High-temperature-resistant composite permanent magnet sintering device

Abstract

The utility model relates to the technical field of sintering devices, in particular to a high-temperature-resistant composite permanent magnet sintering device which comprises an outer box body, and a preheating cavity used for preheating a permanent magnet just entering the outer box body is arranged at the upper end of the inner side of the outer box body. A sintering cavity used for conducting high-temperature sintering on the permanent magnet is formed in the middle end of the inner side of the outer box body. The lower end of the inner side of the outer box body is provided with a cooling cavity used for evenly cooling the permanent magnet to be output from the outer box body. By means of the three-layer structure of the outer box body, high-temperature heat generated in the sintering process is effectively prevented from being dissipated outwards; by putting the permanent magnet to be sintered into the preheating cavity, the temperature of the permanent magnet can be quickly and uniformly increased, so that the permanent magnet reaches the preheating temperature required by sintering; the permanent magnet falls into the cooling cavity, heat in the cooling cavity can be rapidly and effectively taken away, it is guaranteed that the permanent magnet cannot crack or deform due to temperature shock in the cooling process, and heated cold water can also be utilized after being output.

Description

Technical Field

[0001] This utility model relates to the field of sintering equipment technology, and in particular to a high-temperature resistant composite permanent magnet sintering equipment. Background Technology

[0002] Rare earth permanent magnet materials, especially sintered NdFeB permanent magnets, are widely used in various fields such as electronic computers, generator sets, audio equipment, network communication equipment and aerospace due to their excellent magnetic properties. With the advancement of science and technology and the development of industry, the performance requirements for rare earth permanent magnet materials are also getting higher and higher, especially in terms of stability and corrosion resistance in high-temperature environments.

[0003] In existing sintering equipment, the single-layer structure of the outer casing results in poor heat preservation, causing a large amount of heat to be lost into the environment. This not only reduces sintering efficiency but also increases energy consumption. Furthermore, during the sintering process, the residual heat in the sintering chamber is often directly discharged into the environment, which not only affects the surrounding environment but also wastes energy. In addition, during the sintering process, the large temperature difference when the permanent magnet enters and exits the equipment can easily cause cracks or deformation in the permanent magnet. Utility Model Content

[0004] In order to overcome the problems of existing sintering equipment having a single-layer structure, resulting in large heat loss and energy waste during sintering, and the direct discharge of waste heat generated during sintering, which also leads to energy waste, and the large temperature difference when the permanent magnet enters and exits the equipment during sintering, which has a great impact on the quality of the permanent magnet.

[0005] The technical solution is as follows: A high-temperature resistant composite permanent magnet sintering device includes an outer casing. A preheating chamber is located at the upper end of the inner side of the outer casing for preheating the permanent magnets that have just entered the outer casing. A sintering chamber is located at the middle end of the inner side of the outer casing for high-temperature sintering of the permanent magnets. A cooling chamber is located at the lower end of the inner side of the outer casing for uniformly cooling the permanent magnets that are about to exit the outer casing. The preheating chamber and the sintering chamber are separated by a first partition. The sintering chamber and the cooling chamber are separated by a second partition. Hot gas upward transport pipes for conveying residual heat from the sintering chamber are installed at the front ends of the preheating chamber and the sintering chamber. Symmetrical cooling water pipes are installed inside the cooling chamber.

[0006] Furthermore, the outer casing has a three-layer structure, consisting of a high-temperature resistant inner layer, a heat-insulating middle layer, and a heat-insulating outer layer, from the inside out.

[0007] Furthermore, the first partition, the second partition, and the bottom of the outer casing all adopt a flow-guiding structure that is high at both ends and low in the middle.

[0008] Furthermore, limiting slides fixed to the inner wall of the outer casing are provided at the junction of the preheating chamber and the sintering chamber, and at the junction of the sintering chamber and the cooling chamber; the limiting slides are slidably connected to the first partition and the second partition, respectively.

[0009] Furthermore, the rear ends of the first and second partitions are respectively fixedly connected to independent linkage plates; symmetrical push cylinders are installed on the outer side of the outer casing; the piston rod of the push cylinder is fixedly connected to the connecting lug of the linkage plate.

[0010] Furthermore, a waste heat recovery fan is installed inside the hot gas conveying pipe to transport the waste heat of the sintering chamber to the upper preheating chamber; a baffle is installed at the end of the hot gas conveying pipe near the sintering chamber to filter dust.

[0011] Furthermore, the cooling water pipes are made of metal heat-conducting material; both ends of the cooling water pipes are equipped with interfaces for connecting external cold water and outputting hot water; the cooling water pipes are distributed in a "U" shaped path within the cooling chamber.

[0012] The beneficial effects are as follows: This utility model, through the three-layer structure of the outer casing, effectively prevents the high-temperature heat generated during sintering from dissipating outward, which not only improves sintering efficiency but also reduces energy consumption and production costs. By placing the permanent magnet to be sintered into the preheating chamber and activating the hot gas supply pipeline to preheat the permanent magnet, the temperature of the permanent magnet can be rapidly and uniformly increased to reach the preheating temperature required for sintering, laying a good foundation for the subsequent high-temperature sintering process. After preheating, the permanent magnet falls into the sintering chamber for high-temperature sintering. Then, the permanent magnet falls into the cooling chamber. The front and rear ends of the cooling water pipe are connected to the cold water source and the hot water output, respectively. Utilizing the thermal conductivity of the metal in the cooling water pipe, the cold water passing through it uniformly cools the permanent magnet. This cooling method can quickly and effectively remove the heat in the cooling chamber, ensuring that the permanent magnet will not crack or deform due to sudden temperature changes during the cooling process. The heated cold water can also be used after being output. Attached Figure Description

[0013] Figure 1 This is a frontal perspective view of the present invention.

[0014] Figure 2 This is a three-dimensional schematic diagram of the rear structure of this utility model;

[0015] Figure 3 This is a cross-sectional three-dimensional structural diagram of the present invention;

[0016] Figure 4 This is a three-dimensional structural diagram of the hot gas conveying pipeline of this utility model;

[0017] Figure 5 This is a three-dimensional structural diagram of the cooling chamber of this utility model;

[0018] Figure 6 This is a schematic diagram of the internal three-dimensional structure of the outer casing of this utility model.

[0019] In the attached diagram, the following are the reference numerals: 1. Outer casing; 2. Preheating chamber; 3. Sintering chamber; 4. Cooling chamber; 5. First partition; 6. Second partition; 7. Hot gas supply pipe; 8. Cooling water pipe; 9. High-temperature inner layer; 10. Insulation middle layer; 11. Insulation outer layer; 12. Limiting slide; 13. Linkage plate; 14. Push cylinder; 15. Baffle; 16. Waste heat recovery fan; 17. Interface. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0021] Example 1

[0022] like Figures 1-6 As shown, the high-temperature resistant composite permanent magnet sintering device includes an outer casing 1. A preheating chamber 2 is located at the upper end of the inner side of the outer casing 1 for preheating the permanent magnets that have just entered the outer casing 1. A sintering chamber 3 is located at the middle end of the inner side of the outer casing 1 for high-temperature sintering of the permanent magnets. A cooling chamber 4 is located at the lower end of the inner side of the outer casing 1 for uniformly cooling the permanent magnets that are about to exit the outer casing 1. The preheating chamber 2 and the sintering chamber 3 are separated by a first partition 5. The sintering chamber 3 and the cooling chamber 4 are separated by a second partition 6. Hot gas upward conveying pipes 7 are installed at the front ends of the preheating chamber 2 and the sintering chamber 3 to transport the residual heat in the sintering chamber 3 upwards. Symmetrical cooling water pipes 8 are installed inside the cooling chamber 4.

[0023] The permanent magnet to be sintered is placed in the preheating chamber 2, and the hot gas supply pipe 7 of the preheating chamber 2 is started to preheat the permanent magnet to reach the preheating temperature required for sintering. After preheating, the permanent magnet falls into the sintering chamber 3, and the high-temperature sintering equipment in the sintering chamber 3 is started to sinter the permanent magnet at high temperature. During the sintering process, the hot gas supply pipe 7, which is in operation, transports the residual heat in the sintering chamber 3 upward to the preheating chamber 2. After sintering, the sintered permanent magnet falls into the cooling chamber 4, and the cold water passing through it cools the permanent magnet evenly to remove the heat in the cooling chamber 4.

[0024] Please see Figure 2 In this embodiment, the rear ends of the first partition 5 and the second partition 6 are respectively fixedly connected to independent linkage plates 13; the outer side of the outer housing 1 is equipped with left and right symmetrical push cylinders 14; the piston rod of the push cylinder 14 is fixedly connected to the connecting ear of the linkage plate 13, and there are two linkage plates 13. The independent movement of the first partition 5 and the second partition 6 is controlled by the push cylinder 14 to realize the permanent magnet falling step by step.

[0025] Please see Figure 3In this embodiment, the first partition 5, the second partition 6, and the bottom of the outer casing 1 all adopt a flow-guiding structure with high ends on the left and right and low ends in the middle. The flow-guiding structure of the first partition 5, the second partition 6, and the bottom of the outer casing 1 allows the permanent magnet to be guided to the middle, limiting the position of the permanent magnet and preventing it from rolling left and right. Limiting slides 12 fixed to the inner wall of the outer casing 1 are provided at the junction of the preheating chamber 2 and the sintering chamber 3, and the sintering chamber 3 and the cooling chamber 4. The limiting slides 12 are slidably connected to the first partition 5 and the second partition 6 respectively. The limiting slides 12 restrict the sliding path of the first partition 5 and the second partition 6 and support the first partition 5 and the second partition 6 to ensure the stability of the first partition 5 and the second partition 6 during operation.

[0026] Please see Figure 4 In this embodiment, a waste heat recovery fan 16 is provided inside the hot gas conveying pipe 7 to transport the waste heat of the sintering chamber 3 to the upper preheating chamber 2; a baffle 15 for filtering dust is provided at the end of the hot gas conveying pipe 7 near the sintering chamber 3; the permanent magnet to be sintered is placed in the preheating chamber 2, and the hot gas conveying pipe 7 and the waste heat recovery fan 16 of the preheating chamber 2 are started to transport the waste heat in the sintering chamber 3 to the upper preheating chamber 2 after being filtered by the baffle 15, so as to preheat the permanent magnet to reach the preheating temperature required for sintering.

[0027] Please see Figure 5 In this embodiment, the cooling water pipe 8 is made of a metal thermally conductive material; both ends of the cooling water pipe 8 are provided with interfaces 17 for connecting external cold water and outputting hot water; the cooling water pipe 8 is distributed in a "U" shaped path in the cooling chamber 4; the front and rear ends of the cooling water pipe 8 are connected to the cold water source and the hot water output respectively. Through the metal thermal conductivity of the cooling water pipe 8 and the "U" shaped path distribution, the cold water passing through it absorbs the heat of the cooling chamber 4, and uniformly cools the permanent magnet.

[0028] Please see Figure 6 In this embodiment, the outer casing 1 has a three-layer structure, consisting of a high-temperature resistant inner layer 9, a heat-insulating middle layer 10, and a heat-insulating outer layer 11 from the inside out. The outer casing 1 of the sintering device adopts a three-layer structure, including a high-temperature resistant inner layer 9, a heat-insulating middle layer 10, and a heat-insulating outer layer 11. This multi-layer composite structure design makes the outer casing 1 of the permanent magnet sintering device more heat-insulating and heat-resistant, and greatly reduces the heat loss of the sintering device.

[0029] When using this sintering device, the outer casing 1 of the sintering device adopts a three-layer structure, including a high-temperature resistant inner layer 9, a heat-insulating middle layer 10, and a heat-insulating outer layer 11. This multi-layer composite structure design greatly reduces the heat loss of the sintering device.

[0030] The permanent magnet to be sintered is placed in the preheating chamber 2, and the hot gas supply pipe 7 of the preheating chamber 2 is started to preheat the permanent magnet to reach the preheating temperature required for sintering.

[0031] After preheating, the cylinder 14 drives the linkage plate 13 to move the first partition 5, so that the preheating chamber 2 is connected to the sintering chamber 3. The permanent magnet falls into the sintering chamber 3, the first partition 5 is reset, and the high-temperature sintering equipment in the sintering chamber 3 is started to perform high-temperature sintering treatment on the permanent magnet. During the sintering process, the hot gas pipeline 7 and the waste heat recovery fan 16, which are in operation, transport the waste heat in the sintering chamber 3 upward to the preheating chamber 2 to improve energy utilization.

[0032] After sintering, the cylinder 14 drives the linkage plate 13 to move the second partition 6, so that the sintering chamber 3 and the cooling chamber 4 are connected. The sintered permanent magnet falls into the cooling chamber 4, the second partition 6 is reset, and the front and rear ends of the cooling water pipe 8 are connected to the cold water source and the hot water output, respectively. Through the thermal conductivity of the metal of the cooling water pipe 8, the cold water passing through it is used to uniformly cool the permanent magnet to remove the heat in the cooling chamber 4. After cooling, the sealing cover at the bottom of the outer casing 1 is opened and the cooled permanent magnet is taken out.

Claims

1. A high-temperature resistant composite permanent magnet sintering device, comprising an outer casing (1); characterized in that: A preheating chamber (2) is provided at the upper end of the inner side of the outer casing (1) for preheating the permanent magnet that has just entered the outer casing (1); a sintering chamber (3) is provided at the middle end of the inner side of the outer casing (1) for high-temperature sintering of the permanent magnet; a cooling chamber (4) is provided at the lower end of the inner side of the outer casing (1) for uniformly cooling the permanent magnet that is about to be output from the outer casing (1); the preheating chamber (2) and the sintering chamber (3) are separated by a first partition (5); the sintering chamber (3) and the cooling chamber (4) are separated by a second partition (6); hot gas conveying pipes (7) for conveying the residual heat in the sintering chamber (3) upward are installed at the front ends of the preheating chamber (2) and the sintering chamber (3); and symmetrical cooling water pipes (8) are installed on the inner side of the cooling chamber (4).

2. The high-temperature resistant composite permanent magnet sintering device according to claim 1, characterized in that, The outer casing (1) has a three-layer structure, from the inside to the outside: a high-temperature resistant inner layer (9), a heat-insulating middle layer (10), and a heat-insulating outer layer (11).

3. The high-temperature resistant composite permanent magnet sintering device according to claim 1, characterized in that, The first partition (5), the second partition (6), and the bottom of the outer casing (1) all adopt a flow guiding structure with high left and right ends and low middle.

4. The high-temperature resistant composite permanent magnet sintering device according to claim 1, characterized in that, The preheating chamber (2) and the sintering chamber (3), and the sintering chamber (3) and the cooling chamber (4) are all provided with limiting slides (12) fixed to the inner wall of the outer box (1); the limiting slides (12) are slidably connected to the first partition (5) and the second partition (6) respectively.

5. The high-temperature resistant composite permanent magnet sintering apparatus according to claim 1, characterized in that, The rear ends of the first partition (5) and the second partition (6) are respectively fixedly connected to independent linkage plates (13); the outer casing (1) is equipped with left and right symmetrical push cylinders (14); the piston rod of the push cylinder (14) is fixedly connected to the connecting lug of the linkage plate (13).

6. The high-temperature resistant composite permanent magnet sintering device according to claim 1, characterized in that, The hot gas conveying pipe (7) is equipped with a waste heat recovery fan (16) for conveying the waste heat of the sintering chamber (3) to the upper preheating chamber (2); a baffle (15) for filtering dust is provided at the end of the hot gas conveying pipe (7) near the sintering chamber (3).

7. The high-temperature resistant composite permanent magnet sintering device according to claim 1, characterized in that, The cooling water pipe (8) is made of metal heat-conducting material; both ends of the cooling water pipe (8) are provided with interfaces (17) for connecting external cold water and outputting hot water; the cooling water pipe (8) is distributed in a "U" shaped path in the cooling chamber (4).

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