A tundish stopper for a continuous caster and a continuous caster

Abstract

The present disclosure relates to the technical field of steel smelting, and particularly relates to a tundish stopper of a continuous casting machine and the continuous casting machine, the tundish stopper of the continuous casting machine comprising: a stopper body, the stopper body being divided into a handle section, a body section and a head connecting section from top to bottom; a slag line protection assembly, the slag line protection assembly comprising a thickened layer and a sleeve, the thickened layer being arranged on the outer wall of the body section at the slag line position of the tundish stopper, and the sleeve being detachably sleeved on the outer wall of the thickened layer; and a stopper head, the stopper head being connected to the bottom end of the head connecting section. The tundish stopper of the continuous casting machine of the present disclosure realizes double-layer protection of the body section at the slag line position through the thickened layer and the sleeve of the slag line protection assembly, improves the corrosion resistance of the body at the slag line position, and avoids the problem that the tundish stopper is prone to breaking at the slag line position.

Description

Technical Field

[0001] This disclosure relates to the field of iron and steel smelting technology, and in particular to a tundish stopper rod for a continuous casting machine and a continuous casting machine. Background Technology

[0002] The tundish stopper rod is a crucial component of a continuous casting machine, primarily used to precisely regulate the flow rate of molten steel from the tundish into the mold. Its core function is to ensure the stability, safety, and billet quality of the continuous casting process. During continuous casting, the slag line of the tundish stopper rod has weak erosion resistance. Often, severe erosion of the slag line by the molten steel can prevent continuous casting, and in severe cases, excessive erosion can cause the tundish stopper rod to break off at the slag line, resulting in on-site production accidents and significant economic losses.

[0003] Therefore, how to improve the resistance of the tundish stopper rod to molten steel corrosion at the slag line and avoid the tundish stopper rod breaking at the slag line is a problem that needs to be solved by those skilled in the art. Utility Model Content

[0004] To address the aforementioned technical problems, this disclosure provides a tundish stopper rod for a continuous casting machine and a continuous casting machine, thereby solving the problem in the prior art where the tundish stopper rod is prone to breakage at the slag line due to erosion by molten steel.

[0005] To address the aforementioned technical problems, some embodiments of this disclosure provide a stopper rod for a continuous casting machine, comprising: a stopper rod body, which is divided from top to bottom into a shank section, a rod body section, and a rod head connecting section; a slag line protection assembly, which includes a thickened layer and a sleeve, wherein the thickened layer is disposed on the outer wall of the rod body section at the slag line position of the stopper rod in the tundish, and the sleeve is detachably fitted onto the outer wall of the thickened layer; and a stopper rod head, which is connected to the bottom end of the rod head connecting section.

[0006] In some embodiments, a vertical protrusion is provided on the outer wall of the thickened layer, and a vertical groove is provided on the inner wall of the sleeve. The vertical protrusion is disposed in the vertical groove to prevent the sleeve from rotating around the axial direction on the thickened layer.

[0007] In some embodiments, a locking mechanism is provided in the vertical groove to lock the vertical protrusion in the vertical groove to prevent the sleeve from sliding in the axial direction on the thickened layer.

[0008] In some embodiments, the locking mechanism includes two elastic plates, which are respectively disposed on two opposite sidewalls of the vertical groove to press the vertical protrusion into the vertical groove. In some embodiments, the slag line protection assembly further includes a positioning plate, which is sleeved on the rod at the bottom of the thickened layer, and the bottom of the sleeve abuts against the positioning plate.

[0009] In some embodiments, a lower sealing ring is provided between the positioning plate and the sleeve.

[0010] In some embodiments, an upper sealing ring is provided at the gap between the top of the thickened layer and the top of the sleeve.

[0011] In some embodiments, a first L-shaped groove is formed on the top wall of the thickened layer, and a second L-shaped groove is formed on the top wall of the sleeve. The first L-shaped groove and the second L-shaped groove are joined together to form an installation groove, and the upper sealing ring is disposed in the installation groove.

[0012] In some embodiments, a pull ring is provided on the top wall of the sleeve.

[0013] On the other hand, some embodiments of this disclosure also provide a continuous casting machine, including a lifting mechanism and the aforementioned tundish stopper rod of the continuous casting machine, wherein the lifting mechanism is connected to the top of the rod handle section to drive the tundish stopper rod to move up and down.

[0014] By adopting the above technical solution, this disclosure has at least the following beneficial effects: This disclosure provides a tundish stopper rod for a continuous casting machine and the continuous casting machine itself. The tundish stopper rod of the continuous casting machine achieves double-layer protection of the rod body at the slag line position through the thickened layer and sleeve of the slag line protection component, improving the erosion resistance of the rod body at the slag line position and avoiding the problem of the tundish stopper rod easily breaking at the slag line position. The cooperation of the vertical groove and the vertical convex strip prevents the sleeve from rotating around the axial direction on the thickened layer. The elastic plate of the locking mechanism prevents the sleeve from sliding along the axial direction. The upper sealing strip and the lower sealing strip prevent the molten steel from eroding the thickened layer. The positioning plate facilitates the positioning of the sleeve and also provides support for the sleeve. The mounting groove can fix the upper sealing ring in the gap between the sleeve and the upper part of the thickened layer to form a seal. The pull ring facilitates the operation of the operator. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a longitudinal sectional view of the intermediate packing stopper rod according to an embodiment of the present disclosure; Figure 2 This is a cross-sectional view of a slag line protection component according to an embodiment of the present disclosure; Figure 3 This is a cross-sectional view of the thickened layer according to an embodiment of the present disclosure; Figure 4 This is a cross-sectional view of a sleeve according to an embodiment of the present disclosure; Figure 5 This is a schematic diagram of an elastic sheet according to an embodiment of the present disclosure; Figure 6 This is a schematic diagram of a mounting slot according to an embodiment of the present disclosure.

[0017] Explanation of reference numerals in the attached figures: 1. Stopper rod body; 2. Slag line protection component; 3. Thickened layer; 4. Sleeve; 5. Positioning plate; 6. Stopper rod head; 7. Vertical protrusion; 8. Vertical groove; 9. Elastic sheet; 10. Lower sealing ring; 11. Upper sealing ring; 12. Mounting groove; 13. First L-shaped groove; 14. Second L-shaped groove. Detailed Implementation

[0018] The embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of this disclosure by way of example, but should not be used to limit the scope of this disclosure. This disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0019] These embodiments are provided to make the disclosure thorough and complete, and to fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0020] It should be noted that, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationship, are only for the convenience of describing this disclosure 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, and therefore should not be construed as a limitation of this disclosure. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] Furthermore, the terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after the word, and do not exclude the possibility of encompassing other elements as well.

[0022] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" 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 disclosure depending on the specific circumstances. When a particular device is described as being located between a first device and a second device, an intermediary device may or may not be present between the particular device and the first or second device.

[0023] All terms used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0024] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0025] As mentioned in the background section, during continuous steel casting, the slag line of the tundish stopper rod has weak erosion resistance. Often, the slag line is severely eroded by the molten steel, making continuous casting impossible. In severe cases, excessive erosion can cause the tundish stopper rod to break at the slag line, resulting in on-site production accidents and significant economic losses. Therefore, this disclosure provides a tundish stopper rod for a continuous casting machine and the continuous casting machine itself. The tundish stopper rod of the continuous casting machine achieves double-layer protection of the rod body at the slag line location through a thickened layer and a sleeve in the slag line protection component, improving the erosion resistance of the rod body at the slag line location and avoiding the problem of the tundish stopper rod easily breaking at the slag line location, thus solving one or more problems in the prior art.

[0026] This disclosure provides a stopper rod for the tundish of a continuous casting machine, such as... Figure 1 As shown, it includes: a stopper rod body 1, which is divided into a handle section, a body section and a head connecting section from top to bottom; a slag line protection component 2, which includes a thickened layer 3 and a sleeve 4. The thickened layer 3 is disposed on the outer wall of the body section and located at the slag line position of the stopper rod in the intermediate package. The sleeve 4 is detachably fitted onto the outer wall of the thickened layer 3; and a stopper rod head 6, which is connected to the bottom end of the head connecting section.

[0027] Specifically, the stopper rod body 1, consisting of a rod handle section, a rod body section, and a rod head connecting section, can be manufactured using a high-alumina refractory material through a molding process. The rod body section is integrally thickened to form a thickened layer 3 corresponding to the slag line position. An argon blowing cavity is formed along the axis of the stopper rod body 1. For example, if the diameter of the rod body section is 30mm and the thickness of the thickened layer 3 is 20mm, this is equivalent to a 50mm diameter rod body section at the slag line and a 30mm diameter rod body section at the non-slag line position. The sleeve 4 is made of magnesium refractory material, and anti-slip protrusions can be pressed onto its outer wall at intervals. For example, if the inner diameter of the sleeve 4 is 50mm, the height of the anti-slip protrusions can be 4mm. The stopper rod head 6 is also made of magnesium refractory material, with its lower end formed into an arc-shaped spherical surface. It can be bonded and fixed to the bottom end of the rod head connecting section using refractory adhesive. An argon blowing hole is formed on the side wall of the stopper rod head 6, and the argon blowing hole communicates with the argon blowing cavity.

[0028] This disclosure provides a stopper rod for a continuous casting machine's tundish. The stopper rod of the continuous casting machine achieves double-layer protection of the rod body at the slag line position through the thickened layer 3 of the slag line protection component 2 and the sleeve 4, which improves the erosion resistance of the rod body at the slag line position and avoids the problem of the tundish stopper rod easily breaking at the slag line position.

[0029] In some embodiments, such as Figure 2-4 As shown, the outer wall of the thickened layer 3 is provided with vertical protrusions 7, and correspondingly, the inner wall of the sleeve 4 is provided with vertical grooves 8. The vertical protrusions 7 are fitted into the vertical grooves 8 to prevent the sleeve 4 from rotating axially on the thickened layer 3. Specifically, there can be multiple vertical protrusions 7, and correspondingly multiple vertical grooves 8. For example, there are four vertical protrusions 7 and four vertical grooves 8. Furthermore, the vertical protrusions 7 can be integrally formed with the thickened layer 3. At the same time, the cooperation between the vertical grooves 8 and the vertical protrusions 7 also facilitates the installation and replacement of the sleeve 4.

[0030] In some embodiments, a locking mechanism is provided in the vertical groove 8 to lock the vertical protrusion 7 in the vertical groove 8 to prevent the sleeve 4 from sliding in the axial direction on the thickened layer 3.

[0031] In some embodiments, such as Figure 5 As shown, the locking mechanism includes two elastic plates 9, which are respectively disposed on two opposite side walls of the vertical groove 8 to press the vertical protrusion 7 into the vertical groove 8. Specifically, during the installation of the sleeve 4, the vertical protrusion 7 enters the groove, compressing the two opposite elastic plates 9 in the vertical groove 8 and causing them to deform. The elastic force generated by the deformation of the elastic plates 9 can press the vertical protrusion 7 into the vertical groove 8, thereby avoiding the problem of the sleeve 4 sliding in the axial direction on the thickened layer 3.

[0032] In some embodiments, such as Figure 1As shown, the slag line protection assembly 2 also includes a positioning plate 5, which is sleeved on the bottom of the thickened layer 3 rod body, and the bottom of the sleeve 4 abuts against the positioning plate 5. Specifically, the positioning plate 5 can be integrally formed with the stopper rod body 1. The positioning plate 5 facilitates the positioning of the sleeve 4 and also provides support for the sleeve 4.

[0033] In some embodiments, such as Figure 1 As shown, a lower sealing ring 10 is provided between the positioning plate 5 and the sleeve 4. The lower sealing ring 10 prevents molten steel from entering through the gap between the sleeve 4 and the lower part of the thickened layer 3 and corroding the thickened layer 3, thus further protecting the tundish stopper rod. Specifically, the lower sealing ring 10 can be a graphite sealing ring.

[0034] In some embodiments, such as Figure 1 As shown, an upper sealing ring 11 is provided at the gap between the top of the thickened layer 3 and the top of the sleeve 4. The upper sealing ring 11 prevents molten steel from entering through the gap between the sleeve 4 and the upper part of the thickened layer 3 and corroding the thickened layer 3, further protecting the tundish stopper rod. Specifically, the upper sealing ring 11 can also be a graphite sealing ring.

[0035] In some embodiments, such as Figure 6 As shown, a first L-shaped groove 13 is formed on the top wall of the thickened layer 3, and a second L-shaped groove 14 is formed on the top wall of the sleeve 4. The first L-shaped groove 13 and the second L-shaped groove 14 are joined to form an installation groove 12, and an upper sealing ring 11 is disposed in the installation groove 12. Specifically, the first L-shaped groove 13 and the second L-shaped groove 14 are joined to form an installation groove 12 with a trapezoidal cross-section. By installing the sealing ring 11 in the installation groove 12, the upper sealing ring 11 can be fixed at the gap between the sleeve 4 and the upper part of the thickened layer 3 to form a seal.

[0036] In some embodiments, a pull ring (not shown in the figure) is provided on the top wall of the sleeve 4. Specifically, two pull rings may be provided, and the two pull rings are arranged symmetrically. When replacing or installing the sleeve 4, the operator can use a hook tool to pull the pull rings to operate, which facilitates the installation and replacement of the sleeve 4.

[0037] In addition, this disclosure also provides a continuous casting machine, including a lifting mechanism and the aforementioned tundish stopper rod of the continuous casting machine, wherein the lifting mechanism is connected to the top of the rod handle section to drive the tundish stopper rod to move up and down.

[0038] This disclosure provides a tundish stopper rod for a continuous casting machine and the continuous casting machine itself. The tundish stopper rod of the continuous casting machine achieves double-layer protection of the rod body at the slag line position through the thickened layer 3 and sleeve 4 of the slag line protection component 2, improving the erosion resistance of the rod body at the slag line position and avoiding the problem of the tundish stopper rod easily breaking at the slag line position. The cooperation of the vertical groove 8 and the vertical protrusion 7 prevents the sleeve 4 from rotating around the axial direction on the thickened layer 3. The elastic piece 9 of the locking mechanism prevents the sleeve 4 from sliding along the axial direction. The upper sealing strip and the lower sealing strip prevent the molten steel from eroding the thickened layer 3. The positioning plate 5 facilitates the positioning of the sleeve 4 and also provides support for the sleeve 4. The mounting groove 12 can fix the upper sealing ring 11 in the gap between the sleeve 4 and the upper part of the thickened layer 3 to form a seal. The pull ring facilitates the operation of the operator.

[0039] The embodiments of this disclosure have now been described in detail. To avoid obscuring the concept of this disclosure, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0040] While specific embodiments of this disclosure have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner.

Claims

1. A stopper rod for a tundish in a continuous casting machine, characterized in that, include: The stopper rod body (1) is divided into a handle section, a body section and a head connecting section from top to bottom; A slag line protection assembly (2) includes a thickened layer (3) and a sleeve (4). The thickened layer (3) is disposed on the outer wall of the rod section, located at the slag line position of the intermediate plug rod. The sleeve (4) is detachably fitted onto the outer wall of the thickened layer (3). The stopper head (6) is connected to the bottom end of the head connecting section.

2. The tundish stopper rod of the continuous casting machine according to claim 1, characterized in that, The outer wall of the thickened layer (3) is provided with a vertical protrusion (7), and the inner wall of the sleeve (4) is provided with a vertical groove (8). The vertical protrusion (7) is provided in the vertical groove (8) to prevent the sleeve (4) from rotating around the axial direction on the thickened layer (3).

3. The tundish stopper rod of the continuous casting machine according to claim 2, characterized in that, A locking mechanism is provided in the vertical groove (8) to lock the vertical protrusion (7) in the vertical groove (8) to prevent the sleeve (4) from sliding in the axial direction on the thickened layer (3).

4. The tundish stopper rod of the continuous casting machine according to claim 3, characterized in that, The locking mechanism includes two elastic pieces (9), which are respectively disposed on two opposite side walls of the vertical groove (8) to press the vertical protrusion (7) into the vertical groove (8).

5. The tundish stopper rod of the continuous casting machine according to claim 4, characterized in that, The slag line protection assembly (2) also includes a positioning plate (5), which is sleeved on the rod at the bottom of the thickened layer (3), and the bottom of the sleeve (4) abuts against the positioning plate (5).

6. The tundish stopper rod of the continuous casting machine according to claim 5, characterized in that, A lower sealing ring (10) is provided between the positioning plate (5) and the sleeve (4).

7. The tundish stopper rod of the continuous casting machine according to claim 6, characterized in that, An upper sealing ring (11) is provided at the gap between the top of the thickened layer (3) and the top of the sleeve (4).

8. The tundish stopper rod of the continuous casting machine according to claim 7, characterized in that, The thickened layer (3) has a first L-shaped groove (13) on its top wall and the sleeve (4) has a second L-shaped groove (14) on its top wall. The first L-shaped groove (13) and the second L-shaped groove (14) are joined to form an installation groove (12). The upper sealing ring (11) is placed in the installation groove (12).

9. The tundish stopper rod of the continuous casting machine according to claim 8, characterized in that, A pull ring is provided on the top wall of the sleeve (4).

10. A continuous casting machine, characterized in that, The invention includes a lifting mechanism and a tundish stopper rod of a continuous casting machine as described in any one of claims 1-9, wherein the lifting mechanism is connected to the top of the rod handle section to drive the tundish stopper rod to move up and down.

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