CN104785551B - Cooling device of steel plate - Google Patents
Cooling device of steel plate Download PDFInfo
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- CN104785551B CN104785551B CN201510178849.2A CN201510178849A CN104785551B CN 104785551 B CN104785551 B CN 104785551B CN 201510178849 A CN201510178849 A CN 201510178849A CN 104785551 B CN104785551 B CN 104785551B
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Abstract
A kind of cooling device of steel plate, it include: the cooling equipment in upside, downside cools down equipment, several atomizing cooling nozzles are evenly arranged in the cooling equipment of the cooling equipment in upside and downside, 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；It further include inductively measuring equipment and control equipment.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 technique
The manufacturing process of steel plate is usually to complete 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 monolith 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 the rate of temperature fall of plate interlude does not solve very well always.Its Producing reason is both ways: first is that due to
During the rolling process, head-tail mill speed is usually less than steel plate interlude to steel plate, causes head-tail temperature lower than in the middle part of steel plate；
Second is that head-tail is equivalent to three faces while contacting with cooling water in Cooling Process for Steel Plate Based, keep both ends more cooling than interlude faster.It is existing
There is technology since above-mentioned technical problem can not be overcome, cannot also guarantee the uniform cooling of steel plate on the whole, due to two parts temperature
Difference band carrys out the difference of plate property, will lead to the tissue of steel plate, performance also shows biggish otherness.
Solve the problems, such as at present one of this technological means by the material of final products direct topping and tail portion, but the hand
Waste of material brought by section is self-evident, 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 is consistent steel plate head endpiece temperature 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, so that the tissue at both ends cannot be made to keep phase with interlude
Together.
In addition, in actual production, keeping the steel billet of high temperature that can occur with the oxygen in air before rolling anti-there are also a bit
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 and in 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.
Summary of the invention
Equipment used in this application can improve in the cooling equipment of existing common various steel plates.On overcoming
State mentioned various technical problems.
Firstly, as one of component essential on cooling device " nozzle ", 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 selecting water flow directly to steel plate processing, and atomizing cooling nozzle is with higher
Controllability.Therefore, in this application, unless otherwise specified, the nozzle occurred is atomizing cooling nozzle.
In addition, the basic setup mode of cooling device is to include for the ease of controlling the rate and stability of cooling procedure
The upper and lower cooling equipment in two sides.That is the cooling equipment in upside, for being cooled down in cooling segment to the upper surface of hot rolled steel plate；
Downside cools down equipment, for cooling down in cooling segment to the lower surface of hot rolled steel plate.In the cooling equipment in upper and lower side
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 guarantee that the atomizing cooling nozzle in the cooling equipment in upper and lower two sides corresponds in vertical direction.
In general, hot rolled steel plate drops steel plate if atomizing cooling nozzle is used only when having just enter into cooling section
Wen Shi is not still avoided that the problem of head and tail portion have been equivalent to three faces while having 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, i.e., can generate 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.
It in other words, is exactly when steel plate carries out cooling section, when by control hot rolled steel plate head, tail portion and cooling interlude
Cooling water inflow, reduce hot rolled steel plate head, tail portion and interlude the temperature difference, improve monolith hot rolled steel plate rate of temperature fall it is consistent
Property.
The means specifically taken include: to use the opening of control equipment control nozzle in the control equipment of cooling device
With closure, equally, control equipment also can control the ejection pressure of each group of atomizing cooling nozzle.
Convenient for statement, we can corresponding nozzle be from left to right on upright position by the cooling equipment in upper and lower two sides
Successively it is defined as first group of atomizing cooling nozzle, second group of atomizing cooling nozzle ... n-th group atomizing cooling nozzle.
On cooling device, measurement of inductance equipment is installed, is mounted on the starting fragment position of the cooling equipment in upside, is used for
Incude hot rolled steel plate head whether on upright position more than first group atomizing cooling nozzle, can be used for incude 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 inductively measuring equipment and sensing that the head of hot rolled steel plate alreadys exceed
Equipment is controlled, control equipment will open first group of atomizing cooling nozzle, and first group of nozzle starts cooling to hot rolled steel plate ejection
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,
Second group of nozzle, second group of spray can be opened when the head of hot rolled steel plate is more than second group of atomizing cooling nozzle by controlling equipment
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 equipment successively can also be opened rear several groups of nozzles at corresponding time point.
That is, the nozzle that is exceeded is opened only when the upright position of steel plate head is more than a certain group of nozzle
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 the actual situation, generally make the angle of spray angle Yu 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 tilt angle of all nozzles is set as identical, but sometimes for reaching better effect, example
Such as de-scaling effect mentioned below, the nozzle high for hydraulic pressure should make the angle of spray angle and steel plate direction of advance big by one
A bit preferably, for the content of this respect, we be 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 on the end face of steel plate.
And for the hot rolled steel plate in being continuously advanced, nozzle can keep stable state, not need further to 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 tail portion of steel plate is more than
It is transmitted to control equipment, control equipment 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
Be it is preset, therefore, do not need additional measurement of inductance equipment, it is only necessary to according to the interval between nozzle, hot-rolled steel yet
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 equipment 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, and 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
Out, control equipment 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 equipment.Generally can be selected laser induced measuring device or other.
For controlling equipment, PLC device, i.e. programmable logic controller (PLC) (programmable logic are generally selected
Controller), internal program storage, for executing logical operation, the operation 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 brought 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, available tissue identical with interlude.And the improvement to existing equipment
Be to be relatively easy to, do not need input cost too much, selected component, such as atomizing cooling nozzle, inductively measure equipment,
It is also facile from the market for controlling equipment.
Further improvement for the application 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 has been disclosed in the prior art, 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, can adopt
It is removed with carrying out high-pressure water descaling in roughing mill entrance side per pass, and further 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 color difference of hot rolling acid-cleaning plate belt steel surface.However, above-mentioned side
The problem of method, is or not can avoid using remaining oxide scale layer, so that remaining firecoat be made to be retained in final products
Table and, thus be unable to satisfy 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 can satisfy 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 consider the low cost using low hydraulic pressure, it is also considered that high hydraulic pressure to remaining firecoat
The validity of removal.De-scaling is realized using the hydraulic pressure of two or more different pressures.
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 and steel plate is made to generate removing.
For being only used only low hydraulic pressure this part for being insufficient to allow oxide scale layer to fall off from steel plate, 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 used by the application illustrates is that cooling section is divided into three parts, 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
It is interior, it is pressed in atomizing cooling nozzle use and steel plate is further cooled down, 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 is at 50 bars hereinafter, but cannot be below 30 bars.Its
The hydraulic pressure control of the atomizing cooling nozzle of middle Part III is being not less than 100 bars, but can not be higher than 200 bars, otherwise produced
Cost it is excessively high, and further deformation can be generated to relatively thin steel plate, to influence product final mass.
Equally, cooling section can also be 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 be it is identical, seek to guarantee
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 segment
It is interior, the cooling spray of atomization used in the pressure of atomizing cooling nozzle used in each segment and the previous segment of the segment
The pressure proportional of mouth controls within the scope of 1.1-1.5:1, is preferably in a proportion of 1.25.But for being atomized cooling spray in N segment
The pressure of mouth should ensure that not less than 100 bars, while can not be higher than 200 bars, and guarantee 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 for thickness, but be not less than the steel of 5mm
When plate is handled, the ratio of first interval section atomizing cooling nozzle pressure and steel plate thickness is 0.4 hereinafter, but to guarantee 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 be can choose
Smaller, and for terminal section, the size of angle can choose 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 being 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 being used only for the technique of high pressure nozzle, cost is reduced, the removal rate for the firecoat that enterprise more pays close attention to
It improves.For being used only for the technique of 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.
Detailed description of the invention
Fig. 1 is the first structure 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 --- the cooling equipment in upside,
3 --- the cooling equipment in downside, 4-1 --- first group of atomizing cooling nozzle, 4-n --- n-th group atomizing cooling nozzle, 5 --- sense
Answer measuring device, 6 --- control equipment.
Specific embodiment
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
For 2 and the cooling equipment 3 in downside, several atomization cooling sprays are evenly arranged in the cooling equipment 3 of the cooling equipment 2 in upside and downside
The angular range of mouth, atomizing cooling nozzle and 1 direction of advance of steel plate is 30-75 degree (not shown).
Cooling device of steel plate further includes inductively measuring equipment 5, inductively measures equipment 5 and is installed in the cooling equipment 2 in upside, uses
In induction steel plate 1 head 1-1 whether be more than the cooling equipment of the cooling equipment in upside and downside first group of atomizing cooling nozzle 4-
1, and head 1-1 for incuding steel plate 1 whether be more than the cooling equipment of the cooling equipment in upside and downside n-th group atomization it is cold
But nozzle 4-n.
Cooling device of steel plate further includes control equipment 6, and control equipment 6 is connect with equipment 5 is inductively measured, for receiving induction
Signal on measuring device 5, meanwhile, control equipment 6 is also to atomization all in the cooling equipment 3 of the cooling equipment 2 in upside and downside
Cooling nozzles are controlled, i.e., control atomizing cooling nozzle is on and off, also control 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
For 2 and the cooling equipment 3 in downside, several atomization cooling sprays are evenly arranged in the cooling equipment 3 of the cooling equipment 2 in upside and downside
The angular range of mouth, atomizing cooling nozzle and 1 direction of advance of steel plate is 30-75 degree (not shown).
Cooling device of steel plate further includes inductively measuring equipment 5, inductively measures equipment 5 and is installed in the cooling equipment 2 in upside, uses
In induction steel plate 1 head 1-1 whether be more than the cooling equipment of the cooling equipment in upside and downside first group of atomizing cooling nozzle 4-
1, and head 1-1 for incuding steel plate 1 whether be more than the cooling equipment of the cooling equipment in upside and downside n-th group atomization it is cold
But nozzle 4-n.
Cooling device of steel plate further includes control equipment 6, and control equipment 6 is connect with equipment 5 is inductively measured, for receiving induction
Signal on measuring device 5, meanwhile, control equipment 6 is also to atomization all in the cooling equipment 3 of the cooling equipment 2 in upside and downside
Cooling nozzles are controlled, i.e., control atomizing cooling nozzle is on and off, also control all atomizing cooling nozzle institutes
Spray the size of hydraulic pressure.
It is formed by cooling section by the cooling equipment of the cooling equipment in upside and downside, in preceding one third distance
Low pressure atomizing cooling nozzles are arranged in (i.e. I region), in one third to 2/3rds distances (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), 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, and 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, and 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, and 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.Including the cooling equipment 2 in upside and downside
Several atomizing cooling nozzles, atomization cooling are evenly arranged in cooling equipment 3, the cooling equipment 2 in upside 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 the cooling equipment 2 in upside, uses
In induction steel plate 2 head 1-1 whether be more than the cooling equipment of the cooling equipment in upside and downside first group of atomizing cooling nozzle.
Cooling device of steel plate further includes control equipment 6, and control equipment 6 is connect with equipment 5 is inductively measured, for receiving induction
Signal on measuring device 5, meanwhile, control equipment 6 is also to atomization all in the cooling equipment 3 of the cooling equipment 2 in upside and downside
Cooling nozzles are controlled, i.e., control atomizing cooling nozzle is on and off, also control all atomizing cooling nozzle institutes
Spray the size of hydraulic pressure.
Cooling section is formed by by the cooling equipment of the cooling equipment in upside and downside, five segments are averagely divided into,
In its preceding 1/5th distance, low pressure atomizing cooling nozzles are set, 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, and 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, and 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, and 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, and 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, and preferably 120-160 bars, more preferable 120-130 bars.
Using device described in embodiment 1-3 work when, open 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 equipment 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 which calculating steel plate head in upright position is more than that second group of atomization is cold
But the time of nozzle, control equipment 6 can be when the head 1-1 of hot rolled steel plate be more than second group of atomizing cooling nozzle, opening the
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 as first group of nozzle 4-1 that the upright position for sensing steel plate tail 1-2 is more than
Equipment 5 by the signal sensed be transmitted to control equipment 6, control equipment 6 will close first group of atomizing cooling nozzle 4-1, 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 hot rolled steel plate tail portion be calculated on upright position more than the time of second group of atomizing cooling nozzle, control is set
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
Out, control equipment successively can also close rear several groups of nozzles at corresponding time point, until last is organized the cooling spray of atomization
Mouth is closed.
Claims (2)
1. a kind of cooling device of steel plate, comprising: the cooling equipment in upside carries out cold in upper surface of the cooling segment to steel plate
But；Downside cools down equipment, cools down in cooling segment to the lower surface of steel plate；The cooling equipment in upside and downside cooling are set
Standby to be above evenly arranged with several atomizing cooling nozzles, the atomization installed in the cooling equipment of the cooling equipment in upside and downside is cooling
Nozzle is corresponding up and down；Inductively measure equipment, be installed in the cooling equipment in upside, for incude steel plate head whether be more than
First group of atomizing cooling nozzle of the cooling equipment of the cooling equipment in side and downside；Equipment is controlled, connect, uses with equipment is inductively measured
The signal in equipment is inductively measured in reception, and controls all atomizations cooling sprays in the cooling equipment of the cooling equipment in upside and downside
The water pressure that the atomizing cooling nozzle on and off and all of mouth sprays；
The cooling equipment of the cooling equipment in upside and downside is formed by cooling segment and is averagely divided into three segments；
In upside, the cooling equipment of cooling equipment and downside is formed by cooling segment, in preceding one third distance, setting
Low pressure atomizing cooling nozzles in one third distance to 2/3rds distances, press atomizing cooling nozzle in setting, 2/3rds away from
From at ending, high-pressure atomization cooling nozzles are set；
For the angle of atomizing cooling nozzle and steel plate direction of advance, for first interval section, the folder of atomizing cooling nozzle
Angle is selected as 30-45 degree, and for second interval section, atomizing cooling nozzle angle is selected as 45-55 degree, for 3rd interval
For section, atomizing cooling nozzle angle is selected as 60-75 degree；
The hydraulic pressure control of the low pressure atomizing cooling nozzles is at 30 bars hereinafter, but cannot be below 5 bars；The cooling spray of medium pressure atomization
The hydraulic pressure control of mouth is at 50 bars hereinafter, but cannot be below 30 bars；The hydraulic pressure control of the high-pressure atomization cooling nozzles is being not less than
100 bars, but not above 200 bars；
When being less than 15mm for thickness, but being handled not less than the steel plate of 5mm, first interval section atomizing cooling nozzle hydraulic pressure with
The ratio of steel plate thickness is 0.4 hereinafter, but to guarantee that the minimum hydraulic pressure of atomizing cooling nozzle cannot be below 5 bars.
2. carrying out cooling method to steel plate using cooling device of steel plate described in claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510178849.2A CN104785551B (en) | 2013-11-07 | 2013-11-07 | Cooling device of steel plate |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310545017.0A CN103567238B (en) | 2013-11-07 | 2013-11-07 | Cooling device of steel plate |
| CN201510178849.2A CN104785551B (en) | 2013-11-07 | 2013-11-07 | Cooling device of steel plate |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310545017.0A Division CN103567238B (en) | 2013-11-07 | 2013-11-07 | Cooling device of steel plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104785551A CN104785551A (en) | 2015-07-22 |
| CN104785551B true CN104785551B (en) | 2019-04-30 |
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| CN103567238A (en) | 2014-02-12 |
| CN103567238B (en) | 2015-08-26 |
| CN104785550A (en) | 2015-07-22 |
| CN104785551A (en) | 2015-07-22 |
| CN104785550B (en) | 2018-07-20 |
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