Argon blowing device for long nozzle

Abstract

The utility model relates to a long nozzle argon blowing device, and belongs to the technical field of steel ladle argon blowing treatment, the long nozzle argon blowing device comprises a long nozzle body and a shielding ring piece, the inner wall of the long nozzle body is provided with a ring groove for argon to enter, one side of the opening of the ring groove is provided with a mounting convex ring, the mounting convex ring is provided with a first aluminum silicate sealing gasket, and the first aluminum silicate sealing gasket is provided with a second aluminum silicate sealing gasket. One side of the shielding ring piece is mounted on the mounting convex ring through a high-temperature-resistant bolt, the other side of the shielding ring piece is obliquely mounted on the inner wall of the long nozzle body through a high-temperature-resistant bolt, one side of the first aluminum silicate sealing gasket abuts against the mounting convex ring, and the other side of the first aluminum silicate sealing gasket abuts against the shielding ring piece. The argon blowing effect of the long nozzle can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of ladle argon blowing treatment, and in particular to a long shroud argon blowing device. Background Art

[0002] As the purity requirements of high-quality special steel are getting higher and higher, the secondary oxidation and nitrogen addition of molten steel directly affect the quality of molten steel. The continuous casting molten steel pouring process is that the molten steel flows from the ladle through the long nozzle into the tundish. The long nozzle is used to connect the ladle and the tundish to protect the molten steel from secondary oxidation and cause molten steel quality problems. Among them, the upper part of the long nozzle is connected to the ladle lower nozzle, and the lower part is inserted into the molten steel in the tundish. However, the rapid flow of molten steel will produce suction, which will inhale the surrounding air into the molten steel. In order to reduce the oxidation of molten steel and remove inclusions in the molten steel, argon blowing protection is required in the long nozzle.

[0003] Argon blowing treatment in ladle is a simple refining method for degassing molten steel and removing non-metallic inclusions. This method has simple process, simple equipment and remarkable refining effect. In detail, the shroud is a rotating pipe, and a circular airflow ring channel is opened in the wall thickness of the shroud; an argon gas pipeline connected to the airflow ring channel and blowing argon into the airflow ring channel is installed on the outer wall of the shroud; multiple argon gas outlets connected to the airflow ring channel are spaced apart on the inner wall of the shroud, thereby realizing multi-angle argon blowing.

[0004] In the related art, in order to simplify the production of the airflow ring channel, an annular groove is first opened on the inner wall of the long water outlet as the airflow ring channel, and then a blocking ring is welded at the notch of the annular groove to cover the notch of the annular groove, and finally an argon gas outlet is opened on the blocking ring.

[0005] With regard to the above-mentioned related technologies, since the welding of the blocking ring needs to be performed inside the long water nozzle, and the internal space of the long water nozzle is small, it is not easy for the workers to operate during welding. Therefore, when welding the two ends of the blocking ring, it is easy to have loose welds or leaking welds, which leads to other gaps between the blocking ring and the airflow ring channel except for the argon outlet, so that the argon gas cannot be discharged from the argon outlet in a concentrated manner, but is dispersed everywhere to cause waste, affecting the argon blowing effect. Utility Model Content

[0006] In order to improve the argon blowing effect of a long shroud, the present application provides an argon blowing device for a long shroud.

[0007] The present application provides a long shroud argon blowing device, which adopts the following technical solution:

[0008] A long shroud argon blowing device comprises a long shroud body and a shielding ring, wherein an annular groove for allowing argon gas to enter is opened on the inner wall of the long shroud body, a mounting convex ring is arranged on one side of the notch of the annular groove, a first aluminum silicate sealing gasket is arranged on the mounting convex ring, one side of the shielding ring is mounted on the mounting convex ring by means of high temperature resistant bolts, and the other side is obliquely mounted on the inner wall of the long shroud body by means of high temperature resistant bolts, one side of the first aluminum silicate sealing gasket is pressed against the mounting convex ring, and the other side is pressed against the shielding ring.

[0009] In order to enable the shielding ring to be installed obliquely inside the long water outlet body, the installation protrusion ring includes a transverse protrusion plate and a vertical protrusion plate, the vertical protrusion plate is located between the transverse protrusion plate and the shielding ring, and the first aluminum silicate sealing gasket is arranged above the vertical protrusion plate.

[0010] In order to improve the stability of the first aluminum silicate sealing gasket after installation, a vertical plate sealing groove for inserting the first aluminum silicate sealing gasket is opened on one side of the vertical convex plate close to the shielding ring plate.

[0011] In order to facilitate the installation of the side of the shielding ring away from the installation convex ring on the inner wall of the long water outlet body, a convex edge is provided at the side of the ring groove away from the installation convex ring, and the side of the shielding ring away from the installation convex ring is installed on the convex edge.

[0012] In order to improve the sealing between the shielding ring and the convex edge, a second aluminum silicate sealing gasket is arranged between the convex edge and the shielding ring, and one side of the second aluminum silicate sealing gasket is pressed against the convex edge, and the other side is pressed against the shielding ring.

[0013] In order to improve the stability of the second aluminum silicate sealing gasket after installation, a top sealing groove for partially inserting the second aluminum silicate sealing gasket is opened on the convex edge.

[0014] In order to allow the argon in the annular groove to be blown out evenly at multiple angles, an argon outlet connected to the annular groove is provided on one side of the vertical convex plate away from the inner wall of the long shroud body.

[0015] In order to introduce argon into the annular groove, an argon inlet pipe communicating with the annular groove is arranged on the outer wall of the long shroud body.

[0016] In order to improve the convenience of connecting the argon gas inlet pipe to the argon gas generating device, a flange is provided at one end of the argon gas inlet pipe away from the long shroud body for facilitating connection with the argon gas generating device.

[0017] In summary, the present application includes at least one of the following beneficial technical effects:

[0018] Under the action of the mounting convex ring, the shielding ring piece can be installed obliquely inside the long nozzle body. Compared with the shielding ring piece installed inside the long nozzle body along the axial direction of the long nozzle body, the above structure enables the staff to fix the shielding ring piece at the opening at one end of the long nozzle body, making the fixing of the shielding ring piece more convenient, and thus less likely to have a gap during the fixing process;

[0019] The provision of the first aluminum silicate sealing gasket and the second aluminum silicate sealing gasket improves the sealing performance of the contact portion between the shielding ring and the inner part of the long nozzle body, thereby making it difficult for argon gas to leak from the gap between the shielding ring and the long nozzle body after the shielding ring is installed, so that the argon gas can be concentrated at the argon gas outlet to improve the argon blowing effect;

[0020] The first aluminum silicate sealing gasket and the second aluminum silicate sealing gasket can withstand relatively high temperatures due to their own characteristics and are not easily melted by high temperatures, thereby extending the service life of the seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional view of the argon blowing device in the embodiment of the present application.

[0022] Figure 2 yes Figure 1 Enlarged view of part A in the middle.

[0023] Explanation of the reference numerals in the accompanying drawings: 1. Long water nozzle body; 11. Ring groove; 12. First aluminum silicate sealing gasket; 13. Second aluminum silicate sealing gasket; 14. Large diameter tube; 15. Small diameter tube; 16. Mounting convex ring; 17. Convex edge; 18. Horizontal convex plate; 19. Vertical convex plate; 191. Argon outlet; 2. Shielding ring piece; 21. First lateral portion; 22. Inclined portion; 23. Second lateral portion; 24. Vertical portion; 3. Argon inlet pipe; 31. Flange. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1-2 This application is described in further detail.

[0025] The present application embodiment discloses a long shroud argon blowing device. Figure 1 and Figure 2 The argon blowing device of the shroud comprises a shroud body 1 and a shielding ring 2. An annular groove 11 for allowing external argon gas to enter is provided on the inner wall of the shroud body 1, and the shielding ring 2 is used to shield the notch of the annular groove 11 inside the shroud body 1, and a first aluminum silicate sealing gasket 12 and a second aluminum silicate sealing gasket 13 are respectively provided at the contacting place between the shielding ring 2 and the shroud body 1, thereby making it difficult for argon gas to leak from the gap formed between the shielding ring 2 and the shroud body 1 to affect the argon blowing effect.

[0026] Reference Figure 1 and Figure 2 The shroud body 1 is a rotating body with openings at both ends, and the shroud body 1 is funnel-shaped, that is, the shroud body 1 includes a large-diameter pipe 14 connected to the ladle and a small-diameter pipe 15 connected to the tundish. The large-diameter pipe 14 and the small-diameter pipe 15 are integrally formed, and the inner diameter of the large-diameter pipe 14 is larger than the inner diameter of the small-diameter pipe 15, so that the molten steel in the ladle flows into the tundish more smoothly through the shroud body 1.

[0027] The annular groove 11 is formed on the inner wall of the small diameter tube 15, and an argon inlet pipe 3 is fixedly installed on the outer wall of the small diameter tube 15, and the argon inlet pipe 3 is connected with the annular groove 11. The end of the argon inlet pipe 3 away from the long nozzle body 1 is integrally formed with a flange 31, and the argon production equipment can be connected to the argon inlet pipe 3 through the flange 31, so that the argon gas enters the annular groove 11.

[0028] Reference Figure 1 and Figure 2 The notch of the annular groove 11 away from the large diameter tube 14 is integrally formed with a mounting convex ring 16, and the notch of the annular groove 11 close to the large diameter tube 14 is integrally formed with a convex edge 17. One side of the shielding ring piece 2 is mounted on the mounting convex ring 16, and the other side is mounted on the convex edge 17. Under the action of the mounting convex ring 16 and the convex edge 17, the shielding ring piece 2 gradually tilts toward the central axis direction of the small diameter tube 15 along the direction from the large diameter tube 14 to the small diameter tube 15. This arrangement makes it easy for the staff to install and fix the shielding ring piece 2.

[0029] The mounting protruding ring 16 includes a transverse protruding plate 18 and a vertical protruding plate 19. The vertical protruding plate 19 is located on the side of the transverse protruding plate 18 away from the inner wall of the small-diameter tube 15. The other end of the vertical protruding plate 19 extends toward the direction close to the convex edge 17, that is, the interface after the transverse protruding plate 18 and the vertical protruding plate 19 are spliced ​​is L-shaped. The transverse protruding plate 18 and the vertical protruding plate 19 are integrally formed.

[0030] Reference Figure 1 and Figure 2 The first aluminum silicate sealing gasket 12 is arranged on the side of the vertical convex plate 19 close to the convex edge 17. The side of the vertical convex plate 19 close to the convex edge 17 is provided with a vertical plate sealing groove for inserting the first aluminum silicate sealing gasket 12. The side of the first aluminum silicate sealing gasket 12 close to the convex edge 17 protrudes out of the vertical plate sealing groove and is pressed against the shielding ring plate 2. The side of the vertical convex plate 19 away from the inner wall of the small-diameter tube 15 is provided with an argon outlet 191 connected to the annular groove 11. There are multiple argon outlets 191, and multiple argon outlets 191 are evenly spaced along the circumference of the small-diameter tube 15.

[0031] A top sealing groove is formed on the side of the convex edge 17 away from the mounting convex ring 16 , into which the second aluminum silicate sealing gasket 13 is inserted, and the side of the second aluminum silicate sealing gasket 13 away from the bottom of the top sealing groove protrudes out of the top sealing groove and presses against the shielding ring 2 .

[0032] Reference Figure 1 and Figure 2 The shielding ring plate 2 includes a first transverse portion 21, an inclined portion 22, a second transverse portion 23 and a vertical portion 24. The inclined portion 22 is located between the first transverse portion 21 and the second transverse portion 23. The first transverse portion 21 is located close to the side of the flange 17 and is pressed against the second aluminum silicate sealing gasket 13, and the first transverse portion 21 is fixed to the flange 17 by high-temperature resistant bolts. The second transverse portion 23 is located close to the side of the vertical convex plate 19 and is pressed against the first aluminum silicate sealing gasket 12. The vertical portion 24 is located on the side of the vertical convex plate 19 away from the transverse convex plate 18, and the vertical portion 24 is fixed to the vertical convex plate 19 by high-temperature resistant bolts.

[0033] The implementation principle of the argon blowing device of a long water nozzle in the embodiment of the present application is as follows: first, the provision of the first aluminum silicate sealing gasket 12 and the second aluminum silicate sealing gasket 13 improves the sealing performance of the contact portion between the shielding ring 2 and the long water nozzle body 1, thereby making it difficult for argon gas to leak from the gap between the shielding ring 2 and the long water nozzle body 1 after the shielding ring 2 is installed, so that the argon gas can be concentrated at the argon outlet 191 to improve the argon blowing effect. Secondly, under the action of the installation convex ring 16, the shielding ring 2 can be installed obliquely inside the long water nozzle body 1. Compared with the shielding ring 2 being installed inside the long water nozzle body 1 along the axial direction of the long water nozzle body 1, the above structure enables the staff to fix the shielding ring 2 at the opening at one end of the long water nozzle body 1, making the fixing of the shielding ring 2 more convenient, and thus less likely to have gaps during the fixing process.

[0034] 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 long shroud argon blowing device, characterized in that: The invention comprises a long shroud body (1) and a shielding ring (2), wherein an annular groove (11) for allowing argon gas to enter is provided on the inner wall of the long shroud body (1), a mounting convex ring (16) is provided on one side of the notch of the annular groove (11), a first aluminum silicate sealing gasket (12) is provided on the mounting convex ring (16), one side of the shielding ring (2) is mounted on the mounting convex ring (16) by means of high temperature resistant bolts, and the other side is obliquely mounted on the inner wall of the long shroud body (1) by means of high temperature resistant bolts, one side of the first aluminum silicate sealing gasket (12) is pressed against the mounting convex ring (16), and the other side is pressed against the shielding ring (2).

2. The argon blowing device for a long shroud according to claim 1, characterized in that: The mounting convex ring (16) comprises a transverse convex plate (18) and a vertical convex plate (19), the vertical convex plate (19) being located between the transverse convex plate (18) and the shielding ring plate (2), and the first aluminum silicate sealing gasket (12) being arranged above the vertical convex plate (19).

3. The argon blowing device for a long shroud according to claim 2, characterized in that: A vertical plate sealing groove for inserting the first aluminum silicate sealing gasket (12) is provided on one side of the vertical convex plate (19) close to the shielding ring plate (2).

4. The argon blowing device for a long shroud according to claim 3, characterized in that: A convex edge (17) is provided at the side of the notch of the annular groove (11) facing away from the mounting convex ring (16), and the side of the shielding ring piece (2) facing away from the mounting convex ring (16) is mounted on the convex edge (17).

5. The argon blowing device for a long shroud according to claim 4, characterized in that: A second aluminum silicate sealing gasket (13) is provided between the convex edge (17) and the shielding ring piece (2); one side of the second aluminum silicate sealing gasket (13) is pressed tightly against the convex edge (17) and the other side is pressed tightly against the shielding ring piece (2).

6. The argon blowing device for a long shroud according to claim 5, characterized in that: The convex edge (17) is provided with a top sealing groove for inserting a portion of the second aluminum silicate sealing gasket (13).

7. The argon blowing device for a long shroud according to claim 6, characterized in that: An argon outlet (191) communicating with the annular groove (11) is provided on a side of the vertical convex plate (19) facing away from the inner wall of the long shroud body (1).

8. The argon blowing device for a long shroud according to claim 1, characterized in that: An argon gas inlet pipe (3) communicating with the annular groove (11) is provided on the outer wall of the long shroud body (1).

9. The argon blowing device for a long shroud according to claim 8, characterized in that: An end of the argon gas inlet pipe (3) facing away from the long shroud body (1) is provided with a flange (31) for facilitating connection with argon gas generating equipment.

Images