Rare earth waste scattering and grinding device

Abstract

The invention relates to the technical field of flour mills, and discloses a rare earth waste scattering and grinding device which comprises a flour mill main body, the upper end of the interior of the flour mill main body is connected with a grading impeller, the interior of the flour mill main body is provided with an inner cylinder, the lower end of the inner cylinder is fixedly connected with a C-shaped wind shield, and the wind shield is fixedly connected with the inner wall of the flour mill main body. And a material returning cavity is formed between the inner cylinder and the inner wall of the flour mill body, the upper end of the interior of the flour mill body is rotationally connected with a gear ring, and the inner side of the gear ring is fixedly connected with a plurality of collecting plates. According to the rare earth waste scattering and grinding device, the motor drives the gear to rotate, the gear is meshed with the gear ring, then the collecting plates rotate, meanwhile, the rotating directions of the collecting plates and the grading impeller are opposite, material particles which are thrown by the grading impeller and do not meet the material diameter requirement can directly enter the space between the collecting plates, the material particles are prevented from entering the inner side of the inner barrel again, and the material particles are prevented from entering the inner barrel again. The material particles can conveniently return to a crushing area at the lower end of the flour mill main body.

Description

Technical Field

[0001] The invention relates to the technical field of grinding mills, in particular to a rare earth waste scattering and grinding device. Background Art

[0002] Rare earth waste mainly refers to waste generated during the mining, refining, processing and use of rare earths. These wastes still contain a certain amount of rare earth elements, but due to economic or technical reasons, they are not effectively extracted during the initial processing. However, if these wastes are not handled properly, they will not only waste resources, but also cause serious pollution to the environment. Therefore, at present, the waste is generally crushed first, and then the crushed rare earth waste is ground. Then, after magnetic separation and gravity separation, the useful components in the waste can be separated from the impurities, so as to maximize the recovery of rare earth resources and minimize the environmental impact. When grinding rare earth waste, most existing factories use Raymond mills to grind rare earth waste.

[0003] As in the prior art, the patent with patent authorization announcement number CN104998727B discloses a high-efficiency Raymond mill, including a machine base and an outer cylinder, a classifier is installed on the top of the outer cylinder, and the classifying impeller is located at the top of the inner cavity of the outer cylinder; a shaft seat is fixedly connected to the lower part of the inner cavity of the machine base, and a main shaft is rotatably connected in the shaft seat, the upper end of the main shaft extends into the inner cavity of the outer cylinder, and the lower end passes through the machine base, the upper end of the main shaft is connected to a grinding roller bracket, the grinding roller bracket is hinged with a grinding roller shaft, and the lower end of the grinding roller shaft is equipped with a grinding roller; a grinding ring that can cooperate with the grinding roller is fixedly connected to the upper part of the inner cavity of the machine base; the cavity section of the inner cavity of the machine base located between the grinding ring and the shaft seat is a shoveling cavity, and a shovel turntable fixed to the main shaft and connected to a shovel is provided in the shoveling cavity, and a feed port is provided on the outer cylinder; an air inlet is provided on the shaft seat, and the air inlet connects the shoveling cavity with the external space at the bottom of the machine base to realize bottom air intake of the Raymond mill. The machine has small air intake resistance, which can reduce energy consumption; it can reduce over-crushing of materials, has high crushing efficiency and low noise.

[0004] Although the Raymond mill in the above patent has a small air intake resistance and can reduce energy consumption, the Raymond mill still has certain defects when in use; when the grading impeller of the Raymond mill throws the particles that do not meet the particle size requirements into the backflow channel, these particles will first collide with the outer cylinder, and after the particles collide with the outer cylinder, it is easy to enter the inner side of the inner cylinder through rebound, which causes these particles that do not meet the particle size requirements to be blown up again by the airflow, making it impossible for these particles to return to the crushing area for continued crushing, affecting the grinding efficiency of the Raymond mill, so the Raymond mill needs to be improved. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a rare earth waste scattering and grinding device to solve the problems raised by the background technology, so that the particles in the grinding machine body that do not meet the material diameter requirements can be more easily returned to the crushing area.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a rare earth waste scattering and grinding device, comprising a grinding mill main body, a grading impeller connected to the upper end of the grinding mill main body, an inner cylinder provided inside the grinding mill main body, a C-shaped windshield fixedly connected to the lower end of the inner cylinder, the windshield fixedly connected to the inner wall of the grinding mill main body, a return cavity formed between the inner cylinder and the inner wall of the grinding mill main body, a gear ring rotatably connected to the upper end of the grinding mill main body, a plurality of collecting plates fixedly connected to the inner side of the gear ring, the collecting plates being inclined, a motor fixedly connected to the outer wall of the grinding mill main body, a gear fixedly connected to the output end of the motor, the gear meshingly connected to the gear ring, a pushing assembly connected to the bottom of one of the collecting plates, and a sealing assembly connected to the opening position of the windshield.

[0007] Furthermore, the pushing assembly includes a connecting plate and a pushing block, the top of the connecting plate is fixedly connected to the bottom of the collecting plate, the top of the pushing block is fixedly connected to the bottom of the connecting plate, and the pushing block matches the windshield.

[0008] Furthermore, the sealing assembly includes a collecting hopper, a base plate and a connecting rod, the top of the collecting hopper is fixedly connected to the notch position of the wind shield plate, a receiving groove is provided at the lower end of the collecting hopper, the base plate is located inside the receiving groove, and the base plate is slidably connected to the collecting hopper, a first sliding groove matching the connecting rod is provided inside the inner cylinder, a second sliding groove matching the connecting rod is provided on the inner wall of the grinding mill body, the connecting rod is located on both sides of the base plate, and the connecting rod is fixedly connected to the base plate.

[0009] Furthermore, the upper ends of the inner and outer sides of the push block are provided with limit grooves, the limit grooves match the connecting rod, cavities are provided on both sides of the interior of the push block, a tensioning elastic member is fixedly connected to the interior of the cavity, and two symmetrically arranged baffles are hinged at the upper end of one side of the push block, the baffles match the connecting rod, one end of the tensioning elastic member is fixedly connected to the cavity, and the other end of the tensioning elastic member is fixedly connected to the baffle.

[0010] Furthermore, a positioning slide rod is fixedly connected to the inner wall of the storage groove, a guide groove matching the positioning slide rod is opened inside the base plate, a reset elastic member is sleeved on the outside of the positioning slide rod, one end of the reset elastic member is fixedly connected to the inner wall of the storage groove, and the other end of the reset elastic member is fixedly connected to the side wall of the base plate.

[0011] Furthermore, a weighing sensor is fixedly connected to the top of the bottom plate, an alarm is fixedly connected to the top of the grinding mill body, and the weighing sensor is electrically connected to the alarm.

[0012] Furthermore, a connecting groove is provided at the top of the inner cylinder, a connecting ring is rotatably connected inside the connecting groove, the top of the connecting ring is fixedly connected to the bottom of the collecting plate, a positioning ring is fixedly connected to the side wall of the collecting plate, and the positioning ring is rotatably connected to the grinding mill body.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. In this rare earth waste scattering and grinding device, the motor drives the gear to rotate, and the gear meshes with the gear ring, which in turn causes the collecting plate to rotate. At the same time, the collecting plate rotates in the opposite direction to the grading impeller. The particles that do not meet the material diameter requirements thrown out by the grading impeller will directly enter between the collecting plates, preventing these particles from re-entering the inner side of the inner cylinder, making it convenient for these particles to return to the crushing area at the lower end of the grinding mill body.

[0015] 2. This rare earth waste scattering and grinding device is equipped with a wind shield to prevent wind from directly entering the return chamber, causing the particles that do not meet the material diameter requirements to be blown up again, making it take longer for these particles to return to the crushing area of ​​the mill body, affecting the working effect of the mill body.

[0016] 3. This rare earth waste scattering and grinding device further reduces the probability of wind entering the return material chamber through the blocking component, making it easier for the return material to return to the crushing area of ​​the grinding mill body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 A partial cross-sectional view of the present invention as a whole;

[0019] Figure 3 For the present invention Figure 2 A schematic diagram of the local enlarged structure at point A in the middle;

[0020] Figure 4 For the present invention Figure 2 A schematic diagram of the local enlarged structure at B in the middle;

[0021] Figure 5 It is a schematic diagram of the connection structure between the inner cylinder and the wind shield of the present invention;

[0022] Figure 6 For the present invention Figure 5 A schematic diagram of the local enlarged structure at C in the middle;

[0023] Figure 7It is a schematic diagram of the connection structure between the collecting plate and the gear ring of the present invention;

[0024] Figure 8 It is a partial cross-sectional view of the push block of the present invention.

[0025] In the figure: 1. grinding mill body; 2. grading impeller; 3. inner cylinder; 4. collecting plate; 5. gear ring; 6. positioning ring; 7. connecting ring; 8. motor; 9. gear; 10. wind shield; 11. connecting plate; 12. push block; 13. collecting hopper; 14. bottom plate; 15. connecting rod; 16. first slide groove; 17. second slide groove; 18. connecting groove; 19. receiving groove; 20. positioning slide rod; 21. reset elastic member; 22. guide groove; 23. weighing sensor; 24. limit groove; 25. cavity; 26. tensioning elastic member; 27. baffle; 28. alarm. DETAILED DESCRIPTION

[0026] 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.

[0027] See also Figures 1 to 8 A rare earth waste scattering and grinding device comprises a grinding mill body 1, a grading impeller 2 is connected to the upper end of the grinding mill body 1, an inner cylinder 3 is arranged inside the grinding mill body 1, a C-shaped windshield 10 is fixedly connected to the lower end of the inner cylinder 3, the windshield 10 is fixedly connected to the inner wall of the grinding mill body 1, a return cavity is formed between the inner cylinder 3 and the inner wall of the grinding mill body 1, a gear ring 5 is rotatably connected to the upper end of the grinding mill body 1, a plurality of collecting plates 4 are fixedly connected to the inner side of the gear ring 5, the collecting plates 4 are inclined, a motor 8 is fixedly connected to the outer wall of the grinding mill body 1, a gear 9 is fixedly connected to the output end of the motor 8, the gear 9 is meshingly connected to the gear ring 5, a pushing assembly is connected to the bottom of one of the collecting plates 4, and a blocking assembly is connected to the opening position of the windshield 10.

[0028] In the rare earth waste scattering and grinding device of the present invention, when the grinding mill body 1 is working, the motor 8 will also work at the same time, and the motor 8 will drive the gear ring 5 to rotate through the gear 9, thereby rotating the collecting plate 4, and the rotation direction of the collecting plate 4 is opposite to the rotation direction of the grading impeller 2. When the grading impeller 2 throws the particles that do not meet the material diameter requirements to the collecting plate 4, since the collecting plate 4 with an inclined design is in a rotating state, these particles will be pushed by the collecting plate 4 toward the inner wall of the grinding mill body 1, so as to prevent these particles from rebounding back to the interior of the inner cylinder 3, so that these particles are blown back to the position of the grading impeller 2 by the airflow, affecting the classification. The separation efficiency of the graded impeller 2 is improved. At the same time, the wind shield 10 at the bottom of the return chamber will block the airflow from entering from the bottom of the return chamber, making it easier for the particles to fall downward. During the rotation of the collecting plate 4, the pushing assembly will be driven to move, and the particles accumulated on the top of the wind shield 10 will be pushed to the notch position of the wind shield 10, so that these particles can return to the crushing area at the lower end of the mill body 1 for continued grinding and crushing. In addition, the structure of the mill body 1, the grading impeller 2 and the inner cylinder 3 in the present invention is similar to the prior art, and a high-efficiency Raymond mill structure disclosed in the patent with patent authorization announcement number CN104998727B is not elaborated here.

[0029] As a preferred technical solution of the present invention, the pushing assembly includes a connecting plate 11 and a pushing block 12, the top of the connecting plate 11 is fixedly connected to the bottom of the collecting plate 4, the top of the pushing block 12 is fixedly connected to the bottom of the connecting plate 11, and the pushing block 12 matches the windshield 10.

[0030] Specifically, when the collecting plate 4 rotates, the collecting plate 4 will drive the pushing block 12 to move together through the connecting plate 11, so that the pushing block 12 can push the particles in the return cavity to the notch position of the wind shield plate 10.

[0031] As a preferred technical solution of the present invention, the sealing assembly includes a collecting hopper 13, a bottom plate 14 and a connecting rod 15. The top of the collecting hopper 13 is fixedly connected to the notch position of the wind shield 10. A receiving groove 19 is provided at the lower end of the collecting hopper 13. The bottom plate 14 is located inside the receiving groove 19, and the bottom plate 14 is slidably connected to the collecting hopper 13. A first slide groove 16 matching the connecting rod 15 is provided inside the inner cylinder 3. A second slide groove 17 matching the connecting rod 15 is provided on the inner wall of the grinding mill body 1. The connecting rod 15 is located on both sides of the bottom plate 14, and the connecting rod 15 is fixedly connected to the bottom plate 14.

[0032] As a preferred technical solution of the present invention, the upper ends of the inner and outer sides of the push block 12 are provided with limit grooves 24, which match the connecting rod 15. Both sides of the push block 12 are provided with cavities 25, and the interior of the cavity 25 is fixedly connected with a tensioning elastic member 26. The upper end of one side of the push block 12 is hinged with two symmetrically arranged baffles 27, which match the connecting rod 15. One end of the tensioning elastic member 26 is fixedly connected to the cavity 25, and the other end of the tensioning elastic member 26 is fixedly connected to the baffle 27.

[0033] Specifically, when the push block 12 has not yet pushed the material to the collecting hopper 13, the bottom plate 14 is at the lower end of the collecting hopper 13, so that the collecting hopper 13 is closed to prevent airflow from entering the return material chamber. After the push block 12 pushes all the materials into the collecting hopper 13, the connecting rod 15 enters the limiting grooves 24 on both sides of the push block 12 and contacts the baffle 27. Since the bottom plate 14 and the connecting rod 15 are not blocked or restricted by other objects at this time, during the movement of the push block 12, the elastic member 26 is tightened to keep the baffle 27 in its original position, and the baffle 27 pushes the connecting rod 15 to move together, and the connecting rod 15 drives the bottom plate 14 Move to one side, so that the bottom of the collecting hopper 13 is opened, which is convenient for the particles to flow out of the collecting hopper 13, and it is convenient for these particles that do not meet the material diameter requirements to return to the crusher of the grinding mill body 1 for grinding and crushing; and after the bottom plate 14 is fully opened and the particles are emptied, the two connecting rods 15 will respectively abut against the side walls of the first chute 16 and the second chute 17, so that the connecting rod 15 cannot move. At this time, the baffle 27 will be pushed open by the connecting rod 15, which is convenient for the connecting rod 15 to disengage from the limiting groove 24. After the connecting rod 15 disengages from the limiting groove 24, the baffle 27 will be pulled back to its original position by the tensioning elastic member 26, which is convenient for pushing the bottom plate 14 to open next time.

[0034] As a preferred technical solution of the present invention, a positioning slide rod 20 is fixedly connected to the inner wall of the storage groove 19, a guide groove 22 matching the positioning slide rod 20 is opened inside the bottom plate 14, and a reset elastic member 21 is sleeved on the outside of the positioning slide rod 20, one end of the reset elastic member 21 is fixedly connected to the inner wall of the storage groove 19, and the other end of the reset elastic member 21 is fixedly connected to the side wall of the bottom plate 14.

[0035] Specifically, after the connecting rod 15 is disengaged from the limiting groove 24, under the action of the reset elastic member 21, the bottom plate 14 will be pushed back to the bottom of the collecting hopper 13, thereby completing the blocking of the outlet of the collecting hopper 13, preventing the airflow from entering the return cavity, causing the particles that do not meet the material diameter requirements to be blown up.

[0036] As a preferred technical solution of the present invention, a weighing sensor 23 is fixedly connected to the top of the bottom plate 14 , an alarm 28 is fixedly connected to the top of the grinding mill body 1 , and the weighing sensor 23 is electrically connected to the alarm 28 .

[0037] Specifically, since the rotation speed of the motor 8 is constant, the time taken by the push block 12 to move one circle along the bottom of the return chamber is also constant. At the same time, the amount of waste processed by the grinding mill body 1 per unit time is also constant. Therefore, the amount of particles entering the return chamber within a certain period of time is also relatively constant (the constant here refers to fluctuations within a certain range, not that the weight of the particles will not change 100%). Therefore, the weight of the particles pushed into the collecting hopper 13 by the push block 12 after one circle should also be within a certain range. If the weighing result of the weighing sensor 23 deviates greatly from the predicted range, an electrical signal will be transmitted to the alarm 28 and the alarm 28 will be activated, thereby reminding the staff to perform maintenance and repair on the grinding mill body 1, so that the staff can promptly detect problems with the grinding mill body 1.

[0038] As a preferred technical solution of the present invention, a connecting groove 18 is opened at the top of the inner cylinder 3, and a connecting ring 7 is rotatably connected inside the connecting groove 18. The top of the connecting ring 7 is fixedly connected to the bottom of the collecting plate 4, and a positioning ring 6 is fixedly connected to the side wall of the collecting plate 4. The positioning ring 6 is rotatably connected to the grinding mill body 1.

[0039] Specifically, the connecting ring 7 can reinforce the upper end of the inner cylinder 3 to prevent the upper end of the inner cylinder 3 from being deformed, and the positioning ring 6 can limit the positioning of the collecting plate 4 to prevent the lower end of the collecting plate 4 from being deformed when the collecting plate 4 moves.

[0040] It is worth noting that the motor 8, weighing sensor 23 and alarm 28 involved in the present invention are all controlled by an external control system (such as a control cabinet, console or control panel in a factory, etc.), and the motor 8, weighing sensor 23 and alarm 28 are all existing mature products, so no excessive elaboration will be made here.

[0041] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A rare earth waste scattering and grinding device, comprising a grinding mill body (1), wherein the upper end of the grinding mill body (1) is connected to a grading impeller (2), and an inner cylinder (3) is provided inside the grinding mill body (1), characterized in that: A C-shaped windshield (10) is fixedly connected to the lower end of the inner cylinder (3), the windshield (10) is fixedly connected to the inner wall of the grinding mill body (1), a material return chamber is formed between the inner cylinder (3) and the inner wall of the grinding mill body (1), a gear ring (5) is rotatably connected to the upper end of the grinding mill body (1), a plurality of collecting plates (4) are fixedly connected to the inner side of the gear ring (5), the collecting plates (4) are inclined, a motor (8) is fixedly connected to the outer wall of the grinding mill body (1), a gear (9) is fixedly connected to the output end of the motor (8), the gear (9) is meshingly connected to the gear ring (5), a material pushing assembly is connected to the bottom of one of the collecting plates (4), and a blocking assembly is connected to the opening of the windshield (10).

2. The rare earth waste scattering and grinding device according to claim 1, characterized in that: The pusher assembly comprises a connecting plate (11) and a pusher block (12); the top of the connecting plate (11) is fixedly connected to the bottom of the collecting plate (4); the top of the pusher block (12) is fixedly connected to the bottom of the connecting plate (11); and the pusher block (12) matches the windshield (10).

3. The rare earth waste scattering and grinding device according to claim 2, characterized in that: The blocking assembly comprises a collecting hopper (13), a bottom plate (14) and a connecting rod (15); the top of the collecting hopper (13) is fixedly connected to the notch position of the wind shield (10); a receiving groove (19) is provided at the lower end of the collecting hopper (13); the bottom plate (14) is located inside the receiving groove (19); the bottom plate (14) is slidably connected to the collecting hopper (13); a first sliding groove (16) matching the connecting rod (15) is provided inside the inner cylinder (3); a second sliding groove (17) matching the connecting rod (15) is provided on the inner wall of the grinding mill body (1); the connecting rod (15) is located on both sides of the bottom plate (14); and the connecting rod (15) is fixedly connected to the bottom plate (14).

4. The rare earth waste scattering and grinding device according to claim 3 is characterized in that: Limiting grooves (24) are provided at the upper ends of the inner and outer sides of the push block (12), and the limiting grooves (24) match the connecting rod (15). Cavities (25) are provided on both sides of the interior of the push block (12), and a tensioning elastic member (26) is fixedly connected to the interior of the cavity (25). Two symmetrically arranged baffles (27) are hingedly connected to the upper end of one side of the push block (12), and the baffles (27) match the connecting rod (15). One end of the tensioning elastic member (26) is fixedly connected to the cavity (25), and the other end of the tensioning elastic member (26) is fixedly connected to the baffle (27).

5. The rare earth waste scattering and grinding device according to claim 4 is characterized in that: A positioning slide bar (20) is fixedly connected to the inner wall of the receiving groove (19), a guide groove (22) matching the positioning slide bar (20) is provided inside the bottom plate (14), a reset elastic member (21) is sleeved on the outside of the positioning slide bar (20), one end of the reset elastic member (21) is fixedly connected to the inner wall of the receiving groove (19), and the other end of the reset elastic member (21) is fixedly connected to the side wall of the bottom plate (14).

6. The rare earth waste scattering and grinding device according to claim 3 is characterized in that: A weighing sensor (23) is fixedly connected to the top of the bottom plate (14), an alarm (28) is fixedly connected to the top of the grinding mill body (1), and the weighing sensor (23) is electrically connected to the alarm (28).

7. The rare earth waste scattering and grinding device according to claim 1, characterized in that: A connecting groove (18) is provided at the top of the inner cylinder (3), a connecting ring (7) is rotatably connected inside the connecting groove (18), the top of the connecting ring (7) is fixedly connected to the bottom of the collecting plate (4), a positioning ring (6) is fixedly connected to the side wall of the collecting plate (4), and the positioning ring (6) is rotatably connected to the grinding mill body (1).

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