Neodymium iron boron powder preparation device and preparation method

Abstract

The invention discloses a neodymium iron boron powder preparation device and method, and relates to the technical field of neodymium iron boron powder preparation. The device comprises a base, a fixing plate is arranged on the right side of the top of the base, a motor is arranged on the left side of the fixing plate, the motor has a variable speed function, two arc-surface supporting plates are symmetrically arranged on the top of the base, arc grooves are formed in the two arc-surface supporting plates, and a plurality of friction rollers are arranged in the arc grooves of the arc-surface supporting plates; the right side of the preparation assembly is fixedly connected to the left side of the output end of the motor, and a sealing door is arranged at the top of the preparation assembly. The movement range of the heating assembly is effectively expanded, the temperature of the interior of the conveying pipe is increased by means of heat energy emitted by the heating assembly, that is, eroded moisture of the raw materials is evaporated in time, the phenomenon that the neodymium iron boron raw materials are eroded by the moisture in the preparation process and accordingly are corroded is avoided, and the magnetism and use performance of neodymium iron boron are prevented from being reduced.

Description

Technical Field

[0001] The invention relates to the technical field of NdFeB powder preparation, in particular to a NdFeB powder preparation device and a preparation method. Background Art

[0002] As a kind of rare earth permanent magnet material, NdFeB has extremely high magnetic energy product and coercive force. At the same time, the advantage of high energy density makes NdFeB permanent magnet material widely used in modern industry and electronic technology. At the same time, NdFeB needs to be prepared into powder during the production process, so the processing technology is constantly optimized with the development of science and technology.

[0003] The patent with the patent announcement number CN114918010B discloses a NdFeB powder preparation device, which provides a NdFeB powder preparation device that can drive NdFeB to rotate and transfer materials by rotating the loading barrel, and the grinding balls can perform rotary grinding on the NdFeB. A NdFeB powder preparation device includes a chassis, a panel, an arc-shaped connecting plate, a workbench, a swing mechanism and a feeding mechanism; the left and right sides of the chassis are connected to the panel, the top of the chassis is connected to the workbench, the front and rear sides of the lower part of the panel and the chassis are connected to the arc-shaped connecting plate, the workbench is provided with a swing mechanism for grinding NdFeB, and the swing mechanism is provided with a feeding mechanism for feeding. The loading barrel between the upper parts of the two round head plates of the patent can make the NdFeB continuously rotate and transport materials, and can also make the grinding balls perform rotary grinding on the NdFeB, thereby improving the preparation efficiency of the patent.

[0004] However, the device still has some shortcomings: the device can improve the preparation efficiency through rotary grinding, but when the damp NdFeB raw material block is cold-started and ground, the high-speed rotation causes the NdFeB to gradually grind from block to powder. During the preparation process, the NdFeB powder is easily corroded by moisture and thus corroded, and the magnetic properties and performance of the NdFeB are easily reduced. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a device and method for preparing NdFeB powder, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a NdFeB powder preparation device, comprising a base, a fixed plate is arranged on the right side of the top of the base, a motor is arranged on the left side of the fixed plate, and the motor has a variable speed function, two arc support plates are symmetrically arranged on the top of the base, arc grooves are opened inside the two arc support plates, a plurality of friction rollers are arranged inside the arc grooves of the arc support plates, a preparation component is arranged inside the arc support plate, the right side of the preparation component is fixedly connected to the left side of the motor output end, and a sealing door is arranged 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-erosion device includes a conveying pipe, the right side of the conveying pipe is rotatably installed on the left side of the preparation component, the right side of the conveying pipe is connected with the left side of the preparation component, a feeding component is fixedly installed on the left side of the top of the base, and a feeding port is opened inside the feeding component, an electric rotating rod is rotatably installed on the left side of the inner wall of the conveying pipe, a reciprocating spiral groove is opened on the outer wall of the left end of the electric rotating rod, a spiral conveying sheet is fixedly installed on the outer wall of the right end of the electric rotating rod, a sliding ring is penetrated and movably installed on the outer wall of the reciprocating spiral groove of the electric rotating rod, a plurality of connecting rods are equidistantly and fixedly installed on the outer wall of the sliding ring, a heating component is fixedly installed on the end of the connecting rod away from the sliding ring, an L-shaped rod is penetrated and fixedly installed on the top of the heating component, a baffle is hinged on the left side of the inner wall of the feed port of the feeding component through a torsion spring, and a sliding block is slidably installed on the baffle close to the side of the L-shaped rod.

[0007] According to the above technical scheme, the outer wall of the conveying pipe is fixedly installed inside the feeding component, the outer wall of the heating component is slidably installed on the inner wall of the conveying pipe, the right end of the top of the L-shaped rod movably passes through the inside of the feeding component, and the left side of the outer wall of the sliding block is hinged at the right end of the top of the L-shaped rod. After the grinding balls are placed into the preparation component through the sealing door, the sealing door is closed to form a sealed space for the preparation component, and then the NdFeB raw material is placed into the conveying pipe through the feeding port of the feeding component. Prior to this, the electric rotating rod is started, and the electric rotating rod rotates to drive the spiral conveying sheet to rotate. When the feeding is completed, the motor is started, and when the output end of the motor drives the preparation component to rotate, the grinding balls inside the preparation component rotate synchronously to grind the raw material into powder; at the same time, the electric When the movable rotating rod rotates, the reciprocating spiral groove on its outer wall limits the built-in block of the sliding ring, so that the sliding ring can slide to the right along its outer wall and reset when the electric rotating rod rotates, and 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 sliding groove provided at the top of the conveying pipe. At this time, the right end of the top of the L-shaped rod will resist the sliding block, and 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's own hinge axis rotates synchronously under the resistance of the L-shaped rod, and drives the baffle to flip upward with the hinge axis 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 left outer wall 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, and the right side of the sealing plate is fixedly installed on the left side of the heating assembly.

[0009] According to the above technical solution, a number of circular grooves are equidistantly provided inside the sealing plate, and the circular grooves and connecting rods are staggered. The right side of the air gun fits with 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, and 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, and 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 materials fall.

[0010] The U-shaped hollow plate is provided with a U-shaped groove on the left side of the U-shaped hollow plate, and both ends of the round roller are rotatably installed in 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 one end away from the U-shaped hollow plate. The vibrating plate is located on the movement trajectory of the left end of the U-shaped hollow plate. When the sealing plate moves to the right, the U-shaped hollow plate is driven to move synchronously, and the U-shaped hollow plate drives the round roller to move synchronously. As the U-shaped hollow plate moves to the right, the round roller contacts the bottom arc surface of the vibrating plate to generate a resistance force. As the U-shaped hollow plate continues to move, a friction force is generated between the round roller and the bottom arc surface of the vibrating plate. At this time, the round roller rotates on the inner wall of the U-shaped groove of the U-shaped hollow plate, and the U-shaped hollow plate pulls the vibrating plate to bend and deform. When the U-shaped hollow plate passes through the vibrating plate, the vibrating plate will swing back and forth through the process of recovering its own toughness to generate vibration.

[0011] According to the above technical solution, the backflow prevention device includes a round rod, a spoiler, a fixed ring, a plurality of vertical plates and a circular ring. The outer wall of the round rod passes through and is rotatably installed inside the right end of the U-shaped hollow plate. Several of the spoilers are 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. Several of the 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 passes through and is fixedly installed inside the vertical plate.

[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 a plurality of spoilers are equidistantly distributed on the outer wall of the round rod. The fixed ring is located on the right side of the round rod, and the interior 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, and the round rod drives the spoiler to move synchronously. At the same time, the round rod will contact the inside of the ring during the movement of the round rod. At this time, the fixed 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 displaces horizontally, the spiral groove drives the round rod to generate a rotational force and begins to rotate along the inside of the right end of the U-shaped hollow plate, and the round rod drives the spoiler to rotate.

[0013] According to the above technical scheme, the backflow prevention device also includes a plurality of swinging plates, elastic arc sheets and arc shells. The left sides of the plurality of swinging plates are hinged at the edge of the outer wall on the right side of the fixed ring through a torsion spring. The left side of the swinging plate is located on the movement trajectory of the right end of the round rod. The left side of the elastic arc sheet is fixedly installed on the right side of the swinging plate. The right side of the arc shell is fixedly installed on the left side of the fixed ring. During the movement of the round rod to the right, it contacts the swinging plate to generate a resistance force. The swinging plate causes its own hinge axis to start rotating through the resistance force. The swinging plate flips to the right with the hinge axis as the axis. The swinging plate drives the elastic arc sheet to move synchronously. The elastic arc sheet pushes the falling raw material block through its own arc surface. At the same time, the arc shell facilitates the external airflow to enter the right end of the conveying pipe through its own arc surface.

[0014] A method for preparing NdFeB powder comprises the following steps: S1: After the grinding balls are placed into the preparation component through the sealing door, the sealing door is closed to form a sealed space for the preparation component, and then the NdFeB raw material is placed into the conveying pipe through the feeding port of the feeding component; S2: Before this, the electric rotating rod is started, and the electric rotating rod rotates to drive the spiral conveyor to rotate. When the feeding is completed, the motor is started, and the output end of the motor drives the preparation component to rotate. The grinding balls inside the preparation component rotate synchronously to grind the raw materials into powder; S3: When the electric rotating rod rotates, the reciprocating spiral groove on its outer wall restricts the built-in block of the sliding ring, so that the sliding ring can slide to the right along its outer wall and reset 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 sliding groove opened on the top of the conveying pipe; S4: At this time, the right end of the top of the L-shaped rod will resist 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's own hinge axis rotates synchronously under the resistance of the L-shaped rod, and drives the baffle to flip upward with the hinge axis as the axis.

[0015] The present invention provides a device and method for preparing NdFeB powder, which has the following beneficial effects: (1) The present invention adopts the arrangement of an anti-corrosion device, and cooperates with a conveying pipe, a feeding assembly, an electric rotating rod, a spiral conveying sheet, a sliding ring, a connecting rod, a heating assembly, an L-shaped rod, a baffle plate and a sliding block to drive the raw materials to be conveyed into the preparation assembly during the rotation of the spiral conveying sheet, thereby maintaining a continuous and uninterrupted feeding process, reducing the labor intensity of the staff and improving the preparation efficiency of NdFeB; at the same time, the activity range of the heating assembly is effectively expanded, and the heat energy emitted by the heating assembly is used to heat the inside of the conveying pipe, that is, the moisture corroded by the raw materials is evaporated in time, thereby preventing the NdFeB raw materials from being corroded by moisture during the preparation process and thus corrosion, thereby preventing the magnetic properties and performance of the NdFeB from being reduced; at the same time, the baffle plate is constantly swung to change the spacing of the feed port, thereby realizing indirect feeding and preventing excessive feeding from reducing the grinding fineness.

[0016] (2) The present invention adopts the setting of the anti-mixing device, and cooperates with the heating component, the exhaust fan, the spiral hose, the air gun, the sealing plate, the U-shaped hollow plate, the round roller and the vibration plate. The heat spillage is reduced by the shielding of the sealing plate, that is, the heating rate inside the conveying pipe is effectively increased within the same time. At the same time, the exhaust fan extracts the powder on the surface of the raw material from the inside of the conveying pipe to prevent the powder from mixing with the raw material and simultaneously feeds it into the preparation component, thereby preventing the powder from mixing with the finished NdFeB powder and thus reducing its own advantages such as high coercive force and high magnetic properties. At the same time, the vibration force is used to accelerate the flow rate of the airflow inside the conveying pipe, that is, to accelerate the drying rate of moisture by heat, thereby ensuring the overall dryness inside the conveying pipe, thereby preventing the dust raised when the raw material falls from adhering to the inner wall of the conveying pipe due to moisture, thereby reducing the extraction effect of the exhaust fan on the powder and increasing the mixture in the raw material powder.

[0017] (3) The present invention provides a backflow prevention device, and cooperates with a U-shaped hollow plate, a round rod, a spoiler, a fixed ring, a vertical plate, a circular ring, a swing plate, an elastic arc sheet and an arc shell to continuously change the disturbance range of the spoiler during the rotation of the spoiler, thereby improving the uniformity of the disturbance of the powder by the spoiler, that is, to avoid uneven distribution of the powder drawn by the exhaust fan during the movement, to avoid clogging of some air guns due to excessive powder adhesion, and to prevent the powder from accumulating inside the conveying pipe due to reduced extraction effect; and to rely on the swing plate and the elastic arc sheet to push the raw material blocks with positioning deviation, so as to facilitate the spiral conveying sheet to push and convey, and prevent the raw material blocks from being retained inside the conveying pipe. At the same time, the arc surface of the arc shell effectively blocks the refluxed gas and powder, and prevents the powder from getting stuck in the gaps between the surrounding parts and causing erosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the present invention as a whole; Figure 2 It is a schematic diagram of the internal structure of the present invention as a whole; Figure 3It is a schematic diagram of the anti-corrosion device of the present invention; Figure 4 It is a schematic cross-sectional view of the whole anti-corrosion device of the present invention; Figure 5 It is a schematic diagram of the anti-mixing device of the present invention; Figure 6 It is a schematic diagram of the anti-mixing device of the present invention from the left side perspective; Figure 7 For the present invention Figure 6 A schematic diagram of the structure enlargement in the middle; Figure 8 It is a schematic diagram of the backflow prevention device of the present invention; Fig. 9 It is a schematic diagram of the backflow prevention device of the present invention from the left side perspective.

[0019] In the figure: 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 conveying sheet; 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. round roller; 57. vibrating plate; 6. anti-backflow device; 61. round rod; 62. spoiler; 63. fixing ring; 64. vertical plate; 65. circular ring; 66. swing plate; 67. elastic arc sheet; 68. arc shell. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] See also Figure 1-Figure 9 An embodiment of the present invention is: a NdFeB powder preparation device, comprising a base 1, a fixing plate 2 is arranged on the right side of the top of the base 1, a motor 21 is arranged on the left side of the fixing plate 2, and the motor 21 has a variable speed function, two arc surface support plates 3 are symmetrically arranged on the top of the base 1, arc grooves are opened inside the two arc surface support plates 3, a plurality of friction rollers 31 are arranged inside the arc grooves of the arc surface support plates 3, a preparation component 32 is arranged inside the arc surface 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, and a sealing door 33 is arranged 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 with the left side of the preparation component 32, a feeding component 42 is fixedly installed on the left side of the top of the base 1, and a feeding port is opened inside the feeding component 42, 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 sheet 44 is fixedly installed on the outer wall of the right end of the electric rotating rod 43, a sliding ring 45 is penetrated and movably installed on the outer wall of the reciprocating spiral groove of the electric rotating rod 43, a plurality of connecting rods 46 are equidistantly and fixedly installed 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 penetrated and fixedly installed on the top of the heating component 47, a baffle 49 is hinged on the left side of the inner wall of the feed port of the feeding component 42 through a torsion spring, and a sliding block 410 is slidably installed on the side of the baffle 49 close to the L-shaped rod 48.

[0022] The outer wall of the conveying pipe 41 is fixedly installed inside the feeding component 42, the outer wall of the heating component 47 is slidably installed on the inner wall of the conveying pipe 41, the top right end of the L-shaped rod 48 is movable and penetrates the inside of the feeding component 42, and the left side of the outer wall of the sliding block 410 is hinged at the top right end of the L-shaped rod 48. Through the above cooperation, the raw materials are driven to be transported to the inside of the preparation component 32 during the rotation of the spiral conveying sheet 44, and a continuous and uninterrupted feeding process is always maintained, which reduces the labor intensity of the staff and improves the preparation efficiency of NdFeB; through the above cooperation, the activity range of the heating component 47 is effectively expanded, and the heat energy emitted by the heating component 47 is used to heat the inside of the conveying pipe 41, that is, the moisture corroded by the raw material is evaporated in time, so as to avoid the NdFeB raw material being corroded by moisture during the preparation process and thus corrosion, and to avoid the reduction of the magnetism and use performance of NdFeB; at the same time, the baffle 49 is constantly swung to change the spacing of the feed port, thereby realizing indirect feeding and preventing the grinding fineness from being reduced due to excessive feeding.

[0023] During use, after the grinding balls are placed into the preparation component 32 through the sealing door 33, the sealing door 33 is closed to form a sealed space in the preparation component 32, and then the NdFeB raw material is placed into the conveying pipe 41 through the feeding port of the feeding component 42. Prior to this, the electric rotating rod 43 is started, and the electric rotating rod 43 drives the spiral conveying sheet 44 to rotate when it rotates. When the feeding is completed, the motor 21 is started, and 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. Through the above cooperation, the raw material is transported to the preparation component 32 during the process of the spiral conveying sheet 44 rotating, and a continuous and uninterrupted feeding process is always maintained, which reduces the labor intensity of the staff and improves the preparation efficiency of NdFeB. 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, so that the sliding ring 45 can slide to the right along its outer wall and reset when the electric rotating rod 43 rotates, and the sliding ring 45 drives the connecting rod 46 to move synchronously, and the connecting rod 46 drives the heating The heating assembly 47 slides synchronously along the inner wall of the conveying pipe 41. When the heating assembly 47 moves horizontally to the right, it drives the L-shaped rod 48 to slide synchronously along the slide 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 contact 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 center, and the baffle 49 rotates synchronously with its own hinge axis under the contact of the L-shaped rod 48, and drives The movable baffle 49 flips upward with the hinge axis as the axis, and the above cooperation effectively expands the activity range of the heating component 47, and relies on the heat energy emitted by the heating component 47 to heat up the inside of the conveying pipe 41, that is, timely evaporates the moisture corroded by the raw material, avoids the NdFeB raw material from being corroded by moisture during the preparation process and thus corrosion, and avoids the reduction of the magnetism and performance of the NdFeB; at the same time, the baffle 49 is constantly swinging to change the spacing of the feed port, thereby realizing indirect feeding and preventing excessive feeding from reducing the grinding fineness.

[0024] See also Figure 1-Figure 9 , based on the above embodiment, 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 left outer wall 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 exhaust fan 51, the left side of the air gun 53 is fixedly installed on the right side of the spiral hose 52, and 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, a number of circular grooves are equidistantly provided inside the sealing plate 54, and 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 spillover is reduced by relying on the shielding of the sealing plate 54, that is, the heating rate inside the conveying pipe 41 is effectively improved within the same time. At the same time, the exhaust fan 51 draws the powder on the surface of the raw material out of the conveying pipe 41 to prevent the powder from mixing with the raw material and simultaneously delivers it into the preparation component 32 to avoid the powder from mixing in the finished NdFeB powder, thereby reducing its own 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 passes through and is 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 away from one end of 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 flow rate of the airflow inside the conveying pipe 41 is accelerated by relying on the vibration force, that is, the drying speed of the moisture by heat is accelerated, so as to ensure the overall dryness inside the conveying pipe 41, and avoid the dust raised when the raw material falls from adhering to the inner wall of the conveying pipe 41 due to moisture, thereby reducing the extraction effect of the exhaust fan 51 on the powder, resulting in an increase in the mixture in the raw material powder.

[0027] When in use, the heating component 47 moves and resets, driving 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, and the exhaust fan 51 is started at this time, and the exhaust fan 51 transmits the suction force to the air gun 53 through the spiral hose 52, and the air gun 53 absorbs the dust raised when the raw material falls. Through the above cooperation, the heat spillage is reduced by relying on the shielding of the sealing plate 54, that is, the heating rate inside the conveying pipe 41 is effectively improved within the same length of time. At the same time, the exhaust fan 51 extracts the powder on the surface of the raw material from the inside of the conveying pipe 41 to prevent the powder from mixing with the raw material and synchronously feed it into the preparation component 32 to avoid the powder from mixing in the NdFeB powder product, thereby reducing its own high coercive force and high magnetism. Advantages; when the sealing plate 54 moves to the right, it drives the U-shaped hollow plate 55 to move synchronously, and the U-shaped hollow plate 55 drives the round roller 56 Synchronous movement, as the U-shaped hollow plate 55 moves to the right, the round roller 56 contacts the bottom arc surface of the vibration plate 57 to generate resistance force, as the U-shaped hollow plate 55 continues to move, friction force is generated between the round roller 56 and the bottom arc surface of the vibration plate 57, at this time, the round roller 56 rotates on the inner wall of the U-shaped groove of the U-shaped hollow plate 55, and at the same time, the U-shaped hollow plate 55 pulls the vibration plate 57 to bend and deform, when the U-shaped hollow plate 55 passes through the vibration plate 57, the vibration plate 57 will swing back and forth in the process of recovering its own toughness to generate vibration, through the above coordination, the flow rate of the airflow inside the conveying pipe 41 is accelerated by relying on the vibration force, that is, the drying speed of moisture by heat is accelerated, the overall dryness inside the conveying pipe 41 is ensured, and the dust raised when the raw material falls is prevented from adhering to the inner wall of the conveying pipe 41 due to moisture, thereby reducing the extraction effect of the exhaust fan 51 on the powder, resulting in an increase in the mixture in the raw material powder.

[0028] See also Figure 1-Figure 9 , based on the above embodiment, another embodiment of the present invention further includes a backflow prevention device 6; The backflow prevention device 6 includes a round rod 61, an interfering flow plate 62, a fixed ring 63, a plurality of vertical plates 64 and a circular ring 65. The outer wall of the round rod 61 passes through and is rotatably installed inside the right end of the U-shaped hollow plate 55. The interfering flow 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, the plurality of 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, and the outer wall of the circular ring 65 passes through and is 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 interference flow plates 62 are equidistantly distributed on the outer wall of the round rod 61, the fixed ring 63 is located on the right side of the round rod 61, and the inside of the circular ring 65 is located on the movement trajectory of the spiral groove at the right end of the round rod 61, the above coordination can continuously change the disturbance range of the spoiler 62 during the rotation of the spoiler 62, thereby improving the uniformity of the disturbance of the powder by the spoiler 62, that is, avoiding the uneven distribution of the powder drawn by the exhaust fan 51 during the movement, avoiding the blockage of some air guns 53 due to excessive powder adhesion, and preventing the powder from accumulating inside the conveying pipe 41 due to reduced extraction effect.

[0030] The backflow prevention device 6 also includes a plurality of swing plates 66, elastic arc sheets 67 and an arc shell 68. The left sides of the plurality of swing plates 66 are hinged to the edge of the outer wall of the right side of the fixed ring 63 through a torsion spring. The left side of the swing plate 66 is located on the movement trajectory of the right end of the round rod 61. The left side of the elastic arc sheet 67 is fixedly installed on the right side of the swing plate 66. The right side of the arc shell 68 is fixedly installed on the left side of the fixed ring 63. Through the above cooperation, the swing plate 66 and the elastic arc sheet 67 are used to push the raw material blocks with positioning deviation, so as to facilitate the spiral conveying sheet 44 to push and convey, and prevent the raw material blocks from being retained in the conveying pipe 41. At the same time, the arc surface of the arc shell 68 is used to effectively block the refluxed gas and powder, and prevent the powder from being stuck in the gaps between the surrounding parts and causing erosion.

[0031] When in use, the U-shaped hollow plate 55 moves to the right and resets, driving the round rod 61 to move synchronously, and the round rod 61 drives the spoiler 62 to move synchronously. At the same time, during the movement of the round rod 61, it will contact the inside of the circular ring 65. At this time, the fixing ring 63 and the vertical plate 64 limit the circular ring 65 to keep it stable and stationary. When the round rod 61 enters the inside of the circular ring 65 and moves horizontally, the spiral groove drives the round rod 61 to generate a rotating force and begins to rotate along the right end of the U-shaped hollow plate 55. The round rod 61 drives the spoiler 62 to rotate. Through the above cooperation, the disturbance range of the spoiler 62 is continuously changed during the rotation of the spoiler 62, thereby improving the uniformity of the disturbance of the powder by the spoiler 62, that is, avoiding the uneven distribution of the powder drawn by the exhaust fan 51 during the movement, avoiding the blockage of some air guns 53 due to excessive powder adhesion, and preventing the powder from being The raw material blocks are not accumulated inside the conveying pipe 41 due to the reduced extraction effect; the round rod 61 contacts the swing plate 66 during the rightward movement to generate a resistance force, and the swing plate 66 causes its own hinge axis to start rotating through the resistance force, and the swing plate 66 flips to the right with the hinge axis as the axis, and the swing plate 66 drives the elastic arc piece 67 to move synchronously, and the elastic arc piece 67 pushes the falling raw material blocks through its own arc surface, and at the same time, the arc shell 68 facilitates the external airflow to enter 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 piece 67 are used to push the raw material blocks with positioning deviation, which facilitates the spiral conveying sheet 44 to push and convey, and prevents the raw material blocks from being accumulated inside the conveying pipe 41. At the same time, the arc surface of the arc shell 68 is used to effectively block the reflux gas and powder, and prevent the powder from being stuck in the gaps between the surrounding parts and causing erosion.

[0032] A method for preparing NdFeB powder comprises the following steps: S1: After the grinding balls are placed into the preparation assembly 32 through the sealing door 33, the sealing door 33 is closed to form a sealed space in the preparation assembly 32, and then the NdFeB raw material is placed into the conveying pipe 41 through the feeding port of the feeding assembly 42; S2: before this, the electric rotating rod 43 is started, and the electric rotating rod 43 drives the spiral conveying sheet 44 to rotate when rotating. When the feeding is completed, the motor 21 is started, and the output end of the motor 21 drives the preparation component 32 to rotate, and the grinding balls inside the preparation component 32 rotate synchronously to grind the raw materials into powder; S3: 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, so that the sliding ring 45 can slide to the right along its outer wall and reset 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 sliding groove opened on the top of the conveying pipe 41; S4: At this time, the top right end of the L-shaped rod 48 will contact the sliding block 410, and 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 contact 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 specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for preparing NdFeB powder, comprising a base (1), characterized in that: A fixing plate (2) is arranged on the right side of the top of the base (1), a motor (21) is arranged on the left side of the fixing plate (2), and the motor (21) has a variable speed function; two arc surface support plates (3) are symmetrically arranged on the top of the base (1), arc grooves are provided inside the two arc surface support plates (3), a plurality of friction rollers (31) are arranged inside the arc grooves of the arc surface support plates (3), a preparation component (32) is arranged inside the arc surface 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), and a sealing door (33) is arranged 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) comprises a conveying pipe (41), the right side of the conveying pipe (41) being rotatably mounted on the left side of the preparation component (32), the right side of the conveying pipe (41) being connected to the left side of the preparation component (32), a feeding component (42) being fixedly mounted on the left side of the top of the base (1), and a feeding port being provided inside the feeding component (42), an electric rotating rod (43) being rotatably mounted on the left side of the inner wall of the conveying pipe (41), a reciprocating spiral groove being provided on the outer wall of the left end of the electric rotating rod (43), and a spiral conveying sheet (43) being fixedly mounted on the outer wall of the right end of the electric rotating rod (43) 44), a sliding ring (45) is movably installed through the outer wall of the reciprocating spiral groove of the electric rotating rod (43), a plurality of connecting rods (46) are equidistantly and fixedly installed 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 pierced through the top of the heating component (47) and fixedly installed, a baffle (49) is hingedly connected to the left side of the inner wall of the feed port of the feed component (42) through a torsion spring, and a sliding block (410) is slidably installed on the side of the baffle (49) close to the L-shaped rod (48).

2. The NdFeB powder preparation device according to claim 1, characterized in that: The outer wall of the conveying pipe (41) is fixedly mounted inside the feeding assembly (42), the outer wall of the heating assembly (47) is slidably mounted on the inner wall of the conveying pipe (41), the top right end of the L-shaped rod (48) movably passes 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 NdFeB powder preparation device according to claim 2, characterized in that: The anti-mixing device (5) comprises 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 mounted on the left outer wall of the delivery pipe (41); the left end of the spiral hose (52) passes through and is fixedly mounted on the right side of the exhaust fan (51); the left side of the air gun (53) is fixedly mounted on the right side of the spiral hose (52); and the right side of the sealing plate (54) is fixedly mounted on the left side of the heating component (47).

4. The NdFeB powder preparation device according to claim 3, characterized in that: A plurality of circular grooves are equidistantly formed inside the sealing plate (54), and the plurality of circular grooves and the connecting rod (46) are staggeredly distributed, so that the right side of the air gun (53) fits with the left side of the circular groove of the sealing plate (54).

5. The NdFeB powder preparation device according to claim 4, characterized in that: The anti-mixing device (5) further comprises 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) penetrates through and is fixedly mounted inside the sealing plate (54); a U-shaped groove is provided on the left side of the U-shaped hollow plate (55); both ends of the round roller (56) are rotatably mounted inside the U-shaped groove of the U-shaped hollow plate (55); an end of the vibrating plate (57) away from the U-shaped hollow plate (55) is fixedly mounted on the inner wall of the conveying pipe (41); and the vibrating plate (57) is located on the motion trajectory of the left end of the U-shaped hollow plate (55).

6. The NdFeB powder preparation device according to claim 5, characterized in that: The backflow prevention device (6) comprises a round rod (61), a spoiler plate (62), a fixed ring (63), a plurality of vertical plates (64) and a circular ring (65); the outer wall of the round rod (61) penetrates through and is rotatably mounted inside the right end of the U-shaped hollow plate (55); the plurality of spoilers (62) are fixedly mounted on the outer wall surface of the round rod (61); the outer wall of the fixed ring (63) is fixedly mounted on the inner wall of the delivery pipe (41); the plurality of vertical plates (64) are equidistantly and fixedly mounted on a side of the fixed ring (63) away from the inner wall of the delivery pipe (41); and the outer wall of the circular ring (65) penetrates through and is fixedly mounted inside the vertical plates (64).

7. The NdFeB powder preparation device according to claim 6, characterized in that: A spiral groove is formed on the outer wall of the right end of the round rod (61); a plurality of spoilers (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 interior of the circular ring (65) is located on the movement trajectory of the spiral groove on the right end of the round rod (61).

8. The NdFeB powder preparation device according to claim 7, characterized in that: The backflow prevention device (6) further comprises a plurality of swing plates (66), elastic arc sheets (67) and an arc surface shell (68); the left sides of the plurality of swing plates (66) are hinged to the edge of the right outer wall of the fixing ring (63) via a torsion spring; the left side of the swing plate (66) is located on the movement track of the right end of the round rod (61); the left side of the elastic arc sheet (67) is fixedly mounted on the right side of the swing plate (66); and the right side of the arc surface shell (68) is fixedly mounted on the left side of the fixing ring (63).

9. A method for preparing NdFeB powder, using the NdFeB powder preparation device according to claim 8, characterized in that: The following steps are involved: S1: After the grinding balls are placed into the preparation component (32) through the sealing door (33), the sealing door (33) is closed to form a sealed space in the preparation component (32), and then the NdFeB raw material is placed into the conveying pipe (41) through the feed port of the feed component (42); S2: before this, the electric rotating rod (43) is started, and when the electric rotating rod (43) rotates, the spiral conveying sheet (44) is driven to rotate. When the feeding is completed, the motor (21) is started, and 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 materials into powder; S3: 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), so that the sliding ring (45) can slide to the right along its outer wall and reset 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 slide groove provided on the top of the conveying pipe (41); S4: At this time, the top right end of the L-shaped rod (48) will contact the sliding block (410), and 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 contact 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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