Square billet continuous casting machine crystallizer anti-overflow burning shield

Abstract

The utility model relates to an anti-overflow burning shield for a crystallizer of a billet continuous casting machine, and belongs to the technical field of continuous casting production equipment in the metallurgical industry. According to the technical scheme, a cover plate (11) is fixed to a crystallizer copper pipe (21) through a crystallizer upper flange plate (22) and a crystallizer upper pressing plate (23), and a main protection plate (1) is fixed to the cover plate (11) through a guide and guard base plate (3); the main protection plate (1), the guide and guard base plate (3) and the cover plate (11) are respectively provided with a central hole, the central hole of the main protection plate (1) is a stepped hole with a large upper part and a small lower part, an annular groove (4) with a downward opening is formed in the periphery of the main protection plate (1), the upper surface of the cover plate (11) is of a groove-shaped structure (14), and the annular groove (4) with the downward opening in the periphery of the main protection plate (1) is matched with the groove-shaped structure (14) on the upper surface of the cover plate (11). The liquid level detection device has the beneficial effect that molten steel can be prevented from overflowing to burn out accessory equipment such as the crystallization body and an accessory liquid level detection cable.

Description

Technical Field

[0001] The utility model relates to an anti-overflow protection cover for a crystallizer of a square billet continuous casting machine, belonging to the technical field of continuous casting production equipment in the metallurgical industry. Background Art

[0002] The traditional cover plate of the continuous casting billet crystallizer is suspended above the crystallizer, which can only prevent steam diffusion. Since the crystallizer is placed under the cover plate, after a molten steel overflow accident occurs, the overflowing molten steel overflows along the upper surface of the crystallizer, burning the crystallization structure and auxiliary equipment such as the automatic liquid level control detection cable. In severe cases, the overflowing molten steel flows along the crystallizer to the vibration device structure, affecting the vibration of the crystallizer, resulting in the interruption of casting production, and it is difficult to deal with the accident later. Utility Model Content

[0003] The utility model aims to provide a square billet continuous casting machine crystallizer overflow prevention shield, which can prevent molten steel from overflowing and burning the crystallization structure body and auxiliary equipment such as auxiliary liquid level detection cables, and solve the problems existing in the background technology.

[0004] The technical solution of the utility model is:

[0005] A crystallizer overflow prevention shield for a square billet continuous casting machine comprises a main guard plate and a cover plate, wherein the cover plate is fixed to a copper tube of the crystallizer through an upper flange plate and an upper pressure plate of the crystallizer, and the main guard plate is fixed to the cover plate through a guide pad; the main guard plate, the guide pad plate and the cover plate are respectively provided with a center hole matching the outer contour of the copper tube of the crystallizer, the center hole of the main guard plate is a stepped hole which is larger at the top and smaller at the bottom, an annular groove opening downward is provided around the main guard plate, the upper surface of the cover plate is a groove-shaped structure, and the downward-opening annular grooves around the main guard plate match the groove-shaped structure on the upper surface of the cover plate.

[0006] The groove-shaped structure on the upper surface of the cover plate is a groove-shaped structure formed by an upper extended anti-overflow plate arranged on the cover plate.

[0007] The cover plate is provided with a cover plate hook.

[0008] The annular groove opening downwards around the main guard plate is formed between a drooping anti-overflow plate fixed on the outer edge of the main guard plate and the main guard plate.

[0009] The main guard plate, the drooping anti-overflow plate on the outer edge and the guide pad below form an integrated structure.

[0010] The beneficial effect of the utility model is that after a steel overflow accident occurs in the crystallizer, the overflowed molten steel enters the groove-shaped structure on the upper surface of the cover plate, so that the crystallizer body, auxiliary equipment and the crystallizer vibration system are protected and the accident is prevented from expanding. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a top view of the main guard plate of the utility model;

[0012] Figure 2 This is a bottom view of the main guard plate of the utility model;

[0013] Figure 3 for Figure 1 AA section view;

[0014] Figure 4 This is a top view of the cover plate of the utility model;

[0015] Figure 5 for Figure 4 BB cross-sectional view;

[0016] Figure 6 This is a schematic diagram of the crystallizer without a protective cover installed;

[0017] Figure 7 This is a schematic diagram of the installation state of the utility model;

[0018] Figure 8 for Figure 7 CC section view;

[0019] In the figure: main guard plate 1, drooping anti-overflow plate 2, guide pad 3, annular groove 4;

[0020] Cover plate 11, upper anti-overflow plate 12, cover plate hook 13, groove-shaped structure 14, air release valve notch 15;

[0021] Crystallizer copper tube 21, crystallizer upper flange plate 22, crystallizer upper pressure plate 23; DETAILED DESCRIPTION

[0022] The present invention will be further described below by way of examples with reference to the accompanying drawings.

[0023] Refer to the attached Figure 1-8 A square billet continuous casting machine crystallizer anti-overflow protection cover comprises a main guard plate 1 and a cover plate 11. The cover plate 11 is fixed on the crystallizer copper tube 21 through the crystallizer upper flange plate 22 and the crystallizer upper pressure plate 23. The main guard plate 1 is fixed on the cover plate 11 through the guide pad 3. The main guard plate 1, the guide pad 3 and the cover plate 11 are respectively provided with a center hole matching the outer contour of the crystallizer copper tube 21. The center hole of the main guard plate 1 is a stepped hole with a larger upper part and a smaller lower part. The main guard plate 1 is provided with an annular groove 4 with an opening downward around it. The upper surface of the cover plate 11 is a groove-shaped structure 14. The annular groove 4 with an opening downward around the main guard plate 1 matches the groove-shaped structure 14 on the upper surface of the cover plate 11.

[0024] In this embodiment, refer to the attached Figure 4 , 5The cover plate 11 is a rectangular plate with cover plate hooks 13 welded on both sides and a central hole. The radius r of the central hole is larger than the radius of the crystallizer flange plate 22 and smaller than the radius R1 of the crystallizer main guard plate 1. The height h of the upper edge anti-overflow plate 12 on the central hole of the cover plate 11 is 20 mm, that is, the depth of the groove-shaped structure 14, which can receive the molten steel overflowing from the crystallizer along with the vibration guard plate to prevent the overflowed molten steel from burning the crystallizer main equipment.

[0025] Refer to the attached Figure 1 , 2 3. The main guard plate 1 is welded with the drooping anti-overflow plate 2 on the outer edge and the guide pad 3 below to form an integral structure, and can also be machined or cast as a whole. The lowest point of the drooping anti-overflow plate 2, the absolute height H of the lower edge of the outer contour, that is, the depth of the annular groove 4, H is higher than the height h of the upper extension anti-overflow plate 12 of the cover plate 11. The height difference must take into account the amplitude of the crystallizer. Under normal circumstances, Hh=5mm~10mm.

[0026] Refer to the attached Figure 6 , 7 8. The radius of the upper flange plate of the crystallizer is 290 mm, the radius r of the center hole of the cover plate 11 is 305 mm, the outer contour R1 of the main guard plate 1 is 340 mm, and the main guard plate 1 is seamlessly mounted on the upper pressure plate 22 of the crystallizer. During operation, it vibrates with the crystallizer body, and its purpose is to lift the working surface of the crystallizer to above the crystallizer cover plate.

[0027] After the new type of shield is installed, the working surface of the crystallizer is lifted above the cover plate. After a steel overflow accident occurs, the overflowing molten steel is completely isolated outside the crystallizer shield, and the crystallizer body, auxiliary equipment, and vibration system are protected. Its advantages are:

[0028] First, after a molten steel overflow accident occurs, the bolts of the upper pressure plate and upper flange plate of the crystallizer are protected;

[0029] Second, after the molten steel overflow accident, the automatic liquid level control detection line of the crystallizer was protected to prevent the accident from expanding;

[0030] Third, after a molten steel overflow accident occurs, the overflowed molten steel is isolated in the groove structure of the crystallizer cover plate and will no longer be cast onto the crystallizer vibration device, thus reducing the accident handling time.

Claims

1. A square billet continuous casting machine crystallizer anti-overflow protection cover, characterized in that: The invention comprises a main guard plate (1) and a cover plate (11), wherein the cover plate (11) is fixed to the crystallizer copper tube (21) through a crystallizer upper flange plate (22) and a crystallizer upper pressure plate (23), and the main guard plate (1) is fixed to the cover plate (11) through a guide pad (3); the main guard plate (1), the guide pad (3) and the cover plate (11) are respectively provided with a center hole matching the outer contour of the crystallizer copper tube (21), the center hole of the main guard plate (1) is a stepped hole with a larger upper portion and a smaller lower portion, an annular groove (4) opening downward is provided around the main guard plate (1), the upper surface of the cover plate (11) is a groove-shaped structure (14), and the annular groove (4) opening downward around the main guard plate (1) matches the groove-shaped structure (14) on the upper surface of the cover plate (11).

2. The anti-overflow protection cover for a crystallizer of a square billet continuous casting machine according to claim 1, characterized in that: The groove-shaped structure (14) on the upper surface of the cover plate (11) is a groove-shaped structure formed by an upper extended anti-overflow plate (12) arranged on the cover plate (11).

3. The anti-overflow protection cover for a crystallizer of a square billet continuous casting machine according to claim 2, characterized in that: The cover plate (11) is provided with a cover plate hook (13).

4. The anti-overflow protection cover for a crystallizer of a square billet continuous casting machine according to claim 1, characterized in that: The downwardly opening annular groove (4) around the main guard plate (1) is formed between the drooping anti-overflow plate (2) fixed to the outer edge of the main guard plate (1) and the main guard plate (1).

5. The anti-overflow protection cover for a crystallizer of a square billet continuous casting machine according to claim 4, characterized in that: The main guard plate (1), the drooping anti-overflow plate (2) on the outer edge, and the guide pad (3) below form an integrated structure.

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