CN114134311A - On-line accurate positioning device and method in heating furnace slab furnace - Google Patents
On-line accurate positioning device and method in heating furnace slab furnace Download PDFInfo
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- CN114134311A CN114134311A CN202111289306.XA CN202111289306A CN114134311A CN 114134311 A CN114134311 A CN 114134311A CN 202111289306 A CN202111289306 A CN 202111289306A CN 114134311 A CN114134311 A CN 114134311A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000000149 penetrating effect Effects 0.000 claims description 37
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 238000010079 rubber tapping Methods 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 238000006073 displacement reaction Methods 0.000 claims description 14
- 230000002159 abnormal effect Effects 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/70—Furnaces for ingots, i.e. soaking pits
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
-
- 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
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
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- Engineering & Computer Science (AREA)
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- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention mainly relates to the field of automatic control, in particular to an online accurate positioning device and method in a heating furnace slab furnace. The plate blank tracking in the walking beam furnace, the laser photoelectric tube for discharging through the furnace wall and the walking beam magnetic scale are combined, and the accurate and stable online positioning control method for the plate blank before discharging of the heating furnace is provided. Due to the through-wall laser detector, the situation that signal flash is not detected or detected but occurs in the middle can occur, so that the calculated value of the distance of the slab passing through the furnace wall photoelectric tube can be directly influenced; and at the moment, slab tracking data is introduced to calculate the over-laser distance II, and the over-laser distance II is compared with the over-laser distance I calculated before for correction, so that problems can be found in time.
Description
Technical Field
The invention mainly relates to the field of automatic control, in particular to an online accurate positioning device and method in a heating furnace slab furnace.
Background
The raw material plate blank used for the production of the rolling line can enter the rolling line for rolling after being heated by the heating furnace, so that whether the heating furnace can ensure safe and normal operation and heat qualified steel blanks or not has a crucial decision function on whether the whole rolling line can continuously and stably produce the steel blanks or not. The accurate positioning control technology of the plate blank in the furnace is one of the core control technologies in the automatic control system of the heating furnace, in particular to the accurate control of the position tracking relationship before the plate blank is discharged to the walking beam and the tapping machine in the furnace. Generally, the position tracking of the plate blank in the walking beam type heating furnace is obtained by means of accumulation calculation of magnetic scale measurement data, when the plate blank moves to the position near a discharging furnace door, a furnace wall penetrating laser photoelectric tube is used for detecting, and then a steel picking stroke is calculated by a steel tapping machine according to the distance of the plate blank penetrating the furnace wall laser photoelectric tube. However, in actual production, the condition that the steel tapping machine does not place the plate blank on the central line of the discharging roller way, the edge of the roller way is scratched in the plate blank transportation process, the roller way is damaged, and production is delayed is often caused because the photoelectric tube penetrating through the furnace wall generates error signals due to various reasons, so that the plate blank discharged from the heating furnace is accurately positioned, and accurate steel picking of the steel tapping machine is an important content for realizing stable production of the heating furnace.
Disclosure of Invention
The invention combines the plate blank tracking in the walking beam furnace with the laser photoelectric tube of the discharging furnace wall, and provides an accurate and stable online positioning control method for the plate blank before the furnace discharging of the heating furnace.
An online accurate positioning device in a heating furnace slab furnace comprises a walking beam, a furnace wall penetrating laser photoelectric tube, a walking beam magnetic scale and an encoder; the walking beam is arranged in the heating furnace; the furnace wall penetrating laser photoelectric tube comprises a wall penetrating laser photoelectric tube transmitting end and a wall penetrating laser photoelectric tube receiving end, and the wall penetrating laser photoelectric tube transmitting end and the wall penetrating laser photoelectric tube receiving end are respectively positioned on two sides of a preset position at the tail end of the walking beam; the walking beam magnetic scale is arranged on a transmission cylinder of the walking beam; the encoder is arranged in the heating furnace PLC and can receive data signals collected by the furnace wall penetrating laser photoelectric tube and the walking beam magnetic scale and output the data signals.
Further, the encoder can transmit the data signal to a computer of the engineer station through the ethernet.
Further, the steel tapping machine is arranged at the outlet of the heating furnace.
An online accurate positioning method in a heating furnace slab furnace comprises the following steps:
s1, starting a walking beam, and accumulating displacement distance data signals collected by a walking beam magnetic scale to obtain the total displacement distance of a plate blank;
s2, subtracting the distance of the position of the through-furnace wall laser photoelectric tube from the total displacement distance of the plate blank accumulated each time to obtain a numerical value, outputting the numerical value and calculating to be recorded as a through-laser distance II after the first numerical value is larger than 0, meanwhile, opening the through-furnace wall laser photoelectric tube when the total displacement distance of the plate blank is larger than a preset value, and then obtaining the through-laser distance I according to the action of the walking beam;
s3, comparing the over-laser distance I with the over-laser distance II, and checking whether the data are normal or not according to the difference value of the two data;
and S4, after the data are transmitted into the steel tapping machine to calculate the stroke, the steel tapping machine picks the plate blank out of the heating furnace.
Further, in step S2, if no slab is detected after the furnace wall-penetrating laser photocell is opened, the walking beam is started again to move for one cycle; if the slab is not detected, the abnormal condition of the laser photoelectric tube penetrating through the furnace wall is directly alarmed, and the specific condition is checked by the staff.
Further, in the step S3, if the data of the over-laser distance one and the over-laser distance two are normal, the steps are performed normally; if the two data are abnormal, the abnormal situation of the laser photoelectric tube penetrating through the furnace wall is alarmed, and the specific situation is checked by a worker.
Further, the first laser beam passing distance is as follows: and recording the translation value of the magnetic scale of the walking beam when the slab firstly touches a laser photoelectric tube penetrating through the furnace wall during translation as A, recording the translation value of the magnetic scale of the walking beam after the slab completely runs down as B, and subtracting A from B by the distance of the laser.
The invention has the following beneficial effects: during normal production, the flue gas is more in the heating furnace discharge end stove, even adopt high-quality laser detector, still probably by stove black cigarette, moving object etc. false triggering and influence slab accurate positioning, can play the detection effect again when the slab reachs near the wall photoelectric tube in the time of establishing wall photoelectric tube detection window period this moment, the excessive laser distance that calculates this moment effectively prevents that the signal false triggering from bringing the detection unusual.
In addition, due to the through-wall laser detector, the situation that the flashover of the signal is not detected or is detected but occurs in the middle can occur, and therefore the calculated value of the distance of the slab passing through the furnace wall photoelectric tube can be directly influenced. And at the moment, slab tracking data is introduced to calculate the over-laser distance II, and the over-laser distance II is compared with the over-laser distance I calculated before for correction, so that problems can be found in time.
By adopting the method and the device, the slab can be accurately positioned in the through-wall photoelectric tube detection window period, and the over-laser distance calculated by referring to the slab tracking position can be corrected again even if an error signal is generated. The intelligent alarm output prompts the intervention of operators when the correction range is exceeded, so that the rapidity and the safety and the reliability of slab positioning are improved.
Drawings
FIG. 1 is a diagram of a system hardware configuration of the present invention;
FIG. 2 is a schematic view of a slab in a furnace;
FIG. 3 is a flow chart of the method of the present invention.
Description of reference numerals: 1. go into the stove roll table, 2, wear stove wall laser photoelectric tube, 3, walking beam magnetic scale, 4, fixed beam, 5, walking beam, 6, wear wall laser photoelectric tube transmitting terminal, 7, ejection of compact furnace gate, 8, the roll table of coming out of the stove, 9, the tapping machine, 10, roll table central line of coming out of the stove, 11, wear wall laser photoelectric tube receiving terminal, 12, the slab of coming out of the stove, 13, the slab of stove in, 14, the door of charging the stove, 15, the furnace body, 16, engineer's station, 17, heating furnace PLC.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to the accompanying drawings.
Take a regenerative stepping furnace with a wide and thick plate with a furnace length of 49.50 meters as an example. As shown in fig. 1 and 2, the invention comprises a walking beam, a furnace wall penetrating laser photoelectric tube 2, a walking beam magnetic scale 3 and an encoder; the walking beam is arranged in the heating furnace, the transverse moving step distance is 600mm, and the lifting distance of each step is 200 mm; the furnace wall penetrating laser photoelectric tube 2 comprises a wall penetrating laser photoelectric tube transmitting end 6 and a wall penetrating laser photoelectric tube receiving end 11, and is respectively positioned on two sides of a preset position at the tail end of the walking beam and is positioned 47.29 meters away from the inlet of the heating furnace; the walking beam magnetic scale 3 is arranged on a transmission cylinder of the walking beam; the tapping machine 9 is arranged at the outlet of the heating furnace; the encoder is arranged in the heating furnace PLC17, can receive data signals collected by the furnace wall penetrating laser photoelectric tube 2 and the walking beam magnetic scale 3, and transmits the data to a computer of the engineer station 16 through the Ethernet.
In the heating furnace and related structures are shown in fig. 2, a plate blank 13 is lifted into a furnace body 15 by a walking beam before being conveyed to a charging furnace door 14 through a furnace entering roller way 1, and finally, after passing through a wall-penetrating laser photoelectric tube transmitting end 6 and a wall-penetrating laser photoelectric tube receiving end 11, the plate blank 13 is lifted out of a discharging furnace door 7 by a tapping machine 9 and is placed on a furnace exiting roller way 8;
as shown in fig. 3, the method for accurately positioning the heating furnace slab 13 on the furnace inside includes the following steps:
s1, opening a walking beam, lifting a plate blank 13 from a charging furnace door 14 to a discharging furnace door 7 step by step, accumulating displacement distance data signals acquired by a walking beam magnetic scale 3 in each step during the period, obtaining the total displacement distance of the plate blank 13, and storing the total displacement distance into a data block;
s2, subtracting the distance of the position of the furnace wall penetrating laser photoelectric tube 2 from the total displacement distance of the plate blank 13 accumulated each time to obtain a numerical value, outputting the numerical value until the first numerical value is greater than 0, calculating the numerical value and recording the numerical value as a second laser distance, and meanwhile, opening the furnace wall penetrating laser photoelectric tube 2 and a window when the total displacement distance of the plate blank 13 is greater than 46 meters and obtaining the first laser distance according to the action of the walking beam; if the plate blank 13 is not detected after the furnace wall penetrating laser photoelectric tube 2 is opened, the walking beam is started again to move for a period; if the slab 13 is not detected, the abnormal condition of the furnace wall penetrating laser photoelectric tube 2 is directly alarmed, and the specific condition is checked by the staff.
S3, comparing the over-laser distance I with the over-laser distance II, and checking whether the data are normal or not according to the difference value of the two data; if the difference value between the over-laser distance I and the over-laser distance II is smaller, the steps are normally carried out; if the difference value of the two data is large, the abnormal situation of the furnace wall penetrating laser photoelectric tube 2 is alarmed, and the worker checks the specific situation and then adjusts the situation in time.
And S4, after the data are transmitted into the steel tapping machine 9 to calculate the stroke, the steel tapping machine 9 picks the plate blank 13 out of the heating furnace.
Note:
the over-laser distance is one: recording the translation value of the magnetic scale 3 of the walking beam when the plate blank 13 is lifted and translated and firstly touches the laser photoelectric tube 2 penetrating through the furnace wall as A, recording the translation value of the magnetic scale 3 of the walking beam after the plate blank 13 finishes the whole process and falls as B, and subtracting A from B by the distance of the laser;
over-laser distance two: and recording the width of the plate blank 13 as C and the total displacement distance of the plate blank 13 as D, wherein the over-laser distance is two, namely C plus D minus 47290 mm.
The present invention can be easily implemented by those skilled in the art from the above detailed description. It should be understood, however, that the intention is not to limit the invention to the particular embodiments described. On the basis of the disclosed embodiments, a person skilled in the art can combine different technical features at will, thereby implementing different technical solutions.
Claims (7)
1. The utility model provides an online accurate positioning device in heating furnace slab stove which characterized in that: the device comprises a walking beam, a furnace wall penetrating laser photoelectric tube (2), a walking beam magnetic scale (3) and an encoder; the walking beam is arranged in the heating furnace; the furnace wall penetrating laser photoelectric tube (2) comprises a wall penetrating laser photoelectric tube transmitting end (6) and a wall penetrating laser photoelectric tube receiving end (11), and the wall penetrating laser photoelectric tube transmitting end and the wall penetrating laser photoelectric tube receiving end are respectively positioned on two sides of a preset position at the tail end of the walking beam; the walking beam magnetic scale (3) is arranged on a transmission cylinder of the walking beam; the encoder is arranged in the heating furnace PLC and can receive data signals collected by the furnace wall penetrating laser photoelectric tube (2) and the walking beam magnetic scale (3) and output the data signals.
2. The on-line precise positioning device in the heating furnace slab furnace of claim 1, characterized in that: the encoder can transmit data signals to a computer of an engineer station through an ethernet.
3. The on-line precise positioning device in the heating furnace slab furnace of claim 1, characterized in that: the steel tapping machine comprises a steel tapping machine (9), wherein the steel tapping machine (9) is arranged at an outlet of a heating furnace.
4. An online accurate positioning method in a heating furnace slab furnace is characterized in that:
the method comprises the following steps:
s1, starting a walking beam, and accumulating displacement distance data signals collected by a walking beam magnetic scale (3) to obtain the total displacement distance of a plate blank;
s2, subtracting the distance of the position of the furnace wall penetrating laser photoelectric tube (2) from the total displacement distance of the plate blank accumulated each time to obtain a numerical value, outputting the numerical value and calculating to be recorded as a second laser distance after the first numerical value is larger than 0, and meanwhile, opening the furnace wall penetrating laser photoelectric tube (2) when the total displacement distance of the plate blank is larger than a preset value, and then obtaining the first laser distance according to the action of the walking beam;
s3, comparing the over-laser distance I with the over-laser distance II, and checking whether the data are normal or not according to the difference value of the two data;
and S4, after the data are transmitted into the steel tapping machine (9) to calculate the stroke, the steel tapping machine (9) picks the plate blank out of the heating furnace.
5. The on-line accurate positioning method in the heating furnace slab furnace according to claim 2, characterized in that: in the step S2, if no slab is detected after the furnace wall penetrating laser photoelectric tube (2) is opened, the walking beam is started again to move for a period; if the slab is not detected, the abnormal condition of the furnace wall penetrating laser photoelectric tube (2) is directly alarmed, and the specific condition is checked by the staff.
6. The on-line accurate positioning method in the heating furnace slab furnace according to claim 2, characterized in that: in the step S3, if the data of the first laser distance and the second laser distance are normal, the steps are performed normally; if the two data are abnormal, the abnormal situation of the laser photoelectric tube (2) penetrating through the furnace wall is alarmed, and the specific situation is checked by a worker.
7. The on-line accurate positioning method in the heating furnace slab furnace according to claim 2, characterized in that: the first laser beam passing distance is as follows: the translation value of the walking beam magnetic scale (3) when the slab lifts up and translates and firstly touches the laser photoelectric tube (2) penetrating through the furnace wall is recorded as A, the translation value of the walking beam magnetic scale (3) after the slab finishes the whole course and falls down is recorded as B, and the laser passing distance is equal to B minus A.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111289306.XA CN114134311A (en) | 2021-11-02 | 2021-11-02 | On-line accurate positioning device and method in heating furnace slab furnace |
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| CN202111289306.XA CN114134311A (en) | 2021-11-02 | 2021-11-02 | On-line accurate positioning device and method in heating furnace slab furnace |
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| CN202111289306.XA Pending CN114134311A (en) | 2021-11-02 | 2021-11-02 | On-line accurate positioning device and method in heating furnace slab furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116144915A (en) * | 2022-12-13 | 2023-05-23 | 鞍钢集团自动化有限公司 | Control method for automatically optimizing tapping position accuracy of heating furnace |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105671302A (en) * | 2016-02-16 | 2016-06-15 | 山东钢铁股份有限公司 | Automatic slab positioning method and system for heating furnace |
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2021
- 2021-11-02 CN CN202111289306.XA patent/CN114134311A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105671302A (en) * | 2016-02-16 | 2016-06-15 | 山东钢铁股份有限公司 | Automatic slab positioning method and system for heating furnace |
Non-Patent Citations (1)
| Title |
|---|
| 刘疆: "宽厚板加热炉出钢跟踪定位控制系统优化" * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116144915A (en) * | 2022-12-13 | 2023-05-23 | 鞍钢集团自动化有限公司 | Control method for automatically optimizing tapping position accuracy of heating furnace |
| CN116144915B (en) * | 2022-12-13 | 2024-11-19 | 鞍钢集团自动化有限公司 | Control method for automatically optimizing tapping position accuracy of heating furnace |
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