CN110595207A - Control method for accurate positioning of heating furnace walking beam - Google Patents
Control method for accurate positioning of heating furnace walking beam Download PDFInfo
- Publication number
- CN110595207A CN110595207A CN201910742797.5A CN201910742797A CN110595207A CN 110595207 A CN110595207 A CN 110595207A CN 201910742797 A CN201910742797 A CN 201910742797A CN 110595207 A CN110595207 A CN 110595207A
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- China
- Prior art keywords
- walking beam
- laser
- heating furnace
- steel tapping
- walking
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Classifications
-
- 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
- C21D9/70—Furnaces for ingots, i.e. soaking pits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/39—Arrangements of devices for discharging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/40—Arrangements of controlling or monitoring devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D2003/0001—Positioning the charge
- F27D2003/0002—Positioning the charge involving positioning devices, e.g. buffers, buffer zones
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The invention discloses a control method for the accurate positioning of a walking beam of a heating furnace, wherein the laser displacement of the tapping of the heating furnace is successful, and the accurate positioning control logic of the walking beam of the heating furnace is debugged and brought on line, and the control method comprises the following steps: measuring the difference between the movable beam of the walking beam at the highest position and the fixed beam and the distance between the laser hole and the steel tapping side of the walking beam; at the moment, the position of the laser hole is shifted during the furnace shutdown, and the lateral movement of the steel tapping furnace door is shifted to 1 meter, so that the upper positions of the steel tapping laser and the walking beam moving beam are staggered by 200-210 mm; thirdly, program logic modification is carried out on the position of the steel tapping end of the walking beam according to the actual laser position, and the walking beam is determined to finally adopt a small step principle so as to perfect the final logic of the walking beam; and fourthly, performing on-site tracking and debugging optimization.
Description
Technical Field
The invention relates to the technical field of steel rolling automation, in particular to a control method for accurate positioning of a heating furnace walking beam.
Background
The laser discharged from the No. 1 heating furnace of the medium and thick plate coil factory often causes the phenomenon that the laser is shielded by the oxidizing slag due to the fact that the oxidizing slag on the cushion block of the movable beam is high in accumulation, and therefore the laser detection is abnormal; in addition, the original designed slab specification is 150mm-180mm in thickness. Because the height difference between the movable beam and the fixed beam is 100mm when the movable beam is at a high position, when the thickness of the plate blank is smaller, the detection laser arranged at the steel tapping side can be blocked by the beam body in the hearth. The production requirement of blank opening can not be met on site. Aiming at the two problems, the prior attempts of schemes such as steel tapping laser displacement, top laser detection and the like can not completely solve the problems through demonstration and actual operation, so the invention provides a control method for the accurate positioning of the heating furnace walking beam.
Disclosure of Invention
The invention aims to solve the technical problems that a control method for the accurate positioning of the heating furnace walking beam is provided aiming at the defects in the prior art, and on one hand, a series of problems that the oxidizing slag blocks laser, blanks are cut, the detection of a blank hearth with the thickness smaller than the original design thickness is inaccurate and the like are solved; on the other hand, the hearth space can be effectively utilized, and the heating capacity is improved by 0.7 percent under the control of the same combustion system.
The technical scheme for solving the technical problems is as follows:
a control method for accurate positioning of a walking beam of a heating furnace is provided, wherein the laser displacement of the tapping of the heating furnace is successful, and the accurate positioning control logic of the walking beam of the heating furnace is debugged and on-line, and the control method comprises the following steps:
measuring the difference between the movable beam of the walking beam at the highest position and the fixed beam and the distance between the laser hole and the steel tapping side of the walking beam;
at the moment, the position of the laser hole is shifted during the furnace shutdown, and the lateral movement of the steel tapping furnace door is shifted to 1 meter, so that the upper positions of the steel tapping laser and the walking beam moving beam are staggered by 200-210 mm;
thirdly, program logic modification is carried out on the position of the steel tapping end of the walking beam according to the actual laser position, and the walking beam is determined to finally adopt a small step principle so as to perfect the final logic of the walking beam;
and fourthly, performing on-site tracking and debugging optimization.
The technical scheme of the invention is further defined as follows:
in the control method for the accurate positioning of the heating furnace walking beam, in the step (III), the program logic modifies the numerical value of the position where the laser is located in the concrete operation and the distance between the laser and the steel tapping furnace door, and inputs the numerical value and the distance into the sequence control program for calculation; after the plate blank is blocked by the laser in the hearth, the front edge position of the plate blank is calculated according to each walking stroke of the walking beam and is compared with the fixed position of the laser, and if the front edge position of the plate blank is consistent with the fixed position of the laser, the positioning position is accurate, and secondary adjustment is not needed; if the deviation exists, the deviation value is displayed in the picture and is alarmed for prompting, and then the walking beam is adjusted in the stepping position for a small step according to the deviation value, and finally the deviation is eliminated.
The technical scheme adopted by the invention has the beneficial effects that: in the process of advancing the plate blank in the hearth, after the front edge of the plate blank detects laser, a laser detection signal is interrupted, and after the signal is interrupted, a feedback signal is triggered to the PLC; therefore, the change of the laser hole position needs to be calculated by inputting the numerical value of the position of the laser and the distance between the laser and the steel furnace door into the sequence control program through program modification. After the plate blank is blocked by the laser in the hearth, the front edge position of the plate blank is calculated according to each walking stroke of the walking beam and is compared with the fixed position of the laser, and if the front edge position of the plate blank is consistent with the fixed position of the laser, the positioning position is accurate and does not need to be adjusted again. If the deviation exists, the deviation value is displayed in the picture and is alarmed for prompting, and then the walking beam is adjusted in the stepping position for a small step according to the deviation value, and finally the deviation is eliminated. Thereby realizing the accurate positioning of the plate blank in the hearth. This is the main function of this control method; the laser hole staggers the lifting position of the movable beam after the steel tapping laser position moves forwards, so that the thickness of the plate blank is not influenced by the difference (100 mm) between the walking beams. The original slab thickness must be greater than 130mm because of the critical position ± 15mm considering the height difference of 100 mm. Slabs with a thickness of less than 130mm may result in the moving beam being indistinguishable from the slab. In this way, it is no longer limited. The third effect of the invention is that the hearth space of the walking beam furnace is improved. Stopping at the original laser detection position, stopping with the existing laser detection position, and increasing by nearly 1 meter in the width direction of the hearth space.
By the technical scheme of the invention, 1) the influence of steel positioning caused by the interference of the oxidizing slag is thoroughly solved. 2) The walking mode of the walking beam is changed from the original equal step distance mode into the mode that the blank collides with the laser line to stop, the front end of the plate blank is averagely forward 200mm, which is equivalent to that the furnace body is increased by 200mm, the coverage rate of the plate blank in the furnace is increased by nearly 1 percent, and is equivalent to that the heating capacity is improved by 0.7 percent under the condition of not increasing fuel. 3) At present, tapping laser is in a signal triggering and maintaining mode, and automatic tapping of blanks with the thickness of more than 80mm can be realized; the energy consumption is reduced by 0.7%; 48 yuan/ton 150 ten thousand/year ton 0.7% =42 ten thousand yuan/year; the productivity of the heating furnace is improved by 0.7 percent, and is estimated to be 20 ten thousand yuan per year; the hidden trouble caused by the phenomenon is eliminated, the production delay is reduced, and the influence of 10 ten thousand yuan per year is reduced; and (4) accumulating benefits: 42+20+10=72 ten thousand yuan/year.
Detailed Description
Example 1
The embodiment provides a control method for accurate positioning of a walking beam of a heating furnace, wherein the tapping laser of the heating furnace is successfully shifted, and the accurate positioning control logic of the walking beam of the heating furnace is debugged and on-line, and the control method comprises the following steps:
measuring the difference between the movable beam of the walking beam at the highest position and the fixed beam and the distance between the laser hole and the steel tapping side of the walking beam;
at the moment, the position of the laser hole is shifted during the furnace shutdown, and the steel tapping furnace door is laterally shifted to 1 m, so that the steel tapping laser and the upper position of the walking beam moving beam are staggered by 200 mm;
thirdly, program logic modification is carried out on the position of the steel tapping end of the walking beam according to the actual laser position, and the walking beam is determined to finally adopt a small step principle so as to perfect the final logic of the walking beam;
fourthly, performing on-site tracking and debugging optimization;
in the step (III), the program logic modification specific operation is to input the numerical value of the position where the laser is positioned and the distance between the laser and the steel tapping furnace door into a sequence control program for calculation; after the plate blank is blocked by the laser in the hearth, the front edge position of the plate blank is calculated according to each walking stroke of the walking beam and is compared with the fixed position of the laser, and if the front edge position of the plate blank is consistent with the fixed position of the laser, the positioning position is accurate, and secondary adjustment is not needed; if the deviation exists, the deviation value is displayed in the picture and is alarmed for prompting, and then the walking beam is adjusted in the stepping position for a small step according to the deviation value, and finally the deviation is eliminated.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (2)
1. The control method for the accurate positioning of the walking beam of the heating furnace is characterized in that the laser displacement of the heating furnace tapping is successful, and the accurate positioning control logic of the walking beam of the heating furnace is debugged and on-line, and comprises the following steps: the control method comprises the following steps:
measuring the difference between the movable beam of the walking beam at the highest position and the fixed beam and the distance between the laser hole and the steel tapping side of the walking beam;
at the moment, the position of the laser hole is shifted during the furnace shutdown, and the lateral movement of the steel tapping furnace door is shifted to 1 meter, so that the upper positions of the steel tapping laser and the walking beam moving beam are staggered by 200-210 mm;
thirdly, program logic modification is carried out on the position of the steel tapping end of the walking beam according to the actual laser position, and the walking beam is determined to finally adopt a small step principle so as to perfect the final logic of the walking beam;
and fourthly, performing on-site tracking and debugging optimization.
2. The method for controlling the accurate positioning of the walking beam of the heating furnace according to claim 1, wherein: the program logic modification specific operation in the step (III) is to input the numerical value of the position where the laser is positioned and the distance between the laser and the steel tapping furnace door into a sequence control program for calculation; after the plate blank is blocked by the laser in the hearth, the front edge position of the plate blank is calculated according to each walking stroke of the walking beam and is compared with the fixed position of the laser, and if the front edge position of the plate blank is consistent with the fixed position of the laser, the positioning position is accurate, and secondary adjustment is not needed; if the deviation exists, the deviation value is displayed in the picture and is alarmed for prompting, and then the walking beam is adjusted in the stepping position for a small step according to the deviation value, and finally the deviation is eliminated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910742797.5A CN110595207A (en) | 2019-08-13 | 2019-08-13 | Control method for accurate positioning of heating furnace walking beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910742797.5A CN110595207A (en) | 2019-08-13 | 2019-08-13 | Control method for accurate positioning of heating furnace walking beam |
Publications (1)
| Publication Number | Publication Date |
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| CN110595207A true CN110595207A (en) | 2019-12-20 |
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| CN201910742797.5A Pending CN110595207A (en) | 2019-08-13 | 2019-08-13 | Control method for accurate positioning of heating furnace walking beam |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220476A (en) * | 2011-03-29 | 2011-10-19 | 上海宝钢工业检测公司 | Control method for meeting tapping interval during inserting blank materials in stepping heating furnace |
| CN102221292A (en) * | 2011-04-29 | 2011-10-19 | 上海宝钢工业检测公司 | Dynamically regulating device of walking-type heating furnace plate blank discharging stop bit and using method thereof |
| CN102345009A (en) * | 2011-10-20 | 2012-02-08 | 攀钢集团西昌钢钒有限公司 | Method for automatically correcting tracking process of heating furnace |
| CN105219947A (en) * | 2014-06-30 | 2016-01-06 | 宝山钢铁股份有限公司 | Slab spillage sequential control method when walking beam is marked time |
| CN205372005U (en) * | 2015-12-14 | 2016-07-06 | 武汉钢铁(集团)公司 | Heating furnace swashs optical detector installing support |
-
2019
- 2019-08-13 CN CN201910742797.5A patent/CN110595207A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220476A (en) * | 2011-03-29 | 2011-10-19 | 上海宝钢工业检测公司 | Control method for meeting tapping interval during inserting blank materials in stepping heating furnace |
| CN102221292A (en) * | 2011-04-29 | 2011-10-19 | 上海宝钢工业检测公司 | Dynamically regulating device of walking-type heating furnace plate blank discharging stop bit and using method thereof |
| CN102345009A (en) * | 2011-10-20 | 2012-02-08 | 攀钢集团西昌钢钒有限公司 | Method for automatically correcting tracking process of heating furnace |
| CN105219947A (en) * | 2014-06-30 | 2016-01-06 | 宝山钢铁股份有限公司 | Slab spillage sequential control method when walking beam is marked time |
| CN205372005U (en) * | 2015-12-14 | 2016-07-06 | 武汉钢铁(集团)公司 | Heating furnace swashs optical detector installing support |
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Application publication date: 20191220 |
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