Electromagnetic induction heating module, heating equipment and slab production line

Abstract

The utility model discloses an electromagnetic induction heating module, heating equipment and a slab production line, and relates to the technical field of induction heating. The heating module comprises a shell, a coil, and a first magnetic conductive assembly, a second magnetic conductive assembly and a third magnetic conductive assembly which are sequentially arranged along the length direction of the coil, the first magnetic conductive assembly and the third magnetic conductive assembly respectively correspond to two side parts of a to-be-heated object, and the second magnetic conductive assembly corresponds to the middle part of the to-be-heated object; the first magnetic conductive assembly and the third magnetic conductive assembly each comprise a first magnetizer which is matched with the coil and can move up and down, and the second magnetic conductive assembly comprises a second magnetizer which is matched with the coil and is fixed. By adjusting the gap between the first magnetizer and the to-be-heated object, the heating temperature of the area corresponding to the to-be-heated object is adjusted, and the temperature uniformity of the to-be-heated object in the width direction is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of induction heating technology, and in particular relates to an electromagnetic induction heating module, heating equipment and slab production line. Background Technology

[0002] In induction heating technology, transverse magnetic field heating and longitudinal magnetic field heating are two main heating methods. Compared with longitudinal magnetic field heating, transverse magnetic field heating has many significant advantages:

[0003] First, longitudinal magnetic field heating uses a coil in the form of a spiral tube. When the slab passes through the closed channel of the heater, an induced current is generated and it is heated. Since the closed channel of the longitudinal magnetic field has a fixed size, the deformation of the slab can easily damage the inductor. In contrast, transverse magnetic field heating includes induction heaters distributed vertically, with no other equipment or components on the left or right. This open channel structure avoids damage to the inductor caused by slab deformation (such as warping, deformation, or jumping) during longitudinal magnetic field heating, thereby greatly reducing the risk of equipment damage, reducing maintenance frequency, ensuring production continuity, and reducing labor intensity and production costs.

[0004] Secondly, during longitudinal magnetic field heating, the induced current on the slab forms a circulating current on the surface of the thick section. This results in a similar temperature distribution of the slab before and after heating (lower temperature at the edges and higher temperature in the center along the width), indicating that temperature non-uniformity still exists. Furthermore, when the slab thickness is thin, higher heating frequency is required to ensure heating efficiency, significantly increasing the investment cost of the heating equipment. Due to the magnetic field distribution characteristics of transverse magnetic field heating, heat can be transferred more evenly to all parts of the slab during the heating process, achieving more uniform slab heating, reducing performance differences caused by uneven heating, and improving product quality stability. Moreover, the frequency requirement is lower, and the equipment investment cost is significantly reduced.

[0005] Furthermore, transverse magnetic field heating allows for flexible adjustment of the position and arrangement of induction heaters according to different slab specifications and production needs, achieving optimal heating effects and meeting the requirements for temperature uniformity. This provides strong support for short-process steelmaking to produce steel of different specifications. However, despite the numerous advantages of transverse magnetic field heating, some problems still need to be addressed in the actual slab heating process, particularly regarding heating efficiency and temperature uniformity.

[0006] (1) Heating efficiency issues. Although transverse magnetic field heating improves heating efficiency to some extent compared to longitudinal magnetic field heating, there is still room for improvement when dealing with slabs of different materials, thicknesses, and widths. For example, for some high-strength, high-toughness steel slabs, due to their relatively poor thermal conductivity, transverse magnetic field heating is difficult to bring them to the ideal heating temperature in a short time, which affects production efficiency.

[0007] (2) Temperature uniformity issues. Although transverse magnetic field heating can achieve relatively uniform heating overall, temperature deviations may still occur in local areas, such as the edges and corners of the slab. This temperature non-uniformity may lead to dimensional deviations and inconsistent performance of the slab during subsequent rolling processes, affecting the quality of the final product.

[0008] In conclusion, the importance of induction heating technology under the trend of short-process steelmaking is self-evident, and transverse magnetic field heating plays a key role in short-process steelmaking due to its unique advantages. However, the problems of heating efficiency and temperature uniformity in the process of heating slabs by transverse magnetic field heating must be taken seriously and solved. Utility Model Content

[0009] The purpose of this invention is to provide an electromagnetic induction heating module, heating equipment, and slab production line to solve the problems of poor heating efficiency and poor temperature uniformity in the width direction of traditional heating equipment.

[0010] This utility model solves the above-mentioned technical problems through the following technical solution: an electromagnetic induction heating module, including a shell, a coil disposed inside the shell, and a first magnetic conductive component, a second magnetic conductive component, and a third magnetic conductive component arranged sequentially along the length direction of the coil. The first magnetic conductive component and the third magnetic conductive component correspond to the two sides of the object to be heated, and the second magnetic conductive component corresponds to the middle part of the object to be heated. The first magnetic conductive component and the third magnetic conductive component each include a first magnetic conductive body that cooperates with the coil and can move up and down, and the second magnetic conductive component includes a second magnetic conductive body that cooperates with the coil and is fixed.

[0011] In the electromagnetic induction heating module of this utility model, the gap between the first magnetic conductor and the object to be heated is adjusted by adjusting the first magnetic conductor, thereby adjusting the heating temperature of a local area of ​​the object to be heated corresponding to the first magnetic conductor, and achieving temperature uniformity in the width direction of the object to be heated.

[0012] Furthermore, the heating module also includes a hydraulic drive module or an electronically controlled drive module;

[0013] The hydraulic drive module includes a servo hydraulic cylinder and a hydraulic controller. The piston rod of the servo hydraulic cylinder passes through the housing and is connected to the first magnetic conductor. The hydraulic controller is connected to the servo hydraulic cylinder.

[0014] The electronically controlled drive module includes a drive motor, a linear motion mechanism, and an electronic controller. The linear motion mechanism passes through the housing and is connected to the first magnetic conductor. The electronic controller is connected to the linear motion mechanism through the drive motor.

[0015] Furthermore, the number of servo hydraulic cylinders is two, and the two servo hydraulic cylinders are arranged symmetrically about the center line of the first magnetic conductor.

[0016] Furthermore, the number of the first magnetic conductive component and the third magnetic conductive component are equal and there are multiple of each, with each first magnetic conductive component or each third magnetic conductive component corresponding to a region in the width direction of the object to be heated.

[0017] Furthermore, a groove is formed at the bottom of the first and second magnetic conductors to cooperate with the coil, and the long side of the coil passes through the groove of the first and second magnetic conductors.

[0018] When each long side cross section of the coil corresponds to a different groove of the first magnetic conductor and / or the second magnetic conductor, the first width is greater than or equal to twice the second width; wherein, the first width refers to the width of the magnetic conductor between two adjacent grooves of the first magnetic conductor and / or the second magnetic conductor, and the second width refers to the width of the outer wall of the magnetic conductor of the outermost groove.

[0019] Furthermore, the second magnetic conductor is fixed to the outer shell by a connecting assembly, which includes an insulating bolt and an insulating block. One end of the insulating bolt is disposed on the second magnetic conductor, and the other end is disposed on the outer shell. The insulating block is located between the second magnetic conductor and the outer shell and is sleeved on the insulating bolt.

[0020] Furthermore, a first potting layer is provided outside the coil, and a second potting layer is provided on the inner wall of the outer casing, wherein the first potting layer and the second potting layer form an integral whole;

[0021] A heat-insulating buffer layer is provided between the bottom of the first magnetic conductor and the second potting layer on the bottom surface of the outer shell.

[0022] Furthermore, the first magnetic conductor and the second magnetic conductor are made of soft magnetic composite material.

[0023] Based on the same concept, this utility model also provides a heating device, including two electromagnetic induction heating modules as described above, wherein the two electromagnetic induction heating modules are arranged symmetrically with the thickness centerline of the object to be heated as the axis of symmetry.

[0024] Based on the same concept, this utility model also provides a slab production line, on which the heating equipment described above is provided.

[0025] Beneficial effects

[0026] Compared with the prior art, the advantages of this utility model are:

[0027] This invention's electromagnetic induction heating module employs a combination design of a coil and a magnetic conductor. The first magnetic conductors at both ends of the coil's length direction are movable. The gap between the first magnetic conductor and the slab is adjusted by hydraulically driven, electrically driven, or sliding mechanisms, thereby regulating the magnetic flux. By controlling the magnetic flux, the magnitude of the induced current in the corresponding area of ​​the heated object is adjusted, which in turn regulates the heating temperature of each area along the width of the heated object. This achieves uniform temperature control across the entire width of the heated object, improving product quality. Simultaneously, because the first magnetic conductor is movable, magnetic line loss is reduced, significantly improving heating efficiency, increasing energy utilization, and lowering heating costs.

[0028] Heating temperature can be controlled by adjusting the first magnetic conductor, avoiding the overall operation of the electromagnetic induction heating module and eliminating the need for misalignment between adjacent heating devices on a production line. This results in a more compact structure, higher control precision, and lower complexity.

[0029] The first and second magnetic conductors are made of soft magnetic composite materials, which concentrates the magnetic field generated by the coil in the soft magnetic composite material with high relative permeability and low magnetic resistance. Compared with the case without magnetic conductors, the magnetic field loss of this invention is greatly reduced, the magnetic field utilization rate is greatly improved, and the heating power consumption and cost are reduced. Attached Figure Description

[0030] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only one embodiment of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a cross-sectional view of the arrangement of the two electromagnetic induction heating modules and the first magnetic conductive component or the third magnetic conductive component in an embodiment of this utility model.

[0032] Figure 2 This is a cross-sectional view of the second magnetic conductive component in an embodiment of this utility model;

[0033] Figure 3This is a schematic diagram of a rectangular coil formed by an O-shaped winding method in an embodiment of this utility model;

[0034] Figure 4 This is a schematic diagram of a rectangular coil formed by a figure-eight winding method in an embodiment of this utility model;

[0035] Figure 5 This is an embodiment of the present utility model. Figure 3 The diagram shows the cross-section of the long side of the rectangular coil corresponding to different grooves of the first magnetic conductor; where b represents the width of the first magnetic conductor between two adjacent grooves, a represents the width of the outer wall of the magnetic conductor of the outermost groove, e represents the distance between the coil and the first magnetic conductor, d represents the distance between the groove and the top surface of the first magnetic conductor, c represents the maximum stroke of the first magnetic conductor, and h1 represents the margin and is greater than 0.

[0036] Figure 6 This is an embodiment of the present utility model. Figure 3 The diagram shows the cross-section of the long side of the rectangular coil corresponding to the same groove of the first magnetic conductor;

[0037] Figure 7 This is an embodiment of the present utility model. Figure 4 The diagram shows the cross-section of the long side of the rectangular coil corresponding to different grooves of the first magnetic conductor, with both outer walls of the outermost groove being magnetic conductors.

[0038] Figure 8 This is an embodiment of the present utility model. Figure 4 The diagram shows the cross-section of the long side of the rectangular coil corresponding to different grooves of the first magnetic conductor, with the outermost groove having a magnetic conductor on one side and no outer wall on the other side.

[0039] Figure 9 These are magnetic field lines paths with different matching forms between the coil and the first and second magnetic conductors in the embodiments of this utility model.

[0040] Explanation of reference numerals in the attached drawings: 100 - Electromagnetic induction heating module located above the slab, 110 - First magnetic conductor, 120 - Outer shell, 121 - Second potting layer, 122 - Heat insulation buffer layer, 130 - Coil, 131 - First potting layer, 140 - Servo hydraulic cylinder, 150 - Hydraulic controller, 160 - Second magnetic conductor, 161 - Insulating bolt, 162 - Insulating block, 200 - Electromagnetic induction heating module located below the slab, 300 - Slab, 400 - Conveyor roller. Detailed Implementation

[0041] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0042] The electromagnetic induction heating module of this invention will be explained using a slab as an example. Figure 1 and Figure 2 As shown, the electromagnetic induction heating module includes a housing 120, a coil 130 disposed within the housing 120, and a first magnetic conductive component, a second magnetic conductive component, and a third magnetic conductive component arranged sequentially along the length of the coil 130. The first magnetic conductive component and the third magnetic conductive component correspond to the two sides of the blank to be heated, respectively, and the second magnetic conductive component corresponds to the middle of the object to be heated. The first magnetic conductive component and the third magnetic conductive component each include a first magnetic conductive body 110 that cooperates with the coil 130 and can move up and down, and the second magnetic conductive component includes a second magnetic conductive body 160 that cooperates with the coil 130 and is fixed.

[0043] During the continuous casting and forming process, heat is continuously dissipated from the slab. Furthermore, the heat dissipation rate at the edges and corners of the slab is greater than that at the center along the width direction. Before reaching the induction heating zone, the temperature along the width of the slab already exhibits a pattern of lower temperatures at the edges and higher temperatures at the center. Therefore, in the electromagnetic induction heating module of this invention, the first and third magnetic conductive components corresponding to the two sides of the slab both employ a movable first magnetic conductor 110, while the second magnetic conductive component corresponding to the center of the slab employs a fixed second magnetic conductor 160. By adjusting the first magnetic conductor 110, the gap between the first magnetic conductor 110 and the slab to be heated is adjusted, thereby regulating the heating temperature of the area on the slab corresponding to the first magnetic conductor 110. This gradually unifies the temperature between the edges and the center of the slab, achieving temperature uniformity along the width of the object being heated.

[0044] In a specific embodiment of this utility model, the heating module further includes a hydraulic drive module or an electronically controlled drive module, which drives the first magnetic conductor 110 to move up and down via hydraulic or electronic drive. When the temperature of the edge region of the slab is detected to be low (e.g., below the target temperature of that region), the corresponding first magnetic conductor 110 is controlled to move downward, reducing the gap between the first magnetic conductor 110 and the slab, increasing the magnetic flux in that region, thereby increasing the magnitude of the induced current in that region, raising the heating temperature of that region, and increasing the temperature rise rate of that region. When the temperature of the edge region of the slab is detected to be high (e.g., above the target temperature of that region), the corresponding first magnetic conductor 110 is controlled to move upward, increasing the gap between the first magnetic conductor 110 and the slab, reducing the magnetic flux in that region, thereby reducing the magnitude of the induced current in that region, lowering the heating temperature of that region, and reducing the temperature rise rate of that region.

[0045] The hydraulic drive module includes a servo hydraulic cylinder 140 and a hydraulic controller 150. The piston rod of the servo hydraulic cylinder 140 passes through the housing 120 and connects to the first magnetic conductor 110. The hydraulic controller 150 is connected to the servo hydraulic cylinder 140. To ensure smooth up-and-down movement of the first magnetic conductor 110, two servo hydraulic cylinders 140 are configured for each first magnetic conductor 110. The two servo hydraulic cylinders 140 are symmetrically arranged about the center line of the first magnetic conductor 110, and are synchronously controlled by the same hydraulic controller 150, ensuring that the first magnetic conductor 110 does not jam during up-and-down movement.

[0046] The displacement accuracy of the first magnetic conductor 110 controlled by hydraulic drive can reach 0.1mm, which has high control accuracy for strengthening and weakening the magnetic field, better temperature uniformity control effect, and improved control accuracy.

[0047] The electronically controlled drive module includes a drive motor, a linear motion mechanism, and an electronic controller. The linear motion mechanism passes through the housing 120 and is connected to the first magnetic conductor 110. The electronic controller is connected to the linear motion mechanism through the drive motor. The electronic controller controls the linear motion mechanism to move linearly through the drive motor, thereby driving the first magnetic conductor 110 to move up and down.

[0048] In a specific embodiment of this utility model, the number of the first magnetic conductive component and the third magnetic conductive component are equal and there are multiple of them. Each first magnetic conductive component or each third magnetic conductive component corresponds to a region in the width direction of the slab to be heated.

[0049] The slab is divided into regions along its width. The middle region corresponds to the second magnetic conductor 160 of the second magnetic component, while the two outer regions correspond to the first and third magnetic components, respectively. When there are multiple first and third magnetic components, the outer regions are divided into multiple sub-regions, each corresponding to a first magnetic conductor 110 of either the first or third magnetic component. The more regions divided along the slab's width, the more first magnetic conductors 110 there are, resulting in more precise temperature control in each region and better temperature uniformity along the slab's width.

[0050] The first magnetic conductive assembly, the second magnetic conductive assembly, and the third magnetic conductive assembly are arranged along the length of the coil 130. The width of the blank is adapted to the inner length of the coil 130, that is, the length of the magnetic conductive body arranged on the coil 130 is adapted to the width of the blank. The first magnetic conductive body 110 on both sides of the coil 130 corresponds to the edge of the blank, and the second magnetic conductive body 160 in the middle of the coil 130 corresponds to the middle area of ​​the blank.

[0051] In a specific embodiment of this utility model, both the first magnetic conductor 110 and the second magnetic conductor 160 are made of soft magnetic composite material. Soft magnetic composite material has good magnetic permeability and high magnetic saturation. Most importantly, even under medium and high frequency operating conditions, its induced eddy currents are small and the heat generation is negligible, which can greatly simplify the cooling water circuit of the entire heating device. The magnetic conductors of this type of heating device do not require water cooling.

[0052] The first magnetic conductor 110 and the second magnetic conductor 160 are engaged with the coil 130 in the same way. In a specific embodiment of this utility model, grooves that engage with the coil 130 are provided at the bottom of the first magnetic conductor 110 and the second magnetic conductor 160, and the long side of the coil 130 passes through the grooves of the first magnetic conductor 110 and the second magnetic conductor 160.

[0053] In this embodiment, the coil 130 is formed by winding a copper tube. The coil 130 is rectangular in shape. A rectangular coil reduces the change in magnetic flux at the arc transition and ensures that the second magnetic conductor 160 and the first magnetic conductor 110 are consistent in shape. The coil 130 can be formed into a rectangular coil using an O-shaped winding method, such as... Figure 3 As shown; a rectangular coil can also be formed using a figure-eight winding method, such as... Figure 4 As shown. Figure 4 In this process, the left and right parts of a rectangular coil are connected in series using an 8-shaped winding method. After being connected in series, they share a shielding cover on the outside of the coil for magnetic shielding. At the same time, the magnetic fields generated by the left and right parts are in opposite directions.

[0054] Arranging magnetic conductors along the magnetic field lines generated by coil 130 serves to concentrate the magnetism. The more magnetic conductors arranged in the magnetic field loop, the smaller the magnetic field loss and the higher the energy utilization rate. Based on this, there are various matching methods between coil 130 and the first magnetic conductor 110 and the second magnetic conductor 160, such as... Figures 5 to 7 As shown.

[0055] for Figure 3 In the first embodiment of the rectangular coil shown, the two long sides of the coil 130 pass through two different grooves of the first magnetic conductor 110 and the second magnetic conductor 160, respectively. That is, the cross-sections of the two long sides of the coil 130 correspond to two different grooves of the first magnetic conductor 110 and the second magnetic conductor 160, respectively. Figure 5 As shown; in the second embodiment, the two long sides of the coil 130 pass through the same groove of the first magnetic conductor 110 and the second magnetic conductor 160, that is, the cross-sections of the two long sides of the coil 130 correspond to the same groove of the first magnetic conductor 110 and the second magnetic conductor 160, as shown. Figure 6 As shown.

[0056] for Figure 5 The matching configuration of coil 130 with the first magnetic conductor 110 and the second magnetic conductor 160 is shown in the figure below. Figure 9 As shown, due to the relatively larger arrangement of magnetic conductors along the magnetic field path, the magnetic field loss is relatively smaller, resulting in relatively higher efficiency. However, this structural form leads to a relatively smaller winding space for coil 130, fewer turns, and a relatively smaller number of magnetic field lines generated. For Figure 6 The matching configuration of coil 130 with the first magnetic conductor 110 and the second magnetic conductor 160 is shown in the figure below. Figure 9 As shown, the winding space of coil 130 is larger (compared to...). Figure 5 Compared to the matching form, coil 130 has the same number of layers, but more turns can be wound in a single layer. However, since there is no magnetic conductor in the inner ring of coil 130, there is an air path in the magnetic field line path, resulting in relatively large magnetic field loss.

[0057] for Figure 4 The rectangular coil shown has three long sides (the two middle long sides merged into one) that pass through three different grooves in the first magnetic conductor 110 and the second magnetic conductor 160. The outer walls on both sides of the two outermost grooves of the first magnetic conductor 110 and the second magnetic conductor 160 can both be magnetic materials (e.g., Figure 7 As shown), it can also have a magnetic conductor on one side and no outer wall on the other side (such as...). Figure 8 (As shown). Figure 8 In the middle, the width of the outermost groove is f, f is greater than or equal to 0, the main path of the magnetic field lines is in the inner ring of the coil 130, and the outer path is shielded by the outer shell 120.

[0058] for Figure 7 The matching configuration of coil 130 with the first magnetic conductor 110 and the second magnetic conductor 160 is shown in the figure below. Figure 9 As shown, due to the relatively larger arrangement of magnetic conductors along the magnetic field path, the magnetic field loss is relatively smaller, resulting in relatively higher efficiency. However, this structural form leads to a relatively smaller winding space for coil 130, fewer turns, and a relatively smaller number of magnetic field lines generated. For Figure 8 The matching configuration of coil 130 with the first magnetic conductor 110 and the second magnetic conductor 160 is shown in the figure below. Figure 9 As shown, the winding space of coil 130 is larger (compared to...). Figure 7 Compared to the matching form, coil 130 has the same number of layers, but a single layer can be wound with more turns. However, since there is no magnetic conductor on the outer ring of coil 130, there is an air path in the magnetic field line path, resulting in relatively large magnetic field loss.

[0059] When each long side cross section of coil 130 corresponds to a different groove in the first magnetic conductor 110 and / or the second magnetic conductor 160 (e.g. Figure 5 and Figure 7 As shown, the first width b is greater than or equal to twice the second width a; where the first width b refers to the width of the magnetic conductor between two adjacent grooves of the first magnetic conductor 110 and / or the second magnetic conductor 160, and the second width a refers to the width of the outermost groove's outer wall of the magnetic conductor (i.e., the width of the outer wall with the magnetic conductor as the outer wall of the groove, and this outer wall being the outermost wall surface). This dimensional constraint ensures that the magnetic lines of force in the middle of the coil 130 all pass through the magnetic conductor when they disperse to both sides, without entering the air, reducing the loss of the magnetic field in the air, improving the magnetic field utilization rate, and improving the heating efficiency.

[0060] To ensure the normal vertical movement of the first magnetic conductor 110, such as Figure 5 As shown, the distance c+h1 between the bottom surface of the coil 130 and the bottom surface of the first magnetic conductor 110 is greater than the maximum stroke c of the first magnetic conductor 110, and the distance c+h2 between the top surface of the first magnetic conductor 110 and the inner wall of the outer shell 120 is greater than the maximum stroke c of the first magnetic conductor 110. Here, h1 and h2 both represent margins and are greater than zero, which ensures that the magnetic lines of force generated by the coil 130 are better concentrated in the magnetic conductor, reducing the divergence and loss of the magnetic field.

[0061] The number of turns in coil 130 is greater than or equal to 2, and the number of layers in coil 130 is greater than or equal to 2. When coil 130 has multiple turns and multiple layers... Figures 5 to 8 The dimension from coil 130 to a certain point is the dimension from the side of coil 130 closest to that point to that point. For example, Figures 5 to 8In the above, when the coil 130 has two layers, c+h1 represents the distance between the bottom surface of the lower layer of the coil 130 and the bottom surface of the first magnetic conductor 110, rather than the distance between the bottom surface of the upper layer of the coil 130 and the bottom surface of the first magnetic conductor 110.

[0062] In a specific embodiment of this utility model, the second magnetic conductor 160 is fixed to the outer casing 120 via a connecting assembly, such as... Figure 2 As shown, the connecting assembly includes an insulating bolt 161 and an insulating block 162. One end of the insulating bolt 161 is disposed on the second magnetic conductor 160, and the other end is disposed on the outer casing 120. The insulating block 162 is located between the second magnetic conductor 160 and the outer casing 120 and is sleeved on the insulating bolt 161. The insulating bolt 161 is a non-magnetic, high-strength insulating bolt, and the insulating block 162 ensures that the second magnetic conductor 160 and the outer casing 120 do not directly contact each other.

[0063] In a specific embodiment of this utility model, a first potting layer 131 is provided on the outside of the coil 130, and a second potting layer 121 is provided on the inner wall of the outer shell 120. The first potting layer 131 and the second potting layer 121 form an integral whole.

[0064] After the coil 130 is pre-formed, it forms an integral part with the first potting layer 131. This integral part, when assembled with the first magnetic conductor 110 and the second magnetic conductor 160, positions the coil 130 within the grooves of the first and second magnetic conductors 110 and 160. The first potting layer 131 encapsulates the coil 130 and maintains a certain thickness, ensuring insulation between the coil 130 and the first and second magnetic conductors 110 and 160. The thickness of the first potting layer 131 is related to the operating voltage of the electromagnetic induction heating module; the higher the operating voltage, the greater the thickness of the first potting layer 131. Simultaneously, the thickness of the first potting layer 131 closest to the first and second magnetic conductors 110 and 160 is less than the distance e between the coil 130 and the first and second magnetic conductors 110 and 160, ensuring smooth vertical movement of the first magnetic conductor 110.

[0065] The second potting layer 121 is disposed on the bottom and side surfaces of the outer casing 120 and forms an integral part with the first potting layer 131. To ensure the integrity of the potting layer and the outer casing 120, anchoring pins can be used to connect the second potting layer 121 and the outer casing 120, bearing the overall weight of the coil 130, the first potting layer 131, and the second potting layer 121. The first potting layer 131 and the second potting layer 121 are provided with a certain thickness to ensure structural strength. During the up-and-down movement of the first magnetic conductor 110, the first magnetic conductor 110 does not contact the second potting layer 121 on the bottom surface of the outer casing 120 at the lower limit position.

[0066] In a specific embodiment of this utility model, a heat insulation buffer layer 122 is provided between the bottom of the first magnetic conductor 110 and the second potting layer 121 on the bottom surface of the outer shell 120. The heat insulation buffer layer 122 is resistant to high temperature, which not only isolates the heat radiation of the heated slab, but also prevents the first magnetic conductor 110 from direct contact with the second potting layer 121 and from being damaged by mutual impact.

[0067] The heating device provided in this embodiment includes two electromagnetic induction heating modules 100 / 200, such as... Figure 1 As shown, the two electromagnetic induction heating modules 100 / 200 are arranged symmetrically with the thickness centerline of the slab 300 to be heated as the axis of symmetry.

[0068] The slab production line provided in this embodiment of the utility model is equipped with multiple heating devices. The multiple heating devices are arranged along the conveying direction of the slab. The number of heating devices is determined according to the slab production capacity of the production line and the target temperature to be achieved. Each heating device is the same, ensuring interchangeability.

[0069] The above description only discloses specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or modifications that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electromagnetic induction heating module, characterized in that, The heating module includes a housing, a coil disposed within the housing, and a first magnetic conductive component, a second magnetic conductive component, and a third magnetic conductive component arranged sequentially along the length of the coil. The first magnetic conductive component and the third magnetic conductive component correspond to the two sides of the object to be heated, respectively, and the second magnetic conductive component corresponds to the middle of the object to be heated. The first magnetic conductive component and the third magnetic conductive component each include a first magnetic conductive body that cooperates with the coil and can move up and down, and the second magnetic conductive component includes a second magnetic conductive body that cooperates with the coil and is fixed.

2. The electromagnetic induction heating module according to claim 1, characterized in that, The heating module also includes a hydraulic drive module or an electronically controlled drive module; The hydraulic drive module includes a servo hydraulic cylinder and a hydraulic controller. The piston rod of the servo hydraulic cylinder passes through the housing and is connected to the first magnetic conductor. The hydraulic controller is connected to the servo hydraulic cylinder. The electronically controlled drive module includes a drive motor, a linear motion mechanism, and an electronic controller. The linear motion mechanism passes through the housing and is connected to the first magnetic conductor. The electronic controller is connected to the linear motion mechanism through the drive motor.

3. The electromagnetic induction heating module according to claim 2, characterized in that, The number of servo hydraulic cylinders is 2, and the two servo hydraulic cylinders are arranged symmetrically about the center line of the first magnetic conductor.

4. The electromagnetic induction heating module according to claim 1, characterized in that, The number of the first magnetic conductive component and the third magnetic conductive component are equal and there are multiple of each. Each first magnetic conductive component or each third magnetic conductive component corresponds to a region in the width direction of the object to be heated.

5. The electromagnetic induction heating module according to claim 1, characterized in that, A groove is formed at the bottom of the first magnetic conductor and the second magnetic conductor to cooperate with the coil, and the long side of the coil passes through the groove of the first magnetic conductor and the second magnetic conductor; When each long side cross section of the coil corresponds to a different groove of the first magnetic conductor and / or the second magnetic conductor, the first width is greater than or equal to twice the second width; wherein, the first width refers to the width of the magnetic conductor between two adjacent grooves of the first magnetic conductor and / or the second magnetic conductor, and the second width refers to the width of the outer wall of the magnetic conductor of the outermost groove.

6. The electromagnetic induction heating module according to claim 1, characterized in that, The second magnetic conductor is fixed to the outer shell by a connecting assembly, which includes an insulating bolt and an insulating block. One end of the insulating bolt is located on the second magnetic conductor, and the other end is located on the outer shell. The insulating block is located between the second magnetic conductor and the outer shell and is sleeved on the insulating bolt.

7. The electromagnetic induction heating module according to claim 1, characterized in that, A first potting layer is provided outside the coil, and a second potting layer is provided on the inner wall of the outer shell. The first potting layer and the second potting layer form an integral whole. A heat-insulating buffer layer is provided between the bottom of the first magnetic conductor and the second potting layer on the bottom surface of the outer shell.

8. The electromagnetic induction heating module according to any one of claims 1 to 7, characterized in that, The first magnetic conductor and the second magnetic conductor are made of soft magnetic composite material.

9. A heating device, characterized in that: The heating device includes two electromagnetic induction heating modules as described in any one of claims 1 to 8, and the two electromagnetic induction heating modules are arranged symmetrically with the thickness centerline of the object to be heated as the axis of symmetry.

10. A slab production line, characterized in that: The production line is equipped with the heating equipment as described in claim 9.

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