CN108728630A - Method and device for avoiding deviation of strip steel - Google Patents

Method and device for avoiding deviation of strip steel Download PDF

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Publication number
CN108728630A
CN108728630A CN201810402465.8A CN201810402465A CN108728630A CN 108728630 A CN108728630 A CN 108728630A CN 201810402465 A CN201810402465 A CN 201810402465A CN 108728630 A CN108728630 A CN 108728630A
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roller
furnace
strip steel
deviation
deviation correcting
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CN108728630B (en
Inventor
任伟超
孙健新
王晓广
张学范
王道金
李冠雄
王硕
张旭亮
宁媛媛
任秋红
巫雪松
马壮
张阳阳
林英哲
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Shougang Jingtang United Iron and Steel Co Ltd
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Shougang Jingtang United Iron and Steel Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/562—Details
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D11/00—Process control or regulation for heat treatments

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

Abstract

The invention provides a method and a device for avoiding deviation of strip steel, wherein the method comprises the following steps: acquiring the maximum width of a furnace wall and the width of strip steel in the vertical annealing furnace; determining the offset delta X of the cut and rubbed furnace wall of the strip steel according to the maximum width of the furnace wall and the width of the strip steel; determining a target deviation correcting roller and a first deviation correcting roller which is closest to the target deviation correcting roller; acquiring the number of furnace rollers between a target deviation correcting roller and a first deviation correcting roller and the running distance of the strip steel between the target deviation correcting roller and the first deviation correcting roller; determining the maximum deviation amount delta X of the strip steel at the target deviation rectifying roller according to the number of furnace rollers, the running distance, the maximum deviation correcting angle and the maximum deviation correcting capacity value of the target deviation rectifying roller and the deviation correcting amount of the target deviation rectifying roller to the strip steelact(ii) a Determination of Δ XactWhether or not it is greater than Δ X, if Δ XactIf the temperature is more than delta X, the product specification and the annealing temperature of the strip steel are obtained; determining the lowest running speed of the steel grade according to the product specification and the annealing temperature of the strip steel; and controlling the furnace zone speed to be reduced to the lowest operation speed.

Description

Method and device for avoiding deviation of strip steel
Technical Field
The invention belongs to the technical field of steel smelting, and particularly relates to a method and a device for avoiding deviation of strip steel.
Background
With the increasing application range of cold rolled products in various industries, the specifications of the products are widened, for example, the thickness of a packaging tank for food is as thin as 0.12mm, the width of a high-strength wide automobile plate can reach 2080mm, the sizes of the products mainly depend on acid rolling, and the physical properties such as stamping, tensile strength and the like depend on an annealing process. The annealing process is stable without the stable operation of the strip steel in the furnace, namely the stable plate passing technology. The deviation of the strip steel is one of the main problems influencing the stable operation in the furnace.
Once the strip steel deviates in the furnace, the equipment in the furnace can be scraped or the strip steel is over-burnt.
Disclosure of Invention
Aiming at the problems in the prior art, the embodiment of the invention provides a method and a device for avoiding the deviation of strip steel, which are used for solving the technical problems that equipment in a furnace is scratched or the strip steel is burnt excessively due to the fact that the strip steel is easy to deviate in the furnace in the prior art.
The invention provides a method for avoiding deviation of strip steel, which comprises the following steps:
acquiring the maximum width of a furnace wall and the width of strip steel in the vertical annealing furnace;
determining the offset delta X of the cut and rubbed furnace wall of the strip steel according to the maximum width of the furnace wall and the width of the strip steel;
determining a target deviation correcting roller and a first deviation correcting roller which is closest to the target deviation correcting roller;
acquiring the number of furnace rollers between the target deviation correcting roller and the first deviation correcting roller and the running distance of the strip steel between the target deviation correcting roller and the first deviation correcting roller;
determining the maximum deviation amount delta X of the strip steel at the target deviation rectifying roller according to the number of the furnace rollers, the running distance, the maximum deviation rectifying angle and the maximum deviation rectifying capacity value of the target deviation rectifying roller and the deviation rectifying amount of the target deviation rectifying roller to the strip steelact；
Determining said Δ XactWhether or not greater than said Δ X, if said Δ XactIs greater than theDelta X, obtaining the product specification and the annealing temperature of the strip steel; determining the lowest running speed of the steel grade according to the product specification of the strip steel and the annealing temperature;
and controlling the furnace zone speed to be reduced to the lowest operation speed.
In the above-mentioned scheme, according to the furnace wall maximum width reaches the belted steel width is confirmed the belted steel is cut and is rubbed the offset delta X of furnace wall includes:
according to the formula Δ X ═ W1-W)/2, determining the offset delta X of the steel strip rubbing against the furnace wall; wherein, the W1The maximum width of the furnace wall is W, and the width of the strip steel is W.
In the scheme, the maximum deviation amount delta X of the strip steel at the target deviation correcting roller is determined according to the number of the furnace rollers, the running distance, the maximum deviation correcting angle of the target deviation correcting roller, the maximum deviation correcting capacity value and the deviation correcting amount of the target deviation correcting roller to the strip steelactThe method comprises the following steps:
according to the formulaDetermining the maximum deviation delta X of the strip steel at the target deviation correcting rolleract(ii) a Wherein,
k is a correction coefficient of the furnace roller for self-correction, andthe running distance is the running distance, n is the number of the furnace rollers, gamma is the deviation correction amount of the target deviation correction roller to the strip steel, α is the maximum deviation correction angle of the target deviation correction roller, and delta X is the maximum deviation correction angle of the target deviation correction rollermaxAnd the maximum deviation correcting capacity value of the target deviation correcting roller is obtained.
In the scheme, the correction coefficient of the self-correcting furnace roller is (kappa) according to a formulaR-total-κR-TL)/(Rtotal-RTL)*(W-RTL)-κR-TLDetermining(ii) a Wherein,
the kappaR-totalWhen the width of the strip steel is consistent with the width of the working surface of the furnace roller, the self-correction coefficient of the furnace roller is kappaR-TLWhen the width of the strip steel is equal to the length of the furnace roller platform, the self-correcting coefficient of the furnace roller is obtained; the R istotalIs the length of the working surface of the furnace roller, RTLThe furnace roller platform is long, and W is the width of the strip steel.
In the above scheme, the method further comprises: and acquiring the actual offset X of the strip steel, judging whether the actual offset X is more than or equal to 0.5X delta X, and if so, controlling the furnace area speed to be reduced to the lowest operation speed.
The invention also provides a device for avoiding the deviation of the strip steel, which comprises:
the first acquisition unit is used for acquiring the maximum width of a furnace wall and the width of strip steel in the vertical annealing furnace;
the first determining unit is used for determining the offset delta X of the steel strip rubbing the furnace wall according to the maximum width of the furnace wall and the width of the steel strip;
the second acquisition unit is used for determining the target deviation correcting roller and the first deviation correcting roller which is closest to the target deviation correcting roller;
acquiring the number of furnace rollers between the target deviation correcting roller and the first deviation correcting roller and the running distance of the strip steel between the target deviation correcting roller and the first deviation correcting roller;
a second determining unit, configured to determine, according to the number of furnace rollers, the running distance, the maximum deviation angle of the target deviation correcting roller, the maximum deviation correcting capability value, and the deviation correcting amount of the target deviation correcting roller to the strip steel, the maximum deviation Δ X of the strip steel at the target deviation correcting rolleract；
A control unit for judging the Δ XactWhether or not greater than said Δ X, if said Δ XactGreater than Δ X, then obtainTaking the product specification and the annealing temperature of the strip steel; determining the lowest running speed of the steel grade according to the product specification and the annealing temperature of the strip steel; and controlling the furnace zone speed to be reduced to the lowest operation speed.
In the foregoing solution, the first determining unit is specifically configured to:
according to the formula Δ X ═ W1-W)/2, determining the offset delta X of the steel strip rubbing against the furnace wall; wherein, the W1The maximum width of the furnace wall is W, and the width of the strip steel is W.
In the foregoing solution, the second determining unit is specifically configured to:
according to the formulaDetermining the maximum deviation delta X of the strip steel at the target deviation correcting rolleract(ii) a Wherein,
k is a correction coefficient of the furnace roller for self-correction, andthe running distance is the running distance, n is the number of the furnace rollers, gamma is the deviation correction amount of the target deviation correction roller to the strip steel, α is the maximum deviation correction angle of the target deviation correction roller, and delta X is the maximum deviation correction angle of the target deviation correction rollermaxAnd the maximum deviation correcting capacity value of the target deviation correcting roller is obtained.
In the scheme, the correction coefficient of the self-correcting furnace roller is (kappa) according to a formulaR-total-κR-TL)/(Rtotal-RTL)*(W-RTL)-κR-TLDetermining; wherein,
the kappaR-totalWhen the width of the strip steel is consistent with the width of the working surface of the furnace roller, the self-correction coefficient of the furnace roller is kappaR-TLWhen the width of the strip steel is equal to the length of the furnace roller platform, the self-correcting coefficient of the furnace roller is obtained; the R istotalIs the length of the working surface of the furnace roller, RTLThe furnace roller platform is long, and W is the width of the strip steel.
In the foregoing solution, the second obtaining unit is further configured to:
acquiring the actual offset X of the strip steel;
the control unit is further configured to: and judging whether the actual offset meets the condition that X is more than or equal to 0.5X delta X, and if so, controlling the furnace zone speed to be reduced to the lowest operation speed.
The invention provides a method and a device for avoiding deviation of strip steel, wherein the method comprises the following steps: acquiring the maximum width of a furnace wall and the width of strip steel in the vertical annealing furnace; determining the offset delta X of the cut and rubbed furnace wall of the strip steel according to the maximum width of the furnace wall and the width of the strip steel; determining a target deviation correcting roller and a first deviation correcting roller which is closest to the target deviation correcting roller; acquiring the number of furnace rollers between the target deviation correcting roller and the first deviation correcting roller and the running distance of the strip steel between the target deviation correcting roller and the first deviation correcting roller; determining the maximum deviation amount delta X of the strip steel at the target deviation rectifying roller according to the number of the furnace rollers, the running distance, the maximum deviation rectifying angle and the maximum deviation rectifying capacity value of the target deviation rectifying roller and the deviation rectifying amount of the target deviation rectifying roller to the strip steelact(ii) a Determining said Δ XactWhether or not greater than said Δ X, if said Δ XactIf the speed of the furnace zone is greater than the delta X, the speed of the furnace zone is controlled to be reduced to the lowest operation speed, and the range of the lowest operation speed is 30-220 m/min; thus, the boundary condition delta X of the equipment in the steel strip scraping furnace is determinedactIf Δ X ═ Δ XactIf the deviation is larger than the delta X, the deviation risk of the strip steel is determined, the furnace zone speed is controlled to be reduced to the lowest operation speed of the corresponding steel grade, the deviation of the strip steel is effectively avoided, and the problem that the strip steel scratches and rubs equipment in the furnace or the strip steel is over-burnt due to the deviation of the strip steel is further avoided.
Drawings
FIG. 1 is a schematic flow chart of a method for avoiding strip steel deviation according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a device for preventing strip steel from deviating provided by the second embodiment of the invention.
Detailed Description
In order to solve the technical problems that equipment in a furnace is scratched or strip steel is burnt excessively caused by the fact that strip steel is prone to deviation in the furnace in the prior art, the invention provides a method and a device for avoiding the deviation of the strip steel, wherein the method comprises the following steps: acquiring the maximum width of a furnace wall and the width of strip steel in the vertical annealing furnace; determining the offset delta X of the cut and rubbed furnace wall of the strip steel according to the maximum width of the furnace wall and the width of the strip steel; determining a target deviation correcting roller and a first deviation correcting roller which is closest to the target deviation correcting roller; acquiring the number of furnace rollers between the target deviation correcting roller and the first deviation correcting roller and the running distance of the strip steel between the target deviation correcting roller and the first deviation correcting roller; determining the maximum deviation amount delta X of the strip steel at the target deviation rectifying roller according to the number of the furnace rollers, the running distance, the maximum deviation rectifying angle and the maximum deviation rectifying capacity value of the target deviation rectifying roller and the deviation rectifying amount of the target deviation rectifying roller to the strip steelact(ii) a Determining said Δ XactWhether or not greater than said Δ X, if said Δ XactAnd if the speed of the furnace zone is greater than the delta X, the speed of the furnace zone is controlled to be reduced to the lowest operation speed.
The technical solution of the present invention is further described in detail by the accompanying drawings and the specific embodiments.
Example one
The embodiment provides a method for avoiding deviation of strip steel, and as shown in fig. 1, the method comprises the following steps:
s110, acquiring the maximum width of a furnace wall and the width of strip steel in the vertical annealing furnace;
in order to avoid the scratch of equipment in the furnace caused by the deviation of the strip steel, the maximum width of the furnace wall in the vertical annealing furnace and the width of the strip steel need to be obtained firstly in the step so as to determine the offset delta X of the strip steel scratch on the furnace wall.
S111, determining the offset delta X of the cut steel strip rubbing the furnace wall according to the maximum width of the furnace wall and the width of the steel strip;
in this step, confirm according to formula (1) the belted steel cuts and rubs the offset delta X of furnace wall:
ΔX＝(W1-W)/2 (1)
wherein, the W1The maximum width of the furnace wall is W, and the width of the strip steel is W.
S112, acquiring the number of furnace rollers between the target deviation correcting roller and the first deviation correcting roller and the running distance of the strip steel between the target deviation correcting roller and the first deviation correcting roller;
in the step, a plurality of deviation correcting rollers are further included in the vertical annealing furnace, and the actual deviation amount of the target deviation correcting roller is determined, so that the target deviation correcting roller and a first deviation correcting roller which is closest to the target deviation correcting roller are determined; and acquiring the number of furnace rollers between the target deviation correcting roller and the first deviation correcting roller and the running distance of the strip steel between the target deviation correcting roller and the first deviation correcting roller.
S113, determining the maximum deviation amount delta X of the strip steel at the target deviation rectifying roller according to the number of the furnace rollers, the running distance, the maximum deviation rectifying angle and the maximum deviation rectifying capacity value of the target deviation rectifying roller and the deviation rectifying amount of the target deviation rectifying roller to the strip steelact；
Then, in the step, the maximum deviation delta X of the strip steel at the target deviation correcting roller can be determined according to the formula (2)act：
Wherein k is a correction coefficient of the self-correcting of the furnace roller, and the value of k is generally 0.5-1; the M is1For the target deflection roller, M0Is the first deviation correcting rollerthe running distance is the running distance, n is the number of furnace rollers between the target deviation correcting roller and the first deviation correcting roller, gamma is the deviation correcting amount of the target deviation correcting roller to the strip steel, α is the maximum deviation correcting angle of the target deviation correcting roller, and delta X is the maximum deviation correcting angle of the target deviation correcting rollermaxAnd the maximum deviation correcting capacity value of the target deviation correcting roller is obtained.
Here, the correction coefficient k of the self-correcting error of the furnace roller can be obtained according to the formula (4):
κ＝(κR-total-κR-TL)/(Rtotal-RTL)*(W-RTL)-κR-TL(4)
in the formula (4), the kR-totalWhen the width of the strip steel is consistent with the width of a working surface of the furnace roller, the self-correction coefficient of the furnace roller generally takes a value of 0-1; the kappaR-TLWhen the width of the strip steel is equal to the length of a furnace roller platform, the self-correction coefficient of the furnace roller generally takes a value of 0-1; the R istotalIs the length of the working surface of the furnace roller, RTLThe furnace roller platform is long, and W is the width of the strip steel.
S114, judging the delta XactWhether or not greater than said Δ X, if said Δ XactIf the temperature is larger than the delta X, the product specification and the annealing temperature of the strip steel are obtained; determining the lowest running speed of the steel grade according to the product specification and the annealing temperature of the strip steel; the furnace zone speed is controlled to be reduced to the lowest operation speed.
When the maximum deviation delta X of the strip steel at the target deviation correcting rolleractAnd after the offset delta X of the furnace wall for scraping and rubbing the strip steel is determined, judging the delta X in the actual operationactWhether or not greater thanSaid Δ X, if said Δ XactIf the temperature is more than the delta X, obtaining the product specification, the carbon content, the annealing temperature and the like of the steel grade, and determining the lowest running speed of the steel grade according to the product specification and the annealing temperature of the strip steel; the furnace zone speed is controlled to be reduced to the lowest operation speed. The product specifications include strip thickness and width.
Here, the minimum running speed is related to the width, thickness, steel grade and annealing temperature of the strip steel, and the value range is generally: 30 to 220 m/min.
For example, taking the common carbon steel of a continuous annealing unit of a certain steel plant as an example, the table of the lowest operation speed of the common carbon steel in a furnace zone at 780 ℃ is shown in table 1:
TABLE 1
In Table 1, W is the strip width and t is the strip thickness.
In addition, in this embodiment, in order to prevent the strip steel furnace from being over-burned, an actual offset X of the strip steel is further obtained, and it is determined whether the actual offset X is greater than or equal to 0.5 × Δ X in the actual operation, and if so, the furnace zone speed is controlled to be reduced to the minimum operation speed.
Based on the same inventive concept, the invention also provides a device for avoiding the deviation of the strip steel, as described in the second embodiment.
Example two
Corresponding to the first embodiment, this embodiment also provides a device for avoiding the deviation of the strip steel, as shown in fig. 2, the device includes: a first acquisition unit 21, a first determination unit 22, a second acquisition unit 23, a second determination unit 24, and a control unit 25; wherein,
in order to avoid the scratch of equipment in the furnace caused by the deviation of the strip steel, the first obtaining unit 21 is used for obtaining the maximum width of the furnace wall in the vertical annealing furnace and the width of the strip steel.
Then the first determining unit 22 is configured to determine an offset Δ X of the steel strip scraping against the furnace wall according to formula (1):
ΔX＝(W1-W)/2 (1)
wherein, the W1The maximum width of the furnace wall is W, and the width of the strip steel is W.
The second obtaining unit 23 is configured to determine the target deviation correcting roller and the first deviation correcting roller closest to the target deviation correcting roller; and acquiring the number of furnace rollers between the target deviation correcting roller and the first deviation correcting roller and the running distance of the strip steel between the target deviation correcting roller and the first deviation correcting roller.
The second determination unit 24 can determine the maximum deviation amount Δ X of the strip at the target deviation correcting roll according to the formula (2)act：
Wherein k is a correction coefficient of the self-correcting of the furnace roller, and the value of k is generally 0.5-1; the M is1For the target deflection roller, M0Is the first deviation correcting rollerthe running distance is the running distance, n is the number of furnace rollers between the target deviation correcting roller and the first deviation correcting roller, gamma is the deviation correcting amount of the target deviation correcting roller to the strip steel, α is the maximum deviation correcting angle of the target deviation correcting roller, and delta X is the maximum deviation correcting angle of the target deviation correcting rollermaxAnd the maximum deviation correcting capacity value of the target deviation correcting roller is obtained.
Here, the correction coefficient k of the self-correcting error of the furnace roller can be obtained according to the formula (4):
κ＝(κR-total-κR-TL)/(Rtotal-RTL)*(W-RTL)-κR-TL(4)
in the formula (4), the kR-totalWhen the width of the strip steel is consistent with the width of a working surface of the furnace roller, the self-correction coefficient of the furnace roller generally takes a value of 0-1; the kappaR-TLWhen the width of the strip steel is equal to the length of a furnace roller platform, the self-correction coefficient of the furnace roller generally takes a value of 0-1; the R istotalIs the length of the working surface of the furnace roller, RTLThe furnace roller platform is long, and W is the width of the strip steel.
When the maximum deviation delta X of the strip steel at the target deviation correcting rolleractAfter the offset delta X of the furnace wall for scraping and rubbing the strip steel is determined, the control unit 25 is used for judging the delta X in actual operationactWhether or not greater than said Δ X, if said Δ XactIf the temperature is more than the delta X, obtaining the product specification, the carbon content, the annealing temperature and the like of the steel grade, and determining the lowest running speed of the steel grade according to the product specification and the annealing temperature of the strip steel; the furnace zone speed is controlled to be reduced to the lowest operation speed. The product specifications include strip thickness and width.
Here, the minimum running speed is related to the width, thickness, steel grade and annealing temperature of the strip steel, and the value range is generally: 30 to 220 m/min.
For example, taking the common carbon steel of a continuous annealing unit of a certain steel plant as an example, the table of the lowest operation speed of the common carbon steel in a furnace zone at 780 ℃ is shown in table 1:
TABLE 1
In Table 1, W is the strip width and t is the strip thickness.
In addition, in this embodiment, in order to prevent the strip steel furnace from being over-burned, the second obtaining unit 23 needs to obtain an actual offset X of the strip steel, and the control unit 25 is further configured to determine whether the actual offset X is greater than or equal to 0.5 × Δ X in the actual operation, and if so, control the furnace zone speed to be reduced to the minimum operation speed.
EXAMPLE III
In practical application, take a first steel Jingtang cold rolling certain unit as an example: the strip steel sequentially passes through an inlet rectification roller CPC8.1, an outlet rectification roller CPC8.2 and a target rectification roller selected from the CPC8.2 in the heating section, and the inlet rectification roller is the first rectification roller.
Maximum width W of furnace wall12900mm, strip width W: 1000-2080 mm, 900mm of furnace roller platform length and 2200mm of furnace roller working surface length.
The maximum deviation correcting angle of the target deviation correcting roller is 3.18 degrees, the number of furnace rollers for the strip steel to pass through from the target deviation correcting roller to the first deviation correcting roller is 17, and the running distance is 406000 mm.
The offset of the cut strip steel against the furnace wall is delta X (W)1-W)/2＝(2900-W)/2。
The belted steel takes place the off tracking behind the first roller of rectifying, reaches the biggest ability of rectifying that the first roller of rectifying can bear, and belted steel rectifies the upper limit of rectifying that the roller reached the target at the target roller of rectifying, promptly:
the deviation correction amount gamma of the target deviation correction roller to the strip steel is 1, the maximum deviation correction angle α is 3.18 degrees, and the maximum deviation correction capability value delta X of the target deviation correction rollermax＝170mm；
Further,. kappa.R-total：0.76；κR-TL：0.8；Rtotal：2200mm；RTL: 900mm, then k ═ k (k)R-total-κR-TL)/(Rtotal-RTL)*(W-RTL)-κR-TL＝-3.07692*10-5*(W-900)-0.91；
Then the maximum deviation amount of the strip steel at the position of the target deviation correcting roller is as follows:
then the boundary conditions of the equipment in the furnace scraped at the target deviation rectifying roller of the strip steel are as follows:
(2900-W)/2≥(-3.07692*10-5*(W-900)-0.82)17406000 sin (3.18 °) +170, therefore, when (2900-W)/2 ≧ 3.07692 x 10-5*(W-900)-0.82)17406000 sin (3.18 °) +170 °, the strip was running normally; and conversely, the speed of the furnace area is reduced to the lowest operation speed, so that the situation of scraping and rubbing equipment is avoided.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.

Claims (10)

1. A method for avoiding deviation of strip steel is characterized by comprising the following steps:
acquiring the maximum width of a furnace wall and the width of strip steel in the vertical annealing furnace;
determining the offset delta X of the cut and rubbed furnace wall of the strip steel according to the maximum width of the furnace wall and the width of the strip steel;
determining a target deviation correcting roller and a first deviation correcting roller which is closest to the target deviation correcting roller;
acquiring the number of furnace rollers between the target deviation correcting roller and the first deviation correcting roller and the running distance of the strip steel between the target deviation correcting roller and the first deviation correcting roller;
determining the maximum deviation amount delta X of the strip steel at the target deviation rectifying roller according to the number of the furnace rollers, the running distance, the maximum deviation rectifying angle and the maximum deviation rectifying capacity value of the target deviation rectifying roller and the deviation rectifying amount of the target deviation rectifying roller to the strip steelact；
Determining said Δ XactWhether or not greater than said Δ X, if said Δ XactIf the temperature is larger than the delta X, the product specification and the annealing temperature of the strip steel are obtained; determining the lowest running speed of the steel grade according to the product specification of the strip steel and the annealing temperature;
and controlling the furnace zone speed to be reduced to the lowest operation speed.
2. The method of claim 1, wherein determining an offset Δ X of the strip steel rubbing against the furnace wall according to the maximum width of the furnace wall and the width of the strip steel comprises:
according to the formula Δ X ═ W1-W)/2, determining the offset delta X of the steel strip rubbing against the furnace wall; wherein, the W1The maximum width of the furnace wall is W, and the width of the strip steel is W.
3. The method of claim 1, wherein the maximum deviation amount Δ X of the strip steel at the target deviation rectification roll is determined according to the number of the furnace rolls, the running distance, the maximum deviation rectification angle of the target deviation rectification roll, the maximum deviation rectification capacity value and the deviation rectification amount of the target deviation rectification roll to the strip steelactThe method comprises the following steps:
according to the formulaDetermining the maximum deviation delta X of the strip steel at the target deviation correcting rolleract(ii) a Wherein,
k is a correction coefficient of the furnace roller for self-correction, andthe running distance is the running distance, n is the number of the furnace rollers, gamma is the deviation correction amount of the target deviation correction roller to the strip steel, α is the maximum deviation correction angle of the target deviation correction roller, and delta X is the maximum deviation correction angle of the target deviation correction rollermaxAnd the maximum deviation correcting capacity value of the target deviation correcting roller is obtained.
4. A method as claimed in claim 3, characterized in that the correction factor for the self-deflection of the furnace roller is in accordance with the formula k (k ═ k)R-total-κR-TL)/(Rtotal-RTL)*(W-RTL)-κR-TLDetermining; wherein,
the kappaR-totalWhen the width of the strip steel is consistent with the width of the working surface of the furnace roller, the self-correction coefficient of the furnace roller is kappaR-TLWhen the width of the strip steel is equal to the length of the furnace roller platform, the self-correcting coefficient of the furnace roller is obtained; the R istotalIs the length of the working surface of the furnace roller, RTLThe furnace roller platform is long, and W is the width of the strip steel.
5. The method of claim 1, wherein the method further comprises: and acquiring the actual offset X of the strip steel, judging whether the actual offset X is more than or equal to 0.5X delta X, and if so, controlling the furnace area speed to be reduced to the lowest operation speed.
6. The utility model provides a device for avoid belted steel off tracking which characterized in that, the device includes:
the first acquisition unit is used for acquiring the maximum width of a furnace wall and the width of strip steel in the vertical annealing furnace;
the first determining unit is used for determining the offset delta X of the steel strip rubbing the furnace wall according to the maximum width of the furnace wall and the width of the steel strip;
the second acquisition unit is used for determining the target deviation correcting roller and the first deviation correcting roller which is closest to the target deviation correcting roller;
acquiring the number of furnace rollers between the target deviation correcting roller and the first deviation correcting roller and the running distance of the strip steel between the target deviation correcting roller and the first deviation correcting roller;
a second determining unit, configured to determine, according to the number of furnace rollers, the running distance, the maximum deviation angle of the target deviation correcting roller, the maximum deviation correcting capability value, and the deviation correcting amount of the target deviation correcting roller to the strip steel, the maximum deviation Δ X of the strip steel at the target deviation correcting rolleract；
A control unit for judging the Δ XactWhether or not greater than said Δ X, if said Δ XactIf the temperature is larger than the delta X, the product specification and the annealing temperature of the strip steel are obtained; determining the lowest running speed of the steel grade according to the product specification and the annealing temperature of the strip steel; and controlling the furnace zone speed to be reduced to the lowest operation speed.
7. The apparatus of claim 6, wherein the first determining unit is specifically configured to:
according to the formula Δ X ═ W1-W)/2, determining the offset delta X of the steel strip rubbing against the furnace wall; wherein, the W1The maximum width of the furnace wall is W, and the width of the strip steel is W.
8. The apparatus of claim 6, wherein the second determining unit is specifically configured to:
according to the formulaDetermining the maximum deviation delta X of the strip steel at the target deviation correcting rolleract(ii) a Wherein,
k is a correction coefficient of the furnace roller for self-correction, andthe running distance is set, n is the number of the furnace rollers, gamma is the deviation correction amount of the target deviation correction roller to the strip steel, and α is the maximum deviation correction amount of the target deviation correction rollerDeflection angle; said Δ XmaxAnd the maximum deviation correcting capacity value of the target deviation correcting roller is obtained.
9. The apparatus of claim 8, wherein the correction factor for the self-aligning of the furnace roller is in accordance with the formula k (k ═ kR-total-κR-TL)/(Rtotal-RTL)*(W-RTL)-κR-TLDetermining; wherein,
the kappaR-totalWhen the width of the strip steel is consistent with the width of the working surface of the furnace roller, the self-correction coefficient of the furnace roller is kappaR-TLWhen the width of the strip steel is equal to the length of the furnace roller platform, the self-correcting coefficient of the furnace roller is obtained; the R istotalIs the length of the working surface of the furnace roller, RTLThe furnace roller platform is long, and W is the width of the strip steel.
10. The apparatus of claim 6, wherein the second obtaining unit is further configured to: acquiring the actual offset X of the strip steel;
the control unit is further configured to: and judging whether the actual offset meets the condition that X is more than or equal to 0.5X delta X, and if so, controlling the furnace zone speed to be reduced to the lowest operation speed.
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