CN115026271A - Method for realizing continuous casting nozzle installation measurement calibration system - Google Patents
Method for realizing continuous casting nozzle installation measurement calibration system Download PDFInfo
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- 238000009749 continuous casting Methods 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000009434 installation Methods 0.000 title claims abstract description 41
- 238000005259 measurement Methods 0.000 title claims abstract description 35
- 238000004458 analytical method Methods 0.000 claims abstract description 85
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 72
- 238000003384 imaging method Methods 0.000 claims abstract description 32
- 238000007557 optical granulometry Methods 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 238000003860 storage Methods 0.000 claims abstract description 6
- 230000005484 gravity Effects 0.000 claims description 18
- 238000005266 casting Methods 0.000 claims description 12
- 238000012545 processing Methods 0.000 claims description 12
- 239000002893 slag Substances 0.000 claims description 6
- 238000012937 correction Methods 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 3
- 238000004088 simulation Methods 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/56—Means for supporting, manipulating or changing a pouring-nozzle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D46/00—Controlling, supervising, not restricted to casting covered by a single main group, e.g. for safety reasons
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/30—Computing systems specially adapted for manufacturing
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Abstract
The invention relates to a method for realizing a continuous casting nozzle installation measurement calibration system, and relates to the technical field of continuous casting auxiliary control in the metallurgical industry. The measurement and calibration system comprises a continuous casting nozzle imaging device, a nozzle photo analysis computer, a program and an analysis result feedback and prompt system, and the measurement and calibration method comprises the following steps: and (4) taking a picture of the nozzle state through the continuous casting nozzle imaging device, sending the picture to a nozzle picture analysis computer for storage, analyzing the nozzle state by using a nozzle picture analysis program, and comparing an analysis result with a standard target. The invention takes a picture of the water gap state through the continuous casting water gap imaging device and sends the picture to the water gap picture analysis computer for storage, the water gap picture analysis program is applied to analyze the water gap state, the difference between the water gap state and a standard target is measured in real time, and the adjustment method of water gap installation is prompted, so that the vertical and centering effects of the continuous casting water gap are optimized, and the influence caused by the unstable flow of the continuously poured metal liquid is further reduced.
Description
Technical Field
The invention belongs to the technical field of continuous casting auxiliary control in the metallurgical industry, and particularly relates to an implementation method of a continuous casting nozzle installation measurement calibration system.
Background
The continuous casting production in the steel smelting industry is a process that molten steel flows into a tundish from a ladle through a long nozzle and flows into a crystallizer from the tundish through an immersion nozzle and finally solidifies, and the long nozzle and the immersion nozzle mainly play roles in drainage, sealing and air isolation.
The long nozzle and the submerged nozzle are usually installed manually, and the problems of poor sealing effect of an interface and unsatisfactory flow field of molten steel can be caused by angle and position deviation generated by installation, so that the results of poor purity of a casting blank, poor solidification structure and the like can be further caused, and furthermore, the production accidents of steel leakage caused by uneven thickness and low strength of a blank shell due to the fact that the molten steel flows wash an initially solidified blank shell due to drainage deviation of the nozzle of the crystallizer.
At present, the installation and adjustment of the long nozzle and the submerged nozzle completely depend on the visual observation, measurement and judgment of people, and the precise adjustment and the standardized execution are difficult to realize completely, so that an intelligent and accurate prompting system is necessary to be developed, and the precise adjustment in the nozzle installation and use process is further perfected to realize a good pouring effect.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for implementing a continuous casting nozzle installation measurement calibration system aiming at the prior art, wherein a nozzle state is photographed by a continuous casting nozzle imaging device and sent to a nozzle photo analysis computer for storage, a nozzle photo analysis program is applied to analyze the nozzle state, after an analysis result is compared with a standard target, a nozzle installation adjustment method is prompted by a feedback and prompting system, the gap between the nozzle state and the standard target is measured in real time, the adjustment method of nozzle installation is prompted, the vertical and centering effects of a continuous casting nozzle are optimized, and further the influence caused by unsteady flow of continuously poured metal liquid is reduced.
The technical scheme adopted by the invention for solving the problems is as follows: a method for realizing a continuous casting nozzle installation measurement calibration system comprises a continuous casting nozzle imaging device, a nozzle photo analysis computer and program, and an analysis result feedback and prompt system;
the measurement calibration method comprises the following steps: taking a picture of the water gap state through the continuous casting water gap imaging device and sending the picture to a water gap picture analysis computer for storage;
and analyzing the state of the water gap by using a water gap photo analysis program, and prompting the installation and adjustment of the water gap through a feedback and prompt system after an analysis result is compared with a standard target.
Furthermore, the method and the device for measuring and calibrating the installation of the continuous casting nozzle can be applied to a ladle-tundish long nozzle and a tundish-crystallizer submerged nozzle, and can be applied to the simultaneous measurement and calibration of a single nozzle or a plurality of nozzles.
Furthermore, the method and the device for measuring and calibrating the installation of the continuous casting nozzle can be applied to the measurement and calibration of the installation of the nozzle for continuous casting of a round billet crystallizer, a rectangular billet crystallizer and a polygonal crystallizer.
Furthermore, the pixel of the continuous casting nozzle imaging device is more than or equal to 1000 ten thousand, the exposure time is less than or equal to 1/60 seconds, the focusing range is 1-20m, a strong light filter can be omitted or added, and a gravity direction indicating line is arranged in front of a lens;
the method comprises the steps of shooting an outline image of a steel ladle-tundish long nozzle or a tundish-crystallizer immersed nozzle which is initially installed or an image of the steel ladle-tundish long nozzle or the image of the edge of a rectangular cover plate comprising the tundish-crystallizer immersed nozzle, the crystallizer and the crystallizer in the using process through manual focusing and triggering an imaging system, and automatically storing the image.
Further, the nozzle photo analysis program can be divided into an angle deviation analysis module and a position deviation analysis module according to functions;
according to the analysis stage, the method can be divided into a nozzle installation analysis mode and a nozzle use analysis mode;
in a nozzle installation analysis mode, a first picture is shot on a vertical plane which needs to pass through the center line of a nozzle and is not horizontal with a tundish, a picture is shot by a shooting point in the height range of the nozzle, then a second picture is shot by rotating counterclockwise or clockwise by 90 degrees by taking the vertical line of the connecting point of the nozzle and the bottom of the tundish as an axis by taking the shooting point of the first picture as a reference, and the second shooting point is also in the height range of the nozzle;
in the nozzle use analysis mode, a point with the same height as a certain point in the nozzle height range on the vertical plane of the central line of the nozzle which is not too long and the side line of the crystallizer is needed to take a picture.
Further, the angular deviation analysis module comprises the steps of:
step 1: calling a selected photo containing the water gap, identifying the external outline of the water gap, drawing lines at equal intervals along a parallel line of a bottom line of the photo according to the photo height 1/100-1/10 in sequence, calculating an intersecting line segment of the drawn lines and the external outline of the water gap, connecting the midpoints of the intersecting line segments, simulating and processing the intersecting line segment into a straight line according to the fact that the regression model error accounts for more than or equal to 80% of the total error percentage R-sq, and defining a counterclockwise included angle of a right photo as a positive angle and a clockwise angle as a negative angle;
step 2: in the water gap installation analysis mode, reading an included angle between a straight line of a midpoint connecting line of the analog processing water gap and a gravity direction indicating line (vertical line) according to pictures shot at two angles, prompting the water gap to follow a rotating direction and an angle which are perpendicular to the shot right opposite according to the included angle, namely the rotating direction and the angle required by the straight line of the midpoint connecting line of the water gap returning to zero, and outputting the rotating direction and the angle data to an analysis result feedback and prompting system;
and step 3: the height of the nozzle from the lower surface of the tundish to the casting surface of the crystallizer is L under the analysis mode of the nozzle use N Then calculating respective distance deviation j of two vertical directions X and Y according to the picture x And j y Calculating deviation angles of respective directions, wherein the deviation angle theta of the X direction x ’＝arctg(j x /L N ) Angle of deviation in Y direction θ y ’＝arctg(j y /L N )。
Further, the position deviation analysis module calls the selected photo containing the tundish-crystallizer submerged nozzle and the crystallizer;
for a circular crystallizer:
1) identifying the ellipse of the liquid level of the casting powder in the crystallizer and calculating the center position O of the ellipse 1 Two, two
Length of pole axis l x1 (major axis) and y1 (minor axis) and the angle alpha between the major axis of the ellipse and the edge of the rectangular cover plate (hereinafter referred to as "edge 1") of the crystallizer 1 ；
2) The outer diameter of the submerged nozzle of the crystallizer is dn, the cross section of the round billet crystallizer is straightDiameter d, crystallizer water gap close to O 1 The distance vector from the side edge point to the minor axis of the ellipse is l x1 ', the water port of the crystallizer is close to O 1 The distance vector from the side edge point to the major axis of the ellipse is l y1 ’；
3) Deviation distance j in the edge 1 direction x ＝l x1 ’·d/(l x1 ·cosα 1 ) + dn/2, deviation distance j perpendicular to the edge direction of the rectangular cover plate of the crystallizer y ＝l y1 ’·d/(l y1 ·cosα 1 )+dn/2；
For a rectangular crystallizer:
1) identifying quadrangle of casting protective slag surface in crystallizer, and calculating intersection point O of diagonal lines of quadrangle 2 Identifying or calculating the side length l of the rectangular cover plate edge (hereinafter referred to as "edge 2") of the crystallizer close to the bottom of the photo x2 And the included angle alpha between the included angle alpha and the bottom line of the photo 2 The angle alpha between the edge 2 and the bottom line of the picture 2 ' side length l intersecting with the edge of the rectangular cover plate of the crystallizer y2 And the included angle beta between the angle beta and the vertical line of the bottom line of the picture 2 ；
2) The outer diameter dn of the submerged nozzle of the crystallizer, the side length l of the rectangular crystallizer parallel to the corresponding edge of the rectangular cover plate of the crystallizer x20 The length of the side of the rectangular crystallizer vertical to the corresponding rectangular cover plate edge of the crystallizer y20 The water gap of the crystallizer is close to O 2 Side edge point to pass O 2 And the distance perpendicular to the bottom line of the picture is l x2 ', the water port of the crystallizer is close to O 2 Side pass through O 2 And the distance perpendicular to the bottom line of the picture is l y2 ’；
3) Deviation distance j in the direction of edge 2 x ＝l x2 ’·l x20 /(l x2 ·cosα 2 ') + dn/2, offset distance j in the direction perpendicular to edge 2 y ＝l y2 ’·l y20 /(l y2 ·cos(β 2 +(α 2 ’-α 2 ))+dn/2；
For a polygonal crystallizer:
1) identifying the polygon of the casting protecting slag surface in the crystallizer, and calculating the geometrical center O of the polygon 3 (even side is O) 3 Is a diagonal point, and the odd side is O 3 Is the intersection point of two or more (the corner point is connected with the midpoint of the corresponding opposite side), and has the minimum edge length l with the edge (hereinafter referred to as the edge 3) of the rectangular cover plate of the crystallizer close to the bottom of the picture x3 And the included angle alpha between the bottom line of the photo and the bottom line of the photo 3 The angle alpha between the edge 3 and the bottom line of the picture 3 ', the length l of the adjacent side of the side with the smallest angle with the side 3 y3 And the included angle beta between the angle beta and the vertical line of the bottom line of the photo 3 ；
2) The outer diameter dn of the submerged nozzle of the crystallizer, and the side length l of the side with the minimum included angle between the polygonal crystallizer and the side 3 x30 Length l of the adjacent side of the side having the smallest angle with side 3 y30 The edge (l) of the edge having the smallest angle with the edge 3 x30 ) And its adjacent side (l) y30 ) The original included angle is n3, and the water gap of the crystallizer is close to O 3 Side edge point to pass O 3 And the distance perpendicular to the bottom line of the picture is l x3 ', the water port of the crystallizer is close to O 3 Side pass through O 3 And the distance perpendicular to the bottom line of the picture is l y3 ’；
3) Offset distance j in the direction of edge 3 x ＝l x3 ’·l x30 /(l x3 ·cosα 3 ) + dn/2, offset distance j perpendicular to edge 3 y ＝l y3 ’·l y30 ·sin n3/(l y3 ·cosα 3 ·(cosα 3 ·cos(β 3 +(α 3 ’-α 3 ))+sinα 3 ·sin(β 3 +(α 3 ’-α 3 )))+dn/2。
Further, the nozzle calls an angular deviation analysis module using an analysis mode.
Further, the nozzle uses an analysis mode to call an angle deviation analysis module and a position deviation analysis module.
Further, the feedback and prompt system can be one or two of a water gap deviation correction mode, correction value result display and voice broadcast.
Compared with the prior art, the invention has the advantages that:
the invention analyzes the deviation of the nozzle in the installation or use process by a computer program, replaces the existing visual deviation analysis, digitalized and refined analysis and feedback of nozzle angle and position deviation results and adjustment parameters, sets a continuous casting nozzle installation measurement calibration system consisting of a continuous casting nozzle imaging device, a nozzle photo analysis computer and program, and an analysis result feedback and prompt system in a continuous casting area under the condition of not changing the main equipment of a continuous casting machine, photographs the nozzle state of the continuous casting nozzle imaging device which is arranged at a certain distance from the nozzle and sends the photographed nozzle state to the nozzle photo analysis computer for storage, analyzes the nozzle state by using the nozzle photo analysis program, compares the analysis result with a standard target, prompts the nozzle installation adjustment method by the feedback and prompt system, and measures the nozzle state, the gap difference between the nozzle state and the standard target in real time, The adjustment method for prompting the nozzle installation optimizes the vertical and centering effects of the continuous casting nozzle, and further reduces the influence caused by the unstable flow of the continuously poured metal liquid.
Drawings
FIG. 1 is a schematic view of a first photograph taken in a nozzle mount analysis mode of the present invention;
FIG. 2 is a schematic view of a second photograph taken in a nozzle installation analysis mode of the present invention;
FIG. 3 is a schematic view of the structure of a circular mold and a tundish;
FIG. 4 is a schematic diagram of the structure of the photograph taken in FIG. 3;
FIG. 5 is an enlarged view of a portion of FIG. 4 at A;
FIG. 6 is a schematic view of the structure of a rectangular crystallizer and a tundish;
FIG. 7 is a schematic diagram of the structure of the photograph taken in FIG. 6;
FIG. 8 is an enlarged view of a portion of FIG. 7 at B;
FIG. 9 is a schematic view of the structure of a polygonal crystallizer and a tundish;
FIG. 10 is a schematic view of the structure of the photograph taken in FIG. 9;
FIG. 11 is an enlarged view of a portion of FIG. 10 at C;
in the accompanying drawings, fig. 1 and 2 show schematic views of installation angle deviation of a nozzle, and fig. 4-5, 7-8 and 10-11 show schematic views of position deviation of the nozzle in the pouring use process and corresponding parameters in the calculation process;
in the drawings, the components represented by the respective reference numerals are listed below:
1-photo frame, 2-steel ladle, 3-steel ladle-tundish long nozzle, 4-installation deviation angle, 5-tundish, 6-tundish-crystallizer long nozzle, 7-crystallizer, 8-crystallizer rectangular cover plate and 9-crystallizer rectangular cover plate edge.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1-2, the present invention is a method for implementing a measurement and calibration system for a continuous casting nozzle, wherein the measurement and calibration system includes a continuous casting nozzle imaging device, a nozzle photo analysis computer and program, and an analysis result feedback and prompt system.
Manually focusing and triggering a continuous casting nozzle imaging device which is placed at a distance of 2000 ten thousand pixels (10 m) away from a single initially-installed ladle-tundish nozzle, has the exposure time of 1/80 seconds, the focusing range of 1-20m and a gravity direction indicating line arranged in front of a lens, shooting a ladle-tundish nozzle outline image and automatically storing the image;
and then the continuous casting nozzle imaging device is rotated by 90 degrees by taking the central point of the tundish or the axial lead of the nozzle as the center of a circle, and then a second picture is taken.
Starting a nozzle photo analysis computer and a program, selecting a nozzle installation analysis mode, automatically calling an angle deviation analysis module in the mode, calling a selected photo containing a nozzle, identifying the external outline of the nozzle, drawing lines at equal intervals according to the height 1/10 of the photo in sequence along the parallel line of the bottom line of the photo, calculating the intersection line segment of the drawn lines and the external outline of the nozzle, connecting the midpoints of the intersection line segments, performing simulation processing according to the fact that the regression model error accounts for more than or equal to 80% of the total error percentage R-sq, calculating the included angle between the simulation processed straight line and a gravity direction indicating line (vertical line), prompting the nozzle to rotate in the axial direction and the angle perpendicular to the opposite shooting direction according to the included angle condition, and outputting the rotation direction and angle data to a prompting system with analysis result feedback and voice broadcast.
Example two
Referring to fig. 1-2, the present invention is a method for implementing a measurement and calibration system for a continuous casting nozzle, wherein the measurement and calibration system includes a continuous casting nozzle imaging device, a nozzle photo analysis computer and program, and an analysis result feedback and prompt system.
Manually focusing and triggering a continuous casting nozzle imaging device which is placed at a distance of 1000 ten thousand pixels 5m away from a single initially-installed tundish-crystallizer submerged nozzle, has the exposure time of 1/60 seconds, the focusing range of 1-20m and a gravity direction indicating line arranged in front of a lens, shooting a tundish-crystallizer submerged nozzle outline image and automatically storing the image;
and then the continuous casting nozzle imaging device is rotated by 90 degrees by taking the central point of the tundish or the axial lead of the nozzle as the center of a circle, and then a second picture is taken.
Starting a water gap photo analysis computer and a program, selecting a water gap installation analysis mode, automatically calling an angle deviation analysis module in the mode, calling a selected photo containing a water gap, identifying the external outline of the water gap, drawing lines at equal intervals according to the photo height 1/100 along a parallel line of a bottom line of the photo, calculating an intersecting line segment of the drawn lines and the external outline of the water gap, connecting the midpoints of the intersecting line segments, performing simulation processing into straight lines according to the fact that the regression model error accounts for more than or equal to 80% of the total error percentage R-sq, calculating the included angle between the simulation processed straight lines and a gravity direction indicating line (vertical line), prompting that the water gap should rotate in the axial direction and the angle perpendicular to the shooting right opposite side according to the included angle, and outputting the rotation direction and angle data to a prompting system with analysis result feedback and display and sound broadcasting.
The other steps are the same as those of the first embodiment.
EXAMPLE III
The invention relates to a method for realizing a continuous casting nozzle installation measurement calibration system, which comprises a continuous casting nozzle imaging device, a nozzle photo analysis computer, a program and an analysis result feedback and prompt system.
Manually focusing and triggering a continuous casting nozzle imaging device which is placed at a distance of 1600 ten thousand pixels with a minimum distance of 1m and a maximum distance of 15m from 3 initially installed tundish-crystallizer submerged nozzles, has an exposure time of 1/100 seconds, a focusing range of 1-20m and a gravity direction indicating line arranged in front of a lens, shooting a tundish-crystallizer submerged nozzle outline image and automatically storing the image;
and then the continuous casting nozzle imaging device is rotated by 90 degrees by taking the central point of the tundish or the axial lead of the nozzle as the center of a circle, and then a second picture is taken.
Starting a nozzle photo analysis computer and a program, selecting a nozzle installation analysis mode, automatically calling an angle deviation analysis module in the mode, calling a selected photo containing a nozzle, identifying the external outline of 3 nozzles (respectively numbered), drawing lines at equal intervals according to the picture height 1/100 along the parallel line of the bottom line of the picture in sequence, calculating the respective intersecting line segments of the drawn lines and the external outlines of the 3 water gaps, connecting the midpoints of the intersecting line segments, simulating and processing the regression model error into a straight line according to the fact that the regression model error accounts for more than or equal to 80 percent of the total error percentage R-sq, calculating an included angle between the simulated and processed straight line and a gravity direction indicating line (vertical line), according to the included angle, 3 water gaps with corresponding numbers are prompted to respectively rotate along the axial direction and the angle which are perpendicular to the opposite surfaces of the shot, and the data of the rotating direction and the angle are output to a prompt system with analysis result feedback and display.
The other steps are the same as those in the first embodiment.
Example four
The invention relates to a method for realizing a continuous casting nozzle installation measurement calibration system, which comprises a continuous casting nozzle imaging device, a nozzle photo analysis computer, a program and an analysis result feedback and prompt system.
Manually focusing and triggering a continuous casting nozzle imaging device which is placed at a distance of 2000 ten thousand pixels (10 m) away from a single ladle-tundish nozzle used in pouring, has an exposure time of 1/80 seconds, a focusing range of 1-20m, and is provided with a strong light filter and a gravity direction indicating line in front of a lens, shooting a ladle-tundish nozzle outline image, and automatically storing an image;
and then the continuous casting nozzle imaging device is rotated by 90 degrees by taking the central point of the tundish or the axial lead of the nozzle as the center of a circle, and then a second picture is taken.
Starting a nozzle photo analysis computer and a program, selecting a nozzle installation analysis mode, automatically calling an angle deviation analysis module in the mode, calling a selected photo containing a nozzle, identifying the external outline of the nozzle, drawing lines at equal intervals according to the height 1/80 of the photo in sequence along the parallel line of the bottom line of the photo, calculating the intersection line segment of the drawn lines and the external outline of the nozzle, connecting the midpoints of the intersection line segments, performing simulation processing according to the fact that the regression model error accounts for more than or equal to 80% of the total error percentage R-sq, calculating the included angle between the simulation processed straight line and a gravity direction indicating line (vertical line), prompting the nozzle to rotate in the axial direction and the angle perpendicular to the opposite shooting direction according to the included angle condition, and outputting the rotation direction and angle data to a prompting system with analysis result feedback and display and voice broadcast.
The other steps are the same as those of the first embodiment.
EXAMPLE five
Referring to fig. 3-5, the present invention is a method for implementing a measurement and calibration system for a continuous casting nozzle, where the measurement and calibration system includes a continuous casting nozzle imaging device, a nozzle photo analysis computer and program, and an analysis result feedback and prompt system.
The method comprises the steps of manually focusing and triggering a continuous casting nozzle imaging device which is placed at a distance of 2000 ten thousand pixels (8 m) away from a tundish-circular crystallizer submerged nozzle used in pouring, has an exposure time of 1/80 seconds and a focusing range of 1-20m and is provided with a gravity direction indicating line in front of a lens, shooting images of the tundish-crystallizer submerged nozzle, the crystallizer and the rectangular cover plate edge of the crystallizer, and automatically storing the images.
Starting a nozzle photo analysis computer and a program, selecting a nozzle use analysis mode, and automatically calling an angle deviation analysis module and a position deviation analysis module to perform the following analysis:
calling the shot picture, recognizing the outer contour of the water gap, drawing lines at equal intervals according to the picture height 1/100 along the parallel line of the bottom line of the picture, calculating the intersection line segment of the drawn lines and the outer contour of the water gap, connecting the midpoints of the intersection line segments, performing simulation processing into a straight line according to the fact that the regression model error accounts for more than or equal to 80% of the total error percentage R-sq, calculating the included angle between the simulation processing straight line and a gravity direction indicating line (vertical line), and prompting the water gap to rotate along the axial direction and the angle perpendicular to the opposite side of the shot according to the included angle.
Calling the shot picture, identifying the ellipse of the liquid level of the casting powder in the crystallizer, and calculating the ellipse
Center of circle position O 1 Length of two polar axes l x1 (major axis) and y1 (minor axis) and the angle alpha between the major axis of the ellipse and the edge of the rectangular cover plate (hereinafter referred to as "edge 1") of the crystallizer 1 ；
The outer diameter of the submerged nozzle of the crystallizer is dn, the diameter of the cross section of the round billet crystallizer is d, and the nozzle of the crystallizer is close to O 1 The distance vector from the side edge point to the minor axis of the ellipse is l x1 ', the water port of the crystallizer is close to O 1 The distance vector from the side edge point to the major axis of the ellipse is l y1 ’；
Calculating the deviation distance j of the edge 1 direction x ＝l x1 ’·d/(l x1 ·cosα 1 ) + dn/2, deviation distance j perpendicular to the edge direction of the rectangular cover plate of the crystallizer y ＝l y1 ’·d/(l y1 ·cosα 1 )+dn/2。
And outputting the calculated rotating direction, angle data and position deviation distance data of the water gap to an analysis result feedback and prompting system with display and sound broadcasting.
EXAMPLE six
Referring to fig. 6-8, the present invention is a method for implementing a measurement and calibration system for a continuous casting nozzle, where the measurement and calibration system includes a continuous casting nozzle imaging device, a nozzle photo analysis computer and program, and an analysis result feedback and prompt system.
The method comprises the steps of manually focusing and triggering a continuous casting nozzle imaging device which is placed at a distance of 2000 ten thousand pixels (5 m) away from a tundish-rectangular crystallizer submerged nozzle used in pouring, has an exposure time of 1/100 seconds, a focusing range of 1-20m and is provided with a gravity direction indicating line in front of a lens, shooting images of the tundish-crystallizer submerged nozzle, the crystallizer and the rectangular cover plate edge of the crystallizer, and automatically storing the images.
Starting a nozzle photo analysis computer and a program, selecting a nozzle use analysis mode, and automatically calling an angle deviation analysis module and a position deviation analysis module to perform the following analysis:
calling the shot picture, recognizing the outer contour of the water gap, drawing lines at equal intervals according to the picture height 1/100 along the parallel line of the bottom line of the picture, calculating the intersection line segment of the drawn lines and the outer contour of the water gap, connecting the midpoints of the intersection line segments, performing simulation processing into a straight line according to the fact that the regression model error accounts for more than or equal to 80% of the total error percentage R-sq, calculating the included angle between the simulation processing straight line and a gravity direction indicating line (vertical line), and prompting the water gap to rotate along the axial direction and the angle perpendicular to the opposite side of the shot according to the included angle.
Calling the shot picture, identifying the quadrangle of the casting protective slag surface in the crystallizer, and calculating the intersection point O of the diagonals of the quadrangle 2 Identifying or calculating the edge length l of the rectangular cover plate edge (hereinafter referred to as "edge 2") of the crystallizer close to the bottom of the photo x2 And the included angle alpha between the bottom line of the photo and the bottom line of the photo 2 The angle alpha between the edge 2 and the bottom line of the picture 2 ' side length l intersecting with the edge of the rectangular cover plate of the crystallizer y2 And the included angle beta between the angle beta and the vertical line of the bottom line of the photo 2 ；
The outer diameter dn of the submerged nozzle of the crystallizer, and the side length l of the rectangular crystallizer parallel to the corresponding rectangular cover plate edge of the crystallizer x20 The length of the side of the rectangular crystallizer vertical to the corresponding rectangular cover plate edge of the crystallizer y20 The water gap of the crystallizer is close to O 2 Side edge point to pass O 2 And the distance perpendicular to the bottom line of the picture is l x2 ', the water port of the crystallizer is close to O 2 Side pass through O 2 And the distance perpendicular to the bottom line of the picture is l y2 ’；
Calculating the deviation distance j in the direction of the edge 2 x ＝l x2 ’·l x20 /(l x2 ·cosα 2 ') + dn/2, offset distance j in the direction perpendicular to edge 2 y ＝l y2 ’·l y20 /(l y2 ·cos(β 2 +(α 2 ’-α 2 ))+dn/2；
And outputting the calculated rotating direction, angle data and position deviation distance data of the water gap to an analysis result feedback and prompting system with display and sound broadcasting.
The rest is the same as the fifth embodiment.
EXAMPLE seven
Referring to fig. 9-11, the present invention is a method for implementing a measurement and calibration system for a continuous casting nozzle, where the measurement and calibration system includes a continuous casting nozzle imaging device, a nozzle photo analysis computer and program, and an analysis result feedback and prompt system.
The method comprises the steps of manually focusing and triggering a continuous casting nozzle imaging device which is placed at a distance of 2000 ten thousand pixels (5 m) away from a tundish-polygonal crystallizer submerged nozzle used in pouring, has an exposure time of 1/100 seconds, a focusing range of 1-20m and is provided with a gravity direction indicating line in front of a lens, shooting images of the tundish-crystallizer submerged nozzle, a crystallizer and a crystallizer rectangular cover plate edge, and automatically storing the images.
Starting a nozzle photo analysis computer and a program, selecting a nozzle use analysis mode, and automatically calling an angle deviation analysis module and a position deviation analysis module to perform the following analysis:
calling the shot picture, recognizing the outer contour of the nozzle, drawing lines at equal intervals according to the picture height 1/100 along the parallel line of the bottom line of the picture in sequence, calculating the intersecting line segment of the drawn lines and the outer contour of the nozzle, connecting the midpoints of the intersecting line segments, performing simulation treatment on the straight lines according to the fact that the regression model error accounts for more than or equal to 80% of the total error percentage R-sq, calculating the included angle between the simulation treated straight lines and the gravity direction indicating line (vertical line), and prompting the nozzle to rotate in the axial direction and the angle perpendicular to the opposite direction of the shot according to the included angle.
Calling the shot picture, identifying the polygon of the surface of the casting protective slag in the crystallizer, and calculating the geometric center O of the polygon 3 (even side is O) 3 Is a diagonal point, and the odd side is O 3 Is the intersection point of two or more (the corner point is connected with the midpoint of the corresponding opposite side), and the edge length l with the minimum included angle with the edge (hereinafter referred to as the edge 3) of the rectangular cover plate of the crystallizer close to the bottom of the picture x3 And the included angle alpha between the bottom line of the photo and the bottom line of the photo 3 And the angle alpha between the edge 3 and the bottom line of the picture 3 ', the length l of the adjacent side of the side with the smallest angle with the side 3 y3 And the included angle beta between the angle beta and the vertical line of the bottom line of the picture 3 ；
The outer diameter dn of the submerged nozzle of the crystallizer, and the side length l of the side with the minimum included angle between the polygonal crystallizer and the side 3 x30 Length l of the adjacent side of the side having the smallest angle with side 3 y30 The side (l) of the side having the smallest angle with the side 3 x30 ) And its adjacent side (l) y30 ) The original included angle is n3, and the water gap of the crystallizer is close to O 3 Side edge point to pass O 3 And the distance perpendicular to the bottom line of the picture is l x3 ', the water port of the crystallizer is close to O 3 Side pass through O 3 And the distance perpendicular to the bottom line of the picture is l y3 ’；
Calculating the deviation distance j in the direction of the edge 3 x ＝l x3 ’·l x30 /(l x3 ·cosα 3 ) + dn/2, offset distance j perpendicular to edge 3 y ＝l y3 ’·l y30 ·sin n3/(l y3 ·cosα 3 ·(cosα 3 ·cos(β 3 +(α 3 ’-α 3 ))+sinα 3 ·sin(β 3 +(α 3 ’-α 3 )))+dn/2。
And outputting the calculated rotating direction, angle data and position deviation distance data of the water gap to an analysis result feedback and prompting system with display and sound broadcasting.
The rest is the same as the fifth embodiment.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. An implementation method of a continuous casting nozzle installation measurement calibration system is characterized in that: the measurement and calibration system comprises a continuous casting nozzle imaging device, a nozzle photo analysis computer and program, and an analysis result feedback and prompt system;
the implementation method of the measurement calibration system comprises the following steps: taking a picture of the water gap state through the continuous casting water gap imaging device and sending the picture to a water gap picture analysis computer for storage;
and analyzing the state of the water gap by using a water gap photo analysis program, and prompting the installation and adjustment of the water gap through a feedback and prompt system after an analysis result is compared with a standard target.
2. The method for implementing the measurement and calibration system for the installation of the continuous casting nozzle in the claim 1 is characterized in that the measurement and calibration system is applied to the simultaneous measurement and calibration of the ladle-tundish long nozzle or the tundish-crystallizer submerged nozzle or a single nozzle or a plurality of nozzles.
3. The method for realizing the continuous casting nozzle installation measurement calibration system according to claim 1, wherein the measurement calibration system is applied to nozzle installation measurement calibration for continuous casting of round billet crystallizers, rectangular billet crystallizers and polygonal crystallizers.
4. The method for realizing the system for installing, measuring and calibrating the continuous casting nozzle according to claim 1, wherein the pixels of the continuous casting nozzle imaging device are more than or equal to 1000 ten thousand, the exposure time is less than or equal to 1/60 seconds, the focusing range is 1-20m, a strong light filter can be not added or added, and a gravity direction indicating line is arranged in front of a lens;
and shooting the outline image of the initially installed ladle-tundish long nozzle or tundish-crystallizer immersed nozzle, or the image of the ladle-tundish long nozzle or the image of the edge of the rectangular cover plate comprising the tundish-crystallizer immersed nozzle, the crystallizer and the crystallizer in the use process by manually focusing and triggering an imaging system, and automatically storing the image.
5. The method for implementing the system for installation, measurement and calibration of the continuous casting nozzle according to claim 1, wherein the nozzle photo analysis computer and the program are divided into an angle deviation analysis module and a position deviation analysis module according to functions;
dividing the analysis stage into a nozzle installation analysis mode and a nozzle use analysis mode;
in a nozzle installation and analysis mode, a first vertical plane which needs to pass through the center line of a nozzle and is not horizontal with a tundish is shot, a picture is shot by a shooting point in the height range of the nozzle, then a second picture is shot by rotating counterclockwise or clockwise by 90 degrees by taking the shooting point of the first picture as a reference along the vertical line of the connecting point of the nozzle and the bottom of the tundish as an axis, and the second shooting point is also in the height range of the nozzle;
in the analysis mode of the water gap, a point which is not on the vertical plane of the central line of the water gap and the side line of the crystallizer and has the same height with a certain point in the height range of the water gap is needed to take a picture.
6. The method of claim 5, wherein the angular deviation analysis module comprises the steps of:
step 1: calling a selected photo containing the water gap, identifying the external outline of the water gap, drawing lines at equal intervals according to the photo height 1/100-1/10 along a parallel line of a bottom line of the photo in sequence, calculating an intersecting line segment of the drawn lines and the external outline of the water gap, connecting midpoints of the intersecting line segments, simulating and processing the intersecting line segment into a straight line according to the fact that the regression model error accounts for more than or equal to 80% of the total error percentage R-sq, and defining a positive angle as an anticlockwise included angle of the right photo and a negative angle as a clockwise angle;
step 2: in the water gap installation analysis mode, reading an included angle between a straight line of a midpoint connecting line of the analog processing water gap and a gravity direction indicating line (vertical line) according to pictures shot at two angles, prompting the water gap to follow a rotating direction and an angle which are perpendicular to the shot right opposite according to the included angle, namely the rotating direction and the angle required by the straight line of the midpoint connecting line of the water gap returning to zero, and outputting the rotating direction and the angle data to an analysis result feedback and prompting system;
and step 3: the height of the nozzle from the lower surface of the tundish to the casting surface of the crystallizer is L in an analysis mode of nozzle use N Then calculating respective distance deviation j of two vertical directions X and Y according to the picture x And j y Calculating deviation angles of respective directions, wherein the deviation angle theta of the X direction x ’＝arctg(j x /L N ) Angle of deviation in Y direction theta y ’＝arctg(j y /L N )。
7. The method of claim 6, wherein the position deviation analysis module calls a selected photograph containing a tundish-crystallizer submerged nozzle and a crystallizer;
for a circular crystallizer:
1) identifying the ellipse of the liquid level of the casting powder in the crystallizer and calculating the center position O of the ellipse 1 Length of two polar axes l x1 (major axis) and y1 (minor axis) and the angle alpha between the major axis of the ellipse and the edge of the rectangular cover plate (hereinafter referred to as "edge 1") of the crystallizer 1 ；
2) The outer diameter of the submerged nozzle of the crystallizer is dn, the diameter of the cross section of the round billet crystallizer is d, and the water port of the crystallizer is close to O 1 The distance vector from the side edge point to the minor axis of the ellipse is l x1 ', the water port of the crystallizer is close to O 1 The distance vector from the side edge point to the major axis of the ellipse is l y1 ’；
3) Deviation distance j in the edge 1 direction x ＝l x1 ’·d/(l x1 ·cosα 1 ) + dn/2, deviation distance j perpendicular to the edge direction of the rectangular cover plate of the crystallizer y ＝l y1 ’·d/(l y1 ·cosα 1 )+dn/2；
For a rectangular crystallizer:
1) identifying quadrangle of casting protecting slag surface in crystallizer, and calculating intersection point O of diagonal lines of quadrangle 2 Identifying or calculating the edge length l of the rectangular cover plate edge (hereinafter referred to as "edge 2") of the crystallizer close to the bottom of the photo x2 And the included angle alpha between the included angle alpha and the bottom line of the photo 2 The angle alpha between the edge 2 and the bottom line of the picture 2 ' side length l intersecting with the edge of the rectangular cover plate of the crystallizer y2 And the included angle beta between the angle beta and the vertical line of the bottom line of the picture 2 ；
2) The outer diameter dn of the submerged nozzle of the crystallizer, and the side length l of the rectangular crystallizer parallel to the corresponding rectangular cover plate edge of the crystallizer x20 The length of the side of the rectangular crystallizer vertical to the corresponding rectangular cover plate edge of the crystallizer y20 The water gap of the crystallizer is close to O 2 Side edge point to pass O 2 And the distance perpendicular to the bottom line of the picture is l x2 ', the water port of the crystallizer is close to O 2 Side pass through O 2 And the distance perpendicular to the bottom line of the picture is l y2 ’；
3) Deviation distance j in the direction of edge 2 x ＝l x2 ’·l x20 /(l x2 ·cosα 2 ') + dn/2, offset distance j in the direction perpendicular to edge 2 y ＝l y2 ’·l y20 /(l y2 ·cos(β 2 +(α 2 ’-α 2 ))+dn/2；
For a polygonal crystallizer:
1) identifying the polygon of the casting protective slag surface in the crystallizer, and calculating the geometric center O of the polygon 3 (even side is O) 3 Is a diagonal point, and the odd side is O 3 Two or more than two(the intersection point of the angular point and the midpoint connecting line of the corresponding opposite side), and the edge length l with the minimum included angle with the edge (hereinafter referred to as the edge 3) of the rectangular cover plate of the crystallizer close to the bottom of the photo x3 And the included angle alpha between the bottom line of the photo and the bottom line of the photo 3 And the angle alpha between the edge 3 and the bottom line of the picture 3 ', the length l of the adjacent side of the side with the smallest angle with the side 3 y3 And the included angle beta between the angle beta and the vertical line of the bottom line of the picture 3 ；
2) The outer diameter dn of the submerged nozzle of the crystallizer, and the side length l of the side with the minimum included angle between the polygonal crystallizer and the side 3 x30 The length l of the adjacent side of the side having the smallest angle with the side 3 y30 The edge (l) of the edge having the smallest angle with the edge 3 x30 ) And its adjacent side (l) y30 ) The original included angle is n3, and the water gap of the crystallizer is close to O 3 Side edge point to pass O 3 And the distance perpendicular to the bottom line of the picture is l x3 ', the water port of the crystallizer is close to O 3 Side pass through O 3 And the distance perpendicular to the bottom line of the picture is l y3 ’；
3) Offset distance j in the direction of edge 3 x ＝l x3 ’·l x30 /(l x3 ·cosα 3 ) + dn/2, offset distance j perpendicular to edge 3 y ＝l y3 ’·l y30 ·sin n3/(l y3 ·cosα 3 ·(cosα 3 ·cos(β 3 +(α 3 ’-α 3 ))+sinα 3 ·sin(β 3 +(α 3 ’-α 3 )))+dn/2。
8. The method of claim 5, wherein the nozzle mount analysis mode invokes an angular deviation analysis module.
9. The method of claim 5, wherein the nozzle uses an analysis mode to invoke an angular deviation analysis module and a positional deviation analysis module.
10. The method of claim 1, wherein the feedback and prompt system is one or both of a nozzle offset correction mode and a correction value result display and voice broadcast.
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