Multi-pole segmented electromagnetic roller, electromagnetic stirring device, system and method

Abstract

The present invention discloses a multi-pole segmented electromagnetic roller, an electromagnetic stirring device, a system and a method. The multi-pole segmented electromagnetic roller includes an electromagnetic stirring roller, a first bearing seat and a second bearing seat, a first water inlet and outlet cylinder and a second water inlet and outlet cylinder, a first water inlet and outlet chamber and a second water inlet and outlet chamber, a first outlet box and a second outlet box, a first lead wire assembly and a second lead wire assembly, and a first cable connection assembly and a second cable connection assembly; the electromagnetic stirring roller adopts a segmented structure, which can reduce the deformation of the shaft sleeve while increasing the inner diameter of the roller sleeve and the winding space, thereby improving the rigidity; at the same time, the excitation inductor includes multiple pairs of excitation coils, which increases the number of N-S pole closed magnetic circuits, makes the alternating magnetic field distribution more uniform, and increases the electromagnetic thrust; adopts automatic water inlets and outlets, water inlet and outlet chambers, and linear cable connectors, thereby solving the problem that the installation space of the sector segment is small and it is impossible to install a seated cable connector and an inlet and outlet pipe.

Description

Technical Field

[0001] The present invention belongs to the electromagnetic stirring technology of the secondary cooling zone of continuous casting, and in particular relates to a multi-pole segmented electromagnetic roller, an electromagnetic stirring device, a roller-type electromagnetic stirring system for slab continuous casting and rolling, and a control method. Background Art

[0002] In the late 1990s, my country introduced its first CSP (Compact Strip Production) thin slab continuous casting and rolling line, and the technology subsequently developed rapidly. Initially designed for the production of standard steel grades, CSP thin slab continuous casting and rolling lines primarily produced standard medium-strength low-carbon hot strip steel. With technological advancements, the product range has expanded to higher-end products, and now enables the mass production of carbon structural steel, low-alloy high-strength steel, medium- and high-carbon steel, automotive structural steel, weathering steel, pipeline steel, cold-rolled base material, and electrical steel. As the steel industry maintains capacity control, increasing continuous casting speeds is key to reducing costs and achieving economical production. Improving quality and increasing production are the core competitiveness of steel mills.

[0003] CSP continuous casting boasts high casting speeds, reaching up to 4.7 m / min. The high solidification rate of thin slabs results in extremely developed columnar grains, making it impossible for medium- and high-grade silicon steel to completely replace conventional continuous casting. This development of columnar grains hinders subsequent rolling and is the primary cause of corrugated surface defects in finished products.

[0004] At present, the main methods to solve the corrugated defect are to adjust the molten steel composition and use electromagnetic stirring to increase the equiaxed grain ratio of the ingot, and to normalize the hot rolled plate. However, these solutions are costly and ineffective. In addition, the free rollers of the CSP continuous casting and rolling mill are closely packed, with small diameters and compact space. Traditional single-pole integral electromagnetic rollers are usually configured on this type of sector. Figure 1As shown, the conventional single-pole integral electromagnetic roller includes an electromagnetic stirring roller 5, and both ends of the electromagnetic stirring roller 5 have the same structure, wherein the structure at one end includes a first cable connection component 1, a first outlet box 2, a first water inlet and outlet cylinder 3 and a first bearing seat 4, and the electromagnetic stirring roller 5 includes an excitation sensor 51 and a roller sleeve 52; the first cable connection component 1 adopts a sitting cable connector, and one end of the electromagnetic stirring roller 5 is connected to the electrical control system through the sitting cable connector, and the electrical control system provides alternating current, so that the electromagnetic stirring roller 5 is powered on and works; a lead wire assembly is provided in the first outlet box 2, so that the excitation sensor The inductor 51 is connected to the cable connection assembly 1; the universal water inlet and outlet pipes are directly provided on the first water inlet and outlet cylinder 3, and water is passed through the first water inlet and outlet cylinder 3 to cool the excitation inductor 51; the first bearing seat 4 is provided with a bearing to support the excitation inductor 51 and the roller sleeve 52; the excitation inductor 51 is provided in the roller sleeve 52, generating an NS pole closed magnetic circuit to stir the continuous casting billet; the roller sleeve 52 is made of a non-magnetic high-temperature alloy to protect the excitation inductor 51, and the magnetic circuit can penetrate the roller sleeve 52 to act on the continuous casting billet. The roller sleeve 52 is filled with cooling water to cool the excitation inductor 51. This traditional electromagnetic stirring roller has a small electromagnetic thrust due to the limitation of the winding space. At the same time, the space of the second cooling zone sector is small. It adopts a seated cable connector and inlet and outlet pipes. Due to the lack of space for plugging and unplugging, it cannot be installed or is difficult to install on the CSP thin slab continuous casting and rolling sector.

[0005] Therefore, box-type electromagnetic stirring is mainly used in the fan-shaped section, but this form has insufficient stirring area and stirring force, consumes a lot of electricity, and easily causes liquid level fluctuations.

[0006] Definition: Single-pole means that the excitation coil produces an NS pole closed magnetic circuit; integral means that the roller sleeve is not divided and is a one-way roller. Summary of the Invention

[0007] The purpose of the present invention is to provide a multi-pole segmented electromagnetic roller, an electromagnetic stirring device, a system and a method to solve the problems in the traditional technology of configuring a single-pole integral electromagnetic roller in the sector section of a CSP continuous casting and rolling mill, which has small electromagnetic thrust and difficult installation, and the problem of using a box-type electromagnetic stirring method, which has insufficient stirring action area and stirring force, large power consumption, and easily causes liquid level fluctuations.

[0008] The present invention solves the above technical problems through the following technical solutions: a multi-pole segmented electromagnetic roller is provided in the secondary cooling zone sector of a slab continuous casting and rolling mill, and the electromagnetic roller comprises:

[0009] An electromagnetic stirring roller, comprising a segmented roller 1, a segmented roller 2, and an intermediate piece for connecting the segmented roller 1 and the segmented roller 2, wherein the segmented roller 1 and the segmented roller 2 each comprise a roller sleeve and an excitation sensor disposed within the roller sleeve, a gap being provided between the roller sleeve and the excitation sensor, and the excitation sensor comprising a plurality of pairs of excitation coils;

[0010] a first bearing seat and a second bearing seat, wherein the first bearing seat is provided on the first segmented roller, and the second bearing seat is provided on the second segmented roller, and both the first bearing seat and the second bearing seat are provided with automatic water inlets and outlets adapted to the water inlets and outlets of the cooling water device on the sector;

[0011] a first water inlet and outlet cylinder and a second water inlet and outlet cylinder, wherein the first water inlet and outlet cylinder is provided on the first bearing seat and communicated with the gap of the first segmented roller, and the second water inlet and outlet cylinder is provided on the second bearing seat and communicated with the gap of the second segmented roller;

[0012] A first water inlet and outlet chamber and a second water inlet and outlet chamber, wherein the first water inlet and outlet chamber is fixedly mounted on the first water inlet and outlet cylinder and is in communication with the corresponding automatic water inlet and outlet and the first water inlet and outlet cylinder; the second water inlet and outlet chamber is fixedly mounted on the second water inlet and outlet cylinder and is in communication with the corresponding automatic water inlet and outlet and the second water inlet and outlet cylinder;

[0013] a first outlet box and a second outlet box, wherein the first outlet box is connected to the first water inlet and outlet cylinder, and the second outlet box is connected to the second water inlet and outlet cylinder;

[0014] A first lead-out line assembly and a second lead-out line assembly, wherein the first lead-out line assembly is located in the first outlet box and the first water inlet and outlet cylinder, and the second lead-out line assembly is located in the second outlet box and the second water inlet and outlet cylinder;

[0015] One end of the first cable connection assembly and the second cable connection assembly are both electrically connected to the electrical control device, the other end of the first cable connection assembly is electrically connected to the excitation sensor of the segmented roller one through the first high-temperature cable, the first lead-out wire assembly, and the first water-cooling wire in sequence, and the other end of the second cable connection assembly is electrically connected to the excitation sensor of the segmented roller two through the second high-temperature cable, the second lead-out wire assembly, and the second water-cooling wire in sequence; the first water-cooling wire passes through the first inlet and outlet water cylinder, and the second water-cooling wire passes through the second inlet and outlet water cylinder.

[0016] Furthermore, the intermediate piece is a double-ended bearing seat.

[0017] Preferably, the gap is an annular gap.

[0018] Furthermore, first fixing holes for horizontally leading out and fixing the first high-temperature cable and the second high-temperature cable are provided on both the first lead-out wire assembly and the second lead-out wire assembly.

[0019] Furthermore, the first outlet box and the second outlet box are both sealed cavities, and the sealed cavities are filled with nitrogen.

[0020] Furthermore, the first cable connection assembly and the second cable connection assembly both use linear cable connectors.

[0021] Based on the same inventive concept, the present invention also provides an electromagnetic stirring device, comprising an offline storage rack, a hoisting tool, and the multi-pole segmented electromagnetic roller as described above;

[0022] When the multi-pole segmented electromagnetic roller is not online, the multi-pole segmented electromagnetic roller is placed on an offline storage rack;

[0023] When the multi-pole segmented electromagnetic roller is put on line, the multi-pole segmented electromagnetic roller is lifted off from the offline storage rack by a lifting tool and placed in the secondary cooling zone sector of the slab continuous casting and rolling mill.

[0024] Preferably, the offline storage rack includes multiple pairs of relatively arranged support legs, a first main support channel steel and a second main support channel steel respectively arranged on the support legs on both sides, a first reinforcing rib arranged between the first main support channel steel and the second main support channel steel, a support rib arranged between the support legs on both sides, a connecting channel steel arranged between adjacent support legs on the same side, and a placement plate arranged on the first main support channel steel and the second main support channel steel; a second fixing hole for fixing the multi-pole segmented electromagnetic roller B and a first water hole for conducting a factory water test are arranged on the placement plate.

[0025] Preferably, the lifting tool includes a balancing frame, lifting ears provided at both ends of the balancing frame, steel wire ropes provided on the lifting ears, and a lifting unit provided at the bottom of the balancing frame; the number of the lifting units is the same as the number of bearing seats of the multi-pole segmented electromagnetic roller.

[0026] Based on the same inventive concept, the present invention also provides a roller electromagnetic stirring system for slab continuous casting and rolling, comprising an electrical control device, a slab continuous casting and rolling mill, a cooling water device provided on a secondary cooling zone sector of the slab continuous casting and rolling mill, and a first pair of rollers and a second pair of rollers provided on the secondary cooling zone sector of the slab continuous casting and rolling mill;

[0027] The first pair of rollers is close to the crystallizer of the slab continuous casting and rolling mill, and the second pair of rollers is far from the crystallizer of the slab continuous casting and rolling mill; the first pair of rollers and the second pair of rollers each include four sections of multi-pole segmented electromagnetic rollers as described above, wherein two sections of the multi-pole segmented electromagnetic rollers are located on the outer arc side of the second cooling zone sector, and the other two sections of the multi-pole segmented electromagnetic rollers are located on the inner arc side of the second cooling zone sector, and the two sections of the multi-pole segmented electromagnetic rollers on the same surface are located on the same straight line;

[0028] The electrical control device is electrically connected to the multi-pole segmented electromagnetic roller and the cooling water device respectively.

[0029] Furthermore, the electrical control device includes a rectifier transformer, a power distribution and industrial control cabinet and a variable frequency power supply cabinet; the input end of the rectifier transformer is electrically connected to the external power supply, and its output end is electrically connected to the power distribution and industrial control cabinet; the output end of the power distribution and industrial control cabinet is electrically connected to the variable frequency power supply cabinet and the cooling water device respectively.

[0030] Preferably, the electrical control device further includes an industrial computer, an EMS monitoring system and a 3G remote monitoring system, and the industrial computer, the EMS monitoring system and the 3G remote monitoring system are respectively connected to the power distribution and the industrial control cabinet via a network.

[0031] Furthermore, the system also includes offline storage racks and lifting tools;

[0032] When the multi-pole segmented electromagnetic roller is not online, the multi-pole segmented electromagnetic roller is placed on an offline storage rack;

[0033] When the multi-pole segmented electromagnetic roller is put on line, the multi-pole segmented electromagnetic roller is lifted off from the offline storage rack by a lifting tool and placed in the secondary cooling zone sector of the slab continuous casting and rolling mill.

[0034] Based on the same inventive concept, the present invention also provides a control method for the roller electromagnetic stirring system for slab continuous casting and rolling as described above, comprising the following steps:

[0035] An electrical control device is used to input a first current into the first pair of rollers to generate a small electromagnetic force; a second current is input into the second pair of rollers to generate a large electromagnetic force; wherein the value range of the first current is 0 to 200A, and the value range of the second current is 200 to 400A.

[0036] Beneficial effects

[0037] Compared with the prior art, the advantages of the present invention are:

[0038] The present invention provides a multi-pole segmented electromagnetic roller, in which the electromagnetic stirring roller adopts a segmented structure, which can reduce the deformation of the shaft sleeve and improve the rigidity while increasing the inner diameter of the roller sleeve and the winding space; at the same time, the excitation sensor includes multiple pairs of excitation coils, which increases the number of NS pole closed magnetic circuits, makes the alternating magnetic field distribution more uniform, improves the central magnetic field intensity and average magnetic field intensity acting on the ingot, increases the electromagnetic thrust, increases the stirring action area and the stirring electromagnetic force, and improves the equiaxed crystal ratio of the ingot, consumes less electricity, and has more stable finished product quality, thereby improving the metallurgical effect of the ingot produced by the same CSP thin slab continuous casting and rolling machine for high-quality steel.

[0039] The present invention directly arranges automatic water inlets and outlets on the bearing seat. The cooling water flows into the water inlet and outlet chamber through the automatic water inlet and outlet at one end, then enters the water inlet and outlet cylinder and flows into the electromagnetic stirring roller, and finally returns to the cooling water device from the water inlet and outlet cylinder, the water inlet and outlet chamber and the automatic water inlet and outlet at the other end to achieve cooling. At the same time, the cable connection assembly adopts a linear cable connector, which solves the problem that the installation space of the fan-shaped segment is small and it is impossible to install a seated cable connector and an inlet and outlet pipe.

[0040] The electromagnetic stirring device provided by the present invention adds an offline storage rack and a lifting tool. The offline storage rack provides a use environment similar to that on a fan segment for the multi-pole segmented electromagnetic roller, thereby extending the service life of the multi-pole segmented electromagnetic roller.

[0041] The present invention provides a roller electromagnetic stirring system and control method for slab continuous casting and rolling. A small current is input to the first pair of rollers near the crystallizer, and the electromagnetic force generated is small, thereby avoiding liquid level fluctuations; a large current is input to the second pair of rollers far from the crystallizer, and the electromagnetic force generated is large, thereby improving the stirring effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only one embodiment of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0043] Figure 1 This is a schematic diagram of the structure of a single-pole integral electromagnetic roller in the background technology of the present invention, wherein 1-first cable connection assembly, 2-first outlet box, 3-first inlet and outlet cylinder, 4-first bearing seat, 5-electromagnetic stirring roller, 51-excitation sensor, 52-roller sleeve;

[0044] Figure 21 is a schematic structural diagram of a multi-pole segmented electromagnetic roller in Example 1 of the present invention, wherein: 1 - first cable connection assembly, 2 - first outlet box, 21 - first fixing hole, 22 - first lead wire assembly, 3 - first water inlet and outlet cylinder, 31 - first water inlet and outlet chamber, 4 - first bearing seat, 5 - electromagnetic stirring roller, 51 - excitation sensor, 52 - roller sleeve, 53 - segmented roller 1, 54 - middle piece, 55 - segmented roller 2, 6 - second bearing seat, 61 - automatic water inlet and outlet, 7 - second water inlet and outlet cylinder, 8 - second outlet box, 9 - second cable connection assembly;

[0045] Figure 3 Schematic diagram of the structure of the electromagnetic stirring device in the second embodiment of the present invention, wherein A-offline storage rack, A33-first mounting bolt, B-multi-pole segmented electromagnetic roller, C-housing tool, C46-second mounting bolt or mounting bolt of the hoisting unit;

[0046] Figure 4 This is a front view of the offline storage rack in Example 2 of the present invention, wherein A1 is a support leg, A2 is a first main support channel steel / second main support channel steel, A3 is a placement plate, A31 is a first mounting base, A32 is a second mounting base, and A4 is a connecting channel steel;

[0047] Figure 5 This is a side view of the offline storage rack in Example 2 of the present invention, wherein A1 is a support leg, A5 is a support rib, A6 is a first reinforcement rib, A7 is a cover plate, and A8 is a hexagon socket screw;

[0048] Figure 6 This is a front view of the lifting tool in Example 2 of the present invention, wherein C1-wire rope, C11-wire rope body, C12-shackle, C13-splint, C2-lifting eye, C3-balance frame, C31-I-beam, C32-second reinforcement rib, C4-lifting unit, C41-first end plate, C42-second end plate;

[0049] Figure 7 This is a side view of the lifting tool in Example 2 of the present invention, wherein C31 is an I-beam, C41 is a first end plate, C42 is a second end plate, C43 is a lifting plate, C44 is a connecting plate, C45 is a spacer, and C46 is a second mounting bolt or a mounting bolt of the lifting unit;

[0050] Figure 8 This is a schematic structural diagram of a roller-type electromagnetic stirring system for slab continuous casting and rolling in Example 3 of the present invention, wherein A-offline storage rack, B-multi-pole segmented electromagnetic roller, C-housing tool, D-secondary cooling zone sector, and E-crystallizer;

[0051] Figure 9This is a schematic diagram of the installation of multi-pole segmented electromagnetic rollers in the secondary cooling zone sector in Example 3 of the present invention, wherein D is the secondary cooling zone sector, E is the crystallizer, F is the ingot, G is the first pair of rollers, and H is the second pair of rollers;

[0052] Figure 10 This is a structural diagram of the multi-pole segmented electromagnetic rollers in Example 3 of the present invention applied to the CSP thin slab continuous casting and rolling mill, wherein B-multi-pole segmented electromagnetic rollers, D-second cooling zone fan-shaped segment, and I-bearing seat mounting base. DETAILED DESCRIPTION

[0053] The following is a clear and complete description of the technical solutions of the present invention in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts are within the scope of protection of the present invention.

[0054] The following specific embodiments are used to describe the technical solution of the present application in detail. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0055] Example 1

[0056] like Figure 2 As shown, the present embodiment provides a multi-pole segmented electromagnetic roller, comprising an electromagnetic stirring roller 5, a first bearing seat 4 and a second bearing seat 6, a first inlet and outlet water cylinder 3 and a second inlet and outlet water cylinder 7, a first inlet and outlet water chamber 31 and a second inlet and outlet water chamber, a first outlet box 2 and a second outlet box 8, a first lead wire assembly 22 and a second lead wire assembly, a first cable connection assembly 1 and a second cable connection assembly 9.

[0057] The electromagnetic stirring roller 5 includes a segmented roller 1 53, a segmented roller 2 55 and an intermediate piece 54 for connecting the segmented roller 1 53 and the segmented roller 2 55. The segmented roller 1 53 and the segmented roller 2 55 both include a roller sleeve 52 and an excitation sensor 51 arranged in the roller sleeve 52. A gap for the circulation of cooling water is provided between the roller sleeve 52 and the excitation sensor 51. The excitation sensor 51 includes multiple pairs of excitation coils.

[0058] In this embodiment, the roller sleeve 52 is made of a non-magnetic high-temperature alloy to protect the excitation sensor 51, and the magnetic circuit can penetrate the roller sleeve 52 to act on the continuous casting billet.

[0059] The middle piece 54 is a double-ended bearing seat without an excitation sensor 51. The first bearing seat 4, the second bearing seat 6, and the middle piece 54 all support the segmented roller 1 53 and the segmented roller 2 55. The first bearing seat 4, the second bearing seat 6, and the double-ended bearing seat are all equipped with bearings.

[0060] The diameter of the integral electromagnetic roller is similar to that of the existing support roller (≤φ160mm). The limited winding space directly affects the magnitude of the electromagnetic thrust. Given a fixed roller diameter, the inner diameter of the roller sleeve 52 is increased to increase the winding space. This increased inner diameter reduces the sleeve 52's wall thickness, making it more susceptible to deformation under stress. Compared to conventional single-pole integral electromagnetic rollers used in CSP thin slab continuous casting and rolling, the present invention utilizes a segmented structure with shorter segmented rollers 1 53 and 2 55. This increases the inner diameter of the roller sleeve 52, increasing the winding space, while minimizing sleeve deformation and improving rigidity. This allows for a better adaptation to the small diameter and close roller spacing of the support rollers in the sector segments of CSP thin slab continuous casting and rolling mills.

[0061] The pole pair number of the excitation inductor 51 is optimized, the number of excitation coils of the excitation inductor 51 is increased, and the number of NS pole closed magnetic circuits is increased, so that the alternating magnetic field distribution is more uniform, and the central magnetic field intensity (about 150% of the single-pole integral electromagnetic roller) and the average magnetic field intensity (about 200% of the single-pole integral electromagnetic roller) acting on the ingot are improved, the electromagnetic thrust is increased, the stirring action area and the stirring electromagnetic force are increased, the proportion of equiaxed crystals in the ingot is increased, the power consumption is small, the quality of the finished product is more stable, and the metallurgical effect of the ingot for producing high-quality steel by the same CSP thin slab continuous casting and rolling is improved.

[0062] The first bearing seat 4 is located on the segmented roller 1 53, and the second bearing seat 6 is located on the segmented roller 2 55. Both the first bearing seat 4 and the second bearing seat 6 are provided with automatic water inlets and outlets 61 that match the water inlets and outlets of the cooling water device on the fan-shaped segment. The first water inlet and outlet cylinder 3 is located on the first bearing seat 4 and communicates with the gap between the segmented roller 1 53. The second water inlet and outlet cylinder 7 is located on the second bearing seat 6 and communicates with the gap between the segmented roller 2 55. The first water inlet and outlet chamber 31 is fixedly mounted on the first water inlet and outlet cylinder 3 and communicates with the corresponding automatic water inlet and outlet 61 and the first water inlet and outlet cylinder 3. The second water inlet and outlet chamber is fixedly mounted on the second water inlet and outlet cylinder 7 and communicates with the corresponding automatic water inlet and outlet 61 and the second water inlet and outlet cylinder 7.

[0063] For example, the cooling water flowing out of the cooling water device flows into the first water inlet and outlet chamber 31 through the automatic water inlet and outlet 61 on the first bearing seat 4, and then flows into the first water inlet and outlet cylinder 3. The cooling water in the first water inlet and outlet cylinder 3 cools the first lead wire assembly 22 therein on the one hand, and flows into the gap of the segmented roller 1 53 on the other hand, and flows into the gap of the segmented roller 2 55 through the intermediate piece 54. The cooling water that has undergone heat exchange flows back to the cooling water device through the second water inlet and outlet cylinder 7, the second water inlet and outlet chamber, and the automatic water inlet and outlet 61 in turn, taking away the heat generated by the electromagnetic stirring roller 5 when it is running on current and the heat radiation from the on-site environment, thereby cooling the electromagnetic stirring roller 5. Similarly, the automatic water inlet and outlet 61 on the first bearing seat 4 can also be used as the water outlet, and the automatic water inlet and outlet 61 on the second bearing seat 6 can be used as the water inlet.

[0064] The single-pole integral electromagnetic roller is directly provided with an inlet and outlet pipe on the inlet and outlet water cylinder, and is connected to the cooling water device through the inlet and outlet water pipe. Since the space at both ends of the second cooling zone fan-shaped segment is narrow, there is no installation space for the inlet and outlet water pipe or the installation of the inlet and outlet water pipe is difficult; the present invention is provided with an automatic inlet and outlet water port 61 on the bearing seat, and a small inlet and outlet water chamber is fixedly provided on the inlet and outlet water cylinder. The cooling water flows into and out of the inlet and outlet water cylinder through the automatic inlet and outlet water port 61 and the inlet and outlet water chamber, which solves the problem that the inlet and outlet water pipe cannot be installed or the installation is difficult due to the small installation space of the fan-shaped segment.

[0065] The first outlet box 2 is connected to the first inlet and outlet water cylinder 3 through a seal, and the second outlet box 8 is connected to the second inlet and outlet water cylinder 7 through a seal. The seal prevents the cooling water in the inlet and outlet water cylinder from seeping into the outlet box; the first lead-out line assembly 22 is located in the first outlet box 2 and the first inlet and outlet water cylinder 3, and the second lead-out line assembly is located in the second outlet box 8 and the second inlet and outlet water cylinder 7; one end of the first cable connection assembly 1 and the second cable connection assembly 9 are both electrically connected to the electrical control device, and the other end of the first cable connection assembly 1 is electrically connected to the excitation sensor 51 of the segmented roller 1 53 through the first high-temperature cable, the first lead-out line assembly 22, and the first water cooling line in sequence, and the other end of the second cable connection assembly 9 is electrically connected to the excitation sensor 51 of the segmented roller 2 55 through the second high-temperature cable, the second lead-out line assembly, and the second water cooling line in sequence; the first water cooling line passes through the first inlet and outlet water cylinder 3, and the second water cooling line passes through the second inlet and outlet water cylinder 7. The lead wire assembly serves to connect the high-temperature cable and the water-cooling line, and the water-cooling line can be cooled by the cooling water in and out of the water cylinder.

[0066] In this embodiment, a first fixing hole 21 is provided on the first lead-out wire assembly 22 and the second lead-out wire assembly. The first fixing hole 21 is used for the first high-temperature cable line and the second high-temperature cable line to be horizontally led out and fixed from the corresponding outlet box, which can save space and make the outlet box better adapt to the limited space of the fan segment.

[0067] In this embodiment, the first outlet box 2 and the second outlet box 8 are both sealed cavities filled with nitrogen, which ensures that the lead-out wire assembly and cable connectors in the outlet boxes are dry.

[0068] In this embodiment, the first cable connection assembly 1 and the second cable connection assembly 9 both use linear cable connectors, which solve the problem that a seated cable connector cannot be installed or is difficult to install due to the small space of the sector segment.

[0069] Example 2

[0070] This embodiment provides an electromagnetic stirring device, such as Figure 3 As shown, it includes an offline storage rack A, a lifting tool C, and the multi-pair-pole segmented electromagnetic roller B described in Example 1. When the multi-pair-pole segmented electromagnetic roller B is not online, the multi-pair-pole segmented electromagnetic roller B is placed on the offline storage rack A by bolt connection. When the multi-pair-pole segmented electromagnetic roller B is online, the multi-pair-pole segmented electromagnetic roller B is lifted off the offline storage rack A by the lifting tool C and placed in the secondary cooling zone sector of the slab continuous casting and rolling mill.

[0071] The offline storage rack A provides a usage environment similar to that on a fan segment for the multi-pole segmented electromagnetic roller B, thereby extending the service life of the multi-pole segmented electromagnetic roller B.

[0072] In this embodiment, Figure 4 and 5 As shown, the offline storage rack A includes multiple pairs of relatively arranged support legs A1, a first main support channel steel and a second main support channel steel respectively arranged on the support legs A1 on both sides, a first reinforcing rib A6 arranged between the first main support channel steel and the second main support channel steel, a support rib A5 arranged between the support legs A1 on both sides, a connecting channel steel A4 arranged between adjacent support legs A1 on the same side, and a placement plate A3 arranged on the first main support channel steel and the second main support channel steel; according to the mounting base of the multi-pole segmented electromagnetic roller B bearing seat, a second fixing hole and a first water hole are set on the placement plate A3, the second fixing hole is used to fix the multi-pole segmented electromagnetic roller B, the second fixing hole is designed to be a waist-shaped hole, and the position of the second fixing hole can be adjusted according to the mounting holes of different positions and sizes on the mounting base of the multi-pole segmented electromagnetic roller B bearing seat, and the first water hole is used for the factory water test of the multi-pole segmented electromagnetic roller B.

[0073] A first mounting base A31 and a second mounting base A32 are also provided on the placement plate A3. The first mounting base A31 is provided with a waist-shaped fixing hole and a second water hole. The second mounting base A32 has only the waist-shaped fixing hole. The waist-shaped fixing hole is used to secure the multi-pole segmented electromagnetic roller B, while the second water hole is used for factory water testing of the multi-pole segmented electromagnetic roller B. The first mounting bases A31 on either side correspond to the first and second bearing seats 4 and 6 on either side of the multi-pole segmented electromagnetic roller B, respectively. The second mounting base A32 in the middle corresponds to the double-end bearing seat.

[0074] A cover plate A7 and a hexagon socket screw A8 are provided under the placement plate A3. When the water flow test of the multi-pole segmented electromagnetic roller B is completed, the water hole is sealed by the cover plate A7 to prevent debris from entering the water hole and then entering the water hole under the bearing seat.

[0075] The first reinforcing rib A6 ensures the structural strength of the offline storage rack A, and the supporting rib A5 and the connecting channel steel A4 ensure the structural stability of the offline storage rack A.

[0076] The lifting tool C is a tool for transporting the multi-pole segmented electromagnetic roller B to the corresponding installation position of the sector segment based on the characteristic that the multi-pole segmented electromagnetic roller B is easily damaged by external impact, thereby protecting the multi-pole segmented electromagnetic roller.

[0077] In this embodiment, Figure 6 As shown, the lifting tool C includes a balancing frame C3, lifting ears C2 provided at both ends of the balancing frame C3, a wire rope C1 provided on the lifting ears C2, and a lifting unit C4 provided at the bottom of the balancing frame C3; the number of the lifting units C4 is the same as the number of the bearing seats of the multi-pole segmented electromagnetic roller B. For example, the electromagnetic roller is Figure 1 In the case of the integral type shown, there is a bearing seat on each side of the electromagnetic roller, and the number of hoisting units C4 is 2; the electromagnetic roller is Figure 2 In the segmented type shown, there is a bearing seat on each side of the electromagnetic roller, and the middle piece is a double-ended bearing seat, so the number of lifting units C4 is 4.

[0078] The position of the lifting lug C2 is determined by the weight of the lifting tool C and the weight of the multi-pole segmented electromagnetic roller B. Lifting lug C2 is provided with a lifting hole for attaching the wire rope C1. The size of the lifting hole is determined by the size of the shackle C12 of the wire rope C1. During lifting, the multi-pole segmented electromagnetic roller B is mounted on the lifting plate C43 of the lifting unit C4 using mounting bolts C46. The ferrule on the wire rope C1 is connected to the lifting equipment - the overhead crane. The multi-pole segmented electromagnetic roller B can then be lifted and transported.

[0079] like Figure 6As shown, there are two wire ropes C1, each consisting of a shackle C12, a wire rope body C11, a clamping plate C13, and a ferrule. One end of the wire rope body C11 is secured to the shackle C12 via the clamping plate C13. The shackle C12 passes through the lifting hole in the lifting lug C2, and the other end of the wire rope body C11 is secured to the ferrule via the clamping plate C13. The diameter of the wire rope body C11 and the type of shackle C12 are determined by the deadweight of the lifting tool C and the weight of the multi-pole segmented electromagnetic roller B. The wire rope body C11 forms an acute angle α (30° to 60°) with the balance frame C3. During lifting, the ferrule is connected to the overhead crane, the lifting equipment.

[0080] like Figure 6 As shown, the balancing frame C3 consists of an I-beam C31 and multiple second reinforcing ribs C32 welded to the web of the I-beam C31. The length of the I-beam C31 matches the spacing between the bearing blocks (i.e., the first and second bearing blocks) on either side of the multi-pole segmented electromagnetic roller B. The second reinforcing ribs C32 ensure the structural strength of the balancing frame C3 and are used to support the weight of the electromagnetic roller B during lifting.

[0081] like Figure 6 and 7 As shown, the hoisting unit C4 includes a first end plate C41, a second end plate C42, a connecting plate C44, a hoisting plate C43, and mounting bolts C46. The first and second end plates C41 and C42 are located at opposite ends of the hoisting plate C43, with one end of each plate fixed to the hoisting plate C43 and the other end fixed to the balance frame C3. The first and second end plates C41 and C42 serve as connecting supports. A connecting plate C44 is provided between the first and second end plates C41 and C42 to enhance the structural stability of the hoisting unit C4. The hoisting plate C43 has mounting holes that mate with the mounting holes on the bearing seat of the multi-pole segmented electromagnetic roller B. Mounting bolts C46 securely connect the mounting holes on the hoisting plate C43 to the mounting holes on the bearing seat of the multi-pole segmented electromagnetic roller B. In this embodiment, the mounting hole on the lifting plate C43 is a waist-shaped hole. The waist-shaped hole is designed to be adjustable in four directions: up, down, left, and right. This can meet the different position and size requirements of the two mounting holes on the multi-pole segmented electromagnetic roller B bearing seat.

[0082] A spacer C45 is provided on the mounting hole of the hanging plate C43. The mounting bolt C46 includes a hexagonal nut and a hexagonal head bolt. The spacer C45 increases the stress-bearing surface of the hexagonal head bolt to prevent the mounting hole from being too large, causing the hexagonal head bolt to be connected in the air or even fall off.

[0083] like Figure 3As shown, the lifting tool C lifts the electromagnetic roller B to the top of the offline storage rack A. After the lifting tool C is lowered, the bottom of each bearing seat of the electromagnetic roller B is fixed to the offline storage rack A through the first mounting bolt A33 (i.e., the mounting bolt that cooperates with the fixing holes on the placement plate A3, the first mounting base A31 and the second mounting base A32). Then, the second mounting bolt C46 fixed to the upper part of the bearing seat (i.e., the mounting bolt on the lifting plate) is loosened, and the special lifting tool C is lifted and returns to the waiting position.

[0084] Example 3

[0085] This embodiment provides a roller type electromagnetic stirring system for slab continuous casting and rolling, such as Figure 8 As shown, it includes an electrical control device, a slab continuous casting and rolling mill, a cooling water device provided on the second cooling zone sector D of the slab continuous casting and rolling mill, and a first pair of rollers G and a second pair of rollers H provided on the second cooling zone sector D of the slab continuous casting and rolling mill; the first pair of rollers G is close to the crystallizer E of the slab continuous casting and rolling mill, and the second pair of rollers H is far away from the crystallizer E of the slab continuous casting and rolling mill; the first pair of rollers G and the second pair of rollers H each include four sections of multi-pole segmented electromagnetic rollers B as described in Example 1, wherein two sections of multi-pole segmented electromagnetic rollers B are located on the outer arc side of the second cooling zone sector D, and the other two sections of multi-pole segmented electromagnetic rollers B are located on the inner arc side of the second cooling zone sector D, and the two sections of multi-pole segmented electromagnetic rollers B on the same surface are located on the same straight line, as shown in FIG. Figure 9 and 10 As shown, the electrical control device is electrically connected to each section of the multi-pole segmented electromagnetic roller B and the cooling water device.

[0086] The electrical control device includes a rectifier transformer, power distribution and industrial control cabinet, variable frequency power supply cabinet, industrial computer, EMS monitoring system and 3G remote monitoring system; the industrial computer, EMS monitoring system and 3G remote monitoring system are respectively connected to the power distribution and industrial control cabinet through the network; the input end of the rectifier transformer is electrically connected to the external power supply, and its output end is electrically connected to the power distribution and industrial control cabinet; the output ends of the power distribution and industrial control cabinet are respectively electrically connected to the variable frequency power supply cabinet and the cooling water device.

[0087] The external power supply is stepped down by a rectifier transformer and then fed into the power distribution and industrial control cabinet. The cabinet then distributes the power to the variable frequency power supply cabinet, which then modulates the frequency and voltage to produce the frequency, current, and voltage suitable for the operation of the multi-pole segmented electromagnetic rollers B. These control the first pair of rollers G and second pair of rollers H, installed in sector D of the secondary cooling zone of the same continuous casting and rolling mill. A low current is applied to the first pair of rollers G, located near the mold E zone, while a high current is applied to the second pair of rollers H, located far from the mold E zone, energizing the multi-pole segmented electromagnetic rollers B. The electromagnetic force generated by the multi-pole segmented electromagnetic rollers B acts on the ingot, and the variable frequency power supply cabinet provides high-power, low-frequency variable frequency power to the multi-pole segmented electromagnetic rollers B. The industrial computer, EMS monitoring system, and 3G remote monitoring system monitor and remotely control the multi-pole segmented electromagnetic rollers B.

[0088] In this embodiment, the system also includes an offline storage rack A and a lifting tool C; when the multi-pair-pole segmented electromagnetic roller B is not online, the multi-pair-pole segmented electromagnetic roller B is placed on the offline storage rack A by bolt connection; when the multi-pair-pole segmented electromagnetic roller B is online, the multi-pair-pole segmented electromagnetic roller B is lifted from the offline storage rack A by the lifting tool C and placed in the second cooling zone fan section of the slab continuous casting and rolling mill.

[0089] The offline storage rack A provides a similar operating environment for the multi-pole segmented electromagnetic roller B as on a sector, extending its service life. The lifting tool C, designed to transport the multi-pole segmented electromagnetic roller B to its corresponding installation location within the sector, protects it, as it is susceptible to damage from external impacts.

[0090] The specific structures of the linear storage rack A and the lifting tool C can be found in Example 2.

[0091] This embodiment further provides a control method for the roller-type electromagnetic stirring system for slab continuous casting and rolling as described in the third embodiment, comprising the following steps:

[0092] The electrical control device is used to input a first current to the first pair of rollers G to generate a small electromagnetic force; the second current is input to the second pair of rollers H to generate a large electromagnetic force; wherein the value range of the first current is 0~200A, and the value range of the second current is 200~400A.

[0093] The first pair of rollers G near the crystallizer E is input with a small current, which generates a small electromagnetic force and avoids causing liquid level fluctuations; the second pair of rollers H far away from the crystallizer E is input with a large current, which generates a large electromagnetic force and improves the stirring effect.

[0094] The above disclosure is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of changes or modifications within the technical scope disclosed in the present invention, and they should all be covered by the scope of protection of the present invention.

Claims

1. A multi-pole segmented electromagnetic roller, provided in the secondary cooling zone sector of a slab continuous casting and rolling mill, characterized in that: The electromagnetic roller comprises: An electromagnetic stirring roller, comprising a segmented roller 1, a segmented roller 2, and an intermediate piece for connecting the segmented roller 1 and the segmented roller 2, wherein the segmented roller 1 and the segmented roller 2 each comprise a roller sleeve and an excitation sensor disposed within the roller sleeve, a gap being provided between the roller sleeve and the excitation sensor, and the excitation sensor comprising a plurality of pairs of excitation coils; a first bearing seat and a second bearing seat, wherein the first bearing seat is provided on the first segmented roller, and the second bearing seat is provided on the second segmented roller, and both the first bearing seat and the second bearing seat are provided with automatic water inlets and outlets adapted to the water inlets and outlets of the cooling water device on the sector; a first water inlet and outlet cylinder and a second water inlet and outlet cylinder, wherein the first water inlet and outlet cylinder is provided on the first bearing seat and communicated with the gap of the first segmented roller, and the second water inlet and outlet cylinder is provided on the second bearing seat and communicated with the gap of the second segmented roller; A first water inlet and outlet chamber and a second water inlet and outlet chamber, wherein the first water inlet and outlet chamber is fixedly mounted on the first water inlet and outlet cylinder and is in communication with the corresponding automatic water inlet and outlet and the first water inlet and outlet cylinder; the second water inlet and outlet chamber is fixedly mounted on the second water inlet and outlet cylinder and is in communication with the corresponding automatic water inlet and outlet and the second water inlet and outlet cylinder; a first outlet box and a second outlet box, wherein the first outlet box is connected to the first water inlet and outlet cylinder, and the second outlet box is connected to the second water inlet and outlet cylinder; A first lead-out line assembly and a second lead-out line assembly, wherein the first lead-out line assembly is located in the first outlet box and the first water inlet and outlet cylinder, and the second lead-out line assembly is located in the second outlet box and the second water inlet and outlet cylinder; One end of each of the first cable connection assembly and the second cable connection assembly is electrically connected to the electrical control device; the other end of the first cable connection assembly is electrically connected to the excitation sensor of the segmented roller one through a first high-temperature cable, a first lead-out assembly, and a first water-cooling line in sequence; the other end of the second cable connection assembly is electrically connected to the excitation sensor of the segmented roller two through a second high-temperature cable, a second lead-out assembly, and a second water-cooling line in sequence; the first water-cooling line passes through the first inlet and outlet water cylinder, and the second water-cooling line passes through the second inlet and outlet water cylinder; The intermediate piece is a double-ended bearing seat; The first lead-out line assembly and the second lead-out line assembly are both provided with first fixing holes for horizontally leading out and fixing the first high-temperature cable line and the second high-temperature cable line.

2. The multi-pole segmented electromagnetic roller according to claim 1, characterized in that: The first outlet box and the second outlet box are both sealed cavities, and the sealed cavities are filled with nitrogen.

3. The multi-pole segmented electromagnetic roller according to claim 1 or 2, characterized in that: The first cable connection assembly and the second cable connection assembly both use linear cable connectors.

4. An electromagnetic stirring device, characterized in that: It comprises an offline storage rack, a lifting tool and a multi-pole segmented electromagnetic roller according to any one of claims 1 to 3; When the multi-pole segmented electromagnetic roller is not online, the multi-pole segmented electromagnetic roller is placed on an offline storage rack; When the multi-pole segmented electromagnetic roller is put on line, the multi-pole segmented electromagnetic roller is lifted off from the offline storage rack by a lifting tool and placed in the secondary cooling zone sector of the slab continuous casting and rolling mill.

5. The electromagnetic stirring device according to claim 4, characterized in that: The offline storage rack includes multiple pairs of relatively arranged support legs, a first main support channel steel and a second main support channel steel respectively arranged on the support legs on both sides, a first reinforcing rib arranged between the first main support channel steel and the second main support channel steel, a support rib arranged between the support legs on both sides, a connecting channel steel arranged between adjacent support legs on the same side, and a placement plate arranged on the first main support channel steel and the second main support channel steel; a second fixing hole for fixing the multi-pole segmented electromagnetic roller B and a first water hole for conducting a factory water test are arranged on the placement plate.

6. The electromagnetic stirring device according to claim 4, characterized in that: The lifting tool includes a balancing frame, lifting ears arranged at both ends of the balancing frame, steel wire ropes arranged on the lifting ears, and a lifting unit arranged at the bottom of the balancing frame; the number of the lifting units is the same as the number of bearing seats of the multi-pole segmented electromagnetic roller.

7. A roller-type electromagnetic stirring system for slab continuous casting and rolling, characterized by: It comprises an electrical control device, a slab continuous casting and rolling mill, a cooling water device provided on a secondary cooling zone sector of the slab continuous casting and rolling mill, and a first pair of rollers and a second pair of rollers provided on the secondary cooling zone sector of the slab continuous casting and rolling mill; The first pair of rollers is close to the crystallizer of the slab continuous casting and rolling mill, and the second pair of rollers is far away from the crystallizer of the slab continuous casting and rolling mill; the first pair of rollers and the second pair of rollers each include four sections of multi-pole segmented electromagnetic rollers according to any one of claims 1 to 3, wherein two sections of the multi-pole segmented electromagnetic rollers are located on the outer arc side of the second cooling zone sector, and the other two sections of the multi-pole segmented electromagnetic rollers are located on the inner arc side of the second cooling zone sector, and the two sections of the multi-pole segmented electromagnetic rollers on the same plane are located on the same straight line; The electrical control device is electrically connected to the multi-pole segmented electromagnetic roller and the cooling water device respectively.

8. The roller-type electromagnetic stirring system for slab continuous casting and rolling according to claim 7, characterized in that: The electrical control device includes a rectifier transformer, a power distribution and industrial control cabinet and a frequency conversion power supply cabinet; the input end of the rectifier transformer is electrically connected to the external power supply, and its output end is electrically connected to the power distribution and industrial control cabinet; the output ends of the power distribution and industrial control cabinet are electrically connected to the frequency conversion power supply cabinet and the cooling water device respectively.

9. The roller-type electromagnetic stirring system for slab continuous casting and rolling according to claim 8, characterized in that: The electrical control device further comprises an industrial computer, an EMS monitoring system and a 3G remote monitoring system, which are respectively connected to the power distribution and industrial control cabinet via a network.

10. The roller-type electromagnetic stirring system for slab continuous casting and rolling according to claim 7, 8 or 9, characterized in that: The system also includes offline storage racks and lifting tools; When the multi-pole segmented electromagnetic roller is not online, the multi-pole segmented electromagnetic roller is placed on an offline storage rack; When the multi-pole segmented electromagnetic roller is put on line, the multi-pole segmented electromagnetic roller is lifted off from the offline storage rack by a lifting tool and placed in the secondary cooling zone sector of the slab continuous casting and rolling mill.

11. A method for controlling a roller-type electromagnetic stirring system for slab continuous casting and rolling according to any one of claims 7 to 10, comprising the following steps: Using an electrical control device to input a first current into the first pair of rollers to generate a small electromagnetic force; A second current is input to the second pair of rollers to generate a large electromagnetic force; wherein the value range of the first current is 0~200A, and the value range of the second current is 200~400A.

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