CN104785551A - Steel plate cooling device - Google Patents
Steel plate cooling device Download PDFInfo
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- CN104785551A CN104785551A CN201510178849.2A CN201510178849A CN104785551A CN 104785551 A CN104785551 A CN 104785551A CN 201510178849 A CN201510178849 A CN 201510178849A CN 104785551 A CN104785551 A CN 104785551A
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Abstract
A steel plate cooling device comprises upper side cooling equipment and lower side cooling equipment. A plurality of atomizing cooling nozzles are evenly arranged on the upper side cooling equipment and the lower side cooling equipment. The atomizing cooling nozzles on the upper side cooling equipment vertically correspond to the atomizing cooling nozzles on the lower side cooling equipment. The included angle between each atomizing cooling nozzle and the forwarding direction of a steel plate ranges from 30 degrees to 75 degrees. The device further comprises an induction and measurement device and a control device. By means of the cooling device, economic burden can be reduced, and the structure of the final cooling device is high in consistency.
Description
The application is the applying date is on November 07th, 2013, and application number is 201310545017.0, and denomination of invention is the divisional application of the patent application of " cooling device of steel plate ".
Technical field
The application relates to a kind of surface of steel plate process field, particularly a kind of hot rolled steel plate cooling device and cooling means.
Background technology
The manufacturing process of steel plate is generally through heating, roughing, finish rolling, cooling, winding five step operation complete.The cooling of its light plate is wherein important step, and the equipment that cooling procedure uses also is one of nucleus equipment of production process, the effect of cooling be by mill milling after steel plate be cooled to the temperature that presets, cooling effect can determine the final performance of steel plate.
In cooling procedure, we always wish that the cooldown rate of monoblock steel plate all sites is identical, and this considers that the uniformity of cooling rate determines the uniformity of its performance, thus form identical institutional framework.At present, steel plate width direction cooling uniformity has done sufficient consideration, but does not solve very well all the time for the rate of temperature fall of steel plate both ends (i.e. steel plate head and rear) and the nonsynchronous problem of rate of temperature fall of steel plate interlude.Its Producing reason is both ways: one is because steel plate is in the operation of rolling, and head-tail mill speed is usually less than steel plate interlude, causes head-tail temperature lower than in the middle part of steel plate; Two is in Cooling Process for Steel Plate Based, contacts the while that head-tail being equivalent to three with cooling water, makes two ends faster than interlude cooling.Prior art, owing to cannot overcome above-mentioned technical problem, also just can not ensure steel plate Homogeneous cooling on the whole, because two parts temperature difference brings the difference of plate property, the tissue of steel plate, performance can be caused also to present larger otherness.
One of technological means of current this problem of solution is by the material of direct for final products topping and afterbody, but the waste of material that these means are brought is self-evident, and does not also have certain regularity to say for the dimensions length of excision.
Also there is technology to show, solved the temperature difference of section and interlude end to end by Automated condtrol means, namely reduce the use amount of section cooling water end to end, to expect, steel plate head rear temperature and interlude are consistent.But practice shows, still there is the even problem of inhomogeneous cooling in this technique, such as, still inevitably shows the martensitic structure of fine acicular near head and afterbody end points, no matter how to control the hydraulic pressure at two ends, still be difficult to overcome this problem, thus the tissue at two ends and interlude can not be made to keep identical.
In addition, also have a bit, in actual production, keep the steel billet of high temperature to react with the oxygen in air before rolling, form the compounds such as iron oxide, after reaction, one deck oxide scale layer can be generated at billet surface, also referred to as scale or firecoat.First general industry carries out de-scaling to the steel billet being in high temperature, to avoid being pressed on the surface of final products by roll in the operation of rolling, thus reduces the surface quality of product.But for the steel plate just past hot rolling, due to its still remain table and high temperatures, even if carried out de-scaling process to steel billet in abovementioned steps, still inevitably with oxidizing gas in air or in cooling procedure with cooling water or cooling water steam contact process, surface generating portion oxidation again, again form oxide scale layer, the industrial removal problem be faced with such oxide scale layer.
A kind of method for controlling surface chromatic aberration of hot rolling acid-cleaning plate steel has been disclosed in prior art, the method is in rough rolling process, with outlet, descaling spray nozzle is set respectively by the entrance at roughing mill, thus in the operation of rolling, every time can be adopted to carry out high-pressure water descaling at roughing mill entrance side, and carry out high-pressure water descaling further by between mm finishing mill unit frame, thus the scenery with hills and waters line aberration of hot rolling acid-cleaning plate belt steel surface can be eliminated, improve the surface quality of product.But the problem of said method is or cannot avoids have employed residual oxide scale layer, thus make remaining firecoat be retained in final products table and, thus cannot meet the production of great surface quality product.
Another prior art discloses the method using low hydraulic pressure to carry out de-scaling, but shows that the method still exists firecoat and goes aliquant problem in actual production by experiment.
Namely the technical scheme of the application meets the cooling to steel plate, can meet again the removal to the scale that surface of steel plate produces.
We consider due to steel plate before being rolled through the process of a de-scaling, therefore, the oxide skin produced in the operation of rolling, thickness is little, general thickness is between 50 μm to 100 μm, for the scale of this kind of generation, when using high hydraulic pressure to process, the extra financial burden that its high hydraulic equipment used produces is heavy.
In this application, namely we consider the low cost utilizing low hydraulic pressure, also considers the validity that high hydraulic pressure is removed remaining firecoat.Namely the hydraulic pressure of two or more different pressures is adopted to realize de-scaling.
Concrete operation method: first spray the steel plate after rolling with low hydraulic pressure, utilizes cooling water to steel plate produced deformation different from the conductivity of oxide scale layer to heat, oxide scale layer and steel plate is peeling.
Come off from steel plate for only using low hydraulic pressure to be not enough to make oxide scale layer this part, our design is in cooling, adopt the mode strengthening hydraulic pressure gradually.The object come off completely is reached to make the oxide scale layer sticked on steel plate with different adhesive force.
The application illustrates that adopted mode cooling section is divided into three parts, thin speech it, be exactly cooling section first three/mono-distance in, atomizing cooling nozzle adopts low pressure to cool steel plate, in 2/1 to three/3rds distances, atomizing cooling nozzle is pressed in adopting and is cooled further steel plate, and in the distance at three/bis-to ending place, atomizing cooling nozzle adopts high pressure finally to cool steel plate.Wherein the hydraulic pressure control of the atomizing cooling nozzle of Part I is under 30 Palestine and Israels, but can not lower than 5 bar.Wherein the hydraulic pressure control of the atomizing cooling nozzle of Part II is under 50 Palestine and Israels, but can not lower than 30 bar.Wherein the hydraulic pressure control of the atomizing cooling nozzle of Part III is being not less than 100 bar, but can not higher than 200 bar, otherwise the high cost produced, and further deformation can be produced to thinner steel plate, thus affect product final mass.
Equally, also cooling section can be divided into four segments, five segments, or more segment.But no matter whole cooling device is divided into several part artificially, its basic theory and design theory is identical, the pressure that after will ensureing exactly, a segment all sprays than last segment nozzle is slightly high, but, the pressure exceeded presents certain regularity, and must design in certain effective range, industrial design, from II segment in N-1 segment, the pressure proportional of the atomizing cooling nozzle that the pressure of the atomizing cooling nozzle that each segment uses and the last segment of this segment use controls within the scope of 1.1-1.5:1, preferred proportion is 1.25.But should ensure to be not less than 100 bar for the pressure of atomizing cooling nozzle in N segment, higher than 200 bar, and can not will ensure that the size of its pressure need higher than the pressure of the atomizing cooling nozzle of segment second from the bottom simultaneously.
, also find in practice, when the steel plate of different-thickness is processed meanwhile, the pressure of atomizer is opened non-the smaller the better, also to be non-ly the bigger the better, but relevant to the thickness of steel plate, analyze its reason and be that the steel plate of different-thickness is different at the radiating rate of cooling procedure.There is not technology to show between thickness and the pressure of atomizer used in prior art and should keep certain relation.The application's research shows, when the steel plate thick to 20-50mm processes, the ratio of the first segment atomizing cooling nozzle pressure and steel plate thickness is be advisable between 0.5-0.8,15mm is less than for thickness, but when the steel plate being not less than 5mm processes, the ratio of the first segment atomizing cooling nozzle pressure and steel plate thickness is less than 0.4, but will ensure that the minimum pressure of atomizing cooling nozzle can not lower than 5 bar.
And for the angle between atomizing cooling nozzle and steel plate, for the initial segment, the size of angle can selection and comparison smaller, and for terminal section, the size of angle can selection and comparison better greatly, the span of angle should be good at 30-75 degree.Preferred version is: for being divided into by cooling section in the scheme of three segments, for I segment, the angle of atomizing cooling nozzle is chosen as 30-45 degree, for II segment, atomizing cooling nozzle angle is chosen as 45-55 degree, for III segment, atomizing cooling nozzle angle is chosen as 60-75 degree.For scheme cooling section being divided into N number of segment, preferred version is that in (N-1) segment, atomizing cooling nozzle angle increases successively than the angle of atomizing cooling nozzle in (N-2) segment, such object is the hydraulic pressure in order to increase gradually between nozzle exit pressure and steel plate, to remove the oxide scale layer that surface of steel plate produces better, the angle increased is advisable with 3-10 degree, be preferably 3-5 degree, but should ensure that the angle of all segments should ensure between 30-75 degree.
For the improvement project of the application's Part II, its economy produced also is considerable.Decrease high pressure nozzle equipment over half.For the technique only using high pressure nozzle, cost reduces, and the clearance of the firecoat that enterprise more pays close attention to improves.For the technique only using low-pressure nozzle, the clearance of the scale that enterprise more pays close attention to relatively also improves.Controlling also is eaily, only pre-set program need be write.
Summary of the invention
The equipment that the application uses can improve on existing common various steel plate cooling devices.To overcome above-mentioned mentioned various technical problems.
First, as one of parts requisite on cooling device " nozzle ", in this application, what we manageed it order ground selects atomizing cooling nozzle, and this nozzle has conventional understanding in this area, there is no particular meaning.Select the object of atomizing cooling nozzle to be to select current directly to the unstability easily produced during steel plate process for avoiding, and atomizing cooling nozzle have higher controllability.Therefore, in this application, if no special instructions, the nozzle occurred is atomizing cooling nozzle.
In addition, for the ease of speed and the stability of controlled cooling model process, the basic setup mode of cooling device is for comprising upper and lower both sides cooling device.I.e. upside cooling device, for cooling at the upper surface of cooling segment to hot rolled steel plate; Downside cooling device, for cooling at the lower surface of cooling segment to hot rolled steel plate.Upper and lower side cooling device is evenly provided with several atomizing cooling nozzles, spacing distance between the quantity of nozzle, nozzle is also without clear limit, keep the spacing between nozzle identical, such as controllable quantity is within the scope of 10-100, the industrial equipment directly selected in existing enterprise, in addition, the atomizing cooling nozzle one_to_one corresponding in vertical direction ensured on the cooling device of upper and lower both sides is also needed.
In general, hot rolled steel plate is when just entering cooling section, if when only using atomizing cooling nozzle to lower the temperature to steel plate, still the problem contacted with cooling water while that head and afterbody can not being avoided to be equivalent to there are three, cause the cooling velocity of cooling velocity higher than interlude of head and afterbody, when cooling rate cannot be consistent, the otherness in steel plate tissue, performance namely can be produced.
Therefore, one of the object of the application is the uniformity realizing steel plate two ends and interlude rate of temperature fall.
In other words, exactly when steel plate carries out cooling section, by controlling the cooling water inflow during cooling of hot rolled steel plate head, afterbody and interlude, reducing the temperature difference of hot rolled steel plate head, afterbody and interlude, improving the uniformity of monoblock hot rolled steel plate rate of temperature fall.
The means specifically taked comprise: on the control appliance of cooling device, and use opening and closing of control appliance Control Nozzle, equally, control appliance also can control the ejection pressure of each group atomizing cooling nozzle.
For stating conveniently, the nozzle that upper and lower both sides cooling device is corresponding on upright position can be defined as first group of atomizing cooling nozzle, second group of atomizing cooling nozzle by successively ... n-th group of atomizing cooling nozzle.
On cooling device, measurement of inductance equipment is installed, it is arranged on the initial segment position of upside cooling device, for induction heat rolled steel plate head whether on upright position more than first group of atomizing cooling nozzle, the afterbody that also may be used for induction heat rolled steel plate whether on upright position more than first group of atomizing cooling nozzle.
During work, hot rolled steel plate moves forward in substantially horizontal directions under the drive of lathe, the measurement of inductance equipment being arranged on cooling device the initial segment position, upside is started working, the head of induction heat rolled steel plate whether on upright position more than first group of atomizing cooling nozzle, when measurement of inductance equipment senses that the head of hot rolled steel plate exceedes, pass the signal along to control appliance, control appliance will open first group of atomizing cooling nozzle, the water smoke that first group of nozzle starts to cool to hot rolled steel plate ejection.
For the opening time of second group of atomizing cooling nozzle, because the horizontal pace of hot rolled steel plate presets, therefore, do not need to reoffer extra measurement of inductance equipment, interval between only needing according to nozzle, the pace of hot rolled steel plate, just can calculate hot rolled steel plate head time more than second group of atomizing cooling nozzle on upright position, control appliance can when the head of hot rolled steel plate be more than second group of atomizing cooling nozzle, open second group of nozzle, the water smoke that second group of nozzle starts to cool to hot rolled steel plate ejection.
By that analogy, for the 3rd group, the 4th group ... until the opening time of last group atomizing cooling nozzle all can draw, rear several groups of nozzles also can be opened at corresponding time point by control appliance successively.
That is, only have when the upright position of steel plate head exceedes a certain group of nozzle, the switch of the nozzle be exceeded just can be opened.And eject in order to avoid nozzle to the end face of steel plate the cooling velocity that cooling water smoke affects steel plate head, nozzle should not spray with direction vertically downward, but should with the angle tilted to the later interlude area spray atomized water of steel plate head, the angle tilted can adjust according to actual conditions, it is good for generally making the angle of spray angle and steel plate direction of advance remain on 30-75 degree, is better with 30-45 degree.
In general the angle of inclination of all nozzles is set to identical, but sometimes in order to reach better effect, such as in hereafter mentioned de-scaling effect, the angle of spray angle and steel plate direction of advance should be made better larger for the nozzle that hydraulic pressure is high, for this respect content we will be explained in more detail hereinafter.But for the equipment of angle, it should be noted that and cooling water will be avoided to be sprayed onto on the end face of steel plate.
And for lasting advancing hot rolled steel plate, nozzle can keep stable state, do not need further adjustment.And when afterbody close to steel plate, whether measurement of inductance equipment can continue the upright position of induction steel plate tail more than first group of nozzle, when first group of nozzle that the upright position of the afterbody sensing steel plate exceedes, measurement of inductance equipment by the signal transmission that senses to control appliance, control appliance is by cut out first group of atomizing cooling nozzle, and first group of nozzle stops the water smoke spraying cooling to hot rolled steel plate.
For the shut-in time of second group of atomizing cooling nozzle, in like manner known, because the horizontal pace of hot rolled steel plate presets, therefore, extra measurement of inductance equipment is not needed yet, interval between only needing according to nozzle, the pace of hot rolled steel plate, just can calculate hot rolled steel plate afterbody time more than second group of atomizing cooling nozzle on upright position, control appliance can when the afterbody of hot rolled steel plate be more than second group of atomizing cooling nozzle, close second group of nozzle, the water smoke that second group of nozzle stops cooling to hot rolled steel plate ejection.
By that analogy, for the 3rd group, the 4th group ... until the shut-in time of n-th group of atomizing cooling nozzle all can draw, rear several groups of nozzles also can be closed at corresponding time point by control appliance successively, until closed by n-th group of (i.e. last group) atomizing cooling nozzle, said method is at least successful in minimizing energy consumption.
For measurement of inductance equipment, for whether responding to the upright position of steel plate head more than first group of atomizing cooling nozzle, also for whether responding to the upright position of the afterbody of steel plate more than first group of atomizing cooling nozzle.And the control appliance of signal announcement that will obtain.Generally can select laser induced measurement device or other.
For control appliance, generally select PLC device, i.e. programmable logic controller (PLC) (programmable logic controller), its inner program storage, for actuating logic computing, the operations such as sequential control.
Advantage for employing such scheme is self-evident, such as to the minimizing of energy consumption, although little for the consumption impact of Water Energy, this is that what adopt is all recirculated water due to general on industrial equipment, but be obvious for the energy resource consumption that high-tension apparatus brings, therefore the cost of low-pressure water is lower.Moreover, for final products---the controlling of steel plate head and the neighbouring tissue of afterbody, is very accurate, can obtains the tissue identical with interlude.And the improvement of existing equipment is also relatively easy to, do not need input cost too much, selected parts, such as atomizing cooling nozzle, measurement of inductance equipment, control appliance are also facile from the market.
For the further improvement of the application, content below describes in detail.
At least ensure that on the basis that hot rolled steel plate cooldown rate is consistent, if can also make the progressive of the application definitely to the removal of surface of steel plate oxide scale layer further.
Accompanying drawing explanation
Fig. 1 is the first structural representation of cooling device of steel plate.
Fig. 2 is the second structural representation of cooling device of steel plate.
In figure: 1---steel plate, 1-1---steel plate head, 1-2---steel plate tail, 2---upside cooling device, 3---downside cooling device, 4-1---first group of atomizing cooling nozzle, 4-n---n-th group of atomizing cooling nozzle, 5---measurement of inductance equipment, 6---control appliance.
Detailed description of the invention
Embodiment 1: as shown in Figure 1, cooling device of steel plate, for carrying out cooling processing to steel plate 1.Comprise upside cooling device 2 and downside cooling device 3, upside cooling device 2 and downside cooling device 3 are evenly provided with several atomizing cooling nozzles, and the angular range of atomizing cooling nozzle and steel plate 1 direction of advance is 30-75 degree (not shown).
Cooling device of steel plate also comprises measurement of inductance equipment 5, measurement of inductance equipment 5 is installed on the cooling device 2 of upside, whether the head 1-1 for responding to steel plate 1 exceedes first group of atomizing cooling nozzle 4-1 of upside cooling device and downside cooling device, and whether the head 1-1 for responding to steel plate 1 has exceeded n-th group of atomizing cooling nozzle 4-n of upside cooling device and downside cooling device.
Cooling device of steel plate also comprises control appliance 6, control appliance 6 is connected with measurement of inductance equipment 5, for receiving the signal on measurement of inductance equipment 5, simultaneously, control appliance 6 also controls all atomizing cooling nozzles on upside cooling device 2 and downside cooling device 3, namely control the opening and closedown of atomizing cooling nozzle, also control all atomizing cooling nozzles spray the size of hydraulic pressure.
Embodiment 2: as shown in Figure 2, cooling device of steel plate, for carrying out cooling processing to steel plate 1.Comprise upside cooling device 2 and downside cooling device 3, upside cooling device 2 and downside cooling device 3 are evenly provided with several atomizing cooling nozzles, and the angular range of atomizing cooling nozzle and steel plate 1 direction of advance is 30-75 degree (not shown).
Cooling device of steel plate also comprises measurement of inductance equipment 5, measurement of inductance equipment 5 is installed on the cooling device 2 of upside, whether the head 1-1 for responding to steel plate 1 exceedes first group of atomizing cooling nozzle 4-1 of upside cooling device and downside cooling device, and whether the head 1-1 for responding to steel plate 1 has exceeded n-th group of atomizing cooling nozzle 4-n of upside cooling device and downside cooling device.
Cooling device of steel plate also comprises control appliance 6, control appliance 6 is connected with measurement of inductance equipment 5, for receiving the signal on measurement of inductance equipment 5, simultaneously, control appliance 6 also controls all atomizing cooling nozzles on upside cooling device 2 and downside cooling device 3, namely control the opening and closedown of atomizing cooling nozzle, also control all atomizing cooling nozzles spray the size of hydraulic pressure.
In the cooling zone formed by upside cooling device and downside cooling device, its first three/mono-apart from interior (i.e. I region), low pressure atomizing cooling jet is set, 2/1 to three/3rds apart from interior (i.e. II region), middle pressure atomizing cooling nozzle is set, in the distance at three/bis-to ending place (i.e. III region), high-pressure atomization cooling jet is set.
Wherein, the hydraulic pressure of low pressure atomizing cooling jet is arranged within the scope of 5-30 bar, preferred 5-20 bar, more preferably 8-15 bar; The hydraulic pressure of middle pressure atomizing cooling nozzle is arranged within the scope of 30-50 bar, preferred 30-45 bar, more preferably 35-38 bar; The hydraulic pressure of high-pressure atomization cooling jet is arranged within the scope of 100-200 bar, preferred 120-160 bar, more preferably 120-130 bar.
Embodiment 3: cooling device of steel plate, for carrying out cooling processing to steel plate 1.Comprise upside cooling device 2 and downside cooling device 3, upside cooling device 2 and downside cooling device 3 are evenly provided with several atomizing cooling nozzles, and the angular range of atomizing cooling nozzle and steel plate 1 direction of advance is 30-75 degree.
Cooling device of steel plate also comprises measurement of inductance equipment 5, and measurement of inductance equipment 5 is installed on the cooling device 2 of upside, and whether the head 1-1 for responding to steel plate 2 exceedes first group of atomizing cooling nozzle of upside cooling device and downside cooling device.
Cooling device of steel plate also comprises control appliance 6, control appliance 6 is connected with measurement of inductance equipment 5, for receiving the signal on measurement of inductance equipment 5, simultaneously, control appliance 6 also controls all atomizing cooling nozzles on upside cooling device 2 and downside cooling device 3, namely control the opening and closedown of atomizing cooling nozzle, also control all atomizing cooling nozzles spray the size of hydraulic pressure.
Between the cooling zone formed by upside cooling device and downside cooling device, on average be divided into five segments, its first five/distance in, low pressure atomizing cooling jet is set, in 2/1 to five/5ths distances, mesolow atomizing cooling nozzle is set, in 3/2 to five/5ths distances, low pressure atomizing cooling jet is set, in 4/3 to five/5ths distances, mesohigh atomizing cooling nozzle is set, in the distance at five/tetra-to ending place, high-pressure atomization cooling jet is set.
Wherein, the hydraulic pressure of low pressure atomizing cooling jet is arranged within the scope of 5-30 bar, preferred 5-20 bar, more preferably 8-15 bar; The hydraulic pressure of mesolow atomizing cooling nozzle is arranged within the scope of 30-50 bar, preferred 30-45 bar, more preferably 35-38 bar; The hydraulic pressure of middle pressure atomizing cooling nozzle is arranged within the scope of 50-70 bar, preferred 55-65 bar, more preferably 60-65 bar; The hydraulic pressure of mesohigh atomizing cooling nozzle is arranged within the scope of 70-90 bar, preferred 75-85 bar, more preferably 80-85 bar; The hydraulic pressure of high-pressure atomization cooling jet is arranged within the scope of 100-200 bar, preferred 120-160 bar, more preferably 120-130 bar.
When using the device work described in embodiment 1-3, open measurement of inductance equipment 5, whether induction steel plate head 1-1 has exceeded first group of atomizing cooling nozzle 4-1 on upright position, when not exceeding, all atomizing cooling nozzles all process closed condition, and when steel plate head 1-1 is more than first group of atomizing cooling nozzle 4-1, first group of atomizing cooling nozzle 4-1 opened by control appliance 6, this group atomizing cooling nozzle 4-1 sprays cooling water smoke to steel plate 1, starts to lower the temperature to steel plate.For the opening time of second group of atomizing cooling nozzle, because the horizontal pace of hot rolled steel plate is pre-set, therefore, only according to the spacing distance between nozzle, the advance time of steel plate, just can calculate steel plate head in upright position the time more than second group of atomizing cooling nozzle, control appliance 6 can when the head 1-1 of hot rolled steel plate be more than second group of atomizing cooling nozzle, open second group of nozzle, second group of atomizing cooling nozzle starts the water smoke ejecting cooling to steel plate.The like, until last group (n-th group) atomizing cooling nozzle.
And when afterbody close to steel plate, whether measurement of inductance equipment 5 can continue the upright position of induction steel plate tail 1-2 more than first group of nozzle 4-1, when sensing first group of nozzle 4-1 that the upright position of steel plate tail 1-2 exceedes, measurement of inductance equipment 5 by the signal transmission that senses to control appliance 6, control appliance 6 is by cut out first group of atomizing cooling nozzle 4-1, and first group of atomizing cooling nozzle 4-1 stops the water smoke spraying cooling to hot rolled steel plate.
For the shut-in time of second group of atomizing cooling nozzle, because the horizontal pace of hot rolled steel plate presets, therefore, extra measurement of inductance equipment is not needed yet, interval between only needing according to nozzle, the pace of hot rolled steel plate, just can calculate hot rolled steel plate afterbody time more than second group of atomizing cooling nozzle on upright position, control appliance can when the afterbody of hot rolled steel plate be more than second group of atomizing cooling nozzle, close second group of nozzle, the water smoke that second group of nozzle stops cooling to hot rolled steel plate ejection.
By that analogy, for the 3rd group, the 4th group ... until the shut-in time of n-th group of atomizing cooling nozzle all can draw, rear several groups of nozzles also can be closed at corresponding time point by control appliance successively, until closed by last group atomizing cooling nozzle.
Claims (3)
1. a cooling device of steel plate, comprising: upside cooling device, and it cools at the upper surface of cooling segment to steel plate; Downside cooling device, it cools at the lower surface of cooling segment to steel plate; Upside cooling device and downside cooling device are evenly provided with several atomizing cooling nozzles, on upside cooling device and downside cooling device, the atomizing cooling nozzle installed is corresponding up and down, and the angular range of the direction of advance of atomizing cooling nozzle and steel plate is 30-75 degree; Measurement of inductance equipment, it is installed on the cooling device of upside, and whether the head for responding to steel plate exceedes first group of atomizing cooling nozzle of upside cooling device and downside cooling device; Control appliance, itself and measurement of inductance equipment connection, for receiving the signal on measurement of inductance equipment, and control opening and closedown of all atomizing cooling nozzles on upper and lower cooling device, and the hydraulic pressure size of all atomizing cooling nozzle ejections;
By upside cooling device and downside cooling device institute shape cooling zone between be on average divided into N number of segment (N, for being greater than 3, is less than the natural number of 10);
15mm is less than for thickness, but when the steel plate being not less than 5mm processes, the ratio of the first segment atomizing cooling nozzle pressure and steel plate thickness is less than 0.4, but will ensures that the minimum pressure of atomizing cooling nozzle can not lower than 5 bar.
2. cooling device of steel plate according to claim 1, is characterized in that N number of segment is three segments, four segments or five segments.
3. use the method that the equipment in claim 1-2 described in any one cools steel plate.
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| CN201510178849.2A CN104785551B (en) | 2013-11-07 | 2013-11-07 | Cooling device of steel plate |
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| CN201310545017.0A CN103567238B (en) | 2013-11-07 | 2013-11-07 | Cooling device of steel plate |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN103567238A (en) | 2014-02-12 |
| CN103567238B (en) | 2015-08-26 |
| CN104785550B (en) | 2018-07-20 |
| CN104785551B (en) | 2019-04-30 |
| CN104785550A (en) | 2015-07-22 |
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