CN104785550B - Cooling device of steel plate - Google Patents
Cooling device of steel plate Download PDFInfo
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- CN104785550B CN104785550B CN201510178848.8A CN201510178848A CN104785550B CN 104785550 B CN104785550 B CN 104785550B CN 201510178848 A CN201510178848 A CN 201510178848A CN 104785550 B CN104785550 B CN 104785550B
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Abstract
A kind of cooling device of steel plate, including：Upside cools down equipment, downside cools down equipment, upside cools down and is evenly arranged with several atomizing cooling nozzles in equipment and downside cooling equipment, the atomizing cooling nozzle installed 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；Further include inductively measuring equipment and control device.It using the device, can economically reduce the heavy burdens, final products can also be made organizationally to keep high consistency.
Description
It is on November 07th, 2013 that the application, which is the applying date, application No. is 201310545017.0, entitled " steel plate
The divisional application of the patent application of cooling device ".
Technical field
This application involves a kind of surface of steel plate process field, especially a kind of hot rolled steel plate cooling device and cooling means.
Background technology
The manufacturing process of steel plate is usually to be completed by heating, roughing, finish rolling, cooling, five step processes of winding.Its light plate
Cooling is wherein important step, and equipment used in cooling procedure is also one of core equipment of production process, cooling
Effect is that the steel plate after mill milling is cooled to predetermined temperature, and cooling effect can determine the final performance of steel plate.
In cooling procedure, we always want to monoblock steel plate all sites cooling rate it is identical, this allows for drop
The uniformity of warm speed determines the uniformity of its performance, to form identical institutional framework.Currently, steel plate width direction is cold
But uniformity has made abundant consideration, but for the rate of temperature fall and steel of steel plate both ends (i.e. steel plate head and endpiece)
The nonsynchronous problem of rate of temperature fall of plate interlude does not solve very well always.Its Producing reason is both ways：When due to
During the rolling process, head-tail mill speed is usually less than steel plate interlude to steel plate, causes head-tail temperature less than in the middle part of steel plate；
Second is that in Cooling Process for Steel Plate Based, head-tail is equivalent to three faces while being contacted with cooling water, makes both ends faster than interlude cooling.It is existing
There is technology since above-mentioned technical problem can not be overcome, cannot also ensure the uniform cooling of steel plate on the whole, due to two parts temperature
Difference band carrys out the difference of plate property, and the tissue of steel plate, performance can be caused also to show larger otherness.
One of this technological means is solved the problems, such as at present by the material of final products direct topping and tail portion, but the hand
Waste of material is self-evident caused by section, and the dimensions length of excision also not certain regularity can be sayed.
Also there is technology to show, the temperature difference of section and interlude end to end is solved by automation control means, that is, reduces section end to end
The usage amount of cooling water makes steel plate head endpiece temperature be consistent with interlude with expection.But practice have shown that the technique there are still
The even problem of inhomogeneous cooling, such as head and tail portion endpoint nearby still inevitably show the martensitic structure of fine acicular,
No matter how the hydraulic pressure at both ends is controlled, be still difficult to overcome the problems, such as this, to which the tissue at both ends cannot be made to keep phase with interlude
Together.
In addition, also having a bit, in actual production, keep the steel billet of high temperature that can occur with the oxygen in air before rolling anti-
It answers, forms the compounds such as iron oxide, one layer of oxide scale layer, also referred to as scale or firecoat can be generated in billet surface after reaction.One
As it is industrial de-scaling is carried out to the steel billet in high temperature first, to avoid final products are pressed by roll during the rolling process
On surface, to reduce the surface quality of product.But for the steel plate just past hot rolling, due to its still remain table and height
Warm nature, even if having carried out de-scaling processing to steel billet in abovementioned steps, still inevitably with oxidisability in air
Gas or in cooling procedure with cooling water or cooling water vapour contact process, partial oxidation occurs again for surface, again shape
At oxide scale layer, it is industrially faced with the removal problem to such oxide scale layer.
Invention content
Equipment used in this application can be improved in existing common various steel plates cooling equipment.On overcoming
State mentioned various technical problems.
First, as one of essential component " nozzle " on cooling device, in this application, we manage it the choosing on mesh ground
With atomizing cooling nozzle, which has conventional understanding in this field, has no particular meaning.Select the mesh of atomizing cooling nozzle
Be the unstability that is also easy to produce when to avoid that flow is selected directly handle steel plate, and atomizing cooling nozzle is with higher
Controllability.Therefore, in this application, unless otherwise specified, the nozzle occurred is atomizing cooling nozzle.
In addition, for the ease of controlling the rate and stability of cooling procedure, the basic setup mode of cooling device is to include
Upper and lower both sides cool down equipment.That is the cooling equipment in upside, for being cooled down to the upper surface of hot rolled steel plate in cooling segment；
Downside cools down equipment, for being cooled down to the lower surface of hot rolled steel plate in cooling segment.In upper and lower side cooling equipment
Even to be provided with several atomizing cooling nozzles, spacing distance between the quantity of nozzle, nozzle is simultaneously without clear limit, keeps spray
Spacing between mouth is identical, for example controllable quantity system is within the scope of 10-100, industrial directly to select setting in existing enterprise
It is standby, in addition, it is also necessary to ensure that the atomizing cooling nozzle in upper and lower both sides cooling equipment corresponds in vertical direction.
In general, hot rolled steel plate is when having just enter into cooling section, if dropped to steel plate using only atomizing cooling nozzle
Wen Shi is not still avoided that the problem of head and tail portion have been equivalent to three faces while having been contacted with cooling water, causes head and tail portion
Cooling velocity be higher than interlude cooling velocity, when cooling rate cannot keep it is consistent when, that is, will produce steel plate tissue, performance
On otherness.
Therefore, the first purpose of the application is to realize the consistency at steel plate both ends and interlude rate of temperature fall.
In other words, it is exactly when steel plate carries out cooling section, when being cooled down by controlling hot rolled steel plate head, tail portion and interlude
Cooling water inflow, reduce the temperature difference of hot rolled steel plate head, tail portion and interlude, improve the consistent of monoblock hot rolled steel plate rate of temperature fall
Property.
The means specifically taken include：On the control device of cooling device, the opening of nozzle is controlled using control device
With closure, equally, control device can also control the ejection pressure of each group of atomizing cooling nozzle.
Convenient for statement, upper and lower both sides can be cooled down equipment by we, and corresponding nozzle is from left to right on upright position
It is defined as first group of atomizing cooling nozzle, second group of atomizing cooling nozzle ... n-th group atomizing cooling nozzle successively.
On cooling device, measurement of inductance equipment is installed, is mounted on the starting fragment position of upside cooling equipment, is used for
Incude hot rolled steel plate head whether on upright position more than first group atomizing cooling nozzle, can be used for incuding hot rolled steel plate
Tail portion whether on upright position more than first group atomizing cooling nozzle.
When work, hot rolled steel plate moves forward in substantially horizontal directions under the drive of lathe, and it is cold to be mounted on upside
But the measurement of inductance equipment of equipment starting fragment position is started to work, incude hot rolled steel plate head whether on upright position be more than
First group of atomizing cooling nozzle is passed the signal along to when measurement of inductance equipment senses that the head of hot rolled steel plate alreadys exceed
Control device, control device will open first group of atomizing cooling nozzle, and first group of nozzle starts to spray cooling to hot rolled steel plate
Water mist.
For the opening time of second group of atomizing cooling nozzle, since the speed that horizontally advances of hot rolled steel plate is to preset
, it therefore, does not need to provide additional measurement of inductance equipment again, it is only necessary to according to the interval between nozzle, hot rolled steel plate
Forward speed, so that it may hot rolled steel plate head is calculated on upright position more than the time of second group of atomizing cooling nozzle,
Control device can open second group of nozzle, second group of spray when the head of hot rolled steel plate is more than second group of atomizing cooling nozzle
Mouth starts to spray cooling water mist to hot rolled steel plate.
And so on, for third group, the 4th group ... until last group of atomizing cooling nozzle opening time
To obtain, control device successively can also open rear several groups of nozzles at corresponding time point.
That is, only when the upright position of steel plate head is more than a certain group of nozzle, the nozzle that is exceeded is opened
Guan Caihui is opened.And the cooling velocity of steel plate head is influenced in order to avoid nozzle ejects cooling water mist to the end face of steel plate, spray
Mouth should not be sprayed with direction vertically downward, but should be sprayed at an oblique angle to the later interlude region of steel plate head
Atomized water is penetrated, inclined angle can be adjusted according to actual conditions, generally make the angle of spray angle and steel plate direction of advance
It is maintained at 30-75 degree to be preferred, is more preferably with 30-45 degree.
In general the angle of inclination of all nozzles is set as identical, but sometimes for reaching better effect, example
Such as de-scaling effect mentioned below, spray angle and the angle of steel plate direction of advance should be made big by one the high nozzle of hydraulic pressure
A bit preferably, for the content of this respect, we will be explained in further detail below.But for the equipment of angle, it should be noted that
Cooling water is avoided to be sprayed onto on the end face of steel plate.
And for the hot rolled steel plate in being continuously advanced, nozzle can keep stable state, need not further adjust.And
When close to the tail portion of steel plate, inductively measure equipment can continue induction steel plate tail upright position whether the spray more than first group
Mouth inductively measures the signal that equipment will sense when sensing first group of nozzle that the upright position of the tail portion of steel plate is more than
It is transmitted to control device, control device will close first group of atomizing cooling nozzle, and first group of nozzle stops spraying to hot rolled steel plate
Cooling water mist.
For the shut-in time of second group of atomizing cooling nozzle, similarly it is found that horizontally advancing speed due to hot rolled steel plate
It is preset, therefore, does not also need additional measurement of inductance equipment, it is only necessary to according to the interval between nozzle, hot-rolled steel
The forward speed of plate, so that it may be calculated hot rolled steel plate tail portion on upright position more than second group of atomizing cooling nozzle when
Between, control device can be when the tail portion of hot rolled steel plate be more than second group of atomizing cooling nozzle, second group of nozzle of closing, second group
Nozzle stops spraying cooling water mist to hot rolled steel plate.
And so on, third group, the 4th group ... can be obtained up to the shut-in time of n-th group atomizing cooling nozzle
Go out, control device successively can also close rear several groups of nozzles at corresponding time point, until by n-th group (i.e. last group) mist
Change cooling nozzles to close, the above method is successful at least in terms of reducing energy consumption.
For inductively measuring equipment, the upright position for incuding steel plate head whether spray by the cooling of the atomization more than first group
Mouth, be also used for induction steel plate tail portion upright position whether more than first group atomizing cooling nozzle.And obtained signal is accused
Control device.Generally can be selected laser induced measuring apparatus or other.
For control device, PLC device is generally selected, you can programmed logic controller (programmable logic
Controller), internal program storage, for executing logical operation, the operations such as sequential control.
For using the above scheme the advantages of be self-evident, such as the reduction to energy consumption, although for Water Energy
Consumption influences less, this is because what is generally used on industrial equipment is all recirculated water, but for energy caused by high-tension apparatus
Source consumption is it will be evident that therefore the cost of low pressure water is relatively low.Moreover for final products --- steel plate head and tail portion
The controlling of tissue around is extremely accurate, tissue identical with interlude can be obtained.And to the improvement of existing equipment
To be relatively easy to, need not input cost too much, selected component, for example, atomizing cooling nozzle, inductively measure equipment,
Control device is also facile from the market.
For being further improved for the application, it is described in detail in following content.
At least ensure that hot rolled steel plate cooling rate is consistent on the basis of, if it is possible to further to steel plate table
The removal of surface oxidized skin layer but also the progressive of the application definitely.
A kind of method for controlling surface chromatic aberration of hot rolling acid-cleaning plate steel is had been disclosed in the prior art, and this method is in roughing
In the process, descaling spray nozzle is respectively set with outlet by the entrance in roughing mill, to during the rolling process, adopt
High-pressure water descaling is carried out in roughing mill entrance side with every time, and is further removed by carrying out high pressure water between mm finishing mill unit rack
Squama improves the surface quality of product so as to eliminate the scenery with hills and waters line aberration of hot rolling acid-cleaning plate belt steel surface.However, above-mentioned side
The problem of method, is or can not avoid using remaining oxide scale layer, to make remaining firecoat be retained in final products
Table and, thus cannot be satisfied the production of great surface quality product.
Another prior art discloses the methods for using low hydraulic pressure to carry out de-scaling, however are shown experimentally that this method in reality
Indivisible problem is gone there are still firecoat in the production of border.
The technical solution of the application is the cooling met to steel plate, and disclosure satisfy that the scale generated to surface of steel plate
Removal.
It is contemplated that the processing for having already passed through a de-scaling before being rolled due to steel plate, in the operation of rolling
In generated oxide skin, thickness is little, and general thickness, for the scale of this kind of generation, uses height between 50 μm to 100 μm
Hydraulic pressure when being handled, used in the additional financial burden that generates of high hydraulic equipment be heavy.
In this application, we are i.e. in view of the low cost using low hydraulic pressure, it is also considered that high hydraulic pressure to remaining firecoat
The validity of removal.The hydraulic pressure of two or more different pressures is used to realize de-scaling.
Concrete operation method：The steel plate after rolling is sprayed with low hydraulic pressure first, using cooling water to steel plate and oxygen
Change deformation caused by conductivity difference of the cortex to heat, oxide scale layer is made to generate stripping with steel plate.
Be insufficient to allow this part that oxide scale layer falls off from steel plate for low hydraulic pressure is only used only, our design be
In cooling by the way of being gradually increased hydraulic pressure.So as to reach completely de- with the oxide scale layer of different adhesive force adherency on the steel plate
The purpose fallen.
Mode is that cooling section is divided into three parts used by the application illustrates, and carefully says it, is exactly in cooling section
Preceding one third distance in, atomizing cooling nozzle cools down steel plate using low pressure, one third to 2/3rds distances
Interior, atomizing cooling nozzle is pressed in using and is further cooled down to steel plate, in the distance at 2/3rds to ending, atomizing cooling nozzle
Steel plate is finally cooled down using high pressure.Wherein the hydraulic pressure control of the atomizing cooling nozzle of first part at 30 bars hereinafter, but
It cannot be below 5 bars.Wherein the hydraulic pressure control of the atomizing cooling nozzle of second part at 50 bars hereinafter, but cannot be below 30 bars.Its
The hydraulic pressure control of the atomizing cooling nozzle of middle Part III can not be higher than 200 bars not less than 100 bars, otherwise produced by
Cost it is excessively high, and further deformation will produce to relatively thin steel plate, to influence product final mass.
Equally, cooling section can be also divided into four segments, five segments or more segments.However no matter
Entire cooling equipment is artificially divided into several parts, basic principle and design concept are identical, seek to ensure
Latter segment is more slightly higher than the pressure that previous segment nozzle is sprayed, however, the pressure being higher by is that certain rule are presented
Rule property, and must design in certain effective range, industrial design scheme, from Section II segment to N-1 segments
It is interior, the pressure of atomizing cooling nozzle used in each segment and the cooling spray of atomization used in the previous segment of the segment
The pressure proportional of mouth is controlled in 1.1-1.5：In 1 range, it is preferably in a proportion of 1.25.But for being atomized cooling spray in N segments
The pressure of mouth should ensure that not less than 100 bars, while can not be higher than 200 bars, and ensure that the size of its pressure need to be higher than to fall
The pressure of the atomizing cooling nozzle of number second interval section.
Meanwhile in practice it has also been found that, when handling the steel plate of different-thickness, the pressure of atomizer is opened non-smaller
It is better, nor be the bigger the better, but related to the thickness of steel plate, analyze itself reason for this is that the steel plate of different-thickness in cooling procedure
Radiating rate be different.There is not technology to show between thickness and the pressure of used atomizer in the prior art to answer
Keep certain relationship.For the application studies have shown that when the steel plate to 20-50mm thickness is handled, the atomization of first interval section is cold
But the ratio of nozzle exit pressure and steel plate thickness is advisable between 0.5-0.8, is less than 15mm, but the steel not less than 5mm for thickness
When plate is handled, the ratio of first interval section atomizing cooling nozzle pressure and steel plate thickness is 0.4 hereinafter, but to ensure to be atomized
The minimum pressure of cooling nozzles cannot be below 5 bars.
And for the angle between atomizing cooling nozzle and steel plate, for the initial segment, the size of angle can select
Smaller, and for terminal section, the size of angle can select bigger better, and the value range of angle should
It is preferred in 30-75 degree.Preferred embodiment is：For cooling section to be divided into the scheme of three segments, I segment is come
It says, the angle of atomizing cooling nozzle is selected as 30-45 degree, and for Section II segment, atomizing cooling nozzle angle is selected as
45-55 degree, for Section III segment, atomizing cooling nozzle angle is selected as 60-75 degree.For cooling section is divided into N
For the scheme of a segment, it is preferable that atomizing cooling nozzle angle is than in (N-2) segment in (N-1) segment
The angle of atomizing cooling nozzle successively increases, such purpose be in order to gradually increase the hydraulic pressure between nozzle exit pressure and steel plate,
Preferably to remove oxide scale layer caused by surface of steel plate, increased angle is advisable with 3-10 degree, preferably 3-5 degree, but
It should be ensured that the angle of all segments should be ensured that between 30-75 degree.
For the improvement project of the application second part, the economy generated is also considerable.Reduce more than half
High pressure nozzle equipment.For the technique using only high pressure nozzle, cost reduction, the removal rate for the firecoat that enterprise more pays close attention to
It improves.For the technique using only low-pressure nozzle, the removal rate for the scale that enterprise more pays close attention to also improves relatively.It controls
Come be also eaily, only pre-set program need to be written.
Description of the drawings
Fig. 1 is the first structure schematic diagram of cooling device of steel plate.
Fig. 2 is the second structural schematic diagram of cooling device of steel plate.
In figure：1 --- steel plate, 1-1 --- steel plate head, 1-2 --- steel plate tail, 2 --- upside cools down equipment,
3 --- downside cooling equipment, 4-1 --- first group of atomizing cooling nozzle, 4-n --- n-th group atomizing cooling nozzle, 5 --- sense
Answer measuring apparatus, 6 --- control device.
Specific implementation mode
Embodiment 1：As shown in Figure 1, cooling device of steel plate, for carrying out cooling treatment to steel plate 1.It is set including upside cooling
Equipment 3 is cooled down for 2 and downside, several atomization cooling sprays are evenly arranged in upside cooling equipment 2 and downside cooling equipment 3
The angular range of mouth, atomizing cooling nozzle and 1 direction of advance of steel plate is 30-75 degree (not shown)s.
Cooling device of steel plate further includes inductively measuring equipment 5, inductively measures equipment 5 and is installed in upside cooling equipment 2, uses
Whether equipment is cooled down in the head 1-1 of induction steel plate 1 more than upside and downside cools down first group of atomizing cooling nozzle 4- of equipment
1, and for incude the head 1-1 of steel plate 1 whether be more than the cooling equipment in upside and downside cool down equipment n-th group atomization it is cold
But nozzle 4-n.
Cooling device of steel plate further includes control device 6, and control device 6 is connect with equipment 5 is inductively measured, for receiving induction
Signal in measuring apparatus 5, meanwhile, control device 6 also cools down upside atomization all in equipment 2 and downside cooling equipment 3
Cooling nozzles are controlled, that is, are controlled opening and the closing of atomizing cooling nozzle, also controlled all atomizing cooling nozzle institutes
Spray the size of hydraulic pressure.
Embodiment 2：As shown in Fig. 2, cooling device of steel plate, for carrying out cooling treatment to steel plate 1.It is set including upside cooling
Equipment 3 is cooled down for 2 and downside, several atomization cooling sprays are evenly arranged in upside cooling equipment 2 and downside cooling equipment 3
The angular range of mouth, atomizing cooling nozzle and 1 direction of advance of steel plate is 30-75 degree (not shown)s.
Cooling device of steel plate further includes inductively measuring equipment 5, inductively measures equipment 5 and is installed in upside cooling equipment 2, uses
Whether equipment is cooled down in the head 1-1 of induction steel plate 1 more than upside and downside cools down first group of atomizing cooling nozzle 4- of equipment
1, and for incude the head 1-1 of steel plate 1 whether be more than the cooling equipment in upside and downside cool down equipment n-th group atomization it is cold
But nozzle 4-n.
Cooling device of steel plate further includes control device 6, and control device 6 is connect with equipment 5 is inductively measured, for receiving induction
Signal in measuring apparatus 5, meanwhile, control device 6 also cools down upside atomization all in equipment 2 and downside cooling equipment 3
Cooling nozzles are controlled, that is, are controlled opening and the closing of atomizing cooling nozzle, also controlled all atomizing cooling nozzle institutes
Spray the size of hydraulic pressure.
It is formed by cooling section by upside cooling equipment and downside cooling equipment, in preceding one third distance
Low pressure atomizing cooling nozzles are arranged in (i.e. I region), and one third to 2/3rds is in (i.e. Section II region), in setting
Atomizing cooling nozzle is pressed, in the distance at 2/3rds to ending (i.e. Section III region), setting high-pressure atomization cooling nozzles.
Wherein, the hydraulic pressure of low pressure atomizing cooling nozzles is arranged within the scope of 5-30 bars, preferably 5-20 bars, more preferable 8-15
Bar；The hydraulic pressure of middle pressure atomizing cooling nozzle is arranged within the scope of 30-50 bars, preferably 30-45 bars, more preferable 35-38 bars；High pressure mist
The hydraulic pressure for changing cooling nozzles is arranged within the scope of 100-200 bars, preferably 120-160 bars, more preferable 120-130 bars.
Embodiment 3：Cooling device of steel plate, for carrying out cooling treatment to steel plate 1.Equipment 2 and downside are cooled down including upside
It is evenly arranged with several atomizing cooling nozzles, atomization cooling in cooling equipment 3, upside cooling equipment 2 and downside cooling equipment 3
The angular range of nozzle and 1 direction of advance of steel plate is 30-75 degree.
Cooling device of steel plate further includes inductively measuring equipment 5, inductively measures equipment 5 and is installed in upside cooling equipment 2, uses
Whether equipment is cooled down in the head 1-1 of induction steel plate 2 more than upside and downside cools down first group of atomizing cooling nozzle of equipment.
Cooling device of steel plate further includes control device 6, and control device 6 is connect with equipment 5 is inductively measured, for receiving induction
Signal in measuring apparatus 5, meanwhile, control device 6 also cools down upside atomization all in equipment 2 and downside cooling equipment 3
Cooling nozzles are controlled, that is, are controlled opening and the closing of atomizing cooling nozzle, also controlled all atomizing cooling nozzle institutes
Spray the size of hydraulic pressure.
Cooling section is formed by by upside cooling equipment and downside cooling equipment, five segments are averagely divided into,
In its preceding 1/5th distance, low pressure atomizing cooling nozzles are set, and 2/1sts to five/5th in, and mesolow mist is arranged
Change cooling nozzles, 3/2nds to five/5ths distance in, be arranged low pressure atomizing cooling nozzles, 4/3rds to five/5ths away from
From interior, mesohigh atomizing cooling nozzle is set, in the distance at 4/5ths to ending, high-pressure atomization cooling nozzles are set.
Wherein, the hydraulic pressure of low pressure atomizing cooling nozzles is arranged within the scope of 5-30 bars, preferably 5-20 bars, more preferable 8-15
Bar；The hydraulic pressure of mesolow atomizing cooling nozzle is arranged within the scope of 30-50 bars, preferably 30-45 bars, more preferable 35-38 bars；Middle pressure
The hydraulic pressure of atomizing cooling nozzle is arranged within the scope of 50-70 bars, preferably 55-65 bars, more preferable 60-65 bars；Mesohigh atomization is cold
But the hydraulic pressure of nozzle is arranged within the scope of 70-90 bars, preferably 75-85 bars, more preferable 80-85 bars；High-pressure atomization cooling nozzles
Hydraulic pressure is arranged within the scope of 100-200 bars, preferably 120-160 bars, more preferable 120-130 bars.
When being worked using the device described in embodiment 1-3, open and inductively measure equipment 5, induction steel plate head 1-1 whether
First group of atomizing cooling nozzle 4-1 is had been on upright position, when being not above, all atomizing cooling nozzles are located
Closed state is managed, when steel plate head 1-1 is more than first group of atomizing cooling nozzle 4-1, it is cold that control device 6 opens first group of atomization
But nozzle 4-1, this group of atomizing cooling nozzle 4-1 spray cooling water mist to steel plate 1, start to cool down to steel plate.For second group of mist
Change cooling nozzles opening time, due to hot rolled steel plate horizontally advance speed be it is pre-set, according only to nozzle
Between spacing distance, the advance time of steel plate, so that it may to calculate steel plate head in upright position be more than that second group of atomization is cold
But the time of nozzle, control device 6 can open the when the head 1-1 of hot rolled steel plate is more than second group of atomizing cooling nozzle
Two groups of nozzles, second group of atomizing cooling nozzle start to eject cooling water mist to steel plate.And so on, until last group
(n-th group) atomizing cooling nozzle.
And when close to the tail portion of steel plate, inductively measure equipment 5 can continue induction steel plate tail 1-2 upright position whether
More than first group nozzle 4-1 is inductively measured when sensing first group of nozzle 4-1 that the upright position of steel plate tail 1-2 is more than
The signal sensed is transmitted to control device 6 by equipment 5, and control device 6 will close first group of atomizing cooling nozzle 4-1, and first
Group atomizing cooling nozzle 4-1 stops spraying cooling water mist to hot rolled steel plate.
For the shut-in time of second group of atomizing cooling nozzle, since the speed that horizontally advances of hot rolled steel plate is to preset
, therefore, do not need additional measurement of inductance equipment, it is only necessary to according to the advance speed at interval, hot rolled steel plate between nozzle yet
Degree, so that it may be set more than the time of second group of atomizing cooling nozzle, control on upright position so that hot rolled steel plate tail portion is calculated
Standby to close second group of nozzle when the tail portion of hot rolled steel plate is more than second group of atomizing cooling nozzle, second group of nozzle stops
Cooling water mist is sprayed to hot rolled steel plate.
And so on, third group, the 4th group ... can be obtained up to the shut-in time of n-th group atomizing cooling nozzle
Go out, control device successively can also close rear several groups of nozzles at corresponding time point, until by last cooling spray of group atomization
Mouth is closed.
Claims (4)
1. a kind of cooling device of steel plate, including：Upside cools down equipment, is carried out to the upper surface of steel plate in cooling segment cold
But；Downside cools down equipment, is cooled down to the lower surface of steel plate in cooling segment；Upside cools down equipment and downside cooling is set
It is standby to be above evenly arranged with several atomizing cooling nozzles, the atomization cooling installed in upside cooling equipment and downside cooling equipment
Nozzle 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；Equipment is inductively measured,
It is installed in the cooling equipment in upside, whether the head for incuding steel plate is more than upside cooling equipment and downside cools down the of equipment
One group of atomizing cooling nozzle；Control device is connect with equipment is inductively measured, for receiving the signal inductively measured in equipment,
And control the opening of all atomizing cooling nozzles and closing and all mists in the cooling equipment in upside and downside cooling equipment
Change the hydraulic pressure size that cooling nozzles spray；Upside is cooled down into equipment and downside cooling equipment is formed by cooling segment and is divided into
Three segments；
In the preceding one third distance of cooling segment, atomizing cooling nozzle cools down steel plate using low pressure, three/
In 2/1sts to three distances, atomizing cooling nozzle is pressed and is further cooled down to steel plate in using, at 2/3rds to ending away from
From interior, atomizing cooling nozzle finally cools down steel plate using high pressure；
Wherein the hydraulic pressure control of the atomizing cooling nozzle of first part at 30 bars hereinafter, but cannot be below 5 bars；Wherein second part
Atomizing cooling nozzle hydraulic pressure control at 50 bars hereinafter, but cannot be below 30 bars；The wherein atomizing cooling nozzle of Part III
Hydraulic pressure control not less than 100 bars, but 200 bars can not be higher than；
For first interval section, the angle of atomizing cooling nozzle is selected as 30-45 degree, for second interval section, mist
Change cooling nozzles angle and be selected as 45-55 degree, for 3rd interval section, atomizing cooling nozzle angle is selected as 60-75 degree；
Wherein when the steel plate to 20-50mm thickness is handled, first interval section atomizing cooling nozzle pressure and steel plate thickness
Ratio is between 0.5-0.8.
2. a kind of cooling device of steel plate, including：Upside cools down equipment, is carried out to the upper surface of steel plate in cooling segment cold
But；Downside cools down equipment, is cooled down to the lower surface of steel plate in cooling segment；Upside cools down equipment and downside cooling is set
It is standby to be above evenly arranged with several atomizing cooling nozzles, the atomization cooling installed in upside cooling equipment and downside cooling equipment
Nozzle 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；Equipment is inductively measured,
It is installed in the cooling equipment in upside, whether the head for incuding steel plate is more than upside cooling equipment and downside cools down the of equipment
One group of atomizing cooling nozzle；Control device is connect with equipment is inductively measured, for receiving the signal inductively measured in equipment,
And control the opening of all atomizing cooling nozzles and closing and all mists in the cooling equipment in upside and downside cooling equipment
Change the hydraulic pressure size that cooling nozzles spray；Upside is cooled down into equipment and downside cooling equipment is formed by cooling segment and is divided into
Four segments；
For the pressure of each segment nozzle, need to ensure the pressure that latter segment is sprayed than previous segment nozzle
It is slightly higher, and in from second interval section to 3rd interval section, the pressure of atomizing cooling nozzle used in each segment and the area
Between the pressure proportional of atomizing cooling nozzle used in the previous segment of section control in 1.1-1.5: 1 range, for the 4th area
Between the pressure of atomizing cooling nozzle should ensure that not less than 100 bars in section, while 200 bars can not be higher than, and to ensure its pressure
The size of power need to be higher than the pressure of the atomizing cooling nozzle of 3rd interval section；
Atomizing cooling nozzle angle increases than the angle of atomizing cooling nozzle in first interval section wherein in second interval section, increases
Angle be 3-10 degree；Atomizing cooling nozzle angle increases than the angle of atomizing cooling nozzle in second interval section in 3rd interval section
Add, increased angle is 3-10 degree；
Wherein when the steel plate to 20-50mm thickness is handled, first interval section atomizing cooling nozzle pressure and steel plate thickness
Ratio is between 0.5-0.8.
3. cooling device of steel plate according to claim 2, it is characterised in that：Atomizing cooling nozzle angle in second interval section
Angle than atomizing cooling nozzle in first interval section increases, and increased angle is 3-5 degree；Cooling spray is atomized in 3rd interval section
Mouth angle increases than the angle of atomizing cooling nozzle in second interval section, and increased angle is 3-5 degree.
4. carrying out cooling method to steel plate using the cooling device of steel plate described in any one of claim 1-3.
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| JPS6156722A (en) * | 1984-08-28 | 1986-03-22 | Kawasaki Steel Corp | Rapid cooling method nearby outlet side of hot finish rolling mill of hot rolled steel plate |
| JPS61193717A (en) * | 1985-02-20 | 1986-08-28 | Sumitomo Metal Ind Ltd | Uniform cooling method of steel plate |
| JPS62158825A (en) * | 1985-12-28 | 1987-07-14 | Nippon Steel Corp | Method for cooling hot rolled steel plate |
| CN86200393U (en) * | 1986-02-05 | 1987-05-13 | 冶金工业部钢铁研究总院 | Water jetting device |
| JP2722105B2 (en) * | 1989-04-14 | 1998-03-04 | 日新製鋼株式会社 | Prevention method of oil pattern generation during cold rolling of stainless steel strip |
| JPH0651206B2 (en) * | 1990-09-10 | 1994-07-06 | 日商岩井株式会社 | Cooling device for continuous strips |
| CN2261898Y (en) * | 1996-07-05 | 1997-09-10 | 鞍山钢铁公司 | Controlled cooling device for medium-thickness plate |
| JP3739934B2 (en) * | 1998-04-02 | 2006-01-25 | 新日本製鐵株式会社 | Uniform cooling method for thin steel sheet |
| WO2004014577A1 (en) * | 2002-08-08 | 2004-02-19 | Jfe Steel Corporation | Cooling device, manufacturing method, and manufacturing line for hot rolled steel band |
| RU2383402C2 (en) * | 2005-06-23 | 2010-03-10 | Ниппон Стил Корпорейшн | Facility for cooling sheet of heavy plate |
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| CN104785551B (en) | 2019-04-30 |
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