CN209902215U

CN209902215U - Roller box for thin slab continuous casting fan-shaped section

Info

Publication number: CN209902215U
Application number: CN201920621418.2U
Authority: CN
Inventors: 潘小勇; 董春光; 姜渭
Original assignee: Changzhou Baoling Heavy and Industrial Machinery Co Ltd
Current assignee: Changzhou Baoling Heavy and Industrial Machinery Co Ltd
Priority date: 2019-05-05
Filing date: 2019-05-05
Publication date: 2020-01-07
Anticipated expiration: 2029-05-05

Abstract

The utility model discloses a roll box for continuous casting fan-shaped sections of sheet billets, which comprises a main board and a plurality of side boards, wherein after each side board is connected with the main board, a containing cavity is formed between the side board and the main board, the main board is provided with a plurality of first water inlet holes which extend along the transverse direction of the roll frame, the main board is also provided with a plurality of first water outlet holes, and after the first water outlet holes are arranged in a line along the transverse direction of the main board, the first water outlet holes are communicated with the first water inlet holes; each first water outlet hole is connected with one end of one first water spraying assembly; the first guide rollers are transversely arranged along the main board and are arranged in a plurality of rows, a first assembly space is reserved between every two adjacent rows of the first guide rollers, and the other end of the first water spraying assembly is positioned in the first assembly space; the electromagnetic stirrer is arranged in the accommodating cavity. The utility model has the advantages of improve the quality of the thin slab and compact structure.

Description

Roller box for thin slab continuous casting fan-shaped section

Technical Field

The utility model relates to a sheet bar continuous casting is roller box for fan-shaped section.

Background

The mainstream market structure of the entrance of the No. 1 fan-shaped section of the thin slab continuous casting machine is a cast iron grating which is used for clamping and guiding the thin slab and is widely applied to the production of conventional products. But the defects are obvious when the high-quality silicon steel is produced, and the defects are mainly shown in that the reworkable performance is influenced by the surface scratch of the product and the over-high columnar crystal rate of the microstructure.

Partial steel mills are also partially reformed, the grid structure is reformed into a conventional roller box structure, each group of roller box consists of 3 groups of rollers and one set of roller frame, the surface scratch is improved to some extent, but the product has large drum, steel leakage is easy to occur, the microstructure cannot be improved, and the further production of silicon steel products is limited.

Disclosure of Invention

An object of the utility model is to provide an improve sheet bar quality and compact structure's roller box for sheet bar continuous casting fan-shaped section.

The technical scheme for solving the technical problems is as follows:

a roll cassette for continuous casting of thin slabs in a sector, comprising:

the roller frame is provided with a containing cavity, the roller frame comprises a main plate and a plurality of side plates, the containing cavity is formed between the side plates and the main plate after each side plate is connected with the main plate, the main plate is provided with a plurality of first water inlet holes which extend along the transverse direction of the roller frame, the main plate is also provided with a plurality of first water outlet holes, and after the first water outlet holes are arranged in a row along the transverse direction of the main plate, the first water outlet holes are communicated with the first water inlet holes;

each first water outlet hole is connected with one end of one first water spraying assembly;

the first guide rollers are arranged in a plurality of rows along the transverse direction of the main board, a first assembly space is reserved between every two adjacent rows of the first guide rollers, and the other end of the first water spray assembly is positioned in the first assembly space;

and the electromagnetic stirrer is used for strengthening molten steel movement in the liquid cavity of the thin plate liquid core casting blank by electromagnetic force and is arranged in the accommodating cavity.

The utility model discloses in all fusing into the mainboard on the roller frame with spray cooling line, roller support isotructure requirement, compact structure leaves box electromagnetic stirrer installation space, satisfies agitator to the casting blank surface requirement closely. The small-size non-magnetic spring bearing is used, the non-magnetic rollers with small sections and small diameters are densely arranged, and the rollers are supported by multiple points to ensure small deflection deformation, and is the first time in China. Because the span between the rollers is reduced, the bulging amount of the casting blank can be obviously reduced, thereby reducing the fluctuation of the liquid level of the crystallizer and reducing the risks of slag entrapment and bulging steel leakage. The novel design of three water route regions on the nonmagnetic main board on the roller frame realizes that the steel mill products need to adjust the requirement of spraying width and cooling strength due to the change of width specifications.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a schematic perspective view of the present invention viewed from another direction;

fig. 3 is a schematic sectional structure of the present invention;

fig. 4 is a schematic view of a roller frame according to the present invention;

FIG. 5 is a schematic sectional view of the roller frame according to the present invention;

fig. 6 is a schematic sectional view of the first guide roller according to the present invention;

fig. 7 is a schematic sectional view of a second guide roller according to the present invention;

the bearing comprises a main plate 1, a side plate 2, a containing cavity 3, a first water inlet hole 4, a first water outlet hole 5, a first water spraying assembly 6, a first mandrel 7, a first roller 8, a first spacer bush 9, a first bearing seat 10, a first bearing 11, a first wear-resistant ring 12, an electromagnetic stirrer 13, a main water pipe 14, a water diversion pipe 15, a second nozzle 16, a support seat 17, a third water inlet hole 18, a third water outlet hole 19, a third water spraying assembly 20, a second mandrel 21, a second roller 22, a second spacer bush 23, a second bearing seat 24, a second bearing 25 and a second wear-resistant ring 26.

Detailed Description

As shown in fig. 1 and 2, the roll cassette for a segment of a continuous thin slab casting according to the present invention comprises: the roller frame, the first water spray assemblies, the guide rollers and the electromagnetic stirrer are described in detail below:

as shown in fig. 1 to 3, the roller frame has a containing cavity 3, the roller frame includes a main board 1 and a plurality of side boards 2, after each side board 2 is connected with the main board 1, the containing cavity 3 is formed between the side board 2 and the main board 1, the main board 1 is provided with a plurality of first water inlets 4 extending along the transverse direction of the roller frame, the main board is further provided with a plurality of first water outlets 5, and after the first water outlets 5 are arranged in a row along the transverse direction of the main board 1, the first water outlets 5 are communicated with the first water inlets 4. The main board 1 is made of nonmagnetic materials.

As shown in fig. 1 to 5, each first water outlet 5 is connected to one end of a first water spraying assembly 6, the first water spraying assembly 6 includes first nozzles, and after the first water spraying assemblies 6 are connected to the first water outlets 5, a first spraying area is formed to spray and cool the thin plate liquid core casting blank passing through the roll box.

As shown in fig. 1 to 5, the first guide rollers are arranged in a plurality of rows along the transverse direction of the main plate, a first assembly space is left between two adjacent rows of the first guide rollers, and the other end of the first water spray assembly 6 is positioned in the first assembly space; the thin slab is guided by the first guide roller while moving. The first guide roll comprises a first mandrel 7, a plurality of first rolls 8, a plurality of first spacers 9, a plurality of first bearing seats 10 and a plurality of first bearings 11, the first bearing seats 10 are fixedly connected with the main board 1, the first mandrel 7 is fixedly connected with the first bearing seats 11, the first mandrel 7 is connected with the first bearings 11, the first spacers 9 are installed on the first mandrel 7, two ends of the first spacers 9 are respectively abutted to the first bearings 11, and two ends of the first rolls 8 are respectively connected with the first bearings 10. The first bearing 10 is preferably a spring bearing.

As shown in fig. 1 to 6, steps are respectively disposed in inner holes at two ends of the first roller 8, a first wear-resistant ring 12 is further clearance-fitted on the first mandrel 7, the first wear-resistant ring 12 is located between the first bearing seat 10 and the first bearing 11, a certain clearance is maintained between the first wear-resistant ring 12 and the first bearing 11 to facilitate thermal expansion and contraction of the first roller 8, and an R ring is installed in an annular groove on an outer circumferential surface of the first wear-resistant ring 12 to prevent foreign matters from entering the groove to protect the bearing.

As shown in fig. 1 to 6, the first mandrel 7, the first roller 8, the first spacer 9, the first bearing seat 10, and the first bearing 11 are made of nonmagnetic material. The combination of the first mandrel 7 and the plurality of segmented first rollers 8 ensures the sheet bar transverse crown tolerance by controlling the deflection of the guided first guide rollers. The overall rigidity of the first guide roll is ensured by the first roll 8 and the roll stand. This small-sized non-magnetic, segmented first roll 8 is the first use in the continuous casting industry. In order to control deflection, conventional continuous casting non-magnetic rolls are usually large diameter monolithic rolls with bearings placed at both ends of the roll outside the magnetic lines. The continuous casting of the sheet billet can only adopt a guide supporting roller with small span and small diameter because of high billet drawing speed, thin liquid core slab shell and easy bulging deformation to cause steel leakage. Compared with the prior art, the distance between the electromagnetic stirrer and the surface of the thin slab is smaller in the structure, so that the stirring effect can be improved, and the power consumption can be reduced.

As shown in fig. 1 to 3, the electromagnetic stirrer 13 strengthens the molten steel movement in the liquid cavity of the thin slab by electromagnetic force, and the electromagnetic stirrer 13 is installed in the accommodating chamber 3. The essence of the electromagnetic stirrer 13 is that the electromagnetic force induced in the liquid cavity of the sheet bar is used to strengthen the movement of the molten steel in the liquid cavity, thereby strengthening the convection, heat transfer and mass transfer processes of the molten steel, controlling the solidification process of the sheet bar and having positive effect on improving the quality of the sheet bar.

The electromagnetic stirrer may adopt: a tundish heating electromagnetic stirrer (HEMS) and a crystallizer electromagnetic stirrer (MEMS); a secondary cold stage electromagnetic stirrer (SEMS); any one of solidification end magnetic stirrers (FEMS). This novel roller box preferentially adopts two cold section electromagnetic stirrers, just in the strong region of growing of column crystalline substance, make the column crystalline substance of earlier stage growth broken through stirring the molten steel, mix together with the molten steel, will become the isometric brilliant core of later stage solidification afterwards, the stirring will promote the liquid steel that does not solidify to flow simultaneously, strengthen the convection current effect, improve the alternate heat-conduction of solid-liquid, be favorable to eliminating residual superheat degree, alleviate the temperature gradient of solidifying the forward position, restrain the directional growth of crystal, thereby be favorable to the growth of isometric brilliant, the electromagnetic stirrers of the two cold sections of slab continuous casting can improve the solidification structure, enlarge the isometric crystalline substance region in thin slab center, alleviate center segregation and loose center.

As shown in fig. 1 to 3, the roller box further includes a second water spray assembly, one end of which is installed on the upper portion of the side plate, and the other end of which is located at one side of the first guide roller after the second water spray assembly extends along the side plate. The second water spraying assembly comprises a main water pipe 14, a water distribution pipe 15, a second nozzle 16 and a support 17, the support 17 is fixedly connected with the side plate 2, the main water pipe 14 is supported on the support 17, one end of the water distribution pipe 15 is connected with the main water pipe 14, and the other end of the water distribution pipe is connected with the second nozzle 16. The water entering the main water pipe 14 is conveyed to the second nozzle 16 through the water distribution pipe 15 and is sprayed out of the second nozzle 16, so that a second cooling area is formed, and high-strength spray cooling is provided for the liquid core casting blank which just exits from the crystallizer and is about to enter the fan-shaped section.

As shown in fig. 1 to 5, a plurality of third water inlet holes 18 extending transversely along the roller frame are formed in the main plate 1, a plurality of third water outlet holes 19 are further formed in the main plate 1, and after the third water outlet holes 19 are arranged in a row transversely along the main plate 2, the third water outlet holes 19 are communicated with the third water inlet holes 18. The roller box also comprises a third water spray assembly 20 and a plurality of second guide rollers, and each third water outlet hole 19 is connected with one end of one third water spray assembly 20; the second guide rollers are arranged in parallel in a plurality of rows in the transverse direction of the main plate 1, a second assembly space is left between two adjacent rows of the second guide rollers, and the other end of the third water spray assembly 20 is positioned in the second assembly space. A third spray zone is formed by the third water spray assembly 20 to spray-cool the thin slab passing through the roll box.

As shown in fig. 1 to 7, the second guide roller includes a second mandrel 21, a plurality of second rollers 22, a plurality of second spacers 23, a plurality of second bearing seats 24, and a plurality of second bearings 25, the second bearing seats 24 are fixedly connected to the main board 1, the second mandrel 21 is fixedly connected to the second bearing seats 24, the second mandrel 21 is connected to the second bearings 25, the second spacers 23 are mounted on the second mandrel 21, two ends of the second spacers 23 respectively abut against the second bearings 25, and two ends of the second rollers 22 are respectively connected to the second bearings 25. The second bearing 25 is preferably a spring bearing.

As shown in fig. 1 to 7, steps are respectively provided in inner holes at two ends of the second roller 22, a second wear-resistant ring 26 is further clearance-fitted on the second mandrel 21, the second wear-resistant ring 26 is located between the second bearing seat 24 and the second bearing 25, a clearance is maintained between the second wear-resistant ring 26 and the second bearing 25 to facilitate thermal expansion and contraction of the second roller 22, and an R ring is installed in an annular groove on an outer cylindrical surface of the second wear-resistant ring 26 to prevent foreign matters from entering, so as to protect the second bearing 25.

As shown in fig. 1 to 7, the second mandrel 21, the second roller 22, the second spacer 23, the second bearing seat 24, and the second bearing 25 are made of nonmagnetic material. The combination of the second mandrel 21 and the plurality of segmented second rollers 22 ensures the transverse crown tolerance of the thin slab by controlling the deflection of the guided second guide rollers 22. The overall rigidity of the second guide roller is ensured by the second roller 22 and the roller frame. This small size nonmagnetic segmented second roll 22 is the first use in the continuous casting industry. In order to control deflection, conventional continuous casting non-magnetic rolls are usually large diameter monolithic rolls with bearings placed at both ends of the roll outside the magnetic lines. The continuous casting of the sheet billet can only adopt a guide supporting roller with small span and small diameter because of high billet drawing speed, thin liquid core slab shell and easy bulging deformation to cause steel leakage. Compared with the prior art, the distance between the electromagnetic stirrer and the surface of the thin slab is smaller in the structure, so that the stirring effect can be improved, and the power consumption can be reduced.

As shown in fig. 1 to 7, the utility model discloses main pair roller frame has carried out innovative design, fuses into roller frame positive stainless steel in no magnetism mainboard 1 with former refrigerated shower, promptly: form first inlet opening 4 through boring the deep hole, install first apopore 5 on first inlet opening 4, and load on first apopore 5 first water spray assembly 6, through forming third inlet opening 18 at boring deep hole mainboard 1, install third apopore 19 on third inlet opening 18, and load on third water spray assembly 20 on third apopore 19, form and spray the cooling pipeline, with the cooperation of second nozzle 16, improve the cooling strength to the sheet billet, also cool off the roller simultaneously. The back of the roller frame is provided with an electromagnetic stirrer 13, and the minimum distance between the electromagnetic stirrer 13 and the surface of the casting blank is ensured. The nonmagnetic first roller and the nonmagnetic second roller adopt segmented rollers with the diameter of phi 95, seven groups of rollers are arranged in a close manner, the first bearing seat 10 and the second bearing seat 11 are arranged on the nonmagnetic main board 1 of the roller frame, and the total deflection is ensured by the rigidity of the roller frame.

Claims

1. A roll box for a continuous casting sector section of a sheet bar is characterized by comprising:

2. The roll cassette for a segment of thin slab casting according to claim 1, further comprising a second water spray assembly having one end installed at an upper portion of the side plate, and the other end of the second water spray assembly being located at one side of the first guide roll after the second water spray assembly extends along the side plate.

3. The roll cassette for the continuous casting of thin slabs into segments as set forth in claim 1, wherein the main plate is provided with a plurality of third water inlet holes extending in a transverse direction of the roll frame, and a plurality of third water outlet holes arranged in a row in the transverse direction of the main plate and communicating with the third water inlet holes;

further comprising: each third water outlet hole is connected with one end of one third water spraying assembly;

and the second guide rollers are arranged in parallel in a plurality of rows along the transverse direction of the main plate, a second assembly space is reserved between every two adjacent rows of the second guide rollers, and the other end of the third water spray assembly is positioned in the second assembly space.

4. The roll cassette for the continuous casting of fan-shaped segments of thin slabs as claimed in claim 1, wherein the first guide roll comprises a first mandrel, a plurality of first rolls, a plurality of first spacers, a plurality of first bearing seats, and a plurality of first bearings, the first bearing seats are fixedly connected to the main plate, the first mandrel is fixedly connected to the first bearing seats, the first mandrel is connected to the first bearings, the first spacers are mounted on the first mandrel, both ends of the first spacers are respectively abutted against the first bearings, and both ends of the first rolls are respectively connected to the first bearings.

5. The roll cassette for the continuous casting of thin slabs onto the fan-shaped section as claimed in claim 3, wherein the second guide roll comprises a second mandrel, a plurality of second rolls, a plurality of second spacers, a plurality of second bearing blocks, and a plurality of second bearings, the second bearing blocks are fixedly connected with the main plate, the second mandrel is fixedly connected with the second bearing blocks, the second mandrel is connected with the second bearings, the second spacers are mounted on the second mandrel, two ends of the second spacers abut against the second bearings, and two ends of the second rolls are connected with the second bearings.

6. The roll cassette for a segment of a continuous thinslab casting according to any one of claims 1 to 5, wherein the main plate and the first guide roll are made of a nonmagnetic material.