CN1734378B - Material temperature system for continuous strip material treatment production line - Google Patents
Material temperature system for continuous strip material treatment production line Download PDFInfo
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- CN1734378B CN1734378B CN 200410056743 CN200410056743A CN1734378B CN 1734378 B CN1734378 B CN 1734378B CN 200410056743 CN200410056743 CN 200410056743 CN 200410056743 A CN200410056743 A CN 200410056743A CN 1734378 B CN1734378 B CN 1734378B
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Abstract
The invention provides a control system of continuous belt material disposal production line by correct material temperature control improvement when the band speed varies, adapting material temperature control system1 continuous belt material disposal2, which comprises the following parts: first heater12 controlling rotary speed to provide blowers21 with heating air through inverter 24, second heater 13 set in the induction heating device31, band S speed sensor33, adjustment supply induction heating device31, power adjuster32 and computer controller23. The band S material temperature of the first heating 12 output which is controlled by the 23 provides and adjusts the second heating13 output temperature as goal temperature to induction heating device31 power.
Description
Invention field
The present invention relates to adopt simultaneously the material temperature control system in the continuous band process for producing line of the heating arrangement that do not utilize induction heating and induction heating apparatus.
Background technology
Always, adopt simultaneously that not utilize the heating arrangement of induction heating and the continuous band process for producing line of induction heating apparatus be well-known (for example with reference to patent documentation 1,2).
[patent documentation 1] spy opens flat 6-114330 communique
[patent documentation 2] spy opens flat 10-180181 communique
Disclosed the continuous coating process of the band in a kind of continous way paint line in the above-mentioned patent documentation 1, be provided with in this paint line the band low-temperature heat behind the coating composition to the temperature required Fast Heating district that preheats district, heat preservation zone and above-mentioned band is heated rapidly to higher temperature required usefulness load coil with far infrared heater.
Disclose the sintering method of the application band in a kind of continuous paint line in the above-mentioned patent documentation 2, after the band after this method utilizes induction heating with coating composition is heated rapidly to required temperature range, continued in the hot gas sintering stove, to carry out sintering processes.
Above-mentioned document 1 described method only is applicable to the stable case that band can transmit with certain speed, and the heat treated of relevant band the when transfer rate in the operation that often occurs in the reality is changed is not a bit touched in the above-mentioned patent documentation.When above-mentioned transfer rate changes,, cause the intensification ability generation difference of the band in the transitional period to because the difference of the response speed of each heating arrangement.Promptly, the situation slower with the response speed of the far infrared heater of above-mentioned preheating zone is opposite, the response speed of the load coil in above-mentioned Fast Heating district is very fast, transitional period when above-mentioned transfer rate changes, each heating arrangement produces different results to the intensification ability of band, what have is fast, and what have is slow.Therefore, when each heating arrangement was implemented the control of heating efficiency independently, the amplitude of fluctuation that produces last material temperature strengthened, makes the product quality amount of band to worsen such problem.And, intensity of variation according to above-mentioned transfer rate, the situation that a certain heating arrangement can not adapt to its variation fully can take place, at this moment as also various heating arrangements are implemented independently the control of heating efficiency, then cause the such problem of product quality deterioration with above-mentioned similarly the existence.
For above-mentioned patent documentation 2 described methods, this method also only is applicable to the situation that transfer rate is constant, and the situation when inapplicable transfer rate changes produces problem same as described above.
The present invention is exactly will be to eliminate this problem always as problem, the material temperature control system in also applicable when providing the band transfer rate to change, as can to suppress final material temperature change, the continuous band process for producing line that improves the quality of products.
Summary of the invention
For solving above-mentioned problem, the 1st its formation of invention, comprise the 1st heating furnace that has the heating source of regulating furnace atmosphere temperature and wind speed, inside is provided with the 2nd heating furnace of induction heating apparatus, detect the continuous transfer rate that transmits and reach by described the 1st heating furnace the band of the 2nd heating furnace that links to each other therewith and also export the speed pickup of the rate signal of expression detection speed in the processing back of going ahead of the rest, regulate the regulator of the power of supplying with above-mentioned induction heating apparatus, and calculation control portion, the built-in table that writes above-mentioned every kind of necessary numerical value of steel grade heat Calculation of this calculation control portion, and write above-mentioned every kind of table of in advance handling the necessary numerical value of heat Calculation, when the band processing operation, extract steel grade with the above-mentioned band of importing in advance, and the above-mentioned various numerical value of treatment types correspondence in advance, and from the described table of above-mentioned every kind of generation, obtain the target temperature of described band of the export department of described the 2nd heating furnace, thickness of slab and plate are wide, or when the band processing operation, making in advance, input comprises this target temperature, thickness of slab and plate are wide, the various numerical value and the described rate signal that obtain according to described extraction, calculate the essential output of described heating source, controlling the go forward side by side Xingqi output of described heating source according to this result of calculation regulates, simultaneously, calculate the prediction and calculation of material temperature of the described band of described the 1st furnace outlet portion, result according to described various numerical value and described rate signal and described prediction and calculation, the supply power that calculating is essential to above-mentioned induction heating apparatus, according to this result of calculation, control described regulator, make by described regulator and export described essential supply power.
The 2nd its formation of invention, except the formation of the 1st invention, described calculation control portion is in described essential supply power calculates, near in the middle of employing becomes in described the 2nd heating furnace that described band in described the 2nd heating furnace enters described the 2nd heating furnace average material temperature constantly described band enters described the 2nd heating furnace material temperature constantly, as the value according to the result of described prediction and calculation.
Description of drawings
Fig. 1 illustrates the skeleton diagram of the continuous band paint line that adopts the relevant material temperature control system of the present invention.
The constitutional diagram that the wind speed of the 1st heating furnace that Fig. 2 illustrates transfer rate in the continuous band paint line shown in Figure 1 when changing, the supply power of the 2nd heating furnace, material temperature etc. change separately.
Label declaration
1 material temperature control system, 2 continuous band paint lines
11 handling part 12 the 1st heating furnaces in advance
13 the 2nd heating furnaces 21 add hot-air and supply with fan blower
23 calculation control portions, 24 inverters
25 power supplys, 31 induction heating apparatuses
32 regulators, 33 speed pickups
S band V transfer rate
Embodiment
Example of the present invention below is described with reference to the accompanying drawings.
Fig. 1 illustrates an example of the continuous band process for producing line that adopts the relevant material temperature control system 1 of the present invention and promptly is with thread paint line 2 continuously.In this continuous band paint line 2, after the handling part 11 the 1st heating furnace 12 is set in advance, the 2nd heating furnace 13 is set thereafter again what the band S to continuous transmission applied that application handles.
The 1st heating furnace 12 is connected with from what an example of heating source added promptly that hot-air supplies with that fan blower 21 extends and adds hot-air supply passageway 22.This drive motor 21A that adds hot-air supply fan blower 21 carries out rotating speed control by calculation control portion 23 by inverter 24 simultaneously by inverter 24 supply powers of power supply 25 by being connected in calculation control portion 23.And, add hot-air by adjusting and supply with the air quantity that adds hot-air that fan blower 21 is supplied with, the wind speed that blows to band S is changed, control the temperature of band S and promptly carry out the material temperature control.
The 1st heating furnace 13 inside are provided with induction heating apparatus 31 as heating source.This induction heating apparatus 31 carries out supply power control by calculation control portion 23 by regulator 32 simultaneously by regulator 32 supply powers of power supply 25 by being connected in calculation control portion 23.And the power by regulator 32 controls are supplied with induction heating apparatus 31 changes the strength of vortex that produces among the band S, thereby implements the control of material temperature.
In the calculation control portion 23, importing the steel grade of band S, the kind of in advance handling in advance when the band processing operation, be coating code etc. here, is the rate signal of speed pickup 33 input expression detection speeds of the transfer rate V of band S from the continuous detecting linear velocity in the band processing operation simultaneously.In this external calculation control portion 23, generate the table of the required numerical value of heat Calculation such as the specific heat that writes every kind of steel grade, proportion in advance and write the table of the required numerical value of the heat Calculation such as coating thickness, specific heat, evaporation latent heat of every kind of coating code.And, target temperature, thickness of slab and plate for the band S of the export department of the temperature of the band S of the inlet portion of the 1st heating furnace 12 and the 2nd heating furnace 13 are wide, or from the described form that above-mentioned each class is generated, obtain, or obtain in the numerical value of importing in advance during by the band processing operation.
Specifically, the heat dissipation capacity Q of the 1st heating furnace 12
OUTAnd caloric receptivity Q
INCan be expressed as follows formula.
Q
OUT＝C·LS/60·(T
1OUT-T
1IN) (1)
Q
IN＝Q
C+Q
R (2)
Q
C＝K
1·f
1(T
1IN，T
1OUT，T
f)·V
f α (3)
[0033]Q
R＝K
2·f
2(T
1IN，T
1OUT，T
f) (4)
[0034]In the formula, C: the thermal capacity of the per unit length of band (kJ/m/ ° of k)
LS: transfer rate (linear velocity) (m/min)
T
1IN: the material temperature of the 1st heating furnace inlet portion (℃)
T
1OUT: the material temperature of the 1st furnace outlet portion (℃)
Q
C: convection heat transfer' heat-transfer by convection amount (kW)
Q
R: radiant heat transfer amount (kW)
T
f: add hot air temperature (℃)
K
1The coefficient convective heat-transfer coefficient of furnace superintendent decision (wide) by stove shape, plate
K
2: the coefficient radiation heat transfer coefficient of furnace superintendent decision (wide) by radiance, plate
V
f: wind speed (m/sec)
α: wind speed is intervened coefficient
f
1(T
1IN, T
1OUT, T
f) temperature funtion 1
f
2(T
1IN, T
1OUT, T
f) temperature funtion 2
Then, in the calculation control portion 23, with T
1IN, T
1OUT, T
f, Ls, C, K
1, K
2And α calculates Q as known value with above formula
IN=Q
OUTV
f(essential wind speed) is for realizing this V
f, pass through the rotating speed of inverter 24 controlling and driving with motor 21A by calculation control portion 23.
To band heating load Pn (kW) in the 2nd heating furnace 13 and supply power Po (kW), can be represented by the formula again.
P
n＝C·LS·(T
2OUT-T
2IN)/60 (5)
P
o＝(1/η)·(P
n+P
a) (6)
In the formula, C: the thermal capacity of the per unit length of band (kJ/m/ ° of k) (as above-mentioned)
LS: transfer rate (linear velocity) is (as above-mentioned) (m/min)
T
2IN: the material temperature of the 2nd heating furnace inlet portion (℃)
T
2OUT: the material temperature of the 2nd furnace outlet portion (℃)
η: efficient
Pa: convection current radiation loss (kW)
Then, carry out the calculating of above-mentioned formula in the calculation control portion 23, by the value that formula (6) is calculated, the power that calculation control portion 23 regulates the supply of induction heating apparatus 31 by regulator 32.
Speed pickup 33 detected transfer rates are input to calculation control portion 23 constantly, for example shown in Fig. 2 (I), when transfer rate changes to 40m/min from 80m/min, for the heat dissipation capacity Q of the 1st heating furnace 12
OUTThe corresponding caloric receptivity Q that makes
INReduce, in the roughly the same moment, calculation control portion 23 begins to reduce the rotating speed of drive motor 21A, and beginning is for example from the wind speed deceleration of 30m/sec originally as shown in Fig. 2 (II).It is to follow transfer rate to change and change that wind speed shown in the middle dot-and-dash line A of Fig. 2 (II) does not lag behind in time, this is desirable, but in fact, slow down like that lentamente so become shown in solid line among Fig. 2 (II) owing to make the speed of the rotation speed change of drive motor 21A have limit.Therefore illustrating with dash area as among Fig. 2 (II), generation is to the too much state of the heat supplied of band S.The result shown in Fig. 2 (III), the material temperature of the export department of the 1st heating furnace 12, though for example remained on 100 ℃ originally, from the variation zero hour of transfer rate, certain section time Δ t only lags behind
1, just begin to rise.
Subsequently, wind speed reaches the 12m/min corresponding with transfer rate 40m/min, and remains on this state, corresponding therewith, spend the some time, be in since the material temperature of the export department of the 1st heating furnace 12 of 100 ℃ of rising trends and also descend, fallen back to 100 ℃ state originally.
Variation along with above-mentioned transfer rate, the supply power that calculation control portion 23 also regulates induction heating apparatus 31 by regulator 32, this supply power is shown in Fig. 2 (IV), with the variation of transfer rate accordingly, do not have time lag ground in fact and change to the 255kW of transfer rate 40m/min correspondence from for example originally the 500kW of transfer rate 80m/min correspondence.If the material temperature of the inlet portion of the 2nd heating furnace 13 i.e. material temperature of the export department of the 1st heating furnace 12 remains on 100 ℃, then change by the supply power that makes induction heating apparatus 31, remain on 255kW, the material temperature of the export department of the 2nd heating furnace 13 should remain on for example 230 ℃ of the target temperatures of setting shown in Fig. 2 (V).; as mentioned above because the i.e. cambic rising of material temperature generation of the 2nd heating furnace 13 inlet portions of the material temperature of the 1st heating furnace 12 export departments; so when with the supply power former state when remaining on 255kW; such shown in dot-and-dash line B among Fig. 2 (V); the material temperature of the 2nd heating furnace 13 export departments is subjected to the influence of above-mentioned cambic material temperature rising and rises transiently, and temperature significantly departs from objectives.
Yet, adopt in this continuous band paint line 2 of the relevant material temperature control system 1 of the present invention, constantly from speed pickup 33 input speed signals, and import the necessary numerical value of heat Calculation in advance, and then be the prediction and calculation of the material temperature shown in Fig. 2 (III) by the material temperature that the calculation control portion 23 that generates the necessary form of heat Calculation carries out the 2nd heating furnace 13 inlet portions unceasingly, result according to this prediction and calculation is calculated carries out the calculating of above-mentioned supply power.Then according to the result that calculates of this calculating, the supply power of regulating induction heating apparatus 31 by regulator 32.That is, illustrate with solid line, after supply power changes to 255kW, supply power is descended transiently, to suppress in (V) with the temperature rising shown in the dot-and-dash line B as Fig. 2 (IV).
About to the 2nd heating furnace 13 internal induction heating arrangements 31 necessary supply powers, calculating by calculation control portion 23, material temperature with the 2nd heating furnace 13 export departments is that target temperature roughly determines above-mentioned band heating power Pn with the difference of the material temperature of the 2nd heating furnace 13 inlet portions with being directly proportional, in transfer rate is a timing, even adopt the material temperature of this inlet portion, also no problem in the material temperature control.But when transfer rate changed, the material temperature of the inlet portion of the 2nd heating furnace 13 of prediction and calculation may not reflect that the each several part of the band S in the 2nd heating furnace 13 is positioned at the material temperature in the moment of the 2nd heating furnace 13 inlet portions.Therefore, among the present invention the each several part of the band S in the 2nd heating furnace 13 is positioned at the 2nd heating furnace 13 inlet portions the moment average material temperature for example near the band S the centre of the 2nd heating furnace 13 be positioned at the material temperature in the moment of the 2nd heating furnace 13 inlet portions, the material temperature of regarding above-mentioned inlet portion as, to replace the material temperature in the above-mentioned inlet portion, carry out the length of drilling of above-mentioned essential supply power, according to this result of calculation, to induction heating apparatus 31 supply powers.As a result, as shown in Fig. 2 (IV), a time Δ t more lags behind when rising than the material temperature of the export department of the 2nd heating furnace 13 is transitional
2, the transitionality of just carrying out supply power reduces, and so, shown in figure (V), the material temperature of above-mentioned export department changed is suppressed to more by a small margin.Specifically, on the continuous band paint line relevant with household appliances, the tolerance of final material temperature and target temperature is ± 5 ℃ sometimes, and above-mentioned continuous band paint line 2 meets this requirement.
Again, enumerated various concrete numerical value in the narration relevant with Fig. 2, but this is the example for this explanation of easy to understand usefulness fully, self-evident, the present invention is not limited to these numerical value.
Again, handle being not limited to the application processing in advance, also comprise other for example situations of annealing in process.
From the above description can be clear and definite, according to the 1st invention, then its formation possesses: the 1st heating furnace that has the heating source of regulating furnace atmosphere temperature and wind speed, inside is provided with the 2nd heating furnace of induction heating apparatus, detection is transmitted continuously and is being handled the back by the transfer rate of the band of described the 1st heating furnace and the 2nd heating furnace that links to each other therewith and the speed pickup that the rate signal of detection speed is represented in output in advance, regulate the regulator of the power of supplying with above-mentioned induction heating apparatus, and calculation control portion, the built-in table that writes above-mentioned every kind of necessary numerical value of steel grade heat Calculation of this calculation control portion, and write above-mentioned every kind of table of in advance handling the necessary numerical value of heat Calculation, when the band processing operation, extract steel grade with the above-mentioned band of importing in advance, and the above-mentioned various numerical value of treatment types correspondence in advance, and from the described table of above-mentioned every kind of generation, obtain the target temperature of described band of the export department of described the 2nd heating furnace, thickness of slab and plate are wide, or when the band processing operation, making in advance, input comprises this target temperature, thickness of slab and plate are wide, the various numerical value and the described rate signal that obtain according to described extraction, calculate the essential output of described heating source, control described heating source and do its output adjusting according to this result of calculation, simultaneously, calculate the prediction and calculation of material temperature of the described band of described the 1st furnace outlet portion, result according to described various numerical value and described rate signal and described prediction and calculation, the supply power that calculating is essential to above-mentioned induction heating apparatus, according to this result of calculation, control described regulator, make by described regulator and export described essential supply power.
According to the 2nd invention, then it constitutes except after the 1st formation of inventing, described calculation control portion is in described essential supply power calculates, near in the middle of employing becomes in described the 2nd heating furnace that described band in described the 2nd heating furnace enters described the 2nd heating furnace average material temperature constantly described band enters described the 2nd heating furnace material temperature constantly, as the value according to the result of described prediction and calculation.
Therefore, the material temperature change of above-mentioned export department can be suppressed to bottom line, have the sort of effect of the product quality of can further improve.
Claims (2)
1. the material temperature control system in the continuous band process for producing line is characterized in that, comprises
Have the heating source of regulating furnace atmosphere temperature and wind speed the 1st heating furnace,
Inside be provided with induction heating apparatus the 2nd heating furnace,
Detect and to transmit continuously and carrying out handling the transfer rate of back by the band of described the 1st heating furnace and the 2nd heating furnace that links to each other with described the 1st heating furnace in advance, and exporting the speed pickup of the rate signal of representing detection speed of certain kind,
Regulate to supply with above-mentioned induction heating apparatus power regulator and
Calculation control portion, described calculation control portion generates the target temperature of the described band that writes the export department that comprises described the 2nd heating furnace in advance, the table of the necessary numerical value of heat Calculation of the steel grade of every kind of above-mentioned band that thickness of slab and plate are wide, and write the table of every kind of above-mentioned necessary numerical value of heat Calculation of in advance handling, when the band processing operation, extract steel grade with the above-mentioned band of importing in advance, and the various numerical value of the above-mentioned kind correspondence of in advance handling, and from the described table of above-mentioned every kind of generation, obtain the target temperature of described band of the export department of described the 2nd heating furnace, thickness of slab and plate are wide, perhaps, making in advance, input comprises described target temperature, thickness of slab and plate are wide, the various numerical value and the described rate signal that obtain according to described extraction, calculating makes the caloric receptivity of described the 1st heating furnace and the essential wind speed of the described heating source that heat dissipation capacity equates, controlling the go forward side by side Xingqi output of described heating source according to this result of calculation regulates, simultaneously, calculate the prediction and calculation of material temperature of the described band of described the 1st furnace outlet portion, result according to described various numerical value and described rate signal and described prediction and calculation, calculate the supply power essential according to following formula to above-mentioned induction heating apparatus
P
n＝C·LS·(T
2OUT-T
2IN)/60
P
o＝(1/η)·(P
n+P
a)
According to this result of calculation, control described regulator, make by described regulator and export described essential supply power,
In the above-mentioned formula, η represents efficient,
Pn represents the band heating load in the 2nd heating furnace, and unit is kW,
Po represents the supply power in the 2nd heating furnace, and unit is kW,
Pa represents the convection current radiation loss, and unit is kW,
C represents the thermal capacity of the per unit length of band, and unit is kJ/m/ ° of k,
LS represents transfer rate, and unit is m/min,
T
2INThe material temperature of representing the 2nd heating furnace inlet portion, unit is ℃,
T
2OUTThe material temperature of representing the 2nd furnace outlet portion, unit is ℃.
2. the material temperature control system in the continuous band process for producing line as claimed in claim 1 is characterized in that,
Described calculation control portion is in described essential supply power calculates, near in the middle of employing becomes in described the 2nd heating furnace that described band in described the 2nd heating furnace enters described the 2nd heating furnace average material temperature constantly described band enters described the 2nd heating furnace material temperature constantly, as the value according to the result of described prediction and calculation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410056743 CN1734378B (en) | 2004-08-13 | 2004-08-13 | Material temperature system for continuous strip material treatment production line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410056743 CN1734378B (en) | 2004-08-13 | 2004-08-13 | Material temperature system for continuous strip material treatment production line |
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| Publication Number | Publication Date |
|---|---|
| CN1734378A CN1734378A (en) | 2006-02-15 |
| CN1734378B true CN1734378B (en) | 2010-09-15 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101519735B (en) * | 2008-02-25 | 2010-11-24 | 宝山钢铁股份有限公司 | Method for controlling strip-steel head and tail temperature |
| JP2010163634A (en) * | 2009-01-13 | 2010-07-29 | Chugai Ro Co Ltd | Apparatus for treating strip material |
| ITUA20162328A1 (en) * | 2016-04-05 | 2017-10-05 | Sat Surface Aluminium Tech S R L | PLANT AND PROCEDURE FOR PAINTING PROFILES |
| CN105716382A (en) * | 2016-04-15 | 2016-06-29 | 河南省西工机电设备有限公司 | Brushless resistance heating steel strip belt dryer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1205920A (en) * | 1996-09-16 | 1999-01-27 | 曼内斯曼股份公司 | Model supported method for controlling cooling of rolled piece during rolling and cooling |
| CN1506475A (en) * | 2002-12-13 | 2004-06-23 | 上海纯青实业有限公司 | Making process of alloy for magnetic core of transformer |
-
2004
- 2004-08-13 CN CN 200410056743 patent/CN1734378B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1205920A (en) * | 1996-09-16 | 1999-01-27 | 曼内斯曼股份公司 | Model supported method for controlling cooling of rolled piece during rolling and cooling |
| CN1506475A (en) * | 2002-12-13 | 2004-06-23 | 上海纯青实业有限公司 | Making process of alloy for magnetic core of transformer |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平9-128063A 1997.05.16 |
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