High-strength tundish cover

Abstract

The high-strength tundish cover comprises a main body, a plurality of fire-resistant sleeves and a plurality of connecting parts, a plurality of working holes are formed in the main body, a first side face and a second side face of the main body are arc-shaped, and the protruding direction of the first side face is consistent with the sinking direction of the second side face; each fireproof sleeve comprises a sleeve, an upper shielding part and a lower shielding part, each sleeve is arranged in the corresponding working hole, each upper shielding part is arranged at the top end of the corresponding sleeve and makes contact with the first side face, and each lower shielding part is arranged at the bottom end of the corresponding sleeve and makes contact with the second side face; the plurality of connecting parts are respectively connected with the main body, and the normal on the joint of the main body and each connecting part is parallel to the connecting part; wherein the connecting parts are attached to the tundish, and the second side faces face the tundish. The high-strength tundish cover has high strength, deformation and warping of the tundish cover can be reduced in the working process, and the service life of the tundish cover is prolonged.

Description

A high-strength intermediate bag lid Technical Field

[0001] This utility model relates to the field of tundish cover design and application technology in the steelmaking industry, and particularly to a high-strength tundish cover. Background Technology

[0002] The tundish is a refractory container used in short-process steelmaking. It first receives molten steel poured from the ladle, and then distributes it to the various crystallizers through the tundish nozzle. To enhance the tundish's insulation, it is typically equipped with a tundish cover, which serves to maintain heat, prevent molten steel and slag splashing, protect personnel and equipment safety, and improve the working environment. The working environment of the tundish cover is relatively harsh, frequently subjected to mechanical vibration and impact, and repeatedly subjected to drastic temperature changes of the molten steel.

[0003] Traditional tundish covers are made from a single piece of cast steel or cast iron, offering good integrity. However, they suffer from extremely uneven heating after high-temperature thermal radiation, easily generating significant thermal stress. Especially under rapid heating and cooling, the repeated phase transformations of the cast steel make it highly susceptible to severe deformation and warping. Secondly, the traditional flat tundish cover, placed on the tundish, experiences shear forces at the contact point, further exacerbating deformation and warping. Additionally, the tundish cover has pouring holes, temperature measuring holes, and baking holes. These openings, due to abrupt shape changes, cause stress concentration, leading to significant deformation and warping under uneven thermal stress.

[0004] When the tundish cover deforms or warps, the refractory layer on its working surface is prone to detachment. This detached refractory layer falls into the tundish and, during the pouring process, clogs the tundish's immersion nozzle. The refractory material that cannot float to the surface in time becomes foreign inclusions in the billet, causing the rolled steel to fail inspection. Deformation and warping of the tundish cover also directly affect its service life. Deformation leads to poor sealing at the contact points between the refractory layer and the metal structure or the tundish. The direct impact of the high-temperature flames and exhaust gases, coupled with the high-temperature radiation from the molten steel, causes the working surface temperature of the tundish cover to rise rapidly, resulting in severe high-temperature oxidation and erosion of the exposed metal frame. This leads to continuous burning and detachment of the metal structure, reducing the service life of the tundish cover. Summary of the Invention

[0005] The main objective of this invention is to provide a high-strength intermediate bag cover to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model proposes a high-strength intermediate bag cover, comprising:

[0007] The main body has several working holes, and its first side and second side are arc-shaped. The direction of the protrusion of the first side is consistent with the direction of the concavity of the second side, and the first side and the second side are arranged opposite to each other.

[0008] A plurality of fire-resistant sleeves, wherein each fire-resistant sleeve includes a sleeve, an upper shielding part and a lower shielding part, each sleeve is respectively disposed in each working hole, each upper shielding part is respectively disposed at the top of each sleeve and in contact with the first side, and each lower shielding part is respectively disposed at the bottom of each sleeve and in contact with the second side.

[0009] A plurality of connecting portions, each connecting portion being connected to the main body, wherein the normal at the connection point between the main body and each connecting portion is parallel to that connecting portion; wherein

[0010] The connecting parts are respectively attached to the intermediate package, with the second side facing the intermediate package.

[0011] In an alternative embodiment, a high-strength intermediate bag cover further includes a reinforcing rib assembly disposed within the body.

[0012] In an optional embodiment, the reinforcing rib assembly includes a plurality of transverse reinforcing ribs and a plurality of longitudinal reinforcing ribs, wherein the plurality of transverse reinforcing ribs and the plurality of longitudinal reinforcing ribs intersect each other.

[0013] In an alternative embodiment, the plurality of longitudinal reinforcing ribs are respectively disposed adjacent to the plurality of working holes.

[0014] In an alternative embodiment, a high-strength intermediate bag cover further includes a fire-resistant layer disposed on the second side surface to withstand the scorching of high-temperature flames and the scouring of high-temperature airflow.

[0015] In an optional embodiment, the plurality of working holes include two stopper rod holes and a baking hole, the two stopper rod holes and the baking hole penetrating the body from the first side to the second side.

[0016] In an optional embodiment, the plurality of refractory sleeves and the refractory layer are made of high-alumina refractory material.

[0017] In an alternative embodiment, a high-strength intermediate bag cover includes two connecting portions, which are respectively connected to opposite ends of the main body.

[0018] In an alternative embodiment, the width values ​​of the two connecting portions are equal to the width value of the main body.

[0019] In an alternative embodiment, a high-strength intermediate bag cover further includes two lugs, which are respectively connected to the two connecting portions.

[0020] Compared with the prior art, the present invention has the following technical effects:

[0021] The first and second sides of the main body are arc-shaped, and the direction of the convexity of the first side is consistent with the direction of the concavity of the second side. The overall structure of the main body is arch-shaped, which can offset part of the collapse tensile force of the main body material under high temperature. At the same time, the compressive resistance shown in the transition process from curve to straight line during the collapse deformation of the main body is opposite stress and opposite support to the collapse deformation of the main body material, so as to suppress the deformation of the main body and improve the strength of the intermediate bag cover.

[0022] A fire-resistant sleeve is installed on each working hole. On the one hand, it can prevent the main body from being damaged by collision. On the other hand, it can prevent high-temperature flames and high-temperature airflow from directly acting on the inner wall of the working hole and the junction of the working hole and the second side. This prevents the junction of the main body's working hole and the second side from being subjected to excessive thermal stress, resulting in large deformation and warping, and improves the strength of the intermediate bale cover.

[0023] Several connecting parts are connected to the main body. The normal line at the connection between the main body and each connecting part is parallel to the connecting part. The connecting parts are attached to the intermediate bag. Each section of the main body is only subjected to pressure and no shear force, which reduces the deformation of the main body and improves the strength of the intermediate bag cover. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 is a top view of a high-strength intermediate bag cover according to the present invention;

[0026] Figure 2 is a cross-sectional view along the VV direction in Figure 1;

[0027] Figure 3 is an enlarged view of part A in Figure 2.

[0028] Explanation of icon numbers:

[0029]

[0030]

[0031] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0034] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0035] Referring to Figures 1-3, this utility model proposes a high-strength intermediate bag cover 100.

[0036] In this embodiment of the utility model, the high-strength intermediate bag cover 100 includes a main body 1, several fire-resistant sleeves 2, and several connecting parts 3. The main body 1 has several working holes 101, and its first side 102 and second side 103 are arc-shaped. The direction of the protrusion of the first side 102 is consistent with the direction of the concavity of the second side 103. The first side 102 and the second side 103 are arranged opposite to each other. Several fire-resistant sleeves 2 include sleeves 201, upper shielding parts 202 and lower shielding parts 203. Each sleeve 201 is disposed in each working hole 101 and contacts the inner wall of the working hole 101. Each upper shielding part 202 is disposed at the top of each sleeve 201 and contacts the first side 102. Each lower shielding part 203 is disposed at the bottom of each sleeve 201 and contacts the second side 103. Several connecting parts 3 are connected to the main body 1. The normal line at the connection between the main body 1 and each connecting part 3 is parallel to the connecting part 3. The several connecting parts 3 are respectively attached to the intermediate package, and the second side 103 faces the intermediate package.

[0037] Specifically, the high-strength tundish cover 100 covers the tundish, primarily its main body 1. The main functions of the main body 1 are: to provide insulation during the baking and pouring of the tundish; and to provide safety protection during temperature measurement and sampling. The first side 102 of the main body 1 covering the tundish is the top surface, and its second side 103 is the bottom surface.

[0038] The first side 102 and the second side 103 of the main body 1 are arc-shaped, and the direction of the protrusion of the first side 102 is consistent with the direction of the concavity of the second side 103. The overall structure of the main body 1 is arch-shaped, which can offset part of the collapse tensile force of the material of the main body 1 under high temperature. At the same time, the compressive resistance exhibited during the transition from curve to straight line in the deformation process of the main body 1 is opposite to the stress and opposite to the deformation of the material of the main body 1, so as to suppress the deformation of the main body 1 and improve the strength of the main body 1. The arc-shaped design of the first side 102 and the second side 103 of the main body 1 can improve its stress release ability and delay the degree of deformation.

[0039] Several working holes 101 include two stopper rod holes 1011 and a baking hole 1012. All working holes 101 extend from the first side 102 of the main body 1 to the second side 103 of the main body 1. The first side 102 and the second side 103 have abrupt changes in shape at the working holes 101. During the steelmaking process, heat or impact can easily cause deformation or damage at this point, resulting in the falling off of the structural material of the main body 1. A refractory sleeve 2 is fitted onto each working hole 101. On the one hand, this can prevent the main body 1 from being damaged by impact. On the other hand, it can prevent high-temperature flames and high-temperature airflows from directly acting on the inner wall of the working hole 101 and the junction of the working hole 101 and the second side 103, preventing excessive thermal stress at the junction of the working hole 101 and the second side 103 of the main body 1, which can cause large deformation and warping. All refractory sleeves 2 are made of high-alumina refractory material.

[0040] All connecting parts 3 are flat and connected to the main body 1, specifically to the side of the main body 1. Each connecting part 3 fits against the intermediate bag, supporting the main body 1 and thus covering it. Specifically, at opposite ends of the main body 1, i.e., opposite ends of the arched main body 1, a connecting part 3 is connected to each other. The width of each connecting part 3 is equal to the width of the main body 1, and the two connecting parts 3 fit against the flat support surface of the intermediate bag. The normal line at the connection between the main body 1 and each connecting part 3 is parallel to the connecting part 3. Each section of the main body 1 is only subjected to pressure, not shear force, reducing the deformation of the main body 1 and increasing its strength.

[0041] In one embodiment of this utility model, the high-strength intermediate bag cover 100 further includes a reinforcing rib assembly 4. All reinforcing rib assemblies 4 are disposed within the main body 1. Each reinforcing rib assembly 4 includes several transverse reinforcing ribs 401 and several longitudinal reinforcing ribs 402. The transverse reinforcing ribs 401 and longitudinal reinforcing ribs 402 intersect each other, and the longitudinal reinforcing ribs 402 are respectively arranged adjacent to several working holes 101. The reinforcing rib assembly 4 can enhance the strength and rigidity of the main body 1, reducing deformation and warping of the main body 1. In this embodiment, the number of both transverse reinforcing ribs 401 and longitudinal reinforcing ribs 402 is 4, and the 4 longitudinal reinforcing ribs 402 are arranged adjacent to 3 working holes 101.

[0042] In one embodiment of this utility model, the high-strength tundish cover 100 further includes a refractory layer 5, which is disposed on the second side surface 103 to withstand the scorching of high-temperature flames and the scouring of high-temperature airflow. This prevents high-temperature flames and airflow from directly acting on the second side surface 103 of the working hole 101, and prevents the main body 1, especially the side of the main body 1 near the tundish, from experiencing excessive thermal stress and causing significant deformation and warping. The refractory layer 5 is made of high-alumina refractory material.

[0043] In one embodiment of the present invention, the high-strength intermediate bag cover 100 further includes two lifting lugs 6, which are respectively connected to two connecting parts 3 for hoisting, transporting or transferring the high-strength intermediate bag cover 100.

[0044] In this application, the first side 102 and the second side 103 of the main body 1 are arc-shaped, and the direction of the protrusion of the first side 102 is consistent with the direction of the concavity of the second side 103. The overall structure of the main body 1 is arch-shaped, which can offset part of the collapse tensile force of the material of the main body 1 under high temperature. At the same time, the compressive resistance exhibited in the process of curve to straight line transition during the collapse deformation of the main body 1 is opposite stress and opposite support to the collapse deformation of the material of the main body 1, so as to suppress the deformation of the main body 1 and improve the strength of the intermediate bag cover.

[0045] A fire-resistant sleeve 2 is fitted onto each working hole 101. On the one hand, this can prevent the main body 1 from being damaged by collision. On the other hand, it can prevent high-temperature flames and high-temperature airflow from directly acting on the inner wall of the working hole 101 and the junction of the working hole 101 and the second side 103. This prevents the junction of the working hole 101 and the second side 103 of the main body 1 from being subjected to excessive thermal stress, resulting in large deformation and warping, and improves the strength of the intermediate bale cover.

[0046] Several connecting parts 3 are respectively connected to the main body 1. The normal line at the connection between the main body 1 and each connecting part 3 is parallel to the connecting part 3. Several connecting parts 3 are respectively attached to the intermediate bag. Each section of the main body 1 is only subjected to pressure and no shear force, which reduces the deformation of the main body 1 and improves the strength of the intermediate bag cover.

[0047] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A high-strength intermediate bread bag lid, characterized in that, include: The main body has several working holes, and its first and second sides are arc-shaped. The direction of the protrusion of the first side is consistent with the direction of the concavity of the second side, and the first and second sides are arranged opposite to each other. Several fire-resistant sleeves are provided, each including a sleeve, an upper shield, and a lower shield. Each sleeve is disposed in each working hole. Each upper shield is disposed at the top of each sleeve and contacts the first side, and each lower shield is disposed at the bottom of each sleeve and contacts the second side. Several connecting parts are connected to the main body, and the normal at the connection point between the main body and each connecting part is parallel to the connecting part. The connecting parts are respectively attached to the intermediate bale, with the second side facing the intermediate bale.

2. The high-strength intermediate bread bag lid as described in claim 1, characterized in that, It also includes a reinforcing rib assembly disposed within the main body.

3. A high-strength intermediate bread bag lid as described in claim 2, characterized in that, The reinforcing rib assembly includes several transverse reinforcing ribs and several longitudinal reinforcing ribs, with the transverse reinforcing ribs and the longitudinal reinforcing ribs intersecting each other.

4. A high-strength intermediate bread bag lid as described in claim 3, characterized in that, The longitudinal reinforcing ribs are respectively arranged adjacent to the working holes.

5. A high-strength intermediate bread bag lid as described in claim 4, characterized in that, It also includes a fire-resistant layer, which is disposed on the second side surface to withstand the scorching of high-temperature flames and the scouring of high-temperature airflow.

6. A high-strength intermediate bread bag lid as described in claim 5, characterized in that, The plurality of working holes include two stopper rod holes and a baking hole, the two stopper rod holes and the baking hole penetrating the main body from the first side to the second side.

7. A high-strength intermediate bread bag lid as described in claim 6, characterized in that, The refractory sleeves and the refractory layers are made of high-alumina refractory materials.

8. A high-strength intermediate bread bag lid as described in any one of claims 1-7, characterized in that, The high-strength intermediate bag cover includes two connecting parts, which are respectively connected to opposite ends of the main body.

9. A high-strength intermediate bread bag lid as described in claim 8, characterized in that, The width values ​​of the two connecting parts are equal to the width value of the main body.

10. A high-strength intermediate bread bag lid as described in claim 9, characterized in that, It also includes two lugs, which are respectively connected to the two connecting parts.

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