Square billet fan-shaped section and continuous casting machine

Abstract

The utility model provides a square billet fan-shaped section and a continuous casting machine. The square billet fan-shaped section comprises a fan-shaped section frame and a plurality of rollers densely arranged on the fan-shaped section frame, the rollers are divided into a plurality of groups, each group comprises at least two rollers, the roller diameters of the rollers in each group are the same, the rollers in each group are mounted on a roller frame, the roller diameters of the rollers in different groups are different, and the rollers in different groups are mounted on the roller frame. The roller diameters in the groups closer to the crystallizers are smaller, and each roller frame is installed on the segment frame. According to the square billet fan-shaped section, the influence on the casting blank structure can be reduced, the casting blank quality can be improved, the square billet fan-shaped section can be used for large-section casting blank and small-section high-pulling-speed continuous casting production, the rigidity of the fan-shaped section can be improved, the installation, maintenance and replacement cost of rollers can be reduced, and the operation efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to steel metallurgical industry continuous casting technical field, in particular to a square billet fan -shaped section and continuous casting machine. BACKGROUND

[0002] Fan -shaped section is the important equipment on continuous casting and continuous casting continuous rolling production line, in the continuous casting process, liquid steel is first injected into crystallizer, then cooling, solidification forms casting blank, fan -shaped section is to adjust and control shape in the solidification process of casting blank through bending or vertical bending section, ensure that the internal structure of steel is uniform and has no defect.

[0003] Casting blank gradually cools along the fan -shaped section guide direction after flowing from crystallizer. Fan -shaped section mainly realizes the guidance of casting blank through densely arranged rollers. The roller diameter of the densely arranged rollers in the structure of most current fan -shaped sections is same, and there is a certain recess structure between adjacent rollers, which will have a certain influence on the structure of casting blank, especially when the casting blank shell is thin, the casting blank is easy to appear bulging, deformation and other influences when passing through the structure, especially in large section casting blank or high speed continuous casting production, the influence is greater.

[0004] In addition, the rollers in the structure of most current fan -shaped sections are directly installed on the fan -shaped section frame. In the use process, on the one hand, the fan -shaped section frame is easy to deform and affect the guidance of densely arranged rollers. When the fan -shaped section frame is severely deformed, the rollers are easy to be stuck, and scratches are easy to appear on the casting blank. On the other hand, the installation and replacement process of rollers is complicated. When a certain roller or several rollers need to be repaired and replaced, it may be necessary to disassemble and even repair its adjacent several or even multiple rollers, resulting in high operation cost of installation, repair and replacement, low efficiency, and thus affecting the production efficiency of continuous casting machine. UTILITY MODEL CONTENTS

[0005] In view of the above technical status, the utility model provides a square billet fan -shaped section, and the casting blank can reduce the influence on the structure of casting blank through the fan -shaped section, improve the quality of casting blank, can be used for large section casting blank and small section high speed continuous casting production, and can improve the rigidity of fan -shaped section, reduce the installation, repair and replacement cost of rollers and improve the operation efficiency.

[0006] The utility model provides a technical scheme: a square billet fan -shaped section, including fan -shaped section frame and the densely arranged several rollers on the fan -shaped section frame and form the guide of casting blank, its characterized in that: the roller is divided into M groups, M is equal to or greater than 2, and the i group roller is recorded as the i densely arranged roller, and 1 is less than or equal to i and is less than or equal to M;

[0007] There are at least two rollers in each group, the roller diameter of each roller in each group is same, and each roller in each group is installed on a roller frame;

[0008] The roller diameter of rollers in different groups is different, and the roller diameter in the group closer to the crystallizer is smaller.

[0009] Each roller frame is mounted on the segment frame;

[0010] Each close-packed roller forms a four-sided clamping or inner-outer arc double-sided clamping.

[0011] Preferably, the roller diameter of the i-th group is a small roller diameter of 60-130 mm; or, the roller diameter of the i-th group is a large roller diameter of 130-300 mm.

[0012] Preferably, the number of rollers in the i-th close-packed roller is 2-15.

[0013] Preferably, the close-packed rollers form clamping spaces with the same inner diameter.

[0014] Preferably, the rollers in each group are mounted on the roller frame through bearings. When the roller diameter is small, needle bearings or roller bearings are preferably used; when the roller diameter is large, roller bearings are preferably used.

[0015] Preferably, a sealing ring or the like structure is provided between the bearings and the rollers to prevent the entry of iron oxide scale, protective slag, etc. into the rollers.

[0016] As an implementation manner, the roller frame comprises a base and a bearing seat. The bearing seat is fixedly connected to the base, and the bearings are mounted on the bearing seat. Each roller is mounted on the bearing seat through the bearings.

[0017] The roller frame comprises a base, a first bearing seat, and a second bearing seat. The first bearing seat is fixedly connected to the base, and the second bearing seat is fixedly connected to the base. One end of the roller shaft passes through the first bearing seat, and the other end passes through the second bearing seat. The rollers are connected to the periphery of the roller shaft through the bearings.

[0018] Preferably, the segment is provided with a top plate at the end close to the crystallizer. Various positioning pins can be provided on the top plate, and the electromagnetic stirring coil of the crystallizer can be placed on the top plate through the positioning pins. The centering positioning pins of the crystallizer can be used for the preliminary arc centering of the crystallizer by the centering mechanism of the crystallizer, facilitating the replacement and arc centering of the crystallizer.

[0019] The end of the segment away from the crystallizer can be provided with an outer arc roller, left and right guide plates, inner arc limiting plates, heat preservation devices, etc.

[0020] The billet segment can be a straight rolling, endless rolling, semi-endless rolling process, vertical continuous casting machine, etc.

[0021] The installation method of the billet segment of the utility model is preferably that each roller in the close-packed roller is first mounted on the roller frame, and then the roller frame is mounted on the segment frame.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] (1) In the utility model, the close-packed rollers of the square billet fan-shaped section are divided into multiple groups, the diameters of the rollers in each group are the same, the diameters of the rollers in different groups are different, and the diameters of the rollers in each group gradually increase along the direction of the billet drawing, on the one hand, the diameters of the rollers of the group closer to the crystallizer are smaller, which is beneficial to the guiding of the cast billet with a thin shell by the small-diameter rollers, since the size of the recess structure between the adjacent rollers is small, the influence on the structure of the cast billet with a thin shell is effectively reduced, and the bulging and deformation of the cast billet are reduced, on the other hand, since multiple rollers (at least two, preferably 2-15) are arranged in each group, the structures of the rollers in each group are the same, when the cast billet is guided to the group, the cast billet can be stably guided for a period of time, compared with the fan-shaped section structure in which the diameters of the rollers of the adjacent groups are different, the stability of the change of the structure of the cast billet is improved, the defects such as bulging, off-square and cracks of the cast billet can be prevented, and the utility model is suitable for large-section cast billets or high-speed continuous casting production. 4 mm 2 -36×10 4 mm 2 , and the production drawing speed is preferably 0.1 m / min-2.0 m / min, more preferably 0.3 m / min-1.5 m / min. 4 mm 2 -4×10 4 mm 2 , and the production drawing speed is 4 m / min-14 m / min.

[0024] (2) In the utility model, the fan-shaped section frame is a whole structure, the close-packed rollers are all installed on the roller frames, and the roller frames are installed on the whole frame of the fan-shaped section, so that the rigidity of the fan-shaped section is effectively ensured, the fan-shaped section is not easy to deform after long-term use, and the roll gap between the close-packed rollers is effectively ensured;

[0025] (3) In the utility model, the close-packed rollers form clamping spaces, the inner diameters of the clamping spaces are the same, and the influence of the change of the inner diameters of the clamping spaces on the structure of the cast billet is avoided when the cast billet passes through the fan-shaped section;

[0026] (4) Compared with the single roller installation and dismounting in the prior art, the multiple rollers are integrally installed, dismounted and replaced in the utility model, so that the installation and dismounting process is simplified, and the installation and dismounting efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic view of the square billet fan-shaped section in the utility model embodiment.

[0028] Figure 2 is the A-A cross section schematic view of the square billet fan-shaped section in the embodiment of the utility model.

[0029] Figure 3 is the B-B cross section schematic view of the square billet fan-shaped section in the embodiment of the utility model.

[0030] Figure 4 is the second close-packed roller and the second stick frame schematic view in the embodiment of the utility model.

[0031] Figure 5 is the C-C cross section schematic view of the roller and bearing seat in the second close-packed roller in the embodiment of the utility model.

[0032] Figure 6 is the C-C cross section schematic view of the roller and eccentric shaft in the first close-packed roller in the embodiment of the utility model.

[0033] Figures 1-6 in the drawing mark is: 101-first close-packed roller;102-second close-packed roller;103-first roller frame;104-positioning pin;105-water receiving device;106-outer arc carrier roller;107-left and right side plates;108-inner arc limiting roller;110-electromagnetic stirring coil;113-second roller frame;114-fan-shaped section frame;

[0034] 501-roller in the first close-packed roller;502-eccentric shaft;503-bearing;504-retaining ring;

[0035] 610-frame;611-bearing seat;621-rotary joint;622-roller in the second close-packed roller;623-retaining ring;624-isolation ring;625-stop ring;631-sealing ring;632-bearing;641-retaining ring. DETAILED DESCRIPTION

[0036] The utility model is further described in detail below in combination with the embodiments and drawings, and it should be pointed out that the following described embodiments are intended to facilitate the understanding of the utility model and do not have any limiting effect on it.

[0037] The embodiments of the utility model are further described below in combination with the drawings, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model and cannot be understood as limiting the utility model, and any modification, equivalent replacement or improvement made within the spirit and principle of the utility model should be included in the scope of claims of the utility model, and the not specifically described in the technical scheme of the utility model is the known technology.

[0038] AsFigure 1 As shown in the figure, the bloom sector includes a sector frame 114 and a plurality of rollers, which are divided into two groups, one group has 7 rollers with the same diameter, marked as the first dense row of rollers, the other group has 5 rollers with the same diameter, marked as the second dense row of rollers. The diameters of the rollers in the first dense row are different from those in the second dense row. According to the actual needs of the cast bloom, the diameters of the rollers in the first dense row are 60mm-130mm, for example, they can be 80mm-120mm, and the diameters of the rollers in the second dense row are 130mm-300mm, for example, they can be 140mm-220mm.

[0039] The rollers in the first dense row are all installed on the first roller frame 103. The rollers in the second dense row are all installed on the second roller frame 113. The first roller frame 103 and the second roller frame 113 are installed on the sector frame 114.

[0040] In this embodiment, as shown in Figure 2 , 3 , the bloom sector is provided with a four-sided clamping structure, and in some embodiments, it can also be provided with an inner-outer arc double-sided clamping structure. The first roller frame 103 is connected to the sector frame 114 by bolts. The second roller frame 113 is connected to the sector frame 114 by bolts, as shown in Figure 1 , a clamping space is formed along the guide of the cast bloom, and the inner diameters of the clamping spaces are the same.

[0041] As shown in Figure 4 , the second roller frame 113 includes a base 610 and a bearing seat 611. The bearing seat 611 is fixedly connected to the base 610, and the bearing 632 is installed on the bearing seat 611. Each roller 622 is installed on the bearing seat through the bearing 632.

[0042] Figure 5 is Figure 4 the C-C cross section (i.e. the longitudinal cross section) of the roller and the bearing seat. Each roller 622 in the second dense row of rollers is installed on the second roller frame 113 through the bearing seat 611, and the dense row of rollers is cooled by the rotary joint 621. A retaining ring 641 is provided between the rotary joint 621 and the roller 622. A bearing 632 is provided between each roller 622 in the second dense row of rollers and the bearing seat 611, which can be a needle bearing, a cylindrical roller bearing, or a self-aligning roller bearing, preferably a self-aligning roller bearing. A retaining ring 623 is provided between the bearing 632 and the bearing seat 611, and a spacer ring 624 is additionally provided between the outside of the retaining ring 623, the bearing seat 611 and the roller 622. Preferably, it is a stacked ring. Through the above measures, the entry of iron oxide scale, protective slag, etc. into the roller is prevented, and the rollers of the second dense row of rollers are prevented from being stuck, and scratches on the cast bloom are prevented.

[0043] Similarly, the first roller frame 103 is similar in structure to the second roller frame 113, comprising a base and a bearing seat. The bearing seat is fixedly connected to the base, and bearings are installed on the bearing seat, and each roller is installed on the bearing seat through the bearings.

[0044] Figure 6 is a C-C section of the roller 501 and the eccentric shaft 502 in the first closely-spaced roller 101. Each roller 501 in the first closely-spaced roller 101 is installed on the bearing seat through the eccentric shaft 502. Bearings 503 are arranged between the eccentric shaft 502 and the roller 501, and the bearings 503 can be needle bearings, roller bearings or self-lubricating bearings, and are preferably needle bearings. A retaining ring 504 is arranged outside the bearings.

[0045] The first closely-spaced roller 101 and the second closely-spaced roller 102 are both installed on the roller frame 114, which effectively ensures that the overall frame of the sector segment is not deformed, and the roller gap between the closely-spaced rollers is effectively ensured.

[0046] The area where no closely-spaced roller is arranged in the sector segment can be arranged, for example, the area where no closely-spaced roller is arranged in the embodiment is arranged with an outer arc idler roller 106, left and right side plates 107 and an inner arc limiting roller 108.

[0047] In the embodiment, the end of the sector segment close to the crystallizer is provided with a top plate, and various positioning pins 104 can be arranged on the top plate, which are used for placing an electromagnetic stirring coil 110 of the crystallizer.

[0048] In the embodiment, the end of the sector segment away from the crystallizer is provided with a water receiving device 105, and a body pipe of the square billet sector segment is connected to a workshop pipe through the water receiving device 105. Two cooling waters, two cooling gases and equipment cooling waters are connected to a two cooling spray header through the body pipe and a sector segment frame cooling pipe. After the sector segment is installed in place, the cooling waters, gases and equipment cooling waters are automatically connected, and the operation time for replacing the sector segment is reduced.

[0049] According to the situation of the sector segment, the sector segment base is adaptively arranged, and an interface connected to the water receiving device of the sector segment is arranged on the base. After the sector segment is installed in place, the two cooling waters, the two cooling gases and the equipment cooling water pipelines are automatically connected. The replacement time of the cross section is saved.

[0050] In the description of the utility model, it should be understood that the positions or position relations of the terms "inner arc", "outer arc", "inner and outer arcs", "left and right sides" and the like are based on the positions or position relations shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated devices or elements must have a specific position, a specific position and operation, and therefore cannot be understood as a limitation on the utility model.

[0051] The technical scheme of the utility model is described in detail in the above embodiment, and it should be understood that the above description is only a specific embodiment of the utility model and is not used to limit the utility model, and any modification, supplement or similar replacement made within the principle range of the utility model should be included in the protection range of the utility model.

Claims

1. A square billet sector, comprising a sector frame and a plurality of rollers densely arranged on the sector frame to guide the billet casting, characterized in that: The rollers are divided into M groups, M≥2, and the i-th group of rollers is denoted as the i-th closely packed roller, 1≤i≤M; Each group has at least two rollers, all rollers in each group have the same diameter, and each roller in each group is mounted on a roller frame. The roller diameters differ in different groups; the roller diameters are smaller in groups closer to the crystallizer. Each roller frame is mounted on the fan-shaped section frame; the closely spaced rollers form a four-sided clamping or an inner and outer arc double-sided clamping.

2. The square billet sector segment as described in claim 1, characterized in that: The roller diameter of the i-th group is a small roller diameter, which is 60mm-130mm; or the roller diameter of the i-th group is a large roller diameter, which is 130mm-300mm.

3. The square billet sector segment as described in claim 1, characterized in that: The number of rollers in the i-th densely packed rollers is 2 to 15.

4. The square billet sector segment as described in claim 1, characterized in that: The rollers in each group are mounted on the roller frame via bearings.

5. The square billet sector segment as described in claim 4, characterized in that: Needle roller bearings or roller bearings are used when the roller diameter is small, and roller bearings are used when the roller diameter is large.

6. The square billet sector segment as described in claim 4, characterized in that: A sealing structure is provided between the bearing and the roller.

7. The square billet sector segment as described in claim 4, characterized in that: The roller frame includes a base and a bearing seat, the bearing seat is fixedly connected to the base, and the bearing is mounted on the bearing seat.

8. A continuous casting machine, characterized in that: Includes the square billet sector segment as described in any one of claims 1 to 7.

9. The continuous casting machine as described in claim 8, characterized in that: The cross-sectional area of ​​the billet is 4×10. 4 mm 2 -36×10 4 mm 2 .

10. The continuous casting machine as described in claim 8, characterized in that: The cross-sectional area of ​​the billet is 1×10. 4 mm 2 -4×10 4 mm 2 .

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