A long water inlet with heat insulation properties
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- VESUVIUS ADVANCED CERAMICS (CHINA) CO LTD
- Filing Date
- 2025-04-29
- Publication Date
- 2026-06-30
AI Technical Summary
During the casting process, conventional long nozzle liners suffer from reduced thermal insulation performance due to hot and cold cycles and erosion by molten steel, increasing the risk of thermal shock cracking and chipping, reducing service life and increasing replacement frequency.
The design employs a sandwich structure, placing the heat-insulating liner between the first and second body layers. It utilizes a loose, porous material or carbon-free hollow alumina spheres as the heat-insulating liner, which is protected by the first body layer to prevent direct contact with molten steel.
It effectively prevents the wear and tear of the heat insulation lining, extends the service life of the long nozzle, reduces the risk of thermal shock cracking and chipping, and reduces the frequency of replacement.
Smart Images
Figure CN224424262U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of long water inlet technology, and in particular to a long water inlet with heat insulation properties. Background Technology
[0002] The long nozzle is a crucial functional component in continuous casting, used between the ladle and tundish to guide the flow of molten steel and prevent secondary oxidation and splashing. During the process of transporting molten steel from the ladle to the tundish through the long nozzle, its inner surface is subjected to scouring and erosion by the molten steel. Simultaneously, due to the high temperature of the molten steel, a temperature difference forms between the inner and outer surfaces of the long nozzle as it passes through, resulting in thermal shock. Therefore, a heat-insulating lining is typically installed inside a conventional long nozzle to protect it from the thermal shock of the hot molten steel, thus mitigating the problem of cracking and spalling caused by thermal shock.
[0003] In the middle and later stages of casting, the lining of conventional long nozzles suffers severe wear and tear due to repeated hot and cold cycles, scouring and erosion by molten steel. This significantly reduces the heat insulation effect of the lining, increases the risk of the long nozzle cracking and falling off due to thermal shock, reduces the service life of the long nozzle, and thus increases the risk of billet downgrading due to the need to replace the long nozzle.
[0004] Therefore, there is an urgent need to provide a long water inlet with heat insulation properties to solve the above problems. Utility Model Content
[0005] The purpose of this invention is to provide a long gate with heat insulation properties, which can avoid the risk of thermal shock cracking and chipping of the long gate, and at the same time prevent the heat insulation lining from being lost during the casting process.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] A long sprue with heat insulation properties includes a first body layer, a second body layer, and a heat insulation liner layer. The first body layer is located inside the second body layer, and the heat insulation liner layer is sandwiched between the first body layer and the second body layer.
[0008] As an optional solution, the thickness of the thermal insulation lining is 3-10 mm.
[0009] As an optional solution, the thickness of the thermal insulation liner is 5-8 mm.
[0010] As an alternative, the insulating liner is made of a loose, porous insulating material.
[0011] As an alternative, the thermal insulation liner is made of carbon-free hollow spherical alumina.
[0012] As an alternative, the thickness of the first body layer and the second body layer are equal.
[0013] As an alternative, the thickness of the first body layer is greater than the thickness of the second body layer.
[0014] As an alternative, the thickness of the first body layer is less than the thickness of the second body layer.
[0015] As an optional solution, the thickness of the first body layer is 5-10 mm.
[0016] As an optional solution, the thickness of the second body layer is 5-10 mm.
[0017] The beneficial effects of this utility model are:
[0018] This invention provides a long nozzle with heat insulation properties. The heat insulation lining is transferred between the first body layer and the second body layer, designed as a sandwich design. This design has two advantages: firstly, the heat insulation lining can still provide heat insulation and avoid the risk of thermal shock cracking and chipping of the long nozzle; secondly, the protection of the first body layer can prevent molten steel from directly contacting the heat insulation lining, thereby avoiding damage to the heat insulation lining due to hot and cold cycles, scouring by molten steel, and erosion by molten steel. This can greatly extend the service life of the long nozzle and reduce the risk of billet downgrading due to the replacement of the long nozzle. Attached Figure Description
[0019] Figure 1 This is a cross-sectional view of the long water inlet provided in this embodiment of the utility model;
[0020] Figure 2 This is a longitudinal sectional view of the long water inlet provided in this embodiment of the utility model.
[0021] In the picture:
[0022] 10. First body layer; 20. Second body layer; 30. Thermal insulation lining layer; 40. Inner cavity. Detailed Implementation
[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0024] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0026] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0027] The long nozzle is a crucial functional component in continuous casting, used between the ladle and tundish to guide the flow of molten steel and prevent secondary oxidation and splashing. During the process of transporting molten steel from the ladle to the tundish through the long nozzle, its inner surface is subjected to scouring and erosion by the molten steel. Simultaneously, due to the high temperature of the molten steel, a temperature difference forms between the inner and outer surfaces of the long nozzle as it passes through, resulting in thermal shock. Therefore, a heat-insulating lining is typically installed inside a conventional long nozzle to protect it from the thermal shock of the hot molten steel, thus mitigating the problem of cracking and spalling caused by thermal shock.
[0028] In the middle and later stages of casting, the lining of conventional long nozzles suffers severe wear and tear due to repeated hot and cold cycles, scouring and erosion by molten steel. This significantly reduces the heat insulation effect of the lining, increases the risk of the long nozzle cracking and falling off due to thermal shock, reduces the service life of the long nozzle, and thus increases the risk of billet downgrading due to the need to replace the long nozzle.
[0029] To address the aforementioned issues, this embodiment provides a long gate with thermal insulation properties, which can avoid the risk of thermal shock cracking and chipping of the long gate, while also preventing the loss of the thermal insulation lining 30 during the casting process.
[0030] Specifically, such as Figure 1 and Figure 2 As shown, the long nozzle includes a first body layer 10, a second body layer 20, and a heat-insulating inner lining layer 30. The first body layer 10 is located inside the second body layer 20, and the heat-insulating inner lining layer 30 is sandwiched between the first body layer 10 and the second body layer 20. An inner cavity 40 is formed in the middle of the long nozzle, and the inner cavity 40 is used to supply molten steel to pass through.
[0031] The long nozzle provided in this embodiment transfers the heat-insulating liner 30 between the first body layer 10 and the second body layer 20, designing it as a sandwich design. This design has two advantages: firstly, the heat-insulating liner 30 can still play a role in heat insulation and avoid the risk of thermal shock cracking and chipping of the long nozzle; secondly, the protection of the first body layer 10 can prevent molten steel from directly contacting the heat-insulating liner 30, thereby avoiding the wear and tear of the heat-insulating liner 30 due to hot and cold cycles, scouring and erosion by molten steel, which can greatly extend the service life of the long nozzle and reduce the downgrading of billets caused by replacing the long nozzle.
[0032] In one optional embodiment, the thickness of the thermal insulation liner 30 is 3-10 mm. Specifically, the thickness of the thermal insulation liner 30 can be 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm. By setting the thickness of the thermal insulation liner 30 within the above range, the thermal insulation effect can be ensured, and the risk of thermal shock cracking and sheet detachment at long nozzles can be avoided.
[0033] Preferably, the thickness of the thermal insulation liner 30 is 5-8 mm. Specifically, the thickness of the thermal insulation liner 30 can preferably be 5 mm, 6 mm, 7 mm, or 8 mm. By setting the thickness of the thermal insulation liner 30 within the above range, material costs can be saved while ensuring good thermal insulation performance.
[0034] Furthermore, the thermal insulation lining layer 30 is made of a loose and porous thermal insulation material. Generally speaking, the common characteristics of such thermal insulation materials are that they are lightweight, loose, porous or fibrous, which can play a good role in thermal insulation and avoid the risk of thermal shock cracking and shedding of long nozzles.
[0035] In one optional embodiment, the thermal insulation liner 30 is made of carbon-free hollow spherical alumina. This material ensures thermal insulation performance, providing excellent heat insulation and preventing the risk of thermal shock cracking and detachment of the long nozzle.
[0036] In other alternative embodiments, the heat insulation lining 30 can also be made of quartz as the main material, which can also ensure the heat insulation effect and play a good role in heat insulation and heat preservation. It can be flexibly set according to actual needs, and no specific limitation is made here.
[0037] It should be noted that the first body layer 10 and the second body layer 20 are made of the same material and both belong to existing technology, so they will not be described in detail here.
[0038] In one optional embodiment, the thicknesses of the first body layer 10 and the second body layer 20 can be equal. In another optional embodiment, the thickness of the first body layer 10 can be greater than the thickness of the second body layer 20. In yet another optional embodiment, the thickness of the first body layer 10 can be less than the thickness of the second body layer 20. In other words, the thickness relationship between the first body layer 10 and the second body layer 20 can be adaptively set according to actual needs, and no specific limitations are imposed here.
[0039] Furthermore, the thickness of the first body layer 10 is 5-10 mm. Specifically, the thickness of the first body layer 10 can be 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm. By setting the thickness of the first body layer 10 within the above range, it can provide better protection for the heat insulation lining layer 30, thereby preventing the heat insulation lining layer 30 from being damaged by hot and cold cycles, scouring by molten steel, and erosion by molten steel. This can greatly extend the service life of the long nozzle, thereby reducing the downgrading of billets due to the replacement of the long nozzle.
[0040] Furthermore, the thickness of the second body layer 20 is 5-10 mm. Specifically, the thickness of the second body layer 20 can be 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm. By setting the thickness of the second body layer 20 within the above range, the overall structural strength of the long nozzle can be ensured.
[0041] It should be noted that the accompanying drawings in this utility model are only for illustrating the relationship between the layers and do not represent the actual thickness of each layer. The thickness of each layer is designed based on the experience of those skilled in the art and actual needs. Only a portion of the structure is shown; only a partial structure is depicted to demonstrate the multi-layer structure. Clearly, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model and are not intended to limit the implementation of the present utility model. For those skilled in the art, various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A long sprue with heat insulation properties, characterized in that, It includes a first body layer (10), a second body layer (20), and a heat-insulating inner lining layer (30). The first body layer (10) is located inside the second body layer (20). The heat-insulating inner lining layer (30) is sandwiched between the first body layer (10) and the second body layer (20). The heat-insulating inner lining layer (30) is used for heat insulation and to prevent the long nozzle from cracking and falling off due to thermal shock. The first body layer (10) is used to prevent molten steel from directly contacting the heat-insulating inner lining layer (30).
2. The long water inlet with heat insulation properties according to claim 1, characterized in that, The thickness of the heat insulation lining (30) is 3-10 mm.
3. The long water inlet with heat insulation properties according to claim 2, characterized in that, The thickness of the heat insulation lining layer (30) is 5-8 mm.
4. The long water inlet with heat insulation properties according to claim 1, characterized in that, The heat insulation lining (30) is made of a loose and porous heat insulation material.
5. The long water inlet with heat insulation properties according to claim 4, characterized in that, The heat insulation lining (30) is made of carbon-free hollow spherical alumina.
6. The long water inlet with heat insulation properties according to claim 1, characterized in that, The first body layer (10) and the second body layer (20) have the same thickness.
7. The long water inlet with heat insulation properties according to claim 1, characterized in that, The thickness of the first body layer (10) is greater than the thickness of the second body layer (20).
8. The long water inlet with heat insulation properties according to claim 1, characterized in that, The thickness of the first body layer (10) is less than the thickness of the second body layer (20).
9. The long water inlet with heat insulation properties according to any one of claims 6-8, characterized in that, The thickness of the first body layer (10) is 5-10 mm.
10. The long water inlet with heat insulation properties according to any one of claims 6-8, characterized in that, The thickness of the second body layer (20) is 5-10 mm.