Device and method for measuring back taper of continuous casting crystallizer

Abstract

The invention relates to the technical field of continuous casting crystallizer back taper measurement, in particular to a continuous casting crystallizer back taper measuring device and method.The continuous casting crystallizer back taper measuring device comprises a base, a laser range finder, a moving assembly and a fixing seat, and the fixing seat is used for fixing the laser range finder; the moving assembly is arranged on the base and used for limiting the moving direction of the fixing base in the transverse direction, the longitudinal direction and the vertical direction. The method has the effect of improving the measurement precision.

Description

Technical Field

[0001] The present application relates to the technical field of measuring the back taper of a continuous casting crystallizer, and in particular to a device and method for measuring the back taper of a continuous casting crystallizer. Background Art

[0002] The continuous casting mold is a key equipment in the continuous casting production of steel. Its main function is to ensure the smooth forming of the ingot by designing the shape of the inner wall of the crystallizer during the solidification of molten steel. The inverted taper of the crystallizer directly affects the quality of the ingot. If the taper is too large, it may cause cracks on the surface of the ingot, and if the taper is too small, it may cause steel leakage from the ingot. Therefore, accurate measurement and control of the inverted taper of the crystallizer is crucial to improving the quality of the ingot and production efficiency. Although the traditional measurement method has met the production needs to a certain extent, it is difficult to adapt to the modern efficient and precise continuous casting production process due to the limitations of measurement accuracy and efficiency.

[0003] The measurement methods in the related art mainly include the use of an internal diameter micrometer and a taper measuring instrument. The internal diameter micrometer is mainly used to measure the opening width of the crystallizer, while the taper measuring instrument is used to determine the inverted taper angle. Although these methods are simple and easy to use, they have the problem that the reading process is not intuitive enough and the measurement efficiency is low. For example, the internal diameter micrometer requires manual measurement, which is not only time-consuming and laborious, but also the measurement accuracy is greatly affected by human factors. Although the taper measuring instrument improves the measurement accuracy, it still has some limitations, such as large equipment size, complex operation, and inability to detect the inverted taper of the crystallizer with a variable slope. In addition, the measurement methods in the related art can only provide information on the overall taper, and cannot reveal the specific situation of the unilateral taper in detail, which limits the ability to accurately adjust the crystallizer. Secondly, although the measuring head adopts a sphere or spherical design, its contact with the surface of the crystallizer during longitudinal movement may still cause wear and scratches.

[0004] In summary, the measurement methods and equipment in the relevant technology have many shortcomings in accurately measuring the taper of the continuous casting crystallizer, especially the low measurement accuracy, complicated operation, and unstable equipment. These problems seriously affect the precise adjustment of the crystallizer and the control of the quality of the casting. Summary of the invention

[0005] In order to improve the measurement accuracy and protect the crystallizer from damage, the present application provides a continuous casting crystallizer back taper measurement device and method.

[0006] In the first aspect, the present application provides a device for measuring the back taper of a continuous casting crystallizer, which adopts the following technical solution: a device for measuring the back taper of a continuous casting crystallizer, comprising a base, a laser rangefinder, a movable component and a fixed seat, wherein the fixed seat is used to fix the laser rangefinder, and the movable component is arranged on the base, and is used to limit the movement direction of the fixed seat in the horizontal, longitudinal and vertical directions.

[0007] By adopting the above technical solution, the combined design of the base, laser rangefinder, mobile assembly and fixed seat enables the laser rangefinder to move freely in multiple dimensions, ensuring that it can be accurately placed at different measurement positions on the inner wall of the crystallizer. In addition, the design of the fixed seat ensures the stable installation of the laser rangefinder and improves the stability of the measurement. The device is not only suitable for square and round billet continuous casting crystallizers, but also can maintain high measurement accuracy in different environments, thereby providing reliable data support for the quality control of the crystallizer.

[0008] Optionally, the moving component includes two transverse linear rails, the transverse linear rails are fixedly connected to the base through a column, and the two transverse linear rails are arranged parallel to each other and spaced apart; a longitudinal linear rail, the longitudinal linear rail is simultaneously slidably connected to the two transverse linear rails; and a vertical telescopic rod, the top end of the vertical telescopic rod is slidably connected to the longitudinal linear rail through a sliding seat, and the bottom end of the vertical telescopic rod is fixedly connected to the fixed seat.

[0009] By adopting the above technical solution, the mobile assembly can achieve precise movement in three directions, namely horizontally, vertically and longitudinally. Specifically, the combination of the horizontal linear track and the longitudinal linear track allows the laser rangefinder to move freely on the horizontal plane, ensuring that it can perform accurate measurements at different positions of the crystallizer. The design of the vertical telescopic rod allows the laser rangefinder to be adjusted in height in the vertical direction to meet the measurement requirements of different depths. This multi-dimensional precise movement capability not only improves the flexibility of measurement, but also significantly improves the accuracy and reliability of measurement.

[0010] Optionally, the transverse linear track, the longitudinal linear track and the vertical telescopic rod are all provided with scales.

[0011] By adopting the above technical solution, the scale not only makes it easy for operators to intuitively read the displacement in each direction, but also makes it easier to achieve precise positioning when performing multiple measurements at different positions, further improving the reliability of the measurement results.

[0012] Optionally, it also includes a distance measuring switch, which is arranged on the top of the sliding seat and is connected to the laser rangefinder signal.

[0013] By adopting the above technical solution, the setting of the distance measuring switch enables the operator to conveniently control the measuring operation of the distance measuring instrument without touching the laser distance measuring instrument, thereby improving the convenience and accuracy of the measurement.

[0014] Optionally, it also includes a positioning component, which includes a transverse positioning rail, a positioning slider and a bidirectional screw. The number of the transverse positioning rails and the positioning slider is two. The transverse positioning rail is fixedly connected to the base. The two transverse positioning rails are arranged parallel to each other and spaced apart. The positioning slider is simultaneously slidably connected to the two transverse positioning rails. The positioning slider is provided with a screw hole, and the two threaded sections of the bidirectional screw are respectively threadedly connected to the positioning slider.

[0015] By adopting the above technical solution, the two positioning sliders can move synchronously under the action of the bidirectional screw. The synchronous movement ensures that the movement of the positioning slider on the lateral positioning track is consistent. The synchronously moving positioning slider can move the positioned crystallizer so that the center of the positioned crystallizer matches the center of the bidirectional screw. After moving into place, the synchronous movement ensures that the two positioning sliders apply force evenly, avoiding tilting or offset caused by excessive force on one side.

[0016] Optionally, an adjusting ratchet is provided at the intersection of two opposite threaded sections of the bidirectional screw, an avoidance hole for the adjusting ratchet to pass through is provided on the base, and a ratchet pawl cooperating with the adjusting ratchet is provided at the bottom of the base.

[0017] By adopting the above technical solution, the design of the adjusting ratchet wheel makes it easier for operators to adjust the bidirectional screw. The coordination between the adjusting ratchet wheel and the pawl ensures that the bidirectional screw will not rotate in the opposite direction due to accidental touch after being adjusted into place, thereby causing the coordination to fail, thus ensuring the reliability of the positioning assembly.

[0018] Optionally, the positioning assembly further includes a turntable, which is rotatably disposed on the base around its own axis, the intersection of two opposite thread segments of the bidirectional screw is located at the central axis of the turntable, and the turntable is used to place the crystallizer.

[0019] By adopting the above technical solution, the design of the turntable enables the crystallizer to be easily rotated during the measurement process, thereby facilitating multi-angle measurement at different positions. On the other hand, the design of the central axis position of the turntable enables the positioning assembly to more conveniently rotate the crystallizer, further improving the convenience of measurement.

[0020] Optionally, a soft positioning edge is provided on the side of the positioning slide blocks that is away from each other.

[0021] By adopting the above technical solution, when the crystallizer is a square billet crystallizer, the positioning edge can cooperate with the inner surface of the crystallizer, so that two of the four inner surfaces are opposite to each other in the horizontal direction, and the other two are opposite to each other in the vertical direction, so that it is convenient for the mobile component to move the laser rangefinder, and the positional relationship between the laser rangefinder and the crystallizer can be grasped through the scale. When the crystallizer is a round billet crystallizer, the two corners of each positioning edge, a total of four corners, can cooperate with the inner surface of the crystallizer, so that the center of the quadrilateral formed by the four corners is coincident with the center of the crystallizer, and the center of the crystallizer is maintained at the rotation center of the turntable, so that it is convenient for the mobile component to move the laser rangefinder, and the positional relationship between the laser rangefinder and the crystallizer can be grasped through the scale.

[0022] Optionally, the laser rangefinder complies with the GB / T 14267-2009 Photoelectric Rangefinder standard and has an environmental factor correction function.

[0023] By adopting the above technical solution, the accuracy and reliability of the measurement are ensured, so that the laser rangefinder can perform accurate measurements under different temperature, air pressure and humidity conditions, effectively eliminating the impact of environmental changes on the measurement results, and improving the accuracy and consistency of the measurement.

[0024] In a second aspect, the present application provides a method for measuring the inverted taper of a continuous casting mold, which adopts the following technical solution: A method for measuring the back taper of a continuous casting crystallizer comprises the following steps: S1, placing the crystallizer to be measured on the continuous casting crystallizer back taper measuring device and adjusting its position; S2, move the laser rangefinder to the upper opening of the crystallizer to ensure that its non-emitting end is in close contact with the inner wall of the crystallizer; S3, start the laser rangefinder, use the laser rangefinder to emit laser pulses and receive reflected light, and automatically calculate and display the measurement results; S4, move the laser rangefinder to the lower opening of the crystallizer to ensure that its non-emitting end is in close contact with the inner wall of the crystallizer; S5, start the laser rangefinder, use the laser rangefinder to emit laser pulses and receive reflected light, and automatically calculate and display the measurement results; S6, calculate the inverted taper of the crystallizer using the following formula: Where S t is the length of the upper side of the crystallizer, in mm, When the crystallizer is a billet crystallizer, S b For S t The length of the lower edge of the same surface, in mm, When the crystallizer is a round billet crystallizer, S bis the length of the lower opening in the same radial direction as St, in mm. L is the length of the crystallizer, in m; S7, perform multiple measurements on different planes or radial directions and take the average value as the final result; S8, recording the measurement results in a dedicated measurement record sheet, and performing data analysis to determine whether the inverted taper of the crystallizer meets the design requirements; S9, record the measurement and adjustment results in the maintenance log to facilitate tracking the performance and maintenance history of the crystallizer.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. By using laser ranging and a mobile component with a scale, the inner wall data of the continuous casting mold can be accurately measured to ensure that the measurement accuracy is controlled within ±1.5mm, solving the problem of insufficient measurement accuracy in related technologies; 2. The laser rangefinder has the function of correcting environmental factors, which can accurately measure in different environments, improve the reliability and accuracy of the measurement, and avoid measurement errors caused by environmental changes; 3. Multiple measurements at different positions and averaging the results further improves the accuracy of the measurements, ensures precise control of the mold taper, helps optimize the cooling of the ingot and prevents the formation of air gaps, thereby improving the overall quality of the ingot. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of a continuous casting crystallizer taper measuring device provided in an embodiment of the present application.

[0027] Figure 2 It is a structural schematic diagram of another angle of the continuous casting crystallizer taper measurement device provided in an embodiment of the present application.

[0028] Explanation of the reference numerals: 1-base; 101-avoidance hole; 2-laser rangefinder; 3-moving assembly; 301-horizontal linear track; 302-column; 303-longitudinal linear track; 304-sliding seat; 305-vertical telescopic rod; 4-fixed seat; 5-distance measuring switch; 6-positioning assembly; 601-horizontal positioning track; 602-positioning slider; 603-bidirectional screw; 604-adjusting ratchet; 605-pawl; 606-soft positioning edge; 7-turntable. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-2 This application is described in further detail.

[0030] The embodiment of the present application discloses a device for measuring the back taper of a continuous casting crystallizer.

[0031] like Figure 1 As shown, the continuous casting mold back taper measuring device includes a base 1, a laser rangefinder 2, a moving component 3 and a fixed base 4. The fixed base 4 is used to fix the laser rangefinder 2 so that the laser emission direction of the laser rangefinder 2 is in the horizontal or vertical direction. The moving component 3 is arranged on the base 1 and is used to limit the moving direction of the fixed base 4 in the horizontal, vertical and vertical directions. Among them, the laser rangefinder 2 needs to comply with the "GB / T 14267-2009 Photoelectric Rangefinder" standard and have an environmental factor correction function. This ensures the accuracy and reliability of the measurement, allowing the laser rangefinder 2 to perform accurate measurements under different temperature, air pressure and humidity conditions, effectively eliminating the influence of environmental changes on the measurement results, and improving the accuracy and consistency of the measurement.

[0032] The combination of the base 1, the laser rangefinder 2, the moving assembly 3 and the fixed seat 4 enables the laser rangefinder 2 to move freely in a multi-dimensional space, ensuring that it can accurately locate each measuring point on the inner wall of the crystallizer. In addition, the structural design of the fixed seat 4 ensures the stable installation of the laser rangefinder 2, thereby improving the stability of the measurement process. The device is not only suitable for various shapes of billet continuous casting crystallizers, but also can maintain high-precision measurement performance under different environmental conditions, providing data support for the quality control of the crystallizer.

[0033] like Figure 1 As shown, the moving component 3 includes a transverse linear rail 301, the number of which is two, the transverse linear rail 301 is fixedly connected to the base 1 through a column 302, and the two transverse linear rails 301 are arranged parallel to each other and spaced apart; a longitudinal linear rail 303, the longitudinal linear rail 303 is slidably connected to the two transverse linear rails 301 at the same time; a vertical telescopic rod 305, the top end of the vertical telescopic rod 305 is slidably connected to the longitudinal linear rail 303 through a sliding seat 304, and the bottom end of the vertical telescopic rod 305 is fixedly connected to the fixed seat 4.

[0034] The mobile component 3 realizes precise displacement in three-dimensional space, specifically covering the horizontal, longitudinal and vertical dimensions. Through the combination of the horizontal linear track 301 and the longitudinal linear track 303, the laser rangefinder 2 can move freely on the horizontal plane, ensuring that it can perform precise measurement tasks at various positions of the crystallizer. At the same time, the design of the vertical telescopic rod 305 gives the laser rangefinder 2 the ability to adjust its height in the vertical direction to meet the measurement requirements of different depths. This multi-dimensional precise movement performance not only enhances the flexibility of measurement, but also significantly improves the accuracy and reliability of measurement.

[0035] In addition, in order to facilitate the operator to obtain the position information of the laser rangefinder 2, a scale is provided at the horizontal linear track 301 and the longitudinal linear track 303. The vertical telescopic rod 305 is divided into 10 sections, each section is 100 mm long, and a scale is provided at each telescopic section, so that the total adjustable length of the vertical telescopic rod 305 is 1000 mm. As a measuring tool, the scale is not only convenient for the operator to intuitively read the displacement in each dimension, but also can more effectively achieve accurate positioning when performing multiple measurements at different positions, thereby further enhancing the reliability of the measurement results.

[0036] like Figure 1 and Figure 2 As shown, the laser rangefinder 2 further includes a distance measuring switch 5, which is arranged on the top of the sliding seat 304 and is connected to the laser rangefinder 2 by signal. The arrangement of the distance measuring switch 5 enables the operator to conveniently control the measuring operation of the rangefinder without contacting the laser rangefinder 2, thereby improving the convenience and accuracy of the measurement.

[0037] like Figure 1 As shown, in order to position the crystallizer to be measured, the continuous casting crystallizer taper measuring device also includes a positioning component 6, the positioning component 6 includes a transverse positioning rail 601, a positioning slider 602 and a bidirectional screw 603, the number of the transverse positioning rail 601 and the positioning slider 602 are both two, the transverse positioning rail 601 is fixedly connected to the base 1, the two transverse positioning rails 601 are arranged parallel to each other and spaced apart, the positioning slider 602 is slidably connected to the two transverse positioning rails 601 at the same time, the positioning slider 602 is provided with a screw hole, and the two threaded sections of the bidirectional screw 603 are respectively threadedly connected to the positioning slider 602.

[0038] The two positioning sliders 602 can be synchronously moved closer or farther from each other under the drive of the bidirectional screw 603. This synchronous movement mechanism ensures that the positioning sliders 602 move consistently on the lateral positioning track 601. The synchronously moving positioning sliders 602 can achieve precise positioning of the crystallizer, so that the center of the crystallizer is precisely aligned with the center of the bidirectional screw 603. After positioning is completed, the synchronous movement mechanism ensures that the two positioning sliders 602 apply force evenly, thereby avoiding tilting or offset caused by excessive force on one side.

[0039] like Figure 1 and Figure 2As shown, an adjusting ratchet 604 is provided at the intersection of two opposite threaded sections of the bidirectional screw 603, a circumvention hole 101 is provided on the base 1 for the adjusting ratchet 604 to pass through, and a ratchet 605 is provided at the bottom of the base 1 to cooperate with the adjusting ratchet 604. By providing the adjusting ratchet 604, the operator can adjust the bidirectional screw 603 more conveniently. The precise cooperation between the adjusting ratchet 604 and the ratchet 605 ensures that the bidirectional screw 603 will not rotate in the opposite direction due to accidental contact after being adjusted to the predetermined position, thereby avoiding the problem of cooperation failure and further ensuring the reliability of the positioning assembly 6.

[0040] like Figure 1 and Figure 2 As shown, the positioning assembly 6 also includes a turntable 7, which is arranged on the base 1 through a thrust bearing so that it can rotate around its own axis. The intersection of the two opposite thread segments of the bidirectional screw 603 is located at the central axis position of the turntable 7. The turntable 7 is used to place the crystallizer. The design of the turntable 7, on the one hand, enables the crystallizer to be easily rotated during the measurement process, thereby facilitating multi-angle measurement at different positions. On the other hand, the central axis position design of the turntable 7 enables the positioning assembly 6 to more conveniently rotate the crystallizer, further improving the convenience of measurement.

[0041] like Figure 1 and Figure 2 As shown, in order to protect the inner wall of the crystallizer, a soft positioning edge 606 is provided on the side where the positioning slider 602 is away from each other. For the square billet crystallizer, the cooperation between the positioning edge and the inner surface of the crystallizer can ensure that two of the four inner surfaces are opposite to each other in the horizontal direction, and the other two are opposite to each other in the vertical direction. This structural design facilitates the mobile component 3 to operate the laser rangefinder 2 that can emit laser in the horizontal or vertical direction, and accurately grasp the relative position relationship between the laser rangefinder 2 and the crystallizer through the scale. For the round billet crystallizer, the two corners of each positioning edge, a total of four corners, cooperate with the inner surface of the crystallizer so that the center of the quadrilateral formed by the four corners coincides with the center of the crystallizer. At this time, the center of the crystallizer is consistent with the rotation center of the turntable 7, which provides convenience for the mobile component 3 to achieve accurate measurement of the position relationship between the laser rangefinder 2 and the crystallizer.

[0042] The embodiment of the present application also discloses a method for measuring the back taper of a continuous casting crystallizer.

[0043] A method for measuring the back taper of a continuous casting crystallizer comprises the following steps: S1, placing the crystallizer to be measured on the continuous casting crystallizer back taper measuring device and adjusting its position; S2, move the laser rangefinder 2 to the upper opening of the crystallizer to ensure that its non-emitting end is in close contact with the inner wall of the crystallizer; S3, start the laser rangefinder 2, use the laser rangefinder 2 to emit laser pulses and receive reflected light, and automatically calculate and display the measurement results; S4, move the laser rangefinder 2 to the lower opening of the crystallizer to ensure that its non-emitting end is in close contact with the inner wall of the crystallizer; S5, start the laser rangefinder 2, use the laser rangefinder 2 to emit laser pulses and receive reflected light, and automatically calculate and display the measurement results; S6, calculate the inverted taper of the crystallizer using the following formula: Where S t is the length of the upper side of the crystallizer, in mm, When the crystallizer is a billet crystallizer, S b For S t The length of the lower edge of the same surface, in mm, When the crystallizer is a round billet crystallizer, S b is the length of the lower opening in the same radial direction as St, in mm. L is the length of the crystallizer, in m; S7, perform multiple measurements on different planes or radial directions and take the average value as the final result; S8, recording the measurement results in a dedicated measurement record sheet, and performing data analysis to determine whether the inverted taper of the crystallizer meets the design requirements; S9, record the measurement and adjustment results in the maintenance log to facilitate tracking the performance and maintenance history of the crystallizer.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A continuous casting mold back taper measuring device, characterized in that: include: A base (1), a laser rangefinder (2), a moving assembly (3) and a fixed base (4), wherein the fixed base (4) is used to fix the laser rangefinder (2), and the moving assembly (3) is arranged on the base (1) and is used to limit the moving direction of the fixed base (4) in the lateral, longitudinal and vertical directions.

2. The continuous casting mold back taper measuring device according to claim 1, characterized in that: The moving assembly (3) comprises a transverse linear track (301), the number of the transverse linear tracks (301) is two, the transverse linear tracks (301) are fixedly connected to the base (1) via a column (302), and the two transverse linear tracks (301) are arranged parallel to each other and spaced apart; A longitudinal linear track (303), wherein the longitudinal linear track (303) is slidably connected to the two transverse linear tracks (301) at the same time; A vertical telescopic rod (305), the top end of which is slidably connected to the longitudinal linear track (303) via a sliding seat (304), and the bottom end of which is fixedly connected to the fixing seat (4).

3. The continuous casting mold back taper measuring device according to claim 2, characterized in that: The transverse linear track (301), the longitudinal linear track (303) and the vertical telescopic rod (305) are all provided with scales.

4. The continuous casting mold back taper measuring device according to claim 2, characterized in that: It also comprises a distance measuring switch (5), which is arranged on the top of the sliding seat (304) and is connected to the laser rangefinder (2) by signal.

5. The continuous casting mold back taper measuring device according to claim 1, characterized in that: The invention also comprises a positioning assembly (6), wherein the positioning assembly (6) comprises a transverse positioning rail (601), a positioning slider (602) and a bidirectional screw (603), wherein the number of the transverse positioning rail (601) and the positioning slider (602) are both two, the transverse positioning rail (601) is fixedly connected to the base (1), the two transverse positioning rails (601) are arranged parallel to each other and spaced apart, the positioning slider (602) is slidably connected to the two transverse positioning rails (601) at the same time, the positioning slider (602) is provided with a screw hole, and the two threaded sections of the bidirectional screw (603) are respectively threadedly connected to the positioning slider (602).

6. The continuous casting mold back taper measuring device according to claim 5, characterized in that: An adjusting ratchet (604) is provided at the intersection of two opposite threaded sections of the bidirectional screw (603), an avoidance hole (101) for the adjusting ratchet (604) to pass through is provided on the base (1), and a ratchet pawl (605) cooperating with the adjusting ratchet (604) is provided at the bottom of the base (1).

7. The continuous casting mold back taper measuring device according to claim 5, characterized in that: The positioning assembly (6) also includes a turntable (7), which is rotatably arranged on the base (1) around its own axis, and the intersection of the two opposite thread segments of the bidirectional screw (603) is located at the central axis of the turntable (7), and the turntable (7) is used to place the crystallizer.

8. The continuous casting mold back taper measuring device according to claim 5, characterized in that: A soft positioning edge (606) is provided on one side of the positioning slide blocks (602) that is away from each other.

9. The continuous casting mold back taper measuring device according to claim 1, characterized in that: The laser rangefinder (2) complies with the standard of "GB / T 14267-2009 Photoelectric Rangefinder" and has an environmental factor correction function.

10. A method for measuring the back taper of a continuous casting mold, characterized in that: Applicable to the continuous casting mold back taper measuring device according to any one of claims 1 to 9, the method comprising: S1, placing the crystallizer to be measured on the continuous casting crystallizer back taper measuring device and adjusting its position; S2, move the laser rangefinder (2) to the upper opening of the crystallizer, and ensure that its non-emitting end is in close contact with the inner wall of the crystallizer; S3, starting the laser rangefinder (2), using the laser rangefinder (2) to emit laser pulses and receive reflected light, and automatically calculating and displaying the measurement results; S4, moving the laser rangefinder (2) to the lower opening of the crystallizer, ensuring that the non-emitting end thereof is in close contact with the inner wall of the crystallizer; S5, starting the laser rangefinder (2), using the laser rangefinder (2) to emit laser pulses and receive reflected light, and automatically calculating and displaying the measurement results; S6, calculate the inverted taper of the crystallizer using the following formula: Where S t is the length of the upper side of the crystallizer, in mm, When the crystallizer is a billet crystallizer, S b For S t The length of the lower edge of the same surface, in mm, When the crystallizer is a round billet crystallizer, S b is the length of the lower opening in the same radial direction as St, in mm. L is the length of the crystallizer, in m; S7, perform multiple measurements on different planes or radial directions and take the average value as the final result; S8, recording the measurement results in a dedicated measurement record sheet, and performing data analysis to determine whether the inverted taper of the crystallizer meets the design requirements; S9, record the measurement and adjustment results in the maintenance log to facilitate tracking the performance and maintenance history of the crystallizer.

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