Neodymium iron boron coarse powder stirring integrated device

Abstract

The invention discloses an integrated neodymium iron boron coarse powder stirring device which is characterized in that an elevator, a guide rail, a vibrating feeder, a screening box, a crusher, a spraying device and a driving stirrer are integrated through ingenious position arrangement and corresponding connection and can be arranged at one station; the hydrogen decrepitation coarse powder processing procedure only needs to be provided with a hydrogen decrepitation station and a neodymium iron boron coarse powder stirring integrated device station, the two stations are transferred on the ground through the charging bucket transfer trolley, additional hoisting is not needed, compact arrangement can be achieved, automatic crushing of oversize materials is achieved through the screening box and the crusher, and coarse powder with the unqualified thickness in the oversize materials is removed; the device has the advantages that the occupied area of equipment in the neodymium-iron-boron coarse powder processing technology can be reduced, repeated transportation and hoisting transfer in the processing process are avoided, the processing efficiency of the neodymium-iron-boron coarse powder processing technology is improved, the labor cost and potential safety hazards are reduced, coarse powder with unqualified thickness in the prepared coarse powder can be reduced, and the product quality is improved. And the adverse effect on the product quality is reduced.

Description

Technical Field

[0001] The invention relates to a NdFeB coarse powder stirring technology, in particular to an NdFeB coarse powder stirring integrated device. Background Art

[0002] At present, in the NdFeB manufacturing industry, the permanent magnet blank processing process is usually smelting → powder making → molding → sintering. Among them, the powder making link usually includes the hydrogen crushing coarse powder processing process and the air flow grinding fine powder processing process.

[0003] The existing coarse powder processing procedure usually first uses a hydrogen crushing furnace to crush the castings obtained in the smelting stage to obtain coarse powder, and then uses a screening machine to screen the coarse powder. During the screening process, the coarse powder with qualified length and width dimensions falls through the screening machine screen (hereinafter the coarse powder falling through the screening machine screen is collectively referred to as undersize material) and is output, while the coarse powder with unqualified length and width dimensions will be retained on the screening machine screen (hereinafter the coarse powder that cannot fall through the screening machine screen is collectively referred to as oversize material) and output. The current hydrogen crushing coarse powder processing procedure requires that the thickness of the coarse powder produced does not exceed 0.4mm. However, due to the problems of the existing smelting process, there will be a small amount of castings with a thickness greater than 0.4mm. The thickness of the castings belongs to the microscopic size that cannot be reduced by the existing crushing technology. Therefore, a small amount of coarse powder with a thickness greater than 0.4mm will be mixed in the coarse powder after hydrogen crushing. After the coarse powder is sieved, a small amount of coarse powder with a thickness greater than 0.4mm will be mixed in the undersize material, and at the same time, there will be at least several kilograms of oversize material. Only a small part of these oversize materials is greater than 0.4mm in thickness, and most of them are just unqualified in length or width, which can be reduced by crushing. Therefore, currently, the oversize material is usually manually beaten to break it and then returned to the sieving machine for sieving again. After that, the screened materials after the two screenings are combined together and loaded into the material tank and transferred to the three-dimensional mixer. Then, they are hoisted into the three-dimensional mixer. The lubricant is poured into the material tank manually and the material tank is sealed. After that, the material tank is turned over by the three-dimensional mixer to mix the materials in the material tank evenly. The coarse powder processing process is completed.

[0004] In the existing coarse powder processing process, the hydrogen crushing furnace, the screening machine and the three-dimensional mixer are all independently arranged, and the hydrogen crushing furnace and the screening machine are connected by hoisting, and the screening machine and the three-dimensional mixer are connected by hoisting. Not only does the equipment occupy an increased area, but also requires multiple transportation and hoisting of material tanks. The operator has many operating steps and a long working time. In addition, the operation of manually beating all the screened materials to break them and then screening them manually not only increases the operator's operating steps and working time, but also the coarse powder with unqualified thickness in the screened materials will also become the undersize material during the re-screening process, resulting in an increase in the content of coarse powder with unqualified thickness in the final coarse powder. The higher the content of coarse powder with unqualified thickness, the worse the uniformity of the fine powder obtained in the subsequent air flow grinding fine powder processing process, and the greater the adverse impact on product quality. Therefore, the existing coarse powder processing procedure not only consumes a lot of time and manpower, has low processing efficiency and high labor costs, but also poses a great safety hazard due to the frequent use of cranes during the lifting process. All coarse powders with unqualified thickness produced will be transferred to the subsequent air flow grinding powder processing procedure, which has a great adverse impact on product quality. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an integrated NdFeB coarse powder stirring device which can not only reduce the floor space occupied by equipment in the NdFeB coarse powder processing technology, avoid multiple transportation and hoisting transfers during the processing process, improve the processing efficiency of the NdFeB coarse powder processing technology, reduce labor costs and safety hazards, but also reduce the amount of coarse powder with unqualified thickness in the prepared coarse powder and reduce the adverse effects on product quality.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: an integrated NdFeB coarse powder stirring device, including a screening machine, a receiving tank and a tank transfer vehicle for circulating a storage tank containing coarse powder after hydrogen crushing, and also including an elevator, a guide rail, a vibrating feeder, a screening box, a crusher, a spray device and an active mixer. The elevator is used to lift the tank transfer vehicle and the storage tank containing coarse powder after hydrogen crushing circulating thereon to a preset working height. The guide rail is installed on one side of the elevator, and its installation height matches the preset working height. The tank transfer vehicle can be transferred from the elevator to the guide rail and translated on the guide rail to The vibrating feeder is installed under the guide rail at the preset unloading position. When the tank transfer vehicle is located at the preset unloading position on the guide rail, the discharge port of the storage tank containing the coarse powder after hydrogen crushing will be connected with the feed port of the vibrating feeder up and down, so that the coarse powder in the storage tank can be transported to the vibrating feeder. The screening machine is installed under the vibrating feeder, and its feed port is connected with the discharge port of the vibrating feeder. The vibrating feeder is used to transport the coarse powder to the screening machine. The screening machine is used to screen the coarse powder to obtain the coarse powder with qualified length and width as the undersize The material is output through its undersize material outlet, and the coarse powder with uneven length and width as the oversize material is output through its oversize material outlet. The screening box is installed on one side of the screening machine, the feed port of the screening box is connected to the oversize material outlet of the screening machine, the discharge port of the screening box is connected to the feed port of the crusher, the screening box is used to screen out the coarse powder with unqualified thickness mixed in the oversize material transported thereto, and screen out the coarse powder with qualified thickness and transport it to the crusher, the discharge port of the crusher and the undersize material outlet of the screening machine are respectively connected to the feed port of the active mixer, and the crusher is used to screen the oversize material The coarse powder transported to the selection box is crushed to meet the requirements of length and width, and then transported to the active mixer. The spray device is installed on the active mixer. The spray device is used to vaporize the pre-stored liquid lubricant into a spray state and then spray it into the active mixer, so that the coarse powder transported to the active mixer by the crusher and the sifter is wrapped by the lubricant. The active mixer is used to stir the coarse powder and lubricant inside, so that the coarse powder and lubricant are evenly mixed; the receiving tank is located below the active mixer, and the discharge port of the active mixer is connected to the feed port of the receiving tank up and down.

[0007] Compared with the prior art, the present invention has the advantage that by arranging an elevator, a guide rail, a vibrating feeder, a screening box, a crusher, a spray device and an active mixer, after the hydrogen crushing process, the storage tank containing the coarse powder after hydrogen crushing is inverted and installed on the tank circulation vehicle. At this time, the discharge port of the storage tank containing the coarse powder after hydrogen crushing faces downward and extends below the bottom of the tank circulation vehicle. The storage tank containing the coarse powder after hydrogen crushing is transported to the elevator by the tank circulation vehicle. The elevator lifts the tank circulation vehicle and the storage tank containing the coarse powder after hydrogen crushing circulating thereon to a preset working height. The operator climbs up to a suitable height through a preset staircase, pushes the tank circulation vehicle and the storage tank containing the coarse powder after hydrogen crushing circulating thereon onto the guide rail first, and then pushes it along the guide rail to the preset height on the guide rail. The machine stops at the unloading position, and then the operator starts the vibrating feeder, screening box, crusher, spray device and active mixer with one button, and opens the butterfly valve for sealing at the discharge port of the storage tank containing the coarse powder after hydrogen crushing, and then returns to the ground. At the same time, the coarse powder in the storage tank falls under the action of gravity and falls into the vibrating feeder through the discharge port of the storage tank. The vibrating feeder transports the coarse powder that falls thereto to the screening machine, and the screening machine screens the coarse powder there. The coarse powder with qualified length and width becomes the undersize material and is output to the active mixer through its undersize material outlet. The coarse powder with uneven length and width becomes the oversize material and is output to the screening box through its oversize material outlet. The screening box will screen the oversize material mixed with unqualified thickness. The coarse powder is screened out, and the coarse powder with qualified thickness is screened out and transported to the crusher. The crusher crushes the coarse powder transported to it by the screening box, and then transports it to the active mixer after its length and width are qualified. After the spray device is turned on, the quantitative liquid lubricant pre-stored in it will be vaporized into a spray and then sprayed into the active mixer. The coarse powder transported to the active mixer by the crusher and the sifter is wrapped by the lubricant. The active mixer stirs the coarse powder and lubricant inside it to make the coarse powder and lubricant mixed evenly. After the whole process is completed, the operator closes the vibrating feeder, screening box, crusher, spray device and active mixer with one button, opens the butterfly valve for sealing at the feeding port of the receiving tank, and the coarse powder in the active mixer falls into the In the receiving tank, after the material is received, the butterfly valve for sealing at the feeding port of the receiving tank is closed. At this time, the receiving tank can be taken away, and the storage tank and the tank transfer vehicle are transported to the ground by the hoist. Therefore, the present invention combines the three links of screening, crushing and stirring in the hydrogen crushing coarse powder processing process. It only needs to manually transfer the hydrogen crushed coarse powder by the storage tank transfer vehicle. After the storage tank is docked with the vibrating feeder, other equipment can be started at the same time with one key, and other operations in the hydrogen crushing coarse powder processing process can be automatically completed. The operator does not need to perform additional transportation or hoisting. The operator has fewer operating steps and working time, and the safety hazard is low. The screening box is first used to discharge the coarse powder with unqualified thickness in the screened material without entering the subsequent stirring link.Therefore, the present invention can not only reduce the floor space occupied by equipment in the NdFeB coarse powder processing technology, avoid multiple transportation and hoisting transfers during the processing process, improve the processing efficiency of the NdFeB coarse powder processing technology, reduce labor costs and safety hazards, but also reduce the amount of coarse powder with unqualified thickness in the obtained coarse powder, and reduce the adverse effects on product quality.

[0008] Furthermore, the NdFeB coarse powder mixing integrated device also includes a support frame, a weighing device and an alarm device. The active mixer is installed on the support frame and is fully supported by the support frame. The receiving tank is located on the weighing device. The weighing device is connected to the alarm device. The weighing device is used to weigh the receiving tank in real time and feed back the weight to the alarm device. The alarm device determines whether the weight fed back by the weighing device is stable and unchanged within a preset time. If it is stable and unchanged, it indicates that the receiving tank has completed material collection, and the alarm device sounds an alarm.

[0009] Furthermore, the screening box includes a linear vibrating feeder, a roller conveying mechanism, a receiving bin and a receiving box. The feeding port of the linear vibrating feeder serves as the feeding port of the screening box. The linear vibrating feeder is used to convey the coarse powder thereto to the roller conveying mechanism. The roller conveying mechanism includes a plurality of electric rollers, which are evenly spaced along the conveying direction of the linear vibrating feeder. The spacing between two adjacent electric rollers is 0.4 mm. The receiving bin is located below the roller conveying mechanism. The discharging port of the screening box is arranged at the bottom of the receiving bin. The receiving box is arranged at the tail end of the roller conveying mechanism. The roller conveying mechanism can transfer the coarse powder conveyed thereto by the linear vibrating feeder, and make the coarse powder with a thickness not exceeding 0.4 mm fall into the receiving bin from between two adjacent electric rollers. The coarse powder with a thickness exceeding 0.4 mm falls into the receiving box after being transferred to the tail end. The coarse powder in the receiving bin can be output through the discharging port of the screening box under the action of gravity.

[0010] Furthermore, the discharge angle of the discharge port of the storage tank containing the coarse powder after hydrogen crushing does not exceed 70 degrees to avoid bridging phenomenon during the discharge of the coarse powder, ensure the smoothness of the discharge, and improve the discharge speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of a NdFeB coarse powder stirring integrated device of the present invention;

[0012] Figure 2It is a structural schematic diagram of a screening box of a NdFeB coarse powder stirring integrated device of the present invention;

[0013] Figure 3 The present invention is a schematic structural diagram of a storage tank containing coarse powder after hydrogen crushing in a screening box of an integrated NdFeB coarse powder stirring device. DETAILED DESCRIPTION

[0014] The present invention is further described in detail below with reference to the accompanying drawings.

[0015] Embodiment 1: Figure 1As shown, an integrated device for mixing NdFeB coarse powder includes a sieving machine 1, a receiving tank 2, and a tank transfer vehicle 4 for transferring a storage tank 3 filled with coarse powder after hydrogen crushing, and also includes an elevator 5, a guide rail 6, a vibrating feeder 7, a screening box 8, a crusher 9, a spray device 10, and an active mixer 11. The elevator 5 is used to lift the tank transfer vehicle 4 and the storage tank 3 filled with coarse powder after hydrogen crushing flowing thereon to a preset working height. The guide rail 6 is installed on one side of the elevator 5, and its installation height matches the preset working height. The tank transfer vehicle 4 can be transferred from the elevator 5 to the guide rail 6 and The vibrating feeder 7 is installed below the guide rail 6. When the tank transfer vehicle 4 is located at the preset unloading position on the guide rail 6, the discharge port of the storage tank 3 containing the coarse powder after hydrogen crushing will be connected with the feed port of the vibrating feeder 7 up and down, and the coarse powder in it can be transported to the vibrating feeder 7. The screening machine 1 is installed below the vibrating feeder 7, and its feed port is connected with the discharge port of the vibrating feeder 7. The vibrating feeder 7 is used to transport the coarse powder to the screening machine 1. The screening machine 1 is used to screen the coarse powder, and the coarse powder with qualified length and width dimensions is obtained as the screened material. The undersize material is output from the outlet, and the coarse powder with uneven length and width is output as the oversize material through the oversize material outlet. The screening box 8 is installed on one side of the screening machine 1. The feed port of the screening box 8 is connected to the oversize material outlet of the screening machine 1. The discharge port of the screening box 8 is connected to the feed port of the crusher 9. The screening box 8 is used to screen out the coarse powder with unqualified thickness mixed in the oversize material transported thereto, and screen out the coarse powder with qualified thickness and transport it to the crusher 9. The discharge port of the crusher 9 and the undersize material outlet of the screening machine 1 are respectively connected to the feed port of the active mixer 11. The crusher 9 is used to mix the coarse powder transported to it by the screening box 8. The coarse powder at the place is crushed so that its length and width dimensions are qualified and then transported to the active mixer 11. The spray device 10 is installed on the active mixer 11. The spray device 10 is used to vaporize the liquid lubricant pre-stored therein into a spray state and then spray it into the active mixer 11, so that the coarse powder transported to the active mixer 11 by the crusher 9 and the sifter 1 is wrapped by the lubricant. The active mixer 11 is used to stir the coarse powder and lubricant inside so that the coarse powder and lubricant inside are evenly mixed; the receiving tank 2 is located below the active mixer 11, and the discharge port of the active mixer 11 is connected to the feed port of the receiving tank 2 up and down.

[0016] In this embodiment, after the hydrogen crushing process, the storage tank 3 containing the coarse powder after hydrogen crushing is inverted and installed on the tank transfer vehicle 4. At this time, the discharge port of the storage tank 3 containing the coarse powder after hydrogen crushing faces downward and extends to the bottom of the tank transfer vehicle 4. The storage tank 3 containing the coarse powder after hydrogen crushing is transported to the elevator 5 by the tank transfer vehicle 4. The elevator 5 lifts the tank transfer vehicle 4 and the storage tank 3 containing the coarse powder after hydrogen crushing circulating thereon to a preset working height. The operator climbs up to a suitable height through the preset stairs, pushes the tank transfer vehicle 4 and the storage tank 3 containing the coarse powder after hydrogen crushing circulating thereon onto the guide rail 6, and then pushes it along the guide rail 6 to the preset unloading position of the guide rail 6 to stop, and then the operator starts with one key (pre-set the vibrating feeder 7, the screening box 8, and the crusher). 9, the power start buttons of the spray device 10 and the active mixer 11 are connected together, and synchronous power supply start is realized by one-key start) vibrating feeder 7, screening box 8, crusher 9, spray device 10 and active mixer 11, and the butterfly valve for sealing provided at the discharge port of the storage tank 3 containing the coarse powder after hydrogen crushing is opened, and then it returns to the ground. At the same time, the coarse powder in the storage tank 3 falls under the action of gravity, and falls into the vibrating feeder 7 through the discharge port of the storage tank 3. The vibrating feeder 7 transports the coarse powder falling thereto to the sieving machine 1, and the sieving machine 1 siftes the coarse powder thereat. The coarse powder with qualified length and width dimensions becomes the undersize material and is output to the active mixer 11 through its undersize material outlet. The coarse powder with uneven length and width dimensions is used as the oversize material and passes through its sieve. The feeding outlet is output to the screening box 8, the screening box 8 will screen out the coarse powder with unqualified thickness mixed in the screened material transported thereto, and screen out the coarse powder with qualified thickness and transport it to the crusher 9, the crusher 9 will crush the coarse powder transported thereto by the screening box 8, so that its length and width dimensions are qualified, and then it will be transported to the active mixer 11, after the spray device 10 is turned on, the quantitative liquid lubricant pre-stored therein will be vaporized into a spray state and then sprayed into the active mixer 11, the coarse powder transported to the active mixer 11 by the crusher 9 and the screening machine 1 will be wrapped by the lubricant, the active mixer 11 will stir the coarse powder and lubricant therein, so that the coarse powder and the lubricant are evenly mixed, and after the whole process is completed, the operator will turn off the vibrating feeder 7, the screening box 8, The crusher 9, the spray device 10 and the active mixer 11 are used to open the butterfly valve for sealing at the feed inlet of the receiving tank 2. The coarse powder in the active mixer 11 falls into the receiving tank 2 under the action of gravity. After the receiving is completed, the butterfly valve for sealing at the feed inlet of the receiving tank 2 is closed. At this time, the receiving tank 2 can be taken away, and the storage tank 3 and the tank transfer vehicle 4 are transported to the ground through the hoist 5. Therefore, the present invention combines the three links of screening, crushing and stirring in the hydrogen-crushed coarse powder processing process. It only needs to manually transfer the hydrogen-crushed coarse powder using the storage tank 3 transfer vehicle. After the storage tank 3 is docked with the vibrating feeder 7, other equipment can be started at the same time with one button, and other operations in the hydrogen-crushed coarse powder processing process are automatically completed without the need for operators to perform additional transportation.There is no need for hoisting, and the operating steps and operation time of the operator are reduced, which improves the processing efficiency of the NdFeB coarse powder processing technology, reduces labor costs and safety hazards, and first uses the screening box 8 to discharge the coarse powder with unqualified thickness in the screened material without entering the subsequent mixing link, which can reduce the content of coarse powder with unqualified thickness in the prepared coarse powder and reduce the adverse effects on product quality.

[0017] Embodiment 2: This embodiment is basically the same as Embodiment 1, except that: in this embodiment, an integrated NdFeB coarse powder mixing device also includes a support frame 12, a weighing device 13 and an alarm device. The active mixer 11 is installed on the support frame 12 and is fully supported by the support frame 12. The material receiving tank 2 is located on the weighing device 13, and the weighing device 13 is connected to the alarm device. The weighing device 13 is used to weigh the material tank 2 in real time and feed the weight back to the alarm device. The alarm device determines whether the weight fed back by the weighing device 13 is stable and unchanged within a preset time (which can be set according to actual conditions). If it is stable and unchanged, it indicates that the material receiving tank 2 has completed receiving the material, and the alarm device sounds an alarm.

[0018] In this embodiment, the weight of the active mixer 11 is completely borne by the support frame 12, so even if the active mixer 11 is docked with the material receiving tank 2, no pressure will be generated on the docking material tank 2, ensuring that the weight weighed by the weighing device 13 is only the weight of the material receiving tank 2 and the coarse powder therein, and the alarm device can accurately determine whether the weight of the material receiving tank 2 and the coarse powder therein is stable based on the weight feedback from the weighing device 13, so that an alarm can be issued in time to remind the staff after the material receiving is completed, ensuring that the staff can collect the materials in time, and avoiding extra waiting of the staff during the powder making process, thereby avoiding waste of human resources.

[0019] Embodiment 3: This embodiment is basically the same as Embodiment 1, except that: in this embodiment, Figure 2As shown, the screening box 8 includes a linear vibrating feeder 81, a roller conveying mechanism, a receiving bin 82 and a receiving box (not shown in the figure). The feed port of the linear vibrating feeder 81 serves as the feed port of the screening box 8. The linear vibrating feeder 81 is used to convey the coarse powder to the roller conveying mechanism. The roller conveying mechanism includes four electric rollers 83. The four electric rollers 83 are evenly spaced along the conveying direction of the linear vibrating feeder 81. The spacing between two adjacent electric rollers 83 is 0.4 mm. The receiving bin 82 is located at Below the roller conveying mechanism, the discharge port of the screening box 8 is arranged at the bottom of the receiving bin 82, and the receiving box is arranged at the tail end of the roller conveying mechanism. The roller conveying mechanism can transmit the coarse powder delivered to it by the linear vibrating feeder 81, and make the coarse powder with a thickness not exceeding 0.4 mm fall into the receiving bin 82 from between two adjacent electric rollers 83. The coarse powder with a thickness exceeding 0.4 mm falls into the receiving box after being transmitted to the tail end. The coarse powder in the receiving bin 82 can be output through the discharge port of the screening box 8 under the action of gravity.

[0020] In this embodiment, the screening box 8 is provided to automatically screen the screened material, so that the coarse powder in the screened material that is not qualified in length and width but qualified in thickness can enter the crusher 9 for crushing, and becomes the coarse powder with qualified length, width and thickness and flows into the active mixer 11, and the coarse powder with unqualified thickness in the screened material is rejected as unqualified coarse powder to avoid it from flowing into the active mixer 11, thereby reducing the content of coarse powder with unqualified thickness in the coarse powder finally obtained, reducing the adverse effects on product quality, and at the same time, the automatic processing of the screened material is realized through the cooperation of the screening box 8 and the crusher 9, and there is no need to take out the screened material, manually process it and then sieve it, which simplifies the operation steps, saves operation time, further improves the operation efficiency and reduces labor costs.

[0021] Embodiment 4: This embodiment is basically the same as Embodiment 1, except that: in this embodiment, Figure 3 As shown, the discharge angle of the discharge port of the storage tank 3 containing the coarse powder after hydrogen crushing is 60 degrees, so as to avoid the bridging phenomenon in the process of coarse powder discharge, ensure the smoothness of discharge, and improve the discharge speed.

[0022] In summary, the NdFeB coarse powder stirring integrated device of the present invention integrates the hoist 5, the guide rail 6, the vibrating feeder 7, the screening box 8, the crusher 9, the spray device 10 and the active mixer 11 into one by clever position setting and corresponding connection, so that the whole can be set at one station, so as to realize the automatic integration of all processes except hydrogen crushing in the hydrogen crushing coarse powder processing step, so that the hydrogen crushing coarse powder processing step only needs to separately set up the hydrogen crushing station and the station where the NdFeB coarse powder stirring integrated device of the present invention is located, and the hydrogen crushing station and the station where the NdFeB coarse powder stirring integrated device of the present invention are located can be transferred on the ground through a conventional material tank transfer vehicle 4, without the need for additional hoisting, so there is no need to reserve the space required for hoisting, and the hydrogen crushing station and the NdFeB coarse powder stirring integrated device of the present invention are connected. The workstations can be compactly arranged. Therefore, when the NdFeB coarse powder stirring integrated device of the present invention is used to realize the hydrogen crushing coarse powder processing procedure, the equipment is concentrated in position, occupies a small area, and does not require multiple transportation and lifting of material tanks. The operator has fewer operating steps and less working time. There is no safety hazard caused by frequent use of the crane during the lifting process. The screening box 8 and the crusher 9 are used to replace the existing manual operation method of screening the material, which not only simplifies the operation steps of the screened material, saves the operation time, further improves the operation efficiency, and reduces the labor cost, but also can reduce the circulation of coarse powder with unqualified thickness in the screened material, reduce the content of coarse powder with unqualified thickness in the finally obtained coarse powder, improve the uniformity of the fine powder obtained in the subsequent air flow grinding fine powder processing procedure, and reduce the adverse effect on product quality.

Claims

1. An integrated device for stirring NdFeB coarse powder, comprising a sieving machine, a receiving tank and a tank transfer vehicle for transferring a storage tank containing coarse powder after hydrogen crushing, characterized in that It also includes an elevator, a guide rail, a vibrating feeder, a screening box, a crusher, a spray device and an active mixer. The elevator is used to lift the tank transfer vehicle and the storage tank containing the hydrogen-crushed coarse powder flowing on it to a preset working height. The guide rail is installed on one side of the elevator, and its installation height matches the preset working height. The tank transfer vehicle can be transferred from the elevator to the guide rail and translated on the guide rail to a preset unloading position on the guide rail. The vibrating feeder is installed below the guide rail. When the tank transfer vehicle is located at a preset position on the guide rail, the feeder is moved to a preset position on the guide rail. When the feeder is in the unloading position, the discharge port of the storage tank filled with the coarse powder after hydrogen crushing will be connected with the feed port of the vibrating feeder up and down, so that the coarse powder in it can be transported to the vibrating feeder. The screening machine is installed below the vibrating feeder, and its feed port is connected with the discharge port of the vibrating feeder. The vibrating feeder is used to transport the coarse powder to the screening machine, and the screening machine is used to screen the coarse powder, and the coarse powder with qualified length and width dimensions is output as the undersize material through its undersize material outlet, and the coarse powder with uneven length and width dimensions is output as the oversize material through its screening machine. The feed outlet is output, the screening box is installed on one side of the screening machine, the feed port of the screening box is connected to the screen material outlet of the screening machine, the discharge port of the screening box is connected to the feed port of the crusher, the screening box is used to screen out the coarse powder with unqualified thickness mixed in the screen material transported thereto, and screen out the coarse powder with qualified thickness and transport it to the crusher, the discharge port of the crusher and the screen material outlet of the screening machine are respectively connected to the feed port of the active mixer, and the crusher is used to crush the coarse powder transported thereto by the screening box to make it long After the length and width dimensions are qualified, they are transported to the active mixer. The spray device is installed on the active mixer. The spray device is used to gasify the pre-stored liquid lubricant into a spray state and then spray it into the interior of the active mixer, so that the coarse powder transported to the interior of the active mixer by the crusher and the sifter is wrapped by the lubricant. The active mixer is used to stir the coarse powder and lubricant inside so that the coarse powder and lubricant are evenly mixed; the receiving tank is located below the active mixer, and the discharge port of the active mixer is connected to the feed port of the receiving tank up and down.

2. The NdFeB coarse powder stirring integrated device according to claim 1, characterized in that It also includes a support frame, a weighing device and an alarm device. The active mixer is installed on the support frame and is fully supported by the support frame. The material receiving tank is located on the weighing device. The weighing device is connected to the alarm device. The weighing device is used to weigh the material receiving tank in real time and feed back the weight to the alarm device. The alarm device determines whether the weight fed back by the weighing device is stable and unchanged within a preset time. If it is stable and unchanged, it indicates that the material receiving tank has completed material collection, and the alarm device sounds an alarm.

3. The NdFeB coarse powder stirring integrated device according to claim 1, characterized in that The screening box comprises a linear vibrating feeder, a roller conveying mechanism, a receiving bin and a receiving box. The feeding port of the linear vibrating feeder serves as the feeding port of the screening box. The linear vibrating feeder is used to convey the coarse powder therein to the roller conveying mechanism. The roller conveying mechanism comprises a plurality of electric rollers, which are evenly spaced along the conveying direction of the linear vibrating feeder. The spacing between two adjacent electric rollers is 0.4 mm. The receiving bin is located below the roller conveying mechanism. The discharging port of the screening box is arranged at the bottom of the receiving bin. The receiving box is arranged at the tail end of the roller conveying mechanism. The roller conveying mechanism can transfer the coarse powder conveyed thereto by the linear vibrating feeder, and make the coarse powder with a thickness not exceeding 0.4 mm fall into the receiving bin from between two adjacent electric rollers. The coarse powder with a thickness exceeding 0.4 mm falls into the receiving box after being transferred to the tail end. The coarse powder in the receiving bin can be output through the discharging port of the screening box under the action of gravity.

4. The NdFeB coarse powder stirring integrated device according to claim 1, characterized in that The discharge angle of the discharge port of the storage tank containing the hydrogen-crushed coarse powder does not exceed 70 degrees.

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