Neodymium-iron-boron powder preparation device and method

Abstract

The application discloses a neodymium-iron-boron powder preparation device and method, and relates to the technical field of neodymium-iron-boron powder preparation.The application comprises a base, a fixed plate is arranged on the top right side of the base, a motor is arranged on the left side of the fixed plate, the motor has a variable speed function, two arc surface support plates are symmetrically arranged on the top of the base, arc grooves are formed in the interiors of the two arc surface support plates, a plurality of friction rollers are arranged in the interiors of the arc grooves of the arc surface support plates, a preparation assembly is arranged in the interior of the arc surface support plate, the preparation assembly is fixedly connected to the left side of the output end of the motor, and a sealing door is arranged on the top of the preparation assembly.The application effectively expands the activity range of the heating assembly, the heat energy emitted by the heating assembly is used for heating the interior of the conveying pipe, the moisture eroding the raw materials is evaporated in time, the neodymium-iron-boron raw materials are prevented from being eroded by the moisture and corroded during the preparation process, and the magnetism and use performance of the neodymium-iron-boron are prevented from being reduced.

Description

Technical Field

[0001] This invention relates to the field of neodymium iron boron powder preparation technology, specifically to a neodymium iron boron powder preparation apparatus and preparation method. Background Technology

[0002] Neodymium iron boron (NdFeB) is a rare-earth permanent magnet material with extremely high magnetic energy product and coercivity. Its high energy density has led to its widespread application in modern industry and electronics. However, the production process of NdFeB requires it to be prepared into powder, so the processing technology is constantly being optimized with the development of science and technology.

[0003] Patent publication number CN114918010B discloses a neodymium iron boron (NdFeB) powder preparation device. This device provides a method for preparing NdFeB powder by rotating a material carrier to drive the NdFeB particles in a rotating manner, while simultaneously grinding the NdFeB particles with grinding balls. The device includes a base frame, surrounding plates, arc-shaped connecting plates, a worktable, a swaying mechanism, and a feeding mechanism. Surround plates are connected to both sides of the base frame, and the worktable is connected to the top of the base frame. Arc-shaped connecting plates are connected to the lower front and rear sides of the surrounding plates and the base frame. A swaying mechanism for grinding NdFeB particles is provided on the worktable, and a feeding mechanism for feeding the particles is provided on the swaying mechanism. The material carrier between the upper parts of the two rounded plates in this patent allows for continuous rotation and material transport of the NdFeB particles, while simultaneously enabling the grinding balls to rotate and grind the NdFeB particles, thereby improving the preparation efficiency of this patent.

[0004] However, the device still has shortcomings: while it can improve the preparation efficiency through rotary grinding, when the neodymium iron boron raw material blocks are cold-started and ground, the neodymium iron boron powder is easily corroded by moisture during the preparation process as the high-speed rotation causes the neodymium iron boron to be gradually ground from a block to a powder. This corrosion can also reduce the magnetic properties of the neodymium iron boron. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a neodymium iron boron powder preparation apparatus and method, solving the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a neodymium iron boron powder preparation device, comprising a base, a fixing plate on the top right side of the base, a motor on the left side of the fixing plate, the motor having a variable speed function, two arc-shaped support plates symmetrically arranged on the top of the base, each arc-shaped support plate having an arc groove inside, a plurality of friction rollers arranged inside the arc groove of the arc-shaped support plate, a preparation component arranged inside the arc-shaped support plate, the right side of the preparation component being fixedly connected to the left side of the motor output end, and a sealing door being provided on the top of the preparation component; An anti-corrosion device is provided on the left side of the preparation component, an anti-mixing device is provided inside the anti-corrosion device, and an anti-backflow device is provided on the right side of the anti-mixing device. The anti-corrosion device includes a conveying pipe, the right side of which is rotatably mounted on the left side of the preparation component, and the right side of the conveying pipe is connected to the left side of the preparation component. A feeding component is fixedly mounted on the top left side of the base, and the feeding component has a feeding port inside. An electric rotating rod is rotatably mounted on the left side of the inner wall of the conveying pipe. A reciprocating spiral groove is formed on the outer wall of the left end of the electric rotating rod. A spiral conveying plate is fixedly mounted on the outer wall of the right end of the electric rotating rod. A sliding ring is movably mounted through the outer wall of the reciprocating spiral groove of the electric rotating rod. Several connecting rods are fixedly mounted at equal intervals on the outer wall of the sliding ring. A heating component is fixedly mounted on the end of the connecting rod away from the sliding ring. An L-shaped rod is fixedly mounted through the top of the heating component. A baffle is hinged to the left side of the inner wall of the feeding port of the feeding component by a torsion spring. A sliding block is slidably mounted on the side of the baffle near the L-shaped rod.

[0007] According to the above technical solution, the outer wall of the conveying pipe is fixedly installed inside the feeding assembly, the outer wall of the heating assembly is slidably installed on the inner wall of the conveying pipe, the top right end of the L-shaped rod movably penetrates the inside of the feeding assembly, and the left side of the outer wall of the sliding block is hinged to the top right end of the L-shaped rod. After the grinding balls are placed into the preparation assembly through the sealing door, the sealing door is closed to create a sealed space in the preparation assembly. Then, the NdFeB raw material is placed into the conveying pipe through the feed port of the feeding assembly. Before this, the electric rotary rod is started, and the rotation of the electric rotary rod drives the spiral conveyor plate to rotate. When the feeding is completed, the motor is started. When the output end of the motor drives the preparation assembly to rotate, the grinding balls inside the preparation assembly rotate synchronously to grind the raw material into powder; at the same time, the electric... When the rotating rod rotates, the reciprocating spiral groove on its outer wall restricts the sliding ring's internal locking block, causing the sliding ring to slide to the right and reset along its outer wall when the electric rotating rod rotates. The sliding ring drives the connecting rod to move synchronously, and the connecting rod drives the heating component to slide synchronously along the inner wall of the conveying pipe. When the heating component moves horizontally to the right, it drives the L-shaped rod to slide synchronously along the groove opened at the top of the conveying pipe. At this time, the right end of the top of the L-shaped rod will abut against the sliding block. The sliding block is restricted by the baffle, causing the hinge shaft between itself and the L-shaped rod to start rotating. At this time, the sliding block slides upward along the outer wall of the baffle with its own hinge shaft as the axis, and the baffle rotates synchronously with its own hinge shaft under the abutment of the L-shaped rod, driving the baffle to flip upward with the hinge shaft as the axis.

[0008] According to the above technical solution, the anti-mixing device includes an exhaust fan, a spiral hose, an air gun, and a sealing plate. The right side of the exhaust fan is fixedly installed on the outer wall of the left side of the conveying pipe. The left end of the spiral hose passes through and is fixedly installed on the right side of the exhaust fan. The left side of the air gun is fixedly installed on the right side of the spiral hose. The right side of the sealing plate is fixedly installed on the left side of the heating component.

[0009] According to the above technical solution, the sealing plate has several circular grooves equidistantly arranged inside. The several circular grooves and the connecting rod are staggered. The right side of the air gun fits into the left side of the circular groove of the sealing plate. When the heating component moves and resets, it drives the sealing plate to move synchronously. The sealing plate drives the air gun to move synchronously. The air gun pulls the spiral hose to extend and deform synchronously. At this time, the exhaust fan is started. The exhaust fan transmits the suction force to the air gun through the spiral hose. The air gun absorbs the dust raised when the raw material falls.

[0010] According to the above technical solution, the anti-mixing device further includes a U-shaped hollow plate, a circular roller, and a vibrating plate. The outer wall of the U-shaped hollow plate is penetrated and fixedly installed inside the sealing plate. A U-shaped groove is opened on the left side of the U-shaped hollow plate. Both ends of the circular roller are rotatably installed inside the U-shaped groove of the U-shaped hollow plate. The vibrating plate is fixedly installed on the inner wall of the conveying pipe at the end away from the U-shaped hollow plate. The vibrating plate is located on the left end of the U-shaped hollow plate's movement trajectory. When the sealing plate moves to the right, it drives the U-shaped hollow plate to move synchronously. The U-shaped hollow plate drives the circular roller to move synchronously. As the U-shaped hollow plate moves to the right, the circular roller contacts the bottom arc surface of the vibrating plate and generates a resisting force. As the U-shaped hollow plate continues to move, friction is generated between the circular roller and the bottom arc surface of the vibrating plate. At this time, the circular roller rotates on the inner wall of the U-shaped groove of the U-shaped hollow plate. At the same time, the U-shaped hollow plate pulls the vibrating plate and causes bending deformation. When the U-shaped hollow plate passes the vibrating plate, the vibrating plate will swing back and forth during its own toughness recovery process, thereby generating vibration.

[0011] According to the above technical solution, the anti-backflow device includes a round rod, a few turbulence plates, a fixed ring, several vertical plates, and a circular ring. The outer wall of the round rod is rotatably installed inside the right end of the U-shaped hollow plate. The several turbulence plates are all fixedly installed on the outer wall surface of the round rod. The outer wall of the fixed ring is fixedly installed on the inner wall of the conveying pipe. The several vertical plates are equidistant and fixedly installed on the side of the fixed ring away from the inner wall of the conveying pipe. The outer wall of the circular ring is rotatably installed inside the vertical plates.

[0012] According to the above technical solution, a spiral groove is provided on the outer wall of the right end of the round rod, and several of the spoilers are equidistantly distributed on the outer wall of the round rod. The fixing ring is located on the right side of the round rod, and the inside of the ring is located on the movement trajectory of the spiral groove at the right end of the round rod. When the U-shaped hollow plate moves to the right and resets, it drives the round rod to move synchronously. The round rod drives the spoilers to move synchronously. At the same time, the round rod will come into contact with the inside of the ring during its movement. At this time, the fixing ring and the vertical plate limit the ring to keep it stable and stationary. When the round rod enters the inside of the ring and moves horizontally, it is driven by the spiral groove to generate a rotational force and start to rotate along the inside of the right end of the U-shaped hollow plate. The round rod drives the spoilers to rotate.

[0013] According to the above technical solution, the anti-backflow device further includes several swing plates, elastic arc plates, and arc-shaped shells. The left sides of several swing plates are all hinged to the outer edge of the right side of the fixed ring by torsion springs. The left side of the swing plate is located on the movement trajectory of the right end of the round rod. The left side of the elastic arc plate is fixedly installed on the right side of the swing plate, and the right side of the arc-shaped shell is fixedly installed on the left side of the fixed ring. During the movement of the round rod to the right, it abuts against the swing plate to generate a resisting force. The swing plate causes its own hinge axis to start rotating through the resisting force. The swing plate flips to the right around the hinge axis. The swing plate drives the elastic arc plate to move synchronously. The elastic arc plate pushes the falling raw material block through its own arc surface. At the same time, the arc-shaped shell facilitates the entry of external airflow into the right end of the conveying pipe through its own arc surface.

[0014] A method for preparing neodymium iron boron powder includes the following steps: S1: After the grinding ball is placed into the preparation component through the sealing door, the sealing door is closed to make the preparation component form a sealed space. Then, the neodymium iron boron raw material is put into the conveying pipe through the feed port of the feeding component. S2: Before this, start the electric rotary rod. When the electric rotary rod rotates, it drives the spiral conveyor to rotate. When the feeding is completed, start the motor. When the motor output drives the preparation component to rotate, the grinding balls inside the preparation component rotate synchronously to grind the raw material into powder. S3: At the same time, when the electric rotating rod rotates, the reciprocating spiral groove on its outer wall restricts the sliding ring's built-in locking block, causing the sliding ring to slide to the right and reset along its outer wall when the electric rotating rod rotates. The sliding ring drives the connecting rod to move synchronously, and the connecting rod drives the heating component to slide synchronously along the inner wall of the conveying pipe. When the heating component moves horizontally to the right, it drives the L-shaped rod to slide synchronously along the groove opened at the top of the conveying pipe. S4: At this time, the top right end of the L-shaped rod will abut against the sliding block. The sliding block is restricted by the baffle, causing the hinge axis between itself and the L-shaped rod to start rotating. At this time, the sliding block slides upward along the outer wall of the baffle with its own hinge axis as the axis, and the baffle rotates synchronously with its own hinge axis under the abutment of the L-shaped rod, and drives the baffle to flip upward with the hinge axis as the axis.

[0015] This invention provides an apparatus and method for preparing neodymium iron boron powder. It has the following beneficial effects: (1) The present invention, through the setting of the anti-corrosion device, through the cooperation of the conveying pipe, the feeding component, the electric rotating rod, the spiral conveying plate, the sliding ring, the connecting rod, the heating component, the L-shaped rod, the baffle and the sliding block, causes the spiral conveying plate to drive the raw material into the preparation component during the rotation process, so as to maintain a continuous and uninterrupted feeding process, reduce the labor intensity of the workers and improve the preparation efficiency of NdFeB; at the same time, it effectively expands the activity range of the heating component, and relies on the heat energy emitted by the heating component to heat the inside of the conveying pipe, that is, to evaporate the moisture that corrodes the raw material in time, so as to avoid the NdFeB raw material being corroded by moisture during the preparation process and thus avoid the reduction of the magnetic properties and performance of NdFeB; at the same time, the continuous swing of the baffle changes the spacing of the feed port, thereby realizing indirect feeding and preventing the feed from being too fast and thus reducing the grinding fineness.

[0016] (2) The present invention, through the setting of the anti-mixing device, through the cooperation of heating components, exhaust fan, spiral hose, air gun, sealing plate, U-shaped hollow plate, round roller and vibrating plate, relies on the shielding of the sealing plate to reduce heat leakage, that is, effectively increase the heating rate inside the conveying pipe within the same time period. At the same time, the exhaust fan draws the powder on the surface of the raw material away from the inside of the conveying pipe, preventing the powder from mixing with the raw material and sending it into the preparation component at the same time, avoiding the powder from mixing with the NdFeB powder finished product, thereby reducing its own advantages such as high coercivity and high magnetism. At the same time, the vibration force accelerates the airflow rate inside the conveying pipe, that is, accelerates the drying speed of heat on moisture, ensuring the overall dryness inside the conveying pipe, and preventing the dust raised when the raw material falls from adhering to the inner wall of the conveying pipe due to moisture, reducing the extraction effect of the exhaust fan on the powder, and causing an increase in the mixture in the raw material powder.

[0017] (3) The present invention, through the setting of the anti-backflow device, through the cooperation of U-shaped hollow plate, round rod, baffle plate, fixed ring, vertical plate, circular ring, swing plate, elastic arc plate and arc shell, continuously changes the disturbance range of the baffle plate during the rotation of the baffle plate, improves the uniformity of the baffle plate's disturbance to the powder, that is, avoids the uneven distribution of the powder drawn by the exhaust fan during the movement, avoids the blockage of some air guns due to excessive powder adhesion, and prevents the powder from accumulating inside the conveying pipe due to reduced extraction effect; and relies on the swing plate and elastic arc plate to push the raw material block with positioning deviation, which facilitates the spiral conveyor plate to push and convey, and prevents the raw material block from accumulating inside the conveying pipe. At the same time, the arc surface of the arc shell effectively blocks the backflow of gas and powder, and prevents the powder from getting stuck in the gaps of the surrounding parts and causing corrosion. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the entire invention; Figure 2 This is a schematic diagram of the overall internal structure of the present invention; Figure 3This is a schematic diagram of the anti-corrosion device of the present invention; Figure 4 This is a schematic cross-sectional view of the anti-corrosion device of the present invention; Figure 5 This is a schematic diagram of the anti-mixing device of the present invention; Figure 6 This is a schematic diagram of the anti-mixing device of the present invention from the left side. Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at point A in the middle; Figure 8 This is a schematic diagram of the anti-backflow device of the present invention; Figure 9 This is a schematic diagram of the anti-backflow device of the present invention from the left side.

[0019] In the diagram: 1. Base; 2. Fixing plate; 21. Motor; 3. Support plate; 31. Friction roller; 32. Preparation component; 33. Sealing door; 4. Anti-corrosion device; 41. Conveying pipe; 42. Feeding component; 43. Electric rotating rod; 44. Spiral conveyor plate; 45. Sliding ring; 46. Connecting rod; 47. Heating component; 48. L-shaped rod; 49. Baffle; 410. Sliding block; 5. Anti-mixing device; 51. Exhaust fan; 52. Spiral hose; 53. Air gun; 54. Sealing plate; 55. U-shaped hollow plate; 56. Circular roller; 57. Vibrating plate; 6. Anti-backflow device; 61. Circular rod; 62. Baffle plate; 63. Fixing ring; 64. Vertical plate; 65. Circular ring; 66. Swinging plate; 67. Elastic arc plate; 68. Arc shell. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] Please see Figures 1-9 One embodiment of the present invention is: a neodymium iron boron powder preparation device, including a base 1, a fixing plate 2 is provided on the top right side of the base 1, a motor 21 is provided on the left side of the fixing plate 2, and the motor 21 has a variable speed function. Two arc-shaped support plates 3 are symmetrically arranged on the top of the base 1. Arc grooves are opened inside the two arc-shaped support plates 3. A plurality of friction rollers 31 are arranged inside the arc grooves of the arc-shaped support plates 3. A preparation component 32 is arranged inside the arc-shaped support plates 3. The right side of the preparation component 32 is fixedly connected to the left side of the output end of the motor 21. A sealing door 33 is provided on the top of the preparation component 32. An anti-corrosion device 4 is provided on the left side of the preparation component 32, an anti-mixing device 5 is provided inside the anti-corrosion device 4, and an anti-backflow device 6 is provided on the right side of the anti-mixing device 5. The anti-corrosion device 4 includes a conveying pipe 41. The right side of the conveying pipe 41 is rotatably installed on the left side of the preparation component 32. The right side of the conveying pipe 41 is connected to the left side of the preparation component 32. The feeding component 42 is fixedly installed on the top left side of the base 1, and the feeding component 42 has a feeding port inside. An electric rotating rod 43 is rotatably installed on the left side of the inner wall of the conveying pipe 41. A reciprocating spiral groove is opened on the outer wall of the left end of the electric rotating rod 43. A spiral conveying plate 44 is fixedly installed on the outer wall of the right end of the electric rotating rod 43. A sliding ring 45 is movably installed through the outer wall of the reciprocating spiral groove of the electric rotating rod 43. Several connecting rods 46 are fixedly installed at equal intervals on the outer wall of the sliding ring 45. A heating component 47 is fixedly installed on the end of the connecting rod 46 away from the sliding ring 45. An L-shaped rod 48 is fixedly installed through the top of the heating component 47. A baffle 49 is hinged to the left side of the inner wall of the feeding port of the feeding component 42 by a torsion spring. A sliding block 410 is slidably installed on the side of the baffle 49 near the L-shaped rod 48.

[0022] The outer wall of the conveying pipe 41 is fixedly installed inside the feeding assembly 42, and the outer wall of the heating assembly 47 is slidably installed on the inner wall of the conveying pipe 41. The top right end of the L-shaped rod 48 moves through the inside of the feeding assembly 42, and the left side of the outer wall of the sliding block 410 is hinged to the top right end of the L-shaped rod 48. Through the above cooperation, the spiral conveying plate 44 rotates and drives the raw material into the preparation assembly 32, maintaining a continuous and uninterrupted feeding process. This reduces the labor intensity of the workers while improving the preparation efficiency of NdFeB. Through the above cooperation, the range of motion of the heating assembly 47 is effectively expanded. The heat energy emitted by the heating assembly 47 heats the inside of the conveying pipe 41, which evaporates the moisture that corrodes the raw material in time, preventing the NdFeB raw material from being corroded by moisture during the preparation process and thus avoiding the reduction of the magnetic properties and performance of NdFeB. At the same time, the continuous swing of the baffle 49 changes the spacing of the feed inlet, thereby realizing indirect feeding and preventing the grinding fineness from being reduced due to excessive feeding.

[0023] In use, the grinding balls are placed into the preparation assembly 32 through the sealing door 33, and then the sealing door 33 is closed to create a sealed space in the preparation assembly 32. The NdFeB raw material is then fed into the conveying pipe 41 through the feed inlet of the feeding assembly 42. Before this, the electric rotary rod 43 is started, and its rotation drives the spiral conveyor 44 to rotate. After feeding is complete, the motor 21 is started, and its output drives the preparation assembly 32 to rotate. Simultaneously, the grinding balls inside the preparation assembly 32 rotate synchronously, grinding the raw material into powder. This combination ensures that the spiral conveyor 44, while rotating, carries the raw material into the preparation assembly 32, maintaining a continuous and uninterrupted feeding process. This reduces the labor intensity of workers while improving the efficiency of NdFeB preparation. Simultaneously, the electric rotary rod 43, through its reciprocating spiral grooves on its outer wall, restricts the internal locking block of the sliding ring 45, allowing the sliding ring 45 to slide to the right and reset along its outer wall as the electric rotary rod 43 rotates. The sliding ring 45 drives the connecting rod 46 to move synchronously, and the connecting rod 46 drives the heating element... Component 47 slides synchronously along the inner wall of the conveying pipe 41. When the heating component 47 moves horizontally to the right, it drives the L-shaped rod 48 to slide synchronously along the groove provided at the top of the conveying pipe 41. At this time, the right end of the top of the L-shaped rod 48 will abut against the sliding block 410. The sliding block 410 is restricted by the baffle 49, causing the hinge axis between itself and the L-shaped rod 48 to start rotating. At this time, the sliding block 410 slides upward along the outer wall of the baffle 49 with its own hinge axis as the axis, and the baffle 49 rotates synchronously with its own hinge axis under the abutment of the L-shaped rod 48, and drives... The movable baffle 49 rotates upward around the hinge axis, effectively expanding the range of motion of the heating component 47 through the above-mentioned cooperation. The heat energy emitted by the heating component 47 heats the inside of the conveying pipe 41, thus evaporating the moisture that corrodes the raw material in time, preventing the NdFeB raw material from being corroded by moisture during the preparation process, and avoiding the reduction of the magnetic properties and performance of NdFeB. At the same time, the continuous swing of the baffle 49 changes the spacing of the feed inlet, thereby achieving indirect feeding and preventing the grinding fineness from being reduced due to excessive feeding.

[0024] Please see Figures 1-9 Based on the above embodiments, another embodiment of the present invention further includes an anti-mixing device 5; The anti-mixing device 5 includes an exhaust fan 51, a spiral hose 52, an air gun 53, and a sealing plate 54. The right side of the exhaust fan 51 is fixedly installed on the outer wall of the left side of the delivery pipe 41. The left end of the spiral hose 52 passes through and is fixedly installed on the right side of the exhaust fan 51. The left side of the air gun 53 is fixedly installed on the right side of the spiral hose 52. The right side of the sealing plate 54 is fixedly installed on the left side of the heating assembly 47.

[0025] According to the above technical solution, the sealing plate 54 has several circular grooves equidistantly arranged inside. The circular grooves and the connecting rod 46 are staggered. The right side of the air gun 53 fits with the left side of the circular groove of the sealing plate 54. Through the above cooperation, the heat leakage is reduced by the shielding of the sealing plate 54. That is, the heating rate inside the conveying pipe 41 is effectively increased within the same time period. At the same time, the exhaust fan 51 draws the powder on the surface of the raw material away from the inside of the conveying pipe 41 to prevent the powder from mixing with the raw material and sends it into the preparation component 32 at the same time. This avoids the powder from mixing with the NdFeB powder finished product, thereby reducing its advantages such as high coercivity and high magnetism.

[0026] The anti-mixing device 5 also includes a U-shaped hollow plate 55, a round roller 56, and a vibrating plate 57. The outer wall of the U-shaped hollow plate 55 is penetrated and fixedly installed inside the sealing plate 54. A U-shaped groove is opened on the left side of the U-shaped hollow plate 55. Both ends of the round roller 56 are rotatably installed inside the U-shaped groove of the U-shaped hollow plate 55. The vibrating plate 57 is fixedly installed on the inner wall of the conveying pipe 41 at the end away from the U-shaped hollow plate 55. The vibrating plate 57 is located on the movement trajectory of the left end of the U-shaped hollow plate 55. Through the above cooperation, the airflow rate inside the conveying pipe 41 is accelerated by vibration, that is, the drying speed of heat on moisture is accelerated, ensuring the overall dryness inside the conveying pipe 41, and preventing the dust raised when the raw material falls from adhering to the inner wall of the conveying pipe 41 due to moisture, reducing the extraction effect of the exhaust fan 51 on the powder, and causing an increase in the mixture in the raw material powder.

[0027] During use, when the heating component 47 moves and resets, it drives the sealing plate 54 to move synchronously. The sealing plate 54 drives the air gun 53 to move synchronously. The air gun 53 pulls the spiral hose 52 to extend and deform synchronously. At this time, the exhaust fan 51 is activated. The exhaust fan 51 transmits suction force to the air gun 53 through the spiral hose 52. The air gun 53 absorbs the dust raised when the raw material falls. Through the above cooperation, the heat loss is reduced by the shielding of the sealing plate 54, which effectively increases the heating rate inside the conveying pipe 41 within the same time. At the same time, the exhaust fan 51 draws the powder from the surface of the raw material away from the inside of the conveying pipe 41 to prevent the powder from mixing with the raw material and sends it into the preparation component 32 simultaneously. This avoids the powder from mixing with the NdFeB powder product, thereby reducing its high coercivity and high magnetic properties. When the sealing plate 54 moves to the right, it drives the U-shaped hollow plate 55 to move synchronously. The U-shaped hollow plate 55 drives the circular roller 56. In synchronous motion, the roller 56, as it moves to the right along with the U-shaped hollow plate 55, comes into contact with the bottom arc surface of the vibrating plate 57, generating a resistance force. As the U-shaped hollow plate 55 continues to move, friction is generated between the roller 56 and the bottom arc surface of the vibrating plate 57. At this time, the roller 56 rotates on the inner wall of the U-shaped groove of the U-shaped hollow plate 55. Simultaneously, the U-shaped hollow plate 55 pulls the vibrating plate 57, causing it to bend and deform. After the U-shaped hollow plate 55 passes the vibrating plate 57, the vibrating plate 57 will swing back and forth during its own toughness recovery process, thereby generating vibration. Through the above coordination, the vibration force accelerates the airflow rate inside the conveying pipe 41, that is, accelerates the drying speed of the heat on the moisture, ensures the overall dryness inside the conveying pipe 41, and prevents the dust raised when the raw material falls from adhering to the inner wall of the conveying pipe 41 due to moisture, thus reducing the extraction effect of the exhaust fan 51 on the powder and causing an increase in the mixture in the raw material powder.

[0028] Please see Figures 1-9 Based on the above embodiments, another embodiment of the present invention further includes an anti-backflow device 6; The anti-backflow device 6 includes a round rod 61, a flow interference plate 62, a fixing ring 63, several vertical plates 64, and a circular ring 65. The outer wall of the round rod 61 is penetrated and rotatably installed inside the right end of the U-shaped hollow plate 55. The flow interference plates 62 are all fixedly installed on the outer wall surface of the round rod 61. The outer wall of the fixing ring 63 is fixedly installed on the inner wall of the conveying pipe 41. The several vertical plates 64 are equidistant and fixedly installed on the side of the fixing ring 63 away from the inner wall of the conveying pipe 41. The outer wall of the circular ring 65 is penetrated and fixedly installed inside the vertical plate 64.

[0029] A spiral groove is provided on the outer wall of the right end of the round rod 61. If the turbulence plates 62 are evenly distributed on the outer wall of the round rod 61, the fixing ring 63 is located on the right side of the round rod 61, and the inner part of the ring 65 is located on the movement trajectory of the spiral groove at the right end of the round rod 61, the turbulence range of the turbulence plates 62 is continuously changed during the rotation of the turbulence plates 62, thereby improving the uniformity of the turbulence of the powder by the turbulence plates 62. This avoids the uneven distribution of the powder drawn by the exhaust fan 51 during the movement, avoids the blockage of some air guns 53 due to excessive powder adhesion, and prevents the powder from accumulating inside the conveying pipe 41 due to the reduced extraction effect.

[0030] The anti-backflow device 6 also includes several swing plates 66, elastic arc plates 67, and arc shells 68. The left sides of the swing plates 66 are all hinged to the outer edge of the right side of the fixed ring 63 by torsion springs. The left side of the swing plates 66 is located on the movement trajectory of the right end of the round rod 61. The left side of the elastic arc plates 67 is fixedly installed on the right side of the swing plates 66, and the right side of the arc shells 68 is fixedly installed on the left side of the fixed ring 63. Through the above cooperation, the swing plates 66 and elastic arc plates 67 push the raw material block with positioning deviation, which facilitates the conveying of the spiral conveyor plate 44 and prevents the raw material block from being trapped inside the conveying pipe 41. At the same time, the arc surface of the arc shells 68 effectively blocks the backflow of gas and powder, preventing the powder from getting stuck in the gaps of the surrounding parts and causing corrosion.

[0031] In use, when the U-shaped hollow plate 55 moves to the right and resets, it drives the round rod 61 to move synchronously. The round rod 61 drives the baffle 62 to move synchronously. During the movement of the round rod 61, it will contact the inside of the ring 65. At this time, the fixed ring 63 and the vertical plate 64 limit the ring 65 to keep it stable and stationary. When the round rod 61 enters the inside of the ring 65 and moves horizontally, it generates a rotational force through the spiral groove and begins to rotate along the inside of the right end of the U-shaped hollow plate 55. The round rod 61 drives the baffle 62 to rotate. Through the above coordination, the agitation range of the baffle 62 is continuously changed during the rotation of the baffle 62, improving the uniformity of the agitation of the powder by the baffle 62. That is, it avoids the uneven distribution of the powder drawn by the fan 51 during the movement, and avoids the blockage of some air guns 53 due to excessive powder adhesion, preventing powder from being blocked. Due to the reduced extraction effect, the material accumulates inside the conveying pipe 41. During the movement of the round rod 61 to the right, it abuts against the swing plate 66, generating a resisting force. The swing plate 66, through this resisting force, causes its hinge shaft to start rotating. The swing plate 66 rotates to the right around the hinge shaft, and the swing plate 66 drives the elastic arc plate 67 to move synchronously. The elastic arc plate 67 pushes the falling material block through its own arc surface. At the same time, the arc shell 68 facilitates the entry of external airflow into the right end of the conveying pipe 41 through its own arc surface. Through the above cooperation, the swing plate 66 and the elastic arc plate 67 push the material block with positioning deviation, which facilitates the conveying of the spiral conveyor plate 44 and prevents the material block from accumulating inside the conveying pipe 41. At the same time, the arc surface of the arc shell 68 effectively blocks the backflow of gas and powder, preventing the powder from getting stuck in the gaps of surrounding components and causing corrosion.

[0032] A method for preparing neodymium iron boron powder includes the following steps: S1: After the grinding ball is placed into the preparation component 32 through the sealing door 33, the sealing door 33 is closed to make the preparation component 32 form a sealed space. Then, the neodymium iron boron raw material is put into the conveying pipe 41 through the feed port of the feeding component 42. S2: Before this, start the electric rotary rod 43. When the electric rotary rod 43 rotates, it drives the spiral conveyor plate 44 to rotate. When the feeding is completed, start the motor 21. When the output end of the motor 21 drives the preparation component 32 to rotate, the grinding balls inside the preparation component 32 rotate synchronously to grind the raw material into powder. S3: At the same time, when the electric rotating rod 43 rotates, the reciprocating spiral groove on its outer wall restricts the built-in block of the sliding ring 45, causing the sliding ring 45 to slide to the right and reset along its outer wall when the electric rotating rod 43 rotates. The sliding ring 45 drives the connecting rod 46 to move synchronously, and the connecting rod 46 drives the heating component 47 to slide synchronously along the inner wall of the conveying pipe 41. When the heating component 47 moves horizontally to the right, it drives the L-shaped rod 48 to slide synchronously along the groove opened at the top of the conveying pipe 41. S4: At this time, the top right end of the L-shaped rod 48 will abut against the sliding block 410. The sliding block 410 is restricted by the baffle 49, causing the hinge axis between itself and the L-shaped rod 48 to start rotating. At this time, the sliding block 410 slides upward along the outer wall of the baffle 49 with its own hinge axis as the axis, and the baffle 49 rotates synchronously with its own hinge axis under the abutment of the L-shaped rod 48, and drives the baffle 49 to flip upward with the hinge axis as the axis.

[0033] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A neodymium iron boron powder preparation apparatus, comprising a base (1), characterized in that: A fixing plate (2) is provided on the top right side of the base (1), and a motor (21) is provided on the left side of the fixing plate (2). The motor (21) has a variable speed function. Two arc-shaped support plates (3) are symmetrically arranged on the top of the base (1). Arc grooves are opened inside the two arc-shaped support plates (3). Several friction rollers (31) are arranged inside the arc grooves of the arc-shaped support plates (3). A preparation component (32) is arranged inside the arc-shaped support plates (3). The right side of the preparation component (32) is fixedly connected to the left side of the output end of the motor (21). A sealing door (33) is provided on the top of the preparation component (32). The preparation component (32) is provided with an anti-corrosion device (4) on the left side, and an anti-mixing device (5) is provided inside the anti-corrosion device (4). An anti-backflow device (6) is provided on the right side of the anti-mixing device (5). The anti-corrosion device (4) includes a conveying pipe (41), the right side of which is rotatably mounted on the left side of the preparation component (32). The right side of the conveying pipe (41) is connected to the left side of the preparation component (32). A feeding component (42) is fixedly mounted on the top left side of the base (1), and a feeding port is provided inside the feeding component (42). An electric rotating rod (43) is rotatably mounted on the left side of the inner wall of the conveying pipe (41). A reciprocating spiral groove is provided on the outer wall of the left end of the electric rotating rod (43). A spiral conveying plate is fixedly mounted on the outer wall of the right end of the electric rotating rod (43). 44), the electric rotary rod (43) has a sliding ring (45) installed through the outer wall of the reciprocating spiral groove. Several connecting rods (46) are fixedly installed at equal intervals on the outer wall of the sliding ring (45). A heating component (47) is fixedly installed at the end of the connecting rod (46) away from the sliding ring (45). An L-shaped rod (48) is installed through the top of the heating component (47). A baffle (49) is hinged to the left side of the feed port of the feeding component (42) by a torsion spring. A sliding block (410) is slidably installed on the side of the baffle (49) near the L-shaped rod (48). The anti-mixing device (5) includes a blower (51), a spiral hose (52), an air gun (53), and a sealing plate (54). The blower (51) is fixedly installed on the right side of the outer wall of the left side of the conveying pipe (41). The left end of the spiral hose (52) passes through and is fixedly installed on the right side of the blower (51). The left side of the air gun (53) is fixedly installed on the right side of the spiral hose (52). The right side of the sealing plate (54) is fixedly installed on the left side of the heating assembly (47). The anti-mixing device (5) also includes a U-shaped hollow plate (55), a round roller (56) and a vibrating plate (57). The outer wall of the U-shaped hollow plate (55) is penetrated and fixedly installed inside the sealing plate (54). A U-shaped groove is opened on the left side of the U-shaped hollow plate (55). Both ends of the round roller (56) are rotatably installed inside the U-shaped groove of the U-shaped hollow plate (55). The vibrating plate (57) is fixedly installed on the inner wall of the conveying pipe (41) at one end away from the U-shaped hollow plate (55). The vibrating plate (57) is located on the movement trajectory of the left end of the U-shaped hollow plate (55). The anti-backflow device (6) includes a round rod (61), a few turbulence plates (62), a fixed ring (63), several vertical plates (64) and a circular ring (65). The outer wall of the round rod (61) is through and rotatably installed inside the right end of the U-shaped hollow plate (55). Several turbulence plates (62) are fixedly installed on the outer wall surface of the round rod (61). The outer wall of the fixed ring (63) is fixedly installed on the inner wall of the conveying pipe (41). Several vertical plates (64) are equidistant and fixedly installed on the side of the fixed ring (63) away from the inner wall of the conveying pipe (41). The outer wall of the circular ring (65) is through and fixedly installed inside the vertical plate (64).

2. The neodymium iron boron powder preparation apparatus according to claim 1, characterized in that: The outer wall of the conveying pipe (41) is fixedly installed inside the feeding assembly (42), the outer wall of the heating assembly (47) is slidably installed on the inner wall of the conveying pipe (41), the top right end of the L-shaped rod (48) moves through the inside of the feeding assembly (42), and the left side of the outer wall of the sliding block (410) is hinged to the top right end of the L-shaped rod (48).

3. The neodymium iron boron powder preparation apparatus according to claim 2, characterized in that: The sealing plate (54) has several circular grooves equidistantly arranged inside. The circular grooves and the connecting rod (46) are staggered. The right side of the air gun (53) fits into the left side of the circular groove of the sealing plate (54).

4. The neodymium iron boron powder preparation apparatus according to claim 3, characterized in that: The outer wall of the right end of the round rod (61) is provided with a spiral groove, and several of the baffles (62) are equidistantly distributed on the outer wall of the round rod (61). The fixing ring (63) is located on the right side of the round rod (61), and the inside of the ring (65) is located on the movement trajectory of the spiral groove at the right end of the round rod (61).

5. The neodymium iron boron powder preparation apparatus according to claim 4, characterized in that: The anti-backflow device (6) also includes several swing plates (66), elastic arc plates (67) and arc shells (68). The left side of several swing plates (66) is hinged to the outer edge of the right side of the fixed ring (63) by torsion springs. The left side of the swing plates (66) is located on the movement trajectory of the right end of the round rod (61). The left side of the elastic arc plates (67) is fixedly installed on the right side of the swing plates (66), and the right side of the arc shells (68) is fixedly installed on the left side of the fixed ring (63).

6. A method for preparing neodymium iron boron powder, using the neodymium iron boron powder preparation apparatus according to claim 5, characterized in that, Includes the following steps: S1: After the grinding ball is placed into the preparation component (32) through the sealing door (33), the sealing door (33) is closed to make the preparation component (32) form a sealed space. Then, the neodymium iron boron raw material is placed into the conveying pipe (41) through the feed port of the feeding component (42). S2: Before this, start the electric rotary rod (43). When the electric rotary rod (43) rotates, it drives the spiral conveyor plate (44) to rotate. When the feeding is completed, start the motor (21). When the output end of the motor (21) drives the preparation component (32) to rotate, the grinding balls inside the preparation component (32) rotate synchronously to grind the raw material into powder. S3: At the same time, when the electric rotating rod (43) rotates, the reciprocating spiral groove on its outer wall restricts the built-in block of the sliding ring (45), causing the sliding ring (45) to slide to the right and reset along its outer wall when the electric rotating rod (43) rotates. The sliding ring (45) drives the connecting rod (46) to move synchronously. The connecting rod (46) drives the heating component (47) to slide synchronously along the inner wall of the conveying pipe (41). When the heating component (47) moves horizontally to the right, it drives the L-shaped rod (48) to slide synchronously along the groove opened at the top of the conveying pipe (41). S4: At this time, the top right end of the L-shaped rod (48) will abut against the sliding block (410). The sliding block (410) is restricted by the baffle (49) and causes the hinge axis between itself and the L-shaped rod (48) to start rotating. At this time, the sliding block (410) slides upward along the outer wall of the baffle (49) with its own hinge axis as the axis. The baffle (49) rotates synchronously with its own hinge axis under the abutment of the L-shaped rod (48), and drives the baffle (49) to flip upward with the hinge axis as the axis.

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