CN203635639U - Steel plate cooling device - Google Patents
Steel plate cooling device Download PDFInfo
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- CN203635639U CN203635639U CN201320696687.8U CN201320696687U CN203635639U CN 203635639 U CN203635639 U CN 203635639U CN 201320696687 U CN201320696687 U CN 201320696687U CN 203635639 U CN203635639 U CN 203635639U
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- 238000001816 cooling Methods 0.000 title claims abstract description 239
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 141
- 239000010959 steel Substances 0.000 title claims abstract description 141
- 238000005259 measurement Methods 0.000 claims abstract description 31
- 238000000889 atomisation Methods 0.000 claims abstract description 8
- 230000006698 induction Effects 0.000 abstract description 6
- 239000012467 final product Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 19
- 239000000498 cooling water Substances 0.000 description 17
- 239000007921 spray Substances 0.000 description 13
- 230000003647 oxidation Effects 0.000 description 9
- 238000007254 oxidation reaction Methods 0.000 description 9
- 239000000779 smoke Substances 0.000 description 9
- 238000005096 rolling process Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000005098 hot rolling Methods 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- -1 iron oxide Chemical class 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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Abstract
The utility model discloses a steel plate cooling device which comprises upper-side cooling equipment and lower-side cooling equipment; a plurality of atomization cooling nozzles are uniformly arranged on the upper-side cooling equipment and the lower-side cooling equipment; the atomization cooling nozzles mounted on the upper-side cooling equipment and the lower-side cooling equipment are corresponding in an up and down way; an included angle between the atomization cooling nozzles and the forwarding direction of the steel plate is in the range of 30-70 degrees. The steel plate cooling device further comprises induction measurement equipment and control equipment. Through the adoption of the steel plate cooling device, the financial burden can be alleviated and the high consistency of a final product can be texturally kept.
Description
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 to complete through heating, roughing, finish rolling, cooling, the five step operations of reeling.Its light plate is cooling is wherein important step, and the equipment that cooling procedure is used is also one of nucleus equipment of production process, cooling effect is that the steel plate after mill milling is cooled to predefined temperature, and 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 is to consider that the uniformity of cooling rate has determined the uniformity of its performance, thereby forms identical institutional framework.At present, steel plate width direction cooling uniformity has been done sufficient consideration, but there is no all the time fine solution for the rate of temperature fall of steel plate both ends (being steel plate head and rear) and the nonsynchronous problem of rate of temperature fall of steel plate interlude.The reason of its generation is both ways: the one, and because steel plate is in the operation of rolling, head-tail mill speed is usually less than steel plate interlude, causes head-tail temperature lower than steel plate middle part; The 2nd, in Cooling Process for Steel Plate Based, head-tail is equivalent to three whiles and contacts with cooling water, makes two ends cooling faster than interlude.Prior art be owing to cannot overcoming above-mentioned technical problem, also just can not guarantee on the whole evenly cooling of steel plate, because two parts temperature difference is brought the difference of plate property, can cause the tissue of steel plate, performance also to present larger otherness.
One of technological means addressing this problem is at present by the material of direct 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, solve section and the temperature difference of interlude end to end by automation control device, 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, for example, near head and afterbody end points, still inevitably shows the martensitic structure of fine acicular, no matter how the hydraulic pressure at two ends controlled, still be difficult to overcome this problem, thereby can not make the tissue at two ends keep identical with interlude.
In addition, also have a bit, in actual production, before rolling, keep the steel billet of high temperature to react with airborne oxygen, form the compounds such as iron oxide, after reaction, can generate one deck oxidation cortex at billet surface, also referred to as scale or firecoat.On general industry, first the steel billet in high temperature is carried out to de-scaling, in the operation of rolling, be pressed on the surface of final products by roll avoiding, thereby reduce the surface quality of product.But for the steel plate that just passes through hot rolling, because it is still keeping the high warm nature on surface, even steel billet has been carried out to de-scaling processing in abovementioned steps, still inevitably can with oxidizing gas in air or in cooling procedure with cooling water or cooling water steam contact process in, again there is partial oxidation in surface, again form oxidation cortex, the industrial removal problem being faced with such oxidation cortex.
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 requisite parts on cooling device " nozzle ", in this application, we have the atomizing cooling nozzle of selecting on order ground, and this nozzle has conventional understanding in this area, there is no particular meaning.Select the object of atomizing cooling nozzle to be the unstability easily producing when avoiding selecting current directly steel plate to be processed, and atomizing cooling nozzle have higher controllability.Therefore, in this application, if no special instructions, the nozzle occurring is atomizing cooling nozzle.
In addition, for the ease of controlling speed and the stability of cooling procedure, the basic setup mode of cooling device is for comprising upper and lower both sides cooling device.Be upside cooling device, for carrying out cooling in cooling segment to the upper surface of hot rolled steel plate; Downside cooling device, for carrying out cooling in cooling segment to the lower surface of hot rolled steel plate.On upper and lower side cooling device, be evenly provided with several atomizing cooling nozzles, spacing distance between quantity, the nozzle of nozzle is also without clear limit, keep the spacing between nozzle identical, such as quantity can be controlled within the scope of 10-100, the industrial equipment of directly selecting in existing enterprise, in addition, also need to guarantee that the atomizing cooling nozzle on the cooling device of upper and lower both sides is corresponding one by one in vertical direction.
In general, hot rolled steel plate is in the time just entering cooling section, if while only using atomizing cooling nozzle to lower the temperature to steel plate, still can not avoid head and afterbody to be equivalent to the problem that has three whiles to contact with cooling water, cause the cooling velocity of head and afterbody higher than the cooling velocity of interlude, in the time that cooling rate cannot be consistent, can produce the otherness in steel plate tissue, performance.
Therefore, one of object of the application is to realize the uniformity of steel plate two ends and interlude rate of temperature fall.
In other words,, exactly in the time that steel plate carries out cooling section, by controlling hot rolled steel plate head, afterbody and the interlude cooling water inflow when cooling, reduce the temperature difference of hot rolled steel plate head, afterbody and interlude, the uniformity of raising monoblock hot rolled steel plate rate of temperature fall.
The means of specifically taking comprise: on the control appliance of cooling device, use opening and closure of control appliance Control Nozzle, same, control appliance also can be controlled the ejection pressure of each group atomizing cooling nozzle.
For explaining conveniently, we can be defined as first group of atomizing cooling nozzle, second group of atomizing cooling nozzle from left to right successively by upper and lower both sides cooling device corresponding nozzle on upright position ... n organizes atomizing cooling nozzle.
On cooling device, measurement of inductance equipment is installed, it is arranged on the initial segment position of upside cooling device, whether on upright position, exceed first group of atomizing cooling nozzle for induction heat rolled steel plate head, also can whether on upright position, exceed first group of atomizing cooling nozzle for the afterbody of induction heat rolled steel plate.
When work, hot rolled steel plate moves forward under the drive of lathe in the direction of basic horizontal, the measurement of inductance equipment that is arranged on upside cooling device the initial segment position is started working, whether the head of induction heat rolled steel plate exceedes first group of atomizing cooling nozzle on upright position, in the time that measurement of inductance equipment senses that the head of hot rolled steel plate has exceeded, pass the signal along to control appliance, control appliance will be opened first group of atomizing cooling nozzle, and first group of nozzle starts to spray cooling water smoke to hot rolled steel plate.
For the opening time of second group of atomizing cooling nozzle, because the horizontal pace of hot rolled steel plate is predefined, therefore, do not need the measurement of inductance equipment that provides again extra, only need according to the pace of the interval between nozzle, hot rolled steel plate, just can calculate the time that hot rolled steel plate head exceedes second group of atomizing cooling nozzle on upright position, control appliance can be in the time that the head of hot rolled steel plate exceedes second group of atomizing cooling nozzle, open second group of nozzle, second group of nozzle starts to spray cooling water smoke to hot rolled steel plate.
By that analogy, for the 3rd group, the 4th group ... until opening time of last group atomizing cooling nozzle all can draw, control appliance also can be opened rear several groups of nozzles successively at corresponding time point.
That is to say to only have in the time that the upright position of steel plate head exceedes a certain group of nozzle, the switch of the nozzle being exceeded just can be opened.And ejecting cooling water smoke, end face for fear of from nozzle to steel plate affects the cooling velocity of steel plate head, nozzle should not spray with direction vertically downward, but should be with the angle of inclination to the later interlude area spray atomized water of steel plate head, the angle tilting can be adjusted according to actual conditions, it is good generally making the angle of spray angle and steel plate direction of advance remain on 30-75 degree, with 30-45 degree for better.
In general the angle of inclination of all nozzles is set to identical, but sometimes in order to reach better effect, for example, in below mentioned de-scaling effect, should make the angle of spray angle and steel plate direction of advance larger better for the high nozzle of hydraulic pressure, for the content of this respect, we will be explained in more detail hereinafter.But for the equipment of angle, it should be noted that on the end face that will avoid cooling water to be sprayed onto steel plate.
And for lasting advancing hot rolled steel plate, nozzle can keep stable state, do not need further adjusting.And in the time approaching the afterbody of steel plate, whether the upright position that measurement of inductance equipment can continue to respond to steel plate afterbody exceedes first group of nozzle, in the time sensing first group of nozzle that the upright position of afterbody of steel plate exceedes, the signal sensing is delivered to control appliance by measurement of inductance equipment, control appliance will cut out first group of atomizing cooling nozzle, and first group of nozzle stops spraying cooling water smoke 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 is predefined, therefore, do not need extra measurement of inductance equipment yet, only need according to the pace of the interval between nozzle, hot rolled steel plate, just can calculate the time that hot rolled steel plate afterbody exceedes second group of atomizing cooling nozzle on upright position, control appliance can be in the time that the afterbody of hot rolled steel plate exceedes second group of atomizing cooling nozzle, close second group of nozzle, second group of nozzle stops spraying cooling water smoke to hot rolled steel plate.
By that analogy, for the 3rd group, the 4th group ... until the shut-in time of n group atomizing cooling nozzle all can draw, control appliance also can cut out rear several groups of nozzles successively at corresponding time point, until n group (being last group) atomizing cooling nozzle is closed, said method is being at least successful aspect minimizing energy consumption.
For measurement of inductance equipment, whether exceed first group of atomizing cooling nozzle for responding to the upright position of steel plate head, also whether exceed first group of atomizing cooling nozzle for the upright position of the afterbody of responding to steel plate.And by the control appliance of the signal announcement obtaining.Generally can select laser induced measurement device or other all can.
For control appliance, generally select PLC equipment, i.e. programmable logic controller (PLC) (programmablc logic controller), its inner program storage, for actuating logic computing, the operations such as sequential control.
Self-evident for the advantage that adopts such scheme, the for example minimizing to energy consumption, although the consumption impact for Water Energy is little, this is to be all recirculated water due to what generally adopt on industrial equipment, but the energy resource consumption bringing for high-tension apparatus is that significantly therefore the cost of low-pressure water is lower.Moreover, for final products---near steel plate head and afterbody, tissue is controlled, is very accurate, can obtain 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, for example atomizing cooling nozzle, measurement of inductance equipment, control appliance are also facile from the market.
For the application's further improvement, content below describes in detail.
At least guaranteeing on the basis that hot rolled steel plate cooldown rate is consistent, if can further also make the application's progressive clearer and more definite to the removal of surface of steel plate oxidation cortex.
The method for controlling surface chromatic aberration of a kind of hot rolling acid-cleaning plate steel is disclosed in prior art, the method is in rough rolling process, by the entrance at roughing mill and outlet, descaling spray nozzle is set respectively, thereby in the operation of rolling, can adopt every time to carry out high-pressure water descaling at roughing mill entrance side, and further by carry out high-pressure water descaling between mm finishing mill unit frame, thereby can eliminate the scenery with hills and waters line aberration of hot rolling acid-cleaning plate belt steel surface, improve the surface quality of product.But the problem of said method is or cannot avoids having adopted residual oxidation cortex, thereby make remaining firecoat be retained in the surface of final products, thereby cannot meet the production of great surface quality product.
Another prior art discloses the method that uses low hydraulic pressure to carry out de-scaling, but shows that by experiment the method still exists firecoat to go aliquant problem in actual production.
The application's technical scheme has met cooling to steel plate, can meet again the removal of the scale that surface of steel plate is produced.
We consider due to steel plate processing through a de-scaling before being rolled, therefore, the oxide skin producing in the operation of rolling, thickness is little, general thickness at 50 μ m between 100 μ m, the scale producing for this class, while using high hydraulic pressure to process, the extra financial burden that its high hydraulic equipment using produces is heavy.
In this application, we consider the low cost of utilizing low hydraulic pressure, also considers the validity that high hydraulic pressure is removed remaining firecoat.Adopt the hydraulic pressure of two or more different pressures to realize de-scaling.
Concrete operation method: first the steel plate after to rolling sprays with low hydraulic pressure, utilize cooling water to steel plate with oxidation cortex to different the produced deformation of hot conductivity, make to be oxidized cortex and peel off with steel plate generation.
For only using low hydraulic pressure deficiency so that oxide skin layer come off from steel plate this part, our design is the mode that strengthens gradually hydraulic pressure in cooling middle employing.So that the oxidation cortex sticking on steel plate with different adhesive force reaches the object coming off completely.
It is that cooling section is divided into three parts that the application illustrates adopted mode, thin speech, be exactly cooling section first three/mono-distance in, atomizing cooling nozzle adopts low pressure to carry out cooling to steel plate, in 1/3rd to 2/3rds distances, during atomizing cooling nozzle adopts, pressure is further cooling to steel plate, and 2/3rds to the distance of ending place, and atomizing cooling nozzle adopts high pressure steel plate to be carried out finally cooling.Wherein the hydraulic pressure control of the atomizing cooling nozzle of Part I is under 30 Palestine and Israels, but can not be 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 be 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 be higher than 200 bar, otherwise the high cost producing, and can produce further deformation to thinner steel plate, thus product final mass affected.
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 parts artificially, its basic theory and design theory is identical, the pressure that after will guaranteeing exactly, a segment all sprays than last segment nozzle is slightly high, but, the pressure exceeding is to present certain regularity, and must design in certain effective range, industrial design, in II segment to the N-1 segment, the pressure proportional of the atomizing cooling nozzle that the pressure of the atomizing cooling nozzle that each segment is used and the last segment of this segment are used is controlled within the scope of 1.1-1.5:1, preferred proportion is 1.25.But should guarantee to be not less than 100 bar for the pressure of atomizing cooling nozzle in N segment, simultaneously can not be higher than 200 bar, and to guarantee that the size of its pressure need be higher than the pressure of the atomizing cooling nozzle of segment second from the bottom.
Meanwhile, also find in practice, when the steel plate of different-thickness is processed, the pressure of atomizer is not the smaller the better, also non-being the bigger the better, but relevant to the thickness of steel plate, analyzing the steel plate that its reason is different-thickness is different at the radiating rate of cooling procedure.Between the pressure of the atomizer that does not have technology to show thickness in prior art and to use, should keep certain relation.The application's research shows, in the time that the thick steel plate of 20-50mm is processed, the ratio of the first segment atomizing cooling nozzle pressure and steel plate thickness is to be advisable between 0.5-0.8, be less than 15mm for thickness, but when the steel plate that is not less than 5mm is processed, the ratio of the first segment atomizing cooling nozzle pressure and steel plate thickness is below 0.4, but will guarantee that the minimum pressure of atomizing cooling nozzle can not be lower than 5 bar.
And for the angle between atomizing cooling nozzle and steel plate, for the initial segment, the size of angle can be selected smaller, and for terminal section, the size of angle can be selected more better, and the span of angle should be good at 30-75 degree.Preferred version is: for cooling section being divided 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 the scheme that cooling section is divided into N 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 in order to increase gradually the hydraulic pressure between nozzle exit pressure and steel plate, to remove better the oxidation cortex that surface of steel plate produces, the angle increasing is advisable with 3-10 degree, be preferably 3-5 degree, but should guarantee that the angle of all segments should guarantee between 30-75 degree.
For the improvement project of the application's Part II, the economy of its generation is also considerable.Reduce high pressure nozzle equipment over half.For the technique that only uses high pressure nozzle, cost, the clearance of the firecoat that enterprise more pays close attention to improves.For the technique that only uses low-pressure nozzle, the clearance of the scale that enterprise more pays close attention to relatively also improves.Controlling is also eaily, only pre-set program need be write.
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 afterbody, 2---upside cooling device, 3---downside cooling device, 4-1---first group of atomizing cooling nozzle, 4-n---n organizes atomizing cooling nozzle, and 5---measurement of inductance equipment, 6---control appliance.
The specific embodiment
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, on upside cooling device 2 and downside cooling device 3, be evenly provided with several atomizing cooling nozzles, 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 upside cooling device 2, whether exceed first group of atomizing cooling nozzle 4-1 of upside cooling device and downside cooling device for responding to the head 1-1 of steel plate 1, and whether exceeded the n group atomizing cooling nozzle 4-n of upside cooling device and downside cooling device for responding to the head 1-1 of steel plate 1.
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 is also controlled all atomizing cooling nozzles on upside cooling device 2 and downside cooling device 3, control opening and closing of atomizing cooling nozzle, also controlled the size of all hydraulic pressure that atomizing cooling nozzle sprays.
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, on upside cooling device 2 and downside cooling device 3, be evenly provided with several atomizing cooling nozzles, 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 upside cooling device 2, whether exceed first group of atomizing cooling nozzle 4-1 of upside cooling device and downside cooling device for responding to the head 1-1 of steel plate 1, and whether exceeded the n group atomizing cooling nozzle 4-n of upside cooling device and downside cooling device for responding to the head 1-1 of steel plate 1.
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 is also controlled all atomizing cooling nozzles on upside cooling device 2 and downside cooling device 3, control opening and closing of atomizing cooling nozzle, also controlled the size of all hydraulic pressure that atomizing cooling nozzle sprays.
In the cooling zone being formed by upside cooling device and downside cooling device, its first three/distance interior (i.e. I region), low pressure atomizing cooling jet is set, / 3rd to 2/3rds distances interior (i.e. II region), middle pressure atomizing cooling nozzle is set, 2/3rds to the distance of ending place (i.e. III region), and 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, preferably 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, preferably 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, preferably 120-160 bar, more preferably 120-130 bar.
Embodiment 3: cooling device of steel plate, for steel plate 1 is carried out to cooling processing.Comprise upside cooling device 2 and downside cooling device 3, on upside cooling device 2 and downside cooling device 3, be evenly provided with several atomizing cooling nozzles, 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 upside cooling device 2, whether exceedes first group of atomizing cooling nozzle of upside cooling device and downside cooling device for responding to the head 1-1 of steel plate 2.
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 is also controlled all atomizing cooling nozzles on upside cooling device 2 and downside cooling device 3, control opening and closing of atomizing cooling nozzle, also controlled the size of all hydraulic pressure that atomizing cooling nozzle sprays.
Between the cooling zone being 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 1/5th to 2/5ths distances, mesolow atomizing cooling nozzle is set, in 2/5ths to 3/5ths distances, low pressure atomizing cooling jet is set, in 3/5ths to 4/5ths distances, mesohigh atomizing cooling nozzle is set, and 4/5ths to the distance of ending place, and 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, preferably 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, preferably 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, preferably 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, preferably 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, preferably 120-160 bar, more preferably 120-130 bar.
While 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, in the time not exceeding, all atomizing cooling nozzles are all processed closed condition, and in the time that steel plate head 1-1 exceedes first group of atomizing cooling nozzle 4-1, control appliance 6 is opened first group of atomizing cooling nozzle 4-1, this group atomizing cooling nozzle 4-1 sprays cooling water smoke to steel plate 1, starts steel plate to lower the temperature.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, advancing the time of steel plate, just can calculate steel plate head exceedes second group of atomizing cooling nozzle time in upright position, and control appliance 6 can be in the time that the head 1-1 of hot rolled steel plate exceedes second group of atomizing cooling nozzle, open second group of nozzle, second group of atomizing cooling nozzle starts to eject cooling water smoke to steel plate.The like, until last group (n group) atomizing cooling nozzle.
And in the time approaching the afterbody of steel plate, whether the upright position that measurement of inductance equipment 5 can continue induction steel plate afterbody 1-2 exceedes first group of nozzle 4-1, in the time sensing first group of nozzle 4-1 that the upright position of steel plate afterbody 1-2 exceedes, the signal sensing is delivered to control appliance 6 by measurement of inductance equipment 5, control appliance 6 will cut out first group of atomizing cooling nozzle 4-1, and first group of atomizing cooling nozzle 4-1 stops spraying cooling water smoke 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 is predefined, therefore, do not need extra measurement of inductance equipment yet, only need according to the pace of the interval between nozzle, hot rolled steel plate, just can calculate the time that hot rolled steel plate afterbody exceedes second group of atomizing cooling nozzle on upright position, control appliance can be in the time that the afterbody of hot rolled steel plate exceedes second group of atomizing cooling nozzle, close second group of nozzle, second group of nozzle stops spraying cooling water smoke to hot rolled steel plate.
By that analogy, for the 3rd group, the 4th group ... all can draw until n organizes the shut-in time of atomizing cooling nozzle, control appliance also can cut out rear several groups of nozzles successively at corresponding time point, until last group atomizing cooling nozzle is closed.
Claims (3)
1. a cooling device of steel plate, comprises upside cooling device, downside cooling device, measurement of inductance equipment and control appliance; On upside cooling device and downside cooling device, be evenly provided with several atomizing cooling nozzles, the atomizing cooling nozzle of installing on upside cooling device and downside cooling device 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 is installed on upside cooling device; Control appliance and measurement of inductance equipment connection.
2. device according to claim 1, is characterized in that, the angular range of the direction of advance of atomizing cooling nozzle and steel plate is 30-45 degree.
3. device according to claim 1 and 2, in the cooling zone forming at upside cooling device and downside cooling device, its first three/distance in, low pressure atomizing cooling jet is set, / 3rd distances are to 2/3rds distances, middle pressure atomizing cooling nozzle is set, and 2/3rds distances, to ending place, arrange high-pressure atomization cooling jet.
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| CN201320696687.8U CN203635639U (en) | 2013-11-07 | 2013-11-07 | Steel plate cooling device |
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| CN201320696687.8U CN203635639U (en) | 2013-11-07 | 2013-11-07 | Steel plate cooling device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114226470A (en) * | 2021-12-10 | 2022-03-25 | 山西太钢不锈钢股份有限公司 | Thermal simulation cooling control system and use method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114226470A (en) * | 2021-12-10 | 2022-03-25 | 山西太钢不锈钢股份有限公司 | Thermal simulation cooling control system and use method |
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