Tundish cover for T-shaped tundish

Abstract

The utility model discloses a tundish cover for a T-shaped tundish, and belongs to the technical field of steelmaking continuous casting. The device comprises a middle cover and two side covers, the middle cover comprises a first steel structure assembly, a first anchoring assembly and a first fireproof pouring body, and the first steel structure assembly comprises a first connecting piece, two second connecting pieces and two third connecting pieces, the middles of the two second connecting pieces are fixedly connected with the two ends of the first connecting piece respectively, and the two second connecting pieces are arranged in a relatively inclined mode to form an opening end and a contracting end. The two third connecting pieces are arranged in the contraction end, the two third connecting pieces and the second connecting pieces are located in the same plane, the first anchoring assembly comprises a plurality of first anchoring pieces, the first anchoring pieces are connected with the first steel structure assembly, and the first steel structure assembly is filled with the first refractory casting body; the two side covers are symmetrically arranged on the two sides of the middle cover. According to the utility model, the stability and the deformation resistance of the whole structure can be enhanced.

Description

Technical Field

[0001] This utility model relates to the field of steelmaking continuous casting technology, and in particular to a ladle cover for a T-type tundish. Background Technology

[0002] In continuous casting systems, the tundish serves as a container for receiving molten steel from the ladle after refining, acting as a transitional vessel for continuous casting. The tundish primarily functions to reduce pressure, stabilize flow, remove inclusions, store, and divert molten steel. Its thermal state during production directly affects the temperature of the molten steel. To reduce temperature drop, methods such as intensifying tundish baking, improving tundish heat turnover, optimizing the tundish lining structure, adding insulating agents during molten steel transport, and covering the tundish's upper surface are commonly employed. Among these, using a tundish cover is a relatively simple and direct method.

[0003] The tundish cover sits directly on top of the tundish and operates cyclically together with it: baking – plugging – baking on the continuous casting platform – receiving molten steel – pouring steel – cooling on the continuous casting platform. The tundish cover plays a crucial role during operation: firstly, it prevents heat loss; secondly, it blocks heat radiation and splashes of molten steel or slag, protecting various equipment and improving the working environment.

[0004] The existing inner-layer cover has a relatively fragile structure, is prone to deformation or even damage, has a short service life, and has high manufacturing and usage costs. Utility Model Content

[0005] In view of this, it is necessary to provide a T-type intermediate bag cover to solve the problems of fragile structure and high cost of use of existing intermediate bag covers.

[0006] This utility model provides a T-shaped intermediate bag cover for covering the intermediate bag, comprising:

[0007] The middle cover includes a first steel structure component, a first anchoring component, and a first refractory castable body. The first steel structure component includes a first connector and two second connectors and two third connectors symmetrically arranged relative to the middle of the first connector. The middle portions of the two second connectors are fixedly connected to both ends of the first connector, and the two second connectors are inclined relative to each other to form an open end and a contracted end. The two third connectors are disposed in the contracted end and are located in the same plane as the second connectors. The third connectors are fixedly connected to the first connectors and are arranged perpendicular to the first connectors. The end of the third connector away from the first connector is connected to the second connector. The first anchoring component includes a plurality of first anchors, which are connected to the first connector, the second connectors, and the third connectors. The first refractory castable body is filled in the first steel structure component.

[0008] The two side covers are symmetrically arranged on both sides of the middle cover.

[0009] Furthermore, the first steel structure component also includes a first connecting plate and a second connecting plate, wherein the first connecting plate is connected to the ends of the two second connecting members and the ends of the two third connecting members respectively; and the second connecting plate is connected to the middle of the two second connecting members and the middle of the third connecting member respectively.

[0010] Furthermore, the first steel structure component also includes a T-shaped member, the first protruding end of which is connected to the second connector and the end away from the third connector, and the second protruding end of which is connected to the first connector.

[0011] Furthermore, the first, second, and third connecting members are I-beams.

[0012] Furthermore, a first baking hole is provided in the middle of the first refractory casting body.

[0013] Furthermore, the first steel structure component is provided with a plurality of first lifting lugs, which are symmetrically arranged and welded to the first steel structure component.

[0014] Furthermore, the side cover includes a second steel structure component, a second anchoring component, and a second refractory castable body. The second steel structure component includes a square frame adapted to the tundish, a transverse connector, and a longitudinal connector. Both ends of the longitudinal connector are connected to the square frame, one end of the transverse connector is connected to the longitudinal connector, and the other end of the transverse connector is connected to either the longitudinal connector or the square frame. The second anchoring component includes second anchors, and multiple second anchors are connected to the square frame, the transverse connector, and the longitudinal connector. The second refractory castable body is filled in the second steel structure component.

[0015] Furthermore, the second anchor is Y-shaped.

[0016] Furthermore, the second refractory casting body is provided with a steel flow hole and a second baking hole, which are located in the middle of the second refractory casting body.

[0017] Furthermore, the square frame is provided with a plurality of second lifting lugs, which are symmetrically arranged and welded to the square frame.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] (1) A T-shaped intermediate bag cover of this utility model is provided with a middle cover. The middle cover includes a first steel structure component. The first steel structure component includes a first connector, two second connectors, and two third connectors. The two second connectors are symmetrically arranged with respect to the middle of the first connector, and the two third connectors are symmetrically arranged with respect to the middle of the first connector. The middle parts of the two second connectors are respectively fixedly connected to the two ends of the first connector. The two second connectors are inclined relative to each other to form an open end and a contracted end. At the contracted end, the two second connectors and the first connector form a semi-sealed space. The two third connectors are arranged in the sealed space and are located in the same plane as the second connectors. The third connectors are fixedly connected to the first connectors and are arranged perpendicular to the first connectors. The end of the third connector away from the first connector is connected to the second connector. The first connector, the two second connectors, and the two third connectors are interconnected to form a stable and sturdy frame, which can enhance the stability and deformation resistance of the entire structure.

[0020] (2) A T-shaped intermediate bag cover of the present invention is provided with an intermediate cover. The intermediate cover includes a first anchoring component and a first refractory castable body. The first anchoring component includes multiple first anchors. The first anchors are connected to a first connector, a second connector and a third connector. The first anchors can extend outward relative to each other, extending the range of action of the first connector, the second connector and the third connector. The first refractory castable body is filled in the first steel structure component. The first anchors are embedded in the first refractory castable body. The refractory castable body can not only improve the fire resistance of the bag cover, but also, through the first anchors, enable the thermal expansion and contraction stress of the intermediate cover to be evenly distributed in the high temperature environment, reducing the deformation or damage caused by thermal stress. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the middle cover in this utility model;

[0024] Figure 3 This is a schematic diagram of the side cover structure in this utility model.

[0025] In the diagram, 100 is the middle cover; 110 is the first steel structure component; 111 is the first connector; 112 is the second connector; 113 is the third connector; 114 is the first connecting plate; 115 is the second connecting plate; 116 is the T-shaped component; 117 is the first lifting lug; 120 is the first anchoring component; 121 is the first anchor; 130 is the first refractory castable; and 131 is the first baking hole.

[0026] 200, Side cover; 210, Second steel structure component; 211, Square frame; 211a, Second lifting lug; 212, Transverse connector; 213, Longitudinal connector; 220, Second anchoring component; 221, Second anchor; 230, Second refractory castable; 231, Flowing steel hole; 232, Second baking hole. Detailed Implementation

[0027] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0028] This embodiment of a T-shaped tundish cover relates to the field of steelmaking continuous casting technology. By dividing the entire cover into a central cover 100 and two side covers 200, the weight of the individual cover can be reduced, and the maintenance and replacement of the individual cover can be facilitated. At the same time, the first steel structure component 110 of the central cover 100 can enhance the overall structural strength of the central cover 100 and extend its service life.

[0029] Please see Figures 1 to 3 This embodiment describes a T-shaped tundish cover, which is used to cover the tundish and prevent molten steel from splashing out. The cover includes a central cover 100 and two side covers 200. The central cover 100 is located in the middle of the tundish, directly facing the pouring gate. The side covers 200 can be assembled with the central cover 100 to seal the opening of the tundish.

[0030] The middle cover 100 includes a first steel structure component 110, a first anchoring component 120, and a first refractory castable body 130. The first steel structure component 110 includes a first connector 111, two second connectors 112, and two third connectors 113. The two second connectors 112 are symmetrically arranged with respect to the middle of the first connector 111, and the two third connectors 113 are symmetrically arranged with respect to the middle of the first connector 111. The middle parts of the two second connectors 112 are respectively fixedly connected to the two ends of the first connector 111. The two second connectors 112 are arranged at an angle to each other to form an open end and a contracted end. At the contraction end, the two second connectors 112 and the first connector 111 form a semi-sealed space. The two third connectors 113 are disposed in the sealed space and are located in the same plane as the second connectors. The third connectors 113 are fixedly connected to the first connectors 111 and are disposed perpendicular to the first connectors 111. The end of the third connector 113 away from the first connector 111 is connected to the second connector 112. The first connector 111, the two second connectors 112 and the two third connectors 113 are interconnected to form a stable and robust frame, which can enhance the stability and deformation resistance of the entire structure.

[0031] The first anchoring component 120 includes a plurality of first anchors 121. The first anchors 121 are connected to the first connector 111, the second connector 112 and the third connector 113. The first anchors 121 can extend outward relative to each other, extending the range of action of the first connector 111, the second connector 112 and the third connector 113. The first refractory castable 130 is filled in the first steel structure component 110. The first anchors 121 are embedded in the first refractory castable 130. The refractory castable can not only improve the thermal insulation of the cover, but also, through the first anchors 121, make the thermal expansion and contraction stress of the middle cover 100 in the high temperature environment evenly distributed, reducing the deformation or damage caused by thermal stress.

[0032] The two side covers 200 are symmetrically arranged on both sides of the middle cover 100, which can work together with the middle cover 100 to shield the tundish and prevent molten steel from splashing.

[0033] In some embodiments, please refer to Figure 2The first steel structure component 110 also includes a first connecting plate 114 and a second connecting plate 115. The first connecting plate 114 is connected to the ends of the two second connecting members 112 and the ends of the two third connecting members 113, respectively. The second connecting plate 115 is connected to the middle portions of the two second connecting members 112 and the middle portions of the third connecting members 113, respectively. In summary, the first connecting plate 114 and the second connecting plate 115 are connected to different parts of the second connecting members 112 and the third connecting members 113, respectively, thereby forming a more compact and stable frame structure. The frame structure allows the entire cover frame to evenly distribute and withstand the pressure from molten steel pouring, vibration, and other external forces, thereby improving the overall stability of the structure and preventing deformation or damage caused by excessive local stress.

[0034] As part of the frame structure, the second connecting plate 115 connects the second connecting member 112 and the third connecting member 113 at their midpoints, making the stress points of the entire cover structure more reasonable and avoiding stress concentration. The entire structure can remain stable under large working loads, reducing damage caused by excessive local stress.

[0035] Furthermore, the first connecting plate 114 and the second connecting plate 115 enhance the overall rigidity of the ladle cover by reinforcing the intermediate structural portion. Increased rigidity means the ladle cover can better maintain its shape and dimensions, preventing deformation in high-temperature and molten steel operating environments, thereby extending its service life.

[0036] In some embodiments, please continue reading Figure 2 The first steel structure component 110 also includes a T-shaped member 116. The first protruding end of the T-shaped member 116 is connected to the end of the second connector 112 that is away from the third connector 113. The second protruding end of the T-shaped member 116 is connected to the first connector 111. The addition of the T-shaped member 116 provides additional support points on the basis of the original connection structure, thereby improving the structural stability of the first steel structure component 110.

[0037] In the specific implementation process, the first protruding end and the third protruding end are inclined relative to the first protruding end. Through the connection of the first protruding end with the second connecting member 112 and the third connecting member 113, and the connection of the second protruding end with the first connecting member 111, a multi-point fixed connection system is formed. The multi-point fixed connection system effectively disperses the stress points of the tundish cover when subjected to external forces (such as molten steel pouring, equipment vibration, etc.), avoids stress concentration, and thus improves the deformation resistance of the overall structure.

[0038] The first connector 111, the two second connectors 112, and the two third connectors 113 can be interconnected to form a stable and robust frame, strengthening the structure of the middle cover 100 and enabling it to withstand greater loads. Simultaneously, the T-shaped member 116, by increasing the connection, further enhances the structure of the middle cover 100, significantly improving its load-bearing capacity under conditions of molten steel casting, vibration, and other external forces.

[0039] In some embodiments, the first anchoring assembly 120 further includes a first anchoring sub-assembly, the size of which is smaller than that of the first anchor 121. The first anchoring sub-assembly is connected to the first connector 111, the second connector 112, and the third connector 113. The first anchoring sub-assembly can be disposed in a narrow area between the T-shaped member 116, the first connecting plate 114, the second connecting plate 115, the first connector 111, the second connector 112, and the third connector 113, and plays the same role as the first anchor 121.

[0040] Both the first anchor 121 and the first anchoring component are V-shaped, and the first anchor 121 and the first anchoring component have at least two bifurcated portions. The bifurcated portions can provide multiple support forces, avoid stress concentration in a single direction, and thus improve the structural stability and spalling resistance of the first refractory castable 130.

[0041] It should be further noted that the first connector 111, the second connector 112, and the third connector 113 are H-beams. The thickness of the middle connecting part of the H-beam cross-section is 20mm, and the thickness of the two abutting parts is 10mm. Compared with existing ordinary H-beams, they have excellent bending resistance. Their cross-sectional shape has a large moment of inertia, which allows the H-beam to effectively distribute the load when subjected to external forces, making them particularly suitable for lateral support of structural components. In the middle cover 100, the use of H-beams as connectors can significantly improve the load-bearing capacity of the entire structure, enabling it to withstand greater weight and external impacts.

[0042] Meanwhile, due to its special cross-sectional design, I-beams exhibit high rigidity when subjected to pressure or bending forces. By using I-beams in the connectors, the rigidity of the overall frame of the enclosure can be effectively improved, preventing excessive deformation or loosening under prolonged high temperature and high pressure conditions.

[0043] In some embodiments, please refer to Figure 1A first baking hole 131 is provided in the middle of the first refractory casting 130. During the baking process, hot air can flow more smoothly through the first baking hole and quickly reach the middle of the refractory casting, allowing the first refractory casting 130 to reach the ideal working temperature in a short time, thus improving baking efficiency. The first baking hole 131 also allows hot air or airflow to be evenly distributed in the middle of the refractory casting, effectively avoiding heat concentration in a small area, thereby reducing lining damage or cracks caused by uneven temperature.

[0044] In the specific implementation process, refractory castable is filled into the structure composed of the first steel structure component 110 and the first anchoring component 120. The first baking hole 131 is reserved through the mold, and then the refractory castable is naturally cured or baked to form a refractory castable containing the first baking hole 131.

[0045] In some embodiments, please refer to Figure 2 The first steel structure component 110 is equipped with multiple first lifting lugs 117. These first lifting lugs 117 are symmetrically arranged and welded to the first steel structure component 110, which can ensure that the force is evenly distributed during the hoisting process and prevent structural deformation or damage caused by excessive force on one side. During the hoisting process, the lifting lugs will evenly distribute the weight, avoiding tilting or instability caused by uneven force.

[0046] In some embodiments, please refer to Figure 3 The side cover 200 includes a second steel structure component 210, a second anchoring component 220, and a second refractory castable body 230. The second steel structure component 210 includes a square frame 211 adapted to the tundish, a transverse connector 212, and a longitudinal connector 213. The square frame 211 serves as the basic structure of the second steel structure component 210 and can effectively withstand various loads on the side cover 200, especially high temperature and impact loads. The square frame 211 has high rigidity and can provide a robust support structure, enhancing the overall stability.

[0047] Both ends of the longitudinal connector 213 are connected to the square frame 211, and one end of the transverse connector 212 is connected to the longitudinal connector 213, while the other end of the transverse connector 212 is connected to either the longitudinal connector 213 or the square frame 211. The square frame 211, the transverse connector 212, and the longitudinal connector 213 can be arranged into a square grid as needed. Each grid acts as an independent, stable quadrilateral unit, which helps to distribute external loads and improve the rigidity and stability of the entire side cover 200. Each grid bears a portion of the pressure, effectively preventing deformation or failure of a single part due to excessive load.

[0048] The grid structure can evenly distribute the pressure on the structure, prevent local stress concentration, and reduce the risk of local deformation or structural failure.

[0049] The grid structure effectively disperses external impact and vibration forces. Each grid unit acts as an independent structure, with different units supporting each other, thereby enhancing the overall seismic resistance. Even if one part is subjected to strong impact or vibration, other parts can remain stable, preventing the entire structure from collapsing due to local damage or failure.

[0050] The second anchoring component 220 includes a second anchor 221. Multiple second anchors 221 are connected to the square frame 211, the transverse connector 212, and the longitudinal connector 213. The second anchors 221 can extend outward relative to each other, extending the effective range of the square frame 211, the transverse connector 212, and the longitudinal connector 213. The second refractory castable 230 is filled in the second steel structure component 210. The second anchors 221 are embedded in the second refractory castable 230. The refractory castable can not only improve the thermal insulation of the cover, but also, through the second anchors 221, make the thermal expansion and contraction stress of the side cover 200 in the high temperature environment evenly distributed, reducing the deformation or damage caused by thermal stress.

[0051] The longitudinal connector 213 is specifically a longitudinal steel plate, and the transverse connector 212 is specifically a transverse steel pipe.

[0052] As a further embodiment, the second anchor 221 is Y-shaped. The Y-shaped anchor increases the contact area between the second anchor 221 and the connecting component, which can effectively disperse the stress applied to the anchor. The Y-shaped structure provides multiple contact points, allowing the load to be evenly distributed, reducing stress concentration, and avoiding damage or loosening caused by excessive local stress.

[0053] In some embodiments, please refer to Figure 1 The second refractory casting body 230 has a steel flow hole 231 and a second baking hole 232. The steel flow hole 231 and the second baking hole 232 are located in the middle of the second refractory casting body 230. The steel flow hole 231 is used to guide and control the flow of molten steel, ensuring that the molten steel passes smoothly through the refractory casting body without obstruction. By opening the steel flow hole 231 in the middle of the liner, the path of molten steel flow can be optimized, avoiding problems such as uneven flow rate, local accumulation, or splashing caused by poor flow. The position of the steel flow hole 231 helps the molten steel to be evenly distributed when passing through the refractory casting body, thereby improving the fluidity of the molten steel in the tundish, ensuring that the molten steel temperature remains stable, and facilitating the smooth progress of subsequent processes.

[0054] The second baking hole 232 is used to promote the flow of air and heat during the preheating and baking process of the lining. The second baking hole 232, which is set in a reasonable position, can accelerate the baking process of the lining, help to heat and preheat the refractory casting evenly, improve the refractory and thermal stability of the lining, and avoid damage to the lining due to excessive thermal stress.

[0055] In the specific implementation process, refractory castable is filled into the structure composed of the second steel structure component 210 and the second anchoring component 220. The second baking hole 232 and the steel flow hole 231 are reserved in the mold. Then, the refractory castable is used to cast the frame structure to form a refractory castable containing the first baking hole 131 and the steel flow hole 231.

[0056] In some embodiments, please refer to Figure 3 The square frame 211 is equipped with multiple second lifting lugs 211a, which are symmetrically arranged and welded to the square frame 211. The symmetrical arrangement of the second lifting lugs 211a ensures even load distribution during hoisting, preventing the square frame 211 from tilting or becoming unbalanced due to asymmetrical lugs or excessive local stress. This symmetrical arrangement ensures the stability of the entire structure during hoisting, reducing damage or danger caused by imbalance.

[0057] Workflow: First, the first anchor 121 is welded to the first steel structure component 110, and the second anchor 221 is welded to the second steel structure component 210. Then, die-casting molds are inserted into the first and second steel structure components 110 and 210, and refractory castable is poured into them. Next, the refractory castable is cured or baked to form a refractory casting containing baking holes and steel flow holes 231. Finally, the formed middle cover 100 and side cover 200 are placed on the tundish using lifting equipment.

[0058] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the present utility model.

Claims

1. A T-shaped intermediate bag cover, used to cover an intermediate bag, characterized in that, include: The middle cover includes a first steel structure component, a first anchoring component, and a first refractory castable body. The first steel structure component includes a first connector and two second connectors and two third connectors symmetrically arranged relative to the middle of the first connector. The middle portions of the two second connectors are fixedly connected to both ends of the first connector, and the two second connectors are inclined relative to each other to form an open end and a contracted end. The two third connectors are disposed in the contracted end and are located in the same plane as the second connectors. The third connectors are fixedly connected to the first connectors and are arranged perpendicular to the first connectors. The end of the third connector away from the first connector is connected to the second connector. The first anchoring component includes a plurality of first anchors, which are connected to the first connector, the second connectors, and the third connectors. The first refractory castable body is filled in the first steel structure component. The two side covers are symmetrically arranged on both sides of the middle cover.

2. The T-shaped intermediate bag cover according to claim 1, characterized in that, The first steel structure component further includes a first connecting plate and a second connecting plate. The first connecting plate is connected to the ends of the two second connecting members and the ends of the two third connecting members, respectively. The second connecting plate is connected to the middle of the two second connecting members and the middle of the third connecting member, respectively.

3. A T-shaped intermediate bag cover according to claim 2, characterized in that, The first steel structure component also includes a T-shaped member, the first protruding end of which is connected to the second connector and the end away from the third connector, and the second protruding end of which is connected to the first connector.

4. A T-shaped intermediate bag cover according to any one of claims 1-3, characterized in that, The first, second, and third connecting parts are I-beams.

5. A T-shaped intermediate bag cover according to claim 4, characterized in that, The first refractory casting body has a first baking hole in the middle.

6. A T-shaped intermediate bag cover according to claim 5, characterized in that, The first steel structure component is provided with a plurality of first lifting lugs, which are symmetrically arranged and welded to the first steel structure component.

7. A T-shaped intermediate bag cover according to claim 1, characterized in that, The side cover includes a second steel structure component, a second anchoring component, and a second refractory castable. The second steel structure component includes a square frame adapted to the tundish, a transverse connector, and a longitudinal connector. Both ends of the longitudinal connector are connected to the square frame, one end of the transverse connector is connected to the longitudinal connector, and the other end of the transverse connector is connected to either the longitudinal connector or the square frame. The second anchoring component includes second anchors, and multiple second anchors are connected to the square frame, the transverse connector, and the longitudinal connector. The second refractory castable is filled in the second steel structure component.

8. A T-shaped intermediate bag cover according to claim 7, characterized in that, The second anchor is Y-shaped.

9. A T-shaped intermediate bag cover according to claim 7, characterized in that, The second refractory casting body is provided with a steel flow hole and a second baking hole, which are located in the middle of the second refractory casting body.

10. A T-shaped intermediate bag cap according to claim 7, characterized in that, The square frame is provided with a plurality of second lifting lugs, which are symmetrically arranged and welded to the square frame.

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