CN100431726C - Strip steel reeling temperature controlling method and device - Google Patents
Strip steel reeling temperature controlling method and device Download PDFInfo
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- CN100431726C CN100431726C CNB2006101707462A CN200610170746A CN100431726C CN 100431726 C CN100431726 C CN 100431726C CN B2006101707462 A CNB2006101707462 A CN B2006101707462A CN 200610170746 A CN200610170746 A CN 200610170746A CN 100431726 C CN100431726 C CN 100431726C
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Abstract
The strip steel reeling temperature controlling method and device belongs to the field of strip steel reeling temperature controlling technology. The strip steel reeling temperature controlling device includes one cooling area comprising water spraying header pipe and one computerized control system, and features that three temperature measuring units are set along the strip steel moving direction in the cooling area to obtain the feed forward parameters for computerized control and the computerized control system compares the feed forward parameters with the set values for compensating and regulating the water spraying amount and the reeling speed so as to control the reeling temperature. The present invention can raise the reeling temperature controlling precision and raise the mechanical performance of the strip steel product.
Description
Technical field
The invention belongs to the control technology field of steel rolling coiling temperature, relate in particular to a kind of reeling temperature controlling method of hot-strip, and use this method and carry out the temperature controlled device of strip coiling.
Background technology
In the hot-strip production process, the coiling temperature of hot-strip is to the institutional framework and the mechanical performance important influence of hot-strip.Hot-strip enters before the coiling machine after leaving finishing mill, need cool off fast and accurately control hot-strip, with the strip coiling temperature of realizing ideal.
Currently used hot-strip cooling system is the water-cooling apparatus of upper layer flows collector and bottom spray header composition, the method of this device cooling is to utilize a plurality of points for measuring temperature to record different temperatures in the strip coiling, by simulation to the system cools curve, the spray rate and the injection flow rate of control upper layer flows collector and bottom spray header are finished whole cooling procedure.But existing strip coiling temperature-controlled process and device thereof exist, and the water spray cooling zone is long, point for measuring temperature too much, complex structure and the higher shortcoming of cost.
As on July 20th, 2005 disclosed Chinese patent application 200410021048.7 provide a kind of band steel cooling facility for laminar flow and control cooling means, this device mainly is made of the cooling zone that upper stream collector and following spray header are formed, limit portion is provided with side-blown mechanism, described cooling zone comprises cold section Z of a master and a fine cold-leg J, main cold section Z and fine cold-leg J form by the bottom spray header group of a plurality of upper layer flows collector groups and respective numbers, all be provided with a by-pass valve control on the every collector of main cold section Z upper header group, per two collectors of lower header group are provided with a by-pass valve control, on the fine cold-leg J, the lower header group all is by-pass valve control of a collector, it is characterized in that this cooling device by individual have separately cold section Z of master and the cooling zone of fine cold-leg J, be that preceding cooling zone A and back cooling zone B serial connection form, its version is: cold section Z+ fine cold-leg of main cold section Z+ fine cold-leg J+ master J.The control cooling means of this cooling device is calculated by setting by computer and feedback, feedforward are calculated and finished.The main process of control method is: carry out model according to the requirement of control mode and calculate, after calculating through the one-level model by the calculating of secondary laminar model, calculation process is set in the release of control cooling device again; The temperature measuring equipment everywhere of cooling zone of being placed in feeds back to the one-level model with actual temperature value, revises cooling scheme repeatedly, to guarantee the realization of setting value.
Though this cooling device can be realized the computer control of strip coiling temperature, but because the cooling zone is long, computer cooling control system complexity has increased the uncertainty of cooling factor on the contrary, point for measuring temperature is too much on the other hand, this has not only increased operation and has controlled cost, and has also increased the control difficulty accordingly.
Summary of the invention
The object of the present invention is to provide a kind of have main cold section and the cooling zone of fine cold-leg and the strip coiling temperature-controlled process and the device thereof of three points for measuring temperature, cooling zone and the accurate control method short by essence realize strip coiling point accuracy control over temperature, error is little, the accuracy height.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of strip coiling temperature-controlled process, comprise cooling zone and computer control system that the water spray collector is formed, it is characterized in that cooling zone traffic direction distribution main cold section and two cooling sections of fine cold-leg along the band steel, three place's temperature measuring equipments are set respectively in the cooling zone, in order to detect belt steel temperature, and as the preceding feedforward parameter of computer control system, computer control system compares preceding feedforward parameter and setting value and compensate, thus the coiling temperature of adjusting the injection flow rate of water spray collector and being with the coiling speed control band steel of steel.
The control procedure of described computer control system is: the computation model that carries out the cooling zone initial parameter according to required salband steel in the computer control system is set, and this initial parameter comprises the injection flow rate size of the water spray collector of main cold section and each cooling section of fine cold-leg in the cooling zone and the coiling speed of band steel; When cooling off, the band steel is measured the cooled temperature of temperature, medium temperature and accurate adjustment before the cooling successively by main cold section and fine cold-leg and by the temperature measuring equipment that is separately positioned on main cold section front end, main cold section and fine cold-leg junction, fine cold-leg end successively, this temperature value is as the preceding feedforward parameter of computer control system, compare and compensate with setting model then, adjust the coiling speed of the injection flow rate and the band steel of water spray collector simultaneously.
Described cooling zone is made up of upper layer flows collector and bottom spray header, and main cold section front end, cold section of master and fine cold-leg junction, fine cold-leg end are provided with temperature measuring equipment respectively.
Described cooling zone is made up of the bottom spray header of 17 groups of upper layer flows collectors and equivalent amount, described master comprises eight groups of upper layer flows collectors and bottom spray header for cold section, fine cold-leg is made up of other nine groups of upper layer flows collectors and bottom spray header, and the injection flow rate of upper layer flows collector and bottom spray header reduces successively along band steel traffic direction.
Adopt the strip coiling temperature control equipment of this strip coiling temperature-controlled process, comprise cooling zone and computer control system, described cooling zone is made up of upper layer flows collector and bottom spray header, it is characterized in that, the cooling zone is divided into main cold section and fine cold-leg, and main cold section front end, cold section of master and fine cold-leg junction, fine cold-leg end are provided with temperature measuring equipment respectively.
Further say, described cooling zone is made up of the bottom spray header of 17 groups of upper layer flows collectors and equivalent amount, described master comprises eight groups of upper layer flows collectors and bottom spray header for cold section, and fine cold-leg is made up of other nine groups of upper layer flows collectors and bottom spray header.
Cold section edge of described master band steel traffic direction is divided into strong cooling section, inferior strong cooling zone and low three cooling zones, strong cooling zone, first and second group upper layer flows collector and bottom spray header are formed strong cooling section, form time strong cooling zone for third and fourth group, the 5th to the 8th group of upper layer flows collector and bottom spray header are formed low strong cooling zone.
The feedforward system of described temperature measuring equipment and computer control system links, and computer control system also links with the water spray control device and the strip coiling drive unit of upper layer flows collector and bottom spray header.
Only adopt two cooling sections and three points for measuring temperature in this strip coiling temperature-controlled process, can effectively reduce the complexity of computer control system, simultaneously also can effectively shorten the total length of cooling zone, this also effectively reduces the influence power of the cooling effect of the extraneous factor that certainly exists greatly, has improved temperature controlled accuracy.This strip coiling temperature control equipment is lowered the temperature to the band steel by a spot of water spray collector, coiling speed that simultaneously will the band steel is also as effective compensating parameter, has improved compensating parameter and has caused the lower the temperature defective of control accuracy difference of band steel less.
This strip coiling temperature control equipment is arranged on the finishing mill rear end, the band steel is the cooling zone that level enters this coiling temperature control apparatus, main cold section front end, promptly be with the steel porch to be provided with a temperature measuring equipment, initial temperature to the band steel is measured, traffic direction along the band steel, be distributed with main cold section strong cooling section successively, inferior strong cooling section and low strong cooling section, strong cooling section first, the injection flow rate and the water-jet velocity maximum of two groups of upper layer flows collectors and bottom spray header, be the caliber maximum, the upper layer flows collector of inferior strong cooling section and low strong cooling section and the injection flow rate and the water-jet velocity of bottom spray header reduce successively.The upper layer flows collector of fine cold-leg and the injection flow rate of bottom spray header and water-jet velocity minimum, it is mainly used in meticulous adjustment, and the result who is used for main cold section finely tunes.
Beneficial effect of the present invention is, the cooling zone contraction in length of this strip coiling temperature control equipment, point for measuring temperature reduces, temperature-controlled process is simply accurate, effectively reduced the influence of other factors to the cooling of band steel, improved the strip coiling control accuracy of temperature, the actual coiling temperature of band steel of this strip coiling temperature control equipment cooling of process and the Deviation Control of target temperature are in 20 ℃, hit rate is more than 99.5%, effectively raise the mechanical performance of belt steel product, also significantly reduced the online sample size of band steel simultaneously.
Description of drawings
The invention will be further described below with reference to drawings and Examples.
Fig. 1 is the overall structure schematic diagram of temperature control equipment in the embodiment of the invention;
Fig. 2 is the structural principle schematic diagram of temperature controlled processes and attemperating unit in the embodiment of the invention.
The specific embodiment
This strip coiling temperature-controlled process is along the traffic direction of being with steel the cooling zone to be set, main cold section and two cooling sections of fine cold-leg successively distribute, in the water spray cooling zone three place's temperature measuring equipments are set respectively, in order to detect belt steel temperature, and as the preceding feedforward parameter of computer control system, computer control system compares preceding feedforward parameter and setting value and compensate, thus the coiling temperature of adjusting the injection flow rate of water spray collector and being with the coiling speed control band steel of steel.
As figure, adopt the cooling zone of the strip coiling temperature control equipment of this temperature-controlled process mainly to form by the bottom spray header of 17 groups of upper layer flows collectors and respective numbers, described cooling zone is formed by cold section of master and two cooling zones serial connections of fine cold-leg.Main cooling zone includes eight groups of water spray collectors, and water spray collector group a is a strong cooling section, and water spray collector group b becomes time strong cooling zone, and water spray collector group c becomes low strong cooling zone.Fine cold-leg is made up of nine groups of water spray collectors, mainly the chilling temperature that batches to the band steel carries out trickle adjustment, cold section front end is provided with temperature measuring equipment 1, cold section of master respectively and the fine cold-leg junction is provided with temperature measuring equipment 2, the fine cold-leg end is provided with temperature measuring equipment 3 leading, in order to the actual value of detected temperatures, this temperature value that records is as preceding feedforward parameter.This device also comprises a computer control system, the feedforward system of described temperature measuring equipment and this computer control system links, and computer control system also links with the water spray control device and the strip coiling drive unit of upper layer flows collector and bottom spray header.
The temperature control feedforward system that is adopted in the strip coiling temperature-controlled process that is adopted.This system mainly comprises the computer of a built-in computation model, calculates by the setting of the internal model in computer calculating and feedforward and finishes whole temperature controlled processes.The implementation procedure of this control is: the computation model that carries out the cooling zone initial parameter according to required salband steel in the computer control system is set, and this initial parameter comprises the injection flow rate size of the water spray collector of main cold section and each cooling zone of fine cold-leg in the cooling zone and the coiling speed of hot-rolled steel; When cooling off, the band steel is measured the cooled temperature of temperature, medium temperature and accurate adjustment before the cooling successively by main cold section and fine cold-leg and by the temperature measuring equipment that is separately positioned on main cold section front end, main cold section and fine cold-leg junction, fine cold-leg end successively, this temperature value is as the preceding feedforward parameter of computer control system, compare and compensate with setting model then, adjust the coiling speed of the injection flow rate and the band steel of water spray collector simultaneously.
Claims (8)
1. strip coiling temperature-controlled process, comprise cooling zone and computer control system that the water spray collector is formed, it is characterized in that cooling zone traffic direction distribution main cold section and two cooling sections of fine cold-leg along the band steel, three place's temperature measuring equipments are set respectively in the cooling zone, in order to detect belt steel temperature, and as the preceding feedforward parameter of computer control system, computer control system compares preceding feedforward parameter and setting value and compensate, thus the coiling temperature of adjusting the injection flow rate of water spray collector and being with the coiling speed control band steel of steel.
2. a kind of strip coiling temperature-controlled process according to claim 1, the control procedure that it is characterized in that computer control system is: the computation model that carries out the cooling zone initial parameter according to required salband steel in the computer control system is set, and this initial parameter comprises the injection flow rate size of the water spray collector of main cold section and each cooling section of fine cold-leg in the cooling zone and the coiling speed of band steel; When cooling off, the band steel is measured the cooled temperature of temperature, medium temperature and accurate adjustment before the cooling successively by main cold section and fine cold-leg and by the temperature measuring equipment that is separately positioned on main cold section front end, main cold section and fine cold-leg junction, fine cold-leg end successively, this temperature value is as the preceding feedforward parameter of computer control system, compare and compensate with setting model then, adjust the coiling speed of the injection flow rate and the band steel of water spray collector simultaneously.
3. a kind of strip coiling temperature-controlled process according to claim 1, it is characterized in that described cooling zone is made up of upper layer flows collector and bottom spray header, main cold section front end, main cold section and fine cold-leg junction, fine cold-leg end are provided with temperature measuring equipment respectively.
4. a kind of strip coiling temperature-controlled process according to claim 1, it is characterized in that described cooling zone is made up of the bottom spray header of 17 groups of upper layer flows collectors and equivalent amount, described master comprises eight groups of upper layer flows collectors and bottom spray header for cold section, fine cold-leg is made up of other nine groups of upper layer flows collectors and bottom spray header, and the injection flow rate of upper layer flows collector and bottom spray header reduces successively along band steel traffic direction.
5. adopt the strip coiling temperature control equipment of the described control method of claim 1, comprise cooling zone and computer control system, described cooling zone is made up of upper layer flows collector and bottom spray header, it is characterized in that, the cooling zone is divided into main cold section and fine cold-leg, and main cold section front end, cold section of master and fine cold-leg junction, fine cold-leg end are provided with temperature measuring equipment respectively.
6. strip coiling temperature control equipment according to claim 5, it is characterized in that, described cooling zone is made up of the bottom spray header of 17 groups of upper layer flows collectors and equivalent amount, described master comprises eight groups of upper layer flows collectors and bottom spray header for cold section, and fine cold-leg is made up of other nine groups of upper layer flows collectors and bottom spray header.
7. strip coiling temperature control equipment according to claim 5, it is characterized in that cold section edge of described master band steel traffic direction is divided into strong cooling section, inferior strong cooling zone and low three cooling zones, strong cooling zone, first and second group upper layer flows collector and bottom spray header are formed strong cooling section, form time strong cooling zone for third and fourth group, the 5th to the 8th group of upper layer flows collector and bottom spray header are formed low strong cooling zone.
8. strip coiling temperature control equipment according to claim 5, the feedforward system that it is characterized in that described temperature measuring equipment and computer control system links, and computer control system also links with the water spray control device and the strip coiling drive unit of upper layer flows collector and bottom spray header.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101707462A CN100431726C (en) | 2006-12-22 | 2006-12-22 | Strip steel reeling temperature controlling method and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101707462A CN100431726C (en) | 2006-12-22 | 2006-12-22 | Strip steel reeling temperature controlling method and device |
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| CN1974041A CN1974041A (en) | 2007-06-06 |
| CN100431726C true CN100431726C (en) | 2008-11-12 |
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| CNB2006101707462A Expired - Fee Related CN100431726C (en) | 2006-12-22 | 2006-12-22 | Strip steel reeling temperature controlling method and device |
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| CN102073294B (en) * | 2009-07-21 | 2012-10-03 | 南通宝钢钢铁有限公司 | Rolled bar cooling automatic closed-loop control system and method |
| CN102125937B (en) * | 2010-01-14 | 2012-12-12 | 宝山钢铁股份有限公司 | Temperature control method in hot-rolled strip tailing-out process |
| CN101844157B (en) * | 2010-04-28 | 2013-09-18 | 刘森 | Integrated roll line control-based hot rolling cooling water control method and system |
| CN102259116B (en) * | 2010-05-26 | 2013-06-19 | 宝山钢铁股份有限公司 | Slab band position detecting device for water cooling zone |
| CN101879531A (en) * | 2010-05-31 | 2010-11-10 | 北京科技大学 | Hot rolled strip laminar cooling device capable of controlling cooled strip shape |
| CN102166582B (en) * | 2010-12-13 | 2013-02-27 | 河北省首钢迁安钢铁有限责任公司 | Method for improving control precision of coiling temperature |
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| CN102441578B (en) * | 2011-12-28 | 2013-12-25 | 河北省首钢迁安钢铁有限责任公司 | Method for increasing coiling temperature control accuracy of low temperature steel |
| CN102658301B (en) * | 2012-05-04 | 2014-11-12 | 武汉钢铁(集团)公司 | Control and modifying unit of scale of hot rolling strip steel |
| CN103611735B (en) * | 2013-12-10 | 2015-11-04 | 武汉钢铁(集团)公司 | A kind of section cooling temperature monitoring method and device |
| CN104942042B (en) * | 2014-03-28 | 2017-02-22 | 宝山钢铁股份有限公司 | Reeling control method based on multiple reeling machines |
| CN105734235B (en) * | 2014-12-10 | 2017-12-19 | 上海梅山钢铁股份有限公司 | A kind of intensive cooling control method of hot-continuous-rolling strip steel |
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| CN107716561A (en) * | 2017-09-15 | 2018-02-23 | 首钢京唐钢铁联合有限责任公司 | Strip Steel Coiling Temperature control method, device, computer-readable storage medium and equipment |
| CN110184447B (en) * | 2018-02-23 | 2020-12-22 | 宝山钢铁股份有限公司 | Intelligent fine cooling control method for normalized pickling line |
| CN112916621B (en) * | 2019-12-05 | 2022-10-14 | 上海梅山钢铁股份有限公司 | Energy-saving control method for hot rolling turbid circulating water process |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07185632A (en) * | 1993-12-28 | 1995-07-25 | Sumitomo Metal Ind Ltd | Cooling controller for strip metallic material |
| JPH0919712A (en) * | 1995-06-30 | 1997-01-21 | Nippon Steel Corp | Device for controlling cooling of steel sheet |
| JPH09216011A (en) * | 1996-02-08 | 1997-08-19 | Sumitomo Metal Ind Ltd | Method for controlling cooling of hot rolled steel sheet |
| CN1640575A (en) * | 2004-01-12 | 2005-07-20 | 鞍钢集团新钢铁有限责任公司 | Band-steel laminar-flow cooling device and its cooling control method |
| CN1753735A (en) * | 2003-02-25 | 2006-03-29 | 西门子公司 | Method for regulating the temperature of a metal strip, especially in a cooling path |
| CN1802225A (en) * | 2003-06-13 | 2006-07-12 | 杰富意钢铁株式会社 | Device and method for controllably cooling thick steel plate |
-
2006
- 2006-12-22 CN CNB2006101707462A patent/CN100431726C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07185632A (en) * | 1993-12-28 | 1995-07-25 | Sumitomo Metal Ind Ltd | Cooling controller for strip metallic material |
| JPH0919712A (en) * | 1995-06-30 | 1997-01-21 | Nippon Steel Corp | Device for controlling cooling of steel sheet |
| JPH09216011A (en) * | 1996-02-08 | 1997-08-19 | Sumitomo Metal Ind Ltd | Method for controlling cooling of hot rolled steel sheet |
| CN1753735A (en) * | 2003-02-25 | 2006-03-29 | 西门子公司 | Method for regulating the temperature of a metal strip, especially in a cooling path |
| CN1802225A (en) * | 2003-06-13 | 2006-07-12 | 杰富意钢铁株式会社 | Device and method for controllably cooling thick steel plate |
| CN1640575A (en) * | 2004-01-12 | 2005-07-20 | 鞍钢集团新钢铁有限责任公司 | Band-steel laminar-flow cooling device and its cooling control method |
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