A spray cooling mechanism for a bloom continuous casting machine

Abstract

The utility model relates to metal continuous casting technical field, concretely relates to a kind of spray cooling mechanism for bloom continuous casting machine, comprising: spray strip, several flat nozzles are arranged on the spray strip;The flat nozzle is configured as fan-shaped water curtain with fan-shaped cross section, the fan-shaped water curtain is sprayed to bloom to form the first coverage with length-width ratio greater than preset threshold;The installation orientation of the flat nozzle is configured, so that the length direction of the first coverage is consistent with the length direction of the bloom, the width direction of the first coverage is consistent with the width or thickness direction of the bloom.The flat nozzle is arranged along the length direction of the spray strip, and the adjacent two first coverages formed on the same cooling surface of the bloom are mutually overlapped.The spray cooling mechanism for bloom continuous casting machine is provided to solve the problem that the equipment procurement and maintenance cost are high in the prior art, and cooling blind area is prone to occur.

Description

Technical Field

[0001] This utility model relates to the field of continuous metal casting technology, and in particular to a spray cooling mechanism for a billet continuous casting machine. Background Technology

[0002] In the field of continuous metal casting technology, especially in the continuous casting process of billets, secondary cooling (i.e., spray cooling) is a core step that determines the quality of the cast billet. Its function is to continue to force-cool the cast billet by spraying cooling water on the basis of the initial shell formed in the crystallizer, so that it solidifies uniformly and completely.

[0003] Currently, the spray cooling mechanism commonly used in billet continuous casting machines primarily consists of conical nozzles as its core component (see reference). Figure 7 Traditional nozzles spray a conical water curtain with a tapered cross-section, forming a near-circular secondary coverage surface on the billet. However, this method has several drawbacks: First, to cover the entire width of the billet, a large number of nozzles need to be densely arranged along the casting direction, resulting in complex spray piping and a large number of nozzles. This not only increases the initial costs of equipment procurement, installation, and maintenance but also leads to high subsequent maintenance workload. Second, the circular coverage surface has low efficiency along the length of the billet, easily causing uneven cooling or cooling blind spots between the coverage areas of adjacent nozzles, affecting the final quality of the cast billet.

[0004] Therefore, how to provide a spray cooling mechanism that can ensure uniform cooling while reducing costs and improving cooling efficiency is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a spray cooling mechanism for a billet continuous casting machine to solve the problems of high equipment procurement and maintenance costs and the easy occurrence of cooling blind spots in the prior art.

[0006] The technical solution of this utility model is: a spray cooling mechanism for a billet continuous casting machine, comprising: a spray bar, wherein a plurality of flat nozzles are arranged on the spray bar; The flat nozzle is configured to spray a fan-shaped water curtain with a fan-shaped cross section. The fan-shaped water curtain sprays onto the billet to form a first coverage surface with an aspect ratio greater than a preset threshold. The flat nozzle is configured such that the length direction of the first covering surface is consistent with the length direction of the billet, and the width direction of the first covering surface is consistent with the width or thickness direction of the billet.

[0007] Preferably, the flat nozzles are arranged at intervals along the length of the spray bar, and the spacing of the flat nozzles is configured such that two adjacent first covering surfaces formed on the same cooling surface of the billet overlap each other.

[0008] Preferably, the spray bar is provided with a plurality of spray pipes, and the flat nozzle is detachably mounted on the spray pipes.

[0009] Preferably, the flat nozzle is adjustablely connected to the spray pipe via a swivel connector.

[0010] Preferably, the swivel connector is configured to allow adjustment and fixation of the mounting angle of the flat nozzle on the spray pipe.

[0011] Preferably, the spray strips are provided in four sets, each corresponding to one of the four cooling surfaces of the billet.

[0012] Preferably, the billet has two opposing arc-shaped cooling surfaces, and the flat nozzles mounted on the spray strips corresponding to the arc-shaped cooling surfaces are configured with the spray direction facing the arc-shaped cooling surfaces at an angle.

[0013] Preferably, the installation of the flat nozzles on the spray strips corresponding to the other two cooling surfaces of the billet is configured to adapt to the curvature of the billet's travel trajectory.

[0014] Preferably, the outlet of the flat nozzle is a flat slit, and the length direction of the flat slit corresponds to the length direction of the first covering surface.

[0015] Compared with the prior art, the advantages of this utility model are: (1) Flat nozzles are arranged on the spray bar. The flat nozzles spray the billet surface to form a long strip first covering surface with a large length-to-width ratio. The length direction of the covering surface is consistent with the billet pulling direction, which can cover the long area of ​​the billet more efficiently. By reasonably setting the nozzle spacing, the adjacent covering surfaces overlap each other, effectively eliminating the cooling blind area that may exist between the traditional circular covering surfaces, realizing comprehensive and uniform cooling, and improving the quality of the billet.

[0016] (2) Since the length of a single flat nozzle covers a much larger area than that of a traditional nozzle, the number of flat nozzles required to achieve the same cooling effect is greatly reduced compared to traditional nozzles. This simplifies the spray pipeline, reduces the procurement cost, installation cost, and subsequent maintenance and replacement cost of the entire cooling system, and is more economical.

[0017] (3) The flat nozzle is adjustable in angle through a flexible connector. Operators can flexibly adjust the spray angle according to the actual working conditions such as steel grade and billet pulling speed to ensure that the cooling water always covers the billet surface in the best condition. It has working condition adaptability and configuration flexibility. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the flat nozzle of this utility model installed on the spray bar; Figure 2 This utility model Figure 1 Enlarged view of region A in the middle; Figure 3 This is a schematic diagram of the shape of the water curtain ejected by the flat nozzle described in this utility model; Figure 4 This is a schematic diagram of the square billet structure described in this utility model; Figure 5 This is a schematic diagram showing the flat nozzles of this utility model spraying and covering the upper and lower sides of the square billet; Figure 6 This is a schematic diagram showing the flat nozzles of this utility model spraying and covering the left and right sides of the billet; Figure 7 This is a schematic diagram of the shape of the water curtain ejected by the conventional nozzle described in this utility model; Figure 8 This is a schematic diagram of the coverage surface of the conventional nozzle described in this utility model on the billet; Figure 9 This is a schematic diagram of the flat nozzle of this utility model covering the square billet; Among them: 1. Spray strip; 2. Spray pipe; 3. Flat nozzle; 31. Fan-shaped water curtain; 32. First covering surface; 4. Square billet; 5. Traditional nozzle; 51. Conical water curtain; 52. Second covering surface. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to specific embodiments: like Figures 1 to 6 As shown, a spray cooling mechanism for a billet continuous casting machine includes a spray bar 1, a plurality of spray pipes 2 are provided on the spray bar 1, and flat nozzles 3 are detachably installed on the spray pipes 2, thereby arranging the flat nozzles 3 on the spray bar 1.

[0020] The flat nozzle 3 is adjustablely connected to the spray pipe 2 via a union-type connector (such as a ball joint or hinged joint). The union-type connector is configured to allow adjustment and fixation of the installation angle of the flat nozzle 3 on the spray pipe 2. This union-type connector allows the operator to flexibly adjust and ultimately fix the spray angle of the flat nozzle 3 on the spray pipe 2 according to actual production conditions, ensuring that the cooling water can cover the surface of the billet 4 at the optimal angle.

[0021] In a preferred embodiment, the number of spray pipes 2 can be greater than the number of flat nozzles 3. Operators can selectively install nozzles according to the cooling intensity requirements. Spray pipes 2 that are not in use can be sealed with plugs, thereby improving configuration flexibility.

[0022] like Figure 3 As shown, the flat nozzle 3 is configured to spray a fan-shaped water curtain 31 with a fan-shaped cross-section. The fan-shaped water curtain 31 sprays onto the billet 4 to form a first covering surface 32 with an aspect ratio greater than a preset threshold. The outlet of the flat nozzle 3 is a flat slit, and the length direction of the flat slit corresponds to the length direction of the first covering surface 32. In a preferred embodiment, the preset threshold for the aspect ratio of the first covering surface 32 is usually greater than three, so that the covering surface presents a distinctly elongated shape.

[0023] like Figure 7 As shown, in contrast, the conventional nozzle 5 sprays out a conical water curtain 51 with a conical cross section, and the conical water curtain 51 sprays onto the square billet 4 to form a near-circular second covering surface 52.

[0024] Since the length of the billet 4 is much greater than its width or thickness, the flat nozzle 3 of this invention has a greater advantage, as the elongated first covering surface 32 formed by its spray can cover a larger area of ​​the billet 4 along its length. (Reference) Figure 8 and Figure 9 When spraying the same surface of billet 4 with the same number of flat nozzles 3 and traditional nozzles 5, the flat nozzles 3 cover a larger area. Similarly, when spraying and cooling the same billet 4, the flat nozzles 3 require less nozzles than the traditional nozzles 5, and using fewer nozzles means lower procurement, installation and maintenance costs.

[0025] like Figures 4 to 6 As shown, the flat nozzles 3 are configured such that the length direction of the first covering surface 32 is consistent with the length direction (i.e., the drawing direction) of the billet 4, and the width direction of the first covering surface 32 is consistent with the width or thickness direction of the billet 4. The flat nozzles 3 are arranged at intervals along the length direction of the spray bar 1, and the spacing of the flat nozzles 3 is configured such that two adjacent first covering surfaces 32 formed on the same cooling surface of the billet 4 overlap each other, thereby comprehensively and fully cooling the billet 4.

[0026] In a preferred embodiment, the width of the overlapping area is 10% to 30% of the width of a single first covering surface 32, thereby cooling the billet 4 comprehensively, fully and uniformly, effectively avoiding cooling bands caused by insufficient coverage or local overcooling caused by excessive overlap.

[0027] Four sets of spray bars 1 are provided, each corresponding to one of the four cooling surfaces of the billet 4, thereby providing comprehensive cooling for the billet 4. The billet 4 has two opposing arc-shaped cooling surfaces. The flat nozzles 3 installed on the spray bars 1 corresponding to the arc-shaped cooling surfaces are configured at an angle so that the spray direction is directed toward the arc-shaped cooling surfaces to ensure effective coverage of the cooling water.

[0028] The installation of the flat nozzles 3 on the spray strips 1 corresponding to the other two cooling surfaces of the billet 4 is configured to adapt to the curvature of the billet 4's travel trajectory. Specifically, the installation angle of each flat nozzle 3 can be adjusted so that its spray direction converges at the center of curvature of the billet 4's travel trajectory; or the spray strip 1 itself can be set as an arc-shaped structure that matches the curvature, thereby ensuring uniform spraying throughout the entire width direction.

[0029] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.

Claims

1. A spray cooling mechanism for a billet continuous casting machine, characterized in that: Includes a spray bar (1), on which a plurality of flat nozzles (3) are arranged; The flat nozzle (3) is configured to spray a fan-shaped water curtain (31) with a fan-shaped cross section. The fan-shaped water curtain (31) sprays onto the billet (4) to form a first coverage surface (32) with an aspect ratio greater than a preset threshold. The flat nozzle (3) is configured such that the length direction of the first covering surface (32) is consistent with the length direction of the billet (4), and the width direction of the first covering surface (32) is consistent with the width or thickness direction of the billet (4).

2. The spray cooling mechanism for a billet continuous casting machine according to claim 1, characterized in that: The flat nozzles (3) are arranged at intervals along the length of the spray bar (1), and the arrangement intervals of the flat nozzles (3) are configured such that two adjacent first covering surfaces (32) formed on the same cooling surface of the billet (4) overlap each other.

3. A spray cooling mechanism for a billet continuous casting machine according to claim 2, characterized in that: The spray bar (1) is provided with a plurality of spray pipes (2), and the flat nozzle (3) is detachably installed on the spray pipes (2).

4. A spray cooling mechanism for a billet continuous casting machine according to claim 3, characterized in that: The flat nozzle (3) is adjustablely connected to the spray pipe (2) via a swivel connector.

5. A spray cooling mechanism for a billet continuous casting machine according to claim 4, characterized in that: The swivel connector is configured to allow adjustment and fixation of the mounting angle of the flat nozzle (3) on the spray pipe (2).

6. A spray cooling mechanism for a billet continuous casting machine according to claim 1, characterized in that: The spray bar (1) is provided in four sets, which correspond to the four cooling surfaces of the billet (4).

7. A spray cooling mechanism for a billet continuous casting machine according to claim 6, characterized in that: The billet (4) has two opposing arc-shaped cooling surfaces, and the flat nozzle (3) installed on the spray bar (1) corresponding to the arc-shaped cooling surface is configured at an angle such that the spray direction is toward the arc-shaped cooling surface.

8. A spray cooling mechanism for a billet continuous casting machine according to claim 7, characterized in that: The installation of the flat nozzles (3) on the spray strips (1) corresponding to the other two cooling surfaces of the billet (4) is configured to adapt to the curvature of the billet (4)'s travel trajectory.

9. A spray cooling mechanism for a billet continuous casting machine according to claim 1, characterized in that: The outlet of the flat nozzle (3) is a flat slit, the length direction of which corresponds to the length direction of the first covering surface (32).

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