An annealing device for iron-based nanocrystalline magnetic core

Abstract

The utility model discloses an even temperature device for iron-based nanocrystalline magnetic core annealing relates to iron-based nanocrystalline magnetic core annealing treatment technical field. The device includes furnace body, and the inside of furnace body is provided with clamp, is provided with iron-based nanocrystalline magnetic core on the clamp, and the lower portion of furnace body is provided with preheating unit, and the side of first air pump in preheating unit is provided with inlet pipe, and inlet pipe is communicated with nitrogen storage spare, and first air pump is communicated with furnace body, and second air pump is set up in the side of furnace body top, and heat exchange spare is set up in the side of first air pump. The device utilizes heat exchange spare to recycle the heat of high temperature gas output by second air pump, preheats nitrogen in inlet pipe, reduces the consumption of external energy, improves energy utilization, reduces production cost. At the same time, avoid the problem of temperature fluctuation in the furnace caused by unpreheated protective gas, guarantee the stability of temperature field in the furnace.

Description

Technical Field

[0001] This utility model relates to the field of annealing technology for iron-based nanocrystalline magnetic cores, specifically to a temperature equalization device for annealing iron-based nanocrystalline magnetic cores. Background Technology

[0002] In the production process of iron-based nanocrystalline magnetic cores, amorphous alloy strips are wound into cores of a specific shape. These cores are then placed in specialized fixtures and fed into a specially designed annealing furnace. Annealing is performed under precisely controlled temperatures, with the introduction of protective gas and preset heating and cooling rates. During this crucial annealing process, the amorphous matrix undergoes controlled crystallization, precipitating nanoscale magnetic grains that are uniformly dispersed within the remaining amorphous matrix, thereby achieving the desired nanocrystalline structure and excellent magnetic properties.

[0003] In existing technologies, protective gases are generally introduced directly into the annealing furnace without preheating. When unpreheated protective gases enter the high-temperature furnace, a large amount of heat is required to raise the temperature. This not only results in significant energy waste and prolongs the time it takes for the magnetic core to reach the target annealing temperature, reducing annealing efficiency, but also causes sudden drops in localized temperatures within the furnace, disrupting the stability of the furnace temperature field and further exacerbating temperature inhomogeneity. This makes it difficult to precisely control the annealing process parameters for different parts of the magnetic core, affecting the consistency and stability of the final performance of the core. Therefore, we propose a temperature equalization device for annealing iron-based nanocrystalline magnetic cores to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a uniform temperature device for annealing iron-based nanocrystalline magnetic cores. This solves the problem that in existing technologies, protective gas is generally introduced directly into the annealing furnace without preheating, which prolongs the time it takes for the magnetic core to reach the target annealing temperature and reduces annealing efficiency. Furthermore, it causes a sudden drop in local temperature within the furnace, disrupting the stability of the temperature field and further exacerbating the problem of uneven temperature distribution within the furnace.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a uniform temperature device for annealing iron-based nanocrystalline magnetic cores, comprising a furnace body, a clamp is provided inside the furnace body, an iron-based nanocrystalline magnetic core is provided on the clamp, and a preheating unit is provided below the furnace body, the preheating unit comprising a first air pump, a second air pump and a heat exchanger.

[0006] An air inlet pipe is provided on one side of the first air pump, which is connected to a nitrogen storage container. The first air pump is connected to the furnace body and is used to deliver nitrogen into the interior of the furnace body. The second air pump is located on one side of the top of the furnace body and is used to draw in high-temperature gas from the furnace body, thereby creating a negative pressure inside the container and guiding the gas in the furnace to form a forced convection circulation from bottom to top. The heat exchanger is located on one side of the first air pump and is used to discharge the high-temperature gas output by the second air pump and preheat the nitrogen inside the air inlet pipe.

[0007] Preferably, a first air pipe is provided on the top of the first air pump, and the first air pipe is connected to the furnace body.

[0008] Preferably, the top of the furnace body is hinged with a sealing cover, the top of the second air pump is provided with a second air pipe, the second air pipe is connected to the sealing cover, and one end of the second air pump is provided with a third air pipe.

[0009] Preferably, the heat exchanger includes a dust settling box and a baffle.

[0010] The dust settling box is located on one side of the third air pipe and is connected to the third air pipe; the baffle is fixedly installed inside the dust settling box.

[0011] Preferably, the heat exchanger further includes a collection box and a conduit;

[0012] The collection box is located inside the dust settling box, and the conduit is located on one side of the dust settling box and is connected to the dust settling box.

[0013] Preferably, the heat exchanger further includes a filter and a heat exchange tube;

[0014] The filter is disposed at the end of the conduit; the heat exchange tube is sleeved on the outer surface of the air inlet pipe, and the conduit is connected to the heat exchange tube.

[0015] Preferably, the heat exchanger further includes heat-conducting plates and air outlets;

[0016] The heat-conducting plates are disposed inside the heat exchange tube, and the heat-conducting plates are distributed in a ring array, and the heat-conducting plates abut against the air inlet pipe;

[0017] The vent is located on one side of the heat exchange tube.

[0018] This utility model discloses a uniform temperature device for annealing iron-based nanocrystalline magnetic cores, which has the following beneficial effects: The device utilizes a bottom-up forced convection circulation formed by a second suction pump, enabling uniform heat transfer within the furnace. This ensures that all parts of the iron-based nanocrystalline magnetic core are heated evenly during annealing, effectively improving the annealing quality and performance consistency of the core. Furthermore, the heat from the high-temperature gas output by the second suction pump is recovered using heat exchangers to preheat the nitrogen gas in the inlet pipe, reducing external energy consumption, improving energy utilization, and lowering production costs. Simultaneously, it avoids furnace temperature fluctuations caused by unpreheated protective gas, ensuring a stable furnace temperature field. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the furnace body of this utility model;

[0022] Figure 3 This is a schematic diagram of the preheating unit structure of this utility model.

[0023] In the diagram: 1. Furnace body; 2. Clamp; 3. Iron-based nanocrystalline magnetic core; 4. Preheating unit; 41. First air pump; 42. Second air pump; 43. Heat exchanger; 431. Dust settling box; 432. Baffle; 433. Collection box; 434. Conduit; 435. Filter; 436. Heat exchange tube; 437. Heat-conducting plate; 438. Air outlet; 44. First air pipe; 45. Second air pipe; 46. Third air pipe. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, 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.

[0025] This application provides a uniform temperature device for annealing iron-based nanocrystalline magnetic cores, which solves the problem in the prior art where protective gas is generally introduced directly into the annealing furnace without preheating, which prolongs the time for the magnetic core to reach the target annealing temperature and reduces annealing efficiency; moreover, it causes a sudden drop in local temperature inside the furnace, which disrupts the stability of the temperature field inside the furnace and further aggravates the problem of uneven temperature inside the furnace.

[0026] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0027] This utility model provides, for example Figure 1-2 The image shows a temperature equalization device for annealing iron-based nanocrystalline magnetic cores.

[0028] Example 1: Includes a furnace body 1, with a clamp 2 inside the furnace body 1, and an iron-based nanocrystalline magnetic core 3 on the clamp 2. A preheating unit 4 is provided below the furnace body 1. The preheating unit 4 includes a first air pump 41, a second air pump 42, and a heat exchanger 43.

[0029] An air inlet pipe is provided on one side of the first air pump 41, which is connected to the nitrogen storage container. The first air pump 41 is connected to the furnace body 1 and is used to deliver nitrogen into the interior of the furnace body 1. The second air pump 42 is provided on one side of the top of the furnace body 1 and is used to draw in the high-temperature gas inside the furnace body 1, thereby creating a negative pressure inside the container and guiding the gas in the furnace to form a forced convection circulation from bottom to top. The heat exchanger 43 is provided on one side of the first air pump 41 and is used to discharge the high-temperature gas output by the second air pump 42 and preheat the nitrogen inside the air inlet pipe.

[0030] In this embodiment, the device uses a combination of bottom-blowing and top-exhausting airflow in the furnace body 1 to maintain overall temperature consistency. During the annealing process, the heating element heats the furnace chamber. The heating element is an iron-chromium-aluminum resistance wire. Its principle is that when current passes through the resistance wire, free electrons collide with the metal lattice, converting electrical energy into heat energy. The first exhaust pump 41 at the bottom forces nitrogen into the furnace chamber. The nitrogen entering the lower part of the furnace chamber rises after being heated and mixes with the original high-temperature gas in the furnace chamber. The second exhaust pump 42 at the top extracts the gas from the upper part of the furnace chamber, forming a negative pressure, thereby guiding the gas in the entire furnace chamber to form a forced convection circulation from bottom to top.

[0031] This utility model discloses a temperature equalization device for annealing iron-based nanocrystalline magnetic cores. More specifically, based on Embodiment 1, it is provided according to the appendix... Figure 1 , 3 As shown.

[0032] Example 2: Includes a furnace body 1, with a clamp 2 inside the furnace body 1, and an iron-based nanocrystalline magnetic core 3 on the clamp 2. A preheating unit 4 is provided below the furnace body 1. The preheating unit 4 includes a first air pump 41, a second air pump 42, and a heat exchanger 43.

[0033] An air inlet pipe is provided on one side of the first air pump 41, which is connected to the nitrogen storage container. The first air pump 41 is connected to the furnace body 1 and is used to deliver nitrogen into the interior of the furnace body 1. The second air pump 42 is provided on one side of the top of the furnace body 1 and is used to draw in the high-temperature gas inside the furnace body 1, thereby creating a negative pressure inside the container and guiding the gas in the furnace to form a forced convection circulation from bottom to top. The heat exchanger 43 is provided on one side of the first air pump 41 and is used to discharge the high-temperature gas output by the second air pump 42 and preheat the nitrogen inside the air inlet pipe.

[0034] The first air pump 41 has a first air pipe 44 at its top, which communicates with the furnace body 1. A sealing cover is hinged to the top of the furnace body 1. The second air pump 42 has a second air pipe 45 at its top, which communicates with the sealing cover. A third air pipe 46 is located at one end of the second air pump 42. The heat exchanger 43 includes a dust settling box 431 and a baffle 432. The dust settling box 431 is located on one side of the third air pipe 46 and communicates with it. The baffle 432 is fixedly installed inside the dust settling box 431. The heat exchanger 43 also includes a collection box 433 and a conduit 434. The collection box 433 is located inside the dust settling box 431, and the conduit 434 is located on one side of the dust settling box 431 and communicates with it. The heat exchanger 43 also includes a filter 435 and a heat exchange tube 436; the filter 435 is disposed at the end of the conduit 434; the heat exchange tube 436 is sleeved on the outer surface of the inlet pipe, and the conduit 434 communicates with the heat exchange tube 436. The heat exchanger 43 also includes a heat-conducting plate 437 and an air outlet 438; the heat-conducting plate 437 is disposed inside the heat exchange tube 436, and the heat-conducting plate 437 is distributed in a ring array, and the heat-conducting plate 437 abuts against the inlet pipe; the air outlet 438 is opened on one side of the heat exchange tube 436.

[0035] In this embodiment, when using the device, the iron-based nanocrystalline magnetic core 3 is first placed on the clamp 2 inside the furnace body 1, and the sealing cover on the top of the furnace body 1 is closed. The first suction pump 41 is started, and nitrogen from the nitrogen storage device is transported into the furnace body 1 through the air inlet pipe, the first suction pump 41, and the first gas pipe 44, filling the entire furnace body 1 and providing an inert gas protective environment for the annealing of the magnetic core. Then, the second suction pump 42 is started. The second suction pump 42 draws in the high-temperature gas inside the furnace body 1 through the second gas pipe 45 and the sealing cover, forming a negative pressure inside the furnace body 1. This guides the gas in the furnace chamber to form a forced convection circulation from bottom to top, so that the heat is evenly transferred to all parts of the magnetic core. The high-temperature gas output by the second suction pump 42 enters the dust settling box 431 of the heat exchanger 43 through the third gas pipe 46. Inside the dust settling box 431, the baffle 432 changes the direction of gas flow, causing dust and other impurities to settle. The settled impurities fall into the collection box 433. After dust settling, the gas passes through conduit 434 and filter 435 for further impurity filtration before entering heat exchange tube 436. Inside heat exchange tube 436, the high-temperature gas exchanges heat with the nitrogen in the inlet pipe through the tube wall and heat-conducting fins 437, preheating the nitrogen. The low-temperature gas after heat exchange is discharged from the outlet 438. The preheated nitrogen enters furnace 1 and participates in the magnetic core annealing process. This cycle continues to achieve uniform temperature annealing of the iron-based nanocrystalline magnetic core 3.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A uniform temperature device for annealing iron-based nanocrystalline magnetic cores, comprising a furnace body (1), wherein a clamp (2) is disposed inside the furnace body (1), and an iron-based nanocrystalline magnetic core (3) is disposed on the clamp (2), characterized in that, A preheating unit (4) is provided below the furnace body (1), and the preheating unit (4) includes: The first air pump (41) has an air inlet pipe on one side, which is connected to the nitrogen storage device. The first air pump (41) is connected to the furnace body (1) and is used to transport nitrogen into the interior of the furnace body (1). The second air pump (42) is located on one side of the top of the furnace body (1). The second air pump (42) is used to draw in the high-temperature gas inside the furnace body (1) to create a negative pressure inside the tank and guide the gas in the furnace to form a forced convection circulation from bottom to top. A heat exchanger (43) is disposed on one side of the first air pump (41). The heat exchanger (43) is used to discharge the high-temperature gas output by the second air pump (42) and preheat the nitrogen inside the air inlet pipe.

2. The isothermal equalization device for annealing iron-based nanocrystalline magnetic cores according to claim 1, characterized in that: The first air pump (41) is provided with a first air pipe (44) at the top, and the first air pipe (44) is connected to the furnace body (1).

3. The isothermal equalization device for annealing iron-based nanocrystalline magnetic cores according to claim 1, characterized in that: The top of the furnace body (1) is hinged with a sealing cover, and the top of the second air pump (42) is provided with a second air pipe (45), which is connected to the sealing cover. One end of the second air pump (42) is provided with a third air pipe (46).

4. The isothermal equalization device for annealing iron-based nanocrystalline magnetic cores according to claim 3, characterized in that: The heat exchanger (43) includes: A dust settling box (431) is installed on one side of the third air pipe (46), and the dust settling box (431) is connected to the third air pipe (46); A baffle (432) is fixedly installed inside the dust settling box (431).

5. The isothermal equalization device for annealing iron-based nanocrystalline magnetic cores according to claim 4, characterized in that: The heat exchanger (43) also includes: A collection box (433) is located inside the dust settling box (431); A conduit (434) is disposed on one side of the dust settling box (431) and is connected to the dust settling box (431).

6. The isothermal equalization device for annealing iron-based nanocrystalline magnetic cores according to claim 5, characterized in that: The heat exchanger (43) also includes: A filter element (435) is disposed at the end of a conduit (434); A heat exchange tube (436) is sleeved on the outer surface of the air inlet pipe, and the conduit (434) is connected to the heat exchange tube (436).

7. The isothermal equalization device for annealing iron-based nanocrystalline magnetic cores according to claim 6, characterized in that: The heat exchanger (43) also includes: A heat-conducting plate (437) is disposed inside the heat exchange tube (436). The heat-conducting plate (437) is arranged in a ring array and abuts against the air inlet pipe. An air outlet (438) is located on one side of the heat exchange tube (436).

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