CN104028561B - Method for guaranteeing final-cooling temperature precision for steel plates - Google Patents
Method for guaranteeing final-cooling temperature precision for steel plates Download PDFInfo
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- CN104028561B CN104028561B CN201410271654.8A CN201410271654A CN104028561B CN 104028561 B CN104028561 B CN 104028561B CN 201410271654 A CN201410271654 A CN 201410271654A CN 104028561 B CN104028561 B CN 104028561B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000010959 steel Substances 0.000 title claims abstract description 38
- 238000001816 cooling Methods 0.000 title claims abstract description 27
- 238000007689 inspection Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
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- Control Of Heat Treatment Processes (AREA)
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Abstract
The invention discloses a method for guaranteeing final-cooling temperature precision for steel plates. The method includes the steps: a pyrometer A and a pyrometer B of the same model and having same parameters are mounted behind a cooling device in a direction parallel to the moving direction of a steel plate; a temperature that the pyrometer A measures is used as control application of an automatic control system, and a temperature that the pyrometer B measures is recorded in a database of the automatic control system; a difference between averages of temperatures that the pyrometers A and B measure in initial two online days is used as a standard difference; the pyrometer B is subjected to calibration check every 9-11 days so as to ensure accuracy of the temperature that the pyrometer B measures; the averages of the temperatures that the pyrometers A and B measure and those recorded in the control system are compared every two days, the temperature that the pyrometer A measures is compensated when changes of the difference between the averages exceeds a set threshold as compared with the difference between the averages of the temperatures that are measured in the initial two online days, and the difference between the temperature that is finally transmitted to the automatic control system by the pyrometer A and the temperature that is finally transmitted to the automatic control system by the pyrometer B is equalized to the standard difference.
Description
Technical field
The invention belongs to hot rolling technique field, particularly to a kind of method ensureing steel plate final cooling temperature precision.
Background technology
Along with the development of hot rolling technique, the most a lot of steel grades are when producing, in addition to using controlled rolling technology,
Also use Controlled cooling process, carry out forcing cooling to rolling rear steel plate, it is therefore an objective to improve rolling of steel plate rear cold
But speed, reduces phase transition temperature, reaches crystal grain thinning, improve the purpose of steel plate structure property.Cold temperature eventually
Degree is to control one of most important parameter in cold technique, and final cooling temperature directly determines the phase transition temperature of steel plate, right
Steel plate finally organize important.In actual production, owing to being used for detecting temperature after steel plate has cooled down
The pyrometer zero point of degree it occur frequently that shift phenomenon, makes the temperature of detection be forbidden, and this phenomenon be difficult to by
Site operation personnel finds, owing to detection temperature is forbidden, the performance of steel plate fluctuates, and even occurs big
Criticize the mechanical performance situation beyond standard-required, the stability of product quality is had a negative impact.
Summary of the invention
Technical problem solved by the invention is to provide a kind of method ensureing steel plate final cooling temperature precision, energy
Final cooling temperature accuracy for automatic controlling system is effectively ensured on production line.
Technical scheme is as follows:
A kind of method ensureing steel plate final cooling temperature precision, including:
Be parallel to after chiller the steel plate direction of motion install two same models pyrometer, two
Pyrometer is designated as pyrometer A and pyrometer B respectively；
Pyrometer A and pyrometer B to arrange parameter identical, using pyrometer A measured temperature value as from
The control application of autocontrol system, pyrometer B measured temperature record is at the lane database of automatic control system；
Using the difference of pyrometer A and initial two days measured temperature meansigma methodss of reaching the standard grade of pyrometer B as standard deviation；
Every 9～11 days, pyrometer B is carried out calibration check, to ensure the standard of pyrometer B measured temperature
Really property；
Every three days the meansigma methods of the pyrometer A recorded in control system with the temperature of pyrometer B is carried out
Relatively, when the difference of more initial two days measured temperature meansigma methodss of reaching the standard grade of its difference varies more than setting threshold value,
Pyrometer A measured temperature is compensated, makes temperature value and the pyrometer of the final incoming system of pyrometer A
The difference of B is identical with standard deviation.
Further: pyrometer A and pyrometer B is on same straight line, it is spaced 0.4～0.6 meter, to protect
The steel plate position that card is surveyed is identical.
Further: putting down the temperature of pyrometer A and the pyrometer B recorded in control system every three days
Average compares, it is therefore an objective to whether the zero point of inspection pyrometer A drifts about；When pyrometer A has drift
When moving phenomenon, pyrometer A measured temperature is compensated, makes the temperature of the incoming control system of pyrometer A
It is worth identical with standard deviation with the difference of pyrometer B measured temperature, to ensure the use in incoming control system
The accuracy of the temperature controlled is calculated in control system.
Further: setting threshold value as 5 DEG C, standard deviation is 11 DEG C；Every 10 days, pyrometer B is entered
Row calibration check, to ensure the accuracy of pyrometer B measured temperature；To remember in control system every three days
The pyrometer A of record compares with the meansigma methods of the temperature of pyrometer B, when its difference more initial two is in the sky
When the difference of line measured temperature meansigma methods varies more than 5 DEG C, i.e. the meansigma methods of pyrometer A-pyrometer B
Meansigma methods more than 16 DEG C or less than 6 DEG C time, pyrometer A measured temperature is compensated, makes pyrometer
The temperature value of the incoming system of A and the difference of pyrometer B are 11 DEG C.
Compared with prior art, the technology of the present invention effect includes:
1, the final cooling temperature that the present invention can be effectively ensured on production line for automatic controlling system is accurate
Property.And the method is simple, it is simple to promote.Present invention particularly suitable for use in the heat with controlled cooling device
Roll on strip steel or Heavy Plate Rolling Line.
2, producing 800,000 tons of need with 1 year and carry out rolling the steel plate of rear rapid cooling, properties percent of pass of steel plate carries
High by 5%, heat treatment is saved 1 ton of performance and is not conformed to steel plate increase cost 250 yuan calculating, within 1 year, can increase warp
Ji benefit 1,000 ten thousand yuan.The method reduce heat treatment redemption performance and do not conform to the amount of steel plate, decrease fuel
Consumption, be made that contribution to improving environment, there is positive social benefit.
Detailed description of the invention
Specifically comprising the following steps that of the method for guarantee steel plate final cooling temperature precision
Step 1: be parallel to the steel plate direction of motion after chiller and install the high temperature of two same models
Meter；
The two pyrometer is on same straight line, front and back places, and is spaced 0.4～0.6 meter, to ensure
The steel plate position surveyed is identical.For convenience of the most described below, the two pyrometer is designated as respectively pyrometer A and
Pyrometer B.
Step 2: it is identical that two pyrometers all arrange parameter, using pyrometer A measured temperature value as
Automatic controlling system is applied；Pyrometer B measured temperature still records at automatic control system lane database,
But it is not involved in automatic system and controls application.By pyrometer A and initial two days measured temperatures of reaching the standard grade of pyrometer B
The difference of meansigma methods is good as standard deviation record.
During pyrometer uses on line, often there is null offset phenomenon, be difficult to find, although control
System processed display final cooling temperature does not has anything to change, but actual final cooling temperature is the most higher or on the low side more,
Frequently resulting in steel plate mechanical performance to occur fluctuating by a relatively large margin, even occur being above standard in batches the feelings required
Condition.There is certain difference, therefore by initial two days two high temperature in the temperature surveyed due to two pyrometers
Meter measured temperature meansigma methods difference record is good, using this difference as reference mark.
Step 3: pyrometer B is carried out calibration check every 9～11 days, to ensure that pyrometer B is surveyed
The accuracy of temperature.
Step 4: putting down the temperature of pyrometer A and the pyrometer B recorded in control system every three days
Average compares, and sets when the difference of more initial two days measured temperature meansigma methodss of reaching the standard grade of its difference varies more than
(in this preferred embodiment, set threshold value as 5 DEG C) when determining threshold value, pyrometer A measured temperature is carried out
Compensating, the temperature value making the final incoming system of pyrometer A is identical with standard deviation with the difference of pyrometer B.
Every three days the meansigma methods of the pyrometer A recorded in control system with the temperature of pyrometer B is carried out
Relatively, it is therefore an objective to whether the zero point of inspection pyrometer A drifts about, when being found to have drift phenomenon, right
Pyrometer A measured temperature compensates, and makes temperature value and the high temperature of the final incoming control system of pyrometer A
The difference (identical with standard deviation) the same as before of meter B measured temperature, to ensure incoming control system
In calculate, for control system, the accuracy of temperature controlled.
In actual production, control system can be controlled according to the temperature value that pyrometer A is incoming, when this
When the difference of temperature and the target final cooling temperature being previously set exceedes certain limit, control system can be by changing
Turn cold the parameters such as the cooling water inflow of radiator cooler or steel plate cool time in chiller to adjust steel plate
Final cooling temperature, finally makes the final cooling temperature of the surveyed steel plate of pyrometer A and target setting final cooling temperature difference exist
In the range of control system allows；So the accuracy of pyrometer A surveyed steel plate final cooling temperature is for controlling
The control of system is most important.
Below in conjunction with embodiment, technical solution of the present invention is further described.
Embodiment 1
On 4.1 meters of generous printed lines after ACC section cooling, the ground of distance cooling facility for laminar flow 10 meters
Side, is parallel to the steel plate direction of motion and installs the pyrometer of two same models, and the two pyrometer is in same
On one straight line, front and back place, be spaced 0.5 meter, identical to ensure the steel plate position surveyed, it is designated as high temperature
Meter A and pyrometer B.It is identical that two pyrometers all arrange parameter, is made by pyrometer A measured temperature
Apply for automatic controlling system；Pyrometer B measured temperature still records automatic control system data base
In, but be not involved in automatic system and control application.Initial with pyrometer B for pyrometer A two days are reached the standard grade and is surveyed
The difference of temperature averages is good as standard deviation record, and standard deviation is 11 DEG C, i.e. pyrometer A's is flat
The meansigma methods of average-pyrometer B is 11 DEG C.Every 10 days, pyrometer B is carried out calibration check, with
Ensure the accuracy of pyrometer B measured temperature.Every three days by the pyrometer A that records in control system with
The meansigma methods of the temperature of pyrometer B compares, when more initial two days measured temperatures of reaching the standard grade of its difference are average
When the difference of value varies more than 5 DEG C, i.e. the meansigma methods of the meansigma methods of pyrometer A-pyrometer B is more than 16
DEG C or less than 6 DEG C time, pyrometer A measured temperature is compensated, makes the final incoming system of pyrometer A
Temperature value identical with standard deviation with the difference of pyrometer B, be 11 DEG C.According to said method, give birth to over one year
The steel plate stable mechanical performance produced, does not occur causing steel plate mechanical performance not conform to because final cooling temperature is abnormal
Phenomenon.
Claims (2)
1. the method ensureing steel plate final cooling temperature precision, including:
Be parallel to after chiller the steel plate direction of motion install two same models pyrometer, two
Pyrometer is designated as pyrometer A and pyrometer B respectively；Pyrometer A and pyrometer B is in same straight line
On, it is spaced 0.4～0.6 meter, identical to ensure the steel plate position surveyed；
Pyrometer A and pyrometer B to arrange parameter identical, using pyrometer A measured temperature value as from
The control application of autocontrol system, pyrometer B measured temperature value record is the data base of automatic control system
In；Using the difference of pyrometer A and initial two days measured temperature meansigma methodss of reaching the standard grade of pyrometer B as standard deviation
Value, this standard deviation is 11 DEG C；
Every 9～11 days, pyrometer B is carried out calibration check, to ensure the standard of pyrometer B measured temperature
Really property；
Every three days the meansigma methods of the pyrometer A recorded in control system with pyrometer B measured temperature is entered
Row compares, when the difference of more initial two days measured temperature meansigma methodss of reaching the standard grade of its difference varies more than the threshold of setting
During value, this threshold value is 5 DEG C, i.e. the meansigma methods of pyrometer A measured temperature deducts the meansigma methods of pyrometer B
More than 16 DEG C or less than 6 DEG C time, pyrometer A measured temperature is compensated, makes pyrometer A finally pass
The difference of the temperature value and pyrometer B that enter system is standard deviation.
2. the method ensureing steel plate final cooling temperature precision as claimed in claim 1, it is characterised in that: every
Every two days, the meansigma methods of the pyrometer A recorded in control system with the temperature of pyrometer B is compared,
Purpose is whether the zero point of inspection pyrometer A drifts about；When pyrometer A has drift phenomenon, to height
Temperature meter A measured temperature compensates, and makes temperature value and the pyrometer B of the incoming control system of pyrometer A
The difference of measured temperature is identical with standard deviation, by ensure in incoming control system based on control system
Calculate the accuracy of the temperature controlled.
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| CN201410271654.8A CN104028561B (en) | 2014-06-18 | 2014-06-18 | Method for guaranteeing final-cooling temperature precision for steel plates |
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| CN201410271654.8A CN104028561B (en) | 2014-06-18 | 2014-06-18 | Method for guaranteeing final-cooling temperature precision for steel plates |
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| CN104028561B true CN104028561B (en) | 2017-01-11 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113083913B (en) * | 2021-03-31 | 2023-03-21 | 北京首钢股份有限公司 | Coiled strip steel temperature control method and device and laminar cooling system |
| CN114713646B (en) * | 2022-03-09 | 2024-07-30 | 首钢京唐钢铁联合有限责任公司 | Method and device for identifying abnormal state of steel rolling production line pyrometer |
| CN115931152B (en) * | 2022-12-08 | 2023-10-20 | 鞍钢股份有限公司 | Pyrometer signal optimization method, system and storage medium based on laminar flow control |
| CN116007790A (en) * | 2022-12-28 | 2023-04-25 | 浙江凌昇动力科技有限公司 | Calibration method, device and computer equipment of a vehicle-mounted temperature sensor |
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|---|---|---|---|---|
| CN101693257A (en) * | 2009-09-30 | 2010-04-14 | 唐山国丰钢铁有限公司 | Method for realizing continuous feedback control by duality of hot finishing outlet instruments |
| CN102225433A (en) * | 2011-03-30 | 2011-10-26 | 山西太钢不锈钢股份有限公司 | Method for measuring and calibrating surface temperature of steel plate |
| CN103502783A (en) * | 2010-12-30 | 2014-01-08 | 维易科仪器公司 | Methods and systems for in-situ pyrometer calibration |
| CN103834776A (en) * | 2014-02-28 | 2014-06-04 | 北京首钢股份有限公司 | Method for online calibration of fixed type pyrometers of continuous type annealing furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58110109A (en) * | 1981-12-23 | 1983-06-30 | Mitsubishi Electric Corp | Temperature controlling device for material to be rolled |
| KR100995600B1 (en) * | 2003-11-04 | 2010-11-22 | 주식회사 포스코 | Temperature Compensation Control Device and Method for Hot Rolled Steel Sheet Inserted into Mini Mill Finishing Mill |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101693257A (en) * | 2009-09-30 | 2010-04-14 | 唐山国丰钢铁有限公司 | Method for realizing continuous feedback control by duality of hot finishing outlet instruments |
| CN103502783A (en) * | 2010-12-30 | 2014-01-08 | 维易科仪器公司 | Methods and systems for in-situ pyrometer calibration |
| CN102225433A (en) * | 2011-03-30 | 2011-10-26 | 山西太钢不锈钢股份有限公司 | Method for measuring and calibrating surface temperature of steel plate |
| CN103834776A (en) * | 2014-02-28 | 2014-06-04 | 北京首钢股份有限公司 | Method for online calibration of fixed type pyrometers of continuous type annealing furnace |
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