WO2021062652A1

WO2021062652A1 - Rapid air-current mill for producing neodymium-iron-boron permanent magnet

Info

Publication number: WO2021062652A1
Application number: PCT/CN2019/109498
Authority: WO
Inventors: 朱明�
Original assignee: 江西荧光磁业有限公司
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2021-04-08

Abstract

A rapid air-current mill for producing a neodymium-iron-boron permanent magnet. The air-current mill comprises a device frame (1). Shock-absorbing supports (2) are fixedly mounted at the lower end of the device frame (1), buffer springs (3) are movably mounted on the shock-absorbing supports (2), and adjustable supporting legs (4) are movably mounted at the lower ends of the shock-absorbing supports (2). A material taking opening (10) is formed in the middle of the upper end of the device frame (1), and a feeding opening (11) is fixedly formed at the right end of the material taking opening (10). A crushing chamber (6) is formed in the inner side of the device frame (1), a wear-resisting plate (5) is movably mounted on the inner side of the crushing chamber (6), and acceleration nozzles (7) are fixedly connected to the middle end of the inner side of the crushing chamber (6). An acceleration cavity (20) is formed in the inner side of the acceleration nozzle (7), rifling (21) is fixedly mounted in the acceleration cavity (20), and an air outlet hole (22) is reserved at the lower end of the acceleration cavity (20). A locking column (18) is fixedly mounted at the lower end of a fixing plate (19). According to the rapid air-current mill for producing the neodymium-iron-boron permanent magnet, materials can be machined and formed at one time, secondary machining is avoided, the machining speed is increased, the operation cost is reduced, and the working efficiency is improved.

Description

A fast jet mill for the production of neodymium iron boron permanent magnets

Technical field

The invention relates to the technical field of the production of neodymium iron boron permanent magnets, in particular to a rapid jet mill for the production of neodymium iron boron permanent magnets.

Background technique

Neodymium iron boron permanent magnet is a kind of artificial powerful permanent magnet and the strongest permanent magnet at present. Neodymium iron boron magnets can be divided into bonded neodymium iron boron and sintered neodymium iron boron. Bonding is actually injection molding. The sintering process is formed by vacuuming and heating at high temperature, and has the characteristics of small size, light weight and strong magnetism. It is the magnet with the best performance-to-price ratio at present.

However, the jet mills on the existing market are slow in use. If speed is pursued, the quality of the product cannot be guaranteed, which will damage the machine, shorten the use time of the equipment, and increase the workload of the staff. In addition to operating costs, the corresponding returns cannot be obtained, and work efficiency cannot be improved.

Summary of the invention

The purpose of the present invention is to provide a fast jet mill for the production of neodymium iron boron permanent magnets, so as to solve the problem that the jet mills on the market mentioned in the background art are slow in use. If speed is pursued, the quality of the product cannot be obtained. If it is guaranteed, it will damage the machine, shorten the use time of the equipment, and increase the workload of the staff, which not only increases the cost of operation, but also cannot get the corresponding return and cannot improve the work efficiency.

In order to achieve the above objective, the present invention provides the following technical solution: a rapid jet mill for the production of neodymium iron boron permanent magnets, comprising an equipment rack, the lower end of the equipment rack is fixedly installed with a shock-absorbing bracket, the shock-absorbing bracket A buffer spring is movably installed on the upper end, adjustable feet are movably installed on the lower end of the shock-absorbing bracket, a material reclaiming port is opened in the middle of the upper end of the equipment frame, and a feeding port is fixedly installed at the right end of the material reclaiming port. The inside of the equipment frame is provided with a crushing chamber, the inside of the crushing chamber is movably installed with a wear plate, the inner middle end of the crushing chamber is fixedly connected with an acceleration nozzle, and the inside of the acceleration nozzle is provided with an acceleration cavity, the A rifle wire is fixedly installed in the acceleration cavity, an air outlet is reserved at the lower end of the acceleration cavity, a locking device is movably installed on the outside of the crushing chamber, an unlocking device is movably installed on the outside of the locking device, and the lock A relaxation shaft is movably installed at the upper end of the inner side of the tightening device, a fixed shaft is movably installed at the lower end of the relaxation shaft, a connecting plate is fixedly installed between the fixed shaft and the relaxation shaft, and the connecting plate and the locking device are movably installed There is a return spring, the inner lower end of the locking device is fixedly installed with a guide plate, the inner side of the guide plate is movably installed with a fixed plate, the inner side of the fixed plate is movably installed with a telescopic spring, and the lower end of the fixed plate is fixedly installed There is a locking column.

Preferably, four shock-absorbing brackets are arranged at equal intervals at the lower end of the equipment rack, and the structural dimensions of the shock-absorbing brackets are the same.

Preferably, two groups of acceleration nozzles are symmetrically arranged in the pulverizing chamber, and at least three rifles are arranged in the acceleration nozzle.

Preferably, there are two locking devices symmetrically arranged with respect to the crushing chamber, and one locking device is also provided at the lower end of the crushing chamber, and the three locking devices have the same structure.

Preferably, there are two loose shafts symmetrically arranged with respect to the locking column, and the length of the loose shaft is greater than the length of the fixed shaft.

Preferably, there are two connecting plates symmetrically arranged with respect to the locking column, and the position of the connecting plate and the position of the fixed shaft correspond to each other one-to-one.

Compared with the prior art, the beneficial effect of the present invention is that the rapid jet mill for the production of neodymium iron boron permanent magnets is designed on the basis of the existing jet mill, and can be replaced quickly and easily by adding resistance The grinding plate can be replaced quickly and conveniently. After a long time of use, the internal wear plate of the equipment will be worn, making the jet mill unable to work and reducing the work efficiency, changing the structure to reduce the difficulty of replacement, and matching The nozzle that increases the fineness of the material can make the processing of the material form one time, avoid secondary processing, speed up the processing speed, reduce operating costs, and improve work efficiency.

Description of the drawings

Figure 1 is a front perspective structural schematic diagram of the present invention;

Figure 2 is a schematic diagram of the structure of the locking device of the present invention;

Figure 3 is a schematic diagram of the structure of the acceleration nozzle of the present invention.

In the picture: 1. Equipment rack; 2. Shock absorber bracket; 3. Buffer spring; 4. Adjustable feet; 5. Wear plate; 6. Crushing chamber; 7. Accelerating nozzle; 8. Locking device; 9. Unlocking device; 10. Reclaiming port; 11. Feeding port; 12. Release shaft; 13. Return spring; 14. Fixed shaft; 15. Connecting plate; 16. Guide plate; 17. Telescopic spring; 18. Locking column; 19. Fixed plate; 20. Accelerating cavity; 21. Rifle line; 22. Air outlet.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Referring to Figures 1-3, the present invention provides a technical solution: a rapid jet mill for the production of neodymium iron boron permanent magnets, including an equipment rack 1, a shock-absorbing bracket 2 is fixedly installed at the lower end of the equipment rack 1, and The shock bracket 2 is movably installed with a buffer spring 3, the lower end of the shock absorbing bracket 2 is movably installed with an adjustable foot 4, and the middle of the upper end of the equipment rack 1 is provided with a reclaiming port 10, and the right end of the reclaiming port 10 is fixedly installed with a feeding port 11. The inside of the equipment rack 1 is provided with a crushing chamber 6, the inside of the crushing chamber 6 is movably installed with a wear plate 5, the inner middle end of the crushing chamber 6 is fixedly connected with an acceleration nozzle 7, and the inside of the acceleration nozzle 7 is provided with an acceleration cavity 20. A rifle wire 21 is fixedly installed in the acceleration cavity 20, an air outlet 22 is reserved at the lower end of the acceleration cavity 20, a locking device 8 is movably installed on the outside of the crushing chamber 6, and an unlocking device 9 is movably installed on the outside of the locking device 8 , The upper end of the inner side of the locking device 8 is movably installed with a loose shaft 12, the lower end of the loose shaft 12 is movably installed with a fixed shaft 14, and a connecting plate 15 is fixedly installed between the fixed shaft 14 and the loose shaft 12, the connecting plate 15 and the locking device A return spring 13 is movably installed between 8 and a guide plate 16 is fixedly installed at the lower end of the inner side of the locking device 8. A fixed plate 19 is movably installed on the inner side of the guide plate 16 and a retractable spring 17 is movably installed on the inner side of the fixed plate 19, and the fixed plate A locking column 18 is fixedly installed at the lower end of 19;

Further, four shock-absorbing brackets 2 are provided at equal intervals at the lower end of the equipment rack 1, and the structural dimensions of the shock-absorbing brackets 2 are the same, which facilitates the adjustment and calibration of the equipment;

Further, two groups of acceleration nozzles 7 are symmetrically arranged in the crushing chamber 6, and at least three reciprocating lines 21 are arranged in the acceleration nozzle 7, to increase the speed of the air flow, so that the air discharged from the air outlet 22 has a higher initial velocity. ；

Furthermore, there are two locking devices 8 symmetrically arranged with respect to the crushing chamber 6, and one locking device 8 is also provided at the lower end of the crushing chamber 6, and the three locking devices 8 have the same structure, which is convenient for the crushing chamber 6. The wear plate 5 is replaced;

Further, there are two loose shafts 12 symmetrically arranged with respect to the locking column 18, and the length of the loose shaft 12 is greater than the length of the fixed shaft 14, which facilitates the distinction between the loose shaft 12 and the fixed shaft 14 to prevent operation errors;

Further, there are two connecting plates 15 symmetrically arranged with respect to the locking column 18, and the position of the connecting plate 15 and the position of the fixed shaft 14 correspond to each other one-to-one, which facilitates locking and makes replacement more convenient.

Working principle: As shown in Figure 1, after the equipment rack 1 is installed through the shock-absorbing bracket 2, the height of the equipment rack 1 is adjusted through the adjustable feet 4, the power supply box is connected to the air source, and the feeding port 11 is used to adjust the height of the equipment rack 1. The raw material is added to the crushing chamber 6 and crushed by the acceleration nozzle 7. During the crushing process, the shaking will be absorbed and released by the shock-absorbing bracket 2 and the buffer spring 3, which can use higher power. After the crushing is completed, The product is taken out from the material port 10 for subsequent processing. As shown in Figure 2, when the wear plate 5 needs to be replaced, the shaft 12 is released by pressing, so that the protrusions on the fixed shaft 14 are taken out from the fixed plate 19, Move downwards under the action of the retractable spring 17 to remove the fixation of the wear plate 5. After the replacement is completed, push the locking column 18 up, and the fixed shaft 14 clamps the fixed plate 19 to complete the fixation, as shown in Figure 3, After the source gas enters the acceleration cavity 20 in the acceleration nozzle 7, it will be divided by the rifle 21 to increase the speed of the gas, so that the gas can be expelled from the gas outlet 22 at an accelerated rate, and the raw materials are smashed. Work, save the replacement time of the wear plate 5, and work more efficiently and quickly.

Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. And variations, the scope of the present invention is defined by the appended claims and their equivalents.

Claims

A rapid jet mill for the production of neodymium iron boron permanent magnets, comprising an equipment frame (1), characterized in that: a shock-absorbing bracket (2) is fixedly installed at the lower end of the equipment frame (1), and the shock-absorbing bracket (2) is fixedly installed at the lower end of the equipment frame (1). A buffer spring (3) is movably installed on the bracket (2), an adjustable foot (4) is movably installed on the lower end of the shock-absorbing bracket (2), and a material reclaiming port is opened in the middle of the upper end of the equipment rack (1) (10), a feeding port (11) is fixedly installed at the right end of the material taking port (10), a crushing chamber (6) is opened on the inner side of the equipment frame (1), and the inner side of the crushing chamber (6) A wear-resistant plate (5) is movably installed, an acceleration nozzle (7) is fixedly connected to the inner middle end of the crushing chamber (6), and an acceleration cavity (20) is opened on the inner side of the acceleration nozzle (7). A rifle wire (21) is fixedly installed in the cavity (20), an air outlet (22) is reserved at the lower end of the acceleration cavity (20), and a locking device (8) is movably installed on the outside of the crushing chamber (6) An unlocking device (9) is movably installed on the outer side of the locking device (8), a relaxation shaft (12) is movably installed on the inner upper end of the locking device (8), and the lower end of the relaxation shaft (12) is movable A fixed shaft (14) is installed, a connecting plate (15) is fixedly installed between the fixed shaft (14) and the relaxing shaft (12), and the connecting plate (15) and the locking device (8) are movably installed between There is a return spring (13), the inner lower end of the locking device (8) is fixedly installed with a guide plate (16), the inner side of the guide plate (16) is movably installed with a fixed plate (19), and the fixed plate ( A telescopic spring (17) is movably installed on the inner side of 19), and a locking column (18) is fixedly installed on the lower end of the fixing plate (19).
A rapid jet mill for the production of neodymium iron boron permanent magnets according to claim 1, characterized in that: the shock-absorbing brackets (2) are arranged at equal intervals at the lower end of the equipment rack (1), and The structural dimensions of the shock-absorbing bracket (2) are the same.
A rapid jet mill for the production of neodymium iron boron permanent magnets according to claim 1, characterized in that: the acceleration nozzles (7) are symmetrically arranged in two groups in the crushing chamber (6), and the acceleration nozzles (7) There are at least three rifle lines (21) in ).
A rapid jet mill for the production of neodymium iron boron permanent magnets according to claim 1, characterized in that: the locking device (8) is symmetrically provided with two locking devices (8) with respect to the crushing chamber (6), and the locking device ( 8) One is also provided at the lower end of the crushing chamber (6), and the three locking devices (8) have the same structure.
A rapid jet mill for the production of neodymium iron boron permanent magnets according to claim 1, characterized in that: the relaxation shaft (12) is symmetrically arranged with two locking columns (18), and the relaxation shaft (12) ) Is greater than the length of the fixed shaft (14).
A rapid jet mill for the production of neodymium iron boron permanent magnets according to claim 1, characterized in that: the connecting plate (15) is symmetrically arranged with two locking columns (18), and the connecting plate (15) The position of) and the position of the fixed shaft (14) correspond to each other one to one.