One-way open type planar electromagnetic heating device guided by E-shaped iron core

Abstract

The utility model relates to an E-shaped iron core guided one-way open type planar electromagnetic heating device, and belongs to the technical field of electromagnetic heating, the E-shaped iron core guided one-way open type planar electromagnetic heating device comprises a plurality of iron core groups which are sequentially arranged in the x-axis direction, each iron core group comprises a coil and an E-shaped iron core, two grooves parallel to the y-axis are formed in one side face, facing the z-axis, of each E-shaped iron core, and the two grooves are communicated with the Y-axis. A wire on one side of the coil penetrates through one groove in the y-axis direction, a wire on the other side of the coil penetrates through the other groove in the y-axis direction, the coil is used for being connected with alternating current, the E-shaped iron core is composed of a plurality of E-shaped iron core units arranged along the y-axis, all the iron core sets are fixedly installed in a fixing frame, and the fixing frame is fixedly connected with the E-shaped iron core units. The grooves are located in the sides, away from the bottom face of the fixing frame, of the E-shaped iron cores. The metal strip heating device has the effects that a metal strip with a large area can be conveniently heated, and the heating quality and the qualified rate of products are improved.

Description

Technical Field

[0001] The present application relates to the field of electromagnetic heating technology, and in particular to a unidirectional open planar electromagnetic heating device guided by an E-shaped iron core. Background Art

[0002] In the field of modern industrial manufacturing, metal materials often need to be heated. During the continuous heat treatment of metal strips (strip-shaped metal materials), the uniformity of heating directly affects the quality and performance of the final product.

[0003] In the existing technology, electromagnetic heating devices usually use a single iron core structure to generate a magnetic field. However, this single iron core structure makes it difficult to ensure uniform temperature distribution in the entire heating area, which may cause a temperature gradient phenomenon when the metal strip passes through the heating area. Especially when heating a large area of ​​metal strip, the existing single iron core cannot meet the requirements of high-quality heating with uniform temperature, which significantly affects the qualification rate of the final product. Utility Model Content

[0004] In order to facilitate the heating of metal strips with a larger area and improve the heating quality and qualified rate of the product, the present application provides a unidirectional open planar electromagnetic heating device guided by an E-shaped iron core.

[0005] The present application provides an E-shaped iron core guided unidirectional open planar electromagnetic heating device adopting the following technical solution:

[0006] A unidirectional open planar electromagnetic heating device guided by an E-shaped iron core comprises several iron core groups arranged in sequence along the x-axis direction, the iron core groups comprising a coil and an E-shaped iron core, two grooves parallel to the y-axis are provided on the E-shaped iron core on the side facing the z-axis, the wire on one side of the coil passes through one of the grooves along the y-axis direction, and the wire on the other side of the coil passes through the other groove along the y-axis direction, the coil is used to connect to alternating current, the E-shaped iron core is composed of several E-shaped iron core units arranged along the y-axis, all the iron core groups are fixedly installed in a fixed frame, and the groove is located on the side of the E-shaped iron core facing away from the bottom surface of the fixed frame.

[0007] By adopting the above technical solution, when the coil is connected to alternating current, an alternating magnetic field is generated inside and outside the coil. The E-shaped iron cores on both sides of the groove guide the magnetic lines of force of the alternating magnetic field so that the magnetic lines of force are perpendicular to the surface of the metal strip. By combining a number of E-shaped iron core units in an array along the x and y axes, a larger magnetic field plane is obtained. The large plane magnetic field heats the metal strip comprehensively and uniformly, thereby facilitating the heating of metal strips over a larger area and greatly reducing the probability of temperature gradients. This effectively improves the heating effect and product quality, reduces product defects caused by uneven heating, and improves product consistency and reliability.

[0008] Preferably, the E-type core unit includes a middle column and two side columns, the middle column is located in the center of a group of side columns, the cross-sectional area of ​​the middle column is twice the cross-sectional area of ​​the side columns, and the groove is the spacing area between the side columns and the middle column.

[0009] By adopting the above technical solution, the magnetic lines of force located in the center of the coil are guided by the middle column, and the magnetic lines of force located outside the coil are guided by the side columns. Since the polarities of the magnetic fields generated inside and outside the coil are opposite, the magnetic lines of force guided by the middle column and the side columns are in opposite directions. Moreover, since the cross-sectional area of ​​the middle column is twice that of the side columns, there are four side columns in the two E-shaped core units arranged along the x-axis on two adjacent core groups. The sum of the cross-sectional areas of the two adjacent side columns is equal to the cross-sectional area of ​​a single middle column, so that the density of the magnetic lines of force guided by the two side columns is similar to that of the magnetic lines of force guided by the middle column, which further makes the magnetic field strength remain relatively consistent in the heating area, thereby improving the uniformity of the magnetic line distribution.

[0010] Preferably, the E-shaped core unit includes two U-shaped cores, which are arranged side by side along the x-axis direction. The U-shaped core includes a connecting portion and two core columns, one of which is perpendicular to one end of the connecting portion, and the other is perpendicular to the other end of the connecting portion.

[0011] By adopting the above technical solution, among all the two core columns of the two parallel U-shaped cores, the two core columns close to each other together constitute the middle column of the E-shaped core unit, and the two core columns far away from each other each serve as the side column of the E-shaped core unit. The combination of the U-shaped core is simple and easy to implement, and the E-shaped core unit can be conveniently constructed, making the manufacturing process of the core more standardized and simplified, and reducing production costs.

[0012] Preferably, a plurality of longitudinal ribs and a plurality of transverse ribs are fixedly arranged in the fixed frame, the longitudinal ribs are arranged along the y-axis direction, and the transverse ribs are arranged along the x-axis direction. The longitudinal ribs and the transverse ribs intersect with each other to form a unit frame opening, the E-type iron core unit corresponds to the unit frame opening one by one, and the E-type iron core unit is installed in the unit frame opening.

[0013] By adopting the above technical solution, the unit frame formed by the intersection of the longitudinal ribs and the transverse ribs provides a stable installation position for the E-type core unit, enhances the stability of the E-type core unit, and enables the E-type core unit to maintain a fixed position and posture during operation, and will not be displaced or deformed due to vibration or other external forces, thereby ensuring the stability and uniformity of the magnetic field distribution, and facilitating the individual maintenance and replacement of each E-type core unit, thereby improving the maintainability and service life of the device.

[0014] Preferably, a recess is provided on the top of the transverse rib for the coil to pass through, and a rivet is fixed in the recess for fixing the U-shaped iron core.

[0015] By adopting the above technical solution, the rivet further enhances the stability of the iron core during operation, preventing the U-shaped iron core from being displaced or shaken due to vibration or magnetic field force.

[0016] Preferably, the rivet includes a fixing plate and a pressing plate, the fixing plate and the pressing plate are integrally formed and perpendicular to each other, the fixing plate is fixedly connected to the transverse rib, and the bottom of the pressing plate is against the connection part of the U-shaped iron core.

[0017] By adopting the above technical solution, the fixed connection between the fixing plate and the transverse rib ensures the stability of the rivet itself, and the bottom of the clamping plate is against the connection part of the U-shaped iron core, which can apply a stable pressure to the U-shaped iron core from above, so that the U-shaped iron core will not jump up and down or move during operation, effectively limiting the activity space of the U-shaped iron core, thereby ensuring the structural stability of the entire iron core group.

[0018] Preferably, the rivet is made of a non-conductive or non-magnetic thin plate.

[0019] By adopting the above technical solution, the use of rivets made of non-conductor or non-magnetic thin plates can effectively avoid interference and influence on the magnetic field, so that the magnetic lines of force preferentially penetrate from the thickness direction of the rib plate, and try to avoid the magnetic lines of force from vertically penetrating the rivet plane over a large area, ensuring the normal distribution of the magnetic field and the conduction of the magnetic lines of force, thereby ensuring the uniformity and stability of heating.

[0020] Preferably, the coil is wound using a hollow high-purity oxygen-free copper tube.

[0021] By adopting the above technical solution, the hollow high-purity oxygen-free copper tube has good electrical conductivity and thermal conductivity, which can reduce the energy loss of the coil during the power-on process and improve the energy conversion efficiency. At the same time, the high-purity oxygen-free copper material can ensure the durability and stability of the coil, reduce the performance degradation caused by factors such as heat and oxidation, and ensure the service life of the coil.

[0022] Preferably, the coil and the E-shaped core unit are bonded and cured with epoxy resin.

[0023] By adopting the above technical solution, epoxy resin bonding and curing can make the coil and the E-type iron core unit tightly combined, enhance the connection stability between the two, reduce the relative displacement caused by vibration or magnetic field force during operation, and help maintain the stability and uniformity of the magnetic field, thereby ensuring the heating effect. At the same time, epoxy resin has good insulation properties, which improves the safety of the device.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. By arranging multiple E-shaped core units and coils arranged in an array along the x and y axes, a large-area magnetic field with relatively uniform magnetic lines of force is formed, so that the magnetic field intensity remains relatively consistent within the heating area, and the metal strip is heated comprehensively and evenly;

[0026] 2. By setting up an E-shaped core unit consisting of two U-shaped cores, the manufacturing process of the E-shaped core unit is simplified, the production cost is reduced, and the stability and maintainability of the device are enhanced;

[0027] 3. By setting rivets, longitudinal ribs and transverse ribs, the stability of the E-type core unit is enhanced, so that the E-type core unit can maintain a fixed position and state during operation and will not be displaced or deformed due to vibration or other external forces, thereby ensuring the stability and uniformity of the magnetic field distribution. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Fig. 1 It is a structural schematic diagram of an E-shaped iron core guided unidirectional open planar electromagnetic heating device provided in an embodiment of the present application.

[0029] Fig. 2 This is an enlarged view of part A in the figure

[0030] Fig. 3 It is a structural schematic diagram of the E-type core unit in an embodiment of the present application.

[0031] Explanation of the accompanying reference numerals: 1. Fixed frame; 11. Longitudinal rib; 12. Transverse rib; 121. Recess; 122. Rivet; 1221. Fixing plate; 1222. Pressing plate; 13. Unit frame opening; 2. E-type core unit; 21. Middle column; 22. Side column; 23. Groove; 3. Core group; 4. Coil; 5. U-type core; 51. Connecting part; 52. Core column. DETAILED DESCRIPTION

[0032] The following is combined with Figs. 1-3 This application is described in further detail.

[0033] The embodiment of the present application discloses a unidirectional open type planar electromagnetic heating device guided by an E-shaped iron core. Figs. 1 to 3, which includes several core groups 3 arranged in sequence along the x-axis direction, and the core group 3 includes a coil 4 and an E-shaped core. Two grooves 23 parallel to the y-axis are provided on the E-shaped core on the side facing the z-axis. The wire on one side of the coil 4 passes through one of the grooves 23 along the y-axis direction, and the wire on the other side of the coil 4 passes through the other groove 23 along the y-axis direction. The coil 4 is used to connect to the alternating current. The E-shaped core is composed of several E-shaped core units 2 arranged along the y-axis. The core groups 3 are all fixedly installed in a fixed frame 1, and the groove 23 is located on the side of the E-shaped core away from the bottom surface of the fixed frame 1. Among them, the coil 4 is wound using a hollow high-purity oxygen-free copper tube, and the coil 4 is wound along the elongated O-shaped direction. The alternating current in the coil 4 can be provided by an IGBT power supply.

[0034] Reference Figs. 1 to 3 When coil 4 is connected to alternating current, an alternating magnetic field is generated inside and outside the coil 4, causing the metal strip to pass over the heating device along the x-axis. The E-shaped cores on either side of the groove guide the magnetic lines of force perpendicular to the metal strip's surface, continuously alternating the direction of these lines of force, heating the strip's surface. Arranging multiple E-shaped core units 2 in an array along the x- and y-axes creates a larger alternating magnetic field plane, enabling comprehensive and uniform heating of a large metal strip surface.

[0035] In order to further improve the uniformity of magnetic field line distribution, refer to Figs. 1 to 3 The E-shaped core unit 2 includes a central column 21 and two side columns 22. The central column 21 is located in the center of a group of side columns 22. The cross-sectional area of ​​the central column 21 is twice that of the side columns 22. The groove 23 is the spacing area between the side columns 22 and the central column 21. The central column 21 and the side columns 22 are both rectangular columns perpendicular to the bottom surface of the fixed frame 1.

[0036] In two adjacent core groups 3, the two E-shaped core units 2 arranged along the x-axis have a total of four side columns 22, where the sum of the cross-sectional areas of two adjacent side columns 22 is equal to the cross-sectional area of ​​a single center column 21. The density of the magnetic lines of force jointly guided by the two side columns 22 is similar to that of the magnetic lines of force guided by a single center column 21, further improving the uniformity of the magnetic line of force distribution.

[0037] In order to facilitate the standardization of the manufacture of the E-type core unit 2, refer to Figs. 1 to 3The E-shaped core unit 2 includes two U-shaped cores 5, and the two U-shaped cores 5 are arranged side by side in the x-axis direction. The U-shaped core 5 includes a connecting portion 51 and two core columns 52, wherein one core column 52 is perpendicular to one end of the connecting portion 51, and the other core column 52 is perpendicular to the other end of the connecting portion 51. The groove 23 is surrounded by the connecting portion 51 and the two core columns 52. Among the four core columns 52 of the two U-shaped cores 5, the two core columns 52 close to each other together constitute the middle column 21 of the E-shaped core unit 2, and the two core columns 52 far away from each other each serve as the side column 22 of the E-shaped core unit 2. The width of the groove 23 (the length on the x-axis) should be 2-2.5 times the width of the core column 52 (the length on the x-axis); the depth of the groove 23 should be 5-10 mm greater than the height of the electromagnetic coil 4.

[0038] In order to ensure the stable installation of the E-type core unit 2 in the fixed frame 1, refer to Fig. 1 and Fig. 2 Several longitudinal ribs 11 and transverse ribs 12 are fixedly mounted within the fixed frame 1. The longitudinal ribs 11 are arranged along the y-axis, and the transverse ribs 12 are arranged along the x-axis. The longitudinal ribs 11 and transverse ribs 12 are integrally connected to the fixed frame 1 through welding and riveting. The longitudinal ribs 11 and transverse ribs 12 intersect to form a unit frame opening 13. The E-core units 2 correspond to the unit frame opening 13 one-to-one and are installed within the unit frame opening 13.

[0039] Reference Fig. 1 and Fig. 2 A recess 121 is provided on the top of the transverse rib 12 for the coil 4 to pass through, and a rivet 122 is fixed on the recess 121. The rivet 122 is used to fix the U-shaped core 5. The rivet 122 includes a fixing plate 1221 and a pressing plate 1222. The fixing plate 1221 and the pressing plate 1222 are integrally formed and perpendicular to each other. The fixing plate 1221 is riveted to the transverse rib 12, and the bottom of the pressing plate 1222 abuts against the upper side of the connecting portion 51 of the U-shaped core 5, pressing the U-shaped core 5 into the fixed frame 1. The rivet 122 is made of a non-conductive or non-magnetic thin plate, such as an engineering plastic or a ceramic thin plate. The coil 4 and the E-shaped core unit 2 are bonded and cured with epoxy resin.

[0040] The implementation principle of the unidirectional open planar electromagnetic heating device guided by an E-type iron core in the embodiment of the present application is as follows: an E-type iron core unit 2 is formed by two parallel U-type iron cores 5. A plurality of E-type iron core units 2 arranged along the y-axis and a coil 4 are used to form an iron core group 3, and then a plurality of iron core groups 3 arranged along the x-axis are laid together to form a large-area magnetic field. When in use, all coils 4 are connected to an alternating current, and an alternating magnetic field is generated inside and outside the coil 4. The middle column 21 guides the magnetic lines of force inside the coil 4, and the side columns 22 guide the magnetic lines of force outside the coil 4. In two adjacent iron core groups 3, the side columns 22 of one E-type iron core unit 2 are offset against the side columns 22 of another E-type iron core unit 2, and the sum of the cross-sectional areas of the two offset side columns 22 is equal to the cross-sectional area of ​​a single middle column 21. The density of the magnetic lines of force guided by the two side columns 22 and the one middle column 21 is similar, which improves the uniformity of the distribution of the magnetic lines of force in the heating area.

[0041] A uniform planar magnetic field is formed directly above the core assembly 3. The metal strip passes through this planar magnetic field parallel to the x-axis. The magnetic lines of force pass perpendicularly through the surface of the metal strip and continuously alternate, heating it comprehensively and evenly, significantly reducing the probability of temperature gradients. This effectively improves heating efficiency and product quality, alleviates the problem of uneven heating over large surfaces, reduces product defects caused by uneven heating, and improves product consistency and reliability.

[0042] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An E-shaped iron core guided unidirectional open type planar electromagnetic heating device, characterized in that: The invention comprises a plurality of core groups (3) arranged in sequence along the x-axis direction, wherein the core group (3) comprises a coil (4) and an E-shaped core, wherein two grooves (23) parallel to the y-axis are provided on the E-shaped core on a side surface facing the z-axis, wherein a conductor on one side of the coil (4) passes through one of the grooves (23) along the y-axis direction, and a conductor on the other side of the coil (4) passes through the other groove (23) along the y-axis direction, wherein the coil (4) is used for receiving alternating current, and wherein the E-shaped core comprises a plurality of E-shaped core units (2) arranged along the y-axis, and wherein all the core groups (3) are fixedly mounted in a fixed frame (1), and wherein the grooves (23) are located on the side of the E-shaped core facing away from the bottom surface of the fixed frame (1).

2. The E-shaped iron core guided unidirectional open planar electromagnetic heating device according to claim 1, characterized in that: The E-shaped iron core unit (2) comprises a central column (21) and two side columns (22), wherein the central column (21) is located at the center of a group of side columns (22), the cross-sectional area of ​​the central column (21) is twice the cross-sectional area of ​​the side columns (22), and the groove (23) is the spacing area between the side columns (22) and the central column (21).

3. The E-shaped iron core guided unidirectional open planar electromagnetic heating device according to claim 1, characterized in that: The E-shaped iron core unit (2) includes two U-shaped iron cores (5), the two U-shaped iron cores (5) are arranged side by side along the x-axis direction, and each U-shaped iron core (5) includes a connecting portion (51) and two iron core columns (52), wherein one of the iron core columns (52) is perpendicular to one end of the connecting portion (51), and the other of the iron core columns (52) is perpendicular to the other end of the connecting portion (51).

4. The E-shaped iron core guided unidirectional open planar electromagnetic heating device according to claim 3, characterized in that: A plurality of longitudinal ribs (11) and a plurality of transverse ribs (12) are fixedly arranged in the fixed frame (1), wherein the longitudinal ribs (11) are arranged along the y-axis direction, and the transverse ribs (12) are arranged along the x-axis direction. The longitudinal ribs (11) and the transverse ribs (12) intersect with each other to form a unit frame opening (13), and the E-type iron core unit (2) corresponds to the unit frame opening (13) one by one, and the E-type iron core unit (2) is installed in the unit frame opening (13).

5. The E-shaped iron core guided unidirectional open planar electromagnetic heating device according to claim 4, characterized in that: A recess (121) for the coil (4) to pass through is provided on the top of the transverse rib plate (12), and a rivet (122) is fixedly provided in the recess (121), and the rivet (122) is used to fix the U-shaped iron core (5).

6. The E-shaped iron core guided unidirectional open planar electromagnetic heating device according to claim 5, characterized in that: The rivet (122) comprises a fixing piece (1221) and a pressing piece (1222); the fixing piece (1221) and the pressing piece (1222) are integrally formed and perpendicular to each other; the fixing piece (1221) is fixedly connected to the transverse rib (12); and the bottom of the pressing piece (1222) abuts against the connecting portion (51) of the U-shaped iron core (5).

7. The E-shaped iron core guided unidirectional open planar electromagnetic heating device according to claim 6, characterized in that: The rivet (122) is made of a non-conductive or non-magnetic thin plate.

8. The E-shaped iron core guided unidirectional open planar electromagnetic heating device according to claim 1, characterized in that: The coil (4) is wound using a hollow high-purity oxygen-free copper tube.

9. The E-shaped iron core guided unidirectional open planar electromagnetic heating device according to claim 1, characterized in that: The coil (4) and the E-shaped iron core unit (2) are bonded and cured using epoxy resin.

Images