Magnetic field generator, traveling wave magnetic field control system and integrated heat dissipation system

Abstract

This application discloses a magnetic field generating device, a traveling wave magnetic field control system, and an integrated heat dissipation system, relating to the field of steel rolling technology. The magnetic field generating device includes: a housing; an iron core and a coil, the iron core and coil being disposed within the housing, the coil being disposed on the iron core, and the iron core generating a magnetic field when the coil is energized; and an air duct, disposed within the housing, for dissipating heat from the iron core and the coil. The magnetic field generating device improves slag removal efficiency.

Description

Technical Field

[0001] This application relates to the field of steel rolling technology, and in particular to a magnetic field generating device, a traveling wave magnetic field control system, and an integrated heat dissipation system. Background Technology

[0002] In the steel industry, the zinc pot is the core equipment of a continuous galvanizing production line. Zinc dross generated during the galvanizing process affects the surface quality of galvanized sheets, and in severe cases, can cause the galvanized sheets to be scrapped. To remove zinc dross, some galvanizing lines, due to the limited space in the zinc pot area and numerous equipment limitations, can only rely on intensive manual dross removal. Manual dross removal not only involves a harsh working environment and high labor intensity, but also poses personal safety hazards when working in a high-temperature liquid area. Furthermore, manual dross removal easily disturbs the zinc liquid, resulting in zinc dross and zinc ash defects on the galvanized sheets. In addition, the amount of zinc dross generated is directly proportional to the unit speed; when the production line speeds up, manual dross removal sometimes cannot keep up, leading to a decrease in production efficiency. Moreover, because a small amount of zinc liquid is carried away, existing magnetic field generating devices suffer from poor dross removal efficiency and increased zinc material consumption. Utility Model Content

[0003] This application provides a magnetic field generating device, a traveling wave magnetic field control system, and an integrated heat dissipation system to solve technical problems such as poor slag removal efficiency and increased zinc material consumption in the prior art.

[0004] A first aspect of this application provides a magnetic field generating device, comprising:

[0005] shell;

[0006] The iron core and coil are housed in the outer casing, with the coil mounted on the iron core. When the coil is energized, the iron core is used to generate a magnetic field.

[0007] The air duct is located inside the casing and is used to dissipate heat from the iron core and coil.

[0008] The magnetic field generating device in this embodiment improves the slag removal efficiency of the zinc pot, reduces the consumption of zinc materials, and thus saves production costs.

[0009] According to a second aspect of this utility model, a traveling wave magnetic field control system is proposed, comprising: a plurality of magnetic field generating devices as defined in the first aspect above, thus possessing all the beneficial technical effects of the magnetic field generating devices as defined in the first aspect above, which will not be elaborated further here.

[0010] According to a third aspect of this utility model, an integrated heat dissipation system is proposed, comprising: a plurality of traveling wave magnetic field control systems as defined in the second aspect above, thus possessing all the beneficial technical effects of the traveling wave magnetic field control system as defined in the second aspect above, which will not be elaborated further here. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is one of the schematic diagrams of the magnetic field generating device provided in the embodiments of this application;

[0013] Figure 2 A schematic diagram of a galvanizing pot provided in an embodiment of this application;

[0014] Figure 3 A cross-sectional view of the iron core provided in an embodiment of this application;

[0015] Figure 4 The winding wiring diagram provided for the embodiments of this application;

[0016] Figure 5 The slot shape diagram of the iron core provided in the embodiments of this application;

[0017] Figure 6 A second schematic diagram of the magnetic field generating device provided in the embodiments of this application;

[0018] in, Figure 1 and Figure 3 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0019] 100 Magnetic field generating device, 101 Housing, 102 Iron core, 103 Coil, 104 Air duct, 105 Junction box, 106 First air outlet, 107 Second air outlet. Detailed Implementation

[0020] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0021] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0022] In some embodiments, such as Figure 1 As shown, an embodiment of this application provides a magnetic field generating device 100, comprising:

[0023] Outer shell 101;

[0024] The iron core 102 and the coil 103 are disposed in the outer casing 101. The coil 103 is disposed on the iron core 102. When the coil 103 is energized, the iron core 102 is used to generate a magnetic field.

[0025] Air duct 104 is disposed in housing 101 and is used to dissipate heat from iron core 102 and coil 103.

[0026] In this embodiment, a magnetic field generating device 100 is proposed for use in a zinc pot.

[0027] For example, the magnetic field generating device 100 can remove scum from the zinc pot.

[0028] The magnetic field generating device 100 includes a housing 101, an iron core 102, and a coil 103. The iron core 102 and the coil 103 are disposed in the housing 101, and the coil 103 is disposed on the iron core 102. When the coil 103 is energized, the iron core 102 is used to generate a magnetic field.

[0029] For example, the outer shell 101 may be cuboid in shape.

[0030] For example, the iron core 102 can generate a traveling wave magnetic field.

[0031] The magnetic field generating device 100 also includes a duct 104, which is disposed in the housing 101 and is used to dissipate heat from the iron core 102 and the coil 103.

[0032] For example, the air duct 104 can serve as an air-cooling device.

[0033] For example, the magnetic field generating device 100 is supplied with three-phase alternating current to generate a traveling wave magnetic field. Utilizing the magnetoelectric effect, electrical energy is converted into mechanical energy to drive the zinc slag to move, thereby achieving the slag removal function. At the same time, heat is generated due to the thermal effect of the current and eddy current hysteresis loss, which is detrimental to the device. Therefore, a heat dissipation structure such as the air duct 104 is used to dissipate heat from the magnetic field generating device 100.

[0034] For example, the winding is embedded in the iron core 102, which is placed inside the outer casing 101. The device is supplied with three-phase alternating current to generate a traveling wave magnetic field. By utilizing the magnetoelectric effect, electrical energy is converted into mechanical energy to drive the zinc slag to move, thereby achieving the slag removal function.

[0035] Due to the thermal effect of current and eddy current hysteresis loss, the device generates heat during the power-on process, which is detrimental to the device. Therefore, a heat dissipation structure is used to allow cool air to enter from the air inlet, pass through the inside of the device, and exit from the air outlet, carrying away the heat generated by copper and iron losses.

[0036] It should be noted that the magnetic field generating device 100 is used in the zinc pot. When the magnetic field generating device 100 is connected to three-phase alternating current, it generates a traveling wave magnetic field. The traveling wave magnetic field drives the zinc liquid on the surface of the zinc pot to flow in the direction of zinc flow. The zinc liquid carries the scum to move, so that the scum gathers behind the furnace nose to complete the electromagnetic scum removal, thereby improving the scum removal efficiency of the magnetic field generating device 100 for the zinc pot.

[0037] The magnetic field generating device 100 in this embodiment improves the slag removal efficiency of the zinc pot.

[0038] For example, the core 102 can be specially designed. As a magnetic circuit component that provides and concentrates the magnetic field, the design of the core 102 largely determines the magnetic field strength, thermal performance, and stability. The device core 102 adopts a multi-groove oriented silicon steel sheet stacked design.

[0039] For example, a unique slot design, which is also an important factor in determining the efficiency of the device, is used in the design to ensure the performance of the device. A U-shaped opening slot is used, and a slot wedge is added to the slot opening.

[0040] For example, in a practical winding design, the device windings directly determine the efficiency, operating performance and reliability of the motor. This embodiment adopts a double-layer lap winding distributed arrangement design.

[0041] In some embodiments of this application, a magnetic field generating device 100 is provided, the magnetic field generating device 100 further comprising:

[0042] Junction box 105 is mounted on housing 101 and is used to connect to power supply.

[0043] In this embodiment, the junction box 105 is disposed on the housing 101 and is used to connect the power supply.

[0044] In some embodiments of this application, a magnetic field generating device 100 is provided, and the junction box 105 includes a first terminal, a second terminal and a third terminal;

[0045] The first, second, and third terminals are used to connect the electrodes to the power supply.

[0046] In this embodiment, the junction box 105 includes a first terminal, a second terminal, and a third terminal, which are respectively connected to the electrodes of the power supply.

[0047] For example, the first terminal, the second terminal, and the third terminal are respectively connected to the A, B, and C phases of the AC power supply.

[0048] In some embodiments of this application, a magnetic field generating device 100 is provided, and the air duct 104 includes a first air outlet 106 and a second air outlet 107.

[0049] The first air vent 106 is located on one side of the housing 101, and the second air vent 107 is located on the other side of the housing 101.

[0050] In this embodiment, the air duct 104 includes a first air inlet 106 and a second air inlet 107, wherein the first air inlet 106 is an air inlet and the second air inlet 107 is an air outlet.

[0051] The first air vent 106 is located on one side of the housing 101, and the second air vent 107 is located on the other side of the housing 101.

[0052] For example, the first air vent 106 may be disposed on the upper surface of the housing 101, and the second air vent 107 may be disposed on the front surface of the housing 101.

[0053] In some embodiments of this application, a magnetic field generating device 100 is provided, wherein the iron core 102 includes a plurality of slots.

[0054] In this embodiment, the iron core 102 is provided with multiple slots.

[0055] For example, the iron core 102 may be provided with 42 slots.

[0056] In some embodiments, the present application provides a magnetic field generating device 100, wherein the coil 103 has a double-layer winding structure.

[0057] In this embodiment, coil 103 has a double-layer winding structure.

[0058] For example, coil 103 uniformly uses a double-layer winding, with 5 turns in each layer and 1.5*12 turns per turn in parallel winding.

[0059] In some embodiments, the present application provides a magnetic field generating device 100, wherein the coil 103 is a coil 103 with a variable number of turns.

[0060] In this embodiment, the number of turns of coil 103 can be adjusted according to the power of magnetic field generating device 100.

[0061] In some embodiments of this application, a magnetic field generating device 100 is provided, wherein the number of multiple slots is related to the size of the iron core 102.

[0062] In this embodiment, the number of slots is related to the size of the core 102.

[0063] For example, the larger the size of the iron core 102, the more grooves there are.

[0064] For example, in the field, the heat dissipation structure of the magnetic field generator 100 adopts a consistent air duct layout design.

[0065] For example, the iron core 102 includes multiple slots, the number of which is determined by the site space structure.

[0066] For example, the coil 103 has a double-layer winding structure, which can improve the output power.

[0067] For example, the number of turns of coil 103 changes with power.

[0068] In some embodiments, this application provides a traveling wave magnetic field control system, including a plurality of magnetic field generating devices 100 as described in any of the above embodiments. Therefore, this traveling wave magnetic field control system possesses all the beneficial effects of the magnetic field generating device 100 in any of the above embodiments, which will not be elaborated further here.

[0069] In some embodiments, this application provides an integrated heat dissipation system, including the traveling wave magnetic field control system of any of the above embodiments. Therefore, this integrated heat dissipation system possesses all the beneficial effects of the traveling wave magnetic field control system of any of the above embodiments, which will not be elaborated further here.

[0070] The shortcomings of existing technologies:

[0071] Safety Hazards: During the galvanizing process, the temperature in the zinc pot area can reach 500-700℃, posing a high-temperature safety hazard. Furthermore, the noise from the air knife, high-decibel noise, and zinc powder contamination also pose a threat to operators.

[0072] High labor intensity: Manual slag removal is labor-intensive, especially in the narrow V-shaped area where the operating space is limited and there are many pieces of equipment, which increases the difficulty of operation and physical exertion.

[0073] Unstable galvanizing quality: Manual slag removal can easily disturb the zinc bath, leading to a high incidence of zinc dross and zinc ash defects, which affects the surface quality of galvanized products.

[0074] Low production efficiency: Manual slag removal limits production efficiency, and the need for interleaved transition coils during galvanizing of high-end products reduces continuous plate throughput and increases production costs.

[0075] Difficult equipment maintenance: Zinc dross easily condenses on the equipment, requiring frequent shutdowns for cleaning, which increases maintenance costs and repair time.

[0076] Increased zinc consumption: During manual slag removal, useful zinc liquid is easily skimmed off, leading to increased zinc consumption and raising production costs.

[0077] This embodiment determines the slag removal route through on-site investigation and detailed analysis of process specifications and technical requirements. Figure 2 As shown, six traveling wave magnetic field generating devices are arranged around the strip steel above the zinc liquid. When the traveling wave magnetic field generating devices are connected to three-phase alternating current, they generate traveling wave magnetic fields. The traveling wave magnetic fields drive the zinc liquid on the surface of the zinc pot to flow in the direction of zinc flow. The zinc liquid drives the scum to move, so that the scum gathers behind the furnace nose to complete the electromagnetic scum removal.

[0078] This invention is based on two fundamental laws: first, the interaction between a moving conductive molten metal and a magnetic field generates an induced current; second, the interaction between a current-carrying molten metal and a magnetic field generates an electromagnetic force. This electromagnetic force acts on the molten zinc, thus driving its flow. During the design process, the maximum electromagnetic force required per unit area was first determined through on-site testing, based on slag formation principles and combined with electromagnetic calculations and a physical model of molten zinc flow. Simultaneously, due to the limited effective space allowed by the slag removal circuit, each traveling wave magnetic field generator cannot be identical. Therefore, the core 102 and windings must adhere to a unified principle to ensure that the traveling wave magnetic field generator changes accordingly with variations in effective space, thereby maximizing magnetic field uniformity and electromagnetic force stability. Based on this, the effective area, volume, power, and other basic parameters of each traveling wave magnetic field generator were determined. Then, based on these parameters, the core 102 design, slot design, winding design, heat dissipation channel design, and overall manufacturing process were completed.

[0079] Through communication with relevant personnel and on-site testing, the maximum electromagnetic force required per unit area was determined. Then, based on the available space allowed by the slag removal line, the on-site layout of the traveling wave magnetic field generator was determined. Finally, combining electromagnetic calculations and thermal balance calculations, the basic parameters of the traveling wave magnetic field generator, such as effective area, volume, power, and quantity, were designed. The design principle is as follows:

[0080] First, based on the site conditions, it was determined that six wave magnetic field generating devices would be used to perform electromagnetic slag removal, with their effective area maximized within the limits of site conditions. Next, based on the length of the zinc flow direction of each generating device, a unified rule was established to determine the number of tanks and the pitch of each generating device. Then, the power of each generating device was determined according to the following equation:

[0081] P = 2K1fτFS;

[0082] Where K1 is the estimation coefficient, f is the input frequency, S is the effective area, τ is the pitch, and F is the maximum electromagnetic force required per unit area.

[0083] Finally, based on the power and the available space for the slag removal circuit, the design of the iron core 102, the slot design, the winding design, the heat dissipation channel design, and the determination of the overall manufacturing process were completed.

[0084] For example, the cross-sectional view of the iron core 102 is as follows Figure 3 As shown, since the structure of the traveling wave generator core 102 is the same, but the number of slots and the size are different, only 42 slots are selected for illustration.

[0085] For example, to improve power, a double-layer winding with 5 turns per layer was used. Each turn was wound in parallel with 1.5 x 12 turns. The winding diagram is as follows. Figure 4 As shown, since the power and number of slots of the traveling wave generator are different, but the winding design scheme is the same, 42 slots are selected for explanation.

[0086] For example, to facilitate winding embedding and fixing and improve heat dissipation performance, a U-wedge opening slot is used, with a slot wedge groove at the opening, the groove shape being as follows: Figure 5 As shown.

[0087] For example, because the traveling wave generator has high power and the equipment is filled with molten zinc, forced cooling is the only option. Cooling air enters through the upper air inlet and exits through the lower air outlet. Figure 6 As shown.

[0088] For example, the traveling wave magnetic field generator should theoretically have separate current and frequency control. Since there is no dedicated controller, we use a Hopewind frequency converter instead. We use the open-loop control function of the frequency converter to adjust the current by setting the voltage and adjust the speed by adjusting the frequency.

[0089] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0090] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

[0091] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.

[0092] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, this specification is also intended to include such modifications and variations.

Claims

1. A magnetic field generating device, characterized in that, The magnetic field generating device includes: shell; An iron core and a coil are disposed in the housing, the coil being disposed on the iron core, and the iron core being used to generate a magnetic field when the coil is energized. An air duct, which is disposed in the housing, is used to dissipate heat from the iron core and the coil.

2. The magnetic field generating device according to claim 1, characterized in that, The magnetic field generating device further includes: A junction box, which is disposed on the housing, is used to connect a power source.

3. The magnetic field generating device according to claim 2, characterized in that, The junction box includes a first terminal, a second terminal, and a third terminal; The first terminal, the second terminal, and the third terminal are used to connect to the electrodes of the power supply.

4. The magnetic field generating device according to claim 1, characterized in that, The air duct includes a first air outlet and a second air outlet; The first air vent is located on one side of the housing, and the second air vent is located on the other side of the housing.

5. The magnetic field generating device according to any one of claims 1 to 4, characterized in that, The iron core includes multiple slots.

6. The magnetic field generating device according to claim 5, characterized in that, The coil has a double-layer winding structure.

7. The magnetic field generating device according to claim 6, characterized in that, The coil is a coil with a variable number of turns.

8. The magnetic field generating device according to claim 5, characterized in that, The number of the plurality of grooves is related to the size of the iron core.

9. A traveling wave magnetic field control system, characterized in that, The traveling wave magnetic field control system includes: Multiple magnetic field generating devices as described in any one of claims 1 to 8.

10. An integrated heat dissipation system, characterized in that, The integrated heat dissipation system includes: The traveling wave magnetic field control system as described in claim 9.

Images