Enclosed planar electromagnetic heating device guided by E-shaped iron core

Abstract

The invention relates to an E-shaped iron core guided closed type planar electromagnetic heating device, and relates to the technical field of electromagnetic heating, the E-shaped iron core guided closed type planar electromagnetic heating device comprises a base and a mounting seat, a heating area is reserved between the base and the mounting seat, and a magnetic field assembly is fixedly arranged on the base; the magnetic field assembly is used for generating a plurality of first alternating magnetic fields and second alternating magnetic fields in a heating area, the first alternating magnetic fields and the second alternating magnetic fields are sequentially alternated in the length direction of the base, and magnetic lines of the first alternating magnetic fields and the second alternating magnetic fields are parallel to the height direction of the base and are opposite in direction; and a guide assembly is fixedly arranged on the mounting seat and is used for changing the directions of magnetic lines of the first alternating magnetic field and the second alternating magnetic field and collecting the magnetic lines of the first alternating magnetic field and the second alternating magnetic field in a heating area. The heating device has the effects of reducing the heat loss degree, improving the energy efficiency and ensuring the heating effect when the metal strip is heated.

Description

Technical Field

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

[0002] In the field of modern industrial manufacturing, especially in applications involving heat treatment of metal materials, uniform heating is crucial to product quality. For example, in the continuous heat treatment process of metal strips, the uniformity of heating directly affects the quality and performance of the final product. At present, the commonly used continuous heating equipment mainly includes resistance furnaces, gas heating furnaces and electromagnetic heating devices.

[0003] Traditional electromagnetic heating devices usually adopt an open structure, using the magnetic effect of electric current to generate an alternating planar magnetic field. The metal strip is placed in this planar magnetic field. The magnetic lines of force in the planar magnetic field are perpendicular to the surface of the metal strip and continuously alternate, thereby heating the metal strip.

[0004] However, although the traditional open structure electromagnetic heating device can achieve basic heating functions, the magnetic lines are easy to diverge, the energy consumption increases, resulting in heat loss, reduced energy efficiency, and affecting the heating effect. Summary of the invention

[0005] In order to reduce the degree of heat loss, improve energy efficiency and ensure the heating effect when heating a metal strip, the present application provides an E-shaped iron core guided closed planar electromagnetic heating device.

[0006] The present application provides an E-shaped iron core guided closed planar electromagnetic heating device adopts the following technical solution: A closed planar electromagnetic heating device guided by an E-shaped iron core comprises a base and a mounting seat, wherein the mounting seat is located above the base, a heating area is reserved between the base and the mounting seat, a magnetic field assembly is fixedly arranged on the base, the magnetic field assembly is used to generate a plurality of first alternating magnetic fields and second alternating magnetic fields in the heating area, the first alternating magnetic fields and the second alternating magnetic fields are alternated in sequence along the length direction of the base, the magnetic lines of force of the first alternating magnetic field and the second alternating magnetic field are parallel to the height direction of the base and in opposite directions; a guiding assembly is fixedly arranged on the mounting seat, the guiding assembly is used to change the direction of the magnetic lines of force of the first alternating magnetic field and the second alternating magnetic field, and converge the magnetic lines of force of the first alternating magnetic field and the second alternating magnetic field in the heating area.

[0007] By adopting the above technical solution, when the metal strip moves between the base and the mounting seat, under the action of electromagnetic induction, the continuously alternating magnetic lines of force of the first alternating magnetic field and the second alternating magnetic field heat the metal strip; because the magnetic lines of force of the first alternating magnetic field and the second alternating magnetic field are parallel to the height direction of the base and in opposite directions, at the same time, if the magnetic lines of force of the first alternating magnetic field point toward the guide component, the magnetic lines of force of the second alternating magnetic field point away from the guide component; after the magnetic lines of force of the first alternating magnetic field pass through the metal strip, they are affected by the guide component on the other side of the metal strip, and the guide component changes. The direction of the magnetic force lines of the first alternating magnetic field is changed, and the magnetic force lines of the first alternating magnetic field point away from the original magnetic force line position in the guide component, and the first alternating magnetic field and the second alternating magnetic field are alternated in sequence along the length direction of the base, so the magnetic force lines away from the original position point toward the adjacent second alternating magnetic field, and the magnetic force lines of the second alternating magnetic field point away from the guide component, and the second alternating magnetic field guides the first alternating magnetic field in the guide component, so that the magnetic force lines of the first alternating magnetic field are redirected toward the metal strip, reducing the divergence of the magnetic force lines, making the heating more concentrated and efficient, thereby reducing heat loss, improving energy efficiency, and ensuring the heating effect.

[0008] Preferably, the magnetic field components are in two groups, one of which is fixedly disposed on the base, and the other is fixedly disposed on the mounting seat as a guide component, and the two magnetic field components are symmetrical to each other.

[0009] By adopting the above technical solution, the alternating magnetic fields of the two magnetic field components affect each other, thereby changing the direction of the magnetic lines of force. The symmetrically arranged magnetic field components can make the magnetic field on both sides of the metal strip more uniform, further ensuring the uniformity of heating and improving product quality.

[0010] Preferably, the magnetic field assembly includes a plurality of core groups arranged in sequence along the length direction of the base, the core groups include a coil and an E-shaped core, two grooves are provided on the E-shaped core on one side surface in the height direction toward the base, the two grooves are opened in a direction parallel to the width of the base, the wire on one side of the coil passes through one of the grooves along the width direction of the base, and the wire on the other side of the coil passes through the other groove along the width direction of the base, the coil is used to connect to alternating current, the E-shaped core is composed of a plurality of E-shaped core units arranged along the width direction of the base, all the core groups are fixedly installed in a fixed frame, and the groove is located on the side of the E-shaped core away from the bottom surface of the fixed frame.

[0011] By adopting the above technical solution, when the coil is connected to alternating current, an alternating magnetic field will be generated inside and outside the coil. At this time, the grooves guide the magnetic lines of force of the alternating magnetic field respectively. If the E-type iron core between the two grooves guides the first alternating magnetic field, then the E-type iron core outside the two grooves guides the second alternating magnetic field. Since the directions of the magnetic lines of force inside and outside the coil are opposite, the first alternating magnetic field and the second alternating magnetic field with opposite directions of the magnetic lines of force are formed.

[0012] Preferably, the E-type core unit includes two U-type cores, which are arranged side by side in the length direction of the base, and the U-type core includes a connecting part and two core columns, one of which is perpendicular to one end of the connecting part, and the other is perpendicular to the other end of the connecting part; the two core columns located in the center of the E-type core unit together constitute a middle column, and the two core columns located on both sides of the E-type core unit each serve as a side column, and the middle column is located in the center of the coil.

[0013] By adopting the above technical scheme, in two parallel U-shaped cores, the two core columns close to each other jointly constitute the middle column of the E-shaped core unit, and the two core columns far away from each other serve as side columns of the E-shaped core unit respectively. This combination of U-shaped cores is simple and easy to operate, and can conveniently construct an E-shaped core unit. The middle column is composed of two core columns, and the side columns are composed of a single core column. The core groups are also arranged in sequence along the length direction of the base. On adjacent core groups, the two side columns and the middle column close to each other are both composed of two core columns, and the cross-sectional areas of the two side columns and the middle column are equal. The magnetic line densities of the correspondingly guided first alternating magnetic field and the second alternating magnetic field are close, ensuring that the magnetic field strengths of the first alternating magnetic field and the second alternating magnetic field are consistent.

[0014] Preferably, the E-shaped core has chamfers or rounded corners on both side surfaces in the width direction of the base at the edges away from the fixed frame, and the coil is bent toward the bottom surface of the fixed frame at both ends in the width direction of the base.

[0015] By adopting the above technical solution, the chamfer or rounded corners can alleviate the problem of the E-type iron core having too dense magnetic lines of force at the tips of the two side surfaces in the width direction of the base, and try to prevent the magnetic lines of force from being too dense and causing the iron core to overheat; and the magnetic lines of force at the ends of the coil are usually denser. By raising the two sides of the coil, the magnetic lines of force in the end area of ​​the coil can be made relatively sparse, thereby making the magnetic lines of force in the planar magnetic field more evenly distributed.

[0016] Preferably, the guide assembly comprises a guide core, and the guide core is a straight plate made of iron.

[0017] By adopting the above technical solution, the guiding core structure of the straight strip plate is simple and can effectively guide the magnetic lines of force, thereby changing the direction of the magnetic lines of force.

[0018] Preferably, the mounting seat can move in a direction approaching or away from the base, and a centering component is provided on the base and the mounting seat, and the centering component is used to support the metal strip in the center of the base and the mounting seat.

[0019] By adopting the above technical solution, the distance between the mounting seat and the base can be adjusted according to the thickness of the metal strip. The centering component ensures that the metal strip is always in the best heating position during the heating process, thereby improving the uniformity and stability of the heating.

[0020] Preferably, the centering assembly includes a first rack, a second rack, a center gear, and a clamping member. The first rack is fixed at the four corners of the base in the direction toward the mounting seat, and the second rack is fixed at the four corners of the base in the direction toward the base. The first rack corresponds to the second rack one by one, and one center gear is provided between each group of corresponding first racks and second racks. The center gear is meshed with the first rack and the second rack at the same time. The center of the center gear is located in the center of the base and the mounting seat, and the axis of the center gear is parallel to the width direction of the base. The four center gears are divided into two pairs, and the axis of each pair of center gears coincides. The clamping member is provided on each pair of center gears, and the clamping member is used to clamp metal strips.

[0021] By adopting the above technical solution, when the base and the mounting seat are close to or away from each other, since the center gear is meshed with the first rack and the second rack at the same time, the center of the center gear can always be located in the center of the two magnetic field components. The clamping parts on the center gear clamp the two side surfaces of the metal strip, thereby ensuring that the metal strip is located on the symmetrical center plane of the two magnetic field components, achieving precise centering of the metal strip, and ensuring that the metal strip is evenly heated in the magnetic field.

[0022] Preferably, the clamping member includes a mounting frame, a first gear, a second gear, an upper clamping rod, a lower clamping rod, and a clamping shaft. The mounting frame rotates and slides with the axis of the center gear. The first gear and the second gear are both rotatably arranged on the mounting frame. The first gear and the second gear are arranged in the height direction of the base. The first gear and the second gear are at equal distances from the axis of the center gear. The first gear and the second gear have the same number of teeth and are meshed with each other. The upper clamping rod is fixedly connected to the first gear, and the lower clamping rod is fixedly connected to the second gear. The upper clamping rod and the lower clamping rod have equal lengths and opposite inclination directions. Two clamping shafts are provided, one of which is hinged to the two upper clamping rods at the same time, and the other clamping shaft is hinged to the two lower clamping rods at the same time.

[0023] By adopting the above technical solution, since the first gear and the second gear are meshed with each other and have the same number of teeth, the upper clamping rod and the lower clamping rod can rotate synchronously in opposite directions, and the two clamping shafts are respectively hinged to the upper clamping rod and the lower clamping rod, and the clamping shaft connected to the upper clamping rod presses against the upper surface of the metal strip, and the clamping shaft connected to the lower clamping rod presses against the lower surface of the metal strip, thereby achieving stable clamping of the metal strip, and since the clamping parts are provided on each set of central gears, the two pairs of clamping rods act at the same time, and no matter how the thickness of the metal strip changes, the metal strip is always located in the center of the base and the mounting seat.

[0024] Preferably, the centering assembly further comprises a sleeve housing, the central gear is rotatably disposed in the sleeve housing, and the first gear and the second rack are both slidably engaged with the sleeve housing.

[0025] By adopting the above technical solution, the setting of the housing can protect the central gear, the first gear and the second rack, reduce the interference of external factors on their operation, and also help maintain the structural stability and working reliability of the entire centering assembly.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting the magnetic field component and the guide component, when the metal strip is located between the base and the mounting seat, the alternating magnetic field generated by the magnetic field component can heat the metal strip, and the guide component can guide the magnetic lines of force, reduce the divergence of the magnetic lines of force, and make the heating more concentrated and efficient, thereby reducing the degree of heat loss when heating the metal strip, improving energy efficiency, and ensuring the heating effect; 2. By arranging a plurality of E-shaped core units and coils arranged in a row along the X and Y axis directions, a uniform large-area magnetic field is formed, so that the magnetic field strength remains relatively consistent in the heating area, and the first alternating magnetic field and the second alternating magnetic field of the frame are sequentially arranged; 3. By setting the first rack, the second rack, the center gear and the clamping member, metal strips of different widths can be stably clamped to ensure that the metal strips can be located on the symmetrical center plane of the two magnetic field components, thereby ensuring smooth transportation of the metal strips and improving the versatility and production efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of an E-type iron core-guided closed planar electromagnetic heating device provided in Example 1 of the present application.

[0028] Figure 2 It is a schematic diagram of the structure of the magnetic field component in Example 1 of the present application.

[0029] Figure 3 It is a schematic diagram of the structure of the core group in Example 1 of the present application.

[0030] Figure 4It is a structural schematic diagram of the E-type core unit in Example 1 of the present application.

[0031] Figure 5 It is a schematic diagram of the direction of magnetic lines of force in Example 1 of the present application.

[0032] Figure 6 It is a structural schematic diagram of an E-type iron core-guided closed planar electromagnetic heating device provided in Example 2 of the present application.

[0033] Figure 7 It is a schematic diagram of the direction of magnetic lines of force in Example 3 of the present application.

[0034] Explanation of the reference numerals in the accompanying drawings: 1. base; 2. mounting seat; 3. fixing frame; 31. core group; 32. E-type core unit; 321. middle column; 322. side column; 323. groove; 324. chamfer or fillet; 325. U-shaped core; 3251. core column; 3252. connecting part; 33. coil; 34. IGBT power supply; 4. centering assembly; 41. first rack; 42. second rack; 43. center gear; 44. mounting frame; 441. first gear; 4411. upper clamping rod; 442. second gear; 4421. lower clamping rod; 443. clamping shaft; 4431. clamping roller; 45. casing; 5. metal strip; 6. guide core; 7. first alternating magnetic field; 8. second alternating magnetic field. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-7 This application is described in further detail.

[0036] Embodiment 1: The present application embodiment discloses a closed planar electromagnetic heating device guided by an E-shaped iron core. Figures 1 to 5 , which includes a base 1 and a mounting seat 2, wherein the mounting seat 2 is located above the base 1, and a heating area is left between the base 1 and the mounting seat 2. A magnetic field component is fixedly arranged on the base 1, and the magnetic field component is used to generate a plurality of first alternating magnetic fields 7 and second alternating magnetic fields 8 in the heating area. The first alternating magnetic field 7 and the second alternating magnetic field 8 are alternated in sequence along the length direction of the base 1, and the magnetic lines of force of the first alternating magnetic field 7 and the second alternating magnetic field 8 are parallel to the height direction of the base 1 and in opposite directions. A guiding component is fixedly arranged on the mounting seat 2, and the guiding component is used to change the direction of the magnetic lines of force of the first alternating magnetic field 7 and the second alternating magnetic field 8, and converge the first alternating magnetic field 7 and the second alternating magnetic field 8 in the heating area. When the metal strip 5 moves between the base 1 and the mounting seat 2 along the length direction of the base 1, under the action of electromagnetic induction, the continuously alternating magnetic lines of force of the first alternating magnetic field 7 and the second alternating magnetic field 8 heat the metal strip 5.

[0037] Reference Figure 5, at the same time, if the magnetic lines of force of the first alternating magnetic field 7 point toward the guide assembly, the magnetic lines of force of the second alternating magnetic field 8 point away from the guide assembly. After the magnetic lines of force of the first alternating magnetic field 7 pass through the metal strip 5, they are affected by the guide assembly on the other side of the metal strip 5, and the guide assembly changes the direction of the magnetic lines of force of the first alternating magnetic field 7. The magnetic lines of force of the first alternating magnetic field 7 point away from the original magnetic lines of force in the guide assembly, and point toward the adjacent second alternating magnetic field 8. Since the magnetic lines of force of the second alternating magnetic field 8 point away from the guide assembly, the second alternating magnetic field 8 guides the magnetic lines of force of the first alternating magnetic field 7 in the guide assembly to change direction, so that the magnetic lines of force of the first alternating magnetic field 7 are directed back toward the metal strip 5, reducing the divergence of the magnetic lines of force.

[0038] Reference Figure 1 and Figure 5 In this embodiment, there are two groups of magnetic field components, one of which is fixedly arranged on the upper surface of the base 1, and the other is fixedly arranged on the lower surface of the mounting seat 2 as a guide component. The two magnetic field components are symmetrical to each other, and the metal strip 5 is located on the symmetric center plane of the two magnetic field components. It should be noted that at the same time, on the same straight line perpendicular to the surface of the metal strip 5 (i.e., the height direction of the base 1), the magnetic lines of force of the magnetic field components on both sides of the metal strip 5 are in the same direction; that is, on any straight line perpendicular to the surface of the metal strip 5, if the magnetic lines of force of the magnetic field generated by the magnetic field component on the base 1 point to the metal strip 5, the magnetic lines of force of the magnetic field generated by the magnetic field component on the mounting seat 2 should be away from the metal strip 5.

[0039] In order to facilitate the generation of the first alternating magnetic field 7 and the second alternating magnetic field 8 with magnetic lines of force parallel to each other and in opposite directions, refer to Figure 2 and Figure 3 The magnetic field assembly includes a plurality of core groups 31 arranged in sequence along the length direction of the base 1. The core group 31 includes a coil 33 and an E-shaped core. Two grooves 323 are provided on the E-shaped core on one side of the surface facing the height direction of the base 1. The grooves 323 are rectangular square grooves. The two grooves 323 are provided in parallel with the width direction of the base 1. The wire on one side of the coil 33 passes through one of the grooves 323 along the width direction of the base 1, and the wire on the other side of the coil 33 passes through the other groove 323 along the width direction of the base 1.

[0040] Reference Figure 2 and Figure 3, the coil 33 is used to access the alternating current, the E-type core is composed of a plurality of E-type core units 32 arranged along the width direction of the base 1, all the core groups 31 are fixedly mounted in a fixed frame 3, the groove 323 is located on the side of the E-type core away from the bottom surface of the fixed frame 3, and the fixed frame 3 is fixed on the upper surface of the base 1 and the lower surface of the mounting seat 2. An IGBT power supply 34 is arranged on the fixed frame 3, and the IGBT power supply 34 is used to provide alternating current for the coil 33. The coil 33 is wound using a hollow high-purity oxygen-free copper tube, and the coil 33 is wound along the elongated O-shaped direction. The specifications and number of turns of the coil 33 are based on the process strength of the required magnetic field.

[0041] Reference Figure 2 and Figure 3 The E-type core unit 32 includes two U-type cores 325, which are arranged in parallel in the length direction of the base 1. The U-type core 325 includes a connecting portion 3252 and two core columns 3251, wherein one core column 3251 is perpendicular to one end of the connecting portion 3252, and the other core column 3251 is perpendicular to the other end of the connecting portion 3252. The two core columns 3251 located in the center of the E-type core unit 32 together constitute a middle column 321, and the two core columns 3251 located on both sides of the E-type core unit 32 are each used as a side column 322, and the middle column 321 is located in the center of the coil 33. In this embodiment, the middle column 321 is used to guide the first alternating magnetic field 7, and the side column 322 is used to guide the second alternating magnetic field 8.

[0042] Reference Figure 2 and Figure 3 The E-shaped iron core has chamfers or fillets 324 at both ends of the base 1 in the width direction on the edges and corners facing away from the fixed frame 3. The coil 33 is bent toward the bottom surface of the fixed frame 3 at both ends of the base 1 in the width direction. The curvature radius of the bend needs to be adapted to the width of the magnetic field and the shape of the material passing through the magnetic field. The coil 33 and the E-shaped iron core unit are bonded and fixed with epoxy resin or a material with the same performance.

[0043] The implementation principle of the closed planar electromagnetic heating device guided by an E-shaped iron core in the embodiment of the present application is as follows: start the IGBT power supply 34, provide alternating current to the coil 33, and the coil 33 generates an alternating magnetic field. The metal strip 5 moves between the base 1 and the mounting seat 2 along the length direction of the base 1, and the continuously alternating magnetic lines of force of the first alternating magnetic field 7 and the second alternating magnetic field 8 heat the metal strip 5. At the same time, the middle column 321 on the base 1 guides the first alternating magnetic field 7 toward the metal strip 5. After the first alternating magnetic field 7 passes through the metal strip 5, it is guided by the middle column 321 of the mounting seat 2, and the direction of the magnetic lines of force is changed along the connection part 3252 of the U-shaped iron core at the bottom of the mounting seat 2. Finally, the magnetic lines of force are guided by the side column 322 on the mounting seat 2 and directed toward the metal strip 5 again. In this way, the magnetic field components on both sides of the metal strip 5 guide each other, the magnetic lines of force are not easy to diverge, and the magnetic lines of force of the alternating magnetic field are converged in the heating area, so that when the metal strip 5 is heated, the degree of heat loss can be reduced, the energy efficiency can be improved, and a good heating effect can be ensured.

[0044] Embodiment 2: On the basis of Example 1, in order to adapt to metal strips 5 of different thicknesses, refer to Figure 1 and Figure 6 The upper surface of the base 1 is vertically and fixedly provided with a cylinder, the output end of which is fixedly connected to the mounting seat 2, and the cylinder can drive the base 1 and the mounting seat 2 to move closer to or farther from each other. The base 1 and the mounting seat 2 are provided with a centering component 4, which is used to support the metal strip 5 in the center of the base 1 and the mounting seat 2.

[0045] Reference Figure 1 and Figure 6 The centering component 4 includes a first rack 41, a second rack 42, a center gear 43, and a clamping member. The first rack 41 is fixedly arranged at the four corners of the base 1 in the direction toward the mounting seat 2, and the second rack 42 is fixedly arranged at the four corners of the base 1 in the direction toward the base 1. The first rack 41 and the second rack 42 correspond to each other one by one. A center gear 43 is arranged between each group of corresponding first racks 41 and second racks 42. The center gear 43 is meshed with the first rack 41 and the second rack 42 at the same time. The center of the center gear 43 is located in the center of the base 1 and the mounting seat 2. The axis of the center gear 43 is parallel to the width direction of the base 1. The four center gears 43 are divided into two pairs, and the axis of each pair of center gears 43 coincides. A clamping member is arranged on each pair of center gears 43, and the clamping member is used to clamp the metal strip 5.

[0046] Reference Figure 6The clamping member includes a mounting frame 44, a first gear 441, a second gear 442, an upper clamping rod 4411, a lower clamping rod 4421, a clamping shaft 443, and a clamping roller 4431. The mounting frame 44 rotates and slides with the axis of the central gear 43. The first gear 441 and the second gear 442 are both rotatably arranged on the mounting frame 44. The first gear 441 and the second gear 442 are arranged in the height direction of the base 1. The first gear 441 and the second gear 442 are arranged to the central gear 4 3, the distance between the axes is equal, the number of teeth of the first gear 441 and the second gear 442 is equal and they mesh with each other, the upper clamping rod 4411 is fixedly connected to the first gear 441, the lower clamping rod 4421 is fixedly connected to the second gear 442, the upper clamping rod 4411 and the lower clamping rod 4421 are equal in length and inclined in opposite directions, two clamping shafts 443 are provided, one of which is hinged to the two upper clamping rods 4411 at the same time, and the other clamping shaft 443 is hinged to the two lower clamping rods 4421 at the same time. The clamping roller 4431 is rotatably arranged on the clamping shaft 443, and the circumference of the clamping roller 4431 abuts against the surface of the metal strip 5. Torsion springs are provided on the first gear 441 and the second gear 442, and the torsion springs drive the upper clamping rod 4411 and the lower clamping rod 4421 to approach each other. The centering assembly 4 further includes a sleeve 45 , in which the central gear 43 is rotatably disposed, and the first gear 441 and the second rack 42 are both slidably matched with the sleeve 45 .

[0047] The implementation principle of the closed planar electromagnetic heating device guided by an E-shaped iron core in the embodiment of the present application is as follows: before heating the metal strip 5, the spacing between the base 1 and the mounting seat 2 is first adjusted according to the thickness of the metal strip 5. The cylinder is controlled to move, and the mounting seat 2 is driven to approach or move away from the base 1. The center gear 43 is meshed with the first rack 41 and the second rack 42 at the same time, and the center of the center gear 43 can always be located on the symmetrical center plane of the two magnetic field components. Since the first gear 441 and the second gear 442 are meshed with each other and have the same number of teeth, the upper clamping rod 4411 and the lower clamping rod 4421 can rotate synchronously in opposite directions. The distances between the two clamping shafts 443 and the symmetrical center planes of the two magnetic field components are always the same. Under the action of the torsion spring, one of the clamping shafts 443 is against the upper surface of the metal strip 5 through the clamping roller 4431, and the other clamping shaft 443 is against the lower surface of the metal strip 5 through the clamping roller 4431, thereby achieving stable clamping of the metal strip 5.

[0048] Embodiment 3: The difference between this embodiment and embodiment 1 is: Figure 7 The guide assembly includes a guide core 6, which is a straight strip made of iron. The guide core 6 is fixedly mounted on the surface of the mounting seat 2 facing the base 1. It is ensured that the magnetic lines of force of the first alternating magnetic field 7 and the second alternating magnetic field 8 pass through the guide core 6 vertically.

[0049] The implementation principle of the closed planar electromagnetic heating device guided by an E-type iron core in the embodiment of the present application is as follows: at the same time, the magnetic force lines of the first alternating magnetic field 7 guided by the middle column 321 on the base 1 penetrate the metal strip 5 and are guided by the guiding iron core 6, and the direction of the magnetic force lines is changed along the guiding iron core 6, and the magnetic force lines of the first alternating magnetic field 7 in the guiding iron core 6 move horizontally toward the second alternating magnetic field 8, and are affected by the second alternating magnetic field 8 guided by the two side columns 322, and move toward the metal strip 5 together with the magnetic force lines of the second alternating magnetic field 8. In this way, the magnetic force lines between the guiding iron core 6 and the E-type iron core unit 32 are closed to form a closed loop, reducing the loss of magnetic force lines, ensuring the high efficiency of the heating effect, reducing the degree of heat loss, improving energy efficiency, and ensuring the heating effect.

[0050] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An E-shaped iron core guided closed planar electromagnetic heating device, characterized in that: The invention comprises a base (1) and a mounting seat (2), wherein the mounting seat (2) is located above the base (1), a heating area is reserved between the base (1) and the mounting seat (2), a magnetic field component is fixedly arranged on the base (1), and the magnetic field component is used to generate a plurality of first alternating magnetic fields (7) and second alternating magnetic fields (8) in the heating area, the first alternating magnetic fields (7) and the second alternating magnetic fields (8) are alternated in sequence along the length direction of the base (1), and the magnetic lines of force of the first alternating magnetic field (7) and the second alternating magnetic field (8) are parallel to the height direction of the base (1) and have opposite directions; and a guiding component is fixedly arranged on the mounting seat (2), and the guiding component is used to change the direction of the magnetic lines of force of the first alternating magnetic field (7) and the second alternating magnetic field (8), and converge the magnetic lines of force of the first alternating magnetic field (7) and the second alternating magnetic field (8) in the heating area.

2. The E-shaped iron core guided closed planar electromagnetic heating device according to claim 1, characterized in that: The magnetic field components are divided into two groups, one of which is fixedly arranged on the base (1), and the other of which is fixedly arranged on the mounting seat (2) as a guide component, and the two magnetic field components are symmetrical to each other.

3. The E-shaped iron core guided closed planar electromagnetic heating device according to claim 1, characterized in that: The magnetic field component comprises a plurality of core groups (31) arranged in sequence along the length direction of the base (1), the core group (31) comprising a coil (33) and an E-shaped core, two grooves (323) are provided on a side surface of the E-shaped core in the height direction facing the base (1), the two grooves (323) are provided in a direction parallel to the width direction of the base (1), the conductive wire on one side of the coil (33) passes through one of the grooves (323) along the width direction of the base (1), and the conductive wire on the other side of the coil (33) passes through the other groove (323) along the width direction of the base (1), the coil (33) is used to connect to alternating current, the E-shaped core is composed of a plurality of E-shaped core units (32) arranged along the width direction of the base (1), all the core groups (31) are fixedly mounted in a fixed frame (3), and the grooves (323) are located on the side of the E-shaped core away from the bottom surface of the fixed frame (3).

4. The E-shaped iron core guided closed planar electromagnetic heating device according to claim 3, characterized in that: The E-shaped iron core unit (32) comprises two U-shaped iron cores (325), the two U-shaped iron cores (325) are arranged side by side in the length direction of the base (1), the U-shaped iron core (325) comprises a connecting portion (3252) and two iron core columns (3251), wherein one of the iron core columns (3251) is perpendicular to one end of the connecting portion (3252), and the other of the iron core columns (3251) is perpendicular to the other end of the connecting portion (3252); the two iron core columns (3251) located in the center of the E-shaped iron core unit (32) together constitute a middle column (321), and the two iron core columns (3251) located on both sides of the E-shaped iron core unit (32) each serve as a side column (322), and the middle column (321) is located in the center of the coil (33).

5. The E-shaped iron core guided closed planar electromagnetic heating device according to claim 3, characterized in that: The E-shaped iron core is provided with chamfers or rounded corners (324) at both ends of the base (1) in the width direction, on the edges and corners facing away from the fixed frame (3); and the coil (33) is bent at both ends of the base (1) in the width direction towards the bottom surface of the fixed frame (3).

6. The E-shaped iron core guided closed planar electromagnetic heating device according to claim 1, characterized in that: The guide assembly comprises a guide core, and the guide core is a straight strip made of iron.

7. The E-shaped iron core guided closed planar electromagnetic heating device according to claim 1, characterized in that: The mounting seat (2) can move in a direction approaching or moving away from the base (1), and a centering component (4) is provided on the base (1) and the mounting seat (2). The centering component (4) is used to support the metal strip (5) in the center of the base (1) and the mounting seat (2).

8. The E-shaped iron core guided closed planar electromagnetic heating device according to claim 7, characterized in that: The centering assembly (4) comprises a first rack (41), a second rack (42), a central gear (43), and a clamping member. The first rack (41) is fixedly arranged at the four corners of the base (1) in a direction toward the mounting seat (2). The second rack (42) is fixedly arranged at the four corners of the base (1) in a direction toward the base (1). The first rack (41) and the second rack (42) correspond to each other one by one. The central gear (43) is respectively arranged between each set of corresponding first racks (41) and second racks (42). There is one, the central gear (43) is meshed with the first rack (41) and the second rack (42) at the same time, the center of the central gear (43) is located in the center of the base (1) and the mounting seat (2), the axis of the central gear (43) is parallel to the width direction of the base (1), the four central gears (43) are divided into two pairs, the axes of each pair of central gears (43) coincide, and the clamping member is provided on each pair of central gears (43), and the clamping member is used to clamp the metal strip (5).

9. The E-shaped iron core guided closed planar electromagnetic heating device according to claim 8, characterized in that: The clamping member comprises a mounting frame (44), a first gear (441), a second gear (442), an upper clamping rod (4411), a lower clamping rod (4421), and a clamping shaft (443); the mounting frame (44) and the central gear (43) are rotatably and slidably matched; the first gear (441) and the second gear (442) are both rotatably arranged on the mounting frame (44); the first gear (441) and the second gear (442) are arranged in a height direction of the base (1); the first gear (441) and the second gear (442) are connected to the central gear (43); The distance between the axes is equal, the first gear (441) and the second gear (442) have the same number of teeth and mesh with each other, the upper clamping rod (4411) is fixedly connected to the first gear (441), and the lower clamping rod (4421) is fixedly connected to the second gear (442), the upper clamping rod (4411) and the lower clamping rod (4421) are equal in length and have opposite inclination directions, and two clamping shafts (443) are provided, one of which is hinged to the two upper clamping rods (4411) at the same time, and the other clamping shaft (443) is hinged to the two lower clamping rods (4421) at the same time.

10. The E-shaped iron core guided closed planar electromagnetic heating device according to claim 8, characterized in that: The centering assembly (4) further comprises a sleeve (45), the central gear (43) is rotatably disposed in the sleeve (45), and the first gear (441) and the second rack (42) are both slidably engaged with the sleeve (45).

Images