Self-adaptive electromagnetic braking device and system

Abstract

The invention provides a self-adaptive electromagnetic braking device and system. The self-adaptive electromagnetic braking device comprises an iron core magnet yoke, an iron core magnetic pole, a coil, a plate blank and a coil lifting device. The coil is wound on the iron core magnetic pole and is fixed relative to the iron core magnetic pole, one end of the iron core magnetic pole is connected with the iron core magnet yoke, and the other end of the iron core magnetic pole directly faces a slab jet flow position; the iron core magnetic pole is located between the plate blank and the iron core magnet yoke, and a magnetic field generated by current input into the coil forms a loop from an N pole to an S pole among the iron core magnet yoke, the iron core magnetic pole and the plate blank; the upper portion of the plate blank is an inserting water opening, the iron core magnetic pole coincides with water outlet jet flow of the plate blank all the time, and then the jet flow is aligned with the iron core magnetic pole all the time to be sprayed. The magnetic pole and the coil transversely adopt an adjustable translation and rotation form, and the magnetic pole, the coil and the magnet yoke adopt an upper line adjustable form, so that the equipment can be manually and automatically adjusted according to the insertion depth and angle of the water gap, and the optimal braking area is realized.

Description

Technical Field

[0001] The present application relates to the field of mechanical structure design, and in particular, to an adaptive electromagnetic braking device and system. Background Art

[0002] The basic principle of electromagnetic braking technology is to set up a pair of steady magnetic fields perpendicular to the outlet flow in the water nozzle area. When the liquid metal cuts the magnetic lines of force and moves, according to Ohm's law, an induced current will be generated in the liquid metal. The interaction between the induced current and the steady magnetic field will generate a Lorentz force in the liquid metal that is opposite to the flow velocity, thereby inhibiting the flow of liquid metal, shortening the penetration depth of molten steel, reducing or eliminating the impact of high-temperature and high-speed molten steel on the narrow billet shell, preventing the remelting and leakage of the solidified shell, and inhibiting the fluctuation of the liquid level, thereby reducing the occurrence rate of slag rolls and large inclusion defects on the surface of the billet, which is beneficial to improving the surface quality of the billet.

[0003] With the development of steel production technology, the casting speed of continuous casting machines is getting higher and higher, and the requirements for the quality of ingots are also increasing accordingly. In the continuous casting process, the nozzle jet has an important influence on the flow of liquid metal. The jet position, shape, angle and other factors change with the change of production parameters. The fixed structure electromagnetic brake device is difficult to adapt to such changes, resulting in poor braking effect and failure to effectively inhibit the flow of liquid metal, which in turn affects the surface quality of the ingot.

[0004] The electromagnetic brake device in the prior art adopts a fixed structure, which has the advantage of simple and stable structure, but the disadvantage is that it cannot adapt to the dynamic changes of continuous casting conditions, such as changes in nozzle insertion depth, angle and slab width. Therefore, the current fixed electromagnetic brake device has limitations in controlling the jet area and cannot achieve the best braking effect, which in turn affects the quality of the casting and production efficiency.

[0005] The prior art is Chinese patent No. CN102099136B, which discloses an electromagnetic braking device on a continuous casting crystallizer. Specifically, the prior art discloses a continuous casting crystallizer of a continuous casting device for casting liquid metal, especially liquid steel, to produce slabs and thin slab products with a standard width of 750 to 3500 mm and a standard thickness of 30 to 500 mm, which has a direct impact on the liquid jet flowing out of the crystallizer immersion tube of the crystallizer, wherein, in order to improve product quality, the continuous casting equipment is equipped with an electromagnetic braking device. According to the invention suggestion, at least two magnetic poles symmetrically arranged relative to the vertical reference line of the crystallizer immersion tube are arranged on each wide side of the crystallizer, so that the main axis of the outlet cross section of the magnetic pole is oriented at a certain angle relative to the vertical reference line of the crystallizer immersion tube.

[0006] The shortcomings of the existing technology are: during the continuous casting production process, the working conditions are constantly changing, and the structural form and position of the flow field in the crystallizer change with the change of the continuous casting process parameters. When the shape, angle, insertion depth and slab width of the insertion nozzle change, the position of the jet also changes accordingly. The fixed electromagnetic braking device cannot accurately brake the jet area and cannot fully exert its effect. Summary of the invention

[0007] In view of the defects in the prior art, the purpose of this application is to provide an adaptive electromagnetic braking device and system.

[0008] According to the present application, an adaptive electromagnetic braking device and system are provided, including: an iron core yoke, an iron core pole, a coil, a slab and a coil lifting device;

[0009] The coil is wound on the core magnetic pole and fixed relative to the core magnetic pole, one end of the core magnetic pole is connected to the core magnetic yoke, and the other end faces the slab;

[0010] The core magnetic pole is located between the slab and the core magnetic yoke, and the magnetic field generated by the current passing through the coil forms a loop from the N pole to the S pole or from the S pole to the N pole between the core magnetic yoke, the core magnetic pole and the slab;

[0011] The slab is provided with a water inlet and a water outlet in sequence above and below, the jet enters the slab from the water inlet and is ejected from the water outlet, the core magnetic pole always coincides with the slab water outlet, so that the jet is always aimed at the core magnetic pole for ejection;

[0012] The coil lifting device is connected to the core yoke, and the coil lifting device can drive the core yoke to move up and down and then drive the core magnetic pole to move up and down;

[0013] The core magnetic pole can rotate around the core magnetic pole axis under the action of the first driving device, and the core magnetic pole can translate left and right under the action of the second driving device.

[0014] Preferably, the core yoke and the core pole are made of 45 steel or Q235.

[0015] Preferably, the core pole is in a trumpet shape.

[0016] Preferably, the first drive device and the second drive device may be pneumatically driven or electrically driven;

[0017] The coil lifting device can be driven hydraulically or electrically.

[0018] Preferably, at least two coils and iron core poles which are symmetrical with the central axis of the water inlet as the symmetry axis are arranged on one side of the slab, and the iron core poles share an iron core yoke.

[0019] Preferably, the rotation angle of the core magnetic pole is between -89° and 89°, and the angle variation range of the water outlet is also between -89° and 89°.

[0020] Preferably, the horizontal depth of the water outlet varies.

[0021] Preferably, the slab width can be adjusted within the maximum cross-sectional range of the continuous casting machine, and the spatial range of horizontal movement of the core magnetic poles is limited to the slab width.

[0022] Preferably, symmetrical coils, iron core yokes, iron core poles and coil lifting device structures are arranged on both sides of the slab with the central axis of the slab as the symmetry axis.

[0023] The present application also provides an adaptive electromagnetic braking system, characterized in that it includes the adaptive electromagnetic braking device mentioned above.

[0024] Compared with the prior art, this application has the following beneficial effects:

[0025] 1. The present application achieves the best braking area by setting the electromagnetic braking core to a trumpet-shaped structure, and the trumpet-shaped structure corresponds to the jet shape of the water outlet size and angle, so that the limited braking area is fully applied to the jet, reducing the ineffective braking area, and being able to maintain the maximum effect of the magnetic field on the jet, thereby reducing the flow rate of the molten steel and reducing the liquid level fluctuation.

[0026] 2. The present application adopts adjustable translation and rotation forms for the magnetic poles and coils in the lateral direction, and the magnetic poles, coils, and yokes are adjustable on the line, so that the equipment can be manually and automatically adjusted according to the insertion depth of the water nozzle to achieve the best braking area. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0028] Figure 1 This application mainly embodies the overall structural diagram of the adaptive electromagnetic brake device;

[0029] Figure 2 This application mainly embodies the schematic diagram of the slab structure of the adaptive electromagnetic brake device;

[0030] Figure 3 This is a schematic diagram of the rotation of the magnetic poles of the core of an embodiment of the adaptive electromagnetic brake device in the present application;

[0031] Figure 4 This application mainly embodies the schematic diagram of the iron core magnetic pole translation in the specific implementation manner of the adaptive electromagnetic braking device.

[0032] As shown in the figure: 1. water inlet; 2. iron core yoke; 3. slab; 4. iron core pole; 5. coil; 6. coil lifting device; 7. water outlet; 8. water outlet insertion depth; 9. slab width; 10. jet. DETAILED DESCRIPTION

[0033] The present application is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present application, but do not limit the present application in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present application. These all belong to the protection scope of the present application.

[0034] The adaptive electromagnetic braking device and system provided by the present application include: an iron core yoke 2, an iron core pole 4, a coil 5, a slab 3, and a coil lifting device 6; the coil 5 is wound on the iron core pole 4 and fixed relative to the iron core pole 4, one end of the iron core pole 4 is connected to the iron core yoke 2, and the other end faces the slab 3;

[0035] The core magnetic pole 4 is located between the slab 3 and the core magnetic yoke 2, and the magnetic field generated by the current passing through the coil 5 forms a loop from the N pole to the S pole or the S pole to the N pole between the core magnetic yoke 2, the core magnetic pole 4 and the slab 3; the slab 3 is provided with a water inlet 1 and a water outlet 7 in sequence above and below, and the core magnetic pole 4 always coincides with the water outlet 7 of the slab 3; the slab 3 is provided with a water inlet 1 and a water outlet 7 in sequence above and below, and the jet 10 enters the slab 3 from the water inlet 1 and is ejected from the water outlet 7, and the core magnetic pole 4 always coincides with the water outlet 7 of the slab 3, so that the jet 10 is always aimed at the core magnetic pole 4 for spraying.

[0036] The coil lifting device 6 is connected to the core yoke 2, and the coil lifting device 6 can drive the core yoke 2 to move up and down, thereby driving the core pole 4 to move up and down; the core pole 4 can rotate around the axis of the core pole 4 under the action of the first driving device, and the core pole 4 can move left and right under the action of the second driving device.

[0037] The core yoke 2 and the core pole 4 are made of 45# steel or Q235. The core pole 4 is in the shape of a trumpet. The first drive device and the second drive device can be pneumatically driven or electrically driven; the coil lifting device 6 can be driven hydraulically or electrically.

[0038] At least two coils 5 and iron core poles 4 are arranged on one side of the slab 3, which are symmetrical with the central axis of the water inlet 1 as the symmetry axis. The iron core poles 4 share the iron core yoke 2. The rotation angle of the iron core poles 4 is between -89° and 89°, and the angle variation range of the water outlet 7 is also between -89° and 89°. The horizontal depth of the water outlet 7 will change.

[0039] The slab width 9 can be adjusted within the maximum cross-section of the continuous casting machine, and the horizontal movement space of the core magnetic pole 4 is limited to the slab width 9. A symmetrical coil 5, core magnetic yoke 2, core magnetic pole 4 and coil lifting device 6 structure are arranged on both sides of the slab 3 with the central axis of the slab 3 as the symmetry axis.

[0040] The present application also provides an adaptive electromagnetic braking system, characterized in that it includes the adaptive electromagnetic braking device mentioned above.

[0041] A feasible embodiment of the present application is provided below.

[0042] The adaptive electromagnetic braking device provided in the present application includes an iron core yoke 2 and an iron core pole 4, and the material thereof is 45# steel or Q235. The selection of 45# steel or Q235 material can ensure both the material strength and the magnetic conductivity of the iron core. The shape of the iron core pole 4 is a trumpet shape, which is consistent with the shape of the jet 10. The iron core pole 4 is designed according to the shape of the water inlet 1 and the angle of the water inlet to ensure that the magnetic field from the iron core pole 4 completely acts on the jet 10. The coil 5 is wound on the iron core pole 4 and fixed to the iron core pole 4. The magnetic field generated by the coil 5 when it is energized forms a loop from the N pole to the S pole in the iron core pole 4, the iron core yoke 2 and the slab 3.

[0043] During the continuous casting process, the nozzle angle will change according to production requirements, ranging from -89° to 89°. Figure 2 As shown, the core magnetic pole 4 can change with the change of the nozzle angle, always keeping the jet 10 coincident with the core magnetic pole 4, and the rotation angle of the core magnetic pole 4 can also be adjusted between -89° and 89°, which can be adjusted manually, pneumatically or electrically. During the continuous casting production process, the nozzle insertion depth 8 will always change due to the adjustment of the slag line to prevent nozzle corrosion. The nozzle insertion depth 8 changes sinusoidally within the range of 70mm-300mm, such as Figure 3 As shown, the core pole 4, the core yoke 2, and the coil 5 can be changed by the coil lifting device 6 as the water nozzle insertion depth 8 changes, and the jet 10 is always kept coincident with the core pole 4. The core pole 4, the core yoke 2 and the coil 5 are also adjusted between 70mm-300mm. The coil lifting device 6 can be adjusted hydraulically or electrically.

[0044] During the continuous casting production process, the slab width 9 is constantly changing due to changes in the contract order specifications. The width change of the slab 3 is adjusted within the maximum cross-section range of the continuous casting machine, such as Figure 4 As shown, the core pole 4 and the coil 5 can be adjusted laterally on the core yoke 2 according to the slab width 9 to always keep the jet 10 coincident with the core pole 4, and the adjustment can be performed hydraulically or electrically.

[0045] The electromagnetic brake core adopts a trumpet-shaped structure, and the trumpet-shaped structure and the nozzle size and angle correspond to the jet 10 shape to achieve the best braking area. On the one hand, the limited braking area is fully applied to the jet 10 to reduce the ineffective braking area; on the other hand, the magnetic field can be kept to the maximum extent on the jet 10, reducing the flow rate of the molten steel and reducing the fluctuation of the liquid level.

[0046] The magnetic poles and coils 5 of the electromagnetic brake are in an adjustable rotation form, which can be adjusted manually and automatically according to the angle of the water nozzle to achieve the best braking area. The magnetic poles and coils 5 of the electromagnetic brake are in an adjustable translation form in the horizontal direction, which can be adjusted manually and automatically according to the width of the production slab 3 to achieve the best braking area. The magnetic poles, coils 5, and yokes of the electromagnetic brake are in an adjustable form on the line, which can be adjusted manually and automatically according to the water nozzle insertion depth 8 to achieve the best braking area. The magnetic field strength of the electromagnetic brake can be adaptively adjusted according to the continuous casting process parameters, and the current of the coil 5 can be automatically adjusted according to the parameters such as the pulling speed and the slab width 9, which can improve the production quality on the one hand and save energy and reduce carbon on the other.

[0047] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0048] The above describes the specific embodiments of the present application. It should be understood that the present application is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the substantive content of the present application. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other.

Claims

1. An adaptive electromagnetic braking device, characterized in that: include: An iron core yoke (2), an iron core pole (4), a coil (5), a slab (3), and a coil lifting device (6); The coil (5) is wound on the iron core magnetic pole (4) and fixed relative to the iron core magnetic pole (4); one end of the iron core magnetic pole (4) is connected to the iron core magnetic yoke (2), and the other end faces the jet position of the slab (3); The core magnetic pole (4) is located between the plate blank (3) and the core magnetic yoke (2); a magnetic field generated by passing current through the coil (5) forms a loop from the N pole to the S pole or from the S pole to the N pole between the core magnetic yoke (2), the core magnetic pole (4) and the plate blank (3); The slab (3) is provided with a water inlet (1) at the top, and a water outlet (7) at the bottom. The jet (10) enters the slab from the water inlet (1) and is ejected from the water outlet (7). The core magnetic pole (4) always overlaps with the water outlet (7) of the slab (3), so that the jet (10) always aligns with the core magnetic pole (4) for ejection. The coil lifting device (6) is connected to the iron core yoke (2), and the coil lifting device (6) can drive the iron core yoke (2) to move up and down, thereby driving the iron core magnetic pole (4) to move up and down; The iron core magnetic pole (4) can rotate axially around the iron core magnetic pole (4) under the action of the first driving device, and the iron core magnetic pole (4) can translate left and right under the action of the second driving device.

2. The adaptive electromagnetic brake device according to claim 1, characterized in that: The iron core yoke (2) and the iron core pole (4) are made of 45# steel or Q235.

3. The adaptive electromagnetic brake device according to claim 2, characterized in that: The shape of the iron core magnetic pole (4) is a trumpet shape.

4. The adaptive electromagnetic brake device according to claim 1, characterized in that: The first drive device and the second drive device may be pneumatically driven or electrically driven; The coil lifting device (6) can be driven hydraulically or electrically.

5. The adaptive electromagnetic brake device according to claim 1, characterized in that: At least two coils (5) and iron core magnetic poles (4) are arranged on one side of the slab (3) and are symmetrical with the central axis of the water inlet (1) as the symmetry axis. The iron core magnetic poles (4) share the iron core magnetic yoke (2).

6. The adaptive electromagnetic brake device according to claim 1, characterized in that: The rotation angle of the core magnetic pole (4) is between -89° and 89°, and the angle variation range of the water outlet (7) is also between -89° and 89°.

7. The adaptive electromagnetic brake device according to claim 1, characterized in that: The horizontal depth of the water outlet (7) will change.

8. The adaptive electromagnetic brake device according to claim 1, characterized in that: The width of the slab (3) can be adjusted within the maximum cross-sectional range of the continuous casting machine, and the spatial range of horizontal movement of the core magnetic pole (4) is limited by the width of the slab (3).

9. The adaptive electromagnetic braking device and system according to claim 4, characterized in that: Symmetrical coils (5), iron core yokes (2), iron core poles (4) and a coil lifting device (6) structure are arranged on both sides of the slab (3) with the central axis of the slab (3) as the symmetry axis.

10. An adaptive electromagnetic braking system, characterized in that: It comprises the adaptive electromagnetic braking device as described in claims 1-9.

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