Depth measuring device for tundish molten steel

Abstract

A depth measuring device for tundish molten steel comprises a horizontal moving part, a vertical moving part, a first strip-shaped square column, a tundish bottom detecting part and a molten steel surface detecting part. The vertical moving part is arranged on the horizontal moving part; the first strip-shaped square column is arranged on the vertical moving part; and the ladle bottom detection part and the molten steel surface detection part are arranged on the first strip-shaped square column. According to the utility model, the working intensity of workers is reduced, and the efficiency and the precision of the depth measurement operation of the tundish molten steel are improved.

Description

Technical Field

[0001] This utility model relates to a depth measuring device, and more particularly to a device capable of measuring the depth of molten steel in a tundish, belonging to the technical field of molten steel depth measuring equipment. Background Technology

[0002] In continuous casting, the tundish plays a crucial role, guiding molten steel from the ladle into the crystallizer. During its use, the depth of the molten steel needs to be measured to control its consistency and prevent the protective slag covering the molten steel surface from entering the next process. Currently, there are various methods for measuring the depth of molten steel in the tundish, mainly including the rangefinder method and the metal tube method. The rangefinder method calculates the molten steel depth by measuring the distance between itself and the protective slag surface, adding the relatively constant thickness of the protective slag. The metal tube method involves manually inserting an oxygen blowing pipe into the bottom of the tundish and measuring the length of steel adhering to the pipe with a ruler to determine the molten steel level. However, in reality, the refractory bricks inside the tundish are constantly corroded. Towards the end of the tundish's lifespan, the high temperature of the molten steel reduces the thickness of the refractory bricks, making it impossible to accurately determine the remaining molten steel in the tundish solely from the molten steel level. Therefore, the above methods have significant errors. Thus, a more efficient and accurate measuring device is needed to precisely measure the depth of the molten steel in the tundish. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a depth measuring device for molten steel in a tundish. This device can not only reduce the labor intensity of workers, but also improve the efficiency and accuracy of molten steel depth measurement in a tundish.

[0004] The problem described in this utility model is solved by the following technical solution:

[0005] A depth measuring device for molten steel in a ladle includes a translation section, a vertical section, a first strip-shaped square column, a ladle bottom detection section, and a molten steel surface detection section; the vertical section is disposed on the translation section; the first strip-shaped square column is disposed on the vertical section; the ladle bottom detection section and the molten steel surface detection section are both disposed on the first strip-shaped square column.

[0006] The aforementioned depth measuring device for molten steel in a ladle includes a ladle bottom detection section comprising a long column, a cone, a guide plate, a cross plate, a first infrared rangefinder, and a first winch. The first strip-shaped square column has a hole along its length, with the opening located at the lowest end of the first strip-shaped square column. The long column is inserted into the long hole at the bottom end of the first strip-shaped square column, and the length of the long column is the same as the length of the inner hole of the first strip-shaped square column. A threaded hole is provided at the bottom end of the long column, and a threaded post is provided at the center of the end face of the cone, with the threaded post of the cone threadedly engaging with the threaded hole at the bottom end of the long column. A guide hole is provided on the top surface of the first strip-shaped square column, and the guide plate passes through the first... A guide hole at the top of the strip-shaped square column; a horizontal plate is provided at the top of the guide plate, and the bottom end of the guide plate is connected to the top surface of the long column; the first infrared rangefinder is mounted on the top of the outer wall of the first strip-shaped square column through a bracket, and its infrared emitting end points to the bottom surface of the horizontal plate, and the signal output end of the first infrared rangefinder is connected to the signal input end of the CPU; the first winch is mounted on the top of the outer wall of the first strip-shaped square column through a bracket, a round hole is provided at the center of the top surface of the first strip-shaped square column, and the end of the pull rope of the first winch passes through the round hole at the top of the first strip-shaped square column and connects to the top of the long column, and the signal input end of the first winch is connected to the signal output end of the CPU.

[0007] The aforementioned depth measuring device for molten steel in a ladle comprises a molten steel surface detection section including a second strip-shaped square column, a first connecting rod, a second connecting rod, a docking mechanism, a second infrared rangefinder, and a spring. The second strip-shaped square column is disposed on the outer wall of the first strip-shaped square column, with the centerline of the first strip-shaped square column parallel to the centerline of the second strip-shaped square column. Two elongated holes are provided along the length of the second strip-shaped square column, with the openings of the elongated holes located at the bottom end of the second strip-shaped square column. The first connecting rod and the second connecting rod are respectively inserted into different elongated holes inside the second strip-shaped square column. The docking mechanism is located at the bottom ends of the first and second connecting rods. Two circular holes are provided on the top surface of the second strip-shaped square column, and the two circular holes respectively dock with two different elongated holes. The second infrared rangefinder and the spring are located at the top ends of the inner walls of different elongated holes in the second strip-shaped square column. The infrared emitting end of the second infrared rangefinder points towards the top end of the first connecting rod. The bottom end of the spring is connected to the top end of the second connecting rod. The signal output end of the second infrared rangefinder is connected to the signal input end of the CPU.

[0008] The aforementioned depth measuring device for molten steel in a ladle includes a docking mechanism comprising a base plate, a horizontal support plate, a bottom vertical plate, a U-shaped fork, and a copper wire. The base plate is positioned between the bottom ends of the first and second connecting rods. The bottom vertical plate is positioned on the bottom surface of the base plate. The horizontal support plate is positioned at the bottom end of the outer wall of the long column. The U-shaped fork is positioned at the bottom end of the bottom vertical plate and is engaged with the outer wall of the horizontal support plate. The U-shaped fork has a through hole, and the horizontal support plate also has a round hole, with the through hole of the U-shaped fork corresponding to the round hole of the horizontal support plate. The copper wire passes through the through hole of the U-shaped fork and the round hole of the horizontal support plate, and the copper wire is wound multiple times around the through hole of the U-shaped fork and the round hole of the horizontal support plate.

[0009] The aforementioned depth measuring device for molten steel in a ladle includes a vertical movement section comprising a vertical plate, a slider, and a second winch. A slide rail is provided along the length of the end face of the vertical plate, and the slider is slidably mounted on the slide rail of the vertical plate. The second winch is located at the top of the vertical plate, and the end of its pull rope is connected to the top of the slider. The slider is connected to the outer wall of the first strip-shaped square column.

[0010] The aforementioned depth measuring device for molten steel in a ladle includes a translational section comprising a support base, an extension block, and casters; casters are provided at all four corners of the lower end face of the support base; the extension block is mounted on the support base; the bottom end of the vertical plate is mounted on the extension block; a display screen is mounted on the support base, and the signal input terminal of the display screen is connected to the signal output terminal of the CPU.

[0011] This invention uses a translational component to move the remaining parts to the side of the tundish for measurement; a vertical component allows the bottom detection component and the molten steel surface detection component to approach the protective slag of the tundish, thus facilitating subsequent operations; the bottom detection component detects the relative position of the bottom face of the tundish, and the molten steel surface detection component locates the relative position of the molten steel surface. By conversion, the distance between the bottom of the molten steel and the surface can be determined, thereby determining the depth of the molten steel. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0013] Figure 2 This is a partially enlarged structural diagram of component A of this utility model;

[0014] Figure 3 This is a partially enlarged structural diagram of the present invention, B.

[0015] The list of labels in the diagram is as follows: 1. First strip-shaped square column, 2. Long column, 3. Cone, 4. Guide plate, 5. Horizontal plate, 6. First infrared rangefinder, 7. First winch, 8. Second strip-shaped square column, 9. First connecting rod, 10. Second connecting rod, 11. Base plate, 12. Horizontal support plate, 13. Bottom vertical plate, 14. U-shaped fork, 15. Copper wire, 16. Vertical plate, 17. Slider, 18. Second winch, 19. Support base. Detailed Implementation

[0016] See Figure 1 , 2 and Figure 3 This utility model includes a translation part, a vertical part, a first strip-shaped square column 1, a ladle bottom detection part, and a molten steel surface detection part; the vertical part is disposed on the translation part; the first strip-shaped square column 1 is disposed on the vertical part; the ladle bottom detection part and the molten steel surface detection part are both disposed on the first strip-shaped square column 1; the ladle bottom detection part can measure the relative position of the bottom end face of the tundish, and the molten steel surface detection part can measure the relative position of the molten steel surface, and the depth of the molten steel in the tundish can be determined by calculation.

[0017] The bottom detection section includes a long column 2, a cone 3, a guide plate 4, a horizontal plate 5, a first infrared rangefinder 6, and a first winch 7; the interior of the first strip-shaped square column 1 has a hole along its length, with the opening located at the lowest end of the first strip-shaped square column 1; the long column 2 is inserted into the long hole at the bottom end of the first strip-shaped square column 1, and the length of the long column 2 is the same as the length of the inner hole of the first strip-shaped square column 1; the long column 2 can be housed in the inner hole of the first strip-shaped square column 1, and the inner hole of the first strip-shaped square column 1 is the long column 2. The vertical movement provides guidance; the bottom end of the long column 2 is provided with a threaded hole, and the center of the end face of the cone 3 is provided with a threaded post, and the threaded post of the cone 3 is threadedly engaged with the threaded hole at the bottom end of the long column 2; the cone 3 will wear due to corrosion from molten steel and contact with the bottom end face of the tundish, and the threaded connection between the cone 3 and the long column 2 allows the replacement of the cone 3 to be completed quickly, making it convenient for workers to quickly replace the severely worn cone 3; since the total length of the long column 2, guide plate 4 and cone 3 is known... Therefore, when cone 3 contacts the bottom of the intermediate tundish, the total length minus the data from the first infrared rangefinder 6 is the actual vertical distance between the first infrared rangefinder 6 and the bottom of the intermediate tundish; the top surface of the first strip-shaped square column 1 is provided with a guide hole, and the guide plate 4 passes through the guide hole at the top of the first strip-shaped square column 1; the top of the guide plate 4 is provided with a horizontal plate 5, and the bottom of the guide plate 4 is connected to the top surface of the long column 2; the first infrared rangefinder 6 is mounted on the top of the outer wall of the first strip-shaped square column 1 by a bracket, and its infrared emitting end points to the bottom surface of the horizontal plate 5, and the signal output end of the first infrared rangefinder 6 is connected to the signal input end of the CPU; the first winch 7 is mounted on the top of the outer wall of the first strip-shaped square column 1 by a bracket, the center of the top surface of the first strip-shaped square column 1 is provided with a round hole, and the end of the pull rope of the first winch 7 passes through the round hole at the top of the first strip-shaped square column 1 and connects to the top of the long column 2, and the signal input end of the first winch 7 is connected to the signal output end of the CPU; the first winch 7 controls the raising and lowering of the long column 2 by the raising and lowering of the pull rope.

[0018] The molten steel surface detection section includes a second strip-shaped square column 8, a first connecting rod 9, a second connecting rod 10, a docking mechanism, a second infrared rangefinder, and a spring. The second strip-shaped square column 8 is disposed on the outer wall of the first strip-shaped square column 1, and the center line of the first strip-shaped square column 1 is parallel to the center line of the second strip-shaped square column 8. Two elongated holes are provided inside the second strip-shaped square column 8 along its length, and the openings of the elongated holes are located at the bottom end of the second strip-shaped square column 8. The first connecting rod 9 and the second connecting rod 10 are respectively inserted into different elongated holes inside the second strip-shaped square column 8. The docking mechanism is disposed at the bottom ends of the first connecting rod 9 and the second connecting rod 10. Two circular holes are provided on the top surface of the second strip-shaped square column 8. The two round holes are respectively connected to two different elongated holes; the round holes are for constant pressure to ensure that the two connecting rods can be smoothly inserted into the elongated holes; the second infrared rangefinder and the spring are respectively located at the top of the inner wall of the different elongated holes of the second strip-shaped square column 8; the two connecting rods move up and down synchronously and vertically. When the connecting rods move down, the springs are stretched and store elastic potential energy to be ready to pull the connecting rods back at any time; the second infrared rangefinder monitors the relative position of the connecting rods in real time, thus knowing the relative position of the copper wires; the infrared emitting end of the second infrared rangefinder points to the top of the first connecting rod 9; the bottom end of the spring is connected to the top of the second connecting rod 10; the signal output end of the second infrared rangefinder is connected to the signal input end of the CPU.

[0019] The docking mechanism includes a base plate 11, a horizontal support plate 12, a bottom vertical plate 13, a U-shaped fork 14, and copper wire 15. The base plate 11 is disposed between the bottom end of the first connecting rod 9 and the bottom end of the second connecting rod 10. The bottom vertical plate 13 is disposed on the bottom end surface of the base plate 11. The horizontal support plate 12 is disposed at the bottom end of the outer wall of the long column 2. The U-shaped fork 14 is disposed at the bottom end of the bottom vertical plate 13 and is engaged with the outer wall of the horizontal support plate 12. The U-shaped fork 14 has a through hole, and the horizontal support plate 12 also has... A circular hole is provided, and the perforation of the U-shaped fork 14 corresponds to the circular hole of the horizontal support plate 12. The copper wire 15 passes through the perforation of the U-shaped fork 14 and the circular hole of the horizontal support plate 12, and the copper wire 15 is wound around the perforation of the U-shaped fork 14 and the circular hole of the horizontal support plate 12 multiple times. The long column 2 drives the docking mechanism to rise and fall synchronously through the horizontal support plate 12, which also drives the connecting rod to rise and fall synchronously. The melting point of the copper wire is between the temperature of the protective slag and the temperature of the molten steel. When the copper wire comes into contact with the protective slag, it will not melt, but it will melt and break once it comes into contact with the molten steel.

[0020] The vertical movement section includes a vertical plate 16, a slider 17, and a second winch 18. A slide rail is provided along the length of the end face of the vertical plate 16, and the slider 17 is slidably mounted on the slide rail of the vertical plate 16. The second winch 18 is located at the top of the vertical plate 16, and the end of its pull rope is connected to the top of the slider 17. The slider 17 is connected to the outer wall of the first strip-shaped square column 1. The vertical movement of the slider 17 is controlled by the winding and unwinding of the pull rope of the second winch 18.

[0021] The translation section includes a support base 19, an extension block, and casters; casters are provided at all four corners of the lower end face of the support base 19; the extension block is mounted on the support base 19; the bottom end of the vertical plate 16 is mounted on the extension block; a display screen is mounted on the support base 19, and the signal input terminal of the display screen is connected to the signal output terminal of the CPU.

[0022] The CPU module in this invention is model 87C196KC.

[0023] This device includes the following steps:

[0024] In the initial state, slider 17 is located at the top of vertical plate 16; long column 2 is located inside the first strip-shaped square column 1;

[0025] Step 1: Move the device to the side of the tundish and position the cone 3 directly above the molten steel; then control the second winch 18 to drive the slider 17 down until the cone 3 approaches the protective slag covering the surface of the molten steel in the tundish. After the cone 3 approaches the protective slag, the second winch 18 stops operating.

[0026] Step 2: The first winch 7 slowly releases the pull rope. The slow release of the pull rope allows enough time for the molten steel to melt the copper wire, ensuring that the copper wire is burned off in time when it comes into contact with the surface of the molten steel. This causes the combination of the long column 2 and the cone 3 to descend synchronously. At the same time, since the horizontal support plate 12 at the bottom of the outer wall of the long column 2 is connected to the U-shaped fork 14 through the copper wire 15, the descent of the combination of the long column 2 and the cone 3 also drives the first connecting rod 9 and the second connecting rod 10 to descend synchronously. During the descent, the spring at the top of the second connecting rod 10 is stretched.

[0027] Step 3: The melting point of copper wire 15 is between the temperature of molten steel and the temperature of protective slag. Therefore, copper wire 15 will not melt when it comes into contact with protective slag, but it will be burned when it comes into contact with molten steel.

[0028] As the cone 3 and copper wire 15 descend, the data from each infrared rangefinder changes continuously. When the copper wire 15 comes into contact with the molten steel, it is burned off. At this point, the horizontal support plate 12 and the U-shaped fork 14 are no longer connected. Under the action of the spring, the first connecting rod 9 and the second connecting rod 10 are pulled back. At this moment, the data from the second infrared rangefinder changes abruptly, from gradually increasing to gradually decreasing. The data at this point of change, which is the instant the copper wire 15 is burned off, plus the known length of the first connecting rod 9, the known thickness of the base plate 11, and the known length of the bottom vertical plate 13, gives the total distance between the molten steel surface and the second infrared rangefinder.

[0029] Step 4: The melting of copper wire 15 does not affect the continued operation of the second winch 18. At this time, the combination of long column 2 and cone 3 continues to descend until cone 3 contacts the bottom of the inner wall of the tundish. At this point, the data of the first infrared rangefinder 6 no longer changes, indicating that cone 3 has successfully touched the bottom. When the data of the first infrared rangefinder 6 no longer changes, the second winch 18 reverses to reset long column 2 and cone 3. The minimum data detected by the first infrared rangefinder 6 corresponds to the position where cone 3 contacts the bottom end of the tundish. The total length of long column 2, cone 3, and guide plate 4 is known. The total length of 2, cone 3, and guide plate 4 minus the minimum data detected by the first infrared rangefinder 6 is the distance between the first infrared rangefinder 6 and the bottom face of the tundish. Since the positions of the first infrared rangefinder 6 and the second infrared rangefinder are fixed, the distances between the two infrared rangefinders are the same. Combined with the known distance between the molten steel and the second infrared rangefinder, and the known distance between the bottom of the molten steel and the first infrared rangefinder 6, the distance between the bottom of the molten steel and the liquid surface can be calculated, thus determining the depth of the molten steel. The data on the depth of the molten steel is displayed on the screen.

[0030] Step 5: After the second winch 18 pulls the long column 2 back, the first winch 7 will lift the slider 17 and then remove the device. At this time, the molten steel depth measurement operation in the tundish is completed. Before the next molten steel depth measurement operation, it is only necessary to re-thread the new copper wire 15 through the hole of the U-shaped fork 14 and the round hole of the horizontal support plate 12 and wrap it around several times.

Claims

1. A depth measuring device for molten steel in a ladle, characterized in that: It includes a translation section, a vertical section, a first strip-shaped square column (1), a ladle bottom detection section, and a molten steel surface detection section; the vertical section is set on the translation section; the first strip-shaped square column (1) is set on the vertical section; the ladle bottom detection section and the molten steel surface detection section are both set on the first strip-shaped square column (1).

2. The depth measuring device for molten steel in a ladle according to claim 1, characterized in that: The bottom detection section includes a long column (2), a cone (3), a guide plate (4), a horizontal plate (5), a first infrared rangefinder (6), and a first winch (7); the interior of the first strip-shaped square column (1) has a hole along its length, and the opening is located at the lowest end of the first strip-shaped square column (1); the long column (2) is inserted into the long hole at the bottom end of the first strip-shaped square column (1), and the length of the long column (2) is the same as the length of the inner hole of the first strip-shaped square column (1); the bottom end of the long column (2) is provided with a threaded hole, and the center of the end face of the cone (3) is provided with a threaded post, and the threaded post of the cone (3) is threadedly engaged with the threaded hole at the bottom end of the long column (2); the top surface of the first strip-shaped square column (1) is provided with a guide hole, and the guide plate (4) passes through the first strip-shaped square column. (1) The top guide hole; the top of the guide plate (4) is provided with a horizontal plate (5), and the bottom end of the guide plate (4) is connected to the top surface of the long column (2); the first infrared rangefinder (6) is set at the top of the outer wall of the first strip square column (1) through a bracket, and its infrared emitting end points to the bottom surface of the horizontal plate (5). The signal output end of the first infrared rangefinder (6) is connected to the signal input end of the CPU; the first winch (7) is set at the top of the outer wall of the first strip square column (1) through a bracket. A round hole is provided at the center of the top surface of the first strip square column (1), and the end of the pull rope of the first winch (7) passes through the round hole at the top of the first strip square column (1) and is connected to the top of the long column (2). The signal input end of the first winch (7) is connected to the signal output end of the CPU.

3. The depth measuring device for molten steel in a ladle according to claim 2, characterized in that: The molten steel surface detection part includes a second strip-shaped square column (8), a first connecting rod (9), a second connecting rod (10), a docking mechanism, a second infrared rangefinder, and a spring; the second strip-shaped square column (8) is set on the outer wall of the first strip-shaped square column (1), and the center line of the first strip-shaped square column (1) is parallel to the center line of the second strip-shaped square column (8); two elongated holes are provided inside the second strip-shaped square column (8) along its length direction, and the openings of the elongated holes are located at the bottom end of the second strip-shaped square column (8); the first connecting rod (9) and the second connecting rod (10) are respectively inserted into the second strip-shaped square column (8). 8) Inside different elongated holes; the docking mechanism is set at the bottom end of the first connecting rod (9) and the second connecting rod (10); the top surface of the second strip-shaped square column (8) is provided with two round holes, and the two round holes are respectively docked with two different elongated holes; the second infrared rangefinder and the spring are respectively located at the top of the inner wall of the different elongated holes of the second strip-shaped square column (8); the infrared emitting end of the second infrared rangefinder points to the top of the first connecting rod (9); the bottom end of the spring is connected to the top of the second connecting rod (10); the signal output end of the second infrared rangefinder is connected to the signal input end of the CPU.

4. The depth measuring device for molten steel in a ladle according to claim 3, characterized in that: The docking mechanism includes a base plate (11), a horizontal support plate (12), a bottom vertical plate (13), a U-shaped fork (14), and a copper wire (15); the base plate (11) is disposed between the bottom end of the first connecting rod (9) and the bottom end of the second connecting rod (10); the bottom vertical plate (13) is disposed on the bottom end surface of the base plate (11); the horizontal support plate (12) is disposed at the bottom end of the outer wall of the long column (2); the U-shaped fork (14) is disposed at the bottom of the bottom vertical plate (13). The U-shaped fork (14) is attached to the outer wall of the horizontal support plate (12); the U-shaped fork (14) is provided with a through hole, and the horizontal support plate (12) is also provided with a round hole, the through hole of the U-shaped fork (14) and the round hole of the horizontal support plate (12) are positioned corresponding to each other; the copper wire (15) passes through the through hole of the U-shaped fork (14) and the round hole of the horizontal support plate (12), and the copper wire (15) is wound around the through hole of the U-shaped fork (14) and the round hole of the horizontal support plate (12) multiple times.

5. The depth measuring device for molten steel in a ladle according to claim 4, characterized in that: The vertical movement section includes a vertical plate (16), a slider (17), and a second winch (18); the end face of the vertical plate (16) is provided with a slide rail along its length direction, and the slider (17) is slidably disposed on the slide rail of the vertical plate (16); the second winch (18) is disposed at the top of the vertical plate (16), and the end of its pull rope is connected to the top of the slider (17); the slider (17) is connected to the outer wall of the first strip-shaped square column (1).

6. The depth measuring device for molten steel in a ladle according to claim 5, characterized in that: The translation part includes a support base (19), an extension block and casters; casters are provided at the four corners of the lower end face of the support base (19); the extension block is provided on the support base (19); the bottom end of the vertical plate (16) is provided on the extension block; a display screen is provided on the support base (19), and the signal input terminal of the display screen is connected to the signal output terminal of the CPU.

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