Quickly-replaceable secondary cooling spraying system of small billet continuous casting machine

Abstract

The utility model relates to a quick-to-replace secondary cooling spraying system of a small square billet continuous casting machine, which comprises a foot roller section spraying pipe group, an arc-shaped first-section spraying pipe group, an arc-shaped second-section spraying pipe group and an arc-shaped third-section spraying pipe group which respectively comprise an outer arc spraying pipe, an inner arc spraying pipe and a side spraying pipe, a steel billet spraying gap is formed among the outer arc spraying pipe, the inner arc spraying pipe and the side edge spraying pipe, the section of the steel billet spraying gap forms a spraying section, and nozzles are arranged on the outer arc spraying pipe, the inner arc spraying pipe and the side edge spraying pipe. Through the front spraying nozzles and the rear spraying nozzles which are additionally arranged on the side spraying pipes, steel billets in a spraying section with the length and width of 150mm or 130mm can be sprayed under the condition that the spraying pipes are not replaced, the operability is high, the necessary operation time for replacing the spraying pipes when the size of the spraying section is changed is shortened, and the working efficiency is improved. The spraying system can carry out spraying operation on four spraying sections of 130 mm in length and width, 150 mm in length and width and 165 mm in length and width on the premise that the spraying pipe is not replaced, and the adaptive capacity is high.

Description

Technical Field

[0001] The utility model relates to the technical field of continuous casting of steel billets, in particular to a secondary cooling spray system for a small billet continuous caster with quick replacement. Background Art

[0002] The small billet continuous caster is generally designed with one cross-section or two cross-sections with similar sizes. When changing the cross-section, generally the nozzles of the corresponding cross-section are replaced and the secondary cooling spray headers are adjusted or replaced. When changing to a cross-section with a large difference, the nozzles and spray pipes need to be replaced, which has a large workload and takes a long time.

[0003] Therefore, we improved the original spray system to reduce the replacement workload of nozzles or spray pipes when spraying on four spray cross-sections with lengths and widths of 130mm, 150mm, 160mm, and 165mm. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a secondary cooling spray system for a small billet continuous caster with quick replacement, which does not need to replace the spray pipes when spraying on four spray cross-sections with lengths and widths of 130mm, 150mm, 160mm, and 165mm, aiming at the deficiencies of the prior art.

[0005] The technical problem to be solved by the utility model is realized through the following technical solutions. A secondary cooling spray system for a small billet continuous caster with quick replacement includes a full-roll section spray pipe group, an arc section I spray pipe group, an arc section II spray pipe group, and an arc section III spray pipe group arranged sequentially downward from the mold. The arc section I spray pipe group, the arc section II spray pipe group, and the arc section III spray pipe group each include an outer arc spray pipe, an inner arc spray pipe, and a side spray pipe arranged sequentially along the billet drawing direction. A steel billet spray gap is formed by a group of outer arc spray pipes, a group of inner arc spray pipes, and a pair of side spray pipes arranged at intervals. The cross-section of the steel billet spray gap forms a spray cross-section. The system also includes connecting frame I and connecting frame II bolted to the mold. Bracket I and bracket II are installed on connecting frame I, and bracket III is installed on connecting frame II. The arc section I spray pipe group is installed on connecting frame I, the arc section II spray pipe group is installed on connecting frame II, and the arc section III spray pipe group is installed on bracket III. Nozzles are arranged on the outer arc spray pipe, the inner arc spray pipe, and the side spray pipe, and the nozzles are arranged along the length directions of the outer arc spray pipe, the inner arc spray pipe, and the side spray pipe. The nozzles face the steel billet spray gap to spray the steel billet in the steel billet spray gap.

[0006] A front spray nozzle for spraying on a 150mm spray cross-section is arranged on the front side of the nozzles on the side spray pipe. The horizontal distance between the front spray nozzle and the nozzles on the side spray pipe is 20mm, and the longitudinal distance is 25mm.

[0007] A rear spray nozzle for spraying a spray section with a length and width of 130 mm is provided at the rear side of the nozzle on the side spray pipe. The horizontal distance between the rear spray nozzle and the nozzle on the side spray pipe is 20 mm, and the longitudinal distance is 37.5 mm.

[0008] The technical problem to be solved by the present utility model can also be achieved through the following technical solution. For the above-mentioned secondary cooling spray system of a small billet continuous casting machine with quick replacement, the nozzles on the side spray pipes, the front spray nozzles and the rear spray nozzles have the same diameter.

[0009] The technical problem to be solved by the present utility model can also be achieved through the following technical solution. For the above-mentioned secondary cooling spray system of a small billet continuous casting machine with quick replacement, the shortest distance between the nozzle on the side spray pipe and the front spray nozzle is 32 mm.

[0010] The technical problem to be solved by the present utility model can also be achieved through the following technical solution. For the above-mentioned secondary cooling spray system of a small billet continuous casting machine with quick replacement, the shortest distance between the nozzle on the side spray pipe and the rear spray nozzle is 43 mm.

[0011] The technical problem to be solved by the present utility model can also be achieved through the following technical solution. For the above-mentioned secondary cooling spray system of a small billet continuous casting machine with quick replacement, the shortest distance between the front spray nozzle and the rear spray nozzle is 42 mm.

[0012] The technical problem to be solved by the present utility model can also be achieved through the following technical solution. For the above-mentioned secondary cooling spray system of a small billet continuous casting machine with quick replacement, the outer diameter of the side spray pipe is 100 mm, and the nozzle on the side spray pipe is located at the middle position of the side spray pipe.

[0013] Compared with the prior art, the beneficial technical effects of the present utility model are as follows: By installing the front spray nozzle and the rear spray nozzle on the side spray pipe, it is possible to spray the steel billet within a spray section with a length and width of 150 mm or 130 mm without replacing the spray pipe. The operability is strong, and the necessary operation time for replacing the spray pipe when changing the size of the spray section is reduced. The spray system can perform spray operations for four spray sections with lengths and widths of 130 mm, 150 mm, 160 mm, and 165 mm without replacing the spray pipe, and has strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a structural schematic diagram of the present utility model;

[0015] Figure 2 is a structural schematic diagram of the front spray nozzle and the rear spray nozzle on the outer arc spray pipe of the present utility model.

[0016] Reference numerals:

[0017] 1. Spray pipe group for the foot roll section; 2. Spray pipe group for the first arc section; 3. Spray pipe group for the second arc section; 4. Spray pipe group for the third arc section; 5. Outer arc spray pipe; 6. Inner arc spray pipe; 7. Side spray pipe; 8. Connecting frame I; 9. Connecting frame II; 10. Support I; 11. Support II; 12. Front spray nozzle; 13. Rear spray nozzle. Detailed implementation manners

[0018] The following further describes the specific technical solutions of the present invention with reference to the accompanying drawings, so as to facilitate those skilled in the art to further understand the present invention without restricting its rights.

[0019] Example 1. Refer to Figure 1-2 , a secondary cooling spray system for a small billet continuous caster with quick replacement, which includes a spray pipe group 1 for the foot roll section, a spray pipe group 2 for the first arc section, a spray pipe group 3 for the second arc section, and a spray pipe group 4 for the third arc section that are sequentially arranged downward from the mold. The spray pipe groups 2, 3, and 4 for the arc sections each include an outer arc spray pipe 5, an inner arc spray pipe 6, and a side spray pipe 7 that are sequentially arranged along the billet drawing direction. A billet spray gap is formed by a group of outer arc spray pipes 5, a group of inner arc spray pipes 6, and a pair of side spray pipes 7 arranged at intervals. The cross-section of the billet spray gap forms a spray cross-section. It also includes a connecting frame I 8 and a connecting frame II 9 bolted to the mold. A support I 10 and a support II 11 are installed on the connecting frame I 8, and a support III 12 is installed on the connecting frame II 9. The spray pipe group 2 for the first arc section is installed on the connecting frame I 8, the spray pipe group 3 for the second arc section is installed on the connecting frame II 9, and the spray pipe group 4 for the third arc section is installed on the support III 12. Nozzles are provided on the outer arc spray pipe 5, the inner arc spray pipe 6, and the side spray pipe 7, and the nozzles are arranged along the length directions of the outer arc spray pipe 5, the inner arc spray pipe 6, and the side spray pipe 7. The nozzles face the billet spray gap to spray the billet in the billet spray gap;

[0020] On the front side of the nozzles on the side spray pipe 7, a front spray nozzle 13 for spraying a spray section with a length and width of 150 mm is provided. The horizontal distance between the front spray nozzle 13 and the nozzles on the side spray pipe 7 is 20 mm, the longitudinal distance is 25 mm, and the shortest distance between the nozzles on the side spray pipe 7 and the front spray nozzle 13 is 32 mm. On the rear side of the nozzles on the side spray pipe 7, a rear spray nozzle 14 for spraying a spray section with a length and width of 130 mm is provided. The horizontal distance between the rear spray nozzle 14 and the nozzles on the side spray pipe 7 is 20 mm, the longitudinal distance is 37.5 mm, and the shortest distance between the nozzles on the side spray pipe 7 and the rear spray nozzle 14 is 43 mm. The shortest distance between the front spray nozzle 13 and the rear spray nozzle 14 is 42 mm. The nozzles on the side spray pipe 7, the front spray nozzle 13, and the rear spray nozzle 14 have the same diameter. The outer diameter of the side spray pipe 7 is 100 mm, and the nozzles on the side spray pipe 7 are located at the middle position of the side spray pipe 7;

[0021] In addition, the front spray nozzle 12 and the rear spray nozzle 13 on the side spray pipe 7 can be independently supplied with water by an internal pipeline formed in the side spray pipe 7.

[0022] It should be noted that:

[0023] (1) The spray pipe group 1 of the full-roll section of the mold cannot be interchanged. When changing the spray section, replace the corresponding mold;

[0024] (2) For the nozzles on the outer arc spray pipe 5 of the arc first-stage spray pipe group 2, the arc second-stage spray pipe group 3, and the arc third-stage spray pipe group 4, it is only necessary to set the spraying angle to cover a range of 130 mm in length and width. When changing the spray section, there is no need to replace the nozzles and the spray pipes;

[0025] (3) For the nozzles on the inner arc spray pipe 6 of the arc first-stage spray pipe group 2, the arc second-stage spray pipe group 3, and the arc third-stage spray pipe group 4, when changing the section, only the spraying angle of the nozzles needs to be adjusted, and there is no need to replace the inner arc spray pipe 6;

[0026] (4) For the nozzles on the side spray pipe 7 of the arc first-stage spray pipe group 2, the arc second-stage spray pipe group 3, and the arc third-stage spray pipe group 4, when spraying a spray section with a length and width of 160 mm or 165 mm, only the original nozzles on the side spray pipe 7 can be used for spraying. When spraying a spray section with a length and width of 150 mm, the front spray nozzle 13 can be used for spraying. When spraying a spray section with a length and width of 130 mm, the rear spray nozzle 14 can be used for spraying, and there is no need to adjust the side spray pipe 7;

[0027] It reduces the necessary operation time for replacing the spray pipe when changing the spray cross-section size, enabling the spray system to perform spray operations with four spray cross-sections of 130mm, 150mm, 160mm, and 165mm in length and width without replacing the spray pipe, and it has strong adaptability.

Claims

1. A secondary cooling spray system for a small billet continuous casting machine with quick replacement, comprising a spray pipe group for the full roll section, a spray pipe group for the first arc section, a spray pipe group for the second arc section, and a spray pipe group for the third arc section, which are sequentially arranged downward from the mold. The spray pipe group for the first arc section, the spray pipe group for the second arc section, and the spray pipe group for the third arc section each include an outer arc spray pipe, an inner arc spray pipe, and a side spray pipe arranged in sequence along the billet drawing direction. A billet spray gap is formed by a group of outer arc spray pipes, a group of inner arc spray pipes, and a pair of side spray pipes arranged at intervals. The cross-section of the billet spray gap forms a spray cross-section. It also includes connecting frame Ⅰ and connecting frame Ⅱ bolted to the mold. Support Ⅰ and support Ⅱ are installed on connecting frame Ⅰ, and support Ⅲ is installed on connecting frame Ⅱ. The spray pipe group for the first arc section is installed on connecting frame Ⅰ, the spray pipe group for the second arc section is installed on connecting frame Ⅱ, and the spray pipe group for the third arc section is installed on support Ⅲ. It is characterized in that: Nozzles are provided on the outer arc spray pipe, inner arc spray pipe and side spray pipe. The nozzles are arranged along the length directions of the outer arc spray pipe, inner arc spray pipe and side spray pipe, and the nozzles are directed at the billet spray gap to spray the billet in the billet spray gap; A front spray nozzle for spraying a spray section with a length and width of 150 mm is arranged on the front side of the nozzle on the side spray pipe. The horizontal distance between the front spray nozzle and the nozzle on the side spray pipe is 20 mm, and the longitudinal distance is 25 mm; A rear spray nozzle for spraying a spray section with a length and width of 130 mm is arranged on the rear side of the nozzle on the side spray pipe. The horizontal distance between the rear spray nozzle and the nozzle on the side spray pipe is 20 mm, and the longitudinal distance is 37.5 mm.

2. The secondary cooling spray system of the billet continuous casting machine with quick replacement according to claim 1, characterized in that: The nozzles on the side spray pipe, the front spray nozzle and the rear spray nozzle have the same diameter.

3. The secondary cooling spray system for small billet continuous casting machine with quick replacement according to claim 1, characterized in that: The shortest distance between the nozzle on the side spray pipe and the front spray nozzle is 32 mm.

4. The secondary cooling spray system of the small billet continuous casting machine with quick replacement according to claim 1, wherein: The shortest distance between the nozzle on the side spray pipe and the rear spray nozzle is 43 mm.

5. The secondary cooling spray system for a small billet continuous casting machine with quick replacement according to claim 1, characterized in that: The shortest distance between the front spray nozzle and the rear spray nozzle is 42 mm.

6. The secondary cooling spray system for a small billet continuous casting machine with quick replacement according to claim 1, wherein: The outer diameter of the side spray pipe is 100 mm, and the nozzle on the side spray pipe is located at the middle position of the side spray pipe.

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