Stopper rod device for reducing residual molten steel in tundish

Abstract

The utility model relates to the field of steel, and discloses a stopper rod device for reducing residual molten steel in a tundish, which comprises a continuous casting tundish body, a stopper rod main body is arranged in the continuous casting tundish body, a connecting column is fixed at the bottom end of the stopper rod main body, four grooves are distributed on the side wall surface of the connecting column, and the stopper rod main body is arranged in the continuous casting tundish body. Grooves are formed in the side wall of the connecting column, the grooves in the side wall of the connecting column are of four clockwise arc-shaped structures which are evenly distributed, a rod head is fixed to the bottom end of the connecting column, the width of each groove is 8 mm, the depth of each groove is 5 mm, and each groove is a square groove inclined by 45 degrees. According to the stopper rod, the stopper rod head is designed along the clockwise arc-shaped included angle, so that the spiral generated by the influence of the ground deflection force can be destroyed under the condition of low liquid level, the liquid level of a tundish in molten steel is stabilized, and slag entrapment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of steel, in particular to a stopper rod device for reducing residual molten steel in a tundish. Background Art

[0002] The continuous casting tundish is an important metallurgical reactor, and its metallurgical functions are constantly being developed. As an important flow control device for the continuous casting tundish, the stopper rod plays an important role in regulating the flow rate of the submerged nozzle and the liquid level of the crystallizer. When the molten steel level in the continuous casting tundish is lower than a certain critical value, a converging vortex will form in the area near the stopper rod on the molten steel surface, causing slag rolls, which will pollute the molten steel in the crystallizer and deteriorate the quality of the ingot.

[0003] According to the Chinese patent publication number: CN216096378U, a continuous casting tundish stopper rod device for preventing slag rolling includes a stopper rod body and a suppression ring; the suppression ring includes a bottom plate, a sleeve is arranged through the center of the bottom plate, and a plurality of partition plates are arranged between the outer side of the sleeve and the upper surface of the bottom plate; the outer side of the stopper rod body is adapted to the sleeve and is inserted into the sleeve, there is a gap between the stopper rod body and the sleeve and an anti-rotation structure is arranged, and a stopper with a size larger than the sleeve is arranged at the lower part.

[0004] In the above scheme, there is a gap between the stopper rod body and the sleeve and an anti-rotation structure is provided, resulting in the following disadvantages: the molten steel rotates counterclockwise during the casting process, making it impossible to stabilize the liquid level in the molten steel and increasing the slag roll. Utility Model Content

[0005] The utility model aims to provide a stopper rod device for reducing residual molten steel in a tundish, so as to solve the problem that the molten steel rotates counterclockwise during the casting process, causing the molten steel tundish liquid level to be unable to be stabilized and the slag roll to increase.

[0006] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical scheme: a stopper rod device for reducing residual molten steel in a tundish, comprising a continuous casting tundish body, a stopper rod body is arranged inside the continuous casting tundish body, a connecting column is fixed to the bottom end of the stopper rod body, four grooves are distributed on the side wall of the connecting column, the grooves on the side wall of the connecting column are four evenly distributed clockwise arc structures, a rod head is fixed to the bottom end of the connecting column, the width of the groove is 8mm, the depth of the groove is 5mm, and the groove is a square groove inclined at forty-five degrees.

[0007] Preferably, a threaded top column is fixed to the top surface of the stopper rod body, a top ring is sleeved on the outer wall of the threaded top column, a connecting hole is opened on the top surface of the top ring, the threaded top column passes through the connecting hole, and the threaded top column passes through the connecting hole and the extended part is threadedly connected to a threaded cover.

[0008] Preferably, a limiting ring is arranged below the top ring, a plurality of limiting columns are fixed between the limiting ring and the top ring, and a connecting plate is fixed on one side of the limiting ring.

[0009] Preferably, a fixing plate is fixed to one side of the continuous casting tundish body, and two sliding grooves are provided on the top surface of the fixing plate, and sliding blocks are slidably fitted inside the two sliding grooves, and a connecting block is fixed to the top surface of the sliding block, and fixing holes are provided on both sides of the fixing plate, and a first threaded groove is provided on the side away from the two sliding blocks, and a first bolt passes through the fixing hole, and the first bolt passes through the fixing hole and is threadedly connected to the first threaded groove, and a handle is fixed to one side of the connecting block.

[0010] Preferably, a mounting block is fixed on the top surface of the connecting block, an electric push rod is fixed on the top surface of the mounting block, a pushing block is fixed to one end of the telescopic rod of the electric push rod, a sliding hole is opened through one side of the pushing block, and a connecting plate is slidably arranged inside the sliding hole.

[0011] Preferably, a connecting hole is provided on the top surface of the pushing block, a second bolt passes through the inside of the connecting hole, and a second thread groove is provided on the top surface of the connecting plate, the second bolt passes through the connecting hole and is threadedly connected to the second thread groove.

[0012] Compared with the prior art, a stopper rod device for reducing residual molten steel in the tundish using the above technical solution has the following beneficial effects:

[0013] 1. During use, when the tundish liquid is lower than 300mm, the staff will extend the connecting column to the inside of the continuous casting tundish body. At this time, the groove will contact the counterclockwise rotating tundish liquid, and the tundish liquid will be affected by the clockwise arc structure. The clockwise arc angle design on the upper edge of the plug rod head can destroy the vortex caused by the Coriolis force under low liquid level conditions, stabilize the tundish liquid level in the molten steel, and reduce slag rolls. Through the improvement of this device, the residual molten steel casting surplus in the tundish can be reduced;

[0014] 2. In use, the stopper rod body is fixed to the top ring by setting the limit ring sleeve on the outer wall of the stopper rod body, and the threaded top column is passed through the connection hole and the extended part of the threaded top column is threadedly connected through the threaded cover, so that the threaded top column and the threaded cover are fixed, so that the stopper rod body and the top ring are fixed, and the top ring and the limit ring are connected through the limit column, so as to ensure that the top ring can be effectively used with the limit ring. After the stopper rod body is fixed, the stopper rod body can be effectively supported by passing the connecting plate through the sliding groove of the stopper rod body, so as to ensure that the stopper rod body will not shake during use, and the second bolt is passed through the communication hole and threadedly connected with the second thread groove, so as to fix the connecting plate inside the push block, so as to ensure that the connecting plate can be more stable, so as to make the stopper rod body more stable. When the middle package liquid is not less than 300mm, the push block is driven to move upward by the push of the electric push rod telescopic rod, so as to drive the stopper rod body to move upward. When the middle package liquid is less than 300mm, the stopper rod body can be moved downward by the contraction of the electric push rod telescopic rod, enter the middle package liquid, and affect the middle package liquid. When the mounting block needs to be repaired, the first bolt is screwed out to move the first bolt away from the first thread groove, and then the handle is held and pulled outward to pull out the top surface of the connecting block and the fixing plate, so as to replace or repair the mounting block. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of an embodiment.

[0016] Figure 2 It is a schematic diagram of the disassembly of the embodiment.

[0017] Figure 3 It is a schematic diagram of the explosion at the continuous casting tundish body in the embodiment.

[0018] Figure 4 It is a schematic diagram of an explosion at a connecting block in an embodiment.

[0019] In the figure: 1. continuous casting tundish body; 2. stopper rod body; 3. threaded top column; 4. groove; 5. connecting column; 6. rod head; 7. fixing plate; 8. sliding groove; 9. sliding block; 10. connecting block; 11. handle; 12. fixing hole; 13. first threaded groove; 14. first bolt; 15. mounting block; 16. electric push rod; 17. pushing block; 18. sliding hole; 19. connecting hole; 20. second bolt; 21. connecting plate; 22. second threaded groove; 23. limiting ring; 24. top ring; 25. connecting hole; 26. threaded cover; 27. limiting column. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0021] like Figure 1-Figure 3 As shown, a stopper rod device for reducing residual molten steel in a tundish comprises a continuous casting tundish body 1, a stopper rod body 2 is arranged inside the continuous casting tundish body 1, a connecting column 5 is fixed to the bottom end of the stopper rod body 2, four grooves 4 are distributed on the side wall surface of the connecting column 5, the grooves 4 on the side wall of the connecting column 5 are four evenly distributed clockwise arc structures, a rod head 6 is fixed to the bottom end of the connecting column 5, the width of the groove 4 is 8 mm, the depth of the groove 4 is 5 mm, and the groove 4 is a square groove inclined at forty-five degrees.

[0022] During use, when the tundish liquid is lower than 300mm, the staff will extend the connecting column 5 to the interior of the continuous casting tundish body 1. At this time, the groove 4 will come into contact with the counterclockwise rotating tundish liquid, and affect the tundish liquid through the clockwise arc structure. The clockwise arc angle design on the upper edge of the plugger rod head 6 can destroy the vortex caused by the Coriolis force under low liquid level conditions, stabilize the molten steel liquid level, and reduce slag rolling. Through the improvement of this device, the residual molten steel casting remainder in the tundish can be reduced.

[0023] like Figure 1-Figure 4 As shown, a fixing plate 7 is fixed to one side of the continuous casting tundish body 1, and two sliding grooves 8 are provided on the top surface of the fixing plate 7. Sliding blocks 9 are slidably matched inside the two sliding grooves 8, and a connecting block 10 is fixed to the top surface of the sliding block 9. Fixing holes 12 are provided on both sides of the fixing plate 7, and first threaded grooves 13 are provided on the sides away from each other of the two sliding blocks 9. First bolts 14 penetrate the inside of the fixing holes 12, and the first bolts 14 penetrate the fixing holes 12 and are threadedly connected with the first threaded grooves 13. A handle 11 is fixed to one side of the connecting block 10, and a threaded top column 3 is fixed to the top surface of the stopper rod body 2, and a top ring 24 is provided on the outer wall of the threaded top column 3, and a connecting hole 25 is provided on the top surface of the top ring 24, and the threaded top column 3 penetrates the connecting hole 25. The threaded top column 3 penetrates the connecting hole 25. The hole 25 and the extending part are threadedly connected with a threaded cover 26, a limit ring 23 is arranged below the top ring 24, a number of limit columns 27 are fixed between the limit ring 23 and the top ring 24, a connecting plate 21 is fixed to one side of the limit ring 23, a mounting block 15 is fixed to the top surface of the connecting block 10, an electric push rod 16 is fixed to the top surface of the mounting block 15, a pushing block 17 is fixed to one end of the telescopic rod of the electric push rod 16, a sliding hole 18 is penetrated through one side of the pushing block 17, a connecting plate 21 is slidably arranged inside the sliding hole 18, a connecting hole 19 is arranged on the top surface of the pushing block 17, a second bolt 20 is penetrated inside the connecting hole 19, a second thread groove 22 is arranged on the top surface of the connecting plate 21, the second bolt 20 penetrates the communicating hole 19 and is threadedly connected with the second thread groove 22.

[0024] In use, the stopper ring 23 is sleeved on the outer wall of the stopper rod body 2, and the threaded top column 3 is passed through the connection hole 25, and the extended part of the threaded top column 3 is threadedly connected through the threaded cover 26, so that the threaded top column 3 and the threaded cover 26 are fixed, so that the stopper rod body 2 and the top ring 24 are fixed, and the top ring 24 and the stopper ring 23 are connected through the stopper column 27, so that the top ring 24 can be effectively used with the stopper ring 23. After the stopper rod body 2 is fixed, the connecting plate 21 is passed through the sliding groove 8 of the stopper rod body 2 so that the stopper rod body 2 can be effectively supported, so that the stopper rod body 2 will not shake during use, and the second bolt 20 is passed through the communication hole 19 and is threadedly connected with the second thread groove 22, so that the connecting plate 21 is fixed inside the push block 17, so that the connecting plate 21 can be more stable, so that the stopper rod body 2 can also be more stable. When the liquid in the middle package is not lower than 300mm, the push block 17 is driven upward by the telescopic rod of the electric push rod 16, thereby driving the stopper rod body 2 to move upward. When the liquid in the middle package is lower than 300mm, the stopper rod body 2 can be moved downward by the contraction of the telescopic rod of the electric push rod 16, and enter the liquid in the middle package to affect the liquid in the middle package. When it is necessary to inspect the mounting block 15, the first bolt 14 is screwed out to make the first bolt 14 away from the first thread groove 13, and then the handle is held and pulled outward to pull the connection block 10 and the top surface of the fixing plate 7 out, and the mounting block 15 is replaced or inspected.

[0025] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A stopper rod device for reducing residual molten steel in a tundish, comprising a continuous casting tundish body (1), characterized in that: A stopper rod body (2) is arranged inside the continuous casting tundish body (1), a connecting column (5) is fixed to the bottom end of the stopper rod body (2), four grooves (4) are distributed on the side wall of the connecting column (5), the grooves (4) on the side wall of the connecting column (5) are four evenly distributed clockwise arc structures, a rod head (6) is fixed to the bottom end of the connecting column (5), the width of the groove (4) is 8 mm, the depth of the groove (4) is 5 mm, and the groove (4) is a square groove inclined at forty-five degrees.

2. A stopper rod device for reducing residual molten steel in a tundish according to claim 1, characterized in that: A threaded top column (3) is fixed to the top surface of the stopper rod body (2), a top ring (24) is sleeved on the outer wall of the threaded top column (3), a connecting hole (25) is opened on the top surface of the top ring (24), the threaded top column (3) passes through the connecting hole (25), and the threaded top column (3) passes through the connecting hole (25) and the extended part is threadedly connected to a threaded cover (26).

3. A stopper rod device for reducing residual molten steel in a tundish according to claim 2, characterized in that: A limiting ring (23) is arranged below the top ring (24), a plurality of limiting columns (27) are fixed between the limiting ring (23) and the top ring (24), and a connecting plate (21) is fixed on one side of the limiting ring (23).

4. A stopper rod device for reducing residual molten steel in a tundish according to claim 1, characterized in that: A fixing plate (7) is fixed on one side of the continuous casting tundish body (1), and two sliding grooves (8) are provided on the top surface of the fixing plate (7), and sliding blocks (9) are slidably matched inside the two sliding grooves (8), and a connecting block (10) is fixed on the top surface of the sliding block (9). Fixing holes (12) are provided on both sides of the fixing plate (7), and a first thread groove (13) is provided on the side away from the two sliding blocks (9), and a first bolt (14) passes through the inside of the fixing hole (12), and the first bolt (14) passes through the fixing hole (12) and is threadedly connected to the first thread groove (13), and a handle (11) is fixed on one side of the connecting block (10).

5. A stopper rod device for reducing residual molten steel in a tundish according to claim 4, characterized in that: A mounting block (15) is fixed on the top surface of the connecting block (10), an electric push rod (16) is fixed on the top surface of the mounting block (15), a pushing block (17) is fixed on one end of the telescopic rod of the electric push rod (16), a sliding hole (18) is penetrated through one side of the pushing block (17), and a connecting plate (21) is slidably arranged inside the sliding hole (18).

6. A stopper rod device for reducing residual molten steel in a tundish according to claim 5, characterized in that: A connecting hole (19) is provided on the top surface of the pushing block (17), a second bolt (20) passes through the inside of the connecting hole (19), a second thread groove (22) is provided on the top surface of the connecting plate (21), the second bolt (20) passes through the connecting hole (19) and is threadedly connected to the second thread groove (22).

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