Sector section device for large-rolling-reduction rolling of continuous casting slab and free rolling segmentation roller

Abstract

The utility model provides a fan-shaped section device and a free reduction subsection roller for large reduction of a continuous casting slab, end bearings are arranged on the left side and the right side of the fan-shaped section free reduction subsection roller, a plurality of rollers are arranged between the two end bearings, a middle bearing is arranged between the end parts of every two adjacent rollers, and the middle bearings are connected with the fan-shaped section free reduction subsection roller. The surface of the side, close to the continuous casting slab, of a bearing seat of the middle bearing is lower than the surface of the roller, and a high-strength and high-temperature-resistant non-metal material sheet is inlaid in the surface of the side, close to the continuous casting slab, of the bearing seat. The middle bearing seat has the advantages that during continuous casting production under heavy pressure, the top surfaces of the two middle bearing seats are simultaneously in contact with the surface of a casting blank and participate in pressing extrusion on the casting blank together with a roller, so that the surface of the casting blank at the position does not bulge, and the quality of the casting blank is ensured. As the bearing seat and the surface of the casting blank are in a sliding extrusion state, and the high-strength and high-temperature-resistant non-metal material is embedded in the top surface of the bearing seat, not only can the durable use be ensured, but also the surface of the casting blank can be prevented from being scratched.

Description

Technical Field

[0001] The utility model relates to production equipment for continuous casting slab sector segments, in particular to a sector segment free pressing down segment roller for pressing down a continuous casting slab with a large pressing amount and a sector segment free pressing down device. Background Art

[0002] The top surface of the middle bearing seat of the conventional continuous casting slab sector segment roller (taking the three-segment roller as an example) is generally about 10mm lower than the roller surface. During the conventional continuous casting production process, only the roller is in contact with the billet and clamps the billet, while the top surface of the middle bearing seat is not in contact with the billet. Even during the continuous casting production process under dynamic light pressure, the top surface of the middle bearing seat is still not in contact with the billet due to the slight amount of roller depression (<1mm). During the continuous casting production process under heavy pressure, the roller must be depressed by a large amount (≥3mm). Since the middle bearing seat of the roller is suspended, the billet surface here cannot be depressed and squeezed, and a bulge will appear, which seriously affects the billet quality and causes the billet quality to be unqualified. Utility Model Content

[0003] The utility model provides a fan-shaped free pressing segmented roller for pressing a continuous casting slab with a large pressing amount, the fan-shaped free pressing segmented roller comprises a mounting frame, the mounting frame is provided with end bearings on the left and right sides of the continuous casting slab transportation direction, a plurality of rollers disconnected from each other and connected in a line are provided between two end bearings, the outer diameters of the rollers are on the same plane,

[0004] An intermediate bearing is provided between the ends of adjacent rollers, and the intermediate bearing is fixedly mounted on the mounting frame. The surface of the bearing seat of the intermediate bearing close to the continuous casting slab is 2 mm lower than the surface of the roller, and the surface of the bearing seat close to the continuous casting slab is inlaid with a high-strength and high-temperature resistant non-metallic material sheet. The outer surface of the non-metallic material sheet is arc-shaped and is on the same circumferential surface as the outer circumferential surface of the bearing seat.

[0005] Furthermore, the non-metallic material sheet is ceramic, carbon fiber or graphite.

[0006] Furthermore, the thickness of the non-metallic material sheet is greater than or equal to 5 mm.

[0007] The invention discloses a free pressing sector segment device for a continuous casting slab, wherein the free pressing sector segment device for the continuous casting slab has a plurality of sets of sector free pressing segment rollers distributed closely in the continuous casting slab transport direction.

[0008] The advantages of the utility model are:

[0009] During the continuous casting process under heavy pressure, when the roller's depression is ≥2mm, the top surfaces of the two intermediate bearing seats also contact the surface of the billet at the same time, and participate in the depression and extrusion of the billet together with the roller, so that there will be no bulge on the surface of the billet here, to ensure the quality of the billet. Since the bearing seat and the surface of the billet are in a state of sliding and extrusion, the high-strength and high-temperature resistant non-metallic material inlaid on its top surface can not only ensure durable use, but also ensure that the surface of the billet is not scratched.

[0010] This technology can meet the needs of conventional continuous casting production process operation, that is, the roller reduction amount during dynamic light reduction is less than 1mm to eliminate the internal center segregation of the slab. It can also meet the needs of heavy pressure continuous casting production process operation, that is, the roller reduction amount is ≥3mm, which can meet the needs of implementing a large thickness reduction reduction on the slab to eliminate the quality defects such as internal center segregation, looseness and shrinkage of the slab, significantly improve the internal quality of the slab, and is conducive to the production of high-quality continuous casting slabs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0012] Figure 1 A schematic diagram of a fan-shaped free pressing segmented roller for pressing down a continuous casting slab with a large pressing amount provided by the utility model;

[0013] Figure 2 for Figure 1 Cross-section view along the AA direction. DETAILED DESCRIPTION

[0014] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0015] In order to thoroughly understand the present invention, detailed steps and detailed structures will be presented in the following description to illustrate the technical solution of the present invention. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other implementations.

[0016] Reference Figure 1-2As shown, the utility model provides a fan-shaped segment free pressing three-section roller for pressing a continuous casting slab with a large pressing amount. The fan-shaped segment free pressing segment roller includes a mounting frame, and the mounting frame is provided with end bearings 1 on the left and right sides of the continuous casting slab transportation direction. Three sections of rollers with different lengths and disconnected from each other are provided between the two end bearings 1, namely a left roller 2, a middle roller 4, and a right roller 5, and the outer diameters of these three rollers are on the same plane.

[0017] An intermediate bearing 3 is provided between the ends of adjacent rollers. The intermediate bearing 3 is fixedly mounted on the mounting frame. The surface of the bearing seat of the intermediate bearing 3 close to the continuous casting slab is 2 mm lower than the roller surface, and the surface of the bearing seat of the intermediate bearing 3 close to the continuous casting slab is inlaid with a high-strength and high-temperature resistant non-metallic material sheet 6. The outer surface of the non-metallic material sheet 6 is arc-shaped and is on the same circumferential surface as the outer circumferential surface of the bearing seat of the intermediate bearing 3.

[0018] During the continuous casting process under heavy pressure, when the roller's depression is ≥2mm, the top surfaces of the bearing seats of the two intermediate bearings 3 also contact the surface of the billet at the same time, and participate in the depression and extrusion of the billet together with the roller, so that there will be no bulge on the surface of the billet here, so as to ensure the quality of the billet. Since the bearing seat of the intermediate bearing 3 and the surface of the billet are in a sliding and extruding state, the high-strength and high-temperature resistant non-metallic material inlaid on the top surface of the bearing seat can not only ensure durable use, but also ensure that the surface of the billet is not scratched.

[0019] In an optional embodiment, the non-metallic material sheet 6 is ceramic, carbon fiber or graphite, all of which have excellent high temperature resistance and high strength properties and can withstand the high temperature and high pressure in the continuous casting process.

[0020] The utility model embeds a high-strength and high-temperature-resistant non-metallic material sheet 6 on the surface of the bearing seat of the intermediate bearing 3 of the segmented roller that freely presses down the fan-shaped segment near the continuous casting slab, so that when the continuous casting production process is operated under heavy pressure, the top surfaces of the bearing seats of the two intermediate bearings 3 can contact the surface of the casting slab at the same time and participate in the pressing and extruding of the casting slab. This structural design not only ensures the quality of the casting slab, but also reduces the wear of the bearing seat and increases the operating life of the continuous casting equipment.

[0021] In the selection of the non-metallic material sheet 6, thickness is a crucial parameter. The preferred thickness of the non-metallic material sheet 6 should not be less than 5 mm. Such a thickness can ensure that the non-metallic material sheet 6 has high stability and durability in practical applications. First of all, the thickness of the non-metallic material sheet 6 directly affects its load-bearing capacity and compressive resistance. By selecting a thickness of 5 mm and above, it can be ensured that the non-metallic material sheet 6 will not be deformed or damaged when subjected to a large load, thereby ensuring the quality and service life of the product. Secondly, an appropriate thickness helps to improve the wear resistance and corrosion resistance of the non-metallic material sheet 6. A thickness of 5 mm and above can increase the surface area of ​​the non-metallic material sheet 6, improve its wear resistance and corrosion resistance, and maintain stable performance.

[0022] In addition, the thicker non-metallic material sheet 6 has better operability during processing and installation. Since the non-metallic material sheet 6 is an arc-shaped sheet embedded in the surface of the intermediate bearing seat, there are certain requirements for manufacturing and installation. A thickness of 5 mm or more can make the non-metallic material sheet 6 easier to operate during cutting, grinding and other processing processes, thereby improving processing efficiency. At the same time, the thicker non-metallic material sheet 6 has higher stability during installation, is less likely to be displaced or deformed, and ensures the quality of embedded installation.

[0023] The free-pressing sector-shaped segment device of the continuous casting slab has several sets of sector-shaped free-pressing segment rollers distributed closely in the transportation direction of the continuous casting slab.

[0024] The sector-shaped free-pressing segmented roller provided by the utility model is suitable for both idle rollers and driving rollers, and can be installed on heavy-pressing sector-shaped segments, large-pressing sector-shaped segments and free-pressing sector-shaped segments, etc., and can implement a large-scale thickness reduction and pressing production process operation on the sector-shaped segments of the continuous casting slab to eliminate quality defects such as center segregation, internal looseness and shrinkage holes of the slab, improve the internal quality of the slab, and produce high-quality continuous casting slabs.

[0025] The above describes the preferred embodiments of the utility model. It should be understood that the utility model is not limited to the above-mentioned specific implementation methods, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the utility model without departing from the scope of the technical solution of the utility model, or modify them into equivalent embodiments of equivalent changes, which does not affect the essential content of the utility model. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of protection of the technical solution of the utility model.

Claims

1. A fan-shaped free pressing segmented roller for pressing down a continuous casting slab with a large amount of pressing, the fan-shaped free pressing segmented roller comprising a mounting frame, characterized in that: The mounting frame is provided with end bearings (1) on the left and right sides of the continuous casting slab transport direction, and a plurality of rollers disconnected from each other and connected in a line are provided between the two end bearings (1), and the outer diameters of the rollers are on the same plane. An intermediate bearing (3) is provided between the ends of adjacent rollers. The intermediate bearing (3) is fixedly mounted on the mounting frame. The surface of the bearing seat of the intermediate bearing (3) close to the continuous casting slab is 2 mm lower than the surface of the roller. The surface of the bearing seat close to the continuous casting slab is inlaid with a high-strength and high-temperature resistant non-metallic material sheet (6). The outer surface of the non-metallic material sheet (6) is arc-shaped and is on the same circumferential surface as the outer circumferential surface of the bearing seat.

2. A sector-shaped free-pressing segmented roller for pressing down a continuous casting slab with a large reduction amount as claimed in claim 1, characterized in that: The non-metallic material sheet (6) is ceramic, carbon fiber or graphite.

3. A sector-shaped free-pressing segmented roller for pressing down a continuous casting slab with a large reduction amount as claimed in claim 2, characterized in that: The thickness of the non-metallic material sheet (6) is greater than or equal to 5 mm.

4. A free-pressing sector device for continuous casting slab, characterized in that: The free-pressing sector segment device of the continuous casting slab has several sets of sector free-pressing segment rollers as described in any one of claims 1 to 3 distributed closely in the transport direction of the continuous casting slab.

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