Guide pillar type hanging plate type fan-shaped section of small-section slab continuous casting machine

Abstract

The invention belongs to the field of metallurgical machinery, and particularly relates to a guide column type hanging plate type fan-shaped section of a small-section slab continuous casting machine. The fan-shaped section comprises an upper frame, a lower frame, a movable beam, a first clamping mechanism, a second clamping mechanism, pressing mechanisms, guide wheels and a hanging plate, the movable beam is located in the middle of the upper frame, the pressing mechanisms are arranged at the two ends of the upper portion of the upper frame respectively, and the pressing mechanisms are connected with the upper frame and the movable beam through bolts respectively. A first clamping mechanism and a second clamping mechanism are arranged on the two sides of the pressing mechanism respectively and connected with the lower frame through a pull rod and a nut, a guide wheel is arranged between the first clamping mechanism and the second clamping mechanism, roll gap adjusters are arranged on the two sides of the guide wheel, a hanging plate is arranged above the guide wheel, and a protection plate is arranged below the hanging plate. An upper heat insulation cover, a first lower heat insulation cover and a second lower heat insulation cover are arranged between the protection plates. The expansion amount of the inlet clamping cylinder and the outlet clamping cylinder is measured through the displacement sensors at the head roller and the tail roller, and accurate control over the roller gap is achieved through the roller gap adjuster.

Description

Technical Field

[0001] This invention belongs to the field of metallurgical machinery, and specifically relates to a guide column type hanging plate type fan-shaped section for a small cross section billet continuous casting machine. Background Technology

[0002] The roll gap control precision of the sector section of a slab continuous casting machine is one of the core elements to ensure the final high-quality continuously cast slab. Center segregation and porosity defects formed during the solidification process of the slab are key issues affecting the internal quality of the steel. These internal defects significantly impair the final performance of the steel, leading to a series of serious quality problems. For example, center segregation disrupts the uniformity of the steel composition, thereby weakening its ductility and increasing the risk of brittle fracture during processing or under stress. Simultaneously, it negatively impacts the weldability of the steel, reducing the strength and toughness of welded joints. More seriously, segregated regions often accumulate harmful elements, which significantly reduces the steel's resistance to hydrogen-induced cracking (HIC), easily inducing catastrophic failure in harsh service environments such as those containing sulfur-containing oil and gas. Therefore, effectively suppressing or eliminating center segregation and porosity in the slab is crucial for improving the overall performance and reliability of the final steel product.

[0003] However, when using existing sector-shaped sections for light reduction technology, its effectiveness in improving center segregation and porosity defects in the cast billet is often unsatisfactory. This is mainly because conventional sector-shaped sections have inherent limitations in terms of roll gap setting accuracy, dynamic adjustment capability, and equipment rigidity. The roll gap value often fluctuates or fails to meet extremely high precision requirements, and it is difficult to achieve truly "gap-free" support during the casting flow propagation process, resulting in insufficient and unstable compaction at the solidification end of the cast billet. The reduction amount in light reduction is usually small, which is insufficient to compensate for the large voids generated in the center of the cast billet during solidification shrinkage. Summary of the Invention

[0004] To address the aforementioned problems, the present invention aims to provide a guide column type hanging plate fan-shaped section for a small cross-section slab continuous casting machine. This device measures the extension and retraction of the inlet and outlet clamping cylinders at the first and last rolls using displacement sensors, and achieves precise control of the roll gap through a roll gap adjuster. Then, for different steel grades, a large reduction is applied at the end of the slab solidification process, which significantly reduces center segregation and porosity defects in the slab, improves the internal quality of the slab and the flaw detection pass rate of the rolled plate, and effectively reduces the rolling compression ratio.

[0005] The technical solution of this invention is as follows: a guide column type hanging plate fan-shaped section for a small cross-section slab continuous casting machine, comprising an upper frame, a lower frame, a movable beam, a first clamping mechanism, a second clamping mechanism, a pressing mechanism, guide wheels, and a hanging plate. The movable beam is located in the middle of the upper frame. Pressing mechanisms are respectively provided at both ends of the upper part of the upper frame. The pressing mechanisms are connected to the upper frame and the movable beam respectively by bolts. A first clamping mechanism and a second clamping mechanism are respectively provided on both sides of the pressing mechanism. The first clamping mechanism and the second clamping mechanism have the same structure and are connected to the lower frame by a pull rod and a nut. A guide wheel is provided between the first clamping mechanism and the second clamping mechanism. Roll gap adjusters are provided on both sides of the guide wheel. A hanging plate is provided above the guide wheel. A protective plate is provided below the hanging plate. An upper heat insulation cover, a first lower heat insulation cover, and a second lower heat insulation cover are provided between the protective plates. Dust covers are provided on the outside of the upper heat insulation cover, the first lower heat insulation cover, and the second lower heat insulation cover. A first pipe clamp is provided at both ends of the lower frame, and a second pipe clamp is provided at both ends of the upper frame.

[0006] The upper frame includes an upper frame body, an upper reference plate, a long slide plate, a short slide plate, an upper free roller, an upper free roller water receiving plate, and a side slide plate. There are six sets of upper free rollers, which are located at the lower part of the upper frame body. The bearing seat of the upper free roller is provided with a set of gaskets and an upper free roller water receiving plate at the bottom. The set of gaskets and the upper free roller water receiving plate are respectively connected to the upper frame body by bolts.

[0007] The lower frame includes a lower frame body, a sliding plate, a lower free roller, a lower free roller water receiving plate, a left water receiving tray, a right water receiving tray, a bottom pad, and a guide for the ingot. There are six sets of lower free rollers, which are located at the bottom of the lower frame body. The bearing seat of the lower free roller is provided with a set of gaskets and a lower free roller water receiving plate. The set of gaskets and the lower free roller water receiving plate are respectively connected to the lower frame body by bolts.

[0008] The movable beam includes a movable beam body, a drive roller, a first sliding plate, a second sliding plate, a third sliding plate, and a drive roller water receiving plate. The bottom of the bearing seat of the drive roller is provided with a set of gaskets and a drive roller water receiving plate. The set of gaskets and the drive roller water receiving plate are respectively connected to the movable beam body by bolts.

[0009] The first clamping mechanism includes a sensor upper cover, a displacement sensor, a sensor lower cover, a locking nut, a pull rod, a clamping hydraulic cylinder, a clamping mechanism long slide plate, a guide post, a magnetic ring, and auxiliary components. The clamping mechanism long slide plate and the guide post are arranged sequentially on the outer side of the middle part of the pull rod, and the displacement sensor is arranged on the upper end of the pull rod.

[0010] The gap between the long sliding plate of the clamping mechanism and the sliding plate of the upper frame is 0.4mm; the gap between the long sliding plate of the movable beam and the upper frame is 0.5mm; and the gap between the short sliding plate of the movable beam and the upper frame is 0.5mm.

[0011] The pressing mechanism includes a drive roller pressing cylinder, a pressing cylinder pin, a bushing, and a spacer ring. A support base is provided below the drive roller pressing cylinder, and the support base is fixedly connected to the upper frame and the movable beam by bolts.

[0012] The technical advantages of this invention are as follows: This invention measures the extension and retraction of the inlet and outlet clamping cylinders by displacement sensors at the beginning and end rolls, and achieves precise control of the roll gap by a roll gap adjuster. Then, for different steel grades, a large reduction is applied at the end of the solidification of the billet, which significantly reduces the center segregation and porosity defects of the billet, improves the internal quality of the billet and the pass rate of the flaw detection of the rolled plate, and effectively reduces the rolling compression ratio.

[0013] The following will provide further explanation in conjunction with the accompanying drawings. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of a guide column type hanging plate fan-shaped section for a small cross section billet continuous casting machine according to the present invention.

[0015] Figure 2 This is a schematic diagram of the movable beam structure of the present invention.

[0016] Figure 3 This is a schematic diagram of the main structure of a guide column type hanging plate fan-shaped section of a small cross section billet continuous casting machine according to the present invention.

[0017] Figure 4 yes Figure 3 View A1 in the middle.

[0018] Figure 5 yes Figure 4 View from B1 to B1.

[0019] Figure 6 yes Figure 4 View from D1 to D1.

[0020] Figure 7 yes Figure 3 View from C1 to C1.

[0021] Figure 8 This is a schematic diagram of the mechanical lock of the present invention.

[0022] Figure 9 yes Figure 3 View from E1.

[0023] Figure 10 This is a top view of the upper frame structure of the present invention.

[0024] Figure 11 This is a schematic diagram of the upper frame structure of the present invention.

[0025] Figure 12 This is a top view of the lower frame structure.

[0026] Figure 13 This is a structural diagram of the lower frame.

[0027] Figure 14 This is a structural schematic diagram of the movable beam.

[0028] Figure 15 This is a schematic diagram of the pressing mechanism.

[0029] Figure 16 This is a schematic diagram of the structure of the first clamping mechanism of the present invention.

[0030] Reference numerals: 1-Upper frame; 2-Lower frame; 3-Moving beam; 4-First clamping mechanism; 5-Second clamping mechanism; 6-Pressing mechanism; 7-Guide wheel assembly; 8-Hanging plate; 9-Protective plate; 10-Upper heat insulation cover; 11-First lower heat insulation cover; 12-Second lower heat insulation cover; 13-Dust cover; 14-Roll gap adjuster; 15-First pipe clamp; 16-Second pipe clamp. 101-Upper frame body; 102-Upper reference plate; 103-Long slide plate; 104-Short slide plate; 105-Upper free roller; 106-Upper free roller water receiving plate; 107-Side slide plate; 21-Lower frame body; 22-Slide plate; 23-Lower free roller; 24-Lower free roller water receiving plate; 25-Left water receiving tray; 26-Right water receiving tray; 27-Bottom pad; 28-Ingot guide; 31-Moving beam body; 32-Drive roller; 33-First slide plate; 34-Second slide plate; 35-Third slide plate; 36-Drive roller water receiving plate; 41-Sensor upper cover; 42-Displacement sensor; 43-Sensor lower cover; 44-Locking nut; 45-Pull rod; 46-Clamping hydraulic cylinder; 47-Clamping mechanism long slide plate; 48-Guide column; 49-Magnetic ring; 410-Auxiliary parts; 61-Drive roller pressing cylinder; 62-Support seat; 63-Pressing cylinder pin; 64-Bushing; 65-Distance ring. Detailed Implementation Example 1

[0031] like Figures 1-16As shown, a guide column type hanging plate fan-shaped section of a small cross-section slab continuous casting machine includes an upper frame 1, a lower frame 2, a movable beam 3, a first clamping mechanism 4, a second clamping mechanism 5, a pressing mechanism 6, guide wheels 7, and a hanging plate 8. The movable beam 3 is located in the middle of the upper frame 1. Pressing mechanisms 6 are respectively provided at both ends of the upper part of the upper frame 1. The pressing mechanisms 6 are connected to the upper frame 1 and the movable beam 3 by bolts. The first clamping mechanism 4 and the second clamping mechanism 5 are respectively provided on both sides of the pressing mechanism 6. The first clamping mechanism 4 and the second clamping mechanism 5 have the same structure. The pull rod and nut are connected to the lower frame 2. A guide wheel 7 is provided between the first clamping mechanism 4 and the second clamping mechanism 5. Roller gap adjusters 14 are provided on both sides of the guide wheel 7. A hanging plate 8 is provided above the guide wheel 7. A protective plate 9 is provided below the hanging plate 8. An upper heat insulation cover 10, a first lower heat insulation cover 11 and a second lower heat insulation cover 12 are provided between the protective plates 9. A dust cover 13 is provided on the outside of the upper heat insulation cover 10, the first lower heat insulation cover 11 and the second lower heat insulation cover 12. A first pipe clamp 15 is provided at both ends of the lower frame 2. A second pipe clamp 16 is provided at both ends of the upper frame 1.

[0032] The device measures the extension and retraction of the inlet and outlet clamping cylinders using displacement sensors at the first and last rolls, and achieves precise control of the roll gap through a roll gap adjuster. Then, for different steel grades, a large reduction is applied at the end of the billet solidification, which significantly reduces the center segregation and porosity defects of the billet, improves the internal quality of the billet and the pass rate of the rolled plate flaw detection, and effectively reduces the rolling compression ratio.

[0033] The upper frame 1 includes an upper frame body 101, an upper reference plate 102, a long slide plate 103, a short slide plate 104, an upper free roller 105, an upper free roller water receiving plate 106, and a side slide plate 107. There are six sets of upper free rollers 105, which are located at the lower part of the upper frame body 101. The bearing seat of the upper free roller 105 is provided with a set of gaskets and an upper free roller water receiving plate 106. The set of gaskets and the upper free roller water receiving plate 106 are respectively connected to the upper frame body 101 by bolts.

[0034] The lower frame 2 includes a lower frame body 21, a sliding plate 22, a lower free roller 23, a lower free roller water receiving plate 24, a left water receiving tray 25, a right water receiving tray 26, a bottom pad 27, and a guide 28. There are six sets of lower free rollers 23, which are located at the lower part of the lower frame body 21. The bearing seat of the lower free roller 23 is provided with a set of gaskets and a lower free roller water receiving plate 24. The set of gaskets and the lower free roller water receiving plate 24 are respectively connected to the lower frame body 21 by bolts.

[0035] The movable beam 3 includes a movable beam body 31, a drive roller 32, a first sliding plate 33, a second sliding plate 34, a third sliding plate 35, and a drive roller water receiving plate 36. The bottom of the bearing seat of the drive roller 32 is provided with a set of gaskets and a drive roller water receiving plate 36. The set of gaskets and the drive roller water receiving plate 36 are respectively connected to the movable beam body 31 by bolts.

[0036] The first clamping mechanism 4 includes a sensor upper cover 41, a displacement sensor 42, a sensor lower cover 43, a locking nut 44, a pull rod 45, a clamping hydraulic cylinder 46, a clamping mechanism long slide plate 47, a guide post 48, a magnetic ring 49, and auxiliary components 410. The pull rod 45 is provided with the clamping mechanism long slide plate 47 and the guide post 48 in sequence on the outer side of the middle part. The pull rod 45 is provided with a displacement sensor 42 at the upper end.

[0037] The gap between the long sliding plate 47 of the clamping mechanism and the sliding plate of the upper frame 1 is 0.4mm; the gap between the long sliding plate of the movable beam 3 and the upper frame 1 is 0.5mm; and the gap between the short sliding plate of the movable beam 1 and the upper frame 1 is 0.5mm.

[0038] The pressing mechanism 6 includes a drive roller pressing cylinder 61, a pressing cylinder pin 63, a bushing 64, and a spacer ring 65. A support seat 62 is provided below the drive roller pressing cylinder 61. The support seat 62 is fixedly connected to the upper frame 1 and the movable beam 3 by bolts.

[0039] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A guide column type hanging plate type fan-shaped section for a small cross-section slab billet continuous casting machine, characterized in that: The system includes an upper frame (1), a lower frame (2), a movable beam (3), a first clamping mechanism (4), a second clamping mechanism (5), a pressing mechanism (6), a guide wheel (7), and a hanging plate (8). The movable beam (3) is located in the middle of the upper frame (1). The upper frame (1) has pressing mechanisms (6) at both ends. The pressing mechanisms (6) are connected to the upper frame (1) and the movable beam (3) by bolts. The pressing mechanisms (6) have a first clamping mechanism (4) and a second clamping mechanism (5) on both sides. The first clamping mechanism (4) and the second clamping mechanism (5) have the same structure and are connected to the lower frame (2) by a pull rod and a nut. A guide wheel (7) is provided between the first clamping mechanism (4) and the second clamping mechanism (5). Roller gap adjusters (14) are provided on both sides of the guide wheel (7). A hanging plate (8) is provided above the guide wheel (7). A protective plate (9) is provided below the hanging plate (8). An upper heat insulation cover (10), a first lower heat insulation cover (11), and a second lower heat insulation cover (12) are provided between the protective plates (9). A dust cover (13) is provided on the outside of the upper heat insulation cover (10), the first lower heat insulation cover (11), and the second lower heat insulation cover (12). A first pipe clamp (15) is provided at both ends of the lower frame (2). A second pipe clamp (16) is provided at both ends of the upper frame (1).

2. The guide column type hanging plate fan-shaped section of a small cross-section slab billet continuous casting machine according to claim 1, characterized in that: The upper frame (1) includes an upper frame body (101), an upper reference plate (102), a long slide plate (103), a short slide plate (104), an upper free roller (105), an upper free roller water receiving plate (106), and a side slide plate (107). There are six sets of upper free rollers (105), which are located at the lower part of the upper frame body (101). The bearing seat of the upper free roller (105) is provided with a set of gaskets and an upper free roller water receiving plate (106). The set of gaskets and the upper free roller water receiving plate (106) are respectively connected to the upper frame body (101) by bolts.

3. The guide column type hanging plate fan-shaped section of a small cross-section slab billet continuous casting machine according to claim 1, characterized in that: The lower frame (2) includes a lower frame body (21), a sliding plate (22), a lower free roller (23), a lower free roller water receiving plate (24), a left water receiving tray (25), a right water receiving tray (26), a bottom pad (27), and a spindle guide (28). There are six sets of lower free rollers (23), which are located at the lower part of the lower frame body (21). The bearing seat of the lower free roller (23) is provided with a set of gaskets and a lower free roller water receiving plate (24). The set of gaskets and the lower free roller water receiving plate (24) are respectively connected to the lower frame body (21) by bolts.

4. The guide column type hanging plate fan-shaped section of a small cross-section slab billet continuous casting machine according to claim 1, characterized in that: The movable beam (3) includes a movable beam body (31), a drive roller (32), a first sliding plate (33), a second sliding plate (34), a third sliding plate (35), and a drive roller water receiving plate (36). The bottom of the bearing seat of the drive roller (32) is provided with a gasket group and a drive roller water receiving plate (36). The gasket group and the drive roller water receiving plate (36) are respectively connected to the movable beam body (31) by bolts.

5. The guide column type hanging plate fan-shaped section of a small cross-section slab billet continuous casting machine according to claim 1, characterized in that: The first clamping mechanism (4) includes a sensor upper cover (41), a displacement sensor (42), a sensor lower cover (43), a locking nut (44), a pull rod (45), a clamping hydraulic cylinder (46), a clamping mechanism long slide plate (47), a guide post (48), a magnetic ring (49), and auxiliary components (410). The pull rod (45) is provided with the clamping mechanism long slide plate (47) and the guide post (48) in sequence on the outer side of the middle part. The pull rod (45) is provided with a displacement sensor (42) at the upper end.

6. The guide column type hanging plate fan-shaped section of a small cross-section slab billet continuous casting machine according to claim 1, characterized in that: The gap between the long slide plate (47) of the clamping mechanism and the slide plate of the upper frame (1) is 0.4mm; the gap between the long slide plate of the movable beam (3) and the upper frame (1) is 0.5mm; and the gap between the short slide plate of the movable beam (1) and the upper frame (1) is 0.5mm.

7. The guide column type hanging plate fan-shaped section of a small cross-section slab billet continuous casting machine according to claim 1, characterized in that: The pressing mechanism (6) includes a driving roller pressing cylinder (61), a pressing cylinder pin (63), a bushing (64) and a spacer ring (65). A support seat (62) is provided below the driving roller pressing cylinder (61). The support seat (62) is fixedly connected to the upper frame (1) and the movable beam (3) by bolts.

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