Calcining furnace for soft magnet oxygen material

Abstract

The utility model belongs to the technical field of soft magnetic processing, and particularly relates to a calcining furnace for a soft magnetic oxygen material, which comprises a calcining furnace body, a cover body is arranged on the calcining furnace body, a mounting frame is arranged below the calcining furnace body, and a stirring device and a gas dispersing device are arranged in the calcining furnace body in an injection manner. The stirring device comprises a stirring paddle, a hydraulic cylinder, a driving motor, an external magnetic ring and an internal driven magnetic ring, the stirring paddle is arranged in the calcining furnace body, the hydraulic cylinder is arranged in the calcining furnace body, one end of the stirring paddle is rotatably connected with the output end of the hydraulic cylinder, and the internal driven magnetic ring sleeves the peripheral wall of the stirring paddle and is fixedly connected with the stirring paddle; the driving motor is arranged outside the calcining furnace body and corresponds to the stirring paddle, the output end of the driving motor is sleeved with the external magnetic ring, and a supporting frame connected with the ground is arranged below the driving motor; compared with the prior art, materials can be heated more uniformly.

Description

Technical Field

[0001] This utility model relates to the field of soft magnetic processing technology, and more specifically, it relates to a calcination furnace for soft magnetic oxide materials. Background Technology

[0002] Soft magnetic materials are easily magnetized, and their magnetism is easily lost after magnetization. They are also easily demagnetized by striking and heating, and are widely used in electrical and electronic equipment. The most widely used soft magnetic material is iron-silicon alloy, which is used in the cores of electromagnets, electromagnetic relays, transformers, and motors, as well as various soft magnetic ferrites.

[0003] For example, the thermal cycling calcination equipment for soft magnetic ferrite materials disclosed in authorization announcement number CN220689721U uses a drive motor to rotate a first bevel gear, which in turn drives a second bevel gear to rotate. The second bevel gear then drives a connecting shaft to rotate, which in turn drives a calcination kiln to rotate. Simultaneously, the rotating balls in the groove inside the protective cylinder cooperate with the rotation of the calcination kiln, thereby assisting in the rotation of the calcination kiln and making it more labor-saving. The rotating calcination kiln drives the material inside to rotate and calcine, making the material more active during the calcination process, thus making the calcination of the material more complete and improving its quality. In short, it improves the efficiency of the material calcination process.

[0004] In the above, the material is in powder form, which may clump together during the calcination process, resulting in uneven heating of the material. Furthermore, centrifugal force during the rotation of the calcination equipment will cause uneven material distribution, leading to insufficient calcination. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a calcining furnace for soft magnetic oxygen materials that can heat more thoroughly.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A calcining furnace for soft magnetic oxide materials includes a furnace body with a cover and a mounting frame below it. The furnace body is internally equipped with a stirring device and a gas dispersion device.

[0008] The stirring device includes a stirring paddle, a hydraulic cylinder, a drive motor, an external magnetic ring, and an internal driven magnetic ring. The stirring paddle and the hydraulic cylinder are both located inside the calcining furnace. One end of the stirring paddle is rotatably connected to the output end of the hydraulic cylinder. The internal driven magnetic ring is fitted onto the outer peripheral wall of the stirring paddle and is fixedly connected to it.

[0009] The drive motor is located outside the calcining furnace body and is positioned corresponding to the stirring paddle. An external magnetic ring is fitted onto the output end of the drive motor, and a support frame connected to the ground is provided below the drive motor.

[0010] The gas dispersion device includes several nozzles, several solenoid valves, several pipelines and a gas box. The nozzles are evenly distributed inside the calcining furnace body. The calcining furnace body has air inlets corresponding to the nozzles. One end of the pipeline is connected to the gas box and the other end is connected to the nozzle. The solenoid valves are installed on the pipelines.

[0011] The present invention is further configured such that: the spray angle of the spray head is 30°-60°, the spray head adopts a porous structure, and the aperture is 0.5-2mm.

[0012] The present invention is further configured such that: the hydraulic cylinder is wrapped with a high-temperature sealing sleeve, which is made of a graphite and ceramic fiber composite material.

[0013] The present invention is further configured such that the extension and retraction stroke of the hydraulic cylinder is one-half to one-third of the diameter of the calcining furnace.

[0014] The present invention is further configured such that: a temperature sensor is provided inside the calcining furnace body, the temperature sensor is communicatively connected to a control panel, and the hydraulic cylinder, drive motor and solenoid valve are all communicatively connected to the control panel.

[0015] The present invention is further configured such that: the inner wall of the calcining furnace body is provided with a plurality of equally spaced spiral guide fins.

[0016] Compared with the shortcomings of the prior art, the beneficial effects of this utility model are as follows:

[0017] By setting the rotation and extension motion of the retractable stirring paddle, the materials in the calcination furnace are fully mixed, avoiding local overheating or agglomeration, ensuring uniform heating of the materials, making the calcination more uniform, and the grain size distribution more consistent; improving product consistency and pass rate, reducing the defect rate. Furthermore, the temperature sensor can dynamically adjust the paddle extension length and speed according to the calcination temperature and material state. Even further, the spiral guide fins can enhance the material tumbling effect, making the material heat up more uniformly. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0019] 1. Calcining furnace body; 2. Mounting frame; 3. Stirring paddle; 4. Hydraulic cylinder; 5. Drive motor; 6. External magnetic ring; 7. Internal driven magnetic ring; 8. Support frame; 9. Injector head; 10. Solenoid valve; 11. Pipeline; 12. Gas box; 13. High-temperature sealing sleeve; 14. Temperature sensor; 15. Spiral guide fins. Detailed Implementation

[0020] The technical solutions of the present 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 the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Working principle: During installation, the outer magnetic ring 6 and the inner driven magnetic ring 7 must be strictly coaxially aligned, with the deviation controlled within 0.1mm, to ensure the efficiency of magnetic field transmission.

[0023] Before use, the raw materials to be calcined are added into the calcining furnace body 1, and then the calcining furnace body 1 is sealed. Then, the hydraulic cylinder 4, drive motor 5 and solenoid valve 10 are started.

[0024] Hydraulic cylinder 4 drives stirring paddle 3 to adjust its length, stirring the raw materials placed inside the calcining furnace body 1. Simultaneously, spiral guide fins 15 located inside the calcining furnace body 1 enhance the material tumbling effect, resulting in more uniform heating. Drive motor 5 rotates, causing external magnetic ring 6 connected to it to rotate synchronously. The magnetic field of external magnetic ring 6 penetrates the calcining furnace body 1, driving internal driven magnetic ring 7 to rotate, thereby rotating stirring paddle 3 and stirring the raw materials.

[0025] Before entering the calcination furnace body 1, the gas is preheated to 300~500℃ to prevent cold airflow from affecting the calcination temperature. Through multiple pipes and solenoid valves 10, the gas flow and pressure of each injection head 9 are independently controlled. The gas enters the calcination furnace body 1, further fluidizing the material, enhancing the contact between the material and the heat source, improving the reaction activity, and making the material more uniform.

[0026] like Figure 1 As shown,

[0027] A calcining furnace for soft magnetic oxide materials includes a furnace body 1, a cover on the furnace body 1, a mounting bracket 2 below the furnace body 1, a temperature sensor 14 inside the furnace body 1, and a control panel connected to the temperature sensor 14. A hydraulic cylinder 4, a drive motor 5, and a solenoid valve 10 are all connected to the control panel. The temperature sensor 14 senses the temperature inside the furnace body 1 and feeds it back to the control panel. The control panel controls the working status of the hydraulic cylinder 4, the drive motor 5, and the solenoid valve 10.

[0028] The inner wall of the calcining furnace body 1 is provided with several equally spaced spiral guide fins 15, which can enhance the tumbling effect of raw materials and make the heating more complete.

[0029] The calcining furnace body 1 is equipped with a stirring device and a gas dispersion device.

[0030] The stirring device includes a stirring paddle 3, a hydraulic cylinder 4, a drive motor 5, an external magnetic ring 6, and an internal driven magnetic ring 7. The stirring paddle 3 is placed inside the calcining furnace body 1, and the hydraulic cylinder 4 is placed inside the calcining furnace body 1. One end of the stirring paddle 3 is rotatably connected to the output end of the hydraulic cylinder 4. The internal driven magnetic ring 7 is sleeved on the outer peripheral wall of the stirring paddle 3 and fixedly connected to the stirring paddle 3. Through the magnetic field cooperation between the external magnetic ring 6 and the internal driven magnetic ring 7, the stirring machine is driven to rotate, which can prevent the drive motor 5 from being damaged by high temperature.

[0031] The drive motor 5 is placed outside the calcining furnace body 1 and is positioned corresponding to the stirring paddle 3. The hydraulic cylinder 4 is wrapped with a high-temperature sealing sleeve 13, which is made of graphite and ceramic fiber composite material to protect the hydraulic cylinder 4 from the influence of high temperature on its working state.

[0032] The extension and retraction stroke of the hydraulic cylinder 4 is one-half to one-third of the diameter of the calcining furnace, ensuring that the stirring paddle 3 can fully stir the raw materials in the calcining furnace body 1.

[0033] An external magnetic ring 6 is fitted onto the output end of the drive motor 5. A support frame 8 connected to the ground is provided below the drive motor 5 to support the drive motor 5, so that the output end of the drive motor 5 and the calcining furnace body 1 are on the same horizontal line.

[0034] The gas dispersion device includes several injection heads 9, several solenoid valves 10, several pipelines 11 and a gas box 12. The injection heads 9 are evenly distributed inside the calcining furnace body 1. The injection angle of the injection heads 9 is 30°-60°. The injection heads 9 adopt a porous structure with a pore diameter of 0.5-2mm, which can ensure that the material is active and reacts fully during the calcination process.

[0035] The calcining furnace body 1 has an air inlet corresponding to the spray head 9. One end of the pipeline 11 is connected to the gas box 12 and the other end is connected to the spray head 9. The solenoid valve 10 is installed on the pipeline 11 to independently control the gas flow and pressure of each spray head 9. The gas enters the calcining furnace body 1 to further fluidize the material, enhance the contact between the material and the heat source, improve the reaction activity, and make the material more uniform.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A calcining furnace for soft magnetic oxide materials, comprising a furnace body (1), a cover on the furnace body (1), and a mounting frame (2) below the furnace body (1), characterized in that: The calcining furnace body (1) is internally equipped with a stirring device and a gas dispersion device. The stirring device includes a stirring paddle (3), a hydraulic cylinder (4), a drive motor (5), an external magnetic ring (6), and an internal driven magnetic ring (7). The stirring paddle (3) is placed inside the calcining furnace body (1), and the hydraulic cylinder (4) is placed inside the calcining furnace body (1). One end of the stirring paddle (3) is rotatably connected to the output end of the hydraulic cylinder (4). The internal driven magnetic ring (7) is sleeved on the outer peripheral wall of the stirring paddle (3) and fixedly connected to the stirring paddle (3). The drive motor (5) is placed outside the calcining furnace body (1) and is positioned corresponding to the stirring paddle (3). An external magnetic ring (6) is fitted onto the output end of the drive motor (5). A support frame (8) connected to the ground is provided below the drive motor (5). The gas dispersion device includes several nozzles (9), several solenoid valves (10), several pipelines (11) and a gas box (12). Several nozzles (9) are evenly distributed in the calcining furnace body (1). The calcining furnace body (1) has air inlets corresponding to the nozzles (9). One end of the pipeline (11) is connected to the gas box (12) and the other end is connected to the nozzles (9). The solenoid valves (10) are installed on the pipeline (11).

2. The calcining furnace for soft magnetic oxide materials according to claim 1, characterized in that: The spray angle of the spray head (9) is 30°-60°, and the spray head (9) adopts a porous structure with a hole diameter of 0.5-2mm.

3. The calcining furnace for soft magnetic oxide materials according to claim 1, characterized in that: The hydraulic cylinder (4) is wrapped with a high-temperature sealing sleeve (13), which is made of graphite and ceramic fiber composite material.

4. The calcining furnace for soft magnetic oxide materials according to claim 1, characterized in that: The extension and retraction stroke of the hydraulic cylinder (4) is one-half to one-third of the diameter of the calcining furnace.

5. A calcining furnace for soft magnetic oxide materials according to claim 1, characterized in that: The calcining furnace body (1) is equipped with a temperature sensor (14), which is connected to a control panel. The hydraulic cylinder (4), drive motor (5) and solenoid valve (10) are all connected to the control panel.

6. The calcining furnace for soft magnetic oxide materials according to claim 1, characterized in that: The inner wall of the calcining furnace body (1) is provided with several equally spaced spiral guide fins (15).

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