Rare earth permanent magnet powder rapid quenching temperature regulation and control device

Abstract

The utility model discloses a rare earth permanent magnetic powder rapid quenching temperature regulation and control device, which belongs to the technical field of rare earth permanent magnetic powder rapid quenching, and comprises a cooling box, a first water pump and a cooling box, a filtering device used for double-layer filtering of a cooling medium containing metal oxide is connected in the cooling box in a penetrating manner, and a water suction pipe is connected in the filtering device in a penetrating manner. According to the cooling device, after the first water pump is started, the first water pump sucks the vacuum box, so that a negative pressure state is formed in the vacuum box, a pipeline located in the vacuum box is promoted to suck a cooling medium in the cooling box, and the medium flows back to the cooling box through the vacuum box, the water suction pipe and the water outlet pipe; the medium flowing into the cooling box achieves cold conduction through the bearing plate under the cold source effect of the ice blocks in the upper frame body, so that the temperature of the medium is effectively reduced, meanwhile, the refrigerator conducts constant-temperature control over the interior of the frame body, the ice blocks are prevented from being melted in advance, and the continuous and stable cooling effect is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of rapid quenching technology of rare earth permanent magnet powder, and particularly relates to a rapid quenching temperature control device for rare earth permanent magnet powder. Background Technology

[0002] Rapid quenching of rare earth permanent magnet powder is a key process for rapidly cooling molten rare earth permanent magnet alloys (such as NdFeB) into powder or strip in a very short time. High cooling rates are usually achieved through methods such as copper wheel rapid quenching, water rapid quenching, or gas atomization to obtain fine grains or amorphous or nanocrystalline structures, thereby improving magnetic properties such as coercivity and remanence. This process is extremely sensitive to temperature control and requires a high-precision temperature control system to ensure a stable and consistent cooling process. It is one of the core steps in the preparation of high-performance rare earth permanent magnet materials.

[0003] In practical implementation, the existing technology has the following problems in the actual application of the water rapid quenching process for rare earth permanent magnet powder: After each quenching, the temperature of the cooling medium rises significantly. If it is not cooled down in time, it will affect the cooling rate and microstructure formation in the subsequent quenching process, making it difficult to obtain the ideal magnetic properties stably. At the same time, during the quenching process, after the molten alloy comes into contact with the cooling water, metal slag or oxides are easily generated and deposited at the bottom of the pool, which leads to an increase in the concentration of impurities in the water. Long-term operation will affect the rapid quenching effect and the stability of the water circulation system.

[0004] Based on this, this utility model designs a rapid quenching temperature control device for rare earth permanent magnet powder to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to address the following problems in the practical application of the water rapid quenching process for rare earth permanent magnet powder in the prior art: after each quenching, the temperature of the cooling medium rises significantly. If it is not cooled down in time, it will affect the cooling rate and microstructure formation in the subsequent quenching process, making it difficult to obtain the ideal magnetic properties stably. At the same time, during the quenching process, after the molten alloy comes into contact with the cooling water, metal slag or oxides are easily generated and deposited at the bottom of the pool, leading to an increase in the concentration of impurities in the water. Long-term operation will affect the rapid quenching effect and the stability of the water circulation system. Therefore, a rapid quenching temperature control device for rare earth permanent magnet powder is proposed.

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

[0007] A rapid quenching temperature control device for rare earth permanent magnet powder includes a cooling box, a first water pump, and a cooling chamber. A filter device for double-layer filtration of a cooling medium containing metal oxides is connected through the cooling box. A water suction pipe is connected through the filter device and is fixedly connected to the input end of the first water pump. An outlet pipe is fixedly connected to the output end of the first water pump and is connected through the cooling chamber. A refrigeration device for lowering the water temperature is fixedly connected to the cooling chamber. A common return pipe connects the cooling chamber and the cooling box. A second water pump is installed inside the cooling chamber, and the return pipe is fixedly connected to the output end of the second water pump.

[0008] As a further description of the above technical solution:

[0009] The refrigeration device includes a frame, which is fixedly connected to the top of the cooling box, and a common support plate for storing ice is fixedly connected between the frame and the cooling box.

[0010] As a further description of the above technical solution:

[0011] A top plate is fitted onto the frame, and several acrylic plates are installed inside the frame. A cooler is installed below the top plate.

[0012] As a further description of the above technical solution:

[0013] The receiving plate is configured as a plate with a certain degree of heat conduction.

[0014] As a further description of the above technical solution:

[0015] The filtration device includes a vacuum chamber, through which a pipe is connected. The pipe is connected to a cooling box. An installation slot is provided inside the vacuum chamber, and an installation plate is fixedly connected inside the vacuum chamber. Several filter plates are clamped between the installation slot and the installation plate.

[0016] As a further description of the above technical solution:

[0017] Several filter plates surround the pipe, and the filter plates form a two-layer filtration system.

[0018] As a further description of the above technical solution:

[0019] The vacuum chamber is fitted with a sealing cover for easy cleaning of the filter plates, and the sealing cover is equipped with a handle.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0021] 1. In this utility model, after the first water pump is started, the first water pump draws suction from the vacuum box, creating a negative pressure state inside the vacuum box. This causes the pipes located inside the vacuum box to draw the cooling medium from the cooling box. The medium flows back to the cooling box through the vacuum box, the suction pipe, and the outlet pipe. The medium flowing into the cooling box is cooled by the ice in the upper frame and then conducts heat through the receiving plate, thereby effectively reducing the temperature of the medium. At the same time, the refrigerator maintains a constant temperature inside the frame to prevent the ice from melting prematurely and ensure a continuous and stable cooling effect.

[0022] 2. In this utility model, during the process of the medium flowing into the vacuum box, it is filtered in stages by two layers of filter plates set inside, which effectively prevents metal slag and oxides from entering the cooling box, ensuring the cleanliness of the circulating medium and the operational stability of the system. When the filter plates reach the replacement cycle, it is only necessary to open the cover plate on the vacuum box, pull the filter plate to take it out, and install the new filter plates in the mounting slot and mounting plate respectively. The operation is simple and the maintenance efficiency is high. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural schematic diagram of a rapid quenching temperature control device for rare earth permanent magnet powder proposed in this utility model.

[0024] Figure 2 This is a schematic diagram of the structure of a rare earth permanent magnet powder rapid quenching temperature control device with the frame and cooling box separated according to the present invention.

[0025] Figure 3 This is a three-dimensional structural diagram of a rare earth permanent magnet powder rapid quenching temperature control device and a filter device proposed in this utility model.

[0026] Figure 4 This utility model proposes a rapid quenching temperature control device for rare earth permanent magnet powder. Figure 3 An enlarged structural diagram of part A in the middle.

[0027] Legend:

[0028] 1. Cooling box; 2. Suction pipe; 3. First water pump; 4. Outlet pipe; 5. Cooling box; 6. Refrigeration unit; 61. Frame; 62. Support plate; 63. Acrylic plate; 64. Top plate; 65. Refrigerator; 7. Filter device; 71. Vacuum box; 72. Pipe; 73. Mounting slot; 74. Mounting plate; 75. Filter plate; 8. Return pipe; 9. Second water pump. Detailed Implementation

[0029] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figures 1-4 ;

[0031] First embodiment:

[0032] This utility model provides a technical solution: a rapid quenching temperature control device for rare earth permanent magnet powder, including a cooling box 1, a first water pump 3, and a cooling tank 5. A filter device 7 for double-layer filtration of a cooling medium containing metal oxides is connected through the cooling box 1. A water suction pipe 2 is connected through the filter device 7. The water suction pipe 2 is fixedly connected to the input end of the first water pump 3. A water outlet pipe 4 is fixedly connected to the output end of the first water pump 3. The water outlet pipe 4 is connected through the cooling tank 5. A refrigeration device 6 for lowering the water temperature is fixedly connected to the cooling tank 5. A return pipe 8 is connected through the cooling tank 5 and the cooling box 1. A second water pump 9 is installed in the cooling tank 5, and the return pipe 8 is fixedly connected to the output end of the second water pump 9.

[0033] Specifically, such as Figure 2 As shown, the refrigeration device 6 includes a frame 61, which is fixedly connected above the cooling box 5. A common support plate 62 for storing ice is fixedly connected between the frame 61 and the cooling box 5. A top plate 64 is fitted onto the frame 61, and several acrylic plates 63 are provided inside the frame 61. A cooler 65 is installed below the top plate 64. The support plate 62 is designed to have a certain degree of thermal conductivity. The frame 61 is installed above the cooling box 5, and the support plate 62 is placed between the two to form a closed cooling module. The support plate 62 serves as a platform for supporting the ice and has good thermal conductivity, allowing the low temperature generated by the ice to pass through... The receiving plate 62 efficiently conducts heat to the circulating medium in the cooling box 5, achieving rapid cooling. Through this structural connection, a stable heat exchange path is formed between the cold source and the cooling medium, improving temperature control efficiency and cooling uniformity. Several acrylic plates 63 are installed inside the frame 61, allowing for easy observation of the ice's state. Meanwhile, the cooler 65 is installed below the top plate 64. By maintaining a constant temperature within the frame 61, the melting rate of the ice is slowed down, extending the effective usage time of the cold source. This structural combination helps stabilize the cooling effect, reduce energy consumption, and minimize temperature fluctuations during continuous operation of the cooling system.

[0034] During operation, after the first water pump 3 is started, it draws water from the vacuum box 71, creating a negative pressure inside the vacuum box 71. This causes the pipe 72 inside the vacuum box 71 to draw the cooling medium from the cooling box 5. The medium flows back to the cooling box 5 through the vacuum box 71, the suction pipe 2, and the outlet pipe 4. The medium flowing into the cooling box 5 is cooled by the ice in the upper frame 61 and then conducts heat through the receiving plate 62, effectively reducing the temperature of the medium. At the same time, the cooler 65 maintains a constant temperature inside the frame 61 to prevent the ice from melting prematurely and ensure a continuous and stable cooling effect.

[0035] Second embodiment:

[0036] Specifically, such as Figures 3-4 As shown, the filtration device 7 includes a vacuum box 71, through which a pipe 72 is connected. The pipe 72 is connected to the cooling box 1. An installation groove 73 is provided inside the vacuum box 71, and an installation plate 74 is fixedly connected inside the vacuum box 71. Several filter plates 75 are clamped between the installation groove 73 and the installation plate 74. The filter plates 75 surround the pipe 72 and form a two-layer filtration. A sealing cover plate for easy cleaning of the filter plates 75 is clamped on the top of the vacuum box 71, and the sealing cover plate is provided with a handle. The medium in the cooling box 1 enters the vacuum box 71 through the suction pipe 2 under the suction action of the first water pump 3, and is treated for impurities by the internal filter plates 75. This structure realizes the integrated treatment of water circulation, suction, purification and transmission. Combined with the negative pressure characteristics of the vacuum box 71, it improves the water pumping efficiency and impurity interception capacity, ensuring the cleanliness of the medium and the stability of the cooling performance in the subsequent cooling system.

[0037] During operation, as the medium flows into the vacuum chamber 71, it undergoes graded filtration through two layers of filter plates 75 installed inside, effectively preventing metal slag and oxides from entering the cooling chamber 5, ensuring the cleanliness of the circulating medium and the operational stability of the system. When the filter plates 75 reach their replacement cycle, simply open the cover plate on the vacuum chamber 71, pull out the filter plates 75, and install the new filter plates 75 in the mounting slots 73 and mounting plates 74 respectively. The operation is simple and the maintenance efficiency is high.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A rapid quenching temperature control device for rare earth permanent magnet powder, comprising a cooling box (1), a first water pump (3), and a cooling tank (5), characterized in that, A filter device (7) for double-layer filtration of cooling medium containing metal oxides is connected through the cooling box (1). A water suction pipe (2) is connected through the filter device (7). The water suction pipe (2) is fixedly connected to the input end of the first water pump (3). A water outlet pipe (4) is fixedly connected to the output end of the first water pump (3). The water outlet pipe (4) is connected through the cooling box (5). A refrigeration device (6) for reducing water temperature is fixedly connected to the cooling box (5). The same return pipe (8) is connected through the cooling box (5) and the cooling box (1). A second water pump (9) is installed in the cooling box (5), and the return pipe (8) is fixedly connected to the output end of the second water pump (9).

2. The rapid quenching temperature control device for rare earth permanent magnet powder according to claim 1, characterized in that, The refrigeration device (6) includes a frame (61) which is fixedly connected above the cooling box (5). The frame (61) and the cooling box (5) are fixedly connected to the same support plate (62) for storing ice.

3. The rapid quenching temperature control device for rare earth permanent magnet powder according to claim 2, characterized in that, A top plate (64) is attached to the frame (61), and several acrylic plates (63) are provided inside the frame (61). A cooler (65) is installed below the top plate (64).

4. The rapid quenching temperature control device for rare earth permanent magnet powder according to claim 2, characterized in that, The receiving plate (62) is configured as a plate with certain heat conduction properties.

5. The rapid quenching temperature control device for rare earth permanent magnet powder according to claim 1, characterized in that, The filtration device (7) includes a vacuum box (71), a pipe (72) is connected through the vacuum box (71), the pipe (72) is connected through the cooling box (1), an installation groove (73) is provided in the vacuum box (71), an installation plate (74) is fixedly connected in the vacuum box (71), and several filter plates (75) are clamped between the installation groove (73) and the installation plate (74).

6. The rapid quenching temperature control device for rare earth permanent magnet powder according to claim 5, characterized in that, Several filter plates (75) surround the pipe (72), and the several filter plates (75) form a two-layer filter.

7. The rapid quenching temperature control device for rare earth permanent magnet powder according to claim 5, characterized in that, The vacuum chamber (71) is fitted with a sealing cover plate that facilitates cleaning of the filter plate (75), and the sealing cover plate is provided with a handle.

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