Movable slag line reinforcing sleeve

Abstract

The invention discloses a movable slag line reinforcing sleeve which comprises a stopper rod body, a connecting screw rod is arranged in the stopper rod body, an adjusting protection device is arranged on the stopper rod body, and the adjusting protection device comprises a reinforcing protection sleeve and a height adjusting device connected to the reinforcing protection sleeve through a plug pin or an embedded part. The stopper rod body and the adjusting protection device extend to the position below the working liquid level of the tundish, the height adjusting device does not make contact with the working liquid level of the tundish, or the connecting position of the reinforcing protection sleeve and the height adjusting device does not make contact with the working liquid level of the tundish. The height adjusting device comprises a first pressure plate and a second pressure plate which is parallel to the first pressure plate and connected with the reinforced protective sleeve, and the second pressure plate can move up and down relative to the first pressure plate; the adjusting protection device vertically adjusts the distance between the first pressing disc and the second pressing disc through an adjusting rod to achieve vertical movement of the reinforcing protection sleeve.

Description

Technical Field

[0001] This invention belongs to the field of metallurgical / continuous casting technology, specifically relating to a movable slag line reinforcing sleeve. Background Technology

[0002] The existing stopper rod reinforcing sleeve is connected to the stopper rod body by fire clay, and its position is fixed and cannot be moved. During use, the liquid level in the continuous casting tundish is generally maintained at a fixed height or the liquid level can be finely adjusted. The erosion position of the reinforcing sleeve is fixed and cannot be moved, that is, the slag line cannot be adjusted or the liquid level in the tundish can be adjusted. The above operations can only be adjusted 1-2 times to change the erosion position, but adjusting the liquid level in the tundish will affect the flow field and temperature distribution of the entire tundish, thus affecting the quality of the molten steel.

[0003] In view of the above factors, a movable slag line reinforcing sleeve is provided, which can move up and down by adjusting the distance between the first pressure plate and the second pressure plate by adjusting the adjusting rod. Summary of the Invention

[0004] The purpose of this invention is to provide a movable slag line reinforcing sleeve to solve the problems mentioned in the background art.

[0005] The objective of this invention is achieved through the following technical solution: a movable slag line reinforcing sleeve, comprising a stopper rod body, a connecting screw being provided inside the stopper rod body, and an adjustment and protection device being provided on the stopper rod body, the adjustment and protection device comprising a reinforcing protective sleeve and a height adjustment device connected to the reinforcing protective sleeve by a pin or a pre-embedded part.

[0006] The stopper rod and the adjusting and protective device extend below the working fluid level of the tundish, and the height adjusting device does not contact the working fluid level of the tundish or the connection between the reinforced protective sleeve and the height adjusting device does not contact the working fluid level of the tundish.

[0007] Furthermore, the height adjustment device includes a first pressure plate and a second pressure plate arranged parallel to the first pressure plate and connected to the reinforcing protective sleeve;

[0008] The second pressure plate can move up and down relative to the first pressure plate.

[0009] Furthermore, the first pressure plate and the second pressure plate are provided with adjusting rods, the adjusting rods are fixedly connected to the second pressure plate, and the adjusting rods are connected to the first pressure plate by threaded engagement;

[0010] The first pressure plate and the second pressure plate are also provided with guide rods. The guide rods are fixedly connected to the second pressure plate and are movably connected in series with the first pressure plate.

[0011] Furthermore, the adjusting rod is made of a threaded high-temperature resistant material, which may be stainless steel or ceramic.

[0012] Furthermore, a channel hole for cooperating with a connecting screw is fixedly opened at the center position of the first pressure plate. The first pressure plate contacts the stopper rod body and is fastened to the end face of the stopper rod body by bolts.

[0013] The connecting screw extends into the channel cavity of the stopper rod body and is fixed to the upper end of the stopper rod body with the embedded part. The embedded part is integrally formed with the stopper rod body and is a cavity groove structure with internal threads that cooperates with the connecting screw.

[0014] Furthermore, the reinforcing protective sleeve is a sleeve structure that cooperates with the stopper rod body. The reinforcing protective sleeve has a concentric hole at the point where it cooperates with the second pressure plate. The reinforcing protective sleeve is fixed to the second pressure plate of the height adjustment device by a pin.

[0015] Furthermore, the reinforcing protective sleeve is a sleeve structure that mates with the stopper rod body. The reinforcing protective sleeve and the stopper rod body have concentric holes at their mating points. The reinforcing protective sleeve and the second pressure plate of the height adjustment device are fixed together by embedded parts.

[0016] The embedded part has a cavity structure with internal threads, and the embedded part is integrally formed with the reinforcing protective sleeve.

[0017] Furthermore, the reinforced protective sleeve can be moved up and down along the stopper rod body under the action of the adjusting rod of the height adjusting device.

[0018] An application of a movable slag line reinforcing sleeve is to apply the adjustment and protection device to the temperature measuring tube or to the quick-change immersion nozzle, external immersion nozzle, long nozzle, or internal immersion nozzle.

[0019] When the adjusting and protective device is applied to the temperature measuring tube, the connection and fixing method is the same as the fixing method of the stopper rod body;

[0020] When the adjusting and protective device is applied to quick-change submersible inlets, external submersible inlets, and long inlets, the first pressure plate and the second pressure plate in the height adjusting device form a through channel that matches the outer diameter of the quick-change submersible inlet, external submersible inlet, and long inlet.

[0021] The height adjustment device is connected to the quick-change submersible inlet, the external submersible inlet, and the long inlet by welding the first pressure plate in the height adjustment device to the outer circumference of the quick-change submersible inlet, the external submersible inlet, and the long inlet.

[0022] When the adjustable protective device is applied to the internal submersible nozzle, the first pressure plate and the second pressure plate in the height adjustment device form a through channel that matches the outer diameter of the internal submersible nozzle. The first pressure plate in the height adjustment device is welded to the outer circumference of the internal submersible nozzle, or a steel structure connector is welded to the outside of the first pressure plate and fixedly welded to the bottom of the intermediate bale.

[0023] A method for applying the aforementioned movable slag line reinforcing sleeve includes the following steps;

[0024] The reinforced protective sleeve and height adjustment device are installed on the stopper rod body. The center position of the first pressure plate of the height adjustment device is fixedly provided with a channel hole that cooperates with the connecting screw. The connecting screw passes through the channel hole, causing the first pressure plate to contact the stopper rod body, and the first pressure plate is fastened to the end face of the stopper rod body by bolts.

[0025] The connecting screw extends into the channel cavity of the stopper rod body and is fixed with the embedded part at the upper end of the stopper rod body. The embedded part is integrally formed with the stopper rod body and is a cavity groove structure with internal threads that mates with the connecting screw.

[0026] The lifting device is connected by a connecting screw to lower the stopper rod body into the tundish. The height adjustment device does not contact the working fluid surface of the tundish, or the connection between the reinforced protective sleeve and the height adjustment device does not contact the working fluid surface of the tundish.

[0027] When the reinforced protective sleeve below the working fluid level in the tundish is corroded, the adjusting rod on the height adjustment device is adjusted to cause the reinforced protective sleeve to move down as a whole to protect the stopper rod.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] The movable reinforcing sleeve of this invention can significantly increase the service life of tundish refractory materials and reduce the consumption of tundish refractory materials per ton of steel. Compared with the prior art, the stopper rod cannot be replaced midway, and its life and the slag line life of the submerged nozzle directly determine the service life of the tundish. By using the movable slag line reinforcing sleeve to improve the service life of the original stopper rod and submerged nozzle, the number of tundish replacements is reduced, thereby reducing the wear of refractory materials such as stopper rods and nozzles during each replacement. At the same time, it also reduces the additional corrosion caused by frequent start-ups and replacements of the tundish body working lining, and significantly reduces the consumption of refractory materials per ton of steel.

[0030] The movable reinforcing sleeve of this invention improves steelmaking quality. Its application ensures the slag line maintains its erosion resistance under long-term stable liquid level conditions, extends the residence time and temperature of molten steel in the tundish, facilitates the collision, aggregation, and floating of inclusions in the molten steel, improving steel purity. Simultaneously, it ensures the stability of billet quality. Manually replacing short-life nozzles easily causes liquid level fluctuations, affecting the uniformity of billet quality. Extending the slag line life reduces the frequency of nozzle replacement, avoiding liquid level fluctuations and nozzle deviation problems, thus improving the surface quality of the billet.

[0031] The movable reinforcing sleeve of the present invention helps to reduce production costs. On the one hand, the reduced consumption of refractory steel per ton directly reduces the cost of refractory procurement; on the other hand, the extended continuous pouring time of the tundish reduces the consumption of gas for baking the tundish and the labor cost of masonry construction.

[0032] The movable reinforcing sleeve of this invention helps improve production efficiency, and the extended slag line life significantly increases the continuous casting operation rate, avoiding production interruptions caused by frequent stoppages for casting and ladle changes. Enhanced production continuity allows for smoother connections between steelmaking and continuous casting processes, increasing the overall production line capacity and thus improving the company's production efficiency.

[0033] The movable reinforcing sleeve of this invention extends the lifespan of the stopper rod nozzle, reducing the frequency of tundish replacement. This not only lowers gas consumption during ladle baking but also reduces the amount of waste refractory material generated. Both refractory material production and waste disposal consume energy and produce pollution. Reducing refractory material wear is equivalent to reducing carbon and pollutant emissions from related processes, aligning with the steel industry's carbon reduction goals and improving production safety and the working environment. Insufficient slag line lifespan can easily lead to safety accidents during steel casting. The movable slag line reinforcing sleeve, by extending the slag line lifespan, ensures a stable refractory structure, avoiding such safety hazards. Simultaneously, the reduced frequency of tundish construction and replacement lowers the labor intensity of workers in high-temperature environments, reduces safety risks during construction, and improves the on-site working environment. Furthermore, high-quality steel can meet the demands of high-end manufacturing, enhance the market competitiveness of domestic steel enterprises, and promote high-quality development in the metallurgical industry. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the connection between the adjusting protective device and the stopper rod body of the present invention;

[0035] Figure 2 This is a three-dimensional schematic diagram of the height adjustment device of the present invention;

[0036] Figure 3 This is the present invention. Figure 1 Application status diagram;

[0037] Figure 4 This is a schematic diagram of the height adjustment device of the present invention applied to a temperature measuring tube;

[0038] Figure 5 This is the present invention. Figure 4 Application diagram in the middleware package;

[0039] Figure 6 This is a schematic diagram of the application of the adjustment and protection device of the present invention in a quick-change immersion water inlet;

[0040] Figure 7 This is a schematic diagram of the application of the adjustment and protection device of the present invention in an internal immersion water inlet;

[0041] Figure 8 This is a schematic diagram of the application of the adjustment and protection device of the present invention in a long water outlet. Detailed Implementation

[0042] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Specific Implementation Example 1:

[0046] like Figure 1-3 As shown, a movable slag line reinforcing sleeve includes a stopper rod body 1, a connecting screw 2 is provided inside the stopper rod body 1, and an adjustment and protection device 3 is provided on the stopper rod body 1. The adjustment and protection device 3 includes a reinforcing protective sleeve 4 and a height adjustment device 6 connected to the reinforcing protective sleeve 4 by a pin or a pre-embedded part 5.

[0047] The stopper rod 1 and the adjusting and protective device 3 extend below the working fluid level of the tundish, and the height adjusting device 6 does not contact the working fluid level of the tundish or the connection between the reinforcing protective sleeve 4 and the height adjusting device 6 does not contact the working fluid level of the tundish.

[0048] To facilitate the adjustment of the reinforced protective sleeve during use via the height adjustment device, the height adjustment device 5 includes a first pressure plate 7 and a second pressure plate 8 arranged parallel to the first pressure plate 7 and connected to the reinforced protective sleeve 4;

[0049] The second pressure plate 8 can move up and down relative to the first pressure plate 7.

[0050] The first pressure plate 7 and the second pressure plate 8 are provided with adjusting rods 9, the adjusting rods 9 are fixedly connected to the second pressure plate 8, and the adjusting rods 9 and the first pressure plate 7 are connected by threaded engagement;

[0051] The first pressure plate 7 and the second pressure plate 8 are also provided with guide rods 10. The guide rods 10 are fixedly connected to the second pressure plate 8 and are movably connected to the first pressure plate 7 in series.

[0052] The adjusting rod 9 is made of a threaded high-temperature resistant material, which can be stainless steel or ceramic.

[0053] The first pressure plate 7 has a channel hole 11 fixedly opened at the center position to cooperate with the connecting screw 2. The first pressure plate 7 contacts the stopper rod body 1 and is fastened to the end face of the stopper rod body 1 by bolts.

[0054] The connecting screw 2 extends into the channel cavity of the stopper rod body 1 and is fixed to the upper end of the stopper rod body 1 with the embedded part 5. The embedded part 5 is integrally formed with the stopper rod body 1 and is a cavity structure with internal threads that cooperates with the connecting screw 2. When fixed, it is connected and fixed to the embedded part by bolts.

[0055] The reinforcing protective sleeve 4 is a sleeve structure that cooperates with the stopper rod body 1. The reinforcing protective sleeve 4 has a concentric hole at the point where it cooperates with the second pressure plate 8. The reinforcing protective sleeve 4 and the second pressure plate 8 of the height adjustment device 6 are fixed by a pin.

[0056] The reinforcing protective sleeve 4 is a sleeve structure that cooperates with the stopper rod body 1. The reinforcing protective sleeve 4 and the stopper rod body 1 have concentric holes. The reinforcing protective sleeve 4 and the second pressure plate 8 of the height adjustment device 6 are fixed by the embedded part 5.

[0057] The embedded part 5 has a cavity structure with internal threads, and the embedded part 5 is integrally formed with the reinforcing protective sleeve 4.

[0058] In the above embodiment, the reinforced protective sleeve 4 can be driven to move up and down along the stopper rod 1 under the action of the adjusting rod 9 of the height adjusting device 6. Specific Implementation Example 2:

[0060] like Figure 4-5 As shown, unlike Embodiment 1, the adjustment and protection device 3 is applied to the temperature measuring tube. When the movable slag line reinforcing sleeve is applied to the temperature measuring tube, the connection and fixing method is the same as the fixing method of the stopper rod body.

[0061] An integrally formed embedded part is installed inside the temperature measuring tube, and it is connected to the embedded part by a connecting screw.

[0062] The first pressure plate 7 has a channel hole 11 fixedly opened at the center position to cooperate with the connecting screw 2. The first pressure plate 7 contacts the temperature measuring tube and is fastened to the end face of the temperature measuring tube by bolts.

[0063] The connecting screw 2 extends into the channel cavity of the temperature measuring tube and is fixed to the upper end of the temperature measuring tube with the embedded part 5. The embedded part 5 is integrally formed with the temperature measuring tube 1, and the embedded part 5 is a cavity structure with internal threads that cooperates with the connecting screw 2. When fixed, it is connected and fixed to the embedded part by bolts.

[0064] Another connection method is that the reinforcing protective sleeve 4 is a sleeve structure that cooperates with the temperature measuring tube. The reinforcing protective sleeve 4 has a concentric hole at the point where it cooperates with the second pressure plate 8. The reinforcing protective sleeve 4 and the second pressure plate 8 of the height adjustment device 6 are fixed by a pin.

[0065] When the temperature measuring tube is fitted with the cover of the intermediate tundish, a through hole is provided on the cover of the intermediate tundish. A disc with a central through hole is connected in series with the connecting screw 2, so that the disc and the cover of the intermediate tundish are in contact and fitted. The diameter of the disc is larger than the diameter of the central through hole, and each disc is provided with a through hole that fits with the adjusting rod and the guide rod. The adjusting rod and the guide rod pass through the through hole. Specific Implementation Example 3:

[0067] like Figure 6 As shown, unlike Embodiment 1, the adjustment and protection device 3 is applied to the quick-change immersion nozzle;

[0068] When the adjusting and protective device 3 is applied to the quick-change submersible nozzle, the first pressure plate 7 and the second pressure plate 8 in the height adjusting device 5 form a through channel that matches the outer diameter of the quick-change submersible nozzle.

[0069] The height adjustment device 5 is connected to the quick-change submersible nozzle by welding the first pressure plate 7 in the height adjustment device 5 to the outer circumference of the quick-change submersible nozzle. Specific Implementation Example 4:

[0071] like Figure 7 As shown, unlike Embodiment 1, the adjusting protective device 3 is applied to the internal submersible water inlet. When the adjusting protective device 3 is applied to the internal submersible water inlet, the first pressure plate 7 and the second pressure plate 8 in the height adjusting device 5 form a through channel that matches the outer diameter of the internal submersible water inlet.

[0072] The connection method between the height adjustment device 5 and the internal submersible nozzle includes welding the first pressure plate 7 in the height adjustment device 5 to the outer circumference of the internal submersible nozzle, or welding a steel structure connector to the outside of the first pressure plate 7 and fixing it to the bottom of the intermediate bale. Specific Implementation Example 5:

[0074] Unlike Embodiment 1, the adjusting and protective device 3 is applied to the external submersible water inlet. When the adjusting and protective device 3 is applied to the external submersible water inlet, the first pressure plate 7 and the second pressure plate 8 in the height adjusting device 5 form a through channel that matches the outer diameter of the external submersible water inlet.

[0075] The external submersible inlet and the quick-change submersible inlet are fixed in the same way. Specific Implementation Example Six:

[0077] like Figure 8 As shown, unlike Embodiment 1, the adjusting and protective device 3 is applied to the long nozzle between the ladle and the intermediate ladle. The long nozzle is applied between the ladle and the intermediate ladle. The first pressure plate 7 and the second pressure plate 8 in the height adjusting device 5 form a through channel that matches the outer diameter of the long nozzle.

[0078] The height adjustment device 5 is connected to the long water inlet by welding the first pressure plate 7 in the height adjustment device 5 to the outer circumference of the long water inlet.

[0079] The long nozzle is used between the ladle and the tundish, and is connected and fixed to the ladle by a lifting and fixing device disclosed in the prior art. Specific Implementation Example 7:

[0081] A method for applying a movable slag line reinforcing sleeve includes the following steps; taking a stopper rod as an example:

[0082] The reinforced protective sleeve and height adjustment device are installed on the stopper rod body. The center position of the first pressure plate of the height adjustment device is fixedly provided with a channel hole that cooperates with the connecting screw. The connecting screw passes through the channel hole, causing the first pressure plate to contact the stopper rod body, and the first pressure plate is fastened to the end face of the stopper rod body by bolts.

[0083] The connecting screw extends into the channel cavity of the stopper rod body and is fixed with the embedded part at the upper end of the stopper rod body. The embedded part is integrally formed with the stopper rod body and is a cavity groove structure with internal threads that mates with the connecting screw.

[0084] The lower part of the stopper rod is lowered into the tundish by connecting the lifting device via the connecting screw (which is a prior art form and will not be described in detail here). The height adjustment device does not contact the working fluid surface of the tundish, or the connection between the reinforced protective sleeve and the height adjustment device does not contact the working fluid surface of the tundish.

[0085] When the reinforced protective sleeve below the working fluid level in the tundish is corroded, the adjusting rod on the height adjustment device is adjusted to cause the reinforced protective sleeve to move down as a whole to protect the stopper rod.

[0086] The operation method of installing the reinforced protective sleeve and height adjustment device on the temperature measuring tube, quick-change immersion nozzle, external immersion nozzle, and internal immersion nozzle is the same as that used on the stopper rod body.

[0087] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0088] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A movable slag line reinforcing sleeve, comprising a stopper rod body (1), wherein a connecting screw (2) is disposed inside the stopper rod body (1), characterized in that: The stopper rod body (1) is provided with an adjustment and protection device (3), which includes a reinforced protective sleeve (4) and a height adjustment device (6) connected to the reinforced protective sleeve (4) by a pin or a pre-embedded part (5). The stopper rod (1) and the adjusting and protective device (3) extend below the working fluid surface of the intermediate drum, and the height adjusting device (6) does not contact the working fluid surface of the intermediate drum or the connection between the reinforcing protective sleeve (4) and the height adjusting device (6) does not contact the working fluid surface of the intermediate drum.

2. The movable slag line reinforcing sleeve according to claim 1, characterized in that: The height adjustment device (5) includes a first pressure plate (7) and a second pressure plate (8) arranged parallel to the first pressure plate (8) and connected to the reinforcing protective sleeve (4); The second pressure plate (8) can move up and down relative to the first pressure plate (7).

3. The movable slag line reinforcing sleeve according to claim 2, characterized in that: Adjusting rods (9) are provided on the first pressure plate (7) and the second pressure plate (8). The adjusting rods (9) are fixedly connected to the second pressure plate (8), and the adjusting rods (9) are connected to the first pressure plate (7) by threaded engagement. The first pressure plate (7) and the second pressure plate (8) are also provided with guide rods (10), the guide rods (10) are fixedly connected to the second pressure plate (8), and the guide rods (10) are movably connected to the first pressure plate (7) in series.

4. The movable slag line reinforcing sleeve according to claim 3, characterized in that: The adjusting rod (9) is made of a threaded high-temperature resistant material, which is stainless steel or ceramic.

5. The movable slag line reinforcing sleeve according to claim 4, characterized in that: The first pressure plate (7) has a channel hole (11) fixedly opened at the center position to cooperate with the connecting screw (2). The first pressure plate (7) contacts the stopper rod body (1) and is fastened to the end face of the stopper rod body (1) by bolts. The connecting screw (2) extends into the channel cavity of the stopper rod body (1) and is fixed to the upper end of the stopper rod body (1) with the embedded part (5). The embedded part (5) is integrally formed with the stopper rod body (1) and the embedded part (5) is a cavity structure with internal threads that cooperates with the connecting screw (2).

6. The movable slag line reinforcing sleeve according to claim 4, characterized in that: The reinforced protective sleeve (4) is a sleeve structure that cooperates with the stopper rod body (1). The reinforced protective sleeve (4) has a concentric hole at the point where it cooperates with the second pressure plate (8). The reinforced protective sleeve (4) is fixed to the second pressure plate (8) of the height adjustment device (6) by a pin.

7. The movable slag line reinforcing sleeve according to claim 4, characterized in that: The reinforced protective sleeve (4) is a sleeve structure that cooperates with the stopper rod body (1). The reinforced protective sleeve (4) and the stopper rod body (1) are provided with concentric holes. The reinforced protective sleeve (4) and the second pressure plate (8) of the height adjustment device (6) are fixed by the embedded part (5). The embedded part (5) is a cavity structure with internal threads, and the embedded part (5) is integrally formed with the reinforcing protective sleeve (4).

8. The movable slag line reinforcing sleeve according to claim 6 or 7, characterized in that: The reinforced protective sleeve (4) can move up and down along the stopper rod (1) under the action of the adjusting rod (9) of the height adjusting device (6).

9. An application of the movable slag line reinforcing sleeve according to claim 8, characterized in that: Apply the adjustment and protection device (3) to the temperature measuring tube or apply the adjustment and protection device (3) to the quick-change immersion water inlet, the external immersion water inlet, the long water inlet, or the internal immersion water inlet. When the adjusting protective device (3) is applied to the temperature measuring tube, the connection and fixing method is the same as the fixing method of the stopper rod body; When the adjusting and protective device (3) is applied to quick-change submersible inlet, external submersible inlet, and long inlet, the first pressure plate (7) and the second pressure plate (8) in the height adjusting device (5) form a through channel that matches the outer diameter of the quick-change submersible inlet, external submersible inlet, and long inlet. The height adjustment device (5) is connected to the quick-change submersible inlet, the external submersible inlet, and the long inlet by welding the first pressure plate (7) in the height adjustment device (5) to the outer circumference of the quick-change submersible inlet, the external submersible inlet, and the long inlet. When the adjusting protective device (3) is applied to the internal submersible nozzle, the first pressure plate (7) and the second pressure plate (8) in the height adjusting device (5) form a through channel that matches the outer diameter of the internal submersible nozzle. The first pressure plate (7) in the height adjusting device (5) is welded to the outer circumference of the internal submersible nozzle, or the steel structure connector on the outside of the first pressure plate (7) is fixedly welded to the bottom of the intermediate bag.

10. A method for applying the movable slag line reinforcing sleeve according to claim 8, characterized in that: Includes the following steps; The reinforced protective sleeve and height adjustment device are installed on the stopper rod body. The center position of the first pressure plate of the height adjustment device is fixedly provided with a channel hole that cooperates with the connecting screw. The connecting screw passes through the channel hole, causing the first pressure plate to contact the stopper rod body, and the first pressure plate is fastened to the end face of the stopper rod body by bolts. The connecting screw extends into the channel cavity of the stopper rod body and is fixed with the embedded part at the upper end of the stopper rod body. The embedded part is integrally formed with the stopper rod body and is a cavity groove structure with internal threads that mates with the connecting screw. The lifting device is connected by a connecting screw to lower the stopper rod body into the tundish. The height adjustment device does not contact the working fluid surface of the tundish, or the connection between the reinforced protective sleeve and the height adjustment device does not contact the working fluid surface of the tundish. When the reinforced protective sleeve below the working fluid level in the tundish is corroded, the adjusting rod on the height adjustment device is adjusted to cause the reinforced protective sleeve to move down as a whole to protect the stopper rod.

Images