A thermal insulation board assembly and a thermal insulation cap
Patent Information
- Application Number
- CN202522079331.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-26
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-09-26
AI Technical Summary
这些气体如果不能在钢水充型保温帽前及时排出去，容易导致钢锭中冒口线上下部位出现气孔和夹杂物，从而影响钢锭的致密性和机械性能，而现有的保温帽内，绝热板设置在保温帽的内壁，并与保温帽内壁紧密贴合，故产生的气体无法顺利排出
[0004]本实用新型的目的在于提供一种绝热板组件及保温帽，该绝热板组件能够及时有效的排出钢水充型时产生的气体，有效提高钢锭的致密性和机械性能；并且还能在增加绝热板的排气功能的基础上，保证绝热板的结构强度，避免绝热板在使用过程中出现开裂、破损的情况。
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Figure CN224779301U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of metallurgical steel ingot mold casting technology, and in particular to an insulation board assembly and a heat preservation cap. Background Technology
[0002] During the production of ingot casting, a certain amount of gases, such as hydrogen and nitrogen, dissolve in the molten steel. Simultaneously, as the molten steel fills to the bottom of the insulating cap, the covering agent or heating agent covering the molten steel remains at the bottom of the insulating plate due to the obstruction of the insulating plate, and undergoes a high-temperature chemical reaction with the molten steel to produce gas. If these gases cannot be discharged in time before the molten steel fills the insulating cap, they can easily lead to porosity and inclusions in the riser area of the ingot, thus affecting the density and mechanical properties of the ingot. However, in existing insulating caps, the insulating plate is placed on the inner wall of the cap and is tightly fitted to it, thus preventing the generated gases from escaping smoothly.
[0003] Therefore, how to promptly remove the gas generated during the filling of molten steel is an urgent problem to be solved. Utility Model Content
[0004] The purpose of this utility model is to provide an insulation board assembly and a heat preservation cap. The insulation board assembly can effectively and timely discharge the gas generated during the filling of molten steel, effectively improving the density and mechanical properties of the steel ingot. Furthermore, while increasing the exhaust function of the insulation board, it can also ensure the structural strength of the insulation board and prevent the insulation board from cracking or breaking during use.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] An insulation panel assembly, comprising:
[0007] An insulation board frame includes four insulation boards connected end to end in sequence. The outer wall of each insulation board is adapted to fit the inner wall of the insulation cap. Each insulation board has an exhaust structure on its outer wall. The exhaust structure includes a longitudinal exhaust groove extending along a first direction and a transverse exhaust groove intersecting and communicating with the longitudinal exhaust groove. The first direction is parallel to the extension direction of the axis of the insulation board frame. One end of the longitudinal exhaust groove extends to the top side of the insulation board and forms an exhaust port on the top side of the insulation board. The cross-section of the longitudinal exhaust groove and the cross-section of the transverse exhaust groove are both arc-shaped.
[0008] The aforementioned heat insulation board frame is applied inside the heat insulation cap of the steel ingot mold, fitting snugly against the inner wall of the heat insulation cap. When molten steel is poured into the steel ingot mold, the high temperature of the molten steel causes not only the covering agent or heating agent above to generate gas, but also water vapor and some gas within the heat insulation board itself due to its material and structural characteristics. The heat insulation board itself has porous structures, giving it a certain degree of permeability, allowing gas to diffuse from the "hot side" to the "cold side." In this embodiment, an exhaust structure is provided on the outer wall (cold side) of the heat insulation board. When the outer wall of the heat insulation board is fitted against the inner wall of the heat insulation cap, and even when the heat insulation board expands due to heat and fits tightly against the inner wall of the heat insulation cap, the longitudinal and transverse exhaust grooves cooperate with the inner wall of the heat insulation cap to form channels that allow gas to flow. Specifically, the gas can flow upward through the longitudinal exhaust channel and be discharged through the exhaust port above. The transverse exhaust channel intersects and connects with the longitudinal exhaust channel. The transverse exhaust channel can increase the flow channel for the gas to converge on the "cold surface", so that the gas can be discharged quickly, improve the timeliness of gas discharge, and discharge the gas as cleanly as possible.
[0009] Both the cross-sections of the longitudinal and transverse venting grooves are designed to be arc-shaped, meaning that both are arc-shaped grooves. The concave surfaces of the longitudinal and transverse venting grooves are smoothly transitioned curved surfaces, ensuring that there are no sharp concave edges on the concave surfaces. This prevents the insulation board from cracking when it expands due to high temperatures, reducing the risk of structural cracking. On the other hand, by setting transverse and longitudinal venting grooves on the outer wall of the insulation board, the insulation board can also release some stress when it expands due to high temperatures, reducing the amount of deformation and the risk of deformation and cracking. Therefore, setting transverse and longitudinal venting grooves can improve the air permeability of the insulation board while reducing the risk of deformation and cracking.
[0010] Therefore, the exhaust structure on the outer wall of the insulation board of the above-mentioned insulation board assembly can effectively and timely exhaust the gas generated during the filling of molten steel. This helps to expel the gas in front of the insulation cap during the filling of molten steel, which helps to avoid the formation of pores and inclusions in the ingot above and below the cap line, thereby improving the density and mechanical properties of the ingot. Furthermore, it can also ensure the structural strength of the insulation board, release stress, and reduce the risk of cracking of the insulation board while increasing the exhaust function of the insulation board.
[0011] Optionally, the intersection of the longitudinal exhaust groove and the transverse exhaust groove is smoothly transitioned.
[0012] Optionally, the other end of the longitudinal exhaust channel extends to the bottom side of the insulation plate;
[0013] The two ends of the transverse exhaust groove do not intersect with the edges of the circumferential side of the insulation board.
[0014] Optionally, the overall shape of the transverse exhaust groove is wavy, and the crest and trough of the transverse exhaust groove are smoothly transitioned; the longitudinal exhaust groove intersects with the crest or trough of the transverse exhaust groove.
[0015] Optionally, the overall shape of the transverse exhaust groove is straight.
[0016] Optionally, the longitudinal exhaust groove has a straight overall shape.
[0017] Optionally, the cross-sections of the longitudinal exhaust groove and the transverse exhaust groove are both arc-shaped, the radius of the circle containing the arc of the longitudinal exhaust groove is the same as the radius of the circle containing the arc of the transverse exhaust groove, and the depth dimension of the longitudinal exhaust groove is the same as the depth dimension of the transverse exhaust groove.
[0018] Optionally, the radius of the circle containing the arc of the longitudinal exhaust groove and the radius of the circle containing the arc of the transverse exhaust groove are 20% to 30% of the thickness of the insulation board; and / or,
[0019] The depth of the longitudinal exhaust groove and the depth of the transverse exhaust groove are 20% to 30% of the thickness of the insulation board.
[0020] Optionally, the concave surface of the longitudinal exhaust groove is a smooth surface, and the concave surface of the transverse exhaust groove is a smooth surface.
[0021] Based on the same design concept, this solution also provides a heat-insulating cap, including a cap body structure and any of the heat insulation board components provided by the above technical solutions. The cap body structure has a hollow structure, and the heat insulation board component is disposed in the hollow structure. The outer wall surface of the heat insulation board of the heat insulation board component is adapted and fitted to the inner wall surface of the cap body structure. Attached Figure Description
[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. Wherein:
[0023] Figure 1 A cross-sectional structural diagram of a thermal cap provided for an embodiment of this utility model;
[0024] Figure 2 A schematic diagram of the structure of an insulation panel assembly provided in an embodiment of this utility model;
[0025] Figure 3 A schematic diagram of an insulation board provided for an embodiment of this utility model;
[0026] Figure 4 A schematic diagram of an insulation board provided for an embodiment of this utility model;
[0027] Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure along the AA direction.
[0028] Icons: 1-Insulation board frame; 2-Insulation cap; 11-Insulation board; 111-Longitudinal exhaust channel; 112-Horizontal exhaust channel. Detailed Implementation
[0029] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation of the present invention and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present invention without departing from the scope or spirit of the invention. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present invention encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.
[0030] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected," "linked," and "set up" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.
[0031] refer to Figure 1 and Figure 2As shown, this utility model provides a heat insulation plate assembly. For ease of explanation, the working position of the steel ingot mold is used for illustration, with the inlet for injecting molten steel into the heat insulation cap at the top, and the extension direction of the axis of the heat insulation cap being vertical. Specifically, the heat insulation plate assembly of this embodiment includes: a heat insulation plate frame, which includes four heat insulation plates 11 connected end to end in sequence. Preferably, adjacent heat insulation plates 11 are spliced together, and the four heat insulation plates 11 are spliced end to end to form a frame. The surface of each heat insulation plate 11 facing the inner wall of the frame is used for contact with molten steel and is called the "hot surface". The surface of the heat insulation plate 11 facing away from the inner wall of the frame is called the outer wall surface. The outer wall surface of each heat insulation plate 11 is used to fit and conform to the inner wall surface of the heat insulation cap 2 and is called the "cold surface". The outer wall of 1 is provided with an exhaust structure, which includes a longitudinal exhaust groove 111 extending along a first direction and a transverse exhaust groove 112 intersecting and communicating with the longitudinal exhaust groove 111. The first direction is parallel to the extension direction of the axis of the insulation board frame. One end of the longitudinal exhaust groove 111 extends to the top side of the insulation board 11 and forms an exhaust port on the top side of the insulation board 11. The cross-section of the longitudinal exhaust groove 111 and the cross-section of the transverse exhaust groove 112 are both arc-shaped, and the cross-section of the longitudinal exhaust groove 111 and the transverse exhaust groove 112 are both arc-shaped grooves.
[0032] The aforementioned heat insulation board frame is applied inside the heat insulation cap of the steel ingot mold, fitting snugly against the inner wall of the heat insulation cap. When molten steel is injected into the steel ingot mold, the high temperature of the molten steel will not only cause the covering agent or heating agent covering it to generate gas, but also cause water vapor to be generated inside the heat insulation board due to the material and structural characteristics of the heat insulation board itself. The heat insulation board itself has pores, which gives it a certain degree of air permeability, allowing gas to diffuse from the "hot side" to the "cold side". In this embodiment, an exhaust structure is provided on the outer wall (cold side) of the heat insulation board. When the outer wall of the heat insulation board 11 is attached to the inner wall of the heat insulation cap 2, the longitudinal exhaust groove 111 and the transverse exhaust groove 112 cooperate with the heat insulation cap 2 to form a channel that allows gas to flow. Specifically, the gas can flow upward through the longitudinal exhaust groove 111 and be discharged through the exhaust port at the top. The transverse exhaust groove 112 intersects and connects with the longitudinal exhaust groove 111. The transverse exhaust groove 112 can increase the flow channel for the gas to converge on the "cold surface", so that the gas can be discharged quickly, improve the timeliness of gas discharge, and discharge the gas as cleanly as possible.
[0033] Combination Figure 2 ,like Figure 5As shown, the cross-sections of the longitudinal venting groove 111 and the transverse venting groove 112 are both arc-shaped, meaning that both the longitudinal venting groove 111 and the transverse venting groove 112 are arc-shaped grooves. The concave surfaces of the longitudinal and transverse venting grooves are smoothly transitioned curved surfaces, ensuring that the concave surfaces of the longitudinal venting groove 111 and the transverse venting groove 112 do not have sharp concave edges. This prevents the insulation board from cracking when it expands due to high temperatures, reducing the risk of structural cracking of the insulation board. On the other hand, by setting transverse and longitudinal venting grooves on the outer wall of the insulation board, when the insulation board expands due to high temperatures, the transverse and longitudinal venting grooves can also release certain stress, reducing the amount of deformation of the insulation board and lowering the risk of deformation and cracking. Therefore, setting transverse and longitudinal venting grooves can improve the air venting performance of the insulation board while reducing the risk of deformation and cracking.
[0034] Therefore, the exhaust structure on the outer wall of the insulation board of the above-mentioned insulation board assembly can effectively and promptly exhaust the gas generated during the filling of molten steel. This facilitates the timely discharge of gas in front of the insulation cap during the filling of molten steel, which helps to avoid the formation of pores and inclusions in the ingot above and below the cap line. This can improve the density and mechanical properties of the ingot, effectively increasing the yield of the ingot by 1% to 3%. Furthermore, while increasing the exhaust function of the insulation board, it can also ensure the structural strength of the insulation board, release stress, and reduce the risk of cracking of the insulation board.
[0035] As a preferred implementation method, refer to Figure 3 As shown, the intersection of the longitudinal venting groove 111 and the transverse venting groove 112 is smoothly transitioned, eliminating the sharp edges at the intersection of the longitudinal venting groove 111 and the transverse venting groove 112. This helps to enhance the structural strength at the intersection of the longitudinal venting groove 111 and the transverse venting groove 112 of the insulation board, and reduces the risk of cracking of the insulation board after it expands due to heat.
[0036] Combination Figure 2 ,like Figure 3 and Figure 4 As shown, the lengths of the longitudinal exhaust groove 111 and the transverse exhaust groove 112 are set such that one end of the longitudinal exhaust groove 111 extends to the bottom side of the insulation board; the two ends of the transverse exhaust groove 112 do not intersect with the edges of the circumferential sides of the insulation board, that is, the two ends of the transverse exhaust groove 112 do not extend to the edges of the insulation board. Preferably, the extension directions of the longitudinal exhaust groove 111 and the transverse exhaust groove 112 are arranged in a crisscross pattern, with the extension directions of the longitudinal exhaust groove 111 and the transverse exhaust groove 112 being perpendicular to each other. The longitudinal exhaust groove 111 extends vertically, and the transverse exhaust groove 112 extends horizontally.
[0037] Continue to refer to Figure 3 and Figure 4As shown, at least two longitudinal exhaust channels 111 can be provided on the same insulation board 11, with at least two longitudinal exhaust channels 111 arranged in parallel with intervals. For example, two, three, or four longitudinal exhaust channels 111 can be provided; at least one transverse exhaust channel 112 can be provided. For example, one, two, or three transverse exhaust channels 112 can be provided. When two or more transverse exhaust channels 112 are provided, they are arranged at intervals along the vertical direction. The number of longitudinal exhaust channels 111 and transverse exhaust channels 112 can be set according to the size of the "cold side" of the insulation board. Without affecting the required structural strength of the insulation board, as many longitudinal exhaust channels 111 and transverse exhaust channels 112 as possible can be provided to improve the exhaust efficiency of the insulation board.
[0038] In order to ensure that the gas can be discharged in a timely manner, such as Figure 3 As shown in Figure 4, the overall shape of the longitudinal exhaust groove 111 is straight. When gas diffuses into or flows into the longitudinal exhaust groove 111, the straight shape of the exhaust groove minimizes the upward travel distance of the gas, allowing the gas to be discharged more quickly. Furthermore, the straight shape of the longitudinal exhaust groove 111 facilitates processing and manufacturing.
[0039] Regarding the overall shape of the transverse exhaust channel extending in the direction of extension, as a configuration method, such as Figure 3 and Figure 4 As shown, the transverse exhaust groove 112 has a wavy overall shape, with smooth transitions between its crests and troughs. The longitudinal exhaust groove 111 intersects with the crests or troughs of the transverse exhaust groove 112. The wavy shape of the transverse exhaust groove 112 increases its area on the outer wall of the insulation board, increasing the gas flow channel area and facilitating the collection and discharge of more gas. For example, three parallel and spaced longitudinal exhaust grooves 111 can be provided on the outer wall of the insulation board. The longitudinal exhaust grooves 111 are generally straight, while the transverse exhaust grooves 112 extend horizontally, with the portion of the transverse exhaust groove 112 between two adjacent longitudinal exhaust grooves 111 forming a "V" shape or an inverted "V" shape.
[0040] As another way to set the overall shape of the horizontal exhaust channel, the overall shape of the horizontal exhaust channel can also be set to be straight, which is convenient for processing and manufacturing.
[0041] In one specific implementation, combined with Figure 4 ,like Figure 5As shown, the cross-sections of both the longitudinal exhaust groove 111 and the transverse exhaust groove 112 are arc-shaped. The radius of the arc in the longitudinal exhaust groove 111 is the same as the radius of the arc in the transverse exhaust groove 112, and the depth of the longitudinal exhaust groove 111 is the same as the depth of the transverse exhaust groove 112. The concave structures of the longitudinal exhaust groove 111 and the transverse exhaust groove 112 have the same shape and size, which facilitates processing.
[0042] Specifically, in combination Figure 4 ,like Figure 5 As shown, the radius of the arc of the longitudinal exhaust groove 111 and the radius of the arc of the transverse exhaust groove 112 are 20% to 30% of the thickness of the insulation board; the depth of the longitudinal exhaust groove 111 and the depth of the transverse exhaust groove 112 are 20% to 30% of the thickness of the insulation board. The concave structural dimensions of the longitudinal exhaust groove 111 and the transverse exhaust groove 112 are set according to the thickness of the insulation board, ensuring both exhaust performance and structural strength of the insulation board. For example, combined with... Figure 4 ,like Figure 5 As shown, taking the cross-section of the longitudinal exhaust groove as an example, the radius R of the circle containing the arc of the longitudinal exhaust groove 111 can be set to 25% of the thickness of the insulation board, and the depth t of the longitudinal exhaust groove 111 is 25% of the thickness of the insulation board minus 1 mm to 2 mm.
[0043] To ensure smooth gas discharge, the concave surface of the longitudinal exhaust groove 111 and the concave surface of the transverse exhaust groove 112 are both smooth, ensuring unobstructed gas passages and facilitating rapid and smooth gas discharge.
[0044] In the aforementioned insulation panel assembly, the insulation board can be a fiber-reinforced insulation board or an expanded perlite insulation board. Fiber-reinforced insulation boards comprise refractory fibers and refractory powder; they are low-cost, have excellent insulation performance, and are widely used. Expanded perlite insulation boards are porous, lightweight, and possess excellent thermal insulation properties, making them suitable for use in the casting of high-end steel grades.
[0045] Based on the same design concept, such as Figure 1 As shown, this embodiment also provides a heat-insulating cap, which is applied to a steel ingot mold and is located on the top side of the steel ingot mold. Specifically, the heat-insulating cap 2 includes a cap body structure and any of the heat insulation board components provided in the above embodiments. The cap body structure has a hollow structure, and the heat insulation board component is located inside the hollow structure. The outer wall surface of the heat insulation board 11 of the heat insulation board component is adapted to fit the inner wall surface of the cap body structure.
[0046] In the aforementioned heat insulation cap, the outer wall of the heat insulation plate of the heat insulation plate assembly is provided with an exhaust structure, which can effectively and timely exhaust the gas generated during the filling of molten steel, effectively improving the density and mechanical properties of the steel ingot; and can also ensure the structural strength of the heat insulation plate while increasing the exhaust function of the heat insulation plate, avoiding cracking and damage of the heat insulation plate during use.
[0047] Specifically, the cap structure has four sidewalls, and its cross-section is rectangular or square, perpendicular to its axis. Four insulating plates are sequentially assembled into a frame, placed within the hollow structure of the insulated cap. Each insulating plate is tightly fitted to the inner surface of the sidewall to prevent molten steel leakage during casting. Preferably, the sidewalls have a wedge-shaped structure, with the thickness gradually increasing from top to bottom, being thinner at the top and thicker at the bottom. The inner surface of the sidewall is sloped, making the hollow cavity of the cap structure frustum-shaped. The diameter of the upper base of the frustum-shaped hollow cavity is larger than the diameter of the lower base. The opening area at both ends of the hollow cavity is larger at the top and smaller at the bottom, which is beneficial for molten steel casting.
[0048] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. An insulation panel assembly, characterized in that, include: An insulation board frame includes four insulation boards connected end to end in sequence. The outer wall of each insulation board is adapted to fit the inner wall of the insulation cap. Each insulation board has an exhaust structure on its outer wall. The exhaust structure includes a longitudinal exhaust groove extending along a first direction and a transverse exhaust groove intersecting and communicating with the longitudinal exhaust groove. The first direction is parallel to the extension direction of the axis of the insulation board frame. One end of the longitudinal exhaust groove extends to the top side of the insulation board and forms an exhaust port on the top side of the insulation board. The cross-section of the longitudinal exhaust groove and the cross-section of the transverse exhaust groove are both arc-shaped.
2. The insulation panel assembly according to claim 1, characterized in that, The intersection of the longitudinal exhaust groove and the transverse exhaust groove is smoothly transitioned.
3. The insulation panel assembly according to claim 1, characterized in that, The other end of the longitudinal exhaust channel extends to the bottom side of the insulation plate; The two ends of the transverse exhaust groove do not intersect with the edges of the circumferential side of the insulation board.
4. The insulation panel assembly according to claim 1, characterized in that, The overall shape of the transverse exhaust groove is wavy, and the crests and troughs of the transverse exhaust groove are smoothly transitioned; the longitudinal exhaust groove intersects with the crests or troughs of the transverse exhaust groove.
5. The insulation panel assembly according to claim 1, characterized in that, The overall shape of the transverse exhaust channel is straight.
6. The insulation panel assembly according to any one of claims 1-5, characterized in that, The longitudinal exhaust groove has a straight overall shape.
7. The insulation panel assembly according to claim 1, characterized in that, The cross-sections of the longitudinal exhaust groove and the transverse exhaust groove are both arc-shaped. The radius of the circle containing the arc of the longitudinal exhaust groove is the same as the radius of the circle containing the arc of the transverse exhaust groove. The depth dimension of the longitudinal exhaust groove is the same as the depth dimension of the transverse exhaust groove.
8. The insulation panel assembly according to claim 7, characterized in that, The radius of the circle containing the arc of the longitudinal exhaust groove and the radius of the circle containing the arc of the transverse exhaust groove are 20% to 30% of the thickness of the insulation board; and / or, The depth of the longitudinal exhaust groove and the depth of the transverse exhaust groove are 20% to 30% of the thickness of the insulation board.
9. The insulation panel assembly according to claim 1, characterized in that, The concave surface of the longitudinal exhaust groove is a smooth surface, and the concave surface of the transverse exhaust groove is a smooth surface.
10. A thermal cap, characterized in that, The device includes a cap structure and an insulation panel assembly as described in any one of claims 1-9, wherein the cap structure has a hollow structure, the insulation panel assembly is disposed within the hollow structure, and the outer wall surface of the insulation panel of the insulation panel assembly is adapted and fitted to the inner wall surface of the cap structure.