Fixed end structure of roller type electromagnetic stirring device

Abstract

The utility model relates to the technical field of slab continuous casting electromagnetic stirring, in particular to a fixed end structure of a roller type electromagnetic stirring device. Comprising a roller type traveling wave generator, a composite protective sleeve, a fixed end bearing device and a fixed end cover group, the fixed end cover group is provided with a fixed end cover and an outer ball sleeve, the fixed end cover is provided with an inner spherical surface, the outer ball sleeve is provided with an outer spherical surface, and the outer spherical surface and the inner spherical surface are meshed to enable the outer ball sleeve to be embedded in the fixed end cover to form a ball joint and prevent the roller type traveling wave generator from axially moving to form a fixed end. The fixed ends of two roller type electromagnetic stirring traveling wave generating devices (with different lengths) with the roller type electromagnetic stirring device fixed end structures are coaxially attached and fixedly connected back to back to form the novel segmented roller type electromagnetic stirring traveling wave generating device.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnetic stirring for slab continuous casting, and in particular to a fixed end structure of a roller type electromagnetic stirring device. Background Art

[0002] In recent years, with the growing demand for high-quality wide and thick steel plates in China, roller-type electromagnetic stirring devices have been widely used as slab continuous casting process equipment because of their good metallurgical effects of improving slab core segregation and improving equiaxed crystals, and their use requires little modification to the continuous casting line and is easy to install. Due to the shortcomings of the roller-type electromagnetic stirring device, which is insufficient rigidity, it is not ideal for use on wide and thick slab continuous casting lines. There are two solutions in the prior art to solve its rigidity problem. One is to add supporting rollers in the middle, but due to the limited supporting contact area, that is, the wrap angle, it sometimes cannot meet the actual requirements for improving rigidity; the other is to use segmented electromagnetic stirring rollers in an installation method that imitates free rollers, but because the structure of the middle segmented part of the prior art is relatively large, a very wide weak magnetic field area is formed, which affects the metallurgical effect. The fixed end structure of a roller-type electromagnetic stirring device of the present invention solves the above-mentioned application problems well. Utility Model Content

[0003] In view of the above problems, the purpose of the present invention is to provide a fixed end structure of a roller electromagnetic stirring device, which expands the axial space of the coil winding of the traveling wave magnetic field generator and reduces the weak magnetic area of ​​the fixed end through a novel and compact fixed end structure. The fixed ends of two roller electromagnetic stirring traveling wave generating devices (the lengths can be different) with the technology of the present invention are coaxially fitted and fixedly connected back to back to form a new type of segmented roller electromagnetic stirring traveling wave generating device. The two fixed ends that are fixedly connected back to back constitute the middle support of the segmented roller electromagnetic stirring traveling wave generating device. The unique fixed end structure shortens the axial structure of the middle segmented part, effectively reduces the weak magnetic field area, and improves the metallurgical effect. The protective sleeve of the present invention tightly integrates the roller sleeve and the end shaft, effectively expands the winding space of the traveling wave generator, and sets the end shaft of the protective sleeve at the fixed end as the middle support of the segmented roller electromagnetic stirring traveling wave generating device, further shortening the axial weak magnetic field area of ​​the middle segmented part, which is more significant for improving the metallurgical effect.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] The present invention provides a fixed end structure of a roller electromagnetic stirring device, comprising: a roller traveling wave generator, a composite protective sleeve, a fixed end bearing device and a fixed end cover group; the fixed end cover group is provided with a fixed end cover and an outer ball sleeve, the fixed end cover is provided with an inner spherical surface, the outer ball sleeve is provided with an outer spherical surface, the outer spherical surface and the inner spherical surface are engaged with each other so that the outer ball sleeve is embedded in the fixed end cover to form a ball joint and prevent the roller traveling wave generator from axially moving to form a fixed end.

[0006] The central through hole of the fixed end cover is provided with an inner spherical surface, an inner hole and a keyway, and the outer ball sleeve is provided with an outer spherical surface, a second keyway, a cylindrical surface and a countersunk hole; the cylindrical surface is installed in the inner hole, and the outer spherical surface is engaged with the inner spherical surface so that the outer ball sleeve is embedded in the fixed end cover to form a ball joint within a limited range; the ball joint is tightly arranged at the central through hole of the fixed end cover.

[0007] The roller-type traveling wave generator is provided with: a coil winding and a lead wire group, a fixed end shaft head and a fixed end keyway. The fixed end shaft head is inserted into the countersunk hole of the outer ball sleeve, the notches of the fixed end keyway, the first keyway and the second keyway are aligned, and a positioning key is arranged in the notch, and the positioning key prevents the roller-type traveling wave generator from rotating around its axis and moving axially; the roller-type traveling wave generator can generate a traveling wave magnetic field by connecting an alternating power supply to the lead wire group.

[0008] The composite protective sleeve comprises: a roller sleeve, an end shaft, a fusion-welded connection ring and a bearing mounting surface; a stopper is arranged at the end of the roller sleeve, and a cylinder is arranged at the end shaft; the cylinder is inserted into the stopper of the roller sleeve so that the inner end part fits without gap to form a non-gap hole-shaft connection pair; a plurality of (at least one) saddle pins are arranged at the cylindrical fitting part of the non-gap hole-shaft connection pair, and the saddle pins block the relative sliding of the roller sleeve and the end shaft; the fusion-welded connection ring compositely welds the roller sleeve and the end shaft into one, and the composite protective sleeve is non-magnetic; the roller sleeve, the end shaft, the saddle pin and the fusion-welded connection ring are made of the same material.

[0009] The fixed-end bearing device comprises: a fixed-end bearing seat, a bearing and an end sleeve; the bearing mounting surface of the composite protective sleeve is inserted into the inner hole of the bearing, the end sleeve is fixed to the end of the composite protective sleeve and defines the axial position of the inner ring of the bearing with the bearing mounting surface, the outer ring of the bearing is inserted into the fixed-end bearing device, and a fixed-end end cover is provided at the end of the fixed-end bearing device, the fixed-end end cover is fixed to the end of the fixed-end bearing seat and defines the axial position of the outer ring of the bearing with the fixed-end bearing seat.

[0010] The fixed ends of two roller-type electromagnetic stirring traveling wave generating devices (the lengths may be different) having the fixed end structure of the roller-type electromagnetic stirring device are coaxially fitted and fixedly connected back to back to form a new type of segmented roller-type electromagnetic stirring traveling wave generating device. The two groups of fixed ends fitted and fixedly connected back to back constitute the middle support of the segmented roller-type electromagnetic stirring traveling wave generating device. Cooling water chambers and junction boxes are respectively arranged on the two outer ends of the segmented roller-type electromagnetic stirring traveling wave generating device, thereby forming a segmented roller-type electromagnetic stirring device for continuous casting of slabs.

[0011] Compared with the prior art, the advantages of the present invention are: the present invention effectively reduces the weak magnetic area of ​​the segmented area of ​​the segmented roller electromagnetic stirring device, expands the area where the traveling wave magnetic field occurs, improves the processing technology, can effectively ensure the processing accuracy, stable quality, low processing cost, short processing period, etc. It effectively solves the problems existing in the prior art.

[0012] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0013] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is a structural schematic diagram of the fixed end structure of the roller type electromagnetic stirring device according to an embodiment of the present invention;

[0016] Figure 2 is a schematic structural diagram of a protective cover in an embodiment of the present invention;

[0017] Figure 3 is a schematic structural diagram of a fixed-end bearing device in an embodiment of the present invention;

[0018] Figure 4 is a cross-sectional view of the fixed end cover assembly of the present invention;

[0019] Figure 5 is a cross-sectional view of the fixed end cover of the present invention;

[0020] Figure 6 The present invention Figure 5 Left view of;

[0021] Figure 7 It is a cross-sectional view of the outer ball sleeve of the present invention;

[0022] Figure 8 The present invention Figure 7 Right view of;

[0023] Fig. 9 Schematic diagram of the segmented roller electromagnetic stirring traveling wave generating device derived from the present invention.

[0024] In the figure: 1-roller traveling wave generating device, 2-composite protective sleeve, 21-roller sleeve, 22-end shaft, 23-fusion welding connection ring, 24-bearing mounting surface, 25-riding pin, 3-fixed end bearing device, 31-fixed end bearing seat, 32-bearing, 33-end sleeve, 4-fixed end end cover group, 41-fixed end end cover, 411-inner spherical surface, 412-inner hole, 413-keyway one, 42-outer ball sleeve, 421-outer spherical surface, 422-keyway two, 423-cylindrical surface, 424-countersunk hole. DETAILED DESCRIPTION

[0025] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the utility model, but the present invention is not limited to these embodiments.

[0026] The present invention is attached Figure 1 To Attachment Figure 8 It can be seen that:

[0027] The fixed end structure of the roller electromagnetic stirring device of the present invention comprises: a roller traveling wave generator 1, a composite protective sleeve 2, a fixed end bearing device 3 and a fixed end cover group 4; the fixed end cover group 4 is provided with a fixed end cover 41 and an outer ball sleeve 42, the fixed end cover 41 is provided with an inner spherical surface 411, and the outer ball sleeve 42 is provided with an outer spherical surface 421, the outer spherical surface 421 is engaged with the inner spherical surface 411 so that the outer ball sleeve 42 is embedded in the fixed end cover 41 to form a ball joint and prevent the roller traveling wave generator 1 from axially moving to form a fixed end.

[0028] The roller-type traveling wave generator 1 of the present invention is provided with a fixed end and a free end. The fixed end end cover group 4 is provided with a fixed end end cover 41 and an outer ball sleeve 42. The fixed end end cover 41 is provided with an inner spherical surface 411, and the outer ball sleeve 42 is provided with an outer spherical surface 421. The outer spherical surface 421 is engaged with the inner spherical surface 411 so that the outer ball sleeve 42 is embedded in the fixed end end cover 41 to form a ball joint within a limited range and prevent the roller-type traveling wave generator 1 from axially moving to form a fixed end; the free end is provided at the two outer end supports, and the free end allows the traveling wave generator to move toward this end appropriately to release the expansion and contraction change of the traveling wave generator caused by temperature change.

[0029] Furthermore, the fixed end cover 41 of the fixed end structure of the roller type electromagnetic stirring device of the present invention is provided with an inner spherical surface 411, an inner hole 412 and a keyway 413 at the central through hole, and the outer ball sleeve 42 is provided with an outer spherical surface 421, a keyway 422, a cylindrical surface 423 and a countersunk hole 424; the cylindrical surface 423 is installed in the inner hole 412, and the outer spherical surface 421 is engaged with the inner spherical surface 411 so that the outer ball sleeve 42 is embedded in the fixed end cover 41 to form a ball joint within a limited range; the ball joint is tightly arranged at the central through hole of the fixed end cover 41, shortening the axial space of the fixed end and reducing the weak magnetic area at the middle section of the fixed end structure of the roller type electromagnetic stirring device.

[0030] Furthermore, the roller-type traveling wave generator 1 of the present invention is provided with: a coil winding and a lead wire group, a fixed end shaft head and a fixed end keyway. The fixed end shaft head is inserted into the counterbore 424 of the outer ball sleeve 42, the notches of the fixed end keyway, the first keyway 413 and the second keyway 422 are aligned, and a positioning key is provided in the notch, and the positioning key prevents the roller-type traveling wave generator 1 from rotating around its axis and moving axially; the roller-type traveling wave generator 1 can generate a traveling wave magnetic field by connecting an alternating power supply to the lead wire group.

[0031] Furthermore, the composite protective sleeve 2 of the present invention comprises: a roller sleeve 21, an end shaft 22, a fusion-welded connecting ring 23 and a bearing mounting surface 24; a stopper is arranged at the end of the roller sleeve 21, and a cylinder is arranged at the end shaft 22; the cylinder is inserted into the stopper of the roller sleeve 21 so that the inner end is fitted without gap to form a non-gap hole-shaft connecting pair; a plurality of (at least 1) riding pins 25 are arranged at the cylindrical fitting position of the non-gap hole-shaft connecting pair, and the riding pins 25 block the relative sliding of the roller sleeve 21 and the end shaft 22; the fusion-welded connecting ring 23 compositely welds the roller sleeve 21 and the end shaft 22 into one, and the composite protective sleeve 2 is non-magnetic; the roller sleeve 21, the end shaft 22, the riding pins 25 and the fusion-welded connecting ring 23 are made of the same material.

[0032] Furthermore, the fixed-end bearing device 3 of the present invention comprises: a fixed-end bearing seat 31, a bearing 32 and an end sleeve 33; the bearing mounting surface 24 of the composite protective sleeve 2 is inserted into the inner hole of the bearing 32, the end sleeve 33 is fixed to the end of the composite protective sleeve 2 and defines the axial position of the inner ring of the bearing 32 with the bearing mounting surface 24, the outer ring of the bearing 32 is inserted into the fixed-end bearing device 3, and a fixed-end end cover 41 is provided at the end of the fixed-end bearing device 3, the fixed-end end cover 41 is fixed to the end of the fixed-end bearing seat 31 and defines the axial position of the outer ring of the bearing 32 with the fixed-end bearing seat 31.

[0033] Furthermore, the derivative of the present invention is as follows: the fixed ends of two roller type electromagnetic stirring traveling wave generating devices (the lengths may be different) having a roller type electromagnetic stirring device fixed end structure are coaxially fitted and fixedly connected back to back to form a new type of segmented roller type electromagnetic stirring traveling wave generating device; the two groups of fixed ends fitted and fixedly connected back to back constitute the middle support of the segmented roller type electromagnetic stirring traveling wave generating device; cooling water chambers and junction boxes are respectively arranged at the two outer ends of the segmented roller type electromagnetic stirring traveling wave generating device, thereby forming a segmented roller type electromagnetic stirring device for continuous casting of slabs.

[0034] The fixed end structure of the roller electromagnetic stirring device of the present invention expands the axial space of the coil winding of the traveling wave magnetic field generator and reduces the weak magnetic area of ​​the fixed end through the novel and compact fixed end structure. The fixed ends of two roller electromagnetic stirring traveling wave generating devices (of different lengths) with the technology of the present invention are fixedly connected back to back and coaxially to form a new type of segmented roller electromagnetic stirring traveling wave generating device (such as Fig. 9As shown in the figure), two groups of fixed ends that are fixedly connected back to back form the middle support of the segmented roller type electromagnetic stirring traveling wave generating device. The unique and novel structure of the present invention in which the ball joint is tightly arranged in the end cover of the fixed end shortens the axial space of the middle segmented part, effectively reduces the weak magnetic field area, and improves the metallurgical effect; the protective sleeve arranged in the present invention tightly integrates the roller sleeve and the end shaft, effectively expands the winding space of the traveling wave generator, and arranges the end shaft of the protective sleeve at the fixed end as the middle support position of the segmented roller type electromagnetic stirring traveling wave generating device, further shortening the axial weak magnetic field area of ​​the middle segmented part, which is more significant for improving the metallurgical effect.

[0035] Furthermore, cooling water chambers and junction boxes are respectively provided at both ends of the segmented roller electromagnetic stirring traveling wave generating device derived from the present invention, thereby forming a segmented roller electromagnetic stirring device for slab continuous casting.

[0036] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A roller type electromagnetic stirring device fixed end structure, characterized in that: include: A roller-type traveling wave generator (1), a composite protective sleeve (2), a fixed-end bearing device (3), and a fixed-end end cover group (4); the fixed-end end cover group (4) is provided with a fixed-end end cover (41) and an outer ball sleeve (42); the fixed-end end cover (41) is provided with an inner spherical surface (411); the outer ball sleeve (42) is provided with an outer spherical surface (421); the outer spherical surface (421) and the inner spherical surface (411) are engaged with each other so that the outer ball sleeve (42) is embedded in the fixed-end end cover (41) to form a ball joint and prevent the roller-type traveling wave generator (1) from axially moving to form a fixed end.

2. The fixed end structure of the roller type electromagnetic stirring device according to claim 1 is characterized in that: The fixed end cover (41) is provided with an inner spherical surface (411), an inner hole (412) and a keyway 1 (413) at the central through hole, and the outer ball sleeve (42) is provided with an outer spherical surface (421), a keyway 2 (422), a cylindrical surface (423) and a countersunk hole (424); the cylindrical surface (423) is installed in the inner hole (412), and the outer spherical surface (421) and the inner spherical surface (411) are engaged with each other so that the outer ball sleeve (42) is embedded in the fixed end cover (41) to form a ball joint within a limited range; the ball joint is tightly arranged at the central through hole of the fixed end cover (41).

3. The fixed end structure of the roller type electromagnetic stirring device according to claim 2, characterized in that: The roller-type traveling wave generator (1) is provided with: a coil winding and a lead wire group, a fixed end shaft head and a fixed end keyway; the fixed end shaft head is inserted into the countersunk hole (424) of the outer ball sleeve (42); the notches of the fixed end keyway, the first keyway (413) and the second keyway (422) are aligned; a positioning key is provided in the notch, and the positioning key prevents the roller-type traveling wave generator (1) from rotating around its axis and moving axially; the roller-type traveling wave generator (1) can generate a traveling wave magnetic field by connecting an alternating power supply to the lead wire group.

4. The fixed end structure of the roller type electromagnetic stirring device according to claim 1, characterized in that: The composite protective sleeve (2) comprises: a roller sleeve (21), an end shaft (22), a fusion welding connection ring (23) and a bearing mounting surface (24); a stopper is provided at the end of the roller sleeve (21); the end shaft (22) is provided with a cylinder; the cylinder is inserted into the stopper of the roller sleeve (21) so that the inner end is fitted without gap to form a non-gap hole-shaft connection pair; at least one saddle pin (25) is provided at the cylindrical fitting position of the non-gap hole-shaft connection pair; the saddle pin (25) blocks the relative sliding of the roller sleeve (21) and the end shaft (22); the fusion welding connection ring (23) compositely welds the roller sleeve (21) and the end shaft (22) into one body; the composite protective sleeve (2) is non-magnetic; the roller sleeve (21), the end shaft (22), the saddle pin (25) and the fusion welding connection ring (23) are made of the same material.

5. The fixed end structure of the roller type electromagnetic stirring device according to claim 1 or 4, characterized in that: The fixed-end bearing device (3) comprises: a fixed-end bearing seat (31), a bearing (32) and an end sleeve (33); the bearing mounting surface (24) of the composite protective sleeve (2) is inserted into the inner hole of the bearing (32); the end sleeve (33) is fixed to the end of the composite protective sleeve (2) and defines the axial position of the inner ring of the bearing (32) together with the bearing mounting surface (24); the outer ring of the bearing (32) is inserted into the fixed-end bearing device (3); a fixed-end end cover (41) is provided at the end of the fixed-end bearing device (3); the fixed-end end cover (41) is fixed to the end of the fixed-end bearing seat (31) and defines the axial position of the outer ring of the bearing (32) together with the fixed-end bearing seat (31).

6. The fixed end structure of the roller type electromagnetic stirring device according to claim 1, characterized in that: The fixed ends of two roller-type electromagnetic stirring traveling wave generating devices with equal or unequal lengths and having the fixed end structure of the roller-type electromagnetic stirring device are coaxially fitted and fixedly connected back to back to form a new type of segmented roller-type electromagnetic stirring traveling wave generating device. The two groups of fixed ends fitted and fixedly connected back to back constitute the middle support of the segmented roller-type electromagnetic stirring traveling wave generating device. Cooling water chambers and junction boxes are respectively arranged on the two outer ends of the segmented roller-type electromagnetic stirring traveling wave generating device, thereby forming a segmented roller-type electromagnetic stirring device for continuous casting of slabs.

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