m/min)
[numerical expression 19]
VN2＞VR
In the formula: VN2---the translational speed (mm/min) of shower nozzle
The translational speed of VR---roller (mm/mim)
The following describes above-mentioned pulley type refrigerating unit the cooling roller move and the present embodiment structure in the operating state of gas quench system.At first, in this pulley type refrigerating unit, as described above, by strainer roller ε 1And ε 2Make the tension variation of metal strip X use Zhang Changli (more than 29.4 MPa) until roller.Then, move each cooling roller along continuous straight runs #1 to #7, it is contacted with metal strip X, and its amount of being pressed into (contact length) limit adjustment amount of cooling water is adjusted on the limit, but this pulley type refrigerating unit produces uneven temperature distribution at the metal strip width easily, and the gas injection band (not shown) in their propareas is when producing such uneven temperature and distributing, owing to can promote this uneven temperature to distribute, carry out the cooling of the roller back side with above-mentioned gas quench system at this pulley type refrigerating unit.When cool off at the roller back side, adjust the fore-and-aft direction motion and the left and right directions motion of above-mentioned shower nozzle 1, below these actions are illustrated respectively.
At first, explanation be the adjustment of fore-and-aft direction motion, with 1 #With 2 #The shower nozzle α that faces toward of proparea cooling roller 1And α 2The group and with 3 #To 7 #The shower nozzle α that faces toward of back zone cooling roller 3And α 7Group.Both movement technique differences.That is shower nozzle α, 1And α 2The retracted position that this group is hidden from wait begins metal strip X and the cooling roller 1 to the production line #With 2 #Begin contact and all be to get the maximum amount of being pressed into together and forwards move along with the cooling roller, after this, when cooling roller 1 #With 2 #Be pressed into quantitative change and then will rearward move on the contrary when big, make the spacing distance of itself and metal strip X keep certain (when cooling roller 1 #With 2 #The quantitative change that is pressed into hour then carry out opposite moving).In addition, metal strip X on the production line and cooling roller 3 #To 7 #When beginning to contact, shower nozzle α 3To α 7The retracted position that group is hidden from wait is (because when the roller maximum amount of being pressed into, shower nozzle length is got and is designed the biglyyest, so when certain roller can not use because of failure and other reasons, the wait escape hole that determines by preventing to contact this viewpoint to set out) forwards moves once, even cooling roller 3 later on #To 7 #The quantitative change that is pressed into also do not move when big.This move mode is because if be pressed into the saddle-shape distortion that causes metal strip X and because of the uneven temperature distribution of the metal strip X width that causes of the hot bulging of cooling roller touching can not eliminate in the initial stage process because of the cooling roller with the cooling roller socket joint, it is even then more can to encourage this temperature distributing disproportionation, (be because under low especially thermal load occasion in addition, even connect 1 #With 2 #The cooling roller also cools off under the state that can not reach the maximum amount of being pressed into).
Then be noted that the adjustment of moving of shower nozzle left and right directions, be determined at the temperature distribution that oral-lateral metal strip X width is taken in gas injection out of with curved profile thermometer 91, if this temperature distributing disproportionation is even, then detect data according to its determination data with by the sheet material side that curved profile thermometer 91 and 92 records, decision carry out roller back side refrigerative central authorities, about the cool position of 3 shower nozzles 1, these shower nozzles are moved on the hotspot location of the width sheet material central authorities of metal strip X and left and right sides side respectively.And the cool position setting of such shower nozzle 1 also is to carry out according to the measurement result of the sheet material temperature distribution of the profilograph thermometer 92 of pulley type refrigerating unit outlet side, but the former control is preferentially carried out than this feedback control usually.Certainly only carry out the former feed forward control, perhaps only carry out the latter's feedback control.But, because the even state of metal strip X width temperature distributing disproportionation is, even sheet material width degreeization and usually the hotspot location of middle body be constant, and it is lower than the temperature of sheet material lateral section, Figure 10 to Figure 12 is such as described later, the shower nozzle 1 of middle body does not move on left and right directions, and only moves up in front and back, and can make the volume ratio left and right sides shower nozzle 1 of shower nozzle of middle body little.In the structure of present embodiment, the control of the cooling efficiency of being determined by each shower nozzle jet flow stream is to realize according to gas volume or air pressure that the measured value control of outlet side curved profile thermometer 92 is sprayed.
In addition, the different connection portion of sheet material width (distinguished point) that is adjusted at of the move left and right of shower nozzle 1 also is necessary when entering.Promptly, begin just this distinguished point to be followed the tracks of and transmission information from the production line inlet side, at the sheet material width during from narrow broadening, this distinguished point is by before the inlet side profilograph thermometer 91, move on the prescribed position with regard to the shower nozzle about finishing making, on the contrary, at the sheet material width during by wide narrowing down, by after the profilograph thermometer 92 of outlet side, make these left and right sides shower nozzles begin to move in this distinguished point to prescribed position.
Above-mentioned assist gas refrigerating unit β 1And β 2Be to be used for eliminating the even supplementary structure of width temperature distributing disproportionation of producing successive metal strip X with the roller back side cooling structure of present embodiment, have to make each shower nozzle move left and right at its rear, and eject the structure of cooling gas to focus.
Below, the action effect of present embodiment is described.With not carrying out the existing pulley type refrigerating unit of roller back side refrigerative, even at the sheet material temperature distributing disproportionation that metal strip X width can produce as shown in figure 42, but it is even just to eliminate such sheet material temperature distributing disproportionation with the structure of above-mentioned present embodiment.The sheet material temperature deviation of the average sheet material temperature of the sheet material width with respect to the present embodiment structure time little than the time with above-mentioned existing structure, and the present embodiment structure compares with existing structure, and overcooled zone also less, can reach the sheet material uniformity of temperature profile.
As mentioned above, Figure 10 to Figure 12 represents that the central shower nozzle 1 of the described structure of claim 33 is at the motionless embodiment of left and right directions.That is, the head support section 100 of directly fixing central shower nozzle 1 on the base station 32 of the transfer table 3 of the foregoing description (does not have guiding rail 34b, horizontal mobile device 35b and drive unit 36b etc.With reference to Figure 12), the shower nozzle 1 of the left and right sides is as shown in figure 11, and is identical with the foregoing description, has the structure that can move at left and right directions.And the temperature that the even state of the temperature distributing disproportionation of metal strip X width is the sheet material middle body is lower than the temperature of sheet material two side portions, so extremely shown in Figure 12 as Figure 11 in the present embodiment, the shower nozzle 1 about the cooling power ratio of the shower nozzle 1 of middle body is little.
Said structure is applicable to that also production line is the occasion of level.Figure 13 to Figure 16 is that the production line that is applicable to metal strip X of expression claim 34 is structures of the pulley type refrigerating unit of horizontal occasion.Among Figure 13 1 #To 3 #Be the cooling roller, its back side is being provided with crooked shower nozzle 1.The shower nozzle support section 100 of these shower nozzles connects furnace shell and gives prominence to externally, is setting up wrinkle protective guard 101 at its breakthrough part.
Figure 14 is 1 among expression Figure 13 #The transverse section of cooling roller part.Wherein, directly over metal strip X, broad ways is being provided with 3 shower nozzles 1 side by side, and the shower nozzle support section 100 of these shower nozzles penetrates into hull outside by wrinkle protective guard 101.Externally under the state that can move, supporting these shower nozzle support sections 100 along fore-and-aft direction and left and right directions by transfer table 3.Promptly, as Figure 15 and shown in Figure 16, connect the above-mentioned shower nozzle support section 100 of the lifting table 37 of this transfer table 3, be suspended in and be arranged on the horizontal transfer table 35a to 35c that the guiding rail 34a to 34c on the lifting table 37 moves along left and right directions, and shower nozzle support section 100 is being connected with the bar of drive unit 36a to 36c, because by drive unit 36a---the effect of 36c can move up at right and left, so 3 shower nozzle 1 each self energy move left and right.In addition, above-mentioned lifting table 37 is connecting the bar of the lifting device 38a to 28b that is provided with at the furnace shell fixed part, by the driving of this lifting device 38a to 38b, can move along fore-and-aft direction.
Embodiment 4
Below, an embodiment of claim 41 record used as the another kind of structure of the assist gas refrigerating unit of metal strip refrigerating unit is described.
Figure 17 to Figure 18 represents this structure is used for the embodiment of the assist gas refrigerating unit structure that the pulley type refrigerating unit outlet side at the continuous annealing furnace of metal strip X is provided with.
The structure of the perpendicular forming roll cartridge type refrigerating unit that is surrounded by furnace shell of present embodiment be provided with continuously in vertical direction contact with metal strip X 1 #---7 #The cooling roller, and the assist gas refrigerating unit of this structure also is set at its outlet side, this point is identical with the foregoing description 3.
In the present embodiment, on the production line of metal strip X abreast crossbearer guiding rail 4, along this guiding rail 4 walking carriage 5 that can walk is being set, the structure of above-mentioned running gear can be made of 2 chassis.On walking carriage 5, installing the shower nozzle β narrower of the nozzle that jet flow stream uses abreast with the production line direction than metal strip width, a side is provided with 2, and pros and cons is totally 4 (β 1To β 4).Above-mentioned walking carriage 5 is moved along guiding rail 4 by travel mechanism 6 effects, so shower nozzle β can move on metal strip X width.In addition, the pipeline 7 of forming the gas supply passageway is being set on each shower nozzle β, pipeline 7 becomes 2 the tunnel at central fascicle, with linking up and down of each shower nozzle β.As shown in figure 17, present embodiment is being fixed central shower nozzle β at metal strip X width substantial middle part upper edge production line 5And β 6(on the tow sides).Can cool off the focus that takes place at metal strip X width central part.But, even the focus of this part also is positioned on the roughly the same position when metal strip X wide variety, and since the temperature of metal strip width both sides usually than central part height, so the nozzle position of central part is constant, its length is than other shower nozzle β 1To β 4Short.
In said structure, guiding rail 4 is divided into 2 on of metal strip X is lateral, pros and cons is established 4 altogether, it is parallel with this metal strip X surface, and crossbearer on the width of metal strip, Shang Fang guiding rail 40 and 41 wherein, as Figure 19 and shown in Figure 20, make the structure that section is a wedge shape, so that described laterly have wheel 500 walking carriages of circular cone groove can not produce the gap at 50 to 53 o'clock putting, owing to adopt such structure, so can correctly produce the interval of shower nozzle β and metal strip X.And the guiding rail 42 and 43 of below as Figure 19 and shown in Figure 20, is considered the thermal expansion of shower nozzle β and the influences such as bending of guide rail, on the contrary will and the wheel 501 of the line colyliform of following walking carriage 54 to 57 between, up with about can generation gap Y 1And Y 2Structure (Y 1Be to consider the setting accuracy of shower nozzle β and thermal expansion and determine Y 2Be to consider the setting accuracy of guide rail and determine).As shown in figure 19, upper and lower guide rail 4 all is being provided with shielding slab 502 facing to metal strip X one side, is locally heated and bending with regard to not penetrating because of the hot-rolling of metal strip X like this.
Again, walking carriage 5 has and its wheel 500 is put on last guiding rail 40 and 41 walking carriage 50 to 53 and its wheel 501 can be entrenched in rotationally following walking carriage 54 to 57 on the guiding rail 42 and 43 down, wherein, in fact last walking carriage 50 to 53 forms the state that shower nozzle β is hung, and walking carriage 54 to 57 plays the shower nozzle β that makes lengthwise and the effect of metal strip X keeping parallelism down.
Above-mentioned shower nozzle β uses along the microscler structure of production line direction.In its surface, on the width of metal strip X, long nozzle is provided with multistage along its length, and the width of this nozzle is determined by temperature distribution in advance.And the interval of this nozzle and metal strip X must separate the heet transfer rate that can obtain necessity and can avoid contacting with metal strip X.And as mentioned above, in fact this shower nozzle β is in the state that is suspended on the walking carriage 50 to 53, and following walking carriage 54 to 57 is to support auxiliaryly.
Travel mechanism 6 will be provided with along above-mentioned guiding rail 4 directions in the furnace shell outside, set 2 up and down at the one-sided of metal strip X width, pros and cons sets 4, and then set 8 the structure of screw jack 600 altogether in both sides as basic structure, be by the drive shaft 602 that expansion pipe 601 is being set on every side that is connected on these screw jacks, apply motivating force for respectively these screw jacks 600, one-sided CD-ROM drive motor 603a and the 603b that respectively is equipped with at above-mentioned metal strip X width, with transmit the wheel casing 604 that this motivating force is used, and the synchronous swing pinion of using in the transmission of drive force that the input shaft of this screw jack 600 is equipped with respectively 605 and be suspended on up and down synchronously the rotation roller chain between the swing pinion 605 606 and form.Promptly as Figure 22 and shown in Figure 23, CD-ROM drive motor 603a or 603b respectively set 1 at the one-sided of each furnace shell, its turning axle is branched off into 2 axles after being connected said gear case 604, these 2 axles are connected with the input shaft of the spiral lifting 600 that is arranged on downside respectively, thereby make drive shaft 602 advance and retreat that are connected with each screw jack 600.Because each drive shaft 602 is being connected with 57 with 56 or 55 with above-mentioned walking carriage 54 down, so can make down walking carriage along above-mentioned following guiding rail 42 and 43 walkings by the advance and retreat of drive shaft 602.On the other hand, be installed in the synchronous swing pinion 605 that the transmission of drive force on the input shaft of screw jack 600 is used, by roller chain 606 its rotary driving force is passed on the synchronous swing pinion 605 of screw jack 600 1 sides of top, the drive shaft 602 that is connected with this screw jack 600 is similarly advanced and retreat.Thereby, make with the energy of rotation of 1 CD-ROM drive motor 603a or 603b on the one-sided tow sides up and down of metal strip X width, to amount to 4 chassis 5 that walk up and down synchronously and respectively along guiding rail 40 to 43 walkings up and down.Because this chassis that walks up and down same amount of only walking in the same direction in the both sides on metal strip X two sides, so be installed in shower nozzle β on these chassis that walk up and down 1, β 2Or β 3, β 4Can not keep plumbness to move to like that on the prescribed position of metal strip X width obliquely.607 of Figure 22 is the transmitters that detect nozzle position, reads the revolution of screw jack 600 and passes to controller for motor 608 at this, by the rotation of this controller for motor 608 above-mentioned CD-ROM drive motor 603a of control or 603b.The width of the metal strip X that the amount of movement consideration of walking carriage at this moment is inserted into determines.
Above-mentioned pipeline 7 as Figure 17 and shown in Figure 180, penetrates into inside from the furnace shell outside, is branched off into two-way up and down at there, and is being communicated with in the upper and lower of a shower nozzle β, and cooling gas is supplied with this shower nozzle β inside from the outside.But, as mentioned above, shower nozzle β 1To β 4Move on metal strip X width by the walking of walking carriage 50 to 57,, as shown in figure 24, thereby can follow each shower nozzle β so this pipeline 7 also is to go up inferior division expander 70 is clipped in the middle 1To β 4Move.As described above, each shower nozzle β 1To β 4The amount of cooling water adjustment be that the adjustment of gaseous tension of the cooling gas supplied with by this pipeline 7 or the adjustment of flow are carried out.Also scalable component shown in Figure 25 71 can be arranged in its way with being clipped in the middle also available other structure that can under airtight conditions, use and the deflection energy Free Transform as expansion joint.
The following describes the operating state of the assist gas refrigerating unit of this structure in the above-mentioned pulley type refrigerating unit.As mentioned above, with above-mentioned strainer roller ε 1To ε 2The tension force that changes metal strip X makes each cooling roller 1 when roller uses tension force (more than the 29.4MPa) #To 7 #Move in the horizontal direction, X contacts with metal strip, and then its amount of being pressed into of limit adjustment (contact length), and amount of cooling water is adjusted on the limit, even also can carry out the cooling of the roller back side with above-mentioned gas quench system on this pulley type refrigerating unit.When cooling off, by adjusting above-mentioned cylinder back side cooling spray α at the roller back side 1To α 7With moving of metal strip X Surface Vertical direction and moving of broad ways, make these shower nozzles α respectively 1To α 7Move on the focus, and keep the proper spacing distance, carry out the back side cooling of this part.
At this moment, as the assist gas cooling structure of this pulley type refrigerating unit and be arranged on the assist gas refrigerating unit of present embodiment of its back zone, be the even device of being eliminated of the temperature distributing disproportionation that on the cooling structure of the above-mentioned roller back side, the metal strip X width that does not cut off, make each shower nozzle β at its rear 1To β 4Move left and right, from the two sides of metal strip X to focus shower cooling gas.
What the following describes is the adjustment that shower nozzle at this moment moves, at this pulley type refrigerating unit outlet side, measure the temperature distribution of metal strip X width with profilograph thermometer 92, if temperature distributing disproportionation is even, then decide 4 shower nozzle β according to this determination data with by the sheet material both sides detection data that profilograph thermometer 91 and 92 is measured 1To β 4Cool position, and each CD-ROM drive motor 603a to 603b is driven make 50,52,54,56 and one groups of walkings of one group of walking carriage advise car 51,53,55,57 to move respectively, to make the shower nozzle β that moves on metal strip X two sides with being integral 1And β 3, β 2And β 4Group moves on the hotspot location of metal strip X width sheet material left and right sides portion.Even but the even state of the temperature distributing disproportionation of metal strip X width is that the sheet material width changes usually, the hotspot location of central part does not also change and is lower than the temperature of sheet material both sides, so as mentioned above, and the shower nozzle β of central part 5To β 6Be fixed on this central part, and do not move, the cooling power of shower nozzle also than about shower nozzle β 1To β 4Little.
Equally, shower nozzle β 1To β 4To metal strip X width move to be adjusted at the different connection portion of sheet material width (distinguished point) particularly necessary when entering.That is, just begin to follow the tracks of this distinguished point and obtain information from the production line inlet side, when sheet material width during from narrow broadening, this distinguished point makes these shower nozzles β by before the inlet side profilograph thermometer 91 1To β 4Moved to prescribed position, on the contrary, when the sheet material width leniently narrows down, treated that this distinguished point by after the profilograph thermometer 92 of outlet side, makes these shower nozzles β 1To β 4Begin to move to prescribed position.
Below, the action effect of present embodiment is described.Be provided with on the pulley type refrigerating unit that carries out before the refrigerative of the roller back side, even at the sheet material temperature distributing disproportionation that metal strip X width can produce as shown in figure 42, and it is even to use roller back side cooling structure just can relax sheet material temperature distributing disproportionation as described above.And the present embodiment structure, can obtain roughly near the result shown in Figure 56 so can eliminate the even phenomenon of sheet material temperature distributing disproportionation fully owing to used assist gas refrigerating unit structure as described above in the back zone.
This structure is applicable to that also production line is the occasion of level.Figure 26 to Figure 31 represents that the production line of metal strip X is the described structure of claim 41 that is suitable in the pulley type refrigerating unit of horizontal occasion.Figure 26 is the side plan view of metal strip X on horizontal production line, the production line of guiding rail 4 and metal strip X crossbearer abreast, along this guiding rail 4 walking carriage 5 can be set with walking, such as shown in figure 27, on this walking carriage 5, be installed with abreast and be equipped with nozzle that gas injection uses and the shower nozzle β narrower on it than this metal strip width with the production line direction.Above-mentioned walking carriage 5 passes through travel mechanism 6 (by 8 screw jacks 600 altogether that are provided with along above-mentioned guiding rail 4 directions in the furnace shell outside, the drive shaft 602 that expansion pipe 601 is being set on every side and is being connected with these screw jacks, respectively the input shaft of these screw jacks 600 is applied the CD-ROM drive motor 603a and the 603b of motivating force, and form at synchronous swing pinion 605 that the transmission of drive force that is being equipped with respectively on each turning axle of this screw jack 600 is used and the rotation roller chain 606 that is suspended between these synchronous swing pinions 605) along guiding rail 4 walkings, so shower nozzle β can move at metal strip X width.But, in the present embodiment, because metal strip X also can produce the situation of dangling, so to following side shower nozzle β 3And β 4Walking car guiding guiding rail 41 and 43 and support section on oil pressure or air pressure oil cylinder 44 are set, thereby can adjust this shower nozzle β 3And β 4Height.
Figure 28 is illustrated in the wheel 503 of walking carriage 51 of the inlet side top among the above-mentioned figure and the bonding state of guiding rail 40, Figure 29 is illustrated in the wheel 504 of the walking carriage 55 above the outlet side and the bonding state of guiding rail 42, Figure 30 represents the wheel 503 of the walking carriage 53 below the inlet side and the bonding state of guiding rail 41, and Figure 31 expresses the wheel 504 of the walking carriage 57 below the oral-lateral and the bonding state of guiding rail 43.In these figure, the guiding rail 40 of inlet side up and down and 41 identical with shown in the foregoing description, all forming section is the structure of wedge shape, so that put walking carriage 51 and 53 have the wheel 503 of circular cone groove the time do not produce the gap, equally, the guiding rail 42 and 43 of outlet side up and down all is formed up to the plane structure of rare Δ width, is under the situation of Δ at the thermal expansion amount of considering shower nozzle, when putting common disc wheel 504, can on guide rail surface, slide.
Embodiment 5
Below, to claim 54 record be suitable for describe as the embodiment that is arranged on the pulley type refrigerating unit in the metal strip refrigerating unit.
This structure is the cooling roller 1 with pulley type refrigerating unit 1000 usefulness #---7 #Structure make as the Figure 32 of expression roller section structure and the structure shown in Figure 33 of this roller deployed condition of expression, simultaneously to these cooling rollers 1 #---7 #The water passage system of confession water coolant is made system as shown in figure 34.
At first, each cooling roller 1 #---7 #All constitute the roller body by the inner core 1001 of the water-filled pipe that forms coolant channel and the urceolus 1002 that is fixed on around this inner core by shrink-on.Wherein, the water-filled pipe r that forms on inner core 1001 sides as shown in figure 33, has 6 pipeline r 1---r 6Parallel to each other separately at grade and vertically in the shape of a spiral shape ground around being provided with.
To the cooling roller 1 that above structure is arranged #---7 #The water passage system that supplies water as shown in figure 34, all is provided with 2 systems of cooling water supply pipe 1010 and water coolant water shoot 1011, at cooling roller 1 #---7 #The one side water-supply pipe 1010a and the water shoot 1011b of this group whenever are provided with alternately, and at opposite side setting corresponding therewith water shoot 1011a and water-supply pipe 1010b, these water supply and drainage pipelines, just on front and back cooling roller, connecting on the contrary separately, therefore, can make each cooling roller 1 #---7 #Water-filled pipe r in the flow of cooling water direction on every, all reversally supply with.Above-mentioned water-filled pipe has r in the present embodiment 1---r 6Such 6, below the expression this number common determining method.Near the wall part of the flow velocity of the water coolant that at first flows through in water-filled pipe high temperature water-filled pipe outlet side must be set at 1.3---4.0m/sec.This is because of (1) the cooling roller with thermal load high (winding angle is big) pulley type refrigerating unit, in water-filled pipe, must not make the water coolant boiling, at this moment flow velocity needs more than 1.3m/sec, and (2) are by the heat decision of the essential exchange of each pulley type refrigerating unit; Wait the flow velocity (for example more than the 0.6m/sec) that obtains the water coolant in needing that water-filled pipe more than numerical value of heat-shift by Figure 35, (3) flow velocity of scale does not take place in water-filled pipe, minimum must be more than 0.6m/sec, the condition of above-mentioned (1) is as criterion speed, lower flow rate limit in its decision water-filled pipe, (4) as shown in figure 36, carry the pressure-losses of the pump of water coolant can reach 4.4k8/cm if this flow velocity surpasses 4.0m/sec in addition 2More than, the crushing when power waste and scale adhere to just increases significantly, thus it is become surely the upper limit of flow velocity.
Surpass 70 ℃ as the water temperature in the water-filled pipe in above-mentioned flow rates, again owing to scale takes place easily, so outlet water temperature of each cooling roller must be set in below 70 ℃.
On the other hand, according to the order of the flowcharting of Figure 37, up to the heat-shift Q of metal strip and water coolant HCooling heat Q with metal strip sUnder the condition that equates, carry out the Calculation of Heat Transfer of each roller, calculate the speed of cooling CR (J) of each roller thus, average cooling rate ACR, average comprehensive thermal absorptivity AV o
Thereby, from above water coolant flow velocity; Speed of cooling CR (J), the average cooling rate ACR of roller outlet water temperature, each roller, average comprehensive thermal absorptivity AV oCan select the bar number of the water-filled pipe that satisfies these parameters etc. parameter.
Calculating shown in the flow process of above-mentioned Figure 37 can followingly be carried out like that.At first carry out the reading in of roller position [X (I), Y (I)] when metal strip x is maximum to reel, with this position as initial value.Calculate the roller coiling length L S (I) of metal strip X then, winding angle AR (I), total coiling length T LL, total production line length LO.Carry out condition enactment then, establishing inlet side metal strip temperature T SE is TS (I), and establishing inlet water temperature TVVE is TW (I), and establishing coiling length L S is LS (I), establishes winding angle AR (I), and establishing roller thickness of shell RST is RT (S), and roller diameter D is D (I).According to these, abide by the heat-shift Q that following order is asked roller outlet sheet material temperature T SD, roller outlet water temperature T WD, metal strip X and water coolant H, comprehensive thermal absorptivity U oPromptly 1. suppose roller outlet sheet material temperature T SD, obtain the amount of cooling water Q of metal strip X from following numerical expression 20 s2. establish this cooling heat Q sBe the heat Q that water takes away that is cooled w, ask shell inner surface temperature T RSI from next numerical expression 21.3. establish this cooling heat Q sBe the heat conducting heat Q of roller housing R, ask housing outer surface temperature T RSO from following numerical expression 22.4. ask the thermal conductivity λ of low temperature side material from this TRSO L, and establishing metal strip X temperature is TRSA=(TSE+TSO)/2, asks the thermal conductivity λ of high temperature side material H5. ask DPH H from this TRSA v, and tension force LTENS obtains face and presses P on roller diameter D, metal strip thickness ST, the production line.6. be worth λ according to following numerical expression 23 from these L, λ H, P, H YObtain contact thermal conductivity H c7. use following numerical expression 24 and numerical expression 25 from H cObtain condensation thermal absorptivity V o, metal strip and water heat-shift Q H8. until the cooling heat Q of above-mentioned metal strip sEqual the heat exchange amount Q of this metal strip and water H, set roller outlet sheet material temperature T SD again, repeat 1. above-mentioned---order 7..If finish 1. above to 1 cooling roller---8. Calculation of Heat Transfer, then establish the sheet material temperature T SI of the sheet material temperature T SD of this roller outlet, other TWD, V for next cooling roller inlet o, Q HValue is stored as identical value, carries out the Calculation of Heat Transfer (the number NR of I=1～roller) of each roller repeatedly.If the sheet material temperature T S (NR+1) of final cooling roller outlet equals target plate temperature T S-DA, calculate the speed of cooling CR (J) of each roller, average cooling rate ACR, average comprehensive thermal absorptivity AV.Export this result then.If two values are unequal, calculate the amount of movement DY of the cooling roller that moves control, only the roller position of this roller [CRT (I)=1] is set again, return the roller coiling length L S (I) that recomputates metal strip X again, winding angle AR (I), the length T of always reeling LL, total production road length L O.
[numerical expression 20]
Qs＝(HSE-HSD)×ST×W×V×60×7.85×10 -3
HSE in the formula: metal strip inlet institute's heat content (kcal/kg)
HSD: metal strip outlet institute's heat content (kcal/kg)
ST: metal strip thickness (mm)
W: metal strip width (mm)
V: line speed (mpm)
[numerical expression 21]
Q wALPHI in the formula of=ALPHI * AI * (TRSI-TWA): heet transfer rate (kcal/m in the pipe 2H ℃)
AI: water-filled pipe heat transfer area (m 2)
[numerical expression 22]
QR＝THCRSA×RST×10 -8×AM×(TRSO-TRSI)
THCRSA in the formula: the thermal conductivity (kcal/m of housing 2H ℃)
AM: average heat transfer area (m 2)
[numerical expression 23] H c = 3 × 10 4 × ( P Hc · λ L · λ H λ L + λ H ) + 2 × 10 3
Hc in the formula: contact thermal conductivity (kcal/m 2H ℃)
[numerical expression 24]
V o＝20.1×H c 0.8×RST -0.22×AR -0.28
V in the formula: comprehensive thermal absorptivity (kcal/m 2H ℃)
[numerical expression 25]
Q H＝Vo×W×LS×10 -6×TM
LS in the formula: coiling length (mm)
TM: log-mean temperature difference (℃)
On the continuous annealing production line of the present embodiment that constitutes by above-mentioned structure, by upstream side configuration tension force smoother 2004 at direct flame-type reduction process furnace 2007, improve the sheet material of the metal strip X in this process furnace 2007 and wear the stove performance, can stablize the reduction heat characteristic of this direct flame-type reduction process furnace 2007 simultaneously.
Can carry out the shape correction of the generation extension of metal strip X with this tension force smoother 2004, make the section contraction can not take place in the above-mentioned gas shower cooling band 2010, the section that can improve significantly simultaneously in the pulley type refrigerating unit 1000 shrinks generation and inhomogeneous cooling, consequently the metal strip X on this production line can not wriggled, and can improve the quality of product.The problem that contacts with pipe in the radiation tubular type soaking pit 2009 with radiation tubular oven 2008, with above-mentioned gas shower cooling band 2010 in jet flow stream the nozzle contact problems, with roller refrigerating unit 1000 in the shower nozzle α of jet flow stream of roller back side cooling usefulness 1---α 7Contact, and with problem such as contact with the nozzle of jet flow stream in the rapid heating furnace 2012 and do not exist.
Below, the cooling roller 1 in the present embodiment pulley type refrigerating unit 1000 is described #---7 #The water flowing method and move and roller back side cooling shower nozzle α 1---α 7Operating state.At first, water coolant being flowed into above-mentioned water passage system shown in Figure 34, makes whole 6 water-filled pipe γ 1 of each cooling roller in the mobile preparatory stage of this roller refrigerating unit 1000---the flow of cooling water direction of γ 6 is reversally supplied with in each roller.And by strainer cylinder ε 1---after ε 2 makes the tension force of this metal strip X be altered to roller use tension force (more than 29.4 MPa), make each cooling roller 1 #To 7 #Along continuous straight runs moves, and it is contacted with metal strip X, and then the limit is adjusted its amount of being pressed into (contact length) limit and adjusted amount of cooling water.
Cooling roller 1 at present embodiment #---7 #In owing to be provided with that 6 water-filled pipe γ 1---γ 6 spirally, each water-filled pipe γ 1 on the whole---the length of γ 6 can shorten, and can reduce the heat exchange amount of each water coolant that flows through this water-filled pipe.Even near the both sides roller surface each water-filled pipe outlet side consequently, the cooling performance of metal strip X also is very good, and the temperature distribution of this metal strip X roughly becomes symmetry status at width after cooling.Owing to make each cooling roller 1 #---7 #Water-filled pipe in the flow of cooling water direction in each roller, reversally supply with, so both sides roller surface and the thermograde between near the both sides roller surface the outlet side near the water-filled pipe r inlet side are opposite in each roller, last on the cooling roller of back zone its thermograde also with regard to Lock-out.
(embodiment 6)
At last, the embodiment with the metal strip method of cooling of the foregoing description 1 metal strip refrigerating unit structure to claim 64 is illustrated.
Present embodiment is in pulley type refrigerating unit shown in Figure 2, carries out the cooling of the roller body back side with the metal strip cooling structure of representing below.
That is, cool off set of the rolls 1 with being arranged on according to the average sheet material temperature control of sheet material temperature deviation #-to 4 #The sheet material thermometer 90a of outlet side detects metal strip X width sheet material temperature distribution, sheet material temperature control calculation apparatus 87 is according to this temperature signal, metal strip central part sheet material temperature and target plate temperature are compared, cool off set of the rolls 1 with contact length setting device 80 #To 4 #Each roller and the adjustment of the contact length of metal strip X.
Sheet material temperature distribution control according to the target plate temperature distribution is at first to make facing to cooling roller 1 #To 4 #The shower nozzle α of the gas quench system that is provided with 1---α 2Do not contact like that with metal strip X, from cooling set of the rolls 1 #To 4 #Each roller position obtain the track that is wound on the metal strip X of these coolings on rollers, each shower nozzle of gas quench system is moved on the direction that the cooling roller moves, adjust its position with maintenance proper spacing distance.
Then, by cooling off set of the rolls 1 #To 4 #Inlet side and outlet side on the position signal of the metal strip both sides detected of the metal strip both sides position sensor that is provided with 89, infer at the above-mentioned gas refrigerating unit and cool off set of the rolls 1 with position control calculation apparatus 88 #To 4 #Outlet side on each locational metal strip X both sides of the assist gas refrigerating unit that is provided with and the center of width, with the device for moving and adjusting 82 and 83 on each shower nozzle that is connected above-mentioned gas refrigerating unit and assist gas refrigerating unit separately, the shower nozzle of both sides and the shower nozzle of central part are moved on the metal strip width, get the cooling width (the cooling width of shower nozzle and metal strip lap) shown in above-mentioned numerical expression 8 or numerical expression 9 such to the shower nozzle of both sides, shower nozzle to central part carries out the position adjustment respectively, so that make the center of the center of metal strip width and shower nozzle consistent.As carrying out specific description with Fig. 3 and Fig. 4, that is, with the device for moving and adjusting 820 that is connected with the both sides shower nozzle in the device for moving and adjusting 82 and 822 pairs and cooling roller facing to the shower nozzle α of the both sides in each gas quench system of setting aAnd α cCarry out the position adjustment; Showerhead α with the 821 pairs of central parts of device for moving and adjusting that are connected with the central part shower nozzle in the device for moving and adjusting 82 oCarry out the position adjustment.Equally, with the device for moving and adjusting 830 that is connected with the both sides shower nozzle in the device for moving and adjusting 83 and 832 pairs and cooling set of the rolls 1 #To 4 #The shower nozzle β of both sides in the assist gas refrigerating unit that outlet side is provided with aAnd β cCarry out the position adjustment, use the shower nozzle β of the 831 pairs of central parts of device for moving and adjusting that are connected with central part spray portion in the device for moving and adjusting 83 again oCarry out the position adjustment.
Then, according to cooling off set of the rolls 1 #To 4 #The temperature signal of sheet material thermometer 90a that outlet side is provided with and the metal strip X width that detects at the sheet material thermometer 90b that the outlet side of assist gas refrigerating unit is provided with, the temperature distribution and the target plate temperature distribution that compare its mensuration sheet material temperature with sheet material temperature control calculation apparatus 87, corresponding to its sheet material temperature deviation, supply with the cooling gas pressure (omission pressure warning unit) of revolution or pressure-regulating valve 84a---at least one is to shower nozzle α of each gas quench system and assist gas refrigerating unit in the aperture of 84e---the β inside of fan 85a and 85b with cooling gas and adjust, adjusted cooling gas is injected on the metal strip X.Cooling gas (omits Fig. 2) in stove by heat exchanger 86, cooling gas and supplies with fan 85 each gas quench system of supply and assist gas refrigerating units.
Fig. 2 is separately positioned on cooling set of the rolls 1 with the sheet material thermometer #To 4 #Outlet side and assist gas refrigerating unit outlet side, but also can be the structure of only cooling off the outlet side setting of loading amount at assist gas.
Below, the calculation method of the shower nozzle optimum position (being the optimal spacing distance) of the gas quench system that above-mentioned and cooling roller face toward is described with Figure 38.
At 2 cooling rollers 1 #, 2 #In, establishing the roller radius is F 1And F 2, establish roller in the heart distance be LO, the reference line of roller when roller does not contact with metal strip is at shower nozzle α 1And α 2The length that one side is exposed is L 1And L 2, the winding angle of roller and metal strip X is 8, shower nozzle α 1And α 2Angle be η 1And η 2The downside shower nozzle α of research sd so situation 2
At first, metal strip X and downside cooling roller 2 #The coordinate of point of contact A by 26 expressions of following numerical expression.
[numerical expression 26]
(L 2+ F 2-F 2CoS θ, F 2Sin θ) metal strip X and upside cooling roller 1 #The coordinate of point of contact B by 27 expressions of following numerical expression.
[numerical expression 27]
(L 1-F 1+F 1·Cosθ，LO-F 1·Sinθ)
And the straight line portion of metal strip X tilts by following numerical expression 28 expressions.
[numerical expression 28]
1/tanθ
Then as asking the value of winding angle θ, then by following numerical expression 29 expressions.
[numerical expression 29] LO - F 1 · Sinθ - F 2 · Sinθ L 1 - F 1 + F 2 · Cosθ + L 2 - F 2 + F 2 · Cosθ = 1 tan θ Formula by this numerical expression 29 becomes following numerical expression 30.[numerical expression 30] θ = tan - 1 { x 2 / 1 - x 2 } - tan - 1 x 1 X in the formula 1=(F1+F2-L1-L2)/LO x 2 = ( F 1 + F 2 ) / LO 2 + ( F 1 + F 2 - L 1 - L 2 2
In addition, the straight line portion of metal strip X is obtained by following numerical expression 31.
[numerical expression 31]
Y-F 2·Sinθ＝(X+L 2-F 2+F 2·Cosθ)/tanθ
As shower nozzle α 2When being spaced apart G with the minor increment of metal strip X, this shower nozzle α then 2The optimum position should be following like that.
1) coiling length is than shower nozzle α 2Long occasion
That is θ 〉=η, 1＞/2 o'clock, shower nozzle α 2The position E at center and the distance of metal strip X be the such shower nozzle α of G 2The position be the optimum position.
2) coiling length is than shower nozzle α 2Short occasion
That is θ＜(η, 1)/2 o'clock, shown in the following columns formula 32 of the coordinate that the coordinate that the coordinate that D is ordered, C are ordered, E are ordered, numerical expression 33 and the numerical expression 34 like that.
[numerical expression 32]
(X 3，Y 3)＝[X 3，(F 2+G)Sin(η 2/2)-G·Sinθ
X in the formula 3Be with the above-mentioned numerical expression 29 resulting X values of Y substitution
[numerical expression 33]
(X 4，Y 4)＝(X 3-G·Cosθ，Y 3+G·Sinθ
[numerical expression 34]
(X 5，Y 5)＝{X 4-(F 2+G)[1-Cos(η 2/2)]，O}
Thereby, shower nozzle α 2Central position E and the distance of metal strip X be | X 5| such shower nozzle α 2The position be the optimum position.
As example, the calculation method of the shower nozzle optimum position on the metal strip width with metal strip X width sheet material corresponding each gas quench system of temperature distribution change of shape and assist gas refrigerating unit is described particularly with Figure 39 with respect to the control of the sheet material temperature distribution of target plate temperature distribution.
1) quantification of sheet material temperature distribution
It at first, wherein is the quantification of sheet material temperature distribution.That is, the sheet material temperature distribution of metal strip width can be represented with 4 power series that following numerical expression 35 is represented.
[numerical expression 35]
T(X)＝a 1X 4+a 2X 3+a 3X 2+a 4X+a 5
X in the formula: in width normalization method ,-1≤X≤1.
The function of numerical expression 35 is obtained by the measurement result of above-mentioned sheet material thermometer (Fig. 2 90) with method of least squares.
2) calculate the optimum position of shower nozzle at the metal strip width
Then, carry out the calculating of shower nozzle at the metal strip width position.The sheet material temperature distribution of the cooling set of the rolls outlet side sheet material width of being obtained by above-mentioned quantification is as shown in Figure 39 the time, than target plate temperature distribution T ' (X) the temperature defective region of high high temperature side have 1.-1≤X≤X 1
②X 2≤X≤X 3
③X 1≤X≤1
In the formula, X 1, X 2, X 3, X 4: be partitioned into the bad zone of high temperature side sheet material temperature (with reference to Figure 39 hatched example areas).
The position of centre of gravity X in the zone of the sheet material temperature deviation of generation both sides C1, X C2Position of centre of gravity X with the zone that produces central part sheet material temperature deviation cCan obtain by the center of gravity calculation of following numerical expression 36, numerical expression 37 and numerical expression 38.
[numerical expression 36] x e 1 = ∫ - 1 x 1 | T ( x ) - T ′ ( x ) | · x · dx ∫ - 1 x 1 | T ( x ) - T ′ ( x ) | dx
[numerical expression 37] x e 2 = ∫ x 4 1 | T ( x ) - T ′ ( x ) | · x · dx ∫ x 4 1 | T ( x ) - T ′ ( x ) | dx
[numerical expression 38] x c = ∫ x 2 x 3 | T ( x ) T ′ ( x ) | · xdx ∫ x 2 x 3 | T ( x ) - T ′ ( x ) | dx Therefore, adjust the shower nozzle α of both sides respectively 1, α 2Make both sides cooling width I E1, I E2It is such to become following numerical expression 39 and numerical expression 40, adjusts the shower nozzle α of central part 2Make wherein mind-set X CThe position move, adjust the cooling gas pressure of each shower nozzle inside accordingly with each regional sheet material temperature deviation, by to the adjusted cooling gas of metal strip spraying pressure, also can be corresponding with the variation of sheet material temperature distribution shape.
[numerical expression 39]
I e1＝(X e1+1)·B
[numerical expression 40]
I 2＝(1-X a2)·B
B in the formula: the width of metal strip (mm)
I E1, I E2: the cooling width (mm) of both sides
As mentioned above, adopt structure of the present invention, with respect to size in a big way, on one side metal strip width sheet material temperature distribution and target plate temperature distribution are compared, just can quicken cooling on one side with the operational cost of cheapness.
And as structures according to claim 14 to 17,29 to 30,51 to 53 and 56,57 records, changing repeatedly, significantly on the production line of metal strip sheet material width especially, can remedy the mobile hysteresis of above-mentioned shower nozzle, simultaneously suitable cooling can be carried out again, sheet material width uniformity of temperature profile and cooling fast can be carried out.
If structure according to claim 31 to 41 and 58 to 63 records, make shower nozzle move to the even zone of metal strip temperature distributing disproportionation with transfer table and running gear, and keep appropriate intervals apart from ground shower cooling gas, just can control the temperature distribution of this metal strip width thus equably.
As cooling roller,,, can reduce the heat exchange amount of each refrigerant that flows through this coolant channel so can integrally shorten the length of coolant channel owing on the cooling roller, many coolant channel are set according to claim 54 record.Even consequently near the both sides roller surface each coolant channel outlet side also has abundant effect to metal cools, can make the metal strip width uniformity of temperature profile in the cooling, the cooling back roughly becomes symmetry status in the temperature distribution of this metal strip on width.If roller cooling structure according to claim 55 record, because making the coolant flowing direction in each coolant channel of cooling off roller reversally supplies with in per 1 roller, so near both sides roller surface the coolant channel inlet side and the thermograde between near the both sides roller surface the outlet side are opposite in each roller, also can make the speed of cooling equalization of metal strip width, in the cooling roller thermograde of back zone with regard to Lock-out.The material of the metal strip that therefore, obtains is uniform at its width.
The present invention can be applicable in the assistant cooling structure of the roller back side cooling structure of the roller refrigerating unit in the metal strip treatment production road and this roller refrigerating unit inlet side and outlet side.

Claims (56)

1, a kind of metal strip refrigerating unit, it be with metal coil tape on the cooling roller more than 1, and adjust the cylinder type cold radiator cooler that above-mentioned metal strip and each cooling roller socket joint touch length, it is characterized in that having gas quench system and gas setting device, above-mentioned gas quench system has across metal strip, be provided with facing to ground with above-mentioned cooling roller, the shower nozzle that roller length is narrower than the width of two above metal strips, these shower nozzles are to make to move freely on the travel direction of cooling roller simultaneously, and the structure that at least one shower nozzle can move freely at the roller length direction in these shower nozzles, above-mentioned gas setting device are to adjust the cooling gas pressure of each shower nozzle inside or gas flow.
2, metal strip refrigerating unit as claimed in claim 1, the nozzle that it is characterized in that above-mentioned shower nozzle be with the sort of make roughly with the strip production line vertical direction on the narrow slit shape that forms and make the structure that they are provided with forming a line on the production line direction.
3, metal strip refrigerating unit as claimed in claim 2 is characterized in that the section of the inside edge of said nozzle becomes R shape or inclined plane shape.
4, as claim 2 or 3 described metal strip refrigerating units, it is characterized in that above-mentioned nozzle is to outside standing shape.
5, the metal strip refrigerating unit described in claim 4 is characterized in that being provided with 2 shower nozzles, and is configured in the both sides of metal strip width respectively.
6, metal strip refrigerating unit as claimed in claim 4 is characterized in that being provided with 3 shower nozzles, and one of them is configured on the substantial middle position of metal strip width, 2 remaining both sides that are configured in the metal strip width.
7, metal strip refrigerating unit as claimed in claim 4, it is characterized in that being provided with a plurality of cooling rollers, and be provided with 3 at least with above-mentioned roller in the shower nozzle that faces toward of initial cooling roller, wherein 1 showerhead configurations is at the substantial middle position of metal strip width, 2 remaining both sides that are configured in the metal strip width.
8, metal strip refrigerating unit as claimed in claim 4, it is characterized in that being provided with a plurality of cooling rollers, wherein, at least the cooling roller to the proparea is provided with 3 shower nozzles, on the substantial middle position that 1 is configured in the metal strip width, 2 remaining both sides that are configured in the metal strip width, the cooling roller to the back zone disposes 2 shower nozzles simultaneously, and is configured in the both sides of metal strip width respectively.
9, metal strip refrigerating unit as claimed in claim 8, when the metal strip of shower nozzle on production line of when it is characterized in that at least with initial cooling roller begins to contact with the cooling roller, just the retracted position of avoiding from wait is towards moving with the approaching direction of metal strip, and from when contact, when the amount of being pressed into of cooling roller increases, mobile shower nozzle, make the spacing distance of itself and metal strip keep certain, when metal strip does not contact with the cooling roller, shower nozzle is moved, up to above-mentioned retracted position.
10, metal strip refrigerating unit as claimed in claim 8, it is characterized in that when setting a plurality of cooling roller, except some shower nozzles that face toward with initial cooling roller at least, other shower nozzle is designed to when the roller maximum amount of being pressed into shower nozzle length for maximum, and the metal strip on production line is when beginning to contact with this cooling roller, the volume return of avoiding from wait is put towards moving with the approaching direction of metal strip, even also do not move when the amount of being pressed into of this cooling roller increases then, and just make shower nozzle be on the above-mentioned retracted position wait to avoid at metal strip with before this cooling roller does not contact.
11, metal strip refrigerating unit as claimed in claim 10,
It is characterized in that its roller amount of being pressed into of cooling roller in proparea is big more when a plurality of cooling roller of configuration.
12, metal strip refrigerating unit as claimed in claim 10, it is characterized in that under the platform of the field of a plurality of cooling rollers of configuration, its roller amount of being pressed into of the cooling roller in proparea is big more, simultaneously, for cooling off the shower nozzle that rollers face toward with these, the shower nozzle in proparea is measured the cooling of its gas injection become big more.
13, metal strip refrigerating unit as claimed in claim 12,
It is characterized in that when roller cylindrical shell length direction has a plurality of shower nozzle, the amount of movement of these shower nozzles on cooling roller travel direction had nothing in common with each other, thereby make the interval between each shower nozzle and the cooling roller also different on roller cylindrical shell length direction.
14, metal strip refrigerating unit as claimed in claim 1, it is characterized in that by being positioned at the metal strip both sides and above-mentioned shower nozzle that constitute in a plurality of head body that the roller length direction is connecting, have a plurality of sections that the above-mentioned head body that is connecting is segmented on the metal strip travel direction, make each jet hole position of shower nozzle be designed on the roller length direction, stagger simultaneously in the upstream and downstream section.
15, metal strip refrigerating unit as claimed in claim 1, it is characterized in that by being positioned at the metal strip both sides and above-mentioned shower nozzle that constitute in a plurality of head body that the roller length direction is connecting is, be between the adjacent head body and on the metal strip travel direction, be provided with staggering being separately positioned on jet hole position on above-mentioned each head body that is connecting.
16, metal strip refrigerating unit as claimed in claim 1,
It is characterized in that at the cooling roller with before metal strip contact, the tension force of this metal strip is improved, thereby make dimensionally stable when contacting.
17, metal strip refrigerating unit as claimed in claim 5, it is characterized in that it is that wide variety link information device, metal strip both sides position sensor, metal strip width sheet material thermometer more than 1 are configured in cooling roller inlet side, and obtain the information of wide variety part and wide variety amount according to the information that they survey yesterday.The shower nozzle that the width end is used is set on the end of metal strip width thus.
18, metal strip refrigerating unit as claimed in claim 17, it is characterized in that when special the entering of the different connection portion of sheet material width, from the production line inlet side just begin to early stage information followed the tracks of, when sheet material width during from narrow broadening, this special enter cooling roller inlet side before, just the shower nozzle that the width end is used is set on the width end of the big metal strip of width, on the other hand, when the sheet material width leniently narrows down, this special enter cooling roller inlet side after, just the shower nozzle that the width end is used is set on the width end of the narrow genus band of width.
19, metal strip refrigerating unit as claimed in claim 5,
It is characterized in that it is that sheet material thermometer with the metal strip width is configured in cooling roller outlet side, the information that records according to it will be arranged on the shower nozzle of using the width end in the body refrigerating unit respectively and be set on the metal strip width end.
20, a kind of metal strip refrigerating unit as claimed in claim 5,
It is characterized in that it is that sheet material thermometer with the metal strip width is configured in cooling roller outlet side,, adjust the cooling gas pressure of shower nozzle of width end of gas quench system or gas flow according to its information.
21, a kind of metal strip refrigerating unit as claimed in claim 5,
It is characterized in that it is the outlet side that the sheet material thermometer of metal strip width is provided in the cooling roller, according to its information, the shower nozzle that the width end of gas quench system is used is set on the metal strip width end, and adjusts the cooling gas pressure of these shower nozzles or flow.
22, metal strip refrigerating unit as claimed in claim 1, it is characterized in that this metal strip refrigerating unit also has the assist gas refrigerating unit and adjusts the cooling gas pressure of these shower nozzle inside or the gas setting device of flow, above-mentioned assist gas refrigerating unit has with metal strip and is configured in shower nozzle above-mentioned cooling roller outlet side, that have the gas injection more than 2 to use at this metal strip sheet material width to landing, and the shower nozzle of the both sides at least in these shower nozzles can move freely on the metal strip width.
23, the metal strip refrigerating unit described in claim 22,
It is characterized in that in the shower nozzle in the assist gas refrigerating unit that 2 shower nozzles that metal strip width end is at least used can move freely at the metal strip width.
24, metal strip refrigerating unit as claimed in claim 22, it is characterized in that being configured in the shower nozzle that is positioned at the metal strip both sides in the shower nozzle of assist gas refrigerating unit of cooling roller outlet side at least and be and be used in a plurality of head body that the metal strip width connecting and constitute, what at least 1 shower nozzle can move freely at the metal strip width in these shower nozzles simultaneously.
25, metal strip refrigerating unit as claimed in claim 22, it is characterized in that being configured in the shower nozzle that is positioned at the metal strip both sides in the shower nozzle of assist gas refrigerating unit of cooling roller outlet side at least and be at the metal strip travel direction and separate structure more than 2, and these shower nozzles can move on the metal strip width independently of one another.
26, metal strip refrigerating unit as claimed in claim 24,
It is characterized in that this refrigerating unit installing to the nozzle of metal strip jet flow stream, than the width of this metal strip the narrow shower nozzle more than 2 and make this shower nozzle with vertical direction of metallic strip surface and/or the transfer table that on this metal strip width, moves.
27, metal strip refrigerating unit as claimed in claim 26 is characterized in that when the metal strip width has 2 or 3 above-mentioned shower nozzles, and its transfer table can move with the vertical direction in metallic surface with on the metal strip width.
28, metal strip refrigerating unit as claimed in claim 26, it is characterized in that when the metal strip width has 3 above-mentioned shower nozzles, make transfer table that central shower nozzle moves can only with the vertical direction of metallic strip surface on move, make transfer table that left and right sides shower nozzle moves can with vertical direction of metallic strip surface and metal strip width on move.
29, metal strip refrigerating unit as claimed in claim 28, the strip production line that it is characterized in that above-mentioned pulley type refrigerating unit is level or vertical.
30, metal strip refrigerating unit as claimed in claim 22, it is characterized in that this assist gas refrigerating unit is to have installing to the nozzle of metal strip jet flow stream, than this metal strip width narrow 2 with upper nozzle with make this shower nozzle can be with vertical direction of metallic strip surface and/or the transfer table that on this metal strip width, moves.
31, metal strip refrigerating unit as claimed in claim 30 is characterized in that this assist gas refrigerating unit is when above-mentioned shower nozzle and transfer table are arranged, and these shower nozzles and transfer table are arranged on the positive and negative two sides of metal strip.
32, metal strip refrigerating unit as claimed in claim 31 is characterized in that above-mentioned strip production line is level or vertical.
33, metal strip refrigerating unit as claimed in claim 22,
It is characterized in that this assist gas refrigerating unit be have be provided with parallel with this metallic strip surface of strip production line and also can with the vertical direction of the flow direction of this production line on move running gear, this production line direction set dressing on above-mentioned running gear, be provided with shower nozzle nozzle, narrower than metal strip width to the metal strip jet flow stream, the travel mechanism that above-mentioned running gear is moved, flexible component or collapsible joint are being set on the part of above-mentioned gas supply-pipe portion simultaneously.
34, metal strip refrigerating unit as claimed in claim 33 is characterized in that installing at least respectively in the positive and negative two sides of metal strip running gear in the said structure, is installed in the shower nozzle on this running gear and is arranged on flexible component on this shower nozzle or the gas supply pipe road of telescopic joint.
35, a kind of metal strip refrigerating unit as claimed in claim 34 is characterized in that also having the gas ejection shower nozzle that is fixed on the metal strip width substantial middle position.
36, metal strip refrigerating unit as claimed in claim 35,
It is characterized in that strip production line is level or vertical.
37, a kind of metal strip refrigerating unit as claimed in claim 22,
It is characterized in that disposing wide variety link information device, metal strip two side portions position sensor and the metal strip width sheet material thermometer more than 1 at cooling roller inlet side, obtain the information of wide variety part and wide variety amount according to its information, thereby the shower nozzle that the metal strip width end of shower nozzle that the width end of gas quench system is used and assist gas refrigerating unit is used is set to respectively on the end of metal strip width.
38, metal strip refrigerating unit as claimed in claim 37, it is characterized in that when different this distinguished point of connection portion of sheet material width enters, begin just to follow the tracks of information in early stage from the production line inlet side, when sheet material width during from narrow broadening, before this distinguished point enters cooling roller inlet side, just 2 shower nozzles using of the metal strip width end of shower nozzle that the width end of gas quench system is used and assist gas refrigerating unit are set on the end of the big metal strip width of width, in addition, when strip width leniently narrows down, after this distinguished point enters cooling roller inlet side, just the shower nozzle in proparea is set on the narrower metal strip width end of strip width.
39, a kind of metal strip refrigerating unit as claimed in claim 22,
It is characterized in that setting metal strip width sheet material thermometer at the outlet side of assist gas refrigerating unit, according to its information, 2 shower nozzles that the shower nozzle that gas quench system width end is used and the metal strip width end of assist gas refrigerating unit are used are set on the end of metal strip width.
40, a kind of metal strip refrigerating unit as claimed in claim 22, it is characterized in that setting metal strip width sheet material thermometer at assist gas refrigerating unit outlet side, according to its information, the cooling gas pressure and the gas flow of each shower nozzle of adjustment gas quench system and each shower nozzle of assist gas refrigerating unit.
41, a kind of metal strip refrigerating unit as claimed in claim 22, it is characterized in that setting metal strip width sheet material thermometer at assist gas refrigerating unit outlet side, according to its information, 2 shower nozzles that the shower nozzle that the width end of gas quench system is used and the metal strip width end of assist gas refrigerating unit are used are set to respectively on the metal strip width end, and adjust the cooling gas pressure or the gas flow of each shower nozzle.
42, metal strip refrigerating unit as claimed in claim 1 is characterized in that also comprising: the metal strip two side portions position sensor that detects the sheet material two side portions of above-mentioned metal strip; Device for moving and adjusting that moves at the roller length direction with the shower nozzle of adjusting in the above-mentioned shower nozzle that can move freely at the roller length direction and the nozzle position control calculation apparatus of controlling this device for moving and adjusting according to the detection signal that above-mentioned metal strip two is surveyed the part position sensors; With the advance and retreat setting device of on cooling roller travel direction, adjusting above-mentioned nozzle position according to the position signal of cooling roller; With the outlet side that is configured in the cooling roller and detect the metal strip width sheet material thermometer of the sheet material width temperature distribution of above-mentioned metal strip, with according to the temperature deviation of the temperature signal of this sheet material thermometer calculation with respect to the target plate temperature distribution, and adjust the cooling gas pressure of each shower nozzle inside or the sheet material temperature control calculation apparatus of gas flow according to this temperature deviation.
43, a kind of metal strip refrigerating unit as claimed in claim 42, it is characterized in that having with metal strip be configured in landing above-mentioned cooling roller outlet side, at the sheet material width of above-mentioned metal strip shower nozzle more than 3 is set, and assist gas refrigerating unit that at least 1 shower nozzle can move freely at the metal strip width in these showerheads and the metal strip width sheet material thermometer that is configured in this assist gas refrigerating unit outlet side.
44, metal strip refrigerating unit as claimed in claim 43 is characterized in that in the shower nozzle of above-mentioned assist gas refrigerating unit that 2 shower nozzles that both sides are at least used can move freely at the metal strip width respectively.
45, metal strip refrigerating unit as claimed in claim 44, it is characterized in that this gas quench system and/or assist gas body refrigerating unit, the nozzle width Be of the shower nozzle of both sides satisfies the relation of following numerical expression 1 and numerical expression 2, and the nozzle width Bc of the showerhead of central part satisfies the relation of following numerical expression 3.
[numerical expression 1] 6 ≤ Be - ( Δω 2 - 0 . 9 Lo V S ) ≤ 4 . 5
T＜1.3mm in the formula
[numerical expression 2] 12 t - 9 . 6 ≤ Be - ( Δω 2 - 0 . 9 Lo V S ) ≤ 22 t + 16 . 4
T 〉=1.3mm in the formula
Be: nozzle width (mm)
T: the sheet metal thickness of metal strip (mm)
Δ ω: metal strip wide variety amount (mm)
Lo: produce line length between the roller of the heat treatment furnace that refrigerating unit is later
Degree (m)
V: the spray of cooling roller tube length degree (or metal strip width) direction
Translational speed (mm/min)
S: line speed (mpm)
[numerical expression 3]
0.09W Be in≤Bc≤0.27W formula: nozzle width (mm)
W: metal strip width (mm)
46, metal strip refrigerating unit as claimed in claim 42 is characterized in that, described gas quench system be by with in the described shower nozzle at least a plurality of head body of on the drum length direction, coupling together of the shower nozzle of metal strip both sides form.
47, a kind of metal strip refrigerating unit as claimed in claim 46, it is characterized in that having with metal strip and be configured in above-mentioned cooling roller outlet side to landing, be provided with 3 with upper nozzle at above-mentioned metal strip sheet material width, and in these shower nozzles at least the shower nozzle of metal strip both sides be to be used in a plurality of head body that connecting on the metal strip width to form, and the assist gas refrigerating unit that can move freely at the metal strip width and the gas setting device of the cooling gas pressure of adjusting each shower nozzle inside or flow.
48, metal strip refrigerating unit as claimed in claim 47, it is characterized in that when the shower nozzle that is positioned at the metal strip both sides of this gas quench system and/or assist gas refrigerating unit forms with 3 above head body respectively, wherein outermost showerhead body width B eo satisfies the relation of following numerical expression 4, and wherein, the head body width B ec of central authorities satisfies the relation of following numerical expression 5 and numerical expression 6, and wherein inboard head body width B ei satisfies the relation of following numerical expression 7, and the head body width B c that is positioned at metal strip substantial middle position on the other hand satisfies the relation of following numerical expression 3.
[numerical expression 4]
Beo≥ΔWu/2
In the formula: Wu: the sheet material wide variety amount (mm) of the sheet material width of metal strip connection portion during from narrow broadening
[numerical expression 5]
6≤Bec≤45
T＜1.3mm in the formula
[numerical expression 6]
12t-9.6≤Bec≤22t+16.4
T 〉=1.3mm in the formula
T: the sheet metal thickness of metal strip (mm)
[numerical expression 7]
Bei≥ΔWd/z
Δ Wd in the formula: the sheet material wide variety amount (mm) when the sheet material width of metal strip connection portion leniently narrows down
[numerical expression 3]
0.09W≤Bc≤0.27W
Bc: nozzle width (mm)
W: the sheet material width (mm) of metal strip
49, metal strip refrigerating unit as claimed in claim 48,
It is characterized in that the cooling roller that uses in this device is that portion is provided with many coolant channel that form at grade within it.
50, metal strip refrigerating unit as claimed in claim 49,
It is characterized in that the cooling roller that uses in this device is that a plurality of cooling rollers are set on the strip production line direction, and when these roller surfaces being contacted with metal strip cool off this metal strip, be to make the coolant flowing direction in coolant channel of each cooling roller in per 1 roller, reversally supply with this refrigerant.
51, metal strip refrigerating unit as claimed in claim 1, it is characterized in that, described shower nozzle is to be used in the shower nozzle that a plurality of head body that the metal strip width connecting constitute, what at least 1 shower nozzle can move freely at the metal strip width in these shower nozzles simultaneously.
52, metal strip refrigerating unit as claimed in claim 1, it is characterized in that, described shower nozzle is by being separated into the shower nozzle that the head body more than 2 constitutes on the metal strip travel direction, and these shower nozzles can move on the metal strip width independently of one another simultaneously.
53, metal cools device as claimed in claim 1 is characterized in that, also comprise make described shower nozzle with vertical direction of metallic strip surface and/or the transfer table that moves at this metal strip width.
54, metal strip refrigerating unit as claimed in claim 53 is characterized in that, above-mentioned shower nozzle and transfer table are arranged on side of metal strip or on its tow sides.
55, metal cools device as claimed in claim 53 is characterized in that, above-mentioned strip production line is level or vertical.
56, metal strip refrigerating unit as claimed in claim 1, it is characterized in that, also have: parallel with this metallic strip surface on the strip production line and can be at the running gear that moves with the vertical direction of the flow direction of this production line, along the configuration of this production line direction, be installed on this running gear and the travel mechanism shower nozzle narrower than this metal strip width, that above-mentioned running gear is moved to the nozzle of metal strip jet flow stream be set, in an one of above-mentioned gas supply line, be provided with simultaneously deflection around property parts or telescopic joint.
CN 93109047 1992-06-23 1993-06-23 Apparatus and method for cooling of metallic belt Expired - Lifetime CN1040130C (en)

Applications Claiming Priority (24)

Application Number Priority Date Filing Date Title
JP18744192 1992-06-23
JP187439/92 1992-06-23
JP187440/92 1992-06-23
JP18743992 1992-06-23
JP18744092 1992-06-23
JP187441/92 1992-06-23
JP5112488A JPH06306485A (en) 1993-04-16 1993-04-16 Heat treating device for metallic belt
JP112,488/93 1993-04-16
JP5152636A JPH06340928A (en) 1993-06-01 1993-06-01 Cooling roll and roll cooling apparatus using the same roll
JP5152634A JPH06340913A (en) 1993-06-01 1993-06-01 Gas-cooling device for metal strip
JP15263593A JP3191495B2 (en) 1993-06-01 1993-06-01 Gas cooling system for metal strip
JP152636/93 1993-06-01
JP152634/93 1993-06-01
JP152635/93 1993-06-01
JP156361/93 1993-06-03
JP5156362A JP2979903B2 (en) 1992-06-23 1993-06-03 Metal strip cooling method
JP5156361A JP2979902B2 (en) 1992-06-23 1993-06-03 Metal strip cooling device
JP156362/93 1993-06-03
JP5173682A JP2979908B2 (en) 1992-06-23 1993-06-22 Metal strip cooling device
JP173682/93 1993-06-22
JP173684/93 1993-06-22
JP5173683A JP2906927B2 (en) 1993-06-22 1993-06-22 Metal strip cooling device
JP5173684A JPH0711346A (en) 1993-06-22 1993-06-22 Device for cooling of strip metal with gas
JP173683/93 1993-06-22

Publications (2)

Publication Number Publication Date
CN1088621A CN1088621A (en) 1994-06-29
CN1040130C true CN1040130C (en) 1998-10-07

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CN 93109047 Expired - Lifetime CN1040130C (en) 1992-06-23 1993-06-23 Apparatus and method for cooling of metallic belt

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KR (1) KR0159121B1 (en)
CN (1) CN1040130C (en)
CA (1) CA2116230A1 (en)
DE (1) DE69324566T2 (en)
RU (1) RU2120482C1 (en)
WO (1) WO1994000605A1 (en)

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CA2116230A1 (en) 1994-01-06
EP0614992B1 (en) 1999-04-21
KR0159121B1 (en) 1999-01-15
EP0614992A1 (en) 1994-09-14
WO1994000605A1 (en) 1994-01-06
RU94016952A (en) 1997-02-27
RU2120482C1 (en) 1998-10-20
DE69324566T2 (en) 1999-10-28
DE69324566D1 (en) 1999-05-27
CN1088621A (en) 1994-06-29

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